diff --git a/.php_cs.dist b/.php_cs.dist
index 3d9248193b..fd6832920b 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -5,26 +5,26 @@ if (!file_exists(__DIR__.'/src')) {
 }
 
 return PhpCsFixer\Config::create()
-    ->setRules(array(
+    ->setRules([
         '@Symfony' => true,
         '@Symfony:risky' => true,
         '@PHPUnit48Migration:risky' => true,
         'php_unit_no_expectation_annotation' => false, // part of `PHPUnitXYMigration:risky` ruleset, to be enabled when PHPUnit 4.x support will be dropped, as we don't want to rewrite exceptions handling twice
-        'array_syntax' => array('syntax' => 'short'),
+        'array_syntax' => ['syntax' => 'short'],
         'fopen_flags' => false,
         'ordered_imports' => true,
         'protected_to_private' => false,
         // Part of @Symfony:risky in PHP-CS-Fixer 2.13.0. To be removed from the config file once upgrading
-        'native_function_invocation' => array('include' => array('@compiler_optimized'), 'scope' => 'namespaced'),
+        'native_function_invocation' => ['include' => ['@compiler_optimized'], 'scope' => 'namespaced'],
         // Part of future @Symfony ruleset in PHP-CS-Fixer To be removed from the config file once upgrading
-        'phpdoc_types_order' => array('null_adjustment' => 'always_last', 'sort_algorithm' => 'none'),
-    ))
+        'phpdoc_types_order' => ['null_adjustment' => 'always_last', 'sort_algorithm' => 'none'],
+    ])
     ->setRiskyAllowed(true)
     ->setFinder(
         PhpCsFixer\Finder::create()
             ->in(__DIR__.'/src')
-            ->append(array(__FILE__))
-            ->exclude(array(
+            ->append([__FILE__])
+            ->exclude([
                 'Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/Fixtures',
                 // directories containing files with content that is autogenerated by `var_export`, which breaks CS in output code
                 'Symfony/Component/DependencyInjection/Tests/Fixtures',
@@ -40,7 +40,7 @@ return PhpCsFixer\Config::create()
                 'Symfony/Bundle/FrameworkBundle/Resources/views/Form',
                 // explicit trigger_error tests
                 'Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/',
-            ))
+            ])
             // Support for older PHPunit version
             ->notPath('Symfony/Bridge/PhpUnit/SymfonyTestsListener.php')
             // file content autogenerated by `var_export`
diff --git a/UPGRADE-4.0.md b/UPGRADE-4.0.md
index fe43d0cf99..23ed6fbd33 100644
--- a/UPGRADE-4.0.md
+++ b/UPGRADE-4.0.md
@@ -92,7 +92,7 @@ Console
    ```php
    $commandTester = new CommandTester($command);
 
-   $commandTester->setInputs(array('AppBundle', 'Yes'));
+   $commandTester->setInputs(['AppBundle', 'Yes']);
 
    $commandTester->execute();
    ```
@@ -343,23 +343,23 @@ Form
 
    Before:
    ```php
-   $builder->add('custom_locales', LocaleType::class, array(
+   $builder->add('custom_locales', LocaleType::class, [
        'choices' => $availableLocales,
-   ));
+   ]);
    ```
 
    After:
    ```php
-   $builder->add('custom_locales', LocaleType::class, array(
+   $builder->add('custom_locales', LocaleType::class, [
        'choices' => $availableLocales,
        'choice_loader' => null,
-   ));
+   ]);
    // or
-   $builder->add('custom_locales', LocaleType::class, array(
+   $builder->add('custom_locales', LocaleType::class, [
        'choice_loader' => new CallbackChoiceLoader(function () {
            return $this->getAvailableLocales();
        }),
-   ));
+   ]);
    ```
 
  * Removed `ChoiceLoaderInterface` implementation in `TimezoneType`. Use the "choice_loader" option instead.
@@ -844,7 +844,7 @@ TwigBridge
    use Symfony\Bridge\Twig\Form\TwigRendererEngine;
 
    // ...
-   $rendererEngine = new TwigRendererEngine(array('form_div_layout.html.twig'));
+   $rendererEngine = new TwigRendererEngine(['form_div_layout.html.twig']);
    $rendererEngine->setEnvironment($twig);
    $twig->addExtension(new FormExtension(new TwigRenderer($rendererEngine, $csrfTokenManager)));
    ```
@@ -852,12 +852,12 @@ TwigBridge
    After:
 
    ```php
-   $rendererEngine = new TwigRendererEngine(array('form_div_layout.html.twig'), $twig);
-   $twig->addRuntimeLoader(new \Twig_FactoryRuntimeLoader(array(
+   $rendererEngine = new TwigRendererEngine(['form_div_layout.html.twig'], $twig);
+   $twig->addRuntimeLoader(new \Twig_FactoryRuntimeLoader([
        TwigRenderer::class => function () use ($rendererEngine, $csrfTokenManager) {
            return new TwigRenderer($rendererEngine, $csrfTokenManager);
        },
-   )));
+   ]));
    $twig->addExtension(new FormExtension());
    ```
 
@@ -1092,13 +1092,13 @@ Yaml
    Before:
 
    ```php
-   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, true);
+   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, true);
    ```
 
    After:
 
    ```php
-   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
+   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
    ```
 
  * Removed support for passing `true`/`false` as the fifth argument to the
@@ -1107,13 +1107,13 @@ Yaml
    Before:
 
    ```php
-   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, false, true);
+   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, false, true);
    ```
 
    After:
 
    ```php
-   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, false, Yaml::DUMP_OBJECT);
+   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, false, Yaml::DUMP_OBJECT);
    ```
 
  * The `!!php/object` tag to indicate dumped PHP objects was removed in favor of
diff --git a/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php b/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
index 20aaae85a1..66b99ecf62 100644
--- a/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
+++ b/src/Symfony/Bridge/Doctrine/ContainerAwareEventManager.php
@@ -27,8 +27,8 @@ class ContainerAwareEventManager extends EventManager
      *
      * <event> => <listeners>
      */
-    private $listeners = array();
-    private $initialized = array();
+    private $listeners = [];
+    private $initialized = [];
     private $container;
 
     public function __construct(ContainerInterface $container)
diff --git a/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php b/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
index 8cebac72c1..d4a86a7d54 100644
--- a/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
+++ b/src/Symfony/Bridge/Doctrine/DataCollector/DoctrineDataCollector.php
@@ -33,7 +33,7 @@ class DoctrineDataCollector extends DataCollector
     /**
      * @var DebugStack[]
      */
-    private $loggers = array();
+    private $loggers = [];
 
     public function __construct(ManagerRegistry $registry)
     {
@@ -58,24 +58,24 @@ class DoctrineDataCollector extends DataCollector
      */
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
-        $queries = array();
+        $queries = [];
         foreach ($this->loggers as $name => $logger) {
             $queries[$name] = $this->sanitizeQueries($name, $logger->queries);
         }
 
-        $this->data = array(
+        $this->data = [
             'queries' => $queries,
             'connections' => $this->connections,
             'managers' => $this->managers,
-        );
+        ];
     }
 
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
 
         foreach ($this->loggers as $logger) {
-            $logger->queries = array();
+            $logger->queries = [];
             $logger->currentQuery = 0;
         }
     }
@@ -133,10 +133,10 @@ class DoctrineDataCollector extends DataCollector
     {
         $query['explainable'] = true;
         if (null === $query['params']) {
-            $query['params'] = array();
+            $query['params'] = [];
         }
         if (!\is_array($query['params'])) {
-            $query['params'] = array($query['params']);
+            $query['params'] = [$query['params']];
         }
         foreach ($query['params'] as $j => $param) {
             if (isset($query['types'][$j])) {
@@ -180,12 +180,12 @@ class DoctrineDataCollector extends DataCollector
             $className = \get_class($var);
 
             return method_exists($var, '__toString') ?
-                array(sprintf('/* Object(%s): */"%s"', $className, $var->__toString()), false) :
-                array(sprintf('/* Object(%s) */', $className), false);
+                [sprintf('/* Object(%s): */"%s"', $className, $var->__toString()), false] :
+                [sprintf('/* Object(%s) */', $className), false];
         }
 
         if (\is_array($var)) {
-            $a = array();
+            $a = [];
             $original = true;
             foreach ($var as $k => $v) {
                 list($value, $orig) = $this->sanitizeParam($v);
@@ -193,13 +193,13 @@ class DoctrineDataCollector extends DataCollector
                 $a[$k] = $value;
             }
 
-            return array($a, $original);
+            return [$a, $original];
         }
 
         if (\is_resource($var)) {
-            return array(sprintf('/* Resource(%s) */', get_resource_type($var)), false);
+            return [sprintf('/* Resource(%s) */', get_resource_type($var)), false];
         }
 
-        return array($var, true);
+        return [$var, true];
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
index 94687b758f..a36b55eb16 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
@@ -27,12 +27,12 @@ abstract class AbstractDoctrineExtension extends Extension
     /**
      * Used inside metadata driver method to simplify aggregation of data.
      */
-    protected $aliasMap = array();
+    protected $aliasMap = [];
 
     /**
      * Used inside metadata driver method to simplify aggregation of data.
      */
-    protected $drivers = array();
+    protected $drivers = [];
 
     /**
      * @param array            $objectManager A configured object manager
@@ -46,10 +46,10 @@ abstract class AbstractDoctrineExtension extends Extension
             // automatically register bundle mappings
             foreach (array_keys($container->getParameter('kernel.bundles')) as $bundle) {
                 if (!isset($objectManager['mappings'][$bundle])) {
-                    $objectManager['mappings'][$bundle] = array(
+                    $objectManager['mappings'][$bundle] = [
                         'mapping' => true,
                         'is_bundle' => true,
-                    );
+                    ];
                 }
             }
         }
@@ -59,11 +59,11 @@ abstract class AbstractDoctrineExtension extends Extension
                 continue;
             }
 
-            $mappingConfig = array_replace(array(
+            $mappingConfig = array_replace([
                 'dir' => false,
                 'type' => false,
                 'prefix' => false,
-            ), (array) $mappingConfig);
+            ], (array) $mappingConfig);
 
             $mappingConfig['dir'] = $container->getParameterBag()->resolveValue($mappingConfig['dir']);
             // a bundle configuration is detected by realizing that the specified dir is not absolute and existing
@@ -153,7 +153,7 @@ abstract class AbstractDoctrineExtension extends Extension
         }
 
         if (!$bundleConfig['dir']) {
-            if (\in_array($bundleConfig['type'], array('annotation', 'staticphp'))) {
+            if (\in_array($bundleConfig['type'], ['annotation', 'staticphp'])) {
                 $bundleConfig['dir'] = $bundleDir.'/'.$this->getMappingObjectDefaultName();
             } else {
                 $bundleConfig['dir'] = $bundleDir.'/'.$this->getMappingResourceConfigDirectory();
@@ -197,25 +197,25 @@ abstract class AbstractDoctrineExtension extends Extension
                 }
                 $mappingDriverDef->setArguments($args);
             } elseif ('annotation' == $driverType) {
-                $mappingDriverDef = new Definition('%'.$this->getObjectManagerElementName('metadata.'.$driverType.'.class%'), array(
+                $mappingDriverDef = new Definition('%'.$this->getObjectManagerElementName('metadata.'.$driverType.'.class%'), [
                     new Reference($this->getObjectManagerElementName('metadata.annotation_reader')),
                     array_values($driverPaths),
-                ));
+                ]);
             } else {
-                $mappingDriverDef = new Definition('%'.$this->getObjectManagerElementName('metadata.'.$driverType.'.class%'), array(
+                $mappingDriverDef = new Definition('%'.$this->getObjectManagerElementName('metadata.'.$driverType.'.class%'), [
                     array_values($driverPaths),
-                ));
+                ]);
             }
             $mappingDriverDef->setPublic(false);
             if (false !== strpos($mappingDriverDef->getClass(), 'yml') || false !== strpos($mappingDriverDef->getClass(), 'xml')) {
-                $mappingDriverDef->setArguments(array(array_flip($driverPaths)));
-                $mappingDriverDef->addMethodCall('setGlobalBasename', array('mapping'));
+                $mappingDriverDef->setArguments([array_flip($driverPaths)]);
+                $mappingDriverDef->addMethodCall('setGlobalBasename', ['mapping']);
             }
 
             $container->setDefinition($mappingService, $mappingDriverDef);
 
             foreach ($driverPaths as $prefix => $driverPath) {
-                $chainDriverDef->addMethodCall('addDriver', array(new Reference($mappingService), $prefix));
+                $chainDriverDef->addMethodCall('addDriver', [new Reference($mappingService), $prefix]);
             }
         }
 
@@ -240,7 +240,7 @@ abstract class AbstractDoctrineExtension extends Extension
             throw new \InvalidArgumentException(sprintf('Specified non-existing directory "%s" as Doctrine mapping source.', $mappingConfig['dir']));
         }
 
-        if (!\in_array($mappingConfig['type'], array('xml', 'yml', 'annotation', 'php', 'staticphp'))) {
+        if (!\in_array($mappingConfig['type'], ['xml', 'yml', 'annotation', 'php', 'staticphp'])) {
             throw new \InvalidArgumentException(sprintf('Can only configure "xml", "yml", "annotation", "php" or '.
                 '"staticphp" through the DoctrineBundle. Use your own bundle to configure other metadata drivers. '.
                 'You can register them by adding a new driver to the '.
@@ -326,11 +326,11 @@ abstract class AbstractDoctrineExtension extends Extension
                 $cacheDef = new Definition($memcachedClass);
                 $memcachedInstance = new Definition($memcachedInstanceClass);
                 $memcachedInstance->setPrivate(true);
-                $memcachedInstance->addMethodCall('addServer', array(
+                $memcachedInstance->addMethodCall('addServer', [
                     $memcachedHost, $memcachedPort,
-                ));
+                ]);
                 $container->setDefinition($this->getObjectManagerElementName(sprintf('%s_memcached_instance', $objectManagerName)), $memcachedInstance);
-                $cacheDef->addMethodCall('setMemcached', array(new Reference($this->getObjectManagerElementName(sprintf('%s_memcached_instance', $objectManagerName)))));
+                $cacheDef->addMethodCall('setMemcached', [new Reference($this->getObjectManagerElementName(sprintf('%s_memcached_instance', $objectManagerName)))]);
                 break;
              case 'redis':
                 $redisClass = !empty($cacheDriver['class']) ? $cacheDriver['class'] : '%'.$this->getObjectManagerElementName('cache.redis.class').'%';
@@ -340,11 +340,11 @@ abstract class AbstractDoctrineExtension extends Extension
                 $cacheDef = new Definition($redisClass);
                 $redisInstance = new Definition($redisInstanceClass);
                 $redisInstance->setPrivate(true);
-                $redisInstance->addMethodCall('connect', array(
+                $redisInstance->addMethodCall('connect', [
                     $redisHost, $redisPort,
-                ));
+                ]);
                 $container->setDefinition($this->getObjectManagerElementName(sprintf('%s_redis_instance', $objectManagerName)), $redisInstance);
-                $cacheDef->addMethodCall('setRedis', array(new Reference($this->getObjectManagerElementName(sprintf('%s_redis_instance', $objectManagerName)))));
+                $cacheDef->addMethodCall('setRedis', [new Reference($this->getObjectManagerElementName(sprintf('%s_redis_instance', $objectManagerName)))]);
                 break;
             case 'apc':
             case 'apcu':
@@ -373,7 +373,7 @@ abstract class AbstractDoctrineExtension extends Extension
             $cacheDriver['namespace'] = $namespace;
         }
 
-        $cacheDef->addMethodCall('setNamespace', array($cacheDriver['namespace']));
+        $cacheDef->addMethodCall('setNamespace', [$cacheDriver['namespace']]);
 
         $container->setDefinition($cacheDriverServiceId, $cacheDef);
 
@@ -396,10 +396,10 @@ abstract class AbstractDoctrineExtension extends Extension
                         continue 2;
                     }
                 }
-                $managerConfigs[$autoMappedManager]['mappings'][$bundle] = array(
+                $managerConfigs[$autoMappedManager]['mappings'][$bundle] = [
                     'mapping' => true,
                     'is_bundle' => true,
-                );
+                ];
             }
             $managerConfigs[$autoMappedManager]['auto_mapping'] = false;
         }
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
index 46904ebbf4..deaa64e7c9 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPass.php
@@ -66,13 +66,13 @@ class RegisterEventListenersAndSubscribersPass implements CompilerPassInterface
 
         foreach ($taggedSubscribers as $taggedSubscriber) {
             list($id, $tag) = $taggedSubscriber;
-            $connections = isset($tag['connection']) ? array($tag['connection']) : array_keys($this->connections);
+            $connections = isset($tag['connection']) ? [$tag['connection']] : array_keys($this->connections);
             foreach ($connections as $con) {
                 if (!isset($this->connections[$con])) {
                     throw new RuntimeException(sprintf('The Doctrine connection "%s" referenced in service "%s" does not exist. Available connections names: %s', $con, $id, implode(', ', array_keys($this->connections))));
                 }
 
-                $this->getEventManagerDef($container, $con)->addMethodCall('addEventSubscriber', array(new Reference($id)));
+                $this->getEventManagerDef($container, $con)->addMethodCall('addEventSubscriber', [new Reference($id)]);
             }
         }
     }
@@ -81,7 +81,7 @@ class RegisterEventListenersAndSubscribersPass implements CompilerPassInterface
     {
         $listenerTag = $this->tagPrefix.'.event_listener';
         $taggedListeners = $this->findAndSortTags($listenerTag, $container);
-        $listenerRefs = array();
+        $listenerRefs = [];
 
         foreach ($taggedListeners as $taggedListener) {
             list($id, $tag) = $taggedListener;
@@ -89,7 +89,7 @@ class RegisterEventListenersAndSubscribersPass implements CompilerPassInterface
                 throw new InvalidArgumentException(sprintf('Doctrine event listener "%s" must specify the "event" attribute.', $id));
             }
 
-            $connections = isset($tag['connection']) ? array($tag['connection']) : array_keys($this->connections);
+            $connections = isset($tag['connection']) ? [$tag['connection']] : array_keys($this->connections);
             foreach ($connections as $con) {
                 if (!isset($this->connections[$con])) {
                     throw new RuntimeException(sprintf('The Doctrine connection "%s" referenced in service "%s" does not exist. Available connections names: %s', $con, $id, implode(', ', array_keys($this->connections))));
@@ -97,7 +97,7 @@ class RegisterEventListenersAndSubscribersPass implements CompilerPassInterface
                 $listenerRefs[$con][$id] = new Reference($id);
 
                 // we add one call per event per service so we have the correct order
-                $this->getEventManagerDef($container, $con)->addMethodCall('addEventListener', array(array($tag['event']), $id));
+                $this->getEventManagerDef($container, $con)->addMethodCall('addEventListener', [[$tag['event']], $id]);
             }
         }
 
@@ -135,12 +135,12 @@ class RegisterEventListenersAndSubscribersPass implements CompilerPassInterface
      */
     private function findAndSortTags($tagName, ContainerBuilder $container)
     {
-        $sortedTags = array();
+        $sortedTags = [];
 
         foreach ($container->findTaggedServiceIds($tagName, true) as $serviceId => $tags) {
             foreach ($tags as $attributes) {
                 $priority = isset($attributes['priority']) ? $attributes['priority'] : 0;
-                $sortedTags[$priority][] = array($serviceId, $attributes);
+                $sortedTags[$priority][] = [$serviceId, $attributes];
             }
         }
 
diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
index 44ad156219..5c33f71f04 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/CompilerPass/RegisterMappingsPass.php
@@ -50,7 +50,7 @@ abstract class RegisterMappingsPass implements CompilerPassInterface
     /**
      * List of potential container parameters that hold the object manager name
      * to register the mappings with the correct metadata driver, for example
-     * array('acme.manager', 'doctrine.default_entity_manager').
+     * ['acme.manager', 'doctrine.default_entity_manager'].
      *
      * @var string[]
      */
@@ -117,7 +117,7 @@ abstract class RegisterMappingsPass implements CompilerPassInterface
      *                                                      register alias
      * @param string[]             $aliasMap                Map of alias to namespace
      */
-    public function __construct($driver, array $namespaces, array $managerParameters, string $driverPattern, $enabledParameter = false, string $configurationPattern = '', string $registerAliasMethodName = '', array $aliasMap = array())
+    public function __construct($driver, array $namespaces, array $managerParameters, string $driverPattern, $enabledParameter = false, string $configurationPattern = '', string $registerAliasMethodName = '', array $aliasMap = [])
     {
         $this->driver = $driver;
         $this->namespaces = $namespaces;
@@ -146,7 +146,7 @@ abstract class RegisterMappingsPass implements CompilerPassInterface
         // Definition for a Doctrine\Common\Persistence\Mapping\Driver\MappingDriverChain
         $chainDriverDef = $container->getDefinition($chainDriverDefService);
         foreach ($this->namespaces as $namespace) {
-            $chainDriverDef->addMethodCall('addDriver', array($mappingDriverDef, $namespace));
+            $chainDriverDef->addMethodCall('addDriver', [$mappingDriverDef, $namespace]);
         }
 
         if (!\count($this->aliasMap)) {
@@ -157,7 +157,7 @@ abstract class RegisterMappingsPass implements CompilerPassInterface
         // Definition of the Doctrine\...\Configuration class specific to the Doctrine flavour.
         $configurationServiceDefinition = $container->getDefinition($configurationServiceName);
         foreach ($this->aliasMap as $alias => $namespace) {
-            $configurationServiceDefinition->addMethodCall($this->registerAliasMethodName, array($alias, $namespace));
+            $configurationServiceDefinition->addMethodCall($this->registerAliasMethodName, [$alias, $namespace]);
         }
     }
 
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
index 4b7b1ebe34..0ed66f8c44 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/DoctrineChoiceLoader.php
@@ -78,7 +78,7 @@ class DoctrineChoiceLoader implements ChoiceLoaderInterface
     {
         // Performance optimization
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // Optimize performance for single-field identifiers. We already
@@ -87,7 +87,7 @@ class DoctrineChoiceLoader implements ChoiceLoaderInterface
 
         // Attention: This optimization does not check choices for existence
         if ($optimize && !$this->choiceList && $this->idReader->isSingleId()) {
-            $values = array();
+            $values = [];
 
             // Maintain order and indices of the given objects
             foreach ($choices as $i => $object) {
@@ -115,7 +115,7 @@ class DoctrineChoiceLoader implements ChoiceLoaderInterface
         // statements, consequently no test fails when this code is removed.
         // https://github.com/symfony/symfony/pull/8981#issuecomment-24230557
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         // Optimize performance in case we have an object loader and
@@ -124,8 +124,8 @@ class DoctrineChoiceLoader implements ChoiceLoaderInterface
 
         if ($optimize && !$this->choiceList && $this->objectLoader && $this->idReader->isSingleId()) {
             $unorderedObjects = $this->objectLoader->getEntitiesByIds($this->idReader->getIdField(), $values);
-            $objectsById = array();
-            $objects = array();
+            $objectsById = [];
+            $objects = [];
 
             // Maintain order and indices from the given $values
             // An alternative approach to the following loop is to add the
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
index 381d02fcbe..3509d9b03b 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/IdReader.php
@@ -43,7 +43,7 @@ class IdReader
         $this->om = $om;
         $this->classMetadata = $classMetadata;
         $this->singleId = 1 === \count($ids);
-        $this->intId = $this->singleId && \in_array($idType, array('integer', 'smallint', 'bigint'));
+        $this->intId = $this->singleId && \in_array($idType, ['integer', 'smallint', 'bigint']);
         $this->idField = current($ids);
 
         // single field association are resolved, since the schema column could be an int
diff --git a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
index a2f1fa7ae8..96f5e2f5f1 100644
--- a/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
+++ b/src/Symfony/Bridge/Doctrine/Form/ChoiceList/ORMQueryBuilderLoader.php
@@ -64,7 +64,7 @@ class ORMQueryBuilderLoader implements EntityLoaderInterface
         // Guess type
         $entity = current($qb->getRootEntities());
         $metadata = $qb->getEntityManager()->getClassMetadata($entity);
-        if (\in_array($metadata->getTypeOfField($identifier), array('integer', 'bigint', 'smallint'))) {
+        if (\in_array($metadata->getTypeOfField($identifier), ['integer', 'bigint', 'smallint'])) {
             $parameterType = Connection::PARAM_INT_ARRAY;
 
             // Filter out non-integer values (e.g. ""). If we don't, some
@@ -72,7 +72,7 @@ class ORMQueryBuilderLoader implements EntityLoaderInterface
             $values = array_values(array_filter($values, function ($v) {
                 return (string) $v === (string) (int) $v || ctype_digit($v);
             }));
-        } elseif (\in_array($metadata->getTypeOfField($identifier), array('uuid', 'guid'))) {
+        } elseif (\in_array($metadata->getTypeOfField($identifier), ['uuid', 'guid'])) {
             $parameterType = Connection::PARAM_STR_ARRAY;
 
             // Like above, but we just filter out empty strings.
@@ -83,7 +83,7 @@ class ORMQueryBuilderLoader implements EntityLoaderInterface
             $parameterType = Connection::PARAM_STR_ARRAY;
         }
         if (!$values) {
-            return array();
+            return [];
         }
 
         return $qb->andWhere($where)
diff --git a/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php b/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
index 4010512ba9..3202dae97f 100644
--- a/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
+++ b/src/Symfony/Bridge/Doctrine/Form/DataTransformer/CollectionToArrayTransformer.php
@@ -31,7 +31,7 @@ class CollectionToArrayTransformer implements DataTransformerInterface
     public function transform($collection)
     {
         if (null === $collection) {
-            return array();
+            return [];
         }
 
         // For cases when the collection getter returns $collection->toArray()
@@ -57,7 +57,7 @@ class CollectionToArrayTransformer implements DataTransformerInterface
     public function reverseTransform($array)
     {
         if ('' === $array || null === $array) {
-            $array = array();
+            $array = [];
         } else {
             $array = (array) $array;
         }
diff --git a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmExtension.php b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmExtension.php
index fe86b103cb..891754a1da 100644
--- a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmExtension.php
+++ b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmExtension.php
@@ -26,9 +26,9 @@ class DoctrineOrmExtension extends AbstractExtension
 
     protected function loadTypes()
     {
-        return array(
+        return [
             new EntityType($this->registry),
-        );
+        ];
     }
 
     protected function loadTypeGuesser()
diff --git a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
index e85145d1ea..d9f7f391d2 100644
--- a/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
+++ b/src/Symfony/Bridge/Doctrine/Form/DoctrineOrmTypeGuesser.php
@@ -26,7 +26,7 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
 {
     protected $registry;
 
-    private $cache = array();
+    private $cache = [];
 
     public function __construct(ManagerRegistry $registry)
     {
@@ -39,7 +39,7 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
     public function guessType($class, $property)
     {
         if (!$ret = $this->getMetadata($class)) {
-            return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::LOW_CONFIDENCE);
+            return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::LOW_CONFIDENCE);
         }
 
         list($metadata, $name) = $ret;
@@ -48,45 +48,45 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
             $multiple = $metadata->isCollectionValuedAssociation($property);
             $mapping = $metadata->getAssociationMapping($property);
 
-            return new TypeGuess('Symfony\Bridge\Doctrine\Form\Type\EntityType', array('em' => $name, 'class' => $mapping['targetEntity'], 'multiple' => $multiple), Guess::HIGH_CONFIDENCE);
+            return new TypeGuess('Symfony\Bridge\Doctrine\Form\Type\EntityType', ['em' => $name, 'class' => $mapping['targetEntity'], 'multiple' => $multiple], Guess::HIGH_CONFIDENCE);
         }
 
         switch ($metadata->getTypeOfField($property)) {
             case Type::TARRAY:
             case Type::SIMPLE_ARRAY:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', [], Guess::MEDIUM_CONFIDENCE);
             case Type::BOOLEAN:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', [], Guess::HIGH_CONFIDENCE);
             case Type::DATETIME:
             case Type::DATETIMETZ:
             case 'vardatetime':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', [], Guess::HIGH_CONFIDENCE);
             case 'datetime_immutable':
             case 'datetimetz_immutable':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', array('input' => 'datetime_immutable'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', ['input' => 'datetime_immutable'], Guess::HIGH_CONFIDENCE);
             case 'dateinterval':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateIntervalType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateIntervalType', [], Guess::HIGH_CONFIDENCE);
             case Type::DATE:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', [], Guess::HIGH_CONFIDENCE);
             case 'date_immutable':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', array('input' => 'datetime_immutable'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', ['input' => 'datetime_immutable'], Guess::HIGH_CONFIDENCE);
             case Type::TIME:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', [], Guess::HIGH_CONFIDENCE);
             case 'time_immutable':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', array('input' => 'datetime_immutable'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', ['input' => 'datetime_immutable'], Guess::HIGH_CONFIDENCE);
             case Type::DECIMAL:
             case Type::FLOAT:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', [], Guess::MEDIUM_CONFIDENCE);
             case Type::INTEGER:
             case Type::BIGINT:
             case Type::SMALLINT:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\IntegerType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\IntegerType', [], Guess::MEDIUM_CONFIDENCE);
             case Type::STRING:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::MEDIUM_CONFIDENCE);
             case Type::TEXT:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextareaType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextareaType', [], Guess::MEDIUM_CONFIDENCE);
             default:
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::LOW_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::LOW_CONFIDENCE);
         }
     }
 
@@ -141,7 +141,7 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
                 return new ValueGuess($mapping['length'], Guess::HIGH_CONFIDENCE);
             }
 
-            if (\in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
+            if (\in_array($ret[0]->getTypeOfField($property), [Type::DECIMAL, Type::FLOAT])) {
                 return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
             }
         }
@@ -154,7 +154,7 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
     {
         $ret = $this->getMetadata($class);
         if ($ret && isset($ret[0]->fieldMappings[$property]) && !$ret[0]->hasAssociation($property)) {
-            if (\in_array($ret[0]->getTypeOfField($property), array(Type::DECIMAL, Type::FLOAT))) {
+            if (\in_array($ret[0]->getTypeOfField($property), [Type::DECIMAL, Type::FLOAT])) {
                 return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
             }
         }
@@ -172,7 +172,7 @@ class DoctrineOrmTypeGuesser implements FormTypeGuesserInterface
         $this->cache[$class] = null;
         foreach ($this->registry->getManagers() as $name => $em) {
             try {
-                return $this->cache[$class] = array($em->getClassMetadata($class), $name);
+                return $this->cache[$class] = [$em->getClassMetadata($class), $name];
             } catch (MappingException $e) {
                 // not an entity or mapped super class
             } catch (LegacyMappingException $e) {
diff --git a/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php b/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
index 22517181f7..1ec496b781 100644
--- a/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
+++ b/src/Symfony/Bridge/Doctrine/Form/EventListener/MergeDoctrineCollectionListener.php
@@ -31,11 +31,11 @@ class MergeDoctrineCollectionListener implements EventSubscriberInterface
     {
         // Higher priority than core MergeCollectionListener so that this one
         // is called before
-        return array(
-            FormEvents::SUBMIT => array(
-                array('onSubmit', 5),
-            ),
-        );
+        return [
+            FormEvents::SUBMIT => [
+                ['onSubmit', 5],
+            ],
+        ];
     }
 
     public function onSubmit(FormEvent $event)
diff --git a/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php b/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
index 4bfd773970..327e7abb05 100644
--- a/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
+++ b/src/Symfony/Bridge/Doctrine/Form/Type/DoctrineType.php
@@ -36,12 +36,12 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
     /**
      * @var IdReader[]
      */
-    private $idReaders = array();
+    private $idReaders = [];
 
     /**
      * @var DoctrineChoiceLoader[]
      */
-    private $choiceLoaders = array();
+    private $choiceLoaders = [];
 
     /**
      * Creates the label for a choice.
@@ -127,11 +127,11 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
                 // also if concrete Type can return important QueryBuilder parts to generate
                 // hash key we go for it as well
                 if (!$options['query_builder'] || false !== ($qbParts = $this->getQueryBuilderPartsForCachingHash($options['query_builder']))) {
-                    $hash = CachingFactoryDecorator::generateHash(array(
+                    $hash = CachingFactoryDecorator::generateHash([
                         $options['em'],
                         $options['class'],
                         $qbParts,
-                    ));
+                    ]);
 
                     if (isset($this->choiceLoaders[$hash])) {
                         return $this->choiceLoaders[$hash];
@@ -168,7 +168,7 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
             // field name. We can only use numeric IDs as names, as we cannot
             // guarantee that a non-numeric ID contains a valid form name
             if ($idReader->isIntId()) {
-                return array(__CLASS__, 'createChoiceName');
+                return [__CLASS__, 'createChoiceName'];
             }
 
             // Otherwise, an incrementing integer is used as name automatically
@@ -184,7 +184,7 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
 
             // If the entity has a single-column ID, use that ID as value
             if ($idReader->isSingleId()) {
-                return array($idReader, 'getIdValue');
+                return [$idReader, 'getIdValue'];
             }
 
             // Otherwise, an incrementing integer is used as value automatically
@@ -222,10 +222,10 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
         // Set the "id_reader" option via the normalizer. This option is not
         // supposed to be set by the user.
         $idReaderNormalizer = function (Options $options) {
-            $hash = CachingFactoryDecorator::generateHash(array(
+            $hash = CachingFactoryDecorator::generateHash([
                 $options['em'],
                 $options['class'],
-            ));
+            ]);
 
             // The ID reader is a utility that is needed to read the object IDs
             // when generating the field values. The callback generating the
@@ -241,25 +241,25 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
             return $this->idReaders[$hash];
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'em' => null,
             'query_builder' => null,
             'choices' => null,
             'choice_loader' => $choiceLoader,
-            'choice_label' => array(__CLASS__, 'createChoiceLabel'),
+            'choice_label' => [__CLASS__, 'createChoiceLabel'],
             'choice_name' => $choiceName,
             'choice_value' => $choiceValue,
             'id_reader' => null, // internal
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $resolver->setRequired(array('class'));
+        $resolver->setRequired(['class']);
 
         $resolver->setNormalizer('em', $emNormalizer);
         $resolver->setNormalizer('query_builder', $queryBuilderNormalizer);
         $resolver->setNormalizer('id_reader', $idReaderNormalizer);
 
-        $resolver->setAllowedTypes('em', array('null', 'string', 'Doctrine\Common\Persistence\ObjectManager'));
+        $resolver->setAllowedTypes('em', ['null', 'string', 'Doctrine\Common\Persistence\ObjectManager']);
     }
 
     /**
@@ -280,6 +280,6 @@ abstract class DoctrineType extends AbstractType implements ResetInterface
 
     public function reset()
     {
-        $this->choiceLoaders = array();
+        $this->choiceLoaders = [];
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
index 2adb82fad3..b6c598350c 100644
--- a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
+++ b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
@@ -40,7 +40,7 @@ class EntityType extends DoctrineType
         };
 
         $resolver->setNormalizer('query_builder', $queryBuilderNormalizer);
-        $resolver->setAllowedTypes('query_builder', array('null', 'callable', 'Doctrine\ORM\QueryBuilder'));
+        $resolver->setAllowedTypes('query_builder', ['null', 'callable', 'Doctrine\ORM\QueryBuilder']);
     }
 
     /**
@@ -78,10 +78,10 @@ class EntityType extends DoctrineType
      */
     public function getQueryBuilderPartsForCachingHash($queryBuilder)
     {
-        return array(
+        return [
             $queryBuilder->getQuery()->getSQL(),
-            array_map(array($this, 'parameterToArray'), $queryBuilder->getParameters()->toArray()),
-        );
+            array_map([$this, 'parameterToArray'], $queryBuilder->getParameters()->toArray()),
+        ];
     }
 
     /**
@@ -91,6 +91,6 @@ class EntityType extends DoctrineType
      */
     private function parameterToArray(Parameter $parameter)
     {
-        return array($parameter->getName(), $parameter->getType(), $parameter->getValue());
+        return [$parameter->getName(), $parameter->getType(), $parameter->getValue()];
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php b/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
index 0200c2657a..63880a6d61 100644
--- a/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
+++ b/src/Symfony/Bridge/Doctrine/Logger/DbalLogger.php
@@ -42,7 +42,7 @@ class DbalLogger implements SQLLogger
         }
 
         if (null !== $this->logger) {
-            $this->log($sql, null === $params ? array() : $this->normalizeParams($params));
+            $this->log($sql, null === $params ? [] : $this->normalizeParams($params));
         }
     }
 
diff --git a/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php b/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
index 030b09ecca..b3d17e3db0 100644
--- a/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
+++ b/src/Symfony/Bridge/Doctrine/PropertyInfo/DoctrineExtractor.php
@@ -49,7 +49,7 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
         try {
             $metadata = $this->entityManager ? $this->entityManager->getClassMetadata($class) : $this->classMetadataFactory->getMetadataFor($class);
@@ -75,7 +75,7 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
         try {
             $metadata = $this->entityManager ? $this->entityManager->getClassMetadata($class) : $this->classMetadataFactory->getMetadataFor($class);
@@ -97,7 +97,7 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
                     $nullable = false;
                 }
 
-                return array(new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, $class));
+                return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, $class)];
             }
 
             $collectionKeyType = Type::BUILTIN_TYPE_INT;
@@ -124,18 +124,18 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
                 }
             }
 
-            return array(new Type(
+            return [new Type(
                 Type::BUILTIN_TYPE_OBJECT,
                 false,
                 'Doctrine\Common\Collections\Collection',
                 true,
                 new Type($collectionKeyType),
                 new Type(Type::BUILTIN_TYPE_OBJECT, false, $class)
-            ));
+            )];
         }
 
         if ($metadata instanceof ClassMetadataInfo && class_exists('Doctrine\ORM\Mapping\Embedded') && isset($metadata->embeddedClasses[$property])) {
-            return array(new Type(Type::BUILTIN_TYPE_OBJECT, false, $metadata->embeddedClasses[$property]['class']));
+            return [new Type(Type::BUILTIN_TYPE_OBJECT, false, $metadata->embeddedClasses[$property]['class'])];
         }
 
         if ($metadata->hasField($property)) {
@@ -148,30 +148,30 @@ class DoctrineExtractor implements PropertyListExtractorInterface, PropertyTypeE
                 case DBALType::DATETIMETZ:
                 case 'vardatetime':
                 case DBALType::TIME:
-                    return array(new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateTime'));
+                    return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateTime')];
 
                 case 'date_immutable':
                 case 'datetime_immutable':
                 case 'datetimetz_immutable':
                 case 'time_immutable':
-                    return array(new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateTimeImmutable'));
+                    return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateTimeImmutable')];
 
                 case 'dateinterval':
-                    return array(new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateInterval'));
+                    return [new Type(Type::BUILTIN_TYPE_OBJECT, $nullable, 'DateInterval')];
 
                 case DBALType::TARRAY:
-                    return array(new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true));
+                    return [new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true)];
 
                 case DBALType::SIMPLE_ARRAY:
-                    return array(new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING)));
+                    return [new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))];
 
                 case DBALType::JSON_ARRAY:
-                    return array(new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true));
+                    return [new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true)];
 
                 default:
                     $builtinType = $this->getPhpType($typeOfField);
 
-                    return $builtinType ? array(new Type($builtinType, $nullable)) : null;
+                    return $builtinType ? [new Type($builtinType, $nullable)] : null;
             }
         }
     }
diff --git a/src/Symfony/Bridge/Doctrine/Security/RememberMe/DoctrineTokenProvider.php b/src/Symfony/Bridge/Doctrine/Security/RememberMe/DoctrineTokenProvider.php
index 5e41b10e14..64515fac71 100644
--- a/src/Symfony/Bridge/Doctrine/Security/RememberMe/DoctrineTokenProvider.php
+++ b/src/Symfony/Bridge/Doctrine/Security/RememberMe/DoctrineTokenProvider.php
@@ -53,8 +53,8 @@ class DoctrineTokenProvider implements TokenProviderInterface
         // the alias for lastUsed works around case insensitivity in PostgreSQL
         $sql = 'SELECT class, username, value, lastUsed AS last_used'
             .' FROM rememberme_token WHERE series=:series';
-        $paramValues = array('series' => $series);
-        $paramTypes = array('series' => \PDO::PARAM_STR);
+        $paramValues = ['series' => $series];
+        $paramTypes = ['series' => \PDO::PARAM_STR];
         $stmt = $this->conn->executeQuery($sql, $paramValues, $paramTypes);
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
 
@@ -71,8 +71,8 @@ class DoctrineTokenProvider implements TokenProviderInterface
     public function deleteTokenBySeries($series)
     {
         $sql = 'DELETE FROM rememberme_token WHERE series=:series';
-        $paramValues = array('series' => $series);
-        $paramTypes = array('series' => \PDO::PARAM_STR);
+        $paramValues = ['series' => $series];
+        $paramTypes = ['series' => \PDO::PARAM_STR];
         $this->conn->executeUpdate($sql, $paramValues, $paramTypes);
     }
 
@@ -83,16 +83,16 @@ class DoctrineTokenProvider implements TokenProviderInterface
     {
         $sql = 'UPDATE rememberme_token SET value=:value, lastUsed=:lastUsed'
             .' WHERE series=:series';
-        $paramValues = array(
+        $paramValues = [
             'value' => $tokenValue,
             'lastUsed' => $lastUsed,
             'series' => $series,
-        );
-        $paramTypes = array(
+        ];
+        $paramTypes = [
             'value' => \PDO::PARAM_STR,
             'lastUsed' => DoctrineType::DATETIME,
             'series' => \PDO::PARAM_STR,
-        );
+        ];
         $updated = $this->conn->executeUpdate($sql, $paramValues, $paramTypes);
         if ($updated < 1) {
             throw new TokenNotFoundException('No token found.');
@@ -107,20 +107,20 @@ class DoctrineTokenProvider implements TokenProviderInterface
         $sql = 'INSERT INTO rememberme_token'
             .' (class, username, series, value, lastUsed)'
             .' VALUES (:class, :username, :series, :value, :lastUsed)';
-        $paramValues = array(
+        $paramValues = [
             'class' => $token->getClass(),
             'username' => $token->getUsername(),
             'series' => $token->getSeries(),
             'value' => $token->getTokenValue(),
             'lastUsed' => $token->getLastUsed(),
-        );
-        $paramTypes = array(
+        ];
+        $paramTypes = [
             'class' => \PDO::PARAM_STR,
             'username' => \PDO::PARAM_STR,
             'series' => \PDO::PARAM_STR,
             'value' => \PDO::PARAM_STR,
             'lastUsed' => DoctrineType::DATETIME,
-        );
+        ];
         $this->conn->executeUpdate($sql, $paramValues, $paramTypes);
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php b/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
index 726548e174..769e9bb20e 100644
--- a/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
+++ b/src/Symfony/Bridge/Doctrine/Security/User/EntityUserProvider.php
@@ -48,7 +48,7 @@ class EntityUserProvider implements UserProviderInterface
     {
         $repository = $this->getRepository();
         if (null !== $this->property) {
-            $user = $repository->findOneBy(array($this->property => $username));
+            $user = $repository->findOneBy([$this->property => $username]);
         } else {
             if (!$repository instanceof UserLoaderInterface) {
                 throw new \InvalidArgumentException(sprintf('You must either make the "%s" entity Doctrine Repository ("%s") implement "Symfony\Bridge\Doctrine\Security\User\UserLoaderInterface" or set the "property" option in the corresponding entity provider configuration.', $this->classOrAlias, \get_class($repository)));
diff --git a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
index 06dc628475..3f6ffeebb6 100644
--- a/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
+++ b/src/Symfony/Bridge/Doctrine/Test/DoctrineTestHelper.php
@@ -42,10 +42,10 @@ class DoctrineTestHelper
             $config = self::createTestConfiguration();
         }
 
-        $params = array(
+        $params = [
             'driver' => 'pdo_sqlite',
             'memory' => true,
-        );
+        ];
 
         return EntityManager::create($params, $config);
     }
@@ -56,7 +56,7 @@ class DoctrineTestHelper
     public static function createTestConfiguration()
     {
         $config = new Configuration();
-        $config->setEntityNamespaces(array('SymfonyTestsDoctrine' => 'Symfony\Bridge\Doctrine\Tests\Fixtures'));
+        $config->setEntityNamespaces(['SymfonyTestsDoctrine' => 'Symfony\Bridge\Doctrine\Tests\Fixtures']);
         $config->setAutoGenerateProxyClasses(true);
         $config->setProxyDir(\sys_get_temp_dir());
         $config->setProxyNamespace('SymfonyTests\Doctrine');
diff --git a/src/Symfony/Bridge/Doctrine/Test/TestRepositoryFactory.php b/src/Symfony/Bridge/Doctrine/Test/TestRepositoryFactory.php
index b7cbafa947..e7df3702eb 100644
--- a/src/Symfony/Bridge/Doctrine/Test/TestRepositoryFactory.php
+++ b/src/Symfony/Bridge/Doctrine/Test/TestRepositoryFactory.php
@@ -24,7 +24,7 @@ final class TestRepositoryFactory implements RepositoryFactory
     /**
      * @var ObjectRepository[]
      */
-    private $repositoryList = array();
+    private $repositoryList = [];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php b/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
index f40d1ca710..2e97edb1d2 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/ContainerAwareEventManagerTest.php
@@ -43,15 +43,15 @@ class ContainerAwareEventManagerTest extends TestCase
         $this->evm->addEventListener('foo', 'bar');
         $this->evm->addEventListener('foo', $listener = new MyListener());
 
-        $listeners = array('foo' => array('_service_bar' => 'bar', spl_object_hash($listener) => $listener));
+        $listeners = ['foo' => ['_service_bar' => 'bar', spl_object_hash($listener) => $listener]];
         $this->assertSame($listeners, $this->evm->getListeners());
         $this->assertSame($listeners['foo'], $this->evm->getListeners('foo'));
 
         $this->evm->removeEventListener('foo', $listener);
-        $this->assertSame(array('_service_bar' => 'bar'), $this->evm->getListeners('foo'));
+        $this->assertSame(['_service_bar' => 'bar'], $this->evm->getListeners('foo'));
 
         $this->evm->removeEventListener('foo', 'bar');
-        $this->assertSame(array(), $this->evm->getListeners('foo'));
+        $this->assertSame([], $this->evm->getListeners('foo'));
     }
 }
 
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php b/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
index 8e9abd618b..2595328790 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DataCollector/DoctrineDataCollectorTest.php
@@ -22,27 +22,27 @@ class DoctrineDataCollectorTest extends TestCase
 {
     public function testCollectConnections()
     {
-        $c = $this->createCollector(array());
+        $c = $this->createCollector([]);
         $c->collect(new Request(), new Response());
-        $this->assertEquals(array('default' => 'doctrine.dbal.default_connection'), $c->getConnections());
+        $this->assertEquals(['default' => 'doctrine.dbal.default_connection'], $c->getConnections());
     }
 
     public function testCollectManagers()
     {
-        $c = $this->createCollector(array());
+        $c = $this->createCollector([]);
         $c->collect(new Request(), new Response());
-        $this->assertEquals(array('default' => 'doctrine.orm.default_entity_manager'), $c->getManagers());
+        $this->assertEquals(['default' => 'doctrine.orm.default_entity_manager'], $c->getManagers());
     }
 
     public function testCollectQueryCount()
     {
-        $c = $this->createCollector(array());
+        $c = $this->createCollector([]);
         $c->collect(new Request(), new Response());
         $this->assertEquals(0, $c->getQueryCount());
 
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1', 'params' => array(), 'types' => array(), 'executionMS' => 0),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1', 'params' => [], 'types' => [], 'executionMS' => 0],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
         $this->assertEquals(1, $c->getQueryCount());
@@ -50,21 +50,21 @@ class DoctrineDataCollectorTest extends TestCase
 
     public function testCollectTime()
     {
-        $c = $this->createCollector(array());
+        $c = $this->createCollector([]);
         $c->collect(new Request(), new Response());
         $this->assertEquals(0, $c->getTime());
 
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1', 'params' => array(), 'types' => array(), 'executionMS' => 1),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1', 'params' => [], 'types' => [], 'executionMS' => 1],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
         $this->assertEquals(1, $c->getTime());
 
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1', 'params' => array(), 'types' => array(), 'executionMS' => 1),
-            array('sql' => 'SELECT * FROM table2', 'params' => array(), 'types' => array(), 'executionMS' => 2),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1', 'params' => [], 'types' => [], 'executionMS' => 1],
+            ['sql' => 'SELECT * FROM table2', 'params' => [], 'types' => [], 'executionMS' => 2],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
         $this->assertEquals(3, $c->getTime());
@@ -75,9 +75,9 @@ class DoctrineDataCollectorTest extends TestCase
      */
     public function testCollectQueries($param, $types, $expected, $explainable)
     {
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1 WHERE field1 = ?1', 'params' => array($param), 'types' => $types, 'executionMS' => 1),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1 WHERE field1 = ?1', 'params' => [$param], 'types' => $types, 'executionMS' => 1],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
 
@@ -88,32 +88,32 @@ class DoctrineDataCollectorTest extends TestCase
 
     public function testCollectQueryWithNoParams()
     {
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1', 'params' => array(), 'types' => array(), 'executionMS' => 1),
-            array('sql' => 'SELECT * FROM table1', 'params' => null, 'types' => null, 'executionMS' => 1),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1', 'params' => [], 'types' => [], 'executionMS' => 1],
+            ['sql' => 'SELECT * FROM table1', 'params' => null, 'types' => null, 'executionMS' => 1],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
 
         $collectedQueries = $c->getQueries();
-        $this->assertEquals(array(), $collectedQueries['default'][0]['params']);
+        $this->assertEquals([], $collectedQueries['default'][0]['params']);
         $this->assertTrue($collectedQueries['default'][0]['explainable']);
-        $this->assertEquals(array(), $collectedQueries['default'][1]['params']);
+        $this->assertEquals([], $collectedQueries['default'][1]['params']);
         $this->assertTrue($collectedQueries['default'][1]['explainable']);
     }
 
     public function testReset()
     {
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1', 'params' => array(), 'types' => array(), 'executionMS' => 1),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1', 'params' => [], 'types' => [], 'executionMS' => 1],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
 
         $c->reset();
         $c->collect(new Request(), new Response());
 
-        $this->assertEquals(array('default' => array()), $c->getQueries());
+        $this->assertEquals(['default' => []], $c->getQueries());
     }
 
     /**
@@ -121,9 +121,9 @@ class DoctrineDataCollectorTest extends TestCase
      */
     public function testSerialization($param, $types, $expected, $explainable)
     {
-        $queries = array(
-            array('sql' => 'SELECT * FROM table1 WHERE field1 = ?1', 'params' => array($param), 'types' => $types, 'executionMS' => 1),
-        );
+        $queries = [
+            ['sql' => 'SELECT * FROM table1 WHERE field1 = ?1', 'params' => [$param], 'types' => $types, 'executionMS' => 1],
+        ];
         $c = $this->createCollector($queries);
         $c->collect(new Request(), new Response());
         $c = unserialize(serialize($c));
@@ -135,25 +135,25 @@ class DoctrineDataCollectorTest extends TestCase
 
     public function paramProvider()
     {
-        $tests = array(
-            array('some value', array(), 'some value', true),
-            array(1, array(), 1, true),
-            array(true, array(), true, true),
-            array(null, array(), null, true),
-            array(new \DateTime('2011-09-11'), array('date'), '2011-09-11', true),
-            array(fopen(__FILE__, 'r'), array(), '/* Resource(stream) */', false),
-            array(new \stdClass(), array(), '/* Object(stdClass) */', false),
-            array(
+        $tests = [
+            ['some value', [], 'some value', true],
+            [1, [], 1, true],
+            [true, [], true, true],
+            [null, [], null, true],
+            [new \DateTime('2011-09-11'), ['date'], '2011-09-11', true],
+            [fopen(__FILE__, 'r'), [], '/* Resource(stream) */', false],
+            [new \stdClass(), [], '/* Object(stdClass) */', false],
+            [
                 new StringRepresentableClass(),
-                array(),
+                [],
                 '/* Object(Symfony\Bridge\Doctrine\Tests\DataCollector\StringRepresentableClass): */"string representation"',
                 false,
-            ),
-        );
+            ],
+        ];
 
         if (version_compare(Version::VERSION, '2.6', '>=')) {
-            $tests[] = array('this is not a date', array('date'), 'this is not a date', false);
-            $tests[] = array(new \stdClass(), array('date'), '/* Object(stdClass) */', false);
+            $tests[] = ['this is not a date', ['date'], 'this is not a date', false];
+            $tests[] = [new \stdClass(), ['date'], '/* Object(stdClass) */', false];
         }
 
         return $tests;
@@ -172,11 +172,11 @@ class DoctrineDataCollectorTest extends TestCase
         $registry
             ->expects($this->any())
             ->method('getConnectionNames')
-            ->will($this->returnValue(array('default' => 'doctrine.dbal.default_connection')));
+            ->will($this->returnValue(['default' => 'doctrine.dbal.default_connection']));
         $registry
             ->expects($this->any())
             ->method('getManagerNames')
-            ->will($this->returnValue(array('default' => 'doctrine.orm.default_entity_manager')));
+            ->will($this->returnValue(['default' => 'doctrine.orm.default_entity_manager']));
         $registry->expects($this->any())
             ->method('getConnection')
             ->will($this->returnValue($connection));
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
index dfdfecc094..ca75437b76 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterEventListenersAndSubscribersPassTest.php
@@ -46,7 +46,7 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
 
         $abstractDefinition = new Definition('stdClass');
         $abstractDefinition->setAbstract(true);
-        $abstractDefinition->addTag('doctrine.event_listener', array('event' => 'test'));
+        $abstractDefinition->addTag('doctrine.event_listener', ['event' => 'test']);
 
         $container->setDefinition('a', $abstractDefinition);
 
@@ -60,30 +60,30 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
         $container
             ->register('a', 'stdClass')
             ->setPublic(false)
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'bar',
-            ))
-            ->addTag('doctrine.event_listener', array(
+            ])
+            ->addTag('doctrine.event_listener', [
                 'event' => 'foo',
                 'priority' => -5,
-            ))
-            ->addTag('doctrine.event_listener', array(
+            ])
+            ->addTag('doctrine.event_listener', [
                 'event' => 'foo_bar',
                 'priority' => 3,
-            ))
+            ])
         ;
         $container
             ->register('b', 'stdClass')
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'foo',
-            ))
+            ])
         ;
         $container
             ->register('c', 'stdClass')
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'foo_bar',
                 'priority' => 4,
-            ))
+            ])
         ;
 
         $this->process($container);
@@ -91,24 +91,24 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
         $methodCalls = $eventManagerDef->getMethodCalls();
 
         $this->assertEquals(
-            array(
-                array('addEventListener', array(array('foo_bar'), 'c')),
-                array('addEventListener', array(array('foo_bar'), 'a')),
-                array('addEventListener', array(array('bar'), 'a')),
-                array('addEventListener', array(array('foo'), 'b')),
-                array('addEventListener', array(array('foo'), 'a')),
-            ),
+            [
+                ['addEventListener', [['foo_bar'], 'c']],
+                ['addEventListener', [['foo_bar'], 'a']],
+                ['addEventListener', [['bar'], 'a']],
+                ['addEventListener', [['foo'], 'b']],
+                ['addEventListener', [['foo'], 'a']],
+            ],
             $methodCalls
         );
 
         $serviceLocatorDef = $container->getDefinition((string) $eventManagerDef->getArgument(0));
         $this->assertSame(ServiceLocator::class, $serviceLocatorDef->getClass());
         $this->assertEquals(
-            array(
+            [
                 'c' => new ServiceClosureArgument(new Reference('c')),
                 'a' => new ServiceClosureArgument(new Reference('a')),
                 'b' => new ServiceClosureArgument(new Reference('b')),
-            ),
+            ],
             $serviceLocatorDef->getArgument(0)
         );
     }
@@ -119,25 +119,25 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
 
         $container
             ->register('a', 'stdClass')
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'onFlush',
-            ))
+            ])
         ;
 
         $container
             ->register('b', 'stdClass')
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'onFlush',
                 'connection' => 'default',
-            ))
+            ])
         ;
 
         $container
             ->register('c', 'stdClass')
-            ->addTag('doctrine.event_listener', array(
+            ->addTag('doctrine.event_listener', [
                 'event' => 'onFlush',
                 'connection' => 'second',
-            ))
+            ])
         ;
 
         $this->process($container);
@@ -146,40 +146,40 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
 
         // first connection
         $this->assertEquals(
-            array(
-                array('addEventListener', array(array('onFlush'), 'a')),
-                array('addEventListener', array(array('onFlush'), 'b')),
-            ),
+            [
+                ['addEventListener', [['onFlush'], 'a']],
+                ['addEventListener', [['onFlush'], 'b']],
+            ],
             $eventManagerDef->getMethodCalls()
         );
 
         $serviceLocatorDef = $container->getDefinition((string) $eventManagerDef->getArgument(0));
         $this->assertSame(ServiceLocator::class, $serviceLocatorDef->getClass());
         $this->assertEquals(
-            array(
+            [
                 'a' => new ServiceClosureArgument(new Reference('a')),
                 'b' => new ServiceClosureArgument(new Reference('b')),
-            ),
+            ],
             $serviceLocatorDef->getArgument(0)
         );
 
         // second connection
         $secondEventManagerDef = $container->getDefinition('doctrine.dbal.second_connection.event_manager');
         $this->assertEquals(
-            array(
-                array('addEventListener', array(array('onFlush'), 'a')),
-                array('addEventListener', array(array('onFlush'), 'c')),
-            ),
+            [
+                ['addEventListener', [['onFlush'], 'a']],
+                ['addEventListener', [['onFlush'], 'c']],
+            ],
             $secondEventManagerDef->getMethodCalls()
         );
 
         $serviceLocatorDef = $container->getDefinition((string) $secondEventManagerDef->getArgument(0));
         $this->assertSame(ServiceLocator::class, $serviceLocatorDef->getClass());
         $this->assertEquals(
-            array(
+            [
                 'a' => new ServiceClosureArgument(new Reference('a')),
                 'c' => new ServiceClosureArgument(new Reference('c')),
-            ),
+            ],
             $serviceLocatorDef->getArgument(0)
         );
     }
@@ -190,42 +190,42 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
 
         $container
             ->register('a', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'event' => 'onFlush',
-            ))
+            ])
         ;
 
         $container
             ->register('b', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'event' => 'onFlush',
                 'connection' => 'default',
-            ))
+            ])
         ;
 
         $container
             ->register('c', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'event' => 'onFlush',
                 'connection' => 'second',
-            ))
+            ])
         ;
 
         $this->process($container);
 
         $this->assertEquals(
-            array(
-                array('addEventSubscriber', array(new Reference('a'))),
-                array('addEventSubscriber', array(new Reference('b'))),
-            ),
+            [
+                ['addEventSubscriber', [new Reference('a')]],
+                ['addEventSubscriber', [new Reference('b')]],
+            ],
             $container->getDefinition('doctrine.dbal.default_connection.event_manager')->getMethodCalls()
         );
 
         $this->assertEquals(
-            array(
-                array('addEventSubscriber', array(new Reference('a'))),
-                array('addEventSubscriber', array(new Reference('c'))),
-            ),
+            [
+                ['addEventSubscriber', [new Reference('a')]],
+                ['addEventSubscriber', [new Reference('c')]],
+            ],
             $container->getDefinition('doctrine.dbal.second_connection.event_manager')->getMethodCalls()
         );
     }
@@ -240,39 +240,39 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
         ;
         $container
             ->register('b', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'priority' => 5,
-            ))
+            ])
         ;
         $container
             ->register('c', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'priority' => 10,
-            ))
+            ])
         ;
         $container
             ->register('d', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'priority' => 10,
-            ))
+            ])
         ;
         $container
             ->register('e', 'stdClass')
-            ->addTag('doctrine.event_subscriber', array(
+            ->addTag('doctrine.event_subscriber', [
                 'priority' => 10,
-            ))
+            ])
         ;
 
         $this->process($container);
 
         $this->assertEquals(
-            array(
-                array('addEventSubscriber', array(new Reference('c'))),
-                array('addEventSubscriber', array(new Reference('d'))),
-                array('addEventSubscriber', array(new Reference('e'))),
-                array('addEventSubscriber', array(new Reference('b'))),
-                array('addEventSubscriber', array(new Reference('a'))),
-            ),
+            [
+                ['addEventSubscriber', [new Reference('c')]],
+                ['addEventSubscriber', [new Reference('d')]],
+                ['addEventSubscriber', [new Reference('e')]],
+                ['addEventSubscriber', [new Reference('b')]],
+                ['addEventSubscriber', [new Reference('a')]],
+            ],
             $container->getDefinition('doctrine.dbal.default_connection.event_manager')->getMethodCalls()
         );
     }
@@ -283,9 +283,9 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
 
         $this->process($container);
 
-        $this->assertEquals(array(), $container->getDefinition('doctrine.dbal.default_connection.event_manager')->getMethodCalls());
+        $this->assertEquals([], $container->getDefinition('doctrine.dbal.default_connection.event_manager')->getMethodCalls());
 
-        $this->assertEquals(array(), $container->getDefinition('doctrine.dbal.second_connection.event_manager')->getMethodCalls());
+        $this->assertEquals([], $container->getDefinition('doctrine.dbal.second_connection.event_manager')->getMethodCalls());
     }
 
     private function process(ContainerBuilder $container)
@@ -298,7 +298,7 @@ class RegisterEventListenersAndSubscribersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $connections = array('default' => 'doctrine.dbal.default_connection');
+        $connections = ['default' => 'doctrine.dbal.default_connection'];
 
         $container->register('doctrine.dbal.default_connection.event_manager', 'stdClass')
             ->addArgument(new Reference('service_container'));
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterMappingsPassTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterMappingsPassTest.php
index 90dd145592..0bb2642a76 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterMappingsPassTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/CompilerPass/RegisterMappingsPassTest.php
@@ -16,17 +16,17 @@ class RegisterMappingsPassTest extends TestCase
     public function testNoDriverParmeterException()
     {
         $container = $this->createBuilder();
-        $this->process($container, array(
+        $this->process($container, [
             'manager.param.one',
             'manager.param.two',
-        ));
+        ]);
     }
 
     private function process(ContainerBuilder $container, array $managerParamNames)
     {
         $pass = new ConcreteMappingsPass(
             new Definition('\stdClass'),
-            array(),
+            [],
             $managerParamNames,
             'some.%s.metadata_driver'
         );
diff --git a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
index cc99e4f5f6..638e47ef3d 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/DependencyInjection/DoctrineExtensionTest.php
@@ -32,13 +32,13 @@ class DoctrineExtensionTest extends TestCase
 
         $this->extension = $this
             ->getMockBuilder('Symfony\Bridge\Doctrine\DependencyInjection\AbstractDoctrineExtension')
-            ->setMethods(array(
+            ->setMethods([
                 'getMappingResourceConfigDirectory',
                 'getObjectManagerElementName',
                 'getMappingObjectDefaultName',
                 'getMappingResourceExtension',
                 'load',
-            ))
+            ])
             ->getMock()
         ;
 
@@ -54,19 +54,19 @@ class DoctrineExtensionTest extends TestCase
      */
     public function testFixManagersAutoMappingsWithTwoAutomappings()
     {
-        $emConfigs = array(
-            'em1' => array(
+        $emConfigs = [
+            'em1' => [
                 'auto_mapping' => true,
-            ),
-            'em2' => array(
+            ],
+            'em2' => [
                 'auto_mapping' => true,
-            ),
-        );
+            ],
+        ];
 
-        $bundles = array(
+        $bundles = [
             'FirstBundle' => 'My\FirstBundle',
             'SecondBundle' => 'My\SecondBundle',
-        );
+        ];
 
         $reflection = new \ReflectionClass(\get_class($this->extension));
         $method = $reflection->getMethod('fixManagersAutoMappings');
@@ -77,69 +77,69 @@ class DoctrineExtensionTest extends TestCase
 
     public function getAutomappingData()
     {
-        return array(
-            array(
-                array( // no auto mapping on em1
+        return [
+            [
+                [ // no auto mapping on em1
                     'auto_mapping' => false,
-                ),
-                array( // no auto mapping on em2
+                ],
+                [ // no auto mapping on em2
                     'auto_mapping' => false,
-                ),
-                array(),
-                array(),
-            ),
-            array(
-                array( // no auto mapping on em1
+                ],
+                [],
+                [],
+            ],
+            [
+                [ // no auto mapping on em1
                     'auto_mapping' => false,
-                ),
-                array( // auto mapping enabled on em2
+                ],
+                [ // auto mapping enabled on em2
                     'auto_mapping' => true,
-                ),
-                array(),
-                array(
-                    'mappings' => array(
-                        'FirstBundle' => array(
+                ],
+                [],
+                [
+                    'mappings' => [
+                        'FirstBundle' => [
                             'mapping' => true,
                             'is_bundle' => true,
-                        ),
-                        'SecondBundle' => array(
+                        ],
+                        'SecondBundle' => [
                             'mapping' => true,
                             'is_bundle' => true,
-                        ),
-                    ),
-                ),
-            ),
-            array(
-                array( // no auto mapping on em1, but it defines SecondBundle as own
+                        ],
+                    ],
+                ],
+            ],
+            [
+                [ // no auto mapping on em1, but it defines SecondBundle as own
                     'auto_mapping' => false,
-                    'mappings' => array(
-                        'SecondBundle' => array(
+                    'mappings' => [
+                        'SecondBundle' => [
                             'mapping' => true,
                             'is_bundle' => true,
-                        ),
-                    ),
-                ),
-                array( // auto mapping enabled on em2
+                        ],
+                    ],
+                ],
+                [ // auto mapping enabled on em2
                     'auto_mapping' => true,
-                ),
-                array(
-                    'mappings' => array(
-                        'SecondBundle' => array(
+                ],
+                [
+                    'mappings' => [
+                        'SecondBundle' => [
                             'mapping' => true,
                             'is_bundle' => true,
-                        ),
-                    ),
-                ),
-                array(
-                    'mappings' => array(
-                        'FirstBundle' => array(
+                        ],
+                    ],
+                ],
+                [
+                    'mappings' => [
+                        'FirstBundle' => [
                             'mapping' => true,
                             'is_bundle' => true,
-                        ),
-                    ),
-                ),
-            ),
-        );
+                        ],
+                    ],
+                ],
+            ],
+        ];
     }
 
     /**
@@ -147,15 +147,15 @@ class DoctrineExtensionTest extends TestCase
      */
     public function testFixManagersAutoMappings(array $originalEm1, array $originalEm2, array $expectedEm1, array $expectedEm2)
     {
-        $emConfigs = array(
+        $emConfigs = [
             'em1' => $originalEm1,
             'em2' => $originalEm2,
-        );
+        ];
 
-        $bundles = array(
+        $bundles = [
             'FirstBundle' => 'My\FirstBundle',
             'SecondBundle' => 'My\SecondBundle',
-        );
+        ];
 
         $reflection = new \ReflectionClass(\get_class($this->extension));
         $method = $reflection->getMethod('fixManagersAutoMappings');
@@ -163,39 +163,39 @@ class DoctrineExtensionTest extends TestCase
 
         $newEmConfigs = $method->invoke($this->extension, $emConfigs, $bundles);
 
-        $this->assertEquals($newEmConfigs['em1'], array_merge(array(
+        $this->assertEquals($newEmConfigs['em1'], array_merge([
             'auto_mapping' => false,
-        ), $expectedEm1));
-        $this->assertEquals($newEmConfigs['em2'], array_merge(array(
+        ], $expectedEm1));
+        $this->assertEquals($newEmConfigs['em2'], array_merge([
             'auto_mapping' => false,
-        ), $expectedEm2));
+        ], $expectedEm2));
     }
 
     public function providerBasicDrivers()
     {
-        return array(
-            array('doctrine.orm.cache.apc.class',       array('type' => 'apc')),
-            array('doctrine.orm.cache.apcu.class',      array('type' => 'apcu')),
-            array('doctrine.orm.cache.array.class',     array('type' => 'array')),
-            array('doctrine.orm.cache.xcache.class',    array('type' => 'xcache')),
-            array('doctrine.orm.cache.wincache.class',  array('type' => 'wincache')),
-            array('doctrine.orm.cache.zenddata.class',  array('type' => 'zenddata')),
-            array('doctrine.orm.cache.redis.class',     array('type' => 'redis'),     array('setRedis')),
-            array('doctrine.orm.cache.memcached.class', array('type' => 'memcached'), array('setMemcached')),
-        );
+        return [
+            ['doctrine.orm.cache.apc.class',       ['type' => 'apc']],
+            ['doctrine.orm.cache.apcu.class',      ['type' => 'apcu']],
+            ['doctrine.orm.cache.array.class',     ['type' => 'array']],
+            ['doctrine.orm.cache.xcache.class',    ['type' => 'xcache']],
+            ['doctrine.orm.cache.wincache.class',  ['type' => 'wincache']],
+            ['doctrine.orm.cache.zenddata.class',  ['type' => 'zenddata']],
+            ['doctrine.orm.cache.redis.class',     ['type' => 'redis'],     ['setRedis']],
+            ['doctrine.orm.cache.memcached.class', ['type' => 'memcached'], ['setMemcached']],
+        ];
     }
 
     /**
      * @dataProvider providerBasicDrivers
      */
-    public function testLoadBasicCacheDriver(string $class, array $config, array $expectedCalls = array())
+    public function testLoadBasicCacheDriver(string $class, array $config, array $expectedCalls = [])
     {
         $container = $this->createContainer();
         $cacheName = 'metadata_cache';
-        $objectManager = array(
+        $objectManager = [
             'name' => 'default',
             'metadata_cache_driver' => $config,
-        );
+        ];
 
         $this->invokeLoadCacheDriver($objectManager, $container, $cacheName);
 
@@ -219,13 +219,13 @@ class DoctrineExtensionTest extends TestCase
         $cacheName = 'metadata_cache';
         $container = $this->createContainer();
         $definition = new Definition('%doctrine.orm.cache.apc.class%');
-        $objectManager = array(
+        $objectManager = [
             'name' => 'default',
-            'metadata_cache_driver' => array(
+            'metadata_cache_driver' => [
                 'type' => 'service',
                 'id' => 'service_driver',
-            ),
-        );
+            ],
+        ];
 
         $container->setDefinition('service_driver', $definition);
 
@@ -242,12 +242,12 @@ class DoctrineExtensionTest extends TestCase
     {
         $cacheName = 'metadata_cache';
         $container = $this->createContainer();
-        $objectManager = array(
+        $objectManager = [
             'name' => 'default',
-            'metadata_cache_driver' => array(
+            'metadata_cache_driver' => [
                 'type' => 'unrecognized_type',
-            ),
-        );
+            ],
+        ];
 
         $this->invokeLoadCacheDriver($objectManager, $container, $cacheName);
     }
@@ -258,19 +258,19 @@ class DoctrineExtensionTest extends TestCase
 
         $method->setAccessible(true);
 
-        $method->invokeArgs($this->extension, array($objectManager, $container, $cacheName));
+        $method->invokeArgs($this->extension, [$objectManager, $container, $cacheName]);
     }
 
     /**
      * @return \Symfony\Component\DependencyInjection\ContainerBuilder
      */
-    protected function createContainer(array $data = array())
+    protected function createContainer(array $data = [])
     {
-        return new ContainerBuilder(new ParameterBag(array_merge(array(
-            'kernel.bundles' => array('FrameworkBundle' => 'Symfony\\Bundle\\FrameworkBundle\\FrameworkBundle'),
+        return new ContainerBuilder(new ParameterBag(array_merge([
+            'kernel.bundles' => ['FrameworkBundle' => 'Symfony\\Bundle\\FrameworkBundle\\FrameworkBundle'],
             'kernel.cache_dir' => __DIR__,
             'kernel.container_class' => 'kernel',
             'kernel.project_dir' => __DIR__,
-        ), $data)));
+        ], $data)));
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Fixtures/SingleIntIdEntity.php b/src/Symfony/Bridge/Doctrine/Tests/Fixtures/SingleIntIdEntity.php
index d98b0ef93a..ff29145e33 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Fixtures/SingleIntIdEntity.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Fixtures/SingleIntIdEntity.php
@@ -25,7 +25,7 @@ class SingleIntIdEntity
     public $name;
 
     /** @Column(type="array", nullable=true) */
-    public $phoneNumbers = array();
+    public $phoneNumbers = [];
 
     public function __construct($id, $name)
     {
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
index b24a374fed..de6f3a3aa9 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/DoctrineChoiceLoaderTest.php
@@ -81,9 +81,9 @@ class DoctrineChoiceLoaderTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
         $this->objectLoader = $this->getMockBuilder('Symfony\Bridge\Doctrine\Form\ChoiceList\EntityLoaderInterface')->getMock();
-        $this->obj1 = (object) array('name' => 'A');
-        $this->obj2 = (object) array('name' => 'B');
-        $this->obj3 = (object) array('name' => 'C');
+        $this->obj1 = (object) ['name' => 'A'];
+        $this->obj2 = (object) ['name' => 'B'];
+        $this->obj3 = (object) ['name' => 'C'];
 
         $this->om->expects($this->any())
             ->method('getRepository')
@@ -104,7 +104,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
         $value = function () {};
         $choiceList = new ArrayChoiceList($choices, $value);
 
@@ -128,7 +128,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->objectLoader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
         $choiceList = new ArrayChoiceList($choices);
 
         $this->repository->expects($this->never())
@@ -153,17 +153,17 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
 
         $this->repository->expects($this->once())
             ->method('findAll')
             ->willReturn($choices);
 
-        $this->assertSame(array('1', '2'), $loader->loadValuesForChoices(array($this->obj2, $this->obj3)));
+        $this->assertSame(['1', '2'], $loader->loadValuesForChoices([$this->obj2, $this->obj3]));
 
         // no further loads on subsequent calls
 
-        $this->assertSame(array('1', '2'), $loader->loadValuesForChoices(array($this->obj2, $this->obj3)));
+        $this->assertSame(['1', '2'], $loader->loadValuesForChoices([$this->obj2, $this->obj3]));
     }
 
     public function testLoadValuesForChoicesDoesNotLoadIfEmptyChoices()
@@ -177,7 +177,7 @@ class DoctrineChoiceLoaderTest extends TestCase
         $this->repository->expects($this->never())
             ->method('findAll');
 
-        $this->assertSame(array(), $loader->loadValuesForChoices(array()));
+        $this->assertSame([], $loader->loadValuesForChoices([]));
     }
 
     public function testLoadValuesForChoicesDoesNotLoadIfSingleIntId()
@@ -200,7 +200,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             ->with($this->obj2)
             ->willReturn('2');
 
-        $this->assertSame(array('2'), $loader->loadValuesForChoices(array($this->obj2)));
+        $this->assertSame(['2'], $loader->loadValuesForChoices([$this->obj2]));
     }
 
     public function testLoadValuesForChoicesLoadsIfSingleIntIdAndValueGiven()
@@ -211,7 +211,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
         $value = function (\stdClass $object) { return $object->name; };
 
         $this->idReader->expects($this->any())
@@ -222,8 +222,8 @@ class DoctrineChoiceLoaderTest extends TestCase
             ->method('findAll')
             ->willReturn($choices);
 
-        $this->assertSame(array('B'), $loader->loadValuesForChoices(
-            array($this->obj2),
+        $this->assertSame(['B'], $loader->loadValuesForChoices(
+            [$this->obj2],
             $value
         ));
     }
@@ -236,7 +236,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $value = array($this->idReader, 'getIdValue');
+        $value = [$this->idReader, 'getIdValue'];
 
         $this->idReader->expects($this->any())
             ->method('isSingleId')
@@ -250,8 +250,8 @@ class DoctrineChoiceLoaderTest extends TestCase
             ->with($this->obj2)
             ->willReturn('2');
 
-        $this->assertSame(array('2'), $loader->loadValuesForChoices(
-            array($this->obj2),
+        $this->assertSame(['2'], $loader->loadValuesForChoices(
+            [$this->obj2],
             $value
         ));
     }
@@ -264,17 +264,17 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
 
         $this->repository->expects($this->once())
             ->method('findAll')
             ->willReturn($choices);
 
-        $this->assertSame(array($this->obj2, $this->obj3), $loader->loadChoicesForValues(array('1', '2')));
+        $this->assertSame([$this->obj2, $this->obj3], $loader->loadChoicesForValues(['1', '2']));
 
         // no further loads on subsequent calls
 
-        $this->assertSame(array($this->obj2, $this->obj3), $loader->loadChoicesForValues(array('1', '2')));
+        $this->assertSame([$this->obj2, $this->obj3], $loader->loadChoicesForValues(['1', '2']));
     }
 
     public function testLoadChoicesForValuesDoesNotLoadIfEmptyValues()
@@ -288,7 +288,7 @@ class DoctrineChoiceLoaderTest extends TestCase
         $this->repository->expects($this->never())
             ->method('findAll');
 
-        $this->assertSame(array(), $loader->loadChoicesForValues(array()));
+        $this->assertSame([], $loader->loadChoicesForValues([]));
     }
 
     public function testLoadChoicesForValuesLoadsOnlyChoicesIfSingleIntId()
@@ -300,7 +300,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->objectLoader
         );
 
-        $choices = array($this->obj2, $this->obj3);
+        $choices = [$this->obj2, $this->obj3];
 
         $this->idReader->expects($this->any())
             ->method('isSingleId')
@@ -315,19 +315,19 @@ class DoctrineChoiceLoaderTest extends TestCase
 
         $this->objectLoader->expects($this->once())
             ->method('getEntitiesByIds')
-            ->with('idField', array(4 => '3', 7 => '2'))
+            ->with('idField', [4 => '3', 7 => '2'])
             ->willReturn($choices);
 
         $this->idReader->expects($this->any())
             ->method('getIdValue')
-            ->willReturnMap(array(
-                array($this->obj2, '2'),
-                array($this->obj3, '3'),
-            ));
+            ->willReturnMap([
+                [$this->obj2, '2'],
+                [$this->obj3, '3'],
+            ]);
 
         $this->assertSame(
-            array(4 => $this->obj3, 7 => $this->obj2),
-            $loader->loadChoicesForValues(array(4 => '3', 7 => '2')
+            [4 => $this->obj3, 7 => $this->obj2],
+            $loader->loadChoicesForValues([4 => '3', 7 => '2']
         ));
     }
 
@@ -339,7 +339,7 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->idReader
         );
 
-        $choices = array($this->obj1, $this->obj2, $this->obj3);
+        $choices = [$this->obj1, $this->obj2, $this->obj3];
         $value = function (\stdClass $object) { return $object->name; };
 
         $this->idReader->expects($this->any())
@@ -350,8 +350,8 @@ class DoctrineChoiceLoaderTest extends TestCase
             ->method('findAll')
             ->willReturn($choices);
 
-        $this->assertSame(array($this->obj2), $loader->loadChoicesForValues(
-            array('B'),
+        $this->assertSame([$this->obj2], $loader->loadChoicesForValues(
+            ['B'],
             $value
         ));
     }
@@ -365,8 +365,8 @@ class DoctrineChoiceLoaderTest extends TestCase
             $this->objectLoader
         );
 
-        $choices = array($this->obj2, $this->obj3);
-        $value = array($this->idReader, 'getIdValue');
+        $choices = [$this->obj2, $this->obj3];
+        $value = [$this->idReader, 'getIdValue'];
 
         $this->idReader->expects($this->any())
             ->method('isSingleId')
@@ -381,16 +381,16 @@ class DoctrineChoiceLoaderTest extends TestCase
 
         $this->objectLoader->expects($this->once())
             ->method('getEntitiesByIds')
-            ->with('idField', array('2'))
+            ->with('idField', ['2'])
             ->willReturn($choices);
 
         $this->idReader->expects($this->any())
             ->method('getIdValue')
-            ->willReturnMap(array(
-                array($this->obj2, '2'),
-                array($this->obj3, '3'),
-            ));
+            ->willReturnMap([
+                [$this->obj2, '2'],
+                [$this->obj3, '3'],
+            ]);
 
-        $this->assertSame(array($this->obj2), $loader->loadChoicesForValues(array('2'), $value));
+        $this->assertSame([$this->obj2], $loader->loadChoicesForValues(['2'], $value));
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
index 211cb12e4d..3abdb3578a 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/ChoiceList/ORMQueryBuilderLoaderTest.php
@@ -34,17 +34,17 @@ class ORMQueryBuilderLoaderTest extends TestCase
         $em = DoctrineTestHelper::createTestEntityManager();
 
         $query = $this->getMockBuilder('QueryMock')
-            ->setMethods(array('setParameter', 'getResult', 'getSql', '_doExecute'))
+            ->setMethods(['setParameter', 'getResult', 'getSql', '_doExecute'])
             ->getMock();
 
         $query->expects($this->once())
             ->method('setParameter')
-            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', array(1, 2), $expectedType)
+            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', [1, 2], $expectedType)
             ->willReturn($query);
 
         $qb = $this->getMockBuilder('Doctrine\ORM\QueryBuilder')
-            ->setConstructorArgs(array($em))
-            ->setMethods(array('getQuery'))
+            ->setConstructorArgs([$em])
+            ->setMethods(['getQuery'])
             ->getMock();
 
         $qb->expects($this->once())
@@ -55,7 +55,7 @@ class ORMQueryBuilderLoaderTest extends TestCase
             ->from($classname, 'e');
 
         $loader = new ORMQueryBuilderLoader($qb);
-        $loader->getEntitiesByIds('id', array(1, 2));
+        $loader->getEntitiesByIds('id', [1, 2]);
     }
 
     public function testFilterNonIntegerValues()
@@ -63,17 +63,17 @@ class ORMQueryBuilderLoaderTest extends TestCase
         $em = DoctrineTestHelper::createTestEntityManager();
 
         $query = $this->getMockBuilder('QueryMock')
-            ->setMethods(array('setParameter', 'getResult', 'getSql', '_doExecute'))
+            ->setMethods(['setParameter', 'getResult', 'getSql', '_doExecute'])
             ->getMock();
 
         $query->expects($this->once())
             ->method('setParameter')
-            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', array(1, 2, 3, '9223372036854775808'), Connection::PARAM_INT_ARRAY)
+            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', [1, 2, 3, '9223372036854775808'], Connection::PARAM_INT_ARRAY)
             ->willReturn($query);
 
         $qb = $this->getMockBuilder('Doctrine\ORM\QueryBuilder')
-            ->setConstructorArgs(array($em))
-            ->setMethods(array('getQuery'))
+            ->setConstructorArgs([$em])
+            ->setMethods(['getQuery'])
             ->getMock();
 
         $qb->expects($this->once())
@@ -84,7 +84,7 @@ class ORMQueryBuilderLoaderTest extends TestCase
             ->from('Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdEntity', 'e');
 
         $loader = new ORMQueryBuilderLoader($qb);
-        $loader->getEntitiesByIds('id', array(1, '', 2, 3, 'foo', '9223372036854775808'));
+        $loader->getEntitiesByIds('id', [1, '', 2, 3, 'foo', '9223372036854775808']);
     }
 
     /**
@@ -95,17 +95,17 @@ class ORMQueryBuilderLoaderTest extends TestCase
         $em = DoctrineTestHelper::createTestEntityManager();
 
         $query = $this->getMockBuilder('QueryMock')
-            ->setMethods(array('setParameter', 'getResult', 'getSql', '_doExecute'))
+            ->setMethods(['setParameter', 'getResult', 'getSql', '_doExecute'])
             ->getMock();
 
         $query->expects($this->once())
             ->method('setParameter')
-            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', array('71c5fd46-3f16-4abb-bad7-90ac1e654a2d', 'b98e8e11-2897-44df-ad24-d2627eb7f499'), Connection::PARAM_STR_ARRAY)
+            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id', ['71c5fd46-3f16-4abb-bad7-90ac1e654a2d', 'b98e8e11-2897-44df-ad24-d2627eb7f499'], Connection::PARAM_STR_ARRAY)
             ->willReturn($query);
 
         $qb = $this->getMockBuilder('Doctrine\ORM\QueryBuilder')
-            ->setConstructorArgs(array($em))
-            ->setMethods(array('getQuery'))
+            ->setConstructorArgs([$em])
+            ->setMethods(['getQuery'])
             ->getMock();
 
         $qb->expects($this->once())
@@ -116,7 +116,7 @@ class ORMQueryBuilderLoaderTest extends TestCase
             ->from($entityClass, 'e');
 
         $loader = new ORMQueryBuilderLoader($qb);
-        $loader->getEntitiesByIds('id', array('71c5fd46-3f16-4abb-bad7-90ac1e654a2d', '', 'b98e8e11-2897-44df-ad24-d2627eb7f499'));
+        $loader->getEntitiesByIds('id', ['71c5fd46-3f16-4abb-bad7-90ac1e654a2d', '', 'b98e8e11-2897-44df-ad24-d2627eb7f499']);
     }
 
     public function testEmbeddedIdentifierName()
@@ -130,17 +130,17 @@ class ORMQueryBuilderLoaderTest extends TestCase
         $em = DoctrineTestHelper::createTestEntityManager();
 
         $query = $this->getMockBuilder('QueryMock')
-            ->setMethods(array('setParameter', 'getResult', 'getSql', '_doExecute'))
+            ->setMethods(['setParameter', 'getResult', 'getSql', '_doExecute'])
             ->getMock();
 
         $query->expects($this->once())
             ->method('setParameter')
-            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id_value', array(1, 2, 3), Connection::PARAM_INT_ARRAY)
+            ->with('ORMQueryBuilderLoader_getEntitiesByIds_id_value', [1, 2, 3], Connection::PARAM_INT_ARRAY)
             ->willReturn($query);
 
         $qb = $this->getMockBuilder('Doctrine\ORM\QueryBuilder')
-            ->setConstructorArgs(array($em))
-            ->setMethods(array('getQuery'))
+            ->setConstructorArgs([$em])
+            ->setMethods(['getQuery'])
             ->getMock();
         $qb->expects($this->once())
             ->method('getQuery')
@@ -150,14 +150,14 @@ class ORMQueryBuilderLoaderTest extends TestCase
             ->from('Symfony\Bridge\Doctrine\Tests\Fixtures\EmbeddedIdentifierEntity', 'e');
 
         $loader = new ORMQueryBuilderLoader($qb);
-        $loader->getEntitiesByIds('id.value', array(1, '', 2, 3, 'foo'));
+        $loader->getEntitiesByIds('id.value', [1, '', 2, 3, 'foo']);
     }
 
     public function provideGuidEntityClasses()
     {
-        return array(
-            array('Symfony\Bridge\Doctrine\Tests\Fixtures\GuidIdEntity'),
-            array('Symfony\Bridge\Doctrine\Tests\Fixtures\UuidIdEntity'),
-        );
+        return [
+            ['Symfony\Bridge\Doctrine\Tests\Fixtures\GuidIdEntity'],
+            ['Symfony\Bridge\Doctrine\Tests\Fixtures\UuidIdEntity'],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
index fa3ff911ad..e6e85f4d3f 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/DataTransformer/CollectionToArrayTransformerTest.php
@@ -32,10 +32,10 @@ class CollectionToArrayTransformerTest extends TestCase
 
     public function testTransform()
     {
-        $array = array(
+        $array = [
             2 => 'foo',
             3 => 'bar',
-        );
+        ];
 
         $this->assertSame($array, $this->transformer->transform(new ArrayCollection($array)));
     }
@@ -49,17 +49,17 @@ class CollectionToArrayTransformerTest extends TestCase
      */
     public function testTransformArray()
     {
-        $array = array(
+        $array = [
             2 => 'foo',
             3 => 'bar',
-        );
+        ];
 
         $this->assertSame($array, $this->transformer->transform($array));
     }
 
     public function testTransformNull()
     {
-        $this->assertSame(array(), $this->transformer->transform(null));
+        $this->assertSame([], $this->transformer->transform(null));
     }
 
     /**
@@ -72,10 +72,10 @@ class CollectionToArrayTransformerTest extends TestCase
 
     public function testReverseTransform()
     {
-        $array = array(
+        $array = [
             2 => 'foo',
             3 => 'bar',
-        );
+        ];
 
         $this->assertEquals(new ArrayCollection($array), $this->transformer->reverseTransform($array));
     }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
index 0eda4a3ba6..c323385ff1 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/DoctrineOrmTypeGuesserTest.php
@@ -29,54 +29,54 @@ class DoctrineOrmTypeGuesserTest extends TestCase
 
     public function requiredProvider()
     {
-        $return = array();
+        $return = [];
 
         // Simple field, not nullable
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->fieldMappings['field'] = true;
         $classMetadata->expects($this->once())->method('isNullable')->with('field')->will($this->returnValue(false));
 
-        $return[] = array($classMetadata, new ValueGuess(true, Guess::HIGH_CONFIDENCE));
+        $return[] = [$classMetadata, new ValueGuess(true, Guess::HIGH_CONFIDENCE)];
 
         // Simple field, nullable
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->fieldMappings['field'] = true;
         $classMetadata->expects($this->once())->method('isNullable')->with('field')->will($this->returnValue(true));
 
-        $return[] = array($classMetadata, new ValueGuess(false, Guess::MEDIUM_CONFIDENCE));
+        $return[] = [$classMetadata, new ValueGuess(false, Guess::MEDIUM_CONFIDENCE)];
 
         // One-to-one, nullable (by default)
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->expects($this->once())->method('isAssociationWithSingleJoinColumn')->with('field')->will($this->returnValue(true));
 
-        $mapping = array('joinColumns' => array(array()));
+        $mapping = ['joinColumns' => [[]]];
         $classMetadata->expects($this->once())->method('getAssociationMapping')->with('field')->will($this->returnValue($mapping));
 
-        $return[] = array($classMetadata, new ValueGuess(false, Guess::HIGH_CONFIDENCE));
+        $return[] = [$classMetadata, new ValueGuess(false, Guess::HIGH_CONFIDENCE)];
 
         // One-to-one, nullable (explicit)
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->expects($this->once())->method('isAssociationWithSingleJoinColumn')->with('field')->will($this->returnValue(true));
 
-        $mapping = array('joinColumns' => array(array('nullable' => true)));
+        $mapping = ['joinColumns' => [['nullable' => true]]];
         $classMetadata->expects($this->once())->method('getAssociationMapping')->with('field')->will($this->returnValue($mapping));
 
-        $return[] = array($classMetadata, new ValueGuess(false, Guess::HIGH_CONFIDENCE));
+        $return[] = [$classMetadata, new ValueGuess(false, Guess::HIGH_CONFIDENCE)];
 
         // One-to-one, not nullable
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->expects($this->once())->method('isAssociationWithSingleJoinColumn')->with('field')->will($this->returnValue(true));
 
-        $mapping = array('joinColumns' => array(array('nullable' => false)));
+        $mapping = ['joinColumns' => [['nullable' => false]]];
         $classMetadata->expects($this->once())->method('getAssociationMapping')->with('field')->will($this->returnValue($mapping));
 
-        $return[] = array($classMetadata, new ValueGuess(true, Guess::HIGH_CONFIDENCE));
+        $return[] = [$classMetadata, new ValueGuess(true, Guess::HIGH_CONFIDENCE)];
 
         // One-to-many, no clue
         $classMetadata = $this->getMockBuilder('Doctrine\ORM\Mapping\ClassMetadata')->disableOriginalConstructor()->getMock();
         $classMetadata->expects($this->once())->method('isAssociationWithSingleJoinColumn')->with('field')->will($this->returnValue(false));
 
-        $return[] = array($classMetadata, null);
+        $return[] = [$classMetadata, null];
 
         return $return;
     }
@@ -87,7 +87,7 @@ class DoctrineOrmTypeGuesserTest extends TestCase
         $em->expects($this->once())->method('getClassMetaData')->with('TestEntity')->will($this->returnValue($classMetadata));
 
         $registry = $this->getMockBuilder('Doctrine\Common\Persistence\ManagerRegistry')->getMock();
-        $registry->expects($this->once())->method('getManagers')->will($this->returnValue(array($em)));
+        $registry->expects($this->once())->method('getManagers')->will($this->returnValue([$em]));
 
         return new DoctrineOrmTypeGuesser($registry);
     }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/EventListener/MergeDoctrineCollectionListenerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/EventListener/MergeDoctrineCollectionListenerTest.php
index 52ea54dfef..4565374645 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/EventListener/MergeDoctrineCollectionListenerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/EventListener/MergeDoctrineCollectionListenerTest.php
@@ -30,7 +30,7 @@ class MergeDoctrineCollectionListenerTest extends TestCase
 
     protected function setUp()
     {
-        $this->collection = new ArrayCollection(array('test'));
+        $this->collection = new ArrayCollection(['test']);
         $this->dispatcher = new EventDispatcher();
         $this->factory = $this->getMockBuilder('Symfony\Component\Form\FormFactoryInterface')->getMock();
         $this->form = $this->getBuilder()
@@ -60,7 +60,7 @@ class MergeDoctrineCollectionListenerTest extends TestCase
 
     public function testOnSubmitDoNothing()
     {
-        $submittedData = array('test');
+        $submittedData = ['test'];
         $event = new FormEvent($this->getForm(), $submittedData);
 
         $this->dispatcher->dispatch(FormEvents::SUBMIT, $event);
@@ -71,7 +71,7 @@ class MergeDoctrineCollectionListenerTest extends TestCase
 
     public function testOnSubmitNullClearCollection()
     {
-        $submittedData = array();
+        $submittedData = [];
         $event = new FormEvent($this->getForm(), $submittedData);
 
         $this->dispatcher->dispatch(FormEvents::SUBMIT, $event);
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
index f4f7effa61..afdeb5f720 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypePerformanceTest.php
@@ -42,10 +42,10 @@ class EntityTypePerformanceTest extends FormPerformanceTestCase
             ->method('getManagerForClass')
             ->will($this->returnValue($this->em));
 
-        return array(
+        return [
             new CoreExtension(),
             new DoctrineOrmExtension($manager),
-        );
+        ];
     }
 
     protected function setUp()
@@ -55,9 +55,9 @@ class EntityTypePerformanceTest extends FormPerformanceTestCase
         parent::setUp();
 
         $schemaTool = new SchemaTool($this->em);
-        $classes = array(
+        $classes = [
             $this->em->getClassMetadata(self::ENTITY_CLASS),
-        );
+        ];
 
         try {
             $schemaTool->dropSchema($classes);
@@ -90,9 +90,9 @@ class EntityTypePerformanceTest extends FormPerformanceTestCase
         $this->setMaxRunningTime(1);
 
         for ($i = 0; $i < 40; ++$i) {
-            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
+            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, [
                 'class' => self::ENTITY_CLASS,
-            ));
+            ]);
 
             // force loading of the choice list
             $form->createView();
@@ -108,10 +108,10 @@ class EntityTypePerformanceTest extends FormPerformanceTestCase
         $this->setMaxRunningTime(1);
 
         for ($i = 0; $i < 40; ++$i) {
-            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
+            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, [
                 'class' => self::ENTITY_CLASS,
                 'choices' => $choices,
-            ));
+            ]);
 
             // force loading of the choice list
             $form->createView();
@@ -127,10 +127,10 @@ class EntityTypePerformanceTest extends FormPerformanceTestCase
         $this->setMaxRunningTime(1);
 
         for ($i = 0; $i < 40; ++$i) {
-            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, array(
+            $form = $this->factory->create('Symfony\Bridge\Doctrine\Form\Type\EntityType', null, [
                     'class' => self::ENTITY_CLASS,
                     'preferred_choices' => $choices,
-                ));
+                ]);
 
             // force loading of the choice list
             $form->createView();
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypeTest.php b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypeTest.php
index d60992fcf1..2869c2b804 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypeTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Form/Type/EntityTypeTest.php
@@ -65,7 +65,7 @@ class EntityTypeTest extends BaseTypeTest
         parent::setUp();
 
         $schemaTool = new SchemaTool($this->em);
-        $classes = array(
+        $classes = [
             $this->em->getClassMetadata(self::ITEM_GROUP_CLASS),
             $this->em->getClassMetadata(self::SINGLE_IDENT_CLASS),
             $this->em->getClassMetadata(self::SINGLE_IDENT_NO_TO_STRING_CLASS),
@@ -74,7 +74,7 @@ class EntityTypeTest extends BaseTypeTest
             $this->em->getClassMetadata(self::SINGLE_STRING_CASTABLE_IDENT_CLASS),
             $this->em->getClassMetadata(self::COMPOSITE_IDENT_CLASS),
             $this->em->getClassMetadata(self::COMPOSITE_STRING_IDENT_CLASS),
-        );
+        ];
 
         try {
             $schemaTool->dropSchema($classes);
@@ -97,9 +97,9 @@ class EntityTypeTest extends BaseTypeTest
 
     protected function getExtensions()
     {
-        return array_merge(parent::getExtensions(), array(
+        return array_merge(parent::getExtensions(), [
             new DoctrineOrmExtension($this->emRegistry),
-        ));
+        ]);
     }
 
     protected function persist(array $entities)
@@ -126,9 +126,9 @@ class EntityTypeTest extends BaseTypeTest
      */
     public function testInvalidClassOption()
     {
-        $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'class' => 'foo',
-        ));
+        ]);
     }
 
     public function testSetDataToUninitializedEntityWithNonRequired()
@@ -136,16 +136,16 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'required' => false,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')), $field->createView()->vars['choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')], $field->createView()->vars['choices']);
     }
 
     public function testSetDataToUninitializedEntityWithNonRequiredToString()
@@ -153,16 +153,16 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'required' => false,
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')), $view->vars['choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')], $view->vars['choices']);
     }
 
     public function testSetDataToUninitializedEntityWithNonRequiredQueryBuilder()
@@ -170,19 +170,19 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
         $qb = $this->em->createQueryBuilder()->select('e')->from(self::SINGLE_IDENT_CLASS, 'e');
 
-        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'required' => false,
             'choice_label' => 'name',
             'query_builder' => $qb,
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')), $view->vars['choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')], $view->vars['choices']);
     }
 
     /**
@@ -190,11 +190,11 @@ class EntityTypeTest extends BaseTypeTest
      */
     public function testConfigureQueryBuilderWithNonQueryBuilderAndNonClosure()
     {
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => new \stdClass(),
-        ));
+        ]);
     }
 
     /**
@@ -202,13 +202,13 @@ class EntityTypeTest extends BaseTypeTest
      */
     public function testConfigureQueryBuilderWithClosureReturningNonQueryBuilder()
     {
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function () {
                 return new \stdClass();
             },
-        ));
+        ]);
 
         $field->submit('2');
     }
@@ -218,26 +218,26 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function () {
                 return;
             },
-        ));
+        ]);
 
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')), $field->createView()->vars['choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')], $field->createView()->vars['choices']);
     }
 
     public function testSetDataSingleNull()
     {
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
         $field->setData(null);
 
         $this->assertNull($field->getData());
@@ -246,30 +246,30 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testSetDataMultipleExpandedNull()
     {
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
         $field->setData(null);
 
         $this->assertNull($field->getData());
-        $this->assertSame(array(), $field->getViewData());
+        $this->assertSame([], $field->getViewData());
     }
 
     public function testSetDataMultipleNonExpandedNull()
     {
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
         $field->setData(null);
 
         $this->assertNull($field->getData());
-        $this->assertSame(array(), $field->getViewData());
+        $this->assertSame([], $field->getViewData());
     }
 
     public function testSubmitSingleNonExpandedSingleIdentifier()
@@ -277,15 +277,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -302,15 +302,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleAssociationToIntIdEntity($innerEntity1, 'Foo');
         $entity2 = new SingleAssociationToIntIdEntity($innerEntity2, 'Bar');
 
-        $this->persist(array($innerEntity1, $innerEntity2, $entity1, $entity2));
+        $this->persist([$innerEntity1, $innerEntity2, $entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_ASSOC_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -324,15 +324,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new CompositeIntIdEntity(10, 20, 'Foo');
         $entity2 = new CompositeIntIdEntity(30, 40, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::COMPOSITE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         // the collection key is used here
         $field->submit('1');
@@ -348,23 +348,23 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
-        $this->assertSame(array('1', '3'), $field->getViewData());
+        $this->assertSame(['1', '3'], $field->getViewData());
     }
 
     public function testSubmitMultipleNonExpandedSingleAssocIdentifier()
@@ -377,23 +377,23 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleAssociationToIntIdEntity($innerEntity2, 'Bar');
         $entity3 = new SingleAssociationToIntIdEntity($innerEntity3, 'Baz');
 
-        $this->persist(array($innerEntity1, $innerEntity2, $innerEntity3, $entity1, $entity2, $entity3));
+        $this->persist([$innerEntity1, $innerEntity2, $innerEntity3, $entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_ASSOC_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
-        $this->assertSame(array('1', '3'), $field->getViewData());
+        $this->assertSame(['1', '3'], $field->getViewData());
     }
 
     public function testSubmitMultipleNonExpandedSingleIdentifierForExistingData()
@@ -402,29 +402,29 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $existing = new ArrayCollection(array(0 => $entity2));
+        $existing = new ArrayCollection([0 => $entity2]);
 
         $field->setData($existing);
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
         // entry with index 0 ($entity2) was replaced
-        $expected = new ArrayCollection(array(0 => $entity1, 1 => $entity3));
+        $expected = new ArrayCollection([0 => $entity1, 1 => $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
         // same object still, useful if it is a PersistentCollection
         $this->assertSame($existing, $field->getData());
-        $this->assertSame(array('1', '3'), $field->getViewData());
+        $this->assertSame(['1', '3'], $field->getViewData());
     }
 
     public function testSubmitMultipleNonExpandedCompositeIdentifier()
@@ -433,24 +433,24 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new CompositeIntIdEntity(30, 40, 'Bar');
         $entity3 = new CompositeIntIdEntity(50, 60, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::COMPOSITE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         // because of the composite key collection keys are used
-        $field->submit(array('0', '2'));
+        $field->submit(['0', '2']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
-        $this->assertSame(array('0', '2'), $field->getViewData());
+        $this->assertSame(['0', '2'], $field->getViewData());
     }
 
     public function testSubmitMultipleNonExpandedCompositeIdentifierExistingData()
@@ -459,29 +459,29 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new CompositeIntIdEntity(30, 40, 'Bar');
         $entity3 = new CompositeIntIdEntity(50, 60, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::COMPOSITE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $existing = new ArrayCollection(array(0 => $entity2));
+        $existing = new ArrayCollection([0 => $entity2]);
 
         $field->setData($existing);
-        $field->submit(array('0', '2'));
+        $field->submit(['0', '2']);
 
         // entry with index 0 ($entity2) was replaced
-        $expected = new ArrayCollection(array(0 => $entity1, 1 => $entity3));
+        $expected = new ArrayCollection([0 => $entity1, 1 => $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
         // same object still, useful if it is a PersistentCollection
         $this->assertSame($existing, $field->getData());
-        $this->assertSame(array('0', '2'), $field->getViewData());
+        $this->assertSame(['0', '2'], $field->getViewData());
     }
 
     public function testSubmitSingleExpanded()
@@ -489,15 +489,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -515,19 +515,19 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Bar');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
@@ -544,19 +544,19 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(-1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('-1'));
+        $field->submit(['-1']);
 
-        $expected = new ArrayCollection(array($entity1));
+        $expected = new ArrayCollection([$entity1]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
@@ -569,15 +569,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleStringCastableIdEntity(1, 'Foo');
         $entity2 = new SingleStringCastableIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_STRING_CASTABLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -591,15 +591,15 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleStringCastableIdEntity(1, 'Foo');
         $entity2 = new SingleStringCastableIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_STRING_CASTABLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -617,29 +617,29 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleStringCastableIdEntity(2, 'Bar');
         $entity3 = new SingleStringCastableIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_STRING_CASTABLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $existing = new ArrayCollection(array(0 => $entity2));
+        $existing = new ArrayCollection([0 => $entity2]);
 
         $field->setData($existing);
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
         // entry with index 0 ($entity2) was replaced
-        $expected = new ArrayCollection(array(0 => $entity1, 1 => $entity3));
+        $expected = new ArrayCollection([0 => $entity1, 1 => $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
         // same object still, useful if it is a PersistentCollection
         $this->assertSame($existing, $field->getData());
-        $this->assertSame(array('1', '3'), $field->getViewData());
+        $this->assertSame(['1', '3'], $field->getViewData());
     }
 
     public function testSubmitMultipleNonExpandedStringCastableIdentifier()
@@ -648,23 +648,23 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleStringCastableIdEntity(2, 'Bar');
         $entity3 = new SingleStringCastableIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_STRING_CASTABLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
-        $this->assertSame(array('1', '3'), $field->getViewData());
+        $this->assertSame(['1', '3'], $field->getViewData());
     }
 
     public function testSubmitMultipleStringCastableIdentifierExpanded()
@@ -673,19 +673,19 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleStringCastableIdEntity(2, 'Bar');
         $entity3 = new SingleStringCastableIdEntity(3, 'Bar');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'em' => 'default',
             'class' => self::SINGLE_STRING_CASTABLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $field->submit(array('1', '3'));
+        $field->submit(['1', '3']);
 
-        $expected = new ArrayCollection(array($entity1, $entity3));
+        $expected = new ArrayCollection([$entity1, $entity3]);
 
         $this->assertTrue($field->isSynchronized());
         $this->assertEquals($expected, $field->getData());
@@ -703,19 +703,19 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             // not all persisted entities should be displayed
-            'choices' => array($entity1, $entity2),
+            'choices' => [$entity1, $entity2],
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')), $field->createView()->vars['choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo'), 2 => new ChoiceView($entity2, '2', 'Bar')], $field->createView()->vars['choices']);
         $this->assertTrue($field->isSynchronized());
         $this->assertSame($entity2, $field->getData());
         $this->assertSame('2', $field->getViewData());
@@ -726,18 +726,18 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
             'choice_value' => 'name',
-        ));
+        ]);
 
         $field->submit('Bar');
 
-        $this->assertEquals(array('Foo' => new ChoiceView($entity1, 'Foo', 'Foo'), 'Bar' => new ChoiceView($entity2, 'Bar', 'Bar')), $field->createView()->vars['choices']);
+        $this->assertEquals(['Foo' => new ChoiceView($entity1, 'Foo', 'Foo'), 'Bar' => new ChoiceView($entity2, 'Bar', 'Bar')], $field->createView()->vars['choices']);
         $this->assertTrue($field->isSynchronized(), 'Field should be synchronized.');
         $this->assertSame($entity2, $field->getData(), 'Entity should be loaded by custom value.');
         $this->assertSame('Bar', $field->getViewData());
@@ -748,9 +748,9 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new GroupableEntity(1, 'Foo', 'BazGroup');
         $entity2 = new GroupableEntity(2, 'Bar', 'BooGroup');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::ITEM_GROUP_CLASS,
             'choice_label' => 'name',
@@ -761,14 +761,14 @@ class EntityTypeTest extends BaseTypeTest
 
                 return $entity->groupName.'/'.$entity->name;
             },
-        ));
+        ]);
 
         $field->submit('BooGroup/Bar');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'BazGroup/Foo' => new ChoiceView($entity1, 'BazGroup/Foo', 'Foo'),
             'BooGroup/Bar' => new ChoiceView($entity2, 'BooGroup/Bar', 'Bar'),
-            ), $field->createView()->vars['choices']);
+            ], $field->createView()->vars['choices']);
         $this->assertTrue($field->isSynchronized(), 'Field should be synchronized.');
         $this->assertSame($entity2, $field->getData(), 'Entity should be loaded by custom value.');
         $this->assertSame('BooGroup/Bar', $field->getViewData());
@@ -779,13 +779,13 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Bar');
 
-        $this->persist(array($entity1, $entity2));
+        $this->persist([$entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $this->em->clear();
 
@@ -805,29 +805,29 @@ class EntityTypeTest extends BaseTypeTest
         $item3 = new GroupableEntity(3, 'Baz', 'Group2');
         $item4 = new GroupableEntity(4, 'Boo!', null);
 
-        $this->persist(array($item1, $item2, $item3, $item4));
+        $this->persist([$item1, $item2, $item3, $item4]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::ITEM_GROUP_CLASS,
-            'choices' => array($item1, $item2, $item3, $item4),
+            'choices' => [$item1, $item2, $item3, $item4],
             'choice_label' => 'name',
             'group_by' => 'groupName',
-        ));
+        ]);
 
         $field->submit('2');
 
         $this->assertSame('2', $field->getViewData());
-        $this->assertEquals(array(
-            'Group1' => new ChoiceGroupView('Group1', array(
+        $this->assertEquals([
+            'Group1' => new ChoiceGroupView('Group1', [
                 1 => new ChoiceView($item1, '1', 'Foo'),
                 2 => new ChoiceView($item2, '2', 'Bar'),
-            )),
-            'Group2' => new ChoiceGroupView('Group2', array(
+            ]),
+            'Group2' => new ChoiceGroupView('Group2', [
                 3 => new ChoiceView($item3, '3', 'Baz'),
-            )),
+            ]),
             4 => new ChoiceView($item4, '4', 'Boo!'),
-        ), $field->createView()->vars['choices']);
+        ], $field->createView()->vars['choices']);
     }
 
     public function testPreferredChoices()
@@ -836,17 +836,17 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-            'preferred_choices' => array($entity3, $entity2),
+            'preferred_choices' => [$entity3, $entity2],
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $this->assertEquals(array(3 => new ChoiceView($entity3, '3', 'Baz'), 2 => new ChoiceView($entity2, '2', 'Bar')), $field->createView()->vars['preferred_choices']);
-        $this->assertEquals(array(1 => new ChoiceView($entity1, '1', 'Foo')), $field->createView()->vars['choices']);
+        $this->assertEquals([3 => new ChoiceView($entity3, '3', 'Baz'), 2 => new ChoiceView($entity2, '2', 'Bar')], $field->createView()->vars['preferred_choices']);
+        $this->assertEquals([1 => new ChoiceView($entity1, '1', 'Foo')], $field->createView()->vars['choices']);
     }
 
     public function testOverrideChoicesWithPreferredChoices()
@@ -855,18 +855,18 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-            'choices' => array($entity2, $entity3),
-            'preferred_choices' => array($entity3),
+            'choices' => [$entity2, $entity3],
+            'preferred_choices' => [$entity3],
             'choice_label' => 'name',
-        ));
+        ]);
 
-        $this->assertEquals(array(3 => new ChoiceView($entity3, '3', 'Baz')), $field->createView()->vars['preferred_choices']);
-        $this->assertEquals(array(2 => new ChoiceView($entity2, '2', 'Bar')), $field->createView()->vars['choices']);
+        $this->assertEquals([3 => new ChoiceView($entity3, '3', 'Baz')], $field->createView()->vars['preferred_choices']);
+        $this->assertEquals([2 => new ChoiceView($entity2, '2', 'Bar')], $field->createView()->vars['choices']);
     }
 
     public function testDisallowChoicesThatAreNotIncludedChoicesSingleIdentifier()
@@ -875,14 +875,14 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-            'choices' => array($entity1, $entity2),
+            'choices' => [$entity1, $entity2],
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('3');
 
@@ -898,14 +898,14 @@ class EntityTypeTest extends BaseTypeTest
         $entity1 = new SingleAssociationToIntIdEntity($innerEntity1, 'Foo');
         $entity2 = new SingleAssociationToIntIdEntity($innerEntity2, 'Bar');
 
-        $this->persist(array($innerEntity1, $innerEntity2, $entity1, $entity2));
+        $this->persist([$innerEntity1, $innerEntity2, $entity1, $entity2]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_ASSOC_IDENT_CLASS,
-            'choices' => array($entity1, $entity2),
+            'choices' => [$entity1, $entity2],
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('3');
 
@@ -919,14 +919,14 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new CompositeIntIdEntity(30, 40, 'Bar');
         $entity3 = new CompositeIntIdEntity(50, 60, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::COMPOSITE_IDENT_CLASS,
-            'choices' => array($entity1, $entity2),
+            'choices' => [$entity1, $entity2],
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -940,17 +940,17 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
         $repository = $this->em->getRepository(self::SINGLE_IDENT_CLASS);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => $repository->createQueryBuilder('e')
                 ->where('e.id IN (1, 2)'),
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('3');
 
@@ -968,17 +968,17 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleAssociationToIntIdEntity($innerEntity2, 'Bar');
         $entity3 = new SingleAssociationToIntIdEntity($innerEntity3, 'Baz');
 
-        $this->persist(array($innerEntity1, $innerEntity2, $innerEntity3, $entity1, $entity2, $entity3));
+        $this->persist([$innerEntity1, $innerEntity2, $innerEntity3, $entity1, $entity2, $entity3]);
 
         $repository = $this->em->getRepository(self::SINGLE_ASSOC_IDENT_CLASS);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_ASSOC_IDENT_CLASS,
             'query_builder' => $repository->createQueryBuilder('e')
                 ->where('e.entity IN (1, 2)'),
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('3');
 
@@ -992,9 +992,9 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repository) {
@@ -1002,7 +1002,7 @@ class EntityTypeTest extends BaseTypeTest
                     ->where('e.id IN (1, 2)');
             },
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('3');
 
@@ -1016,9 +1016,9 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new CompositeIntIdEntity(30, 40, 'Bar');
         $entity3 = new CompositeIntIdEntity(50, 60, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::COMPOSITE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repository) {
@@ -1026,7 +1026,7 @@ class EntityTypeTest extends BaseTypeTest
                     ->where('e.id1 IN (10, 50)');
             },
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('2');
 
@@ -1038,15 +1038,15 @@ class EntityTypeTest extends BaseTypeTest
     {
         $entity1 = new SingleStringIdEntity('foo', 'Foo');
 
-        $this->persist(array($entity1));
+        $this->persist([$entity1]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::SINGLE_STRING_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         $field->submit('foo');
 
@@ -1059,15 +1059,15 @@ class EntityTypeTest extends BaseTypeTest
     {
         $entity1 = new CompositeStringIdEntity('foo1', 'foo2', 'Foo');
 
-        $this->persist(array($entity1));
+        $this->persist([$entity1]);
 
-        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $field = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'em' => 'default',
             'class' => self::COMPOSITE_STRING_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
 
         // the collection key is used here
         $field->submit('0');
@@ -1087,11 +1087,11 @@ class EntityTypeTest extends BaseTypeTest
             ->with(self::SINGLE_IDENT_CLASS)
             ->will($this->returnValue($this->em));
 
-        $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'class' => self::SINGLE_IDENT_CLASS,
             'required' => false,
             'choice_label' => 'name',
-        ));
+        ]);
     }
 
     public function testExplicitEm()
@@ -1102,11 +1102,11 @@ class EntityTypeTest extends BaseTypeTest
         $this->emRegistry->expects($this->never())
             ->method('getManagerForClass');
 
-        $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => $this->em,
             'class' => self::SINGLE_IDENT_CLASS,
             'choice_label' => 'name',
-        ));
+        ]);
     }
 
     public function testLoaderCaching()
@@ -1115,7 +1115,7 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
         $repo = $this->em->getRepository(self::SINGLE_IDENT_CLASS);
 
@@ -1130,35 +1130,35 @@ class EntityTypeTest extends BaseTypeTest
 
         $formBuilder = $factory->createNamedBuilder('form', FormTypeTest::TESTED_TYPE);
 
-        $formBuilder->add('property1', static::TESTED_TYPE, array(
+        $formBuilder->add('property1', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => $repo->createQueryBuilder('e')->where('e.id IN (1, 2)'),
-        ));
+        ]);
 
-        $formBuilder->add('property2', static::TESTED_TYPE, array(
+        $formBuilder->add('property2', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repo) {
                 return $repo->createQueryBuilder('e')->where('e.id IN (1, 2)');
             },
-        ));
+        ]);
 
-        $formBuilder->add('property3', static::TESTED_TYPE, array(
+        $formBuilder->add('property3', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repo) {
                 return $repo->createQueryBuilder('e')->where('e.id IN (1, 2)');
             },
-        ));
+        ]);
 
         $form = $formBuilder->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'property1' => 1,
             'property2' => 1,
             'property3' => 2,
-        ));
+        ]);
 
         $choiceLoader1 = $form->get('property1')->getConfig()->getOption('choice_loader');
         $choiceLoader2 = $form->get('property2')->getConfig()->getOption('choice_loader');
@@ -1175,7 +1175,7 @@ class EntityTypeTest extends BaseTypeTest
         $entity2 = new SingleIntIdEntity(2, 'Bar');
         $entity3 = new SingleIntIdEntity(3, 'Baz');
 
-        $this->persist(array($entity1, $entity2, $entity3));
+        $this->persist([$entity1, $entity2, $entity3]);
 
         $repo = $this->em->getRepository(self::SINGLE_IDENT_CLASS);
 
@@ -1190,35 +1190,35 @@ class EntityTypeTest extends BaseTypeTest
 
         $formBuilder = $factory->createNamedBuilder('form', FormTypeTest::TESTED_TYPE);
 
-        $formBuilder->add('property1', static::TESTED_TYPE, array(
+        $formBuilder->add('property1', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => $repo->createQueryBuilder('e')->where('e.id = :id')->setParameter('id', 1),
-        ));
+        ]);
 
-        $formBuilder->add('property2', static::TESTED_TYPE, array(
+        $formBuilder->add('property2', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repo) {
                 return $repo->createQueryBuilder('e')->where('e.id = :id')->setParameter('id', 1);
             },
-        ));
+        ]);
 
-        $formBuilder->add('property3', static::TESTED_TYPE, array(
+        $formBuilder->add('property3', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'query_builder' => function (EntityRepository $repo) {
                 return $repo->createQueryBuilder('e')->where('e.id = :id')->setParameter('id', 1);
             },
-        ));
+        ]);
 
         $form = $formBuilder->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'property1' => 1,
             'property2' => 1,
             'property3' => 2,
-        ));
+        ]);
 
         $choiceLoader1 = $form->get('property1')->getConfig()->getOption('choice_loader');
         $choiceLoader2 = $form->get('property2')->getConfig()->getOption('choice_loader');
@@ -1242,21 +1242,21 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testPassDisabledAsOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'disabled' => true,
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
 
         $this->assertTrue($form->isDisabled());
     }
 
     public function testPassIdAndNameToView()
     {
-        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('name', $view->vars['id']);
@@ -1266,10 +1266,10 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testStripLeadingUnderscoresAndDigitsFromId()
     {
-        $view = $this->factory->createNamed('_09name', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('_09name', static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('name', $view->vars['id']);
@@ -1280,10 +1280,10 @@ class EntityTypeTest extends BaseTypeTest
     public function testPassIdAndNameToViewWithParent()
     {
         $view = $this->factory->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE)
-            ->add('child', static::TESTED_TYPE, array(
+            ->add('child', static::TESTED_TYPE, [
                 'em' => 'default',
                 'class' => self::SINGLE_IDENT_CLASS,
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -1296,10 +1296,10 @@ class EntityTypeTest extends BaseTypeTest
     {
         $builder = $this->factory->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE)
             ->add('child', FormTypeTest::TESTED_TYPE);
-        $builder->get('child')->add('grand_child', static::TESTED_TYPE, array(
+        $builder->get('child')->add('grand_child', static::TESTED_TYPE, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
         $view = $builder->getForm()->createView();
 
         $this->assertEquals('parent_child_grand_child', $view['child']['grand_child']->vars['id']);
@@ -1309,11 +1309,11 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testPassTranslationDomainToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'translation_domain' => 'domain',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('domain', $view->vars['translation_domain']);
@@ -1322,13 +1322,13 @@ class EntityTypeTest extends BaseTypeTest
     public function testInheritTranslationDomainFromParent()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'domain',
-            ))
-            ->add('child', static::TESTED_TYPE, array(
+            ])
+            ->add('child', static::TESTED_TYPE, [
                 'em' => 'default',
                 'class' => self::SINGLE_IDENT_CLASS,
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -1338,14 +1338,14 @@ class EntityTypeTest extends BaseTypeTest
     public function testPreferOwnTranslationDomain()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'parent_domain',
-            ))
-            ->add('child', static::TESTED_TYPE, array(
+            ])
+            ->add('child', static::TESTED_TYPE, [
                 'em' => 'default',
                 'class' => self::SINGLE_IDENT_CLASS,
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -1356,10 +1356,10 @@ class EntityTypeTest extends BaseTypeTest
     {
         $view = $this->factory
             ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE)
-            ->add('child', static::TESTED_TYPE, array(
+            ->add('child', static::TESTED_TYPE, [
                 'em' => 'default',
                 'class' => self::SINGLE_IDENT_CLASS,
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -1368,11 +1368,11 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testPassLabelToView()
     {
-        $view = $this->factory->createNamed('__test___field', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('__test___field', static::TESTED_TYPE, null, [
             'label' => 'My label',
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('My label', $view->vars['label']);
@@ -1380,10 +1380,10 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testPassMultipartFalseToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ))
+        ])
             ->createView();
 
         $this->assertFalse($view->vars['multipart']);
@@ -1391,10 +1391,10 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertNull($form->getData());
@@ -1404,11 +1404,11 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testSubmitNullExpanded()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'expanded' => true,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertNull($form->getData());
@@ -1418,82 +1418,82 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testSubmitNullMultiple()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'multiple' => true,
-        ));
+        ]);
         $form->submit(null);
 
         $collection = new ArrayCollection();
 
         $this->assertEquals($collection, $form->getData());
         $this->assertEquals($collection, $form->getNormData());
-        $this->assertSame(array(), $form->getViewData(), 'View data is always an array');
+        $this->assertSame([], $form->getViewData(), 'View data is always an array');
     }
 
     public function testSubmitNullExpandedMultiple()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'expanded' => true,
             'multiple' => true,
-        ));
+        ]);
         $form->submit(null);
 
         $collection = new ArrayCollection();
 
         $this->assertEquals($collection, $form->getData());
         $this->assertEquals($collection, $form->getNormData());
-        $this->assertSame(array(), $form->getViewData(), 'View data is always an array');
+        $this->assertSame([], $form->getViewData(), 'View data is always an array');
     }
 
     public function testSetDataEmptyArraySubmitNullMultiple()
     {
-        $emptyArray = array();
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $emptyArray = [];
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'multiple' => true,
-        ));
+        ]);
         $form->setData($emptyArray);
         $form->submit(null);
         $this->assertInternalType('array', $form->getData());
-        $this->assertEquals(array(), $form->getData());
-        $this->assertEquals(array(), $form->getNormData());
-        $this->assertSame(array(), $form->getViewData(), 'View data is always an array');
+        $this->assertEquals([], $form->getData());
+        $this->assertEquals([], $form->getNormData());
+        $this->assertSame([], $form->getViewData(), 'View data is always an array');
     }
 
     public function testSetDataNonEmptyArraySubmitNullMultiple()
     {
         $entity1 = new SingleIntIdEntity(1, 'Foo');
-        $this->persist(array($entity1));
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->persist([$entity1]);
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'multiple' => true,
-        ));
-        $existing = array(0 => $entity1);
+        ]);
+        $existing = [0 => $entity1];
         $form->setData($existing);
         $form->submit(null);
         $this->assertInternalType('array', $form->getData());
-        $this->assertEquals(array(), $form->getData());
-        $this->assertEquals(array(), $form->getNormData());
-        $this->assertSame(array(), $form->getViewData(), 'View data is always an array');
+        $this->assertEquals([], $form->getData());
+        $this->assertEquals([], $form->getNormData());
+        $this->assertSame([], $form->getViewData(), 'View data is always an array');
     }
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'empty', $expectedData = null)
     {
         $emptyData = '1';
         $entity1 = new SingleIntIdEntity(1, 'Foo');
-        $this->persist(array($entity1));
+        $this->persist([$entity1]);
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -1503,19 +1503,19 @@ class EntityTypeTest extends BaseTypeTest
 
     public function testSubmitNullMultipleUsesDefaultEmptyData()
     {
-        $emptyData = array('1');
+        $emptyData = ['1'];
         $entity1 = new SingleIntIdEntity(1, 'Foo');
-        $this->persist(array($entity1));
+        $this->persist([$entity1]);
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'em' => 'default',
             'class' => self::SINGLE_IDENT_CLASS,
             'multiple' => true,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
-        $collection = new ArrayCollection(array($entity1));
+        $collection = new ArrayCollection([$entity1]);
 
         $this->assertSame($emptyData, $form->getViewData());
         $this->assertEquals($collection, $form->getNormData());
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
index 38bbed1294..10c403f461 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Logger/DbalLoggerTest.php
@@ -25,8 +25,8 @@ class DbalLoggerTest extends TestCase
 
         $dbalLogger = $this
             ->getMockBuilder('Symfony\\Bridge\\Doctrine\\Logger\\DbalLogger')
-            ->setConstructorArgs(array($logger, null))
-            ->setMethods(array('log'))
+            ->setConstructorArgs([$logger, null])
+            ->setMethods(['log'])
             ->getMock()
         ;
 
@@ -41,14 +41,14 @@ class DbalLoggerTest extends TestCase
 
     public function getLogFixtures()
     {
-        return array(
-            array('SQL', null, array()),
-            array('SQL', array(), array()),
-            array('SQL', array('foo' => 'bar'), array('foo' => 'bar')),
-            array('SQL', array('foo' => "\x7F\xFF"), array('foo' => DbalLogger::BINARY_DATA_VALUE)),
-            array('SQL', array('foo' => "bar\x7F\xFF"), array('foo' => DbalLogger::BINARY_DATA_VALUE)),
-            array('SQL', array('foo' => ''), array('foo' => '')),
-        );
+        return [
+            ['SQL', null, []],
+            ['SQL', [], []],
+            ['SQL', ['foo' => 'bar'], ['foo' => 'bar']],
+            ['SQL', ['foo' => "\x7F\xFF"], ['foo' => DbalLogger::BINARY_DATA_VALUE]],
+            ['SQL', ['foo' => "bar\x7F\xFF"], ['foo' => DbalLogger::BINARY_DATA_VALUE]],
+            ['SQL', ['foo' => ''], ['foo' => '']],
+        ];
     }
 
     public function testLogNonUtf8()
@@ -57,21 +57,21 @@ class DbalLoggerTest extends TestCase
 
         $dbalLogger = $this
             ->getMockBuilder('Symfony\\Bridge\\Doctrine\\Logger\\DbalLogger')
-            ->setConstructorArgs(array($logger, null))
-            ->setMethods(array('log'))
+            ->setConstructorArgs([$logger, null])
+            ->setMethods(['log'])
             ->getMock()
         ;
 
         $dbalLogger
             ->expects($this->once())
             ->method('log')
-            ->with('SQL', array('utf8' => 'foo', 'nonutf8' => DbalLogger::BINARY_DATA_VALUE))
+            ->with('SQL', ['utf8' => 'foo', 'nonutf8' => DbalLogger::BINARY_DATA_VALUE])
         ;
 
-        $dbalLogger->startQuery('SQL', array(
+        $dbalLogger->startQuery('SQL', [
             'utf8' => 'foo',
             'nonutf8' => "\x7F\xFF",
-        ));
+        ]);
     }
 
     public function testLogNonUtf8Array()
@@ -80,29 +80,29 @@ class DbalLoggerTest extends TestCase
 
         $dbalLogger = $this
             ->getMockBuilder('Symfony\\Bridge\\Doctrine\\Logger\\DbalLogger')
-            ->setConstructorArgs(array($logger, null))
-            ->setMethods(array('log'))
+            ->setConstructorArgs([$logger, null])
+            ->setMethods(['log'])
             ->getMock()
         ;
 
         $dbalLogger
             ->expects($this->once())
             ->method('log')
-            ->with('SQL', array(
+            ->with('SQL', [
                     'utf8' => 'foo',
-                    array(
+                    [
                         'nonutf8' => DbalLogger::BINARY_DATA_VALUE,
-                    ),
-                )
+                    ],
+                ]
             )
         ;
 
-        $dbalLogger->startQuery('SQL', array(
+        $dbalLogger->startQuery('SQL', [
             'utf8' => 'foo',
-            array(
+            [
                 'nonutf8' => "\x7F\xFF",
-            ),
-        ));
+            ],
+        ]);
     }
 
     public function testLogLongString()
@@ -111,8 +111,8 @@ class DbalLoggerTest extends TestCase
 
         $dbalLogger = $this
             ->getMockBuilder('Symfony\\Bridge\\Doctrine\\Logger\\DbalLogger')
-            ->setConstructorArgs(array($logger, null))
-            ->setMethods(array('log'))
+            ->setConstructorArgs([$logger, null])
+            ->setMethods(['log'])
             ->getMock()
         ;
 
@@ -124,13 +124,13 @@ class DbalLoggerTest extends TestCase
         $dbalLogger
             ->expects($this->once())
             ->method('log')
-            ->with('SQL', array('short' => $shortString, 'long' => substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6).' [...]'))
+            ->with('SQL', ['short' => $shortString, 'long' => substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6).' [...]'])
         ;
 
-        $dbalLogger->startQuery('SQL', array(
+        $dbalLogger->startQuery('SQL', [
             'short' => $shortString,
             'long' => $longString,
-        ));
+        ]);
     }
 
     public function testLogUTF8LongString()
@@ -139,12 +139,12 @@ class DbalLoggerTest extends TestCase
 
         $dbalLogger = $this
             ->getMockBuilder('Symfony\\Bridge\\Doctrine\\Logger\\DbalLogger')
-            ->setConstructorArgs(array($logger, null))
-            ->setMethods(array('log'))
+            ->setConstructorArgs([$logger, null])
+            ->setMethods(['log'])
             ->getMock()
         ;
 
-        $testStringArray = array('é', 'á', 'ű', 'ő', 'ú', 'ö', 'ü', 'ó', 'í');
+        $testStringArray = ['é', 'á', 'ű', 'ő', 'ú', 'ö', 'ü', 'ó', 'í'];
         $testStringCount = \count($testStringArray);
 
         $shortString = '';
@@ -158,12 +158,12 @@ class DbalLoggerTest extends TestCase
         $dbalLogger
             ->expects($this->once())
             ->method('log')
-            ->with('SQL', array('short' => $shortString, 'long' => mb_substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6, 'UTF-8').' [...]'))
+            ->with('SQL', ['short' => $shortString, 'long' => mb_substr($longString, 0, DbalLogger::MAX_STRING_LENGTH - 6, 'UTF-8').' [...]'])
         ;
 
-        $dbalLogger->startQuery('SQL', array(
+        $dbalLogger->startQuery('SQL', [
                 'short' => $shortString,
                 'long' => $longString,
-            ));
+            ]);
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/ManagerRegistryTest.php b/src/Symfony/Bridge/Doctrine/Tests/ManagerRegistryTest.php
index 490a48cfe6..e5ebeeacf8 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/ManagerRegistryTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/ManagerRegistryTest.php
@@ -30,7 +30,7 @@ class ManagerRegistryTest extends TestCase
     {
         $container = new \LazyServiceProjectServiceContainer();
 
-        $registry = new TestManagerRegistry('name', array(), array('defaultManager' => 'foo'), 'defaultConnection', 'defaultManager', 'proxyInterfaceName');
+        $registry = new TestManagerRegistry('name', [], ['defaultManager' => 'foo'], 'defaultConnection', 'defaultManager', 'proxyInterfaceName');
         $registry->setTestContainer($container);
 
         $foo = $container->get('foo');
diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
index 498c5ecbc9..ace1d447c2 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/DoctrineExtractorTest.php
@@ -25,8 +25,8 @@ class DoctrineExtractorTest extends TestCase
 {
     private function createExtractor(bool $legacy = false)
     {
-        $config = Setup::createAnnotationMetadataConfiguration(array(__DIR__.\DIRECTORY_SEPARATOR.'Fixtures'), true);
-        $entityManager = EntityManager::create(array('driver' => 'pdo_sqlite'), $config);
+        $config = Setup::createAnnotationMetadataConfiguration([__DIR__.\DIRECTORY_SEPARATOR.'Fixtures'], true);
+        $entityManager = EntityManager::create(['driver' => 'pdo_sqlite'], $config);
 
         if (!DBALType::hasType('foo')) {
             DBALType::addType('foo', 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineFooType');
@@ -49,7 +49,7 @@ class DoctrineExtractorTest extends TestCase
     private function doTestGetProperties(bool $legacy)
     {
         $this->assertEquals(
-             array(
+             [
                 'id',
                 'guid',
                 'time',
@@ -67,7 +67,7 @@ class DoctrineExtractorTest extends TestCase
                 'bar',
                 'indexedBar',
                 'indexedFoo',
-            ),
+            ],
             $this->createExtractor($legacy)->getProperties('Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineDummy')
         );
     }
@@ -89,10 +89,10 @@ class DoctrineExtractorTest extends TestCase
         }
 
         $this->assertEquals(
-            array(
+            [
                 'id',
                 'embedded',
-            ),
+            ],
             $this->createExtractor($legacy)->getProperties('Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineWithEmbedded')
         );
     }
@@ -115,7 +115,7 @@ class DoctrineExtractorTest extends TestCase
 
     private function doTestExtract(bool $legacy, $property, array $type = null)
     {
-        $this->assertEquals($type, $this->createExtractor($legacy)->getTypes('Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineDummy', $property, array()));
+        $this->assertEquals($type, $this->createExtractor($legacy)->getTypes('Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineDummy', $property, []));
     }
 
     public function testExtractWithEmbedded()
@@ -134,16 +134,16 @@ class DoctrineExtractorTest extends TestCase
             $this->markTestSkipped('@Embedded is not available in Doctrine ORM lower than 2.5.');
         }
 
-        $expectedTypes = array(new Type(
+        $expectedTypes = [new Type(
             Type::BUILTIN_TYPE_OBJECT,
             false,
             'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineEmbeddable'
-        ));
+        )];
 
         $actualTypes = $this->createExtractor($legacy)->getTypes(
             'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineWithEmbedded',
             'embedded',
-            array()
+            []
         );
 
         $this->assertEquals($expectedTypes, $actualTypes);
@@ -151,47 +151,47 @@ class DoctrineExtractorTest extends TestCase
 
     public function typesProvider()
     {
-        return array(
-            array('id', array(new Type(Type::BUILTIN_TYPE_INT))),
-            array('guid', array(new Type(Type::BUILTIN_TYPE_STRING))),
-            array('bigint', array(new Type(Type::BUILTIN_TYPE_STRING))),
-            array('time', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))),
-            array('timeImmutable', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTimeImmutable'))),
-            array('dateInterval', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateInterval'))),
-            array('float', array(new Type(Type::BUILTIN_TYPE_FLOAT))),
-            array('decimal', array(new Type(Type::BUILTIN_TYPE_STRING))),
-            array('bool', array(new Type(Type::BUILTIN_TYPE_BOOL))),
-            array('binary', array(new Type(Type::BUILTIN_TYPE_RESOURCE))),
-            array('json', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true))),
-            array('foo', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineRelation'))),
-            array('bar', array(new Type(
+        return [
+            ['id', [new Type(Type::BUILTIN_TYPE_INT)]],
+            ['guid', [new Type(Type::BUILTIN_TYPE_STRING)]],
+            ['bigint', [new Type(Type::BUILTIN_TYPE_STRING)]],
+            ['time', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')]],
+            ['timeImmutable', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTimeImmutable')]],
+            ['dateInterval', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateInterval')]],
+            ['float', [new Type(Type::BUILTIN_TYPE_FLOAT)]],
+            ['decimal', [new Type(Type::BUILTIN_TYPE_STRING)]],
+            ['bool', [new Type(Type::BUILTIN_TYPE_BOOL)]],
+            ['binary', [new Type(Type::BUILTIN_TYPE_RESOURCE)]],
+            ['json', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true)]],
+            ['foo', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineRelation')]],
+            ['bar', [new Type(
                 Type::BUILTIN_TYPE_OBJECT,
                 false,
                 'Doctrine\Common\Collections\Collection',
                 true,
                 new Type(Type::BUILTIN_TYPE_INT),
                 new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineRelation')
-            ))),
-            array('indexedBar', array(new Type(
+            )]],
+            ['indexedBar', [new Type(
                 Type::BUILTIN_TYPE_OBJECT,
                 false,
                 'Doctrine\Common\Collections\Collection',
                 true,
                 new Type(Type::BUILTIN_TYPE_STRING),
                 new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineRelation')
-            ))),
-            array('indexedFoo', array(new Type(
+            )]],
+            ['indexedFoo', [new Type(
                 Type::BUILTIN_TYPE_OBJECT,
                 false,
                 'Doctrine\Common\Collections\Collection',
                 true,
                 new Type(Type::BUILTIN_TYPE_STRING),
                 new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Bridge\Doctrine\Tests\PropertyInfo\Fixtures\DoctrineRelation')
-            ))),
-            array('simpleArray', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING)))),
-            array('customFoo', null),
-            array('notMapped', null),
-        );
+            )]],
+            ['simpleArray', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))]],
+            ['customFoo', null],
+            ['notMapped', null],
+        ];
     }
 
     public function testGetPropertiesCatchException()
diff --git a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
index 8d0a938114..1b8cba50f3 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/PropertyInfo/Fixtures/DoctrineFooType.php
@@ -38,7 +38,7 @@ class DoctrineFooType extends Type
      */
     public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
     {
-        return $platform->getClobTypeDeclarationSQL(array());
+        return $platform->getClobTypeDeclarationSQL([]);
     }
 
     /**
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
index aa09feecda..eaa86b39f8 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Security/User/EntityUserProviderTest.php
@@ -145,7 +145,7 @@ class EntityUserProviderTest extends TestCase
 
         $provider = new EntityUserProvider($this->getManager($em), 'Symfony\Bridge\Doctrine\Tests\Fixtures\User', 'name');
 
-        $user2 = $em->getReference('Symfony\Bridge\Doctrine\Tests\Fixtures\User', array('id1' => 1, 'id2' => 1));
+        $user2 = $em->getReference('Symfony\Bridge\Doctrine\Tests\Fixtures\User', ['id1' => 1, 'id2' => 1]);
         $this->assertTrue($provider->supportsClass(\get_class($user2)));
     }
 
@@ -196,7 +196,7 @@ class EntityUserProviderTest extends TestCase
     private function getObjectManager($repository)
     {
         $em = $this->getMockBuilder('\Doctrine\Common\Persistence\ObjectManager')
-            ->setMethods(array('getClassMetadata', 'getRepository'))
+            ->setMethods(['getClassMetadata', 'getRepository'])
             ->getMockForAbstractClass();
         $em->expects($this->any())
             ->method('getRepository')
@@ -208,8 +208,8 @@ class EntityUserProviderTest extends TestCase
     private function createSchema($em)
     {
         $schemaTool = new SchemaTool($em);
-        $schemaTool->createSchema(array(
+        $schemaTool->createSchema([
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\User'),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Bridge/Doctrine/Tests/Validator/Constraints/UniqueEntityValidatorTest.php b/src/Symfony/Bridge/Doctrine/Tests/Validator/Constraints/UniqueEntityValidatorTest.php
index d8b55eb808..60007eb8a3 100644
--- a/src/Symfony/Bridge/Doctrine/Tests/Validator/Constraints/UniqueEntityValidatorTest.php
+++ b/src/Symfony/Bridge/Doctrine/Tests/Validator/Constraints/UniqueEntityValidatorTest.php
@@ -90,7 +90,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
     protected function createRepositoryMock()
     {
         $repository = $this->getMockBuilder('Doctrine\Common\Persistence\ObjectRepository')
-            ->setMethods(array('findByCustom', 'find', 'findAll', 'findOneBy', 'findBy', 'getClassName'))
+            ->setMethods(['findByCustom', 'find', 'findAll', 'findOneBy', 'findBy', 'getClassName'])
             ->getMock()
         ;
 
@@ -118,8 +118,8 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->getMock()
         ;
         $refl = $this->getMockBuilder('Doctrine\Common\Reflection\StaticReflectionProperty')
-            ->setConstructorArgs(array($reflParser, 'property-name'))
-            ->setMethods(array('getValue'))
+            ->setConstructorArgs([$reflParser, 'property-name'])
+            ->setMethods(['getValue'])
             ->getMock()
         ;
         $refl
@@ -127,7 +127,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->method('getValue')
             ->will($this->returnValue(true))
         ;
-        $classMetadata->reflFields = array('name' => $refl);
+        $classMetadata->reflFields = ['name' => $refl];
         $em->expects($this->any())
             ->method('getClassMetadata')
             ->will($this->returnValue($classMetadata))
@@ -144,7 +144,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
     private function createSchema(ObjectManager $em)
     {
         $schemaTool = new SchemaTool($em);
-        $schemaTool->createSchema(array(
+        $schemaTool->createSchema([
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdEntity'),
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdNoToStringEntity'),
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\DoubleNameEntity'),
@@ -156,7 +156,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\Employee'),
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\CompositeObjectNoToStringIdEntity'),
             $em->getClassMetadata('Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdStringWrapperNameEntity'),
-        ));
+        ]);
     }
 
     /**
@@ -164,11 +164,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidateUniqueness()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Foo');
@@ -190,19 +190,19 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name')
             ->setParameter('{{ value }}', '"Foo"')
             ->setInvalidValue($entity2)
-            ->setCause(array($entity1))
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
 
     public function testValidateCustomErrorPath()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'errorPath' => 'bar',
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Foo');
@@ -216,18 +216,18 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.bar')
             ->setParameter('{{ value }}', '"Foo"')
             ->setInvalidValue($entity2)
-            ->setCause(array($entity1))
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
 
     public function testValidateUniquenessWithNull()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, null);
         $entity2 = new SingleIntIdEntity(2, null);
@@ -243,12 +243,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidateUniquenessWithIgnoreNullDisabled()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name', 'name2'),
+            'fields' => ['name', 'name2'],
             'em' => self::EM_NAME,
             'ignoreNull' => false,
-        ));
+        ]);
 
         $entity1 = new DoubleNameEntity(1, 'Foo', null);
         $entity2 = new DoubleNameEntity(2, 'Foo', null);
@@ -270,7 +270,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name')
             ->setParameter('{{ value }}', '"Foo"')
             ->setInvalidValue('Foo')
-            ->setCause(array($entity1))
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
@@ -280,12 +280,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testAllConfiguredFieldsAreCheckedOfBeingMappedByDoctrineWithIgnoreNullEnabled()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name', 'name2'),
+            'fields' => ['name', 'name2'],
             'em' => self::EM_NAME,
             'ignoreNull' => true,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, null);
 
@@ -294,12 +294,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testNoValidationIfFirstFieldIsNullAndNullValuesAreIgnored()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name', 'name2'),
+            'fields' => ['name', 'name2'],
             'em' => self::EM_NAME,
             'ignoreNull' => true,
-        ));
+        ]);
 
         $entity1 = new DoubleNullableNameEntity(1, null, 'Foo');
         $entity2 = new DoubleNullableNameEntity(2, null, 'Foo');
@@ -322,12 +322,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidateUniquenessWithValidCustomErrorPath()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name', 'name2'),
+            'fields' => ['name', 'name2'],
             'em' => self::EM_NAME,
             'errorPath' => 'name2',
-        ));
+        ]);
 
         $entity1 = new DoubleNameEntity(1, 'Foo', 'Bar');
         $entity2 = new DoubleNameEntity(2, 'Foo', 'Bar');
@@ -349,24 +349,24 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name2')
             ->setParameter('{{ value }}', '"Bar"')
             ->setInvalidValue('Bar')
-            ->setCause(array($entity1))
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
 
     public function testValidateUniquenessUsingCustomRepositoryMethod()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'repositoryMethod' => 'findByCustom',
-        ));
+        ]);
 
         $repository = $this->createRepositoryMock();
         $repository->expects($this->once())
             ->method('findByCustom')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
         $this->em = $this->createEntityManagerMock($repository);
         $this->registry = $this->createRegistryMock($this->em);
@@ -382,12 +382,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidateUniquenessWithUnrewoundArray()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'repositoryMethod' => 'findByCustom',
-        ));
+        ]);
 
         $entity = new SingleIntIdEntity(1, 'foo');
 
@@ -396,9 +396,9 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->method('findByCustom')
             ->will(
                 $this->returnCallback(function () use ($entity) {
-                    $returnValue = array(
+                    $returnValue = [
                         $entity,
-                    );
+                    ];
                     next($returnValue);
 
                     return $returnValue;
@@ -420,12 +420,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidateResultTypes($entity1, $result)
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'repositoryMethod' => 'findByCustom',
-        ));
+        ]);
 
         $repository = $this->createRepositoryMock();
         $repository->expects($this->once())
@@ -446,20 +446,20 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
     {
         $entity = new SingleIntIdEntity(1, 'foo');
 
-        return array(
-            array($entity, array($entity)),
-            array($entity, new \ArrayIterator(array($entity))),
-            array($entity, new ArrayCollection(array($entity))),
-        );
+        return [
+            [$entity, [$entity]],
+            [$entity, new \ArrayIterator([$entity])],
+            [$entity, new ArrayCollection([$entity])],
+        ];
     }
 
     public function testAssociatedEntity()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('single'),
+            'fields' => ['single'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, 'foo');
         $associated = new AssociationEntity();
@@ -485,17 +485,17 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->setParameter('{{ value }}', 'foo')
             ->setInvalidValue($entity1)
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
-            ->setCause(array($associated, $associated2))
+            ->setCause([$associated, $associated2])
             ->assertRaised();
     }
 
     public function testValidateUniquenessNotToStringEntityWithAssociatedEntity()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('single'),
+            'fields' => ['single'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdNoToStringEntity(1, 'foo');
         $associated = new AssociationEntity2();
@@ -522,19 +522,19 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.single')
             ->setParameter('{{ value }}', $expectedValue)
             ->setInvalidValue($entity1)
-            ->setCause(array($associated, $associated2))
+            ->setCause([$associated, $associated2])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
 
     public function testAssociatedEntityWithNull()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('single'),
+            'fields' => ['single'],
             'em' => self::EM_NAME,
             'ignoreNull' => false,
-        ));
+        ]);
 
         $associated = new AssociationEntity();
         $associated->single = null;
@@ -552,19 +552,19 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
         $repository = $this->createRepositoryMock();
         $this->repositoryFactory->setRepository($this->em, 'Symfony\Bridge\Doctrine\Tests\Fixtures\SingleIntIdEntity', $repository);
 
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('phoneNumbers'),
+            'fields' => ['phoneNumbers'],
             'em' => self::EM_NAME,
             'repositoryMethod' => 'findByCustom',
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, 'foo');
         $entity1->phoneNumbers[] = 123;
 
         $repository->expects($this->once())
             ->method('findByCustom')
-            ->will($this->returnValue(array($entity1)))
+            ->will($this->returnValue([$entity1]))
         ;
 
         $this->em->persist($entity1);
@@ -580,8 +580,8 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
         $this->buildViolation('myMessage')
             ->atPath('property.path.phoneNumbers')
             ->setParameter('{{ value }}', 'array')
-            ->setInvalidValue(array(123))
-            ->setCause(array($entity1))
+            ->setInvalidValue([123])
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
@@ -592,11 +592,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testDedicatedEntityManagerNullObject()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $this->em = null;
         $this->registry = $this->createRegistryMock($this->em);
@@ -614,11 +614,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testEntityManagerNullObject()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             // no "em" option set
-        ));
+        ]);
 
         $this->em = null;
         $this->registry = $this->createRegistryMock($this->em);
@@ -643,11 +643,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
         $this->validator = $this->createValidator();
         $this->validator->initialize($this->context);
 
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity = new SingleIntIdEntity(1, null);
 
@@ -660,12 +660,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidateInheritanceUniqueness()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'entityClass' => 'Symfony\Bridge\Doctrine\Tests\Fixtures\Person',
-        ));
+        ]);
 
         $entity1 = new Person(1, 'Foo');
         $entity2 = new Employee(2, 'Foo');
@@ -687,8 +687,8 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name')
             ->setInvalidValue('Foo')
             ->setCode('23bd9dbf-6b9b-41cd-a99e-4844bcf3077f')
-            ->setCause(array($entity1))
-            ->setParameters(array('{{ value }}' => '"Foo"'))
+            ->setCause([$entity1])
+            ->setParameters(['{{ value }}' => '"Foo"'])
             ->assertRaised();
     }
 
@@ -698,12 +698,12 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidateRepositoryForInheritance()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
             'entityClass' => 'Symfony\Bridge\Doctrine\Tests\Fixtures\SingleStringIdEntity',
-        ));
+        ]);
 
         $entity = new Person(1, 'Foo');
         $this->validator->validate($entity, $constraint);
@@ -711,11 +711,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidateUniquenessWithCompositeObjectNoToStringIdEntity()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('objectOne', 'objectTwo'),
+            'fields' => ['objectOne', 'objectTwo'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $objectOne = new SingleIntIdNoToStringEntity(1, 'foo');
         $objectTwo = new SingleIntIdNoToStringEntity(2, 'bar');
@@ -739,18 +739,18 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.objectOne')
             ->setParameter('{{ value }}', $expectedValue)
             ->setInvalidValue($objectOne)
-            ->setCause(array($entity))
+            ->setCause([$entity])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
 
     public function testValidateUniquenessWithCustomDoctrineTypeValue()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $existingEntity = new SingleIntIdStringWrapperNameEntity(1, new StringWrapper('foo'));
 
@@ -767,7 +767,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name')
             ->setParameter('{{ value }}', $expectedValue)
             ->setInvalidValue($existingEntity->name)
-            ->setCause(array($existingEntity))
+            ->setCause([$existingEntity])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
@@ -777,11 +777,11 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidateUniquenessCause()
     {
-        $constraint = new UniqueEntity(array(
+        $constraint = new UniqueEntity([
             'message' => 'myMessage',
-            'fields' => array('name'),
+            'fields' => ['name'],
             'em' => self::EM_NAME,
-        ));
+        ]);
 
         $entity1 = new SingleIntIdEntity(1, 'Foo');
         $entity2 = new SingleIntIdEntity(2, 'Foo');
@@ -803,7 +803,7 @@ class UniqueEntityValidatorTest extends ConstraintValidatorTestCase
             ->atPath('property.path.name')
             ->setParameter('{{ value }}', '"Foo"')
             ->setInvalidValue($entity2)
-            ->setCause(array($entity1))
+            ->setCause([$entity1])
             ->setCode(UniqueEntity::NOT_UNIQUE_ERROR)
             ->assertRaised();
     }
diff --git a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntity.php b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntity.php
index c9b13dcf59..2c319709eb 100644
--- a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntity.php
+++ b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntity.php
@@ -30,17 +30,17 @@ class UniqueEntity extends Constraint
     public $em = null;
     public $entityClass = null;
     public $repositoryMethod = 'findBy';
-    public $fields = array();
+    public $fields = [];
     public $errorPath = null;
     public $ignoreNull = true;
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_UNIQUE_ERROR => 'NOT_UNIQUE_ERROR',
-    );
+    ];
 
     public function getRequiredOptions()
     {
-        return array('fields');
+        return ['fields'];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
index 161a187ff9..47cb2bd730 100644
--- a/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
+++ b/src/Symfony/Bridge/Doctrine/Validator/Constraints/UniqueEntityValidator.php
@@ -81,7 +81,7 @@ class UniqueEntityValidator extends ConstraintValidator
         $class = $em->getClassMetadata(\get_class($entity));
         /* @var $class \Doctrine\Common\Persistence\Mapping\ClassMetadata */
 
-        $criteria = array();
+        $criteria = [];
         $hasNullValue = false;
 
         foreach ($fields as $fieldName) {
@@ -149,15 +149,15 @@ class UniqueEntityValidator extends ConstraintValidator
         if ($result instanceof \Iterator) {
             $result->rewind();
             if ($result instanceof \Countable && 1 < \count($result)) {
-                $result = array($result->current(), $result->current());
+                $result = [$result->current(), $result->current()];
             } else {
                 $result = $result->current();
-                $result = null === $result ? array() : array($result);
+                $result = null === $result ? [] : [$result];
             }
         } elseif (\is_array($result)) {
             reset($result);
         } else {
-            $result = null === $result ? array() : array($result);
+            $result = null === $result ? [] : [$result];
         }
 
         /* If no entity matched the query criteria or a single entity matched,
@@ -197,7 +197,7 @@ class UniqueEntityValidator extends ConstraintValidator
             } else {
                 // this case might happen if the non unique column has a custom doctrine type and its value is an object
                 // in which case we cannot get any identifiers for it
-                $identifiers = array();
+                $identifiers = [];
             }
         } else {
             $identifiers = $class->getIdentifierValues($value);
diff --git a/src/Symfony/Bridge/Monolog/Formatter/ConsoleFormatter.php b/src/Symfony/Bridge/Monolog/Formatter/ConsoleFormatter.php
index feb735e8ac..d9ac83470a 100644
--- a/src/Symfony/Bridge/Monolog/Formatter/ConsoleFormatter.php
+++ b/src/Symfony/Bridge/Monolog/Formatter/ConsoleFormatter.php
@@ -30,7 +30,7 @@ class ConsoleFormatter implements FormatterInterface
     const SIMPLE_FORMAT = "%datetime% %start_tag%%level_name%%end_tag% <comment>[%channel%]</> %message%%context%%extra%\n";
     const SIMPLE_DATE = 'H:i:s';
 
-    private static $levelColorMap = array(
+    private static $levelColorMap = [
         Logger::DEBUG => 'fg=white',
         Logger::INFO => 'fg=green',
         Logger::NOTICE => 'fg=blue',
@@ -39,7 +39,7 @@ class ConsoleFormatter implements FormatterInterface
         Logger::CRITICAL => 'fg=red',
         Logger::ALERT => 'fg=red',
         Logger::EMERGENCY => 'fg=white;bg=red',
-    );
+    ];
 
     private $options;
     private $cloner;
@@ -53,28 +53,28 @@ class ConsoleFormatter implements FormatterInterface
      *   * colors: If true, the log string contains ANSI code to add color;
      *   * multiline: If false, "context" and "extra" are dumped on one line.
      */
-    public function __construct(array $options = array())
+    public function __construct(array $options = [])
     {
-        $this->options = array_replace(array(
+        $this->options = array_replace([
             'format' => self::SIMPLE_FORMAT,
             'date_format' => self::SIMPLE_DATE,
             'colors' => true,
             'multiline' => false,
             'level_name_format' => '%-9s',
             'ignore_empty_context_and_extra' => true,
-        ), $options);
+        ], $options);
 
         if (class_exists(VarCloner::class)) {
             $this->cloner = new VarCloner();
-            $this->cloner->addCasters(array(
-                '*' => array($this, 'castObject'),
-            ));
+            $this->cloner->addCasters([
+                '*' => [$this, 'castObject'],
+            ]);
 
             $this->outputBuffer = fopen('php://memory', 'r+b');
             if ($this->options['multiline']) {
                 $output = $this->outputBuffer;
             } else {
-                $output = array($this, 'echoLine');
+                $output = [$this, 'echoLine'];
             }
 
             $this->dumper = new CliDumper($output, null, CliDumper::DUMP_LIGHT_ARRAY | CliDumper::DUMP_COMMA_SEPARATOR);
@@ -114,7 +114,7 @@ class ConsoleFormatter implements FormatterInterface
             $extra = '';
         }
 
-        $formatted = strtr($this->options['format'], array(
+        $formatted = strtr($this->options['format'], [
             '%datetime%' => $record['datetime']->format($this->options['date_format']),
             '%start_tag%' => sprintf('<%s>', $levelColor),
             '%level_name%' => sprintf($this->options['level_name_format'], $record['level_name']),
@@ -123,7 +123,7 @@ class ConsoleFormatter implements FormatterInterface
             '%message%' => $this->replacePlaceHolder($record)['message'],
             '%context%' => $context,
             '%extra%' => $extra,
-        ));
+        ]);
 
         return $formatted;
     }
@@ -149,7 +149,7 @@ class ConsoleFormatter implements FormatterInterface
 
         if ($isNested && !$v instanceof \DateTimeInterface) {
             $s->cut = -1;
-            $a = array();
+            $a = [];
         }
 
         return $a;
@@ -165,7 +165,7 @@ class ConsoleFormatter implements FormatterInterface
 
         $context = $record['context'];
 
-        $replacements = array();
+        $replacements = [];
         foreach ($context as $k => $v) {
             // Remove quotes added by the dumper around string.
             $v = trim($this->dumpData($v, false), '"');
diff --git a/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php b/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
index 65e99f6f87..c27b0803e2 100644
--- a/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/ChromePhpHandler.php
@@ -22,7 +22,7 @@ use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
  */
 class ChromePhpHandler extends BaseChromePhpHandler
 {
-    private $headers = array();
+    private $headers = [];
 
     /**
      * @var Response
@@ -40,7 +40,7 @@ class ChromePhpHandler extends BaseChromePhpHandler
 
         if (!preg_match(static::USER_AGENT_REGEX, $event->getRequest()->headers->get('User-Agent'))) {
             $this->sendHeaders = false;
-            $this->headers = array();
+            $this->headers = [];
 
             return;
         }
@@ -49,7 +49,7 @@ class ChromePhpHandler extends BaseChromePhpHandler
         foreach ($this->headers as $header => $content) {
             $this->response->headers->set($header, $content);
         }
-        $this->headers = array();
+        $this->headers = [];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Monolog/Handler/ConsoleHandler.php b/src/Symfony/Bridge/Monolog/Handler/ConsoleHandler.php
index a23dc327c4..997ecc107c 100644
--- a/src/Symfony/Bridge/Monolog/Handler/ConsoleHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/ConsoleHandler.php
@@ -43,13 +43,13 @@ use Symfony\Component\VarDumper\Dumper\CliDumper;
 class ConsoleHandler extends AbstractProcessingHandler implements EventSubscriberInterface
 {
     private $output;
-    private $verbosityLevelMap = array(
+    private $verbosityLevelMap = [
         OutputInterface::VERBOSITY_QUIET => Logger::ERROR,
         OutputInterface::VERBOSITY_NORMAL => Logger::WARNING,
         OutputInterface::VERBOSITY_VERBOSE => Logger::NOTICE,
         OutputInterface::VERBOSITY_VERY_VERBOSE => Logger::INFO,
         OutputInterface::VERBOSITY_DEBUG => Logger::DEBUG,
-    );
+    ];
 
     /**
      * @param OutputInterface|null $output            The console output to use (the handler remains disabled when passing null
@@ -58,7 +58,7 @@ class ConsoleHandler extends AbstractProcessingHandler implements EventSubscribe
      * @param array                $verbosityLevelMap Array that maps the OutputInterface verbosity to a minimum logging
      *                                                level (leave empty to use the default mapping)
      */
-    public function __construct(OutputInterface $output = null, bool $bubble = true, array $verbosityLevelMap = array())
+    public function __construct(OutputInterface $output = null, bool $bubble = true, array $verbosityLevelMap = [])
     {
         parent::__construct(Logger::DEBUG, $bubble);
         $this->output = $output;
@@ -131,10 +131,10 @@ class ConsoleHandler extends AbstractProcessingHandler implements EventSubscribe
      */
     public static function getSubscribedEvents()
     {
-        return array(
-            ConsoleEvents::COMMAND => array('onCommand', 255),
-            ConsoleEvents::TERMINATE => array('onTerminate', -255),
-        );
+        return [
+            ConsoleEvents::COMMAND => ['onCommand', 255],
+            ConsoleEvents::TERMINATE => ['onTerminate', -255],
+        ];
     }
 
     /**
@@ -158,10 +158,10 @@ class ConsoleHandler extends AbstractProcessingHandler implements EventSubscribe
             return new ConsoleFormatter();
         }
 
-        return new ConsoleFormatter(array(
+        return new ConsoleFormatter([
             'colors' => $this->output->isDecorated(),
             'multiline' => OutputInterface::VERBOSITY_DEBUG <= $this->output->getVerbosity(),
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php b/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
index 9956edad38..9c3ec5f981 100644
--- a/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/FirePHPHandler.php
@@ -22,7 +22,7 @@ use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
  */
 class FirePHPHandler extends BaseFirePHPHandler
 {
-    private $headers = array();
+    private $headers = [];
 
     /**
      * @var Response
@@ -42,7 +42,7 @@ class FirePHPHandler extends BaseFirePHPHandler
         if (!preg_match('{\bFirePHP/\d+\.\d+\b}', $request->headers->get('User-Agent'))
             && !$request->headers->has('X-FirePHP-Version')) {
             self::$sendHeaders = false;
-            $this->headers = array();
+            $this->headers = [];
 
             return;
         }
@@ -51,7 +51,7 @@ class FirePHPHandler extends BaseFirePHPHandler
         foreach ($this->headers as $header => $content) {
             $this->response->headers->set($header, $content);
         }
-        $this->headers = array();
+        $this->headers = [];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php b/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
index 4c454f1770..22c035731d 100644
--- a/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
+++ b/src/Symfony/Bridge/Monolog/Handler/ServerLogHandler.php
@@ -24,7 +24,7 @@ class ServerLogHandler extends AbstractHandler
     private $context;
     private $socket;
 
-    public function __construct(string $host, int $level = Logger::DEBUG, bool $bubble = true, array $context = array())
+    public function __construct(string $host, int $level = Logger::DEBUG, bool $bubble = true, array $context = [])
     {
         parent::__construct($level, $bubble);
 
@@ -108,7 +108,7 @@ class ServerLogHandler extends AbstractHandler
 
         $recordFormatted = $this->getFormatter()->format($record);
 
-        foreach (array('log_uuid', 'uuid', 'uid') as $key) {
+        foreach (['log_uuid', 'uuid', 'uid'] as $key) {
             if (isset($record['extra'][$key])) {
                 $recordFormatted['log_id'] = $record['extra'][$key];
                 break;
diff --git a/src/Symfony/Bridge/Monolog/Logger.php b/src/Symfony/Bridge/Monolog/Logger.php
index 1d896f4ac4..de021426e0 100644
--- a/src/Symfony/Bridge/Monolog/Logger.php
+++ b/src/Symfony/Bridge/Monolog/Logger.php
@@ -36,7 +36,7 @@ class Logger extends BaseLogger implements DebugLoggerInterface, ResetInterface
             return $logger->getLogs(...\func_get_args());
         }
 
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Monolog/Processor/DebugProcessor.php b/src/Symfony/Bridge/Monolog/Processor/DebugProcessor.php
index 2abd9d06a1..24a670de79 100644
--- a/src/Symfony/Bridge/Monolog/Processor/DebugProcessor.php
+++ b/src/Symfony/Bridge/Monolog/Processor/DebugProcessor.php
@@ -19,8 +19,8 @@ use Symfony\Contracts\Service\ResetInterface;
 
 class DebugProcessor implements DebugLoggerInterface, ResetInterface
 {
-    private $records = array();
-    private $errorCount = array();
+    private $records = [];
+    private $errorCount = [];
     private $requestStack;
 
     public function __construct(RequestStack $requestStack = null)
@@ -32,14 +32,14 @@ class DebugProcessor implements DebugLoggerInterface, ResetInterface
     {
         $hash = $this->requestStack && ($request = $this->requestStack->getCurrentRequest()) ? spl_object_hash($request) : '';
 
-        $this->records[$hash][] = array(
+        $this->records[$hash][] = [
             'timestamp' => $record['datetime']->getTimestamp(),
             'message' => $record['message'],
             'priority' => $record['level'],
             'priorityName' => $record['level_name'],
             'context' => $record['context'],
             'channel' => isset($record['channel']) ? $record['channel'] : '',
-        );
+        ];
 
         if (!isset($this->errorCount[$hash])) {
             $this->errorCount[$hash] = 0;
@@ -68,11 +68,11 @@ class DebugProcessor implements DebugLoggerInterface, ResetInterface
         }
 
         if (1 <= \func_num_args() && null !== $request = \func_get_arg(0)) {
-            return $this->records[spl_object_hash($request)] ?? array();
+            return $this->records[spl_object_hash($request)] ?? [];
         }
 
         if (0 === \count($this->records)) {
-            return array();
+            return [];
         }
 
         return array_merge(...array_values($this->records));
@@ -101,8 +101,8 @@ class DebugProcessor implements DebugLoggerInterface, ResetInterface
      */
     public function clear()
     {
-        $this->records = array();
-        $this->errorCount = array();
+        $this->records = [];
+        $this->errorCount = [];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Monolog/Processor/TokenProcessor.php b/src/Symfony/Bridge/Monolog/Processor/TokenProcessor.php
index 11547be22b..7bf03a036a 100644
--- a/src/Symfony/Bridge/Monolog/Processor/TokenProcessor.php
+++ b/src/Symfony/Bridge/Monolog/Processor/TokenProcessor.php
@@ -31,11 +31,11 @@ class TokenProcessor
     {
         $records['extra']['token'] = null;
         if (null !== $token = $this->tokenStorage->getToken()) {
-            $records['extra']['token'] = array(
+            $records['extra']['token'] = [
                 'username' => $token->getUsername(),
                 'authenticated' => $token->isAuthenticated(),
                 'roles' => array_map(function ($role) { return $role->getRole(); }, $token->getRoles()),
-            );
+            ];
         }
 
         return $records;
diff --git a/src/Symfony/Bridge/Monolog/Processor/WebProcessor.php b/src/Symfony/Bridge/Monolog/Processor/WebProcessor.php
index 9c32e756c5..8bf8cec3df 100644
--- a/src/Symfony/Bridge/Monolog/Processor/WebProcessor.php
+++ b/src/Symfony/Bridge/Monolog/Processor/WebProcessor.php
@@ -26,7 +26,7 @@ class WebProcessor extends BaseWebProcessor implements EventSubscriberInterface
     public function __construct(array $extraFields = null)
     {
         // Pass an empty array as the default null value would access $_SERVER
-        parent::__construct(array(), $extraFields);
+        parent::__construct([], $extraFields);
     }
 
     public function onKernelRequest(GetResponseEvent $event)
@@ -39,8 +39,8 @@ class WebProcessor extends BaseWebProcessor implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array('onKernelRequest', 4096),
-        );
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 4096],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php b/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
index 03bba1b3e2..00106c54e1 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Handler/ConsoleHandlerTest.php
@@ -38,13 +38,13 @@ class ConsoleHandlerTest extends TestCase
     public function testIsHandling()
     {
         $handler = new ConsoleHandler();
-        $this->assertFalse($handler->isHandling(array()), '->isHandling returns false when no output is set');
+        $this->assertFalse($handler->isHandling([]), '->isHandling returns false when no output is set');
     }
 
     /**
      * @dataProvider provideVerbosityMappingTests
      */
-    public function testVerbosityMapping($verbosity, $level, $isHandling, array $map = array())
+    public function testVerbosityMapping($verbosity, $level, $isHandling, array $map = [])
     {
         $output = $this->getMockBuilder('Symfony\Component\Console\Output\OutputInterface')->getMock();
         $output
@@ -53,7 +53,7 @@ class ConsoleHandlerTest extends TestCase
             ->will($this->returnValue($verbosity))
         ;
         $handler = new ConsoleHandler($output, true, $map);
-        $this->assertSame($isHandling, $handler->isHandling(array('level' => $level)),
+        $this->assertSame($isHandling, $handler->isHandling(['level' => $level]),
             '->isHandling returns correct value depending on console verbosity and log level'
         );
 
@@ -61,7 +61,7 @@ class ConsoleHandlerTest extends TestCase
         $levelName = Logger::getLevelName($level);
         $levelName = sprintf('%-9s', $levelName);
 
-        $realOutput = $this->getMockBuilder('Symfony\Component\Console\Output\Output')->setMethods(array('doWrite'))->getMock();
+        $realOutput = $this->getMockBuilder('Symfony\Component\Console\Output\Output')->setMethods(['doWrite'])->getMock();
         $realOutput->setVerbosity($verbosity);
         if ($realOutput->isDebug()) {
             $log = "16:21:54 $levelName [app] My info message\n";
@@ -74,38 +74,38 @@ class ConsoleHandlerTest extends TestCase
             ->with($log, false);
         $handler = new ConsoleHandler($realOutput, true, $map);
 
-        $infoRecord = array(
+        $infoRecord = [
             'message' => 'My info message',
-            'context' => array(),
+            'context' => [],
             'level' => $level,
             'level_name' => Logger::getLevelName($level),
             'channel' => 'app',
             'datetime' => new \DateTime('2013-05-29 16:21:54'),
-            'extra' => array(),
-        );
+            'extra' => [],
+        ];
         $this->assertFalse($handler->handle($infoRecord), 'The handler finished handling the log.');
     }
 
     public function provideVerbosityMappingTests()
     {
-        return array(
-            array(OutputInterface::VERBOSITY_QUIET, Logger::ERROR, true),
-            array(OutputInterface::VERBOSITY_QUIET, Logger::WARNING, false),
-            array(OutputInterface::VERBOSITY_NORMAL, Logger::WARNING, true),
-            array(OutputInterface::VERBOSITY_NORMAL, Logger::NOTICE, false),
-            array(OutputInterface::VERBOSITY_VERBOSE, Logger::NOTICE, true),
-            array(OutputInterface::VERBOSITY_VERBOSE, Logger::INFO, false),
-            array(OutputInterface::VERBOSITY_VERY_VERBOSE, Logger::INFO, true),
-            array(OutputInterface::VERBOSITY_VERY_VERBOSE, Logger::DEBUG, false),
-            array(OutputInterface::VERBOSITY_DEBUG, Logger::DEBUG, true),
-            array(OutputInterface::VERBOSITY_DEBUG, Logger::EMERGENCY, true),
-            array(OutputInterface::VERBOSITY_NORMAL, Logger::NOTICE, true, array(
+        return [
+            [OutputInterface::VERBOSITY_QUIET, Logger::ERROR, true],
+            [OutputInterface::VERBOSITY_QUIET, Logger::WARNING, false],
+            [OutputInterface::VERBOSITY_NORMAL, Logger::WARNING, true],
+            [OutputInterface::VERBOSITY_NORMAL, Logger::NOTICE, false],
+            [OutputInterface::VERBOSITY_VERBOSE, Logger::NOTICE, true],
+            [OutputInterface::VERBOSITY_VERBOSE, Logger::INFO, false],
+            [OutputInterface::VERBOSITY_VERY_VERBOSE, Logger::INFO, true],
+            [OutputInterface::VERBOSITY_VERY_VERBOSE, Logger::DEBUG, false],
+            [OutputInterface::VERBOSITY_DEBUG, Logger::DEBUG, true],
+            [OutputInterface::VERBOSITY_DEBUG, Logger::EMERGENCY, true],
+            [OutputInterface::VERBOSITY_NORMAL, Logger::NOTICE, true, [
                 OutputInterface::VERBOSITY_NORMAL => Logger::NOTICE,
-            )),
-            array(OutputInterface::VERBOSITY_DEBUG, Logger::NOTICE, true, array(
+            ]],
+            [OutputInterface::VERBOSITY_DEBUG, Logger::NOTICE, true, [
                 OutputInterface::VERBOSITY_NORMAL => Logger::NOTICE,
-            )),
-        );
+            ]],
+        ];
     }
 
     public function testVerbosityChanged()
@@ -122,10 +122,10 @@ class ConsoleHandlerTest extends TestCase
             ->will($this->returnValue(OutputInterface::VERBOSITY_DEBUG))
         ;
         $handler = new ConsoleHandler($output);
-        $this->assertFalse($handler->isHandling(array('level' => Logger::NOTICE)),
+        $this->assertFalse($handler->isHandling(['level' => Logger::NOTICE]),
             'when verbosity is set to quiet, the handler does not handle the log'
         );
-        $this->assertTrue($handler->isHandling(array('level' => Logger::NOTICE)),
+        $this->assertTrue($handler->isHandling(['level' => Logger::NOTICE]),
             'since the verbosity of the output increased externally, the handler is now handling the log'
         );
     }
@@ -155,15 +155,15 @@ class ConsoleHandlerTest extends TestCase
         $handler = new ConsoleHandler(null, false);
         $handler->setOutput($output);
 
-        $infoRecord = array(
+        $infoRecord = [
             'message' => 'My info message',
-            'context' => array(),
+            'context' => [],
             'level' => Logger::INFO,
             'level_name' => Logger::getLevelName(Logger::INFO),
             'channel' => 'app',
             'datetime' => new \DateTime('2013-05-29 16:21:54'),
-            'extra' => array(),
-        );
+            'extra' => [],
+        ];
 
         $this->assertTrue($handler->handle($infoRecord), 'The handler finished handling the log as bubble is false.');
     }
diff --git a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/HttpCodeActivationStrategyTest.php b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/HttpCodeActivationStrategyTest.php
index 9f0b0b3735..0fce18d386 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/HttpCodeActivationStrategyTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/HttpCodeActivationStrategyTest.php
@@ -25,7 +25,7 @@ class HttpCodeActivationStrategyTest extends TestCase
      */
     public function testExclusionsWithoutCode()
     {
-        new HttpCodeActivationStrategy(new RequestStack(), array(array('urls' => array())), Logger::WARNING);
+        new HttpCodeActivationStrategy(new RequestStack(), [['urls' => []]], Logger::WARNING);
     }
 
     /**
@@ -33,7 +33,7 @@ class HttpCodeActivationStrategyTest extends TestCase
      */
     public function testExclusionsWithoutUrls()
     {
-        new HttpCodeActivationStrategy(new RequestStack(), array(array('code' => 404)), Logger::WARNING);
+        new HttpCodeActivationStrategy(new RequestStack(), [['code' => 404]], Logger::WARNING);
     }
 
     /**
@@ -46,12 +46,12 @@ class HttpCodeActivationStrategyTest extends TestCase
 
         $strategy = new HttpCodeActivationStrategy(
             $requestStack,
-            array(
-                array('code' => 403, 'urls' => array()),
-                array('code' => 404, 'urls' => array()),
-                array('code' => 405, 'urls' => array()),
-                array('code' => 400, 'urls' => array('^/400/a', '^/400/b')),
-            ),
+            [
+                ['code' => 403, 'urls' => []],
+                ['code' => 404, 'urls' => []],
+                ['code' => 405, 'urls' => []],
+                ['code' => 400, 'urls' => ['^/400/a', '^/400/b']],
+            ],
             Logger::WARNING
         );
 
@@ -60,22 +60,22 @@ class HttpCodeActivationStrategyTest extends TestCase
 
     public function isActivatedProvider()
     {
-        return array(
-            array('/test',  array('level' => Logger::ERROR), true),
-            array('/400',   array('level' => Logger::ERROR, 'context' => $this->getContextException(400)), true),
-            array('/400/a', array('level' => Logger::ERROR, 'context' => $this->getContextException(400)), false),
-            array('/400/b', array('level' => Logger::ERROR, 'context' => $this->getContextException(400)), false),
-            array('/400/c', array('level' => Logger::ERROR, 'context' => $this->getContextException(400)), true),
-            array('/401',   array('level' => Logger::ERROR, 'context' => $this->getContextException(401)), true),
-            array('/403',   array('level' => Logger::ERROR, 'context' => $this->getContextException(403)), false),
-            array('/404',   array('level' => Logger::ERROR, 'context' => $this->getContextException(404)), false),
-            array('/405',   array('level' => Logger::ERROR, 'context' => $this->getContextException(405)), false),
-            array('/500',   array('level' => Logger::ERROR, 'context' => $this->getContextException(500)), true),
-        );
+        return [
+            ['/test',  ['level' => Logger::ERROR], true],
+            ['/400',   ['level' => Logger::ERROR, 'context' => $this->getContextException(400)], true],
+            ['/400/a', ['level' => Logger::ERROR, 'context' => $this->getContextException(400)], false],
+            ['/400/b', ['level' => Logger::ERROR, 'context' => $this->getContextException(400)], false],
+            ['/400/c', ['level' => Logger::ERROR, 'context' => $this->getContextException(400)], true],
+            ['/401',   ['level' => Logger::ERROR, 'context' => $this->getContextException(401)], true],
+            ['/403',   ['level' => Logger::ERROR, 'context' => $this->getContextException(403)], false],
+            ['/404',   ['level' => Logger::ERROR, 'context' => $this->getContextException(404)], false],
+            ['/405',   ['level' => Logger::ERROR, 'context' => $this->getContextException(405)], false],
+            ['/500',   ['level' => Logger::ERROR, 'context' => $this->getContextException(500)], true],
+        ];
     }
 
     protected function getContextException($code)
     {
-        return array('exception' => new HttpException($code));
+        return ['exception' => new HttpException($code)];
     }
 }
diff --git a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
index 3c34f065eb..b04678106c 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Handler/FingersCrossed/NotFoundActivationStrategyTest.php
@@ -28,28 +28,28 @@ class NotFoundActivationStrategyTest extends TestCase
         $requestStack = new RequestStack();
         $requestStack->push(Request::create($url));
 
-        $strategy = new NotFoundActivationStrategy($requestStack, array('^/foo', 'bar'), Logger::WARNING);
+        $strategy = new NotFoundActivationStrategy($requestStack, ['^/foo', 'bar'], Logger::WARNING);
 
         $this->assertEquals($expected, $strategy->isHandlerActivated($record));
     }
 
     public function isActivatedProvider()
     {
-        return array(
-            array('/test',      array('level' => Logger::DEBUG), false),
-            array('/foo',       array('level' => Logger::DEBUG, 'context' => $this->getContextException(404)), false),
-            array('/baz/bar',   array('level' => Logger::ERROR, 'context' => $this->getContextException(404)), false),
-            array('/foo',       array('level' => Logger::ERROR, 'context' => $this->getContextException(404)), false),
-            array('/foo',       array('level' => Logger::ERROR, 'context' => $this->getContextException(500)), true),
+        return [
+            ['/test',      ['level' => Logger::DEBUG], false],
+            ['/foo',       ['level' => Logger::DEBUG, 'context' => $this->getContextException(404)], false],
+            ['/baz/bar',   ['level' => Logger::ERROR, 'context' => $this->getContextException(404)], false],
+            ['/foo',       ['level' => Logger::ERROR, 'context' => $this->getContextException(404)], false],
+            ['/foo',       ['level' => Logger::ERROR, 'context' => $this->getContextException(500)], true],
 
-            array('/test',      array('level' => Logger::ERROR), true),
-            array('/baz',       array('level' => Logger::ERROR, 'context' => $this->getContextException(404)), true),
-            array('/baz',       array('level' => Logger::ERROR, 'context' => $this->getContextException(500)), true),
-        );
+            ['/test',      ['level' => Logger::ERROR], true],
+            ['/baz',       ['level' => Logger::ERROR, 'context' => $this->getContextException(404)], true],
+            ['/baz',       ['level' => Logger::ERROR, 'context' => $this->getContextException(500)], true],
+        ];
     }
 
     protected function getContextException($code)
     {
-        return array('exception' => new HttpException($code));
+        return ['exception' => new HttpException($code)];
     }
 }
diff --git a/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php b/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
index 6ffade8073..2ee7bc7d93 100644
--- a/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/LoggerTest.php
@@ -22,16 +22,16 @@ class LoggerTest extends TestCase
     public function testGetLogsWithoutDebugProcessor()
     {
         $handler = new TestHandler();
-        $logger = new Logger(__METHOD__, array($handler));
+        $logger = new Logger(__METHOD__, [$handler]);
 
         $logger->error('error message');
-        $this->assertSame(array(), $logger->getLogs());
+        $this->assertSame([], $logger->getLogs());
     }
 
     public function testCountErrorsWithoutDebugProcessor()
     {
         $handler = new TestHandler();
-        $logger = new Logger(__METHOD__, array($handler));
+        $logger = new Logger(__METHOD__, [$handler]);
 
         $logger->error('error message');
         $this->assertSame(0, $logger->countErrors());
@@ -41,7 +41,7 @@ class LoggerTest extends TestCase
     {
         $handler = new TestHandler();
         $processor = new DebugProcessor();
-        $logger = new Logger(__METHOD__, array($handler), array($processor));
+        $logger = new Logger(__METHOD__, [$handler], [$processor]);
 
         $logger->error('error message');
         $this->assertCount(1, $logger->getLogs());
@@ -51,7 +51,7 @@ class LoggerTest extends TestCase
     {
         $handler = new TestHandler();
         $processor = new DebugProcessor();
-        $logger = new Logger(__METHOD__, array($handler), array($processor));
+        $logger = new Logger(__METHOD__, [$handler], [$processor]);
 
         $logger->debug('test message');
         $logger->info('test message');
@@ -69,7 +69,7 @@ class LoggerTest extends TestCase
     public function testGetLogsWithDebugProcessor2()
     {
         $handler = new TestHandler();
-        $logger = new Logger('test', array($handler));
+        $logger = new Logger('test', [$handler]);
         $logger->pushProcessor(new DebugProcessor());
 
         $logger->info('test');
@@ -88,7 +88,7 @@ class LoggerTest extends TestCase
         $processor->expects($this->once())->method('countErrors')->with($request);
 
         $handler = new TestHandler();
-        $logger = new Logger('test', array($handler));
+        $logger = new Logger('test', [$handler]);
         $logger->pushProcessor($processor);
 
         $logger->getLogs($request);
@@ -98,7 +98,7 @@ class LoggerTest extends TestCase
     public function testClear()
     {
         $handler = new TestHandler();
-        $logger = new Logger('test', array($handler));
+        $logger = new Logger('test', [$handler]);
         $logger->pushProcessor(new DebugProcessor());
 
         $logger->info('test');
diff --git a/src/Symfony/Bridge/Monolog/Tests/Processor/DebugProcessorTest.php b/src/Symfony/Bridge/Monolog/Tests/Processor/DebugProcessorTest.php
index 8712632ce6..9aceb9337e 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Processor/DebugProcessorTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Processor/DebugProcessorTest.php
@@ -85,15 +85,15 @@ class DebugProcessorTest extends TestCase
 
     private function getRecord($level = Logger::WARNING, $message = 'test')
     {
-        return array(
+        return [
             'message' => $message,
-            'context' => array(),
+            'context' => [],
             'level' => $level,
             'level_name' => Logger::getLevelName($level),
             'channel' => 'test',
             'datetime' => new \DateTime(),
-            'extra' => array(),
-        );
+            'extra' => [],
+        ];
     }
 }
 
diff --git a/src/Symfony/Bridge/Monolog/Tests/Processor/TokenProcessorTest.php b/src/Symfony/Bridge/Monolog/Tests/Processor/TokenProcessorTest.php
index e78acf47b5..1b01348639 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Processor/TokenProcessorTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Processor/TokenProcessorTest.php
@@ -25,12 +25,12 @@ class TokenProcessorTest extends TestCase
 {
     public function testProcessor()
     {
-        $token = new UsernamePasswordToken('user', 'password', 'provider', array('ROLE_USER'));
+        $token = new UsernamePasswordToken('user', 'password', 'provider', ['ROLE_USER']);
         $tokenStorage = $this->getMockBuilder(TokenStorageInterface::class)->getMock();
         $tokenStorage->method('getToken')->willReturn($token);
 
         $processor = new TokenProcessor($tokenStorage);
-        $record = array('extra' => array());
+        $record = ['extra' => []];
         $record = $processor($record);
 
         $this->assertArrayHasKey('token', $record['extra']);
diff --git a/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php b/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
index c18f857285..6b61b5c986 100644
--- a/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
+++ b/src/Symfony/Bridge/Monolog/Tests/Processor/WebProcessorTest.php
@@ -36,8 +36,8 @@ class WebProcessorTest extends TestCase
 
     public function testUseRequestClientIp()
     {
-        Request::setTrustedProxies(array('192.168.0.1'), Request::HEADER_X_FORWARDED_ALL);
-        list($event, $server) = $this->createRequestEvent(array('X_FORWARDED_FOR' => '192.168.0.2'));
+        Request::setTrustedProxies(['192.168.0.1'], Request::HEADER_X_FORWARDED_ALL);
+        list($event, $server) = $this->createRequestEvent(['X_FORWARDED_FOR' => '192.168.0.2']);
 
         $processor = new WebProcessor();
         $processor->onKernelRequest($event);
@@ -50,7 +50,7 @@ class WebProcessorTest extends TestCase
         $this->assertEquals($server['SERVER_NAME'], $record['extra']['server']);
         $this->assertEquals($server['HTTP_REFERER'], $record['extra']['referrer']);
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     public function testCanBeConstructedWithExtraFields()
@@ -61,7 +61,7 @@ class WebProcessorTest extends TestCase
 
         list($event, $server) = $this->createRequestEvent();
 
-        $processor = new WebProcessor(array('url', 'referrer'));
+        $processor = new WebProcessor(['url', 'referrer']);
         $processor->onKernelRequest($event);
         $record = $processor($this->getRecord());
 
@@ -70,16 +70,16 @@ class WebProcessorTest extends TestCase
         $this->assertEquals($server['HTTP_REFERER'], $record['extra']['referrer']);
     }
 
-    private function createRequestEvent($additionalServerParameters = array()): array
+    private function createRequestEvent($additionalServerParameters = []): array
     {
         $server = array_merge(
-            array(
+            [
                 'REQUEST_URI' => 'A',
                 'REMOTE_ADDR' => '192.168.0.1',
                 'REQUEST_METHOD' => 'C',
                 'SERVER_NAME' => 'D',
                 'HTTP_REFERER' => 'E',
-            ),
+            ],
             $additionalServerParameters
         );
 
@@ -97,20 +97,20 @@ class WebProcessorTest extends TestCase
             ->method('getRequest')
             ->will($this->returnValue($request));
 
-        return array($event, $server);
+        return [$event, $server];
     }
 
     private function getRecord(int $level = Logger::WARNING, string $message = 'test'): array
     {
-        return array(
+        return [
             'message' => $message,
-            'context' => array(),
+            'context' => [],
             'level' => $level,
             'level_name' => Logger::getLevelName($level),
             'channel' => 'test',
             'datetime' => new \DateTime(),
-            'extra' => array(),
-        );
+            'extra' => [],
+        ];
     }
 
     private function isExtraFieldsSupported()
diff --git a/src/Symfony/Bridge/PhpUnit/ClockMock.php b/src/Symfony/Bridge/PhpUnit/ClockMock.php
index 14b482c874..8611c7b222 100644
--- a/src/Symfony/Bridge/PhpUnit/ClockMock.php
+++ b/src/Symfony/Bridge/PhpUnit/ClockMock.php
@@ -83,7 +83,7 @@ class ClockMock
     {
         $self = \get_called_class();
 
-        $mockedNs = array(substr($class, 0, strrpos($class, '\\')));
+        $mockedNs = [substr($class, 0, strrpos($class, '\\'))];
         if (0 < strpos($class, '\\Tests\\')) {
             $ns = str_replace('\\Tests\\', '\\', $class);
             $mockedNs[] = substr($ns, 0, strrpos($ns, '\\'));
diff --git a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
index dc6df3f9b9..d18e161dd9 100644
--- a/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
+++ b/src/Symfony/Bridge/PhpUnit/DeprecationErrorHandler.php
@@ -54,9 +54,9 @@ class DeprecationErrorHandler
             if (false === $mode) {
                 $mode = getenv('SYMFONY_DEPRECATIONS_HELPER');
             }
-            if (DeprecationErrorHandler::MODE_DISABLED !== $mode
-                && DeprecationErrorHandler::MODE_WEAK !== $mode
-                && DeprecationErrorHandler::MODE_WEAK_VENDORS !== $mode
+            if (self::MODE_DISABLED !== $mode
+                && self::MODE_WEAK !== $mode
+                && self::MODE_WEAK_VENDORS !== $mode
                 && (!isset($mode[0]) || '/' !== $mode[0])
             ) {
                 $mode = preg_match('/^[1-9][0-9]*$/', $mode) ? (int) $mode : 0;
@@ -92,21 +92,21 @@ class DeprecationErrorHandler
             return false;
         };
 
-        $deprecations = array(
+        $deprecations = [
             'unsilencedCount' => 0,
             'remainingCount' => 0,
             'legacyCount' => 0,
             'otherCount' => 0,
             'remaining vendorCount' => 0,
-            'unsilenced' => array(),
-            'remaining' => array(),
-            'legacy' => array(),
-            'other' => array(),
-            'remaining vendor' => array(),
-        );
-        $deprecationHandler = function ($type, $msg, $file, $line, $context = array()) use (&$deprecations, $getMode, $UtilPrefix, $inVendors) {
+            'unsilenced' => [],
+            'remaining' => [],
+            'legacy' => [],
+            'other' => [],
+            'remaining vendor' => [],
+        ];
+        $deprecationHandler = function ($type, $msg, $file, $line, $context = []) use (&$deprecations, $getMode, $UtilPrefix, $inVendors) {
             $mode = $getMode();
-            if ((E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) || DeprecationErrorHandler::MODE_DISABLED === $mode) {
+            if ((E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) || self::MODE_DISABLED === $mode) {
                 $ErrorHandler = $UtilPrefix.'ErrorHandler';
 
                 return $ErrorHandler::handleError($type, $msg, $file, $line, $context);
@@ -114,7 +114,7 @@ class DeprecationErrorHandler
 
             $trace = debug_backtrace();
             $group = 'other';
-            $isVendor = DeprecationErrorHandler::MODE_WEAK_VENDORS === $mode && $inVendors($file);
+            $isVendor = self::MODE_WEAK_VENDORS === $mode && $inVendors($file);
 
             $i = \count($trace);
             while (1 < $i && (!isset($trace[--$i]['class']) || ('ReflectionMethod' === $trace[$i]['class'] || 0 === strpos($trace[$i]['class'], 'PHPUnit_') || 0 === strpos($trace[$i]['class'], 'PHPUnit\\')))) {
@@ -131,7 +131,7 @@ class DeprecationErrorHandler
                     // \Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerTrait::endTest()
                     // then we need to use the serialized information to determine
                     // if the error has been triggered from vendor code.
-                    $isVendor = DeprecationErrorHandler::MODE_WEAK_VENDORS === $mode && isset($parsedMsg['triggering_file']) && $inVendors($parsedMsg['triggering_file']);
+                    $isVendor = self::MODE_WEAK_VENDORS === $mode && isset($parsedMsg['triggering_file']) && $inVendors($parsedMsg['triggering_file']);
                 } else {
                     $class = isset($trace[$i]['object']) ? \get_class($trace[$i]['object']) : $trace[$i]['class'];
                     $method = $trace[$i]['function'];
@@ -168,13 +168,13 @@ class DeprecationErrorHandler
 
                     exit(1);
                 }
-                if ('legacy' !== $group && DeprecationErrorHandler::MODE_WEAK !== $mode) {
+                if ('legacy' !== $group && self::MODE_WEAK !== $mode) {
                     $ref = &$deprecations[$group][$msg]['count'];
                     ++$ref;
                     $ref = &$deprecations[$group][$msg][$class.'::'.$method];
                     ++$ref;
                 }
-            } elseif (DeprecationErrorHandler::MODE_WEAK !== $mode) {
+            } elseif (self::MODE_WEAK !== $mode) {
                 $ref = &$deprecations[$group][$msg]['count'];
                 ++$ref;
             }
@@ -184,7 +184,7 @@ class DeprecationErrorHandler
 
         if (null !== $oldErrorHandler) {
             restore_error_handler();
-            if (array($UtilPrefix.'ErrorHandler', 'handleError') === $oldErrorHandler) {
+            if ([$UtilPrefix.'ErrorHandler', 'handleError'] === $oldErrorHandler) {
                 restore_error_handler();
                 self::register($mode);
             }
@@ -207,7 +207,7 @@ class DeprecationErrorHandler
                 $currErrorHandler = set_error_handler('var_dump');
                 restore_error_handler();
 
-                if (DeprecationErrorHandler::MODE_WEAK === $mode) {
+                if (self::MODE_WEAK === $mode) {
                     $colorize = function ($str) { return $str; };
                 }
                 if ($currErrorHandler !== $deprecationHandler) {
@@ -218,8 +218,8 @@ class DeprecationErrorHandler
                     return $b['count'] - $a['count'];
                 };
 
-                $groups = array('unsilenced', 'remaining');
-                if (DeprecationErrorHandler::MODE_WEAK_VENDORS === $mode) {
+                $groups = ['unsilenced', 'remaining'];
+                if (self::MODE_WEAK_VENDORS === $mode) {
                     $groups[] = 'remaining vendor';
                 }
                 array_push($groups, 'legacy', 'other');
@@ -255,11 +255,11 @@ class DeprecationErrorHandler
                 $displayDeprecations($deprecations);
 
                 // store failing status
-                $isFailing = DeprecationErrorHandler::MODE_WEAK !== $mode && $mode < $deprecations['unsilencedCount'] + $deprecations['remainingCount'] + $deprecations['otherCount'];
+                $isFailing = self::MODE_WEAK !== $mode && $mode < $deprecations['unsilencedCount'] + $deprecations['remainingCount'] + $deprecations['otherCount'];
 
                 // reset deprecations array
                 foreach ($deprecations as $group => $arrayOrInt) {
-                    $deprecations[$group] = \is_int($arrayOrInt) ? 0 : array();
+                    $deprecations[$group] = \is_int($arrayOrInt) ? 0 : [];
                 }
 
                 register_shutdown_function(function () use (&$deprecations, $isFailing, $displayDeprecations, $mode) {
@@ -270,7 +270,7 @@ class DeprecationErrorHandler
                         }
                     }
                     $displayDeprecations($deprecations);
-                    if ($isFailing || DeprecationErrorHandler::MODE_WEAK !== $mode && $mode < $deprecations['unsilencedCount'] + $deprecations['remainingCount'] + $deprecations['otherCount']) {
+                    if ($isFailing || self::MODE_WEAK !== $mode && $mode < $deprecations['unsilencedCount'] + $deprecations['remainingCount'] + $deprecations['otherCount']) {
                         exit(1);
                     }
                 });
@@ -280,8 +280,8 @@ class DeprecationErrorHandler
 
     public static function collectDeprecations($outputFile)
     {
-        $deprecations = array();
-        $previousErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = array()) use (&$deprecations, &$previousErrorHandler) {
+        $deprecations = [];
+        $previousErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$deprecations, &$previousErrorHandler) {
             if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
                 if ($previousErrorHandler) {
                     return $previousErrorHandler($type, $msg, $file, $line, $context);
@@ -293,7 +293,7 @@ class DeprecationErrorHandler
 
                 return $ErrorHandler::handleError($type, $msg, $file, $line, $context);
             }
-            $deprecations[] = array(error_reporting(), $msg, $file);
+            $deprecations[] = [error_reporting(), $msg, $file];
         });
 
         register_shutdown_function(function () use ($outputFile, &$deprecations) {
diff --git a/src/Symfony/Bridge/PhpUnit/DnsMock.php b/src/Symfony/Bridge/PhpUnit/DnsMock.php
index 790cfa91af..a58bf2efcd 100644
--- a/src/Symfony/Bridge/PhpUnit/DnsMock.php
+++ b/src/Symfony/Bridge/PhpUnit/DnsMock.php
@@ -16,8 +16,8 @@ namespace Symfony\Bridge\PhpUnit;
  */
 class DnsMock
 {
-    private static $hosts = array();
-    private static $dnsTypes = array(
+    private static $hosts = [];
+    private static $dnsTypes = [
         'A' => DNS_A,
         'MX' => DNS_MX,
         'NS' => DNS_NS,
@@ -30,7 +30,7 @@ class DnsMock
         'NAPTR' => DNS_NAPTR,
         'TXT' => DNS_TXT,
         'HINFO' => DNS_HINFO,
-    );
+    ];
 
     /**
      * Configures the mock values for DNS queries.
@@ -68,7 +68,7 @@ class DnsMock
         if (!self::$hosts) {
             return \getmxrr($hostname, $mxhosts, $weight);
         }
-        $mxhosts = $weight = array();
+        $mxhosts = $weight = [];
 
         if (isset(self::$hosts[$hostname])) {
             foreach (self::$hosts[$hostname] as $record) {
@@ -125,7 +125,7 @@ class DnsMock
         $ips = false;
 
         if (isset(self::$hosts[$hostname])) {
-            $ips = array();
+            $ips = [];
 
             foreach (self::$hosts[$hostname] as $record) {
                 if ('A' === $record['type']) {
@@ -149,11 +149,11 @@ class DnsMock
             if (DNS_ANY === $type) {
                 $type = DNS_ALL;
             }
-            $records = array();
+            $records = [];
 
             foreach (self::$hosts[$hostname] as $record) {
                 if (isset(self::$dnsTypes[$record['type']]) && (self::$dnsTypes[$record['type']] & $type)) {
-                    $records[] = array_merge(array('host' => $hostname, 'class' => 'IN', 'ttl' => 1, 'type' => $record['type']), $record);
+                    $records[] = array_merge(['host' => $hostname, 'class' => 'IN', 'ttl' => 1, 'type' => $record['type']], $record);
                 }
             }
         }
@@ -165,7 +165,7 @@ class DnsMock
     {
         $self = \get_called_class();
 
-        $mockedNs = array(substr($class, 0, strrpos($class, '\\')));
+        $mockedNs = [substr($class, 0, strrpos($class, '\\'))];
         if (0 < strpos($class, '\\Tests\\')) {
             $ns = str_replace('\\Tests\\', '\\', $class);
             $mockedNs[] = substr($ns, 0, strrpos($ns, '\\'));
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/CoverageListenerTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/CoverageListenerTrait.php
index 8e9bdbe92e..07a9679d13 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/CoverageListenerTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/CoverageListenerTrait.php
@@ -31,7 +31,7 @@ class CoverageListenerTrait
     {
         $this->sutFqcnResolver = $sutFqcnResolver;
         $this->warningOnSutNotFound = $warningOnSutNotFound;
-        $this->warnings = array();
+        $this->warnings = [];
     }
 
     public function startTest($test)
@@ -42,7 +42,7 @@ class CoverageListenerTrait
 
         $annotations = $test->getAnnotations();
 
-        $ignoredAnnotations = array('covers', 'coversDefaultClass', 'coversNothing');
+        $ignoredAnnotations = ['covers', 'coversDefaultClass', 'coversNothing'];
 
         foreach ($ignoredAnnotations as $annotation) {
             if (isset($annotations['class'][$annotation]) || isset($annotations['method'][$annotation])) {
@@ -74,11 +74,11 @@ class CoverageListenerTrait
         $r->setAccessible(true);
 
         $cache = $r->getValue();
-        $cache = array_replace_recursive($cache, array(
-            \get_class($test) => array(
-                'covers' => array($sutFqcn),
-            ),
-        ));
+        $cache = array_replace_recursive($cache, [
+            \get_class($test) => [
+                'covers' => [$sutFqcn],
+            ],
+        ]);
         $r->setValue($testClass, $cache);
     }
 
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV5.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV5.php
index 2da40f2c20..c825a8ddb2 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV5.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV5.php
@@ -22,7 +22,7 @@ class SymfonyTestsListenerForV5 extends \PHPUnit_Framework_BaseTestListener
 {
     private $trait;
 
-    public function __construct(array $mockedNamespaces = array())
+    public function __construct(array $mockedNamespaces = [])
     {
         $this->trait = new SymfonyTestsListenerTrait($mockedNamespaces);
     }
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV6.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV6.php
index 5b864bfe58..0c0b57080e 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV6.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV6.php
@@ -27,7 +27,7 @@ class SymfonyTestsListenerForV6 extends BaseTestListener
 {
     private $trait;
 
-    public function __construct(array $mockedNamespaces = array())
+    public function __construct(array $mockedNamespaces = [])
     {
         $this->trait = new SymfonyTestsListenerTrait($mockedNamespaces);
     }
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV7.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV7.php
index 18bbdbeba0..25ad718a80 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV7.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerForV7.php
@@ -30,7 +30,7 @@ class SymfonyTestsListenerForV7 implements TestListener
 
     private $trait;
 
-    public function __construct(array $mockedNamespaces = array())
+    public function __construct(array $mockedNamespaces = [])
     {
         $this->trait = new SymfonyTestsListenerTrait($mockedNamespaces);
     }
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
index b527e03966..5f21945900 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/SymfonyTestsListenerTrait.php
@@ -32,10 +32,10 @@ class SymfonyTestsListenerTrait
     private static $globallyEnabled = false;
     private $state = -1;
     private $skippedFile = false;
-    private $wasSkipped = array();
-    private $isSkipped = array();
-    private $expectedDeprecations = array();
-    private $gatheredDeprecations = array();
+    private $wasSkipped = [];
+    private $isSkipped = [];
+    private $expectedDeprecations = [];
+    private $gatheredDeprecations = [];
     private $previousErrorHandler;
     private $testsWithWarnings;
     private $reportUselessTests;
@@ -45,7 +45,7 @@ class SymfonyTestsListenerTrait
     /**
      * @param array $mockedNamespaces List of namespaces, indexed by mocked features (time-sensitive or dns-sensitive)
      */
-    public function __construct(array $mockedNamespaces = array())
+    public function __construct(array $mockedNamespaces = [])
     {
         if (class_exists('PHPUnit_Util_Blacklist')) {
             \PHPUnit_Util_Blacklist::$blacklistedClassNames['\Symfony\Bridge\PhpUnit\Legacy\SymfonyTestsListenerTrait'] = 2;
@@ -57,7 +57,7 @@ class SymfonyTestsListenerTrait
 
         foreach ($mockedNamespaces as $type => $namespaces) {
             if (!\is_array($namespaces)) {
-                $namespaces = array($namespaces);
+                $namespaces = [$namespaces];
             }
             if ('time-sensitive' === $type) {
                 foreach ($namespaces as $ns) {
@@ -104,7 +104,7 @@ class SymfonyTestsListenerTrait
             $Test = 'PHPUnit\Util\Test';
         }
         $suiteName = $suite->getName();
-        $this->testsWithWarnings = array();
+        $this->testsWithWarnings = [];
 
         foreach ($suite->tests() as $test) {
             if (!($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)) {
@@ -135,11 +135,11 @@ class SymfonyTestsListenerTrait
 
                     if (!$this->wasSkipped = require $this->skippedFile) {
                         echo "All tests already ran successfully.\n";
-                        $suite->setTests(array());
+                        $suite->setTests([]);
                     }
                 }
             }
-            $testSuites = array($suite);
+            $testSuites = [$suite];
             for ($i = 0; isset($testSuites[$i]); ++$i) {
                 foreach ($testSuites[$i]->tests() as $test) {
                     if ($test instanceof \PHPUnit_Framework_TestSuite || $test instanceof TestSuite) {
@@ -158,7 +158,7 @@ class SymfonyTestsListenerTrait
                 }
             }
         } elseif (2 === $this->state) {
-            $skipped = array();
+            $skipped = [];
             foreach ($suite->tests() as $test) {
                 if (!($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)
                     || isset($this->wasSkipped[$suiteName]['*'])
@@ -230,7 +230,7 @@ class SymfonyTestsListenerTrait
                 $test->getTestResultObject()->beStrictAboutTestsThatDoNotTestAnything(false);
 
                 $this->expectedDeprecations = $annotations['method']['expectedDeprecation'];
-                $this->previousErrorHandler = set_error_handler(array($this, 'handleError'));
+                $this->previousErrorHandler = set_error_handler([$this, 'handleError']);
             }
         }
     }
@@ -271,8 +271,8 @@ class SymfonyTestsListenerTrait
             $deprecations = file_get_contents($this->runsInSeparateProcess);
             unlink($this->runsInSeparateProcess);
             putenv('SYMFONY_DEPRECATIONS_SERIALIZE');
-            foreach ($deprecations ? unserialize($deprecations) : array() as $deprecation) {
-                $error = serialize(array('deprecation' => $deprecation[1], 'class' => $className, 'method' => $test->getName(false), 'triggering_file' => isset($deprecation[2]) ? $deprecation[2] : null));
+            foreach ($deprecations ? unserialize($deprecations) : [] as $deprecation) {
+                $error = serialize(['deprecation' => $deprecation[1], 'class' => $className, 'method' => $test->getName(false), 'triggering_file' => isset($deprecation[2]) ? $deprecation[2] : null]);
                 if ($deprecation[0]) {
                     @trigger_error($error, E_USER_DEPRECATED);
                 } else {
@@ -283,13 +283,13 @@ class SymfonyTestsListenerTrait
         }
 
         if ($this->expectedDeprecations) {
-            if (!\in_array($test->getStatus(), array($BaseTestRunner::STATUS_SKIPPED, $BaseTestRunner::STATUS_INCOMPLETE), true)) {
+            if (!\in_array($test->getStatus(), [$BaseTestRunner::STATUS_SKIPPED, $BaseTestRunner::STATUS_INCOMPLETE], true)) {
                 $test->addToAssertionCount(\count($this->expectedDeprecations));
             }
 
             restore_error_handler();
 
-            if (!$errored && !\in_array($test->getStatus(), array($BaseTestRunner::STATUS_SKIPPED, $BaseTestRunner::STATUS_INCOMPLETE, $BaseTestRunner::STATUS_FAILURE, $BaseTestRunner::STATUS_ERROR), true)) {
+            if (!$errored && !\in_array($test->getStatus(), [$BaseTestRunner::STATUS_SKIPPED, $BaseTestRunner::STATUS_INCOMPLETE, $BaseTestRunner::STATUS_FAILURE, $BaseTestRunner::STATUS_ERROR], true)) {
                 try {
                     $prefix = "@expectedDeprecation:\n";
                     $test->assertStringMatchesFormat($prefix.'%A  '.implode("\n%A  ", $this->expectedDeprecations)."\n%A", $prefix.'  '.implode("\n  ", $this->gatheredDeprecations)."\n");
@@ -300,7 +300,7 @@ class SymfonyTestsListenerTrait
                 }
             }
 
-            $this->expectedDeprecations = $this->gatheredDeprecations = array();
+            $this->expectedDeprecations = $this->gatheredDeprecations = [];
             $this->previousErrorHandler = null;
         }
         if (!$this->runsInSeparateProcess && -2 < $this->state && ($test instanceof \PHPUnit\Framework\TestCase || $test instanceof TestCase)) {
@@ -308,12 +308,12 @@ class SymfonyTestsListenerTrait
                 ClockMock::withClockMock(false);
             }
             if (\in_array('dns-sensitive', $groups, true)) {
-                DnsMock::withMockedHosts(array());
+                DnsMock::withMockedHosts([]);
             }
         }
     }
 
-    public function handleError($type, $msg, $file, $line, $context = array())
+    public function handleError($type, $msg, $file, $line, $context = [])
     {
         if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
             $h = $this->previousErrorHandler;
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV5.php b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV5.php
index 7897861cf5..1a89019fe3 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV5.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV5.php
@@ -27,7 +27,7 @@ class TestRunnerForV5 extends \PHPUnit_TextUI_TestRunner
 
         $result = parent::handleConfiguration($arguments);
 
-        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : array();
+        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : [];
 
         $registeredLocally = false;
 
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV6.php b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV6.php
index 6da7c65448..8489a58627 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV6.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV6.php
@@ -30,7 +30,7 @@ class TestRunnerForV6 extends BaseRunner
 
         parent::handleConfiguration($arguments);
 
-        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : array();
+        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : [];
 
         $registeredLocally = false;
 
diff --git a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV7.php b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV7.php
index a175fb65d7..bc5fff95ba 100644
--- a/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV7.php
+++ b/src/Symfony/Bridge/PhpUnit/Legacy/TestRunnerForV7.php
@@ -30,7 +30,7 @@ class TestRunnerForV7 extends BaseRunner
 
         parent::handleConfiguration($arguments);
 
-        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : array();
+        $arguments['listeners'] = isset($arguments['listeners']) ? $arguments['listeners'] : [];
 
         $registeredLocally = false;
 
diff --git a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/default.phpt b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/default.phpt
index 7a0595a7dd..9bc155a7cd 100644
--- a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/default.phpt
+++ b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/default.phpt
@@ -25,7 +25,7 @@ class Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 EOPHP
@@ -35,7 +35,7 @@ class PHPUnit_Util_Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 
diff --git a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/fake_vendor/acme/lib/deprecation_riddled.php b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/fake_vendor/acme/lib/deprecation_riddled.php
index 16a58246d2..5229a7a7cc 100644
--- a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/fake_vendor/acme/lib/deprecation_riddled.php
+++ b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/fake_vendor/acme/lib/deprecation_riddled.php
@@ -7,7 +7,7 @@ class Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 EOPHP
diff --git a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/shutdown_deprecations.phpt b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/shutdown_deprecations.phpt
index fddeed6085..703db6fd19 100644
--- a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/shutdown_deprecations.phpt
+++ b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/shutdown_deprecations.phpt
@@ -25,7 +25,7 @@ class Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 EOPHP
@@ -35,7 +35,7 @@ class PHPUnit_Util_Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 
diff --git a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/weak_vendors_on_non_vendor.phpt b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/weak_vendors_on_non_vendor.phpt
index e20c7adf6b..b37b623cf2 100644
--- a/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/weak_vendors_on_non_vendor.phpt
+++ b/src/Symfony/Bridge/PhpUnit/Tests/DeprecationErrorHandler/weak_vendors_on_non_vendor.phpt
@@ -25,7 +25,7 @@ class Test
 {
     public static function getGroups()
     {
-        return array();
+        return [];
     }
 }
 EOPHP
diff --git a/src/Symfony/Bridge/PhpUnit/Tests/DnsMockTest.php b/src/Symfony/Bridge/PhpUnit/Tests/DnsMockTest.php
index a178ac7e89..ebbc87a770 100644
--- a/src/Symfony/Bridge/PhpUnit/Tests/DnsMockTest.php
+++ b/src/Symfony/Bridge/PhpUnit/Tests/DnsMockTest.php
@@ -18,15 +18,15 @@ class DnsMockTest extends TestCase
 {
     protected function tearDown()
     {
-        DnsMock::withMockedHosts(array());
+        DnsMock::withMockedHosts([]);
     }
 
     public function testCheckdnsrr()
     {
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => 'MX'))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => 'MX']]]);
         $this->assertTrue(DnsMock::checkdnsrr('example.com'));
 
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => 'A'))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => 'A']]]);
         $this->assertFalse(DnsMock::checkdnsrr('example.com'));
         $this->assertTrue(DnsMock::checkdnsrr('example.com', 'a'));
         $this->assertTrue(DnsMock::checkdnsrr('example.com', 'any'));
@@ -35,34 +35,34 @@ class DnsMockTest extends TestCase
 
     public function testGetmxrr()
     {
-        DnsMock::withMockedHosts(array(
-            'example.com' => array(array(
+        DnsMock::withMockedHosts([
+            'example.com' => [[
                 'type' => 'MX',
                 'host' => 'mx.example.com',
                 'pri' => 10,
-            )),
-        ));
+            ]],
+        ]);
 
         $this->assertFalse(DnsMock::getmxrr('foobar.com', $mxhosts, $weight));
         $this->assertTrue(DnsMock::getmxrr('example.com', $mxhosts, $weight));
-        $this->assertSame(array('mx.example.com'), $mxhosts);
-        $this->assertSame(array(10), $weight);
+        $this->assertSame(['mx.example.com'], $mxhosts);
+        $this->assertSame([10], $weight);
     }
 
     public function testGethostbyaddr()
     {
-        DnsMock::withMockedHosts(array(
-            'example.com' => array(
-                array(
+        DnsMock::withMockedHosts([
+            'example.com' => [
+                [
                     'type' => 'A',
                     'ip' => '1.2.3.4',
-                ),
-                array(
+                ],
+                [
                     'type' => 'AAAA',
                     'ipv6' => '::12',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $this->assertSame('::21', DnsMock::gethostbyaddr('::21'));
         $this->assertSame('example.com', DnsMock::gethostbyaddr('::12'));
@@ -71,18 +71,18 @@ class DnsMockTest extends TestCase
 
     public function testGethostbyname()
     {
-        DnsMock::withMockedHosts(array(
-            'example.com' => array(
-                array(
+        DnsMock::withMockedHosts([
+            'example.com' => [
+                [
                     'type' => 'AAAA',
                     'ipv6' => '::12',
-                ),
-                array(
+                ],
+                [
                     'type' => 'A',
                     'ip' => '1.2.3.4',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $this->assertSame('foobar.com', DnsMock::gethostbyname('foobar.com'));
         $this->assertSame('1.2.3.4', DnsMock::gethostbyname('example.com'));
@@ -90,59 +90,59 @@ class DnsMockTest extends TestCase
 
     public function testGethostbynamel()
     {
-        DnsMock::withMockedHosts(array(
-            'example.com' => array(
-                array(
+        DnsMock::withMockedHosts([
+            'example.com' => [
+                [
                     'type' => 'A',
                     'ip' => '1.2.3.4',
-                ),
-                array(
+                ],
+                [
                     'type' => 'A',
                     'ip' => '2.3.4.5',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $this->assertFalse(DnsMock::gethostbynamel('foobar.com'));
-        $this->assertSame(array('1.2.3.4', '2.3.4.5'), DnsMock::gethostbynamel('example.com'));
+        $this->assertSame(['1.2.3.4', '2.3.4.5'], DnsMock::gethostbynamel('example.com'));
     }
 
     public function testDnsGetRecord()
     {
-        DnsMock::withMockedHosts(array(
-            'example.com' => array(
-                array(
+        DnsMock::withMockedHosts([
+            'example.com' => [
+                [
                     'type' => 'A',
                     'ip' => '1.2.3.4',
-                ),
-                array(
+                ],
+                [
                     'type' => 'PTR',
                     'ip' => '2.3.4.5',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
-        $records = array(
-            array(
+        $records = [
+            [
                 'host' => 'example.com',
                 'class' => 'IN',
                 'ttl' => 1,
                 'type' => 'A',
                 'ip' => '1.2.3.4',
-            ),
-            $ptr = array(
+            ],
+            $ptr = [
                 'host' => 'example.com',
                 'class' => 'IN',
                 'ttl' => 1,
                 'type' => 'PTR',
                 'ip' => '2.3.4.5',
-            ),
-        );
+            ],
+        ];
 
         $this->assertFalse(DnsMock::dns_get_record('foobar.com'));
         $this->assertSame($records, DnsMock::dns_get_record('example.com'));
         $this->assertSame($records, DnsMock::dns_get_record('example.com', DNS_ALL));
         $this->assertSame($records, DnsMock::dns_get_record('example.com', DNS_A | DNS_PTR));
-        $this->assertSame(array($ptr), DnsMock::dns_get_record('example.com', DNS_PTR));
+        $this->assertSame([$ptr], DnsMock::dns_get_record('example.com', DNS_PTR));
     }
 }
diff --git a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
index 6ccd5d33ce..b650027e92 100755
--- a/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
+++ b/src/Symfony/Bridge/PhpUnit/bin/simple-phpunit
@@ -114,7 +114,7 @@ if (!file_exists("$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit") || md5_file(__
     $prevRoot = getenv('COMPOSER_ROOT_VERSION');
     putenv("COMPOSER_ROOT_VERSION=$PHPUNIT_VERSION.99");
     // --no-suggest is not in the list to keep compat with composer 1.0, which is shipped with Ubuntu 16.04LTS
-    $exit = proc_close(proc_open("$COMPOSER install --no-dev --prefer-dist --no-progress --ansi", array(), $p, getcwd(), null, array('bypass_shell' => true)));
+    $exit = proc_close(proc_open("$COMPOSER install --no-dev --prefer-dist --no-progress --ansi", [], $p, getcwd(), null, ['bypass_shell' => true]));
     putenv('COMPOSER_ROOT_VERSION'.(false !== $prevRoot ? '='.$prevRoot : ''));
     if ($exit) {
         exit($exit);
@@ -147,9 +147,9 @@ EOPHP
 }
 
 global $argv, $argc;
-$argv = isset($_SERVER['argv']) ? $_SERVER['argv'] : array();
+$argv = isset($_SERVER['argv']) ? $_SERVER['argv'] : [];
 $argc = isset($_SERVER['argc']) ? $_SERVER['argc'] : 0;
-$components = array();
+$components = [];
 $cmd = array_map('escapeshellarg', $argv);
 $exit = 0;
 
@@ -184,7 +184,7 @@ if ('\\' === DIRECTORY_SEPARATOR) {
 
 if ($components) {
     $skippedTests = isset($_SERVER['SYMFONY_PHPUNIT_SKIPPED_TESTS']) ? $_SERVER['SYMFONY_PHPUNIT_SKIPPED_TESTS'] : false;
-    $runningProcs = array();
+    $runningProcs = [];
 
     foreach ($components as $component) {
         // Run phpunit tests in parallel
@@ -195,7 +195,7 @@ if ($components) {
 
         $c = escapeshellarg($component);
 
-        if ($proc = proc_open(sprintf($cmd, $c, " > $c/phpunit.stdout 2> $c/phpunit.stderr"), array(), $pipes)) {
+        if ($proc = proc_open(sprintf($cmd, $c, " > $c/phpunit.stdout 2> $c/phpunit.stderr"), [], $pipes)) {
             $runningProcs[$component] = $proc;
         } else {
             $exit = 1;
@@ -205,7 +205,7 @@ if ($components) {
 
     while ($runningProcs) {
         usleep(300000);
-        $terminatedProcs = array();
+        $terminatedProcs = [];
         foreach ($runningProcs as $component => $proc) {
             $procStatus = proc_get_status($proc);
             if (!$procStatus['running']) {
@@ -216,7 +216,7 @@ if ($components) {
         }
 
         foreach ($terminatedProcs as $component => $procStatus) {
-            foreach (array('out', 'err') as $file) {
+            foreach (['out', 'err'] as $file) {
                 $file = "$component/phpunit.std$file";
                 readfile($file);
                 unlink($file);
@@ -226,7 +226,7 @@ if ($components) {
             // STATUS_STACK_BUFFER_OVERRUN (-1073740791/0xC0000409)
             // STATUS_ACCESS_VIOLATION (-1073741819/0xC0000005)
             // STATUS_HEAP_CORRUPTION (-1073740940/0xC0000374)
-            if ($procStatus && ('\\' !== DIRECTORY_SEPARATOR || !extension_loaded('apcu') || !filter_var(ini_get('apc.enable_cli'), FILTER_VALIDATE_BOOLEAN) || !in_array($procStatus, array(-1073740791, -1073741819, -1073740940)))) {
+            if ($procStatus && ('\\' !== DIRECTORY_SEPARATOR || !extension_loaded('apcu') || !filter_var(ini_get('apc.enable_cli'), FILTER_VALIDATE_BOOLEAN) || !in_array($procStatus, [-1073740791, -1073741819, -1073740940]))) {
                 $exit = $procStatus;
                 echo "\033[41mKO\033[0m $component\n\n";
             } else {
@@ -238,7 +238,7 @@ if ($components) {
     if (!class_exists('SymfonyBlacklistSimplePhpunit', false)) {
         class SymfonyBlacklistSimplePhpunit {}
     }
-    array_splice($argv, 1, 0, array('--colors=always'));
+    array_splice($argv, 1, 0, ['--colors=always']);
     $_SERVER['argv'] = $argv;
     $_SERVER['argc'] = ++$argc;
     include "$PHPUNIT_DIR/phpunit-$PHPUNIT_VERSION/phpunit";
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
index 7c74641333..647d1667c3 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Dumper/PhpDumperTest.php
@@ -69,6 +69,6 @@ class PhpDumperTest extends TestCase
 
         $dumper->setProxyDumper(new ProxyDumper());
 
-        return $dumper->dump(array('class' => 'LazyServiceProjectServiceContainer'));
+        return $dumper->dump(['class' => 'LazyServiceProjectServiceContainer']);
     }
 }
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Fixtures/includes/foo.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Fixtures/includes/foo.php
index 8ffc5be9af..435e9a4d77 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Fixtures/includes/foo.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/Fixtures/includes/foo.php
@@ -11,14 +11,14 @@ class ProxyManagerBridgeFooClass
     public $initialized = false;
     public $configured = false;
     public $called = false;
-    public $arguments = array();
+    public $arguments = [];
 
-    public function __construct($arguments = array())
+    public function __construct($arguments = [])
     {
         $this->arguments = $arguments;
     }
 
-    public static function getInstance($arguments = array())
+    public static function getInstance($arguments = [])
     {
         $obj = new self($arguments);
         $obj->called = true;
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/Fixtures/proxy-factory.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/Fixtures/proxy-factory.php
index 648eb36d4b..af3b972cdf 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/Fixtures/proxy-factory.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/Fixtures/proxy-factory.php
@@ -3,7 +3,7 @@
 return new class
 {
     public $proxyClass;
-    private $privates = array();
+    private $privates = [];
 
     public function getFooService($lazyLoad = true)
     {
diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
index b1dc1cf66a..984e2e2a1b 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
@@ -94,18 +94,18 @@ class ProxyDumperTest extends TestCase
 
     public function getPrivatePublicDefinitions()
     {
-        return array(
-            array(
+        return [
+            [
                 (new Definition(__CLASS__))
                     ->setPublic(false),
                 'privates',
-            ),
-            array(
+            ],
+            [
                 (new Definition(__CLASS__))
                     ->setPublic(true),
                 'services',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -125,8 +125,8 @@ class ProxyDumperTest extends TestCase
         $definition = new Definition($class);
 
         $definition->setLazy(true);
-        $definition->addTag('proxy', array('interface' => DummyInterface::class));
-        $definition->addTag('proxy', array('interface' => SunnyInterface::class));
+        $definition->addTag('proxy', ['interface' => DummyInterface::class]);
+        $definition->addTag('proxy', ['interface' => SunnyInterface::class]);
 
         $implem = "<?php\n\n".$this->dumper->getProxyCode($definition);
         $factory = $this->dumper->getProxyFactoryCode($definition, 'foo', '$this->getFooService(false)');
@@ -136,7 +136,7 @@ class ProxyDumperTest extends TestCase
 return new class
 {
     public \$proxyClass;
-    private \$privates = array();
+    private \$privates = [];
 
     public function getFooService(\$lazyLoad = true)
     {
@@ -179,12 +179,12 @@ EOPHP;
      */
     public function getProxyCandidates()
     {
-        $definitions = array(
-            array(new Definition(__CLASS__), true),
-            array(new Definition('stdClass'), true),
-            array(new Definition(uniqid('foo', true)), false),
-            array(new Definition(), false),
-        );
+        $definitions = [
+            [new Definition(__CLASS__), true],
+            [new Definition('stdClass'), true],
+            [new Definition(uniqid('foo', true)), false],
+            [new Definition(), false],
+        ];
 
         array_map(
             function ($definition) {
diff --git a/src/Symfony/Bridge/Twig/AppVariable.php b/src/Symfony/Bridge/Twig/AppVariable.php
index 702edcbcea..21020270a0 100644
--- a/src/Symfony/Bridge/Twig/AppVariable.php
+++ b/src/Symfony/Bridge/Twig/AppVariable.php
@@ -150,7 +150,7 @@ class AppVariable
      * Returns some or all the existing flash messages:
      *  * getFlashes() returns all the flash messages
      *  * getFlashes('notice') returns a simple array with flash messages of that type
-     *  * getFlashes(array('notice', 'error')) returns a nested array of type => messages.
+     *  * getFlashes(['notice', 'error']) returns a nested array of type => messages.
      *
      * @return array
      */
@@ -159,13 +159,13 @@ class AppVariable
         try {
             $session = $this->getSession();
             if (null === $session) {
-                return array();
+                return [];
             }
         } catch (\RuntimeException $e) {
-            return array();
+            return [];
         }
 
-        if (null === $types || '' === $types || array() === $types) {
+        if (null === $types || '' === $types || [] === $types) {
             return $session->getFlashBag()->all();
         }
 
@@ -173,7 +173,7 @@ class AppVariable
             return $session->getFlashBag()->get($types);
         }
 
-        $result = array();
+        $result = [];
         foreach ($types as $type) {
             $result[$type] = $session->getFlashBag()->get($type);
         }
diff --git a/src/Symfony/Bridge/Twig/CHANGELOG.md b/src/Symfony/Bridge/Twig/CHANGELOG.md
index 341bcfa538..2982e6b66f 100644
--- a/src/Symfony/Bridge/Twig/CHANGELOG.md
+++ b/src/Symfony/Bridge/Twig/CHANGELOG.md
@@ -45,7 +45,7 @@ CHANGELOG
    use Symfony\Bridge\Twig\Form\TwigRendererEngine;
 
    // ...
-   $rendererEngine = new TwigRendererEngine(array('form_div_layout.html.twig'));
+   $rendererEngine = new TwigRendererEngine(['form_div_layout.html.twig']);
    $rendererEngine->setEnvironment($twig);
    $twig->addExtension(new FormExtension(new TwigRenderer($rendererEngine, $csrfTokenManager)));
    ```
@@ -54,13 +54,13 @@ CHANGELOG
 
    ```php
    // ...
-   $rendererEngine = new TwigRendererEngine(array('form_div_layout.html.twig'), $twig);
+   $rendererEngine = new TwigRendererEngine(['form_div_layout.html.twig'], $twig);
    // require Twig 1.30+
-   $twig->addRuntimeLoader(new \Twig\RuntimeLoader\FactoryRuntimeLoader(array(
+   $twig->addRuntimeLoader(new \Twig\RuntimeLoader\FactoryRuntimeLoader([
        TwigRenderer::class => function () use ($rendererEngine, $csrfTokenManager) {
            return new TwigRenderer($rendererEngine, $csrfTokenManager);
        },
-   )));
+   ]));
    $twig->addExtension(new FormExtension());
    ```
  * Deprecated the `TwigRendererEngineInterface` interface.
diff --git a/src/Symfony/Bridge/Twig/Command/DebugCommand.php b/src/Symfony/Bridge/Twig/Command/DebugCommand.php
index e9d9eda30e..5ff57e1cf4 100644
--- a/src/Symfony/Bridge/Twig/Command/DebugCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/DebugCommand.php
@@ -37,7 +37,7 @@ class DebugCommand extends Command
     private $twigDefaultPath;
     private $rootDir;
 
-    public function __construct(Environment $twig, string $projectDir = null, array $bundlesMetadata = array(), string $twigDefaultPath = null, string $rootDir = null)
+    public function __construct(Environment $twig, string $projectDir = null, array $bundlesMetadata = [], string $twigDefaultPath = null, string $rootDir = null)
     {
         parent::__construct();
 
@@ -51,11 +51,11 @@ class DebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::OPTIONAL, 'The template name'),
                 new InputOption('filter', null, InputOption::VALUE_REQUIRED, 'Show details for all entries matching this filter'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (text or json)', 'text'),
-            ))
+            ])
             ->setDescription('Shows a list of twig functions, filters, globals and tests')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command outputs a list of twig functions,
@@ -115,11 +115,11 @@ EOF
                 $io->listing($files);
             }
         } else {
-            $alternatives = array();
+            $alternatives = [];
 
             if ($paths) {
-                $shortnames = array();
-                $dirs = array();
+                $shortnames = [];
+                $dirs = [];
                 foreach (current($paths) as $path) {
                     $dirs[] = $this->isAbsolutePath($path) ? $path : $this->projectDir.'/'.$path;
                 }
@@ -141,9 +141,9 @@ EOF
 
         $io->section('Configured Paths');
         if ($paths) {
-            $io->table(array('Namespace', 'Paths'), $this->buildTableRows($paths));
+            $io->table(['Namespace', 'Paths'], $this->buildTableRows($paths));
         } else {
-            $alternatives = array();
+            $alternatives = [];
             $namespace = $this->parseTemplateName($name)[0];
 
             if (FilesystemLoader::MAIN_NAMESPACE === $namespace) {
@@ -159,7 +159,7 @@ EOF
             $this->error($io, $message, $alternatives);
 
             if (!$alternatives && $paths = $this->getLoaderPaths()) {
-                $io->table(array('Namespace', 'Paths'), $this->buildTableRows($paths));
+                $io->table(['Namespace', 'Paths'], $this->buildTableRows($paths));
             }
         }
     }
@@ -184,9 +184,9 @@ EOF
 
     private function displayGeneralText(SymfonyStyle $io, string $filter = null)
     {
-        $types = array('functions', 'filters', 'tests', 'globals');
+        $types = ['functions', 'filters', 'tests', 'globals'];
         foreach ($types as $index => $type) {
-            $items = array();
+            $items = [];
             foreach ($this->twig->{'get'.ucfirst($type)}() as $name => $entity) {
                 if (!$filter || false !== strpos($name, $filter)) {
                     $items[$name] = $name.$this->getPrettyMetadata($type, $entity);
@@ -205,7 +205,7 @@ EOF
 
         if (!$filter && $paths = $this->getLoaderPaths()) {
             $io->section('Loader Paths');
-            $io->table(array('Namespace', 'Paths'), $this->buildTableRows($paths));
+            $io->table(['Namespace', 'Paths'], $this->buildTableRows($paths));
         }
 
         if ($wrongBundles = $this->findWrongBundleOverrides()) {
@@ -217,8 +217,8 @@ EOF
 
     private function displayGeneralJson(SymfonyStyle $io, $filter)
     {
-        $types = array('functions', 'filters', 'tests', 'globals');
-        $data = array();
+        $types = ['functions', 'filters', 'tests', 'globals'];
+        $data = [];
         foreach ($types as $type) {
             foreach ($this->twig->{'get'.ucfirst($type)}() as $name => $entity) {
                 if (!$filter || false !== strpos($name, $filter)) {
@@ -245,15 +245,15 @@ EOF
     {
         /** @var FilesystemLoader $loader */
         $loader = $this->twig->getLoader();
-        $loaderPaths = array();
+        $loaderPaths = [];
         $namespaces = $loader->getNamespaces();
         if (null !== $name) {
             $namespace = $this->parseTemplateName($name)[0];
-            $namespaces = array_intersect(array($namespace), $namespaces);
+            $namespaces = array_intersect([$namespace], $namespaces);
         }
 
         foreach ($namespaces as $namespace) {
-            $paths = array_map(array($this, 'getRelativePath'), $loader->getPaths($namespace));
+            $paths = array_map([$this, 'getRelativePath'], $loader->getPaths($namespace));
 
             if (FilesystemLoader::MAIN_NAMESPACE === $namespace) {
                 $namespace = '(None)';
@@ -357,8 +357,8 @@ EOF
 
     private function findWrongBundleOverrides(): array
     {
-        $alternatives = array();
-        $bundleNames = array();
+        $alternatives = [];
+        $bundleNames = [];
 
         if ($this->rootDir && $this->projectDir) {
             $folders = glob($this->rootDir.'/Resources/*/views', GLOB_ONLYDIR);
@@ -391,7 +391,7 @@ EOF
         }
 
         if ($notFoundBundles = array_diff_key($bundleNames, $this->bundlesMetadata)) {
-            $alternatives = array();
+            $alternatives = [];
             foreach ($notFoundBundles as $notFoundBundle => $path) {
                 $alternatives[$path] = $this->findAlternatives($notFoundBundle, array_keys($this->bundlesMetadata));
             }
@@ -402,7 +402,7 @@ EOF
 
     private function buildWarningMessages(array $wrongBundles): array
     {
-        $messages = array();
+        $messages = [];
         foreach ($wrongBundles as $path => $alternatives) {
             $message = sprintf('Path "%s" not matching any bundle found', $path);
             if ($alternatives) {
@@ -421,7 +421,7 @@ EOF
         return $messages;
     }
 
-    private function error(SymfonyStyle $io, string $message, array $alternatives = array()): void
+    private function error(SymfonyStyle $io, string $message, array $alternatives = []): void
     {
         if ($alternatives) {
             if (1 === \count($alternatives)) {
@@ -439,7 +439,7 @@ EOF
     {
         /** @var FilesystemLoader $loader */
         $loader = $this->twig->getLoader();
-        $files = array();
+        $files = [];
         list($namespace, $shortname) = $this->parseTemplateName($name);
 
         foreach ($loader->getPaths($namespace) as $path) {
@@ -470,29 +470,29 @@ EOF
             $namespace = substr($name, 1, $pos - 1);
             $shortname = substr($name, $pos + 1);
 
-            return array($namespace, $shortname);
+            return [$namespace, $shortname];
         }
 
-        return array($default, $name);
+        return [$default, $name];
     }
 
     private function buildTableRows(array $loaderPaths): array
     {
-        $rows = array();
+        $rows = [];
         $firstNamespace = true;
         $prevHasSeparator = false;
 
         foreach ($loaderPaths as $namespace => $paths) {
             if (!$firstNamespace && !$prevHasSeparator && \count($paths) > 1) {
-                $rows[] = array('', '');
+                $rows[] = ['', ''];
             }
             $firstNamespace = false;
             foreach ($paths as $path) {
-                $rows[] = array($namespace, $path.\DIRECTORY_SEPARATOR);
+                $rows[] = [$namespace, $path.\DIRECTORY_SEPARATOR];
                 $namespace = '';
             }
             if (\count($paths) > 1) {
-                $rows[] = array('', '');
+                $rows[] = ['', ''];
                 $prevHasSeparator = true;
             } else {
                 $prevHasSeparator = false;
@@ -507,7 +507,7 @@ EOF
 
     private function findAlternatives(string $name, array $collection): array
     {
-        $alternatives = array();
+        $alternatives = [];
         foreach ($collection as $item) {
             $lev = levenshtein($name, $item);
             if ($lev <= \strlen($name) / 3 || false !== strpos($item, $name)) {
diff --git a/src/Symfony/Bridge/Twig/Command/LintCommand.php b/src/Symfony/Bridge/Twig/Command/LintCommand.php
index 68eebf123c..d2f7542af7 100644
--- a/src/Symfony/Bridge/Twig/Command/LintCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/LintCommand.php
@@ -87,7 +87,7 @@ EOF
                 $template .= fread(STDIN, 1024);
             }
 
-            return $this->display($input, $output, $io, array($this->validate($template, uniqid('sf_', true))));
+            return $this->display($input, $output, $io, [$this->validate($template, uniqid('sf_', true))]);
         }
 
         $filesInfo = $this->getFilesInfo($filenames);
@@ -97,7 +97,7 @@ EOF
 
     private function getFilesInfo(array $filenames)
     {
-        $filesInfo = array();
+        $filesInfo = [];
         foreach ($filenames as $filename) {
             foreach ($this->findFiles($filename) as $file) {
                 $filesInfo[] = $this->validate(file_get_contents($file), $file);
@@ -110,7 +110,7 @@ EOF
     protected function findFiles($filename)
     {
         if (is_file($filename)) {
-            return array($filename);
+            return [$filename];
         } elseif (is_dir($filename)) {
             return Finder::create()->files()->in($filename)->name('*.twig');
         }
@@ -122,7 +122,7 @@ EOF
     {
         $realLoader = $this->twig->getLoader();
         try {
-            $temporaryLoader = new ArrayLoader(array((string) $file => $template));
+            $temporaryLoader = new ArrayLoader([(string) $file => $template]);
             $this->twig->setLoader($temporaryLoader);
             $nodeTree = $this->twig->parse($this->twig->tokenize(new Source($template, (string) $file)));
             $this->twig->compile($nodeTree);
@@ -130,10 +130,10 @@ EOF
         } catch (Error $e) {
             $this->twig->setLoader($realLoader);
 
-            return array('template' => $template, 'file' => $file, 'line' => $e->getTemplateLine(), 'valid' => false, 'exception' => $e);
+            return ['template' => $template, 'file' => $file, 'line' => $e->getTemplateLine(), 'valid' => false, 'exception' => $e];
         }
 
-        return array('template' => $template, 'file' => $file, 'valid' => true);
+        return ['template' => $template, 'file' => $file, 'valid' => true];
     }
 
     private function display(InputInterface $input, OutputInterface $output, SymfonyStyle $io, $files)
@@ -219,7 +219,7 @@ EOF
         $position = max(0, $line - $context);
         $max = min(\count($lines), $line - 1 + $context);
 
-        $result = array();
+        $result = [];
         while ($position < $max) {
             $result[$position + 1] = $lines[$position];
             ++$position;
diff --git a/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php b/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
index 9e214fc731..c9611e3761 100644
--- a/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
+++ b/src/Symfony/Bridge/Twig/DataCollector/TwigDataCollector.php
@@ -51,7 +51,7 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
     {
         $this->profile->reset();
         $this->computed = null;
-        $this->data = array();
+        $this->data = [];
     }
 
     /**
@@ -60,7 +60,7 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
     public function lateCollect()
     {
         $this->data['profile'] = serialize($this->profile);
-        $this->data['template_paths'] = array();
+        $this->data['template_paths'] = [];
 
         if (null === $this->twig) {
             return;
@@ -122,15 +122,15 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
         $dump = $dumper->dump($this->getProfile());
 
         // needed to remove the hardcoded CSS styles
-        $dump = str_replace(array(
+        $dump = str_replace([
             '<span style="background-color: #ffd">',
             '<span style="color: #d44">',
             '<span style="background-color: #dfd">',
-        ), array(
+        ], [
             '<span class="status-warning">',
             '<span class="status-error">',
             '<span class="status-success">',
-        ), $dump);
+        ], $dump);
 
         return new Markup($dump, 'UTF-8');
     }
@@ -138,7 +138,7 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
     public function getProfile()
     {
         if (null === $this->profile) {
-            $this->profile = unserialize($this->data['profile'], array('allowed_classes' => array('Twig_Profiler_Profile', 'Twig\Profiler\Profile')));
+            $this->profile = unserialize($this->data['profile'], ['allowed_classes' => ['Twig_Profiler_Profile', 'Twig\Profiler\Profile']]);
         }
 
         return $this->profile;
@@ -155,13 +155,13 @@ class TwigDataCollector extends DataCollector implements LateDataCollectorInterf
 
     private function computeData(Profile $profile)
     {
-        $data = array(
+        $data = [
             'template_count' => 0,
             'block_count' => 0,
             'macro_count' => 0,
-        );
+        ];
 
-        $templates = array();
+        $templates = [];
         foreach ($profile as $p) {
             $d = $this->computeData($p);
 
diff --git a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
index d5d70fb397..cc2cdb268e 100644
--- a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
@@ -34,10 +34,10 @@ class AssetExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('asset', array($this, 'getAssetUrl')),
-            new TwigFunction('asset_version', array($this, 'getAssetVersion')),
-        );
+        return [
+            new TwigFunction('asset', [$this, 'getAssetUrl']),
+            new TwigFunction('asset_version', [$this, 'getAssetVersion']),
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/CodeExtension.php b/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
index 73d9031b90..56211fe6ec 100644
--- a/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/CodeExtension.php
@@ -43,18 +43,18 @@ class CodeExtension extends AbstractExtension
      */
     public function getFilters()
     {
-        return array(
-            new TwigFilter('abbr_class', array($this, 'abbrClass'), array('is_safe' => array('html'))),
-            new TwigFilter('abbr_method', array($this, 'abbrMethod'), array('is_safe' => array('html'))),
-            new TwigFilter('format_args', array($this, 'formatArgs'), array('is_safe' => array('html'))),
-            new TwigFilter('format_args_as_text', array($this, 'formatArgsAsText')),
-            new TwigFilter('file_excerpt', array($this, 'fileExcerpt'), array('is_safe' => array('html'))),
-            new TwigFilter('format_file', array($this, 'formatFile'), array('is_safe' => array('html'))),
-            new TwigFilter('format_file_from_text', array($this, 'formatFileFromText'), array('is_safe' => array('html'))),
-            new TwigFilter('format_log_message', array($this, 'formatLogMessage'), array('is_safe' => array('html'))),
-            new TwigFilter('file_link', array($this, 'getFileLink')),
-            new TwigFilter('file_relative', array($this, 'getFileRelative')),
-        );
+        return [
+            new TwigFilter('abbr_class', [$this, 'abbrClass'], ['is_safe' => ['html']]),
+            new TwigFilter('abbr_method', [$this, 'abbrMethod'], ['is_safe' => ['html']]),
+            new TwigFilter('format_args', [$this, 'formatArgs'], ['is_safe' => ['html']]),
+            new TwigFilter('format_args_as_text', [$this, 'formatArgsAsText']),
+            new TwigFilter('file_excerpt', [$this, 'fileExcerpt'], ['is_safe' => ['html']]),
+            new TwigFilter('format_file', [$this, 'formatFile'], ['is_safe' => ['html']]),
+            new TwigFilter('format_file_from_text', [$this, 'formatFileFromText'], ['is_safe' => ['html']]),
+            new TwigFilter('format_log_message', [$this, 'formatLogMessage'], ['is_safe' => ['html']]),
+            new TwigFilter('file_link', [$this, 'getFileLink']),
+            new TwigFilter('file_relative', [$this, 'getFileRelative']),
+        ];
     }
 
     public function abbrClass($class)
@@ -88,7 +88,7 @@ class CodeExtension extends AbstractExtension
      */
     public function formatArgs($args)
     {
-        $result = array();
+        $result = [];
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
                 $parts = explode('\\', $item[1]);
@@ -147,7 +147,7 @@ class CodeExtension extends AbstractExtension
             }, $code);
             $content = explode('<br />', $code);
 
-            $lines = array();
+            $lines = [];
             if (0 > $srcContext) {
                 $srcContext = \count($content);
             }
@@ -205,7 +205,7 @@ class CodeExtension extends AbstractExtension
     public function getFileLink($file, $line)
     {
         if ($fmt = $this->fileLinkFormat) {
-            return \is_string($fmt) ? strtr($fmt, array('%f' => $file, '%l' => $line)) : $fmt->format($file, $line);
+            return \is_string($fmt) ? strtr($fmt, ['%f' => $file, '%l' => $line]) : $fmt->format($file, $line);
         }
 
         return false;
@@ -235,7 +235,7 @@ class CodeExtension extends AbstractExtension
     public function formatLogMessage($message, array $context)
     {
         if ($context && false !== strpos($message, '{')) {
-            $replacements = array();
+            $replacements = [];
             foreach ($context as $key => $val) {
                 if (is_scalar($val)) {
                     $replacements['{'.$key.'}'] = $val;
diff --git a/src/Symfony/Bridge/Twig/Extension/CsrfExtension.php b/src/Symfony/Bridge/Twig/Extension/CsrfExtension.php
index 2f061acfd3..934fe91d7c 100644
--- a/src/Symfony/Bridge/Twig/Extension/CsrfExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/CsrfExtension.php
@@ -25,8 +25,8 @@ class CsrfExtension extends AbstractExtension
      */
     public function getFunctions(): array
     {
-        return array(
-            new TwigFunction('csrf_token', array(CsrfRuntime::class, 'getCsrfToken')),
-        );
+        return [
+            new TwigFunction('csrf_token', [CsrfRuntime::class, 'getCsrfToken']),
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
index 3d4c6841f2..88b75368da 100644
--- a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
@@ -37,14 +37,14 @@ class DumpExtension extends AbstractExtension
 
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('dump', array($this, 'dump'), array('is_safe' => array('html'), 'needs_context' => true, 'needs_environment' => true)),
-        );
+        return [
+            new TwigFunction('dump', [$this, 'dump'], ['is_safe' => ['html'], 'needs_context' => true, 'needs_environment' => true]),
+        ];
     }
 
     public function getTokenParsers()
     {
-        return array(new DumpTokenParser());
+        return [new DumpTokenParser()];
     }
 
     public function getName()
@@ -59,14 +59,14 @@ class DumpExtension extends AbstractExtension
         }
 
         if (2 === \func_num_args()) {
-            $vars = array();
+            $vars = [];
             foreach ($context as $key => $value) {
                 if (!$value instanceof Template) {
                     $vars[$key] = $value;
                 }
             }
 
-            $vars = array($vars);
+            $vars = [$vars];
         } else {
             $vars = \func_get_args();
             unset($vars[0], $vars[1]);
diff --git a/src/Symfony/Bridge/Twig/Extension/ExpressionExtension.php b/src/Symfony/Bridge/Twig/Extension/ExpressionExtension.php
index fc64fa3e37..21f6be4d6e 100644
--- a/src/Symfony/Bridge/Twig/Extension/ExpressionExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/ExpressionExtension.php
@@ -27,9 +27,9 @@ class ExpressionExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('expression', array($this, 'createExpression')),
-        );
+        return [
+            new TwigFunction('expression', [$this, 'createExpression']),
+        ];
     }
 
     public function createExpression($expression)
diff --git a/src/Symfony/Bridge/Twig/Extension/FormExtension.php b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
index 54f3b70bf1..f7429ad3bb 100644
--- a/src/Symfony/Bridge/Twig/Extension/FormExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/FormExtension.php
@@ -32,10 +32,10 @@ class FormExtension extends AbstractExtension
      */
     public function getTokenParsers()
     {
-        return array(
+        return [
             // {% form_theme form "SomeBundle::widgets.twig" %}
             new FormThemeTokenParser(),
-        );
+        ];
     }
 
     /**
@@ -43,18 +43,18 @@ class FormExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('form_widget', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_errors', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_label', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_help', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_row', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_rest', null, array('node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form', null, array('node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_start', null, array('node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('form_end', null, array('node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => array('html'))),
-            new TwigFunction('csrf_token', array('Symfony\Component\Form\FormRenderer', 'renderCsrfToken')),
-        );
+        return [
+            new TwigFunction('form_widget', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_errors', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_label', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_help', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_row', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_rest', null, ['node_class' => 'Symfony\Bridge\Twig\Node\SearchAndRenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form', null, ['node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_start', null, ['node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('form_end', null, ['node_class' => 'Symfony\Bridge\Twig\Node\RenderBlockNode', 'is_safe' => ['html']]),
+            new TwigFunction('csrf_token', ['Symfony\Component\Form\FormRenderer', 'renderCsrfToken']),
+        ];
     }
 
     /**
@@ -62,10 +62,10 @@ class FormExtension extends AbstractExtension
      */
     public function getFilters()
     {
-        return array(
-            new TwigFilter('humanize', array('Symfony\Component\Form\FormRenderer', 'humanize')),
-            new TwigFilter('form_encode_currency', array('Symfony\Component\Form\FormRenderer', 'encodeCurrency'), array('is_safe' => array('html'), 'needs_environment' => true)),
-        );
+        return [
+            new TwigFilter('humanize', ['Symfony\Component\Form\FormRenderer', 'humanize']),
+            new TwigFilter('form_encode_currency', ['Symfony\Component\Form\FormRenderer', 'encodeCurrency'], ['is_safe' => ['html'], 'needs_environment' => true]),
+        ];
     }
 
     /**
@@ -73,10 +73,10 @@ class FormExtension extends AbstractExtension
      */
     public function getTests()
     {
-        return array(
+        return [
             new TwigTest('selectedchoice', 'Symfony\Bridge\Twig\Extension\twig_is_selected_choice'),
             new TwigTest('rootform', 'Symfony\Bridge\Twig\Extension\twig_is_root_form'),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php b/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
index fe2778393c..82b9a92f75 100644
--- a/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/HttpFoundationExtension.php
@@ -38,10 +38,10 @@ class HttpFoundationExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('absolute_url', array($this, 'generateAbsoluteUrl')),
-            new TwigFunction('relative_path', array($this, 'generateRelativePath')),
-        );
+        return [
+            new TwigFunction('absolute_url', [$this, 'generateAbsoluteUrl']),
+            new TwigFunction('relative_path', [$this, 'generateRelativePath']),
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/HttpKernelExtension.php b/src/Symfony/Bridge/Twig/Extension/HttpKernelExtension.php
index 45142e7402..f8b93ada15 100644
--- a/src/Symfony/Bridge/Twig/Extension/HttpKernelExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/HttpKernelExtension.php
@@ -24,14 +24,14 @@ class HttpKernelExtension extends AbstractExtension
 {
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('render', array(HttpKernelRuntime::class, 'renderFragment'), array('is_safe' => array('html'))),
-            new TwigFunction('render_*', array(HttpKernelRuntime::class, 'renderFragmentStrategy'), array('is_safe' => array('html'))),
+        return [
+            new TwigFunction('render', [HttpKernelRuntime::class, 'renderFragment'], ['is_safe' => ['html']]),
+            new TwigFunction('render_*', [HttpKernelRuntime::class, 'renderFragmentStrategy'], ['is_safe' => ['html']]),
             new TwigFunction('controller', static::class.'::controller'),
-        );
+        ];
     }
 
-    public static function controller($controller, $attributes = array(), $query = array())
+    public static function controller($controller, $attributes = [], $query = [])
     {
         return new ControllerReference($controller, $attributes, $query);
     }
diff --git a/src/Symfony/Bridge/Twig/Extension/HttpKernelRuntime.php b/src/Symfony/Bridge/Twig/Extension/HttpKernelRuntime.php
index 6eea673e25..fcd7c24416 100644
--- a/src/Symfony/Bridge/Twig/Extension/HttpKernelRuntime.php
+++ b/src/Symfony/Bridge/Twig/Extension/HttpKernelRuntime.php
@@ -38,7 +38,7 @@ class HttpKernelRuntime
      *
      * @see FragmentHandler::render()
      */
-    public function renderFragment($uri, $options = array())
+    public function renderFragment($uri, $options = [])
     {
         $strategy = isset($options['strategy']) ? $options['strategy'] : 'inline';
         unset($options['strategy']);
@@ -57,7 +57,7 @@ class HttpKernelRuntime
      *
      * @see FragmentHandler::render()
      */
-    public function renderFragmentStrategy($strategy, $uri, $options = array())
+    public function renderFragmentStrategy($strategy, $uri, $options = [])
     {
         return $this->handler->render($uri, $strategy, $options);
     }
diff --git a/src/Symfony/Bridge/Twig/Extension/LogoutUrlExtension.php b/src/Symfony/Bridge/Twig/Extension/LogoutUrlExtension.php
index 17abb77989..e8bc6190cd 100644
--- a/src/Symfony/Bridge/Twig/Extension/LogoutUrlExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/LogoutUrlExtension.php
@@ -34,10 +34,10 @@ class LogoutUrlExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('logout_url', array($this, 'getLogoutUrl')),
-            new TwigFunction('logout_path', array($this, 'getLogoutPath')),
-        );
+        return [
+            new TwigFunction('logout_url', [$this, 'getLogoutUrl']),
+            new TwigFunction('logout_path', [$this, 'getLogoutPath']),
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php b/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
index a23a62bb28..67fbe8d391 100644
--- a/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/RoutingExtension.php
@@ -39,10 +39,10 @@ class RoutingExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('url', array($this, 'getUrl'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
-            new TwigFunction('path', array($this, 'getPath'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
-        );
+        return [
+            new TwigFunction('url', [$this, 'getUrl'], ['is_safe_callback' => [$this, 'isUrlGenerationSafe']]),
+            new TwigFunction('path', [$this, 'getPath'], ['is_safe_callback' => [$this, 'isUrlGenerationSafe']]),
+        ];
     }
 
     /**
@@ -52,7 +52,7 @@ class RoutingExtension extends AbstractExtension
      *
      * @return string
      */
-    public function getPath($name, $parameters = array(), $relative = false)
+    public function getPath($name, $parameters = [], $relative = false)
     {
         return $this->generator->generate($name, $parameters, $relative ? UrlGeneratorInterface::RELATIVE_PATH : UrlGeneratorInterface::ABSOLUTE_PATH);
     }
@@ -64,7 +64,7 @@ class RoutingExtension extends AbstractExtension
      *
      * @return string
      */
-    public function getUrl($name, $parameters = array(), $schemeRelative = false)
+    public function getUrl($name, $parameters = [], $schemeRelative = false)
     {
         return $this->generator->generate($name, $parameters, $schemeRelative ? UrlGeneratorInterface::NETWORK_PATH : UrlGeneratorInterface::ABSOLUTE_URL);
     }
@@ -103,10 +103,10 @@ class RoutingExtension extends AbstractExtension
         if (null === $paramsNode || $paramsNode instanceof ArrayExpression && \count($paramsNode) <= 2 &&
             (!$paramsNode->hasNode(1) || $paramsNode->getNode(1) instanceof ConstantExpression)
         ) {
-            return array('html');
+            return ['html'];
         }
 
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/SecurityExtension.php b/src/Symfony/Bridge/Twig/Extension/SecurityExtension.php
index 193726a684..439c31aad3 100644
--- a/src/Symfony/Bridge/Twig/Extension/SecurityExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/SecurityExtension.php
@@ -53,9 +53,9 @@ class SecurityExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('is_granted', array($this, 'isGranted')),
-        );
+        return [
+            new TwigFunction('is_granted', [$this, 'isGranted']),
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/StopwatchExtension.php b/src/Symfony/Bridge/Twig/Extension/StopwatchExtension.php
index 20b0471d53..19dfed23e3 100644
--- a/src/Symfony/Bridge/Twig/Extension/StopwatchExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/StopwatchExtension.php
@@ -38,14 +38,14 @@ class StopwatchExtension extends AbstractExtension
 
     public function getTokenParsers()
     {
-        return array(
+        return [
             /*
              * {% stopwatch foo %}
              * Some stuff which will be recorded on the timeline
              * {% endstopwatch %}
              */
             new StopwatchTokenParser(null !== $this->stopwatch && $this->enabled),
-        );
+        ];
     }
 
     public function getName()
diff --git a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
index ec5d452cef..b8a0eb6154 100644
--- a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
@@ -69,10 +69,10 @@ class TranslationExtension extends AbstractExtension
      */
     public function getFilters()
     {
-        return array(
-            new TwigFilter('trans', array($this, 'trans')),
-            new TwigFilter('transchoice', array($this, 'transchoice'), array('deprecated' => '4.2', 'alternative' => 'trans" with parameter "%count%')),
-        );
+        return [
+            new TwigFilter('trans', [$this, 'trans']),
+            new TwigFilter('transchoice', [$this, 'transchoice'], ['deprecated' => '4.2', 'alternative' => 'trans" with parameter "%count%']),
+        ];
     }
 
     /**
@@ -82,7 +82,7 @@ class TranslationExtension extends AbstractExtension
      */
     public function getTokenParsers()
     {
-        return array(
+        return [
             // {% trans %}Symfony is great!{% endtrans %}
             new TransTokenParser(),
 
@@ -93,7 +93,7 @@ class TranslationExtension extends AbstractExtension
 
             // {% trans_default_domain "foobar" %}
             new TransDefaultDomainTokenParser(),
-        );
+        ];
     }
 
     /**
@@ -101,7 +101,7 @@ class TranslationExtension extends AbstractExtension
      */
     public function getNodeVisitors()
     {
-        return array($this->getTranslationNodeVisitor(), new TranslationDefaultDomainNodeVisitor());
+        return [$this->getTranslationNodeVisitor(), new TranslationDefaultDomainNodeVisitor()];
     }
 
     public function getTranslationNodeVisitor()
@@ -109,7 +109,7 @@ class TranslationExtension extends AbstractExtension
         return $this->translationNodeVisitor ?: $this->translationNodeVisitor = new TranslationNodeVisitor();
     }
 
-    public function trans($message, array $arguments = array(), $domain = null, $locale = null, $count = null)
+    public function trans($message, array $arguments = [], $domain = null, $locale = null, $count = null)
     {
         if (null !== $count) {
             $arguments['%count%'] = $count;
@@ -124,16 +124,16 @@ class TranslationExtension extends AbstractExtension
     /**
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transchoice($message, $count, array $arguments = array(), $domain = null, $locale = null)
+    public function transchoice($message, $count, array $arguments = [], $domain = null, $locale = null)
     {
         if (null === $this->translator) {
-            return $this->doTrans($message, array_merge(array('%count%' => $count), $arguments), $domain, $locale);
+            return $this->doTrans($message, array_merge(['%count%' => $count], $arguments), $domain, $locale);
         }
         if ($this->translator instanceof TranslatorInterface) {
-            return $this->translator->trans($message, array_merge(array('%count%' => $count), $arguments), $domain, $locale);
+            return $this->translator->trans($message, array_merge(['%count%' => $count], $arguments), $domain, $locale);
         }
 
-        return $this->translator->transChoice($message, $count, array_merge(array('%count%' => $count), $arguments), $domain, $locale);
+        return $this->translator->transChoice($message, $count, array_merge(['%count%' => $count], $arguments), $domain, $locale);
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/WebLinkExtension.php b/src/Symfony/Bridge/Twig/Extension/WebLinkExtension.php
index 3d90c3bf21..0ca519ee72 100644
--- a/src/Symfony/Bridge/Twig/Extension/WebLinkExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/WebLinkExtension.php
@@ -36,14 +36,14 @@ class WebLinkExtension extends AbstractExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('link', array($this, 'link')),
-            new TwigFunction('preload', array($this, 'preload')),
-            new TwigFunction('dns_prefetch', array($this, 'dnsPrefetch')),
-            new TwigFunction('preconnect', array($this, 'preconnect')),
-            new TwigFunction('prefetch', array($this, 'prefetch')),
-            new TwigFunction('prerender', array($this, 'prerender')),
-        );
+        return [
+            new TwigFunction('link', [$this, 'link']),
+            new TwigFunction('preload', [$this, 'preload']),
+            new TwigFunction('dns_prefetch', [$this, 'dnsPrefetch']),
+            new TwigFunction('preconnect', [$this, 'preconnect']),
+            new TwigFunction('prefetch', [$this, 'prefetch']),
+            new TwigFunction('prerender', [$this, 'prerender']),
+        ];
     }
 
     /**
@@ -51,11 +51,11 @@ class WebLinkExtension extends AbstractExtension
      *
      * @param string $uri        The relation URI
      * @param string $rel        The relation type (e.g. "preload", "prefetch", "prerender" or "dns-prefetch")
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('pr' => 0.5)")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['pr' => 0.5]")
      *
      * @return string The relation URI
      */
-    public function link($uri, $rel, array $attributes = array())
+    public function link($uri, $rel, array $attributes = [])
     {
         if (!$request = $this->requestStack->getMasterRequest()) {
             return $uri;
@@ -76,11 +76,11 @@ class WebLinkExtension extends AbstractExtension
      * Preloads a resource.
      *
      * @param string $uri        A public path
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('crossorigin' => 'use-credentials')")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['crossorigin' => 'use-credentials']")
      *
      * @return string The path of the asset
      */
-    public function preload($uri, array $attributes = array())
+    public function preload($uri, array $attributes = [])
     {
         return $this->link($uri, 'preload', $attributes);
     }
@@ -89,11 +89,11 @@ class WebLinkExtension extends AbstractExtension
      * Resolves a resource origin as early as possible.
      *
      * @param string $uri        A public path
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('pr' => 0.5)")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['pr' => 0.5]")
      *
      * @return string The path of the asset
      */
-    public function dnsPrefetch($uri, array $attributes = array())
+    public function dnsPrefetch($uri, array $attributes = [])
     {
         return $this->link($uri, 'dns-prefetch', $attributes);
     }
@@ -102,11 +102,11 @@ class WebLinkExtension extends AbstractExtension
      * Initiates a early connection to a resource (DNS resolution, TCP handshake, TLS negotiation).
      *
      * @param string $uri        A public path
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('pr' => 0.5)")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['pr' => 0.5]")
      *
      * @return string The path of the asset
      */
-    public function preconnect($uri, array $attributes = array())
+    public function preconnect($uri, array $attributes = [])
     {
         return $this->link($uri, 'preconnect', $attributes);
     }
@@ -115,11 +115,11 @@ class WebLinkExtension extends AbstractExtension
      * Indicates to the client that it should prefetch this resource.
      *
      * @param string $uri        A public path
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('pr' => 0.5)")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['pr' => 0.5]")
      *
      * @return string The path of the asset
      */
-    public function prefetch($uri, array $attributes = array())
+    public function prefetch($uri, array $attributes = [])
     {
         return $this->link($uri, 'prefetch', $attributes);
     }
@@ -128,11 +128,11 @@ class WebLinkExtension extends AbstractExtension
      * Indicates to the client that it should prerender this resource .
      *
      * @param string $uri        A public path
-     * @param array  $attributes The attributes of this link (e.g. "array('as' => true)", "array('pr' => 0.5)")
+     * @param array  $attributes The attributes of this link (e.g. "['as' => true]", "['pr' => 0.5]")
      *
      * @return string The path of the asset
      */
-    public function prerender($uri, array $attributes = array())
+    public function prerender($uri, array $attributes = [])
     {
         return $this->link($uri, 'prerender', $attributes);
     }
diff --git a/src/Symfony/Bridge/Twig/Extension/WorkflowExtension.php b/src/Symfony/Bridge/Twig/Extension/WorkflowExtension.php
index cd63e84ea4..05c236a164 100644
--- a/src/Symfony/Bridge/Twig/Extension/WorkflowExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/WorkflowExtension.php
@@ -32,13 +32,13 @@ class WorkflowExtension extends AbstractExtension
 
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('workflow_can', array($this, 'canTransition')),
-            new TwigFunction('workflow_transitions', array($this, 'getEnabledTransitions')),
-            new TwigFunction('workflow_has_marked_place', array($this, 'hasMarkedPlace')),
-            new TwigFunction('workflow_marked_places', array($this, 'getMarkedPlaces')),
-            new TwigFunction('workflow_metadata', array($this, 'getMetadata')),
-        );
+        return [
+            new TwigFunction('workflow_can', [$this, 'canTransition']),
+            new TwigFunction('workflow_transitions', [$this, 'getEnabledTransitions']),
+            new TwigFunction('workflow_has_marked_place', [$this, 'hasMarkedPlace']),
+            new TwigFunction('workflow_marked_places', [$this, 'getMarkedPlaces']),
+            new TwigFunction('workflow_metadata', [$this, 'getMetadata']),
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
index 88b29d7c23..3284ec5cd3 100644
--- a/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/YamlExtension.php
@@ -28,10 +28,10 @@ class YamlExtension extends AbstractExtension
      */
     public function getFilters()
     {
-        return array(
-            new TwigFilter('yaml_encode', array($this, 'encode')),
-            new TwigFilter('yaml_dump', array($this, 'dump')),
-        );
+        return [
+            new TwigFilter('yaml_encode', [$this, 'encode']),
+            new TwigFilter('yaml_dump', [$this, 'dump']),
+        ];
     }
 
     public function encode($input, $inline = 0, $dumpObjects = 0)
diff --git a/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php b/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
index bf97e52ad3..8dc8998a74 100644
--- a/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
+++ b/src/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
@@ -40,7 +40,7 @@ class TwigRendererEngine extends AbstractRendererEngine
     /**
      * {@inheritdoc}
      */
-    public function renderBlock(FormView $view, $resource, $blockName, array $variables = array())
+    public function renderBlock(FormView $view, $resource, $blockName, array $variables = [])
     {
         $cacheKey = $view->vars[self::CACHE_KEY_VAR];
 
@@ -169,7 +169,7 @@ class TwigRendererEngine extends AbstractRendererEngine
         // theme is a reference and we don't want to change it.
         $currentTheme = $theme;
 
-        $context = $this->environment->mergeGlobals(array());
+        $context = $this->environment->mergeGlobals([]);
 
         // The do loop takes care of template inheritance.
         // Add blocks from all templates in the inheritance tree, but avoid
diff --git a/src/Symfony/Bridge/Twig/Node/DumpNode.php b/src/Symfony/Bridge/Twig/Node/DumpNode.php
index 19c1397037..c9cf1e1689 100644
--- a/src/Symfony/Bridge/Twig/Node/DumpNode.php
+++ b/src/Symfony/Bridge/Twig/Node/DumpNode.php
@@ -23,12 +23,12 @@ class DumpNode extends Node
 
     public function __construct($varPrefix, Node $values = null, int $lineno, string $tag = null)
     {
-        $nodes = array();
+        $nodes = [];
         if (null !== $values) {
             $nodes['values'] = $values;
         }
 
-        parent::__construct($nodes, array(), $lineno, $tag);
+        parent::__construct($nodes, [], $lineno, $tag);
         $this->varPrefix = $varPrefix;
     }
 
diff --git a/src/Symfony/Bridge/Twig/Node/FormThemeNode.php b/src/Symfony/Bridge/Twig/Node/FormThemeNode.php
index b898ec58bf..c99675cab3 100644
--- a/src/Symfony/Bridge/Twig/Node/FormThemeNode.php
+++ b/src/Symfony/Bridge/Twig/Node/FormThemeNode.php
@@ -22,7 +22,7 @@ class FormThemeNode extends Node
 {
     public function __construct(Node $form, Node $resources, int $lineno, string $tag = null, bool $only = false)
     {
-        parent::__construct(array('form' => $form, 'resources' => $resources), array('only' => $only), $lineno, $tag);
+        parent::__construct(['form' => $form, 'resources' => $resources], ['only' => $only], $lineno, $tag);
     }
 
     public function compile(Compiler $compiler)
diff --git a/src/Symfony/Bridge/Twig/Node/SearchAndRenderBlockNode.php b/src/Symfony/Bridge/Twig/Node/SearchAndRenderBlockNode.php
index 09262b8ca8..612bec14e5 100644
--- a/src/Symfony/Bridge/Twig/Node/SearchAndRenderBlockNode.php
+++ b/src/Symfony/Bridge/Twig/Node/SearchAndRenderBlockNode.php
@@ -53,7 +53,7 @@ class SearchAndRenderBlockNode extends FunctionExpression
                         // Only insert the label into the array if it is not empty
                         if (!twig_test_empty($label->getAttribute('value'))) {
                             $originalVariables = $variables;
-                            $variables = new ArrayExpression(array(), $lineno);
+                            $variables = new ArrayExpression([], $lineno);
                             $labelKey = new ConstantExpression('label', $lineno);
 
                             if (null !== $originalVariables) {
diff --git a/src/Symfony/Bridge/Twig/Node/StopwatchNode.php b/src/Symfony/Bridge/Twig/Node/StopwatchNode.php
index d95c63028c..3844b2124c 100644
--- a/src/Symfony/Bridge/Twig/Node/StopwatchNode.php
+++ b/src/Symfony/Bridge/Twig/Node/StopwatchNode.php
@@ -24,7 +24,7 @@ class StopwatchNode extends Node
 {
     public function __construct(Node $name, Node $body, AssignNameExpression $var, int $lineno = 0, string $tag = null)
     {
-        parent::__construct(array('body' => $body, 'name' => $name, 'var' => $var), array(), $lineno, $tag);
+        parent::__construct(['body' => $body, 'name' => $name, 'var' => $var], [], $lineno, $tag);
     }
 
     public function compile(Compiler $compiler)
diff --git a/src/Symfony/Bridge/Twig/Node/TransDefaultDomainNode.php b/src/Symfony/Bridge/Twig/Node/TransDefaultDomainNode.php
index 63ad1f6796..7f8024aa85 100644
--- a/src/Symfony/Bridge/Twig/Node/TransDefaultDomainNode.php
+++ b/src/Symfony/Bridge/Twig/Node/TransDefaultDomainNode.php
@@ -22,7 +22,7 @@ class TransDefaultDomainNode extends Node
 {
     public function __construct(AbstractExpression $expr, int $lineno = 0, string $tag = null)
     {
-        parent::__construct(array('expr' => $expr), array(), $lineno, $tag);
+        parent::__construct(['expr' => $expr], [], $lineno, $tag);
     }
 
     public function compile(Compiler $compiler)
diff --git a/src/Symfony/Bridge/Twig/Node/TransNode.php b/src/Symfony/Bridge/Twig/Node/TransNode.php
index 578e37dd2c..cedc6b740e 100644
--- a/src/Symfony/Bridge/Twig/Node/TransNode.php
+++ b/src/Symfony/Bridge/Twig/Node/TransNode.php
@@ -29,7 +29,7 @@ class TransNode extends Node
 {
     public function __construct(Node $body, Node $domain = null, AbstractExpression $count = null, AbstractExpression $vars = null, AbstractExpression $locale = null, int $lineno = 0, string $tag = null)
     {
-        $nodes = array('body' => $body);
+        $nodes = ['body' => $body];
         if (null !== $domain) {
             $nodes['domain'] = $domain;
         }
@@ -43,14 +43,14 @@ class TransNode extends Node
             $nodes['locale'] = $locale;
         }
 
-        parent::__construct($nodes, array(), $lineno, $tag);
+        parent::__construct($nodes, [], $lineno, $tag);
     }
 
     public function compile(Compiler $compiler)
     {
         $compiler->addDebugInfo($this);
 
-        $defaults = new ArrayExpression(array(), -1);
+        $defaults = new ArrayExpression([], -1);
         if ($this->hasNode('vars') && ($vars = $this->getNode('vars')) instanceof ArrayExpression) {
             $defaults = $this->getNode('vars');
             $vars = null;
@@ -112,7 +112,7 @@ class TransNode extends Node
         } elseif ($body instanceof TextNode) {
             $msg = $body->getAttribute('data');
         } else {
-            return array($body, $vars);
+            return [$body, $vars];
         }
 
         preg_match_all('/(?<!%)%([^%]+)%/', $msg, $matches);
@@ -130,6 +130,6 @@ class TransNode extends Node
             }
         }
 
-        return array(new ConstantExpression(str_replace('%%', '%', trim($msg)), $body->getTemplateLine()), $vars);
+        return [new ConstantExpression(str_replace('%%', '%', trim($msg)), $body->getTemplateLine()), $vars];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/Scope.php b/src/Symfony/Bridge/Twig/NodeVisitor/Scope.php
index 59497dc961..d5bcfa8b8f 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/Scope.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/Scope.php
@@ -17,7 +17,7 @@ namespace Symfony\Bridge\Twig\NodeVisitor;
 class Scope
 {
     private $parent;
-    private $data = array();
+    private $data = [];
     private $left = false;
 
     public function __construct(self $parent = null)
diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
index 6a34a037e4..5beae16dba 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
@@ -56,7 +56,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
                 $name = new AssignNameExpression($var, $node->getTemplateLine());
                 $this->scope->set('domain', new NameExpression($var, $node->getTemplateLine()));
 
-                return new SetNode(false, new Node(array($name)), new Node(array($node->getNode('expr'))), $node->getTemplateLine());
+                return new SetNode(false, new Node([$name]), new Node([$node->getNode('expr')]), $node->getTemplateLine());
             }
         }
 
@@ -64,7 +64,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
             return $node;
         }
 
-        if ($node instanceof FilterExpression && \in_array($node->getNode('filter')->getAttribute('value'), array('trans', 'transchoice'))) {
+        if ($node instanceof FilterExpression && \in_array($node->getNode('filter')->getAttribute('value'), ['trans', 'transchoice'])) {
             $arguments = $node->getNode('arguments');
             $ind = 'trans' === $node->getNode('filter')->getAttribute('value') ? 1 : 2;
             if ($this->isNamedArguments($arguments)) {
@@ -74,7 +74,7 @@ class TranslationDefaultDomainNodeVisitor extends AbstractNodeVisitor
             } else {
                 if (!$arguments->hasNode($ind)) {
                     if (!$arguments->hasNode($ind - 1)) {
-                        $arguments->setNode($ind - 1, new ArrayExpression(array(), $node->getTemplateLine()));
+                        $arguments->setNode($ind - 1, new ArrayExpression([], $node->getTemplateLine()));
                     }
 
                     $arguments->setNode($ind, $this->scope->get('domain'));
diff --git a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationNodeVisitor.php b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationNodeVisitor.php
index fef722be64..3da4141cdd 100644
--- a/src/Symfony/Bridge/Twig/NodeVisitor/TranslationNodeVisitor.php
+++ b/src/Symfony/Bridge/Twig/NodeVisitor/TranslationNodeVisitor.php
@@ -28,18 +28,18 @@ class TranslationNodeVisitor extends AbstractNodeVisitor
     const UNDEFINED_DOMAIN = '_undefined';
 
     private $enabled = false;
-    private $messages = array();
+    private $messages = [];
 
     public function enable()
     {
         $this->enabled = true;
-        $this->messages = array();
+        $this->messages = [];
     }
 
     public function disable()
     {
         $this->enabled = false;
-        $this->messages = array();
+        $this->messages = [];
     }
 
     public function getMessages()
@@ -62,26 +62,26 @@ class TranslationNodeVisitor extends AbstractNodeVisitor
             $node->getNode('node') instanceof ConstantExpression
         ) {
             // extract constant nodes with a trans filter
-            $this->messages[] = array(
+            $this->messages[] = [
                 $node->getNode('node')->getAttribute('value'),
                 $this->getReadDomainFromArguments($node->getNode('arguments'), 1),
-            );
+            ];
         } elseif (
             $node instanceof FilterExpression &&
             'transchoice' === $node->getNode('filter')->getAttribute('value') &&
             $node->getNode('node') instanceof ConstantExpression
         ) {
             // extract constant nodes with a trans filter
-            $this->messages[] = array(
+            $this->messages[] = [
                 $node->getNode('node')->getAttribute('value'),
                 $this->getReadDomainFromArguments($node->getNode('arguments'), 2),
-            );
+            ];
         } elseif ($node instanceof TransNode) {
             // extract trans nodes
-            $this->messages[] = array(
+            $this->messages[] = [
                 $node->getNode('body')->getAttribute('data'),
                 $node->hasNode('domain') ? $this->getReadDomainFromNode($node->getNode('domain')) : null,
-            );
+            ];
         }
 
         return $node;
diff --git a/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php b/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
index a9389dd82a..53b84b2d1b 100644
--- a/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/AppVariableTest.php
@@ -32,10 +32,10 @@ class AppVariableTest extends TestCase
 
     public function debugDataProvider()
     {
-        return array(
-            'debug on' => array(true),
-            'debug off' => array(false),
-        );
+        return [
+            'debug on' => [true],
+            'debug off' => [false],
+        ];
     }
 
     public function testEnvironment()
@@ -165,7 +165,7 @@ class AppVariableTest extends TestCase
     {
         $this->setRequestStack(null);
 
-        $this->assertEquals(array(), $this->appVariable->getFlashes());
+        $this->assertEquals([], $this->appVariable->getFlashes());
     }
 
     /**
@@ -189,15 +189,15 @@ class AppVariableTest extends TestCase
         $this->assertEquals($flashMessages, $this->appVariable->getFlashes(''));
 
         $flashMessages = $this->setFlashMessages();
-        $this->assertEquals($flashMessages, $this->appVariable->getFlashes(array()));
+        $this->assertEquals($flashMessages, $this->appVariable->getFlashes([]));
 
         $flashMessages = $this->setFlashMessages();
-        $this->assertEquals(array(), $this->appVariable->getFlashes('this-does-not-exist'));
+        $this->assertEquals([], $this->appVariable->getFlashes('this-does-not-exist'));
 
         $flashMessages = $this->setFlashMessages();
         $this->assertEquals(
-            array('this-does-not-exist' => array()),
-            $this->appVariable->getFlashes(array('this-does-not-exist'))
+            ['this-does-not-exist' => []],
+            $this->appVariable->getFlashes(['this-does-not-exist'])
         );
 
         $flashMessages = $this->setFlashMessages();
@@ -205,31 +205,31 @@ class AppVariableTest extends TestCase
 
         $flashMessages = $this->setFlashMessages();
         $this->assertEquals(
-            array('notice' => $flashMessages['notice']),
-            $this->appVariable->getFlashes(array('notice'))
+            ['notice' => $flashMessages['notice']],
+            $this->appVariable->getFlashes(['notice'])
         );
 
         $flashMessages = $this->setFlashMessages();
         $this->assertEquals(
-            array('notice' => $flashMessages['notice'], 'this-does-not-exist' => array()),
-            $this->appVariable->getFlashes(array('notice', 'this-does-not-exist'))
+            ['notice' => $flashMessages['notice'], 'this-does-not-exist' => []],
+            $this->appVariable->getFlashes(['notice', 'this-does-not-exist'])
         );
 
         $flashMessages = $this->setFlashMessages();
         $this->assertEquals(
-            array('notice' => $flashMessages['notice'], 'error' => $flashMessages['error']),
-            $this->appVariable->getFlashes(array('notice', 'error'))
+            ['notice' => $flashMessages['notice'], 'error' => $flashMessages['error']],
+            $this->appVariable->getFlashes(['notice', 'error'])
         );
 
         $this->assertEquals(
-            array('warning' => $flashMessages['warning']),
-            $this->appVariable->getFlashes(array('warning')),
+            ['warning' => $flashMessages['warning']],
+            $this->appVariable->getFlashes(['warning']),
             'After getting some flash types (e.g. "notice" and "error"), the rest of flash messages must remain (e.g. "warning").'
         );
 
         $this->assertEquals(
-            array('this-does-not-exist' => array()),
-            $this->appVariable->getFlashes(array('this-does-not-exist'))
+            ['this-does-not-exist' => []],
+            $this->appVariable->getFlashes(['this-does-not-exist'])
         );
     }
 
@@ -254,11 +254,11 @@ class AppVariableTest extends TestCase
 
     private function setFlashMessages($sessionHasStarted = true)
     {
-        $flashMessages = array(
-            'notice' => array('Notice #1 message'),
-            'warning' => array('Warning #1 message'),
-            'error' => array('Error #1 message', 'Error #2 message'),
-        );
+        $flashMessages = [
+            'notice' => ['Notice #1 message'],
+            'warning' => ['Warning #1 message'],
+            'error' => ['Error #1 message', 'Error #2 message'],
+        ];
         $flashBag = new FlashBag();
         $flashBag->initialize($flashMessages);
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Command/DebugCommandTest.php b/src/Symfony/Bridge/Twig/Tests/Command/DebugCommandTest.php
index e648a52d84..59c8ed045c 100644
--- a/src/Symfony/Bridge/Twig/Tests/Command/DebugCommandTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Command/DebugCommandTest.php
@@ -23,7 +23,7 @@ class DebugCommandTest extends TestCase
     public function testDebugCommand()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array(), array('decorated' => false));
+        $ret = $tester->execute([], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Functions', trim($tester->getDisplay()));
@@ -32,11 +32,11 @@ class DebugCommandTest extends TestCase
     public function testFilterAndJsonFormatOptions()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('--filter' => 'abs', '--format' => 'json'), array('decorated' => false));
+        $ret = $tester->execute(['--filter' => 'abs', '--format' => 'json'], ['decorated' => false]);
 
-        $expected = array(
-            'filters' => array('abs' => array()),
-        );
+        $expected = [
+            'filters' => ['abs' => []],
+        ];
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertEquals($expected, json_decode($tester->getDisplay(true), true));
@@ -44,19 +44,19 @@ class DebugCommandTest extends TestCase
 
     public function testWarningsWrongBundleOverriding()
     {
-        $bundleMetadata = array(
+        $bundleMetadata = [
             'TwigBundle' => 'vendor/twig-bundle/',
             'WebProfilerBundle' => 'vendor/web-profiler-bundle/',
-        );
+        ];
         $defaultPath = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR.'templates';
 
-        $tester = $this->createCommandTester(array(), $bundleMetadata, $defaultPath);
-        $ret = $tester->execute(array('--filter' => 'unknown', '--format' => 'json'), array('decorated' => false));
+        $tester = $this->createCommandTester([], $bundleMetadata, $defaultPath);
+        $ret = $tester->execute(['--filter' => 'unknown', '--format' => 'json'], ['decorated' => false]);
 
-        $expected = array('warnings' => array(
+        $expected = ['warnings' => [
             'Path "templates/bundles/UnknownBundle" not matching any bundle found',
             'Path "templates/bundles/WebProfileBundle" not matching any bundle found, did you mean "WebProfilerBundle"?',
-        ));
+        ]];
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertEquals($expected, json_decode($tester->getDisplay(true), true));
@@ -68,21 +68,21 @@ class DebugCommandTest extends TestCase
      */
     public function testDeprecationForWrongBundleOverridingInLegacyPath()
     {
-        $bundleMetadata = array(
+        $bundleMetadata = [
             'TwigBundle' => 'vendor/twig-bundle/',
             'WebProfilerBundle' => 'vendor/web-profiler-bundle/',
-        );
+        ];
         $defaultPath = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR.'templates';
         $rootDir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
 
-        $tester = $this->createCommandTester(array(), $bundleMetadata, $defaultPath, $rootDir);
-        $ret = $tester->execute(array('--filter' => 'unknown', '--format' => 'json'), array('decorated' => false));
+        $tester = $this->createCommandTester([], $bundleMetadata, $defaultPath, $rootDir);
+        $ret = $tester->execute(['--filter' => 'unknown', '--format' => 'json'], ['decorated' => false]);
 
-        $expected = array('warnings' => array(
+        $expected = ['warnings' => [
             'Path "Resources/BarBundle" not matching any bundle found',
             'Path "templates/bundles/UnknownBundle" not matching any bundle found',
             'Path "templates/bundles/WebProfileBundle" not matching any bundle found, did you mean "WebProfilerBundle"?',
-        ));
+        ]];
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertEquals($expected, json_decode($tester->getDisplay(true), true));
@@ -94,7 +94,7 @@ class DebugCommandTest extends TestCase
      */
     public function testMalformedTemplateName()
     {
-        $this->createCommandTester()->execute(array('name' => '@foo'));
+        $this->createCommandTester()->execute(['name' => '@foo']);
     }
 
     /**
@@ -103,7 +103,7 @@ class DebugCommandTest extends TestCase
     public function testDebugTemplateName(array $input, string $output, array $paths)
     {
         $tester = $this->createCommandTester($paths);
-        $ret = $tester->execute($input, array('decorated' => false));
+        $ret = $tester->execute($input, ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertStringMatchesFormat($output, $tester->getDisplay(true));
@@ -111,14 +111,14 @@ class DebugCommandTest extends TestCase
 
     public function getDebugTemplateNameTestData()
     {
-        $defaultPaths = array(
+        $defaultPaths = [
             'templates/' => null,
             'templates/bundles/TwigBundle/' => 'Twig',
             'vendors/twig-bundle/Resources/views/' => 'Twig',
-        );
+        ];
 
-        yield 'no template paths configured for your application' => array(
-            'input' => array('name' => 'base.html.twig'),
+        yield 'no template paths configured for your application' => [
+            'input' => ['name' => 'base.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -140,11 +140,11 @@ Configured Paths
 
 TXT
             ,
-            'paths' => array('vendors/twig-bundle/Resources/views/' => 'Twig'),
-        );
+            'paths' => ['vendors/twig-bundle/Resources/views/' => 'Twig'],
+        ];
 
-        yield 'no matched template' => array(
-            'input' => array('name' => '@App/foo.html.twig'),
+        yield 'no matched template' => [
+            'input' => ['name' => '@App/foo.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -170,10 +170,10 @@ Configured Paths
 TXT
             ,
             'paths' => $defaultPaths,
-        );
+        ];
 
-        yield 'matched file' => array(
-            'input' => array('name' => 'base.html.twig'),
+        yield 'matched file' => [
+            'input' => ['name' => 'base.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -194,10 +194,10 @@ Configured Paths
 TXT
             ,
             'paths' => $defaultPaths,
-        );
+        ];
 
-        yield 'overridden files' => array(
-            'input' => array('name' => '@Twig/error.html.twig'),
+        yield 'overridden files' => [
+            'input' => ['name' => '@Twig/error.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -224,10 +224,10 @@ Configured Paths
 TXT
             ,
             'paths' => $defaultPaths,
-        );
+        ];
 
-        yield 'template namespace alternative' => array(
-            'input' => array('name' => '@Twg/error.html.twig'),
+        yield 'template namespace alternative' => [
+            'input' => ['name' => '@Twg/error.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -247,10 +247,10 @@ Configured Paths
 TXT
             ,
             'paths' => $defaultPaths,
-        );
+        ];
 
-        yield 'template name alternative' => array(
-            'input' => array('name' => '@Twig/eror.html.twig'),
+        yield 'template name alternative' => [
+            'input' => ['name' => '@Twig/eror.html.twig'],
             'output' => <<<TXT
 
 Matched File
@@ -276,13 +276,13 @@ Configured Paths
 TXT
             ,
             'paths' => $defaultPaths,
-        );
+        ];
     }
 
-    private function createCommandTester(array $paths = array(), array $bundleMetadata = array(), string $defaultPath = null, string $rootDir = null): CommandTester
+    private function createCommandTester(array $paths = [], array $bundleMetadata = [], string $defaultPath = null, string $rootDir = null): CommandTester
     {
         $projectDir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
-        $loader = new FilesystemLoader(array(), $projectDir);
+        $loader = new FilesystemLoader([], $projectDir);
         foreach ($paths as $path => $namespace) {
             if (null === $namespace) {
                 $loader->addPath($path);
diff --git a/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php b/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
index 535a12f357..82b71eed87 100644
--- a/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Command/LintCommandTest.php
@@ -28,7 +28,7 @@ class LintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile('{{ foo }}');
 
-        $ret = $tester->execute(array('filename' => array($filename)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $tester->execute(['filename' => [$filename]], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('OK in', trim($tester->getDisplay()));
@@ -39,7 +39,7 @@ class LintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile('{{ foo');
 
-        $ret = $tester->execute(array('filename' => array($filename)), array('decorated' => false));
+        $ret = $tester->execute(['filename' => [$filename]], ['decorated' => false]);
 
         $this->assertEquals(1, $ret, 'Returns 1 in case of error');
         $this->assertRegExp('/ERROR  in \S+ \(line /', trim($tester->getDisplay()));
@@ -54,7 +54,7 @@ class LintCommandTest extends TestCase
         $filename = $this->createFile('');
         unlink($filename);
 
-        $ret = $tester->execute(array('filename' => array($filename)), array('decorated' => false));
+        $ret = $tester->execute(['filename' => [$filename]], ['decorated' => false]);
     }
 
     public function testLintFileCompileTimeException()
@@ -62,7 +62,7 @@ class LintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile("{{ 2|number_format(2, decimal_point='.', ',') }}");
 
-        $ret = $tester->execute(array('filename' => array($filename)), array('decorated' => false));
+        $ret = $tester->execute(['filename' => [$filename]], ['decorated' => false]);
 
         $this->assertEquals(1, $ret, 'Returns 1 in case of error');
         $this->assertRegExp('/ERROR  in \S+ \(line /', trim($tester->getDisplay()));
@@ -97,7 +97,7 @@ class LintCommandTest extends TestCase
 
     protected function setUp()
     {
-        $this->files = array();
+        $this->files = [];
     }
 
     protected function tearDown()
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3HorizontalLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3HorizontalLayoutTest.php
index 97311b38a9..9131216182 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3HorizontalLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3HorizontalLayoutTest.php
@@ -17,7 +17,7 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType');
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -31,11 +31,11 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
     public function testLabelDoesNotRenderFieldAttributes()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -48,11 +48,11 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
     public function testLabelWithCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -65,11 +65,11 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
     public function testLabelWithCustomTextAndCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), 'Custom label', array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), 'Custom label', [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -82,14 +82,14 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
 
     public function testLabelWithCustomTextAsOptionAndCustomAttributesPassedDirectly()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        ]);
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -102,10 +102,10 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
 
     public function testStartTag()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -114,25 +114,25 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
 
     public function testStartTagWithOverriddenVars()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'put',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
+        $html = $this->renderStart($form->createView(), [
             'method' => 'post',
             'action' => 'http://foo.com/directory',
-        ));
+        ]);
 
         $this->assertSame('<form name="form" method="post" action="http://foo.com/directory" class="form-horizontal">', $html);
     }
 
     public function testStartTagForMultipartForm()
     {
-        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'method' => 'get',
                 'action' => 'http://example.com/directory',
-            ))
+            ])
             ->add('file', 'Symfony\Component\Form\Extension\Core\Type\FileType')
             ->getForm();
 
@@ -143,14 +143,14 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
 
     public function testStartTagWithExtraAttributes()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
-            'attr' => array('class' => 'foobar'),
-        ));
+        $html = $this->renderStart($form->createView(), [
+            'attr' => ['class' => 'foobar'],
+        ]);
 
         $this->assertSame('<form name="form" method="get" action="http://example.com/directory" class="foobar form-horizontal">', $html);
     }
@@ -159,7 +159,7 @@ abstract class AbstractBootstrap3HorizontalLayoutTest extends AbstractBootstrap3
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType');
         $view = $form->createView();
-        $html = $this->renderRow($view, array('label' => 'foo'));
+        $html = $this->renderRow($view, ['label' => 'foo']);
 
         $this->assertMatchesXpath($html, '/div[@class="form-group"]/div[@class="col-sm-2" or @class="col-sm-10"]', 2);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3LayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3LayoutTest.php
index 92ab6df88f..fd1c319a63 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3LayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap3LayoutTest.php
@@ -20,7 +20,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType');
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -34,11 +34,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     public function testLabelDoesNotRenderFieldAttributes()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -51,11 +51,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     public function testLabelWithCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -68,11 +68,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     public function testLabelWithCustomTextAndCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), 'Custom label', array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), 'Custom label', [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -85,14 +85,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testLabelWithCustomTextAsOptionAndCustomAttributesPassedDirectly()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        ]);
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -105,9 +105,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testHelp()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-        ));
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -122,12 +122,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -195,7 +195,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="checkbox"]
     [
@@ -213,7 +213,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="checkbox"]
     [
@@ -229,11 +229,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testCheckboxWithValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="checkbox"]
     [
@@ -249,13 +249,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -271,14 +271,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/select
     [@name="name"]
     [@class="bar&baz form-control"]
@@ -294,14 +294,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleExpandedChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/div
     [@class="bar&baz"]
     [
@@ -331,14 +331,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSelectWithSizeBiggerThanOneCanBeRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, array(
-            'choices' => array('a', 'b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, [
+            'choices' => ['a', 'b'],
             'multiple' => false,
             'expanded' => false,
-            'attr' => array('size' => 2),
-        ));
+            'attr' => ['size' => 2],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => '')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => '']],
 '/select
     [@name="name"]
     [@required="required"]
@@ -350,14 +350,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -373,16 +373,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceWithPlaceholderWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'required' => false,
             'translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -399,14 +399,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -422,14 +422,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceWithPreferred()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => '-- sep --', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => '-- sep --', 'attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -446,14 +446,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceWithPreferredAndNoSeparator()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => null, 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => null, 'attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -469,14 +469,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceWithPreferredAndBlankSeparator()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => '', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => '', 'attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -493,14 +493,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testChoiceWithOnlyPreferred()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&a', '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&a', '&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@class="my&class form-control"]
     [count(./option)=2]
@@ -510,14 +510,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceNonRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -534,14 +534,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceNonRequiredNoneSelected()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -558,15 +558,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceNonRequiredWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'required' => false,
             'placeholder' => 'Select&Anything&Not&Me',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -583,15 +583,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceRequiredWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => false,
             'expanded' => false,
             'placeholder' => 'Test&Me',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -608,14 +608,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceRequiredWithPlaceholderViaView()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('placeholder' => '', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['placeholder' => '', 'attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -632,16 +632,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceGrouped()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array(
-                'Group&1' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-                'Group&2' => array('Choice&C' => '&c'),
-            ),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => [
+                'Group&1' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+                'Group&2' => ['Choice&C' => '&c'],
+            ],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -663,14 +663,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name[]"]
     [@class="my&class form-control"]
@@ -687,15 +687,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'required' => true,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name[]"]
     [@class="my&class form-control"]
@@ -712,14 +712,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceSkipsPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => true,
             'expanded' => false,
             'placeholder' => 'Test&Me',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name[]"]
     [@class="my&class form-control"]
@@ -735,14 +735,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceNonRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name[]"]
     [@class="my&class form-control"]
@@ -758,13 +758,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -793,14 +793,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -827,8 +827,8 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -838,9 +838,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -877,16 +877,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -913,14 +913,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -949,14 +949,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -985,15 +985,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'placeholder' => 'Test&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1031,16 +1031,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithPlaceholderWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choice_translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1078,13 +1078,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithBooleanValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', true, array(
-            'choices' => array('Choice&A' => '1', 'Choice&B' => '0'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', true, [
+            'choices' => ['Choice&A' => '1', 'Choice&B' => '0'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1113,14 +1113,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1158,14 +1158,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1192,8 +1192,8 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -1203,9 +1203,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/div
     [
         ./div
@@ -1242,16 +1242,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1278,15 +1278,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1324,15 +1324,15 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1372,7 +1372,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -1384,12 +1384,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testCountryWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT', [
             'placeholder' => 'Select&Country',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -1402,12 +1402,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTime()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', [
             'input' => 'string',
             'with_seconds' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [
         ./select
@@ -1438,13 +1438,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', null, [
             'input' => 'string',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1476,14 +1476,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeWithHourAndMinute()
     {
-        $data = array('year' => date('Y'), 'month' => '2', 'day' => '3', 'hour' => '4', 'minute' => '5');
+        $data = ['year' => date('Y'), 'month' => '2', 'day' => '3', 'hour' => '4', 'minute' => '5'];
 
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', $data, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', $data, [
             'input' => 'array',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1515,12 +1515,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeWithSeconds()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', [
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1556,13 +1556,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'date_widget' => 'single_text',
             'time_widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1585,14 +1585,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeWithWidgetSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'widget' => 'single_text',
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="datetime-local"]
     [@name="name"]
@@ -1604,16 +1604,16 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateTimeWithWidgetSingleTextIgnoreDateAndTimeWidgets()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'date_widget' => 'choice',
             'time_widget' => 'choice',
             'widget' => 'single_text',
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="datetime-local"]
     [@name="name"]
@@ -1625,12 +1625,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', date('Y').'-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', date('Y').'-02-03', [
             'input' => 'string',
             'widget' => 'choice',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1654,14 +1654,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateChoiceWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, [
             'input' => 'string',
             'widget' => 'choice',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1685,14 +1685,14 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateChoiceWithPlaceholderOnYear()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, [
             'input' => 'string',
             'widget' => 'choice',
             'required' => false,
-            'placeholder' => array('year' => 'Change&Me'),
-        ));
+            'placeholder' => ['year' => 'Change&Me'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1716,12 +1716,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', [
             'input' => 'string',
             'widget' => 'text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1748,12 +1748,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDateSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', [
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="date"]
     [@name="name"]
@@ -1765,11 +1765,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testBirthDay()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '2000-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '2000-02-03', [
             'input' => 'string',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1793,13 +1793,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testBirthDayWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '1950-01-01', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '1950-01-01', [
             'input' => 'string',
             'placeholder' => '',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -1828,7 +1828,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="email"]
     [@name="name"]
@@ -1841,11 +1841,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testEmailWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="email"]
     [@name="name"]
@@ -1860,7 +1860,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\HiddenType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="hidden"]
     [@name="name"]
@@ -1872,11 +1872,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testDisabled()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'disabled' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1890,7 +1890,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\IntegerType', 123);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="number"]
     [@name="name"]
@@ -1904,7 +1904,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\LanguageType', 'de');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -1918,7 +1918,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\LocaleType', 'de_AT');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -1930,11 +1930,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMoney()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, [
             'currency' => 'EUR',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="input-group"]
     [
@@ -1954,11 +1954,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testMoneyWithoutCurrency()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, [
             'currency' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/input
     [@id="my&id"]
     [@type="text"]
@@ -1975,7 +1975,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\NumberType', 1234.56);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1989,7 +1989,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="password"]
     [@name="name"]
@@ -2000,12 +2000,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testPasswordSubmittedWithNotAlwaysEmpty()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, [
             'always_empty' => false,
-        ));
+        ]);
         $form->submit('foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="password"]
     [@name="name"]
@@ -2017,11 +2017,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testPasswordWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="password"]
     [@name="name"]
@@ -2035,7 +2035,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PercentType', 0.1);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="input-group"]
     [
@@ -2057,7 +2057,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="radio"]
     [
@@ -2081,7 +2081,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="radio"]
     [
@@ -2102,11 +2102,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testRadioWithValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="radio"]
     [
@@ -2127,9 +2127,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testRange()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, array('attr' => array('min' => 5)));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, ['attr' => ['min' => 5]]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="range"]
     [@name="name"]
@@ -2142,9 +2142,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testRangeWithMinMaxValues()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, array('attr' => array('min' => 5, 'max' => 57)));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, ['attr' => ['min' => 5, 'max' => 57]]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="range"]
     [@name="name"]
@@ -2158,11 +2158,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTextarea()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextareaType', 'foo&bar', array(
-            'attr' => array('pattern' => 'foo'),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextareaType', 'foo&bar', [
+            'attr' => ['pattern' => 'foo'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/textarea
     [@name="name"]
     [@pattern="foo"]
@@ -2176,7 +2176,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="text"]
     [@name="name"]
@@ -2189,11 +2189,11 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTextWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="text"]
     [@name="name"]
@@ -2208,7 +2208,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\SearchType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="search"]
     [@name="name"]
@@ -2221,12 +2221,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTime()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'with_seconds' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -2248,12 +2248,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimeWithSeconds()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -2283,12 +2283,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimeText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'widget' => 'text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -2316,12 +2316,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimeSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="time"]
     [@name="name"]
@@ -2334,13 +2334,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimeWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, [
             'input' => 'string',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -2361,13 +2361,13 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimeWithPlaceholderOnYear()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, [
             'input' => 'string',
             'required' => false,
-            'placeholder' => array('hour' => 'Change&Me'),
-        ));
+            'placeholder' => ['hour' => 'Change&Me'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/div
     [@class="my&class form-inline"]
     [
@@ -2390,7 +2390,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', 'Europe/Vienna');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@name="name"]
     [@class="my&class form-control"]
@@ -2407,12 +2407,12 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testTimezoneWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', null, [
             'placeholder' => 'Select&Timezone',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/select
     [@class="my&class form-control"]
     [./option[@value=""][not(@selected)][not(@disabled)][.="[trans]Select&Timezone[/trans]"]]
@@ -2427,7 +2427,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
         $url = 'http://www.google.com?foo1=bar1&foo2=bar2';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\UrlType', $url);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
 '/input
     [@type="url"]
     [@name="name"]
@@ -2441,18 +2441,18 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/button[@type="button"][@name="name"][.="[trans]Name[/trans]"][@class="my&class btn"]'
         );
     }
 
     public function testButtonlabelWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
             'translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/button[@type="button"][@name="name"][.="Name"][@class="my&class btn"]'
         );
     }
@@ -2461,7 +2461,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\SubmitType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/button[@type="submit"][@name="name"][@class="my&class btn"]'
         );
     }
@@ -2470,18 +2470,18 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ResetType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/button[@type="reset"][@name="name"][@class="my&class btn"]'
         );
     }
 
     public function testWidgetAttributes()
     {
-        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', array(
+        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', [
             'required' => true,
             'disabled' => true,
-            'attr' => array('readonly' => true, 'maxlength' => 10, 'pattern' => '\d+', 'class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+            'attr' => ['readonly' => true, 'maxlength' => 10, 'pattern' => '\d+', 'class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2491,9 +2491,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testWidgetAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2503,10 +2503,10 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testButtonAttributes()
     {
-        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
+        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
             'disabled' => true,
-            'attr' => array('class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+            'attr' => ['class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2516,9 +2516,9 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 
     public function testButtonAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2531,7 +2531,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
         $tel = '0102030405';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TelType', $tel);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/input
     [@type="tel"]
     [@name="name"]
@@ -2546,7 +2546,7 @@ abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
         $color = '#0000ff';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ColorType', $color);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'my&class']],
             '/input
     [@type="color"]
     [@name="name"]
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4HorizontalLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4HorizontalLayoutTest.php
index 588c9a422b..e9416b0221 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4HorizontalLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4HorizontalLayoutTest.php
@@ -49,7 +49,7 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType');
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -63,11 +63,11 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     public function testLabelDoesNotRenderFieldAttributes()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -80,11 +80,11 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     public function testLabelWithCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -97,11 +97,11 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     public function testLabelWithCustomTextAndCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), 'Custom label', array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), 'Custom label', [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -114,14 +114,14 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
 
     public function testLabelWithCustomTextAsOptionAndCustomAttributesPassedDirectly()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        ]);
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -134,11 +134,11 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
 
     public function testLegendOnExpandedType()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, [
             'label' => 'Custom label',
             'expanded' => true,
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-        ));
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+        ]);
         $view = $form->createView();
         $this->renderWidget($view);
         $html = $this->renderLabel($view);
@@ -153,10 +153,10 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
 
     public function testStartTag()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -165,25 +165,25 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
 
     public function testStartTagWithOverriddenVars()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'put',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
+        $html = $this->renderStart($form->createView(), [
             'method' => 'post',
             'action' => 'http://foo.com/directory',
-        ));
+        ]);
 
         $this->assertSame('<form name="form" method="post" action="http://foo.com/directory">', $html);
     }
 
     public function testStartTagForMultipartForm()
     {
-        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'method' => 'get',
                 'action' => 'http://example.com/directory',
-            ))
+            ])
             ->add('file', 'Symfony\Component\Form\Extension\Core\Type\FileType')
             ->getForm();
 
@@ -194,14 +194,14 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
 
     public function testStartTagWithExtraAttributes()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
-            'attr' => array('class' => 'foobar'),
-        ));
+        $html = $this->renderStart($form->createView(), [
+            'attr' => ['class' => 'foobar'],
+        ]);
 
         $this->assertSame('<form name="form" method="get" action="http://example.com/directory" class="foobar">', $html);
     }
@@ -210,7 +210,7 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType');
         $view = $form->createView();
-        $html = $this->renderRow($view, array('label' => 'foo'));
+        $html = $this->renderRow($view, ['label' => 'foo']);
 
         $this->assertMatchesXpath($html, '/div[@class="form-group row"]/div[@class="col-sm-2" or @class="col-sm-10"]', 2);
     }
@@ -219,7 +219,7 @@ abstract class AbstractBootstrap4HorizontalLayoutTest extends AbstractBootstrap4
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType');
         $view = $form->createView();
-        $html = $this->renderRow($view, array('label' => 'foo', 'help' => 'really helpful text'));
+        $html = $this->renderRow($view, ['label' => 'foo', 'help' => 'really helpful text']);
 
         $this->assertMatchesXpath($html,
 '/div
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4LayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4LayoutTest.php
index 80c0796721..bec4159705 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4LayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AbstractBootstrap4LayoutTest.php
@@ -58,7 +58,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', DateType::class);
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -72,11 +72,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     public function testLabelDoesNotRenderFieldAttributes()
     {
         $form = $this->factory->createNamed('name', TextType::class);
-        $html = $this->renderLabel($form->createView(), null, array(
-            'attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -89,11 +89,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     public function testLabelWithCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', TextType::class);
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -106,11 +106,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     public function testLabelWithCustomTextAndCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', TextType::class);
-        $html = $this->renderLabel($form->createView(), 'Custom label', array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), 'Custom label', [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -123,14 +123,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testLabelWithCustomTextAsOptionAndCustomAttributesPassedDirectly()
     {
-        $form = $this->factory->createNamed('name', TextType::class, null, array(
+        $form = $this->factory->createNamed('name', TextType::class, null, [
             'label' => 'Custom label',
-        ));
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        ]);
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -143,11 +143,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testLegendOnExpandedType()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, null, array(
+        $form = $this->factory->createNamed('name', ChoiceType::class, null, [
             'label' => 'Custom label',
             'expanded' => true,
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-        ));
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+        ]);
         $view = $form->createView();
         $this->renderWidget($view);
         $html = $this->renderLabel($view);
@@ -162,9 +162,9 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testHelp()
     {
-        $form = $this->factory->createNamed('name', TextType::class, null, array(
+        $form = $this->factory->createNamed('name', TextType::class, null, [
             'help' => 'Help text test!',
-        ));
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -179,12 +179,12 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -224,7 +224,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testErrorWithNoLabel()
     {
-        $form = $this->factory->createNamed('name', TextType::class, array('label' => false));
+        $form = $this->factory->createNamed('name', TextType::class, ['label' => false]);
         $form->addError(new FormError('[trans]Error 1[/trans]'));
         $view = $form->createView();
         $html = $this->renderLabel($view);
@@ -236,7 +236,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', CheckboxType::class, true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -251,14 +251,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/select
     [@name="name"]
     [@class="bar&baz form-control"]
@@ -274,14 +274,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleExpandedChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/div
     [@class="bar&baz"]
     [
@@ -309,7 +309,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', CheckboxType::class, false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -323,11 +323,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testCheckboxWithValue()
     {
-        $form = $this->factory->createNamed('name', CheckboxType::class, false, array(
+        $form = $this->factory->createNamed('name', CheckboxType::class, false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -341,13 +341,13 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -372,14 +372,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -402,8 +402,8 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -413,9 +413,9 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -446,16 +446,16 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -478,14 +478,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -510,14 +510,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -542,15 +542,15 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'placeholder' => 'Test&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -582,16 +582,16 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithPlaceholderWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choice_translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -623,13 +623,13 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testSingleChoiceExpandedWithBooleanValue()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, true, array(
-            'choices' => array('Choice&A' => '1', 'Choice&B' => '0'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, true, [
+            'choices' => ['Choice&A' => '1', 'Choice&B' => '0'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -654,14 +654,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -693,14 +693,14 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -723,8 +723,8 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -734,9 +734,9 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/div
     [
         ./div
@@ -767,16 +767,16 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -799,15 +799,15 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -839,15 +839,15 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMultipleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', ChoiceType::class, array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', ChoiceType::class, ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -881,7 +881,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', RadioType::class, true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -903,7 +903,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', RadioType::class, false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -922,11 +922,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testRadioWithValue()
     {
-        $form = $this->factory->createNamed('name', RadioType::class, false, array(
+        $form = $this->factory->createNamed('name', RadioType::class, false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
 '/div
     [@class="form-check"]
     [
@@ -946,9 +946,9 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testButtonAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('button', ButtonType::class, null, array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('button', ButtonType::class, null, [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -960,7 +960,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', FileType::class);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'n/a', 'attr' => array('class' => 'my&class form-control-file')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'n/a', 'attr' => ['class' => 'my&class form-control-file']],
 '/div
     [@class="custom-file"]
     [
@@ -978,7 +978,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', FileType::class);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'n/a', 'attr' => array('class' => 'my&class form-control-file', 'placeholder' => 'Custom Placeholder')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'n/a', 'attr' => ['class' => 'my&class form-control-file', 'placeholder' => 'Custom Placeholder']],
 '/div
     [@class="custom-file"]
     [
@@ -994,11 +994,11 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMoney()
     {
-        $form = $this->factory->createNamed('name', MoneyType::class, 1234.56, array(
+        $form = $this->factory->createNamed('name', MoneyType::class, 1234.56, [
             'currency' => 'EUR',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
             '/div
     [@class="input-group"]
     [
@@ -1024,7 +1024,7 @@ abstract class AbstractBootstrap4LayoutTest extends AbstractBootstrap3LayoutTest
     {
         $form = $this->factory->createNamed('name', PercentType::class, 0.1);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('id' => 'my&id', 'attr' => array('class' => 'my&class')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['id' => 'my&id', 'attr' => ['class' => 'my&class']],
             '/div
     [@class="input-group"]
     [
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
index 2e95fe5845..874faeeb99 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/CodeExtensionTest.php
@@ -46,20 +46,20 @@ class CodeExtensionTest extends TestCase
 
     public function getClassNameProvider()
     {
-        return array(
-            array('F\Q\N\Foo', '<abbr title="F\Q\N\Foo">Foo</abbr>'),
-            array('Bare', '<abbr title="Bare">Bare</abbr>'),
-        );
+        return [
+            ['F\Q\N\Foo', '<abbr title="F\Q\N\Foo">Foo</abbr>'],
+            ['Bare', '<abbr title="Bare">Bare</abbr>'],
+        ];
     }
 
     public function getMethodNameProvider()
     {
-        return array(
-            array('F\Q\N\Foo::Method', '<abbr title="F\Q\N\Foo">Foo</abbr>::Method()'),
-            array('Bare::Method', '<abbr title="Bare">Bare</abbr>::Method()'),
-            array('Closure', '<abbr title="Closure">Closure</abbr>'),
-            array('Method', '<abbr title="Method">Method</abbr>()'),
-        );
+        return [
+            ['F\Q\N\Foo::Method', '<abbr title="F\Q\N\Foo">Foo</abbr>::Method()'],
+            ['Bare::Method', '<abbr title="Bare">Bare</abbr>::Method()'],
+            ['Closure', '<abbr title="Closure">Closure</abbr>'],
+            ['Method', '<abbr title="Method">Method</abbr>()'],
+        ];
     }
 
     public function testGetName()
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
index 9d8420e64d..167bcfeed3 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/DumpExtensionTest.php
@@ -27,11 +27,11 @@ class DumpExtensionTest extends TestCase
     public function testDumpTag($template, $debug, $expectedOutput, $expectedDumped)
     {
         $extension = new DumpExtension(new VarCloner());
-        $twig = new Environment(new ArrayLoader(array('template' => $template)), array(
+        $twig = new Environment(new ArrayLoader(['template' => $template]), [
             'debug' => $debug,
             'cache' => false,
             'optimizations' => 0,
-        ));
+        ]);
         $twig->addExtension($extension);
 
         $dumped = null;
@@ -54,11 +54,11 @@ class DumpExtensionTest extends TestCase
 
     public function getDumpTags()
     {
-        return array(
-            array('A{% dump %}B', true, 'AB', array()),
-            array('A{% set foo="bar"%}B{% dump %}C', true, 'ABC', array('foo' => 'bar')),
-            array('A{% dump %}B', false, 'AB', null),
-        );
+        return [
+            ['A{% dump %}B', true, 'AB', []],
+            ['A{% set foo="bar"%}B{% dump %}C', true, 'ABC', ['foo' => 'bar']],
+            ['A{% dump %}B', false, 'AB', null],
+        ];
     }
 
     /**
@@ -67,11 +67,11 @@ class DumpExtensionTest extends TestCase
     public function testDump($context, $args, $expectedOutput, $debug = true)
     {
         $extension = new DumpExtension(new VarCloner());
-        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array(
+        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), [
             'debug' => $debug,
             'cache' => false,
             'optimizations' => 0,
-        ));
+        ]);
 
         array_unshift($args, $context);
         array_unshift($args, $twig);
@@ -88,24 +88,24 @@ class DumpExtensionTest extends TestCase
 
     public function getDumpArgs()
     {
-        return array(
-            array(array(), array(), '', false),
-            array(array(), array(), "<pre class=sf-dump id=sf-dump data-indent-pad=\"  \">[]\n</pre><script>Sfdump(\"sf-dump\")</script>\n"),
-            array(
-                array(),
-                array(123, 456),
+        return [
+            [[], [], '', false],
+            [[], [], "<pre class=sf-dump id=sf-dump data-indent-pad=\"  \">[]\n</pre><script>Sfdump(\"sf-dump\")</script>\n"],
+            [
+                [],
+                [123, 456],
                 "<pre class=sf-dump id=sf-dump data-indent-pad=\"  \"><span class=sf-dump-num>123</span>\n</pre><script>Sfdump(\"sf-dump\")</script>\n"
                 ."<pre class=sf-dump id=sf-dump data-indent-pad=\"  \"><span class=sf-dump-num>456</span>\n</pre><script>Sfdump(\"sf-dump\")</script>\n",
-            ),
-            array(
-                array('foo' => 'bar'),
-                array(),
+            ],
+            [
+                ['foo' => 'bar'],
+                [],
                 "<pre class=sf-dump id=sf-dump data-indent-pad=\"  \"><span class=sf-dump-note>array:1</span> [<samp>\n"
                 ."  \"<span class=sf-dump-key>foo</span>\" => \"<span class=sf-dump-str title=\"3 characters\">bar</span>\"\n"
                 ."</samp>]\n"
                 ."</pre><script>Sfdump(\"sf-dump\")</script>\n",
-            ),
-        );
+            ],
+        ];
     }
 
     public function testCustomDumper()
@@ -123,13 +123,13 @@ class DumpExtensionTest extends TestCase
             '</pre><script>Sfdump("%s")</script>'
         );
         $extension = new DumpExtension(new VarCloner(), $dumper);
-        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array(
+        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), [
             'debug' => true,
             'cache' => false,
             'optimizations' => 0,
-        ));
+        ]);
 
-        $dump = $extension->dump($twig, array(), 'foo');
+        $dump = $extension->dump($twig, [], 'foo');
         $dump = preg_replace('/sf-dump-\d+/', 'sf-dump', $dump);
 
         $this->assertEquals(
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
index b2ee22c6a9..bfb9c578bb 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/ExpressionExtensionTest.php
@@ -21,7 +21,7 @@ class ExpressionExtensionTest extends TestCase
     public function testExpressionCreation()
     {
         $template = "{{ expression('1 == 1') }}";
-        $twig = new Environment(new ArrayLoader(array('template' => $template)), array('debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0));
+        $twig = new Environment(new ArrayLoader(['template' => $template]), ['debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new ExpressionExtension());
 
         $output = $twig->render('template');
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/Fixtures/StubTranslator.php b/src/Symfony/Bridge/Twig/Tests/Extension/Fixtures/StubTranslator.php
index bd9191161a..55c0dfa18a 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/Fixtures/StubTranslator.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/Fixtures/StubTranslator.php
@@ -15,7 +15,7 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class StubTranslator implements TranslatorInterface
 {
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         return '[trans]'.$id.'[/trans]';
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3HorizontalLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3HorizontalLayoutTest.php
index 5c82a00fcb..384b9391cc 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3HorizontalLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3HorizontalLayoutTest.php
@@ -24,9 +24,9 @@ class FormExtensionBootstrap3HorizontalLayoutTest extends AbstractBootstrap3Hori
 {
     use RuntimeLoaderProvider;
 
-    protected $testableFeatures = array(
+    protected $testableFeatures = [
         'choice_attr',
-    );
+    ];
 
     /**
      * @var FormRenderer
@@ -37,32 +37,32 @@ class FormExtensionBootstrap3HorizontalLayoutTest extends AbstractBootstrap3Hori
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_3_horizontal_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -78,27 +78,27 @@ class FormExtensionBootstrap3HorizontalLayoutTest extends AbstractBootstrap3Hori
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3LayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3LayoutTest.php
index c6a946494e..2e75e3f7a8 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3LayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap3LayoutTest.php
@@ -33,29 +33,29 @@ class FormExtensionBootstrap3LayoutTest extends AbstractBootstrap3LayoutTest
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_3_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -64,10 +64,10 @@ class FormExtensionBootstrap3LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -76,18 +76,18 @@ class FormExtensionBootstrap3LayoutTest extends AbstractBootstrap3LayoutTest
 
     public function testMoneyWidgetInIso()
     {
-        $environment = new Environment(new StubFilesystemLoader(array(
+        $environment = new Environment(new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        )), array('strict_variables' => true));
+        ]), ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
         $environment->setCharset('ISO-8859-1');
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_3_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
 
@@ -104,15 +104,15 @@ HTML
         , trim($this->renderWidget($view)));
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -128,27 +128,27 @@ HTML
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4HorizontalLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4HorizontalLayoutTest.php
index a356921509..243658764c 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4HorizontalLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4HorizontalLayoutTest.php
@@ -29,9 +29,9 @@ class FormExtensionBootstrap4HorizontalLayoutTest extends AbstractBootstrap4Hori
 {
     use RuntimeLoaderProvider;
 
-    protected $testableFeatures = array(
+    protected $testableFeatures = [
         'choice_attr',
-    );
+    ];
 
     private $renderer;
 
@@ -39,32 +39,32 @@ class FormExtensionBootstrap4HorizontalLayoutTest extends AbstractBootstrap4Hori
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_4_horizontal_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -80,27 +80,27 @@ class FormExtensionBootstrap4HorizontalLayoutTest extends AbstractBootstrap4Hori
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4LayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4LayoutTest.php
index fdf9c7a5ab..a0290a2049 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4LayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionBootstrap4LayoutTest.php
@@ -37,29 +37,29 @@ class FormExtensionBootstrap4LayoutTest extends AbstractBootstrap4LayoutTest
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_4_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -68,10 +68,10 @@ class FormExtensionBootstrap4LayoutTest extends AbstractBootstrap4LayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -80,18 +80,18 @@ class FormExtensionBootstrap4LayoutTest extends AbstractBootstrap4LayoutTest
 
     public function testMoneyWidgetInIso()
     {
-        $environment = new Environment(new StubFilesystemLoader(array(
+        $environment = new Environment(new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        )), array('strict_variables' => true));
+        ]), ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
         $environment->setCharset('ISO-8859-1');
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'bootstrap_4_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
 
@@ -108,15 +108,15 @@ HTML
         , trim($this->renderWidget($view)));
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -132,27 +132,27 @@ HTML
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionDivLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionDivLayoutTest.php
index 4a2df0289f..330b8e70fa 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionDivLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionDivLayoutTest.php
@@ -35,22 +35,22 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addGlobal('global', '');
         // the value can be any template that exists
         $environment->addGlobal('dynamic_template_name', 'child_label');
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'form_div_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
@@ -62,7 +62,7 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
             ->createView()
         ;
 
-        $this->setTheme($view, array('theme_use.html.twig'));
+        $this->setTheme($view, ['theme_use.html.twig']);
 
         $this->assertMatchesXpath(
             $this->renderWidget($view),
@@ -77,7 +77,7 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
             ->createView()
         ;
 
-        $this->setTheme($view, array('theme_extends.html.twig'));
+        $this->setTheme($view, ['theme_extends.html.twig']);
 
         $this->assertMatchesXpath(
             $this->renderWidget($view),
@@ -92,7 +92,7 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
             ->createView()
         ;
 
-        $this->renderer->setTheme($view, array('page_dynamic_extends.html.twig'));
+        $this->renderer->setTheme($view, ['page_dynamic_extends.html.twig']);
         $this->assertMatchesXpath(
             $this->renderer->searchAndRenderBlock($view, 'row'),
             '/div/label[text()="child"]'
@@ -101,18 +101,18 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function isSelectedChoiceProvider()
     {
-        return array(
-            array(true, '0', '0'),
-            array(true, '1', '1'),
-            array(true, '', ''),
-            array(true, '1.23', '1.23'),
-            array(true, 'foo', 'foo'),
-            array(true, 'foo10', 'foo10'),
-            array(true, 'foo', array(1, 'foo', 'foo10')),
+        return [
+            [true, '0', '0'],
+            [true, '1', '1'],
+            [true, '', ''],
+            [true, '1.23', '1.23'],
+            [true, 'foo', 'foo'],
+            [true, 'foo10', 'foo10'],
+            [true, 'foo', [1, 'foo', 'foo10']],
 
-            array(false, 10, array(1, 'foo', 'foo10')),
-            array(false, 0, array(1, 'foo', 'foo10')),
-        );
+            [false, 10, [1, 'foo', 'foo10']],
+            [false, 0, [1, 'foo', 'foo10']],
+        ];
     }
 
     /**
@@ -127,10 +127,10 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -139,10 +139,10 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -151,10 +151,10 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function isRootFormProvider()
     {
-        return array(
-            array(true, new FormView()),
-            array(false, new FormView(new FormView())),
-        );
+        return [
+            [true, new FormView()],
+            [false, new FormView(new FormView())],
+        ];
     }
 
     /**
@@ -167,18 +167,18 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function testMoneyWidgetInIso()
     {
-        $environment = new Environment(new StubFilesystemLoader(array(
+        $environment = new Environment(new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        )), array('strict_variables' => true));
+        ]), ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addExtension(new FormExtension());
         $environment->setCharset('ISO-8859-1');
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'form_div_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
 
@@ -192,12 +192,12 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -210,15 +210,15 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
         );
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -234,27 +234,27 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
@@ -266,15 +266,15 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
 
     public static function themeBlockInheritanceProvider()
     {
-        return array(
-            array(array('theme.html.twig')),
-        );
+        return [
+            [['theme.html.twig']],
+        ];
     }
 
     public static function themeInheritanceProvider()
     {
-        return array(
-            array(array('parent_label.html.twig'), array('child_label.html.twig')),
-        );
+        return [
+            [['parent_label.html.twig'], ['child_label.html.twig']],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionTableLayoutTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionTableLayoutTest.php
index ec00764a76..0b712562a9 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionTableLayoutTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/FormExtensionTableLayoutTest.php
@@ -34,30 +34,30 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
     {
         parent::setUp();
 
-        $loader = new StubFilesystemLoader(array(
+        $loader = new StubFilesystemLoader([
             __DIR__.'/../../Resources/views/Form',
             __DIR__.'/Fixtures/templates/form',
-        ));
+        ]);
 
-        $environment = new Environment($loader, array('strict_variables' => true));
+        $environment = new Environment($loader, ['strict_variables' => true]);
         $environment->addExtension(new TranslationExtension(new StubTranslator()));
         $environment->addGlobal('global', '');
         $environment->addExtension(new FormExtension());
 
-        $rendererEngine = new TwigRendererEngine(array(
+        $rendererEngine = new TwigRendererEngine([
             'form_table_layout.html.twig',
             'custom_widgets.html.twig',
-        ), $environment);
+        ], $environment);
         $this->renderer = new FormRenderer($rendererEngine, $this->getMockBuilder('Symfony\Component\Security\Csrf\CsrfTokenManagerInterface')->getMock());
         $this->registerTwigRuntimeLoader($environment, $this->renderer);
     }
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -66,10 +66,10 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -78,12 +78,12 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -96,15 +96,15 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
         );
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form', $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         if (null !== $label) {
-            $vars += array('label' => $label);
+            $vars += ['label' => $label];
         }
 
         return (string) $this->renderer->searchAndRenderBlock($view, 'label', $vars);
@@ -120,27 +120,27 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
         return (string) $this->renderer->searchAndRenderBlock($view, 'errors');
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'widget', $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'row', $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->searchAndRenderBlock($view, 'rest', $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_start', $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->renderer->renderBlock($view, 'form_end', $vars);
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
index dcabc5739b..38ee375b94 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/HttpFoundationExtensionTest.php
@@ -33,25 +33,25 @@ class HttpFoundationExtensionTest extends TestCase
 
     public function getGenerateAbsoluteUrlData()
     {
-        return array(
-            array('http://localhost/foo.png', '/foo.png', '/foo/bar.html'),
-            array('http://localhost/foo/foo.png', 'foo.png', '/foo/bar.html'),
-            array('http://localhost/foo/foo.png', 'foo.png', '/foo/bar'),
-            array('http://localhost/foo/bar/foo.png', 'foo.png', '/foo/bar/'),
+        return [
+            ['http://localhost/foo.png', '/foo.png', '/foo/bar.html'],
+            ['http://localhost/foo/foo.png', 'foo.png', '/foo/bar.html'],
+            ['http://localhost/foo/foo.png', 'foo.png', '/foo/bar'],
+            ['http://localhost/foo/bar/foo.png', 'foo.png', '/foo/bar/'],
 
-            array('http://example.com/baz', 'http://example.com/baz', '/'),
-            array('https://example.com/baz', 'https://example.com/baz', '/'),
-            array('//example.com/baz', '//example.com/baz', '/'),
+            ['http://example.com/baz', 'http://example.com/baz', '/'],
+            ['https://example.com/baz', 'https://example.com/baz', '/'],
+            ['//example.com/baz', '//example.com/baz', '/'],
 
-            array('http://localhost/foo/bar?baz', '?baz', '/foo/bar'),
-            array('http://localhost/foo/bar?baz=1', '?baz=1', '/foo/bar?foo=1'),
-            array('http://localhost/foo/baz?baz=1', 'baz?baz=1', '/foo/bar?foo=1'),
+            ['http://localhost/foo/bar?baz', '?baz', '/foo/bar'],
+            ['http://localhost/foo/bar?baz=1', '?baz=1', '/foo/bar?foo=1'],
+            ['http://localhost/foo/baz?baz=1', 'baz?baz=1', '/foo/bar?foo=1'],
 
-            array('http://localhost/foo/bar#baz', '#baz', '/foo/bar'),
-            array('http://localhost/foo/bar?0#baz', '#baz', '/foo/bar?0'),
-            array('http://localhost/foo/bar?baz=1#baz', '?baz=1#baz', '/foo/bar?foo=1'),
-            array('http://localhost/foo/baz?baz=1#baz', 'baz?baz=1#baz', '/foo/bar?foo=1'),
-        );
+            ['http://localhost/foo/bar#baz', '#baz', '/foo/bar'],
+            ['http://localhost/foo/bar?0#baz', '#baz', '/foo/bar?0'],
+            ['http://localhost/foo/bar?baz=1#baz', '?baz=1#baz', '/foo/bar?foo=1'],
+            ['http://localhost/foo/baz?baz=1#baz', 'baz?baz=1#baz', '/foo/bar?foo=1'],
+        ];
     }
 
     /**
@@ -85,16 +85,16 @@ class HttpFoundationExtensionTest extends TestCase
 
     public function getGenerateAbsoluteUrlRequestContextData()
     {
-        return array(
-            array('/foo.png', '/foo', 'localhost', 'http', 80, 443, 'http://localhost/foo.png'),
-            array('foo.png', '/foo', 'localhost', 'http', 80, 443, 'http://localhost/foo/foo.png'),
-            array('foo.png', '/foo/bar/', 'localhost', 'http', 80, 443, 'http://localhost/foo/bar/foo.png'),
-            array('/foo.png', '/foo', 'localhost', 'https', 80, 443, 'https://localhost/foo.png'),
-            array('foo.png', '/foo', 'localhost', 'https', 80, 443, 'https://localhost/foo/foo.png'),
-            array('foo.png', '/foo/bar/', 'localhost', 'https', 80, 443, 'https://localhost/foo/bar/foo.png'),
-            array('/foo.png', '/foo', 'localhost', 'http', 443, 80, 'http://localhost:443/foo.png'),
-            array('/foo.png', '/foo', 'localhost', 'https', 443, 80, 'https://localhost:80/foo.png'),
-        );
+        return [
+            ['/foo.png', '/foo', 'localhost', 'http', 80, 443, 'http://localhost/foo.png'],
+            ['foo.png', '/foo', 'localhost', 'http', 80, 443, 'http://localhost/foo/foo.png'],
+            ['foo.png', '/foo/bar/', 'localhost', 'http', 80, 443, 'http://localhost/foo/bar/foo.png'],
+            ['/foo.png', '/foo', 'localhost', 'https', 80, 443, 'https://localhost/foo.png'],
+            ['foo.png', '/foo', 'localhost', 'https', 80, 443, 'https://localhost/foo/foo.png'],
+            ['foo.png', '/foo/bar/', 'localhost', 'https', 80, 443, 'https://localhost/foo/bar/foo.png'],
+            ['/foo.png', '/foo', 'localhost', 'http', 443, 80, 'http://localhost:443/foo.png'],
+            ['/foo.png', '/foo', 'localhost', 'https', 443, 80, 'https://localhost:80/foo.png'],
+        ];
     }
 
     public function testGenerateAbsoluteUrlWithScriptFileName()
@@ -130,14 +130,14 @@ class HttpFoundationExtensionTest extends TestCase
 
     public function getGenerateRelativePathData()
     {
-        return array(
-            array('../foo.png', '/foo.png', '/foo/bar.html'),
-            array('../baz/foo.png', '/baz/foo.png', '/foo/bar.html'),
-            array('baz/foo.png', 'baz/foo.png', '/foo/bar.html'),
+        return [
+            ['../foo.png', '/foo.png', '/foo/bar.html'],
+            ['../baz/foo.png', '/baz/foo.png', '/foo/bar.html'],
+            ['baz/foo.png', 'baz/foo.png', '/foo/bar.html'],
 
-            array('http://example.com/baz', 'http://example.com/baz', '/'),
-            array('https://example.com/baz', 'https://example.com/baz', '/'),
-            array('//example.com/baz', '//example.com/baz', '/'),
-        );
+            ['http://example.com/baz', 'http://example.com/baz', '/'],
+            ['https://example.com/baz', 'https://example.com/baz', '/'],
+            ['//example.com/baz', '//example.com/baz', '/'],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
index 9f19847eb8..9fe36b40c9 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/HttpKernelExtensionTest.php
@@ -72,19 +72,19 @@ class HttpKernelExtensionTest extends TestCase
 
         $context->expects($this->any())->method('getCurrentRequest')->will($this->returnValue(Request::create('/')));
 
-        return new FragmentHandler($context, array($strategy), false);
+        return new FragmentHandler($context, [$strategy], false);
     }
 
     protected function renderTemplate(FragmentHandler $renderer, $template = '{{ render("foo") }}')
     {
-        $loader = new ArrayLoader(array('index' => $template));
-        $twig = new Environment($loader, array('debug' => true, 'cache' => false));
+        $loader = new ArrayLoader(['index' => $template]);
+        $twig = new Environment($loader, ['debug' => true, 'cache' => false]);
         $twig->addExtension(new HttpKernelExtension());
 
         $loader = $this->getMockBuilder('Twig\RuntimeLoader\RuntimeLoaderInterface')->getMock();
-        $loader->expects($this->any())->method('load')->will($this->returnValueMap(array(
-            array('Symfony\Bridge\Twig\Extension\HttpKernelRuntime', new HttpKernelRuntime($renderer)),
-        )));
+        $loader->expects($this->any())->method('load')->will($this->returnValueMap([
+            ['Symfony\Bridge\Twig\Extension\HttpKernelRuntime', new HttpKernelRuntime($renderer)],
+        ]));
         $twig->addRuntimeLoader($loader);
 
         return $twig->render('index');
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
index fdff039851..05f7ad741c 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/RoutingExtensionTest.php
@@ -24,7 +24,7 @@ class RoutingExtensionTest extends TestCase
      */
     public function testEscaping($template, $mustBeEscaped)
     {
-        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0));
+        $twig = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new RoutingExtension($this->getMockBuilder('Symfony\Component\Routing\Generator\UrlGeneratorInterface')->getMock()));
 
         $nodes = $twig->parse($twig->tokenize(new Source($template, '')));
@@ -34,21 +34,21 @@ class RoutingExtensionTest extends TestCase
 
     public function getEscapingTemplates()
     {
-        return array(
-            array('{{ path("foo") }}', false),
-            array('{{ path("foo", {}) }}', false),
-            array('{{ path("foo", { foo: "foo" }) }}', false),
-            array('{{ path("foo", foo) }}', true),
-            array('{{ path("foo", { foo: foo }) }}', true),
-            array('{{ path("foo", { foo: ["foo", "bar"] }) }}', true),
-            array('{{ path("foo", { foo: "foo", bar: "bar" }) }}', true),
+        return [
+            ['{{ path("foo") }}', false],
+            ['{{ path("foo", {}) }}', false],
+            ['{{ path("foo", { foo: "foo" }) }}', false],
+            ['{{ path("foo", foo) }}', true],
+            ['{{ path("foo", { foo: foo }) }}', true],
+            ['{{ path("foo", { foo: ["foo", "bar"] }) }}', true],
+            ['{{ path("foo", { foo: "foo", bar: "bar" }) }}', true],
 
-            array('{{ path(name = "foo", parameters = {}) }}', false),
-            array('{{ path(name = "foo", parameters = { foo: "foo" }) }}', false),
-            array('{{ path(name = "foo", parameters = foo) }}', true),
-            array('{{ path(name = "foo", parameters = { foo: ["foo", "bar"] }) }}', true),
-            array('{{ path(name = "foo", parameters = { foo: foo }) }}', true),
-            array('{{ path(name = "foo", parameters = { foo: "foo", bar: "bar" }) }}', true),
-        );
+            ['{{ path(name = "foo", parameters = {}) }}', false],
+            ['{{ path(name = "foo", parameters = { foo: "foo" }) }}', false],
+            ['{{ path(name = "foo", parameters = foo) }}', true],
+            ['{{ path(name = "foo", parameters = { foo: ["foo", "bar"] }) }}', true],
+            ['{{ path(name = "foo", parameters = { foo: foo }) }}', true],
+            ['{{ path(name = "foo", parameters = { foo: "foo", bar: "bar" }) }}', true],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/RuntimeLoaderProvider.php b/src/Symfony/Bridge/Twig/Tests/Extension/RuntimeLoaderProvider.php
index 4934bef87d..0bec8ec6f1 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/RuntimeLoaderProvider.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/RuntimeLoaderProvider.php
@@ -19,9 +19,9 @@ trait RuntimeLoaderProvider
     protected function registerTwigRuntimeLoader(Environment $environment, FormRenderer $renderer)
     {
         $loader = $this->getMockBuilder('Twig\RuntimeLoader\RuntimeLoaderInterface')->getMock();
-        $loader->expects($this->any())->method('load')->will($this->returnValueMap(array(
-            array('Symfony\Component\Form\FormRenderer', $renderer),
-        )));
+        $loader->expects($this->any())->method('load')->will($this->returnValueMap([
+            ['Symfony\Component\Form\FormRenderer', $renderer],
+        ]));
         $environment->addRuntimeLoader($loader);
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
index 901425b1b9..1af65e4c19 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/StopwatchExtensionTest.php
@@ -24,7 +24,7 @@ class StopwatchExtensionTest extends TestCase
      */
     public function testFailIfStoppingWrongEvent()
     {
-        $this->testTiming('{% stopwatch "foo" %}{% endstopwatch "bar" %}', array());
+        $this->testTiming('{% stopwatch "foo" %}{% endstopwatch "bar" %}', []);
     }
 
     /**
@@ -32,7 +32,7 @@ class StopwatchExtensionTest extends TestCase
      */
     public function testTiming($template, $events)
     {
-        $twig = new Environment(new ArrayLoader(array('template' => $template)), array('debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0));
+        $twig = new Environment(new ArrayLoader(['template' => $template]), ['debug' => true, 'cache' => false, 'autoescape' => 'html', 'optimizations' => 0]);
         $twig->addExtension(new StopwatchExtension($this->getStopwatch($events)));
 
         try {
@@ -44,19 +44,19 @@ class StopwatchExtensionTest extends TestCase
 
     public function getTimingTemplates()
     {
-        return array(
-            array('{% stopwatch "foo" %}something{% endstopwatch %}', 'foo'),
-            array('{% stopwatch "foo" %}symfony is fun{% endstopwatch %}{% stopwatch "bar" %}something{% endstopwatch %}', array('foo', 'bar')),
-            array('{% set foo = "foo" %}{% stopwatch foo %}something{% endstopwatch %}', 'foo'),
-            array('{% set foo = "foo" %}{% stopwatch foo %}something {% set foo = "bar" %}{% endstopwatch %}', 'foo'),
-            array('{% stopwatch "foo.bar" %}something{% endstopwatch %}', 'foo.bar'),
-            array('{% stopwatch "foo" %}something{% endstopwatch %}{% stopwatch "foo" %}something else{% endstopwatch %}', array('foo', 'foo')),
-        );
+        return [
+            ['{% stopwatch "foo" %}something{% endstopwatch %}', 'foo'],
+            ['{% stopwatch "foo" %}symfony is fun{% endstopwatch %}{% stopwatch "bar" %}something{% endstopwatch %}', ['foo', 'bar']],
+            ['{% set foo = "foo" %}{% stopwatch foo %}something{% endstopwatch %}', 'foo'],
+            ['{% set foo = "foo" %}{% stopwatch foo %}something {% set foo = "bar" %}{% endstopwatch %}', 'foo'],
+            ['{% stopwatch "foo.bar" %}something{% endstopwatch %}', 'foo.bar'],
+            ['{% stopwatch "foo" %}something{% endstopwatch %}{% stopwatch "foo" %}something else{% endstopwatch %}', ['foo', 'foo']],
+        ];
     }
 
-    protected function getStopwatch($events = array())
+    protected function getStopwatch($events = [])
     {
-        $events = \is_array($events) ? $events : array($events);
+        $events = \is_array($events) ? $events : [$events];
         $stopwatch = $this->getMockBuilder('Symfony\Component\Stopwatch\Stopwatch')->getMock();
 
         $i = -1;
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
index bb36cda8ea..de85603a53 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/TranslationExtensionTest.php
@@ -22,7 +22,7 @@ class TranslationExtensionTest extends TestCase
 {
     public function testEscaping()
     {
-        $output = $this->getTemplate('{% trans %}Percent: %value%%% (%msg%){% endtrans %}')->render(array('value' => 12, 'msg' => 'approx.'));
+        $output = $this->getTemplate('{% trans %}Percent: %value%%% (%msg%){% endtrans %}')->render(['value' => 12, 'msg' => 'approx.']);
 
         $this->assertEquals('Percent: 12% (approx.)', $output);
     }
@@ -30,12 +30,12 @@ class TranslationExtensionTest extends TestCase
     /**
      * @dataProvider getTransTests
      */
-    public function testTrans($template, $expected, array $variables = array())
+    public function testTrans($template, $expected, array $variables = [])
     {
         if ($expected != $this->getTemplate($template)->render($variables)) {
             echo $template."\n";
-            $loader = new TwigArrayLoader(array('index' => $template));
-            $twig = new Environment($loader, array('debug' => true, 'cache' => false));
+            $loader = new TwigArrayLoader(['index' => $template]);
+            $twig = new Environment($loader, ['debug' => true, 'cache' => false]);
             $twig->addExtension(new TranslationExtension(new Translator('en')));
 
             echo $twig->compile($twig->parse($twig->tokenize($twig->getLoader()->getSourceContext('index'))))."\n\n";
@@ -49,7 +49,7 @@ class TranslationExtensionTest extends TestCase
      * @group legacy
      * @dataProvider getTransChoiceTests
      */
-    public function testTransChoice($template, $expected, array $variables = array())
+    public function testTransChoice($template, $expected, array $variables = [])
     {
         $this->testTrans($template, $expected, $variables);
     }
@@ -84,62 +84,62 @@ class TranslationExtensionTest extends TestCase
 
     public function getTransTests()
     {
-        return array(
+        return [
             // trans tag
-            array('{% trans %}Hello{% endtrans %}', 'Hello'),
-            array('{% trans %}%name%{% endtrans %}', 'Symfony', array('name' => 'Symfony')),
+            ['{% trans %}Hello{% endtrans %}', 'Hello'],
+            ['{% trans %}%name%{% endtrans %}', 'Symfony', ['name' => 'Symfony']],
 
-            array('{% trans from elsewhere %}Hello{% endtrans %}', 'Hello'),
+            ['{% trans from elsewhere %}Hello{% endtrans %}', 'Hello'],
 
-            array('{% trans %}Hello %name%{% endtrans %}', 'Hello Symfony', array('name' => 'Symfony')),
-            array('{% trans with { \'%name%\': \'Symfony\' } %}Hello %name%{% endtrans %}', 'Hello Symfony'),
-            array('{% set vars = { \'%name%\': \'Symfony\' } %}{% trans with vars %}Hello %name%{% endtrans %}', 'Hello Symfony'),
+            ['{% trans %}Hello %name%{% endtrans %}', 'Hello Symfony', ['name' => 'Symfony']],
+            ['{% trans with { \'%name%\': \'Symfony\' } %}Hello %name%{% endtrans %}', 'Hello Symfony'],
+            ['{% set vars = { \'%name%\': \'Symfony\' } %}{% trans with vars %}Hello %name%{% endtrans %}', 'Hello Symfony'],
 
-            array('{% trans into "fr"%}Hello{% endtrans %}', 'Hello'),
+            ['{% trans into "fr"%}Hello{% endtrans %}', 'Hello'],
 
             // trans with count
-            array(
+            [
                 '{% trans from "messages" %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtrans %}',
                 'There is no apples',
-                array('count' => 0),
-            ),
-            array(
+                ['count' => 0],
+            ],
+            [
                 '{% trans %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtrans %}',
                 'There is 5 apples',
-                array('count' => 5),
-            ),
-            array(
+                ['count' => 5],
+            ],
+            [
                 '{% trans %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%){% endtrans %}',
                 'There is 5 apples (Symfony)',
-                array('count' => 5, 'name' => 'Symfony'),
-            ),
-            array(
+                ['count' => 5, 'name' => 'Symfony'],
+            ],
+            [
                 '{% trans with { \'%name%\': \'Symfony\' } %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%){% endtrans %}',
                 'There is 5 apples (Symfony)',
-                array('count' => 5),
-            ),
-            array(
+                ['count' => 5],
+            ],
+            [
                 '{% trans into "fr"%}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtrans %}',
                 'There is no apples',
-                array('count' => 0),
-            ),
-            array(
+                ['count' => 0],
+            ],
+            [
                 '{% trans count 5 into "fr"%}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtrans %}',
                 'There is 5 apples',
-            ),
+            ],
 
             // trans filter
-            array('{{ "Hello"|trans }}', 'Hello'),
-            array('{{ name|trans }}', 'Symfony', array('name' => 'Symfony')),
-            array('{{ hello|trans({ \'%name%\': \'Symfony\' }) }}', 'Hello Symfony', array('hello' => 'Hello %name%')),
-            array('{% set vars = { \'%name%\': \'Symfony\' } %}{{ hello|trans(vars) }}', 'Hello Symfony', array('hello' => 'Hello %name%')),
-            array('{{ "Hello"|trans({}, "messages", "fr") }}', 'Hello'),
+            ['{{ "Hello"|trans }}', 'Hello'],
+            ['{{ name|trans }}', 'Symfony', ['name' => 'Symfony']],
+            ['{{ hello|trans({ \'%name%\': \'Symfony\' }) }}', 'Hello Symfony', ['hello' => 'Hello %name%']],
+            ['{% set vars = { \'%name%\': \'Symfony\' } %}{{ hello|trans(vars) }}', 'Hello Symfony', ['hello' => 'Hello %name%']],
+            ['{{ "Hello"|trans({}, "messages", "fr") }}', 'Hello'],
 
             // trans filter with count
-            array('{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|trans(count=count) }}', 'There is 5 apples', array('count' => 5)),
-            array('{{ text|trans(count=5, arguments={\'%name%\': \'Symfony\'}) }}', 'There is 5 apples (Symfony)', array('text' => '{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%)')),
-            array('{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|trans({}, "messages", "fr", count) }}', 'There is 5 apples', array('count' => 5)),
-        );
+            ['{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|trans(count=count) }}', 'There is 5 apples', ['count' => 5]],
+            ['{{ text|trans(count=5, arguments={\'%name%\': \'Symfony\'}) }}', 'There is 5 apples (Symfony)', ['text' => '{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%)']],
+            ['{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|trans({}, "messages", "fr", count) }}', 'There is 5 apples', ['count' => 5]],
+        ];
     }
 
     /**
@@ -147,67 +147,67 @@ class TranslationExtensionTest extends TestCase
      */
     public function getTransChoiceTests()
     {
-        return array(
+        return [
             // trans tag
-            array('{% trans %}Hello{% endtrans %}', 'Hello'),
-            array('{% trans %}%name%{% endtrans %}', 'Symfony', array('name' => 'Symfony')),
+            ['{% trans %}Hello{% endtrans %}', 'Hello'],
+            ['{% trans %}%name%{% endtrans %}', 'Symfony', ['name' => 'Symfony']],
 
-            array('{% trans from elsewhere %}Hello{% endtrans %}', 'Hello'),
+            ['{% trans from elsewhere %}Hello{% endtrans %}', 'Hello'],
 
-            array('{% trans %}Hello %name%{% endtrans %}', 'Hello Symfony', array('name' => 'Symfony')),
-            array('{% trans with { \'%name%\': \'Symfony\' } %}Hello %name%{% endtrans %}', 'Hello Symfony'),
-            array('{% set vars = { \'%name%\': \'Symfony\' } %}{% trans with vars %}Hello %name%{% endtrans %}', 'Hello Symfony'),
+            ['{% trans %}Hello %name%{% endtrans %}', 'Hello Symfony', ['name' => 'Symfony']],
+            ['{% trans with { \'%name%\': \'Symfony\' } %}Hello %name%{% endtrans %}', 'Hello Symfony'],
+            ['{% set vars = { \'%name%\': \'Symfony\' } %}{% trans with vars %}Hello %name%{% endtrans %}', 'Hello Symfony'],
 
-            array('{% trans into "fr"%}Hello{% endtrans %}', 'Hello'),
+            ['{% trans into "fr"%}Hello{% endtrans %}', 'Hello'],
 
             // transchoice
-            array(
+            [
                 '{% transchoice count from "messages" %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtranschoice %}',
                 'There is no apples',
-                array('count' => 0),
-            ),
-            array(
+                ['count' => 0],
+            ],
+            [
                 '{% transchoice count %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtranschoice %}',
                 'There is 5 apples',
-                array('count' => 5),
-            ),
-            array(
+                ['count' => 5],
+            ],
+            [
                 '{% transchoice count %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%){% endtranschoice %}',
                 'There is 5 apples (Symfony)',
-                array('count' => 5, 'name' => 'Symfony'),
-            ),
-            array(
+                ['count' => 5, 'name' => 'Symfony'],
+            ],
+            [
                 '{% transchoice count with { \'%name%\': \'Symfony\' } %}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%){% endtranschoice %}',
                 'There is 5 apples (Symfony)',
-                array('count' => 5),
-            ),
-            array(
+                ['count' => 5],
+            ],
+            [
                 '{% transchoice count into "fr"%}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtranschoice %}',
                 'There is no apples',
-                array('count' => 0),
-            ),
-            array(
+                ['count' => 0],
+            ],
+            [
                 '{% transchoice 5 into "fr"%}{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples{% endtranschoice %}',
                 'There is 5 apples',
-            ),
+            ],
 
             // trans filter
-            array('{{ "Hello"|trans }}', 'Hello'),
-            array('{{ name|trans }}', 'Symfony', array('name' => 'Symfony')),
-            array('{{ hello|trans({ \'%name%\': \'Symfony\' }) }}', 'Hello Symfony', array('hello' => 'Hello %name%')),
-            array('{% set vars = { \'%name%\': \'Symfony\' } %}{{ hello|trans(vars) }}', 'Hello Symfony', array('hello' => 'Hello %name%')),
-            array('{{ "Hello"|trans({}, "messages", "fr") }}', 'Hello'),
+            ['{{ "Hello"|trans }}', 'Hello'],
+            ['{{ name|trans }}', 'Symfony', ['name' => 'Symfony']],
+            ['{{ hello|trans({ \'%name%\': \'Symfony\' }) }}', 'Hello Symfony', ['hello' => 'Hello %name%']],
+            ['{% set vars = { \'%name%\': \'Symfony\' } %}{{ hello|trans(vars) }}', 'Hello Symfony', ['hello' => 'Hello %name%']],
+            ['{{ "Hello"|trans({}, "messages", "fr") }}', 'Hello'],
 
             // transchoice filter
-            array('{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|transchoice(count) }}', 'There is 5 apples', array('count' => 5)),
-            array('{{ text|transchoice(5, {\'%name%\': \'Symfony\'}) }}', 'There is 5 apples (Symfony)', array('text' => '{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%)')),
-            array('{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|transchoice(count, {}, "messages", "fr") }}', 'There is 5 apples', array('count' => 5)),
-        );
+            ['{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|transchoice(count) }}', 'There is 5 apples', ['count' => 5]],
+            ['{{ text|transchoice(5, {\'%name%\': \'Symfony\'}) }}', 'There is 5 apples (Symfony)', ['text' => '{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples (%name%)']],
+            ['{{ "{0} There is no apples|{1} There is one apple|]1,Inf] There is %count% apples"|transchoice(count, {}, "messages", "fr") }}', 'There is 5 apples', ['count' => 5]],
+        ];
     }
 
     public function testDefaultTranslationDomain()
     {
-        $templates = array(
+        $templates = [
             'index' => '
                 {%- extends "base" %}
 
@@ -226,22 +226,22 @@ class TranslationExtensionTest extends TestCase
             'base' => '
                 {%- block content "" %}
             ',
-        );
+        ];
 
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (messages)'), 'en');
-        $translator->addResource('array', array('foo' => 'foo (custom)'), 'en', 'custom');
-        $translator->addResource('array', array('foo' => 'foo (foo)'), 'en', 'foo');
+        $translator->addResource('array', ['foo' => 'foo (messages)'], 'en');
+        $translator->addResource('array', ['foo' => 'foo (custom)'], 'en', 'custom');
+        $translator->addResource('array', ['foo' => 'foo (foo)'], 'en', 'foo');
 
         $template = $this->getTemplate($templates, $translator);
 
-        $this->assertEquals('foo (foo)foo (custom)foo (foo)foo (custom)foo (foo)foo (custom)', trim($template->render(array())));
+        $this->assertEquals('foo (foo)foo (custom)foo (foo)foo (custom)foo (foo)foo (custom)', trim($template->render([])));
     }
 
     public function testDefaultTranslationDomainWithNamedArguments()
     {
-        $templates = array(
+        $templates = [
             'index' => '
                 {%- trans_default_domain "foo" %}
 
@@ -259,18 +259,18 @@ class TranslationExtensionTest extends TestCase
             'base' => '
                 {%- block content "" %}
             ',
-        );
+        ];
 
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (messages)'), 'en');
-        $translator->addResource('array', array('foo' => 'foo (custom)'), 'en', 'custom');
-        $translator->addResource('array', array('foo' => 'foo (foo)'), 'en', 'foo');
-        $translator->addResource('array', array('foo' => 'foo (fr)'), 'fr', 'custom');
+        $translator->addResource('array', ['foo' => 'foo (messages)'], 'en');
+        $translator->addResource('array', ['foo' => 'foo (custom)'], 'en', 'custom');
+        $translator->addResource('array', ['foo' => 'foo (foo)'], 'en', 'foo');
+        $translator->addResource('array', ['foo' => 'foo (fr)'], 'fr', 'custom');
 
         $template = $this->getTemplate($templates, $translator);
 
-        $this->assertEquals('foo (custom)foo (foo)foo (custom)foo (custom)foo (fr)foo (custom)foo (fr)', trim($template->render(array())));
+        $this->assertEquals('foo (custom)foo (foo)foo (custom)foo (custom)foo (fr)foo (custom)foo (fr)', trim($template->render([])));
     }
 
     protected function getTemplate($template, $translator = null)
@@ -282,9 +282,9 @@ class TranslationExtensionTest extends TestCase
         if (\is_array($template)) {
             $loader = new TwigArrayLoader($template);
         } else {
-            $loader = new TwigArrayLoader(array('index' => $template));
+            $loader = new TwigArrayLoader(['index' => $template]);
         }
-        $twig = new Environment($loader, array('debug' => true, 'cache' => false));
+        $twig = new Environment($loader, ['debug' => true, 'cache' => false]);
         $twig->addExtension(new TranslationExtension($translator));
 
         return $twig->loadTemplate('index');
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/WebLinkExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/WebLinkExtensionTest.php
index 3424b58875..f49eea396d 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/WebLinkExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/WebLinkExtensionTest.php
@@ -44,49 +44,49 @@ class WebLinkExtensionTest extends TestCase
 
     public function testLink()
     {
-        $this->assertEquals('/foo.css', $this->extension->link('/foo.css', 'preload', array('as' => 'style', 'nopush' => true)));
+        $this->assertEquals('/foo.css', $this->extension->link('/foo.css', 'preload', ['as' => 'style', 'nopush' => true]));
 
         $link = (new Link('preload', '/foo.css'))->withAttribute('as', 'style')->withAttribute('nopush', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 
     public function testPreload()
     {
-        $this->assertEquals('/foo.css', $this->extension->preload('/foo.css', array('as' => 'style', 'crossorigin' => true)));
+        $this->assertEquals('/foo.css', $this->extension->preload('/foo.css', ['as' => 'style', 'crossorigin' => true]));
 
         $link = (new Link('preload', '/foo.css'))->withAttribute('as', 'style')->withAttribute('crossorigin', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 
     public function testDnsPrefetch()
     {
-        $this->assertEquals('/foo.css', $this->extension->dnsPrefetch('/foo.css', array('as' => 'style', 'crossorigin' => true)));
+        $this->assertEquals('/foo.css', $this->extension->dnsPrefetch('/foo.css', ['as' => 'style', 'crossorigin' => true]));
 
         $link = (new Link('dns-prefetch', '/foo.css'))->withAttribute('as', 'style')->withAttribute('crossorigin', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 
     public function testPreconnect()
     {
-        $this->assertEquals('/foo.css', $this->extension->preconnect('/foo.css', array('as' => 'style', 'crossorigin' => true)));
+        $this->assertEquals('/foo.css', $this->extension->preconnect('/foo.css', ['as' => 'style', 'crossorigin' => true]));
 
         $link = (new Link('preconnect', '/foo.css'))->withAttribute('as', 'style')->withAttribute('crossorigin', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 
     public function testPrefetch()
     {
-        $this->assertEquals('/foo.css', $this->extension->prefetch('/foo.css', array('as' => 'style', 'crossorigin' => true)));
+        $this->assertEquals('/foo.css', $this->extension->prefetch('/foo.css', ['as' => 'style', 'crossorigin' => true]));
 
         $link = (new Link('prefetch', '/foo.css'))->withAttribute('as', 'style')->withAttribute('crossorigin', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 
     public function testPrerender()
     {
-        $this->assertEquals('/foo.css', $this->extension->prerender('/foo.css', array('as' => 'style', 'crossorigin' => true)));
+        $this->assertEquals('/foo.css', $this->extension->prerender('/foo.css', ['as' => 'style', 'crossorigin' => true]));
 
         $link = (new Link('prerender', '/foo.css'))->withAttribute('as', 'style')->withAttribute('crossorigin', true);
-        $this->assertEquals(array($link), array_values($this->request->attributes->get('_links')->getLinks()));
+        $this->assertEquals([$link], array_values($this->request->attributes->get('_links')->getLinks()));
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/WorkflowExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/WorkflowExtensionTest.php
index aa0c2d49e5..a3e3ca2dae 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/WorkflowExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/WorkflowExtensionTest.php
@@ -32,19 +32,19 @@ class WorkflowExtensionTest extends TestCase
             $this->markTestSkipped('The Workflow component is needed to run tests for this extension.');
         }
 
-        $places = array('ordered', 'waiting_for_payment', 'processed');
-        $transitions = array(
+        $places = ['ordered', 'waiting_for_payment', 'processed'];
+        $transitions = [
             $this->t1 = new Transition('t1', 'ordered', 'waiting_for_payment'),
             new Transition('t2', 'waiting_for_payment', 'processed'),
-        );
+        ];
 
         $metadataStore = null;
         if (class_exists(InMemoryMetadataStore::class)) {
             $transitionsMetadata = new \SplObjectStorage();
-            $transitionsMetadata->attach($this->t1, array('title' => 't1 title'));
+            $transitionsMetadata->attach($this->t1, ['title' => 't1 title']);
             $metadataStore = new InMemoryMetadataStore(
-                array('title' => 'workflow title'),
-                array('orderer' => array('title' => 'ordered title')),
+                ['title' => 'workflow title'],
+                ['orderer' => ['title' => 'ordered title']],
                 $transitionsMetadata
             );
         }
@@ -63,7 +63,7 @@ class WorkflowExtensionTest extends TestCase
     public function testCanTransition()
     {
         $subject = new \stdClass();
-        $subject->marking = array();
+        $subject->marking = [];
 
         $this->assertTrue($this->extension->canTransition($subject, 't1'));
         $this->assertFalse($this->extension->canTransition($subject, 't2'));
@@ -72,7 +72,7 @@ class WorkflowExtensionTest extends TestCase
     public function testGetEnabledTransitions()
     {
         $subject = new \stdClass();
-        $subject->marking = array();
+        $subject->marking = [];
 
         $transitions = $this->extension->getEnabledTransitions($subject);
 
@@ -84,8 +84,8 @@ class WorkflowExtensionTest extends TestCase
     public function testHasMarkedPlace()
     {
         $subject = new \stdClass();
-        $subject->marking = array();
-        $subject->marking = array('ordered' => 1, 'waiting_for_payment' => 1);
+        $subject->marking = [];
+        $subject->marking = ['ordered' => 1, 'waiting_for_payment' => 1];
 
         $this->assertTrue($this->extension->hasMarkedPlace($subject, 'ordered'));
         $this->assertTrue($this->extension->hasMarkedPlace($subject, 'waiting_for_payment'));
@@ -95,10 +95,10 @@ class WorkflowExtensionTest extends TestCase
     public function testGetMarkedPlaces()
     {
         $subject = new \stdClass();
-        $subject->marking = array();
-        $subject->marking = array('ordered' => 1, 'waiting_for_payment' => 1);
+        $subject->marking = [];
+        $subject->marking = ['ordered' => 1, 'waiting_for_payment' => 1];
 
-        $this->assertSame(array('ordered', 'waiting_for_payment'), $this->extension->getMarkedPlaces($subject));
+        $this->assertSame(['ordered', 'waiting_for_payment'], $this->extension->getMarkedPlaces($subject));
         $this->assertSame($subject->marking, $this->extension->getMarkedPlaces($subject, false));
     }
 
@@ -108,7 +108,7 @@ class WorkflowExtensionTest extends TestCase
             $this->markTestSkipped('This test requires symfony/workflow:4.1.');
         }
         $subject = new \stdClass();
-        $subject->marking = array();
+        $subject->marking = [];
 
         $this->assertSame('workflow title', $this->extension->getMetadata($subject, 'title'));
         $this->assertSame('ordered title', $this->extension->getMetadata($subject, 'title', 'orderer'));
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
index 3075f34629..06c75fd0ec 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/DumpNodeTest.php
@@ -70,9 +70,9 @@ EOTXT;
 
     public function testOneVar()
     {
-        $vars = new Node(array(
+        $vars = new Node([
             new NameExpression('foo', 7),
-        ));
+        ]);
         $node = new DumpNode('bar', $vars, 7);
 
         $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock());
@@ -93,10 +93,10 @@ EOTXT;
 
     public function testMultiVars()
     {
-        $vars = new Node(array(
+        $vars = new Node([
             new NameExpression('foo', 7),
             new NameExpression('bar', 7),
-        ));
+        ]);
         $node = new DumpNode('bar', $vars, 7);
 
         $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock());
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
index e9a568d744..848685ee5f 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/FormThemeTest.php
@@ -30,10 +30,10 @@ class FormThemeTest extends TestCase
     public function testConstructor()
     {
         $form = new NameExpression('form', 0);
-        $resources = new Node(array(
+        $resources = new Node([
             new ConstantExpression('tpl1', 0),
             new ConstantExpression('tpl2', 0),
-        ));
+        ]);
 
         $node = new FormThemeNode($form, $resources, 0);
 
@@ -45,12 +45,12 @@ class FormThemeTest extends TestCase
     public function testCompile()
     {
         $form = new NameExpression('form', 0);
-        $resources = new ArrayExpression(array(
+        $resources = new ArrayExpression([
             new ConstantExpression(0, 0),
             new ConstantExpression('tpl1', 0),
             new ConstantExpression(1, 0),
             new ConstantExpression('tpl2', 0),
-        ), 0);
+        ], 0);
 
         $node = new FormThemeNode($form, $resources, 0);
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
index 9a86ffb9e8..fab7d0974c 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/SearchAndRenderBlockNodeTest.php
@@ -25,9 +25,9 @@ class SearchAndRenderBlockNodeTest extends TestCase
 {
     public function testCompileWidget()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_widget', $arguments, 0);
 
@@ -44,13 +44,13 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileWidgetWithVariables()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
-            new ArrayExpression(array(
+            new ArrayExpression([
                 new ConstantExpression('foo', 0),
                 new ConstantExpression('bar', 0),
-            ), 0),
-        ));
+            ], 0),
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_widget', $arguments, 0);
 
@@ -67,10 +67,10 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithLabel()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConstantExpression('my label', 0),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -87,10 +87,10 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithNullLabel()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConstantExpression(null, 0),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -109,10 +109,10 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithEmptyStringLabel()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConstantExpression('', 0),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -131,9 +131,9 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithDefaultLabel()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -150,14 +150,14 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithAttributes()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConstantExpression(null, 0),
-            new ArrayExpression(array(
+            new ArrayExpression([
                 new ConstantExpression('foo', 0),
                 new ConstantExpression('bar', 0),
-            ), 0),
-        ));
+            ], 0),
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -177,16 +177,16 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithLabelAndAttributes()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConstantExpression('value in argument', 0),
-            new ArrayExpression(array(
+            new ArrayExpression([
                 new ConstantExpression('foo', 0),
                 new ConstantExpression('bar', 0),
                 new ConstantExpression('label', 0),
                 new ConstantExpression('value in attributes', 0),
-            ), 0),
-        ));
+            ], 0),
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -203,7 +203,7 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithLabelThatEvaluatesToNull()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConditionalExpression(
                 // if
@@ -214,7 +214,7 @@ class SearchAndRenderBlockNodeTest extends TestCase
                 new ConstantExpression(null, 0),
                 0
             ),
-        ));
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
@@ -234,7 +234,7 @@ class SearchAndRenderBlockNodeTest extends TestCase
 
     public function testCompileLabelWithLabelThatEvaluatesToNullAndAttributes()
     {
-        $arguments = new Node(array(
+        $arguments = new Node([
             new NameExpression('form', 0),
             new ConditionalExpression(
                 // if
@@ -245,13 +245,13 @@ class SearchAndRenderBlockNodeTest extends TestCase
                 new ConstantExpression(null, 0),
                 0
             ),
-            new ArrayExpression(array(
+            new ArrayExpression([
                 new ConstantExpression('foo', 0),
                 new ConstantExpression('bar', 0),
                 new ConstantExpression('label', 0),
                 new ConstantExpression('value in attributes', 0),
-            ), 0),
-        ));
+            ], 0),
+        ]);
 
         $node = new SearchAndRenderBlockNode('form_label', $arguments, 0);
 
diff --git a/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php b/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
index bf093fbb09..6bb2ab6d43 100644
--- a/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Node/TransNodeTest.php
@@ -29,7 +29,7 @@ class TransNodeTest extends TestCase
         $vars = new NameExpression('foo', 0);
         $node = new TransNode($body, null, null, $vars);
 
-        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('strict_variables' => true));
+        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['strict_variables' => true]);
         $compiler = new Compiler($env);
 
         $this->assertEquals(
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
index eb4c9a83e8..5abfe1e92a 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationDefaultDomainNodeVisitorTest.php
@@ -26,7 +26,7 @@ class TranslationDefaultDomainNodeVisitorTest extends TestCase
     /** @dataProvider getDefaultDomainAssignmentTestData */
     public function testDefaultDomainAssignment(Node $node)
     {
-        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['cache' => false, 'autoescape' => false, 'optimizations' => 0]);
         $visitor = new TranslationDefaultDomainNodeVisitor();
 
         // visit trans_default_domain tag
@@ -46,13 +46,13 @@ class TranslationDefaultDomainNodeVisitorTest extends TestCase
         $visitor->enterNode($node, $env);
         $visitor->leaveNode($node, $env);
 
-        $this->assertEquals(array(array(self::$message, self::$domain)), $visitor->getMessages());
+        $this->assertEquals([[self::$message, self::$domain]], $visitor->getMessages());
     }
 
     /** @dataProvider getDefaultDomainAssignmentTestData */
     public function testNewModuleWithoutDefaultDomainTag(Node $node)
     {
-        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['cache' => false, 'autoescape' => false, 'optimizations' => 0]);
         $visitor = new TranslationDefaultDomainNodeVisitor();
 
         // visit trans_default_domain tag
@@ -72,22 +72,22 @@ class TranslationDefaultDomainNodeVisitorTest extends TestCase
         $visitor->enterNode($node, $env);
         $visitor->leaveNode($node, $env);
 
-        $this->assertEquals(array(array(self::$message, null)), $visitor->getMessages());
+        $this->assertEquals([[self::$message, null]], $visitor->getMessages());
     }
 
     public function getDefaultDomainAssignmentTestData()
     {
-        return array(
-            array(TwigNodeProvider::getTransFilter(self::$message)),
-            array(TwigNodeProvider::getTransChoiceFilter(self::$message)),
-            array(TwigNodeProvider::getTransTag(self::$message)),
+        return [
+            [TwigNodeProvider::getTransFilter(self::$message)],
+            [TwigNodeProvider::getTransChoiceFilter(self::$message)],
+            [TwigNodeProvider::getTransTag(self::$message)],
             // with named arguments
-            array(TwigNodeProvider::getTransFilter(self::$message, null, array(
-                'arguments' => new ArrayExpression(array(), 0),
-            ))),
-            array(TwigNodeProvider::getTransChoiceFilter(self::$message), null, array(
-                'arguments' => new ArrayExpression(array(), 0),
-            )),
-        );
+            [TwigNodeProvider::getTransFilter(self::$message, null, [
+                'arguments' => new ArrayExpression([], 0),
+            ])],
+            [TwigNodeProvider::getTransChoiceFilter(self::$message), null, [
+                'arguments' => new ArrayExpression([], 0),
+            ]],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
index 9c2d0ab9e4..11d16e4cd6 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TranslationNodeVisitorTest.php
@@ -25,7 +25,7 @@ class TranslationNodeVisitorTest extends TestCase
     /** @dataProvider getMessagesExtractionTestData */
     public function testMessagesExtraction(Node $node, array $expectedMessages)
     {
-        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['cache' => false, 'autoescape' => false, 'optimizations' => 0]);
         $visitor = new TranslationNodeVisitor();
         $visitor->enable();
         $visitor->enterNode($node, $env);
@@ -40,14 +40,14 @@ class TranslationNodeVisitorTest extends TestCase
         $node = new FilterExpression(
             new ConstantExpression($message, 0),
             new ConstantExpression('trans', 0),
-            new Node(array(
-                new ArrayExpression(array(), 0),
+            new Node([
+                new ArrayExpression([], 0),
                 new NameExpression('variable', 0),
-            )),
+            ]),
             0
         );
 
-        $this->testMessagesExtraction($node, array(array($message, TranslationNodeVisitor::UNDEFINED_DOMAIN)));
+        $this->testMessagesExtraction($node, [[$message, TranslationNodeVisitor::UNDEFINED_DOMAIN]]);
     }
 
     public function getMessagesExtractionTestData()
@@ -55,13 +55,13 @@ class TranslationNodeVisitorTest extends TestCase
         $message = 'new key';
         $domain = 'domain';
 
-        return array(
-            array(TwigNodeProvider::getTransFilter($message), array(array($message, null))),
-            array(TwigNodeProvider::getTransChoiceFilter($message), array(array($message, null))),
-            array(TwigNodeProvider::getTransTag($message), array(array($message, null))),
-            array(TwigNodeProvider::getTransFilter($message, $domain), array(array($message, $domain))),
-            array(TwigNodeProvider::getTransChoiceFilter($message, $domain), array(array($message, $domain))),
-            array(TwigNodeProvider::getTransTag($message, $domain), array(array($message, $domain))),
-        );
+        return [
+            [TwigNodeProvider::getTransFilter($message), [[$message, null]]],
+            [TwigNodeProvider::getTransChoiceFilter($message), [[$message, null]]],
+            [TwigNodeProvider::getTransTag($message), [[$message, null]]],
+            [TwigNodeProvider::getTransFilter($message, $domain), [[$message, $domain]]],
+            [TwigNodeProvider::getTransChoiceFilter($message, $domain), [[$message, $domain]]],
+            [TwigNodeProvider::getTransTag($message, $domain), [[$message, $domain]]],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TwigNodeProvider.php b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TwigNodeProvider.php
index 49eac23e8a..5147724675 100644
--- a/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TwigNodeProvider.php
+++ b/src/Symfony/Bridge/Twig/Tests/NodeVisitor/TwigNodeProvider.php
@@ -28,9 +28,9 @@ class TwigNodeProvider
         return new ModuleNode(
             new ConstantExpression($content, 0),
             null,
-            new ArrayExpression(array(), 0),
-            new ArrayExpression(array(), 0),
-            new ArrayExpression(array(), 0),
+            new ArrayExpression([], 0),
+            new ArrayExpression([], 0),
+            new ArrayExpression([], 0),
             null,
             new Source('', '')
         );
@@ -39,10 +39,10 @@ class TwigNodeProvider
     public static function getTransFilter($message, $domain = null, $arguments = null)
     {
         if (!$arguments) {
-            $arguments = $domain ? array(
-                new ArrayExpression(array(), 0),
+            $arguments = $domain ? [
+                new ArrayExpression([], 0),
                 new ConstantExpression($domain, 0),
-            ) : array();
+            ] : [];
         }
 
         return new FilterExpression(
@@ -56,11 +56,11 @@ class TwigNodeProvider
     public static function getTransChoiceFilter($message, $domain = null, $arguments = null)
     {
         if (!$arguments) {
-            $arguments = $domain ? array(
+            $arguments = $domain ? [
                 new ConstantExpression(0, 0),
-                new ArrayExpression(array(), 0),
+                new ArrayExpression([], 0),
                 new ConstantExpression($domain, 0),
-            ) : array();
+            ] : [];
         }
 
         return new FilterExpression(
@@ -74,7 +74,7 @@ class TwigNodeProvider
     public static function getTransTag($message, $domain = null)
     {
         return new TransNode(
-            new BodyNode(array(), array('data' => $message)),
+            new BodyNode([], ['data' => $message]),
             $domain ? new ConstantExpression($domain, 0) : null
         );
     }
diff --git a/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php b/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
index fc7af4f94d..572685a6c4 100644
--- a/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/TokenParser/FormThemeTokenParserTest.php
@@ -28,7 +28,7 @@ class FormThemeTokenParserTest extends TestCase
      */
     public function testCompile($source, $expected)
     {
-        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), array('cache' => false, 'autoescape' => false, 'optimizations' => 0));
+        $env = new Environment($this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock(), ['cache' => false, 'autoescape' => false, 'optimizations' => 0]);
         $env->addTokenParser(new FormThemeTokenParser());
         $stream = $env->tokenize(new Source($source, ''));
         $parser = new Parser($env);
@@ -38,34 +38,34 @@ class FormThemeTokenParserTest extends TestCase
 
     public function getTestsForFormTheme()
     {
-        return array(
-            array(
+        return [
+            [
                 '{% form_theme form "tpl1" %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
-                    new ArrayExpression(array(
+                    new ArrayExpression([
                         new ConstantExpression(0, 1),
                         new ConstantExpression('tpl1', 1),
-                    ), 1),
+                    ], 1),
                     1,
                     'form_theme'
                 ),
-            ),
-            array(
+            ],
+            [
                 '{% form_theme form "tpl1" "tpl2" %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
-                    new ArrayExpression(array(
+                    new ArrayExpression([
                         new ConstantExpression(0, 1),
                         new ConstantExpression('tpl1', 1),
                         new ConstantExpression(1, 1),
                         new ConstantExpression('tpl2', 1),
-                    ), 1),
+                    ], 1),
                     1,
                     'form_theme'
                 ),
-            ),
-            array(
+            ],
+            [
                 '{% form_theme form with "tpl1" %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
@@ -73,48 +73,48 @@ class FormThemeTokenParserTest extends TestCase
                     1,
                     'form_theme'
                 ),
-            ),
-            array(
+            ],
+            [
                 '{% form_theme form with ["tpl1"] %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
-                    new ArrayExpression(array(
+                    new ArrayExpression([
                         new ConstantExpression(0, 1),
                         new ConstantExpression('tpl1', 1),
-                    ), 1),
+                    ], 1),
                     1,
                     'form_theme'
                 ),
-            ),
-            array(
+            ],
+            [
                 '{% form_theme form with ["tpl1", "tpl2"] %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
-                    new ArrayExpression(array(
+                    new ArrayExpression([
                         new ConstantExpression(0, 1),
                         new ConstantExpression('tpl1', 1),
                         new ConstantExpression(1, 1),
                         new ConstantExpression('tpl2', 1),
-                    ), 1),
+                    ], 1),
                     1,
                     'form_theme'
                 ),
-            ),
-            array(
+            ],
+            [
                 '{% form_theme form with ["tpl1", "tpl2"] only %}',
                 new FormThemeNode(
                     new NameExpression('form', 1),
-                    new ArrayExpression(array(
+                    new ArrayExpression([
                         new ConstantExpression(0, 1),
                         new ConstantExpression('tpl1', 1),
                         new ConstantExpression(1, 1),
                         new ConstantExpression('tpl2', 1),
-                    ), 1),
+                    ], 1),
                     1,
                     'form_theme',
                     true
                 ),
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
index fca5f4d4a9..1f5c1955c7 100644
--- a/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Translation/TwigExtractorTest.php
@@ -28,12 +28,12 @@ class TwigExtractorTest extends TestCase
     public function testExtract($template, $messages)
     {
         $loader = $this->getMockBuilder('Twig\Loader\LoaderInterface')->getMock();
-        $twig = new Environment($loader, array(
+        $twig = new Environment($loader, [
             'strict_variables' => true,
             'debug' => true,
             'cache' => false,
             'autoescape' => false,
-        ));
+        ]);
         $twig->addExtension(new TranslationExtension($this->getMockBuilder(TranslatorInterface::class)->getMock()));
 
         $extractor = new TwigExtractor($twig);
@@ -61,23 +61,23 @@ class TwigExtractorTest extends TestCase
 
     public function getExtractData()
     {
-        return array(
-            array('{{ "new key" | trans() }}', array('new key' => 'messages')),
-            array('{{ "new key" | trans() | upper }}', array('new key' => 'messages')),
-            array('{{ "new key" | trans({}, "domain") }}', array('new key' => 'domain')),
-            array('{% trans %}new key{% endtrans %}', array('new key' => 'messages')),
-            array('{% trans %}  new key  {% endtrans %}', array('new key' => 'messages')),
-            array('{% trans from "domain" %}new key{% endtrans %}', array('new key' => 'domain')),
-            array('{% set foo = "new key" | trans %}', array('new key' => 'messages')),
-            array('{{ 1 ? "new key" | trans : "another key" | trans }}', array('new key' => 'messages', 'another key' => 'messages')),
+        return [
+            ['{{ "new key" | trans() }}', ['new key' => 'messages']],
+            ['{{ "new key" | trans() | upper }}', ['new key' => 'messages']],
+            ['{{ "new key" | trans({}, "domain") }}', ['new key' => 'domain']],
+            ['{% trans %}new key{% endtrans %}', ['new key' => 'messages']],
+            ['{% trans %}  new key  {% endtrans %}', ['new key' => 'messages']],
+            ['{% trans from "domain" %}new key{% endtrans %}', ['new key' => 'domain']],
+            ['{% set foo = "new key" | trans %}', ['new key' => 'messages']],
+            ['{{ 1 ? "new key" | trans : "another key" | trans }}', ['new key' => 'messages', 'another key' => 'messages']],
 
             // make sure 'trans_default_domain' tag is supported
-            array('{% trans_default_domain "domain" %}{{ "new key"|trans }}', array('new key' => 'domain')),
-            array('{% trans_default_domain "domain" %}{% trans %}new key{% endtrans %}', array('new key' => 'domain')),
+            ['{% trans_default_domain "domain" %}{{ "new key"|trans }}', ['new key' => 'domain']],
+            ['{% trans_default_domain "domain" %}{% trans %}new key{% endtrans %}', ['new key' => 'domain']],
 
             // make sure this works with twig's named arguments
-            array('{{ "new key" | trans(domain="domain") }}', array('new key' => 'domain')),
-        );
+            ['{{ "new key" | trans(domain="domain") }}', ['new key' => 'domain']],
+        ];
     }
 
     /**
@@ -85,17 +85,17 @@ class TwigExtractorTest extends TestCase
      */
     public function getLegacyExtractData()
     {
-        return array(
-            array('{{ "new key" | transchoice(1) }}', array('new key' => 'messages')),
-            array('{{ "new key" | transchoice(1) | upper }}', array('new key' => 'messages')),
-            array('{{ "new key" | transchoice(1, {}, "domain") }}', array('new key' => 'domain')),
+        return [
+            ['{{ "new key" | transchoice(1) }}', ['new key' => 'messages']],
+            ['{{ "new key" | transchoice(1) | upper }}', ['new key' => 'messages']],
+            ['{{ "new key" | transchoice(1, {}, "domain") }}', ['new key' => 'domain']],
 
             // make sure 'trans_default_domain' tag is supported
-            array('{% trans_default_domain "domain" %}{{ "new key"|transchoice }}', array('new key' => 'domain')),
+            ['{% trans_default_domain "domain" %}{{ "new key"|transchoice }}', ['new key' => 'domain']],
 
             // make sure this works with twig's named arguments
-            array('{{ "new key" | transchoice(domain="domain", count=1) }}', array('new key' => 'domain')),
-        );
+            ['{{ "new key" | transchoice(domain="domain", count=1) }}', ['new key' => 'domain']],
+        ];
     }
 
     /**
@@ -128,11 +128,11 @@ class TwigExtractorTest extends TestCase
      */
     public function resourcesWithSyntaxErrorsProvider()
     {
-        return array(
-            array(__DIR__.'/../Fixtures'),
-            array(__DIR__.'/../Fixtures/extractor/syntax_error.twig'),
-            array(new \SplFileInfo(__DIR__.'/../Fixtures/extractor/syntax_error.twig')),
-        );
+        return [
+            [__DIR__.'/../Fixtures'],
+            [__DIR__.'/../Fixtures/extractor/syntax_error.twig'],
+            [new \SplFileInfo(__DIR__.'/../Fixtures/extractor/syntax_error.twig')],
+        ];
     }
 
     /**
@@ -140,13 +140,13 @@ class TwigExtractorTest extends TestCase
      */
     public function testExtractWithFiles($resource)
     {
-        $loader = new ArrayLoader(array());
-        $twig = new Environment($loader, array(
+        $loader = new ArrayLoader([]);
+        $twig = new Environment($loader, [
             'strict_variables' => true,
             'debug' => true,
             'cache' => false,
             'autoescape' => false,
-        ));
+        ]);
         $twig->addExtension(new TranslationExtension($this->getMockBuilder(TranslatorInterface::class)->getMock()));
 
         $extractor = new TwigExtractor($twig);
@@ -164,12 +164,12 @@ class TwigExtractorTest extends TestCase
     {
         $directory = __DIR__.'/../Fixtures/extractor/';
 
-        return array(
-            array($directory.'with_translations.html.twig'),
-            array(array($directory.'with_translations.html.twig')),
-            array(array(new \SplFileInfo($directory.'with_translations.html.twig'))),
-            array(new \ArrayObject(array($directory.'with_translations.html.twig'))),
-            array(new \ArrayObject(array(new \SplFileInfo($directory.'with_translations.html.twig')))),
-        );
+        return [
+            [$directory.'with_translations.html.twig'],
+            [[$directory.'with_translations.html.twig']],
+            [[new \SplFileInfo($directory.'with_translations.html.twig')]],
+            [new \ArrayObject([$directory.'with_translations.html.twig'])],
+            [new \ArrayObject([new \SplFileInfo($directory.'with_translations.html.twig')])],
+        ];
     }
 }
diff --git a/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php b/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
index a74c59e8d2..ab932eebc3 100644
--- a/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/TwigEngineTest.php
@@ -23,7 +23,7 @@ class TwigEngineTest extends TestCase
     {
         $engine = $this->getTwig();
 
-        $this->assertTrue($engine->exists($this->getMockForAbstractClass('Twig\Template', array(), '', false)));
+        $this->assertTrue($engine->exists($this->getMockForAbstractClass('Twig\Template', [], '', false)));
     }
 
     public function testExistsWithNonExistentTemplates()
@@ -70,10 +70,10 @@ class TwigEngineTest extends TestCase
 
     protected function getTwig()
     {
-        $twig = new Environment(new ArrayLoader(array(
+        $twig = new Environment(new ArrayLoader([
             'index' => 'foo',
             'error' => '{{ foo }',
-        )));
+        ]));
         $parser = $this->getMockBuilder('Symfony\Component\Templating\TemplateNameParserInterface')->getMock();
 
         return new TwigEngine($twig, $parser);
diff --git a/src/Symfony/Bridge/Twig/TokenParser/FormThemeTokenParser.php b/src/Symfony/Bridge/Twig/TokenParser/FormThemeTokenParser.php
index 2388cc5662..ffef9e9859 100644
--- a/src/Symfony/Bridge/Twig/TokenParser/FormThemeTokenParser.php
+++ b/src/Symfony/Bridge/Twig/TokenParser/FormThemeTokenParser.php
@@ -45,7 +45,7 @@ class FormThemeTokenParser extends AbstractTokenParser
                 $only = true;
             }
         } else {
-            $resources = new ArrayExpression(array(), $stream->getCurrent()->getLine());
+            $resources = new ArrayExpression([], $stream->getCurrent()->getLine());
             do {
                 $resources->addElement($this->parser->getExpressionParser()->parseExpression());
             } while (!$stream->test(Token::BLOCK_END_TYPE));
diff --git a/src/Symfony/Bridge/Twig/TokenParser/StopwatchTokenParser.php b/src/Symfony/Bridge/Twig/TokenParser/StopwatchTokenParser.php
index dd78175d21..54dcf6d391 100644
--- a/src/Symfony/Bridge/Twig/TokenParser/StopwatchTokenParser.php
+++ b/src/Symfony/Bridge/Twig/TokenParser/StopwatchTokenParser.php
@@ -41,7 +41,7 @@ class StopwatchTokenParser extends AbstractTokenParser
         $stream->expect(Token::BLOCK_END_TYPE);
 
         // {% endstopwatch %}
-        $body = $this->parser->subparse(array($this, 'decideStopwatchEnd'), true);
+        $body = $this->parser->subparse([$this, 'decideStopwatchEnd'], true);
         $stream->expect(Token::BLOCK_END_TYPE);
 
         if ($this->stopwatchIsAvailable) {
diff --git a/src/Symfony/Bridge/Twig/TokenParser/TransChoiceTokenParser.php b/src/Symfony/Bridge/Twig/TokenParser/TransChoiceTokenParser.php
index 84e13f1efb..08b44b27b8 100644
--- a/src/Symfony/Bridge/Twig/TokenParser/TransChoiceTokenParser.php
+++ b/src/Symfony/Bridge/Twig/TokenParser/TransChoiceTokenParser.php
@@ -42,7 +42,7 @@ class TransChoiceTokenParser extends TransTokenParser
 
         @trigger_error(sprintf('The "transchoice" tag is deprecated since Symfony 4.2, use the "trans" one instead with a "%%count%%" parameter in %s line %d.', $stream->getSourceContext()->getName(), $lineno), E_USER_DEPRECATED);
 
-        $vars = new ArrayExpression(array(), $lineno);
+        $vars = new ArrayExpression([], $lineno);
 
         $count = $this->parser->getExpressionParser()->parseExpression();
 
@@ -69,7 +69,7 @@ class TransChoiceTokenParser extends TransTokenParser
 
         $stream->expect(Token::BLOCK_END_TYPE);
 
-        $body = $this->parser->subparse(array($this, 'decideTransChoiceFork'), true);
+        $body = $this->parser->subparse([$this, 'decideTransChoiceFork'], true);
 
         if (!$body instanceof TextNode && !$body instanceof AbstractExpression) {
             throw new SyntaxError('A message inside a transchoice tag must be a simple text.', $body->getTemplateLine(), $stream->getSourceContext());
@@ -82,7 +82,7 @@ class TransChoiceTokenParser extends TransTokenParser
 
     public function decideTransChoiceFork($token)
     {
-        return $token->test(array('endtranschoice'));
+        return $token->test(['endtranschoice']);
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php b/src/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php
index 3a485383ec..023e3dbf43 100644
--- a/src/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php
+++ b/src/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php
@@ -40,7 +40,7 @@ class TransTokenParser extends AbstractTokenParser
         $stream = $this->parser->getStream();
 
         $count = null;
-        $vars = new ArrayExpression(array(), $lineno);
+        $vars = new ArrayExpression([], $lineno);
         $domain = null;
         $locale = null;
         if (!$stream->test(Token::BLOCK_END_TYPE)) {
@@ -73,7 +73,7 @@ class TransTokenParser extends AbstractTokenParser
 
         // {% trans %}message{% endtrans %}
         $stream->expect(Token::BLOCK_END_TYPE);
-        $body = $this->parser->subparse(array($this, 'decideTransFork'), true);
+        $body = $this->parser->subparse([$this, 'decideTransFork'], true);
 
         if (!$body instanceof TextNode && !$body instanceof AbstractExpression) {
             throw new SyntaxError('A message inside a trans tag must be a simple text.', $body->getTemplateLine(), $stream->getSourceContext());
@@ -86,7 +86,7 @@ class TransTokenParser extends AbstractTokenParser
 
     public function decideTransFork($token)
     {
-        return $token->test(array('endtrans'));
+        return $token->test(['endtrans']);
     }
 
     /**
diff --git a/src/Symfony/Bridge/Twig/TwigEngine.php b/src/Symfony/Bridge/Twig/TwigEngine.php
index bc0a4fecc9..4789f3f4d6 100644
--- a/src/Symfony/Bridge/Twig/TwigEngine.php
+++ b/src/Symfony/Bridge/Twig/TwigEngine.php
@@ -44,7 +44,7 @@ class TwigEngine implements EngineInterface, StreamingEngineInterface
      *
      * @throws Error if something went wrong like a thrown exception while rendering the template
      */
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
         return $this->load($name)->render($parameters);
     }
@@ -56,7 +56,7 @@ class TwigEngine implements EngineInterface, StreamingEngineInterface
      *
      * @throws Error if something went wrong like a thrown exception while rendering the template
      */
-    public function stream($name, array $parameters = array())
+    public function stream($name, array $parameters = [])
     {
         $this->load($name)->display($parameters);
     }
diff --git a/src/Symfony/Bridge/Twig/UndefinedCallableHandler.php b/src/Symfony/Bridge/Twig/UndefinedCallableHandler.php
index 78b0ab16ea..ff88c69852 100644
--- a/src/Symfony/Bridge/Twig/UndefinedCallableHandler.php
+++ b/src/Symfony/Bridge/Twig/UndefinedCallableHandler.php
@@ -19,15 +19,15 @@ use Twig\Error\SyntaxError;
  */
 class UndefinedCallableHandler
 {
-    private static $filterComponents = array(
+    private static $filterComponents = [
         'humanize' => 'form',
         'trans' => 'translation',
         'transchoice' => 'translation',
         'yaml_encode' => 'yaml',
         'yaml_dump' => 'yaml',
-    );
+    ];
 
-    private static $functionComponents = array(
+    private static $functionComponents = [
         'asset' => 'asset',
         'asset_version' => 'asset',
         'dump' => 'debug-bundle',
@@ -55,15 +55,15 @@ class UndefinedCallableHandler
         'workflow_transitions' => 'workflow',
         'workflow_has_marked_place' => 'workflow',
         'workflow_marked_places' => 'workflow',
-    );
+    ];
 
-    private static $fullStackEnable = array(
+    private static $fullStackEnable = [
         'form' => 'enable "framework.form"',
         'security-core' => 'add the "SecurityBundle"',
         'security-http' => 'add the "SecurityBundle"',
         'web-link' => 'enable "framework.web_link"',
         'workflow' => 'enable "framework.workflows"',
-    );
+    ];
 
     public static function onUndefinedFilter($name)
     {
diff --git a/src/Symfony/Bundle/DebugBundle/Command/ServerDumpPlaceholderCommand.php b/src/Symfony/Bundle/DebugBundle/Command/ServerDumpPlaceholderCommand.php
index d41b16afad..ae69edfff7 100644
--- a/src/Symfony/Bundle/DebugBundle/Command/ServerDumpPlaceholderCommand.php
+++ b/src/Symfony/Bundle/DebugBundle/Command/ServerDumpPlaceholderCommand.php
@@ -29,7 +29,7 @@ class ServerDumpPlaceholderCommand extends Command
 {
     private $replacedCommand;
 
-    public function __construct(DumpServer $server = null, array $descriptors = array())
+    public function __construct(DumpServer $server = null, array $descriptors = [])
     {
         $this->replacedCommand = new ServerDumpCommand((new \ReflectionClass(DumpServer::class))->newInstanceWithoutConstructor(), $descriptors);
 
diff --git a/src/Symfony/Bundle/DebugBundle/DependencyInjection/DebugExtension.php b/src/Symfony/Bundle/DebugBundle/DependencyInjection/DebugExtension.php
index 968fa81f75..da07d97051 100644
--- a/src/Symfony/Bundle/DebugBundle/DependencyInjection/DebugExtension.php
+++ b/src/Symfony/Bundle/DebugBundle/DependencyInjection/DebugExtension.php
@@ -39,9 +39,9 @@ class DebugExtension extends Extension
         $loader->load('services.xml');
 
         $container->getDefinition('var_dumper.cloner')
-            ->addMethodCall('setMaxItems', array($config['max_items']))
-            ->addMethodCall('setMinDepth', array($config['min_depth']))
-            ->addMethodCall('setMaxString', array($config['max_string_length']));
+            ->addMethodCall('setMaxItems', [$config['max_items']])
+            ->addMethodCall('setMinDepth', [$config['min_depth']])
+            ->addMethodCall('setMaxString', [$config['max_string_length']]);
 
         if (method_exists(HtmlDumper::class, 'setTheme') && 'dark' !== $config['theme']) {
             $container->getDefinition('var_dumper.html_dumper')
diff --git a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
index 6f49c02126..0b518ee00f 100644
--- a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
+++ b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/Compiler/DumpDataCollectorPassTest.php
@@ -25,7 +25,7 @@ class DumpDataCollectorPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->addCompilerPass(new DumpDataCollectorPass());
 
-        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', array(null, null, null, null));
+        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', [null, null, null, null]);
         $container->setDefinition('data_collector.dump', $definition);
 
         $container->compile();
@@ -39,7 +39,7 @@ class DumpDataCollectorPassTest extends TestCase
         $container->addCompilerPass(new DumpDataCollectorPass());
         $requestStack = new RequestStack();
 
-        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', array(null, null, null, $requestStack));
+        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', [null, null, null, $requestStack]);
         $container->setDefinition('data_collector.dump', $definition);
         $container->setParameter('web_profiler.debug_toolbar.mode', WebDebugToolbarListener::ENABLED);
 
@@ -53,7 +53,7 @@ class DumpDataCollectorPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->addCompilerPass(new DumpDataCollectorPass());
 
-        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', array(null, null, null, new RequestStack()));
+        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', [null, null, null, new RequestStack()]);
         $container->setDefinition('data_collector.dump', $definition);
         $container->setParameter('web_profiler.debug_toolbar.mode', WebDebugToolbarListener::DISABLED);
 
@@ -67,7 +67,7 @@ class DumpDataCollectorPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->addCompilerPass(new DumpDataCollectorPass());
 
-        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', array(null, null, null, new RequestStack()));
+        $definition = new Definition('Symfony\Component\HttpKernel\DataCollector\DumpDataCollector', [null, null, null, new RequestStack()]);
         $container->setDefinition('data_collector.dump', $definition);
 
         $container->compile();
diff --git a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
index 0c285a02ac..cd6084c5e3 100644
--- a/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
+++ b/src/Symfony/Bundle/DebugBundle/Tests/DependencyInjection/DebugExtensionTest.php
@@ -22,36 +22,36 @@ class DebugExtensionTest extends TestCase
     {
         $container = $this->createContainer();
         $container->registerExtension(new DebugExtension());
-        $container->loadFromExtension('debug', array());
+        $container->loadFromExtension('debug', []);
         $this->compileContainer($container);
 
-        $expectedTags = array(
-            array(
+        $expectedTags = [
+            [
                 'id' => 'dump',
                 'template' => '@Debug/Profiler/dump.html.twig',
                 'priority' => 240,
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($expectedTags, $container->getDefinition('data_collector.dump')->getTag('data_collector'));
     }
 
     private function createContainer()
     {
-        $container = new ContainerBuilder(new ParameterBag(array(
+        $container = new ContainerBuilder(new ParameterBag([
             'kernel.cache_dir' => __DIR__,
             'kernel.charset' => 'UTF-8',
             'kernel.debug' => true,
-            'kernel.bundles' => array('DebugBundle' => 'Symfony\\Bundle\\DebugBundle\\DebugBundle'),
-        )));
+            'kernel.bundles' => ['DebugBundle' => 'Symfony\\Bundle\\DebugBundle\\DebugBundle'],
+        ]));
 
         return $container;
     }
 
     private function compileContainer(ContainerBuilder $container)
     {
-        $container->getCompilerPassConfig()->setOptimizationPasses(array());
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
         $container->compile();
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AbstractPhpFileCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AbstractPhpFileCacheWarmer.php
index 9625d6fa4d..e593002e22 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AbstractPhpFileCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/AbstractPhpFileCacheWarmer.php
@@ -46,13 +46,13 @@ abstract class AbstractPhpFileCacheWarmer implements CacheWarmerInterface
     {
         $arrayAdapter = new ArrayAdapter();
 
-        spl_autoload_register(array(PhpArrayAdapter::class, 'throwOnRequiredClass'));
+        spl_autoload_register([PhpArrayAdapter::class, 'throwOnRequiredClass']);
         try {
             if (!$this->doWarmUp($cacheDir, $arrayAdapter)) {
                 return;
             }
         } finally {
-            spl_autoload_unregister(array(PhpArrayAdapter::class, 'throwOnRequiredClass'));
+            spl_autoload_unregister([PhpArrayAdapter::class, 'throwOnRequiredClass']);
         }
 
         // the ArrayAdapter stores the values serialized
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/RouterCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/RouterCacheWarmer.php
index e5ba4fd99b..7e6f4e5c2f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/RouterCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/RouterCacheWarmer.php
@@ -67,8 +67,8 @@ class RouterCacheWarmer implements CacheWarmerInterface, ServiceSubscriberInterf
      */
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'router' => RouterInterface::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
index 9d752aa21e..535161b119 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/SerializerCacheWarmer.php
@@ -76,7 +76,7 @@ class SerializerCacheWarmer extends AbstractPhpFileCacheWarmer
      */
     private function extractSupportedLoaders(array $loaders)
     {
-        $supportedLoaders = array();
+        $supportedLoaders = [];
 
         foreach ($loaders as $loader) {
             if ($loader instanceof XmlFileLoader || $loader instanceof YamlFileLoader) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplateFinder.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplateFinder.php
index eaad0f1894..27c103e26c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplateFinder.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplateFinder.php
@@ -52,7 +52,7 @@ class TemplateFinder implements TemplateFinderInterface
             return $this->templates;
         }
 
-        $templates = array();
+        $templates = [];
 
         foreach ($this->kernel->getBundles() as $bundle) {
             $templates = array_merge($templates, $this->findTemplatesInBundle($bundle));
@@ -72,7 +72,7 @@ class TemplateFinder implements TemplateFinderInterface
      */
     private function findTemplatesInFolder($dir)
     {
-        $templates = array();
+        $templates = [];
 
         if (is_dir($dir)) {
             $finder = new Finder();
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplatePathsCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplatePathsCacheWarmer.php
index 523d7ecce0..6662a1808d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplatePathsCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TemplatePathsCacheWarmer.php
@@ -39,7 +39,7 @@ class TemplatePathsCacheWarmer extends CacheWarmer
     public function warmUp($cacheDir)
     {
         $filesystem = new Filesystem();
-        $templates = array();
+        $templates = [];
 
         foreach ($this->finder->findAllTemplates() as $template) {
             $templates[$template->getLogicalName()] = rtrim($filesystem->makePathRelative($this->locator->locate($template), $cacheDir), '/');
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TranslationsCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TranslationsCacheWarmer.php
index 98f2ffdee3..c1dde79976 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TranslationsCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/TranslationsCacheWarmer.php
@@ -60,8 +60,8 @@ class TranslationsCacheWarmer implements CacheWarmerInterface, ServiceSubscriber
      */
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'translator' => TranslatorInterface::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
index 3779fd9a69..d617f7df9d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/ValidatorCacheWarmer.php
@@ -86,7 +86,7 @@ class ValidatorCacheWarmer extends AbstractPhpFileCacheWarmer
      */
     private function extractSupportedLoaders(array $loaders)
     {
-        $supportedLoaders = array();
+        $supportedLoaders = [];
 
         foreach ($loaders as $loader) {
             if ($loader instanceof XmlFileLoader || $loader instanceof YamlFileLoader) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Client.php b/src/Symfony/Bundle/FrameworkBundle/Client.php
index c86a2772eb..6473f97584 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Client.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Client.php
@@ -34,7 +34,7 @@ class Client extends BaseClient
     /**
      * {@inheritdoc}
      */
-    public function __construct(KernelInterface $kernel, array $server = array(), History $history = null, CookieJar $cookieJar = null)
+    public function __construct(KernelInterface $kernel, array $server = [], History $history = null, CookieJar $cookieJar = null)
     {
         parent::__construct($kernel, $server, $history, $cookieJar);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AboutCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AboutCommand.php
index d781f2a7e7..3c5b15fb7e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AboutCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AboutCommand.php
@@ -61,44 +61,44 @@ EOT
         /** @var KernelInterface $kernel */
         $kernel = $this->getApplication()->getKernel();
 
-        $rows = array(
-            array('<info>Symfony</>'),
+        $rows = [
+            ['<info>Symfony</>'],
             new TableSeparator(),
-            array('Version', Kernel::VERSION),
-            array('End of maintenance', Kernel::END_OF_MAINTENANCE.(self::isExpired(Kernel::END_OF_MAINTENANCE) ? ' <error>Expired</>' : '')),
-            array('End of life', Kernel::END_OF_LIFE.(self::isExpired(Kernel::END_OF_LIFE) ? ' <error>Expired</>' : '')),
+            ['Version', Kernel::VERSION],
+            ['End of maintenance', Kernel::END_OF_MAINTENANCE.(self::isExpired(Kernel::END_OF_MAINTENANCE) ? ' <error>Expired</>' : '')],
+            ['End of life', Kernel::END_OF_LIFE.(self::isExpired(Kernel::END_OF_LIFE) ? ' <error>Expired</>' : '')],
             new TableSeparator(),
-            array('<info>Kernel</>'),
+            ['<info>Kernel</>'],
             new TableSeparator(),
-            array('Type', \get_class($kernel)),
-            array('Environment', $kernel->getEnvironment()),
-            array('Debug', $kernel->isDebug() ? 'true' : 'false'),
-            array('Charset', $kernel->getCharset()),
-            array('Cache directory', self::formatPath($kernel->getCacheDir(), $kernel->getProjectDir()).' (<comment>'.self::formatFileSize($kernel->getCacheDir()).'</>)'),
-            array('Log directory', self::formatPath($kernel->getLogDir(), $kernel->getProjectDir()).' (<comment>'.self::formatFileSize($kernel->getLogDir()).'</>)'),
+            ['Type', \get_class($kernel)],
+            ['Environment', $kernel->getEnvironment()],
+            ['Debug', $kernel->isDebug() ? 'true' : 'false'],
+            ['Charset', $kernel->getCharset()],
+            ['Cache directory', self::formatPath($kernel->getCacheDir(), $kernel->getProjectDir()).' (<comment>'.self::formatFileSize($kernel->getCacheDir()).'</>)'],
+            ['Log directory', self::formatPath($kernel->getLogDir(), $kernel->getProjectDir()).' (<comment>'.self::formatFileSize($kernel->getLogDir()).'</>)'],
             new TableSeparator(),
-            array('<info>PHP</>'),
+            ['<info>PHP</>'],
             new TableSeparator(),
-            array('Version', PHP_VERSION),
-            array('Architecture', (PHP_INT_SIZE * 8).' bits'),
-            array('Intl locale', class_exists('Locale', false) && \Locale::getDefault() ? \Locale::getDefault() : 'n/a'),
-            array('Timezone', date_default_timezone_get().' (<comment>'.(new \DateTime())->format(\DateTime::W3C).'</>)'),
-            array('OPcache', \extension_loaded('Zend OPcache') && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false'),
-            array('APCu', \extension_loaded('apcu') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false'),
-            array('Xdebug', \extension_loaded('xdebug') ? 'true' : 'false'),
-        );
+            ['Version', PHP_VERSION],
+            ['Architecture', (PHP_INT_SIZE * 8).' bits'],
+            ['Intl locale', class_exists('Locale', false) && \Locale::getDefault() ? \Locale::getDefault() : 'n/a'],
+            ['Timezone', date_default_timezone_get().' (<comment>'.(new \DateTime())->format(\DateTime::W3C).'</>)'],
+            ['OPcache', \extension_loaded('Zend OPcache') && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false'],
+            ['APCu', \extension_loaded('apcu') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? 'true' : 'false'],
+            ['Xdebug', \extension_loaded('xdebug') ? 'true' : 'false'],
+        ];
 
         if ($dotenv = self::getDotenvVars()) {
-            $rows = array_merge($rows, array(
+            $rows = array_merge($rows, [
                 new TableSeparator(),
-                array('<info>Environment (.env)</>'),
+                ['<info>Environment (.env)</>'],
                 new TableSeparator(),
-            ), array_map(function ($value, $name) {
-                return array($name, $value);
+            ], array_map(function ($value, $name) {
+                return [$name, $value];
             }, $dotenv, array_keys($dotenv)));
         }
 
-        $io->table(array(), $rows);
+        $io->table([], $rows);
     }
 
     private static function formatPath(string $path, string $baseDir): string
@@ -129,7 +129,7 @@ EOT
 
     private static function getDotenvVars(): array
     {
-        $vars = array();
+        $vars = [];
         foreach (explode(',', getenv('SYMFONY_DOTENV_VARS')) as $name) {
             if ('' !== $name && false !== $value = getenv($name)) {
                 $vars[$name] = $value;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
index 6d8960cd03..cc1b858abb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
@@ -29,8 +29,8 @@ abstract class AbstractConfigCommand extends ContainerDebugCommand
     protected function listBundles($output)
     {
         $title = 'Available registered bundles with their extension alias if available';
-        $headers = array('Bundle name', 'Extension alias');
-        $rows = array();
+        $headers = ['Bundle name', 'Extension alias'];
+        $rows = [];
 
         $bundles = $this->getApplication()->getKernel()->getBundles();
         usort($bundles, function ($bundleA, $bundleB) {
@@ -39,7 +39,7 @@ abstract class AbstractConfigCommand extends ContainerDebugCommand
 
         foreach ($bundles as $bundle) {
             $extension = $bundle->getContainerExtension();
-            $rows[] = array($bundle->getName(), $extension ? $extension->getAlias() : '');
+            $rows[] = [$bundle->getName(), $extension ? $extension->getAlias() : ''];
         }
 
         if ($output instanceof StyleInterface) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
index 8a6f7290a9..5d20431c95 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AssetsInstallCommand.php
@@ -62,9 +62,9 @@ class AssetsInstallCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('target', InputArgument::OPTIONAL, 'The target directory', null),
-            ))
+            ])
             ->addOption('symlink', null, InputOption::VALUE_NONE, 'Symlinks the assets instead of copying it')
             ->addOption('relative', null, InputOption::VALUE_NONE, 'Make relative symlinks')
             ->addOption('no-cleanup', null, InputOption::VALUE_NONE, 'Do not remove the assets of the bundles that no longer exist')
@@ -131,10 +131,10 @@ EOT
 
         $io->newLine();
 
-        $rows = array();
+        $rows = [];
         $copyUsed = false;
         $exitCode = 0;
-        $validAssetDirs = array();
+        $validAssetDirs = [];
         /** @var BundleInterface $bundle */
         foreach ($kernel->getBundles() as $bundle) {
             if (!is_dir($originDir = $bundle->getPath().'/Resources/public')) {
@@ -167,13 +167,13 @@ EOT
                 }
 
                 if ($method === $expectedMethod) {
-                    $rows[] = array(sprintf('<fg=green;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'OK' : "\xE2\x9C\x94" /* HEAVY CHECK MARK (U+2714) */), $message, $method);
+                    $rows[] = [sprintf('<fg=green;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'OK' : "\xE2\x9C\x94" /* HEAVY CHECK MARK (U+2714) */), $message, $method];
                 } else {
-                    $rows[] = array(sprintf('<fg=yellow;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'WARNING' : '!'), $message, $method);
+                    $rows[] = [sprintf('<fg=yellow;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'WARNING' : '!'), $message, $method];
                 }
             } catch (\Exception $e) {
                 $exitCode = 1;
-                $rows[] = array(sprintf('<fg=red;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'ERROR' : "\xE2\x9C\x98" /* HEAVY BALLOT X (U+2718) */), $message, $e->getMessage());
+                $rows[] = [sprintf('<fg=red;options=bold>%s</>', '\\' === \DIRECTORY_SEPARATOR ? 'ERROR' : "\xE2\x9C\x98" /* HEAVY BALLOT X (U+2718) */), $message, $e->getMessage()];
             }
         }
         // remove the assets of the bundles that no longer exist
@@ -183,7 +183,7 @@ EOT
         }
 
         if ($rows) {
-            $io->table(array('', 'Bundle', 'Method / Error'), $rows);
+            $io->table(['', 'Bundle', 'Method / Error'], $rows);
         }
 
         if (0 !== $exitCode) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
index 1b3b35e477..24aa8171ca 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
@@ -53,10 +53,10 @@ class CacheClearCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputOption('no-warmup', '', InputOption::VALUE_NONE, 'Do not warm up the cache'),
                 new InputOption('no-optional-warmers', '', InputOption::VALUE_NONE, 'Skip optional cache warmers (faster)'),
-            ))
+            ])
             ->setDescription('Clears the cache')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command clears the application cache for a given environment
@@ -137,7 +137,7 @@ EOF
             if ('/' === \DIRECTORY_SEPARATOR && $mounts = @file('/proc/mounts')) {
                 foreach ($mounts as $mount) {
                     $mount = \array_slice(explode(' ', $mount), 1, -3);
-                    if (!\in_array(array_pop($mount), array('vboxsf', 'nfs'))) {
+                    if (!\in_array(array_pop($mount), ['vboxsf', 'nfs'])) {
                         continue;
                     }
                     $mount = implode(' ', $mount).'/';
@@ -195,7 +195,7 @@ EOF
         }
 
         // fix references to cached files with the real cache directory name
-        $search = array($warmupDir, str_replace('\\', '\\\\', $warmupDir));
+        $search = [$warmupDir, str_replace('\\', '\\\\', $warmupDir)];
         $replace = str_replace('\\', '/', $realCacheDir);
         foreach (Finder::create()->files()->in($warmupDir) as $file) {
             $content = str_replace($search, $replace, file_get_contents($file), $count);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolClearCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolClearCommand.php
index e90bb65b33..dc42910d34 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolClearCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolClearCommand.php
@@ -44,9 +44,9 @@ final class CachePoolClearCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('pools', InputArgument::IS_ARRAY | InputArgument::REQUIRED, 'A list of cache pools or cache pool clearers'),
-            ))
+            ])
             ->setDescription('Clears cache pools')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command clears the given cache pools or cache pool clearers.
@@ -64,8 +64,8 @@ EOF
     {
         $io = new SymfonyStyle($input, $output);
         $kernel = $this->getApplication()->getKernel();
-        $pools = array();
-        $clearers = array();
+        $pools = [];
+        $clearers = [];
 
         foreach ($input->getArgument('pools') as $id) {
             if ($this->poolClearer->hasPool($id)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolDeleteCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolDeleteCommand.php
index 91ca64acfe..656f9a9de3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolDeleteCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CachePoolDeleteCommand.php
@@ -42,10 +42,10 @@ final class CachePoolDeleteCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('pool', InputArgument::REQUIRED, 'The cache pool from which to delete an item'),
                 new InputArgument('key', InputArgument::REQUIRED, 'The cache key to delete from the pool'),
-            ))
+            ])
             ->setDescription('Deletes an item from a cache pool')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> deletes an item from a given cache pool.
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/CacheWarmupCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/CacheWarmupCommand.php
index ccd315cad5..04b5d2f7c6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/CacheWarmupCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/CacheWarmupCommand.php
@@ -44,9 +44,9 @@ class CacheWarmupCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputOption('no-optional-warmers', '', InputOption::VALUE_NONE, 'Skip optional cache warmers (faster)'),
-            ))
+            ])
             ->setDescription('Warms up an empty cache')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command warms up the cache.
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDebugCommand.php
index 7b41131b2c..a4a10805f6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDebugCommand.php
@@ -37,10 +37,10 @@ class ConfigDebugCommand extends AbstractConfigCommand
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::OPTIONAL, 'The bundle name or the extension alias'),
                 new InputArgument('path', InputArgument::OPTIONAL, 'The configuration option path'),
-            ))
+            ])
             ->setDescription('Dumps the current configuration for an extension')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command dumps the current configuration for an
@@ -95,7 +95,7 @@ EOF
                 sprintf('Current configuration for %s', ($name === $extensionAlias ? sprintf('extension with alias "%s"', $extensionAlias) : sprintf('"%s"', $name)))
             );
 
-            $io->writeln(Yaml::dump(array($extensionAlias => $config), 10));
+            $io->writeln(Yaml::dump([$extensionAlias => $config], 10));
 
             return;
         }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
index 96bcb51ba0..8640c0bacc 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ConfigDumpReferenceCommand.php
@@ -39,11 +39,11 @@ class ConfigDumpReferenceCommand extends AbstractConfigCommand
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::OPTIONAL, 'The Bundle name or the extension alias'),
                 new InputArgument('path', InputArgument::OPTIONAL, 'The configuration option path'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (yaml or xml)', 'yaml'),
-            ))
+            ])
             ->setDescription('Dumps the default configuration for an extension')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command dumps the default configuration for an
@@ -81,17 +81,17 @@ EOF
 
         if (null === $name = $input->getArgument('name')) {
             $this->listBundles($errorIo);
-            $errorIo->comment(array(
+            $errorIo->comment([
                 'Provide the name of a bundle as the first argument of this command to dump its default configuration. (e.g. <comment>config:dump-reference FrameworkBundle</comment>)',
                 'For dumping a specific option, add its path as the second argument of this command. (e.g. <comment>config:dump-reference FrameworkBundle profiler.matcher</comment> to dump the <comment>framework.profiler.matcher</comment> configuration)',
-            ));
+            ]);
 
             return;
         }
 
         $extension = $this->findExtension($name);
 
-        $configuration = $extension->getConfiguration(array(), $this->getContainerBuilder());
+        $configuration = $extension->getConfiguration([], $this->getContainerBuilder());
 
         $this->validateConfiguration($extension, $configuration);
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
index 575d109dd6..9b5193d63b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php
@@ -48,7 +48,7 @@ class ContainerDebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::OPTIONAL, 'A service name (foo)'),
                 new InputOption('show-private', null, InputOption::VALUE_NONE, 'Used to show public *and* private services (deprecated)'),
                 new InputOption('show-arguments', null, InputOption::VALUE_NONE, 'Used to show arguments in services'),
@@ -60,7 +60,7 @@ class ContainerDebugCommand extends Command
                 new InputOption('types', null, InputOption::VALUE_NONE, 'Displays types (classes/interfaces) available in the container'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
                 new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw description'),
-            ))
+            ])
             ->setDescription('Displays current services for an application')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays all configured <comment>public</comment> services:
@@ -117,26 +117,26 @@ EOF
         $object = $this->getContainerBuilder();
 
         if ($input->getOption('types')) {
-            $options = array();
-            $options['filter'] = array($this, 'filterToServiceTypes');
+            $options = [];
+            $options['filter'] = [$this, 'filterToServiceTypes'];
         } elseif ($input->getOption('parameters')) {
-            $parameters = array();
+            $parameters = [];
             foreach ($object->getParameterBag()->all() as $k => $v) {
                 $parameters[$k] = $object->resolveEnvPlaceholders($v);
             }
             $object = new ParameterBag($parameters);
-            $options = array();
+            $options = [];
         } elseif ($parameter = $input->getOption('parameter')) {
-            $options = array('parameter' => $parameter);
+            $options = ['parameter' => $parameter];
         } elseif ($input->getOption('tags')) {
-            $options = array('group_by' => 'tags');
+            $options = ['group_by' => 'tags'];
         } elseif ($tag = $input->getOption('tag')) {
-            $options = array('tag' => $tag);
+            $options = ['tag' => $tag];
         } elseif ($name = $input->getArgument('name')) {
             $name = $this->findProperServiceName($input, $errorIo, $object, $name, $input->getOption('show-hidden'));
-            $options = array('id' => $name);
+            $options = ['id' => $name];
         } else {
-            $options = array();
+            $options = [];
         }
 
         $helper = new DescriptorHelper();
@@ -150,7 +150,7 @@ EOF
             $helper->describe($io, $object, $options);
         } catch (ServiceNotFoundException $e) {
             if ('' !== $e->getId() && '@' === $e->getId()[0]) {
-                throw new ServiceNotFoundException($e->getId(), $e->getSourceId(), null, array(substr($e->getId(), 1)));
+                throw new ServiceNotFoundException($e->getId(), $e->getSourceId(), null, [substr($e->getId(), 1)]);
             }
 
             throw $e;
@@ -174,7 +174,7 @@ EOF
      */
     protected function validateInput(InputInterface $input)
     {
-        $options = array('tags', 'tag', 'parameters', 'parameter');
+        $options = ['tags', 'tag', 'parameters', 'parameter'];
 
         $optionsCount = 0;
         foreach ($options as $option) {
@@ -209,7 +209,7 @@ EOF
         if (!$kernel->isDebug() || !(new ConfigCache($kernel->getContainer()->getParameter('debug.container.dump'), true))->isFresh()) {
             $buildContainer = \Closure::bind(function () { return $this->buildContainer(); }, $kernel, \get_class($kernel));
             $container = $buildContainer();
-            $container->getCompilerPassConfig()->setRemovingPasses(array());
+            $container->getCompilerPassConfig()->setRemovingPasses([]);
             $container->compile();
         } else {
             (new XmlFileLoader($container = new ContainerBuilder(), new FileLocator()))->load($kernel->getContainer()->getParameter('debug.container.dump'));
@@ -239,7 +239,7 @@ EOF
     private function findServiceIdsContaining(ContainerBuilder $builder, string $name, bool $showHidden)
     {
         $serviceIds = $builder->getServiceIds();
-        $foundServiceIds = $foundServiceIdsIgnoringBackslashes = array();
+        $foundServiceIds = $foundServiceIdsIgnoringBackslashes = [];
         foreach ($serviceIds as $serviceId) {
             if (!$showHidden && 0 === strpos($serviceId, '.')) {
                 continue;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
index 1c832c04d3..a1097592ee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/DebugAutowiringCommand.php
@@ -35,10 +35,10 @@ class DebugAutowiringCommand extends ContainerDebugCommand
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('search', InputArgument::OPTIONAL, 'A search filter'),
                 new InputOption('all', null, InputOption::VALUE_NONE, 'Show also services that are not aliased'),
-            ))
+            ])
             ->setDescription('Lists classes/interfaces you can use for autowiring')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays the classes and interfaces that
@@ -65,7 +65,7 @@ EOF
 
         $builder = $this->getContainerBuilder();
         $serviceIds = $builder->getServiceIds();
-        $serviceIds = array_filter($serviceIds, array($this, 'filterToServiceTypes'));
+        $serviceIds = array_filter($serviceIds, [$this, 'filterToServiceTypes']);
 
         if ($search = $input->getArgument('search')) {
             $serviceIds = array_filter($serviceIds, function ($serviceId) use ($search) {
@@ -86,11 +86,11 @@ EOF
         if ($search) {
             $io->text(sprintf('(only showing classes/interfaces matching <comment>%s</comment>)', $search));
         }
-        $hasAlias = array();
+        $hasAlias = [];
         $all = $input->getOption('all');
         $previousId = '-';
         foreach ($serviceIds as $serviceId) {
-            $text = array();
+            $text = [];
             if (0 !== strpos($serviceId, $previousId)) {
                 $text[] = '';
                 if ('' !== $description = Descriptor::getClassDescription($serviceId, $serviceId)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/EventDispatcherDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/EventDispatcherDebugCommand.php
index 8749f7a30f..e61f543e7f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/EventDispatcherDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/EventDispatcherDebugCommand.php
@@ -45,11 +45,11 @@ class EventDispatcherDebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('event', InputArgument::OPTIONAL, 'An event name'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format  (txt, xml, json, or md)', 'txt'),
                 new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw description'),
-            ))
+            ])
             ->setDescription('Displays configured listeners for an application')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays all configured listeners:
@@ -73,7 +73,7 @@ EOF
     {
         $io = new SymfonyStyle($input, $output);
 
-        $options = array();
+        $options = [];
         if ($event = $input->getArgument('event')) {
             if (!$this->dispatcher->hasListeners($event)) {
                 $io->getErrorStyle()->warning(sprintf('The event "%s" does not have any registered listeners.', $event));
@@ -81,7 +81,7 @@ EOF
                 return;
             }
 
-            $options = array('event' => $event);
+            $options = ['event' => $event];
         }
 
         $helper = new DescriptorHelper();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/RouterDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/RouterDebugCommand.php
index 7d651ed2f3..ec8d53b06c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/RouterDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/RouterDebugCommand.php
@@ -48,12 +48,12 @@ class RouterDebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::OPTIONAL, 'A route name'),
                 new InputOption('show-controllers', null, InputOption::VALUE_NONE, 'Show assigned controllers in overview'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
                 new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw route(s)'),
-            ))
+            ])
             ->setDescription('Displays current routes for an application')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> displays the configured routes:
@@ -88,25 +88,25 @@ EOF
                 throw new InvalidArgumentException(sprintf('The route "%s" does not exist.', $name));
             }
 
-            $helper->describe($io, $route, array(
+            $helper->describe($io, $route, [
                 'format' => $input->getOption('format'),
                 'raw_text' => $input->getOption('raw'),
                 'name' => $name,
                 'output' => $io,
-            ));
+            ]);
         } else {
-            $helper->describe($io, $routes, array(
+            $helper->describe($io, $routes, [
                 'format' => $input->getOption('format'),
                 'raw_text' => $input->getOption('raw'),
                 'show_controllers' => $input->getOption('show-controllers'),
                 'output' => $io,
-            ));
+            ]);
         }
     }
 
     private function findRouteNameContaining(string $name, RouteCollection $routes): array
     {
-        $foundRoutesNames = array();
+        $foundRoutesNames = [];
         foreach ($routes as $routeName => $route) {
             if (false !== stripos($routeName, $name)) {
                 $foundRoutesNames[] = $routeName;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/RouterMatchCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/RouterMatchCommand.php
index 55d3dea128..dd40352df7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/RouterMatchCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/RouterMatchCommand.php
@@ -47,12 +47,12 @@ class RouterMatchCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('path_info', InputArgument::REQUIRED, 'A path info'),
                 new InputOption('method', null, InputOption::VALUE_REQUIRED, 'Sets the HTTP method'),
                 new InputOption('scheme', null, InputOption::VALUE_REQUIRED, 'Sets the URI scheme (usually http or https)'),
                 new InputOption('host', null, InputOption::VALUE_REQUIRED, 'Sets the URI host'),
-            ))
+            ])
             ->setDescription('Helps debug routes by simulating a path info match')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> shows which routes match a given request and which don't and for what reason:
@@ -100,7 +100,7 @@ EOF
                 $io->success(sprintf('Route "%s" matches', $trace['name']));
 
                 $routerDebugCommand = $this->getApplication()->find('debug:router');
-                $routerDebugCommand->run(new ArrayInput(array('name' => $trace['name'])), $output);
+                $routerDebugCommand->run(new ArrayInput(['name' => $trace['name']]), $output);
 
                 $matches = true;
             } elseif ($input->getOption('verbose')) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
index 92c1c07628..0b284e61c0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationDebugCommand.php
@@ -74,14 +74,14 @@ class TranslationDebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('locale', InputArgument::REQUIRED, 'The locale'),
                 new InputArgument('bundle', InputArgument::OPTIONAL, 'The bundle name or directory where to load the messages'),
                 new InputOption('domain', null, InputOption::VALUE_OPTIONAL, 'The messages domain'),
                 new InputOption('only-missing', null, InputOption::VALUE_NONE, 'Displays only missing messages'),
                 new InputOption('only-unused', null, InputOption::VALUE_NONE, 'Displays only unused messages'),
                 new InputOption('all', null, InputOption::VALUE_NONE, 'Load messages from all registered bundles'),
-            ))
+            ])
             ->setDescription('Displays translation messages information')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command helps finding unused or missing translation
@@ -131,7 +131,7 @@ EOF
         $rootDir = $kernel->getContainer()->getParameter('kernel.root_dir');
 
         // Define Root Paths
-        $transPaths = array();
+        $transPaths = [];
         if (is_dir($dir = $rootDir.'/Resources/translations')) {
             if ($dir !== $this->defaultTransPath) {
                 $notice = sprintf('Storing translations in the "%s" directory is deprecated since Symfony 4.2, ', $dir);
@@ -142,7 +142,7 @@ EOF
         if ($this->defaultTransPath) {
             $transPaths[] = $this->defaultTransPath;
         }
-        $viewsPaths = array();
+        $viewsPaths = [];
         if (is_dir($dir = $rootDir.'/Resources/views')) {
             if ($dir !== $this->defaultViewsPath) {
                 $notice = sprintf('Storing templates in the "%s" directory is deprecated since Symfony 4.2, ', $dir);
@@ -158,7 +158,7 @@ EOF
         if (null !== $input->getArgument('bundle')) {
             try {
                 $bundle = $kernel->getBundle($input->getArgument('bundle'));
-                $transPaths = array($bundle->getPath().'/Resources/translations');
+                $transPaths = [$bundle->getPath().'/Resources/translations'];
                 if ($this->defaultTransPath) {
                     $transPaths[] = $this->defaultTransPath;
                 }
@@ -167,7 +167,7 @@ EOF
                     $notice = sprintf('Storing translations files for "%s" in the "%s" directory is deprecated since Symfony 4.2, ', $dir, $bundle->getName());
                     @trigger_error($notice.($this->defaultTransPath ? sprintf('use the "%s" directory instead.', $this->defaultTransPath) : 'configure and use "framework.translator.default_path" instead.'), E_USER_DEPRECATED);
                 }
-                $viewsPaths = array($bundle->getPath().'/Resources/views');
+                $viewsPaths = [$bundle->getPath().'/Resources/views'];
                 if ($this->defaultViewsPath) {
                     $viewsPaths[] = $this->defaultViewsPath;
                 }
@@ -180,7 +180,7 @@ EOF
                 // such a bundle does not exist, so treat the argument as path
                 $path = $input->getArgument('bundle');
 
-                $transPaths = array($path.'/translations');
+                $transPaths = [$path.'/translations'];
                 if (is_dir($dir = $path.'/Resources/translations')) {
                     if ($dir !== $this->defaultTransPath) {
                         @trigger_error(sprintf('Storing translations in the "%s" directory is deprecated since Symfony 4.2, use the "%s" directory instead.', $dir, $path.'/translations'), E_USER_DEPRECATED);
@@ -188,7 +188,7 @@ EOF
                     $transPaths[] = $dir;
                 }
 
-                $viewsPaths = array($path.'/templates');
+                $viewsPaths = [$path.'/templates'];
                 if (is_dir($dir = $path.'/Resources/views')) {
                     if ($dir !== $this->defaultViewsPath) {
                         @trigger_error(sprintf('Storing templates in the "%s" directory is deprecated since Symfony 4.2, use the "%s" directory instead.', $dir, $path.'/templates'), E_USER_DEPRECATED);
@@ -227,7 +227,7 @@ EOF
         $mergeOperation = new MergeOperation($extractedCatalogue, $currentCatalogue);
         $allMessages = $mergeOperation->getResult()->all($domain);
         if (null !== $domain) {
-            $allMessages = array($domain => $allMessages);
+            $allMessages = [$domain => $allMessages];
         }
 
         // No defined or extracted messages
@@ -247,16 +247,16 @@ EOF
         $fallbackCatalogues = $this->loadFallbackCatalogues($locale, $transPaths);
 
         // Display header line
-        $headers = array('State', 'Domain', 'Id', sprintf('Message Preview (%s)', $locale));
+        $headers = ['State', 'Domain', 'Id', sprintf('Message Preview (%s)', $locale)];
         foreach ($fallbackCatalogues as $fallbackCatalogue) {
             $headers[] = sprintf('Fallback Message Preview (%s)', $fallbackCatalogue->getLocale());
         }
-        $rows = array();
+        $rows = [];
         // Iterate all message ids and determine their state
         foreach ($allMessages as $domain => $messages) {
             foreach (array_keys($messages) as $messageId) {
                 $value = $currentCatalogue->get($messageId, $domain);
-                $states = array();
+                $states = [];
 
                 if ($extractedCatalogue->defines($messageId, $domain)) {
                     if (!$currentCatalogue->defines($messageId, $domain)) {
@@ -279,7 +279,7 @@ EOF
                     }
                 }
 
-                $row = array($this->formatStates($states), $domain, $this->formatId($messageId), $this->sanitizeString($value));
+                $row = [$this->formatStates($states), $domain, $this->formatId($messageId), $this->sanitizeString($value)];
                 foreach ($fallbackCatalogues as $fallbackCatalogue) {
                     $row[] = $this->sanitizeString($fallbackCatalogue->get($messageId, $domain));
                 }
@@ -310,7 +310,7 @@ EOF
 
     private function formatStates(array $states): string
     {
-        $result = array();
+        $result = [];
         foreach ($states as $state) {
             $result[] = $this->formatState($state);
         }
@@ -367,7 +367,7 @@ EOF
      */
     private function loadFallbackCatalogues(string $locale, array $transPaths): array
     {
-        $fallbackCatalogues = array();
+        $fallbackCatalogues = [];
         if ($this->translator instanceof Translator || $this->translator instanceof DataCollectorTranslator || $this->translator instanceof LoggingTranslator) {
             foreach ($this->translator->getFallbackLocales() as $fallbackLocale) {
                 if ($fallbackLocale === $locale) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
index 6e009173d7..43c71c9ec8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/TranslationUpdateCommand.php
@@ -63,7 +63,7 @@ class TranslationUpdateCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('locale', InputArgument::REQUIRED, 'The locale'),
                 new InputArgument('bundle', InputArgument::OPTIONAL, 'The bundle name or directory where to load the messages'),
                 new InputOption('prefix', null, InputOption::VALUE_OPTIONAL, 'Override the default prefix', '__'),
@@ -73,7 +73,7 @@ class TranslationUpdateCommand extends Command
                 new InputOption('no-backup', null, InputOption::VALUE_NONE, 'Should backup be disabled'),
                 new InputOption('clean', null, InputOption::VALUE_NONE, 'Should clean not found messages'),
                 new InputOption('domain', null, InputOption::VALUE_OPTIONAL, 'Specify the domain to update'),
-            ))
+            ])
             ->setDescription('Updates the translation file')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command extracts translation strings from templates
@@ -112,7 +112,7 @@ EOF
         // check format
         $supportedFormats = $this->writer->getFormats();
         if (!\in_array($input->getOption('output-format'), $supportedFormats, true)) {
-            $errorIo->error(array('Wrong output format', 'Supported formats are: '.implode(', ', $supportedFormats).'.'));
+            $errorIo->error(['Wrong output format', 'Supported formats are: '.implode(', ', $supportedFormats).'.']);
 
             return 1;
         }
@@ -121,7 +121,7 @@ EOF
         $rootDir = $kernel->getContainer()->getParameter('kernel.root_dir');
 
         // Define Root Paths
-        $transPaths = array();
+        $transPaths = [];
         if (is_dir($dir = $rootDir.'/Resources/translations')) {
             if ($dir !== $this->defaultTransPath) {
                 $notice = sprintf('Storing translations in the "%s" directory is deprecated since Symfony 4.2, ', $dir);
@@ -132,7 +132,7 @@ EOF
         if ($this->defaultTransPath) {
             $transPaths[] = $this->defaultTransPath;
         }
-        $viewsPaths = array();
+        $viewsPaths = [];
         if (is_dir($dir = $rootDir.'/Resources/views')) {
             if ($dir !== $this->defaultViewsPath) {
                 $notice = sprintf('Storing templates in the "%s" directory is deprecated since Symfony 4.2, ', $dir);
@@ -149,7 +149,7 @@ EOF
         if (null !== $input->getArgument('bundle')) {
             try {
                 $foundBundle = $kernel->getBundle($input->getArgument('bundle'));
-                $transPaths = array($foundBundle->getPath().'/Resources/translations');
+                $transPaths = [$foundBundle->getPath().'/Resources/translations'];
                 if ($this->defaultTransPath) {
                     $transPaths[] = $this->defaultTransPath;
                 }
@@ -158,7 +158,7 @@ EOF
                     $notice = sprintf('Storing translations files for "%s" in the "%s" directory is deprecated since Symfony 4.2, ', $foundBundle->getName(), $dir);
                     @trigger_error($notice.($this->defaultTransPath ? sprintf('use the "%s" directory instead.', $this->defaultTransPath) : 'configure and use "framework.translator.default_path" instead.'), E_USER_DEPRECATED);
                 }
-                $viewsPaths = array($foundBundle->getPath().'/Resources/views');
+                $viewsPaths = [$foundBundle->getPath().'/Resources/views'];
                 if ($this->defaultViewsPath) {
                     $viewsPaths[] = $this->defaultViewsPath;
                 }
@@ -172,7 +172,7 @@ EOF
                 // such a bundle does not exist, so treat the argument as path
                 $path = $input->getArgument('bundle');
 
-                $transPaths = array($path.'/translations');
+                $transPaths = [$path.'/translations'];
                 if (is_dir($dir = $path.'/Resources/translations')) {
                     if ($dir !== $this->defaultTransPath) {
                         @trigger_error(sprintf('Storing translations in the "%s" directory is deprecated since Symfony 4.2, use the "%s" directory instead.', $dir, $path.'/translations'), E_USER_DEPRECATED);
@@ -180,7 +180,7 @@ EOF
                     $transPaths[] = $dir;
                 }
 
-                $viewsPaths = array($path.'/templates');
+                $viewsPaths = [$path.'/templates'];
                 if (is_dir($dir = $path.'/Resources/views')) {
                     if ($dir !== $this->defaultViewsPath) {
                         @trigger_error(sprintf('Storing templates in the "%s" directory is deprecated since Symfony 4.2, use the "%s" directory instead.', $dir, $path.'/templates'), E_USER_DEPRECATED);
@@ -287,7 +287,7 @@ EOF
                 $bundleTransPath = end($transPaths);
             }
 
-            $this->writer->write($operation->getResult(), $input->getOption('output-format'), array('path' => $bundleTransPath, 'default_locale' => $this->defaultLocale));
+            $this->writer->write($operation->getResult(), $input->getOption('output-format'), ['path' => $bundleTransPath, 'default_locale' => $this->defaultLocale]);
 
             if (true === $input->getOption('dump-messages')) {
                 $resultMessage .= ' and translation files were updated';
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/WorkflowDumpCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/WorkflowDumpCommand.php
index 52eb8391c1..ff91dc7818 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/WorkflowDumpCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/WorkflowDumpCommand.php
@@ -37,12 +37,12 @@ class WorkflowDumpCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('name', InputArgument::REQUIRED, 'A workflow name'),
                 new InputArgument('marking', InputArgument::IS_ARRAY, 'A marking (a list of places)'),
                 new InputOption('label', 'l', InputOption::VALUE_REQUIRED, 'Labels a graph'),
                 new InputOption('dump-format', null, InputOption::VALUE_REQUIRED, 'The dump format [dot|puml]', 'dot'),
-            ))
+            ])
             ->setDescription('Dump a workflow')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command dumps the graphical representation of a
@@ -89,13 +89,13 @@ EOF
             $marking->mark($place);
         }
 
-        $options = array(
+        $options = [
             'name' => $serviceId,
             'nofooter' => true,
-            'graph' => array(
+            'graph' => [
                 'label' => $input->getOption('label'),
-            ),
-        );
+            ],
+        ];
         $output->writeln($dumper->dump($workflow->getDefinition(), $marking, $options));
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Application.php b/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
index 51cc1940b3..d14566c239 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
@@ -32,7 +32,7 @@ class Application extends BaseApplication
 {
     private $kernel;
     private $commandsRegistered = false;
-    private $registrationErrors = array();
+    private $registrationErrors = [];
 
     public function __construct(KernelInterface $kernel)
     {
@@ -81,7 +81,7 @@ class Application extends BaseApplication
         if (!$command instanceof ListCommand) {
             if ($this->registrationErrors) {
                 $this->renderRegistrationErrors($input, $output);
-                $this->registrationErrors = array();
+                $this->registrationErrors = [];
             }
 
             return parent::doRunCommand($command, $input, $output);
@@ -91,7 +91,7 @@ class Application extends BaseApplication
 
         if ($this->registrationErrors) {
             $this->renderRegistrationErrors($input, $output);
-            $this->registrationErrors = array();
+            $this->registrationErrors = [];
         }
 
         return $returnCode;
@@ -177,7 +177,7 @@ class Application extends BaseApplication
         }
 
         if ($container->hasParameter('console.command.ids')) {
-            $lazyCommandIds = $container->hasParameter('console.lazy_command.ids') ? $container->getParameter('console.lazy_command.ids') : array();
+            $lazyCommandIds = $container->hasParameter('console.lazy_command.ids') ? $container->getParameter('console.lazy_command.ids') : [];
             foreach ($container->getParameter('console.command.ids') as $id) {
                 if (!isset($lazyCommandIds[$id])) {
                     try {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
index 21b2d96115..d2afe921ff 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
@@ -37,7 +37,7 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = array())
+    public function describe(OutputInterface $output, $object, array $options = [])
     {
         $this->output = $output;
 
@@ -104,22 +104,22 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes an InputArgument instance.
      */
-    abstract protected function describeRouteCollection(RouteCollection $routes, array $options = array());
+    abstract protected function describeRouteCollection(RouteCollection $routes, array $options = []);
 
     /**
      * Describes an InputOption instance.
      */
-    abstract protected function describeRoute(Route $route, array $options = array());
+    abstract protected function describeRoute(Route $route, array $options = []);
 
     /**
      * Describes container parameters.
      */
-    abstract protected function describeContainerParameters(ParameterBag $parameters, array $options = array());
+    abstract protected function describeContainerParameters(ParameterBag $parameters, array $options = []);
 
     /**
      * Describes container tags.
      */
-    abstract protected function describeContainerTags(ContainerBuilder $builder, array $options = array());
+    abstract protected function describeContainerTags(ContainerBuilder $builder, array $options = []);
 
     /**
      * Describes a container service by its name.
@@ -131,7 +131,7 @@ abstract class Descriptor implements DescriptorInterface
      * @param array                   $options
      * @param ContainerBuilder|null   $builder
      */
-    abstract protected function describeContainerService($service, array $options = array(), ContainerBuilder $builder = null);
+    abstract protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null);
 
     /**
      * Describes container services.
@@ -139,22 +139,22 @@ abstract class Descriptor implements DescriptorInterface
      * Common options are:
      * * tag: filters described services by given tag
      */
-    abstract protected function describeContainerServices(ContainerBuilder $builder, array $options = array());
+    abstract protected function describeContainerServices(ContainerBuilder $builder, array $options = []);
 
     /**
      * Describes a service definition.
      */
-    abstract protected function describeContainerDefinition(Definition $definition, array $options = array());
+    abstract protected function describeContainerDefinition(Definition $definition, array $options = []);
 
     /**
      * Describes a service alias.
      */
-    abstract protected function describeContainerAlias(Alias $alias, array $options = array(), ContainerBuilder $builder = null);
+    abstract protected function describeContainerAlias(Alias $alias, array $options = [], ContainerBuilder $builder = null);
 
     /**
      * Describes a container parameter.
      */
-    abstract protected function describeContainerParameter($parameter, array $options = array());
+    abstract protected function describeContainerParameter($parameter, array $options = []);
 
     /**
      * Describes event dispatcher listeners.
@@ -162,7 +162,7 @@ abstract class Descriptor implements DescriptorInterface
      * Common options are:
      * * name: name of listened event
      */
-    abstract protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = array());
+    abstract protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = []);
 
     /**
      * Describes a callable.
@@ -170,7 +170,7 @@ abstract class Descriptor implements DescriptorInterface
      * @param callable $callable
      * @param array    $options
      */
-    abstract protected function describeCallable($callable, array $options = array());
+    abstract protected function describeCallable($callable, array $options = []);
 
     /**
      * Formats a value as string.
@@ -247,7 +247,7 @@ abstract class Descriptor implements DescriptorInterface
      */
     protected function findDefinitionsByTag(ContainerBuilder $builder, $showHidden)
     {
-        $definitions = array();
+        $definitions = [];
         $tags = $builder->findTags();
         asort($tags);
 
@@ -260,7 +260,7 @@ abstract class Descriptor implements DescriptorInterface
                 }
 
                 if (!isset($definitions[$tag])) {
-                    $definitions[$tag] = array();
+                    $definitions[$tag] = [];
                 }
 
                 $definitions[$tag][$serviceId] = $definition;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
index e9650c7a9f..06d57dcdb2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
@@ -32,9 +32,9 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRouteCollection(RouteCollection $routes, array $options = array())
+    protected function describeRouteCollection(RouteCollection $routes, array $options = [])
     {
-        $data = array();
+        $data = [];
         foreach ($routes->all() as $name => $route) {
             $data[$name] = $this->getRouteData($route);
         }
@@ -45,7 +45,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRoute(Route $route, array $options = array())
+    protected function describeRoute(Route $route, array $options = [])
     {
         $this->writeData($this->getRouteData($route), $options);
     }
@@ -53,7 +53,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameters(ParameterBag $parameters, array $options = array())
+    protected function describeContainerParameters(ParameterBag $parameters, array $options = [])
     {
         $this->writeData($this->sortParameters($parameters), $options);
     }
@@ -61,13 +61,13 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerTags(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerTags(ContainerBuilder $builder, array $options = [])
     {
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
-        $data = array();
+        $data = [];
 
         foreach ($this->findDefinitionsByTag($builder, $showHidden) as $tag => $definitions) {
-            $data[$tag] = array();
+            $data[$tag] = [];
             foreach ($definitions as $definition) {
                 $data[$tag][] = $this->getContainerDefinitionData($definition, true);
             }
@@ -79,7 +79,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerService($service, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
@@ -97,13 +97,13 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerServices(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerServices(ContainerBuilder $builder, array $options = [])
     {
         $serviceIds = isset($options['tag']) && $options['tag'] ? array_keys($builder->findTaggedServiceIds($options['tag'])) : $builder->getServiceIds();
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
         $omitTags = isset($options['omit_tags']) && $options['omit_tags'];
         $showArguments = isset($options['show_arguments']) && $options['show_arguments'];
-        $data = array('definitions' => array(), 'aliases' => array(), 'services' => array());
+        $data = ['definitions' => [], 'aliases' => [], 'services' => []];
 
         if (isset($options['filter'])) {
             $serviceIds = array_filter($serviceIds, $options['filter']);
@@ -131,7 +131,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerDefinition(Definition $definition, array $options = array())
+    protected function describeContainerDefinition(Definition $definition, array $options = [])
     {
         $this->writeData($this->getContainerDefinitionData($definition, isset($options['omit_tags']) && $options['omit_tags'], isset($options['show_arguments']) && $options['show_arguments']), $options);
     }
@@ -139,22 +139,22 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerAlias(Alias $alias, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerAlias(Alias $alias, array $options = [], ContainerBuilder $builder = null)
     {
         if (!$builder) {
             return $this->writeData($this->getContainerAliasData($alias), $options);
         }
 
         $this->writeData(
-            array($this->getContainerAliasData($alias), $this->getContainerDefinitionData($builder->getDefinition((string) $alias), isset($options['omit_tags']) && $options['omit_tags'], isset($options['show_arguments']) && $options['show_arguments'])),
-            array_merge($options, array('id' => (string) $alias))
+            [$this->getContainerAliasData($alias), $this->getContainerDefinitionData($builder->getDefinition((string) $alias), isset($options['omit_tags']) && $options['omit_tags'], isset($options['show_arguments']) && $options['show_arguments'])],
+            array_merge($options, ['id' => (string) $alias])
         );
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = array())
+    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
         $this->writeData($this->getEventDispatcherListenersData($eventDispatcher, array_key_exists('event', $options) ? $options['event'] : null), $options);
     }
@@ -162,7 +162,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCallable($callable, array $options = array())
+    protected function describeCallable($callable, array $options = [])
     {
         $this->writeData($this->getCallableData($callable, $options), $options);
     }
@@ -170,11 +170,11 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameter($parameter, array $options = array())
+    protected function describeContainerParameter($parameter, array $options = [])
     {
         $key = isset($options['parameter']) ? $options['parameter'] : '';
 
-        $this->writeData(array($key => $parameter), $options);
+        $this->writeData([$key => $parameter], $options);
     }
 
     /**
@@ -193,7 +193,7 @@ class JsonDescriptor extends Descriptor
      */
     protected function getRouteData(Route $route)
     {
-        return array(
+        return [
             'path' => $route->getPath(),
             'pathRegex' => $route->compile()->getRegex(),
             'host' => '' !== $route->getHost() ? $route->getHost() : 'ANY',
@@ -204,12 +204,12 @@ class JsonDescriptor extends Descriptor
             'defaults' => $route->getDefaults(),
             'requirements' => $route->getRequirements() ?: 'NO CUSTOM',
             'options' => $route->getOptions(),
-        );
+        ];
     }
 
     private function getContainerDefinitionData(Definition $definition, bool $omitTags = false, bool $showArguments = false): array
     {
-        $data = array(
+        $data = [
             'class' => (string) $definition->getClass(),
             'public' => $definition->isPublic() && !$definition->isPrivate(),
             'synthetic' => $definition->isSynthetic(),
@@ -218,7 +218,7 @@ class JsonDescriptor extends Descriptor
             'abstract' => $definition->isAbstract(),
             'autowire' => $definition->isAutowired(),
             'autoconfigure' => $definition->isAutoconfigured(),
-        );
+        ];
 
         if ('' !== $classDescription = $this->getClassDescription($definition->getClass())) {
             $data['description'] = $classDescription;
@@ -247,17 +247,17 @@ class JsonDescriptor extends Descriptor
 
         $calls = $definition->getMethodCalls();
         if (\count($calls) > 0) {
-            $data['calls'] = array();
+            $data['calls'] = [];
             foreach ($calls as $callData) {
                 $data['calls'][] = $callData[0];
             }
         }
 
         if (!$omitTags) {
-            $data['tags'] = array();
+            $data['tags'] = [];
             foreach ($definition->getTags() as $tagName => $tagData) {
                 foreach ($tagData as $parameters) {
-                    $data['tags'][] = array('name' => $tagName, 'parameters' => $parameters);
+                    $data['tags'][] = ['name' => $tagName, 'parameters' => $parameters];
                 }
             }
         }
@@ -267,15 +267,15 @@ class JsonDescriptor extends Descriptor
 
     private function getContainerAliasData(Alias $alias): array
     {
-        return array(
+        return [
             'service' => (string) $alias,
             'public' => $alias->isPublic() && !$alias->isPrivate(),
-        );
+        ];
     }
 
     private function getEventDispatcherListenersData(EventDispatcherInterface $eventDispatcher, string $event = null): array
     {
-        $data = array();
+        $data = [];
 
         $registeredListeners = $eventDispatcher->getListeners($event);
         if (null !== $event) {
@@ -299,9 +299,9 @@ class JsonDescriptor extends Descriptor
         return $data;
     }
 
-    private function getCallableData($callable, array $options = array()): array
+    private function getCallableData($callable, array $options = []): array
     {
-        $data = array();
+        $data = [];
 
         if (\is_array($callable)) {
             $data['type'] = 'function';
@@ -373,7 +373,7 @@ class JsonDescriptor extends Descriptor
     private function describeValue($value, $omitTags, $showArguments)
     {
         if (\is_array($value)) {
-            $data = array();
+            $data = [];
             foreach ($value as $k => $v) {
                 $data[$k] = $this->describeValue($v, $omitTags, $showArguments);
             }
@@ -386,10 +386,10 @@ class JsonDescriptor extends Descriptor
         }
 
         if ($value instanceof Reference) {
-            return array(
+            return [
                 'type' => 'service',
                 'id' => (string) $value,
-            );
+            ];
         }
 
         if ($value instanceof ArgumentInterface) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
index 9a93695e56..89180c03ca 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
@@ -30,7 +30,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRouteCollection(RouteCollection $routes, array $options = array())
+    protected function describeRouteCollection(RouteCollection $routes, array $options = [])
     {
         $first = true;
         foreach ($routes->all() as $name => $route) {
@@ -39,7 +39,7 @@ class MarkdownDescriptor extends Descriptor
             } else {
                 $this->write("\n\n");
             }
-            $this->describeRoute($route, array('name' => $name));
+            $this->describeRoute($route, ['name' => $name]);
         }
         $this->write("\n");
     }
@@ -47,7 +47,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRoute(Route $route, array $options = array())
+    protected function describeRoute(Route $route, array $options = [])
     {
         $output = '- Path: '.$route->getPath()
             ."\n".'- Path Regex: '.$route->compile()->getRegex()
@@ -69,7 +69,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameters(ParameterBag $parameters, array $options = array())
+    protected function describeContainerParameters(ParameterBag $parameters, array $options = [])
     {
         $this->write("Container parameters\n====================\n");
         foreach ($this->sortParameters($parameters) as $key => $value) {
@@ -80,7 +80,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerTags(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerTags(ContainerBuilder $builder, array $options = [])
     {
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
         $this->write("Container tags\n==============");
@@ -89,7 +89,7 @@ class MarkdownDescriptor extends Descriptor
             $this->write("\n\n".$tag."\n".str_repeat('-', \strlen($tag)));
             foreach ($definitions as $serviceId => $definition) {
                 $this->write("\n\n");
-                $this->describeContainerDefinition($definition, array('omit_tags' => true, 'id' => $serviceId));
+                $this->describeContainerDefinition($definition, ['omit_tags' => true, 'id' => $serviceId]);
             }
         }
     }
@@ -97,13 +97,13 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerService($service, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
         }
 
-        $childOptions = array_merge($options, array('id' => $options['id'], 'as_array' => true));
+        $childOptions = array_merge($options, ['id' => $options['id'], 'as_array' => true]);
 
         if ($service instanceof Alias) {
             $this->describeContainerAlias($service, $childOptions, $builder);
@@ -117,7 +117,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerServices(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerServices(ContainerBuilder $builder, array $options = [])
     {
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
 
@@ -129,7 +129,7 @@ class MarkdownDescriptor extends Descriptor
 
         $serviceIds = isset($options['tag']) && $options['tag'] ? array_keys($builder->findTaggedServiceIds($options['tag'])) : $builder->getServiceIds();
         $showArguments = isset($options['show_arguments']) && $options['show_arguments'];
-        $services = array('definitions' => array(), 'aliases' => array(), 'services' => array());
+        $services = ['definitions' => [], 'aliases' => [], 'services' => []];
 
         if (isset($options['filter'])) {
             $serviceIds = array_filter($serviceIds, $options['filter']);
@@ -155,7 +155,7 @@ class MarkdownDescriptor extends Descriptor
             $this->write("\n\nDefinitions\n-----------\n");
             foreach ($services['definitions'] as $id => $service) {
                 $this->write("\n");
-                $this->describeContainerDefinition($service, array('id' => $id, 'show_arguments' => $showArguments));
+                $this->describeContainerDefinition($service, ['id' => $id, 'show_arguments' => $showArguments]);
             }
         }
 
@@ -163,7 +163,7 @@ class MarkdownDescriptor extends Descriptor
             $this->write("\n\nAliases\n-------\n");
             foreach ($services['aliases'] as $id => $service) {
                 $this->write("\n");
-                $this->describeContainerAlias($service, array('id' => $id));
+                $this->describeContainerAlias($service, ['id' => $id]);
             }
         }
 
@@ -179,7 +179,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerDefinition(Definition $definition, array $options = array())
+    protected function describeContainerDefinition(Definition $definition, array $options = [])
     {
         $output = '';
 
@@ -242,7 +242,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerAlias(Alias $alias, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerAlias(Alias $alias, array $options = [], ContainerBuilder $builder = null)
     {
         $output = '- Service: `'.$alias.'`'
             ."\n".'- Public: '.($alias->isPublic() && !$alias->isPrivate() ? 'yes' : 'no');
@@ -258,13 +258,13 @@ class MarkdownDescriptor extends Descriptor
         }
 
         $this->write("\n");
-        $this->describeContainerDefinition($builder->getDefinition((string) $alias), array_merge($options, array('id' => (string) $alias)));
+        $this->describeContainerDefinition($builder->getDefinition((string) $alias), array_merge($options, ['id' => (string) $alias]));
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameter($parameter, array $options = array())
+    protected function describeContainerParameter($parameter, array $options = [])
     {
         $this->write(isset($options['parameter']) ? sprintf("%s\n%s\n\n%s", $options['parameter'], str_repeat('=', \strlen($options['parameter'])), $this->formatParameter($parameter)) : $parameter);
     }
@@ -272,7 +272,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = array())
+    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
         $event = array_key_exists('event', $options) ? $options['event'] : null;
 
@@ -308,7 +308,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCallable($callable, array $options = array())
+    protected function describeCallable($callable, array $options = [])
     {
         $string = '';
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
index 3938a5dc11..79566a1ad9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
@@ -36,24 +36,24 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRouteCollection(RouteCollection $routes, array $options = array())
+    protected function describeRouteCollection(RouteCollection $routes, array $options = [])
     {
         $showControllers = isset($options['show_controllers']) && $options['show_controllers'];
 
-        $tableHeaders = array('Name', 'Method', 'Scheme', 'Host', 'Path');
+        $tableHeaders = ['Name', 'Method', 'Scheme', 'Host', 'Path'];
         if ($showControllers) {
             $tableHeaders[] = 'Controller';
         }
 
-        $tableRows = array();
+        $tableRows = [];
         foreach ($routes->all() as $name => $route) {
-            $row = array(
+            $row = [
                 $name,
                 $route->getMethods() ? implode('|', $route->getMethods()) : 'ANY',
                 $route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY',
                 '' !== $route->getHost() ? $route->getHost() : 'ANY',
                 $route->getPath(),
-            );
+            ];
 
             if ($showControllers) {
                 $controller = $route->getDefault('_controller');
@@ -75,22 +75,22 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRoute(Route $route, array $options = array())
+    protected function describeRoute(Route $route, array $options = [])
     {
-        $tableHeaders = array('Property', 'Value');
-        $tableRows = array(
-            array('Route Name', isset($options['name']) ? $options['name'] : ''),
-            array('Path', $route->getPath()),
-            array('Path Regex', $route->compile()->getRegex()),
-            array('Host', ('' !== $route->getHost() ? $route->getHost() : 'ANY')),
-            array('Host Regex', ('' !== $route->getHost() ? $route->compile()->getHostRegex() : '')),
-            array('Scheme', ($route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY')),
-            array('Method', ($route->getMethods() ? implode('|', $route->getMethods()) : 'ANY')),
-            array('Requirements', ($route->getRequirements() ? $this->formatRouterConfig($route->getRequirements()) : 'NO CUSTOM')),
-            array('Class', \get_class($route)),
-            array('Defaults', $this->formatRouterConfig($route->getDefaults())),
-            array('Options', $this->formatRouterConfig($route->getOptions())),
-        );
+        $tableHeaders = ['Property', 'Value'];
+        $tableRows = [
+            ['Route Name', isset($options['name']) ? $options['name'] : ''],
+            ['Path', $route->getPath()],
+            ['Path Regex', $route->compile()->getRegex()],
+            ['Host', ('' !== $route->getHost() ? $route->getHost() : 'ANY')],
+            ['Host Regex', ('' !== $route->getHost() ? $route->compile()->getHostRegex() : '')],
+            ['Scheme', ($route->getSchemes() ? implode('|', $route->getSchemes()) : 'ANY')],
+            ['Method', ($route->getMethods() ? implode('|', $route->getMethods()) : 'ANY')],
+            ['Requirements', ($route->getRequirements() ? $this->formatRouterConfig($route->getRequirements()) : 'NO CUSTOM')],
+            ['Class', \get_class($route)],
+            ['Defaults', $this->formatRouterConfig($route->getDefaults())],
+            ['Options', $this->formatRouterConfig($route->getOptions())],
+        ];
 
         $table = new Table($this->getOutput());
         $table->setHeaders($tableHeaders)->setRows($tableRows);
@@ -100,13 +100,13 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameters(ParameterBag $parameters, array $options = array())
+    protected function describeContainerParameters(ParameterBag $parameters, array $options = [])
     {
-        $tableHeaders = array('Parameter', 'Value');
+        $tableHeaders = ['Parameter', 'Value'];
 
-        $tableRows = array();
+        $tableRows = [];
         foreach ($this->sortParameters($parameters) as $parameter => $value) {
-            $tableRows[] = array($parameter, $this->formatParameter($value));
+            $tableRows[] = [$parameter, $this->formatParameter($value)];
         }
 
         $options['output']->title('Symfony Container Parameters');
@@ -116,7 +116,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerTags(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerTags(ContainerBuilder $builder, array $options = [])
     {
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
 
@@ -135,7 +135,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerService($service, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
@@ -148,10 +148,10 @@ class TextDescriptor extends Descriptor
         } else {
             $options['output']->title(sprintf('Information for Service "<info>%s</info>"', $options['id']));
             $options['output']->table(
-                array('Service ID', 'Class'),
-                array(
-                    array(isset($options['id']) ? $options['id'] : '-', \get_class($service)),
-                )
+                ['Service ID', 'Class'],
+                [
+                    [isset($options['id']) ? $options['id'] : '-', \get_class($service)],
+                ]
             );
         }
     }
@@ -159,7 +159,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerServices(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerServices(ContainerBuilder $builder, array $options = [])
     {
         $showHidden = isset($options['show_hidden']) && $options['show_hidden'];
         $showTag = isset($options['tag']) ? $options['tag'] : null;
@@ -177,7 +177,7 @@ class TextDescriptor extends Descriptor
         $options['output']->title($title);
 
         $serviceIds = isset($options['tag']) && $options['tag'] ? array_keys($builder->findTaggedServiceIds($options['tag'])) : $builder->getServiceIds();
-        $maxTags = array();
+        $maxTags = [];
 
         if (isset($options['filter'])) {
             $serviceIds = array_filter($serviceIds, $options['filter']);
@@ -212,8 +212,8 @@ class TextDescriptor extends Descriptor
         $tagsCount = \count($maxTags);
         $tagsNames = array_keys($maxTags);
 
-        $tableHeaders = array_merge(array('Service ID'), $tagsNames, array('Class name'));
-        $tableRows = array();
+        $tableHeaders = array_merge(['Service ID'], $tagsNames, ['Class name']);
+        $tableRows = [];
         $rawOutput = isset($options['raw_text']) && $options['raw_text'];
         foreach ($this->sortServiceIds($serviceIds) as $serviceId) {
             $definition = $this->resolveServiceDefinition($builder, $serviceId);
@@ -222,24 +222,24 @@ class TextDescriptor extends Descriptor
             if ($definition instanceof Definition) {
                 if ($showTag) {
                     foreach ($definition->getTag($showTag) as $key => $tag) {
-                        $tagValues = array();
+                        $tagValues = [];
                         foreach ($tagsNames as $tagName) {
                             $tagValues[] = isset($tag[$tagName]) ? $tag[$tagName] : '';
                         }
                         if (0 === $key) {
-                            $tableRows[] = array_merge(array($serviceId), $tagValues, array($definition->getClass()));
+                            $tableRows[] = array_merge([$serviceId], $tagValues, [$definition->getClass()]);
                         } else {
-                            $tableRows[] = array_merge(array('  "'), $tagValues, array(''));
+                            $tableRows[] = array_merge(['  "'], $tagValues, ['']);
                         }
                     }
                 } else {
-                    $tableRows[] = array($styledServiceId, $definition->getClass());
+                    $tableRows[] = [$styledServiceId, $definition->getClass()];
                 }
             } elseif ($definition instanceof Alias) {
                 $alias = $definition;
-                $tableRows[] = array_merge(array($styledServiceId, sprintf('alias for "%s"', $alias)), $tagsCount ? array_fill(0, $tagsCount, '') : array());
+                $tableRows[] = array_merge([$styledServiceId, sprintf('alias for "%s"', $alias)], $tagsCount ? array_fill(0, $tagsCount, '') : []);
             } else {
-                $tableRows[] = array_merge(array($styledServiceId, \get_class($definition)), $tagsCount ? array_fill(0, $tagsCount, '') : array());
+                $tableRows[] = array_merge([$styledServiceId, \get_class($definition)], $tagsCount ? array_fill(0, $tagsCount, '') : []);
             }
         }
 
@@ -249,7 +249,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerDefinition(Definition $definition, array $options = array())
+    protected function describeContainerDefinition(Definition $definition, array $options = [])
     {
         if (isset($options['id'])) {
             $options['output']->title(sprintf('Information for Service "<info>%s</info>"', $options['id']));
@@ -259,14 +259,14 @@ class TextDescriptor extends Descriptor
             $options['output']->text($classDescription."\n");
         }
 
-        $tableHeaders = array('Option', 'Value');
+        $tableHeaders = ['Option', 'Value'];
 
-        $tableRows[] = array('Service ID', isset($options['id']) ? $options['id'] : '-');
-        $tableRows[] = array('Class', $definition->getClass() ?: '-');
+        $tableRows[] = ['Service ID', isset($options['id']) ? $options['id'] : '-'];
+        $tableRows[] = ['Class', $definition->getClass() ?: '-'];
 
         $omitTags = isset($options['omit_tags']) && $options['omit_tags'];
         if (!$omitTags && ($tags = $definition->getTags())) {
-            $tagInformation = array();
+            $tagInformation = [];
             foreach ($tags as $tagName => $tagData) {
                 foreach ($tagData as $tagParameters) {
                     $parameters = array_map(function ($key, $value) {
@@ -285,46 +285,46 @@ class TextDescriptor extends Descriptor
         } else {
             $tagInformation = '-';
         }
-        $tableRows[] = array('Tags', $tagInformation);
+        $tableRows[] = ['Tags', $tagInformation];
 
         $calls = $definition->getMethodCalls();
         if (\count($calls) > 0) {
-            $callInformation = array();
+            $callInformation = [];
             foreach ($calls as $call) {
                 $callInformation[] = $call[0];
             }
-            $tableRows[] = array('Calls', implode(', ', $callInformation));
+            $tableRows[] = ['Calls', implode(', ', $callInformation)];
         }
 
-        $tableRows[] = array('Public', $definition->isPublic() && !$definition->isPrivate() ? 'yes' : 'no');
-        $tableRows[] = array('Synthetic', $definition->isSynthetic() ? 'yes' : 'no');
-        $tableRows[] = array('Lazy', $definition->isLazy() ? 'yes' : 'no');
-        $tableRows[] = array('Shared', $definition->isShared() ? 'yes' : 'no');
-        $tableRows[] = array('Abstract', $definition->isAbstract() ? 'yes' : 'no');
-        $tableRows[] = array('Autowired', $definition->isAutowired() ? 'yes' : 'no');
-        $tableRows[] = array('Autoconfigured', $definition->isAutoconfigured() ? 'yes' : 'no');
+        $tableRows[] = ['Public', $definition->isPublic() && !$definition->isPrivate() ? 'yes' : 'no'];
+        $tableRows[] = ['Synthetic', $definition->isSynthetic() ? 'yes' : 'no'];
+        $tableRows[] = ['Lazy', $definition->isLazy() ? 'yes' : 'no'];
+        $tableRows[] = ['Shared', $definition->isShared() ? 'yes' : 'no'];
+        $tableRows[] = ['Abstract', $definition->isAbstract() ? 'yes' : 'no'];
+        $tableRows[] = ['Autowired', $definition->isAutowired() ? 'yes' : 'no'];
+        $tableRows[] = ['Autoconfigured', $definition->isAutoconfigured() ? 'yes' : 'no'];
 
         if ($definition->getFile()) {
-            $tableRows[] = array('Required File', $definition->getFile() ?: '-');
+            $tableRows[] = ['Required File', $definition->getFile() ?: '-'];
         }
 
         if ($factory = $definition->getFactory()) {
             if (\is_array($factory)) {
                 if ($factory[0] instanceof Reference) {
-                    $tableRows[] = array('Factory Service', $factory[0]);
+                    $tableRows[] = ['Factory Service', $factory[0]];
                 } elseif ($factory[0] instanceof Definition) {
                     throw new \InvalidArgumentException('Factory is not describable.');
                 } else {
-                    $tableRows[] = array('Factory Class', $factory[0]);
+                    $tableRows[] = ['Factory Class', $factory[0]];
                 }
-                $tableRows[] = array('Factory Method', $factory[1]);
+                $tableRows[] = ['Factory Method', $factory[1]];
             } else {
-                $tableRows[] = array('Factory Function', $factory);
+                $tableRows[] = ['Factory Function', $factory];
             }
         }
 
         $showArguments = isset($options['show_arguments']) && $options['show_arguments'];
-        $argumentsInformation = array();
+        $argumentsInformation = [];
         if ($showArguments && ($arguments = $definition->getArguments())) {
             foreach ($arguments as $argument) {
                 if ($argument instanceof ServiceClosureArgument) {
@@ -343,7 +343,7 @@ class TextDescriptor extends Descriptor
                 }
             }
 
-            $tableRows[] = array('Arguments', implode("\n", $argumentsInformation));
+            $tableRows[] = ['Arguments', implode("\n", $argumentsInformation)];
         }
 
         $options['output']->table($tableHeaders, $tableRows);
@@ -352,7 +352,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerAlias(Alias $alias, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerAlias(Alias $alias, array $options = [], ContainerBuilder $builder = null)
     {
         if ($alias->isPublic()) {
             $options['output']->comment(sprintf('This service is a <info>public</info> alias for the service <info>%s</info>', (string) $alias));
@@ -364,26 +364,26 @@ class TextDescriptor extends Descriptor
             return;
         }
 
-        return $this->describeContainerDefinition($builder->getDefinition((string) $alias), array_merge($options, array('id' => (string) $alias)));
+        return $this->describeContainerDefinition($builder->getDefinition((string) $alias), array_merge($options, ['id' => (string) $alias]));
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameter($parameter, array $options = array())
+    protected function describeContainerParameter($parameter, array $options = [])
     {
         $options['output']->table(
-            array('Parameter', 'Value'),
-            array(
-                array($options['parameter'], $this->formatParameter($parameter),
-            ),
-        ));
+            ['Parameter', 'Value'],
+            [
+                [$options['parameter'], $this->formatParameter($parameter),
+            ],
+        ]);
     }
 
     /**
      * {@inheritdoc}
      */
-    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = array())
+    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
         $event = array_key_exists('event', $options) ? $options['event'] : null;
 
@@ -410,19 +410,19 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCallable($callable, array $options = array())
+    protected function describeCallable($callable, array $options = [])
     {
         $this->writeText($this->formatCallable($callable), $options);
     }
 
     private function renderEventListenerTable(EventDispatcherInterface $eventDispatcher, $event, array $eventListeners, SymfonyStyle $io)
     {
-        $tableHeaders = array('Order', 'Callable', 'Priority');
-        $tableRows = array();
+        $tableHeaders = ['Order', 'Callable', 'Priority'];
+        $tableRows = [];
 
         $order = 1;
         foreach ($eventListeners as $order => $listener) {
-            $tableRows[] = array(sprintf('#%d', $order + 1), $this->formatCallable($listener), $eventDispatcher->getListenerPriority($event, $listener));
+            $tableRows[] = [sprintf('#%d', $order + 1), $this->formatCallable($listener), $eventDispatcher->getListenerPriority($event, $listener)];
         }
 
         $io->table($tableHeaders, $tableRows);
@@ -477,7 +477,7 @@ class TextDescriptor extends Descriptor
         throw new \InvalidArgumentException('Callable is not describable.');
     }
 
-    private function writeText(string $content, array $options = array())
+    private function writeText(string $content, array $options = [])
     {
         $this->write(
             isset($options['raw_text']) && $options['raw_text'] ? strip_tags($content) : $content,
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
index ead8fd3744..d66a081aab 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
@@ -33,7 +33,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRouteCollection(RouteCollection $routes, array $options = array())
+    protected function describeRouteCollection(RouteCollection $routes, array $options = [])
     {
         $this->writeDocument($this->getRouteCollectionDocument($routes));
     }
@@ -41,7 +41,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeRoute(Route $route, array $options = array())
+    protected function describeRoute(Route $route, array $options = [])
     {
         $this->writeDocument($this->getRouteDocument($route, isset($options['name']) ? $options['name'] : null));
     }
@@ -49,7 +49,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameters(ParameterBag $parameters, array $options = array())
+    protected function describeContainerParameters(ParameterBag $parameters, array $options = [])
     {
         $this->writeDocument($this->getContainerParametersDocument($parameters));
     }
@@ -57,7 +57,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerTags(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerTags(ContainerBuilder $builder, array $options = [])
     {
         $this->writeDocument($this->getContainerTagsDocument($builder, isset($options['show_hidden']) && $options['show_hidden']));
     }
@@ -65,7 +65,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerService($service, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
@@ -77,7 +77,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerServices(ContainerBuilder $builder, array $options = array())
+    protected function describeContainerServices(ContainerBuilder $builder, array $options = [])
     {
         $this->writeDocument($this->getContainerServicesDocument($builder, isset($options['tag']) ? $options['tag'] : null, isset($options['show_hidden']) && $options['show_hidden'], isset($options['show_arguments']) && $options['show_arguments'], isset($options['filter']) ? $options['filter'] : null));
     }
@@ -85,7 +85,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerDefinition(Definition $definition, array $options = array())
+    protected function describeContainerDefinition(Definition $definition, array $options = [])
     {
         $this->writeDocument($this->getContainerDefinitionDocument($definition, isset($options['id']) ? $options['id'] : null, isset($options['omit_tags']) && $options['omit_tags'], isset($options['show_arguments']) && $options['show_arguments']));
     }
@@ -93,7 +93,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerAlias(Alias $alias, array $options = array(), ContainerBuilder $builder = null)
+    protected function describeContainerAlias(Alias $alias, array $options = [], ContainerBuilder $builder = null)
     {
         $dom = new \DOMDocument('1.0', 'UTF-8');
         $dom->appendChild($dom->importNode($this->getContainerAliasDocument($alias, isset($options['id']) ? $options['id'] : null)->childNodes->item(0), true));
@@ -110,7 +110,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = array())
+    protected function describeEventDispatcherListeners(EventDispatcherInterface $eventDispatcher, array $options = [])
     {
         $this->writeDocument($this->getEventDispatcherListenersDocument($eventDispatcher, array_key_exists('event', $options) ? $options['event'] : null));
     }
@@ -118,7 +118,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCallable($callable, array $options = array())
+    protected function describeCallable($callable, array $options = [])
     {
         $this->writeDocument($this->getCallableDocument($callable));
     }
@@ -126,7 +126,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeContainerParameter($parameter, array $options = array())
+    protected function describeContainerParameter($parameter, array $options = [])
     {
         $this->writeDocument($this->getContainerParameterDocument($parameter, $options));
     }
@@ -377,7 +377,7 @@ class XmlDescriptor extends Descriptor
      */
     private function getArgumentNodes(array $arguments, \DOMDocument $dom)
     {
-        $nodes = array();
+        $nodes = [];
 
         foreach ($arguments as $argumentKey => $argument) {
             $argumentXML = $dom->createElement('argument');
@@ -432,7 +432,7 @@ class XmlDescriptor extends Descriptor
         return $dom;
     }
 
-    private function getContainerParameterDocument($parameter, $options = array()): \DOMDocument
+    private function getContainerParameterDocument($parameter, $options = []): \DOMDocument
     {
         $dom = new \DOMDocument('1.0', 'UTF-8');
         $dom->appendChild($parameterXML = $dom->createElement('parameter'));
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php b/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
index 5143dfd173..a8b83f1e8b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
@@ -65,7 +65,7 @@ abstract class AbstractController implements ServiceSubscriberInterface
     protected function getParameter(string $name)
     {
         if (!$this->container->has('parameter_bag')) {
-            throw new ServiceNotFoundException('parameter_bag', null, null, array(), sprintf('The "%s::getParameter()" method is missing a parameter bag to work properly. Did you forget to register your controller as a service subscriber? This can be fixed either by using autoconfiguration or by manually wiring a "parameter_bag" in the service locator passed to the controller.', \get_class($this)));
+            throw new ServiceNotFoundException('parameter_bag', null, null, [], sprintf('The "%s::getParameter()" method is missing a parameter bag to work properly. Did you forget to register your controller as a service subscriber? This can be fixed either by using autoconfiguration or by manually wiring a "parameter_bag" in the service locator passed to the controller.', \get_class($this)));
         }
 
         return $this->container->get('parameter_bag')->get($name);
@@ -73,7 +73,7 @@ abstract class AbstractController implements ServiceSubscriberInterface
 
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'router' => '?'.RouterInterface::class,
             'request_stack' => '?'.RequestStack::class,
             'http_kernel' => '?'.HttpKernelInterface::class,
@@ -88,6 +88,6 @@ abstract class AbstractController implements ServiceSubscriberInterface
             'security.csrf.token_manager' => '?'.CsrfTokenManagerInterface::class,
             'parameter_bag' => '?'.ContainerBagInterface::class,
             'message_bus' => '?'.MessageBusInterface::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php b/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
index 8ad78f9f85..d669771a59 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/RedirectController.php
@@ -60,7 +60,7 @@ class RedirectController
             throw new HttpException($permanent ? 410 : 404);
         }
 
-        $attributes = array();
+        $attributes = [];
         if (false === $ignoreAttributes || \is_array($ignoreAttributes)) {
             $attributes = $request->attributes->get('_route_params');
             $attributes = $keepQueryParams ? array_merge($request->query->all(), $attributes) : $attributes;
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddDebugLogProcessorPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddDebugLogProcessorPass.php
index 69038cf92f..b4da145010 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddDebugLogProcessorPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddDebugLogProcessorPass.php
@@ -30,6 +30,6 @@ class AddDebugLogProcessorPass implements CompilerPassInterface
         }
 
         $definition = $container->getDefinition('monolog.logger_prototype');
-        $definition->addMethodCall('pushProcessor', array(new Reference('debug.log_processor')));
+        $definition->addMethodCall('pushProcessor', [new Reference('debug.log_processor')]);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
index b1bc914f18..7c6c85f64b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
@@ -43,7 +43,7 @@ class AddExpressionLanguageProvidersPass implements CompilerPassInterface
         if ($container->has('router')) {
             $definition = $container->findDefinition('router');
             foreach ($container->findTaggedServiceIds('routing.expression_language_provider', true) as $id => $attributes) {
-                $definition->addMethodCall('addExpressionLanguageProvider', array(new Reference($id)));
+                $definition->addMethodCall('addExpressionLanguageProvider', [new Reference($id)]);
             }
         }
 
@@ -51,7 +51,7 @@ class AddExpressionLanguageProvidersPass implements CompilerPassInterface
         if ($this->handleSecurityLanguageProviders && $container->has('security.expression_language')) {
             $definition = $container->findDefinition('security.expression_language');
             foreach ($container->findTaggedServiceIds('security.expression_language_provider', true) as $id => $attributes) {
-                $definition->addMethodCall('registerProvider', array(new Reference($id)));
+                $definition->addMethodCall('registerProvider', [new Reference($id)]);
             }
         }
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/LoggingTranslatorPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/LoggingTranslatorPass.php
index 787060b6a4..80cbe52e6c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/LoggingTranslatorPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/LoggingTranslatorPass.php
@@ -47,7 +47,7 @@ class LoggingTranslatorPass implements CompilerPassInterface
                         $warmer->addTag('container.service_subscriber', $v);
                     }
                 }
-                $warmer->addTag('container.service_subscriber', array('key' => 'translator', 'id' => 'translator.logging.inner'));
+                $warmer->addTag('container.service_subscriber', ['key' => 'translator', 'id' => 'translator.logging.inner']);
             }
         }
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ProfilerPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ProfilerPass.php
index 8e15979a90..357c079c4a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ProfilerPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ProfilerPass.php
@@ -41,15 +41,15 @@ class ProfilerPass implements CompilerPassInterface
                 if (!isset($attributes[0]['id'])) {
                     throw new InvalidArgumentException(sprintf('Data collector service "%s" must have an id attribute in order to specify a template', $id));
                 }
-                $template = array($attributes[0]['id'], $attributes[0]['template']);
+                $template = [$attributes[0]['id'], $attributes[0]['template']];
             }
 
-            $collectors->insert(array($id, $template), array($priority, --$order));
+            $collectors->insert([$id, $template], [$priority, --$order]);
         }
 
-        $templates = array();
+        $templates = [];
         foreach ($collectors as $collector) {
-            $definition->addMethodCall('add', array(new Reference($collector[0])));
+            $definition->addMethodCall('add', [new Reference($collector[0])]);
             $templates[$collector[0]] = $collector[1];
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
index 8de51211d3..4eff0b6c8e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TemplatingPass.php
@@ -32,8 +32,8 @@ class TemplatingPass implements CompilerPassInterface
         }
 
         if ($container->hasDefinition('templating.engine.php')) {
-            $refs = array();
-            $helpers = array();
+            $refs = [];
+            $helpers = [];
             foreach ($container->findTaggedServiceIds('templating.helper', true) as $id => $attributes) {
                 if (isset($attributes[0]['alias'])) {
                     $helpers[$attributes[0]['alias']] = $id;
@@ -43,7 +43,7 @@ class TemplatingPass implements CompilerPassInterface
 
             if (\count($helpers) > 0) {
                 $definition = $container->getDefinition('templating.engine.php');
-                $definition->addMethodCall('setHelpers', array($helpers));
+                $definition->addMethodCall('setHelpers', [$helpers]);
 
                 if ($container->hasDefinition('templating.engine.php.helpers_locator')) {
                     $container->getDefinition('templating.engine.php.helpers_locator')->replaceArgument(0, $refs);
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerRealRefPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerRealRefPass.php
index a4eaa9fbe3..222b5c7b75 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerRealRefPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerRealRefPass.php
@@ -32,7 +32,7 @@ class TestServiceContainerRealRefPass implements CompilerPassInterface
 
         foreach ($privateServices as $id => $argument) {
             if (isset($definitions[$target = (string) $argument->getValues()[0]])) {
-                $argument->setValues(array(new Reference($target)));
+                $argument->setValues([new Reference($target)]);
             } else {
                 unset($privateServices[$id]);
             }
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerWeakRefPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerWeakRefPass.php
index f264ba44dd..57aa592a32 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerWeakRefPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/TestServiceContainerWeakRefPass.php
@@ -28,7 +28,7 @@ class TestServiceContainerWeakRefPass implements CompilerPassInterface
             return;
         }
 
-        $privateServices = array();
+        $privateServices = [];
         $definitions = $container->getDefinitions();
         $hasErrors = method_exists(Definition::class, 'hasErrors') ? 'hasErrors' : 'getErrors';
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
index d9e7f866cd..46004cd923 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php
@@ -21,7 +21,7 @@ use Symfony\Component\DependencyInjection\ContainerBuilder;
  */
 class UnusedTagsPass implements CompilerPassInterface
 {
-    private $whitelist = array(
+    private $whitelist = [
         'annotations.cached_reader',
         'cache.pool.clearer',
         'console.command',
@@ -59,7 +59,7 @@ class UnusedTagsPass implements CompilerPassInterface
         'twig.loader',
         'validator.constraint_validator',
         'validator.initializer',
-    );
+    ];
 
     public function process(ContainerBuilder $container)
     {
@@ -72,7 +72,7 @@ class UnusedTagsPass implements CompilerPassInterface
             }
 
             // check for typos
-            $candidates = array();
+            $candidates = [];
             foreach ($tags as $definedTag) {
                 if ($definedTag === $tag) {
                     continue;
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/WorkflowGuardListenerPass.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/WorkflowGuardListenerPass.php
index c5498adc47..ad62e19384 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/WorkflowGuardListenerPass.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/WorkflowGuardListenerPass.php
@@ -32,12 +32,12 @@ class WorkflowGuardListenerPass implements CompilerPassInterface
 
         $container->getParameterBag()->remove('workflow.has_guard_listeners');
 
-        $servicesNeeded = array(
+        $servicesNeeded = [
             'security.token_storage',
             'security.authorization_checker',
             'security.authentication.trust_resolver',
             'security.role_hierarchy',
-        );
+        ];
 
         foreach ($servicesNeeded as $service) {
             if (!$container->has($service)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 12f2092320..1a8d6fb461 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -64,7 +64,7 @@ class Configuration implements ConfigurationInterface
             ->beforeNormalization()
                 ->ifTrue(function ($v) { return !isset($v['assets']) && isset($v['templating']) && class_exists(Package::class); })
                 ->then(function ($v) {
-                    $v['assets'] = array();
+                    $v['assets'] = [];
 
                     return $v;
                 })
@@ -79,7 +79,7 @@ class Configuration implements ConfigurationInterface
                 ->booleanNode('test')->end()
                 ->scalarNode('default_locale')->defaultValue('en')->end()
                 ->arrayNode('trusted_hosts')
-                    ->beforeNormalization()->ifString()->then(function ($v) { return array($v); })->end()
+                    ->beforeNormalization()->ifString()->then(function ($v) { return [$v]; })->end()
                     ->prototype('scalar')->end()
                 ->end()
             ->end()
@@ -117,9 +117,9 @@ class Configuration implements ConfigurationInterface
         $rootNode
             ->children()
                 ->arrayNode('csrf_protection')
-                    ->treatFalseLike(array('enabled' => false))
-                    ->treatTrueLike(array('enabled' => true))
-                    ->treatNullLike(array('enabled' => true))
+                    ->treatFalseLike(['enabled' => false])
+                    ->treatTrueLike(['enabled' => true])
+                    ->treatNullLike(['enabled' => true])
                     ->addDefaultsIfNotSet()
                     ->children()
                         // defaults to framework.session.enabled && !class_exists(FullStack::class) && interface_exists(CsrfTokenManagerInterface::class)
@@ -139,9 +139,9 @@ class Configuration implements ConfigurationInterface
                     ->{!class_exists(FullStack::class) && class_exists(Form::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                     ->children()
                         ->arrayNode('csrf_protection')
-                            ->treatFalseLike(array('enabled' => false))
-                            ->treatTrueLike(array('enabled' => true))
-                            ->treatNullLike(array('enabled' => true))
+                            ->treatFalseLike(['enabled' => false])
+                            ->treatTrueLike(['enabled' => true])
+                            ->treatNullLike(['enabled' => true])
                             ->addDefaultsIfNotSet()
                             ->children()
                                 ->booleanNode('enabled')->defaultNull()->end() // defaults to framework.csrf_protection.enabled
@@ -224,10 +224,10 @@ class Configuration implements ConfigurationInterface
                                 unset($workflows['enabled']);
 
                                 if (1 === \count($workflows) && isset($workflows[0]['enabled']) && 1 === \count($workflows[0])) {
-                                    $workflows = array();
+                                    $workflows = [];
                                 }
 
-                                if (1 === \count($workflows) && isset($workflows['workflows']) && array_keys($workflows['workflows']) !== range(0, \count($workflows) - 1) && !empty(array_diff(array_keys($workflows['workflows']), array('audit_trail', 'type', 'marking_store', 'supports', 'support_strategy', 'initial_place', 'places', 'transitions')))) {
+                                if (1 === \count($workflows) && isset($workflows['workflows']) && array_keys($workflows['workflows']) !== range(0, \count($workflows) - 1) && !empty(array_diff(array_keys($workflows['workflows']), ['audit_trail', 'type', 'marking_store', 'supports', 'support_strategy', 'initial_place', 'places', 'transitions']))) {
                                     $workflows = $workflows['workflows'];
                                 }
 
@@ -239,10 +239,10 @@ class Configuration implements ConfigurationInterface
                                     unset($workflows[$key]['enabled']);
                                 }
 
-                                $v = array(
+                                $v = [
                                     'enabled' => true,
                                     'workflows' => $workflows,
-                                );
+                                ];
                             }
 
                             return $v;
@@ -260,19 +260,19 @@ class Configuration implements ConfigurationInterface
                                         ->canBeEnabled()
                                     ->end()
                                     ->enumNode('type')
-                                        ->values(array('workflow', 'state_machine'))
+                                        ->values(['workflow', 'state_machine'])
                                         ->defaultValue('state_machine')
                                     ->end()
                                     ->arrayNode('marking_store')
                                         ->fixXmlConfig('argument')
                                         ->children()
                                             ->enumNode('type')
-                                                ->values(array('multiple_state', 'single_state'))
+                                                ->values(['multiple_state', 'single_state'])
                                             ->end()
                                             ->arrayNode('arguments')
                                                 ->beforeNormalization()
                                                     ->ifString()
-                                                    ->then(function ($v) { return array($v); })
+                                                    ->then(function ($v) { return [$v]; })
                                                 ->end()
                                                 ->requiresAtLeastOneElement()
                                                 ->prototype('scalar')
@@ -294,7 +294,7 @@ class Configuration implements ConfigurationInterface
                                     ->arrayNode('supports')
                                         ->beforeNormalization()
                                             ->ifString()
-                                            ->then(function ($v) { return array($v); })
+                                            ->then(function ($v) { return [$v]; })
                                         ->end()
                                         ->prototype('scalar')
                                             ->cannotBeEmpty()
@@ -317,7 +317,7 @@ class Configuration implements ConfigurationInterface
                                                 // It's an indexed array of shape  ['place1', 'place2']
                                                 if (isset($places[0]) && \is_string($places[0])) {
                                                     return array_map(function (string $place) {
-                                                        return array('name' => $place);
+                                                        return ['name' => $place];
                                                     }, $places);
                                                 }
 
@@ -347,8 +347,8 @@ class Configuration implements ConfigurationInterface
                                                 ->end()
                                                 ->arrayNode('metadata')
                                                     ->normalizeKeys(false)
-                                                    ->defaultValue(array())
-                                                    ->example(array('color' => 'blue', 'description' => 'Workflow to manage article.'))
+                                                    ->defaultValue([])
+                                                    ->example(['color' => 'blue', 'description' => 'Workflow to manage article.'])
                                                     ->prototype('variable')
                                                     ->end()
                                                 ->end()
@@ -391,7 +391,7 @@ class Configuration implements ConfigurationInterface
                                                 ->arrayNode('from')
                                                     ->beforeNormalization()
                                                         ->ifString()
-                                                        ->then(function ($v) { return array($v); })
+                                                        ->then(function ($v) { return [$v]; })
                                                     ->end()
                                                     ->requiresAtLeastOneElement()
                                                     ->prototype('scalar')
@@ -401,7 +401,7 @@ class Configuration implements ConfigurationInterface
                                                 ->arrayNode('to')
                                                     ->beforeNormalization()
                                                         ->ifString()
-                                                        ->then(function ($v) { return array($v); })
+                                                        ->then(function ($v) { return [$v]; })
                                                     ->end()
                                                     ->requiresAtLeastOneElement()
                                                     ->prototype('scalar')
@@ -410,8 +410,8 @@ class Configuration implements ConfigurationInterface
                                                 ->end()
                                                 ->arrayNode('metadata')
                                                     ->normalizeKeys(false)
-                                                    ->defaultValue(array())
-                                                    ->example(array('color' => 'blue', 'description' => 'Workflow to manage article.'))
+                                                    ->defaultValue([])
+                                                    ->example(['color' => 'blue', 'description' => 'Workflow to manage article.'])
                                                     ->prototype('variable')
                                                     ->end()
                                                 ->end()
@@ -420,8 +420,8 @@ class Configuration implements ConfigurationInterface
                                     ->end()
                                     ->arrayNode('metadata')
                                         ->normalizeKeys(false)
-                                        ->defaultValue(array())
-                                        ->example(array('color' => 'blue', 'description' => 'Workflow to manage article.'))
+                                        ->defaultValue([])
+                                        ->example(['color' => 'blue', 'description' => 'Workflow to manage article.'])
                                         ->prototype('variable')
                                         ->end()
                                     ->end()
@@ -497,9 +497,9 @@ class Configuration implements ConfigurationInterface
                         ->scalarNode('cookie_lifetime')->end()
                         ->scalarNode('cookie_path')->end()
                         ->scalarNode('cookie_domain')->end()
-                        ->enumNode('cookie_secure')->values(array(true, false, 'auto'))->end()
+                        ->enumNode('cookie_secure')->values([true, false, 'auto'])->end()
                         ->booleanNode('cookie_httponly')->defaultTrue()->end()
-                        ->enumNode('cookie_samesite')->values(array(null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT))->defaultNull()->end()
+                        ->enumNode('cookie_samesite')->values([null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT])->defaultNull()->end()
                         ->booleanNode('use_cookies')->end()
                         ->scalarNode('gc_divisor')->end()
                         ->scalarNode('gc_probability')->defaultValue(1)->end()
@@ -533,7 +533,7 @@ class Configuration implements ConfigurationInterface
                                 ->end()
                                 ->beforeNormalization()
                                     ->ifTrue(function ($v) { return !\is_array($v); })
-                                    ->then(function ($v) { return array($v); })
+                                    ->then(function ($v) { return [$v]; })
                                 ->end()
                                 ->prototype('scalar')->end()
                             ->end()
@@ -553,7 +553,7 @@ class Configuration implements ConfigurationInterface
                     ->canBeEnabled()
                     ->beforeNormalization()
                         ->ifTrue(function ($v) { return false === $v || \is_array($v) && false === $v['enabled']; })
-                        ->then(function () { return array('enabled' => false, 'engines' => false); })
+                        ->then(function () { return ['enabled' => false, 'engines' => false]; })
                     ->end()
                     ->children()
                         ->scalarNode('hinclude_default_template')->defaultNull()->end()
@@ -568,7 +568,7 @@ class Configuration implements ConfigurationInterface
                                     ->validate()
                                         ->ifTrue(function ($v) {return !\in_array('FrameworkBundle:Form', $v); })
                                         ->then(function ($v) {
-                                            return array_merge(array('FrameworkBundle:Form'), $v);
+                                            return array_merge(['FrameworkBundle:Form'], $v);
                                         })
                                     ->end()
                                 ->end()
@@ -578,13 +578,13 @@ class Configuration implements ConfigurationInterface
                     ->fixXmlConfig('engine')
                     ->children()
                         ->arrayNode('engines')
-                            ->example(array('twig'))
+                            ->example(['twig'])
                             ->isRequired()
                             ->requiresAtLeastOneElement()
                             ->canBeUnset()
                             ->beforeNormalization()
                                 ->ifTrue(function ($v) { return !\is_array($v) && false !== $v; })
-                                ->then(function ($v) { return array($v); })
+                                ->then(function ($v) { return [$v]; })
                             ->end()
                             ->prototype('scalar')->end()
                         ->end()
@@ -594,7 +594,7 @@ class Configuration implements ConfigurationInterface
                         ->arrayNode('loaders')
                             ->beforeNormalization()
                                 ->ifTrue(function ($v) { return !\is_array($v); })
-                                ->then(function ($v) { return array($v); })
+                                ->then(function ($v) { return [$v]; })
                              ->end()
                             ->prototype('scalar')->end()
                         ->end()
@@ -622,7 +622,7 @@ class Configuration implements ConfigurationInterface
                             ->requiresAtLeastOneElement()
                             ->beforeNormalization()
                                 ->ifTrue(function ($v) { return !\is_array($v); })
-                                ->then(function ($v) { return array($v); })
+                                ->then(function ($v) { return [$v]; })
                             ->end()
                             ->prototype('scalar')->end()
                         ->end()
@@ -666,7 +666,7 @@ class Configuration implements ConfigurationInterface
                                         ->requiresAtLeastOneElement()
                                         ->beforeNormalization()
                                             ->ifTrue(function ($v) { return !\is_array($v); })
-                                            ->then(function ($v) { return array($v); })
+                                            ->then(function ($v) { return [$v]; })
                                         ->end()
                                         ->prototype('scalar')->end()
                                     ->end()
@@ -708,9 +708,9 @@ class Configuration implements ConfigurationInterface
                     ->fixXmlConfig('path')
                     ->children()
                         ->arrayNode('fallbacks')
-                            ->beforeNormalization()->ifString()->then(function ($v) { return array($v); })->end()
+                            ->beforeNormalization()->ifString()->then(function ($v) { return [$v]; })->end()
                             ->prototype('scalar')->end()
-                            ->defaultValue(array('en'))
+                            ->defaultValue(['en'])
                         ->end()
                         ->booleanNode('logging')->defaultValue(false)->end()
                         ->scalarNode('formatter')->defaultValue('translator.formatter.default')->end()
@@ -759,9 +759,9 @@ class Configuration implements ConfigurationInterface
                         ->scalarNode('cache')->end()
                         ->booleanNode('enable_annotations')->{!class_exists(FullStack::class) && class_exists(Annotation::class) ? 'defaultTrue' : 'defaultFalse'}()->end()
                         ->arrayNode('static_method')
-                            ->defaultValue(array('loadValidatorMetadata'))
+                            ->defaultValue(['loadValidatorMetadata'])
                             ->prototype('scalar')->end()
-                            ->treatFalseLike(array())
+                            ->treatFalseLike([])
                             ->validate()
                                 ->ifTrue(function ($v) { return !\is_array($v); })
                                 ->then(function ($v) { return (array) $v; })
@@ -769,7 +769,7 @@ class Configuration implements ConfigurationInterface
                         ->end()
                         ->scalarNode('translation_domain')->defaultValue('validators')->end()
                         ->booleanNode('strict_email')->end()
-                        ->enumNode('email_validation_mode')->values(array('html5', 'loose', 'strict'))->end()
+                        ->enumNode('email_validation_mode')->values(['html5', 'loose', 'strict'])->end()
                         ->arrayNode('mapping')
                             ->addDefaultsIfNotSet()
                             ->fixXmlConfig('path')
@@ -946,7 +946,7 @@ class Configuration implements ConfigurationInterface
                     ->info('Lock configuration')
                     ->{!class_exists(FullStack::class) && class_exists(Lock::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                     ->beforeNormalization()
-                        ->ifString()->then(function ($v) { return array('enabled' => true, 'resources' => $v); })
+                        ->ifString()->then(function ($v) { return ['enabled' => true, 'resources' => $v]; })
                     ->end()
                     ->beforeNormalization()
                         ->ifTrue(function ($v) { return \is_array($v) && !isset($v['resources']); })
@@ -954,7 +954,7 @@ class Configuration implements ConfigurationInterface
                             $e = $v['enabled'];
                             unset($v['enabled']);
 
-                            return array('enabled' => $e, 'resources' => $v);
+                            return ['enabled' => $e, 'resources' => $v];
                         })
                     ->end()
                     ->addDefaultsIfNotSet()
@@ -962,16 +962,16 @@ class Configuration implements ConfigurationInterface
                     ->children()
                         ->arrayNode('resources')
                             ->requiresAtLeastOneElement()
-                            ->defaultValue(array('default' => array(class_exists(SemaphoreStore::class) && SemaphoreStore::isSupported() ? 'semaphore' : 'flock')))
+                            ->defaultValue(['default' => [class_exists(SemaphoreStore::class) && SemaphoreStore::isSupported() ? 'semaphore' : 'flock']])
                             ->beforeNormalization()
-                                ->ifString()->then(function ($v) { return array('default' => $v); })
+                                ->ifString()->then(function ($v) { return ['default' => $v]; })
                             ->end()
                             ->beforeNormalization()
                                 ->ifTrue(function ($v) { return \is_array($v) && array_keys($v) === range(0, \count($v) - 1); })
-                                ->then(function ($v) { return array('default' => $v); })
+                                ->then(function ($v) { return ['default' => $v]; })
                             ->end()
                             ->prototype('array')
-                                ->beforeNormalization()->ifString()->then(function ($v) { return array($v); })->end()
+                                ->beforeNormalization()->ifString()->then(function ($v) { return [$v]; })->end()
                                 ->prototype('scalar')->end()
                             ->end()
                         ->end()
@@ -1009,16 +1009,16 @@ class Configuration implements ConfigurationInterface
                                 ->always()
                                 ->then(function ($config) {
                                     if (!\is_array($config)) {
-                                        return array();
+                                        return [];
                                     }
 
-                                    $newConfig = array();
+                                    $newConfig = [];
                                     foreach ($config as $k => $v) {
                                         if (!\is_int($k)) {
-                                            $newConfig[$k] = array(
-                                                'senders' => $v['senders'] ?? (\is_array($v) ? array_values($v) : array($v)),
+                                            $newConfig[$k] = [
+                                                'senders' => $v['senders'] ?? (\is_array($v) ? array_values($v) : [$v]),
                                                 'send_and_handle' => $v['send_and_handle'] ?? false,
-                                            );
+                                            ];
                                         } else {
                                             $newConfig[$v['message-class']]['senders'] = array_map(
                                                 function ($a) {
@@ -1049,11 +1049,11 @@ class Configuration implements ConfigurationInterface
                                 ->always()
                                 ->then(function ($config) {
                                     if (false === $config) {
-                                        return array('id' => null);
+                                        return ['id' => null];
                                     }
 
                                     if (\is_string($config)) {
-                                        return array('id' => $config);
+                                        return ['id' => $config];
                                     }
 
                                     return $config;
@@ -1065,7 +1065,7 @@ class Configuration implements ConfigurationInterface
                                 ->arrayNode('context')
                                     ->normalizeKeys(false)
                                     ->useAttributeAsKey('name')
-                                    ->defaultValue(array())
+                                    ->defaultValue([])
                                     ->prototype('variable')->end()
                                 ->end()
                             ->end()
@@ -1076,7 +1076,7 @@ class Configuration implements ConfigurationInterface
                                 ->beforeNormalization()
                                     ->ifString()
                                     ->then(function (string $dsn) {
-                                        return array('dsn' => $dsn);
+                                        return ['dsn' => $dsn];
                                     })
                                 ->end()
                                 ->fixXmlConfig('option')
@@ -1084,7 +1084,7 @@ class Configuration implements ConfigurationInterface
                                     ->scalarNode('dsn')->end()
                                     ->arrayNode('options')
                                         ->normalizeKeys(false)
-                                        ->defaultValue(array())
+                                        ->defaultValue([])
                                         ->prototype('variable')
                                         ->end()
                                     ->end()
@@ -1093,27 +1093,27 @@ class Configuration implements ConfigurationInterface
                         ->end()
                         ->scalarNode('default_bus')->defaultNull()->end()
                         ->arrayNode('buses')
-                            ->defaultValue(array('messenger.bus.default' => array('default_middleware' => true, 'middleware' => array())))
+                            ->defaultValue(['messenger.bus.default' => ['default_middleware' => true, 'middleware' => []]])
                             ->useAttributeAsKey('name')
                             ->arrayPrototype()
                                 ->addDefaultsIfNotSet()
                                 ->children()
                                     ->enumNode('default_middleware')
-                                        ->values(array(true, false, 'allow_no_handlers'))
+                                        ->values([true, false, 'allow_no_handlers'])
                                         ->defaultTrue()
                                     ->end()
                                     ->arrayNode('middleware')
                                         ->beforeNormalization()
                                             ->ifTrue(function ($v) { return \is_string($v) || (\is_array($v) && !\is_int(key($v))); })
-                                            ->then(function ($v) { return array($v); })
+                                            ->then(function ($v) { return [$v]; })
                                         ->end()
-                                        ->defaultValue(array())
+                                        ->defaultValue([])
                                         ->arrayPrototype()
                                             ->beforeNormalization()
                                                 ->always()
                                                 ->then(function ($middleware): array {
                                                     if (!\is_array($middleware)) {
-                                                        return array('id' => $middleware);
+                                                        return ['id' => $middleware];
                                                     }
                                                     if (isset($middleware['id'])) {
                                                         return $middleware;
@@ -1122,10 +1122,10 @@ class Configuration implements ConfigurationInterface
                                                         throw new \InvalidArgumentException(sprintf('Invalid middleware at path "framework.messenger": a map with a single factory id as key and its arguments as value was expected, %s given.', json_encode($middleware)));
                                                     }
 
-                                                    return array(
+                                                    return [
                                                         'id' => key($middleware),
                                                         'arguments' => current($middleware),
-                                                    );
+                                                    ];
                                                 })
                                             ->end()
                                             ->fixXmlConfig('argument')
@@ -1133,7 +1133,7 @@ class Configuration implements ConfigurationInterface
                                                 ->scalarNode('id')->isRequired()->cannotBeEmpty()->end()
                                                 ->arrayNode('arguments')
                                                     ->normalizeKeys(false)
-                                                    ->defaultValue(array())
+                                                    ->defaultValue([])
                                                     ->prototype('variable')
                                                 ->end()
                                             ->end()
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index 5355bd4b32..9f1889b033 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -181,7 +181,7 @@ class FrameworkExtension extends Extension
 
         if (!$container->hasParameter('debug.file_link_format')) {
             if (!$container->hasParameter('templating.helper.code.file_link_format')) {
-                $links = array(
+                $links = [
                     'textmate' => 'txmt://open?url=file://%%f&line=%%l',
                     'macvim' => 'mvim://open?url=file://%%f&line=%%l',
                     'emacs' => 'emacs://open?url=file://%%f&line=%%l',
@@ -189,7 +189,7 @@ class FrameworkExtension extends Extension
                     'phpstorm' => 'phpstorm://open?file=%%f&line=%%l',
                     'atom' => 'atom://core/open/file?filename=%%f&line=%%l',
                     'vscode' => 'vscode://file/%%f:%%l',
-                );
+                ];
                 $ide = $config['ide'];
 
                 $container->setParameter('templating.helper.code.file_link_format', str_replace('%', '%%', ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format')) ?: (isset($links[$ide]) ? $links[$ide] : $ide));
@@ -302,13 +302,13 @@ class FrameworkExtension extends Extension
             $loader->load('web_link.xml');
         }
 
-        $this->addAnnotatedClassesToCompile(array(
+        $this->addAnnotatedClassesToCompile([
             '**\\Controller\\',
             '**\\Entity\\',
 
             // Added explicitly so that we don't rely on the class map being dumped to make it work
             'Symfony\\Bundle\\FrameworkBundle\\Controller\\AbstractController',
-        ));
+        ]);
 
         $container->registerForAutoconfiguration(Command::class)
             ->addTag('console.command');
@@ -341,11 +341,11 @@ class FrameworkExtension extends Extension
         $container->registerForAutoconfiguration(EventSubscriberInterface::class)
             ->addTag('kernel.event_subscriber');
         $container->registerForAutoconfiguration(ResetInterface::class)
-            ->addTag('kernel.reset', array('method' => 'reset'));
+            ->addTag('kernel.reset', ['method' => 'reset']);
 
         if (!interface_exists(MarshallerInterface::class)) {
             $container->registerForAutoconfiguration(ResettableInterface::class)
-                ->addTag('kernel.reset', array('method' => 'reset'));
+                ->addTag('kernel.reset', ['method' => 'reset']);
         }
 
         $container->registerForAutoconfiguration(PropertyListExtractorInterface::class)
@@ -375,11 +375,11 @@ class FrameworkExtension extends Extension
         $container->registerForAutoconfiguration(TransportFactoryInterface::class)
             ->addTag('messenger.transport_factory');
         $container->registerForAutoconfiguration(LoggerAwareInterface::class)
-            ->addMethodCall('setLogger', array(new Reference('logger')));
+            ->addMethodCall('setLogger', [new Reference('logger')]);
 
         if (!$container->getParameter('kernel.debug')) {
             // remove tagged iterator argument for resource checkers
-            $container->getDefinition('config_cache_factory')->setArguments(array());
+            $container->getDefinition('config_cache_factory')->setArguments([]);
         }
     }
 
@@ -451,7 +451,7 @@ class FrameworkExtension extends Extension
     {
         if (!$this->isConfigEnabled($container, $config)) {
             // this is needed for the WebProfiler to work even if the profiler is disabled
-            $container->setParameter('data_collector.templates', array());
+            $container->setParameter('data_collector.templates', []);
 
             return;
         }
@@ -491,7 +491,7 @@ class FrameworkExtension extends Extension
 
         $container->getDefinition('profiler')
             ->addArgument($config['collect'])
-            ->addTag('kernel.reset', array('method' => 'reset'));
+            ->addTag('kernel.reset', ['method' => 'reset']);
     }
 
     private function registerWorkflowConfiguration(array $config, ContainerBuilder $container, XmlFileLoader $loader)
@@ -515,11 +515,11 @@ class FrameworkExtension extends Extension
             $workflowId = sprintf('%s.%s', $type, $name);
 
             // Process Metadata (workflow + places (transition is done in the "create transition" block))
-            $metadataStoreDefinition = new Definition(Workflow\Metadata\InMemoryMetadataStore::class, array(array(), array(), null));
+            $metadataStoreDefinition = new Definition(Workflow\Metadata\InMemoryMetadataStore::class, [[], [], null]);
             if ($workflow['metadata']) {
                 $metadataStoreDefinition->replaceArgument(0, $workflow['metadata']);
             }
-            $placesMetadata = array();
+            $placesMetadata = [];
             foreach ($workflow['places'] as $place) {
                 if ($place['metadata']) {
                     $placesMetadata[$place['name']] = $place['metadata'];
@@ -530,14 +530,14 @@ class FrameworkExtension extends Extension
             }
 
             // Create transitions
-            $transitions = array();
-            $guardsConfiguration = array();
+            $transitions = [];
+            $guardsConfiguration = [];
             $transitionsMetadataDefinition = new Definition(\SplObjectStorage::class);
             // Global transition counter per workflow
             $transitionCounter = 0;
             foreach ($workflow['transitions'] as $transition) {
                 if ('workflow' === $type) {
-                    $transitionDefinition = new Definition(Workflow\Transition::class, array($transition['name'], $transition['from'], $transition['to']));
+                    $transitionDefinition = new Definition(Workflow\Transition::class, [$transition['name'], $transition['from'], $transition['to']]);
                     $transitionDefinition->setPublic(false);
                     $transitionId = sprintf('%s.transition.%s', $workflowId, $transitionCounter++);
                     $container->setDefinition($transitionId, $transitionDefinition);
@@ -551,15 +551,15 @@ class FrameworkExtension extends Extension
                         $guardsConfiguration[$eventName][] = $configuration;
                     }
                     if ($transition['metadata']) {
-                        $transitionsMetadataDefinition->addMethodCall('attach', array(
+                        $transitionsMetadataDefinition->addMethodCall('attach', [
                             new Reference($transitionId),
                             $transition['metadata'],
-                        ));
+                        ]);
                     }
                 } elseif ('state_machine' === $type) {
                     foreach ($transition['from'] as $from) {
                         foreach ($transition['to'] as $to) {
-                            $transitionDefinition = new Definition(Workflow\Transition::class, array($transition['name'], $from, $to));
+                            $transitionDefinition = new Definition(Workflow\Transition::class, [$transition['name'], $from, $to]);
                             $transitionDefinition->setPublic(false);
                             $transitionId = sprintf('%s.transition.%s', $workflowId, $transitionCounter++);
                             $container->setDefinition($transitionId, $transitionDefinition);
@@ -573,10 +573,10 @@ class FrameworkExtension extends Extension
                                 $guardsConfiguration[$eventName][] = $configuration;
                             }
                             if ($transition['metadata']) {
-                                $transitionsMetadataDefinition->addMethodCall('attach', array(
+                                $transitionsMetadataDefinition->addMethodCall('attach', [
                                     new Reference($transitionId),
                                     $transition['metadata'],
-                                ));
+                                ]);
                             }
                         }
                     }
@@ -594,11 +594,11 @@ class FrameworkExtension extends Extension
             $definitionDefinition->addArgument($transitions);
             $definitionDefinition->addArgument($workflow['initial_place'] ?? null);
             $definitionDefinition->addArgument($metadataStoreDefinition);
-            $definitionDefinition->addTag('workflow.definition', array(
+            $definitionDefinition->addTag('workflow.definition', [
                 'name' => $name,
                 'type' => $type,
                 'marking_store' => isset($workflow['marking_store']['type']) ? $workflow['marking_store']['type'] : null,
-            ));
+            ]);
 
             // Create MarkingStore
             if (isset($workflow['marking_store']['type'])) {
@@ -626,22 +626,22 @@ class FrameworkExtension extends Extension
             // Add workflow to Registry
             if ($workflow['supports']) {
                 foreach ($workflow['supports'] as $supportedClassName) {
-                    $strategyDefinition = new Definition(Workflow\SupportStrategy\InstanceOfSupportStrategy::class, array($supportedClassName));
+                    $strategyDefinition = new Definition(Workflow\SupportStrategy\InstanceOfSupportStrategy::class, [$supportedClassName]);
                     $strategyDefinition->setPublic(false);
-                    $registryDefinition->addMethodCall('addWorkflow', array(new Reference($workflowId), $strategyDefinition));
+                    $registryDefinition->addMethodCall('addWorkflow', [new Reference($workflowId), $strategyDefinition]);
                 }
             } elseif (isset($workflow['support_strategy'])) {
-                $registryDefinition->addMethodCall('addWorkflow', array(new Reference($workflowId), new Reference($workflow['support_strategy'])));
+                $registryDefinition->addMethodCall('addWorkflow', [new Reference($workflowId), new Reference($workflow['support_strategy'])]);
             }
 
             // Enable the AuditTrail
             if ($workflow['audit_trail']['enabled']) {
                 $listener = new Definition(Workflow\EventListener\AuditTrailListener::class);
                 $listener->setPrivate(true);
-                $listener->addTag('monolog.logger', array('channel' => 'workflow'));
-                $listener->addTag('kernel.event_listener', array('event' => sprintf('workflow.%s.leave', $name), 'method' => 'onLeave'));
-                $listener->addTag('kernel.event_listener', array('event' => sprintf('workflow.%s.transition', $name), 'method' => 'onTransition'));
-                $listener->addTag('kernel.event_listener', array('event' => sprintf('workflow.%s.enter', $name), 'method' => 'onEnter'));
+                $listener->addTag('monolog.logger', ['channel' => 'workflow']);
+                $listener->addTag('kernel.event_listener', ['event' => sprintf('workflow.%s.leave', $name), 'method' => 'onLeave']);
+                $listener->addTag('kernel.event_listener', ['event' => sprintf('workflow.%s.transition', $name), 'method' => 'onTransition']);
+                $listener->addTag('kernel.event_listener', ['event' => sprintf('workflow.%s.enter', $name), 'method' => 'onEnter']);
                 $listener->addArgument(new Reference('logger'));
                 $container->setDefinition(sprintf('%s.listener.audit_trail', $workflowId), $listener);
             }
@@ -659,7 +659,7 @@ class FrameworkExtension extends Extension
                 $guard = new Definition(Workflow\EventListener\GuardListener::class);
                 $guard->setPrivate(true);
 
-                $guard->setArguments(array(
+                $guard->setArguments([
                     $guardsConfiguration,
                     new Reference('workflow.security.expression_language'),
                     new Reference('security.token_storage'),
@@ -667,9 +667,9 @@ class FrameworkExtension extends Extension
                     new Reference('security.authentication.trust_resolver'),
                     new Reference('security.role_hierarchy'),
                     new Reference('validator', ContainerInterface::NULL_ON_INVALID_REFERENCE),
-                ));
+                ]);
                 foreach ($guardsConfiguration as $eventName => $config) {
-                    $guard->addTag('kernel.event_listener', array('event' => $eventName, 'method' => 'onTransition'));
+                    $guard->addTag('kernel.event_listener', ['event' => $eventName, 'method' => 'onTransition']);
                 }
 
                 $container->setDefinition(sprintf('%s.listener.guard', $workflowId), $guard);
@@ -686,7 +686,7 @@ class FrameworkExtension extends Extension
             $container->register('debug.stopwatch', Stopwatch::class)
                 ->addArgument(true)
                 ->setPrivate(true)
-                ->addTag('kernel.reset', array('method' => 'reset'));
+                ->addTag('kernel.reset', ['method' => 'reset']);
             $container->setAlias(Stopwatch::class, new Alias('debug.stopwatch', false));
         }
 
@@ -735,7 +735,7 @@ class FrameworkExtension extends Extension
         $loader->load('routing.xml');
 
         if ($config['utf8']) {
-            $container->getDefinition('routing.loader')->replaceArgument(2, array('utf8' => true));
+            $container->getDefinition('routing.loader')->replaceArgument(2, ['utf8' => true]);
         }
 
         $container->setParameter('router.resource', $config['resource']);
@@ -754,24 +754,24 @@ class FrameworkExtension extends Extension
         if ($this->annotationsConfigEnabled) {
             $container->register('routing.loader.annotation', AnnotatedRouteControllerLoader::class)
                 ->setPublic(false)
-                ->addTag('routing.loader', array('priority' => -10))
+                ->addTag('routing.loader', ['priority' => -10])
                 ->addArgument(new Reference('annotation_reader'));
 
             $container->register('routing.loader.annotation.directory', AnnotationDirectoryLoader::class)
                 ->setPublic(false)
-                ->addTag('routing.loader', array('priority' => -10))
-                ->setArguments(array(
+                ->addTag('routing.loader', ['priority' => -10])
+                ->setArguments([
                     new Reference('file_locator'),
                     new Reference('routing.loader.annotation'),
-                ));
+                ]);
 
             $container->register('routing.loader.annotation.file', AnnotationFileLoader::class)
                 ->setPublic(false)
-                ->addTag('routing.loader', array('priority' => -10))
-                ->setArguments(array(
+                ->addTag('routing.loader', ['priority' => -10])
+                ->setArguments([
                     new Reference('file_locator'),
                     new Reference('routing.loader.annotation'),
-                ));
+                ]);
         }
     }
 
@@ -781,8 +781,8 @@ class FrameworkExtension extends Extension
 
         // session storage
         $container->setAlias('session.storage', $config['storage_id'])->setPrivate(true);
-        $options = array('cache_limiter' => '0');
-        foreach (array('name', 'cookie_lifetime', 'cookie_path', 'cookie_domain', 'cookie_secure', 'cookie_httponly', 'cookie_samesite', 'use_cookies', 'gc_maxlifetime', 'gc_probability', 'gc_divisor') as $key) {
+        $options = ['cache_limiter' => '0'];
+        foreach (['name', 'cookie_lifetime', 'cookie_path', 'cookie_domain', 'cookie_secure', 'cookie_httponly', 'cookie_samesite', 'use_cookies', 'gc_maxlifetime', 'gc_probability', 'gc_divisor'] as $key) {
             if (isset($config[$key])) {
                 $options[$key] = $config[$key];
             }
@@ -790,10 +790,10 @@ class FrameworkExtension extends Extension
 
         if ('auto' === ($options['cookie_secure'] ?? null)) {
             $locator = $container->getDefinition('session_listener')->getArgument(0);
-            $locator->setValues($locator->getValues() + array(
+            $locator->setValues($locator->getValues() + [
                 'session_storage' => new Reference('session.storage', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                 'request_stack' => new Reference('request_stack'),
-            ));
+            ]);
         }
 
         $container->setParameter('session.storage.options', $options);
@@ -832,11 +832,11 @@ class FrameworkExtension extends Extension
             $logger = new Reference('logger', ContainerInterface::IGNORE_ON_INVALID_REFERENCE);
 
             $container->getDefinition('templating.loader.cache')
-                ->addTag('monolog.logger', array('channel' => 'templating'))
-                ->addMethodCall('setLogger', array($logger));
+                ->addTag('monolog.logger', ['channel' => 'templating'])
+                ->addMethodCall('setLogger', [$logger]);
             $container->getDefinition('templating.loader.chain')
-                ->addTag('monolog.logger', array('channel' => 'templating'))
-                ->addMethodCall('setLogger', array($logger));
+                ->addTag('monolog.logger', ['channel' => 'templating'])
+                ->addMethodCall('setLogger', [$logger]);
         }
 
         if (!empty($config['loaders'])) {
@@ -870,13 +870,13 @@ class FrameworkExtension extends Extension
         } else {
             $templateEngineDefinition = $container->getDefinition('templating.engine.delegating');
             foreach ($engines as $engine) {
-                $templateEngineDefinition->addMethodCall('addEngine', array($engine));
+                $templateEngineDefinition->addMethodCall('addEngine', [$engine]);
             }
             $container->setAlias('templating', 'templating.engine.delegating')->setPublic(true);
         }
 
         $container->getDefinition('fragment.renderer.hinclude')
-            ->addTag('kernel.fragment_renderer', array('alias' => 'hinclude'))
+            ->addTag('kernel.fragment_renderer', ['alias' => 'hinclude'])
             ->replaceArgument(0, new Reference('templating'))
         ;
 
@@ -916,7 +916,7 @@ class FrameworkExtension extends Extension
         $defaultPackage = $this->createPackageDefinition($config['base_path'], $config['base_urls'], $defaultVersion);
         $container->setDefinition('assets._default_package', $defaultPackage);
 
-        $namedPackages = array();
+        $namedPackages = [];
         foreach ($config['packages'] as $name => $package) {
             if (null !== $package['version_strategy']) {
                 $version = new Reference($package['version_strategy']);
@@ -999,13 +999,13 @@ class FrameworkExtension extends Extension
         $container->setAlias('translator', 'translator.default')->setPublic(true);
         $container->setAlias('translator.formatter', new Alias($config['formatter'], false));
         $translator = $container->findDefinition('translator.default');
-        $translator->addMethodCall('setFallbackLocales', array($config['fallbacks']));
+        $translator->addMethodCall('setFallbackLocales', [$config['fallbacks']]);
 
         $container->setParameter('translator.logging', $config['logging']);
         $container->setParameter('translator.default_path', $config['default_path']);
 
         // Discover translation directories
-        $dirs = array();
+        $dirs = [];
         if (class_exists('Symfony\Component\Validator\Validation')) {
             $r = new \ReflectionClass('Symfony\Component\Validator\Validation');
 
@@ -1055,7 +1055,7 @@ class FrameworkExtension extends Extension
 
         // Register translation resources
         if ($dirs) {
-            $files = array();
+            $files = [];
             $finder = Finder::create()
                 ->followLinks()
                 ->files()
@@ -1069,7 +1069,7 @@ class FrameworkExtension extends Extension
             foreach ($finder as $file) {
                 list(, $locale) = explode('.', $file->getBasename(), 3);
                 if (!isset($files[$locale])) {
-                    $files[$locale] = array();
+                    $files[$locale] = [];
                 }
 
                 $files[$locale][] = (string) $file;
@@ -1077,7 +1077,7 @@ class FrameworkExtension extends Extension
 
             $options = array_merge(
                 $translator->getArgument(4),
-                array('resource_files' => $files)
+                ['resource_files' => $files]
             );
 
             $translator->replaceArgument(4, $options);
@@ -1104,15 +1104,15 @@ class FrameworkExtension extends Extension
 
         $container->setParameter('validator.translation_domain', $config['translation_domain']);
 
-        $files = array('xml' => array(), 'yml' => array());
+        $files = ['xml' => [], 'yml' => []];
         $this->registerValidatorMapping($container, $config, $files);
 
         if (!empty($files['xml'])) {
-            $validatorBuilder->addMethodCall('addXmlMappings', array($files['xml']));
+            $validatorBuilder->addMethodCall('addXmlMappings', [$files['xml']]);
         }
 
         if (!empty($files['yml'])) {
-            $validatorBuilder->addMethodCall('addYamlMappings', array($files['yml']));
+            $validatorBuilder->addMethodCall('addYamlMappings', [$files['yml']]);
         }
 
         $definition = $container->findDefinition('validator.email');
@@ -1123,17 +1123,17 @@ class FrameworkExtension extends Extension
                 throw new \LogicException('"enable_annotations" on the validator cannot be set as Annotations support is disabled.');
             }
 
-            $validatorBuilder->addMethodCall('enableAnnotationMapping', array(new Reference('annotation_reader')));
+            $validatorBuilder->addMethodCall('enableAnnotationMapping', [new Reference('annotation_reader')]);
         }
 
         if (array_key_exists('static_method', $config) && $config['static_method']) {
             foreach ($config['static_method'] as $methodName) {
-                $validatorBuilder->addMethodCall('addMethodMapping', array($methodName));
+                $validatorBuilder->addMethodCall('addMethodMapping', [$methodName]);
             }
         }
 
         if (!$container->getParameter('kernel.debug')) {
-            $validatorBuilder->addMethodCall('setMetadataCache', array(new Reference('validator.mapping.cache.symfony')));
+            $validatorBuilder->addMethodCall('setMetadataCache', [new Reference('validator.mapping.cache.symfony')]);
         }
     }
 
@@ -1213,7 +1213,7 @@ class FrameworkExtension extends Extension
 
         if (!method_exists(AnnotationRegistry::class, 'registerUniqueLoader')) {
             $container->getDefinition('annotations.dummy_registry')
-                ->setMethodCalls(array(array('registerLoader', array('class_exists'))));
+                ->setMethodCalls([['registerLoader', ['class_exists']]]);
         }
 
         if ('none' !== $config['cache']) {
@@ -1324,7 +1324,7 @@ class FrameworkExtension extends Extension
             $container->removeDefinition('serializer.encoder.yaml');
         }
 
-        $serializerLoaders = array();
+        $serializerLoaders = [];
         if (isset($config['enable_annotations']) && $config['enable_annotations']) {
             if (!$this->annotationsConfigEnabled) {
                 throw new \LogicException('"enable_annotations" on the serializer cannot be set as Annotations support is disabled.');
@@ -1332,7 +1332,7 @@ class FrameworkExtension extends Extension
 
             $annotationLoader = new Definition(
                 'Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader',
-                array(new Reference('annotation_reader'))
+                [new Reference('annotation_reader')]
             );
             $annotationLoader->setPublic(false);
 
@@ -1340,7 +1340,7 @@ class FrameworkExtension extends Extension
         }
 
         $fileRecorder = function ($extension, $path) use (&$serializerLoaders) {
-            $definition = new Definition(\in_array($extension, array('yaml', 'yml')) ? 'Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader' : 'Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader', array($path));
+            $definition = new Definition(\in_array($extension, ['yaml', 'yml']) ? 'Symfony\Component\Serializer\Mapping\Loader\YamlFileLoader' : 'Symfony\Component\Serializer\Mapping\Loader\XmlFileLoader', [$path]);
             $definition->setPublic(false);
             $serializerLoaders[] = $definition;
         };
@@ -1377,10 +1377,10 @@ class FrameworkExtension extends Extension
         if (!$container->getParameter('kernel.debug')) {
             $cacheMetadataFactory = new Definition(
                 CacheClassMetadataFactory::class,
-                array(
+                [
                     new Reference('serializer.mapping.cache_class_metadata_factory.inner'),
                     new Reference('serializer.mapping.cache.symfony'),
-                )
+                ]
             );
             $cacheMetadataFactory->setPublic(false);
             $cacheMetadataFactory->setDecoratedService('serializer.mapping.class_metadata_factory');
@@ -1393,11 +1393,11 @@ class FrameworkExtension extends Extension
         }
 
         if (isset($config['circular_reference_handler']) && $config['circular_reference_handler']) {
-            $container->getDefinition('serializer.normalizer.object')->addMethodCall('setCircularReferenceHandler', array(new Reference($config['circular_reference_handler'])));
+            $container->getDefinition('serializer.normalizer.object')->addMethodCall('setCircularReferenceHandler', [new Reference($config['circular_reference_handler'])]);
         }
 
         if ($config['max_depth_handler'] ?? false) {
-            $container->getDefinition('serializer.normalizer.object')->addMethodCall('setMaxDepthHandler', array(new Reference($config['max_depth_handler'])));
+            $container->getDefinition('serializer.normalizer.object')->addMethodCall('setMaxDepthHandler', [new Reference($config['max_depth_handler'])]);
         }
     }
 
@@ -1412,8 +1412,8 @@ class FrameworkExtension extends Extension
         if (interface_exists('phpDocumentor\Reflection\DocBlockFactoryInterface')) {
             $definition = $container->register('property_info.php_doc_extractor', 'Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor');
             $definition->setPrivate(true);
-            $definition->addTag('property_info.description_extractor', array('priority' => -1000));
-            $definition->addTag('property_info.type_extractor', array('priority' => -1001));
+            $definition->addTag('property_info.description_extractor', ['priority' => -1000]);
+            $definition->addTag('property_info.type_extractor', ['priority' => -1001]);
         }
     }
 
@@ -1427,7 +1427,7 @@ class FrameworkExtension extends Extension
             }
 
             // Generate stores
-            $storeDefinitions = array();
+            $storeDefinitions = [];
             foreach ($resourceStores as $storeDsn) {
                 $storeDsn = $container->resolveEnvPlaceholders($storeDsn, null, $usedEnvs);
                 switch (true) {
@@ -1449,15 +1449,15 @@ class FrameworkExtension extends Extension
                         if (!$container->hasDefinition($connectionDefinitionId = '.lock_connection.'.$container->hash($storeDsn))) {
                             $connectionDefinition = new Definition(\stdClass::class);
                             $connectionDefinition->setPublic(false);
-                            $connectionDefinition->setFactory(array(AbstractAdapter::class, 'createConnection'));
-                            $connectionDefinition->setArguments(array($storeDsn, array('lazy' => true)));
+                            $connectionDefinition->setFactory([AbstractAdapter::class, 'createConnection']);
+                            $connectionDefinition->setArguments([$storeDsn, ['lazy' => true]]);
                             $container->setDefinition($connectionDefinitionId, $connectionDefinition);
                         }
 
                         $storeDefinition = new Definition(StoreInterface::class);
                         $storeDefinition->setPublic(false);
-                        $storeDefinition->setFactory(array(StoreFactory::class, 'createStore'));
-                        $storeDefinition->setArguments(array(new Reference($connectionDefinitionId)));
+                        $storeDefinition->setFactory([StoreFactory::class, 'createStore']);
+                        $storeDefinition->setArguments([new Reference($connectionDefinitionId)]);
 
                         $container->setDefinition($storeDefinitionId = '.lock.'.$resourceName.'.store.'.$container->hash($storeDsn), $storeDefinition);
 
@@ -1487,8 +1487,8 @@ class FrameworkExtension extends Extension
             // Generate services for lock instances
             $lockDefinition = new Definition(Lock::class);
             $lockDefinition->setPublic(false);
-            $lockDefinition->setFactory(array(new Reference('lock.'.$resourceName.'.factory'), 'createLock'));
-            $lockDefinition->setArguments(array($resourceName));
+            $lockDefinition->setFactory([new Reference('lock.'.$resourceName.'.factory'), 'createLock']);
+            $lockDefinition->setArguments([$resourceName]);
             $container->setDefinition('lock.'.$resourceName, $lockDefinition);
 
             // provide alias for default resource
@@ -1541,16 +1541,16 @@ class FrameworkExtension extends Extension
             $config['default_bus'] = key($config['buses']);
         }
 
-        $defaultMiddleware = array(
-            'before' => array(array('id' => 'logging')),
-            'after' => array(array('id' => 'send_message'), array('id' => 'handle_message')),
-        );
+        $defaultMiddleware = [
+            'before' => [['id' => 'logging']],
+            'after' => [['id' => 'send_message'], ['id' => 'handle_message']],
+        ];
         foreach ($config['buses'] as $busId => $bus) {
             $middleware = $bus['middleware'];
 
             if ($bus['default_middleware']) {
                 if ('allow_no_handlers' === $bus['default_middleware']) {
-                    $defaultMiddleware['after'][1]['arguments'] = array(true);
+                    $defaultMiddleware['after'][1]['arguments'] = [true];
                 } else {
                     unset($defaultMiddleware['after'][1]['arguments']);
                 }
@@ -1558,17 +1558,17 @@ class FrameworkExtension extends Extension
             }
 
             foreach ($middleware as $middlewareItem) {
-                if (!$validationConfig['enabled'] && \in_array($middlewareItem['id'], array('validation', 'messenger.middleware.validation'), true)) {
+                if (!$validationConfig['enabled'] && \in_array($middlewareItem['id'], ['validation', 'messenger.middleware.validation'], true)) {
                     throw new LogicException('The Validation middleware is only available when the Validator component is installed and enabled. Try running "composer require symfony/validator".');
                 }
             }
 
             if ($container->getParameter('kernel.debug') && class_exists(Stopwatch::class)) {
-                array_unshift($middleware, array('id' => 'traceable', 'arguments' => array($busId)));
+                array_unshift($middleware, ['id' => 'traceable', 'arguments' => [$busId]]);
             }
 
             $container->setParameter($busId.'.middleware', $middleware);
-            $container->register($busId, MessageBus::class)->addArgument(array())->addTag('messenger.bus');
+            $container->register($busId, MessageBus::class)->addArgument([])->addTag('messenger.bus');
 
             if ($busId === $config['default_bus']) {
                 $container->setAlias('message_bus', $busId)->setPublic(true);
@@ -1578,28 +1578,28 @@ class FrameworkExtension extends Extension
             }
         }
 
-        $senderAliases = array();
+        $senderAliases = [];
         foreach ($config['transports'] as $name => $transport) {
             if (0 === strpos($transport['dsn'], 'amqp://') && !$container->hasDefinition('messenger.transport.amqp.factory')) {
                 throw new LogicException('The default AMQP transport is not available. Make sure you have installed and enabled the Serializer component. Try enabling it or running "composer require symfony/serializer-pack".');
             }
 
             $transportDefinition = (new Definition(TransportInterface::class))
-                ->setFactory(array(new Reference('messenger.transport_factory'), 'createTransport'))
-                ->setArguments(array($transport['dsn'], $transport['options']))
-                ->addTag('messenger.receiver', array('alias' => $name))
+                ->setFactory([new Reference('messenger.transport_factory'), 'createTransport'])
+                ->setArguments([$transport['dsn'], $transport['options']])
+                ->addTag('messenger.receiver', ['alias' => $name])
             ;
             $container->setDefinition($transportId = 'messenger.transport.'.$name, $transportDefinition);
             $senderAliases[$name] = $transportId;
         }
 
-        $messageToSendersMapping = array();
-        $messagesToSendAndHandle = array();
+        $messageToSendersMapping = [];
+        $messagesToSendAndHandle = [];
         foreach ($config['routing'] as $message => $messageConfiguration) {
             if ('*' !== $message && !class_exists($message) && !interface_exists($message, false)) {
                 throw new LogicException(sprintf('Invalid Messenger routing configuration: class or interface "%s" not found.', $message));
             }
-            $senders = array();
+            $senders = [];
             foreach ($messageConfiguration['senders'] as $sender) {
                 $senders[$sender] = new Reference($senderAliases[$sender] ?? $sender);
             }
@@ -1632,24 +1632,24 @@ class FrameworkExtension extends Extension
             // Inline any env vars referenced in the parameter
             $container->setParameter('cache.prefix.seed', $container->resolveEnvPlaceholders($container->getParameter('cache.prefix.seed'), true));
         }
-        foreach (array('doctrine', 'psr6', 'redis', 'memcached', 'pdo') as $name) {
+        foreach (['doctrine', 'psr6', 'redis', 'memcached', 'pdo'] as $name) {
             if (isset($config[$name = 'default_'.$name.'_provider'])) {
                 $container->setAlias('cache.'.$name, new Alias(CachePoolPass::getServiceProvider($container, $config[$name]), false));
             }
         }
-        foreach (array('app', 'system') as $name) {
-            $config['pools']['cache.'.$name] = array(
+        foreach (['app', 'system'] as $name) {
+            $config['pools']['cache.'.$name] = [
                 'adapter' => $config[$name],
                 'public' => true,
                 'tags' => false,
-            );
+            ];
         }
         foreach ($config['pools'] as $name => $pool) {
             if ($config['pools'][$pool['adapter']]['tags'] ?? false) {
                 $pool['adapter'] = '.'.$pool['adapter'].'.inner';
             }
             $definition = new ChildDefinition($pool['adapter']);
-            if (!\in_array($name, array('cache.app', 'cache.system'), true)) {
+            if (!\in_array($name, ['cache.app', 'cache.system'], true)) {
                 $container->registerAliasForArgument($name, CacheInterface::class);
                 $container->registerAliasForArgument($name, CacheItemPoolInterface::class);
             }
@@ -1680,13 +1680,13 @@ class FrameworkExtension extends Extension
             $propertyAccessDefinition->setPublic(false);
 
             if (!$container->getParameter('kernel.debug')) {
-                $propertyAccessDefinition->setFactory(array(PropertyAccessor::class, 'createCache'));
-                $propertyAccessDefinition->setArguments(array(null, null, $version, new Reference('logger', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)));
-                $propertyAccessDefinition->addTag('cache.pool', array('clearer' => 'cache.system_clearer'));
-                $propertyAccessDefinition->addTag('monolog.logger', array('channel' => 'cache'));
+                $propertyAccessDefinition->setFactory([PropertyAccessor::class, 'createCache']);
+                $propertyAccessDefinition->setArguments([null, null, $version, new Reference('logger', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)]);
+                $propertyAccessDefinition->addTag('cache.pool', ['clearer' => 'cache.system_clearer']);
+                $propertyAccessDefinition->addTag('monolog.logger', ['channel' => 'cache']);
             } else {
                 $propertyAccessDefinition->setClass(ArrayAdapter::class);
-                $propertyAccessDefinition->setArguments(array(0, false));
+                $propertyAccessDefinition->setArguments([0, false]);
             }
         }
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/EventListener/ResolveControllerNameSubscriber.php b/src/Symfony/Bundle/FrameworkBundle/EventListener/ResolveControllerNameSubscriber.php
index d4186daef6..e68ef896dd 100644
--- a/src/Symfony/Bundle/FrameworkBundle/EventListener/ResolveControllerNameSubscriber.php
+++ b/src/Symfony/Bundle/FrameworkBundle/EventListener/ResolveControllerNameSubscriber.php
@@ -43,8 +43,8 @@ class ResolveControllerNameSubscriber implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array('onKernelRequest', 24),
-        );
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 24],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
index be72760dcd..999f4aed36 100644
--- a/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
+++ b/src/Symfony/Bundle/FrameworkBundle/FrameworkBundle.php
@@ -78,13 +78,13 @@ class FrameworkBundle extends Bundle
     {
         parent::build($container);
 
-        $hotPathEvents = array(
+        $hotPathEvents = [
             KernelEvents::REQUEST,
             KernelEvents::CONTROLLER,
             KernelEvents::CONTROLLER_ARGUMENTS,
             KernelEvents::RESPONSE,
             KernelEvents::FINISH_REQUEST,
-        );
+        ];
 
         $container->addCompilerPass(new LoggerPass(), PassConfig::TYPE_BEFORE_OPTIMIZATION, -32);
         $container->addCompilerPass(new RegisterControllerArgumentLocatorsPass());
diff --git a/src/Symfony/Bundle/FrameworkBundle/HttpCache/HttpCache.php b/src/Symfony/Bundle/FrameworkBundle/HttpCache/HttpCache.php
index 67853ac5ab..e4a630fb48 100644
--- a/src/Symfony/Bundle/FrameworkBundle/HttpCache/HttpCache.php
+++ b/src/Symfony/Bundle/FrameworkBundle/HttpCache/HttpCache.php
@@ -37,7 +37,7 @@ class HttpCache extends BaseHttpCache
         $this->kernel = $kernel;
         $this->cacheDir = $cacheDir;
 
-        parent::__construct($kernel, $this->createStore(), $this->createSurrogate(), array_merge(array('debug' => $kernel->isDebug()), $this->getOptions()));
+        parent::__construct($kernel, $this->createStore(), $this->createSurrogate(), array_merge(['debug' => $kernel->isDebug()], $this->getOptions()));
     }
 
     /**
@@ -64,7 +64,7 @@ class HttpCache extends BaseHttpCache
      */
     protected function getOptions()
     {
-        return array();
+        return [];
     }
 
     protected function createSurrogate()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Kernel/MicroKernelTrait.php b/src/Symfony/Bundle/FrameworkBundle/Kernel/MicroKernelTrait.php
index 8a4e8e45bd..3919737e44 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Kernel/MicroKernelTrait.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Kernel/MicroKernelTrait.php
@@ -39,9 +39,9 @@ trait MicroKernelTrait
      *
      * You can register extensions:
      *
-     *     $c->loadFromExtension('framework', array(
+     *     $c->loadFromExtension('framework', [
      *         'secret' => '%secret%'
-     *     ));
+     *     ]);
      *
      * Or services:
      *
@@ -62,12 +62,12 @@ trait MicroKernelTrait
     public function registerContainerConfiguration(LoaderInterface $loader)
     {
         $loader->load(function (ContainerBuilder $container) use ($loader) {
-            $container->loadFromExtension('framework', array(
-                'router' => array(
+            $container->loadFromExtension('framework', [
+                'router' => [
                     'resource' => 'kernel::loadRoutes',
                     'type' => 'service',
-                ),
-            ));
+                ],
+            ]);
 
             if ($this instanceof EventSubscriberInterface) {
                 $container->register('kernel', static::class)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/attributes.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/attributes.html.php
index a9bd62f2a1..dbed8eff72 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/attributes.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/attributes.html.php
@@ -1,6 +1,6 @@
 <?php foreach ($attr as $k => $v): ?>
 <?php if ('placeholder' === $k || 'title' === $k): ?>
-<?php printf('%s="%s" ', $view->escape($k), $view->escape(false !== $translation_domain ? $view['translator']->trans($v, array(), $translation_domain) : $v)) ?>
+<?php printf('%s="%s" ', $view->escape($k), $view->escape(false !== $translation_domain ? $view['translator']->trans($v, [], $translation_domain) : $v)) ?>
 <?php elseif (true === $v): ?>
 <?php printf('%s="%s" ', $view->escape($k), $view->escape($k)) ?>
 <?php elseif (false !== $v): ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/button_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/button_widget.html.php
index 4b63876984..2a10aa0f41 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/button_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/button_widget.html.php
@@ -1,4 +1,4 @@
 <?php if (!$label) { $label = isset($label_format)
-    ? strtr($label_format, array('%name%' => $name, '%id%' => $id))
+    ? strtr($label_format, ['%name%' => $name, '%id%' => $id])
     : $view['form']->humanize($name); } ?>
-<button type="<?php echo isset($type) ? $view->escape($type) : 'button' ?>" <?php echo $view['form']->block($form, 'button_attributes') ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($label, array(), $translation_domain) : $label) ?></button>
+<button type="<?php echo isset($type) ? $view->escape($type) : 'button' ?>" <?php echo $view['form']->block($form, 'button_attributes') ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($label, [], $translation_domain) : $label) ?></button>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_collapsed.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_collapsed.html.php
index 92298cf5fc..c63d354e17 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_collapsed.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_collapsed.html.php
@@ -2,17 +2,17 @@
     <?php if ($required && null === $placeholder && $placeholder_in_choices === false && $multiple === false && (!isset($attr['size']) || $attr['size'] <= 1)):
         $required = false;
     endif; ?>
-    <?php echo $view['form']->block($form, 'widget_attributes', array(
+    <?php echo $view['form']->block($form, 'widget_attributes', [
         'required' => $required,
-    )) ?>
+    ]) ?>
     <?php if ($multiple): ?> multiple="multiple"<?php endif ?>
 >
-    <?php if (null !== $placeholder): ?><option value=""<?php if ($required && empty($value) && '0' !== $value): ?> selected="selected"<?php endif?>><?php echo '' != $placeholder ? $view->escape(false !== $translation_domain ? $view['translator']->trans($placeholder, array(), $translation_domain) : $placeholder) : '' ?></option><?php endif; ?>
+    <?php if (null !== $placeholder): ?><option value=""<?php if ($required && empty($value) && '0' !== $value): ?> selected="selected"<?php endif?>><?php echo '' != $placeholder ? $view->escape(false !== $translation_domain ? $view['translator']->trans($placeholder, [], $translation_domain) : $placeholder) : '' ?></option><?php endif; ?>
     <?php if (count($preferred_choices) > 0): ?>
-        <?php echo $view['form']->block($form, 'choice_widget_options', array('choices' => $preferred_choices)) ?>
+        <?php echo $view['form']->block($form, 'choice_widget_options', ['choices' => $preferred_choices]) ?>
         <?php if (count($choices) > 0 && null !== $separator): ?>
             <option disabled="disabled"><?php echo $separator ?></option>
         <?php endif ?>
     <?php endif ?>
-    <?php echo $view['form']->block($form, 'choice_widget_options', array('choices' => $choices)) ?>
+    <?php echo $view['form']->block($form, 'choice_widget_options', ['choices' => $choices]) ?>
 </select>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_expanded.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_expanded.html.php
index 2c42687207..9691759a90 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_expanded.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_expanded.html.php
@@ -1,6 +1,6 @@
 <div <?php echo $view['form']->block($form, 'widget_container_attributes') ?>>
 <?php foreach ($form as $child): ?>
     <?php echo $view['form']->widget($child) ?>
-    <?php echo $view['form']->label($child, null, array('translation_domain' => $choice_translation_domain)) ?>
+    <?php echo $view['form']->label($child, null, ['translation_domain' => $choice_translation_domain]) ?>
 <?php endforeach ?>
 </div>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_options.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_options.html.php
index f1c6ad3b56..a19b5a5e6e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_options.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_widget_options.html.php
@@ -4,10 +4,10 @@ $translatorHelper = $view['translator']; // outside of the loop for performance
 <?php $formHelper = $view['form']; ?>
 <?php foreach ($choices as $group_label => $choice): ?>
     <?php if (is_array($choice) || $choice instanceof ChoiceGroupView): ?>
-        <optgroup label="<?php echo $view->escape(false !== $choice_translation_domain ? $translatorHelper->trans($group_label, array(), $choice_translation_domain) : $group_label) ?>">
-            <?php echo $formHelper->block($form, 'choice_widget_options', array('choices' => $choice)) ?>
+        <optgroup label="<?php echo $view->escape(false !== $choice_translation_domain ? $translatorHelper->trans($group_label, [], $choice_translation_domain) : $group_label) ?>">
+            <?php echo $formHelper->block($form, 'choice_widget_options', ['choices' => $choice]) ?>
         </optgroup>
     <?php else: ?>
-        <option value="<?php echo $view->escape($choice->value) ?>" <?php echo $formHelper->block($form, 'choice_attributes', array('choice_attr' => $choice->attr)) ?><?php if ($is_selected($choice->value, $value)): ?> selected="selected"<?php endif?>><?php echo $view->escape(false !== $choice_translation_domain ? $translatorHelper->trans($choice->label, array(), $choice_translation_domain) : $choice->label) ?></option>
+        <option value="<?php echo $view->escape($choice->value) ?>" <?php echo $formHelper->block($form, 'choice_attributes', ['choice_attr' => $choice->attr]) ?><?php if ($is_selected($choice->value, $value)): ?> selected="selected"<?php endif?>><?php echo $view->escape(false !== $choice_translation_domain ? $translatorHelper->trans($choice->label, [], $choice_translation_domain) : $choice->label) ?></option>
     <?php endif ?>
 <?php endforeach ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/collection_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/collection_widget.html.php
index 9f6a94bcef..40dfdaf1f0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/collection_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/collection_widget.html.php
@@ -1,4 +1,4 @@
 <?php if (isset($prototype)): ?>
     <?php $attr['data-prototype'] = $view->escape($view['form']->row($prototype)) ?>
 <?php endif ?>
-<?php echo $view['form']->widget($form, array('attr' => $attr)) ?>
+<?php echo $view['form']->widget($form, ['attr' => $attr]) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/color_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/color_widget.html.php
index 10a8cdf149..48f5c2c30d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/color_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/color_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'color'));
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'color']);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/date_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/date_widget.html.php
index 22e51d2735..fbd844f286 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/date_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/date_widget.html.php
@@ -2,10 +2,10 @@
     <?php echo $view['form']->block($form, 'form_widget_simple'); ?>
 <?php else: ?>
     <div <?php echo $view['form']->block($form, 'widget_container_attributes') ?>>
-        <?php echo str_replace(array('{{ year }}', '{{ month }}', '{{ day }}'), array(
+        <?php echo str_replace(['{{ year }}', '{{ month }}', '{{ day }}'], [
             $view['form']->widget($form['year']),
             $view['form']->widget($form['month']),
             $view['form']->widget($form['day']),
-        ), $date_pattern) ?>
+        ], $date_pattern) ?>
     </div>
 <?php endif ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/email_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/email_widget.html.php
index 0b30c5bb7a..fa6b0ee8a1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/email_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/email_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'email')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'email']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_help.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_help.html.php
index 605f860cad..1490e7ab5f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_help.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_help.html.php
@@ -1,4 +1,4 @@
 <?php if (!empty($help)): ?>
     <?php $help_attr['class'] = isset($help_attr['class']) ? trim($help_attr['class'].' help-text') : 'help-text'; ?>
-    <p id="<?php echo $view->escape($id); ?>_help" <?php echo ' '.$view['form']->block($form, 'attributes', array('attr' => $help_attr)); ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($help, array(), $translation_domain) : $help); ?></p>
+    <p id="<?php echo $view->escape($id); ?>_help" <?php echo ' '.$view['form']->block($form, 'attributes', ['attr' => $help_attr]); ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($help, [], $translation_domain) : $help); ?></p>
 <?php endif; ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_label.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_label.html.php
index 78c953ec5a..8e8e5b9498 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_label.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_label.html.php
@@ -2,7 +2,7 @@
 <?php if ($required) { $label_attr['class'] = trim((isset($label_attr['class']) ? $label_attr['class'] : '').' required'); } ?>
 <?php if (!$compound) { $label_attr['for'] = $id; } ?>
 <?php if (!$label) { $label = isset($label_format)
-    ? strtr($label_format, array('%name%' => $name, '%id%' => $id))
+    ? strtr($label_format, ['%name%' => $name, '%id%' => $id])
     : $view['form']->humanize($name); } ?>
-<label<?php if ($label_attr) { echo ' '.$view['form']->block($form, 'attributes', array('attr' => $label_attr)); } ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($label, array(), $translation_domain) : $label) ?></label>
+<label<?php if ($label_attr) { echo ' '.$view['form']->block($form, 'attributes', ['attr' => $label_attr]); } ?>><?php echo $view->escape(false !== $translation_domain ? $view['translator']->trans($label, [], $translation_domain) : $label) ?></label>
 <?php endif ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_row.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_row.html.php
index ba81f45b5d..b6e750aa79 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_row.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/form_row.html.php
@@ -1,5 +1,5 @@
 <div>
-    <?php $widgetAttr = empty($help) ? array() : array('attr' => array('aria-describedby' => $id.'_help')); ?>
+    <?php $widgetAttr = empty($help) ? [] : ['attr' => ['aria-describedby' => $id.'_help']]; ?>
     <?php echo $view['form']->label($form); ?>
     <?php echo $view['form']->errors($form); ?>
     <?php echo $view['form']->widget($form, $widgetAttr); ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/hidden_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/hidden_widget.html.php
index a43f7de475..6bcbb5e046 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/hidden_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/hidden_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'hidden')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'hidden']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/integer_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/integer_widget.html.php
index 5fceb49a38..faaff51e67 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/integer_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/integer_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'number')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'number']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/number_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/number_widget.html.php
index bf4a4c4785..3d6f79c63b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/number_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/number_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'text')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'text']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/password_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/password_widget.html.php
index ec96cfb46b..5514468f6a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/password_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/password_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'password')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'password']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/percent_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/percent_widget.html.php
index 8519da429b..f5839ebf70 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/percent_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/percent_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'text')) ?> %
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'text']) ?> %
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/range_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/range_widget.html.php
index 4c628f8e00..d6650d8154 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/range_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/range_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'range'));
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'range']);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/reset_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/reset_widget.html.php
index e8fa18e488..af45b15669 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/reset_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/reset_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'button_widget', array('type' => isset($type) ? $type : 'reset')) ?>
+<?php echo $view['form']->block($form, 'button_widget', ['type' => isset($type) ? $type : 'reset']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/search_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/search_widget.html.php
index 48a33f4aa2..191279b517 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/search_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/search_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'search')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'search']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/submit_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/submit_widget.html.php
index 6bf71f5a1e..baea833326 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/submit_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/submit_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'button_widget', array('type' => isset($type) ? $type : 'submit')) ?>
+<?php echo $view['form']->block($form, 'button_widget', ['type' => isset($type) ? $type : 'submit']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/tel_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/tel_widget.html.php
index 7779538127..dd471b9518 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/tel_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/tel_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'tel'));
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'tel']);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/time_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/time_widget.html.php
index e24411cd74..cd2f559601 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/time_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/time_widget.html.php
@@ -1,7 +1,7 @@
 <?php if ($widget == 'single_text'): ?>
     <?php echo $view['form']->block($form, 'form_widget_simple'); ?>
 <?php else: ?>
-    <?php $vars = $widget == 'text' ? array('attr' => array('size' => 1)) : array() ?>
+    <?php $vars = $widget == 'text' ? ['attr' => ['size' => 1]] : [] ?>
     <div <?php echo $view['form']->block($form, 'widget_container_attributes') ?>>
         <?php
             // There should be no spaces between the colons and the widgets, that's why
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/url_widget.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/url_widget.html.php
index 9e26318497..cd653c89c5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/url_widget.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/url_widget.html.php
@@ -1 +1 @@
-<?php echo $view['form']->block($form, 'form_widget_simple', array('type' => isset($type) ? $type : 'url')) ?>
+<?php echo $view['form']->block($form, 'form_widget_simple', ['type' => isset($type) ? $type : 'url']) ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/FormTable/form_row.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/FormTable/form_row.html.php
index 71d606c3d4..92b87e1b67 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/FormTable/form_row.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/FormTable/form_row.html.php
@@ -1,5 +1,5 @@
 <tr>
-    <?php $widgetAttr = empty($help) ? array() : array('attr' => array('aria-describedby' => $id.'_help')); ?>
+    <?php $widgetAttr = empty($help) ? [] : ['attr' => ['aria-describedby' => $id.'_help']]; ?>
     <td>
         <?php echo $view['form']->label($form); ?>
     </td>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
index 474c725566..51419c8914 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
@@ -43,14 +43,14 @@ class AnnotatedRouteControllerLoader extends AnnotationClassLoader
      */
     protected function getDefaultRouteName(\ReflectionClass $class, \ReflectionMethod $method)
     {
-        return preg_replace(array(
+        return preg_replace([
             '/(bundle|controller)_/',
             '/action(_\d+)?$/',
             '/__/',
-        ), array(
+        ], [
             '_',
             '\\1',
             '_',
-        ), parent::getDefaultRouteName($class, $method));
+        ], parent::getDefaultRouteName($class, $method));
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
index 84e237626c..1e6b90a9bf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/DelegatingLoader.php
@@ -34,7 +34,7 @@ class DelegatingLoader extends BaseDelegatingLoader
      * @param ControllerNameParser    $parser   A ControllerNameParser instance
      * @param LoaderResolverInterface $resolver A LoaderResolverInterface instance
      */
-    public function __construct(ControllerNameParser $parser, LoaderResolverInterface $resolver, array $defaultOptions = array())
+    public function __construct(ControllerNameParser $parser, LoaderResolverInterface $resolver, array $defaultOptions = [])
     {
         $this->parser = $parser;
         $this->defaultOptions = $defaultOptions;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/RedirectableUrlMatcher.php b/src/Symfony/Bundle/FrameworkBundle/Routing/RedirectableUrlMatcher.php
index 5571c74e81..fd1594c883 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/RedirectableUrlMatcher.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/RedirectableUrlMatcher.php
@@ -29,7 +29,7 @@ class RedirectableUrlMatcher extends BaseMatcher
      */
     public function redirect($path, $route, $scheme = null)
     {
-        return array(
+        return [
             '_controller' => 'Symfony\\Bundle\\FrameworkBundle\\Controller\\RedirectController::urlRedirectAction',
             'path' => $path,
             'permanent' => true,
@@ -37,6 +37,6 @@ class RedirectableUrlMatcher extends BaseMatcher
             'httpPort' => $this->context->getHttpPort(),
             'httpsPort' => $this->context->getHttpsPort(),
             '_route' => $route,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
index 76c19536f5..6bea82e1ef 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
@@ -32,7 +32,7 @@ use Symfony\Component\Routing\Router as BaseRouter;
 class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberInterface
 {
     private $container;
-    private $collectedParameters = array();
+    private $collectedParameters = [];
     private $paramFetcher;
 
     /**
@@ -43,7 +43,7 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
      * @param ContainerInterface|null $parameters A ContainerInterface instance allowing to fetch parameters
      * @param LoggerInterface|null    $logger
      */
-    public function __construct(ContainerInterface $container, $resource, array $options = array(), RequestContext $context = null, ContainerInterface $parameters = null, LoggerInterface $logger = null)
+    public function __construct(ContainerInterface $container, $resource, array $options = [], RequestContext $context = null, ContainerInterface $parameters = null, LoggerInterface $logger = null)
     {
         $this->container = $container;
         $this->resource = $resource;
@@ -52,9 +52,9 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
         $this->setOptions($options);
 
         if ($parameters) {
-            $this->paramFetcher = array($parameters, 'get');
+            $this->paramFetcher = [$parameters, 'get'];
         } elseif ($container instanceof SymfonyContainerInterface) {
-            $this->paramFetcher = array($container, 'getParameter');
+            $this->paramFetcher = [$container, 'getParameter'];
         } else {
             throw new \LogicException(sprintf('You should either pass a "%s" instance or provide the $parameters argument of the "%s" method.', SymfonyContainerInterface::class, __METHOD__));
         }
@@ -112,13 +112,13 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
             $route->setPath($this->resolve($route->getPath()));
             $route->setHost($this->resolve($route->getHost()));
 
-            $schemes = array();
+            $schemes = [];
             foreach ($route->getSchemes() as $scheme) {
                 $schemes = array_merge($schemes, explode('|', $this->resolve($scheme)));
             }
             $route->setSchemes($schemes);
 
-            $methods = array();
+            $methods = [];
             foreach ($route->getMethods() as $method) {
                 $methods = array_merge($methods, explode('|', $this->resolve($method)));
             }
@@ -181,8 +181,8 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
      */
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'routing.loader' => LoaderInterface::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php b/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
index 07bf39f5b4..f40760fc91 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/DelegatingEngine.php
@@ -43,7 +43,7 @@ class DelegatingEngine extends BaseDelegatingEngine implements EngineInterface
     /**
      * {@inheritdoc}
      */
-    public function renderResponse($view, array $parameters = array(), Response $response = null)
+    public function renderResponse($view, array $parameters = [], Response $response = null)
     {
         $engine = $this->getEngine($view);
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/EngineInterface.php b/src/Symfony/Bundle/FrameworkBundle/Templating/EngineInterface.php
index cc0d573ee2..0b3a8b3200 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/EngineInterface.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/EngineInterface.php
@@ -32,5 +32,5 @@ interface EngineInterface extends BaseEngineInterface
      *
      * @throws \RuntimeException if the template cannot be rendered
      */
-    public function renderResponse($view, array $parameters = array(), Response $response = null);
+    public function renderResponse($view, array $parameters = [], Response $response = null);
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php
index 76a6046d9b..70e5a314bb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/ActionsHelper.php
@@ -39,7 +39,7 @@ class ActionsHelper extends Helper
      *
      * @see FragmentHandler::render()
      */
-    public function render($uri, array $options = array())
+    public function render($uri, array $options = [])
     {
         $strategy = isset($options['strategy']) ? $options['strategy'] : 'inline';
         unset($options['strategy']);
@@ -47,7 +47,7 @@ class ActionsHelper extends Helper
         return $this->handler->render($uri, $strategy, $options);
     }
 
-    public function controller($controller, $attributes = array(), $query = array())
+    public function controller($controller, $attributes = [], $query = [])
     {
         return new ControllerReference($controller, $attributes, $query);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
index 02f059bb9f..56fcc24cf0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/CodeHelper.php
@@ -80,7 +80,7 @@ class CodeHelper extends Helper
      */
     public function formatArgs(array $args)
     {
-        $result = array();
+        $result = [];
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
                 $parts = explode('\\', $item[1]);
@@ -133,7 +133,7 @@ class CodeHelper extends Helper
             $code = preg_replace('#^<code.*?>\s*<span.*?>(.*)</span>\s*</code>#s', '\\1', $code);
             $content = explode('<br />', $code);
 
-            $lines = array();
+            $lines = [];
             for ($i = max($line - 3, 1), $max = min($line + 3, \count($content)); $i <= $max; ++$i) {
                 $lines[] = '<li'.($i == $line ? ' class="selected"' : '').'><code>'.self::fixCodeMarkup($content[$i - 1]).'</code></li>';
             }
@@ -159,7 +159,7 @@ class CodeHelper extends Helper
             $file = trim($file);
             $fileStr = $file;
             if (0 === strpos($fileStr, $this->rootDir)) {
-                $fileStr = str_replace(array('\\', $this->rootDir), array('/', ''), $fileStr);
+                $fileStr = str_replace(['\\', $this->rootDir], ['/', ''], $fileStr);
                 $fileStr = htmlspecialchars($fileStr, $flags, $this->charset);
                 $fileStr = sprintf('<abbr title="%s">kernel.project_dir</abbr>/%s', htmlspecialchars($this->rootDir, $flags, $this->charset), $fileStr);
             }
@@ -185,7 +185,7 @@ class CodeHelper extends Helper
     public function getFileLink($file, $line)
     {
         if ($fmt = $this->fileLinkFormat) {
-            return \is_string($fmt) ? strtr($fmt, array('%f' => $file, '%l' => $line)) : $fmt->format($file, $line);
+            return \is_string($fmt) ? strtr($fmt, ['%f' => $file, '%l' => $line]) : $fmt->format($file, $line);
         }
 
         return false;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/FormHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/FormHelper.php
index 23b5c4e91e..dd1d14149a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/FormHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/FormHelper.php
@@ -61,9 +61,9 @@ class FormHelper extends Helper
      *
      * You can pass options during the call:
      *
-     *     <?php echo view['form']->form($form, array('attr' => array('class' => 'foo'))) ?>
+     *     <?php echo view['form']->form($form, ['attr' => ['class' => 'foo']]) ?>
      *
-     *     <?php echo view['form']->form($form, array('separator' => '+++++')) ?>
+     *     <?php echo view['form']->form($form, ['separator' => '+++++']) ?>
      *
      * This method is mainly intended for prototyping purposes. If you want to
      * control the layout of a form in a more fine-grained manner, you are
@@ -76,7 +76,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function form(FormView $view, array $variables = array())
+    public function form(FormView $view, array $variables = [])
     {
         return $this->renderer->renderBlock($view, 'form', $variables);
     }
@@ -93,7 +93,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function start(FormView $view, array $variables = array())
+    public function start(FormView $view, array $variables = [])
     {
         return $this->renderer->renderBlock($view, 'form_start', $variables);
     }
@@ -110,7 +110,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function end(FormView $view, array $variables = array())
+    public function end(FormView $view, array $variables = [])
     {
         return $this->renderer->renderBlock($view, 'form_end', $variables);
     }
@@ -124,16 +124,16 @@ class FormHelper extends Helper
      *
      * You can pass options during the call:
      *
-     *     <?php echo $view['form']->widget($form, array('attr' => array('class' => 'foo'))) ?>
+     *     <?php echo $view['form']->widget($form, ['attr' => ['class' => 'foo']]) ?>
      *
-     *     <?php echo $view['form']->widget($form, array('separator' => '+++++')) ?>
+     *     <?php echo $view['form']->widget($form, ['separator' => '+++++']) ?>
      *
      * @param FormView $view      The view for which to render the widget
      * @param array    $variables Additional variables passed to the template
      *
      * @return string The HTML markup
      */
-    public function widget(FormView $view, array $variables = array())
+    public function widget(FormView $view, array $variables = [])
     {
         return $this->renderer->searchAndRenderBlock($view, 'widget', $variables);
     }
@@ -146,7 +146,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function row(FormView $view, array $variables = array())
+    public function row(FormView $view, array $variables = [])
     {
         return $this->renderer->searchAndRenderBlock($view, 'row', $variables);
     }
@@ -160,10 +160,10 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function label(FormView $view, $label = null, array $variables = array())
+    public function label(FormView $view, $label = null, array $variables = [])
     {
         if (null !== $label) {
-            $variables += array('label' => $label);
+            $variables += ['label' => $label];
         }
 
         return $this->renderer->searchAndRenderBlock($view, 'label', $variables);
@@ -199,7 +199,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function rest(FormView $view, array $variables = array())
+    public function rest(FormView $view, array $variables = [])
     {
         return $this->renderer->searchAndRenderBlock($view, 'rest', $variables);
     }
@@ -213,7 +213,7 @@ class FormHelper extends Helper
      *
      * @return string The HTML markup
      */
-    public function block(FormView $view, $blockName, array $variables = array())
+    public function block(FormView $view, $blockName, array $variables = [])
     {
         return $this->renderer->renderBlock($view, $blockName, $variables);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/RouterHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/RouterHelper.php
index 683efd5974..f242479086 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/RouterHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/RouterHelper.php
@@ -39,7 +39,7 @@ class RouterHelper extends Helper
      *
      * @see UrlGeneratorInterface
      */
-    public function path($name, $parameters = array(), $relative = false)
+    public function path($name, $parameters = [], $relative = false)
     {
         return $this->generator->generate($name, $parameters, $relative ? UrlGeneratorInterface::RELATIVE_PATH : UrlGeneratorInterface::ABSOLUTE_PATH);
     }
@@ -55,7 +55,7 @@ class RouterHelper extends Helper
      *
      * @see UrlGeneratorInterface
      */
-    public function url($name, $parameters = array(), $schemeRelative = false)
+    public function url($name, $parameters = [], $schemeRelative = false)
     {
         return $this->generator->generate($name, $parameters, $schemeRelative ? UrlGeneratorInterface::NETWORK_PATH : UrlGeneratorInterface::ABSOLUTE_URL);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/SessionHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/SessionHelper.php
index 4de6e7eec0..072c1d3d21 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/SessionHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/SessionHelper.php
@@ -42,7 +42,7 @@ class SessionHelper extends Helper
         return $this->getSession()->get($name, $default);
     }
 
-    public function getFlash($name, array $default = array())
+    public function getFlash($name, array $default = [])
     {
         return $this->getSession()->getFlashBag()->get($name, $default);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
index e15273c385..1b16d47dbb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/StopwatchHelper.php
@@ -33,7 +33,7 @@ class StopwatchHelper extends Helper
         return 'stopwatch';
     }
 
-    public function __call($method, $arguments = array())
+    public function __call($method, $arguments = [])
     {
         if (null !== $this->stopwatch) {
             if (method_exists($this->stopwatch, $method)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/TranslatorHelper.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/TranslatorHelper.php
index 8120a0cd8e..22fed9921b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/TranslatorHelper.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Helper/TranslatorHelper.php
@@ -43,7 +43,7 @@ class TranslatorHelper extends Helper
     /**
      * @see TranslatorInterface::trans()
      */
-    public function trans($id, array $parameters = array(), $domain = 'messages', $locale = null)
+    public function trans($id, array $parameters = [], $domain = 'messages', $locale = null)
     {
         if (null === $this->translator) {
             return $this->doTrans($id, $parameters, $domain, $locale);
@@ -56,15 +56,15 @@ class TranslatorHelper extends Helper
      * @see TranslatorInterface::transChoice()
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = 'messages', $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = 'messages', $locale = null)
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%count%" parameter.', __METHOD__), E_USER_DEPRECATED);
 
         if (null === $this->translator) {
-            return $this->doTrans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+            return $this->doTrans($id, ['%count%' => $number] + $parameters, $domain, $locale);
         }
         if ($this->translator instanceof TranslatorInterface) {
-            return $this->translator->trans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+            return $this->translator->trans($id, ['%count%' => $number] + $parameters, $domain, $locale);
         }
 
         return $this->translator->transChoice($id, $number, $parameters, $domain, $locale);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/Loader/TemplateLocator.php b/src/Symfony/Bundle/FrameworkBundle/Templating/Loader/TemplateLocator.php
index 8f9b256d6a..4e4743dcc5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/Loader/TemplateLocator.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/Loader/TemplateLocator.php
@@ -24,7 +24,7 @@ class TemplateLocator implements FileLocatorInterface
     protected $locator;
     protected $cache;
 
-    private $cacheHits = array();
+    private $cacheHits = [];
 
     /**
      * @param FileLocatorInterface $locator  A FileLocatorInterface instance
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php b/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
index bad7c17931..ef9c43b8fd 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/PhpEngine.php
@@ -65,7 +65,7 @@ class PhpEngine extends BasePhpEngine implements EngineInterface
     /**
      * {@inheritdoc}
      */
-    public function renderResponse($view, array $parameters = array(), Response $response = null)
+    public function renderResponse($view, array $parameters = [], Response $response = null)
     {
         if (null === $response) {
             $response = new Response();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateNameParser.php b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateNameParser.php
index 726c2a2a30..d1be3e9074 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateNameParser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateNameParser.php
@@ -25,7 +25,7 @@ use Symfony\Component\Templating\TemplateReferenceInterface;
 class TemplateNameParser extends BaseTemplateNameParser
 {
     protected $kernel;
-    protected $cache = array();
+    protected $cache = [];
 
     public function __construct(KernelInterface $kernel)
     {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateReference.php b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateReference.php
index d03e4f59b8..830942972a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateReference.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/TemplateReference.php
@@ -22,13 +22,13 @@ class TemplateReference extends BaseTemplateReference
 {
     public function __construct(string $bundle = null, string $controller = null, string $name = null, string $format = null, string $engine = null)
     {
-        $this->parameters = array(
+        $this->parameters = [
             'bundle' => $bundle,
             'controller' => $controller,
             'name' => $name,
             'format' => $format,
             'engine' => $engine,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bundle/FrameworkBundle/Templating/TimedPhpEngine.php b/src/Symfony/Bundle/FrameworkBundle/Templating/TimedPhpEngine.php
index 3263ea24d0..783e675f97 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Templating/TimedPhpEngine.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Templating/TimedPhpEngine.php
@@ -35,7 +35,7 @@ class TimedPhpEngine extends PhpEngine
     /**
      * {@inheritdoc}
      */
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
         $e = $this->stopwatch->start(sprintf('template.php (%s)', $name), 'template');
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
index f951ba7afd..fa562f6088 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
@@ -59,7 +59,7 @@ abstract class KernelTestCase extends TestCase
      *
      * @return KernelInterface A KernelInterface instance
      */
-    protected static function bootKernel(array $options = array())
+    protected static function bootKernel(array $options = [])
     {
         static::ensureKernelShutdown();
 
@@ -82,7 +82,7 @@ abstract class KernelTestCase extends TestCase
      *
      * @return KernelInterface A KernelInterface instance
      */
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
         if (null === static::$class) {
             static::$class = static::getKernelClass();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/WebTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/WebTestCase.php
index 7302dc78aa..e56e938dd9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/WebTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/WebTestCase.php
@@ -29,7 +29,7 @@ abstract class WebTestCase extends KernelTestCase
      *
      * @return Client A Client instance
      */
-    protected static function createClient(array $options = array(), array $server = array())
+    protected static function createClient(array $options = [], array $server = [])
     {
         $kernel = static::bootKernel($options);
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/AnnotationsCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/AnnotationsCacheWarmerTest.php
index c1a3e9d9be..6ad71ab459 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/AnnotationsCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/AnnotationsCacheWarmerTest.php
@@ -33,7 +33,7 @@ class AnnotationsCacheWarmerTest extends TestCase
 
     public function testAnnotationsCacheWarmerWithDebugDisabled()
     {
-        file_put_contents($this->cacheDir.'/annotations.map', sprintf('<?php return %s;', var_export(array(__CLASS__), true)));
+        file_put_contents($this->cacheDir.'/annotations.map', sprintf('<?php return %s;', var_export([__CLASS__], true)));
         $cacheFile = tempnam($this->cacheDir, __FUNCTION__);
         $reader = new AnnotationReader();
         $warmer = new AnnotationsCacheWarmer($reader, $cacheFile);
@@ -53,7 +53,7 @@ class AnnotationsCacheWarmerTest extends TestCase
 
     public function testAnnotationsCacheWarmerWithDebugEnabled()
     {
-        file_put_contents($this->cacheDir.'/annotations.map', sprintf('<?php return %s;', var_export(array(__CLASS__), true)));
+        file_put_contents($this->cacheDir.'/annotations.map', sprintf('<?php return %s;', var_export([__CLASS__], true)));
         $cacheFile = tempnam($this->cacheDir, __FUNCTION__);
         $reader = new AnnotationReader();
         $warmer = new AnnotationsCacheWarmer($reader, $cacheFile, null, true);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/RouterCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/RouterCacheWarmerTest.php
index cb3bf19765..93dbd1a69e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/RouterCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/RouterCacheWarmerTest.php
@@ -21,9 +21,9 @@ class RouterCacheWarmerTest extends TestCase
 {
     public function testWarmUpWithWarmebleInterface()
     {
-        $containerMock = $this->getMockBuilder(ContainerInterface::class)->setMethods(array('get', 'has'))->getMock();
+        $containerMock = $this->getMockBuilder(ContainerInterface::class)->setMethods(['get', 'has'])->getMock();
 
-        $routerMock = $this->getMockBuilder(testRouterInterfaceWithWarmebleInterface::class)->setMethods(array('match', 'generate', 'getContext', 'setContext', 'getRouteCollection', 'warmUp'))->getMock();
+        $routerMock = $this->getMockBuilder(testRouterInterfaceWithWarmebleInterface::class)->setMethods(['match', 'generate', 'getContext', 'setContext', 'getRouteCollection', 'warmUp'])->getMock();
         $containerMock->expects($this->any())->method('get')->with('router')->willReturn($routerMock);
         $routerCacheWarmer = new RouterCacheWarmer($containerMock);
 
@@ -38,9 +38,9 @@ class RouterCacheWarmerTest extends TestCase
      */
     public function testWarmUpWithoutWarmebleInterface()
     {
-        $containerMock = $this->getMockBuilder(ContainerInterface::class)->setMethods(array('get', 'has'))->getMock();
+        $containerMock = $this->getMockBuilder(ContainerInterface::class)->setMethods(['get', 'has'])->getMock();
 
-        $routerMock = $this->getMockBuilder(testRouterInterfaceWithoutWarmebleInterface::class)->setMethods(array('match', 'generate', 'getContext', 'setContext', 'getRouteCollection'))->getMock();
+        $routerMock = $this->getMockBuilder(testRouterInterfaceWithoutWarmebleInterface::class)->setMethods(['match', 'generate', 'getContext', 'setContext', 'getRouteCollection'])->getMock();
         $containerMock->expects($this->any())->method('get')->with('router')->willReturn($routerMock);
         $routerCacheWarmer = new RouterCacheWarmer($containerMock);
         $routerCacheWarmer->warmUp('/tmp');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
index 4c7c1c929a..ccaa64931b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/SerializerCacheWarmerTest.php
@@ -27,10 +27,10 @@ class SerializerCacheWarmerTest extends TestCase
             $this->markTestSkipped('The Serializer default cache warmer has been introduced in the Serializer Component version 3.2.');
         }
 
-        $loaders = array(
+        $loaders = [
             new XmlFileLoader(__DIR__.'/../Fixtures/Serialization/Resources/person.xml'),
             new YamlFileLoader(__DIR__.'/../Fixtures/Serialization/Resources/author.yml'),
-        );
+        ];
 
         $file = sys_get_temp_dir().'/cache-serializer.php';
         @unlink($file);
@@ -55,7 +55,7 @@ class SerializerCacheWarmerTest extends TestCase
         $file = sys_get_temp_dir().'/cache-serializer-without-loader.php';
         @unlink($file);
 
-        $warmer = new SerializerCacheWarmer(array(), $file);
+        $warmer = new SerializerCacheWarmer([], $file);
         $warmer->warmUp(\dirname($file));
 
         $this->assertFileExists($file);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplateFinderTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplateFinderTest.php
index 5da592c356..94b5432c3a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplateFinderTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplateFinderTest.php
@@ -34,7 +34,7 @@ class TemplateFinderTest extends TestCase
         $kernel
             ->expects($this->once())
             ->method('getBundles')
-            ->will($this->returnValue(array('BaseBundle' => new BaseBundle())))
+            ->will($this->returnValue(['BaseBundle' => new BaseBundle()]))
         ;
 
         $parser = new TemplateFilenameParser();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplatePathsCacheWarmerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplatePathsCacheWarmerTest.php
index 75d5934c79..30d0242663 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplatePathsCacheWarmerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/CacheWarmer/TemplatePathsCacheWarmerTest.php
@@ -39,13 +39,13 @@ class TemplatePathsCacheWarmerTest extends TestCase
     {
         $this->templateFinder = $this
             ->getMockBuilder(TemplateFinderInterface::class)
-            ->setMethods(array('findAllTemplates'))
+            ->setMethods(['findAllTemplates'])
             ->getMock();
 
         $this->fileLocator = $this
             ->getMockBuilder(FileLocator::class)
-            ->setMethods(array('locate'))
-            ->setConstructorArgs(array('/path/to/fallback'))
+            ->setMethods(['locate'])
+            ->setConstructorArgs(['/path/to/fallback'])
             ->getMock();
 
         $this->templateLocator = new TemplateLocator($this->fileLocator);
@@ -68,7 +68,7 @@ class TemplatePathsCacheWarmerTest extends TestCase
         $this->templateFinder
             ->expects($this->once())
             ->method('findAllTemplates')
-            ->will($this->returnValue(array($template)));
+            ->will($this->returnValue([$template]));
 
         $this->fileLocator
             ->expects($this->once())
@@ -87,7 +87,7 @@ class TemplatePathsCacheWarmerTest extends TestCase
         $this->templateFinder
             ->expects($this->once())
             ->method('findAllTemplates')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
 
         $this->fileLocator
             ->expects($this->never())
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/ClientTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/ClientTest.php
index d021b0a29a..ba253d1d1f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/ClientTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/ClientTest.php
@@ -54,7 +54,7 @@ class ClientTest extends WebTestCase
     private function getKernelMock()
     {
         $mock = $this->getMockBuilder($this->getKernelClass())
-            ->setMethods(array('shutdown', 'boot', 'handle'))
+            ->setMethods(['shutdown', 'boot', 'handle'])
             ->disableOriginalConstructor()
             ->getMock();
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
index 9d9d28fde4..e91ecc50ca 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/CacheClearCommandTest.php
@@ -42,7 +42,7 @@ class CacheClearCommandTest extends TestCase
 
     public function testCacheIsFreshAfterCacheClearedWithWarmup()
     {
-        $input = new ArrayInput(array('cache:clear'));
+        $input = new ArrayInput(['cache:clear']);
         $application = new Application($this->kernel);
         $application->setCatchExceptions(false);
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/Fixture/TestAppKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/Fixture/TestAppKernel.php
index 5d014e745b..cf9ca2f7e5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/Fixture/TestAppKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CacheClearCommand/Fixture/TestAppKernel.php
@@ -21,9 +21,9 @@ class TestAppKernel extends Kernel
 {
     public function registerBundles()
     {
-        return array(
+        return [
             new FrameworkBundle(),
-        );
+        ];
     }
 
     public function getProjectDir()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePoolDeleteCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePoolDeleteCommandTest.php
index 7ccfa84804..e22d854207 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePoolDeleteCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePoolDeleteCommandTest.php
@@ -42,7 +42,7 @@ class CachePoolDeleteCommandTest extends TestCase
             ->willReturn(true);
 
         $tester = $this->getCommandTester($this->getKernel());
-        $tester->execute(array('pool' => 'foo', 'key' => 'bar'));
+        $tester->execute(['pool' => 'foo', 'key' => 'bar']);
 
         $this->assertContains('[OK] Cache item "bar" was successfully deleted.', $tester->getDisplay());
     }
@@ -59,7 +59,7 @@ class CachePoolDeleteCommandTest extends TestCase
             ->with('bar');
 
         $tester = $this->getCommandTester($this->getKernel());
-        $tester->execute(array('pool' => 'foo', 'key' => 'bar'));
+        $tester->execute(['pool' => 'foo', 'key' => 'bar']);
 
         $this->assertContains('[NOTE] Cache item "bar" does not exist in cache pool "foo".', $tester->getDisplay());
     }
@@ -83,7 +83,7 @@ class CachePoolDeleteCommandTest extends TestCase
         }
 
         $tester = $this->getCommandTester($this->getKernel());
-        $tester->execute(array('pool' => 'foo', 'key' => 'bar'));
+        $tester->execute(['pool' => 'foo', 'key' => 'bar']);
     }
 
     /**
@@ -107,7 +107,7 @@ class CachePoolDeleteCommandTest extends TestCase
         $kernel
             ->expects($this->once())
             ->method('getBundles')
-            ->willReturn(array());
+            ->willReturn([]);
 
         return $kernel;
     }
@@ -115,7 +115,7 @@ class CachePoolDeleteCommandTest extends TestCase
     private function getCommandTester(KernelInterface $kernel): CommandTester
     {
         $application = new Application($kernel);
-        $application->add(new CachePoolDeleteCommand(new Psr6CacheClearer(array('foo' => $this->cachePool))));
+        $application->add(new CachePoolDeleteCommand(new Psr6CacheClearer(['foo' => $this->cachePool])));
 
         return new CommandTester($application->find('cache:pool:delete'));
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePruneCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePruneCommandTest.php
index d13e120442..693fdfa101 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePruneCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/CachePruneCommandTest.php
@@ -24,13 +24,13 @@ class CachePruneCommandTest extends TestCase
     public function testCommandWithPools()
     {
         $tester = $this->getCommandTester($this->getKernel(), $this->getRewindableGenerator());
-        $tester->execute(array());
+        $tester->execute([]);
     }
 
     public function testCommandWithNoPools()
     {
         $tester = $this->getCommandTester($this->getKernel(), $this->getEmptyRewindableGenerator());
-        $tester->execute(array());
+        $tester->execute([]);
     }
 
     private function getRewindableGenerator(): RewindableGenerator
@@ -44,7 +44,7 @@ class CachePruneCommandTest extends TestCase
     private function getEmptyRewindableGenerator(): RewindableGenerator
     {
         return new RewindableGenerator(function () {
-            return new \ArrayIterator(array());
+            return new \ArrayIterator([]);
         }, 0);
     }
 
@@ -69,7 +69,7 @@ class CachePruneCommandTest extends TestCase
         $kernel
             ->expects($this->once())
             ->method('getBundles')
-            ->willReturn(array());
+            ->willReturn([]);
 
         return $kernel;
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
index 2506b71022..4881fcdbde 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/RouterMatchCommandTest.php
@@ -26,7 +26,7 @@ class RouterMatchCommandTest extends TestCase
     public function testWithMatchPath()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('path_info' => '/foo', 'foo'), array('decorated' => false));
+        $ret = $tester->execute(['path_info' => '/foo', 'foo'], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Route Name   | foo', $tester->getDisplay());
@@ -35,7 +35,7 @@ class RouterMatchCommandTest extends TestCase
     public function testWithNotMatchPath()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('path_info' => '/test', 'foo'), array('decorated' => false));
+        $ret = $tester->execute(['path_info' => '/test', 'foo'], ['decorated' => false]);
 
         $this->assertEquals(1, $ret, 'Returns 1 in case of failure');
         $this->assertContains('None of the routes match the path "/test"', $tester->getDisplay());
@@ -101,7 +101,7 @@ class RouterMatchCommandTest extends TestCase
         $kernel
             ->expects($this->once())
             ->method('getBundles')
-            ->willReturn(array())
+            ->willReturn([])
         ;
 
         return $kernel;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
index a082e01401..400f994d2f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationDebugCommandTest.php
@@ -26,24 +26,24 @@ class TranslationDebugCommandTest extends TestCase
 
     public function testDebugMissingMessages()
     {
-        $tester = $this->createCommandTester(array('foo' => 'foo'));
-        $tester->execute(array('locale' => 'en', 'bundle' => 'foo'));
+        $tester = $this->createCommandTester(['foo' => 'foo']);
+        $tester->execute(['locale' => 'en', 'bundle' => 'foo']);
 
         $this->assertRegExp('/missing/', $tester->getDisplay());
     }
 
     public function testDebugUnusedMessages()
     {
-        $tester = $this->createCommandTester(array(), array('foo' => 'foo'));
-        $tester->execute(array('locale' => 'en', 'bundle' => 'foo'));
+        $tester = $this->createCommandTester([], ['foo' => 'foo']);
+        $tester->execute(['locale' => 'en', 'bundle' => 'foo']);
 
         $this->assertRegExp('/unused/', $tester->getDisplay());
     }
 
     public function testDebugFallbackMessages()
     {
-        $tester = $this->createCommandTester(array(), array('foo' => 'foo'));
-        $tester->execute(array('locale' => 'fr', 'bundle' => 'foo'));
+        $tester = $this->createCommandTester([], ['foo' => 'foo']);
+        $tester->execute(['locale' => 'fr', 'bundle' => 'foo']);
 
         $this->assertRegExp('/fallback/', $tester->getDisplay());
     }
@@ -51,15 +51,15 @@ class TranslationDebugCommandTest extends TestCase
     public function testNoDefinedMessages()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('locale' => 'fr', 'bundle' => 'test'));
+        $tester->execute(['locale' => 'fr', 'bundle' => 'test']);
 
         $this->assertRegExp('/No defined or extracted messages for locale "fr"/', $tester->getDisplay());
     }
 
     public function testDebugDefaultDirectory()
     {
-        $tester = $this->createCommandTester(array('foo' => 'foo'), array('bar' => 'bar'));
-        $tester->execute(array('locale' => 'en'));
+        $tester = $this->createCommandTester(['foo' => 'foo'], ['bar' => 'bar']);
+        $tester->execute(['locale' => 'en']);
 
         $this->assertRegExp('/missing/', $tester->getDisplay());
         $this->assertRegExp('/unused/', $tester->getDisplay());
@@ -75,8 +75,8 @@ class TranslationDebugCommandTest extends TestCase
         $this->fs->mkdir($this->translationDir.'/Resources/translations');
         $this->fs->mkdir($this->translationDir.'/Resources/views');
 
-        $tester = $this->createCommandTester(array('foo' => 'foo'), array('bar' => 'bar'));
-        $tester->execute(array('locale' => 'en'));
+        $tester = $this->createCommandTester(['foo' => 'foo'], ['bar' => 'bar']);
+        $tester->execute(['locale' => 'en']);
 
         $this->assertRegExp('/missing/', $tester->getDisplay());
         $this->assertRegExp('/unused/', $tester->getDisplay());
@@ -90,8 +90,8 @@ class TranslationDebugCommandTest extends TestCase
         $this->fs->mkdir($this->translationDir.'/translations');
         $this->fs->mkdir($this->translationDir.'/templates');
 
-        $tester = $this->createCommandTester(array('foo' => 'foo'), array('bar' => 'bar'));
-        $tester->execute(array('locale' => 'en'));
+        $tester = $this->createCommandTester(['foo' => 'foo'], ['bar' => 'bar']);
+        $tester->execute(['locale' => 'en']);
 
         $this->assertRegExp('/missing/', $tester->getDisplay());
         $this->assertRegExp('/unused/', $tester->getDisplay());
@@ -107,8 +107,8 @@ class TranslationDebugCommandTest extends TestCase
             ->with($this->equalTo($this->translationDir.'/customDir'))
             ->willThrowException(new \InvalidArgumentException());
 
-        $tester = $this->createCommandTester(array('foo' => 'foo'), array('bar' => 'bar'), $kernel);
-        $tester->execute(array('locale' => 'en', 'bundle' => $this->translationDir.'/customDir'));
+        $tester = $this->createCommandTester(['foo' => 'foo'], ['bar' => 'bar'], $kernel);
+        $tester->execute(['locale' => 'en', 'bundle' => $this->translationDir.'/customDir']);
 
         $this->assertRegExp('/missing/', $tester->getDisplay());
         $this->assertRegExp('/unused/', $tester->getDisplay());
@@ -125,8 +125,8 @@ class TranslationDebugCommandTest extends TestCase
             ->with($this->equalTo('dir'))
             ->willThrowException(new \InvalidArgumentException());
 
-        $tester = $this->createCommandTester(array(), array(), $kernel);
-        $tester->execute(array('locale' => 'en', 'bundle' => 'dir'));
+        $tester = $this->createCommandTester([], [], $kernel);
+        $tester->execute(['locale' => 'en', 'bundle' => 'dir']);
     }
 
     protected function setUp()
@@ -145,7 +145,7 @@ class TranslationDebugCommandTest extends TestCase
     /**
      * @return CommandTester
      */
-    private function createCommandTester($extractedMessages = array(), $loadedMessages = array(), $kernel = null)
+    private function createCommandTester($extractedMessages = [], $loadedMessages = [], $kernel = null)
     {
         $translator = $this->getMockBuilder('Symfony\Component\Translation\Translator')
             ->disableOriginalConstructor()
@@ -154,7 +154,7 @@ class TranslationDebugCommandTest extends TestCase
         $translator
             ->expects($this->any())
             ->method('getFallbackLocales')
-            ->will($this->returnValue(array('en')));
+            ->will($this->returnValue(['en']));
 
         $extractor = $this->getMockBuilder('Symfony\Component\Translation\Extractor\ExtractorInterface')->getMock();
         $extractor
@@ -177,15 +177,15 @@ class TranslationDebugCommandTest extends TestCase
             );
 
         if (null === $kernel) {
-            $returnValues = array(
-                array('foo', $this->getBundle($this->translationDir)),
-                array('test', $this->getBundle('test')),
-            );
+            $returnValues = [
+                ['foo', $this->getBundle($this->translationDir)],
+                ['test', $this->getBundle('test')],
+            ];
             if (HttpKernel\Kernel::VERSION_ID < 40000) {
-                $returnValues = array(
-                    array('foo', true, $this->getBundle($this->translationDir)),
-                    array('test', true, $this->getBundle('test')),
-                );
+                $returnValues = [
+                    ['foo', true, $this->getBundle($this->translationDir)],
+                    ['test', true, $this->getBundle('test')],
+                ];
             }
             $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\KernelInterface')->getMock();
             $kernel
@@ -197,7 +197,7 @@ class TranslationDebugCommandTest extends TestCase
         $kernel
             ->expects($this->any())
             ->method('getBundles')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
 
         $container = new Container();
         $container->setParameter('kernel.root_dir', $this->translationDir);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
index 0baa8d8abe..b1a957201f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/TranslationUpdateCommandTest.php
@@ -26,8 +26,8 @@ class TranslationUpdateCommandTest extends TestCase
 
     public function testDumpMessagesAndClean()
     {
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true]);
         $this->assertRegExp('/foo/', $tester->getDisplay());
         $this->assertRegExp('/1 message was successfully extracted/', $tester->getDisplay());
     }
@@ -39,16 +39,16 @@ class TranslationUpdateCommandTest extends TestCase
         $this->fs->mkdir($this->translationDir.'/translations');
         $this->fs->mkdir($this->translationDir.'/templates');
 
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', '--dump-messages' => true, '--clean' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', '--dump-messages' => true, '--clean' => true]);
         $this->assertRegExp('/foo/', $tester->getDisplay());
         $this->assertRegExp('/1 message was successfully extracted/', $tester->getDisplay());
     }
 
     public function testDumpTwoMessagesAndClean()
     {
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo', 'bar' => 'bar')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo', 'bar' => 'bar']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true]);
         $this->assertRegExp('/foo/', $tester->getDisplay());
         $this->assertRegExp('/bar/', $tester->getDisplay());
         $this->assertRegExp('/2 messages were successfully extracted/', $tester->getDisplay());
@@ -56,16 +56,16 @@ class TranslationUpdateCommandTest extends TestCase
 
     public function testDumpMessagesForSpecificDomain()
     {
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo'), 'mydomain' => array('bar' => 'bar')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true, '--domain' => 'mydomain'));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo'], 'mydomain' => ['bar' => 'bar']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--dump-messages' => true, '--clean' => true, '--domain' => 'mydomain']);
         $this->assertRegExp('/bar/', $tester->getDisplay());
         $this->assertRegExp('/1 message was successfully extracted/', $tester->getDisplay());
     }
 
     public function testWriteMessages()
     {
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--force' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--force' => true]);
         $this->assertRegExp('/Translation files were successfully updated./', $tester->getDisplay());
     }
 
@@ -76,8 +76,8 @@ class TranslationUpdateCommandTest extends TestCase
         $this->fs->mkdir($this->translationDir.'/translations');
         $this->fs->mkdir($this->translationDir.'/templates');
 
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', '--force' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', '--force' => true]);
         $this->assertRegExp('/Translation files were successfully updated./', $tester->getDisplay());
     }
 
@@ -93,15 +93,15 @@ class TranslationUpdateCommandTest extends TestCase
         $this->fs->mkdir($this->translationDir.'/Resources/translations');
         $this->fs->mkdir($this->translationDir.'/Resources/views');
 
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', '--force' => true));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', '--force' => true]);
         $this->assertRegExp('/Translation files were successfully updated./', $tester->getDisplay());
     }
 
     public function testWriteMessagesForSpecificDomain()
     {
-        $tester = $this->createCommandTester(array('messages' => array('foo' => 'foo'), 'mydomain' => array('bar' => 'bar')));
-        $tester->execute(array('command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--force' => true, '--domain' => 'mydomain'));
+        $tester = $this->createCommandTester(['messages' => ['foo' => 'foo'], 'mydomain' => ['bar' => 'bar']]);
+        $tester->execute(['command' => 'translation:update', 'locale' => 'en', 'bundle' => 'foo', '--force' => true, '--domain' => 'mydomain']);
         $this->assertRegExp('/Translation files were successfully updated./', $tester->getDisplay());
     }
 
@@ -121,7 +121,7 @@ class TranslationUpdateCommandTest extends TestCase
     /**
      * @return CommandTester
      */
-    private function createCommandTester($extractedMessages = array(), $loadedMessages = array(), HttpKernel\KernelInterface $kernel = null)
+    private function createCommandTester($extractedMessages = [], $loadedMessages = [], HttpKernel\KernelInterface $kernel = null)
     {
         $translator = $this->getMockBuilder('Symfony\Component\Translation\Translator')
             ->disableOriginalConstructor()
@@ -130,7 +130,7 @@ class TranslationUpdateCommandTest extends TestCase
         $translator
             ->expects($this->any())
             ->method('getFallbackLocales')
-            ->will($this->returnValue(array('en')));
+            ->will($this->returnValue(['en']));
 
         $extractor = $this->getMockBuilder('Symfony\Component\Translation\Extractor\ExtractorInterface')->getMock();
         $extractor
@@ -159,19 +159,19 @@ class TranslationUpdateCommandTest extends TestCase
             ->expects($this->any())
             ->method('getFormats')
             ->will(
-                $this->returnValue(array('xlf', 'yml'))
+                $this->returnValue(['xlf', 'yml'])
             );
 
         if (null === $kernel) {
-            $returnValues = array(
-                array('foo', $this->getBundle($this->translationDir)),
-                array('test', $this->getBundle('test')),
-            );
+            $returnValues = [
+                ['foo', $this->getBundle($this->translationDir)],
+                ['test', $this->getBundle('test')],
+            ];
             if (HttpKernel\Kernel::VERSION_ID < 40000) {
-                $returnValues = array(
-                    array('foo', true, $this->getBundle($this->translationDir)),
-                    array('test', true, $this->getBundle('test')),
-                );
+                $returnValues = [
+                    ['foo', true, $this->getBundle($this->translationDir)],
+                    ['test', true, $this->getBundle('test')],
+                ];
             }
             $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\KernelInterface')->getMock();
             $kernel
@@ -188,7 +188,7 @@ class TranslationUpdateCommandTest extends TestCase
         $kernel
             ->expects($this->any())
             ->method('getBundles')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
 
         $container = new Container();
         $container->setParameter('kernel.root_dir', $this->translationDir);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/XliffLintCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/XliffLintCommandTest.php
index 2d0e8dcd1b..1729351a7d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/XliffLintCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/XliffLintCommandTest.php
@@ -64,8 +64,8 @@ EOF;
     {
         $tester = $this->createCommandTester($this->getKernelAwareApplicationMock());
         $tester->execute(
-            array('filename' => '@AppBundle/Resources'),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => '@AppBundle/Resources'],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
@@ -134,7 +134,7 @@ EOF;
     protected function setUp()
     {
         @mkdir(sys_get_temp_dir().'/xliff-lint-test');
-        $this->files = array();
+        $this->files = [];
     }
 
     protected function tearDown()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/YamlLintCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/YamlLintCommandTest.php
index 2daa2e3228..a71fb824d5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Command/YamlLintCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Command/YamlLintCommandTest.php
@@ -36,8 +36,8 @@ class YamlLintCommandTest extends TestCase
         $filename = $this->createFile('foo: bar');
 
         $tester->execute(
-            array('filename' => $filename),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => $filename],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
@@ -52,7 +52,7 @@ bar';
         $tester = $this->createCommandTester();
         $filename = $this->createFile($incorrectContent);
 
-        $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
 
         $this->assertEquals(1, $tester->getStatusCode(), 'Returns 1 in case of error');
         $this->assertContains('Unable to parse at line 3 (near "bar").', trim($tester->getDisplay()));
@@ -67,7 +67,7 @@ bar';
         $filename = $this->createFile('');
         unlink($filename);
 
-        $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
     }
 
     public function testGetHelp()
@@ -103,8 +103,8 @@ EOF;
     {
         $tester = $this->createCommandTester($this->getKernelAwareApplicationMock());
         $tester->execute(
-            array('filename' => '@AppBundle/Resources'),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => '@AppBundle/Resources'],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
@@ -186,7 +186,7 @@ EOF;
     protected function setUp()
     {
         @mkdir(sys_get_temp_dir().'/yml-lint-test');
-        $this->files = array();
+        $this->files = [];
     }
 
     protected function tearDown()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/ApplicationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/ApplicationTest.php
index fe171ed623..6662efd4a4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/ApplicationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/ApplicationTest.php
@@ -29,30 +29,30 @@ class ApplicationTest extends TestCase
     {
         $bundle = $this->getMockBuilder('Symfony\Component\HttpKernel\Bundle\BundleInterface')->getMock();
 
-        $kernel = $this->getKernel(array($bundle), true);
+        $kernel = $this->getKernel([$bundle], true);
 
         $application = new Application($kernel);
-        $application->doRun(new ArrayInput(array('list')), new NullOutput());
+        $application->doRun(new ArrayInput(['list']), new NullOutput());
     }
 
     public function testBundleCommandsAreRegistered()
     {
-        $bundle = $this->createBundleMock(array());
+        $bundle = $this->createBundleMock([]);
 
-        $kernel = $this->getKernel(array($bundle), true);
+        $kernel = $this->getKernel([$bundle], true);
 
         $application = new Application($kernel);
-        $application->doRun(new ArrayInput(array('list')), new NullOutput());
+        $application->doRun(new ArrayInput(['list']), new NullOutput());
 
         // Calling twice: registration should only be done once.
-        $application->doRun(new ArrayInput(array('list')), new NullOutput());
+        $application->doRun(new ArrayInput(['list']), new NullOutput());
     }
 
     public function testBundleCommandsAreRetrievable()
     {
-        $bundle = $this->createBundleMock(array());
+        $bundle = $this->createBundleMock([]);
 
-        $kernel = $this->getKernel(array($bundle));
+        $kernel = $this->getKernel([$bundle]);
 
         $application = new Application($kernel);
         $application->all();
@@ -65,9 +65,9 @@ class ApplicationTest extends TestCase
     {
         $command = new Command('example');
 
-        $bundle = $this->createBundleMock(array($command));
+        $bundle = $this->createBundleMock([$command]);
 
-        $kernel = $this->getKernel(array($bundle));
+        $kernel = $this->getKernel([$bundle]);
 
         $application = new Application($kernel);
 
@@ -78,9 +78,9 @@ class ApplicationTest extends TestCase
     {
         $command = new Command('example');
 
-        $bundle = $this->createBundleMock(array($command));
+        $bundle = $this->createBundleMock([$command]);
 
-        $kernel = $this->getKernel(array($bundle));
+        $kernel = $this->getKernel([$bundle]);
 
         $application = new Application($kernel);
 
@@ -90,11 +90,11 @@ class ApplicationTest extends TestCase
     public function testBundleCommandCanBeFoundByAlias()
     {
         $command = new Command('example');
-        $command->setAliases(array('alias'));
+        $command->setAliases(['alias']);
 
-        $bundle = $this->createBundleMock(array($command));
+        $bundle = $this->createBundleMock([$command]);
 
-        $kernel = $this->getKernel(array($bundle));
+        $kernel = $this->getKernel([$bundle]);
 
         $application = new Application($kernel);
 
@@ -107,30 +107,30 @@ class ApplicationTest extends TestCase
      */
     public function testBundleCommandsHaveRightContainer()
     {
-        $command = $this->getMockForAbstractClass('Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand', array('foo'), '', true, true, true, array('setContainer'));
+        $command = $this->getMockForAbstractClass('Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand', ['foo'], '', true, true, true, ['setContainer']);
         $command->setCode(function () {});
         $command->expects($this->exactly(2))->method('setContainer');
 
-        $application = new Application($this->getKernel(array(), true));
+        $application = new Application($this->getKernel([], true));
         $application->setAutoExit(false);
         $application->setCatchExceptions(false);
         $application->add($command);
         $tester = new ApplicationTester($application);
 
         // set container is called here
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
 
         // as the container might have change between two runs, setContainer must called again
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
     }
 
     public function testBundleCommandCanOverriddeAPreExistingCommandWithTheSameName()
     {
         $command = new Command('example');
 
-        $bundle = $this->createBundleMock(array($command));
+        $bundle = $this->createBundleMock([$command]);
 
-        $kernel = $this->getKernel(array($bundle));
+        $kernel = $this->getKernel([$bundle]);
 
         $application = new Application($kernel);
         $newCommand = new Command('example');
@@ -144,14 +144,14 @@ class ApplicationTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('event_dispatcher', EventDispatcher::class);
         $container->register(ThrowingCommand::class, ThrowingCommand::class);
-        $container->setParameter('console.command.ids', array(ThrowingCommand::class => ThrowingCommand::class));
+        $container->setParameter('console.command.ids', [ThrowingCommand::class => ThrowingCommand::class]);
 
         $kernel = $this->getMockBuilder(KernelInterface::class)->getMock();
         $kernel
             ->method('getBundles')
-            ->willReturn(array($this->createBundleMock(
-                array((new Command('fine'))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); }))
-            )));
+            ->willReturn([$this->createBundleMock(
+                [(new Command('fine'))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); })]
+            )]);
         $kernel
             ->method('getContainer')
             ->willReturn($container);
@@ -160,7 +160,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'fine'));
+        $tester->run(['command' => 'fine']);
         $output = $tester->getDisplay();
 
         $this->assertSame(0, $tester->getStatusCode());
@@ -177,9 +177,9 @@ class ApplicationTest extends TestCase
         $kernel = $this->getMockBuilder(KernelInterface::class)->getMock();
         $kernel
             ->method('getBundles')
-            ->willReturn(array($this->createBundleMock(
-                array((new Command(null))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); }))
-            )));
+            ->willReturn([$this->createBundleMock(
+                [(new Command(null))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); })]
+            )]);
         $kernel
             ->method('getContainer')
             ->willReturn($container);
@@ -188,7 +188,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'fine'));
+        $tester->run(['command' => 'fine']);
         $output = $tester->getDisplay();
 
         $this->assertSame(1, $tester->getStatusCode());
@@ -201,15 +201,15 @@ class ApplicationTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('event_dispatcher', EventDispatcher::class);
         $container->register(ThrowingCommand::class, ThrowingCommand::class);
-        $container->setParameter('console.command.ids', array(ThrowingCommand::class => ThrowingCommand::class));
+        $container->setParameter('console.command.ids', [ThrowingCommand::class => ThrowingCommand::class]);
 
         $kernel = $this->getMockBuilder(KernelInterface::class)->getMock();
         $kernel->expects($this->once())->method('boot');
         $kernel
             ->method('getBundles')
-            ->willReturn(array($this->createBundleMock(
-                array((new Command('fine'))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); }))
-            )));
+            ->willReturn([$this->createBundleMock(
+                [(new Command('fine'))->setCode(function (InputInterface $input, OutputInterface $output) { $output->write('fine'); })]
+            )]);
         $kernel
             ->method('getContainer')
             ->willReturn($container);
@@ -218,7 +218,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'list'));
+        $tester->run(['command' => 'list']);
 
         $this->assertSame(0, $tester->getStatusCode());
         $display = explode('Lists commands', $tester->getDisplay());
@@ -246,14 +246,14 @@ class ApplicationTest extends TestCase
         $container
             ->expects($this->exactly(2))
             ->method('hasParameter')
-            ->withConsecutive(array('console.command.ids'), array('console.lazy_command.ids'))
+            ->withConsecutive(['console.command.ids'], ['console.lazy_command.ids'])
             ->willReturnOnConsecutiveCalls(true, true)
         ;
         $container
             ->expects($this->exactly(2))
             ->method('getParameter')
-            ->withConsecutive(array('console.lazy_command.ids'), array('console.command.ids'))
-            ->willReturnOnConsecutiveCalls(array(), array())
+            ->withConsecutive(['console.lazy_command.ids'], ['console.command.ids'])
+            ->willReturnOnConsecutiveCalls([], [])
         ;
 
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\KernelInterface')->getMock();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
index 5ac0ab0a33..33b0cb6375 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/AbstractDescriptorTest.php
@@ -96,13 +96,13 @@ abstract class AbstractDescriptorTest extends TestCase
     /** @dataProvider getDescribeContainerDefinitionWithArgumentsShownTestData */
     public function testDescribeContainerDefinitionWithArgumentsShown(Definition $definition, $expectedDescription)
     {
-        $this->assertDescription($expectedDescription, $definition, array('show_arguments' => true));
+        $this->assertDescription($expectedDescription, $definition, ['show_arguments' => true]);
     }
 
     public function getDescribeContainerDefinitionWithArgumentsShownTestData()
     {
         $definitions = ObjectsProvider::getContainerDefinitions();
-        $definitionsWithArgs = array();
+        $definitionsWithArgs = [];
 
         foreach ($definitions as $key => $definition) {
             $definitionsWithArgs[str_replace('definition_', 'definition_arguments_', $key)] = $definition;
@@ -123,7 +123,7 @@ abstract class AbstractDescriptorTest extends TestCase
     }
 
     /** @dataProvider getDescribeContainerDefinitionWhichIsAnAliasTestData */
-    public function testDescribeContainerDefinitionWhichIsAnAlias(Alias $alias, $expectedDescription, ContainerBuilder $builder, $options = array())
+    public function testDescribeContainerDefinitionWhichIsAnAlias(Alias $alias, $expectedDescription, ContainerBuilder $builder, $options = [])
     {
         $this->assertDescription($expectedDescription, $builder, $options);
     }
@@ -135,7 +135,7 @@ abstract class AbstractDescriptorTest extends TestCase
         $builder->setDefinition('.service_2', $builder->getDefinition('.definition_2'));
 
         $aliases = ObjectsProvider::getContainerAliases();
-        $aliasesWithDefinitions = array();
+        $aliasesWithDefinitions = [];
         foreach ($aliases as $name => $alias) {
             $aliasesWithDefinitions[str_replace('alias_', 'alias_with_definition_', $name)] = $alias;
         }
@@ -145,7 +145,7 @@ abstract class AbstractDescriptorTest extends TestCase
         foreach ($aliases as $name => $alias) {
             $file = array_pop($data[$i]);
             $data[$i][] = $builder;
-            $data[$i][] = array('id' => $name);
+            $data[$i][] = ['id' => $name];
             $data[$i][] = $file;
             ++$i;
         }
@@ -164,10 +164,10 @@ abstract class AbstractDescriptorTest extends TestCase
         $data = $this->getDescriptionTestData(ObjectsProvider::getContainerParameter());
 
         $file = array_pop($data[0]);
-        $data[0][] = array('parameter' => 'database_name');
+        $data[0][] = ['parameter' => 'database_name'];
         $data[0][] = $file;
         $file = array_pop($data[1]);
-        $data[1][] = array('parameter' => 'twig.form.resources');
+        $data[1][] = ['parameter' => 'twig.form.resources'];
         $data[1][] = $file;
 
         return $data;
@@ -203,26 +203,26 @@ abstract class AbstractDescriptorTest extends TestCase
 
     public function getClassDescriptionTestData()
     {
-        return array(
-            array(ClassWithDocCommentOnMultipleLines::class, 'This is the first line of the description. This is the second line.'),
-            array(ClassWithDocCommentWithoutInitialSpace::class, 'Foo.'),
-            array(ClassWithoutDocComment::class, ''),
-            array(ClassWithDocComment::class, 'This is a class with a doc comment.'),
-        );
+        return [
+            [ClassWithDocCommentOnMultipleLines::class, 'This is the first line of the description. This is the second line.'],
+            [ClassWithDocCommentWithoutInitialSpace::class, 'Foo.'],
+            [ClassWithoutDocComment::class, ''],
+            [ClassWithDocComment::class, 'This is a class with a doc comment.'],
+        ];
     }
 
     abstract protected function getDescriptor();
 
     abstract protected function getFormat();
 
-    private function assertDescription($expectedDescription, $describedObject, array $options = array())
+    private function assertDescription($expectedDescription, $describedObject, array $options = [])
     {
         $options['raw_output'] = true;
         $options['raw_text'] = true;
         $output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, true);
 
         if ('txt' === $this->getFormat()) {
-            $options['output'] = new SymfonyStyle(new ArrayInput(array()), $output);
+            $options['output'] = new SymfonyStyle(new ArrayInput([]), $output);
         }
 
         $this->getDescriptor()->describe($output, $describedObject, $options);
@@ -236,11 +236,11 @@ abstract class AbstractDescriptorTest extends TestCase
 
     private function getDescriptionTestData(array $objects)
     {
-        $data = array();
+        $data = [];
         foreach ($objects as $name => $object) {
             $file = sprintf('%s.%s', trim($name, '.'), $this->getFormat());
             $description = file_get_contents(__DIR__.'/../../Fixtures/Descriptor/'.$file);
-            $data[] = array($object, $description, $file);
+            $data[] = [$object, $description, $file];
         }
 
         return $data;
@@ -248,20 +248,20 @@ abstract class AbstractDescriptorTest extends TestCase
 
     private function getContainerBuilderDescriptionTestData(array $objects)
     {
-        $variations = array(
-            'services' => array('show_hidden' => true),
-            'public' => array('show_hidden' => false),
-            'tag1' => array('show_hidden' => true, 'tag' => 'tag1'),
-            'tags' => array('group_by' => 'tags', 'show_hidden' => true),
-            'arguments' => array('show_hidden' => false, 'show_arguments' => true),
-        );
+        $variations = [
+            'services' => ['show_hidden' => true],
+            'public' => ['show_hidden' => false],
+            'tag1' => ['show_hidden' => true, 'tag' => 'tag1'],
+            'tags' => ['group_by' => 'tags', 'show_hidden' => true],
+            'arguments' => ['show_hidden' => false, 'show_arguments' => true],
+        ];
 
-        $data = array();
+        $data = [];
         foreach ($objects as $name => $object) {
             foreach ($variations as $suffix => $options) {
                 $file = sprintf('%s_%s.%s', trim($name, '.'), $suffix, $this->getFormat());
                 $description = file_get_contents(__DIR__.'/../../Fixtures/Descriptor/'.$file);
-                $data[] = array($object, $description, $options, $file);
+                $data[] = [$object, $description, $options, $file];
             }
         }
 
@@ -270,17 +270,17 @@ abstract class AbstractDescriptorTest extends TestCase
 
     private function getEventDispatcherDescriptionTestData(array $objects)
     {
-        $variations = array(
-            'events' => array(),
-            'event1' => array('event' => 'event1'),
-        );
+        $variations = [
+            'events' => [],
+            'event1' => ['event' => 'event1'],
+        ];
 
-        $data = array();
+        $data = [];
         foreach ($objects as $name => $object) {
             foreach ($variations as $suffix => $options) {
                 $file = sprintf('%s_%s.%s', trim($name, '.'), $suffix, $this->getFormat());
                 $description = file_get_contents(__DIR__.'/../../Fixtures/Descriptor/'.$file);
-                $data[] = array($object, $description, $options, $file);
+                $data[] = [$object, $description, $options, $file];
             }
         }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/ObjectsProvider.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/ObjectsProvider.php
index f0ad9a740c..caafff6842 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/ObjectsProvider.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Console/Descriptor/ObjectsProvider.php
@@ -31,60 +31,60 @@ class ObjectsProvider
             $collection1->add($name, $route);
         }
 
-        return array('route_collection_1' => $collection1);
+        return ['route_collection_1' => $collection1];
     }
 
     public static function getRoutes()
     {
-        return array(
+        return [
             'route_1' => new RouteStub(
                 '/hello/{name}',
-                array('name' => 'Joseph'),
-                array('name' => '[a-z]+'),
-                array('opt1' => 'val1', 'opt2' => 'val2'),
+                ['name' => 'Joseph'],
+                ['name' => '[a-z]+'],
+                ['opt1' => 'val1', 'opt2' => 'val2'],
                 'localhost',
-                array('http', 'https'),
-                array('get', 'head')
+                ['http', 'https'],
+                ['get', 'head']
             ),
             'route_2' => new RouteStub(
                 '/name/add',
-                array(),
-                array(),
-                array('opt1' => 'val1', 'opt2' => 'val2'),
+                [],
+                [],
+                ['opt1' => 'val1', 'opt2' => 'val2'],
                 'localhost',
-                array('http', 'https'),
-                array('put', 'post')
+                ['http', 'https'],
+                ['put', 'post']
             ),
-        );
+        ];
     }
 
     public static function getContainerParameters()
     {
-        return array(
-            'parameters_1' => new ParameterBag(array(
+        return [
+            'parameters_1' => new ParameterBag([
                 'integer' => 12,
                 'string' => 'Hello world!',
                 'boolean' => true,
-                'array' => array(12, 'Hello world!', true),
-            )),
-        );
+                'array' => [12, 'Hello world!', true],
+            ]),
+        ];
     }
 
     public static function getContainerParameter()
     {
         $builder = new ContainerBuilder();
         $builder->setParameter('database_name', 'symfony');
-        $builder->setParameter('twig.form.resources', array(
+        $builder->setParameter('twig.form.resources', [
             'bootstrap_3_horizontal_layout.html.twig',
             'bootstrap_3_layout.html.twig',
             'form_div_layout.html.twig',
             'form_table_layout.html.twig',
-        ));
+        ]);
 
-        return array(
+        return [
             'parameter' => $builder,
             'array_parameter' => $builder,
-        );
+        ];
     }
 
     public static function getContainerBuilders()
@@ -93,15 +93,15 @@ class ObjectsProvider
         $builder1->setDefinitions(self::getContainerDefinitions());
         $builder1->setAliases(self::getContainerAliases());
 
-        return array('builder_1' => $builder1);
+        return ['builder_1' => $builder1];
     }
 
     public static function getContainerDefinitionsWithExistingClasses()
     {
-        return array(
+        return [
             'existing_class_def_1' => new Definition(ClassWithDocComment::class),
             'existing_class_def_2' => new Definition(ClassWithoutDocComment::class),
-        );
+        ];
     }
 
     public static function getContainerDefinitions()
@@ -109,7 +109,7 @@ class ObjectsProvider
         $definition1 = new Definition('Full\\Qualified\\Class1');
         $definition2 = new Definition('Full\\Qualified\\Class2');
 
-        return array(
+        return [
             'definition_1' => $definition1
                 ->setPublic(true)
                 ->setSynthetic(false)
@@ -117,37 +117,37 @@ class ObjectsProvider
                 ->setAbstract(true)
                 ->addArgument(new Reference('.definition_2'))
                 ->addArgument('%parameter%')
-                ->addArgument(new Definition('inline_service', array('arg1', 'arg2')))
-                ->addArgument(array(
+                ->addArgument(new Definition('inline_service', ['arg1', 'arg2']))
+                ->addArgument([
                     'foo',
                     new Reference('.definition_2'),
                     new Definition('inline_service'),
-                ))
-                ->addArgument(new IteratorArgument(array(
+                ])
+                ->addArgument(new IteratorArgument([
                     new Reference('definition_1'),
                     new Reference('.definition_2'),
-                )))
-                ->setFactory(array('Full\\Qualified\\FactoryClass', 'get')),
+                ]))
+                ->setFactory(['Full\\Qualified\\FactoryClass', 'get']),
             '.definition_2' => $definition2
                 ->setPublic(false)
                 ->setSynthetic(true)
                 ->setFile('/path/to/file')
                 ->setLazy(false)
                 ->setAbstract(false)
-                ->addTag('tag1', array('attr1' => 'val1', 'attr2' => 'val2'))
-                ->addTag('tag1', array('attr3' => 'val3'))
+                ->addTag('tag1', ['attr1' => 'val1', 'attr2' => 'val2'])
+                ->addTag('tag1', ['attr3' => 'val3'])
                 ->addTag('tag2')
-                ->addMethodCall('setMailer', array(new Reference('mailer')))
-                ->setFactory(array(new Reference('factory.service'), 'get')),
-        );
+                ->addMethodCall('setMailer', [new Reference('mailer')])
+                ->setFactory([new Reference('factory.service'), 'get']),
+        ];
     }
 
     public static function getContainerAliases()
     {
-        return array(
+        return [
             'alias_1' => new Alias('service_1', true),
             '.alias_2' => new Alias('.service_2', false),
-        );
+        ];
     }
 
     public static function getEventDispatchers()
@@ -158,21 +158,21 @@ class ObjectsProvider
         $eventDispatcher->addListener('event1', function () { return 'Closure'; }, -1);
         $eventDispatcher->addListener('event2', new CallableClass());
 
-        return array('event_dispatcher_1' => $eventDispatcher);
+        return ['event_dispatcher_1' => $eventDispatcher];
     }
 
     public static function getCallables()
     {
-        return array(
+        return [
             'callable_1' => 'array_key_exists',
-            'callable_2' => array('Symfony\\Bundle\\FrameworkBundle\\Tests\\Console\\Descriptor\\CallableClass', 'staticMethod'),
-            'callable_3' => array(new CallableClass(), 'method'),
+            'callable_2' => ['Symfony\\Bundle\\FrameworkBundle\\Tests\\Console\\Descriptor\\CallableClass', 'staticMethod'],
+            'callable_3' => [new CallableClass(), 'method'],
             'callable_4' => 'Symfony\\Bundle\\FrameworkBundle\\Tests\\Console\\Descriptor\\CallableClass::staticMethod',
-            'callable_5' => array('Symfony\\Bundle\\FrameworkBundle\\Tests\\Console\\Descriptor\\ExtendedCallableClass', 'parent::staticMethod'),
+            'callable_5' => ['Symfony\\Bundle\\FrameworkBundle\\Tests\\Console\\Descriptor\\ExtendedCallableClass', 'parent::staticMethod'],
             'callable_6' => function () { return 'Closure'; },
             'callable_7' => new CallableClass(),
             'callable_from_callable' => \Closure::fromCallable(new CallableClass()),
-        );
+        ];
     }
 }
 
@@ -202,7 +202,7 @@ class RouteStub extends Route
 {
     public function compile()
     {
-        return new CompiledRoute('', '#PATH_REGEX#', array(), array(), '#HOST_REGEX#');
+        return new CompiledRoute('', '#PATH_REGEX#', [], [], '#HOST_REGEX#');
     }
 }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/AbstractControllerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/AbstractControllerTest.php
index 03b451528d..ddab6af2b6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/AbstractControllerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/AbstractControllerTest.php
@@ -30,7 +30,7 @@ class AbstractControllerTest extends ControllerTraitTest
     public function testSubscribedServices()
     {
         $subscribed = AbstractController::getSubscribedServices();
-        $expectedServices = array(
+        $expectedServices = [
             'router' => '?Symfony\\Component\\Routing\\RouterInterface',
             'request_stack' => '?Symfony\\Component\\HttpFoundation\\RequestStack',
             'http_kernel' => '?Symfony\\Component\\HttpKernel\\HttpKernelInterface',
@@ -45,7 +45,7 @@ class AbstractControllerTest extends ControllerTraitTest
             'message_bus' => '?Symfony\\Component\\Messenger\\MessageBusInterface',
             'security.token_storage' => '?Symfony\\Component\\Security\\Core\\Authentication\\Token\\Storage\\TokenStorageInterface',
             'security.csrf.token_manager' => '?Symfony\\Component\\Security\\Csrf\\CsrfTokenManagerInterface',
-        );
+        ];
 
         $this->assertEquals($expectedServices, $subscribed, 'Subscribed core services in AbstractController have changed');
     }
@@ -56,7 +56,7 @@ class AbstractControllerTest extends ControllerTraitTest
             $this->markTestSkipped('ContainerBag class does not exist');
         }
 
-        $container = new Container(new FrozenParameterBag(array('foo' => 'bar')));
+        $container = new Container(new FrozenParameterBag(['foo' => 'bar']));
         $container->set('parameter_bag', new ContainerBag($container));
 
         $controller = $this->createController();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerNameParserTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerNameParserTest.php
index 306f40df15..5e65ae5f13 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerNameParserTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerNameParserTest.php
@@ -102,13 +102,13 @@ class ControllerNameParserTest extends TestCase
     public function getMissingControllersTest()
     {
         // a normal bundle
-        $bundles = array(
-            array('FooBundle:Fake:index'),
-        );
+        $bundles = [
+            ['FooBundle:Fake:index'],
+        ];
 
         // a bundle with children
         if (Kernel::VERSION_ID < 40000) {
-            $bundles[] = array('SensioFooBundle:Fake:index');
+            $bundles[] = ['SensioFooBundle:Fake:index'];
         }
 
         return $bundles;
@@ -138,18 +138,18 @@ class ControllerNameParserTest extends TestCase
 
     public function getInvalidBundleNameTests()
     {
-        return array(
-            'Alternative will be found using levenshtein' => array('FoodBundle:Default:index', 'FooBundle:Default:index'),
-            'Bundle does not exist at all' => array('CrazyBundle:Default:index', false),
-        );
+        return [
+            'Alternative will be found using levenshtein' => ['FoodBundle:Default:index', 'FooBundle:Default:index'],
+            'Bundle does not exist at all' => ['CrazyBundle:Default:index', false],
+        ];
     }
 
     private function createParser()
     {
-        $bundles = array(
+        $bundles = [
             'SensioCmsFooBundle' => $this->getBundle('TestBundle\Sensio\Cms\FooBundle', 'SensioCmsFooBundle'),
             'FooBundle' => $this->getBundle('TestBundle\FooBundle', 'FooBundle'),
-        );
+        ];
 
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\KernelInterface')->getMock();
         $kernel
@@ -164,11 +164,11 @@ class ControllerNameParserTest extends TestCase
             }))
         ;
 
-        $bundles = array(
+        $bundles = [
             'SensioCmsFooBundle' => $this->getBundle('TestBundle\Sensio\Cms\FooBundle', 'SensioCmsFooBundle'),
             'FoooooBundle' => $this->getBundle('TestBundle\FooBundle', 'FoooooBundle'),
             'FooBundle' => $this->getBundle('TestBundle\FooBundle', 'FooBundle'),
-        );
+        ];
         $kernel
             ->expects($this->any())
             ->method('getBundles')
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
index d5d35cf4e2..02f09a4fb3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/ControllerResolverTest.php
@@ -88,7 +88,7 @@ class ControllerResolverTest extends ContainerControllerResolverTest
         $request = Request::create('/');
         $request->attributes->set('_controller', TestAbstractController::class.'::testAction');
 
-        $this->assertSame(array($controller, 'testAction'), $resolver->getController($request));
+        $this->assertSame([$controller, 'testAction'], $resolver->getController($request));
         $this->assertSame($container, $controller->getContainer());
     }
 
@@ -110,7 +110,7 @@ class ControllerResolverTest extends ContainerControllerResolverTest
         $request = Request::create('/');
         $request->attributes->set('_controller', TestAbstractController::class.'::fooAction');
 
-        $this->assertSame(array($controller, 'fooAction'), $resolver->getController($request));
+        $this->assertSame([$controller, 'fooAction'], $resolver->getController($request));
         $this->assertSame($container, $controller->setContainer($container));
     }
 
@@ -132,7 +132,7 @@ class ControllerResolverTest extends ContainerControllerResolverTest
         $request = Request::create('/');
         $request->attributes->set('_controller', DummyController::class.'::fooAction');
 
-        $this->assertSame(array($controller, 'fooAction'), $resolver->getController($request));
+        $this->assertSame([$controller, 'fooAction'], $resolver->getController($request));
         $this->assertSame($container, $controller->getContainer());
     }
 
@@ -152,7 +152,7 @@ class ControllerResolverTest extends ContainerControllerResolverTest
         $request = Request::create('/');
         $request->attributes->set('_controller', TestAbstractController::class.'::fooAction');
 
-        $this->assertSame(array($controller, 'fooAction'), $resolver->getController($request));
+        $this->assertSame([$controller, 'fooAction'], $resolver->getController($request));
         $this->assertSame($controllerContainer, $controller->setContainer($container));
     }
 
@@ -172,7 +172,7 @@ class ControllerResolverTest extends ContainerControllerResolverTest
         $request = Request::create('/');
         $request->attributes->set('_controller', DummyController::class.'::fooAction');
 
-        $this->assertSame(array($controller, 'fooAction'), $resolver->getController($request));
+        $this->assertSame([$controller, 'fooAction'], $resolver->getController($request));
         $this->assertSame($controllerContainer, $controller->getContainer());
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/RedirectControllerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/RedirectControllerTest.php
index ed2cf1e76c..1d8f899894 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/RedirectControllerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Controller/RedirectControllerTest.php
@@ -53,19 +53,19 @@ class RedirectControllerTest extends TestCase
 
         $route = 'new-route';
         $url = '/redirect-url';
-        $attributes = array(
+        $attributes = [
             'route' => $route,
             'permanent' => $permanent,
             '_route' => 'current-route',
-            '_route_params' => array(
+            '_route_params' => [
                 'route' => $route,
                 'permanent' => $permanent,
                 'additional-parameter' => 'value',
                 'ignoreAttributes' => $ignoreAttributes,
                 'keepRequestMethod' => $keepRequestMethod,
                 'keepQueryParams' => $keepQueryParams,
-            ),
-        );
+            ],
+        ];
 
         $request->attributes = new ParameterBag($attributes);
 
@@ -86,16 +86,16 @@ class RedirectControllerTest extends TestCase
 
     public function provider()
     {
-        return array(
-            array(true, false, false, false, 301, array('additional-parameter' => 'value')),
-            array(false, false, false, false, 302, array('additional-parameter' => 'value')),
-            array(false, false, false, true, 302, array()),
-            array(false, false, false, array('additional-parameter'), 302, array()),
-            array(true, true, false, false, 308, array('additional-parameter' => 'value')),
-            array(false, true, false, false, 307, array('additional-parameter' => 'value')),
-            array(false, true, false, true, 307, array()),
-            array(false, true, true, array('additional-parameter'), 307, array()),
-        );
+        return [
+            [true, false, false, false, 301, ['additional-parameter' => 'value']],
+            [false, false, false, false, 302, ['additional-parameter' => 'value']],
+            [false, false, false, true, 302, []],
+            [false, false, false, ['additional-parameter'], 302, []],
+            [true, true, false, false, 308, ['additional-parameter' => 'value']],
+            [false, true, false, false, 307, ['additional-parameter' => 'value']],
+            [false, true, false, true, 307, []],
+            [false, true, true, ['additional-parameter'], 307, []],
+        ];
     }
 
     public function testEmptyPath()
@@ -161,33 +161,33 @@ class RedirectControllerTest extends TestCase
 
     public function urlRedirectProvider()
     {
-        return array(
+        return [
             // Standard ports
-            array('http',  null, null,  'http',  80,   ''),
-            array('http',  80,   null,  'http',  80,   ''),
-            array('https', null, null,  'http',  80,   ''),
-            array('https', 80,   null,  'http',  80,   ''),
+            ['http',  null, null,  'http',  80,   ''],
+            ['http',  80,   null,  'http',  80,   ''],
+            ['https', null, null,  'http',  80,   ''],
+            ['https', 80,   null,  'http',  80,   ''],
 
-            array('http',  null,  null, 'https', 443,  ''),
-            array('http',  null,  443,  'https', 443,  ''),
-            array('https', null,  null, 'https', 443,  ''),
-            array('https', null,  443,  'https', 443,  ''),
+            ['http',  null,  null, 'https', 443,  ''],
+            ['http',  null,  443,  'https', 443,  ''],
+            ['https', null,  null, 'https', 443,  ''],
+            ['https', null,  443,  'https', 443,  ''],
 
             // Non-standard ports
-            array('http',  null,  null, 'http',  8080, ':8080'),
-            array('http',  4080,  null, 'http',  8080, ':4080'),
-            array('http',  80,    null, 'http',  8080, ''),
-            array('https', null,  null, 'http',  8080, ''),
-            array('https', null,  8443, 'http',  8080, ':8443'),
-            array('https', null,  443,  'http',  8080, ''),
+            ['http',  null,  null, 'http',  8080, ':8080'],
+            ['http',  4080,  null, 'http',  8080, ':4080'],
+            ['http',  80,    null, 'http',  8080, ''],
+            ['https', null,  null, 'http',  8080, ''],
+            ['https', null,  8443, 'http',  8080, ':8443'],
+            ['https', null,  443,  'http',  8080, ''],
 
-            array('https', null,  null, 'https', 8443, ':8443'),
-            array('https', null,  4443, 'https', 8443, ':4443'),
-            array('https', null,  443,  'https', 8443, ''),
-            array('http',  null,  null, 'https', 8443, ''),
-            array('http',  8080,  4443, 'https', 8443, ':8080'),
-            array('http',  80,    4443, 'https', 8443, ''),
-        );
+            ['https', null,  null, 'https', 8443, ':8443'],
+            ['https', null,  4443, 'https', 8443, ':4443'],
+            ['https', null,  443,  'https', 8443, ''],
+            ['http',  null,  null, 'https', 8443, ''],
+            ['http',  8080,  4443, 'https', 8443, ':8080'],
+            ['http',  80,    4443, 'https', 8443, ''],
+        ];
     }
 
     /**
@@ -209,13 +209,13 @@ class RedirectControllerTest extends TestCase
 
     public function pathQueryParamsProvider()
     {
-        return array(
-            array('http://www.example.com/base/redirect-path', '/redirect-path',  ''),
-            array('http://www.example.com/base/redirect-path?foo=bar', '/redirect-path?foo=bar',  ''),
-            array('http://www.example.com/base/redirect-path?foo=bar', '/redirect-path', 'foo=bar'),
-            array('http://www.example.com/base/redirect-path?foo=bar&abc=example', '/redirect-path?foo=bar', 'abc=example'),
-            array('http://www.example.com/base/redirect-path?foo=bar&abc=example&baz=def', '/redirect-path?foo=bar', 'abc=example&baz=def'),
-        );
+        return [
+            ['http://www.example.com/base/redirect-path', '/redirect-path',  ''],
+            ['http://www.example.com/base/redirect-path?foo=bar', '/redirect-path?foo=bar',  ''],
+            ['http://www.example.com/base/redirect-path?foo=bar', '/redirect-path', 'foo=bar'],
+            ['http://www.example.com/base/redirect-path?foo=bar&abc=example', '/redirect-path?foo=bar', 'abc=example'],
+            ['http://www.example.com/base/redirect-path?foo=bar&abc=example&baz=def', '/redirect-path?foo=bar', 'abc=example&baz=def'],
+        ];
     }
 
     /**
@@ -244,10 +244,10 @@ class RedirectControllerTest extends TestCase
         $port = 80;
 
         $request = $this->createRequestObject($scheme, $host, $port, $baseUrl, 'base=zaza');
-        $request->query = new ParameterBag(array('base' => 'zaza'));
-        $request->attributes = new ParameterBag(array('_route_params' => array('base2' => 'zaza')));
+        $request->query = new ParameterBag(['base' => 'zaza']);
+        $request->attributes = new ParameterBag(['_route_params' => ['base2' => 'zaza']]);
         $urlGenerator = $this->getMockBuilder(UrlGeneratorInterface::class)->getMock();
-        $urlGenerator->expects($this->once())->method('generate')->will($this->returnValue('/test?base=zaza&base2=zaza'))->with('/test', array('base' => 'zaza', 'base2' => 'zaza'), UrlGeneratorInterface::ABSOLUTE_URL);
+        $urlGenerator->expects($this->once())->method('generate')->will($this->returnValue('/test?base=zaza&base2=zaza'))->with('/test', ['base' => 'zaza', 'base2' => 'zaza'], UrlGeneratorInterface::ABSOLUTE_URL);
 
         $controller = new RedirectController($urlGenerator);
         $this->assertRedirectUrl($controller->redirectAction($request, '/test', false, false, false, true), '/test?base=zaza&base2=zaza');
@@ -261,10 +261,10 @@ class RedirectControllerTest extends TestCase
         $port = 80;
 
         $request = $this->createRequestObject($scheme, $host, $port, $baseUrl, 'base=zaza');
-        $request->query = new ParameterBag(array('base' => 'zaza'));
-        $request->attributes = new ParameterBag(array('_route_params' => array('base' => 'zouzou')));
+        $request->query = new ParameterBag(['base' => 'zaza']);
+        $request->attributes = new ParameterBag(['_route_params' => ['base' => 'zouzou']]);
         $urlGenerator = $this->getMockBuilder(UrlGeneratorInterface::class)->getMock();
-        $urlGenerator->expects($this->once())->method('generate')->will($this->returnValue('/test?base=zouzou'))->with('/test', array('base' => 'zouzou'), UrlGeneratorInterface::ABSOLUTE_URL);
+        $urlGenerator->expects($this->once())->method('generate')->will($this->returnValue('/test?base=zouzou'))->with('/test', ['base' => 'zouzou'], UrlGeneratorInterface::ABSOLUTE_URL);
 
         $controller = new RedirectController($urlGenerator);
         $this->assertRedirectUrl($controller->redirectAction($request, '/test', false, false, false, true), '/test?base=zouzou');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CacheCollectorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CacheCollectorPassTest.php
index 4552bae56a..d7613d5ae5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CacheCollectorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CacheCollectorPassTest.php
@@ -40,10 +40,10 @@ class CacheCollectorPassTest extends TestCase
         $collector = $container->register('data_collector.cache', CacheDataCollector::class);
         (new CacheCollectorPass())->process($container);
 
-        $this->assertEquals(array(
-            array('addInstance', array('fs', new Reference('fs'))),
-            array('addInstance', array('tagged_fs', new Reference('tagged_fs'))),
-        ), $collector->getMethodCalls());
+        $this->assertEquals([
+            ['addInstance', ['fs', new Reference('fs')]],
+            ['addInstance', ['tagged_fs', new Reference('tagged_fs')]],
+        ], $collector->getMethodCalls());
 
         $this->assertSame(TraceableAdapter::class, $container->findDefinition('fs')->getClass());
         $this->assertSame(TraceableTagAwareAdapter::class, $container->getDefinition('tagged_fs')->getClass());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php
index 67aa34cf5b..494cf6f094 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolClearerPassTest.php
@@ -37,18 +37,18 @@ class CachePoolClearerPassTest extends TestCase
 
         $publicPool = new Definition();
         $publicPool->addArgument('namespace');
-        $publicPool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $publicPool->addTag('cache.pool', ['clearer' => 'clearer_alias']);
         $container->setDefinition('public.pool', $publicPool);
 
         $publicPool = new Definition();
         $publicPool->addArgument('namespace');
-        $publicPool->addTag('cache.pool', array('clearer' => 'clearer_alias', 'name' => 'pool2'));
+        $publicPool->addTag('cache.pool', ['clearer' => 'clearer_alias', 'name' => 'pool2']);
         $container->setDefinition('public.pool2', $publicPool);
 
         $privatePool = new Definition();
         $privatePool->setPublic(false);
         $privatePool->addArgument('namespace');
-        $privatePool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $privatePool->addTag('cache.pool', ['clearer' => 'clearer_alias']);
         $container->setDefinition('private.pool', $privatePool);
 
         $clearer = new Definition();
@@ -58,18 +58,18 @@ class CachePoolClearerPassTest extends TestCase
         $pass = new RemoveUnusedDefinitionsPass();
         foreach ($container->getCompiler()->getPassConfig()->getRemovingPasses() as $removingPass) {
             if ($removingPass instanceof RepeatedPass) {
-                $pass->setRepeatedPass(new RepeatedPass(array($pass)));
+                $pass->setRepeatedPass(new RepeatedPass([$pass]));
                 break;
             }
         }
-        foreach (array(new CachePoolPass(), $pass, new CachePoolClearerPass()) as $pass) {
+        foreach ([new CachePoolPass(), $pass, new CachePoolClearerPass()] as $pass) {
             $pass->process($container);
         }
 
-        $expected = array(array(
+        $expected = [[
             'public.pool' => new Reference('public.pool'),
             'pool2' => new Reference('public.pool2'),
-        ));
+        ]];
         $this->assertEquals($expected, $clearer->getArguments());
         $this->assertEquals($expected, $globalClearer->getArguments());
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
index 273329b182..747e29ffef 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPassTest.php
@@ -74,10 +74,10 @@ class CachePoolPassTest extends TestCase
         $container->setParameter('kernel.container_class', 'app');
         $container->setParameter('cache.prefix.seed', 'foo');
         $cachePool = new Definition();
-        $cachePool->addTag('cache.pool', array(
+        $cachePool->addTag('cache.pool', [
             'provider' => 'foobar',
             'default_lifetime' => 3,
-        ));
+        ]);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
@@ -97,10 +97,10 @@ class CachePoolPassTest extends TestCase
         $container->setParameter('kernel.container_class', 'app');
         $container->setParameter('cache.prefix.seed', 'foo');
         $cachePool = new Definition();
-        $cachePool->addTag('cache.pool', array(
+        $cachePool->addTag('cache.pool', [
             'name' => 'foobar',
             'provider' => 'foobar',
-        ));
+        ]);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
@@ -125,7 +125,7 @@ class CachePoolPassTest extends TestCase
         $adapter->addTag('cache.pool');
         $container->setDefinition('app.cache_adapter', $adapter);
         $cachePool = new ChildDefinition('app.cache_adapter');
-        $cachePool->addTag('cache.pool', array('foobar' => 123));
+        $cachePool->addTag('cache.pool', ['foobar' => 123]);
         $container->setDefinition('app.cache_pool', $cachePool);
 
         $this->cachePoolPass->process($container);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPrunerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPrunerPassTest.php
index 6725ef1ad8..58362df6ed 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPrunerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/CachePoolPrunerPassTest.php
@@ -27,17 +27,17 @@ class CachePoolPrunerPassTest extends TestCase
     public function testCompilerPassReplacesCommandArgument()
     {
         $container = new ContainerBuilder();
-        $container->register('console.command.cache_pool_prune')->addArgument(array());
+        $container->register('console.command.cache_pool_prune')->addArgument([]);
         $container->register('pool.foo', FilesystemAdapter::class)->addTag('cache.pool');
         $container->register('pool.bar', PhpFilesAdapter::class)->addTag('cache.pool');
 
         $pass = new CachePoolPrunerPass();
         $pass->process($container);
 
-        $expected = array(
+        $expected = [
             'pool.foo' => new Reference('pool.foo'),
             'pool.bar' => new Reference('pool.bar'),
-        );
+        ];
         $argument = $container->getDefinition('console.command.cache_pool_prune')->getArgument(0);
 
         $this->assertInstanceOf(IteratorArgument::class, $argument);
@@ -66,7 +66,7 @@ class CachePoolPrunerPassTest extends TestCase
     public function testCompilerPassThrowsOnInvalidDefinitionClass()
     {
         $container = new ContainerBuilder();
-        $container->register('console.command.cache_pool_prune')->addArgument(array());
+        $container->register('console.command.cache_pool_prune')->addArgument([]);
         $container->register('pool.not-found', NotFound::class)->addTag('cache.pool');
 
         $pass = new CachePoolPrunerPass();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
index 481500c2cb..4496c7927e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/DataCollectorTranslatorPassTest.php
@@ -33,11 +33,11 @@ class DataCollectorTranslatorPassTest extends TestCase
         $this->container->register('translator.data_collector', 'Symfony\Component\Translation\DataCollectorTranslator')
             ->setPublic(false)
             ->setDecoratedService('translator')
-            ->setArguments(array(new Reference('translator.data_collector.inner')))
+            ->setArguments([new Reference('translator.data_collector.inner')])
         ;
 
         $this->container->register('data_collector.translation', 'Symfony\Component\Translation\DataCollector\TranslationDataCollector')
-            ->setArguments(array(new Reference('translator.data_collector')))
+            ->setArguments([new Reference('translator.data_collector')])
         ;
     }
 
@@ -67,10 +67,10 @@ class DataCollectorTranslatorPassTest extends TestCase
 
     public function getImplementingTranslatorBagInterfaceTranslatorClassNames()
     {
-        return array(
-            array('Symfony\Component\Translation\Translator'),
-            array('%translator_implementing_bag%'),
-        );
+        return [
+            ['Symfony\Component\Translation\Translator'],
+            ['%translator_implementing_bag%'],
+        ];
     }
 
     /**
@@ -99,16 +99,16 @@ class DataCollectorTranslatorPassTest extends TestCase
 
     public function getNotImplementingTranslatorBagInterfaceTranslatorClassNames()
     {
-        return array(
-            array('Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler\TranslatorWithTranslatorBag'),
-            array('%translator_not_implementing_bag%'),
-        );
+        return [
+            ['Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\Compiler\TranslatorWithTranslatorBag'],
+            ['%translator_not_implementing_bag%'],
+        ];
     }
 }
 
 class TranslatorWithTranslatorBag implements TranslatorInterface
 {
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
index 7788df0c7b..6838d47883 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/LoggingTranslatorPassTest.php
@@ -30,17 +30,17 @@ class LoggingTranslatorPassTest extends TestCase
         $container->setAlias('translator', 'translator.default');
         $translationWarmerDefinition = $container->register('translation.warmer')
             ->addArgument(new Reference('translator'))
-            ->addTag('container.service_subscriber', array('id' => 'translator'))
-            ->addTag('container.service_subscriber', array('id' => 'foo'));
+            ->addTag('container.service_subscriber', ['id' => 'translator'])
+            ->addTag('container.service_subscriber', ['id' => 'foo']);
 
         $pass = new LoggingTranslatorPass();
         $pass->process($container);
 
         $this->assertEquals(
-            array('container.service_subscriber' => array(
-                array('id' => 'foo'),
-                array('key' => 'translator', 'id' => 'translator.logging.inner'),
-            )),
+            ['container.service_subscriber' => [
+                ['id' => 'foo'],
+                ['key' => 'translator', 'id' => 'translator.logging.inner'],
+            ]],
             $translationWarmerDefinition->getTags()
         );
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
index f46779ada1..b693165f8b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/ProfilerPassTest.php
@@ -32,7 +32,7 @@ class ProfilerPassTest extends TestCase
         $builder = new ContainerBuilder();
         $builder->register('profiler', 'ProfilerClass');
         $builder->register('my_collector_service')
-            ->addTag('data_collector', array('template' => 'foo'));
+            ->addTag('data_collector', ['template' => 'foo']);
 
         $profilerPass = new ProfilerPass();
         $profilerPass->process($builder);
@@ -43,12 +43,12 @@ class ProfilerPassTest extends TestCase
         $container = new ContainerBuilder();
         $profilerDefinition = $container->register('profiler', 'ProfilerClass');
         $container->register('my_collector_service')
-            ->addTag('data_collector', array('template' => 'foo', 'id' => 'my_collector'));
+            ->addTag('data_collector', ['template' => 'foo', 'id' => 'my_collector']);
 
         $profilerPass = new ProfilerPass();
         $profilerPass->process($container);
 
-        $this->assertSame(array('my_collector_service' => array('my_collector', 'foo')), $container->getParameter('data_collector.templates'));
+        $this->assertSame(['my_collector_service' => ['my_collector', 'foo']], $container->getParameter('data_collector.templates'));
 
         // grab the method calls off of the "profiler" definition
         $methodCalls = $profilerDefinition->getMethodCalls();
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TestServiceContainerRefPassesTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TestServiceContainerRefPassesTest.php
index d63ad4aabc..70dbe1412c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TestServiceContainerRefPassesTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/TestServiceContainerRefPassesTest.php
@@ -27,7 +27,7 @@ class TestServiceContainerRefPassesTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('test.private_services_locator', ServiceLocator::class)
             ->setPublic(true)
-            ->addArgument(0, array());
+            ->addArgument(0, []);
 
         $container->addCompilerPass(new TestServiceContainerWeakRefPass(), PassConfig::TYPE_BEFORE_REMOVING, -32);
         $container->addCompilerPass(new TestServiceContainerRealRefPass(), PassConfig::TYPE_AFTER_REMOVING);
@@ -45,12 +45,12 @@ class TestServiceContainerRefPassesTest extends TestCase
 
         $container->compile();
 
-        $expected = array(
+        $expected = [
             'Test\private_used_shared_service' => new ServiceClosureArgument(new Reference('Test\private_used_shared_service')),
             'Test\private_used_non_shared_service' => new ServiceClosureArgument(new Reference('Test\private_used_non_shared_service')),
             'Psr\Container\ContainerInterface' => new ServiceClosureArgument(new Reference('service_container')),
             'Symfony\Component\DependencyInjection\ContainerInterface' => new ServiceClosureArgument(new Reference('service_container')),
-        );
+        ];
         $this->assertEquals($expected, $container->getDefinition('test.private_services_locator')->getArgument(0));
         $this->assertSame($container, $container->get('test.private_services_locator')->get('Psr\Container\ContainerInterface'));
         $this->assertFalse($container->getDefinition('Test\private_used_non_shared_service')->isShared());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
index d91c806bc8..1377a62882 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Compiler/UnusedTagsPassTest.php
@@ -29,6 +29,6 @@ class UnusedTagsPassTest extends TestCase
 
         $pass->process($container);
 
-        $this->assertSame(array(sprintf('%s: Tag "kenrel.event_subscriber" was defined on service(s) "foo", "bar", but was never used. Did you mean "kernel.event_subscriber"?', UnusedTagsPass::class)), $container->getCompiler()->getLog());
+        $this->assertSame([sprintf('%s: Tag "kenrel.event_subscriber" was defined on service(s) "foo", "bar", but was never used. Did you mean "kernel.event_subscriber"?', UnusedTagsPass::class)], $container->getCompiler()->getLog());
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
index 9a3b2183e1..453ccf449d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -26,35 +26,35 @@ class ConfigurationTest extends TestCase
     public function testDefaultConfig()
     {
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(true), array(array('secret' => 's3cr3t')));
+        $config = $processor->processConfiguration(new Configuration(true), [['secret' => 's3cr3t']]);
 
         $this->assertEquals(
-            array_merge(array('secret' => 's3cr3t', 'trusted_hosts' => array()), self::getBundleDefaultConfig()),
+            array_merge(['secret' => 's3cr3t', 'trusted_hosts' => []], self::getBundleDefaultConfig()),
             $config
         );
     }
 
     public function testDoNoDuplicateDefaultFormResources()
     {
-        $input = array('templating' => array(
-            'form' => array('resources' => array('FrameworkBundle:Form')),
-            'engines' => array('php'),
-        ));
+        $input = ['templating' => [
+            'form' => ['resources' => ['FrameworkBundle:Form']],
+            'engines' => ['php'],
+        ]];
 
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(true), array($input));
+        $config = $processor->processConfiguration(new Configuration(true), [$input]);
 
-        $this->assertEquals(array('FrameworkBundle:Form'), $config['templating']['form']['resources']);
+        $this->assertEquals(['FrameworkBundle:Form'], $config['templating']['form']['resources']);
     }
 
     public function getTestValidSessionName()
     {
-        return array(
-            array(null),
-            array('PHPSESSID'),
-            array('a&b'),
-            array(',_-!@#$%^*(){}:<>/?'),
-        );
+        return [
+            [null],
+            ['PHPSESSID'],
+            ['a&b'],
+            [',_-!@#$%^*(){}:<>/?'],
+        ];
     }
 
     /**
@@ -66,38 +66,38 @@ class ConfigurationTest extends TestCase
         $processor = new Processor();
         $processor->processConfiguration(
             new Configuration(true),
-            array(array('session' => array('name' => $sessionName)))
+            [['session' => ['name' => $sessionName]]]
         );
     }
 
     public function getTestInvalidSessionName()
     {
-        return array(
-            array('a.b'),
-            array('a['),
-            array('a[]'),
-            array('a[b]'),
-            array('a=b'),
-            array('a+b'),
-        );
+        return [
+            ['a.b'],
+            ['a['],
+            ['a[]'],
+            ['a[b]'],
+            ['a=b'],
+            ['a+b'],
+        ];
     }
 
     public function testAssetsCanBeEnabled()
     {
         $processor = new Processor();
         $configuration = new Configuration(true);
-        $config = $processor->processConfiguration($configuration, array(array('assets' => null)));
+        $config = $processor->processConfiguration($configuration, [['assets' => null]]);
 
-        $defaultConfig = array(
+        $defaultConfig = [
             'enabled' => true,
             'version_strategy' => null,
             'version' => null,
             'version_format' => '%%s?%%s',
             'base_path' => '',
-            'base_urls' => array(),
-            'packages' => array(),
+            'base_urls' => [],
+            'packages' => [],
             'json_manifest_path' => null,
-        );
+        ];
 
         $this->assertEquals($defaultConfig, $config['assets']);
     }
@@ -116,120 +116,120 @@ class ConfigurationTest extends TestCase
 
         $processor = new Processor();
         $configuration = new Configuration(true);
-        $processor->processConfiguration($configuration, array(
-                array(
+        $processor->processConfiguration($configuration, [
+                [
                     'assets' => $assetConfig,
-                ),
-            ));
+                ],
+            ]);
     }
 
     public function provideInvalidAssetConfigurationTests()
     {
         // helper to turn config into embedded package config
         $createPackageConfig = function (array $packageConfig) {
-            return array(
+            return [
                 'base_urls' => '//example.com',
                 'version' => 1,
-                'packages' => array(
+                'packages' => [
                     'foo' => $packageConfig,
-                ),
-            );
+                ],
+            ];
         };
 
-        $config = array(
+        $config = [
             'version' => 1,
             'version_strategy' => 'foo',
-        );
-        yield array($config, 'You cannot use both "version_strategy" and "version" at the same time under "assets".');
-        yield array($createPackageConfig($config), 'You cannot use both "version_strategy" and "version" at the same time under "assets" packages.');
+        ];
+        yield [$config, 'You cannot use both "version_strategy" and "version" at the same time under "assets".'];
+        yield [$createPackageConfig($config), 'You cannot use both "version_strategy" and "version" at the same time under "assets" packages.'];
 
-        $config = array(
+        $config = [
             'json_manifest_path' => '/foo.json',
             'version_strategy' => 'foo',
-        );
-        yield array($config, 'You cannot use both "version_strategy" and "json_manifest_path" at the same time under "assets".');
-        yield array($createPackageConfig($config), 'You cannot use both "version_strategy" and "json_manifest_path" at the same time under "assets" packages.');
+        ];
+        yield [$config, 'You cannot use both "version_strategy" and "json_manifest_path" at the same time under "assets".'];
+        yield [$createPackageConfig($config), 'You cannot use both "version_strategy" and "json_manifest_path" at the same time under "assets" packages.'];
 
-        $config = array(
+        $config = [
             'json_manifest_path' => '/foo.json',
             'version' => '1',
-        );
-        yield array($config, 'You cannot use both "version" and "json_manifest_path" at the same time under "assets".');
-        yield array($createPackageConfig($config), 'You cannot use both "version" and "json_manifest_path" at the same time under "assets" packages.');
+        ];
+        yield [$config, 'You cannot use both "version" and "json_manifest_path" at the same time under "assets".'];
+        yield [$createPackageConfig($config), 'You cannot use both "version" and "json_manifest_path" at the same time under "assets" packages.'];
     }
 
     protected static function getBundleDefaultConfig()
     {
-        return array(
+        return [
             'http_method_override' => true,
             'ide' => null,
             'default_locale' => 'en',
-            'csrf_protection' => array(
+            'csrf_protection' => [
                 'enabled' => false,
-            ),
-            'form' => array(
+            ],
+            'form' => [
                 'enabled' => !class_exists(FullStack::class),
-                'csrf_protection' => array(
+                'csrf_protection' => [
                     'enabled' => null, // defaults to csrf_protection.enabled
                     'field_name' => '_token',
-                ),
-            ),
-            'esi' => array('enabled' => false),
-            'ssi' => array('enabled' => false),
-            'fragments' => array(
+                ],
+            ],
+            'esi' => ['enabled' => false],
+            'ssi' => ['enabled' => false],
+            'fragments' => [
                 'enabled' => false,
                 'path' => '/_fragment',
-            ),
-            'profiler' => array(
+            ],
+            'profiler' => [
                 'enabled' => false,
                 'only_exceptions' => false,
                 'only_master_requests' => false,
                 'dsn' => 'file:%kernel.cache_dir%/profiler',
                 'collect' => true,
-            ),
-            'translator' => array(
+            ],
+            'translator' => [
                 'enabled' => !class_exists(FullStack::class),
-                'fallbacks' => array('en'),
+                'fallbacks' => ['en'],
                 'logging' => false,
                 'formatter' => 'translator.formatter.default',
-                'paths' => array(),
+                'paths' => [],
                 'default_path' => '%kernel.project_dir%/translations',
-            ),
-            'validation' => array(
+            ],
+            'validation' => [
                 'enabled' => !class_exists(FullStack::class),
                 'enable_annotations' => !class_exists(FullStack::class),
-                'static_method' => array('loadValidatorMetadata'),
+                'static_method' => ['loadValidatorMetadata'],
                 'translation_domain' => 'validators',
-                'mapping' => array(
-                    'paths' => array(),
-                ),
-            ),
-            'annotations' => array(
+                'mapping' => [
+                    'paths' => [],
+                ],
+            ],
+            'annotations' => [
                 'cache' => 'php_array',
                 'file_cache_dir' => '%kernel.cache_dir%/annotations',
                 'debug' => true,
                 'enabled' => true,
-            ),
-            'serializer' => array(
+            ],
+            'serializer' => [
                 'enabled' => !class_exists(FullStack::class),
                 'enable_annotations' => !class_exists(FullStack::class),
-                'mapping' => array('paths' => array()),
-            ),
-            'property_access' => array(
+                'mapping' => ['paths' => []],
+            ],
+            'property_access' => [
                 'magic_call' => false,
                 'throw_exception_on_invalid_index' => false,
-            ),
-            'property_info' => array(
+            ],
+            'property_info' => [
                 'enabled' => !class_exists(FullStack::class),
-            ),
-            'router' => array(
+            ],
+            'router' => [
                 'enabled' => false,
                 'http_port' => 80,
                 'https_port' => 443,
                 'strict_requirements' => true,
                 'utf8' => false,
-            ),
-            'session' => array(
+            ],
+            'session' => [
                 'enabled' => false,
                 'storage_id' => 'session.storage.native',
                 'handler_id' => 'session.handler.native_file',
@@ -238,70 +238,70 @@ class ConfigurationTest extends TestCase
                 'gc_probability' => 1,
                 'save_path' => '%kernel.cache_dir%/sessions',
                 'metadata_update_threshold' => 0,
-            ),
-            'request' => array(
+            ],
+            'request' => [
                 'enabled' => false,
-                'formats' => array(),
-            ),
-            'templating' => array(
+                'formats' => [],
+            ],
+            'templating' => [
                 'enabled' => false,
                 'hinclude_default_template' => null,
-                'form' => array(
-                    'resources' => array('FrameworkBundle:Form'),
-                ),
-                'engines' => array(),
-                'loaders' => array(),
-            ),
-            'assets' => array(
+                'form' => [
+                    'resources' => ['FrameworkBundle:Form'],
+                ],
+                'engines' => [],
+                'loaders' => [],
+            ],
+            'assets' => [
                 'enabled' => !class_exists(FullStack::class),
                 'version_strategy' => null,
                 'version' => null,
                 'version_format' => '%%s?%%s',
                 'base_path' => '',
-                'base_urls' => array(),
-                'packages' => array(),
+                'base_urls' => [],
+                'packages' => [],
                 'json_manifest_path' => null,
-            ),
-            'cache' => array(
-                'pools' => array(),
+            ],
+            'cache' => [
+                'pools' => [],
                 'app' => 'cache.adapter.filesystem',
                 'system' => 'cache.adapter.system',
                 'directory' => '%kernel.cache_dir%/pools',
                 'default_redis_provider' => 'redis://localhost',
                 'default_memcached_provider' => 'memcached://localhost',
                 'default_pdo_provider' => class_exists(Connection::class) ? 'database_connection' : null,
-            ),
-            'workflows' => array(
+            ],
+            'workflows' => [
                 'enabled' => false,
-                'workflows' => array(),
-            ),
-            'php_errors' => array(
+                'workflows' => [],
+            ],
+            'php_errors' => [
                 'log' => true,
                 'throw' => true,
-            ),
-            'web_link' => array(
+            ],
+            'web_link' => [
                 'enabled' => !class_exists(FullStack::class),
-            ),
-            'lock' => array(
+            ],
+            'lock' => [
                 'enabled' => !class_exists(FullStack::class),
-                'resources' => array(
-                    'default' => array(
+                'resources' => [
+                    'default' => [
                         class_exists(SemaphoreStore::class) && SemaphoreStore::isSupported() ? 'semaphore' : 'flock',
-                    ),
-                ),
-            ),
-            'messenger' => array(
+                    ],
+                ],
+            ],
+            'messenger' => [
                 'enabled' => !class_exists(FullStack::class) && interface_exists(MessageBusInterface::class),
-                'routing' => array(),
-                'transports' => array(),
-                'serializer' => array(
+                'routing' => [],
+                'transports' => [],
+                'serializer' => [
                     'id' => !class_exists(FullStack::class) && class_exists(Serializer::class) ? 'messenger.transport.symfony_serializer' : null,
                     'format' => 'json',
-                    'context' => array(),
-                ),
+                    'context' => [],
+                ],
                 'default_bus' => null,
-                'buses' => array('messenger.bus.default' => array('default_middleware' => true, 'middleware' => array())),
-            ),
-        );
+                'buses' => ['messenger.bus.default' => ['default_middleware' => true, 'middleware' => []]],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets.php
index dc6bf7bb8d..c05c6fe3a1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets.php
@@ -1,32 +1,32 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'assets' => array(
+$container->loadFromExtension('framework', [
+    'assets' => [
         'version' => 'SomeVersionScheme',
         'base_urls' => 'http://cdn.example.com',
         'version_format' => '%%s?version=%%s',
-        'packages' => array(
-            'images_path' => array(
+        'packages' => [
+            'images_path' => [
                 'base_path' => '/foo',
-            ),
-            'images' => array(
+            ],
+            'images' => [
                 'version' => '1.0.0',
-                'base_urls' => array('http://images1.example.com', 'http://images2.example.com'),
-            ),
-            'foo' => array(
+                'base_urls' => ['http://images1.example.com', 'http://images2.example.com'],
+            ],
+            'foo' => [
                 'version' => '1.0.0',
                 'version_format' => '%%s-%%s',
-            ),
-            'bar' => array(
-                'base_urls' => array('https://bar2.example.com'),
-            ),
-            'bar_version_strategy' => array(
-                'base_urls' => array('https://bar2.example.com'),
+            ],
+            'bar' => [
+                'base_urls' => ['https://bar2.example.com'],
+            ],
+            'bar_version_strategy' => [
+                'base_urls' => ['https://bar2.example.com'],
                 'version_strategy' => 'assets.custom_version_strategy',
-            ),
-            'json_manifest_strategy' => array(
+            ],
+            'json_manifest_strategy' => [
                 'json_manifest_path' => '/path/to/manifest.json',
-            ),
-        ),
-    ),
-));
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_disabled.php
index 3ade7047a1..d10595fba9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_disabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'assets' => array(
+$container->loadFromExtension('framework', [
+    'assets' => [
         'enabled' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_version_strategy_as_service.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_version_strategy_as_service.php
index 4f9123aefb..b57f78ba47 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_version_strategy_as_service.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/assets_version_strategy_as_service.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'assets' => array(
+$container->loadFromExtension('framework', [
+    'assets' => [
         'version_strategy' => 'assets.custom_version_strategy',
         'base_urls' => 'http://cdn.example.com',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache.php
index ef7a1be190..2a85f849fa 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache.php
@@ -1,29 +1,29 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'cache' => array(
-        'pools' => array(
-            'cache.foo' => array(
+$container->loadFromExtension('framework', [
+    'cache' => [
+        'pools' => [
+            'cache.foo' => [
                 'adapter' => 'cache.adapter.apcu',
                 'default_lifetime' => 30,
-            ),
-            'cache.bar' => array(
+            ],
+            'cache.bar' => [
                 'adapter' => 'cache.adapter.doctrine',
                 'default_lifetime' => 5,
                 'provider' => 'app.doctrine_cache_provider',
-            ),
-            'cache.baz' => array(
+            ],
+            'cache.baz' => [
                 'adapter' => 'cache.adapter.filesystem',
                 'default_lifetime' => 7,
-            ),
-            'cache.foobar' => array(
+            ],
+            'cache.foobar' => [
                 'adapter' => 'cache.adapter.psr6',
                 'default_lifetime' => 10,
                 'provider' => 'app.cache_pool',
-            ),
-            'cache.def' => array(
+            ],
+            'cache.def' => [
                 'default_lifetime' => 11,
-            ),
-        ),
-    ),
-));
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache_env_var.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache_env_var.php
index b93ade8f4c..4f819e7204 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache_env_var.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/cache_env_var.php
@@ -2,8 +2,8 @@
 
 $container->setParameter('env(REDIS_URL)', 'redis://paas.com');
 
-$container->loadFromExtension('framework', array(
-    'cache' => array(
+$container->loadFromExtension('framework', [
+    'cache' => [
         'default_redis_provider' => '%env(REDIS_URL)%',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf.php
index 497ceb2b6e..886cb657b2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf.php
@@ -1,9 +1,9 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'csrf_protection' => true,
     'form' => true,
-    'session' => array(
+    'session' => [
         'handler_id' => null,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf_needs_session.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf_needs_session.php
index d1df1c5962..34fdb4c1f9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf_needs_session.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/csrf_needs_session.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'csrf_protection' => array(
+$container->loadFromExtension('framework', [
+    'csrf_protection' => [
         'enabled' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/default_config.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/default_config.php
index cd2e56bddf..4b2021df7b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/default_config.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/default_config.php
@@ -1,3 +1,3 @@
 <?php
 
-$container->loadFromExtension('framework', array());
+$container->loadFromExtension('framework', []);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_and_ssi_without_fragments.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_and_ssi_without_fragments.php
index b8f3aa0441..beada36b84 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_and_ssi_without_fragments.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_and_ssi_without_fragments.php
@@ -1,13 +1,13 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'fragments' => array(
+$container->loadFromExtension('framework', [
+    'fragments' => [
         'enabled' => false,
-    ),
-    'esi' => array(
+    ],
+    'esi' => [
         'enabled' => true,
-    ),
-    'ssi' => array(
+    ],
+    'ssi' => [
         'enabled' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_disabled.php
index 1fb5936fde..a24cd8158c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/esi_disabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'esi' => array(
+$container->loadFromExtension('framework', [
+    'esi' => [
         'enabled' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/form_no_csrf.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/form_no_csrf.php
index 7360c49c72..e0befdb320 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/form_no_csrf.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/form_no_csrf.php
@@ -1,9 +1,9 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'form' => array(
-        'csrf_protection' => array(
+$container->loadFromExtension('framework', [
+    'form' => [
+        'csrf_protection' => [
             'enabled' => false,
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/full.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/full.php
index add4179dcc..8684a569a9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/full.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/full.php
@@ -1,30 +1,30 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'secret' => 's3cr3t',
     'default_locale' => 'fr',
     'csrf_protection' => true,
-    'form' => array(
-        'csrf_protection' => array(
+    'form' => [
+        'csrf_protection' => [
             'field_name' => '_csrf',
-        ),
-    ),
+        ],
+    ],
     'http_method_override' => false,
-    'esi' => array(
+    'esi' => [
         'enabled' => true,
-    ),
-    'ssi' => array(
+    ],
+    'ssi' => [
         'enabled' => true,
-    ),
-    'profiler' => array(
+    ],
+    'profiler' => [
         'only_exceptions' => true,
         'enabled' => false,
-    ),
-    'router' => array(
+    ],
+    'router' => [
         'resource' => '%kernel.project_dir%/config/routing.xml',
         'type' => 'xml',
-    ),
-    'session' => array(
+    ],
+    'session' => [
         'storage_id' => 'session.storage.native',
         'handler_id' => 'session.handler.native_file',
         'name' => '_SYMFONY',
@@ -38,48 +38,48 @@ $container->loadFromExtension('framework', array(
         'gc_divisor' => 108,
         'gc_probability' => 1,
         'save_path' => '/path/to/sessions',
-    ),
-    'templating' => array(
+    ],
+    'templating' => [
         'cache' => '/path/to/cache',
-        'engines' => array('php', 'twig'),
-        'loader' => array('loader.foo', 'loader.bar'),
-        'form' => array(
-            'resources' => array('theme1', 'theme2'),
-        ),
+        'engines' => ['php', 'twig'],
+        'loader' => ['loader.foo', 'loader.bar'],
+        'form' => [
+            'resources' => ['theme1', 'theme2'],
+        ],
         'hinclude_default_template' => 'global_hinclude_template',
-    ),
-    'assets' => array(
+    ],
+    'assets' => [
         'version' => 'v1',
-    ),
-    'translator' => array(
+    ],
+    'translator' => [
         'enabled' => true,
         'fallback' => 'fr',
-        'paths' => array('%kernel.project_dir%/Fixtures/translations'),
-    ),
-    'validation' => array(
+        'paths' => ['%kernel.project_dir%/Fixtures/translations'],
+    ],
+    'validation' => [
         'enabled' => true,
-    ),
-    'annotations' => array(
+    ],
+    'annotations' => [
         'cache' => 'file',
         'debug' => true,
         'file_cache_dir' => '%kernel.cache_dir%/annotations',
-    ),
-    'serializer' => array(
+    ],
+    'serializer' => [
         'enabled' => true,
         'enable_annotations' => true,
         'name_converter' => 'serializer.name_converter.camel_case_to_snake_case',
         'circular_reference_handler' => 'my.circular.reference.handler',
         'max_depth_handler' => 'my.max.depth.handler',
-    ),
+    ],
     'property_info' => true,
     'ide' => 'file%%link%%format',
-    'request' => array(
-        'formats' => array(
-            'csv' => array(
+    'request' => [
+        'formats' => [
+            'csv' => [
                 'text/csv',
                 'text/plain',
-            ),
+            ],
             'pdf' => 'application/pdf',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger.php
index d8ffe33ade..d0a234eccc 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger.php
@@ -3,12 +3,12 @@
 use Symfony\Bundle\FrameworkBundle\Tests\Fixtures\Messenger\BarMessage;
 use Symfony\Bundle\FrameworkBundle\Tests\Fixtures\Messenger\FooMessage;
 
-$container->loadFromExtension('framework', array(
-    'messenger' => array(
+$container->loadFromExtension('framework', [
+    'messenger' => [
         'serializer' => false,
-        'routing' => array(
-            FooMessage::class => array('sender.bar', 'sender.biz'),
+        'routing' => [
+            FooMessage::class => ['sender.bar', 'sender.biz'],
             BarMessage::class => 'sender.foo',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_amqp_transport_no_serializer.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_amqp_transport_no_serializer.php
index 6c9ce5fc0a..10d31660f9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_amqp_transport_no_serializer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_amqp_transport_no_serializer.php
@@ -1,10 +1,10 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'messenger' => array(
+$container->loadFromExtension('framework', [
+    'messenger' => [
         'serializer' => false,
-        'transports' => array(
+        'transports' => [
             'default' => 'amqp://localhost/%2f/messages',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_middleware_factory_erroneous_format.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_middleware_factory_erroneous_format.php
index d6cc86bd37..cb4ee5e512 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_middleware_factory_erroneous_format.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_middleware_factory_erroneous_format.php
@@ -1,16 +1,16 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'messenger' => array(
-        'buses' => array(
-            'command_bus' => array(
-                'middleware' => array(
-                    array(
-                        'foo' => array('qux'),
-                        'bar' => array('baz'),
-                    ),
-                ),
-            ),
-        ),
-    ),
-));
+$container->loadFromExtension('framework', [
+    'messenger' => [
+        'buses' => [
+            'command_bus' => [
+                'middleware' => [
+                    [
+                        'foo' => ['qux'],
+                        'bar' => ['baz'],
+                    ],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_multiple_buses.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_multiple_buses.php
index f500ff9573..627e21f308 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_multiple_buses.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_multiple_buses.php
@@ -1,22 +1,22 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'messenger' => array(
+$container->loadFromExtension('framework', [
+    'messenger' => [
         'default_bus' => 'messenger.bus.commands',
-        'buses' => array(
+        'buses' => [
             'messenger.bus.commands' => null,
-            'messenger.bus.events' => array(
-                'middleware' => array(
-                    array('with_factory' => array('foo', true, array('bar' => 'baz'))),
-                ),
-            ),
-            'messenger.bus.queries' => array(
+            'messenger.bus.events' => [
+                'middleware' => [
+                    ['with_factory' => ['foo', true, ['bar' => 'baz']]],
+                ],
+            ],
+            'messenger.bus.queries' => [
                 'default_middleware' => false,
-                'middleware' => array(
+                'middleware' => [
                     'send_message',
                     'handle_message',
-                ),
-            ),
-        ),
-    ),
-));
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_routing.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_routing.php
index 60b68f1fdb..08aae8f27d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_routing.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_routing.php
@@ -1,19 +1,19 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'serializer' => true,
-    'messenger' => array(
+    'messenger' => [
         'serializer' => 'messenger.transport.symfony_serializer',
-        'routing' => array(
-            'Symfony\Component\Messenger\Tests\Fixtures\DummyMessage' => array('amqp', 'audit'),
-            'Symfony\Component\Messenger\Tests\Fixtures\SecondMessage' => array(
-                'senders' => array('amqp', 'audit'),
+        'routing' => [
+            'Symfony\Component\Messenger\Tests\Fixtures\DummyMessage' => ['amqp', 'audit'],
+            'Symfony\Component\Messenger\Tests\Fixtures\SecondMessage' => [
+                'senders' => ['amqp', 'audit'],
                 'send_and_handle' => true,
-            ),
+            ],
             '*' => 'amqp',
-        ),
-        'transports' => array(
+        ],
+        'transports' => [
             'amqp' => 'amqp://localhost/%2f/messages',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport.php
index 728a1a910c..cab5efe30a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'serializer' => true,
-    'messenger' => array(
-        'serializer' => array(
+    'messenger' => [
+        'serializer' => [
             'id' => 'messenger.transport.symfony_serializer',
             'format' => 'csv',
-            'context' => array('enable_max_depth' => true),
-        ),
-        'transports' => array(
+            'context' => ['enable_max_depth' => true],
+        ],
+        'transports' => [
             'default' => 'amqp://localhost/%2f/messages',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport_no_serializer.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport_no_serializer.php
index f861e25690..7580c3c1e5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport_no_serializer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transport_no_serializer.php
@@ -1,13 +1,13 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'serializer' => array(
+$container->loadFromExtension('framework', [
+    'serializer' => [
         'enabled' => false,
-    ),
-    'messenger' => array(
+    ],
+    'messenger' => [
         'serializer' => 'messenger.transport.symfony_serializer',
-        'transports' => array(
+        'transports' => [
             'default' => 'amqp://localhost/%2f/messages',
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transports.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transports.php
index 4edc0d880a..fd4b6feee7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transports.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/messenger_transports.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'serializer' => true,
-    'messenger' => array(
+    'messenger' => [
         'serializer' => 'messenger.transport.symfony_serializer',
-        'transports' => array(
+        'transports' => [
             'default' => 'amqp://localhost/%2f/messages',
-            'customised' => array(
+            'customised' => [
                 'dsn' => 'amqp://localhost/%2f/messages?exchange_name=exchange_name',
-                'options' => array('queue' => array('name' => 'Queue')),
-            ),
-        ),
-    ),
-));
+                'options' => ['queue' => ['name' => 'Queue']],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_disabled.php
index 1338ec5510..cff0582bf3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_disabled.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'php_errors' => array(
+$container->loadFromExtension('framework', [
+    'php_errors' => [
         'log' => false,
         'throw' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_enabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_enabled.php
index a33875ec6a..9afa5d1c02 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_enabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_enabled.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'php_errors' => array(
+$container->loadFromExtension('framework', [
+    'php_errors' => [
         'log' => true,
         'throw' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_log_level.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_log_level.php
index dcf75e4103..87fdd64d0b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_log_level.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/php_errors_log_level.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'php_errors' => array(
+$container->loadFromExtension('framework', [
+    'php_errors' => [
         'log' => 8,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/profiler.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/profiler.php
index 6615aa74ce..552c95e137 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/profiler.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/profiler.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'profiler' => array(
+$container->loadFromExtension('framework', [
+    'profiler' => [
         'enabled' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_accessor.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_accessor.php
index 4340e61fc0..b5b060c1ba 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_accessor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_accessor.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'property_access' => array(
+$container->loadFromExtension('framework', [
+    'property_access' => [
         'magic_call' => true,
         'throw_exception_on_invalid_index' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_info.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_info.php
index 847e15fa19..bff8d41158 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_info.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/property_info.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'property_info' => array(
+$container->loadFromExtension('framework', [
+    'property_info' => [
         'enabled' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/request.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/request.php
index 1e7cb2921c..d69d7512ad 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/request.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/request.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'request' => array(
-        'formats' => array(),
-    ),
-));
+$container->loadFromExtension('framework', [
+    'request' => [
+        'formats' => [],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_disabled.php
index dedd090beb..937a07c225 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_disabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'serializer' => array(
+$container->loadFromExtension('framework', [
+    'serializer' => [
         'enabled' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_enabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_enabled.php
index eadad57ec7..de3381c21e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_enabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_enabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'serializer' => array(
+$container->loadFromExtension('framework', [
+    'serializer' => [
         'enabled' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_legacy_cache.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_legacy_cache.php
index 65ddd32154..9636b1d661 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_legacy_cache.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_legacy_cache.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'serializer' => array(
+$container->loadFromExtension('framework', [
+    'serializer' => [
         'enabled' => true,
         'cache' => 'foo',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php
index f2b928ff2d..2f6f48e958 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/serializer_mapping.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'annotations' => array('enabled' => true),
-    'serializer' => array(
+$container->loadFromExtension('framework', [
+    'annotations' => ['enabled' => true],
+    'serializer' => [
         'enable_annotations' => true,
-        'mapping' => array(
-            'paths' => array(
+        'mapping' => [
+            'paths' => [
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/serializer_mapping/files',
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/serializer_mapping/serialization.yml',
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/serializer_mapping/serialization.yaml',
-            ),
-        ),
-    ),
-));
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session.php
index 104183764a..375008c7db 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'session' => array(
+$container->loadFromExtension('framework', [
+    'session' => [
         'handler_id' => null,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session_cookie_secure_auto.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session_cookie_secure_auto.php
index b23f2a5cd3..7259b07f92 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session_cookie_secure_auto.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/session_cookie_secure_auto.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'session' => array(
+$container->loadFromExtension('framework', [
+    'session' => [
         'handler_id' => null,
         'cookie_secure' => 'auto',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/ssi_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/ssi_disabled.php
index 4d61d82166..32e1bf0c55 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/ssi_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/ssi_disabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'ssi' => array(
+$container->loadFromExtension('framework', [
+    'ssi' => [
         'enabled' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_disabled.php
index f76d8ad351..2d5e6d779f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_disabled.php
@@ -1,5 +1,5 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'templating' => false,
-));
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_no_assets.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_no_assets.php
index bf12a8bc47..f4d5a28aaf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_no_assets.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_no_assets.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'templating' => array(
-        'engines' => array('php', 'twig'),
-    ),
-));
+$container->loadFromExtension('framework', [
+    'templating' => [
+        'engines' => ['php', 'twig'],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_php_assets_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_php_assets_disabled.php
index 535a9a2e99..851a7e140c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_php_assets_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/templating_php_assets_disabled.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'assets' => false,
-    'templating' => array(
-        'engines' => array('php'),
-    ),
-));
+    'templating' => [
+        'engines' => ['php'],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/translator_fallbacks.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/translator_fallbacks.php
index 0abe3a46ab..592a61de65 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/translator_fallbacks.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/translator_fallbacks.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'translator' => array(
-        'fallbacks' => array('en', 'fr'),
-    ),
-));
+$container->loadFromExtension('framework', [
+    'translator' => [
+        'fallbacks' => ['en', 'fr'],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_annotations.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_annotations.php
index 35a0b3d39e..dff03e398e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_annotations.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_annotations.php
@@ -1,9 +1,9 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'secret' => 's3cr3t',
-    'validation' => array(
+    'validation' => [
         'enabled' => true,
         'enable_annotations' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_email_validation_mode.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_email_validation_mode.php
index 373aa678de..5100e01e12 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_email_validation_mode.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_email_validation_mode.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
         'email_validation_mode' => 'html5',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_mapping.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_mapping.php
index 5d44c6c215..f8b19e3480 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_mapping.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_mapping.php
@@ -1,13 +1,13 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
-        'mapping' => array(
-            'paths' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
+        'mapping' => [
+            'paths' => [
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/validation_mapping/files',
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/validation_mapping/validation.yml',
                 '%kernel.project_dir%/Fixtures/TestBundle/Resources/config/validation_mapping/validation.yaml',
-            ),
-        ),
-    ),
-));
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_multiple_static_methods.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_multiple_static_methods.php
index 476da7948e..ad2bd817a2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_multiple_static_methods.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_multiple_static_methods.php
@@ -1,9 +1,9 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'secret' => 's3cr3t',
-    'validation' => array(
+    'validation' => [
         'enabled' => true,
-        'static_method' => array('loadFoo', 'loadBar'),
-    ),
-));
+        'static_method' => ['loadFoo', 'loadBar'],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_no_static_method.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_no_static_method.php
index b428e06f5c..a9d98e17c6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_no_static_method.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_no_static_method.php
@@ -1,9 +1,9 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'secret' => 's3cr3t',
-    'validation' => array(
+    'validation' => [
         'enabled' => true,
         'static_method' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_and_validation_mode.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_and_validation_mode.php
index 9e57bc5ce2..414b323efe 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_and_validation_mode.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_and_validation_mode.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
         'strict_email' => true,
         'email_validation_mode' => 'strict',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_disabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_disabled.php
index d26b56eec3..b5a8b7bba6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_disabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_disabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
         'strict_email' => false,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_enabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_enabled.php
index 64a47a2322..caa47d7470 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_enabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_strict_email_enabled.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
         'strict_email' => true,
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_translation_domain.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_translation_domain.php
index 40a81d4936..42ea071303 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_translation_domain.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/validation_translation_domain.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'validation' => array(
+$container->loadFromExtension('framework', [
+    'validation' => [
         'translation_domain' => 'messages',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/web_link.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/web_link.php
index 990064cca9..44d52e402d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/web_link.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/web_link.php
@@ -1,5 +1,5 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'web_link' => array('enabled' => true),
-));
+$container->loadFromExtension('framework', [
+    'web_link' => ['enabled' => true],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_arguments_and_service.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_arguments_and_service.php
index d97f9700a0..003b99f210 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_arguments_and_service.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_arguments_and_service.php
@@ -2,30 +2,30 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'my_workflow' => array(
-            'marking_store' => array(
-                'arguments' => array('a', 'b'),
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'my_workflow' => [
+            'marking_store' => [
+                'arguments' => ['a', 'b'],
                 'service' => 'workflow_service',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
-            'places' => array(
+            ],
+            'places' => [
                 'first',
                 'last',
-            ),
-            'transitions' => array(
-                'go' => array(
-                    'from' => array(
+            ],
+            'transitions' => [
+                'go' => [
+                    'from' => [
                         'first',
-                    ),
-                    'to' => array(
+                    ],
+                    'to' => [
                         'last',
-                    ),
-                ),
-            ),
-        ),
-    ),
-));
+                    ],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_guard_expression.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_guard_expression.php
index 89c86339af..19de6363e6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_guard_expression.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_guard_expression.php
@@ -2,50 +2,50 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'article' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'article' => [
             'type' => 'workflow',
-            'marking_store' => array(
+            'marking_store' => [
                 'type' => 'multiple_state',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
+            ],
             'initial_place' => 'draft',
-            'places' => array(
+            'places' => [
                 'draft',
                 'wait_for_journalist',
                 'approved_by_journalist',
                 'wait_for_spellchecker',
                 'approved_by_spellchecker',
                 'published',
-            ),
-            'transitions' => array(
-                'request_review' => array(
+            ],
+            'transitions' => [
+                'request_review' => [
                     'from' => 'draft',
-                    'to' => array('wait_for_journalist', 'wait_for_spellchecker'),
-                ),
-                'journalist_approval' => array(
+                    'to' => ['wait_for_journalist', 'wait_for_spellchecker'],
+                ],
+                'journalist_approval' => [
                     'from' => 'wait_for_journalist',
                     'to' => 'approved_by_journalist',
-                ),
-                'spellchecker_approval' => array(
+                ],
+                'spellchecker_approval' => [
                     'from' => 'wait_for_spellchecker',
                     'to' => 'approved_by_spellchecker',
-                ),
-                'publish' => array(
-                    'from' => array('approved_by_journalist', 'approved_by_spellchecker'),
+                ],
+                'publish' => [
+                    'from' => ['approved_by_journalist', 'approved_by_spellchecker'],
                     'to' => 'published',
                     'guard' => '!!true',
-                ),
-                'publish_editor_in_chief' => array(
+                ],
+                'publish_editor_in_chief' => [
                     'name' => 'publish',
                     'from' => 'draft',
                     'to' => 'published',
                     'guard' => '!!false',
-                ),
-            ),
-        ),
-    ),
-));
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_multiple_transitions_with_same_name.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_multiple_transitions_with_same_name.php
index 2619a2dd43..c1a525db03 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_multiple_transitions_with_same_name.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_multiple_transitions_with_same_name.php
@@ -2,48 +2,48 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'article' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'article' => [
             'type' => 'workflow',
-            'marking_store' => array(
+            'marking_store' => [
                 'type' => 'multiple_state',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
+            ],
             'initial_place' => 'draft',
-            'places' => array(
+            'places' => [
                 'draft',
                 'wait_for_journalist',
                 'approved_by_journalist',
                 'wait_for_spellchecker',
                 'approved_by_spellchecker',
                 'published',
-            ),
-            'transitions' => array(
-                'request_review' => array(
+            ],
+            'transitions' => [
+                'request_review' => [
                     'from' => 'draft',
-                    'to' => array('wait_for_journalist', 'wait_for_spellchecker'),
-                ),
-                'journalist_approval' => array(
+                    'to' => ['wait_for_journalist', 'wait_for_spellchecker'],
+                ],
+                'journalist_approval' => [
                     'from' => 'wait_for_journalist',
                     'to' => 'approved_by_journalist',
-                ),
-                'spellchecker_approval' => array(
+                ],
+                'spellchecker_approval' => [
                     'from' => 'wait_for_spellchecker',
                     'to' => 'approved_by_spellchecker',
-                ),
-                'publish' => array(
-                    'from' => array('approved_by_journalist', 'approved_by_spellchecker'),
+                ],
+                'publish' => [
+                    'from' => ['approved_by_journalist', 'approved_by_spellchecker'],
                     'to' => 'published',
-                ),
-                'publish_editor_in_chief' => array(
+                ],
+                'publish_editor_in_chief' => [
                     'name' => 'publish',
                     'from' => 'draft',
                     'to' => 'published',
-                ),
-            ),
-        ),
-    ),
-));
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_support_and_support_strategy.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_support_and_support_strategy.php
index 062fdb9f0d..4b38093a3d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_support_and_support_strategy.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_support_and_support_strategy.php
@@ -2,30 +2,30 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'my_workflow' => array(
-            'marking_store' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'my_workflow' => [
+            'marking_store' => [
                 'type' => 'multiple_state',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
+            ],
             'support_strategy' => 'foobar',
-            'places' => array(
+            'places' => [
                 'first',
                 'last',
-            ),
-            'transitions' => array(
-                'go' => array(
-                    'from' => array(
+            ],
+            'transitions' => [
+                'go' => [
+                    'from' => [
                         'first',
-                    ),
-                    'to' => array(
+                    ],
+                    'to' => [
                         'last',
-                    ),
-                ),
-            ),
-        ),
-    ),
-));
+                    ],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_type_and_service.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_type_and_service.php
index 7d9e596408..eca1e29c45 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_type_and_service.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_with_type_and_service.php
@@ -2,30 +2,30 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'my_workflow' => array(
-            'marking_store' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'my_workflow' => [
+            'marking_store' => [
                 'type' => 'multiple_state',
                 'service' => 'workflow_service',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
-            'places' => array(
+            ],
+            'places' => [
                 'first',
                 'last',
-            ),
-            'transitions' => array(
-                'go' => array(
-                    'from' => array(
+            ],
+            'transitions' => [
+                'go' => [
+                    'from' => [
                         'first',
-                    ),
-                    'to' => array(
+                    ],
+                    'to' => [
                         'last',
-                    ),
-                ),
-            ),
-        ),
-    ),
-));
+                    ],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_without_support_and_support_strategy.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_without_support_and_support_strategy.php
index 06948785e9..dd2a92dc26 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_without_support_and_support_strategy.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflow_without_support_and_support_strategy.php
@@ -2,26 +2,26 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'my_workflow' => array(
-            'marking_store' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'my_workflow' => [
+            'marking_store' => [
                 'type' => 'multiple_state',
-            ),
-            'places' => array(
+            ],
+            'places' => [
                 'first',
                 'last',
-            ),
-            'transitions' => array(
-                'go' => array(
-                    'from' => array(
+            ],
+            'transitions' => [
+                'go' => [
+                    'from' => [
                         'first',
-                    ),
-                    'to' => array(
+                    ],
+                    'to' => [
                         'last',
-                    ),
-                ),
-            ),
-        ),
-    ),
-));
+                    ],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows.php
index e8a54059d4..9d066a21ba 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows.php
@@ -2,120 +2,120 @@
 
 use Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest;
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
-        'article' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
+        'article' => [
             'type' => 'workflow',
-            'marking_store' => array(
+            'marking_store' => [
                 'type' => 'multiple_state',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
+            ],
             'initial_place' => 'draft',
-            'places' => array(
+            'places' => [
                 'draft',
                 'wait_for_journalist',
                 'approved_by_journalist',
                 'wait_for_spellchecker',
                 'approved_by_spellchecker',
                 'published',
-            ),
-            'transitions' => array(
-                'request_review' => array(
+            ],
+            'transitions' => [
+                'request_review' => [
                     'from' => 'draft',
-                    'to' => array('wait_for_journalist', 'wait_for_spellchecker'),
-                ),
-                'journalist_approval' => array(
+                    'to' => ['wait_for_journalist', 'wait_for_spellchecker'],
+                ],
+                'journalist_approval' => [
                     'from' => 'wait_for_journalist',
                     'to' => 'approved_by_journalist',
-                ),
-                'spellchecker_approval' => array(
+                ],
+                'spellchecker_approval' => [
                     'from' => 'wait_for_spellchecker',
                     'to' => 'approved_by_spellchecker',
-                ),
-                'publish' => array(
-                    'from' => array('approved_by_journalist', 'approved_by_spellchecker'),
+                ],
+                'publish' => [
+                    'from' => ['approved_by_journalist', 'approved_by_spellchecker'],
                     'to' => 'published',
-                ),
-            ),
-        ),
-        'pull_request' => array(
-            'marking_store' => array(
+                ],
+            ],
+        ],
+        'pull_request' => [
+            'marking_store' => [
                 'type' => 'single_state',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
+            ],
             'initial_place' => 'start',
-            'metadata' => array(
+            'metadata' => [
                 'title' => 'workflow title',
-            ),
-            'places' => array(
-                'start_name_not_used' => array(
+            ],
+            'places' => [
+                'start_name_not_used' => [
                     'name' => 'start',
-                    'metadata' => array(
+                    'metadata' => [
                         'title' => 'place start title',
-                    ),
-                ),
+                    ],
+                ],
                 'coding' => null,
                 'travis' => null,
                 'review' => null,
                 'merged' => null,
                 'closed' => null,
-            ),
-            'transitions' => array(
-                'submit' => array(
+            ],
+            'transitions' => [
+                'submit' => [
                     'from' => 'start',
                     'to' => 'travis',
-                    'metadata' => array(
+                    'metadata' => [
                         'title' => 'transition submit title',
-                    ),
-                ),
-                'update' => array(
-                    'from' => array('coding', 'travis', 'review'),
+                    ],
+                ],
+                'update' => [
+                    'from' => ['coding', 'travis', 'review'],
                     'to' => 'travis',
-                ),
-                'wait_for_review' => array(
+                ],
+                'wait_for_review' => [
                     'from' => 'travis',
                     'to' => 'review',
-                ),
-                'request_change' => array(
+                ],
+                'request_change' => [
                     'from' => 'review',
                     'to' => 'coding',
-                ),
-                'accept' => array(
+                ],
+                'accept' => [
                     'from' => 'review',
                     'to' => 'merged',
-                ),
-                'reject' => array(
+                ],
+                'reject' => [
                     'from' => 'review',
                     'to' => 'closed',
-                ),
-                'reopen' => array(
+                ],
+                'reopen' => [
                     'from' => 'closed',
                     'to' => 'review',
-                ),
-            ),
-        ),
-        'service_marking_store_workflow' => array(
+                ],
+            ],
+        ],
+        'service_marking_store_workflow' => [
             'type' => 'workflow',
-            'marking_store' => array(
+            'marking_store' => [
                 'service' => 'workflow_service',
-            ),
-            'supports' => array(
+            ],
+            'supports' => [
                 FrameworkExtensionTest::class,
-            ),
-            'places' => array(
-                array('name' => 'first'),
-                array('name' => 'last'),
-            ),
-            'transitions' => array(
-                'go' => array(
+            ],
+            'places' => [
+                ['name' => 'first'],
+                ['name' => 'last'],
+            ],
+            'transitions' => [
+                'go' => [
                     'from' => 'first',
                     'to' => 'last',
-                ),
-            ),
-        ),
-    ),
-));
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_enabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_enabled.php
index 9a2fe9136a..eb17731940 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_enabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_enabled.php
@@ -1,5 +1,5 @@
 <?php
 
-$container->loadFromExtension('framework', array(
+$container->loadFromExtension('framework', [
     'workflows' => null,
-));
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled.php
index 16009b588f..165d0daa11 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled.php
@@ -1,19 +1,19 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
         'enabled' => true,
-        'foo' => array(
+        'foo' => [
             'type' => 'workflow',
-            'supports' => array('Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest'),
+            'supports' => ['Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest'],
             'initial_place' => 'bar',
-            'places' => array('bar', 'baz'),
-            'transitions' => array(
-                'bar_baz' => array(
-                    'from' => array('foo'),
-                    'to' => array('bar'),
-                ),
-            ),
-        ),
-    ),
-));
+            'places' => ['bar', 'baz'],
+            'transitions' => [
+                'bar_baz' => [
+                    'from' => ['foo'],
+                    'to' => ['bar'],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled_named_workflows.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled_named_workflows.php
index bd36d87fa2..17055ec16f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled_named_workflows.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/Fixtures/php/workflows_explicitly_enabled_named_workflows.php
@@ -1,19 +1,19 @@
 <?php
 
-$container->loadFromExtension('framework', array(
-    'workflows' => array(
+$container->loadFromExtension('framework', [
+    'workflows' => [
         'enabled' => true,
-        'workflows' => array(
+        'workflows' => [
             'type' => 'workflow',
-            'supports' => array('Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest'),
+            'supports' => ['Symfony\Bundle\FrameworkBundle\Tests\DependencyInjection\FrameworkExtensionTest'],
             'initial_place' => 'bar',
-            'places' => array('bar', 'baz'),
-            'transitions' => array(
-                'bar_baz' => array(
-                    'from' => array('foo'),
-                    'to' => array('bar'),
-                ),
-            ),
-        ),
-    ),
-));
+            'places' => ['bar', 'baz'],
+            'transitions' => [
+                'bar_baz' => [
+                    'from' => ['foo'],
+                    'to' => ['bar'],
+                ],
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
index 4a959568f4..862786c9b8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/FrameworkExtensionTest.php
@@ -54,7 +54,7 @@ use Symfony\Component\Workflow;
 
 abstract class FrameworkExtensionTest extends TestCase
 {
-    private static $containerCache = array();
+    private static $containerCache = [];
 
     abstract protected function loadFromFile(ContainerBuilder $container, $file);
 
@@ -96,13 +96,13 @@ abstract class FrameworkExtensionTest extends TestCase
         }
 
         $cache = $container->getDefinition('cache.property_access');
-        $this->assertSame(array(PropertyAccessor::class, 'createCache'), $cache->getFactory(), 'PropertyAccessor::createCache() should be used in non-debug mode');
+        $this->assertSame([PropertyAccessor::class, 'createCache'], $cache->getFactory(), 'PropertyAccessor::createCache() should be used in non-debug mode');
         $this->assertSame(AdapterInterface::class, $cache->getClass());
     }
 
     public function testPropertyAccessCacheWithDebug()
     {
-        $container = $this->createContainerFromFile('property_accessor', array('kernel.debug' => true));
+        $container = $this->createContainerFromFile('property_accessor', ['kernel.debug' => true]);
 
         if (!method_exists(PropertyAccessor::class, 'createCache')) {
             return $this->assertFalse($container->hasDefinition('cache.property_access'));
@@ -204,18 +204,18 @@ abstract class FrameworkExtensionTest extends TestCase
         $workflowDefinition = $container->getDefinition('workflow.article.definition');
 
         $this->assertSame(
-            array(
+            [
                 'draft',
                 'wait_for_journalist',
                 'approved_by_journalist',
                 'wait_for_spellchecker',
                 'approved_by_spellchecker',
                 'published',
-            ),
+            ],
             $workflowDefinition->getArgument(0),
             'Places are passed to the workflow definition'
         );
-        $this->assertSame(array('workflow.definition' => array(array('name' => 'article', 'type' => 'workflow', 'marking_store' => 'multiple_state'))), $workflowDefinition->getTags());
+        $this->assertSame(['workflow.definition' => [['name' => 'article', 'type' => 'workflow', 'marking_store' => 'multiple_state']]], $workflowDefinition->getTags());
         $this->assertCount(4, $workflowDefinition->getArgument(1));
         $this->assertSame('draft', $workflowDefinition->getArgument(2));
 
@@ -226,18 +226,18 @@ abstract class FrameworkExtensionTest extends TestCase
         $stateMachineDefinition = $container->getDefinition('state_machine.pull_request.definition');
 
         $this->assertSame(
-            array(
+            [
                 'start',
                 'coding',
                 'travis',
                 'review',
                 'merged',
                 'closed',
-            ),
+            ],
             $stateMachineDefinition->getArgument(0),
             'Places are passed to the state machine definition'
         );
-        $this->assertSame(array('workflow.definition' => array(array('name' => 'pull_request', 'type' => 'state_machine', 'marking_store' => 'single_state'))), $stateMachineDefinition->getTags());
+        $this->assertSame(['workflow.definition' => [['name' => 'pull_request', 'type' => 'state_machine', 'marking_store' => 'single_state']]], $stateMachineDefinition->getTags());
         $this->assertCount(9, $stateMachineDefinition->getArgument(1));
         $this->assertSame('start', $stateMachineDefinition->getArgument(2));
 
@@ -246,11 +246,11 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertSame(Workflow\Metadata\InMemoryMetadataStore::class, $metadataStoreDefinition->getClass());
 
         $workflowMetadata = $metadataStoreDefinition->getArgument(0);
-        $this->assertSame(array('title' => 'workflow title'), $workflowMetadata);
+        $this->assertSame(['title' => 'workflow title'], $workflowMetadata);
 
         $placesMetadata = $metadataStoreDefinition->getArgument(1);
         $this->assertArrayHasKey('start', $placesMetadata);
-        $this->assertSame(array('title' => 'place start title'), $placesMetadata['start']);
+        $this->assertSame(['title' => 'place start title'], $placesMetadata['start']);
 
         $transitionsMetadata = $metadataStoreDefinition->getArgument(2);
         $this->assertSame(\SplObjectStorage::class, $transitionsMetadata->getClass());
@@ -322,60 +322,60 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertCount(5, $transitions);
 
         $this->assertSame('workflow.article.transition.0', (string) $transitions[0]);
-        $this->assertSame(array(
+        $this->assertSame([
             'request_review',
-            array(
+            [
                 'draft',
-            ),
-            array(
+            ],
+            [
                 'wait_for_journalist', 'wait_for_spellchecker',
-            ),
-        ), $container->getDefinition($transitions[0])->getArguments());
+            ],
+        ], $container->getDefinition($transitions[0])->getArguments());
 
         $this->assertSame('workflow.article.transition.1', (string) $transitions[1]);
-        $this->assertSame(array(
+        $this->assertSame([
             'journalist_approval',
-            array(
+            [
                 'wait_for_journalist',
-            ),
-            array(
+            ],
+            [
                 'approved_by_journalist',
-            ),
-        ), $container->getDefinition($transitions[1])->getArguments());
+            ],
+        ], $container->getDefinition($transitions[1])->getArguments());
 
         $this->assertSame('workflow.article.transition.2', (string) $transitions[2]);
-        $this->assertSame(array(
+        $this->assertSame([
             'spellchecker_approval',
-            array(
+            [
                 'wait_for_spellchecker',
-            ),
-            array(
+            ],
+            [
                 'approved_by_spellchecker',
-            ),
-        ), $container->getDefinition($transitions[2])->getArguments());
+            ],
+        ], $container->getDefinition($transitions[2])->getArguments());
 
         $this->assertSame('workflow.article.transition.3', (string) $transitions[3]);
-        $this->assertSame(array(
+        $this->assertSame([
             'publish',
-            array(
+            [
                 'approved_by_journalist',
                 'approved_by_spellchecker',
-            ),
-            array(
+            ],
+            [
                 'published',
-            ),
-        ), $container->getDefinition($transitions[3])->getArguments());
+            ],
+        ], $container->getDefinition($transitions[3])->getArguments());
 
         $this->assertSame('workflow.article.transition.4', (string) $transitions[4]);
-        $this->assertSame(array(
+        $this->assertSame([
             'publish',
-            array(
+            [
                 'draft',
-            ),
-            array(
+            ],
+            [
                 'published',
-            ),
-        ), $container->getDefinition($transitions[4])->getArguments());
+            ],
+        ], $container->getDefinition($transitions[4])->getArguments());
     }
 
     public function testGuardExpressions()
@@ -386,12 +386,12 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertTrue($container->hasParameter('workflow.has_guard_listeners'), 'Workflow guard listeners parameter exists');
         $this->assertTrue(true === $container->getParameter('workflow.has_guard_listeners'), 'Workflow guard listeners parameter is enabled');
         $guardDefinition = $container->getDefinition('workflow.article.listener.guard');
-        $this->assertSame(array(
-            array(
+        $this->assertSame([
+            [
                 'event' => 'workflow.article.guard.publish',
                 'method' => 'onTransition',
-            ),
-        ), $guardDefinition->getTag('kernel.event_listener'));
+            ],
+        ], $guardDefinition->getTag('kernel.event_listener'));
         $guardsConfiguration = $guardDefinition->getArgument(0);
         $this->assertTrue(1 === \count($guardsConfiguration), 'Workflow guard configuration contains one element per transition name');
         $transitionGuardExpressions = $guardsConfiguration['workflow.article.guard.publish'];
@@ -470,7 +470,7 @@ abstract class FrameworkExtensionTest extends TestCase
     {
         $container = $this->createContainer();
         $loader = new FrameworkExtension();
-        $loader->load(array(array('router' => true)), $container);
+        $loader->load([['router' => true]], $container);
     }
 
     public function testSession()
@@ -505,7 +505,7 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertNull($container->getDefinition('session.storage.native')->getArgument(1));
         $this->assertNull($container->getDefinition('session.storage.php_bridge')->getArgument(0));
 
-        $expected = array('session', 'initialized_session');
+        $expected = ['session', 'initialized_session'];
         $this->assertEquals($expected, array_keys($container->getDefinition('session_listener')->getArgument(0)->getValues()));
     }
 
@@ -515,7 +515,7 @@ abstract class FrameworkExtensionTest extends TestCase
 
         $this->assertTrue($container->hasDefinition('request.add_request_formats_listener'), '->registerRequestConfiguration() loads request.xml');
         $listenerDef = $container->getDefinition('request.add_request_formats_listener');
-        $this->assertEquals(array('csv' => array('text/csv', 'text/plain'), 'pdf' => array('application/pdf')), $listenerDef->getArgument(0));
+        $this->assertEquals(['csv' => ['text/csv', 'text/plain'], 'pdf' => ['application/pdf']], $listenerDef->getArgument(0));
     }
 
     public function testEmptyRequestFormats()
@@ -540,9 +540,9 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertEquals('%templating.loader.cache.path%', $container->getDefinition('templating.loader.cache')->getArgument(1));
         $this->assertEquals('/path/to/cache', $container->getParameter('templating.loader.cache.path'));
 
-        $this->assertEquals(array('php', 'twig'), $container->getParameter('templating.engines'), '->registerTemplatingConfiguration() sets a templating.engines parameter');
+        $this->assertEquals(['php', 'twig'], $container->getParameter('templating.engines'), '->registerTemplatingConfiguration() sets a templating.engines parameter');
 
-        $this->assertEquals(array('FrameworkBundle:Form', 'theme1', 'theme2'), $container->getParameter('templating.helper.form.resources'), '->registerTemplatingConfiguration() registers the theme and adds the base theme');
+        $this->assertEquals(['FrameworkBundle:Form', 'theme1', 'theme2'], $container->getParameter('templating.helper.form.resources'), '->registerTemplatingConfiguration() registers the theme and adds the base theme');
         $this->assertEquals('global_hinclude_template', $container->getParameter('fragment.renderer.hinclude.global_template'), '->registerTemplatingConfiguration() registers the global hinclude.js template');
     }
 
@@ -560,7 +560,7 @@ abstract class FrameworkExtensionTest extends TestCase
 
         // default package
         $defaultPackage = $container->getDefinition((string) $packages->getArgument(0));
-        $this->assertUrlPackage($container, $defaultPackage, array('http://cdn.example.com'), 'SomeVersionScheme', '%%s?version=%%s');
+        $this->assertUrlPackage($container, $defaultPackage, ['http://cdn.example.com'], 'SomeVersionScheme', '%%s?version=%%s');
 
         // packages
         $packages = $packages->getArgument(1);
@@ -570,13 +570,13 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertPathPackage($container, $package, '/foo', 'SomeVersionScheme', '%%s?version=%%s');
 
         $package = $container->getDefinition((string) $packages['images']);
-        $this->assertUrlPackage($container, $package, array('http://images1.example.com', 'http://images2.example.com'), '1.0.0', '%%s?version=%%s');
+        $this->assertUrlPackage($container, $package, ['http://images1.example.com', 'http://images2.example.com'], '1.0.0', '%%s?version=%%s');
 
         $package = $container->getDefinition((string) $packages['foo']);
         $this->assertPathPackage($container, $package, '', '1.0.0', '%%s-%%s');
 
         $package = $container->getDefinition((string) $packages['bar']);
-        $this->assertUrlPackage($container, $package, array('https://bar2.example.com'), 'SomeVersionScheme', '%%s?version=%%s');
+        $this->assertUrlPackage($container, $package, ['https://bar2.example.com'], 'SomeVersionScheme', '%%s?version=%%s');
 
         $package = $container->getDefinition((string) $packages['bar_version_strategy']);
         $this->assertEquals('assets.custom_version_strategy', (string) $package->getArgument(1));
@@ -625,16 +625,16 @@ abstract class FrameworkExtensionTest extends TestCase
         $container = $this->createContainerFromFile('messenger_transports');
         $this->assertTrue($container->hasDefinition('messenger.transport.default'));
         $this->assertTrue($container->getDefinition('messenger.transport.default')->hasTag('messenger.receiver'));
-        $this->assertEquals(array(array('alias' => 'default')), $container->getDefinition('messenger.transport.default')->getTag('messenger.receiver'));
+        $this->assertEquals([['alias' => 'default']], $container->getDefinition('messenger.transport.default')->getTag('messenger.receiver'));
 
         $this->assertTrue($container->hasDefinition('messenger.transport.customised'));
         $transportFactory = $container->getDefinition('messenger.transport.customised')->getFactory();
         $transportArguments = $container->getDefinition('messenger.transport.customised')->getArguments();
 
-        $this->assertEquals(array(new Reference('messenger.transport_factory'), 'createTransport'), $transportFactory);
+        $this->assertEquals([new Reference('messenger.transport_factory'), 'createTransport'], $transportFactory);
         $this->assertCount(2, $transportArguments);
         $this->assertSame('amqp://localhost/%2f/messages?exchange_name=exchange_name', $transportArguments[0]);
-        $this->assertSame(array('queue' => array('name' => 'Queue')), $transportArguments[1]);
+        $this->assertSame(['queue' => ['name' => 'Queue']], $transportArguments[1]);
 
         $this->assertTrue($container->hasDefinition('messenger.transport.amqp.factory'));
     }
@@ -644,18 +644,18 @@ abstract class FrameworkExtensionTest extends TestCase
         $container = $this->createContainerFromFile('messenger_routing');
         $senderLocatorDefinition = $container->getDefinition('messenger.senders_locator');
 
-        $messageToSendAndHandleMapping = array(
+        $messageToSendAndHandleMapping = [
             DummyMessage::class => false,
             SecondMessage::class => true,
             '*' => false,
-        );
+        ];
 
         $this->assertSame($messageToSendAndHandleMapping, $senderLocatorDefinition->getArgument(1));
         $sendersMapping = $senderLocatorDefinition->getArgument(0);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'amqp' => new Reference('messenger.transport.amqp'),
             'audit' => new Reference('audit'),
-        ), $sendersMapping[DummyMessage::class]->getValues());
+        ], $sendersMapping[DummyMessage::class]->getValues());
     }
 
     /**
@@ -684,7 +684,7 @@ abstract class FrameworkExtensionTest extends TestCase
 
         $serializerTransportDefinition = $container->getDefinition('messenger.transport.symfony_serializer');
         $this->assertSame('csv', $serializerTransportDefinition->getArgument(1));
-        $this->assertSame(array('enable_max_depth' => true), $serializerTransportDefinition->getArgument(2));
+        $this->assertSame(['enable_max_depth' => true], $serializerTransportDefinition->getArgument(2));
     }
 
     public function testMessengerWithMultipleBuses()
@@ -692,26 +692,26 @@ abstract class FrameworkExtensionTest extends TestCase
         $container = $this->createContainerFromFile('messenger_multiple_buses');
 
         $this->assertTrue($container->has('messenger.bus.commands'));
-        $this->assertSame(array(), $container->getDefinition('messenger.bus.commands')->getArgument(0));
-        $this->assertEquals(array(
-            array('id' => 'logging'),
-            array('id' => 'send_message'),
-            array('id' => 'handle_message'),
-        ), $container->getParameter('messenger.bus.commands.middleware'));
+        $this->assertSame([], $container->getDefinition('messenger.bus.commands')->getArgument(0));
+        $this->assertEquals([
+            ['id' => 'logging'],
+            ['id' => 'send_message'],
+            ['id' => 'handle_message'],
+        ], $container->getParameter('messenger.bus.commands.middleware'));
         $this->assertTrue($container->has('messenger.bus.events'));
-        $this->assertSame(array(), $container->getDefinition('messenger.bus.events')->getArgument(0));
-        $this->assertEquals(array(
-            array('id' => 'logging'),
-            array('id' => 'with_factory', 'arguments' => array('foo', true, array('bar' => 'baz'))),
-            array('id' => 'send_message'),
-            array('id' => 'handle_message'),
-        ), $container->getParameter('messenger.bus.events.middleware'));
+        $this->assertSame([], $container->getDefinition('messenger.bus.events')->getArgument(0));
+        $this->assertEquals([
+            ['id' => 'logging'],
+            ['id' => 'with_factory', 'arguments' => ['foo', true, ['bar' => 'baz']]],
+            ['id' => 'send_message'],
+            ['id' => 'handle_message'],
+        ], $container->getParameter('messenger.bus.events.middleware'));
         $this->assertTrue($container->has('messenger.bus.queries'));
-        $this->assertSame(array(), $container->getDefinition('messenger.bus.queries')->getArgument(0));
-        $this->assertEquals(array(
-            array('id' => 'send_message', 'arguments' => array()),
-            array('id' => 'handle_message', 'arguments' => array()),
-        ), $container->getParameter('messenger.bus.queries.middleware'));
+        $this->assertSame([], $container->getDefinition('messenger.bus.queries')->getArgument(0));
+        $this->assertEquals([
+            ['id' => 'send_message', 'arguments' => []],
+            ['id' => 'handle_message', 'arguments' => []],
+        ], $container->getParameter('messenger.bus.queries.middleware'));
 
         $this->assertTrue($container->hasAlias('message_bus'));
         $this->assertSame('messenger.bus.commands', (string) $container->getAlias('message_bus'));
@@ -764,7 +764,7 @@ abstract class FrameworkExtensionTest extends TestCase
         );
 
         $calls = $container->getDefinition('translator.default')->getMethodCalls();
-        $this->assertEquals(array('fr'), $calls[1][1][0]);
+        $this->assertEquals(['fr'], $calls[1][1][0]);
     }
 
     /**
@@ -773,7 +773,7 @@ abstract class FrameworkExtensionTest extends TestCase
      */
     public function testLegacyTranslationsDirectory()
     {
-        $container = $this->createContainerFromFile('full', array('kernel.root_dir' => __DIR__.'/Fixtures'));
+        $container = $this->createContainerFromFile('full', ['kernel.root_dir' => __DIR__.'/Fixtures']);
         $options = $container->getDefinition('translator.default')->getArgument(4);
         $files = array_map('realpath', $options['resource_files']['en']);
 
@@ -786,7 +786,7 @@ abstract class FrameworkExtensionTest extends TestCase
         $container = $this->createContainerFromFile('translator_fallbacks');
 
         $calls = $container->getDefinition('translator.default')->getMethodCalls();
-        $this->assertEquals(array('en', 'fr'), $calls[1][1][0]);
+        $this->assertEquals(['en', 'fr'], $calls[1][1][0]);
     }
 
     /**
@@ -796,7 +796,7 @@ abstract class FrameworkExtensionTest extends TestCase
     {
         $container = $this->createContainer();
         $loader = new FrameworkExtension();
-        $loader->load(array(array('templating' => null)), $container);
+        $loader->load([['templating' => null]], $container);
     }
 
     public function testValidation()
@@ -805,10 +805,10 @@ abstract class FrameworkExtensionTest extends TestCase
         $projectDir = $container->getParameter('kernel.project_dir');
 
         $ref = new \ReflectionClass('Symfony\Component\Form\Form');
-        $xmlMappings = array(
+        $xmlMappings = [
             \dirname($ref->getFileName()).'/Resources/config/validation.xml',
             strtr($projectDir.'/config/validator/foo.xml', '/', \DIRECTORY_SEPARATOR),
-        );
+        ];
 
         $calls = $container->getDefinition('validator.builder')->getMethodCalls();
 
@@ -816,33 +816,33 @@ abstract class FrameworkExtensionTest extends TestCase
 
         $this->assertCount($annotations ? 7 : 6, $calls);
         $this->assertSame('setConstraintValidatorFactory', $calls[0][0]);
-        $this->assertEquals(array(new Reference('validator.validator_factory')), $calls[0][1]);
+        $this->assertEquals([new Reference('validator.validator_factory')], $calls[0][1]);
         $this->assertSame('setTranslator', $calls[1][0]);
-        $this->assertEquals(array(new Reference('translator')), $calls[1][1]);
+        $this->assertEquals([new Reference('translator')], $calls[1][1]);
         $this->assertSame('setTranslationDomain', $calls[2][0]);
-        $this->assertSame(array('%validator.translation_domain%'), $calls[2][1]);
+        $this->assertSame(['%validator.translation_domain%'], $calls[2][1]);
         $this->assertSame('addXmlMappings', $calls[3][0]);
-        $this->assertSame(array($xmlMappings), $calls[3][1]);
+        $this->assertSame([$xmlMappings], $calls[3][1]);
         $i = 3;
         if ($annotations) {
             $this->assertSame('enableAnnotationMapping', $calls[++$i][0]);
         }
         $this->assertSame('addMethodMapping', $calls[++$i][0]);
-        $this->assertSame(array('loadValidatorMetadata'), $calls[$i][1]);
+        $this->assertSame(['loadValidatorMetadata'], $calls[$i][1]);
         $this->assertSame('setMetadataCache', $calls[++$i][0]);
-        $this->assertEquals(array(new Reference('validator.mapping.cache.symfony')), $calls[$i][1]);
+        $this->assertEquals([new Reference('validator.mapping.cache.symfony')], $calls[$i][1]);
     }
 
     public function testValidationService()
     {
-        $container = $this->createContainerFromFile('validation_annotations', array('kernel.charset' => 'UTF-8'), false);
+        $container = $this->createContainerFromFile('validation_annotations', ['kernel.charset' => 'UTF-8'], false);
 
         $this->assertInstanceOf('Symfony\Component\Validator\Validator\ValidatorInterface', $container->get('validator'));
     }
 
     public function testAnnotations()
     {
-        $container = $this->createContainerFromFile('full', array(), true, false);
+        $container = $this->createContainerFromFile('full', [], true, false);
         $container->addCompilerPass(new TestAnnotationsPass());
         $container->compile();
 
@@ -869,11 +869,11 @@ abstract class FrameworkExtensionTest extends TestCase
 
         $this->assertCount(7, $calls);
         $this->assertSame('enableAnnotationMapping', $calls[4][0]);
-        $this->assertEquals(array(new Reference('annotation_reader')), $calls[4][1]);
+        $this->assertEquals([new Reference('annotation_reader')], $calls[4][1]);
         $this->assertSame('addMethodMapping', $calls[5][0]);
-        $this->assertSame(array('loadValidatorMetadata'), $calls[5][1]);
+        $this->assertSame(['loadValidatorMetadata'], $calls[5][1]);
         $this->assertSame('setMetadataCache', $calls[6][0]);
-        $this->assertEquals(array(new Reference('validator.mapping.cache.symfony')), $calls[6][1]);
+        $this->assertEquals([new Reference('validator.mapping.cache.symfony')], $calls[6][1]);
         // no cache this time
     }
 
@@ -881,10 +881,10 @@ abstract class FrameworkExtensionTest extends TestCase
     {
         require_once __DIR__.'/Fixtures/TestBundle/TestBundle.php';
 
-        $container = $this->createContainerFromFile('validation_annotations', array(
-            'kernel.bundles' => array('TestBundle' => 'Symfony\\Bundle\\FrameworkBundle\\Tests\\TestBundle'),
-            'kernel.bundles_metadata' => array('TestBundle' => array('namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/TestBundle')),
-        ));
+        $container = $this->createContainerFromFile('validation_annotations', [
+            'kernel.bundles' => ['TestBundle' => 'Symfony\\Bundle\\FrameworkBundle\\Tests\\TestBundle'],
+            'kernel.bundles_metadata' => ['TestBundle' => ['namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/TestBundle']],
+        ]);
 
         $calls = $container->getDefinition('validator.builder')->getMethodCalls();
 
@@ -893,9 +893,9 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertSame('addYamlMappings', $calls[4][0]);
         $this->assertSame('enableAnnotationMapping', $calls[5][0]);
         $this->assertSame('addMethodMapping', $calls[6][0]);
-        $this->assertSame(array('loadValidatorMetadata'), $calls[6][1]);
+        $this->assertSame(['loadValidatorMetadata'], $calls[6][1]);
         $this->assertSame('setMetadataCache', $calls[7][0]);
-        $this->assertEquals(array(new Reference('validator.mapping.cache.symfony')), $calls[7][1]);
+        $this->assertEquals([new Reference('validator.mapping.cache.symfony')], $calls[7][1]);
 
         $xmlMappings = $calls[3][1][0];
         $this->assertCount(3, $xmlMappings);
@@ -917,10 +917,10 @@ abstract class FrameworkExtensionTest extends TestCase
     {
         require_once __DIR__.'/Fixtures/CustomPathBundle/src/CustomPathBundle.php';
 
-        $container = $this->createContainerFromFile('validation_annotations', array(
-            'kernel.bundles' => array('CustomPathBundle' => 'Symfony\\Bundle\\FrameworkBundle\\Tests\\CustomPathBundle'),
-            'kernel.bundles_metadata' => array('TestBundle' => array('namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/CustomPathBundle')),
-        ));
+        $container = $this->createContainerFromFile('validation_annotations', [
+            'kernel.bundles' => ['CustomPathBundle' => 'Symfony\\Bundle\\FrameworkBundle\\Tests\\CustomPathBundle'],
+            'kernel.bundles_metadata' => ['TestBundle' => ['namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/CustomPathBundle']],
+        ]);
 
         $calls = $container->getDefinition('validator.builder')->getMethodCalls();
         $xmlMappings = $calls[3][1][0];
@@ -955,7 +955,7 @@ abstract class FrameworkExtensionTest extends TestCase
             $this->assertSame('enableAnnotationMapping', $calls[++$i][0]);
         }
         $this->assertSame('setMetadataCache', $calls[++$i][0]);
-        $this->assertEquals(array(new Reference('validator.mapping.cache.symfony')), $calls[$i][1]);
+        $this->assertEquals([new Reference('validator.mapping.cache.symfony')], $calls[$i][1]);
         // no cache, no annotations, no static methods
     }
 
@@ -1031,19 +1031,19 @@ abstract class FrameworkExtensionTest extends TestCase
 
     public function testStopwatchEnabledWithDebugModeEnabled()
     {
-        $container = $this->createContainerFromFile('default_config', array(
+        $container = $this->createContainerFromFile('default_config', [
             'kernel.container_class' => 'foo',
             'kernel.debug' => true,
-        ));
+        ]);
 
         $this->assertTrue($container->has('debug.stopwatch'));
     }
 
     public function testStopwatchEnabledWithDebugModeDisabled()
     {
-        $container = $this->createContainerFromFile('default_config', array(
+        $container = $this->createContainerFromFile('default_config', [
             'kernel.container_class' => 'foo',
-        ));
+        ]);
 
         $this->assertTrue($container->has('debug.stopwatch'));
     }
@@ -1066,8 +1066,8 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertNull($container->getDefinition('serializer.mapping.class_metadata_factory')->getArgument(1));
         $this->assertEquals(new Reference('serializer.name_converter.camel_case_to_snake_case'), $container->getDefinition('serializer.name_converter.metadata_aware')->getArgument(1));
         $this->assertEquals(new Reference('property_info', ContainerBuilder::IGNORE_ON_INVALID_REFERENCE), $container->getDefinition('serializer.normalizer.object')->getArgument(3));
-        $this->assertEquals(array('setCircularReferenceHandler', array(new Reference('my.circular.reference.handler'))), $container->getDefinition('serializer.normalizer.object')->getMethodCalls()[0]);
-        $this->assertEquals(array('setMaxDepthHandler', array(new Reference('my.max.depth.handler'))), $container->getDefinition('serializer.normalizer.object')->getMethodCalls()[1]);
+        $this->assertEquals(['setCircularReferenceHandler', [new Reference('my.circular.reference.handler')]], $container->getDefinition('serializer.normalizer.object')->getMethodCalls()[0]);
+        $this->assertEquals(['setMaxDepthHandler', [new Reference('my.max.depth.handler')]], $container->getDefinition('serializer.normalizer.object')->getMethodCalls()[1]);
     }
 
     public function testRegisterSerializerExtractor()
@@ -1079,7 +1079,7 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->assertEquals('serializer.mapping.class_metadata_factory', $serializerExtractorDefinition->getArgument(0)->__toString());
         $this->assertFalse($serializerExtractorDefinition->isPublic());
         $tag = $serializerExtractorDefinition->getTag('property_info.list_extractor');
-        $this->assertEquals(array('priority' => -999), $tag[0]);
+        $this->assertEquals(['priority' => -999], $tag[0]);
     }
 
     public function testDataUriNormalizerRegistered()
@@ -1153,25 +1153,25 @@ abstract class FrameworkExtensionTest extends TestCase
 
     public function testSerializerCacheDisabled()
     {
-        $container = $this->createContainerFromFile('serializer_enabled', array('kernel.debug' => true, 'kernel.container_class' => __CLASS__));
+        $container = $this->createContainerFromFile('serializer_enabled', ['kernel.debug' => true, 'kernel.container_class' => __CLASS__]);
         $this->assertFalse($container->hasDefinition('serializer.mapping.cache_class_metadata_factory'));
     }
 
     public function testSerializerMapping()
     {
-        $container = $this->createContainerFromFile('serializer_mapping', array('kernel.bundles_metadata' => array('TestBundle' => array('namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/TestBundle'))));
+        $container = $this->createContainerFromFile('serializer_mapping', ['kernel.bundles_metadata' => ['TestBundle' => ['namespace' => 'Symfony\\Bundle\\FrameworkBundle\\Tests', 'path' => __DIR__.'/Fixtures/TestBundle']]]);
         $projectDir = $container->getParameter('kernel.project_dir');
         $configDir = __DIR__.'/Fixtures/TestBundle/Resources/config';
-        $expectedLoaders = array(
-            new Definition(AnnotationLoader::class, array(new Reference('annotation_reader'))),
-            new Definition(XmlFileLoader::class, array($configDir.'/serialization.xml')),
-            new Definition(YamlFileLoader::class, array($configDir.'/serialization.yml')),
-            new Definition(YamlFileLoader::class, array($projectDir.'/config/serializer/foo.yml')),
-            new Definition(XmlFileLoader::class, array($configDir.'/serializer_mapping/files/foo.xml')),
-            new Definition(YamlFileLoader::class, array($configDir.'/serializer_mapping/files/foo.yml')),
-            new Definition(YamlFileLoader::class, array($configDir.'/serializer_mapping/serialization.yml')),
-            new Definition(YamlFileLoader::class, array($configDir.'/serializer_mapping/serialization.yaml')),
-        );
+        $expectedLoaders = [
+            new Definition(AnnotationLoader::class, [new Reference('annotation_reader')]),
+            new Definition(XmlFileLoader::class, [$configDir.'/serialization.xml']),
+            new Definition(YamlFileLoader::class, [$configDir.'/serialization.yml']),
+            new Definition(YamlFileLoader::class, [$projectDir.'/config/serializer/foo.yml']),
+            new Definition(XmlFileLoader::class, [$configDir.'/serializer_mapping/files/foo.xml']),
+            new Definition(YamlFileLoader::class, [$configDir.'/serializer_mapping/files/foo.yml']),
+            new Definition(YamlFileLoader::class, [$configDir.'/serializer_mapping/serialization.yml']),
+            new Definition(YamlFileLoader::class, [$configDir.'/serializer_mapping/serialization.yaml']),
+        ];
 
         foreach ($expectedLoaders as $definition) {
             if (is_file($arg = $definition->getArgument(0))) {
@@ -1241,9 +1241,9 @@ abstract class FrameworkExtensionTest extends TestCase
 
     public function testEventDispatcherService()
     {
-        $container = $this->createContainer(array('kernel.charset' => 'UTF-8', 'kernel.secret' => 'secret'));
+        $container = $this->createContainer(['kernel.charset' => 'UTF-8', 'kernel.secret' => 'secret']);
         $container->registerExtension(new FrameworkExtension());
-        $container->getCompilerPassConfig()->setBeforeOptimizationPasses(array(new LoggerPass()));
+        $container->getCompilerPassConfig()->setBeforeOptimizationPasses([new LoggerPass()]);
         $this->loadFromFile($container, 'default_config');
         $container
             ->register('foo', \stdClass::class)
@@ -1294,18 +1294,18 @@ abstract class FrameworkExtensionTest extends TestCase
 
     public function testRemovesResourceCheckerConfigCacheFactoryArgumentOnlyIfNoDebug()
     {
-        $container = $this->createContainer(array('kernel.debug' => true));
-        (new FrameworkExtension())->load(array(), $container);
+        $container = $this->createContainer(['kernel.debug' => true]);
+        (new FrameworkExtension())->load([], $container);
         $this->assertCount(1, $container->getDefinition('config_cache_factory')->getArguments());
 
-        $container = $this->createContainer(array('kernel.debug' => false));
-        (new FrameworkExtension())->load(array(), $container);
+        $container = $this->createContainer(['kernel.debug' => false]);
+        (new FrameworkExtension())->load([], $container);
         $this->assertEmpty($container->getDefinition('config_cache_factory')->getArguments());
     }
 
     public function testLoggerAwareRegistration()
     {
-        $container = $this->createContainerFromFile('full', array(), true, false);
+        $container = $this->createContainerFromFile('full', [], true, false);
         $container->addCompilerPass(new ResolveInstanceofConditionalsPass());
         $container->register('foo', LoggerAwareInterface::class)
             ->setAutoconfigured(true);
@@ -1323,15 +1323,15 @@ abstract class FrameworkExtensionTest extends TestCase
     {
         $container = $this->createContainerFromFile('session_cookie_secure_auto');
 
-        $expected = array('session', 'initialized_session', 'session_storage', 'request_stack');
+        $expected = ['session', 'initialized_session', 'session_storage', 'request_stack'];
         $this->assertEquals($expected, array_keys($container->getDefinition('session_listener')->getArgument(0)->getValues()));
     }
 
-    protected function createContainer(array $data = array())
+    protected function createContainer(array $data = [])
     {
-        return new ContainerBuilder(new ParameterBag(array_merge(array(
-            'kernel.bundles' => array('FrameworkBundle' => 'Symfony\\Bundle\\FrameworkBundle\\FrameworkBundle'),
-            'kernel.bundles_metadata' => array('FrameworkBundle' => array('namespace' => 'Symfony\\Bundle\\FrameworkBundle', 'path' => __DIR__.'/../..')),
+        return new ContainerBuilder(new ParameterBag(array_merge([
+            'kernel.bundles' => ['FrameworkBundle' => 'Symfony\\Bundle\\FrameworkBundle\\FrameworkBundle'],
+            'kernel.bundles_metadata' => ['FrameworkBundle' => ['namespace' => 'Symfony\\Bundle\\FrameworkBundle', 'path' => __DIR__.'/../..']],
             'kernel.cache_dir' => __DIR__,
             'kernel.project_dir' => __DIR__,
             'kernel.debug' => false,
@@ -1342,10 +1342,10 @@ abstract class FrameworkExtensionTest extends TestCase
             'container.build_hash' => 'Abc1234',
             'container.build_id' => hash('crc32', 'Abc123423456789'),
             'container.build_time' => 23456789,
-        ), $data)));
+        ], $data)));
     }
 
-    protected function createContainerFromFile($file, $data = array(), $resetCompilerPasses = true, $compile = true)
+    protected function createContainerFromFile($file, $data = [], $resetCompilerPasses = true, $compile = true)
     {
         $cacheKey = md5(\get_class($this).$file.serialize($data));
         if ($compile && isset(self::$containerCache[$cacheKey])) {
@@ -1356,12 +1356,12 @@ abstract class FrameworkExtensionTest extends TestCase
         $this->loadFromFile($container, $file);
 
         if ($resetCompilerPasses) {
-            $container->getCompilerPassConfig()->setOptimizationPasses(array());
-            $container->getCompilerPassConfig()->setRemovingPasses(array());
+            $container->getCompilerPassConfig()->setOptimizationPasses([]);
+            $container->getCompilerPassConfig()->setRemovingPasses([]);
         }
-        $container->getCompilerPassConfig()->setBeforeOptimizationPasses(array(new LoggerPass()));
-        $container->getCompilerPassConfig()->setBeforeRemovingPasses(array(new AddConstraintValidatorsPass(), new TranslatorPass('translator.default', 'translation.reader')));
-        $container->getCompilerPassConfig()->setAfterRemovingPasses(array(new AddAnnotationsCachedReaderPass()));
+        $container->getCompilerPassConfig()->setBeforeOptimizationPasses([new LoggerPass()]);
+        $container->getCompilerPassConfig()->setBeforeRemovingPasses([new AddConstraintValidatorsPass(), new TranslatorPass('translator.default', 'translation.reader')]);
+        $container->getCompilerPassConfig()->setAfterRemovingPasses([new AddAnnotationsCachedReaderPass()]);
 
         if (!$compile) {
             return $container;
@@ -1371,15 +1371,15 @@ abstract class FrameworkExtensionTest extends TestCase
         return self::$containerCache[$cacheKey] = $container;
     }
 
-    protected function createContainerFromClosure($closure, $data = array())
+    protected function createContainerFromClosure($closure, $data = [])
     {
         $container = $this->createContainer($data);
         $container->registerExtension(new FrameworkExtension());
         $loader = new ClosureLoader($container);
         $loader->load($closure);
 
-        $container->getCompilerPassConfig()->setOptimizationPasses(array());
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
         $container->compile();
 
         return $container;
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/PhpFrameworkExtensionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/PhpFrameworkExtensionTest.php
index c554532c7a..ec39372b1d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/PhpFrameworkExtensionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/PhpFrameworkExtensionTest.php
@@ -29,12 +29,12 @@ class PhpFrameworkExtensionTest extends FrameworkExtensionTest
     public function testAssetsCannotHavePathAndUrl()
     {
         $this->createContainerFromClosure(function ($container) {
-            $container->loadFromExtension('framework', array(
-                'assets' => array(
+            $container->loadFromExtension('framework', [
+                'assets' => [
                     'base_urls' => 'http://cdn.example.com',
                     'base_path' => '/foo',
-                ),
-            ));
+                ],
+            ]);
         });
     }
 
@@ -44,16 +44,16 @@ class PhpFrameworkExtensionTest extends FrameworkExtensionTest
     public function testAssetPackageCannotHavePathAndUrl()
     {
         $this->createContainerFromClosure(function ($container) {
-            $container->loadFromExtension('framework', array(
-                'assets' => array(
-                    'packages' => array(
-                        'impossible' => array(
+            $container->loadFromExtension('framework', [
+                'assets' => [
+                    'packages' => [
+                        'impossible' => [
                             'base_urls' => 'http://cdn.example.com',
                             'base_path' => '/foo',
-                        ),
-                    ),
-                ),
-            ));
+                        ],
+                    ],
+                ],
+            ]);
         });
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/EventListener/ResolveControllerNameSubscriberTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/EventListener/ResolveControllerNameSubscriberTest.php
index 338c1ec81a..92211dc341 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/EventListener/ResolveControllerNameSubscriberTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/EventListener/ResolveControllerNameSubscriberTest.php
@@ -57,7 +57,7 @@ class ResolveControllerNameSubscriberTest extends TestCase
 
     public function provideSkippedControllers()
     {
-        yield array('Other:format');
-        yield array(function () {});
+        yield ['Other:format'];
+        yield [function () {}];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/Resources/views/translation.html.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/Resources/views/translation.html.php
index 1dcc5536c1..b8a20d246a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/Resources/views/translation.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/Resources/views/translation.html.php
@@ -29,21 +29,21 @@ EOF
 <?php echo $view['translator']->transChoice(
     '{0} There is no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
     10,
-    array('%count%' => 10)
+    ['%count%' => 10]
 ) ?>
 
-<?php echo $view['translator']->trans('other-domain-test-no-params-short-array', array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-no-params-short-array', [], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-no-params-long-array', array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-no-params-long-array', [], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-params-short-array', array('foo' => 'bar'), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-params-short-array', ['foo' => 'bar'], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-params-long-array', array('foo' => 'bar'), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-params-long-array', ['foo' => 'bar'], 'not_messages'); ?>
 
-<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-short-array-%count%', 10, array('%count%' => 10), 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-short-array-%count%', 10, ['%count%' => 10], 'not_messages'); ?>
 
-<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-long-array-%count%', 10, array('%count%' => 10), 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-long-array-%count%', 10, ['%count%' => 10], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('typecast', array('a' => (int) '123'), 'not_messages'); ?>
-<?php echo $view['translator']->transChoice('msg1', 10 + 1, array(), 'not_messages'); ?>
-<?php echo $view['translator']->transChoice('msg2', ceil(4.5), array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('typecast', ['a' => (int) '123'], 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('msg1', 10 + 1, [], 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('msg2', ceil(4.5), [], 'not_messages'); ?>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/templates.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/templates.php
index b97a6ba6a7..c9a7ad7a1d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/templates.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Fixtures/templates.php
@@ -1,5 +1,5 @@
 <?php
 
-return array(
+return [
     'bundle:controller:name.format.engine' => __DIR__.'/../Fixtures/Resources/views/this.is.a.template.format.engine',
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AnnotatedControllerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AnnotatedControllerTest.php
index 2fdbef8839..51a3e7ee54 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AnnotatedControllerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AnnotatedControllerTest.php
@@ -18,7 +18,7 @@ class AnnotatedControllerTest extends WebTestCase
      */
     public function testAnnotatedController($path, $expectedValue)
     {
-        $client = $this->createClient(array('test_case' => 'AnnotatedController', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'AnnotatedController', 'root_config' => 'config.yml']);
         $client->request('GET', '/annotated'.$path);
 
         $this->assertSame(200, $client->getResponse()->getStatusCode());
@@ -27,13 +27,13 @@ class AnnotatedControllerTest extends WebTestCase
 
     public function getRoutes()
     {
-        return array(
-            array('/null_request', 'Symfony\Component\HttpFoundation\Request'),
-            array('/null_argument', ''),
-            array('/null_argument_with_route_param', ''),
-            array('/null_argument_with_route_param/value', 'value'),
-            array('/argument_with_route_param_and_default', 'value'),
-            array('/argument_with_route_param_and_default/custom', 'custom'),
-        );
+        return [
+            ['/null_request', 'Symfony\Component\HttpFoundation\Request'],
+            ['/null_argument', ''],
+            ['/null_argument_with_route_param', ''],
+            ['/null_argument_with_route_param/value', 'value'],
+            ['/argument_with_route_param_and_default', 'value'],
+            ['/argument_with_route_param_and_default/custom', 'custom'],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AutowiringTypesTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AutowiringTypesTest.php
index 76f0dd6bed..43f91f5213 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AutowiringTypesTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/AutowiringTypesTest.php
@@ -23,7 +23,7 @@ class AutowiringTypesTest extends WebTestCase
 {
     public function testAnnotationReaderAutowiring()
     {
-        static::bootKernel(array('root_config' => 'no_annotations_cache.yml', 'environment' => 'no_annotations_cache'));
+        static::bootKernel(['root_config' => 'no_annotations_cache.yml', 'environment' => 'no_annotations_cache']);
 
         $annotationReader = static::$container->get('test.autowiring_types.autowired_services')->getAnnotationReader();
         $this->assertInstanceOf(AnnotationReader::class, $annotationReader);
@@ -48,12 +48,12 @@ class AutowiringTypesTest extends WebTestCase
 
     public function testEventDispatcherAutowiring()
     {
-        static::bootKernel(array('debug' => false));
+        static::bootKernel(['debug' => false]);
 
         $autowiredServices = static::$container->get('test.autowiring_types.autowired_services');
         $this->assertInstanceOf(EventDispatcher::class, $autowiredServices->getDispatcher(), 'The event_dispatcher service should be injected if the debug is not enabled');
 
-        static::bootKernel(array('debug' => true));
+        static::bootKernel(['debug' => true]);
 
         $autowiredServices = static::$container->get('test.autowiring_types.autowired_services');
         $this->assertInstanceOf(TraceableEventDispatcher::class, $autowiredServices->getDispatcher(), 'The debug.event_dispatcher service should be injected if the debug is enabled');
@@ -67,8 +67,8 @@ class AutowiringTypesTest extends WebTestCase
         $this->assertInstanceOf(FilesystemAdapter::class, $autowiredServices->getCachePool());
     }
 
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
-        return parent::createKernel(array('test_case' => 'AutowiringTypes') + $options);
+        return parent::createKernel(['test_case' => 'AutowiringTypes'] + $options);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/FragmentController.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/FragmentController.php
index 88bd102a5f..aa78c87190 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/FragmentController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/FragmentController.php
@@ -22,7 +22,7 @@ class FragmentController implements ContainerAwareInterface
 
     public function indexAction(Request $request)
     {
-        return $this->container->get('templating')->renderResponse('fragment.html.php', array('bar' => new Bar()));
+        return $this->container->get('templating')->renderResponse('fragment.html.php', ['bar' => new Bar()]);
     }
 
     public function inlinedAction($options, $_format)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestController.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestController.php
index b1e4f79dc1..30f364def4 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestController.php
@@ -23,12 +23,12 @@ class SubRequestController implements ContainerAwareInterface
 
     public function indexAction($handler)
     {
-        $errorUrl = $this->generateUrl('subrequest_fragment_error', array('_locale' => 'fr', '_format' => 'json'));
-        $altUrl = $this->generateUrl('subrequest_fragment', array('_locale' => 'fr', '_format' => 'json'));
+        $errorUrl = $this->generateUrl('subrequest_fragment_error', ['_locale' => 'fr', '_format' => 'json']);
+        $altUrl = $this->generateUrl('subrequest_fragment', ['_locale' => 'fr', '_format' => 'json']);
 
         // simulates a failure during the rendering of a fragment...
         // should render fr/json
-        $content = $handler->render($errorUrl, 'inline', array('alt' => $altUrl));
+        $content = $handler->render($errorUrl, 'inline', ['alt' => $altUrl]);
 
         // ...to check that the FragmentListener still references the right Request
         // when rendering another fragment after the error occurred
@@ -59,7 +59,7 @@ class SubRequestController implements ContainerAwareInterface
         throw new \RuntimeException('error');
     }
 
-    protected function generateUrl($name, $arguments = array())
+    protected function generateUrl($name, $arguments = [])
     {
         return $this->container->get('router')->generate($name, $arguments);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestServiceResolutionController.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestServiceResolutionController.php
index 707edbc6dd..df8a17caa8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestServiceResolutionController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/SubRequestServiceResolutionController.php
@@ -25,7 +25,7 @@ class SubRequestServiceResolutionController implements ContainerAwareInterface
     {
         $request = $this->container->get('request_stack')->getCurrentRequest();
         $path['_controller'] = self::class.'::fragmentAction';
-        $subRequest = $request->duplicate(array(), null, $path);
+        $subRequest = $request->duplicate([], null, $path);
 
         return $this->container->get('http_kernel')->handle($subRequest, HttpKernelInterface::SUB_REQUEST);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php
index 66489374f6..59670fdd19 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/DependencyInjection/TestExtension.php
@@ -36,7 +36,7 @@ class TestExtension extends Extension implements PrependExtensionInterface
      */
     public function prepend(ContainerBuilder $container)
     {
-        $container->prependExtensionConfig('test', array('custom' => 'foo'));
+        $container->prependExtensionConfig('test', ['custom' => 'foo']);
     }
 
     /**
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolClearCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolClearCommandTest.php
index 3a77541521..af57ec9ad9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolClearCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolClearCommandTest.php
@@ -22,13 +22,13 @@ class CachePoolClearCommandTest extends WebTestCase
 {
     protected function setUp()
     {
-        static::bootKernel(array('test_case' => 'CachePoolClear', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'CachePoolClear', 'root_config' => 'config.yml']);
     }
 
     public function testClearPrivatePool()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('pools' => array('cache.private_pool')), array('decorated' => false));
+        $tester->execute(['pools' => ['cache.private_pool']], ['decorated' => false]);
 
         $this->assertSame(0, $tester->getStatusCode(), 'cache:pool:clear exits with 0 in case of success');
         $this->assertContains('Clearing cache pool: cache.private_pool', $tester->getDisplay());
@@ -38,7 +38,7 @@ class CachePoolClearCommandTest extends WebTestCase
     public function testClearPublicPool()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('pools' => array('cache.public_pool')), array('decorated' => false));
+        $tester->execute(['pools' => ['cache.public_pool']], ['decorated' => false]);
 
         $this->assertSame(0, $tester->getStatusCode(), 'cache:pool:clear exits with 0 in case of success');
         $this->assertContains('Clearing cache pool: cache.public_pool', $tester->getDisplay());
@@ -48,7 +48,7 @@ class CachePoolClearCommandTest extends WebTestCase
     public function testClearPoolWithCustomClearer()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('pools' => array('cache.pool_with_clearer')), array('decorated' => false));
+        $tester->execute(['pools' => ['cache.pool_with_clearer']], ['decorated' => false]);
 
         $this->assertSame(0, $tester->getStatusCode(), 'cache:pool:clear exits with 0 in case of success');
         $this->assertContains('Clearing cache pool: cache.pool_with_clearer', $tester->getDisplay());
@@ -58,7 +58,7 @@ class CachePoolClearCommandTest extends WebTestCase
     public function testCallClearer()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('pools' => array('cache.app_clearer')), array('decorated' => false));
+        $tester->execute(['pools' => ['cache.app_clearer']], ['decorated' => false]);
 
         $this->assertSame(0, $tester->getStatusCode(), 'cache:pool:clear exits with 0 in case of success');
         $this->assertContains('Calling cache clearer: cache.app_clearer', $tester->getDisplay());
@@ -72,7 +72,7 @@ class CachePoolClearCommandTest extends WebTestCase
     public function testClearUnexistingPool()
     {
         $this->createCommandTester()
-            ->execute(array('pools' => array('unknown_pool')), array('decorated' => false));
+            ->execute(['pools' => ['unknown_pool']], ['decorated' => false]);
     }
 
     private function createCommandTester()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolsTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolsTest.php
index d152f5cd87..e970e17c6e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolsTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/CachePoolsTest.php
@@ -20,7 +20,7 @@ class CachePoolsTest extends WebTestCase
 {
     public function testCachePools()
     {
-        $this->doTestCachePools(array(), AdapterInterface::class);
+        $this->doTestCachePools([], AdapterInterface::class);
     }
 
     /**
@@ -29,7 +29,7 @@ class CachePoolsTest extends WebTestCase
     public function testRedisCachePools()
     {
         try {
-            $this->doTestCachePools(array('root_config' => 'redis_config.yml', 'environment' => 'redis_cache'), RedisAdapter::class);
+            $this->doTestCachePools(['root_config' => 'redis_config.yml', 'environment' => 'redis_cache'], RedisAdapter::class);
         } catch (\PHPUnit\Framework\Error\Warning $e) {
             if (0 !== strpos($e->getMessage(), 'unable to connect to')) {
                 throw $e;
@@ -54,7 +54,7 @@ class CachePoolsTest extends WebTestCase
     public function testRedisCustomCachePools()
     {
         try {
-            $this->doTestCachePools(array('root_config' => 'redis_custom_config.yml', 'environment' => 'custom_redis_cache'), RedisAdapter::class);
+            $this->doTestCachePools(['root_config' => 'redis_custom_config.yml', 'environment' => 'custom_redis_cache'], RedisAdapter::class);
         } catch (\PHPUnit\Framework\Error\Warning $e) {
             if (0 !== strpos($e->getMessage(), 'unable to connect to')) {
                 throw $e;
@@ -116,8 +116,8 @@ class CachePoolsTest extends WebTestCase
         $this->assertNotInstanceof(TagAwareAdapter::class, $pool7);
     }
 
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
-        return parent::createKernel(array('test_case' => 'CachePools') + $options);
+        return parent::createKernel(['test_case' => 'CachePools'] + $options);
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDebugCommandTest.php
index a98879938d..2c0a75481b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDebugCommandTest.php
@@ -25,15 +25,15 @@ class ConfigDebugCommandTest extends WebTestCase
 
     protected function setUp()
     {
-        $kernel = static::createKernel(array('test_case' => 'ConfigDump', 'root_config' => 'config.yml'));
+        $kernel = static::createKernel(['test_case' => 'ConfigDump', 'root_config' => 'config.yml']);
         $this->application = new Application($kernel);
-        $this->application->doRun(new ArrayInput(array()), new NullOutput());
+        $this->application->doRun(new ArrayInput([]), new NullOutput());
     }
 
     public function testDumpBundleName()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('name' => 'TestBundle'));
+        $ret = $tester->execute(['name' => 'TestBundle']);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('custom: foo', $tester->getDisplay());
@@ -42,7 +42,7 @@ class ConfigDebugCommandTest extends WebTestCase
     public function testDumpBundleOption()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('name' => 'TestBundle', 'path' => 'custom'));
+        $ret = $tester->execute(['name' => 'TestBundle', 'path' => 'custom']);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('foo', $tester->getDisplay());
@@ -51,7 +51,7 @@ class ConfigDebugCommandTest extends WebTestCase
     public function testParametersValuesAreResolved()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('name' => 'framework'));
+        $ret = $tester->execute(['name' => 'framework']);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains("locale: '%env(LOCALE)%'", $tester->getDisplay());
@@ -61,7 +61,7 @@ class ConfigDebugCommandTest extends WebTestCase
     public function testDumpUndefinedBundleOption()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('name' => 'TestBundle', 'path' => 'foo'));
+        $tester->execute(['name' => 'TestBundle', 'path' => 'foo']);
 
         $this->assertContains('Unable to find configuration for "test.foo"', $tester->getDisplay());
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
index 3817afed17..a4cfd6cfa9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ConfigDumpReferenceCommandTest.php
@@ -25,15 +25,15 @@ class ConfigDumpReferenceCommandTest extends WebTestCase
 
     protected function setUp()
     {
-        $kernel = static::createKernel(array('test_case' => 'ConfigDump', 'root_config' => 'config.yml'));
+        $kernel = static::createKernel(['test_case' => 'ConfigDump', 'root_config' => 'config.yml']);
         $this->application = new Application($kernel);
-        $this->application->doRun(new ArrayInput(array()), new NullOutput());
+        $this->application->doRun(new ArrayInput([]), new NullOutput());
     }
 
     public function testDumpBundleName()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('name' => 'TestBundle'));
+        $ret = $tester->execute(['name' => 'TestBundle']);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('test:', $tester->getDisplay());
@@ -43,10 +43,10 @@ class ConfigDumpReferenceCommandTest extends WebTestCase
     public function testDumpAtPath()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array(
+        $ret = $tester->execute([
             'name' => 'test',
             'path' => 'array',
-        ));
+        ]);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertSame(<<<'EOL'
@@ -63,11 +63,11 @@ EOL
     public function testDumpAtPathXml()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array(
+        $ret = $tester->execute([
             'name' => 'test',
             'path' => 'array',
             '--format' => 'xml',
-        ));
+        ]);
 
         $this->assertSame(1, $ret);
         $this->assertContains('[ERROR] The "path" option is only available for the "yaml" format.', $tester->getDisplay());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDebugCommandTest.php
index e38941a3c8..93028bf8c2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDebugCommandTest.php
@@ -22,7 +22,7 @@ class ContainerDebugCommandTest extends WebTestCase
 {
     public function testDumpContainerIfNotExists()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
@@ -30,37 +30,37 @@ class ContainerDebugCommandTest extends WebTestCase
         @unlink(static::$container->getParameter('debug.container.dump'));
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:container'));
+        $tester->run(['command' => 'debug:container']);
 
         $this->assertFileExists(static::$container->getParameter('debug.container.dump'));
     }
 
     public function testNoDebug()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml', 'debug' => false));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml', 'debug' => false]);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:container'));
+        $tester->run(['command' => 'debug:container']);
 
         $this->assertContains('public', $tester->getDisplay());
     }
 
     public function testPrivateAlias()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:container', '--show-hidden' => true));
+        $tester->run(['command' => 'debug:container', '--show-hidden' => true]);
         $this->assertNotContains('public', $tester->getDisplay());
         $this->assertNotContains('private_alias', $tester->getDisplay());
 
-        $tester->run(array('command' => 'debug:container'));
+        $tester->run(['command' => 'debug:container']);
         $this->assertContains('public', $tester->getDisplay());
         $this->assertContains('private_alias', $tester->getDisplay());
     }
@@ -70,21 +70,21 @@ class ContainerDebugCommandTest extends WebTestCase
      */
     public function testIgnoreBackslashWhenFindingService(string $validServiceId)
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:container', 'name' => $validServiceId));
+        $tester->run(['command' => 'debug:container', 'name' => $validServiceId]);
         $this->assertNotContains('No services found', $tester->getDisplay());
     }
 
     public function provideIgnoreBackslashWhenFindingService()
     {
-        return array(
-            array(BackslashClass::class),
-            array('FixturesBackslashClass'),
-        );
+        return [
+            [BackslashClass::class],
+            ['FixturesBackslashClass'],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDumpTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDumpTest.php
index 1eff55d480..fe0cea4d16 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDumpTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ContainerDumpTest.php
@@ -18,14 +18,14 @@ class ContainerDumpTest extends WebTestCase
 {
     public function testContainerCompilationInDebug()
     {
-        $client = $this->createClient(array('test_case' => 'ContainerDump', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'ContainerDump', 'root_config' => 'config.yml']);
 
         $this->assertTrue(static::$container->has('serializer'));
     }
 
     public function testContainerCompilation()
     {
-        $client = $this->createClient(array('test_case' => 'ContainerDump', 'root_config' => 'config.yml', 'debug' => false));
+        $client = $this->createClient(['test_case' => 'ContainerDump', 'root_config' => 'config.yml', 'debug' => false]);
 
         $this->assertTrue(static::$container->has('serializer'));
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/DebugAutowiringCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/DebugAutowiringCommandTest.php
index 2076a183c3..1c64fbe6ee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/DebugAutowiringCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/DebugAutowiringCommandTest.php
@@ -21,13 +21,13 @@ class DebugAutowiringCommandTest extends WebTestCase
 {
     public function testBasicFunctionality()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:autowiring'));
+        $tester->run(['command' => 'debug:autowiring']);
 
         $this->assertContains('Symfony\Component\HttpKernel\HttpKernelInterface', $tester->getDisplay());
         $this->assertContains('(http_kernel)', $tester->getDisplay());
@@ -35,13 +35,13 @@ class DebugAutowiringCommandTest extends WebTestCase
 
     public function testSearchArgument()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:autowiring', 'search' => 'kern'));
+        $tester->run(['command' => 'debug:autowiring', 'search' => 'kern']);
 
         $this->assertContains('Symfony\Component\HttpKernel\HttpKernelInterface', $tester->getDisplay());
         $this->assertNotContains('Symfony\Component\Routing\RouterInterface', $tester->getDisplay());
@@ -49,25 +49,25 @@ class DebugAutowiringCommandTest extends WebTestCase
 
     public function testSearchIgnoreBackslashWhenFindingService()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:autowiring', 'search' => 'HttpKernelHttpKernelInterface'));
+        $tester->run(['command' => 'debug:autowiring', 'search' => 'HttpKernelHttpKernelInterface']);
         $this->assertContains('Symfony\Component\HttpKernel\HttpKernelInterface', $tester->getDisplay());
     }
 
     public function testSearchNoResults()
     {
-        static::bootKernel(array('test_case' => 'ContainerDebug', 'root_config' => 'config.yml'));
+        static::bootKernel(['test_case' => 'ContainerDebug', 'root_config' => 'config.yml']);
 
         $application = new Application(static::$kernel);
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'debug:autowiring', 'search' => 'foo_fake'), array('capture_stderr_separately' => true));
+        $tester->run(['command' => 'debug:autowiring', 'search' => 'foo_fake'], ['capture_stderr_separately' => true]);
 
         $this->assertContains('No autowirable classes or interfaces found matching "foo_fake"', $tester->getErrorOutput());
         $this->assertEquals(1, $tester->getStatusCode());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/FragmentTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/FragmentTest.php
index dff65d636c..db550a2312 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/FragmentTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/FragmentTest.php
@@ -18,7 +18,7 @@ class FragmentTest extends WebTestCase
      */
     public function testFragment($insulate)
     {
-        $client = $this->createClient(array('test_case' => 'Fragment', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'Fragment', 'root_config' => 'config.yml']);
         if ($insulate) {
             $client->insulate();
         }
@@ -30,9 +30,9 @@ class FragmentTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(
-            array(false),
-            array(true),
-        );
+        return [
+            [false],
+            [true],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ProfilerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ProfilerTest.php
index 2d422b0292..c5252c0d58 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ProfilerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/ProfilerTest.php
@@ -18,7 +18,7 @@ class ProfilerTest extends WebTestCase
      */
     public function testProfilerIsDisabled($insulate)
     {
-        $client = $this->createClient(array('test_case' => 'Profiler', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'Profiler', 'root_config' => 'config.yml']);
         if ($insulate) {
             $client->insulate();
         }
@@ -38,9 +38,9 @@ class ProfilerTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(
-            array(false),
-            array(true),
-        );
+        return [
+            [false],
+            [true],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/PropertyInfoTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/PropertyInfoTest.php
index 6adde22427..61669e90ad 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/PropertyInfoTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/PropertyInfoTest.php
@@ -17,9 +17,9 @@ class PropertyInfoTest extends WebTestCase
 {
     public function testPhpDocPriority()
     {
-        static::bootKernel(array('test_case' => 'Serializer'));
+        static::bootKernel(['test_case' => 'Serializer']);
 
-        $this->assertEquals(array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_INT))), static::$container->get('property_info')->getTypes('Symfony\Bundle\FrameworkBundle\Tests\Functional\Dummy', 'codes'));
+        $this->assertEquals([new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_INT))], static::$container->get('property_info')->getTypes('Symfony\Bundle\FrameworkBundle\Tests\Functional\Dummy', 'codes'));
     }
 }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/RouterDebugCommandTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/RouterDebugCommandTest.php
index 26f6916e9f..73f84f842f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/RouterDebugCommandTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/RouterDebugCommandTest.php
@@ -23,14 +23,14 @@ class RouterDebugCommandTest extends WebTestCase
 
     protected function setUp()
     {
-        $kernel = static::createKernel(array('test_case' => 'RouterDebug', 'root_config' => 'config.yml'));
+        $kernel = static::createKernel(['test_case' => 'RouterDebug', 'root_config' => 'config.yml']);
         $this->application = new Application($kernel);
     }
 
     public function testDumpAllRoutes()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array());
+        $ret = $tester->execute([]);
         $display = $tester->getDisplay();
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
@@ -42,7 +42,7 @@ class RouterDebugCommandTest extends WebTestCase
     public function testDumpOneRoute()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('name' => 'routerdebug_session_welcome'));
+        $ret = $tester->execute(['name' => 'routerdebug_session_welcome']);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('routerdebug_session_welcome', $tester->getDisplay());
@@ -52,8 +52,8 @@ class RouterDebugCommandTest extends WebTestCase
     public function testSearchMultipleRoutes()
     {
         $tester = $this->createCommandTester();
-        $tester->setInputs(array(3));
-        $ret = $tester->execute(array('name' => 'routerdebug'), array('interactive' => true));
+        $tester->setInputs([3]);
+        $ret = $tester->execute(['name' => 'routerdebug'], ['interactive' => true]);
 
         $this->assertSame(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Select one of the matching routes:', $tester->getDisplay());
@@ -68,7 +68,7 @@ class RouterDebugCommandTest extends WebTestCase
     public function testSearchWithThrow()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('name' => 'gerard'), array('interactive' => true));
+        $tester->execute(['name' => 'gerard'], ['interactive' => true]);
     }
 
     private function createCommandTester(): CommandTester
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SerializerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SerializerTest.php
index bdcf462bae..0a92fd2f91 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SerializerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SerializerTest.php
@@ -18,7 +18,7 @@ class SerializerTest extends WebTestCase
 {
     public function testDeserializeArrayOfObject()
     {
-        static::bootKernel(array('test_case' => 'Serializer'));
+        static::bootKernel(['test_case' => 'Serializer']);
 
         $result = static::$container->get('serializer')->deserialize('{"bars": [{"id": 1}, {"id": 2}]}', Foo::class, 'json');
 
@@ -28,7 +28,7 @@ class SerializerTest extends WebTestCase
         $bar2->id = 2;
 
         $expected = new Foo();
-        $expected->bars = array($bar1, $bar2);
+        $expected->bars = [$bar1, $bar2];
 
         $this->assertEquals($expected, $result);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SessionTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SessionTest.php
index 2e1634220c..aad3d77949 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SessionTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SessionTest.php
@@ -20,7 +20,7 @@ class SessionTest extends WebTestCase
      */
     public function testWelcome($config, $insulate)
     {
-        $client = $this->createClient(array('test_case' => 'Session', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'Session', 'root_config' => $config]);
         if ($insulate) {
             $client->insulate();
         }
@@ -53,7 +53,7 @@ class SessionTest extends WebTestCase
      */
     public function testFlash($config, $insulate)
     {
-        $client = $this->createClient(array('test_case' => 'Session', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'Session', 'root_config' => $config]);
         if ($insulate) {
             $client->insulate();
         }
@@ -78,13 +78,13 @@ class SessionTest extends WebTestCase
     public function testTwoClients($config, $insulate)
     {
         // start first client
-        $client1 = $this->createClient(array('test_case' => 'Session', 'root_config' => $config));
+        $client1 = $this->createClient(['test_case' => 'Session', 'root_config' => $config]);
         if ($insulate) {
             $client1->insulate();
         }
 
         // start second client
-        $client2 = $this->createClient(array('test_case' => 'Session', 'root_config' => $config));
+        $client2 = $this->createClient(['test_case' => 'Session', 'root_config' => $config]);
         if ($insulate) {
             $client2->insulate();
         }
@@ -131,7 +131,7 @@ class SessionTest extends WebTestCase
      */
     public function testCorrectCacheControlHeadersForCacheableAction($config, $insulate)
     {
-        $client = $this->createClient(array('test_case' => 'Session', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'Session', 'root_config' => $config]);
         if ($insulate) {
             $client->insulate();
         }
@@ -144,10 +144,10 @@ class SessionTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(
+        return [
             // configfile, insulate
-            array('config.yml', true),
-            array('config.yml', false),
-        );
+            ['config.yml', true],
+            ['config.yml', false],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SubRequestsTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SubRequestsTest.php
index 1a87ff928a..9d040581db 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SubRequestsTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/SubRequestsTest.php
@@ -15,7 +15,7 @@ class SubRequestsTest extends WebTestCase
 {
     public function testStateAfterSubRequest()
     {
-        $client = $this->createClient(array('test_case' => 'Session', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'Session', 'root_config' => 'config.yml']);
         $client->request('GET', 'https://localhost/subrequest/en');
 
         $this->assertEquals('--fr/json--en/html--fr/json--http://localhost/subrequest/fragment/en', $client->getResponse()->getContent());
@@ -23,7 +23,7 @@ class SubRequestsTest extends WebTestCase
 
     public function testSubRequestControllerServicesAreResolved()
     {
-        $client = $this->createClient(array('test_case' => 'ControllerServiceResolution', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'ControllerServiceResolution', 'root_config' => 'config.yml']);
         $client->request('GET', 'https://localhost/subrequest');
 
         $this->assertEquals('---', $client->getResponse()->getContent());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/TestServiceContainerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/TestServiceContainerTest.php
index b50c3e1f0b..baa12ab2d1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/TestServiceContainerTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/TestServiceContainerTest.php
@@ -22,7 +22,7 @@ class TestServiceContainerTest extends WebTestCase
 {
     public function testThatPrivateServicesAreUnavailableIfTestConfigIsDisabled()
     {
-        static::bootKernel(array('test_case' => 'TestServiceContainer', 'root_config' => 'test_disabled.yml', 'environment' => 'test_disabled'));
+        static::bootKernel(['test_case' => 'TestServiceContainer', 'root_config' => 'test_disabled.yml', 'environment' => 'test_disabled']);
 
         $this->assertInstanceOf(ContainerInterface::class, static::$container);
         $this->assertNotInstanceOf(TestContainer::class, static::$container);
@@ -35,7 +35,7 @@ class TestServiceContainerTest extends WebTestCase
 
     public function testThatPrivateServicesAreAvailableIfTestConfigIsEnabled()
     {
-        static::bootKernel(array('test_case' => 'TestServiceContainer'));
+        static::bootKernel(['test_case' => 'TestServiceContainer']);
 
         $this->assertInstanceOf(TestContainer::class, static::$container);
         $this->assertTrue(static::$container->has(PublicService::class));
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
index b25ab8e5a6..3f7bb4c7ee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/WebTestCase.php
@@ -49,7 +49,7 @@ class WebTestCase extends BaseWebTestCase
         return 'Symfony\Bundle\FrameworkBundle\Tests\Functional\app\AppKernel';
     }
 
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
         $class = self::getKernelClass();
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AnnotatedController/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AnnotatedController/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AnnotatedController/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AnnotatedController/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
index 0af9934684..ce54a88ece 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AppKernel.php
@@ -81,7 +81,7 @@ class AppKernel extends Kernel
 
     public function serialize()
     {
-        return serialize(array($this->varDir, $this->testCase, $this->rootConfig, $this->getEnvironment(), $this->isDebug()));
+        return serialize([$this->varDir, $this->testCase, $this->rootConfig, $this->getEnvironment(), $this->isDebug()]);
     }
 
     public function unserialize($str)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AutowiringTypes/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AutowiringTypes/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AutowiringTypes/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/AutowiringTypes/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePoolClear/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePoolClear/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePoolClear/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePoolClear/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePools/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePools/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePools/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/CachePools/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ConfigDump/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDebug/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDebug/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDebug/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDebug/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDump/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDump/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDump/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ContainerDump/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ControllerServiceResolution/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ControllerServiceResolution/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ControllerServiceResolution/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/ControllerServiceResolution/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Fragment/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Fragment/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Fragment/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Fragment/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Profiler/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Profiler/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Profiler/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Profiler/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Resources/views/fragment.html.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Resources/views/fragment.html.php
index ae574bce99..0e89a5b36c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Resources/views/fragment.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Resources/views/fragment.html.php
@@ -1,13 +1,13 @@
-<?php echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::inlinedAction', array(
-            'options' => array(
+<?php echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::inlinedAction', [
+            'options' => [
                 'bar' => $bar,
                 'eleven' => 11,
-            ),
-        )));
+            ],
+        ]));
 ?>--<?php
-        echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::customformatAction', array('_format' => 'html')));
+        echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::customformatAction', ['_format' => 'html']));
 ?>--<?php
-        echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::customlocaleAction', array('_locale' => 'es')));
+        echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::customlocaleAction', ['_locale' => 'es']));
 ?>--<?php
         $app->getRequest()->setLocale('fr');
         echo $this->get('actions')->render($this->get('actions')->controller('Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\FragmentController::forwardlocaleAction'));
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/RouterDebug/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/RouterDebug/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/RouterDebug/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/RouterDebug/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Serializer/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Serializer/bundles.php
index 144db90236..13ab9fddee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Serializer/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Serializer/bundles.php
@@ -11,6 +11,6 @@
 
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 
-return array(
+return [
     new FrameworkBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Session/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Session/bundles.php
index 422ffc917f..15ff182c6f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Session/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Session/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new TestBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/TestServiceContainer/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/TestServiceContainer/bundles.php
index 144db90236..13ab9fddee 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/TestServiceContainer/bundles.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/TestServiceContainer/bundles.php
@@ -11,6 +11,6 @@
 
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 
-return array(
+return [
     new FrameworkBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/ConcreteMicroKernel.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/ConcreteMicroKernel.php
index 3c5a55e338..80fa74bb13 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/ConcreteMicroKernel.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/ConcreteMicroKernel.php
@@ -49,9 +49,9 @@ class ConcreteMicroKernel extends Kernel implements EventSubscriberInterface
 
     public function registerBundles()
     {
-        return array(
+        return [
             new FrameworkBundle(),
-        );
+        ];
     }
 
     public function getCacheDir()
@@ -79,9 +79,9 @@ class ConcreteMicroKernel extends Kernel implements EventSubscriberInterface
     protected function configureContainer(ContainerBuilder $c, LoaderInterface $loader)
     {
         $c->register('logger', NullLogger::class);
-        $c->loadFromExtension('framework', array(
+        $c->loadFromExtension('framework', [
             'secret' => '$ecret',
-        ));
+        ]);
 
         $c->setParameter('halloween', 'Have a great day!');
         $c->register('halloween', 'stdClass')->setPublic(true);
@@ -92,9 +92,9 @@ class ConcreteMicroKernel extends Kernel implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             KernelEvents::EXCEPTION => 'onKernelException',
-        );
+        ];
     }
 }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
index f7f4272fed..1d576056eb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/DelegatingLoaderTest.php
@@ -39,29 +39,29 @@ class DelegatingLoaderTest extends TestCase
             ->willReturn($loader);
 
         $routeCollection = new RouteCollection();
-        $routeCollection->add('foo', new Route('/', array(), array(), array('utf8' => false)));
-        $routeCollection->add('bar', new Route('/', array(), array(), array('foo' => 123)));
+        $routeCollection->add('foo', new Route('/', [], [], ['utf8' => false]));
+        $routeCollection->add('bar', new Route('/', [], [], ['foo' => 123]));
 
         $loader->expects($this->once())
             ->method('load')
             ->willReturn($routeCollection);
 
-        $delegatingLoader = new DelegatingLoader($controllerNameParser, $loaderResolver, array('utf8' => true));
+        $delegatingLoader = new DelegatingLoader($controllerNameParser, $loaderResolver, ['utf8' => true]);
 
         $loadedRouteCollection = $delegatingLoader->load('foo');
         $this->assertCount(2, $loadedRouteCollection);
 
-        $expected = array(
+        $expected = [
             'compiler_class' => 'Symfony\Component\Routing\RouteCompiler',
             'utf8' => false,
-        );
+        ];
         $this->assertSame($expected, $routeCollection->get('foo')->getOptions());
 
-        $expected = array(
+        $expected = [
             'compiler_class' => 'Symfony\Component\Routing\RouteCompiler',
             'foo' => 123,
             'utf8' => true,
-        );
+        ];
         $this->assertSame($expected, $routeCollection->get('bar')->getOptions());
     }
 
@@ -91,9 +91,9 @@ class DelegatingLoaderTest extends TestCase
             ->willReturn($loader);
 
         $routeCollection = new RouteCollection();
-        $routeCollection->add('foo', new Route('/', array('_controller' => 'foo:bar:baz')));
-        $routeCollection->add('bar', new Route('/', array('_controller' => 'foo::baz')));
-        $routeCollection->add('baz', new Route('/', array('_controller' => 'foo:baz')));
+        $routeCollection->add('foo', new Route('/', ['_controller' => 'foo:bar:baz']));
+        $routeCollection->add('bar', new Route('/', ['_controller' => 'foo::baz']));
+        $routeCollection->add('baz', new Route('/', ['_controller' => 'foo:baz']));
 
         $loader->expects($this->once())
             ->method('load')
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
index b5f7a3bd48..d87eee58cc 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RedirectableUrlMatcherTest.php
@@ -26,7 +26,7 @@ class RedirectableUrlMatcherTest extends TestCase
 
         $matcher = new RedirectableUrlMatcher($coll, $context = new RequestContext());
 
-        $this->assertEquals(array(
+        $this->assertEquals([
                 '_controller' => 'Symfony\Bundle\FrameworkBundle\Controller\RedirectController::urlRedirectAction',
                 'path' => '/foo/',
                 'permanent' => true,
@@ -34,7 +34,7 @@ class RedirectableUrlMatcherTest extends TestCase
                 'httpPort' => $context->getHttpPort(),
                 'httpsPort' => $context->getHttpsPort(),
                 '_route' => 'foo',
-            ),
+            ],
             $matcher->match('/foo')
         );
     }
@@ -42,11 +42,11 @@ class RedirectableUrlMatcherTest extends TestCase
     public function testSchemeRedirect()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo', array(), array(), array(), '', array('https')));
+        $coll->add('foo', new Route('/foo', [], [], [], '', ['https']));
 
         $matcher = new RedirectableUrlMatcher($coll, $context = new RequestContext());
 
-        $this->assertEquals(array(
+        $this->assertEquals([
                 '_controller' => 'Symfony\Bundle\FrameworkBundle\Controller\RedirectController::urlRedirectAction',
                 'path' => '/foo',
                 'permanent' => true,
@@ -54,7 +54,7 @@ class RedirectableUrlMatcherTest extends TestCase
                 'httpPort' => $context->getHttpPort(),
                 'httpsPort' => $context->getHttpsPort(),
                 '_route' => 'foo',
-            ),
+            ],
             $matcher->match('/foo')
         );
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
index 20a001a1d6..329f1e7cba 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
@@ -36,24 +36,24 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             ' /{_locale}',
-            array(
+            [
                 '_locale' => '%locale%',
-            ),
-            array(
+            ],
+            [
                 '_locale' => 'en|es',
-            ), array(), '', array(), array(), '"%foo%" == "bar"'
+            ], [], '', [], [], '"%foo%" == "bar"'
         ));
 
         $sc = $this->getPsr11ServiceContainer($routes);
-        $parameters = $this->getParameterBag(array(
+        $parameters = $this->getParameterBag([
             'locale' => 'es',
             'foo' => 'bar',
-        ));
+        ]);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
 
-        $this->assertSame('/en', $router->generate('foo', array('_locale' => 'en')));
-        $this->assertSame('/', $router->generate('foo', array('_locale' => 'es')));
+        $this->assertSame('/en', $router->generate('foo', ['_locale' => 'en']));
+        $this->assertSame('/', $router->generate('foo', ['_locale' => 'es']));
         $this->assertSame('"bar" == "bar"', $router->getRouteCollection()->get('foo')->getCondition());
     }
 
@@ -63,12 +63,12 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             ' /{_locale}',
-            array(
+            [
                 '_locale' => '%locale%',
-            ),
-            array(
+            ],
+            [
                 '_locale' => 'en|es',
-            ), array(), '', array(), array(), '"%foo%" == "bar"'
+            ], [], '', [], [], '"%foo%" == "bar"'
         ));
 
         $sc = $this->getServiceContainer($routes);
@@ -77,8 +77,8 @@ class RouterTest extends TestCase
 
         $router = new Router($sc, 'foo');
 
-        $this->assertSame('/en', $router->generate('foo', array('_locale' => 'en')));
-        $this->assertSame('/', $router->generate('foo', array('_locale' => 'es')));
+        $this->assertSame('/en', $router->generate('foo', ['_locale' => 'en']));
+        $this->assertSame('/', $router->generate('foo', ['_locale' => 'es']));
         $this->assertSame('"bar" == "bar"', $router->getRouteCollection()->get('foo')->getCondition());
     }
 
@@ -88,37 +88,37 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             '/foo',
-            array(
+            [
                 'foo' => 'before_%parameter.foo%',
                 'bar' => '%parameter.bar%_after',
                 'baz' => '%%escaped%%',
-                'boo' => array('%parameter%', '%%escaped_parameter%%', array('%bee_parameter%', 'bee')),
-                'bee' => array('bee', 'bee'),
-            ),
-            array(
-            )
+                'boo' => ['%parameter%', '%%escaped_parameter%%', ['%bee_parameter%', 'bee']],
+                'bee' => ['bee', 'bee'],
+            ],
+            [
+            ]
         ));
 
         $sc = $this->getPsr11ServiceContainer($routes);
 
-        $parameters = $this->getParameterBag(array(
+        $parameters = $this->getParameterBag([
             'parameter.foo' => 'foo',
             'parameter.bar' => 'bar',
             'parameter' => 'boo',
             'bee_parameter' => 'foo_bee',
-        ));
+        ]);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'before_foo',
                 'bar' => 'bar_after',
                 'baz' => '%escaped%',
-                'boo' => array('boo', '%escaped_parameter%', array('foo_bee', 'bee')),
-                'bee' => array('bee', 'bee'),
-            ),
+                'boo' => ['boo', '%escaped_parameter%', ['foo_bee', 'bee']],
+                'bee' => ['bee', 'bee'],
+            ],
             $route->getDefaults()
         );
     }
@@ -129,15 +129,15 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             '/foo',
-            array(
+            [
                 'foo' => 'before_%parameter.foo%',
                 'bar' => '%parameter.bar%_after',
                 'baz' => '%%escaped%%',
-                'boo' => array('%parameter%', '%%escaped_parameter%%', array('%bee_parameter%', 'bee')),
-                'bee' => array('bee', 'bee'),
-            ),
-            array(
-            )
+                'boo' => ['%parameter%', '%%escaped_parameter%%', ['%bee_parameter%', 'bee']],
+                'bee' => ['bee', 'bee'],
+            ],
+            [
+            ]
         ));
 
         $sc = $this->getServiceContainer($routes);
@@ -151,13 +151,13 @@ class RouterTest extends TestCase
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'before_foo',
                 'bar' => 'bar_after',
                 'baz' => '%escaped%',
-                'boo' => array('boo', '%escaped_parameter%', array('foo_bee', 'bee')),
-                'bee' => array('bee', 'bee'),
-            ),
+                'boo' => ['boo', '%escaped_parameter%', ['foo_bee', 'bee']],
+                'bee' => ['bee', 'bee'],
+            ],
             $route->getDefaults()
         );
     }
@@ -168,31 +168,31 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             '/foo',
-            array(
-            ),
-            array(
+            [
+            ],
+            [
                 'foo' => 'before_%parameter.foo%',
                 'bar' => '%parameter.bar%_after',
                 'baz' => '%%escaped%%',
-            )
+            ]
         ));
 
         $sc = $this->getPsr11ServiceContainer($routes);
-        $parameters = $this->getParameterBag(array(
+        $parameters = $this->getParameterBag([
             'parameter.foo' => 'foo',
             'parameter.bar' => 'bar',
-        ));
+        ]);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
 
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'before_foo',
                 'bar' => 'bar_after',
                 'baz' => '%escaped%',
-            ),
+            ],
             $route->getRequirements()
         );
     }
@@ -203,13 +203,13 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route(
             '/foo',
-            array(
-            ),
-            array(
+            [
+            ],
+            [
                 'foo' => 'before_%parameter.foo%',
                 'bar' => '%parameter.bar%_after',
                 'baz' => '%%escaped%%',
-            )
+            ]
         ));
 
         $sc = $this->getServiceContainer($routes);
@@ -220,11 +220,11 @@ class RouterTest extends TestCase
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'before_foo',
                 'bar' => 'bar_after',
                 'baz' => '%escaped%',
-            ),
+            ],
             $route->getRequirements()
         );
     }
@@ -236,9 +236,9 @@ class RouterTest extends TestCase
         $routes->add('foo', new Route('/before/%parameter.foo%/after/%%escaped%%'));
 
         $sc = $this->getPsr11ServiceContainer($routes);
-        $parameters = $this->getParameterBag(array('parameter.foo' => 'foo'));
+        $parameters = $this->getParameterBag(['parameter.foo' => 'foo']);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
@@ -275,7 +275,7 @@ class RouterTest extends TestCase
 
         $routes->add('foo', new Route('/%env(FOO)%'));
 
-        $router = new Router($this->getPsr11ServiceContainer($routes), 'foo', array(), null, $this->getParameterBag());
+        $router = new Router($this->getPsr11ServiceContainer($routes), 'foo', [], null, $this->getParameterBag());
         $router->getRouteCollection();
     }
 
@@ -303,9 +303,9 @@ class RouterTest extends TestCase
         $routes->add('foo', $route);
 
         $sc = $this->getPsr11ServiceContainer($routes);
-        $parameters = $this->getParameterBag(array('parameter.foo' => 'foo'));
+        $parameters = $this->getParameterBag(['parameter.foo' => 'foo']);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
         $route = $router->getRouteCollection()->get('foo');
 
         $this->assertEquals(
@@ -362,9 +362,9 @@ class RouterTest extends TestCase
         $routes->add('foo', new Route('/%object%'));
 
         $sc = $this->getPsr11ServiceContainer($routes);
-        $parameters = $this->getParameterBag(array('object' => new \stdClass()));
+        $parameters = $this->getParameterBag(['object' => new \stdClass()]);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
         $router->getRouteCollection()->get('foo');
     }
 
@@ -391,11 +391,11 @@ class RouterTest extends TestCase
     public function testDefaultValuesAsNonStrings($value)
     {
         $routes = new RouteCollection();
-        $routes->add('foo', new Route('foo', array('foo' => $value), array('foo' => '\d+')));
+        $routes->add('foo', new Route('foo', ['foo' => $value], ['foo' => '\d+']));
 
         $sc = $this->getPsr11ServiceContainer($routes);
 
-        $router = new Router($sc, 'foo', array(), null, $this->getParameterBag());
+        $router = new Router($sc, 'foo', [], null, $this->getParameterBag());
 
         $route = $router->getRouteCollection()->get('foo');
 
@@ -408,7 +408,7 @@ class RouterTest extends TestCase
     public function testDefaultValuesAsNonStringsWithSfContainer($value)
     {
         $routes = new RouteCollection();
-        $routes->add('foo', new Route('foo', array('foo' => $value), array('foo' => '\d+')));
+        $routes->add('foo', new Route('foo', ['foo' => $value], ['foo' => '\d+']));
 
         $sc = $this->getServiceContainer($routes);
 
@@ -425,9 +425,9 @@ class RouterTest extends TestCase
         $routeCollection->add('foo', new Route('/%locale%'));
 
         $sc = $this->getPsr11ServiceContainer($routeCollection);
-        $parameters = $this->getParameterBag(array('locale' => 'en'));
+        $parameters = $this->getParameterBag(['locale' => 'en']);
 
-        $router = new Router($sc, 'foo', array(), null, $parameters);
+        $router = new Router($sc, 'foo', [], null, $parameters);
 
         $router->getRouteCollection();
     }
@@ -444,12 +444,12 @@ class RouterTest extends TestCase
 
         $routeCollection = $router->getRouteCollection();
 
-        $this->assertEquals(array(new ContainerParametersResource(array('locale' => 'en'))), $routeCollection->getResources());
+        $this->assertEquals([new ContainerParametersResource(['locale' => 'en'])], $routeCollection->getResources());
     }
 
     public function getNonStringValues()
     {
-        return array(array(null), array(false), array(true), array(new \stdClass()), array(array('foo', 'bar')), array(array(array())));
+        return [[null], [false], [true], [new \stdClass()], [['foo', 'bar']], [[[]]]];
     }
 
     /**
@@ -465,7 +465,7 @@ class RouterTest extends TestCase
             ->will($this->returnValue($routes))
         ;
 
-        $sc = $this->getMockBuilder('Symfony\\Component\\DependencyInjection\\Container')->setMethods(array('get'))->getMock();
+        $sc = $this->getMockBuilder('Symfony\\Component\\DependencyInjection\\Container')->setMethods(['get'])->getMock();
 
         $sc
             ->expects($this->once())
@@ -497,7 +497,7 @@ class RouterTest extends TestCase
         return $sc;
     }
 
-    private function getParameterBag(array $params = array()): ContainerInterface
+    private function getParameterBag(array $params = []): ContainerInterface
     {
         $bag = $this->getMockBuilder(ContainerInterface::class)->getMock();
         $bag
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
index e3ff92b874..73983e47ce 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/DelegatingEngineTest.php
@@ -19,12 +19,12 @@ class DelegatingEngineTest extends TestCase
 {
     public function testSupportsRetrievesEngineFromTheContainer()
     {
-        $container = $this->getContainerMock(array(
+        $container = $this->getContainerMock([
             'engine.first' => $this->getEngineMock('template.php', false),
             'engine.second' => $this->getEngineMock('template.php', true),
-        ));
+        ]);
 
-        $delegatingEngine = new DelegatingEngine($container, array('engine.first', 'engine.second'));
+        $delegatingEngine = new DelegatingEngine($container, ['engine.first', 'engine.second']);
 
         $this->assertTrue($delegatingEngine->supports('template.php'));
     }
@@ -33,12 +33,12 @@ class DelegatingEngineTest extends TestCase
     {
         $firstEngine = $this->getEngineMock('template.php', false);
         $secondEngine = $this->getEngineMock('template.php', true);
-        $container = $this->getContainerMock(array(
+        $container = $this->getContainerMock([
             'engine.first' => $firstEngine,
             'engine.second' => $secondEngine,
-        ));
+        ]);
 
-        $delegatingEngine = new DelegatingEngine($container, array('engine.first', 'engine.second'));
+        $delegatingEngine = new DelegatingEngine($container, ['engine.first', 'engine.second']);
 
         $this->assertSame($secondEngine, $delegatingEngine->getEngine('template.php'));
     }
@@ -51,12 +51,12 @@ class DelegatingEngineTest extends TestCase
     {
         $firstEngine = $this->getEngineMock('template.php', false);
         $secondEngine = $this->getEngineMock('template.php', false);
-        $container = $this->getContainerMock(array(
+        $container = $this->getContainerMock([
             'engine.first' => $firstEngine,
             'engine.second' => $secondEngine,
-        ));
+        ]);
 
-        $delegatingEngine = new DelegatingEngine($container, array('engine.first', 'engine.second'));
+        $delegatingEngine = new DelegatingEngine($container, ['engine.first', 'engine.second']);
         $delegatingEngine->getEngine('template.php');
     }
 
@@ -66,22 +66,22 @@ class DelegatingEngineTest extends TestCase
         $engine = $this->getFrameworkEngineMock('template.php', true);
         $engine->expects($this->once())
             ->method('renderResponse')
-            ->with('template.php', array('foo' => 'bar'))
+            ->with('template.php', ['foo' => 'bar'])
             ->will($this->returnValue($response));
-        $container = $this->getContainerMock(array('engine' => $engine));
+        $container = $this->getContainerMock(['engine' => $engine]);
 
-        $delegatingEngine = new DelegatingEngine($container, array('engine'));
+        $delegatingEngine = new DelegatingEngine($container, ['engine']);
 
-        $this->assertSame($response, $delegatingEngine->renderResponse('template.php', array('foo' => 'bar')));
+        $this->assertSame($response, $delegatingEngine->renderResponse('template.php', ['foo' => 'bar']));
     }
 
     public function testRenderResponseWithTemplatingEngine()
     {
         $engine = $this->getEngineMock('template.php', true);
-        $container = $this->getContainerMock(array('engine' => $engine));
-        $delegatingEngine = new DelegatingEngine($container, array('engine'));
+        $container = $this->getContainerMock(['engine' => $engine]);
+        $delegatingEngine = new DelegatingEngine($container, ['engine']);
 
-        $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $delegatingEngine->renderResponse('template.php', array('foo' => 'bar')));
+        $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $delegatingEngine->renderResponse('template.php', ['foo' => 'bar']));
     }
 
     private function getEngineMock($template, $supports)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/GlobalVariablesTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/GlobalVariablesTest.php
index 348820b321..d6c6b299eb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/GlobalVariablesTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/GlobalVariablesTest.php
@@ -93,14 +93,14 @@ class GlobalVariablesTest extends TestCase
         $std = new \stdClass();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
-        return array(
-            array($user, $user),
-            array($std, $std),
-            array($token, $token),
-            array('Anon.', null),
-            array(null, null),
-            array(10, null),
-            array(true, null),
-        );
+        return [
+            [$user, $user],
+            [$std, $std],
+            [$token, $token],
+            ['Anon.', null],
+            [null, null],
+            [10, null],
+            [true, null],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
index 01fac959db..83df0640bf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/AssetsHelperTest.php
@@ -26,7 +26,7 @@ class AssetsHelperTest extends TestCase
         $fooPackage = new Package(new StaticVersionStrategy('42', '%s?v=%s'));
         $barPackage = new Package(new StaticVersionStrategy('22', '%s?%s'));
 
-        $packages = new Packages($fooPackage, array('bar' => $barPackage));
+        $packages = new Packages($fooPackage, ['bar' => $barPackage]);
 
         $this->helper = new AssetsHelper($packages);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Fixtures/StubTranslator.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Fixtures/StubTranslator.php
index 377a67d6be..9175b37115 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Fixtures/StubTranslator.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Fixtures/StubTranslator.php
@@ -15,7 +15,7 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class StubTranslator implements TranslatorInterface
 {
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         return '[trans]'.$id.'[/trans]';
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
index b74bc801cd..b00b6a10e5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperDivLayoutTest.php
@@ -35,19 +35,19 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
         $root = realpath(\dirname($reflClass->getFileName()).'/Resources/views');
         $rootTheme = realpath(__DIR__.'/Resources');
         $templateNameParser = new StubTemplateNameParser($root, $rootTheme);
-        $loader = new FilesystemLoader(array());
+        $loader = new FilesystemLoader([]);
 
         $this->engine = new PhpEngine($templateNameParser, $loader);
         $this->engine->addGlobal('global', '');
-        $this->engine->setHelpers(array(
+        $this->engine->setHelpers([
             new TranslatorHelper(new StubTranslator()),
-        ));
+        ]);
 
-        return array_merge(parent::getExtensions(), array(
-            new TemplatingExtension($this->engine, $this->csrfTokenManager, array(
+        return array_merge(parent::getExtensions(), [
+            new TemplatingExtension($this->engine, $this->csrfTokenManager, [
                 'FrameworkBundle:Form',
-            )),
-        ));
+            ]),
+        ]);
     }
 
     protected function tearDown()
@@ -59,10 +59,10 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -71,10 +71,10 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -95,12 +95,12 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -113,12 +113,12 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
         );
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->form($view, $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         return (string) $this->engine->get('form')->label($view, $label, $vars);
     }
@@ -133,27 +133,27 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
         return (string) $this->engine->get('form')->errors($view);
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->widget($view, $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->row($view, $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->rest($view, $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->start($view, $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->end($view, $vars);
     }
@@ -165,15 +165,15 @@ class FormHelperDivLayoutTest extends AbstractDivLayoutTest
 
     public static function themeBlockInheritanceProvider()
     {
-        return array(
-            array(array('TestBundle:Parent')),
-        );
+        return [
+            [['TestBundle:Parent']],
+        ];
     }
 
     public static function themeInheritanceProvider()
     {
-        return array(
-            array(array('TestBundle:Parent'), array('TestBundle:Child')),
-        );
+        return [
+            [['TestBundle:Parent'], ['TestBundle:Child']],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
index 303c927acb..8b1bf4cbdd 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/FormHelperTableLayoutTest.php
@@ -29,10 +29,10 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
 
     public function testStartTagHasNoActionAttributeWhenActionIsEmpty()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -41,10 +41,10 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
 
     public function testStartTagHasActionAttributeWhenActionIsZero()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => '0',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -53,12 +53,12 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
 
     public function testHelpAttr()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-            'help_attr' => array(
+            'help_attr' => [
                 'class' => 'class-test',
-            ),
-        ));
+            ],
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -79,20 +79,20 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
         $root = realpath(\dirname($reflClass->getFileName()).'/Resources/views');
         $rootTheme = realpath(__DIR__.'/Resources');
         $templateNameParser = new StubTemplateNameParser($root, $rootTheme);
-        $loader = new FilesystemLoader(array());
+        $loader = new FilesystemLoader([]);
 
         $this->engine = new PhpEngine($templateNameParser, $loader);
         $this->engine->addGlobal('global', '');
-        $this->engine->setHelpers(array(
+        $this->engine->setHelpers([
             new TranslatorHelper(new StubTranslator()),
-        ));
+        ]);
 
-        return array_merge(parent::getExtensions(), array(
-            new TemplatingExtension($this->engine, $this->csrfTokenManager, array(
+        return array_merge(parent::getExtensions(), [
+            new TemplatingExtension($this->engine, $this->csrfTokenManager, [
                 'FrameworkBundle:Form',
                 'FrameworkBundle:FormTable',
-            )),
-        ));
+            ]),
+        ]);
     }
 
     protected function tearDown()
@@ -102,12 +102,12 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
         parent::tearDown();
     }
 
-    protected function renderForm(FormView $view, array $vars = array())
+    protected function renderForm(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->form($view, $vars);
     }
 
-    protected function renderLabel(FormView $view, $label = null, array $vars = array())
+    protected function renderLabel(FormView $view, $label = null, array $vars = [])
     {
         return (string) $this->engine->get('form')->label($view, $label, $vars);
     }
@@ -122,27 +122,27 @@ class FormHelperTableLayoutTest extends AbstractTableLayoutTest
         return (string) $this->engine->get('form')->errors($view);
     }
 
-    protected function renderWidget(FormView $view, array $vars = array())
+    protected function renderWidget(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->widget($view, $vars);
     }
 
-    protected function renderRow(FormView $view, array $vars = array())
+    protected function renderRow(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->row($view, $vars);
     }
 
-    protected function renderRest(FormView $view, array $vars = array())
+    protected function renderRest(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->rest($view, $vars);
     }
 
-    protected function renderStart(FormView $view, array $vars = array())
+    protected function renderStart(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->start($view, $vars);
     }
 
-    protected function renderEnd(FormView $view, array $vars = array())
+    protected function renderEnd(FormView $view, array $vars = [])
     {
         return (string) $this->engine->get('form')->end($view, $vars);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
index 6795bc1a59..a2068ae757 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/RequestHelperTest.php
@@ -24,7 +24,7 @@ class RequestHelperTest extends TestCase
     {
         $this->requestStack = new RequestStack();
         $request = new Request();
-        $request->initialize(array('foobar' => 'bar'));
+        $request->initialize(['foobar' => 'bar']);
         $this->requestStack->push($request);
     }
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_name_c_entry_label.html.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_name_c_entry_label.html.php
index 05240035c0..4ad7e75ddc 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_name_c_entry_label.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_name_c_entry_label.html.php
@@ -1,2 +1,2 @@
 <?php if (!$label) { $label = $view['form']->humanize($name); } ?>
-<label>Custom name label: <?php echo $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?></label>
+<label>Custom name label: <?php echo $view->escape($view['translator']->trans($label, [], $translation_domain)) ?></label>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_names_entry_label.html.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_names_entry_label.html.php
index e165a429a5..71de9d4631 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_names_entry_label.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/Resources/Custom/_names_entry_label.html.php
@@ -1,4 +1,4 @@
 <?php if (!$label) {
     $label = $view['form']->humanize($name);
 } ?>
-<label>Custom label: <?php echo $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?></label>
+<label>Custom label: <?php echo $view->escape($view['translator']->trans($label, [], $translation_domain)) ?></label>
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
index c0fc0ba0bb..06984095f1 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Helper/SessionHelperTest.php
@@ -47,13 +47,13 @@ class SessionHelperTest extends TestCase
 
         $this->assertTrue($helper->hasFlash('notice'));
 
-        $this->assertEquals(array('bar'), $helper->getFlash('notice'));
+        $this->assertEquals(['bar'], $helper->getFlash('notice'));
     }
 
     public function testGetFlashes()
     {
         $helper = new SessionHelper($this->requestStack);
-        $this->assertEquals(array('notice' => array('bar')), $helper->getFlashes());
+        $this->assertEquals(['notice' => ['bar']], $helper->getFlashes());
     }
 
     public function testGet()
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Loader/TemplateLocatorTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Loader/TemplateLocatorTest.php
index 37ea5b484b..3317b15d90 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Loader/TemplateLocatorTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/Loader/TemplateLocatorTest.php
@@ -90,8 +90,8 @@ class TemplateLocatorTest extends TestCase
     {
         return $this
             ->getMockBuilder('Symfony\Component\Config\FileLocator')
-            ->setMethods(array('locate'))
-            ->setConstructorArgs(array('/path/to/fallback'))
+            ->setMethods(['locate'])
+            ->setConstructorArgs(['/path/to/fallback'])
             ->getMock()
         ;
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateFilenameParserTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateFilenameParserTest.php
index eedbcd27df..3c44612b87 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateFilenameParserTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateFilenameParserTest.php
@@ -45,12 +45,12 @@ class TemplateFilenameParserTest extends TestCase
 
     public function getFilenameToTemplateProvider()
     {
-        return array(
-            array('/path/to/section/name.format.engine', new TemplateReference('', '/path/to/section', 'name', 'format', 'engine')),
-            array('\\path\\to\\section\\name.format.engine', new TemplateReference('', '/path/to/section', 'name', 'format', 'engine')),
-            array('name.format.engine', new TemplateReference('', '', 'name', 'format', 'engine')),
-            array('name.format', false),
-            array('name', false),
-        );
+        return [
+            ['/path/to/section/name.format.engine', new TemplateReference('', '/path/to/section', 'name', 'format', 'engine')],
+            ['\\path\\to\\section\\name.format.engine', new TemplateReference('', '/path/to/section', 'name', 'format', 'engine')],
+            ['name.format.engine', new TemplateReference('', '', 'name', 'format', 'engine')],
+            ['name.format', false],
+            ['name', false],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
index dc9dfd71a5..9b4db5101a 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateNameParserTest.php
@@ -27,7 +27,7 @@ class TemplateNameParserTest extends TestCase
             ->expects($this->any())
             ->method('getBundle')
             ->will($this->returnCallback(function ($bundle) {
-                if (\in_array($bundle, array('SensioFooBundle', 'SensioCmsFooBundle', 'FooBundle'))) {
+                if (\in_array($bundle, ['SensioFooBundle', 'SensioCmsFooBundle', 'FooBundle'])) {
                     return true;
                 }
 
@@ -56,22 +56,22 @@ class TemplateNameParserTest extends TestCase
 
     public function parseProvider()
     {
-        return array(
-            array('FooBundle:Post:index.html.php', 'FooBundle:Post:index.html.php', '@FooBundle/Resources/views/Post/index.html.php', new TemplateReference('FooBundle', 'Post', 'index', 'html', 'php')),
-            array('FooBundle:Post:index.html.twig', 'FooBundle:Post:index.html.twig', '@FooBundle/Resources/views/Post/index.html.twig', new TemplateReference('FooBundle', 'Post', 'index', 'html', 'twig')),
-            array('FooBundle:Post:index.xml.php', 'FooBundle:Post:index.xml.php', '@FooBundle/Resources/views/Post/index.xml.php', new TemplateReference('FooBundle', 'Post', 'index', 'xml', 'php')),
-            array('SensioFooBundle:Post:index.html.php', 'SensioFooBundle:Post:index.html.php', '@SensioFooBundle/Resources/views/Post/index.html.php', new TemplateReference('SensioFooBundle', 'Post', 'index', 'html', 'php')),
-            array('SensioCmsFooBundle:Post:index.html.php', 'SensioCmsFooBundle:Post:index.html.php', '@SensioCmsFooBundle/Resources/views/Post/index.html.php', new TemplateReference('SensioCmsFooBundle', 'Post', 'index', 'html', 'php')),
-            array(':Post:index.html.php', ':Post:index.html.php', 'views/Post/index.html.php', new TemplateReference('', 'Post', 'index', 'html', 'php')),
-            array('::index.html.php', '::index.html.php', 'views/index.html.php', new TemplateReference('', '', 'index', 'html', 'php')),
-            array('index.html.php', '::index.html.php', 'views/index.html.php', new TemplateReference('', '', 'index', 'html', 'php')),
-            array('FooBundle:Post:foo.bar.index.html.php', 'FooBundle:Post:foo.bar.index.html.php', '@FooBundle/Resources/views/Post/foo.bar.index.html.php', new TemplateReference('FooBundle', 'Post', 'foo.bar.index', 'html', 'php')),
-            array('@FooBundle/Resources/views/layout.html.twig', '@FooBundle/Resources/views/layout.html.twig', '@FooBundle/Resources/views/layout.html.twig', new BaseTemplateReference('@FooBundle/Resources/views/layout.html.twig', 'twig')),
-            array('@FooBundle/Foo/layout.html.twig', '@FooBundle/Foo/layout.html.twig', '@FooBundle/Foo/layout.html.twig', new BaseTemplateReference('@FooBundle/Foo/layout.html.twig', 'twig')),
-            array('name.twig', 'name.twig', 'name.twig', new BaseTemplateReference('name.twig', 'twig')),
-            array('name', 'name', 'name', new BaseTemplateReference('name')),
-            array('default/index.html.php', '::default/index.html.php', 'views/default/index.html.php', new TemplateReference(null, null, 'default/index', 'html', 'php')),
-        );
+        return [
+            ['FooBundle:Post:index.html.php', 'FooBundle:Post:index.html.php', '@FooBundle/Resources/views/Post/index.html.php', new TemplateReference('FooBundle', 'Post', 'index', 'html', 'php')],
+            ['FooBundle:Post:index.html.twig', 'FooBundle:Post:index.html.twig', '@FooBundle/Resources/views/Post/index.html.twig', new TemplateReference('FooBundle', 'Post', 'index', 'html', 'twig')],
+            ['FooBundle:Post:index.xml.php', 'FooBundle:Post:index.xml.php', '@FooBundle/Resources/views/Post/index.xml.php', new TemplateReference('FooBundle', 'Post', 'index', 'xml', 'php')],
+            ['SensioFooBundle:Post:index.html.php', 'SensioFooBundle:Post:index.html.php', '@SensioFooBundle/Resources/views/Post/index.html.php', new TemplateReference('SensioFooBundle', 'Post', 'index', 'html', 'php')],
+            ['SensioCmsFooBundle:Post:index.html.php', 'SensioCmsFooBundle:Post:index.html.php', '@SensioCmsFooBundle/Resources/views/Post/index.html.php', new TemplateReference('SensioCmsFooBundle', 'Post', 'index', 'html', 'php')],
+            [':Post:index.html.php', ':Post:index.html.php', 'views/Post/index.html.php', new TemplateReference('', 'Post', 'index', 'html', 'php')],
+            ['::index.html.php', '::index.html.php', 'views/index.html.php', new TemplateReference('', '', 'index', 'html', 'php')],
+            ['index.html.php', '::index.html.php', 'views/index.html.php', new TemplateReference('', '', 'index', 'html', 'php')],
+            ['FooBundle:Post:foo.bar.index.html.php', 'FooBundle:Post:foo.bar.index.html.php', '@FooBundle/Resources/views/Post/foo.bar.index.html.php', new TemplateReference('FooBundle', 'Post', 'foo.bar.index', 'html', 'php')],
+            ['@FooBundle/Resources/views/layout.html.twig', '@FooBundle/Resources/views/layout.html.twig', '@FooBundle/Resources/views/layout.html.twig', new BaseTemplateReference('@FooBundle/Resources/views/layout.html.twig', 'twig')],
+            ['@FooBundle/Foo/layout.html.twig', '@FooBundle/Foo/layout.html.twig', '@FooBundle/Foo/layout.html.twig', new BaseTemplateReference('@FooBundle/Foo/layout.html.twig', 'twig')],
+            ['name.twig', 'name.twig', 'name.twig', new BaseTemplateReference('name.twig', 'twig')],
+            ['name', 'name', 'name', new BaseTemplateReference('name')],
+            ['default/index.html.php', '::default/index.html.php', 'views/default/index.html.php', new TemplateReference(null, null, 'default/index', 'html', 'php')],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateTest.php
index 0321d0532f..66872049ad 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Templating/TemplateTest.php
@@ -26,11 +26,11 @@ class TemplateTest extends TestCase
 
     public function getTemplateToPathProvider()
     {
-        return array(
-            array(new TemplateReference('FooBundle', 'Post', 'index', 'html', 'php'), '@FooBundle/Resources/views/Post/index.html.php'),
-            array(new TemplateReference('FooBundle', '', 'index', 'html', 'twig'), '@FooBundle/Resources/views/index.html.twig'),
-            array(new TemplateReference('', 'Post', 'index', 'html', 'php'), 'views/Post/index.html.php'),
-            array(new TemplateReference('', '', 'index', 'html', 'php'), 'views/index.html.php'),
-        );
+        return [
+            [new TemplateReference('FooBundle', 'Post', 'index', 'html', 'php'), '@FooBundle/Resources/views/Post/index.html.php'],
+            [new TemplateReference('FooBundle', '', 'index', 'html', 'twig'), '@FooBundle/Resources/views/index.html.twig'],
+            [new TemplateReference('', 'Post', 'index', 'html', 'php'), 'views/Post/index.html.php'],
+            [new TemplateReference('', '', 'index', 'html', 'php'), 'views/index.html.php'],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
index 3b97e04c99..6b276ca0b9 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Translation/TranslatorTest.php
@@ -47,15 +47,15 @@ class TranslatorTest extends TestCase
     {
         $translator = $this->getTranslator($this->getLoader());
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('foo (FR)', $translator->trans('foo'));
         $this->assertEquals('bar (EN)', $translator->trans('bar'));
         $this->assertEquals('foobar (ES)', $translator->trans('foobar'));
-        $this->assertEquals('choice 0 (EN)', $translator->trans('choice', array('%count%' => 0)));
+        $this->assertEquals('choice 0 (EN)', $translator->trans('choice', ['%count%' => 0]));
         $this->assertEquals('no translation', $translator->trans('no translation'));
         $this->assertEquals('foobarfoo (PT-PT)', $translator->trans('foobarfoo'));
-        $this->assertEquals('other choice 1 (PT-BR)', $translator->trans('other choice', array('%count%' => 1)));
+        $this->assertEquals('other choice 1 (PT-BR)', $translator->trans('other choice', ['%count%' => 1]));
         $this->assertEquals('foobarbaz (fr.UTF-8)', $translator->trans('foobarbaz'));
         $this->assertEquals('foobarbax (sr@latin)', $translator->trans('foobarbax'));
     }
@@ -67,7 +67,7 @@ class TranslatorTest extends TestCase
     {
         $translator = $this->getTranslator($this->getLoader());
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('choice 0 (EN)', $translator->transChoice('choice', 0));
         $this->assertEquals('other choice 1 (PT-BR)', $translator->transChoice('other choice', 1));
@@ -76,17 +76,17 @@ class TranslatorTest extends TestCase
     public function testTransWithCaching()
     {
         // prime the cache
-        $translator = $this->getTranslator($this->getLoader(), array('cache_dir' => $this->tmpDir));
+        $translator = $this->getTranslator($this->getLoader(), ['cache_dir' => $this->tmpDir]);
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('foo (FR)', $translator->trans('foo'));
         $this->assertEquals('bar (EN)', $translator->trans('bar'));
         $this->assertEquals('foobar (ES)', $translator->trans('foobar'));
-        $this->assertEquals('choice 0 (EN)', $translator->trans('choice', array('%count%' => 0)));
+        $this->assertEquals('choice 0 (EN)', $translator->trans('choice', ['%count%' => 0]));
         $this->assertEquals('no translation', $translator->trans('no translation'));
         $this->assertEquals('foobarfoo (PT-PT)', $translator->trans('foobarfoo'));
-        $this->assertEquals('other choice 1 (PT-BR)', $translator->trans('other choice', array('%count%' => 1)));
+        $this->assertEquals('other choice 1 (PT-BR)', $translator->trans('other choice', ['%count%' => 1]));
         $this->assertEquals('foobarbaz (fr.UTF-8)', $translator->trans('foobarbaz'));
         $this->assertEquals('foobarbax (sr@latin)', $translator->trans('foobarbax'));
 
@@ -94,9 +94,9 @@ class TranslatorTest extends TestCase
         $loader = $this->getMockBuilder('Symfony\Component\Translation\Loader\LoaderInterface')->getMock();
         $loader->expects($this->never())->method('load');
 
-        $translator = $this->getTranslator($loader, array('cache_dir' => $this->tmpDir));
+        $translator = $this->getTranslator($loader, ['cache_dir' => $this->tmpDir]);
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('foo (FR)', $translator->trans('foo'));
         $this->assertEquals('bar (EN)', $translator->trans('bar'));
@@ -113,9 +113,9 @@ class TranslatorTest extends TestCase
     public function testTransChoiceWithCaching()
     {
         // prime the cache
-        $translator = $this->getTranslator($this->getLoader(), array('cache_dir' => $this->tmpDir));
+        $translator = $this->getTranslator($this->getLoader(), ['cache_dir' => $this->tmpDir]);
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('choice 0 (EN)', $translator->transChoice('choice', 0));
         $this->assertEquals('other choice 1 (PT-BR)', $translator->transChoice('other choice', 1));
@@ -124,9 +124,9 @@ class TranslatorTest extends TestCase
         $loader = $this->getMockBuilder('Symfony\Component\Translation\Loader\LoaderInterface')->getMock();
         $loader->expects($this->never())->method('load');
 
-        $translator = $this->getTranslator($loader, array('cache_dir' => $this->tmpDir));
+        $translator = $this->getTranslator($loader, ['cache_dir' => $this->tmpDir]);
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin'));
+        $translator->setFallbackLocales(['en', 'es', 'pt-PT', 'pt_BR', 'fr.UTF-8', 'sr@latin']);
 
         $this->assertEquals('choice 0 (EN)', $translator->transChoice('choice', 0));
         $this->assertEquals('other choice 1 (PT-BR)', $translator->transChoice('other choice', 1));
@@ -139,7 +139,7 @@ class TranslatorTest extends TestCase
     public function testTransWithCachingWithInvalidLocale()
     {
         $loader = $this->getMockBuilder('Symfony\Component\Translation\Loader\LoaderInterface')->getMock();
-        $translator = $this->getTranslator($loader, array('cache_dir' => $this->tmpDir), 'loader', '\Symfony\Bundle\FrameworkBundle\Tests\Translation\TranslatorWithInvalidLocale');
+        $translator = $this->getTranslator($loader, ['cache_dir' => $this->tmpDir], 'loader', '\Symfony\Bundle\FrameworkBundle\Tests\Translation\TranslatorWithInvalidLocale');
 
         $translator->trans('foo');
     }
@@ -147,13 +147,13 @@ class TranslatorTest extends TestCase
     public function testLoadResourcesWithoutCaching()
     {
         $loader = new \Symfony\Component\Translation\Loader\YamlFileLoader();
-        $resourceFiles = array(
-            'fr' => array(
+        $resourceFiles = [
+            'fr' => [
                 __DIR__.'/../Fixtures/Resources/translations/messages.fr.yml',
-            ),
-        );
+            ],
+        ];
 
-        $translator = $this->getTranslator($loader, array('resource_files' => $resourceFiles), 'yml');
+        $translator = $this->getTranslator($loader, ['resource_files' => $resourceFiles], 'yml');
         $translator->setLocale('fr');
 
         $this->assertEquals('répertoire', $translator->trans('folder'));
@@ -175,13 +175,13 @@ class TranslatorTest extends TestCase
     {
         $container = $this->getMockBuilder('Symfony\Component\DependencyInjection\ContainerInterface')->getMock();
 
-        (new Translator($container, new MessageFormatter(), 'en', array(), array('foo' => 'bar')));
+        (new Translator($container, new MessageFormatter(), 'en', [], ['foo' => 'bar']));
     }
 
     /** @dataProvider getDebugModeAndCacheDirCombinations */
     public function testResourceFilesOptionLoadsBeforeOtherAddedResources($debug, $enableCache)
     {
-        $someCatalogue = $this->getCatalogue('some_locale', array());
+        $someCatalogue = $this->getCatalogue('some_locale', []);
 
         $loader = $this->getMockBuilder('Symfony\Component\Translation\Loader\LoaderInterface')->getMock();
 
@@ -197,10 +197,10 @@ class TranslatorTest extends TestCase
             ->with('second_resource.some_locale.loader', 'some_locale', 'messages')
             ->willReturn($someCatalogue);
 
-        $options = array(
-            'resource_files' => array('some_locale' => array('messages.some_locale.loader')),
+        $options = [
+            'resource_files' => ['some_locale' => ['messages.some_locale.loader']],
             'debug' => $debug,
-        );
+        ];
 
         if ($enableCache) {
             $options['cache_dir'] = $this->tmpDir;
@@ -210,20 +210,20 @@ class TranslatorTest extends TestCase
         $translator = $this->createTranslator($loader, $options);
         $translator->addResource('loader', 'second_resource.some_locale.loader', 'some_locale', 'messages');
 
-        $translator->trans('some_message', array(), null, 'some_locale');
+        $translator->trans('some_message', [], null, 'some_locale');
     }
 
     public function getDebugModeAndCacheDirCombinations()
     {
-        return array(
-            array(false, false),
-            array(true, false),
-            array(false, true),
-            array(true, true),
-        );
+        return [
+            [false, false],
+            [true, false],
+            [false, true],
+            [true, true],
+        ];
     }
 
-    protected function getCatalogue($locale, $messages, $resources = array())
+    protected function getCatalogue($locale, $messages, $resources = [])
     {
         $catalogue = new MessageCatalogue($locale);
         foreach ($messages as $key => $translation) {
@@ -242,53 +242,53 @@ class TranslatorTest extends TestCase
         $loader
             ->expects($this->at(0))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('fr', array(
+            ->will($this->returnValue($this->getCatalogue('fr', [
                 'foo' => 'foo (FR)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(1))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('en', array(
+            ->will($this->returnValue($this->getCatalogue('en', [
                 'foo' => 'foo (EN)',
                 'bar' => 'bar (EN)',
                 'choice' => '{0} choice 0 (EN)|{1} choice 1 (EN)|]1,Inf] choice inf (EN)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(2))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('es', array(
+            ->will($this->returnValue($this->getCatalogue('es', [
                 'foobar' => 'foobar (ES)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(3))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('pt-PT', array(
+            ->will($this->returnValue($this->getCatalogue('pt-PT', [
                 'foobarfoo' => 'foobarfoo (PT-PT)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(4))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('pt_BR', array(
+            ->will($this->returnValue($this->getCatalogue('pt_BR', [
                 'other choice' => '{0} other choice 0 (PT-BR)|{1} other choice 1 (PT-BR)|]1,Inf] other choice inf (PT-BR)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(5))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('fr.UTF-8', array(
+            ->will($this->returnValue($this->getCatalogue('fr.UTF-8', [
                 'foobarbaz' => 'foobarbaz (fr.UTF-8)',
-            ))))
+            ])))
         ;
         $loader
             ->expects($this->at(6))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('sr@latin', array(
+            ->will($this->returnValue($this->getCatalogue('sr@latin', [
                 'foobarbax' => 'foobarbax (sr@latin)',
-            ))))
+            ])))
         ;
 
         return $loader;
@@ -306,7 +306,7 @@ class TranslatorTest extends TestCase
         return $container;
     }
 
-    public function getTranslator($loader, $options = array(), $loaderFomat = 'loader', $translatorClass = '\Symfony\Bundle\FrameworkBundle\Translation\Translator', $defaultLocale = 'en')
+    public function getTranslator($loader, $options = [], $loaderFomat = 'loader', $translatorClass = '\Symfony\Bundle\FrameworkBundle\Translation\Translator', $defaultLocale = 'en')
     {
         $translator = $this->createTranslator($loader, $options, $translatorClass, $loaderFomat, $defaultLocale);
 
@@ -326,15 +326,15 @@ class TranslatorTest extends TestCase
     public function testWarmup()
     {
         $loader = new \Symfony\Component\Translation\Loader\YamlFileLoader();
-        $resourceFiles = array(
-            'fr' => array(
+        $resourceFiles = [
+            'fr' => [
                 __DIR__.'/../Fixtures/Resources/translations/messages.fr.yml',
-            ),
-        );
+            ],
+        ];
 
         // prime the cache
-        $translator = $this->getTranslator($loader, array('cache_dir' => $this->tmpDir, 'resource_files' => $resourceFiles), 'yml');
-        $translator->setFallbackLocales(array('fr'));
+        $translator = $this->getTranslator($loader, ['cache_dir' => $this->tmpDir, 'resource_files' => $resourceFiles], 'yml');
+        $translator->setFallbackLocales(['fr']);
         $translator->warmup($this->tmpDir);
 
         $loader = $this->getMockBuilder('Symfony\Component\Translation\Loader\LoaderInterface')->getMock();
@@ -342,9 +342,9 @@ class TranslatorTest extends TestCase
             ->expects($this->never())
             ->method('load');
 
-        $translator = $this->getTranslator($loader, array('cache_dir' => $this->tmpDir, 'resource_files' => $resourceFiles), 'yml');
+        $translator = $this->getTranslator($loader, ['cache_dir' => $this->tmpDir, 'resource_files' => $resourceFiles], 'yml');
         $translator->setLocale('fr');
-        $translator->setFallbackLocales(array('fr'));
+        $translator->setFallbackLocales(['fr']);
         $this->assertEquals('répertoire', $translator->trans('folder'));
     }
 
@@ -354,7 +354,7 @@ class TranslatorTest extends TestCase
             return new $translatorClass(
                 $this->getContainer($loader),
                 new MessageFormatter(),
-                array($loaderFomat => array($loaderFomat)),
+                [$loaderFomat => [$loaderFomat]],
                 $options
             );
         }
@@ -363,7 +363,7 @@ class TranslatorTest extends TestCase
             $this->getContainer($loader),
             new MessageFormatter(),
             $defaultLocale,
-            array($loaderFomat => array($loaderFomat)),
+            [$loaderFomat => [$loaderFomat]],
             $options
         );
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Translation/Translator.php b/src/Symfony/Bundle/FrameworkBundle/Translation/Translator.php
index 198fcd9cb8..e0d0243281 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Translation/Translator.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Translation/Translator.php
@@ -27,11 +27,11 @@ class Translator extends BaseTranslator implements WarmableInterface
     protected $container;
     protected $loaderIds;
 
-    protected $options = array(
+    protected $options = [
         'cache_dir' => null,
         'debug' => false,
-        'resource_files' => array(),
-    );
+        'resource_files' => [],
+    ];
 
     /**
      * @var array
@@ -44,7 +44,7 @@ class Translator extends BaseTranslator implements WarmableInterface
      *
      * @var array
      */
-    private $resources = array();
+    private $resources = [];
 
     private $resourceFiles;
 
@@ -65,7 +65,7 @@ class Translator extends BaseTranslator implements WarmableInterface
      *
      * @throws InvalidArgumentException
      */
-    public function __construct(ContainerInterface $container, MessageFormatterInterface $formatter, string $defaultLocale, array $loaderIds = array(), array $options = array())
+    public function __construct(ContainerInterface $container, MessageFormatterInterface $formatter, string $defaultLocale, array $loaderIds = [], array $options = [])
     {
         $this->container = $container;
         $this->loaderIds = $loaderIds;
@@ -92,7 +92,7 @@ class Translator extends BaseTranslator implements WarmableInterface
             return;
         }
 
-        $locales = array_merge($this->getFallbackLocales(), array($this->getLocale()), $this->resourceLocales);
+        $locales = array_merge($this->getFallbackLocales(), [$this->getLocale()], $this->resourceLocales);
         foreach (array_unique($locales) as $locale) {
             // reset catalogue in case it's already loaded during the dump of the other locales.
             if (isset($this->catalogues[$locale])) {
@@ -108,7 +108,7 @@ class Translator extends BaseTranslator implements WarmableInterface
         if ($this->resourceFiles) {
             $this->addResourceFiles();
         }
-        $this->resources[] = array($format, $resource, $locale, $domain);
+        $this->resources[] = [$format, $resource, $locale, $domain];
     }
 
     /**
@@ -129,7 +129,7 @@ class Translator extends BaseTranslator implements WarmableInterface
             list($format, $resource, $locale, $domain) = $params;
             parent::addResource($format, $resource, $locale, $domain);
         }
-        $this->resources = array();
+        $this->resources = [];
 
         foreach ($this->loaderIds as $id => $aliases) {
             foreach ($aliases as $alias) {
@@ -141,7 +141,7 @@ class Translator extends BaseTranslator implements WarmableInterface
     private function addResourceFiles()
     {
         $filesByLocale = $this->resourceFiles;
-        $this->resourceFiles = array();
+        $this->resourceFiles = [];
 
         foreach ($filesByLocale as $locale => $files) {
             foreach ($files as $key => $file) {
diff --git a/src/Symfony/Bundle/SecurityBundle/CacheWarmer/ExpressionCacheWarmer.php b/src/Symfony/Bundle/SecurityBundle/CacheWarmer/ExpressionCacheWarmer.php
index de5a75b3b0..938b28dcb6 100644
--- a/src/Symfony/Bundle/SecurityBundle/CacheWarmer/ExpressionCacheWarmer.php
+++ b/src/Symfony/Bundle/SecurityBundle/CacheWarmer/ExpressionCacheWarmer.php
@@ -37,7 +37,7 @@ class ExpressionCacheWarmer implements CacheWarmerInterface
     public function warmUp($cacheDir)
     {
         foreach ($this->expressions as $expression) {
-            $this->expressionLanguage->parse($expression, array('token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver'));
+            $this->expressionLanguage->parse($expression, ['token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver']);
         }
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php b/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
index b3dccfd065..15f59f4754 100644
--- a/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
+++ b/src/Symfony/Bundle/SecurityBundle/Command/UserPasswordEncoderCommand.php
@@ -38,7 +38,7 @@ class UserPasswordEncoderCommand extends Command
     private $encoderFactory;
     private $userClasses;
 
-    public function __construct(EncoderFactoryInterface $encoderFactory, array $userClasses = array())
+    public function __construct(EncoderFactoryInterface $encoderFactory, array $userClasses = [])
     {
         $this->encoderFactory = $encoderFactory;
         $this->userClasses = $userClasses;
@@ -146,14 +146,14 @@ EOF
 
         $encodedPassword = $encoder->encodePassword($password, $salt);
 
-        $rows = array(
-            array('Encoder used', \get_class($encoder)),
-            array('Encoded password', $encodedPassword),
-        );
+        $rows = [
+            ['Encoder used', \get_class($encoder)],
+            ['Encoded password', $encodedPassword],
+        ];
         if (!$emptySalt) {
-            $rows[] = array('Generated salt', $salt);
+            $rows[] = ['Generated salt', $salt];
         }
-        $io->table(array('Key', 'Value'), $rows);
+        $io->table(['Key', 'Value'], $rows);
 
         if (!$emptySalt) {
             $errorIo->note(sprintf('Make sure that your salt storage field fits the salt length: %s chars', \strlen($salt)));
diff --git a/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php b/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
index 3cc96e54d7..3e55022f16 100644
--- a/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
+++ b/src/Symfony/Bundle/SecurityBundle/DataCollector/SecurityDataCollector.php
@@ -60,7 +60,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
         if (null === $this->tokenStorage) {
-            $this->data = array(
+            $this->data = [
                 'enabled' => false,
                 'authenticated' => false,
                 'impersonated' => false,
@@ -70,12 +70,12 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
                 'token_class' => null,
                 'logout_url' => null,
                 'user' => '',
-                'roles' => array(),
-                'inherited_roles' => array(),
+                'roles' => [],
+                'inherited_roles' => [],
                 'supports_role_hierarchy' => null !== $this->roleHierarchy,
-            );
+            ];
         } elseif (null === $token = $this->tokenStorage->getToken()) {
-            $this->data = array(
+            $this->data = [
                 'enabled' => true,
                 'authenticated' => false,
                 'impersonated' => false,
@@ -85,12 +85,12 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
                 'token_class' => null,
                 'logout_url' => null,
                 'user' => '',
-                'roles' => array(),
-                'inherited_roles' => array(),
+                'roles' => [],
+                'inherited_roles' => [],
                 'supports_role_hierarchy' => null !== $this->roleHierarchy,
-            );
+            ];
         } else {
-            $inheritedRoles = array();
+            $inheritedRoles = [];
             $assignedRoles = $token->getRoles();
 
             $impersonatorUser = null;
@@ -119,7 +119,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
                 // fail silently when the logout URL cannot be generated
             }
 
-            $this->data = array(
+            $this->data = [
                 'enabled' => true,
                 'authenticated' => $token->isAuthenticated(),
                 'impersonated' => null !== $impersonatorUser,
@@ -132,7 +132,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
                 'roles' => array_map(function (Role $role) { return $role->getRole(); }, $assignedRoles),
                 'inherited_roles' => array_unique(array_map(function (Role $role) { return $role->getRole(); }, $inheritedRoles)),
                 'supports_role_hierarchy' => null !== $this->roleHierarchy,
-            );
+            ];
         }
 
         // collect voters and access decision manager information
@@ -150,24 +150,24 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
             // collect voter details
             $decisionLog = $this->accessDecisionManager->getDecisionLog();
             foreach ($decisionLog as $key => $log) {
-                $decisionLog[$key]['voter_details'] = array();
+                $decisionLog[$key]['voter_details'] = [];
                 foreach ($log['voterDetails'] as $voterDetail) {
                     $voterClass = \get_class($voterDetail['voter']);
                     $classData = $this->hasVarDumper ? new ClassStub($voterClass) : $voterClass;
-                    $decisionLog[$key]['voter_details'][] = array(
+                    $decisionLog[$key]['voter_details'][] = [
                         'class' => $classData,
                         'attributes' => $voterDetail['attributes'], // Only displayed for unanimous strategy
                         'vote' => $voterDetail['vote'],
-                    );
+                    ];
                 }
                 unset($decisionLog[$key]['voterDetails']);
             }
 
             $this->data['access_decision_log'] = $decisionLog;
         } else {
-            $this->data['access_decision_log'] = array();
+            $this->data['access_decision_log'] = [];
             $this->data['voter_strategy'] = 'unknown';
-            $this->data['voters'] = array();
+            $this->data['voters'] = [];
         }
 
         // collect firewall context information
@@ -175,7 +175,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
         if ($this->firewallMap instanceof FirewallMap) {
             $firewallConfig = $this->firewallMap->getFirewallConfig($request);
             if (null !== $firewallConfig) {
-                $this->data['firewall'] = array(
+                $this->data['firewall'] = [
                     'name' => $firewallConfig->getName(),
                     'allows_anonymous' => $firewallConfig->allowsAnonymous(),
                     'request_matcher' => $firewallConfig->getRequestMatcher(),
@@ -188,7 +188,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
                     'access_denied_url' => $firewallConfig->getAccessDeniedUrl(),
                     'user_checker' => $firewallConfig->getUserChecker(),
                     'listeners' => $firewallConfig->getListeners(),
-                );
+                ];
 
                 // generate exit impersonation path from current request
                 if ($this->data['impersonated'] && null !== $switchUserConfig = $firewallConfig->getSwitchUser()) {
@@ -202,7 +202,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
         }
 
         // collect firewall listeners information
-        $this->data['listeners'] = array();
+        $this->data['listeners'] = [];
         if ($this->firewall) {
             $this->data['listeners'] = $this->firewall->getWrappedListeners();
         }
@@ -213,7 +213,7 @@ class SecurityDataCollector extends DataCollector implements LateDataCollectorIn
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
     }
 
     public function lateCollect()
diff --git a/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php b/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
index 3f3d2c9077..135ac29fc7 100644
--- a/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
+++ b/src/Symfony/Bundle/SecurityBundle/Debug/WrappedListener.php
@@ -67,10 +67,10 @@ final class WrappedListener implements ListenerInterface
             $this->stub = self::$hasVarDumper ? new ClassStub(\get_class($this->listener)) : \get_class($this->listener);
         }
 
-        return array(
+        return [
             'response' => $this->response,
             'time' => $this->time,
             'stub' => $this->stub,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
index 8a4bf0c6e6..898402d359 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddExpressionLanguageProvidersPass.php
@@ -30,7 +30,7 @@ class AddExpressionLanguageProvidersPass implements CompilerPassInterface
         if ($container->has('security.expression_language')) {
             $definition = $container->findDefinition('security.expression_language');
             foreach ($container->findTaggedServiceIds('security.expression_language_provider', true) as $id => $attributes) {
-                $definition->addMethodCall('registerProvider', array(new Reference($id)));
+                $definition->addMethodCall('registerProvider', [new Reference($id)]);
             }
         }
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
index 2b76e2883e..87103c37a3 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/AddSecurityVotersPass.php
@@ -44,7 +44,7 @@ class AddSecurityVotersPass implements CompilerPassInterface
         }
 
         $debug = $container->getParameter('kernel.debug');
-        $voterServices = array();
+        $voterServices = [];
         foreach ($voters as $voter) {
             $voterServiceId = (string) $voter;
             $definition = $container->getDefinition($voterServiceId);
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/RegisterCsrfTokenClearingLogoutHandlerPass.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/RegisterCsrfTokenClearingLogoutHandlerPass.php
index d4d28ecc4e..0d7527c26b 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/RegisterCsrfTokenClearingLogoutHandlerPass.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Compiler/RegisterCsrfTokenClearingLogoutHandlerPass.php
@@ -37,6 +37,6 @@ class RegisterCsrfTokenClearingLogoutHandlerPass implements CompilerPassInterfac
             ->addArgument(new Reference('security.csrf.token_storage'))
             ->setPublic(false);
 
-        $container->findDefinition('security.logout_listener')->addMethodCall('addHandler', array(new Reference('security.logout.handler.csrf_token_clearing')));
+        $container->findDefinition('security.logout_listener')->addMethodCall('addHandler', [new Reference('security.logout.handler.csrf_token_clearing')]);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
index b9cd692cf0..c8334313a5 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/MainConfiguration.php
@@ -68,7 +68,7 @@ class MainConfiguration implements ConfigurationInterface
             ->children()
                 ->scalarNode('access_denied_url')->defaultNull()->example('/foo/error403')->end()
                 ->enumNode('session_fixation_strategy')
-                    ->values(array(SessionAuthenticationStrategy::NONE, SessionAuthenticationStrategy::MIGRATE, SessionAuthenticationStrategy::INVALIDATE))
+                    ->values([SessionAuthenticationStrategy::NONE, SessionAuthenticationStrategy::MIGRATE, SessionAuthenticationStrategy::INVALIDATE])
                     ->defaultValue(SessionAuthenticationStrategy::MIGRATE)
                 ->end()
                 ->booleanNode('hide_user_not_found')->defaultTrue()->end()
@@ -78,7 +78,7 @@ class MainConfiguration implements ConfigurationInterface
                     ->addDefaultsIfNotSet()
                     ->children()
                         ->enumNode('strategy')
-                            ->values(array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, AccessDecisionManager::STRATEGY_CONSENSUS, AccessDecisionManager::STRATEGY_UNANIMOUS))
+                            ->values([AccessDecisionManager::STRATEGY_AFFIRMATIVE, AccessDecisionManager::STRATEGY_CONSENSUS, AccessDecisionManager::STRATEGY_UNANIMOUS])
                         ->end()
                         ->scalarNode('service')->end()
                         ->booleanNode('allow_if_all_abstain')->defaultFalse()->end()
@@ -110,7 +110,7 @@ class MainConfiguration implements ConfigurationInterface
                     ->useAttributeAsKey('id')
                     ->prototype('array')
                         ->performNoDeepMerging()
-                        ->beforeNormalization()->ifString()->then(function ($v) { return array('value' => $v); })->end()
+                        ->beforeNormalization()->ifString()->then(function ($v) { return ['value' => $v]; })->end()
                         ->beforeNormalization()
                             ->ifTrue(function ($v) { return \is_array($v) && isset($v['value']); })
                             ->then(function ($v) { return preg_split('/\s*,\s*/', $v['value']); })
@@ -142,7 +142,7 @@ class MainConfiguration implements ConfigurationInterface
                             ->scalarNode('host')->defaultNull()->end()
                             ->integerNode('port')->defaultNull()->end()
                             ->arrayNode('ips')
-                                ->beforeNormalization()->ifString()->then(function ($v) { return array($v); })->end()
+                                ->beforeNormalization()->ifString()->then(function ($v) { return [$v]; })->end()
                                 ->prototype('scalar')->end()
                             ->end()
                             ->arrayNode('methods')
@@ -204,7 +204,7 @@ class MainConfiguration implements ConfigurationInterface
                 ->setDeprecated('The "%path%.%node%" configuration key has been deprecated in Symfony 4.1.')
             ->end()
             ->arrayNode('logout')
-                ->treatTrueLike(array())
+                ->treatTrueLike([])
                 ->canBeUnset()
                 ->children()
                     ->scalarNode('csrf_parameter')->defaultValue('_csrf_token')->end()
@@ -220,7 +220,7 @@ class MainConfiguration implements ConfigurationInterface
                     ->arrayNode('delete_cookies')
                         ->beforeNormalization()
                             ->ifTrue(function ($v) { return \is_array($v) && \is_int(key($v)); })
-                            ->then(function ($v) { return array_map(function ($v) { return array('name' => $v); }, $v); })
+                            ->then(function ($v) { return array_map(function ($v) { return ['name' => $v]; }, $v); })
                         ->end()
                         ->useAttributeAsKey('name')
                         ->prototype('array')
@@ -258,7 +258,7 @@ class MainConfiguration implements ConfigurationInterface
             ->end()
         ;
 
-        $abstractFactoryKeys = array();
+        $abstractFactoryKeys = [];
         foreach ($factories as $factoriesAtPosition) {
             foreach ($factoriesAtPosition as $factory) {
                 $name = str_replace('-', '_', $factory->getKey());
@@ -308,17 +308,17 @@ class MainConfiguration implements ConfigurationInterface
             ->fixXmlConfig('provider')
             ->children()
                 ->arrayNode('providers')
-                    ->example(array(
-                        'my_memory_provider' => array(
-                            'memory' => array(
-                                'users' => array(
-                                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                                    'bar' => array('password' => 'bar', 'roles' => '[ROLE_USER, ROLE_ADMIN]'),
-                                ),
-                            ),
-                        ),
-                        'my_entity_provider' => array('entity' => array('class' => 'SecurityBundle:User', 'property' => 'username')),
-                    ))
+                    ->example([
+                        'my_memory_provider' => [
+                            'memory' => [
+                                'users' => [
+                                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                                    'bar' => ['password' => 'bar', 'roles' => '[ROLE_USER, ROLE_ADMIN]'],
+                                ],
+                            ],
+                        ],
+                        'my_entity_provider' => ['entity' => ['class' => 'SecurityBundle:User', 'property' => 'username']],
+                    ])
                     ->requiresAtLeastOneElement()
                     ->useAttributeAsKey('name')
                     ->prototype('array')
@@ -367,19 +367,19 @@ class MainConfiguration implements ConfigurationInterface
             ->fixXmlConfig('encoder')
             ->children()
                 ->arrayNode('encoders')
-                    ->example(array(
+                    ->example([
                         'App\Entity\User1' => 'bcrypt',
-                        'App\Entity\User2' => array(
+                        'App\Entity\User2' => [
                             'algorithm' => 'bcrypt',
                             'cost' => 13,
-                        ),
-                    ))
+                        ],
+                    ])
                     ->requiresAtLeastOneElement()
                     ->useAttributeAsKey('class')
                     ->prototype('array')
                         ->canBeUnset()
                         ->performNoDeepMerging()
-                        ->beforeNormalization()->ifString()->then(function ($v) { return array('algorithm' => $v); })->end()
+                        ->beforeNormalization()->ifString()->then(function ($v) { return ['algorithm' => $v]; })->end()
                         ->children()
                             ->scalarNode('algorithm')->cannotBeEmpty()->end()
                             ->scalarNode('hash_algorithm')->info('Name of hashing algorithm for PBKDF2 (i.e. sha256, sha512, etc..) See hash_algos() for a list of supported algorithms.')->defaultValue('sha512')->end()
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
index 195ef4c23a..00bb451e0e 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/AbstractFactory.php
@@ -26,26 +26,26 @@ use Symfony\Component\DependencyInjection\Reference;
  */
 abstract class AbstractFactory implements SecurityFactoryInterface
 {
-    protected $options = array(
+    protected $options = [
         'check_path' => '/login_check',
         'use_forward' => false,
         'require_previous_session' => false,
-    );
+    ];
 
-    protected $defaultSuccessHandlerOptions = array(
+    protected $defaultSuccessHandlerOptions = [
         'always_use_default_target_path' => false,
         'default_target_path' => '/',
         'login_path' => '/login',
         'target_path_parameter' => '_target_path',
         'use_referer' => false,
-    );
+    ];
 
-    protected $defaultFailureHandlerOptions = array(
+    protected $defaultFailureHandlerOptions = [
         'failure_path' => null,
         'failure_forward' => false,
         'login_path' => '/login',
         'failure_path_parameter' => '_failure_path',
-    );
+    ];
 
     public function create(ContainerBuilder $container, $id, $config, $userProviderId, $defaultEntryPointId)
     {
@@ -59,14 +59,14 @@ abstract class AbstractFactory implements SecurityFactoryInterface
         if ($this->isRememberMeAware($config)) {
             $container
                 ->getDefinition($listenerId)
-                ->addTag('security.remember_me_aware', array('id' => $id, 'provider' => $userProviderId))
+                ->addTag('security.remember_me_aware', ['id' => $id, 'provider' => $userProviderId])
             ;
         }
 
         // create entry point if applicable (optional)
         $entryPointId = $this->createEntryPoint($container, $id, $config, $defaultEntryPointId);
 
-        return array($authProviderId, $listenerId, $entryPointId);
+        return [$authProviderId, $listenerId, $entryPointId];
     }
 
     public function addConfiguration(NodeDefinition $node)
@@ -178,8 +178,8 @@ abstract class AbstractFactory implements SecurityFactoryInterface
             $successHandler->replaceArgument(2, $id);
         } else {
             $successHandler = $container->setDefinition($successHandlerId, new ChildDefinition('security.authentication.success_handler'));
-            $successHandler->addMethodCall('setOptions', array($options));
-            $successHandler->addMethodCall('setProviderKey', array($id));
+            $successHandler->addMethodCall('setOptions', [$options]);
+            $successHandler->addMethodCall('setProviderKey', [$id]);
         }
 
         return $successHandlerId;
@@ -196,7 +196,7 @@ abstract class AbstractFactory implements SecurityFactoryInterface
             $failureHandler->replaceArgument(1, $options);
         } else {
             $failureHandler = $container->setDefinition($id, new ChildDefinition('security.authentication.failure_handler'));
-            $failureHandler->addMethodCall('setOptions', array($options));
+            $failureHandler->addMethodCall('setOptions', [$options]);
         }
 
         return $id;
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/FormLoginLdapFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/FormLoginLdapFactory.php
index 8bd389dc95..3d9d4b2186 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/FormLoginLdapFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/FormLoginLdapFactory.php
@@ -37,7 +37,7 @@ class FormLoginLdapFactory extends FormLoginFactory
         ;
 
         if (!empty($config['query_string'])) {
-            $definition->addMethodCall('setQueryString', array($config['query_string']));
+            $definition->addMethodCall('setQueryString', [$config['query_string']]);
         }
 
         return $provider;
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
index 03b299e50d..8384c42da7 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/GuardAuthenticationFactory.php
@@ -58,7 +58,7 @@ class GuardAuthenticationFactory implements SecurityFactoryInterface
     public function create(ContainerBuilder $container, $id, $config, $userProvider, $defaultEntryPoint)
     {
         $authenticatorIds = $config['authenticators'];
-        $authenticatorReferences = array();
+        $authenticatorReferences = [];
         foreach ($authenticatorIds as $authenticatorId) {
             $authenticatorReferences[] = new Reference($authenticatorId);
         }
@@ -87,9 +87,9 @@ class GuardAuthenticationFactory implements SecurityFactoryInterface
         // this is always injected - then the listener decides if it should be used
         $container
             ->getDefinition($listenerId)
-            ->addTag('security.remember_me_aware', array('id' => $id, 'provider' => $userProvider));
+            ->addTag('security.remember_me_aware', ['id' => $id, 'provider' => $userProvider]);
 
-        return array($providerId, $listenerId, $entryPointId);
+        return [$providerId, $listenerId, $entryPointId];
     }
 
     private function determineEntryPoint($defaultEntryPointId, array $config)
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicFactory.php
index 7c90ef6205..f3b5bc167e 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicFactory.php
@@ -41,9 +41,9 @@ class HttpBasicFactory implements SecurityFactoryInterface
         $listener = $container->setDefinition($listenerId, new ChildDefinition('security.authentication.listener.basic'));
         $listener->replaceArgument(2, $id);
         $listener->replaceArgument(3, new Reference($entryPointId));
-        $listener->addMethodCall('setSessionAuthenticationStrategy', array(new Reference('security.authentication.session_strategy.'.$id)));
+        $listener->addMethodCall('setSessionAuthenticationStrategy', [new Reference('security.authentication.session_strategy.'.$id)]);
 
-        return array($provider, $listenerId, $entryPointId);
+        return [$provider, $listenerId, $entryPointId];
     }
 
     public function getPosition()
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicLdapFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicLdapFactory.php
index ce3cdda96e..8ae0201568 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicLdapFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/HttpBasicLdapFactory.php
@@ -41,7 +41,7 @@ class HttpBasicLdapFactory extends HttpBasicFactory
         $entryPointId = $this->createEntryPoint($container, $id, $config, $defaultEntryPoint);
 
         if (!empty($config['query_string'])) {
-            $definition->addMethodCall('setQueryString', array($config['query_string']));
+            $definition->addMethodCall('setQueryString', [$config['query_string']]);
         }
 
         // listener
@@ -50,7 +50,7 @@ class HttpBasicLdapFactory extends HttpBasicFactory
         $listener->replaceArgument(2, $id);
         $listener->replaceArgument(3, new Reference($entryPointId));
 
-        return array($provider, $listenerId, $entryPointId);
+        return [$provider, $listenerId, $entryPointId];
     }
 
     public function addConfiguration(NodeDefinition $node)
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
index 6c7adb0323..a660401dbe 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
@@ -26,8 +26,8 @@ class JsonLoginFactory extends AbstractFactory
     {
         $this->addOption('username_path', 'username');
         $this->addOption('password_path', 'password');
-        $this->defaultFailureHandlerOptions = array();
-        $this->defaultSuccessHandlerOptions = array();
+        $this->defaultFailureHandlerOptions = [];
+        $this->defaultSuccessHandlerOptions = [];
     }
 
     /**
@@ -89,7 +89,7 @@ class JsonLoginFactory extends AbstractFactory
         $listener->replaceArgument(4, isset($config['success_handler']) ? new Reference($this->createAuthenticationSuccessHandler($container, $id, $config)) : null);
         $listener->replaceArgument(5, isset($config['failure_handler']) ? new Reference($this->createAuthenticationFailureHandler($container, $id, $config)) : null);
         $listener->replaceArgument(6, array_intersect_key($config, $this->options));
-        $listener->addMethodCall('setSessionAuthenticationStrategy', array(new Reference('security.authentication.session_strategy.'.$id)));
+        $listener->addMethodCall('setSessionAuthenticationStrategy', [new Reference('security.authentication.session_strategy.'.$id)]);
 
         $listenerId .= '.'.$id;
         $container->setDefinition($listenerId, $listener);
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginLdapFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginLdapFactory.php
index df6d4fc2c9..bd0e8115e9 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginLdapFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginLdapFactory.php
@@ -39,7 +39,7 @@ class JsonLoginLdapFactory extends JsonLoginFactory
         ;
 
         if (!empty($config['query_string'])) {
-            $definition->addMethodCall('setQueryString', array($config['query_string']));
+            $definition->addMethodCall('setQueryString', [$config['query_string']]);
         }
 
         return $provider;
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
index b0183c7cff..f7500f05e3 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RememberMeFactory.php
@@ -19,7 +19,7 @@ use Symfony\Component\HttpFoundation\Cookie;
 
 class RememberMeFactory implements SecurityFactoryInterface
 {
-    protected $options = array(
+    protected $options = [
         'name' => 'REMEMBERME',
         'lifetime' => 31536000,
         'path' => '/',
@@ -29,7 +29,7 @@ class RememberMeFactory implements SecurityFactoryInterface
         'samesite' => null,
         'always_remember_me' => false,
         'remember_me_parameter' => '_remember_me',
-    );
+    ];
 
     public function create(ContainerBuilder $container, $id, $config, $userProvider, $defaultEntryPoint)
     {
@@ -54,7 +54,7 @@ class RememberMeFactory implements SecurityFactoryInterface
         if ($container->hasDefinition('security.logout_listener.'.$id)) {
             $container
                 ->getDefinition('security.logout_listener.'.$id)
-                ->addMethodCall('addHandler', array(new Reference($rememberMeServicesId)))
+                ->addMethodCall('addHandler', [new Reference($rememberMeServicesId)])
             ;
         }
 
@@ -63,16 +63,16 @@ class RememberMeFactory implements SecurityFactoryInterface
         $rememberMeServices->replaceArgument(2, $id);
 
         if (isset($config['token_provider'])) {
-            $rememberMeServices->addMethodCall('setTokenProvider', array(
+            $rememberMeServices->addMethodCall('setTokenProvider', [
                 new Reference($config['token_provider']),
-            ));
+            ]);
         }
 
         // remember-me options
         $rememberMeServices->replaceArgument(3, array_intersect_key($config, $this->options));
 
         // attach to remember-me aware listeners
-        $userProviders = array();
+        $userProviders = [];
         foreach ($container->findTaggedServiceIds('security.remember_me_aware') as $serviceId => $attributes) {
             foreach ($attributes as $attribute) {
                 if (!isset($attribute['id']) || $attribute['id'] !== $id) {
@@ -86,12 +86,12 @@ class RememberMeFactory implements SecurityFactoryInterface
                 $userProviders[] = new Reference($attribute['provider']);
                 $container
                     ->getDefinition($serviceId)
-                    ->addMethodCall('setRememberMeServices', array(new Reference($rememberMeServicesId)))
+                    ->addMethodCall('setRememberMeServices', [new Reference($rememberMeServicesId)])
                 ;
             }
         }
         if ($config['user_providers']) {
-            $userProviders = array();
+            $userProviders = [];
             foreach ($config['user_providers'] as $providerName) {
                 $userProviders[] = new Reference('security.user.provider.concrete.'.$providerName);
             }
@@ -108,7 +108,7 @@ class RememberMeFactory implements SecurityFactoryInterface
         $listener->replaceArgument(1, new Reference($rememberMeServicesId));
         $listener->replaceArgument(5, $config['catch_exceptions']);
 
-        return array($authProviderId, $listenerId, $defaultEntryPoint);
+        return [$authProviderId, $listenerId, $defaultEntryPoint];
     }
 
     public function getPosition()
@@ -133,7 +133,7 @@ class RememberMeFactory implements SecurityFactoryInterface
             ->scalarNode('token_provider')->end()
             ->arrayNode('user_providers')
                 ->beforeNormalization()
-                    ->ifString()->then(function ($v) { return array($v); })
+                    ->ifString()->then(function ($v) { return [$v]; })
                 ->end()
                 ->prototype('scalar')->end()
             ->end()
@@ -142,9 +142,9 @@ class RememberMeFactory implements SecurityFactoryInterface
 
         foreach ($this->options as $name => $value) {
             if ('secure' === $name) {
-                $builder->enumNode($name)->values(array(true, false, 'auto'))->defaultValue('auto' === $value ? null : $value);
+                $builder->enumNode($name)->values([true, false, 'auto'])->defaultValue('auto' === $value ? null : $value);
             } elseif ('samesite' === $name) {
-                $builder->enumNode($name)->values(array(null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT))->defaultValue($value);
+                $builder->enumNode($name)->values([null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT])->defaultValue($value);
             } elseif (\is_bool($value)) {
                 $builder->booleanNode($name)->defaultValue($value);
             } else {
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RemoteUserFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RemoteUserFactory.php
index 654816e50e..176f65b135 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RemoteUserFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/RemoteUserFactory.php
@@ -38,9 +38,9 @@ class RemoteUserFactory implements SecurityFactoryInterface
         $listener = $container->setDefinition($listenerId, new ChildDefinition('security.authentication.listener.remote_user'));
         $listener->replaceArgument(2, $id);
         $listener->replaceArgument(3, $config['user']);
-        $listener->addMethodCall('setSessionAuthenticationStrategy', array(new Reference('security.authentication.session_strategy.'.$id)));
+        $listener->addMethodCall('setSessionAuthenticationStrategy', [new Reference('security.authentication.session_strategy.'.$id)]);
 
-        return array($providerId, $listenerId, $defaultEntryPoint);
+        return [$providerId, $listenerId, $defaultEntryPoint];
     }
 
     public function getPosition()
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/SimplePreAuthenticationFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/SimplePreAuthenticationFactory.php
index d0bf2440e6..04c5ce16ae 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/SimplePreAuthenticationFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/SimplePreAuthenticationFactory.php
@@ -66,8 +66,8 @@ class SimplePreAuthenticationFactory implements SecurityFactoryInterface
         $listener = $container->setDefinition($listenerId, new ChildDefinition('security.authentication.listener.simple_preauth'));
         $listener->replaceArgument(2, $id);
         $listener->replaceArgument(3, new Reference($config['authenticator']));
-        $listener->addMethodCall('setSessionAuthenticationStrategy', array(new Reference('security.authentication.session_strategy.'.$id)));
+        $listener->addMethodCall('setSessionAuthenticationStrategy', [new Reference('security.authentication.session_strategy.'.$id)]);
 
-        return array($provider, $listenerId, null);
+        return [$provider, $listenerId, null];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/X509Factory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/X509Factory.php
index 17390f4b82..35879ee495 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/X509Factory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/X509Factory.php
@@ -39,9 +39,9 @@ class X509Factory implements SecurityFactoryInterface
         $listener->replaceArgument(2, $id);
         $listener->replaceArgument(3, $config['user']);
         $listener->replaceArgument(4, $config['credentials']);
-        $listener->addMethodCall('setSessionAuthenticationStrategy', array(new Reference('security.authentication.session_strategy.'.$id)));
+        $listener->addMethodCall('setSessionAuthenticationStrategy', [new Reference('security.authentication.session_strategy.'.$id)]);
 
-        return array($providerId, $listenerId, $defaultEntryPoint);
+        return [$providerId, $listenerId, $defaultEntryPoint];
     }
 
     public function getPosition()
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/UserProvider/InMemoryFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/UserProvider/InMemoryFactory.php
index 6b0800953b..1e76601105 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/UserProvider/InMemoryFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/UserProvider/InMemoryFactory.php
@@ -28,10 +28,10 @@ class InMemoryFactory implements UserProviderFactoryInterface
     {
         $definition = $container->setDefinition($id, new ChildDefinition('security.user.provider.in_memory'));
         $defaultPassword = new Parameter('container.build_id');
-        $users = array();
+        $users = [];
 
         foreach ($config['users'] as $username => $user) {
-            $users[$username] = array('password' => null !== $user['password'] ? (string) $user['password'] : $defaultPassword, 'roles' => $user['roles']);
+            $users[$username] = ['password' => null !== $user['password'] ? (string) $user['password'] : $defaultPassword, 'roles' => $user['roles']];
         }
 
         $definition->addArgument($users);
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
index 69e605acf5..108afc2f7c 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
@@ -41,18 +41,18 @@ use Symfony\Component\Security\Http\Controller\UserValueResolver;
  */
 class SecurityExtension extends Extension implements PrependExtensionInterface
 {
-    private $requestMatchers = array();
-    private $expressions = array();
-    private $contextListeners = array();
-    private $listenerPositions = array('pre_auth', 'form', 'http', 'remember_me');
-    private $factories = array();
-    private $userProviderFactories = array();
-    private $statelessFirewallKeys = array();
+    private $requestMatchers = [];
+    private $expressions = [];
+    private $contextListeners = [];
+    private $listenerPositions = ['pre_auth', 'form', 'http', 'remember_me'];
+    private $factories = [];
+    private $userProviderFactories = [];
+    private $statelessFirewallKeys = [];
 
     public function __construct()
     {
         foreach ($this->listenerPositions as $position) {
-            $this->factories[$position] = array();
+            $this->factories[$position] = [];
         }
     }
 
@@ -183,7 +183,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
             }
 
             $container->getDefinition('security.access_map')
-                      ->addMethodCall('add', array($matcher, $attributes, $access['requires_channel']));
+                      ->addMethodCall('add', [$matcher, $attributes, $access['requires_channel']]);
         }
 
         // allow cache warm-up for expressions
@@ -207,7 +207,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         // make the ContextListener aware of the configured user providers
         $contextListenerDefinition = $container->getDefinition('security.context_listener');
         $arguments = $contextListenerDefinition->getArguments();
-        $userProviders = array();
+        $userProviders = [];
         foreach ($providerIds as $userProviderId) {
             $userProviders[] = new Reference($userProviderId);
         }
@@ -222,7 +222,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
         // load firewall map
         $mapDef = $container->getDefinition('security.firewall.map');
-        $map = $authenticationProviders = $contextRefs = array();
+        $map = $authenticationProviders = $contextRefs = [];
         foreach ($firewalls as $name => $firewall) {
             if (isset($firewall['user_checker']) && 'security.user_checker' !== $firewall['user_checker']) {
                 $customUserChecker = true;
@@ -275,7 +275,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         } elseif (isset($firewall['pattern']) || isset($firewall['host'])) {
             $pattern = isset($firewall['pattern']) ? $firewall['pattern'] : null;
             $host = isset($firewall['host']) ? $firewall['host'] : null;
-            $methods = isset($firewall['methods']) ? $firewall['methods'] : array();
+            $methods = isset($firewall['methods']) ? $firewall['methods'] : [];
             $matcher = $this->createRequestMatcher($container, $pattern, $host, null, $methods);
         }
 
@@ -284,7 +284,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
         // Security disabled?
         if (false === $firewall['security']) {
-            return array($matcher, array(), null, null);
+            return [$matcher, [], null, null];
         }
 
         $config->replaceArgument(4, $firewall['stateless']);
@@ -303,8 +303,8 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         $config->replaceArgument(5, $defaultProvider);
 
         // Register listeners
-        $listeners = array();
-        $listenerKeys = array();
+        $listeners = [];
+        $listenerKeys = [];
 
         // Channel listener
         $listeners[] = new Reference('security.channel_listener');
@@ -328,11 +328,11 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         if (isset($firewall['logout'])) {
             $logoutListenerId = 'security.logout_listener.'.$id;
             $logoutListener = $container->setDefinition($logoutListenerId, new ChildDefinition('security.logout_listener'));
-            $logoutListener->replaceArgument(3, array(
+            $logoutListener->replaceArgument(3, [
                 'csrf_parameter' => $firewall['logout']['csrf_parameter'],
                 'csrf_token_id' => $firewall['logout']['csrf_token_id'],
                 'logout_path' => $firewall['logout']['path'],
-            ));
+            ]);
 
             // add logout success handler
             if (isset($firewall['logout']['success_handler'])) {
@@ -351,7 +351,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
             // add session logout handler
             if (true === $firewall['logout']['invalidate_session'] && false === $firewall['stateless']) {
-                $logoutListener->addMethodCall('addHandler', array(new Reference('security.logout.handler.session')));
+                $logoutListener->addMethodCall('addHandler', [new Reference('security.logout.handler.session')]);
             }
 
             // add cookie logout handler
@@ -360,25 +360,25 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
                 $cookieHandler = $container->setDefinition($cookieHandlerId, new ChildDefinition('security.logout.handler.cookie_clearing'));
                 $cookieHandler->addArgument($firewall['logout']['delete_cookies']);
 
-                $logoutListener->addMethodCall('addHandler', array(new Reference($cookieHandlerId)));
+                $logoutListener->addMethodCall('addHandler', [new Reference($cookieHandlerId)]);
             }
 
             // add custom handlers
             foreach ($firewall['logout']['handlers'] as $handlerId) {
-                $logoutListener->addMethodCall('addHandler', array(new Reference($handlerId)));
+                $logoutListener->addMethodCall('addHandler', [new Reference($handlerId)]);
             }
 
             // register with LogoutUrlGenerator
             $container
                 ->getDefinition('security.logout_url_generator')
-                ->addMethodCall('registerListener', array(
+                ->addMethodCall('registerListener', [
                     $id,
                     $firewall['logout']['path'],
                     $firewall['logout']['csrf_token_id'],
                     $firewall['logout']['csrf_parameter'],
                     isset($firewall['logout']['csrf_token_generator']) ? new Reference($firewall['logout']['csrf_token_generator']) : null,
                     false === $firewall['stateless'] && isset($firewall['context']) ? $firewall['context'] : null,
-                ))
+                ])
             ;
         }
 
@@ -425,7 +425,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         $config->replaceArgument(10, $listenerKeys);
         $config->replaceArgument(11, isset($firewall['switch_user']) ? $firewall['switch_user'] : null);
 
-        return array($matcher, $listeners, $exceptionListener, null !== $logoutListenerId ? new Reference($logoutListenerId) : null);
+        return [$matcher, $listeners, $exceptionListener, null !== $logoutListenerId ? new Reference($logoutListenerId) : null];
     }
 
     private function createContextListener($container, $contextKey)
@@ -443,7 +443,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
     private function createAuthenticationListeners($container, $id, $firewall, &$authenticationProviders, $defaultProvider = null, array $providerIds, $defaultEntryPoint)
     {
-        $listeners = array();
+        $listeners = [];
         $hasListeners = false;
 
         foreach ($this->listenerPositions as $position) {
@@ -505,19 +505,19 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
             throw new InvalidConfigurationException(sprintf('No authentication listener registered for firewall "%s".', $id));
         }
 
-        return array($listeners, $defaultEntryPoint);
+        return [$listeners, $defaultEntryPoint];
     }
 
     private function createEncoders($encoders, ContainerBuilder $container)
     {
-        $encoderMap = array();
+        $encoderMap = [];
         foreach ($encoders as $class => $encoder) {
             $encoderMap[$class] = $this->createEncoder($encoder, $container);
         }
 
         $container
             ->getDefinition('security.encoder_factory.generic')
-            ->setArguments(array($encoderMap))
+            ->setArguments([$encoderMap])
         ;
     }
 
@@ -530,33 +530,33 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
         // plaintext encoder
         if ('plaintext' === $config['algorithm']) {
-            $arguments = array($config['ignore_case']);
+            $arguments = [$config['ignore_case']];
 
-            return array(
+            return [
                 'class' => 'Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder',
                 'arguments' => $arguments,
-            );
+            ];
         }
 
         // pbkdf2 encoder
         if ('pbkdf2' === $config['algorithm']) {
-            return array(
+            return [
                 'class' => 'Symfony\Component\Security\Core\Encoder\Pbkdf2PasswordEncoder',
-                'arguments' => array(
+                'arguments' => [
                     $config['hash_algorithm'],
                     $config['encode_as_base64'],
                     $config['iterations'],
                     $config['key_length'],
-                ),
-            );
+                ],
+            ];
         }
 
         // bcrypt encoder
         if ('bcrypt' === $config['algorithm']) {
-            return array(
+            return [
                 'class' => 'Symfony\Component\Security\Core\Encoder\BCryptPasswordEncoder',
-                'arguments' => array($config['cost']),
-            );
+                'arguments' => [$config['cost']],
+            ];
         }
 
         // Argon2i encoder
@@ -569,14 +569,14 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
                 throw new InvalidConfigurationException('Argon2i algorithm is not supported. Install the libsodium extension or use BCrypt instead.');
             }
 
-            return array(
+            return [
                 'class' => 'Symfony\Component\Security\Core\Encoder\Argon2iPasswordEncoder',
-                'arguments' => array(
+                'arguments' => [
                     $config['memory_cost'],
                     $config['time_cost'],
                     $config['threads'],
-                ),
-            );
+                ],
+            ];
         }
 
         // run-time configured encoder
@@ -586,7 +586,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
     // Parses user providers and returns an array of their ids
     private function createUserProviders($config, ContainerBuilder $container)
     {
-        $providerIds = array();
+        $providerIds = [];
         foreach ($config['providers'] as $name => $provider) {
             $id = $this->createUserDaoProvider($name, $provider, $container);
             $providerIds[str_replace('-', '_', $name)] = $id;
@@ -620,7 +620,7 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
 
         // Chain provider
         if (isset($provider['chain'])) {
-            $providers = array();
+            $providers = [];
             foreach ($provider['chain']['providers'] as $providerName) {
                 $providers[] = new Reference($this->getUserProviderId($providerName));
             }
@@ -697,20 +697,20 @@ class SecurityExtension extends Extension implements PrependExtensionInterface
         return $this->expressions[$id] = new Reference($id);
     }
 
-    private function createRequestMatcher($container, $path = null, $host = null, int $port = null, $methods = array(), $ip = null, array $attributes = array())
+    private function createRequestMatcher($container, $path = null, $host = null, int $port = null, $methods = [], $ip = null, array $attributes = [])
     {
         if ($methods) {
             $methods = array_map('strtoupper', (array) $methods);
         }
 
-        $id = '.security.request_matcher.'.ContainerBuilder::hash(array($path, $host, $port, $methods, $ip, $attributes));
+        $id = '.security.request_matcher.'.ContainerBuilder::hash([$path, $host, $port, $methods, $ip, $attributes]);
 
         if (isset($this->requestMatchers[$id])) {
             return $this->requestMatchers[$id];
         }
 
         // only add arguments that are necessary
-        $arguments = array($path, $host, $methods, $ip, $attributes, null, $port);
+        $arguments = [$path, $host, $methods, $ip, $attributes, null, $port];
         while (\count($arguments) > 0 && !end($arguments)) {
             array_pop($arguments);
         }
diff --git a/src/Symfony/Bundle/SecurityBundle/EventListener/VoteListener.php b/src/Symfony/Bundle/SecurityBundle/EventListener/VoteListener.php
index dd9dddf83b..30956dafcf 100644
--- a/src/Symfony/Bundle/SecurityBundle/EventListener/VoteListener.php
+++ b/src/Symfony/Bundle/SecurityBundle/EventListener/VoteListener.php
@@ -43,6 +43,6 @@ class VoteListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array('debug.security.authorization.vote' => 'onVoterVote');
+        return ['debug.security.authorization.vote' => 'onVoterVote'];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php b/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
index 795f5b3cc0..dca8ccde56 100644
--- a/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
+++ b/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
@@ -29,7 +29,7 @@ final class FirewallConfig
     private $listeners;
     private $switchUser;
 
-    public function __construct(string $name, string $userChecker, string $requestMatcher = null, bool $securityEnabled = true, bool $stateless = false, string $provider = null, string $context = null, string $entryPoint = null, string $accessDeniedHandler = null, string $accessDeniedUrl = null, array $listeners = array(), $switchUser = null)
+    public function __construct(string $name, string $userChecker, string $requestMatcher = null, bool $securityEnabled = true, bool $stateless = false, string $provider = null, string $context = null, string $entryPoint = null, string $accessDeniedHandler = null, string $accessDeniedUrl = null, array $listeners = [], $switchUser = null)
     {
         $this->name = $name;
         $this->userChecker = $userChecker;
diff --git a/src/Symfony/Bundle/SecurityBundle/Security/FirewallMap.php b/src/Symfony/Bundle/SecurityBundle/Security/FirewallMap.php
index 92539413f1..d33cfdc7b1 100644
--- a/src/Symfony/Bundle/SecurityBundle/Security/FirewallMap.php
+++ b/src/Symfony/Bundle/SecurityBundle/Security/FirewallMap.php
@@ -40,10 +40,10 @@ class FirewallMap implements FirewallMapInterface
         $context = $this->getFirewallContext($request);
 
         if (null === $context) {
-            return array(array(), null, null);
+            return [[], null, null];
         }
 
-        return array($context->getListeners(), $context->getExceptionListener(), $context->getLogoutListener());
+        return [$context->getListeners(), $context->getExceptionListener(), $context->getLogoutListener()];
     }
 
     /**
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/CacheWarmer/ExpressionCacheWarmerTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/CacheWarmer/ExpressionCacheWarmerTest.php
index 30ead76927..d1299bffed 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/CacheWarmer/ExpressionCacheWarmerTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/CacheWarmer/ExpressionCacheWarmerTest.php
@@ -20,14 +20,14 @@ class ExpressionCacheWarmerTest extends TestCase
 {
     public function testWarmUp()
     {
-        $expressions = array(new Expression('A'), new Expression('B'));
+        $expressions = [new Expression('A'), new Expression('B')];
 
         $expressionLang = $this->createMock(ExpressionLanguage::class);
         $expressionLang->expects($this->exactly(2))
             ->method('parse')
             ->withConsecutive(
-                array($expressions[0], array('token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver')),
-                array($expressions[1], array('token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver'))
+                [$expressions[0], ['token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver']],
+                [$expressions[1], ['token', 'user', 'object', 'subject', 'roles', 'request', 'trust_resolver']]
             );
 
         (new ExpressionCacheWarmer($expressions, $expressionLang))->warmUp('');
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
index ff89aecfa4..e95b354d99 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DataCollector/SecurityDataCollectorTest.php
@@ -97,12 +97,12 @@ class SecurityDataCollectorTest extends TestCase
 
     public function testCollectImpersonatedToken()
     {
-        $adminToken = new UsernamePasswordToken('yceruto', 'P4$$w0rD', 'provider', array('ROLE_ADMIN'));
+        $adminToken = new UsernamePasswordToken('yceruto', 'P4$$w0rD', 'provider', ['ROLE_ADMIN']);
 
-        $userRoles = array(
+        $userRoles = [
             'ROLE_USER',
             new SwitchUserRole('ROLE_PREVIOUS_ADMIN', $adminToken),
-        );
+        ];
 
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken(new UsernamePasswordToken('hhamon', 'P4$$w0rD', 'provider', $userRoles));
@@ -117,8 +117,8 @@ class SecurityDataCollectorTest extends TestCase
         $this->assertSame('yceruto', $collector->getImpersonatorUser());
         $this->assertSame('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', $collector->getTokenClass()->getValue());
         $this->assertTrue($collector->supportsRoleHierarchy());
-        $this->assertSame(array('ROLE_USER', 'ROLE_PREVIOUS_ADMIN'), $collector->getRoles()->getValue(true));
-        $this->assertSame(array(), $collector->getInheritedRoles()->getValue(true));
+        $this->assertSame(['ROLE_USER', 'ROLE_PREVIOUS_ADMIN'], $collector->getRoles()->getValue(true));
+        $this->assertSame([], $collector->getInheritedRoles()->getValue(true));
         $this->assertSame('hhamon', $collector->getUser());
     }
 
@@ -213,7 +213,7 @@ class SecurityDataCollectorTest extends TestCase
             ->expects($this->once())
             ->method('getListeners')
             ->with($request)
-            ->willReturn(array(array($listener), null, null));
+            ->willReturn([[$listener], null, null]);
 
         $firewall = new TraceableFirewallListener($firewallMap, new EventDispatcher(), new LogoutUrlGenerator());
         $firewall->onKernelRequest($event);
@@ -235,79 +235,79 @@ class SecurityDataCollectorTest extends TestCase
         $decoratedVoter1 = new TraceableVoter($voter1, $eventDispatcher);
         $decoratedVoter2 = new TraceableVoter($voter2, $eventDispatcher);
 
-        yield array(
+        yield [
             AccessDecisionManager::STRATEGY_AFFIRMATIVE,
-            array(array(
-                'attributes' => array('view'),
+            [[
+                'attributes' => ['view'],
                 'object' => new \stdClass(),
                 'result' => true,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                ),
-            )),
-            array($decoratedVoter1, $decoratedVoter1),
-            array(\get_class($voter1), \get_class($voter2)),
-            array(array(
-                'attributes' => array('view'),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                ],
+            ]],
+            [$decoratedVoter1, $decoratedVoter1],
+            [\get_class($voter1), \get_class($voter2)],
+            [[
+                'attributes' => ['view'],
                 'object' => new \stdClass(),
                 'result' => true,
-                'voter_details' => array(
-                    array('class' => \get_class($voter1), 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('class' => \get_class($voter2), 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                ),
-            )),
-        );
+                'voter_details' => [
+                    ['class' => \get_class($voter1), 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['class' => \get_class($voter2), 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                ],
+            ]],
+        ];
 
-        yield array(
+        yield [
             AccessDecisionManager::STRATEGY_UNANIMOUS,
-            array(
-                array(
-                    'attributes' => array('view', 'edit'),
+            [
+                [
+                    'attributes' => ['view', 'edit'],
                     'object' => new \stdClass(),
                     'result' => false,
-                    'voterDetails' => array(
-                        array('voter' => $voter1, 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_DENIED),
-                        array('voter' => $voter1, 'attributes' => array('edit'), 'vote' => VoterInterface::ACCESS_DENIED),
-                        array('voter' => $voter2, 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                        array('voter' => $voter2, 'attributes' => array('edit'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                    ),
-                ),
-                array(
-                    'attributes' => array('update'),
+                    'voterDetails' => [
+                        ['voter' => $voter1, 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_DENIED],
+                        ['voter' => $voter1, 'attributes' => ['edit'], 'vote' => VoterInterface::ACCESS_DENIED],
+                        ['voter' => $voter2, 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                        ['voter' => $voter2, 'attributes' => ['edit'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                    ],
+                ],
+                [
+                    'attributes' => ['update'],
                     'object' => new \stdClass(),
                     'result' => true,
-                    'voterDetails' => array(
-                        array('voter' => $voter1, 'attributes' => array('update'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                        array('voter' => $voter2, 'attributes' => array('update'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                    ),
-                ),
-            ),
-            array($decoratedVoter1, $decoratedVoter1),
-            array(\get_class($voter1), \get_class($voter2)),
-            array(
-                array(
-                    'attributes' => array('view', 'edit'),
+                    'voterDetails' => [
+                        ['voter' => $voter1, 'attributes' => ['update'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                        ['voter' => $voter2, 'attributes' => ['update'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                    ],
+                ],
+            ],
+            [$decoratedVoter1, $decoratedVoter1],
+            [\get_class($voter1), \get_class($voter2)],
+            [
+                [
+                    'attributes' => ['view', 'edit'],
                     'object' => new \stdClass(),
                     'result' => false,
-                    'voter_details' => array(
-                        array('class' => \get_class($voter1), 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_DENIED),
-                        array('class' => \get_class($voter1), 'attributes' => array('edit'), 'vote' => VoterInterface::ACCESS_DENIED),
-                        array('class' => \get_class($voter2), 'attributes' => array('view'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                        array('class' => \get_class($voter2), 'attributes' => array('edit'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                    ),
-                ),
-                array(
-                    'attributes' => array('update'),
+                    'voter_details' => [
+                        ['class' => \get_class($voter1), 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_DENIED],
+                        ['class' => \get_class($voter1), 'attributes' => ['edit'], 'vote' => VoterInterface::ACCESS_DENIED],
+                        ['class' => \get_class($voter2), 'attributes' => ['view'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                        ['class' => \get_class($voter2), 'attributes' => ['edit'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                    ],
+                ],
+                [
+                    'attributes' => ['update'],
                     'object' => new \stdClass(),
                     'result' => true,
-                    'voter_details' => array(
-                        array('class' => \get_class($voter1), 'attributes' => array('update'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                        array('class' => \get_class($voter2), 'attributes' => array('update'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                    ),
-                ),
-            ),
-        );
+                    'voter_details' => [
+                        ['class' => \get_class($voter1), 'attributes' => ['update'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                        ['class' => \get_class($voter2), 'attributes' => ['update'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                    ],
+                ],
+            ],
+        ];
     }
 
     /**
@@ -326,7 +326,7 @@ class SecurityDataCollectorTest extends TestCase
         $accessDecisionManager = $this
             ->getMockBuilder(TraceableAccessDecisionManager::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('getStrategy', 'getVoters', 'getDecisionLog'))
+            ->setMethods(['getStrategy', 'getVoters', 'getDecisionLog'])
             ->getMock();
 
         $accessDecisionManager
@@ -359,43 +359,43 @@ class SecurityDataCollectorTest extends TestCase
 
     public function provideRoles()
     {
-        return array(
+        return [
             // Basic roles
-            array(
-                array('ROLE_USER'),
-                array('ROLE_USER'),
-                array(),
-            ),
-            array(
-                array(new Role('ROLE_USER')),
-                array('ROLE_USER'),
-                array(),
-            ),
+            [
+                ['ROLE_USER'],
+                ['ROLE_USER'],
+                [],
+            ],
+            [
+                [new Role('ROLE_USER')],
+                ['ROLE_USER'],
+                [],
+            ],
             // Inherited roles
-            array(
-                array('ROLE_ADMIN'),
-                array('ROLE_ADMIN'),
-                array('ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'),
-            ),
-            array(
-                array(new Role('ROLE_ADMIN')),
-                array('ROLE_ADMIN'),
-                array('ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'),
-            ),
-            array(
-                array('ROLE_ADMIN', 'ROLE_OPERATOR'),
-                array('ROLE_ADMIN', 'ROLE_OPERATOR'),
-                array('ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'),
-            ),
-        );
+            [
+                ['ROLE_ADMIN'],
+                ['ROLE_ADMIN'],
+                ['ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'],
+            ],
+            [
+                [new Role('ROLE_ADMIN')],
+                ['ROLE_ADMIN'],
+                ['ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'],
+            ],
+            [
+                ['ROLE_ADMIN', 'ROLE_OPERATOR'],
+                ['ROLE_ADMIN', 'ROLE_OPERATOR'],
+                ['ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'],
+            ],
+        ];
     }
 
     private function getRoleHierarchy()
     {
-        return new RoleHierarchy(array(
-            'ROLE_ADMIN' => array('ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'),
-            'ROLE_OPERATOR' => array('ROLE_USER'),
-        ));
+        return new RoleHierarchy([
+            'ROLE_ADMIN' => ['ROLE_USER', 'ROLE_ALLOWED_TO_SWITCH'],
+            'ROLE_OPERATOR' => ['ROLE_USER'],
+        ]);
     }
 
     private function getRequest()
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Debug/TraceableFirewallListenerTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Debug/TraceableFirewallListenerTest.php
index c77ed14dc6..bf5b8c5099 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Debug/TraceableFirewallListenerTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Debug/TraceableFirewallListenerTest.php
@@ -51,7 +51,7 @@ class TraceableFirewallListenerTest extends TestCase
             ->expects($this->once())
             ->method('getListeners')
             ->with($request)
-            ->willReturn(array(array($listener), null, null));
+            ->willReturn([[$listener], null, null]);
 
         $firewall = new TraceableFirewallListener($firewallMap, new EventDispatcher(), new LogoutUrlGenerator());
         $firewall->onKernelRequest($event);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSecurityVotersPassTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSecurityVotersPassTest.php
index 4d26df7d60..93d4121553 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSecurityVotersPassTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSecurityVotersPassTest.php
@@ -30,7 +30,7 @@ class AddSecurityVotersPassTest extends TestCase
         $container = new ContainerBuilder();
         $container
             ->register('security.access.decision_manager', AccessDecisionManager::class)
-            ->addArgument(array())
+            ->addArgument([])
         ;
 
         $compilerPass = new AddSecurityVotersPass();
@@ -44,7 +44,7 @@ class AddSecurityVotersPassTest extends TestCase
 
         $container
             ->register('security.access.decision_manager', AccessDecisionManager::class)
-            ->addArgument(array())
+            ->addArgument([])
         ;
         $container
             ->register('no_prio_service', Voter::class)
@@ -52,15 +52,15 @@ class AddSecurityVotersPassTest extends TestCase
         ;
         $container
             ->register('lowest_prio_service', Voter::class)
-            ->addTag('security.voter', array('priority' => 100))
+            ->addTag('security.voter', ['priority' => 100])
         ;
         $container
             ->register('highest_prio_service', Voter::class)
-            ->addTag('security.voter', array('priority' => 200))
+            ->addTag('security.voter', ['priority' => 200])
         ;
         $container
             ->register('zero_prio_service', Voter::class)
-            ->addTag('security.voter', array('priority' => 0))
+            ->addTag('security.voter', ['priority' => 0])
         ;
         $compilerPass = new AddSecurityVotersPass();
         $compilerPass->process($container);
@@ -86,7 +86,7 @@ class AddSecurityVotersPassTest extends TestCase
 
         $container
             ->register('security.access.decision_manager', AccessDecisionManager::class)
-            ->addArgument(array($voterDef1, $voterDef2));
+            ->addArgument([$voterDef1, $voterDef2]);
         $container->setParameter('kernel.debug', true);
 
         $compilerPass = new AddSecurityVotersPass();
@@ -119,7 +119,7 @@ class AddSecurityVotersPassTest extends TestCase
 
         $container
             ->register('security.access.decision_manager', AccessDecisionManager::class)
-            ->addArgument(array($voterDef1, $voterDef2));
+            ->addArgument([$voterDef1, $voterDef2]);
 
         $compilerPass = new AddSecurityVotersPass();
         $compilerPass->process($container);
@@ -138,7 +138,7 @@ class AddSecurityVotersPassTest extends TestCase
         $container->setParameter('kernel.debug', false);
         $container
             ->register('security.access.decision_manager', AccessDecisionManager::class)
-            ->addArgument(array())
+            ->addArgument([])
         ;
         $container
             ->register('without_interface', 'stdClass')
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSessionDomainConstraintPassTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSessionDomainConstraintPassTest.php
index ba3d555cf6..7dcf7526bd 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSessionDomainConstraintPassTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Compiler/AddSessionDomainConstraintPassTest.php
@@ -22,7 +22,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
 {
     public function testSessionCookie()
     {
-        $container = $this->createContainer(array('cookie_domain' => '.symfony.com.', 'cookie_secure' => true));
+        $container = $this->createContainer(['cookie_domain' => '.symfony.com.', 'cookie_secure' => true]);
 
         $utils = $container->get('security.http_utils');
         $request = Request::create('/', 'get');
@@ -37,7 +37,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
 
     public function testSessionNoDomain()
     {
-        $container = $this->createContainer(array('cookie_secure' => true));
+        $container = $this->createContainer(['cookie_secure' => true]);
 
         $utils = $container->get('security.http_utils');
         $request = Request::create('/', 'get');
@@ -52,7 +52,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
 
     public function testSessionNoSecure()
     {
-        $container = $this->createContainer(array('cookie_domain' => '.symfony.com.'));
+        $container = $this->createContainer(['cookie_domain' => '.symfony.com.']);
 
         $utils = $container->get('security.http_utils');
         $request = Request::create('/', 'get');
@@ -67,7 +67,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
 
     public function testSessionNoSecureAndNoDomain()
     {
-        $container = $this->createContainer(array());
+        $container = $this->createContainer([]);
 
         $utils = $container->get('security.http_utils');
         $request = Request::create('/', 'get');
@@ -98,7 +98,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
 
     public function testSessionAutoSecure()
     {
-        $container = $this->createContainer(array('cookie_domain' => '.symfony.com.', 'cookie_secure' => 'auto'));
+        $container = $this->createContainer(['cookie_domain' => '.symfony.com.', 'cookie_secure' => 'auto']);
 
         $utils = $container->get('security.http_utils');
         $request = Request::create('/', 'get');
@@ -119,7 +119,7 @@ class AddSessionDomainConstraintPassTest extends TestCase
     private function createContainer($sessionStorageOptions)
     {
         $container = new ContainerBuilder();
-        $container->setParameter('kernel.bundles_metadata', array());
+        $container->setParameter('kernel.bundles_metadata', []);
         $container->setParameter('kernel.cache_dir', __DIR__);
         $container->setParameter('kernel.charset', 'UTF-8');
         $container->setParameter('kernel.container_class', 'cc');
@@ -133,15 +133,15 @@ class AddSessionDomainConstraintPassTest extends TestCase
         $container->setParameter('request_listener.http_port', 80);
         $container->setParameter('request_listener.https_port', 443);
 
-        $config = array(
-            'security' => array(
-                'providers' => array('some_provider' => array('id' => 'foo')),
-                'firewalls' => array('some_firewall' => array('security' => false)),
-            ),
-        );
+        $config = [
+            'security' => [
+                'providers' => ['some_provider' => ['id' => 'foo']],
+                'firewalls' => ['some_firewall' => ['security' => false]],
+            ],
+        ];
 
         $ext = new FrameworkExtension();
-        $ext->load(array('framework' => array('csrf_protection' => false, 'router' => array('resource' => 'dummy'))), $container);
+        $ext->load(['framework' => ['csrf_protection' => false, 'router' => ['resource' => 'dummy']]], $container);
 
         $ext = new SecurityExtension();
         $ext->load($config, $container);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
index 01908413bf..c2511ff280 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/CompleteConfigurationTest.php
@@ -29,11 +29,11 @@ abstract class CompleteConfigurationTest extends TestCase
     public function testRolesHierarchy()
     {
         $container = $this->getContainer('container1');
-        $this->assertEquals(array(
-            'ROLE_ADMIN' => array('ROLE_USER'),
-            'ROLE_SUPER_ADMIN' => array('ROLE_USER', 'ROLE_ADMIN', 'ROLE_ALLOWED_TO_SWITCH'),
-            'ROLE_REMOTE' => array('ROLE_USER', 'ROLE_ADMIN'),
-        ), $container->getParameter('security.role_hierarchy.roles'));
+        $this->assertEquals([
+            'ROLE_ADMIN' => ['ROLE_USER'],
+            'ROLE_SUPER_ADMIN' => ['ROLE_USER', 'ROLE_ADMIN', 'ROLE_ALLOWED_TO_SWITCH'],
+            'ROLE_REMOTE' => ['ROLE_USER', 'ROLE_ADMIN'],
+        ], $container->getParameter('security.role_hierarchy.roles'));
     }
 
     public function testUserProviders()
@@ -42,30 +42,30 @@ abstract class CompleteConfigurationTest extends TestCase
 
         $providers = array_values(array_filter($container->getServiceIds(), function ($key) { return 0 === strpos($key, 'security.user.provider.concrete'); }));
 
-        $expectedProviders = array(
+        $expectedProviders = [
             'security.user.provider.concrete.default',
             'security.user.provider.concrete.digest',
             'security.user.provider.concrete.basic',
             'security.user.provider.concrete.service',
             'security.user.provider.concrete.chain',
-        );
+        ];
 
-        $this->assertEquals(array(), array_diff($expectedProviders, $providers));
-        $this->assertEquals(array(), array_diff($providers, $expectedProviders));
+        $this->assertEquals([], array_diff($expectedProviders, $providers));
+        $this->assertEquals([], array_diff($providers, $expectedProviders));
 
         // chain provider
-        $this->assertEquals(array(new IteratorArgument(array(
+        $this->assertEquals([new IteratorArgument([
             new Reference('security.user.provider.concrete.service'),
             new Reference('security.user.provider.concrete.basic'),
-        ))), $container->getDefinition('security.user.provider.concrete.chain')->getArguments());
+        ])], $container->getDefinition('security.user.provider.concrete.chain')->getArguments());
     }
 
     public function testFirewalls()
     {
         $container = $this->getContainer('container1');
         $arguments = $container->getDefinition('security.firewall.map')->getArguments();
-        $listeners = array();
-        $configs = array();
+        $listeners = [];
+        $configs = [];
         foreach (array_keys($arguments[1]->getValues()) as $contextId) {
             $contextDef = $container->getDefinition($contextId);
             $arguments = $contextDef->getArguments();
@@ -80,14 +80,14 @@ abstract class CompleteConfigurationTest extends TestCase
         $configs[0][2] = strtolower($configs[0][2]);
         $configs[2][2] = strtolower($configs[2][2]);
 
-        $this->assertEquals(array(
-            array(
+        $this->assertEquals([
+            [
                 'simple',
                 'security.user_checker',
                 '.security.request_matcher.xmi9dcw',
                 false,
-            ),
-            array(
+            ],
+            [
                 'secure',
                 'security.user_checker',
                 null,
@@ -98,7 +98,7 @@ abstract class CompleteConfigurationTest extends TestCase
                 'security.authentication.form_entry_point.secure',
                 null,
                 null,
-                array(
+                [
                     'switch_user',
                     'x509',
                     'remote_user',
@@ -106,14 +106,14 @@ abstract class CompleteConfigurationTest extends TestCase
                     'http_basic',
                     'remember_me',
                     'anonymous',
-                ),
-                array(
+                ],
+                [
                     'parameter' => '_switch_user',
                     'role' => 'ROLE_ALLOWED_TO_SWITCH',
                     'stateless' => false,
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'host',
                 'security.user_checker',
                 '.security.request_matcher.iw4hyjb',
@@ -124,13 +124,13 @@ abstract class CompleteConfigurationTest extends TestCase
                 'security.authentication.basic_entry_point.host',
                 null,
                 null,
-                array(
+                [
                     'http_basic',
                     'anonymous',
-                ),
+                ],
                 null,
-            ),
-            array(
+            ],
+            [
                 'with_user_checker',
                 'app.user_checker',
                 null,
@@ -141,17 +141,17 @@ abstract class CompleteConfigurationTest extends TestCase
                 'security.authentication.basic_entry_point.with_user_checker',
                 null,
                 null,
-                array(
+                [
                     'http_basic',
                     'anonymous',
-                ),
+                ],
                 null,
-            ),
-        ), $configs);
+            ],
+        ], $configs);
 
-        $this->assertEquals(array(
-            array(),
-            array(
+        $this->assertEquals([
+            [],
+            [
                 'security.channel_listener',
                 'security.authentication.listener.x509.secure',
                 'security.authentication.listener.remote_user.secure',
@@ -161,22 +161,22 @@ abstract class CompleteConfigurationTest extends TestCase
                 'security.authentication.listener.anonymous.secure',
                 'security.authentication.switchuser_listener.secure',
                 'security.access_listener',
-            ),
-            array(
+            ],
+            [
                 'security.channel_listener',
                 'security.context_listener.0',
                 'security.authentication.listener.basic.host',
                 'security.authentication.listener.anonymous.host',
                 'security.access_listener',
-            ),
-            array(
+            ],
+            [
                 'security.channel_listener',
                 'security.context_listener.1',
                 'security.authentication.listener.basic.with_user_checker',
                 'security.authentication.listener.anonymous.with_user_checker',
                 'security.access_listener',
-            ),
-        ), $listeners);
+            ],
+        ], $listeners);
 
         $this->assertFalse($container->hasAlias('Symfony\Component\Security\Core\User\UserCheckerInterface', 'No user checker alias is registered when custom user checker services are registered'));
     }
@@ -186,7 +186,7 @@ abstract class CompleteConfigurationTest extends TestCase
         $container = $this->getContainer('container1');
 
         $arguments = $container->getDefinition('security.firewall.map')->getArguments();
-        $matchers = array();
+        $matchers = [];
 
         foreach ($arguments[1]->getValues() as $reference) {
             if ($reference instanceof Reference) {
@@ -195,16 +195,16 @@ abstract class CompleteConfigurationTest extends TestCase
             }
         }
 
-        $this->assertEquals(array(
-            array(
+        $this->assertEquals([
+            [
                 '/login',
-            ),
-            array(
+            ],
+            [
                 '/test',
                 'foo\\.example\\.org',
-                array('GET', 'POST'),
-            ),
-        ), $matchers);
+                ['GET', 'POST'],
+            ],
+        ], $matchers);
     }
 
     public function testUserCheckerAliasIsRegistered()
@@ -219,14 +219,14 @@ abstract class CompleteConfigurationTest extends TestCase
     {
         $container = $this->getContainer('container1');
 
-        $rules = array();
+        $rules = [];
         foreach ($container->getDefinition('security.access_map')->getMethodCalls() as $call) {
             if ('add' == $call[0]) {
-                $rules[] = array((string) $call[1][0], $call[1][1], $call[1][2]);
+                $rules[] = [(string) $call[1][0], $call[1][1], $call[1][2]];
             }
         }
 
-        $matcherIds = array();
+        $matcherIds = [];
         foreach ($rules as list($matcherId, $attributes, $channel)) {
             $requestMatcher = $container->getDefinition($matcherId);
 
@@ -235,17 +235,17 @@ abstract class CompleteConfigurationTest extends TestCase
 
             $i = \count($matcherIds);
             if (1 === $i) {
-                $this->assertEquals(array('ROLE_USER'), $attributes);
+                $this->assertEquals(['ROLE_USER'], $attributes);
                 $this->assertEquals('https', $channel);
                 $this->assertEquals(
-                    array('/blog/524', null, array('GET', 'POST'), array(), array(), null, 8000),
+                    ['/blog/524', null, ['GET', 'POST'], [], [], null, 8000],
                     $requestMatcher->getArguments()
                 );
             } elseif (2 === $i) {
-                $this->assertEquals(array('IS_AUTHENTICATED_ANONYMOUSLY'), $attributes);
+                $this->assertEquals(['IS_AUTHENTICATED_ANONYMOUSLY'], $attributes);
                 $this->assertNull($channel);
                 $this->assertEquals(
-                    array('/blog/.*'),
+                    ['/blog/.*'],
                     $requestMatcher->getArguments()
                 );
             } elseif (3 === $i) {
@@ -260,22 +260,22 @@ abstract class CompleteConfigurationTest extends TestCase
     {
         $container = $this->getContainer('merge');
 
-        $this->assertEquals(array(
-            'FOO' => array('MOO'),
-            'ADMIN' => array('USER'),
-        ), $container->getParameter('security.role_hierarchy.roles'));
+        $this->assertEquals([
+            'FOO' => ['MOO'],
+            'ADMIN' => ['USER'],
+        ], $container->getParameter('security.role_hierarchy.roles'));
     }
 
     public function testEncoders()
     {
         $container = $this->getContainer('container1');
 
-        $this->assertEquals(array(array(
-            'JMS\FooBundle\Entity\User1' => array(
+        $this->assertEquals([[
+            'JMS\FooBundle\Entity\User1' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder',
-                'arguments' => array(false),
-            ),
-            'JMS\FooBundle\Entity\User2' => array(
+                'arguments' => [false],
+            ],
+            'JMS\FooBundle\Entity\User2' => [
                 'algorithm' => 'sha1',
                 'encode_as_base64' => false,
                 'iterations' => 5,
@@ -286,8 +286,8 @@ abstract class CompleteConfigurationTest extends TestCase
                 'memory_cost' => null,
                 'time_cost' => null,
                 'threads' => null,
-            ),
-            'JMS\FooBundle\Entity\User3' => array(
+            ],
+            'JMS\FooBundle\Entity\User3' => [
                 'algorithm' => 'md5',
                 'hash_algorithm' => 'sha512',
                 'key_length' => 40,
@@ -298,17 +298,17 @@ abstract class CompleteConfigurationTest extends TestCase
                 'memory_cost' => null,
                 'time_cost' => null,
                 'threads' => null,
-            ),
+            ],
             'JMS\FooBundle\Entity\User4' => new Reference('security.encoder.foo'),
-            'JMS\FooBundle\Entity\User5' => array(
+            'JMS\FooBundle\Entity\User5' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\Pbkdf2PasswordEncoder',
-                'arguments' => array('sha1', false, 5, 30),
-            ),
-            'JMS\FooBundle\Entity\User6' => array(
+                'arguments' => ['sha1', false, 5, 30],
+            ],
+            'JMS\FooBundle\Entity\User6' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\BCryptPasswordEncoder',
-                'arguments' => array(15),
-            ),
-        )), $container->getDefinition('security.encoder_factory.generic')->getArguments());
+                'arguments' => [15],
+            ],
+        ]], $container->getDefinition('security.encoder_factory.generic')->getArguments());
     }
 
     public function testEncodersWithLibsodium()
@@ -319,12 +319,12 @@ abstract class CompleteConfigurationTest extends TestCase
 
         $container = $this->getContainer('argon2i_encoder');
 
-        $this->assertEquals(array(array(
-            'JMS\FooBundle\Entity\User1' => array(
+        $this->assertEquals([[
+            'JMS\FooBundle\Entity\User1' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder',
-                'arguments' => array(false),
-            ),
-            'JMS\FooBundle\Entity\User2' => array(
+                'arguments' => [false],
+            ],
+            'JMS\FooBundle\Entity\User2' => [
                 'algorithm' => 'sha1',
                 'encode_as_base64' => false,
                 'iterations' => 5,
@@ -335,8 +335,8 @@ abstract class CompleteConfigurationTest extends TestCase
                 'memory_cost' => null,
                 'time_cost' => null,
                 'threads' => null,
-            ),
-            'JMS\FooBundle\Entity\User3' => array(
+            ],
+            'JMS\FooBundle\Entity\User3' => [
                 'algorithm' => 'md5',
                 'hash_algorithm' => 'sha512',
                 'key_length' => 40,
@@ -347,21 +347,21 @@ abstract class CompleteConfigurationTest extends TestCase
                 'memory_cost' => null,
                 'time_cost' => null,
                 'threads' => null,
-            ),
+            ],
             'JMS\FooBundle\Entity\User4' => new Reference('security.encoder.foo'),
-            'JMS\FooBundle\Entity\User5' => array(
+            'JMS\FooBundle\Entity\User5' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\Pbkdf2PasswordEncoder',
-                'arguments' => array('sha1', false, 5, 30),
-            ),
-            'JMS\FooBundle\Entity\User6' => array(
+                'arguments' => ['sha1', false, 5, 30],
+            ],
+            'JMS\FooBundle\Entity\User6' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\BCryptPasswordEncoder',
-                'arguments' => array(15),
-            ),
-            'JMS\FooBundle\Entity\User7' => array(
+                'arguments' => [15],
+            ],
+            'JMS\FooBundle\Entity\User7' => [
                 'class' => 'Symfony\Component\Security\Core\Encoder\Argon2iPasswordEncoder',
-                'arguments' => array(256, 1, 2),
-            ),
-        )), $container->getDefinition('security.encoder_factory.generic')->getArguments());
+                'arguments' => [256, 1, 2],
+            ],
+        ]], $container->getDefinition('security.encoder_factory.generic')->getArguments());
     }
 
     public function testRememberMeThrowExceptionsDefault()
@@ -470,8 +470,8 @@ abstract class CompleteConfigurationTest extends TestCase
     {
         $container = $this->getContainer('simple_auth');
         $arguments = $container->getDefinition('security.firewall.map')->getArguments();
-        $listeners = array();
-        $configs = array();
+        $listeners = [];
+        $configs = [];
         foreach (array_keys($arguments[1]->getValues()) as $contextId) {
             $contextDef = $container->getDefinition($contextId);
             $arguments = $contextDef->getArguments();
@@ -481,7 +481,7 @@ abstract class CompleteConfigurationTest extends TestCase
             $configs[] = array_values($configDef->getArguments());
         }
 
-        $this->assertSame(array(array(
+        $this->assertSame([[
             'simple_auth',
             'security.user_checker',
             null,
@@ -492,18 +492,18 @@ abstract class CompleteConfigurationTest extends TestCase
             'security.authentication.form_entry_point.simple_auth',
             null,
             null,
-            array('simple_form', 'anonymous',
-            ),
+            ['simple_form', 'anonymous',
+            ],
             null,
-        )), $configs);
+        ]], $configs);
 
-        $this->assertSame(array(array(
+        $this->assertSame([[
             'security.channel_listener',
             'security.context_listener.0',
             'security.authentication.listener.simple_form.simple_auth',
             'security.authentication.listener.anonymous.simple_auth',
             'security.access_listener',
-        )), $listeners);
+        ]], $listeners);
     }
 
     protected function getContainer($file)
@@ -520,8 +520,8 @@ abstract class CompleteConfigurationTest extends TestCase
         $bundle->build($container); // Attach all default factories
         $this->getLoader($container)->load($file);
 
-        $container->getCompilerPassConfig()->setOptimizationPasses(array());
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
         $container->compile();
 
         return $container;
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_customized_config.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_customized_config.php
index cd3cc12000..1d0a090f3f 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_customized_config.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_customized_config.php
@@ -1,20 +1,20 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'access_decision_manager' => array(
+$container->loadFromExtension('security', [
+    'access_decision_manager' => [
         'allow_if_all_abstain' => true,
         'allow_if_equal_granted_denied' => false,
-    ),
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'simple' => array('pattern' => '/login', 'security' => false),
-    ),
-));
+    ],
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'simple' => ['pattern' => '/login', 'security' => false],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_default_strategy.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_default_strategy.php
index d06fc3e686..1f0adbf301 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_default_strategy.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_default_strategy.php
@@ -1,16 +1,16 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'simple' => array('pattern' => '/login', 'security' => false),
-    ),
-));
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'simple' => ['pattern' => '/login', 'security' => false],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service.php
index 29db539362..8f615904dd 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service.php
@@ -1,19 +1,19 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'access_decision_manager' => array(
+$container->loadFromExtension('security', [
+    'access_decision_manager' => [
         'service' => 'app.access_decision_manager',
-    ),
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'simple' => array('pattern' => '/login', 'security' => false),
-    ),
-));
+    ],
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'simple' => ['pattern' => '/login', 'security' => false],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service_and_strategy.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service_and_strategy.php
index f7175e21f6..bd78bdf24d 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service_and_strategy.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/access_decision_manager_service_and_strategy.php
@@ -1,20 +1,20 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'access_decision_manager' => array(
+$container->loadFromExtension('security', [
+    'access_decision_manager' => [
         'service' => 'app.access_decision_manager',
         'strategy' => 'affirmative',
-    ),
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'simple' => array('pattern' => '/login', 'security' => false),
-    ),
-));
+    ],
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'simple' => ['pattern' => '/login', 'security' => false],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/argon2i_encoder.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/argon2i_encoder.php
index ec40e29de1..88543b7da9 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/argon2i_encoder.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/argon2i_encoder.php
@@ -2,13 +2,13 @@
 
 $this->load('container1.php', $container);
 
-$container->loadFromExtension('security', array(
-    'encoders' => array(
-        'JMS\FooBundle\Entity\User7' => array(
+$container->loadFromExtension('security', [
+    'encoders' => [
+        'JMS\FooBundle\Entity\User7' => [
             'algorithm' => 'argon2i',
             'memory_cost' => 256,
             'time_cost' => 1,
             'threads' => 2,
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/container1.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/container1.php
index c2952a1ad0..f420d4d8af 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/container1.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/container1.php
@@ -1,67 +1,67 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'encoders' => array(
+$container->loadFromExtension('security', [
+    'encoders' => [
         'JMS\FooBundle\Entity\User1' => 'plaintext',
-        'JMS\FooBundle\Entity\User2' => array(
+        'JMS\FooBundle\Entity\User2' => [
             'algorithm' => 'sha1',
             'encode_as_base64' => false,
             'iterations' => 5,
-        ),
-        'JMS\FooBundle\Entity\User3' => array(
+        ],
+        'JMS\FooBundle\Entity\User3' => [
             'algorithm' => 'md5',
-        ),
-        'JMS\FooBundle\Entity\User4' => array(
+        ],
+        'JMS\FooBundle\Entity\User4' => [
             'id' => 'security.encoder.foo',
-        ),
-        'JMS\FooBundle\Entity\User5' => array(
+        ],
+        'JMS\FooBundle\Entity\User5' => [
             'algorithm' => 'pbkdf2',
             'hash_algorithm' => 'sha1',
             'encode_as_base64' => false,
             'iterations' => 5,
             'key_length' => 30,
-        ),
-        'JMS\FooBundle\Entity\User6' => array(
+        ],
+        'JMS\FooBundle\Entity\User6' => [
             'algorithm' => 'bcrypt',
             'cost' => 15,
-        ),
-    ),
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-        'digest' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER, ROLE_ADMIN'),
-                ),
-            ),
-        ),
-        'basic' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => '0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33', 'roles' => 'ROLE_SUPER_ADMIN'),
-                    'bar' => array('password' => '0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33', 'roles' => array('ROLE_USER', 'ROLE_ADMIN')),
-                ),
-            ),
-        ),
-        'service' => array(
+        ],
+    ],
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+        'digest' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER, ROLE_ADMIN'],
+                ],
+            ],
+        ],
+        'basic' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => '0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33', 'roles' => 'ROLE_SUPER_ADMIN'],
+                    'bar' => ['password' => '0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33', 'roles' => ['ROLE_USER', 'ROLE_ADMIN']],
+                ],
+            ],
+        ],
+        'service' => [
             'id' => 'user.manager',
-        ),
-        'chain' => array(
-            'chain' => array(
-                'providers' => array('service', 'basic'),
-            ),
-        ),
-    ),
+        ],
+        'chain' => [
+            'chain' => [
+                'providers' => ['service', 'basic'],
+            ],
+        ],
+    ],
 
-    'firewalls' => array(
-        'simple' => array('provider' => 'default', 'pattern' => '/login', 'security' => false),
-        'secure' => array('stateless' => true,
+    'firewalls' => [
+        'simple' => ['provider' => 'default', 'pattern' => '/login', 'security' => false],
+        'secure' => ['stateless' => true,
             'provider' => 'default',
             'http_basic' => true,
             'form_login' => true,
@@ -70,34 +70,34 @@ $container->loadFromExtension('security', array(
             'x509' => true,
             'remote_user' => true,
             'logout' => true,
-            'remember_me' => array('secret' => 'TheSecret'),
+            'remember_me' => ['secret' => 'TheSecret'],
             'user_checker' => null,
-        ),
-        'host' => array(
+        ],
+        'host' => [
             'provider' => 'default',
             'pattern' => '/test',
             'host' => 'foo\\.example\\.org',
-            'methods' => array('GET', 'POST'),
+            'methods' => ['GET', 'POST'],
             'anonymous' => true,
             'http_basic' => true,
-        ),
-        'with_user_checker' => array(
+        ],
+        'with_user_checker' => [
             'provider' => 'default',
             'user_checker' => 'app.user_checker',
             'anonymous' => true,
             'http_basic' => true,
-        ),
-    ),
+        ],
+    ],
 
-    'access_control' => array(
-        array('path' => '/blog/524', 'role' => 'ROLE_USER', 'requires_channel' => 'https', 'methods' => array('get', 'POST'), 'port' => 8000),
-        array('path' => '/blog/.*', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'),
-        array('path' => '/blog/524', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY', 'allow_if' => "token.getUsername() matches '/^admin/'"),
-    ),
+    'access_control' => [
+        ['path' => '/blog/524', 'role' => 'ROLE_USER', 'requires_channel' => 'https', 'methods' => ['get', 'POST'], 'port' => 8000],
+        ['path' => '/blog/.*', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY'],
+        ['path' => '/blog/524', 'role' => 'IS_AUTHENTICATED_ANONYMOUSLY', 'allow_if' => "token.getUsername() matches '/^admin/'"],
+    ],
 
-    'role_hierarchy' => array(
+    'role_hierarchy' => [
         'ROLE_ADMIN' => 'ROLE_USER',
-        'ROLE_SUPER_ADMIN' => array('ROLE_USER', 'ROLE_ADMIN', 'ROLE_ALLOWED_TO_SWITCH'),
+        'ROLE_SUPER_ADMIN' => ['ROLE_USER', 'ROLE_ADMIN', 'ROLE_ALLOWED_TO_SWITCH'],
         'ROLE_REMOTE' => 'ROLE_USER,ROLE_ADMIN',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_provider.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_provider.php
index ff9d9f6b89..68b8439a7d 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_provider.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_provider.php
@@ -1,24 +1,24 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => $memory = array(
-                'users' => array('foo' => array('password' => 'foo', 'roles' => 'ROLE_USER')),
-            ),
-        ),
-        'with-dash' => array(
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => $memory = [
+                'users' => ['foo' => ['password' => 'foo', 'roles' => 'ROLE_USER']],
+            ],
+        ],
+        'with-dash' => [
             'memory' => $memory,
-        ),
-    ),
-    'firewalls' => array(
-        'main' => array(
+        ],
+    ],
+    'firewalls' => [
+        'main' => [
             'provider' => 'default',
             'form_login' => true,
-        ),
-        'other' => array(
+        ],
+        'other' => [
             'provider' => 'with-dash',
             'form_login' => true,
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_undefined_provider.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_undefined_provider.php
index 78d461efe3..7c811cae1a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_undefined_provider.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/firewall_undefined_provider.php
@@ -1,17 +1,17 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array('foo' => array('password' => 'foo', 'roles' => 'ROLE_USER')),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'main' => array(
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => ['foo' => ['password' => 'foo', 'roles' => 'ROLE_USER']],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'main' => [
             'provider' => 'undefined',
             'form_login' => true,
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_provider.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_provider.php
index d7f1cd6973..0a6a79f5f2 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_provider.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_provider.php
@@ -1,16 +1,16 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array('foo' => array('password' => 'foo', 'roles' => 'ROLE_USER')),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'main' => array(
-            'form_login' => array('provider' => 'default'),
-        ),
-    ),
-));
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => ['foo' => ['password' => 'foo', 'roles' => 'ROLE_USER']],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'main' => [
+            'form_login' => ['provider' => 'default'],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_undefined_provider.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_undefined_provider.php
index da54f025d1..cc0b776e43 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_undefined_provider.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/listener_undefined_provider.php
@@ -1,16 +1,16 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array('foo' => array('password' => 'foo', 'roles' => 'ROLE_USER')),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'main' => array(
-            'form_login' => array('provider' => 'undefined'),
-        ),
-    ),
-));
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => ['foo' => ['password' => 'foo', 'roles' => 'ROLE_USER']],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'main' => [
+            'form_login' => ['provider' => 'undefined'],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge.php
index 50ef504ea4..cc8b15ffdd 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge.php
@@ -2,19 +2,19 @@
 
 $this->load('merge_import.php', $container);
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array('id' => 'foo'),
-    ),
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => ['id' => 'foo'],
+    ],
 
-    'firewalls' => array(
-        'main' => array(
+    'firewalls' => [
+        'main' => [
             'form_login' => false,
             'http_basic' => null,
-        ),
-    ),
+        ],
+    ],
 
-    'role_hierarchy' => array(
-        'FOO' => array('MOO'),
-    ),
-));
+    'role_hierarchy' => [
+        'FOO' => ['MOO'],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge_import.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge_import.php
index 912b9127ef..c85937d6ea 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge_import.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/merge_import.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'firewalls' => array(
-        'main' => array(
-            'form_login' => array(
+$container->loadFromExtension('security', [
+    'firewalls' => [
+        'main' => [
+            'form_login' => [
                 'login_path' => '/login',
-            ),
-        ),
-    ),
-    'role_hierarchy' => array(
+            ],
+        ],
+    ],
+    'role_hierarchy' => [
         'FOO' => 'BAR',
         'ADMIN' => 'USER',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/no_custom_user_checker.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/no_custom_user_checker.php
index 3889752f8f..7565452eb5 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/no_custom_user_checker.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/no_custom_user_checker.php
@@ -1,18 +1,18 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
-    'firewalls' => array(
-        'simple' => array('pattern' => '/login', 'security' => false),
-        'secure' => array(
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
+    'firewalls' => [
+        'simple' => ['pattern' => '/login', 'security' => false],
+        'secure' => [
             'stateless' => true,
             'http_basic' => true,
             'form_login' => true,
@@ -21,8 +21,8 @@ $container->loadFromExtension('security', array(
             'x509' => true,
             'remote_user' => true,
             'logout' => true,
-            'remember_me' => array('secret' => 'TheSecret'),
+            'remember_me' => ['secret' => 'TheSecret'],
             'user_checker' => null,
-        ),
-    ),
-));
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/remember_me_options.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/remember_me_options.php
index e0ca4f6ded..cfbef609a1 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/remember_me_options.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/remember_me_options.php
@@ -1,18 +1,18 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array('id' => 'foo'),
-    ),
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => ['id' => 'foo'],
+    ],
 
-    'firewalls' => array(
-        'main' => array(
+    'firewalls' => [
+        'main' => [
             'form_login' => true,
-            'remember_me' => array(
+            'remember_me' => [
                 'secret' => 'TheSecret',
                 'catch_exceptions' => false,
                 'token_provider' => 'token_provider_id',
-            ),
-        ),
-    ),
-));
+            ],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/simple_auth.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/simple_auth.php
index a125dec6b5..05829defd1 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/simple_auth.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Fixtures/php/simple_auth.php
@@ -1,21 +1,21 @@
 <?php
 
-$container->loadFromExtension('security', array(
-    'providers' => array(
-        'default' => array(
-            'memory' => array(
-                'users' => array(
-                    'foo' => array('password' => 'foo', 'roles' => 'ROLE_USER'),
-                ),
-            ),
-        ),
-    ),
+$container->loadFromExtension('security', [
+    'providers' => [
+        'default' => [
+            'memory' => [
+                'users' => [
+                    'foo' => ['password' => 'foo', 'roles' => 'ROLE_USER'],
+                ],
+            ],
+        ],
+    ],
 
-    'firewalls' => array(
-        'simple_auth' => array(
+    'firewalls' => [
+        'simple_auth' => [
             'provider' => 'default',
             'anonymous' => true,
-            'simple_form' => array('authenticator' => 'simple_authenticator'),
-        ),
-    ),
-));
+            'simple_form' => ['authenticator' => 'simple_authenticator'],
+        ],
+    ],
+]);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
index 24447ee89a..88565a47cd 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/MainConfigurationTest.php
@@ -21,31 +21,31 @@ class MainConfigurationTest extends TestCase
      * The minimal, required config needed to not have any required validation
      * issues.
      */
-    protected static $minimalConfig = array(
-        'providers' => array(
-            'stub' => array(
+    protected static $minimalConfig = [
+        'providers' => [
+            'stub' => [
                 'id' => 'foo',
-            ),
-        ),
-        'firewalls' => array(
-            'stub' => array(),
-        ),
-    );
+            ],
+        ],
+        'firewalls' => [
+            'stub' => [],
+        ],
+    ];
 
     /**
      * @expectedException \Symfony\Component\Config\Definition\Exception\InvalidConfigurationException
      */
     public function testNoConfigForProvider()
     {
-        $config = array(
-            'providers' => array(
-                'stub' => array(),
-            ),
-        );
+        $config = [
+            'providers' => [
+                'stub' => [],
+            ],
+        ];
 
         $processor = new Processor();
-        $configuration = new MainConfiguration(array(), array());
-        $processor->processConfiguration($configuration, array($config));
+        $configuration = new MainConfiguration([], []);
+        $processor->processConfiguration($configuration, [$config]);
     }
 
     /**
@@ -53,37 +53,37 @@ class MainConfigurationTest extends TestCase
      */
     public function testManyConfigForProvider()
     {
-        $config = array(
-            'providers' => array(
-                'stub' => array(
+        $config = [
+            'providers' => [
+                'stub' => [
                     'id' => 'foo',
-                    'chain' => array(),
-                ),
-            ),
-        );
+                    'chain' => [],
+                ],
+            ],
+        ];
 
         $processor = new Processor();
-        $configuration = new MainConfiguration(array(), array());
-        $processor->processConfiguration($configuration, array($config));
+        $configuration = new MainConfiguration([], []);
+        $processor->processConfiguration($configuration, [$config]);
     }
 
     public function testCsrfAliases()
     {
-        $config = array(
-            'firewalls' => array(
-                'stub' => array(
-                    'logout' => array(
+        $config = [
+            'firewalls' => [
+                'stub' => [
+                    'logout' => [
                         'csrf_token_generator' => 'a_token_generator',
                         'csrf_token_id' => 'a_token_id',
-                    ),
-                ),
-            ),
-        );
+                    ],
+                ],
+            ],
+        ];
         $config = array_merge(static::$minimalConfig, $config);
 
         $processor = new Processor();
-        $configuration = new MainConfiguration(array(), array());
-        $processedConfig = $processor->processConfiguration($configuration, array($config));
+        $configuration = new MainConfiguration([], []);
+        $processedConfig = $processor->processConfiguration($configuration, [$config]);
         $this->assertArrayHasKey('csrf_token_generator', $processedConfig['firewalls']['stub']['logout']);
         $this->assertEquals('a_token_generator', $processedConfig['firewalls']['stub']['logout']['csrf_token_generator']);
         $this->assertArrayHasKey('csrf_token_id', $processedConfig['firewalls']['stub']['logout']);
@@ -93,26 +93,26 @@ class MainConfigurationTest extends TestCase
     public function testDefaultUserCheckers()
     {
         $processor = new Processor();
-        $configuration = new MainConfiguration(array(), array());
-        $processedConfig = $processor->processConfiguration($configuration, array(static::$minimalConfig));
+        $configuration = new MainConfiguration([], []);
+        $processedConfig = $processor->processConfiguration($configuration, [static::$minimalConfig]);
 
         $this->assertEquals('security.user_checker', $processedConfig['firewalls']['stub']['user_checker']);
     }
 
     public function testUserCheckers()
     {
-        $config = array(
-            'firewalls' => array(
-                'stub' => array(
+        $config = [
+            'firewalls' => [
+                'stub' => [
                     'user_checker' => 'app.henk_checker',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $config = array_merge(static::$minimalConfig, $config);
 
         $processor = new Processor();
-        $configuration = new MainConfiguration(array(), array());
-        $processedConfig = $processor->processConfiguration($configuration, array($config));
+        $configuration = new MainConfiguration([], []);
+        $processedConfig = $processor->processConfiguration($configuration, [$config]);
 
         $this->assertEquals('app.henk_checker', $processedConfig['firewalls']['stub']['user_checker']);
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
index a367a67682..ca82e805c3 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/AbstractFactoryTest.php
@@ -19,13 +19,13 @@ class AbstractFactoryTest extends TestCase
 {
     public function testCreate()
     {
-        list($container, $authProviderId, $listenerId, $entryPointId) = $this->callFactory('foo', array(
+        list($container, $authProviderId, $listenerId, $entryPointId) = $this->callFactory('foo', [
             'use_forward' => true,
             'failure_path' => '/foo',
             'success_handler' => 'custom_success_handler',
             'failure_handler' => 'custom_failure_handler',
             'remember_me' => true,
-        ), 'user_provider', 'entry_point');
+        ], 'user_provider', 'entry_point');
 
         // auth provider
         $this->assertEquals('auth_provider', $authProviderId);
@@ -34,14 +34,14 @@ class AbstractFactoryTest extends TestCase
         $this->assertEquals('abstract_listener.foo', $listenerId);
         $this->assertTrue($container->hasDefinition('abstract_listener.foo'));
         $definition = $container->getDefinition('abstract_listener.foo');
-        $this->assertEquals(array(
+        $this->assertEquals([
             'index_4' => 'foo',
             'index_5' => new Reference('security.authentication.success_handler.foo.abstract_factory'),
             'index_6' => new Reference('security.authentication.failure_handler.foo.abstract_factory'),
-            'index_7' => array(
+            'index_7' => [
                 'use_forward' => true,
-            ),
-        ), $definition->getArguments());
+            ],
+        ], $definition->getArguments());
 
         // entry point
         $this->assertEquals('entry_point', $entryPointId, '->create() does not change the default entry point.');
@@ -52,10 +52,10 @@ class AbstractFactoryTest extends TestCase
      */
     public function testDefaultFailureHandler($serviceId, $defaultHandlerInjection)
     {
-        $options = array(
+        $options = [
             'remember_me' => true,
             'login_path' => '/bar',
-        );
+        ];
 
         if ($serviceId) {
             $options['failure_handler'] = $serviceId;
@@ -71,7 +71,7 @@ class AbstractFactoryTest extends TestCase
         $methodCalls = $failureHandler->getMethodCalls();
         if ($defaultHandlerInjection) {
             $this->assertEquals('setOptions', $methodCalls[0][0]);
-            $this->assertEquals(array('login_path' => '/bar'), $methodCalls[0][1][0]);
+            $this->assertEquals(['login_path' => '/bar'], $methodCalls[0][1][0]);
         } else {
             $this->assertCount(0, $methodCalls);
         }
@@ -79,10 +79,10 @@ class AbstractFactoryTest extends TestCase
 
     public function getFailureHandlers()
     {
-        return array(
-            array(null, true),
-            array('custom_failure_handler', false),
-        );
+        return [
+            [null, true],
+            ['custom_failure_handler', false],
+        ];
     }
 
     /**
@@ -90,10 +90,10 @@ class AbstractFactoryTest extends TestCase
      */
     public function testDefaultSuccessHandler($serviceId, $defaultHandlerInjection)
     {
-        $options = array(
+        $options = [
             'remember_me' => true,
             'default_target_path' => '/bar',
-        );
+        ];
 
         if ($serviceId) {
             $options['success_handler'] = $serviceId;
@@ -109,9 +109,9 @@ class AbstractFactoryTest extends TestCase
 
         if ($defaultHandlerInjection) {
             $this->assertEquals('setOptions', $methodCalls[0][0]);
-            $this->assertEquals(array('default_target_path' => '/bar'), $methodCalls[0][1][0]);
+            $this->assertEquals(['default_target_path' => '/bar'], $methodCalls[0][1][0]);
             $this->assertEquals('setProviderKey', $methodCalls[1][0]);
-            $this->assertEquals(array('foo'), $methodCalls[1][1]);
+            $this->assertEquals(['foo'], $methodCalls[1][1]);
         } else {
             $this->assertCount(0, $methodCalls);
         }
@@ -119,15 +119,15 @@ class AbstractFactoryTest extends TestCase
 
     public function getSuccessHandlers()
     {
-        return array(
-            array(null, true),
-            array('custom_success_handler', false),
-        );
+        return [
+            [null, true],
+            ['custom_success_handler', false],
+        ];
     }
 
     protected function callFactory($id, $config, $userProviderId, $defaultEntryPointId)
     {
-        $factory = $this->getMockForAbstractClass('Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory\AbstractFactory', array());
+        $factory = $this->getMockForAbstractClass('Symfony\Bundle\SecurityBundle\DependencyInjection\Security\Factory\AbstractFactory', []);
 
         $factory
             ->expects($this->once())
@@ -152,6 +152,6 @@ class AbstractFactoryTest extends TestCase
 
         list($authProviderId, $listenerId, $entryPointId) = $factory->create($container, $id, $config, $userProviderId, $defaultEntryPointId);
 
-        return array($container, $authProviderId, $listenerId, $entryPointId);
+        return [$container, $authProviderId, $listenerId, $entryPointId];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
index 55a3ad387c..81db40412a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/Security/Factory/GuardAuthenticationFactoryTest.php
@@ -54,44 +54,44 @@ class GuardAuthenticationFactoryTest extends TestCase
 
     public function getValidConfigurationTests()
     {
-        $tests = array();
+        $tests = [];
 
         // completely basic
-        $tests[] = array(
-            array(
-                'authenticators' => array('authenticator1', 'authenticator2'),
+        $tests[] = [
+            [
+                'authenticators' => ['authenticator1', 'authenticator2'],
                 'provider' => 'some_provider',
                 'entry_point' => 'the_entry_point',
-            ),
-            array(
-                'authenticators' => array('authenticator1', 'authenticator2'),
+            ],
+            [
+                'authenticators' => ['authenticator1', 'authenticator2'],
                 'provider' => 'some_provider',
                 'entry_point' => 'the_entry_point',
-            ),
-        );
+            ],
+        ];
 
         // testing xml config fix: authenticator -> authenticators
-        $tests[] = array(
-            array(
-                'authenticator' => array('authenticator1', 'authenticator2'),
-            ),
-            array(
-                'authenticators' => array('authenticator1', 'authenticator2'),
+        $tests[] = [
+            [
+                'authenticator' => ['authenticator1', 'authenticator2'],
+            ],
+            [
+                'authenticators' => ['authenticator1', 'authenticator2'],
                 'entry_point' => null,
-            ),
-        );
+            ],
+        ];
 
         return $tests;
     }
 
     public function getInvalidConfigurationTests()
     {
-        $tests = array();
+        $tests = [];
 
         // testing not empty
-        $tests[] = array(
-            array('authenticators' => array()),
-        );
+        $tests[] = [
+            ['authenticators' => []],
+        ];
 
         return $tests;
     }
@@ -99,33 +99,33 @@ class GuardAuthenticationFactoryTest extends TestCase
     public function testBasicCreate()
     {
         // simple configuration
-        $config = array(
-            'authenticators' => array('authenticator123'),
+        $config = [
+            'authenticators' => ['authenticator123'],
             'entry_point' => null,
-        );
+        ];
         list($container, $entryPointId) = $this->executeCreate($config, null);
         $this->assertEquals('authenticator123', $entryPointId);
 
         $providerDefinition = $container->getDefinition('security.authentication.provider.guard.my_firewall');
-        $this->assertEquals(array(
-            'index_0' => new IteratorArgument(array(new Reference('authenticator123'))),
+        $this->assertEquals([
+            'index_0' => new IteratorArgument([new Reference('authenticator123')]),
             'index_1' => new Reference('my_user_provider'),
             'index_2' => 'my_firewall',
             'index_3' => new Reference('security.user_checker.my_firewall'),
-        ), $providerDefinition->getArguments());
+        ], $providerDefinition->getArguments());
 
         $listenerDefinition = $container->getDefinition('security.authentication.listener.guard.my_firewall');
         $this->assertEquals('my_firewall', $listenerDefinition->getArgument(2));
-        $this->assertEquals(array(new Reference('authenticator123')), $listenerDefinition->getArgument(3)->getValues());
+        $this->assertEquals([new Reference('authenticator123')], $listenerDefinition->getArgument(3)->getValues());
     }
 
     public function testExistingDefaultEntryPointUsed()
     {
         // any existing default entry point is used
-        $config = array(
-            'authenticators' => array('authenticator123'),
+        $config = [
+            'authenticators' => ['authenticator123'],
             'entry_point' => null,
-        );
+        ];
         list(, $entryPointId) = $this->executeCreate($config, 'some_default_entry_point');
         $this->assertEquals('some_default_entry_point', $entryPointId);
     }
@@ -136,10 +136,10 @@ class GuardAuthenticationFactoryTest extends TestCase
     public function testCannotOverrideDefaultEntryPoint()
     {
         // any existing default entry point is used
-        $config = array(
-            'authenticators' => array('authenticator123'),
+        $config = [
+            'authenticators' => ['authenticator123'],
             'entry_point' => 'authenticator123',
-        );
+        ];
         $this->executeCreate($config, 'some_default_entry_point');
     }
 
@@ -149,20 +149,20 @@ class GuardAuthenticationFactoryTest extends TestCase
     public function testMultipleAuthenticatorsRequiresEntryPoint()
     {
         // any existing default entry point is used
-        $config = array(
-            'authenticators' => array('authenticator123', 'authenticatorABC'),
+        $config = [
+            'authenticators' => ['authenticator123', 'authenticatorABC'],
             'entry_point' => null,
-        );
+        ];
         $this->executeCreate($config, null);
     }
 
     public function testCreateWithEntryPoint()
     {
         // any existing default entry point is used
-        $config = array(
-            'authenticators' => array('authenticator123', 'authenticatorABC'),
+        $config = [
+            'authenticators' => ['authenticator123', 'authenticatorABC'],
             'entry_point' => 'authenticatorABC',
-        );
+        ];
         list($container, $entryPointId) = $this->executeCreate($config, null);
         $this->assertEquals('authenticatorABC', $entryPointId);
     }
@@ -178,6 +178,6 @@ class GuardAuthenticationFactoryTest extends TestCase
         $factory = new GuardAuthenticationFactory();
         list($providerId, $listenerId, $entryPointId) = $factory->create($container, $id, $config, $userProviderId, $defaultEntryPointId);
 
-        return array($container, $entryPointId);
+        return [$container, $entryPointId];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
index 0154d2a5e5..3145d03572 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/DependencyInjection/SecurityExtensionTest.php
@@ -32,20 +32,20 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/secured_area/.*',
-                    'form_login' => array(
+                    'form_login' => [
                         'check_path' => '/some_area/login_check',
-                    ),
-                ),
-            ),
-        ));
+                    ],
+                ],
+            ],
+        ]);
 
         $container->compile();
     }
@@ -58,17 +58,17 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $container->compile();
     }
@@ -84,18 +84,18 @@ class SecurityExtensionTest extends TestCase
         $extension = $container->getExtension('security');
         $extension->addUserProviderFactory(new DummyProvider());
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'my_foo' => array('foo' => array()),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'my_foo' => ['foo' => []],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
-                    'http_basic' => array(),
-                ),
-            ),
-        ));
+                    'http_basic' => [],
+                ],
+            ],
+        ]);
 
         $container->compile();
     }
@@ -104,20 +104,20 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
             'role_hierarchy' => null,
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
                     'http_basic' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $container->compile();
 
@@ -128,46 +128,46 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '^/admin',
                     'http_basic' => null,
-                ),
-                'stateless_firewall' => array(
+                ],
+                'stateless_firewall' => [
                     'pattern' => '/.*',
                     'stateless' => true,
                     'http_basic' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $container->compile();
         $definition = $container->getDefinition('security.authentication.guard_handler');
-        $this->assertSame(array('stateless_firewall'), $definition->getArgument(2));
+        $this->assertSame(['stateless_firewall'], $definition->getArgument(2));
     }
 
     public function testSwitchUserNotStatelessOnStatelessFirewall()
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'stateless' => true,
                     'http_basic' => null,
                     'switch_user' => true,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $container->compile();
 
@@ -177,18 +177,18 @@ class SecurityExtensionTest extends TestCase
     public function testPerListenerProvider()
     {
         $container = $this->getRawContainer();
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'first' => array('id' => 'foo'),
-                'second' => array('id' => 'bar'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'first' => ['id' => 'foo'],
+                'second' => ['id' => 'bar'],
+            ],
 
-            'firewalls' => array(
-                'default' => array(
-                    'http_basic' => array('provider' => 'second'),
-                ),
-            ),
-        ));
+            'firewalls' => [
+                'default' => [
+                    'http_basic' => ['provider' => 'second'],
+                ],
+            ],
+        ]);
 
         $container->compile();
         $this->addToAssertionCount(1);
@@ -201,19 +201,19 @@ class SecurityExtensionTest extends TestCase
     public function testMissingProviderForListener()
     {
         $container = $this->getRawContainer();
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'first' => array('id' => 'foo'),
-                'second' => array('id' => 'bar'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'first' => ['id' => 'foo'],
+                'second' => ['id' => 'bar'],
+            ],
 
-            'firewalls' => array(
-                'ambiguous' => array(
+            'firewalls' => [
+                'ambiguous' => [
                     'http_basic' => true,
-                    'form_login' => array('provider' => 'second'),
-                ),
-            ),
-        ));
+                    'form_login' => ['provider' => 'second'],
+                ],
+            ],
+        ]);
 
         $container->compile();
     }
@@ -221,19 +221,19 @@ class SecurityExtensionTest extends TestCase
     public function testPerListenerProviderWithRememberMe()
     {
         $container = $this->getRawContainer();
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'first' => array('id' => 'foo'),
-                'second' => array('id' => 'bar'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'first' => ['id' => 'foo'],
+                'second' => ['id' => 'bar'],
+            ],
 
-            'firewalls' => array(
-                'default' => array(
-                    'form_login' => array('provider' => 'second'),
-                    'remember_me' => array('secret' => 'baz'),
-                ),
-            ),
-        ));
+            'firewalls' => [
+                'default' => [
+                    'form_login' => ['provider' => 'second'],
+                    'remember_me' => ['secret' => 'baz'],
+                ],
+            ],
+        ]);
 
         $container->compile();
         $this->addToAssertionCount(1);
@@ -245,20 +245,20 @@ class SecurityExtensionTest extends TestCase
 
         $rawExpression = "'foo' == 'bar' or 1 in [1, 3, 3]";
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
-            'firewalls' => array(
-                'some_firewall' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
-                    'http_basic' => array(),
-                ),
-            ),
-            'access_control' => array(
-                array('path' => '/', 'allow_if' => $rawExpression),
-            ),
-        ));
+                    'http_basic' => [],
+                ],
+            ],
+            'access_control' => [
+                ['path' => '/', 'allow_if' => $rawExpression],
+            ],
+        ]);
 
         $container->compile();
         $accessMap = $container->getDefinition('security.access_map');
@@ -275,7 +275,7 @@ class SecurityExtensionTest extends TestCase
 
         $this->assertTrue($container->hasDefinition('security.cache_warmer.expression'));
         $this->assertEquals(
-            new IteratorArgument(array(new Reference($expressionId))),
+            new IteratorArgument([new Reference($expressionId)]),
             $container->getDefinition('security.cache_warmer.expression')->getArgument(0)
         );
     }
@@ -283,17 +283,17 @@ class SecurityExtensionTest extends TestCase
     public function testRemovesExpressionCacheWarmerDefinitionIfNoExpressions()
     {
         $container = $this->getRawContainer();
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
-            'firewalls' => array(
-                'some_firewall' => array(
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
-                    'http_basic' => array(),
-                ),
-            ),
-        ));
+                    'http_basic' => [],
+                ],
+            ],
+        ]);
         $container->compile();
 
         $this->assertFalse($container->hasDefinition('security.cache_warmer.expression'));
@@ -303,18 +303,18 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'default' => array('id' => 'foo'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'default' => ['id' => 'foo'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
                     'http_basic' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $container->compile();
 
@@ -325,19 +325,19 @@ class SecurityExtensionTest extends TestCase
     {
         $container = $this->getRawContainer();
 
-        $container->loadFromExtension('security', array(
-            'providers' => array(
-                'first' => array('id' => 'foo'),
-                'second' => array('id' => 'bar'),
-            ),
+        $container->loadFromExtension('security', [
+            'providers' => [
+                'first' => ['id' => 'foo'],
+                'second' => ['id' => 'bar'],
+            ],
 
-            'firewalls' => array(
-                'some_firewall' => array(
+            'firewalls' => [
+                'some_firewall' => [
                     'pattern' => '/.*',
-                    'http_basic' => array('provider' => 'second'),
-                ),
-            ),
-        ));
+                    'http_basic' => ['provider' => 'second'],
+                ],
+            ],
+        ]);
 
         $container->compile();
 
@@ -352,22 +352,22 @@ class SecurityExtensionTest extends TestCase
         $container = $this->getRawContainer();
 
         $container->registerExtension(new FrameworkExtension());
-        $container->setParameter('kernel.bundles_metadata', array());
+        $container->setParameter('kernel.bundles_metadata', []);
         $container->setParameter('kernel.project_dir', __DIR__);
         $container->setParameter('kernel.root_dir', __DIR__);
         $container->setParameter('kernel.cache_dir', __DIR__);
 
-        $container->loadFromExtension('security', array(
-            'firewalls' => array(
-                'default' => array(
+        $container->loadFromExtension('security', [
+            'firewalls' => [
+                'default' => [
                     'form_login' => null,
-                    'remember_me' => array('secret' => 'baz'),
-                ),
-            ),
-        ));
-        $container->loadFromExtension('framework', array(
+                    'remember_me' => ['secret' => 'baz'],
+                ],
+            ],
+        ]);
+        $container->loadFromExtension('framework', [
             'session' => $config,
-        ));
+        ]);
 
         $container->compile();
 
@@ -379,22 +379,22 @@ class SecurityExtensionTest extends TestCase
 
     public function sessionConfigurationProvider()
     {
-        return array(
-            array(
+        return [
+            [
                 false,
                 null,
                 false,
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'cookie_secure' => true,
                     'cookie_samesite' => 'lax',
                     'save_path' => null,
-                ),
+                ],
                 'lax',
                 true,
-            ),
-        );
+            ],
+        ];
     }
 
     protected function getRawContainer()
@@ -408,8 +408,8 @@ class SecurityExtensionTest extends TestCase
         $bundle = new SecurityBundle();
         $bundle->build($container);
 
-        $container->getCompilerPassConfig()->setOptimizationPasses(array());
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
 
         return $container;
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/EventListener/VoteListenerTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/EventListener/VoteListenerTest.php
index 52333c85de..3406e16503 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/EventListener/VoteListenerTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/EventListener/VoteListenerTest.php
@@ -26,15 +26,15 @@ class VoteListenerTest extends TestCase
         $traceableAccessDecisionManager = $this
             ->getMockBuilder(TraceableAccessDecisionManager::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('addVoterVote'))
+            ->setMethods(['addVoterVote'])
             ->getMock();
 
         $traceableAccessDecisionManager
             ->expects($this->once())
             ->method('addVoterVote')
-            ->with($voter, array('myattr1', 'myattr2'), VoterInterface::ACCESS_GRANTED);
+            ->with($voter, ['myattr1', 'myattr2'], VoterInterface::ACCESS_GRANTED);
 
         $sut = new VoteListener($traceableAccessDecisionManager);
-        $sut->onVoterVote(new VoteEvent($voter, 'mysubject', array('myattr1', 'myattr2'), VoterInterface::ACCESS_GRANTED));
+        $sut->onVoterVote(new VoteEvent($voter, 'mysubject', ['myattr1', 'myattr2'], VoterInterface::ACCESS_GRANTED));
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AuthenticationCommencingTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AuthenticationCommencingTest.php
index 6ac0e6a3af..2a31f2a27a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AuthenticationCommencingTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AuthenticationCommencingTest.php
@@ -15,7 +15,7 @@ class AuthenticationCommencingTest extends WebTestCase
 {
     public function testAuthenticationIsCommencingIfAccessDeniedExceptionIsWrapped()
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'config.yml']);
 
         $client->request('GET', '/secure-but-not-covered-by-access-control');
         $this->assertRedirect($client->getResponse(), '/login');
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AutowiringTypesTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AutowiringTypesTest.php
index 25a70577b2..31d296e48a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AutowiringTypesTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/AutowiringTypesTest.php
@@ -18,19 +18,19 @@ class AutowiringTypesTest extends WebTestCase
 {
     public function testAccessDecisionManagerAutowiring()
     {
-        static::bootKernel(array('debug' => false));
+        static::bootKernel(['debug' => false]);
 
         $autowiredServices = static::$container->get('test.autowiring_types.autowired_services');
         $this->assertInstanceOf(AccessDecisionManager::class, $autowiredServices->getAccessDecisionManager(), 'The security.access.decision_manager service should be injected in debug mode');
 
-        static::bootKernel(array('debug' => true));
+        static::bootKernel(['debug' => true]);
 
         $autowiredServices = static::$container->get('test.autowiring_types.autowired_services');
         $this->assertInstanceOf(TraceableAccessDecisionManager::class, $autowiredServices->getAccessDecisionManager(), 'The debug.security.access.decision_manager service should be injected in non-debug mode');
     }
 
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
-        return parent::createKernel(array('test_case' => 'AutowiringTypes') + $options);
+        return parent::createKernel(['test_case' => 'AutowiringTypes'] + $options);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Controller/LoginController.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Controller/LoginController.php
index 90f4d355a4..bafa0f68ce 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Controller/LoginController.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Controller/LoginController.php
@@ -24,9 +24,9 @@ class LoginController implements ContainerAwareInterface
     {
         $form = $this->container->get('form.factory')->create('Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\CsrfFormLoginBundle\Form\UserLoginType');
 
-        return new Response($this->container->get('twig')->render('@CsrfFormLogin/Login/login.html.twig', array(
+        return new Response($this->container->get('twig')->render('@CsrfFormLogin/Login/login.html.twig', [
             'form' => $form->createView(),
-        )));
+        ]));
     }
 
     public function afterLoginAction()
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Form/UserLoginType.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Form/UserLoginType.php
index 2f4f20df3a..63b27512d5 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Form/UserLoginType.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/CsrfFormLoginBundle/Form/UserLoginType.php
@@ -65,9 +65,9 @@ class UserLoginType extends AbstractType
                 $event->getForm()->addError(new FormError($error->getMessage()));
             }
 
-            $event->setData(array_replace((array) $event->getData(), array(
+            $event->setData(array_replace((array) $event->getData(), [
                 'username' => $request->getSession()->get(Security::LAST_USERNAME),
-            )));
+            ]));
         });
     }
 
@@ -80,8 +80,8 @@ class UserLoginType extends AbstractType
          * listener in order for the CSRF token to validate successfully.
          */
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'csrf_token_id' => 'authenticate',
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LocalizedController.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LocalizedController.php
index 33d70ef7df..3bf2a7767c 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LocalizedController.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LocalizedController.php
@@ -30,11 +30,11 @@ class LocalizedController implements ContainerAwareInterface
             $error = $request->getSession()->get(Security::AUTHENTICATION_ERROR);
         }
 
-        return new Response($this->container->get('twig')->render('@FormLogin/Localized/login.html.twig', array(
+        return new Response($this->container->get('twig')->render('@FormLogin/Localized/login.html.twig', [
             // last username entered by the user
             'last_username' => $request->getSession()->get(Security::LAST_USERNAME),
             'error' => $error,
-        )));
+        ]));
     }
 
     public function loginCheckAction()
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LoginController.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LoginController.php
index 04fe49055b..60eef86718 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LoginController.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Controller/LoginController.php
@@ -32,16 +32,16 @@ class LoginController implements ContainerAwareInterface
             $error = $request->getSession()->get(Security::AUTHENTICATION_ERROR);
         }
 
-        return new Response($this->container->get('twig')->render('@FormLogin/Login/login.html.twig', array(
+        return new Response($this->container->get('twig')->render('@FormLogin/Login/login.html.twig', [
             // last username entered by the user
             'last_username' => $request->getSession()->get(Security::LAST_USERNAME),
             'error' => $error,
-        )));
+        ]));
     }
 
     public function afterLoginAction(UserInterface $user)
     {
-        return new Response($this->container->get('twig')->render('@FormLogin/Login/after_login.html.twig', array('user' => $user)));
+        return new Response($this->container->get('twig')->render('@FormLogin/Login/after_login.html.twig', ['user' => $user]));
     }
 
     public function loginCheckAction()
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Security/LocalizedFormFailureHandler.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Security/LocalizedFormFailureHandler.php
index 7b97199065..f8f1c450d3 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Security/LocalizedFormFailureHandler.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/FormLoginBundle/Security/LocalizedFormFailureHandler.php
@@ -29,6 +29,6 @@ class LocalizedFormFailureHandler implements AuthenticationFailureHandlerInterfa
 
     public function onAuthenticationFailure(Request $request, AuthenticationException $exception)
     {
-        return new RedirectResponse($this->router->generate('localized_login_path', array(), UrlGeneratorInterface::ABSOLUTE_URL));
+        return new RedirectResponse($this->router->generate('localized_login_path', [], UrlGeneratorInterface::ABSOLUTE_URL));
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Controller/TestController.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Controller/TestController.php
index 3effab9b59..cba75a1526 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Controller/TestController.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Controller/TestController.php
@@ -21,6 +21,6 @@ class TestController
 {
     public function loginCheckAction(UserInterface $user)
     {
-        return new JsonResponse(array('message' => sprintf('Welcome @%s!', $user->getUsername())));
+        return new JsonResponse(['message' => sprintf('Welcome @%s!', $user->getUsername())]);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationFailureHandler.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationFailureHandler.php
index fbd482ddff..737c5a5abe 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationFailureHandler.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationFailureHandler.php
@@ -20,6 +20,6 @@ class JsonAuthenticationFailureHandler implements AuthenticationFailureHandlerIn
 {
     public function onAuthenticationFailure(Request $request, AuthenticationException $exception)
     {
-        return new JsonResponse(array('message' => 'Something went wrong'), 500);
+        return new JsonResponse(['message' => 'Something went wrong'], 500);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationSuccessHandler.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationSuccessHandler.php
index 0e65bbb56b..0390eb8e35 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationSuccessHandler.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/Bundle/JsonLoginBundle/Security/Http/JsonAuthenticationSuccessHandler.php
@@ -20,6 +20,6 @@ class JsonAuthenticationSuccessHandler implements AuthenticationSuccessHandlerIn
 {
     public function onAuthenticationSuccess(Request $request, TokenInterface $token)
     {
-        return new JsonResponse(array('message' => sprintf('Good game @%s!', $token->getUsername())));
+        return new JsonResponse(['message' => sprintf('Good game @%s!', $token->getUsername())]);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/CsrfFormLoginTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/CsrfFormLoginTest.php
index 2d95d35065..98b52a5f05 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/CsrfFormLoginTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/CsrfFormLoginTest.php
@@ -18,7 +18,7 @@ class CsrfFormLoginTest extends WebTestCase
      */
     public function testFormLoginAndLogoutWithCsrfTokens($config)
     {
-        $client = $this->createClient(array('test_case' => 'CsrfFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'CsrfFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['user_login[username]'] = 'johannes';
@@ -48,7 +48,7 @@ class CsrfFormLoginTest extends WebTestCase
      */
     public function testFormLoginWithInvalidCsrfToken($config)
     {
-        $client = $this->createClient(array('test_case' => 'CsrfFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'CsrfFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['user_login[_token]'] = '';
@@ -65,7 +65,7 @@ class CsrfFormLoginTest extends WebTestCase
      */
     public function testFormLoginWithCustomTargetPath($config)
     {
-        $client = $this->createClient(array('test_case' => 'CsrfFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'CsrfFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['user_login[username]'] = 'johannes';
@@ -85,7 +85,7 @@ class CsrfFormLoginTest extends WebTestCase
      */
     public function testFormLoginRedirectsToProtectedResourceAfterLogin($config)
     {
-        $client = $this->createClient(array('test_case' => 'CsrfFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'CsrfFormLogin', 'root_config' => $config]);
 
         $client->request('GET', '/protected-resource');
         $this->assertRedirect($client->getResponse(), '/login');
@@ -103,9 +103,9 @@ class CsrfFormLoginTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(
-            array('config.yml'),
-            array('routes_as_path.yml'),
-        );
+        return [
+            ['config.yml'],
+            ['routes_as_path.yml'],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FirewallEntryPointTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FirewallEntryPointTest.php
index 8179c2e942..8afedc42e4 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FirewallEntryPointTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FirewallEntryPointTest.php
@@ -17,12 +17,12 @@ class FirewallEntryPointTest extends WebTestCase
 {
     public function testItUsesTheConfiguredEntryPointWhenUsingUnknownCredentials()
     {
-        $client = $this->createClient(array('test_case' => 'FirewallEntryPoint'));
+        $client = $this->createClient(['test_case' => 'FirewallEntryPoint']);
 
-        $client->request('GET', '/secure/resource', array(), array(), array(
+        $client->request('GET', '/secure/resource', [], [], [
             'PHP_AUTH_USER' => 'unknown',
             'PHP_AUTH_PW' => 'credentials',
-        ));
+        ]);
 
         $this->assertEquals(
             EntryPointStub::RESPONSE_TEXT,
@@ -33,7 +33,7 @@ class FirewallEntryPointTest extends WebTestCase
 
     public function testItUsesTheConfiguredEntryPointFromTheExceptionListenerWithFormLoginAndNoCredentials()
     {
-        $client = $this->createClient(array('test_case' => 'FirewallEntryPoint', 'root_config' => 'config_form_login.yml'));
+        $client = $this->createClient(['test_case' => 'FirewallEntryPoint', 'root_config' => 'config_form_login.yml']);
 
         $client->request('GET', '/secure/resource');
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FormLoginTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FormLoginTest.php
index c2e766e9ac..ec1722188a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FormLoginTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/FormLoginTest.php
@@ -18,7 +18,7 @@ class FormLoginTest extends WebTestCase
      */
     public function testFormLogin($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['_username'] = 'johannes';
@@ -37,7 +37,7 @@ class FormLoginTest extends WebTestCase
      */
     public function testFormLogout($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['_username'] = 'johannes';
@@ -70,7 +70,7 @@ class FormLoginTest extends WebTestCase
      */
     public function testFormLoginWithCustomTargetPath($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['_username'] = 'johannes';
@@ -90,7 +90,7 @@ class FormLoginTest extends WebTestCase
      */
     public function testFormLoginRedirectsToProtectedResourceAfterLogin($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
 
         $client->request('GET', '/protected_resource');
         $this->assertRedirect($client->getResponse(), '/login');
@@ -108,9 +108,9 @@ class FormLoginTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(
-            array('config.yml'),
-            array('routes_as_path.yml'),
-        );
+        return [
+            ['config.yml'],
+            ['routes_as_path.yml'],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginLdapTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginLdapTest.php
index 09b22e2ffa..6b7dca4b42 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginLdapTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginLdapTest.php
@@ -17,7 +17,7 @@ class JsonLoginLdapTest extends WebTestCase
 {
     public function testKernelBoot()
     {
-        $kernel = self::createKernel(array('test_case' => 'JsonLoginLdap', 'root_config' => 'config.yml'));
+        $kernel = self::createKernel(['test_case' => 'JsonLoginLdap', 'root_config' => 'config.yml']);
         $kernel->boot();
 
         $this->assertInstanceOf(Kernel::class, $kernel);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginTest.php
index 7ee4c9b25d..c7e9e2aab7 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/JsonLoginTest.php
@@ -20,56 +20,56 @@ class JsonLoginTest extends WebTestCase
 {
     public function testDefaultJsonLoginSuccess()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'config.yml'));
-        $client->request('POST', '/chk', array(), array(), array('CONTENT_TYPE' => 'application/json'), '{"user": {"login": "dunglas", "password": "foo"}}');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'config.yml']);
+        $client->request('POST', '/chk', [], [], ['CONTENT_TYPE' => 'application/json'], '{"user": {"login": "dunglas", "password": "foo"}}');
         $response = $client->getResponse();
 
         $this->assertInstanceOf(JsonResponse::class, $response);
         $this->assertSame(200, $response->getStatusCode());
-        $this->assertSame(array('message' => 'Welcome @dunglas!'), json_decode($response->getContent(), true));
+        $this->assertSame(['message' => 'Welcome @dunglas!'], json_decode($response->getContent(), true));
     }
 
     public function testDefaultJsonLoginFailure()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'config.yml'));
-        $client->request('POST', '/chk', array(), array(), array('CONTENT_TYPE' => 'application/json'), '{"user": {"login": "dunglas", "password": "bad"}}');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'config.yml']);
+        $client->request('POST', '/chk', [], [], ['CONTENT_TYPE' => 'application/json'], '{"user": {"login": "dunglas", "password": "bad"}}');
         $response = $client->getResponse();
 
         $this->assertInstanceOf(JsonResponse::class, $response);
         $this->assertSame(401, $response->getStatusCode());
-        $this->assertSame(array('error' => 'Invalid credentials.'), json_decode($response->getContent(), true));
+        $this->assertSame(['error' => 'Invalid credentials.'], json_decode($response->getContent(), true));
     }
 
     public function testCustomJsonLoginSuccess()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'custom_handlers.yml'));
-        $client->request('POST', '/chk', array(), array(), array('CONTENT_TYPE' => 'application/json'), '{"user": {"login": "dunglas", "password": "foo"}}');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'custom_handlers.yml']);
+        $client->request('POST', '/chk', [], [], ['CONTENT_TYPE' => 'application/json'], '{"user": {"login": "dunglas", "password": "foo"}}');
         $response = $client->getResponse();
 
         $this->assertInstanceOf(JsonResponse::class, $response);
         $this->assertSame(200, $response->getStatusCode());
-        $this->assertSame(array('message' => 'Good game @dunglas!'), json_decode($response->getContent(), true));
+        $this->assertSame(['message' => 'Good game @dunglas!'], json_decode($response->getContent(), true));
     }
 
     public function testCustomJsonLoginFailure()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'custom_handlers.yml'));
-        $client->request('POST', '/chk', array(), array(), array('CONTENT_TYPE' => 'application/json'), '{"user": {"login": "dunglas", "password": "bad"}}');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'custom_handlers.yml']);
+        $client->request('POST', '/chk', [], [], ['CONTENT_TYPE' => 'application/json'], '{"user": {"login": "dunglas", "password": "bad"}}');
         $response = $client->getResponse();
 
         $this->assertInstanceOf(JsonResponse::class, $response);
         $this->assertSame(500, $response->getStatusCode());
-        $this->assertSame(array('message' => 'Something went wrong'), json_decode($response->getContent(), true));
+        $this->assertSame(['message' => 'Something went wrong'], json_decode($response->getContent(), true));
     }
 
     public function testDefaultJsonLoginBadRequest()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'config.yml'));
-        $client->request('POST', '/chk', array(), array(), array('CONTENT_TYPE' => 'application/json'), 'Not a json content');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'config.yml']);
+        $client->request('POST', '/chk', [], [], ['CONTENT_TYPE' => 'application/json'], 'Not a json content');
         $response = $client->getResponse();
 
         $this->assertSame(400, $response->getStatusCode());
         $this->assertSame('application/json', $response->headers->get('Content-Type'));
-        $this->assertArraySubset(array('error' => array('code' => 400, 'message' => 'Bad Request')), json_decode($response->getContent(), true));
+        $this->assertArraySubset(['error' => ['code' => 400, 'message' => 'Bad Request']], json_decode($response->getContent(), true));
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LocalizedRoutesAsPathTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LocalizedRoutesAsPathTest.php
index cb600764ea..c874ada34a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LocalizedRoutesAsPathTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LocalizedRoutesAsPathTest.php
@@ -18,7 +18,7 @@ class LocalizedRoutesAsPathTest extends WebTestCase
      */
     public function testLoginLogoutProcedure($locale)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes.yml']);
 
         $crawler = $client->request('GET', '/'.$locale.'/login');
         $form = $crawler->selectButton('login')->form();
@@ -39,7 +39,7 @@ class LocalizedRoutesAsPathTest extends WebTestCase
      */
     public function testLoginFailureWithLocalizedFailurePath($locale)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'localized_form_failure_handler.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'localized_form_failure_handler.yml']);
 
         $crawler = $client->request('GET', '/'.$locale.'/login');
         $form = $crawler->selectButton('login')->form();
@@ -55,7 +55,7 @@ class LocalizedRoutesAsPathTest extends WebTestCase
      */
     public function testAccessRestrictedResource($locale)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes.yml']);
 
         $client->request('GET', '/'.$locale.'/secure/');
         $this->assertRedirect($client->getResponse(), '/'.$locale.'/login');
@@ -66,7 +66,7 @@ class LocalizedRoutesAsPathTest extends WebTestCase
      */
     public function testAccessRestrictedResourceWithForward($locale)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes_with_forward.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'localized_routes_with_forward.yml']);
 
         $crawler = $client->request('GET', '/'.$locale.'/secure/');
         $this->assertCount(1, $crawler->selectButton('login'), (string) $client->getResponse());
@@ -74,6 +74,6 @@ class LocalizedRoutesAsPathTest extends WebTestCase
 
     public function getLocales()
     {
-        return array(array('en'), array('de'));
+        return [['en'], ['de']];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LogoutTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LogoutTest.php
index 082751bb4e..ef417923d2 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LogoutTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/LogoutTest.php
@@ -15,12 +15,12 @@ class LogoutTest extends WebTestCase
 {
     public function testSessionLessRememberMeLogout()
     {
-        $client = $this->createClient(array('test_case' => 'RememberMeLogout', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'RememberMeLogout', 'root_config' => 'config.yml']);
 
-        $client->request('POST', '/login', array(
+        $client->request('POST', '/login', [
             '_username' => 'johannes',
             '_password' => 'test',
-        ));
+        ]);
 
         $cookieJar = $client->getCookieJar();
         $cookieJar->expire(session_name());
@@ -35,13 +35,13 @@ class LogoutTest extends WebTestCase
 
     public function testCsrfTokensAreClearedOnLogout()
     {
-        $client = $this->createClient(array('test_case' => 'LogoutWithoutSessionInvalidation', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'LogoutWithoutSessionInvalidation', 'root_config' => 'config.yml']);
         static::$container->get('security.csrf.token_storage')->setToken('foo', 'bar');
 
-        $client->request('POST', '/login', array(
+        $client->request('POST', '/login', [
             '_username' => 'johannes',
             '_password' => 'test',
-        ));
+        ]);
 
         $this->assertTrue(static::$container->get('security.csrf.token_storage')->hasToken('foo'));
         $this->assertSame('bar', static::$container->get('security.csrf.token_storage')->getToken('foo'));
@@ -53,9 +53,9 @@ class LogoutTest extends WebTestCase
 
     public function testAccessControlDoesNotApplyOnLogout()
     {
-        $client = $this->createClient(array('test_case' => 'LogoutAccess', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'LogoutAccess', 'root_config' => 'config.yml']);
 
-        $client->request('POST', '/login', array('_username' => 'johannes', '_password' => 'test'));
+        $client->request('POST', '/login', ['_username' => 'johannes', '_password' => 'test']);
         $client->request('GET', '/logout');
 
         $this->assertRedirect($client->getResponse(), '/');
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/MissingUserProviderTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/MissingUserProviderTest.php
index f1efe64928..378ff26b38 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/MissingUserProviderTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/MissingUserProviderTest.php
@@ -19,11 +19,11 @@ class MissingUserProviderTest extends WebTestCase
      */
     public function testUserProviderIsNeeded()
     {
-        $client = $this->createClient(array('test_case' => 'MissingUserProvider', 'root_config' => 'config.yml'));
+        $client = $this->createClient(['test_case' => 'MissingUserProvider', 'root_config' => 'config.yml']);
 
-        $client->request('GET', '/', array(), array(), array(
+        $client->request('GET', '/', [], [], [
             'PHP_AUTH_USER' => 'username',
             'PHP_AUTH_PW' => 'pa$$word',
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityRoutingIntegrationTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityRoutingIntegrationTest.php
index 5996415e10..0d2d6da0cf 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityRoutingIntegrationTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityRoutingIntegrationTest.php
@@ -18,7 +18,7 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testRoutingErrorIsNotExposedForProtectedResourceWhenAnonymous($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
         $client->request('GET', '/protected_resource');
 
         $this->assertRedirect($client->getResponse(), '/login');
@@ -29,7 +29,7 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testRoutingErrorIsExposedWhenNotProtected($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
         $client->request('GET', '/unprotected_resource');
 
         $this->assertEquals(404, $client->getResponse()->getStatusCode(), (string) $client->getResponse());
@@ -40,7 +40,7 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testRoutingErrorIsNotExposedForProtectedResourceWhenLoggedInWithInsufficientRights($config)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config]);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
         $form['_username'] = 'johannes';
@@ -57,8 +57,8 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testSecurityConfigurationForSingleIPAddress($config)
     {
-        $allowedClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('REMOTE_ADDR' => '10.10.10.10'));
-        $barredClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('REMOTE_ADDR' => '10.10.20.10'));
+        $allowedClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['REMOTE_ADDR' => '10.10.10.10']);
+        $barredClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['REMOTE_ADDR' => '10.10.20.10']);
 
         $this->assertAllowed($allowedClient, '/secured-by-one-ip');
         $this->assertRestricted($barredClient, '/secured-by-one-ip');
@@ -69,9 +69,9 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testSecurityConfigurationForMultipleIPAddresses($config)
     {
-        $allowedClientA = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('REMOTE_ADDR' => '1.1.1.1'));
-        $allowedClientB = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('REMOTE_ADDR' => '2.2.2.2'));
-        $barredClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('REMOTE_ADDR' => '192.168.1.1'));
+        $allowedClientA = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['REMOTE_ADDR' => '1.1.1.1']);
+        $allowedClientB = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['REMOTE_ADDR' => '2.2.2.2']);
+        $barredClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['REMOTE_ADDR' => '192.168.1.1']);
 
         $this->assertAllowed($allowedClientA, '/secured-by-two-ips');
         $this->assertAllowed($allowedClientB, '/secured-by-two-ips');
@@ -83,13 +83,13 @@ class SecurityRoutingIntegrationTest extends WebTestCase
      */
     public function testSecurityConfigurationForExpression($config)
     {
-        $allowedClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array('HTTP_USER_AGENT' => 'Firefox 1.0'));
+        $allowedClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], ['HTTP_USER_AGENT' => 'Firefox 1.0']);
         $this->assertAllowed($allowedClient, '/protected-via-expression');
 
-        $barredClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array());
+        $barredClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], []);
         $this->assertRestricted($barredClient, '/protected-via-expression');
 
-        $allowedClient = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => $config), array());
+        $allowedClient = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => $config], []);
 
         $allowedClient->request('GET', '/protected-via-expression');
         $form = $allowedClient->followRedirect()->selectButton('login')->form();
@@ -114,6 +114,6 @@ class SecurityRoutingIntegrationTest extends WebTestCase
 
     public function getConfigs()
     {
-        return array(array('config.yml'), array('routes_as_path.yml'));
+        return [['config.yml'], ['routes_as_path.yml']];
     }
 }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityTest.php
index bcf8a0d620..ff687d0792 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SecurityTest.php
@@ -18,13 +18,13 @@ class SecurityTest extends WebTestCase
 {
     public function testServiceIsFunctional()
     {
-        $kernel = self::createKernel(array('test_case' => 'SecurityHelper', 'root_config' => 'config.yml'));
+        $kernel = self::createKernel(['test_case' => 'SecurityHelper', 'root_config' => 'config.yml']);
         $kernel->boot();
         $container = $kernel->getContainer();
 
         // put a token into the storage so the final calls can function
         $user = new User('foo', 'pass');
-        $token = new UsernamePasswordToken($user, '', 'provider', array('ROLE_USER'));
+        $token = new UsernamePasswordToken($user, '', 'provider', ['ROLE_USER']);
         $container->get('security.token_storage')->setToken($token);
 
         $security = $container->get('functional_test.security.helper');
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SwitchUserTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SwitchUserTest.php
index 97b0a55919..ddbfd629c8 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SwitchUserTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/SwitchUserTest.php
@@ -53,29 +53,29 @@ class SwitchUserTest extends WebTestCase
 
     public function testSwitchUserStateless()
     {
-        $client = $this->createClient(array('test_case' => 'JsonLogin', 'root_config' => 'switchuser_stateless.yml'));
-        $client->request('POST', '/chk', array(), array(), array('HTTP_X_SWITCH_USER' => 'dunglas', 'CONTENT_TYPE' => 'application/json'), '{"user": {"login": "user_can_switch", "password": "test"}}');
+        $client = $this->createClient(['test_case' => 'JsonLogin', 'root_config' => 'switchuser_stateless.yml']);
+        $client->request('POST', '/chk', [], [], ['HTTP_X_SWITCH_USER' => 'dunglas', 'CONTENT_TYPE' => 'application/json'], '{"user": {"login": "user_can_switch", "password": "test"}}');
         $response = $client->getResponse();
 
         $this->assertInstanceOf(JsonResponse::class, $response);
         $this->assertSame(200, $response->getStatusCode());
-        $this->assertSame(array('message' => 'Welcome @dunglas!'), json_decode($response->getContent(), true));
+        $this->assertSame(['message' => 'Welcome @dunglas!'], json_decode($response->getContent(), true));
         $this->assertSame('dunglas', $client->getProfile()->getCollector('security')->getUser());
     }
 
     public function getTestParameters()
     {
-        return array(
-            'unauthorized_user_cannot_switch' => array('user_cannot_switch_1', 'user_cannot_switch_1', 'user_cannot_switch_1', 403),
-            'authorized_user_can_switch' => array('user_can_switch', 'user_cannot_switch_1', 'user_cannot_switch_1', 200),
-            'authorized_user_cannot_switch_to_non_existent' => array('user_can_switch', 'user_does_not_exist', 'user_can_switch', 500),
-            'authorized_user_can_switch_to_himself' => array('user_can_switch', 'user_can_switch', 'user_can_switch', 200),
-        );
+        return [
+            'unauthorized_user_cannot_switch' => ['user_cannot_switch_1', 'user_cannot_switch_1', 'user_cannot_switch_1', 403],
+            'authorized_user_can_switch' => ['user_can_switch', 'user_cannot_switch_1', 'user_cannot_switch_1', 200],
+            'authorized_user_cannot_switch_to_non_existent' => ['user_can_switch', 'user_does_not_exist', 'user_can_switch', 500],
+            'authorized_user_can_switch_to_himself' => ['user_can_switch', 'user_can_switch', 'user_can_switch', 200],
+        ];
     }
 
     protected function createAuthenticatedClient($username)
     {
-        $client = $this->createClient(array('test_case' => 'StandardFormLogin', 'root_config' => 'switchuser.yml'));
+        $client = $this->createClient(['test_case' => 'StandardFormLogin', 'root_config' => 'switchuser.yml']);
         $client->followRedirects(true);
 
         $form = $client->request('GET', '/login')->selectButton('login')->form();
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/UserPasswordEncoderCommandTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/UserPasswordEncoderCommandTest.php
index 4245d07687..faec77550b 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/UserPasswordEncoderCommandTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/UserPasswordEncoderCommandTest.php
@@ -32,12 +32,12 @@ class UserPasswordEncoderCommandTest extends WebTestCase
 
     public function testEncodePasswordEmptySalt()
     {
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
             'user-class' => 'Symfony\Component\Security\Core\User\User',
             '--empty-salt' => true,
-        ), array('decorated' => false));
+        ], ['decorated' => false]);
         $expected = str_replace("\n", PHP_EOL, file_get_contents(__DIR__.'/app/PasswordEncode/emptysalt.txt'));
 
         $this->assertEquals($expected, $this->passwordEncoderCommandTester->getDisplay());
@@ -45,9 +45,9 @@ class UserPasswordEncoderCommandTest extends WebTestCase
 
     public function testEncodeNoPasswordNoInteraction()
     {
-        $statusCode = $this->passwordEncoderCommandTester->execute(array(
+        $statusCode = $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $this->assertContains('[ERROR] The password must not be empty.', $this->passwordEncoderCommandTester->getDisplay());
         $this->assertEquals($statusCode, 1);
@@ -55,11 +55,11 @@ class UserPasswordEncoderCommandTest extends WebTestCase
 
     public function testEncodePasswordBcrypt()
     {
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
             'user-class' => 'Custom\Class\Bcrypt\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $output = $this->passwordEncoderCommandTester->getDisplay();
         $this->assertContains('Password encoding succeeded', $output);
@@ -76,11 +76,11 @@ class UserPasswordEncoderCommandTest extends WebTestCase
             $this->markTestSkipped('Argon2i algorithm not available.');
         }
         $this->setupArgon2i();
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
             'user-class' => 'Custom\Class\Argon2i\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $output = $this->passwordEncoderCommandTester->getDisplay();
         $this->assertContains('Password encoding succeeded', $output);
@@ -93,11 +93,11 @@ class UserPasswordEncoderCommandTest extends WebTestCase
 
     public function testEncodePasswordPbkdf2()
     {
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
             'user-class' => 'Custom\Class\Pbkdf2\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $output = $this->passwordEncoderCommandTester->getDisplay();
         $this->assertContains('Password encoding succeeded', $output);
@@ -113,10 +113,10 @@ class UserPasswordEncoderCommandTest extends WebTestCase
     public function testEncodePasswordOutput()
     {
         $this->passwordEncoderCommandTester->execute(
-            array(
+            [
                 'command' => 'security:encode-password',
                 'password' => 'p@ssw0rd',
-            ), array('interactive' => false)
+            ], ['interactive' => false]
         );
 
         $this->assertContains('Password encoding succeeded', $this->passwordEncoderCommandTester->getDisplay());
@@ -127,12 +127,12 @@ class UserPasswordEncoderCommandTest extends WebTestCase
     public function testEncodePasswordEmptySaltOutput()
     {
         $this->passwordEncoderCommandTester->execute(
-            array(
+            [
                 'command' => 'security:encode-password',
                 'password' => 'p@ssw0rd',
                 'user-class' => 'Symfony\Component\Security\Core\User\User',
                 '--empty-salt' => true,
-            )
+            ]
         );
 
         $this->assertContains('Password encoding succeeded', $this->passwordEncoderCommandTester->getDisplay());
@@ -142,11 +142,11 @@ class UserPasswordEncoderCommandTest extends WebTestCase
 
     public function testEncodePasswordBcryptOutput()
     {
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'p@ssw0rd',
             'user-class' => 'Custom\Class\Bcrypt\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $this->assertNotContains(' Generated salt ', $this->passwordEncoderCommandTester->getDisplay());
     }
@@ -158,11 +158,11 @@ class UserPasswordEncoderCommandTest extends WebTestCase
         }
 
         $this->setupArgon2i();
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'p@ssw0rd',
             'user-class' => 'Custom\Class\Argon2i\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $this->assertNotContains(' Generated salt ', $this->passwordEncoderCommandTester->getDisplay());
     }
@@ -176,20 +176,20 @@ class UserPasswordEncoderCommandTest extends WebTestCase
             $this->setExpectedException('\RuntimeException', 'No encoder has been configured for account "Foo\Bar\User".');
         }
 
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
             'user-class' => 'Foo\Bar\User',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
     }
 
     public function testEncodePasswordAsksNonProvidedUserClass()
     {
-        $this->passwordEncoderCommandTester->setInputs(array('Custom\Class\Pbkdf2\User', "\n"));
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->setInputs(['Custom\Class\Pbkdf2\User', "\n"]);
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
-        ), array('decorated' => false));
+        ], ['decorated' => false]);
 
         $this->assertContains(<<<EOTXT
  For which user class would you like to encode a password? [Custom\Class\Bcrypt\User]:
@@ -203,10 +203,10 @@ EOTXT
 
     public function testNonInteractiveEncodePasswordUsesFirstUserClass()
     {
-        $this->passwordEncoderCommandTester->execute(array(
+        $this->passwordEncoderCommandTester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
 
         $this->assertContains('Encoder used       Symfony\Component\Security\Core\Encoder\PlaintextPasswordEncoder', $this->passwordEncoderCommandTester->getDisplay());
     }
@@ -218,21 +218,21 @@ EOTXT
     public function testThrowsExceptionOnNoConfiguredEncoders()
     {
         $application = new ConsoleApplication();
-        $application->add(new UserPasswordEncoderCommand($this->getMockBuilder(EncoderFactoryInterface::class)->getMock(), array()));
+        $application->add(new UserPasswordEncoderCommand($this->getMockBuilder(EncoderFactoryInterface::class)->getMock(), []));
 
         $passwordEncoderCommand = $application->find('security:encode-password');
 
         $tester = new CommandTester($passwordEncoderCommand);
-        $tester->execute(array(
+        $tester->execute([
             'command' => 'security:encode-password',
             'password' => 'password',
-        ), array('interactive' => false));
+        ], ['interactive' => false]);
     }
 
     protected function setUp()
     {
         putenv('COLUMNS='.(119 + \strlen(PHP_EOL)));
-        $kernel = $this->createKernel(array('test_case' => 'PasswordEncode'));
+        $kernel = $this->createKernel(['test_case' => 'PasswordEncode']);
         $kernel->boot();
 
         $application = new Application($kernel);
@@ -250,7 +250,7 @@ EOTXT
     private function setupArgon2i()
     {
         putenv('COLUMNS='.(119 + \strlen(PHP_EOL)));
-        $kernel = $this->createKernel(array('test_case' => 'PasswordEncode', 'root_config' => 'argon2i.yml'));
+        $kernel = $this->createKernel(['test_case' => 'PasswordEncode', 'root_config' => 'argon2i.yml']);
         $kernel->boot();
 
         $application = new Application($kernel);
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
index 03e2f3c72c..f1d23b6054 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/WebTestCase.php
@@ -49,7 +49,7 @@ class WebTestCase extends BaseWebTestCase
         return 'Symfony\Bundle\SecurityBundle\Tests\Functional\app\AppKernel';
     }
 
-    protected static function createKernel(array $options = array())
+    protected static function createKernel(array $options = [])
     {
         $class = self::getKernelClass();
 
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
index 4d3f7df20d..f5b85e0c05 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AppKernel.php
@@ -82,7 +82,7 @@ class AppKernel extends Kernel
 
     public function serialize()
     {
-        return serialize(array($this->varDir, $this->testCase, $this->rootConfig, $this->getEnvironment(), $this->isDebug()));
+        return serialize([$this->varDir, $this->testCase, $this->rootConfig, $this->getEnvironment(), $this->isDebug()]);
     }
 
     public function unserialize($str)
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AutowiringTypes/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AutowiringTypes/bundles.php
index 68e5afb125..535a4bf517 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AutowiringTypes/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/AutowiringTypes/bundles.php
@@ -9,8 +9,8 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\AutowiringBundle\AutowiringBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/CsrfFormLogin/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/CsrfFormLogin/bundles.php
index c16ab12f65..65a38200e7 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/CsrfFormLogin/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/CsrfFormLogin/bundles.php
@@ -9,9 +9,9 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\TwigBundle\TwigBundle(),
     new Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\CsrfFormLoginBundle\CsrfFormLoginBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/FirewallEntryPoint/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/FirewallEntryPoint/bundles.php
index 412e1c5d09..7928a468da 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/FirewallEntryPoint/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/FirewallEntryPoint/bundles.php
@@ -9,8 +9,8 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\FirewallEntryPointBundle\FirewallEntryPointBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLogin/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLogin/bundles.php
index 470ffff088..7dbd6e4380 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLogin/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLogin/bundles.php
@@ -9,9 +9,9 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
     new Symfony\Bundle\TwigBundle\TwigBundle(),
     new Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\JsonLoginBundle\JsonLoginBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLoginLdap/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLoginLdap/bundles.php
index 336bd003a2..e3aef52a2e 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLoginLdap/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/JsonLoginLdap/bundles.php
@@ -9,8 +9,8 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
     new Symfony\Bundle\TwigBundle\TwigBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutAccess/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutAccess/bundles.php
index c934b52aee..9a26fb163a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutAccess/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutAccess/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutWithoutSessionInvalidation/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutWithoutSessionInvalidation/bundles.php
index c934b52aee..9a26fb163a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutWithoutSessionInvalidation/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/LogoutWithoutSessionInvalidation/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/MissingUserProvider/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/MissingUserProvider/bundles.php
index 4c22e9d664..ccff0d356c 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/MissingUserProvider/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/MissingUserProvider/bundles.php
@@ -13,8 +13,8 @@ use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\MissingUserProviderBundle\MissingUserProviderBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
     new MissingUserProviderBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/PasswordEncode/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/PasswordEncode/bundles.php
index 2e9243712c..bcfd17425c 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/PasswordEncode/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/PasswordEncode/bundles.php
@@ -9,7 +9,7 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     new Symfony\Bundle\SecurityBundle\SecurityBundle(),
     new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/RememberMeLogout/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/RememberMeLogout/bundles.php
index c934b52aee..9a26fb163a 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/RememberMeLogout/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/RememberMeLogout/bundles.php
@@ -12,7 +12,7 @@
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/SecurityHelper/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/SecurityHelper/bundles.php
index 05df5ef680..181618ba99 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/SecurityHelper/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/SecurityHelper/bundles.php
@@ -13,8 +13,8 @@ use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
     new TwigBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/StandardFormLogin/bundles.php b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/StandardFormLogin/bundles.php
index 3424c1eed1..95041e7ad4 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/StandardFormLogin/bundles.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Functional/app/StandardFormLogin/bundles.php
@@ -14,9 +14,9 @@ use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\SecurityBundle\Tests\Functional\Bundle\FormLoginBundle\FormLoginBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 
-return array(
+return [
     new FrameworkBundle(),
     new SecurityBundle(),
     new TwigBundle(),
     new FormLoginBundle(),
-);
+];
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallConfigTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallConfigTest.php
index 4abf33e276..99e897aa8f 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallConfigTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallConfigTest.php
@@ -18,8 +18,8 @@ class FirewallConfigTest extends TestCase
 {
     public function testGetters()
     {
-        $listeners = array('logout', 'remember_me', 'anonymous');
-        $options = array(
+        $listeners = ['logout', 'remember_me', 'anonymous'];
+        $options = [
             'request_matcher' => 'foo_request_matcher',
             'security' => false,
             'stateless' => false,
@@ -29,8 +29,8 @@ class FirewallConfigTest extends TestCase
             'access_denied_url' => 'foo_access_denied_url',
             'access_denied_handler' => 'foo_access_denied_handler',
             'user_checker' => 'foo_user_checker',
-            'switch_user' => array('provider' => null, 'parameter' => '_switch_user', 'role' => 'ROLE_ALLOWED_TO_SWITCH'),
-        );
+            'switch_user' => ['provider' => null, 'parameter' => '_switch_user', 'role' => 'ROLE_ALLOWED_TO_SWITCH'],
+        ];
 
         $config = new FirewallConfig(
             'foo_firewall',
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallContextTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallContextTest.php
index fc2fbcc023..b65b8af4e9 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallContextTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallContextTest.php
@@ -25,12 +25,12 @@ class FirewallContextTest extends TestCase
         $config = new FirewallConfig('main', 'user_checker', 'request_matcher');
         $exceptionListener = $this->getExceptionListenerMock();
         $logoutListener = $this->getLogoutListenerMock();
-        $listeners = array(
+        $listeners = [
             $this
                 ->getMockBuilder(ListenerInterface::class)
                 ->disableOriginalConstructor()
                 ->getMock(),
-        );
+        ];
 
         $context = new FirewallContext($listeners, $exceptionListener, $logoutListener, $config);
 
@@ -46,7 +46,7 @@ class FirewallContextTest extends TestCase
      */
     public function testFirewallConfigAs3rdConstructorArgument()
     {
-        new FirewallContext(array(), $this->getExceptionListenerMock(), new FirewallConfig('main', 'user_checker', 'request_matcher'));
+        new FirewallContext([], $this->getExceptionListenerMock(), new FirewallConfig('main', 'user_checker', 'request_matcher'));
     }
 
     private function getExceptionListenerMock()
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallMapTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallMapTest.php
index 42162369cb..bfcac0f81b 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallMapTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/Security/FirewallMapTest.php
@@ -30,13 +30,13 @@ class FirewallMapTest extends TestCase
     {
         $request = new Request();
 
-        $map = array();
+        $map = [];
         $container = $this->getMockBuilder(Container::class)->getMock();
         $container->expects($this->never())->method('get');
 
         $firewallMap = new FirewallMap($container, $map);
 
-        $this->assertEquals(array(array(), null, null), $firewallMap->getListeners($request));
+        $this->assertEquals([[], null, null], $firewallMap->getListeners($request));
         $this->assertNull($firewallMap->getFirewallConfig($request));
         $this->assertFalse($request->attributes->has(self::ATTRIBUTE_FIREWALL_CONTEXT));
     }
@@ -46,13 +46,13 @@ class FirewallMapTest extends TestCase
         $request = new Request();
         $request->attributes->set(self::ATTRIBUTE_FIREWALL_CONTEXT, 'foo');
 
-        $map = array();
+        $map = [];
         $container = $this->getMockBuilder(Container::class)->getMock();
         $container->expects($this->never())->method('get');
 
         $firewallMap = new FirewallMap($container, $map);
 
-        $this->assertEquals(array(array(), null, null), $firewallMap->getListeners($request));
+        $this->assertEquals([[], null, null], $firewallMap->getListeners($request));
         $this->assertNull($firewallMap->getFirewallConfig($request));
         $this->assertFalse($request->attributes->has(self::ATTRIBUTE_FIREWALL_CONTEXT));
     }
@@ -67,7 +67,7 @@ class FirewallMapTest extends TestCase
         $firewallContext->expects($this->once())->method('getConfig')->willReturn($firewallConfig);
 
         $listener = $this->getMockBuilder(ListenerInterface::class)->getMock();
-        $firewallContext->expects($this->once())->method('getListeners')->willReturn(array($listener));
+        $firewallContext->expects($this->once())->method('getListeners')->willReturn([$listener]);
 
         $exceptionListener = $this->getMockBuilder(ExceptionListener::class)->disableOriginalConstructor()->getMock();
         $firewallContext->expects($this->once())->method('getExceptionListener')->willReturn($exceptionListener);
@@ -84,9 +84,9 @@ class FirewallMapTest extends TestCase
         $container = $this->getMockBuilder(Container::class)->getMock();
         $container->expects($this->exactly(2))->method('get')->willReturn($firewallContext);
 
-        $firewallMap = new FirewallMap($container, array('security.firewall.map.context.foo' => $matcher));
+        $firewallMap = new FirewallMap($container, ['security.firewall.map.context.foo' => $matcher]);
 
-        $this->assertEquals(array(array($listener), $exceptionListener, $logoutListener), $firewallMap->getListeners($request));
+        $this->assertEquals([[$listener], $exceptionListener, $logoutListener], $firewallMap->getListeners($request));
         $this->assertEquals($firewallConfig, $firewallMap->getFirewallConfig($request));
         $this->assertEquals('security.firewall.map.context.foo', $request->attributes->get(self::ATTRIBUTE_FIREWALL_CONTEXT));
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/Tests/SecurityUserValueResolverTest.php b/src/Symfony/Bundle/SecurityBundle/Tests/SecurityUserValueResolverTest.php
index d26708ae08..d015165739 100644
--- a/src/Symfony/Bundle/SecurityBundle/Tests/SecurityUserValueResolverTest.php
+++ b/src/Symfony/Bundle/SecurityBundle/Tests/SecurityUserValueResolverTest.php
@@ -69,7 +69,7 @@ class SecurityUserValueResolverTest extends TestCase
         $metadata = new ArgumentMetadata('foo', UserInterface::class, false, false, null);
 
         $this->assertTrue($resolver->supports(Request::create('/'), $metadata));
-        $this->assertSame(array($user), iterator_to_array($resolver->resolve(Request::create('/'), $metadata)));
+        $this->assertSame([$user], iterator_to_array($resolver->resolve(Request::create('/'), $metadata)));
     }
 
     public function testIntegration()
@@ -80,8 +80,8 @@ class SecurityUserValueResolverTest extends TestCase
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken($token);
 
-        $argumentResolver = new ArgumentResolver(null, array(new SecurityUserValueResolver($tokenStorage)));
-        $this->assertSame(array($user), $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user) {}));
+        $argumentResolver = new ArgumentResolver(null, [new SecurityUserValueResolver($tokenStorage)]);
+        $this->assertSame([$user], $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user) {}));
     }
 
     public function testIntegrationNoUser()
@@ -90,8 +90,8 @@ class SecurityUserValueResolverTest extends TestCase
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken($token);
 
-        $argumentResolver = new ArgumentResolver(null, array(new SecurityUserValueResolver($tokenStorage), new DefaultValueResolver()));
-        $this->assertSame(array(null), $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user = null) {}));
+        $argumentResolver = new ArgumentResolver(null, [new SecurityUserValueResolver($tokenStorage), new DefaultValueResolver()]);
+        $this->assertSame([null], $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user = null) {}));
     }
 }
 
diff --git a/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheCacheWarmer.php b/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheCacheWarmer.php
index 00964322e9..03233c5985 100644
--- a/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheCacheWarmer.php
+++ b/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheCacheWarmer.php
@@ -37,7 +37,7 @@ class TemplateCacheCacheWarmer implements CacheWarmerInterface, ServiceSubscribe
     /**
      * @param array $paths Additional twig paths to warm
      */
-    public function __construct(ContainerInterface $container, TemplateFinderInterface $finder = null, array $paths = array())
+    public function __construct(ContainerInterface $container, TemplateFinderInterface $finder = null, array $paths = [])
     {
         // We don't inject the Twig environment directly as it depends on the
         // template locator (via the loader) which might be a cached one.
@@ -96,9 +96,9 @@ class TemplateCacheCacheWarmer implements CacheWarmerInterface, ServiceSubscribe
      */
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'twig' => Environment::class,
-        );
+        ];
     }
 
     /**
@@ -112,10 +112,10 @@ class TemplateCacheCacheWarmer implements CacheWarmerInterface, ServiceSubscribe
     private function findTemplatesInFolder($namespace, $dir)
     {
         if (!is_dir($dir)) {
-            return array();
+            return [];
         }
 
-        $templates = array();
+        $templates = [];
         $finder = new Finder();
 
         foreach ($finder->files()->followLinks()->in($dir) as $file) {
diff --git a/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheWarmer.php b/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheWarmer.php
index cdd3a5d740..cb9af8a462 100644
--- a/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheWarmer.php
+++ b/src/Symfony/Bundle/TwigBundle/CacheWarmer/TemplateCacheWarmer.php
@@ -67,8 +67,8 @@ class TemplateCacheWarmer implements CacheWarmerInterface, ServiceSubscriberInte
      */
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             'twig' => Environment::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php b/src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php
index 8cd7fa18bc..5269a49de8 100644
--- a/src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php
+++ b/src/Symfony/Bundle/TwigBundle/Controller/ExceptionController.php
@@ -61,14 +61,14 @@ class ExceptionController
 
         return new Response($this->twig->render(
             (string) $this->findTemplate($request, $request->getRequestFormat(), $code, $showException),
-            array(
+            [
                 'status_code' => $code,
                 'status_text' => isset(Response::$statusTexts[$code]) ? Response::$statusTexts[$code] : '',
                 'exception' => $exception,
                 'logger' => $logger,
                 'currentContent' => $currentContent,
-            )
-        ), 200, array('Content-Type' => $request->getMimeType($request->getRequestFormat()) ?: 'text/html'));
+            ]
+        ), 200, ['Content-Type' => $request->getMimeType($request->getRequestFormat()) ?: 'text/html']);
     }
 
     /**
diff --git a/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php b/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
index a8b25adcf0..c529cfbb46 100644
--- a/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
+++ b/src/Symfony/Bundle/TwigBundle/Controller/PreviewErrorController.php
@@ -43,13 +43,13 @@ class PreviewErrorController
          * the additional "showException" flag.
          */
 
-        $subRequest = $request->duplicate(null, null, array(
+        $subRequest = $request->duplicate(null, null, [
             '_controller' => $this->controller,
             'exception' => $exception,
             'logger' => null,
             'format' => $request->getRequestFormat(),
             'showException' => false,
-        ));
+        ]);
 
         return $this->kernel->handle($subRequest, HttpKernelInterface::SUB_REQUEST);
     }
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
index 5089fc0651..79a6ad9ae8 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php
@@ -45,7 +45,7 @@ class ExtensionPass implements CompilerPassInterface
             $reflClass = new \ReflectionClass('Symfony\Bridge\Twig\Extension\FormExtension');
 
             $coreThemePath = \dirname(\dirname($reflClass->getFileName())).'/Resources/views/Form';
-            $container->getDefinition('twig.loader.native_filesystem')->addMethodCall('addPath', array($coreThemePath));
+            $container->getDefinition('twig.loader.native_filesystem')->addMethodCall('addPath', [$coreThemePath]);
 
             $paths = $container->getDefinition('twig.template_iterator')->getArgument(2);
             $paths[$coreThemePath] = null;
@@ -67,9 +67,9 @@ class ExtensionPass implements CompilerPassInterface
             $container->getDefinition('twig.runtime.httpkernel')->addTag('twig.runtime');
 
             // inject Twig in the hinclude service if Twig is the only registered templating engine
-            if ((!$container->hasParameter('templating.engines') || array('twig') == $container->getParameter('templating.engines')) && $container->hasDefinition('fragment.renderer.hinclude')) {
+            if ((!$container->hasParameter('templating.engines') || ['twig'] == $container->getParameter('templating.engines')) && $container->hasDefinition('fragment.renderer.hinclude')) {
                 $container->getDefinition('fragment.renderer.hinclude')
-                    ->addTag('kernel.fragment_renderer', array('alias' => 'hinclude'))
+                    ->addTag('kernel.fragment_renderer', ['alias' => 'hinclude'])
                     ->replaceArgument(0, new Reference('twig'))
                 ;
             }
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/RuntimeLoaderPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/RuntimeLoaderPass.php
index bd6393bc9c..82cf1c145a 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/RuntimeLoaderPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/RuntimeLoaderPass.php
@@ -28,7 +28,7 @@ class RuntimeLoaderPass implements CompilerPassInterface
         }
 
         $definition = $container->getDefinition('twig.runtime_loader');
-        $mapping = array();
+        $mapping = [];
         foreach ($container->findTaggedServiceIds('twig.runtime', true) as $id => $attributes) {
             $def = $container->getDefinition($id);
             $mapping[$def->getClass()] = new Reference($id);
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigEnvironmentPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigEnvironmentPass.php
index c6dc157dee..a17d3facb6 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigEnvironmentPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigEnvironmentPass.php
@@ -37,10 +37,10 @@ class TwigEnvironmentPass implements CompilerPassInterface
         // afterward. If not, the globals from the extensions will never
         // be registered.
         $currentMethodCalls = $definition->getMethodCalls();
-        $twigBridgeExtensionsMethodCalls = array();
-        $othersExtensionsMethodCalls = array();
+        $twigBridgeExtensionsMethodCalls = [];
+        $othersExtensionsMethodCalls = [];
         foreach ($this->findAndSortTaggedServices('twig.extension', $container) as $extension) {
-            $methodCall = array('addExtension', array($extension));
+            $methodCall = ['addExtension', [$extension]];
             $extensionClass = $container->getDefinition((string) $extension)->getClass();
 
             if (\is_string($extensionClass) && 0 === strpos($extensionClass, 'Symfony\Bridge\Twig\Extension')) {
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigLoaderPass.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigLoaderPass.php
index 3fc2696904..51b6d9b4f0 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigLoaderPass.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/TwigLoaderPass.php
@@ -29,7 +29,7 @@ class TwigLoaderPass implements CompilerPassInterface
             return;
         }
 
-        $prioritizedLoaders = array();
+        $prioritizedLoaders = [];
         $found = 0;
 
         foreach ($container->findTaggedServiceIds('twig.loader', true) as $id => $attributes) {
@@ -50,7 +50,7 @@ class TwigLoaderPass implements CompilerPassInterface
 
             foreach ($prioritizedLoaders as $loaders) {
                 foreach ($loaders as $loader) {
-                    $chainLoader->addMethodCall('addLoader', array(new Reference($loader)));
+                    $chainLoader->addMethodCall('addLoader', [new Reference($loader)]);
                 }
             }
 
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
index 1ed2272e56..b635a752ab 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/Configuration.php
@@ -54,11 +54,11 @@ class Configuration implements ConfigurationInterface
                 ->arrayNode('form_themes')
                     ->addDefaultChildrenIfNoneSet()
                     ->prototype('scalar')->defaultValue('form_div_layout.html.twig')->end()
-                    ->example(array('@My/form.html.twig'))
+                    ->example(['@My/form.html.twig'])
                     ->validate()
                         ->ifTrue(function ($v) { return !\in_array('form_div_layout.html.twig', $v); })
                         ->then(function ($v) {
-                            return array_merge(array('form_div_layout.html.twig'), $v);
+                            return array_merge(['form_div_layout.html.twig'], $v);
                         })
                     ->end()
                 ->end()
@@ -74,7 +74,7 @@ class Configuration implements ConfigurationInterface
                 ->arrayNode('globals')
                     ->normalizeKeys(false)
                     ->useAttributeAsKey('key')
-                    ->example(array('foo' => '"@bar"', 'pi' => 3.14))
+                    ->example(['foo' => '"@bar"', 'pi' => 3.14])
                     ->prototype('array')
                         ->normalizeKeys(false)
                         ->beforeNormalization()
@@ -84,7 +84,7 @@ class Configuration implements ConfigurationInterface
                                     return substr($v, 1);
                                 }
 
-                                return array('id' => substr($v, 1), 'type' => 'service');
+                                return ['id' => substr($v, 1), 'type' => 'service'];
                             })
                         ->end()
                         ->beforeNormalization()
@@ -93,18 +93,18 @@ class Configuration implements ConfigurationInterface
                                     $keys = array_keys($v);
                                     sort($keys);
 
-                                    return $keys !== array('id', 'type') && $keys !== array('value');
+                                    return $keys !== ['id', 'type'] && $keys !== ['value'];
                                 }
 
                                 return true;
                             })
-                            ->then(function ($v) { return array('value' => $v); })
+                            ->then(function ($v) { return ['value' => $v]; })
                         ->end()
                         ->children()
                             ->scalarNode('id')->end()
                             ->scalarNode('type')
                                 ->validate()
-                                    ->ifNotInArray(array('service'))
+                                    ->ifNotInArray(['service'])
                                     ->thenInvalid('The %s type is not supported')
                                 ->end()
                             ->end()
@@ -147,7 +147,7 @@ class Configuration implements ConfigurationInterface
                     ->beforeNormalization()
                         ->always()
                         ->then(function ($paths) {
-                            $normalized = array();
+                            $normalized = [];
                             foreach ($paths as $path => $namespace) {
                                 if (\is_array($namespace)) {
                                     // xml
diff --git a/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php b/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
index fbe05fd818..a9db7bf6a8 100644
--- a/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
+++ b/src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php
@@ -57,10 +57,10 @@ class TwigExtension extends Extension
             if (isset($config['globals'])) {
                 foreach ($config['globals'] as $name => $value) {
                     if (\is_array($value) && isset($value['key'])) {
-                        $configs[$key]['globals'][$name] = array(
+                        $configs[$key]['globals'][$name] = [
                             'key' => $name,
                             'value' => $value,
-                        );
+                        ];
                     }
                 }
             }
@@ -93,9 +93,9 @@ class TwigExtension extends Extension
         // register user-configured paths
         foreach ($config['paths'] as $path => $namespace) {
             if (!$namespace) {
-                $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($path));
+                $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$path]);
             } else {
-                $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($path, $namespace));
+                $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$path, $namespace]);
             }
         }
 
@@ -106,12 +106,12 @@ class TwigExtension extends Extension
         foreach ($this->getBundleTemplatePaths($container, $config) as $name => $paths) {
             $namespace = $this->normalizeBundleName($name);
             foreach ($paths as $path) {
-                $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($path, $namespace));
+                $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$path, $namespace]);
             }
 
             if ($paths) {
                 // the last path must be the bundle views directory
-                $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($path, '!'.$namespace));
+                $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$path, '!'.$namespace]);
             }
         }
 
@@ -120,12 +120,12 @@ class TwigExtension extends Extension
                 @trigger_error(sprintf('Templates directory "%s" is deprecated since Symfony 4.2, use "%s" instead.', $dir, $defaultTwigPath), E_USER_DEPRECATED);
             }
 
-            $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($dir));
+            $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$dir]);
         }
         $container->addResource(new FileExistenceResource($dir));
 
         if (file_exists($defaultTwigPath)) {
-            $twigFilesystemLoaderDefinition->addMethodCall('addPath', array($defaultTwigPath));
+            $twigFilesystemLoaderDefinition->addMethodCall('addPath', [$defaultTwigPath]);
         }
         $container->addResource(new FileExistenceResource($defaultTwigPath));
 
@@ -133,9 +133,9 @@ class TwigExtension extends Extension
             $def = $container->getDefinition('twig');
             foreach ($config['globals'] as $key => $global) {
                 if (isset($global['type']) && 'service' === $global['type']) {
-                    $def->addMethodCall('addGlobal', array($key, new Reference($global['id'])));
+                    $def->addMethodCall('addGlobal', [$key, new Reference($global['id'])]);
                 } else {
-                    $def->addMethodCall('addGlobal', array($key, $global['value']));
+                    $def->addMethodCall('addGlobal', [$key, $global['value']]);
                 }
             }
         }
@@ -147,7 +147,7 @@ class TwigExtension extends Extension
         );
 
         if (isset($config['autoescape_service']) && isset($config['autoescape_service_method'])) {
-            $config['autoescape'] = array(new Reference($config['autoescape_service']), $config['autoescape_service_method']);
+            $config['autoescape'] = [new Reference($config['autoescape_service']), $config['autoescape_service_method']];
         }
         unset($config['autoescape_service'], $config['autoescape_service_method']);
 
@@ -167,7 +167,7 @@ class TwigExtension extends Extension
 
     private function getBundleTemplatePaths(ContainerBuilder $container, array $config)
     {
-        $bundleHierarchy = array();
+        $bundleHierarchy = [];
         foreach ($container->getParameter('kernel.bundles_metadata') as $name => $bundle) {
             $defaultOverrideBundlePath = $container->getParameterBag()->resolveValue($config['default_path']).'/bundles/'.$name;
 
diff --git a/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php b/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
index ff092c3d19..0f8b8b2720 100644
--- a/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
+++ b/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php
@@ -33,7 +33,7 @@ class FilesystemLoader extends BaseFilesystemLoader
      */
     public function __construct(FileLocatorInterface $locator, TemplateNameParserInterface $parser, string $rootPath = null)
     {
-        parent::__construct(array(), $rootPath);
+        parent::__construct([], $rootPath);
 
         $this->locator = $locator;
         $this->parser = $parser;
diff --git a/src/Symfony/Bundle/TwigBundle/TemplateIterator.php b/src/Symfony/Bundle/TwigBundle/TemplateIterator.php
index 1bbb4af6dc..17aca046f8 100644
--- a/src/Symfony/Bundle/TwigBundle/TemplateIterator.php
+++ b/src/Symfony/Bundle/TwigBundle/TemplateIterator.php
@@ -33,7 +33,7 @@ class TemplateIterator implements \IteratorAggregate
      * @param array           $paths       Additional Twig paths to warm
      * @param string          $defaultPath The directory where global templates can be stored
      */
-    public function __construct(KernelInterface $kernel, string $rootDir, array $paths = array(), string $defaultPath = null)
+    public function __construct(KernelInterface $kernel, string $rootDir, array $paths = [], string $defaultPath = null)
     {
         $this->kernel = $kernel;
         $this->rootDir = $rootDir;
@@ -52,7 +52,7 @@ class TemplateIterator implements \IteratorAggregate
 
         $this->templates = array_merge(
             $this->findTemplatesInDirectory($this->rootDir.'/Resources/views'),
-            $this->findTemplatesInDirectory($this->defaultPath, null, array('bundles'))
+            $this->findTemplatesInDirectory($this->defaultPath, null, ['bundles'])
         );
         foreach ($this->kernel->getBundles() as $bundle) {
             $name = $bundle->getName();
@@ -83,13 +83,13 @@ class TemplateIterator implements \IteratorAggregate
      *
      * @return array
      */
-    private function findTemplatesInDirectory($dir, $namespace = null, array $excludeDirs = array())
+    private function findTemplatesInDirectory($dir, $namespace = null, array $excludeDirs = [])
     {
         if (!is_dir($dir)) {
-            return array();
+            return [];
         }
 
-        $templates = array();
+        $templates = [];
         foreach (Finder::create()->files()->followLinks()->in($dir)->exclude($excludeDirs) as $file) {
             $templates[] = (null !== $namespace ? '@'.$namespace.'/' : '').str_replace('\\', '/', $file->getRelativePathname());
         }
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Controller/ExceptionControllerTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Controller/ExceptionControllerTest.php
index c58cf686f0..800da68c9b 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Controller/ExceptionControllerTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Controller/ExceptionControllerTest.php
@@ -22,7 +22,7 @@ class ExceptionControllerTest extends TestCase
 {
     public function testShowActionCanBeForcedToShowErrorPage()
     {
-        $twig = $this->createTwigEnv(array('@Twig/Exception/error404.html.twig' => '<html>not found</html>'));
+        $twig = $this->createTwigEnv(['@Twig/Exception/error404.html.twig' => '<html>not found</html>']);
 
         $request = $this->createRequest('html');
         $request->attributes->set('showException', false);
@@ -37,7 +37,7 @@ class ExceptionControllerTest extends TestCase
 
     public function testFallbackToHtmlIfNoTemplateForRequestedFormat()
     {
-        $twig = $this->createTwigEnv(array('@Twig/Exception/error.html.twig' => '<html></html>'));
+        $twig = $this->createTwigEnv(['@Twig/Exception/error.html.twig' => '<html></html>']);
 
         $request = $this->createRequest('txt');
         $exception = FlattenException::create(new \Exception());
@@ -50,7 +50,7 @@ class ExceptionControllerTest extends TestCase
 
     public function testFallbackToHtmlWithFullExceptionIfNoTemplateForRequestedFormatAndExceptionsShouldBeShown()
     {
-        $twig = $this->createTwigEnv(array('@Twig/Exception/exception_full.html.twig' => '<html></html>'));
+        $twig = $this->createTwigEnv(['@Twig/Exception/exception_full.html.twig' => '<html></html>']);
 
         $request = $this->createRequest('txt');
         $request->attributes->set('showException', true);
@@ -64,7 +64,7 @@ class ExceptionControllerTest extends TestCase
 
     public function testResponseHasRequestedMimeType()
     {
-        $twig = $this->createTwigEnv(array('@Twig/Exception/error.json.twig' => '{}'));
+        $twig = $this->createTwigEnv(['@Twig/Exception/error.json.twig' => '{}']);
 
         $request = $this->createRequest('json');
         $exception = FlattenException::create(new \Exception());
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
index 00c2217f07..539a952a60 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/ExtensionPassTest.php
@@ -30,12 +30,12 @@ class ExtensionPassTest extends TestCase
         $container->register('twig.extension.expression');
 
         $nativeTwigLoader = new Definition('\Twig\Loader\FilesystemLoader');
-        $nativeTwigLoader->addMethodCall('addPath', array());
+        $nativeTwigLoader->addMethodCall('addPath', []);
         $container->setDefinition('twig.loader.native_filesystem', $nativeTwigLoader);
 
         $filesystemLoader = new Definition('\Symfony\Bundle\TwigBundle\Loader\FilesystemLoader');
-        $filesystemLoader->setArguments(array(null, null, null));
-        $filesystemLoader->addMethodCall('addPath', array());
+        $filesystemLoader->setArguments([null, null, null]);
+        $filesystemLoader->addMethodCall('addPath', []);
         $container->setDefinition('twig.loader.filesystem', $filesystemLoader);
 
         $extensionPass = new ExtensionPass();
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigEnvironmentPassTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigEnvironmentPassTest.php
index aa6aac2428..1500fd0951 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigEnvironmentPassTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigEnvironmentPassTest.php
@@ -29,11 +29,11 @@ class TwigEnvironmentPassTest extends TestCase
         $pass = new TwigEnvironmentPass();
 
         $definition = new Definition('test_extension_1');
-        $definition->addTag('twig.extension', array('priority' => 100));
+        $definition->addTag('twig.extension', ['priority' => 100]);
         $builder->setDefinition('test_extension_1', $definition);
 
         $definition = new Definition('test_extension_2');
-        $definition->addTag('twig.extension', array('priority' => 200));
+        $definition->addTag('twig.extension', ['priority' => 200]);
         $builder->setDefinition('test_extension_2', $definition);
 
         $pass->process($builder);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
index 621967a596..3b65273d6d 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Compiler/TwigLoaderPassTest.php
@@ -72,9 +72,9 @@ class TwigLoaderPassTest extends TestCase
     {
         $this->builder->setDefinition('twig.loader.chain', $this->chainLoader);
         $this->builder->register('test_loader_1')
-            ->addTag('twig.loader', array('priority' => 100));
+            ->addTag('twig.loader', ['priority' => 100]);
         $this->builder->register('test_loader_2')
-            ->addTag('twig.loader', array('priority' => 200));
+            ->addTag('twig.loader', ['priority' => 200]);
 
         $this->pass->process($this->builder);
 
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
index dfe045ce26..e479804b98 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -19,15 +19,15 @@ class ConfigurationTest extends TestCase
 {
     public function testDoNoDuplicateDefaultFormResources()
     {
-        $input = array(
+        $input = [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-            'form_themes' => array('form_div_layout.html.twig'),
-        );
+            'form_themes' => ['form_div_layout.html.twig'],
+        ];
 
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(), array($input));
+        $config = $processor->processConfiguration(new Configuration(), [$input]);
 
-        $this->assertEquals(array('form_div_layout.html.twig'), $config['form_themes']);
+        $this->assertEquals(['form_div_layout.html.twig'], $config['form_themes']);
     }
 
     /**
@@ -37,34 +37,34 @@ class ConfigurationTest extends TestCase
     public function testGetStrictVariablesDefaultFalse()
     {
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(), array(array()));
+        $config = $processor->processConfiguration(new Configuration(), [[]]);
 
         $this->assertFalse($config['strict_variables']);
     }
 
     public function testGlobalsAreNotNormalized()
     {
-        $input = array(
+        $input = [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-            'globals' => array('some-global' => true),
-        );
+            'globals' => ['some-global' => true],
+        ];
 
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(), array($input));
+        $config = $processor->processConfiguration(new Configuration(), [$input]);
 
-        $this->assertSame(array('some-global' => array('value' => true)), $config['globals']);
+        $this->assertSame(['some-global' => ['value' => true]], $config['globals']);
     }
 
     public function testArrayKeysInGlobalsAreNotNormalized()
     {
-        $input = array(
+        $input = [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-            'globals' => array('global' => array('some-key' => 'some-value')),
-        );
+            'globals' => ['global' => ['some-key' => 'some-value']],
+        ];
 
         $processor = new Processor();
-        $config = $processor->processConfiguration(new Configuration(), array($input));
+        $config = $processor->processConfiguration(new Configuration(), [$input]);
 
-        $this->assertSame(array('global' => array('value' => array('some-key' => 'some-value'))), $config['globals']);
+        $this->assertSame(['global' => ['value' => ['some-key' => 'some-value']]], $config['globals']);
     }
 }
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/customTemplateEscapingGuesser.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/customTemplateEscapingGuesser.php
index 5ef1256663..de55467d22 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/customTemplateEscapingGuesser.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/customTemplateEscapingGuesser.php
@@ -1,7 +1,7 @@
 <?php
 
-$container->loadFromExtension('twig', array(
+$container->loadFromExtension('twig', [
     'autoescape_service' => 'my_project.some_bundle.template_escaping_guesser',
     'autoescape_service_method' => 'guess',
     'strict_variables' => false, // to be removed in 5.0 relying on default
-));
+]);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/empty.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/empty.php
index 674c5d474c..76e66160f5 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/empty.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/empty.php
@@ -1,5 +1,5 @@
 <?php
 
-$container->loadFromExtension('twig', array(
+$container->loadFromExtension('twig', [
     'strict_variables' => false, // to be removed in 5.0 relying on default
-));
+]);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/extra.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/extra.php
index da234511b1..30c3428ef1 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/extra.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/extra.php
@@ -1,8 +1,8 @@
 <?php
 
-$container->loadFromExtension('twig', array(
-    'paths' => array(
+$container->loadFromExtension('twig', [
+    'paths' => [
         'namespaced_path3' => 'namespace3',
-    ),
+    ],
     'strict_variables' => false, // to be removed in 5.0 relying on default
-));
+]);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/formats.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/formats.php
index fe4f7c19c1..69fbf7c012 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/formats.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/formats.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('twig', array(
-    'date' => array(
+$container->loadFromExtension('twig', [
+    'date' => [
         'format' => 'Y-m-d',
         'interval_format' => '%d',
         'timezone' => 'Europe/Berlin',
-    ),
-    'number_format' => array(
+    ],
+    'number_format' => [
         'decimals' => 2,
         'decimal_point' => ',',
         'thousands_separator' => '.',
-    ),
+    ],
     'strict_variables' => false, // to be removed in 5.0 relying on default
-));
+]);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/full.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/full.php
index 47b9e5d835..8dd2be4096 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/full.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/Fixtures/php/full.php
@@ -1,15 +1,15 @@
 <?php
 
-$container->loadFromExtension('twig', array(
-    'form_themes' => array(
+$container->loadFromExtension('twig', [
+    'form_themes' => [
         'MyBundle::form.html.twig',
-    ),
-    'globals' => array(
+    ],
+    'globals' => [
         'foo' => '@bar',
         'baz' => '@@qux',
         'pi' => 3.14,
-        'bad' => array('key' => 'foo'),
-    ),
+        'bad' => ['key' => 'foo'],
+    ],
     'auto_reload' => true,
     'autoescape' => true,
     'base_template_class' => 'stdClass',
@@ -18,10 +18,10 @@ $container->loadFromExtension('twig', array(
     'debug' => true,
     'strict_variables' => true,
     'default_path' => '%kernel.project_dir%/Fixtures/templates',
-    'paths' => array(
+    'paths' => [
         'path1',
         'path2',
         'namespaced_path1' => 'namespace1',
         'namespaced_path2' => 'namespace2',
-    ),
-));
+    ],
+]);
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
index 3666ef6d33..0a227930bd 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/DependencyInjection/TwigExtensionTest.php
@@ -29,9 +29,9 @@ class TwigExtensionTest extends TestCase
     {
         $container = $this->createContainer();
         $container->registerExtension(new TwigExtension());
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-        ));
+        ]);
         $this->compileContainer($container);
 
         $this->assertEquals('Twig\Environment', $container->getDefinition('twig')->getClass(), '->load() loads the twig.xml file');
@@ -74,9 +74,9 @@ class TwigExtensionTest extends TestCase
         $this->assertEquals(3.14, $calls[4][1][1], '->load() registers variables as Twig globals');
 
         // Yaml and Php specific configs
-        if (\in_array($format, array('yml', 'php'))) {
+        if (\in_array($format, ['yml', 'php'])) {
             $this->assertEquals('bad', $calls[5][1][0], '->load() registers variables as Twig globals');
-            $this->assertEquals(array('key' => 'foo'), $calls[5][1][1], '->load() registers variables as Twig globals');
+            $this->assertEquals(['key' => 'foo'], $calls[5][1][1], '->load() registers variables as Twig globals');
         }
 
         // Twig options
@@ -101,7 +101,7 @@ class TwigExtensionTest extends TestCase
         $this->compileContainer($container);
 
         $options = $container->getDefinition('twig')->getArgument(1);
-        $this->assertEquals(array(new Reference('my_project.some_bundle.template_escaping_guesser'), 'guess'), $options['autoescape']);
+        $this->assertEquals([new Reference('my_project.some_bundle.template_escaping_guesser'), 'guess'], $options['autoescape']);
     }
 
     /**
@@ -140,8 +140,8 @@ class TwigExtensionTest extends TestCase
 
     public function testGlobalsWithDifferentTypesAndValues()
     {
-        $globals = array(
-            'array' => array(),
+        $globals = [
+            'array' => [],
             'false' => false,
             'float' => 2.0,
             'integer' => 3,
@@ -149,14 +149,14 @@ class TwigExtensionTest extends TestCase
             'object' => new \stdClass(),
             'string' => 'foo',
             'true' => true,
-        );
+        ];
 
         $container = $this->createContainer();
         $container->registerExtension(new TwigExtension());
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'globals' => $globals,
             'strict_variables' => false, // // to be removed in 5.0 relying on default
-        ));
+        ]);
         $this->compileContainer($container);
 
         $calls = $container->getDefinition('twig')->getMethodCalls();
@@ -180,24 +180,24 @@ class TwigExtensionTest extends TestCase
         $this->compileContainer($container);
 
         $def = $container->getDefinition('twig.loader.native_filesystem');
-        $paths = array();
+        $paths = [];
         foreach ($def->getMethodCalls() as $call) {
             if ('addPath' === $call[0] && false === strpos($call[1][0], 'Form')) {
                 $paths[] = $call[1];
             }
         }
 
-        $this->assertEquals(array(
-            array('path1'),
-            array('path2'),
-            array('namespaced_path1', 'namespace1'),
-            array('namespaced_path2', 'namespace2'),
-            array('namespaced_path3', 'namespace3'),
-            array(__DIR__.'/Fixtures/templates/bundles/TwigBundle', 'Twig'),
-            array(realpath(__DIR__.'/../..').'/Resources/views', 'Twig'),
-            array(realpath(__DIR__.'/../..').'/Resources/views', '!Twig'),
-            array(__DIR__.'/Fixtures/templates'),
-        ), $paths);
+        $this->assertEquals([
+            ['path1'],
+            ['path2'],
+            ['namespaced_path1', 'namespace1'],
+            ['namespaced_path2', 'namespace2'],
+            ['namespaced_path3', 'namespace3'],
+            [__DIR__.'/Fixtures/templates/bundles/TwigBundle', 'Twig'],
+            [realpath(__DIR__.'/../..').'/Resources/views', 'Twig'],
+            [realpath(__DIR__.'/../..').'/Resources/views', '!Twig'],
+            [__DIR__.'/Fixtures/templates'],
+        ], $paths);
     }
 
     /**
@@ -215,35 +215,35 @@ class TwigExtensionTest extends TestCase
         $this->compileContainer($container);
 
         $def = $container->getDefinition('twig.loader.native_filesystem');
-        $paths = array();
+        $paths = [];
         foreach ($def->getMethodCalls() as $call) {
             if ('addPath' === $call[0] && false === strpos($call[1][0], 'Form')) {
                 $paths[] = $call[1];
             }
         }
 
-        $this->assertEquals(array(
-            array('path1'),
-            array('path2'),
-            array('namespaced_path1', 'namespace1'),
-            array('namespaced_path2', 'namespace2'),
-            array('namespaced_path3', 'namespace3'),
-            array(__DIR__.'/../Fixtures/templates/Resources/TwigBundle/views', 'Twig'),
-            array(__DIR__.'/Fixtures/templates/bundles/TwigBundle', 'Twig'),
-            array(realpath(__DIR__.'/../..').'/Resources/views', 'Twig'),
-            array(realpath(__DIR__.'/../..').'/Resources/views', '!Twig'),
-            array(__DIR__.'/../Fixtures/templates/Resources/views'),
-            array(__DIR__.'/Fixtures/templates'),
-        ), $paths);
+        $this->assertEquals([
+            ['path1'],
+            ['path2'],
+            ['namespaced_path1', 'namespace1'],
+            ['namespaced_path2', 'namespace2'],
+            ['namespaced_path3', 'namespace3'],
+            [__DIR__.'/../Fixtures/templates/Resources/TwigBundle/views', 'Twig'],
+            [__DIR__.'/Fixtures/templates/bundles/TwigBundle', 'Twig'],
+            [realpath(__DIR__.'/../..').'/Resources/views', 'Twig'],
+            [realpath(__DIR__.'/../..').'/Resources/views', '!Twig'],
+            [__DIR__.'/../Fixtures/templates/Resources/views'],
+            [__DIR__.'/Fixtures/templates'],
+        ], $paths);
     }
 
     public function getFormats()
     {
-        return array(
-            array('php'),
-            array('yml'),
-            array('xml'),
-        );
+        return [
+            ['php'],
+            ['yml'],
+            ['xml'],
+        ];
     }
 
     /**
@@ -257,9 +257,9 @@ class TwigExtensionTest extends TestCase
             $container->register('debug.stopwatch', 'Symfony\Component\Stopwatch\Stopwatch');
         }
         $container->registerExtension(new TwigExtension());
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-        ));
+        ]);
         $container->setAlias('test.twig.extension.debug.stopwatch', 'twig.extension.debug.stopwatch')->setPublic(true);
         $this->compileContainer($container);
 
@@ -272,21 +272,21 @@ class TwigExtensionTest extends TestCase
 
     public function stopwatchExtensionAvailabilityProvider()
     {
-        return array(
-            'debug-and-stopwatch-enabled' => array(true, true, true),
-            'only-stopwatch-enabled' => array(false, true, false),
-            'only-debug-enabled' => array(true, false, false),
-            'debug-and-stopwatch-disabled' => array(false, false, false),
-        );
+        return [
+            'debug-and-stopwatch-enabled' => [true, true, true],
+            'only-stopwatch-enabled' => [false, true, false],
+            'only-debug-enabled' => [true, false, false],
+            'debug-and-stopwatch-disabled' => [false, false, false],
+        ];
     }
 
     public function testRuntimeLoader()
     {
         $container = $this->createContainer();
         $container->registerExtension(new TwigExtension());
-        $container->loadFromExtension('twig', array(
+        $container->loadFromExtension('twig', [
             'strict_variables' => false, // to be removed in 5.0 relying on default
-        ));
+        ]);
         $container->setParameter('kernel.environment', 'test');
         $container->setParameter('debug.file_link_format', 'test');
         $container->setParameter('foo', 'FooClass');
@@ -295,7 +295,7 @@ class TwigExtensionTest extends TestCase
         $container->register('templating.name_parser', 'FooClass');
         $container->register('foo', '%foo%')->addTag('twig.runtime');
         $container->addCompilerPass(new RuntimeLoaderPass(), PassConfig::TYPE_BEFORE_REMOVING);
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
         $container->compile();
 
         $loader = $container->getDefinition('twig.runtime_loader');
@@ -308,30 +308,30 @@ class TwigExtensionTest extends TestCase
 
     private function createContainer(string $rootDir = __DIR__.'/Fixtures')
     {
-        $container = new ContainerBuilder(new ParameterBag(array(
+        $container = new ContainerBuilder(new ParameterBag([
             'kernel.cache_dir' => __DIR__,
             'kernel.root_dir' => $rootDir,
             'kernel.project_dir' => __DIR__,
             'kernel.charset' => 'UTF-8',
             'kernel.debug' => false,
-            'kernel.bundles' => array(
+            'kernel.bundles' => [
                 'TwigBundle' => 'Symfony\\Bundle\\TwigBundle\\TwigBundle',
-            ),
-            'kernel.bundles_metadata' => array(
-                'TwigBundle' => array(
+            ],
+            'kernel.bundles_metadata' => [
+                'TwigBundle' => [
                     'namespace' => 'Symfony\\Bundle\\TwigBundle',
                     'path' => realpath(__DIR__.'/../..'),
-                ),
-            ),
-        )));
+                ],
+            ],
+        ]));
 
         return $container;
     }
 
     private function compileContainer(ContainerBuilder $container)
     {
-        $container->getCompilerPassConfig()->setOptimizationPasses(array());
-        $container->getCompilerPassConfig()->setRemovingPasses(array());
+        $container->getCompilerPassConfig()->setOptimizationPasses([]);
+        $container->getCompilerPassConfig()->setRemovingPasses([]);
         $container->compile();
     }
 
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
index 46d5446abd..c5999752d0 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Functional/CacheWarmingTest.php
@@ -83,31 +83,31 @@ class CacheWarmingKernel extends Kernel
 
     public function registerBundles()
     {
-        return array(new FrameworkBundle(), new TwigBundle());
+        return [new FrameworkBundle(), new TwigBundle()];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
     {
         $loader->load(function ($container) {
             $container
-                ->loadFromExtension('framework', array(
+                ->loadFromExtension('framework', [
                     'secret' => '$ecret',
-                    'form' => array('enabled' => false),
-                ))
-                ->loadFromExtension('twig', array( // to be removed in 5.0 relying on default
+                    'form' => ['enabled' => false],
+                ])
+                ->loadFromExtension('twig', [ // to be removed in 5.0 relying on default
                     'strict_variables' => false,
-                ))
+                ])
             ;
         });
 
         if ($this->withTemplating) {
             $loader->load(function ($container) {
-                $container->loadFromExtension('framework', array(
+                $container->loadFromExtension('framework', [
                     'secret' => '$ecret',
-                    'templating' => array('engines' => array('twig')),
-                    'router' => array('resource' => '%kernel.project_dir%/Resources/config/empty_routing.yml'),
-                    'form' => array('enabled' => false),
-                ));
+                    'templating' => ['engines' => ['twig']],
+                    'router' => ['resource' => '%kernel.project_dir%/Resources/config/empty_routing.yml'],
+                    'form' => ['enabled' => false],
+                ]);
             });
         }
     }
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Functional/EmptyAppTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Functional/EmptyAppTest.php
index 5d66e20f87..df90b23752 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Functional/EmptyAppTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Functional/EmptyAppTest.php
@@ -32,16 +32,16 @@ class EmptyAppKernel extends Kernel
 {
     public function registerBundles()
     {
-        return array(new TwigBundle());
+        return [new TwigBundle()];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
     {
         $loader->load(function ($container) {
             $container
-                ->loadFromExtension('twig', array( // to be removed in 5.0 relying on default
+                ->loadFromExtension('twig', [ // to be removed in 5.0 relying on default
                     'strict_variables' => false,
-                ))
+                ])
             ;
         });
     }
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php b/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
index 8c0495028a..f1e7709072 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/Functional/NoTemplatingEntryTest.php
@@ -55,21 +55,21 @@ class NoTemplatingEntryKernel extends Kernel
 {
     public function registerBundles()
     {
-        return array(new FrameworkBundle(), new TwigBundle());
+        return [new FrameworkBundle(), new TwigBundle()];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
     {
         $loader->load(function ($container) {
             $container
-                ->loadFromExtension('framework', array(
+                ->loadFromExtension('framework', [
                     'secret' => '$ecret',
-                    'form' => array('enabled' => false),
-                ))
-                ->loadFromExtension('twig', array(
+                    'form' => ['enabled' => false],
+                ])
+                ->loadFromExtension('twig', [
                     'strict_variables' => false, // to be removed in 5.0 relying on default
                     'default_path' => __DIR__.'/templates',
-                ))
+                ])
             ;
         });
     }
diff --git a/src/Symfony/Bundle/TwigBundle/Tests/TemplateIteratorTest.php b/src/Symfony/Bundle/TwigBundle/Tests/TemplateIteratorTest.php
index 04eb5e1878..33a873dba8 100644
--- a/src/Symfony/Bundle/TwigBundle/Tests/TemplateIteratorTest.php
+++ b/src/Symfony/Bundle/TwigBundle/Tests/TemplateIteratorTest.php
@@ -22,22 +22,22 @@ class TemplateIteratorTest extends TestCase
         $bundle->expects($this->any())->method('getPath')->will($this->returnValue(__DIR__.'/Fixtures/templates/BarBundle'));
 
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\Kernel')->disableOriginalConstructor()->getMock();
-        $kernel->expects($this->any())->method('getBundles')->will($this->returnValue(array(
+        $kernel->expects($this->any())->method('getBundles')->will($this->returnValue([
             $bundle,
-        )));
-        $iterator = new TemplateIterator($kernel, __DIR__.'/Fixtures/templates', array(__DIR__.'/Fixtures/templates/Foo' => 'Foo'), __DIR__.'/DependencyInjection/Fixtures/templates');
+        ]));
+        $iterator = new TemplateIterator($kernel, __DIR__.'/Fixtures/templates', [__DIR__.'/Fixtures/templates/Foo' => 'Foo'], __DIR__.'/DependencyInjection/Fixtures/templates');
 
         $sorted = iterator_to_array($iterator);
         sort($sorted);
         $this->assertEquals(
-            array(
+            [
                 '@Bar/base.html.twig',
                 '@Bar/index.html.twig',
                 '@Bar/layout.html.twig',
                 '@Foo/index.html.twig',
                 'layout.html.twig',
                 'sub/sub.html.twig',
-            ),
+            ],
             $sorted
         );
     }
diff --git a/src/Symfony/Bundle/TwigBundle/TwigEngine.php b/src/Symfony/Bundle/TwigBundle/TwigEngine.php
index 1ac56a6f59..39115199e5 100644
--- a/src/Symfony/Bundle/TwigBundle/TwigEngine.php
+++ b/src/Symfony/Bundle/TwigBundle/TwigEngine.php
@@ -39,7 +39,7 @@ class TwigEngine extends BaseEngine implements EngineInterface
     /**
      * {@inheritdoc}
      */
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
         try {
             return parent::render($name, $parameters);
@@ -63,7 +63,7 @@ class TwigEngine extends BaseEngine implements EngineInterface
      *
      * @throws Error if something went wrong like a thrown exception while rendering the template
      */
-    public function renderResponse($view, array $parameters = array(), Response $response = null)
+    public function renderResponse($view, array $parameters = [], Response $response = null)
     {
         if (null === $response) {
             $response = new Response();
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
index 47caadd01f..bc40f4f8dd 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/ExceptionController.php
@@ -63,21 +63,21 @@ class ExceptionController
         if (!$this->twig->getLoader()->exists($template)) {
             $handler = new ExceptionHandler($this->debug, $this->twig->getCharset(), $this->fileLinkFormat);
 
-            return new Response($handler->getContent($exception), 200, array('Content-Type' => 'text/html'));
+            return new Response($handler->getContent($exception), 200, ['Content-Type' => 'text/html']);
         }
 
         $code = $exception->getStatusCode();
 
         return new Response($this->twig->render(
             $template,
-            array(
+            [
                 'status_code' => $code,
                 'status_text' => Response::$statusTexts[$code],
                 'exception' => $exception,
                 'logger' => null,
                 'currentContent' => '',
-            )
-        ), 200, array('Content-Type' => 'text/html'));
+            ]
+        ), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -103,10 +103,10 @@ class ExceptionController
         if (!$this->templateExists($template)) {
             $handler = new ExceptionHandler($this->debug, $this->twig->getCharset(), $this->fileLinkFormat);
 
-            return new Response($handler->getStylesheet($exception), 200, array('Content-Type' => 'text/css'));
+            return new Response($handler->getStylesheet($exception), 200, ['Content-Type' => 'text/css']);
         }
 
-        return new Response($this->twig->render('@WebProfiler/Collector/exception.css.twig'), 200, array('Content-Type' => 'text/css'));
+        return new Response($this->twig->render('@WebProfiler/Collector/exception.css.twig'), 200, ['Content-Type' => 'text/css']);
     }
 
     protected function getTemplate()
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
index 82264f0a45..35cf31fbf9 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/ProfilerController.php
@@ -60,7 +60,7 @@ class ProfilerController
 
         $this->profiler->disable();
 
-        return new RedirectResponse($this->generator->generate('_profiler_search_results', array('token' => 'empty', 'limit' => 10)), 302, array('Content-Type' => 'text/html'));
+        return new RedirectResponse($this->generator->generate('_profiler_search_results', ['token' => 'empty', 'limit' => 10]), 302, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -93,14 +93,14 @@ class ProfilerController
         }
 
         if (!$profile = $this->profiler->loadProfile($token)) {
-            return new Response($this->twig->render('@WebProfiler/Profiler/info.html.twig', array('about' => 'no_token', 'token' => $token, 'request' => $request)), 200, array('Content-Type' => 'text/html'));
+            return new Response($this->twig->render('@WebProfiler/Profiler/info.html.twig', ['about' => 'no_token', 'token' => $token, 'request' => $request]), 200, ['Content-Type' => 'text/html']);
         }
 
         if (!$profile->hasCollector($panel)) {
             throw new NotFoundHttpException(sprintf('Panel "%s" is not available for token "%s".', $panel, $token));
         }
 
-        return new Response($this->twig->render($this->getTemplateManager()->getName($profile, $panel), array(
+        return new Response($this->twig->render($this->getTemplateManager()->getName($profile, $panel), [
             'token' => $token,
             'profile' => $profile,
             'collector' => $profile->getCollector($panel),
@@ -110,7 +110,7 @@ class ProfilerController
             'templates' => $this->getTemplateManager()->getNames($profile),
             'is_ajax' => $request->isXmlHttpRequest(),
             'profiler_markup_version' => 2, // 1 = original profiler, 2 = Symfony 2.8+ profiler
-        )), 200, array('Content-Type' => 'text/html'));
+        ]), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -135,30 +135,30 @@ class ProfilerController
         }
 
         if ('empty' === $token || null === $token) {
-            return new Response('', 200, array('Content-Type' => 'text/html'));
+            return new Response('', 200, ['Content-Type' => 'text/html']);
         }
 
         $this->profiler->disable();
 
         if (!$profile = $this->profiler->loadProfile($token)) {
-            return new Response('', 404, array('Content-Type' => 'text/html'));
+            return new Response('', 404, ['Content-Type' => 'text/html']);
         }
 
         $url = null;
         try {
-            $url = $this->generator->generate('_profiler', array('token' => $token));
+            $url = $this->generator->generate('_profiler', ['token' => $token]);
         } catch (\Exception $e) {
             // the profiler is not enabled
         }
 
-        return $this->renderWithCspNonces($request, '@WebProfiler/Profiler/toolbar.html.twig', array(
+        return $this->renderWithCspNonces($request, '@WebProfiler/Profiler/toolbar.html.twig', [
             'request' => $request,
             'profile' => $profile,
             'templates' => $this->getTemplateManager()->getNames($profile),
             'profiler_url' => $url,
             'token' => $token,
             'profiler_markup_version' => 2, // 1 = original toolbar, 2 = Symfony 2.8+ toolbar
-        ));
+        ]);
     }
 
     /**
@@ -203,7 +203,7 @@ class ProfilerController
         }
 
         return new Response(
-            $this->twig->render('@WebProfiler/Profiler/search.html.twig', array(
+            $this->twig->render('@WebProfiler/Profiler/search.html.twig', [
                 'token' => $token,
                 'ip' => $ip,
                 'method' => $method,
@@ -213,9 +213,9 @@ class ProfilerController
                 'end' => $end,
                 'limit' => $limit,
                 'request' => $request,
-            )),
+            ]),
             200,
-            array('Content-Type' => 'text/html')
+            ['Content-Type' => 'text/html']
         );
     }
 
@@ -251,7 +251,7 @@ class ProfilerController
         $end = $request->query->get('end', null);
         $limit = $request->query->get('limit');
 
-        return new Response($this->twig->render('@WebProfiler/Profiler/results.html.twig', array(
+        return new Response($this->twig->render('@WebProfiler/Profiler/results.html.twig', [
             'request' => $request,
             'token' => $token,
             'profile' => $profile,
@@ -264,7 +264,7 @@ class ProfilerController
             'end' => $end,
             'limit' => $limit,
             'panel' => null,
-        )), 200, array('Content-Type' => 'text/html'));
+        ]), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -305,12 +305,12 @@ class ProfilerController
         }
 
         if (!empty($token)) {
-            return new RedirectResponse($this->generator->generate('_profiler', array('token' => $token)), 302, array('Content-Type' => 'text/html'));
+            return new RedirectResponse($this->generator->generate('_profiler', ['token' => $token]), 302, ['Content-Type' => 'text/html']);
         }
 
         $tokens = $this->profiler->find($ip, $url, $limit, $method, $start, $end, $statusCode);
 
-        return new RedirectResponse($this->generator->generate('_profiler_search_results', array(
+        return new RedirectResponse($this->generator->generate('_profiler_search_results', [
             'token' => $tokens ? $tokens[0]['token'] : 'empty',
             'ip' => $ip,
             'method' => $method,
@@ -319,7 +319,7 @@ class ProfilerController
             'start' => $start,
             'end' => $end,
             'limit' => $limit,
-        )), 302, array('Content-Type' => 'text/html'));
+        ]), 302, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -345,7 +345,7 @@ class ProfilerController
         phpinfo();
         $phpinfo = ob_get_clean();
 
-        return new Response($phpinfo, 200, array('Content-Type' => 'text/html'));
+        return new Response($phpinfo, 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -374,11 +374,11 @@ class ProfilerController
             throw new NotFoundHttpException(sprintf('The file "%s" cannot be opened.', $file));
         }
 
-        return new Response($this->twig->render('@WebProfiler/Profiler/open.html.twig', array(
+        return new Response($this->twig->render('@WebProfiler/Profiler/open.html.twig', [
             'filename' => $filename,
             'file' => $file,
             'line' => $line,
-         )), 200, array('Content-Type' => 'text/html'));
+         ]), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -395,11 +395,11 @@ class ProfilerController
         return $this->templateManager;
     }
 
-    private function renderWithCspNonces(Request $request, $template, $variables, $code = 200, $headers = array('Content-Type' => 'text/html'))
+    private function renderWithCspNonces(Request $request, $template, $variables, $code = 200, $headers = ['Content-Type' => 'text/html'])
     {
         $response = new Response('', $code, $headers);
 
-        $nonces = $this->cspHandler ? $this->cspHandler->getNonces($request, $response) : array();
+        $nonces = $this->cspHandler ? $this->cspHandler->getNonces($request, $response) : [];
 
         $variables['csp_script_nonce'] = isset($nonces['csp_script_nonce']) ? $nonces['csp_script_nonce'] : null;
         $variables['csp_style_nonce'] = isset($nonces['csp_style_nonce']) ? $nonces['csp_style_nonce'] : null;
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Controller/RouterController.php b/src/Symfony/Bundle/WebProfilerBundle/Controller/RouterController.php
index 14e33a1107..f3f68fe5d8 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Controller/RouterController.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Controller/RouterController.php
@@ -60,7 +60,7 @@ class RouterController
         $this->profiler->disable();
 
         if (null === $this->matcher || null === $this->routes) {
-            return new Response('The Router is not enabled.', 200, array('Content-Type' => 'text/html'));
+            return new Response('The Router is not enabled.', 200, ['Content-Type' => 'text/html']);
         }
 
         $profile = $this->profiler->loadProfile($token);
@@ -68,11 +68,11 @@ class RouterController
         /** @var RequestDataCollector $request */
         $request = $profile->getCollector('request');
 
-        return new Response($this->twig->render('@WebProfiler/Router/panel.html.twig', array(
+        return new Response($this->twig->render('@WebProfiler/Router/panel.html.twig', [
             'request' => $request,
             'router' => $profile->getCollector('router'),
             'traces' => $this->getTraces($request, $profile->getMethod()),
-        )), 200, array('Content-Type' => 'text/html'));
+        ]), 200, ['Content-Type' => 'text/html']);
     }
 
     /**
@@ -83,9 +83,9 @@ class RouterController
         $traceRequest = Request::create(
             $request->getPathInfo(),
             $request->getRequestServer(true)->get('REQUEST_METHOD'),
-            array(),
+            [],
             $request->getRequestCookies(true)->all(),
-            array(),
+            [],
             $request->getRequestServer(true)->all()
         );
 
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php b/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
index df4458474b..a38e7c686f 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
@@ -44,23 +44,23 @@ class ContentSecurityPolicyHandler
     public function getNonces(Request $request, Response $response)
     {
         if ($request->headers->has('X-SymfonyProfiler-Script-Nonce') && $request->headers->has('X-SymfonyProfiler-Style-Nonce')) {
-            return array(
+            return [
                 'csp_script_nonce' => $request->headers->get('X-SymfonyProfiler-Script-Nonce'),
                 'csp_style_nonce' => $request->headers->get('X-SymfonyProfiler-Style-Nonce'),
-            );
+            ];
         }
 
         if ($response->headers->has('X-SymfonyProfiler-Script-Nonce') && $response->headers->has('X-SymfonyProfiler-Style-Nonce')) {
-            return array(
+            return [
                 'csp_script_nonce' => $response->headers->get('X-SymfonyProfiler-Script-Nonce'),
                 'csp_style_nonce' => $response->headers->get('X-SymfonyProfiler-Style-Nonce'),
-            );
+            ];
         }
 
-        $nonces = array(
+        $nonces = [
             'csp_script_nonce' => $this->generateNonce(),
             'csp_style_nonce' => $this->generateNonce(),
-        );
+        ];
 
         $response->headers->set('X-SymfonyProfiler-Script-Nonce', $nonces['csp_script_nonce']);
         $response->headers->set('X-SymfonyProfiler-Style-Nonce', $nonces['csp_style_nonce']);
@@ -88,7 +88,7 @@ class ContentSecurityPolicyHandler
         if ($this->cspDisabled) {
             $this->removeCspHeaders($response);
 
-            return array();
+            return [];
         }
 
         $nonces = $this->getNonces($request, $response);
@@ -116,19 +116,19 @@ class ContentSecurityPolicyHandler
      *
      * @return array
      */
-    private function updateCspHeaders(Response $response, array $nonces = array())
+    private function updateCspHeaders(Response $response, array $nonces = [])
     {
-        $nonces = array_replace(array(
+        $nonces = array_replace([
             'csp_script_nonce' => $this->generateNonce(),
             'csp_style_nonce' => $this->generateNonce(),
-        ), $nonces);
+        ], $nonces);
 
         $ruleIsSet = false;
 
         $headers = $this->getCspHeaders($response);
 
         foreach ($headers as $header => $directives) {
-            foreach (array('script-src' => 'csp_script_nonce', 'style-src' => 'csp_style_nonce') as $type => $tokenName) {
+            foreach (['script-src' => 'csp_script_nonce', 'style-src' => 'csp_style_nonce'] as $type => $tokenName) {
                 if ($this->authorizesInline($directives, $type)) {
                     continue;
                 }
@@ -192,7 +192,7 @@ class ContentSecurityPolicyHandler
      */
     private function parseDirectives($header)
     {
-        $directives = array();
+        $directives = [];
 
         foreach (explode(';', $header) as $directive) {
             $parts = explode(' ', trim($directive));
@@ -236,7 +236,7 @@ class ContentSecurityPolicyHandler
             if ('\'nonce-' === substr($directive, 0, 7)) {
                 return true;
             }
-            if (\in_array(substr($directive, 0, 8), array('\'sha256-', '\'sha384-', '\'sha512-'), true)) {
+            if (\in_array(substr($directive, 0, 8), ['\'sha256-', '\'sha384-', '\'sha512-'], true)) {
                 return true;
             }
         }
@@ -252,7 +252,7 @@ class ContentSecurityPolicyHandler
      */
     private function getCspHeaders(Response $response)
     {
-        $headers = array();
+        $headers = [];
 
         if ($response->headers->has('Content-Security-Policy')) {
             $headers['Content-Security-Policy'] = $this->parseDirectives($response->headers->get('Content-Security-Policy'));
diff --git a/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php b/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
index 64bcb3fdf6..4dd4438ed9 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/EventListener/WebDebugToolbarListener.php
@@ -67,7 +67,7 @@ class WebDebugToolbarListener implements EventSubscriberInterface
             try {
                 $response->headers->set(
                     'X-Debug-Token-Link',
-                    $this->urlGenerator->generate('_profiler', array('token' => $response->headers->get('X-Debug-Token')), UrlGeneratorInterface::ABSOLUTE_URL)
+                    $this->urlGenerator->generate('_profiler', ['token' => $response->headers->get('X-Debug-Token')], UrlGeneratorInterface::ABSOLUTE_URL)
                 );
             } catch (\Exception $e) {
                 $response->headers->set('X-Debug-Error', \get_class($e).': '.preg_replace('/\s+/', ' ', $e->getMessage()));
@@ -78,7 +78,7 @@ class WebDebugToolbarListener implements EventSubscriberInterface
             return;
         }
 
-        $nonces = $this->cspHandler ? $this->cspHandler->updateResponseHeaders($request, $response) : array();
+        $nonces = $this->cspHandler ? $this->cspHandler->updateResponseHeaders($request, $response) : [];
 
         // do not capture redirects or modify XML HTTP Requests
         if ($request->isXmlHttpRequest()) {
@@ -92,7 +92,7 @@ class WebDebugToolbarListener implements EventSubscriberInterface
                 $session->getFlashBag()->setAll($session->getFlashBag()->peekAll());
             }
 
-            $response->setContent($this->twig->render('@WebProfiler/Profiler/toolbar_redirect.html.twig', array('location' => $response->headers->get('Location'))));
+            $response->setContent($this->twig->render('@WebProfiler/Profiler/toolbar_redirect.html.twig', ['location' => $response->headers->get('Location')]));
             $response->setStatusCode(200);
             $response->headers->remove('Location');
         }
@@ -121,13 +121,13 @@ class WebDebugToolbarListener implements EventSubscriberInterface
         if (false !== $pos) {
             $toolbar = "\n".str_replace("\n", '', $this->twig->render(
                 '@WebProfiler/Profiler/toolbar_js.html.twig',
-                array(
+                [
                     'excluded_ajax_paths' => $this->excludedAjaxPaths,
                     'token' => $response->headers->get('X-Debug-Token'),
                     'request' => $request,
                     'csp_script_nonce' => isset($nonces['csp_script_nonce']) ? $nonces['csp_script_nonce'] : null,
                     'csp_style_nonce' => isset($nonces['csp_style_nonce']) ? $nonces['csp_style_nonce'] : null,
-                )
+                ]
             ))."\n";
             $content = substr($content, 0, $pos).$toolbar.substr($content, $pos);
             $response->setContent($content);
@@ -136,8 +136,8 @@ class WebDebugToolbarListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::RESPONSE => array('onKernelResponse', -128),
-        );
+        return [
+            KernelEvents::RESPONSE => ['onKernelResponse', -128],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Profiler/TemplateManager.php b/src/Symfony/Bundle/WebProfilerBundle/Profiler/TemplateManager.php
index 0c6ca6591d..fed7a6463b 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Profiler/TemplateManager.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Profiler/TemplateManager.php
@@ -69,7 +69,7 @@ class TemplateManager
      */
     public function getNames(Profile $profile)
     {
-        $templates = array();
+        $templates = [];
 
         foreach ($this->templates as $arguments) {
             if (null === $arguments) {
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
index f2dd791230..880d611fa6 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Controller/ProfilerControllerTest.php
@@ -32,7 +32,7 @@ class ProfilerControllerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $controller = new ProfilerController($urlGenerator, $profiler, $twig, array());
+        $controller = new ProfilerController($urlGenerator, $profiler, $twig, []);
 
         $response = $controller->toolbarAction(Request::create('/_wdt/empty'), $token);
         $this->assertEquals(200, $response->getStatusCode());
@@ -40,11 +40,11 @@ class ProfilerControllerTest extends TestCase
 
     public function getEmptyTokenCases()
     {
-        return array(
-            array(null),
+        return [
+            [null],
             // "empty" is also a valid empty token case, see https://github.com/symfony/symfony/issues/10806
-            array('empty'),
-        );
+            ['empty'],
+        ];
     }
 
     /**
@@ -59,10 +59,10 @@ class ProfilerControllerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $controller = new ProfilerController($urlGenerator, $profiler, $twig, array(), null, __DIR__.'/../..');
+        $controller = new ProfilerController($urlGenerator, $profiler, $twig, [], null, __DIR__.'/../..');
 
         try {
-            $response = $controller->openAction(Request::create('/_wdt/open', Request::METHOD_GET, array('file' => $path)));
+            $response = $controller->openAction(Request::create('/_wdt/open', Request::METHOD_GET, ['file' => $path]));
             $this->assertEquals(200, $response->getStatusCode());
             $this->assertTrue($isAllowed);
         } catch (NotFoundHttpException $e) {
@@ -72,15 +72,15 @@ class ProfilerControllerTest extends TestCase
 
     public function getOpenFileCases()
     {
-        return array(
-            array('README.md', true),
-            array('composer.json', true),
-            array('Controller/ProfilerController.php', true),
-            array('.gitignore', false),
-            array('../TwigBundle/README.md', false),
-            array('Controller/../README.md', false),
-            array('Controller/./ProfilerController.php', false),
-        );
+        return [
+            ['README.md', true],
+            ['composer.json', true],
+            ['Controller/ProfilerController.php', true],
+            ['.gitignore', false],
+            ['../TwigBundle/README.md', false],
+            ['Controller/../README.md', false],
+            ['Controller/./ProfilerController.php', false],
+        ];
     }
 
     /**
@@ -126,8 +126,8 @@ class ProfilerControllerTest extends TestCase
 
         $controller = $this->createController($profiler, $twig, $withCsp);
 
-        $tokens = array(
-            array(
+        $tokens = [
+            [
                 'token' => 'token1',
                 'ip' => '127.0.0.1',
                 'method' => 'GET',
@@ -135,8 +135,8 @@ class ProfilerControllerTest extends TestCase
                 'time' => 0,
                 'parent' => null,
                 'status_code' => 200,
-            ),
-            array(
+            ],
+            [
                 'token' => 'token2',
                 'ip' => '127.0.0.1',
                 'method' => 'GET',
@@ -144,23 +144,23 @@ class ProfilerControllerTest extends TestCase
                 'time' => 0,
                 'parent' => null,
                 'status_code' => 404,
-            ),
-        );
+            ],
+        ];
         $profiler
             ->expects($this->once())
             ->method('find')
             ->will($this->returnValue($tokens));
 
-        $request = Request::create('/_profiler/empty/search/results', 'GET', array(
+        $request = Request::create('/_profiler/empty/search/results', 'GET', [
             'limit' => 2,
             'ip' => '127.0.0.1',
             'method' => 'GET',
             'url' => 'http://example.com/',
-        ));
+        ]);
 
         $twig->expects($this->once())
             ->method('render')
-            ->with($this->stringEndsWith('results.html.twig'), $this->equalTo(array(
+            ->with($this->stringEndsWith('results.html.twig'), $this->equalTo([
                 'token' => 'empty',
                 'profile' => null,
                 'tokens' => $tokens,
@@ -173,7 +173,7 @@ class ProfilerControllerTest extends TestCase
                 'limit' => 2,
                 'panel' => null,
                 'request' => $request,
-            )));
+            ]));
 
         $response = $controller->searchResultsAction($request, 'empty');
         $this->assertEquals(200, $response->getStatusCode());
@@ -181,10 +181,10 @@ class ProfilerControllerTest extends TestCase
 
     public function provideCspVariants()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     private function createController($profiler, $twig, $withCSP)
@@ -194,9 +194,9 @@ class ProfilerControllerTest extends TestCase
         if ($withCSP) {
             $nonceGenerator = $this->getMockBuilder('Symfony\Bundle\WebProfilerBundle\Csp\NonceGenerator')->getMock();
 
-            return new ProfilerController($urlGenerator, $profiler, $twig, array(), new ContentSecurityPolicyHandler($nonceGenerator));
+            return new ProfilerController($urlGenerator, $profiler, $twig, [], new ContentSecurityPolicyHandler($nonceGenerator));
         }
 
-        return new ProfilerController($urlGenerator, $profiler, $twig, array());
+        return new ProfilerController($urlGenerator, $profiler, $twig, []);
     }
 }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Csp/ContentSecurityPolicyHandlerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Csp/ContentSecurityPolicyHandlerTest.php
index 5139778369..bbf96c3b2b 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Csp/ContentSecurityPolicyHandlerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Csp/ContentSecurityPolicyHandlerTest.php
@@ -55,21 +55,21 @@ class ContentSecurityPolicyHandlerTest extends TestCase
         $responseScriptNonce = 'response-with-headers-script-nonce';
         $responseStyleNonce = 'response-with-headers-style-nonce';
 
-        $requestNonceHeaders = array(
+        $requestNonceHeaders = [
             'X-SymfonyProfiler-Script-Nonce' => $requestScriptNonce,
             'X-SymfonyProfiler-Style-Nonce' => $requestStyleNonce,
-        );
-        $responseNonceHeaders = array(
+        ];
+        $responseNonceHeaders = [
             'X-SymfonyProfiler-Script-Nonce' => $responseScriptNonce,
             'X-SymfonyProfiler-Style-Nonce' => $responseStyleNonce,
-        );
+        ];
 
-        return array(
-            array($nonce, array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce), $this->createRequest(), $this->createResponse()),
-            array($nonce, array('csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce), $this->createRequest($requestNonceHeaders), $this->createResponse($responseNonceHeaders)),
-            array($nonce, array('csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce), $this->createRequest($requestNonceHeaders), $this->createResponse()),
-            array($nonce, array('csp_script_nonce' => $responseScriptNonce, 'csp_style_nonce' => $responseStyleNonce), $this->createRequest(), $this->createResponse($responseNonceHeaders)),
-        );
+        return [
+            [$nonce, ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce], $this->createRequest(), $this->createResponse()],
+            [$nonce, ['csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce], $this->createRequest($requestNonceHeaders), $this->createResponse($responseNonceHeaders)],
+            [$nonce, ['csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce], $this->createRequest($requestNonceHeaders), $this->createResponse()],
+            [$nonce, ['csp_script_nonce' => $responseScriptNonce, 'csp_style_nonce' => $responseStyleNonce], $this->createRequest(), $this->createResponse($responseNonceHeaders)],
+        ];
     }
 
     public function provideRequestAndResponsesForOnKernelResponse()
@@ -82,103 +82,103 @@ class ContentSecurityPolicyHandlerTest extends TestCase
         $responseScriptNonce = 'response-with-headers-script-nonce';
         $responseStyleNonce = 'response-with-headers-style-nonce';
 
-        $requestNonceHeaders = array(
+        $requestNonceHeaders = [
             'X-SymfonyProfiler-Script-Nonce' => $requestScriptNonce,
             'X-SymfonyProfiler-Style-Nonce' => $requestStyleNonce,
-        );
-        $responseNonceHeaders = array(
+        ];
+        $responseNonceHeaders = [
             'X-SymfonyProfiler-Script-Nonce' => $responseScriptNonce,
             'X-SymfonyProfiler-Style-Nonce' => $responseStyleNonce,
-        );
+        ];
 
-        return array(
-            array(
+        return [
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
                 $this->createResponse(),
-                array('Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null),
-            ),
-            array(
-                $nonce, array('csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce),
+                ['Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null],
+            ],
+            [
+                $nonce, ['csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce],
                 $this->createRequest($requestNonceHeaders),
                 $this->createResponse($responseNonceHeaders),
-                array('Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                ['Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce),
+                ['csp_script_nonce' => $requestScriptNonce, 'csp_style_nonce' => $requestStyleNonce],
                 $this->createRequest($requestNonceHeaders),
                 $this->createResponse(),
-                array('Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                ['Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $responseScriptNonce, 'csp_style_nonce' => $responseStyleNonce),
+                ['csp_script_nonce' => $responseScriptNonce, 'csp_style_nonce' => $responseStyleNonce],
                 $this->createRequest(),
                 $this->createResponse($responseNonceHeaders),
-                array('Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                ['Content-Security-Policy' => null, 'Content-Security-Policy-Report-Only' => null, 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('Content-Security-Policy' => 'frame-ancestors https: ; form-action: https:', 'Content-Security-Policy-Report-Only' => 'frame-ancestors http: ; form-action: http:')),
-                array('Content-Security-Policy' => 'frame-ancestors https: ; form-action: https:', 'Content-Security-Policy-Report-Only' => 'frame-ancestors http: ; form-action: http:', 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['Content-Security-Policy' => 'frame-ancestors https: ; form-action: https:', 'Content-Security-Policy-Report-Only' => 'frame-ancestors http: ; form-action: http:']),
+                ['Content-Security-Policy' => 'frame-ancestors https: ; form-action: https:', 'Content-Security-Policy-Report-Only' => 'frame-ancestors http: ; form-action: http:', 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('Content-Security-Policy' => 'default-src \'self\' domain.com; script-src \'self\' \'unsafe-inline\'', 'Content-Security-Policy-Report-Only' => 'default-src \'self\' domain-report-only.com; script-src \'self\' \'unsafe-inline\'')),
-                array('Content-Security-Policy' => 'default-src \'self\' domain.com; script-src \'self\' \'unsafe-inline\'; style-src \'self\' domain.com \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy-Report-Only' => 'default-src \'self\' domain-report-only.com; script-src \'self\' \'unsafe-inline\'; style-src \'self\' domain-report-only.com \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['Content-Security-Policy' => 'default-src \'self\' domain.com; script-src \'self\' \'unsafe-inline\'', 'Content-Security-Policy-Report-Only' => 'default-src \'self\' domain-report-only.com; script-src \'self\' \'unsafe-inline\'']),
+                ['Content-Security-Policy' => 'default-src \'self\' domain.com; script-src \'self\' \'unsafe-inline\'; style-src \'self\' domain.com \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy-Report-Only' => 'default-src \'self\' domain-report-only.com; script-src \'self\' \'unsafe-inline\'; style-src \'self\' domain-report-only.com \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'')),
-                array('Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'', 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'']),
+                ['Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'', 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('Content-Security-Policy' => 'script-src \'self\'; style-src \'self\'')),
-                array('Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['Content-Security-Policy' => 'script-src \'self\'; style-src \'self\'']),
+                ['Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'')),
-                array('X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'', 'Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'']),
+                ['X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'', 'Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('X-Content-Security-Policy' => 'script-src \'self\'')),
-                array('X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['X-Content-Security-Policy' => 'script-src \'self\'']),
+                ['X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'sha384-LALALALALAAL\'')),
-                array('X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'sha384-LALALALALAAL\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy' => null),
-            ),
-            array(
+                $this->createResponse(['X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'sha384-LALALALALAAL\'']),
+                ['X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'sha384-LALALALALAAL\' \'nonce-'.$nonce.'\'', 'Content-Security-Policy' => null],
+            ],
+            [
                 $nonce,
-                array('csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce),
+                ['csp_script_nonce' => $nonce, 'csp_style_nonce' => $nonce],
                 $this->createRequest(),
-                $this->createResponse(array('Content-Security-Policy' => 'script-src \'self\'; style-src \'self\'', 'X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'; style-src \'self\'')),
-                array('Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\''),
-            ),
-        );
+                $this->createResponse(['Content-Security-Policy' => 'script-src \'self\'; style-src \'self\'', 'X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'; style-src \'self\'']),
+                ['Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\'', 'X-Content-Security-Policy' => 'script-src \'self\' \'unsafe-inline\'; style-src \'self\' \'unsafe-inline\' \'nonce-'.$nonce.'\''],
+            ],
+        ];
     }
 
-    private function createRequest(array $headers = array())
+    private function createRequest(array $headers = [])
     {
         $request = new Request();
         $request->headers->add($headers);
@@ -186,7 +186,7 @@ class ContentSecurityPolicyHandlerTest extends TestCase
         return $request;
     }
 
-    private function createResponse(array $headers = array())
+    private function createResponse(array $headers = [])
     {
         $response = new Response();
         $response->headers->add($headers);
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
index 12672d7e02..79e09054bb 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -24,19 +24,19 @@ class ConfigurationTest extends TestCase
     {
         $processor = new Processor();
         $configuration = new Configuration();
-        $config = $processor->processConfiguration($configuration, array($options));
+        $config = $processor->processConfiguration($configuration, [$options]);
 
         $this->assertEquals($results, $config);
     }
 
     public function getDebugModes()
     {
-        return array(
-            array(array(), array('intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt')),
-            array(array('intercept_redirects' => true), array('intercept_redirects' => true, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt')),
-            array(array('intercept_redirects' => false), array('intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt')),
-            array(array('toolbar' => true), array('intercept_redirects' => false, 'toolbar' => true, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt')),
-            array(array('excluded_ajax_paths' => 'test'), array('intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => 'test')),
-        );
+        return [
+            [[], ['intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt']],
+            [['intercept_redirects' => true], ['intercept_redirects' => true, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt']],
+            [['intercept_redirects' => false], ['intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt']],
+            [['toolbar' => true], ['intercept_redirects' => false, 'toolbar' => true, 'excluded_ajax_paths' => '^/((index|app(_[\w]+)?)\.php/)?_wdt']],
+            [['excluded_ajax_paths' => 'test'], ['intercept_redirects' => false, 'toolbar' => false, 'excluded_ajax_paths' => 'test']],
+        ];
     }
 }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/WebProfilerExtensionTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/WebProfilerExtensionTest.php
index 0fb7f85eb5..b5633bb409 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/WebProfilerExtensionTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/DependencyInjection/WebProfilerExtensionTest.php
@@ -28,9 +28,9 @@ class WebProfilerExtensionTest extends TestCase
      */
     private $container;
 
-    public static function assertSaneContainer(Container $container, $message = '', $knownPrivates = array())
+    public static function assertSaneContainer(Container $container, $message = '', $knownPrivates = [])
     {
-        $errors = array();
+        $errors = [];
         $knownPrivates[] = 'debug.file_link_formatter.url_format';
         foreach ($container->getServiceIds() as $id) {
             if (\in_array($id, $knownPrivates, true)) { // for BC with 3.4
@@ -43,7 +43,7 @@ class WebProfilerExtensionTest extends TestCase
             }
         }
 
-        self::assertEquals(array(), $errors, $message);
+        self::assertEquals([], $errors, $message);
     }
 
     protected function setUp()
@@ -56,19 +56,19 @@ class WebProfilerExtensionTest extends TestCase
         $this->container->register('event_dispatcher', EventDispatcher::class)->setPublic(true);
         $this->container->register('router', $this->getMockClass('Symfony\\Component\\Routing\\RouterInterface'))->setPublic(true);
         $this->container->register('twig', 'Twig\Environment')->setPublic(true);
-        $this->container->register('twig_loader', 'Twig\Loader\ArrayLoader')->addArgument(array())->setPublic(true);
+        $this->container->register('twig_loader', 'Twig\Loader\ArrayLoader')->addArgument([])->setPublic(true);
         $this->container->register('twig', 'Twig\Environment')->addArgument(new Reference('twig_loader'))->setPublic(true);
-        $this->container->setParameter('kernel.bundles', array());
+        $this->container->setParameter('kernel.bundles', []);
         $this->container->setParameter('kernel.cache_dir', __DIR__);
         $this->container->setParameter('kernel.debug', false);
         $this->container->setParameter('kernel.project_dir', __DIR__);
         $this->container->setParameter('kernel.charset', 'UTF-8');
         $this->container->setParameter('debug.file_link_format', null);
-        $this->container->setParameter('profiler.class', array('Symfony\\Component\\HttpKernel\\Profiler\\Profiler'));
+        $this->container->setParameter('profiler.class', ['Symfony\\Component\\HttpKernel\\Profiler\\Profiler']);
         $this->container->register('profiler', $this->getMockClass('Symfony\\Component\\HttpKernel\\Profiler\\Profiler'))
             ->setPublic(true)
             ->addArgument(new Definition($this->getMockClass('Symfony\\Component\\HttpKernel\\Profiler\\ProfilerStorageInterface')));
-        $this->container->setParameter('data_collector.templates', array());
+        $this->container->setParameter('data_collector.templates', []);
         $this->container->set('kernel', $this->kernel);
         $this->container->addCompilerPass(new RegisterListenersPass());
     }
@@ -89,7 +89,7 @@ class WebProfilerExtensionTest extends TestCase
         $this->container->setParameter('kernel.debug', $debug);
 
         $extension = new WebProfilerExtension();
-        $extension->load(array(array()), $this->container);
+        $extension->load([[]], $this->container);
 
         $this->assertFalse($this->container->has('web_profiler.debug_toolbar'));
 
@@ -102,11 +102,11 @@ class WebProfilerExtensionTest extends TestCase
     public function testToolbarConfig($toolbarEnabled, $interceptRedirects, $listenerInjected, $listenerEnabled)
     {
         $extension = new WebProfilerExtension();
-        $extension->load(array(array('toolbar' => $toolbarEnabled, 'intercept_redirects' => $interceptRedirects)), $this->container);
+        $extension->load([['toolbar' => $toolbarEnabled, 'intercept_redirects' => $interceptRedirects]], $this->container);
 
         $this->assertSame($listenerInjected, $this->container->has('web_profiler.debug_toolbar'));
 
-        $this->assertSaneContainer($this->getCompiledContainer(), '', array('web_profiler.csp.handler'));
+        $this->assertSaneContainer($this->getCompiledContainer(), '', ['web_profiler.csp.handler']);
 
         if ($listenerInjected) {
             $this->assertSame($listenerEnabled, $this->container->get('web_profiler.debug_toolbar')->isEnabled());
@@ -115,12 +115,12 @@ class WebProfilerExtensionTest extends TestCase
 
     public function getDebugModes()
     {
-        return array(
-            array(false, false, false, false),
-            array(true,  false, true,  true),
-            array(false, true,  true,  false),
-            array(true,  true,  true,  true),
-        );
+        return [
+            [false, false, false, false],
+            [true,  false, true,  true],
+            [false, true,  true,  false],
+            [true,  true,  true,  true],
+        ];
     }
 
     private function getCompiledContainer()
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
index c0f061af9d..1d6bd12dae 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/EventListener/WebDebugToolbarListenerTest.php
@@ -33,15 +33,15 @@ class WebDebugToolbarListenerTest extends TestCase
 
         $response = new Response($content);
 
-        $m->invoke($listener, $response, Request::create('/'), array('csp_script_nonce' => 'scripto', 'csp_style_nonce' => 'stylo'));
+        $m->invoke($listener, $response, Request::create('/'), ['csp_script_nonce' => 'scripto', 'csp_style_nonce' => 'stylo']);
         $this->assertEquals($expected, $response->getContent());
     }
 
     public function getInjectToolbarTests()
     {
-        return array(
-            array('<html><head></head><body></body></html>', "<html><head></head><body>\nWDT\n</body></html>"),
-            array('<html>
+        return [
+            ['<html><head></head><body></body></html>', "<html><head></head><body>\nWDT\n</body></html>"],
+            ['<html>
             <head></head>
             <body>
             <textarea><html><head></head><body></body></html></textarea>
@@ -51,8 +51,8 @@ class WebDebugToolbarListenerTest extends TestCase
             <body>
             <textarea><html><head></head><body></body></html></textarea>
             \nWDT\n</body>
-            </html>"),
-        );
+            </html>"],
+        ];
     }
 
     /**
@@ -134,12 +134,12 @@ class WebDebugToolbarListenerTest extends TestCase
 
     public function provideRedirects()
     {
-        return array(
-            array(301, true),
-            array(302, true),
-            array(301, false),
-            array(302, false),
-        );
+        return [
+            [301, true],
+            [302, true],
+            [301, false],
+            [302, false],
+        ];
     }
 
     /**
@@ -230,7 +230,7 @@ class WebDebugToolbarListenerTest extends TestCase
         $urlGenerator
             ->expects($this->once())
             ->method('generate')
-            ->with('_profiler', array('token' => 'xxxxxxxx'), UrlGeneratorInterface::ABSOLUTE_URL)
+            ->with('_profiler', ['token' => 'xxxxxxxx'], UrlGeneratorInterface::ABSOLUTE_URL)
             ->will($this->returnValue('http://mydomain.com/_profiler/xxxxxxxx'))
         ;
 
@@ -251,7 +251,7 @@ class WebDebugToolbarListenerTest extends TestCase
         $urlGenerator
             ->expects($this->once())
             ->method('generate')
-            ->with('_profiler', array('token' => 'xxxxxxxx'))
+            ->with('_profiler', ['token' => 'xxxxxxxx'])
             ->willThrowException(new \Exception('foo'))
         ;
 
@@ -272,7 +272,7 @@ class WebDebugToolbarListenerTest extends TestCase
         $urlGenerator
             ->expects($this->once())
             ->method('generate')
-            ->with('_profiler', array('token' => 'xxxxxxxx'))
+            ->with('_profiler', ['token' => 'xxxxxxxx'])
             ->willThrowException(new \Exception("This\nmultiline\r\ntabbed text should\tcome out\r on\n \ta single plain\r\nline"))
         ;
 
@@ -286,7 +286,7 @@ class WebDebugToolbarListenerTest extends TestCase
 
     protected function getRequestMock($isXmlHttpRequest = false, $requestFormat = 'html', $hasSession = true)
     {
-        $request = $this->getMockBuilder('Symfony\Component\HttpFoundation\Request')->setMethods(array('getSession', 'isXmlHttpRequest', 'getRequestFormat'))->disableOriginalConstructor()->getMock();
+        $request = $this->getMockBuilder('Symfony\Component\HttpFoundation\Request')->setMethods(['getSession', 'isXmlHttpRequest', 'getRequestFormat'])->disableOriginalConstructor()->getMock();
         $request->expects($this->any())
             ->method('isXmlHttpRequest')
             ->will($this->returnValue($isXmlHttpRequest));
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Tests/Profiler/TemplateManagerTest.php b/src/Symfony/Bundle/WebProfilerBundle/Tests/Profiler/TemplateManagerTest.php
index 6043be51aa..fbdb975745 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Tests/Profiler/TemplateManagerTest.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Tests/Profiler/TemplateManagerTest.php
@@ -43,11 +43,11 @@ class TemplateManagerTest extends TestCase
 
         $profiler = $this->mockProfiler();
         $twigEnvironment = $this->mockTwigEnvironment();
-        $templates = array(
-            'data_collector.foo' => array('foo', 'FooBundle:Collector:foo'),
-            'data_collector.bar' => array('bar', 'FooBundle:Collector:bar'),
-            'data_collector.baz' => array('baz', 'FooBundle:Collector:baz'),
-        );
+        $templates = [
+            'data_collector.foo' => ['foo', 'FooBundle:Collector:foo'],
+            'data_collector.bar' => ['bar', 'FooBundle:Collector:bar'],
+            'data_collector.baz' => ['baz', 'FooBundle:Collector:baz'],
+        ];
 
         $this->templateManager = new TemplateManager($profiler, $twigEnvironment, $templates);
     }
@@ -69,12 +69,12 @@ class TemplateManagerTest extends TestCase
         $this->profiler->expects($this->any())
             ->method('has')
             ->withAnyParameters()
-            ->will($this->returnCallback(array($this, 'profilerHasCallback')));
+            ->will($this->returnCallback([$this, 'profilerHasCallback']));
 
         $profile = $this->mockProfile();
         $profile->expects($this->any())
             ->method('hasCollector')
-            ->will($this->returnCallback(array($this, 'profileHasCollectorCallback')));
+            ->will($this->returnCallback([$this, 'profileHasCollectorCallback']));
 
         $this->assertEquals('FooBundle:Collector:foo.html.twig', $this->templateManager->getName($profile, 'foo'));
     }
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php b/src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php
index c714ff0642..4494783633 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Twig/WebProfilerExtension.php
@@ -63,18 +63,18 @@ class WebProfilerExtension extends ProfilerExtension
      */
     public function getFunctions()
     {
-        return array(
-            new TwigFunction('profiler_dump', array($this, 'dumpData'), array('is_safe' => array('html'), 'needs_environment' => true)),
-            new TwigFunction('profiler_dump_log', array($this, 'dumpLog'), array('is_safe' => array('html'), 'needs_environment' => true)),
-        );
+        return [
+            new TwigFunction('profiler_dump', [$this, 'dumpData'], ['is_safe' => ['html'], 'needs_environment' => true]),
+            new TwigFunction('profiler_dump_log', [$this, 'dumpLog'], ['is_safe' => ['html'], 'needs_environment' => true]),
+        ];
     }
 
     public function dumpData(Environment $env, Data $data, $maxDepth = 0)
     {
         $this->dumper->setCharset($env->getCharset());
-        $this->dumper->dump($data, null, array(
+        $this->dumper->dump($data, null, [
             'maxDepth' => $maxDepth,
-        ));
+        ]);
 
         $dump = stream_get_contents($this->output, -1, 0);
         rewind($this->output);
@@ -92,7 +92,7 @@ class WebProfilerExtension extends ProfilerExtension
             return '<span class="dump-inline">'.$message.'</span>';
         }
 
-        $replacements = array();
+        $replacements = [];
         foreach ($context as $k => $v) {
             $k = '{'.twig_escape_filter($env, $k).'}';
             $replacements['&quot;<b>'.$k.'</b>&quot;'] = $replacements['&quot;'.$k.'&quot;'] = $replacements[$k] = $this->dumpData($env, $v);
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerLogCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerLogCommand.php
index a9c62c99c6..73c51cc8e0 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerLogCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerLogCommand.php
@@ -27,7 +27,7 @@ use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
  */
 class ServerLogCommand extends Command
 {
-    private static $bgColor = array('black', 'blue', 'cyan', 'green', 'magenta', 'red', 'white', 'yellow');
+    private static $bgColor = ['black', 'blue', 'cyan', 'green', 'magenta', 'red', 'white', 'yellow'];
 
     private $el;
     private $handler;
@@ -87,12 +87,12 @@ EOF
 
         $this->handler = new ConsoleHandler($output);
 
-        $this->handler->setFormatter(new ConsoleFormatter(array(
+        $this->handler->setFormatter(new ConsoleFormatter([
             'format' => str_replace('\n', "\n", $input->getOption('format')),
             'date_format' => $input->getOption('date-format'),
             'colors' => $output->isDecorated(),
             'multiline' => OutputInterface::VERBOSITY_DEBUG <= $output->getVerbosity(),
-        )));
+        ]));
 
         if (false === strpos($host = $input->getOption('host'), '://')) {
             $host = 'tcp://'.$host;
@@ -120,8 +120,8 @@ EOF
 
     private function getLogs($socket)
     {
-        $sockets = array((int) $socket => $socket);
-        $write = array();
+        $sockets = [(int) $socket => $socket];
+        $write = [];
 
         while (true) {
             $read = $sockets;
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerRunCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerRunCommand.php
index 714f325cac..de5a8c5b3c 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerRunCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerRunCommand.php
@@ -48,11 +48,11 @@ class ServerRunCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('addressport', InputArgument::OPTIONAL, 'The address to listen to (can be address:port, address, or port)'),
                 new InputOption('docroot', 'd', InputOption::VALUE_REQUIRED, 'Document root, usually where your front controllers are stored'),
                 new InputOption('router', 'r', InputOption::VALUE_REQUIRED, 'Path to custom router script'),
-            ))
+            ])
             ->setDescription('Runs a local web server')
             ->setHelp(<<<'EOF'
 <info>%command.name%</info> runs a local web server: By default, the server
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
index 130c4d2fcc..55bf7a7c65 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerStartCommand.php
@@ -48,12 +48,12 @@ class ServerStartCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('addressport', InputArgument::OPTIONAL, 'The address to listen to (can be address:port, address, or port)'),
                 new InputOption('docroot', 'd', InputOption::VALUE_REQUIRED, 'Document root'),
                 new InputOption('router', 'r', InputOption::VALUE_REQUIRED, 'Path to custom router script'),
                 new InputOption('pidfile', null, InputOption::VALUE_REQUIRED, 'PID file'),
-            ))
+            ])
             ->setDescription('Starts a local web server in the background')
             ->setHelp(<<<'EOF'
 <info>%command.name%</info> runs a local web server: By default, the server
@@ -91,10 +91,10 @@ EOF
         $io = new SymfonyStyle($input, $output instanceof ConsoleOutputInterface ? $output->getErrorOutput() : $output);
 
         if (!\extension_loaded('pcntl')) {
-            $io->error(array(
+            $io->error([
                 'This command needs the pcntl extension to run.',
                 'You can either install it or use the "server:run" command instead.',
-            ));
+            ]);
 
             if ($io->confirm('Do you want to execute <info>server:run</info> immediately?', false)) {
                 return $this->getApplication()->find('server:run')->run($input, $output);
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerStatusCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerStatusCommand.php
index 938c5ca24a..95e8122a2d 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerStatusCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerStatusCommand.php
@@ -36,10 +36,10 @@ class ServerStatusCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputOption('pidfile', null, InputOption::VALUE_REQUIRED, 'PID file'),
                 new InputOption('filter', null, InputOption::VALUE_REQUIRED, 'The value to display (one of port, host, or address)'),
-            ))
+            ])
             ->setDescription('Outputs the status of the local web server')
             ->setHelp(<<<'EOF'
 <info>%command.name%</info> shows the details of the given local web
diff --git a/src/Symfony/Bundle/WebServerBundle/Command/ServerStopCommand.php b/src/Symfony/Bundle/WebServerBundle/Command/ServerStopCommand.php
index a64bbcbb05..f86df7ff00 100644
--- a/src/Symfony/Bundle/WebServerBundle/Command/ServerStopCommand.php
+++ b/src/Symfony/Bundle/WebServerBundle/Command/ServerStopCommand.php
@@ -34,9 +34,9 @@ class ServerStopCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputOption('pidfile', null, InputOption::VALUE_REQUIRED, 'PID file'),
-            ))
+            ])
             ->setDescription('Stops the local web server that was started with the server:start command')
             ->setHelp(<<<'EOF'
 <info>%command.name%</info> stops the local web server:
diff --git a/src/Symfony/Bundle/WebServerBundle/Tests/DependencyInjection/WebServerExtensionTest.php b/src/Symfony/Bundle/WebServerBundle/Tests/DependencyInjection/WebServerExtensionTest.php
index 0d9c2f4bd5..f52f0d2c58 100644
--- a/src/Symfony/Bundle/WebServerBundle/Tests/DependencyInjection/WebServerExtensionTest.php
+++ b/src/Symfony/Bundle/WebServerBundle/Tests/DependencyInjection/WebServerExtensionTest.php
@@ -22,7 +22,7 @@ class WebServerExtensionTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->setParameter('kernel.project_dir', __DIR__);
-        (new WebServerExtension())->load(array(), $container);
+        (new WebServerExtension())->load([], $container);
 
         $this->assertSame(
             __DIR__.'/test',
diff --git a/src/Symfony/Bundle/WebServerBundle/WebServer.php b/src/Symfony/Bundle/WebServerBundle/WebServer.php
index 1195853b08..5ea058fa26 100644
--- a/src/Symfony/Bundle/WebServerBundle/WebServer.php
+++ b/src/Symfony/Bundle/WebServerBundle/WebServer.php
@@ -150,14 +150,14 @@ class WebServer
             throw new \RuntimeException('Unable to find the PHP binary.');
         }
 
-        $xdebugArgs = ini_get('xdebug.profiler_enable_trigger') ? array('-dxdebug.profiler_enable_trigger=1') : array();
+        $xdebugArgs = ini_get('xdebug.profiler_enable_trigger') ? ['-dxdebug.profiler_enable_trigger=1'] : [];
 
-        $process = new Process(array_merge(array($binary), $finder->findArguments(), $xdebugArgs, array('-dvariables_order=EGPCS', '-S', $config->getAddress(), $config->getRouter())));
+        $process = new Process(array_merge([$binary], $finder->findArguments(), $xdebugArgs, ['-dvariables_order=EGPCS', '-S', $config->getAddress(), $config->getRouter()]));
         $process->setWorkingDirectory($config->getDocumentRoot());
         $process->setTimeout(null);
 
         if (\in_array('APP_ENV', explode(',', getenv('SYMFONY_DOTENV_VARS')))) {
-            $process->setEnv(array('APP_ENV' => false));
+            $process->setEnv(['APP_ENV' => false]);
             $process->inheritEnvironmentVariables();
         }
 
diff --git a/src/Symfony/Bundle/WebServerBundle/WebServerConfig.php b/src/Symfony/Bundle/WebServerBundle/WebServerConfig.php
index 275926c18e..10e6ae4c81 100644
--- a/src/Symfony/Bundle/WebServerBundle/WebServerConfig.php
+++ b/src/Symfony/Bundle/WebServerBundle/WebServerConfig.php
@@ -130,7 +130,7 @@ class WebServerConfig
 
     private function getFrontControllerFileNames($env)
     {
-        return array('app_'.$env.'.php', 'app.php', 'index_'.$env.'.php', 'index.php');
+        return ['app_'.$env.'.php', 'app.php', 'index_'.$env.'.php', 'index.php'];
     }
 
     private function findBestPort()
diff --git a/src/Symfony/Component/Asset/Packages.php b/src/Symfony/Component/Asset/Packages.php
index 63808d9078..3e82dcdcd4 100644
--- a/src/Symfony/Component/Asset/Packages.php
+++ b/src/Symfony/Component/Asset/Packages.php
@@ -23,13 +23,13 @@ use Symfony\Component\Asset\Exception\LogicException;
 class Packages
 {
     private $defaultPackage;
-    private $packages = array();
+    private $packages = [];
 
     /**
      * @param PackageInterface   $defaultPackage The default package
      * @param PackageInterface[] $packages       Additional packages indexed by name
      */
-    public function __construct(PackageInterface $defaultPackage = null, array $packages = array())
+    public function __construct(PackageInterface $defaultPackage = null, array $packages = [])
     {
         $this->defaultPackage = $defaultPackage;
 
diff --git a/src/Symfony/Component/Asset/Tests/PackageTest.php b/src/Symfony/Component/Asset/Tests/PackageTest.php
index a5da219b59..8f6626ae4d 100644
--- a/src/Symfony/Component/Asset/Tests/PackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/PackageTest.php
@@ -29,22 +29,22 @@ class PackageTest extends TestCase
 
     public function getConfigs()
     {
-        return array(
-            array('v1', '', 'http://example.com/foo', 'http://example.com/foo'),
-            array('v1', '', 'https://example.com/foo', 'https://example.com/foo'),
-            array('v1', '', '//example.com/foo', '//example.com/foo'),
+        return [
+            ['v1', '', 'http://example.com/foo', 'http://example.com/foo'],
+            ['v1', '', 'https://example.com/foo', 'https://example.com/foo'],
+            ['v1', '', '//example.com/foo', '//example.com/foo'],
 
-            array('v1', '', '/foo', '/foo?v1'),
-            array('v1', '', 'foo', 'foo?v1'),
+            ['v1', '', '/foo', '/foo?v1'],
+            ['v1', '', 'foo', 'foo?v1'],
 
-            array(null, '', '/foo', '/foo'),
-            array(null, '', 'foo', 'foo'),
+            [null, '', '/foo', '/foo'],
+            [null, '', 'foo', 'foo'],
 
-            array('v1', 'version-%2$s/%1$s', '/foo', '/version-v1/foo'),
-            array('v1', 'version-%2$s/%1$s', 'foo', 'version-v1/foo'),
-            array('v1', 'version-%2$s/%1$s', 'foo/', 'version-v1/foo/'),
-            array('v1', 'version-%2$s/%1$s', '/foo/', '/version-v1/foo/'),
-        );
+            ['v1', 'version-%2$s/%1$s', '/foo', '/version-v1/foo'],
+            ['v1', 'version-%2$s/%1$s', 'foo', 'version-v1/foo'],
+            ['v1', 'version-%2$s/%1$s', 'foo/', 'version-v1/foo/'],
+            ['v1', 'version-%2$s/%1$s', '/foo/', '/version-v1/foo/'],
+        ];
     }
 
     public function testGetVersion()
diff --git a/src/Symfony/Component/Asset/Tests/PackagesTest.php b/src/Symfony/Component/Asset/Tests/PackagesTest.php
index 4b0872f7f2..b751986d48 100644
--- a/src/Symfony/Component/Asset/Tests/PackagesTest.php
+++ b/src/Symfony/Component/Asset/Tests/PackagesTest.php
@@ -27,7 +27,7 @@ class PackagesTest extends TestCase
         $this->assertEquals($default, $packages->getPackage());
         $this->assertEquals($a, $packages->getPackage('a'));
 
-        $packages = new Packages($default, array('a' => $a));
+        $packages = new Packages($default, ['a' => $a]);
 
         $this->assertEquals($default, $packages->getPackage());
         $this->assertEquals($a, $packages->getPackage('a'));
@@ -37,7 +37,7 @@ class PackagesTest extends TestCase
     {
         $packages = new Packages(
             new Package(new StaticVersionStrategy('default')),
-            array('a' => new Package(new StaticVersionStrategy('a')))
+            ['a' => new Package(new StaticVersionStrategy('a'))]
         );
 
         $this->assertEquals('default', $packages->getVersion('/foo'));
@@ -48,7 +48,7 @@ class PackagesTest extends TestCase
     {
         $packages = new Packages(
             new Package(new StaticVersionStrategy('default')),
-            array('a' => new Package(new StaticVersionStrategy('a')))
+            ['a' => new Package(new StaticVersionStrategy('a'))]
         );
 
         $this->assertEquals('/foo?default', $packages->getUrl('/foo'));
diff --git a/src/Symfony/Component/Asset/Tests/PathPackageTest.php b/src/Symfony/Component/Asset/Tests/PathPackageTest.php
index 4a9f90df90..c6edc8de61 100644
--- a/src/Symfony/Component/Asset/Tests/PathPackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/PathPackageTest.php
@@ -28,24 +28,24 @@ class PathPackageTest extends TestCase
 
     public function getConfigs()
     {
-        return array(
-            array('/foo', '', 'http://example.com/foo', 'http://example.com/foo'),
-            array('/foo', '', 'https://example.com/foo', 'https://example.com/foo'),
-            array('/foo', '', '//example.com/foo', '//example.com/foo'),
+        return [
+            ['/foo', '', 'http://example.com/foo', 'http://example.com/foo'],
+            ['/foo', '', 'https://example.com/foo', 'https://example.com/foo'],
+            ['/foo', '', '//example.com/foo', '//example.com/foo'],
 
-            array('', '', '/foo', '/foo?v1'),
+            ['', '', '/foo', '/foo?v1'],
 
-            array('/foo', '', '/bar', '/bar?v1'),
-            array('/foo', '', 'bar', '/foo/bar?v1'),
-            array('foo', '', 'bar', '/foo/bar?v1'),
-            array('foo/', '', 'bar', '/foo/bar?v1'),
-            array('/foo/', '', 'bar', '/foo/bar?v1'),
+            ['/foo', '', '/bar', '/bar?v1'],
+            ['/foo', '', 'bar', '/foo/bar?v1'],
+            ['foo', '', 'bar', '/foo/bar?v1'],
+            ['foo/', '', 'bar', '/foo/bar?v1'],
+            ['/foo/', '', 'bar', '/foo/bar?v1'],
 
-            array('/foo', 'version-%2$s/%1$s', '/bar', '/version-v1/bar'),
-            array('/foo', 'version-%2$s/%1$s', 'bar', '/foo/version-v1/bar'),
-            array('/foo', 'version-%2$s/%1$s', 'bar/', '/foo/version-v1/bar/'),
-            array('/foo', 'version-%2$s/%1$s', '/bar/', '/version-v1/bar/'),
-        );
+            ['/foo', 'version-%2$s/%1$s', '/bar', '/version-v1/bar'],
+            ['/foo', 'version-%2$s/%1$s', 'bar', '/foo/version-v1/bar'],
+            ['/foo', 'version-%2$s/%1$s', 'bar/', '/foo/version-v1/bar/'],
+            ['/foo', 'version-%2$s/%1$s', '/bar/', '/version-v1/bar/'],
+        ];
     }
 
     /**
@@ -60,19 +60,19 @@ class PathPackageTest extends TestCase
 
     public function getContextConfigs()
     {
-        return array(
-            array('', '/foo', '', '/baz', '/baz?v1'),
-            array('', '/foo', '', 'baz', '/foo/baz?v1'),
-            array('', 'foo', '', 'baz', '/foo/baz?v1'),
-            array('', 'foo/', '', 'baz', '/foo/baz?v1'),
-            array('', '/foo/', '', 'baz', '/foo/baz?v1'),
+        return [
+            ['', '/foo', '', '/baz', '/baz?v1'],
+            ['', '/foo', '', 'baz', '/foo/baz?v1'],
+            ['', 'foo', '', 'baz', '/foo/baz?v1'],
+            ['', 'foo/', '', 'baz', '/foo/baz?v1'],
+            ['', '/foo/', '', 'baz', '/foo/baz?v1'],
 
-            array('/bar', '/foo', '', '/baz', '/baz?v1'),
-            array('/bar', '/foo', '', 'baz', '/bar/foo/baz?v1'),
-            array('/bar', 'foo', '', 'baz', '/bar/foo/baz?v1'),
-            array('/bar', 'foo/', '', 'baz', '/bar/foo/baz?v1'),
-            array('/bar', '/foo/', '', 'baz', '/bar/foo/baz?v1'),
-        );
+            ['/bar', '/foo', '', '/baz', '/baz?v1'],
+            ['/bar', '/foo', '', 'baz', '/bar/foo/baz?v1'],
+            ['/bar', 'foo', '', 'baz', '/bar/foo/baz?v1'],
+            ['/bar', 'foo/', '', 'baz', '/bar/foo/baz?v1'],
+            ['/bar', '/foo/', '', 'baz', '/bar/foo/baz?v1'],
+        ];
     }
 
     public function testVersionStrategyGivesAbsoluteURL()
diff --git a/src/Symfony/Component/Asset/Tests/UrlPackageTest.php b/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
index ff6d5f49ec..097c1a891d 100644
--- a/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
+++ b/src/Symfony/Component/Asset/Tests/UrlPackageTest.php
@@ -29,33 +29,33 @@ class UrlPackageTest extends TestCase
 
     public function getConfigs()
     {
-        return array(
-            array('http://example.net', '', 'http://example.com/foo', 'http://example.com/foo'),
-            array('http://example.net', '', 'https://example.com/foo', 'https://example.com/foo'),
-            array('http://example.net', '', '//example.com/foo', '//example.com/foo'),
-            array('file:///example/net', '', 'file:///example/com/foo', 'file:///example/com/foo'),
-            array('ftp://example.net', '', 'ftp://example.com', 'ftp://example.com'),
+        return [
+            ['http://example.net', '', 'http://example.com/foo', 'http://example.com/foo'],
+            ['http://example.net', '', 'https://example.com/foo', 'https://example.com/foo'],
+            ['http://example.net', '', '//example.com/foo', '//example.com/foo'],
+            ['file:///example/net', '', 'file:///example/com/foo', 'file:///example/com/foo'],
+            ['ftp://example.net', '', 'ftp://example.com', 'ftp://example.com'],
 
-            array('http://example.com', '', '/foo', 'http://example.com/foo?v1'),
-            array('http://example.com', '', 'foo', 'http://example.com/foo?v1'),
-            array('http://example.com/', '', 'foo', 'http://example.com/foo?v1'),
-            array('http://example.com/foo', '', 'foo', 'http://example.com/foo/foo?v1'),
-            array('http://example.com/foo/', '', 'foo', 'http://example.com/foo/foo?v1'),
-            array('file:///example/com/foo/', '', 'foo', 'file:///example/com/foo/foo?v1'),
+            ['http://example.com', '', '/foo', 'http://example.com/foo?v1'],
+            ['http://example.com', '', 'foo', 'http://example.com/foo?v1'],
+            ['http://example.com/', '', 'foo', 'http://example.com/foo?v1'],
+            ['http://example.com/foo', '', 'foo', 'http://example.com/foo/foo?v1'],
+            ['http://example.com/foo/', '', 'foo', 'http://example.com/foo/foo?v1'],
+            ['file:///example/com/foo/', '', 'foo', 'file:///example/com/foo/foo?v1'],
 
-            array(array('http://example.com'), '', '/foo', 'http://example.com/foo?v1'),
-            array(array('http://example.com', 'http://example.net'), '', '/foo', 'http://example.com/foo?v1'),
-            array(array('http://example.com', 'http://example.net'), '', '/fooa', 'http://example.net/fooa?v1'),
-            array(array('file:///example/com', 'file:///example/net'), '', '/foo', 'file:///example/com/foo?v1'),
-            array(array('ftp://example.com', 'ftp://example.net'), '', '/fooa', 'ftp://example.net/fooa?v1'),
+            [['http://example.com'], '', '/foo', 'http://example.com/foo?v1'],
+            [['http://example.com', 'http://example.net'], '', '/foo', 'http://example.com/foo?v1'],
+            [['http://example.com', 'http://example.net'], '', '/fooa', 'http://example.net/fooa?v1'],
+            [['file:///example/com', 'file:///example/net'], '', '/foo', 'file:///example/com/foo?v1'],
+            [['ftp://example.com', 'ftp://example.net'], '', '/fooa', 'ftp://example.net/fooa?v1'],
 
-            array('http://example.com', 'version-%2$s/%1$s', '/foo', 'http://example.com/version-v1/foo'),
-            array('http://example.com', 'version-%2$s/%1$s', 'foo', 'http://example.com/version-v1/foo'),
-            array('http://example.com', 'version-%2$s/%1$s', 'foo/', 'http://example.com/version-v1/foo/'),
-            array('http://example.com', 'version-%2$s/%1$s', '/foo/', 'http://example.com/version-v1/foo/'),
-            array('file:///example/com', 'version-%2$s/%1$s', '/foo/', 'file:///example/com/version-v1/foo/'),
-            array('ftp://example.com', 'version-%2$s/%1$s', '/foo/', 'ftp://example.com/version-v1/foo/'),
-        );
+            ['http://example.com', 'version-%2$s/%1$s', '/foo', 'http://example.com/version-v1/foo'],
+            ['http://example.com', 'version-%2$s/%1$s', 'foo', 'http://example.com/version-v1/foo'],
+            ['http://example.com', 'version-%2$s/%1$s', 'foo/', 'http://example.com/version-v1/foo/'],
+            ['http://example.com', 'version-%2$s/%1$s', '/foo/', 'http://example.com/version-v1/foo/'],
+            ['file:///example/com', 'version-%2$s/%1$s', '/foo/', 'file:///example/com/version-v1/foo/'],
+            ['ftp://example.com', 'version-%2$s/%1$s', '/foo/', 'ftp://example.com/version-v1/foo/'],
+        ];
     }
 
     /**
@@ -70,18 +70,18 @@ class UrlPackageTest extends TestCase
 
     public function getContextConfigs()
     {
-        return array(
-            array(false, 'http://example.com', '', 'foo', 'http://example.com/foo?v1'),
-            array(false, array('http://example.com'), '', 'foo', 'http://example.com/foo?v1'),
-            array(false, array('http://example.com', 'https://example.com'), '', 'foo', 'http://example.com/foo?v1'),
-            array(false, array('http://example.com', 'https://example.com'), '', 'fooa', 'https://example.com/fooa?v1'),
-            array(false, array('http://example.com/bar'), '', 'foo', 'http://example.com/bar/foo?v1'),
-            array(false, array('http://example.com/bar/'), '', 'foo', 'http://example.com/bar/foo?v1'),
-            array(false, array('//example.com/bar/'), '', 'foo', '//example.com/bar/foo?v1'),
+        return [
+            [false, 'http://example.com', '', 'foo', 'http://example.com/foo?v1'],
+            [false, ['http://example.com'], '', 'foo', 'http://example.com/foo?v1'],
+            [false, ['http://example.com', 'https://example.com'], '', 'foo', 'http://example.com/foo?v1'],
+            [false, ['http://example.com', 'https://example.com'], '', 'fooa', 'https://example.com/fooa?v1'],
+            [false, ['http://example.com/bar'], '', 'foo', 'http://example.com/bar/foo?v1'],
+            [false, ['http://example.com/bar/'], '', 'foo', 'http://example.com/bar/foo?v1'],
+            [false, ['//example.com/bar/'], '', 'foo', '//example.com/bar/foo?v1'],
 
-            array(true, array('http://example.com'), '', 'foo', 'http://example.com/foo?v1'),
-            array(true, array('http://example.com', 'https://example.com'), '', 'foo', 'https://example.com/foo?v1'),
-        );
+            [true, ['http://example.com'], '', 'foo', 'http://example.com/foo?v1'],
+            [true, ['http://example.com', 'https://example.com'], '', 'foo', 'https://example.com/foo?v1'],
+        ];
     }
 
     public function testVersionStrategyGivesAbsoluteURL()
@@ -100,7 +100,7 @@ class UrlPackageTest extends TestCase
      */
     public function testNoBaseUrls()
     {
-        new UrlPackage(array(), new EmptyVersionStrategy());
+        new UrlPackage([], new EmptyVersionStrategy());
     }
 
     /**
@@ -115,10 +115,10 @@ class UrlPackageTest extends TestCase
 
     public function getWrongBaseUrlConfig()
     {
-        return array(
-            array('not-a-url'),
-            array('not-a-url-with-query?query=://'),
-        );
+        return [
+            ['not-a-url'],
+            ['not-a-url-with-query?query=://'],
+        ];
     }
 
     private function getContext($secure)
diff --git a/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php b/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
index 7b5a3e8d5c..c56a8726a8 100644
--- a/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
+++ b/src/Symfony/Component/Asset/Tests/VersionStrategy/StaticVersionStrategyTest.php
@@ -36,9 +36,9 @@ class StaticVersionStrategyTest extends TestCase
 
     public function getConfigs()
     {
-        return array(
-            array('test-path', 'v1', null),
-            array('test-path', 'v2', '%s?test%s'),
-        );
+        return [
+            ['test-path', 'v1', null],
+            ['test-path', 'v2', '%s?test%s'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Asset/UrlPackage.php b/src/Symfony/Component/Asset/UrlPackage.php
index b9f91237d9..cb949d5969 100644
--- a/src/Symfony/Component/Asset/UrlPackage.php
+++ b/src/Symfony/Component/Asset/UrlPackage.php
@@ -35,7 +35,7 @@ use Symfony\Component\Asset\VersionStrategy\VersionStrategyInterface;
  */
 class UrlPackage extends Package
 {
-    private $baseUrls = array();
+    private $baseUrls = [];
     private $sslPackage;
 
     /**
@@ -125,7 +125,7 @@ class UrlPackage extends Package
 
     private function getSslUrls($urls)
     {
-        $sslUrls = array();
+        $sslUrls = [];
         foreach ($urls as $url) {
             if ('https://' === substr($url, 0, 8) || '//' === substr($url, 0, 2)) {
                 $sslUrls[] = $url;
diff --git a/src/Symfony/Component/BrowserKit/Cookie.php b/src/Symfony/Component/BrowserKit/Cookie.php
index 6efef3f1d8..ee786e69c2 100644
--- a/src/Symfony/Component/BrowserKit/Cookie.php
+++ b/src/Symfony/Component/BrowserKit/Cookie.php
@@ -22,7 +22,7 @@ class Cookie
      * Handles dates as defined by RFC 2616 section 3.3.1, and also some other
      * non-standard, but common formats.
      */
-    private static $dateFormats = array(
+    private static $dateFormats = [
         'D, d M Y H:i:s T',
         'D, d-M-y H:i:s T',
         'D, d-M-Y H:i:s T',
@@ -30,7 +30,7 @@ class Cookie
         'D, d-m-Y H:i:s T',
         'D M j G:i:s Y',
         'D M d H:i:s Y T',
-    );
+    ];
 
     protected $name;
     protected $value;
@@ -136,7 +136,7 @@ class Cookie
 
         list($name, $value) = explode('=', array_shift($parts), 2);
 
-        $values = array(
+        $values = [
             'name' => trim($name),
             'value' => trim($value),
             'expires' => null,
@@ -146,7 +146,7 @@ class Cookie
             'httponly' => false,
             'passedRawValue' => true,
             'samesite' => null,
-        );
+        ];
 
         if (null !== $url) {
             if ((false === $urlParts = parse_url($url)) || !isset($urlParts['host'])) {
diff --git a/src/Symfony/Component/BrowserKit/CookieJar.php b/src/Symfony/Component/BrowserKit/CookieJar.php
index 24eb9abedd..bce66197d3 100644
--- a/src/Symfony/Component/BrowserKit/CookieJar.php
+++ b/src/Symfony/Component/BrowserKit/CookieJar.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\BrowserKit;
  */
 class CookieJar
 {
-    protected $cookieJar = array();
+    protected $cookieJar = [];
 
     public function set(Cookie $cookie)
     {
@@ -84,7 +84,7 @@ class CookieJar
             // this should never happen but it allows for a better BC
             $domains = array_keys($this->cookieJar);
         } else {
-            $domains = array($domain);
+            $domains = [$domain];
         }
 
         foreach ($domains as $domain) {
@@ -105,7 +105,7 @@ class CookieJar
      */
     public function clear()
     {
-        $this->cookieJar = array();
+        $this->cookieJar = [];
     }
 
     /**
@@ -116,7 +116,7 @@ class CookieJar
      */
     public function updateFromSetCookie(array $setCookies, $uri = null)
     {
-        $cookies = array();
+        $cookies = [];
 
         foreach ($setCookies as $cookie) {
             foreach (explode(',', $cookie) as $i => $part) {
@@ -157,7 +157,7 @@ class CookieJar
     {
         $this->flushExpiredCookies();
 
-        $flattenedCookies = array();
+        $flattenedCookies = [];
         foreach ($this->cookieJar as $path) {
             foreach ($path as $cookies) {
                 foreach ($cookies as $cookie) {
@@ -181,8 +181,8 @@ class CookieJar
     {
         $this->flushExpiredCookies();
 
-        $parts = array_replace(array('path' => '/'), parse_url($uri));
-        $cookies = array();
+        $parts = array_replace(['path' => '/'], parse_url($uri));
+        $cookies = [];
         foreach ($this->cookieJar as $domain => $pathCookies) {
             if ($domain) {
                 $domain = '.'.ltrim($domain, '.');
diff --git a/src/Symfony/Component/BrowserKit/History.php b/src/Symfony/Component/BrowserKit/History.php
index beec17c6b4..8ed3fd17fe 100644
--- a/src/Symfony/Component/BrowserKit/History.php
+++ b/src/Symfony/Component/BrowserKit/History.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\BrowserKit;
  */
 class History
 {
-    protected $stack = array();
+    protected $stack = [];
     protected $position = -1;
 
     /**
@@ -26,7 +26,7 @@ class History
      */
     public function clear()
     {
-        $this->stack = array();
+        $this->stack = [];
         $this->position = -1;
     }
 
diff --git a/src/Symfony/Component/BrowserKit/Request.php b/src/Symfony/Component/BrowserKit/Request.php
index d06868660b..c1e7ba4ce8 100644
--- a/src/Symfony/Component/BrowserKit/Request.php
+++ b/src/Symfony/Component/BrowserKit/Request.php
@@ -33,7 +33,7 @@ class Request
      * @param array  $server     An array of server parameters
      * @param string $content    The raw body data
      */
-    public function __construct(string $uri, string $method, array $parameters = array(), array $files = array(), array $cookies = array(), array $server = array(), string $content = null)
+    public function __construct(string $uri, string $method, array $parameters = [], array $files = [], array $cookies = [], array $server = [], string $content = null)
     {
         $this->uri = $uri;
         $this->method = $method;
diff --git a/src/Symfony/Component/BrowserKit/Response.php b/src/Symfony/Component/BrowserKit/Response.php
index 845be10b68..fb59b9902f 100644
--- a/src/Symfony/Component/BrowserKit/Response.php
+++ b/src/Symfony/Component/BrowserKit/Response.php
@@ -33,7 +33,7 @@ class Response
      * @param int    $status  The response status code
      * @param array  $headers An array of headers
      */
-    public function __construct(string $content = '', int $status = 200, array $headers = array())
+    public function __construct(string $content = '', int $status = 200, array $headers = [])
     {
         $this->content = $content;
         $this->status = $status;
@@ -134,10 +134,10 @@ class Response
                     return \is_array($value) ? (\count($value) ? $value[0] : '') : $value;
                 }
 
-                return \is_array($value) ? $value : array($value);
+                return \is_array($value) ? $value : [$value];
             }
         }
 
-        return $first ? null : array();
+        return $first ? null : [];
     }
 }
diff --git a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
index e4cec8b393..58587d4b39 100644
--- a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
@@ -77,13 +77,13 @@ class ClientTest extends TestCase
 {
     public function testGetHistory()
     {
-        $client = new TestClient(array(), $history = new History());
+        $client = new TestClient([], $history = new History());
         $this->assertSame($history, $client->getHistory(), '->getHistory() returns the History');
     }
 
     public function testGetCookieJar()
     {
-        $client = new TestClient(array(), null, $cookieJar = new CookieJar());
+        $client = new TestClient([], null, $cookieJar = new CookieJar());
         $this->assertSame($cookieJar, $client->getCookieJar(), '->getCookieJar() returns the CookieJar');
     }
 
@@ -108,7 +108,7 @@ class ClientTest extends TestCase
     public function testXmlHttpRequest()
     {
         $client = new TestClient();
-        $client->xmlHttpRequest('GET', 'http://example.com/', array(), array(), array(), null, true);
+        $client->xmlHttpRequest('GET', 'http://example.com/', [], [], [], null, true);
         $this->assertEquals($client->getRequest()->getServer()['HTTP_X_REQUESTED_WITH'], 'XMLHttpRequest');
         $this->assertFalse($client->getServerParameter('HTTP_X_REQUESTED_WITH', false));
     }
@@ -116,7 +116,7 @@ class ClientTest extends TestCase
     public function testGetRequestWithIpAsHttpHost()
     {
         $client = new TestClient();
-        $client->request('GET', 'https://example.com/foo', array(), array(), array('HTTP_HOST' => '127.0.0.1'));
+        $client->request('GET', 'https://example.com/foo', [], [], ['HTTP_HOST' => '127.0.0.1']);
 
         $this->assertEquals('https://example.com/foo', $client->getRequest()->getUri());
         $headers = $client->getRequest()->getServer();
@@ -169,7 +169,7 @@ class ClientTest extends TestCase
         $json = '{"jsonrpc":"2.0","method":"echo","id":7,"params":["Hello World"]}';
 
         $client = new TestClient();
-        $client->request('POST', 'http://example.com/jsonrpc', array(), array(), array(), $json);
+        $client->request('POST', 'http://example.com/jsonrpc', [], [], [], $json);
         $this->assertEquals($json, $client->getRequest()->getContent());
     }
 
@@ -295,18 +295,18 @@ class ClientTest extends TestCase
     public function testRequestCookies()
     {
         $client = new TestClient();
-        $client->setNextResponse(new Response('<html><a href="/foo">foo</a></html>', 200, array('Set-Cookie' => 'foo=bar')));
+        $client->setNextResponse(new Response('<html><a href="/foo">foo</a></html>', 200, ['Set-Cookie' => 'foo=bar']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
-        $this->assertEquals(array('foo' => 'bar'), $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');
+        $this->assertEquals(['foo' => 'bar'], $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');
 
         $client->request('GET', 'bar');
-        $this->assertEquals(array('foo' => 'bar'), $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');
+        $this->assertEquals(['foo' => 'bar'], $client->getCookieJar()->allValues('http://www.example.com/foo/foobar'), '->request() updates the CookieJar');
     }
 
     public function testRequestSecureCookies()
     {
         $client = new TestClient();
-        $client->setNextResponse(new Response('<html><a href="/foo">foo</a></html>', 200, array('Set-Cookie' => 'foo=bar; path=/; secure')));
+        $client->setNextResponse(new Response('<html><a href="/foo">foo</a></html>', 200, ['Set-Cookie' => 'foo=bar; path=/; secure']));
         $client->request('GET', 'https://www.example.com/foo/foobar');
 
         $this->assertTrue($client->getCookieJar()->get('foo', '/', 'www.example.com')->isSecure());
@@ -375,12 +375,12 @@ class ClientTest extends TestCase
         $client->setNextResponse(new Response('<html><form name="signup" action="/foo"><input type="text" name="username" value="the username" /><input type="password" name="password" value="the password" /><input type="submit" value="Register" /></form></html>'));
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
-        $client->submitForm('Register', array(
+        $client->submitForm('Register', [
             'username' => 'new username',
             'password' => 'new password',
-        ), 'PUT', array(
+        ], 'PUT', [
             'HTTP_USER_AGENT' => 'Symfony User Agent',
-        ));
+        ]);
 
         $this->assertEquals('http://www.example.com/foo', $client->getRequest()->getUri(), '->submitForm() submit forms');
         $this->assertEquals('PUT', $client->getRequest()->getMethod(), '->submitForm() allows to change the method');
@@ -396,10 +396,10 @@ class ClientTest extends TestCase
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
         try {
-            $client->submitForm('Register', array(
+            $client->submitForm('Register', [
                 'username' => 'username',
                 'password' => 'password',
-            ), 'POST');
+            ], 'POST');
             $this->fail('->submitForm() throws a \InvalidArgumentException if the form could not be found');
         } catch (\Exception $e) {
             $this->assertInstanceOf('InvalidArgumentException', $e, '->submitForm() throws a \InvalidArgumentException if the form could not be found');
@@ -408,7 +408,7 @@ class ClientTest extends TestCase
 
     public function testSubmitPreserveAuth()
     {
-        $client = new TestClient(array('PHP_AUTH_USER' => 'foo', 'PHP_AUTH_PW' => 'bar'));
+        $client = new TestClient(['PHP_AUTH_USER' => 'foo', 'PHP_AUTH_PW' => 'bar']);
         $client->setNextResponse(new Response('<html><form action="/foo"><input type="submit" /></form></html>'));
         $crawler = $client->request('GET', 'http://www.example.com/foo/foobar');
 
@@ -434,9 +434,9 @@ class ClientTest extends TestCase
         $client = new TestClient();
         $client->setNextResponse(new Response('<html><form action="/foo"><input type="submit" /></form></html>'));
         $crawler = $client->request('GET', 'http://www.example.com/foo/foobar');
-        $headers = array('Accept-Language' => 'de');
+        $headers = ['Accept-Language' => 'de'];
 
-        $client->submit($crawler->filter('input')->form(), array(), $headers);
+        $client->submit($crawler->filter('input')->form(), [], $headers);
 
         $server = $client->getRequest()->getServer();
         $this->assertArrayHasKey('Accept-Language', $server);
@@ -456,26 +456,26 @@ class ClientTest extends TestCase
             $this->assertInstanceOf('LogicException', $e, '->followRedirect() throws a \LogicException if the request was not redirected');
         }
 
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
         $client->followRedirect();
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect if any');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() automatically follows redirects if followRedirects is true');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 201, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 201, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
         $this->assertEquals('http://www.example.com/foo/foobar', $client->getRequest()->getUri(), '->followRedirect() does not follow redirect if HTTP Code is not 30x');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 201, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 201, ['Location' => 'http://www.example.com/redirected']));
         $client->followRedirects(false);
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
@@ -490,12 +490,12 @@ class ClientTest extends TestCase
     public function testFollowRelativeRedirect()
     {
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => '/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect if any');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected:1234')));
+        $client->setNextResponse(new Response('', 302, ['Location' => '/redirected:1234']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
         $this->assertEquals('http://www.example.com/redirected:1234', $client->getRequest()->getUri(), '->followRedirect() follows relative urls');
     }
@@ -504,11 +504,11 @@ class ClientTest extends TestCase
     {
         $client = new TestClient();
         $client->setMaxRedirects(1);
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect if any');
 
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected2')));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected2']));
         try {
             $client->followRedirect();
             $this->fail('->followRedirect() throws a \LogicException if the request was redirected and limit of redirections was reached');
@@ -516,60 +516,60 @@ class ClientTest extends TestCase
             $this->assertInstanceOf('LogicException', $e, '->followRedirect() throws a \LogicException if the request was redirected and limit of redirections was reached');
         }
 
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect if any');
 
-        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected')));
+        $client->setNextResponse(new Response('', 302, ['Location' => '/redirected']));
         $client->request('GET', 'http://www.example.com/foo/foobar');
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows relative URLs');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array('Location' => '//www.example.org/')));
+        $client->setNextResponse(new Response('', 302, ['Location' => '//www.example.org/']));
         $client->request('GET', 'https://www.example.com/');
 
         $this->assertEquals('https://www.example.org/', $client->getRequest()->getUri(), '->followRedirect() follows protocol-relative URLs');
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array('Location' => 'http://www.example.com/redirected')));
-        $client->request('POST', 'http://www.example.com/foo/foobar', array('name' => 'bar'));
+        $client->setNextResponse(new Response('', 302, ['Location' => 'http://www.example.com/redirected']));
+        $client->request('POST', 'http://www.example.com/foo/foobar', ['name' => 'bar']);
 
         $this->assertEquals('GET', $client->getRequest()->getMethod(), '->followRedirect() uses a GET for 302');
-        $this->assertEquals(array(), $client->getRequest()->getParameters(), '->followRedirect() does not submit parameters when changing the method');
+        $this->assertEquals([], $client->getRequest()->getParameters(), '->followRedirect() does not submit parameters when changing the method');
     }
 
     public function testFollowRedirectWithCookies()
     {
         $client = new TestClient();
         $client->followRedirects(false);
-        $client->setNextResponse(new Response('', 302, array(
+        $client->setNextResponse(new Response('', 302, [
             'Location' => 'http://www.example.com/redirected',
             'Set-Cookie' => 'foo=bar',
-        )));
+        ]));
         $client->request('GET', 'http://www.example.com/');
-        $this->assertEquals(array(), $client->getRequest()->getCookies());
+        $this->assertEquals([], $client->getRequest()->getCookies());
         $client->followRedirect();
-        $this->assertEquals(array('foo' => 'bar'), $client->getRequest()->getCookies());
+        $this->assertEquals(['foo' => 'bar'], $client->getRequest()->getCookies());
     }
 
     public function testFollowRedirectWithHeaders()
     {
-        $headers = array(
+        $headers = [
             'HTTP_HOST' => 'www.example.com',
             'HTTP_USER_AGENT' => 'Symfony BrowserKit',
             'CONTENT_TYPE' => 'application/vnd.custom+xml',
             'HTTPS' => false,
-        );
+        ];
 
         $client = new TestClient();
         $client->followRedirects(false);
-        $client->setNextResponse(new Response('', 302, array(
+        $client->setNextResponse(new Response('', 302, [
             'Location' => 'http://www.example.com/redirected',
-        )));
-        $client->request('GET', 'http://www.example.com/', array(), array(), array(
+        ]));
+        $client->request('GET', 'http://www.example.com/', [], [], [
             'CONTENT_TYPE' => 'application/vnd.custom+xml',
-        ));
+        ]);
 
         $this->assertEquals($headers, $client->getRequest()->getServer());
 
@@ -582,17 +582,17 @@ class ClientTest extends TestCase
 
     public function testFollowRedirectWithPort()
     {
-        $headers = array(
+        $headers = [
             'HTTP_HOST' => 'www.example.com:8080',
             'HTTP_USER_AGENT' => 'Symfony BrowserKit',
             'HTTPS' => false,
             'HTTP_REFERER' => 'http://www.example.com:8080/',
-        );
+        ];
 
         $client = new TestClient();
-        $client->setNextResponse(new Response('', 302, array(
+        $client->setNextResponse(new Response('', 302, [
             'Location' => 'http://www.example.com:8080/redirected',
-        )));
+        ]));
         $client->request('GET', 'http://www.example.com:8080/');
 
         $this->assertEquals($headers, $client->getRequest()->getServer());
@@ -616,14 +616,14 @@ class ClientTest extends TestCase
 
     public function testFollowRedirectWithPostMethod()
     {
-        $parameters = array('foo' => 'bar');
-        $files = array('myfile.foo' => 'baz');
-        $server = array('X_TEST_FOO' => 'bazbar');
+        $parameters = ['foo' => 'bar'];
+        $files = ['myfile.foo' => 'baz'];
+        $server = ['X_TEST_FOO' => 'bazbar'];
         $content = 'foobarbaz';
 
         $client = new TestClient();
 
-        $client->setNextResponse(new Response('', 307, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 307, ['Location' => 'http://www.example.com/redirected']));
         $client->request('POST', 'http://www.example.com/foo/foobar', $parameters, $files, $server, $content);
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect with POST method');
@@ -636,15 +636,15 @@ class ClientTest extends TestCase
 
     public function testFollowRedirectDropPostMethod()
     {
-        $parameters = array('foo' => 'bar');
-        $files = array('myfile.foo' => 'baz');
-        $server = array('X_TEST_FOO' => 'bazbar');
+        $parameters = ['foo' => 'bar'];
+        $files = ['myfile.foo' => 'baz'];
+        $server = ['X_TEST_FOO' => 'bazbar'];
         $content = 'foobarbaz';
 
         $client = new TestClient();
 
-        foreach (array(301, 302, 303) as $code) {
-            $client->setNextResponse(new Response('', $code, array('Location' => 'http://www.example.com/redirected')));
+        foreach ([301, 302, 303] as $code) {
+            $client->setNextResponse(new Response('', $code, ['Location' => 'http://www.example.com/redirected']));
             $client->request('POST', 'http://www.example.com/foo/foobar', $parameters, $files, $server, $content);
 
             $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect with POST method on response code: '.$code.'.');
@@ -670,32 +670,32 @@ class ClientTest extends TestCase
 
     public function getTestsForMetaRefresh()
     {
-        return array(
-            array('<html><head><meta http-equiv="Refresh" content="4" /><meta http-equiv="refresh" content="0; URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content="0;URL=\'http://www.example.com/redirected\'"/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content=\'0;URL="http://www.example.com/redirected"\'/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content="0; URL = http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content="0;URL= http://www.example.com/redirected  "/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><meta http-equiv="refresh" content="0;url=http://www.example.com/redirected  "/></head></html>', 'http://www.example.com/redirected'),
-            array('<html><head><noscript><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></noscript></head></head></html>', 'http://www.example.com/redirected'),
+        return [
+            ['<html><head><meta http-equiv="Refresh" content="4" /><meta http-equiv="refresh" content="0; URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content="0;URL=\'http://www.example.com/redirected\'"/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content=\'0;URL="http://www.example.com/redirected"\'/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content="0; URL = http://www.example.com/redirected"/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content="0;URL= http://www.example.com/redirected  "/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><meta http-equiv="refresh" content="0;url=http://www.example.com/redirected  "/></head></html>', 'http://www.example.com/redirected'],
+            ['<html><head><noscript><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></noscript></head></head></html>', 'http://www.example.com/redirected'],
             // Non-zero timeout should not result in a redirect.
-            array('<html><head><meta http-equiv="refresh" content="4; URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/foo/foobar'),
-            array('<html><body></body></html>', 'http://www.example.com/foo/foobar'),
+            ['<html><head><meta http-equiv="refresh" content="4; URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/foo/foobar'],
+            ['<html><body></body></html>', 'http://www.example.com/foo/foobar'],
             // Invalid meta tag placement should not result in a redirect.
-            array('<html><body><meta http-equiv="refresh" content="0;url=http://www.example.com/redirected"/></body></html>', 'http://www.example.com/foo/foobar'),
+            ['<html><body><meta http-equiv="refresh" content="0;url=http://www.example.com/redirected"/></body></html>', 'http://www.example.com/foo/foobar'],
             // Valid meta refresh should not be followed if disabled.
-            array('<html><head><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/foo/foobar', false),
-        );
+            ['<html><head><meta http-equiv="refresh" content="0;URL=http://www.example.com/redirected"/></head></html>', 'http://www.example.com/foo/foobar', false],
+        ];
     }
 
     public function testBack()
     {
         $client = new TestClient();
 
-        $parameters = array('foo' => 'bar');
-        $files = array('myfile.foo' => 'baz');
-        $server = array('X_TEST_FOO' => 'bazbar');
+        $parameters = ['foo' => 'bar'];
+        $files = ['myfile.foo' => 'baz'];
+        $server = ['X_TEST_FOO' => 'bazbar'];
         $content = 'foobarbaz';
 
         $client->request('GET', 'http://www.example.com/foo/foobar', $parameters, $files, $server, $content);
@@ -713,9 +713,9 @@ class ClientTest extends TestCase
     {
         $client = new TestClient();
 
-        $parameters = array('foo' => 'bar');
-        $files = array('myfile.foo' => 'baz');
-        $server = array('X_TEST_FOO' => 'bazbar');
+        $parameters = ['foo' => 'bar'];
+        $files = ['myfile.foo' => 'baz'];
+        $server = ['X_TEST_FOO' => 'bazbar'];
         $content = 'foobarbaz';
 
         $client->request('GET', 'http://www.example.com/foo/foobar');
@@ -735,7 +735,7 @@ class ClientTest extends TestCase
         $client = new TestClient();
 
         $client->request('GET', 'http://www.example.com/foo');
-        $client->setNextResponse(new Response('', 301, array('Location' => 'http://www.example.com/redirected')));
+        $client->setNextResponse(new Response('', 301, ['Location' => 'http://www.example.com/redirected']));
         $client->request('GET', 'http://www.example.com/bar');
 
         $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), 'client followed redirect');
@@ -753,9 +753,9 @@ class ClientTest extends TestCase
     {
         $client = new TestClient();
 
-        $parameters = array('foo' => 'bar');
-        $files = array('myfile.foo' => 'baz');
-        $server = array('X_TEST_FOO' => 'bazbar');
+        $parameters = ['foo' => 'bar'];
+        $files = ['myfile.foo' => 'baz'];
+        $server = ['X_TEST_FOO' => 'bazbar'];
         $content = 'foobarbaz';
 
         $client->request('GET', 'http://www.example.com/foo/foobar', $parameters, $files, $server, $content);
@@ -775,7 +775,7 @@ class ClientTest extends TestCase
         $client->restart();
 
         $this->assertTrue($client->getHistory()->isEmpty(), '->restart() clears the history');
-        $this->assertEquals(array(), $client->getCookieJar()->all(), '->restart() clears the cookies');
+        $this->assertEquals([], $client->getCookieJar()->all(), '->restart() clears the cookies');
     }
 
     public function testInsulatedRequests()
@@ -826,12 +826,12 @@ class ClientTest extends TestCase
         $this->assertEquals('', $client->getServerParameter('HTTP_HOST'));
         $this->assertEquals('Symfony BrowserKit', $client->getServerParameter('HTTP_USER_AGENT'));
 
-        $client->request('GET', 'https://www.example.com/https/www.example.com', array(), array(), array(
+        $client->request('GET', 'https://www.example.com/https/www.example.com', [], [], [
             'HTTP_HOST' => 'testhost',
             'HTTP_USER_AGENT' => 'testua',
             'HTTPS' => false,
             'NEW_SERVER_KEY' => 'new-server-key-value',
-        ));
+        ]);
 
         $this->assertEquals('', $client->getServerParameter('HTTP_HOST'));
         $this->assertEquals('Symfony BrowserKit', $client->getServerParameter('HTTP_USER_AGENT'));
@@ -857,16 +857,16 @@ class ClientTest extends TestCase
     {
         $client = new TestClient();
 
-        $client->request('GET', '/', array(), array(), array(
+        $client->request('GET', '/', [], [], [
             'HTTP_HOST' => 'testhost',
             'HTTPS' => true,
-        ));
+        ]);
         $this->assertEquals('https://testhost/', $client->getRequest()->getUri());
 
-        $client->request('GET', 'https://www.example.com/', array(), array(), array(
+        $client->request('GET', 'https://www.example.com/', [], [], [
             'HTTP_HOST' => 'testhost',
             'HTTPS' => false,
-        ));
+        ]);
         $this->assertEquals('https://www.example.com/', $client->getRequest()->getUri());
     }
 
@@ -874,12 +874,12 @@ class ClientTest extends TestCase
     {
         $client = new TestClient();
 
-        $client->request('GET', 'https://www.example.com/https/www.example.com', array(), array(), array(
+        $client->request('GET', 'https://www.example.com/https/www.example.com', [], [], [
             'HTTP_HOST' => 'testhost',
             'HTTP_USER_AGENT' => 'testua',
             'HTTPS' => false,
             'NEW_SERVER_KEY' => 'new-server-key-value',
-        ));
+        ]);
 
         $this->assertInstanceOf('Symfony\Component\BrowserKit\Request', $client->getInternalRequest());
     }
@@ -896,7 +896,7 @@ class ClientTest extends TestCase
 
     /**
      * @group legacy
-     * @expectedDeprecation The "Symfony\Component\BrowserKit\Client::submit()" method will have a new "array $serverParameters = array()" argument in version 5.0, not defining it is deprecated since Symfony 4.2.
+     * @expectedDeprecation The "Symfony\Component\BrowserKit\Client::submit()" method will have a new "array $serverParameters = []" argument in version 5.0, not defining it is deprecated since Symfony 4.2.
      */
     public function testInheritedClassCallSubmitWithTwoArguments()
     {
@@ -927,7 +927,7 @@ class ClassThatInheritClient extends Client
         return $response;
     }
 
-    public function submit(DomCrawlerForm $form, array $values = array())
+    public function submit(DomCrawlerForm $form, array $values = [])
     {
         return parent::submit($form, $values);
     }
diff --git a/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php b/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
index 3117e5ce47..d88f0234c6 100644
--- a/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/CookieJarTest.php
@@ -45,7 +45,7 @@ class CookieJarTest extends TestCase
         $cookieJar->set($cookie1 = new Cookie('foo', 'bar'));
         $cookieJar->set($cookie2 = new Cookie('bar', 'foo'));
 
-        $this->assertEquals(array($cookie1, $cookie2), $cookieJar->all(), '->all() returns all cookies in the jar');
+        $this->assertEquals([$cookie1, $cookie2], $cookieJar->all(), '->all() returns all cookies in the jar');
     }
 
     public function testClear()
@@ -56,12 +56,12 @@ class CookieJarTest extends TestCase
 
         $cookieJar->clear();
 
-        $this->assertEquals(array(), $cookieJar->all(), '->clear() expires all cookies');
+        $this->assertEquals([], $cookieJar->all(), '->clear() expires all cookies');
     }
 
     public function testUpdateFromResponse()
     {
-        $response = new Response('', 200, array('Set-Cookie' => 'foo=foo'));
+        $response = new Response('', 200, ['Set-Cookie' => 'foo=foo']);
 
         $cookieJar = new CookieJar();
         $cookieJar->updateFromResponse($response);
@@ -71,7 +71,7 @@ class CookieJarTest extends TestCase
 
     public function testUpdateFromSetCookie()
     {
-        $setCookies = array('foo=foo');
+        $setCookies = ['foo=foo'];
 
         $cookieJar = new CookieJar();
         $cookieJar->set(new Cookie('bar', 'bar'));
@@ -86,15 +86,15 @@ class CookieJarTest extends TestCase
     public function testUpdateFromEmptySetCookie()
     {
         $cookieJar = new CookieJar();
-        $cookieJar->updateFromSetCookie(array(''));
-        $this->assertEquals(array(), $cookieJar->all());
+        $cookieJar->updateFromSetCookie(['']);
+        $this->assertEquals([], $cookieJar->all());
     }
 
     public function testUpdateFromSetCookieWithMultipleCookies()
     {
         $timestamp = time() + 3600;
         $date = gmdate('D, d M Y H:i:s \G\M\T', $timestamp);
-        $setCookies = array(sprintf('foo=foo; expires=%s; domain=.symfony.com; path=/, bar=bar; domain=.blog.symfony.com, PHPSESSID=id; expires=%1$s', $date));
+        $setCookies = [sprintf('foo=foo; expires=%s; domain=.symfony.com; path=/, bar=bar; domain=.blog.symfony.com, PHPSESSID=id; expires=%1$s', $date)];
 
         $cookieJar = new CookieJar();
         $cookieJar->updateFromSetCookie($setCookies);
@@ -132,15 +132,15 @@ class CookieJarTest extends TestCase
 
     public function provideAllValuesValues()
     {
-        return array(
-            array('http://www.example.com', array('foo_nothing', 'foo_domain')),
-            array('http://www.example.com/', array('foo_nothing', 'foo_domain')),
-            array('http://foo.example.com/', array('foo_nothing', 'foo_domain')),
-            array('http://foo.example1.com/', array('foo_nothing')),
-            array('https://foo.example.com/', array('foo_nothing', 'foo_secure', 'foo_domain')),
-            array('http://www.example.com/foo/bar', array('foo_nothing', 'foo_path', 'foo_domain')),
-            array('http://www4.example.com/', array('foo_nothing', 'foo_domain', 'foo_strict_domain')),
-        );
+        return [
+            ['http://www.example.com', ['foo_nothing', 'foo_domain']],
+            ['http://www.example.com/', ['foo_nothing', 'foo_domain']],
+            ['http://foo.example.com/', ['foo_nothing', 'foo_domain']],
+            ['http://foo.example1.com/', ['foo_nothing']],
+            ['https://foo.example.com/', ['foo_nothing', 'foo_secure', 'foo_domain']],
+            ['http://www.example.com/foo/bar', ['foo_nothing', 'foo_path', 'foo_domain']],
+            ['http://www4.example.com/', ['foo_nothing', 'foo_domain', 'foo_strict_domain']],
+        ];
     }
 
     public function testEncodedValues()
@@ -148,8 +148,8 @@ class CookieJarTest extends TestCase
         $cookieJar = new CookieJar();
         $cookieJar->set($cookie = new Cookie('foo', 'bar%3Dbaz', null, '/', '', false, true, true));
 
-        $this->assertEquals(array('foo' => 'bar=baz'), $cookieJar->allValues('/'));
-        $this->assertEquals(array('foo' => 'bar%3Dbaz'), $cookieJar->allRawValues('/'));
+        $this->assertEquals(['foo' => 'bar=baz'], $cookieJar->allValues('/'));
+        $this->assertEquals(['foo' => 'bar%3Dbaz'], $cookieJar->allRawValues('/'));
     }
 
     public function testCookieExpireWithSameNameButDifferentPaths()
@@ -160,9 +160,9 @@ class CookieJarTest extends TestCase
         $cookieJar->expire('foo', '/foo');
 
         $this->assertNull($cookieJar->get('foo'), '->get() returns null if the cookie is expired');
-        $this->assertEquals(array(), array_keys($cookieJar->allValues('http://example.com/')));
-        $this->assertEquals(array(), $cookieJar->allValues('http://example.com/foo'));
-        $this->assertEquals(array('foo' => 'bar2'), $cookieJar->allValues('http://example.com/bar'));
+        $this->assertEquals([], array_keys($cookieJar->allValues('http://example.com/')));
+        $this->assertEquals([], $cookieJar->allValues('http://example.com/foo'));
+        $this->assertEquals(['foo' => 'bar2'], $cookieJar->allValues('http://example.com/bar'));
     }
 
     public function testCookieExpireWithNullPaths()
@@ -172,7 +172,7 @@ class CookieJarTest extends TestCase
         $cookieJar->expire('foo', null);
 
         $this->assertNull($cookieJar->get('foo'), '->get() returns null if the cookie is expired');
-        $this->assertEquals(array(), array_keys($cookieJar->allValues('http://example.com/')));
+        $this->assertEquals([], array_keys($cookieJar->allValues('http://example.com/')));
     }
 
     public function testCookieExpireWithDomain()
@@ -182,7 +182,7 @@ class CookieJarTest extends TestCase
         $cookieJar->expire('foo', '/foo', 'http://example2.com/');
 
         $this->assertNull($cookieJar->get('foo'), '->get() returns null if the cookie is expired');
-        $this->assertEquals(array(), array_keys($cookieJar->allValues('http://example2.com/')));
+        $this->assertEquals([], array_keys($cookieJar->allValues('http://example2.com/')));
     }
 
     public function testCookieWithSameNameButDifferentPaths()
@@ -191,9 +191,9 @@ class CookieJarTest extends TestCase
         $cookieJar->set($cookie1 = new Cookie('foo', 'bar1', null, '/foo'));
         $cookieJar->set($cookie2 = new Cookie('foo', 'bar2', null, '/bar'));
 
-        $this->assertEquals(array(), array_keys($cookieJar->allValues('http://example.com/')));
-        $this->assertEquals(array('foo' => 'bar1'), $cookieJar->allValues('http://example.com/foo'));
-        $this->assertEquals(array('foo' => 'bar2'), $cookieJar->allValues('http://example.com/bar'));
+        $this->assertEquals([], array_keys($cookieJar->allValues('http://example.com/')));
+        $this->assertEquals(['foo' => 'bar1'], $cookieJar->allValues('http://example.com/foo'));
+        $this->assertEquals(['foo' => 'bar2'], $cookieJar->allValues('http://example.com/bar'));
     }
 
     public function testCookieWithSameNameButDifferentDomains()
@@ -202,9 +202,9 @@ class CookieJarTest extends TestCase
         $cookieJar->set($cookie1 = new Cookie('foo', 'bar1', null, '/', 'foo.example.com'));
         $cookieJar->set($cookie2 = new Cookie('foo', 'bar2', null, '/', 'bar.example.com'));
 
-        $this->assertEquals(array(), array_keys($cookieJar->allValues('http://example.com/')));
-        $this->assertEquals(array('foo' => 'bar1'), $cookieJar->allValues('http://foo.example.com/'));
-        $this->assertEquals(array('foo' => 'bar2'), $cookieJar->allValues('http://bar.example.com/'));
+        $this->assertEquals([], array_keys($cookieJar->allValues('http://example.com/')));
+        $this->assertEquals(['foo' => 'bar1'], $cookieJar->allValues('http://foo.example.com/'));
+        $this->assertEquals(['foo' => 'bar2'], $cookieJar->allValues('http://bar.example.com/'));
     }
 
     public function testCookieGetWithSubdomain()
@@ -246,7 +246,7 @@ class CookieJarTest extends TestCase
         $cookieJar = new CookieJar();
         $cookieJar->set(new Cookie('foo', 'bar', null, '/', '.example.com'));
 
-        $this->assertEquals(array('foo' => 'bar'), $cookieJar->allValues('http://www.example.com'));
+        $this->assertEquals(['foo' => 'bar'], $cookieJar->allValues('http://www.example.com'));
         $this->assertEmpty($cookieJar->allValues('http://wwwexample.com'));
     }
 }
diff --git a/src/Symfony/Component/BrowserKit/Tests/CookieTest.php b/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
index 838da8ef14..9763795b30 100644
--- a/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/CookieTest.php
@@ -44,16 +44,16 @@ class CookieTest extends TestCase
 
     public function getTestsForToFromString()
     {
-        return array(
-            array('foo=bar; path=/'),
-            array('foo=bar; path=/foo'),
-            array('foo=bar; domain=google.com; path=/'),
-            array('foo=bar; domain=example.com; path=/; secure', 'https://example.com/'),
-            array('foo=bar; path=/; httponly'),
-            array('foo=bar; domain=google.com; path=/foo; secure; httponly', 'https://google.com/'),
-            array('foo=bar=baz; path=/'),
-            array('foo=bar%3Dbaz; path=/'),
-        );
+        return [
+            ['foo=bar; path=/'],
+            ['foo=bar; path=/foo'],
+            ['foo=bar; domain=google.com; path=/'],
+            ['foo=bar; domain=example.com; path=/; secure', 'https://example.com/'],
+            ['foo=bar; path=/; httponly'],
+            ['foo=bar; domain=google.com; path=/foo; secure; httponly', 'https://google.com/'],
+            ['foo=bar=baz; path=/'],
+            ['foo=bar%3Dbaz; path=/'],
+        ];
     }
 
     public function testFromStringIgnoreSecureFlag()
@@ -72,16 +72,16 @@ class CookieTest extends TestCase
 
     public function getExpireCookieStrings()
     {
-        return array(
-            array('foo=bar; expires=Fri, 31-Jul-2020 08:49:37 GMT'),
-            array('foo=bar; expires=Fri, 31 Jul 2020 08:49:37 GMT'),
-            array('foo=bar; expires=Fri, 31-07-2020 08:49:37 GMT'),
-            array('foo=bar; expires=Fri, 31-07-20 08:49:37 GMT'),
-            array('foo=bar; expires=Friday, 31-Jul-20 08:49:37 GMT'),
-            array('foo=bar; expires=Fri Jul 31 08:49:37 2020'),
-            array('foo=bar; expires=\'Fri Jul 31 08:49:37 2020\''),
-            array('foo=bar; expires=Friday July 31st 2020, 08:49:37 GMT'),
-        );
+        return [
+            ['foo=bar; expires=Fri, 31-Jul-2020 08:49:37 GMT'],
+            ['foo=bar; expires=Fri, 31 Jul 2020 08:49:37 GMT'],
+            ['foo=bar; expires=Fri, 31-07-2020 08:49:37 GMT'],
+            ['foo=bar; expires=Fri, 31-07-20 08:49:37 GMT'],
+            ['foo=bar; expires=Friday, 31-Jul-20 08:49:37 GMT'],
+            ['foo=bar; expires=Fri Jul 31 08:49:37 2020'],
+            ['foo=bar; expires=\'Fri Jul 31 08:49:37 2020\''],
+            ['foo=bar; expires=Friday July 31st 2020, 08:49:37 GMT'],
+        ];
     }
 
     public function testFromStringWithCapitalization()
diff --git a/src/Symfony/Component/BrowserKit/Tests/RequestTest.php b/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
index f163de9674..e7718eef87 100644
--- a/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/RequestTest.php
@@ -30,25 +30,25 @@ class RequestTest extends TestCase
 
     public function testGetParameters()
     {
-        $request = new Request('http://www.example.com/', 'get', array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $request->getParameters(), '->getParameters() returns the parameters of the request');
+        $request = new Request('http://www.example.com/', 'get', ['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $request->getParameters(), '->getParameters() returns the parameters of the request');
     }
 
     public function testGetFiles()
     {
-        $request = new Request('http://www.example.com/', 'get', array(), array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $request->getFiles(), '->getFiles() returns the uploaded files of the request');
+        $request = new Request('http://www.example.com/', 'get', [], ['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $request->getFiles(), '->getFiles() returns the uploaded files of the request');
     }
 
     public function testGetCookies()
     {
-        $request = new Request('http://www.example.com/', 'get', array(), array(), array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $request->getCookies(), '->getCookies() returns the cookies of the request');
+        $request = new Request('http://www.example.com/', 'get', [], [], ['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $request->getCookies(), '->getCookies() returns the cookies of the request');
     }
 
     public function testGetServer()
     {
-        $request = new Request('http://www.example.com/', 'get', array(), array(), array(), array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $request->getServer(), '->getServer() returns the server parameters of the request');
+        $request = new Request('http://www.example.com/', 'get', [], [], [], ['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $request->getServer(), '->getServer() returns the server parameters of the request');
     }
 }
diff --git a/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php b/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
index 8afebe454c..bac629f732 100644
--- a/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/ResponseTest.php
@@ -39,40 +39,40 @@ class ResponseTest extends TestCase
 
     public function testGetHeaders()
     {
-        $response = new Response('foo', 200, array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $response->getHeaders(), '->getHeaders() returns the headers of the response');
+        $response = new Response('foo', 200, ['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $response->getHeaders(), '->getHeaders() returns the headers of the response');
     }
 
     public function testGetHeader()
     {
-        $response = new Response('foo', 200, array(
+        $response = new Response('foo', 200, [
             'Content-Type' => 'text/html',
-            'Set-Cookie' => array('foo=bar', 'bar=foo'),
-        ));
+            'Set-Cookie' => ['foo=bar', 'bar=foo'],
+        ]);
 
         $this->assertEquals('text/html', $response->getHeader('Content-Type'), '->getHeader() returns a header of the response');
         $this->assertEquals('text/html', $response->getHeader('content-type'), '->getHeader() returns a header of the response');
         $this->assertEquals('text/html', $response->getHeader('content_type'), '->getHeader() returns a header of the response');
         $this->assertEquals('foo=bar', $response->getHeader('Set-Cookie'), '->getHeader() returns the first header value');
-        $this->assertEquals(array('foo=bar', 'bar=foo'), $response->getHeader('Set-Cookie', false), '->getHeader() returns all header values if first is false');
+        $this->assertEquals(['foo=bar', 'bar=foo'], $response->getHeader('Set-Cookie', false), '->getHeader() returns all header values if first is false');
 
         $this->assertNull($response->getHeader('foo'), '->getHeader() returns null if the header is not defined');
-        $this->assertEquals(array(), $response->getHeader('foo', false), '->getHeader() returns an empty array if the header is not defined and first is set to false');
+        $this->assertEquals([], $response->getHeader('foo', false), '->getHeader() returns an empty array if the header is not defined and first is set to false');
     }
 
     public function testMagicToString()
     {
-        $response = new Response('foo', 304, array('foo' => 'bar'));
+        $response = new Response('foo', 304, ['foo' => 'bar']);
 
         $this->assertEquals("foo: bar\n\nfoo", $response->__toString(), '->__toString() returns the headers and the content as a string');
     }
 
     public function testMagicToStringWithMultipleSetCookieHeader()
     {
-        $headers = array(
+        $headers = [
             'content-type' => 'text/html; charset=utf-8',
-            'set-cookie' => array('foo=bar', 'bar=foo'),
-        );
+            'set-cookie' => ['foo=bar', 'bar=foo'],
+        ];
 
         $expected = 'content-type: text/html; charset=utf-8'."\n";
         $expected .= 'set-cookie: foo=bar'."\n";
diff --git a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
index 571eb1468a..d93ae711bd 100644
--- a/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/AbstractAdapter.php
@@ -64,12 +64,12 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
             null,
             CacheItem::class
         );
-        $getId = \Closure::fromCallable(array($this, 'getId'));
+        $getId = \Closure::fromCallable([$this, 'getId']);
         $this->mergeByLifetime = \Closure::bind(
             function ($deferred, $namespace, &$expiredIds) use ($getId) {
-                $byLifetime = array();
+                $byLifetime = [];
                 $now = microtime(true);
-                $expiredIds = array();
+                $expiredIds = [];
 
                 foreach ($deferred as $key => $item) {
                     $key = (string) $key;
@@ -83,7 +83,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
                         unset($metadata[CacheItem::METADATA_TAGS]);
                     }
                     // For compactness, expiry and creation duration are packed in the key of an array, using magic numbers as separators
-                    $byLifetime[$ttl][$getId($key)] = $metadata ? array("\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - CacheItem::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $item->value) : $item->value;
+                    $byLifetime[$ttl][$getId($key)] = $metadata ? ["\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - CacheItem::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $item->value] : $item->value;
                 }
 
                 return $byLifetime;
@@ -131,7 +131,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
         return $apcu;
     }
 
-    public static function createConnection($dsn, array $options = array())
+    public static function createConnection($dsn, array $options = [])
     {
         if (!\is_string($dsn)) {
             throw new InvalidArgumentException(sprintf('The %s() method expect argument #1 to be string, %s given.', __METHOD__, \gettype($dsn)));
@@ -161,11 +161,11 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
         $value = null;
 
         try {
-            foreach ($this->doFetch(array($id)) as $value) {
+            foreach ($this->doFetch([$id]) as $value) {
                 $isHit = true;
             }
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch key "{key}"', array('key' => $key, 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to fetch key "{key}"', ['key' => $key, 'exception' => $e]);
         }
 
         return $f($key, $value, $isHit);
@@ -174,12 +174,12 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         if ($this->deferred) {
             $this->commit();
         }
-        $ids = array();
+        $ids = [];
 
         foreach ($keys as $key) {
             $ids[] = $this->getId($key);
@@ -187,8 +187,8 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
         try {
             $items = $this->doFetch($ids);
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch requested items', array('keys' => $keys, 'exception' => $e));
-            $items = array();
+            CacheItem::log($this->logger, 'Failed to fetch requested items', ['keys' => $keys, 'exception' => $e]);
+            $items = [];
         }
         $ids = array_combine($ids, $keys);
 
@@ -229,7 +229,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
         $ok = true;
         $byLifetime = $this->mergeByLifetime;
         $byLifetime = $byLifetime($this->deferred, $this->namespace, $expiredIds);
-        $retry = $this->deferred = array();
+        $retry = $this->deferred = [];
 
         if ($expiredIds) {
             $this->doDelete($expiredIds);
@@ -239,7 +239,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
                 $e = $this->doSave($values, $lifetime);
             } catch (\Exception $e) {
             }
-            if (true === $e || array() === $e) {
+            if (true === $e || [] === $e) {
                 continue;
             }
             if (\is_array($e) || 1 === \count($values)) {
@@ -247,7 +247,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
                     $ok = false;
                     $v = $values[$id];
                     $type = \is_object($v) ? \get_class($v) : \gettype($v);
-                    CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', array('key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null));
+                    CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', ['key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null]);
                 }
             } else {
                 foreach ($values as $id => $v) {
@@ -261,15 +261,15 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
             foreach ($ids as $id) {
                 try {
                     $v = $byLifetime[$lifetime][$id];
-                    $e = $this->doSave(array($id => $v), $lifetime);
+                    $e = $this->doSave([$id => $v], $lifetime);
                 } catch (\Exception $e) {
                 }
-                if (true === $e || array() === $e) {
+                if (true === $e || [] === $e) {
                     continue;
                 }
                 $ok = false;
                 $type = \is_object($v) ? \get_class($v) : \gettype($v);
-                CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', array('key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null));
+                CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', ['key' => substr($id, \strlen($this->namespace)), 'type' => $type, 'exception' => $e instanceof \Exception ? $e : null]);
             }
         }
 
@@ -297,7 +297,7 @@ abstract class AbstractAdapter implements AdapterInterface, CacheInterface, Logg
                 yield $key => $f($key, $value, true);
             }
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch requested items', array('keys' => array_values($keys), 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to fetch requested items', ['keys' => array_values($keys), 'exception' => $e]);
         }
 
         foreach ($keys as $key) {
diff --git a/src/Symfony/Component/Cache/Adapter/AdapterInterface.php b/src/Symfony/Component/Cache/Adapter/AdapterInterface.php
index 41222c1ab5..85fe07684f 100644
--- a/src/Symfony/Component/Cache/Adapter/AdapterInterface.php
+++ b/src/Symfony/Component/Cache/Adapter/AdapterInterface.php
@@ -33,5 +33,5 @@ interface AdapterInterface extends CacheItemPoolInterface
      *
      * @return \Traversable|CacheItem[]
      */
-    public function getItems(array $keys = array());
+    public function getItems(array $keys = []);
 }
diff --git a/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php b/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
index 97b6b7f780..bbb1f846e4 100644
--- a/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ArrayAdapter.php
@@ -83,7 +83,7 @@ class ArrayAdapter implements AdapterInterface, CacheInterface, LoggerAwareInter
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         foreach ($keys as $key) {
             if (!\is_string($key) || !isset($this->expiries[$key])) {
diff --git a/src/Symfony/Component/Cache/Adapter/ChainAdapter.php b/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
index 0417a22cd1..80aa7c6d1b 100644
--- a/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ChainAdapter.php
@@ -33,7 +33,7 @@ class ChainAdapter implements AdapterInterface, CacheInterface, PruneableInterfa
 {
     use ContractsTrait;
 
-    private $adapters = array();
+    private $adapters = [];
     private $adapterCount;
     private $syncItem;
 
@@ -118,7 +118,7 @@ class ChainAdapter implements AdapterInterface, CacheInterface, PruneableInterfa
     public function getItem($key)
     {
         $syncItem = $this->syncItem;
-        $misses = array();
+        $misses = [];
 
         foreach ($this->adapters as $i => $adapter) {
             $item = $adapter->getItem($key);
@@ -140,15 +140,15 @@ class ChainAdapter implements AdapterInterface, CacheInterface, PruneableInterfa
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         return $this->generateItems($this->adapters[0]->getItems($keys), 0);
     }
 
     private function generateItems($items, $adapterIndex)
     {
-        $missing = array();
-        $misses = array();
+        $missing = [];
+        $misses = [];
         $nextAdapterIndex = $adapterIndex + 1;
         $nextAdapter = isset($this->adapters[$nextAdapterIndex]) ? $this->adapters[$nextAdapterIndex] : null;
 
diff --git a/src/Symfony/Component/Cache/Adapter/NullAdapter.php b/src/Symfony/Component/Cache/Adapter/NullAdapter.php
index 3c88a6902a..50f2d68a66 100644
--- a/src/Symfony/Component/Cache/Adapter/NullAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/NullAdapter.php
@@ -58,7 +58,7 @@ class NullAdapter implements AdapterInterface, CacheInterface
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         return $this->generateItems($keys);
     }
diff --git a/src/Symfony/Component/Cache/Adapter/PdoAdapter.php b/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
index eb35fb38a9..d118736aec 100644
--- a/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PdoAdapter.php
@@ -39,7 +39,7 @@ class PdoAdapter extends AbstractAdapter implements PruneableInterface
      *  * db_time_col: The column where to store the timestamp [default: item_time]
      *  * db_username: The username when lazy-connect [default: '']
      *  * db_password: The password when lazy-connect [default: '']
-     *  * db_connection_options: An array of driver-specific connection options [default: array()]
+     *  * db_connection_options: An array of driver-specific connection options [default: []]
      *
      * @param \PDO|Connection|string $connOrDsn a \PDO or Connection instance or DSN string or null
      *
@@ -47,7 +47,7 @@ class PdoAdapter extends AbstractAdapter implements PruneableInterface
      * @throws InvalidArgumentException When PDO error mode is not PDO::ERRMODE_EXCEPTION
      * @throws InvalidArgumentException When namespace contains invalid characters
      */
-    public function __construct($connOrDsn, string $namespace = '', int $defaultLifetime = 0, array $options = array(), MarshallerInterface $marshaller = null)
+    public function __construct($connOrDsn, string $namespace = '', int $defaultLifetime = 0, array $options = [], MarshallerInterface $marshaller = null)
     {
         $this->init($connOrDsn, $namespace, $defaultLifetime, $options, $marshaller);
     }
diff --git a/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php b/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
index a145a361d1..129a9e7df4 100644
--- a/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/PhpArrayAdapter.php
@@ -149,7 +149,7 @@ class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInte
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         foreach ($keys as $key) {
             if (!\is_string($key)) {
@@ -199,7 +199,7 @@ class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInte
     public function deleteItems(array $keys)
     {
         $deleted = true;
-        $fallbackKeys = array();
+        $fallbackKeys = [];
 
         foreach ($keys as $key) {
             if (!\is_string($key)) {
@@ -258,7 +258,7 @@ class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInte
     private function generateItems(array $keys): \Generator
     {
         $f = $this->createCacheItem;
-        $fallbackKeys = array();
+        $fallbackKeys = [];
 
         foreach ($keys as $key) {
             if (isset($this->keys[$key])) {
@@ -294,10 +294,10 @@ class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInte
     {
         $e = new \ReflectionException("Class $class does not exist");
         $trace = $e->getTrace();
-        $autoloadFrame = array(
+        $autoloadFrame = [
             'function' => 'spl_autoload_call',
-            'args' => array($class),
-        );
+            'args' => [$class],
+        ];
         $i = 1 + array_search($autoloadFrame, $trace, true);
 
         if (isset($trace[$i]['function']) && !isset($trace[$i]['class'])) {
diff --git a/src/Symfony/Component/Cache/Adapter/ProxyAdapter.php b/src/Symfony/Component/Cache/Adapter/ProxyAdapter.php
index d6b888788d..f7536b1ee2 100644
--- a/src/Symfony/Component/Cache/Adapter/ProxyAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/ProxyAdapter.php
@@ -78,7 +78,7 @@ class ProxyAdapter implements AdapterInterface, CacheInterface, PruneableInterfa
                 }
                 if ($metadata) {
                     // For compactness, expiry and creation duration are packed in the key of an array, using magic numbers as separators
-                    $item["\0*\0value"] = array("\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - CacheItem::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $item["\0*\0value"]);
+                    $item["\0*\0value"] = ["\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - CacheItem::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $item["\0*\0value"]];
                 }
                 $innerItem->set($item["\0*\0value"]);
                 $innerItem->expiresAt(null !== $item["\0*\0expiry"] ? \DateTime::createFromFormat('U.u', sprintf('%.6f', $item["\0*\0expiry"])) : null);
@@ -120,7 +120,7 @@ class ProxyAdapter implements AdapterInterface, CacheInterface, PruneableInterfa
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         if ($this->namespaceLen) {
             foreach ($keys as $i => $key) {
diff --git a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
index 4144ffea74..e54044b60a 100644
--- a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
@@ -30,13 +30,13 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
     use ProxyTrait;
     use ContractsTrait;
 
-    private $deferred = array();
+    private $deferred = [];
     private $createCacheItem;
     private $setCacheItemTags;
     private $getTagsByKey;
     private $invalidateTags;
     private $tags;
-    private $knownTagVersions = array();
+    private $knownTagVersions = [];
     private $knownTagVersionsTtl;
 
     public function __construct(AdapterInterface $itemsPool, AdapterInterface $tagsPool = null, float $knownTagVersionsTtl = 0.15)
@@ -82,9 +82,9 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         );
         $this->getTagsByKey = \Closure::bind(
             function ($deferred) {
-                $tagsByKey = array();
+                $tagsByKey = [];
                 foreach ($deferred as $key => $item) {
-                    $tagsByKey[$key] = $item->newMetadata[CacheItem::METADATA_TAGS] ?? array();
+                    $tagsByKey[$key] = $item->newMetadata[CacheItem::METADATA_TAGS] ?? [];
                 }
 
                 return $tagsByKey;
@@ -113,8 +113,8 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
     public function invalidateTags(array $tags)
     {
         $ok = true;
-        $tagsByKey = array();
-        $invalidatedTags = array();
+        $tagsByKey = [];
+        $invalidatedTags = [];
         foreach ($tags as $tag) {
             CacheItem::validateKey($tag);
             $invalidatedTags[$tag] = 0;
@@ -131,7 +131,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
 
             $f = $this->getTagsByKey;
             $tagsByKey = $f($items);
-            $this->deferred = array();
+            $this->deferred = [];
         }
 
         $tagVersions = $this->getTagVersions($tagsByKey, $invalidatedTags);
@@ -165,7 +165,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
             return true;
         }
 
-        foreach ($this->getTagVersions(array($itemTags)) as $tag => $version) {
+        foreach ($this->getTagVersions([$itemTags]) as $tag => $version) {
             if ($itemTags[$tag] !== $version && 1 !== $itemTags[$tag] - $version) {
                 return false;
             }
@@ -179,7 +179,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
      */
     public function getItem($key)
     {
-        foreach ($this->getItems(array($key)) as $item) {
+        foreach ($this->getItems([$key]) as $item) {
             return $item;
         }
     }
@@ -187,12 +187,12 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         if ($this->deferred) {
             $this->commit();
         }
-        $tagKeys = array();
+        $tagKeys = [];
 
         foreach ($keys as $key) {
             if ('' !== $key && \is_string($key)) {
@@ -217,7 +217,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
      */
     public function clear()
     {
-        $this->deferred = array();
+        $this->deferred = [];
 
         return $this->pool->clear();
     }
@@ -227,7 +227,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
      */
     public function deleteItem($key)
     {
-        return $this->deleteItems(array($key));
+        return $this->deleteItems([$key]);
     }
 
     /**
@@ -275,7 +275,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
      */
     public function commit()
     {
-        return $this->invalidateTags(array());
+        return $this->invalidateTags([]);
     }
 
     public function __destruct()
@@ -285,7 +285,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
 
     private function generateItems($items, array $tagKeys)
     {
-        $bufferedItems = $itemTags = array();
+        $bufferedItems = $itemTags = [];
         $f = $this->setCacheItemTags;
 
         foreach ($items as $key => $item) {
@@ -299,7 +299,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
             }
 
             unset($tagKeys[$key]);
-            $itemTags[$key] = $item->get() ?: array();
+            $itemTags[$key] = $item->get() ?: [];
 
             if (!$tagKeys) {
                 $tagVersions = $this->getTagVersions($itemTags);
@@ -322,7 +322,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         }
     }
 
-    private function getTagVersions(array $tagsByKey, array &$invalidatedTags = array())
+    private function getTagVersions(array $tagsByKey, array &$invalidatedTags = [])
     {
         $tagVersions = $invalidatedTags;
 
@@ -331,7 +331,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         }
 
         if (!$tagVersions) {
-            return array();
+            return [];
         }
 
         if (!$fetchTagVersions = 1 !== \func_num_args()) {
@@ -345,7 +345,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         }
 
         $now = microtime(true);
-        $tags = array();
+        $tags = [];
         foreach ($tagVersions as $tag => $version) {
             $tags[$tag.static::TAGS_PREFIX] = $tag;
             if ($fetchTagVersions || !isset($this->knownTagVersions[$tag])) {
@@ -370,7 +370,7 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
             if (isset($invalidatedTags[$tag])) {
                 $invalidatedTags[$tag] = $version->set(++$tagVersions[$tag]);
             }
-            $this->knownTagVersions[$tag] = array($now, $tagVersions[$tag]);
+            $this->knownTagVersions[$tag] = [$now, $tagVersions[$tag]];
         }
 
         return $tagVersions;
diff --git a/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php b/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php
index e1d96bb4ef..5c294d03fd 100644
--- a/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/TraceableAdapter.php
@@ -28,7 +28,7 @@ use Symfony\Contracts\Service\ResetInterface;
 class TraceableAdapter implements AdapterInterface, CacheInterface, PruneableInterface, ResettableInterface
 {
     protected $pool;
-    private $calls = array();
+    private $calls = [];
 
     public function __construct(AdapterInterface $pool)
     {
@@ -142,7 +142,7 @@ class TraceableAdapter implements AdapterInterface, CacheInterface, PruneableInt
     /**
      * {@inheritdoc}
      */
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         $event = $this->start(__FUNCTION__);
         try {
@@ -151,7 +151,7 @@ class TraceableAdapter implements AdapterInterface, CacheInterface, PruneableInt
             $event->end = microtime(true);
         }
         $f = function () use ($result, $event) {
-            $event->result = array();
+            $event->result = [];
             foreach ($result as $key => $item) {
                 if ($event->result[$key] = $item->isHit()) {
                     ++$event->hits;
@@ -257,7 +257,7 @@ class TraceableAdapter implements AdapterInterface, CacheInterface, PruneableInt
 
     public function clearCalls()
     {
-        $this->calls = array();
+        $this->calls = [];
     }
 
     protected function start($name)
diff --git a/src/Symfony/Component/Cache/CacheItem.php b/src/Symfony/Component/Cache/CacheItem.php
index e0500756a4..92eb9c39df 100644
--- a/src/Symfony/Component/Cache/CacheItem.php
+++ b/src/Symfony/Component/Cache/CacheItem.php
@@ -28,8 +28,8 @@ final class CacheItem implements ItemInterface
     protected $isHit = false;
     protected $expiry;
     protected $defaultLifetime;
-    protected $metadata = array();
-    protected $newMetadata = array();
+    protected $metadata = [];
+    protected $newMetadata = [];
     protected $innerItem;
     protected $poolHash;
     protected $isTaggable = false;
@@ -111,7 +111,7 @@ final class CacheItem implements ItemInterface
             throw new LogicException(sprintf('Cache item "%s" comes from a non tag-aware pool: you cannot tag it.', $this->key));
         }
         if (!\is_iterable($tags)) {
-            $tags = array($tags);
+            $tags = [$tags];
         }
         foreach ($tags as $tag) {
             if (!\is_string($tag)) {
@@ -151,7 +151,7 @@ final class CacheItem implements ItemInterface
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the "getMetadata()" method instead.', __METHOD__), E_USER_DEPRECATED);
 
-        return $this->metadata[self::METADATA_TAGS] ?? array();
+        return $this->metadata[self::METADATA_TAGS] ?? [];
     }
 
     /**
@@ -183,12 +183,12 @@ final class CacheItem implements ItemInterface
      *
      * @internal
      */
-    public static function log(LoggerInterface $logger = null, $message, $context = array())
+    public static function log(LoggerInterface $logger = null, $message, $context = [])
     {
         if ($logger) {
             $logger->warning($message, $context);
         } else {
-            $replace = array();
+            $replace = [];
             foreach ($context as $k => $v) {
                 if (is_scalar($v)) {
                     $replace['{'.$k.'}'] = $v;
diff --git a/src/Symfony/Component/Cache/DataCollector/CacheDataCollector.php b/src/Symfony/Component/Cache/DataCollector/CacheDataCollector.php
index 5f29bfe5f2..0f708f0859 100644
--- a/src/Symfony/Component/Cache/DataCollector/CacheDataCollector.php
+++ b/src/Symfony/Component/Cache/DataCollector/CacheDataCollector.php
@@ -27,7 +27,7 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
     /**
      * @var TraceableAdapter[]
      */
-    private $instances = array();
+    private $instances = [];
 
     /**
      * @param string           $name
@@ -43,8 +43,8 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
      */
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
-        $empty = array('calls' => array(), 'config' => array(), 'options' => array(), 'statistics' => array());
-        $this->data = array('instances' => $empty, 'total' => $empty);
+        $empty = ['calls' => [], 'config' => [], 'options' => [], 'statistics' => []];
+        $this->data = ['instances' => $empty, 'total' => $empty];
         foreach ($this->instances as $name => $instance) {
             $this->data['instances']['calls'][$name] = $instance->getCalls();
         }
@@ -55,7 +55,7 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
 
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
         foreach ($this->instances as $instance) {
             $instance->clearCalls();
         }
@@ -106,9 +106,9 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
 
     private function calculateStatistics(): array
     {
-        $statistics = array();
+        $statistics = [];
         foreach ($this->data['instances']['calls'] as $name => $calls) {
-            $statistics[$name] = array(
+            $statistics[$name] = [
                 'calls' => 0,
                 'time' => 0,
                 'reads' => 0,
@@ -116,7 +116,7 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
                 'deletes' => 0,
                 'hits' => 0,
                 'misses' => 0,
-            );
+            ];
             /** @var TraceableAdapterEvent $call */
             foreach ($calls as $call) {
                 ++$statistics[$name]['calls'];
@@ -166,7 +166,7 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
     private function calculateTotalStatistics(): array
     {
         $statistics = $this->getStatistics();
-        $totals = array(
+        $totals = [
             'calls' => 0,
             'time' => 0,
             'reads' => 0,
@@ -174,7 +174,7 @@ class CacheDataCollector extends DataCollector implements LateDataCollectorInter
             'deletes' => 0,
             'hits' => 0,
             'misses' => 0,
-        );
+        ];
         foreach ($statistics as $name => $values) {
             foreach ($totals as $key => $value) {
                 $totals[$key] += $statistics[$name][$key];
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CacheCollectorPass.php b/src/Symfony/Component/Cache/DependencyInjection/CacheCollectorPass.php
index f93f97b88e..6193d34798 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CacheCollectorPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CacheCollectorPass.php
@@ -56,16 +56,16 @@ class CacheCollectorPass implements CompilerPassInterface
             $recorder = new Definition(is_subclass_of($definition->getClass(), TagAwareAdapterInterface::class) ? TraceableTagAwareAdapter::class : TraceableAdapter::class);
             $recorder->setTags($definition->getTags());
             $recorder->setPublic($definition->isPublic());
-            $recorder->setArguments(array(new Reference($innerId = $id.$this->cachePoolRecorderInnerSuffix)));
+            $recorder->setArguments([new Reference($innerId = $id.$this->cachePoolRecorderInnerSuffix)]);
 
-            $definition->setTags(array());
+            $definition->setTags([]);
             $definition->setPublic(false);
 
             $container->setDefinition($innerId, $definition);
             $container->setDefinition($id, $recorder);
 
             // Tell the collector to add the new instance
-            $collectorDefinition->addMethodCall('addInstance', array($id, new Reference($id)));
+            $collectorDefinition->addMethodCall('addInstance', [$id, new Reference($id)]);
             $collectorDefinition->setPublic(false);
         }
     }
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CachePoolClearerPass.php b/src/Symfony/Component/Cache/DependencyInjection/CachePoolClearerPass.php
index be315b636d..3ca89a36a5 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CachePoolClearerPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CachePoolClearerPass.php
@@ -36,7 +36,7 @@ class CachePoolClearerPass implements CompilerPassInterface
 
         foreach ($container->findTaggedServiceIds($this->cachePoolClearerTag) as $id => $attr) {
             $clearer = $container->getDefinition($id);
-            $pools = array();
+            $pools = [];
             foreach ($clearer->getArgument(0) as $name => $ref) {
                 if ($container->hasDefinition($ref)) {
                     $pools[$name] = new Reference($ref);
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
index 92e2017e6f..b1af39755e 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPass.php
@@ -54,15 +54,15 @@ class CachePoolPass implements CompilerPassInterface
         }
         $seed .= '.'.$container->getParameter('kernel.container_class');
 
-        $pools = array();
-        $clearers = array();
-        $attributes = array(
+        $pools = [];
+        $clearers = [];
+        $attributes = [
             'provider',
             'name',
             'namespace',
             'default_lifetime',
             'reset',
-        );
+        ];
         foreach ($container->findTaggedServiceIds($this->cachePoolTag) as $id => $tags) {
             $adapter = $pool = $container->getDefinition($id);
             if ($pool->isAbstract()) {
@@ -97,7 +97,7 @@ class CachePoolPass implements CompilerPassInterface
                     // no-op
                 } elseif ('reset' === $attr) {
                     if ($tags[0][$attr]) {
-                        $pool->addTag($this->kernelResetTag, array('method' => $tags[0][$attr]));
+                        $pool->addTag($this->kernelResetTag, ['method' => $tags[0][$attr]]);
                     }
                 } elseif ('namespace' !== $attr || ArrayAdapter::class !== $adapter->getClass()) {
                     $pool->replaceArgument($i++, $tags[0][$attr]);
@@ -156,8 +156,8 @@ class CachePoolPass implements CompilerPassInterface
             if (!$container->hasDefinition($name = '.cache_connection.'.ContainerBuilder::hash($dsn))) {
                 $definition = new Definition(AbstractAdapter::class);
                 $definition->setPublic(false);
-                $definition->setFactory(array(AbstractAdapter::class, 'createConnection'));
-                $definition->setArguments(array($dsn, array('lazy' => true)));
+                $definition->setFactory([AbstractAdapter::class, 'createConnection']);
+                $definition->setArguments([$dsn, ['lazy' => true]]);
                 $container->setDefinition($name, $definition);
             }
         }
diff --git a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPrunerPass.php b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPrunerPass.php
index 21266a871e..e5699623e5 100644
--- a/src/Symfony/Component/Cache/DependencyInjection/CachePoolPrunerPass.php
+++ b/src/Symfony/Component/Cache/DependencyInjection/CachePoolPrunerPass.php
@@ -41,7 +41,7 @@ class CachePoolPrunerPass implements CompilerPassInterface
             return;
         }
 
-        $services = array();
+        $services = [];
 
         foreach ($container->findTaggedServiceIds($this->cachePoolTag) as $id => $tags) {
             $class = $container->getParameterBag()->resolveValue($container->getDefinition($id)->getClass());
diff --git a/src/Symfony/Component/Cache/LockRegistry.php b/src/Symfony/Component/Cache/LockRegistry.php
index 0aadf33d61..e0318e900c 100644
--- a/src/Symfony/Component/Cache/LockRegistry.php
+++ b/src/Symfony/Component/Cache/LockRegistry.php
@@ -25,13 +25,13 @@ use Symfony\Contracts\Cache\ItemInterface;
  */
 class LockRegistry
 {
-    private static $openedFiles = array();
-    private static $lockedFiles = array();
+    private static $openedFiles = [];
+    private static $lockedFiles = [];
 
     /**
      * The number of items in this list controls the max number of concurrent processes.
      */
-    private static $files = array(
+    private static $files = [
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'AbstractAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'AdapterInterface.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'ApcuAdapter.php',
@@ -51,7 +51,7 @@ class LockRegistry
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'TagAwareAdapterInterface.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'TraceableAdapter.php',
         __DIR__.\DIRECTORY_SEPARATOR.'Adapter'.\DIRECTORY_SEPARATOR.'TraceableTagAwareAdapter.php',
-    );
+    ];
 
     /**
      * Defines a set of existing files that will be used as keys to acquire locks.
@@ -69,7 +69,7 @@ class LockRegistry
                 fclose($file);
             }
         }
-        self::$openedFiles = self::$lockedFiles = array();
+        self::$openedFiles = self::$lockedFiles = [];
 
         return $previousFiles;
     }
diff --git a/src/Symfony/Component/Cache/Marshaller/DefaultMarshaller.php b/src/Symfony/Component/Cache/Marshaller/DefaultMarshaller.php
index 16c02bb08f..9c1ef46015 100644
--- a/src/Symfony/Component/Cache/Marshaller/DefaultMarshaller.php
+++ b/src/Symfony/Component/Cache/Marshaller/DefaultMarshaller.php
@@ -37,7 +37,7 @@ class DefaultMarshaller implements MarshallerInterface
      */
     public function marshall(array $values, ?array &$failed): array
     {
-        $serialized = $failed = array();
+        $serialized = $failed = [];
 
         foreach ($values as $id => $value) {
             try {
diff --git a/src/Symfony/Component/Cache/Simple/AbstractCache.php b/src/Symfony/Component/Cache/Simple/AbstractCache.php
index 08456f588f..7a2a3cb36e 100644
--- a/src/Symfony/Component/Cache/Simple/AbstractCache.php
+++ b/src/Symfony/Component/Cache/Simple/AbstractCache.php
@@ -48,11 +48,11 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
         $id = $this->getId($key);
 
         try {
-            foreach ($this->doFetch(array($id)) as $value) {
+            foreach ($this->doFetch([$id]) as $value) {
                 return $value;
             }
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch key "{key}"', array('key' => $key, 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to fetch key "{key}"', ['key' => $key, 'exception' => $e]);
         }
 
         return $default;
@@ -65,7 +65,7 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
     {
         CacheItem::validateKey($key);
 
-        return $this->setMultiple(array($key => $value), $ttl);
+        return $this->setMultiple([$key => $value], $ttl);
     }
 
     /**
@@ -78,7 +78,7 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
         } elseif (!\is_array($keys)) {
             throw new InvalidArgumentException(sprintf('Cache keys must be array or Traversable, "%s" given', \is_object($keys) ? \get_class($keys) : \gettype($keys)));
         }
-        $ids = array();
+        $ids = [];
 
         foreach ($keys as $key) {
             $ids[] = $this->getId($key);
@@ -86,8 +86,8 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
         try {
             $values = $this->doFetch($ids);
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch requested values', array('keys' => $keys, 'exception' => $e));
-            $values = array();
+            CacheItem::log($this->logger, 'Failed to fetch requested values', ['keys' => $keys, 'exception' => $e]);
+            $values = [];
         }
         $ids = array_combine($ids, $keys);
 
@@ -102,7 +102,7 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
         if (!\is_array($values) && !$values instanceof \Traversable) {
             throw new InvalidArgumentException(sprintf('Cache values must be array or Traversable, "%s" given', \is_object($values) ? \get_class($values) : \gettype($values)));
         }
-        $valuesById = array();
+        $valuesById = [];
 
         foreach ($values as $key => $value) {
             if (\is_int($key)) {
@@ -118,14 +118,14 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
             $e = $this->doSave($valuesById, $ttl);
         } catch (\Exception $e) {
         }
-        if (true === $e || array() === $e) {
+        if (true === $e || [] === $e) {
             return true;
         }
-        $keys = array();
+        $keys = [];
         foreach (\is_array($e) ? $e : array_keys($valuesById) as $id) {
             $keys[] = substr($id, \strlen($this->namespace));
         }
-        CacheItem::log($this->logger, 'Failed to save values', array('keys' => $keys, 'exception' => $e instanceof \Exception ? $e : null));
+        CacheItem::log($this->logger, 'Failed to save values', ['keys' => $keys, 'exception' => $e instanceof \Exception ? $e : null]);
 
         return false;
     }
@@ -171,7 +171,7 @@ abstract class AbstractCache implements CacheInterface, LoggerAwareInterface, Re
                 yield $key => $value;
             }
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to fetch requested values', array('keys' => array_values($keys), 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to fetch requested values', ['keys' => array_values($keys), 'exception' => $e]);
         }
 
         foreach ($keys as $key) {
diff --git a/src/Symfony/Component/Cache/Simple/ArrayCache.php b/src/Symfony/Component/Cache/Simple/ArrayCache.php
index 6785943787..e36dacb829 100644
--- a/src/Symfony/Component/Cache/Simple/ArrayCache.php
+++ b/src/Symfony/Component/Cache/Simple/ArrayCache.php
@@ -104,7 +104,7 @@ class ArrayCache implements CacheInterface, LoggerAwareInterface, ResettableInte
             CacheItem::validateKey($key);
         }
 
-        return $this->setMultiple(array($key => $value), $ttl);
+        return $this->setMultiple([$key => $value], $ttl);
     }
 
     /**
@@ -115,7 +115,7 @@ class ArrayCache implements CacheInterface, LoggerAwareInterface, ResettableInte
         if (!\is_array($values) && !$values instanceof \Traversable) {
             throw new InvalidArgumentException(sprintf('Cache values must be array or Traversable, "%s" given', \is_object($values) ? \get_class($values) : \gettype($values)));
         }
-        $valuesArray = array();
+        $valuesArray = [];
 
         foreach ($values as $key => $value) {
             if (!\is_int($key) && !(\is_string($key) && isset($this->expiries[$key]))) {
diff --git a/src/Symfony/Component/Cache/Simple/ChainCache.php b/src/Symfony/Component/Cache/Simple/ChainCache.php
index 922d0fff31..18e9462ba0 100644
--- a/src/Symfony/Component/Cache/Simple/ChainCache.php
+++ b/src/Symfony/Component/Cache/Simple/ChainCache.php
@@ -28,7 +28,7 @@ use Symfony\Contracts\Service\ResetInterface;
 class ChainCache implements CacheInterface, PruneableInterface, ResettableInterface
 {
     private $miss;
-    private $caches = array();
+    private $caches = [];
     private $defaultLifetime;
     private $cacheCount;
 
@@ -88,7 +88,7 @@ class ChainCache implements CacheInterface, PruneableInterface, ResettableInterf
 
     private function generateItems($values, $cacheIndex, $miss, $default)
     {
-        $missing = array();
+        $missing = [];
         $nextCacheIndex = $cacheIndex + 1;
         $nextCache = isset($this->caches[$nextCacheIndex]) ? $this->caches[$nextCacheIndex] : null;
 
@@ -202,7 +202,7 @@ class ChainCache implements CacheInterface, PruneableInterface, ResettableInterf
         if ($values instanceof \Traversable) {
             $valuesIterator = $values;
             $values = function () use ($valuesIterator, &$values) {
-                $generatedValues = array();
+                $generatedValues = [];
 
                 foreach ($valuesIterator as $key => $value) {
                     yield $key => $value;
diff --git a/src/Symfony/Component/Cache/Simple/PdoCache.php b/src/Symfony/Component/Cache/Simple/PdoCache.php
index 076370c97e..521e9b8f2d 100644
--- a/src/Symfony/Component/Cache/Simple/PdoCache.php
+++ b/src/Symfony/Component/Cache/Simple/PdoCache.php
@@ -37,7 +37,7 @@ class PdoCache extends AbstractCache implements PruneableInterface
      *  * db_time_col: The column where to store the timestamp [default: item_time]
      *  * db_username: The username when lazy-connect [default: '']
      *  * db_password: The password when lazy-connect [default: '']
-     *  * db_connection_options: An array of driver-specific connection options [default: array()]
+     *  * db_connection_options: An array of driver-specific connection options [default: []]
      *
      * @param \PDO|Connection|string $connOrDsn a \PDO or Connection instance or DSN string or null
      *
@@ -45,7 +45,7 @@ class PdoCache extends AbstractCache implements PruneableInterface
      * @throws InvalidArgumentException When PDO error mode is not PDO::ERRMODE_EXCEPTION
      * @throws InvalidArgumentException When namespace contains invalid characters
      */
-    public function __construct($connOrDsn, string $namespace = '', int $defaultLifetime = 0, array $options = array(), MarshallerInterface $marshaller = null)
+    public function __construct($connOrDsn, string $namespace = '', int $defaultLifetime = 0, array $options = [], MarshallerInterface $marshaller = null)
     {
         $this->init($connOrDsn, $namespace, $defaultLifetime, $options, $marshaller);
     }
diff --git a/src/Symfony/Component/Cache/Simple/PhpArrayCache.php b/src/Symfony/Component/Cache/Simple/PhpArrayCache.php
index b913aee2b7..6ba8527885 100644
--- a/src/Symfony/Component/Cache/Simple/PhpArrayCache.php
+++ b/src/Symfony/Component/Cache/Simple/PhpArrayCache.php
@@ -147,7 +147,7 @@ class PhpArrayCache implements CacheInterface, PruneableInterface, ResettableInt
         }
 
         $deleted = true;
-        $fallbackKeys = array();
+        $fallbackKeys = [];
 
         foreach ($keys as $key) {
             if (!\is_string($key)) {
@@ -196,7 +196,7 @@ class PhpArrayCache implements CacheInterface, PruneableInterface, ResettableInt
         }
 
         $saved = true;
-        $fallbackValues = array();
+        $fallbackValues = [];
 
         foreach ($values as $key => $value) {
             if (!\is_string($key) && !\is_int($key)) {
@@ -219,7 +219,7 @@ class PhpArrayCache implements CacheInterface, PruneableInterface, ResettableInt
 
     private function generateItems(array $keys, $default)
     {
-        $fallbackKeys = array();
+        $fallbackKeys = [];
 
         foreach ($keys as $key) {
             if (isset($this->keys[$key])) {
diff --git a/src/Symfony/Component/Cache/Simple/Psr6Cache.php b/src/Symfony/Component/Cache/Simple/Psr6Cache.php
index 6330a4fadc..29c039f2c1 100644
--- a/src/Symfony/Component/Cache/Simple/Psr6Cache.php
+++ b/src/Symfony/Component/Cache/Simple/Psr6Cache.php
@@ -147,7 +147,7 @@ class Psr6Cache implements CacheInterface, PruneableInterface, ResettableInterfa
         } catch (Psr6CacheException $e) {
             throw new InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
         }
-        $values = array();
+        $values = [];
 
         if (!$this->pool instanceof AdapterInterface) {
             foreach ($items as $key => $item) {
@@ -170,7 +170,7 @@ class Psr6Cache implements CacheInterface, PruneableInterface, ResettableInterfa
             unset($metadata[CacheItem::METADATA_TAGS]);
 
             if ($metadata) {
-                $values[$key] = array("\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - self::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $values[$key]);
+                $values[$key] = ["\x9D".pack('VN', (int) $metadata[CacheItem::METADATA_EXPIRY] - self::METADATA_EXPIRY_OFFSET, $metadata[CacheItem::METADATA_CTIME])."\x5F" => $values[$key]];
             }
         }
 
@@ -186,7 +186,7 @@ class Psr6Cache implements CacheInterface, PruneableInterface, ResettableInterfa
         if (!$valuesIsArray && !$values instanceof \Traversable) {
             throw new InvalidArgumentException(sprintf('Cache values must be array or Traversable, "%s" given', \is_object($values) ? \get_class($values) : \gettype($values)));
         }
-        $items = array();
+        $items = [];
 
         try {
             if (null !== $f = $this->createCacheItem) {
@@ -195,7 +195,7 @@ class Psr6Cache implements CacheInterface, PruneableInterface, ResettableInterfa
                     $items[$key] = $f($key, $value, true);
                 }
             } elseif ($valuesIsArray) {
-                $items = array();
+                $items = [];
                 foreach ($values as $key => $value) {
                     $items[] = (string) $key;
                 }
diff --git a/src/Symfony/Component/Cache/Simple/TraceableCache.php b/src/Symfony/Component/Cache/Simple/TraceableCache.php
index d6ed40f443..2db335ac96 100644
--- a/src/Symfony/Component/Cache/Simple/TraceableCache.php
+++ b/src/Symfony/Component/Cache/Simple/TraceableCache.php
@@ -25,7 +25,7 @@ class TraceableCache implements CacheInterface, PruneableInterface, ResettableIn
 {
     private $pool;
     private $miss;
-    private $calls = array();
+    private $calls = [];
 
     public function __construct(CacheInterface $pool)
     {
@@ -100,7 +100,7 @@ class TraceableCache implements CacheInterface, PruneableInterface, ResettableIn
     public function setMultiple($values, $ttl = null)
     {
         $event = $this->start(__FUNCTION__);
-        $event->result['keys'] = array();
+        $event->result['keys'] = [];
 
         if ($values instanceof \Traversable) {
             $values = function () use ($values, $event) {
@@ -134,7 +134,7 @@ class TraceableCache implements CacheInterface, PruneableInterface, ResettableIn
             $event->end = microtime(true);
         }
         $f = function () use ($result, $event, $miss, $default) {
-            $event->result = array();
+            $event->result = [];
             foreach ($result as $key => $value) {
                 if ($event->result[$key] = $miss !== $value) {
                     ++$event->hits;
@@ -217,7 +217,7 @@ class TraceableCache implements CacheInterface, PruneableInterface, ResettableIn
         try {
             return $this->calls;
         } finally {
-            $this->calls = array();
+            $this->calls = [];
         }
     }
 
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/AbstractRedisAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/AbstractRedisAdapterTest.php
index 147dfcd153..5fcec9a263 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/AbstractRedisAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/AbstractRedisAdapterTest.php
@@ -15,11 +15,11 @@ use Symfony\Component\Cache\Adapter\RedisAdapter;
 
 abstract class AbstractRedisAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testExpiration' => 'Testing expiration slows down the test suite',
         'testHasItemReturnsFalseWhenDeferredItemIsExpired' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     protected static $redis;
 
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php b/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
index e473c7b084..8a7d147808 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/AdapterTestCase.php
@@ -77,10 +77,10 @@ abstract class AdapterTestCase extends CachePoolTest
 
         $item = $cache->getItem('foo');
 
-        $expected = array(
+        $expected = [
             CacheItem::METADATA_EXPIRY => 9.5 + time(),
             CacheItem::METADATA_CTIME => 1000,
-        );
+        ];
         $this->assertEquals($expected, $item->getMetadata(), 'Item metadata should embed expiry and ctime.', .6);
     }
 
@@ -139,11 +139,11 @@ abstract class AdapterTestCase extends CachePoolTest
         $item = $cache->getItem('foo');
         $this->assertFalse($item->isHit());
 
-        foreach ($cache->getItems(array('foo')) as $item) {
+        foreach ($cache->getItems(['foo']) as $item) {
         }
         $cache->save($item->set(new NotUnserializable()));
 
-        foreach ($cache->getItems(array('foo')) as $item) {
+        foreach ($cache->getItems(['foo']) as $item) {
         }
         $this->assertFalse($item->isHit());
     }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/ApcuAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/ApcuAdapterTest.php
index a17b42bce4..5cca73f561 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/ApcuAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/ApcuAdapterTest.php
@@ -16,11 +16,11 @@ use Symfony\Component\Cache\Adapter\ApcuAdapter;
 
 class ApcuAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testExpiration' => 'Testing expiration slows down the test suite',
         'testHasItemReturnsFalseWhenDeferredItemIsExpired' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/ArrayAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/ArrayAdapterTest.php
index 7b65061cd1..5c72dc6e0b 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/ArrayAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/ArrayAdapterTest.php
@@ -18,11 +18,11 @@ use Symfony\Component\Cache\Adapter\ArrayAdapter;
  */
 class ArrayAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testGetMetadata' => 'ArrayAdapter does not keep metadata.',
         'testDeferredSaveWithoutCommit' => 'Assumes a shared cache which ArrayAdapter is not.',
         'testSaveWithoutExpire' => 'Assumes a shared cache which ArrayAdapter is not.',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/ChainAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/ChainAdapterTest.php
index 09ba6e444c..61b039b57b 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/ChainAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/ChainAdapterTest.php
@@ -27,10 +27,10 @@ class ChainAdapterTest extends AdapterTestCase
     public function createCachePool($defaultLifetime = 0, $testMethod = null)
     {
         if ('testGetMetadata' === $testMethod) {
-            return new ChainAdapter(array(new FilesystemAdapter('', $defaultLifetime)), $defaultLifetime);
+            return new ChainAdapter([new FilesystemAdapter('', $defaultLifetime)], $defaultLifetime);
         }
 
-        return new ChainAdapter(array(new ArrayAdapter($defaultLifetime), new ExternalAdapter(), new FilesystemAdapter('', $defaultLifetime)), $defaultLifetime);
+        return new ChainAdapter([new ArrayAdapter($defaultLifetime), new ExternalAdapter(), new FilesystemAdapter('', $defaultLifetime)], $defaultLifetime);
     }
 
     /**
@@ -39,7 +39,7 @@ class ChainAdapterTest extends AdapterTestCase
      */
     public function testEmptyAdaptersException()
     {
-        new ChainAdapter(array());
+        new ChainAdapter([]);
     }
 
     /**
@@ -48,7 +48,7 @@ class ChainAdapterTest extends AdapterTestCase
      */
     public function testInvalidAdapterException()
     {
-        new ChainAdapter(array(new \stdClass()));
+        new ChainAdapter([new \stdClass()]);
     }
 
     public function testPrune()
@@ -57,18 +57,18 @@ class ChainAdapterTest extends AdapterTestCase
             $this->markTestSkipped($this->skippedTests[__FUNCTION__]);
         }
 
-        $cache = new ChainAdapter(array(
+        $cache = new ChainAdapter([
             $this->getPruneableMock(),
             $this->getNonPruneableMock(),
             $this->getPruneableMock(),
-        ));
+        ]);
         $this->assertTrue($cache->prune());
 
-        $cache = new ChainAdapter(array(
+        $cache = new ChainAdapter([
             $this->getPruneableMock(),
             $this->getFailingPruneableMock(),
             $this->getPruneableMock(),
-        ));
+        ]);
         $this->assertFalse($cache->prune());
     }
 
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/DoctrineAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/DoctrineAdapterTest.php
index 8d4dfe2858..8f520cb59a 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/DoctrineAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/DoctrineAdapterTest.php
@@ -19,11 +19,11 @@ use Symfony\Component\Cache\Tests\Fixtures\ArrayCache;
  */
 class DoctrineAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testDeferredSaveWithoutCommit' => 'Assumes a shared cache which ArrayCache is not.',
         'testSaveWithoutExpire' => 'Assumes a shared cache which ArrayCache is not.',
         'testNotUnserializable' => 'ArrayCache does not use serialize/unserialize',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/MaxIdLengthAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/MaxIdLengthAdapterTest.php
index 7613afa7f9..fec985e6da 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/MaxIdLengthAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/MaxIdLengthAdapterTest.php
@@ -19,15 +19,15 @@ class MaxIdLengthAdapterTest extends TestCase
     public function testLongKey()
     {
         $cache = $this->getMockBuilder(MaxIdLengthAdapter::class)
-            ->setConstructorArgs(array(str_repeat('-', 10)))
-            ->setMethods(array('doHave', 'doFetch', 'doDelete', 'doSave', 'doClear'))
+            ->setConstructorArgs([str_repeat('-', 10)])
+            ->setMethods(['doHave', 'doFetch', 'doDelete', 'doSave', 'doClear'])
             ->getMock();
 
         $cache->expects($this->exactly(2))
             ->method('doHave')
             ->withConsecutive(
-                array($this->equalTo('----------:nWfzGiCgLczv3SSUzXL3kg:')),
-                array($this->equalTo('----------:---------------------------------------'))
+                [$this->equalTo('----------:nWfzGiCgLczv3SSUzXL3kg:')],
+                [$this->equalTo('----------:---------------------------------------')]
             );
 
         $cache->hasItem(str_repeat('-', 40));
@@ -37,7 +37,7 @@ class MaxIdLengthAdapterTest extends TestCase
     public function testLongKeyVersioning()
     {
         $cache = $this->getMockBuilder(MaxIdLengthAdapter::class)
-            ->setConstructorArgs(array(str_repeat('-', 26)))
+            ->setConstructorArgs([str_repeat('-', 26)])
             ->getMock();
 
         $reflectionClass = new \ReflectionClass(AbstractAdapter::class);
@@ -46,20 +46,20 @@ class MaxIdLengthAdapterTest extends TestCase
         $reflectionMethod->setAccessible(true);
 
         // No versioning enabled
-        $this->assertEquals('--------------------------:------------', $reflectionMethod->invokeArgs($cache, array(str_repeat('-', 12))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 12)))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 23)))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 40)))));
+        $this->assertEquals('--------------------------:------------', $reflectionMethod->invokeArgs($cache, [str_repeat('-', 12)]));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 12)])));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 23)])));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 40)])));
 
         $reflectionProperty = $reflectionClass->getProperty('versioningIsEnabled');
         $reflectionProperty->setAccessible(true);
         $reflectionProperty->setValue($cache, true);
 
         // Versioning enabled
-        $this->assertEquals('--------------------------:1/------------', $reflectionMethod->invokeArgs($cache, array(str_repeat('-', 12))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 12)))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 23)))));
-        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, array(str_repeat('-', 40)))));
+        $this->assertEquals('--------------------------:1/------------', $reflectionMethod->invokeArgs($cache, [str_repeat('-', 12)]));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 12)])));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 23)])));
+        $this->assertLessThanOrEqual(50, \strlen($reflectionMethod->invokeArgs($cache, [str_repeat('-', 40)])));
     }
 
     /**
@@ -69,7 +69,7 @@ class MaxIdLengthAdapterTest extends TestCase
     public function testTooLongNamespace()
     {
         $cache = $this->getMockBuilder(MaxIdLengthAdapter::class)
-            ->setConstructorArgs(array(str_repeat('-', 40)))
+            ->setConstructorArgs([str_repeat('-', 40)])
             ->getMock();
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
index 4ebe4c8798..59f33f3aee 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/MemcachedAdapterTest.php
@@ -16,10 +16,10 @@ use Symfony\Component\Cache\Adapter\MemcachedAdapter;
 
 class MemcachedAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testHasItemReturnsFalseWhenDeferredItemIsExpired' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     protected static $client;
 
@@ -28,7 +28,7 @@ class MemcachedAdapterTest extends AdapterTestCase
         if (!MemcachedAdapter::isSupported()) {
             self::markTestSkipped('Extension memcached >=2.2.0 required.');
         }
-        self::$client = AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), array('binary_protocol' => false));
+        self::$client = AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), ['binary_protocol' => false]);
         self::$client->get('foo');
         $code = self::$client->getResultCode();
 
@@ -46,13 +46,13 @@ class MemcachedAdapterTest extends AdapterTestCase
 
     public function testOptions()
     {
-        $client = MemcachedAdapter::createConnection(array(), array(
+        $client = MemcachedAdapter::createConnection([], [
             'libketama_compatible' => false,
             'distribution' => 'modula',
             'compression' => true,
             'serializer' => 'php',
             'hash' => 'md5',
-        ));
+        ]);
 
         $this->assertSame(\Memcached::SERIALIZER_PHP, $client->getOption(\Memcached::OPT_SERIALIZER));
         $this->assertSame(\Memcached::HASH_MD5, $client->getOption(\Memcached::OPT_HASH));
@@ -68,24 +68,24 @@ class MemcachedAdapterTest extends AdapterTestCase
      */
     public function testBadOptions($name, $value)
     {
-        MemcachedAdapter::createConnection(array(), array($name => $value));
+        MemcachedAdapter::createConnection([], [$name => $value]);
     }
 
     public function provideBadOptions()
     {
-        return array(
-            array('foo', 'bar'),
-            array('hash', 'zyx'),
-            array('serializer', 'zyx'),
-            array('distribution', 'zyx'),
-        );
+        return [
+            ['foo', 'bar'],
+            ['hash', 'zyx'],
+            ['serializer', 'zyx'],
+            ['distribution', 'zyx'],
+        ];
     }
 
     public function testDefaultOptions()
     {
         $this->assertTrue(MemcachedAdapter::isSupported());
 
-        $client = MemcachedAdapter::createConnection(array());
+        $client = MemcachedAdapter::createConnection([]);
 
         $this->assertTrue($client->getOption(\Memcached::OPT_COMPRESSION));
         $this->assertSame(1, $client->getOption(\Memcached::OPT_BINARY_PROTOCOL));
@@ -103,7 +103,7 @@ class MemcachedAdapterTest extends AdapterTestCase
             $this->markTestSkipped('Memcached::HAVE_JSON required');
         }
 
-        new MemcachedAdapter(MemcachedAdapter::createConnection(array(), array('serializer' => 'json')));
+        new MemcachedAdapter(MemcachedAdapter::createConnection([], ['serializer' => 'json']));
     }
 
     /**
@@ -112,54 +112,54 @@ class MemcachedAdapterTest extends AdapterTestCase
     public function testServersSetting($dsn, $host, $port)
     {
         $client1 = MemcachedAdapter::createConnection($dsn);
-        $client2 = MemcachedAdapter::createConnection(array($dsn));
-        $client3 = MemcachedAdapter::createConnection(array(array($host, $port)));
-        $expect = array(
+        $client2 = MemcachedAdapter::createConnection([$dsn]);
+        $client3 = MemcachedAdapter::createConnection([[$host, $port]]);
+        $expect = [
             'host' => $host,
             'port' => $port,
-        );
+        ];
 
-        $f = function ($s) { return array('host' => $s['host'], 'port' => $s['port']); };
-        $this->assertSame(array($expect), array_map($f, $client1->getServerList()));
-        $this->assertSame(array($expect), array_map($f, $client2->getServerList()));
-        $this->assertSame(array($expect), array_map($f, $client3->getServerList()));
+        $f = function ($s) { return ['host' => $s['host'], 'port' => $s['port']]; };
+        $this->assertSame([$expect], array_map($f, $client1->getServerList()));
+        $this->assertSame([$expect], array_map($f, $client2->getServerList()));
+        $this->assertSame([$expect], array_map($f, $client3->getServerList()));
     }
 
     public function provideServersSetting()
     {
-        yield array(
+        yield [
             'memcached://127.0.0.1/50',
             '127.0.0.1',
             11211,
-        );
-        yield array(
+        ];
+        yield [
             'memcached://localhost:11222?weight=25',
             'localhost',
             11222,
-        );
+        ];
         if (filter_var(ini_get('memcached.use_sasl'), FILTER_VALIDATE_BOOLEAN)) {
-            yield array(
+            yield [
                 'memcached://user:password@127.0.0.1?weight=50',
                 '127.0.0.1',
                 11211,
-            );
+            ];
         }
-        yield array(
+        yield [
             'memcached:///var/run/memcached.sock?weight=25',
             '/var/run/memcached.sock',
             0,
-        );
-        yield array(
+        ];
+        yield [
             'memcached:///var/local/run/memcached.socket?weight=25',
             '/var/local/run/memcached.socket',
             0,
-        );
+        ];
         if (filter_var(ini_get('memcached.use_sasl'), FILTER_VALIDATE_BOOLEAN)) {
-            yield array(
+            yield [
                 'memcached://user:password@/var/local/run/memcached.socket?weight=25',
                 '/var/local/run/memcached.socket',
                 0,
-            );
+            ];
         }
     }
 
@@ -181,16 +181,16 @@ class MemcachedAdapterTest extends AdapterTestCase
             self::markTestSkipped('Extension memcached required.');
         }
 
-        yield array(
+        yield [
             'memcached://localhost:11222?retry_timeout=10',
-            array(\Memcached::OPT_RETRY_TIMEOUT => 8),
-            array(\Memcached::OPT_RETRY_TIMEOUT => 10),
-        );
-        yield array(
+            [\Memcached::OPT_RETRY_TIMEOUT => 8],
+            [\Memcached::OPT_RETRY_TIMEOUT => 10],
+        ];
+        yield [
             'memcached://localhost:11222?socket_recv_size=1&socket_send_size=2',
-            array(\Memcached::OPT_RETRY_TIMEOUT => 8),
-            array(\Memcached::OPT_SOCKET_RECV_SIZE => 1, \Memcached::OPT_SOCKET_SEND_SIZE => 2, \Memcached::OPT_RETRY_TIMEOUT => 8),
-        );
+            [\Memcached::OPT_RETRY_TIMEOUT => 8],
+            [\Memcached::OPT_SOCKET_RECV_SIZE => 1, \Memcached::OPT_SOCKET_SEND_SIZE => 2, \Memcached::OPT_RETRY_TIMEOUT => 8],
+        ];
     }
 
     public function testClear()
@@ -203,40 +203,40 @@ class MemcachedAdapterTest extends AdapterTestCase
         $dsn = 'memcached:?host[localhost]&host[localhost:12345]&host[/some/memcached.sock:]=3';
         $client = MemcachedAdapter::createConnection($dsn);
 
-        $expected = array(
-            0 => array(
+        $expected = [
+            0 => [
                 'host' => 'localhost',
                 'port' => 11211,
                 'type' => 'TCP',
-            ),
-            1 => array(
+            ],
+            1 => [
                 'host' => 'localhost',
                 'port' => 12345,
                 'type' => 'TCP',
-            ),
-            2 => array(
+            ],
+            2 => [
                 'host' => '/some/memcached.sock',
                 'port' => 0,
                 'type' => 'SOCKET',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expected, $client->getServerList());
 
         $dsn = 'memcached://localhost?host[foo.bar]=3';
         $client = MemcachedAdapter::createConnection($dsn);
 
-        $expected = array(
-            0 => array(
+        $expected = [
+            0 => [
                 'host' => 'localhost',
                 'port' => 11211,
                 'type' => 'TCP',
-            ),
-            1 => array(
+            ],
+            1 => [
                 'host' => 'foo.bar',
                 'port' => 11211,
                 'type' => 'TCP',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expected, $client->getServerList());
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/NullAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/NullAdapterTest.php
index 73e5cad552..b771fa0ed8 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/NullAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/NullAdapterTest.php
@@ -43,7 +43,7 @@ class NullAdapterTest extends TestCase
     {
         $adapter = $this->createCachePool();
 
-        $keys = array('foo', 'bar', 'baz', 'biz');
+        $keys = ['foo', 'bar', 'baz', 'biz'];
 
         /** @var CacheItemInterface[] $items */
         $items = $adapter->getItems($keys);
@@ -89,7 +89,7 @@ class NullAdapterTest extends TestCase
 
     public function testDeleteItems()
     {
-        $this->assertTrue($this->createCachePool()->deleteItems(array('key', 'foo', 'bar')));
+        $this->assertTrue($this->createCachePool()->deleteItems(['key', 'foo', 'bar']));
     }
 
     public function testSave()
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PdoDbalAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PdoDbalAdapterTest.php
index eea89b7458..1c9fd5140c 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PdoDbalAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PdoDbalAdapterTest.php
@@ -32,7 +32,7 @@ class PdoDbalAdapterTest extends AdapterTestCase
 
         self::$dbFile = tempnam(sys_get_temp_dir(), 'sf_sqlite_cache');
 
-        $pool = new PdoAdapter(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)));
+        $pool = new PdoAdapter(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]));
     }
 
     public static function tearDownAfterClass()
@@ -42,6 +42,6 @@ class PdoDbalAdapterTest extends AdapterTestCase
 
     public function createCachePool($defaultLifetime = 0)
     {
-        return new PdoAdapter(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)), '', $defaultLifetime);
+        return new PdoAdapter(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]), '', $defaultLifetime);
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterTest.php
index 1a6898de58..cee80ac196 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterTest.php
@@ -21,7 +21,7 @@ use Symfony\Component\Cache\Adapter\PhpArrayAdapter;
  */
 class PhpArrayAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testGet' => 'PhpArrayAdapter is read-only.',
         'testBasicUsage' => 'PhpArrayAdapter is read-only.',
         'testBasicUsageWithLongKey' => 'PhpArrayAdapter is read-only.',
@@ -53,7 +53,7 @@ class PhpArrayAdapterTest extends AdapterTestCase
 
         'testDefaultLifeTime' => 'PhpArrayAdapter does not allow configuring a default lifetime.',
         'testPrune' => 'PhpArrayAdapter just proxies',
-    );
+    ];
 
     protected static $file;
 
@@ -80,22 +80,22 @@ class PhpArrayAdapterTest extends AdapterTestCase
 
     public function testStore()
     {
-        $arrayWithRefs = array();
+        $arrayWithRefs = [];
         $arrayWithRefs[0] = 123;
         $arrayWithRefs[1] = &$arrayWithRefs[0];
 
-        $object = (object) array(
+        $object = (object) [
             'foo' => 'bar',
             'foo2' => 'bar2',
-        );
+        ];
 
-        $expected = array(
+        $expected = [
             'null' => null,
             'serializedString' => serialize($object),
             'arrayWithRefs' => $arrayWithRefs,
             'object' => $object,
-            'arrayWithObject' => array('bar' => $object),
-        );
+            'arrayWithObject' => ['bar' => $object],
+        ];
 
         $adapter = $this->createCachePool();
         $adapter->warmUp($expected);
@@ -107,29 +107,29 @@ class PhpArrayAdapterTest extends AdapterTestCase
 
     public function testStoredFile()
     {
-        $data = array(
+        $data = [
             'integer' => 42,
             'float' => 42.42,
             'boolean' => true,
-            'array_simple' => array('foo', 'bar'),
-            'array_associative' => array('foo' => 'bar', 'foo2' => 'bar2'),
-        );
-        $expected = array(
-            array(
+            'array_simple' => ['foo', 'bar'],
+            'array_associative' => ['foo' => 'bar', 'foo2' => 'bar2'],
+        ];
+        $expected = [
+            [
                 'integer' => 0,
                 'float' => 1,
                 'boolean' => 2,
                 'array_simple' => 3,
                 'array_associative' => 4,
-            ),
-            array(
+            ],
+            [
                 0 => 42,
                 1 => 42.42,
                 2 => true,
-                3 => array('foo', 'bar'),
-                4 => array('foo' => 'bar', 'foo2' => 'bar2'),
-            ),
-        );
+                3 => ['foo', 'bar'],
+                4 => ['foo' => 'bar', 'foo2' => 'bar2'],
+            ],
+        ];
 
         $adapter = $this->createCachePool();
         $adapter->warmUp($data);
@@ -142,7 +142,7 @@ class PhpArrayAdapterTest extends AdapterTestCase
 
 class PhpArrayAdapterWrapper extends PhpArrayAdapter
 {
-    protected $data = array();
+    protected $data = [];
 
     public function save(CacheItemInterface $item)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterWithFallbackTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterWithFallbackTest.php
index 1a23198c2f..a7feced4ea 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterWithFallbackTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PhpArrayAdapterWithFallbackTest.php
@@ -19,14 +19,14 @@ use Symfony\Component\Cache\Adapter\PhpArrayAdapter;
  */
 class PhpArrayAdapterWithFallbackTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testGetItemInvalidKeys' => 'PhpArrayAdapter does not throw exceptions on invalid key.',
         'testGetItemsInvalidKeys' => 'PhpArrayAdapter does not throw exceptions on invalid key.',
         'testHasItemInvalidKeys' => 'PhpArrayAdapter does not throw exceptions on invalid key.',
         'testDeleteItemInvalidKeys' => 'PhpArrayAdapter does not throw exceptions on invalid key.',
         'testDeleteItemsInvalidKeys' => 'PhpArrayAdapter does not throw exceptions on invalid key.',
         'testPrune' => 'PhpArrayAdapter just proxies',
-    );
+    ];
 
     protected static $file;
 
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PhpFilesAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PhpFilesAdapterTest.php
index 9fecd9724b..2d5ddf20b7 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PhpFilesAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PhpFilesAdapterTest.php
@@ -19,9 +19,9 @@ use Symfony\Component\Cache\Adapter\PhpFilesAdapter;
  */
 class PhpFilesAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testDefaultLifeTime' => 'PhpFilesAdapter does not allow configuring a default lifetime.',
-    );
+    ];
 
     public function createCachePool()
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
index c65515b54d..abe0a21094 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PredisAdapterTest.php
@@ -19,20 +19,20 @@ class PredisAdapterTest extends AbstractRedisAdapterTest
     public static function setupBeforeClass()
     {
         parent::setupBeforeClass();
-        self::$redis = new \Predis\Client(array('host' => getenv('REDIS_HOST')));
+        self::$redis = new \Predis\Client(['host' => getenv('REDIS_HOST')]);
     }
 
     public function testCreateConnection()
     {
         $redisHost = getenv('REDIS_HOST');
 
-        $redis = RedisAdapter::createConnection('redis://'.$redisHost.'/1', array('class' => \Predis\Client::class, 'timeout' => 3));
+        $redis = RedisAdapter::createConnection('redis://'.$redisHost.'/1', ['class' => \Predis\Client::class, 'timeout' => 3]);
         $this->assertInstanceOf(\Predis\Client::class, $redis);
 
         $connection = $redis->getConnection();
         $this->assertInstanceOf(StreamConnection::class, $connection);
 
-        $params = array(
+        $params = [
             'scheme' => 'tcp',
             'host' => 'localhost',
             'port' => 6379,
@@ -41,7 +41,7 @@ class PredisAdapterTest extends AbstractRedisAdapterTest
             'read_write_timeout' => 0,
             'tcp_nodelay' => true,
             'database' => '1',
-        );
+        ];
         $this->assertSame($params, $connection->getParameters()->toArray());
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PredisClusterAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PredisClusterAdapterTest.php
index 38915397da..f723dc4468 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PredisClusterAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PredisClusterAdapterTest.php
@@ -16,7 +16,7 @@ class PredisClusterAdapterTest extends AbstractRedisAdapterTest
     public static function setupBeforeClass()
     {
         parent::setupBeforeClass();
-        self::$redis = new \Predis\Client(array(array('host' => getenv('REDIS_HOST'))));
+        self::$redis = new \Predis\Client([['host' => getenv('REDIS_HOST')]]);
     }
 
     public static function tearDownAfterClass()
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/PredisRedisClusterAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/PredisRedisClusterAdapterTest.php
index 9974e93635..c819c348d9 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/PredisRedisClusterAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/PredisRedisClusterAdapterTest.php
@@ -21,7 +21,7 @@ class PredisRedisClusterAdapterTest extends AbstractRedisAdapterTest
             self::markTestSkipped('REDIS_CLUSTER_HOSTS env var is not defined.');
         }
 
-        self::$redis = RedisAdapter::createConnection('redis:?host['.str_replace(' ', ']&host[', $hosts).']', array('class' => \Predis\Client::class, 'redis_cluster' => true));
+        self::$redis = RedisAdapter::createConnection('redis:?host['.str_replace(' ', ']&host[', $hosts).']', ['class' => \Predis\Client::class, 'redis_cluster' => true]);
     }
 
     public static function tearDownAfterClass()
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/ProxyAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/ProxyAdapterTest.php
index fbbdac22a8..4e9970cd92 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/ProxyAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/ProxyAdapterTest.php
@@ -22,11 +22,11 @@ use Symfony\Component\Cache\CacheItem;
  */
 class ProxyAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testDeferredSaveWithoutCommit' => 'Assumes a shared cache which ArrayAdapter is not.',
         'testSaveWithoutExpire' => 'Assumes a shared cache which ArrayAdapter is not.',
         'testPrune' => 'ProxyAdapter just proxies',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0, $testMethod = null)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/RedisAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/RedisAdapterTest.php
index 5208df67cb..c83abaf91b 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/RedisAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/RedisAdapterTest.php
@@ -20,7 +20,7 @@ class RedisAdapterTest extends AbstractRedisAdapterTest
     public static function setupBeforeClass()
     {
         parent::setupBeforeClass();
-        self::$redis = AbstractAdapter::createConnection('redis://'.getenv('REDIS_HOST'), array('lazy' => true));
+        self::$redis = AbstractAdapter::createConnection('redis://'.getenv('REDIS_HOST'), ['lazy' => true]);
     }
 
     public function createCachePool($defaultLifetime = 0)
@@ -35,7 +35,7 @@ class RedisAdapterTest extends AbstractRedisAdapterTest
     {
         $redis = RedisAdapter::createConnection('redis:?host[h1]&host[h2]&host[/foo:]');
         $this->assertInstanceOf(\RedisArray::class, $redis);
-        $this->assertSame(array('h1:6379', 'h2:6379', '/foo'), $redis->_hosts());
+        $this->assertSame(['h1:6379', 'h2:6379', '/foo'], $redis->_hosts());
         @$redis = null; // some versions of phpredis connect on destruct, let's silence the warning
 
         $redisHost = getenv('REDIS_HOST');
@@ -48,13 +48,13 @@ class RedisAdapterTest extends AbstractRedisAdapterTest
         $redis = RedisAdapter::createConnection('redis://'.$redisHost.'/2');
         $this->assertSame(2, $redis->getDbNum());
 
-        $redis = RedisAdapter::createConnection('redis://'.$redisHost, array('timeout' => 3));
+        $redis = RedisAdapter::createConnection('redis://'.$redisHost, ['timeout' => 3]);
         $this->assertEquals(3, $redis->getTimeout());
 
         $redis = RedisAdapter::createConnection('redis://'.$redisHost.'?timeout=4');
         $this->assertEquals(4, $redis->getTimeout());
 
-        $redis = RedisAdapter::createConnection('redis://'.$redisHost, array('read_timeout' => 5));
+        $redis = RedisAdapter::createConnection('redis://'.$redisHost, ['read_timeout' => 5]);
         $this->assertEquals(5, $redis->getReadTimeout());
     }
 
@@ -70,11 +70,11 @@ class RedisAdapterTest extends AbstractRedisAdapterTest
 
     public function provideFailedCreateConnection()
     {
-        return array(
-            array('redis://localhost:1234'),
-            array('redis://foo@localhost'),
-            array('redis://localhost/123'),
-        );
+        return [
+            ['redis://localhost:1234'],
+            ['redis://foo@localhost'],
+            ['redis://localhost/123'],
+        ];
     }
 
     /**
@@ -89,9 +89,9 @@ class RedisAdapterTest extends AbstractRedisAdapterTest
 
     public function provideInvalidCreateConnection()
     {
-        return array(
-            array('foo://localhost'),
-            array('redis://'),
-        );
+        return [
+            ['foo://localhost'],
+            ['redis://'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/RedisArrayAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/RedisArrayAdapterTest.php
index bef3eb8872..749b039a03 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/RedisArrayAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/RedisArrayAdapterTest.php
@@ -19,6 +19,6 @@ class RedisArrayAdapterTest extends AbstractRedisAdapterTest
         if (!class_exists('RedisArray')) {
             self::markTestSkipped('The RedisArray class is required.');
         }
-        self::$redis = new \RedisArray(array(getenv('REDIS_HOST')), array('lazy_connect' => true));
+        self::$redis = new \RedisArray([getenv('REDIS_HOST')], ['lazy_connect' => true]);
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/RedisClusterAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/RedisClusterAdapterTest.php
index 344f1d0743..75dd2790cc 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/RedisClusterAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/RedisClusterAdapterTest.php
@@ -26,7 +26,7 @@ class RedisClusterAdapterTest extends AbstractRedisAdapterTest
             self::markTestSkipped('REDIS_CLUSTER_HOSTS env var is not defined.');
         }
 
-        self::$redis = AbstractAdapter::createConnection('redis:?host['.str_replace(' ', ']&host[', $hosts).']', array('lazy' => true, 'redis_cluster' => true));
+        self::$redis = AbstractAdapter::createConnection('redis:?host['.str_replace(' ', ']&host[', $hosts).']', ['lazy' => true, 'redis_cluster' => true]);
     }
 
     public function createCachePool($defaultLifetime = 0)
@@ -49,10 +49,10 @@ class RedisClusterAdapterTest extends AbstractRedisAdapterTest
 
     public function provideFailedCreateConnection()
     {
-        return array(
-            array('redis://localhost:1234?redis_cluster=1'),
-            array('redis://foo@localhost?redis_cluster=1'),
-            array('redis://localhost/123?redis_cluster=1'),
-        );
+        return [
+            ['redis://localhost:1234?redis_cluster=1'],
+            ['redis://foo@localhost?redis_cluster=1'],
+            ['redis://localhost/123?redis_cluster=1'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/SimpleCacheAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/SimpleCacheAdapterTest.php
index 089a4f33fa..3028af47c6 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/SimpleCacheAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/SimpleCacheAdapterTest.php
@@ -20,9 +20,9 @@ use Symfony\Component\Cache\Simple\Psr6Cache;
  */
 class SimpleCacheAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testPrune' => 'SimpleCache just proxies',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
index ad37fbef7d..7b8895b700 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
@@ -57,7 +57,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $pool->save($i3->tag('foo')->tag('baz'));
         $pool->save($foo);
 
-        $pool->invalidateTags(array('bar'));
+        $pool->invalidateTags(['bar']);
 
         $this->assertFalse($pool->getItem('i0')->isHit());
         $this->assertTrue($pool->getItem('i1')->isHit());
@@ -65,7 +65,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $this->assertTrue($pool->getItem('i3')->isHit());
         $this->assertTrue($pool->getItem('foo')->isHit());
 
-        $pool->invalidateTags(array('foo'));
+        $pool->invalidateTags(['foo']);
 
         $this->assertFalse($pool->getItem('i1')->isHit());
         $this->assertFalse($pool->getItem('i3')->isHit());
@@ -86,7 +86,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $foo->tag('tag');
 
         $pool1->saveDeferred($foo->set('foo'));
-        $pool1->invalidateTags(array('tag'));
+        $pool1->invalidateTags(['tag']);
 
         $pool2 = $this->createCachePool();
         $foo = $pool2->getItem('foo');
@@ -104,7 +104,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $i = $pool->getItem('k');
         $pool->save($i->tag('bar'));
 
-        $pool->invalidateTags(array('foo'));
+        $pool->invalidateTags(['foo']);
         $this->assertTrue($pool->getItem('k')->isHit());
     }
 
@@ -117,7 +117,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $pool->deleteItem('k');
 
         $pool->save($pool->getItem('k'));
-        $pool->invalidateTags(array('foo'));
+        $pool->invalidateTags(['foo']);
 
         $this->assertTrue($pool->getItem('k')->isHit());
     }
@@ -127,11 +127,11 @@ class TagAwareAdapterTest extends AdapterTestCase
         $pool = $this->createCachePool(10);
 
         $item = $pool->getItem('foo');
-        $item->tag(array('baz'));
+        $item->tag(['baz']);
         $item->expiresAfter(100);
 
         $pool->save($item);
-        $pool->invalidateTags(array('baz'));
+        $pool->invalidateTags(['baz']);
         $this->assertFalse($pool->getItem('foo')->isHit());
 
         sleep(20);
@@ -150,7 +150,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $pool->save($i->tag('foo'));
 
         $i = $pool->getItem('k');
-        $this->assertSame(array('foo' => 'foo'), $i->getPreviousTags());
+        $this->assertSame(['foo' => 'foo'], $i->getPreviousTags());
     }
 
     public function testGetMetadata()
@@ -161,7 +161,7 @@ class TagAwareAdapterTest extends AdapterTestCase
         $pool->save($i->tag('foo'));
 
         $i = $pool->getItem('k');
-        $this->assertSame(array('foo' => 'foo'), $i->getMetadata()[CacheItem::METADATA_TAGS]);
+        $this->assertSame(['foo' => 'foo'], $i->getMetadata()[CacheItem::METADATA_TAGS]);
     }
 
     public function testPrune()
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/TraceableAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/TraceableAdapterTest.php
index 3755e88db5..35eba7d77b 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/TraceableAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/TraceableAdapterTest.php
@@ -19,9 +19,9 @@ use Symfony\Component\Cache\Adapter\TraceableAdapter;
  */
 class TraceableAdapterTest extends AdapterTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testPrune' => 'TraceableAdapter just proxies',
-    );
+    ];
 
     public function createCachePool($defaultLifetime = 0)
     {
@@ -37,7 +37,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[0];
         $this->assertSame('getItem', $call->name);
-        $this->assertSame(array('k' => false), $call->result);
+        $this->assertSame(['k' => false], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(1, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -61,7 +61,7 @@ class TraceableAdapterTest extends AdapterTestCase
     public function testGetItemsMissTrace()
     {
         $pool = $this->createCachePool();
-        $arg = array('k0', 'k1');
+        $arg = ['k0', 'k1'];
         $items = $pool->getItems($arg);
         foreach ($items as $item) {
         }
@@ -70,7 +70,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[0];
         $this->assertSame('getItems', $call->name);
-        $this->assertSame(array('k0' => false, 'k1' => false), $call->result);
+        $this->assertSame(['k0' => false, 'k1' => false], $call->result);
         $this->assertSame(2, $call->misses);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
@@ -85,7 +85,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[0];
         $this->assertSame('hasItem', $call->name);
-        $this->assertSame(array('k' => false), $call->result);
+        $this->assertSame(['k' => false], $call->result);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
     }
@@ -101,7 +101,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[2];
         $this->assertSame('hasItem', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
     }
@@ -115,7 +115,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[0];
         $this->assertSame('deleteItem', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -125,14 +125,14 @@ class TraceableAdapterTest extends AdapterTestCase
     public function testDeleteItemsTrace()
     {
         $pool = $this->createCachePool();
-        $arg = array('k0', 'k1');
+        $arg = ['k0', 'k1'];
         $pool->deleteItems($arg);
         $calls = $pool->getCalls();
         $this->assertCount(1, $calls);
 
         $call = $calls[0];
         $this->assertSame('deleteItems', $call->name);
-        $this->assertSame(array('keys' => $arg, 'result' => true), $call->result);
+        $this->assertSame(['keys' => $arg, 'result' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -149,7 +149,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[1];
         $this->assertSame('save', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -166,7 +166,7 @@ class TraceableAdapterTest extends AdapterTestCase
 
         $call = $calls[1];
         $this->assertSame('saveDeferred', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/TraceableTagAwareAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/TraceableTagAwareAdapterTest.php
index 9b50bfabe6..5cd4185cb0 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/TraceableTagAwareAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/TraceableTagAwareAdapterTest.php
@@ -23,7 +23,7 @@ class TraceableTagAwareAdapterTest extends TraceableAdapterTest
     public function testInvalidateTags()
     {
         $pool = new TraceableTagAwareAdapter(new TagAwareAdapter(new FilesystemAdapter()));
-        $pool->invalidateTags(array('foo'));
+        $pool->invalidateTags(['foo']);
         $calls = $pool->getCalls();
         $this->assertCount(1, $calls);
 
diff --git a/src/Symfony/Component/Cache/Tests/CacheItemTest.php b/src/Symfony/Component/Cache/Tests/CacheItemTest.php
index 395c003bd3..0e3f4b9a73 100644
--- a/src/Symfony/Component/Cache/Tests/CacheItemTest.php
+++ b/src/Symfony/Component/Cache/Tests/CacheItemTest.php
@@ -33,23 +33,23 @@ class CacheItemTest extends TestCase
 
     public function provideInvalidKey()
     {
-        return array(
-            array(''),
-            array('{'),
-            array('}'),
-            array('('),
-            array(')'),
-            array('/'),
-            array('\\'),
-            array('@'),
-            array(':'),
-            array(true),
-            array(null),
-            array(1),
-            array(1.1),
-            array(array(array())),
-            array(new \Exception('foo')),
-        );
+        return [
+            [''],
+            ['{'],
+            ['}'],
+            ['('],
+            [')'],
+            ['/'],
+            ['\\'],
+            ['@'],
+            [':'],
+            [true],
+            [null],
+            [1],
+            [1.1],
+            [[[]]],
+            [new \Exception('foo')],
+        ];
     }
 
     public function testTag()
@@ -60,10 +60,10 @@ class CacheItemTest extends TestCase
         $r->setValue($item, true);
 
         $this->assertSame($item, $item->tag('foo'));
-        $this->assertSame($item, $item->tag(array('bar', 'baz')));
+        $this->assertSame($item, $item->tag(['bar', 'baz']));
 
         (\Closure::bind(function () use ($item) {
-            $this->assertSame(array('foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz'), $item->newMetadata[CacheItem::METADATA_TAGS]);
+            $this->assertSame(['foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz'], $item->newMetadata[CacheItem::METADATA_TAGS]);
         }, $this, CacheItem::class))();
     }
 
@@ -93,6 +93,6 @@ class CacheItemTest extends TestCase
         $r->setAccessible(true);
         $r->setValue($item, 'foo');
 
-        $item->tag(array());
+        $item->tag([]);
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/DependencyInjection/CacheCollectorPassTest.php b/src/Symfony/Component/Cache/Tests/DependencyInjection/CacheCollectorPassTest.php
index 421f5764de..7e77491de8 100644
--- a/src/Symfony/Component/Cache/Tests/DependencyInjection/CacheCollectorPassTest.php
+++ b/src/Symfony/Component/Cache/Tests/DependencyInjection/CacheCollectorPassTest.php
@@ -37,10 +37,10 @@ class CacheCollectorPassTest extends TestCase
         $collector = $container->register('data_collector.cache', CacheDataCollector::class);
         (new CacheCollectorPass())->process($container);
 
-        $this->assertEquals(array(
-            array('addInstance', array('fs', new Reference('fs'))),
-            array('addInstance', array('tagged_fs', new Reference('tagged_fs'))),
-        ), $collector->getMethodCalls());
+        $this->assertEquals([
+            ['addInstance', ['fs', new Reference('fs')]],
+            ['addInstance', ['tagged_fs', new Reference('tagged_fs')]],
+        ], $collector->getMethodCalls());
 
         $this->assertSame(TraceableAdapter::class, $container->findDefinition('fs')->getClass());
         $this->assertSame(TraceableTagAwareAdapter::class, $container->getDefinition('tagged_fs')->getClass());
diff --git a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolClearerPassTest.php b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolClearerPassTest.php
index 6aa68c29cd..533aa14aff 100644
--- a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolClearerPassTest.php
+++ b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolClearerPassTest.php
@@ -34,18 +34,18 @@ class CachePoolClearerPassTest extends TestCase
 
         $publicPool = new Definition();
         $publicPool->addArgument('namespace');
-        $publicPool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $publicPool->addTag('cache.pool', ['clearer' => 'clearer_alias']);
         $container->setDefinition('public.pool', $publicPool);
 
         $publicPool = new Definition();
         $publicPool->addArgument('namespace');
-        $publicPool->addTag('cache.pool', array('clearer' => 'clearer_alias', 'name' => 'pool2'));
+        $publicPool->addTag('cache.pool', ['clearer' => 'clearer_alias', 'name' => 'pool2']);
         $container->setDefinition('public.pool2', $publicPool);
 
         $privatePool = new Definition();
         $privatePool->setPublic(false);
         $privatePool->addArgument('namespace');
-        $privatePool->addTag('cache.pool', array('clearer' => 'clearer_alias'));
+        $privatePool->addTag('cache.pool', ['clearer' => 'clearer_alias']);
         $container->setDefinition('private.pool', $privatePool);
 
         $clearer = new Definition();
@@ -55,18 +55,18 @@ class CachePoolClearerPassTest extends TestCase
         $pass = new RemoveUnusedDefinitionsPass();
         foreach ($container->getCompiler()->getPassConfig()->getRemovingPasses() as $removingPass) {
             if ($removingPass instanceof RepeatedPass) {
-                $pass->setRepeatedPass(new RepeatedPass(array($pass)));
+                $pass->setRepeatedPass(new RepeatedPass([$pass]));
                 break;
             }
         }
-        foreach (array(new CachePoolPass(), $pass, new CachePoolClearerPass()) as $pass) {
+        foreach ([new CachePoolPass(), $pass, new CachePoolClearerPass()] as $pass) {
             $pass->process($container);
         }
 
-        $expected = array(array(
+        $expected = [[
             'public.pool' => new Reference('public.pool'),
             'pool2' => new Reference('public.pool2'),
-        ));
+        ]];
         $this->assertEquals($expected, $clearer->getArguments());
         $this->assertEquals($expected, $globalClearer->getArguments());
     }
diff --git a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
index f757e79821..f307aa5386 100644
--- a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
+++ b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPassTest.php
@@ -71,10 +71,10 @@ class CachePoolPassTest extends TestCase
         $container->setParameter('kernel.container_class', 'app');
         $container->setParameter('cache.prefix.seed', 'foo');
         $cachePool = new Definition();
-        $cachePool->addTag('cache.pool', array(
+        $cachePool->addTag('cache.pool', [
             'provider' => 'foobar',
             'default_lifetime' => 3,
-        ));
+        ]);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
@@ -94,10 +94,10 @@ class CachePoolPassTest extends TestCase
         $container->setParameter('kernel.container_class', 'app');
         $container->setParameter('cache.prefix.seed', 'foo');
         $cachePool = new Definition();
-        $cachePool->addTag('cache.pool', array(
+        $cachePool->addTag('cache.pool', [
             'name' => 'foobar',
             'provider' => 'foobar',
-        ));
+        ]);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
         $cachePool->addArgument(null);
@@ -122,7 +122,7 @@ class CachePoolPassTest extends TestCase
         $adapter->addTag('cache.pool');
         $container->setDefinition('app.cache_adapter', $adapter);
         $cachePool = new ChildDefinition('app.cache_adapter');
-        $cachePool->addTag('cache.pool', array('foobar' => 123));
+        $cachePool->addTag('cache.pool', ['foobar' => 123]);
         $container->setDefinition('app.cache_pool', $cachePool);
 
         $this->cachePoolPass->process($container);
diff --git a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPrunerPassTest.php b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPrunerPassTest.php
index e4de6f6807..128ee243c6 100644
--- a/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPrunerPassTest.php
+++ b/src/Symfony/Component/Cache/Tests/DependencyInjection/CachePoolPrunerPassTest.php
@@ -24,17 +24,17 @@ class CachePoolPrunerPassTest extends TestCase
     public function testCompilerPassReplacesCommandArgument()
     {
         $container = new ContainerBuilder();
-        $container->register('console.command.cache_pool_prune')->addArgument(array());
+        $container->register('console.command.cache_pool_prune')->addArgument([]);
         $container->register('pool.foo', FilesystemAdapter::class)->addTag('cache.pool');
         $container->register('pool.bar', PhpFilesAdapter::class)->addTag('cache.pool');
 
         $pass = new CachePoolPrunerPass();
         $pass->process($container);
 
-        $expected = array(
+        $expected = [
             'pool.foo' => new Reference('pool.foo'),
             'pool.bar' => new Reference('pool.bar'),
-        );
+        ];
         $argument = $container->getDefinition('console.command.cache_pool_prune')->getArgument(0);
 
         $this->assertInstanceOf(IteratorArgument::class, $argument);
@@ -63,7 +63,7 @@ class CachePoolPrunerPassTest extends TestCase
     public function testCompilerPassThrowsOnInvalidDefinitionClass()
     {
         $container = new ContainerBuilder();
-        $container->register('console.command.cache_pool_prune')->addArgument(array());
+        $container->register('console.command.cache_pool_prune')->addArgument([]);
         $container->register('pool.not-found', NotFound::class)->addTag('cache.pool');
 
         $pass = new CachePoolPrunerPass();
diff --git a/src/Symfony/Component/Cache/Tests/Fixtures/ArrayCache.php b/src/Symfony/Component/Cache/Tests/Fixtures/ArrayCache.php
index 27fb82de01..95b39d54bd 100644
--- a/src/Symfony/Component/Cache/Tests/Fixtures/ArrayCache.php
+++ b/src/Symfony/Component/Cache/Tests/Fixtures/ArrayCache.php
@@ -6,7 +6,7 @@ use Doctrine\Common\Cache\CacheProvider;
 
 class ArrayCache extends CacheProvider
 {
-    private $data = array();
+    private $data = [];
 
     protected function doFetch($id)
     {
@@ -26,7 +26,7 @@ class ArrayCache extends CacheProvider
 
     protected function doSave($id, $data, $lifeTime = 0)
     {
-        $this->data[$id] = array($data, $lifeTime ? microtime(true) + $lifeTime : false);
+        $this->data[$id] = [$data, $lifeTime ? microtime(true) + $lifeTime : false];
 
         return true;
     }
@@ -40,7 +40,7 @@ class ArrayCache extends CacheProvider
 
     protected function doFlush()
     {
-        $this->data = array();
+        $this->data = [];
 
         return true;
     }
diff --git a/src/Symfony/Component/Cache/Tests/Fixtures/ExternalAdapter.php b/src/Symfony/Component/Cache/Tests/Fixtures/ExternalAdapter.php
index 493906ea0c..779a374ec7 100644
--- a/src/Symfony/Component/Cache/Tests/Fixtures/ExternalAdapter.php
+++ b/src/Symfony/Component/Cache/Tests/Fixtures/ExternalAdapter.php
@@ -34,7 +34,7 @@ class ExternalAdapter implements CacheItemPoolInterface
         return $this->cache->getItem($key);
     }
 
-    public function getItems(array $keys = array())
+    public function getItems(array $keys = [])
     {
         return $this->cache->getItems($keys);
     }
diff --git a/src/Symfony/Component/Cache/Tests/LockRegistryTest.php b/src/Symfony/Component/Cache/Tests/LockRegistryTest.php
index 3f7d959570..0771347ed6 100644
--- a/src/Symfony/Component/Cache/Tests/LockRegistryTest.php
+++ b/src/Symfony/Component/Cache/Tests/LockRegistryTest.php
@@ -18,7 +18,7 @@ class LockRegistryTest extends TestCase
 {
     public function testFiles()
     {
-        $lockFiles = LockRegistry::setFiles(array());
+        $lockFiles = LockRegistry::setFiles([]);
         LockRegistry::setFiles($lockFiles);
         $expected = array_map('realpath', glob(__DIR__.'/../Adapter/*'));
         $this->assertSame($expected, $lockFiles);
diff --git a/src/Symfony/Component/Cache/Tests/Marshaller/DefaultMarshallerTest.php b/src/Symfony/Component/Cache/Tests/Marshaller/DefaultMarshallerTest.php
index fc625d12fc..daa1fd19f4 100644
--- a/src/Symfony/Component/Cache/Tests/Marshaller/DefaultMarshallerTest.php
+++ b/src/Symfony/Component/Cache/Tests/Marshaller/DefaultMarshallerTest.php
@@ -19,14 +19,14 @@ class DefaultMarshallerTest extends TestCase
     public function testSerialize()
     {
         $marshaller = new DefaultMarshaller();
-        $values = array(
+        $values = [
             'a' => 123,
             'b' => function () {},
-        );
+        ];
 
-        $expected = array('a' => \extension_loaded('igbinary') ? igbinary_serialize(123) : serialize(123));
+        $expected = ['a' => \extension_loaded('igbinary') ? igbinary_serialize(123) : serialize(123)];
         $this->assertSame($expected, $marshaller->marshall($values, $failed));
-        $this->assertSame(array('b'), $failed);
+        $this->assertSame(['b'], $failed);
     }
 
     public function testNativeUnserialize()
diff --git a/src/Symfony/Component/Cache/Tests/Simple/AbstractRedisCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/AbstractRedisCacheTest.php
index 3e668fdd12..dd5e1509c1 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/AbstractRedisCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/AbstractRedisCacheTest.php
@@ -15,11 +15,11 @@ use Symfony\Component\Cache\Simple\RedisCache;
 
 abstract class AbstractRedisCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testSetTtl' => 'Testing expiration slows down the test suite',
         'testSetMultipleTtl' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     protected static $redis;
 
diff --git a/src/Symfony/Component/Cache/Tests/Simple/ApcuCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/ApcuCacheTest.php
index 3df32c1c5e..f37b95a093 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/ApcuCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/ApcuCacheTest.php
@@ -15,11 +15,11 @@ use Symfony\Component\Cache\Simple\ApcuCache;
 
 class ApcuCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testSetTtl' => 'Testing expiration slows down the test suite',
         'testSetMultipleTtl' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     public function createSimpleCache($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Simple/CacheTestCase.php b/src/Symfony/Component/Cache/Tests/Simple/CacheTestCase.php
index 5b84d8b093..1a13cbaae8 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/CacheTestCase.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/CacheTestCase.php
@@ -28,7 +28,7 @@ abstract class CacheTestCase extends SimpleCacheTest
 
     public static function validKeys()
     {
-        return array_merge(parent::validKeys(), array(array("a\0b")));
+        return array_merge(parent::validKeys(), [["a\0b"]]);
     }
 
     public function testDefaultLifeTime()
@@ -64,9 +64,9 @@ abstract class CacheTestCase extends SimpleCacheTest
 
         $this->assertNull($cache->get('foo'));
 
-        $cache->setMultiple(array('foo' => new NotUnserializable()));
+        $cache->setMultiple(['foo' => new NotUnserializable()]);
 
-        foreach ($cache->getMultiple(array('foo')) as $value) {
+        foreach ($cache->getMultiple(['foo']) as $value) {
         }
         $this->assertNull($value);
 
diff --git a/src/Symfony/Component/Cache/Tests/Simple/ChainCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/ChainCacheTest.php
index ab28e3bce7..e6f7c7cc63 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/ChainCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/ChainCacheTest.php
@@ -24,7 +24,7 @@ class ChainCacheTest extends CacheTestCase
 {
     public function createSimpleCache($defaultLifetime = 0)
     {
-        return new ChainCache(array(new ArrayCache($defaultLifetime), new FilesystemCache('', $defaultLifetime)), $defaultLifetime);
+        return new ChainCache([new ArrayCache($defaultLifetime), new FilesystemCache('', $defaultLifetime)], $defaultLifetime);
     }
 
     /**
@@ -33,7 +33,7 @@ class ChainCacheTest extends CacheTestCase
      */
     public function testEmptyCachesException()
     {
-        new ChainCache(array());
+        new ChainCache([]);
     }
 
     /**
@@ -42,7 +42,7 @@ class ChainCacheTest extends CacheTestCase
      */
     public function testInvalidCacheException()
     {
-        new ChainCache(array(new \stdClass()));
+        new ChainCache([new \stdClass()]);
     }
 
     public function testPrune()
@@ -51,18 +51,18 @@ class ChainCacheTest extends CacheTestCase
             $this->markTestSkipped($this->skippedTests[__FUNCTION__]);
         }
 
-        $cache = new ChainCache(array(
+        $cache = new ChainCache([
             $this->getPruneableMock(),
             $this->getNonPruneableMock(),
             $this->getPruneableMock(),
-        ));
+        ]);
         $this->assertTrue($cache->prune());
 
-        $cache = new ChainCache(array(
+        $cache = new ChainCache([
             $this->getPruneableMock(),
             $this->getFailingPruneableMock(),
             $this->getPruneableMock(),
-        ));
+        ]);
         $this->assertFalse($cache->prune());
     }
 
diff --git a/src/Symfony/Component/Cache/Tests/Simple/DoctrineCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/DoctrineCacheTest.php
index 127c96858c..af4331d69b 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/DoctrineCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/DoctrineCacheTest.php
@@ -19,10 +19,10 @@ use Symfony\Component\Cache\Tests\Fixtures\ArrayCache;
  */
 class DoctrineCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testObjectDoesNotChangeInCache' => 'ArrayCache does not use serialize/unserialize',
         'testNotUnserializable' => 'ArrayCache does not use serialize/unserialize',
-    );
+    ];
 
     public function createSimpleCache($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
index ee9e49d3dd..f83f0a2e34 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTest.php
@@ -16,11 +16,11 @@ use Symfony\Component\Cache\Simple\MemcachedCache;
 
 class MemcachedCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testSetTtl' => 'Testing expiration slows down the test suite',
         'testSetMultipleTtl' => 'Testing expiration slows down the test suite',
         'testDefaultLifeTime' => 'Testing expiration slows down the test suite',
-    );
+    ];
 
     protected static $client;
 
@@ -40,29 +40,29 @@ class MemcachedCacheTest extends CacheTestCase
 
     public function createSimpleCache($defaultLifetime = 0)
     {
-        $client = $defaultLifetime ? AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), array('binary_protocol' => false)) : self::$client;
+        $client = $defaultLifetime ? AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), ['binary_protocol' => false]) : self::$client;
 
         return new MemcachedCache($client, str_replace('\\', '.', __CLASS__), $defaultLifetime);
     }
 
     public function testCreatePersistentConnectionShouldNotDupServerList()
     {
-        $instance = MemcachedCache::createConnection('memcached://'.getenv('MEMCACHED_HOST'), array('persistent_id' => 'persistent'));
+        $instance = MemcachedCache::createConnection('memcached://'.getenv('MEMCACHED_HOST'), ['persistent_id' => 'persistent']);
         $this->assertCount(1, $instance->getServerList());
 
-        $instance = MemcachedCache::createConnection('memcached://'.getenv('MEMCACHED_HOST'), array('persistent_id' => 'persistent'));
+        $instance = MemcachedCache::createConnection('memcached://'.getenv('MEMCACHED_HOST'), ['persistent_id' => 'persistent']);
         $this->assertCount(1, $instance->getServerList());
     }
 
     public function testOptions()
     {
-        $client = MemcachedCache::createConnection(array(), array(
+        $client = MemcachedCache::createConnection([], [
             'libketama_compatible' => false,
             'distribution' => 'modula',
             'compression' => true,
             'serializer' => 'php',
             'hash' => 'md5',
-        ));
+        ]);
 
         $this->assertSame(\Memcached::SERIALIZER_PHP, $client->getOption(\Memcached::OPT_SERIALIZER));
         $this->assertSame(\Memcached::HASH_MD5, $client->getOption(\Memcached::OPT_HASH));
@@ -78,24 +78,24 @@ class MemcachedCacheTest extends CacheTestCase
      */
     public function testBadOptions($name, $value)
     {
-        MemcachedCache::createConnection(array(), array($name => $value));
+        MemcachedCache::createConnection([], [$name => $value]);
     }
 
     public function provideBadOptions()
     {
-        return array(
-            array('foo', 'bar'),
-            array('hash', 'zyx'),
-            array('serializer', 'zyx'),
-            array('distribution', 'zyx'),
-        );
+        return [
+            ['foo', 'bar'],
+            ['hash', 'zyx'],
+            ['serializer', 'zyx'],
+            ['distribution', 'zyx'],
+        ];
     }
 
     public function testDefaultOptions()
     {
         $this->assertTrue(MemcachedCache::isSupported());
 
-        $client = MemcachedCache::createConnection(array());
+        $client = MemcachedCache::createConnection([]);
 
         $this->assertTrue($client->getOption(\Memcached::OPT_COMPRESSION));
         $this->assertSame(1, $client->getOption(\Memcached::OPT_BINARY_PROTOCOL));
@@ -112,7 +112,7 @@ class MemcachedCacheTest extends CacheTestCase
             $this->markTestSkipped('Memcached::HAVE_JSON required');
         }
 
-        new MemcachedCache(MemcachedCache::createConnection(array(), array('serializer' => 'json')));
+        new MemcachedCache(MemcachedCache::createConnection([], ['serializer' => 'json']));
     }
 
     /**
@@ -121,54 +121,54 @@ class MemcachedCacheTest extends CacheTestCase
     public function testServersSetting($dsn, $host, $port)
     {
         $client1 = MemcachedCache::createConnection($dsn);
-        $client2 = MemcachedCache::createConnection(array($dsn));
-        $client3 = MemcachedCache::createConnection(array(array($host, $port)));
-        $expect = array(
+        $client2 = MemcachedCache::createConnection([$dsn]);
+        $client3 = MemcachedCache::createConnection([[$host, $port]]);
+        $expect = [
             'host' => $host,
             'port' => $port,
-        );
+        ];
 
-        $f = function ($s) { return array('host' => $s['host'], 'port' => $s['port']); };
-        $this->assertSame(array($expect), array_map($f, $client1->getServerList()));
-        $this->assertSame(array($expect), array_map($f, $client2->getServerList()));
-        $this->assertSame(array($expect), array_map($f, $client3->getServerList()));
+        $f = function ($s) { return ['host' => $s['host'], 'port' => $s['port']]; };
+        $this->assertSame([$expect], array_map($f, $client1->getServerList()));
+        $this->assertSame([$expect], array_map($f, $client2->getServerList()));
+        $this->assertSame([$expect], array_map($f, $client3->getServerList()));
     }
 
     public function provideServersSetting()
     {
-        yield array(
+        yield [
             'memcached://127.0.0.1/50',
             '127.0.0.1',
             11211,
-        );
-        yield array(
+        ];
+        yield [
             'memcached://localhost:11222?weight=25',
             'localhost',
             11222,
-        );
+        ];
         if (filter_var(ini_get('memcached.use_sasl'), FILTER_VALIDATE_BOOLEAN)) {
-            yield array(
+            yield [
                 'memcached://user:password@127.0.0.1?weight=50',
                 '127.0.0.1',
                 11211,
-            );
+            ];
         }
-        yield array(
+        yield [
             'memcached:///var/run/memcached.sock?weight=25',
             '/var/run/memcached.sock',
             0,
-        );
-        yield array(
+        ];
+        yield [
             'memcached:///var/local/run/memcached.socket?weight=25',
             '/var/local/run/memcached.socket',
             0,
-        );
+        ];
         if (filter_var(ini_get('memcached.use_sasl'), FILTER_VALIDATE_BOOLEAN)) {
-            yield array(
+            yield [
                 'memcached://user:password@/var/local/run/memcached.socket?weight=25',
                 '/var/local/run/memcached.socket',
                 0,
-            );
+            ];
         }
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTextModeTest.php b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTextModeTest.php
index 43cadf9034..13865a6098 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTextModeTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/MemcachedCacheTextModeTest.php
@@ -18,7 +18,7 @@ class MemcachedCacheTextModeTest extends MemcachedCacheTest
 {
     public function createSimpleCache($defaultLifetime = 0)
     {
-        $client = AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), array('binary_protocol' => false));
+        $client = AbstractAdapter::createConnection('memcached://'.getenv('MEMCACHED_HOST'), ['binary_protocol' => false]);
 
         return new MemcachedCache($client, str_replace('\\', '.', __CLASS__), $defaultLifetime);
     }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/NullCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/NullCacheTest.php
index 7b760fd3bd..31f42c32b6 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/NullCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/NullCacheTest.php
@@ -40,7 +40,7 @@ class NullCacheTest extends TestCase
     {
         $cache = $this->createCachePool();
 
-        $keys = array('foo', 'bar', 'baz', 'biz');
+        $keys = ['foo', 'bar', 'baz', 'biz'];
 
         $default = new \stdClass();
         $items = $cache->getMultiple($keys, $default);
@@ -75,7 +75,7 @@ class NullCacheTest extends TestCase
 
     public function testDeleteMultiple()
     {
-        $this->assertTrue($this->createCachePool()->deleteMultiple(array('key', 'foo', 'bar')));
+        $this->assertTrue($this->createCachePool()->deleteMultiple(['key', 'foo', 'bar']));
     }
 
     public function testSet()
@@ -90,7 +90,7 @@ class NullCacheTest extends TestCase
     {
         $cache = $this->createCachePool();
 
-        $this->assertFalse($cache->setMultiple(array('key' => 'val')));
+        $this->assertFalse($cache->setMultiple(['key' => 'val']));
         $this->assertNull($cache->get('key'));
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/PdoDbalCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/PdoDbalCacheTest.php
index 158e2c8924..ce1a9ae4f8 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/PdoDbalCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/PdoDbalCacheTest.php
@@ -32,7 +32,7 @@ class PdoDbalCacheTest extends CacheTestCase
 
         self::$dbFile = tempnam(sys_get_temp_dir(), 'sf_sqlite_cache');
 
-        $pool = new PdoCache(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)));
+        $pool = new PdoCache(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]));
         $pool->createTable();
     }
 
@@ -43,6 +43,6 @@ class PdoDbalCacheTest extends CacheTestCase
 
     public function createSimpleCache($defaultLifetime = 0)
     {
-        return new PdoCache(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)), '', $defaultLifetime);
+        return new PdoCache(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]), '', $defaultLifetime);
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheTest.php
index 724744cb9a..ba4bde3139 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheTest.php
@@ -20,7 +20,7 @@ use Symfony\Component\Cache\Tests\Adapter\FilesystemAdapterTest;
  */
 class PhpArrayCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testBasicUsageWithLongKey' => 'PhpArrayCache does no writes',
 
         'testDelete' => 'PhpArrayCache does no writes',
@@ -45,7 +45,7 @@ class PhpArrayCacheTest extends CacheTestCase
 
         'testDefaultLifeTime' => 'PhpArrayCache does not allow configuring a default lifetime.',
         'testPrune' => 'PhpArrayCache just proxies',
-    );
+    ];
 
     protected static $file;
 
@@ -68,22 +68,22 @@ class PhpArrayCacheTest extends CacheTestCase
 
     public function testStore()
     {
-        $arrayWithRefs = array();
+        $arrayWithRefs = [];
         $arrayWithRefs[0] = 123;
         $arrayWithRefs[1] = &$arrayWithRefs[0];
 
-        $object = (object) array(
+        $object = (object) [
             'foo' => 'bar',
             'foo2' => 'bar2',
-        );
+        ];
 
-        $expected = array(
+        $expected = [
             'null' => null,
             'serializedString' => serialize($object),
             'arrayWithRefs' => $arrayWithRefs,
             'object' => $object,
-            'arrayWithObject' => array('bar' => $object),
-        );
+            'arrayWithObject' => ['bar' => $object],
+        ];
 
         $cache = new PhpArrayCache(self::$file, new NullCache());
         $cache->warmUp($expected);
@@ -95,29 +95,29 @@ class PhpArrayCacheTest extends CacheTestCase
 
     public function testStoredFile()
     {
-        $data = array(
+        $data = [
             'integer' => 42,
             'float' => 42.42,
             'boolean' => true,
-            'array_simple' => array('foo', 'bar'),
-            'array_associative' => array('foo' => 'bar', 'foo2' => 'bar2'),
-        );
-        $expected = array(
-            array(
+            'array_simple' => ['foo', 'bar'],
+            'array_associative' => ['foo' => 'bar', 'foo2' => 'bar2'],
+        ];
+        $expected = [
+            [
                 'integer' => 0,
                 'float' => 1,
                 'boolean' => 2,
                 'array_simple' => 3,
                 'array_associative' => 4,
-            ),
-            array(
+            ],
+            [
                 0 => 42,
                 1 => 42.42,
                 2 => true,
-                3 => array('foo', 'bar'),
-                4 => array('foo' => 'bar', 'foo2' => 'bar2'),
-            ),
-        );
+                3 => ['foo', 'bar'],
+                4 => ['foo' => 'bar', 'foo2' => 'bar2'],
+            ],
+        ];
 
         $cache = new PhpArrayCache(self::$file, new NullCache());
         $cache->warmUp($data);
@@ -130,7 +130,7 @@ class PhpArrayCacheTest extends CacheTestCase
 
 class PhpArrayCacheWrapper extends PhpArrayCache
 {
-    protected $data = array();
+    protected $data = [];
 
     public function set($key, $value, $ttl = null)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheWithFallbackTest.php b/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheWithFallbackTest.php
index 4b6a94f709..abee5e7872 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheWithFallbackTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/PhpArrayCacheWithFallbackTest.php
@@ -20,7 +20,7 @@ use Symfony\Component\Cache\Tests\Adapter\FilesystemAdapterTest;
  */
 class PhpArrayCacheWithFallbackTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testGetInvalidKeys' => 'PhpArrayCache does no validation',
         'testGetMultipleInvalidKeys' => 'PhpArrayCache does no validation',
         'testDeleteInvalidKeys' => 'PhpArrayCache does no validation',
@@ -32,7 +32,7 @@ class PhpArrayCacheWithFallbackTest extends CacheTestCase
         'testSetMultipleInvalidTtl' => 'PhpArrayCache does no validation',
         'testHasInvalidKeys' => 'PhpArrayCache does no validation',
         'testPrune' => 'PhpArrayCache just proxies',
-    );
+    ];
 
     protected static $file;
 
diff --git a/src/Symfony/Component/Cache/Tests/Simple/PhpFilesCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/PhpFilesCacheTest.php
index 38e5ee90b1..3a68dd3984 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/PhpFilesCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/PhpFilesCacheTest.php
@@ -19,9 +19,9 @@ use Symfony\Component\Cache\Simple\PhpFilesCache;
  */
 class PhpFilesCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testDefaultLifeTime' => 'PhpFilesCache does not allow configuring a default lifetime.',
-    );
+    ];
 
     public function createSimpleCache()
     {
diff --git a/src/Symfony/Component/Cache/Tests/Simple/Psr6CacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/Psr6CacheTest.php
index 78582894fb..1bc75c9060 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/Psr6CacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/Psr6CacheTest.php
@@ -19,9 +19,9 @@ use Symfony\Component\Cache\Simple\Psr6Cache;
  */
 class Psr6CacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testPrune' => 'Psr6Cache just proxies',
-    );
+    ];
 
     public function createSimpleCache($defaultLifetime = 0)
     {
diff --git a/src/Symfony/Component/Cache/Tests/Simple/RedisArrayCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/RedisArrayCacheTest.php
index 3c903c8a9b..bda39d990b 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/RedisArrayCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/RedisArrayCacheTest.php
@@ -19,6 +19,6 @@ class RedisArrayCacheTest extends AbstractRedisCacheTest
         if (!class_exists('RedisArray')) {
             self::markTestSkipped('The RedisArray class is required.');
         }
-        self::$redis = new \RedisArray(array(getenv('REDIS_HOST')), array('lazy_connect' => true));
+        self::$redis = new \RedisArray([getenv('REDIS_HOST')], ['lazy_connect' => true]);
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/RedisCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/RedisCacheTest.php
index d33421f9aa..407d916c73 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/RedisCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/RedisCacheTest.php
@@ -33,13 +33,13 @@ class RedisCacheTest extends AbstractRedisCacheTest
         $redis = RedisCache::createConnection('redis://'.$redisHost.'/2');
         $this->assertSame(2, $redis->getDbNum());
 
-        $redis = RedisCache::createConnection('redis://'.$redisHost, array('timeout' => 3));
+        $redis = RedisCache::createConnection('redis://'.$redisHost, ['timeout' => 3]);
         $this->assertEquals(3, $redis->getTimeout());
 
         $redis = RedisCache::createConnection('redis://'.$redisHost.'?timeout=4');
         $this->assertEquals(4, $redis->getTimeout());
 
-        $redis = RedisCache::createConnection('redis://'.$redisHost, array('read_timeout' => 5));
+        $redis = RedisCache::createConnection('redis://'.$redisHost, ['read_timeout' => 5]);
         $this->assertEquals(5, $redis->getReadTimeout());
     }
 
@@ -55,11 +55,11 @@ class RedisCacheTest extends AbstractRedisCacheTest
 
     public function provideFailedCreateConnection()
     {
-        return array(
-            array('redis://localhost:1234'),
-            array('redis://foo@localhost'),
-            array('redis://localhost/123'),
-        );
+        return [
+            ['redis://localhost:1234'],
+            ['redis://foo@localhost'],
+            ['redis://localhost/123'],
+        ];
     }
 
     /**
@@ -74,9 +74,9 @@ class RedisCacheTest extends AbstractRedisCacheTest
 
     public function provideInvalidCreateConnection()
     {
-        return array(
-            array('foo://localhost'),
-            array('redis://'),
-        );
+        return [
+            ['foo://localhost'],
+            ['redis://'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Cache/Tests/Simple/TraceableCacheTest.php b/src/Symfony/Component/Cache/Tests/Simple/TraceableCacheTest.php
index 535f93da4b..e684caf36e 100644
--- a/src/Symfony/Component/Cache/Tests/Simple/TraceableCacheTest.php
+++ b/src/Symfony/Component/Cache/Tests/Simple/TraceableCacheTest.php
@@ -19,9 +19,9 @@ use Symfony\Component\Cache\Simple\TraceableCache;
  */
 class TraceableCacheTest extends CacheTestCase
 {
-    protected $skippedTests = array(
+    protected $skippedTests = [
         'testPrune' => 'TraceableCache just proxies',
-    );
+    ];
 
     public function createSimpleCache($defaultLifetime = 0)
     {
@@ -37,7 +37,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[0];
         $this->assertSame('get', $call->name);
-        $this->assertSame(array('k' => false), $call->result);
+        $this->assertSame(['k' => false], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(1, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -61,7 +61,7 @@ class TraceableCacheTest extends CacheTestCase
     {
         $pool = $this->createSimpleCache();
         $pool->set('k1', 123);
-        $values = $pool->getMultiple(array('k0', 'k1'));
+        $values = $pool->getMultiple(['k0', 'k1']);
         foreach ($values as $value) {
         }
         $calls = $pool->getCalls();
@@ -69,7 +69,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[1];
         $this->assertSame('getMultiple', $call->name);
-        $this->assertSame(array('k1' => true, 'k0' => false), $call->result);
+        $this->assertSame(['k1' => true, 'k0' => false], $call->result);
         $this->assertSame(1, $call->misses);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
@@ -84,7 +84,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[0];
         $this->assertSame('has', $call->name);
-        $this->assertSame(array('k' => false), $call->result);
+        $this->assertSame(['k' => false], $call->result);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
     }
@@ -99,7 +99,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[1];
         $this->assertSame('has', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertNotEmpty($call->start);
         $this->assertNotEmpty($call->end);
     }
@@ -113,7 +113,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[0];
         $this->assertSame('delete', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -123,14 +123,14 @@ class TraceableCacheTest extends CacheTestCase
     public function testDeleteMultipleTrace()
     {
         $pool = $this->createSimpleCache();
-        $arg = array('k0', 'k1');
+        $arg = ['k0', 'k1'];
         $pool->deleteMultiple($arg);
         $calls = $pool->getCalls();
         $this->assertCount(1, $calls);
 
         $call = $calls[0];
         $this->assertSame('deleteMultiple', $call->name);
-        $this->assertSame(array('keys' => $arg, 'result' => true), $call->result);
+        $this->assertSame(['keys' => $arg, 'result' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -146,7 +146,7 @@ class TraceableCacheTest extends CacheTestCase
 
         $call = $calls[0];
         $this->assertSame('set', $call->name);
-        $this->assertSame(array('k' => true), $call->result);
+        $this->assertSame(['k' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
@@ -156,13 +156,13 @@ class TraceableCacheTest extends CacheTestCase
     public function testSetMultipleTrace()
     {
         $pool = $this->createSimpleCache();
-        $pool->setMultiple(array('k' => 'foo'));
+        $pool->setMultiple(['k' => 'foo']);
         $calls = $pool->getCalls();
         $this->assertCount(1, $calls);
 
         $call = $calls[0];
         $this->assertSame('setMultiple', $call->name);
-        $this->assertSame(array('keys' => array('k'), 'result' => true), $call->result);
+        $this->assertSame(['keys' => ['k'], 'result' => true], $call->result);
         $this->assertSame(0, $call->hits);
         $this->assertSame(0, $call->misses);
         $this->assertNotEmpty($call->start);
diff --git a/src/Symfony/Component/Cache/Traits/AbstractTrait.php b/src/Symfony/Component/Cache/Traits/AbstractTrait.php
index 01351f11c9..2553ea75cb 100644
--- a/src/Symfony/Component/Cache/Traits/AbstractTrait.php
+++ b/src/Symfony/Component/Cache/Traits/AbstractTrait.php
@@ -26,8 +26,8 @@ trait AbstractTrait
     private $namespace;
     private $namespaceVersion = '';
     private $versioningIsEnabled = false;
-    private $deferred = array();
-    private $ids = array();
+    private $deferred = [];
+    private $ids = [];
 
     /**
      * @var int|null The maximum length to enforce for identifiers or null when no limit applies
@@ -94,7 +94,7 @@ trait AbstractTrait
         try {
             return $this->doHave($id);
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to check if key "{key}" is cached', array('key' => $key, 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to check if key "{key}" is cached', ['key' => $key, 'exception' => $e]);
 
             return false;
         }
@@ -105,24 +105,24 @@ trait AbstractTrait
      */
     public function clear()
     {
-        $this->deferred = array();
+        $this->deferred = [];
         if ($cleared = $this->versioningIsEnabled) {
             $namespaceVersion = substr_replace(base64_encode(pack('V', mt_rand())), ':', 5);
             try {
-                $cleared = $this->doSave(array('/'.$this->namespace => $namespaceVersion), 0);
+                $cleared = $this->doSave(['/'.$this->namespace => $namespaceVersion], 0);
             } catch (\Exception $e) {
                 $cleared = false;
             }
-            if ($cleared = true === $cleared || array() === $cleared) {
+            if ($cleared = true === $cleared || [] === $cleared) {
                 $this->namespaceVersion = $namespaceVersion;
-                $this->ids = array();
+                $this->ids = [];
             }
         }
 
         try {
             return $this->doClear($this->namespace) || $cleared;
         } catch (\Exception $e) {
-            CacheItem::log($this->logger, 'Failed to clear the cache', array('exception' => $e));
+            CacheItem::log($this->logger, 'Failed to clear the cache', ['exception' => $e]);
 
             return false;
         }
@@ -133,7 +133,7 @@ trait AbstractTrait
      */
     public function deleteItem($key)
     {
-        return $this->deleteItems(array($key));
+        return $this->deleteItems([$key]);
     }
 
     /**
@@ -141,7 +141,7 @@ trait AbstractTrait
      */
     public function deleteItems(array $keys)
     {
-        $ids = array();
+        $ids = [];
 
         foreach ($keys as $key) {
             $ids[$key] = $this->getId($key);
@@ -161,12 +161,12 @@ trait AbstractTrait
         foreach ($ids as $key => $id) {
             try {
                 $e = null;
-                if ($this->doDelete(array($id))) {
+                if ($this->doDelete([$id])) {
                     continue;
                 }
             } catch (\Exception $e) {
             }
-            CacheItem::log($this->logger, 'Failed to delete key "{key}"', array('key' => $key, 'exception' => $e));
+            CacheItem::log($this->logger, 'Failed to delete key "{key}"', ['key' => $key, 'exception' => $e]);
             $ok = false;
         }
 
@@ -190,7 +190,7 @@ trait AbstractTrait
         $wasEnabled = $this->versioningIsEnabled;
         $this->versioningIsEnabled = (bool) $enable;
         $this->namespaceVersion = '';
-        $this->ids = array();
+        $this->ids = [];
 
         return $wasEnabled;
     }
@@ -204,7 +204,7 @@ trait AbstractTrait
             $this->commit();
         }
         $this->namespaceVersion = '';
-        $this->ids = array();
+        $this->ids = [];
     }
 
     /**
@@ -241,15 +241,15 @@ trait AbstractTrait
     private function getId($key)
     {
         if ($this->versioningIsEnabled && '' === $this->namespaceVersion) {
-            $this->ids = array();
+            $this->ids = [];
             $this->namespaceVersion = '1/';
             try {
-                foreach ($this->doFetch(array('/'.$this->namespace)) as $v) {
+                foreach ($this->doFetch(['/'.$this->namespace]) as $v) {
                     $this->namespaceVersion = $v;
                 }
                 if ('1:' === $this->namespaceVersion) {
                     $this->namespaceVersion = substr_replace(base64_encode(pack('V', time())), ':', 5);
-                    $this->doSave(array('@'.$this->namespace => $this->namespaceVersion), 0);
+                    $this->doSave(['@'.$this->namespace => $this->namespaceVersion], 0);
                 }
             } catch (\Exception $e) {
             }
diff --git a/src/Symfony/Component/Cache/Traits/ApcuTrait.php b/src/Symfony/Component/Cache/Traits/ApcuTrait.php
index a93fc812a1..c86b043ae1 100644
--- a/src/Symfony/Component/Cache/Traits/ApcuTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ApcuTrait.php
@@ -53,8 +53,8 @@ trait ApcuTrait
     {
         $unserializeCallbackHandler = ini_set('unserialize_callback_func', __CLASS__.'::handleUnserializeCallback');
         try {
-            $values = array();
-            foreach (apcu_fetch($ids, $ok) ?: array() as $k => $v) {
+            $values = [];
+            foreach (apcu_fetch($ids, $ok) ?: [] as $k => $v) {
                 if (null !== $v || $ok) {
                     $values[$k] = $v;
                 }
diff --git a/src/Symfony/Component/Cache/Traits/ArrayTrait.php b/src/Symfony/Component/Cache/Traits/ArrayTrait.php
index 8268e40db4..e585c3d48c 100644
--- a/src/Symfony/Component/Cache/Traits/ArrayTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ArrayTrait.php
@@ -24,8 +24,8 @@ trait ArrayTrait
     use LoggerAwareTrait;
 
     private $storeSerialized;
-    private $values = array();
-    private $expiries = array();
+    private $values = [];
+    private $expiries = [];
 
     /**
      * Returns all cached values, with cache miss as null.
@@ -69,7 +69,7 @@ trait ArrayTrait
      */
     public function clear()
     {
-        $this->values = $this->expiries = array();
+        $this->values = $this->expiries = [];
 
         return true;
     }
@@ -128,7 +128,7 @@ trait ArrayTrait
                 $serialized = serialize($value);
             } catch (\Exception $e) {
                 $type = \is_object($value) ? \get_class($value) : \gettype($value);
-                CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', array('key' => $key, 'type' => $type, 'exception' => $e));
+                CacheItem::log($this->logger, 'Failed to save key "{key}" ({type})', ['key' => $key, 'type' => $type, 'exception' => $e]);
 
                 return;
             }
@@ -150,7 +150,7 @@ trait ArrayTrait
             try {
                 $value = unserialize($value);
             } catch (\Exception $e) {
-                CacheItem::log($this->logger, 'Failed to unserialize key "{key}"', array('key' => $key, 'exception' => $e));
+                CacheItem::log($this->logger, 'Failed to unserialize key "{key}"', ['key' => $key, 'exception' => $e]);
                 $value = false;
             }
             if (false === $value) {
diff --git a/src/Symfony/Component/Cache/Traits/ContractsTrait.php b/src/Symfony/Component/Cache/Traits/ContractsTrait.php
index f755e65fc3..8b1eb5a244 100644
--- a/src/Symfony/Component/Cache/Traits/ContractsTrait.php
+++ b/src/Symfony/Component/Cache/Traits/ContractsTrait.php
@@ -30,7 +30,7 @@ trait ContractsTrait
         doGet as private contractsGet;
     }
 
-    private $callbackWrapper = array(LockRegistry::class, 'compute');
+    private $callbackWrapper = [LockRegistry::class, 'compute'];
 
     /**
      * Wraps the callback passed to ->get() in a callable.
diff --git a/src/Symfony/Component/Cache/Traits/FilesystemTrait.php b/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
index 52dcf985dd..9c444f9b04 100644
--- a/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
+++ b/src/Symfony/Component/Cache/Traits/FilesystemTrait.php
@@ -54,7 +54,7 @@ trait FilesystemTrait
      */
     protected function doFetch(array $ids)
     {
-        $values = array();
+        $values = [];
         $now = time();
 
         foreach ($ids as $id) {
@@ -85,7 +85,7 @@ trait FilesystemTrait
     {
         $file = $this->getFile($id);
 
-        return file_exists($file) && (@filemtime($file) > time() || $this->doFetch(array($id)));
+        return file_exists($file) && (@filemtime($file) > time() || $this->doFetch([$id]));
     }
 
     /**
diff --git a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
index 1e1718a412..b83d695937 100644
--- a/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
+++ b/src/Symfony/Component/Cache/Traits/MemcachedTrait.php
@@ -24,12 +24,12 @@ use Symfony\Component\Cache\Marshaller\MarshallerInterface;
  */
 trait MemcachedTrait
 {
-    private static $defaultClientOptions = array(
+    private static $defaultClientOptions = [
         'persistent_id' => null,
         'username' => null,
         'password' => null,
         'serializer' => 'php',
-    );
+    ];
 
     private $marshaller;
     private $client;
@@ -68,7 +68,7 @@ trait MemcachedTrait
      *
      * Examples for servers:
      * - 'memcached://user:pass@localhost?weight=33'
-     * - array(array('localhost', 11211, 33))
+     * - [['localhost', 11211, 33]]
      *
      * @param array[]|string|string[] $servers An array of servers, a DSN, or an array of DSNs
      * @param array                   $options An array of options
@@ -77,10 +77,10 @@ trait MemcachedTrait
      *
      * @throws \ErrorException When invalid options or servers are provided
      */
-    public static function createConnection($servers, array $options = array())
+    public static function createConnection($servers, array $options = [])
     {
         if (\is_string($servers)) {
-            $servers = array($servers);
+            $servers = [$servers];
         } elseif (!\is_array($servers)) {
             throw new InvalidArgumentException(sprintf('MemcachedAdapter::createClient() expects array or string as first argument, %s given.', \gettype($servers)));
         }
@@ -104,7 +104,7 @@ trait MemcachedTrait
                 }
                 $params = preg_replace_callback('#^memcached:(//)?(?:([^@]*+)@)?#', function ($m) use (&$username, &$password) {
                     if (!empty($m[2])) {
-                        list($username, $password) = explode(':', $m[2], 2) + array(1 => null);
+                        list($username, $password) = explode(':', $m[2], 2) + [1 => null];
                     }
 
                     return 'file:'.($m[1] ?? '');
@@ -112,7 +112,7 @@ trait MemcachedTrait
                 if (false === $params = parse_url($params)) {
                     throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: %s', $dsn));
                 }
-                $query = $hosts = array();
+                $query = $hosts = [];
                 if (isset($params['query'])) {
                     parse_str($params['query'], $query);
 
@@ -122,9 +122,9 @@ trait MemcachedTrait
                         }
                         foreach ($hosts as $host => $weight) {
                             if (false === $port = strrpos($host, ':')) {
-                                $hosts[$host] = array($host, 11211, (int) $weight);
+                                $hosts[$host] = [$host, 11211, (int) $weight];
                             } else {
-                                $hosts[$host] = array(substr($host, 0, $port), (int) substr($host, 1 + $port), (int) $weight);
+                                $hosts[$host] = [substr($host, 0, $port), (int) substr($host, 1 + $port), (int) $weight];
                             }
                         }
                         $hosts = array_values($hosts);
@@ -143,17 +143,17 @@ trait MemcachedTrait
                     $params['weight'] = $m[1];
                     $params['path'] = substr($params['path'], 0, -\strlen($m[0]));
                 }
-                $params += array(
+                $params += [
                     'host' => isset($params['host']) ? $params['host'] : $params['path'],
                     'port' => isset($params['host']) ? 11211 : null,
                     'weight' => 0,
-                );
+                ];
                 if ($query) {
                     $params += $query;
                     $options = $query + $options;
                 }
 
-                $servers[$i] = array($params['host'], $params['port'], $params['weight']);
+                $servers[$i] = [$params['host'], $params['port'], $params['weight']];
 
                 if ($hosts) {
                     $servers = array_merge($servers, $hosts);
@@ -185,12 +185,12 @@ trait MemcachedTrait
 
             // set client's servers, taking care of persistent connections
             if (!$client->isPristine()) {
-                $oldServers = array();
+                $oldServers = [];
                 foreach ($client->getServerList() as $server) {
-                    $oldServers[] = array($server['host'], $server['port']);
+                    $oldServers[] = [$server['host'], $server['port']];
                 }
 
-                $newServers = array();
+                $newServers = [];
                 foreach ($servers as $server) {
                     if (1 < \count($server)) {
                         $server = array_values($server);
@@ -234,7 +234,7 @@ trait MemcachedTrait
             $lifetime += time();
         }
 
-        $encodedValues = array();
+        $encodedValues = [];
         foreach ($values as $key => $value) {
             $encodedValues[rawurlencode($key)] = $value;
         }
@@ -252,7 +252,7 @@ trait MemcachedTrait
 
             $encodedResult = $this->checkResultCode($this->getClient()->getMulti($encodedIds));
 
-            $result = array();
+            $result = [];
             foreach ($encodedResult as $key => $value) {
                 $result[rawurldecode($key)] = $this->marshaller->unmarshall($value);
             }
diff --git a/src/Symfony/Component/Cache/Traits/PdoTrait.php b/src/Symfony/Component/Cache/Traits/PdoTrait.php
index ea4feee4ac..9917bd91f5 100644
--- a/src/Symfony/Component/Cache/Traits/PdoTrait.php
+++ b/src/Symfony/Component/Cache/Traits/PdoTrait.php
@@ -37,7 +37,7 @@ trait PdoTrait
     private $timeCol = 'item_time';
     private $username = '';
     private $password = '';
-    private $connectionOptions = array();
+    private $connectionOptions = [];
     private $namespace;
 
     private function init($connOrDsn, $namespace, $defaultLifetime, array $options, ?MarshallerInterface $marshaller)
@@ -90,24 +90,24 @@ trait PdoTrait
         $conn = $this->getConnection();
 
         if ($conn instanceof Connection) {
-            $types = array(
+            $types = [
                 'mysql' => 'binary',
                 'sqlite' => 'text',
                 'pgsql' => 'string',
                 'oci' => 'string',
                 'sqlsrv' => 'string',
-            );
+            ];
             if (!isset($types[$this->driver])) {
                 throw new \DomainException(sprintf('Creating the cache table is currently not implemented for PDO driver "%s".', $this->driver));
             }
 
             $schema = new Schema();
             $table = $schema->createTable($this->table);
-            $table->addColumn($this->idCol, $types[$this->driver], array('length' => 255));
-            $table->addColumn($this->dataCol, 'blob', array('length' => 16777215));
-            $table->addColumn($this->lifetimeCol, 'integer', array('unsigned' => true, 'notnull' => false));
-            $table->addColumn($this->timeCol, 'integer', array('unsigned' => true));
-            $table->setPrimaryKey(array($this->idCol));
+            $table->addColumn($this->idCol, $types[$this->driver], ['length' => 255]);
+            $table->addColumn($this->dataCol, 'blob', ['length' => 16777215]);
+            $table->addColumn($this->lifetimeCol, 'integer', ['unsigned' => true, 'notnull' => false]);
+            $table->addColumn($this->timeCol, 'integer', ['unsigned' => true]);
+            $table->setPrimaryKey([$this->idCol]);
 
             foreach ($schema->toSql($conn->getDatabasePlatform()) as $sql) {
                 $conn->exec($sql);
@@ -175,7 +175,7 @@ trait PdoTrait
     protected function doFetch(array $ids)
     {
         $now = time();
-        $expired = array();
+        $expired = [];
 
         $sql = str_pad('', (\count($ids) << 1) - 1, '?,');
         $sql = "SELECT $this->idCol, CASE WHEN $this->lifetimeCol IS NULL OR $this->lifetimeCol + $this->timeCol > ? THEN $this->dataCol ELSE NULL END FROM $this->table WHERE $this->idCol IN ($sql)";
@@ -309,7 +309,7 @@ trait PdoTrait
         try {
             $stmt = $conn->prepare($sql);
         } catch (TableNotFoundException $e) {
-            if (!$conn->isTransactionActive() || \in_array($this->driver, array('pgsql', 'sqlite', 'sqlsrv'), true)) {
+            if (!$conn->isTransactionActive() || \in_array($this->driver, ['pgsql', 'sqlite', 'sqlsrv'], true)) {
                 $this->createTable();
             }
             $stmt = $conn->prepare($sql);
diff --git a/src/Symfony/Component/Cache/Traits/PhpArrayTrait.php b/src/Symfony/Component/Cache/Traits/PhpArrayTrait.php
index 587da5a498..0bec18a07a 100644
--- a/src/Symfony/Component/Cache/Traits/PhpArrayTrait.php
+++ b/src/Symfony/Component/Cache/Traits/PhpArrayTrait.php
@@ -57,13 +57,13 @@ trait PhpArrayTrait
         }
 
         $dumpedValues = '';
-        $dumpedMap = array();
+        $dumpedMap = [];
         $dump = <<<'EOF'
 <?php
 
 // This file has been auto-generated by the Symfony Cache Component.
 
-return array(array(
+return [[
 
 
 EOF;
@@ -106,7 +106,7 @@ EOF;
             $dump .= var_export($key, true)." => {$id},\n";
         }
 
-        $dump .= "\n), array(\n\n{$dumpedValues}\n));\n";
+        $dump .= "\n], [\n\n{$dumpedValues}\n]];\n";
 
         $tmpFile = uniqid($this->file, true);
 
@@ -124,7 +124,7 @@ EOF;
      */
     public function clear()
     {
-        $this->keys = $this->values = array();
+        $this->keys = $this->values = [];
 
         $cleared = @unlink($this->file) || !file_exists($this->file);
 
@@ -137,14 +137,14 @@ EOF;
     private function initialize()
     {
         if (!file_exists($this->file)) {
-            $this->keys = $this->values = array();
+            $this->keys = $this->values = [];
 
             return;
         }
-        $values = (include $this->file) ?: array(array(), array());
+        $values = (include $this->file) ?: [[], []];
 
         if (2 !== \count($values) || !isset($values[0], $values[1])) {
-            $this->keys = $this->values = array();
+            $this->keys = $this->values = [];
         } else {
             list($this->keys, $this->values) = $values;
         }
diff --git a/src/Symfony/Component/Cache/Traits/PhpFilesTrait.php b/src/Symfony/Component/Cache/Traits/PhpFilesTrait.php
index 636ad3d99b..b57addb54f 100644
--- a/src/Symfony/Component/Cache/Traits/PhpFilesTrait.php
+++ b/src/Symfony/Component/Cache/Traits/PhpFilesTrait.php
@@ -31,8 +31,8 @@ trait PhpFilesTrait
 
     private $includeHandler;
     private $appendOnly;
-    private $values = array();
-    private $files = array();
+    private $values = [];
+    private $files = [];
 
     private static $startTime;
 
@@ -78,13 +78,13 @@ trait PhpFilesTrait
     {
         if ($this->appendOnly) {
             $now = 0;
-            $missingIds = array();
+            $missingIds = [];
         } else {
             $now = time();
             $missingIds = $ids;
-            $ids = array();
+            $ids = [];
         }
-        $values = array();
+        $values = [];
 
         begin:
         foreach ($ids as $id) {
@@ -124,7 +124,7 @@ trait PhpFilesTrait
         }
 
         $ids = $missingIds;
-        $missingIds = array();
+        $missingIds = [];
         goto begin;
     }
 
@@ -195,7 +195,7 @@ trait PhpFilesTrait
 
             $file = $this->files[$key] = $this->getFile($key, true);
             // Since OPcache only compiles files older than the script execution start, set the file's mtime in the past
-            $ok = $this->write($file, "<?php return array({$expiry}, {$value});\n", self::$startTime - 10) && $ok;
+            $ok = $this->write($file, "<?php return [{$expiry}, {$value}];\n", self::$startTime - 10) && $ok;
 
             if ($allowCompile) {
                 @opcache_invalidate($file, true);
@@ -215,7 +215,7 @@ trait PhpFilesTrait
      */
     protected function doClear($namespace)
     {
-        $this->values = array();
+        $this->values = [];
 
         return $this->doCommonClear($namespace);
     }
diff --git a/src/Symfony/Component/Cache/Traits/RedisTrait.php b/src/Symfony/Component/Cache/Traits/RedisTrait.php
index a7224d216f..43dbb43639 100644
--- a/src/Symfony/Component/Cache/Traits/RedisTrait.php
+++ b/src/Symfony/Component/Cache/Traits/RedisTrait.php
@@ -27,7 +27,7 @@ use Symfony\Component\Cache\Marshaller\MarshallerInterface;
  */
 trait RedisTrait
 {
-    private static $defaultConnectionOptions = array(
+    private static $defaultConnectionOptions = [
         'class' => null,
         'persistent' => 0,
         'persistent_id' => null,
@@ -40,7 +40,7 @@ trait RedisTrait
         'redis_cluster' => false,
         'dbindex' => 0,
         'failover' => 'none',
-    );
+    ];
     private $redis;
     private $marshaller;
 
@@ -78,7 +78,7 @@ trait RedisTrait
      *
      * @return \Redis|\RedisCluster|\Predis\Client According to the "class" option
      */
-    public static function createConnection($dsn, array $options = array())
+    public static function createConnection($dsn, array $options = [])
     {
         if (0 !== strpos($dsn, 'redis:')) {
             throw new InvalidArgumentException(sprintf('Invalid Redis DSN: %s does not start with "redis:".', $dsn));
@@ -100,7 +100,7 @@ trait RedisTrait
             throw new InvalidArgumentException(sprintf('Invalid Redis DSN: %s', $dsn));
         }
 
-        $query = $hosts = array();
+        $query = $hosts = [];
 
         if (isset($params['query'])) {
             parse_str($params['query'], $query);
@@ -114,11 +114,11 @@ trait RedisTrait
                         parse_str($parameters, $parameters);
                     }
                     if (false === $i = strrpos($host, ':')) {
-                        $hosts[$host] = array('scheme' => 'tcp', 'host' => $host, 'port' => 6379) + $parameters;
+                        $hosts[$host] = ['scheme' => 'tcp', 'host' => $host, 'port' => 6379] + $parameters;
                     } elseif ($port = (int) substr($host, 1 + $i)) {
-                        $hosts[$host] = array('scheme' => 'tcp', 'host' => substr($host, 0, $i), 'port' => $port) + $parameters;
+                        $hosts[$host] = ['scheme' => 'tcp', 'host' => substr($host, 0, $i), 'port' => $port] + $parameters;
                     } else {
-                        $hosts[$host] = array('scheme' => 'unix', 'path' => substr($host, 0, $i)) + $parameters;
+                        $hosts[$host] = ['scheme' => 'unix', 'path' => substr($host, 0, $i)] + $parameters;
                     }
                 }
                 $hosts = array_values($hosts);
@@ -132,9 +132,9 @@ trait RedisTrait
             }
 
             if (isset($params['host'])) {
-                array_unshift($hosts, array('scheme' => 'tcp', 'host' => $params['host'], 'port' => $params['port'] ?? 6379));
+                array_unshift($hosts, ['scheme' => 'tcp', 'host' => $params['host'], 'port' => $params['port'] ?? 6379]);
             } else {
-                array_unshift($hosts, array('scheme' => 'unix', 'path' => $params['path']));
+                array_unshift($hosts, ['scheme' => 'unix', 'path' => $params['path']]);
             }
         }
 
@@ -243,13 +243,13 @@ trait RedisTrait
             if ($params['redis_cluster']) {
                 $params['cluster'] = 'redis';
             }
-            $params += array('parameters' => array());
-            $params['parameters'] += array(
+            $params += ['parameters' => []];
+            $params['parameters'] += [
                 'persistent' => $params['persistent'],
                 'timeout' => $params['timeout'],
                 'read_write_timeout' => $params['read_timeout'],
                 'tcp_nodelay' => true,
-            );
+            ];
             if ($params['dbindex']) {
                 $params['parameters']['database'] = $params['dbindex'];
             }
@@ -258,9 +258,9 @@ trait RedisTrait
             }
             if (1 === \count($hosts) && !$params['redis_cluster']) {
                 $hosts = $hosts[0];
-            } elseif (\in_array($params['failover'], array('slaves', 'distribute'), true) && !isset($params['replication'])) {
+            } elseif (\in_array($params['failover'], ['slaves', 'distribute'], true) && !isset($params['replication'])) {
                 $params['replication'] = true;
-                $hosts[0] += array('alias' => 'master');
+                $hosts[0] += ['alias' => 'master'];
             }
 
             $redis = new $class($hosts, array_diff_key($params, self::$defaultConnectionOptions));
@@ -279,15 +279,15 @@ trait RedisTrait
     protected function doFetch(array $ids)
     {
         if (!$ids) {
-            return array();
+            return [];
         }
 
-        $result = array();
+        $result = [];
 
         if ($this->redis instanceof \Predis\Client) {
             $values = $this->pipeline(function () use ($ids) {
                 foreach ($ids as $id) {
-                    yield 'get' => array($id);
+                    yield 'get' => [$id];
                 }
             });
         } else {
@@ -317,26 +317,26 @@ trait RedisTrait
     protected function doClear($namespace)
     {
         $cleared = true;
-        $hosts = array($this->redis);
-        $evalArgs = array(array($namespace), 0);
+        $hosts = [$this->redis];
+        $evalArgs = [[$namespace], 0];
 
         if ($this->redis instanceof \Predis\Client) {
-            $evalArgs = array(0, $namespace);
+            $evalArgs = [0, $namespace];
 
             $connection = $this->redis->getConnection();
             if ($connection instanceof ClusterInterface && $connection instanceof \Traversable) {
-                $hosts = array();
+                $hosts = [];
                 foreach ($connection as $c) {
                     $hosts[] = new \Predis\Client($c);
                 }
             }
         } elseif ($this->redis instanceof \RedisArray) {
-            $hosts = array();
+            $hosts = [];
             foreach ($this->redis->_hosts() as $host) {
                 $hosts[] = $this->redis->_instance($host);
             }
         } elseif ($this->redis instanceof RedisClusterProxy || $this->redis instanceof \RedisCluster) {
-            $hosts = array();
+            $hosts = [];
             foreach ($this->redis->_masters() as $host) {
                 $hosts[] = $h = new \Redis();
                 $h->connect($host[0], $host[1]);
@@ -388,7 +388,7 @@ trait RedisTrait
         if ($this->redis instanceof \Predis\Client) {
             $this->pipeline(function () use ($ids) {
                 foreach ($ids as $id) {
-                    yield 'del' => array($id);
+                    yield 'del' => [$id];
                 }
             })->rewind();
         } else {
@@ -410,9 +410,9 @@ trait RedisTrait
         $results = $this->pipeline(function () use ($values, $lifetime) {
             foreach ($values as $id => $value) {
                 if (0 >= $lifetime) {
-                    yield 'set' => array($id, $value);
+                    yield 'set' => [$id, $value];
                 } else {
-                    yield 'setEx' => array($id, $lifetime, $value);
+                    yield 'setEx' => [$id, $lifetime, $value];
                 }
             }
         });
@@ -427,13 +427,13 @@ trait RedisTrait
 
     private function pipeline(\Closure $generator)
     {
-        $ids = array();
+        $ids = [];
 
         if ($this->redis instanceof RedisClusterProxy || $this->redis instanceof \RedisCluster || ($this->redis instanceof \Predis\Client && $this->redis->getConnection() instanceof RedisCluster)) {
             // phpredis & predis don't support pipelining with RedisCluster
             // see https://github.com/phpredis/phpredis/blob/develop/cluster.markdown#pipelining
             // see https://github.com/nrk/predis/issues/267#issuecomment-123781423
-            $results = array();
+            $results = [];
             foreach ($generator() as $command => $args) {
                 $results[] = $this->redis->{$command}(...$args);
                 $ids[] = $args[0];
@@ -446,14 +446,14 @@ trait RedisTrait
                 }
             });
         } elseif ($this->redis instanceof \RedisArray) {
-            $connections = $results = $ids = array();
+            $connections = $results = $ids = [];
             foreach ($generator() as $command => $args) {
                 if (!isset($connections[$h = $this->redis->_target($args[0])])) {
-                    $connections[$h] = array($this->redis->_instance($h), -1);
+                    $connections[$h] = [$this->redis->_instance($h), -1];
                     $connections[$h][0]->multi(\Redis::PIPELINE);
                 }
                 $connections[$h][0]->{$command}(...$args);
-                $results[] = array($h, ++$connections[$h][1]);
+                $results[] = [$h, ++$connections[$h][1]];
                 $ids[] = $args[0];
             }
             foreach ($connections as $h => $c) {
diff --git a/src/Symfony/Component/Config/CHANGELOG.md b/src/Symfony/Component/Config/CHANGELOG.md
index 5b4f60a272..2e3b31e314 100644
--- a/src/Symfony/Component/Config/CHANGELOG.md
+++ b/src/Symfony/Component/Config/CHANGELOG.md
@@ -57,7 +57,7 @@ The edge case of defining just one value for nodes of type Enum is now allowed:
 $rootNode
     ->children()
         ->enumNode('variable')
-            ->values(array('value'))
+            ->values(['value'])
         ->end()
     ->end()
 ;
diff --git a/src/Symfony/Component/Config/ConfigCache.php b/src/Symfony/Component/Config/ConfigCache.php
index 1d00933c83..053059b8ab 100644
--- a/src/Symfony/Component/Config/ConfigCache.php
+++ b/src/Symfony/Component/Config/ConfigCache.php
@@ -35,9 +35,9 @@ class ConfigCache extends ResourceCheckerConfigCache
     {
         $this->debug = $debug;
 
-        $checkers = array();
+        $checkers = [];
         if (true === $this->debug) {
-            $checkers = array(new SelfCheckingResourceChecker());
+            $checkers = [new SelfCheckingResourceChecker()];
         }
 
         parent::__construct($file, $checkers);
diff --git a/src/Symfony/Component/Config/Definition/ArrayNode.php b/src/Symfony/Component/Config/Definition/ArrayNode.php
index e9e71d0695..dd908c999e 100644
--- a/src/Symfony/Component/Config/Definition/ArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/ArrayNode.php
@@ -22,8 +22,8 @@ use Symfony\Component\Config\Definition\Exception\UnsetKeyException;
  */
 class ArrayNode extends BaseNode implements PrototypeNodeInterface
 {
-    protected $xmlRemappings = array();
-    protected $children = array();
+    protected $xmlRemappings = [];
+    protected $children = [];
     protected $allowFalse = false;
     protected $allowNewKeys = true;
     protected $addIfNotSet = false;
@@ -56,7 +56,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
             return $value;
         }
 
-        $normalized = array();
+        $normalized = [];
 
         foreach ($value as $k => $v) {
             if (false !== strpos($k, '-') && false === strpos($k, '_') && !array_key_exists($normalizedKey = str_replace('-', '_', $k), $value)) {
@@ -82,7 +82,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
     /**
      * Sets the xml remappings that should be performed.
      *
-     * @param array $remappings An array of the form array(array(string, string))
+     * @param array $remappings An array of the form [[string, string]]
      */
     public function setXmlRemappings(array $remappings)
     {
@@ -92,7 +92,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
     /**
      * Gets the xml remappings that should be performed.
      *
-     * @return array an array of the form array(array(string, string))
+     * @return array an array of the form [[string, string]]
      */
     public function getXmlRemappings()
     {
@@ -177,7 +177,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
             throw new \RuntimeException(sprintf('The node at path "%s" has no default value.', $this->getPath()));
         }
 
-        $defaults = array();
+        $defaults = [];
         foreach ($this->children as $name => $child) {
             if ($child->hasDefaultValue()) {
                 $defaults[$name] = $child->getDefaultValue();
@@ -289,7 +289,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
 
         $value = $this->remapXml($value);
 
-        $normalized = array();
+        $normalized = [];
         foreach ($value as $name => $val) {
             if (isset($this->children[$name])) {
                 try {
@@ -306,7 +306,7 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
         if (\count($value) && !$this->ignoreExtraKeys) {
             $proposals = array_keys($this->children);
             sort($proposals);
-            $guesses = array();
+            $guesses = [];
 
             foreach (array_keys($value) as $subject) {
                 $minScore = INF;
diff --git a/src/Symfony/Component/Config/Definition/BaseNode.php b/src/Symfony/Component/Config/Definition/BaseNode.php
index 16dfccb54c..39511c15c6 100644
--- a/src/Symfony/Component/Config/Definition/BaseNode.php
+++ b/src/Symfony/Component/Config/Definition/BaseNode.php
@@ -27,17 +27,17 @@ abstract class BaseNode implements NodeInterface
     const DEFAULT_PATH_SEPARATOR = '.';
 
     private static $placeholderUniquePrefix;
-    private static $placeholders = array();
+    private static $placeholders = [];
 
     protected $name;
     protected $parent;
-    protected $normalizationClosures = array();
-    protected $finalValidationClosures = array();
+    protected $normalizationClosures = [];
+    protected $finalValidationClosures = [];
     protected $allowOverwrite = true;
     protected $required = false;
     protected $deprecationMessage = null;
-    protected $equivalentValues = array();
-    protected $attributes = array();
+    protected $equivalentValues = [];
+    protected $attributes = [];
     protected $pathSeparator;
 
     private $handlingPlaceholder;
@@ -94,7 +94,7 @@ abstract class BaseNode implements NodeInterface
     public static function resetPlaceholders(): void
     {
         self::$placeholderUniquePrefix = null;
-        self::$placeholders = array();
+        self::$placeholders = [];
     }
 
     public function setAttribute($key, $value)
@@ -175,7 +175,7 @@ abstract class BaseNode implements NodeInterface
      */
     public function addEquivalentValue($originalValue, $equivalentValue)
     {
-        $this->equivalentValues[] = array($originalValue, $equivalentValue);
+        $this->equivalentValues[] = [$originalValue, $equivalentValue];
     }
 
     /**
@@ -259,7 +259,7 @@ abstract class BaseNode implements NodeInterface
      */
     public function getDeprecationMessage($node, $path)
     {
-        return strtr($this->deprecationMessage, array('%node%' => $node, '%path%' => $path));
+        return strtr($this->deprecationMessage, ['%node%' => $node, '%path%' => $path]);
     }
 
     /**
@@ -484,7 +484,7 @@ abstract class BaseNode implements NodeInterface
      */
     protected function getValidPlaceholderTypes(): array
     {
-        return array();
+        return [];
     }
 
     private static function resolvePlaceholderValue($value)
@@ -495,7 +495,7 @@ abstract class BaseNode implements NodeInterface
             }
 
             if (self::$placeholderUniquePrefix && 0 === strpos($value, self::$placeholderUniquePrefix)) {
-                return array();
+                return [];
             }
         }
 
diff --git a/src/Symfony/Component/Config/Definition/BooleanNode.php b/src/Symfony/Component/Config/Definition/BooleanNode.php
index 40f693915a..c43c46f016 100644
--- a/src/Symfony/Component/Config/Definition/BooleanNode.php
+++ b/src/Symfony/Component/Config/Definition/BooleanNode.php
@@ -50,6 +50,6 @@ class BooleanNode extends ScalarNode
      */
     protected function getValidPlaceholderTypes(): array
     {
-        return array('bool');
+        return ['bool'];
     }
 }
diff --git a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
index b82f1445c2..43c2b8b731 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
@@ -25,7 +25,7 @@ class ArrayNodeDefinition extends NodeDefinition implements ParentNodeDefinition
     protected $performDeepMerging = true;
     protected $ignoreExtraKeys = false;
     protected $removeExtraKeys = true;
-    protected $children = array();
+    protected $children = [];
     protected $prototype;
     protected $atLeastOne = false;
     protected $allowNewKeys = true;
@@ -43,8 +43,8 @@ class ArrayNodeDefinition extends NodeDefinition implements ParentNodeDefinition
     {
         parent::__construct($name, $parent);
 
-        $this->nullEquivalent = array();
-        $this->trueEquivalent = array();
+        $this->nullEquivalent = [];
+        $this->trueEquivalent = [];
     }
 
     /**
@@ -214,15 +214,15 @@ class ArrayNodeDefinition extends NodeDefinition implements ParentNodeDefinition
      * to be the key of the particular item. For example, if "id" is the
      * "key", then:
      *
-     *     array(
-     *         array('id' => 'my_name', 'foo' => 'bar'),
-     *     );
+     *     [
+     *         ['id' => 'my_name', 'foo' => 'bar'],
+     *     ];
      *
      *   becomes
      *
-     *     array(
-     *         'my_name' => array('foo' => 'bar'),
-     *     );
+     *     [
+     *         'my_name' => ['foo' => 'bar'],
+     *     ];
      *
      * If you'd like "'id' => 'my_name'" to still be present in the resulting
      * array, then you can set the second argument of this method to false.
@@ -275,9 +275,9 @@ class ArrayNodeDefinition extends NodeDefinition implements ParentNodeDefinition
     {
         $this
             ->addDefaultsIfNotSet()
-            ->treatFalseLike(array('enabled' => false))
-            ->treatTrueLike(array('enabled' => true))
-            ->treatNullLike(array('enabled' => true))
+            ->treatFalseLike(['enabled' => false])
+            ->treatTrueLike(['enabled' => true])
+            ->treatNullLike(['enabled' => true])
             ->beforeNormalization()
                 ->ifArray()
                 ->then(function ($v) {
@@ -305,9 +305,9 @@ class ArrayNodeDefinition extends NodeDefinition implements ParentNodeDefinition
     {
         $this
             ->addDefaultsIfNotSet()
-            ->treatFalseLike(array('enabled' => false))
-            ->treatTrueLike(array('enabled' => true))
-            ->treatNullLike(array('enabled' => true))
+            ->treatFalseLike(['enabled' => false])
+            ->treatTrueLike(['enabled' => true])
+            ->treatNullLike(['enabled' => true])
             ->children()
                 ->booleanNode('enabled')
                     ->defaultTrue()
diff --git a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
index 7ba19515b8..05949d2b5a 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
@@ -144,7 +144,7 @@ class ExprBuilder
     public function castToArray()
     {
         $this->ifPart = function ($v) { return !\is_array($v); };
-        $this->thenPart = function ($v) { return array($v); };
+        $this->thenPart = function ($v) { return [$v]; };
 
         return $this;
     }
@@ -168,7 +168,7 @@ class ExprBuilder
      */
     public function thenEmptyArray()
     {
-        $this->thenPart = function ($v) { return array(); };
+        $this->thenPart = function ($v) { return []; };
 
         return $this;
     }
diff --git a/src/Symfony/Component/Config/Definition/Builder/NodeBuilder.php b/src/Symfony/Component/Config/Definition/Builder/NodeBuilder.php
index 7d33404ad2..84ad86794c 100644
--- a/src/Symfony/Component/Config/Definition/Builder/NodeBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/NodeBuilder.php
@@ -23,7 +23,7 @@ class NodeBuilder implements NodeParentInterface
 
     public function __construct()
     {
-        $this->nodeMapping = array(
+        $this->nodeMapping = [
             'variable' => __NAMESPACE__.'\\VariableNodeDefinition',
             'scalar' => __NAMESPACE__.'\\ScalarNodeDefinition',
             'boolean' => __NAMESPACE__.'\\BooleanNodeDefinition',
@@ -31,7 +31,7 @@ class NodeBuilder implements NodeParentInterface
             'float' => __NAMESPACE__.'\\FloatNodeDefinition',
             'array' => __NAMESPACE__.'\\ArrayNodeDefinition',
             'enum' => __NAMESPACE__.'\\EnumNodeDefinition',
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
index 2456ed9908..a771a43cd2 100644
--- a/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
@@ -36,7 +36,7 @@ abstract class NodeDefinition implements NodeParentInterface
     protected $falseEquivalent = false;
     protected $pathSeparator = BaseNode::DEFAULT_PATH_SEPARATOR;
     protected $parent;
-    protected $attributes = array();
+    protected $attributes = [];
 
     public function __construct(?string $name, NodeParentInterface $parent = null)
     {
diff --git a/src/Symfony/Component/Config/Definition/Builder/NormalizationBuilder.php b/src/Symfony/Component/Config/Definition/Builder/NormalizationBuilder.php
index 35e30487a6..d3cdca90df 100644
--- a/src/Symfony/Component/Config/Definition/Builder/NormalizationBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/NormalizationBuilder.php
@@ -19,8 +19,8 @@ namespace Symfony\Component\Config\Definition\Builder;
 class NormalizationBuilder
 {
     protected $node;
-    public $before = array();
-    public $remappings = array();
+    public $before = [];
+    public $remappings = [];
 
     public function __construct(NodeDefinition $node)
     {
@@ -37,7 +37,7 @@ class NormalizationBuilder
      */
     public function remap($key, $plural = null)
     {
-        $this->remappings[] = array($key, null === $plural ? $key.'s' : $plural);
+        $this->remappings[] = [$key, null === $plural ? $key.'s' : $plural];
 
         return $this;
     }
diff --git a/src/Symfony/Component/Config/Definition/Builder/ValidationBuilder.php b/src/Symfony/Component/Config/Definition/Builder/ValidationBuilder.php
index bb2b9eb339..4efc726c0c 100644
--- a/src/Symfony/Component/Config/Definition/Builder/ValidationBuilder.php
+++ b/src/Symfony/Component/Config/Definition/Builder/ValidationBuilder.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\Config\Definition\Builder;
 class ValidationBuilder
 {
     protected $node;
-    public $rules = array();
+    public $rules = [];
 
     public function __construct(NodeDefinition $node)
     {
diff --git a/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php b/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
index bea15e3ab9..7276b55a89 100644
--- a/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
+++ b/src/Symfony/Component/Config/Definition/Dumper/XmlReferenceDumper.php
@@ -59,10 +59,10 @@ class XmlReferenceDumper
         }
         $rootName = str_replace('_', '-', $rootName);
 
-        $rootAttributes = array();
-        $rootAttributeComments = array();
-        $rootChildren = array();
-        $rootComments = array();
+        $rootAttributes = [];
+        $rootAttributeComments = [];
+        $rootChildren = [];
+        $rootComments = [];
 
         if ($node instanceof ArrayNode) {
             $children = $node->getChildren();
@@ -92,7 +92,7 @@ class XmlReferenceDumper
 
                 if ($prototype instanceof PrototypedArrayNode) {
                     $prototype->setName($key);
-                    $children = array($key => $prototype);
+                    $children = [$key => $prototype];
                 } elseif ($prototype instanceof ArrayNode) {
                     $children = $prototype->getChildren();
                 } else {
@@ -134,7 +134,7 @@ class XmlReferenceDumper
                     $value = '%%%%not_defined%%%%'; // use a string which isn't used in the normal world
 
                     // comments
-                    $comments = array();
+                    $comments = [];
                     if ($info = $child->getInfo()) {
                         $comments[] = $info;
                     }
diff --git a/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php b/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
index b75a63d166..c97d23f198 100644
--- a/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
+++ b/src/Symfony/Component/Config/Definition/Dumper/YamlReferenceDumper.php
@@ -71,7 +71,7 @@ class YamlReferenceDumper
 
     private function writeNode(NodeInterface $node, NodeInterface $parentNode = null, int $depth = 0, bool $prototypedArray = false)
     {
-        $comments = array();
+        $comments = [];
         $default = '';
         $defaultArray = null;
         $children = null;
@@ -237,6 +237,6 @@ class YamlReferenceDumper
         }
         $keyNode->setInfo($info);
 
-        return array($key => $keyNode);
+        return [$key => $keyNode];
     }
 }
diff --git a/src/Symfony/Component/Config/Definition/EnumNode.php b/src/Symfony/Component/Config/Definition/EnumNode.php
index c54117a34a..23fc508a78 100644
--- a/src/Symfony/Component/Config/Definition/EnumNode.php
+++ b/src/Symfony/Component/Config/Definition/EnumNode.php
@@ -22,7 +22,7 @@ class EnumNode extends ScalarNode
 {
     private $values;
 
-    public function __construct(?string $name, NodeInterface $parent = null, array $values = array(), string $pathSeparator = BaseNode::DEFAULT_PATH_SEPARATOR)
+    public function __construct(?string $name, NodeInterface $parent = null, array $values = [], string $pathSeparator = BaseNode::DEFAULT_PATH_SEPARATOR)
     {
         $values = array_unique($values);
         if (empty($values)) {
diff --git a/src/Symfony/Component/Config/Definition/FloatNode.php b/src/Symfony/Component/Config/Definition/FloatNode.php
index 173b76df38..8e229ed4c5 100644
--- a/src/Symfony/Component/Config/Definition/FloatNode.php
+++ b/src/Symfony/Component/Config/Definition/FloatNode.php
@@ -46,6 +46,6 @@ class FloatNode extends NumericNode
      */
     protected function getValidPlaceholderTypes(): array
     {
-        return array('float');
+        return ['float'];
     }
 }
diff --git a/src/Symfony/Component/Config/Definition/IntegerNode.php b/src/Symfony/Component/Config/Definition/IntegerNode.php
index 4523584986..e8c6a81c30 100644
--- a/src/Symfony/Component/Config/Definition/IntegerNode.php
+++ b/src/Symfony/Component/Config/Definition/IntegerNode.php
@@ -41,6 +41,6 @@ class IntegerNode extends NumericNode
      */
     protected function getValidPlaceholderTypes(): array
     {
-        return array('int');
+        return ['int'];
     }
 }
diff --git a/src/Symfony/Component/Config/Definition/Processor.php b/src/Symfony/Component/Config/Definition/Processor.php
index 4f4c66cadd..b6a3434113 100644
--- a/src/Symfony/Component/Config/Definition/Processor.php
+++ b/src/Symfony/Component/Config/Definition/Processor.php
@@ -30,7 +30,7 @@ class Processor
      */
     public function process(NodeInterface $configTree, array $configs)
     {
-        $currentConfig = array();
+        $currentConfig = [];
         foreach ($configs as $config) {
             $config = $configTree->normalize($config);
             $currentConfig = $configTree->merge($currentConfig, $config);
@@ -88,12 +88,12 @@ class Processor
         if (isset($config[$key])) {
             if (\is_string($config[$key]) || !\is_int(key($config[$key]))) {
                 // only one
-                return  array($config[$key]);
+                return  [$config[$key]];
             }
 
             return  $config[$key];
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php b/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
index 4017b9d67c..4a3446f52f 100644
--- a/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/PrototypedArrayNode.php
@@ -27,12 +27,12 @@ class PrototypedArrayNode extends ArrayNode
     protected $keyAttribute;
     protected $removeKeyAttribute = false;
     protected $minNumberOfElements = 0;
-    protected $defaultValue = array();
+    protected $defaultValue = [];
     protected $defaultChildren;
     /**
      * @var NodeInterface[] An array of the prototypes of the simplified value children
      */
-    private $valuePrototypes = array();
+    private $valuePrototypes = [];
 
     /**
      * Sets the minimum number of elements that a prototype based node must
@@ -53,15 +53,15 @@ class PrototypedArrayNode extends ArrayNode
      * to be the key of the particular item. For example, if "id" is the
      * "key", then:
      *
-     *     array(
-     *         array('id' => 'my_name', 'foo' => 'bar'),
-     *     );
+     *     [
+     *         ['id' => 'my_name', 'foo' => 'bar'],
+     *     ];
      *
      *  becomes
      *
-     *      array(
-     *          'my_name' => array('foo' => 'bar'),
-     *      );
+     *      [
+     *          'my_name' => ['foo' => 'bar'],
+     *      ];
      *
      * If you'd like "'id' => 'my_name'" to still be present in the resulting
      * array, then you can set the second argument of this method to false.
@@ -114,10 +114,10 @@ class PrototypedArrayNode extends ArrayNode
      *
      * @param int|string|array|null $children The number of children|The child name|The children names to be added
      */
-    public function setAddChildrenIfNoneSet($children = array('defaults'))
+    public function setAddChildrenIfNoneSet($children = ['defaults'])
     {
         if (null === $children) {
-            $this->defaultChildren = array('defaults');
+            $this->defaultChildren = ['defaults'];
         } else {
             $this->defaultChildren = \is_int($children) && $children > 0 ? range(1, $children) : (array) $children;
         }
@@ -132,8 +132,8 @@ class PrototypedArrayNode extends ArrayNode
     public function getDefaultValue()
     {
         if (null !== $this->defaultChildren) {
-            $default = $this->prototype->hasDefaultValue() ? $this->prototype->getDefaultValue() : array();
-            $defaults = array();
+            $default = $this->prototype->hasDefaultValue() ? $this->prototype->getDefaultValue() : [];
+            $defaults = [];
             foreach (array_values($this->defaultChildren) as $i => $name) {
                 $defaults[null === $this->keyAttribute ? $i : $name] = $default;
             }
@@ -226,7 +226,7 @@ class PrototypedArrayNode extends ArrayNode
         $value = $this->remapXml($value);
 
         $isAssoc = array_keys($value) !== range(0, \count($value) - 1);
-        $normalized = array();
+        $normalized = [];
         foreach ($value as $k => $v) {
             if (null !== $this->keyAttribute && \is_array($v)) {
                 if (!isset($v[$this->keyAttribute]) && \is_int($k) && !$isAssoc) {
@@ -243,7 +243,7 @@ class PrototypedArrayNode extends ArrayNode
                     }
 
                     // if only "value" is left
-                    if (array_keys($v) === array('value')) {
+                    if (array_keys($v) === ['value']) {
                         $v = $v['value'];
                         if ($this->prototype instanceof ArrayNode && ($children = $this->prototype->getChildren()) && array_key_exists('value', $children)) {
                             $valuePrototype = current($this->valuePrototypes) ?: clone $children['value'];
@@ -335,30 +335,30 @@ class PrototypedArrayNode extends ArrayNode
      *
      * For example, assume $this->keyAttribute is 'name' and the value array is as follows:
      *
-     *     array(
-     *         array(
+     *     [
+     *         [
      *             'name' => 'name001',
      *             'value' => 'value001'
-     *         )
-     *     )
+     *         ]
+     *     ]
      *
      * Now, the key is 0 and the child node is:
      *
-     *     array(
+     *     [
      *        'name' => 'name001',
      *        'value' => 'value001'
-     *     )
+     *     ]
      *
      * When normalizing the value array, the 'name' element will removed from the child node
      * and its value becomes the new key of the child node:
      *
-     *     array(
-     *         'name001' => array('value' => 'value001')
-     *     )
+     *     [
+     *         'name001' => ['value' => 'value001']
+     *     ]
      *
      * Now only 'value' element is left in the child node which can be further simplified into a string:
      *
-     *     array('name001' => 'value001')
+     *     ['name001' => 'value001']
      *
      * Now, the key becomes 'name001' and the child node becomes 'value001' and
      * the prototype of child node 'name001' should be a ScalarNode instead of an ArrayNode instance.
diff --git a/src/Symfony/Component/Config/Definition/ScalarNode.php b/src/Symfony/Component/Config/Definition/ScalarNode.php
index 77503bfd6e..5ad28ec4c5 100644
--- a/src/Symfony/Component/Config/Definition/ScalarNode.php
+++ b/src/Symfony/Component/Config/Definition/ScalarNode.php
@@ -62,6 +62,6 @@ class ScalarNode extends VariableNode
      */
     protected function getValidPlaceholderTypes(): array
     {
-        return array('bool', 'int', 'float', 'string');
+        return ['bool', 'int', 'float', 'string'];
     }
 }
diff --git a/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php b/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
index 89b60fc296..45e73e3ce8 100644
--- a/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
+++ b/src/Symfony/Component/Config/Exception/FileLoaderLoadException.php
@@ -82,7 +82,7 @@ class FileLoaderLoadException extends \Exception
         }
 
         if (\is_array($var)) {
-            $a = array();
+            $a = [];
             foreach ($var as $k => $v) {
                 $a[] = sprintf('%s => %s', $k, $this->varToString($v));
             }
diff --git a/src/Symfony/Component/Config/Exception/FileLocatorFileNotFoundException.php b/src/Symfony/Component/Config/Exception/FileLocatorFileNotFoundException.php
index 09b7160673..d8dad76a0a 100644
--- a/src/Symfony/Component/Config/Exception/FileLocatorFileNotFoundException.php
+++ b/src/Symfony/Component/Config/Exception/FileLocatorFileNotFoundException.php
@@ -20,7 +20,7 @@ class FileLocatorFileNotFoundException extends \InvalidArgumentException
 {
     private $paths;
 
-    public function __construct(string $message = '', int $code = 0, \Exception $previous = null, array $paths = array())
+    public function __construct(string $message = '', int $code = 0, \Exception $previous = null, array $paths = [])
     {
         parent::__construct($message, $code, $previous);
 
diff --git a/src/Symfony/Component/Config/FileLocator.php b/src/Symfony/Component/Config/FileLocator.php
index 2b61db6d76..b80026ea07 100644
--- a/src/Symfony/Component/Config/FileLocator.php
+++ b/src/Symfony/Component/Config/FileLocator.php
@@ -25,7 +25,7 @@ class FileLocator implements FileLocatorInterface
     /**
      * @param string|string[] $paths A path or an array of paths where to look for resources
      */
-    public function __construct($paths = array())
+    public function __construct($paths = [])
     {
         $this->paths = (array) $paths;
     }
@@ -41,7 +41,7 @@ class FileLocator implements FileLocatorInterface
 
         if ($this->isAbsolutePath($name)) {
             if (!file_exists($name)) {
-                throw new FileLocatorFileNotFoundException(sprintf('The file "%s" does not exist.', $name), 0, null, array($name));
+                throw new FileLocatorFileNotFoundException(sprintf('The file "%s" does not exist.', $name), 0, null, [$name]);
             }
 
             return $name;
@@ -54,7 +54,7 @@ class FileLocator implements FileLocatorInterface
         }
 
         $paths = array_unique($paths);
-        $filepaths = $notfound = array();
+        $filepaths = $notfound = [];
 
         foreach ($paths as $path) {
             if (@file_exists($file = $path.\DIRECTORY_SEPARATOR.$name)) {
diff --git a/src/Symfony/Component/Config/Loader/FileLoader.php b/src/Symfony/Component/Config/Loader/FileLoader.php
index f0a9dbd690..ab48492a4b 100644
--- a/src/Symfony/Component/Config/Loader/FileLoader.php
+++ b/src/Symfony/Component/Config/Loader/FileLoader.php
@@ -25,7 +25,7 @@ use Symfony\Component\Config\Resource\GlobResource;
  */
 abstract class FileLoader extends Loader
 {
-    protected static $loading = array();
+    protected static $loading = [];
 
     protected $locator;
 
@@ -73,7 +73,7 @@ abstract class FileLoader extends Loader
     public function import($resource, $type = null, $ignoreErrors = false, $sourceResource = null)
     {
         if (\is_string($resource) && \strlen($resource) !== $i = strcspn($resource, '*?{[')) {
-            $ret = array();
+            $ret = [];
             $isSubpath = 0 !== $i && false !== strpos(substr($resource, 0, $i), '/');
             foreach ($this->glob($resource, false, $_, $ignoreErrors || !$isSubpath) as $path => $info) {
                 if (null !== $res = $this->doImport($path, $type, $ignoreErrors, $sourceResource)) {
@@ -93,7 +93,7 @@ abstract class FileLoader extends Loader
     /**
      * @internal
      */
-    protected function glob(string $pattern, bool $recursive, &$resource = null, bool $ignoreErrors = false, bool $forExclusion = false, array $excluded = array())
+    protected function glob(string $pattern, bool $recursive, &$resource = null, bool $ignoreErrors = false, bool $forExclusion = false, array $excluded = [])
     {
         if (\strlen($pattern) === $i = strcspn($pattern, '*?{[')) {
             $prefix = $pattern;
@@ -113,7 +113,7 @@ abstract class FileLoader extends Loader
                 throw $e;
             }
 
-            $resource = array();
+            $resource = [];
             foreach ($e->getPaths() as $path) {
                 $resource[] = new FileExistenceResource($path);
             }
@@ -134,7 +134,7 @@ abstract class FileLoader extends Loader
                 $resource = $loader->getLocator()->locate($resource, $this->currentDir, false);
             }
 
-            $resources = \is_array($resource) ? $resource : array($resource);
+            $resources = \is_array($resource) ? $resource : [$resource];
             for ($i = 0; $i < $resourcesCount = \count($resources); ++$i) {
                 if (isset(self::$loading[$resources[$i]])) {
                     if ($i == $resourcesCount - 1) {
diff --git a/src/Symfony/Component/Config/Loader/LoaderResolver.php b/src/Symfony/Component/Config/Loader/LoaderResolver.php
index 9299bc000f..c99efda4fd 100644
--- a/src/Symfony/Component/Config/Loader/LoaderResolver.php
+++ b/src/Symfony/Component/Config/Loader/LoaderResolver.php
@@ -24,12 +24,12 @@ class LoaderResolver implements LoaderResolverInterface
     /**
      * @var LoaderInterface[] An array of LoaderInterface objects
      */
-    private $loaders = array();
+    private $loaders = [];
 
     /**
      * @param LoaderInterface[] $loaders An array of loaders
      */
-    public function __construct(array $loaders = array())
+    public function __construct(array $loaders = [])
     {
         foreach ($loaders as $loader) {
             $this->addLoader($loader);
diff --git a/src/Symfony/Component/Config/Resource/ClassExistenceResource.php b/src/Symfony/Component/Config/Resource/ClassExistenceResource.php
index 800e14c7ff..696c1de9b0 100644
--- a/src/Symfony/Component/Config/Resource/ClassExistenceResource.php
+++ b/src/Symfony/Component/Config/Resource/ClassExistenceResource.php
@@ -26,7 +26,7 @@ class ClassExistenceResource implements SelfCheckingResourceInterface, \Serializ
 
     private static $autoloadLevel = 0;
     private static $autoloadedClass;
-    private static $existsCache = array();
+    private static $existsCache = [];
 
     /**
      * @param string    $resource The fully-qualified class name
@@ -103,7 +103,7 @@ class ClassExistenceResource implements SelfCheckingResourceInterface, \Serializ
             $this->isFresh(0);
         }
 
-        return serialize(array($this->resource, $this->exists));
+        return serialize([$this->resource, $this->exists]);
     }
 
     /**
@@ -124,10 +124,10 @@ class ClassExistenceResource implements SelfCheckingResourceInterface, \Serializ
         }
         $e = new \ReflectionException("Class $class not found");
         $trace = $e->getTrace();
-        $autoloadFrame = array(
+        $autoloadFrame = [
             'function' => 'spl_autoload_call',
-            'args' => array($class),
-        );
+            'args' => [$class],
+        ];
         $i = 1 + array_search($autoloadFrame, $trace, true);
 
         if (isset($trace[$i]['function']) && !isset($trace[$i]['class'])) {
@@ -149,11 +149,11 @@ class ClassExistenceResource implements SelfCheckingResourceInterface, \Serializ
                     return;
             }
 
-            $props = array(
+            $props = [
                 'file' => $trace[$i]['file'],
                 'line' => $trace[$i]['line'],
                 'trace' => \array_slice($trace, 1 + $i),
-            );
+            ];
 
             foreach ($props as $p => $v) {
                 $r = new \ReflectionProperty('Exception', $p);
diff --git a/src/Symfony/Component/Config/Resource/ComposerResource.php b/src/Symfony/Component/Config/Resource/ComposerResource.php
index 9c170c0775..85ac555295 100644
--- a/src/Symfony/Component/Config/Resource/ComposerResource.php
+++ b/src/Symfony/Component/Config/Resource/ComposerResource.php
@@ -63,7 +63,7 @@ class ComposerResource implements SelfCheckingResourceInterface, \Serializable
 
     private static function refresh()
     {
-        self::$runtimeVendors = array();
+        self::$runtimeVendors = [];
 
         foreach (get_declared_classes() as $class) {
             if ('C' === $class[0] && 0 === strpos($class, 'ComposerAutoloaderInit')) {
diff --git a/src/Symfony/Component/Config/Resource/DirectoryResource.php b/src/Symfony/Component/Config/Resource/DirectoryResource.php
index b6d1f9a24a..f8d5bff89e 100644
--- a/src/Symfony/Component/Config/Resource/DirectoryResource.php
+++ b/src/Symfony/Component/Config/Resource/DirectoryResource.php
@@ -42,7 +42,7 @@ class DirectoryResource implements SelfCheckingResourceInterface, \Serializable
      */
     public function __toString()
     {
-        return md5(serialize(array($this->resource, $this->pattern)));
+        return md5(serialize([$this->resource, $this->pattern]));
     }
 
     /**
@@ -106,7 +106,7 @@ class DirectoryResource implements SelfCheckingResourceInterface, \Serializable
 
     public function serialize()
     {
-        return serialize(array($this->resource, $this->pattern));
+        return serialize([$this->resource, $this->pattern]);
     }
 
     public function unserialize($serialized)
diff --git a/src/Symfony/Component/Config/Resource/FileExistenceResource.php b/src/Symfony/Component/Config/Resource/FileExistenceResource.php
index a4eb8f3544..e1b7544505 100644
--- a/src/Symfony/Component/Config/Resource/FileExistenceResource.php
+++ b/src/Symfony/Component/Config/Resource/FileExistenceResource.php
@@ -63,7 +63,7 @@ class FileExistenceResource implements SelfCheckingResourceInterface, \Serializa
      */
     public function serialize()
     {
-        return serialize(array($this->resource, $this->exists));
+        return serialize([$this->resource, $this->exists]);
     }
 
     /**
diff --git a/src/Symfony/Component/Config/Resource/GlobResource.php b/src/Symfony/Component/Config/Resource/GlobResource.php
index bd110d72f5..195a8e5eec 100644
--- a/src/Symfony/Component/Config/Resource/GlobResource.php
+++ b/src/Symfony/Component/Config/Resource/GlobResource.php
@@ -37,7 +37,7 @@ class GlobResource implements \IteratorAggregate, SelfCheckingResourceInterface,
      *
      * @throws \InvalidArgumentException
      */
-    public function __construct(?string $prefix, string $pattern, bool $recursive, bool $forExclusion = false, array $excludedPrefixes = array())
+    public function __construct(?string $prefix, string $pattern, bool $recursive, bool $forExclusion = false, array $excludedPrefixes = [])
     {
         $this->prefix = realpath($prefix) ?: (file_exists($prefix) ? $prefix : false);
         $this->pattern = $pattern;
@@ -83,12 +83,12 @@ class GlobResource implements \IteratorAggregate, SelfCheckingResourceInterface,
             $this->hash = $this->computeHash();
         }
 
-        return serialize(array($this->prefix, $this->pattern, $this->recursive, $this->hash, $this->forExclusion, $this->excludedPrefixes));
+        return serialize([$this->prefix, $this->pattern, $this->recursive, $this->hash, $this->forExclusion, $this->excludedPrefixes]);
     }
 
     public function unserialize($serialized)
     {
-        list($this->prefix, $this->pattern, $this->recursive, $this->hash, $this->forExclusion, $this->excludedPrefixes) = unserialize($serialized) + array(4 => false, array());
+        list($this->prefix, $this->pattern, $this->recursive, $this->hash, $this->forExclusion, $this->excludedPrefixes) = unserialize($serialized) + [4 => false, []];
     }
 
     public function getIterator()
diff --git a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
index cddea2dcd2..04a9aafd44 100644
--- a/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
+++ b/src/Symfony/Component/Config/Resource/ReflectionClassResource.php
@@ -20,13 +20,13 @@ use Symfony\Contracts\Service\ServiceSubscriberInterface;
  */
 class ReflectionClassResource implements SelfCheckingResourceInterface, \Serializable
 {
-    private $files = array();
+    private $files = [];
     private $className;
     private $classReflector;
-    private $excludedVendors = array();
+    private $excludedVendors = [];
     private $hash;
 
-    public function __construct(\ReflectionClass $classReflector, array $excludedVendors = array())
+    public function __construct(\ReflectionClass $classReflector, array $excludedVendors = [])
     {
         $this->className = $classReflector->name;
         $this->classReflector = $classReflector;
@@ -65,7 +65,7 @@ class ReflectionClassResource implements SelfCheckingResourceInterface, \Seriali
             $this->loadFiles($this->classReflector);
         }
 
-        return serialize(array($this->files, $this->className, $this->hash));
+        return serialize([$this->files, $this->className, $this->hash]);
     }
 
     public function unserialize($serialized)
@@ -142,7 +142,7 @@ class ReflectionClassResource implements SelfCheckingResourceInterface, \Seriali
         foreach ($class->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) as $m) {
             yield preg_replace('/^  @@.*/m', '', $m);
 
-            $defaults = array();
+            $defaults = [];
             foreach ($m->getParameters() as $p) {
                 $defaults[$p->name] = $p->isDefaultValueAvailable() ? $p->getDefaultValue() : null;
             }
@@ -160,7 +160,7 @@ class ReflectionClassResource implements SelfCheckingResourceInterface, \Seriali
 
         if (interface_exists(LegacyServiceSubscriberInterface::class, false) && $class->isSubclassOf(LegacyServiceSubscriberInterface::class)) {
             yield LegacyServiceSubscriberInterface::class;
-            yield print_r(array($class->name, 'getSubscribedServices')(), true);
+            yield print_r([$class->name, 'getSubscribedServices'](), true);
         } elseif (interface_exists(ServiceSubscriberInterface::class, false) && $class->isSubclassOf(ServiceSubscriberInterface::class)) {
             yield ServiceSubscriberInterface::class;
             yield print_r($class->name::getSubscribedServices(), true);
diff --git a/src/Symfony/Component/Config/ResourceCheckerConfigCache.php b/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
index e7f2edfe96..533ec79c5b 100644
--- a/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
+++ b/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
@@ -37,7 +37,7 @@ class ResourceCheckerConfigCache implements ConfigCacheInterface
      * @param string                              $file             The absolute cache path
      * @param iterable|ResourceCheckerInterface[] $resourceCheckers The ResourceCheckers to use for the freshness check
      */
-    public function __construct(string $file, iterable $resourceCheckers = array())
+    public function __construct(string $file, iterable $resourceCheckers = [])
     {
         $this->file = $file;
         $this->resourceCheckers = $resourceCheckers;
@@ -158,7 +158,7 @@ class ResourceCheckerConfigCache implements ConfigCacheInterface
         $meta = false;
         $signalingException = new \UnexpectedValueException();
         $prevUnserializeHandler = ini_set('unserialize_callback_func', '');
-        $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = array()) use (&$prevErrorHandler, $signalingException) {
+        $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$prevErrorHandler, $signalingException) {
             if (E_WARNING === $type && 'Class __PHP_Incomplete_Class has no unserializer' === $msg) {
                 throw $signalingException;
             }
diff --git a/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php b/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
index 8d94a2921d..0338635ff5 100644
--- a/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
+++ b/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php
@@ -19,12 +19,12 @@ namespace Symfony\Component\Config;
  */
 class ResourceCheckerConfigCacheFactory implements ConfigCacheFactoryInterface
 {
-    private $resourceCheckers = array();
+    private $resourceCheckers = [];
 
     /**
      * @param iterable|ResourceCheckerInterface[] $resourceCheckers
      */
-    public function __construct(iterable $resourceCheckers = array())
+    public function __construct(iterable $resourceCheckers = [])
     {
         $this->resourceCheckers = $resourceCheckers;
     }
diff --git a/src/Symfony/Component/Config/Tests/ConfigCacheTest.php b/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
index bf8131d514..d0b70899b5 100644
--- a/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
+++ b/src/Symfony/Component/Config/Tests/ConfigCacheTest.php
@@ -26,7 +26,7 @@ class ConfigCacheTest extends TestCase
 
     protected function tearDown()
     {
-        $files = array($this->cacheFile, $this->cacheFile.'.meta');
+        $files = [$this->cacheFile, $this->cacheFile.'.meta'];
 
         foreach ($files as $file) {
             if (file_exists($file)) {
@@ -52,7 +52,7 @@ class ConfigCacheTest extends TestCase
         $staleResource->setFresh(false);
 
         $cache = new ConfigCache($this->cacheFile, false);
-        $cache->write('', array($staleResource));
+        $cache->write('', [$staleResource]);
 
         $this->assertTrue($cache->isFresh());
     }
@@ -63,7 +63,7 @@ class ConfigCacheTest extends TestCase
     public function testIsFreshWhenNoResourceProvided($debug)
     {
         $cache = new ConfigCache($this->cacheFile, $debug);
-        $cache->write('', array());
+        $cache->write('', []);
         $this->assertTrue($cache->isFresh());
     }
 
@@ -73,7 +73,7 @@ class ConfigCacheTest extends TestCase
         $freshResource->setFresh(true);
 
         $cache = new ConfigCache($this->cacheFile, true);
-        $cache->write('', array($freshResource));
+        $cache->write('', [$freshResource]);
 
         $this->assertTrue($cache->isFresh());
     }
@@ -84,16 +84,16 @@ class ConfigCacheTest extends TestCase
         $staleResource->setFresh(false);
 
         $cache = new ConfigCache($this->cacheFile, true);
-        $cache->write('', array($staleResource));
+        $cache->write('', [$staleResource]);
 
         $this->assertFalse($cache->isFresh());
     }
 
     public function debugModes()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
index a95439009d..771057d0b3 100644
--- a/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/ArrayNodeTest.php
@@ -34,7 +34,7 @@ class ArrayNodeTest extends TestCase
     public function testExceptionThrownOnUnrecognizedChild()
     {
         $node = new ArrayNode('root');
-        $node->normalize(array('foo' => 'bar'));
+        $node->normalize(['foo' => 'bar']);
     }
 
     /**
@@ -47,7 +47,7 @@ class ArrayNodeTest extends TestCase
         $node->addChild(new ArrayNode('alpha1'));
         $node->addChild(new ArrayNode('alpha2'));
         $node->addChild(new ArrayNode('beta'));
-        $node->normalize(array('alpha3' => 'foo'));
+        $node->normalize(['alpha3' => 'foo']);
     }
 
     /**
@@ -59,19 +59,19 @@ class ArrayNodeTest extends TestCase
         $node = new ArrayNode('root');
         $node->addChild(new ArrayNode('alpha1'));
         $node->addChild(new ArrayNode('alpha2'));
-        $node->normalize(array('beta' => 'foo'));
+        $node->normalize(['beta' => 'foo']);
     }
 
     public function ignoreAndRemoveMatrixProvider()
     {
         $unrecognizedOptionException = new InvalidConfigurationException('Unrecognized option "foo" under "root"');
 
-        return array(
-            array(true, true, array(), 'no exception is thrown for an unrecognized child if the ignoreExtraKeys option is set to true'),
-            array(true, false, array('foo' => 'bar'), 'extra keys are not removed when ignoreExtraKeys second option is set to false'),
-            array(false, true, $unrecognizedOptionException),
-            array(false, false, $unrecognizedOptionException),
-        );
+        return [
+            [true, true, [], 'no exception is thrown for an unrecognized child if the ignoreExtraKeys option is set to true'],
+            [true, false, ['foo' => 'bar'], 'extra keys are not removed when ignoreExtraKeys second option is set to false'],
+            [false, true, $unrecognizedOptionException],
+            [false, false, $unrecognizedOptionException],
+        ];
     }
 
     /**
@@ -89,7 +89,7 @@ class ArrayNodeTest extends TestCase
         }
         $node = new ArrayNode('root');
         $node->setIgnoreExtraKeys($ignore, $remove);
-        $result = $node->normalize(array('foo' => 'bar'));
+        $result = $node->normalize(['foo' => 'bar']);
         $this->assertSame($expected, $result, $message);
     }
 
@@ -108,24 +108,24 @@ class ArrayNodeTest extends TestCase
 
     public function getPreNormalizationTests()
     {
-        return array(
-            array(
-                array('foo-bar' => 'foo'),
-                array('foo_bar' => 'foo'),
-            ),
-            array(
-                array('foo-bar_moo' => 'foo'),
-                array('foo-bar_moo' => 'foo'),
-            ),
-            array(
-                array('anything-with-dash-and-no-underscore' => 'first', 'no_dash' => 'second'),
-                array('anything_with_dash_and_no_underscore' => 'first', 'no_dash' => 'second'),
-            ),
-            array(
-                array('foo-bar' => null, 'foo_bar' => 'foo'),
-                array('foo-bar' => null, 'foo_bar' => 'foo'),
-            ),
-        );
+        return [
+            [
+                ['foo-bar' => 'foo'],
+                ['foo_bar' => 'foo'],
+            ],
+            [
+                ['foo-bar_moo' => 'foo'],
+                ['foo-bar_moo' => 'foo'],
+            ],
+            [
+                ['anything-with-dash-and-no-underscore' => 'first', 'no_dash' => 'second'],
+                ['anything_with_dash_and_no_underscore' => 'first', 'no_dash' => 'second'],
+            ],
+            [
+                ['foo-bar' => null, 'foo_bar' => 'foo'],
+                ['foo-bar' => null, 'foo_bar' => 'foo'],
+            ],
+        ];
     }
 
     /**
@@ -150,30 +150,30 @@ class ArrayNodeTest extends TestCase
 
     public function getZeroNamedNodeExamplesData()
     {
-        return array(
-            array(
-                array(
-                    0 => array(
+        return [
+            [
+                [
+                    0 => [
                         'name' => 'something',
-                    ),
-                    5 => array(
+                    ],
+                    5 => [
                         0 => 'this won\'t work too',
                         'new_key' => 'some other value',
-                    ),
+                    ],
                     'string_key' => 'just value',
-                ),
-                array(
-                    0 => array(
+                ],
+                [
+                    0 => [
                         'name' => 'something',
-                    ),
-                    5 => array(
+                    ],
+                    5 => [
                         0 => 'this won\'t work too',
                         'new_key' => 'some other value',
-                    ),
+                    ],
                     'string_key' => 'just value',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
     }
 
     /**
@@ -197,12 +197,12 @@ class ArrayNodeTest extends TestCase
 
     public function getPreNormalizedNormalizedOrderedData()
     {
-        return array(
-            array(
-                array('2' => 'two', '1' => 'one', '3' => 'three'),
-                array('2' => 'two', '1' => 'one', '3' => 'three'),
-            ),
-        );
+        return [
+            [
+                ['2' => 'two', '1' => 'one', '3' => 'three'],
+                ['2' => 'two', '1' => 'one', '3' => 'three'],
+            ],
+        ];
     }
 
     /**
@@ -263,13 +263,13 @@ class ArrayNodeTest extends TestCase
         };
 
         $prevErrorHandler = set_error_handler($deprecationHandler);
-        $node->finalize(array());
+        $node->finalize([]);
         restore_error_handler();
 
         $this->assertFalse($deprecationTriggered, '->finalize() should not trigger if the deprecated node is not set');
 
         $prevErrorHandler = set_error_handler($deprecationHandler);
-        $node->finalize(array('foo' => array()));
+        $node->finalize(['foo' => []]);
         restore_error_handler();
         $this->assertTrue($deprecationTriggered, '->finalize() should trigger if the deprecated node is set');
     }
diff --git a/src/Symfony/Component/Config/Tests/Definition/BaseNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/BaseNodeTest.php
index a606bf407d..68fa1c7d31 100644
--- a/src/Symfony/Component/Config/Tests/Definition/BaseNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/BaseNodeTest.php
@@ -22,7 +22,7 @@ class BaseNodeTest extends TestCase
      */
     public function testGetPathForChildNode($expected, array $params)
     {
-        $constructorArgs = array();
+        $constructorArgs = [];
         $constructorArgs[] = $params[0];
 
         if (isset($params[1])) {
@@ -46,11 +46,11 @@ class BaseNodeTest extends TestCase
 
     public function providePath()
     {
-        return array(
-            'name only' => array('root', array('root')),
-            'name and parent' => array('foo.bar.baz.bim', array('bim', 'foo.bar.baz')),
-            'name and separator' => array('foo', array('foo', null, '/')),
-            'name, parent and separator' => array('foo.bar/baz/bim', array('bim', 'foo.bar/baz', '/')),
-        );
+        return [
+            'name only' => ['root', ['root']],
+            'name and parent' => ['foo.bar.baz.bim', ['bim', 'foo.bar.baz']],
+            'name and separator' => ['foo', ['foo', null, '/']],
+            'name, parent and separator' => ['foo.bar/baz/bim', ['bim', 'foo.bar/baz', '/']],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
index ab1d316414..bfa2fd3e28 100644
--- a/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/BooleanNodeTest.php
@@ -40,10 +40,10 @@ class BooleanNodeTest extends TestCase
 
     public function getValidValues()
     {
-        return array(
-            array(false),
-            array(true),
-        );
+        return [
+            [false],
+            [true],
+        ];
     }
 
     /**
@@ -58,17 +58,17 @@ class BooleanNodeTest extends TestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(null),
-            array(''),
-            array('foo'),
-            array(0),
-            array(1),
-            array(0.0),
-            array(0.1),
-            array(array()),
-            array(array('foo' => 'bar')),
-            array(new \stdClass()),
-        );
+        return [
+            [null],
+            [''],
+            ['foo'],
+            [0],
+            [1],
+            [0.0],
+            [0.1],
+            [[]],
+            [['foo' => 'bar']],
+            [new \stdClass()],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
index 0d4cad96bd..0aa2a08ab4 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ArrayNodeDefinitionTest.php
@@ -50,13 +50,13 @@ class ArrayNodeDefinitionTest extends TestCase
 
     public function providePrototypeNodeSpecificCalls()
     {
-        return array(
-            array('defaultValue', array(array())),
-            array('addDefaultChildrenIfNoneSet', array()),
-            array('requiresAtLeastOneElement', array()),
-            array('cannotBeEmpty', array()),
-            array('useAttributeAsKey', array('foo')),
-        );
+        return [
+            ['defaultValue', [[]]],
+            ['addDefaultChildrenIfNoneSet', []],
+            ['requiresAtLeastOneElement', []],
+            ['cannotBeEmpty', []],
+            ['useAttributeAsKey', ['foo']],
+        ];
     }
 
     /**
@@ -79,7 +79,7 @@ class ArrayNodeDefinitionTest extends TestCase
     {
         $node = new ArrayNodeDefinition('root');
         $node
-            ->defaultValue(array())
+            ->defaultValue([])
             ->addDefaultChildrenIfNoneSet('foo')
             ->prototype('array')
         ;
@@ -94,7 +94,7 @@ class ArrayNodeDefinitionTest extends TestCase
             ->prototype('array')
         ;
         $tree = $node->getNode();
-        $this->assertEquals(array(array()), $tree->getDefaultValue());
+        $this->assertEquals([[]], $tree->getDefaultValue());
     }
 
     /**
@@ -134,14 +134,14 @@ class ArrayNodeDefinitionTest extends TestCase
 
     public function providePrototypedArrayNodeDefaults()
     {
-        return array(
-            array(null, true, false, array(array())),
-            array(2, true, false, array(array(), array())),
-            array('2', false, true, array('2' => array())),
-            array('foo', false, true, array('foo' => array())),
-            array(array('foo'), false, true, array('foo' => array())),
-            array(array('foo', 'bar'), false, true, array('foo' => array(), 'bar' => array())),
-        );
+        return [
+            [null, true, false, [[]]],
+            [2, true, false, [[], []]],
+            ['2', false, true, ['2' => []]],
+            ['foo', false, true, ['foo' => []]],
+            [['foo'], false, true, ['foo' => []]],
+            [['foo', 'bar'], false, true, ['foo' => [], 'bar' => []]],
+        ];
     }
 
     public function testNestedPrototypedArrayNodes()
@@ -167,7 +167,7 @@ class ArrayNodeDefinitionTest extends TestCase
                 ->scalarNode('foo')->defaultValue('bar')->end()
         ;
 
-        $this->assertEquals(array('enabled' => false, 'foo' => 'bar'), $node->getNode()->getDefaultValue());
+        $this->assertEquals(['enabled' => false, 'foo' => 'bar'], $node->getNode()->getDefaultValue());
     }
 
     /**
@@ -196,9 +196,9 @@ class ArrayNodeDefinitionTest extends TestCase
         $node->canBeDisabled();
 
         $this->assertTrue($this->getField($node, 'addDefaults'));
-        $this->assertEquals(array('enabled' => false), $this->getField($node, 'falseEquivalent'));
-        $this->assertEquals(array('enabled' => true), $this->getField($node, 'trueEquivalent'));
-        $this->assertEquals(array('enabled' => true), $this->getField($node, 'nullEquivalent'));
+        $this->assertEquals(['enabled' => false], $this->getField($node, 'falseEquivalent'));
+        $this->assertEquals(['enabled' => true], $this->getField($node, 'trueEquivalent'));
+        $this->assertEquals(['enabled' => true], $this->getField($node, 'nullEquivalent'));
 
         $nodeChildren = $this->getField($node, 'children');
         $this->assertArrayHasKey('enabled', $nodeChildren);
@@ -248,7 +248,7 @@ class ArrayNodeDefinitionTest extends TestCase
             ->end()
         ;
 
-        $this->assertSame(array(), $node->getNode()->normalize(array('value' => null)));
+        $this->assertSame([], $node->getNode()->normalize(['value' => null]));
     }
 
     public function testPrototypeVariable()
@@ -295,14 +295,14 @@ class ArrayNodeDefinitionTest extends TestCase
 
     public function getEnableableNodeFixtures()
     {
-        return array(
-            array(array('enabled' => true, 'foo' => 'bar'), array(true), 'true enables an enableable node'),
-            array(array('enabled' => true, 'foo' => 'bar'), array(null), 'null enables an enableable node'),
-            array(array('enabled' => true, 'foo' => 'bar'), array(array('enabled' => true)), 'An enableable node can be enabled'),
-            array(array('enabled' => true, 'foo' => 'baz'), array(array('foo' => 'baz')), 'any configuration enables an enableable node'),
-            array(array('enabled' => false, 'foo' => 'baz'), array(array('foo' => 'baz', 'enabled' => false)), 'An enableable node can be disabled'),
-            array(array('enabled' => false, 'foo' => 'bar'), array(false), 'false disables an enableable node'),
-        );
+        return [
+            [['enabled' => true, 'foo' => 'bar'], [true], 'true enables an enableable node'],
+            [['enabled' => true, 'foo' => 'bar'], [null], 'null enables an enableable node'],
+            [['enabled' => true, 'foo' => 'bar'], [['enabled' => true]], 'An enableable node can be enabled'],
+            [['enabled' => true, 'foo' => 'baz'], [['foo' => 'baz']], 'any configuration enables an enableable node'],
+            [['enabled' => false, 'foo' => 'baz'], [['foo' => 'baz', 'enabled' => false]], 'An enableable node can be disabled'],
+            [['enabled' => false, 'foo' => 'bar'], [false], 'false disables an enableable node'],
+        ];
     }
 
     public function testRequiresAtLeastOneElement()
@@ -312,7 +312,7 @@ class ArrayNodeDefinitionTest extends TestCase
             ->requiresAtLeastOneElement()
             ->integerPrototype();
 
-        $node->getNode()->finalize(array(1));
+        $node->getNode()->finalize([1]);
 
         $this->addToAssertionCount(1);
     }
@@ -328,7 +328,7 @@ class ArrayNodeDefinitionTest extends TestCase
             ->cannotBeEmpty()
             ->integerPrototype();
 
-        $node->getNode()->finalize(array());
+        $node->getNode()->finalize([]);
     }
 
     public function testSetDeprecated()
@@ -354,7 +354,7 @@ class ArrayNodeDefinitionTest extends TestCase
         $node = new ArrayNodeDefinition('root');
         $node->cannotBeEmpty();
 
-        $node->getNode()->finalize(array());
+        $node->getNode()->finalize([]);
     }
 
     protected function getField($object, $field)
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
index 9c0aa0e11c..26f8586dcb 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/EnumNodeDefinitionTest.php
@@ -19,19 +19,19 @@ class EnumNodeDefinitionTest extends TestCase
     public function testWithOneValue()
     {
         $def = new EnumNodeDefinition('foo');
-        $def->values(array('foo'));
+        $def->values(['foo']);
 
         $node = $def->getNode();
-        $this->assertEquals(array('foo'), $node->getValues());
+        $this->assertEquals(['foo'], $node->getValues());
     }
 
     public function testWithOneDistinctValue()
     {
         $def = new EnumNodeDefinition('foo');
-        $def->values(array('foo', 'foo'));
+        $def->values(['foo', 'foo']);
 
         $node = $def->getNode();
-        $this->assertEquals(array('foo'), $node->getValues());
+        $this->assertEquals(['foo'], $node->getValues());
     }
 
     /**
@@ -51,22 +51,22 @@ class EnumNodeDefinitionTest extends TestCase
     public function testWithNoValues()
     {
         $def = new EnumNodeDefinition('foo');
-        $def->values(array());
+        $def->values([]);
     }
 
     public function testGetNode()
     {
         $def = new EnumNodeDefinition('foo');
-        $def->values(array('foo', 'bar'));
+        $def->values(['foo', 'bar']);
 
         $node = $def->getNode();
-        $this->assertEquals(array('foo', 'bar'), $node->getValues());
+        $this->assertEquals(['foo', 'bar'], $node->getValues());
     }
 
     public function testSetDeprecated()
     {
         $def = new EnumNodeDefinition('foo');
-        $def->values(array('foo', 'bar'));
+        $def->values(['foo', 'bar']);
         $def->setDeprecated('The "%path%" node is deprecated.');
 
         $node = $def->getNode();
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
index 156a92d359..9486d4f90b 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/ExprBuilderTest.php
@@ -31,7 +31,7 @@ class ExprBuilderTest extends TestCase
             ->ifTrue()
             ->then($this->returnClosure('new_value'))
         ->end();
-        $this->assertFinalizedValueIs('new_value', $test, array('key' => true));
+        $this->assertFinalizedValueIs('new_value', $test, ['key' => true]);
 
         $test = $this->getTestBuilder()
             ->ifTrue(function ($v) { return true; })
@@ -58,7 +58,7 @@ class ExprBuilderTest extends TestCase
             ->ifString()
             ->then($this->returnClosure('new_value'))
         ->end();
-        $this->assertFinalizedValueIs(45, $test, array('key' => 45));
+        $this->assertFinalizedValueIs(45, $test, ['key' => 45]);
     }
 
     public function testIfNullExpression()
@@ -67,7 +67,7 @@ class ExprBuilderTest extends TestCase
             ->ifNull()
             ->then($this->returnClosure('new_value'))
         ->end();
-        $this->assertFinalizedValueIs('new_value', $test, array('key' => null));
+        $this->assertFinalizedValueIs('new_value', $test, ['key' => null]);
 
         $test = $this->getTestBuilder()
             ->ifNull()
@@ -82,7 +82,7 @@ class ExprBuilderTest extends TestCase
             ->ifEmpty()
             ->then($this->returnClosure('new_value'))
         ->end();
-        $this->assertFinalizedValueIs('new_value', $test, array('key' => array()));
+        $this->assertFinalizedValueIs('new_value', $test, ['key' => []]);
 
         $test = $this->getTestBuilder()
             ->ifEmpty()
@@ -97,7 +97,7 @@ class ExprBuilderTest extends TestCase
             ->ifArray()
             ->then($this->returnClosure('new_value'))
         ->end();
-        $this->assertFinalizedValueIs('new_value', $test, array('key' => array()));
+        $this->assertFinalizedValueIs('new_value', $test, ['key' => []]);
 
         $test = $this->getTestBuilder()
             ->ifArray()
@@ -109,13 +109,13 @@ class ExprBuilderTest extends TestCase
     public function testIfInArrayExpression()
     {
         $test = $this->getTestBuilder()
-            ->ifInArray(array('foo', 'bar', 'value'))
+            ->ifInArray(['foo', 'bar', 'value'])
             ->then($this->returnClosure('new_value'))
         ->end();
         $this->assertFinalizedValueIs('new_value', $test);
 
         $test = $this->getTestBuilder()
-            ->ifInArray(array('foo', 'bar'))
+            ->ifInArray(['foo', 'bar'])
             ->then($this->returnClosure('new_value'))
         ->end();
         $this->assertFinalizedValueIs('value', $test);
@@ -124,13 +124,13 @@ class ExprBuilderTest extends TestCase
     public function testIfNotInArrayExpression()
     {
         $test = $this->getTestBuilder()
-            ->ifNotInArray(array('foo', 'bar'))
+            ->ifNotInArray(['foo', 'bar'])
             ->then($this->returnClosure('new_value'))
         ->end();
         $this->assertFinalizedValueIs('new_value', $test);
 
         $test = $this->getTestBuilder()
-            ->ifNotInArray(array('foo', 'bar', 'value_from_config'))
+            ->ifNotInArray(['foo', 'bar', 'value_from_config'])
             ->then($this->returnClosure('new_value'))
         ->end();
         $this->assertFinalizedValueIs('new_value', $test);
@@ -142,7 +142,7 @@ class ExprBuilderTest extends TestCase
             ->ifString()
             ->thenEmptyArray()
         ->end();
-        $this->assertFinalizedValueIs(array(), $test);
+        $this->assertFinalizedValueIs([], $test);
     }
 
     /**
@@ -153,15 +153,15 @@ class ExprBuilderTest extends TestCase
         $test = $this->getTestBuilder()
             ->castToArray()
         ->end();
-        $this->assertFinalizedValueIs($expectedValue, $test, array('key' => $configValue));
+        $this->assertFinalizedValueIs($expectedValue, $test, ['key' => $configValue]);
     }
 
     public function castToArrayValues()
     {
-        yield array('value', array('value'));
-        yield array(-3.14, array(-3.14));
-        yield array(null, array(null));
-        yield array(array('value'), array('value'));
+        yield ['value', ['value']];
+        yield [-3.14, [-3.14]];
+        yield [null, [null]];
+        yield [['value'], ['value']];
     }
 
     /**
@@ -182,7 +182,7 @@ class ExprBuilderTest extends TestCase
             ->ifString()
             ->thenUnset()
         ->end();
-        $this->assertEquals(array(), $this->finalizeTestBuilder($test));
+        $this->assertEquals([], $this->finalizeTestBuilder($test));
     }
 
     /**
@@ -227,7 +227,7 @@ class ExprBuilderTest extends TestCase
      *
      * @param TreeBuilder $testBuilder The tree builder to finalize
      * @param array       $config      The config you want to use for the finalization, if nothing provided
-     *                                 a simple array('key'=>'value') will be used
+     *                                 a simple ['key'=>'value'] will be used
      *
      * @return array The finalized config values
      */
@@ -238,7 +238,7 @@ class ExprBuilderTest extends TestCase
             ->end()
             ->end()
             ->buildTree()
-            ->finalize(null === $config ? array('key' => 'value') : $config)
+            ->finalize(null === $config ? ['key' => 'value'] : $config)
         ;
     }
 
@@ -265,6 +265,6 @@ class ExprBuilderTest extends TestCase
      */
     protected function assertFinalizedValueIs($value, $treeBuilder, $config = null)
     {
-        $this->assertEquals(array('key' => $value), $this->finalizeTestBuilder($treeBuilder, $config));
+        $this->assertEquals(['key' => $value], $this->finalizeTestBuilder($treeBuilder, $config));
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeDefinitionTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeDefinitionTest.php
index 1a602bb9da..fba713386a 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/NodeDefinitionTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/NodeDefinitionTest.php
@@ -20,7 +20,7 @@ class NodeDefinitionTest extends TestCase
 {
     public function testDefaultPathSeparatorIsDot()
     {
-        $node = $this->getMockForAbstractClass(NodeDefinition::class, array('foo'));
+        $node = $this->getMockForAbstractClass(NodeDefinition::class, ['foo']);
 
         $this->assertAttributeSame('.', 'pathSeparator', $node);
     }
diff --git a/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php b/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
index 27c8ea231d..0dae83be41 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Builder/TreeBuilderTest.php
@@ -115,7 +115,7 @@ class TreeBuilderTest extends TestCase
         $builder = new TreeBuilder('test');
 
         $builder->getRootNode()
-            ->example(array('key' => 'value'))
+            ->example(['key' => 'value'])
             ->children()
                 ->node('child', 'variable')->info('child info')->defaultValue('default')->example('example')
             ->end()
diff --git a/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php b/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
index bf4db95f41..3cb9121ba6 100644
--- a/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/Dumper/YamlReferenceDumperTest.php
@@ -28,12 +28,12 @@ class YamlReferenceDumperTest extends TestCase
 
     public function provideDumpAtPath()
     {
-        return array(
-            'Regular node' => array('scalar_true', <<<EOL
+        return [
+            'Regular node' => ['scalar_true', <<<EOL
 scalar_true:          true
 EOL
-            ),
-            'Array node' => array('array', <<<EOL
+            ],
+            'Array node' => ['array', <<<EOL
 # some info
 array:
     child1:               ~
@@ -44,12 +44,12 @@ array:
     # which should be indented
     child3:               ~ # Example: example setting
 EOL
-            ),
-            'Regular nested' => array('array.child2', <<<EOL
+            ],
+            'Regular nested' => ['array.child2', <<<EOL
 child2:               ~
 EOL
-            ),
-            'Prototype' => array('cms_pages.page', <<<EOL
+            ],
+            'Prototype' => ['cms_pages.page', <<<EOL
 # Prototype
 page:
 
@@ -58,15 +58,15 @@ page:
         title:                ~ # Required
         path:                 ~ # Required
 EOL
-            ),
-            'Nested prototype' => array('cms_pages.page.locale', <<<EOL
+            ],
+            'Nested prototype' => ['cms_pages.page.locale', <<<EOL
 # Prototype
 locale:
     title:                ~ # Required
     path:                 ~ # Required
 EOL
-            ),
-        );
+            ],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
index 48468db260..8d679be980 100644
--- a/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/EnumNodeTest.php
@@ -18,7 +18,7 @@ class EnumNodeTest extends TestCase
 {
     public function testFinalizeValue()
     {
-        $node = new EnumNode('foo', null, array('foo', 'bar'));
+        $node = new EnumNode('foo', null, ['foo', 'bar']);
         $this->assertSame('foo', $node->finalize('foo'));
     }
 
@@ -28,24 +28,24 @@ class EnumNodeTest extends TestCase
      */
     public function testConstructionWithNoValues()
     {
-        new EnumNode('foo', null, array());
+        new EnumNode('foo', null, []);
     }
 
     public function testConstructionWithOneValue()
     {
-        $node = new EnumNode('foo', null, array('foo'));
+        $node = new EnumNode('foo', null, ['foo']);
         $this->assertSame('foo', $node->finalize('foo'));
     }
 
     public function testConstructionWithOneDistinctValue()
     {
-        $node = new EnumNode('foo', null, array('foo', 'foo'));
+        $node = new EnumNode('foo', null, ['foo', 'foo']);
         $this->assertSame('foo', $node->finalize('foo'));
     }
 
     public function testConstructionWithNullName()
     {
-        $node = new EnumNode(null, null, array('foo'));
+        $node = new EnumNode(null, null, ['foo']);
         $this->assertSame('foo', $node->finalize('foo'));
     }
 
@@ -55,7 +55,7 @@ class EnumNodeTest extends TestCase
      */
     public function testFinalizeWithInvalidValue()
     {
-        $node = new EnumNode('foo', null, array('foo', 'bar'));
+        $node = new EnumNode('foo', null, ['foo', 'bar']);
         $node->finalize('foobar');
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php b/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
index c4e7d4a6bb..9bdb18304f 100644
--- a/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/FinalizationTest.php
@@ -42,27 +42,27 @@ class FinalizationTest extends TestCase
             ->buildTree()
         ;
 
-        $a = array(
-            'level1' => array(
-                'level2' => array(
+        $a = [
+            'level1' => [
+                'level2' => [
                     'somevalue' => 'foo',
                     'anothervalue' => 'bar',
-                ),
+                ],
                 'level1_scalar' => 'foo',
-            ),
-        );
+            ],
+        ];
 
-        $b = array(
-            'level1' => array(
+        $b = [
+            'level1' => [
                 'level2' => false,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertEquals(array(
-            'level1' => array(
+        $this->assertEquals([
+            'level1' => [
                 'level1_scalar' => 'foo',
-            ),
-        ), $this->process($tree, array($a, $b)));
+            ],
+        ], $this->process($tree, [$a, $b]));
     }
 
     protected function process(NodeInterface $tree, array $configs)
diff --git a/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
index b7ec12fa73..8268fe83ba 100644
--- a/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/FloatNodeTest.php
@@ -40,16 +40,16 @@ class FloatNodeTest extends TestCase
 
     public function getValidValues()
     {
-        return array(
-            array(1798.0),
-            array(-678.987),
-            array(12.56E45),
-            array(0.0),
+        return [
+            [1798.0],
+            [-678.987],
+            [12.56E45],
+            [0.0],
             // Integer are accepted too, they will be cast
-            array(17),
-            array(-10),
-            array(0),
-        );
+            [17],
+            [-10],
+            [0],
+        ];
     }
 
     /**
@@ -64,15 +64,15 @@ class FloatNodeTest extends TestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(null),
-            array(''),
-            array('foo'),
-            array(true),
-            array(false),
-            array(array()),
-            array(array('foo' => 'bar')),
-            array(new \stdClass()),
-        );
+        return [
+            [null],
+            [''],
+            ['foo'],
+            [true],
+            [false],
+            [[]],
+            [['foo' => 'bar']],
+            [new \stdClass()],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
index 55e8a137b6..b4c17e1cb9 100644
--- a/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/IntegerNodeTest.php
@@ -40,11 +40,11 @@ class IntegerNodeTest extends TestCase
 
     public function getValidValues()
     {
-        return array(
-            array(1798),
-            array(-678),
-            array(0),
-        );
+        return [
+            [1798],
+            [-678],
+            [0],
+        ];
     }
 
     /**
@@ -59,17 +59,17 @@ class IntegerNodeTest extends TestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(null),
-            array(''),
-            array('foo'),
-            array(true),
-            array(false),
-            array(0.0),
-            array(0.1),
-            array(array()),
-            array(array('foo' => 'bar')),
-            array(new \stdClass()),
-        );
+        return [
+            [null],
+            [''],
+            ['foo'],
+            [true],
+            [false],
+            [0.0],
+            [0.1],
+            [[]],
+            [['foo' => 'bar']],
+            [new \stdClass()],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/MergeTest.php b/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
index 587c995bcc..b88205d7b5 100644
--- a/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/MergeTest.php
@@ -33,13 +33,13 @@ class MergeTest extends TestCase
             ->buildTree()
         ;
 
-        $a = array(
+        $a = [
             'foo' => 'bar',
-        );
+        ];
 
-        $b = array(
+        $b = [
             'foo' => 'moo',
-        );
+        ];
 
         $tree->merge($a, $b);
     }
@@ -68,28 +68,28 @@ class MergeTest extends TestCase
             ->buildTree()
         ;
 
-        $a = array(
+        $a = [
             'foo' => 'bar',
-            'unsettable' => array(
+            'unsettable' => [
                 'foo' => 'a',
                 'bar' => 'b',
-            ),
+            ],
             'unsetted' => false,
-        );
+        ];
 
-        $b = array(
+        $b = [
             'foo' => 'moo',
             'bar' => 'b',
             'unsettable' => false,
-            'unsetted' => array('a', 'b'),
-        );
+            'unsetted' => ['a', 'b'],
+        ];
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'foo' => 'moo',
             'bar' => 'b',
             'unsettable' => false,
-            'unsetted' => array('a', 'b'),
-        ), $tree->merge($a, $b));
+            'unsetted' => ['a', 'b'],
+        ], $tree->merge($a, $b));
     }
 
     /**
@@ -114,17 +114,17 @@ class MergeTest extends TestCase
             ->end()
             ->buildTree();
 
-        $a = array(
-            'test' => array(
-                'a' => array('value' => 'foo'),
-            ),
-        );
+        $a = [
+            'test' => [
+                'a' => ['value' => 'foo'],
+            ],
+        ];
 
-        $b = array(
-            'test' => array(
-                'b' => array('value' => 'foo'),
-            ),
-        );
+        $b = [
+            'test' => [
+                'b' => ['value' => 'foo'],
+            ],
+        ];
 
         $tree->merge($a, $b);
     }
@@ -148,24 +148,24 @@ class MergeTest extends TestCase
             ->buildTree()
         ;
 
-        $a = array(
-            'no_deep_merging' => array(
+        $a = [
+            'no_deep_merging' => [
                 'foo' => 'a',
                 'bar' => 'b',
-            ),
-        );
+            ],
+        ];
 
-        $b = array(
-            'no_deep_merging' => array(
+        $b = [
+            'no_deep_merging' => [
                 'c' => 'd',
-            ),
-        );
+            ],
+        ];
 
-        $this->assertEquals(array(
-            'no_deep_merging' => array(
+        $this->assertEquals([
+            'no_deep_merging' => [
                 'c' => 'd',
-            ),
-        ), $tree->merge($a, $b));
+            ],
+        ], $tree->merge($a, $b));
     }
 
     public function testPrototypeWithoutAKeyAttribute()
@@ -183,14 +183,14 @@ class MergeTest extends TestCase
             ->buildTree()
         ;
 
-        $a = array(
-            'append_elements' => array('a', 'b'),
-        );
+        $a = [
+            'append_elements' => ['a', 'b'],
+        ];
 
-        $b = array(
-            'append_elements' => array('c', 'd'),
-        );
+        $b = [
+            'append_elements' => ['c', 'd'],
+        ];
 
-        $this->assertEquals(array('append_elements' => array('a', 'b', 'c', 'd')), $tree->merge($a, $b));
+        $this->assertEquals(['append_elements' => ['a', 'b', 'c', 'd']], $tree->merge($a, $b));
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php b/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
index ceba2e2f0f..ebd9a75b3c 100644
--- a/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/NormalizationTest.php
@@ -30,7 +30,7 @@ class NormalizationTest extends TestCase
                     ->node('encoders', 'array')
                         ->useAttributeAsKey('class')
                         ->prototype('array')
-                            ->beforeNormalization()->ifString()->then(function ($v) { return array('algorithm' => $v); })->end()
+                            ->beforeNormalization()->ifString()->then(function ($v) { return ['algorithm' => $v]; })->end()
                             ->children()
                                 ->node('algorithm', 'scalar')->end()
                             ->end()
@@ -41,54 +41,54 @@ class NormalizationTest extends TestCase
             ->buildTree()
         ;
 
-        $normalized = array(
-            'encoders' => array(
-                'foo' => array('algorithm' => 'plaintext'),
-            ),
-        );
+        $normalized = [
+            'encoders' => [
+                'foo' => ['algorithm' => 'plaintext'],
+            ],
+        ];
 
         $this->assertNormalized($tree, $denormalized, $normalized);
     }
 
     public function getEncoderTests()
     {
-        $configs = array();
+        $configs = [];
 
         // XML
-        $configs[] = array(
-            'encoder' => array(
-                array('class' => 'foo', 'algorithm' => 'plaintext'),
-            ),
-        );
+        $configs[] = [
+            'encoder' => [
+                ['class' => 'foo', 'algorithm' => 'plaintext'],
+            ],
+        ];
 
         // XML when only one element of this type
-        $configs[] = array(
-            'encoder' => array('class' => 'foo', 'algorithm' => 'plaintext'),
-        );
+        $configs[] = [
+            'encoder' => ['class' => 'foo', 'algorithm' => 'plaintext'],
+        ];
 
         // YAML/PHP
-        $configs[] = array(
-            'encoders' => array(
-                array('class' => 'foo', 'algorithm' => 'plaintext'),
-            ),
-        );
+        $configs[] = [
+            'encoders' => [
+                ['class' => 'foo', 'algorithm' => 'plaintext'],
+            ],
+        ];
 
         // YAML/PHP
-        $configs[] = array(
-            'encoders' => array(
+        $configs[] = [
+            'encoders' => [
                 'foo' => 'plaintext',
-            ),
-        );
+            ],
+        ];
 
         // YAML/PHP
-        $configs[] = array(
-            'encoders' => array(
-                'foo' => array('algorithm' => 'plaintext'),
-            ),
-        );
+        $configs[] = [
+            'encoders' => [
+                'foo' => ['algorithm' => 'plaintext'],
+            ],
+        ];
 
         return array_map(function ($v) {
-            return array($v);
+            return [$v];
         }, $configs);
     }
 
@@ -114,28 +114,28 @@ class NormalizationTest extends TestCase
             ->buildTree()
         ;
 
-        $normalized = array('logout' => array('handlers' => array('a', 'b', 'c')));
+        $normalized = ['logout' => ['handlers' => ['a', 'b', 'c']]];
 
         $this->assertNormalized($tree, $denormalized, $normalized);
     }
 
     public function getAnonymousKeysTests()
     {
-        $configs = array();
+        $configs = [];
 
-        $configs[] = array(
-            'logout' => array(
-                'handlers' => array('a', 'b', 'c'),
-            ),
-        );
+        $configs[] = [
+            'logout' => [
+                'handlers' => ['a', 'b', 'c'],
+            ],
+        ];
 
-        $configs[] = array(
-            'logout' => array(
-                'handler' => array('a', 'b', 'c'),
-            ),
-        );
+        $configs[] = [
+            'logout' => [
+                'handler' => ['a', 'b', 'c'],
+            ],
+        ];
 
-        return array_map(function ($v) { return array($v); }, $configs);
+        return array_map(function ($v) { return [$v]; }, $configs);
     }
 
     /**
@@ -143,30 +143,30 @@ class NormalizationTest extends TestCase
      */
     public function testNumericKeysAsAttributes($denormalized)
     {
-        $normalized = array(
-            'thing' => array(42 => array('foo', 'bar'), 1337 => array('baz', 'qux')),
-        );
+        $normalized = [
+            'thing' => [42 => ['foo', 'bar'], 1337 => ['baz', 'qux']],
+        ];
 
         $this->assertNormalized($this->getNumericKeysTestTree(), $denormalized, $normalized);
     }
 
     public function getNumericKeysTests()
     {
-        $configs = array();
+        $configs = [];
 
-        $configs[] = array(
-            'thing' => array(
-                42 => array('foo', 'bar'), 1337 => array('baz', 'qux'),
-            ),
-        );
+        $configs[] = [
+            'thing' => [
+                42 => ['foo', 'bar'], 1337 => ['baz', 'qux'],
+            ],
+        ];
 
-        $configs[] = array(
-            'thing' => array(
-                array('foo', 'bar', 'id' => 42), array('baz', 'qux', 'id' => 1337),
-            ),
-        );
+        $configs[] = [
+            'thing' => [
+                ['foo', 'bar', 'id' => 42], ['baz', 'qux', 'id' => 1337],
+            ],
+        ];
 
-        return array_map(function ($v) { return array($v); }, $configs);
+        return array_map(function ($v) { return [$v]; }, $configs);
     }
 
     /**
@@ -175,13 +175,13 @@ class NormalizationTest extends TestCase
      */
     public function testNonAssociativeArrayThrowsExceptionIfAttributeNotSet()
     {
-        $denormalized = array(
-            'thing' => array(
-                array('foo', 'bar'), array('baz', 'qux'),
-            ),
-        );
+        $denormalized = [
+            'thing' => [
+                ['foo', 'bar'], ['baz', 'qux'],
+            ],
+        ];
 
-        $this->assertNormalized($this->getNumericKeysTestTree(), $denormalized, array());
+        $this->assertNormalized($this->getNumericKeysTestTree(), $denormalized, []);
     }
 
     public function testAssociativeArrayPreserveKeys()
@@ -198,7 +198,7 @@ class NormalizationTest extends TestCase
             ->buildTree()
         ;
 
-        $data = array('first' => array('foo' => 'bar'));
+        $data = ['first' => ['foo' => 'bar']];
 
         $this->assertNormalized($tree, $data, $data);
     }
diff --git a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
index 731d7af25f..6478bd12db 100644
--- a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
@@ -32,8 +32,8 @@ class PrototypedArrayNodeTest extends TestCase
         $node = new PrototypedArrayNode('root');
         $prototype = new ArrayNode(null, $node);
         $node->setPrototype($prototype);
-        $node->setDefaultValue(array('test'));
-        $this->assertEquals(array('test'), $node->getDefaultValue());
+        $node->setDefaultValue(['test']);
+        $this->assertEquals(['test'], $node->getDefaultValue());
     }
 
     // a remapped key (e.g. "mapping" -> "mappings") should be unset after being used
@@ -47,12 +47,12 @@ class PrototypedArrayNodeTest extends TestCase
         $prototype = new ScalarNode(null, $mappingsNode);
         $mappingsNode->setPrototype($prototype);
 
-        $remappings = array();
-        $remappings[] = array('mapping', 'mappings');
+        $remappings = [];
+        $remappings[] = ['mapping', 'mappings'];
         $node->setXmlRemappings($remappings);
 
-        $normalized = $node->normalize(array('mapping' => array('foo', 'bar')));
-        $this->assertEquals(array('mappings' => array('foo', 'bar')), $normalized);
+        $normalized = $node->normalize(['mapping' => ['foo', 'bar']]);
+        $this->assertEquals(['mappings' => ['foo', 'bar']], $normalized);
     }
 
     /**
@@ -66,12 +66,12 @@ class PrototypedArrayNodeTest extends TestCase
      * The above should finally be mapped to an array that looks like this
      * (because "id" is the key attribute).
      *
-     *     array(
-     *         'things' => array(
+     *     [
+     *         'things' => [
      *             'option1' => 'foo',
      *             'option2' => 'bar',
-     *         )
-     *     )
+     *         ]
+     *     ]
      */
     public function testMappedAttributeKeyIsRemoved()
     {
@@ -83,12 +83,12 @@ class PrototypedArrayNodeTest extends TestCase
         $prototype->addChild(new ScalarNode('foo'));
         $node->setPrototype($prototype);
 
-        $children = array();
-        $children[] = array('id' => 'item_name', 'foo' => 'bar');
+        $children = [];
+        $children[] = ['id' => 'item_name', 'foo' => 'bar'];
         $normalized = $node->normalize($children);
 
-        $expected = array();
-        $expected['item_name'] = array('foo' => 'bar');
+        $expected = [];
+        $expected['item_name'] = ['foo' => 'bar'];
         $this->assertEquals($expected, $normalized);
     }
 
@@ -107,12 +107,12 @@ class PrototypedArrayNodeTest extends TestCase
         $prototype->addChild(new ScalarNode('id')); // the key attribute will remain
         $node->setPrototype($prototype);
 
-        $children = array();
-        $children[] = array('id' => 'item_name', 'foo' => 'bar');
+        $children = [];
+        $children[] = ['id' => 'item_name', 'foo' => 'bar'];
         $normalized = $node->normalize($children);
 
-        $expected = array();
-        $expected['item_name'] = array('id' => 'item_name', 'foo' => 'bar');
+        $expected = [];
+        $expected['item_name'] = ['id' => 'item_name', 'foo' => 'bar'];
         $this->assertEquals($expected, $normalized);
     }
 
@@ -121,50 +121,50 @@ class PrototypedArrayNodeTest extends TestCase
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setAddChildrenIfNoneSet();
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array(array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals([['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setKeyAttribute('foobar');
         $node->setAddChildrenIfNoneSet();
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array('defaults' => array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals(['defaults' => ['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setKeyAttribute('foobar');
         $node->setAddChildrenIfNoneSet('defaultkey');
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array('defaultkey' => array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals(['defaultkey' => ['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setKeyAttribute('foobar');
-        $node->setAddChildrenIfNoneSet(array('defaultkey'));
+        $node->setAddChildrenIfNoneSet(['defaultkey']);
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array('defaultkey' => array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals(['defaultkey' => ['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setKeyAttribute('foobar');
-        $node->setAddChildrenIfNoneSet(array('dk1', 'dk2'));
+        $node->setAddChildrenIfNoneSet(['dk1', 'dk2']);
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array('dk1' => array('foo' => 'bar'), 'dk2' => array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals(['dk1' => ['foo' => 'bar'], 'dk2' => ['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
-        $node->setAddChildrenIfNoneSet(array(5, 6));
+        $node->setAddChildrenIfNoneSet([5, 6]);
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array(0 => array('foo' => 'bar'), 1 => array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals([0 => ['foo' => 'bar'], 1 => ['foo' => 'bar']], $node->getDefaultValue());
 
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setAddChildrenIfNoneSet(2);
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array(array('foo' => 'bar'), array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals([['foo' => 'bar'], ['foo' => 'bar']], $node->getDefaultValue());
     }
 
     public function testDefaultChildrenWinsOverDefaultValue()
     {
         $node = $this->getPrototypeNodeWithDefaultChildren();
         $node->setAddChildrenIfNoneSet();
-        $node->setDefaultValue(array('bar' => 'foo'));
+        $node->setDefaultValue(['bar' => 'foo']);
         $this->assertTrue($node->hasDefaultValue());
-        $this->assertEquals(array(array('foo' => 'bar')), $node->getDefaultValue());
+        $this->assertEquals([['foo' => 'bar']], $node->getDefaultValue());
     }
 
     protected function getPrototypeNodeWithDefaultChildren()
@@ -191,11 +191,11 @@ class PrototypedArrayNodeTest extends TestCase
      * The above should finally be mapped to an array that looks like this
      * (because "id" is the key attribute).
      *
-     *     array(
-     *         'things' => array(
+     *     [
+     *         'things' => [
      *             'option1' => 'value1'
-     *         )
-     *     )
+     *         ]
+     *     ]
      *
      * It's also possible to mix 'value-only' and 'non-value-only' elements in the array.
      *
@@ -206,15 +206,15 @@ class PrototypedArrayNodeTest extends TestCase
      *
      * The above should finally be mapped to an array as follows
      *
-     * array(
-     *     'things' => array(
+     * [
+     *     'things' => [
      *         'option1' => 'value1',
-     *         'option2' => array(
+     *         'option2' => [
      *             'value' => 'value2',
      *             'foo' => 'foo2'
-     *         )
-     *     )
-     * )
+     *         ]
+     *     ]
+     * ]
      *
      * The 'value' element can also be ArrayNode:
      *
@@ -229,14 +229,14 @@ class PrototypedArrayNodeTest extends TestCase
      *
      * The above should be finally be mapped to an array as follows
      *
-     * array(
-     *     'things' => array(
-     *         'option1' => array(
+     * [
+     *     'things' => [
+     *         'option1' => [
      *             'foo' => 'foo1',
      *             'bar' => 'bar1'
-     *         )
-     *     )
-     * )
+     *         ]
+     *     ]
+     * ]
      *
      * If using VariableNode for value node, it's also possible to mix different types of value nodes:
      *
@@ -252,15 +252,15 @@ class PrototypedArrayNodeTest extends TestCase
      *
      * The above should be finally mapped to an array as follows
      *
-     * array(
-     *     'things' => array(
-     *         'option1' => array(
+     * [
+     *     'things' => [
+     *         'option1' => [
      *             'foo' => 'foo1',
      *             'bar' => 'bar1'
-     *         ),
+     *         ],
      *         'option2' => 'value2'
-     *     )
-     * )
+     *     ]
+     * ]
      *
      *
      * @dataProvider getDataForKeyRemovedLeftValueOnly
@@ -291,52 +291,52 @@ class PrototypedArrayNodeTest extends TestCase
 
         $variableValue = new VariableNode('value');
 
-        return array(
-           array(
+        return [
+           [
                $scalarValue,
-               array(
-                   array('id' => 'option1', 'value' => 'value1'),
-               ),
-               array('option1' => 'value1'),
-           ),
+               [
+                   ['id' => 'option1', 'value' => 'value1'],
+               ],
+               ['option1' => 'value1'],
+           ],
 
-           array(
+           [
                $scalarValue,
-               array(
-                   array('id' => 'option1', 'value' => 'value1'),
-                   array('id' => 'option2', 'value' => 'value2', 'foo' => 'foo2'),
-               ),
-               array(
+               [
+                   ['id' => 'option1', 'value' => 'value1'],
+                   ['id' => 'option2', 'value' => 'value2', 'foo' => 'foo2'],
+               ],
+               [
                    'option1' => 'value1',
-                   'option2' => array('value' => 'value2', 'foo' => 'foo2'),
-               ),
-           ),
+                   'option2' => ['value' => 'value2', 'foo' => 'foo2'],
+               ],
+           ],
 
-           array(
+           [
                $arrayValue,
-               array(
-                   array(
+               [
+                   [
                        'id' => 'option1',
-                       'value' => array('foo' => 'foo1', 'bar' => 'bar1'),
-                   ),
-               ),
-               array(
-                   'option1' => array('foo' => 'foo1', 'bar' => 'bar1'),
-               ),
-           ),
+                       'value' => ['foo' => 'foo1', 'bar' => 'bar1'],
+                   ],
+               ],
+               [
+                   'option1' => ['foo' => 'foo1', 'bar' => 'bar1'],
+               ],
+           ],
 
-           array($variableValue,
-               array(
-                   array(
-                       'id' => 'option1', 'value' => array('foo' => 'foo1', 'bar' => 'bar1'),
-                   ),
-                   array('id' => 'option2', 'value' => 'value2'),
-               ),
-               array(
-                   'option1' => array('foo' => 'foo1', 'bar' => 'bar1'),
+           [$variableValue,
+               [
+                   [
+                       'id' => 'option1', 'value' => ['foo' => 'foo1', 'bar' => 'bar1'],
+                   ],
+                   ['id' => 'option2', 'value' => 'value2'],
+               ],
+               [
+                   'option1' => ['foo' => 'foo1', 'bar' => 'bar1'],
                    'option2' => 'value2',
-               ),
-           ),
-        );
+               ],
+           ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
index 481ef3f496..ada5b04be9 100644
--- a/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/ScalarNodeTest.php
@@ -28,17 +28,17 @@ class ScalarNodeTest extends TestCase
 
     public function getValidValues()
     {
-        return array(
-            array(false),
-            array(true),
-            array(null),
-            array(''),
-            array('foo'),
-            array(0),
-            array(1),
-            array(0.0),
-            array(0.1),
-        );
+        return [
+            [false],
+            [true],
+            [null],
+            [''],
+            ['foo'],
+            [0],
+            [1],
+            [0.0],
+            [0.1],
+        ];
     }
 
     public function testSetDeprecated()
@@ -62,12 +62,12 @@ class ScalarNodeTest extends TestCase
         };
 
         $prevErrorHandler = set_error_handler($deprecationHandler);
-        $node->finalize(array());
+        $node->finalize([]);
         restore_error_handler();
         $this->assertSame(0, $deprecationTriggered, '->finalize() should not trigger if the deprecated node is not set');
 
         $prevErrorHandler = set_error_handler($deprecationHandler);
-        $node->finalize(array('foo' => ''));
+        $node->finalize(['foo' => '']);
         restore_error_handler();
         $this->assertSame(1, $deprecationTriggered, '->finalize() should trigger if the deprecated node is set');
     }
@@ -84,11 +84,11 @@ class ScalarNodeTest extends TestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(array()),
-            array(array('foo' => 'bar')),
-            array(new \stdClass()),
-        );
+        return [
+            [[]],
+            [['foo' => 'bar']],
+            [new \stdClass()],
+        ];
     }
 
     public function testNormalizeThrowsExceptionWithoutHint()
@@ -102,7 +102,7 @@ class ScalarNodeTest extends TestCase
             $this->setExpectedException('Symfony\Component\Config\Definition\Exception\InvalidTypeException', 'Invalid type for path "test". Expected scalar, but got array.');
         }
 
-        $node->normalize(array());
+        $node->normalize([]);
     }
 
     public function testNormalizeThrowsExceptionWithErrorMessage()
@@ -117,7 +117,7 @@ class ScalarNodeTest extends TestCase
             $this->setExpectedException('Symfony\Component\Config\Definition\Exception\InvalidTypeException', "Invalid type for path \"test\". Expected scalar, but got array.\nHint: \"the test value\"");
         }
 
-        $node->normalize(array());
+        $node->normalize([]);
     }
 
     /**
@@ -135,15 +135,15 @@ class ScalarNodeTest extends TestCase
 
     public function getValidNonEmptyValues()
     {
-        return array(
-            array(false),
-            array(true),
-            array('foo'),
-            array(0),
-            array(1),
-            array(0.0),
-            array(0.1),
-        );
+        return [
+            [false],
+            [true],
+            ['foo'],
+            [0],
+            [1],
+            [0.0],
+            [0.1],
+        ];
     }
 
     /**
@@ -161,9 +161,9 @@ class ScalarNodeTest extends TestCase
 
     public function getEmptyValues()
     {
-        return array(
-            array(null),
-            array(''),
-        );
+        return [
+            [null],
+            [''],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/FileLocatorTest.php b/src/Symfony/Component/Config/Tests/FileLocatorTest.php
index 7120504131..0bd97f7d8a 100644
--- a/src/Symfony/Component/Config/Tests/FileLocatorTest.php
+++ b/src/Symfony/Component/Config/Tests/FileLocatorTest.php
@@ -21,7 +21,7 @@ class FileLocatorTest extends TestCase
      */
     public function testIsAbsolutePath($path)
     {
-        $loader = new FileLocator(array());
+        $loader = new FileLocator([]);
         $r = new \ReflectionObject($loader);
         $m = $r->getMethod('isAbsolutePath');
         $m->setAccessible(true);
@@ -31,14 +31,14 @@ class FileLocatorTest extends TestCase
 
     public function getIsAbsolutePathTests()
     {
-        return array(
-            array('/foo.xml'),
-            array('c:\\\\foo.xml'),
-            array('c:/foo.xml'),
-            array('\\server\\foo.xml'),
-            array('https://server/foo.xml'),
-            array('phar://server/foo.xml'),
-        );
+        return [
+            ['/foo.xml'],
+            ['c:\\\\foo.xml'],
+            ['c:/foo.xml'],
+            ['\\server\\foo.xml'],
+            ['https://server/foo.xml'],
+            ['phar://server/foo.xml'],
+        ];
     }
 
     public function testLocate()
@@ -63,16 +63,16 @@ class FileLocatorTest extends TestCase
             '->locate() returns the absolute filename if the file exists in one of the paths given in the constructor'
         );
 
-        $loader = new FileLocator(array(__DIR__.'/Fixtures', __DIR__.'/Fixtures/Again'));
+        $loader = new FileLocator([__DIR__.'/Fixtures', __DIR__.'/Fixtures/Again']);
 
         $this->assertEquals(
-            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            [__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'],
             $loader->locate('foo.xml', __DIR__, false),
             '->locate() returns an array of absolute filenames'
         );
 
         $this->assertEquals(
-            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            [__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'],
             $loader->locate('foo.xml', __DIR__.'/Fixtures', false),
             '->locate() returns an array of absolute filenames'
         );
@@ -80,7 +80,7 @@ class FileLocatorTest extends TestCase
         $loader = new FileLocator(__DIR__.'/Fixtures/Again');
 
         $this->assertEquals(
-            array(__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'),
+            [__DIR__.'/Fixtures'.\DIRECTORY_SEPARATOR.'foo.xml', __DIR__.'/Fixtures/Again'.\DIRECTORY_SEPARATOR.'foo.xml'],
             $loader->locate('foo.xml', __DIR__.'/Fixtures', false),
             '->locate() returns an array of absolute filenames'
         );
@@ -92,7 +92,7 @@ class FileLocatorTest extends TestCase
      */
     public function testLocateThrowsAnExceptionIfTheFileDoesNotExists()
     {
-        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+        $loader = new FileLocator([__DIR__.'/Fixtures']);
 
         $loader->locate('foobar.xml', __DIR__);
     }
@@ -102,7 +102,7 @@ class FileLocatorTest extends TestCase
      */
     public function testLocateThrowsAnExceptionIfTheFileDoesNotExistsInAbsolutePath()
     {
-        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+        $loader = new FileLocator([__DIR__.'/Fixtures']);
 
         $loader->locate(__DIR__.'/Fixtures/foobar.xml', __DIR__);
     }
@@ -113,7 +113,7 @@ class FileLocatorTest extends TestCase
      */
     public function testLocateEmpty()
     {
-        $loader = new FileLocator(array(__DIR__.'/Fixtures'));
+        $loader = new FileLocator([__DIR__.'/Fixtures']);
 
         $loader->locate(null, __DIR__);
     }
diff --git a/src/Symfony/Component/Config/Tests/Fixtures/Configuration/ExampleConfiguration.php b/src/Symfony/Component/Config/Tests/Fixtures/Configuration/ExampleConfiguration.php
index 4e3b3ac97c..bfa43d964d 100644
--- a/src/Symfony/Component/Config/Tests/Fixtures/Configuration/ExampleConfiguration.php
+++ b/src/Symfony/Component/Config/Tests/Fixtures/Configuration/ExampleConfiguration.php
@@ -31,14 +31,14 @@ class ExampleConfiguration implements ConfigurationInterface
                 ->scalarNode('scalar_true')->defaultTrue()->end()
                 ->scalarNode('scalar_false')->defaultFalse()->end()
                 ->scalarNode('scalar_default')->defaultValue('default')->end()
-                ->scalarNode('scalar_array_empty')->defaultValue(array())->end()
-                ->scalarNode('scalar_array_defaults')->defaultValue(array('elem1', 'elem2'))->end()
+                ->scalarNode('scalar_array_empty')->defaultValue([])->end()
+                ->scalarNode('scalar_array_defaults')->defaultValue(['elem1', 'elem2'])->end()
                 ->scalarNode('scalar_required')->isRequired()->end()
                 ->scalarNode('scalar_deprecated')->setDeprecated()->end()
                 ->scalarNode('scalar_deprecated_with_message')->setDeprecated('Deprecation custom message for "%node%" at "%path%"')->end()
                 ->scalarNode('node_with_a_looong_name')->end()
-                ->enumNode('enum_with_default')->values(array('this', 'that'))->defaultValue('this')->end()
-                ->enumNode('enum')->values(array('this', 'that'))->end()
+                ->enumNode('enum_with_default')->values(['this', 'that'])->defaultValue('this')->end()
+                ->enumNode('enum')->values(['this', 'that'])->end()
                 ->arrayNode('array')
                     ->info('some info')
                     ->canBeUnset()
diff --git a/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
index 4f3f801872..3517cacfd5 100644
--- a/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/DelegatingLoaderTest.php
@@ -36,12 +36,12 @@ class DelegatingLoaderTest extends TestCase
     {
         $loader1 = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
         $loader1->expects($this->once())->method('supports')->will($this->returnValue(true));
-        $loader = new DelegatingLoader(new LoaderResolver(array($loader1)));
+        $loader = new DelegatingLoader(new LoaderResolver([$loader1]));
         $this->assertTrue($loader->supports('foo.xml'), '->supports() returns true if the resource is loadable');
 
         $loader1 = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
         $loader1->expects($this->once())->method('supports')->will($this->returnValue(false));
-        $loader = new DelegatingLoader(new LoaderResolver(array($loader1)));
+        $loader = new DelegatingLoader(new LoaderResolver([$loader1]));
         $this->assertFalse($loader->supports('foo.foo'), '->supports() returns false if the resource is not loadable');
     }
 
@@ -50,7 +50,7 @@ class DelegatingLoaderTest extends TestCase
         $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
         $loader->expects($this->once())->method('supports')->will($this->returnValue(true));
         $loader->expects($this->once())->method('load');
-        $resolver = new LoaderResolver(array($loader));
+        $resolver = new LoaderResolver([$loader]);
         $loader = new DelegatingLoader($resolver);
 
         $loader->load('foo');
@@ -63,7 +63,7 @@ class DelegatingLoaderTest extends TestCase
     {
         $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
         $loader->expects($this->once())->method('supports')->will($this->returnValue(false));
-        $resolver = new LoaderResolver(array($loader));
+        $resolver = new LoaderResolver([$loader]);
         $loader = new DelegatingLoader($resolver);
 
         $loader->load('foo');
diff --git a/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php b/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
index f8409df9d7..b59ace46f9 100644
--- a/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/FileLoaderTest.php
@@ -24,11 +24,11 @@ class FileLoaderTest extends TestCase
 
         $locatorMockForAdditionalLoader = $this->getMockBuilder('Symfony\Component\Config\FileLocatorInterface')->getMock();
         $locatorMockForAdditionalLoader->expects($this->any())->method('locate')->will($this->onConsecutiveCalls(
-                array('path/to/file1'),                    // Default
-                array('path/to/file1', 'path/to/file2'),   // First is imported
-                array('path/to/file1', 'path/to/file2'),   // Second is imported
-                array('path/to/file1'),                    // Exception
-                array('path/to/file1', 'path/to/file2')    // Exception
+                ['path/to/file1'],                    // Default
+                ['path/to/file1', 'path/to/file2'],   // First is imported
+                ['path/to/file1', 'path/to/file2'],   // Second is imported
+                ['path/to/file1'],                    // Exception
+                ['path/to/file1', 'path/to/file2']    // Exception
                 ));
 
         $fileLoader = new TestFileLoader($locatorMock);
@@ -38,7 +38,7 @@ class FileLoaderTest extends TestCase
         $additionalLoader = new TestFileLoader($locatorMockForAdditionalLoader);
         $additionalLoader->setCurrentDir('.');
 
-        $fileLoader->setResolver($loaderResolver = new LoaderResolver(array($fileLoader, $additionalLoader)));
+        $fileLoader->setResolver($loaderResolver = new LoaderResolver([$fileLoader, $additionalLoader]));
 
         // Default case
         $this->assertSame('path/to/file1', $fileLoader->import('my_resource'));
@@ -118,7 +118,7 @@ class TestFileLoader extends FileLoader
 
     public function clearLoading()
     {
-        self::$loading = array();
+        self::$loading = [];
     }
 
     public function setSupports($supports)
diff --git a/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php b/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
index 0bf56b610e..487dc43adc 100644
--- a/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
+++ b/src/Symfony/Component/Config/Tests/Loader/LoaderResolverTest.php
@@ -18,22 +18,22 @@ class LoaderResolverTest extends TestCase
 {
     public function testConstructor()
     {
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock(),
-        ));
+        ]);
 
-        $this->assertEquals(array($loader), $resolver->getLoaders(), '__construct() takes an array of loaders as its first argument');
+        $this->assertEquals([$loader], $resolver->getLoaders(), '__construct() takes an array of loaders as its first argument');
     }
 
     public function testResolve()
     {
         $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
-        $resolver = new LoaderResolver(array($loader));
+        $resolver = new LoaderResolver([$loader]);
         $this->assertFalse($resolver->resolve('foo.foo'), '->resolve() returns false if no loader is able to load the resource');
 
         $loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock();
         $loader->expects($this->once())->method('supports')->will($this->returnValue(true));
-        $resolver = new LoaderResolver(array($loader));
+        $resolver = new LoaderResolver([$loader]);
         $this->assertEquals($loader, $resolver->resolve(function () {}), '->resolve() returns the loader for the given resource');
     }
 
@@ -42,6 +42,6 @@ class LoaderResolverTest extends TestCase
         $resolver = new LoaderResolver();
         $resolver->addLoader($loader = $this->getMockBuilder('Symfony\Component\Config\Loader\LoaderInterface')->getMock());
 
-        $this->assertEquals(array($loader), $resolver->getLoaders(), 'addLoader() adds a loader');
+        $this->assertEquals([$loader], $resolver->getLoaders(), 'addLoader() adds a loader');
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
index cf20e43b50..85f6c02ee6 100644
--- a/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/DirectoryResourceTest.php
@@ -178,6 +178,6 @@ class DirectoryResourceTest extends TestCase
         $resourceA = new DirectoryResource($this->directory, '/.xml$/');
         $resourceB = new DirectoryResource($this->directory, '/.yaml$/');
 
-        $this->assertCount(2, array_unique(array($resourceA, $resourceB)));
+        $this->assertCount(2, array_unique([$resourceA, $resourceB]));
     }
 }
diff --git a/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
index 188b5572ec..5e0b248002 100644
--- a/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/GlobResourceTest.php
@@ -33,7 +33,7 @@ class GlobResourceTest extends TestCase
         $paths = iterator_to_array($resource);
 
         $file = $dir.'/Resource'.\DIRECTORY_SEPARATOR.'ConditionalClass.php';
-        $this->assertEquals(array($file => new \SplFileInfo($file)), $paths);
+        $this->assertEquals([$file => new \SplFileInfo($file)], $paths);
         $this->assertInstanceOf('SplFileInfo', current($paths));
         $this->assertSame($dir, $resource->getPrefix());
 
@@ -42,7 +42,7 @@ class GlobResourceTest extends TestCase
         $paths = iterator_to_array($resource);
 
         $file = $dir.\DIRECTORY_SEPARATOR.'Resource'.\DIRECTORY_SEPARATOR.'ConditionalClass.php';
-        $this->assertEquals(array($file => $file), $paths);
+        $this->assertEquals([$file => $file], $paths);
         $this->assertInstanceOf('SplFileInfo', current($paths));
         $this->assertSame($dir, $resource->getPrefix());
     }
@@ -62,7 +62,7 @@ class GlobResourceTest extends TestCase
     public function testIteratorSkipsFoldersForGivenExcludedPrefixes()
     {
         $dir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
-        $resource = new GlobResource($dir, '/*Exclude*', true, false, array($dir.\DIRECTORY_SEPARATOR.'Exclude' => true));
+        $resource = new GlobResource($dir, '/*Exclude*', true, false, [$dir.\DIRECTORY_SEPARATOR.'Exclude' => true]);
 
         $paths = iterator_to_array($resource);
 
@@ -76,7 +76,7 @@ class GlobResourceTest extends TestCase
     public function testIteratorSkipsSubfoldersForGivenExcludedPrefixes()
     {
         $dir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
-        $resource = new GlobResource($dir, '/*Exclude/*', true, false, array($dir.\DIRECTORY_SEPARATOR.'Exclude' => true));
+        $resource = new GlobResource($dir, '/*Exclude/*', true, false, [$dir.\DIRECTORY_SEPARATOR.'Exclude' => true]);
 
         $paths = iterator_to_array($resource);
 
@@ -90,7 +90,7 @@ class GlobResourceTest extends TestCase
     public function testIteratorSkipsFoldersWithForwardSlashForGivenExcludedPrefixes()
     {
         $dir = \dirname(__DIR__).\DIRECTORY_SEPARATOR.'Fixtures';
-        $resource = new GlobResource($dir, '/*Exclude*', true, false, array($dir.'/Exclude' => true));
+        $resource = new GlobResource($dir, '/*Exclude*', true, false, [$dir.'/Exclude' => true]);
 
         $paths = iterator_to_array($resource);
 
diff --git a/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php b/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
index 229e83e89b..abc461cd7c 100644
--- a/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
+++ b/src/Symfony/Component/Config/Tests/Resource/ReflectionClassResourceTest.php
@@ -71,7 +71,7 @@ class ReflectionClassResourceTest extends TestCase
 /* 2*/  {
 /* 3*/      const FOO = 123;
 /* 4*/
-/* 5*/      public $pub = array();
+/* 5*/      public $pub = [];
 /* 6*/
 /* 7*/      protected $prot;
 /* 8*/
@@ -79,7 +79,7 @@ class ReflectionClassResourceTest extends TestCase
 /*10*/
 /*11*/      public function pub($arg = null) {}
 /*12*/
-/*13*/      protected function prot($a = array()) {}
+/*13*/      protected function prot($a = []) {}
 /*14*/
 /*15*/      private function priv() {}
 /*16*/  }
@@ -110,29 +110,29 @@ EOPHP;
 
     public function provideHashedSignature()
     {
-        yield array(0, 0, "// line change\n\n");
-        yield array(1, 0, '/** class docblock */');
-        yield array(1, 1, 'abstract class %s');
-        yield array(1, 1, 'final class %s');
-        yield array(1, 1, 'class %s extends Exception');
-        yield array(1, 1, 'class %s implements '.DummyInterface::class);
-        yield array(1, 3, 'const FOO = 456;');
-        yield array(1, 3, 'const BAR = 123;');
-        yield array(1, 4, '/** pub docblock */');
-        yield array(1, 5, 'protected $pub = array();');
-        yield array(1, 5, 'public $pub = array(123);');
-        yield array(1, 6, '/** prot docblock */');
-        yield array(1, 7, 'private $prot;');
-        yield array(0, 8, '/** priv docblock */');
-        yield array(0, 9, 'private $priv = 123;');
-        yield array(1, 10, '/** pub docblock */');
-        yield array(1, 11, 'public function pub(...$arg) {}');
-        yield array(1, 11, 'public function pub($arg = null): Foo {}');
-        yield array(0, 11, "public function pub(\$arg = null) {\nreturn 123;\n}");
-        yield array(1, 12, '/** prot docblock */');
-        yield array(1, 13, 'protected function prot($a = array(123)) {}');
-        yield array(0, 14, '/** priv docblock */');
-        yield array(0, 15, '');
+        yield [0, 0, "// line change\n\n"];
+        yield [1, 0, '/** class docblock */'];
+        yield [1, 1, 'abstract class %s'];
+        yield [1, 1, 'final class %s'];
+        yield [1, 1, 'class %s extends Exception'];
+        yield [1, 1, 'class %s implements '.DummyInterface::class];
+        yield [1, 3, 'const FOO = 456;'];
+        yield [1, 3, 'const BAR = 123;'];
+        yield [1, 4, '/** pub docblock */'];
+        yield [1, 5, 'protected $pub = [];'];
+        yield [1, 5, 'public $pub = [123];'];
+        yield [1, 6, '/** prot docblock */'];
+        yield [1, 7, 'private $prot;'];
+        yield [0, 8, '/** priv docblock */'];
+        yield [0, 9, 'private $priv = 123;'];
+        yield [1, 10, '/** pub docblock */'];
+        yield [1, 11, 'public function pub(...$arg) {}'];
+        yield [1, 11, 'public function pub($arg = null): Foo {}'];
+        yield [0, 11, "public function pub(\$arg = null) {\nreturn 123;\n}"];
+        yield [1, 12, '/** prot docblock */'];
+        yield [1, 13, 'protected function prot($a = [123]) {}'];
+        yield [0, 14, '/** priv docblock */'];
+        yield [0, 15, ''];
     }
 
     public function testEventSubscriber()
@@ -140,7 +140,7 @@ EOPHP;
         $res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
         $this->assertTrue($res->isFresh(0));
 
-        TestEventSubscriber::$subscribedEvents = array(123);
+        TestEventSubscriber::$subscribedEvents = [123];
         $this->assertFalse($res->isFresh(0));
 
         $res = new ReflectionClassResource(new \ReflectionClass(TestEventSubscriber::class));
@@ -152,7 +152,7 @@ EOPHP;
         $res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
         $this->assertTrue($res->isFresh(0));
 
-        TestServiceSubscriber::$subscribedServices = array(123);
+        TestServiceSubscriber::$subscribedServices = [123];
         $this->assertFalse($res->isFresh(0));
 
         $res = new ReflectionClassResource(new \ReflectionClass(TestServiceSubscriber::class));
@@ -166,7 +166,7 @@ interface DummyInterface
 
 class TestEventSubscriber implements EventSubscriberInterface
 {
-    public static $subscribedEvents = array();
+    public static $subscribedEvents = [];
 
     public static function getSubscribedEvents()
     {
@@ -176,7 +176,7 @@ class TestEventSubscriber implements EventSubscriberInterface
 
 class TestServiceSubscriber implements ServiceSubscriberInterface
 {
-    public static $subscribedServices = array();
+    public static $subscribedServices = [];
 
     public static function getSubscribedServices()
     {
diff --git a/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php b/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
index bb29ac02a4..a2c2eeb811 100644
--- a/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
+++ b/src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php
@@ -27,7 +27,7 @@ class ResourceCheckerConfigCacheTest extends TestCase
 
     protected function tearDown()
     {
-        $files = array($this->cacheFile, "{$this->cacheFile}.meta");
+        $files = [$this->cacheFile, "{$this->cacheFile}.meta"];
 
         foreach ($files as $file) {
             if (file_exists($file)) {
@@ -52,7 +52,7 @@ class ResourceCheckerConfigCacheTest extends TestCase
             It does not matter if you provide checkers or not. */
 
         unlink($this->cacheFile); // remove tempnam() side effect
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
 
         $this->assertFalse($cache->isFresh());
     }
@@ -67,7 +67,7 @@ class ResourceCheckerConfigCacheTest extends TestCase
 
     public function testCacheIsFreshIfEmptyCheckerIteratorProvided()
     {
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, new \ArrayIterator(array()));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, new \ArrayIterator([]));
         $this->assertTrue($cache->isFresh());
     }
 
@@ -75,7 +75,7 @@ class ResourceCheckerConfigCacheTest extends TestCase
     {
         /* As in the previous test, but this time we have a resource. */
         $cache = new ResourceCheckerConfigCache($this->cacheFile);
-        $cache->write('', array(new ResourceStub()));
+        $cache->write('', [new ResourceStub()]);
 
         $this->assertTrue($cache->isFresh()); // no (matching) ResourceChecker passed
     }
@@ -92,8 +92,8 @@ class ResourceCheckerConfigCacheTest extends TestCase
                   ->method('isFresh')
                   ->willReturn(true);
 
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
-        $cache->write('', array(new ResourceStub()));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('', [new ResourceStub()]);
 
         $this->assertTrue($cache->isFresh());
     }
@@ -110,8 +110,8 @@ class ResourceCheckerConfigCacheTest extends TestCase
                   ->method('isFresh')
                   ->willReturn(false);
 
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
-        $cache->write('', array(new ResourceStub()));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('', [new ResourceStub()]);
 
         $this->assertFalse($cache->isFresh());
     }
@@ -119,8 +119,8 @@ class ResourceCheckerConfigCacheTest extends TestCase
     public function testCacheIsNotFreshWhenUnserializeFails()
     {
         $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
-        $cache->write('foo', array(new FileResource(__FILE__)));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('foo', [new FileResource(__FILE__)]);
 
         $metaFile = "{$this->cacheFile}.meta";
         file_put_contents($metaFile, str_replace('FileResource', 'ClassNotHere', file_get_contents($metaFile)));
@@ -139,8 +139,8 @@ class ResourceCheckerConfigCacheTest extends TestCase
     public function testCacheIsNotFreshIfNotExistsMetaFile()
     {
         $checker = $this->getMockBuilder('\Symfony\Component\Config\ResourceCheckerInterface')->getMock();
-        $cache = new ResourceCheckerConfigCache($this->cacheFile, array($checker));
-        $cache->write('foo', array(new FileResource(__FILE__)));
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('foo', [new FileResource(__FILE__)]);
 
         $metaFile = "{$this->cacheFile}.meta";
         unlink($metaFile);
diff --git a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
index 10b4a7a9b4..0a6637f785 100644
--- a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
+++ b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
@@ -52,14 +52,14 @@ class XmlUtilsTest extends TestCase
         $mock->expects($this->exactly(2))->method('validate')->will($this->onConsecutiveCalls(false, true));
 
         try {
-            XmlUtils::loadFile($fixtures.'valid.xml', array($mock, 'validate'));
+            XmlUtils::loadFile($fixtures.'valid.xml', [$mock, 'validate']);
             $this->fail();
         } catch (\InvalidArgumentException $e) {
             $this->assertRegExp('/The XML file ".+" is not valid\./', $e->getMessage());
         }
 
-        $this->assertInstanceOf('DOMDocument', XmlUtils::loadFile($fixtures.'valid.xml', array($mock, 'validate')));
-        $this->assertSame(array(), libxml_get_errors());
+        $this->assertInstanceOf('DOMDocument', XmlUtils::loadFile($fixtures.'valid.xml', [$mock, 'validate']));
+        $this->assertSame([], libxml_get_errors());
     }
 
     /**
@@ -73,16 +73,16 @@ class XmlUtilsTest extends TestCase
         $mock = $this->getMockBuilder(__NAMESPACE__.'\Validator')->getMock();
         $mock->expects($this->once())->method('validate')->willReturn(false);
 
-        XmlUtils::parse(file_get_contents($fixtures.'valid.xml'), array($mock, 'validate'));
+        XmlUtils::parse(file_get_contents($fixtures.'valid.xml'), [$mock, 'validate']);
     }
 
     public function testLoadFileWithInternalErrorsEnabled()
     {
         $internalErrors = libxml_use_internal_errors(true);
 
-        $this->assertSame(array(), libxml_get_errors());
+        $this->assertSame([], libxml_get_errors());
         $this->assertInstanceOf('DOMDocument', XmlUtils::loadFile(__DIR__.'/../Fixtures/Util/invalid_schema.xml'));
-        $this->assertSame(array(), libxml_get_errors());
+        $this->assertSame([], libxml_get_errors());
 
         libxml_clear_errors();
         libxml_use_internal_errors($internalErrors);
@@ -101,25 +101,25 @@ class XmlUtilsTest extends TestCase
 
     public function getDataForConvertDomToArray()
     {
-        return array(
-            array(null, ''),
-            array('bar', 'bar'),
-            array(array('bar' => 'foobar'), '<foo bar="foobar" />', true),
-            array(array('foo' => null), '<foo />'),
-            array(array('foo' => 'bar'), '<foo>bar</foo>'),
-            array(array('foo' => array('foo' => 'bar')), '<foo foo="bar"/>'),
-            array(array('foo' => array('foo' => 0)), '<foo><foo>0</foo></foo>'),
-            array(array('foo' => array('foo' => 'bar')), '<foo><foo>bar</foo></foo>'),
-            array(array('foo' => array('foo' => 'bar', 'value' => 'text')), '<foo foo="bar">text</foo>'),
-            array(array('foo' => array('attr' => 'bar', 'foo' => 'text')), '<foo attr="bar"><foo>text</foo></foo>'),
-            array(array('foo' => array('bar', 'text')), '<foo>bar</foo><foo>text</foo>'),
-            array(array('foo' => array(array('foo' => 'bar'), array('foo' => 'text'))), '<foo foo="bar"/><foo foo="text" />'),
-            array(array('foo' => array('foo' => array('bar', 'text'))), '<foo foo="bar"><foo>text</foo></foo>'),
-            array(array('foo' => 'bar'), '<foo><!-- Comment -->bar</foo>'),
-            array(array('foo' => 'text'), '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>'),
-            array(array('foo' => array('bar' => 'bar', 'value' => 'text')), '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>', false, false),
-            array(array('attr' => 1, 'b' => 'hello'), '<foo:a xmlns:foo="http://www.example.org/foo" xmlns:h="http://www.example.org/bar" attr="1" h:bar="bar"><foo:b>hello</foo:b><h:c>2</h:c></foo:a>', true),
-        );
+        return [
+            [null, ''],
+            ['bar', 'bar'],
+            [['bar' => 'foobar'], '<foo bar="foobar" />', true],
+            [['foo' => null], '<foo />'],
+            [['foo' => 'bar'], '<foo>bar</foo>'],
+            [['foo' => ['foo' => 'bar']], '<foo foo="bar"/>'],
+            [['foo' => ['foo' => 0]], '<foo><foo>0</foo></foo>'],
+            [['foo' => ['foo' => 'bar']], '<foo><foo>bar</foo></foo>'],
+            [['foo' => ['foo' => 'bar', 'value' => 'text']], '<foo foo="bar">text</foo>'],
+            [['foo' => ['attr' => 'bar', 'foo' => 'text']], '<foo attr="bar"><foo>text</foo></foo>'],
+            [['foo' => ['bar', 'text']], '<foo>bar</foo><foo>text</foo>'],
+            [['foo' => [['foo' => 'bar'], ['foo' => 'text']]], '<foo foo="bar"/><foo foo="text" />'],
+            [['foo' => ['foo' => ['bar', 'text']]], '<foo foo="bar"><foo>text</foo></foo>'],
+            [['foo' => 'bar'], '<foo><!-- Comment -->bar</foo>'],
+            [['foo' => 'text'], '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>'],
+            [['foo' => ['bar' => 'bar', 'value' => 'text']], '<foo xmlns:h="http://www.example.org/bar" h:bar="bar">text</foo>', false, false],
+            [['attr' => 1, 'b' => 'hello'], '<foo:a xmlns:foo="http://www.example.org/foo" xmlns:h="http://www.example.org/bar" attr="1" h:bar="bar"><foo:b>hello</foo:b><h:c>2</h:c></foo:a>', true],
+        ];
     }
 
     /**
@@ -132,34 +132,34 @@ class XmlUtilsTest extends TestCase
 
     public function getDataForPhpize()
     {
-        return array(
-            array('', ''),
-            array(null, 'null'),
-            array(true, 'true'),
-            array(false, 'false'),
-            array(null, 'Null'),
-            array(true, 'True'),
-            array(false, 'False'),
-            array(0, '0'),
-            array(1, '1'),
-            array(-1, '-1'),
-            array(0777, '0777'),
-            array(255, '0xFF'),
-            array(100.0, '1e2'),
-            array(-120.0, '-1.2E2'),
-            array(-10100.1, '-10100.1'),
-            array('-10,100.1', '-10,100.1'),
-            array('1234 5678 9101 1121 3141', '1234 5678 9101 1121 3141'),
-            array('1,2,3,4', '1,2,3,4'),
-            array('11,22,33,44', '11,22,33,44'),
-            array('11,222,333,4', '11,222,333,4'),
-            array('1,222,333,444', '1,222,333,444'),
-            array('11,222,333,444', '11,222,333,444'),
-            array('111,222,333,444', '111,222,333,444'),
-            array('1111,2222,3333,4444,5555', '1111,2222,3333,4444,5555'),
-            array('foo', 'foo'),
-            array(6, '0b0110'),
-        );
+        return [
+            ['', ''],
+            [null, 'null'],
+            [true, 'true'],
+            [false, 'false'],
+            [null, 'Null'],
+            [true, 'True'],
+            [false, 'False'],
+            [0, '0'],
+            [1, '1'],
+            [-1, '-1'],
+            [0777, '0777'],
+            [255, '0xFF'],
+            [100.0, '1e2'],
+            [-120.0, '-1.2E2'],
+            [-10100.1, '-10100.1'],
+            ['-10,100.1', '-10,100.1'],
+            ['1234 5678 9101 1121 3141', '1234 5678 9101 1121 3141'],
+            ['1,2,3,4', '1,2,3,4'],
+            ['11,22,33,44', '11,22,33,44'],
+            ['11,222,333,4', '11,222,333,4'],
+            ['1,222,333,444', '1,222,333,444'],
+            ['11,222,333,444', '11,222,333,444'],
+            ['111,222,333,444', '111,222,333,444'],
+            ['1111,2222,3333,4444,5555', '1111,2222,3333,4444,5555'],
+            ['foo', 'foo'],
+            [6, '0b0110'],
+        ];
     }
 
     public function testLoadEmptyXmlFile()
diff --git a/src/Symfony/Component/Config/Util/XmlUtils.php b/src/Symfony/Component/Config/Util/XmlUtils.php
index b29e51e0f6..cca11e7b92 100644
--- a/src/Symfony/Component/Config/Util/XmlUtils.php
+++ b/src/Symfony/Component/Config/Util/XmlUtils.php
@@ -158,9 +158,9 @@ class XmlUtils
     {
         $prefix = (string) $element->prefix;
         $empty = true;
-        $config = array();
+        $config = [];
         foreach ($element->attributes as $name => $node) {
-            if ($checkPrefix && !\in_array((string) $node->prefix, array('', $prefix), true)) {
+            if ($checkPrefix && !\in_array((string) $node->prefix, ['', $prefix], true)) {
                 continue;
             }
             $config[$name] = static::phpize($node->value);
@@ -182,7 +182,7 @@ class XmlUtils
                 $key = $node->localName;
                 if (isset($config[$key])) {
                     if (!\is_array($config[$key]) || !\is_int(key($config[$key]))) {
-                        $config[$key] = array($config[$key]);
+                        $config[$key] = [$config[$key]];
                     }
                     $config[$key][] = $value;
                 } else {
@@ -249,7 +249,7 @@ class XmlUtils
 
     protected static function getXmlErrors($internalErrors)
     {
-        $errors = array();
+        $errors = [];
         foreach (libxml_get_errors() as $error) {
             $errors[] = sprintf('[%s %s] %s (in %s - line %d, column %d)',
                 LIBXML_ERR_WARNING == $error->level ? 'WARNING' : 'ERROR',
diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index 2686019cd1..f96d690589 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -62,7 +62,7 @@ use Symfony\Component\EventDispatcher\EventDispatcherInterface;
  */
 class Application
 {
-    private $commands = array();
+    private $commands = [];
     private $wantHelps = false;
     private $runningCommand;
     private $name;
@@ -193,17 +193,17 @@ class Application
      */
     public function doRun(InputInterface $input, OutputInterface $output)
     {
-        if (true === $input->hasParameterOption(array('--version', '-V'), true)) {
+        if (true === $input->hasParameterOption(['--version', '-V'], true)) {
             $output->writeln($this->getLongVersion());
 
             return 0;
         }
 
         $name = $this->getCommandName($input);
-        if (true === $input->hasParameterOption(array('--help', '-h'), true)) {
+        if (true === $input->hasParameterOption(['--help', '-h'], true)) {
             if (!$name) {
                 $name = 'help';
-                $input = new ArrayInput(array('command_name' => $this->defaultCommand));
+                $input = new ArrayInput(['command_name' => $this->defaultCommand]);
             } else {
                 $this->wantHelps = true;
             }
@@ -214,9 +214,9 @@ class Application
             $definition = $this->getDefinition();
             $definition->setArguments(array_merge(
                 $definition->getArguments(),
-                array(
+                [
                     'command' => new InputArgument('command', InputArgument::OPTIONAL, $definition->getArgument('command')->getDescription(), $name),
-                )
+                ]
             ));
         }
 
@@ -535,7 +535,7 @@ class Application
      */
     public function getNamespaces()
     {
-        $namespaces = array();
+        $namespaces = [];
         foreach ($this->all() as $command) {
             $namespaces = array_merge($namespaces, $this->extractAllNamespaces($command->getName()));
 
@@ -602,7 +602,7 @@ class Application
     {
         $this->init();
 
-        $aliases = array();
+        $aliases = [];
         $allCommands = $this->commandLoader ? array_merge($this->commandLoader->getNames(), array_keys($this->commands)) : array_keys($this->commands);
         $expr = preg_replace_callback('{([^:]+|)}', function ($matches) { return preg_quote($matches[1]).'[^:]*'; }, $name);
         $commands = preg_grep('{^'.$expr.'}', $allCommands);
@@ -695,7 +695,7 @@ class Application
             return $commands;
         }
 
-        $commands = array();
+        $commands = [];
         foreach ($this->commands as $name => $command) {
             if ($namespace === $this->extractNamespace($name, substr_count($namespace, ':') + 1)) {
                 $commands[$name] = $command;
@@ -722,7 +722,7 @@ class Application
      */
     public static function getAbbreviations($names)
     {
-        $abbrevs = array();
+        $abbrevs = [];
         foreach ($names as $name) {
             for ($len = \strlen($name); $len > 0; --$len) {
                 $abbrev = substr($name, 0, $len);
@@ -768,18 +768,18 @@ class Application
             }
 
             $width = $this->terminal->getWidth() ? $this->terminal->getWidth() - 1 : PHP_INT_MAX;
-            $lines = array();
-            foreach ('' !== $message ? preg_split('/\r?\n/', $message) : array() as $line) {
+            $lines = [];
+            foreach ('' !== $message ? preg_split('/\r?\n/', $message) : [] as $line) {
                 foreach ($this->splitStringByWidth($line, $width - 4) as $line) {
                     // pre-format lines to get the right string length
                     $lineLength = Helper::strlen($line) + 4;
-                    $lines[] = array($line, $lineLength);
+                    $lines[] = [$line, $lineLength];
 
                     $len = max($lineLength, $len);
                 }
             }
 
-            $messages = array();
+            $messages = [];
             if (!$e instanceof ExceptionInterface || OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
                 $messages[] = sprintf('<comment>%s</comment>', OutputFormatter::escape(sprintf('In %s line %s:', basename($e->getFile()) ?: 'n/a', $e->getLine() ?: 'n/a')));
             }
@@ -801,12 +801,12 @@ class Application
                 // exception related properties
                 $trace = $e->getTrace();
 
-                array_unshift($trace, array(
+                array_unshift($trace, [
                     'function' => '',
                     'file' => $e->getFile() ?: 'n/a',
                     'line' => $e->getLine() ?: 'n/a',
-                    'args' => array(),
-                ));
+                    'args' => [],
+                ]);
 
                 for ($i = 0, $count = \count($trace); $i < $count; ++$i) {
                     $class = isset($trace[$i]['class']) ? $trace[$i]['class'] : '';
@@ -828,13 +828,13 @@ class Application
      */
     protected function configureIO(InputInterface $input, OutputInterface $output)
     {
-        if (true === $input->hasParameterOption(array('--ansi'), true)) {
+        if (true === $input->hasParameterOption(['--ansi'], true)) {
             $output->setDecorated(true);
-        } elseif (true === $input->hasParameterOption(array('--no-ansi'), true)) {
+        } elseif (true === $input->hasParameterOption(['--no-ansi'], true)) {
             $output->setDecorated(false);
         }
 
-        if (true === $input->hasParameterOption(array('--no-interaction', '-n'), true)) {
+        if (true === $input->hasParameterOption(['--no-interaction', '-n'], true)) {
             $input->setInteractive(false);
         } elseif (\function_exists('posix_isatty')) {
             $inputStream = null;
@@ -856,7 +856,7 @@ class Application
             default: $shellVerbosity = 0; break;
         }
 
-        if (true === $input->hasParameterOption(array('--quiet', '-q'), true)) {
+        if (true === $input->hasParameterOption(['--quiet', '-q'], true)) {
             $output->setVerbosity(OutputInterface::VERBOSITY_QUIET);
             $shellVerbosity = -1;
         } else {
@@ -957,7 +957,7 @@ class Application
      */
     protected function getDefaultInputDefinition()
     {
-        return new InputDefinition(array(
+        return new InputDefinition([
             new InputArgument('command', InputArgument::REQUIRED, 'The command to execute'),
 
             new InputOption('--help', '-h', InputOption::VALUE_NONE, 'Display this help message'),
@@ -967,7 +967,7 @@ class Application
             new InputOption('--ansi', '', InputOption::VALUE_NONE, 'Force ANSI output'),
             new InputOption('--no-ansi', '', InputOption::VALUE_NONE, 'Disable ANSI output'),
             new InputOption('--no-interaction', '-n', InputOption::VALUE_NONE, 'Do not ask any interactive question'),
-        ));
+        ]);
     }
 
     /**
@@ -977,7 +977,7 @@ class Application
      */
     protected function getDefaultCommands()
     {
-        return array(new HelpCommand(), new ListCommand());
+        return [new HelpCommand(), new ListCommand()];
     }
 
     /**
@@ -987,12 +987,12 @@ class Application
      */
     protected function getDefaultHelperSet()
     {
-        return new HelperSet(array(
+        return new HelperSet([
             new FormatterHelper(),
             new DebugFormatterHelper(),
             new ProcessHelper(),
             new QuestionHelper(),
-        ));
+        ]);
     }
 
     /**
@@ -1037,9 +1037,9 @@ class Application
     private function findAlternatives($name, $collection)
     {
         $threshold = 1e3;
-        $alternatives = array();
+        $alternatives = [];
 
-        $collectionParts = array();
+        $collectionParts = [];
         foreach ($collection as $item) {
             $collectionParts[$item] = explode(':', $item);
         }
@@ -1116,7 +1116,7 @@ class Application
         }
 
         $utf8String = mb_convert_encoding($string, 'utf8', $encoding);
-        $lines = array();
+        $lines = [];
         $line = '';
         foreach (preg_split('//u', $utf8String) as $char) {
             // test if $char could be appended to current line
@@ -1147,7 +1147,7 @@ class Application
     {
         // -1 as third argument is needed to skip the command short name when exploding
         $parts = explode(':', $name, -1);
-        $namespaces = array();
+        $namespaces = [];
 
         foreach ($parts as $part) {
             if (\count($namespaces)) {
diff --git a/src/Symfony/Component/Console/CHANGELOG.md b/src/Symfony/Component/Console/CHANGELOG.md
index 017decf63b..e014a4e2f3 100644
--- a/src/Symfony/Component/Console/CHANGELOG.md
+++ b/src/Symfony/Component/Console/CHANGELOG.md
@@ -9,7 +9,7 @@ CHANGELOG
 4.2.0
 -----
 
- * allowed passing commands as `array($process, 'ENV_VAR' => 'value')` to
+ * allowed passing commands as `[$process, 'ENV_VAR' => 'value']` to
    `ProcessHelper::run()` to pass environment variables
  * deprecated passing a command as a string to `ProcessHelper::run()`,
    pass it the command as an array of its arguments instead
diff --git a/src/Symfony/Component/Console/Command/Command.php b/src/Symfony/Component/Console/Command/Command.php
index f58ae2337f..18d683de93 100644
--- a/src/Symfony/Component/Console/Command/Command.php
+++ b/src/Symfony/Component/Console/Command/Command.php
@@ -37,7 +37,7 @@ class Command
     private $application;
     private $name;
     private $processTitle;
-    private $aliases = array();
+    private $aliases = [];
     private $definition;
     private $hidden = false;
     private $help;
@@ -46,8 +46,8 @@ class Command
     private $applicationDefinitionMerged = false;
     private $applicationDefinitionMergedWithArgs = false;
     private $code;
-    private $synopsis = array();
-    private $usages = array();
+    private $synopsis = [];
+    private $usages = [];
     private $helperSet;
 
     /**
@@ -527,14 +527,14 @@ class Command
         $name = $this->name;
         $isSingleCommand = $this->application && $this->application->isSingleCommand();
 
-        $placeholders = array(
+        $placeholders = [
             '%command.name%',
             '%command.full_name%',
-        );
-        $replacements = array(
+        ];
+        $replacements = [
             $name,
             $isSingleCommand ? $_SERVER['PHP_SELF'] : $_SERVER['PHP_SELF'].' '.$name,
-        );
+        ];
 
         return str_replace($placeholders, $replacements, $this->getHelp() ?: $this->getDescription());
     }
diff --git a/src/Symfony/Component/Console/Command/HelpCommand.php b/src/Symfony/Component/Console/Command/HelpCommand.php
index 1e20b008aa..23847766b6 100644
--- a/src/Symfony/Component/Console/Command/HelpCommand.php
+++ b/src/Symfony/Component/Console/Command/HelpCommand.php
@@ -35,11 +35,11 @@ class HelpCommand extends Command
 
         $this
             ->setName('help')
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', 'help'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
                 new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw command help'),
-            ))
+            ])
             ->setDescription('Displays help for a command')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays help for a given command:
@@ -71,10 +71,10 @@ EOF
         }
 
         $helper = new DescriptorHelper();
-        $helper->describe($output, $this->command, array(
+        $helper->describe($output, $this->command, [
             'format' => $input->getOption('format'),
             'raw_text' => $input->getOption('raw'),
-        ));
+        ]);
 
         $this->command = null;
     }
diff --git a/src/Symfony/Component/Console/Command/ListCommand.php b/src/Symfony/Component/Console/Command/ListCommand.php
index 5d932338c6..7259b1263b 100644
--- a/src/Symfony/Component/Console/Command/ListCommand.php
+++ b/src/Symfony/Component/Console/Command/ListCommand.php
@@ -69,11 +69,11 @@ EOF
     protected function execute(InputInterface $input, OutputInterface $output)
     {
         $helper = new DescriptorHelper();
-        $helper->describe($output, $this->getApplication(), array(
+        $helper->describe($output, $this->getApplication(), [
             'format' => $input->getOption('format'),
             'raw_text' => $input->getOption('raw'),
             'namespace' => $input->getArgument('namespace'),
-        ));
+        ]);
     }
 
     /**
@@ -81,10 +81,10 @@ EOF
      */
     private function createDefinition()
     {
-        return new InputDefinition(array(
+        return new InputDefinition([
             new InputArgument('namespace', InputArgument::OPTIONAL, 'The namespace name'),
             new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw command list'),
             new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt, xml, json, or md)', 'txt'),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Console/DependencyInjection/AddConsoleCommandPass.php b/src/Symfony/Component/Console/DependencyInjection/AddConsoleCommandPass.php
index bf14ba2d17..666c8fa598 100644
--- a/src/Symfony/Component/Console/DependencyInjection/AddConsoleCommandPass.php
+++ b/src/Symfony/Component/Console/DependencyInjection/AddConsoleCommandPass.php
@@ -38,9 +38,9 @@ class AddConsoleCommandPass implements CompilerPassInterface
     public function process(ContainerBuilder $container)
     {
         $commandServices = $container->findTaggedServiceIds($this->commandTag, true);
-        $lazyCommandMap = array();
-        $lazyCommandRefs = array();
-        $serviceIds = array();
+        $lazyCommandMap = [];
+        $lazyCommandRefs = [];
+        $serviceIds = [];
 
         foreach ($commandServices as $id => $tags) {
             $definition = $container->getDefinition($id);
@@ -72,7 +72,7 @@ class AddConsoleCommandPass implements CompilerPassInterface
             unset($tags[0]);
             $lazyCommandMap[$commandName] = $id;
             $lazyCommandRefs[$id] = new TypedReference($id, $class);
-            $aliases = array();
+            $aliases = [];
 
             foreach ($tags as $tag) {
                 if (isset($tag['command'])) {
@@ -81,17 +81,17 @@ class AddConsoleCommandPass implements CompilerPassInterface
                 }
             }
 
-            $definition->addMethodCall('setName', array($commandName));
+            $definition->addMethodCall('setName', [$commandName]);
 
             if ($aliases) {
-                $definition->addMethodCall('setAliases', array($aliases));
+                $definition->addMethodCall('setAliases', [$aliases]);
             }
         }
 
         $container
             ->register($this->commandLoaderServiceId, ContainerCommandLoader::class)
             ->setPublic(true)
-            ->setArguments(array(ServiceLocatorTagPass::register($container, $lazyCommandRefs), $lazyCommandMap));
+            ->setArguments([ServiceLocatorTagPass::register($container, $lazyCommandRefs), $lazyCommandMap]);
 
         $container->setParameter('console.command.ids', $serviceIds);
     }
diff --git a/src/Symfony/Component/Console/Descriptor/ApplicationDescription.php b/src/Symfony/Component/Console/Descriptor/ApplicationDescription.php
index 5d34778621..03bfcfcda4 100644
--- a/src/Symfony/Component/Console/Descriptor/ApplicationDescription.php
+++ b/src/Symfony/Component/Console/Descriptor/ApplicationDescription.php
@@ -92,12 +92,12 @@ class ApplicationDescription
 
     private function inspectApplication()
     {
-        $this->commands = array();
-        $this->namespaces = array();
+        $this->commands = [];
+        $this->namespaces = [];
 
         $all = $this->application->all($this->namespace ? $this->application->findNamespace($this->namespace) : null);
         foreach ($this->sortCommands($all) as $namespace => $commands) {
-            $names = array();
+            $names = [];
 
             /** @var Command $command */
             foreach ($commands as $name => $command) {
@@ -114,14 +114,14 @@ class ApplicationDescription
                 $names[] = $name;
             }
 
-            $this->namespaces[$namespace] = array('id' => $namespace, 'commands' => $names);
+            $this->namespaces[$namespace] = ['id' => $namespace, 'commands' => $names];
         }
     }
 
     private function sortCommands(array $commands): array
     {
-        $namespacedCommands = array();
-        $globalCommands = array();
+        $namespacedCommands = [];
+        $globalCommands = [];
         foreach ($commands as $name => $command) {
             $key = $this->application->extractNamespace($name, 1);
             if (!$key) {
diff --git a/src/Symfony/Component/Console/Descriptor/Descriptor.php b/src/Symfony/Component/Console/Descriptor/Descriptor.php
index 151d84f72a..d25a708e47 100644
--- a/src/Symfony/Component/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/Descriptor.php
@@ -34,7 +34,7 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = array())
+    public function describe(OutputInterface $output, $object, array $options = [])
     {
         $this->output = $output;
 
@@ -75,33 +75,33 @@ abstract class Descriptor implements DescriptorInterface
      *
      * @return string|mixed
      */
-    abstract protected function describeInputArgument(InputArgument $argument, array $options = array());
+    abstract protected function describeInputArgument(InputArgument $argument, array $options = []);
 
     /**
      * Describes an InputOption instance.
      *
      * @return string|mixed
      */
-    abstract protected function describeInputOption(InputOption $option, array $options = array());
+    abstract protected function describeInputOption(InputOption $option, array $options = []);
 
     /**
      * Describes an InputDefinition instance.
      *
      * @return string|mixed
      */
-    abstract protected function describeInputDefinition(InputDefinition $definition, array $options = array());
+    abstract protected function describeInputDefinition(InputDefinition $definition, array $options = []);
 
     /**
      * Describes a Command instance.
      *
      * @return string|mixed
      */
-    abstract protected function describeCommand(Command $command, array $options = array());
+    abstract protected function describeCommand(Command $command, array $options = []);
 
     /**
      * Describes an Application instance.
      *
      * @return string|mixed
      */
-    abstract protected function describeApplication(Application $application, array $options = array());
+    abstract protected function describeApplication(Application $application, array $options = []);
 }
diff --git a/src/Symfony/Component/Console/Descriptor/DescriptorInterface.php b/src/Symfony/Component/Console/Descriptor/DescriptorInterface.php
index 5d3339a9e6..fbc07df879 100644
--- a/src/Symfony/Component/Console/Descriptor/DescriptorInterface.php
+++ b/src/Symfony/Component/Console/Descriptor/DescriptorInterface.php
@@ -27,5 +27,5 @@ interface DescriptorInterface
      * @param object          $object
      * @param array           $options
      */
-    public function describe(OutputInterface $output, $object, array $options = array());
+    public function describe(OutputInterface $output, $object, array $options = []);
 }
diff --git a/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
index f60323becd..197b843d4b 100644
--- a/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/JsonDescriptor.php
@@ -29,7 +29,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputArgument(InputArgument $argument, array $options = array())
+    protected function describeInputArgument(InputArgument $argument, array $options = [])
     {
         $this->writeData($this->getInputArgumentData($argument), $options);
     }
@@ -37,7 +37,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputOption(InputOption $option, array $options = array())
+    protected function describeInputOption(InputOption $option, array $options = [])
     {
         $this->writeData($this->getInputOptionData($option), $options);
     }
@@ -45,7 +45,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputDefinition(InputDefinition $definition, array $options = array())
+    protected function describeInputDefinition(InputDefinition $definition, array $options = [])
     {
         $this->writeData($this->getInputDefinitionData($definition), $options);
     }
@@ -53,7 +53,7 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCommand(Command $command, array $options = array())
+    protected function describeCommand(Command $command, array $options = [])
     {
         $this->writeData($this->getCommandData($command), $options);
     }
@@ -61,17 +61,17 @@ class JsonDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeApplication(Application $application, array $options = array())
+    protected function describeApplication(Application $application, array $options = [])
     {
         $describedNamespace = isset($options['namespace']) ? $options['namespace'] : null;
         $description = new ApplicationDescription($application, $describedNamespace, true);
-        $commands = array();
+        $commands = [];
 
         foreach ($description->getCommands() as $command) {
             $commands[] = $this->getCommandData($command);
         }
 
-        $data = array();
+        $data = [];
         if ('UNKNOWN' !== $application->getName()) {
             $data['application']['name'] = $application->getName();
             if ('UNKNOWN' !== $application->getVersion()) {
@@ -105,13 +105,13 @@ class JsonDescriptor extends Descriptor
      */
     private function getInputArgumentData(InputArgument $argument)
     {
-        return array(
+        return [
             'name' => $argument->getName(),
             'is_required' => $argument->isRequired(),
             'is_array' => $argument->isArray(),
             'description' => preg_replace('/\s*[\r\n]\s*/', ' ', $argument->getDescription()),
             'default' => INF === $argument->getDefault() ? 'INF' : $argument->getDefault(),
-        );
+        ];
     }
 
     /**
@@ -119,7 +119,7 @@ class JsonDescriptor extends Descriptor
      */
     private function getInputOptionData(InputOption $option)
     {
-        return array(
+        return [
             'name' => '--'.$option->getName(),
             'shortcut' => $option->getShortcut() ? '-'.str_replace('|', '|-', $option->getShortcut()) : '',
             'accept_value' => $option->acceptValue(),
@@ -127,7 +127,7 @@ class JsonDescriptor extends Descriptor
             'is_multiple' => $option->isArray(),
             'description' => preg_replace('/\s*[\r\n]\s*/', ' ', $option->getDescription()),
             'default' => INF === $option->getDefault() ? 'INF' : $option->getDefault(),
-        );
+        ];
     }
 
     /**
@@ -135,17 +135,17 @@ class JsonDescriptor extends Descriptor
      */
     private function getInputDefinitionData(InputDefinition $definition)
     {
-        $inputArguments = array();
+        $inputArguments = [];
         foreach ($definition->getArguments() as $name => $argument) {
             $inputArguments[$name] = $this->getInputArgumentData($argument);
         }
 
-        $inputOptions = array();
+        $inputOptions = [];
         foreach ($definition->getOptions() as $name => $option) {
             $inputOptions[$name] = $this->getInputOptionData($option);
         }
 
-        return array('arguments' => $inputArguments, 'options' => $inputOptions);
+        return ['arguments' => $inputArguments, 'options' => $inputOptions];
     }
 
     /**
@@ -156,13 +156,13 @@ class JsonDescriptor extends Descriptor
         $command->getSynopsis();
         $command->mergeApplicationDefinition(false);
 
-        return array(
+        return [
             'name' => $command->getName(),
-            'usage' => array_merge(array($command->getSynopsis()), $command->getUsages(), $command->getAliases()),
+            'usage' => array_merge([$command->getSynopsis()], $command->getUsages(), $command->getAliases()),
             'description' => $command->getDescription(),
             'help' => $command->getProcessedHelp(),
             'definition' => $this->getInputDefinitionData($command->getNativeDefinition()),
             'hidden' => $command->isHidden(),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
index 6d8399f922..e6245778f5 100644
--- a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
@@ -31,7 +31,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = array())
+    public function describe(OutputInterface $output, $object, array $options = [])
     {
         $decorated = $output->isDecorated();
         $output->setDecorated(false);
@@ -52,7 +52,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputArgument(InputArgument $argument, array $options = array())
+    protected function describeInputArgument(InputArgument $argument, array $options = [])
     {
         $this->write(
             '#### `'.($argument->getName() ?: '<none>')."`\n\n"
@@ -66,7 +66,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputOption(InputOption $option, array $options = array())
+    protected function describeInputOption(InputOption $option, array $options = [])
     {
         $name = '--'.$option->getName();
         if ($option->getShortcut()) {
@@ -86,7 +86,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputDefinition(InputDefinition $definition, array $options = array())
+    protected function describeInputDefinition(InputDefinition $definition, array $options = [])
     {
         if ($showArguments = \count($definition->getArguments()) > 0) {
             $this->write('### Arguments');
@@ -112,7 +112,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCommand(Command $command, array $options = array())
+    protected function describeCommand(Command $command, array $options = [])
     {
         $command->getSynopsis();
         $command->mergeApplicationDefinition(false);
@@ -122,7 +122,7 @@ class MarkdownDescriptor extends Descriptor
             .str_repeat('-', Helper::strlen($command->getName()) + 2)."\n\n"
             .($command->getDescription() ? $command->getDescription()."\n\n" : '')
             .'### Usage'."\n\n"
-            .array_reduce(array_merge(array($command->getSynopsis()), $command->getAliases(), $command->getUsages()), function ($carry, $usage) {
+            .array_reduce(array_merge([$command->getSynopsis()], $command->getAliases(), $command->getUsages()), function ($carry, $usage) {
                 return $carry.'* `'.$usage.'`'."\n";
             })
         );
@@ -141,7 +141,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeApplication(Application $application, array $options = array())
+    protected function describeApplication(Application $application, array $options = [])
     {
         $describedNamespace = isset($options['namespace']) ? $options['namespace'] : null;
         $description = new ApplicationDescription($application, $describedNamespace);
diff --git a/src/Symfony/Component/Console/Descriptor/TextDescriptor.php b/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
index 9361b10986..24fcf00a18 100644
--- a/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/TextDescriptor.php
@@ -31,7 +31,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputArgument(InputArgument $argument, array $options = array())
+    protected function describeInputArgument(InputArgument $argument, array $options = [])
     {
         if (null !== $argument->getDefault() && (!\is_array($argument->getDefault()) || \count($argument->getDefault()))) {
             $default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($argument->getDefault()));
@@ -54,7 +54,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputOption(InputOption $option, array $options = array())
+    protected function describeInputOption(InputOption $option, array $options = [])
     {
         if ($option->acceptValue() && null !== $option->getDefault() && (!\is_array($option->getDefault()) || \count($option->getDefault()))) {
             $default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($option->getDefault()));
@@ -71,7 +71,7 @@ class TextDescriptor extends Descriptor
             }
         }
 
-        $totalWidth = isset($options['total_width']) ? $options['total_width'] : $this->calculateTotalWidthForOptions(array($option));
+        $totalWidth = isset($options['total_width']) ? $options['total_width'] : $this->calculateTotalWidthForOptions([$option]);
         $synopsis = sprintf('%s%s',
             $option->getShortcut() ? sprintf('-%s, ', $option->getShortcut()) : '    ',
             sprintf('--%s%s', $option->getName(), $value)
@@ -92,7 +92,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputDefinition(InputDefinition $definition, array $options = array())
+    protected function describeInputDefinition(InputDefinition $definition, array $options = [])
     {
         $totalWidth = $this->calculateTotalWidthForOptions($definition->getOptions());
         foreach ($definition->getArguments() as $argument) {
@@ -103,7 +103,7 @@ class TextDescriptor extends Descriptor
             $this->writeText('<comment>Arguments:</comment>', $options);
             $this->writeText("\n");
             foreach ($definition->getArguments() as $argument) {
-                $this->describeInputArgument($argument, array_merge($options, array('total_width' => $totalWidth)));
+                $this->describeInputArgument($argument, array_merge($options, ['total_width' => $totalWidth]));
                 $this->writeText("\n");
             }
         }
@@ -113,7 +113,7 @@ class TextDescriptor extends Descriptor
         }
 
         if ($definition->getOptions()) {
-            $laterOptions = array();
+            $laterOptions = [];
 
             $this->writeText('<comment>Options:</comment>', $options);
             foreach ($definition->getOptions() as $option) {
@@ -122,11 +122,11 @@ class TextDescriptor extends Descriptor
                     continue;
                 }
                 $this->writeText("\n");
-                $this->describeInputOption($option, array_merge($options, array('total_width' => $totalWidth)));
+                $this->describeInputOption($option, array_merge($options, ['total_width' => $totalWidth]));
             }
             foreach ($laterOptions as $option) {
                 $this->writeText("\n");
-                $this->describeInputOption($option, array_merge($options, array('total_width' => $totalWidth)));
+                $this->describeInputOption($option, array_merge($options, ['total_width' => $totalWidth]));
             }
         }
     }
@@ -134,7 +134,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCommand(Command $command, array $options = array())
+    protected function describeCommand(Command $command, array $options = [])
     {
         $command->getSynopsis(true);
         $command->getSynopsis(false);
@@ -148,7 +148,7 @@ class TextDescriptor extends Descriptor
         }
 
         $this->writeText('<comment>Usage:</comment>', $options);
-        foreach (array_merge(array($command->getSynopsis(true)), $command->getAliases(), $command->getUsages()) as $usage) {
+        foreach (array_merge([$command->getSynopsis(true)], $command->getAliases(), $command->getUsages()) as $usage) {
             $this->writeText("\n");
             $this->writeText('  '.OutputFormatter::escape($usage), $options);
         }
@@ -174,7 +174,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeApplication(Application $application, array $options = array())
+    protected function describeApplication(Application $application, array $options = [])
     {
         $describedNamespace = isset($options['namespace']) ? $options['namespace'] : null;
         $description = new ApplicationDescription($application, $describedNamespace);
@@ -250,7 +250,7 @@ class TextDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    private function writeText($content, array $options = array())
+    private function writeText($content, array $options = [])
     {
         $this->write(
             isset($options['raw_text']) && $options['raw_text'] ? strip_tags($content) : $content,
@@ -302,7 +302,7 @@ class TextDescriptor extends Descriptor
      */
     private function getColumnWidth(array $commands): int
     {
-        $widths = array();
+        $widths = [];
 
         foreach ($commands as $command) {
             if ($command instanceof Command) {
diff --git a/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php b/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
index d0c6abddb4..f5202a330b 100644
--- a/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/XmlDescriptor.php
@@ -64,7 +64,7 @@ class XmlDescriptor extends Descriptor
 
         $commandXML->appendChild($usagesXML = $dom->createElement('usages'));
 
-        foreach (array_merge(array($command->getSynopsis()), $command->getAliases(), $command->getUsages()) as $usage) {
+        foreach (array_merge([$command->getSynopsis()], $command->getAliases(), $command->getUsages()) as $usage) {
             $usagesXML->appendChild($dom->createElement('usage', $usage));
         }
 
@@ -130,7 +130,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputArgument(InputArgument $argument, array $options = array())
+    protected function describeInputArgument(InputArgument $argument, array $options = [])
     {
         $this->writeDocument($this->getInputArgumentDocument($argument));
     }
@@ -138,7 +138,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputOption(InputOption $option, array $options = array())
+    protected function describeInputOption(InputOption $option, array $options = [])
     {
         $this->writeDocument($this->getInputOptionDocument($option));
     }
@@ -146,7 +146,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeInputDefinition(InputDefinition $definition, array $options = array())
+    protected function describeInputDefinition(InputDefinition $definition, array $options = [])
     {
         $this->writeDocument($this->getInputDefinitionDocument($definition));
     }
@@ -154,7 +154,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeCommand(Command $command, array $options = array())
+    protected function describeCommand(Command $command, array $options = [])
     {
         $this->writeDocument($this->getCommandDocument($command));
     }
@@ -162,7 +162,7 @@ class XmlDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    protected function describeApplication(Application $application, array $options = array())
+    protected function describeApplication(Application $application, array $options = [])
     {
         $this->writeDocument($this->getApplicationDocument($application, isset($options['namespace']) ? $options['namespace'] : null));
     }
@@ -200,7 +200,7 @@ class XmlDescriptor extends Descriptor
         $descriptionXML->appendChild($dom->createTextNode($argument->getDescription()));
 
         $objectXML->appendChild($defaultsXML = $dom->createElement('defaults'));
-        $defaults = \is_array($argument->getDefault()) ? $argument->getDefault() : (\is_bool($argument->getDefault()) ? array(var_export($argument->getDefault(), true)) : ($argument->getDefault() ? array($argument->getDefault()) : array()));
+        $defaults = \is_array($argument->getDefault()) ? $argument->getDefault() : (\is_bool($argument->getDefault()) ? [var_export($argument->getDefault(), true)] : ($argument->getDefault() ? [$argument->getDefault()] : []));
         foreach ($defaults as $default) {
             $defaultsXML->appendChild($defaultXML = $dom->createElement('default'));
             $defaultXML->appendChild($dom->createTextNode($default));
@@ -229,7 +229,7 @@ class XmlDescriptor extends Descriptor
         $descriptionXML->appendChild($dom->createTextNode($option->getDescription()));
 
         if ($option->acceptValue()) {
-            $defaults = \is_array($option->getDefault()) ? $option->getDefault() : (\is_bool($option->getDefault()) ? array(var_export($option->getDefault(), true)) : ($option->getDefault() ? array($option->getDefault()) : array()));
+            $defaults = \is_array($option->getDefault()) ? $option->getDefault() : (\is_bool($option->getDefault()) ? [var_export($option->getDefault(), true)] : ($option->getDefault() ? [$option->getDefault()] : []));
             $objectXML->appendChild($defaultsXML = $dom->createElement('defaults'));
 
             if (!empty($defaults)) {
diff --git a/src/Symfony/Component/Console/EventListener/ErrorListener.php b/src/Symfony/Component/Console/EventListener/ErrorListener.php
index 909d6ea3a1..212ad1d96f 100644
--- a/src/Symfony/Component/Console/EventListener/ErrorListener.php
+++ b/src/Symfony/Component/Console/EventListener/ErrorListener.php
@@ -40,10 +40,10 @@ class ErrorListener implements EventSubscriberInterface
         $error = $event->getError();
 
         if (!$inputString = $this->getInputString($event)) {
-            return $this->logger->error('An error occurred while using the console. Message: "{message}"', array('exception' => $error, 'message' => $error->getMessage()));
+            return $this->logger->error('An error occurred while using the console. Message: "{message}"', ['exception' => $error, 'message' => $error->getMessage()]);
         }
 
-        $this->logger->error('Error thrown while running command "{command}". Message: "{message}"', array('exception' => $error, 'command' => $inputString, 'message' => $error->getMessage()));
+        $this->logger->error('Error thrown while running command "{command}". Message: "{message}"', ['exception' => $error, 'command' => $inputString, 'message' => $error->getMessage()]);
     }
 
     public function onConsoleTerminate(ConsoleTerminateEvent $event)
@@ -59,18 +59,18 @@ class ErrorListener implements EventSubscriberInterface
         }
 
         if (!$inputString = $this->getInputString($event)) {
-            return $this->logger->debug('The console exited with code "{code}"', array('code' => $exitCode));
+            return $this->logger->debug('The console exited with code "{code}"', ['code' => $exitCode]);
         }
 
-        $this->logger->debug('Command "{command}" exited with code "{code}"', array('command' => $inputString, 'code' => $exitCode));
+        $this->logger->debug('Command "{command}" exited with code "{code}"', ['command' => $inputString, 'code' => $exitCode]);
     }
 
     public static function getSubscribedEvents()
     {
-        return array(
-            ConsoleEvents::ERROR => array('onConsoleError', -128),
-            ConsoleEvents::TERMINATE => array('onConsoleTerminate', -128),
-        );
+        return [
+            ConsoleEvents::ERROR => ['onConsoleError', -128],
+            ConsoleEvents::TERMINATE => ['onConsoleTerminate', -128],
+        ];
     }
 
     private static function getInputString(ConsoleEvent $event)
@@ -80,7 +80,7 @@ class ErrorListener implements EventSubscriberInterface
 
         if (method_exists($input, '__toString')) {
             if ($commandName) {
-                return str_replace(array("'$commandName'", "\"$commandName\""), $commandName, (string) $input);
+                return str_replace(["'$commandName'", "\"$commandName\""], $commandName, (string) $input);
             }
 
             return (string) $input;
diff --git a/src/Symfony/Component/Console/Exception/CommandNotFoundException.php b/src/Symfony/Component/Console/Exception/CommandNotFoundException.php
index 2f6e644b99..15ac522c67 100644
--- a/src/Symfony/Component/Console/Exception/CommandNotFoundException.php
+++ b/src/Symfony/Component/Console/Exception/CommandNotFoundException.php
@@ -26,7 +26,7 @@ class CommandNotFoundException extends \InvalidArgumentException implements Exce
      * @param int        $code         Exception code
      * @param \Exception $previous     Previous exception used for the exception chaining
      */
-    public function __construct(string $message, array $alternatives = array(), int $code = 0, \Exception $previous = null)
+    public function __construct(string $message, array $alternatives = [], int $code = 0, \Exception $previous = null)
     {
         parent::__construct($message, $code, $previous);
 
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatter.php b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
index 4e4d3dfd36..815993fe31 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatter.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatter.php
@@ -22,7 +22,7 @@ use Symfony\Component\Console\Exception\InvalidArgumentException;
 class OutputFormatter implements WrappableOutputFormatterInterface
 {
     private $decorated;
-    private $styles = array();
+    private $styles = [];
     private $styleStack;
 
     /**
@@ -66,7 +66,7 @@ class OutputFormatter implements WrappableOutputFormatterInterface
      * @param bool                            $decorated Whether this formatter should actually decorate strings
      * @param OutputFormatterStyleInterface[] $styles    Array of "name => FormatterStyle" instances
      */
-    public function __construct(bool $decorated = false, array $styles = array())
+    public function __construct(bool $decorated = false, array $styles = [])
     {
         $this->decorated = $decorated;
 
@@ -178,7 +178,7 @@ class OutputFormatter implements WrappableOutputFormatterInterface
         $output .= $this->applyCurrentStyle(substr($message, $offset), $output, $width, $currentLineLength);
 
         if (false !== strpos($output, "\0")) {
-            return strtr($output, array("\0" => '\\', '\\<' => '<'));
+            return strtr($output, ["\0" => '\\', '\\<' => '<']);
         }
 
         return str_replace('\\<', '<', $output);
diff --git a/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php b/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
index 7ca93035b6..33f7d5222a 100644
--- a/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
+++ b/src/Symfony/Component/Console/Formatter/OutputFormatterStyleStack.php
@@ -37,7 +37,7 @@ class OutputFormatterStyleStack implements ResetInterface
      */
     public function reset()
     {
-        $this->styles = array();
+        $this->styles = [];
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php b/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
index f5393edee3..16d117553a 100644
--- a/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
+++ b/src/Symfony/Component/Console/Helper/DebugFormatterHelper.php
@@ -20,8 +20,8 @@ namespace Symfony\Component\Console\Helper;
  */
 class DebugFormatterHelper extends Helper
 {
-    private $colors = array('black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white', 'default');
-    private $started = array();
+    private $colors = ['black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white', 'default'];
+    private $started = [];
     private $count = -1;
 
     /**
@@ -35,7 +35,7 @@ class DebugFormatterHelper extends Helper
      */
     public function start($id, $message, $prefix = 'RUN')
     {
-        $this->started[$id] = array('border' => ++$this->count % \count($this->colors));
+        $this->started[$id] = ['border' => ++$this->count % \count($this->colors)];
 
         return sprintf("%s<bg=blue;fg=white> %s </> <fg=blue>%s</>\n", $this->getBorder($id), $prefix, $message);
     }
diff --git a/src/Symfony/Component/Console/Helper/DescriptorHelper.php b/src/Symfony/Component/Console/Helper/DescriptorHelper.php
index 54d3b1afc1..f8a3847b49 100644
--- a/src/Symfony/Component/Console/Helper/DescriptorHelper.php
+++ b/src/Symfony/Component/Console/Helper/DescriptorHelper.php
@@ -29,7 +29,7 @@ class DescriptorHelper extends Helper
     /**
      * @var DescriptorInterface[]
      */
-    private $descriptors = array();
+    private $descriptors = [];
 
     public function __construct()
     {
@@ -54,12 +54,12 @@ class DescriptorHelper extends Helper
      *
      * @throws InvalidArgumentException when the given format is not supported
      */
-    public function describe(OutputInterface $output, $object, array $options = array())
+    public function describe(OutputInterface $output, $object, array $options = [])
     {
-        $options = array_merge(array(
+        $options = array_merge([
             'raw_text' => false,
             'format' => 'txt',
-        ), $options);
+        ], $options);
 
         if (!isset($this->descriptors[$options['format']])) {
             throw new InvalidArgumentException(sprintf('Unsupported format "%s".', $options['format']));
diff --git a/src/Symfony/Component/Console/Helper/FormatterHelper.php b/src/Symfony/Component/Console/Helper/FormatterHelper.php
index 79ab2849e5..4ad63856dc 100644
--- a/src/Symfony/Component/Console/Helper/FormatterHelper.php
+++ b/src/Symfony/Component/Console/Helper/FormatterHelper.php
@@ -46,18 +46,18 @@ class FormatterHelper extends Helper
     public function formatBlock($messages, $style, $large = false)
     {
         if (!\is_array($messages)) {
-            $messages = array($messages);
+            $messages = [$messages];
         }
 
         $len = 0;
-        $lines = array();
+        $lines = [];
         foreach ($messages as $message) {
             $message = OutputFormatter::escape($message);
             $lines[] = sprintf($large ? '  %s  ' : ' %s ', $message);
             $len = max($this->strlen($message) + ($large ? 4 : 2), $len);
         }
 
-        $messages = $large ? array(str_repeat(' ', $len)) : array();
+        $messages = $large ? [str_repeat(' ', $len)] : [];
         for ($i = 0; isset($lines[$i]); ++$i) {
             $messages[] = $lines[$i].str_repeat(' ', $len - $this->strlen($lines[$i]));
         }
diff --git a/src/Symfony/Component/Console/Helper/Helper.php b/src/Symfony/Component/Console/Helper/Helper.php
index 5090185526..0ddddf6bc5 100644
--- a/src/Symfony/Component/Console/Helper/Helper.php
+++ b/src/Symfony/Component/Console/Helper/Helper.php
@@ -74,17 +74,17 @@ abstract class Helper implements HelperInterface
 
     public static function formatTime($secs)
     {
-        static $timeFormats = array(
-            array(0, '< 1 sec'),
-            array(1, '1 sec'),
-            array(2, 'secs', 1),
-            array(60, '1 min'),
-            array(120, 'mins', 60),
-            array(3600, '1 hr'),
-            array(7200, 'hrs', 3600),
-            array(86400, '1 day'),
-            array(172800, 'days', 86400),
-        );
+        static $timeFormats = [
+            [0, '< 1 sec'],
+            [1, '1 sec'],
+            [2, 'secs', 1],
+            [60, '1 min'],
+            [120, 'mins', 60],
+            [3600, '1 hr'],
+            [7200, 'hrs', 3600],
+            [86400, '1 day'],
+            [172800, 'days', 86400],
+        ];
 
         foreach ($timeFormats as $index => $format) {
             if ($secs >= $format[0]) {
diff --git a/src/Symfony/Component/Console/Helper/HelperSet.php b/src/Symfony/Component/Console/Helper/HelperSet.php
index 4c44b05f56..c73fecd475 100644
--- a/src/Symfony/Component/Console/Helper/HelperSet.php
+++ b/src/Symfony/Component/Console/Helper/HelperSet.php
@@ -24,13 +24,13 @@ class HelperSet implements \IteratorAggregate
     /**
      * @var Helper[]
      */
-    private $helpers = array();
+    private $helpers = [];
     private $command;
 
     /**
      * @param Helper[] $helpers An array of helper
      */
-    public function __construct(array $helpers = array())
+    public function __construct(array $helpers = [])
     {
         foreach ($helpers as $alias => $helper) {
             $this->set($helper, \is_int($alias) ? null : $alias);
diff --git a/src/Symfony/Component/Console/Helper/ProcessHelper.php b/src/Symfony/Component/Console/Helper/ProcessHelper.php
index f03774d35d..e3a7c77b35 100644
--- a/src/Symfony/Component/Console/Helper/ProcessHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProcessHelper.php
@@ -46,17 +46,17 @@ class ProcessHelper extends Helper
         $formatter = $this->getHelperSet()->get('debug_formatter');
 
         if ($cmd instanceof Process) {
-            $cmd = array($cmd);
+            $cmd = [$cmd];
         }
 
         if (!\is_array($cmd)) {
             @trigger_error(sprintf('Passing a command as a string to "%s()" is deprecated since Symfony 4.2, pass it the command as an array of arguments instead.', __METHOD__), E_USER_DEPRECATED);
-            $cmd = array(\method_exists(Process::class, 'fromShellCommandline') ? Process::fromShellCommandline($cmd) : new Process($cmd));
+            $cmd = [\method_exists(Process::class, 'fromShellCommandline') ? Process::fromShellCommandline($cmd) : new Process($cmd)];
         }
 
         if (\is_string($cmd[0] ?? null)) {
             $process = new Process($cmd);
-            $cmd = array();
+            $cmd = [];
         } elseif (($cmd[0] ?? null) instanceof Process) {
             $process = $cmd[0];
             unset($cmd[0]);
diff --git a/src/Symfony/Component/Console/Helper/ProgressBar.php b/src/Symfony/Component/Console/Helper/ProgressBar.php
index bef87d2b6a..b68d9fe389 100644
--- a/src/Symfony/Component/Console/Helper/ProgressBar.php
+++ b/src/Symfony/Component/Console/Helper/ProgressBar.php
@@ -39,7 +39,7 @@ final class ProgressBar
     private $stepWidth;
     private $percent = 0.0;
     private $formatLineCount;
-    private $messages = array();
+    private $messages = [];
     private $overwrite = true;
     private $terminal;
     private $firstRun = true;
@@ -419,8 +419,8 @@ final class ProgressBar
 
     private static function initPlaceholderFormatters(): array
     {
-        return array(
-            'bar' => function (ProgressBar $bar, OutputInterface $output) {
+        return [
+            'bar' => function (self $bar, OutputInterface $output) {
                 $completeBars = floor($bar->getMaxSteps() > 0 ? $bar->getProgressPercent() * $bar->getBarWidth() : $bar->getProgress() % $bar->getBarWidth());
                 $display = str_repeat($bar->getBarCharacter(), $completeBars);
                 if ($completeBars < $bar->getBarWidth()) {
@@ -430,10 +430,10 @@ final class ProgressBar
 
                 return $display;
             },
-            'elapsed' => function (ProgressBar $bar) {
+            'elapsed' => function (self $bar) {
                 return Helper::formatTime(time() - $bar->getStartTime());
             },
-            'remaining' => function (ProgressBar $bar) {
+            'remaining' => function (self $bar) {
                 if (!$bar->getMaxSteps()) {
                     throw new LogicException('Unable to display the remaining time if the maximum number of steps is not set.');
                 }
@@ -446,7 +446,7 @@ final class ProgressBar
 
                 return Helper::formatTime($remaining);
             },
-            'estimated' => function (ProgressBar $bar) {
+            'estimated' => function (self $bar) {
                 if (!$bar->getMaxSteps()) {
                     throw new LogicException('Unable to display the estimated time if the maximum number of steps is not set.');
                 }
@@ -459,24 +459,24 @@ final class ProgressBar
 
                 return Helper::formatTime($estimated);
             },
-            'memory' => function (ProgressBar $bar) {
+            'memory' => function (self $bar) {
                 return Helper::formatMemory(memory_get_usage(true));
             },
-            'current' => function (ProgressBar $bar) {
+            'current' => function (self $bar) {
                 return str_pad($bar->getProgress(), $bar->getStepWidth(), ' ', STR_PAD_LEFT);
             },
-            'max' => function (ProgressBar $bar) {
+            'max' => function (self $bar) {
                 return $bar->getMaxSteps();
             },
-            'percent' => function (ProgressBar $bar) {
+            'percent' => function (self $bar) {
                 return floor($bar->getProgressPercent() * 100);
             },
-        );
+        ];
     }
 
     private static function initFormats(): array
     {
-        return array(
+        return [
             'normal' => ' %current%/%max% [%bar%] %percent:3s%%',
             'normal_nomax' => ' %current% [%bar%]',
 
@@ -488,7 +488,7 @@ final class ProgressBar
 
             'debug' => ' %current%/%max% [%bar%] %percent:3s%% %elapsed:6s%/%estimated:-6s% %memory:6s%',
             'debug_nomax' => ' %current% [%bar%] %elapsed:6s% %memory:6s%',
-        );
+        ];
     }
 
     private function buildLine(): string
diff --git a/src/Symfony/Component/Console/Helper/ProgressIndicator.php b/src/Symfony/Component/Console/Helper/ProgressIndicator.php
index 4c12c326cb..301be27ea4 100644
--- a/src/Symfony/Component/Console/Helper/ProgressIndicator.php
+++ b/src/Symfony/Component/Console/Helper/ProgressIndicator.php
@@ -48,7 +48,7 @@ class ProgressIndicator
         }
 
         if (null === $indicatorValues) {
-            $indicatorValues = array('-', '\\', '|', '/');
+            $indicatorValues = ['-', '\\', '|', '/'];
         }
 
         $indicatorValues = array_values($indicatorValues);
@@ -237,25 +237,25 @@ class ProgressIndicator
 
     private static function initPlaceholderFormatters()
     {
-        return array(
-            'indicator' => function (ProgressIndicator $indicator) {
+        return [
+            'indicator' => function (self $indicator) {
                 return $indicator->indicatorValues[$indicator->indicatorCurrent % \count($indicator->indicatorValues)];
             },
-            'message' => function (ProgressIndicator $indicator) {
+            'message' => function (self $indicator) {
                 return $indicator->message;
             },
-            'elapsed' => function (ProgressIndicator $indicator) {
+            'elapsed' => function (self $indicator) {
                 return Helper::formatTime(time() - $indicator->startTime);
             },
             'memory' => function () {
                 return Helper::formatMemory(memory_get_usage(true));
             },
-        );
+        ];
     }
 
     private static function initFormats()
     {
-        return array(
+        return [
             'normal' => ' %indicator% %message%',
             'normal_no_ansi' => ' %message%',
 
@@ -264,6 +264,6 @@ class ProgressIndicator
 
             'very_verbose' => ' %indicator% %message% (%elapsed:6s%, %memory:6s%)',
             'very_verbose_no_ansi' => ' %message% (%elapsed:6s%, %memory:6s%)',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Console/Helper/QuestionHelper.php b/src/Symfony/Component/Console/Helper/QuestionHelper.php
index 59d3dab536..575c53458d 100644
--- a/src/Symfony/Component/Console/Helper/QuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/QuestionHelper.php
@@ -155,7 +155,7 @@ class QuestionHelper extends Helper
         $message = $question->getQuestion();
 
         if ($question instanceof ChoiceQuestion) {
-            $maxWidth = max(array_map(array($this, 'strlen'), array_keys($question->getChoices())));
+            $maxWidth = max(array_map([$this, 'strlen'], array_keys($question->getChoices())));
 
             $messages = (array) $question->getQuestion();
             foreach ($question->getChoices() as $key => $value) {
@@ -407,7 +407,7 @@ class QuestionHelper extends Helper
         if (file_exists('/usr/bin/env')) {
             // handle other OSs with bash/zsh/ksh/csh if available to hide the answer
             $test = "/usr/bin/env %s -c 'echo OK' 2> /dev/null";
-            foreach (array('bash', 'zsh', 'ksh', 'csh') as $sh) {
+            foreach (['bash', 'zsh', 'ksh', 'csh'] as $sh) {
                 if ('OK' === rtrim(shell_exec(sprintf($test, $sh)))) {
                     self::$shell = $sh;
                     break;
diff --git a/src/Symfony/Component/Console/Helper/Table.php b/src/Symfony/Component/Console/Helper/Table.php
index 14974529c4..99aa83d4c8 100644
--- a/src/Symfony/Component/Console/Helper/Table.php
+++ b/src/Symfony/Component/Console/Helper/Table.php
@@ -41,17 +41,17 @@ class Table
     /**
      * Table headers.
      */
-    private $headers = array();
+    private $headers = [];
 
     /**
      * Table rows.
      */
-    private $rows = array();
+    private $rows = [];
 
     /**
      * Column widths cache.
      */
-    private $effectiveColumnWidths = array();
+    private $effectiveColumnWidths = [];
 
     /**
      * Number of columns cache.
@@ -73,15 +73,15 @@ class Table
     /**
      * @var array
      */
-    private $columnStyles = array();
+    private $columnStyles = [];
 
     /**
      * User set column widths.
      *
      * @var array
      */
-    private $columnWidths = array();
-    private $columnMaxWidths = array();
+    private $columnWidths = [];
+    private $columnMaxWidths = [];
 
     private static $styles;
 
@@ -212,7 +212,7 @@ class Table
      */
     public function setColumnWidths(array $widths)
     {
-        $this->columnWidths = array();
+        $this->columnWidths = [];
         foreach ($widths as $index => $width) {
             $this->setColumnWidth($index, $width);
         }
@@ -243,7 +243,7 @@ class Table
     {
         $headers = array_values($headers);
         if (!empty($headers) && !\is_array($headers[0])) {
-            $headers = array($headers);
+            $headers = [$headers];
         }
 
         $this->headers = $headers;
@@ -253,7 +253,7 @@ class Table
 
     public function setRows(array $rows)
     {
-        $this->rows = array();
+        $this->rows = [];
 
         return $this->addRows($rows);
     }
@@ -339,7 +339,7 @@ class Table
      */
     public function render()
     {
-        $rows = array_merge($this->headers, array($divider = new TableSeparator()), $this->rows);
+        $rows = array_merge($this->headers, [$divider = new TableSeparator()], $this->rows);
         $this->calculateNumberOfColumns($rows);
 
         $rows = $this->buildTableRows($rows);
@@ -400,13 +400,13 @@ class Table
 
         $crossings = $this->style->getCrossingChars();
         if (self::SEPARATOR_MID === $type) {
-            list($horizontal, $leftChar, $midChar, $rightChar) = array($borders[2], $crossings[8], $crossings[0], $crossings[4]);
+            list($horizontal, $leftChar, $midChar, $rightChar) = [$borders[2], $crossings[8], $crossings[0], $crossings[4]];
         } elseif (self::SEPARATOR_TOP === $type) {
-            list($horizontal, $leftChar, $midChar, $rightChar) = array($borders[0], $crossings[1], $crossings[2], $crossings[3]);
+            list($horizontal, $leftChar, $midChar, $rightChar) = [$borders[0], $crossings[1], $crossings[2], $crossings[3]];
         } elseif (self::SEPARATOR_TOP_BOTTOM === $type) {
-            list($horizontal, $leftChar, $midChar, $rightChar) = array($borders[0], $crossings[9], $crossings[10], $crossings[11]);
+            list($horizontal, $leftChar, $midChar, $rightChar) = [$borders[0], $crossings[9], $crossings[10], $crossings[11]];
         } else {
-            list($horizontal, $leftChar, $midChar, $rightChar) = array($borders[0], $crossings[7], $crossings[6], $crossings[5]);
+            list($horizontal, $leftChar, $midChar, $rightChar) = [$borders[0], $crossings[7], $crossings[6], $crossings[5]];
         }
 
         $markup = $leftChar;
@@ -500,7 +500,7 @@ class Table
      */
     private function calculateNumberOfColumns($rows)
     {
-        $columns = array(0);
+        $columns = [0];
         foreach ($rows as $row) {
             if ($row instanceof TableSeparator) {
                 continue;
@@ -516,7 +516,7 @@ class Table
     {
         /** @var WrappableOutputFormatterInterface $formatter */
         $formatter = $this->output->getFormatter();
-        $unmergedRows = array();
+        $unmergedRows = [];
         for ($rowKey = 0; $rowKey < \count($rows); ++$rowKey) {
             $rows = $this->fillNextRows($rows, $rowKey);
 
@@ -531,7 +531,7 @@ class Table
                 $lines = explode("\n", str_replace("\n", "<fg=default;bg=default>\n</>", $cell));
                 foreach ($lines as $lineKey => $line) {
                     if ($cell instanceof TableCell) {
-                        $line = new TableCell($line, array('colspan' => $cell->getColspan()));
+                        $line = new TableCell($line, ['colspan' => $cell->getColspan()]);
                     }
                     if (0 === $lineKey) {
                         $rows[$rowKey][$column] = $line;
@@ -557,7 +557,7 @@ class Table
 
     private function calculateRowCount(): int
     {
-        $numberOfRows = \count(iterator_to_array($this->buildTableRows(array_merge($this->headers, array(new TableSeparator()), $this->rows))));
+        $numberOfRows = \count(iterator_to_array($this->buildTableRows(array_merge($this->headers, [new TableSeparator()], $this->rows))));
 
         if ($this->headers) {
             ++$numberOfRows; // Add row for header separator
@@ -575,27 +575,27 @@ class Table
      */
     private function fillNextRows(array $rows, int $line): array
     {
-        $unmergedRows = array();
+        $unmergedRows = [];
         foreach ($rows[$line] as $column => $cell) {
             if (null !== $cell && !$cell instanceof TableCell && !is_scalar($cell) && !(\is_object($cell) && method_exists($cell, '__toString'))) {
                 throw new InvalidArgumentException(sprintf('A cell must be a TableCell, a scalar or an object implementing __toString, %s given.', \gettype($cell)));
             }
             if ($cell instanceof TableCell && $cell->getRowspan() > 1) {
                 $nbLines = $cell->getRowspan() - 1;
-                $lines = array($cell);
+                $lines = [$cell];
                 if (strstr($cell, "\n")) {
                     $lines = explode("\n", str_replace("\n", "<fg=default;bg=default>\n</>", $cell));
                     $nbLines = \count($lines) > $nbLines ? substr_count($cell, "\n") : $nbLines;
 
-                    $rows[$line][$column] = new TableCell($lines[0], array('colspan' => $cell->getColspan()));
+                    $rows[$line][$column] = new TableCell($lines[0], ['colspan' => $cell->getColspan()]);
                     unset($lines[0]);
                 }
 
                 // create a two dimensional array (rowspan x colspan)
-                $unmergedRows = array_replace_recursive(array_fill($line + 1, $nbLines, array()), $unmergedRows);
+                $unmergedRows = array_replace_recursive(array_fill($line + 1, $nbLines, []), $unmergedRows);
                 foreach ($unmergedRows as $unmergedRowKey => $unmergedRow) {
                     $value = isset($lines[$unmergedRowKey - $line]) ? $lines[$unmergedRowKey - $line] : '';
-                    $unmergedRows[$unmergedRowKey][$column] = new TableCell($value, array('colspan' => $cell->getColspan()));
+                    $unmergedRows[$unmergedRowKey][$column] = new TableCell($value, ['colspan' => $cell->getColspan()]);
                     if ($nbLines === $unmergedRowKey - $line) {
                         break;
                     }
@@ -608,7 +608,7 @@ class Table
             if (isset($rows[$unmergedRowKey]) && \is_array($rows[$unmergedRowKey]) && ($this->getNumberOfColumns($rows[$unmergedRowKey]) + $this->getNumberOfColumns($unmergedRows[$unmergedRowKey]) <= $this->numberOfColumns)) {
                 foreach ($unmergedRow as $cellKey => $cell) {
                     // insert cell into row at cellKey position
-                    array_splice($rows[$unmergedRowKey], $cellKey, 0, array($cell));
+                    array_splice($rows[$unmergedRowKey], $cellKey, 0, [$cell]);
                 }
             } else {
                 $row = $this->copyRow($rows, $unmergedRowKey - 1);
@@ -617,7 +617,7 @@ class Table
                         $row[$column] = $unmergedRow[$column];
                     }
                 }
-                array_splice($rows, $unmergedRowKey, 0, array($row));
+                array_splice($rows, $unmergedRowKey, 0, [$row]);
             }
         }
 
@@ -629,7 +629,7 @@ class Table
      */
     private function fillCells($row)
     {
-        $newRow = array();
+        $newRow = [];
         foreach ($row as $column => $cell) {
             $newRow[] = $cell;
             if ($cell instanceof TableCell && $cell->getColspan() > 1) {
@@ -649,7 +649,7 @@ class Table
         foreach ($row as $cellKey => $cellValue) {
             $row[$cellKey] = '';
             if ($cellValue instanceof TableCell) {
-                $row[$cellKey] = new TableCell('', array('colspan' => $cellValue->getColspan()));
+                $row[$cellKey] = new TableCell('', ['colspan' => $cellValue->getColspan()]);
             }
         }
 
@@ -691,7 +691,7 @@ class Table
     private function calculateColumnsWidth(iterable $rows)
     {
         for ($column = 0; $column < $this->numberOfColumns; ++$column) {
-            $lengths = array();
+            $lengths = [];
             foreach ($rows as $row) {
                 if ($row instanceof TableSeparator) {
                     continue;
@@ -742,7 +742,7 @@ class Table
      */
     private function cleanup()
     {
-        $this->effectiveColumnWidths = array();
+        $this->effectiveColumnWidths = [];
         $this->numberOfColumns = null;
     }
 
@@ -783,14 +783,14 @@ class Table
             ->setCrossingChars('┼', '╔', '╤', '╗', '╢', '╝', '╧', '╚', '╟', '╠', '╪', '╣')
         ;
 
-        return array(
+        return [
             'default' => new TableStyle(),
             'borderless' => $borderless,
             'compact' => $compact,
             'symfony-style-guide' => $styleGuide,
             'box' => $box,
             'box-double' => $boxDouble,
-        );
+        ];
     }
 
     private function resolveStyle($name)
diff --git a/src/Symfony/Component/Console/Helper/TableCell.php b/src/Symfony/Component/Console/Helper/TableCell.php
index f800fb44e3..5b6af4a933 100644
--- a/src/Symfony/Component/Console/Helper/TableCell.php
+++ b/src/Symfony/Component/Console/Helper/TableCell.php
@@ -19,12 +19,12 @@ use Symfony\Component\Console\Exception\InvalidArgumentException;
 class TableCell
 {
     private $value;
-    private $options = array(
+    private $options = [
         'rowspan' => 1,
         'colspan' => 1,
-    );
+    ];
 
-    public function __construct(string $value = '', array $options = array())
+    public function __construct(string $value = '', array $options = [])
     {
         $this->value = $value;
 
diff --git a/src/Symfony/Component/Console/Helper/TableSeparator.php b/src/Symfony/Component/Console/Helper/TableSeparator.php
index c7b8dc9c22..e541c53156 100644
--- a/src/Symfony/Component/Console/Helper/TableSeparator.php
+++ b/src/Symfony/Component/Console/Helper/TableSeparator.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Console\Helper;
  */
 class TableSeparator extends TableCell
 {
-    public function __construct(array $options = array())
+    public function __construct(array $options = [])
     {
         parent::__construct('', $options);
     }
diff --git a/src/Symfony/Component/Console/Helper/TableStyle.php b/src/Symfony/Component/Console/Helper/TableStyle.php
index f8ecc2d985..02dd693c8f 100644
--- a/src/Symfony/Component/Console/Helper/TableStyle.php
+++ b/src/Symfony/Component/Console/Helper/TableStyle.php
@@ -194,12 +194,12 @@ class TableStyle
      */
     public function getBorderChars()
     {
-        return array(
+        return [
             $this->horizontalOutsideBorderChar,
             $this->verticalOutsideBorderChar,
             $this->horizontalInsideBorderChar,
             $this->verticalInsideBorderChar,
-        );
+        ];
     }
 
     /**
@@ -292,7 +292,7 @@ class TableStyle
      */
     public function getCrossingChars(): array
     {
-        return array(
+        return [
             $this->crossingChar,
             $this->crossingTopLeftChar,
             $this->crossingTopMidChar,
@@ -305,7 +305,7 @@ class TableStyle
             $this->crossingTopLeftBottomChar,
             $this->crossingTopMidBottomChar,
             $this->crossingTopRightBottomChar,
-        );
+        ];
     }
 
     /**
@@ -413,7 +413,7 @@ class TableStyle
      */
     public function setPadType($padType)
     {
-        if (!\in_array($padType, array(STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH), true)) {
+        if (!\in_array($padType, [STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH], true)) {
             throw new InvalidArgumentException('Invalid padding type. Expected one of (STR_PAD_LEFT, STR_PAD_RIGHT, STR_PAD_BOTH).');
         }
 
diff --git a/src/Symfony/Component/Console/Input/ArgvInput.php b/src/Symfony/Component/Console/Input/ArgvInput.php
index b459ae4749..85ff6f91d8 100644
--- a/src/Symfony/Component/Console/Input/ArgvInput.php
+++ b/src/Symfony/Component/Console/Input/ArgvInput.php
@@ -169,7 +169,7 @@ class ArgvInput extends Input
         // if input is expecting another argument, add it
         if ($this->definition->hasArgument($c)) {
             $arg = $this->definition->getArgument($c);
-            $this->arguments[$arg->getName()] = $arg->isArray() ? array($token) : $token;
+            $this->arguments[$arg->getName()] = $arg->isArray() ? [$token] : $token;
 
         // if last argument isArray(), append token to last argument
         } elseif ($this->definition->hasArgument($c - 1) && $this->definition->getArgument($c - 1)->isArray()) {
@@ -224,11 +224,11 @@ class ArgvInput extends Input
             throw new RuntimeException(sprintf('The "--%s" option does not accept a value.', $name));
         }
 
-        if (\in_array($value, array('', null), true) && $option->acceptValue() && \count($this->parsed)) {
+        if (\in_array($value, ['', null], true) && $option->acceptValue() && \count($this->parsed)) {
             // if option accepts an optional or mandatory argument
             // let's see if there is one provided
             $next = array_shift($this->parsed);
-            if ((isset($next[0]) && '-' !== $next[0]) || \in_array($next, array('', null), true)) {
+            if ((isset($next[0]) && '-' !== $next[0]) || \in_array($next, ['', null], true)) {
                 $value = $next;
             } else {
                 array_unshift($this->parsed, $next);
diff --git a/src/Symfony/Component/Console/Input/ArrayInput.php b/src/Symfony/Component/Console/Input/ArrayInput.php
index 8b6917fc7c..cf09ff45ec 100644
--- a/src/Symfony/Component/Console/Input/ArrayInput.php
+++ b/src/Symfony/Component/Console/Input/ArrayInput.php
@@ -19,7 +19,7 @@ use Symfony\Component\Console\Exception\InvalidOptionException;
  *
  * Usage:
  *
- *     $input = new ArrayInput(array('name' => 'foo', '--bar' => 'foobar'));
+ *     $input = new ArrayInput(['name' => 'foo', '--bar' => 'foobar']);
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
@@ -103,7 +103,7 @@ class ArrayInput extends Input
      */
     public function __toString()
     {
-        $params = array();
+        $params = [];
         foreach ($this->parameters as $param => $val) {
             if ($param && '-' === $param[0]) {
                 if (\is_array($val)) {
@@ -114,7 +114,7 @@ class ArrayInput extends Input
                     $params[] = $param.('' != $val ? '='.$this->escapeToken($val) : '');
                 }
             } else {
-                $params[] = \is_array($val) ? implode(' ', array_map(array($this, 'escapeToken'), $val)) : $this->escapeToken($val);
+                $params[] = \is_array($val) ? implode(' ', array_map([$this, 'escapeToken'], $val)) : $this->escapeToken($val);
             }
         }
 
diff --git a/src/Symfony/Component/Console/Input/Input.php b/src/Symfony/Component/Console/Input/Input.php
index fa5644d1fd..7a16e0ee4b 100644
--- a/src/Symfony/Component/Console/Input/Input.php
+++ b/src/Symfony/Component/Console/Input/Input.php
@@ -29,8 +29,8 @@ abstract class Input implements InputInterface, StreamableInputInterface
 {
     protected $definition;
     protected $stream;
-    protected $options = array();
-    protected $arguments = array();
+    protected $options = [];
+    protected $arguments = [];
     protected $interactive = true;
 
     public function __construct(InputDefinition $definition = null)
@@ -48,8 +48,8 @@ abstract class Input implements InputInterface, StreamableInputInterface
      */
     public function bind(InputDefinition $definition)
     {
-        $this->arguments = array();
-        $this->options = array();
+        $this->arguments = [];
+        $this->options = [];
         $this->definition = $definition;
 
         $this->parse();
diff --git a/src/Symfony/Component/Console/Input/InputArgument.php b/src/Symfony/Component/Console/Input/InputArgument.php
index 94e82f0b86..b6aa6452a0 100644
--- a/src/Symfony/Component/Console/Input/InputArgument.php
+++ b/src/Symfony/Component/Console/Input/InputArgument.php
@@ -98,7 +98,7 @@ class InputArgument
 
         if ($this->isArray()) {
             if (null === $default) {
-                $default = array();
+                $default = [];
             } elseif (!\is_array($default)) {
                 throw new LogicException('A default value for an array argument must be an array.');
             }
diff --git a/src/Symfony/Component/Console/Input/InputDefinition.php b/src/Symfony/Component/Console/Input/InputDefinition.php
index 21fc67df2f..c7e5c987e5 100644
--- a/src/Symfony/Component/Console/Input/InputDefinition.php
+++ b/src/Symfony/Component/Console/Input/InputDefinition.php
@@ -19,10 +19,10 @@ use Symfony\Component\Console\Exception\LogicException;
  *
  * Usage:
  *
- *     $definition = new InputDefinition(array(
+ *     $definition = new InputDefinition([
  *         new InputArgument('name', InputArgument::REQUIRED),
  *         new InputOption('foo', 'f', InputOption::VALUE_REQUIRED),
- *     ));
+ *     ]);
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
@@ -38,7 +38,7 @@ class InputDefinition
     /**
      * @param array $definition An array of InputArgument and InputOption instance
      */
-    public function __construct(array $definition = array())
+    public function __construct(array $definition = [])
     {
         $this->setDefinition($definition);
     }
@@ -48,8 +48,8 @@ class InputDefinition
      */
     public function setDefinition(array $definition)
     {
-        $arguments = array();
-        $options = array();
+        $arguments = [];
+        $options = [];
         foreach ($definition as $item) {
             if ($item instanceof InputOption) {
                 $options[] = $item;
@@ -67,9 +67,9 @@ class InputDefinition
      *
      * @param InputArgument[] $arguments An array of InputArgument objects
      */
-    public function setArguments($arguments = array())
+    public function setArguments($arguments = [])
     {
-        $this->arguments = array();
+        $this->arguments = [];
         $this->requiredCount = 0;
         $this->hasOptional = false;
         $this->hasAnArrayArgument = false;
@@ -81,7 +81,7 @@ class InputDefinition
      *
      * @param InputArgument[] $arguments An array of InputArgument objects
      */
-    public function addArguments($arguments = array())
+    public function addArguments($arguments = [])
     {
         if (null !== $arguments) {
             foreach ($arguments as $argument) {
@@ -191,7 +191,7 @@ class InputDefinition
      */
     public function getArgumentDefaults()
     {
-        $values = array();
+        $values = [];
         foreach ($this->arguments as $argument) {
             $values[$argument->getName()] = $argument->getDefault();
         }
@@ -204,10 +204,10 @@ class InputDefinition
      *
      * @param InputOption[] $options An array of InputOption objects
      */
-    public function setOptions($options = array())
+    public function setOptions($options = [])
     {
-        $this->options = array();
-        $this->shortcuts = array();
+        $this->options = [];
+        $this->shortcuts = [];
         $this->addOptions($options);
     }
 
@@ -216,7 +216,7 @@ class InputDefinition
      *
      * @param InputOption[] $options An array of InputOption objects
      */
-    public function addOptions($options = array())
+    public function addOptions($options = [])
     {
         foreach ($options as $option) {
             $this->addOption($option);
@@ -322,7 +322,7 @@ class InputDefinition
      */
     public function getOptionDefaults()
     {
-        $values = array();
+        $values = [];
         foreach ($this->options as $option) {
             $values[$option->getName()] = $option->getDefault();
         }
@@ -357,7 +357,7 @@ class InputDefinition
      */
     public function getSynopsis($short = false)
     {
-        $elements = array();
+        $elements = [];
 
         if ($short && $this->getOptions()) {
             $elements[] = '[options]';
diff --git a/src/Symfony/Component/Console/Input/InputOption.php b/src/Symfony/Component/Console/Input/InputOption.php
index 67825cb11e..d62e0aea02 100644
--- a/src/Symfony/Component/Console/Input/InputOption.php
+++ b/src/Symfony/Component/Console/Input/InputOption.php
@@ -161,7 +161,7 @@ class InputOption
 
         if ($this->isArray()) {
             if (null === $default) {
-                $default = array();
+                $default = [];
             } elseif (!\is_array($default)) {
                 throw new LogicException('A default value for an array option must be an array.');
             }
diff --git a/src/Symfony/Component/Console/Input/StringInput.php b/src/Symfony/Component/Console/Input/StringInput.php
index 61e29481a4..0c63ed0e0e 100644
--- a/src/Symfony/Component/Console/Input/StringInput.php
+++ b/src/Symfony/Component/Console/Input/StringInput.php
@@ -32,7 +32,7 @@ class StringInput extends ArgvInput
      */
     public function __construct(string $input)
     {
-        parent::__construct(array());
+        parent::__construct([]);
 
         $this->setTokens($this->tokenize($input));
     }
@@ -48,13 +48,13 @@ class StringInput extends ArgvInput
      */
     private function tokenize($input)
     {
-        $tokens = array();
+        $tokens = [];
         $length = \strlen($input);
         $cursor = 0;
         while ($cursor < $length) {
             if (preg_match('/\s+/A', $input, $match, null, $cursor)) {
             } elseif (preg_match('/([^="\'\s]+?)(=?)('.self::REGEX_QUOTED_STRING.'+)/A', $input, $match, null, $cursor)) {
-                $tokens[] = $match[1].$match[2].stripcslashes(str_replace(array('"\'', '\'"', '\'\'', '""'), '', substr($match[3], 1, \strlen($match[3]) - 2)));
+                $tokens[] = $match[1].$match[2].stripcslashes(str_replace(['"\'', '\'"', '\'\'', '""'], '', substr($match[3], 1, \strlen($match[3]) - 2)));
             } elseif (preg_match('/'.self::REGEX_QUOTED_STRING.'/A', $input, $match, null, $cursor)) {
                 $tokens[] = stripcslashes(substr($match[0], 1, \strlen($match[0]) - 2));
             } elseif (preg_match('/'.self::REGEX_STRING.'/A', $input, $match, null, $cursor)) {
diff --git a/src/Symfony/Component/Console/Logger/ConsoleLogger.php b/src/Symfony/Component/Console/Logger/ConsoleLogger.php
index 0f7d551a62..36f3b99fa7 100644
--- a/src/Symfony/Component/Console/Logger/ConsoleLogger.php
+++ b/src/Symfony/Component/Console/Logger/ConsoleLogger.php
@@ -30,7 +30,7 @@ class ConsoleLogger extends AbstractLogger
     const ERROR = 'error';
 
     private $output;
-    private $verbosityLevelMap = array(
+    private $verbosityLevelMap = [
         LogLevel::EMERGENCY => OutputInterface::VERBOSITY_NORMAL,
         LogLevel::ALERT => OutputInterface::VERBOSITY_NORMAL,
         LogLevel::CRITICAL => OutputInterface::VERBOSITY_NORMAL,
@@ -39,8 +39,8 @@ class ConsoleLogger extends AbstractLogger
         LogLevel::NOTICE => OutputInterface::VERBOSITY_VERBOSE,
         LogLevel::INFO => OutputInterface::VERBOSITY_VERY_VERBOSE,
         LogLevel::DEBUG => OutputInterface::VERBOSITY_DEBUG,
-    );
-    private $formatLevelMap = array(
+    ];
+    private $formatLevelMap = [
         LogLevel::EMERGENCY => self::ERROR,
         LogLevel::ALERT => self::ERROR,
         LogLevel::CRITICAL => self::ERROR,
@@ -49,10 +49,10 @@ class ConsoleLogger extends AbstractLogger
         LogLevel::NOTICE => self::INFO,
         LogLevel::INFO => self::INFO,
         LogLevel::DEBUG => self::INFO,
-    );
+    ];
     private $errored = false;
 
-    public function __construct(OutputInterface $output, array $verbosityLevelMap = array(), array $formatLevelMap = array())
+    public function __construct(OutputInterface $output, array $verbosityLevelMap = [], array $formatLevelMap = [])
     {
         $this->output = $output;
         $this->verbosityLevelMap = $verbosityLevelMap + $this->verbosityLevelMap;
@@ -62,7 +62,7 @@ class ConsoleLogger extends AbstractLogger
     /**
      * {@inheritdoc}
      */
-    public function log($level, $message, array $context = array())
+    public function log($level, $message, array $context = [])
     {
         if (!isset($this->verbosityLevelMap[$level])) {
             throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $level));
@@ -106,7 +106,7 @@ class ConsoleLogger extends AbstractLogger
             return $message;
         }
 
-        $replacements = array();
+        $replacements = [];
         foreach ($context as $key => $val) {
             if (null === $val || is_scalar($val) || (\is_object($val) && method_exists($val, '__toString'))) {
                 $replacements["{{$key}}"] = $val;
diff --git a/src/Symfony/Component/Console/Output/ConsoleOutput.php b/src/Symfony/Component/Console/Output/ConsoleOutput.php
index e106d4f244..8430c9c82f 100644
--- a/src/Symfony/Component/Console/Output/ConsoleOutput.php
+++ b/src/Symfony/Component/Console/Output/ConsoleOutput.php
@@ -30,7 +30,7 @@ use Symfony\Component\Console\Formatter\OutputFormatterInterface;
 class ConsoleOutput extends StreamOutput implements ConsoleOutputInterface
 {
     private $stderr;
-    private $consoleSectionOutputs = array();
+    private $consoleSectionOutputs = [];
 
     /**
      * @param int                           $verbosity The verbosity level (one of the VERBOSITY constants in OutputInterface)
@@ -130,11 +130,11 @@ class ConsoleOutput extends StreamOutput implements ConsoleOutputInterface
      */
     private function isRunningOS400()
     {
-        $checks = array(
+        $checks = [
             \function_exists('php_uname') ? php_uname('s') : '',
             getenv('OSTYPE'),
             PHP_OS,
-        );
+        ];
 
         return false !== stripos(implode(';', $checks), 'OS400');
     }
diff --git a/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php b/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
index d7e1685baa..4ada2e8673 100644
--- a/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
+++ b/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
@@ -21,7 +21,7 @@ use Symfony\Component\Console\Terminal;
  */
 class ConsoleSectionOutput extends StreamOutput
 {
-    private $content = array();
+    private $content = [];
     private $lines = 0;
     private $sections;
     private $terminal;
@@ -53,7 +53,7 @@ class ConsoleSectionOutput extends StreamOutput
             \array_splice($this->content, -($lines * 2)); // Multiply lines by 2 to cater for each new line added between content
         } else {
             $lines = $this->lines;
-            $this->content = array();
+            $this->content = [];
         }
 
         $this->lines -= $lines;
@@ -113,7 +113,7 @@ class ConsoleSectionOutput extends StreamOutput
     private function popStreamContentUntilCurrentSection(int $numberOfLinesToClearFromCurrentSection = 0): string
     {
         $numberOfLinesToClear = $numberOfLinesToClearFromCurrentSection;
-        $erasedContent = array();
+        $erasedContent = [];
 
         foreach ($this->sections as $section) {
             if ($section === $this) {
diff --git a/src/Symfony/Component/Console/Output/Output.php b/src/Symfony/Component/Console/Output/Output.php
index 00852e28ed..9dd765113c 100644
--- a/src/Symfony/Component/Console/Output/Output.php
+++ b/src/Symfony/Component/Console/Output/Output.php
@@ -138,7 +138,7 @@ abstract class Output implements OutputInterface
     public function write($messages, $newline = false, $options = self::OUTPUT_NORMAL)
     {
         if (!is_iterable($messages)) {
-            $messages = array($messages);
+            $messages = [$messages];
         }
 
         $types = self::OUTPUT_NORMAL | self::OUTPUT_RAW | self::OUTPUT_PLAIN;
diff --git a/src/Symfony/Component/Console/Question/ChoiceQuestion.php b/src/Symfony/Component/Console/Question/ChoiceQuestion.php
index 4aa6f67266..612e406a8e 100644
--- a/src/Symfony/Component/Console/Question/ChoiceQuestion.php
+++ b/src/Symfony/Component/Console/Question/ChoiceQuestion.php
@@ -139,12 +139,12 @@ class ChoiceQuestion extends Question
                 }
                 $selectedChoices = explode(',', $selectedChoices);
             } else {
-                $selectedChoices = array($selected);
+                $selectedChoices = [$selected];
             }
 
-            $multiselectChoices = array();
+            $multiselectChoices = [];
             foreach ($selectedChoices as $value) {
-                $results = array();
+                $results = [];
                 foreach ($choices as $key => $choice) {
                     if ($choice === $value) {
                         $results[] = $key;
diff --git a/src/Symfony/Component/Console/Style/SymfonyStyle.php b/src/Symfony/Component/Console/Style/SymfonyStyle.php
index eb56a1f7e9..b46162de68 100644
--- a/src/Symfony/Component/Console/Style/SymfonyStyle.php
+++ b/src/Symfony/Component/Console/Style/SymfonyStyle.php
@@ -63,7 +63,7 @@ class SymfonyStyle extends OutputStyle
      */
     public function block($messages, $type = null, $style = null, $prefix = ' ', $padding = false, $escape = true)
     {
-        $messages = \is_array($messages) ? array_values($messages) : array($messages);
+        $messages = \is_array($messages) ? array_values($messages) : [$messages];
 
         $this->autoPrependBlock();
         $this->writeln($this->createBlock($messages, $type, $style, $prefix, $padding, $escape));
@@ -76,10 +76,10 @@ class SymfonyStyle extends OutputStyle
     public function title($message)
     {
         $this->autoPrependBlock();
-        $this->writeln(array(
+        $this->writeln([
             sprintf('<comment>%s</>', OutputFormatter::escapeTrailingBackslash($message)),
             sprintf('<comment>%s</>', str_repeat('=', Helper::strlenWithoutDecoration($this->getFormatter(), $message))),
-        ));
+        ]);
         $this->newLine();
     }
 
@@ -89,10 +89,10 @@ class SymfonyStyle extends OutputStyle
     public function section($message)
     {
         $this->autoPrependBlock();
-        $this->writeln(array(
+        $this->writeln([
             sprintf('<comment>%s</>', OutputFormatter::escapeTrailingBackslash($message)),
             sprintf('<comment>%s</>', str_repeat('-', Helper::strlenWithoutDecoration($this->getFormatter(), $message))),
-        ));
+        ]);
         $this->newLine();
     }
 
@@ -117,7 +117,7 @@ class SymfonyStyle extends OutputStyle
     {
         $this->autoPrependText();
 
-        $messages = \is_array($message) ? array_values($message) : array($message);
+        $messages = \is_array($message) ? array_values($message) : [$message];
         foreach ($messages as $message) {
             $this->writeln(sprintf(' %s', $message));
         }
@@ -307,7 +307,7 @@ class SymfonyStyle extends OutputStyle
     public function writeln($messages, $type = self::OUTPUT_NORMAL)
     {
         if (!is_iterable($messages)) {
-            $messages = array($messages);
+            $messages = [$messages];
         }
 
         foreach ($messages as $message) {
@@ -322,7 +322,7 @@ class SymfonyStyle extends OutputStyle
     public function write($messages, $newline = false, $type = self::OUTPUT_NORMAL)
     {
         if (!is_iterable($messages)) {
-            $messages = array($messages);
+            $messages = [$messages];
         }
 
         foreach ($messages as $message) {
@@ -392,7 +392,7 @@ class SymfonyStyle extends OutputStyle
     {
         $indentLength = 0;
         $prefixLength = Helper::strlenWithoutDecoration($this->getFormatter(), $prefix);
-        $lines = array();
+        $lines = [];
 
         if (null !== $type) {
             $type = sprintf('[%s] ', $type);
diff --git a/src/Symfony/Component/Console/Terminal.php b/src/Symfony/Component/Console/Terminal.php
index 3930ca0cdc..456cca11ca 100644
--- a/src/Symfony/Component/Console/Terminal.php
+++ b/src/Symfony/Component/Console/Terminal.php
@@ -91,11 +91,11 @@ class Terminal
             return;
         }
 
-        $descriptorspec = array(
-            1 => array('pipe', 'w'),
-            2 => array('pipe', 'w'),
-        );
-        $process = proc_open('mode CON', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
+        $descriptorspec = [
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ];
+        $process = proc_open('mode CON', $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
         if (\is_resource($process)) {
             $info = stream_get_contents($pipes[1]);
             fclose($pipes[1]);
@@ -103,7 +103,7 @@ class Terminal
             proc_close($process);
 
             if (preg_match('/--------+\r?\n.+?(\d+)\r?\n.+?(\d+)\r?\n/', $info, $matches)) {
-                return array((int) $matches[2], (int) $matches[1]);
+                return [(int) $matches[2], (int) $matches[1]];
             }
         }
     }
@@ -119,12 +119,12 @@ class Terminal
             return;
         }
 
-        $descriptorspec = array(
-            1 => array('pipe', 'w'),
-            2 => array('pipe', 'w'),
-        );
+        $descriptorspec = [
+            1 => ['pipe', 'w'],
+            2 => ['pipe', 'w'],
+        ];
 
-        $process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, array('suppress_errors' => true));
+        $process = proc_open('stty -a | grep columns', $descriptorspec, $pipes, null, null, ['suppress_errors' => true]);
         if (\is_resource($process)) {
             $info = stream_get_contents($pipes[1]);
             fclose($pipes[1]);
diff --git a/src/Symfony/Component/Console/Tester/ApplicationTester.php b/src/Symfony/Component/Console/Tester/ApplicationTester.php
index 24976f0896..ced56cff20 100644
--- a/src/Symfony/Component/Console/Tester/ApplicationTester.php
+++ b/src/Symfony/Component/Console/Tester/ApplicationTester.php
@@ -52,7 +52,7 @@ class ApplicationTester
      *
      * @return int The command exit code
      */
-    public function run(array $input, $options = array())
+    public function run(array $input, $options = [])
     {
         $this->input = new ArrayInput($input);
         if (isset($options['interactive'])) {
diff --git a/src/Symfony/Component/Console/Tester/CommandTester.php b/src/Symfony/Component/Console/Tester/CommandTester.php
index c5b178f2a7..da51559fad 100644
--- a/src/Symfony/Component/Console/Tester/CommandTester.php
+++ b/src/Symfony/Component/Console/Tester/CommandTester.php
@@ -48,7 +48,7 @@ class CommandTester
      *
      * @return int The command exit code
      */
-    public function execute(array $input, array $options = array())
+    public function execute(array $input, array $options = [])
     {
         // set the command name automatically if the application requires
         // this argument and no command name was passed
@@ -56,7 +56,7 @@ class CommandTester
             && (null !== $application = $this->command->getApplication())
             && $application->getDefinition()->hasArgument('command')
         ) {
-            $input = array_merge(array('command' => $this->command->getName()), $input);
+            $input = array_merge(['command' => $this->command->getName()], $input);
         }
 
         $this->input = new ArrayInput($input);
diff --git a/src/Symfony/Component/Console/Tester/TesterTrait.php b/src/Symfony/Component/Console/Tester/TesterTrait.php
index b66972cae5..e5df56d835 100644
--- a/src/Symfony/Component/Console/Tester/TesterTrait.php
+++ b/src/Symfony/Component/Console/Tester/TesterTrait.php
@@ -23,7 +23,7 @@ trait TesterTrait
 {
     /** @var StreamOutput */
     private $output;
-    private $inputs = array();
+    private $inputs = [];
     private $captureStreamsIndependently = false;
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/ApplicationTest.php b/src/Symfony/Component/Console/Tests/ApplicationTest.php
index b7b54f858e..2aaf9d7dae 100644
--- a/src/Symfony/Component/Console/Tests/ApplicationTest.php
+++ b/src/Symfony/Component/Console/Tests/ApplicationTest.php
@@ -84,7 +84,7 @@ class ApplicationTest extends TestCase
         $application = new Application('foo', 'bar');
         $this->assertEquals('foo', $application->getName(), '__construct() takes the application name as its first argument');
         $this->assertEquals('bar', $application->getVersion(), '__construct() takes the application version as its second argument');
-        $this->assertEquals(array('help', 'list'), array_keys($application->all()), '__construct() registered the help and list commands by default');
+        $this->assertEquals(['help', 'list'], array_keys($application->all()), '__construct() registered the help and list commands by default');
     }
 
     public function testSetGetName()
@@ -134,9 +134,9 @@ class ApplicationTest extends TestCase
         $commands = $application->all('foo');
         $this->assertCount(1, $commands, '->all() takes a namespace as its first argument');
 
-        $application->setCommandLoader(new FactoryCommandLoader(array(
+        $application->setCommandLoader(new FactoryCommandLoader([
             'foo:bar1' => function () { return new \Foo1Command(); },
-        )));
+        ]));
         $commands = $application->all('foo');
         $this->assertCount(2, $commands, '->all() takes a namespace as its first argument');
         $this->assertInstanceOf(\FooCommand::class, $commands['foo:bar'], '->all() returns the registered commands');
@@ -158,9 +158,9 @@ class ApplicationTest extends TestCase
         $this->assertEquals($foo, $commands['foo:bar'], '->add() registers a command');
 
         $application = new Application();
-        $application->addCommands(array($foo = new \FooCommand(), $foo1 = new \Foo1Command()));
+        $application->addCommands([$foo = new \FooCommand(), $foo1 = new \Foo1Command()]);
         $commands = $application->all();
-        $this->assertEquals(array($foo, $foo1), array($commands['foo:bar'], $commands['foo:bar1']), '->addCommands() registers an array of commands');
+        $this->assertEquals([$foo, $foo1], [$commands['foo:bar'], $commands['foo:bar1']], '->addCommands() registers an array of commands');
     }
 
     /**
@@ -206,9 +206,9 @@ class ApplicationTest extends TestCase
         $this->assertEquals($foo, $application->get('foo:bar'), '->get() returns a command by name');
         $this->assertEquals($foo, $application->get('afoobar'), '->get() returns a command by alias');
 
-        $application->setCommandLoader(new FactoryCommandLoader(array(
+        $application->setCommandLoader(new FactoryCommandLoader([
             'foo:bar1' => function () { return new \Foo1Command(); },
-        )));
+        ]));
 
         $this->assertTrue($application->has('afoobar'), '->has() returns true if an instance is registered for an alias even with command loader');
         $this->assertEquals($foo, $application->get('foo:bar'), '->get() returns an instance by name even with command loader');
@@ -226,7 +226,7 @@ class ApplicationTest extends TestCase
         $application->setCatchExceptions(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('-h' => true, '-q' => true), array('decorated' => false));
+        $tester->run(['-h' => true, '-q' => true], ['decorated' => false]);
 
         $this->assertEmpty($tester->getDisplay(true));
     }
@@ -246,7 +246,7 @@ class ApplicationTest extends TestCase
         $application = new Application();
         $application->add(new \FooCommand());
         $application->add(new \Foo1Command());
-        $this->assertEquals(array('foo'), $application->getNamespaces(), '->getNamespaces() returns an array of unique used namespaces');
+        $this->assertEquals(['foo'], $application->getNamespaces(), '->getNamespaces() returns an array of unique used namespaces');
     }
 
     public function testFindNamespace()
@@ -368,9 +368,9 @@ class ApplicationTest extends TestCase
     public function testFindWithCommandLoader()
     {
         $application = new Application();
-        $application->setCommandLoader(new FactoryCommandLoader(array(
+        $application->setCommandLoader(new FactoryCommandLoader([
             'foo:bar' => $f = function () { return new \FooCommand(); },
-        )));
+        ]));
 
         $this->assertInstanceOf('FooCommand', $application->find('foo:bar'), '->find() returns a command if its name exists');
         $this->assertInstanceOf('Symfony\Component\Console\Command\HelpCommand', $application->find('h'), '->find() returns a command if its name exists');
@@ -401,23 +401,23 @@ class ApplicationTest extends TestCase
 
     public function provideAmbiguousAbbreviations()
     {
-        return array(
-            array('f', 'Command "f" is not defined.'),
-            array(
+        return [
+            ['f', 'Command "f" is not defined.'],
+            [
                 'a',
                 "Command \"a\" is ambiguous.\nDid you mean one of these?\n".
                 "    afoobar  The foo:bar command\n".
                 "    afoobar1 The foo:bar1 command\n".
                 '    afoobar2 The foo1:bar command',
-            ),
-            array(
+            ],
+            [
                 'foo:b',
                 "Command \"foo:b\" is ambiguous.\nDid you mean one of these?\n".
                 "    foo:bar  The foo:bar command\n".
                 "    foo:bar1 The foo:bar1 command\n".
                 '    foo1:bar The foo1:bar command',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testFindCommandEqualNamespace()
@@ -465,7 +465,7 @@ class ApplicationTest extends TestCase
         $application->add(new \Foo1Command());
         $application->setAutoExit(false);
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foos:bar1'), array('decorated' => false));
+        $tester->run(['command' => 'foos:bar1'], ['decorated' => false]);
         $this->assertSame('
                                                           
   There are no commands defined in the "foos" namespace.  
@@ -483,8 +483,8 @@ class ApplicationTest extends TestCase
         $application->add(new \FooWithoutAliasCommand());
         $application->setAutoExit(false);
         $tester = new ApplicationTester($application);
-        $tester->setInputs(array('y'));
-        $tester->run(array('command' => 'foos'), array('decorated' => false));
+        $tester->setInputs(['y']);
+        $tester->run(['command' => 'foos'], ['decorated' => false]);
         $display = trim($tester->getDisplay(true));
         $this->assertContains('Command "foos" is not defined', $display);
         $this->assertContains('Do you want to run "foo" instead?  (yes/no) [no]:', $display);
@@ -497,8 +497,8 @@ class ApplicationTest extends TestCase
         $application->add(new \FooWithoutAliasCommand());
         $application->setAutoExit(false);
         $tester = new ApplicationTester($application);
-        $tester->setInputs(array('n'));
-        $exitCode = $tester->run(array('command' => 'foos'), array('decorated' => false));
+        $tester->setInputs(['n']);
+        $exitCode = $tester->run(['command' => 'foos'], ['decorated' => false]);
         $this->assertSame(1, $exitCode);
         $display = trim($tester->getDisplay(true));
         $this->assertContains('Command "foos" is not defined', $display);
@@ -507,10 +507,10 @@ class ApplicationTest extends TestCase
 
     public function provideInvalidCommandNamesSingle()
     {
-        return array(
-            array('foo3:barr'),
-            array('fooo3:bar'),
-        );
+        return [
+            ['foo3:barr'],
+            ['fooo3:bar'],
+        ];
     }
 
     public function testFindAlternativeExceptionMessageMultiple()
@@ -568,7 +568,7 @@ class ApplicationTest extends TestCase
             $this->fail('->find() throws a CommandNotFoundException if command does not exist');
         } catch (\Exception $e) {
             $this->assertInstanceOf('Symfony\Component\Console\Exception\CommandNotFoundException', $e, '->find() throws a CommandNotFoundException if command does not exist');
-            $this->assertSame(array(), $e->getAlternatives());
+            $this->assertSame([], $e->getAlternatives());
             $this->assertEquals(sprintf('Command "%s" is not defined.', $commandName), $e->getMessage(), '->find() throws a CommandNotFoundException if command does not exist, without alternatives');
         }
 
@@ -579,7 +579,7 @@ class ApplicationTest extends TestCase
             $this->fail('->find() throws a CommandNotFoundException if command does not exist');
         } catch (\Exception $e) {
             $this->assertInstanceOf('Symfony\Component\Console\Exception\CommandNotFoundException', $e, '->find() throws a CommandNotFoundException if command does not exist');
-            $this->assertSame(array('afoobar1', 'foo:bar1'), $e->getAlternatives());
+            $this->assertSame(['afoobar1', 'foo:bar1'], $e->getAlternatives());
             $this->assertRegExp(sprintf('/Command "%s" is not defined./', $commandName), $e->getMessage(), '->find() throws a CommandNotFoundException if command does not exist, with alternatives');
             $this->assertRegExp('/afoobar1/', $e->getMessage(), '->find() throws a CommandNotFoundException if command does not exist, with alternative : "afoobar1"');
             $this->assertRegExp('/foo:bar1/', $e->getMessage(), '->find() throws a CommandNotFoundException if command does not exist, with alternative : "foo:bar1"');
@@ -590,7 +590,7 @@ class ApplicationTest extends TestCase
     public function testFindAlternativeCommandsWithAnAlias()
     {
         $fooCommand = new \FooCommand();
-        $fooCommand->setAliases(array('foo2'));
+        $fooCommand->setAliases(['foo2']);
 
         $application = new Application();
         $application->add($fooCommand);
@@ -614,7 +614,7 @@ class ApplicationTest extends TestCase
             $this->fail('->find() throws a CommandNotFoundException if namespace does not exist');
         } catch (\Exception $e) {
             $this->assertInstanceOf('Symfony\Component\Console\Exception\CommandNotFoundException', $e, '->find() throws a CommandNotFoundException if namespace does not exist');
-            $this->assertSame(array(), $e->getAlternatives());
+            $this->assertSame([], $e->getAlternatives());
             $this->assertEquals('There are no commands defined in the "Unknown-namespace" namespace.', $e->getMessage(), '->find() throws a CommandNotFoundException if namespace does not exist, without alternatives');
         }
 
@@ -644,7 +644,7 @@ class ApplicationTest extends TestCase
         $application->add(new \Foo2Command());
         $application->add(new \Foo3Command());
 
-        $expectedAlternatives = array(
+        $expectedAlternatives = [
             'afoobar',
             'afoobar1',
             'afoobar2',
@@ -652,7 +652,7 @@ class ApplicationTest extends TestCase
             'foo3:bar',
             'foo:bar',
             'foo:bar1',
-        );
+        ];
 
         try {
             $application->find('foo');
@@ -667,10 +667,10 @@ class ApplicationTest extends TestCase
 
     public function testFindNamespaceDoesNotFailOnDeepSimilarNamespaces()
     {
-        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(array('getNamespaces'))->getMock();
+        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(['getNamespaces'])->getMock();
         $application->expects($this->once())
             ->method('getNamespaces')
-            ->will($this->returnValue(array('foo:sublong', 'bar:sub')));
+            ->will($this->returnValue(['foo:sublong', 'bar:sub']));
 
         $this->assertEquals('foo:sublong', $application->findNamespace('f:sub'));
     }
@@ -697,16 +697,16 @@ class ApplicationTest extends TestCase
         $application->setCatchExceptions(true);
         $this->assertTrue($application->areExceptionsCaught());
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception1.txt', $tester->getDisplay(true), '->setCatchExceptions() sets the catch exception flag');
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception1.txt', $tester->getErrorOutput(true), '->setCatchExceptions() sets the catch exception flag');
         $this->assertSame('', $tester->getDisplay(true));
 
         $application->setCatchExceptions(false);
         try {
-            $tester->run(array('command' => 'foo'), array('decorated' => false));
+            $tester->run(['command' => 'foo'], ['decorated' => false]);
             $this->fail('->setCatchExceptions() sets the catch exception flag');
         } catch (\Exception $e) {
             $this->assertInstanceOf('\Exception', $e, '->setCatchExceptions() sets the catch exception flag');
@@ -730,29 +730,29 @@ class ApplicationTest extends TestCase
         putenv('COLUMNS=120');
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception1.txt', $tester->getErrorOutput(true), '->renderException() renders a pretty exception');
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE, 'capture_stderr_separately' => true]);
         $this->assertContains('Exception trace', $tester->getErrorOutput(), '->renderException() renders a pretty exception with a stack trace when verbosity is verbose');
 
-        $tester->run(array('command' => 'list', '--foo' => true), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'list', '--foo' => true], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception2.txt', $tester->getErrorOutput(true), '->renderException() renders the command synopsis when an exception occurs in the context of a command');
 
         $application->add(new \Foo3Command());
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo3:bar'), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo3:bar'], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception3.txt', $tester->getErrorOutput(true), '->renderException() renders a pretty exceptions with previous exceptions');
 
-        $tester->run(array('command' => 'foo3:bar'), array('decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE));
+        $tester->run(['command' => 'foo3:bar'], ['decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE]);
         $this->assertRegExp('/\[Exception\]\s*First exception/', $tester->getDisplay(), '->renderException() renders a pretty exception without code exception when code exception is default and verbosity is verbose');
         $this->assertRegExp('/\[Exception\]\s*Second exception/', $tester->getDisplay(), '->renderException() renders a pretty exception without code exception when code exception is 0 and verbosity is verbose');
         $this->assertRegExp('/\[Exception \(404\)\]\s*Third exception/', $tester->getDisplay(), '->renderException() renders a pretty exception with code exception when code exception is 404 and verbosity is verbose');
 
-        $tester->run(array('command' => 'foo3:bar'), array('decorated' => true));
+        $tester->run(['command' => 'foo3:bar'], ['decorated' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception3decorated.txt', $tester->getDisplay(true), '->renderException() renders a pretty exceptions with previous exceptions');
 
-        $tester->run(array('command' => 'foo3:bar'), array('decorated' => true, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo3:bar'], ['decorated' => true, 'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception3decorated.txt', $tester->getErrorOutput(true), '->renderException() renders a pretty exceptions with previous exceptions');
 
         $application = new Application();
@@ -760,7 +760,7 @@ class ApplicationTest extends TestCase
         putenv('COLUMNS=32');
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false,  'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false,  'capture_stderr_separately' => true]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_renderexception4.txt', $tester->getErrorOutput(true), '->renderException() wraps messages when they are bigger than the terminal');
         putenv('COLUMNS=120');
     }
@@ -775,10 +775,10 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/application_renderexception_doublewidth1.txt', $tester->getErrorOutput(true), '->renderException() renders a pretty exceptions with previous exceptions');
 
-        $tester->run(array('command' => 'foo'), array('decorated' => true, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => true, 'capture_stderr_separately' => true]);
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/application_renderexception_doublewidth1decorated.txt', $tester->getErrorOutput(true), '->renderException() renders a pretty exceptions with previous exceptions');
 
         $application = new Application();
@@ -788,7 +788,7 @@ class ApplicationTest extends TestCase
             throw new \Exception('コマンドの実行中にエラーが発生しました。');
         });
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'), array('decorated' => false, 'capture_stderr_separately' => true));
+        $tester->run(['command' => 'foo'], ['decorated' => false, 'capture_stderr_separately' => true]);
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/application_renderexception_doublewidth2.txt', $tester->getErrorOutput(true), '->renderException() wraps messages when they are bigger than the terminal');
         putenv('COLUMNS=120');
     }
@@ -803,14 +803,14 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/application_renderexception_escapeslines.txt', $tester->getDisplay(true), '->renderException() escapes lines containing formatting');
         putenv('COLUMNS=120');
     }
 
     public function testRenderExceptionLineBreaks()
     {
-        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(array('getTerminalWidth'))->getMock();
+        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(['getTerminalWidth'])->getMock();
         $application->setAutoExit(false);
         $application->expects($this->any())
             ->method('getTerminalWidth')
@@ -820,7 +820,7 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertStringMatchesFormatFile(self::$fixturesPath.'/application_renderexception_linebreaks.txt', $tester->getDisplay(true), '->renderException() keep multiple line breaks');
     }
 
@@ -834,7 +834,7 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertContains('[InvalidArgumentException@anonymous]', $tester->getDisplay(true));
 
         $application = new Application();
@@ -845,7 +845,7 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertContains('Dummy type "@anonymous" is invalid.', $tester->getDisplay(true));
     }
 
@@ -859,7 +859,7 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertContains('[InvalidArgumentException@anonymous]', $tester->getDisplay(true));
 
         $application = new Application();
@@ -870,7 +870,7 @@ class ApplicationTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo'), array('decorated' => false));
+        $tester->run(['command' => 'foo'], ['decorated' => false]);
         $this->assertContains('Dummy type "@anonymous" is invalid.', $tester->getDisplay(true));
     }
 
@@ -880,7 +880,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
         $application->setCatchExceptions(false);
         $application->add($command = new \Foo1Command());
-        $_SERVER['argv'] = array('cli.php', 'foo:bar1');
+        $_SERVER['argv'] = ['cli.php', 'foo:bar1'];
 
         ob_start();
         $application->run();
@@ -896,63 +896,63 @@ class ApplicationTest extends TestCase
         $this->ensureStaticCommandHelp($application);
         $tester = new ApplicationTester($application);
 
-        $tester->run(array(), array('decorated' => false));
+        $tester->run([], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run1.txt', $tester->getDisplay(true), '->run() runs the list command if no argument is passed');
 
-        $tester->run(array('--help' => true), array('decorated' => false));
+        $tester->run(['--help' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run2.txt', $tester->getDisplay(true), '->run() runs the help command if --help is passed');
 
-        $tester->run(array('-h' => true), array('decorated' => false));
+        $tester->run(['-h' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run2.txt', $tester->getDisplay(true), '->run() runs the help command if -h is passed');
 
-        $tester->run(array('command' => 'list', '--help' => true), array('decorated' => false));
+        $tester->run(['command' => 'list', '--help' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run3.txt', $tester->getDisplay(true), '->run() displays the help if --help is passed');
 
-        $tester->run(array('command' => 'list', '-h' => true), array('decorated' => false));
+        $tester->run(['command' => 'list', '-h' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run3.txt', $tester->getDisplay(true), '->run() displays the help if -h is passed');
 
-        $tester->run(array('--ansi' => true));
+        $tester->run(['--ansi' => true]);
         $this->assertTrue($tester->getOutput()->isDecorated(), '->run() forces color output if --ansi is passed');
 
-        $tester->run(array('--no-ansi' => true));
+        $tester->run(['--no-ansi' => true]);
         $this->assertFalse($tester->getOutput()->isDecorated(), '->run() forces color output to be disabled if --no-ansi is passed');
 
-        $tester->run(array('--version' => true), array('decorated' => false));
+        $tester->run(['--version' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run4.txt', $tester->getDisplay(true), '->run() displays the program version if --version is passed');
 
-        $tester->run(array('-V' => true), array('decorated' => false));
+        $tester->run(['-V' => true], ['decorated' => false]);
         $this->assertStringEqualsFile(self::$fixturesPath.'/application_run4.txt', $tester->getDisplay(true), '->run() displays the program version if -v is passed');
 
-        $tester->run(array('command' => 'list', '--quiet' => true));
+        $tester->run(['command' => 'list', '--quiet' => true]);
         $this->assertSame('', $tester->getDisplay(), '->run() removes all output if --quiet is passed');
         $this->assertFalse($tester->getInput()->isInteractive(), '->run() sets off the interactive mode if --quiet is passed');
 
-        $tester->run(array('command' => 'list', '-q' => true));
+        $tester->run(['command' => 'list', '-q' => true]);
         $this->assertSame('', $tester->getDisplay(), '->run() removes all output if -q is passed');
         $this->assertFalse($tester->getInput()->isInteractive(), '->run() sets off the interactive mode if -q is passed');
 
-        $tester->run(array('command' => 'list', '--verbose' => true));
+        $tester->run(['command' => 'list', '--verbose' => true]);
         $this->assertSame(Output::VERBOSITY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if --verbose is passed');
 
-        $tester->run(array('command' => 'list', '--verbose' => 1));
+        $tester->run(['command' => 'list', '--verbose' => 1]);
         $this->assertSame(Output::VERBOSITY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if --verbose=1 is passed');
 
-        $tester->run(array('command' => 'list', '--verbose' => 2));
+        $tester->run(['command' => 'list', '--verbose' => 2]);
         $this->assertSame(Output::VERBOSITY_VERY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to very verbose if --verbose=2 is passed');
 
-        $tester->run(array('command' => 'list', '--verbose' => 3));
+        $tester->run(['command' => 'list', '--verbose' => 3]);
         $this->assertSame(Output::VERBOSITY_DEBUG, $tester->getOutput()->getVerbosity(), '->run() sets the output to debug if --verbose=3 is passed');
 
-        $tester->run(array('command' => 'list', '--verbose' => 4));
+        $tester->run(['command' => 'list', '--verbose' => 4]);
         $this->assertSame(Output::VERBOSITY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if unknown --verbose level is passed');
 
-        $tester->run(array('command' => 'list', '-v' => true));
+        $tester->run(['command' => 'list', '-v' => true]);
         $this->assertSame(Output::VERBOSITY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if -v is passed');
 
-        $tester->run(array('command' => 'list', '-vv' => true));
+        $tester->run(['command' => 'list', '-vv' => true]);
         $this->assertSame(Output::VERBOSITY_VERY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if -v is passed');
 
-        $tester->run(array('command' => 'list', '-vvv' => true));
+        $tester->run(['command' => 'list', '-vvv' => true]);
         $this->assertSame(Output::VERBOSITY_DEBUG, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if -v is passed');
 
         $application = new Application();
@@ -961,10 +961,10 @@ class ApplicationTest extends TestCase
         $application->add(new \FooCommand());
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'foo:bar', '--no-interaction' => true), array('decorated' => false));
+        $tester->run(['command' => 'foo:bar', '--no-interaction' => true], ['decorated' => false]);
         $this->assertSame('called'.PHP_EOL, $tester->getDisplay(), '->run() does not call interact() if --no-interaction is passed');
 
-        $tester->run(array('command' => 'foo:bar', '-n' => true), array('decorated' => false));
+        $tester->run(['command' => 'foo:bar', '-n' => true], ['decorated' => false]);
         $this->assertSame('called'.PHP_EOL, $tester->getDisplay(), '->run() does not call interact() if -n is passed');
     }
 
@@ -984,12 +984,12 @@ class ApplicationTest extends TestCase
 
         $output = new StreamOutput(fopen('php://memory', 'w', false));
 
-        $input = new ArgvInput(array('cli.php', '-v', 'foo:bar'));
+        $input = new ArgvInput(['cli.php', '-v', 'foo:bar']);
         $application->run($input, $output);
 
         $this->addToAssertionCount(1);
 
-        $input = new ArgvInput(array('cli.php', '--verbose', 'foo:bar'));
+        $input = new ArgvInput(['cli.php', '--verbose', 'foo:bar']);
         $application->run($input, $output);
 
         $this->addToAssertionCount(1);
@@ -999,13 +999,13 @@ class ApplicationTest extends TestCase
     {
         $exception = new \Exception('', 4);
 
-        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(array('doRun'))->getMock();
+        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(['doRun'])->getMock();
         $application->setAutoExit(false);
         $application->expects($this->once())
             ->method('doRun')
             ->willThrowException($exception);
 
-        $exitCode = $application->run(new ArrayInput(array()), new NullOutput());
+        $exitCode = $application->run(new ArrayInput([]), new NullOutput());
 
         $this->assertSame(4, $exitCode, '->run() returns integer exit code extracted from raised exception');
     }
@@ -1029,7 +1029,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'test'));
+        $tester->run(['command' => 'test']);
 
         $this->assertTrue($passedRightValue, '-> exit code 4 was passed in the console.terminate event');
     }
@@ -1038,13 +1038,13 @@ class ApplicationTest extends TestCase
     {
         $exception = new \Exception('', 0);
 
-        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(array('doRun'))->getMock();
+        $application = $this->getMockBuilder('Symfony\Component\Console\Application')->setMethods(['doRun'])->getMock();
         $application->setAutoExit(false);
         $application->expects($this->once())
             ->method('doRun')
             ->willThrowException($exception);
 
-        $exitCode = $application->run(new ArrayInput(array()), new NullOutput());
+        $exitCode = $application->run(new ArrayInput([]), new NullOutput());
 
         $this->assertSame(1, $exitCode, '->run() returns exit code 1 when exception code is 0');
     }
@@ -1068,7 +1068,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'test'));
+        $tester->run(['command' => 'test']);
 
         $this->assertTrue($passedRightValue, '-> exit code 1 was passed in the console.terminate event');
     }
@@ -1089,12 +1089,12 @@ class ApplicationTest extends TestCase
 
         $application
             ->register('foo')
-            ->setAliases(array('f'))
-            ->setDefinition(array(new InputOption('survey', 'e', InputOption::VALUE_REQUIRED, 'My option with a shortcut.')))
+            ->setAliases(['f'])
+            ->setDefinition([new InputOption('survey', 'e', InputOption::VALUE_REQUIRED, 'My option with a shortcut.')])
             ->setCode(function (InputInterface $input, OutputInterface $output) {})
         ;
 
-        $input = new ArrayInput(array('command' => 'foo'));
+        $input = new ArrayInput(['command' => 'foo']);
         $output = new NullOutput();
 
         $application->run($input, $output);
@@ -1111,22 +1111,22 @@ class ApplicationTest extends TestCase
         $application->setCatchExceptions(false);
         $application
             ->register('foo')
-            ->setDefinition(array($def))
+            ->setDefinition([$def])
             ->setCode(function (InputInterface $input, OutputInterface $output) {})
         ;
 
-        $input = new ArrayInput(array('command' => 'foo'));
+        $input = new ArrayInput(['command' => 'foo']);
         $output = new NullOutput();
         $application->run($input, $output);
     }
 
     public function getAddingAlreadySetDefinitionElementData()
     {
-        return array(
-            array(new InputArgument('command', InputArgument::REQUIRED)),
-            array(new InputOption('quiet', '', InputOption::VALUE_NONE)),
-            array(new InputOption('query', 'q', InputOption::VALUE_NONE)),
-        );
+        return [
+            [new InputArgument('command', InputArgument::REQUIRED)],
+            [new InputOption('quiet', '', InputOption::VALUE_NONE)],
+            [new InputOption('query', 'q', InputOption::VALUE_NONE)],
+        ];
     }
 
     public function testGetDefaultHelperSetReturnsDefaultValues()
@@ -1146,7 +1146,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
         $application->setCatchExceptions(false);
 
-        $application->setHelperSet(new HelperSet(array(new FormatterHelper())));
+        $application->setHelperSet(new HelperSet([new FormatterHelper()]));
 
         $helperSet = $application->getHelperSet();
 
@@ -1163,7 +1163,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
         $application->setCatchExceptions(false);
 
-        $application->setHelperSet(new HelperSet(array(new FormatterHelper())));
+        $application->setHelperSet(new HelperSet([new FormatterHelper()]));
 
         $helperSet = $application->getHelperSet();
 
@@ -1221,7 +1221,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
         $application->setCatchExceptions(false);
 
-        $application->setDefinition(new InputDefinition(array(new InputOption('--custom', '-c', InputOption::VALUE_NONE, 'Set the custom input definition.'))));
+        $application->setDefinition(new InputDefinition([new InputOption('--custom', '-c', InputOption::VALUE_NONE, 'Set the custom input definition.')]));
 
         $inputDefinition = $application->getDefinition();
 
@@ -1250,7 +1250,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
         $this->assertEquals('before.foo.after.'.PHP_EOL, $tester->getDisplay());
     }
 
@@ -1270,7 +1270,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
     }
 
     public function testRunDispatchesAllEventsWithException()
@@ -1286,7 +1286,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
         $this->assertContains('before.foo.error.after.', $tester->getDisplay());
     }
 
@@ -1306,7 +1306,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
         $this->assertContains('before.error.after.', $tester->getDisplay());
     }
 
@@ -1325,7 +1325,7 @@ class ApplicationTest extends TestCase
         $tester = new ApplicationTester($application);
 
         try {
-            $tester->run(array('command' => 'dym'));
+            $tester->run(['command' => 'dym']);
             $this->fail('Error expected.');
         } catch (\Error $e) {
             $this->assertSame('dymerr', $e->getMessage());
@@ -1354,7 +1354,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
         $this->assertContains('before.error.silenced.after.', $tester->getDisplay());
         $this->assertEquals(ConsoleCommandEvent::RETURN_CODE_DISABLED, $tester->getStatusCode());
     }
@@ -1373,7 +1373,7 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'unknown'));
+        $tester->run(['command' => 'unknown']);
         $this->assertContains('silenced command not found', $tester->getDisplay());
         $this->assertEquals(1, $tester->getStatusCode());
     }
@@ -1392,7 +1392,7 @@ class ApplicationTest extends TestCase
         $tester = new ApplicationTester($application);
 
         try {
-            $tester->run(array('command' => 'dym'));
+            $tester->run(['command' => 'dym']);
             $this->fail('->run() should rethrow PHP errors if not handled via ConsoleErrorEvent.');
         } catch (\Error $e) {
             $this->assertSame($e->getMessage(), 'Class \'UnknownClass\' not found');
@@ -1417,7 +1417,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'dym'));
+        $tester->run(['command' => 'dym']);
         $this->assertContains('before.dym.error.after.', $tester->getDisplay(), 'The PHP Error did not dispached events');
     }
 
@@ -1434,7 +1434,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'dym'));
+        $tester->run(['command' => 'dym']);
         $this->assertContains('before.dym.error.after.', $tester->getDisplay(), 'The PHP Error did not dispached events');
     }
 
@@ -1451,7 +1451,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'dus'));
+        $tester->run(['command' => 'dus']);
         $this->assertSame(1, $tester->getStatusCode(), 'Status code should be 1');
     }
 
@@ -1466,7 +1466,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $exitCode = $tester->run(array('command' => 'foo'));
+        $exitCode = $tester->run(['command' => 'foo']);
         $this->assertContains('before.after.', $tester->getDisplay());
         $this->assertEquals(ConsoleCommandEvent::RETURN_CODE_DISABLED, $exitCode);
     }
@@ -1493,7 +1493,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo', '--no-interaction' => true));
+        $tester->run(['command' => 'foo', '--no-interaction' => true]);
 
         $this->assertTrue($noInteractionValue);
         $this->assertFalse($quietValue);
@@ -1523,7 +1523,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo', '--extra' => 'some test value'));
+        $tester->run(['command' => 'foo', '--extra' => 'some test value']);
 
         $this->assertEquals('some test value', $extraValue);
     }
@@ -1538,14 +1538,14 @@ class ApplicationTest extends TestCase
         $application->setDefaultCommand($command->getName());
 
         $tester = new ApplicationTester($application);
-        $tester->run(array(), array('interactive' => false));
+        $tester->run([], ['interactive' => false]);
         $this->assertEquals('called'.PHP_EOL, $tester->getDisplay(), 'Application runs the default set command if different from \'list\' command');
 
         $application = new CustomDefaultCommandApplication();
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array(), array('interactive' => false));
+        $tester->run([], ['interactive' => false]);
 
         $this->assertEquals('called'.PHP_EOL, $tester->getDisplay(), 'Application runs the default set command if different from \'list\' command');
     }
@@ -1560,7 +1560,7 @@ class ApplicationTest extends TestCase
         $application->setDefaultCommand($command->getName());
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('--fooopt' => 'opt'), array('interactive' => false));
+        $tester->run(['--fooopt' => 'opt'], ['interactive' => false]);
 
         $this->assertEquals('called'.PHP_EOL.'opt'.PHP_EOL, $tester->getDisplay(), 'Application runs the default set command if different from \'list\' command');
     }
@@ -1576,10 +1576,10 @@ class ApplicationTest extends TestCase
 
         $tester = new ApplicationTester($application);
 
-        $tester->run(array());
+        $tester->run([]);
         $this->assertContains('called', $tester->getDisplay());
 
-        $tester->run(array('--help' => true));
+        $tester->run(['--help' => true]);
         $this->assertContains('The foo:bar command', $tester->getDisplay());
     }
 
@@ -1592,9 +1592,9 @@ class ApplicationTest extends TestCase
         $application->setAutoExit(false);
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'help'));
+        $tester->run(['command' => 'help']);
 
-        $this->assertFalse($tester->getInput()->hasParameterOption(array('--no-interaction', '-n')));
+        $this->assertFalse($tester->getInput()->hasParameterOption(['--no-interaction', '-n']));
 
         $inputStream = $tester->getInput()->getStream();
         $this->assertEquals($tester->getInput()->isInteractive(), @posix_isatty($inputStream));
@@ -1606,9 +1606,9 @@ class ApplicationTest extends TestCase
         $container->addCompilerPass(new AddConsoleCommandPass());
         $container
             ->register('lazy-command', LazyCommand::class)
-            ->addTag('console.command', array('command' => 'lazy:command'))
-            ->addTag('console.command', array('command' => 'lazy:alias'))
-            ->addTag('console.command', array('command' => 'lazy:alias2'));
+            ->addTag('console.command', ['command' => 'lazy:command'])
+            ->addTag('console.command', ['command' => 'lazy:alias'])
+            ->addTag('console.command', ['command' => 'lazy:alias2']);
         $container->compile();
 
         $application = new Application();
@@ -1617,17 +1617,17 @@ class ApplicationTest extends TestCase
 
         $tester = new ApplicationTester($application);
 
-        $tester->run(array('command' => 'lazy:command'));
+        $tester->run(['command' => 'lazy:command']);
         $this->assertSame("lazy-command called\n", $tester->getDisplay(true));
 
-        $tester->run(array('command' => 'lazy:alias'));
+        $tester->run(['command' => 'lazy:alias']);
         $this->assertSame("lazy-command called\n", $tester->getDisplay(true));
 
-        $tester->run(array('command' => 'lazy:alias2'));
+        $tester->run(['command' => 'lazy:alias2']);
         $this->assertSame("lazy-command called\n", $tester->getDisplay(true));
 
         $command = $application->get('lazy:command');
-        $this->assertSame(array('lazy:alias', 'lazy:alias2'), $command->getAliases());
+        $this->assertSame(['lazy:alias', 'lazy:alias2'], $command->getAliases());
     }
 
     /**
@@ -1636,21 +1636,21 @@ class ApplicationTest extends TestCase
     public function testGetDisabledLazyCommand()
     {
         $application = new Application();
-        $application->setCommandLoader(new FactoryCommandLoader(array('disabled' => function () { return new DisabledCommand(); })));
+        $application->setCommandLoader(new FactoryCommandLoader(['disabled' => function () { return new DisabledCommand(); }]));
         $application->get('disabled');
     }
 
     public function testHasReturnsFalseForDisabledLazyCommand()
     {
         $application = new Application();
-        $application->setCommandLoader(new FactoryCommandLoader(array('disabled' => function () { return new DisabledCommand(); })));
+        $application->setCommandLoader(new FactoryCommandLoader(['disabled' => function () { return new DisabledCommand(); }]));
         $this->assertFalse($application->has('disabled'));
     }
 
     public function testAllExcludesDisabledLazyCommand()
     {
         $application = new Application();
-        $application->setCommandLoader(new FactoryCommandLoader(array('disabled' => function () { return new DisabledCommand(); })));
+        $application->setCommandLoader(new FactoryCommandLoader(['disabled' => function () { return new DisabledCommand(); }]));
         $this->assertArrayNotHasKey('disabled', $application->all());
     }
 
@@ -1693,7 +1693,7 @@ class ApplicationTest extends TestCase
         $tester = new ApplicationTester($application);
 
         try {
-            $tester->run(array('command' => 'dym'));
+            $tester->run(['command' => 'dym']);
             $this->fail('->run() should rethrow PHP errors if not handled via ConsoleErrorEvent.');
         } catch (\Error $e) {
             $this->assertSame($e->getMessage(), 'Class \'UnknownClass\' not found');
@@ -1725,7 +1725,7 @@ class ApplicationTest extends TestCase
         });
 
         $tester = new ApplicationTester($application);
-        $tester->run(array('command' => 'foo'));
+        $tester->run(['command' => 'foo']);
     }
 
     protected function tearDown()
@@ -1745,7 +1745,7 @@ class CustomApplication extends Application
      */
     protected function getDefaultInputDefinition()
     {
-        return new InputDefinition(array(new InputOption('--custom', '-c', InputOption::VALUE_NONE, 'Set the custom input definition.')));
+        return new InputDefinition([new InputOption('--custom', '-c', InputOption::VALUE_NONE, 'Set the custom input definition.')]);
     }
 
     /**
@@ -1755,7 +1755,7 @@ class CustomApplication extends Application
      */
     protected function getDefaultHelperSet()
     {
-        return new HelperSet(array(new FormatterHelper()));
+        return new HelperSet([new FormatterHelper()]);
     }
 }
 
diff --git a/src/Symfony/Component/Console/Tests/Command/CommandTest.php b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
index 2ee16423b6..6b1c99fdc7 100644
--- a/src/Symfony/Component/Console/Tests/Command/CommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/CommandTest.php
@@ -71,7 +71,7 @@ class CommandTest extends TestCase
         $ret = $command->setDefinition($definition = new InputDefinition());
         $this->assertEquals($command, $ret, '->setDefinition() implements a fluent interface');
         $this->assertEquals($definition, $command->getDefinition(), '->setDefinition() sets the current InputDefinition instance');
-        $command->setDefinition(array(new InputArgument('foo'), new InputOption('bar')));
+        $command->setDefinition([new InputArgument('foo'), new InputOption('bar')]);
         $this->assertTrue($command->getDefinition()->hasArgument('foo'), '->setDefinition() also takes an array of InputArguments and InputOptions as an argument');
         $this->assertTrue($command->getDefinition()->hasOption('bar'), '->setDefinition() also takes an array of InputArguments and InputOptions as an argument');
         $command->setDefinition(new InputDefinition());
@@ -130,10 +130,10 @@ class CommandTest extends TestCase
 
     public function provideInvalidCommandNames()
     {
-        return array(
-            array(''),
-            array('foo:'),
-        );
+        return [
+            [''],
+            ['foo:'],
+        ];
     }
 
     public function testGetSetDescription()
@@ -179,10 +179,10 @@ class CommandTest extends TestCase
     public function testGetSetAliases()
     {
         $command = new \TestCommand();
-        $this->assertEquals(array('name'), $command->getAliases(), '->getAliases() returns the aliases');
-        $ret = $command->setAliases(array('name1'));
+        $this->assertEquals(['name'], $command->getAliases(), '->getAliases() returns the aliases');
+        $ret = $command->setAliases(['name1']);
         $this->assertEquals($command, $ret, '->setAliases() implements a fluent interface');
-        $this->assertEquals(array('name1'), $command->getAliases(), '->setAliases() sets the aliases');
+        $this->assertEquals(['name1'], $command->getAliases(), '->setAliases() sets the aliases');
     }
 
     public function testSetAliasesNull()
@@ -231,11 +231,11 @@ class CommandTest extends TestCase
     public function testMergeApplicationDefinition()
     {
         $application1 = new Application();
-        $application1->getDefinition()->addArguments(array(new InputArgument('foo')));
-        $application1->getDefinition()->addOptions(array(new InputOption('bar')));
+        $application1->getDefinition()->addArguments([new InputArgument('foo')]);
+        $application1->getDefinition()->addOptions([new InputOption('bar')]);
         $command = new \TestCommand();
         $command->setApplication($application1);
-        $command->setDefinition($definition = new InputDefinition(array(new InputArgument('bar'), new InputOption('foo'))));
+        $command->setDefinition($definition = new InputDefinition([new InputArgument('bar'), new InputOption('foo')]));
 
         $r = new \ReflectionObject($command);
         $m = $r->getMethod('mergeApplicationDefinition');
@@ -253,11 +253,11 @@ class CommandTest extends TestCase
     public function testMergeApplicationDefinitionWithoutArgsThenWithArgsAddsArgs()
     {
         $application1 = new Application();
-        $application1->getDefinition()->addArguments(array(new InputArgument('foo')));
-        $application1->getDefinition()->addOptions(array(new InputOption('bar')));
+        $application1->getDefinition()->addArguments([new InputArgument('foo')]);
+        $application1->getDefinition()->addOptions([new InputOption('bar')]);
         $command = new \TestCommand();
         $command->setApplication($application1);
-        $command->setDefinition($definition = new InputDefinition(array()));
+        $command->setDefinition($definition = new InputDefinition([]));
 
         $r = new \ReflectionObject($command);
         $m = $r->getMethod('mergeApplicationDefinition');
@@ -277,7 +277,7 @@ class CommandTest extends TestCase
     {
         $tester = new CommandTester(new \TestCommand());
 
-        $tester->execute(array(), array('interactive' => true));
+        $tester->execute([], ['interactive' => true]);
 
         $this->assertEquals('interact called'.PHP_EOL.'execute called'.PHP_EOL, $tester->getDisplay(), '->run() calls the interact() method if the input is interactive');
     }
@@ -286,7 +286,7 @@ class CommandTest extends TestCase
     {
         $tester = new CommandTester(new \TestCommand());
 
-        $tester->execute(array(), array('interactive' => false));
+        $tester->execute([], ['interactive' => false]);
 
         $this->assertEquals('execute called'.PHP_EOL, $tester->getDisplay(), '->run() does not call the interact() method if the input is not interactive');
     }
@@ -309,7 +309,7 @@ class CommandTest extends TestCase
     {
         $command = new \TestCommand();
         $tester = new CommandTester($command);
-        $tester->execute(array('--bar' => true));
+        $tester->execute(['--bar' => true]);
     }
 
     public function testRunReturnsIntegerExitCode()
@@ -318,7 +318,7 @@ class CommandTest extends TestCase
         $exitCode = $command->run(new StringInput(''), new NullOutput());
         $this->assertSame(0, $exitCode, '->run() returns integer exit code (treats null as 0)');
 
-        $command = $this->getMockBuilder('TestCommand')->setMethods(array('execute'))->getMock();
+        $command = $this->getMockBuilder('TestCommand')->setMethods(['execute'])->getMock();
         $command->expects($this->once())
             ->method('execute')
             ->will($this->returnValue('2.3'));
@@ -364,16 +364,16 @@ class CommandTest extends TestCase
         });
         $this->assertEquals($command, $ret, '->setCode() implements a fluent interface');
         $tester = new CommandTester($command);
-        $tester->execute(array());
+        $tester->execute([]);
         $this->assertEquals('interact called'.PHP_EOL.'from the code...'.PHP_EOL, $tester->getDisplay());
     }
 
     public function getSetCodeBindToClosureTests()
     {
-        return array(
-            array(true, 'not bound to the command'),
-            array(false, 'bound to the command'),
-        );
+        return [
+            [true, 'not bound to the command'],
+            [false, 'bound to the command'],
+        ];
     }
 
     /**
@@ -389,7 +389,7 @@ class CommandTest extends TestCase
         $command = new \TestCommand();
         $command->setCode($code);
         $tester = new CommandTester($command);
-        $tester->execute(array());
+        $tester->execute([]);
         $this->assertEquals('interact called'.PHP_EOL.$expected.PHP_EOL, $tester->getDisplay());
     }
 
@@ -398,7 +398,7 @@ class CommandTest extends TestCase
         $command = new \TestCommand();
         $command->setCode(self::createClosure());
         $tester = new CommandTester($command);
-        $tester->execute(array());
+        $tester->execute([]);
 
         $this->assertEquals('interact called'.PHP_EOL.'bound'.PHP_EOL, $tester->getDisplay());
     }
@@ -413,10 +413,10 @@ class CommandTest extends TestCase
     public function testSetCodeWithNonClosureCallable()
     {
         $command = new \TestCommand();
-        $ret = $command->setCode(array($this, 'callableMethodCommand'));
+        $ret = $command->setCode([$this, 'callableMethodCommand']);
         $this->assertEquals($command, $ret, '->setCode() implements a fluent interface');
         $tester = new CommandTester($command);
-        $tester->execute(array());
+        $tester->execute([]);
         $this->assertEquals('interact called'.PHP_EOL.'from the code...'.PHP_EOL, $tester->getDisplay());
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php b/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
index 30fe2b6e7f..ce9d8d4fe4 100644
--- a/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/HelpCommandTest.php
@@ -24,7 +24,7 @@ class HelpCommandTest extends TestCase
         $command = new HelpCommand();
         $command->setApplication(new Application());
         $commandTester = new CommandTester($command);
-        $commandTester->execute(array('command_name' => 'li'), array('decorated' => false));
+        $commandTester->execute(['command_name' => 'li'], ['decorated' => false]);
         $this->assertContains('list [options] [--] [<namespace>]', $commandTester->getDisplay(), '->execute() returns a text help for the given command alias');
         $this->assertContains('format=FORMAT', $commandTester->getDisplay(), '->execute() returns a text help for the given command alias');
         $this->assertContains('raw', $commandTester->getDisplay(), '->execute() returns a text help for the given command alias');
@@ -35,7 +35,7 @@ class HelpCommandTest extends TestCase
         $command = new HelpCommand();
         $commandTester = new CommandTester($command);
         $command->setCommand(new ListCommand());
-        $commandTester->execute(array(), array('decorated' => false));
+        $commandTester->execute([], ['decorated' => false]);
         $this->assertContains('list [options] [--] [<namespace>]', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
         $this->assertContains('format=FORMAT', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
         $this->assertContains('raw', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
@@ -46,7 +46,7 @@ class HelpCommandTest extends TestCase
         $command = new HelpCommand();
         $commandTester = new CommandTester($command);
         $command->setCommand(new ListCommand());
-        $commandTester->execute(array('--format' => 'xml'));
+        $commandTester->execute(['--format' => 'xml']);
         $this->assertContains('<command', $commandTester->getDisplay(), '->execute() returns an XML help text if --xml is passed');
     }
 
@@ -54,7 +54,7 @@ class HelpCommandTest extends TestCase
     {
         $application = new Application();
         $commandTester = new CommandTester($application->get('help'));
-        $commandTester->execute(array('command_name' => 'list'));
+        $commandTester->execute(['command_name' => 'list']);
         $this->assertContains('list [options] [--] [<namespace>]', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
         $this->assertContains('format=FORMAT', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
         $this->assertContains('raw', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
@@ -64,7 +64,7 @@ class HelpCommandTest extends TestCase
     {
         $application = new Application();
         $commandTester = new CommandTester($application->get('help'));
-        $commandTester->execute(array('command_name' => 'list', '--format' => 'xml'));
+        $commandTester->execute(['command_name' => 'list', '--format' => 'xml']);
         $this->assertContains('list [--raw] [--format FORMAT] [--] [&lt;namespace&gt;]', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
         $this->assertContains('<command', $commandTester->getDisplay(), '->execute() returns an XML help text if --format=xml is passed');
     }
diff --git a/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php b/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
index b39f7ec545..57687d4c60 100644
--- a/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/ListCommandTest.php
@@ -21,7 +21,7 @@ class ListCommandTest extends TestCase
     {
         $application = new Application();
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName()), array('decorated' => false));
+        $commandTester->execute(['command' => $command->getName()], ['decorated' => false]);
 
         $this->assertRegExp('/help\s{2,}Displays help for a command/', $commandTester->getDisplay(), '->execute() returns a list of available commands');
     }
@@ -30,7 +30,7 @@ class ListCommandTest extends TestCase
     {
         $application = new Application();
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName(), '--format' => 'xml'));
+        $commandTester->execute(['command' => $command->getName(), '--format' => 'xml']);
         $this->assertRegExp('/<command id="list" name="list" hidden="0">/', $commandTester->getDisplay(), '->execute() returns a list of available commands in XML if --xml is passed');
     }
 
@@ -38,7 +38,7 @@ class ListCommandTest extends TestCase
     {
         $application = new Application();
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName(), '--raw' => true));
+        $commandTester->execute(['command' => $command->getName(), '--raw' => true]);
         $output = <<<'EOF'
 help   Displays help for a command
 list   Lists commands
@@ -54,7 +54,7 @@ EOF;
         $application = new Application();
         $application->add(new \FooCommand());
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName(), 'namespace' => 'foo', '--raw' => true));
+        $commandTester->execute(['command' => $command->getName(), 'namespace' => 'foo', '--raw' => true]);
         $output = <<<'EOF'
 foo:bar   The foo:bar command
 
@@ -69,7 +69,7 @@ EOF;
         $application = new Application();
         $application->add(new \Foo6Command());
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName()), array('decorated' => false));
+        $commandTester->execute(['command' => $command->getName()], ['decorated' => false]);
         $output = <<<'EOF'
 Console Tool
 
@@ -101,7 +101,7 @@ EOF;
         $application = new Application();
         $application->add(new \Foo6Command());
         $commandTester = new CommandTester($command = $application->get('list'));
-        $commandTester->execute(array('command' => $command->getName(), '--raw' => true));
+        $commandTester->execute(['command' => $command->getName(), '--raw' => true]);
         $output = <<<'EOF'
 help       Displays help for a command
 list       Lists commands
diff --git a/src/Symfony/Component/Console/Tests/Command/LockableTraitTest.php b/src/Symfony/Component/Console/Tests/Command/LockableTraitTest.php
index f5d62d73f2..94b0819bbf 100644
--- a/src/Symfony/Component/Console/Tests/Command/LockableTraitTest.php
+++ b/src/Symfony/Component/Console/Tests/Command/LockableTraitTest.php
@@ -33,8 +33,8 @@ class LockableTraitTest extends TestCase
         $command = new \FooLockCommand();
 
         $tester = new CommandTester($command);
-        $this->assertSame(2, $tester->execute(array()));
-        $this->assertSame(2, $tester->execute(array()));
+        $this->assertSame(2, $tester->execute([]));
+        $this->assertSame(2, $tester->execute([]));
     }
 
     public function testLockReturnsFalseIfAlreadyLockedByAnotherCommand()
@@ -51,10 +51,10 @@ class LockableTraitTest extends TestCase
         $lock->acquire();
 
         $tester = new CommandTester($command);
-        $this->assertSame(1, $tester->execute(array()));
+        $this->assertSame(1, $tester->execute([]));
 
         $lock->release();
-        $this->assertSame(2, $tester->execute(array()));
+        $this->assertSame(2, $tester->execute([]));
     }
 
     public function testMultipleLockCallsThrowLogicException()
@@ -62,6 +62,6 @@ class LockableTraitTest extends TestCase
         $command = new \FooLock2Command();
 
         $tester = new CommandTester($command);
-        $this->assertSame(1, $tester->execute(array()));
+        $this->assertSame(1, $tester->execute([]));
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/CommandLoader/ContainerCommandLoaderTest.php b/src/Symfony/Component/Console/Tests/CommandLoader/ContainerCommandLoaderTest.php
index 78eefd24f1..18d6e77bfb 100644
--- a/src/Symfony/Component/Console/Tests/CommandLoader/ContainerCommandLoaderTest.php
+++ b/src/Symfony/Component/Console/Tests/CommandLoader/ContainerCommandLoaderTest.php
@@ -20,10 +20,10 @@ class ContainerCommandLoaderTest extends TestCase
 {
     public function testHas()
     {
-        $loader = new ContainerCommandLoader(new ServiceLocator(array(
+        $loader = new ContainerCommandLoader(new ServiceLocator([
             'foo-service' => function () { return new Command('foo'); },
             'bar-service' => function () { return new Command('bar'); },
-        )), array('foo' => 'foo-service', 'bar' => 'bar-service'));
+        ]), ['foo' => 'foo-service', 'bar' => 'bar-service']);
 
         $this->assertTrue($loader->has('foo'));
         $this->assertTrue($loader->has('bar'));
@@ -32,10 +32,10 @@ class ContainerCommandLoaderTest extends TestCase
 
     public function testGet()
     {
-        $loader = new ContainerCommandLoader(new ServiceLocator(array(
+        $loader = new ContainerCommandLoader(new ServiceLocator([
             'foo-service' => function () { return new Command('foo'); },
             'bar-service' => function () { return new Command('bar'); },
-        )), array('foo' => 'foo-service', 'bar' => 'bar-service'));
+        ]), ['foo' => 'foo-service', 'bar' => 'bar-service']);
 
         $this->assertInstanceOf(Command::class, $loader->get('foo'));
         $this->assertInstanceOf(Command::class, $loader->get('bar'));
@@ -46,16 +46,16 @@ class ContainerCommandLoaderTest extends TestCase
      */
     public function testGetUnknownCommandThrows()
     {
-        (new ContainerCommandLoader(new ServiceLocator(array()), array()))->get('unknown');
+        (new ContainerCommandLoader(new ServiceLocator([]), []))->get('unknown');
     }
 
     public function testGetCommandNames()
     {
-        $loader = new ContainerCommandLoader(new ServiceLocator(array(
+        $loader = new ContainerCommandLoader(new ServiceLocator([
             'foo-service' => function () { return new Command('foo'); },
             'bar-service' => function () { return new Command('bar'); },
-        )), array('foo' => 'foo-service', 'bar' => 'bar-service'));
+        ]), ['foo' => 'foo-service', 'bar' => 'bar-service']);
 
-        $this->assertSame(array('foo', 'bar'), $loader->getNames());
+        $this->assertSame(['foo', 'bar'], $loader->getNames());
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/CommandLoader/FactoryCommandLoaderTest.php b/src/Symfony/Component/Console/Tests/CommandLoader/FactoryCommandLoaderTest.php
index 5ee6cd1ec3..7b9ec837e6 100644
--- a/src/Symfony/Component/Console/Tests/CommandLoader/FactoryCommandLoaderTest.php
+++ b/src/Symfony/Component/Console/Tests/CommandLoader/FactoryCommandLoaderTest.php
@@ -19,10 +19,10 @@ class FactoryCommandLoaderTest extends TestCase
 {
     public function testHas()
     {
-        $loader = new FactoryCommandLoader(array(
+        $loader = new FactoryCommandLoader([
             'foo' => function () { return new Command('foo'); },
             'bar' => function () { return new Command('bar'); },
-        ));
+        ]);
 
         $this->assertTrue($loader->has('foo'));
         $this->assertTrue($loader->has('bar'));
@@ -31,10 +31,10 @@ class FactoryCommandLoaderTest extends TestCase
 
     public function testGet()
     {
-        $loader = new FactoryCommandLoader(array(
+        $loader = new FactoryCommandLoader([
             'foo' => function () { return new Command('foo'); },
             'bar' => function () { return new Command('bar'); },
-        ));
+        ]);
 
         $this->assertInstanceOf(Command::class, $loader->get('foo'));
         $this->assertInstanceOf(Command::class, $loader->get('bar'));
@@ -45,16 +45,16 @@ class FactoryCommandLoaderTest extends TestCase
      */
     public function testGetUnknownCommandThrows()
     {
-        (new FactoryCommandLoader(array()))->get('unknown');
+        (new FactoryCommandLoader([]))->get('unknown');
     }
 
     public function testGetCommandNames()
     {
-        $loader = new FactoryCommandLoader(array(
+        $loader = new FactoryCommandLoader([
             'foo' => function () { return new Command('foo'); },
             'bar' => function () { return new Command('bar'); },
-        ));
+        ]);
 
-        $this->assertSame(array('foo', 'bar'), $loader->getNames());
+        $this->assertSame(['foo', 'bar'], $loader->getNames());
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/DependencyInjection/AddConsoleCommandPassTest.php b/src/Symfony/Component/Console/Tests/DependencyInjection/AddConsoleCommandPassTest.php
index af3e66ec59..a0b66bc178 100644
--- a/src/Symfony/Component/Console/Tests/DependencyInjection/AddConsoleCommandPassTest.php
+++ b/src/Symfony/Component/Console/Tests/DependencyInjection/AddConsoleCommandPassTest.php
@@ -53,7 +53,7 @@ class AddConsoleCommandPassTest extends TestCase
         }
 
         $this->assertTrue($container->hasParameter('console.command.ids'));
-        $this->assertSame(array($public ? $id : $alias), $container->getParameter('console.command.ids'));
+        $this->assertSame([$public ? $id : $alias], $container->getParameter('console.command.ids'));
     }
 
     public function testProcessRegistersLazyCommands()
@@ -62,8 +62,8 @@ class AddConsoleCommandPassTest extends TestCase
         $command = $container
             ->register('my-command', MyCommand::class)
             ->setPublic(false)
-            ->addTag('console.command', array('command' => 'my:command'))
-            ->addTag('console.command', array('command' => 'my:alias'))
+            ->addTag('console.command', ['command' => 'my:command'])
+            ->addTag('console.command', ['command' => 'my:alias'])
         ;
 
         (new AddConsoleCommandPass())->process($container);
@@ -72,10 +72,10 @@ class AddConsoleCommandPassTest extends TestCase
         $commandLocator = $container->getDefinition((string) $commandLoader->getArgument(0));
 
         $this->assertSame(ContainerCommandLoader::class, $commandLoader->getClass());
-        $this->assertSame(array('my:command' => 'my-command', 'my:alias' => 'my-command'), $commandLoader->getArgument(1));
-        $this->assertEquals(array(array('my-command' => new ServiceClosureArgument(new TypedReference('my-command', MyCommand::class)))), $commandLocator->getArguments());
-        $this->assertSame(array(), $container->getParameter('console.command.ids'));
-        $this->assertSame(array(array('setName', array('my:command')), array('setAliases', array(array('my:alias')))), $command->getMethodCalls());
+        $this->assertSame(['my:command' => 'my-command', 'my:alias' => 'my-command'], $commandLoader->getArgument(1));
+        $this->assertEquals([['my-command' => new ServiceClosureArgument(new TypedReference('my-command', MyCommand::class))]], $commandLocator->getArguments());
+        $this->assertSame([], $container->getParameter('console.command.ids'));
+        $this->assertSame([['setName', ['my:command']], ['setAliases', [['my:alias']]]], $command->getMethodCalls());
     }
 
     public function testProcessFallsBackToDefaultName()
@@ -94,28 +94,28 @@ class AddConsoleCommandPassTest extends TestCase
         $commandLocator = $container->getDefinition((string) $commandLoader->getArgument(0));
 
         $this->assertSame(ContainerCommandLoader::class, $commandLoader->getClass());
-        $this->assertSame(array('default' => 'with-default-name'), $commandLoader->getArgument(1));
-        $this->assertEquals(array(array('with-default-name' => new ServiceClosureArgument(new TypedReference('with-default-name', NamedCommand::class)))), $commandLocator->getArguments());
-        $this->assertSame(array(), $container->getParameter('console.command.ids'));
+        $this->assertSame(['default' => 'with-default-name'], $commandLoader->getArgument(1));
+        $this->assertEquals([['with-default-name' => new ServiceClosureArgument(new TypedReference('with-default-name', NamedCommand::class))]], $commandLocator->getArguments());
+        $this->assertSame([], $container->getParameter('console.command.ids'));
 
         $container = new ContainerBuilder();
         $container
             ->register('with-default-name', NamedCommand::class)
             ->setPublic(false)
-            ->addTag('console.command', array('command' => 'new-name'))
+            ->addTag('console.command', ['command' => 'new-name'])
         ;
 
         $pass->process($container);
 
-        $this->assertSame(array('new-name' => 'with-default-name'), $container->getDefinition('console.command_loader')->getArgument(1));
+        $this->assertSame(['new-name' => 'with-default-name'], $container->getDefinition('console.command_loader')->getArgument(1));
     }
 
     public function visibilityProvider()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php b/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
index 3686e7543b..320a4fb9f4 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/AbstractDescriptorTest.php
@@ -89,19 +89,19 @@ abstract class AbstractDescriptorTest extends TestCase
 
     protected function getDescriptionTestData(array $objects)
     {
-        $data = array();
+        $data = [];
         foreach ($objects as $name => $object) {
             $description = file_get_contents(sprintf('%s/../Fixtures/%s.%s', __DIR__, $name, $this->getFormat()));
-            $data[] = array($object, $description);
+            $data[] = [$object, $description];
         }
 
         return $data;
     }
 
-    protected function assertDescription($expectedDescription, $describedObject, array $options = array())
+    protected function assertDescription($expectedDescription, $describedObject, array $options = [])
     {
         $output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, true);
-        $this->getDescriptor()->describe($output, $describedObject, $options + array('raw_output' => true));
+        $this->getDescriptor()->describe($output, $describedObject, $options + ['raw_output' => true]);
         $this->assertEquals(trim($expectedDescription), trim(str_replace(PHP_EOL, "\n", $output->fetch())));
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/JsonDescriptorTest.php b/src/Symfony/Component/Console/Tests/Descriptor/JsonDescriptorTest.php
index dffcaf6648..fb596b8d7a 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/JsonDescriptorTest.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/JsonDescriptorTest.php
@@ -26,10 +26,10 @@ class JsonDescriptorTest extends AbstractDescriptorTest
         return 'json';
     }
 
-    protected function assertDescription($expectedDescription, $describedObject, array $options = array())
+    protected function assertDescription($expectedDescription, $describedObject, array $options = [])
     {
         $output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, true);
-        $this->getDescriptor()->describe($output, $describedObject, $options + array('raw_output' => true));
+        $this->getDescriptor()->describe($output, $describedObject, $options + ['raw_output' => true]);
         $this->assertEquals(json_decode(trim($expectedDescription), true), json_decode(trim(str_replace(PHP_EOL, "\n", $output->fetch())), true));
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/MarkdownDescriptorTest.php b/src/Symfony/Component/Console/Tests/Descriptor/MarkdownDescriptorTest.php
index eb80f58b1c..a8f11cb4ae 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/MarkdownDescriptorTest.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/MarkdownDescriptorTest.php
@@ -21,7 +21,7 @@ class MarkdownDescriptorTest extends AbstractDescriptorTest
     {
         return $this->getDescriptionTestData(array_merge(
             ObjectsProvider::getCommands(),
-            array('command_mbstring' => new DescriptorCommandMbString())
+            ['command_mbstring' => new DescriptorCommandMbString()]
         ));
     }
 
@@ -29,7 +29,7 @@ class MarkdownDescriptorTest extends AbstractDescriptorTest
     {
         return $this->getDescriptionTestData(array_merge(
             ObjectsProvider::getApplications(),
-            array('application_mbstring' => new DescriptorApplicationMbString())
+            ['application_mbstring' => new DescriptorApplicationMbString()]
         ));
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/ObjectsProvider.php b/src/Symfony/Component/Console/Tests/Descriptor/ObjectsProvider.php
index b4f34ada19..d46d6f18ba 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/ObjectsProvider.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/ObjectsProvider.php
@@ -26,57 +26,57 @@ class ObjectsProvider
 {
     public static function getInputArguments()
     {
-        return array(
+        return [
             'input_argument_1' => new InputArgument('argument_name', InputArgument::REQUIRED),
             'input_argument_2' => new InputArgument('argument_name', InputArgument::IS_ARRAY, 'argument description'),
             'input_argument_3' => new InputArgument('argument_name', InputArgument::OPTIONAL, 'argument description', 'default_value'),
             'input_argument_4' => new InputArgument('argument_name', InputArgument::REQUIRED, "multiline\nargument description"),
             'input_argument_with_style' => new InputArgument('argument_name', InputArgument::OPTIONAL, 'argument description', '<comment>style</>'),
             'input_argument_with_default_inf_value' => new InputArgument('argument_name', InputArgument::OPTIONAL, 'argument description', INF),
-        );
+        ];
     }
 
     public static function getInputOptions()
     {
-        return array(
+        return [
             'input_option_1' => new InputOption('option_name', 'o', InputOption::VALUE_NONE),
             'input_option_2' => new InputOption('option_name', 'o', InputOption::VALUE_OPTIONAL, 'option description', 'default_value'),
             'input_option_3' => new InputOption('option_name', 'o', InputOption::VALUE_REQUIRED, 'option description'),
-            'input_option_4' => new InputOption('option_name', 'o', InputOption::VALUE_IS_ARRAY | InputOption::VALUE_OPTIONAL, 'option description', array()),
+            'input_option_4' => new InputOption('option_name', 'o', InputOption::VALUE_IS_ARRAY | InputOption::VALUE_OPTIONAL, 'option description', []),
             'input_option_5' => new InputOption('option_name', 'o', InputOption::VALUE_REQUIRED, "multiline\noption description"),
-            'input_option_6' => new InputOption('option_name', array('o', 'O'), InputOption::VALUE_REQUIRED, 'option with multiple shortcuts'),
+            'input_option_6' => new InputOption('option_name', ['o', 'O'], InputOption::VALUE_REQUIRED, 'option with multiple shortcuts'),
             'input_option_with_style' => new InputOption('option_name', 'o', InputOption::VALUE_REQUIRED, 'option description', '<comment>style</>'),
-            'input_option_with_style_array' => new InputOption('option_name', 'o', InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED, 'option description', array('<comment>Hello</comment>', '<info>world</info>')),
+            'input_option_with_style_array' => new InputOption('option_name', 'o', InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED, 'option description', ['<comment>Hello</comment>', '<info>world</info>']),
             'input_option_with_default_inf_value' => new InputOption('option_name', 'o', InputOption::VALUE_OPTIONAL, 'option description', INF),
-        );
+        ];
     }
 
     public static function getInputDefinitions()
     {
-        return array(
+        return [
             'input_definition_1' => new InputDefinition(),
-            'input_definition_2' => new InputDefinition(array(new InputArgument('argument_name', InputArgument::REQUIRED))),
-            'input_definition_3' => new InputDefinition(array(new InputOption('option_name', 'o', InputOption::VALUE_NONE))),
-            'input_definition_4' => new InputDefinition(array(
+            'input_definition_2' => new InputDefinition([new InputArgument('argument_name', InputArgument::REQUIRED)]),
+            'input_definition_3' => new InputDefinition([new InputOption('option_name', 'o', InputOption::VALUE_NONE)]),
+            'input_definition_4' => new InputDefinition([
                 new InputArgument('argument_name', InputArgument::REQUIRED),
                 new InputOption('option_name', 'o', InputOption::VALUE_NONE),
-            )),
-        );
+            ]),
+        ];
     }
 
     public static function getCommands()
     {
-        return array(
+        return [
             'command_1' => new DescriptorCommand1(),
             'command_2' => new DescriptorCommand2(),
-        );
+        ];
     }
 
     public static function getApplications()
     {
-        return array(
+        return [
             'application_1' => new DescriptorApplication1(),
             'application_2' => new DescriptorApplication2(),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Descriptor/TextDescriptorTest.php b/src/Symfony/Component/Console/Tests/Descriptor/TextDescriptorTest.php
index c024a522ef..26bbd907a7 100644
--- a/src/Symfony/Component/Console/Tests/Descriptor/TextDescriptorTest.php
+++ b/src/Symfony/Component/Console/Tests/Descriptor/TextDescriptorTest.php
@@ -22,7 +22,7 @@ class TextDescriptorTest extends AbstractDescriptorTest
     {
         return $this->getDescriptionTestData(array_merge(
             ObjectsProvider::getCommands(),
-            array('command_mbstring' => new DescriptorCommandMbString())
+            ['command_mbstring' => new DescriptorCommandMbString()]
         ));
     }
 
@@ -30,7 +30,7 @@ class TextDescriptorTest extends AbstractDescriptorTest
     {
         return $this->getDescriptionTestData(array_merge(
             ObjectsProvider::getApplications(),
-            array('application_mbstring' => new DescriptorApplicationMbString())
+            ['application_mbstring' => new DescriptorApplicationMbString()]
         ));
     }
 
@@ -38,7 +38,7 @@ class TextDescriptorTest extends AbstractDescriptorTest
     {
         $application = new DescriptorApplication2();
 
-        $this->assertDescription(file_get_contents(__DIR__.'/../Fixtures/application_filtered_namespace.txt'), $application, array('namespace' => 'command4'));
+        $this->assertDescription(file_get_contents(__DIR__.'/../Fixtures/application_filtered_namespace.txt'), $application, ['namespace' => 'command4']);
     }
 
     protected function getDescriptor()
diff --git a/src/Symfony/Component/Console/Tests/EventListener/ErrorListenerTest.php b/src/Symfony/Component/Console/Tests/EventListener/ErrorListenerTest.php
index b3f3fb4546..39766db3d8 100644
--- a/src/Symfony/Component/Console/Tests/EventListener/ErrorListenerTest.php
+++ b/src/Symfony/Component/Console/Tests/EventListener/ErrorListenerTest.php
@@ -34,11 +34,11 @@ class ErrorListenerTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('error')
-            ->with('Error thrown while running command "{command}". Message: "{message}"', array('exception' => $error, 'command' => 'test:run --foo=baz buzz', 'message' => 'An error occurred'))
+            ->with('Error thrown while running command "{command}". Message: "{message}"', ['exception' => $error, 'command' => 'test:run --foo=baz buzz', 'message' => 'An error occurred'])
         ;
 
         $listener = new ErrorListener($logger);
-        $listener->onConsoleError(new ConsoleErrorEvent(new ArgvInput(array('console.php', 'test:run', '--foo=baz', 'buzz')), $this->getOutput(), $error, new Command('test:run')));
+        $listener->onConsoleError(new ConsoleErrorEvent(new ArgvInput(['console.php', 'test:run', '--foo=baz', 'buzz']), $this->getOutput(), $error, new Command('test:run')));
     }
 
     public function testOnConsoleErrorWithNoCommandAndNoInputString()
@@ -49,7 +49,7 @@ class ErrorListenerTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('error')
-            ->with('An error occurred while using the console. Message: "{message}"', array('exception' => $error, 'message' => 'An error occurred'))
+            ->with('An error occurred while using the console. Message: "{message}"', ['exception' => $error, 'message' => 'An error occurred'])
         ;
 
         $listener = new ErrorListener($logger);
@@ -62,11 +62,11 @@ class ErrorListenerTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Command "{command}" exited with code "{code}"', array('command' => 'test:run', 'code' => 255))
+            ->with('Command "{command}" exited with code "{code}"', ['command' => 'test:run', 'code' => 255])
         ;
 
         $listener = new ErrorListener($logger);
-        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(array('console.php', 'test:run')), 255));
+        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(['console.php', 'test:run']), 255));
     }
 
     public function testOnConsoleTerminateForZeroExitCodeDoesNotWriteToLog()
@@ -78,16 +78,16 @@ class ErrorListenerTest extends TestCase
         ;
 
         $listener = new ErrorListener($logger);
-        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(array('console.php', 'test:run')), 0));
+        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(['console.php', 'test:run']), 0));
     }
 
     public function testGetSubscribedEvents()
     {
         $this->assertEquals(
-            array(
-                'console.error' => array('onConsoleError', -128),
-                'console.terminate' => array('onConsoleTerminate', -128),
-            ),
+            [
+                'console.error' => ['onConsoleError', -128],
+                'console.terminate' => ['onConsoleTerminate', -128],
+            ],
             ErrorListener::getSubscribedEvents()
         );
     }
@@ -98,12 +98,12 @@ class ErrorListenerTest extends TestCase
         $logger
             ->expects($this->exactly(3))
             ->method('debug')
-            ->with('Command "{command}" exited with code "{code}"', array('command' => 'test:run --foo=bar', 'code' => 255))
+            ->with('Command "{command}" exited with code "{code}"', ['command' => 'test:run --foo=bar', 'code' => 255])
         ;
 
         $listener = new ErrorListener($logger);
-        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(array('console.php', 'test:run', '--foo=bar')), 255));
-        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArrayInput(array('name' => 'test:run', '--foo' => 'bar')), 255));
+        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArgvInput(['console.php', 'test:run', '--foo=bar']), 255));
+        $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new ArrayInput(['name' => 'test:run', '--foo' => 'bar']), 255));
         $listener->onConsoleTerminate($this->getConsoleTerminateEvent(new StringInput('test:run --foo=bar'), 255));
     }
 
@@ -113,7 +113,7 @@ class ErrorListenerTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Command "{command}" exited with code "{code}"', array('command' => 'test:run', 'code' => 255))
+            ->with('Command "{command}" exited with code "{code}"', ['command' => 'test:run', 'code' => 255])
         ;
 
         $listener = new ErrorListener($logger);
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand1.php b/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand1.php
index ede05d7a73..14bb20486e 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand1.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand1.php
@@ -19,7 +19,7 @@ class DescriptorCommand1 extends Command
     {
         $this
             ->setName('descriptor:command1')
-            ->setAliases(array('alias1', 'alias2'))
+            ->setAliases(['alias1', 'alias2'])
             ->setDescription('command 1 description')
             ->setHelp('command 1 help')
         ;
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand4.php b/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand4.php
index 13e8e5ba04..22dcae0e3c 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand4.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/DescriptorCommand4.php
@@ -19,7 +19,7 @@ class DescriptorCommand4 extends Command
     {
         $this
             ->setName('descriptor:command4')
-            ->setAliases(array('descriptor:alias_command4', 'command4:descriptor'))
+            ->setAliases(['descriptor:alias_command4', 'command4:descriptor'])
         ;
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/DummyOutput.php b/src/Symfony/Component/Console/Tests/Fixtures/DummyOutput.php
index 866e214371..e9cf6ce7da 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/DummyOutput.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/DummyOutput.php
@@ -25,7 +25,7 @@ class DummyOutput extends BufferedOutput
      */
     public function getLogs()
     {
-        $logs = array();
+        $logs = [];
         foreach (explode(PHP_EOL, trim($this->fetch())) as $message) {
             preg_match('/^\[(.*)\] (.*)/', $message, $matches);
             $logs[] = sprintf('%s %s', $matches[1], $matches[2]);
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Foo1Command.php b/src/Symfony/Component/Console/Tests/Fixtures/Foo1Command.php
index 254162f320..6069576d15 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Foo1Command.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Foo1Command.php
@@ -14,7 +14,7 @@ class Foo1Command extends Command
         $this
             ->setName('foo:bar1')
             ->setDescription('The foo:bar1 command')
-            ->setAliases(array('afoobar1'))
+            ->setAliases(['afoobar1'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Foo2Command.php b/src/Symfony/Component/Console/Tests/Fixtures/Foo2Command.php
index 8071dc8fb3..0d9884013e 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Foo2Command.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Foo2Command.php
@@ -11,7 +11,7 @@ class Foo2Command extends Command
         $this
             ->setName('foo1:bar')
             ->setDescription('The foo1:bar command')
-            ->setAliases(array('afoobar2'))
+            ->setAliases(['afoobar2'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/FooCommand.php b/src/Symfony/Component/Console/Tests/Fixtures/FooCommand.php
index 355e0ad6d6..3144600447 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/FooCommand.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/FooCommand.php
@@ -14,7 +14,7 @@ class FooCommand extends Command
         $this
             ->setName('foo:bar')
             ->setDescription('The foo:bar command')
-            ->setAliases(array('afoobar'))
+            ->setAliases(['afoobar'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/FooOptCommand.php b/src/Symfony/Component/Console/Tests/Fixtures/FooOptCommand.php
index 9043aa483c..c9054671f9 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/FooOptCommand.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/FooOptCommand.php
@@ -15,7 +15,7 @@ class FooOptCommand extends Command
         $this
             ->setName('foo:bar')
             ->setDescription('The foo:bar command')
-            ->setAliases(array('afoobar'))
+            ->setAliases(['afoobar'])
             ->addOption('fooopt', 'fo', InputOption::VALUE_OPTIONAL, 'fooopt description')
         ;
     }
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced1Command.php b/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced1Command.php
index fc50c72bfc..95a4e61524 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced1Command.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced1Command.php
@@ -14,7 +14,7 @@ class FooSubnamespaced1Command extends Command
         $this
             ->setName('foo:bar:baz')
             ->setDescription('The foo:bar:baz command')
-            ->setAliases(array('foobarbaz'))
+            ->setAliases(['foobarbaz'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced2Command.php b/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced2Command.php
index 1cf31ff110..08c5ff725f 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced2Command.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced2Command.php
@@ -14,7 +14,7 @@ class FooSubnamespaced2Command extends Command
         $this
             ->setName('foo:go:bret')
             ->setDescription('The foo:bar:go command')
-            ->setAliases(array('foobargo'))
+            ->setAliases(['foobargo'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4.php
index 0c5d3fb26c..b2f3d99546 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4.php
@@ -20,12 +20,12 @@ return function (InputInterface $input, OutputInterface $output) {
 
     //Ensure edge case by appending empty strings to history:
     $output->write('Lorem ipsum dolor sit amet');
-    $output->write(array('', '', ''));
+    $output->write(['', '', '']);
     $output->title('Fourth title');
 
     //Ensure have manual control over number of blank lines:
     $output->writeln('Lorem ipsum dolor sit amet');
-    $output->writeln(array('', '')); //Should append an extra blank line
+    $output->writeln(['', '']); //Should append an extra blank line
     $output->title('Fifth title');
 
     $output->writeln('Lorem ipsum dolor sit amet');
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4_with_iterators.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4_with_iterators.php
index a644fb416e..3b215c7f2c 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4_with_iterators.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_4_with_iterators.php
@@ -20,12 +20,12 @@ return function (InputInterface $input, OutputInterface $output) {
 
     //Ensure edge case by appending empty strings to history:
     $output->write('Lorem ipsum dolor sit amet');
-    $output->write(new \ArrayIterator(array('', '', '')));
+    $output->write(new \ArrayIterator(['', '', '']));
     $output->title('Fourth title');
 
     //Ensure have manual control over number of blank lines:
     $output->writeln('Lorem ipsum dolor sit amet');
-    $output->writeln(new \ArrayIterator(array('', ''))); //Should append an extra blank line
+    $output->writeln(new \ArrayIterator(['', ''])); //Should append an extra blank line
     $output->title('Fifth title');
 
     $output->writeln('Lorem ipsum dolor sit amet');
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_5.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_5.php
index 96433ed5b3..6fba5737fc 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_5.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_5.php
@@ -9,29 +9,29 @@ return function (InputInterface $input, OutputInterface $output) {
     $output = new SymfonyStyle($input, $output);
 
     $output->writeln('Lorem ipsum dolor sit amet');
-    $output->listing(array(
+    $output->listing([
         'Lorem ipsum dolor sit amet',
         'consectetur adipiscing elit',
-    ));
+    ]);
 
     //Even using write:
     $output->write('Lorem ipsum dolor sit amet');
-    $output->listing(array(
+    $output->listing([
         'Lorem ipsum dolor sit amet',
         'consectetur adipiscing elit',
-    ));
+    ]);
 
     $output->write('Lorem ipsum dolor sit amet');
-    $output->text(array(
+    $output->text([
         'Lorem ipsum dolor sit amet',
         'consectetur adipiscing elit',
-    ));
+    ]);
 
     $output->newLine();
 
     $output->write('Lorem ipsum dolor sit amet');
-    $output->comment(array(
+    $output->comment([
         'Lorem ipsum dolor sit amet',
         'consectetur adipiscing elit',
-    ));
+    ]);
 };
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_6.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_6.php
index 8031ec9c30..3278f6ea05 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_6.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_6.php
@@ -8,9 +8,9 @@ use Symfony\Component\Console\Style\SymfonyStyle;
 return function (InputInterface $input, OutputInterface $output) {
     $output = new SymfonyStyle($input, $output);
 
-    $output->listing(array(
+    $output->listing([
         'Lorem ipsum dolor sit amet',
         'consectetur adipiscing elit',
-    ));
+    ]);
     $output->success('Lorem ipsum dolor sit amet');
 };
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_7.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_7.php
index 203eb5b12e..037c6ab6b3 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_7.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_7.php
@@ -9,7 +9,7 @@ return function (InputInterface $input, OutputInterface $output) {
     $output = new SymfonyStyle($input, $output);
     $output->title('Title');
     $output->askHidden('Hidden question');
-    $output->choice('Choice question with default', array('choice1', 'choice2'), 'choice1');
+    $output->choice('Choice question with default', ['choice1', 'choice2'], 'choice1');
     $output->confirm('Confirmation with yes default', true);
     $output->text('Duis aute irure dolor in reprehenderit in voluptate velit esse');
 };
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_8.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_8.php
index 16b26b523f..fe9d484d25 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_8.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_8.php
@@ -7,19 +7,19 @@ use Symfony\Component\Console\Style\SymfonyStyle;
 
 //Ensure formatting tables when using multiple headers with TableCell
 return function (InputInterface $input, OutputInterface $output) {
-    $headers = array(
-        array(new TableCell('Main table title', array('colspan' => 3))),
-        array('ISBN', 'Title', 'Author'),
-    );
+    $headers = [
+        [new TableCell('Main table title', ['colspan' => 3])],
+        ['ISBN', 'Title', 'Author'],
+    ];
 
-    $rows = array(
-        array(
+    $rows = [
+        [
             '978-0521567817',
             'De Monarchia',
-            new TableCell("Dante Alighieri\nspans multiple rows", array('rowspan' => 2)),
-        ),
-        array('978-0804169127', 'Divine Comedy'),
-    );
+            new TableCell("Dante Alighieri\nspans multiple rows", ['rowspan' => 2]),
+        ],
+        ['978-0804169127', 'Divine Comedy'],
+    ];
 
     $output = new SymfonyStyle($input, $output);
     $output->table($headers, $rows);
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
index 57afdf06b4..73af4ae1e2 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/Style/SymfonyStyle/command/command_9.php
@@ -7,5 +7,5 @@ use Symfony\Component\Console\Style\SymfonyStyle;
 //Ensure that all lines are aligned to the begin of the first line in a multi-line block
 return function (InputInterface $input, OutputInterface $output) {
     $output = new SymfonyStyle($input, $output);
-    $output->block(array('Custom block', 'Second custom block line'), 'CUSTOM', 'fg=white;bg=green', 'X ', true);
+    $output->block(['Custom block', 'Second custom block line'], 'CUSTOM', 'fg=white;bg=green', 'X ', true);
 };
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/TestCommand.php b/src/Symfony/Component/Console/Tests/Fixtures/TestCommand.php
index dcd32739c4..eb7ccb33f6 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/TestCommand.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/TestCommand.php
@@ -10,7 +10,7 @@ class TestCommand extends Command
     {
         $this
             ->setName('namespace:name')
-            ->setAliases(array('name'))
+            ->setAliases(['name'])
             ->setDescription('description')
             ->setHelp('help')
         ;
diff --git a/src/Symfony/Component/Console/Tests/Fixtures/TestToto.php b/src/Symfony/Component/Console/Tests/Fixtures/TestToto.php
index f14805db68..2e6a819593 100644
--- a/src/Symfony/Component/Console/Tests/Fixtures/TestToto.php
+++ b/src/Symfony/Component/Console/Tests/Fixtures/TestToto.php
@@ -11,7 +11,7 @@ class TestToto extends Command
         $this
             ->setName('test-toto')
             ->setDescription('The test-toto command')
-            ->setAliases(array('test'))
+            ->setAliases(['test'])
         ;
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
index 4f2c73415d..d4559e8def 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterStyleTest.php
@@ -18,10 +18,10 @@ class OutputFormatterStyleTest extends TestCase
 {
     public function testConstructor()
     {
-        $style = new OutputFormatterStyle('green', 'black', array('bold', 'underscore'));
+        $style = new OutputFormatterStyle('green', 'black', ['bold', 'underscore']);
         $this->assertEquals("\033[32;40;1;4mfoo\033[39;49;22;24m", $style->apply('foo'));
 
-        $style = new OutputFormatterStyle('red', null, array('blink'));
+        $style = new OutputFormatterStyle('red', null, ['blink']);
         $this->assertEquals("\033[31;5mfoo\033[39;25m", $style->apply('foo'));
 
         $style = new OutputFormatterStyle(null, 'white');
@@ -66,7 +66,7 @@ class OutputFormatterStyleTest extends TestCase
     {
         $style = new OutputFormatterStyle();
 
-        $style->setOptions(array('reverse', 'conceal'));
+        $style->setOptions(['reverse', 'conceal']);
         $this->assertEquals("\033[7;8mfoo\033[27;28m", $style->apply('foo'));
 
         $style->setOption('bold');
@@ -78,7 +78,7 @@ class OutputFormatterStyleTest extends TestCase
         $style->setOption('bold');
         $this->assertEquals("\033[8;1mfoo\033[28;22m", $style->apply('foo'));
 
-        $style->setOptions(array('bold'));
+        $style->setOptions(['bold']);
         $this->assertEquals("\033[1mfoo\033[22m", $style->apply('foo'));
 
         try {
diff --git a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
index 030c9c1fab..0d81207392 100644
--- a/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
+++ b/src/Symfony/Component/Console/Tests/Formatter/OutputFormatterTest.php
@@ -184,26 +184,26 @@ class OutputFormatterTest extends TestCase
 
     public function provideInlineStyleOptionsCases()
     {
-        return array(
-            array('<unknown=_unknown_>'),
-            array('<unknown=_unknown_;a=1;b>'),
-            array('<fg=green;>', "\033[32m[test]\033[39m", '[test]'),
-            array('<fg=green;bg=blue;>', "\033[32;44ma\033[39;49m", 'a'),
-            array('<fg=green;options=bold>', "\033[32;1mb\033[39;22m", 'b'),
-            array('<fg=green;options=reverse;>', "\033[32;7m<a>\033[39;27m", '<a>'),
-            array('<fg=green;options=bold,underscore>', "\033[32;1;4mz\033[39;22;24m", 'z'),
-            array('<fg=green;options=bold,underscore,reverse;>', "\033[32;1;4;7md\033[39;22;24;27m", 'd'),
-        );
+        return [
+            ['<unknown=_unknown_>'],
+            ['<unknown=_unknown_;a=1;b>'],
+            ['<fg=green;>', "\033[32m[test]\033[39m", '[test]'],
+            ['<fg=green;bg=blue;>', "\033[32;44ma\033[39;49m", 'a'],
+            ['<fg=green;options=bold>', "\033[32;1mb\033[39;22m", 'b'],
+            ['<fg=green;options=reverse;>', "\033[32;7m<a>\033[39;27m", '<a>'],
+            ['<fg=green;options=bold,underscore>', "\033[32;1;4mz\033[39;22;24m", 'z'],
+            ['<fg=green;options=bold,underscore,reverse;>', "\033[32;1;4;7md\033[39;22;24;27m", 'd'],
+        ];
     }
 
     public function provideInlineStyleTagsWithUnknownOptions()
     {
-        return array(
-            array('<options=abc;>', 'abc'),
-            array('<options=abc,def;>', 'abc'),
-            array('<fg=green;options=xyz;>', 'xyz'),
-            array('<fg=green;options=efg,abc>', 'efg'),
-        );
+        return [
+            ['<options=abc;>', 'abc'],
+            ['<options=abc,def;>', 'abc'],
+            ['<fg=green;options=xyz;>', 'xyz'],
+            ['<fg=green;options=efg,abc>', 'efg'],
+        ];
     }
 
     public function testNonStyleTag()
diff --git a/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
index f5d891a1a3..934e11ac1b 100644
--- a/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/FormatterHelperTest.php
@@ -40,7 +40,7 @@ class FormatterHelperTest extends TestCase
         $this->assertEquals(
             '<error> Some text to display </error>'."\n".
             '<error> foo bar              </error>',
-            $formatter->formatBlock(array('Some text to display', 'foo bar'), 'error'),
+            $formatter->formatBlock(['Some text to display', 'foo bar'], 'error'),
             '::formatBlock() formats a message in a block'
         );
 
diff --git a/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php b/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
index 0fdb2cefbe..826bc51dcd 100644
--- a/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/HelperSetTest.php
@@ -20,7 +20,7 @@ class HelperSetTest extends TestCase
     public function testConstructor()
     {
         $mock_helper = $this->getGenericMockHelper('fake_helper');
-        $helperset = new HelperSet(array('fake_helper_alias' => $mock_helper));
+        $helperset = new HelperSet(['fake_helper_alias' => $mock_helper]);
 
         $this->assertEquals($mock_helper, $helperset->get('fake_helper_alias'), '__construct sets given helper to helpers');
         $this->assertTrue($helperset->has('fake_helper_alias'), '__construct sets helper alias for given helper');
@@ -46,7 +46,7 @@ class HelperSetTest extends TestCase
 
     public function testHas()
     {
-        $helperset = new HelperSet(array('fake_helper_alias' => $this->getGenericMockHelper('fake_helper')));
+        $helperset = new HelperSet(['fake_helper_alias' => $this->getGenericMockHelper('fake_helper')]);
         $this->assertTrue($helperset->has('fake_helper'), '->has() finds set helper');
         $this->assertTrue($helperset->has('fake_helper_alias'), '->has() finds set helper by alias');
     }
@@ -55,7 +55,7 @@ class HelperSetTest extends TestCase
     {
         $helper_01 = $this->getGenericMockHelper('fake_helper_01');
         $helper_02 = $this->getGenericMockHelper('fake_helper_02');
-        $helperset = new HelperSet(array('fake_helper_01_alias' => $helper_01, 'fake_helper_02_alias' => $helper_02));
+        $helperset = new HelperSet(['fake_helper_01_alias' => $helper_01, 'fake_helper_02_alias' => $helper_02]);
         $this->assertEquals($helper_01, $helperset->get('fake_helper_01'), '->get() returns correct helper by name');
         $this->assertEquals($helper_01, $helperset->get('fake_helper_01_alias'), '->get() returns correct helper by alias');
         $this->assertEquals($helper_02, $helperset->get('fake_helper_02'), '->get() returns correct helper by name');
@@ -101,7 +101,7 @@ class HelperSetTest extends TestCase
         $helperset->set($this->getGenericMockHelper('fake_helper_01', $helperset));
         $helperset->set($this->getGenericMockHelper('fake_helper_02', $helperset));
 
-        $helpers = array('fake_helper_01', 'fake_helper_02');
+        $helpers = ['fake_helper_01', 'fake_helper_02'];
         $i = 0;
 
         foreach ($helperset as $helper) {
diff --git a/src/Symfony/Component/Console/Tests/Helper/HelperTest.php b/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
index 1847582444..184d86e092 100644
--- a/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/HelperTest.php
@@ -18,28 +18,28 @@ class HelperTest extends TestCase
 {
     public function formatTimeProvider()
     {
-        return array(
-            array(0,      '< 1 sec'),
-            array(1,      '1 sec'),
-            array(2,      '2 secs'),
-            array(59,     '59 secs'),
-            array(60,     '1 min'),
-            array(61,     '1 min'),
-            array(119,    '1 min'),
-            array(120,    '2 mins'),
-            array(121,    '2 mins'),
-            array(3599,   '59 mins'),
-            array(3600,   '1 hr'),
-            array(7199,   '1 hr'),
-            array(7200,   '2 hrs'),
-            array(7201,   '2 hrs'),
-            array(86399,  '23 hrs'),
-            array(86400,  '1 day'),
-            array(86401,  '1 day'),
-            array(172799, '1 day'),
-            array(172800, '2 days'),
-            array(172801, '2 days'),
-        );
+        return [
+            [0,      '< 1 sec'],
+            [1,      '1 sec'],
+            [2,      '2 secs'],
+            [59,     '59 secs'],
+            [60,     '1 min'],
+            [61,     '1 min'],
+            [119,    '1 min'],
+            [120,    '2 mins'],
+            [121,    '2 mins'],
+            [3599,   '59 mins'],
+            [3600,   '1 hr'],
+            [7199,   '1 hr'],
+            [7200,   '2 hrs'],
+            [7201,   '2 hrs'],
+            [86399,  '23 hrs'],
+            [86400,  '1 day'],
+            [86401,  '1 day'],
+            [172799, '1 day'],
+            [172800, '2 days'],
+            [172801, '2 days'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
index 829bc43307..5387a9e3c2 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProcessHelperTest.php
@@ -30,7 +30,7 @@ class ProcessHelperTest extends TestCase
         }
 
         $helper = new ProcessHelper();
-        $helper->setHelperSet(new HelperSet(array(new DebugFormatterHelper())));
+        $helper->setHelperSet(new HelperSet([new DebugFormatterHelper()]));
         $output = $this->getOutputStream($verbosity);
         $helper->run($output, $cmd, $error);
         $this->assertEquals($expected, $this->getOutput($output));
@@ -39,13 +39,13 @@ class ProcessHelperTest extends TestCase
     public function testPassedCallbackIsExecuted()
     {
         $helper = new ProcessHelper();
-        $helper->setHelperSet(new HelperSet(array(new DebugFormatterHelper())));
+        $helper->setHelperSet(new HelperSet([new DebugFormatterHelper()]));
         $output = $this->getOutputStream(StreamOutput::VERBOSITY_NORMAL);
 
         $executed = false;
         $callback = function () use (&$executed) { $executed = true; };
 
-        $helper->run($output, array('php', '-r', 'echo 42;'), null, $callback);
+        $helper->run($output, ['php', '-r', 'echo 42;'], null, $callback);
         $this->assertTrue($executed);
     }
 
@@ -96,27 +96,27 @@ EOT;
 EOT;
 
         $errorMessage = 'An error occurred';
-        $args = new Process(array('php', '-r', 'echo 42;'));
+        $args = new Process(['php', '-r', 'echo 42;']);
         $args = $args->getCommandLine();
         $successOutputProcessDebug = str_replace("'php' '-r' 'echo 42;'", $args, $successOutputProcessDebug);
-        $fromShellCommandline = \method_exists(Process::class, 'fromShellCommandline') ? array(Process::class, 'fromShellCommandline') : function ($cmd) { return new Process($cmd); };
+        $fromShellCommandline = \method_exists(Process::class, 'fromShellCommandline') ? [Process::class, 'fromShellCommandline'] : function ($cmd) { return new Process($cmd); };
 
-        return array(
-            array('', 'php -r "echo 42;"', StreamOutput::VERBOSITY_VERBOSE, null),
-            array($successOutputVerbose, 'php -r "echo 42;"', StreamOutput::VERBOSITY_VERY_VERBOSE, null),
-            array($successOutputDebug, 'php -r "echo 42;"', StreamOutput::VERBOSITY_DEBUG, null),
-            array($successOutputDebugWithTags, 'php -r "echo \'<info>42</info>\';"', StreamOutput::VERBOSITY_DEBUG, null),
-            array('', 'php -r "syntax error"', StreamOutput::VERBOSITY_VERBOSE, null),
-            array($syntaxErrorOutputVerbose, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERY_VERBOSE, null),
-            array($syntaxErrorOutputDebug, 'php -r "fwrite(STDERR, \'error message\');usleep(500000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_DEBUG, null),
-            array($errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERBOSE, $errorMessage),
-            array($syntaxErrorOutputVerbose.$errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERY_VERBOSE, $errorMessage),
-            array($syntaxErrorOutputDebug.$errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(500000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_DEBUG, $errorMessage),
-            array($successOutputProcessDebug, array('php', '-r', 'echo 42;'), StreamOutput::VERBOSITY_DEBUG, null),
-            array($successOutputDebug, $fromShellCommandline('php -r "echo 42;"'), StreamOutput::VERBOSITY_DEBUG, null),
-            array($successOutputProcessDebug, array(new Process(array('php', '-r', 'echo 42;'))), StreamOutput::VERBOSITY_DEBUG, null),
-            array($successOutputPhp, array($fromShellCommandline('php -r '.$PHP), 'PHP' => 'echo 42;'), StreamOutput::VERBOSITY_DEBUG, null),
-        );
+        return [
+            ['', 'php -r "echo 42;"', StreamOutput::VERBOSITY_VERBOSE, null],
+            [$successOutputVerbose, 'php -r "echo 42;"', StreamOutput::VERBOSITY_VERY_VERBOSE, null],
+            [$successOutputDebug, 'php -r "echo 42;"', StreamOutput::VERBOSITY_DEBUG, null],
+            [$successOutputDebugWithTags, 'php -r "echo \'<info>42</info>\';"', StreamOutput::VERBOSITY_DEBUG, null],
+            ['', 'php -r "syntax error"', StreamOutput::VERBOSITY_VERBOSE, null],
+            [$syntaxErrorOutputVerbose, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERY_VERBOSE, null],
+            [$syntaxErrorOutputDebug, 'php -r "fwrite(STDERR, \'error message\');usleep(500000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_DEBUG, null],
+            [$errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERBOSE, $errorMessage],
+            [$syntaxErrorOutputVerbose.$errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(50000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_VERY_VERBOSE, $errorMessage],
+            [$syntaxErrorOutputDebug.$errorMessage.PHP_EOL, 'php -r "fwrite(STDERR, \'error message\');usleep(500000);fwrite(STDOUT, \'out message\');exit(252);"', StreamOutput::VERBOSITY_DEBUG, $errorMessage],
+            [$successOutputProcessDebug, ['php', '-r', 'echo 42;'], StreamOutput::VERBOSITY_DEBUG, null],
+            [$successOutputDebug, $fromShellCommandline('php -r "echo 42;"'), StreamOutput::VERBOSITY_DEBUG, null],
+            [$successOutputProcessDebug, [new Process(['php', '-r', 'echo 42;'])], StreamOutput::VERBOSITY_DEBUG, null],
+            [$successOutputPhp, [$fromShellCommandline('php -r '.$PHP), 'PHP' => 'echo 42;'], StreamOutput::VERBOSITY_DEBUG, null],
+        ];
     }
 
     private function getOutputStream($verbosity)
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
index d35f336d9c..d4aa3e9f36 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressBarTest.php
@@ -314,7 +314,7 @@ class ProgressBarTest extends TestCase
 
     public function testOverwriteWithSectionOutput()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream(true);
         $output = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
 
@@ -336,7 +336,7 @@ class ProgressBarTest extends TestCase
 
     public function testOverwriteMultipleProgressBarsWithSectionOutputs()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream(true);
         $output1 = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
         $output2 = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
@@ -365,7 +365,7 @@ class ProgressBarTest extends TestCase
 
     public function testMultipleSectionsWithCustomFormat()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream(true);
         $output1 = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
         $output2 = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
@@ -859,12 +859,12 @@ class ProgressBarTest extends TestCase
      */
     public function provideFormat()
     {
-        return array(
-            array('normal'),
-            array('verbose'),
-            array('very_verbose'),
-            array('debug'),
-        );
+        return [
+            ['normal'],
+            ['verbose'],
+            ['very_verbose'],
+            ['debug'],
+        ];
     }
 
     protected function getOutputStream($decorated = true, $verbosity = StreamOutput::VERBOSITY_NORMAL)
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
index c85018dece..6c6f86f36e 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressIndicatorTest.php
@@ -79,7 +79,7 @@ class ProgressIndicatorTest extends TestCase
 
     public function testCustomIndicatorValues()
     {
-        $bar = new ProgressIndicator($output = $this->getOutputStream(), null, 100, array('a', 'b', 'c'));
+        $bar = new ProgressIndicator($output = $this->getOutputStream(), null, 100, ['a', 'b', 'c']);
 
         $bar->start('Starting...');
         usleep(101000);
@@ -106,7 +106,7 @@ class ProgressIndicatorTest extends TestCase
      */
     public function testCannotSetInvalidIndicatorCharacters()
     {
-        $bar = new ProgressIndicator($this->getOutputStream(), null, 100, array('1'));
+        $bar = new ProgressIndicator($this->getOutputStream(), null, 100, ['1']);
     }
 
     /**
@@ -161,12 +161,12 @@ class ProgressIndicatorTest extends TestCase
      */
     public function provideFormat()
     {
-        return array(
-            array('normal'),
-            array('verbose'),
-            array('very_verbose'),
-            array('debug'),
-        );
+        return [
+            ['normal'],
+            ['verbose'],
+            ['very_verbose'],
+            ['debug'],
+        ];
     }
 
     protected function getOutputStream($decorated = true, $verbosity = StreamOutput::VERBOSITY_NORMAL)
diff --git a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
index 3cb9a09968..de3ec4559b 100644
--- a/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/QuestionHelperTest.php
@@ -29,10 +29,10 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
     {
         $questionHelper = new QuestionHelper();
 
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $questionHelper->setHelperSet($helperSet);
 
-        $heroes = array('Superman', 'Batman', 'Spiderman');
+        $heroes = ['Superman', 'Batman', 'Spiderman'];
 
         $inputStream = $this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n");
 
@@ -68,21 +68,21 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
-        $this->assertEquals(array('Superman', 'Spiderman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
-        $this->assertEquals(array('Superman', 'Spiderman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0,1');
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, ' 0 , 1 ');
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, 0);
         // We are supposed to get the default value since we are not in interactive mode
@@ -93,11 +93,11 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
     {
         $questionHelper = new QuestionHelper();
 
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $questionHelper->setHelperSet($helperSet);
         $inputStream = $this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n");
 
-        $heroes = array('Superman', 'Batman', 'Spiderman');
+        $heroes = ['Superman', 'Batman', 'Spiderman'];
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0');
 
@@ -122,16 +122,16 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
         $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, 1');
         $question->setMultiselect(true);
-        $this->assertSame(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
+        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, 1');
         $question->setMultiselect(true);
         $question->setValidator(null);
-        $this->assertSame(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
+        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, '0, Batman');
         $question->setMultiselect(true);
-        $this->assertSame(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
+        $this->assertSame(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream, false), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('Who are your favorite superheros?', $heroes, null);
         $question->setMultiselect(true);
@@ -179,11 +179,11 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
         $inputStream = $this->getInputStream("Acm\nAc\177\177s\tTest\n\n\033[A\033[A\n\033[A\033[A\033[A\033[A\033[A\tTest\n\033[B\nS\177\177\033[B\033[B\nF00\177\177oo\t\n");
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new Question('Please select a bundle', 'FrameworkBundle');
-        $question->setAutocompleterValues(array('AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle'));
+        $question->setAutocompleterValues(['AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle']);
 
         $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
         $this->assertEquals('AsseticBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
@@ -205,9 +205,9 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
         $inputStream = $this->getInputStream("\033[A\033[A\n\033[B\033[B\n");
 
         $dialog = new QuestionHelper();
-        $dialog->setHelperSet(new HelperSet(array(new FormatterHelper())));
+        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));
 
-        $question = new ChoiceQuestion('Please select a bundle', array(1 => 'AcmeDemoBundle', 4 => 'AsseticBundle'));
+        $question = new ChoiceQuestion('Please select a bundle', [1 => 'AcmeDemoBundle', 4 => 'AsseticBundle']);
         $question->setMaxAttempts(1);
 
         $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
@@ -222,14 +222,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
         $inputStream = $this->getInputStream("b\n");
 
-        $possibleChoices = array(
+        $possibleChoices = [
             'a' => 'berlin',
             'b' => 'copenhagen',
             'c' => 'amsterdam',
-        );
+        ];
 
         $dialog = new QuestionHelper();
-        $dialog->setHelperSet(new HelperSet(array(new FormatterHelper())));
+        $dialog->setHelperSet(new HelperSet([new FormatterHelper()]));
 
         $question = new ChoiceQuestion('Please select a city', $possibleChoices);
         $question->setMaxAttempts(1);
@@ -246,12 +246,12 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
         $inputStream = $this->getInputStream('E');
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new Question('');
         $expectedCompletion = 'ExampleNamespace\\';
-        $question->setAutocompleterValues(array($expectedCompletion));
+        $question->setAutocompleterValues([$expectedCompletion]);
 
         $output = $this->createOutputInterface();
         $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $output, $question);
@@ -262,11 +262,11 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
         // Shell control (esc) sequences are not so important: we only care that
         // <hl> tag is interpreted correctly and replaced
-        $irrelevantEscSequences = array(
+        $irrelevantEscSequences = [
             "\0337" => '', // Save cursor position
             "\0338" => '', // Restore cursor position
             "\033[K" => '', // Clear line from cursor till the end
-        );
+        ];
 
         $importantActualOutput = strtr($actualOutput, $irrelevantEscSequences);
 
@@ -304,14 +304,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
     public function getAskConfirmationData()
     {
-        return array(
-            array('', true),
-            array('', false, false),
-            array('y', true),
-            array('yes', true),
-            array('n', false),
-            array('no', false),
-        );
+        return [
+            ['', true],
+            ['', false, false],
+            ['y', true],
+            ['yes', true],
+            ['n', false],
+            ['no', false],
+        ];
     }
 
     public function testAskConfirmationWithCustomTrueAnswer()
@@ -328,12 +328,12 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
     public function testAskAndValidate()
     {
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $error = 'This is not a color!';
         $validator = function ($color) use ($error) {
-            if (!\in_array($color, array('white', 'black'))) {
+            if (!\in_array($color, ['white', 'black'])) {
                 throw new \InvalidArgumentException($error);
             }
 
@@ -361,14 +361,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testSelectChoiceFromSimpleChoices($providedAnswer, $expectedValue)
     {
-        $possibleChoices = array(
+        $possibleChoices = [
             'My environment 1',
             'My environment 2',
             'My environment 3',
-        );
+        ];
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
@@ -380,14 +380,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
     public function simpleAnswerProvider()
     {
-        return array(
-            array(0, 'My environment 1'),
-            array(1, 'My environment 2'),
-            array(2, 'My environment 3'),
-            array('My environment 1', 'My environment 1'),
-            array('My environment 2', 'My environment 2'),
-            array('My environment 3', 'My environment 3'),
-        );
+        return [
+            [0, 'My environment 1'],
+            [1, 'My environment 2'],
+            [2, 'My environment 3'],
+            ['My environment 1', 'My environment 1'],
+            ['My environment 2', 'My environment 2'],
+            ['My environment 3', 'My environment 3'],
+        ];
     }
 
     /**
@@ -395,14 +395,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testSpecialCharacterChoiceFromMultipleChoiceList($providedAnswer, $expectedValue)
     {
-        $possibleChoices = array(
+        $possibleChoices = [
             '.',
             'src',
-        );
+        ];
 
         $dialog = new QuestionHelper();
         $inputStream = $this->getInputStream($providedAnswer."\n");
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new ChoiceQuestion('Please select the directory', $possibleChoices);
@@ -415,10 +415,10 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
     public function specialCharacterInMultipleChoice()
     {
-        return array(
-            array('.', array('.')),
-            array('., src', array('.', 'src')),
-        );
+        return [
+            ['.', ['.']],
+            ['., src', ['.', 'src']],
+        ];
     }
 
     /**
@@ -426,15 +426,15 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testChoiceFromChoicelistWithMixedKeys($providedAnswer, $expectedValue)
     {
-        $possibleChoices = array(
+        $possibleChoices = [
             '0' => 'No environment',
             '1' => 'My environment 1',
             'env_2' => 'My environment 2',
             3 => 'My environment 3',
-        );
+        ];
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
@@ -446,14 +446,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
     public function mixedKeysChoiceListAnswerProvider()
     {
-        return array(
-            array('0', '0'),
-            array('No environment', '0'),
-            array('1', '1'),
-            array('env_2', 'env_2'),
-            array(3, '3'),
-            array('My environment 1', '1'),
-        );
+        return [
+            ['0', '0'],
+            ['No environment', '0'],
+            ['1', '1'],
+            ['env_2', 'env_2'],
+            [3, '3'],
+            ['My environment 1', '1'],
+        ];
     }
 
     /**
@@ -461,14 +461,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testSelectChoiceFromChoiceList($providedAnswer, $expectedValue)
     {
-        $possibleChoices = array(
+        $possibleChoices = [
             'env_1' => 'My environment 1',
             'env_2' => 'My environment',
             'env_3' => 'My environment',
-        );
+        ];
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
@@ -484,14 +484,14 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testAmbiguousChoiceFromChoicelist()
     {
-        $possibleChoices = array(
+        $possibleChoices = [
             'env_1' => 'My first environment',
             'env_2' => 'My environment',
             'env_3' => 'My environment',
-        );
+        ];
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new ChoiceQuestion('Please select the environment to load', $possibleChoices);
@@ -502,12 +502,12 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
 
     public function answerProvider()
     {
-        return array(
-            array('env_1', 'env_1'),
-            array('env_2', 'env_2'),
-            array('env_3', 'env_3'),
-            array('My environment 1', 'env_1'),
-        );
+        return [
+            ['env_1', 'env_1'],
+            ['env_2', 'env_2'],
+            ['env_3', 'env_3'],
+            ['My environment 1', 'env_1'],
+        ];
     }
 
     public function testNoInteraction()
@@ -523,22 +523,22 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
     public function testChoiceOutputFormattingQuestionForUtf8Keys()
     {
         $question = 'Lorem ipsum?';
-        $possibleChoices = array(
+        $possibleChoices = [
             'foo' => 'foo',
             'żółw' => 'bar',
             'łabądź' => 'baz',
-        );
-        $outputShown = array(
+        ];
+        $outputShown = [
             $question,
             '  [<info>foo   </info>] foo',
             '  [<info>żółw  </info>] bar',
             '  [<info>łabądź</info>] baz',
-        );
+        ];
         $output = $this->getMockBuilder('\Symfony\Component\Console\Output\OutputInterface')->getMock();
         $output->method('getFormatter')->willReturn(new OutputFormatter());
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $output->expects($this->once())->method('writeln')->with($this->equalTo($outputShown));
@@ -581,7 +581,7 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
      */
     public function testEmptyChoices()
     {
-        new ChoiceQuestion('Question', array(), 'irrelevant');
+        new ChoiceQuestion('Question', [], 'irrelevant');
     }
 
     public function testTraversableAutocomplete()
@@ -601,11 +601,11 @@ class QuestionHelperTest extends AbstractQuestionHelperTest
         $inputStream = $this->getInputStream("Acm\nAc\177\177s\tTest\n\n\033[A\033[A\n\033[A\033[A\033[A\033[A\033[A\tTest\n\033[B\nS\177\177\033[B\033[B\nF00\177\177oo\t\n");
 
         $dialog = new QuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $dialog->setHelperSet($helperSet);
 
         $question = new Question('Please select a bundle', 'FrameworkBundle');
-        $question->setAutocompleterValues(new AutocompleteValues(array('irrelevant' => 'AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle')));
+        $question->setAutocompleterValues(new AutocompleteValues(['irrelevant' => 'AcmeDemoBundle', 'AsseticBundle', 'SecurityBundle', 'FooBundle']));
 
         $this->assertEquals('AcmeDemoBundle', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
         $this->assertEquals('AsseticBundleTest', $dialog->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
diff --git a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
index 9406e5b863..e7fd806064 100644
--- a/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/SymfonyQuestionHelperTest.php
@@ -18,10 +18,10 @@ class SymfonyQuestionHelperTest extends AbstractQuestionHelperTest
     {
         $questionHelper = new SymfonyQuestionHelper();
 
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $questionHelper->setHelperSet($helperSet);
 
-        $heroes = array('Superman', 'Batman', 'Spiderman');
+        $heroes = ['Superman', 'Batman', 'Spiderman'];
 
         $inputStream = $this->getInputStream("\n1\n  1  \nFabien\n1\nFabien\n1\n0,2\n 0 , 2  \n\n\n");
 
@@ -55,31 +55,31 @@ class SymfonyQuestionHelperTest extends AbstractQuestionHelperTest
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
-        $this->assertEquals(array('Superman', 'Spiderman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
-        $this->assertEquals(array('Superman', 'Spiderman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Spiderman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $this->createOutputInterface(), $question));
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, '0,1');
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));
         $this->assertOutputContains('What is your favorite superhero? [Superman, Batman]', $output);
 
         $question = new ChoiceQuestion('What is your favorite superhero?', $heroes, ' 0 , 1 ');
         $question->setMaxAttempts(1);
         $question->setMultiselect(true);
 
-        $this->assertEquals(array('Superman', 'Batman'), $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));
+        $this->assertEquals(['Superman', 'Batman'], $questionHelper->ask($this->createStreamableInputInterfaceMock($inputStream), $output = $this->createOutputInterface(), $question));
         $this->assertOutputContains('What is your favorite superhero? [Superman, Batman]', $output);
     }
 
     public function testAskChoiceWithChoiceValueAsDefault()
     {
         $questionHelper = new SymfonyQuestionHelper();
-        $helperSet = new HelperSet(array(new FormatterHelper()));
+        $helperSet = new HelperSet([new FormatterHelper()]);
         $questionHelper->setHelperSet($helperSet);
-        $question = new ChoiceQuestion('What is your favorite superhero?', array('Superman', 'Batman', 'Spiderman'), 'Batman');
+        $question = new ChoiceQuestion('What is your favorite superhero?', ['Superman', 'Batman', 'Spiderman'], 'Batman');
         $question->setMaxAttempts(1);
 
         $this->assertSame('Batman', $questionHelper->ask($this->createStreamableInputInterfaceMock($this->getInputStream("Batman\n")), $output = $this->createOutputInterface(), $question));
diff --git a/src/Symfony/Component/Console/Tests/Helper/TableTest.php b/src/Symfony/Component/Console/Tests/Helper/TableTest.php
index eb67eedfcf..43b90fd073 100644
--- a/src/Symfony/Component/Console/Tests/Helper/TableTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/TableTest.php
@@ -87,16 +87,16 @@ class TableTest extends TestCase
 
     public function renderProvider()
     {
-        $books = array(
-            array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-            array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
-            array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-            array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-        );
+        $books = [
+            ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+            ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
+            ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+            ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+        ];
 
-        return array(
-            array(
-                array('ISBN', 'Title', 'Author'),
+        return [
+            [
+                ['ISBN', 'Title', 'Author'],
                 $books,
                 'default',
 <<<'TABLE'
@@ -110,9 +110,9 @@ class TableTest extends TestCase
 +---------------+--------------------------+------------------+
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title', 'Author'),
+            ],
+            [
+                ['ISBN', 'Title', 'Author'],
                 $books,
                 'compact',
 <<<'TABLE'
@@ -123,9 +123,9 @@ TABLE
  80-902734-1-6 And Then There Were None Agatha Christie  
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title', 'Author'),
+            ],
+            [
+                ['ISBN', 'Title', 'Author'],
                 $books,
                 'borderless',
 <<<'TABLE'
@@ -139,9 +139,9 @@ TABLE
  =============== ========================== ================== 
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title', 'Author'),
+            ],
+            [
+                ['ISBN', 'Title', 'Author'],
                 $books,
                 'box',
                 <<<'TABLE'
@@ -155,16 +155,16 @@ TABLE
 └───────────────┴──────────────────────────┴──────────────────┘
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-                    array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
+            ],
+            [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+                    ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
                     new TableSeparator(),
-                    array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-                    array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-                ),
+                    ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+                    ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+                ],
                 'box-double',
                 <<<'TABLE'
 ╔═══════════════╤══════════════════════════╤══════════════════╗
@@ -178,15 +178,15 @@ TABLE
 ╚═══════════════╧══════════════════════════╧══════════════════╝
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title'),
-                array(
-                    array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-                    array('9971-5-0210-0'),
-                    array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-                    array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-                ),
+            ],
+            [
+                ['ISBN', 'Title'],
+                [
+                    ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+                    ['9971-5-0210-0'],
+                    ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+                    ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+--------------------------+------------------+
@@ -199,15 +199,15 @@ TABLE
 +---------------+--------------------------+------------------+
 
 TABLE
-            ),
-            array(
-                array(),
-                array(
-                    array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-                    array('9971-5-0210-0'),
-                    array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-                    array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-                ),
+            ],
+            [
+                [],
+                [
+                    ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+                    ['9971-5-0210-0'],
+                    ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+                    ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+--------------------------+------------------+
@@ -218,15 +218,15 @@ TABLE
 +---------------+--------------------------+------------------+
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array('99921-58-10-7', "Divine\nComedy", 'Dante Alighieri'),
-                    array('9971-5-0210-2', "Harry Potter\nand the Chamber of Secrets", "Rowling\nJoanne K."),
-                    array('9971-5-0210-2', "Harry Potter\nand the Chamber of Secrets", "Rowling\nJoanne K."),
-                    array('960-425-059-0', 'The Lord of the Rings', "J. R. R.\nTolkien"),
-                ),
+            ],
+            [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    ['99921-58-10-7', "Divine\nComedy", 'Dante Alighieri'],
+                    ['9971-5-0210-2', "Harry Potter\nand the Chamber of Secrets", "Rowling\nJoanne K."],
+                    ['9971-5-0210-2', "Harry Potter\nand the Chamber of Secrets", "Rowling\nJoanne K."],
+                    ['960-425-059-0', 'The Lord of the Rings', "J. R. R.\nTolkien"],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+----------------------------+-----------------+
@@ -243,10 +243,10 @@ TABLE
 +---------------+----------------------------+-----------------+
 
 TABLE
-            ),
-            array(
-                array('ISBN', 'Title'),
-                array(),
+            ],
+            [
+                ['ISBN', 'Title'],
+                [],
                 'default',
 <<<'TABLE'
 +------+-------+
@@ -254,19 +254,19 @@ TABLE
 +------+-------+
 
 TABLE
-            ),
-            array(
-                array(),
-                array(),
+            ],
+            [
+                [],
+                [],
                 'default',
                 '',
-            ),
-            'Cell text with tags used for Output styling' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array('<info>99921-58-10-7</info>', '<error>Divine Comedy</error>', '<fg=blue;bg=white>Dante Alighieri</fg=blue;bg=white>'),
-                    array('9971-5-0210-0', 'A Tale of Two Cities', '<info>Charles Dickens</>'),
-                ),
+            ],
+            'Cell text with tags used for Output styling' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    ['<info>99921-58-10-7</info>', '<error>Divine Comedy</error>', '<fg=blue;bg=white>Dante Alighieri</fg=blue;bg=white>'],
+                    ['9971-5-0210-0', 'A Tale of Two Cities', '<info>Charles Dickens</>'],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+----------------------+-----------------+
@@ -277,13 +277,13 @@ TABLE
 +---------------+----------------------+-----------------+
 
 TABLE
-            ),
-            'Cell text with tags not used for Output styling' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array('<strong>99921-58-10-700</strong>', '<f>Divine Com</f>', 'Dante Alighieri'),
-                    array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
-                ),
+            ],
+            'Cell text with tags not used for Output styling' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    ['<strong>99921-58-10-700</strong>', '<f>Divine Com</f>', 'Dante Alighieri'],
+                    ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
+                ],
                 'default',
 <<<'TABLE'
 +----------------------------------+----------------------+-----------------+
@@ -294,28 +294,28 @@ TABLE
 +----------------------------------+----------------------+-----------------+
 
 TABLE
-            ),
-            'Cell with colspan' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
+            ],
+            'Cell with colspan' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
                     new TableSeparator(),
-                    array(new TableCell('Divine Comedy(Dante Alighieri)', array('colspan' => 3))),
+                    [new TableCell('Divine Comedy(Dante Alighieri)', ['colspan' => 3])],
                     new TableSeparator(),
-                    array(
-                        new TableCell('Arduino: A Quick-Start Guide', array('colspan' => 2)),
+                    [
+                        new TableCell('Arduino: A Quick-Start Guide', ['colspan' => 2]),
                         'Mark Schmidt',
-                    ),
+                    ],
                     new TableSeparator(),
-                    array(
+                    [
                         '9971-5-0210-0',
-                        new TableCell("A Tale of \nTwo Cities", array('colspan' => 2)),
-                    ),
+                        new TableCell("A Tale of \nTwo Cities", ['colspan' => 2]),
+                    ],
                     new TableSeparator(),
-                    array(
-                        new TableCell('Cupiditate dicta atque porro, tempora exercitationem modi animi nulla nemo vel nihil!', array('colspan' => 3)),
-                    ),
-                ),
+                    [
+                        new TableCell('Cupiditate dicta atque porro, tempora exercitationem modi animi nulla nemo vel nihil!', ['colspan' => 3]),
+                    ],
+                ],
                 'default',
 <<<'TABLE'
 +-------------------------------+-------------------------------+-----------------------------+
@@ -334,21 +334,21 @@ TABLE
 +-------------------------------+-------------------------------+-----------------------------+
 
 TABLE
-            ),
-            'Cell with rowspan' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array(
-                        new TableCell('9971-5-0210-0', array('rowspan' => 3)),
-                        new TableCell('Divine Comedy', array('rowspan' => 2)),
+            ],
+            'Cell with rowspan' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    [
+                        new TableCell('9971-5-0210-0', ['rowspan' => 3]),
+                        new TableCell('Divine Comedy', ['rowspan' => 2]),
                         'Dante Alighieri',
-                    ),
-                    array(),
-                    array("The Lord of \nthe Rings", "J. R. \nR. Tolkien"),
+                    ],
+                    [],
+                    ["The Lord of \nthe Rings", "J. R. \nR. Tolkien"],
                     new TableSeparator(),
-                    array('80-902734-1-6', new TableCell("And Then \nThere \nWere None", array('rowspan' => 3)), 'Agatha Christie'),
-                    array('80-902734-1-7', 'Test'),
-                ),
+                    ['80-902734-1-6', new TableCell("And Then \nThere \nWere None", ['rowspan' => 3]), 'Agatha Christie'],
+                    ['80-902734-1-7', 'Test'],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+---------------+-----------------+
@@ -365,23 +365,23 @@ TABLE
 +---------------+---------------+-----------------+
 
 TABLE
-            ),
-            'Cell with rowspan and colspan' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array(
-                        new TableCell('9971-5-0210-0', array('rowspan' => 2, 'colspan' => 2)),
+            ],
+            'Cell with rowspan and colspan' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    [
+                        new TableCell('9971-5-0210-0', ['rowspan' => 2, 'colspan' => 2]),
                         'Dante Alighieri',
-                    ),
-                    array('Charles Dickens'),
+                    ],
+                    ['Charles Dickens'],
                     new TableSeparator(),
-                    array(
+                    [
                         'Dante Alighieri',
-                        new TableCell('9971-5-0210-0', array('rowspan' => 3, 'colspan' => 2)),
-                    ),
-                    array('J. R. R. Tolkien'),
-                    array('J. R. R'),
-                ),
+                        new TableCell('9971-5-0210-0', ['rowspan' => 3, 'colspan' => 2]),
+                    ],
+                    ['J. R. R. Tolkien'],
+                    ['J. R. R'],
+                ],
                 'default',
 <<<'TABLE'
 +------------------+---------+-----------------+
@@ -396,27 +396,27 @@ TABLE
 +------------------+---------+-----------------+
 
 TABLE
-            ),
-            'Cell with rowspan and colspan contains new line break' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array(
-                        new TableCell("9971\n-5-\n021\n0-0", array('rowspan' => 2, 'colspan' => 2)),
+            ],
+            'Cell with rowspan and colspan contains new line break' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    [
+                        new TableCell("9971\n-5-\n021\n0-0", ['rowspan' => 2, 'colspan' => 2]),
                         'Dante Alighieri',
-                    ),
-                    array('Charles Dickens'),
+                    ],
+                    ['Charles Dickens'],
                     new TableSeparator(),
-                    array(
+                    [
                         'Dante Alighieri',
-                        new TableCell("9971\n-5-\n021\n0-0", array('rowspan' => 2, 'colspan' => 2)),
-                    ),
-                    array('Charles Dickens'),
+                        new TableCell("9971\n-5-\n021\n0-0", ['rowspan' => 2, 'colspan' => 2]),
+                    ],
+                    ['Charles Dickens'],
                     new TableSeparator(),
-                    array(
-                        new TableCell("9971\n-5-\n021\n0-0", array('rowspan' => 2, 'colspan' => 2)),
-                        new TableCell("Dante \nAlighieri", array('rowspan' => 2, 'colspan' => 1)),
-                    ),
-                ),
+                    [
+                        new TableCell("9971\n-5-\n021\n0-0", ['rowspan' => 2, 'colspan' => 2]),
+                        new TableCell("Dante \nAlighieri", ['rowspan' => 2, 'colspan' => 1]),
+                    ],
+                ],
                 'default',
 <<<'TABLE'
 +-----------------+-------+-----------------+
@@ -439,21 +439,21 @@ TABLE
 +-----------------+-------+-----------------+
 
 TABLE
-            ),
-            'Cell with rowspan and colspan without using TableSeparator' => array(
-                array('ISBN', 'Title', 'Author'),
-                array(
-                    array(
-                        new TableCell("9971\n-5-\n021\n0-0", array('rowspan' => 2, 'colspan' => 2)),
+            ],
+            'Cell with rowspan and colspan without using TableSeparator' => [
+                ['ISBN', 'Title', 'Author'],
+                [
+                    [
+                        new TableCell("9971\n-5-\n021\n0-0", ['rowspan' => 2, 'colspan' => 2]),
                         'Dante Alighieri',
-                    ),
-                    array('Charles Dickens'),
-                    array(
+                    ],
+                    ['Charles Dickens'],
+                    [
                         'Dante Alighieri',
-                        new TableCell("9971\n-5-\n021\n0-0", array('rowspan' => 2, 'colspan' => 2)),
-                    ),
-                    array('Charles Dickens'),
-                ),
+                        new TableCell("9971\n-5-\n021\n0-0", ['rowspan' => 2, 'colspan' => 2]),
+                    ],
+                    ['Charles Dickens'],
+                ],
                 'default',
 <<<'TABLE'
 +-----------------+-------+-----------------+
@@ -470,17 +470,17 @@ TABLE
 +-----------------+-------+-----------------+
 
 TABLE
-            ),
-            'Cell with rowspan and colspan with separator inside a rowspan' => array(
-                array('ISBN', 'Author'),
-                array(
-                    array(
-                        new TableCell('9971-5-0210-0', array('rowspan' => 3, 'colspan' => 1)),
+            ],
+            'Cell with rowspan and colspan with separator inside a rowspan' => [
+                ['ISBN', 'Author'],
+                [
+                    [
+                        new TableCell('9971-5-0210-0', ['rowspan' => 3, 'colspan' => 1]),
                         'Dante Alighieri',
-                    ),
-                    array(new TableSeparator()),
-                    array('Charles Dickens'),
-                ),
+                    ],
+                    [new TableSeparator()],
+                    ['Charles Dickens'],
+                ],
                 'default',
 <<<'TABLE'
 +---------------+-----------------+
@@ -492,13 +492,13 @@ TABLE
 +---------------+-----------------+
 
 TABLE
-            ),
-            'Multiple header lines' => array(
-                array(
-                    array(new TableCell('Main title', array('colspan' => 3))),
-                    array('ISBN', 'Title', 'Author'),
-                ),
-                array(),
+            ],
+            'Multiple header lines' => [
+                [
+                    [new TableCell('Main title', ['colspan' => 3])],
+                    ['ISBN', 'Title', 'Author'],
+                ],
+                [],
                 'default',
 <<<'TABLE'
 +------+-------+--------+
@@ -508,17 +508,17 @@ TABLE
 +------+-------+--------+
 
 TABLE
-            ),
-            'Row with multiple cells' => array(
-                array(),
-                array(
-                    array(
-                        new TableCell('1', array('colspan' => 3)),
-                        new TableCell('2', array('colspan' => 2)),
-                        new TableCell('3', array('colspan' => 2)),
-                        new TableCell('4', array('colspan' => 2)),
-                    ),
-        ),
+            ],
+            'Row with multiple cells' => [
+                [],
+                [
+                    [
+                        new TableCell('1', ['colspan' => 3]),
+                        new TableCell('2', ['colspan' => 2]),
+                        new TableCell('3', ['colspan' => 2]),
+                        new TableCell('4', ['colspan' => 2]),
+                    ],
+        ],
                 'default',
 <<<'TABLE'
 +---+--+--+---+--+---+--+---+--+
@@ -526,22 +526,22 @@ TABLE
 +---+--+--+---+--+---+--+---+--+
 
 TABLE
-            ),
-            'Coslpan and table cells with comment style' => array(
-                array(
-                    new TableCell('<comment>Long Title</comment>', array('colspan' => 3)),
-                ),
-                array(
-                    array(
-                        new TableCell('9971-5-0210-0', array('colspan' => 3)),
-                    ),
+            ],
+            'Coslpan and table cells with comment style' => [
+                [
+                    new TableCell('<comment>Long Title</comment>', ['colspan' => 3]),
+                ],
+                [
+                    [
+                        new TableCell('9971-5-0210-0', ['colspan' => 3]),
+                    ],
                     new TableSeparator(),
-                    array(
+                    [
                         'Dante Alighieri',
                         'J. R. R. Tolkien',
                         'J. R. R',
-                    ),
-                ),
+                    ],
+                ],
                 'default',
                 <<<TABLE
 +-----------------+------------------+---------+
@@ -555,22 +555,22 @@ TABLE
 TABLE
             ,
                 true,
-            ),
-            'Row with formatted cells containing a newline' => array(
-                array(),
-                array(
-                    array(
-                        new TableCell('<error>Dont break'."\n".'here</error>', array('colspan' => 2)),
-                    ),
+            ],
+            'Row with formatted cells containing a newline' => [
+                [],
+                [
+                    [
+                        new TableCell('<error>Dont break'."\n".'here</error>', ['colspan' => 2]),
+                    ],
                     new TableSeparator(),
-                    array(
+                    [
                         'foo',
-                         new TableCell('<error>Dont break'."\n".'here</error>', array('rowspan' => 2)),
-                    ),
-                    array(
+                         new TableCell('<error>Dont break'."\n".'here</error>', ['rowspan' => 2]),
+                    ],
+                    [
                         'bar',
-                    ),
-                ),
+                    ],
+                ],
                 'default',
                 <<<'TABLE'
 +-------+------------+
@@ -584,16 +584,16 @@ TABLE
 TABLE
             ,
                 true,
-            ),
-        );
+            ],
+        ];
     }
 
     public function testRenderMultiByte()
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('■■'))
-            ->setRows(array(array(1234)))
+            ->setHeaders(['■■'])
+            ->setRows([[1234]])
             ->setStyle('default')
         ;
         $table->render();
@@ -615,7 +615,7 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
 
-        $table->setRows(array(array(new TableCell(12345))));
+        $table->setRows([[new TableCell(12345)]]);
         $table->render();
 
         $expected =
@@ -633,7 +633,7 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
 
-        $table->setRows(array(array(new TableCell(12345.01))));
+        $table->setRows([[new TableCell(12345.01)]]);
         $table->render();
 
         $expected =
@@ -659,8 +659,8 @@ TABLE;
         Table::setStyleDefinition('dotfull', $style);
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('Foo'))
-            ->setRows(array(array('Bar')))
+            ->setHeaders(['Foo'])
+            ->setRows([['Bar']])
             ->setStyle('dotfull');
         $table->render();
 
@@ -681,14 +681,14 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('Foo'))
-            ->setRows(array(
-                array('Bar1'),
+            ->setHeaders(['Foo'])
+            ->setRows([
+                ['Bar1'],
                 new TableSeparator(),
-                array('Bar2'),
+                ['Bar2'],
                 new TableSeparator(),
-                array('Bar3'),
-            ));
+                ['Bar3'],
+            ]);
         $table->render();
 
         $expected =
@@ -713,9 +713,9 @@ TABLE;
     public function testRenderMultiCalls()
     {
         $table = new Table($output = $this->getOutputStream());
-        $table->setRows(array(
-            array(new TableCell('foo', array('colspan' => 2))),
-        ));
+        $table->setRows([
+            [new TableCell('foo', ['colspan' => 2])],
+        ]);
         $table->render();
         $table->render();
         $table->render();
@@ -741,11 +741,11 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-                array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'),
-            ));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+                ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'],
+            ]);
 
         $style = new TableStyle();
         $style->setPadType(STR_PAD_LEFT);
@@ -775,10 +775,10 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', array(), 'Dante Alighieri', '9.95'),
-            ));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', [], 'Dante Alighieri', '9.95'],
+            ]);
 
         $table->render();
     }
@@ -787,11 +787,11 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-                array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'),
-            ))
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+                ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'],
+            ])
             ->setColumnWidth(0, 15)
             ->setColumnWidth(3, 10);
 
@@ -819,12 +819,12 @@ TABLE;
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-                array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'),
-            ))
-            ->setColumnWidths(array(15, 0, -1, 10));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+                ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'],
+            ])
+            ->setColumnWidths([15, 0, -1, 10]);
 
         $style = new TableStyle();
         $style->setPadType(STR_PAD_LEFT);
@@ -848,19 +848,19 @@ TABLE;
 
     public function testSectionOutput()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream(true);
         $output = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
         $table = new Table($output);
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-            ));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+            ]);
 
         $table->render();
 
-        $table->appendRow(array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'));
+        $table->appendRow(['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25']);
 
         $expected =
             <<<TABLE
@@ -883,17 +883,17 @@ TABLE;
 
     public function testSectionOutputDoesntClearIfTableIsntRendered()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream(true);
         $output = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
         $table = new Table($output);
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-            ));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+            ]);
 
-        $table->appendRow(array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'));
+        $table->appendRow(['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25']);
 
         $expected =
             <<<TABLE
@@ -911,19 +911,19 @@ TABLE;
 
     public function testSectionOutputWithoutDecoration()
     {
-        $sections = array();
+        $sections = [];
         $stream = $this->getOutputStream();
         $output = new ConsoleSectionOutput($stream->getStream(), $sections, $stream->getVerbosity(), $stream->isDecorated(), new OutputFormatter());
         $table = new Table($output);
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author', 'Price'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'),
-            ));
+            ->setHeaders(['ISBN', 'Title', 'Author', 'Price'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri', '9.95'],
+            ]);
 
         $table->render();
 
-        $table->appendRow(array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'));
+        $table->appendRow(['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25']);
 
         $expected =
             <<<TABLE
@@ -952,7 +952,7 @@ TABLE;
     {
         $table = new Table($this->getOutputStream());
 
-        $table->appendRow(array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25'));
+        $table->appendRow(['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens', '139.25']);
     }
 
     /**
@@ -982,13 +982,13 @@ TABLE;
         (new Table($output = $this->getOutputStream()))
             ->setHeaderTitle($headerTitle)
             ->setFooterTitle($footerTitle)
-            ->setHeaders(array('ISBN', 'Title', 'Author'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
-                array('9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'),
-                array('960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'),
-                array('80-902734-1-6', 'And Then There Were None', 'Agatha Christie'),
-            ))
+            ->setHeaders(['ISBN', 'Title', 'Author'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
+                ['9971-5-0210-0', 'A Tale of Two Cities', 'Charles Dickens'],
+                ['960-425-059-0', 'The Lord of the Rings', 'J. R. R. Tolkien'],
+                ['80-902734-1-6', 'And Then There Were None', 'Agatha Christie'],
+            ])
             ->setStyle($style)
             ->render()
         ;
@@ -998,8 +998,8 @@ TABLE;
 
     public function renderSetTitle()
     {
-        return array(
-            array(
+        return [
+            [
                 'Books',
                 'Page 1/2',
                 'default',
@@ -1014,8 +1014,8 @@ TABLE;
 +---------------+--------- Page 1/2 -------+------------------+
 
 TABLE
-            ),
-            array(
+            ],
+            [
                 'Books',
                 'Page 1/2',
                 'box',
@@ -1030,8 +1030,8 @@ TABLE
 └───────────────┴───────── Page 1/2 ───────┴──────────────────┘
 
 TABLE
-            ),
-            array(
+            ],
+            [
                 'Boooooooooooooooooooooooooooooooooooooooooooooooooooooooks',
                 'Page 1/999999999999999999999999999999999999999999999999999',
                 'default',
@@ -1046,17 +1046,17 @@ TABLE
 +- Page 1/99999999999999999999999999999999999999999999999... -+
 
 TABLE
-            ),
-        );
+            ],
+        ];
     }
 
     public function testColumnMaxWidths()
     {
         $table = new Table($output = $this->getOutputStream());
         $table
-            ->setRows(array(
-                array('Divine Comedy', 'A Tale of Two Cities', 'The Lord of the Rings', 'And Then There Were None'),
-            ))
+            ->setRows([
+                ['Divine Comedy', 'A Tale of Two Cities', 'The Lord of the Rings', 'And Then There Were None'],
+            ])
             ->setColumnMaxWidth(1, 5)
             ->setColumnMaxWidth(2, 10)
             ->setColumnMaxWidth(3, 15);
@@ -1089,12 +1089,12 @@ TABLE;
         $table = new Table($output = $this->getOutputStream());
         $table->setStyle($boxed);
         $table
-            ->setHeaders(array('ISBN', 'Title', 'Author'))
-            ->setRows(array(
-                array('99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'),
+            ->setHeaders(['ISBN', 'Title', 'Author'])
+            ->setRows([
+                ['99921-58-10-7', 'Divine Comedy', 'Dante Alighieri'],
                 new TableSeparator(),
-                array(new TableCell('This value spans 3 columns.', array('colspan' => 3))),
-            ))
+                [new TableCell('This value spans 3 columns.', ['colspan' => 3])],
+            ])
         ;
         $table->render();
 
diff --git a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
index b91b6d71df..37caaf2d1c 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArgvInputTest.php
@@ -21,23 +21,23 @@ class ArgvInputTest extends TestCase
 {
     public function testConstructor()
     {
-        $_SERVER['argv'] = array('cli.php', 'foo');
+        $_SERVER['argv'] = ['cli.php', 'foo'];
         $input = new ArgvInput();
         $r = new \ReflectionObject($input);
         $p = $r->getProperty('tokens');
         $p->setAccessible(true);
 
-        $this->assertEquals(array('foo'), $p->getValue($input), '__construct() automatically get its input from the argv server variable');
+        $this->assertEquals(['foo'], $p->getValue($input), '__construct() automatically get its input from the argv server variable');
     }
 
     public function testParseArguments()
     {
-        $input = new ArgvInput(array('cli.php', 'foo'));
-        $input->bind(new InputDefinition(array(new InputArgument('name'))));
-        $this->assertEquals(array('name' => 'foo'), $input->getArguments(), '->parse() parses required arguments');
+        $input = new ArgvInput(['cli.php', 'foo']);
+        $input->bind(new InputDefinition([new InputArgument('name')]));
+        $this->assertEquals(['name' => 'foo'], $input->getArguments(), '->parse() parses required arguments');
 
-        $input->bind(new InputDefinition(array(new InputArgument('name'))));
-        $this->assertEquals(array('name' => 'foo'), $input->getArguments(), '->parse() is stateless');
+        $input->bind(new InputDefinition([new InputArgument('name')]));
+        $this->assertEquals(['name' => 'foo'], $input->getArguments(), '->parse() is stateless');
     }
 
     /**
@@ -53,128 +53,128 @@ class ArgvInputTest extends TestCase
 
     public function provideOptions()
     {
-        return array(
-            array(
-                array('cli.php', '--foo'),
-                array(new InputOption('foo')),
-                array('foo' => true),
+        return [
+            [
+                ['cli.php', '--foo'],
+                [new InputOption('foo')],
+                ['foo' => true],
                 '->parse() parses long options without a value',
-            ),
-            array(
-                array('cli.php', '--foo=bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['cli.php', '--foo=bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)],
+                ['foo' => 'bar'],
                 '->parse() parses long options with a required value (with a = separator)',
-            ),
-            array(
-                array('cli.php', '--foo', 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['cli.php', '--foo', 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)],
+                ['foo' => 'bar'],
                 '->parse() parses long options with a required value (with a space separator)',
-            ),
-            array(
-                array('cli.php', '--foo='),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)),
-                array('foo' => ''),
+            ],
+            [
+                ['cli.php', '--foo='],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)],
+                ['foo' => ''],
                 '->parse() parses long options with optional value which is empty (with a = separator) as empty string',
-            ),
-            array(
-                array('cli.php', '--foo=', 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)),
-                array('foo' => ''),
+            ],
+            [
+                ['cli.php', '--foo=', 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)],
+                ['foo' => ''],
                 '->parse() parses long options with optional value without value specified or an empty string (with a = separator) followed by an argument as empty string',
-            ),
-            array(
-                array('cli.php', 'bar', '--foo'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)),
-                array('foo' => null),
+            ],
+            [
+                ['cli.php', 'bar', '--foo'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)],
+                ['foo' => null],
                 '->parse() parses long options with optional value which is empty (with a = separator) preceded by an argument',
-            ),
-            array(
-                array('cli.php', '--foo', '', 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)),
-                array('foo' => ''),
+            ],
+            [
+                ['cli.php', '--foo', '', 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)],
+                ['foo' => ''],
                 '->parse() parses long options with optional value which is empty as empty string even followed by an argument',
-            ),
-            array(
-                array('cli.php', '--foo'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)),
-                array('foo' => null),
+            ],
+            [
+                ['cli.php', '--foo'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)],
+                ['foo' => null],
                 '->parse() parses long options with optional value specified with no separator and no value as null',
-            ),
-            array(
-                array('cli.php', '-f'),
-                array(new InputOption('foo', 'f')),
-                array('foo' => true),
+            ],
+            [
+                ['cli.php', '-f'],
+                [new InputOption('foo', 'f')],
+                ['foo' => true],
                 '->parse() parses short options without a value',
-            ),
-            array(
-                array('cli.php', '-fbar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['cli.php', '-fbar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)],
+                ['foo' => 'bar'],
                 '->parse() parses short options with a required value (with no separator)',
-            ),
-            array(
-                array('cli.php', '-f', 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['cli.php', '-f', 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)],
+                ['foo' => 'bar'],
                 '->parse() parses short options with a required value (with a space separator)',
-            ),
-            array(
-                array('cli.php', '-f', ''),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)),
-                array('foo' => ''),
+            ],
+            [
+                ['cli.php', '-f', ''],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)],
+                ['foo' => ''],
                 '->parse() parses short options with an optional empty value',
-            ),
-            array(
-                array('cli.php', '-f', '', 'foo'),
-                array(new InputArgument('name'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)),
-                array('foo' => ''),
+            ],
+            [
+                ['cli.php', '-f', '', 'foo'],
+                [new InputArgument('name'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)],
+                ['foo' => ''],
                 '->parse() parses short options with an optional empty value followed by an argument',
-            ),
-            array(
-                array('cli.php', '-f', '', '-b'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b')),
-                array('foo' => '', 'bar' => true),
+            ],
+            [
+                ['cli.php', '-f', '', '-b'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b')],
+                ['foo' => '', 'bar' => true],
                 '->parse() parses short options with an optional empty value followed by an option',
-            ),
-            array(
-                array('cli.php', '-f', '-b', 'foo'),
-                array(new InputArgument('name'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b')),
-                array('foo' => null, 'bar' => true),
+            ],
+            [
+                ['cli.php', '-f', '-b', 'foo'],
+                [new InputArgument('name'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b')],
+                ['foo' => null, 'bar' => true],
                 '->parse() parses short options with an optional value which is not present',
-            ),
-            array(
-                array('cli.php', '-fb'),
-                array(new InputOption('foo', 'f'), new InputOption('bar', 'b')),
-                array('foo' => true, 'bar' => true),
+            ],
+            [
+                ['cli.php', '-fb'],
+                [new InputOption('foo', 'f'), new InputOption('bar', 'b')],
+                ['foo' => true, 'bar' => true],
                 '->parse() parses short options when they are aggregated as a single one',
-            ),
-            array(
-                array('cli.php', '-fb', 'bar'),
-                array(new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_REQUIRED)),
-                array('foo' => true, 'bar' => 'bar'),
+            ],
+            [
+                ['cli.php', '-fb', 'bar'],
+                [new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_REQUIRED)],
+                ['foo' => true, 'bar' => 'bar'],
                 '->parse() parses short options when they are aggregated as a single one and the last one has a required value',
-            ),
-            array(
-                array('cli.php', '-fb', 'bar'),
-                array(new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)),
-                array('foo' => true, 'bar' => 'bar'),
+            ],
+            [
+                ['cli.php', '-fb', 'bar'],
+                [new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)],
+                ['foo' => true, 'bar' => 'bar'],
                 '->parse() parses short options when they are aggregated as a single one and the last one has an optional value',
-            ),
-            array(
-                array('cli.php', '-fbbar'),
-                array(new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)),
-                array('foo' => true, 'bar' => 'bar'),
+            ],
+            [
+                ['cli.php', '-fbbar'],
+                [new InputOption('foo', 'f'), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)],
+                ['foo' => true, 'bar' => 'bar'],
                 '->parse() parses short options when they are aggregated as a single one and the last one has an optional value with no separator',
-            ),
-            array(
-                array('cli.php', '-fbbar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)),
-                array('foo' => 'bbar', 'bar' => null),
+            ],
+            [
+                ['cli.php', '-fbbar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputOption('bar', 'b', InputOption::VALUE_OPTIONAL)],
+                ['foo' => 'bbar', 'bar' => null],
                 '->parse() parses short options when they are aggregated as a single one and one of them takes a value',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -195,162 +195,162 @@ class ArgvInputTest extends TestCase
 
     public function provideInvalidInput()
     {
-        return array(
-            array(
-                array('cli.php', '--foo'),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED))),
+        return [
+            [
+                ['cli.php', '--foo'],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)]),
                 'The "--foo" option requires a value.',
-            ),
-            array(
-                array('cli.php', '-f'),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED))),
+            ],
+            [
+                ['cli.php', '-f'],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)]),
                 'The "--foo" option requires a value.',
-            ),
-            array(
-                array('cli.php', '-ffoo'),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_NONE))),
+            ],
+            [
+                ['cli.php', '-ffoo'],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_NONE)]),
                 'The "-o" option does not exist.',
-            ),
-            array(
-                array('cli.php', '--foo=bar'),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_NONE))),
+            ],
+            [
+                ['cli.php', '--foo=bar'],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_NONE)]),
                 'The "--foo" option does not accept a value.',
-            ),
-            array(
-                array('cli.php', 'foo', 'bar'),
+            ],
+            [
+                ['cli.php', 'foo', 'bar'],
                 new InputDefinition(),
                 'No arguments expected, got "foo".',
-            ),
-            array(
-                array('cli.php', 'foo', 'bar'),
-                new InputDefinition(array(new InputArgument('number'))),
+            ],
+            [
+                ['cli.php', 'foo', 'bar'],
+                new InputDefinition([new InputArgument('number')]),
                 'Too many arguments, expected arguments "number".',
-            ),
-            array(
-                array('cli.php', 'foo', 'bar', 'zzz'),
-                new InputDefinition(array(new InputArgument('number'), new InputArgument('county'))),
+            ],
+            [
+                ['cli.php', 'foo', 'bar', 'zzz'],
+                new InputDefinition([new InputArgument('number'), new InputArgument('county')]),
                 'Too many arguments, expected arguments "number" "county".',
-            ),
-            array(
-                array('cli.php', '--foo'),
+            ],
+            [
+                ['cli.php', '--foo'],
                 new InputDefinition(),
                 'The "--foo" option does not exist.',
-            ),
-            array(
-                array('cli.php', '-f'),
+            ],
+            [
+                ['cli.php', '-f'],
                 new InputDefinition(),
                 'The "-f" option does not exist.',
-            ),
-            array(
-                array('cli.php', '-1'),
-                new InputDefinition(array(new InputArgument('number'))),
+            ],
+            [
+                ['cli.php', '-1'],
+                new InputDefinition([new InputArgument('number')]),
                 'The "-1" option does not exist.',
-            ),
-            array(
-                array('cli.php', '-fЩ'),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_NONE))),
+            ],
+            [
+                ['cli.php', '-fЩ'],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_NONE)]),
                 'The "-Щ" option does not exist.',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testParseArrayArgument()
     {
-        $input = new ArgvInput(array('cli.php', 'foo', 'bar', 'baz', 'bat'));
-        $input->bind(new InputDefinition(array(new InputArgument('name', InputArgument::IS_ARRAY))));
+        $input = new ArgvInput(['cli.php', 'foo', 'bar', 'baz', 'bat']);
+        $input->bind(new InputDefinition([new InputArgument('name', InputArgument::IS_ARRAY)]));
 
-        $this->assertEquals(array('name' => array('foo', 'bar', 'baz', 'bat')), $input->getArguments(), '->parse() parses array arguments');
+        $this->assertEquals(['name' => ['foo', 'bar', 'baz', 'bat']], $input->getArguments(), '->parse() parses array arguments');
     }
 
     public function testParseArrayOption()
     {
-        $input = new ArgvInput(array('cli.php', '--name=foo', '--name=bar', '--name=baz'));
-        $input->bind(new InputDefinition(array(new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY))));
+        $input = new ArgvInput(['cli.php', '--name=foo', '--name=bar', '--name=baz']);
+        $input->bind(new InputDefinition([new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY)]));
 
-        $this->assertEquals(array('name' => array('foo', 'bar', 'baz')), $input->getOptions(), '->parse() parses array options ("--option=value" syntax)');
+        $this->assertEquals(['name' => ['foo', 'bar', 'baz']], $input->getOptions(), '->parse() parses array options ("--option=value" syntax)');
 
-        $input = new ArgvInput(array('cli.php', '--name', 'foo', '--name', 'bar', '--name', 'baz'));
-        $input->bind(new InputDefinition(array(new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY))));
-        $this->assertEquals(array('name' => array('foo', 'bar', 'baz')), $input->getOptions(), '->parse() parses array options ("--option value" syntax)');
+        $input = new ArgvInput(['cli.php', '--name', 'foo', '--name', 'bar', '--name', 'baz']);
+        $input->bind(new InputDefinition([new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY)]));
+        $this->assertEquals(['name' => ['foo', 'bar', 'baz']], $input->getOptions(), '->parse() parses array options ("--option value" syntax)');
 
-        $input = new ArgvInput(array('cli.php', '--name=foo', '--name=bar', '--name='));
-        $input->bind(new InputDefinition(array(new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY))));
-        $this->assertSame(array('name' => array('foo', 'bar', '')), $input->getOptions(), '->parse() parses empty array options as null ("--option=value" syntax)');
+        $input = new ArgvInput(['cli.php', '--name=foo', '--name=bar', '--name=']);
+        $input->bind(new InputDefinition([new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY)]));
+        $this->assertSame(['name' => ['foo', 'bar', '']], $input->getOptions(), '->parse() parses empty array options as null ("--option=value" syntax)');
 
-        $input = new ArgvInput(array('cli.php', '--name', 'foo', '--name', 'bar', '--name', '--anotherOption'));
-        $input->bind(new InputDefinition(array(
+        $input = new ArgvInput(['cli.php', '--name', 'foo', '--name', 'bar', '--name', '--anotherOption']);
+        $input->bind(new InputDefinition([
             new InputOption('name', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY),
             new InputOption('anotherOption', null, InputOption::VALUE_NONE),
-        )));
-        $this->assertSame(array('name' => array('foo', 'bar', null), 'anotherOption' => true), $input->getOptions(), '->parse() parses empty array options ("--option value" syntax)');
+        ]));
+        $this->assertSame(['name' => ['foo', 'bar', null], 'anotherOption' => true], $input->getOptions(), '->parse() parses empty array options ("--option value" syntax)');
     }
 
     public function testParseNegativeNumberAfterDoubleDash()
     {
-        $input = new ArgvInput(array('cli.php', '--', '-1'));
-        $input->bind(new InputDefinition(array(new InputArgument('number'))));
-        $this->assertEquals(array('number' => '-1'), $input->getArguments(), '->parse() parses arguments with leading dashes as arguments after having encountered a double-dash sequence');
+        $input = new ArgvInput(['cli.php', '--', '-1']);
+        $input->bind(new InputDefinition([new InputArgument('number')]));
+        $this->assertEquals(['number' => '-1'], $input->getArguments(), '->parse() parses arguments with leading dashes as arguments after having encountered a double-dash sequence');
 
-        $input = new ArgvInput(array('cli.php', '-f', 'bar', '--', '-1'));
-        $input->bind(new InputDefinition(array(new InputArgument('number'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL))));
-        $this->assertEquals(array('foo' => 'bar'), $input->getOptions(), '->parse() parses arguments with leading dashes as options before having encountered a double-dash sequence');
-        $this->assertEquals(array('number' => '-1'), $input->getArguments(), '->parse() parses arguments with leading dashes as arguments after having encountered a double-dash sequence');
+        $input = new ArgvInput(['cli.php', '-f', 'bar', '--', '-1']);
+        $input->bind(new InputDefinition([new InputArgument('number'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)]));
+        $this->assertEquals(['foo' => 'bar'], $input->getOptions(), '->parse() parses arguments with leading dashes as options before having encountered a double-dash sequence');
+        $this->assertEquals(['number' => '-1'], $input->getArguments(), '->parse() parses arguments with leading dashes as arguments after having encountered a double-dash sequence');
     }
 
     public function testParseEmptyStringArgument()
     {
-        $input = new ArgvInput(array('cli.php', '-f', 'bar', ''));
-        $input->bind(new InputDefinition(array(new InputArgument('empty'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL))));
+        $input = new ArgvInput(['cli.php', '-f', 'bar', '']);
+        $input->bind(new InputDefinition([new InputArgument('empty'), new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)]));
 
-        $this->assertEquals(array('empty' => ''), $input->getArguments(), '->parse() parses empty string arguments');
+        $this->assertEquals(['empty' => ''], $input->getArguments(), '->parse() parses empty string arguments');
     }
 
     public function testGetFirstArgument()
     {
-        $input = new ArgvInput(array('cli.php', '-fbbar'));
+        $input = new ArgvInput(['cli.php', '-fbbar']);
         $this->assertNull($input->getFirstArgument(), '->getFirstArgument() returns null when there is no arguments');
 
-        $input = new ArgvInput(array('cli.php', '-fbbar', 'foo'));
+        $input = new ArgvInput(['cli.php', '-fbbar', 'foo']);
         $this->assertEquals('foo', $input->getFirstArgument(), '->getFirstArgument() returns the first argument from the raw input');
     }
 
     public function testHasParameterOption()
     {
-        $input = new ArgvInput(array('cli.php', '-f', 'foo'));
+        $input = new ArgvInput(['cli.php', '-f', 'foo']);
         $this->assertTrue($input->hasParameterOption('-f'), '->hasParameterOption() returns true if the given short option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '-etest'));
+        $input = new ArgvInput(['cli.php', '-etest']);
         $this->assertTrue($input->hasParameterOption('-e'), '->hasParameterOption() returns true if the given short option is in the raw input');
         $this->assertFalse($input->hasParameterOption('-s'), '->hasParameterOption() returns true if the given short option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '--foo', 'foo'));
+        $input = new ArgvInput(['cli.php', '--foo', 'foo']);
         $this->assertTrue($input->hasParameterOption('--foo'), '->hasParameterOption() returns true if the given short option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', 'foo'));
+        $input = new ArgvInput(['cli.php', 'foo']);
         $this->assertFalse($input->hasParameterOption('--foo'), '->hasParameterOption() returns false if the given short option is not in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '--foo=bar'));
+        $input = new ArgvInput(['cli.php', '--foo=bar']);
         $this->assertTrue($input->hasParameterOption('--foo'), '->hasParameterOption() returns true if the given option with provided value is in the raw input');
     }
 
     public function testHasParameterOptionOnlyOptions()
     {
-        $input = new ArgvInput(array('cli.php', '-f', 'foo'));
+        $input = new ArgvInput(['cli.php', '-f', 'foo']);
         $this->assertTrue($input->hasParameterOption('-f', true), '->hasParameterOption() returns true if the given short option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '--foo', '--', 'foo'));
+        $input = new ArgvInput(['cli.php', '--foo', '--', 'foo']);
         $this->assertTrue($input->hasParameterOption('--foo', true), '->hasParameterOption() returns true if the given long option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '--foo=bar', 'foo'));
+        $input = new ArgvInput(['cli.php', '--foo=bar', 'foo']);
         $this->assertTrue($input->hasParameterOption('--foo', true), '->hasParameterOption() returns true if the given long option with provided value is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '--', '--foo'));
+        $input = new ArgvInput(['cli.php', '--', '--foo']);
         $this->assertFalse($input->hasParameterOption('--foo', true), '->hasParameterOption() returns false if the given option is in the raw input but after an end of options signal');
     }
 
     public function testHasParameterOptionEdgeCasesAndLimitations()
     {
-        $input = new ArgvInput(array('cli.php', '-fh'));
+        $input = new ArgvInput(['cli.php', '-fh']);
         // hasParameterOption does not know if the previous short option, -f,
         // takes a value or not. If -f takes a value, then -fh does NOT include
         // -h; Otherwise it does. Since we do not know which short options take
@@ -368,7 +368,7 @@ class ArgvInputTest extends TestCase
         // However, this is not supported.
         $this->assertFalse($input->hasParameterOption('-hf'), '->hasParameterOption() returns true if the given short option is in the raw input');
 
-        $input = new ArgvInput(array('cli.php', '-f', '-h'));
+        $input = new ArgvInput(['cli.php', '-f', '-h']);
         // If hasParameterOption('-fh') is supported for 'cli.php -fh', then
         // one might also expect that it should also be supported for
         // 'cli.php -f -h'. However, this is not supported.
@@ -377,23 +377,23 @@ class ArgvInputTest extends TestCase
 
     public function testNoWarningOnInvalidParameterOption()
     {
-        $input = new ArgvInput(array('cli.php', '-edev'));
+        $input = new ArgvInput(['cli.php', '-edev']);
 
-        $this->assertTrue($input->hasParameterOption(array('-e', '')));
+        $this->assertTrue($input->hasParameterOption(['-e', '']));
         // No warning thrown
-        $this->assertFalse($input->hasParameterOption(array('-m', '')));
+        $this->assertFalse($input->hasParameterOption(['-m', '']));
 
-        $this->assertEquals('dev', $input->getParameterOption(array('-e', '')));
+        $this->assertEquals('dev', $input->getParameterOption(['-e', '']));
         // No warning thrown
-        $this->assertFalse($input->getParameterOption(array('-m', '')));
+        $this->assertFalse($input->getParameterOption(['-m', '']));
     }
 
     public function testToString()
     {
-        $input = new ArgvInput(array('cli.php', '-f', 'foo'));
+        $input = new ArgvInput(['cli.php', '-f', 'foo']);
         $this->assertEquals('-f foo', (string) $input);
 
-        $input = new ArgvInput(array('cli.php', '-f', '--bar=foo', 'a b c d', "A\nB'C"));
+        $input = new ArgvInput(['cli.php', '-f', '--bar=foo', 'a b c d', "A\nB'C"]);
         $this->assertEquals('-f --bar=foo '.escapeshellarg('a b c d').' '.escapeshellarg("A\nB'C"), (string) $input);
     }
 
@@ -408,51 +408,51 @@ class ArgvInputTest extends TestCase
 
     public function provideGetParameterOptionValues()
     {
-        return array(
-            array(array('app/console', 'foo:bar'), '-e', 'default', false, 'default'),
-            array(array('app/console', 'foo:bar', '-e', 'dev'), '-e', 'default', false, 'dev'),
-            array(array('app/console', 'foo:bar', '--env=dev'), '--env', 'default', false, 'dev'),
-            array(array('app/console', 'foo:bar', '-e', 'dev'), array('-e', '--env'), 'default', false, 'dev'),
-            array(array('app/console', 'foo:bar', '--env=dev'), array('-e', '--env'), 'default', false, 'dev'),
-            array(array('app/console', 'foo:bar', '--env=dev', '--en=1'), array('--en'), 'default', false, '1'),
-            array(array('app/console', 'foo:bar', '--env=dev', '', '--en=1'), array('--en'), 'default', false, '1'),
-            array(array('app/console', 'foo:bar', '--env', 'val'), '--env', 'default', false, 'val'),
-            array(array('app/console', 'foo:bar', '--env', 'val', '--dummy'), '--env', 'default', false, 'val'),
-            array(array('app/console', 'foo:bar', '--', '--env=dev'), '--env', 'default', false, 'dev'),
-            array(array('app/console', 'foo:bar', '--', '--env=dev'), '--env', 'default', true, 'default'),
-        );
+        return [
+            [['app/console', 'foo:bar'], '-e', 'default', false, 'default'],
+            [['app/console', 'foo:bar', '-e', 'dev'], '-e', 'default', false, 'dev'],
+            [['app/console', 'foo:bar', '--env=dev'], '--env', 'default', false, 'dev'],
+            [['app/console', 'foo:bar', '-e', 'dev'], ['-e', '--env'], 'default', false, 'dev'],
+            [['app/console', 'foo:bar', '--env=dev'], ['-e', '--env'], 'default', false, 'dev'],
+            [['app/console', 'foo:bar', '--env=dev', '--en=1'], ['--en'], 'default', false, '1'],
+            [['app/console', 'foo:bar', '--env=dev', '', '--en=1'], ['--en'], 'default', false, '1'],
+            [['app/console', 'foo:bar', '--env', 'val'], '--env', 'default', false, 'val'],
+            [['app/console', 'foo:bar', '--env', 'val', '--dummy'], '--env', 'default', false, 'val'],
+            [['app/console', 'foo:bar', '--', '--env=dev'], '--env', 'default', false, 'dev'],
+            [['app/console', 'foo:bar', '--', '--env=dev'], '--env', 'default', true, 'default'],
+        ];
     }
 
     public function testParseSingleDashAsArgument()
     {
-        $input = new ArgvInput(array('cli.php', '-'));
-        $input->bind(new InputDefinition(array(new InputArgument('file'))));
-        $this->assertEquals(array('file' => '-'), $input->getArguments(), '->parse() parses single dash as an argument');
+        $input = new ArgvInput(['cli.php', '-']);
+        $input->bind(new InputDefinition([new InputArgument('file')]));
+        $this->assertEquals(['file' => '-'], $input->getArguments(), '->parse() parses single dash as an argument');
     }
 
     public function testParseOptionWithValueOptionalGivenEmptyAndRequiredArgument()
     {
-        $input = new ArgvInput(array('cli.php', '--foo=', 'bar'));
-        $input->bind(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED))));
-        $this->assertEquals(array('foo' => null), $input->getOptions(), '->parse() parses optional options with empty value as null');
-        $this->assertEquals(array('name' => 'bar'), $input->getArguments(), '->parse() parses required arguments');
+        $input = new ArgvInput(['cli.php', '--foo=', 'bar']);
+        $input->bind(new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)]));
+        $this->assertEquals(['foo' => null], $input->getOptions(), '->parse() parses optional options with empty value as null');
+        $this->assertEquals(['name' => 'bar'], $input->getArguments(), '->parse() parses required arguments');
 
-        $input = new ArgvInput(array('cli.php', '--foo=0', 'bar'));
-        $input->bind(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED))));
-        $this->assertEquals(array('foo' => '0'), $input->getOptions(), '->parse() parses optional options with empty value as null');
-        $this->assertEquals(array('name' => 'bar'), $input->getArguments(), '->parse() parses required arguments');
+        $input = new ArgvInput(['cli.php', '--foo=0', 'bar']);
+        $input->bind(new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::REQUIRED)]));
+        $this->assertEquals(['foo' => '0'], $input->getOptions(), '->parse() parses optional options with empty value as null');
+        $this->assertEquals(['name' => 'bar'], $input->getArguments(), '->parse() parses required arguments');
     }
 
     public function testParseOptionWithValueOptionalGivenEmptyAndOptionalArgument()
     {
-        $input = new ArgvInput(array('cli.php', '--foo=', 'bar'));
-        $input->bind(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::OPTIONAL))));
-        $this->assertEquals(array('foo' => null), $input->getOptions(), '->parse() parses optional options with empty value as null');
-        $this->assertEquals(array('name' => 'bar'), $input->getArguments(), '->parse() parses optional arguments');
+        $input = new ArgvInput(['cli.php', '--foo=', 'bar']);
+        $input->bind(new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::OPTIONAL)]));
+        $this->assertEquals(['foo' => null], $input->getOptions(), '->parse() parses optional options with empty value as null');
+        $this->assertEquals(['name' => 'bar'], $input->getArguments(), '->parse() parses optional arguments');
 
-        $input = new ArgvInput(array('cli.php', '--foo=0', 'bar'));
-        $input->bind(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::OPTIONAL))));
-        $this->assertEquals(array('foo' => '0'), $input->getOptions(), '->parse() parses optional options with empty value as null');
-        $this->assertEquals(array('name' => 'bar'), $input->getArguments(), '->parse() parses optional arguments');
+        $input = new ArgvInput(['cli.php', '--foo=0', 'bar']);
+        $input->bind(new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL), new InputArgument('name', InputArgument::OPTIONAL)]));
+        $this->assertEquals(['foo' => '0'], $input->getOptions(), '->parse() parses optional options with empty value as null');
+        $this->assertEquals(['name' => 'bar'], $input->getArguments(), '->parse() parses optional arguments');
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
index 4bc83b3caf..afe74831e3 100644
--- a/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/ArrayInputTest.php
@@ -21,47 +21,47 @@ class ArrayInputTest extends TestCase
 {
     public function testGetFirstArgument()
     {
-        $input = new ArrayInput(array());
+        $input = new ArrayInput([]);
         $this->assertNull($input->getFirstArgument(), '->getFirstArgument() returns null if no argument were passed');
-        $input = new ArrayInput(array('name' => 'Fabien'));
+        $input = new ArrayInput(['name' => 'Fabien']);
         $this->assertEquals('Fabien', $input->getFirstArgument(), '->getFirstArgument() returns the first passed argument');
-        $input = new ArrayInput(array('--foo' => 'bar', 'name' => 'Fabien'));
+        $input = new ArrayInput(['--foo' => 'bar', 'name' => 'Fabien']);
         $this->assertEquals('Fabien', $input->getFirstArgument(), '->getFirstArgument() returns the first passed argument');
     }
 
     public function testHasParameterOption()
     {
-        $input = new ArrayInput(array('name' => 'Fabien', '--foo' => 'bar'));
+        $input = new ArrayInput(['name' => 'Fabien', '--foo' => 'bar']);
         $this->assertTrue($input->hasParameterOption('--foo'), '->hasParameterOption() returns true if an option is present in the passed parameters');
         $this->assertFalse($input->hasParameterOption('--bar'), '->hasParameterOption() returns false if an option is not present in the passed parameters');
 
-        $input = new ArrayInput(array('--foo'));
+        $input = new ArrayInput(['--foo']);
         $this->assertTrue($input->hasParameterOption('--foo'), '->hasParameterOption() returns true if an option is present in the passed parameters');
 
-        $input = new ArrayInput(array('--foo', '--', '--bar'));
+        $input = new ArrayInput(['--foo', '--', '--bar']);
         $this->assertTrue($input->hasParameterOption('--bar'), '->hasParameterOption() returns true if an option is present in the passed parameters');
         $this->assertFalse($input->hasParameterOption('--bar', true), '->hasParameterOption() returns false if an option is present in the passed parameters after an end of options signal');
     }
 
     public function testGetParameterOption()
     {
-        $input = new ArrayInput(array('name' => 'Fabien', '--foo' => 'bar'));
+        $input = new ArrayInput(['name' => 'Fabien', '--foo' => 'bar']);
         $this->assertEquals('bar', $input->getParameterOption('--foo'), '->getParameterOption() returns the option of specified name');
         $this->assertEquals('default', $input->getParameterOption('--bar', 'default'), '->getParameterOption() returns the default value if an option is not present in the passed parameters');
 
-        $input = new ArrayInput(array('Fabien', '--foo' => 'bar'));
+        $input = new ArrayInput(['Fabien', '--foo' => 'bar']);
         $this->assertEquals('bar', $input->getParameterOption('--foo'), '->getParameterOption() returns the option of specified name');
 
-        $input = new ArrayInput(array('--foo', '--', '--bar' => 'woop'));
+        $input = new ArrayInput(['--foo', '--', '--bar' => 'woop']);
         $this->assertEquals('woop', $input->getParameterOption('--bar'), '->getParameterOption() returns the correct value if an option is present in the passed parameters');
         $this->assertEquals('default', $input->getParameterOption('--bar', 'default', true), '->getParameterOption() returns the default value if an option is present in the passed parameters after an end of options signal');
     }
 
     public function testParseArguments()
     {
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name')]));
 
-        $this->assertEquals(array('name' => 'foo'), $input->getArguments(), '->parse() parses required arguments');
+        $this->assertEquals(['name' => 'foo'], $input->getArguments(), '->parse() parses required arguments');
     }
 
     /**
@@ -76,50 +76,50 @@ class ArrayInputTest extends TestCase
 
     public function provideOptions()
     {
-        return array(
-            array(
-                array('--foo' => 'bar'),
-                array(new InputOption('foo')),
-                array('foo' => 'bar'),
+        return [
+            [
+                ['--foo' => 'bar'],
+                [new InputOption('foo')],
+                ['foo' => 'bar'],
                 '->parse() parses long options',
-            ),
-            array(
-                array('--foo' => 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['--foo' => 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')],
+                ['foo' => 'bar'],
                 '->parse() parses long options with a default value',
-            ),
-            array(
-                array(),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')),
-                array('foo' => 'default'),
+            ],
+            [
+                [],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')],
+                ['foo' => 'default'],
                 '->parse() uses the default value for long options with value optional which are not passed',
-            ),
-            array(
-                array('--foo' => null),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')),
-                array('foo' => null),
+            ],
+            [
+                ['--foo' => null],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')],
+                ['foo' => null],
                 '->parse() parses long options with a default value',
-            ),
-            array(
-                array('-f' => 'bar'),
-                array(new InputOption('foo', 'f')),
-                array('foo' => 'bar'),
+            ],
+            [
+                ['-f' => 'bar'],
+                [new InputOption('foo', 'f')],
+                ['foo' => 'bar'],
                 '->parse() parses short options',
-            ),
-            array(
-                array('--' => null, '-f' => 'bar'),
-                array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')),
-                array('foo' => 'default'),
+            ],
+            [
+                ['--' => null, '-f' => 'bar'],
+                [new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL, '', 'default')],
+                ['foo' => 'default'],
                 '->parse() does not parse opts after an end of options signal',
-            ),
-            array(
-                array('--' => null),
-                array(),
-                array(),
+            ],
+            [
+                ['--' => null],
+                [],
+                [],
                 '->parse() does not choke on end of options signal',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -139,39 +139,39 @@ class ArrayInputTest extends TestCase
 
     public function provideInvalidInput()
     {
-        return array(
-            array(
-                array('foo' => 'foo'),
-                new InputDefinition(array(new InputArgument('name'))),
+        return [
+            [
+                ['foo' => 'foo'],
+                new InputDefinition([new InputArgument('name')]),
                 'The "foo" argument does not exist.',
-            ),
-            array(
-                array('--foo' => null),
-                new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED))),
+            ],
+            [
+                ['--foo' => null],
+                new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)]),
                 'The "--foo" option requires a value.',
-            ),
-            array(
-                array('--foo' => 'foo'),
+            ],
+            [
+                ['--foo' => 'foo'],
                 new InputDefinition(),
                 'The "--foo" option does not exist.',
-            ),
-            array(
-                array('-o' => 'foo'),
+            ],
+            [
+                ['-o' => 'foo'],
                 new InputDefinition(),
                 'The "-o" option does not exist.',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testToString()
     {
-        $input = new ArrayInput(array('-f' => null, '-b' => 'bar', '--foo' => 'b a z', '--lala' => null, 'test' => 'Foo', 'test2' => "A\nB'C"));
+        $input = new ArrayInput(['-f' => null, '-b' => 'bar', '--foo' => 'b a z', '--lala' => null, 'test' => 'Foo', 'test2' => "A\nB'C"]);
         $this->assertEquals('-f -b=bar --foo='.escapeshellarg('b a z').' --lala Foo '.escapeshellarg("A\nB'C"), (string) $input);
 
-        $input = new ArrayInput(array('-b' => array('bval_1', 'bval_2'), '--f' => array('fval_1', 'fval_2')));
+        $input = new ArrayInput(['-b' => ['bval_1', 'bval_2'], '--f' => ['fval_1', 'fval_2']]);
         $this->assertSame('-b=bval_1 -b=bval_2 --f=fval_1 --f=fval_2', (string) $input);
 
-        $input = new ArrayInput(array('array_arg' => array('val_1', 'val_2')));
+        $input = new ArrayInput(['array_arg' => ['val_1', 'val_2']]);
         $this->assertSame('val_1 val_2', (string) $input);
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php b/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
index 881300c257..8b809d6f13 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputArgumentTest.php
@@ -77,8 +77,8 @@ class InputArgumentTest extends TestCase
         $this->assertEquals('another', $argument->getDefault(), '->setDefault() changes the default value');
 
         $argument = new InputArgument('foo', InputArgument::OPTIONAL | InputArgument::IS_ARRAY);
-        $argument->setDefault(array(1, 2));
-        $this->assertEquals(array(1, 2), $argument->getDefault(), '->setDefault() changes the default value');
+        $argument->setDefault([1, 2]);
+        $this->assertEquals([1, 2], $argument->getDefault(), '->setDefault() changes the default value');
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php b/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
index 0fd4342166..aca004d53e 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputDefinitionTest.php
@@ -35,10 +35,10 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $this->assertEquals(array(), $definition->getArguments(), '__construct() creates a new InputDefinition object');
+        $this->assertEquals([], $definition->getArguments(), '__construct() creates a new InputDefinition object');
 
-        $definition = new InputDefinition(array($this->foo, $this->bar));
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getArguments(), '__construct() takes an array of InputArgument objects as its first argument');
+        $definition = new InputDefinition([$this->foo, $this->bar]);
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getArguments(), '__construct() takes an array of InputArgument objects as its first argument');
     }
 
     public function testConstructorOptions()
@@ -46,10 +46,10 @@ class InputDefinitionTest extends TestCase
         $this->initializeOptions();
 
         $definition = new InputDefinition();
-        $this->assertEquals(array(), $definition->getOptions(), '__construct() creates a new InputDefinition object');
+        $this->assertEquals([], $definition->getOptions(), '__construct() creates a new InputDefinition object');
 
-        $definition = new InputDefinition(array($this->foo, $this->bar));
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getOptions(), '__construct() takes an array of InputOption objects as its first argument');
+        $definition = new InputDefinition([$this->foo, $this->bar]);
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getOptions(), '__construct() takes an array of InputOption objects as its first argument');
     }
 
     public function testSetArguments()
@@ -57,11 +57,11 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $definition->setArguments(array($this->foo));
-        $this->assertEquals(array('foo' => $this->foo), $definition->getArguments(), '->setArguments() sets the array of InputArgument objects');
-        $definition->setArguments(array($this->bar));
+        $definition->setArguments([$this->foo]);
+        $this->assertEquals(['foo' => $this->foo], $definition->getArguments(), '->setArguments() sets the array of InputArgument objects');
+        $definition->setArguments([$this->bar]);
 
-        $this->assertEquals(array('bar' => $this->bar), $definition->getArguments(), '->setArguments() clears all InputArgument objects');
+        $this->assertEquals(['bar' => $this->bar], $definition->getArguments(), '->setArguments() clears all InputArgument objects');
     }
 
     public function testAddArguments()
@@ -69,10 +69,10 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $definition->addArguments(array($this->foo));
-        $this->assertEquals(array('foo' => $this->foo), $definition->getArguments(), '->addArguments() adds an array of InputArgument objects');
-        $definition->addArguments(array($this->bar));
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getArguments(), '->addArguments() does not clear existing InputArgument objects');
+        $definition->addArguments([$this->foo]);
+        $this->assertEquals(['foo' => $this->foo], $definition->getArguments(), '->addArguments() adds an array of InputArgument objects');
+        $definition->addArguments([$this->bar]);
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getArguments(), '->addArguments() does not clear existing InputArgument objects');
     }
 
     public function testAddArgument()
@@ -81,9 +81,9 @@ class InputDefinitionTest extends TestCase
 
         $definition = new InputDefinition();
         $definition->addArgument($this->foo);
-        $this->assertEquals(array('foo' => $this->foo), $definition->getArguments(), '->addArgument() adds a InputArgument object');
+        $this->assertEquals(['foo' => $this->foo], $definition->getArguments(), '->addArgument() adds a InputArgument object');
         $definition->addArgument($this->bar);
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getArguments(), '->addArgument() adds a InputArgument object');
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getArguments(), '->addArgument() adds a InputArgument object');
     }
 
     /**
@@ -130,7 +130,7 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $definition->addArguments(array($this->foo));
+        $definition->addArguments([$this->foo]);
         $this->assertEquals($this->foo, $definition->getArgument('foo'), '->getArgument() returns a InputArgument by its name');
     }
 
@@ -143,7 +143,7 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $definition->addArguments(array($this->foo));
+        $definition->addArguments([$this->foo]);
         $definition->getArgument('bar');
     }
 
@@ -152,7 +152,7 @@ class InputDefinitionTest extends TestCase
         $this->initializeArguments();
 
         $definition = new InputDefinition();
-        $definition->addArguments(array($this->foo));
+        $definition->addArguments([$this->foo]);
 
         $this->assertTrue($definition->hasArgument('foo'), '->hasArgument() returns true if a InputArgument exists for the given name');
         $this->assertFalse($definition->hasArgument('bar'), '->hasArgument() returns false if a InputArgument exists for the given name');
@@ -182,28 +182,28 @@ class InputDefinitionTest extends TestCase
 
     public function testGetArgumentDefaults()
     {
-        $definition = new InputDefinition(array(
+        $definition = new InputDefinition([
             new InputArgument('foo1', InputArgument::OPTIONAL),
             new InputArgument('foo2', InputArgument::OPTIONAL, '', 'default'),
             new InputArgument('foo3', InputArgument::OPTIONAL | InputArgument::IS_ARRAY),
-        //  new InputArgument('foo4', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, '', array(1, 2)),
-        ));
-        $this->assertEquals(array('foo1' => null, 'foo2' => 'default', 'foo3' => array()), $definition->getArgumentDefaults(), '->getArgumentDefaults() return the default values for each argument');
+        //  new InputArgument('foo4', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, '', [1, 2]),
+        ]);
+        $this->assertEquals(['foo1' => null, 'foo2' => 'default', 'foo3' => []], $definition->getArgumentDefaults(), '->getArgumentDefaults() return the default values for each argument');
 
-        $definition = new InputDefinition(array(
-            new InputArgument('foo4', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, '', array(1, 2)),
-        ));
-        $this->assertEquals(array('foo4' => array(1, 2)), $definition->getArgumentDefaults(), '->getArgumentDefaults() return the default values for each argument');
+        $definition = new InputDefinition([
+            new InputArgument('foo4', InputArgument::OPTIONAL | InputArgument::IS_ARRAY, '', [1, 2]),
+        ]);
+        $this->assertEquals(['foo4' => [1, 2]], $definition->getArgumentDefaults(), '->getArgumentDefaults() return the default values for each argument');
     }
 
     public function testSetOptions()
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
-        $this->assertEquals(array('foo' => $this->foo), $definition->getOptions(), '->setOptions() sets the array of InputOption objects');
-        $definition->setOptions(array($this->bar));
-        $this->assertEquals(array('bar' => $this->bar), $definition->getOptions(), '->setOptions() clears all InputOption objects');
+        $definition = new InputDefinition([$this->foo]);
+        $this->assertEquals(['foo' => $this->foo], $definition->getOptions(), '->setOptions() sets the array of InputOption objects');
+        $definition->setOptions([$this->bar]);
+        $this->assertEquals(['bar' => $this->bar], $definition->getOptions(), '->setOptions() clears all InputOption objects');
     }
 
     /**
@@ -214,8 +214,8 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
-        $definition->setOptions(array($this->bar));
+        $definition = new InputDefinition([$this->foo]);
+        $definition->setOptions([$this->bar]);
         $definition->getOptionForShortcut('f');
     }
 
@@ -223,10 +223,10 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
-        $this->assertEquals(array('foo' => $this->foo), $definition->getOptions(), '->addOptions() adds an array of InputOption objects');
-        $definition->addOptions(array($this->bar));
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getOptions(), '->addOptions() does not clear existing InputOption objects');
+        $definition = new InputDefinition([$this->foo]);
+        $this->assertEquals(['foo' => $this->foo], $definition->getOptions(), '->addOptions() adds an array of InputOption objects');
+        $definition->addOptions([$this->bar]);
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getOptions(), '->addOptions() does not clear existing InputOption objects');
     }
 
     public function testAddOption()
@@ -235,9 +235,9 @@ class InputDefinitionTest extends TestCase
 
         $definition = new InputDefinition();
         $definition->addOption($this->foo);
-        $this->assertEquals(array('foo' => $this->foo), $definition->getOptions(), '->addOption() adds a InputOption object');
+        $this->assertEquals(['foo' => $this->foo], $definition->getOptions(), '->addOption() adds a InputOption object');
         $definition->addOption($this->bar);
-        $this->assertEquals(array('foo' => $this->foo, 'bar' => $this->bar), $definition->getOptions(), '->addOption() adds a InputOption object');
+        $this->assertEquals(['foo' => $this->foo, 'bar' => $this->bar], $definition->getOptions(), '->addOption() adds a InputOption object');
     }
 
     /**
@@ -270,7 +270,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $this->assertEquals($this->foo, $definition->getOption('foo'), '->getOption() returns a InputOption by its name');
     }
 
@@ -282,7 +282,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $definition->getOption('bar');
     }
 
@@ -290,7 +290,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $this->assertTrue($definition->hasOption('foo'), '->hasOption() returns true if a InputOption exists for the given name');
         $this->assertFalse($definition->hasOption('bar'), '->hasOption() returns false if a InputOption exists for the given name');
     }
@@ -299,7 +299,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $this->assertTrue($definition->hasShortcut('f'), '->hasShortcut() returns true if a InputOption exists for the given shortcut');
         $this->assertFalse($definition->hasShortcut('b'), '->hasShortcut() returns false if a InputOption exists for the given shortcut');
     }
@@ -308,7 +308,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $this->assertEquals($this->foo, $definition->getOptionForShortcut('f'), '->getOptionForShortcut() returns a InputOption by its shortcut');
     }
 
@@ -316,7 +316,7 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->multi));
+        $definition = new InputDefinition([$this->multi]);
         $this->assertEquals($this->multi, $definition->getOptionForShortcut('m'), '->getOptionForShortcut() returns a InputOption by its shortcut');
         $this->assertEquals($this->multi, $definition->getOptionForShortcut('mmm'), '->getOptionForShortcut() returns a InputOption by its shortcut');
     }
@@ -329,30 +329,30 @@ class InputDefinitionTest extends TestCase
     {
         $this->initializeOptions();
 
-        $definition = new InputDefinition(array($this->foo));
+        $definition = new InputDefinition([$this->foo]);
         $definition->getOptionForShortcut('l');
     }
 
     public function testGetOptionDefaults()
     {
-        $definition = new InputDefinition(array(
+        $definition = new InputDefinition([
             new InputOption('foo1', null, InputOption::VALUE_NONE),
             new InputOption('foo2', null, InputOption::VALUE_REQUIRED),
             new InputOption('foo3', null, InputOption::VALUE_REQUIRED, '', 'default'),
             new InputOption('foo4', null, InputOption::VALUE_OPTIONAL),
             new InputOption('foo5', null, InputOption::VALUE_OPTIONAL, '', 'default'),
             new InputOption('foo6', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY),
-            new InputOption('foo7', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, '', array(1, 2)),
-        ));
-        $defaults = array(
+            new InputOption('foo7', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY, '', [1, 2]),
+        ]);
+        $defaults = [
             'foo1' => false,
             'foo2' => null,
             'foo3' => 'default',
             'foo4' => null,
             'foo5' => 'default',
-            'foo6' => array(),
-            'foo7' => array(1, 2),
-        );
+            'foo6' => [],
+            'foo7' => [1, 2],
+        ];
         $this->assertSame($defaults, $definition->getOptionDefaults(), '->getOptionDefaults() returns the default values for all options');
     }
 
@@ -366,25 +366,25 @@ class InputDefinitionTest extends TestCase
 
     public function getGetSynopsisData()
     {
-        return array(
-            array(new InputDefinition(array(new InputOption('foo'))), '[--foo]', 'puts optional options in square brackets'),
-            array(new InputDefinition(array(new InputOption('foo', 'f'))), '[-f|--foo]', 'separates shortcut with a pipe'),
-            array(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_REQUIRED))), '[-f|--foo FOO]', 'uses shortcut as value placeholder'),
-            array(new InputDefinition(array(new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL))), '[-f|--foo [FOO]]', 'puts optional values in square brackets'),
+        return [
+            [new InputDefinition([new InputOption('foo')]), '[--foo]', 'puts optional options in square brackets'],
+            [new InputDefinition([new InputOption('foo', 'f')]), '[-f|--foo]', 'separates shortcut with a pipe'],
+            [new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_REQUIRED)]), '[-f|--foo FOO]', 'uses shortcut as value placeholder'],
+            [new InputDefinition([new InputOption('foo', 'f', InputOption::VALUE_OPTIONAL)]), '[-f|--foo [FOO]]', 'puts optional values in square brackets'],
 
-            array(new InputDefinition(array(new InputArgument('foo', InputArgument::REQUIRED))), '<foo>', 'puts arguments in angle brackets'),
-            array(new InputDefinition(array(new InputArgument('foo'))), '[<foo>]', 'puts optional arguments in square brackets'),
-            array(new InputDefinition(array(new InputArgument('foo'), new InputArgument('bar'))), '[<foo> [<bar>]]', 'chains optional arguments inside brackets'),
-            array(new InputDefinition(array(new InputArgument('foo', InputArgument::IS_ARRAY))), '[<foo>...]', 'uses an ellipsis for array arguments'),
-            array(new InputDefinition(array(new InputArgument('foo', InputArgument::REQUIRED | InputArgument::IS_ARRAY))), '<foo>...', 'uses an ellipsis for required array arguments'),
+            [new InputDefinition([new InputArgument('foo', InputArgument::REQUIRED)]), '<foo>', 'puts arguments in angle brackets'],
+            [new InputDefinition([new InputArgument('foo')]), '[<foo>]', 'puts optional arguments in square brackets'],
+            [new InputDefinition([new InputArgument('foo'), new InputArgument('bar')]), '[<foo> [<bar>]]', 'chains optional arguments inside brackets'],
+            [new InputDefinition([new InputArgument('foo', InputArgument::IS_ARRAY)]), '[<foo>...]', 'uses an ellipsis for array arguments'],
+            [new InputDefinition([new InputArgument('foo', InputArgument::REQUIRED | InputArgument::IS_ARRAY)]), '<foo>...', 'uses an ellipsis for required array arguments'],
 
-            array(new InputDefinition(array(new InputOption('foo'), new InputArgument('foo', InputArgument::REQUIRED))), '[--foo] [--] <foo>', 'puts [--] between options and arguments'),
-        );
+            [new InputDefinition([new InputOption('foo'), new InputArgument('foo', InputArgument::REQUIRED)]), '[--foo] [--] <foo>', 'puts [--] between options and arguments'],
+        ];
     }
 
     public function testGetShortSynopsis()
     {
-        $definition = new InputDefinition(array(new InputOption('foo'), new InputOption('bar'), new InputArgument('cat')));
+        $definition = new InputDefinition([new InputOption('foo'), new InputOption('bar'), new InputArgument('cat')]);
         $this->assertEquals('[options] [--] [<cat>]', $definition->getSynopsis(true), '->getSynopsis(true) groups options in [options]');
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php b/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
index 66a6dd5ac3..ad1c043ed5 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputOptionTest.php
@@ -39,7 +39,7 @@ class InputOptionTest extends TestCase
         $this->assertEquals('f', $option->getShortcut(), '__construct() can take a shortcut as its second argument');
         $option = new InputOption('foo', '-f|-ff|fff');
         $this->assertEquals('f|ff|fff', $option->getShortcut(), '__construct() removes the leading - of the shortcuts');
-        $option = new InputOption('foo', array('f', 'ff', '-fff'));
+        $option = new InputOption('foo', ['f', 'ff', '-fff']);
         $this->assertEquals('f|ff|fff', $option->getShortcut(), '__construct() removes the leading - of the shortcuts');
         $option = new InputOption('foo');
         $this->assertNull($option->getShortcut(), '__construct() makes the shortcut null by default');
@@ -132,7 +132,7 @@ class InputOptionTest extends TestCase
         $this->assertNull($option->getDefault(), '->getDefault() returns null if no default value is configured');
 
         $option = new InputOption('foo', null, InputOption::VALUE_OPTIONAL | InputOption::VALUE_IS_ARRAY);
-        $this->assertEquals(array(), $option->getDefault(), '->getDefault() returns an empty array if option is an array');
+        $this->assertEquals([], $option->getDefault(), '->getDefault() returns an empty array if option is an array');
 
         $option = new InputOption('foo', null, InputOption::VALUE_NONE);
         $this->assertFalse($option->getDefault(), '->getDefault() returns false if the option does not take a value');
@@ -147,8 +147,8 @@ class InputOptionTest extends TestCase
         $this->assertEquals('another', $option->getDefault(), '->setDefault() changes the default value');
 
         $option = new InputOption('foo', null, InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY);
-        $option->setDefault(array(1, 2));
-        $this->assertEquals(array(1, 2), $option->getDefault(), '->setDefault() changes the default value');
+        $option->setDefault([1, 2]);
+        $this->assertEquals([1, 2], $option->getDefault(), '->setDefault() changes the default value');
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/Input/InputTest.php b/src/Symfony/Component/Console/Tests/Input/InputTest.php
index 7cf1d244a3..61608bf27c 100644
--- a/src/Symfony/Component/Console/Tests/Input/InputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/InputTest.php
@@ -21,30 +21,30 @@ class InputTest extends TestCase
 {
     public function testConstructor()
     {
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name')]));
         $this->assertEquals('foo', $input->getArgument('name'), '->__construct() takes a InputDefinition as an argument');
     }
 
     public function testOptions()
     {
-        $input = new ArrayInput(array('--name' => 'foo'), new InputDefinition(array(new InputOption('name'))));
+        $input = new ArrayInput(['--name' => 'foo'], new InputDefinition([new InputOption('name')]));
         $this->assertEquals('foo', $input->getOption('name'), '->getOption() returns the value for the given option');
 
         $input->setOption('name', 'bar');
         $this->assertEquals('bar', $input->getOption('name'), '->setOption() sets the value for a given option');
-        $this->assertEquals(array('name' => 'bar'), $input->getOptions(), '->getOptions() returns all option values');
+        $this->assertEquals(['name' => 'bar'], $input->getOptions(), '->getOptions() returns all option values');
 
-        $input = new ArrayInput(array('--name' => 'foo'), new InputDefinition(array(new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['--name' => 'foo'], new InputDefinition([new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default')]));
         $this->assertEquals('default', $input->getOption('bar'), '->getOption() returns the default value for optional options');
-        $this->assertEquals(array('name' => 'foo', 'bar' => 'default'), $input->getOptions(), '->getOptions() returns all option values, even optional ones');
+        $this->assertEquals(['name' => 'foo', 'bar' => 'default'], $input->getOptions(), '->getOptions() returns all option values, even optional ones');
 
-        $input = new ArrayInput(array('--name' => 'foo', '--bar' => ''), new InputDefinition(array(new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['--name' => 'foo', '--bar' => ''], new InputDefinition([new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default')]));
         $this->assertEquals('', $input->getOption('bar'), '->getOption() returns null for options explicitly passed without value (or an empty value)');
-        $this->assertEquals(array('name' => 'foo', 'bar' => ''), $input->getOptions(), '->getOptions() returns all option values.');
+        $this->assertEquals(['name' => 'foo', 'bar' => ''], $input->getOptions(), '->getOptions() returns all option values.');
 
-        $input = new ArrayInput(array('--name' => 'foo', '--bar' => null), new InputDefinition(array(new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['--name' => 'foo', '--bar' => null], new InputDefinition([new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default')]));
         $this->assertNull($input->getOption('bar'), '->getOption() returns null for options explicitly passed without value (or an empty value)');
-        $this->assertEquals(array('name' => 'foo', 'bar' => null), $input->getOptions(), '->getOptions() returns all option values');
+        $this->assertEquals(['name' => 'foo', 'bar' => null], $input->getOptions(), '->getOptions() returns all option values');
     }
 
     /**
@@ -53,7 +53,7 @@ class InputTest extends TestCase
      */
     public function testSetInvalidOption()
     {
-        $input = new ArrayInput(array('--name' => 'foo'), new InputDefinition(array(new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['--name' => 'foo'], new InputDefinition([new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default')]));
         $input->setOption('foo', 'bar');
     }
 
@@ -63,22 +63,22 @@ class InputTest extends TestCase
      */
     public function testGetInvalidOption()
     {
-        $input = new ArrayInput(array('--name' => 'foo'), new InputDefinition(array(new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['--name' => 'foo'], new InputDefinition([new InputOption('name'), new InputOption('bar', '', InputOption::VALUE_OPTIONAL, '', 'default')]));
         $input->getOption('foo');
     }
 
     public function testArguments()
     {
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name')]));
         $this->assertEquals('foo', $input->getArgument('name'), '->getArgument() returns the value for the given argument');
 
         $input->setArgument('name', 'bar');
         $this->assertEquals('bar', $input->getArgument('name'), '->setArgument() sets the value for a given argument');
-        $this->assertEquals(array('name' => 'bar'), $input->getArguments(), '->getArguments() returns all argument values');
+        $this->assertEquals(['name' => 'bar'], $input->getArguments(), '->getArguments() returns all argument values');
 
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default')]));
         $this->assertEquals('default', $input->getArgument('bar'), '->getArgument() returns the default value for optional arguments');
-        $this->assertEquals(array('name' => 'foo', 'bar' => 'default'), $input->getArguments(), '->getArguments() returns all argument values, even optional ones');
+        $this->assertEquals(['name' => 'foo', 'bar' => 'default'], $input->getArguments(), '->getArguments() returns all argument values, even optional ones');
     }
 
     /**
@@ -87,7 +87,7 @@ class InputTest extends TestCase
      */
     public function testSetInvalidArgument()
     {
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default')]));
         $input->setArgument('foo', 'bar');
     }
 
@@ -97,7 +97,7 @@ class InputTest extends TestCase
      */
     public function testGetInvalidArgument()
     {
-        $input = new ArrayInput(array('name' => 'foo'), new InputDefinition(array(new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default'))));
+        $input = new ArrayInput(['name' => 'foo'], new InputDefinition([new InputArgument('name'), new InputArgument('bar', InputArgument::OPTIONAL, '', 'default')]));
         $input->getArgument('foo');
     }
 
@@ -107,8 +107,8 @@ class InputTest extends TestCase
      */
     public function testValidateWithMissingArguments()
     {
-        $input = new ArrayInput(array());
-        $input->bind(new InputDefinition(array(new InputArgument('name', InputArgument::REQUIRED))));
+        $input = new ArrayInput([]);
+        $input->bind(new InputDefinition([new InputArgument('name', InputArgument::REQUIRED)]));
         $input->validate();
     }
 
@@ -118,22 +118,22 @@ class InputTest extends TestCase
      */
     public function testValidateWithMissingRequiredArguments()
     {
-        $input = new ArrayInput(array('bar' => 'baz'));
-        $input->bind(new InputDefinition(array(new InputArgument('name', InputArgument::REQUIRED), new InputArgument('bar', InputArgument::OPTIONAL))));
+        $input = new ArrayInput(['bar' => 'baz']);
+        $input->bind(new InputDefinition([new InputArgument('name', InputArgument::REQUIRED), new InputArgument('bar', InputArgument::OPTIONAL)]));
         $input->validate();
     }
 
     public function testValidate()
     {
-        $input = new ArrayInput(array('name' => 'foo'));
-        $input->bind(new InputDefinition(array(new InputArgument('name', InputArgument::REQUIRED))));
+        $input = new ArrayInput(['name' => 'foo']);
+        $input->bind(new InputDefinition([new InputArgument('name', InputArgument::REQUIRED)]));
 
         $this->assertNull($input->validate());
     }
 
     public function testSetGetInteractive()
     {
-        $input = new ArrayInput(array());
+        $input = new ArrayInput([]);
         $this->assertTrue($input->isInteractive(), '->isInteractive() returns whether the input should be interactive or not');
         $input->setInteractive(false);
         $this->assertFalse($input->isInteractive(), '->setInteractive() changes the interactive flag');
@@ -141,7 +141,7 @@ class InputTest extends TestCase
 
     public function testSetGetStream()
     {
-        $input = new ArrayInput(array());
+        $input = new ArrayInput([]);
         $stream = fopen('php://memory', 'r+', false);
         $input->setStream($stream);
         $this->assertSame($stream, $input->getStream());
diff --git a/src/Symfony/Component/Console/Tests/Input/StringInputTest.php b/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
index f2e3467ef8..7f21894526 100644
--- a/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
+++ b/src/Symfony/Component/Console/Tests/Input/StringInputTest.php
@@ -33,7 +33,7 @@ class StringInputTest extends TestCase
     public function testInputOptionWithGivenString()
     {
         $definition = new InputDefinition(
-            array(new InputOption('foo', null, InputOption::VALUE_REQUIRED))
+            [new InputOption('foo', null, InputOption::VALUE_REQUIRED)]
         );
 
         // call to bind
@@ -44,33 +44,33 @@ class StringInputTest extends TestCase
 
     public function getTokenizeData()
     {
-        return array(
-            array('', array(), '->tokenize() parses an empty string'),
-            array('foo', array('foo'), '->tokenize() parses arguments'),
-            array('  foo  bar  ', array('foo', 'bar'), '->tokenize() ignores whitespaces between arguments'),
-            array('"quoted"', array('quoted'), '->tokenize() parses quoted arguments'),
-            array("'quoted'", array('quoted'), '->tokenize() parses quoted arguments'),
-            array("'a\rb\nc\td'", array("a\rb\nc\td"), '->tokenize() parses whitespace chars in strings'),
-            array("'a'\r'b'\n'c'\t'd'", array('a', 'b', 'c', 'd'), '->tokenize() parses whitespace chars between args as spaces'),
-            array('\"quoted\"', array('"quoted"'), '->tokenize() parses escaped-quoted arguments'),
-            array("\'quoted\'", array('\'quoted\''), '->tokenize() parses escaped-quoted arguments'),
-            array('-a', array('-a'), '->tokenize() parses short options'),
-            array('-azc', array('-azc'), '->tokenize() parses aggregated short options'),
-            array('-awithavalue', array('-awithavalue'), '->tokenize() parses short options with a value'),
-            array('-a"foo bar"', array('-afoo bar'), '->tokenize() parses short options with a value'),
-            array('-a"foo bar""foo bar"', array('-afoo barfoo bar'), '->tokenize() parses short options with a value'),
-            array('-a\'foo bar\'', array('-afoo bar'), '->tokenize() parses short options with a value'),
-            array('-a\'foo bar\'\'foo bar\'', array('-afoo barfoo bar'), '->tokenize() parses short options with a value'),
-            array('-a\'foo bar\'"foo bar"', array('-afoo barfoo bar'), '->tokenize() parses short options with a value'),
-            array('--long-option', array('--long-option'), '->tokenize() parses long options'),
-            array('--long-option=foo', array('--long-option=foo'), '->tokenize() parses long options with a value'),
-            array('--long-option="foo bar"', array('--long-option=foo bar'), '->tokenize() parses long options with a value'),
-            array('--long-option="foo bar""another"', array('--long-option=foo baranother'), '->tokenize() parses long options with a value'),
-            array('--long-option=\'foo bar\'', array('--long-option=foo bar'), '->tokenize() parses long options with a value'),
-            array("--long-option='foo bar''another'", array('--long-option=foo baranother'), '->tokenize() parses long options with a value'),
-            array("--long-option='foo bar'\"another\"", array('--long-option=foo baranother'), '->tokenize() parses long options with a value'),
-            array('foo -a -ffoo --long bar', array('foo', '-a', '-ffoo', '--long', 'bar'), '->tokenize() parses when several arguments and options'),
-        );
+        return [
+            ['', [], '->tokenize() parses an empty string'],
+            ['foo', ['foo'], '->tokenize() parses arguments'],
+            ['  foo  bar  ', ['foo', 'bar'], '->tokenize() ignores whitespaces between arguments'],
+            ['"quoted"', ['quoted'], '->tokenize() parses quoted arguments'],
+            ["'quoted'", ['quoted'], '->tokenize() parses quoted arguments'],
+            ["'a\rb\nc\td'", ["a\rb\nc\td"], '->tokenize() parses whitespace chars in strings'],
+            ["'a'\r'b'\n'c'\t'd'", ['a', 'b', 'c', 'd'], '->tokenize() parses whitespace chars between args as spaces'],
+            ['\"quoted\"', ['"quoted"'], '->tokenize() parses escaped-quoted arguments'],
+            ["\'quoted\'", ['\'quoted\''], '->tokenize() parses escaped-quoted arguments'],
+            ['-a', ['-a'], '->tokenize() parses short options'],
+            ['-azc', ['-azc'], '->tokenize() parses aggregated short options'],
+            ['-awithavalue', ['-awithavalue'], '->tokenize() parses short options with a value'],
+            ['-a"foo bar"', ['-afoo bar'], '->tokenize() parses short options with a value'],
+            ['-a"foo bar""foo bar"', ['-afoo barfoo bar'], '->tokenize() parses short options with a value'],
+            ['-a\'foo bar\'', ['-afoo bar'], '->tokenize() parses short options with a value'],
+            ['-a\'foo bar\'\'foo bar\'', ['-afoo barfoo bar'], '->tokenize() parses short options with a value'],
+            ['-a\'foo bar\'"foo bar"', ['-afoo barfoo bar'], '->tokenize() parses short options with a value'],
+            ['--long-option', ['--long-option'], '->tokenize() parses long options'],
+            ['--long-option=foo', ['--long-option=foo'], '->tokenize() parses long options with a value'],
+            ['--long-option="foo bar"', ['--long-option=foo bar'], '->tokenize() parses long options with a value'],
+            ['--long-option="foo bar""another"', ['--long-option=foo baranother'], '->tokenize() parses long options with a value'],
+            ['--long-option=\'foo bar\'', ['--long-option=foo bar'], '->tokenize() parses long options with a value'],
+            ["--long-option='foo bar''another'", ['--long-option=foo baranother'], '->tokenize() parses long options with a value'],
+            ["--long-option='foo bar'\"another\"", ['--long-option=foo baranother'], '->tokenize() parses long options with a value'],
+            ['foo -a -ffoo --long bar', ['foo', '-a', '-ffoo', '--long', 'bar'], '->tokenize() parses when several arguments and options'],
+        ];
     }
 
     public function testToString()
diff --git a/src/Symfony/Component/Console/Tests/Logger/ConsoleLoggerTest.php b/src/Symfony/Component/Console/Tests/Logger/ConsoleLoggerTest.php
index 95e78fc29f..efeec4234e 100644
--- a/src/Symfony/Component/Console/Tests/Logger/ConsoleLoggerTest.php
+++ b/src/Symfony/Component/Console/Tests/Logger/ConsoleLoggerTest.php
@@ -39,7 +39,7 @@ class ConsoleLoggerTest extends TestCase
     {
         $this->output = new DummyOutput(OutputInterface::VERBOSITY_VERBOSE);
 
-        return new ConsoleLogger($this->output, array(
+        return new ConsoleLogger($this->output, [
             LogLevel::EMERGENCY => OutputInterface::VERBOSITY_NORMAL,
             LogLevel::ALERT => OutputInterface::VERBOSITY_NORMAL,
             LogLevel::CRITICAL => OutputInterface::VERBOSITY_NORMAL,
@@ -48,7 +48,7 @@ class ConsoleLoggerTest extends TestCase
             LogLevel::NOTICE => OutputInterface::VERBOSITY_NORMAL,
             LogLevel::INFO => OutputInterface::VERBOSITY_NORMAL,
             LogLevel::DEBUG => OutputInterface::VERBOSITY_NORMAL,
-        ));
+        ]);
     }
 
     /**
@@ -64,7 +64,7 @@ class ConsoleLoggerTest extends TestCase
     /**
      * @dataProvider provideOutputMappingParams
      */
-    public function testOutputMapping($logLevel, $outputVerbosity, $isOutput, $addVerbosityLevelMap = array())
+    public function testOutputMapping($logLevel, $outputVerbosity, $isOutput, $addVerbosityLevelMap = [])
     {
         $out = new BufferedOutput($outputVerbosity);
         $logger = new ConsoleLogger($out, $addVerbosityLevelMap);
@@ -75,22 +75,22 @@ class ConsoleLoggerTest extends TestCase
 
     public function provideOutputMappingParams()
     {
-        $quietMap = array(LogLevel::EMERGENCY => OutputInterface::VERBOSITY_QUIET);
+        $quietMap = [LogLevel::EMERGENCY => OutputInterface::VERBOSITY_QUIET];
 
-        return array(
-            array(LogLevel::EMERGENCY, OutputInterface::VERBOSITY_NORMAL, true),
-            array(LogLevel::WARNING, OutputInterface::VERBOSITY_NORMAL, true),
-            array(LogLevel::INFO, OutputInterface::VERBOSITY_NORMAL, false),
-            array(LogLevel::DEBUG, OutputInterface::VERBOSITY_NORMAL, false),
-            array(LogLevel::INFO, OutputInterface::VERBOSITY_VERBOSE, false),
-            array(LogLevel::INFO, OutputInterface::VERBOSITY_VERY_VERBOSE, true),
-            array(LogLevel::DEBUG, OutputInterface::VERBOSITY_VERY_VERBOSE, false),
-            array(LogLevel::DEBUG, OutputInterface::VERBOSITY_DEBUG, true),
-            array(LogLevel::ALERT, OutputInterface::VERBOSITY_QUIET, false),
-            array(LogLevel::EMERGENCY, OutputInterface::VERBOSITY_QUIET, false),
-            array(LogLevel::ALERT, OutputInterface::VERBOSITY_QUIET, false, $quietMap),
-            array(LogLevel::EMERGENCY, OutputInterface::VERBOSITY_QUIET, true, $quietMap),
-        );
+        return [
+            [LogLevel::EMERGENCY, OutputInterface::VERBOSITY_NORMAL, true],
+            [LogLevel::WARNING, OutputInterface::VERBOSITY_NORMAL, true],
+            [LogLevel::INFO, OutputInterface::VERBOSITY_NORMAL, false],
+            [LogLevel::DEBUG, OutputInterface::VERBOSITY_NORMAL, false],
+            [LogLevel::INFO, OutputInterface::VERBOSITY_VERBOSE, false],
+            [LogLevel::INFO, OutputInterface::VERBOSITY_VERY_VERBOSE, true],
+            [LogLevel::DEBUG, OutputInterface::VERBOSITY_VERY_VERBOSE, false],
+            [LogLevel::DEBUG, OutputInterface::VERBOSITY_DEBUG, true],
+            [LogLevel::ALERT, OutputInterface::VERBOSITY_QUIET, false],
+            [LogLevel::EMERGENCY, OutputInterface::VERBOSITY_QUIET, false],
+            [LogLevel::ALERT, OutputInterface::VERBOSITY_QUIET, false, $quietMap],
+            [LogLevel::EMERGENCY, OutputInterface::VERBOSITY_QUIET, true, $quietMap],
+        ];
     }
 
     public function testHasErrored()
@@ -117,28 +117,28 @@ class ConsoleLoggerTest extends TestCase
     public function testLogsAtAllLevels($level, $message)
     {
         $logger = $this->getLogger();
-        $logger->{$level}($message, array('user' => 'Bob'));
-        $logger->log($level, $message, array('user' => 'Bob'));
+        $logger->{$level}($message, ['user' => 'Bob']);
+        $logger->log($level, $message, ['user' => 'Bob']);
 
-        $expected = array(
+        $expected = [
             $level.' message of level '.$level.' with context: Bob',
             $level.' message of level '.$level.' with context: Bob',
-        );
+        ];
         $this->assertEquals($expected, $this->getLogs());
     }
 
     public function provideLevelsAndMessages()
     {
-        return array(
-            LogLevel::EMERGENCY => array(LogLevel::EMERGENCY, 'message of level emergency with context: {user}'),
-            LogLevel::ALERT => array(LogLevel::ALERT, 'message of level alert with context: {user}'),
-            LogLevel::CRITICAL => array(LogLevel::CRITICAL, 'message of level critical with context: {user}'),
-            LogLevel::ERROR => array(LogLevel::ERROR, 'message of level error with context: {user}'),
-            LogLevel::WARNING => array(LogLevel::WARNING, 'message of level warning with context: {user}'),
-            LogLevel::NOTICE => array(LogLevel::NOTICE, 'message of level notice with context: {user}'),
-            LogLevel::INFO => array(LogLevel::INFO, 'message of level info with context: {user}'),
-            LogLevel::DEBUG => array(LogLevel::DEBUG, 'message of level debug with context: {user}'),
-        );
+        return [
+            LogLevel::EMERGENCY => [LogLevel::EMERGENCY, 'message of level emergency with context: {user}'],
+            LogLevel::ALERT => [LogLevel::ALERT, 'message of level alert with context: {user}'],
+            LogLevel::CRITICAL => [LogLevel::CRITICAL, 'message of level critical with context: {user}'],
+            LogLevel::ERROR => [LogLevel::ERROR, 'message of level error with context: {user}'],
+            LogLevel::WARNING => [LogLevel::WARNING, 'message of level warning with context: {user}'],
+            LogLevel::NOTICE => [LogLevel::NOTICE, 'message of level notice with context: {user}'],
+            LogLevel::INFO => [LogLevel::INFO, 'message of level info with context: {user}'],
+            LogLevel::DEBUG => [LogLevel::DEBUG, 'message of level debug with context: {user}'],
+        ];
     }
 
     /**
@@ -153,56 +153,56 @@ class ConsoleLoggerTest extends TestCase
     public function testContextReplacement()
     {
         $logger = $this->getLogger();
-        $logger->info('{Message {nothing} {user} {foo.bar} a}', array('user' => 'Bob', 'foo.bar' => 'Bar'));
+        $logger->info('{Message {nothing} {user} {foo.bar} a}', ['user' => 'Bob', 'foo.bar' => 'Bar']);
 
-        $expected = array('info {Message {nothing} Bob Bar a}');
+        $expected = ['info {Message {nothing} Bob Bar a}'];
         $this->assertEquals($expected, $this->getLogs());
     }
 
     public function testObjectCastToString()
     {
         if (method_exists($this, 'createPartialMock')) {
-            $dummy = $this->createPartialMock('Symfony\Component\Console\Tests\Logger\DummyTest', array('__toString'));
+            $dummy = $this->createPartialMock('Symfony\Component\Console\Tests\Logger\DummyTest', ['__toString']);
         } else {
-            $dummy = $this->getMock('Symfony\Component\Console\Tests\Logger\DummyTest', array('__toString'));
+            $dummy = $this->getMock('Symfony\Component\Console\Tests\Logger\DummyTest', ['__toString']);
         }
         $dummy->method('__toString')->will($this->returnValue('DUMMY'));
 
         $this->getLogger()->warning($dummy);
 
-        $expected = array('warning DUMMY');
+        $expected = ['warning DUMMY'];
         $this->assertEquals($expected, $this->getLogs());
     }
 
     public function testContextCanContainAnything()
     {
-        $context = array(
+        $context = [
             'bool' => true,
             'null' => null,
             'string' => 'Foo',
             'int' => 0,
             'float' => 0.5,
-            'nested' => array('with object' => new DummyTest()),
+            'nested' => ['with object' => new DummyTest()],
             'object' => new \DateTime(),
             'resource' => fopen('php://memory', 'r'),
-        );
+        ];
 
         $this->getLogger()->warning('Crazy context data', $context);
 
-        $expected = array('warning Crazy context data');
+        $expected = ['warning Crazy context data'];
         $this->assertEquals($expected, $this->getLogs());
     }
 
     public function testContextExceptionKeyCanBeExceptionOrOtherValues()
     {
         $logger = $this->getLogger();
-        $logger->warning('Random message', array('exception' => 'oops'));
-        $logger->critical('Uncaught Exception!', array('exception' => new \LogicException('Fail')));
+        $logger->warning('Random message', ['exception' => 'oops']);
+        $logger->critical('Uncaught Exception!', ['exception' => new \LogicException('Fail')]);
 
-        $expected = array(
+        $expected = [
             'warning Random message',
             'critical Uncaught Exception!',
-        );
+        ];
         $this->assertEquals($expected, $this->getLogs());
     }
 }
diff --git a/src/Symfony/Component/Console/Tests/Output/ConsoleSectionOutputTest.php b/src/Symfony/Component/Console/Tests/Output/ConsoleSectionOutputTest.php
index e5cd0597e4..4c292c2c69 100644
--- a/src/Symfony/Component/Console/Tests/Output/ConsoleSectionOutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/ConsoleSectionOutputTest.php
@@ -36,7 +36,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     public function testClearAll()
     {
-        $sections = array();
+        $sections = [];
         $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
         $output->writeln('Foo'.PHP_EOL.'Bar');
@@ -48,7 +48,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     public function testClearNumberOfLines()
     {
-        $sections = array();
+        $sections = [];
         $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
         $output->writeln("Foo\nBar\nBaz\nFooBar");
@@ -61,7 +61,7 @@ class ConsoleSectionOutputTest extends TestCase
     public function testClearNumberOfLinesWithMultipleSections()
     {
         $output = new StreamOutput($this->stream);
-        $sections = array();
+        $sections = [];
         $output1 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
         $output2 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
@@ -78,7 +78,7 @@ class ConsoleSectionOutputTest extends TestCase
     public function testClearPreservingEmptyLines()
     {
         $output = new StreamOutput($this->stream);
-        $sections = array();
+        $sections = [];
         $output1 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
         $output2 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
@@ -93,7 +93,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     public function testOverwrite()
     {
-        $sections = array();
+        $sections = [];
         $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
         $output->writeln('Foo');
@@ -105,7 +105,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     public function testOverwriteMultipleLines()
     {
-        $sections = array();
+        $sections = [];
         $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
         $output->writeln('Foo'.PHP_EOL.'Bar'.PHP_EOL.'Baz');
@@ -117,7 +117,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     public function testAddingMultipleSections()
     {
-        $sections = array();
+        $sections = [];
         $output1 = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
         $output2 = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
@@ -127,7 +127,7 @@ class ConsoleSectionOutputTest extends TestCase
     public function testMultipleSectionsOutput()
     {
         $output = new StreamOutput($this->stream);
-        $sections = array();
+        $sections = [];
         $output1 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
         $output2 = new ConsoleSectionOutput($output->getStream(), $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
@@ -151,7 +151,7 @@ class ConsoleSectionOutputTest extends TestCase
         $input->expects($this->once())->method('isInteractive')->willReturn(true);
         $input->expects($this->once())->method('getStream')->willReturn($inputStream);
 
-        $sections = array();
+        $sections = [];
         $output = new ConsoleSectionOutput($this->stream, $sections, OutputInterface::VERBOSITY_NORMAL, true, new OutputFormatter());
 
         (new QuestionHelper())->ask($input, $output, new Question('What\'s your favorite super hero?'));
diff --git a/src/Symfony/Component/Console/Tests/Output/OutputTest.php b/src/Symfony/Component/Console/Tests/Output/OutputTest.php
index 24347f62f7..7cfa6cdc0a 100644
--- a/src/Symfony/Component/Console/Tests/Output/OutputTest.php
+++ b/src/Symfony/Component/Console/Tests/Output/OutputTest.php
@@ -77,7 +77,7 @@ class OutputTest extends TestCase
     public function testWriteAnArrayOfMessages()
     {
         $output = new TestOutput();
-        $output->writeln(array('foo', 'bar'));
+        $output->writeln(['foo', 'bar']);
         $this->assertEquals("foo\nbar\n", $output->output, '->writeln() can take an array of messages to output');
     }
 
@@ -106,10 +106,10 @@ class OutputTest extends TestCase
 
     public function provideWriteArguments()
     {
-        return array(
-            array('<info>foo</info>', Output::OUTPUT_RAW, "<info>foo</info>\n"),
-            array('<info>foo</info>', Output::OUTPUT_PLAIN, "foo\n"),
-        );
+        return [
+            ['<info>foo</info>', Output::OUTPUT_RAW, "<info>foo</info>\n"],
+            ['<info>foo</info>', Output::OUTPUT_PLAIN, "foo\n"],
+        ];
     }
 
     public function testWriteWithDecorationTurnedOff()
@@ -122,7 +122,7 @@ class OutputTest extends TestCase
 
     public function testWriteDecoratedMessage()
     {
-        $fooStyle = new OutputFormatterStyle('yellow', 'red', array('blink'));
+        $fooStyle = new OutputFormatterStyle('yellow', 'red', ['blink']);
         $output = new TestOutput();
         $output->getFormatter()->setStyle('FOO', $fooStyle);
         $output->setDecorated(true);
@@ -163,13 +163,13 @@ class OutputTest extends TestCase
 
     public function verbosityProvider()
     {
-        return array(
-            array(Output::VERBOSITY_QUIET, '2', '->write() in QUIET mode only outputs when an explicit QUIET verbosity is passed'),
-            array(Output::VERBOSITY_NORMAL, '123', '->write() in NORMAL mode outputs anything below an explicit VERBOSE verbosity'),
-            array(Output::VERBOSITY_VERBOSE, '1234', '->write() in VERBOSE mode outputs anything below an explicit VERY_VERBOSE verbosity'),
-            array(Output::VERBOSITY_VERY_VERBOSE, '12345', '->write() in VERY_VERBOSE mode outputs anything below an explicit DEBUG verbosity'),
-            array(Output::VERBOSITY_DEBUG, '123456', '->write() in DEBUG mode outputs everything'),
-        );
+        return [
+            [Output::VERBOSITY_QUIET, '2', '->write() in QUIET mode only outputs when an explicit QUIET verbosity is passed'],
+            [Output::VERBOSITY_NORMAL, '123', '->write() in NORMAL mode outputs anything below an explicit VERBOSE verbosity'],
+            [Output::VERBOSITY_VERBOSE, '1234', '->write() in VERBOSE mode outputs anything below an explicit VERY_VERBOSE verbosity'],
+            [Output::VERBOSITY_VERY_VERBOSE, '12345', '->write() in VERY_VERBOSE mode outputs anything below an explicit DEBUG verbosity'],
+            [Output::VERBOSITY_DEBUG, '123456', '->write() in DEBUG mode outputs everything'],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php b/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
index 308030bbcf..e6e061f441 100644
--- a/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
+++ b/src/Symfony/Component/Console/Tests/Style/SymfonyStyleTest.php
@@ -48,7 +48,7 @@ class SymfonyStyleTest extends TestCase
     {
         $code = require $inputCommandFilepath;
         $this->command->setCode($code);
-        $this->tester->execute(array(), array('interactive' => false, 'decorated' => false));
+        $this->tester->execute([], ['interactive' => false, 'decorated' => false]);
         $this->assertStringEqualsFile($outputFilepath, $this->tester->getDisplay(true));
     }
 
@@ -59,7 +59,7 @@ class SymfonyStyleTest extends TestCase
     {
         $code = require $inputCommandFilepath;
         $this->command->setCode($code);
-        $this->tester->execute(array(), array('interactive' => true, 'decorated' => false));
+        $this->tester->execute([], ['interactive' => true, 'decorated' => false]);
         $this->assertStringEqualsFile($outputFilepath, $this->tester->getDisplay(true));
     }
 
diff --git a/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php b/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
index 49ef8029f1..7522731535 100644
--- a/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
+++ b/src/Symfony/Component/Console/Tests/Tester/ApplicationTesterTest.php
@@ -35,7 +35,7 @@ class ApplicationTesterTest extends TestCase
         ;
 
         $this->tester = new ApplicationTester($this->application);
-        $this->tester->run(array('command' => 'foo', 'foo' => 'bar'), array('interactive' => false, 'decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE));
+        $this->tester->run(['command' => 'foo', 'foo' => 'bar'], ['interactive' => false, 'decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE]);
     }
 
     protected function tearDown()
@@ -79,8 +79,8 @@ class ApplicationTesterTest extends TestCase
         });
         $tester = new ApplicationTester($application);
 
-        $tester->setInputs(array('I1', 'I2', 'I3'));
-        $tester->run(array('command' => 'foo'));
+        $tester->setInputs(['I1', 'I2', 'I3']);
+        $tester->run(['command' => 'foo']);
 
         $this->assertSame(0, $tester->getStatusCode());
         $this->assertEquals('Q1Q2Q3', $tester->getDisplay(true));
@@ -104,8 +104,8 @@ class ApplicationTesterTest extends TestCase
 
         $tester = new ApplicationTester($application);
         $tester->run(
-            array('command' => 'foo', 'foo' => 'bar'),
-            array('capture_stderr_separately' => true)
+            ['command' => 'foo', 'foo' => 'bar'],
+            ['capture_stderr_separately' => true]
         );
 
         $this->assertSame('foo', $tester->getErrorOutput());
diff --git a/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php b/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
index f4fe32a5fb..6d9b7417d6 100644
--- a/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
+++ b/src/Symfony/Component/Console/Tests/Tester/CommandTesterTest.php
@@ -34,7 +34,7 @@ class CommandTesterTest extends TestCase
         $this->command->setCode(function ($input, $output) { $output->writeln('foo'); });
 
         $this->tester = new CommandTester($this->command);
-        $this->tester->execute(array('foo' => 'bar'), array('interactive' => false, 'decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE));
+        $this->tester->execute(['foo' => 'bar'], ['interactive' => false, 'decorated' => false, 'verbosity' => Output::VERBOSITY_VERBOSE]);
     }
 
     protected function tearDown()
@@ -84,19 +84,19 @@ class CommandTesterTest extends TestCase
         $tester = new CommandTester($application->find('foo'));
 
         // check that there is no need to pass the command name here
-        $this->assertEquals(0, $tester->execute(array()));
+        $this->assertEquals(0, $tester->execute([]));
     }
 
     public function testCommandWithInputs()
     {
-        $questions = array(
+        $questions = [
             'What\'s your name?',
             'How are you?',
             'Where do you come from?',
-        );
+        ];
 
         $command = new Command('foo');
-        $command->setHelperSet(new HelperSet(array(new QuestionHelper())));
+        $command->setHelperSet(new HelperSet([new QuestionHelper()]));
         $command->setCode(function ($input, $output) use ($questions, $command) {
             $helper = $command->getHelper('question');
             $helper->ask($input, $output, new Question($questions[0]));
@@ -105,8 +105,8 @@ class CommandTesterTest extends TestCase
         });
 
         $tester = new CommandTester($command);
-        $tester->setInputs(array('Bobby', 'Fine', 'France'));
-        $tester->execute(array());
+        $tester->setInputs(['Bobby', 'Fine', 'France']);
+        $tester->execute([]);
 
         $this->assertEquals(0, $tester->getStatusCode());
         $this->assertEquals(implode('', $questions), $tester->getDisplay(true));
@@ -114,14 +114,14 @@ class CommandTesterTest extends TestCase
 
     public function testCommandWithDefaultInputs()
     {
-        $questions = array(
+        $questions = [
             'What\'s your name?',
             'How are you?',
             'Where do you come from?',
-        );
+        ];
 
         $command = new Command('foo');
-        $command->setHelperSet(new HelperSet(array(new QuestionHelper())));
+        $command->setHelperSet(new HelperSet([new QuestionHelper()]));
         $command->setCode(function ($input, $output) use ($questions, $command) {
             $helper = $command->getHelper('question');
             $helper->ask($input, $output, new Question($questions[0], 'Bobby'));
@@ -130,8 +130,8 @@ class CommandTesterTest extends TestCase
         });
 
         $tester = new CommandTester($command);
-        $tester->setInputs(array('', '', ''));
-        $tester->execute(array());
+        $tester->setInputs(['', '', '']);
+        $tester->execute([]);
 
         $this->assertEquals(0, $tester->getStatusCode());
         $this->assertEquals(implode('', $questions), $tester->getDisplay(true));
@@ -143,14 +143,14 @@ class CommandTesterTest extends TestCase
      */
     public function testCommandWithWrongInputsNumber()
     {
-        $questions = array(
+        $questions = [
             'What\'s your name?',
             'How are you?',
             'Where do you come from?',
-        );
+        ];
 
         $command = new Command('foo');
-        $command->setHelperSet(new HelperSet(array(new QuestionHelper())));
+        $command->setHelperSet(new HelperSet([new QuestionHelper()]));
         $command->setCode(function ($input, $output) use ($questions, $command) {
             $helper = $command->getHelper('question');
             $helper->ask($input, $output, new Question($questions[0]));
@@ -159,17 +159,17 @@ class CommandTesterTest extends TestCase
         });
 
         $tester = new CommandTester($command);
-        $tester->setInputs(array('Bobby', 'Fine'));
-        $tester->execute(array());
+        $tester->setInputs(['Bobby', 'Fine']);
+        $tester->execute([]);
     }
 
     public function testSymfonyStyleCommandWithInputs()
     {
-        $questions = array(
+        $questions = [
             'What\'s your name?',
             'How are you?',
             'Where do you come from?',
-        );
+        ];
 
         $command = new Command('foo');
         $command->setCode(function ($input, $output) use ($questions, $command) {
@@ -180,8 +180,8 @@ class CommandTesterTest extends TestCase
         });
 
         $tester = new CommandTester($command);
-        $tester->setInputs(array('Bobby', 'Fine', 'France'));
-        $tester->execute(array());
+        $tester->setInputs(['Bobby', 'Fine', 'France']);
+        $tester->execute([]);
 
         $this->assertEquals(0, $tester->getStatusCode());
     }
@@ -198,8 +198,8 @@ class CommandTesterTest extends TestCase
 
         $tester = new CommandTester($command);
         $tester->execute(
-            array('foo' => 'bar'),
-            array('capture_stderr_separately' => true)
+            ['foo' => 'bar'],
+            ['capture_stderr_separately' => true]
         );
 
         $this->assertSame('foo', $tester->getErrorOutput());
diff --git a/src/Symfony/Component/CssSelector/Node/FunctionNode.php b/src/Symfony/Component/CssSelector/Node/FunctionNode.php
index 89b6437801..063f8a2789 100644
--- a/src/Symfony/Component/CssSelector/Node/FunctionNode.php
+++ b/src/Symfony/Component/CssSelector/Node/FunctionNode.php
@@ -34,7 +34,7 @@ class FunctionNode extends AbstractNode
      * @param string        $name
      * @param Token[]       $arguments
      */
-    public function __construct(NodeInterface $selector, string $name, array $arguments = array())
+    public function __construct(NodeInterface $selector, string $name, array $arguments = [])
     {
         $this->selector = $selector;
         $this->name = strtolower($name);
diff --git a/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php b/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
index eea1aa9b0c..38c8dc1548 100644
--- a/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
+++ b/src/Symfony/Component/CssSelector/Parser/Handler/StringHandler.php
@@ -47,7 +47,7 @@ class StringHandler implements HandlerInterface
     {
         $quote = $reader->getSubstring(1);
 
-        if (!\in_array($quote, array("'", '"'))) {
+        if (!\in_array($quote, ["'", '"'])) {
             return false;
         }
 
diff --git a/src/Symfony/Component/CssSelector/Parser/Parser.php b/src/Symfony/Component/CssSelector/Parser/Parser.php
index d42bdca604..e8a46c062c 100644
--- a/src/Symfony/Component/CssSelector/Parser/Parser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Parser.php
@@ -74,33 +74,33 @@ class Parser implements ParserInterface
 
         switch (true) {
             case 'odd' === $joined:
-                return array(2, 1);
+                return [2, 1];
             case 'even' === $joined:
-                return array(2, 0);
+                return [2, 0];
             case 'n' === $joined:
-                return array(1, 0);
+                return [1, 0];
             case false === strpos($joined, 'n'):
-                return array(0, $int($joined));
+                return [0, $int($joined)];
         }
 
         $split = explode('n', $joined);
         $first = isset($split[0]) ? $split[0] : null;
 
-        return array(
+        return [
             $first ? ('-' === $first || '+' === $first ? $int($first.'1') : $int($first)) : 1,
             isset($split[1]) && $split[1] ? $int($split[1]) : 0,
-        );
+        ];
     }
 
     private function parseSelectorList(TokenStream $stream): array
     {
         $stream->skipWhitespace();
-        $selectors = array();
+        $selectors = [];
 
         while (true) {
             $selectors[] = $this->parserSelectorNode($stream);
 
-            if ($stream->getPeek()->isDelimiter(array(','))) {
+            if ($stream->getPeek()->isDelimiter([','])) {
                 $stream->getNext();
                 $stream->skipWhitespace();
             } else {
@@ -119,7 +119,7 @@ class Parser implements ParserInterface
             $stream->skipWhitespace();
             $peek = $stream->getPeek();
 
-            if ($peek->isFileEnd() || $peek->isDelimiter(array(','))) {
+            if ($peek->isFileEnd() || $peek->isDelimiter([','])) {
                 break;
             }
 
@@ -127,7 +127,7 @@ class Parser implements ParserInterface
                 throw SyntaxErrorException::pseudoElementFound($pseudoElement, 'not at the end of a selector');
             }
 
-            if ($peek->isDelimiter(array('+', '>', '~'))) {
+            if ($peek->isDelimiter(['+', '>', '~'])) {
                 $combinator = $stream->getNext()->getValue();
                 $stream->skipWhitespace();
             } else {
@@ -158,8 +158,8 @@ class Parser implements ParserInterface
             $peek = $stream->getPeek();
             if ($peek->isWhitespace()
                 || $peek->isFileEnd()
-                || $peek->isDelimiter(array(',', '+', '>', '~'))
-                || ($insideNegation && $peek->isDelimiter(array(')')))
+                || $peek->isDelimiter([',', '+', '>', '~'])
+                || ($insideNegation && $peek->isDelimiter([')']))
             ) {
                 break;
             }
@@ -170,16 +170,16 @@ class Parser implements ParserInterface
 
             if ($peek->isHash()) {
                 $result = new Node\HashNode($result, $stream->getNext()->getValue());
-            } elseif ($peek->isDelimiter(array('.'))) {
+            } elseif ($peek->isDelimiter(['.'])) {
                 $stream->getNext();
                 $result = new Node\ClassNode($result, $stream->getNextIdentifier());
-            } elseif ($peek->isDelimiter(array('['))) {
+            } elseif ($peek->isDelimiter(['['])) {
                 $stream->getNext();
                 $result = $this->parseAttributeNode($result, $stream);
-            } elseif ($peek->isDelimiter(array(':'))) {
+            } elseif ($peek->isDelimiter([':'])) {
                 $stream->getNext();
 
-                if ($stream->getPeek()->isDelimiter(array(':'))) {
+                if ($stream->getPeek()->isDelimiter([':'])) {
                     $stream->getNext();
                     $pseudoElement = $stream->getNextIdentifier();
 
@@ -187,7 +187,7 @@ class Parser implements ParserInterface
                 }
 
                 $identifier = $stream->getNextIdentifier();
-                if (\in_array(strtolower($identifier), array('first-line', 'first-letter', 'before', 'after'))) {
+                if (\in_array(strtolower($identifier), ['first-line', 'first-letter', 'before', 'after'])) {
                     // Special case: CSS 2.1 pseudo-elements can have a single ':'.
                     // Any new pseudo-element must have two.
                     $pseudoElement = $identifier;
@@ -195,7 +195,7 @@ class Parser implements ParserInterface
                     continue;
                 }
 
-                if (!$stream->getPeek()->isDelimiter(array('('))) {
+                if (!$stream->getPeek()->isDelimiter(['('])) {
                     $result = new Node\PseudoNode($result, $identifier);
 
                     continue;
@@ -216,13 +216,13 @@ class Parser implements ParserInterface
                         throw SyntaxErrorException::pseudoElementFound($argumentPseudoElement, 'inside ::not()');
                     }
 
-                    if (!$next->isDelimiter(array(')'))) {
+                    if (!$next->isDelimiter([')'])) {
                         throw SyntaxErrorException::unexpectedToken('")"', $next);
                     }
 
                     $result = new Node\NegationNode($result, $argument);
                 } else {
-                    $arguments = array();
+                    $arguments = [];
                     $next = null;
 
                     while (true) {
@@ -232,10 +232,10 @@ class Parser implements ParserInterface
                         if ($next->isIdentifier()
                             || $next->isString()
                             || $next->isNumber()
-                            || $next->isDelimiter(array('+', '-'))
+                            || $next->isDelimiter(['+', '-'])
                         ) {
                             $arguments[] = $next;
-                        } elseif ($next->isDelimiter(array(')'))) {
+                        } elseif ($next->isDelimiter([')'])) {
                             break;
                         } else {
                             throw SyntaxErrorException::unexpectedToken('an argument', $next);
@@ -257,14 +257,14 @@ class Parser implements ParserInterface
             throw SyntaxErrorException::unexpectedToken('selector', $stream->getPeek());
         }
 
-        return array($result, $pseudoElement);
+        return [$result, $pseudoElement];
     }
 
     private function parseElementNode(TokenStream $stream): Node\ElementNode
     {
         $peek = $stream->getPeek();
 
-        if ($peek->isIdentifier() || $peek->isDelimiter(array('*'))) {
+        if ($peek->isIdentifier() || $peek->isDelimiter(['*'])) {
             if ($peek->isIdentifier()) {
                 $namespace = $stream->getNext()->getValue();
             } else {
@@ -272,7 +272,7 @@ class Parser implements ParserInterface
                 $namespace = null;
             }
 
-            if ($stream->getPeek()->isDelimiter(array('|'))) {
+            if ($stream->getPeek()->isDelimiter(['|'])) {
                 $stream->getNext();
                 $element = $stream->getNextIdentifierOrStar();
             } else {
@@ -291,14 +291,14 @@ class Parser implements ParserInterface
         $stream->skipWhitespace();
         $attribute = $stream->getNextIdentifierOrStar();
 
-        if (null === $attribute && !$stream->getPeek()->isDelimiter(array('|'))) {
+        if (null === $attribute && !$stream->getPeek()->isDelimiter(['|'])) {
             throw SyntaxErrorException::unexpectedToken('"|"', $stream->getPeek());
         }
 
-        if ($stream->getPeek()->isDelimiter(array('|'))) {
+        if ($stream->getPeek()->isDelimiter(['|'])) {
             $stream->getNext();
 
-            if ($stream->getPeek()->isDelimiter(array('='))) {
+            if ($stream->getPeek()->isDelimiter(['='])) {
                 $namespace = null;
                 $stream->getNext();
                 $operator = '|=';
@@ -315,12 +315,12 @@ class Parser implements ParserInterface
             $stream->skipWhitespace();
             $next = $stream->getNext();
 
-            if ($next->isDelimiter(array(']'))) {
+            if ($next->isDelimiter([']'])) {
                 return new Node\AttributeNode($selector, $namespace, $attribute, 'exists', null);
-            } elseif ($next->isDelimiter(array('='))) {
+            } elseif ($next->isDelimiter(['='])) {
                 $operator = '=';
-            } elseif ($next->isDelimiter(array('^', '$', '*', '~', '|', '!'))
-                && $stream->getPeek()->isDelimiter(array('='))
+            } elseif ($next->isDelimiter(['^', '$', '*', '~', '|', '!'])
+                && $stream->getPeek()->isDelimiter(['='])
             ) {
                 $operator = $next->getValue().'=';
                 $stream->getNext();
@@ -344,7 +344,7 @@ class Parser implements ParserInterface
         $stream->skipWhitespace();
         $next = $stream->getNext();
 
-        if (!$next->isDelimiter(array(']'))) {
+        if (!$next->isDelimiter([']'])) {
             throw SyntaxErrorException::unexpectedToken('"]"', $next);
         }
 
diff --git a/src/Symfony/Component/CssSelector/Parser/Shortcut/ClassParser.php b/src/Symfony/Component/CssSelector/Parser/Shortcut/ClassParser.php
index ce7b20ef2e..17fa8c27e7 100644
--- a/src/Symfony/Component/CssSelector/Parser/Shortcut/ClassParser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Shortcut/ClassParser.php
@@ -41,11 +41,11 @@ class ClassParser implements ParserInterface
         //     2 => string 'input' (length=5)
         //     3 => string 'ab6bd_field' (length=11)
         if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+\.([\w-]++)$/i', trim($source), $matches)) {
-            return array(
+            return [
                 new SelectorNode(new ClassNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null), $matches[3])),
-            );
+            ];
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Parser/Shortcut/ElementParser.php b/src/Symfony/Component/CssSelector/Parser/Shortcut/ElementParser.php
index 3b93f0068f..8b9a863869 100644
--- a/src/Symfony/Component/CssSelector/Parser/Shortcut/ElementParser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Shortcut/ElementParser.php
@@ -39,9 +39,9 @@ class ElementParser implements ParserInterface
         //     1 => string 'testns' (length=6)
         //     2 => string 'testel' (length=6)
         if (preg_match('/^(?:([a-z]++)\|)?([\w-]++|\*)$/i', trim($source), $matches)) {
-            return array(new SelectorNode(new ElementNode($matches[1] ?: null, $matches[2])));
+            return [new SelectorNode(new ElementNode($matches[1] ?: null, $matches[2]))];
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Parser/Shortcut/EmptyStringParser.php b/src/Symfony/Component/CssSelector/Parser/Shortcut/EmptyStringParser.php
index e8a89cc4db..222df5cd29 100644
--- a/src/Symfony/Component/CssSelector/Parser/Shortcut/EmptyStringParser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Shortcut/EmptyStringParser.php
@@ -38,9 +38,9 @@ class EmptyStringParser implements ParserInterface
     {
         // Matches an empty string
         if ('' == $source) {
-            return array(new SelectorNode(new ElementNode(null, '*')));
+            return [new SelectorNode(new ElementNode(null, '*'))];
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Parser/Shortcut/HashParser.php b/src/Symfony/Component/CssSelector/Parser/Shortcut/HashParser.php
index e94ce0a46a..fb07ee6cf8 100644
--- a/src/Symfony/Component/CssSelector/Parser/Shortcut/HashParser.php
+++ b/src/Symfony/Component/CssSelector/Parser/Shortcut/HashParser.php
@@ -41,11 +41,11 @@ class HashParser implements ParserInterface
         //     2 => string 'input' (length=5)
         //     3 => string 'ab6bd_field' (length=11)
         if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+#([\w-]++)$/i', trim($source), $matches)) {
-            return array(
+            return [
                 new SelectorNode(new HashNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null), $matches[3])),
-            );
+            ];
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Parser/Token.php b/src/Symfony/Component/CssSelector/Parser/Token.php
index 91a98f7154..9a324854b2 100644
--- a/src/Symfony/Component/CssSelector/Parser/Token.php
+++ b/src/Symfony/Component/CssSelector/Parser/Token.php
@@ -62,7 +62,7 @@ class Token
         return self::TYPE_FILE_END === $this->type;
     }
 
-    public function isDelimiter(array $values = array()): bool
+    public function isDelimiter(array $values = []): bool
     {
         if (self::TYPE_DELIMITER !== $this->type) {
             return false;
diff --git a/src/Symfony/Component/CssSelector/Parser/TokenStream.php b/src/Symfony/Component/CssSelector/Parser/TokenStream.php
index d2aee541cd..843e330b52 100644
--- a/src/Symfony/Component/CssSelector/Parser/TokenStream.php
+++ b/src/Symfony/Component/CssSelector/Parser/TokenStream.php
@@ -29,12 +29,12 @@ class TokenStream
     /**
      * @var Token[]
      */
-    private $tokens = array();
+    private $tokens = [];
 
     /**
      * @var Token[]
      */
-    private $used = array();
+    private $used = [];
 
     /**
      * @var int
@@ -154,7 +154,7 @@ class TokenStream
             return $next->getValue();
         }
 
-        if ($next->isDelimiter(array('*'))) {
+        if ($next->isDelimiter(['*'])) {
             return;
         }
 
diff --git a/src/Symfony/Component/CssSelector/Parser/Tokenizer/Tokenizer.php b/src/Symfony/Component/CssSelector/Parser/Tokenizer/Tokenizer.php
index e32b4d20ce..fc65bc6846 100644
--- a/src/Symfony/Component/CssSelector/Parser/Tokenizer/Tokenizer.php
+++ b/src/Symfony/Component/CssSelector/Parser/Tokenizer/Tokenizer.php
@@ -38,14 +38,14 @@ class Tokenizer
         $patterns = new TokenizerPatterns();
         $escaping = new TokenizerEscaping($patterns);
 
-        $this->handlers = array(
+        $this->handlers = [
             new Handler\WhitespaceHandler(),
             new Handler\IdentifierHandler($patterns, $escaping),
             new Handler\HashHandler($patterns, $escaping),
             new Handler\StringHandler($patterns, $escaping),
             new Handler\NumberHandler($patterns),
             new Handler\CommentHandler(),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php b/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
index a3eea7ad21..cd0fd785e5 100644
--- a/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/CssSelectorConverterTest.php
@@ -55,22 +55,22 @@ class CssSelectorConverterTest extends TestCase
 
     public function getCssToXPathWithoutPrefixTestData()
     {
-        return array(
-            array('h1', 'h1'),
-            array('foo|h1', 'foo:h1'),
-            array('h1, h2, h3', 'h1 | h2 | h3'),
-            array('h1:nth-child(3n+1)', "*/*[(name() = 'h1') and (position() - 1 >= 0 and (position() - 1) mod 3 = 0)]"),
-            array('h1 > p', 'h1/p'),
-            array('h1#foo', "h1[@id = 'foo']"),
-            array('h1.foo', "h1[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"),
-            array('h1[class*="foo bar"]', "h1[@class and contains(@class, 'foo bar')]"),
-            array('h1[foo|class*="foo bar"]', "h1[@foo:class and contains(@foo:class, 'foo bar')]"),
-            array('h1[class]', 'h1[@class]'),
-            array('h1 .foo', "h1/descendant-or-self::*/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"),
-            array('h1 #foo', "h1/descendant-or-self::*/*[@id = 'foo']"),
-            array('h1 [class*=foo]', "h1/descendant-or-self::*/*[@class and contains(@class, 'foo')]"),
-            array('div>.foo', "div/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"),
-            array('div > .foo', "div/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"),
-        );
+        return [
+            ['h1', 'h1'],
+            ['foo|h1', 'foo:h1'],
+            ['h1, h2, h3', 'h1 | h2 | h3'],
+            ['h1:nth-child(3n+1)', "*/*[(name() = 'h1') and (position() - 1 >= 0 and (position() - 1) mod 3 = 0)]"],
+            ['h1 > p', 'h1/p'],
+            ['h1#foo', "h1[@id = 'foo']"],
+            ['h1.foo', "h1[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"],
+            ['h1[class*="foo bar"]', "h1[@class and contains(@class, 'foo bar')]"],
+            ['h1[foo|class*="foo bar"]', "h1[@foo:class and contains(@foo:class, 'foo bar')]"],
+            ['h1[class]', 'h1[@class]'],
+            ['h1 .foo', "h1/descendant-or-self::*/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"],
+            ['h1 #foo', "h1/descendant-or-self::*/*[@id = 'foo']"],
+            ['h1 [class*=foo]', "h1/descendant-or-self::*/*[@class and contains(@class, 'foo')]"],
+            ['div>.foo', "div/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"],
+            ['div > .foo', "div/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' foo ')]"],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/AttributeNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/AttributeNodeTest.php
index 1fd090f5a6..4d60074061 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/AttributeNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/AttributeNodeTest.php
@@ -18,20 +18,20 @@ class AttributeNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 'Attribute[Element[*][attribute]]'),
-            array(new AttributeNode(new ElementNode(), null, 'attribute', '$=', 'value'), "Attribute[Element[*][attribute $= 'value']]"),
-            array(new AttributeNode(new ElementNode(), 'namespace', 'attribute', '$=', 'value'), "Attribute[Element[*][namespace|attribute $= 'value']]"),
-        );
+        return [
+            [new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 'Attribute[Element[*][attribute]]'],
+            [new AttributeNode(new ElementNode(), null, 'attribute', '$=', 'value'), "Attribute[Element[*][attribute $= 'value']]"],
+            [new AttributeNode(new ElementNode(), 'namespace', 'attribute', '$=', 'value'), "Attribute[Element[*][namespace|attribute $= 'value']]"],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 10),
-            array(new AttributeNode(new ElementNode(null, 'element'), null, 'attribute', 'exists', null), 11),
-            array(new AttributeNode(new ElementNode(), null, 'attribute', '$=', 'value'), 10),
-            array(new AttributeNode(new ElementNode(), 'namespace', 'attribute', '$=', 'value'), 10),
-        );
+        return [
+            [new AttributeNode(new ElementNode(), null, 'attribute', 'exists', null), 10],
+            [new AttributeNode(new ElementNode(null, 'element'), null, 'attribute', 'exists', null), 11],
+            [new AttributeNode(new ElementNode(), null, 'attribute', '$=', 'value'), 10],
+            [new AttributeNode(new ElementNode(), 'namespace', 'attribute', '$=', 'value'), 10],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/ClassNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/ClassNodeTest.php
index e0ab45accc..aa80c92792 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/ClassNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/ClassNodeTest.php
@@ -18,16 +18,16 @@ class ClassNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new ClassNode(new ElementNode(), 'class'), 'Class[Element[*].class]'),
-        );
+        return [
+            [new ClassNode(new ElementNode(), 'class'), 'Class[Element[*].class]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new ClassNode(new ElementNode(), 'class'), 10),
-            array(new ClassNode(new ElementNode(null, 'element'), 'class'), 11),
-        );
+        return [
+            [new ClassNode(new ElementNode(), 'class'), 10],
+            [new ClassNode(new ElementNode(null, 'element'), 'class'), 11],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/CombinedSelectorNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/CombinedSelectorNodeTest.php
index 9547298a6f..435eaa6aa6 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/CombinedSelectorNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/CombinedSelectorNodeTest.php
@@ -18,18 +18,18 @@ class CombinedSelectorNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 'CombinedSelector[Element[*] > Element[*]]'),
-            array(new CombinedSelectorNode(new ElementNode(), ' ', new ElementNode()), 'CombinedSelector[Element[*] <followed> Element[*]]'),
-        );
+        return [
+            [new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 'CombinedSelector[Element[*] > Element[*]]'],
+            [new CombinedSelectorNode(new ElementNode(), ' ', new ElementNode()), 'CombinedSelector[Element[*] <followed> Element[*]]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 0),
-            array(new CombinedSelectorNode(new ElementNode(null, 'element'), '>', new ElementNode()), 1),
-            array(new CombinedSelectorNode(new ElementNode(null, 'element'), '>', new ElementNode(null, 'element')), 2),
-        );
+        return [
+            [new CombinedSelectorNode(new ElementNode(), '>', new ElementNode()), 0],
+            [new CombinedSelectorNode(new ElementNode(null, 'element'), '>', new ElementNode()), 1],
+            [new CombinedSelectorNode(new ElementNode(null, 'element'), '>', new ElementNode(null, 'element')), 2],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/ElementNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/ElementNodeTest.php
index 6d24789320..e0797ff09c 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/ElementNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/ElementNodeTest.php
@@ -17,19 +17,19 @@ class ElementNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new ElementNode(), 'Element[*]'),
-            array(new ElementNode(null, 'element'), 'Element[element]'),
-            array(new ElementNode('namespace', 'element'), 'Element[namespace|element]'),
-        );
+        return [
+            [new ElementNode(), 'Element[*]'],
+            [new ElementNode(null, 'element'), 'Element[element]'],
+            [new ElementNode('namespace', 'element'), 'Element[namespace|element]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new ElementNode(), 0),
-            array(new ElementNode(null, 'element'), 1),
-            array(new ElementNode('namespace', 'element'), 1),
-        );
+        return [
+            [new ElementNode(), 0],
+            [new ElementNode(null, 'element'), 1],
+            [new ElementNode('namespace', 'element'), 1],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/FunctionNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/FunctionNodeTest.php
index ee3ce51ba5..0932393e1a 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/FunctionNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/FunctionNodeTest.php
@@ -19,29 +19,29 @@ class FunctionNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new FunctionNode(new ElementNode(), 'function'), 'Function[Element[*]:function()]'),
-            array(new FunctionNode(new ElementNode(), 'function', array(
+        return [
+            [new FunctionNode(new ElementNode(), 'function'), 'Function[Element[*]:function()]'],
+            [new FunctionNode(new ElementNode(), 'function', [
                 new Token(Token::TYPE_IDENTIFIER, 'value', 0),
-            )), "Function[Element[*]:function(['value'])]"),
-            array(new FunctionNode(new ElementNode(), 'function', array(
+            ]), "Function[Element[*]:function(['value'])]"],
+            [new FunctionNode(new ElementNode(), 'function', [
                 new Token(Token::TYPE_STRING, 'value1', 0),
                 new Token(Token::TYPE_NUMBER, 'value2', 0),
-            )), "Function[Element[*]:function(['value1', 'value2'])]"),
-        );
+            ]), "Function[Element[*]:function(['value1', 'value2'])]"],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new FunctionNode(new ElementNode(), 'function'), 10),
-            array(new FunctionNode(new ElementNode(), 'function', array(
+        return [
+            [new FunctionNode(new ElementNode(), 'function'), 10],
+            [new FunctionNode(new ElementNode(), 'function', [
                 new Token(Token::TYPE_IDENTIFIER, 'value', 0),
-            )), 10),
-            array(new FunctionNode(new ElementNode(), 'function', array(
+            ]), 10],
+            [new FunctionNode(new ElementNode(), 'function', [
                 new Token(Token::TYPE_STRING, 'value1', 0),
                 new Token(Token::TYPE_NUMBER, 'value2', 0),
-            )), 10),
-        );
+            ]), 10],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/HashNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/HashNodeTest.php
index 3bc74da945..ad6765b862 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/HashNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/HashNodeTest.php
@@ -18,16 +18,16 @@ class HashNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new HashNode(new ElementNode(), 'id'), 'Hash[Element[*]#id]'),
-        );
+        return [
+            [new HashNode(new ElementNode(), 'id'), 'Hash[Element[*]#id]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new HashNode(new ElementNode(), 'id'), 100),
-            array(new HashNode(new ElementNode(null, 'id'), 'class'), 101),
-        );
+        return [
+            [new HashNode(new ElementNode(), 'id'), 100],
+            [new HashNode(new ElementNode(null, 'id'), 'class'), 101],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/NegationNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/NegationNodeTest.php
index ed4d2482c3..90b684ceec 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/NegationNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/NegationNodeTest.php
@@ -19,15 +19,15 @@ class NegationNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 'Negation[Element[*]:not(Class[Element[*].class])]'),
-        );
+        return [
+            [new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 'Negation[Element[*]:not(Class[Element[*].class])]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 10),
-        );
+        return [
+            [new NegationNode(new ElementNode(), new ClassNode(new ElementNode(), 'class')), 10],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/PseudoNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/PseudoNodeTest.php
index bc57813cc8..4e78776c02 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/PseudoNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/PseudoNodeTest.php
@@ -18,15 +18,15 @@ class PseudoNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new PseudoNode(new ElementNode(), 'pseudo'), 'Pseudo[Element[*]:pseudo]'),
-        );
+        return [
+            [new PseudoNode(new ElementNode(), 'pseudo'), 'Pseudo[Element[*]:pseudo]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new PseudoNode(new ElementNode(), 'pseudo'), 10),
-        );
+        return [
+            [new PseudoNode(new ElementNode(), 'pseudo'), 10],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/SelectorNodeTest.php b/src/Symfony/Component/CssSelector/Tests/Node/SelectorNodeTest.php
index 5badf71d16..85e3bdac3f 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/SelectorNodeTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/SelectorNodeTest.php
@@ -18,17 +18,17 @@ class SelectorNodeTest extends AbstractNodeTest
 {
     public function getToStringConversionTestData()
     {
-        return array(
-            array(new SelectorNode(new ElementNode()), 'Selector[Element[*]]'),
-            array(new SelectorNode(new ElementNode(), 'pseudo'), 'Selector[Element[*]::pseudo]'),
-        );
+        return [
+            [new SelectorNode(new ElementNode()), 'Selector[Element[*]]'],
+            [new SelectorNode(new ElementNode(), 'pseudo'), 'Selector[Element[*]::pseudo]'],
+        ];
     }
 
     public function getSpecificityValueTestData()
     {
-        return array(
-            array(new SelectorNode(new ElementNode()), 0),
-            array(new SelectorNode(new ElementNode(), 'pseudo'), 1),
-        );
+        return [
+            [new SelectorNode(new ElementNode()), 0],
+            [new SelectorNode(new ElementNode(), 'pseudo'), 1],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php b/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
index b58eb8929c..bf48d49ffd 100644
--- a/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Node/SpecificityTest.php
@@ -30,13 +30,13 @@ class SpecificityTest extends TestCase
 
     public function getValueTestData()
     {
-        return array(
-            array(new Specificity(0, 0, 0), 0),
-            array(new Specificity(0, 0, 2), 2),
-            array(new Specificity(0, 3, 0), 30),
-            array(new Specificity(4, 0, 0), 400),
-            array(new Specificity(4, 3, 2), 432),
-        );
+        return [
+            [new Specificity(0, 0, 0), 0],
+            [new Specificity(0, 0, 2), 2],
+            [new Specificity(0, 3, 0), 30],
+            [new Specificity(4, 0, 0), 400],
+            [new Specificity(4, 3, 2), 432],
+        ];
     }
 
     /** @dataProvider getCompareTestData */
@@ -47,17 +47,17 @@ class SpecificityTest extends TestCase
 
     public function getCompareTestData()
     {
-        return array(
-            array(new Specificity(0, 0, 0), new Specificity(0, 0, 0), 0),
-            array(new Specificity(0, 0, 1), new Specificity(0, 0, 1), 0),
-            array(new Specificity(0, 0, 2), new Specificity(0, 0, 1), 1),
-            array(new Specificity(0, 0, 2), new Specificity(0, 0, 3), -1),
-            array(new Specificity(0, 4, 0), new Specificity(0, 4, 0), 0),
-            array(new Specificity(0, 6, 0), new Specificity(0, 5, 11), 1),
-            array(new Specificity(0, 7, 0), new Specificity(0, 8, 0), -1),
-            array(new Specificity(9, 0, 0), new Specificity(9, 0, 0), 0),
-            array(new Specificity(11, 0, 0), new Specificity(10, 11, 0), 1),
-            array(new Specificity(12, 11, 0), new Specificity(13, 0, 0), -1),
-        );
+        return [
+            [new Specificity(0, 0, 0), new Specificity(0, 0, 0), 0],
+            [new Specificity(0, 0, 1), new Specificity(0, 0, 1), 0],
+            [new Specificity(0, 0, 2), new Specificity(0, 0, 1), 1],
+            [new Specificity(0, 0, 2), new Specificity(0, 0, 3), -1],
+            [new Specificity(0, 4, 0), new Specificity(0, 4, 0), 0],
+            [new Specificity(0, 6, 0), new Specificity(0, 5, 11), 1],
+            [new Specificity(0, 7, 0), new Specificity(0, 8, 0), -1],
+            [new Specificity(9, 0, 0), new Specificity(9, 0, 0), 0],
+            [new Specificity(11, 0, 0), new Specificity(10, 11, 0), 1],
+            [new Specificity(12, 11, 0), new Specificity(13, 0, 0), -1],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
index f5c9dc8bfe..aaed55c205 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/AbstractHandlerTest.php
@@ -54,7 +54,7 @@ abstract class AbstractHandlerTest extends TestCase
         $property = new \ReflectionProperty($stream, 'tokens');
         $property->setAccessible(true);
 
-        $this->assertEquals(array(), $property->getValue($stream));
+        $this->assertEquals([], $property->getValue($stream));
     }
 
     protected function assertRemainingContent(Reader $reader, $remainingContent)
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/CommentHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/CommentHandlerTest.php
index 3961bf7d55..de400478d8 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/CommentHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/CommentHandlerTest.php
@@ -32,20 +32,20 @@ class CommentHandlerTest extends AbstractHandlerTest
 
     public function getHandleValueTestData()
     {
-        return array(
+        return [
             // 2nd argument only exists for inherited method compatibility
-            array('/* comment */', new Token(null, null, null), ''),
-            array('/* comment */foo', new Token(null, null, null), 'foo'),
-        );
+            ['/* comment */', new Token(null, null, null), ''],
+            ['/* comment */foo', new Token(null, null, null), 'foo'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('>'),
-            array('+'),
-            array(' '),
-        );
+        return [
+            ['>'],
+            ['+'],
+            [' '],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/HashHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/HashHandlerTest.php
index 5730120bf7..9444f5106f 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/HashHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/HashHandlerTest.php
@@ -20,24 +20,24 @@ class HashHandlerTest extends AbstractHandlerTest
 {
     public function getHandleValueTestData()
     {
-        return array(
-            array('#id', new Token(Token::TYPE_HASH, 'id', 0), ''),
-            array('#123', new Token(Token::TYPE_HASH, '123', 0), ''),
+        return [
+            ['#id', new Token(Token::TYPE_HASH, 'id', 0), ''],
+            ['#123', new Token(Token::TYPE_HASH, '123', 0), ''],
 
-            array('#id.class', new Token(Token::TYPE_HASH, 'id', 0), '.class'),
-            array('#id element', new Token(Token::TYPE_HASH, 'id', 0), ' element'),
-        );
+            ['#id.class', new Token(Token::TYPE_HASH, 'id', 0), '.class'],
+            ['#id element', new Token(Token::TYPE_HASH, 'id', 0), ' element'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('id'),
-            array('123'),
-            array('<'),
-            array('<'),
-            array('#'),
-        );
+        return [
+            ['id'],
+            ['123'],
+            ['<'],
+            ['<'],
+            ['#'],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/IdentifierHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/IdentifierHandlerTest.php
index f56430c7e8..c54ba537b8 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/IdentifierHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/IdentifierHandlerTest.php
@@ -20,24 +20,24 @@ class IdentifierHandlerTest extends AbstractHandlerTest
 {
     public function getHandleValueTestData()
     {
-        return array(
-            array('foo', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), ''),
-            array('foo|bar', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '|bar'),
-            array('foo.class', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '.class'),
-            array('foo[attr]', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '[attr]'),
-            array('foo bar', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), ' bar'),
-        );
+        return [
+            ['foo', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), ''],
+            ['foo|bar', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '|bar'],
+            ['foo.class', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '.class'],
+            ['foo[attr]', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), '[attr]'],
+            ['foo bar', new Token(Token::TYPE_IDENTIFIER, 'foo', 0), ' bar'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('>'),
-            array('+'),
-            array(' '),
-            array('*|foo'),
-            array('/* comment */'),
-        );
+        return [
+            ['>'],
+            ['+'],
+            [' '],
+            ['*|foo'],
+            ['/* comment */'],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/NumberHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/NumberHandlerTest.php
index 675fd05b43..b43d369421 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/NumberHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/NumberHandlerTest.php
@@ -19,26 +19,26 @@ class NumberHandlerTest extends AbstractHandlerTest
 {
     public function getHandleValueTestData()
     {
-        return array(
-            array('12', new Token(Token::TYPE_NUMBER, '12', 0), ''),
-            array('12.34', new Token(Token::TYPE_NUMBER, '12.34', 0), ''),
-            array('+12.34', new Token(Token::TYPE_NUMBER, '+12.34', 0), ''),
-            array('-12.34', new Token(Token::TYPE_NUMBER, '-12.34', 0), ''),
+        return [
+            ['12', new Token(Token::TYPE_NUMBER, '12', 0), ''],
+            ['12.34', new Token(Token::TYPE_NUMBER, '12.34', 0), ''],
+            ['+12.34', new Token(Token::TYPE_NUMBER, '+12.34', 0), ''],
+            ['-12.34', new Token(Token::TYPE_NUMBER, '-12.34', 0), ''],
 
-            array('12 arg', new Token(Token::TYPE_NUMBER, '12', 0), ' arg'),
-            array('12]', new Token(Token::TYPE_NUMBER, '12', 0), ']'),
-        );
+            ['12 arg', new Token(Token::TYPE_NUMBER, '12', 0), ' arg'],
+            ['12]', new Token(Token::TYPE_NUMBER, '12', 0), ']'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('hello'),
-            array('>'),
-            array('+'),
-            array(' '),
-            array('/* comment */'),
-        );
+        return [
+            ['hello'],
+            ['>'],
+            ['+'],
+            [' '],
+            ['/* comment */'],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php
index 8ea5d4d587..baa72735ff 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/StringHandlerTest.php
@@ -20,25 +20,25 @@ class StringHandlerTest extends AbstractHandlerTest
 {
     public function getHandleValueTestData()
     {
-        return array(
-            array('"hello"', new Token(Token::TYPE_STRING, 'hello', 1), ''),
-            array('"1"', new Token(Token::TYPE_STRING, '1', 1), ''),
-            array('" "', new Token(Token::TYPE_STRING, ' ', 1), ''),
-            array('""', new Token(Token::TYPE_STRING, '', 1), ''),
-            array("'hello'", new Token(Token::TYPE_STRING, 'hello', 1), ''),
+        return [
+            ['"hello"', new Token(Token::TYPE_STRING, 'hello', 1), ''],
+            ['"1"', new Token(Token::TYPE_STRING, '1', 1), ''],
+            ['" "', new Token(Token::TYPE_STRING, ' ', 1), ''],
+            ['""', new Token(Token::TYPE_STRING, '', 1), ''],
+            ["'hello'", new Token(Token::TYPE_STRING, 'hello', 1), ''],
 
-            array("'foo'bar", new Token(Token::TYPE_STRING, 'foo', 1), 'bar'),
-        );
+            ["'foo'bar", new Token(Token::TYPE_STRING, 'foo', 1), 'bar'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('hello'),
-            array('>'),
-            array('1'),
-            array(' '),
-        );
+        return [
+            ['hello'],
+            ['>'],
+            ['1'],
+            [' '],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/WhitespaceHandlerTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/WhitespaceHandlerTest.php
index f5f9e71dc2..67509ef135 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Handler/WhitespaceHandlerTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Handler/WhitespaceHandlerTest.php
@@ -18,23 +18,23 @@ class WhitespaceHandlerTest extends AbstractHandlerTest
 {
     public function getHandleValueTestData()
     {
-        return array(
-            array(' ', new Token(Token::TYPE_WHITESPACE, ' ', 0), ''),
-            array("\n", new Token(Token::TYPE_WHITESPACE, "\n", 0), ''),
-            array("\t", new Token(Token::TYPE_WHITESPACE, "\t", 0), ''),
+        return [
+            [' ', new Token(Token::TYPE_WHITESPACE, ' ', 0), ''],
+            ["\n", new Token(Token::TYPE_WHITESPACE, "\n", 0), ''],
+            ["\t", new Token(Token::TYPE_WHITESPACE, "\t", 0), ''],
 
-            array(' foo', new Token(Token::TYPE_WHITESPACE, ' ', 0), 'foo'),
-            array(' .foo', new Token(Token::TYPE_WHITESPACE, ' ', 0), '.foo'),
-        );
+            [' foo', new Token(Token::TYPE_WHITESPACE, ' ', 0), 'foo'],
+            [' .foo', new Token(Token::TYPE_WHITESPACE, ' ', 0), '.foo'],
+        ];
     }
 
     public function getDontHandleValueTestData()
     {
-        return array(
-            array('>'),
-            array('1'),
-            array('a'),
-        );
+        return [
+            ['>'],
+            ['1'],
+            ['a'],
+        ];
     }
 
     protected function generateHandler()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
index 66403d4f49..f63a15e0ab 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/ParserTest.php
@@ -77,7 +77,7 @@ class ParserTest extends TestCase
 
         /** @var FunctionNode $function */
         $function = $selectors[0]->getTree();
-        $this->assertEquals(array($a, $b), Parser::parseSeries($function->getArguments()));
+        $this->assertEquals([$a, $b], Parser::parseSeries($function->getArguments()));
     }
 
     /** @dataProvider getParseSeriesExceptionTestData */
@@ -95,159 +95,159 @@ class ParserTest extends TestCase
 
     public function getParserTestData()
     {
-        return array(
-            array('*', array('Element[*]')),
-            array('*|*', array('Element[*]')),
-            array('*|foo', array('Element[foo]')),
-            array('foo|*', array('Element[foo|*]')),
-            array('foo|bar', array('Element[foo|bar]')),
-            array('#foo#bar', array('Hash[Hash[Element[*]#foo]#bar]')),
-            array('div>.foo', array('CombinedSelector[Element[div] > Class[Element[*].foo]]')),
-            array('div> .foo', array('CombinedSelector[Element[div] > Class[Element[*].foo]]')),
-            array('div >.foo', array('CombinedSelector[Element[div] > Class[Element[*].foo]]')),
-            array('div > .foo', array('CombinedSelector[Element[div] > Class[Element[*].foo]]')),
-            array("div \n>  \t \t .foo", array('CombinedSelector[Element[div] > Class[Element[*].foo]]')),
-            array('td.foo,.bar', array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array('td.foo, .bar', array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array("td.foo\t\r\n\f ,\t\r\n\f .bar", array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array('td.foo,.bar', array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array('td.foo, .bar', array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array("td.foo\t\r\n\f ,\t\r\n\f .bar", array('Class[Element[td].foo]', 'Class[Element[*].bar]')),
-            array('div, td.foo, div.bar span', array('Element[div]', 'Class[Element[td].foo]', 'CombinedSelector[Class[Element[div].bar] <followed> Element[span]]')),
-            array('div > p', array('CombinedSelector[Element[div] > Element[p]]')),
-            array('td:first', array('Pseudo[Element[td]:first]')),
-            array('td :first', array('CombinedSelector[Element[td] <followed> Pseudo[Element[*]:first]]')),
-            array('a[name]', array('Attribute[Element[a][name]]')),
-            array("a[ name\t]", array('Attribute[Element[a][name]]')),
-            array('a [name]', array('CombinedSelector[Element[a] <followed> Attribute[Element[*][name]]]')),
-            array('[name="foo"]', array("Attribute[Element[*][name = 'foo']]")),
-            array("[name='foo[1]']", array("Attribute[Element[*][name = 'foo[1]']]")),
-            array("[name='foo[0][bar]']", array("Attribute[Element[*][name = 'foo[0][bar]']]")),
-            array('a[rel="include"]', array("Attribute[Element[a][rel = 'include']]")),
-            array('a[rel = include]', array("Attribute[Element[a][rel = 'include']]")),
-            array("a[hreflang |= 'en']", array("Attribute[Element[a][hreflang |= 'en']]")),
-            array('a[hreflang|=en]', array("Attribute[Element[a][hreflang |= 'en']]")),
-            array('div:nth-child(10)', array("Function[Element[div]:nth-child(['10'])]")),
-            array(':nth-child(2n+2)', array("Function[Element[*]:nth-child(['2', 'n', '+2'])]")),
-            array('div:nth-of-type(10)', array("Function[Element[div]:nth-of-type(['10'])]")),
-            array('div div:nth-of-type(10) .aclass', array("CombinedSelector[CombinedSelector[Element[div] <followed> Function[Element[div]:nth-of-type(['10'])]] <followed> Class[Element[*].aclass]]")),
-            array('label:only', array('Pseudo[Element[label]:only]')),
-            array('a:lang(fr)', array("Function[Element[a]:lang(['fr'])]")),
-            array('div:contains("foo")', array("Function[Element[div]:contains(['foo'])]")),
-            array('div#foobar', array('Hash[Element[div]#foobar]')),
-            array('div:not(div.foo)', array('Negation[Element[div]:not(Class[Element[div].foo])]')),
-            array('td ~ th', array('CombinedSelector[Element[td] ~ Element[th]]')),
-            array('.foo[data-bar][data-baz=0]', array("Attribute[Attribute[Class[Element[*].foo][data-bar]][data-baz = '0']]")),
-        );
+        return [
+            ['*', ['Element[*]']],
+            ['*|*', ['Element[*]']],
+            ['*|foo', ['Element[foo]']],
+            ['foo|*', ['Element[foo|*]']],
+            ['foo|bar', ['Element[foo|bar]']],
+            ['#foo#bar', ['Hash[Hash[Element[*]#foo]#bar]']],
+            ['div>.foo', ['CombinedSelector[Element[div] > Class[Element[*].foo]]']],
+            ['div> .foo', ['CombinedSelector[Element[div] > Class[Element[*].foo]]']],
+            ['div >.foo', ['CombinedSelector[Element[div] > Class[Element[*].foo]]']],
+            ['div > .foo', ['CombinedSelector[Element[div] > Class[Element[*].foo]]']],
+            ["div \n>  \t \t .foo", ['CombinedSelector[Element[div] > Class[Element[*].foo]]']],
+            ['td.foo,.bar', ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ['td.foo, .bar', ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ["td.foo\t\r\n\f ,\t\r\n\f .bar", ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ['td.foo,.bar', ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ['td.foo, .bar', ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ["td.foo\t\r\n\f ,\t\r\n\f .bar", ['Class[Element[td].foo]', 'Class[Element[*].bar]']],
+            ['div, td.foo, div.bar span', ['Element[div]', 'Class[Element[td].foo]', 'CombinedSelector[Class[Element[div].bar] <followed> Element[span]]']],
+            ['div > p', ['CombinedSelector[Element[div] > Element[p]]']],
+            ['td:first', ['Pseudo[Element[td]:first]']],
+            ['td :first', ['CombinedSelector[Element[td] <followed> Pseudo[Element[*]:first]]']],
+            ['a[name]', ['Attribute[Element[a][name]]']],
+            ["a[ name\t]", ['Attribute[Element[a][name]]']],
+            ['a [name]', ['CombinedSelector[Element[a] <followed> Attribute[Element[*][name]]]']],
+            ['[name="foo"]', ["Attribute[Element[*][name = 'foo']]"]],
+            ["[name='foo[1]']", ["Attribute[Element[*][name = 'foo[1]']]"]],
+            ["[name='foo[0][bar]']", ["Attribute[Element[*][name = 'foo[0][bar]']]"]],
+            ['a[rel="include"]', ["Attribute[Element[a][rel = 'include']]"]],
+            ['a[rel = include]', ["Attribute[Element[a][rel = 'include']]"]],
+            ["a[hreflang |= 'en']", ["Attribute[Element[a][hreflang |= 'en']]"]],
+            ['a[hreflang|=en]', ["Attribute[Element[a][hreflang |= 'en']]"]],
+            ['div:nth-child(10)', ["Function[Element[div]:nth-child(['10'])]"]],
+            [':nth-child(2n+2)', ["Function[Element[*]:nth-child(['2', 'n', '+2'])]"]],
+            ['div:nth-of-type(10)', ["Function[Element[div]:nth-of-type(['10'])]"]],
+            ['div div:nth-of-type(10) .aclass', ["CombinedSelector[CombinedSelector[Element[div] <followed> Function[Element[div]:nth-of-type(['10'])]] <followed> Class[Element[*].aclass]]"]],
+            ['label:only', ['Pseudo[Element[label]:only]']],
+            ['a:lang(fr)', ["Function[Element[a]:lang(['fr'])]"]],
+            ['div:contains("foo")', ["Function[Element[div]:contains(['foo'])]"]],
+            ['div#foobar', ['Hash[Element[div]#foobar]']],
+            ['div:not(div.foo)', ['Negation[Element[div]:not(Class[Element[div].foo])]']],
+            ['td ~ th', ['CombinedSelector[Element[td] ~ Element[th]]']],
+            ['.foo[data-bar][data-baz=0]', ["Attribute[Attribute[Class[Element[*].foo][data-bar]][data-baz = '0']]"]],
+        ];
     }
 
     public function getParserExceptionTestData()
     {
-        return array(
-            array('attributes(href)/html/body/a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '(', 10))->getMessage()),
-            array('attributes(href)', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '(', 10))->getMessage()),
-            array('html/body/a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '/', 4))->getMessage()),
-            array(' ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 1))->getMessage()),
-            array('div, ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 5))->getMessage()),
-            array(' , div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, ',', 1))->getMessage()),
-            array('p, , div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, ',', 3))->getMessage()),
-            array('div > ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 6))->getMessage()),
-            array('  > div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '>', 2))->getMessage()),
-            array('foo|#bar', SyntaxErrorException::unexpectedToken('identifier or "*"', new Token(Token::TYPE_HASH, 'bar', 4))->getMessage()),
-            array('#.foo', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '#', 0))->getMessage()),
-            array('.#foo', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_HASH, 'foo', 1))->getMessage()),
-            array(':#foo', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_HASH, 'foo', 1))->getMessage()),
-            array('[*]', SyntaxErrorException::unexpectedToken('"|"', new Token(Token::TYPE_DELIMITER, ']', 2))->getMessage()),
-            array('[foo|]', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_DELIMITER, ']', 5))->getMessage()),
-            array('[#]', SyntaxErrorException::unexpectedToken('identifier or "*"', new Token(Token::TYPE_DELIMITER, '#', 1))->getMessage()),
-            array('[foo=#]', SyntaxErrorException::unexpectedToken('string or identifier', new Token(Token::TYPE_DELIMITER, '#', 5))->getMessage()),
-            array(':nth-child()', SyntaxErrorException::unexpectedToken('at least one argument', new Token(Token::TYPE_DELIMITER, ')', 11))->getMessage()),
-            array('[href]a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_IDENTIFIER, 'a', 6))->getMessage()),
-            array('[rel:stylesheet]', SyntaxErrorException::unexpectedToken('operator', new Token(Token::TYPE_DELIMITER, ':', 4))->getMessage()),
-            array('[rel=stylesheet', SyntaxErrorException::unexpectedToken('"]"', new Token(Token::TYPE_FILE_END, '', 15))->getMessage()),
-            array(':lang(fr', SyntaxErrorException::unexpectedToken('an argument', new Token(Token::TYPE_FILE_END, '', 8))->getMessage()),
-            array(':contains("foo', SyntaxErrorException::unclosedString(10)->getMessage()),
-            array('foo!', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '!', 3))->getMessage()),
-        );
+        return [
+            ['attributes(href)/html/body/a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '(', 10))->getMessage()],
+            ['attributes(href)', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '(', 10))->getMessage()],
+            ['html/body/a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '/', 4))->getMessage()],
+            [' ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 1))->getMessage()],
+            ['div, ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 5))->getMessage()],
+            [' , div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, ',', 1))->getMessage()],
+            ['p, , div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, ',', 3))->getMessage()],
+            ['div > ', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_FILE_END, '', 6))->getMessage()],
+            ['  > div', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '>', 2))->getMessage()],
+            ['foo|#bar', SyntaxErrorException::unexpectedToken('identifier or "*"', new Token(Token::TYPE_HASH, 'bar', 4))->getMessage()],
+            ['#.foo', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '#', 0))->getMessage()],
+            ['.#foo', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_HASH, 'foo', 1))->getMessage()],
+            [':#foo', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_HASH, 'foo', 1))->getMessage()],
+            ['[*]', SyntaxErrorException::unexpectedToken('"|"', new Token(Token::TYPE_DELIMITER, ']', 2))->getMessage()],
+            ['[foo|]', SyntaxErrorException::unexpectedToken('identifier', new Token(Token::TYPE_DELIMITER, ']', 5))->getMessage()],
+            ['[#]', SyntaxErrorException::unexpectedToken('identifier or "*"', new Token(Token::TYPE_DELIMITER, '#', 1))->getMessage()],
+            ['[foo=#]', SyntaxErrorException::unexpectedToken('string or identifier', new Token(Token::TYPE_DELIMITER, '#', 5))->getMessage()],
+            [':nth-child()', SyntaxErrorException::unexpectedToken('at least one argument', new Token(Token::TYPE_DELIMITER, ')', 11))->getMessage()],
+            ['[href]a', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_IDENTIFIER, 'a', 6))->getMessage()],
+            ['[rel:stylesheet]', SyntaxErrorException::unexpectedToken('operator', new Token(Token::TYPE_DELIMITER, ':', 4))->getMessage()],
+            ['[rel=stylesheet', SyntaxErrorException::unexpectedToken('"]"', new Token(Token::TYPE_FILE_END, '', 15))->getMessage()],
+            [':lang(fr', SyntaxErrorException::unexpectedToken('an argument', new Token(Token::TYPE_FILE_END, '', 8))->getMessage()],
+            [':contains("foo', SyntaxErrorException::unclosedString(10)->getMessage()],
+            ['foo!', SyntaxErrorException::unexpectedToken('selector', new Token(Token::TYPE_DELIMITER, '!', 3))->getMessage()],
+        ];
     }
 
     public function getPseudoElementsTestData()
     {
-        return array(
-            array('foo', 'Element[foo]', ''),
-            array('*', 'Element[*]', ''),
-            array(':empty', 'Pseudo[Element[*]:empty]', ''),
-            array(':BEfore', 'Element[*]', 'before'),
-            array(':aftER', 'Element[*]', 'after'),
-            array(':First-Line', 'Element[*]', 'first-line'),
-            array(':First-Letter', 'Element[*]', 'first-letter'),
-            array('::befoRE', 'Element[*]', 'before'),
-            array('::AFter', 'Element[*]', 'after'),
-            array('::firsT-linE', 'Element[*]', 'first-line'),
-            array('::firsT-letteR', 'Element[*]', 'first-letter'),
-            array('::Selection', 'Element[*]', 'selection'),
-            array('foo:after', 'Element[foo]', 'after'),
-            array('foo::selection', 'Element[foo]', 'selection'),
-            array('lorem#ipsum ~ a#b.c[href]:empty::selection', 'CombinedSelector[Hash[Element[lorem]#ipsum] ~ Pseudo[Attribute[Class[Hash[Element[a]#b].c][href]]:empty]]', 'selection'),
-            array('video::-webkit-media-controls', 'Element[video]', '-webkit-media-controls'),
-        );
+        return [
+            ['foo', 'Element[foo]', ''],
+            ['*', 'Element[*]', ''],
+            [':empty', 'Pseudo[Element[*]:empty]', ''],
+            [':BEfore', 'Element[*]', 'before'],
+            [':aftER', 'Element[*]', 'after'],
+            [':First-Line', 'Element[*]', 'first-line'],
+            [':First-Letter', 'Element[*]', 'first-letter'],
+            ['::befoRE', 'Element[*]', 'before'],
+            ['::AFter', 'Element[*]', 'after'],
+            ['::firsT-linE', 'Element[*]', 'first-line'],
+            ['::firsT-letteR', 'Element[*]', 'first-letter'],
+            ['::Selection', 'Element[*]', 'selection'],
+            ['foo:after', 'Element[foo]', 'after'],
+            ['foo::selection', 'Element[foo]', 'selection'],
+            ['lorem#ipsum ~ a#b.c[href]:empty::selection', 'CombinedSelector[Hash[Element[lorem]#ipsum] ~ Pseudo[Attribute[Class[Hash[Element[a]#b].c][href]]:empty]]', 'selection'],
+            ['video::-webkit-media-controls', 'Element[video]', '-webkit-media-controls'],
+        ];
     }
 
     public function getSpecificityTestData()
     {
-        return array(
-            array('*', 0),
-            array(' foo', 1),
-            array(':empty ', 10),
-            array(':before', 1),
-            array('*:before', 1),
-            array(':nth-child(2)', 10),
-            array('.bar', 10),
-            array('[baz]', 10),
-            array('[baz="4"]', 10),
-            array('[baz^="4"]', 10),
-            array('#lipsum', 100),
-            array(':not(*)', 0),
-            array(':not(foo)', 1),
-            array(':not(.foo)', 10),
-            array(':not([foo])', 10),
-            array(':not(:empty)', 10),
-            array(':not(#foo)', 100),
-            array('foo:empty', 11),
-            array('foo:before', 2),
-            array('foo::before', 2),
-            array('foo:empty::before', 12),
-            array('#lorem + foo#ipsum:first-child > bar:first-line', 213),
-        );
+        return [
+            ['*', 0],
+            [' foo', 1],
+            [':empty ', 10],
+            [':before', 1],
+            ['*:before', 1],
+            [':nth-child(2)', 10],
+            ['.bar', 10],
+            ['[baz]', 10],
+            ['[baz="4"]', 10],
+            ['[baz^="4"]', 10],
+            ['#lipsum', 100],
+            [':not(*)', 0],
+            [':not(foo)', 1],
+            [':not(.foo)', 10],
+            [':not([foo])', 10],
+            [':not(:empty)', 10],
+            [':not(#foo)', 100],
+            ['foo:empty', 11],
+            ['foo:before', 2],
+            ['foo::before', 2],
+            ['foo:empty::before', 12],
+            ['#lorem + foo#ipsum:first-child > bar:first-line', 213],
+        ];
     }
 
     public function getParseSeriesTestData()
     {
-        return array(
-            array('1n+3', 1, 3),
-            array('1n +3', 1, 3),
-            array('1n + 3', 1, 3),
-            array('1n+ 3', 1, 3),
-            array('1n-3', 1, -3),
-            array('1n -3', 1, -3),
-            array('1n - 3', 1, -3),
-            array('1n- 3', 1, -3),
-            array('n-5', 1, -5),
-            array('odd', 2, 1),
-            array('even', 2, 0),
-            array('3n', 3, 0),
-            array('n', 1, 0),
-            array('+n', 1, 0),
-            array('-n', -1, 0),
-            array('5', 0, 5),
-        );
+        return [
+            ['1n+3', 1, 3],
+            ['1n +3', 1, 3],
+            ['1n + 3', 1, 3],
+            ['1n+ 3', 1, 3],
+            ['1n-3', 1, -3],
+            ['1n -3', 1, -3],
+            ['1n - 3', 1, -3],
+            ['1n- 3', 1, -3],
+            ['n-5', 1, -5],
+            ['odd', 2, 1],
+            ['even', 2, 0],
+            ['3n', 3, 0],
+            ['n', 1, 0],
+            ['+n', 1, 0],
+            ['-n', -1, 0],
+            ['5', 0, 5],
+        ];
     }
 
     public function getParseSeriesExceptionTestData()
     {
-        return array(
-            array('foo'),
-            array('n+'),
-        );
+        return [
+            ['foo'],
+            ['n+'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
index 21eb608462..ff9ea90975 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/ReaderTest.php
@@ -70,11 +70,11 @@ class ReaderTest extends TestCase
         $reader = new Reader('hello');
 
         $this->assertFalse($reader->findPattern('/world/'));
-        $this->assertEquals(array('hello', 'h'), $reader->findPattern('/^([a-z]).*/'));
+        $this->assertEquals(['hello', 'h'], $reader->findPattern('/^([a-z]).*/'));
 
         $this->assignPosition($reader, 2);
         $this->assertFalse($reader->findPattern('/^h.*/'));
-        $this->assertEquals(array('llo'), $reader->findPattern('/^llo$/'));
+        $this->assertEquals(['llo'], $reader->findPattern('/^llo$/'));
     }
 
     public function testMoveForward()
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
index 7e92f5baee..29d9d5f16b 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ClassParserTest.php
@@ -34,12 +34,12 @@ class ClassParserTest extends TestCase
 
     public function getParseTestData()
     {
-        return array(
-            array('.testclass', 'Class[Element[*].testclass]'),
-            array('testel.testclass', 'Class[Element[testel].testclass]'),
-            array('testns|.testclass', 'Class[Element[testns|*].testclass]'),
-            array('testns|*.testclass', 'Class[Element[testns|*].testclass]'),
-            array('testns|testel.testclass', 'Class[Element[testns|testel].testclass]'),
-        );
+        return [
+            ['.testclass', 'Class[Element[*].testclass]'],
+            ['testel.testclass', 'Class[Element[testel].testclass]'],
+            ['testns|.testclass', 'Class[Element[testns|*].testclass]'],
+            ['testns|*.testclass', 'Class[Element[testns|*].testclass]'],
+            ['testns|testel.testclass', 'Class[Element[testns|testel].testclass]'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
index 05a730fde1..79cc227032 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/ElementParserTest.php
@@ -34,11 +34,11 @@ class ElementParserTest extends TestCase
 
     public function getParseTestData()
     {
-        return array(
-            array('*', 'Element[*]'),
-            array('testel', 'Element[testel]'),
-            array('testns|*', 'Element[testns|*]'),
-            array('testns|testel', 'Element[testns|testel]'),
-        );
+        return [
+            ['*', 'Element[*]'],
+            ['testel', 'Element[testel]'],
+            ['testns|*', 'Element[testns|*]'],
+            ['testns|testel', 'Element[testns|testel]'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
index 82f555d9ab..a7c79d69a5 100644
--- a/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/Parser/Shortcut/HashParserTest.php
@@ -34,12 +34,12 @@ class HashParserTest extends TestCase
 
     public function getParseTestData()
     {
-        return array(
-            array('#testid', 'Hash[Element[*]#testid]'),
-            array('testel#testid', 'Hash[Element[testel]#testid]'),
-            array('testns|#testid', 'Hash[Element[testns|*]#testid]'),
-            array('testns|*#testid', 'Hash[Element[testns|*]#testid]'),
-            array('testns|testel#testid', 'Hash[Element[testns|testel]#testid]'),
-        );
+        return [
+            ['#testid', 'Hash[Element[*]#testid]'],
+            ['testel#testid', 'Hash[Element[testel]#testid]'],
+            ['testns|#testid', 'Hash[Element[testns|*]#testid]'],
+            ['testns|*#testid', 'Hash[Element[testns|*]#testid]'],
+            ['testns|testel#testid', 'Hash[Element[testns|testel]#testid]'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
index 92957df5f1..a9ab29e2ad 100644
--- a/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
+++ b/src/Symfony/Component/CssSelector/Tests/XPath/TranslatorTest.php
@@ -151,248 +151,248 @@ class TranslatorTest extends TestCase
 
     public function getXpathLiteralTestData()
     {
-        return array(
-            array('foo', "'foo'"),
-            array("foo's bar", '"foo\'s bar"'),
-            array("foo's \"middle\" bar", 'concat(\'foo\', "\'", \'s "middle" bar\')'),
-            array("foo's 'middle' \"bar\"", 'concat(\'foo\', "\'", \'s \', "\'", \'middle\', "\'", \' "bar"\')'),
-        );
+        return [
+            ['foo', "'foo'"],
+            ["foo's bar", '"foo\'s bar"'],
+            ["foo's \"middle\" bar", 'concat(\'foo\', "\'", \'s "middle" bar\')'],
+            ["foo's 'middle' \"bar\"", 'concat(\'foo\', "\'", \'s \', "\'", \'middle\', "\'", \' "bar"\')'],
+        ];
     }
 
     public function getCssToXPathTestData()
     {
-        return array(
-            array('*', '*'),
-            array('e', 'e'),
-            array('*|e', 'e'),
-            array('e|f', 'e:f'),
-            array('e[foo]', 'e[@foo]'),
-            array('e[foo|bar]', 'e[@foo:bar]'),
-            array('e[foo="bar"]', "e[@foo = 'bar']"),
-            array('e[foo~="bar"]', "e[@foo and contains(concat(' ', normalize-space(@foo), ' '), ' bar ')]"),
-            array('e[foo^="bar"]', "e[@foo and starts-with(@foo, 'bar')]"),
-            array('e[foo$="bar"]', "e[@foo and substring(@foo, string-length(@foo)-2) = 'bar']"),
-            array('e[foo*="bar"]', "e[@foo and contains(@foo, 'bar')]"),
-            array('e[foo!="bar"]', "e[not(@foo) or @foo != 'bar']"),
-            array('e[foo!="bar"][foo!="baz"]', "e[(not(@foo) or @foo != 'bar') and (not(@foo) or @foo != 'baz')]"),
-            array('e[hreflang|="en"]', "e[@hreflang and (@hreflang = 'en' or starts-with(@hreflang, 'en-'))]"),
-            array('e:nth-child(1)', "*/*[(name() = 'e') and (position() = 1)]"),
-            array('e:nth-last-child(1)', "*/*[(name() = 'e') and (position() = last() - 0)]"),
-            array('e:nth-last-child(2n+2)', "*/*[(name() = 'e') and (last() - position() - 1 >= 0 and (last() - position() - 1) mod 2 = 0)]"),
-            array('e:nth-of-type(1)', '*/e[position() = 1]'),
-            array('e:nth-last-of-type(1)', '*/e[position() = last() - 0]'),
-            array('div e:nth-last-of-type(1) .aclass', "div/descendant-or-self::*/e[position() = last() - 0]/descendant-or-self::*/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' aclass ')]"),
-            array('e:first-child', "*/*[(name() = 'e') and (position() = 1)]"),
-            array('e:last-child', "*/*[(name() = 'e') and (position() = last())]"),
-            array('e:first-of-type', '*/e[position() = 1]'),
-            array('e:last-of-type', '*/e[position() = last()]'),
-            array('e:only-child', "*/*[(name() = 'e') and (last() = 1)]"),
-            array('e:only-of-type', 'e[last() = 1]'),
-            array('e:empty', 'e[not(*) and not(string-length())]'),
-            array('e:EmPTY', 'e[not(*) and not(string-length())]'),
-            array('e:root', 'e[not(parent::*)]'),
-            array('e:hover', 'e[0]'),
-            array('e:contains("foo")', "e[contains(string(.), 'foo')]"),
-            array('e:ConTains(foo)', "e[contains(string(.), 'foo')]"),
-            array('e.warning', "e[@class and contains(concat(' ', normalize-space(@class), ' '), ' warning ')]"),
-            array('e#myid', "e[@id = 'myid']"),
-            array('e:not(:nth-child(odd))', 'e[not(position() - 1 >= 0 and (position() - 1) mod 2 = 0)]'),
-            array('e:nOT(*)', 'e[0]'),
-            array('e f', 'e/descendant-or-self::*/f'),
-            array('e > f', 'e/f'),
-            array('e + f', "e/following-sibling::*[(name() = 'f') and (position() = 1)]"),
-            array('e ~ f', 'e/following-sibling::f'),
-            array('div#container p', "div[@id = 'container']/descendant-or-self::*/p"),
-        );
+        return [
+            ['*', '*'],
+            ['e', 'e'],
+            ['*|e', 'e'],
+            ['e|f', 'e:f'],
+            ['e[foo]', 'e[@foo]'],
+            ['e[foo|bar]', 'e[@foo:bar]'],
+            ['e[foo="bar"]', "e[@foo = 'bar']"],
+            ['e[foo~="bar"]', "e[@foo and contains(concat(' ', normalize-space(@foo), ' '), ' bar ')]"],
+            ['e[foo^="bar"]', "e[@foo and starts-with(@foo, 'bar')]"],
+            ['e[foo$="bar"]', "e[@foo and substring(@foo, string-length(@foo)-2) = 'bar']"],
+            ['e[foo*="bar"]', "e[@foo and contains(@foo, 'bar')]"],
+            ['e[foo!="bar"]', "e[not(@foo) or @foo != 'bar']"],
+            ['e[foo!="bar"][foo!="baz"]', "e[(not(@foo) or @foo != 'bar') and (not(@foo) or @foo != 'baz')]"],
+            ['e[hreflang|="en"]', "e[@hreflang and (@hreflang = 'en' or starts-with(@hreflang, 'en-'))]"],
+            ['e:nth-child(1)', "*/*[(name() = 'e') and (position() = 1)]"],
+            ['e:nth-last-child(1)', "*/*[(name() = 'e') and (position() = last() - 0)]"],
+            ['e:nth-last-child(2n+2)', "*/*[(name() = 'e') and (last() - position() - 1 >= 0 and (last() - position() - 1) mod 2 = 0)]"],
+            ['e:nth-of-type(1)', '*/e[position() = 1]'],
+            ['e:nth-last-of-type(1)', '*/e[position() = last() - 0]'],
+            ['div e:nth-last-of-type(1) .aclass', "div/descendant-or-self::*/e[position() = last() - 0]/descendant-or-self::*/*[@class and contains(concat(' ', normalize-space(@class), ' '), ' aclass ')]"],
+            ['e:first-child', "*/*[(name() = 'e') and (position() = 1)]"],
+            ['e:last-child', "*/*[(name() = 'e') and (position() = last())]"],
+            ['e:first-of-type', '*/e[position() = 1]'],
+            ['e:last-of-type', '*/e[position() = last()]'],
+            ['e:only-child', "*/*[(name() = 'e') and (last() = 1)]"],
+            ['e:only-of-type', 'e[last() = 1]'],
+            ['e:empty', 'e[not(*) and not(string-length())]'],
+            ['e:EmPTY', 'e[not(*) and not(string-length())]'],
+            ['e:root', 'e[not(parent::*)]'],
+            ['e:hover', 'e[0]'],
+            ['e:contains("foo")', "e[contains(string(.), 'foo')]"],
+            ['e:ConTains(foo)', "e[contains(string(.), 'foo')]"],
+            ['e.warning', "e[@class and contains(concat(' ', normalize-space(@class), ' '), ' warning ')]"],
+            ['e#myid', "e[@id = 'myid']"],
+            ['e:not(:nth-child(odd))', 'e[not(position() - 1 >= 0 and (position() - 1) mod 2 = 0)]'],
+            ['e:nOT(*)', 'e[0]'],
+            ['e f', 'e/descendant-or-self::*/f'],
+            ['e > f', 'e/f'],
+            ['e + f', "e/following-sibling::*[(name() = 'f') and (position() = 1)]"],
+            ['e ~ f', 'e/following-sibling::f'],
+            ['div#container p', "div[@id = 'container']/descendant-or-self::*/p"],
+        ];
     }
 
     public function getXmlLangTestData()
     {
-        return array(
-            array(':lang("EN")', array('first', 'second', 'third', 'fourth')),
-            array(':lang("en-us")', array('second', 'fourth')),
-            array(':lang(en-nz)', array('third')),
-            array(':lang(fr)', array('fifth')),
-            array(':lang(ru)', array('sixth')),
-            array(":lang('ZH')", array('eighth')),
-            array(':lang(de) :lang(zh)', array('eighth')),
-            array(':lang(en), :lang(zh)', array('first', 'second', 'third', 'fourth', 'eighth')),
-            array(':lang(es)', array()),
-        );
+        return [
+            [':lang("EN")', ['first', 'second', 'third', 'fourth']],
+            [':lang("en-us")', ['second', 'fourth']],
+            [':lang(en-nz)', ['third']],
+            [':lang(fr)', ['fifth']],
+            [':lang(ru)', ['sixth']],
+            [":lang('ZH')", ['eighth']],
+            [':lang(de) :lang(zh)', ['eighth']],
+            [':lang(en), :lang(zh)', ['first', 'second', 'third', 'fourth', 'eighth']],
+            [':lang(es)', []],
+        ];
     }
 
     public function getHtmlIdsTestData()
     {
-        return array(
-            array('div', array('outer-div', 'li-div', 'foobar-div')),
-            array('DIV', array('outer-div', 'li-div', 'foobar-div')),  // case-insensitive in HTML
-            array('div div', array('li-div')),
-            array('div, div div', array('outer-div', 'li-div', 'foobar-div')),
-            array('a[name]', array('name-anchor')),
-            array('a[NAme]', array('name-anchor')), // case-insensitive in HTML:
-            array('a[rel]', array('tag-anchor', 'nofollow-anchor')),
-            array('a[rel="tag"]', array('tag-anchor')),
-            array('a[href*="localhost"]', array('tag-anchor')),
-            array('a[href*=""]', array()),
-            array('a[href^="http"]', array('tag-anchor', 'nofollow-anchor')),
-            array('a[href^="http:"]', array('tag-anchor')),
-            array('a[href^=""]', array()),
-            array('a[href$="org"]', array('nofollow-anchor')),
-            array('a[href$=""]', array()),
-            array('div[foobar~="bc"]', array('foobar-div')),
-            array('div[foobar~="cde"]', array('foobar-div')),
-            array('[foobar~="ab bc"]', array('foobar-div')),
-            array('[foobar~=""]', array()),
-            array('[foobar~=" \t"]', array()),
-            array('div[foobar~="cd"]', array()),
-            array('*[lang|="En"]', array('second-li')),
-            array('[lang|="En-us"]', array('second-li')),
+        return [
+            ['div', ['outer-div', 'li-div', 'foobar-div']],
+            ['DIV', ['outer-div', 'li-div', 'foobar-div']],  // case-insensitive in HTML
+            ['div div', ['li-div']],
+            ['div, div div', ['outer-div', 'li-div', 'foobar-div']],
+            ['a[name]', ['name-anchor']],
+            ['a[NAme]', ['name-anchor']], // case-insensitive in HTML:
+            ['a[rel]', ['tag-anchor', 'nofollow-anchor']],
+            ['a[rel="tag"]', ['tag-anchor']],
+            ['a[href*="localhost"]', ['tag-anchor']],
+            ['a[href*=""]', []],
+            ['a[href^="http"]', ['tag-anchor', 'nofollow-anchor']],
+            ['a[href^="http:"]', ['tag-anchor']],
+            ['a[href^=""]', []],
+            ['a[href$="org"]', ['nofollow-anchor']],
+            ['a[href$=""]', []],
+            ['div[foobar~="bc"]', ['foobar-div']],
+            ['div[foobar~="cde"]', ['foobar-div']],
+            ['[foobar~="ab bc"]', ['foobar-div']],
+            ['[foobar~=""]', []],
+            ['[foobar~=" \t"]', []],
+            ['div[foobar~="cd"]', []],
+            ['*[lang|="En"]', ['second-li']],
+            ['[lang|="En-us"]', ['second-li']],
             // Attribute values are case sensitive
-            array('*[lang|="en"]', array()),
-            array('[lang|="en-US"]', array()),
-            array('*[lang|="e"]', array()),
+            ['*[lang|="en"]', []],
+            ['[lang|="en-US"]', []],
+            ['*[lang|="e"]', []],
             // ... :lang() is not.
-            array(':lang("EN")', array('second-li', 'li-div')),
-            array('*:lang(en-US)', array('second-li', 'li-div')),
-            array(':lang("e")', array()),
-            array('li:nth-child(3)', array('third-li')),
-            array('li:nth-child(10)', array()),
-            array('li:nth-child(2n)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-child(even)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-child(2n+0)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-child(+2n+1)', array('first-li', 'third-li', 'fifth-li', 'seventh-li')),
-            array('li:nth-child(odd)', array('first-li', 'third-li', 'fifth-li', 'seventh-li')),
-            array('li:nth-child(2n+4)', array('fourth-li', 'sixth-li')),
-            array('li:nth-child(3n+1)', array('first-li', 'fourth-li', 'seventh-li')),
-            array('li:nth-child(n)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-child(n-1)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-child(n+1)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-child(n+3)', array('third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-child(-n)', array()),
-            array('li:nth-child(-n-1)', array()),
-            array('li:nth-child(-n+1)', array('first-li')),
-            array('li:nth-child(-n+3)', array('first-li', 'second-li', 'third-li')),
-            array('li:nth-last-child(0)', array()),
-            array('li:nth-last-child(2n)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-last-child(even)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-last-child(2n+2)', array('second-li', 'fourth-li', 'sixth-li')),
-            array('li:nth-last-child(n)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-last-child(n-1)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-last-child(n-3)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-last-child(n+1)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li')),
-            array('li:nth-last-child(n+3)', array('first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li')),
-            array('li:nth-last-child(-n)', array()),
-            array('li:nth-last-child(-n-1)', array()),
-            array('li:nth-last-child(-n+1)', array('seventh-li')),
-            array('li:nth-last-child(-n+3)', array('fifth-li', 'sixth-li', 'seventh-li')),
-            array('ol:first-of-type', array('first-ol')),
-            array('ol:nth-child(1)', array('first-ol')),
-            array('ol:nth-of-type(2)', array('second-ol')),
-            array('ol:nth-last-of-type(1)', array('second-ol')),
-            array('span:only-child', array('foobar-span')),
-            array('li div:only-child', array('li-div')),
-            array('div *:only-child', array('li-div', 'foobar-span')),
-            array('p:only-of-type', array('paragraph')),
-            array('a:empty', array('name-anchor')),
-            array('a:EMpty', array('name-anchor')),
-            array('li:empty', array('third-li', 'fourth-li', 'fifth-li', 'sixth-li')),
-            array(':root', array('html')),
-            array('html:root', array('html')),
-            array('li:root', array()),
-            array('* :root', array()),
-            array('*:contains("link")', array('html', 'outer-div', 'tag-anchor', 'nofollow-anchor')),
-            array(':CONtains("link")', array('html', 'outer-div', 'tag-anchor', 'nofollow-anchor')),
-            array('*:contains("LInk")', array()),  // case sensitive
-            array('*:contains("e")', array('html', 'nil', 'outer-div', 'first-ol', 'first-li', 'paragraph', 'p-em')),
-            array('*:contains("E")', array()),  // case-sensitive
-            array('.a', array('first-ol')),
-            array('.b', array('first-ol')),
-            array('*.a', array('first-ol')),
-            array('ol.a', array('first-ol')),
-            array('.c', array('first-ol', 'third-li', 'fourth-li')),
-            array('*.c', array('first-ol', 'third-li', 'fourth-li')),
-            array('ol *.c', array('third-li', 'fourth-li')),
-            array('ol li.c', array('third-li', 'fourth-li')),
-            array('li ~ li.c', array('third-li', 'fourth-li')),
-            array('ol > li.c', array('third-li', 'fourth-li')),
-            array('#first-li', array('first-li')),
-            array('li#first-li', array('first-li')),
-            array('*#first-li', array('first-li')),
-            array('li div', array('li-div')),
-            array('li > div', array('li-div')),
-            array('div div', array('li-div')),
-            array('div > div', array()),
-            array('div>.c', array('first-ol')),
-            array('div > .c', array('first-ol')),
-            array('div + div', array('foobar-div')),
-            array('a ~ a', array('tag-anchor', 'nofollow-anchor')),
-            array('a[rel="tag"] ~ a', array('nofollow-anchor')),
-            array('ol#first-ol li:last-child', array('seventh-li')),
-            array('ol#first-ol *:last-child', array('li-div', 'seventh-li')),
-            array('#outer-div:first-child', array('outer-div')),
-            array('#outer-div :first-child', array('name-anchor', 'first-li', 'li-div', 'p-b', 'checkbox-fieldset-disabled', 'area-href')),
-            array('a[href]', array('tag-anchor', 'nofollow-anchor')),
-            array(':not(*)', array()),
-            array('a:not([href])', array('name-anchor')),
-            array('ol :Not(li[class])', array('first-li', 'second-li', 'li-div', 'fifth-li', 'sixth-li', 'seventh-li')),
+            [':lang("EN")', ['second-li', 'li-div']],
+            ['*:lang(en-US)', ['second-li', 'li-div']],
+            [':lang("e")', []],
+            ['li:nth-child(3)', ['third-li']],
+            ['li:nth-child(10)', []],
+            ['li:nth-child(2n)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-child(even)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-child(2n+0)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-child(+2n+1)', ['first-li', 'third-li', 'fifth-li', 'seventh-li']],
+            ['li:nth-child(odd)', ['first-li', 'third-li', 'fifth-li', 'seventh-li']],
+            ['li:nth-child(2n+4)', ['fourth-li', 'sixth-li']],
+            ['li:nth-child(3n+1)', ['first-li', 'fourth-li', 'seventh-li']],
+            ['li:nth-child(n)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-child(n-1)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-child(n+1)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-child(n+3)', ['third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-child(-n)', []],
+            ['li:nth-child(-n-1)', []],
+            ['li:nth-child(-n+1)', ['first-li']],
+            ['li:nth-child(-n+3)', ['first-li', 'second-li', 'third-li']],
+            ['li:nth-last-child(0)', []],
+            ['li:nth-last-child(2n)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-last-child(even)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-last-child(2n+2)', ['second-li', 'fourth-li', 'sixth-li']],
+            ['li:nth-last-child(n)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-last-child(n-1)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-last-child(n-3)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-last-child(n+1)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']],
+            ['li:nth-last-child(n+3)', ['first-li', 'second-li', 'third-li', 'fourth-li', 'fifth-li']],
+            ['li:nth-last-child(-n)', []],
+            ['li:nth-last-child(-n-1)', []],
+            ['li:nth-last-child(-n+1)', ['seventh-li']],
+            ['li:nth-last-child(-n+3)', ['fifth-li', 'sixth-li', 'seventh-li']],
+            ['ol:first-of-type', ['first-ol']],
+            ['ol:nth-child(1)', ['first-ol']],
+            ['ol:nth-of-type(2)', ['second-ol']],
+            ['ol:nth-last-of-type(1)', ['second-ol']],
+            ['span:only-child', ['foobar-span']],
+            ['li div:only-child', ['li-div']],
+            ['div *:only-child', ['li-div', 'foobar-span']],
+            ['p:only-of-type', ['paragraph']],
+            ['a:empty', ['name-anchor']],
+            ['a:EMpty', ['name-anchor']],
+            ['li:empty', ['third-li', 'fourth-li', 'fifth-li', 'sixth-li']],
+            [':root', ['html']],
+            ['html:root', ['html']],
+            ['li:root', []],
+            ['* :root', []],
+            ['*:contains("link")', ['html', 'outer-div', 'tag-anchor', 'nofollow-anchor']],
+            [':CONtains("link")', ['html', 'outer-div', 'tag-anchor', 'nofollow-anchor']],
+            ['*:contains("LInk")', []],  // case sensitive
+            ['*:contains("e")', ['html', 'nil', 'outer-div', 'first-ol', 'first-li', 'paragraph', 'p-em']],
+            ['*:contains("E")', []],  // case-sensitive
+            ['.a', ['first-ol']],
+            ['.b', ['first-ol']],
+            ['*.a', ['first-ol']],
+            ['ol.a', ['first-ol']],
+            ['.c', ['first-ol', 'third-li', 'fourth-li']],
+            ['*.c', ['first-ol', 'third-li', 'fourth-li']],
+            ['ol *.c', ['third-li', 'fourth-li']],
+            ['ol li.c', ['third-li', 'fourth-li']],
+            ['li ~ li.c', ['third-li', 'fourth-li']],
+            ['ol > li.c', ['third-li', 'fourth-li']],
+            ['#first-li', ['first-li']],
+            ['li#first-li', ['first-li']],
+            ['*#first-li', ['first-li']],
+            ['li div', ['li-div']],
+            ['li > div', ['li-div']],
+            ['div div', ['li-div']],
+            ['div > div', []],
+            ['div>.c', ['first-ol']],
+            ['div > .c', ['first-ol']],
+            ['div + div', ['foobar-div']],
+            ['a ~ a', ['tag-anchor', 'nofollow-anchor']],
+            ['a[rel="tag"] ~ a', ['nofollow-anchor']],
+            ['ol#first-ol li:last-child', ['seventh-li']],
+            ['ol#first-ol *:last-child', ['li-div', 'seventh-li']],
+            ['#outer-div:first-child', ['outer-div']],
+            ['#outer-div :first-child', ['name-anchor', 'first-li', 'li-div', 'p-b', 'checkbox-fieldset-disabled', 'area-href']],
+            ['a[href]', ['tag-anchor', 'nofollow-anchor']],
+            [':not(*)', []],
+            ['a:not([href])', ['name-anchor']],
+            ['ol :Not(li[class])', ['first-li', 'second-li', 'li-div', 'fifth-li', 'sixth-li', 'seventh-li']],
             // HTML-specific
-            array(':link', array('link-href', 'tag-anchor', 'nofollow-anchor', 'area-href')),
-            array(':visited', array()),
-            array(':enabled', array('link-href', 'tag-anchor', 'nofollow-anchor', 'checkbox-unchecked', 'text-checked', 'checkbox-checked', 'area-href')),
-            array(':disabled', array('checkbox-disabled', 'checkbox-disabled-checked', 'fieldset', 'checkbox-fieldset-disabled')),
-            array(':checked', array('checkbox-checked', 'checkbox-disabled-checked')),
-        );
+            [':link', ['link-href', 'tag-anchor', 'nofollow-anchor', 'area-href']],
+            [':visited', []],
+            [':enabled', ['link-href', 'tag-anchor', 'nofollow-anchor', 'checkbox-unchecked', 'text-checked', 'checkbox-checked', 'area-href']],
+            [':disabled', ['checkbox-disabled', 'checkbox-disabled-checked', 'fieldset', 'checkbox-fieldset-disabled']],
+            [':checked', ['checkbox-checked', 'checkbox-disabled-checked']],
+        ];
     }
 
     public function getHtmlShakespearTestData()
     {
-        return array(
-            array('*', 246),
-            array('div:contains(CELIA)', 26),
-            array('div:only-child', 22), // ?
-            array('div:nth-child(even)', 106),
-            array('div:nth-child(2n)', 106),
-            array('div:nth-child(odd)', 137),
-            array('div:nth-child(2n+1)', 137),
-            array('div:nth-child(n)', 243),
-            array('div:last-child', 53),
-            array('div:first-child', 51),
-            array('div > div', 242),
-            array('div + div', 190),
-            array('div ~ div', 190),
-            array('body', 1),
-            array('body div', 243),
-            array('div', 243),
-            array('div div', 242),
-            array('div div div', 241),
-            array('div, div, div', 243),
-            array('div, a, span', 243),
-            array('.dialog', 51),
-            array('div.dialog', 51),
-            array('div .dialog', 51),
-            array('div.character, div.dialog', 99),
-            array('div.direction.dialog', 0),
-            array('div.dialog.direction', 0),
-            array('div.dialog.scene', 1),
-            array('div.scene.scene', 1),
-            array('div.scene .scene', 0),
-            array('div.direction .dialog ', 0),
-            array('div .dialog .direction', 4),
-            array('div.dialog .dialog .direction', 4),
-            array('#speech5', 1),
-            array('div#speech5', 1),
-            array('div #speech5', 1),
-            array('div.scene div.dialog', 49),
-            array('div#scene1 div.dialog div', 142),
-            array('#scene1 #speech1', 1),
-            array('div[class]', 103),
-            array('div[class=dialog]', 50),
-            array('div[class^=dia]', 51),
-            array('div[class$=log]', 50),
-            array('div[class*=sce]', 1),
-            array('div[class|=dialog]', 50), // ? Seems right
-            array('div[class!=madeup]', 243), // ? Seems right
-            array('div[class~=dialog]', 51), // ? Seems right
-        );
+        return [
+            ['*', 246],
+            ['div:contains(CELIA)', 26],
+            ['div:only-child', 22], // ?
+            ['div:nth-child(even)', 106],
+            ['div:nth-child(2n)', 106],
+            ['div:nth-child(odd)', 137],
+            ['div:nth-child(2n+1)', 137],
+            ['div:nth-child(n)', 243],
+            ['div:last-child', 53],
+            ['div:first-child', 51],
+            ['div > div', 242],
+            ['div + div', 190],
+            ['div ~ div', 190],
+            ['body', 1],
+            ['body div', 243],
+            ['div', 243],
+            ['div div', 242],
+            ['div div div', 241],
+            ['div, div, div', 243],
+            ['div, a, span', 243],
+            ['.dialog', 51],
+            ['div.dialog', 51],
+            ['div .dialog', 51],
+            ['div.character, div.dialog', 99],
+            ['div.direction.dialog', 0],
+            ['div.dialog.direction', 0],
+            ['div.dialog.scene', 1],
+            ['div.scene.scene', 1],
+            ['div.scene .scene', 0],
+            ['div.direction .dialog ', 0],
+            ['div .dialog .direction', 4],
+            ['div.dialog .dialog .direction', 4],
+            ['#speech5', 1],
+            ['div#speech5', 1],
+            ['div #speech5', 1],
+            ['div.scene div.dialog', 49],
+            ['div#scene1 div.dialog div', 142],
+            ['#scene1 #speech1', 1],
+            ['div[class]', 103],
+            ['div[class=dialog]', 50],
+            ['div[class^=dia]', 51],
+            ['div[class$=log]', 50],
+            ['div[class*=sce]', 1],
+            ['div[class|=dialog]', 50], // ? Seems right
+            ['div[class!=madeup]', 243], // ? Seems right
+            ['div[class~=dialog]', 51], // ? Seems right
+        ];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/AbstractExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/AbstractExtension.php
index 026ac06c79..1dce1eddff 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/AbstractExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/AbstractExtension.php
@@ -28,7 +28,7 @@ abstract class AbstractExtension implements ExtensionInterface
      */
     public function getNodeTranslators()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -36,7 +36,7 @@ abstract class AbstractExtension implements ExtensionInterface
      */
     public function getCombinationTranslators()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -44,7 +44,7 @@ abstract class AbstractExtension implements ExtensionInterface
      */
     public function getFunctionTranslators()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -52,7 +52,7 @@ abstract class AbstractExtension implements ExtensionInterface
      */
     public function getPseudoClassTranslators()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -60,6 +60,6 @@ abstract class AbstractExtension implements ExtensionInterface
      */
     public function getAttributeMatchingTranslators()
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
index 8a4d884212..e636ea3deb 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/AttributeMatchingExtension.php
@@ -31,16 +31,16 @@ class AttributeMatchingExtension extends AbstractExtension
      */
     public function getAttributeMatchingTranslators()
     {
-        return array(
-            'exists' => array($this, 'translateExists'),
-            '=' => array($this, 'translateEquals'),
-            '~=' => array($this, 'translateIncludes'),
-            '|=' => array($this, 'translateDashMatch'),
-            '^=' => array($this, 'translatePrefixMatch'),
-            '$=' => array($this, 'translateSuffixMatch'),
-            '*=' => array($this, 'translateSubstringMatch'),
-            '!=' => array($this, 'translateDifferent'),
-        );
+        return [
+            'exists' => [$this, 'translateExists'],
+            '=' => [$this, 'translateEquals'],
+            '~=' => [$this, 'translateIncludes'],
+            '|=' => [$this, 'translateDashMatch'],
+            '^=' => [$this, 'translatePrefixMatch'],
+            '$=' => [$this, 'translateSuffixMatch'],
+            '*=' => [$this, 'translateSubstringMatch'],
+            '!=' => [$this, 'translateDifferent'],
+        ];
     }
 
     public function translateExists(XPathExpr $xpath, string $attribute, ?string $value): XPathExpr
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/CombinationExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/CombinationExtension.php
index 85181fd93e..6a0f4165c6 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/CombinationExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/CombinationExtension.php
@@ -30,12 +30,12 @@ class CombinationExtension extends AbstractExtension
      */
     public function getCombinationTranslators(): array
     {
-        return array(
-            ' ' => array($this, 'translateDescendant'),
-            '>' => array($this, 'translateChild'),
-            '+' => array($this, 'translateDirectAdjacent'),
-            '~' => array($this, 'translateIndirectAdjacent'),
-        );
+        return [
+            ' ' => [$this, 'translateDescendant'],
+            '>' => [$this, 'translateChild'],
+            '+' => [$this, 'translateDirectAdjacent'],
+            '~' => [$this, 'translateIndirectAdjacent'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/FunctionExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/FunctionExtension.php
index ebe508fefd..5d032df1d4 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/FunctionExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/FunctionExtension.php
@@ -35,14 +35,14 @@ class FunctionExtension extends AbstractExtension
      */
     public function getFunctionTranslators()
     {
-        return array(
-            'nth-child' => array($this, 'translateNthChild'),
-            'nth-last-child' => array($this, 'translateNthLastChild'),
-            'nth-of-type' => array($this, 'translateNthOfType'),
-            'nth-last-of-type' => array($this, 'translateNthLastOfType'),
-            'contains' => array($this, 'translateContains'),
-            'lang' => array($this, 'translateLang'),
-        );
+        return [
+            'nth-child' => [$this, 'translateNthChild'],
+            'nth-last-child' => [$this, 'translateNthLastChild'],
+            'nth-of-type' => [$this, 'translateNthOfType'],
+            'nth-last-of-type' => [$this, 'translateNthLastOfType'],
+            'contains' => [$this, 'translateContains'],
+            'lang' => [$this, 'translateLang'],
+        ];
     }
 
     /**
@@ -86,7 +86,7 @@ class FunctionExtension extends AbstractExtension
             $expr .= ' - '.$b;
         }
 
-        $conditions = array(sprintf('%s %s 0', $expr, $sign));
+        $conditions = [sprintf('%s %s 0', $expr, $sign)];
 
         if (1 !== $a && -1 !== $a) {
             $conditions[] = sprintf('(%s) mod %d = 0', $expr, $a);
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/HtmlExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/HtmlExtension.php
index cd8e0d5fd8..99c1166c01 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/HtmlExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/HtmlExtension.php
@@ -41,16 +41,16 @@ class HtmlExtension extends AbstractExtension
      */
     public function getPseudoClassTranslators()
     {
-        return array(
-            'checked' => array($this, 'translateChecked'),
-            'link' => array($this, 'translateLink'),
-            'disabled' => array($this, 'translateDisabled'),
-            'enabled' => array($this, 'translateEnabled'),
-            'selected' => array($this, 'translateSelected'),
-            'invalid' => array($this, 'translateInvalid'),
-            'hover' => array($this, 'translateHover'),
-            'visited' => array($this, 'translateVisited'),
-        );
+        return [
+            'checked' => [$this, 'translateChecked'],
+            'link' => [$this, 'translateLink'],
+            'disabled' => [$this, 'translateDisabled'],
+            'enabled' => [$this, 'translateEnabled'],
+            'selected' => [$this, 'translateSelected'],
+            'invalid' => [$this, 'translateInvalid'],
+            'hover' => [$this, 'translateHover'],
+            'visited' => [$this, 'translateVisited'],
+        ];
     }
 
     /**
@@ -58,9 +58,9 @@ class HtmlExtension extends AbstractExtension
      */
     public function getFunctionTranslators()
     {
-        return array(
-            'lang' => array($this, 'translateLang'),
-        );
+        return [
+            'lang' => [$this, 'translateLang'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php
index 61442b6f7a..4d86cb876b 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/NodeExtension.php
@@ -64,17 +64,17 @@ class NodeExtension extends AbstractExtension
      */
     public function getNodeTranslators()
     {
-        return array(
-            'Selector' => array($this, 'translateSelector'),
-            'CombinedSelector' => array($this, 'translateCombinedSelector'),
-            'Negation' => array($this, 'translateNegation'),
-            'Function' => array($this, 'translateFunction'),
-            'Pseudo' => array($this, 'translatePseudo'),
-            'Attribute' => array($this, 'translateAttribute'),
-            'Class' => array($this, 'translateClass'),
-            'Hash' => array($this, 'translateHash'),
-            'Element' => array($this, 'translateElement'),
-        );
+        return [
+            'Selector' => [$this, 'translateSelector'],
+            'CombinedSelector' => [$this, 'translateCombinedSelector'],
+            'Negation' => [$this, 'translateNegation'],
+            'Function' => [$this, 'translateFunction'],
+            'Pseudo' => [$this, 'translatePseudo'],
+            'Attribute' => [$this, 'translateAttribute'],
+            'Class' => [$this, 'translateClass'],
+            'Hash' => [$this, 'translateHash'],
+            'Element' => [$this, 'translateElement'],
+        ];
     }
 
     public function translateSelector(Node\SelectorNode $node, Translator $translator): XPathExpr
diff --git a/src/Symfony/Component/CssSelector/XPath/Extension/PseudoClassExtension.php b/src/Symfony/Component/CssSelector/XPath/Extension/PseudoClassExtension.php
index 378dfb7de1..27fe47f9a5 100644
--- a/src/Symfony/Component/CssSelector/XPath/Extension/PseudoClassExtension.php
+++ b/src/Symfony/Component/CssSelector/XPath/Extension/PseudoClassExtension.php
@@ -31,16 +31,16 @@ class PseudoClassExtension extends AbstractExtension
      */
     public function getPseudoClassTranslators()
     {
-        return array(
-            'root' => array($this, 'translateRoot'),
-            'first-child' => array($this, 'translateFirstChild'),
-            'last-child' => array($this, 'translateLastChild'),
-            'first-of-type' => array($this, 'translateFirstOfType'),
-            'last-of-type' => array($this, 'translateLastOfType'),
-            'only-child' => array($this, 'translateOnlyChild'),
-            'only-of-type' => array($this, 'translateOnlyOfType'),
-            'empty' => array($this, 'translateEmpty'),
-        );
+        return [
+            'root' => [$this, 'translateRoot'],
+            'first-child' => [$this, 'translateFirstChild'],
+            'last-child' => [$this, 'translateLastChild'],
+            'first-of-type' => [$this, 'translateFirstOfType'],
+            'last-of-type' => [$this, 'translateLastOfType'],
+            'only-child' => [$this, 'translateOnlyChild'],
+            'only-of-type' => [$this, 'translateOnlyOfType'],
+            'empty' => [$this, 'translateEmpty'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/CssSelector/XPath/Translator.php b/src/Symfony/Component/CssSelector/XPath/Translator.php
index 6426aeaba5..5a568dadee 100644
--- a/src/Symfony/Component/CssSelector/XPath/Translator.php
+++ b/src/Symfony/Component/CssSelector/XPath/Translator.php
@@ -35,18 +35,18 @@ class Translator implements TranslatorInterface
     /**
      * @var ParserInterface[]
      */
-    private $shortcutParsers = array();
+    private $shortcutParsers = [];
 
     /**
      * @var Extension\ExtensionInterface[]
      */
-    private $extensions = array();
+    private $extensions = [];
 
-    private $nodeTranslators = array();
-    private $combinationTranslators = array();
-    private $functionTranslators = array();
-    private $pseudoClassTranslators = array();
-    private $attributeMatchingTranslators = array();
+    private $nodeTranslators = [];
+    private $combinationTranslators = [];
+    private $functionTranslators = [];
+    private $pseudoClassTranslators = [];
+    private $attributeMatchingTranslators = [];
 
     public function __construct(ParserInterface $parser = null)
     {
@@ -72,7 +72,7 @@ class Translator implements TranslatorInterface
         }
 
         $string = $element;
-        $parts = array();
+        $parts = [];
         while (true) {
             if (false !== $pos = strpos($string, "'")) {
                 $parts[] = sprintf("'%s'", substr($string, 0, $pos));
diff --git a/src/Symfony/Component/Debug/BufferingLogger.php b/src/Symfony/Component/Debug/BufferingLogger.php
index a2ed75b9dc..e7db3a4ce4 100644
--- a/src/Symfony/Component/Debug/BufferingLogger.php
+++ b/src/Symfony/Component/Debug/BufferingLogger.php
@@ -20,17 +20,17 @@ use Psr\Log\AbstractLogger;
  */
 class BufferingLogger extends AbstractLogger
 {
-    private $logs = array();
+    private $logs = [];
 
-    public function log($level, $message, array $context = array())
+    public function log($level, $message, array $context = [])
     {
-        $this->logs[] = array($level, $message, $context);
+        $this->logs[] = [$level, $message, $context];
     }
 
     public function cleanLogs()
     {
         $logs = $this->logs;
-        $this->logs = array();
+        $this->logs = [];
 
         return $logs;
     }
diff --git a/src/Symfony/Component/Debug/Debug.php b/src/Symfony/Component/Debug/Debug.php
index a31d71e6aa..5d2d55cf9f 100644
--- a/src/Symfony/Component/Debug/Debug.php
+++ b/src/Symfony/Component/Debug/Debug.php
@@ -42,7 +42,7 @@ class Debug
             error_reporting(E_ALL);
         }
 
-        if (!\in_array(\PHP_SAPI, array('cli', 'phpdbg'), true)) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
             ini_set('display_errors', 0);
             ExceptionHandler::register();
         } elseif ($displayErrors && (!filter_var(ini_get('log_errors'), FILTER_VALIDATE_BOOLEAN) || ini_get('error_log'))) {
diff --git a/src/Symfony/Component/Debug/ErrorHandler.php b/src/Symfony/Component/Debug/ErrorHandler.php
index fec4bf03ba..da00e6861d 100644
--- a/src/Symfony/Component/Debug/ErrorHandler.php
+++ b/src/Symfony/Component/Debug/ErrorHandler.php
@@ -50,7 +50,7 @@ use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
  */
 class ErrorHandler
 {
-    private $levels = array(
+    private $levels = [
         E_DEPRECATED => 'Deprecated',
         E_USER_DEPRECATED => 'User Deprecated',
         E_NOTICE => 'Notice',
@@ -66,25 +66,25 @@ class ErrorHandler
         E_PARSE => 'Parse Error',
         E_ERROR => 'Error',
         E_CORE_ERROR => 'Core Error',
-    );
+    ];
 
-    private $loggers = array(
-        E_DEPRECATED => array(null, LogLevel::INFO),
-        E_USER_DEPRECATED => array(null, LogLevel::INFO),
-        E_NOTICE => array(null, LogLevel::WARNING),
-        E_USER_NOTICE => array(null, LogLevel::WARNING),
-        E_STRICT => array(null, LogLevel::WARNING),
-        E_WARNING => array(null, LogLevel::WARNING),
-        E_USER_WARNING => array(null, LogLevel::WARNING),
-        E_COMPILE_WARNING => array(null, LogLevel::WARNING),
-        E_CORE_WARNING => array(null, LogLevel::WARNING),
-        E_USER_ERROR => array(null, LogLevel::CRITICAL),
-        E_RECOVERABLE_ERROR => array(null, LogLevel::CRITICAL),
-        E_COMPILE_ERROR => array(null, LogLevel::CRITICAL),
-        E_PARSE => array(null, LogLevel::CRITICAL),
-        E_ERROR => array(null, LogLevel::CRITICAL),
-        E_CORE_ERROR => array(null, LogLevel::CRITICAL),
-    );
+    private $loggers = [
+        E_DEPRECATED => [null, LogLevel::INFO],
+        E_USER_DEPRECATED => [null, LogLevel::INFO],
+        E_NOTICE => [null, LogLevel::WARNING],
+        E_USER_NOTICE => [null, LogLevel::WARNING],
+        E_STRICT => [null, LogLevel::WARNING],
+        E_WARNING => [null, LogLevel::WARNING],
+        E_USER_WARNING => [null, LogLevel::WARNING],
+        E_COMPILE_WARNING => [null, LogLevel::WARNING],
+        E_CORE_WARNING => [null, LogLevel::WARNING],
+        E_USER_ERROR => [null, LogLevel::CRITICAL],
+        E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
+        E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
+        E_PARSE => [null, LogLevel::CRITICAL],
+        E_ERROR => [null, LogLevel::CRITICAL],
+        E_CORE_ERROR => [null, LogLevel::CRITICAL],
+    ];
 
     private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
     private $scopedErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
@@ -100,7 +100,7 @@ class ErrorHandler
 
     private static $reservedMemory;
     private static $toStringException = null;
-    private static $silencedErrorCache = array();
+    private static $silencedErrorCache = [];
     private static $silencedErrorCount = 0;
     private static $exitCode = 0;
 
@@ -123,10 +123,10 @@ class ErrorHandler
             $handler = new static();
         }
 
-        if (null === $prev = set_error_handler(array($handler, 'handleError'))) {
+        if (null === $prev = set_error_handler([$handler, 'handleError'])) {
             restore_error_handler();
             // Specifying the error types earlier would expose us to https://bugs.php.net/63206
-            set_error_handler(array($handler, 'handleError'), $handler->thrownErrors | $handler->loggedErrors);
+            set_error_handler([$handler, 'handleError'], $handler->thrownErrors | $handler->loggedErrors);
             $handler->isRoot = true;
         }
 
@@ -140,12 +140,12 @@ class ErrorHandler
         } else {
             $handlerIsRegistered = true;
         }
-        if (\is_array($prev = set_exception_handler(array($handler, 'handleException'))) && $prev[0] instanceof self) {
+        if (\is_array($prev = set_exception_handler([$handler, 'handleException'])) && $prev[0] instanceof self) {
             restore_exception_handler();
             if (!$handlerIsRegistered) {
                 $handler = $prev[0];
             } elseif ($handler !== $prev[0] && $replace) {
-                set_exception_handler(array($handler, 'handleException'));
+                set_exception_handler([$handler, 'handleException']);
                 $p = $prev[0]->setExceptionHandler(null);
                 $handler->setExceptionHandler($p);
                 $prev[0]->setExceptionHandler($p);
@@ -178,12 +178,12 @@ class ErrorHandler
      */
     public function setDefaultLogger(LoggerInterface $logger, $levels = E_ALL, $replace = false)
     {
-        $loggers = array();
+        $loggers = [];
 
         if (\is_array($levels)) {
             foreach ($levels as $type => $logLevel) {
                 if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
-                    $loggers[$type] = array($logger, $logLevel);
+                    $loggers[$type] = [$logger, $logLevel];
                 }
             }
         } else {
@@ -214,14 +214,14 @@ class ErrorHandler
     {
         $prevLogged = $this->loggedErrors;
         $prev = $this->loggers;
-        $flush = array();
+        $flush = [];
 
         foreach ($loggers as $type => $log) {
             if (!isset($prev[$type])) {
                 throw new \InvalidArgumentException('Unknown error type: '.$type);
             }
             if (!\is_array($log)) {
-                $log = array($log);
+                $log = [$log];
             } elseif (!array_key_exists(0, $log)) {
                 throw new \InvalidArgumentException('No logger provided');
             }
@@ -358,9 +358,9 @@ class ErrorHandler
             if ($handler === $this) {
                 restore_error_handler();
                 if ($this->isRoot) {
-                    set_error_handler(array($this, 'handleError'), $this->thrownErrors | $this->loggedErrors);
+                    set_error_handler([$this, 'handleError'], $this->thrownErrors | $this->loggedErrors);
                 } else {
-                    set_error_handler(array($this, 'handleError'));
+                    set_error_handler([$this, 'handleError']);
                 }
             }
         }
@@ -397,9 +397,9 @@ class ErrorHandler
         $scope = $this->scopedErrors & $type;
 
         if (4 < $numArgs = \func_num_args()) {
-            $context = $scope ? (func_get_arg(4) ?: array()) : array();
+            $context = $scope ? (func_get_arg(4) ?: []) : [];
         } else {
-            $context = array();
+            $context = [];
         }
 
         if (isset($context['GLOBALS']) && $scope) {
@@ -419,19 +419,19 @@ class ErrorHandler
             self::$toStringException = null;
         } elseif (!$throw && !($type & $level)) {
             if (!isset(self::$silencedErrorCache[$id = $file.':'.$line])) {
-                $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 5), $type, $file, $line, false) : array();
-                $errorAsException = new SilencedErrorContext($type, $file, $line, isset($lightTrace[1]) ? array($lightTrace[0]) : $lightTrace);
+                $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 5), $type, $file, $line, false) : [];
+                $errorAsException = new SilencedErrorContext($type, $file, $line, isset($lightTrace[1]) ? [$lightTrace[0]] : $lightTrace);
             } elseif (isset(self::$silencedErrorCache[$id][$message])) {
                 $lightTrace = null;
                 $errorAsException = self::$silencedErrorCache[$id][$message];
                 ++$errorAsException->count;
             } else {
-                $lightTrace = array();
+                $lightTrace = [];
                 $errorAsException = null;
             }
 
             if (100 < ++self::$silencedErrorCount) {
-                self::$silencedErrorCache = $lightTrace = array();
+                self::$silencedErrorCache = $lightTrace = [];
                 self::$silencedErrorCount = 1;
             }
             if ($errorAsException) {
@@ -448,8 +448,8 @@ class ErrorHandler
                 $lightTrace = $this->cleanTrace($backtrace, $type, $file, $line, $throw);
                 $this->traceReflector->setValue($errorAsException, $lightTrace);
             } else {
-                $this->traceReflector->setValue($errorAsException, array());
-                $backtrace = array();
+                $this->traceReflector->setValue($errorAsException, []);
+                $backtrace = [];
             }
         }
 
@@ -495,7 +495,7 @@ class ErrorHandler
             try {
                 $this->isRecursive = true;
                 $level = ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG;
-                $this->loggers[$type][0]->log($level, $logMessage, $errorAsException ? array('exception' => $errorAsException) : array());
+                $this->loggers[$type][0]->log($level, $logMessage, $errorAsException ? ['exception' => $errorAsException] : []);
             } finally {
                 $this->isRecursive = false;
             }
@@ -529,12 +529,12 @@ class ErrorHandler
             }
             if ($exception instanceof FatalErrorException) {
                 if ($exception instanceof FatalThrowableError) {
-                    $error = array(
+                    $error = [
                         'type' => $type,
                         'message' => $message,
                         'file' => $exception->getFile(),
                         'line' => $exception->getLine(),
-                    );
+                    ];
                 } else {
                     $message = 'Fatal '.$message;
                 }
@@ -546,7 +546,7 @@ class ErrorHandler
         }
         if ($this->loggedErrors & $type) {
             try {
-                $this->loggers[$type][0]->log($this->loggers[$type][1], $message, array('exception' => $exception));
+                $this->loggers[$type][0]->log($this->loggers[$type][1], $message, ['exception' => $exception]);
             } catch (\Throwable $handlerException) {
             }
         }
@@ -588,7 +588,7 @@ class ErrorHandler
         }
 
         $handler = self::$reservedMemory = null;
-        $handlers = array();
+        $handlers = [];
         $previousHandler = null;
         $sameHandlerLimit = 10;
 
@@ -619,7 +619,7 @@ class ErrorHandler
             $handler[0]->setExceptionHandler($h);
         }
         $handler = $handler[0];
-        $handlers = array();
+        $handlers = [];
 
         if ($exit = null === $error) {
             $error = error_get_last();
@@ -663,11 +663,11 @@ class ErrorHandler
      */
     protected function getFatalErrorHandlers()
     {
-        return array(
+        return [
             new UndefinedFunctionFatalErrorHandler(),
             new UndefinedMethodFatalErrorHandler(),
             new ClassNotFoundFatalErrorHandler(),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Debug/Exception/FatalErrorException.php b/src/Symfony/Component/Debug/Exception/FatalErrorException.php
index 8305d39218..93880fbc32 100644
--- a/src/Symfony/Component/Debug/Exception/FatalErrorException.php
+++ b/src/Symfony/Component/Debug/Exception/FatalErrorException.php
@@ -61,7 +61,7 @@ class FatalErrorException extends \ErrorException
                 unset($frame);
                 $trace = array_reverse($trace);
             } else {
-                $trace = array();
+                $trace = [];
             }
 
             $this->setTrace($trace);
diff --git a/src/Symfony/Component/Debug/Exception/FlattenException.php b/src/Symfony/Component/Debug/Exception/FlattenException.php
index f85522ce62..d016bb2fb4 100644
--- a/src/Symfony/Component/Debug/Exception/FlattenException.php
+++ b/src/Symfony/Component/Debug/Exception/FlattenException.php
@@ -33,12 +33,12 @@ class FlattenException
     private $file;
     private $line;
 
-    public static function create(\Exception $exception, $statusCode = null, array $headers = array())
+    public static function create(\Exception $exception, $statusCode = null, array $headers = [])
     {
         return static::createFromThrowable($exception, $statusCode, $headers);
     }
 
-    public static function createFromThrowable(\Throwable $exception, ?int $statusCode = null, array $headers = array()): self
+    public static function createFromThrowable(\Throwable $exception, ?int $statusCode = null, array $headers = []): self
     {
         $e = new static();
         $e->setMessage($exception->getMessage());
@@ -73,13 +73,13 @@ class FlattenException
 
     public function toArray()
     {
-        $exceptions = array();
-        foreach (array_merge(array($this), $this->getAllPrevious()) as $exception) {
-            $exceptions[] = array(
+        $exceptions = [];
+        foreach (array_merge([$this], $this->getAllPrevious()) as $exception) {
+            $exceptions[] = [
                 'message' => $exception->getMessage(),
                 'class' => $exception->getClass(),
                 'trace' => $exception->getTrace(),
-            );
+            ];
         }
 
         return $exceptions;
@@ -213,7 +213,7 @@ class FlattenException
 
     public function getAllPrevious()
     {
-        $exceptions = array();
+        $exceptions = [];
         $e = $this;
         while ($e = $e->getPrevious()) {
             $exceptions[] = $e;
@@ -247,8 +247,8 @@ class FlattenException
      */
     public function setTrace($trace, $file, $line)
     {
-        $this->trace = array();
-        $this->trace[] = array(
+        $this->trace = [];
+        $this->trace[] = [
             'namespace' => '',
             'short_class' => '',
             'class' => '',
@@ -256,8 +256,8 @@ class FlattenException
             'function' => '',
             'file' => $file,
             'line' => $line,
-            'args' => array(),
-        );
+            'args' => [],
+        ];
         foreach ($trace as $entry) {
             $class = '';
             $namespace = '';
@@ -267,7 +267,7 @@ class FlattenException
                 $namespace = implode('\\', $parts);
             }
 
-            $this->trace[] = array(
+            $this->trace[] = [
                 'namespace' => $namespace,
                 'short_class' => $class,
                 'class' => isset($entry['class']) ? $entry['class'] : '',
@@ -275,8 +275,8 @@ class FlattenException
                 'function' => isset($entry['function']) ? $entry['function'] : null,
                 'file' => isset($entry['file']) ? $entry['file'] : null,
                 'line' => isset($entry['line']) ? $entry['line'] : null,
-                'args' => isset($entry['args']) ? $this->flattenArgs($entry['args']) : array(),
-            );
+                'args' => isset($entry['args']) ? $this->flattenArgs($entry['args']) : [],
+            ];
         }
 
         return $this;
@@ -284,34 +284,34 @@ class FlattenException
 
     private function flattenArgs($args, $level = 0, &$count = 0)
     {
-        $result = array();
+        $result = [];
         foreach ($args as $key => $value) {
             if (++$count > 1e4) {
-                return array('array', '*SKIPPED over 10000 entries*');
+                return ['array', '*SKIPPED over 10000 entries*'];
             }
             if ($value instanceof \__PHP_Incomplete_Class) {
                 // is_object() returns false on PHP<=7.1
-                $result[$key] = array('incomplete-object', $this->getClassNameFromIncomplete($value));
+                $result[$key] = ['incomplete-object', $this->getClassNameFromIncomplete($value)];
             } elseif (\is_object($value)) {
-                $result[$key] = array('object', \get_class($value));
+                $result[$key] = ['object', \get_class($value)];
             } elseif (\is_array($value)) {
                 if ($level > 10) {
-                    $result[$key] = array('array', '*DEEP NESTED ARRAY*');
+                    $result[$key] = ['array', '*DEEP NESTED ARRAY*'];
                 } else {
-                    $result[$key] = array('array', $this->flattenArgs($value, $level + 1, $count));
+                    $result[$key] = ['array', $this->flattenArgs($value, $level + 1, $count)];
                 }
             } elseif (null === $value) {
-                $result[$key] = array('null', null);
+                $result[$key] = ['null', null];
             } elseif (\is_bool($value)) {
-                $result[$key] = array('boolean', $value);
+                $result[$key] = ['boolean', $value];
             } elseif (\is_int($value)) {
-                $result[$key] = array('integer', $value);
+                $result[$key] = ['integer', $value];
             } elseif (\is_float($value)) {
-                $result[$key] = array('float', $value);
+                $result[$key] = ['float', $value];
             } elseif (\is_resource($value)) {
-                $result[$key] = array('resource', get_resource_type($value));
+                $result[$key] = ['resource', get_resource_type($value)];
             } else {
-                $result[$key] = array('string', (string) $value);
+                $result[$key] = ['string', (string) $value];
             }
         }
 
diff --git a/src/Symfony/Component/Debug/Exception/SilencedErrorContext.php b/src/Symfony/Component/Debug/Exception/SilencedErrorContext.php
index 6f84617c46..236c56ed0e 100644
--- a/src/Symfony/Component/Debug/Exception/SilencedErrorContext.php
+++ b/src/Symfony/Component/Debug/Exception/SilencedErrorContext.php
@@ -25,7 +25,7 @@ class SilencedErrorContext implements \JsonSerializable
     private $line;
     private $trace;
 
-    public function __construct(int $severity, string $file, int $line, array $trace = array(), int $count = 1)
+    public function __construct(int $severity, string $file, int $line, array $trace = [], int $count = 1)
     {
         $this->severity = $severity;
         $this->file = $file;
@@ -56,12 +56,12 @@ class SilencedErrorContext implements \JsonSerializable
 
     public function JsonSerialize()
     {
-        return array(
+        return [
             'severity' => $this->severity,
             'file' => $this->file,
             'line' => $this->line,
             'trace' => $this->trace,
             'count' => $this->count,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Debug/ExceptionHandler.php b/src/Symfony/Component/Debug/ExceptionHandler.php
index 1076cf57ef..a93121584c 100644
--- a/src/Symfony/Component/Debug/ExceptionHandler.php
+++ b/src/Symfony/Component/Debug/ExceptionHandler.php
@@ -58,10 +58,10 @@ class ExceptionHandler
     {
         $handler = new static($debug, $charset, $fileLinkFormat);
 
-        $prev = set_exception_handler(array($handler, 'handle'));
+        $prev = set_exception_handler([$handler, 'handle']);
         if (\is_array($prev) && $prev[0] instanceof ErrorHandler) {
             restore_exception_handler();
-            $prev[0]->setExceptionHandler(array($handler, 'handle'));
+            $prev[0]->setExceptionHandler([$handler, 'handle']);
         }
 
         return $handler;
@@ -380,7 +380,7 @@ EOF;
 
         if (\is_string($fmt)) {
             $i = strpos($f = $fmt, '&', max(strrpos($f, '%f'), strrpos($f, '%l'))) ?: \strlen($f);
-            $fmt = array(substr($f, 0, $i)) + preg_split('/&([^>]++)>/', substr($f, $i), -1, PREG_SPLIT_DELIM_CAPTURE);
+            $fmt = [substr($f, 0, $i)] + preg_split('/&([^>]++)>/', substr($f, $i), -1, PREG_SPLIT_DELIM_CAPTURE);
 
             for ($i = 1; isset($fmt[$i]); ++$i) {
                 if (0 === strpos($path, $k = $fmt[$i++])) {
@@ -389,7 +389,7 @@ EOF;
                 }
             }
 
-            $link = strtr($fmt[0], array('%f' => $path, '%l' => $line));
+            $link = strtr($fmt[0], ['%f' => $path, '%l' => $line]);
         } else {
             $link = $fmt->format($path, $line);
         }
@@ -406,7 +406,7 @@ EOF;
      */
     private function formatArgs(array $args)
     {
-        $result = array();
+        $result = [];
         foreach ($args as $key => $item) {
             if ('object' === $item[0]) {
                 $formattedValue = sprintf('<em>object</em>(%s)', $this->formatClass($item[1]));
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
index 4ccd16fe30..30c5665e60 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php
@@ -40,7 +40,7 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
             return;
         }
 
-        foreach (array('class', 'interface', 'trait') as $typeName) {
+        foreach (['class', 'interface', 'trait'] as $typeName) {
             $prefix = ucfirst($typeName).' \'';
             $prefixLen = \strlen($prefix);
             if (0 !== strpos($error['message'], $prefix)) {
@@ -86,11 +86,11 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
     private function getClassCandidates(string $class): array
     {
         if (!\is_array($functions = spl_autoload_functions())) {
-            return array();
+            return [];
         }
 
         // find Symfony and Composer autoloaders
-        $classes = array();
+        $classes = [];
 
         foreach ($functions as $function) {
             if (!\is_array($function)) {
@@ -127,10 +127,10 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
     private function findClassInPath(string $path, string $class, string $prefix): array
     {
         if (!$path = realpath($path.'/'.strtr($prefix, '\\_', '//')) ?: realpath($path.'/'.\dirname(strtr($prefix, '\\_', '//'))) ?: realpath($path)) {
-            return array();
+            return [];
         }
 
-        $classes = array();
+        $classes = [];
         $filename = $class.'.php';
         foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
             if ($filename == $file->getFileName() && $class = $this->convertFileToClass($path, $file->getPathName(), $prefix)) {
@@ -143,9 +143,9 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
 
     private function convertFileToClass(string $path, string $file, string $prefix): ?string
     {
-        $candidates = array(
+        $candidates = [
             // namespaced class
-            $namespacedClass = str_replace(array($path.\DIRECTORY_SEPARATOR, '.php', '/'), array('', '', '\\'), $file),
+            $namespacedClass = str_replace([$path.\DIRECTORY_SEPARATOR, '.php', '/'], ['', '', '\\'], $file),
             // namespaced class (with target dir)
             $prefix.$namespacedClass,
             // namespaced class (with target dir and separator)
@@ -156,7 +156,7 @@ class ClassNotFoundFatalErrorHandler implements FatalErrorHandlerInterface
             str_replace('\\', '_', $prefix.$namespacedClass),
             // PEAR class (with target dir and separator)
             str_replace('\\', '_', $prefix.'\\'.$namespacedClass),
-        );
+        ];
 
         if ($prefix) {
             $candidates = array_filter($candidates, function ($candidate) use ($prefix) { return 0 === strpos($candidate, $prefix); });
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
index db24180377..9eddeba5a6 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedFunctionFatalErrorHandler.php
@@ -53,7 +53,7 @@ class UndefinedFunctionFatalErrorHandler implements FatalErrorHandlerInterface
             $message = sprintf('Attempted to call function "%s" from the global namespace.', $functionName);
         }
 
-        $candidates = array();
+        $candidates = [];
         foreach (get_defined_functions() as $type => $definedFunctionNames) {
             foreach ($definedFunctionNames as $definedFunctionName) {
                 if (false !== $namespaceSeparatorIndex = strrpos($definedFunctionName, '\\')) {
diff --git a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
index 618a2c208b..1318cb13ba 100644
--- a/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
+++ b/src/Symfony/Component/Debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php
@@ -41,7 +41,7 @@ class UndefinedMethodFatalErrorHandler implements FatalErrorHandlerInterface
             return new UndefinedMethodException($message, $exception);
         }
 
-        $candidates = array();
+        $candidates = [];
         foreach ($methods as $definedMethodName) {
             $lev = levenshtein($methodName, $definedMethodName);
             if ($lev <= \strlen($methodName) / 3 || false !== strpos($definedMethodName, $methodName)) {
diff --git a/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php b/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
index b5582f15fc..8d0a5cca3d 100644
--- a/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
+++ b/src/Symfony/Component/Debug/Tests/DebugClassLoaderTest.php
@@ -27,14 +27,14 @@ class DebugClassLoaderTest extends TestCase
     {
         $this->errorReporting = error_reporting(E_ALL);
         $this->loader = new ClassLoader();
-        spl_autoload_register(array($this->loader, 'loadClass'), true, true);
+        spl_autoload_register([$this->loader, 'loadClass'], true, true);
         DebugClassLoader::enable();
     }
 
     protected function tearDown()
     {
         DebugClassLoader::disable();
-        spl_autoload_unregister(array($this->loader, 'loadClass'));
+        spl_autoload_unregister([$this->loader, 'loadClass']);
         error_reporting($this->errorReporting);
     }
 
@@ -136,20 +136,20 @@ class DebugClassLoaderTest extends TestCase
         $lastError = error_get_last();
         unset($lastError['file'], $lastError['line']);
 
-        $xError = array(
+        $xError = [
             'type' => E_USER_DEPRECATED,
             'message' => 'The "Test\Symfony\Component\Debug\Tests\\'.$class.'" class '.$type.' "Symfony\Component\Debug\Tests\Fixtures\\'.$super.'" that is deprecated but this is a test deprecation notice.',
-        );
+        ];
 
         $this->assertSame($xError, $lastError);
     }
 
     public function provideDeprecatedSuper()
     {
-        return array(
-            array('DeprecatedInterfaceClass', 'DeprecatedInterface', 'implements'),
-            array('DeprecatedParentClass', 'DeprecatedClass', 'extends'),
-        );
+        return [
+            ['DeprecatedInterfaceClass', 'DeprecatedInterface', 'implements'],
+            ['DeprecatedParentClass', 'DeprecatedClass', 'extends'],
+        ];
     }
 
     public function testInterfaceExtendsDeprecatedInterface()
@@ -166,10 +166,10 @@ class DebugClassLoaderTest extends TestCase
         $lastError = error_get_last();
         unset($lastError['file'], $lastError['line']);
 
-        $xError = array(
+        $xError = [
             'type' => E_USER_NOTICE,
             'message' => '',
-        );
+        ];
 
         $this->assertSame($xError, $lastError);
     }
@@ -188,10 +188,10 @@ class DebugClassLoaderTest extends TestCase
         $lastError = error_get_last();
         unset($lastError['file'], $lastError['line']);
 
-        $xError = array(
+        $xError = [
             'type' => E_USER_NOTICE,
             'message' => '',
-        );
+        ];
 
         $this->assertSame($xError, $lastError);
     }
@@ -210,17 +210,17 @@ class DebugClassLoaderTest extends TestCase
         $lastError = error_get_last();
         unset($lastError['file'], $lastError['line']);
 
-        $xError = array(
+        $xError = [
             'type' => E_USER_DEPRECATED,
             'message' => 'The "Symfony\Component\Debug\Tests\Fixtures\FinalClass" class is considered final. It may change without further notice as of its next major version. You should not extend it from "Test\Symfony\Component\Debug\Tests\ExtendsFinalClass".',
-        );
+        ];
 
         $this->assertSame($xError, $lastError);
     }
 
     public function testExtendedFinalMethod()
     {
-        $deprecations = array();
+        $deprecations = [];
         set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
         $e = error_reporting(E_USER_DEPRECATED);
 
@@ -229,10 +229,10 @@ class DebugClassLoaderTest extends TestCase
         error_reporting($e);
         restore_error_handler();
 
-        $xError = array(
+        $xError = [
             'The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".',
             'The "Symfony\Component\Debug\Tests\Fixtures\FinalMethod::finalMethod2()" method is considered final. It may change without further notice as of its next major version. You should not extend it from "Symfony\Component\Debug\Tests\Fixtures\ExtendedFinalMethod".',
-        );
+        ];
 
         $this->assertSame($xError, $deprecations);
     }
@@ -251,12 +251,12 @@ class DebugClassLoaderTest extends TestCase
         $lastError = error_get_last();
         unset($lastError['file'], $lastError['line']);
 
-        $this->assertSame(array('type' => E_USER_NOTICE, 'message' => ''), $lastError);
+        $this->assertSame(['type' => E_USER_NOTICE, 'message' => ''], $lastError);
     }
 
     public function testInternalsUse()
     {
-        $deprecations = array();
+        $deprecations = [];
         set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
         $e = error_reporting(E_USER_DEPRECATED);
 
@@ -265,17 +265,17 @@ class DebugClassLoaderTest extends TestCase
         error_reporting($e);
         restore_error_handler();
 
-        $this->assertSame($deprecations, array(
+        $this->assertSame($deprecations, [
             'The "Symfony\Component\Debug\Tests\Fixtures\InternalInterface" interface is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternalsParent".',
             'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass" class is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternalsParent".',
             'The "Symfony\Component\Debug\Tests\Fixtures\InternalTrait" trait is considered internal. It may change without further notice. You should not use it from "Test\Symfony\Component\Debug\Tests\ExtendsInternals".',
             'The "Symfony\Component\Debug\Tests\Fixtures\InternalClass::internalMethod()" method is considered internal. It may change without further notice. You should not extend it from "Test\Symfony\Component\Debug\Tests\ExtendsInternals".',
-        ));
+        ]);
     }
 
     public function testExtendedMethodDefinesNewParameters()
     {
-        $deprecations = array();
+        $deprecations = [];
         set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
         $e = error_reporting(E_USER_DEPRECATED);
 
@@ -284,16 +284,16 @@ class DebugClassLoaderTest extends TestCase
         error_reporting($e);
         restore_error_handler();
 
-        $this->assertSame(array(
+        $this->assertSame([
             'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::quzMethod()" method will require a new "Quz $quz" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\ClassWithAnnotatedParameters", not defining it is deprecated.',
             'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::whereAmI()" method will require a new "bool $matrix" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\InterfaceWithAnnotatedParameters", not defining it is deprecated.',
             'The "Symfony\Component\Debug\Tests\Fixtures\SubClassWithAnnotatedParameters::isSymfony()" method will require a new "true $yes" argument in the next major version of its parent class "Symfony\Component\Debug\Tests\Fixtures\ClassWithAnnotatedParameters", not defining it is deprecated.',
-        ), $deprecations);
+        ], $deprecations);
     }
 
     public function testUseTraitWithInternalMethod()
     {
-        $deprecations = array();
+        $deprecations = [];
         set_error_handler(function ($type, $msg) use (&$deprecations) { $deprecations[] = $msg; });
         $e = error_reporting(E_USER_DEPRECATED);
 
@@ -302,7 +302,7 @@ class DebugClassLoaderTest extends TestCase
         error_reporting($e);
         restore_error_handler();
 
-        $this->assertSame(array(), $deprecations);
+        $this->assertSame([], $deprecations);
     }
 
     public function testVirtualUse()
@@ -354,7 +354,7 @@ class ClassLoader
 
     public function getClassMap()
     {
-        return array(__NAMESPACE__.'\Fixtures\NotPSR0bis' => __DIR__.'/Fixtures/notPsr0Bis.php');
+        return [__NAMESPACE__.'\Fixtures\NotPSR0bis' => __DIR__.'/Fixtures/notPsr0Bis.php'];
     }
 
     public function findFile($class)
diff --git a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
index 15e476381a..069796cddb 100644
--- a/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/ErrorHandlerTest.php
@@ -38,13 +38,13 @@ class ErrorHandlerTest extends TestCase
             $this->assertSame($handler, ErrorHandler::register($newHandler, false));
             $h = set_error_handler('var_dump');
             restore_error_handler();
-            $this->assertSame(array($handler, 'handleError'), $h);
+            $this->assertSame([$handler, 'handleError'], $h);
 
             try {
                 $this->assertSame($newHandler, ErrorHandler::register($newHandler, true));
                 $h = set_error_handler('var_dump');
                 restore_error_handler();
-                $this->assertSame(array($newHandler, 'handleError'), $h);
+                $this->assertSame([$newHandler, 'handleError'], $h);
             } catch (\Exception $e) {
             }
 
@@ -74,12 +74,12 @@ class ErrorHandlerTest extends TestCase
 
         try {
             @trigger_error('Hello', E_USER_WARNING);
-            $expected = array(
+            $expected = [
                 'type' => E_USER_WARNING,
                 'message' => 'Hello',
                 'file' => __FILE__,
                 'line' => __LINE__ - 5,
-            );
+            ];
             $this->assertSame($expected, error_get_last());
         } catch (\Exception $e) {
             restore_error_handler();
@@ -145,26 +145,26 @@ class ErrorHandlerTest extends TestCase
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
             $handler->setDefaultLogger($logger, E_NOTICE);
-            $handler->setDefaultLogger($logger, array(E_USER_NOTICE => LogLevel::CRITICAL));
+            $handler->setDefaultLogger($logger, [E_USER_NOTICE => LogLevel::CRITICAL]);
 
-            $loggers = array(
-                E_DEPRECATED => array(null, LogLevel::INFO),
-                E_USER_DEPRECATED => array(null, LogLevel::INFO),
-                E_NOTICE => array($logger, LogLevel::WARNING),
-                E_USER_NOTICE => array($logger, LogLevel::CRITICAL),
-                E_STRICT => array(null, LogLevel::WARNING),
-                E_WARNING => array(null, LogLevel::WARNING),
-                E_USER_WARNING => array(null, LogLevel::WARNING),
-                E_COMPILE_WARNING => array(null, LogLevel::WARNING),
-                E_CORE_WARNING => array(null, LogLevel::WARNING),
-                E_USER_ERROR => array(null, LogLevel::CRITICAL),
-                E_RECOVERABLE_ERROR => array(null, LogLevel::CRITICAL),
-                E_COMPILE_ERROR => array(null, LogLevel::CRITICAL),
-                E_PARSE => array(null, LogLevel::CRITICAL),
-                E_ERROR => array(null, LogLevel::CRITICAL),
-                E_CORE_ERROR => array(null, LogLevel::CRITICAL),
-            );
-            $this->assertSame($loggers, $handler->setLoggers(array()));
+            $loggers = [
+                E_DEPRECATED => [null, LogLevel::INFO],
+                E_USER_DEPRECATED => [null, LogLevel::INFO],
+                E_NOTICE => [$logger, LogLevel::WARNING],
+                E_USER_NOTICE => [$logger, LogLevel::CRITICAL],
+                E_STRICT => [null, LogLevel::WARNING],
+                E_WARNING => [null, LogLevel::WARNING],
+                E_USER_WARNING => [null, LogLevel::WARNING],
+                E_COMPILE_WARNING => [null, LogLevel::WARNING],
+                E_CORE_WARNING => [null, LogLevel::WARNING],
+                E_USER_ERROR => [null, LogLevel::CRITICAL],
+                E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
+                E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
+                E_PARSE => [null, LogLevel::CRITICAL],
+                E_ERROR => [null, LogLevel::CRITICAL],
+                E_CORE_ERROR => [null, LogLevel::CRITICAL],
+            ];
+            $this->assertSame($loggers, $handler->setLoggers([]));
         } finally {
             restore_error_handler();
             restore_exception_handler();
@@ -176,14 +176,14 @@ class ErrorHandlerTest extends TestCase
         try {
             $handler = ErrorHandler::register();
             $handler->throwAt(0, true);
-            $this->assertFalse($handler->handleError(0, 'foo', 'foo.php', 12, array()));
+            $this->assertFalse($handler->handleError(0, 'foo', 'foo.php', 12, []));
 
             restore_error_handler();
             restore_exception_handler();
 
             $handler = ErrorHandler::register();
             $handler->throwAt(3, true);
-            $this->assertFalse($handler->handleError(4, 'foo', 'foo.php', 12, array()));
+            $this->assertFalse($handler->handleError(4, 'foo', 'foo.php', 12, []));
 
             restore_error_handler();
             restore_exception_handler();
@@ -191,7 +191,7 @@ class ErrorHandlerTest extends TestCase
             $handler = ErrorHandler::register();
             $handler->throwAt(3, true);
             try {
-                $handler->handleError(4, 'foo', 'foo.php', 12, array());
+                $handler->handleError(4, 'foo', 'foo.php', 12, []);
             } catch (\ErrorException $e) {
                 $this->assertSame('Parse Error: foo', $e->getMessage());
                 $this->assertSame(4, $e->getSeverity());
@@ -204,14 +204,14 @@ class ErrorHandlerTest extends TestCase
 
             $handler = ErrorHandler::register();
             $handler->throwAt(E_USER_DEPRECATED, true);
-            $this->assertFalse($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, array()));
+            $this->assertFalse($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));
 
             restore_error_handler();
             restore_exception_handler();
 
             $handler = ErrorHandler::register();
             $handler->throwAt(E_DEPRECATED, true);
-            $this->assertFalse($handler->handleError(E_DEPRECATED, 'foo', 'foo.php', 12, array()));
+            $this->assertFalse($handler->handleError(E_DEPRECATED, 'foo', 'foo.php', 12, []));
 
             restore_error_handler();
             restore_exception_handler();
@@ -236,7 +236,7 @@ class ErrorHandlerTest extends TestCase
 
             $handler = ErrorHandler::register();
             $handler->setDefaultLogger($logger, E_USER_DEPRECATED);
-            $this->assertTrue($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, array()));
+            $this->assertTrue($handler->handleError(E_USER_DEPRECATED, 'foo', 'foo.php', 12, []));
 
             restore_error_handler();
             restore_exception_handler();
@@ -320,7 +320,7 @@ class ErrorHandlerTest extends TestCase
 
         $handler = new ErrorHandler();
         $handler->setDefaultLogger($logger);
-        @$handler->handleError(E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, array());
+        @$handler->handleError(E_USER_DEPRECATED, 'Foo deprecation', __FILE__, __LINE__, []);
     }
 
     public function testHandleException()
@@ -369,27 +369,27 @@ class ErrorHandlerTest extends TestCase
         $bootLogger = new BufferingLogger();
         $handler = new ErrorHandler($bootLogger);
 
-        $loggers = array(
-            E_DEPRECATED => array($bootLogger, LogLevel::INFO),
-            E_USER_DEPRECATED => array($bootLogger, LogLevel::INFO),
-            E_NOTICE => array($bootLogger, LogLevel::WARNING),
-            E_USER_NOTICE => array($bootLogger, LogLevel::WARNING),
-            E_STRICT => array($bootLogger, LogLevel::WARNING),
-            E_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_USER_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_COMPILE_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_CORE_WARNING => array($bootLogger, LogLevel::WARNING),
-            E_USER_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_RECOVERABLE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_COMPILE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_PARSE => array($bootLogger, LogLevel::CRITICAL),
-            E_ERROR => array($bootLogger, LogLevel::CRITICAL),
-            E_CORE_ERROR => array($bootLogger, LogLevel::CRITICAL),
-        );
+        $loggers = [
+            E_DEPRECATED => [$bootLogger, LogLevel::INFO],
+            E_USER_DEPRECATED => [$bootLogger, LogLevel::INFO],
+            E_NOTICE => [$bootLogger, LogLevel::WARNING],
+            E_USER_NOTICE => [$bootLogger, LogLevel::WARNING],
+            E_STRICT => [$bootLogger, LogLevel::WARNING],
+            E_WARNING => [$bootLogger, LogLevel::WARNING],
+            E_USER_WARNING => [$bootLogger, LogLevel::WARNING],
+            E_COMPILE_WARNING => [$bootLogger, LogLevel::WARNING],
+            E_CORE_WARNING => [$bootLogger, LogLevel::WARNING],
+            E_USER_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            E_RECOVERABLE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            E_COMPILE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            E_PARSE => [$bootLogger, LogLevel::CRITICAL],
+            E_ERROR => [$bootLogger, LogLevel::CRITICAL],
+            E_CORE_ERROR => [$bootLogger, LogLevel::CRITICAL],
+        ];
 
-        $this->assertSame($loggers, $handler->setLoggers(array()));
+        $this->assertSame($loggers, $handler->setLoggers([]));
 
-        $handler->handleError(E_DEPRECATED, 'Foo message', __FILE__, 123, array());
+        $handler->handleError(E_DEPRECATED, 'Foo message', __FILE__, 123, []);
 
         $logs = $bootLogger->cleanLogs();
 
@@ -405,14 +405,14 @@ class ErrorHandlerTest extends TestCase
         $this->assertSame(123, $exception->getLine());
         $this->assertSame(E_DEPRECATED, $exception->getSeverity());
 
-        $bootLogger->log(LogLevel::WARNING, 'Foo message', array('exception' => $exception));
+        $bootLogger->log(LogLevel::WARNING, 'Foo message', ['exception' => $exception]);
 
         $mockLogger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
         $mockLogger->expects($this->once())
             ->method('log')
-            ->with(LogLevel::WARNING, 'Foo message', array('exception' => $exception));
+            ->with(LogLevel::WARNING, 'Foo message', ['exception' => $exception]);
 
-        $handler->setLoggers(array(E_DEPRECATED => array($mockLogger, LogLevel::WARNING)));
+        $handler->setLoggers([E_DEPRECATED => [$mockLogger, LogLevel::WARNING]]);
     }
 
     public function testSettingLoggerWhenExceptionIsBuffered()
@@ -425,7 +425,7 @@ class ErrorHandlerTest extends TestCase
         $mockLogger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
         $mockLogger->expects($this->once())
             ->method('log')
-            ->with(LogLevel::CRITICAL, 'Uncaught Exception: Foo message', array('exception' => $exception));
+            ->with(LogLevel::CRITICAL, 'Uncaught Exception: Foo message', ['exception' => $exception]);
 
         $handler->setExceptionHandler(function () use ($handler, $mockLogger) {
             $handler->setDefaultLogger($mockLogger);
@@ -439,12 +439,12 @@ class ErrorHandlerTest extends TestCase
         try {
             $handler = ErrorHandler::register();
 
-            $error = array(
+            $error = [
                 'type' => E_PARSE,
                 'message' => 'foo',
                 'file' => 'bar',
                 'line' => 123,
-            );
+            ];
 
             $logger = $this->getMockBuilder('Psr\Log\LoggerInterface')->getMock();
 
diff --git a/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php b/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
index 5b77b999a7..eb884b51c1 100644
--- a/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
+++ b/src/Symfony/Component/Debug/Tests/Exception/FlattenExceptionTest.php
@@ -61,7 +61,7 @@ class FlattenExceptionTest extends TestCase
         $flattened = FlattenException::create(new ConflictHttpException());
         $this->assertEquals('409', $flattened->getStatusCode());
 
-        $flattened = FlattenException::create(new MethodNotAllowedHttpException(array('POST')));
+        $flattened = FlattenException::create(new MethodNotAllowedHttpException(['POST']));
         $this->assertEquals('405', $flattened->getStatusCode());
 
         $flattened = FlattenException::create(new AccessDeniedHttpException());
@@ -96,23 +96,23 @@ class FlattenExceptionTest extends TestCase
 
     public function testHeadersForHttpException()
     {
-        $flattened = FlattenException::create(new MethodNotAllowedHttpException(array('POST')));
-        $this->assertEquals(array('Allow' => 'POST'), $flattened->getHeaders());
+        $flattened = FlattenException::create(new MethodNotAllowedHttpException(['POST']));
+        $this->assertEquals(['Allow' => 'POST'], $flattened->getHeaders());
 
         $flattened = FlattenException::create(new UnauthorizedHttpException('Basic realm="My Realm"'));
-        $this->assertEquals(array('WWW-Authenticate' => 'Basic realm="My Realm"'), $flattened->getHeaders());
+        $this->assertEquals(['WWW-Authenticate' => 'Basic realm="My Realm"'], $flattened->getHeaders());
 
         $flattened = FlattenException::create(new ServiceUnavailableHttpException('Fri, 31 Dec 1999 23:59:59 GMT'));
-        $this->assertEquals(array('Retry-After' => 'Fri, 31 Dec 1999 23:59:59 GMT'), $flattened->getHeaders());
+        $this->assertEquals(['Retry-After' => 'Fri, 31 Dec 1999 23:59:59 GMT'], $flattened->getHeaders());
 
         $flattened = FlattenException::create(new ServiceUnavailableHttpException(120));
-        $this->assertEquals(array('Retry-After' => 120), $flattened->getHeaders());
+        $this->assertEquals(['Retry-After' => 120], $flattened->getHeaders());
 
         $flattened = FlattenException::create(new TooManyRequestsHttpException('Fri, 31 Dec 1999 23:59:59 GMT'));
-        $this->assertEquals(array('Retry-After' => 'Fri, 31 Dec 1999 23:59:59 GMT'), $flattened->getHeaders());
+        $this->assertEquals(['Retry-After' => 'Fri, 31 Dec 1999 23:59:59 GMT'], $flattened->getHeaders());
 
         $flattened = FlattenException::create(new TooManyRequestsHttpException(120));
-        $this->assertEquals(array('Retry-After' => 120), $flattened->getHeaders());
+        $this->assertEquals(['Retry-After' => 120], $flattened->getHeaders());
     }
 
     /**
@@ -162,7 +162,7 @@ class FlattenExceptionTest extends TestCase
 
         $this->assertSame($flattened2, $flattened->getPrevious());
 
-        $this->assertSame(array($flattened2), $flattened->getAllPrevious());
+        $this->assertSame([$flattened2], $flattened->getAllPrevious());
     }
 
     public function testPreviousError()
@@ -200,18 +200,18 @@ class FlattenExceptionTest extends TestCase
     public function testToArray(\Throwable $exception, string $expectedClass)
     {
         $flattened = FlattenException::createFromThrowable($exception);
-        $flattened->setTrace(array(), 'foo.php', 123);
+        $flattened->setTrace([], 'foo.php', 123);
 
-        $this->assertEquals(array(
-            array(
+        $this->assertEquals([
+            [
                 'message' => 'test',
                 'class' => $expectedClass,
-                'trace' => array(array(
+                'trace' => [[
                     'namespace' => '', 'short_class' => '', 'class' => '', 'type' => '', 'function' => '', 'file' => 'foo.php', 'line' => 123,
-                    'args' => array(),
-                )),
-            ),
-        ), $flattened->toArray());
+                    'args' => [],
+                ]],
+            ],
+        ], $flattened->toArray());
     }
 
     public function testCreate()
@@ -229,10 +229,10 @@ class FlattenExceptionTest extends TestCase
 
     public function flattenDataProvider()
     {
-        return array(
-            array(new \Exception('test', 123), 'Exception'),
-            array(new \Error('test', 123), 'Error'),
-        );
+        return [
+            [new \Exception('test', 123), 'Exception'],
+            [new \Error('test', 123), 'Error'],
+        ];
     }
 
     public function testArguments()
@@ -242,15 +242,15 @@ class FlattenExceptionTest extends TestCase
 
         $incomplete = unserialize('O:14:"BogusTestClass":0:{}');
 
-        $exception = $this->createException(array(
-            (object) array('foo' => 1),
+        $exception = $this->createException([
+            (object) ['foo' => 1],
             new NotFoundHttpException(),
             $incomplete,
             $dh,
             $fh,
             function () {},
-            array(1, 2),
-            array('foo' => 123),
+            [1, 2],
+            ['foo' => 123],
             null,
             true,
             false,
@@ -260,7 +260,7 @@ class FlattenExceptionTest extends TestCase
             '',
             INF,
             NAN,
-        ));
+        ]);
 
         $flattened = FlattenException::create($exception);
         $trace = $flattened->getTrace();
@@ -271,26 +271,26 @@ class FlattenExceptionTest extends TestCase
         fclose($fh);
 
         $i = 0;
-        $this->assertSame(array('object', 'stdClass'), $array[$i++]);
-        $this->assertSame(array('object', 'Symfony\Component\HttpKernel\Exception\NotFoundHttpException'), $array[$i++]);
-        $this->assertSame(array('incomplete-object', 'BogusTestClass'), $array[$i++]);
-        $this->assertSame(array('resource', 'stream'), $array[$i++]);
-        $this->assertSame(array('resource', 'stream'), $array[$i++]);
+        $this->assertSame(['object', 'stdClass'], $array[$i++]);
+        $this->assertSame(['object', 'Symfony\Component\HttpKernel\Exception\NotFoundHttpException'], $array[$i++]);
+        $this->assertSame(['incomplete-object', 'BogusTestClass'], $array[$i++]);
+        $this->assertSame(['resource', 'stream'], $array[$i++]);
+        $this->assertSame(['resource', 'stream'], $array[$i++]);
 
         $args = $array[$i++];
         $this->assertSame($args[0], 'object');
         $this->assertTrue('Closure' === $args[1] || is_subclass_of($args[1], '\Closure'), 'Expect object class name to be Closure or a subclass of Closure.');
 
-        $this->assertSame(array('array', array(array('integer', 1), array('integer', 2))), $array[$i++]);
-        $this->assertSame(array('array', array('foo' => array('integer', 123))), $array[$i++]);
-        $this->assertSame(array('null', null), $array[$i++]);
-        $this->assertSame(array('boolean', true), $array[$i++]);
-        $this->assertSame(array('boolean', false), $array[$i++]);
-        $this->assertSame(array('integer', 0), $array[$i++]);
-        $this->assertSame(array('float', 0.0), $array[$i++]);
-        $this->assertSame(array('string', '0'), $array[$i++]);
-        $this->assertSame(array('string', ''), $array[$i++]);
-        $this->assertSame(array('float', INF), $array[$i++]);
+        $this->assertSame(['array', [['integer', 1], ['integer', 2]]], $array[$i++]);
+        $this->assertSame(['array', ['foo' => ['integer', 123]]], $array[$i++]);
+        $this->assertSame(['null', null], $array[$i++]);
+        $this->assertSame(['boolean', true], $array[$i++]);
+        $this->assertSame(['boolean', false], $array[$i++]);
+        $this->assertSame(['integer', 0], $array[$i++]);
+        $this->assertSame(['float', 0.0], $array[$i++]);
+        $this->assertSame(['string', '0'], $array[$i++]);
+        $this->assertSame(['string', ''], $array[$i++]);
+        $this->assertSame(['float', INF], $array[$i++]);
 
         // assertEquals() does not like NAN values.
         $this->assertEquals($array[$i][0], 'float');
@@ -300,7 +300,7 @@ class FlattenExceptionTest extends TestCase
     public function testRecursionInArguments()
     {
         $a = null;
-        $a = array('foo', array(2, &$a));
+        $a = ['foo', [2, &$a]];
         $exception = $this->createException($a);
 
         $flattened = FlattenException::create($exception);
@@ -310,7 +310,7 @@ class FlattenExceptionTest extends TestCase
 
     public function testTooBigArray()
     {
-        $a = array();
+        $a = [];
         for ($i = 0; $i < 20; ++$i) {
             for ($j = 0; $j < 50; ++$j) {
                 for ($k = 0; $k < 10; ++$k) {
@@ -325,7 +325,7 @@ class FlattenExceptionTest extends TestCase
         $flattened = FlattenException::create($exception);
         $trace = $flattened->getTrace();
 
-        $this->assertSame($trace[1]['args'][0], array('array', array('array', '*SKIPPED over 10000 entries*')));
+        $this->assertSame($trace[1]['args'][0], ['array', ['array', '*SKIPPED over 10000 entries*']]);
 
         $serializeTrace = serialize($trace);
 
diff --git a/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php b/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
index 6ff6a74f4f..e166136cbb 100644
--- a/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/ExceptionHandlerTest.php
@@ -62,10 +62,10 @@ class ExceptionHandlerTest extends TestCase
 
         $this->assertContains('Sorry, the page you are looking for could not be found.', $response);
 
-        $expectedHeaders = array(
-            array('HTTP/1.0 404', true, null),
-            array('Content-Type: text/html; charset=iso8859-1', true, null),
-        );
+        $expectedHeaders = [
+            ['HTTP/1.0 404', true, null],
+            ['Content-Type: text/html; charset=iso8859-1', true, null],
+        ];
 
         $this->assertSame($expectedHeaders, testHeader());
     }
@@ -75,14 +75,14 @@ class ExceptionHandlerTest extends TestCase
         $handler = new ExceptionHandler(false, 'iso8859-1');
 
         ob_start();
-        $handler->sendPhpResponse(new MethodNotAllowedHttpException(array('POST')));
+        $handler->sendPhpResponse(new MethodNotAllowedHttpException(['POST']));
         $response = ob_get_clean();
 
-        $expectedHeaders = array(
-            array('HTTP/1.0 405', true, null),
-            array('Allow: POST', false, null),
-            array('Content-Type: text/html; charset=iso8859-1', true, null),
-        );
+        $expectedHeaders = [
+            ['HTTP/1.0 405', true, null],
+            ['Allow: POST', false, null],
+            ['Content-Type: text/html; charset=iso8859-1', true, null],
+        ];
 
         $this->assertSame($expectedHeaders, testHeader());
     }
@@ -101,7 +101,7 @@ class ExceptionHandlerTest extends TestCase
     {
         $exception = new \Exception('foo');
 
-        $handler = $this->getMockBuilder('Symfony\Component\Debug\ExceptionHandler')->setMethods(array('sendPhpResponse'))->getMock();
+        $handler = $this->getMockBuilder('Symfony\Component\Debug\ExceptionHandler')->setMethods(['sendPhpResponse'])->getMock();
         $handler
             ->expects($this->exactly(2))
             ->method('sendPhpResponse');
@@ -119,7 +119,7 @@ class ExceptionHandlerTest extends TestCase
     {
         $exception = new OutOfMemoryException('foo', 0, E_ERROR, __FILE__, __LINE__);
 
-        $handler = $this->getMockBuilder('Symfony\Component\Debug\ExceptionHandler')->setMethods(array('sendPhpResponse'))->getMock();
+        $handler = $this->getMockBuilder('Symfony\Component\Debug\ExceptionHandler')->setMethods(['sendPhpResponse'])->getMock();
         $handler
             ->expects($this->once())
             ->method('sendPhpResponse');
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
index 5cdac2f12a..8e615ac640 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/ClassNotFoundFatalErrorHandlerTest.php
@@ -72,85 +72,85 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
         $autoloader = new ComposerClassLoader();
         $autoloader->add('Symfony\Component\Debug\Exception\\', realpath(__DIR__.'/../../Exception'));
 
-        $debugClassLoader = new DebugClassLoader(array($autoloader, 'loadClass'));
+        $debugClassLoader = new DebugClassLoader([$autoloader, 'loadClass']);
 
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'WhizBangFactory\' not found',
-                ),
+                ],
                 "Attempted to load class \"WhizBangFactory\" from the global namespace.\nDid you forget a \"use\" statement?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'Foo\\Bar\\WhizBangFactory\' not found',
-                ),
+                ],
                 "Attempted to load class \"WhizBangFactory\" from namespace \"Foo\\Bar\".\nDid you forget a \"use\" statement for another namespace?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'UndefinedFunctionException\' not found',
-                ),
+                ],
                 "Attempted to load class \"UndefinedFunctionException\" from the global namespace.\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'PEARClass\' not found',
-                ),
+                ],
                 "Attempted to load class \"PEARClass\" from the global namespace.\nDid you forget a \"use\" statement for \"Symfony_Component_Debug_Tests_Fixtures_PEARClass\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
-                ),
+                ],
                 "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
-                ),
+                ],
                 "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
-                array($autoloader, 'loadClass'),
-            ),
-            array(
-                array(
+                [$autoloader, 'loadClass'],
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
-                ),
+                ],
                 "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\Bar\".\nDid you forget a \"use\" statement for \"Symfony\Component\Debug\Exception\UndefinedFunctionException\"?",
-                array($debugClassLoader, 'loadClass'),
-            ),
-            array(
-                array(
+                [$debugClassLoader, 'loadClass'],
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Class \'Foo\\Bar\\UndefinedFunctionException\' not found',
-                ),
+                ],
                 "Attempted to load class \"UndefinedFunctionException\" from namespace \"Foo\\Bar\".\nDid you forget a \"use\" statement for another namespace?",
                 function ($className) { /* do nothing here */ },
-            ),
-        );
+            ],
+        ];
     }
 
     public function testCannotRedeclareClass()
@@ -161,12 +161,12 @@ class ClassNotFoundFatalErrorHandlerTest extends TestCase
 
         require_once __DIR__.'/../FIXTURES2/REQUIREDTWICE.PHP';
 
-        $error = array(
+        $error = [
             'type' => 1,
             'line' => 12,
             'file' => 'foo.php',
             'message' => 'Class \'Foo\\Bar\\RequiredTwice\' not found',
-        );
+        ];
 
         $handler = new ClassNotFoundFatalErrorHandler();
         $exception = $handler->handleError($error, new FatalErrorException('', 0, $error['type'], $error['file'], $error['line']));
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
index 60153fc5ec..de9994e447 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedFunctionFatalErrorHandlerTest.php
@@ -35,44 +35,44 @@ class UndefinedFunctionFatalErrorHandlerTest extends TestCase
 
     public function provideUndefinedFunctionData()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined function test_namespaced_function()',
-                ),
+                ],
                 "Attempted to call function \"test_namespaced_function\" from the global namespace.\nDid you mean to call \"\\symfony\\component\\debug\\tests\\fatalerrorhandler\\test_namespaced_function\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined function Foo\\Bar\\Baz\\test_namespaced_function()',
-                ),
+                ],
                 "Attempted to call function \"test_namespaced_function\" from namespace \"Foo\\Bar\\Baz\".\nDid you mean to call \"\\symfony\\component\\debug\\tests\\fatalerrorhandler\\test_namespaced_function\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined function foo()',
-                ),
+                ],
                 'Attempted to call function "foo" from the global namespace.',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined function Foo\\Bar\\Baz\\foo()',
-                ),
+                ],
                 'Attempted to call function "foo" from namespace "Foo\Bar\Baz".',
-            ),
-        );
+            ],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
index a2647f57f2..268a841351 100644
--- a/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
+++ b/src/Symfony/Component/Debug/Tests/FatalErrorHandler/UndefinedMethodFatalErrorHandlerTest.php
@@ -34,43 +34,43 @@ class UndefinedMethodFatalErrorHandlerTest extends TestCase
 
     public function provideUndefinedMethodData()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined method SplObjectStorage::what()',
-                ),
+                ],
                 'Attempted to call an undefined method named "what" of class "SplObjectStorage".',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined method SplObjectStorage::walid()',
-                ),
+                ],
                 "Attempted to call an undefined method named \"walid\" of class \"SplObjectStorage\".\nDid you mean to call \"valid\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'line' => 12,
                     'file' => 'foo.php',
                     'message' => 'Call to undefined method SplObjectStorage::offsetFet()',
-                ),
+                ],
                 "Attempted to call an undefined method named \"offsetFet\" of class \"SplObjectStorage\".\nDid you mean to call e.g. \"offsetGet\", \"offsetSet\" or \"offsetUnset\"?",
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'type' => 1,
                     'message' => 'Call to undefined method class@anonymous::test()',
                     'file' => '/home/possum/work/symfony/test.php',
                     'line' => 11,
-                ),
+                ],
                 'Attempted to call an undefined method named "test" of class "class@anonymous".',
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Debug/Tests/Fixtures/ToStringThrower.php b/src/Symfony/Component/Debug/Tests/Fixtures/ToStringThrower.php
index 40a5fb7f8c..24ac8926d2 100644
--- a/src/Symfony/Component/Debug/Tests/Fixtures/ToStringThrower.php
+++ b/src/Symfony/Component/Debug/Tests/Fixtures/ToStringThrower.php
@@ -18,7 +18,7 @@ class ToStringThrower
         } catch (\Exception $e) {
             // Using user_error() here is on purpose so we do not forget
             // that this alias also should work alongside with trigger_error().
-            return user_error($e, E_USER_ERROR);
+            return trigger_error($e, E_USER_ERROR);
         }
     }
 }
diff --git a/src/Symfony/Component/Debug/Tests/HeaderMock.php b/src/Symfony/Component/Debug/Tests/HeaderMock.php
index 3d8d84c5a4..d7564db485 100644
--- a/src/Symfony/Component/Debug/Tests/HeaderMock.php
+++ b/src/Symfony/Component/Debug/Tests/HeaderMock.php
@@ -25,11 +25,11 @@ namespace Symfony\Component\Debug\Tests;
 
 function testHeader()
 {
-    static $headers = array();
+    static $headers = [];
 
     if (!$h = \func_get_args()) {
         $h = $headers;
-        $headers = array();
+        $headers = [];
 
         return $h;
     }
diff --git a/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt b/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
index 3f45595430..b743d93ad7 100644
--- a/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
+++ b/src/Symfony/Component/Debug/Tests/phpt/exception_rethrown.phpt
@@ -14,7 +14,7 @@ require $vendor.'/vendor/autoload.php';
 if (true) {
     class TestLogger extends \Psr\Log\AbstractLogger
     {
-        public function log($level, $message, array $context = array())
+        public function log($level, $message, array $context = [])
         {
             echo $message, "\n";
         }
diff --git a/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt b/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
index 2b74e5c685..b3f0e0eb09 100644
--- a/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
+++ b/src/Symfony/Component/Debug/Tests/phpt/fatal_with_nested_handlers.phpt
@@ -17,9 +17,9 @@ ini_set('display_errors', 0);
 $eHandler = set_error_handler('var_dump');
 $xHandler = set_exception_handler('var_dump');
 
-var_dump(array(
+var_dump([
     $eHandler[0] === $xHandler[0] ? 'Error and exception handlers do match' : 'Error and exception handlers are different',
-));
+]);
 
 $eHandler[0]->setExceptionHandler('print_r');
 
diff --git a/src/Symfony/Component/DependencyInjection/Argument/BoundArgument.php b/src/Symfony/Component/DependencyInjection/Argument/BoundArgument.php
index 332f5354fa..b2fc28d8d5 100644
--- a/src/Symfony/Component/DependencyInjection/Argument/BoundArgument.php
+++ b/src/Symfony/Component/DependencyInjection/Argument/BoundArgument.php
@@ -37,7 +37,7 @@ final class BoundArgument implements ArgumentInterface
      */
     public function getValues()
     {
-        return array($this->value, $this->identifier, $this->used);
+        return [$this->value, $this->identifier, $this->used];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Argument/ServiceClosureArgument.php b/src/Symfony/Component/DependencyInjection/Argument/ServiceClosureArgument.php
index 2fec5d26d0..6331affa48 100644
--- a/src/Symfony/Component/DependencyInjection/Argument/ServiceClosureArgument.php
+++ b/src/Symfony/Component/DependencyInjection/Argument/ServiceClosureArgument.php
@@ -25,7 +25,7 @@ class ServiceClosureArgument implements ArgumentInterface
 
     public function __construct(Reference $reference)
     {
-        $this->values = array($reference);
+        $this->values = [$reference];
     }
 
     /**
@@ -41,7 +41,7 @@ class ServiceClosureArgument implements ArgumentInterface
      */
     public function setValues(array $values)
     {
-        if (array(0) !== array_keys($values) || !($values[0] instanceof Reference || null === $values[0])) {
+        if ([0] !== array_keys($values) || !($values[0] instanceof Reference || null === $values[0])) {
             throw new InvalidArgumentException('A ServiceClosureArgument must hold one and only one Reference.');
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Argument/TaggedIteratorArgument.php b/src/Symfony/Component/DependencyInjection/Argument/TaggedIteratorArgument.php
index 3a6fab8b99..f3b3621d89 100644
--- a/src/Symfony/Component/DependencyInjection/Argument/TaggedIteratorArgument.php
+++ b/src/Symfony/Component/DependencyInjection/Argument/TaggedIteratorArgument.php
@@ -22,7 +22,7 @@ class TaggedIteratorArgument extends IteratorArgument
 
     public function __construct(string $tag)
     {
-        parent::__construct(array());
+        parent::__construct([]);
 
         $this->tag = $tag;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AbstractRecursivePass.php b/src/Symfony/Component/DependencyInjection/Compiler/AbstractRecursivePass.php
index d6bfc0c648..89857f78a8 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/AbstractRecursivePass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/AbstractRecursivePass.php
@@ -86,7 +86,7 @@ abstract class AbstractRecursivePass implements CompilerPassInterface
         } elseif ($value instanceof ArgumentInterface) {
             $value->setValues($this->processValue($value->getValues()));
         } elseif ($value instanceof Expression && $this->processExpressions) {
-            $this->getExpressionLanguage()->compile((string) $value, array('this' => 'container'));
+            $this->getExpressionLanguage()->compile((string) $value, ['this' => 'container']);
         } elseif ($value instanceof Definition) {
             $value->setArguments($this->processValue($value->getArguments()));
             $value->setProperties($this->processValue($value->getProperties()));
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
index adaded42fa..2dafb53789 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/AnalyzeServiceReferencesPass.php
@@ -78,7 +78,7 @@ class AnalyzeServiceReferencesPass extends AbstractRecursivePass implements Repe
         try {
             parent::process($container);
         } finally {
-            $this->aliases = $this->definitions = array();
+            $this->aliases = $this->definitions = [];
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php b/src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php
index d8269e13b8..57614119fc 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php
@@ -116,7 +116,7 @@ class AutowirePass extends AbstractRecursivePass
         }
 
         if ($constructor) {
-            array_unshift($this->methodCalls, array($constructor, $value->getArguments()));
+            array_unshift($this->methodCalls, [$constructor, $value->getArguments()]);
         }
 
         $this->methodCalls = $this->autowireCalls($reflectionClass, $isRoot);
@@ -307,8 +307,8 @@ class AutowirePass extends AbstractRecursivePass
      */
     private function populateAvailableTypes(ContainerBuilder $container)
     {
-        $this->types = array();
-        $this->ambiguousServiceTypes = array();
+        $this->types = [];
+        $this->ambiguousServiceTypes = [];
 
         foreach ($container->getDefinitions() as $id => $definition) {
             $this->populateAvailableType($container, $id, $definition);
@@ -359,7 +359,7 @@ class AutowirePass extends AbstractRecursivePass
 
         // keep an array of all services matching this type
         if (!isset($this->ambiguousServiceTypes[$type])) {
-            $this->ambiguousServiceTypes[$type] = array($this->types[$type]);
+            $this->ambiguousServiceTypes[$type] = [$this->types[$type]];
             unset($this->types[$type]);
         }
         $this->ambiguousServiceTypes[$type][] = $id;
@@ -437,7 +437,7 @@ class AutowirePass extends AbstractRecursivePass
 
     private function getAliasesSuggestionForType(ContainerBuilder $container, $type, $extraContext = null)
     {
-        $aliases = array();
+        $aliases = [];
         foreach (class_parents($type) + class_implements($type) as $parent) {
             if ($container->has($parent) && !$container->findDefinition($parent)->isAbstract()) {
                 $aliases[] = $parent;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AutowireRequiredMethodsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/AutowireRequiredMethodsPass.php
index 6c744f88f6..efb9df7b94 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/AutowireRequiredMethodsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/AutowireRequiredMethodsPass.php
@@ -34,7 +34,7 @@ class AutowireRequiredMethodsPass extends AbstractRecursivePass
             return $value;
         }
 
-        $alreadyCalledMethods = array();
+        $alreadyCalledMethods = [];
 
         foreach ($value->getMethodCalls() as list($method)) {
             $alreadyCalledMethods[strtolower($method)] = true;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
index ac7866b2ba..55d911c4f3 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckCircularReferencesPass.php
@@ -36,9 +36,9 @@ class CheckCircularReferencesPass implements CompilerPassInterface
     {
         $graph = $container->getCompiler()->getServiceReferenceGraph();
 
-        $this->checkedNodes = array();
+        $this->checkedNodes = [];
         foreach ($graph->getNodes() as $id => $node) {
-            $this->currentPath = array($id);
+            $this->currentPath = [$id];
 
             $this->checkOutEdges($node->getOutEdges());
         }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckDefinitionValidityPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckDefinitionValidityPass.php
index a3ada1ddcf..39b183fe64 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckDefinitionValidityPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckDefinitionValidityPass.php
@@ -83,7 +83,7 @@ class CheckDefinitionValidityPass implements CompilerPassInterface
             if ($definition->isPublic() && !$definition->isPrivate()) {
                 $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
                 if (null !== $usedEnvs) {
-                    throw new EnvParameterException(array($resolvedId), null, 'A service name ("%s") cannot contain dynamic values.');
+                    throw new EnvParameterException([$resolvedId], null, 'A service name ("%s") cannot contain dynamic values.');
                 }
             }
         }
@@ -92,7 +92,7 @@ class CheckDefinitionValidityPass implements CompilerPassInterface
             if ($alias->isPublic() && !$alias->isPrivate()) {
                 $resolvedId = $container->resolveEnvPlaceholders($id, null, $usedEnvs);
                 if (null !== $usedEnvs) {
-                    throw new EnvParameterException(array($resolvedId), null, 'An alias name ("%s") cannot contain dynamic values.');
+                    throw new EnvParameterException([$resolvedId], null, 'An alias name ("%s") cannot contain dynamic values.');
                 }
             }
         }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php b/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
index e987b1ad31..eef71587cd 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
@@ -23,14 +23,14 @@ use Symfony\Component\DependencyInjection\Reference;
  */
 class CheckExceptionOnInvalidReferenceBehaviorPass extends AbstractRecursivePass
 {
-    private $serviceLocatorContextIds = array();
+    private $serviceLocatorContextIds = [];
 
     /**
      * {@inheritdoc}
      */
     public function process(ContainerBuilder $container)
     {
-        $this->serviceLocatorContextIds = array();
+        $this->serviceLocatorContextIds = [];
         foreach ($container->findTaggedServiceIds('container.service_locator_context') as $id => $tags) {
             $this->serviceLocatorContextIds[$id] = $tags[0]['id'];
             $container->getDefinition($id)->clearTag('container.service_locator_context');
@@ -39,7 +39,7 @@ class CheckExceptionOnInvalidReferenceBehaviorPass extends AbstractRecursivePass
         try {
             return parent::process($container);
         } finally {
-            $this->serviceLocatorContextIds = array();
+            $this->serviceLocatorContextIds = [];
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/Compiler.php b/src/Symfony/Component/DependencyInjection/Compiler/Compiler.php
index b102e70641..58c6e81a04 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/Compiler.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/Compiler.php
@@ -22,7 +22,7 @@ use Symfony\Component\DependencyInjection\Exception\EnvParameterException;
 class Compiler
 {
     private $passConfig;
-    private $log = array();
+    private $log = [];
     private $serviceReferenceGraph;
 
     public function __construct()
@@ -95,7 +95,7 @@ class Compiler
                 $pass->process($container);
             }
         } catch (\Exception $e) {
-            $usedEnvs = array();
+            $usedEnvs = [];
             $prev = $e;
 
             do {
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php b/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
index bd3b3af21e..f49e8cf949 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/DecoratorServicePass.php
@@ -32,9 +32,9 @@ class DecoratorServicePass implements CompilerPassInterface
             if (!$decorated = $definition->getDecoratedService()) {
                 continue;
             }
-            $definitions->insert(array($id, $definition), array($decorated[2], --$order));
+            $definitions->insert([$id, $definition], [$decorated[2], --$order]);
         }
-        $decoratingDefinitions = array();
+        $decoratingDefinitions = [];
 
         foreach ($definitions as list($id, $definition)) {
             list($inner, $renamedId) = $definition->getDecoratedService();
@@ -65,7 +65,7 @@ class DecoratorServicePass implements CompilerPassInterface
             if (isset($decoratingDefinitions[$inner])) {
                 $decoratingDefinition = $decoratingDefinitions[$inner];
                 $definition->setTags(array_merge($decoratingDefinition->getTags(), $definition->getTags()));
-                $decoratingDefinition->setTags(array());
+                $decoratingDefinition->setTags([]);
                 $decoratingDefinitions[$inner] = $definition;
             }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
index 0e074b9944..9168ff0910 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/InlineServiceDefinitionsPass.php
@@ -26,10 +26,10 @@ class InlineServiceDefinitionsPass extends AbstractRecursivePass implements Repe
 {
     private $analyzingPass;
     private $repeatedPass;
-    private $cloningIds = array();
-    private $connectedIds = array();
-    private $notInlinedIds = array();
-    private $inlinedIds = array();
+    private $cloningIds = [];
+    private $connectedIds = [];
+    private $notInlinedIds = [];
+    private $inlinedIds = [];
     private $graph;
 
     public function __construct(AnalyzeServiceReferencesPass $analyzingPass = null)
@@ -68,7 +68,7 @@ class InlineServiceDefinitionsPass extends AbstractRecursivePass implements Repe
                 }
                 $this->graph = $analyzedContainer->getCompiler()->getServiceReferenceGraph();
                 $notInlinedIds = $this->notInlinedIds;
-                $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = array();
+                $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = [];
 
                 foreach ($analyzedContainer->getDefinitions() as $id => $definition) {
                     if (!$this->graph->hasNode($id)) {
@@ -96,7 +96,7 @@ class InlineServiceDefinitionsPass extends AbstractRecursivePass implements Repe
             }
         } finally {
             $this->container = null;
-            $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = array();
+            $this->connectedIds = $this->notInlinedIds = $this->inlinedIds = [];
             $this->graph = null;
         }
     }
@@ -193,7 +193,7 @@ class InlineServiceDefinitionsPass extends AbstractRecursivePass implements Repe
         }
         $this->connectedIds[$id] = true;
 
-        $srcIds = array();
+        $srcIds = [];
         $srcCount = 0;
         $isReferencedByConstructor = false;
         foreach ($this->graph->getNode($id)->getInEdges() as $edge) {
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php b/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php
index 29063216ae..822dfe795c 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/MergeExtensionConfigurationPass.php
@@ -119,7 +119,7 @@ class MergeExtensionConfigurationParameterBag extends EnvPlaceholderParameterBag
             // Extension::processConfiguration() wasn't called, we cannot know how configs were merged
             return;
         }
-        $this->processedEnvPlaceholders = array();
+        $this->processedEnvPlaceholders = [];
 
         // serialize config and container to catch env vars nested in object graphs
         $config = serialize($config).serialize($container->getDefinitions()).serialize($container->getAliases()).serialize($container->getParameterBag()->all());
@@ -144,7 +144,7 @@ class MergeExtensionConfigurationParameterBag extends EnvPlaceholderParameterBag
 
     public function getUnusedEnvPlaceholders(): array
     {
-        return null === $this->processedEnvPlaceholders ? array() : array_diff_key(parent::getEnvPlaceholders(), $this->processedEnvPlaceholders);
+        return null === $this->processedEnvPlaceholders ? [] : array_diff_key(parent::getEnvPlaceholders(), $this->processedEnvPlaceholders);
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/PassConfig.php b/src/Symfony/Component/DependencyInjection/Compiler/PassConfig.php
index e5fb5b212f..e39cd4981a 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/PassConfig.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/PassConfig.php
@@ -29,9 +29,9 @@ class PassConfig
     const TYPE_REMOVE = 'removing';
 
     private $mergePass;
-    private $afterRemovingPasses = array();
-    private $beforeOptimizationPasses = array();
-    private $beforeRemovingPasses = array();
+    private $afterRemovingPasses = [];
+    private $beforeOptimizationPasses = [];
+    private $beforeRemovingPasses = [];
     private $optimizationPasses;
     private $removingPasses;
 
@@ -39,16 +39,16 @@ class PassConfig
     {
         $this->mergePass = new MergeExtensionConfigurationPass();
 
-        $this->beforeOptimizationPasses = array(
-            100 => array(
+        $this->beforeOptimizationPasses = [
+            100 => [
                 new ResolveClassPass(),
                 new ResolveInstanceofConditionalsPass(),
                 new RegisterEnvVarProcessorsPass(),
-            ),
-            -1000 => array(new ExtensionCompilerPass()),
-        );
+            ],
+            -1000 => [new ExtensionCompilerPass()],
+        ];
 
-        $this->optimizationPasses = array(array(
+        $this->optimizationPasses = [[
             new ValidateEnvPlaceholdersPass(),
             new ResolveChildDefinitionsPass(),
             new ServiceLocatorTagPass(),
@@ -69,15 +69,15 @@ class PassConfig
             new CheckCircularReferencesPass(),
             new CheckReferenceValidityPass(),
             new CheckArgumentsValidityPass(false),
-        ));
+        ]];
 
-        $this->beforeRemovingPasses = array(
-            -100 => array(
+        $this->beforeRemovingPasses = [
+            -100 => [
                 new ResolvePrivatesPass(),
-            ),
-        );
+            ],
+        ];
 
-        $this->removingPasses = array(array(
+        $this->removingPasses = [[
             new RemovePrivateAliasesPass(),
             new ReplaceAliasByActualDefinitionPass(),
             new RemoveAbstractDefinitionsPass(),
@@ -87,7 +87,7 @@ class PassConfig
             new DefinitionErrorExceptionPass(),
             new CheckExceptionOnInvalidReferenceBehaviorPass(),
             new ResolveHotPathPass(),
-        ));
+        ]];
     }
 
     /**
@@ -98,7 +98,7 @@ class PassConfig
     public function getPasses()
     {
         return array_merge(
-            array($this->mergePass),
+            [$this->mergePass],
             $this->getBeforeOptimizationPasses(),
             $this->getOptimizationPasses(),
             $this->getBeforeRemovingPasses(),
@@ -126,7 +126,7 @@ class PassConfig
         $passes = &$this->$property;
 
         if (!isset($passes[$priority])) {
-            $passes[$priority] = array();
+            $passes[$priority] = [];
         }
         $passes[$priority][] = $pass;
     }
@@ -203,7 +203,7 @@ class PassConfig
      */
     public function setAfterRemovingPasses(array $passes)
     {
-        $this->afterRemovingPasses = array($passes);
+        $this->afterRemovingPasses = [$passes];
     }
 
     /**
@@ -213,7 +213,7 @@ class PassConfig
      */
     public function setBeforeOptimizationPasses(array $passes)
     {
-        $this->beforeOptimizationPasses = array($passes);
+        $this->beforeOptimizationPasses = [$passes];
     }
 
     /**
@@ -223,7 +223,7 @@ class PassConfig
      */
     public function setBeforeRemovingPasses(array $passes)
     {
-        $this->beforeRemovingPasses = array($passes);
+        $this->beforeRemovingPasses = [$passes];
     }
 
     /**
@@ -233,7 +233,7 @@ class PassConfig
      */
     public function setOptimizationPasses(array $passes)
     {
-        $this->optimizationPasses = array($passes);
+        $this->optimizationPasses = [$passes];
     }
 
     /**
@@ -243,7 +243,7 @@ class PassConfig
      */
     public function setRemovingPasses(array $passes)
     {
-        $this->removingPasses = array($passes);
+        $this->removingPasses = [$passes];
     }
 
     /**
@@ -256,7 +256,7 @@ class PassConfig
     private function sortPasses(array $passes)
     {
         if (0 === \count($passes)) {
-            return array();
+            return [];
         }
 
         krsort($passes);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/PriorityTaggedServiceTrait.php b/src/Symfony/Component/DependencyInjection/Compiler/PriorityTaggedServiceTrait.php
index 4f440af7f9..adb99f0d54 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/PriorityTaggedServiceTrait.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/PriorityTaggedServiceTrait.php
@@ -38,7 +38,7 @@ trait PriorityTaggedServiceTrait
      */
     private function findAndSortTaggedServices($tagName, ContainerBuilder $container)
     {
-        $services = array();
+        $services = [];
 
         foreach ($container->findTaggedServiceIds($tagName, true) as $serviceId => $attributes) {
             $priority = isset($attributes[0]['priority']) ? $attributes[0]['priority'] : 0;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/RegisterEnvVarProcessorsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/RegisterEnvVarProcessorsPass.php
index 297f806286..852e7ca44a 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/RegisterEnvVarProcessorsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/RegisterEnvVarProcessorsPass.php
@@ -25,13 +25,13 @@ use Symfony\Component\DependencyInjection\Reference;
  */
 class RegisterEnvVarProcessorsPass implements CompilerPassInterface
 {
-    private static $allowedTypes = array('array', 'bool', 'float', 'int', 'string');
+    private static $allowedTypes = ['array', 'bool', 'float', 'int', 'string'];
 
     public function process(ContainerBuilder $container)
     {
         $bag = $container->getParameterBag();
-        $types = array();
-        $processors = array();
+        $types = [];
+        $processors = [];
         foreach ($container->findTaggedServiceIds('container.env_var_processor') as $id => $tags) {
             if (!$r = $container->getReflectionClass($class = $container->getDefinition($id)->getClass())) {
                 throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/RegisterServiceSubscribersPass.php b/src/Symfony/Component/DependencyInjection/Compiler/RegisterServiceSubscribersPass.php
index 848a5a712c..8c34ce4182 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/RegisterServiceSubscribersPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/RegisterServiceSubscribersPass.php
@@ -31,7 +31,7 @@ class RegisterServiceSubscribersPass extends AbstractRecursivePass
             return parent::processValue($value, $isRoot);
         }
 
-        $serviceMap = array();
+        $serviceMap = [];
         $autowire = $value->isAutowired();
 
         foreach ($value->getTag('container.service_subscriber') as $attributes) {
@@ -40,7 +40,7 @@ class RegisterServiceSubscribersPass extends AbstractRecursivePass
                 continue;
             }
             ksort($attributes);
-            if (array() !== array_diff(array_keys($attributes), array('id', 'key'))) {
+            if ([] !== array_diff(array_keys($attributes), ['id', 'key'])) {
                 throw new InvalidArgumentException(sprintf('The "container.service_subscriber" tag accepts only the "key" and "id" attributes, "%s" given for service "%s".', implode('", "', array_keys($attributes)), $this->currentId));
             }
             if (!array_key_exists('id', $attributes)) {
@@ -64,7 +64,7 @@ class RegisterServiceSubscribersPass extends AbstractRecursivePass
         }
         $class = $r->name;
 
-        $subscriberMap = array();
+        $subscriberMap = [];
 
         foreach ($class::getSubscribedServices() as $key => $type) {
             if (!\is_string($type) || !preg_match('/^\??[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+$/', $type)) {
@@ -105,7 +105,7 @@ class RegisterServiceSubscribersPass extends AbstractRecursivePass
             throw new InvalidArgumentException(sprintf('Service %s not exist in the map returned by "%s::getSubscribedServices()" for service "%s".', $message, $class, $this->currentId));
         }
 
-        $value->addTag('container.service_subscriber.locator', array('id' => (string) ServiceLocatorTagPass::register($this->container, $subscriberMap, $this->currentId)));
+        $value->addTag('container.service_subscriber.locator', ['id' => (string) ServiceLocatorTagPass::register($this->container, $subscriberMap, $this->currentId)]);
 
         return parent::processValue($value);
     }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
index dddc13e667..6d1bbbffe9 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/RemoveUnusedDefinitionsPass.php
@@ -22,7 +22,7 @@ use Symfony\Component\DependencyInjection\Reference;
  */
 class RemoveUnusedDefinitionsPass extends AbstractRecursivePass implements RepeatablePassInterface
 {
-    private $connectedIds = array();
+    private $connectedIds = [];
 
     /**
      * {@inheritdoc}
@@ -40,7 +40,7 @@ class RemoveUnusedDefinitionsPass extends AbstractRecursivePass implements Repea
         try {
             $this->enableExpressionProcessing();
             $this->container = $container;
-            $connectedIds = array();
+            $connectedIds = [];
             $aliases = $container->getAliases();
 
             foreach ($aliases as $id => $alias) {
@@ -58,7 +58,7 @@ class RemoveUnusedDefinitionsPass extends AbstractRecursivePass implements Repea
 
             while ($this->connectedIds) {
                 $ids = $this->connectedIds;
-                $this->connectedIds = array();
+                $this->connectedIds = [];
                 foreach ($ids as $id) {
                     if (!isset($connectedIds[$id]) && $container->hasDefinition($id)) {
                         $connectedIds[$id] = true;
@@ -76,7 +76,7 @@ class RemoveUnusedDefinitionsPass extends AbstractRecursivePass implements Repea
             }
         } finally {
             $this->container = null;
-            $this->connectedIds = array();
+            $this->connectedIds = [];
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
index c9f29686e1..9981096361 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ReplaceAliasByActualDefinitionPass.php
@@ -34,8 +34,8 @@ class ReplaceAliasByActualDefinitionPass extends AbstractRecursivePass
     public function process(ContainerBuilder $container)
     {
         // First collect all alias targets that need to be replaced
-        $seenAliasTargets = array();
-        $replacements = array();
+        $seenAliasTargets = [];
+        $replacements = [];
         foreach ($container->getAliases() as $definitionId => $target) {
             $targetId = (string) $target;
             // Special case: leave this target alone
@@ -56,7 +56,7 @@ class ReplaceAliasByActualDefinitionPass extends AbstractRecursivePass
                 $definition = $container->getDefinition($targetId);
             } catch (ServiceNotFoundException $e) {
                 if ('' !== $e->getId() && '@' === $e->getId()[0]) {
-                    throw new ServiceNotFoundException($e->getId(), $e->getSourceId(), null, array(substr($e->getId(), 1)));
+                    throw new ServiceNotFoundException($e->getId(), $e->getSourceId(), null, [substr($e->getId(), 1)]);
                 }
 
                 throw $e;
@@ -74,7 +74,7 @@ class ReplaceAliasByActualDefinitionPass extends AbstractRecursivePass
         $this->replacements = $replacements;
 
         parent::process($container);
-        $this->replacements = array();
+        $this->replacements = [];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
index c67b4a06e0..cf7d96fceb 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php
@@ -25,9 +25,9 @@ use Symfony\Component\DependencyInjection\TypedReference;
  */
 class ResolveBindingsPass extends AbstractRecursivePass
 {
-    private $usedBindings = array();
-    private $unusedBindings = array();
-    private $errorMessages = array();
+    private $usedBindings = [];
+    private $unusedBindings = [];
+    private $errorMessages = [];
 
     /**
      * {@inheritdoc}
@@ -48,9 +48,9 @@ class ResolveBindingsPass extends AbstractRecursivePass
                 throw new InvalidArgumentException($message);
             }
         } finally {
-            $this->usedBindings = array();
-            $this->unusedBindings = array();
-            $this->errorMessages = array();
+            $this->usedBindings = [];
+            $this->unusedBindings = [];
+            $this->errorMessages = [];
         }
     }
 
@@ -80,7 +80,7 @@ class ResolveBindingsPass extends AbstractRecursivePass
                 $this->usedBindings[$bindingId] = true;
                 unset($this->unusedBindings[$bindingId]);
             } elseif (!isset($this->usedBindings[$bindingId])) {
-                $this->unusedBindings[$bindingId] = array($key, $this->currentId);
+                $this->unusedBindings[$bindingId] = [$key, $this->currentId];
             }
 
             if (preg_match('/^(?:(?:array|bool|float|int|string) )?\$/', $key)) {
@@ -100,7 +100,7 @@ class ResolveBindingsPass extends AbstractRecursivePass
 
         try {
             if ($constructor = $this->getConstructor($value, false)) {
-                $calls[] = array($constructor, $value->getArguments());
+                $calls[] = [$constructor, $value->getArguments()];
             }
         } catch (RuntimeException $e) {
             $this->errorMessages[] = $e->getMessage();
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
index f5ec06eb1a..b641b357d5 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveChildDefinitionsPass.php
@@ -39,7 +39,7 @@ class ResolveChildDefinitionsPass extends AbstractRecursivePass
             $value = $this->container->getDefinition($this->currentId);
         }
         if ($value instanceof ChildDefinition) {
-            $this->currentPath = array();
+            $this->currentPath = [];
             $value = $this->resolveDefinition($value);
             if ($isRoot) {
                 $this->container->setDefinition($this->currentId, $value);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveHotPathPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveHotPathPass.php
index 38e96d06f1..5def580589 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveHotPathPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveHotPathPass.php
@@ -24,7 +24,7 @@ use Symfony\Component\DependencyInjection\Reference;
 class ResolveHotPathPass extends AbstractRecursivePass
 {
     private $tagName;
-    private $resolvedIds = array();
+    private $resolvedIds = [];
 
     public function __construct($tagName = 'container.hot_path')
     {
@@ -40,7 +40,7 @@ class ResolveHotPathPass extends AbstractRecursivePass
             parent::process($container);
             $container->getDefinition('service_container')->clearTag($this->tagName);
         } finally {
-            $this->resolvedIds = array();
+            $this->resolvedIds = [];
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveInstanceofConditionalsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveInstanceofConditionalsPass.php
index cc9b0dd01a..02021c8bc5 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveInstanceofConditionalsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveInstanceofConditionalsPass.php
@@ -47,7 +47,7 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
     private function processDefinition(ContainerBuilder $container, $id, Definition $definition)
     {
         $instanceofConditionals = $definition->getInstanceofConditionals();
-        $autoconfiguredInstanceof = $definition->isAutoconfigured() ? $container->getAutoconfiguredInstanceof() : array();
+        $autoconfiguredInstanceof = $definition->isAutoconfigured() ? $container->getAutoconfiguredInstanceof() : [];
         if (!$instanceofConditionals && !$autoconfiguredInstanceof) {
             return $definition;
         }
@@ -58,11 +58,11 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
 
         $conditionals = $this->mergeConditionals($autoconfiguredInstanceof, $instanceofConditionals, $container);
 
-        $definition->setInstanceofConditionals(array());
+        $definition->setInstanceofConditionals([]);
         $parent = $shared = null;
-        $instanceofTags = array();
-        $instanceofCalls = array();
-        $instanceofBindings = array();
+        $instanceofTags = [];
+        $instanceofCalls = [];
+        $instanceofBindings = [];
 
         foreach ($conditionals as $interface => $instanceofDefs) {
             if ($interface !== $class && (!$container->getReflectionClass($class, false))) {
@@ -86,9 +86,9 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
                     $instanceofCalls[] = $methodCall;
                 }
 
-                $instanceofDef->setTags(array());
-                $instanceofDef->setMethodCalls(array());
-                $instanceofDef->setBindings(array());
+                $instanceofDef->setTags([]);
+                $instanceofDef->setMethodCalls([]);
+                $instanceofDef->setBindings([]);
 
                 if (isset($instanceofDef->getChanges()['shared'])) {
                     $shared = $instanceofDef->isShared();
@@ -101,7 +101,7 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
             $abstract = $container->setDefinition('.abstract.instanceof.'.$id, $definition);
 
             // cast Definition to ChildDefinition
-            $definition->setBindings(array());
+            $definition->setBindings([]);
             $definition = serialize($definition);
             $definition = substr_replace($definition, '53', 2, 2);
             $definition = substr_replace($definition, 'Child', 44, 0);
@@ -130,11 +130,11 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
 
             // reset fields with "merge" behavior
             $abstract
-                ->setBindings(array())
-                ->setArguments(array())
-                ->setMethodCalls(array())
+                ->setBindings([])
+                ->setArguments([])
+                ->setMethodCalls([])
                 ->setDecoratedService(null)
-                ->setTags(array())
+                ->setTags([])
                 ->setAbstract(true);
         }
 
@@ -144,7 +144,7 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
     private function mergeConditionals(array $autoconfiguredInstanceof, array $instanceofConditionals, ContainerBuilder $container)
     {
         // make each value an array of ChildDefinition
-        $conditionals = array_map(function ($childDef) { return array($childDef); }, $autoconfiguredInstanceof);
+        $conditionals = array_map(function ($childDef) { return [$childDef]; }, $autoconfiguredInstanceof);
 
         foreach ($instanceofConditionals as $interface => $instanceofDef) {
             // make sure the interface/class exists (but don't validate automaticInstanceofConditionals)
@@ -153,7 +153,7 @@ class ResolveInstanceofConditionalsPass implements CompilerPassInterface
             }
 
             if (!isset($autoconfiguredInstanceof[$interface])) {
-                $conditionals[$interface] = array();
+                $conditionals[$interface] = [];
             }
 
             $conditionals[$interface][] = $instanceofDef;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
index b5b832c83f..70f2556df5 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveNamedArgumentsPass.php
@@ -33,12 +33,12 @@ class ResolveNamedArgumentsPass extends AbstractRecursivePass
         }
 
         $calls = $value->getMethodCalls();
-        $calls[] = array('__construct', $value->getArguments());
+        $calls[] = ['__construct', $value->getArguments()];
 
         foreach ($calls as $i => $call) {
             list($method, $arguments) = $call;
             $parameters = null;
-            $resolvedArguments = array();
+            $resolvedArguments = [];
 
             foreach ($arguments as $key => $argument) {
                 if (\is_int($key)) {
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
index de16102d46..2dec13f15d 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveParameterPlaceHoldersPass.php
@@ -42,7 +42,7 @@ class ResolveParameterPlaceHoldersPass extends AbstractRecursivePass
         try {
             parent::process($container);
 
-            $aliases = array();
+            $aliases = [];
             foreach ($container->getAliases() as $name => $target) {
                 $this->currentId = $name;
                 $aliases[$this->bag->resolveValue($name)] = $target;
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
index 73a12026ec..7777243da9 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ResolveReferencesToAliasesPass.php
@@ -55,10 +55,10 @@ class ResolveReferencesToAliasesPass extends AbstractRecursivePass
 
     private function getDefinitionId(string $id, ContainerBuilder $container): string
     {
-        $seen = array();
+        $seen = [];
         while ($container->hasAlias($id)) {
             if (isset($seen[$id])) {
-                throw new ServiceCircularReferenceException($id, array_merge(array_keys($seen), array($id)));
+                throw new ServiceCircularReferenceException($id, array_merge(array_keys($seen), [$id]));
             }
             $seen[$id] = true;
             $id = (string) $container->getAlias($id);
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
index acf8403225..e335307482 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ServiceLocatorTagPass.php
@@ -112,8 +112,8 @@ final class ServiceLocatorTagPass extends AbstractRecursivePass
             // to derivate customized instances from the prototype one.
             $container->register($id .= '.'.$callerId, ServiceLocator::class)
                 ->setPublic(false)
-                ->setFactory(array(new Reference($locatorId), 'withContext'))
-                ->addTag('container.service_locator_context', array('id' => $callerId))
+                ->setFactory([new Reference($locatorId), 'withContext'])
+                ->addTag('container.service_locator_context', ['id' => $callerId])
                 ->addArgument($callerId)
                 ->addArgument(new Reference('service_container'));
         }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
index 4e82e54861..308abc6566 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
@@ -28,7 +28,7 @@ class ServiceReferenceGraph
     /**
      * @var ServiceReferenceGraphNode[]
      */
-    private $nodes = array();
+    private $nodes = [];
 
     public function hasNode(string $id): bool
     {
@@ -67,7 +67,7 @@ class ServiceReferenceGraph
         foreach ($this->nodes as $node) {
             $node->clear();
         }
-        $this->nodes = array();
+        $this->nodes = [];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraphNode.php b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraphNode.php
index 210566f018..f0b9bcfe20 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraphNode.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraphNode.php
@@ -24,8 +24,8 @@ use Symfony\Component\DependencyInjection\Definition;
 class ServiceReferenceGraphNode
 {
     private $id;
-    private $inEdges = array();
-    private $outEdges = array();
+    private $inEdges = [];
+    private $outEdges = [];
     private $value;
 
     /**
@@ -113,6 +113,6 @@ class ServiceReferenceGraphNode
      */
     public function clear()
     {
-        $this->inEdges = $this->outEdges = array();
+        $this->inEdges = $this->outEdges = [];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ValidateEnvPlaceholdersPass.php b/src/Symfony/Component/DependencyInjection/Compiler/ValidateEnvPlaceholdersPass.php
index 2524a5dca7..1848ec4dbc 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ValidateEnvPlaceholdersPass.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ValidateEnvPlaceholdersPass.php
@@ -26,7 +26,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
  */
 class ValidateEnvPlaceholdersPass implements CompilerPassInterface
 {
-    private static $typeFixtures = array('array' => array(), 'bool' => false, 'float' => 0.0, 'int' => 0, 'string' => '');
+    private static $typeFixtures = ['array' => [], 'bool' => false, 'float' => 0.0, 'int' => 0, 'string' => ''];
 
     /**
      * {@inheritdoc}
@@ -46,14 +46,14 @@ class ValidateEnvPlaceholdersPass implements CompilerPassInterface
         $envTypes = $resolvingBag->getProvidedTypes();
         try {
             foreach ($resolvingBag->getEnvPlaceholders() + $resolvingBag->getUnusedEnvPlaceholders() as $env => $placeholders) {
-                $values = array();
+                $values = [];
                 if (false === $i = strpos($env, ':')) {
                     $default = $defaultBag->has("env($env)") ? $defaultBag->get("env($env)") : self::$typeFixtures['string'];
                     $defaultType = null !== $default ? self::getType($default) : 'string';
                     $values[$defaultType] = $default;
                 } else {
                     $prefix = substr($env, 0, $i);
-                    foreach ($envTypes[$prefix] ?? array('string') as $type) {
+                    foreach ($envTypes[$prefix] ?? ['string'] as $type) {
                         $values[$type] = self::$typeFixtures[$type] ?? null;
                     }
                 }
diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index 603c560fbb..938c0a8e3c 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -42,17 +42,17 @@ use Symfony\Contracts\Service\ResetInterface;
 class Container implements ResettableContainerInterface
 {
     protected $parameterBag;
-    protected $services = array();
-    protected $privates = array();
-    protected $fileMap = array();
-    protected $methodMap = array();
-    protected $factories = array();
-    protected $aliases = array();
-    protected $loading = array();
-    protected $resolving = array();
-    protected $syntheticIds = array();
+    protected $services = [];
+    protected $privates = [];
+    protected $fileMap = [];
+    protected $methodMap = [];
+    protected $factories = [];
+    protected $aliases = [];
+    protected $loading = [];
+    protected $resolving = [];
+    protected $syntheticIds = [];
 
-    private $envCache = array();
+    private $envCache = [];
     private $compiled = false;
     private $getEnv;
 
@@ -222,7 +222,7 @@ class Container implements ResettableContainerInterface
     {
         return $this->services[$id]
             ?? $this->services[$id = $this->aliases[$id] ?? $id]
-            ?? ('service_container' === $id ? $this : ($this->factories[$id] ?? array($this, 'make'))($id, $invalidBehavior));
+            ?? ('service_container' === $id ? $this : ($this->factories[$id] ?? [$this, 'make'])($id, $invalidBehavior));
     }
 
     /**
@@ -233,7 +233,7 @@ class Container implements ResettableContainerInterface
     private function make(string $id, int $invalidBehavior)
     {
         if (isset($this->loading[$id])) {
-            throw new ServiceCircularReferenceException($id, array_merge(array_keys($this->loading), array($id)));
+            throw new ServiceCircularReferenceException($id, array_merge(array_keys($this->loading), [$id]));
         }
 
         $this->loading[$id] = true;
@@ -257,13 +257,13 @@ class Container implements ResettableContainerInterface
                 throw new ServiceNotFoundException($id);
             }
             if (isset($this->syntheticIds[$id])) {
-                throw new ServiceNotFoundException($id, null, null, array(), sprintf('The "%s" service is synthetic, it needs to be set at boot time before it can be used.', $id));
+                throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service is synthetic, it needs to be set at boot time before it can be used.', $id));
             }
             if (isset($this->getRemovedIds()[$id])) {
-                throw new ServiceNotFoundException($id, null, null, array(), sprintf('The "%s" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.', $id));
+                throw new ServiceNotFoundException($id, null, null, [], sprintf('The "%s" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.', $id));
             }
 
-            $alternatives = array();
+            $alternatives = [];
             foreach ($this->getServiceIds() as $knownId) {
                 if ('' === $knownId || '.' === $knownId[0]) {
                     continue;
@@ -304,7 +304,7 @@ class Container implements ResettableContainerInterface
     public function reset()
     {
         $services = $this->services + $this->privates;
-        $this->services = $this->factories = $this->privates = array();
+        $this->services = $this->factories = $this->privates = [];
 
         foreach ($services as $service) {
             try {
@@ -324,7 +324,7 @@ class Container implements ResettableContainerInterface
      */
     public function getServiceIds()
     {
-        return array_unique(array_merge(array('service_container'), array_keys($this->fileMap), array_keys($this->methodMap), array_keys($this->services)));
+        return array_unique(array_merge(['service_container'], array_keys($this->fileMap), array_keys($this->methodMap), array_keys($this->services)));
     }
 
     /**
@@ -334,7 +334,7 @@ class Container implements ResettableContainerInterface
      */
     public function getRemovedIds()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -346,7 +346,7 @@ class Container implements ResettableContainerInterface
      */
     public static function camelize($id)
     {
-        return strtr(ucwords(strtr($id, array('_' => ' ', '.' => '_ ', '\\' => '_ '))), array(' ' => ''));
+        return strtr(ucwords(strtr($id, ['_' => ' ', '.' => '_ ', '\\' => '_ '])), [' ' => '']);
     }
 
     /**
@@ -358,7 +358,7 @@ class Container implements ResettableContainerInterface
      */
     public static function underscore($id)
     {
-        return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), str_replace('_', '.', $id)));
+        return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], str_replace('_', '.', $id)));
     }
 
     /**
@@ -389,7 +389,7 @@ class Container implements ResettableContainerInterface
             return $this->envCache[$name];
         }
         if (!$this->has($id = 'container.env_var_processors_locator')) {
-            $this->set($id, new ServiceLocator(array()));
+            $this->set($id, new ServiceLocator([]));
         }
         if (!$this->getEnv) {
             $this->getEnv = new \ReflectionMethod($this, __FUNCTION__);
diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
index 2d660ddf6e..58a4bfc484 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -54,29 +54,29 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     /**
      * @var ExtensionInterface[]
      */
-    private $extensions = array();
+    private $extensions = [];
 
     /**
      * @var ExtensionInterface[]
      */
-    private $extensionsByNs = array();
+    private $extensionsByNs = [];
 
     /**
      * @var Definition[]
      */
-    private $definitions = array();
+    private $definitions = [];
 
     /**
      * @var Alias[]
      */
-    private $aliasDefinitions = array();
+    private $aliasDefinitions = [];
 
     /**
      * @var ResourceInterface[]
      */
-    private $resources = array();
+    private $resources = [];
 
-    private $extensionConfigs = array();
+    private $extensionConfigs = [];
 
     /**
      * @var Compiler
@@ -98,33 +98,33 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     /**
      * @var ExpressionFunctionProviderInterface[]
      */
-    private $expressionLanguageProviders = array();
+    private $expressionLanguageProviders = [];
 
     /**
      * @var string[] with tag names used by findTaggedServiceIds
      */
-    private $usedTags = array();
+    private $usedTags = [];
 
     /**
      * @var string[][] a map of env var names to their placeholders
      */
-    private $envPlaceholders = array();
+    private $envPlaceholders = [];
 
     /**
      * @var int[] a map of env vars to their resolution counter
      */
-    private $envCounters = array();
+    private $envCounters = [];
 
     /**
      * @var string[] the list of vendor directories
      */
     private $vendors;
 
-    private $autoconfiguredInstanceof = array();
+    private $autoconfiguredInstanceof = [];
 
-    private $removedIds = array();
+    private $removedIds = [];
 
-    private static $internalTypes = array(
+    private static $internalTypes = [
         'int' => true,
         'float' => true,
         'string' => true,
@@ -136,7 +136,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         'callable' => true,
         'iterable' => true,
         'mixed' => true,
-    );
+    ];
 
     public function __construct(ParameterBagInterface $parameterBag = null)
     {
@@ -431,7 +431,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         }
 
         if (\func_num_args() < 2) {
-            $values = array();
+            $values = [];
         }
 
         $namespace = $this->getExtension($extension)->getAlias();
@@ -563,7 +563,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         }
         if (null === $inlineServices) {
             $isConstructorArgument = true;
-            $inlineServices = array();
+            $inlineServices = [];
         }
         try {
             if (ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE === $invalidBehavior) {
@@ -618,7 +618,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      * the parameters passed to the container constructor to have precedence
      * over the loaded ones.
      *
-     *     $container = new ContainerBuilder(new ParameterBag(array('foo' => 'bar')));
+     *     $container = new ContainerBuilder(new ParameterBag(['foo' => 'bar']));
      *     $loader = new LoaderXXX($container);
      *     $loader->load('resource_name');
      *     $container->register('foo', 'stdClass');
@@ -647,7 +647,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         foreach ($this->extensions as $name => $extension) {
             if (!isset($this->extensionConfigs[$name])) {
-                $this->extensionConfigs[$name] = array();
+                $this->extensionConfigs[$name] = [];
             }
 
             $this->extensionConfigs[$name] = array_merge($this->extensionConfigs[$name], $container->getExtensionConfig($name));
@@ -657,7 +657,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             $envPlaceholders = $container->getParameterBag()->getEnvPlaceholders();
             $this->getParameterBag()->mergeEnvPlaceholders($container->getParameterBag());
         } else {
-            $envPlaceholders = array();
+            $envPlaceholders = [];
         }
 
         foreach ($container->envCounters as $env => $count) {
@@ -690,7 +690,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     public function getExtensionConfig($name)
     {
         if (!isset($this->extensionConfigs[$name])) {
-            $this->extensionConfigs[$name] = array();
+            $this->extensionConfigs[$name] = [];
         }
 
         return $this->extensionConfigs[$name];
@@ -705,7 +705,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     public function prependExtensionConfig($name, array $config)
     {
         if (!isset($this->extensionConfigs[$name])) {
-            $this->extensionConfigs[$name] = array();
+            $this->extensionConfigs[$name] = [];
         }
 
         array_unshift($this->extensionConfigs[$name], $config);
@@ -753,7 +753,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             }
         }
 
-        $this->extensionConfigs = array();
+        $this->extensionConfigs = [];
 
         if ($bag instanceof EnvPlaceholderParameterBag) {
             if ($resolveEnvPlaceholders) {
@@ -807,7 +807,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public function setAliases(array $aliases)
     {
-        $this->aliasDefinitions = array();
+        $this->aliasDefinitions = [];
         $this->addAliases($aliases);
     }
 
@@ -947,7 +947,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public function setDefinitions(array $definitions)
     {
-        $this->definitions = array();
+        $this->definitions = [];
         $this->addDefinitions($definitions);
     }
 
@@ -1031,7 +1031,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     {
         $id = (string) $id;
 
-        $seen = array();
+        $seen = [];
         while (isset($this->aliasDefinitions[$id])) {
             $id = (string) $this->aliasDefinitions[$id];
 
@@ -1103,7 +1103,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         if (null !== $factory = $definition->getFactory()) {
             if (\is_array($factory)) {
-                $factory = array($this->doResolveServices($parameterBag->resolveValue($factory[0]), $inlineServices, $isConstructorArgument), $factory[1]);
+                $factory = [$this->doResolveServices($parameterBag->resolveValue($factory[0]), $inlineServices, $isConstructorArgument), $factory[1]];
             } elseif (!\is_string($factory)) {
                 throw new RuntimeException(sprintf('Cannot create service "%s" because of invalid factory', $id));
             }
@@ -1181,7 +1181,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         return $this->doResolveServices($value);
     }
 
-    private function doResolveServices($value, array &$inlineServices = array(), $isConstructorArgument = false)
+    private function doResolveServices($value, array &$inlineServices = [], $isConstructorArgument = false)
     {
         if (\is_array($value)) {
             foreach ($value as $k => $v) {
@@ -1228,13 +1228,13 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
                 return $count;
             });
         } elseif ($value instanceof ServiceLocatorArgument) {
-            $refs = array();
+            $refs = [];
             foreach ($value->getValues() as $k => $v) {
                 if ($v) {
-                    $refs[$k] = array($v);
+                    $refs[$k] = [$v];
                 }
             }
-            $value = new ServiceLocator(\Closure::fromCallable(array($this, 'resolveServices')), $refs);
+            $value = new ServiceLocator(\Closure::fromCallable([$this, 'resolveServices']), $refs);
         } elseif ($value instanceof Reference) {
             $value = $this->doGet((string) $value, $value->getInvalidBehavior(), $inlineServices, $isConstructorArgument);
         } elseif ($value instanceof Definition) {
@@ -1242,7 +1242,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         } elseif ($value instanceof Parameter) {
             $value = $this->getParameter((string) $value);
         } elseif ($value instanceof Expression) {
-            $value = $this->getExpressionLanguage()->evaluate($value, array('container' => $this));
+            $value = $this->getExpressionLanguage()->evaluate($value, ['container' => $this]);
         }
 
         return $value;
@@ -1253,7 +1253,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      *
      * Example:
      *
-     *     $container->register('foo')->addTag('my.tag', array('hello' => 'world'));
+     *     $container->register('foo')->addTag('my.tag', ['hello' => 'world']);
      *
      *     $serviceIds = $container->findTaggedServiceIds('my.tag');
      *     foreach ($serviceIds as $serviceId => $tags) {
@@ -1270,7 +1270,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     public function findTaggedServiceIds($name, $throwOnAbstract = false)
     {
         $this->usedTags[] = $name;
-        $tags = array();
+        $tags = [];
         foreach ($this->getDefinitions() as $id => $definition) {
             if ($definition->hasTag($name)) {
                 if ($throwOnAbstract && $definition->isAbstract()) {
@@ -1290,7 +1290,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public function findTags()
     {
-        $tags = array();
+        $tags = [];
         foreach ($this->getDefinitions() as $id => $definition) {
             $tags = array_merge(array_keys($definition->getTags()), $tags);
         }
@@ -1389,7 +1389,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         }
 
         if (\is_array($value)) {
-            $result = array();
+            $result = [];
             foreach ($value as $k => $v) {
                 $result[\is_string($k) ? $this->resolveEnvPlaceholders($k, $format, $usedEnvs) : $k] = $this->resolveEnvPlaceholders($v, $format, $usedEnvs);
             }
@@ -1471,7 +1471,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public static function getServiceConditionals($value)
     {
-        $services = array();
+        $services = [];
 
         if (\is_array($value)) {
             foreach ($value as $v) {
@@ -1495,7 +1495,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public static function getInitializedConditionals($value)
     {
-        $services = array();
+        $services = [];
 
         if (\is_array($value)) {
             foreach ($value as $v) {
@@ -1519,7 +1519,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     {
         $hash = substr(base64_encode(hash('sha256', serialize($value), true)), 0, 7);
 
-        return str_replace(array('/', '+'), array('.', '_'), $hash);
+        return str_replace(['/', '+'], ['.', '_'], $hash);
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Definition.php b/src/Symfony/Component/DependencyInjection/Definition.php
index e5a00958f3..93ac30aa92 100644
--- a/src/Symfony/Component/DependencyInjection/Definition.php
+++ b/src/Symfony/Component/DependencyInjection/Definition.php
@@ -28,12 +28,12 @@ class Definition
     private $shared = true;
     private $deprecated = false;
     private $deprecationTemplate;
-    private $properties = array();
-    private $calls = array();
-    private $instanceof = array();
+    private $properties = [];
+    private $calls = [];
+    private $instanceof = [];
     private $autoconfigured = false;
     private $configurator;
-    private $tags = array();
+    private $tags = [];
     private $public = true;
     private $private = true;
     private $synthetic = false;
@@ -41,11 +41,11 @@ class Definition
     private $lazy = false;
     private $decoratedService;
     private $autowired = false;
-    private $changes = array();
-    private $bindings = array();
-    private $errors = array();
+    private $changes = [];
+    private $bindings = [];
+    private $errors = [];
 
-    protected $arguments = array();
+    protected $arguments = [];
 
     private static $defaultDeprecationTemplate = 'The "%service_id%" service is deprecated. You should stop using it, as it will soon be removed.';
 
@@ -60,7 +60,7 @@ class Definition
      * @param string|null $class     The service class
      * @param array       $arguments An array of arguments to pass to the service constructor
      */
-    public function __construct($class = null, array $arguments = array())
+    public function __construct($class = null, array $arguments = [])
     {
         if (null !== $class) {
             $this->setClass($class);
@@ -144,7 +144,7 @@ class Definition
         if (null === $id) {
             $this->decoratedService = null;
         } else {
-            $this->decoratedService = array($id, $renamedId, (int) $priority);
+            $this->decoratedService = [$id, $renamedId, (int) $priority];
         }
 
         return $this;
@@ -326,9 +326,9 @@ class Definition
      *
      * @return $this
      */
-    public function setMethodCalls(array $calls = array())
+    public function setMethodCalls(array $calls = [])
     {
-        $this->calls = array();
+        $this->calls = [];
         foreach ($calls as $call) {
             $this->addMethodCall($call[0], $call[1]);
         }
@@ -346,12 +346,12 @@ class Definition
      *
      * @throws InvalidArgumentException on empty $method param
      */
-    public function addMethodCall($method, array $arguments = array())
+    public function addMethodCall($method, array $arguments = [])
     {
         if (empty($method)) {
             throw new InvalidArgumentException('Method name cannot be empty.');
         }
-        $this->calls[] = array($method, $arguments);
+        $this->calls[] = [$method, $arguments];
 
         return $this;
     }
@@ -482,7 +482,7 @@ class Definition
      */
     public function getTag($name)
     {
-        return isset($this->tags[$name]) ? $this->tags[$name] : array();
+        return isset($this->tags[$name]) ? $this->tags[$name] : [];
     }
 
     /**
@@ -493,7 +493,7 @@ class Definition
      *
      * @return $this
      */
-    public function addTag($name, array $attributes = array())
+    public function addTag($name, array $attributes = [])
     {
         $this->tags[$name][] = $attributes;
 
@@ -533,7 +533,7 @@ class Definition
      */
     public function clearTags()
     {
-        $this->tags = array();
+        $this->tags = [];
 
         return $this;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/DumperInterface.php b/src/Symfony/Component/DependencyInjection/Dumper/DumperInterface.php
index dd001e4ed0..1ea775ddfe 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/DumperInterface.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/DumperInterface.php
@@ -25,5 +25,5 @@ interface DumperInterface
      *
      * @return string The representation of the service container
      */
-    public function dump(array $options = array());
+    public function dump(array $options = []);
 }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
index 8cef0549bb..b1a9016b0f 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/GraphvizDumper.php
@@ -32,14 +32,14 @@ class GraphvizDumper extends Dumper
 {
     private $nodes;
     private $edges;
-    private $options = array(
-            'graph' => array('ratio' => 'compress'),
-            'node' => array('fontsize' => 11, 'fontname' => 'Arial', 'shape' => 'record'),
-            'edge' => array('fontsize' => 9, 'fontname' => 'Arial', 'color' => 'grey', 'arrowhead' => 'open', 'arrowsize' => 0.5),
-            'node.instance' => array('fillcolor' => '#9999ff', 'style' => 'filled'),
-            'node.definition' => array('fillcolor' => '#eeeeee'),
-            'node.missing' => array('fillcolor' => '#ff9999', 'style' => 'filled'),
-        );
+    private $options = [
+            'graph' => ['ratio' => 'compress'],
+            'node' => ['fontsize' => 11, 'fontname' => 'Arial', 'shape' => 'record'],
+            'edge' => ['fontsize' => 9, 'fontname' => 'Arial', 'color' => 'grey', 'arrowhead' => 'open', 'arrowsize' => 0.5],
+            'node.instance' => ['fillcolor' => '#9999ff', 'style' => 'filled'],
+            'node.definition' => ['fillcolor' => '#eeeeee'],
+            'node.missing' => ['fillcolor' => '#ff9999', 'style' => 'filled'],
+        ];
 
     /**
      * Dumps the service container as a graphviz graph.
@@ -55,9 +55,9 @@ class GraphvizDumper extends Dumper
      *
      * @return string The dot representation of the service container
      */
-    public function dump(array $options = array())
+    public function dump(array $options = [])
     {
-        foreach (array('graph', 'node', 'edge', 'node.instance', 'node.definition', 'node.missing') as $key) {
+        foreach (['graph', 'node', 'edge', 'node.instance', 'node.definition', 'node.missing'] as $key) {
             if (isset($options[$key])) {
                 $this->options[$key] = array_merge($this->options[$key], $options[$key]);
             }
@@ -65,7 +65,7 @@ class GraphvizDumper extends Dumper
 
         $this->nodes = $this->findNodes();
 
-        $this->edges = array();
+        $this->edges = [];
         foreach ($this->container->getDefinitions() as $id => $definition) {
             $this->edges[$id] = array_merge(
                 $this->findEdges($id, $definition->getArguments(), true, ''),
@@ -112,7 +112,7 @@ class GraphvizDumper extends Dumper
      */
     private function findEdges(string $id, array $arguments, bool $required, string $name, bool $lazy = false): array
     {
-        $edges = array();
+        $edges = [];
         foreach ($arguments as $argument) {
             if ($argument instanceof Parameter) {
                 $argument = $this->container->hasParameter($argument) ? $this->container->getParameter($argument) : null;
@@ -124,12 +124,12 @@ class GraphvizDumper extends Dumper
                 $lazyEdge = $lazy;
 
                 if (!$this->container->has((string) $argument)) {
-                    $this->nodes[(string) $argument] = array('name' => $name, 'required' => $required, 'class' => '', 'attributes' => $this->options['node.missing']);
+                    $this->nodes[(string) $argument] = ['name' => $name, 'required' => $required, 'class' => '', 'attributes' => $this->options['node.missing']];
                 } elseif ('service_container' !== (string) $argument) {
                     $lazyEdge = $lazy || $this->container->getDefinition((string) $argument)->isLazy();
                 }
 
-                $edges[] = array('name' => $name, 'required' => $required, 'to' => $argument, 'lazy' => $lazyEdge);
+                $edges[] = ['name' => $name, 'required' => $required, 'to' => $argument, 'lazy' => $lazyEdge];
             } elseif ($argument instanceof ArgumentInterface) {
                 $edges = array_merge($edges, $this->findEdges($id, $argument->getValues(), $required, $name, true));
             } elseif ($argument instanceof Definition) {
@@ -150,7 +150,7 @@ class GraphvizDumper extends Dumper
 
     private function findNodes(): array
     {
-        $nodes = array();
+        $nodes = [];
 
         $container = $this->cloneContainer();
 
@@ -166,7 +166,7 @@ class GraphvizDumper extends Dumper
             } catch (ParameterNotFoundException $e) {
             }
 
-            $nodes[$id] = array('class' => str_replace('\\', '\\\\', $class), 'attributes' => array_merge($this->options['node.definition'], array('style' => $definition->isShared() ? 'filled' : 'dotted')));
+            $nodes[$id] = ['class' => str_replace('\\', '\\\\', $class), 'attributes' => array_merge($this->options['node.definition'], ['style' => $definition->isShared() ? 'filled' : 'dotted'])];
             $container->setDefinition($id, new Definition('stdClass'));
         }
 
@@ -176,7 +176,7 @@ class GraphvizDumper extends Dumper
             }
 
             if (!$container->hasDefinition($id)) {
-                $nodes[$id] = array('class' => str_replace('\\', '\\\\', \get_class($container->get($id))), 'attributes' => $this->options['node.instance']);
+                $nodes[$id] = ['class' => str_replace('\\', '\\\\', \get_class($container->get($id))), 'attributes' => $this->options['node.instance']];
             }
         }
 
@@ -214,7 +214,7 @@ class GraphvizDumper extends Dumper
 
     private function addAttributes(array $attributes): string
     {
-        $code = array();
+        $code = [];
         foreach ($attributes as $k => $v) {
             $code[] = sprintf('%s="%s"', $k, $v);
         }
@@ -224,7 +224,7 @@ class GraphvizDumper extends Dumper
 
     private function addOptions(array $options): string
     {
-        $code = array();
+        $code = [];
         foreach ($options as $k => $v) {
             $code[] = sprintf('%s="%s"', $k, $v);
         }
@@ -239,7 +239,7 @@ class GraphvizDumper extends Dumper
 
     private function getAliases(string $id): array
     {
-        $aliases = array();
+        $aliases = [];
         foreach ($this->container->getAliases() as $alias => $origin) {
             if ($id == $origin) {
                 $aliases[] = $alias;
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
index 966712ace6..625f126621 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/XmlDumper.php
@@ -41,7 +41,7 @@ class XmlDumper extends Dumper
      *
      * @return string An xml string representing of the service container
      */
-    public function dump(array $options = array())
+    public function dump(array $options = [])
     {
         $this->document = new \DOMDocument('1.0', 'utf-8');
         $this->document->formatOutput = true;
@@ -307,7 +307,7 @@ class XmlDumper extends Dumper
                 $text = $this->document->createTextNode(self::phpToXml(base64_encode($value)));
                 $element->appendChild($text);
             } else {
-                if (\in_array($value, array('null', 'true', 'false'), true)) {
+                if (\in_array($value, ['null', 'true', 'false'], true)) {
                     $element->setAttribute('type', 'string');
                 }
                 $text = $this->document->createTextNode(self::phpToXml($value));
@@ -324,7 +324,7 @@ class XmlDumper extends Dumper
      */
     private function escape(array $arguments)
     {
-        $args = array();
+        $args = [];
         foreach ($arguments as $k => $v) {
             if (\is_array($v)) {
                 $args[$k] = $this->escape($v);
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
index 3ca193c7c9..2c07ebddad 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/YamlDumper.php
@@ -43,7 +43,7 @@ class YamlDumper extends Dumper
      *
      * @return string A YAML string representing of the service container
      */
-    public function dump(array $options = array())
+    public function dump(array $options = [])
     {
         if (!class_exists('Symfony\Component\Yaml\Dumper')) {
             throw new LogicException('Unable to dump the container as the Symfony Yaml Component is not installed.');
@@ -74,7 +74,7 @@ class YamlDumper extends Dumper
         $tagsCode = '';
         foreach ($definition->getTags() as $name => $tags) {
             foreach ($tags as $attributes) {
-                $att = array();
+                $att = [];
                 foreach ($attributes as $key => $value) {
                     $att[] = sprintf('%s: %s', $this->dumper->dump($key), $this->dumper->dump($value));
                 }
@@ -192,7 +192,7 @@ class YamlDumper extends Dumper
 
         $parameters = $this->prepareParameters($this->container->getParameterBag()->all(), $this->container->isCompiled());
 
-        return $this->dumper->dump(array('parameters' => $parameters), 2);
+        return $this->dumper->dump(['parameters' => $parameters], 2);
     }
 
     /**
@@ -206,9 +206,9 @@ class YamlDumper extends Dumper
     {
         if (\is_array($callable)) {
             if ($callable[0] instanceof Reference) {
-                $callable = array($this->getServiceCall((string) $callable[0], $callable[0]), $callable[1]);
+                $callable = [$this->getServiceCall((string) $callable[0], $callable[0]), $callable[1]];
             } else {
-                $callable = array($callable[0], $callable[1]);
+                $callable = [$callable[0], $callable[1]];
             }
         }
 
@@ -245,7 +245,7 @@ class YamlDumper extends Dumper
         }
 
         if (\is_array($value)) {
-            $code = array();
+            $code = [];
             foreach ($value as $k => $v) {
                 $code[$k] = $this->dumpValue($v);
             }
@@ -292,7 +292,7 @@ class YamlDumper extends Dumper
 
     private function prepareParameters(array $parameters, bool $escape = true): array
     {
-        $filtered = array();
+        $filtered = [];
         foreach ($parameters as $key => $value) {
             if (\is_array($value)) {
                 $value = $this->prepareParameters($value, $escape);
@@ -308,7 +308,7 @@ class YamlDumper extends Dumper
 
     private function escape(array $arguments): array
     {
-        $args = array();
+        $args = [];
         foreach ($arguments as $k => $v) {
             if (\is_array($v)) {
                 $args[$k] = $this->escape($v);
diff --git a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
index 0560de00f7..9fdc2fd775 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
@@ -34,7 +34,7 @@ class ParameterNotFoundException extends InvalidArgumentException implements Not
      * @param string[]    $alternatives         Some parameter name alternatives
      * @param string|null $nonNestedAlternative The alternative parameter name when the user expected dot notation for nested parameters
      */
-    public function __construct(string $key, string $sourceId = null, string $sourceKey = null, \Exception $previous = null, array $alternatives = array(), string $nonNestedAlternative = null)
+    public function __construct(string $key, string $sourceId = null, string $sourceKey = null, \Exception $previous = null, array $alternatives = [], string $nonNestedAlternative = null)
     {
         $this->key = $key;
         $this->sourceId = $sourceId;
diff --git a/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php b/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
index d867ec6f86..5c63aea062 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/ServiceNotFoundException.php
@@ -24,7 +24,7 @@ class ServiceNotFoundException extends InvalidArgumentException implements NotFo
     private $sourceId;
     private $alternatives;
 
-    public function __construct(string $id, string $sourceId = null, \Exception $previous = null, array $alternatives = array(), string $msg = null)
+    public function __construct(string $id, string $sourceId = null, \Exception $previous = null, array $alternatives = [], string $msg = null)
     {
         if (null !== $msg) {
             // no-op
diff --git a/src/Symfony/Component/DependencyInjection/ExpressionLanguage.php b/src/Symfony/Component/DependencyInjection/ExpressionLanguage.php
index a64561c3a9..4be1ae7085 100644
--- a/src/Symfony/Component/DependencyInjection/ExpressionLanguage.php
+++ b/src/Symfony/Component/DependencyInjection/ExpressionLanguage.php
@@ -26,7 +26,7 @@ class ExpressionLanguage extends BaseExpressionLanguage
     /**
      * {@inheritdoc}
      */
-    public function __construct(CacheItemPoolInterface $cache = null, array $providers = array(), callable $serviceCompiler = null)
+    public function __construct(CacheItemPoolInterface $cache = null, array $providers = [], callable $serviceCompiler = null)
     {
         // prepend the default provider to let users override it easily
         array_unshift($providers, new ExpressionLanguageProvider($serviceCompiler));
diff --git a/src/Symfony/Component/DependencyInjection/ExpressionLanguageProvider.php b/src/Symfony/Component/DependencyInjection/ExpressionLanguageProvider.php
index e2084aa85d..9198ca0a40 100644
--- a/src/Symfony/Component/DependencyInjection/ExpressionLanguageProvider.php
+++ b/src/Symfony/Component/DependencyInjection/ExpressionLanguageProvider.php
@@ -33,7 +33,7 @@ class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
 
     public function getFunctions()
     {
-        return array(
+        return [
             new ExpressionFunction('service', $this->serviceCompiler ?: function ($arg) {
                 return sprintf('$this->get(%s)', $arg);
             }, function (array $variables, $value) {
@@ -45,6 +45,6 @@ class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
             }, function (array $variables, $value) {
                 return $variables['container']->getParameter($value);
             }),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Extension/Extension.php b/src/Symfony/Component/DependencyInjection/Extension/Extension.php
index e210b5afa8..25d07ff83b 100644
--- a/src/Symfony/Component/DependencyInjection/Extension/Extension.php
+++ b/src/Symfony/Component/DependencyInjection/Extension/Extension.php
@@ -25,7 +25,7 @@ use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
  */
 abstract class Extension implements ExtensionInterface, ConfigurationExtensionInterface
 {
-    private $processedConfigs = array();
+    private $processedConfigs = [];
 
     /**
      * {@inheritdoc}
@@ -116,7 +116,7 @@ abstract class Extension implements ExtensionInterface, ConfigurationExtensionIn
         try {
             return $this->processedConfigs;
         } finally {
-            $this->processedConfigs = array();
+            $this->processedConfigs = [];
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractServiceConfigurator.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractServiceConfigurator.php
index 3d89e2a99e..9d3305e8ee 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractServiceConfigurator.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/AbstractServiceConfigurator.php
@@ -18,9 +18,9 @@ abstract class AbstractServiceConfigurator extends AbstractConfigurator
 {
     protected $parent;
     protected $id;
-    private $defaultTags = array();
+    private $defaultTags = [];
 
-    public function __construct(ServicesConfigurator $parent, Definition $definition, string $id = null, array $defaultTags = array())
+    public function __construct(ServicesConfigurator $parent, Definition $definition, string $id = null, array $defaultTags = [])
     {
         $this->parent = $parent;
         $this->definition = $definition;
@@ -36,7 +36,7 @@ abstract class AbstractServiceConfigurator extends AbstractConfigurator
                 $this->definition->addTag($name, $attributes);
             }
         }
-        $this->defaultTags = array();
+        $this->defaultTags = [];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/DefaultsConfigurator.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/DefaultsConfigurator.php
index 07f6b7257e..b928d75860 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/DefaultsConfigurator.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/DefaultsConfigurator.php
@@ -32,7 +32,7 @@ class DefaultsConfigurator extends AbstractServiceConfigurator
      *
      * @throws InvalidArgumentException when an invalid tag name or attribute is provided
      */
-    final public function tag(string $name, array $attributes = array())
+    final public function tag(string $name, array $attributes = [])
     {
         if ('' === $name) {
             throw new InvalidArgumentException('The tag name in "_defaults" must be a non-empty string.');
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/PrototypeConfigurator.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/PrototypeConfigurator.php
index 45e88a0bfa..119f2f252e 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/PrototypeConfigurator.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/PrototypeConfigurator.php
@@ -49,7 +49,7 @@ class PrototypeConfigurator extends AbstractServiceConfigurator
         $definition->setAutowired($defaults->isAutowired());
         $definition->setAutoconfigured($defaults->isAutoconfigured());
         $definition->setBindings($defaults->getBindings());
-        $definition->setChanges(array());
+        $definition->setChanges([]);
 
         $this->loader = $loader;
         $this->resource = $resource;
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/ServicesConfigurator.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/ServicesConfigurator.php
index 978bb87a71..366828ea4c 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/ServicesConfigurator.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/ServicesConfigurator.php
@@ -40,7 +40,7 @@ class ServicesConfigurator extends AbstractConfigurator
         $this->instanceof = &$instanceof;
         $this->anonymousHash = ContainerBuilder::hash($path ?: mt_rand());
         $this->anonymousCount = &$anonymousCount;
-        $instanceof = array();
+        $instanceof = [];
     }
 
     /**
@@ -88,7 +88,7 @@ class ServicesConfigurator extends AbstractConfigurator
         $definition->setAutowired($defaults->isAutowired());
         $definition->setAutoconfigured($defaults->isAutoconfigured());
         $definition->setBindings($defaults->getBindings());
-        $definition->setChanges(array());
+        $definition->setChanges([]);
 
         $configurator = new ServiceConfigurator($this->container, $this->instanceof, $allowParent, $this, $definition, $id, $defaults->getTags());
 
@@ -127,7 +127,7 @@ class ServicesConfigurator extends AbstractConfigurator
         $allowParent = !$this->defaults->getChanges() && empty($this->instanceof);
         $definition = $this->container->getDefinition($id);
 
-        return new ServiceConfigurator($this->container, $definition->getInstanceofConditionals(), $allowParent, $this, $definition, $id, array());
+        return new ServiceConfigurator($this->container, $definition->getInstanceofConditionals(), $allowParent, $this, $definition, $id, []);
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/CallTrait.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/CallTrait.php
index abc14e2155..8e6b17a19d 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/CallTrait.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/CallTrait.php
@@ -25,7 +25,7 @@ trait CallTrait
      *
      * @throws InvalidArgumentException on empty $method param
      */
-    final public function call($method, array $arguments = array())
+    final public function call($method, array $arguments = [])
     {
         $this->definition->addMethodCall($method, static::processValue($arguments, true));
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/LazyTrait.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/LazyTrait.php
index d2c3431fbd..d387dfb4b0 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/LazyTrait.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/LazyTrait.php
@@ -24,7 +24,7 @@ trait LazyTrait
     {
         $this->definition->setLazy((bool) $lazy);
         if (\is_string($lazy)) {
-            $this->definition->addTag('proxy', array('interface' => $lazy));
+            $this->definition->addTag('proxy', ['interface' => $lazy]);
         }
 
         return $this;
diff --git a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/TagTrait.php b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/TagTrait.php
index c165b6503e..d17339f88b 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/TagTrait.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/Configurator/Traits/TagTrait.php
@@ -23,7 +23,7 @@ trait TagTrait
      *
      * @return $this
      */
-    final public function tag($name, array $attributes = array())
+    final public function tag($name, array $attributes = [])
     {
         if (!\is_string($name) || '' === $name) {
             throw new InvalidArgumentException(sprintf('The tag name for service "%s" must be a non-empty string.', $this->id));
diff --git a/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
index f1186214d5..62ebbde7f5 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/FileLoader.php
@@ -28,7 +28,7 @@ abstract class FileLoader extends BaseFileLoader
 {
     protected $container;
     protected $isLoadingInstanceof = false;
-    protected $instanceof = array();
+    protected $instanceof = [];
 
     public function __construct(ContainerBuilder $container, FileLocatorInterface $locator)
     {
@@ -57,8 +57,8 @@ abstract class FileLoader extends BaseFileLoader
         $classes = $this->findClasses($namespace, $resource, (array) $exclude);
         // prepare for deep cloning
         $serializedPrototype = serialize($prototype);
-        $interfaces = array();
-        $singlyImplemented = array();
+        $interfaces = [];
+        $singlyImplemented = [];
 
         foreach ($classes as $class => $errorMessage) {
             if (interface_exists($class, false)) {
@@ -105,7 +105,7 @@ abstract class FileLoader extends BaseFileLoader
     {
         $parameterBag = $this->container->getParameterBag();
 
-        $excludePaths = array();
+        $excludePaths = [];
         $excludePrefix = null;
         $excludePatterns = $parameterBag->unescapeValue($parameterBag->resolveValue($excludePatterns));
         foreach ($excludePatterns as $excludePattern) {
@@ -120,7 +120,7 @@ abstract class FileLoader extends BaseFileLoader
         }
 
         $pattern = $parameterBag->unescapeValue($parameterBag->resolveValue($pattern));
-        $classes = array();
+        $classes = [];
         $extRegexp = '/\\.php$/';
         $prefixLen = null;
         foreach ($this->glob($pattern, true, $resource, false, false, $excludePaths) as $path => $info) {
diff --git a/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
index 2ee9ea8ffc..307a3eefbb 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/IniFileLoader.php
@@ -32,7 +32,7 @@ class IniFileLoader extends FileLoader
 
         // first pass to catch parsing errors
         $result = parse_ini_file($path, true);
-        if (false === $result || array() === $result) {
+        if (false === $result || [] === $result) {
             throw new InvalidArgumentException(sprintf('The "%s" file is not valid.', $resource));
         }
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
index bc67d1ec22..c5292ecf68 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php
@@ -65,7 +65,7 @@ class XmlFileLoader extends FileLoader
         try {
             $this->parseDefinitions($xml, $path, $defaults);
         } finally {
-            $this->instanceof = array();
+            $this->instanceof = [];
         }
     }
 
@@ -136,11 +136,11 @@ class XmlFileLoader extends FileLoader
         }
         $this->setCurrentDir(\dirname($file));
 
-        $this->instanceof = array();
+        $this->instanceof = [];
         $this->isLoadingInstanceof = true;
         $instanceof = $xpath->query('//container:services/container:instanceof');
         foreach ($instanceof as $service) {
-            $this->setDefinition((string) $service->getAttribute('id'), $this->parseDefinition($service, $file, array()));
+            $this->setDefinition((string) $service->getAttribute('id'), $this->parseDefinition($service, $file, []));
         }
 
         $this->isLoadingInstanceof = false;
@@ -152,7 +152,7 @@ class XmlFileLoader extends FileLoader
                         if (\count($excludes) > 0) {
                             throw new InvalidArgumentException('You cannot use both the attribute "exclude" and <exclude> tags at the same time.');
                         }
-                        $excludes = array($service->getAttribute('exclude'));
+                        $excludes = [$service->getAttribute('exclude')];
                     }
                     $this->registerClasses($definition, (string) $service->getAttribute('namespace'), (string) $service->getAttribute('resource'), $excludes);
                 } else {
@@ -173,12 +173,12 @@ class XmlFileLoader extends FileLoader
         $xpath->registerNamespace('container', self::NS);
 
         if (null === $defaultsNode = $xpath->query('//container:services/container:defaults')->item(0)) {
-            return array();
+            return [];
         }
-        $defaults = array(
+        $defaults = [
             'tags' => $this->getChildren($defaultsNode, 'tag'),
             'bind' => array_map(function ($v) { return new BoundArgument($v); }, $this->getArgumentsAsPhp($defaultsNode, 'bind', $file)),
-        );
+        ];
 
         foreach ($defaults['tags'] as $tag) {
             if ('' === $tag->getAttribute('name')) {
@@ -262,10 +262,10 @@ class XmlFileLoader extends FileLoader
                 $definition->setAutoconfigured($defaults['autoconfigure']);
             }
 
-            $definition->setChanges(array());
+            $definition->setChanges([]);
         }
 
-        foreach (array('class', 'public', 'shared', 'synthetic', 'abstract') as $key) {
+        foreach (['class', 'public', 'shared', 'synthetic', 'abstract'] as $key) {
             if ($value = $service->getAttribute($key)) {
                 $method = 'set'.$key;
                 $definition->$method($value = XmlUtils::phpize($value));
@@ -275,7 +275,7 @@ class XmlFileLoader extends FileLoader
         if ($value = $service->getAttribute('lazy')) {
             $definition->setLazy((bool) $value = XmlUtils::phpize($value));
             if (\is_string($value)) {
-                $definition->addTag('proxy', array('interface' => $value));
+                $definition->addTag('proxy', ['interface' => $value]);
             }
         }
 
@@ -313,7 +313,7 @@ class XmlFileLoader extends FileLoader
                     $class = $factory->hasAttribute('class') ? $factory->getAttribute('class') : null;
                 }
 
-                $definition->setFactory(array($class, $factory->getAttribute('method')));
+                $definition->setFactory([$class, $factory->getAttribute('method')]);
             }
         }
 
@@ -328,7 +328,7 @@ class XmlFileLoader extends FileLoader
                     $class = $configurator->getAttribute('class');
                 }
 
-                $definition->setConfigurator(array($class, $configurator->getAttribute('method')));
+                $definition->setConfigurator([$class, $configurator->getAttribute('method')]);
             }
         }
 
@@ -343,7 +343,7 @@ class XmlFileLoader extends FileLoader
         }
 
         foreach ($tags as $tag) {
-            $parameters = array();
+            $parameters = [];
             foreach ($tag->attributes as $name => $node) {
                 if ('name' === $name) {
                     continue;
@@ -393,7 +393,7 @@ class XmlFileLoader extends FileLoader
     private function parseFileToDOM($file)
     {
         try {
-            $dom = XmlUtils::loadFile($file, array($this, 'validateSchema'));
+            $dom = XmlUtils::loadFile($file, [$this, 'validateSchema']);
         } catch (\InvalidArgumentException $e) {
             throw new InvalidArgumentException(sprintf('Unable to parse file "%s".', $file), $e->getCode(), $e);
         }
@@ -412,7 +412,7 @@ class XmlFileLoader extends FileLoader
      */
     private function processAnonymousServices(\DOMDocument $xml, $file, $defaults)
     {
-        $definitions = array();
+        $definitions = [];
         $count = 0;
         $suffix = '~'.ContainerBuilder::hash($file);
 
@@ -428,7 +428,7 @@ class XmlFileLoader extends FileLoader
                     $node->setAttribute('id', $id);
                     $node->setAttribute('service', $id);
 
-                    $definitions[$id] = array($services[0], $file);
+                    $definitions[$id] = [$services[0], $file];
                     $services[0]->setAttribute('id', $id);
 
                     // anonymous services are always private
@@ -448,7 +448,7 @@ class XmlFileLoader extends FileLoader
         // resolve definitions
         uksort($definitions, 'strnatcmp');
         foreach (array_reverse($definitions) as $id => list($domElement, $file)) {
-            if (null !== $definition = $this->parseDefinition($domElement, $file, array())) {
+            if (null !== $definition = $this->parseDefinition($domElement, $file, [])) {
                 $this->setDefinition($id, $definition);
             }
         }
@@ -466,7 +466,7 @@ class XmlFileLoader extends FileLoader
      */
     private function getArgumentsAsPhp(\DOMElement $node, $name, $file, $lowercase = true, $isChildDefinition = false)
     {
-        $arguments = array();
+        $arguments = [];
         foreach ($this->getChildren($node, $name) as $arg) {
             if ($arg->hasAttribute('name')) {
                 $arg->setAttribute('key', $arg->getAttribute('name'));
@@ -565,7 +565,7 @@ class XmlFileLoader extends FileLoader
      */
     private function getChildren(\DOMNode $node, $name)
     {
-        $children = array();
+        $children = [];
         foreach ($node->childNodes as $child) {
             if ($child instanceof \DOMElement && $child->localName === $name && self::NS === $child->namespaceURI) {
                 $children[] = $child;
@@ -586,7 +586,7 @@ class XmlFileLoader extends FileLoader
      */
     public function validateSchema(\DOMDocument $dom)
     {
-        $schemaLocations = array('http://symfony.com/schema/dic/services' => str_replace('\\', '/', __DIR__.'/schema/dic/services/services-1.0.xsd'));
+        $schemaLocations = ['http://symfony.com/schema/dic/services' => str_replace('\\', '/', __DIR__.'/schema/dic/services/services-1.0.xsd')];
 
         if ($element = $dom->documentElement->getAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation')) {
             $items = preg_split('/\s+/', $element);
@@ -607,7 +607,7 @@ class XmlFileLoader extends FileLoader
             }
         }
 
-        $tmpfiles = array();
+        $tmpfiles = [];
         $imports = '';
         foreach ($schemaLocations as $namespace => $location) {
             $parts = explode('/', $location);
@@ -662,7 +662,7 @@ EOF
     private function validateAlias(\DOMElement $alias, $file)
     {
         foreach ($alias->attributes as $name => $node) {
-            if (!\in_array($name, array('alias', 'id', 'public'))) {
+            if (!\in_array($name, ['alias', 'id', 'public'])) {
                 throw new InvalidArgumentException(sprintf('Invalid attribute "%s" defined for alias "%s" in "%s".', $name, $alias->getAttribute('id'), $file));
             }
         }
@@ -711,7 +711,7 @@ EOF
 
             $values = static::convertDomElementToArray($node);
             if (!\is_array($values)) {
-                $values = array();
+                $values = [];
             }
 
             $this->container->loadFromExtension($node->namespaceURI, $values);
diff --git a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
index e286d27952..05fbe86363 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
@@ -38,7 +38,7 @@ use Symfony\Component\Yaml\Yaml;
  */
 class YamlFileLoader extends FileLoader
 {
-    private static $serviceKeywords = array(
+    private static $serviceKeywords = [
         'alias' => 'alias',
         'parent' => 'parent',
         'class' => 'class',
@@ -61,9 +61,9 @@ class YamlFileLoader extends FileLoader
         'autowire' => 'autowire',
         'autoconfigure' => 'autoconfigure',
         'bind' => 'bind',
-    );
+    ];
 
-    private static $prototypeKeywords = array(
+    private static $prototypeKeywords = [
         'resource' => 'resource',
         'namespace' => 'namespace',
         'exclude' => 'exclude',
@@ -82,9 +82,9 @@ class YamlFileLoader extends FileLoader
         'autowire' => 'autowire',
         'autoconfigure' => 'autoconfigure',
         'bind' => 'bind',
-    );
+    ];
 
-    private static $instanceofKeywords = array(
+    private static $instanceofKeywords = [
         'shared' => 'shared',
         'lazy' => 'lazy',
         'public' => 'public',
@@ -94,15 +94,15 @@ class YamlFileLoader extends FileLoader
         'tags' => 'tags',
         'autowire' => 'autowire',
         'bind' => 'bind',
-    );
+    ];
 
-    private static $defaultsKeywords = array(
+    private static $defaultsKeywords = [
         'public' => 'public',
         'tags' => 'tags',
         'autowire' => 'autowire',
         'autoconfigure' => 'autoconfigure',
         'bind' => 'bind',
-    );
+    ];
 
     private $yamlParser;
 
@@ -149,7 +149,7 @@ class YamlFileLoader extends FileLoader
         try {
             $this->parseDefinitions($content, $path);
         } finally {
-            $this->instanceof = array();
+            $this->instanceof = [];
         }
     }
 
@@ -162,11 +162,11 @@ class YamlFileLoader extends FileLoader
             return false;
         }
 
-        if (null === $type && \in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yaml', 'yml'), true)) {
+        if (null === $type && \in_array(pathinfo($resource, PATHINFO_EXTENSION), ['yaml', 'yml'], true)) {
             return true;
         }
 
-        return \in_array($type, array('yaml', 'yml'), true);
+        return \in_array($type, ['yaml', 'yml'], true);
     }
 
     private function parseImports(array $content, string $file)
@@ -182,7 +182,7 @@ class YamlFileLoader extends FileLoader
         $defaultDirectory = \dirname($file);
         foreach ($content['imports'] as $import) {
             if (!\is_array($import)) {
-                $import = array('resource' => $import);
+                $import = ['resource' => $import];
             }
             if (!isset($import['resource'])) {
                 throw new InvalidArgumentException(sprintf('An import should provide a resource in %s. Check your YAML syntax.', $file));
@@ -210,7 +210,7 @@ class YamlFileLoader extends FileLoader
             if (!\is_array($instanceof)) {
                 throw new InvalidArgumentException(sprintf('Service "_instanceof" key must be an array, "%s" given in "%s".', \gettype($instanceof), $file));
             }
-            $this->instanceof = array();
+            $this->instanceof = [];
             $this->isLoadingInstanceof = true;
             foreach ($instanceof as $id => $service) {
                 if (!$service || !\is_array($service)) {
@@ -219,7 +219,7 @@ class YamlFileLoader extends FileLoader
                 if (\is_string($service) && 0 === strpos($service, '@')) {
                     throw new InvalidArgumentException(sprintf('Type definition "%s" cannot be an alias within "_instanceof" in %s. Check your YAML syntax.', $id, $file));
                 }
-                $this->parseDefinition($id, $service, $file, array());
+                $this->parseDefinition($id, $service, $file, []);
             }
         }
 
@@ -236,7 +236,7 @@ class YamlFileLoader extends FileLoader
     private function parseDefaults(array &$content, string $file): array
     {
         if (!array_key_exists('_defaults', $content['services'])) {
-            return array();
+            return [];
         }
         $defaults = $content['services']['_defaults'];
         unset($content['services']['_defaults']);
@@ -258,7 +258,7 @@ class YamlFileLoader extends FileLoader
 
             foreach ($tags as $tag) {
                 if (!\is_array($tag)) {
-                    $tag = array('name' => $tag);
+                    $tag = ['name' => $tag];
                 }
 
                 if (!isset($tag['name'])) {
@@ -327,11 +327,11 @@ class YamlFileLoader extends FileLoader
         }
 
         if (\is_array($service) && $this->isUsingShortSyntax($service)) {
-            $service = array('arguments' => $service);
+            $service = ['arguments' => $service];
         }
 
         if (null === $service) {
-            $service = array();
+            $service = [];
         }
 
         if (!\is_array($service)) {
@@ -349,7 +349,7 @@ class YamlFileLoader extends FileLoader
             }
 
             foreach ($service as $key => $value) {
-                if (!\in_array($key, array('alias', 'public'))) {
+                if (!\in_array($key, ['alias', 'public'])) {
                     throw new InvalidArgumentException(sprintf('The configuration key "%s" is unsupported for the service "%s" which is defined as an alias in "%s". Allowed configuration keys for service aliases are "alias" and "public".', $key, $id, $file));
                 }
             }
@@ -396,7 +396,7 @@ class YamlFileLoader extends FileLoader
                 $definition->setAutoconfigured($defaults['autoconfigure']);
             }
 
-            $definition->setChanges(array());
+            $definition->setChanges([]);
         }
 
         if (isset($service['class'])) {
@@ -414,7 +414,7 @@ class YamlFileLoader extends FileLoader
         if (isset($service['lazy'])) {
             $definition->setLazy((bool) $service['lazy']);
             if (\is_string($service['lazy'])) {
-                $definition->addTag('proxy', array('interface' => $service['lazy']));
+                $definition->addTag('proxy', ['interface' => $service['lazy']]);
             }
         }
 
@@ -458,10 +458,10 @@ class YamlFileLoader extends FileLoader
             foreach ($service['calls'] as $call) {
                 if (isset($call['method'])) {
                     $method = $call['method'];
-                    $args = isset($call['arguments']) ? $this->resolveServices($call['arguments'], $file) : array();
+                    $args = isset($call['arguments']) ? $this->resolveServices($call['arguments'], $file) : [];
                 } else {
                     $method = $call[0];
-                    $args = isset($call[1]) ? $this->resolveServices($call[1], $file) : array();
+                    $args = isset($call[1]) ? $this->resolveServices($call[1], $file) : [];
                 }
 
                 if (!\is_array($args)) {
@@ -471,7 +471,7 @@ class YamlFileLoader extends FileLoader
             }
         }
 
-        $tags = isset($service['tags']) ? $service['tags'] : array();
+        $tags = isset($service['tags']) ? $service['tags'] : [];
         if (!\is_array($tags)) {
             throw new InvalidArgumentException(sprintf('Parameter "tags" must be an array for service "%s" in %s. Check your YAML syntax.', $id, $file));
         }
@@ -482,7 +482,7 @@ class YamlFileLoader extends FileLoader
 
         foreach ($tags as $tag) {
             if (!\is_array($tag)) {
-                $tag = array('name' => $tag);
+                $tag = ['name' => $tag];
             }
 
             if (!isset($tag['name'])) {
@@ -520,7 +520,7 @@ class YamlFileLoader extends FileLoader
 
         if (isset($defaults['bind']) || isset($service['bind'])) {
             // deep clone, to avoid multiple process of the same instance in the passes
-            $bindings = isset($defaults['bind']) ? unserialize(serialize($defaults['bind'])) : array();
+            $bindings = isset($defaults['bind']) ? unserialize(serialize($defaults['bind'])) : [];
 
             if (isset($service['bind'])) {
                 if (!\is_array($service['bind'])) {
@@ -579,7 +579,7 @@ class YamlFileLoader extends FileLoader
             if (false !== strpos($callable, ':') && false === strpos($callable, '::')) {
                 $parts = explode(':', $callable);
 
-                return array($this->resolveServices('@'.$parts[0], $file), $parts[1]);
+                return [$this->resolveServices('@'.$parts[0], $file), $parts[1]];
             }
 
             return $callable;
@@ -587,7 +587,7 @@ class YamlFileLoader extends FileLoader
 
         if (\is_array($callable)) {
             if (isset($callable[0]) && isset($callable[1])) {
-                return array($this->resolveServices($callable[0], $file), $callable[1]);
+                return [$this->resolveServices($callable[0], $file), $callable[1]];
             }
 
             if ('factory' === $parameter && isset($callable[1]) && null === $callable[0]) {
@@ -657,7 +657,7 @@ class YamlFileLoader extends FileLoader
         }
 
         foreach ($content as $namespace => $data) {
-            if (\in_array($namespace, array('imports', 'parameters', 'services'))) {
+            if (\in_array($namespace, ['imports', 'parameters', 'services'])) {
                 continue;
             }
 
@@ -720,10 +720,10 @@ class YamlFileLoader extends FileLoader
                 $isLoadingInstanceof = $this->isLoadingInstanceof;
                 $this->isLoadingInstanceof = false;
                 $instanceof = $this->instanceof;
-                $this->instanceof = array();
+                $this->instanceof = [];
 
                 $id = sprintf('.%d_%s', ++$this->anonymousServicesCount, preg_replace('/^.*\\\\/', '', isset($argument['class']) ? $argument['class'] : '').$this->anonymousServicesSuffix);
-                $this->parseDefinition($id, $argument, $file, array());
+                $this->parseDefinition($id, $argument, $file, []);
 
                 if (!$this->container->hasDefinition($id)) {
                     throw new InvalidArgumentException(sprintf('Creating an alias using the tag "!service" is not allowed in "%s".', $file));
@@ -779,12 +779,12 @@ class YamlFileLoader extends FileLoader
     private function loadFromExtensions(array $content)
     {
         foreach ($content as $namespace => $values) {
-            if (\in_array($namespace, array('imports', 'parameters', 'services'))) {
+            if (\in_array($namespace, ['imports', 'parameters', 'services'])) {
                 continue;
             }
 
             if (!\is_array($values) && null !== $values) {
-                $values = array();
+                $values = [];
             }
 
             $this->container->loadFromExtension($namespace, $values);
diff --git a/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php b/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
index 3b9b9cfae9..1a15793380 100644
--- a/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
+++ b/src/Symfony/Component/DependencyInjection/ParameterBag/EnvPlaceholderParameterBag.php
@@ -20,9 +20,9 @@ use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 class EnvPlaceholderParameterBag extends ParameterBag
 {
     private $envPlaceholderUniquePrefix;
-    private $envPlaceholders = array();
-    private $unusedEnvPlaceholders = array();
-    private $providedTypes = array();
+    private $envPlaceholders = [];
+    private $unusedEnvPlaceholders = [];
+    private $providedTypes = [];
 
     /**
      * {@inheritdoc}
@@ -89,7 +89,7 @@ class EnvPlaceholderParameterBag extends ParameterBag
 
     public function clearUnusedEnvPlaceholders()
     {
-        $this->unusedEnvPlaceholders = array();
+        $this->unusedEnvPlaceholders = [];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php b/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php
index ad65ad960f..a5199937e2 100644
--- a/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php
+++ b/src/Symfony/Component/DependencyInjection/ParameterBag/FrozenParameterBag.php
@@ -28,7 +28,7 @@ class FrozenParameterBag extends ParameterBag
      *
      * @param array $parameters An array of parameters
      */
-    public function __construct(array $parameters = array())
+    public function __construct(array $parameters = [])
     {
         $this->parameters = $parameters;
         $this->resolved = true;
diff --git a/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php b/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
index 91f61b68fd..84170577fc 100644
--- a/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
+++ b/src/Symfony/Component/DependencyInjection/ParameterBag/ParameterBag.php
@@ -22,13 +22,13 @@ use Symfony\Component\DependencyInjection\Exception\RuntimeException;
  */
 class ParameterBag implements ParameterBagInterface
 {
-    protected $parameters = array();
+    protected $parameters = [];
     protected $resolved = false;
 
     /**
      * @param array $parameters An array of parameters
      */
-    public function __construct(array $parameters = array())
+    public function __construct(array $parameters = [])
     {
         $this->add($parameters);
     }
@@ -38,7 +38,7 @@ class ParameterBag implements ParameterBagInterface
      */
     public function clear()
     {
-        $this->parameters = array();
+        $this->parameters = [];
     }
 
     /**
@@ -73,7 +73,7 @@ class ParameterBag implements ParameterBagInterface
                 throw new ParameterNotFoundException($name);
             }
 
-            $alternatives = array();
+            $alternatives = [];
             foreach ($this->parameters as $key => $parameterValue) {
                 $lev = levenshtein($name, $key);
                 if ($lev <= \strlen($name) / 3 || false !== strpos($key, $name)) {
@@ -141,7 +141,7 @@ class ParameterBag implements ParameterBagInterface
             return;
         }
 
-        $parameters = array();
+        $parameters = [];
         foreach ($this->parameters as $key => $value) {
             try {
                 $value = $this->resolveValue($value);
@@ -169,10 +169,10 @@ class ParameterBag implements ParameterBagInterface
      * @throws ParameterCircularReferenceException if a circular reference if detected
      * @throws RuntimeException                    when a given parameter has a type problem
      */
-    public function resolveValue($value, array $resolving = array())
+    public function resolveValue($value, array $resolving = [])
     {
         if (\is_array($value)) {
-            $args = array();
+            $args = [];
             foreach ($value as $k => $v) {
                 $args[\is_string($k) ? $this->resolveValue($k, $resolving) : $k] = $this->resolveValue($v, $resolving);
             }
@@ -199,7 +199,7 @@ class ParameterBag implements ParameterBagInterface
      * @throws ParameterCircularReferenceException if a circular reference if detected
      * @throws RuntimeException                    when a given parameter has a type problem
      */
-    public function resolveString($value, array $resolving = array())
+    public function resolveString($value, array $resolving = [])
     {
         // we do this to deal with non string values (Boolean, integer, ...)
         // as the preg_replace_callback throw an exception when trying
@@ -255,7 +255,7 @@ class ParameterBag implements ParameterBagInterface
         }
 
         if (\is_array($value)) {
-            $result = array();
+            $result = [];
             foreach ($value as $k => $v) {
                 $result[$k] = $this->escapeValue($v);
             }
@@ -276,7 +276,7 @@ class ParameterBag implements ParameterBagInterface
         }
 
         if (\is_array($value)) {
-            $result = array();
+            $result = [];
             foreach ($value as $k => $v) {
                 $result[$k] = $this->unescapeValue($v);
             }
diff --git a/src/Symfony/Component/DependencyInjection/ServiceLocator.php b/src/Symfony/Component/DependencyInjection/ServiceLocator.php
index 9261c6546f..45a3524135 100644
--- a/src/Symfony/Component/DependencyInjection/ServiceLocator.php
+++ b/src/Symfony/Component/DependencyInjection/ServiceLocator.php
@@ -79,14 +79,14 @@ class ServiceLocator implements PsrContainerInterface
         if ($this->loading) {
             $msg = sprintf('The service "%s" has a dependency on a non-existent service "%s". This locator %s', end($this->loading), $id, $this->formatAlternatives());
 
-            return new ServiceNotFoundException($id, end($this->loading) ?: null, null, array(), $msg);
+            return new ServiceNotFoundException($id, end($this->loading) ?: null, null, [], $msg);
         }
 
         $class = debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT | DEBUG_BACKTRACE_IGNORE_ARGS, 4);
         $class = isset($class[3]['object']) ? \get_class($class[3]['object']) : null;
         $externalId = $this->externalId ?: $class;
 
-        $msg = array();
+        $msg = [];
         $msg[] = sprintf('Service "%s" not found:', $id);
 
         if (!$this->container) {
@@ -119,7 +119,7 @@ class ServiceLocator implements PsrContainerInterface
             $msg[] = 'Try using dependency injection instead.';
         }
 
-        return new ServiceNotFoundException($id, end($this->loading) ?: null, null, array(), implode(' ', $msg));
+        return new ServiceNotFoundException($id, end($this->loading) ?: null, null, [], implode(' ', $msg));
     }
 
     private function createCircularReferenceException(string $id, array $path): ContainerExceptionInterface
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ChildDefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/ChildDefinitionTest.php
index 7f359b94f5..b1eef8d24b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ChildDefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ChildDefinitionTest.php
@@ -21,7 +21,7 @@ class ChildDefinitionTest extends TestCase
         $def = new ChildDefinition('foo');
 
         $this->assertSame('foo', $def->getParent());
-        $this->assertSame(array(), $def->getChanges());
+        $this->assertSame([], $def->getChanges());
     }
 
     /**
@@ -37,17 +37,17 @@ class ChildDefinitionTest extends TestCase
         $this->assertNull($def->$getter());
         $this->assertSame($def, $def->$setter('foo'));
         $this->assertSame('foo', $def->$getter());
-        $this->assertSame(array($changeKey => true), $def->getChanges());
+        $this->assertSame([$changeKey => true], $def->getChanges());
     }
 
     public function getPropertyTests()
     {
-        return array(
-            array('class', 'class'),
-            array('factory', 'factory'),
-            array('configurator', 'configurator'),
-            array('file', 'file'),
-        );
+        return [
+            ['class', 'class'],
+            ['factory', 'factory'],
+            ['configurator', 'configurator'],
+            ['file', 'file'],
+        ];
     }
 
     public function testSetPublic()
@@ -57,7 +57,7 @@ class ChildDefinitionTest extends TestCase
         $this->assertTrue($def->isPublic());
         $this->assertSame($def, $def->setPublic(false));
         $this->assertFalse($def->isPublic());
-        $this->assertSame(array('public' => true), $def->getChanges());
+        $this->assertSame(['public' => true], $def->getChanges());
     }
 
     public function testSetLazy()
@@ -67,7 +67,7 @@ class ChildDefinitionTest extends TestCase
         $this->assertFalse($def->isLazy());
         $this->assertSame($def, $def->setLazy(false));
         $this->assertFalse($def->isLazy());
-        $this->assertSame(array('lazy' => true), $def->getChanges());
+        $this->assertSame(['lazy' => true], $def->getChanges());
     }
 
     public function testSetAutowired()
@@ -77,16 +77,16 @@ class ChildDefinitionTest extends TestCase
         $this->assertFalse($def->isAutowired());
         $this->assertSame($def, $def->setAutowired(true));
         $this->assertTrue($def->isAutowired());
-        $this->assertSame(array('autowired' => true), $def->getChanges());
+        $this->assertSame(['autowired' => true], $def->getChanges());
     }
 
     public function testSetArgument()
     {
         $def = new ChildDefinition('foo');
 
-        $this->assertSame(array(), $def->getArguments());
+        $this->assertSame([], $def->getArguments());
         $this->assertSame($def, $def->replaceArgument(0, 'foo'));
-        $this->assertSame(array('index_0' => 'foo'), $def->getArguments());
+        $this->assertSame(['index_0' => 'foo'], $def->getArguments());
     }
 
     /**
@@ -103,7 +103,7 @@ class ChildDefinitionTest extends TestCase
     {
         $def = new ChildDefinition('foo');
 
-        $def->setArguments(array(0 => 'foo', 1 => 'bar'));
+        $def->setArguments([0 => 'foo', 1 => 'bar']);
         $this->assertSame('foo', $def->getArgument(0));
         $this->assertSame('bar', $def->getArgument(1));
 
@@ -111,11 +111,11 @@ class ChildDefinitionTest extends TestCase
         $this->assertSame('foo', $def->getArgument(0));
         $this->assertSame('baz', $def->getArgument(1));
 
-        $this->assertSame(array(0 => 'foo', 1 => 'bar', 'index_1' => 'baz'), $def->getArguments());
+        $this->assertSame([0 => 'foo', 1 => 'bar', 'index_1' => 'baz'], $def->getArguments());
 
         $this->assertSame($def, $def->replaceArgument('$bar', 'val'));
         $this->assertSame('val', $def->getArgument('$bar'));
-        $this->assertSame(array(0 => 'foo', 1 => 'bar', 'index_1' => 'baz', '$bar' => 'val'), $def->getArguments());
+        $this->assertSame([0 => 'foo', 1 => 'bar', 'index_1' => 'baz', '$bar' => 'val'], $def->getArguments());
     }
 
     /**
@@ -125,7 +125,7 @@ class ChildDefinitionTest extends TestCase
     {
         $def = new ChildDefinition('foo');
 
-        $def->setArguments(array(0 => 'foo'));
+        $def->setArguments([0 => 'foo']);
         $def->replaceArgument(0, 'foo');
 
         $def->getArgument(1);
@@ -146,6 +146,6 @@ class ChildDefinitionTest extends TestCase
     public function testCannotCallSetInstanceofConditionals()
     {
         $def = new ChildDefinition('foo');
-        $def->setInstanceofConditionals(array('Foo' => new ChildDefinition('')));
+        $def->setInstanceofConditionals(['Foo' => new ChildDefinition('')]);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
index 3cf23aa119..48c3df595c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AnalyzeServiceReferencesPassTest.php
@@ -31,7 +31,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
 
         $b = $container
             ->register('b')
-            ->addMethodCall('setA', array($ref2 = new Reference('a')))
+            ->addMethodCall('setA', [$ref2 = new Reference('a')])
         ;
 
         $c = $container
@@ -47,7 +47,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
 
         $e = $container
             ->register('e')
-            ->setConfigurator(array($ref6 = new Reference('b'), 'methodName'))
+            ->setConfigurator([$ref6 = new Reference('b'), 'methodName'])
         ;
 
         $graph = $this->process($container);
@@ -93,7 +93,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
         $container
             ->register('c')
             ->addArgument($ref1 = new Reference('a'))
-            ->addArgument(new IteratorArgument(array($ref2 = new Reference('b'))))
+            ->addArgument(new IteratorArgument([$ref2 = new Reference('b')]))
         ;
 
         $graph = $this->process($container);
@@ -118,7 +118,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
 
         $container
             ->register('b')
-            ->addArgument(new Definition(null, array($ref = new Reference('a'))))
+            ->addArgument(new Definition(null, [$ref = new Reference('a')]))
         ;
 
         $graph = $this->process($container);
@@ -137,7 +137,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
 
         $container
             ->register('b')
-            ->addArgument(new IteratorArgument(array($ref = new Reference('a'))))
+            ->addArgument(new IteratorArgument([$ref = new Reference('a')]))
         ;
 
         $graph = $this->process($container);
@@ -155,7 +155,7 @@ class AnalyzeServiceReferencesPassTest extends TestCase
         ;
 
         $factory = new Definition();
-        $factory->setFactory(array(new Reference('a'), 'a'));
+        $factory->setFactory([new Reference('a'), 'a']);
 
         $container
             ->register('b')
@@ -177,8 +177,8 @@ class AnalyzeServiceReferencesPassTest extends TestCase
         ;
         $container
             ->register('b')
-            ->addArgument(new Definition(null, array($ref1 = new Reference('a'))))
-            ->addArgument(new Definition(null, array($ref2 = new Reference('a'))))
+            ->addArgument(new Definition(null, [$ref1 = new Reference('a')]))
+            ->addArgument(new Definition(null, [$ref2 = new Reference('a')]))
         ;
 
         $graph = $this->process($container);
@@ -192,11 +192,11 @@ class AnalyzeServiceReferencesPassTest extends TestCase
 
         $container
             ->register('foo', 'stdClass')
-            ->setFactory(array('stdClass', 'getInstance'));
+            ->setFactory(['stdClass', 'getInstance']);
 
         $container
             ->register('bar', 'stdClass')
-            ->setFactory(array(new Reference('foo'), 'getInstance'));
+            ->setFactory([new Reference('foo'), 'getInstance']);
 
         $graph = $this->process($container);
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
index f76001a11a..d029636a7c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutoAliasServicePassTest.php
@@ -25,7 +25,7 @@ class AutoAliasServicePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('example')
-            ->addTag('auto_alias', array('format' => '%non_existing%.example'));
+            ->addTag('auto_alias', ['format' => '%non_existing%.example']);
 
         $pass = new AutoAliasServicePass();
         $pass->process($container);
@@ -39,7 +39,7 @@ class AutoAliasServicePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('example')
-            ->addTag('auto_alias', array());
+            ->addTag('auto_alias', []);
         $container->setParameter('existing', 'mysql');
 
         $pass = new AutoAliasServicePass();
@@ -51,7 +51,7 @@ class AutoAliasServicePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassDefault')
-            ->addTag('auto_alias', array('format' => '%existing%.example'));
+            ->addTag('auto_alias', ['format' => '%existing%.example']);
         $container->setParameter('existing', 'mysql');
 
         $pass = new AutoAliasServicePass();
@@ -65,7 +65,7 @@ class AutoAliasServicePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassDefault')
-            ->addTag('auto_alias', array('format' => '%existing%.example'));
+            ->addTag('auto_alias', ['format' => '%existing%.example']);
 
         $container->register('mysql.example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassMysql');
         $container->setParameter('existing', 'mysql');
@@ -83,7 +83,7 @@ class AutoAliasServicePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassDefault')
-            ->addTag('auto_alias', array('format' => '%existing%.example'));
+            ->addTag('auto_alias', ['format' => '%existing%.example']);
 
         $container->register('mysql.example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassMysql');
         $container->register('mariadb.example', 'Symfony\Component\DependencyInjection\Tests\Compiler\ServiceClassMariaDb');
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
index d22148fdac..d7da25a602 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php
@@ -374,22 +374,22 @@ class AutowirePassTest extends TestCase
             ->setAutowired(true)
             // set the 2nd (index 1) argument only: autowire the first and third
             // args are: A, Foo, Dunglas
-            ->setArguments(array(
+            ->setArguments([
                 1 => new Reference('foo'),
-                3 => array('bar'),
-            ));
+                3 => ['bar'],
+            ]);
 
         (new ResolveClassPass())->process($container);
         (new AutowirePass())->process($container);
 
         $definition = $container->getDefinition('multiple');
         $this->assertEquals(
-            array(
+            [
                 new TypedReference(A::class, A::class),
                 new Reference('foo'),
                 new TypedReference(Dunglas::class, Dunglas::class),
-                array('bar'),
-            ),
+                ['bar'],
+            ],
             $definition->getArguments()
         );
     }
@@ -405,7 +405,7 @@ class AutowirePassTest extends TestCase
         $container->register(A::class);
         $container->register(Dunglas::class);
         $container->register('arg_no_type_hint', __NAMESPACE__.'\MultipleArguments')
-            ->setArguments(array(1 => 'foo'))
+            ->setArguments([1 => 'foo'])
             ->setAutowired(true);
 
         (new ResolveClassPass())->process($container);
@@ -458,12 +458,12 @@ class AutowirePassTest extends TestCase
 
         $definition = $container->getDefinition('with_optional_scalar');
         $this->assertEquals(
-            array(
+            [
                 new TypedReference(A::class, A::class),
                 // use the default value
                 'default_val',
                 new TypedReference(Lille::class, Lille::class),
-            ),
+            ],
             $definition->getArguments()
         );
     }
@@ -482,10 +482,10 @@ class AutowirePassTest extends TestCase
 
         $definition = $container->getDefinition('with_optional_scalar_last');
         $this->assertEquals(
-            array(
+            [
                 new TypedReference(A::class, A::class),
                 new TypedReference(Lille::class, Lille::class),
-            ),
+            ],
             $definition->getArguments()
         );
     }
@@ -502,7 +502,7 @@ class AutowirePassTest extends TestCase
 
         $definition = $container->getDefinition('foo');
         $this->assertEquals(
-            array('foo.txt'),
+            ['foo.txt'],
             $definition->getArguments()
         );
     }
@@ -519,7 +519,7 @@ class AutowirePassTest extends TestCase
         $container
             ->register('setter_injection', SetterInjection::class)
             ->setAutowired(true)
-            ->addMethodCall('setWithCallsConfigured', array('manual_arg1', 'manual_arg2'))
+            ->addMethodCall('setWithCallsConfigured', ['manual_arg1', 'manual_arg2'])
         ;
 
         (new ResolveClassPass())->process($container);
@@ -529,18 +529,18 @@ class AutowirePassTest extends TestCase
         $methodCalls = $container->getDefinition('setter_injection')->getMethodCalls();
 
         $this->assertEquals(
-            array('setWithCallsConfigured', 'setFoo', 'setDependencies', 'setChildMethodWithoutDocBlock'),
+            ['setWithCallsConfigured', 'setFoo', 'setDependencies', 'setChildMethodWithoutDocBlock'],
             array_column($methodCalls, 0)
         );
 
         // test setWithCallsConfigured args
         $this->assertEquals(
-            array('manual_arg1', 'manual_arg2'),
+            ['manual_arg1', 'manual_arg2'],
             $methodCalls[0][1]
         );
         // test setFoo args
         $this->assertEquals(
-            array(new TypedReference(Foo::class, Foo::class)),
+            [new TypedReference(Foo::class, Foo::class)],
             $methodCalls[1][1]
         );
     }
@@ -556,7 +556,7 @@ class AutowirePassTest extends TestCase
         $container
             ->register('setter_injection', SetterInjection::class)
             ->setAutowired(true)
-            ->addMethodCall('notASetter', array())
+            ->addMethodCall('notASetter', [])
         ;
 
         (new ResolveClassPass())->process($container);
@@ -566,21 +566,21 @@ class AutowirePassTest extends TestCase
         $methodCalls = $container->getDefinition('setter_injection')->getMethodCalls();
 
         $this->assertEquals(
-            array('notASetter', 'setFoo', 'setDependencies', 'setWithCallsConfigured', 'setChildMethodWithoutDocBlock'),
+            ['notASetter', 'setFoo', 'setDependencies', 'setWithCallsConfigured', 'setChildMethodWithoutDocBlock'],
             array_column($methodCalls, 0)
         );
         $this->assertEquals(
-            array(new TypedReference(A::class, A::class)),
+            [new TypedReference(A::class, A::class)],
             $methodCalls[0][1]
         );
     }
 
     public function getCreateResourceTests()
     {
-        return array(
-            array('IdenticalClassResource', true),
-            array('ClassChangedConstructorArgs', false),
-        );
+        return [
+            ['IdenticalClassResource', true],
+            ['ClassChangedConstructorArgs', false],
+        ];
     }
 
     public function testIgnoreServiceWithClassNotExisting()
@@ -666,12 +666,12 @@ class AutowirePassTest extends TestCase
         $container->register(Lille::class);
         $container->register('foo', __NAMESPACE__.'\MultipleArgumentsOptionalScalar')
             ->setAutowired(true)
-            ->setArguments(array('', ''));
+            ->setArguments(['', '']);
 
         (new ResolveClassPass())->process($container);
         (new AutowirePass())->process($container);
 
-        $this->assertEquals(array(new TypedReference(A::class, A::class), '', new TypedReference(Lille::class, Lille::class)), $container->getDefinition('foo')->getArguments());
+        $this->assertEquals([new TypedReference(A::class, A::class), '', new TypedReference(Lille::class, Lille::class)], $container->getDefinition('foo')->getArguments());
     }
 
     public function testWithFactory()
@@ -680,13 +680,13 @@ class AutowirePassTest extends TestCase
 
         $container->register(Foo::class);
         $definition = $container->register('a', A::class)
-            ->setFactory(array(A::class, 'create'))
+            ->setFactory([A::class, 'create'])
             ->setAutowired(true);
 
         (new ResolveClassPass())->process($container);
         (new AutowirePass())->process($container);
 
-        $this->assertEquals(array(new TypedReference(Foo::class, Foo::class)), $definition->getArguments());
+        $this->assertEquals([new TypedReference(Foo::class, Foo::class)], $definition->getArguments());
     }
 
     /**
@@ -698,14 +698,14 @@ class AutowirePassTest extends TestCase
         $container = new ContainerBuilder();
 
         $foo = $container->register('foo', NotWireable::class)->setAutowired(true)
-            ->addMethodCall('setBar', array())
-            ->addMethodCall('setOptionalNotAutowireable', array())
-            ->addMethodCall('setOptionalNoTypeHint', array())
-            ->addMethodCall('setOptionalArgNoAutowireable', array())
+            ->addMethodCall('setBar', [])
+            ->addMethodCall('setOptionalNotAutowireable', [])
+            ->addMethodCall('setOptionalNoTypeHint', [])
+            ->addMethodCall('setOptionalArgNoAutowireable', [])
         ;
 
         if ($method) {
-            $foo->addMethodCall($method, array());
+            $foo->addMethodCall($method, []);
         }
 
         if (method_exists($this, 'expectException')) {
@@ -722,11 +722,11 @@ class AutowirePassTest extends TestCase
 
     public function provideNotWireableCalls()
     {
-        return array(
-            array('setNotAutowireable', 'Cannot autowire service "foo": argument "$n" of method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setNotAutowireable()" has type "Symfony\Component\DependencyInjection\Tests\Compiler\NotARealClass" but this class was not found.'),
-            array('setDifferentNamespace', 'Cannot autowire service "foo": argument "$n" of method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setDifferentNamespace()" references class "stdClass" but no such service exists.'),
-            array(null, 'Invalid service "foo": method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setProtectedMethod()" must be public.'),
-        );
+        return [
+            ['setNotAutowireable', 'Cannot autowire service "foo": argument "$n" of method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setNotAutowireable()" has type "Symfony\Component\DependencyInjection\Tests\Compiler\NotARealClass" but this class was not found.'],
+            ['setDifferentNamespace', 'Cannot autowire service "foo": argument "$n" of method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setDifferentNamespace()" references class "stdClass" but no such service exists.'],
+            [null, 'Invalid service "foo": method "Symfony\Component\DependencyInjection\Tests\Compiler\NotWireable::setProtectedMethod()" must be public.'],
+        ];
     }
 
     /**
@@ -739,7 +739,7 @@ class AutowirePassTest extends TestCase
 
         $container->register(LesTilleuls::class, LesTilleuls::class);
         $container->register('foo', NotWireable::class)->setAutowired(true)
-            ->addMethodCall('setNotAutowireableBecauseOfATypo', array())
+            ->addMethodCall('setNotAutowireableBecauseOfATypo', [])
         ;
 
         (new ResolveClassPass())->process($container);
@@ -812,7 +812,7 @@ class AutowirePassTest extends TestCase
         $pass = new AutowirePass();
         $pass->process($container);
 
-        $this->assertSame(array(), $container->getDefinition('autowired')->getArguments());
+        $this->assertSame([], $container->getDefinition('autowired')->getArguments());
     }
 
     public function testAutowireDecorator()
@@ -921,12 +921,12 @@ class AutowirePassTest extends TestCase
 
         $pass->process($container);
 
-        $expected = array(
-            array(
+        $expected = [
+            [
                 'setMultipleInstancesForOneArg',
-                array(new TypedReference(CollisionInterface::class.' $collision', CollisionInterface::class)),
-            ),
-        );
+                [new TypedReference(CollisionInterface::class.' $collision', CollisionInterface::class)],
+            ],
+        ];
         $this->assertEquals($expected, $container->getDefinition('setter_injection_collision')->getMethodCalls());
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowireRequiredMethodsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowireRequiredMethodsPassTest.php
index 07c9f9d774..644b32d204 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowireRequiredMethodsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowireRequiredMethodsPassTest.php
@@ -32,7 +32,7 @@ class AutowireRequiredMethodsPassTest extends TestCase
         $container
             ->register('setter_injection', SetterInjection::class)
             ->setAutowired(true)
-            ->addMethodCall('setWithCallsConfigured', array('manual_arg1', 'manual_arg2'));
+            ->addMethodCall('setWithCallsConfigured', ['manual_arg1', 'manual_arg2']);
 
         (new ResolveClassPass())->process($container);
         (new AutowireRequiredMethodsPass())->process($container);
@@ -40,17 +40,17 @@ class AutowireRequiredMethodsPassTest extends TestCase
         $methodCalls = $container->getDefinition('setter_injection')->getMethodCalls();
 
         $this->assertEquals(
-            array('setWithCallsConfigured', 'setFoo', 'setDependencies', 'setChildMethodWithoutDocBlock'),
+            ['setWithCallsConfigured', 'setFoo', 'setDependencies', 'setChildMethodWithoutDocBlock'],
             array_column($methodCalls, 0)
         );
 
         // test setWithCallsConfigured args
         $this->assertEquals(
-            array('manual_arg1', 'manual_arg2'),
+            ['manual_arg1', 'manual_arg2'],
             $methodCalls[0][1]
         );
         // test setFoo args
-        $this->assertEquals(array(), $methodCalls[1][1]);
+        $this->assertEquals([], $methodCalls[1][1]);
     }
 
     public function testExplicitMethodInjection()
@@ -64,7 +64,7 @@ class AutowireRequiredMethodsPassTest extends TestCase
         $container
             ->register('setter_injection', SetterInjection::class)
             ->setAutowired(true)
-            ->addMethodCall('notASetter', array());
+            ->addMethodCall('notASetter', []);
 
         (new ResolveClassPass())->process($container);
         (new AutowireRequiredMethodsPass())->process($container);
@@ -72,9 +72,9 @@ class AutowireRequiredMethodsPassTest extends TestCase
         $methodCalls = $container->getDefinition('setter_injection')->getMethodCalls();
 
         $this->assertEquals(
-            array('notASetter', 'setFoo', 'setDependencies', 'setWithCallsConfigured', 'setChildMethodWithoutDocBlock'),
+            ['notASetter', 'setFoo', 'setDependencies', 'setWithCallsConfigured', 'setChildMethodWithoutDocBlock'],
             array_column($methodCalls, 0)
         );
-        $this->assertEquals(array(), $methodCalls[0][1]);
+        $this->assertEquals([], $methodCalls[0][1]);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckArgumentsValidityPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckArgumentsValidityPassTest.php
index d121689ff9..c1e47b308e 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckArgumentsValidityPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckArgumentsValidityPassTest.php
@@ -24,20 +24,20 @@ class CheckArgumentsValidityPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $definition = $container->register('foo');
-        $definition->setArguments(array(null, 1, 'a'));
-        $definition->setMethodCalls(array(
-            array('bar', array('a', 'b')),
-            array('baz', array('c', 'd')),
-        ));
+        $definition->setArguments([null, 1, 'a']);
+        $definition->setMethodCalls([
+            ['bar', ['a', 'b']],
+            ['baz', ['c', 'd']],
+        ]);
 
         $pass = new CheckArgumentsValidityPass();
         $pass->process($container);
 
-        $this->assertEquals(array(null, 1, 'a'), $container->getDefinition('foo')->getArguments());
-        $this->assertEquals(array(
-            array('bar', array('a', 'b')),
-            array('baz', array('c', 'd')),
-        ), $container->getDefinition('foo')->getMethodCalls());
+        $this->assertEquals([null, 1, 'a'], $container->getDefinition('foo')->getArguments());
+        $this->assertEquals([
+            ['bar', ['a', 'b']],
+            ['baz', ['c', 'd']],
+        ], $container->getDefinition('foo')->getMethodCalls());
     }
 
     /**
@@ -57,19 +57,19 @@ class CheckArgumentsValidityPassTest extends TestCase
 
     public function definitionProvider()
     {
-        return array(
-            array(array(null, 'a' => 'a'), array()),
-            array(array(1 => 1), array()),
-            array(array(), array(array('baz', array(null, 'a' => 'a')))),
-            array(array(), array(array('baz', array(1 => 1)))),
-        );
+        return [
+            [[null, 'a' => 'a'], []],
+            [[1 => 1], []],
+            [[], [['baz', [null, 'a' => 'a']]]],
+            [[], [['baz', [1 => 1]]]],
+        ];
     }
 
     public function testNoException()
     {
         $container = new ContainerBuilder();
         $definition = $container->register('foo');
-        $definition->setArguments(array(null, 'a' => 'a'));
+        $definition->setArguments([null, 'a' => 'a']);
 
         $pass = new CheckArgumentsValidityPass(false);
         $pass->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
index a87dc44a9c..8423c5616b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckCircularReferencesPassTest.php
@@ -55,11 +55,11 @@ class CheckCircularReferencesPassTest extends TestCase
 
         $container
             ->register('a', 'stdClass')
-            ->setFactory(array(new Reference('b'), 'getInstance'));
+            ->setFactory([new Reference('b'), 'getInstance']);
 
         $container
             ->register('b', 'stdClass')
-            ->setFactory(array(new Reference('a'), 'getInstance'));
+            ->setFactory([new Reference('a'), 'getInstance']);
 
         $this->process($container);
     }
@@ -88,7 +88,7 @@ class CheckCircularReferencesPassTest extends TestCase
 
         $container
             ->register('b', 'stdClass')
-            ->setFactory(array(new Reference('c'), 'getInstance'));
+            ->setFactory([new Reference('c'), 'getInstance']);
 
         $container->register('c')->addArgument(new Reference('a'));
 
@@ -112,7 +112,7 @@ class CheckCircularReferencesPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('a')->addArgument(new Reference('b'));
-        $container->register('b')->addMethodCall('setA', array(new Reference('a')));
+        $container->register('b')->addMethodCall('setA', [new Reference('a')]);
 
         $this->process($container);
 
@@ -135,7 +135,7 @@ class CheckCircularReferencesPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('a')->addArgument(new Reference('b'));
-        $container->register('b')->addArgument(new IteratorArgument(array(new Reference('a'))));
+        $container->register('b')->addArgument(new IteratorArgument([new Reference('a')]));
 
         $this->process($container);
 
@@ -147,11 +147,11 @@ class CheckCircularReferencesPassTest extends TestCase
     {
         $compiler = new Compiler();
         $passConfig = $compiler->getPassConfig();
-        $passConfig->setOptimizationPasses(array(
+        $passConfig->setOptimizationPasses([
             new AnalyzeServiceReferencesPass(true),
             new CheckCircularReferencesPass(),
-        ));
-        $passConfig->setRemovingPasses(array());
+        ]);
+        $passConfig->setRemovingPasses([]);
 
         $compiler->compile($container);
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
index f698ed02dc..e1dd60b662 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckDefinitionValidityPassTest.php
@@ -55,10 +55,10 @@ class CheckDefinitionValidityPassTest extends TestCase
     public function testValidTags()
     {
         $container = new ContainerBuilder();
-        $container->register('a', 'class')->addTag('foo', array('bar' => 'baz'));
-        $container->register('b', 'class')->addTag('foo', array('bar' => null));
-        $container->register('c', 'class')->addTag('foo', array('bar' => 1));
-        $container->register('d', 'class')->addTag('foo', array('bar' => 1.1));
+        $container->register('a', 'class')->addTag('foo', ['bar' => 'baz']);
+        $container->register('b', 'class')->addTag('foo', ['bar' => null]);
+        $container->register('c', 'class')->addTag('foo', ['bar' => 1]);
+        $container->register('d', 'class')->addTag('foo', ['bar' => 1.1]);
 
         $this->process($container);
 
@@ -71,7 +71,7 @@ class CheckDefinitionValidityPassTest extends TestCase
     public function testInvalidTags()
     {
         $container = new ContainerBuilder();
-        $container->register('a', 'class')->addTag('foo', array('bar' => array('baz' => 'baz')));
+        $container->register('a', 'class')->addTag('foo', ['bar' => ['baz' => 'baz']]);
 
         $this->process($container);
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
index 30fd102e17..baedabf8d4 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CheckExceptionOnInvalidReferenceBehaviorPassTest.php
@@ -77,7 +77,7 @@ class CheckExceptionOnInvalidReferenceBehaviorPassTest extends TestCase
 
         $container
             ->register('b')
-            ->setBindings(array(new BoundArgument(new Reference('a'))))
+            ->setBindings([new BoundArgument(new Reference('a'))])
         ;
 
         $this->process($container);
@@ -93,7 +93,7 @@ class CheckExceptionOnInvalidReferenceBehaviorPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        ServiceLocatorTagPass::register($container, array('foo' => new Reference('baz')), 'bar');
+        ServiceLocatorTagPass::register($container, ['foo' => new Reference('baz')], 'bar');
 
         (new AnalyzeServiceReferencesPass())->process($container);
         (new InlineServiceDefinitionsPass())->process($container);
@@ -108,7 +108,7 @@ class CheckExceptionOnInvalidReferenceBehaviorPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        ServiceLocatorTagPass::register($container, array('foo' => new Reference('foo')), 'bar');
+        ServiceLocatorTagPass::register($container, ['foo' => new Reference('foo')], 'bar');
 
         (new AnalyzeServiceReferencesPass())->process($container);
         (new InlineServiceDefinitionsPass())->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CustomExpressionLanguageFunctionTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CustomExpressionLanguageFunctionTest.php
index ead0a4207a..13e898a867 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/CustomExpressionLanguageFunctionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/CustomExpressionLanguageFunctionTest.php
@@ -16,14 +16,14 @@ class CustomExpressionLanguageFunctionTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('test', 'stdClass')
             ->setPublic(true)
-            ->setArguments(array(new Expression('custom_func("foobar")')));
+            ->setArguments([new Expression('custom_func("foobar")')]);
 
         $container->addExpressionLanguageProvider(new class() implements ExpressionFunctionProviderInterface {
             public function getFunctions()
             {
-                return array(
+                return [
                     ExpressionFunction::fromPhp('strtolower', 'custom_func'),
-                );
+                ];
             }
         });
         $container->compile();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
index 3cad553d82..d8d7587c8d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DecoratorServicePassTest.php
@@ -130,18 +130,18 @@ class DecoratorServicePassTest extends TestCase
         $container = new ContainerBuilder();
         $container
             ->register('foo')
-            ->setTags(array('bar' => array('attr' => 'baz')))
+            ->setTags(['bar' => ['attr' => 'baz']])
         ;
         $container
             ->register('baz')
-            ->setTags(array('foobar' => array('attr' => 'bar')))
+            ->setTags(['foobar' => ['attr' => 'bar']])
             ->setDecoratedService('foo')
         ;
 
         $this->process($container);
 
         $this->assertEmpty($container->getDefinition('baz.inner')->getTags());
-        $this->assertEquals(array('bar' => array('attr' => 'baz'), 'foobar' => array('attr' => 'bar')), $container->getDefinition('baz')->getTags());
+        $this->assertEquals(['bar' => ['attr' => 'baz'], 'foobar' => ['attr' => 'bar']], $container->getDefinition('baz')->getTags());
     }
 
     public function testProcessMovesTagsFromDecoratedDefinitionToDecoratingDefinitionMultipleTimes()
@@ -150,7 +150,7 @@ class DecoratorServicePassTest extends TestCase
         $container
             ->register('foo')
             ->setPublic(true)
-            ->setTags(array('bar' => array('attr' => 'baz')))
+            ->setTags(['bar' => ['attr' => 'baz']])
         ;
         $container
             ->register('deco1')
@@ -164,7 +164,7 @@ class DecoratorServicePassTest extends TestCase
         $this->process($container);
 
         $this->assertEmpty($container->getDefinition('deco1')->getTags());
-        $this->assertEquals(array('bar' => array('attr' => 'baz')), $container->getDefinition('deco2')->getTags());
+        $this->assertEquals(['bar' => ['attr' => 'baz']], $container->getDefinition('deco2')->getTags());
     }
 
     protected function process(ContainerBuilder $container)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DefinitionErrorExceptionPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DefinitionErrorExceptionPassTest.php
index e0585e2132..ce6f0496e0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/DefinitionErrorExceptionPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/DefinitionErrorExceptionPassTest.php
@@ -29,9 +29,9 @@ class DefinitionErrorExceptionPassTest extends TestCase
         $def->addError('Things went wrong!');
         $def->addError('Now something else!');
         $container->register('foo_service_id')
-            ->setArguments(array(
+            ->setArguments([
                 $def,
-            ));
+            ]);
 
         $pass = new DefinitionErrorExceptionPass();
         $pass->process($container);
@@ -42,9 +42,9 @@ class DefinitionErrorExceptionPassTest extends TestCase
         $container = new ContainerBuilder();
         $def = new Definition();
         $container->register('foo_service_id')
-            ->setArguments(array(
+            ->setArguments([
                 $def,
-            ));
+            ]);
 
         $pass = new DefinitionErrorExceptionPass();
         $pass->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
index 595beb7e97..61df0ebfa5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/InlineServiceDefinitionsPassTest.php
@@ -32,7 +32,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
 
         $container
             ->register('service')
-            ->setArguments(array(new Reference('inlinable.service')))
+            ->setArguments([new Reference('inlinable.service')])
         ;
 
         $this->process($container);
@@ -54,7 +54,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
 
         $container
             ->register('service')
-            ->setArguments(array($ref = new Reference('foo')))
+            ->setArguments([$ref = new Reference('foo')])
         ;
 
         $this->process($container);
@@ -79,7 +79,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
 
         $container
             ->register('service')
-            ->setArguments(array(new Reference('foo'), $ref = new Reference('moo'), new Reference('bar')))
+            ->setArguments([new Reference('foo'), $ref = new Reference('moo'), new Reference('bar')])
         ;
 
         $this->process($container);
@@ -104,7 +104,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $container
             ->register('bar')
             ->setPublic(false)
-            ->addMethodCall('setFoo', array(new Reference('foo')))
+            ->addMethodCall('setFoo', [new Reference('foo')])
         ;
 
         $this->process($container);
@@ -127,7 +127,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $container
             ->register('bar')
             ->setShared(false)
-            ->addMethodCall('setFoo', array(new Reference('foo')))
+            ->addMethodCall('setFoo', [new Reference('foo')])
         ;
 
         $this->process($container);
@@ -174,7 +174,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $b = $container
             ->register('b')
             ->addArgument(new Reference('a'))
-            ->addArgument(new Definition(null, array(new Reference('a'))))
+            ->addArgument(new Definition(null, [new Reference('a')]))
         ;
 
         $this->process($container);
@@ -194,14 +194,14 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $b = $container
             ->register('b')
             ->setPublic(false)
-            ->setFactory(array(new Reference('a'), 'a'))
+            ->setFactory([new Reference('a'), 'a'])
         ;
 
         $container
             ->register('foo')
-            ->setArguments(array(
+            ->setArguments([
                 $ref = new Reference('b'),
-            ));
+            ]);
 
         $this->process($container);
 
@@ -218,15 +218,15 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $container
             ->register('b')
             ->setPublic(false)
-            ->setFactory(array(new Reference('a'), 'a'))
+            ->setFactory([new Reference('a'), 'a'])
         ;
 
         $container
             ->register('foo')
-            ->setArguments(array(
+            ->setArguments([
                     $ref1 = new Reference('b'),
                     $ref2 = new Reference('b'),
-                ))
+                ])
         ;
         $this->process($container);
 
@@ -244,19 +244,19 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $container
             ->register('b')
             ->setPublic(false)
-            ->setFactory(array(new Reference('a'), 'a'))
+            ->setFactory([new Reference('a'), 'a'])
         ;
 
         $inlineFactory = new Definition();
         $inlineFactory->setPublic(false);
-        $inlineFactory->setFactory(array(new Reference('b'), 'b'));
+        $inlineFactory->setFactory([new Reference('b'), 'b']);
 
         $container
             ->register('foo')
-            ->setArguments(array(
+            ->setArguments([
                     $ref = new Reference('b'),
                     $inlineFactory,
-                ))
+                ])
         ;
         $this->process($container);
 
@@ -275,7 +275,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
 
         $container
             ->register('service')
-            ->setArguments(array($ref = new Reference('foo')))
+            ->setArguments([$ref = new Reference('foo')])
         ;
 
         $this->process($container);
@@ -290,7 +290,7 @@ class InlineServiceDefinitionsPassTest extends TestCase
         $container
             ->register('foo')
             ->setPublic(false)
-            ->addMethodCall('foo', array($ref = new Reference('foo')))
+            ->addMethodCall('foo', [$ref = new Reference('foo')])
         ;
 
         $this->process($container);
@@ -308,11 +308,11 @@ class InlineServiceDefinitionsPassTest extends TestCase
         ;
         $container
             ->register('service-closure')
-            ->setArguments(array(new ServiceClosureArgument(new Reference('inline'))))
+            ->setArguments([new ServiceClosureArgument(new Reference('inline'))])
         ;
         $container
             ->register('iterator')
-            ->setArguments(array(new IteratorArgument(array(new Reference('inline')))))
+            ->setArguments([new IteratorArgument([new Reference('inline')])])
         ;
 
         $this->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
index 489cc866e4..b9f9d7bf36 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
@@ -99,7 +99,7 @@ class IntegrationTest extends TestCase
         $container
             ->register('a', '\stdClass')
             ->addArgument(new Reference('b'))
-            ->addMethodCall('setC', array(new Reference('c')))
+            ->addMethodCall('setC', [new Reference('c')])
             ->setPublic(true)
         ;
 
@@ -158,8 +158,8 @@ class IntegrationTest extends TestCase
         $expectedService = $container->getDefinition($expectedServiceId);
 
         // reset changes, we don't care if these differ
-        $actualService->setChanges(array());
-        $expectedService->setChanges(array());
+        $actualService->setChanges([]);
+        $expectedService->setChanges([]);
 
         $this->assertEquals($expectedService, $actualService);
     }
@@ -168,71 +168,71 @@ class IntegrationTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerForAutoconfiguration(IntegrationTestStub::class);
-        yield array(
+        yield [
             'autoconfigure_child_not_applied',
             'child_service',
             'child_service_expected',
             $container,
-        );
+        ];
 
         $container = new ContainerBuilder();
         $container->registerForAutoconfiguration(IntegrationTestStub::class);
-        yield array(
+        yield [
             'autoconfigure_parent_child',
             'child_service',
             'child_service_expected',
             $container,
-        );
+        ];
 
         $container = new ContainerBuilder();
         $container->registerForAutoconfiguration(IntegrationTestStub::class)
             ->addTag('from_autoconfigure');
-        yield array(
+        yield [
             'autoconfigure_parent_child_tags',
             'child_service',
             'child_service_expected',
             $container,
-        );
+        ];
 
-        yield array(
+        yield [
             'child_parent',
             'child_service',
             'child_service_expected',
-        );
+        ];
 
-        yield array(
+        yield [
             'defaults_child_tags',
             'child_service',
             'child_service_expected',
-        );
+        ];
 
-        yield array(
+        yield [
             'defaults_instanceof_importance',
             'main_service',
             'main_service_expected',
-        );
+        ];
 
-        yield array(
+        yield [
             'defaults_parent_child',
             'child_service',
             'child_service_expected',
-        );
+        ];
 
-        yield array(
+        yield [
             'instanceof_parent_child',
             'child_service',
             'child_service_expected',
-        );
+        ];
 
         $container = new ContainerBuilder();
         $container->registerForAutoconfiguration(IntegrationTestStub::class)
-            ->addMethodCall('setSunshine', array('supernova'));
-        yield array(
+            ->addMethodCall('setSunshine', ['supernova']);
+        yield [
             'instanceof_and_calls',
             'main_service',
             'main_service_expected',
             $container,
-        );
+        ];
     }
 }
 
@@ -240,7 +240,7 @@ class ServiceSubscriberStub implements ServiceSubscriberInterface
 {
     public static function getSubscribedServices()
     {
-        return array();
+        return [];
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
index 040f5c36c6..8d07f6223a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/MergeExtensionConfigurationPassTest.php
@@ -25,7 +25,7 @@ class MergeExtensionConfigurationPassTest extends TestCase
 {
     public function testExpressionLanguageProviderForwarding()
     {
-        $tmpProviders = array();
+        $tmpProviders = [];
 
         $extension = $this->getMockBuilder('Symfony\\Component\\DependencyInjection\\Extension\\ExtensionInterface')->getMock();
         $extension->expects($this->any())
@@ -46,18 +46,18 @@ class MergeExtensionConfigurationPassTest extends TestCase
         $provider = $this->getMockBuilder('Symfony\\Component\\ExpressionLanguage\\ExpressionFunctionProviderInterface')->getMock();
         $container = new ContainerBuilder(new ParameterBag());
         $container->registerExtension($extension);
-        $container->prependExtensionConfig('foo', array('bar' => true));
+        $container->prependExtensionConfig('foo', ['bar' => true]);
         $container->addExpressionLanguageProvider($provider);
 
         $pass = new MergeExtensionConfigurationPass();
         $pass->process($container);
 
-        $this->assertEquals(array($provider), $tmpProviders);
+        $this->assertEquals([$provider], $tmpProviders);
     }
 
     public function testExtensionLoadGetAMergeExtensionConfigurationContainerBuilderInstance()
     {
-        $extension = $this->getMockBuilder(FooExtension::class)->setMethods(array('load'))->getMock();
+        $extension = $this->getMockBuilder(FooExtension::class)->setMethods(['load'])->getMock();
         $extension->expects($this->once())
             ->method('load')
             ->with($this->isType('array'), $this->isInstanceOf(MergeExtensionConfigurationContainerBuilder::class))
@@ -65,7 +65,7 @@ class MergeExtensionConfigurationPassTest extends TestCase
 
         $container = new ContainerBuilder(new ParameterBag());
         $container->registerExtension($extension);
-        $container->prependExtensionConfig('foo', array());
+        $container->prependExtensionConfig('foo', []);
 
         $pass = new MergeExtensionConfigurationPass();
         $pass->process($container);
@@ -73,14 +73,14 @@ class MergeExtensionConfigurationPassTest extends TestCase
 
     public function testExtensionConfigurationIsTrackedByDefault()
     {
-        $extension = $this->getMockBuilder(FooExtension::class)->setMethods(array('getConfiguration'))->getMock();
+        $extension = $this->getMockBuilder(FooExtension::class)->setMethods(['getConfiguration'])->getMock();
         $extension->expects($this->exactly(2))
             ->method('getConfiguration')
             ->will($this->returnValue(new FooConfiguration()));
 
         $container = new ContainerBuilder(new ParameterBag());
         $container->registerExtension($extension);
-        $container->prependExtensionConfig('foo', array('bar' => true));
+        $container->prependExtensionConfig('foo', ['bar' => true]);
 
         $pass = new MergeExtensionConfigurationPass();
         $pass->process($container);
@@ -92,14 +92,14 @@ class MergeExtensionConfigurationPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new FooExtension());
-        $container->prependExtensionConfig('foo', array('bar' => '%env(FOO)%'));
-        $container->prependExtensionConfig('foo', array('bar' => '%env(BAR)%', 'baz' => '%env(BAZ)%'));
+        $container->prependExtensionConfig('foo', ['bar' => '%env(FOO)%']);
+        $container->prependExtensionConfig('foo', ['bar' => '%env(BAR)%', 'baz' => '%env(BAZ)%']);
 
         $pass = new MergeExtensionConfigurationPass();
         $pass->process($container);
 
-        $this->assertSame(array('BAZ', 'FOO'), array_keys($container->getParameterBag()->getEnvPlaceholders()));
-        $this->assertSame(array('BAZ' => 1, 'FOO' => 0), $container->getEnvCounters());
+        $this->assertSame(['BAZ', 'FOO'], array_keys($container->getParameterBag()->getEnvPlaceholders()));
+        $this->assertSame(['BAZ' => 1, 'FOO' => 0], $container->getEnvCounters());
     }
 
     /**
@@ -110,7 +110,7 @@ class MergeExtensionConfigurationPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new BarExtension());
-        $container->prependExtensionConfig('bar', array());
+        $container->prependExtensionConfig('bar', []);
 
         (new MergeExtensionConfigurationPass())->process($container);
     }
@@ -119,7 +119,7 @@ class MergeExtensionConfigurationPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new ThrowingExtension());
-        $container->prependExtensionConfig('throwing', array('bar' => '%env(FOO)%'));
+        $container->prependExtensionConfig('throwing', ['bar' => '%env(FOO)%']);
 
         try {
             $pass = new MergeExtensionConfigurationPass();
@@ -128,7 +128,7 @@ class MergeExtensionConfigurationPassTest extends TestCase
         } catch (\Exception $e) {
         }
 
-        $this->assertSame(array('FOO'), array_keys($container->getParameterBag()->getEnvPlaceholders()));
+        $this->assertSame(['FOO'], array_keys($container->getParameterBag()->getEnvPlaceholders()));
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/PassConfigTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/PassConfigTest.php
index c1b5149daa..f8556d3e06 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/PassConfigTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/PassConfigTest.php
@@ -23,7 +23,7 @@ class PassConfigTest extends TestCase
     public function testPassOrdering()
     {
         $config = new PassConfig();
-        $config->setBeforeOptimizationPasses(array());
+        $config->setBeforeOptimizationPasses([]);
 
         $pass1 = $this->getMockBuilder(CompilerPassInterface::class)->getMock();
         $config->addPass($pass1, PassConfig::TYPE_BEFORE_OPTIMIZATION, 10);
@@ -39,11 +39,11 @@ class PassConfigTest extends TestCase
     public function testPassOrderingWithoutPasses()
     {
         $config = new PassConfig();
-        $config->setBeforeOptimizationPasses(array());
-        $config->setAfterRemovingPasses(array());
-        $config->setBeforeRemovingPasses(array());
-        $config->setOptimizationPasses(array());
-        $config->setRemovingPasses(array());
+        $config->setBeforeOptimizationPasses([]);
+        $config->setAfterRemovingPasses([]);
+        $config->setBeforeRemovingPasses([]);
+        $config->setOptimizationPasses([]);
+        $config->setRemovingPasses([]);
 
         $this->assertEmpty($config->getBeforeOptimizationPasses());
         $this->assertEmpty($config->getAfterRemovingPasses());
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/PriorityTaggedServiceTraitTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/PriorityTaggedServiceTraitTest.php
index dffc9b97ee..57ca9af427 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/PriorityTaggedServiceTraitTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/PriorityTaggedServiceTraitTest.php
@@ -20,27 +20,27 @@ class PriorityTaggedServiceTraitTest extends TestCase
 {
     public function testThatCacheWarmersAreProcessedInPriorityOrder()
     {
-        $services = array(
-            'my_service1' => array('my_custom_tag' => array('priority' => 100)),
-            'my_service2' => array('my_custom_tag' => array('priority' => 200)),
-            'my_service3' => array('my_custom_tag' => array('priority' => -501)),
-            'my_service4' => array('my_custom_tag' => array()),
-            'my_service5' => array('my_custom_tag' => array('priority' => -1)),
-            'my_service6' => array('my_custom_tag' => array('priority' => -500)),
-            'my_service7' => array('my_custom_tag' => array('priority' => -499)),
-            'my_service8' => array('my_custom_tag' => array('priority' => 1)),
-            'my_service9' => array('my_custom_tag' => array('priority' => -2)),
-            'my_service10' => array('my_custom_tag' => array('priority' => -1000)),
-            'my_service11' => array('my_custom_tag' => array('priority' => -1001)),
-            'my_service12' => array('my_custom_tag' => array('priority' => -1002)),
-            'my_service13' => array('my_custom_tag' => array('priority' => -1003)),
-            'my_service14' => array('my_custom_tag' => array('priority' => -1000)),
-            'my_service15' => array('my_custom_tag' => array('priority' => 1)),
-            'my_service16' => array('my_custom_tag' => array('priority' => -1)),
-            'my_service17' => array('my_custom_tag' => array('priority' => 200)),
-            'my_service18' => array('my_custom_tag' => array('priority' => 100)),
-            'my_service19' => array('my_custom_tag' => array()),
-        );
+        $services = [
+            'my_service1' => ['my_custom_tag' => ['priority' => 100]],
+            'my_service2' => ['my_custom_tag' => ['priority' => 200]],
+            'my_service3' => ['my_custom_tag' => ['priority' => -501]],
+            'my_service4' => ['my_custom_tag' => []],
+            'my_service5' => ['my_custom_tag' => ['priority' => -1]],
+            'my_service6' => ['my_custom_tag' => ['priority' => -500]],
+            'my_service7' => ['my_custom_tag' => ['priority' => -499]],
+            'my_service8' => ['my_custom_tag' => ['priority' => 1]],
+            'my_service9' => ['my_custom_tag' => ['priority' => -2]],
+            'my_service10' => ['my_custom_tag' => ['priority' => -1000]],
+            'my_service11' => ['my_custom_tag' => ['priority' => -1001]],
+            'my_service12' => ['my_custom_tag' => ['priority' => -1002]],
+            'my_service13' => ['my_custom_tag' => ['priority' => -1003]],
+            'my_service14' => ['my_custom_tag' => ['priority' => -1000]],
+            'my_service15' => ['my_custom_tag' => ['priority' => 1]],
+            'my_service16' => ['my_custom_tag' => ['priority' => -1]],
+            'my_service17' => ['my_custom_tag' => ['priority' => 200]],
+            'my_service18' => ['my_custom_tag' => ['priority' => 100]],
+            'my_service19' => ['my_custom_tag' => []],
+        ];
 
         $container = new ContainerBuilder();
 
@@ -52,7 +52,7 @@ class PriorityTaggedServiceTraitTest extends TestCase
             }
         }
 
-        $expected = array(
+        $expected = [
             new Reference('my_service2'),
             new Reference('my_service17'),
             new Reference('my_service1'),
@@ -72,7 +72,7 @@ class PriorityTaggedServiceTraitTest extends TestCase
             new Reference('my_service11'),
             new Reference('my_service12'),
             new Reference('my_service13'),
-        );
+        ];
 
         $priorityTaggedServiceTraitImplementation = new PriorityTaggedServiceTraitImplementation();
 
@@ -83,7 +83,7 @@ class PriorityTaggedServiceTraitTest extends TestCase
     {
         $container = new ContainerBuilder();
         $priorityTaggedServiceTraitImplementation = new PriorityTaggedServiceTraitImplementation();
-        $this->assertEquals(array(), $priorityTaggedServiceTraitImplementation->test('my_custom_tag', $container));
+        $this->assertEquals([], $priorityTaggedServiceTraitImplementation->test('my_custom_tag', $container));
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RegisterServiceSubscribersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RegisterServiceSubscribersPassTest.php
index d520c69cca..e501d1fca3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RegisterServiceSubscribersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RegisterServiceSubscribersPassTest.php
@@ -61,7 +61,7 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('foo', TestServiceSubscriber::class)
-            ->addTag('container.service_subscriber', array('bar' => '123'))
+            ->addTag('container.service_subscriber', ['bar' => '123'])
         ;
 
         (new RegisterServiceSubscribersPass())->process($container);
@@ -86,12 +86,12 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $this->assertFalse($locator->isPublic());
         $this->assertSame(ServiceLocator::class, $locator->getClass());
 
-        $expected = array(
+        $expected = [
             TestServiceSubscriber::class => new ServiceClosureArgument(new TypedReference(TestServiceSubscriber::class, TestServiceSubscriber::class)),
             CustomDefinition::class => new ServiceClosureArgument(new TypedReference(CustomDefinition::class, CustomDefinition::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
             'bar' => new ServiceClosureArgument(new TypedReference(CustomDefinition::class, CustomDefinition::class, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, 'bar')),
             'baz' => new ServiceClosureArgument(new TypedReference(CustomDefinition::class, CustomDefinition::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE, 'baz')),
-        );
+        ];
 
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
     }
@@ -103,8 +103,8 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $container->register('foo', TestServiceSubscriber::class)
             ->setAutowired(true)
             ->addArgument(new Reference(PsrContainerInterface::class))
-            ->addTag('container.service_subscriber', array('key' => 'bar', 'id' => 'bar'))
-            ->addTag('container.service_subscriber', array('key' => 'bar', 'id' => 'baz')) // should be ignored: the first wins
+            ->addTag('container.service_subscriber', ['key' => 'bar', 'id' => 'bar'])
+            ->addTag('container.service_subscriber', ['key' => 'bar', 'id' => 'baz']) // should be ignored: the first wins
         ;
 
         (new RegisterServiceSubscribersPass())->process($container);
@@ -116,12 +116,12 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $this->assertFalse($locator->isPublic());
         $this->assertSame(ServiceLocator::class, $locator->getClass());
 
-        $expected = array(
+        $expected = [
             TestServiceSubscriber::class => new ServiceClosureArgument(new TypedReference(TestServiceSubscriber::class, TestServiceSubscriber::class)),
             CustomDefinition::class => new ServiceClosureArgument(new TypedReference(CustomDefinition::class, CustomDefinition::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
             'bar' => new ServiceClosureArgument(new TypedReference('bar', CustomDefinition::class, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, 'bar')),
             'baz' => new ServiceClosureArgument(new TypedReference(CustomDefinition::class, CustomDefinition::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE, 'baz')),
-        );
+        ];
 
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
     }
@@ -136,10 +136,10 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $container->register('foo_service', TestServiceSubscriber::class)
             ->setAutowired(true)
             ->addArgument(new Reference(PsrContainerInterface::class))
-            ->addTag('container.service_subscriber', array(
+            ->addTag('container.service_subscriber', [
                 'key' => 'test',
                 'id' => TestServiceSubscriber::class,
-            ))
+            ])
         ;
         $container->register(TestServiceSubscriber::class, TestServiceSubscriber::class);
         $container->compile();
@@ -150,7 +150,7 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('foo', TestServiceSubscriberChild::class)
-            ->addMethodCall('setContainer', array(new Reference(PsrContainerInterface::class)))
+            ->addMethodCall('setContainer', [new Reference(PsrContainerInterface::class)])
             ->addTag('container.service_subscriber')
         ;
 
@@ -160,12 +160,12 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $foo = $container->getDefinition('foo');
         $locator = $container->getDefinition((string) $foo->getMethodCalls()[0][1][0]);
 
-        $expected = array(
+        $expected = [
             TestServiceSubscriberChild::class.'::invalidDefinition' => new ServiceClosureArgument(new TypedReference('Symfony\Component\DependencyInjection\Tests\Fixtures\InvalidDefinition', 'Symfony\Component\DependencyInjection\Tests\Fixtures\InvalidDefinition', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
             TestServiceSubscriberChild::class.'::testDefinition2' => new ServiceClosureArgument(new TypedReference(TestDefinition2::class, TestDefinition2::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
             TestServiceSubscriberChild::class.'::testDefinition3' => new ServiceClosureArgument(new TypedReference(TestDefinition3::class, TestDefinition3::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
             TestServiceSubscriberParent::class.'::testDefinition1' => new ServiceClosureArgument(new TypedReference(TestDefinition1::class, TestDefinition1::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
-        );
+        ];
 
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
     }
@@ -182,7 +182,7 @@ class RegisterServiceSubscribersPassTest extends TestCase
             }
         };
         $container->register('foo', \get_class($subscriber))
-            ->addMethodCall('setContainer', array(new Reference(PsrContainerInterface::class)))
+            ->addMethodCall('setContainer', [new Reference(PsrContainerInterface::class)])
             ->addTag('container.service_subscriber');
 
         (new RegisterServiceSubscribersPass())->process($container);
@@ -191,9 +191,9 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $foo = $container->getDefinition('foo');
         $locator = $container->getDefinition((string) $foo->getMethodCalls()[0][1][0]);
 
-        $expected = array(
+        $expected = [
             \get_class($subscriber).'::getFoo' => new ServiceClosureArgument(new TypedReference('stdClass', 'stdClass', ContainerInterface::IGNORE_ON_INVALID_REFERENCE, 'foo')),
-        );
+        ];
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
     }
 
@@ -204,11 +204,11 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $subscriber = new class() implements ServiceSubscriberInterface {
             public static function getSubscribedServices()
             {
-                return array(
+                return [
                     'some.service' => 'stdClass',
                     'some_service' => 'stdClass',
                     'another_service' => 'stdClass',
-                );
+                ];
             }
         };
         $container->register('some.service', 'stdClass');
@@ -216,7 +216,7 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $container->setAlias('stdClass $some_service', 'some.service');
         $container->setAlias('stdClass $anotherService', 'some.service');
         $container->register('foo', \get_class($subscriber))
-            ->addMethodCall('setContainer', array(new Reference(PsrContainerInterface::class)))
+            ->addMethodCall('setContainer', [new Reference(PsrContainerInterface::class)])
             ->addTag('container.service_subscriber');
 
         (new RegisterServiceSubscribersPass())->process($container);
@@ -225,20 +225,20 @@ class RegisterServiceSubscribersPassTest extends TestCase
         $foo = $container->getDefinition('foo');
         $locator = $container->getDefinition((string) $foo->getMethodCalls()[0][1][0]);
 
-        $expected = array(
+        $expected = [
             'some.service' => new ServiceClosureArgument(new TypedReference('stdClass', 'stdClass', ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, 'some.service')),
             'some_service' => new ServiceClosureArgument(new TypedReference('stdClass', 'stdClass', ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, 'some_service')),
             'another_service' => new ServiceClosureArgument(new TypedReference('stdClass', 'stdClass', ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, 'anotherService')),
-        );
+        ];
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
 
         (new AutowirePass())->process($container);
 
-        $expected = array(
+        $expected = [
             'some.service' => new ServiceClosureArgument(new TypedReference('some.service', 'stdClass')),
             'some_service' => new ServiceClosureArgument(new TypedReference('stdClass $some_service', 'stdClass')),
             'another_service' => new ServiceClosureArgument(new TypedReference('stdClass $anotherService', 'stdClass')),
-        );
+        ];
         $this->assertEquals($expected, $container->getDefinition((string) $locator->getFactory()[0])->getArgument(0));
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
index 48b3139589..8b92a33e23 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/RemoveUnusedDefinitionsPassTest.php
@@ -33,7 +33,7 @@ class RemoveUnusedDefinitionsPassTest extends TestCase
         ;
         $container
             ->register('moo')
-            ->setArguments(array(new Reference('bar')))
+            ->setArguments([new Reference('bar')])
         ;
 
         $this->process($container);
@@ -52,7 +52,7 @@ class RemoveUnusedDefinitionsPassTest extends TestCase
         ;
         $container
             ->register('bar')
-            ->setArguments(array(new Reference('foo')))
+            ->setArguments([new Reference('foo')])
             ->setPublic(false)
         ;
 
@@ -71,7 +71,7 @@ class RemoveUnusedDefinitionsPassTest extends TestCase
         ;
         $container
             ->register('bar')
-            ->setArguments(array(new Definition(null, array(new Reference('foo')))))
+            ->setArguments([new Definition(null, [new Reference('foo')])])
         ;
 
         $this->process($container);
@@ -86,12 +86,12 @@ class RemoveUnusedDefinitionsPassTest extends TestCase
 
         $container
             ->register('foo', 'stdClass')
-            ->setFactory(array('stdClass', 'getInstance'))
+            ->setFactory(['stdClass', 'getInstance'])
             ->setPublic(false);
 
         $container
             ->register('bar', 'stdClass')
-            ->setFactory(array(new Reference('foo'), 'getInstance'))
+            ->setFactory([new Reference('foo'), 'getInstance'])
             ->setPublic(false);
 
         $container
@@ -111,7 +111,7 @@ class RemoveUnusedDefinitionsPassTest extends TestCase
         $container->setParameter('env(FOOBAR)', 'test');
         $container
             ->register('foo')
-            ->setArguments(array('%env(FOOBAR)%'))
+            ->setArguments(['%env(FOOBAR)%'])
             ->setPublic(false)
         ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
index 7574e7943b..f9c755c35e 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ReplaceAliasByActualDefinitionPassTest.php
@@ -26,7 +26,7 @@ class ReplaceAliasByActualDefinitionPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $aDefinition = $container->register('a', '\stdClass');
-        $aDefinition->setFactory(array(new Reference('b'), 'createA'));
+        $aDefinition->setFactory([new Reference('b'), 'createA']);
 
         $bDefinition = new Definition('\stdClass');
         $bDefinition->setPublic(false);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
index a780f95a32..43dcb4f8f1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php
@@ -30,10 +30,10 @@ class ResolveBindingsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $bindings = array(CaseSensitiveClass::class => new BoundArgument(new Reference('foo')));
+        $bindings = [CaseSensitiveClass::class => new BoundArgument(new Reference('foo'))];
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
-        $definition->setArguments(array(1 => '123'));
+        $definition->setArguments([1 => '123']);
         $definition->addMethodCall('setSensitiveClass');
         $definition->setBindings($bindings);
 
@@ -43,8 +43,8 @@ class ResolveBindingsPassTest extends TestCase
         $pass = new ResolveBindingsPass();
         $pass->process($container);
 
-        $this->assertEquals(array(new Reference('foo'), '123'), $definition->getArguments());
-        $this->assertEquals(array(array('setSensitiveClass', array(new Reference('foo')))), $definition->getMethodCalls());
+        $this->assertEquals([new Reference('foo'), '123'], $definition->getArguments());
+        $this->assertEquals([['setSensitiveClass', [new Reference('foo')]]], $definition->getMethodCalls());
     }
 
     /**
@@ -56,7 +56,7 @@ class ResolveBindingsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
-        $definition->setBindings(array('$quz' => '123'));
+        $definition->setBindings(['$quz' => '123']);
 
         $pass = new ResolveBindingsPass();
         $pass->process($container);
@@ -71,7 +71,7 @@ class ResolveBindingsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(ParentNotExists::class, ParentNotExists::class);
-        $definition->setBindings(array('$quz' => '123'));
+        $definition->setBindings(['$quz' => '123']);
 
         $pass = new ResolveBindingsPass();
         $pass->process($container);
@@ -81,7 +81,7 @@ class ResolveBindingsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $bindings = array(CaseSensitiveClass::class => new BoundArgument(new Reference('foo')));
+        $bindings = [CaseSensitiveClass::class => new BoundArgument(new Reference('foo'))];
 
         // Explicit service id
         $definition1 = $container->register('def1', NamedArgumentsDummy::class);
@@ -95,8 +95,8 @@ class ResolveBindingsPassTest extends TestCase
         $pass = new ResolveBindingsPass();
         $pass->process($container);
 
-        $this->assertEquals(array($typedRef), $container->getDefinition('def1')->getArguments());
-        $this->assertEquals(array(new Reference('foo')), $container->getDefinition('def2')->getArguments());
+        $this->assertEquals([$typedRef], $container->getDefinition('def1')->getArguments());
+        $this->assertEquals([new Reference('foo')], $container->getDefinition('def2')->getArguments());
     }
 
     public function testScalarSetter()
@@ -104,22 +104,22 @@ class ResolveBindingsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->autowire('foo', ScalarSetter::class);
-        $definition->setBindings(array('$defaultLocale' => 'fr'));
+        $definition->setBindings(['$defaultLocale' => 'fr']);
 
         (new AutowireRequiredMethodsPass())->process($container);
         (new ResolveBindingsPass())->process($container);
 
-        $this->assertEquals(array(array('setDefaultLocale', array('fr'))), $definition->getMethodCalls());
+        $this->assertEquals([['setDefaultLocale', ['fr']]], $definition->getMethodCalls());
     }
 
     public function testTupleBinding()
     {
         $container = new ContainerBuilder();
 
-        $bindings = array(
+        $bindings = [
             '$c' => new BoundArgument(new Reference('bar')),
             CaseSensitiveClass::class.'$c' => new BoundArgument(new Reference('foo')),
-        );
+        ];
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
         $definition->addMethodCall('setSensitiveClass');
@@ -129,10 +129,10 @@ class ResolveBindingsPassTest extends TestCase
         $pass = new ResolveBindingsPass();
         $pass->process($container);
 
-        $expected = array(
-            array('setSensitiveClass', array(new Reference('foo'))),
-            array('setAnotherC', array(new Reference('bar'))),
-        );
+        $expected = [
+            ['setSensitiveClass', [new Reference('foo')]],
+            ['setAnotherC', [new Reference('bar')]],
+        ];
         $this->assertEquals($expected, $definition->getMethodCalls());
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
index a1630691ea..07c1abdf5d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php
@@ -21,7 +21,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
     public function testProcess()
     {
         $container = new ContainerBuilder();
-        $container->register('parent', 'foo')->setArguments(array('moo', 'b'))->setProperty('foo', 'moo');
+        $container->register('parent', 'foo')->setArguments(['moo', 'b'])->setProperty('foo', 'moo');
         $container->setDefinition('child', new ChildDefinition('parent'))
             ->replaceArgument(0, 'a')
             ->setProperty('foo', 'bar')
@@ -33,8 +33,8 @@ class ResolveChildDefinitionsPassTest extends TestCase
         $def = $container->getDefinition('child');
         $this->assertNotInstanceOf(ChildDefinition::class, $def);
         $this->assertEquals('bar', $def->getClass());
-        $this->assertEquals(array('a', 'b'), $def->getArguments());
-        $this->assertEquals(array('foo' => 'bar'), $def->getProperties());
+        $this->assertEquals(['a', 'b'], $def->getArguments());
+        $this->assertEquals(['foo' => 'bar'], $def->getProperties());
     }
 
     public function testProcessAppendsMethodCallsAlways()
@@ -43,21 +43,21 @@ class ResolveChildDefinitionsPassTest extends TestCase
 
         $container
             ->register('parent')
-            ->addMethodCall('foo', array('bar'))
+            ->addMethodCall('foo', ['bar'])
         ;
 
         $container
             ->setDefinition('child', new ChildDefinition('parent'))
-            ->addMethodCall('bar', array('foo'))
+            ->addMethodCall('bar', ['foo'])
         ;
 
         $this->process($container);
 
         $def = $container->getDefinition('child');
-        $this->assertEquals(array(
-            array('foo', array('bar')),
-            array('bar', array('foo')),
-        ), $def->getMethodCalls());
+        $this->assertEquals([
+            ['foo', ['bar']],
+            ['bar', ['foo']],
+        ], $def->getMethodCalls());
     }
 
     public function testProcessDoesNotCopyAbstract()
@@ -114,7 +114,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
         $this->process($container);
 
         $def = $container->getDefinition('child');
-        $this->assertEquals(array(), $def->getTags());
+        $this->assertEquals([], $def->getTags());
     }
 
     public function testProcessDoesNotCopyDecoratedService()
@@ -161,7 +161,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
 
         $container
             ->register('parent', 'foo')
-            ->setArguments(array('foo', 'bar', 'c'))
+            ->setArguments(['foo', 'bar', 'c'])
         ;
 
         $container
@@ -177,7 +177,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
         $this->process($container);
 
         $def = $container->getDefinition('child2');
-        $this->assertEquals(array('a', 'b', 'c'), $def->getArguments());
+        $this->assertEquals(['a', 'b', 'c'], $def->getArguments());
         $this->assertEquals('foo', $def->getClass());
     }
 
@@ -250,10 +250,10 @@ class ResolveChildDefinitionsPassTest extends TestCase
         $container->register('parent', 'parentClass');
         $container->register('sibling', 'siblingClass')
             ->setConfigurator(new ChildDefinition('parent'), 'foo')
-            ->setFactory(array(new ChildDefinition('parent'), 'foo'))
+            ->setFactory([new ChildDefinition('parent'), 'foo'])
             ->addArgument(new ChildDefinition('parent'))
             ->setProperty('prop', new ChildDefinition('parent'))
-            ->addMethodCall('meth', array(new ChildDefinition('parent')))
+            ->addMethodCall('meth', [new ChildDefinition('parent')])
         ;
 
         $this->process($container);
@@ -291,7 +291,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
 
         $this->process($container);
 
-        $this->assertEquals(array('foo', 'foo_inner', 5), $container->getDefinition('child1')->getDecoratedService());
+        $this->assertEquals(['foo', 'foo_inner', 5], $container->getDefinition('child1')->getDecoratedService());
     }
 
     public function testDecoratedServiceCopiesDeprecatedStatusFromParent()
@@ -342,17 +342,17 @@ class ResolveChildDefinitionsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $container->register('parent', 'ParentClass')->setArguments(array(0));
-        $container->setDefinition('child', (new ChildDefinition('parent'))->setArguments(array(
+        $container->register('parent', 'ParentClass')->setArguments([0]);
+        $container->setDefinition('child', (new ChildDefinition('parent'))->setArguments([
             1,
             'index_0' => 2,
             'foo' => 3,
-        )));
+        ]));
 
         $this->process($container);
 
         $def = $container->getDefinition('child');
-        $this->assertSame(array(2, 1, 'foo' => 3), $def->getArguments());
+        $this->assertSame([2, 1, 'foo' => 3], $def->getArguments());
     }
 
     public function testBindings()
@@ -360,20 +360,20 @@ class ResolveChildDefinitionsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('parent', 'stdClass')
-            ->setBindings(array('a' => '1', 'b' => '2'))
+            ->setBindings(['a' => '1', 'b' => '2'])
         ;
 
         $child = $container->setDefinition('child', new ChildDefinition('parent'))
-            ->setBindings(array('b' => 'B', 'c' => 'C'))
+            ->setBindings(['b' => 'B', 'c' => 'C'])
         ;
 
         $this->process($container);
 
-        $bindings = array();
+        $bindings = [];
         foreach ($container->getDefinition('child')->getBindings() as $k => $v) {
             $bindings[$k] = $v->getValues()[0];
         }
-        $this->assertEquals(array('b' => 'B', 'c' => 'C', 'a' => '1'), $bindings);
+        $this->assertEquals(['b' => 'B', 'c' => 'C', 'a' => '1'], $bindings);
     }
 
     public function testSetAutoconfiguredOnServiceIsParent()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveClassPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveClassPassTest.php
index acbcf1dda2..48df3843dc 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveClassPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveClassPassTest.php
@@ -34,8 +34,8 @@ class ResolveClassPassTest extends TestCase
 
     public function provideValidClassId()
     {
-        yield array('Acme\UnknownClass');
-        yield array(CaseSensitiveClass::class);
+        yield ['Acme\UnknownClass'];
+        yield [CaseSensitiveClass::class];
     }
 
     /**
@@ -53,9 +53,9 @@ class ResolveClassPassTest extends TestCase
 
     public function provideInvalidClassId()
     {
-        yield array(\stdClass::class);
-        yield array('bar');
-        yield array('\DateTime');
+        yield [\stdClass::class];
+        yield ['bar'];
+        yield ['\DateTime'];
     }
 
     public function testNonFqcnChildDefinition()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveFactoryClassPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveFactoryClassPassTest.php
index 96453c3038..3438fad068 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveFactoryClassPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveFactoryClassPassTest.php
@@ -24,12 +24,12 @@ class ResolveFactoryClassPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $factory = $container->register('factory', 'Foo\Bar');
-        $factory->setFactory(array(null, 'create'));
+        $factory->setFactory([null, 'create']);
 
         $pass = new ResolveFactoryClassPass();
         $pass->process($container);
 
-        $this->assertSame(array('Foo\Bar', 'create'), $factory->getFactory());
+        $this->assertSame(['Foo\Bar', 'create'], $factory->getFactory());
     }
 
     public function testInlinedDefinitionFactoryIsProcessed()
@@ -37,21 +37,21 @@ class ResolveFactoryClassPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $factory = $container->register('factory');
-        $factory->setFactory(array((new Definition('Baz\Qux'))->setFactory(array(null, 'getInstance')), 'create'));
+        $factory->setFactory([(new Definition('Baz\Qux'))->setFactory([null, 'getInstance']), 'create']);
 
         $pass = new ResolveFactoryClassPass();
         $pass->process($container);
 
-        $this->assertSame(array('Baz\Qux', 'getInstance'), $factory->getFactory()[0]->getFactory());
+        $this->assertSame(['Baz\Qux', 'getInstance'], $factory->getFactory()[0]->getFactory());
     }
 
     public function provideFulfilledFactories()
     {
-        return array(
-            array(array('Foo\Bar', 'create')),
-            array(array(new Reference('foo'), 'create')),
-            array(array(new Definition('Baz'), 'create')),
-        );
+        return [
+            [['Foo\Bar', 'create']],
+            [[new Reference('foo'), 'create']],
+            [[new Definition('Baz'), 'create']],
+        ];
     }
 
     /**
@@ -80,7 +80,7 @@ class ResolveFactoryClassPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $factory = $container->register('factory');
-        $factory->setFactory(array(null, 'create'));
+        $factory->setFactory([null, 'create']);
 
         $pass = new ResolveFactoryClassPass();
         $pass->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveHotPathPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveHotPathPassTest.php
index d2ba590047..a2fece0580 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveHotPathPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveHotPathPassTest.php
@@ -26,9 +26,9 @@ class ResolveHotPathPassTest extends TestCase
 
         $container->register('foo')
             ->addTag('container.hot_path')
-            ->addArgument(new IteratorArgument(array(new Reference('lazy'))))
+            ->addArgument(new IteratorArgument([new Reference('lazy')]))
             ->addArgument(new Reference('service_container'))
-            ->addArgument(new Definition('', array(new Reference('bar'))))
+            ->addArgument(new Definition('', [new Reference('bar')]))
             ->addArgument(new Reference('baz', ContainerBuilder::IGNORE_ON_UNINITIALIZED_REFERENCE))
             ->addArgument(new Reference('missing'))
         ;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
index e794eab0dc..88cc88b9dc 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInstanceofConditionalsPassTest.php
@@ -24,10 +24,10 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
     public function testProcess()
     {
         $container = new ContainerBuilder();
-        $def = $container->register('foo', self::class)->addTag('tag')->setAutowired(true)->setChanges(array());
-        $def->setInstanceofConditionals(array(
-            parent::class => (new ChildDefinition(''))->setProperty('foo', 'bar')->addTag('baz', array('attr' => 123)),
-        ));
+        $def = $container->register('foo', self::class)->addTag('tag')->setAutowired(true)->setChanges([]);
+        $def->setInstanceofConditionals([
+            parent::class => (new ChildDefinition(''))->setProperty('foo', 'bar')->addTag('baz', ['attr' => 123]),
+        ]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
 
@@ -37,11 +37,11 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         $this->assertInstanceOf(ChildDefinition::class, $def);
         $this->assertTrue($def->isAutowired());
         $this->assertSame($parent, $def->getParent());
-        $this->assertSame(array('tag' => array(array()), 'baz' => array(array('attr' => 123))), $def->getTags());
+        $this->assertSame(['tag' => [[]], 'baz' => [['attr' => 123]]], $def->getTags());
 
         $parent = $container->getDefinition($parent);
-        $this->assertSame(array('foo' => 'bar'), $parent->getProperties());
-        $this->assertSame(array(), $parent->getTags());
+        $this->assertSame(['foo' => 'bar'], $parent->getProperties());
+        $this->assertSame([], $parent->getTags());
     }
 
     public function testProcessInheritance()
@@ -50,10 +50,10 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
 
         $def = $container
             ->register('parent', parent::class)
-            ->addMethodCall('foo', array('foo'));
-        $def->setInstanceofConditionals(array(
-            parent::class => (new ChildDefinition(''))->addMethodCall('foo', array('bar')),
-        ));
+            ->addMethodCall('foo', ['foo']);
+        $def->setInstanceofConditionals([
+            parent::class => (new ChildDefinition(''))->addMethodCall('foo', ['bar']),
+        ]);
 
         $def = (new ChildDefinition('parent'))->setClass(self::class);
         $container->setDefinition('child', $def);
@@ -61,10 +61,10 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         (new ResolveInstanceofConditionalsPass())->process($container);
         (new ResolveChildDefinitionsPass())->process($container);
 
-        $expected = array(
-            array('foo', array('bar')),
-            array('foo', array('foo')),
-        );
+        $expected = [
+            ['foo', ['bar']],
+            ['foo', ['foo']],
+        ];
 
         $this->assertSame($expected, $container->getDefinition('parent')->getMethodCalls());
         $this->assertSame($expected, $container->getDefinition('child')->getMethodCalls());
@@ -75,9 +75,9 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $def = $container->register('foo', 'stdClass');
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             'stdClass' => (new ChildDefinition(''))->setShared(false),
-        ));
+        ]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
 
@@ -91,10 +91,10 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
 
         $def = $container->register('foo', self::class)->setShared(true);
 
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             parent::class => (new ChildDefinition(''))->setLazy(true)->setShared(false),
             self::class => (new ChildDefinition(''))->setAutowired(true),
-        ));
+        ]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
         (new ResolveChildDefinitionsPass())->process($container);
@@ -109,11 +109,11 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $def = $container->register('normal_service', self::class);
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             parent::class => (new ChildDefinition(''))
                 ->addTag('local_instanceof_tag')
                 ->setFactory('locally_set_factory'),
-        ));
+        ]);
         $def->setAutoconfigured(true);
         $container->registerForAutoconfiguration(parent::class)
             ->addTag('autoconfigured_tag')
@@ -129,7 +129,7 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         // factory from the specific instanceof overrides global one
         $this->assertEquals('locally_set_factory', $def->getFactory());
         // tags are merged, the locally set one is first
-        $this->assertSame(array('local_instanceof_tag' => array(array()), 'autoconfigured_tag' => array(array())), $def->getTags());
+        $this->assertSame(['local_instanceof_tag' => [[]], 'autoconfigured_tag' => [[]]], $def->getTags());
     }
 
     public function testAutoconfigureInstanceofDoesNotDuplicateTags()
@@ -138,31 +138,31 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         $def = $container->register('normal_service', self::class);
         $def
             ->addTag('duplicated_tag')
-            ->addTag('duplicated_tag', array('and_attributes' => 1))
+            ->addTag('duplicated_tag', ['and_attributes' => 1])
         ;
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             parent::class => (new ChildDefinition(''))->addTag('duplicated_tag'),
-        ));
+        ]);
         $def->setAutoconfigured(true);
         $container->registerForAutoconfiguration(parent::class)
-            ->addTag('duplicated_tag', array('and_attributes' => 1))
+            ->addTag('duplicated_tag', ['and_attributes' => 1])
         ;
 
         (new ResolveInstanceofConditionalsPass())->process($container);
         (new ResolveChildDefinitionsPass())->process($container);
 
         $def = $container->getDefinition('normal_service');
-        $this->assertSame(array('duplicated_tag' => array(array(), array('and_attributes' => 1))), $def->getTags());
+        $this->assertSame(['duplicated_tag' => [[], ['and_attributes' => 1]]], $def->getTags());
     }
 
     public function testProcessDoesNotUseAutoconfiguredInstanceofIfNotEnabled()
     {
         $container = new ContainerBuilder();
         $def = $container->register('normal_service', self::class);
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             parent::class => (new ChildDefinition(''))
                 ->addTag('foo_tag'),
-        ));
+        ]);
         $container->registerForAutoconfiguration(parent::class)
             ->setAutowired(true);
 
@@ -181,10 +181,10 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $def = $container->register('normal_service', self::class);
-        $def->setInstanceofConditionals(array(
+        $def->setInstanceofConditionals([
             'App\\FakeInterface' => (new ChildDefinition(''))
                 ->addTag('foo_tag'),
-        ));
+        ]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
     }
@@ -208,21 +208,21 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $expected = array(
-            array('setFoo', array(
+        $expected = [
+            ['setFoo', [
                 'plain_value',
                 '%some_parameter%',
-            )),
-            array('callBar', array()),
-            array('isBaz', array()),
-        );
+            ]],
+            ['callBar', []],
+            ['isBaz', []],
+        ];
 
         $container->registerForAutoconfiguration(parent::class)->addMethodCall('setFoo', $expected[0][1]);
         $container->registerForAutoconfiguration(self::class)->addMethodCall('callBar');
 
         $def = $container->register('foo', self::class)->setAutoconfigured(true)->addMethodCall('isBaz');
         $this->assertEquals(
-            array(array('isBaz', array())),
+            [['isBaz', []]],
             $def->getMethodCalls(),
             'Definition shouldn\'t have only one method call.'
         );
@@ -255,9 +255,9 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
             ->addMethodCall('setB')
             ->setDecoratedService('foo')
             ->addTag('t')
-            ->setInstanceofConditionals(array(
+            ->setInstanceofConditionals([
                 parent::class => (new ChildDefinition(''))->addTag('bar'),
-            ))
+            ])
         ;
 
         (new ResolveInstanceofConditionalsPass())->process($container);
@@ -276,34 +276,34 @@ class ResolveInstanceofConditionalsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->registerForAutoconfiguration(self::class)
-            ->setBindings(array(
+            ->setBindings([
                 '$foo' => new BoundArgument(234, false),
                 parent::class => new BoundArgument(new Reference('foo'), false),
-            ));
+            ]);
 
         $container->register('foo', self::class)
             ->setAutoconfigured(true)
-            ->setBindings(array('$foo' => new BoundArgument(123, false)));
+            ->setBindings(['$foo' => new BoundArgument(123, false)]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
 
-        $expected = array(
+        $expected = [
             '$foo' => new BoundArgument(123, false),
             parent::class => new BoundArgument(new Reference('foo'), false),
-        );
+        ];
         $this->assertEquals($expected, $container->findDefinition('foo')->getBindings());
     }
 
     public function testBindingsOnInstanceofConditionals()
     {
         $container = new ContainerBuilder();
-        $def = $container->register('foo', self::class)->setBindings(array('$toto' => 123));
-        $def->setInstanceofConditionals(array(parent::class => new ChildDefinition('')));
+        $def = $container->register('foo', self::class)->setBindings(['$toto' => 123]);
+        $def->setInstanceofConditionals([parent::class => new ChildDefinition('')]);
 
         (new ResolveInstanceofConditionalsPass())->process($container);
 
         $bindings = $container->getDefinition('foo')->getBindings();
-        $this->assertSame(array('$toto'), array_keys($bindings));
+        $this->assertSame(['$toto'], array_keys($bindings));
         $this->assertInstanceOf(BoundArgument::class, $bindings['$toto']);
         $this->assertSame(123, $bindings['$toto']->getValues()[0]);
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
index 61bad48a54..817cc64ce3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveInvalidReferencesPassTest.php
@@ -25,17 +25,17 @@ class ResolveInvalidReferencesPassTest extends TestCase
         $container = new ContainerBuilder();
         $def = $container
             ->register('foo')
-            ->setArguments(array(
+            ->setArguments([
                 new Reference('bar', ContainerInterface::NULL_ON_INVALID_REFERENCE),
                 new Reference('baz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
-            ))
-            ->addMethodCall('foo', array(new Reference('moo', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)))
+            ])
+            ->addMethodCall('foo', [new Reference('moo', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)])
         ;
 
         $this->process($container);
 
         $arguments = $def->getArguments();
-        $this->assertSame(array(null, null), $arguments);
+        $this->assertSame([null, null], $arguments);
         $this->assertCount(0, $def->getMethodCalls());
     }
 
@@ -45,19 +45,19 @@ class ResolveInvalidReferencesPassTest extends TestCase
         $container->register('baz');
         $def = $container
             ->register('foo')
-            ->setArguments(array(
-                array(
+            ->setArguments([
+                [
                     new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                     $baz = new Reference('baz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                     new Reference('moo', ContainerInterface::NULL_ON_INVALID_REFERENCE),
-                ),
-            ))
+                ],
+            ])
         ;
 
         $this->process($container);
 
         $arguments = $def->getArguments();
-        $this->assertSame(array($baz, null), $arguments[0]);
+        $this->assertSame([$baz, null], $arguments[0]);
     }
 
     public function testProcessKeepMethodCallOnInvalidArgumentInCollectionArgument()
@@ -66,20 +66,20 @@ class ResolveInvalidReferencesPassTest extends TestCase
         $container->register('baz');
         $def = $container
             ->register('foo')
-            ->addMethodCall('foo', array(
-                array(
+            ->addMethodCall('foo', [
+                [
                     new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                     $baz = new Reference('baz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                     new Reference('moo', ContainerInterface::NULL_ON_INVALID_REFERENCE),
-                ),
-            ))
+                ],
+            ])
         ;
 
         $this->process($container);
 
         $calls = $def->getMethodCalls();
         $this->assertCount(1, $def->getMethodCalls());
-        $this->assertSame(array($baz, null), $calls[0][1][0]);
+        $this->assertSame([$baz, null], $calls[0][1][0]);
     }
 
     public function testProcessIgnoreNonExistentServices()
@@ -87,7 +87,7 @@ class ResolveInvalidReferencesPassTest extends TestCase
         $container = new ContainerBuilder();
         $def = $container
             ->register('foo')
-            ->setArguments(array(new Reference('bar')))
+            ->setArguments([new Reference('bar')])
         ;
 
         $this->process($container);
@@ -106,7 +106,7 @@ class ResolveInvalidReferencesPassTest extends TestCase
 
         $this->process($container);
 
-        $this->assertEquals(array(), $def->getProperties());
+        $this->assertEquals([], $def->getProperties());
     }
 
     public function testProcessRemovesArgumentsOnInvalid()
@@ -114,17 +114,17 @@ class ResolveInvalidReferencesPassTest extends TestCase
         $container = new ContainerBuilder();
         $def = $container
             ->register('foo')
-            ->addArgument(array(
-                array(
+            ->addArgument([
+                [
                     new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE),
                     new ServiceClosureArgument(new Reference('baz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)),
-                ),
-            ))
+                ],
+            ])
         ;
 
         $this->process($container);
 
-        $this->assertSame(array(array(array())), $def->getArguments());
+        $this->assertSame([[[]]], $def->getArguments());
     }
 
     protected function process(ContainerBuilder $container)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveNamedArgumentsPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveNamedArgumentsPassTest.php
index 48259061a9..024f7adb46 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveNamedArgumentsPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveNamedArgumentsPassTest.php
@@ -32,18 +32,18 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
-        $definition->setArguments(array(
+        $definition->setArguments([
             2 => 'http://api.example.com',
             '$apiKey' => '123',
             0 => new Reference('foo'),
-        ));
-        $definition->addMethodCall('setApiKey', array('$apiKey' => '123'));
+        ]);
+        $definition->addMethodCall('setApiKey', ['$apiKey' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
-        $this->assertEquals(array(0 => new Reference('foo'), 1 => '123', 2 => 'http://api.example.com'), $definition->getArguments());
-        $this->assertEquals(array(array('setApiKey', array('123'))), $definition->getMethodCalls());
+        $this->assertEquals([0 => new Reference('foo'), 1 => '123', 2 => 'http://api.example.com'], $definition->getArguments());
+        $this->assertEquals([['setApiKey', ['123']]], $definition->getMethodCalls());
     }
 
     public function testWithFactory()
@@ -52,13 +52,13 @@ class ResolveNamedArgumentsPassTest extends TestCase
 
         $container->register('factory', NoConstructor::class);
         $definition = $container->register('foo', NoConstructor::class)
-            ->setFactory(array(new Reference('factory'), 'create'))
-            ->setArguments(array('$apiKey' => '123'));
+            ->setFactory([new Reference('factory'), 'create'])
+            ->setArguments(['$apiKey' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
-        $this->assertSame(array(0 => '123'), $definition->getArguments());
+        $this->assertSame([0 => '123'], $definition->getArguments());
     }
 
     /**
@@ -69,7 +69,7 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NamedArgumentsDummy::class);
-        $definition->setArguments(array('$apiKey' => '123'));
+        $definition->setArguments(['$apiKey' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
@@ -83,7 +83,7 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NotExist::class, NotExist::class);
-        $definition->setArguments(array('$apiKey' => '123'));
+        $definition->setArguments(['$apiKey' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
@@ -97,7 +97,7 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NoConstructor::class, NoConstructor::class);
-        $definition->setArguments(array('$apiKey' => '123'));
+        $definition->setArguments(['$apiKey' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
@@ -112,7 +112,7 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
-        $definition->setArguments(array('$notFound' => '123'));
+        $definition->setArguments(['$notFound' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
@@ -129,8 +129,8 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container->register(FactoryDummyWithoutReturnTypes::class, FactoryDummyWithoutReturnTypes::class);
 
         $definition = $container->register(TestDefinition1::class, TestDefinition1::class);
-        $definition->setFactory(array(FactoryDummyWithoutReturnTypes::class, 'createTestDefinition1'));
-        $definition->setArguments(array('$notFound' => '123'));
+        $definition->setFactory([FactoryDummyWithoutReturnTypes::class, 'createTestDefinition1']);
+        $definition->setArguments(['$notFound' => '123']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
@@ -141,12 +141,12 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(NamedArgumentsDummy::class, NamedArgumentsDummy::class);
-        $definition->setArguments(array('$apiKey' => '123', CaseSensitiveClass::class => new Reference('foo')));
+        $definition->setArguments(['$apiKey' => '123', CaseSensitiveClass::class => new Reference('foo')]);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
-        $this->assertEquals(array(new Reference('foo'), '123'), $definition->getArguments());
+        $this->assertEquals([new Reference('foo'), '123'], $definition->getArguments());
     }
 
     public function testResolvesMultipleArgumentsOfTheSameType()
@@ -154,12 +154,12 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(SimilarArgumentsDummy::class, SimilarArgumentsDummy::class);
-        $definition->setArguments(array(CaseSensitiveClass::class => new Reference('foo'), '$token' => 'qwerty'));
+        $definition->setArguments([CaseSensitiveClass::class => new Reference('foo'), '$token' => 'qwerty']);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
-        $this->assertEquals(array(new Reference('foo'), 'qwerty', new Reference('foo')), $definition->getArguments());
+        $this->assertEquals([new Reference('foo'), 'qwerty', new Reference('foo')], $definition->getArguments());
     }
 
     public function testResolvePrioritizeNamedOverType()
@@ -167,12 +167,12 @@ class ResolveNamedArgumentsPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $definition = $container->register(SimilarArgumentsDummy::class, SimilarArgumentsDummy::class);
-        $definition->setArguments(array(CaseSensitiveClass::class => new Reference('foo'), '$token' => 'qwerty', '$class1' => new Reference('bar')));
+        $definition->setArguments([CaseSensitiveClass::class => new Reference('foo'), '$token' => 'qwerty', '$class1' => new Reference('bar')]);
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
-        $this->assertEquals(array(new Reference('bar'), 'qwerty', new Reference('foo')), $definition->getArguments());
+        $this->assertEquals([new Reference('bar'), 'qwerty', new Reference('foo')], $definition->getArguments());
     }
 
     public function testVariadics()
@@ -181,26 +181,26 @@ class ResolveNamedArgumentsPassTest extends TestCase
 
         $definition = $container->register(NamedArgumentsVariadicsDummy::class, NamedArgumentsVariadicsDummy::class);
         $definition->setArguments(
-            array(
+            [
                 '$class' => new \stdClass(),
-                '$variadics' => array(
+                '$variadics' => [
                     new Reference('foo'),
                     new Reference('bar'),
                     new Reference('baz'),
-                ),
-            )
+                ],
+            ]
         );
 
         $pass = new ResolveNamedArgumentsPass();
         $pass->process($container);
 
         $this->assertEquals(
-            array(
+            [
                 0 => new \stdClass(),
                 1 => new Reference('foo'),
                 2 => new Reference('bar'),
                 3 => new Reference('baz'),
-            ),
+            ],
             $definition->getArguments()
         );
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
index a34e007de7..5aa6471751 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveParameterPlaceHoldersPassTest.php
@@ -36,22 +36,22 @@ class ResolveParameterPlaceHoldersPassTest extends TestCase
 
     public function testFactoryParametersShouldBeResolved()
     {
-        $this->assertSame(array('FooFactory', 'getFoo'), $this->fooDefinition->getFactory());
+        $this->assertSame(['FooFactory', 'getFoo'], $this->fooDefinition->getFactory());
     }
 
     public function testArgumentParametersShouldBeResolved()
     {
-        $this->assertSame(array('bar', array('bar' => 'baz')), $this->fooDefinition->getArguments());
+        $this->assertSame(['bar', ['bar' => 'baz']], $this->fooDefinition->getArguments());
     }
 
     public function testMethodCallParametersShouldBeResolved()
     {
-        $this->assertSame(array(array('foobar', array('bar', array('bar' => 'baz')))), $this->fooDefinition->getMethodCalls());
+        $this->assertSame([['foobar', ['bar', ['bar' => 'baz']]]], $this->fooDefinition->getMethodCalls());
     }
 
     public function testPropertyParametersShouldBeResolved()
     {
-        $this->assertSame(array('bar' => 'baz'), $this->fooDefinition->getProperties());
+        $this->assertSame(['bar' => 'baz'], $this->fooDefinition->getProperties());
     }
 
     public function testFileParametersShouldBeResolved()
@@ -78,7 +78,7 @@ class ResolveParameterPlaceHoldersPassTest extends TestCase
         $containerBuilder->setParameter('foo.class', 'Foo');
         $containerBuilder->setParameter('foo.factory.class', 'FooFactory');
         $containerBuilder->setParameter('foo.arg1', 'bar');
-        $containerBuilder->setParameter('foo.arg2', array('%foo.arg1%' => 'baz'));
+        $containerBuilder->setParameter('foo.arg2', ['%foo.arg1%' => 'baz']);
         $containerBuilder->setParameter('foo.method', 'foobar');
         $containerBuilder->setParameter('foo.property.name', 'bar');
         $containerBuilder->setParameter('foo.property.value', 'baz');
@@ -86,12 +86,12 @@ class ResolveParameterPlaceHoldersPassTest extends TestCase
         $containerBuilder->setParameter('alias.id', 'bar');
 
         $fooDefinition = $containerBuilder->register('foo', '%foo.class%');
-        $fooDefinition->setFactory(array('%foo.factory.class%', 'getFoo'));
-        $fooDefinition->setArguments(array('%foo.arg1%', array('%foo.arg1%' => 'baz')));
-        $fooDefinition->addMethodCall('%foo.method%', array('%foo.arg1%', '%foo.arg2%'));
+        $fooDefinition->setFactory(['%foo.factory.class%', 'getFoo']);
+        $fooDefinition->setArguments(['%foo.arg1%', ['%foo.arg1%' => 'baz']]);
+        $fooDefinition->addMethodCall('%foo.method%', ['%foo.arg1%', '%foo.arg2%']);
         $fooDefinition->setProperty('%foo.property.name%', '%foo.property.value%');
         $fooDefinition->setFile('%foo.file%');
-        $fooDefinition->setBindings(array('$baz' => '%env(BAZ)%'));
+        $fooDefinition->setBindings(['$baz' => '%env(BAZ)%']);
 
         $containerBuilder->setAlias('%alias.id%', 'foo');
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
index 6fb619718a..55b47057b1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveReferencesToAliasesPassTest.php
@@ -26,7 +26,7 @@ class ResolveReferencesToAliasesPassTest extends TestCase
         $container->setAlias('bar', 'foo');
         $def = $container
             ->register('moo')
-            ->setArguments(array(new Reference('bar')))
+            ->setArguments([new Reference('bar')])
         ;
 
         $this->process($container);
@@ -42,7 +42,7 @@ class ResolveReferencesToAliasesPassTest extends TestCase
         $container->setAlias('moo', 'bar');
         $def = $container
             ->register('foobar')
-            ->setArguments(array(new Reference('moo')))
+            ->setArguments([new Reference('moo')])
         ;
 
         $this->process($container);
@@ -68,10 +68,10 @@ class ResolveReferencesToAliasesPassTest extends TestCase
         $container->register('factory', 'Factory');
         $container->setAlias('factory_alias', new Alias('factory'));
         $foo = new Definition();
-        $foo->setFactory(array(new Reference('factory_alias'), 'createFoo'));
+        $foo->setFactory([new Reference('factory_alias'), 'createFoo']);
         $container->setDefinition('foo', $foo);
         $bar = new Definition();
-        $bar->setFactory(array('Factory', 'createFoo'));
+        $bar->setFactory(['Factory', 'createFoo']);
         $container->setDefinition('bar', $bar);
 
         $this->process($container);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveTaggedIteratorArgumentPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveTaggedIteratorArgumentPassTest.php
index a219f86007..2322817e86 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveTaggedIteratorArgumentPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveTaggedIteratorArgumentPassTest.php
@@ -26,15 +26,15 @@ class ResolveTaggedIteratorArgumentPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('a', 'stdClass')->addTag('foo');
-        $container->register('b', 'stdClass')->addTag('foo', array('priority' => 20));
-        $container->register('c', 'stdClass')->addTag('foo', array('priority' => 10));
+        $container->register('b', 'stdClass')->addTag('foo', ['priority' => 20]);
+        $container->register('c', 'stdClass')->addTag('foo', ['priority' => 10]);
         $container->register('d', 'stdClass')->setProperty('foos', new TaggedIteratorArgument('foo'));
 
         (new ResolveTaggedIteratorArgumentPass())->process($container);
 
         $properties = $container->getDefinition('d')->getProperties();
         $expected = new TaggedIteratorArgument('foo');
-        $expected->setValues(array(new Reference('b'), new Reference('c'), new Reference('a')));
+        $expected->setValues([new Reference('b'), new Reference('c'), new Reference('a')]);
         $this->assertEquals($expected, $properties['foos']);
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
index 5157e84acf..d7e5586e0a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ServiceLocatorTagPassTest.php
@@ -48,9 +48,9 @@ class ServiceLocatorTagPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->register('foo', ServiceLocator::class)
-            ->setArguments(array(array(
+            ->setArguments([[
                 'dummy',
-            )))
+            ]])
             ->addTag('container.service_locator')
         ;
 
@@ -65,11 +65,11 @@ class ServiceLocatorTagPassTest extends TestCase
         $container->register('baz', CustomDefinition::class);
 
         $container->register('foo', ServiceLocator::class)
-            ->setArguments(array(array(
+            ->setArguments([[
                 new Reference('bar'),
                 new Reference('baz'),
                 'some.service' => new Reference('bar'),
-            )))
+            ]])
             ->addTag('container.service_locator')
         ;
 
@@ -91,10 +91,10 @@ class ServiceLocatorTagPassTest extends TestCase
         $container->register('baz', TestDefinition2::class);
 
         $container->register('foo', ServiceLocator::class)
-            ->setArguments(array(array(
+            ->setArguments([[
                 new Reference('bar'),
                 'bar' => new Reference('baz'),
-            )))
+            ]])
             ->addTag('container.service_locator')
         ;
 
@@ -114,10 +114,10 @@ class ServiceLocatorTagPassTest extends TestCase
         $container->register('baz', TestDefinition2::class);
 
         $container->register('foo', ServiceLocator::class)
-            ->setArguments(array(array(
+            ->setArguments([[
                 'bar' => new Reference('baz'),
                 new Reference('bar'),
-            )))
+            ]])
             ->addTag('container.service_locator')
         ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
index c544015d90..a3ebb1b3dd 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Compiler/ValidateEnvPlaceholdersPassTest.php
@@ -29,12 +29,12 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
         $container->setParameter('env(NULLED)', null);
         $container->setParameter('env(FLOATISH)', 3.2);
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
+        $container->prependExtensionConfig('env_extension', $expected = [
             'scalar_node' => '%env(NULLED)%',
             'scalar_node_not_empty' => '%env(FLOATISH)%',
             'int_node' => '%env(int:FOO)%',
             'float_node' => '%env(float:BAR)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
@@ -46,10 +46,10 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->setParameter('env(FLOATISH)', 3.2);
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
+        $container->prependExtensionConfig('env_extension', $expected = [
             'float_node' => '%env(FLOATISH)%',
             'string_node' => '%env(UNDEFINED)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
@@ -64,9 +64,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
+        $container->prependExtensionConfig('env_extension', $expected = [
             'bool_node' => '%env(const:BAZ)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
@@ -81,9 +81,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'int_node' => '%env(json:FOO)%',
-        ));
+        ]);
 
         $this->doProcess($container);
     }
@@ -97,9 +97,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->setParameter('env(NULLED)', null);
         $container->registerExtension(new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'int_node' => '%env(NULLED)%',
-        ));
+        ]);
 
         $this->doProcess($container);
     }
@@ -108,23 +108,23 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'int_node' => '%env(int:const:FOO)%',
             'bool_node' => true,
-        ));
-        $container->prependExtensionConfig('env_extension', array(
+        ]);
+        $container->prependExtensionConfig('env_extension', [
             'int_node' => '%env(int:BAR)%',
             'bool_node' => '%env(bool:int:BAZ)%',
             'scalar_node' => '%env(BAZ)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
-        $expected = array(
+        $expected = [
             'int_node' => '%env(int:const:FOO)%',
             'bool_node' => true,
             'scalar_node' => '%env(BAZ)%',
-        );
+        ];
 
         $this->assertSame($expected, $container->resolveEnvPlaceholders($ext->getConfig()));
     }
@@ -133,13 +133,13 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'scalar_node' => $expected = 'foo %env(BAR)% baz',
-        ));
+        ]);
 
         $this->doProcess($container);
 
-        $this->assertSame(array('scalar_node' => $expected), $container->resolveEnvPlaceholders($ext->getConfig()));
+        $this->assertSame(['scalar_node' => $expected], $container->resolveEnvPlaceholders($ext->getConfig()));
     }
 
     /**
@@ -150,9 +150,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'enum_node' => '%env(FOO)%',
-        ));
+        ]);
 
         $this->doProcess($container);
     }
@@ -165,9 +165,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'simple_array_node' => '%env(json:FOO)%',
-        ));
+        ]);
 
         $this->doProcess($container);
     }
@@ -176,22 +176,22 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
+        $container->prependExtensionConfig('env_extension', [
             'array_node' => $expected = '%env(CHILD)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
-        $this->assertSame(array('array_node' => array('child_node' => $expected)), $container->resolveEnvPlaceholders($ext->getConfig()));
+        $this->assertSame(['array_node' => ['child_node' => $expected]], $container->resolveEnvPlaceholders($ext->getConfig()));
     }
 
     public function testEnvIsNotUnset()
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
-            'array_node' => array('int_unset_at_zero' => '%env(int:CHILD)%'),
-        ));
+        $container->prependExtensionConfig('env_extension', $expected = [
+            'array_node' => ['int_unset_at_zero' => '%env(int:CHILD)%'],
+        ]);
 
         $this->doProcess($container);
 
@@ -202,9 +202,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
+        $container->prependExtensionConfig('env_extension', $expected = [
             'scalar_node_not_empty' => '%env(SOME)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
@@ -247,9 +247,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension($ext = new EnvExtension());
-        $container->prependExtensionConfig('env_extension', $expected = array(
+        $container->prependExtensionConfig('env_extension', $expected = [
             'variable_node' => '%env(SOME)%',
-        ));
+        ]);
 
         $this->doProcess($container);
 
@@ -274,8 +274,8 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->registerExtension(new EnvExtension(new ConfigurationWithArrayNodeRequiringOneElement()));
-        $container->loadFromExtension('env_extension', array());
-        $container->loadFromExtension('env_extension', array());
+        $container->loadFromExtension('env_extension', []);
+        $container->loadFromExtension('env_extension', []);
 
         $this->doProcess($container);
 
@@ -288,9 +288,9 @@ class ValidateEnvPlaceholdersPassTest extends TestCase
         $container->setParameter('env(BOOLISH)', '1');
         $container->setParameter('boolish', '%env(BOOLISH)%');
         $container->registerExtension(new EnvExtension());
-        $container->prependExtensionConfig('env_extension', array(
-            'array_node' => array('bool_force_cast' => '%boolish%'),
-        ));
+        $container->prependExtensionConfig('env_extension', [
+            'array_node' => ['bool_force_cast' => '%boolish%'],
+        ]);
 
         $container->compile(true);
 
@@ -328,7 +328,7 @@ class EnvConfiguration implements ConfigurationInterface
                 ->arrayNode('array_node')
                     ->beforeNormalization()
                         ->ifTrue(function ($value) { return !\is_array($value); })
-                        ->then(function ($value) { return array('child_node' => $value); })
+                        ->then(function ($value) { return ['child_node' => $value]; })
                     ->end()
                     ->beforeNormalization()
                         ->ifArray()
@@ -352,7 +352,7 @@ class EnvConfiguration implements ConfigurationInterface
                     ->end()
                 ->end()
                 ->arrayNode('simple_array_node')->end()
-                ->enumNode('enum_node')->values(array('a', 'b'))->end()
+                ->enumNode('enum_node')->values(['a', 'b'])->end()
                 ->variableNode('variable_node')->end()
                 ->scalarNode('string_node')
                     ->validate()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceCheckerTest.php b/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceCheckerTest.php
index a91934b3ef..fc2d85ecf9 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceCheckerTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceCheckerTest.php
@@ -30,7 +30,7 @@ class ContainerParametersResourceCheckerTest extends TestCase
 
     protected function setUp()
     {
-        $this->resource = new ContainerParametersResource(array('locales' => array('fr', 'en'), 'default_locale' => 'fr'));
+        $this->resource = new ContainerParametersResource(['locales' => ['fr', 'en'], 'default_locale' => 'fr']);
         $this->container = $this->getMockBuilder(ContainerInterface::class)->getMock();
         $this->resourceChecker = new ContainerParametersResourceChecker($this->container);
     }
@@ -52,26 +52,26 @@ class ContainerParametersResourceCheckerTest extends TestCase
 
     public function isFreshProvider()
     {
-        yield 'not fresh on missing parameter' => array(function (\PHPUnit_Framework_MockObject_MockObject $container) {
+        yield 'not fresh on missing parameter' => [function (\PHPUnit_Framework_MockObject_MockObject $container) {
             $container->method('hasParameter')->with('locales')->willReturn(false);
-        }, false);
+        }, false];
 
-        yield 'not fresh on different value' => array(function (\PHPUnit_Framework_MockObject_MockObject $container) {
-            $container->method('getParameter')->with('locales')->willReturn(array('nl', 'es'));
-        }, false);
+        yield 'not fresh on different value' => [function (\PHPUnit_Framework_MockObject_MockObject $container) {
+            $container->method('getParameter')->with('locales')->willReturn(['nl', 'es']);
+        }, false];
 
-        yield 'fresh on every identical parameters' => array(function (\PHPUnit_Framework_MockObject_MockObject $container) {
+        yield 'fresh on every identical parameters' => [function (\PHPUnit_Framework_MockObject_MockObject $container) {
             $container->expects($this->exactly(2))->method('hasParameter')->willReturn(true);
             $container->expects($this->exactly(2))->method('getParameter')
                 ->withConsecutive(
-                    array($this->equalTo('locales')),
-                    array($this->equalTo('default_locale'))
+                    [$this->equalTo('locales')],
+                    [$this->equalTo('default_locale')]
                 )
-                ->will($this->returnValueMap(array(
-                    array('locales', array('fr', 'en')),
-                    array('default_locale', 'fr'),
-                )))
+                ->will($this->returnValueMap([
+                    ['locales', ['fr', 'en']],
+                    ['default_locale', 'fr'],
+                ]))
             ;
-        }, true);
+        }, true];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceTest.php b/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceTest.php
index 4da4766f27..e177ac16b8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Config/ContainerParametersResourceTest.php
@@ -21,7 +21,7 @@ class ContainerParametersResourceTest extends TestCase
 
     protected function setUp()
     {
-        $this->resource = new ContainerParametersResource(array('locales' => array('fr', 'en'), 'default_locale' => 'fr'));
+        $this->resource = new ContainerParametersResource(['locales' => ['fr', 'en'], 'default_locale' => 'fr']);
     }
 
     public function testToString()
@@ -38,6 +38,6 @@ class ContainerParametersResourceTest extends TestCase
 
     public function testGetParameters()
     {
-        $this->assertSame(array('locales' => array('fr', 'en'), 'default_locale' => 'fr'), $this->resource->getParameters());
+        $this->assertSame(['locales' => ['fr', 'en'], 'default_locale' => 'fr'], $this->resource->getParameters());
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
index b09da4621b..83c0458e5c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
@@ -62,10 +62,10 @@ class ContainerBuilderTest extends TestCase
     public function testDefinitions()
     {
         $builder = new ContainerBuilder();
-        $definitions = array(
+        $definitions = [
             'foo' => new Definition('Bar\FooClass'),
             'bar' => new Definition('BarClass'),
-        );
+        ];
         $builder->setDefinitions($definitions);
         $this->assertEquals($definitions, $builder->getDefinitions(), '->setDefinitions() sets the service definitions');
         $this->assertTrue($builder->hasDefinition('foo'), '->hasDefinition() returns true if a service definition exists');
@@ -75,7 +75,7 @@ class ContainerBuilderTest extends TestCase
         $this->assertEquals($foo, $builder->getDefinition('foobar'), '->getDefinition() returns a service definition if defined');
         $this->assertSame($builder->setDefinition('foobar', $foo = new Definition('FooBarClass')), $foo, '->setDefinition() implements a fluid interface by returning the service reference');
 
-        $builder->addDefinitions($defs = array('foobar' => new Definition('FooBarClass')));
+        $builder->addDefinitions($defs = ['foobar' => new Definition('FooBarClass')]);
         $this->assertEquals(array_merge($definitions, $defs), $builder->getDefinitions(), '->addDefinitions() adds the service definitions');
 
         try {
@@ -150,7 +150,7 @@ class ContainerBuilderTest extends TestCase
     public function testGetThrowsCircularReferenceExceptionIfServiceHasReferenceToItself()
     {
         $builder = new ContainerBuilder();
-        $builder->register('baz', 'stdClass')->setArguments(array(new Reference('baz')));
+        $builder->register('baz', 'stdClass')->setArguments([new Reference('baz')]);
         $builder->get('baz');
     }
 
@@ -221,13 +221,13 @@ class ContainerBuilderTest extends TestCase
         $builder->bar = $bar = new \stdClass();
         $builder->register('bar', 'stdClass');
         $this->assertEquals(
-            array(
+            [
                 'service_container',
                 'foo',
                 'bar',
                 'Psr\Container\ContainerInterface',
                 'Symfony\Component\DependencyInjection\ContainerInterface',
-            ),
+            ],
             $builder->getServiceIds(),
             '->getServiceIds() returns all defined service ids'
         );
@@ -284,7 +284,7 @@ class ContainerBuilderTest extends TestCase
     public function testSetAliases()
     {
         $builder = new ContainerBuilder();
-        $builder->setAliases(array('bar' => 'foo', 'foobar' => 'foo'));
+        $builder->setAliases(['bar' => 'foo', 'foobar' => 'foo']);
 
         $aliases = $builder->getAliases();
         $this->assertArrayHasKey('bar', $aliases);
@@ -294,8 +294,8 @@ class ContainerBuilderTest extends TestCase
     public function testAddAliases()
     {
         $builder = new ContainerBuilder();
-        $builder->setAliases(array('bar' => 'foo'));
-        $builder->addAliases(array('foobar' => 'foo'));
+        $builder->setAliases(['bar' => 'foo']);
+        $builder->addAliases(['foobar' => 'foo']);
 
         $aliases = $builder->getAliases();
         $this->assertArrayHasKey('bar', $aliases);
@@ -317,7 +317,7 @@ class ContainerBuilderTest extends TestCase
         $builder = new ContainerBuilder();
 
         $aliased = new Definition('stdClass');
-        $aliased->addMethodCall('setBar', array(new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)));
+        $aliased->addMethodCall('setBar', [new Reference('bar', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)]);
         $builder->setDefinition('aliased', $aliased);
         $builder->setAlias('alias', 'aliased');
 
@@ -373,18 +373,18 @@ class ContainerBuilderTest extends TestCase
     {
         $builder = new ContainerBuilder();
         $builder->register('bar', 'stdClass');
-        $builder->register('foo1', 'Bar\FooClass')->addArgument(array('foo' => '%value%', '%value%' => 'foo', new Reference('bar'), '%%unescape_it%%'));
+        $builder->register('foo1', 'Bar\FooClass')->addArgument(['foo' => '%value%', '%value%' => 'foo', new Reference('bar'), '%%unescape_it%%']);
         $builder->setParameter('value', 'bar');
-        $this->assertEquals(array('foo' => 'bar', 'bar' => 'foo', $builder->get('bar'), '%unescape_it%'), $builder->get('foo1')->arguments, '->createService() replaces parameters and service references in the arguments provided by the service definition');
+        $this->assertEquals(['foo' => 'bar', 'bar' => 'foo', $builder->get('bar'), '%unescape_it%'], $builder->get('foo1')->arguments, '->createService() replaces parameters and service references in the arguments provided by the service definition');
     }
 
     public function testCreateServiceFactory()
     {
         $builder = new ContainerBuilder();
         $builder->register('foo', 'Bar\FooClass')->setFactory('Bar\FooClass::getInstance');
-        $builder->register('qux', 'Bar\FooClass')->setFactory(array('Bar\FooClass', 'getInstance'));
-        $builder->register('bar', 'Bar\FooClass')->setFactory(array(new Definition('Bar\FooClass'), 'getInstance'));
-        $builder->register('baz', 'Bar\FooClass')->setFactory(array(new Reference('bar'), 'getInstance'));
+        $builder->register('qux', 'Bar\FooClass')->setFactory(['Bar\FooClass', 'getInstance']);
+        $builder->register('bar', 'Bar\FooClass')->setFactory([new Definition('Bar\FooClass'), 'getInstance']);
+        $builder->register('baz', 'Bar\FooClass')->setFactory([new Reference('bar'), 'getInstance']);
 
         $this->assertTrue($builder->get('foo')->called, '->createService() calls the factory method to create the service instance');
         $this->assertTrue($builder->get('qux')->called, '->createService() calls the factory method to create the service instance');
@@ -396,38 +396,38 @@ class ContainerBuilderTest extends TestCase
     {
         $builder = new ContainerBuilder();
         $builder->register('bar', 'stdClass');
-        $builder->register('foo1', 'Bar\FooClass')->addMethodCall('setBar', array(array('%value%', new Reference('bar'))));
+        $builder->register('foo1', 'Bar\FooClass')->addMethodCall('setBar', [['%value%', new Reference('bar')]]);
         $builder->setParameter('value', 'bar');
-        $this->assertEquals(array('bar', $builder->get('bar')), $builder->get('foo1')->bar, '->createService() replaces the values in the method calls arguments');
+        $this->assertEquals(['bar', $builder->get('bar')], $builder->get('foo1')->bar, '->createService() replaces the values in the method calls arguments');
     }
 
     public function testCreateServiceMethodCallsWithEscapedParam()
     {
         $builder = new ContainerBuilder();
         $builder->register('bar', 'stdClass');
-        $builder->register('foo1', 'Bar\FooClass')->addMethodCall('setBar', array(array('%%unescape_it%%')));
+        $builder->register('foo1', 'Bar\FooClass')->addMethodCall('setBar', [['%%unescape_it%%']]);
         $builder->setParameter('value', 'bar');
-        $this->assertEquals(array('%unescape_it%'), $builder->get('foo1')->bar, '->createService() replaces the values in the method calls arguments');
+        $this->assertEquals(['%unescape_it%'], $builder->get('foo1')->bar, '->createService() replaces the values in the method calls arguments');
     }
 
     public function testCreateServiceProperties()
     {
         $builder = new ContainerBuilder();
         $builder->register('bar', 'stdClass');
-        $builder->register('foo1', 'Bar\FooClass')->setProperty('bar', array('%value%', new Reference('bar'), '%%unescape_it%%'));
+        $builder->register('foo1', 'Bar\FooClass')->setProperty('bar', ['%value%', new Reference('bar'), '%%unescape_it%%']);
         $builder->setParameter('value', 'bar');
-        $this->assertEquals(array('bar', $builder->get('bar'), '%unescape_it%'), $builder->get('foo1')->bar, '->createService() replaces the values in the properties');
+        $this->assertEquals(['bar', $builder->get('bar'), '%unescape_it%'], $builder->get('foo1')->bar, '->createService() replaces the values in the properties');
     }
 
     public function testCreateServiceConfigurator()
     {
         $builder = new ContainerBuilder();
         $builder->register('foo1', 'Bar\FooClass')->setConfigurator('sc_configure');
-        $builder->register('foo2', 'Bar\FooClass')->setConfigurator(array('%class%', 'configureStatic'));
+        $builder->register('foo2', 'Bar\FooClass')->setConfigurator(['%class%', 'configureStatic']);
         $builder->setParameter('class', 'BazClass');
         $builder->register('baz', 'BazClass');
-        $builder->register('foo3', 'Bar\FooClass')->setConfigurator(array(new Reference('baz'), 'configure'));
-        $builder->register('foo4', 'Bar\FooClass')->setConfigurator(array($builder->getDefinition('baz'), 'configure'));
+        $builder->register('foo3', 'Bar\FooClass')->setConfigurator([new Reference('baz'), 'configure']);
+        $builder->register('foo4', 'Bar\FooClass')->setConfigurator([$builder->getDefinition('baz'), 'configure']);
         $builder->register('foo5', 'Bar\FooClass')->setConfigurator('foo');
 
         $this->assertTrue($builder->get('foo1')->configured, '->createService() calls the configurator');
@@ -449,10 +449,10 @@ class ContainerBuilderTest extends TestCase
         $builder->register('bar', 'stdClass');
         $builder
             ->register('lazy_context', 'LazyContext')
-            ->setArguments(array(
-                new IteratorArgument(array('k1' => new Reference('bar'), new Reference('invalid', ContainerInterface::IGNORE_ON_INVALID_REFERENCE))),
-                new IteratorArgument(array()),
-            ))
+            ->setArguments([
+                new IteratorArgument(['k1' => new Reference('bar'), new Reference('invalid', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)]),
+                new IteratorArgument([]),
+            ])
         ;
 
         $lazyContext = $builder->get('lazy_context');
@@ -494,7 +494,7 @@ class ContainerBuilderTest extends TestCase
         $builder = new ContainerBuilder();
         $builder->setParameter('bar', 'bar');
         $builder->register('bar', 'BarClass');
-        $builder->register('foo', 'Bar\FooClass')->addArgument(array('foo' => new Expression('service("bar").foo ~ parameter("bar")')));
+        $builder->register('foo', 'Bar\FooClass')->addArgument(['foo' => new Expression('service("bar").foo ~ parameter("bar")')]);
         $this->assertEquals('foobar', $builder->get('foo')->arguments['foo']);
     }
 
@@ -503,7 +503,7 @@ class ContainerBuilderTest extends TestCase
         $builder = new ContainerBuilder();
         $builder->register('foo', 'Bar\FooClass');
         $this->assertEquals($builder->get('foo'), $builder->resolveServices(new Reference('foo')), '->resolveServices() resolves service references to service instances');
-        $this->assertEquals(array('foo' => array('foo', $builder->get('foo'))), $builder->resolveServices(array('foo' => array('foo', new Reference('foo')))), '->resolveServices() resolves service references to service instances in nested arrays');
+        $this->assertEquals(['foo' => ['foo', $builder->get('foo')]], $builder->resolveServices(['foo' => ['foo', new Reference('foo')]]), '->resolveServices() resolves service references to service instances in nested arrays');
         $this->assertEquals($builder->get('foo'), $builder->resolveServices(new Expression('service("foo")')), '->resolveServices() resolves expressions');
     }
 
@@ -531,25 +531,25 @@ class ContainerBuilderTest extends TestCase
 
     public function testMerge()
     {
-        $container = new ContainerBuilder(new ParameterBag(array('bar' => 'foo')));
+        $container = new ContainerBuilder(new ParameterBag(['bar' => 'foo']));
         $container->setResourceTracking(false);
-        $config = new ContainerBuilder(new ParameterBag(array('foo' => 'bar')));
+        $config = new ContainerBuilder(new ParameterBag(['foo' => 'bar']));
         $container->merge($config);
-        $this->assertEquals(array('bar' => 'foo', 'foo' => 'bar'), $container->getParameterBag()->all(), '->merge() merges current parameters with the loaded ones');
+        $this->assertEquals(['bar' => 'foo', 'foo' => 'bar'], $container->getParameterBag()->all(), '->merge() merges current parameters with the loaded ones');
 
-        $container = new ContainerBuilder(new ParameterBag(array('bar' => 'foo')));
+        $container = new ContainerBuilder(new ParameterBag(['bar' => 'foo']));
         $container->setResourceTracking(false);
-        $config = new ContainerBuilder(new ParameterBag(array('foo' => '%bar%')));
+        $config = new ContainerBuilder(new ParameterBag(['foo' => '%bar%']));
         $container->merge($config);
         $container->compile();
-        $this->assertEquals(array('bar' => 'foo', 'foo' => 'foo'), $container->getParameterBag()->all(), '->merge() evaluates the values of the parameters towards already defined ones');
+        $this->assertEquals(['bar' => 'foo', 'foo' => 'foo'], $container->getParameterBag()->all(), '->merge() evaluates the values of the parameters towards already defined ones');
 
-        $container = new ContainerBuilder(new ParameterBag(array('bar' => 'foo')));
+        $container = new ContainerBuilder(new ParameterBag(['bar' => 'foo']));
         $container->setResourceTracking(false);
-        $config = new ContainerBuilder(new ParameterBag(array('foo' => '%bar%', 'baz' => '%foo%')));
+        $config = new ContainerBuilder(new ParameterBag(['foo' => '%bar%', 'baz' => '%foo%']));
         $container->merge($config);
         $container->compile();
-        $this->assertEquals(array('bar' => 'foo', 'foo' => 'foo', 'baz' => 'foo'), $container->getParameterBag()->all(), '->merge() evaluates the values of the parameters towards already defined ones');
+        $this->assertEquals(['bar' => 'foo', 'foo' => 'foo', 'baz' => 'foo'], $container->getParameterBag()->all(), '->merge() evaluates the values of the parameters towards already defined ones');
 
         $container = new ContainerBuilder();
         $container->setResourceTracking(false);
@@ -559,7 +559,7 @@ class ContainerBuilderTest extends TestCase
         $config->setDefinition('baz', new Definition('BazClass'));
         $config->setAlias('alias_for_foo', 'foo');
         $container->merge($config);
-        $this->assertEquals(array('service_container', 'foo', 'bar', 'baz'), array_keys($container->getDefinitions()), '->merge() merges definitions already defined ones');
+        $this->assertEquals(['service_container', 'foo', 'bar', 'baz'], array_keys($container->getDefinitions()), '->merge() merges definitions already defined ones');
 
         $aliases = $container->getAliases();
         $this->assertArrayHasKey('alias_for_foo', $aliases);
@@ -576,16 +576,16 @@ class ContainerBuilderTest extends TestCase
         $bag = new EnvPlaceholderParameterBag();
         $bag->get('env(Foo)');
         $config = new ContainerBuilder($bag);
-        $this->assertSame(array('%env(Bar)%'), $config->resolveEnvPlaceholders(array($bag->get('env(Bar)'))));
+        $this->assertSame(['%env(Bar)%'], $config->resolveEnvPlaceholders([$bag->get('env(Bar)')]));
         $container->merge($config);
-        $this->assertEquals(array('Foo' => 0, 'Bar' => 1), $container->getEnvCounters());
+        $this->assertEquals(['Foo' => 0, 'Bar' => 1], $container->getEnvCounters());
 
         $container = new ContainerBuilder();
         $config = new ContainerBuilder();
         $childDefA = $container->registerForAutoconfiguration('AInterface');
         $childDefB = $config->registerForAutoconfiguration('BInterface');
         $container->merge($config);
-        $this->assertSame(array('AInterface' => $childDefA, 'BInterface' => $childDefB), $container->getAutoconfiguredInstanceof());
+        $this->assertSame(['AInterface' => $childDefA, 'BInterface' => $childDefB], $container->getAutoconfiguredInstanceof());
     }
 
     /**
@@ -620,7 +620,7 @@ class ContainerBuilderTest extends TestCase
     {
         $_ENV['ANOTHER_DUMMY_ENV_VAR'] = 'dummy';
 
-        $dummyArray = array('1' => 'one', '2' => 'two');
+        $dummyArray = ['1' => 'one', '2' => 'two'];
 
         $container = new ContainerBuilder();
         $container->setParameter('dummy', '%env(ANOTHER_DUMMY_ENV_VAR)%');
@@ -673,7 +673,7 @@ class ContainerBuilderTest extends TestCase
         $container->setParameter('foo', '%env(json:ARRAY)%');
         $container->compile(true);
 
-        $this->assertSame(array('foo' => 'bar'), $container->getParameter('foo'));
+        $this->assertSame(['foo' => 'bar'], $container->getParameter('foo'));
 
         putenv('ARRAY');
     }
@@ -688,7 +688,7 @@ class ContainerBuilderTest extends TestCase
         $container->setParameter('bar', '%env(DUMMY_ENV_VAR)%');
         $container->compile(true);
 
-        $this->assertSame(array('foo' => 'bar'), $container->getParameter('foo'));
+        $this->assertSame(['foo' => 'bar'], $container->getParameter('foo'));
         $this->assertSame('abc', $container->getParameter('bar'));
 
         putenv('DUMMY_ENV_VAR');
@@ -759,9 +759,9 @@ class ContainerBuilderTest extends TestCase
 
         $container->register('foo', 'stdClass')
             ->setPublic(true)
-            ->setProperties(array(
+            ->setProperties([
                 'fake' => '%env(int:FAKE)%',
-            ));
+            ]);
 
         $container->compile(true);
 
@@ -775,9 +775,9 @@ class ContainerBuilderTest extends TestCase
 
         $container->register('foo', 'stdClass')
             ->setPublic(true)
-            ->setProperties(array(
+            ->setProperties([
             'fake' => '%env(int:FAKE)%',
-        ));
+        ]);
 
         $container->compile(true);
 
@@ -789,23 +789,23 @@ class ContainerBuilderTest extends TestCase
         $container = include __DIR__.'/Fixtures/containers/container_env_in_id.php';
         $container->compile(true);
 
-        $expected = array(
+        $expected = [
             'service_container',
             'foo',
             'bar',
             'bar_%env(BAR)%',
-        );
+        ];
         $this->assertSame($expected, array_keys($container->getDefinitions()));
 
-        $expected = array(
+        $expected = [
             PsrContainerInterface::class => true,
             ContainerInterface::class => true,
             'baz_%env(BAR)%' => true,
             'bar_%env(BAR)%' => true,
-        );
+        ];
         $this->assertSame($expected, $container->getRemovedIds());
 
-        $this->assertSame(array('baz_bar'), array_keys($container->getDefinition('foo')->getArgument(1)));
+        $this->assertSame(['baz_bar'], array_keys($container->getDefinition('foo')->getArgument(1)));
     }
 
     /**
@@ -843,17 +843,17 @@ class ContainerBuilderTest extends TestCase
         $builder = new ContainerBuilder();
         $builder
             ->register('foo', 'Bar\FooClass')
-            ->addTag('foo', array('foo' => 'foo'))
-            ->addTag('bar', array('bar' => 'bar'))
-            ->addTag('foo', array('foofoo' => 'foofoo'))
+            ->addTag('foo', ['foo' => 'foo'])
+            ->addTag('bar', ['bar' => 'bar'])
+            ->addTag('foo', ['foofoo' => 'foofoo'])
         ;
-        $this->assertEquals($builder->findTaggedServiceIds('foo'), array(
-            'foo' => array(
-                array('foo' => 'foo'),
-                array('foofoo' => 'foofoo'),
-            ),
-        ), '->findTaggedServiceIds() returns an array of service ids and its tag attributes');
-        $this->assertEquals(array(), $builder->findTaggedServiceIds('foobar'), '->findTaggedServiceIds() returns an empty array if there is annotated services');
+        $this->assertEquals($builder->findTaggedServiceIds('foo'), [
+            'foo' => [
+                ['foo' => 'foo'],
+                ['foofoo' => 'foofoo'],
+            ],
+        ], '->findTaggedServiceIds() returns an array of service ids and its tag attributes');
+        $this->assertEquals([], $builder->findTaggedServiceIds('foobar'), '->findTaggedServiceIds() returns an empty array if there is annotated services');
     }
 
     public function testFindUnusedTags()
@@ -861,11 +861,11 @@ class ContainerBuilderTest extends TestCase
         $builder = new ContainerBuilder();
         $builder
             ->register('foo', 'Bar\FooClass')
-            ->addTag('kernel.event_listener', array('foo' => 'foo'))
-            ->addTag('kenrel.event_listener', array('bar' => 'bar'))
+            ->addTag('kernel.event_listener', ['foo' => 'foo'])
+            ->addTag('kenrel.event_listener', ['bar' => 'bar'])
         ;
         $builder->findTaggedServiceIds('kernel.event_listener');
-        $this->assertEquals(array('kenrel.event_listener'), $builder->findUnusedTags(), '->findUnusedTags() returns an array with unused tags');
+        $this->assertEquals(['kenrel.event_listener'], $builder->findUnusedTags(), '->findUnusedTags() returns an array with unused tags');
     }
 
     public function testFindDefinition()
@@ -969,15 +969,15 @@ class ContainerBuilderTest extends TestCase
         $container = new ContainerBuilder();
         $container->addResource($a = new FileResource(__DIR__.'/Fixtures/xml/services1.xml'));
         $container->addResource($b = new FileResource(__DIR__.'/Fixtures/xml/services2.xml'));
-        $resources = array();
+        $resources = [];
         foreach ($container->getResources() as $resource) {
             if (false === strpos($resource, '.php')) {
                 $resources[] = $resource;
             }
         }
-        $this->assertEquals(array($a, $b), $resources, '->getResources() returns an array of resources read for the current configuration');
-        $this->assertSame($container, $container->setResources(array()));
-        $this->assertEquals(array(), $container->getResources());
+        $this->assertEquals([$a, $b], $resources, '->getResources() returns an array of resources read for the current configuration');
+        $this->assertSame($container, $container->setResources([]));
+        $this->assertEquals([], $container->getResources());
     }
 
     public function testFileExists()
@@ -990,14 +990,14 @@ class ContainerBuilderTest extends TestCase
 
         $this->assertTrue($container->fileExists((string) $a) && $container->fileExists((string) $b) && $container->fileExists($dir));
 
-        $resources = array();
+        $resources = [];
         foreach ($container->getResources() as $resource) {
             if (false === strpos($resource, '.php')) {
                 $resources[] = $resource;
             }
         }
 
-        $this->assertEquals(array($A, $a, $b, $c), $resources, '->getResources() returns an array of resources read for the current configuration');
+        $this->assertEquals([$A, $a, $b, $c], $resources, '->getResources() returns an array of resources read for the current configuration');
     }
 
     public function testExtension()
@@ -1028,28 +1028,28 @@ class ContainerBuilderTest extends TestCase
     {
         $extension = $this->getMockBuilder('Symfony\\Component\\DependencyInjection\\Extension\\ExtensionInterface')->getMock();
         $extension->expects($this->exactly(2))->method('getAlias')->will($this->returnValue('project'));
-        $extension->expects($this->once())->method('load')->with(array(array('foo' => 'bar')));
+        $extension->expects($this->once())->method('load')->with([['foo' => 'bar']]);
 
         $container = new ContainerBuilder();
         $container->setResourceTracking(false);
         $container->registerExtension($extension);
-        $container->loadFromExtension('project', array('foo' => 'bar'));
+        $container->loadFromExtension('project', ['foo' => 'bar']);
         $container->compile();
     }
 
     public function testPrivateServiceUser()
     {
         $fooDefinition = new Definition('BarClass');
-        $fooUserDefinition = new Definition('BarUserClass', array(new Reference('bar')));
+        $fooUserDefinition = new Definition('BarUserClass', [new Reference('bar')]);
         $container = new ContainerBuilder();
         $container->setResourceTracking(false);
 
         $fooDefinition->setPublic(false);
 
-        $container->addDefinitions(array(
+        $container->addDefinitions([
             'bar' => $fooDefinition,
             'bar_user' => $fooUserDefinition->setPublic(true),
-        ));
+        ]);
 
         $container->compile();
         $this->assertInstanceOf('BarClass', $container->get('bar_user')->bar);
@@ -1104,15 +1104,15 @@ class ContainerBuilderTest extends TestCase
         $configs = $container->getExtensionConfig('foo');
         $this->assertEmpty($configs);
 
-        $first = array('foo' => 'bar');
+        $first = ['foo' => 'bar'];
         $container->prependExtensionConfig('foo', $first);
         $configs = $container->getExtensionConfig('foo');
-        $this->assertEquals(array($first), $configs);
+        $this->assertEquals([$first], $configs);
 
-        $second = array('ding' => 'dong');
+        $second = ['ding' => 'dong'];
         $container->prependExtensionConfig('foo', $second);
         $configs = $container->getExtensionConfig('foo');
-        $this->assertEquals(array($second, $first), $configs);
+        $this->assertEquals([$second, $first], $configs);
     }
 
     public function testAbstractAlias()
@@ -1172,7 +1172,7 @@ class ContainerBuilderTest extends TestCase
 
         $container->register('bar', 'BarClass')
             ->setProperty('foo', $definition)
-            ->addMethodCall('setBaz', array($definition));
+            ->addMethodCall('setBaz', [$definition]);
 
         $barUser = $container->get('bar_user');
         $bar = $container->get('bar');
@@ -1190,11 +1190,11 @@ class ContainerBuilderTest extends TestCase
     {
         $builder = new ContainerBuilder();
 
-        $builder->setAliases(array(
+        $builder->setAliases([
             'foo' => new Alias('app.test_class'),
             'app.test_class' => new Alias('App\\TestClass'),
             'App\\TestClass' => new Alias('app.test_class'),
-        ));
+        ]);
 
         $builder->findDefinition('foo');
     }
@@ -1305,12 +1305,12 @@ class ContainerBuilderTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('foo_service', ServiceLocator::class)
             ->setPublic(true)
-            ->addArgument(array(
+            ->addArgument([
                 'bar' => new ServiceClosureArgument(new Reference('bar_service')),
                 'baz' => new ServiceClosureArgument(new TypedReference('baz_service', 'stdClass')),
-            ))
+            ])
         ;
-        $container->register('bar_service', 'stdClass')->setArguments(array(new Reference('baz_service')))->setPublic(true);
+        $container->register('bar_service', 'stdClass')->setArguments([new Reference('baz_service')])->setPublic(true);
         $container->register('baz_service', 'stdClass')->setPublic(false);
         $container->compile();
 
@@ -1331,7 +1331,7 @@ class ContainerBuilderTest extends TestCase
         $this->assertNull($bar->closures[0]());
         $this->assertNull($bar->closures[1]());
         $this->assertNull($bar->closures[2]());
-        $this->assertSame(array(), iterator_to_array($bar->iter));
+        $this->assertSame([], iterator_to_array($bar->iter));
 
         $container = include __DIR__.'/Fixtures/containers/container_uninitialized_ref.php';
         $container->compile();
@@ -1347,7 +1347,7 @@ class ContainerBuilderTest extends TestCase
         $this->assertEquals(new \stdClass(), $bar->closures[0]());
         $this->assertNull($bar->closures[1]());
         $this->assertEquals(new \stdClass(), $bar->closures[2]());
-        $this->assertEquals(array('foo1' => new \stdClass(), 'foo3' => new \stdClass()), iterator_to_array($bar->iter));
+        $this->assertEquals(['foo1' => new \stdClass(), 'foo3' => new \stdClass()], iterator_to_array($bar->iter));
     }
 
     /**
@@ -1363,7 +1363,7 @@ class ContainerBuilderTest extends TestCase
         $foo2 = $container->get('foo2');
         $this->assertSame($foo2, $foo2->bar->foobar->foo);
 
-        $this->assertSame(array(), (array) $container->get('foobar4'));
+        $this->assertSame([], (array) $container->get('foobar4'));
 
         $foo5 = $container->get('foo5');
         $this->assertSame($foo5, $foo5->bar->foo);
@@ -1375,15 +1375,15 @@ class ContainerBuilderTest extends TestCase
         $this->assertEquals(new \stdClass(), $manager);
 
         $foo6 = $container->get('foo6');
-        $this->assertEquals((object) array('bar6' => (object) array()), $foo6);
+        $this->assertEquals((object) ['bar6' => (object) []], $foo6);
 
         $this->assertInstanceOf(\stdClass::class, $container->get('root'));
     }
 
     public function provideAlmostCircular()
     {
-        yield array('public');
-        yield array('private');
+        yield ['public'];
+        yield ['private'];
     }
 
     public function testRegisterForAutoconfiguration()
@@ -1391,7 +1391,7 @@ class ContainerBuilderTest extends TestCase
         $container = new ContainerBuilder();
         $childDefA = $container->registerForAutoconfiguration('AInterface');
         $childDefB = $container->registerForAutoconfiguration('BInterface');
-        $this->assertSame(array('AInterface' => $childDefA, 'BInterface' => $childDefB), $container->getAutoconfiguredInstanceof());
+        $this->assertSame(['AInterface' => $childDefA, 'BInterface' => $childDefB], $container->getAutoconfiguredInstanceof());
 
         // when called multiple times, the same instance is returned
         $this->assertSame($childDefA, $container->registerForAutoconfiguration('AInterface'));
@@ -1415,7 +1415,7 @@ class ContainerBuilderTest extends TestCase
         $container->register('Foo', 'stdClass')->setProperty('foo', new Reference('foo'))->setPublic(false);
         $container->register('fOO', 'stdClass')->setProperty('Foo', new Reference('Foo'))->setPublic(true);
 
-        $this->assertSame(array('service_container', 'foo', 'Foo', 'fOO', 'Psr\Container\ContainerInterface', 'Symfony\Component\DependencyInjection\ContainerInterface'), $container->getServiceIds());
+        $this->assertSame(['service_container', 'foo', 'Foo', 'fOO', 'Psr\Container\ContainerInterface', 'Symfony\Component\DependencyInjection\ContainerInterface'], $container->getServiceIds());
 
         $container->compile();
 
@@ -1425,7 +1425,7 @@ class ContainerBuilderTest extends TestCase
 
     public function testParameterWithMixedCase()
     {
-        $container = new ContainerBuilder(new ParameterBag(array('foo' => 'bar', 'FOO' => 'BAR')));
+        $container = new ContainerBuilder(new ParameterBag(['foo' => 'bar', 'FOO' => 'BAR']));
         $container->register('foo', 'stdClass')
             ->setPublic(true)
             ->setProperty('foo', '%FOO%');
@@ -1438,20 +1438,20 @@ class ContainerBuilderTest extends TestCase
     public function testArgumentsHaveHigherPriorityThanBindings()
     {
         $container = new ContainerBuilder();
-        $container->register('class.via.bindings', CaseSensitiveClass::class)->setArguments(array(
+        $container->register('class.via.bindings', CaseSensitiveClass::class)->setArguments([
             'via-bindings',
-        ));
-        $container->register('class.via.argument', CaseSensitiveClass::class)->setArguments(array(
+        ]);
+        $container->register('class.via.argument', CaseSensitiveClass::class)->setArguments([
             'via-argument',
-        ));
-        $container->register('foo', SimilarArgumentsDummy::class)->setPublic(true)->setBindings(array(
+        ]);
+        $container->register('foo', SimilarArgumentsDummy::class)->setPublic(true)->setBindings([
             CaseSensitiveClass::class => new Reference('class.via.bindings'),
             '$token' => '1234',
-        ))->setArguments(array(
+        ])->setArguments([
             '$class1' => new Reference('class.via.argument'),
-        ));
+        ]);
 
-        $this->assertSame(array('service_container', 'class.via.bindings', 'class.via.argument', 'foo', 'Psr\Container\ContainerInterface', 'Symfony\Component\DependencyInjection\ContainerInterface'), $container->getServiceIds());
+        $this->assertSame(['service_container', 'class.via.bindings', 'class.via.argument', 'foo', 'Psr\Container\ContainerInterface', 'Symfony\Component\DependencyInjection\ContainerInterface'], $container->getServiceIds());
 
         $container->compile();
 
@@ -1468,10 +1468,10 @@ class ContainerBuilderTest extends TestCase
 
         $container->compile();
 
-        $this->assertEquals((object) array('foo' => null), $container->get('bar'));
+        $this->assertEquals((object) ['foo' => null], $container->get('bar'));
 
-        $container->set('foo', (object) array(123));
-        $this->assertEquals((object) array('foo' => (object) array(123)), $container->get('bar'));
+        $container->set('foo', (object) [123]);
+        $this->assertEquals((object) ['foo' => (object) [123]], $container->get('bar'));
     }
 
     public function testIdCanBeAnObjectAsLongAsItCanBeCastToString()
@@ -1547,7 +1547,7 @@ class ContainerBuilderTest extends TestCase
 
         $container->compile();
 
-        $this->assertSame(array('service_container'), array_keys($container->getDefinitions()));
+        $this->assertSame(['service_container'], array_keys($container->getDefinitions()));
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
index ce0f6d101c..e81bf5636f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php
@@ -26,8 +26,8 @@ class ContainerTest extends TestCase
         $sc = new Container();
         $this->assertSame($sc, $sc->get('service_container'), '__construct() automatically registers itself as a service');
 
-        $sc = new Container(new ParameterBag(array('foo' => 'bar')));
-        $this->assertEquals(array('foo' => 'bar'), $sc->getParameterBag()->all(), '__construct() takes an array of parameters as its first argument');
+        $sc = new Container(new ParameterBag(['foo' => 'bar']));
+        $this->assertEquals(['foo' => 'bar'], $sc->getParameterBag()->all(), '__construct() takes an array of parameters as its first argument');
     }
 
     /**
@@ -40,18 +40,18 @@ class ContainerTest extends TestCase
 
     public function dataForTestCamelize()
     {
-        return array(
-            array('foo_bar', 'FooBar'),
-            array('foo.bar', 'Foo_Bar'),
-            array('foo.bar_baz', 'Foo_BarBaz'),
-            array('foo._bar', 'Foo_Bar'),
-            array('foo_.bar', 'Foo_Bar'),
-            array('_foo', 'Foo'),
-            array('.foo', '_Foo'),
-            array('foo_', 'Foo'),
-            array('foo.', 'Foo_'),
-            array('foo\bar', 'Foo_Bar'),
-        );
+        return [
+            ['foo_bar', 'FooBar'],
+            ['foo.bar', 'Foo_Bar'],
+            ['foo.bar_baz', 'Foo_BarBaz'],
+            ['foo._bar', 'Foo_Bar'],
+            ['foo_.bar', 'Foo_Bar'],
+            ['_foo', 'Foo'],
+            ['.foo', '_Foo'],
+            ['foo_', 'Foo'],
+            ['foo.', 'Foo_'],
+            ['foo\bar', 'Foo_Bar'],
+        ];
     }
 
     /**
@@ -64,29 +64,29 @@ class ContainerTest extends TestCase
 
     public function dataForTestUnderscore()
     {
-        return array(
-            array('FooBar', 'foo_bar'),
-            array('Foo_Bar', 'foo.bar'),
-            array('Foo_BarBaz', 'foo.bar_baz'),
-            array('FooBar_BazQux', 'foo_bar.baz_qux'),
-            array('_Foo', '.foo'),
-            array('Foo_', 'foo.'),
-        );
+        return [
+            ['FooBar', 'foo_bar'],
+            ['Foo_Bar', 'foo.bar'],
+            ['Foo_BarBaz', 'foo.bar_baz'],
+            ['FooBar_BazQux', 'foo_bar.baz_qux'],
+            ['_Foo', '.foo'],
+            ['Foo_', 'foo.'],
+        ];
     }
 
     public function testCompile()
     {
-        $sc = new Container(new ParameterBag(array('foo' => 'bar')));
+        $sc = new Container(new ParameterBag(['foo' => 'bar']));
         $this->assertFalse($sc->getParameterBag()->isResolved(), '->compile() resolves the parameter bag');
         $sc->compile();
         $this->assertTrue($sc->getParameterBag()->isResolved(), '->compile() resolves the parameter bag');
         $this->assertInstanceOf('Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag', $sc->getParameterBag(), '->compile() changes the parameter bag to a FrozenParameterBag instance');
-        $this->assertEquals(array('foo' => 'bar'), $sc->getParameterBag()->all(), '->compile() copies the current parameters to the new parameter bag');
+        $this->assertEquals(['foo' => 'bar'], $sc->getParameterBag()->all(), '->compile() copies the current parameters to the new parameter bag');
     }
 
     public function testIsCompiled()
     {
-        $sc = new Container(new ParameterBag(array('foo' => 'bar')));
+        $sc = new Container(new ParameterBag(['foo' => 'bar']));
         $this->assertFalse($sc->isCompiled(), '->isCompiled() returns false if the container is not compiled');
         $sc->compile();
         $this->assertTrue($sc->isCompiled(), '->isCompiled() returns true if the container is compiled');
@@ -94,19 +94,19 @@ class ContainerTest extends TestCase
 
     public function testIsCompiledWithFrozenParameters()
     {
-        $sc = new Container(new FrozenParameterBag(array('foo' => 'bar')));
+        $sc = new Container(new FrozenParameterBag(['foo' => 'bar']));
         $this->assertFalse($sc->isCompiled(), '->isCompiled() returns false if the container is not compiled but the parameter bag is already frozen');
     }
 
     public function testGetParameterBag()
     {
         $sc = new Container();
-        $this->assertEquals(array(), $sc->getParameterBag()->all(), '->getParameterBag() returns an empty array if no parameter has been defined');
+        $this->assertEquals([], $sc->getParameterBag()->all(), '->getParameterBag() returns an empty array if no parameter has been defined');
     }
 
     public function testGetSetParameter()
     {
-        $sc = new Container(new ParameterBag(array('foo' => 'bar')));
+        $sc = new Container(new ParameterBag(['foo' => 'bar']));
         $sc->setParameter('bar', 'foo');
         $this->assertEquals('foo', $sc->getParameter('bar'), '->setParameter() sets the value of a new parameter');
 
@@ -124,7 +124,7 @@ class ContainerTest extends TestCase
 
     public function testGetSetParameterWithMixedCase()
     {
-        $sc = new Container(new ParameterBag(array('foo' => 'bar')));
+        $sc = new Container(new ParameterBag(['foo' => 'bar']));
 
         $sc->setParameter('Foo', 'baz1');
         $this->assertEquals('bar', $sc->getParameter('foo'));
@@ -136,11 +136,11 @@ class ContainerTest extends TestCase
         $sc = new Container();
         $sc->set('foo', $obj = new \stdClass());
         $sc->set('bar', $obj = new \stdClass());
-        $this->assertEquals(array('service_container', 'foo', 'bar'), $sc->getServiceIds(), '->getServiceIds() returns all defined service ids');
+        $this->assertEquals(['service_container', 'foo', 'bar'], $sc->getServiceIds(), '->getServiceIds() returns all defined service ids');
 
         $sc = new ProjectServiceContainer();
         $sc->set('foo', $obj = new \stdClass());
-        $this->assertEquals(array('service_container', 'bar', 'foo_bar', 'foo.baz', 'circular', 'throw_exception', 'throws_exception_on_service_configuration', 'internal_dependency', 'foo'), $sc->getServiceIds(), '->getServiceIds() returns defined service ids by factory methods in the method map, followed by service ids defined by set()');
+        $this->assertEquals(['service_container', 'bar', 'foo_bar', 'foo.baz', 'circular', 'throw_exception', 'throws_exception_on_service_configuration', 'internal_dependency', 'foo'], $sc->getServiceIds(), '->getServiceIds() returns defined service ids by factory methods in the method map, followed by service ids defined by set()');
     }
 
     public function testSet()
@@ -220,7 +220,7 @@ class ContainerTest extends TestCase
         $sc->set('foo', $foo1 = new \stdClass());
         $sc->set('Foo', $foo2 = new \stdClass());
 
-        $this->assertSame(array('service_container', 'foo', 'Foo'), $sc->getServiceIds());
+        $this->assertSame(['service_container', 'foo', 'Foo'], $sc->getServiceIds());
         $this->assertSame($foo1, $sc->get('foo'), '->get() returns the service for the given id, case sensitively');
         $this->assertSame($foo2, $sc->get('Foo'), '->get() returns the service for the given id, case sensitively');
     }
@@ -422,7 +422,7 @@ class ProjectServiceContainer extends Container
     public $__foo_baz;
     public $__internal;
     protected $privates;
-    protected $methodMap = array(
+    protected $methodMap = [
         'bar' => 'getBarService',
         'foo_bar' => 'getFooBarService',
         'foo.baz' => 'getFoo_BazService',
@@ -430,7 +430,7 @@ class ProjectServiceContainer extends Container
         'throw_exception' => 'getThrowExceptionService',
         'throws_exception_on_service_configuration' => 'getThrowsExceptionOnServiceConfigurationService',
         'internal_dependency' => 'getInternalDependencyService',
-    );
+    ];
 
     public function __construct()
     {
@@ -440,8 +440,8 @@ class ProjectServiceContainer extends Container
         $this->__foo_bar = new \stdClass();
         $this->__foo_baz = new \stdClass();
         $this->__internal = new \stdClass();
-        $this->privates = array();
-        $this->aliases = array('alias' => 'bar');
+        $this->privates = [];
+        $this->aliases = ['alias' => 'bar'];
     }
 
     protected function getInternalService()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php b/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
index c15104c66d..12e9ebe422 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/CrossCheckTest.php
@@ -57,11 +57,11 @@ class CrossCheckTest extends TestCase
         $this->assertEquals($container2->getParameterBag()->all(), $container1->getParameterBag()->all(), '->getParameterBag() returns the same value for both containers');
         $this->assertEquals(serialize($container2), serialize($container1), 'loading a dump from a previously loaded container returns the same container');
 
-        $services1 = array();
+        $services1 = [];
         foreach ($container1 as $id => $service) {
             $services1[$id] = serialize($service);
         }
-        $services2 = array();
+        $services2 = [];
         foreach ($container2 as $id => $service) {
             $services2[$id] = serialize($service);
         }
@@ -73,17 +73,17 @@ class CrossCheckTest extends TestCase
 
     public function crossCheckLoadersDumpers()
     {
-        return array(
-            array('services1.xml', 'xml'),
-            array('services2.xml', 'xml'),
-            array('services6.xml', 'xml'),
-            array('services8.xml', 'xml'),
-            array('services9.xml', 'xml'),
-            array('services1.yml', 'yaml'),
-            array('services2.yml', 'yaml'),
-            array('services6.yml', 'yaml'),
-            array('services8.yml', 'yaml'),
-            array('services9.yml', 'yaml'),
-        );
+        return [
+            ['services1.xml', 'xml'],
+            ['services2.xml', 'xml'],
+            ['services6.xml', 'xml'],
+            ['services8.xml', 'xml'],
+            ['services9.xml', 'xml'],
+            ['services1.yml', 'yaml'],
+            ['services2.yml', 'yaml'],
+            ['services6.yml', 'yaml'],
+            ['services8.yml', 'yaml'],
+            ['services9.yml', 'yaml'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
index b0c1e63d0c..947c1d56a4 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/DefinitionTest.php
@@ -20,10 +20,10 @@ class DefinitionTest extends TestCase
     {
         $def = new Definition('stdClass');
         $this->assertEquals('stdClass', $def->getClass(), '__construct() takes the class name as its first argument');
-        $this->assertSame(array('class' => true), $def->getChanges());
+        $this->assertSame(['class' => true], $def->getChanges());
 
-        $def = new Definition('stdClass', array('foo'));
-        $this->assertEquals(array('foo'), $def->getArguments(), '__construct() takes an optional array of arguments as its second argument');
+        $def = new Definition('stdClass', ['foo']);
+        $this->assertEquals(['foo'], $def->getArguments(), '__construct() takes an optional array of arguments as its second argument');
     }
 
     public function testSetGetFactory()
@@ -34,8 +34,8 @@ class DefinitionTest extends TestCase
         $this->assertEquals('foo', $def->getFactory(), '->getFactory() returns the factory');
 
         $def->setFactory('Foo::bar');
-        $this->assertEquals(array('Foo', 'bar'), $def->getFactory(), '->setFactory() converts string static method call to the array');
-        $this->assertSame(array('factory' => true), $def->getChanges());
+        $this->assertEquals(['Foo', 'bar'], $def->getFactory(), '->setFactory() converts string static method call to the array');
+        $this->assertSame(['factory' => true], $def->getChanges());
     }
 
     public function testSetGetClass()
@@ -50,20 +50,20 @@ class DefinitionTest extends TestCase
         $def = new Definition('stdClass');
         $this->assertNull($def->getDecoratedService());
         $def->setDecoratedService('foo', 'foo.renamed', 5);
-        $this->assertEquals(array('foo', 'foo.renamed', 5), $def->getDecoratedService());
+        $this->assertEquals(['foo', 'foo.renamed', 5], $def->getDecoratedService());
         $def->setDecoratedService(null);
         $this->assertNull($def->getDecoratedService());
 
         $def = new Definition('stdClass');
         $this->assertNull($def->getDecoratedService());
         $def->setDecoratedService('foo', 'foo.renamed');
-        $this->assertEquals(array('foo', 'foo.renamed', 0), $def->getDecoratedService());
+        $this->assertEquals(['foo', 'foo.renamed', 0], $def->getDecoratedService());
         $def->setDecoratedService(null);
         $this->assertNull($def->getDecoratedService());
 
         $def = new Definition('stdClass');
         $def->setDecoratedService('foo');
-        $this->assertEquals(array('foo', null, 0), $def->getDecoratedService());
+        $this->assertEquals(['foo', null, 0], $def->getDecoratedService());
         $def->setDecoratedService(null);
         $this->assertNull($def->getDecoratedService());
 
@@ -82,23 +82,23 @@ class DefinitionTest extends TestCase
     public function testArguments()
     {
         $def = new Definition('stdClass');
-        $this->assertSame($def, $def->setArguments(array('foo')), '->setArguments() implements a fluent interface');
-        $this->assertEquals(array('foo'), $def->getArguments(), '->getArguments() returns the arguments');
+        $this->assertSame($def, $def->setArguments(['foo']), '->setArguments() implements a fluent interface');
+        $this->assertEquals(['foo'], $def->getArguments(), '->getArguments() returns the arguments');
         $this->assertSame($def, $def->addArgument('bar'), '->addArgument() implements a fluent interface');
-        $this->assertEquals(array('foo', 'bar'), $def->getArguments(), '->addArgument() adds an argument');
+        $this->assertEquals(['foo', 'bar'], $def->getArguments(), '->addArgument() adds an argument');
     }
 
     public function testMethodCalls()
     {
         $def = new Definition('stdClass');
-        $this->assertSame($def, $def->setMethodCalls(array(array('foo', array('foo')))), '->setMethodCalls() implements a fluent interface');
-        $this->assertEquals(array(array('foo', array('foo'))), $def->getMethodCalls(), '->getMethodCalls() returns the methods to call');
-        $this->assertSame($def, $def->addMethodCall('bar', array('bar')), '->addMethodCall() implements a fluent interface');
-        $this->assertEquals(array(array('foo', array('foo')), array('bar', array('bar'))), $def->getMethodCalls(), '->addMethodCall() adds a method to call');
+        $this->assertSame($def, $def->setMethodCalls([['foo', ['foo']]]), '->setMethodCalls() implements a fluent interface');
+        $this->assertEquals([['foo', ['foo']]], $def->getMethodCalls(), '->getMethodCalls() returns the methods to call');
+        $this->assertSame($def, $def->addMethodCall('bar', ['bar']), '->addMethodCall() implements a fluent interface');
+        $this->assertEquals([['foo', ['foo']], ['bar', ['bar']]], $def->getMethodCalls(), '->addMethodCall() adds a method to call');
         $this->assertTrue($def->hasMethodCall('bar'), '->hasMethodCall() returns true if first argument is a method to call registered');
         $this->assertFalse($def->hasMethodCall('no_registered'), '->hasMethodCall() returns false if first argument is not a method to call registered');
         $this->assertSame($def, $def->removeMethodCall('bar'), '->removeMethodCall() implements a fluent interface');
-        $this->assertEquals(array(array('foo', array('foo'))), $def->getMethodCalls(), '->removeMethodCall() removes a method to call');
+        $this->assertEquals([['foo', ['foo']]], $def->getMethodCalls(), '->removeMethodCall() removes a method to call');
     }
 
     /**
@@ -179,12 +179,12 @@ class DefinitionTest extends TestCase
 
     public function invalidDeprecationMessageProvider()
     {
-        return array(
-            "With \rs" => array("invalid \r message %service_id%"),
-            "With \ns" => array("invalid \n message %service_id%"),
-            'With */s' => array('invalid */ message %service_id%'),
-            'message not containing require %service_id% variable' => array('this is deprecated'),
-        );
+        return [
+            "With \rs" => ["invalid \r message %service_id%"],
+            "With \ns" => ["invalid \n message %service_id%"],
+            'With */s' => ['invalid */ message %service_id%'],
+            'message not containing require %service_id% variable' => ['this is deprecated'],
+        ];
     }
 
     public function testSetGetConfigurator()
@@ -198,18 +198,18 @@ class DefinitionTest extends TestCase
     {
         $def = new Definition('stdClass');
         $this->assertSame($def, $def->clearTags(), '->clearTags() implements a fluent interface');
-        $def->addTag('foo', array('foo' => 'bar'));
+        $def->addTag('foo', ['foo' => 'bar']);
         $def->clearTags();
-        $this->assertEquals(array(), $def->getTags(), '->clearTags() removes all current tags');
+        $this->assertEquals([], $def->getTags(), '->clearTags() removes all current tags');
     }
 
     public function testClearTag()
     {
         $def = new Definition('stdClass');
         $this->assertSame($def, $def->clearTags(), '->clearTags() implements a fluent interface');
-        $def->addTag('1foo1', array('foo1' => 'bar1'));
-        $def->addTag('2foo2', array('foo2' => 'bar2'));
-        $def->addTag('3foo3', array('foo3' => 'bar3'));
+        $def->addTag('1foo1', ['foo1' => 'bar1']);
+        $def->addTag('2foo2', ['foo2' => 'bar2']);
+        $def->addTag('3foo3', ['foo3' => 'bar3']);
         $def->clearTag('2foo2');
         $this->assertTrue($def->hasTag('1foo1'));
         $this->assertFalse($def->hasTag('2foo2'));
@@ -222,18 +222,18 @@ class DefinitionTest extends TestCase
     public function testTags()
     {
         $def = new Definition('stdClass');
-        $this->assertEquals(array(), $def->getTag('foo'), '->getTag() returns an empty array if the tag is not defined');
+        $this->assertEquals([], $def->getTag('foo'), '->getTag() returns an empty array if the tag is not defined');
         $this->assertFalse($def->hasTag('foo'));
         $this->assertSame($def, $def->addTag('foo'), '->addTag() implements a fluent interface');
         $this->assertTrue($def->hasTag('foo'));
-        $this->assertEquals(array(array()), $def->getTag('foo'), '->getTag() returns attributes for a tag name');
-        $def->addTag('foo', array('foo' => 'bar'));
-        $this->assertEquals(array(array(), array('foo' => 'bar')), $def->getTag('foo'), '->addTag() can adds the same tag several times');
-        $def->addTag('bar', array('bar' => 'bar'));
-        $this->assertEquals($def->getTags(), array(
-            'foo' => array(array(), array('foo' => 'bar')),
-            'bar' => array(array('bar' => 'bar')),
-        ), '->getTags() returns all tags');
+        $this->assertEquals([[]], $def->getTag('foo'), '->getTag() returns attributes for a tag name');
+        $def->addTag('foo', ['foo' => 'bar']);
+        $this->assertEquals([[], ['foo' => 'bar']], $def->getTag('foo'), '->addTag() can adds the same tag several times');
+        $def->addTag('bar', ['bar' => 'bar']);
+        $this->assertEquals($def->getTags(), [
+            'foo' => [[], ['foo' => 'bar']],
+            'bar' => [['bar' => 'bar']],
+        ], '->getTags() returns all tags');
     }
 
     public function testSetArgument()
@@ -241,17 +241,17 @@ class DefinitionTest extends TestCase
         $def = new Definition('stdClass');
 
         $def->addArgument('foo');
-        $this->assertSame(array('foo'), $def->getArguments());
+        $this->assertSame(['foo'], $def->getArguments());
 
         $this->assertSame($def, $def->replaceArgument(0, 'moo'));
-        $this->assertSame(array('moo'), $def->getArguments());
+        $this->assertSame(['moo'], $def->getArguments());
 
         $def->addArgument('moo');
         $def
             ->replaceArgument(0, 'foo')
             ->replaceArgument(1, 'bar')
         ;
-        $this->assertSame(array('foo', 'bar'), $def->getArguments());
+        $this->assertSame(['foo', 'bar'], $def->getArguments());
     }
 
     /**
@@ -291,18 +291,18 @@ class DefinitionTest extends TestCase
     {
         $def = new Definition('stdClass');
 
-        $this->assertEquals(array(), $def->getProperties());
-        $this->assertSame($def, $def->setProperties(array('foo' => 'bar')));
-        $this->assertEquals(array('foo' => 'bar'), $def->getProperties());
+        $this->assertEquals([], $def->getProperties());
+        $this->assertSame($def, $def->setProperties(['foo' => 'bar']));
+        $this->assertEquals(['foo' => 'bar'], $def->getProperties());
     }
 
     public function testSetProperty()
     {
         $def = new Definition('stdClass');
 
-        $this->assertEquals(array(), $def->getProperties());
+        $this->assertEquals([], $def->getProperties());
         $this->assertSame($def, $def->setProperty('foo', 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $def->getProperties());
+        $this->assertEquals(['foo' => 'bar'], $def->getProperties());
     }
 
     public function testAutowired()
@@ -321,12 +321,12 @@ class DefinitionTest extends TestCase
     {
         $def = new Definition();
 
-        $this->assertSame(array(), $def->getChanges());
+        $this->assertSame([], $def->getChanges());
     }
 
     public function testGetChangesWithChanges()
     {
-        $def = new Definition('stdClass', array('fooarg'));
+        $def = new Definition('stdClass', ['fooarg']);
 
         $def->setAbstract(true);
         $def->setAutowired(true);
@@ -340,13 +340,13 @@ class DefinitionTest extends TestCase
         $def->setShared(true);
         $def->setSynthetic(true);
         // changes aren't tracked for these, class or arguments
-        $def->setInstanceofConditionals(array());
+        $def->setInstanceofConditionals([]);
         $def->addTag('foo_tag');
         $def->addMethodCall('methodCall');
         $def->setProperty('fooprop', true);
         $def->setAutoconfigured(true);
 
-        $this->assertSame(array(
+        $this->assertSame([
             'class' => true,
             'autowired' => true,
             'configurator' => true,
@@ -358,10 +358,10 @@ class DefinitionTest extends TestCase
             'public' => true,
             'shared' => true,
             'autoconfigured' => true,
-        ), $def->getChanges());
+        ], $def->getChanges());
 
-        $def->setChanges(array());
-        $this->assertSame(array(), $def->getChanges());
+        $def->setChanges([]);
+        $this->assertSame([], $def->getChanges());
     }
 
     public function testShouldAutoconfigure()
@@ -378,6 +378,6 @@ class DefinitionTest extends TestCase
         $this->assertFalse($def->hasErrors());
         $def->addError('First error');
         $def->addError('Second error');
-        $this->assertSame(array('First error', 'Second error'), $def->getErrors());
+        $this->assertSame(['First error', 'Second error'], $def->getErrors());
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
index 3c40bb5504..ea11c7c533 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/GraphvizDumperTest.php
@@ -42,14 +42,14 @@ class GraphvizDumperTest extends TestCase
 
         $container = include self::$fixturesPath.'/containers/container10.php';
         $dumper = new GraphvizDumper($container);
-        $this->assertEquals($dumper->dump(array(
-            'graph' => array('ratio' => 'normal'),
-            'node' => array('fontsize' => 13, 'fontname' => 'Verdana', 'shape' => 'square'),
-            'edge' => array('fontsize' => 12, 'fontname' => 'Verdana', 'color' => 'white', 'arrowhead' => 'closed', 'arrowsize' => 1),
-            'node.instance' => array('fillcolor' => 'green', 'style' => 'empty'),
-            'node.definition' => array('fillcolor' => 'grey'),
-            'node.missing' => array('fillcolor' => 'red', 'style' => 'empty'),
-        )), file_get_contents(self::$fixturesPath.'/graphviz/services10-1.dot'), '->dump() dumps services');
+        $this->assertEquals($dumper->dump([
+            'graph' => ['ratio' => 'normal'],
+            'node' => ['fontsize' => 13, 'fontname' => 'Verdana', 'shape' => 'square'],
+            'edge' => ['fontsize' => 12, 'fontname' => 'Verdana', 'color' => 'white', 'arrowhead' => 'closed', 'arrowsize' => 1],
+            'node.instance' => ['fillcolor' => 'green', 'style' => 'empty'],
+            'node.definition' => ['fillcolor' => 'grey'],
+            'node.missing' => ['fillcolor' => 'red', 'style' => 'empty'],
+        ]), file_get_contents(self::$fixturesPath.'/graphviz/services10-1.dot'), '->dump() dumps services');
     }
 
     public function testDumpWithFrozenContainer()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
index 2063c25910..a296f8cde9 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php
@@ -55,14 +55,14 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
 
         $this->assertStringEqualsFile(self::$fixturesPath.'/php/services1.php', $dumper->dump(), '->dump() dumps an empty container as an empty PHP class');
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services1-1.php', $dumper->dump(array('class' => 'Container', 'base_class' => 'AbstractContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Dump')), '->dump() takes a class and a base_class options');
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services1-1.php', $dumper->dump(['class' => 'Container', 'base_class' => 'AbstractContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Dump']), '->dump() takes a class and a base_class options');
     }
 
     public function testDumpOptimizationString()
     {
         $definition = new Definition();
         $definition->setClass('stdClass');
-        $definition->addArgument(array(
+        $definition->addArgument([
             'only dot' => '.',
             'concatenation as value' => '.\'\'.',
             'concatenation from the start value' => '\'\'.',
@@ -74,7 +74,7 @@ class PhpDumperTest extends TestCase
             'optimize concatenation from the start' => '%empty_value%start',
             'optimize concatenation at the end' => 'end%empty_value%',
             'new line' => "string with \nnew line",
-        ));
+        ]);
         $definition->setPublic(true);
 
         $container = new ContainerBuilder();
@@ -93,7 +93,7 @@ class PhpDumperTest extends TestCase
         $definition = new Definition();
         $definition->setClass('stdClass');
         $definition->addArgument('%foo%');
-        $definition->addArgument(array('%foo%' => '%buz%/'));
+        $definition->addArgument(['%foo%' => '%buz%/']);
         $definition->setPublic(true);
 
         $container = new ContainerBuilder();
@@ -105,7 +105,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services12.php', $dumper->dump(array('file' => __FILE__)), '->dump() dumps __DIR__ relative strings');
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services12.php', $dumper->dump(['file' => __FILE__]), '->dump() dumps __DIR__ relative strings');
     }
 
     public function testDumpCustomContainerClassWithoutConstructor()
@@ -115,7 +115,7 @@ class PhpDumperTest extends TestCase
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_without_constructor.php', $dumper->dump(array('base_class' => 'NoConstructorContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_without_constructor.php', $dumper->dump(['base_class' => 'NoConstructorContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container']));
     }
 
     public function testDumpCustomContainerClassConstructorWithoutArguments()
@@ -125,7 +125,7 @@ class PhpDumperTest extends TestCase
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_constructor_without_arguments.php', $dumper->dump(array('base_class' => 'ConstructorWithoutArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_constructor_without_arguments.php', $dumper->dump(['base_class' => 'ConstructorWithoutArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container']));
     }
 
     public function testDumpCustomContainerClassWithOptionalArgumentLessConstructor()
@@ -135,7 +135,7 @@ class PhpDumperTest extends TestCase
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_with_optional_constructor_arguments.php', $dumper->dump(array('base_class' => 'ConstructorWithOptionalArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_with_optional_constructor_arguments.php', $dumper->dump(['base_class' => 'ConstructorWithOptionalArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container']));
     }
 
     public function testDumpCustomContainerClassWithMandatoryArgumentLessConstructor()
@@ -145,7 +145,7 @@ class PhpDumperTest extends TestCase
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_with_mandatory_constructor_arguments.php', $dumper->dump(array('base_class' => 'ConstructorWithMandatoryArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/custom_container_class_with_mandatory_constructor_arguments.php', $dumper->dump(['base_class' => 'ConstructorWithMandatoryArgumentsContainer', 'namespace' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\Container']));
     }
 
     /**
@@ -162,12 +162,12 @@ class PhpDumperTest extends TestCase
 
     public function provideInvalidParameters()
     {
-        return array(
-            array(array('foo' => new Definition('stdClass'))),
-            array(array('foo' => new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")'))),
-            array(array('foo' => new Reference('foo'))),
-            array(array('foo' => new Variable('foo'))),
-        );
+        return [
+            [['foo' => new Definition('stdClass')]],
+            [['foo' => new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')]],
+            [['foo' => new Reference('foo')]],
+            [['foo' => new Variable('foo')]],
+        ];
     }
 
     public function testAddParameters()
@@ -223,7 +223,7 @@ class PhpDumperTest extends TestCase
             ->addError('No-no-no-no');
         $container->compile();
         $dumper = new PhpDumper($container);
-        $dump = print_r($dumper->dump(array('as_files' => true, 'file' => __DIR__, 'hot_path_tag' => 'hot')), true);
+        $dump = print_r($dumper->dump(['as_files' => true, 'file' => __DIR__, 'hot_path_tag' => 'hot']), true);
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $dump = str_replace('\\\\Fixtures\\\\includes\\\\foo.php', '/Fixtures/includes/foo.php', $dump);
         }
@@ -247,7 +247,7 @@ class PhpDumperTest extends TestCase
         $container->register('bar$!', 'FooClass')->setPublic(true);
         $container->compile();
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => $class)));
+        eval('?>'.$dumper->dump(['class' => $class]));
 
         $this->assertTrue(method_exists($class, 'getBarService'));
         $this->assertTrue(method_exists($class, 'getBar2Service'));
@@ -261,7 +261,7 @@ class PhpDumperTest extends TestCase
         $container->register('foobar', 'FooClass')->setPublic(true);
         $container->compile();
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => $class)));
+        eval('?>'.$dumper->dump(['class' => $class]));
 
         $this->assertTrue(method_exists($class, 'getFooBarService'));
         $this->assertTrue(method_exists($class, 'getFoobar2Service'));
@@ -275,10 +275,10 @@ class PhpDumperTest extends TestCase
         $container->register('foo_bar', 'FooClass')->setPublic(true);
         $container->compile();
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array(
+        eval('?>'.$dumper->dump([
             'class' => $class,
             'base_class' => 'Symfony\Component\DependencyInjection\Tests\Fixtures\containers\CustomContainer',
-        )));
+        ]));
 
         $this->assertTrue(method_exists($class, 'getBar2Service'));
         $this->assertTrue(method_exists($class, 'getFoobar2Service'));
@@ -303,12 +303,12 @@ class PhpDumperTest extends TestCase
 
     public function provideInvalidFactories()
     {
-        return array(
-            array(array('', 'method')),
-            array(array('class', '')),
-            array(array('...', 'method')),
-            array(array('class', '...')),
-        );
+        return [
+            [['', 'method']],
+            [['class', '']],
+            [['...', 'method']],
+            [['class', '...']],
+        ];
     }
 
     public function testAliases()
@@ -317,7 +317,7 @@ class PhpDumperTest extends TestCase
         $container->setParameter('foo_bar', 'foo_bar');
         $container->compile();
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Aliases')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Aliases']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Aliases();
         $foo = $container->get('foo');
@@ -331,7 +331,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Frozen_No_Aliases')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Frozen_No_Aliases']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Frozen_No_Aliases();
         $this->assertFalse($container->has('foo'));
@@ -381,12 +381,12 @@ class PhpDumperTest extends TestCase
         $container->compile();
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services26.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_EnvParameters', 'file' => self::$fixturesPath.'/php/services26.php')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services26.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_EnvParameters', 'file' => self::$fixturesPath.'/php/services26.php']));
 
         require self::$fixturesPath.'/php/services26.php';
         $container = new \Symfony_DI_PhpDumper_Test_EnvParameters();
         $this->assertSame($rand, $container->getParameter('baz'));
-        $this->assertSame(array(123, 'abc'), $container->getParameter('json'));
+        $this->assertSame([123, 'abc'], $container->getParameter('json'));
         $this->assertSame('sqlite:///foo/bar/var/data.db', $container->getParameter('db_dsn'));
         putenv('Baz');
     }
@@ -398,10 +398,10 @@ class PhpDumperTest extends TestCase
         $container->setParameter('hello', '%env(base64:foo)%');
         $container->compile(true);
 
-        $expected = array(
+        $expected = [
             'env(foo)' => 'd29ybGQ=',
             'hello' => 'world',
-        );
+        ];
         $this->assertSame($expected, $container->getParameterBag()->all());
     }
 
@@ -415,7 +415,7 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
         $dumper->dump();
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_base64_env.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Base64Parameters')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_base64_env.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Base64Parameters']));
 
         require self::$fixturesPath.'/php/services_base64_env.php';
         $container = new \Symfony_DI_PhpDumper_Test_Base64Parameters();
@@ -432,11 +432,11 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
         $dumper->dump();
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_csv_env.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_CsvParameters')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_csv_env.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_CsvParameters']));
 
         require self::$fixturesPath.'/php/services_csv_env.php';
         $container = new \Symfony_DI_PhpDumper_Test_CsvParameters();
-        $this->assertSame(array('foo', 'bar'), $container->getParameter('hello'));
+        $this->assertSame(['foo', 'bar'], $container->getParameter('hello'));
     }
 
     public function testDumpedDefaultEnvParameters()
@@ -473,12 +473,12 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
         $dumper->dump();
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_json_env.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_JsonParameters')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_json_env.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_JsonParameters']));
 
         putenv('foobar="hello"');
         require self::$fixturesPath.'/php/services_json_env.php';
         $container = new \Symfony_DI_PhpDumper_Test_JsonParameters();
-        $this->assertSame(array('foo', 'bar'), $container->getParameter('hello'));
+        $this->assertSame(['foo', 'bar'], $container->getParameter('hello'));
         $this->assertNull($container->getParameter('hello-bar'));
     }
 
@@ -493,7 +493,7 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
         $dumper->dump();
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_rot13_env.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Rot13Parameters')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_rot13_env.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Rot13Parameters']));
 
         require self::$fixturesPath.'/php/services_rot13_env.php';
         $container = new \Symfony_DI_PhpDumper_Test_Rot13Parameters();
@@ -535,7 +535,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        $dump = $dumper->dump(array('class' => $class = __FUNCTION__));
+        $dump = $dumper->dump(['class' => $class = __FUNCTION__]);
 
         eval('?>'.$dump);
         $container = new $class();
@@ -551,7 +551,7 @@ class PhpDumperTest extends TestCase
     public function testInlinedDefinitionReferencingServiceContainer()
     {
         $container = new ContainerBuilder();
-        $container->register('foo', 'stdClass')->addMethodCall('add', array(new Reference('service_container')))->setPublic(false);
+        $container->register('foo', 'stdClass')->addMethodCall('add', [new Reference('service_container')])->setPublic(false);
         $container->register('bar', 'stdClass')->addArgument(new Reference('foo'))->setPublic(true);
         $container->compile();
 
@@ -586,7 +586,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Properties_Before_Method_Calls')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Properties_Before_Method_Calls']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Properties_Before_Method_Calls();
         $this->assertTrue($container->get('bar')->callPassed(), '->dump() initializes properties before method calls');
@@ -640,15 +640,15 @@ class PhpDumperTest extends TestCase
         $container
             ->register('lazy_context', 'LazyContext')
             ->setPublic(true)
-            ->setArguments(array(
-                new IteratorArgument(array('k1' => new Reference('lazy_referenced'), 'k2' => new Reference('service_container'))),
-                new IteratorArgument(array()),
-            ))
+            ->setArguments([
+                new IteratorArgument(['k1' => new Reference('lazy_referenced'), 'k2' => new Reference('service_container')]),
+                new IteratorArgument([]),
+            ])
         ;
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Lazy_Argument_Provide_Generator')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Lazy_Argument_Provide_Generator']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Lazy_Argument_Provide_Generator();
         $lazyContext = $container->get('lazy_context');
@@ -687,8 +687,8 @@ class PhpDumperTest extends TestCase
     public function testDumpContainerBuilderWithFrozenConstructorIncludingPrivateServices()
     {
         $container = new ContainerBuilder();
-        $container->register('foo_service', 'stdClass')->setArguments(array(new Reference('baz_service')))->setPublic(true);
-        $container->register('bar_service', 'stdClass')->setArguments(array(new Reference('baz_service')))->setPublic(true);
+        $container->register('foo_service', 'stdClass')->setArguments([new Reference('baz_service')])->setPublic(true);
+        $container->register('bar_service', 'stdClass')->setArguments([new Reference('baz_service')])->setPublic(true);
         $container->register('baz_service', 'stdClass')->setPublic(false);
         $container->compile();
 
@@ -702,20 +702,20 @@ class PhpDumperTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('foo_service', ServiceLocator::class)
             ->setPublic(true)
-            ->addArgument(array(
+            ->addArgument([
                 'bar' => new ServiceClosureArgument(new Reference('bar_service')),
                 'baz' => new ServiceClosureArgument(new TypedReference('baz_service', 'stdClass')),
                 'nil' => $nil = new ServiceClosureArgument(new Reference('nil')),
-            ))
+            ])
         ;
 
         // no method calls
         $container->register('translator.loader_1', 'stdClass')->setPublic(true);
         $container->register('translator.loader_1_locator', ServiceLocator::class)
             ->setPublic(false)
-            ->addArgument(array(
+            ->addArgument([
                 'translator.loader_1' => new ServiceClosureArgument(new Reference('translator.loader_1')),
-            ));
+            ]);
         $container->register('translator_1', StubbedTranslator::class)
             ->setPublic(true)
             ->addArgument(new Reference('translator.loader_1_locator'));
@@ -724,29 +724,29 @@ class PhpDumperTest extends TestCase
         $container->register('translator.loader_2', 'stdClass')->setPublic(true);
         $container->register('translator.loader_2_locator', ServiceLocator::class)
             ->setPublic(false)
-            ->addArgument(array(
+            ->addArgument([
                 'translator.loader_2' => new ServiceClosureArgument(new Reference('translator.loader_2')),
-            ));
+            ]);
         $container->register('translator_2', StubbedTranslator::class)
             ->setPublic(true)
             ->addArgument(new Reference('translator.loader_2_locator'))
-            ->addMethodCall('addResource', array('db', new Reference('translator.loader_2'), 'nl'));
+            ->addMethodCall('addResource', ['db', new Reference('translator.loader_2'), 'nl']);
 
         // two method calls
         $container->register('translator.loader_3', 'stdClass')->setPublic(true);
         $container->register('translator.loader_3_locator', ServiceLocator::class)
             ->setPublic(false)
-            ->addArgument(array(
+            ->addArgument([
                 'translator.loader_3' => new ServiceClosureArgument(new Reference('translator.loader_3')),
-            ));
+            ]);
         $container->register('translator_3', StubbedTranslator::class)
             ->setPublic(true)
             ->addArgument(new Reference('translator.loader_3_locator'))
-            ->addMethodCall('addResource', array('db', new Reference('translator.loader_3'), 'nl'))
-            ->addMethodCall('addResource', array('db', new Reference('translator.loader_3'), 'en'));
+            ->addMethodCall('addResource', ['db', new Reference('translator.loader_3'), 'nl'])
+            ->addMethodCall('addResource', ['db', new Reference('translator.loader_3'), 'en']);
 
-        $nil->setValues(array(null));
-        $container->register('bar_service', 'stdClass')->setArguments(array(new Reference('baz_service')))->setPublic(true);
+        $nil->setValues([null]);
+        $container->register('bar_service', 'stdClass')->setArguments([new Reference('baz_service')])->setPublic(true);
         $container->register('baz_service', 'stdClass')->setPublic(false);
         $container->compile();
 
@@ -762,10 +762,10 @@ class PhpDumperTest extends TestCase
             ->setPublic(true)
             ->setAutowired(true)
             ->addArgument(new Reference(ContainerInterface::class))
-            ->addTag('container.service_subscriber', array(
+            ->addTag('container.service_subscriber', [
                 'key' => 'bar',
                 'id' => TestServiceSubscriber::class,
-            ))
+            ])
         ;
         $container->register(TestServiceSubscriber::class, TestServiceSubscriber::class)->setPublic(true);
 
@@ -787,11 +787,11 @@ class PhpDumperTest extends TestCase
             ->setPublic(false);
         $container->register('bar', 'BarClass')
             ->setPublic(true)
-            ->addMethodCall('setBaz', array(new Reference('not_invalid', SymfonyContainerInterface::IGNORE_ON_INVALID_REFERENCE)));
+            ->addMethodCall('setBaz', [new Reference('not_invalid', SymfonyContainerInterface::IGNORE_ON_INVALID_REFERENCE)]);
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Private_With_Ignore_On_Invalid_Reference')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Private_With_Ignore_On_Invalid_Reference']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Private_With_Ignore_On_Invalid_Reference();
         $this->assertInstanceOf('BazClass', $container->get('bar')->getBaz());
@@ -800,16 +800,16 @@ class PhpDumperTest extends TestCase
     public function testArrayParameters()
     {
         $container = new ContainerBuilder();
-        $container->setParameter('array_1', array(123));
-        $container->setParameter('array_2', array(__DIR__));
+        $container->setParameter('array_1', [123]);
+        $container->setParameter('array_2', [__DIR__]);
         $container->register('bar', 'BarClass')
             ->setPublic(true)
-            ->addMethodCall('setBaz', array('%array_1%', '%array_2%', '%%array_1%%', array(123)));
+            ->addMethodCall('setBaz', ['%array_1%', '%array_2%', '%%array_1%%', [123]]);
         $container->compile();
 
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_array_params.php', str_replace('\\\\Dumper', '/Dumper', $dumper->dump(array('file' => self::$fixturesPath.'/php/services_array_params.php'))));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_array_params.php', str_replace('\\\\Dumper', '/Dumper', $dumper->dump(['file' => self::$fixturesPath.'/php/services_array_params.php'])));
     }
 
     public function testExpressionReferencingPrivateService()
@@ -835,7 +835,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
         $dumper = new PhpDumper($container);
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_uninitialized_ref.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Uninitialized_Reference')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_uninitialized_ref.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Uninitialized_Reference']));
 
         require self::$fixturesPath.'/php/services_uninitialized_ref.php';
 
@@ -849,7 +849,7 @@ class PhpDumperTest extends TestCase
         $this->assertNull($bar->closures[0]());
         $this->assertNull($bar->closures[1]());
         $this->assertNull($bar->closures[2]());
-        $this->assertSame(array(), iterator_to_array($bar->iter));
+        $this->assertSame([], iterator_to_array($bar->iter));
 
         $container = new \Symfony_DI_PhpDumper_Test_Uninitialized_Reference();
 
@@ -864,7 +864,7 @@ class PhpDumperTest extends TestCase
         $this->assertEquals(new \stdClass(), $bar->closures[0]());
         $this->assertNull($bar->closures[1]());
         $this->assertEquals(new \stdClass(), $bar->closures[2]());
-        $this->assertEquals(array('foo1' => new \stdClass(), 'foo3' => new \stdClass()), iterator_to_array($bar->iter));
+        $this->assertEquals(['foo1' => new \stdClass(), 'foo3' => new \stdClass()], iterator_to_array($bar->iter));
     }
 
     /**
@@ -877,7 +877,7 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
 
         $container = 'Symfony_DI_PhpDumper_Test_Almost_Circular_'.ucfirst($visibility);
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_almost_circular_'.$visibility.'.php', $dumper->dump(array('class' => $container)));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_almost_circular_'.$visibility.'.php', $dumper->dump(['class' => $container]));
 
         require self::$fixturesPath.'/php/services_almost_circular_'.$visibility.'.php';
 
@@ -889,7 +889,7 @@ class PhpDumperTest extends TestCase
         $foo2 = $container->get('foo2');
         $this->assertSame($foo2, $foo2->bar->foobar->foo);
 
-        $this->assertSame(array(), (array) $container->get('foobar4'));
+        $this->assertSame([], (array) $container->get('foobar4'));
 
         $foo5 = $container->get('foo5');
         $this->assertSame($foo5, $foo5->bar->foo);
@@ -901,15 +901,15 @@ class PhpDumperTest extends TestCase
         $this->assertEquals(new \stdClass(), $manager);
 
         $foo6 = $container->get('foo6');
-        $this->assertEquals((object) array('bar6' => (object) array()), $foo6);
+        $this->assertEquals((object) ['bar6' => (object) []], $foo6);
 
         $this->assertInstanceOf(\stdClass::class, $container->get('root'));
     }
 
     public function provideAlmostCircular()
     {
-        yield array('public');
-        yield array('private');
+        yield ['public'];
+        yield ['private'];
     }
 
     public function testDeepServiceGraph()
@@ -924,14 +924,14 @@ class PhpDumperTest extends TestCase
         $dumper = new PhpDumper($container);
         $dumper->dump();
 
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_deep_graph.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Deep_Graph')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_deep_graph.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Deep_Graph']));
 
         require self::$fixturesPath.'/php/services_deep_graph.php';
 
         $container = new \Symfony_DI_PhpDumper_Test_Deep_Graph();
 
         $this->assertInstanceOf(FooForDeepGraph::class, $container->get('foo'));
-        $this->assertEquals((object) array('p2' => (object) array('p3' => (object) array())), $container->get('foo')->bClone);
+        $this->assertEquals((object) ['p2' => (object) ['p3' => (object) []]], $container->get('foo')->bClone);
     }
 
     public function testInlineSelfRef()
@@ -953,7 +953,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_inline_self_ref.php', $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Inline_Self_Ref')));
+        $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_inline_self_ref.php', $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Inline_Self_Ref']));
     }
 
     public function testHotPathOptimizations()
@@ -963,7 +963,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
         $dumper = new PhpDumper($container);
 
-        $dump = $dumper->dump(array('hot_path_tag' => 'container.hot_path', 'inline_class_loader_parameter' => 'inline_requires', 'file' => self::$fixturesPath.'/php/services_inline_requires.php'));
+        $dump = $dumper->dump(['hot_path_tag' => 'container.hot_path', 'inline_class_loader_parameter' => 'inline_requires', 'file' => self::$fixturesPath.'/php/services_inline_requires.php']);
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $dump = str_replace("'\\\\includes\\\\HotPath\\\\", "'/includes/HotPath/", $dump);
         }
@@ -978,7 +978,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Literal_Class_With_Root_Namespace')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Literal_Class_With_Root_Namespace']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Literal_Class_With_Root_Namespace();
 
@@ -987,23 +987,23 @@ class PhpDumperTest extends TestCase
 
     public function testDumpHandlesObjectClassNames()
     {
-        $container = new ContainerBuilder(new ParameterBag(array(
+        $container = new ContainerBuilder(new ParameterBag([
             'class' => 'stdClass',
-        )));
+        ]));
 
         $container->setDefinition('foo', new Definition(new Parameter('class')));
-        $container->setDefinition('bar', new Definition('stdClass', array(
+        $container->setDefinition('bar', new Definition('stdClass', [
             new Reference('foo'),
-        )))->setPublic(true);
+        ]))->setPublic(true);
 
         $container->setParameter('inline_requires', true);
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array(
+        eval('?>'.$dumper->dump([
             'class' => 'Symfony_DI_PhpDumper_Test_Object_Class_Name',
             'inline_class_loader_parameter' => 'inline_requires',
-        )));
+        ]));
 
         $container = new \Symfony_DI_PhpDumper_Test_Object_Class_Name();
 
@@ -1020,17 +1020,17 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array(
+        eval('?>'.$dumper->dump([
             'class' => 'Symfony_DI_PhpDumper_Test_UninitializedSyntheticReference',
             'inline_class_loader_parameter' => 'inline_requires',
-        )));
+        ]));
 
         $container = new \Symfony_DI_PhpDumper_Test_UninitializedSyntheticReference();
 
-        $this->assertEquals((object) array('foo' => null), $container->get('bar'));
+        $this->assertEquals((object) ['foo' => null], $container->get('bar'));
 
-        $container->set('foo', (object) array(123));
-        $this->assertEquals((object) array('foo' => (object) array(123)), $container->get('bar'));
+        $container->set('foo', (object) [123]);
+        $this->assertEquals((object) ['foo' => (object) [123]], $container->get('bar'));
     }
 
     public function testAdawsonContainer()
@@ -1064,7 +1064,7 @@ class PhpDumperTest extends TestCase
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Private_Service_Triggers_Deprecation')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Private_Service_Triggers_Deprecation']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Private_Service_Triggers_Deprecation();
 
@@ -1073,11 +1073,11 @@ class PhpDumperTest extends TestCase
 
     public function testParameterWithMixedCase()
     {
-        $container = new ContainerBuilder(new ParameterBag(array('Foo' => 'bar', 'BAR' => 'foo')));
+        $container = new ContainerBuilder(new ParameterBag(['Foo' => 'bar', 'BAR' => 'foo']));
         $container->compile();
 
         $dumper = new PhpDumper($container);
-        eval('?>'.$dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Test_Parameter_With_Mixed_Case')));
+        eval('?>'.$dumper->dump(['class' => 'Symfony_DI_PhpDumper_Test_Parameter_With_Mixed_Case']));
 
         $container = new \Symfony_DI_PhpDumper_Test_Parameter_With_Mixed_Case();
 
@@ -1095,7 +1095,7 @@ class PhpDumperTest extends TestCase
         $container->setParameter('foo_bar', 'foo_bar');
         $container->compile();
         $dumper = new PhpDumper($container);
-        $dump = $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Errored_Definition'));
+        $dump = $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Errored_Definition']);
         $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_errored_definition.php', str_replace(str_replace('\\', '\\\\', self::$fixturesPath.\DIRECTORY_SEPARATOR.'includes'.\DIRECTORY_SEPARATOR), '%path%', $dump));
         eval('?>'.$dump);
 
@@ -1108,7 +1108,7 @@ class PhpDumperTest extends TestCase
         $container = include self::$fixturesPath.'/containers/container_service_locator_argument.php';
         $container->compile();
         $dumper = new PhpDumper($container);
-        $dump = $dumper->dump(array('class' => 'Symfony_DI_PhpDumper_Service_Locator_Argument'));
+        $dump = $dumper->dump(['class' => 'Symfony_DI_PhpDumper_Service_Locator_Argument']);
         $this->assertStringEqualsFile(self::$fixturesPath.'/php/services_service_locator_argument.php', str_replace(str_replace('\\', '\\\\', self::$fixturesPath.\DIRECTORY_SEPARATOR.'includes'.\DIRECTORY_SEPARATOR), '%path%', $dump));
         eval('?>'.$dump);
 
@@ -1145,7 +1145,7 @@ class Rot13EnvVarProcessor implements EnvVarProcessorInterface
 
     public static function getProvidedTypes()
     {
-        return array('rot13' => 'string');
+        return ['rot13' => 'string'];
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
index f33b3b8d70..ac274c6f26 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/XmlDumperTest.php
@@ -123,8 +123,8 @@ class XmlDumperTest extends TestCase
     {
         $fixturesPath = realpath(__DIR__.'/../Fixtures/');
 
-        return array(
-            array("<?xml version=\"1.0\" encoding=\"utf-8\"?>
+        return [
+            ["<?xml version=\"1.0\" encoding=\"utf-8\"?>
 <container xmlns=\"http://symfony.com/schema/dic/services\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd\">
   <services>
     <service id=\"service_container\" class=\"Symfony\Component\DependencyInjection\ContainerInterface\" public=\"true\" synthetic=\"true\"/>
@@ -133,8 +133,8 @@ class XmlDumperTest extends TestCase
     <service id=\"Symfony\Component\DependencyInjection\ContainerInterface\" alias=\"service_container\" public=\"false\"/>
   </services>
 </container>
-", include $fixturesPath.'/containers/container15.php'),
-            array("<?xml version=\"1.0\" encoding=\"utf-8\"?>
+", include $fixturesPath.'/containers/container15.php'],
+            ["<?xml version=\"1.0\" encoding=\"utf-8\"?>
 <container xmlns=\"http://symfony.com/schema/dic/services\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd\">
   <services>
     <service id=\"service_container\" class=\"Symfony\Component\DependencyInjection\ContainerInterface\" public=\"true\" synthetic=\"true\"/>
@@ -143,8 +143,8 @@ class XmlDumperTest extends TestCase
     <service id=\"Symfony\Component\DependencyInjection\ContainerInterface\" alias=\"service_container\" public=\"false\"/>
   </services>
 </container>
-", include $fixturesPath.'/containers/container16.php'),
-        );
+", include $fixturesPath.'/containers/container16.php'],
+        ];
     }
 
     /**
@@ -163,13 +163,13 @@ class XmlDumperTest extends TestCase
 
     public function provideCompiledContainerData()
     {
-        return array(
-            array('container8'),
-            array('container9'),
-            array('container11'),
-            array('container12'),
-            array('container14'),
-        );
+        return [
+            ['container8'],
+            ['container9'],
+            ['container11'],
+            ['container12'],
+            ['container14'],
+        ];
     }
 
     public function testDumpInlinedServices()
@@ -194,7 +194,7 @@ class XmlDumperTest extends TestCase
         $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
         $loader->load('services_dump_load.xml');
 
-        $this->assertEquals(array(new Reference('bar', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE)), $container->getDefinition('foo')->getArguments());
+        $this->assertEquals([new Reference('bar', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE)], $container->getDefinition('foo')->getArguments());
 
         $dumper = new XmlDumper($container);
         $this->assertStringEqualsFile(self::$fixturesPath.'/xml/services_dump_load.xml', $dumper->dump());
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
index ff2239fb64..49ee8e6f30 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Dumper/YamlDumperTest.php
@@ -75,7 +75,7 @@ class YamlDumperTest extends TestCase
         $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
         $loader->load('services_dump_load.yml');
 
-        $this->assertEquals(array(new Reference('bar', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE)), $container->getDefinition('foo')->getArguments());
+        $this->assertEquals([new Reference('bar', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE)], $container->getDefinition('foo')->getArguments());
 
         $dumper = new YamlDumper($container);
         $this->assertStringEqualsFile(self::$fixturesPath.'/yaml/services_dump_load.yml', $dumper->dump());
diff --git a/src/Symfony/Component/DependencyInjection/Tests/EnvVarProcessorTest.php b/src/Symfony/Component/DependencyInjection/Tests/EnvVarProcessorTest.php
index e9bb0fe47a..0ae6f4b0ef 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/EnvVarProcessorTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/EnvVarProcessorTest.php
@@ -31,16 +31,16 @@ class EnvVarProcessorTest extends TestCase
 
     public function validStrings()
     {
-        return array(
-            array('hello', 'hello'),
-            array('true', 'true'),
-            array('false', 'false'),
-            array('null', 'null'),
-            array('1', '1'),
-            array('0', '0'),
-            array('1.1', '1.1'),
-            array('1e1', '1e1'),
-        );
+        return [
+            ['hello', 'hello'],
+            ['true', 'true'],
+            ['false', 'false'],
+            ['null', 'null'],
+            ['1', '1'],
+            ['0', '0'],
+            ['1.1', '1.1'],
+            ['1e1', '1e1'],
+        ];
     }
 
     /**
@@ -61,15 +61,15 @@ class EnvVarProcessorTest extends TestCase
 
     public function validBools()
     {
-        return array(
-            array('true', true),
-            array('false', false),
-            array('null', false),
-            array('1', true),
-            array('0', false),
-            array('1.1', true),
-            array('1e1', true),
-        );
+        return [
+            ['true', true],
+            ['false', false],
+            ['null', false],
+            ['1', true],
+            ['0', false],
+            ['1.1', true],
+            ['1e1', true],
+        ];
     }
 
     /**
@@ -90,11 +90,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function validInts()
     {
-        return array(
-            array('1', 1),
-            array('1.1', 1),
-            array('1e1', 10),
-        );
+        return [
+            ['1', 1],
+            ['1.1', 1],
+            ['1e1', 10],
+        ];
     }
 
     /**
@@ -115,11 +115,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function invalidInts()
     {
-        return array(
-            array('foo'),
-            array('true'),
-            array('null'),
-        );
+        return [
+            ['foo'],
+            ['true'],
+            ['null'],
+        ];
     }
 
     /**
@@ -140,11 +140,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function validFloats()
     {
-        return array(
-            array('1', 1.0),
-            array('1.1', 1.1),
-            array('1e1', 10.0),
-        );
+        return [
+            ['1', 1.0],
+            ['1.1', 1.1],
+            ['1e1', 10.0],
+        ];
     }
 
     /**
@@ -165,11 +165,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function invalidFloats()
     {
-        return array(
-            array('foo'),
-            array('true'),
-            array('null'),
-        );
+        return [
+            ['foo'],
+            ['true'],
+            ['null'],
+        ];
     }
 
     /**
@@ -190,10 +190,10 @@ class EnvVarProcessorTest extends TestCase
 
     public function validConsts()
     {
-        return array(
-            array('Symfony\Component\DependencyInjection\Tests\EnvVarProcessorTest::TEST_CONST', self::TEST_CONST),
-            array('E_ERROR', E_ERROR),
-        );
+        return [
+            ['Symfony\Component\DependencyInjection\Tests\EnvVarProcessorTest::TEST_CONST', self::TEST_CONST],
+            ['E_ERROR', E_ERROR],
+        ];
     }
 
     /**
@@ -214,10 +214,10 @@ class EnvVarProcessorTest extends TestCase
 
     public function invalidConsts()
     {
-        return array(
-            array('Symfony\Component\DependencyInjection\Tests\EnvVarProcessorTest::UNDEFINED_CONST'),
-            array('UNDEFINED_CONST'),
-        );
+        return [
+            ['Symfony\Component\DependencyInjection\Tests\EnvVarProcessorTest::UNDEFINED_CONST'],
+            ['UNDEFINED_CONST'],
+        ];
     }
 
     public function testGetEnvBase64()
@@ -264,11 +264,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function validJson()
     {
-        return array(
-            array('[1]', array(1)),
-            array('{"key": "value"}', array('key' => 'value')),
-            array(null, null),
-        );
+        return [
+            ['[1]', [1]],
+            ['{"key": "value"}', ['key' => 'value']],
+            [null, null],
+        ];
     }
 
     /**
@@ -304,13 +304,13 @@ class EnvVarProcessorTest extends TestCase
 
     public function otherJsonValues()
     {
-        return array(
-            array(1),
-            array(1.1),
-            array(true),
-            array(false),
-            array('foo'),
-        );
+        return [
+            [1],
+            [1.1],
+            [true],
+            [false],
+            ['foo'],
+        ];
     }
 
     /**
@@ -359,12 +359,12 @@ class EnvVarProcessorTest extends TestCase
 
     public function noArrayValues()
     {
-        return array(
-            array(null),
-            array('string'),
-            array(1),
-            array(true),
-        );
+        return [
+            [null],
+            ['string'],
+            [1],
+            [true],
+        ];
     }
 
     /**
@@ -385,11 +385,11 @@ class EnvVarProcessorTest extends TestCase
 
     public function invalidArrayValues()
     {
-        return array(
-            array(array()),
-            array(array('index2' => 'value')),
-            array(array('index', 'index2')),
-        );
+        return [
+            [[]],
+            [['index2' => 'value']],
+            [['index', 'index2']],
+        ];
     }
 
     /**
@@ -408,17 +408,17 @@ class EnvVarProcessorTest extends TestCase
 
     public function arrayValues()
     {
-        return array(
-            array(array('index' => 'password')),
-            array(array('index' => 'true')),
-            array(array('index' => false)),
-            array(array('index' => '1')),
-            array(array('index' => 1)),
-            array(array('index' => '1.1')),
-            array(array('index' => 1.1)),
-            array(array('index' => array())),
-            array(array('index' => array('val1', 'val2'))),
-        );
+        return [
+            [['index' => 'password']],
+            [['index' => 'true']],
+            [['index' => false]],
+            [['index' => '1']],
+            [['index' => 1]],
+            [['index' => '1.1']],
+            [['index' => 1.1]],
+            [['index' => []]],
+            [['index' => ['val1', 'val2']]],
+        ];
     }
 
     public function testGetEnvKeyChained()
@@ -428,9 +428,9 @@ class EnvVarProcessorTest extends TestCase
         $this->assertSame('password', $processor->getEnv('key', 'index:file:foo', function ($name) {
             $this->assertSame('file:foo', $name);
 
-            return array(
+            return [
                 'index' => 'password',
-            );
+            ];
         }));
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
index 9f66bfd7c6..3c912f2a13 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Extension/ExtensionTest.php
@@ -23,15 +23,15 @@ class ExtensionTest extends TestCase
     public function testIsConfigEnabledReturnsTheResolvedValue($enabled)
     {
         $extension = new EnableableExtension();
-        $this->assertSame($enabled, $extension->isConfigEnabled(new ContainerBuilder(), array('enabled' => $enabled)));
+        $this->assertSame($enabled, $extension->isConfigEnabled(new ContainerBuilder(), ['enabled' => $enabled]));
     }
 
     public function getResolvedEnabledFixtures()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     /**
@@ -42,7 +42,7 @@ class ExtensionTest extends TestCase
     {
         $extension = new EnableableExtension();
 
-        $extension->isConfigEnabled(new ContainerBuilder(), array());
+        $extension->isConfigEnabled(new ContainerBuilder(), []);
     }
 }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Bar.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Bar.php
index d243866d36..83f2da12a7 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Bar.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Bar.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
 
 class Bar implements BarInterface
 {
-    public function __construct($quz = null, \NonExistent $nonExistent = null, BarInterface $decorated = null, array $foo = array())
+    public function __construct($quz = null, \NonExistent $nonExistent = null, BarInterface $decorated = null, array $foo = [])
     {
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/TestServiceSubscriber.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/TestServiceSubscriber.php
index 98be035c05..7fc3842af3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/TestServiceSubscriber.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/TestServiceSubscriber.php
@@ -12,11 +12,11 @@ class TestServiceSubscriber implements ServiceSubscriberInterface
 
     public static function getSubscribedServices()
     {
-        return array(
+        return [
             __CLASS__,
             '?'.CustomDefinition::class,
             'bar' => CustomDefinition::class,
             'baz' => '?'.CustomDefinition::class,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/anonymous.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/anonymous.php
index c8164d0741..27fc96fc9a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/anonymous.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/anonymous.php
@@ -13,9 +13,9 @@ return function (ContainerConfigurator $c) {
 
     $s->set(null, StdClassDecorator::class)
         ->decorate('decorated', 'decorator42')
-        ->args(array(ref('decorator42')));
+        ->args([ref('decorator42')]);
 
-    $s->set('listener_aggregator', FooClass::class)->public()->args(array(tagged('listener')));
+    $s->set('listener_aggregator', FooClass::class)->public()->args([tagged('listener')]);
 
     $s->set(null, stdClass::class)->tag('listener');
 };
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/basic.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/basic.php
index b98e894c37..a9e250b921 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/basic.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/basic.php
@@ -7,5 +7,5 @@ use App\BarService;
 return function (ContainerConfigurator $c) {
     $s = $c->services();
     $s->set(BarService::class)
-        ->args(array(inline('FooClass')));
+        ->args([inline('FooClass')]);
 };
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/child.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/child.php
index 6fd84485e7..8a5f2431d0 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/child.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/child.php
@@ -13,7 +13,7 @@ return function (ContainerConfigurator $c) {
         ->set('foo')
             ->parent(BarService::class)
             ->decorate('bar', 'b', 1)
-            ->args(array(ref('b')))
+            ->args([ref('b')])
             ->class('Class2')
             ->file('file.php')
             ->parent('bar')
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/defaults.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/defaults.php
index de3b99d745..2889d3fbb6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/defaults.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/defaults.php
@@ -12,10 +12,10 @@ return function (ContainerConfigurator $c) {
         ->private()
         ->autoconfigure()
         ->autowire()
-        ->tag('t', array('a' => 'b'))
+        ->tag('t', ['a' => 'b'])
         ->bind(Foo::class, ref('bar'))
         ->private();
 
-    $s->set(Foo::class)->args(array(ref('bar')))->public();
+    $s->set(Foo::class)->args([ref('bar')])->public();
     $s->set('bar', Foo::class)->call('setFoo')->autoconfigure(false);
 };
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/instanceof.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/instanceof.php
index 062e8c00ab..0d6aac7a00 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/instanceof.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/instanceof.php
@@ -9,8 +9,8 @@ return function (ContainerConfigurator $c) {
     $s = $c->services();
     $s->instanceof(Prototype\Foo::class)
         ->property('p', 0)
-        ->call('setFoo', array(ref('foo')))
-        ->tag('tag', array('k' => 'v'))
+        ->call('setFoo', [ref('foo')])
+        ->tag('tag', ['k' => 'v'])
         ->share(false)
         ->lazy()
         ->configurator('c')
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/object.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/object.php
index d8e3828e55..daf4682bf7 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/object.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/object.php
@@ -9,6 +9,6 @@ return new class() {
     {
         $s = $c->services();
         $s->set(BarService::class)
-            ->args(array(inline('FooClass')));
+            ->args([inline('FooClass')]);
     }
 };
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype.php
index 622c51af57..e2884aa202 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype.php
@@ -12,8 +12,8 @@ return function (ContainerConfigurator $c) {
         ->exclude('../Prototype/{OtherDir,BadClasses}')
         ->factory('f')
         ->deprecate('%service_id%')
-        ->args(array(0))
-        ->args(array(1))
+        ->args([0])
+        ->args([1])
         ->autoconfigure(false)
         ->tag('foo')
         ->parent('foo');
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype_array.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype_array.php
index 4d5625c245..819a3fa11c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype_array.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype_array.php
@@ -9,11 +9,11 @@ return function (ContainerConfigurator $c) {
         ->tag('baz');
     $di->load(Prototype::class.'\\', '../Prototype')
         ->autoconfigure()
-        ->exclude(array('../Prototype/OtherDir', '../Prototype/BadClasses'))
+        ->exclude(['../Prototype/OtherDir', '../Prototype/BadClasses'])
         ->factory('f')
         ->deprecate('%service_id%')
-        ->args(array(0))
-        ->args(array(1))
+        ->args([0])
+        ->args([1])
         ->autoconfigure(false)
         ->tag('foo')
         ->parent('foo');
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
index 8055f8ce7d..4a7172b46c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/services9.php
@@ -19,65 +19,65 @@ return function (ContainerConfigurator $c) {
     $s = $c->services()->defaults()
         ->public();
     $s->set('foo')
-        ->args(array('foo', ref('foo.baz'), array('%foo%' => 'foo is %foo%', 'foobar' => '%foo%'), true, ref('service_container')))
+        ->args(['foo', ref('foo.baz'), ['%foo%' => 'foo is %foo%', 'foobar' => '%foo%'], true, ref('service_container')])
         ->class(FooClass::class)
-        ->tag('foo', array('foo' => 'foo'))
-        ->tag('foo', array('bar' => 'bar', 'baz' => 'baz'))
-        ->factory(array(FooClass::class, 'getInstance'))
+        ->tag('foo', ['foo' => 'foo'])
+        ->tag('foo', ['bar' => 'bar', 'baz' => 'baz'])
+        ->factory([FooClass::class, 'getInstance'])
         ->property('foo', 'bar')
         ->property('moo', ref('foo.baz'))
-        ->property('qux', array('%foo%' => 'foo is %foo%', 'foobar' => '%foo%'))
-        ->call('setBar', array(ref('bar')))
+        ->property('qux', ['%foo%' => 'foo is %foo%', 'foobar' => '%foo%'])
+        ->call('setBar', [ref('bar')])
         ->call('initialize')
         ->configurator('sc_configure');
 
     $s->set('foo.baz', '%baz_class%')
-        ->factory(array('%baz_class%', 'getInstance'))
-        ->configurator(array('%baz_class%', 'configureStatic1'));
+        ->factory(['%baz_class%', 'getInstance'])
+        ->configurator(['%baz_class%', 'configureStatic1']);
 
     $s->set('bar', FooClass::class)
-        ->args(array('foo', ref('foo.baz'), new Parameter('foo_bar')))
-        ->configurator(array(ref('foo.baz'), 'configure'));
+        ->args(['foo', ref('foo.baz'), new Parameter('foo_bar')])
+        ->configurator([ref('foo.baz'), 'configure']);
 
     $s->set('foo_bar', '%foo_class%')
-        ->args(array(ref('deprecated_service')))
+        ->args([ref('deprecated_service')])
         ->share(false);
 
     $s->set('method_call1', 'Bar\FooClass')
         ->file(realpath(__DIR__.'/../includes/foo.php'))
-        ->call('setBar', array(ref('foo')))
-        ->call('setBar', array(ref('foo2')->nullOnInvalid()))
-        ->call('setBar', array(ref('foo3')->ignoreOnInvalid()))
-        ->call('setBar', array(ref('foobaz')->ignoreOnInvalid()))
-        ->call('setBar', array(expr('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')));
+        ->call('setBar', [ref('foo')])
+        ->call('setBar', [ref('foo2')->nullOnInvalid()])
+        ->call('setBar', [ref('foo3')->ignoreOnInvalid()])
+        ->call('setBar', [ref('foobaz')->ignoreOnInvalid()])
+        ->call('setBar', [expr('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')]);
 
     $s->set('foo_with_inline', 'Foo')
-        ->call('setBar', array(ref('inlined')));
+        ->call('setBar', [ref('inlined')]);
 
     $s->set('inlined', 'Bar')
         ->property('pub', 'pub')
-        ->call('setBaz', array(ref('baz')))
+        ->call('setBaz', [ref('baz')])
         ->private();
 
     $s->set('baz', 'Baz')
-        ->call('setFoo', array(ref('foo_with_inline')));
+        ->call('setFoo', [ref('foo_with_inline')]);
 
     $s->set('request', 'Request')
         ->synthetic();
 
     $s->set('configurator_service', 'ConfClass')
         ->private()
-        ->call('setFoo', array(ref('baz')));
+        ->call('setFoo', [ref('baz')]);
 
     $s->set('configured_service', 'stdClass')
-        ->configurator(array(ref('configurator_service'), 'configureStdClass'));
+        ->configurator([ref('configurator_service'), 'configureStdClass']);
 
     $s->set('configurator_service_simple', 'ConfClass')
-        ->args(array('bar'))
+        ->args(['bar'])
         ->private();
 
     $s->set('configured_service_simple', 'stdClass')
-        ->configurator(array(ref('configurator_service_simple'), 'configureStdClass'));
+        ->configurator([ref('configurator_service_simple'), 'configureStdClass']);
 
     $s->set('decorated', 'stdClass');
 
@@ -95,28 +95,28 @@ return function (ContainerConfigurator $c) {
         ->private();
 
     $s->set('factory_service', 'Bar')
-        ->factory(array(ref('foo.baz'), 'getInstance'));
+        ->factory([ref('foo.baz'), 'getInstance']);
 
     $s->set('new_factory_service', 'FooBarBaz')
         ->property('foo', 'bar')
-        ->factory(array(ref('new_factory'), 'getInstance'));
+        ->factory([ref('new_factory'), 'getInstance']);
 
     $s->set('service_from_static_method', 'Bar\FooClass')
-        ->factory(array('Bar\FooClass', 'getInstance'));
+        ->factory(['Bar\FooClass', 'getInstance']);
 
     $s->set('factory_simple', 'SimpleFactoryClass')
         ->deprecate()
-        ->args(array('foo'))
+        ->args(['foo'])
         ->private();
 
     $s->set('factory_service_simple', 'Bar')
-        ->factory(array(ref('factory_simple'), 'getInstance'));
+        ->factory([ref('factory_simple'), 'getInstance']);
 
     $s->set('lazy_context', 'LazyContext')
-        ->args(array(iterator(array('k1' => ref('foo.baz'), 'k2' => ref('service_container'))), iterator(array())));
+        ->args([iterator(['k1' => ref('foo.baz'), 'k2' => ref('service_container')]), iterator([])]);
 
     $s->set('lazy_context_ignore_invalid_ref', 'LazyContext')
-        ->args(array(iterator(array(ref('foo.baz'), ref('invalid')->ignoreOnInvalid())), iterator(array())));
+        ->args([iterator([ref('foo.baz'), ref('invalid')->ignoreOnInvalid()]), iterator([])]);
 
     $s->set('BAR', 'stdClass')->property('bar', ref('bar'));
     $s->set('bar2', 'stdClass');
@@ -128,10 +128,10 @@ return function (ContainerConfigurator $c) {
 
     $s->set('tagged_iterator', 'Bar')
         ->public()
-        ->args(array(tagged('foo')));
+        ->args([tagged('foo')]);
 
     $s->set('runtime_error', 'stdClass')
-        ->args(array(new Reference('errored_definition', ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE)))
+        ->args([new Reference('errored_definition', ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE)])
         ->public();
     $s->set('errored_definition', 'stdClass')->private();
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container11.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container11.php
index 150cd7921e..91e5c26330 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container11.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container11.php
@@ -6,7 +6,7 @@ use Symfony\Component\DependencyInjection\Definition;
 $container = new ContainerBuilder();
 $container->
     register('foo', 'FooClass')->
-    addArgument(new Definition('BarClass', array(new Definition('BazClass'))))
+    addArgument(new Definition('BarClass', [new Definition('BazClass')]))
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container12.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container12.php
index bc527eb79e..ef07703024 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container12.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container12.php
@@ -6,7 +6,7 @@ $container = new ContainerBuilder();
 $container->
     register('foo', 'FooClass\\Foo')->
     addArgument('foo<>&bar')->
-    addTag('foo"bar\\bar', array('foo' => 'foo"barřž€'))
+    addTag('foo"bar\\bar', ['foo' => 'foo"barřž€'])
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container19.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container19.php
index 300a5cc769..c3af5c9606 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container19.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container19.php
@@ -12,7 +12,7 @@ $container->setParameter('foo', '%env(FOO)%');
 
 $container
     ->register('service_from_anonymous_factory', '%foo%')
-    ->setFactory(array(new Definition('%foo%'), 'getInstance'))
+    ->setFactory([new Definition('%foo%'), 'getInstance'])
     ->setPublic(true)
 ;
 
@@ -20,7 +20,7 @@ $anonymousServiceWithFactory = new Definition('Bar\FooClass');
 $anonymousServiceWithFactory->setFactory('Bar\FooClass::getInstance');
 $container
     ->register('service_with_method_call_and_factory', 'Bar\FooClass')
-    ->addMethodCall('setBar', array($anonymousServiceWithFactory))
+    ->addMethodCall('setBar', [$anonymousServiceWithFactory])
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container21.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container21.php
index 298c9266a9..d82cf38538 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container21.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container21.php
@@ -6,15 +6,15 @@ use Symfony\Component\DependencyInjection\Definition;
 $container = new ContainerBuilder();
 
 $bar = new Definition('Bar');
-$bar->setConfigurator(array(new Definition('Baz'), 'configureBar'));
+$bar->setConfigurator([new Definition('Baz'), 'configureBar']);
 
 $fooFactory = new Definition('FooFactory');
-$fooFactory->setFactory(array(new Definition('Foobar'), 'createFooFactory'));
+$fooFactory->setFactory([new Definition('Foobar'), 'createFooFactory']);
 
 $container
     ->register('foo', 'Foo')
-    ->setFactory(array($fooFactory, 'createFoo'))
-    ->setConfigurator(array($bar, 'configureFoo'))
+    ->setFactory([$fooFactory, 'createFoo'])
+    ->setConfigurator([$bar, 'configureFoo'])
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container8.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container8.php
index 31e6baab32..26d436b4d5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container8.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container8.php
@@ -3,14 +3,14 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
 
-$container = new ContainerBuilder(new ParameterBag(array(
+$container = new ContainerBuilder(new ParameterBag([
     'foo' => '%baz%',
     'baz' => 'bar',
     'bar' => 'foo is %%foo bar',
     'escape' => '@escapeme',
-    'values' => array(true, false, null, 0, 1000.3, 'true', 'false', 'null'),
+    'values' => [true, false, null, 0, 1000.3, 'true', 'false', 'null'],
     'binary' => "\xf0\xf0\xf0\xf0",
     'binary-control-char' => "This is a Bell char \x07",
-)));
+]));
 
 return $container;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
index c403a3af40..520f235b22 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container9.php
@@ -14,26 +14,26 @@ use Symfony\Component\ExpressionLanguage\Expression;
 $container = new ContainerBuilder();
 $container
     ->register('foo', '\Bar\FooClass')
-    ->addTag('foo', array('foo' => 'foo'))
-    ->addTag('foo', array('bar' => 'bar', 'baz' => 'baz'))
-    ->setFactory(array('Bar\\FooClass', 'getInstance'))
-    ->setArguments(array('foo', new Reference('foo.baz'), array('%foo%' => 'foo is %foo%', 'foobar' => '%foo%'), true, new Reference('service_container')))
-    ->setProperties(array('foo' => 'bar', 'moo' => new Reference('foo.baz'), 'qux' => array('%foo%' => 'foo is %foo%', 'foobar' => '%foo%')))
-    ->addMethodCall('setBar', array(new Reference('bar')))
+    ->addTag('foo', ['foo' => 'foo'])
+    ->addTag('foo', ['bar' => 'bar', 'baz' => 'baz'])
+    ->setFactory(['Bar\\FooClass', 'getInstance'])
+    ->setArguments(['foo', new Reference('foo.baz'), ['%foo%' => 'foo is %foo%', 'foobar' => '%foo%'], true, new Reference('service_container')])
+    ->setProperties(['foo' => 'bar', 'moo' => new Reference('foo.baz'), 'qux' => ['%foo%' => 'foo is %foo%', 'foobar' => '%foo%']])
+    ->addMethodCall('setBar', [new Reference('bar')])
     ->addMethodCall('initialize')
     ->setConfigurator('sc_configure')
     ->setPublic(true)
 ;
 $container
     ->register('foo.baz', '%baz_class%')
-    ->setFactory(array('%baz_class%', 'getInstance'))
-    ->setConfigurator(array('%baz_class%', 'configureStatic1'))
+    ->setFactory(['%baz_class%', 'getInstance'])
+    ->setConfigurator(['%baz_class%', 'configureStatic1'])
     ->setPublic(true)
 ;
 $container
     ->register('bar', 'Bar\FooClass')
-    ->setArguments(array('foo', new Reference('foo.baz'), new Parameter('foo_bar')))
-    ->setConfigurator(array(new Reference('foo.baz'), 'configure'))
+    ->setArguments(['foo', new Reference('foo.baz'), new Parameter('foo_bar')])
+    ->setConfigurator([new Reference('foo.baz'), 'configure'])
     ->setPublic(true)
 ;
 $container
@@ -43,35 +43,35 @@ $container
     ->setPublic(true)
 ;
 $container->getParameterBag()->clear();
-$container->getParameterBag()->add(array(
+$container->getParameterBag()->add([
     'baz_class' => 'BazClass',
     'foo_class' => 'Bar\FooClass',
     'foo' => 'bar',
-));
+]);
 $container
     ->register('method_call1', 'Bar\FooClass')
     ->setFile(realpath(__DIR__.'/../includes/foo.php'))
-    ->addMethodCall('setBar', array(new Reference('foo')))
-    ->addMethodCall('setBar', array(new Reference('foo2', ContainerInterface::NULL_ON_INVALID_REFERENCE)))
-    ->addMethodCall('setBar', array(new Reference('foo3', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)))
-    ->addMethodCall('setBar', array(new Reference('foobaz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)))
-    ->addMethodCall('setBar', array(new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')))
+    ->addMethodCall('setBar', [new Reference('foo')])
+    ->addMethodCall('setBar', [new Reference('foo2', ContainerInterface::NULL_ON_INVALID_REFERENCE)])
+    ->addMethodCall('setBar', [new Reference('foo3', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)])
+    ->addMethodCall('setBar', [new Reference('foobaz', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)])
+    ->addMethodCall('setBar', [new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')])
     ->setPublic(true)
 ;
 $container
     ->register('foo_with_inline', 'Foo')
-    ->addMethodCall('setBar', array(new Reference('inlined')))
+    ->addMethodCall('setBar', [new Reference('inlined')])
     ->setPublic(true)
 ;
 $container
     ->register('inlined', 'Bar')
     ->setProperty('pub', 'pub')
-    ->addMethodCall('setBaz', array(new Reference('baz')))
+    ->addMethodCall('setBaz', [new Reference('baz')])
     ->setPublic(false)
 ;
 $container
     ->register('baz', 'Baz')
-    ->addMethodCall('setFoo', array(new Reference('foo_with_inline')))
+    ->addMethodCall('setFoo', [new Reference('foo_with_inline')])
     ->setPublic(true)
 ;
 $container
@@ -82,11 +82,11 @@ $container
 $container
     ->register('configurator_service', 'ConfClass')
     ->setPublic(false)
-    ->addMethodCall('setFoo', array(new Reference('baz')))
+    ->addMethodCall('setFoo', [new Reference('baz')])
 ;
 $container
     ->register('configured_service', 'stdClass')
-    ->setConfigurator(array(new Reference('configurator_service'), 'configureStdClass'))
+    ->setConfigurator([new Reference('configurator_service'), 'configureStdClass'])
     ->setPublic(true)
 ;
 $container
@@ -96,7 +96,7 @@ $container
 ;
 $container
     ->register('configured_service_simple', 'stdClass')
-    ->setConfigurator(array(new Reference('configurator_service_simple'), 'configureStdClass'))
+    ->setConfigurator([new Reference('configurator_service_simple'), 'configureStdClass'])
     ->setPublic(true)
 ;
 $container
@@ -125,18 +125,18 @@ $container
 ;
 $container
     ->register('factory_service', 'Bar')
-    ->setFactory(array(new Reference('foo.baz'), 'getInstance'))
+    ->setFactory([new Reference('foo.baz'), 'getInstance'])
     ->setPublic(true)
 ;
 $container
     ->register('new_factory_service', 'FooBarBaz')
     ->setProperty('foo', 'bar')
-    ->setFactory(array(new Reference('new_factory'), 'getInstance'))
+    ->setFactory([new Reference('new_factory'), 'getInstance'])
     ->setPublic(true)
 ;
 $container
     ->register('service_from_static_method', 'Bar\FooClass')
-    ->setFactory(array('Bar\FooClass', 'getInstance'))
+    ->setFactory(['Bar\FooClass', 'getInstance'])
     ->setPublic(true)
 ;
 $container
@@ -147,17 +147,17 @@ $container
 ;
 $container
     ->register('factory_service_simple', 'Bar')
-    ->setFactory(array(new Reference('factory_simple'), 'getInstance'))
+    ->setFactory([new Reference('factory_simple'), 'getInstance'])
     ->setPublic(true)
 ;
 $container
     ->register('lazy_context', 'LazyContext')
-    ->setArguments(array(new IteratorArgument(array('k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container'))), new IteratorArgument(array())))
+    ->setArguments([new IteratorArgument(['k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container')]), new IteratorArgument([])])
     ->setPublic(true)
 ;
 $container
     ->register('lazy_context_ignore_invalid_ref', 'LazyContext')
-    ->setArguments(array(new IteratorArgument(array(new Reference('foo.baz'), new Reference('invalid', ContainerInterface::IGNORE_ON_INVALID_REFERENCE))), new IteratorArgument(array())))
+    ->setArguments([new IteratorArgument([new Reference('foo.baz'), new Reference('invalid', ContainerInterface::IGNORE_ON_INVALID_REFERENCE)]), new IteratorArgument([])])
     ->setPublic(true)
 ;
 $container
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_almost_circular.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_almost_circular.php
index 4c9906f7ae..df136cfa5d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_almost_circular.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_almost_circular.php
@@ -15,7 +15,7 @@ $container->register('foo', FooCircular::class)->setPublic(true)
    ->addArgument(new Reference('bar'));
 
 $container->register('bar', BarCircular::class)->setPublic($public)
-    ->addMethodCall('addFoobar', array(new Reference('foobar')));
+    ->addMethodCall('addFoobar', [new Reference('foobar')]);
 
 $container->register('foobar', FoobarCircular::class)->setPublic($public)
     ->addArgument(new Reference('foo'));
@@ -26,7 +26,7 @@ $container->register('foo2', FooCircular::class)->setPublic(true)
    ->addArgument(new Reference('bar2'));
 
 $container->register('bar2', BarCircular::class)->setPublic(!$public)
-    ->addMethodCall('addFoobar', array(new Reference('foobar2')));
+    ->addMethodCall('addFoobar', [new Reference('foobar2')]);
 
 $container->register('foobar2', FoobarCircular::class)->setPublic($public)
     ->addArgument(new Reference('foo2'));
@@ -34,7 +34,7 @@ $container->register('foobar2', FoobarCircular::class)->setPublic($public)
 // simple inline setter with internal reference
 
 $container->register('bar3', BarCircular::class)->setPublic(true)
-    ->addMethodCall('addFoobar', array(new Reference('foobar3'), new Reference('foobar3')));
+    ->addMethodCall('addFoobar', [new Reference('foobar3'), new Reference('foobar3')]);
 
 $container->register('foobar3', FoobarCircular::class)->setPublic($public);
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_env_in_id.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_env_in_id.php
index 4699f41011..1e851cf016 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_env_in_id.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_env_in_id.php
@@ -11,7 +11,7 @@ $container->setParameter('env(BAR)', 'bar');
 
 $container->register('foo', 'stdClass')->setPublic(true)
    ->addArgument(new Reference('bar_%env(BAR)%'))
-   ->addArgument(array('baz_%env(BAR)%' => new Reference('baz_%env(BAR)%')));
+   ->addArgument(['baz_%env(BAR)%' => new Reference('baz_%env(BAR)%')]);
 
 $container->register('bar', 'stdClass')->setPublic(true)
    ->addArgument(new Reference('bar_%env(BAR)%'));
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_service_locator_argument.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_service_locator_argument.php
index 525dbde1f2..5c03ed3b85 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_service_locator_argument.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_service_locator_argument.php
@@ -33,13 +33,13 @@ $container
 
 $container
     ->register('bar', 'stdClass')
-    ->setProperty('locator', new ServiceLocatorArgument(array(
+    ->setProperty('locator', new ServiceLocatorArgument([
         'foo1' => new Reference('foo1'),
         'foo2' => new Reference('foo2'),
         'foo3' => new Reference('foo3'),
         'foo4' => new Reference('foo4', $container::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE),
         'foo5' => new Reference('foo5', $container::IGNORE_ON_UNINITIALIZED_REFERENCE),
-    )))
+    ]))
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_uninitialized_ref.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_uninitialized_ref.php
index 7aeefb4d52..36c05c3fa3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_uninitialized_ref.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_uninitialized_ref.php
@@ -33,16 +33,16 @@ $container
     ->setProperty('foo1', new Reference('foo1', $container::IGNORE_ON_UNINITIALIZED_REFERENCE))
     ->setProperty('foo2', new Reference('foo2', $container::IGNORE_ON_UNINITIALIZED_REFERENCE))
     ->setProperty('foo3', new Reference('foo3', $container::IGNORE_ON_UNINITIALIZED_REFERENCE))
-    ->setProperty('closures', array(
+    ->setProperty('closures', [
         new ServiceClosureArgument(new Reference('foo1', $container::IGNORE_ON_UNINITIALIZED_REFERENCE)),
         new ServiceClosureArgument(new Reference('foo2', $container::IGNORE_ON_UNINITIALIZED_REFERENCE)),
         new ServiceClosureArgument(new Reference('foo3', $container::IGNORE_ON_UNINITIALIZED_REFERENCE)),
-    ))
-    ->setProperty('iter', new IteratorArgument(array(
+    ])
+    ->setProperty('iter', new IteratorArgument([
         'foo1' => new Reference('foo1', $container::IGNORE_ON_UNINITIALIZED_REFERENCE),
         'foo2' => new Reference('foo2', $container::IGNORE_ON_UNINITIALIZED_REFERENCE),
         'foo3' => new Reference('foo3', $container::IGNORE_ON_UNINITIALIZED_REFERENCE),
-    )))
+    ]))
     ->setPublic(true)
 ;
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/ProjectExtension.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/ProjectExtension.php
index e01c21326d..81ea2b18bb 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/ProjectExtension.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/ProjectExtension.php
@@ -13,7 +13,7 @@ class ProjectExtension implements ExtensionInterface
         if ($configs) {
             $config = array_merge(...$configs);
         } else {
-            $config = array();
+            $config = [];
         }
 
         $configuration->register('project.service.bar', 'FooClass')->setPublic(true);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/autowiring_classes.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/autowiring_classes.php
index 93eab8c50f..a2f8721683 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/autowiring_classes.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/autowiring_classes.php
@@ -361,7 +361,7 @@ interface DecoratorInterface
 
 class Decorated implements DecoratorInterface
 {
-    public function __construct($quz = null, \NonExistent $nonExistent = null, DecoratorInterface $decorated = null, array $foo = array())
+    public function __construct($quz = null, \NonExistent $nonExistent = null, DecoratorInterface $decorated = null, array $foo = [])
     {
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/foo.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/foo.php
index bcb4e20a94..20bc928b97 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/foo.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/foo.php
@@ -11,14 +11,14 @@ class FooClass
     public $initialized = false;
     public $configured = false;
     public $called = false;
-    public $arguments = array();
+    public $arguments = [];
 
-    public function __construct($arguments = array())
+    public function __construct($arguments = [])
     {
         $this->arguments = $arguments;
     }
 
-    public static function getInstance($arguments = array())
+    public static function getInstance($arguments = [])
     {
         $obj = new self($arguments);
         $obj->called = true;
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_constructor_without_arguments.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_constructor_without_arguments.php
index 73f1bfd475..fdc9510ffe 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_constructor_without_arguments.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_constructor_without_arguments.php
@@ -19,16 +19,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tests\Fixtures\Container\ConstructorWithoutArgumentsContainer
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         parent::__construct();
         $this->parameterBag = null;
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -43,9 +43,9 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_mandatory_constructor_arguments.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_mandatory_constructor_arguments.php
index 67d00b7618..e9e0ce940c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_mandatory_constructor_arguments.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_mandatory_constructor_arguments.php
@@ -19,13 +19,13 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tests\Fixtures\Container\ConstructorWithMandatoryArgumentsContainer
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,9 +40,9 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_optional_constructor_arguments.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_optional_constructor_arguments.php
index 770b478e48..84714daaf1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_optional_constructor_arguments.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_with_optional_constructor_arguments.php
@@ -19,16 +19,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tests\Fixtures\Container\ConstructorWithOptionalArgumentsContainer
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         parent::__construct();
         $this->parameterBag = null;
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -43,9 +43,9 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_without_constructor.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_without_constructor.php
index 23a361ff11..5fecfcff4f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_without_constructor.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/custom_container_class_without_constructor.php
@@ -19,13 +19,13 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tests\Fixtures\Container\NoConstructorContainer
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,9 +40,9 @@ class ProjectServiceContainer extends \Symfony\Component\DependencyInjection\Tes
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php
index a03fa75674..09e5585c11 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1-1.php
@@ -19,13 +19,13 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Container extends \Symfony\Component\DependencyInjection\Dump\AbstractContainer
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,9 +40,9 @@ class Container extends \Symfony\Component\DependencyInjection\Dump\AbstractCont
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php
index c6ac23dd82..25b363060b 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services1.php
@@ -17,13 +17,13 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -38,9 +38,9 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
index c1edd2cf74..101e8b57e8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services10.php
@@ -17,18 +17,18 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'test' => 'getTestService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -43,10 +43,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -56,7 +56,7 @@ class ProjectServiceContainer extends Container
      */
     protected function getTestService()
     {
-        return $this->services['test'] = new \stdClass(array('only dot' => '.', 'concatenation as value' => '.\'\'.', 'concatenation from the start value' => '\'\'.', '.' => 'dot as a key', '.\'\'.' => 'concatenation as a key', '\'\'.' => 'concatenation from the start key', 'optimize concatenation' => 'string1-string2', 'optimize concatenation with empty string' => 'string1string2', 'optimize concatenation from the start' => 'start', 'optimize concatenation at the end' => 'end', 'new line' => 'string with '."\n".'new line'));
+        return $this->services['test'] = new \stdClass(['only dot' => '.', 'concatenation as value' => '.\'\'.', 'concatenation from the start value' => '\'\'.', '.' => 'dot as a key', '.\'\'.' => 'concatenation as a key', '\'\'.' => 'concatenation from the start key', 'optimize concatenation' => 'string1-string2', 'optimize concatenation with empty string' => 'string1string2', 'optimize concatenation from the start' => 'start', 'optimize concatenation at the end' => 'end', 'new line' => 'string with '."\n".'new line']);
     }
 
     public function getParameter($name)
@@ -98,8 +98,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -122,9 +122,9 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'empty_value' => '',
             'some_string' => '-',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php
index 5ce530a36a..f37923c4b1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services12.php
@@ -17,7 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
@@ -27,12 +27,12 @@ class ProjectServiceContainer extends Container
         }
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'test' => 'getTestService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -47,10 +47,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -60,7 +60,7 @@ class ProjectServiceContainer extends Container
      */
     protected function getTestService()
     {
-        return $this->services['test'] = new \stdClass(('wiz'.$this->targetDirs[1]), array(('wiz'.$this->targetDirs[1]) => ($this->targetDirs[2].'/')));
+        return $this->services['test'] = new \stdClass(('wiz'.$this->targetDirs[1]), [('wiz'.$this->targetDirs[1]) => ($this->targetDirs[2].'/')]);
     }
 
     public function getParameter($name)
@@ -102,11 +102,11 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'foo' => false,
         'buz' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -136,9 +136,9 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'bar' => __DIR__,
             'baz' => (__DIR__.'/PhpDumperTest.php'),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php
index 8eaac031bf..ff3aef254d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services13.php
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -41,11 +41,11 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'foo' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services19.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services19.php
index 56cdb8b31f..7f8c93c5c6 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services19.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services19.php
@@ -17,19 +17,19 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'service_from_anonymous_factory' => 'getServiceFromAnonymousFactoryService',
             'service_with_method_call_and_factory' => 'getServiceWithMethodCallAndFactoryService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -44,10 +44,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -113,10 +113,10 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'foo' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -145,8 +145,8 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(FOO)' => 'Bar\\FaooClass',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services24.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services24.php
index d8072f822a..96dee5eb92 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services24.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services24.php
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'foo' => 'getFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -41,10 +41,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services26.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services26.php
index c0ef208db5..5d7c85b70d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services26.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services26.php
@@ -17,7 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_EnvParameters extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
@@ -27,13 +27,13 @@ class Symfony_DI_PhpDumper_Test_EnvParameters extends Container
         }
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'test' => 'getTestService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -48,10 +48,10 @@ class Symfony_DI_PhpDumper_Test_EnvParameters extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -113,14 +113,14 @@ class Symfony_DI_PhpDumper_Test_EnvParameters extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'bar' => false,
         'baz' => false,
         'json' => false,
         'db_dsn' => false,
         'env(json_file)' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -153,10 +153,10 @@ class Symfony_DI_PhpDumper_Test_EnvParameters extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'project_dir' => '/foo/bar',
             'env(FOO)' => 'foo',
             'env(DB)' => 'sqlite://%project_dir%/var/data.db',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services33.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services33.php
index 72cb664cbb..e1c7a5b953 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services33.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services33.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'Bar\\Foo' => 'getFooService',
             'Foo\\Foo' => 'getFoo2Service',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -42,10 +42,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php
index 82b58a54e8..d8894ced97 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services8.php
@@ -17,15 +17,15 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,10 +40,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     public function getParameter($name)
@@ -85,8 +85,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -109,12 +109,12 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'foo' => 'bar',
             'baz' => 'bar',
             'bar' => 'foo is %foo bar',
             'escape' => '@escapeme',
-            'values' => array(
+            'values' => [
                 0 => true,
                 1 => false,
                 2 => NULL,
@@ -123,9 +123,9 @@ class ProjectServiceContainer extends Container
                 5 => 'true',
                 6 => 'false',
                 7 => 'null',
-            ),
+            ],
             'binary' => '����',
             'binary-control-char' => 'This is a Bell char ',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
index 6d305e570f..992f6b1859 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_as_files.txt
@@ -2,7 +2,7 @@ Array
 (
     [Container%s/removed-ids.php] => <?php
 
-return array(
+return [
     'Psr\\Container\\ContainerInterface' => true,
     'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
     'configurator_service' => true,
@@ -15,7 +15,7 @@ return array(
     'inlined' => true,
     'new_factory' => true,
     'tagged_iterator_foo' => true,
-);
+];
 
     [Container%s/getBAR2Service.php] => <?php
 
@@ -170,11 +170,11 @@ use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 
 $a = ($this->services['foo.baz'] ?? $this->load('getFoo_BazService.php'));
 
-$this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, array('bar' => 'foo is bar', 'foobar' => 'bar'), true, $this);
+$this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, ['bar' => 'foo is bar', 'foobar' => 'bar'], true, $this);
 
 $instance->foo = 'bar';
 $instance->moo = $a;
-$instance->qux = array('bar' => 'foo is bar', 'foobar' => 'bar');
+$instance->qux = ['bar' => 'foo is bar', 'foobar' => 'bar'];
 $instance->setBar(($this->services['bar'] ?? $this->getBarService()));
 $instance->initialize();
 sc_configure($instance);
@@ -374,9 +374,9 @@ class ProjectServiceContainer extends Container
     private $buildParameters;
     private $containerDir;
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
-    public function __construct(array $buildParameters = array(), $containerDir = __DIR__)
+    public function __construct(array $buildParameters = [], $containerDir = __DIR__)
     {
         $dir = $this->targetDirs[0] = \dirname($containerDir);
         for ($i = 1; $i <= 5; ++$i) {
@@ -386,14 +386,14 @@ class ProjectServiceContainer extends Container
         $this->containerDir = $containerDir;
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->syntheticIds = array(
+        $this->services = $this->privates = [];
+        $this->syntheticIds = [
             'request' => true,
-        );
-        $this->methodMap = array(
+        ];
+        $this->methodMap = [
             'bar' => 'getBarService',
-        );
-        $this->fileMap = array(
+        ];
+        $this->fileMap = [
             'BAR' => 'getBAR2Service.php',
             'BAR2' => 'getBAR22Service.php',
             'bar2' => 'getBar23Service.php',
@@ -418,12 +418,12 @@ class ProjectServiceContainer extends Container
             'service_from_static_method' => 'getServiceFromStaticMethodService.php',
             'tagged_iterator' => 'getTaggedIteratorService.php',
             'throwing_one' => 'getThrowingOneService.php',
-        );
-        $this->aliases = array(
+        ];
+        $this->aliases = [
             'alias_for_alias' => 'foo',
             'alias_for_foo' => 'foo',
             'decorated' => 'decorator_service_with_name',
-        );
+        ];
     }
 
     public function compile()
@@ -510,8 +510,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -534,11 +534,11 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'baz_class' => 'BazClass',
             'foo_class' => 'Bar\\FooClass',
             'foo' => 'bar',
-        );
+        ];
     }
 
     protected function throw($message)
@@ -563,10 +563,10 @@ if (!\class_exists(ProjectServiceContainer::class, false)) {
     \class_alias(\Container%s\ProjectServiceContainer::class, ProjectServiceContainer::class, false);
 }
 
-return new \Container%s\ProjectServiceContainer(array(
+return new \Container%s\ProjectServiceContainer([
     'container.build_hash' => '%s',
     'container.build_id' => '%s',
     'container.build_time' => %d,
-), __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
+], __DIR__.\DIRECTORY_SEPARATOR.'Container%s');
 
 )
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
index b74c56bbbc..939c88e768 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services9_compiled.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->syntheticIds = array(
+        $this->services = $this->privates = [];
+        $this->syntheticIds = [
             'request' => true,
-        );
-        $this->methodMap = array(
+        ];
+        $this->methodMap = [
             'BAR' => 'getBARService',
             'BAR2' => 'getBAR2Service',
             'bar' => 'getBar3Service',
@@ -51,12 +51,12 @@ class ProjectServiceContainer extends Container
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
-        );
-        $this->aliases = array(
+        ];
+        $this->aliases = [
             'alias_for_alias' => 'foo',
             'alias_for_foo' => 'foo',
             'decorated' => 'decorator_service_with_name',
-        );
+        ];
     }
 
     public function compile()
@@ -71,7 +71,7 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'configurator_service' => true,
@@ -83,7 +83,7 @@ class ProjectServiceContainer extends Container
             'inlined' => true,
             'new_factory' => true,
             'tagged_iterator_foo' => true,
-        );
+        ];
     }
 
     /**
@@ -244,11 +244,11 @@ class ProjectServiceContainer extends Container
     {
         $a = ($this->services['foo.baz'] ?? $this->getFoo_BazService());
 
-        $this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, array('bar' => 'foo is bar', 'foobar' => 'bar'), true, $this);
+        $this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, ['bar' => 'foo is bar', 'foobar' => 'bar'], true, $this);
 
         $instance->foo = 'bar';
         $instance->moo = $a;
-        $instance->qux = array('bar' => 'foo is bar', 'foobar' => 'bar');
+        $instance->qux = ['bar' => 'foo is bar', 'foobar' => 'bar'];
         $instance->setBar(($this->services['bar'] ?? $this->getBar3Service()));
         $instance->initialize();
         sc_configure($instance);
@@ -448,8 +448,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -472,11 +472,11 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'baz_class' => 'BazClass',
             'foo_class' => 'Bar\\FooClass',
             'foo' => 'bar',
-        );
+        ];
     }
 
     protected function throw($message)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_adawson.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_adawson.php
index 136972846b..6239128bc4 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_adawson.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_adawson.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'App\\Bus' => 'getBusService',
             'App\\Db' => 'getDbService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -42,7 +42,7 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'App\\Handler1' => true,
             'App\\Handler2' => true,
             'App\\Processor' => true,
@@ -50,7 +50,7 @@ class ProjectServiceContainer extends Container
             'App\\Schema' => true,
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -66,7 +66,7 @@ class ProjectServiceContainer extends Container
 
         $b = ($this->privates['App\Schema'] ?? $this->getSchemaService());
         $c = new \App\Registry();
-        $c->processor = array(0 => $a, 1 => $instance);
+        $c->processor = [0 => $a, 1 => $instance];
 
         $d = new \App\Processor($c, $a);
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
index 198427402a..e76fa907e2 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_private.php
@@ -17,12 +17,12 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Almost_Circular_Private extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar2' => 'getBar2Service',
             'bar3' => 'getBar3Service',
             'baz6' => 'getBaz6Service',
@@ -38,9 +38,9 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Private extends Container
             'manager2' => 'getManager2Service',
             'root' => 'getRootService',
             'subscriber' => 'getSubscriberService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -55,7 +55,7 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Private extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'bar' => true,
@@ -77,7 +77,7 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Private extends Container
             'logger2' => true,
             'multiuse1' => true,
             'subscriber2' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
index 1f03714232..7af6de85c1 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_almost_circular_public.php
@@ -17,12 +17,12 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Almost_Circular_Public extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'bar3' => 'getBar3Service',
             'bar5' => 'getBar5Service',
@@ -45,9 +45,9 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Public extends Container
             'manager2' => 'getManager2Service',
             'root' => 'getRootService',
             'subscriber' => 'getSubscriberService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -62,7 +62,7 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Public extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'bar2' => true,
@@ -77,7 +77,7 @@ class Symfony_DI_PhpDumper_Test_Almost_Circular_Public extends Container
             'logger2' => true,
             'multiuse1' => true,
             'subscriber2' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_array_params.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_array_params.php
index 110b646a39..4d7b13f620 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_array_params.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_array_params.php
@@ -17,7 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
@@ -27,12 +27,12 @@ class ProjectServiceContainer extends Container
         }
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -47,10 +47,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -106,10 +106,10 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'array_2' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -123,9 +123,9 @@ class ProjectServiceContainer extends Container
     private function getDynamicParameter($name)
     {
         switch ($name) {
-            case 'array_2': $value = array(
+            case 'array_2': $value = [
                 0 => ($this->targetDirs[2].'/Dumper'),
-            ); break;
+            ]; break;
             default: throw new InvalidArgumentException(sprintf('The dynamic parameter "%s" must be defined.', $name));
         }
         $this->loadedDynamicParameters[$name] = true;
@@ -140,10 +140,10 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
-            'array_1' => array(
+        return [
+            'array_1' => [
                 0 => 123,
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_base64_env.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_base64_env.php
index d87d763e3c..b25d3853d2 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_base64_env.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_base64_env.php
@@ -17,15 +17,15 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Base64Parameters extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,10 +40,10 @@ class Symfony_DI_PhpDumper_Test_Base64Parameters extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     public function getParameter($name)
@@ -85,10 +85,10 @@ class Symfony_DI_PhpDumper_Test_Base64Parameters extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'hello' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -117,8 +117,8 @@ class Symfony_DI_PhpDumper_Test_Base64Parameters extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(foo)' => 'd29ybGQ=',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_csv_env.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_csv_env.php
index 092c09212b..c5266d2c4d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_csv_env.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_csv_env.php
@@ -17,15 +17,15 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_CsvParameters extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,10 +40,10 @@ class Symfony_DI_PhpDumper_Test_CsvParameters extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     public function getParameter($name)
@@ -85,10 +85,10 @@ class Symfony_DI_PhpDumper_Test_CsvParameters extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'hello' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -117,8 +117,8 @@ class Symfony_DI_PhpDumper_Test_CsvParameters extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(foo)' => 'foo,bar',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_dedup_lazy_proxy.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_dedup_lazy_proxy.php
index 18f3afb998..8e7a204d4c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_dedup_lazy_proxy.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_dedup_lazy_proxy.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'foo' => 'getFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -42,10 +42,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     protected function createProxy($class, \Closure $factory)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deep_graph.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deep_graph.php
index f729fd540e..3f8f49bd3d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deep_graph.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_deep_graph.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Deep_Graph extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'foo' => 'getFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -42,10 +42,10 @@ class Symfony_DI_PhpDumper_Test_Deep_Graph extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
index 969137450a..84fb1599bf 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_env_in_id.php
@@ -17,19 +17,19 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'foo' => 'getFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -44,12 +44,12 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'bar_%env(BAR)%' => true,
             'baz_%env(BAR)%' => true,
-        );
+        ];
     }
 
     /**
@@ -69,7 +69,7 @@ class ProjectServiceContainer extends Container
      */
     protected function getFooService()
     {
-        return $this->services['foo'] = new \stdClass(($this->privates['bar_%env(BAR)%'] ?? ($this->privates['bar_%env(BAR)%'] = new \stdClass())), array('baz_'.$this->getEnv('string:BAR') => new \stdClass()));
+        return $this->services['foo'] = new \stdClass(($this->privates['bar_%env(BAR)%'] ?? ($this->privates['bar_%env(BAR)%'] = new \stdClass())), ['baz_'.$this->getEnv('string:BAR') => new \stdClass()]);
     }
 
     public function getParameter($name)
@@ -111,8 +111,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -135,8 +135,8 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(BAR)' => 'bar',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
index 22d6ebbf13..2c0f37d3ae 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_errored_definition.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Errored_Definition extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->syntheticIds = array(
+        $this->services = $this->privates = [];
+        $this->syntheticIds = [
             'request' => true,
-        );
-        $this->methodMap = array(
+        ];
+        $this->methodMap = [
             'BAR' => 'getBARService',
             'BAR2' => 'getBAR2Service',
             'bar' => 'getBar3Service',
@@ -51,12 +51,12 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
             'runtime_error' => 'getRuntimeErrorService',
             'service_from_static_method' => 'getServiceFromStaticMethodService',
             'tagged_iterator' => 'getTaggedIteratorService',
-        );
-        $this->aliases = array(
+        ];
+        $this->aliases = [
             'alias_for_alias' => 'foo',
             'alias_for_foo' => 'foo',
             'decorated' => 'decorator_service_with_name',
-        );
+        ];
     }
 
     public function compile()
@@ -71,7 +71,7 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'configurator_service' => true,
@@ -83,7 +83,7 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
             'inlined' => true,
             'new_factory' => true,
             'tagged_iterator_foo' => true,
-        );
+        ];
     }
 
     /**
@@ -244,11 +244,11 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
     {
         $a = ($this->services['foo.baz'] ?? $this->getFoo_BazService());
 
-        $this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, array('bar' => 'foo is bar', 'foobar' => 'bar'), true, $this);
+        $this->services['foo'] = $instance = \Bar\FooClass::getInstance('foo', $a, ['bar' => 'foo is bar', 'foobar' => 'bar'], true, $this);
 
         $instance->foo = 'bar';
         $instance->moo = $a;
-        $instance->qux = array('bar' => 'foo is bar', 'foobar' => 'bar');
+        $instance->qux = ['bar' => 'foo is bar', 'foobar' => 'bar'];
         $instance->setBar(($this->services['bar'] ?? $this->getBar3Service()));
         $instance->initialize();
         sc_configure($instance);
@@ -448,8 +448,8 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -472,12 +472,12 @@ class Symfony_DI_PhpDumper_Errored_Definition extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'baz_class' => 'BazClass',
             'foo_class' => 'Bar\\FooClass',
             'foo' => 'bar',
             'foo_bar' => 'foo_bar',
-        );
+        ];
     }
 
     protected function throw($message)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
index f3a66c5963..ee6e3d8205 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_requires.php
@@ -17,7 +17,7 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
@@ -27,14 +27,14 @@ class ProjectServiceContainer extends Container
         }
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\ParentNotExists' => 'getParentNotExistsService',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C1' => 'getC1Service',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C2' => 'getC2Service',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
 
         $this->privates['service_container'] = function () {
             include_once $this->targetDirs[1].'/includes/HotPath/I1.php';
@@ -56,11 +56,11 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C3' => true,
-        );
+        ];
     }
 
     /**
@@ -135,8 +135,8 @@ class ProjectServiceContainer extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array();
-    private $dynamicParameters = array();
+    private $loadedDynamicParameters = [];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -159,8 +159,8 @@ class ProjectServiceContainer extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'inline_requires' => true,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_self_ref.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_self_ref.php
index 6eec371f01..8b9703cd86 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_self_ref.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_inline_self_ref.php
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Inline_Self_Ref extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'App\\Foo' => 'getFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -41,10 +41,10 @@ class Symfony_DI_PhpDumper_Test_Inline_Self_Ref extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_json_env.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_json_env.php
index 59953174de..5b90e5b416 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_json_env.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_json_env.php
@@ -17,15 +17,15 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_JsonParameters extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
+        $this->services = $this->privates = [];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -40,10 +40,10 @@ class Symfony_DI_PhpDumper_Test_JsonParameters extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     public function getParameter($name)
@@ -85,11 +85,11 @@ class Symfony_DI_PhpDumper_Test_JsonParameters extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'hello' => false,
         'hello-bar' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -119,9 +119,9 @@ class Symfony_DI_PhpDumper_Test_JsonParameters extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(foo)' => '["foo","bar"]',
             'env(bar)' => 'null',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
index 4ea482ee22..5c6d4af8a5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_locator.php
@@ -17,12 +17,12 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar_service' => 'getBarServiceService',
             'foo_service' => 'getFooServiceService',
             'translator.loader_1' => 'getTranslator_Loader1Service',
@@ -31,9 +31,9 @@ class ProjectServiceContainer extends Container
             'translator_1' => 'getTranslator1Service',
             'translator_2' => 'getTranslator2Service',
             'translator_3' => 'getTranslator3Service',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -48,14 +48,14 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'baz_service' => true,
             'translator.loader_1_locator' => true,
             'translator.loader_2_locator' => true,
             'translator.loader_3_locator' => true,
-        );
+        ];
     }
 
     /**
@@ -75,13 +75,13 @@ class ProjectServiceContainer extends Container
      */
     protected function getFooServiceService()
     {
-        return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\ServiceLocator(array('bar' => function () {
+        return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\ServiceLocator(['bar' => function () {
             return ($this->services['bar_service'] ?? $this->getBarServiceService());
         }, 'baz' => function (): \stdClass {
             return ($this->privates['baz_service'] ?? ($this->privates['baz_service'] = new \stdClass()));
         }, 'nil' => function () {
             return NULL;
-        }));
+        }]);
     }
 
     /**
@@ -121,9 +121,9 @@ class ProjectServiceContainer extends Container
      */
     protected function getTranslator1Service()
     {
-        return $this->services['translator_1'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_1' => function () {
+        return $this->services['translator_1'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_1' => function () {
             return ($this->services['translator.loader_1'] ?? ($this->services['translator.loader_1'] = new \stdClass()));
-        })));
+        }]));
     }
 
     /**
@@ -133,9 +133,9 @@ class ProjectServiceContainer extends Container
      */
     protected function getTranslator2Service()
     {
-        $this->services['translator_2'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_2' => function () {
+        $this->services['translator_2'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_2' => function () {
             return ($this->services['translator.loader_2'] ?? ($this->services['translator.loader_2'] = new \stdClass()));
-        })));
+        }]));
 
         $instance->addResource('db', ($this->services['translator.loader_2'] ?? ($this->services['translator.loader_2'] = new \stdClass())), 'nl');
 
@@ -149,9 +149,9 @@ class ProjectServiceContainer extends Container
      */
     protected function getTranslator3Service()
     {
-        $this->services['translator_3'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(array('translator.loader_3' => function () {
+        $this->services['translator_3'] = $instance = new \Symfony\Component\DependencyInjection\Tests\Fixtures\StubbedTranslator(new \Symfony\Component\DependencyInjection\ServiceLocator(['translator.loader_3' => function () {
             return ($this->services['translator.loader_3'] ?? ($this->services['translator.loader_3'] = new \stdClass()));
-        })));
+        }]));
 
         $a = ($this->services['translator.loader_3'] ?? ($this->services['translator.loader_3'] = new \stdClass()));
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy.php
index 24bca7e35b..212f12dd24 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_non_shared_lazy.php
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -41,11 +41,11 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'foo' => true,
-        );
+        ];
     }
 
     protected function createProxy($class, \Closure $factory)
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
index 559a3ecebf..f815c0811d 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar_service' => 'getBarServiceService',
             'foo_service' => 'getFooServiceService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -42,11 +42,11 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'baz_service' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
index db3a5a2815..761d476103 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_in_expression.php
@@ -17,16 +17,16 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'public_foo' => 'getPublicFooService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -41,12 +41,12 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'private_bar' => true,
             'private_foo' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
index 0d3eb62b5b..64cc5df258 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_rot13_env.php
@@ -17,21 +17,21 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Rot13Parameters extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
     private $getService;
 
     public function __construct()
     {
-        $this->getService = \Closure::fromCallable(array($this, 'getService'));
+        $this->getService = \Closure::fromCallable([$this, 'getService']);
         $this->parameters = $this->getDefaultParameters();
 
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'Symfony\\Component\\DependencyInjection\\Tests\\Dumper\\Rot13EnvVarProcessor' => 'getRot13EnvVarProcessorService',
             'container.env_var_processors_locator' => 'getContainer_EnvVarProcessorsLocatorService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -46,11 +46,11 @@ class Symfony_DI_PhpDumper_Test_Rot13Parameters extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             '.service_locator.GU08LT9' => true,
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
@@ -70,9 +70,9 @@ class Symfony_DI_PhpDumper_Test_Rot13Parameters extends Container
      */
     protected function getContainer_EnvVarProcessorsLocatorService()
     {
-        return $this->services['container.env_var_processors_locator'] = new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, array(
-            'rot13' => array('services', 'Symfony\\Component\\DependencyInjection\\Tests\\Dumper\\Rot13EnvVarProcessor', 'getRot13EnvVarProcessorService', false),
-        ));
+        return $this->services['container.env_var_processors_locator'] = new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, [
+            'rot13' => ['services', 'Symfony\\Component\\DependencyInjection\\Tests\\Dumper\\Rot13EnvVarProcessor', 'getRot13EnvVarProcessorService', false],
+        ]);
     }
 
     public function getParameter($name)
@@ -114,10 +114,10 @@ class Symfony_DI_PhpDumper_Test_Rot13Parameters extends Container
         return $this->parameterBag;
     }
 
-    private $loadedDynamicParameters = array(
+    private $loadedDynamicParameters = [
         'hello' => false,
-    );
-    private $dynamicParameters = array();
+    ];
+    private $dynamicParameters = [];
 
     /**
      * Computes a dynamic parameter.
@@ -146,8 +146,8 @@ class Symfony_DI_PhpDumper_Test_Rot13Parameters extends Container
      */
     protected function getDefaultParameters()
     {
-        return array(
+        return [
             'env(foo)' => 'jbeyq',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_service_locator_argument.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_service_locator_argument.php
index 3a43e2ce93..c30a6c9e44 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_service_locator_argument.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_service_locator_argument.php
@@ -17,22 +17,22 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Service_Locator_Argument extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
     private $getService;
 
     public function __construct()
     {
-        $this->getService = \Closure::fromCallable(array($this, 'getService'));
-        $this->services = $this->privates = array();
-        $this->syntheticIds = array(
+        $this->getService = \Closure::fromCallable([$this, 'getService']);
+        $this->services = $this->privates = [];
+        $this->syntheticIds = [
             'foo5' => true,
-        );
-        $this->methodMap = array(
+        ];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'foo1' => 'getFoo1Service',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -47,14 +47,14 @@ class Symfony_DI_PhpDumper_Service_Locator_Argument extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             '.service_locator.38dy3OH' => true,
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'foo2' => true,
             'foo3' => true,
             'foo4' => true,
-        );
+        ];
     }
 
     /**
@@ -66,13 +66,13 @@ class Symfony_DI_PhpDumper_Service_Locator_Argument extends Container
     {
         $this->services['bar'] = $instance = new \stdClass();
 
-        $instance->locator = new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, array(
-            'foo1' => array('services', 'foo1', 'getFoo1Service', false),
-            'foo2' => array('privates', 'foo2', 'getFoo2Service', false),
-            'foo3' => array(false, 'foo3', 'getFoo3Service', false),
-            'foo4' => array('privates', 'foo4', NULL, 'BOOM'),
-            'foo5' => array('services', 'foo5', NULL, false),
-        ));
+        $instance->locator = new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, [
+            'foo1' => ['services', 'foo1', 'getFoo1Service', false],
+            'foo2' => ['privates', 'foo2', 'getFoo2Service', false],
+            'foo3' => [false, 'foo3', 'getFoo3Service', false],
+            'foo4' => ['privates', 'foo4', NULL, 'BOOM'],
+            'foo5' => ['services', 'foo5', NULL, false],
+        ]);
 
         return $instance;
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
index e14b87a967..b60b3b87b3 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_subscriber.php
@@ -17,19 +17,19 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
     private $getService;
 
     public function __construct()
     {
-        $this->getService = \Closure::fromCallable(array($this, 'getService'));
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->getService = \Closure::fromCallable([$this, 'getService']);
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber' => 'getTestServiceSubscriberService',
             'foo_service' => 'getFooServiceService',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -44,13 +44,13 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             '.service_locator.nZQiwdg' => true,
             '.service_locator.nZQiwdg.foo_service' => true,
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition' => true,
-        );
+        ];
     }
 
     /**
@@ -70,12 +70,12 @@ class ProjectServiceContainer extends Container
      */
     protected function getFooServiceService()
     {
-        return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber((new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, array(
-            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition' => array('privates', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition', 'getCustomDefinitionService', false),
-            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber' => array('services', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber', 'getTestServiceSubscriberService', false),
-            'bar' => array('services', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber', 'getTestServiceSubscriberService', false),
-            'baz' => array('privates', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition', 'getCustomDefinitionService', false),
-        )))->withContext('foo_service', $this));
+        return $this->services['foo_service'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\TestServiceSubscriber((new \Symfony\Component\DependencyInjection\Argument\ServiceLocator($this->getService, [
+            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition' => ['privates', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition', 'getCustomDefinitionService', false],
+            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber' => ['services', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber', 'getTestServiceSubscriberService', false],
+            'bar' => ['services', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\TestServiceSubscriber', 'getTestServiceSubscriberService', false],
+            'baz' => ['privates', 'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\CustomDefinition', 'getCustomDefinitionService', false],
+        ]))->withContext('foo_service', $this));
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_tsantos.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_tsantos.php
index a992754433..3aa6ae94a8 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_tsantos.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_tsantos.php
@@ -17,17 +17,17 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class ProjectServiceContainer extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'tsantos_serializer' => 'getTsantosSerializerService',
-        );
-        $this->aliases = array(
+        ];
+        $this->aliases = [
             'TSantos\\Serializer\\SerializerInterface' => 'tsantos_serializer',
-        );
+        ];
     }
 
     public function compile()
@@ -42,10 +42,10 @@ class ProjectServiceContainer extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
index f18de622b2..47e4b8f634 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_uninitialized_ref.php
@@ -17,18 +17,18 @@ use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;
 class Symfony_DI_PhpDumper_Test_Uninitialized_Reference extends Container
 {
     private $parameters;
-    private $targetDirs = array();
+    private $targetDirs = [];
 
     public function __construct()
     {
-        $this->services = $this->privates = array();
-        $this->methodMap = array(
+        $this->services = $this->privates = [];
+        $this->methodMap = [
             'bar' => 'getBarService',
             'baz' => 'getBazService',
             'foo1' => 'getFoo1Service',
-        );
+        ];
 
-        $this->aliases = array();
+        $this->aliases = [];
     }
 
     public function compile()
@@ -43,12 +43,12 @@ class Symfony_DI_PhpDumper_Test_Uninitialized_Reference extends Container
 
     public function getRemovedIds()
     {
-        return array(
+        return [
             'Psr\\Container\\ContainerInterface' => true,
             'Symfony\\Component\\DependencyInjection\\ContainerInterface' => true,
             'foo2' => true,
             'foo3' => true,
-        );
+        ];
     }
 
     /**
@@ -63,13 +63,13 @@ class Symfony_DI_PhpDumper_Test_Uninitialized_Reference extends Container
         $instance->foo1 = ($this->services['foo1'] ?? null);
         $instance->foo2 = null;
         $instance->foo3 = ($this->privates['foo3'] ?? null);
-        $instance->closures = array(0 => function () {
+        $instance->closures = [0 => function () {
             return ($this->services['foo1'] ?? null);
         }, 1 => function () {
             return null;
         }, 2 => function () {
             return ($this->privates['foo3'] ?? null);
-        });
+        }];
         $instance->iter = new RewindableGenerator(function () {
             if (isset($this->services['foo1'])) {
                 yield 'foo1' => ($this->services['foo1'] ?? null);
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
index 559abbe25b..c7c303b683 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/DirectoryLoaderTest.php
@@ -37,25 +37,25 @@ class DirectoryLoaderTest extends TestCase
         $locator = new FileLocator(self::$fixturesPath);
         $this->container = new ContainerBuilder();
         $this->loader = new DirectoryLoader($this->container, $locator);
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new PhpFileLoader($this->container, $locator),
             new IniFileLoader($this->container, $locator),
             new YamlFileLoader($this->container, $locator),
             $this->loader,
-        ));
+        ]);
         $this->loader->setResolver($resolver);
     }
 
     public function testDirectoryCanBeLoadedRecursively()
     {
         $this->loader->load('directory/');
-        $this->assertEquals(array('ini' => 'ini', 'yaml' => 'yaml', 'php' => 'php'), $this->container->getParameterBag()->all(), '->load() takes a single directory');
+        $this->assertEquals(['ini' => 'ini', 'yaml' => 'yaml', 'php' => 'php'], $this->container->getParameterBag()->all(), '->load() takes a single directory');
     }
 
     public function testImports()
     {
         $this->loader->resolve('directory/import/import.yml')->load('directory/import/import.yml');
-        $this->assertEquals(array('ini' => 'ini', 'yaml' => 'yaml'), $this->container->getParameterBag()->all(), '->load() takes a single file that imports a directory');
+        $this->assertEquals(['ini' => 'ini', 'yaml' => 'yaml'], $this->container->getParameterBag()->all(), '->load() takes a single file that imports a directory');
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/FileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/FileLoaderTest.php
index 87971eadd8..b94ee1953f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/FileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/FileLoaderTest.php
@@ -46,21 +46,21 @@ class FileLoaderTest extends TestCase
         $container = new ContainerBuilder();
         $loader = new TestFileLoader($container, new FileLocator(self::$fixturesPath));
 
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new IniFileLoader($container, new FileLocator(self::$fixturesPath.'/ini')),
             new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml')),
             new PhpFileLoader($container, new FileLocator(self::$fixturesPath.'/php')),
             new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml')),
-        ));
+        ]);
 
         $loader->setResolver($resolver);
         $loader->import('{F}ixtures/{xml,yaml}/services2.{yml,xml}');
 
         $actual = $container->getParameterBag()->all();
-        $expected = array(
+        $expected = [
             'a string',
             'foo' => 'bar',
-            'values' => array(
+            'values' => [
                 0,
                 'integer' => 4,
                 100 => null,
@@ -72,14 +72,14 @@ class FileLoaderTest extends TestCase
                 'float' => 1.3,
                 1000.3,
                 'a string',
-                array('foo', 'bar'),
-            ),
-            'mixedcase' => array('MixedCaseKey' => 'value'),
+                ['foo', 'bar'],
+            ],
+            'mixedcase' => ['MixedCaseKey' => 'value'],
             'constant' => PHP_EOL,
             'bar' => '%foo%',
             'escape' => '@escapeme',
             'foo_bar' => new Reference('foo_bar'),
-        );
+        ];
 
         $this->assertEquals(array_keys($expected), array_keys($actual), '->load() imports and merges imported files');
     }
@@ -93,15 +93,15 @@ class FileLoaderTest extends TestCase
         $loader->registerClasses(new Definition(), 'Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\\', 'Prototype/%sub_dir%/*');
 
         $this->assertEquals(
-            array('service_container', Bar::class),
+            ['service_container', Bar::class],
             array_keys($container->getDefinitions())
         );
         $this->assertEquals(
-            array(
+            [
                 PsrContainerInterface::class,
                 ContainerInterface::class,
                 BarInterface::class,
-            ),
+            ],
             array_keys($container->getAliases())
         );
     }
@@ -126,11 +126,11 @@ class FileLoaderTest extends TestCase
         $this->assertFalse($container->has(DeeperBaz::class));
 
         $this->assertEquals(
-            array(
+            [
                 PsrContainerInterface::class,
                 ContainerInterface::class,
                 BarInterface::class,
-            ),
+            ],
             array_keys($container->getAliases())
         );
     }
@@ -143,10 +143,10 @@ class FileLoaderTest extends TestCase
         $loader->registerClasses(
             new Definition(),
             'Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\\',
-            'Prototype/*', array(
+            'Prototype/*', [
                 'Prototype/%sub_dir%',
                 'Prototype/OtherDir/AnotherSub/DeeperBaz.php',
-            )
+            ]
         );
         $this->assertTrue($container->has(Foo::class));
         $this->assertTrue($container->has(Baz::class));
@@ -168,11 +168,11 @@ class FileLoaderTest extends TestCase
         $this->assertTrue($container->has(Foo::class));
 
         $this->assertEquals(
-            array(
+            [
                 PsrContainerInterface::class,
                 ContainerInterface::class,
                 FooInterface::class,
-            ),
+            ],
             array_keys($container->getAliases())
         );
 
@@ -197,7 +197,7 @@ class FileLoaderTest extends TestCase
         $this->assertTrue($container->has(MissingParent::class));
 
         $this->assertSame(
-            array('While discovering services from namespace "Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\", an error was thrown when processing the class "Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\MissingParent": "Class Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\MissingClass not found".'),
+            ['While discovering services from namespace "Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\", an error was thrown when processing the class "Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\MissingParent": "Class Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\BadClasses\MissingClass not found".'],
             $container->getDefinition(MissingParent::class)->getErrors()
         );
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
index 49e08be949..ce8641c750 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/IniFileLoaderTest.php
@@ -30,7 +30,7 @@ class IniFileLoaderTest extends TestCase
     public function testIniFileCanBeLoaded()
     {
         $this->loader->load('parameters.ini');
-        $this->assertEquals(array('foo' => 'bar', 'bar' => '%foo%'), $this->container->getParameterBag()->all(), '->load() takes a single file name as its first argument');
+        $this->assertEquals(['foo' => 'bar', 'bar' => '%foo%'], $this->container->getParameterBag()->all(), '->load() takes a single file name as its first argument');
     }
 
     /**
@@ -59,35 +59,35 @@ class IniFileLoaderTest extends TestCase
 
     public function getTypeConversions()
     {
-        return array(
-            array('true_comment', true, true),
-            array('true', true, true),
-            array('false', false, true),
-            array('on', true, true),
-            array('off', false, true),
-            array('yes', true, true),
-            array('no', false, true),
-            array('none', false, true),
-            array('null', null, true),
-            array('constant', PHP_VERSION, true),
-            array('12', 12, true),
-            array('12_string', '12', true),
-            array('12_quoted_number', 12, false), // INI_SCANNER_RAW removes the double quotes
-            array('12_comment', 12, true),
-            array('12_string_comment', '12', true),
-            array('12_quoted_number_comment', 12, false), // INI_SCANNER_RAW removes the double quotes
-            array('-12', -12, true),
-            array('1', 1, true),
-            array('0', 0, true),
-            array('0b0110', bindec('0b0110'), false), // not supported by INI_SCANNER_TYPED
-            array('11112222333344445555', '1111,2222,3333,4444,5555', true),
-            array('0777', 0777, false), // not supported by INI_SCANNER_TYPED
-            array('255', 0xFF, false), // not supported by INI_SCANNER_TYPED
-            array('100.0', 1e2, false), // not supported by INI_SCANNER_TYPED
-            array('-120.0', -1.2E2, false), // not supported by INI_SCANNER_TYPED
-            array('-10100.1', -10100.1, false), // not supported by INI_SCANNER_TYPED
-            array('-10,100.1', '-10,100.1', true),
-        );
+        return [
+            ['true_comment', true, true],
+            ['true', true, true],
+            ['false', false, true],
+            ['on', true, true],
+            ['off', false, true],
+            ['yes', true, true],
+            ['no', false, true],
+            ['none', false, true],
+            ['null', null, true],
+            ['constant', PHP_VERSION, true],
+            ['12', 12, true],
+            ['12_string', '12', true],
+            ['12_quoted_number', 12, false], // INI_SCANNER_RAW removes the double quotes
+            ['12_comment', 12, true],
+            ['12_string_comment', '12', true],
+            ['12_quoted_number_comment', 12, false], // INI_SCANNER_RAW removes the double quotes
+            ['-12', -12, true],
+            ['1', 1, true],
+            ['0', 0, true],
+            ['0b0110', bindec('0b0110'), false], // not supported by INI_SCANNER_TYPED
+            ['11112222333344445555', '1111,2222,3333,4444,5555', true],
+            ['0777', 0777, false], // not supported by INI_SCANNER_TYPED
+            ['255', 0xFF, false], // not supported by INI_SCANNER_TYPED
+            ['100.0', 1e2, false], // not supported by INI_SCANNER_TYPED
+            ['-120.0', -1.2E2, false], // not supported by INI_SCANNER_TYPED
+            ['-10100.1', -10100.1, false], // not supported by INI_SCANNER_TYPED
+            ['-10,100.1', '-10,100.1', true],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/LoaderResolverTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/LoaderResolverTest.php
index cb2d6ddcc2..9167e18ced 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/LoaderResolverTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/LoaderResolverTest.php
@@ -33,23 +33,23 @@ class LoaderResolverTest extends TestCase
         self::$fixturesPath = realpath(__DIR__.'/../Fixtures/');
 
         $container = new ContainerBuilder();
-        $this->resolver = new LoaderResolver(array(
+        $this->resolver = new LoaderResolver([
             new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml')),
             new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml')),
             new IniFileLoader($container, new FileLocator(self::$fixturesPath.'/ini')),
             new PhpFileLoader($container, new FileLocator(self::$fixturesPath.'/php')),
             new ClosureLoader($container),
-        ));
+        ]);
     }
 
     public function provideResourcesToLoad()
     {
-        return array(
-            array('ini_with_wrong_ext.xml', 'ini', IniFileLoader::class),
-            array('xml_with_wrong_ext.php', 'xml', XmlFileLoader::class),
-            array('php_with_wrong_ext.yml', 'php', PhpFileLoader::class),
-            array('yaml_with_wrong_ext.ini', 'yaml', YamlFileLoader::class),
-        );
+        return [
+            ['ini_with_wrong_ext.xml', 'ini', IniFileLoader::class],
+            ['xml_with_wrong_ext.php', 'xml', XmlFileLoader::class],
+            ['php_with_wrong_ext.yml', 'php', PhpFileLoader::class],
+            ['yaml_with_wrong_ext.ini', 'yaml', YamlFileLoader::class],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
index 5a54688089..48791706a7 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/PhpFileLoaderTest.php
@@ -67,16 +67,16 @@ class PhpFileLoaderTest extends TestCase
 
     public function provideConfig()
     {
-        yield array('basic');
-        yield array('object');
-        yield array('defaults');
-        yield array('instanceof');
-        yield array('prototype');
-        yield array('prototype_array');
-        yield array('child');
-        yield array('php7');
-        yield array('anonymous');
-        yield array('lazy_fqcn');
+        yield ['basic'];
+        yield ['object'];
+        yield ['defaults'];
+        yield ['instanceof'];
+        yield ['prototype'];
+        yield ['prototype_array'];
+        yield ['child'];
+        yield ['php7'];
+        yield ['anonymous'];
+        yield ['lazy_fqcn'];
     }
 
     /**
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
index 18a730041a..6d9634c66c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/XmlFileLoaderTest.php
@@ -113,10 +113,10 @@ class XmlFileLoaderTest extends TestCase
         $loader->load('services2.xml');
 
         $actual = $container->getParameterBag()->all();
-        $expected = array(
+        $expected = [
             'a string',
             'foo' => 'bar',
-            'values' => array(
+            'values' => [
                 0,
                 'integer' => 4,
                 100 => null,
@@ -128,11 +128,11 @@ class XmlFileLoaderTest extends TestCase
                 'float' => 1.3,
                 1000.3,
                 'a string',
-                array('foo', 'bar'),
-            ),
-            'mixedcase' => array('MixedCaseKey' => 'value'),
+                ['foo', 'bar'],
+            ],
+            'mixedcase' => ['MixedCaseKey' => 'value'],
             'constant' => PHP_EOL,
-        );
+        ];
 
         $this->assertEquals($expected, $actual, '->load() converts XML values to PHP ones');
     }
@@ -140,19 +140,19 @@ class XmlFileLoaderTest extends TestCase
     public function testLoadImports()
     {
         $container = new ContainerBuilder();
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new IniFileLoader($container, new FileLocator(self::$fixturesPath.'/ini')),
             new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yml')),
             $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml')),
-        ));
+        ]);
         $loader->setResolver($resolver);
         $loader->load('services4.xml');
 
         $actual = $container->getParameterBag()->all();
-        $expected = array(
+        $expected = [
             'a string',
             'foo' => 'bar',
-            'values' => array(
+            'values' => [
                 0,
                 'integer' => 4,
                 100 => null,
@@ -164,15 +164,15 @@ class XmlFileLoaderTest extends TestCase
                 'float' => 1.3,
                 1000.3,
                 'a string',
-                array('foo', 'bar'),
-            ),
-            'mixedcase' => array('MixedCaseKey' => 'value'),
+                ['foo', 'bar'],
+            ],
+            'mixedcase' => ['MixedCaseKey' => 'value'],
             'constant' => PHP_EOL,
             'bar' => '%foo%',
             'imported_from_ini' => true,
             'imported_from_yaml' => true,
             'with_wrong_ext' => 'from yaml',
-        );
+        ];
 
         $this->assertEquals(array_keys($expected), array_keys($actual), '->load() imports and merges imported files');
         $this->assertTrue($actual['imported_from_ini']);
@@ -257,16 +257,16 @@ class XmlFileLoaderTest extends TestCase
         $this->assertInstanceOf('Symfony\\Component\\DependencyInjection\\Definition', $services['foo'], '->load() converts <service> element to Definition instances');
         $this->assertEquals('FooClass', $services['foo']->getClass(), '->load() parses the class attribute');
         $this->assertEquals('%path%/foo.php', $services['file']->getFile(), '->load() parses the file tag');
-        $this->assertEquals(array('foo', new Reference('foo'), array(true, false)), $services['arguments']->getArguments(), '->load() parses the argument tags');
+        $this->assertEquals(['foo', new Reference('foo'), [true, false]], $services['arguments']->getArguments(), '->load() parses the argument tags');
         $this->assertEquals('sc_configure', $services['configurator1']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array(new Reference('baz'), 'configure'), $services['configurator2']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array('BazClass', 'configureStatic'), $services['configurator3']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array(array('setBar', array()), array('setBar', array(new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')))), $services['method_call1']->getMethodCalls(), '->load() parses the method_call tag');
-        $this->assertEquals(array(array('setBar', array('foo', new Reference('foo'), array(true, false)))), $services['method_call2']->getMethodCalls(), '->load() parses the method_call tag');
+        $this->assertEquals([new Reference('baz'), 'configure'], $services['configurator2']->getConfigurator(), '->load() parses the configurator tag');
+        $this->assertEquals(['BazClass', 'configureStatic'], $services['configurator3']->getConfigurator(), '->load() parses the configurator tag');
+        $this->assertEquals([['setBar', []], ['setBar', [new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')]]], $services['method_call1']->getMethodCalls(), '->load() parses the method_call tag');
+        $this->assertEquals([['setBar', ['foo', new Reference('foo'), [true, false]]]], $services['method_call2']->getMethodCalls(), '->load() parses the method_call tag');
         $this->assertEquals('factory', $services['new_factory1']->getFactory(), '->load() parses the factory tag');
-        $this->assertEquals(array(new Reference('baz'), 'getClass'), $services['new_factory2']->getFactory(), '->load() parses the factory tag');
-        $this->assertEquals(array('BazClass', 'getInstance'), $services['new_factory3']->getFactory(), '->load() parses the factory tag');
-        $this->assertSame(array(null, 'getInstance'), $services['new_factory4']->getFactory(), '->load() accepts factory tag without class');
+        $this->assertEquals([new Reference('baz'), 'getClass'], $services['new_factory2']->getFactory(), '->load() parses the factory tag');
+        $this->assertEquals(['BazClass', 'getInstance'], $services['new_factory3']->getFactory(), '->load() parses the factory tag');
+        $this->assertSame([null, 'getInstance'], $services['new_factory4']->getFactory(), '->load() accepts factory tag without class');
 
         $aliases = $container->getAliases();
         $this->assertArrayHasKey('alias_for_foo', $aliases, '->load() parses <service> elements');
@@ -276,9 +276,9 @@ class XmlFileLoaderTest extends TestCase
         $this->assertEquals('foo', (string) $aliases['another_alias_for_foo']);
         $this->assertFalse($aliases['another_alias_for_foo']->isPublic());
 
-        $this->assertEquals(array('decorated', null, 0), $services['decorator_service']->getDecoratedService());
-        $this->assertEquals(array('decorated', 'decorated.pif-pouf', 0), $services['decorator_service_with_name']->getDecoratedService());
-        $this->assertEquals(array('decorated', 'decorated.pif-pouf', 5), $services['decorator_service_with_name_and_priority']->getDecoratedService());
+        $this->assertEquals(['decorated', null, 0], $services['decorator_service']->getDecoratedService());
+        $this->assertEquals(['decorated', 'decorated.pif-pouf', 0], $services['decorator_service_with_name']->getDecoratedService());
+        $this->assertEquals(['decorated', 'decorated.pif-pouf', 5], $services['decorator_service_with_name_and_priority']->getDecoratedService());
     }
 
     public function testParsesIteratorArgument()
@@ -289,7 +289,7 @@ class XmlFileLoaderTest extends TestCase
 
         $lazyDefinition = $container->getDefinition('lazy_context');
 
-        $this->assertEquals(array(new IteratorArgument(array('k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container'))), new IteratorArgument(array())), $lazyDefinition->getArguments(), '->load() parses lazy arguments');
+        $this->assertEquals([new IteratorArgument(['k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container')]), new IteratorArgument([])], $lazyDefinition->getArguments(), '->load() parses lazy arguments');
     }
 
     public function testParsesTags()
@@ -359,27 +359,27 @@ class XmlFileLoaderTest extends TestCase
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo foo="bar" />');
-        $this->assertEquals(array('foo' => 'bar'), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => 'bar'], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo><foo>bar</foo></foo>');
-        $this->assertEquals(array('foo' => 'bar'), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => 'bar'], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo><foo>bar<foo>bar</foo></foo></foo>');
-        $this->assertEquals(array('foo' => array('value' => 'bar', 'foo' => 'bar')), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => ['value' => 'bar', 'foo' => 'bar']], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo><foo></foo></foo>');
-        $this->assertEquals(array('foo' => null), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => null], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo><foo><!-- foo --></foo></foo>');
-        $this->assertEquals(array('foo' => null), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => null], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
 
         $doc = new \DOMDocument('1.0');
         $doc->loadXML('<foo><foo foo="bar"/><foo foo="bar"/></foo>');
-        $this->assertEquals(array('foo' => array(array('foo' => 'bar'), array('foo' => 'bar'))), XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
+        $this->assertEquals(['foo' => [['foo' => 'bar'], ['foo' => 'bar']]], XmlFileLoader::convertDomElementToArray($doc->documentElement), '::convertDomElementToArray() converts a \DomElement to an array');
     }
 
     public function testExtensions()
@@ -533,7 +533,7 @@ class XmlFileLoaderTest extends TestCase
 
         $this->assertArrayHasKey('foo', $services, '->load() parses <srv:service> elements');
         $this->assertCount(1, $services['foo']->getTag('foo.tag'), '->load parses <srv:tag> elements');
-        $this->assertEquals(array(array('setBar', array('foo'))), $services['foo']->getMethodCalls(), '->load() parses the <srv:call> tag');
+        $this->assertEquals([['setBar', ['foo']]], $services['foo']->getMethodCalls(), '->load() parses the <srv:call> tag');
     }
 
     public function testLoadIndexedArguments()
@@ -542,7 +542,7 @@ class XmlFileLoaderTest extends TestCase
         $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
         $loader->load('services14.xml');
 
-        $this->assertEquals(array('index_0' => 'app'), $container->findDefinition('logger')->getArguments());
+        $this->assertEquals(['index_0' => 'app'], $container->findDefinition('logger')->getArguments());
     }
 
     public function testLoadInlinedServices()
@@ -606,7 +606,7 @@ class XmlFileLoaderTest extends TestCase
 
         $ids = array_keys($container->getDefinitions());
         sort($ids);
-        $this->assertSame(array(Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'), $ids);
+        $this->assertSame([Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'], $ids);
 
         $resources = $container->getResources();
 
@@ -619,10 +619,10 @@ class XmlFileLoaderTest extends TestCase
             '/*',
             true,
             false,
-            array(
+            [
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'OtherDir') => true,
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'BadClasses') => true,
-            )
+            ]
         );
         $this->assertContains((string) $globResource, $resources);
         $resources = array_map('strval', $resources);
@@ -638,7 +638,7 @@ class XmlFileLoaderTest extends TestCase
 
         $ids = array_keys($container->getDefinitions());
         sort($ids);
-        $this->assertSame(array(Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'), $ids);
+        $this->assertSame([Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'], $ids);
 
         $resources = $container->getResources();
 
@@ -651,10 +651,10 @@ class XmlFileLoaderTest extends TestCase
             '/*',
             true,
             false,
-            array(
+            [
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'BadClasses') => true,
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'OtherDir') => true,
-            )
+            ]
         );
         $this->assertContains((string) $globResource, $resources);
         $resources = array_map('strval', $resources);
@@ -682,7 +682,7 @@ class XmlFileLoaderTest extends TestCase
         $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
         $loader->load('with_key_outside_collection.xml');
 
-        $this->assertSame(array('type' => 'foo', 'bar'), $container->getDefinition('foo')->getArguments());
+        $this->assertSame(['type' => 'foo', 'bar'], $container->getDefinition('foo')->getArguments());
     }
 
     public function testDefaults()
@@ -692,7 +692,7 @@ class XmlFileLoaderTest extends TestCase
         $loader->load('services28.xml');
 
         $this->assertFalse($container->getDefinition('with_defaults')->isPublic());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('with_defaults')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('with_defaults')->getTags());
         $this->assertTrue($container->getDefinition('with_defaults')->isAutowired());
         $this->assertArrayNotHasKey('public', $container->getDefinition('with_defaults')->getChanges());
         $this->assertArrayNotHasKey('autowire', $container->getDefinition('with_defaults')->getChanges());
@@ -701,12 +701,12 @@ class XmlFileLoaderTest extends TestCase
 
         $this->assertTrue($container->getDefinition('no_defaults')->isPublic());
 
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('no_defaults')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('no_defaults')->getTags());
 
         $this->assertFalse($container->getDefinition('no_defaults')->isAutowired());
 
         $this->assertTrue($container->getDefinition('child_def')->isPublic());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('child_def')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('child_def')->getTags());
         $this->assertFalse($container->getDefinition('child_def')->isAutowired());
 
         $definitions = $container->getDefinitions();
@@ -717,7 +717,7 @@ class XmlFileLoaderTest extends TestCase
         $this->assertSame('bar', key($definitions));
         $this->assertTrue($anonymous->isPublic());
         $this->assertTrue($anonymous->isAutowired());
-        $this->assertSame(array('foo' => array(array())), $anonymous->getTags());
+        $this->assertSame(['foo' => [[]]], $anonymous->getTags());
     }
 
     public function testNamedArguments()
@@ -726,12 +726,12 @@ class XmlFileLoaderTest extends TestCase
         $loader = new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml'));
         $loader->load('services_named_args.xml');
 
-        $this->assertEquals(array('$apiKey' => 'ABCD', CaseSensitiveClass::class => null), $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
+        $this->assertEquals(['$apiKey' => 'ABCD', CaseSensitiveClass::class => null], $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
 
         $container->compile();
 
-        $this->assertEquals(array(null, 'ABCD'), $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
-        $this->assertEquals(array(array('setApiKey', array('123'))), $container->getDefinition(NamedArgumentsDummy::class)->getMethodCalls());
+        $this->assertEquals([null, 'ABCD'], $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
+        $this->assertEquals([['setApiKey', ['123']]], $container->getDefinition(NamedArgumentsDummy::class)->getMethodCalls());
     }
 
     public function testInstanceof()
@@ -744,7 +744,7 @@ class XmlFileLoaderTest extends TestCase
         $definition = $container->getDefinition(Bar::class);
         $this->assertTrue($definition->isAutowired());
         $this->assertTrue($definition->isLazy());
-        $this->assertSame(array('foo' => array(array()), 'bar' => array(array())), $definition->getTags());
+        $this->assertSame(['foo' => [[]], 'bar' => [[]]], $definition->getTags());
     }
 
     /**
@@ -816,30 +816,30 @@ class XmlFileLoaderTest extends TestCase
         $container->compile();
 
         $definition = $container->getDefinition('bar');
-        $this->assertEquals(array(
+        $this->assertEquals([
             'NonExistent' => null,
             BarInterface::class => new Reference(Bar::class),
-            '$foo' => array(null),
+            '$foo' => [null],
             '$quz' => 'quz',
             '$factory' => 'factory',
-        ), array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
-        $this->assertEquals(array(
+        ], array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
+        $this->assertEquals([
             'quz',
             null,
             new Reference(Bar::class),
-            array(null),
-        ), $definition->getArguments());
+            [null],
+        ], $definition->getArguments());
 
         $definition = $container->getDefinition(Bar::class);
-        $this->assertEquals(array(
+        $this->assertEquals([
             null,
             'factory',
-        ), $definition->getArguments());
-        $this->assertEquals(array(
+        ], $definition->getArguments());
+        $this->assertEquals([
             'NonExistent' => null,
             '$quz' => 'quz',
             '$factory' => 'factory',
-        ), array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
+        ], array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
     }
 
     public function testFqcnLazyProxy()
@@ -849,7 +849,7 @@ class XmlFileLoaderTest extends TestCase
         $loader->load('services_lazy_fqcn.xml');
 
         $definition = $container->getDefinition('foo');
-        $this->assertSame(array(array('interface' => 'SomeInterface')), $definition->getTag('proxy'));
+        $this->assertSame([['interface' => 'SomeInterface']], $definition->getTag('proxy'));
     }
 
     public function testTsantosContainer()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
index 7d8426390c..37e6054f55 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Loader/YamlFileLoaderTest.php
@@ -84,17 +84,17 @@ class YamlFileLoaderTest extends TestCase
 
     public function provideInvalidFiles()
     {
-        return array(
-            array('bad_parameters'),
-            array('bad_imports'),
-            array('bad_import'),
-            array('bad_services'),
-            array('bad_service'),
-            array('bad_calls'),
-            array('bad_format'),
-            array('nonvalid1'),
-            array('nonvalid2'),
-        );
+        return [
+            ['bad_parameters'],
+            ['bad_imports'],
+            ['bad_import'],
+            ['bad_services'],
+            ['bad_service'],
+            ['bad_calls'],
+            ['bad_format'],
+            ['nonvalid1'],
+            ['nonvalid2'],
+        ];
     }
 
     public function testLoadParameters()
@@ -102,33 +102,33 @@ class YamlFileLoaderTest extends TestCase
         $container = new ContainerBuilder();
         $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
         $loader->load('services2.yml');
-        $this->assertEquals(array('foo' => 'bar', 'mixedcase' => array('MixedCaseKey' => 'value'), 'values' => array(true, false, 0, 1000.3, PHP_INT_MAX), 'bar' => 'foo', 'escape' => '@escapeme', 'foo_bar' => new Reference('foo_bar')), $container->getParameterBag()->all(), '->load() converts YAML keys to lowercase');
+        $this->assertEquals(['foo' => 'bar', 'mixedcase' => ['MixedCaseKey' => 'value'], 'values' => [true, false, 0, 1000.3, PHP_INT_MAX], 'bar' => 'foo', 'escape' => '@escapeme', 'foo_bar' => new Reference('foo_bar')], $container->getParameterBag()->all(), '->load() converts YAML keys to lowercase');
     }
 
     public function testLoadImports()
     {
         $container = new ContainerBuilder();
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new IniFileLoader($container, new FileLocator(self::$fixturesPath.'/ini')),
             new XmlFileLoader($container, new FileLocator(self::$fixturesPath.'/xml')),
             new PhpFileLoader($container, new FileLocator(self::$fixturesPath.'/php')),
             $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml')),
-        ));
+        ]);
         $loader->setResolver($resolver);
         $loader->load('services4.yml');
 
         $actual = $container->getParameterBag()->all();
-        $expected = array(
+        $expected = [
             'foo' => 'bar',
-            'values' => array(true, false, PHP_INT_MAX),
+            'values' => [true, false, PHP_INT_MAX],
             'bar' => '%foo%',
             'escape' => '@escapeme',
             'foo_bar' => new Reference('foo_bar'),
-            'mixedcase' => array('MixedCaseKey' => 'value'),
+            'mixedcase' => ['MixedCaseKey' => 'value'],
             'imported_from_ini' => true,
             'imported_from_xml' => true,
             'with_wrong_ext' => 'from yaml',
-        );
+        ];
         $this->assertEquals(array_keys($expected), array_keys($actual), '->load() imports and merges imported files');
         $this->assertTrue($actual['imported_from_ini']);
 
@@ -147,17 +147,17 @@ class YamlFileLoaderTest extends TestCase
         $this->assertInstanceOf('Symfony\\Component\\DependencyInjection\\Definition', $services['foo'], '->load() converts service element to Definition instances');
         $this->assertEquals('FooClass', $services['foo']->getClass(), '->load() parses the class attribute');
         $this->assertEquals('%path%/foo.php', $services['file']->getFile(), '->load() parses the file tag');
-        $this->assertEquals(array('foo', new Reference('foo'), array(true, false)), $services['arguments']->getArguments(), '->load() parses the argument tags');
+        $this->assertEquals(['foo', new Reference('foo'), [true, false]], $services['arguments']->getArguments(), '->load() parses the argument tags');
         $this->assertEquals('sc_configure', $services['configurator1']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array(new Reference('baz'), 'configure'), $services['configurator2']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array('BazClass', 'configureStatic'), $services['configurator3']->getConfigurator(), '->load() parses the configurator tag');
-        $this->assertEquals(array(array('setBar', array()), array('setBar', array()), array('setBar', array(new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')))), $services['method_call1']->getMethodCalls(), '->load() parses the method_call tag');
-        $this->assertEquals(array(array('setBar', array('foo', new Reference('foo'), array(true, false)))), $services['method_call2']->getMethodCalls(), '->load() parses the method_call tag');
+        $this->assertEquals([new Reference('baz'), 'configure'], $services['configurator2']->getConfigurator(), '->load() parses the configurator tag');
+        $this->assertEquals(['BazClass', 'configureStatic'], $services['configurator3']->getConfigurator(), '->load() parses the configurator tag');
+        $this->assertEquals([['setBar', []], ['setBar', []], ['setBar', [new Expression('service("foo").foo() ~ (container.hasParameter("foo") ? parameter("foo") : "default")')]]], $services['method_call1']->getMethodCalls(), '->load() parses the method_call tag');
+        $this->assertEquals([['setBar', ['foo', new Reference('foo'), [true, false]]]], $services['method_call2']->getMethodCalls(), '->load() parses the method_call tag');
         $this->assertEquals('factory', $services['new_factory1']->getFactory(), '->load() parses the factory tag');
-        $this->assertEquals(array(new Reference('baz'), 'getClass'), $services['new_factory2']->getFactory(), '->load() parses the factory tag');
-        $this->assertEquals(array('BazClass', 'getInstance'), $services['new_factory3']->getFactory(), '->load() parses the factory tag');
-        $this->assertSame(array(null, 'getInstance'), $services['new_factory4']->getFactory(), '->load() accepts factory tag without class');
-        $this->assertEquals(array('foo', new Reference('baz')), $services['Acme\WithShortCutArgs']->getArguments(), '->load() parses short service definition');
+        $this->assertEquals([new Reference('baz'), 'getClass'], $services['new_factory2']->getFactory(), '->load() parses the factory tag');
+        $this->assertEquals(['BazClass', 'getInstance'], $services['new_factory3']->getFactory(), '->load() parses the factory tag');
+        $this->assertSame([null, 'getInstance'], $services['new_factory4']->getFactory(), '->load() accepts factory tag without class');
+        $this->assertEquals(['foo', new Reference('baz')], $services['Acme\WithShortCutArgs']->getArguments(), '->load() parses short service definition');
 
         $aliases = $container->getAliases();
         $this->assertArrayHasKey('alias_for_foo', $aliases, '->load() parses aliases');
@@ -170,9 +170,9 @@ class YamlFileLoaderTest extends TestCase
         $this->assertEquals('foo', (string) $aliases['another_third_alias_for_foo']);
         $this->assertTrue($aliases['another_third_alias_for_foo']->isPublic());
 
-        $this->assertEquals(array('decorated', null, 0), $services['decorator_service']->getDecoratedService());
-        $this->assertEquals(array('decorated', 'decorated.pif-pouf', 0), $services['decorator_service_with_name']->getDecoratedService());
-        $this->assertEquals(array('decorated', 'decorated.pif-pouf', 5), $services['decorator_service_with_name_and_priority']->getDecoratedService());
+        $this->assertEquals(['decorated', null, 0], $services['decorator_service']->getDecoratedService());
+        $this->assertEquals(['decorated', 'decorated.pif-pouf', 0], $services['decorator_service_with_name']->getDecoratedService());
+        $this->assertEquals(['decorated', 'decorated.pif-pouf', 5], $services['decorator_service_with_name_and_priority']->getDecoratedService());
     }
 
     public function testLoadFactoryShortSyntax()
@@ -182,8 +182,8 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('services14.yml');
         $services = $container->getDefinitions();
 
-        $this->assertEquals(array(new Reference('baz'), 'getClass'), $services['factory']->getFactory(), '->load() parses the factory tag with service:method');
-        $this->assertEquals(array('FooBacFactory', 'createFooBar'), $services['factory_with_static_call']->getFactory(), '->load() parses the factory tag with Class::method');
+        $this->assertEquals([new Reference('baz'), 'getClass'], $services['factory']->getFactory(), '->load() parses the factory tag with service:method');
+        $this->assertEquals(['FooBacFactory', 'createFooBar'], $services['factory_with_static_call']->getFactory(), '->load() parses the factory tag with Class::method');
     }
 
     public function testLoadConfiguratorShortSyntax()
@@ -193,8 +193,8 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('services_configurator_short_syntax.yml');
         $services = $container->getDefinitions();
 
-        $this->assertEquals(array(new Reference('foo_bar_configurator'), 'configure'), $services['foo_bar']->getConfigurator(), '->load() parses the configurator tag with service:method');
-        $this->assertEquals(array('FooBarConfigurator', 'configureFooBar'), $services['foo_bar_with_static_call']->getConfigurator(), '->load() parses the configurator tag with Class::method');
+        $this->assertEquals([new Reference('foo_bar_configurator'), 'configure'], $services['foo_bar']->getConfigurator(), '->load() parses the configurator tag with service:method');
+        $this->assertEquals(['FooBarConfigurator', 'configureFooBar'], $services['foo_bar_with_static_call']->getConfigurator(), '->load() parses the configurator tag with Class::method');
     }
 
     public function testExtensions()
@@ -230,7 +230,7 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('null_config.yml');
         $container->compile();
 
-        $this->assertSame(array(null), $container->getParameter('project.configs'));
+        $this->assertSame([null], $container->getParameter('project.configs'));
     }
 
     public function testSupports()
@@ -296,9 +296,9 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('services21.yml');
 
         $definition = $container->getDefinition('manager');
-        $this->assertEquals(array(array('setLogger', array(new Reference('logger'))), array('setClass', array('User'))), $definition->getMethodCalls());
-        $this->assertEquals(array(true), $definition->getArguments());
-        $this->assertEquals(array('manager' => array(array('alias' => 'user'))), $definition->getTags());
+        $this->assertEquals([['setLogger', [new Reference('logger')]], ['setClass', ['User']]], $definition->getMethodCalls());
+        $this->assertEquals([true], $definition->getArguments());
+        $this->assertEquals(['manager' => [['alias' => 'user']]], $definition->getTags());
     }
 
     /**
@@ -329,7 +329,7 @@ class YamlFileLoaderTest extends TestCase
 
         $lazyDefinition = $container->getDefinition('lazy_context');
 
-        $this->assertEquals(array(new IteratorArgument(array('k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container'))), new IteratorArgument(array())), $lazyDefinition->getArguments(), '->load() parses lazy arguments');
+        $this->assertEquals([new IteratorArgument(['k1' => new Reference('foo.baz'), 'k2' => new Reference('service_container')]), new IteratorArgument([])], $lazyDefinition->getArguments(), '->load() parses lazy arguments');
     }
 
     public function testAutowire()
@@ -359,7 +359,7 @@ class YamlFileLoaderTest extends TestCase
 
         $ids = array_keys($container->getDefinitions());
         sort($ids);
-        $this->assertSame(array(Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'), $ids);
+        $this->assertSame([Prototype\Foo::class, Prototype\Sub\Bar::class, 'service_container'], $ids);
 
         $resources = $container->getResources();
 
@@ -371,10 +371,10 @@ class YamlFileLoaderTest extends TestCase
             $fixturesDir.'Prototype',
             '',
             true,
-            false, array(
+            false, [
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'BadClasses') => true,
                 str_replace(\DIRECTORY_SEPARATOR, '/', $prototypeRealPath.\DIRECTORY_SEPARATOR.'OtherDir') => true,
-            )
+            ]
         );
         $this->assertContains((string) $globResource, $resources);
         $resources = array_map('strval', $resources);
@@ -391,13 +391,13 @@ class YamlFileLoaderTest extends TestCase
         $ids = array_keys($container->getDefinitions());
         sort($ids);
 
-        $this->assertSame(array(
+        $this->assertSame([
             Prototype\OtherDir\Component1\Dir1\Service1::class,
             Prototype\OtherDir\Component1\Dir2\Service2::class,
             Prototype\OtherDir\Component2\Dir1\Service4::class,
             Prototype\OtherDir\Component2\Dir2\Service5::class,
             'service_container',
-        ), $ids);
+        ], $ids);
 
         $this->assertTrue($container->getDefinition(Prototype\OtherDir\Component1\Dir1\Service1::class)->hasTag('foo'));
         $this->assertTrue($container->getDefinition(Prototype\OtherDir\Component2\Dir1\Service4::class)->hasTag('foo'));
@@ -428,7 +428,7 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('services28.yml');
 
         $this->assertFalse($container->getDefinition('with_defaults')->isPublic());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('with_defaults')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('with_defaults')->getTags());
         $this->assertTrue($container->getDefinition('with_defaults')->isAutowired());
         $this->assertArrayNotHasKey('public', $container->getDefinition('with_defaults')->getChanges());
         $this->assertArrayNotHasKey('autowire', $container->getDefinition('with_defaults')->getChanges());
@@ -437,7 +437,7 @@ class YamlFileLoaderTest extends TestCase
         $this->assertFalse($container->getAlias('with_defaults_aliased_short')->isPublic());
 
         $this->assertFalse($container->getDefinition('Acme\WithShortCutArgs')->isPublic());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('Acme\WithShortCutArgs')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('Acme\WithShortCutArgs')->getTags());
         $this->assertTrue($container->getDefinition('Acme\WithShortCutArgs')->isAutowired());
 
         $container->compile();
@@ -446,14 +446,14 @@ class YamlFileLoaderTest extends TestCase
         $this->assertTrue($container->getDefinition('no_defaults')->isPublic());
 
         // foo tag is inherited from defaults
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('with_null')->getTags());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('no_defaults')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('with_null')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('no_defaults')->getTags());
 
         $this->assertTrue($container->getDefinition('with_null')->isAutowired());
         $this->assertFalse($container->getDefinition('no_defaults')->isAutowired());
 
         $this->assertTrue($container->getDefinition('child_def')->isPublic());
-        $this->assertSame(array('foo' => array(array())), $container->getDefinition('child_def')->getTags());
+        $this->assertSame(['foo' => [[]]], $container->getDefinition('child_def')->getTags());
         $this->assertFalse($container->getDefinition('child_def')->isAutowired());
     }
 
@@ -463,14 +463,14 @@ class YamlFileLoaderTest extends TestCase
         $loader = new YamlFileLoader($container, new FileLocator(self::$fixturesPath.'/yaml'));
         $loader->load('services_named_args.yml');
 
-        $this->assertEquals(array(null, '$apiKey' => 'ABCD'), $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
-        $this->assertEquals(array('$apiKey' => 'ABCD', CaseSensitiveClass::class => null), $container->getDefinition('another_one')->getArguments());
+        $this->assertEquals([null, '$apiKey' => 'ABCD'], $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
+        $this->assertEquals(['$apiKey' => 'ABCD', CaseSensitiveClass::class => null], $container->getDefinition('another_one')->getArguments());
 
         $container->compile();
 
-        $this->assertEquals(array(null, 'ABCD'), $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
-        $this->assertEquals(array(null, 'ABCD'), $container->getDefinition('another_one')->getArguments());
-        $this->assertEquals(array(array('setApiKey', array('123'))), $container->getDefinition('another_one')->getMethodCalls());
+        $this->assertEquals([null, 'ABCD'], $container->getDefinition(NamedArgumentsDummy::class)->getArguments());
+        $this->assertEquals([null, 'ABCD'], $container->getDefinition('another_one')->getArguments());
+        $this->assertEquals([['setApiKey', ['123']]], $container->getDefinition('another_one')->getMethodCalls());
     }
 
     public function testInstanceof()
@@ -483,7 +483,7 @@ class YamlFileLoaderTest extends TestCase
         $definition = $container->getDefinition(Bar::class);
         $this->assertTrue($definition->isAutowired());
         $this->assertTrue($definition->isLazy());
-        $this->assertSame(array('foo' => array(array()), 'bar' => array(array())), $definition->getTags());
+        $this->assertSame(['foo' => [[]], 'bar' => [[]]], $definition->getTags());
     }
 
     /**
@@ -735,30 +735,30 @@ class YamlFileLoaderTest extends TestCase
         $container->compile();
 
         $definition = $container->getDefinition('bar');
-        $this->assertEquals(array(
+        $this->assertEquals([
             'NonExistent' => null,
             BarInterface::class => new Reference(Bar::class),
-            '$foo' => array(null),
+            '$foo' => [null],
             '$quz' => 'quz',
             '$factory' => 'factory',
-        ), array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
-        $this->assertEquals(array(
+        ], array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
+        $this->assertEquals([
             'quz',
             null,
             new Reference(Bar::class),
-            array(null),
-        ), $definition->getArguments());
+            [null],
+        ], $definition->getArguments());
 
         $definition = $container->getDefinition(Bar::class);
-        $this->assertEquals(array(
+        $this->assertEquals([
             null,
             'factory',
-        ), $definition->getArguments());
-        $this->assertEquals(array(
+        ], $definition->getArguments());
+        $this->assertEquals([
             'NonExistent' => null,
             '$quz' => 'quz',
             '$factory' => 'factory',
-        ), array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
+        ], array_map(function (BoundArgument $v) { return $v->getValues()[0]; }, $definition->getBindings()));
     }
 
     public function testFqcnLazyProxy()
@@ -768,6 +768,6 @@ class YamlFileLoaderTest extends TestCase
         $loader->load('services_lazy_fqcn.yml');
 
         $definition = $container->getDefinition('foo');
-        $this->assertSame(array(array('interface' => 'SomeInterface')), $definition->getTag('proxy'));
+        $this->assertSame([['interface' => 'SomeInterface']], $definition->getTag('proxy'));
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ContainerBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ContainerBagTest.php
index 7b9d1dc5da..24ed685e49 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ContainerBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ContainerBagTest.php
@@ -28,13 +28,13 @@ class ContainerBagTest extends TestCase
 
     protected function setUp()
     {
-        $this->parameterBag = new ParameterBag(array('foo' => 'value'));
+        $this->parameterBag = new ParameterBag(['foo' => 'value']);
         $this->containerBag = new ContainerBag(new Container($this->parameterBag));
     }
 
     public function testGetAllParameters()
     {
-        $this->assertSame(array('foo' => 'value'), $this->containerBag->all());
+        $this->assertSame(['foo' => 'value'], $this->containerBag->all());
     }
 
     public function testHasAParameter()
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
index 9abfb45d6e..e7c88d2bb5 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/EnvPlaceholderParameterBagTest.php
@@ -137,7 +137,7 @@ class EnvPlaceholderParameterBagTest extends TestCase
     {
         $bag = new EnvPlaceholderParameterBag();
         $bag->get('env(ARRAY_VAR)');
-        $bag->set('env(ARRAY_VAR)', array());
+        $bag->set('env(ARRAY_VAR)', []);
         $bag->resolve();
     }
 
@@ -158,7 +158,7 @@ class EnvPlaceholderParameterBagTest extends TestCase
     public function testGetThrowsOnBadDefaultValue()
     {
         $bag = new EnvPlaceholderParameterBag();
-        $bag->set('env(ARRAY_VAR)', array());
+        $bag->set('env(ARRAY_VAR)', []);
         $bag->get('env(ARRAY_VAR)');
         $bag->resolve();
     }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
index ef9a66f6cf..b168e0c20a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/FrozenParameterBagTest.php
@@ -18,10 +18,10 @@ class FrozenParameterBagTest extends TestCase
 {
     public function testConstructor()
     {
-        $parameters = array(
+        $parameters = [
             'foo' => 'foo',
             'bar' => 'bar',
-        );
+        ];
         $bag = new FrozenParameterBag($parameters);
         $this->assertEquals($parameters, $bag->all(), '__construct() takes an array of parameters as its first argument');
     }
@@ -31,7 +31,7 @@ class FrozenParameterBagTest extends TestCase
      */
     public function testClear()
     {
-        $bag = new FrozenParameterBag(array());
+        $bag = new FrozenParameterBag([]);
         $bag->clear();
     }
 
@@ -40,7 +40,7 @@ class FrozenParameterBagTest extends TestCase
      */
     public function testSet()
     {
-        $bag = new FrozenParameterBag(array());
+        $bag = new FrozenParameterBag([]);
         $bag->set('foo', 'bar');
     }
 
@@ -49,8 +49,8 @@ class FrozenParameterBagTest extends TestCase
      */
     public function testAdd()
     {
-        $bag = new FrozenParameterBag(array());
-        $bag->add(array());
+        $bag = new FrozenParameterBag([]);
+        $bag->add([]);
     }
 
     /**
@@ -58,7 +58,7 @@ class FrozenParameterBagTest extends TestCase
      */
     public function testRemove()
     {
-        $bag = new FrozenParameterBag(array('foo' => 'bar'));
+        $bag = new FrozenParameterBag(['foo' => 'bar']);
         $bag->remove('foo');
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
index 3d79742ef4..071cb39ceb 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ParameterBag/ParameterBagTest.php
@@ -21,36 +21,36 @@ class ParameterBagTest extends TestCase
 {
     public function testConstructor()
     {
-        $bag = new ParameterBag($parameters = array(
+        $bag = new ParameterBag($parameters = [
             'foo' => 'foo',
             'bar' => 'bar',
-        ));
+        ]);
         $this->assertEquals($parameters, $bag->all(), '__construct() takes an array of parameters as its first argument');
     }
 
     public function testClear()
     {
-        $bag = new ParameterBag($parameters = array(
+        $bag = new ParameterBag($parameters = [
             'foo' => 'foo',
             'bar' => 'bar',
-        ));
+        ]);
         $bag->clear();
-        $this->assertEquals(array(), $bag->all(), '->clear() removes all parameters');
+        $this->assertEquals([], $bag->all(), '->clear() removes all parameters');
     }
 
     public function testRemove()
     {
-        $bag = new ParameterBag(array(
+        $bag = new ParameterBag([
             'foo' => 'foo',
             'bar' => 'bar',
-        ));
+        ]);
         $bag->remove('foo');
-        $this->assertEquals(array('bar' => 'bar'), $bag->all(), '->remove() removes a parameter');
+        $this->assertEquals(['bar' => 'bar'], $bag->all(), '->remove() removes a parameter');
     }
 
     public function testGetSet()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
         $bag->set('bar', 'foo');
         $this->assertEquals('foo', $bag->get('bar'), '->set() sets the value of a new parameter');
 
@@ -71,12 +71,12 @@ class ParameterBagTest extends TestCase
      */
     public function testGetThrowParameterNotFoundException($parameterKey, $exceptionMessage)
     {
-        $bag = new ParameterBag(array(
+        $bag = new ParameterBag([
             'foo' => 'foo',
             'bar' => 'bar',
             'baz' => 'baz',
-            'fiz' => array('bar' => array('boo' => 12)),
-        ));
+            'fiz' => ['bar' => ['boo' => 12]],
+        ]);
 
         if (method_exists($this, 'expectException')) {
             $this->expectException(ParameterNotFoundException::class);
@@ -90,32 +90,32 @@ class ParameterBagTest extends TestCase
 
     public function provideGetThrowParameterNotFoundExceptionData()
     {
-        return array(
-            array('foo1', 'You have requested a non-existent parameter "foo1". Did you mean this: "foo"?'),
-            array('bag', 'You have requested a non-existent parameter "bag". Did you mean one of these: "bar", "baz"?'),
-            array('', 'You have requested a non-existent parameter "".'),
+        return [
+            ['foo1', 'You have requested a non-existent parameter "foo1". Did you mean this: "foo"?'],
+            ['bag', 'You have requested a non-existent parameter "bag". Did you mean one of these: "bar", "baz"?'],
+            ['', 'You have requested a non-existent parameter "".'],
 
-            array('fiz.bar.boo', 'You have requested a non-existent parameter "fiz.bar.boo". You cannot access nested array items, do you want to inject "fiz" instead?'),
-        );
+            ['fiz.bar.boo', 'You have requested a non-existent parameter "fiz.bar.boo". You cannot access nested array items, do you want to inject "fiz" instead?'],
+        ];
     }
 
     public function testHas()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
         $this->assertTrue($bag->has('foo'), '->has() returns true if a parameter is defined');
         $this->assertFalse($bag->has('bar'), '->has() returns false if a parameter is not defined');
     }
 
     public function testMixedCase()
     {
-        $bag = new ParameterBag(array(
+        $bag = new ParameterBag([
             'foo' => 'foo',
             'bar' => 'bar',
             'BAR' => 'baz',
-        ));
+        ]);
 
         $bag->remove('BAR');
-        $this->assertEquals(array('foo' => 'foo', 'bar' => 'bar'), $bag->all());
+        $this->assertEquals(['foo' => 'foo', 'bar' => 'bar'], $bag->all());
 
         $bag->set('Foo', 'baz1');
         $this->assertEquals('foo', $bag->get('foo'));
@@ -124,29 +124,29 @@ class ParameterBagTest extends TestCase
 
     public function testResolveValue()
     {
-        $bag = new ParameterBag(array());
+        $bag = new ParameterBag([]);
         $this->assertEquals('foo', $bag->resolveValue('foo'), '->resolveValue() returns its argument unmodified if no placeholders are found');
 
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
         $this->assertEquals('I\'m a bar', $bag->resolveValue('I\'m a %foo%'), '->resolveValue() replaces placeholders by their values');
-        $this->assertEquals(array('bar' => 'bar'), $bag->resolveValue(array('%foo%' => '%foo%')), '->resolveValue() replaces placeholders in keys and values of arrays');
-        $this->assertEquals(array('bar' => array('bar' => array('bar' => 'bar'))), $bag->resolveValue(array('%foo%' => array('%foo%' => array('%foo%' => '%foo%')))), '->resolveValue() replaces placeholders in nested arrays');
+        $this->assertEquals(['bar' => 'bar'], $bag->resolveValue(['%foo%' => '%foo%']), '->resolveValue() replaces placeholders in keys and values of arrays');
+        $this->assertEquals(['bar' => ['bar' => ['bar' => 'bar']]], $bag->resolveValue(['%foo%' => ['%foo%' => ['%foo%' => '%foo%']]]), '->resolveValue() replaces placeholders in nested arrays');
         $this->assertEquals('I\'m a %%foo%%', $bag->resolveValue('I\'m a %%foo%%'), '->resolveValue() supports % escaping by doubling it');
         $this->assertEquals('I\'m a bar %%foo bar', $bag->resolveValue('I\'m a %foo% %%foo %foo%'), '->resolveValue() supports % escaping by doubling it');
-        $this->assertEquals(array('foo' => array('bar' => array('ding' => 'I\'m a bar %%foo %%bar'))), $bag->resolveValue(array('foo' => array('bar' => array('ding' => 'I\'m a bar %%foo %%bar')))), '->resolveValue() supports % escaping by doubling it');
+        $this->assertEquals(['foo' => ['bar' => ['ding' => 'I\'m a bar %%foo %%bar']]], $bag->resolveValue(['foo' => ['bar' => ['ding' => 'I\'m a bar %%foo %%bar']]]), '->resolveValue() supports % escaping by doubling it');
 
-        $bag = new ParameterBag(array('foo' => true));
+        $bag = new ParameterBag(['foo' => true]);
         $this->assertTrue($bag->resolveValue('%foo%'), '->resolveValue() replaces arguments that are just a placeholder by their value without casting them to strings');
-        $bag = new ParameterBag(array('foo' => null));
+        $bag = new ParameterBag(['foo' => null]);
         $this->assertNull($bag->resolveValue('%foo%'), '->resolveValue() replaces arguments that are just a placeholder by their value without casting them to strings');
 
-        $bag = new ParameterBag(array('foo' => 'bar', 'baz' => '%%%foo% %foo%%% %%foo%% %%%foo%%%'));
+        $bag = new ParameterBag(['foo' => 'bar', 'baz' => '%%%foo% %foo%%% %%foo%% %%%foo%%%']);
         $this->assertEquals('%%bar bar%% %%foo%% %%bar%%', $bag->resolveValue('%baz%'), '->resolveValue() replaces params placed besides escaped %');
 
-        $bag = new ParameterBag(array('baz' => '%%s?%%s'));
+        $bag = new ParameterBag(['baz' => '%%s?%%s']);
         $this->assertEquals('%%s?%%s', $bag->resolveValue('%baz%'), '->resolveValue() is not replacing greedily');
 
-        $bag = new ParameterBag(array());
+        $bag = new ParameterBag([]);
         try {
             $bag->resolveValue('%foobar%');
             $this->fail('->resolveValue() throws an InvalidArgumentException if a placeholder references a non-existent parameter');
@@ -161,7 +161,7 @@ class ParameterBagTest extends TestCase
             $this->assertEquals('You have requested a non-existent parameter "foobar".', $e->getMessage(), '->resolveValue() throws a ParameterNotFoundException if a placeholder references a non-existent parameter');
         }
 
-        $bag = new ParameterBag(array('foo' => 'a %bar%', 'bar' => array()));
+        $bag = new ParameterBag(['foo' => 'a %bar%', 'bar' => []]);
         try {
             $bag->resolveValue('%foo%');
             $this->fail('->resolveValue() throws a RuntimeException when a parameter embeds another non-string parameter');
@@ -169,7 +169,7 @@ class ParameterBagTest extends TestCase
             $this->assertEquals('A string value must be composed of strings and/or numbers, but found parameter "bar" of type array inside string value "a %bar%".', $e->getMessage(), '->resolveValue() throws a RuntimeException when a parameter embeds another non-string parameter');
         }
 
-        $bag = new ParameterBag(array('foo' => '%bar%', 'bar' => '%foobar%', 'foobar' => '%foo%'));
+        $bag = new ParameterBag(['foo' => '%bar%', 'bar' => '%foobar%', 'foobar' => '%foo%']);
         try {
             $bag->resolveValue('%foo%');
             $this->fail('->resolveValue() throws a ParameterCircularReferenceException when a parameter has a circular reference');
@@ -177,7 +177,7 @@ class ParameterBagTest extends TestCase
             $this->assertEquals('Circular reference detected for parameter "foo" ("foo" > "bar" > "foobar" > "foo").', $e->getMessage(), '->resolveValue() throws a ParameterCircularReferenceException when a parameter has a circular reference');
         }
 
-        $bag = new ParameterBag(array('foo' => 'a %bar%', 'bar' => 'a %foobar%', 'foobar' => 'a %foo%'));
+        $bag = new ParameterBag(['foo' => 'a %bar%', 'bar' => 'a %foobar%', 'foobar' => 'a %foo%']);
         try {
             $bag->resolveValue('%foo%');
             $this->fail('->resolveValue() throws a ParameterCircularReferenceException when a parameter has a circular reference');
@@ -185,13 +185,13 @@ class ParameterBagTest extends TestCase
             $this->assertEquals('Circular reference detected for parameter "foo" ("foo" > "bar" > "foobar" > "foo").', $e->getMessage(), '->resolveValue() throws a ParameterCircularReferenceException when a parameter has a circular reference');
         }
 
-        $bag = new ParameterBag(array('host' => 'foo.bar', 'port' => 1337));
+        $bag = new ParameterBag(['host' => 'foo.bar', 'port' => 1337]);
         $this->assertEquals('foo.bar:1337', $bag->resolveValue('%host%:%port%'));
     }
 
     public function testResolveIndicatesWhyAParameterIsNeeded()
     {
-        $bag = new ParameterBag(array('foo' => '%bar%'));
+        $bag = new ParameterBag(['foo' => '%bar%']);
 
         try {
             $bag->resolve();
@@ -199,7 +199,7 @@ class ParameterBagTest extends TestCase
             $this->assertEquals('The parameter "foo" has a dependency on a non-existent parameter "bar".', $e->getMessage());
         }
 
-        $bag = new ParameterBag(array('foo' => '%bar%'));
+        $bag = new ParameterBag(['foo' => '%bar%']);
 
         try {
             $bag->resolve();
@@ -210,28 +210,28 @@ class ParameterBagTest extends TestCase
 
     public function testResolveUnescapesValue()
     {
-        $bag = new ParameterBag(array(
-            'foo' => array('bar' => array('ding' => 'I\'m a bar %%foo %%bar')),
+        $bag = new ParameterBag([
+            'foo' => ['bar' => ['ding' => 'I\'m a bar %%foo %%bar']],
             'bar' => 'I\'m a %%foo%%',
-        ));
+        ]);
 
         $bag->resolve();
 
         $this->assertEquals('I\'m a %foo%', $bag->get('bar'), '->resolveValue() supports % escaping by doubling it');
-        $this->assertEquals(array('bar' => array('ding' => 'I\'m a bar %foo %bar')), $bag->get('foo'), '->resolveValue() supports % escaping by doubling it');
+        $this->assertEquals(['bar' => ['ding' => 'I\'m a bar %foo %bar']], $bag->get('foo'), '->resolveValue() supports % escaping by doubling it');
     }
 
     public function testEscapeValue()
     {
         $bag = new ParameterBag();
 
-        $bag->add(array(
-            'foo' => $bag->escapeValue(array('bar' => array('ding' => 'I\'m a bar %foo %bar', 'zero' => null))),
+        $bag->add([
+            'foo' => $bag->escapeValue(['bar' => ['ding' => 'I\'m a bar %foo %bar', 'zero' => null]]),
             'bar' => $bag->escapeValue('I\'m a %foo%'),
-        ));
+        ]);
 
         $this->assertEquals('I\'m a %%foo%%', $bag->get('bar'), '->escapeValue() escapes % by doubling it');
-        $this->assertEquals(array('bar' => array('ding' => 'I\'m a bar %%foo %%bar', 'zero' => null)), $bag->get('foo'), '->escapeValue() escapes % by doubling it');
+        $this->assertEquals(['bar' => ['ding' => 'I\'m a bar %%foo %%bar', 'zero' => null]], $bag->get('foo'), '->escapeValue() escapes % by doubling it');
     }
 
     /**
@@ -239,7 +239,7 @@ class ParameterBagTest extends TestCase
      */
     public function testResolveStringWithSpacesReturnsString($expected, $test, $description)
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
 
         try {
             $this->assertEquals($expected, $bag->resolveString($test), $description);
@@ -250,11 +250,11 @@ class ParameterBagTest extends TestCase
 
     public function stringsWithSpacesProvider()
     {
-        return array(
-            array('bar', '%foo%', 'Parameters must be wrapped by %.'),
-            array('% foo %', '% foo %', 'Parameters should not have spaces.'),
-            array('{% set my_template = "foo" %}', '{% set my_template = "foo" %}', 'Twig-like strings are not parameters.'),
-            array('50% is less than 100%', '50% is less than 100%', 'Text between % signs is allowed, if there are spaces.'),
-        );
+        return [
+            ['bar', '%foo%', 'Parameters must be wrapped by %.'],
+            ['% foo %', '% foo %', 'Parameters should not have spaces.'],
+            ['{% set my_template = "foo" %}', '{% set my_template = "foo" %}', 'Twig-like strings are not parameters.'],
+            ['50% is less than 100%', '50% is less than 100%', 'Text between % signs is allowed, if there are spaces.'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ServiceLocatorTest.php b/src/Symfony/Component/DependencyInjection/Tests/ServiceLocatorTest.php
index 3b5c9bb009..9c0962880f 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ServiceLocatorTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ServiceLocatorTest.php
@@ -29,10 +29,10 @@ class ServiceLocatorTest extends BaseServiceLocatorTest
      */
     public function testGetThrowsOnUndefinedService()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () { return 'bar'; },
             'bar' => function () { return 'baz'; },
-        ));
+        ]);
 
         $locator->get('dummy');
     }
@@ -55,7 +55,7 @@ class ServiceLocatorTest extends BaseServiceLocatorTest
         $container = new Container();
         $container->set('foo', new \stdClass());
         $subscriber = new SomeServiceSubscriber();
-        $subscriber->container = $this->getServiceLocator(array('bar' => function () {}));
+        $subscriber->container = $this->getServiceLocator(['bar' => function () {}]);
         $subscriber->container = $subscriber->container->withContext('caller', $container);
 
         $subscriber->getFoo();
@@ -70,17 +70,17 @@ class ServiceLocatorTest extends BaseServiceLocatorTest
         $container = new Container();
         $container->set('foo', new \stdClass());
 
-        $locator = new ServiceLocator(array());
+        $locator = new ServiceLocator([]);
         $locator = $locator->withContext('foo', $container);
         $locator->get('foo');
     }
 
     public function testInvoke()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () { return 'bar'; },
             'bar' => function () { return 'baz'; },
-        ));
+        ]);
 
         $this->assertSame('bar', $locator('foo'));
         $this->assertSame('baz', $locator('bar'));
@@ -99,6 +99,6 @@ class SomeServiceSubscriber implements ServiceSubscriberInterface
 
     public static function getSubscribedServices()
     {
-        return array('bar' => 'stdClass');
+        return ['bar' => 'stdClass'];
     }
 }
diff --git a/src/Symfony/Component/DomCrawler/AbstractUriElement.php b/src/Symfony/Component/DomCrawler/AbstractUriElement.php
index e26be3fcf6..1ef51df59b 100644
--- a/src/Symfony/Component/DomCrawler/AbstractUriElement.php
+++ b/src/Symfony/Component/DomCrawler/AbstractUriElement.php
@@ -47,7 +47,7 @@ abstract class AbstractUriElement
         $this->currentUri = $currentUri;
 
         $elementUriIsRelative = null === parse_url(trim($this->getRawUri()), PHP_URL_SCHEME);
-        $baseUriIsAbsolute = \in_array(strtolower(substr($this->currentUri, 0, 4)), array('http', 'file'));
+        $baseUriIsAbsolute = \in_array(strtolower(substr($this->currentUri, 0, 4)), ['http', 'file']);
         if ($elementUriIsRelative && !$baseUriIsAbsolute) {
             throw new \InvalidArgumentException(sprintf('The URL of the element is relative, so you must define its base URI passing an absolute URL to the constructor of the %s class ("%s" was passed).', __CLASS__, $this->currentUri));
         }
@@ -146,7 +146,7 @@ abstract class AbstractUriElement
             $path .= '/';
         }
 
-        $output = array();
+        $output = [];
 
         foreach (explode('/', $path) as $segment) {
             if ('..' === $segment) {
diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index 3526a1ebc6..c629d8d041 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -30,7 +30,7 @@ class Crawler implements \Countable, \IteratorAggregate
     /**
      * @var array A map of manually registered namespaces
      */
-    private $namespaces = array();
+    private $namespaces = [];
 
     /**
      * @var string The base href value
@@ -45,7 +45,7 @@ class Crawler implements \Countable, \IteratorAggregate
     /**
      * @var \DOMElement[]
      */
-    private $nodes = array();
+    private $nodes = [];
 
     /**
      * Whether the Crawler contains HTML or XML content (used when converting CSS to XPath).
@@ -92,7 +92,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     public function clear()
     {
-        $this->nodes = array();
+        $this->nodes = [];
         $this->document = null;
     }
 
@@ -208,7 +208,7 @@ class Crawler implements \Countable, \IteratorAggregate
 
         $this->addDocument($dom);
 
-        $base = $this->filterRelativeXPath('descendant-or-self::base')->extract(array('href'));
+        $base = $this->filterRelativeXPath('descendant-or-self::base')->extract(['href']);
 
         $baseHref = current($base);
         if (\count($base) && !empty($baseHref)) {
@@ -363,7 +363,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     public function each(\Closure $closure)
     {
-        $data = array();
+        $data = [];
         foreach ($this->nodes as $i => $node) {
             $data[] = $closure($this->createSubCrawler($node), $i);
         }
@@ -395,7 +395,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     public function reduce(\Closure $closure)
     {
-        $nodes = array();
+        $nodes = [];
         foreach ($this->nodes as $i => $node) {
             if (false !== $closure($this->createSubCrawler($node), $i)) {
                 $nodes[] = $node;
@@ -487,7 +487,7 @@ class Crawler implements \Countable, \IteratorAggregate
         }
 
         $node = $this->getNode(0);
-        $nodes = array();
+        $nodes = [];
 
         while ($node = $node->parentNode) {
             if (XML_ELEMENT_NODE === $node->nodeType) {
@@ -528,7 +528,7 @@ class Crawler implements \Countable, \IteratorAggregate
 
         $node = $this->getNode(0)->firstChild;
 
-        return $this->createSubCrawler($node ? $this->sibling($node) : array());
+        return $this->createSubCrawler($node ? $this->sibling($node) : []);
     }
 
     /**
@@ -632,7 +632,7 @@ class Crawler implements \Countable, \IteratorAggregate
             throw new \LogicException('Cannot evaluate the expression on an uninitialized crawler.');
         }
 
-        $data = array();
+        $data = [];
         $domxpath = $this->createDOMXPath($this->document, $this->findNamespacePrefixes($xpath));
 
         foreach ($this->nodes as $node) {
@@ -653,7 +653,7 @@ class Crawler implements \Countable, \IteratorAggregate
      *
      * Example:
      *
-     *     $crawler->filter('h1 a')->extract(array('_text', 'href'));
+     *     $crawler->filter('h1 a')->extract(['_text', 'href']);
      *
      * @param array $attributes An array of attributes
      *
@@ -664,9 +664,9 @@ class Crawler implements \Countable, \IteratorAggregate
         $attributes = (array) $attributes;
         $count = \count($attributes);
 
-        $data = array();
+        $data = [];
         foreach ($this->nodes as $node) {
-            $elements = array();
+            $elements = [];
             foreach ($attributes as $attribute) {
                 if ('_text' === $attribute) {
                     $elements[] = $node->nodeValue;
@@ -801,7 +801,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     public function links()
     {
-        $links = array();
+        $links = [];
         foreach ($this->nodes as $node) {
             if (!$node instanceof \DOMElement) {
                 throw new \InvalidArgumentException(sprintf('The current node list should contain only DOMElement instances, "%s" found.', \get_class($node)));
@@ -842,7 +842,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     public function images()
     {
-        $images = array();
+        $images = [];
         foreach ($this as $node) {
             if (!$node instanceof \DOMElement) {
                 throw new \InvalidArgumentException(sprintf('The current node list should contain only DOMElement instances, "%s" found.', \get_class($node)));
@@ -936,7 +936,7 @@ class Crawler implements \Countable, \IteratorAggregate
         }
 
         $string = $s;
-        $parts = array();
+        $parts = [];
         while (true) {
             if (false !== $pos = strpos($string, "'")) {
                 $parts[] = sprintf("'%s'", substr($string, 0, $pos));
@@ -982,7 +982,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     private function relativize(string $xpath): string
     {
-        $expressions = array();
+        $expressions = [];
 
         // An expression which will never match to replace expressions which cannot match in the crawler
         // We cannot simply drop
@@ -1100,7 +1100,7 @@ class Crawler implements \Countable, \IteratorAggregate
      */
     protected function sibling($node, $siblingDir = 'nextSibling')
     {
-        $nodes = array();
+        $nodes = [];
 
         $currentNode = $this->getNode(0);
         do {
@@ -1115,7 +1115,7 @@ class Crawler implements \Countable, \IteratorAggregate
     /**
      * @throws \InvalidArgumentException
      */
-    private function createDOMXPath(\DOMDocument $document, array $prefixes = array()): \DOMXPath
+    private function createDOMXPath(\DOMDocument $document, array $prefixes = []): \DOMXPath
     {
         $domxpath = new \DOMXPath($document);
 
@@ -1154,7 +1154,7 @@ class Crawler implements \Countable, \IteratorAggregate
             return array_unique($matches['prefix']);
         }
 
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php b/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
index c5c5f05e4a..8fa1903755 100644
--- a/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/ChoiceFormField.php
@@ -45,7 +45,7 @@ class ChoiceFormField extends FormField
     public function hasValue()
     {
         // don't send a value for unchecked checkboxes
-        if (\in_array($this->type, array('checkbox', 'radio')) && null === $this->value) {
+        if (\in_array($this->type, ['checkbox', 'radio']) && null === $this->value) {
             return false;
         }
 
@@ -211,7 +211,7 @@ class ChoiceFormField extends FormField
         }
 
         $this->value = null;
-        $this->options = array();
+        $this->options = [];
         $this->multiple = false;
 
         if ('input' == $this->node->nodeName) {
@@ -226,7 +226,7 @@ class ChoiceFormField extends FormField
             $this->type = 'select';
             if ($this->node->hasAttribute('multiple')) {
                 $this->multiple = true;
-                $this->value = array();
+                $this->value = [];
                 $this->name = str_replace('[]', '', $this->name);
             }
 
@@ -257,7 +257,7 @@ class ChoiceFormField extends FormField
      */
     private function buildOptionValue(\DOMElement $node): array
     {
-        $option = array();
+        $option = [];
 
         $defaultDefaultValue = 'select' === $this->node->nodeName ? '' : 'on';
         $defaultValue = (isset($node->nodeValue) && !empty($node->nodeValue)) ? $node->nodeValue : $defaultDefaultValue;
@@ -297,7 +297,7 @@ class ChoiceFormField extends FormField
      */
     public function availableOptionValues()
     {
-        $values = array();
+        $values = [];
 
         foreach ($this->options as $option) {
             $values[] = $option['value'];
diff --git a/src/Symfony/Component/DomCrawler/Field/FileFormField.php b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
index 3288fc135a..af9c6e6f25 100644
--- a/src/Symfony/Component/DomCrawler/Field/FileFormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/FileFormField.php
@@ -27,12 +27,12 @@ class FileFormField extends FormField
      */
     public function setErrorCode($error)
     {
-        $codes = array(UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_EXTENSION);
+        $codes = [UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_EXTENSION];
         if (!\in_array($error, $codes)) {
             throw new \InvalidArgumentException(sprintf('The error code %s is not valid.', $error));
         }
 
-        $this->value = array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => $error, 'size' => 0);
+        $this->value = ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => $error, 'size' => 0];
     }
 
     /**
@@ -75,7 +75,7 @@ class FileFormField extends FormField
             $value = '';
         }
 
-        $this->value = array('name' => $name, 'type' => '', 'tmp_name' => $value, 'error' => $error, 'size' => $size);
+        $this->value = ['name' => $name, 'type' => '', 'tmp_name' => $value, 'error' => $error, 'size' => $size];
     }
 
     /**
diff --git a/src/Symfony/Component/DomCrawler/Form.php b/src/Symfony/Component/DomCrawler/Form.php
index 87b2bb9861..339603d09e 100644
--- a/src/Symfony/Component/DomCrawler/Form.php
+++ b/src/Symfony/Component/DomCrawler/Form.php
@@ -87,7 +87,7 @@ class Form extends Link implements \ArrayAccess
      */
     public function getValues()
     {
-        $values = array();
+        $values = [];
         foreach ($this->fields->all() as $name => $field) {
             if ($field->isDisabled()) {
                 continue;
@@ -108,11 +108,11 @@ class Form extends Link implements \ArrayAccess
      */
     public function getFiles()
     {
-        if (!\in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
-            return array();
+        if (!\in_array($this->getMethod(), ['POST', 'PUT', 'DELETE', 'PATCH'])) {
+            return [];
         }
 
-        $files = array();
+        $files = [];
 
         foreach ($this->fields->all() as $name => $field) {
             if ($field->isDisabled()) {
@@ -137,13 +137,13 @@ class Form extends Link implements \ArrayAccess
      */
     public function getPhpValues()
     {
-        $values = array();
+        $values = [];
         foreach ($this->getValues() as $name => $value) {
-            $qs = http_build_query(array($name => $value), '', '&');
+            $qs = http_build_query([$name => $value], '', '&');
             if (!empty($qs)) {
                 parse_str($qs, $expandedValue);
                 $varName = substr($name, 0, \strlen(key($expandedValue)));
-                $values = array_replace_recursive($values, array($varName => current($expandedValue)));
+                $values = array_replace_recursive($values, [$varName => current($expandedValue)]);
             }
         }
 
@@ -164,9 +164,9 @@ class Form extends Link implements \ArrayAccess
      */
     public function getPhpFiles()
     {
-        $values = array();
+        $values = [];
         foreach ($this->getFiles() as $name => $value) {
-            $qs = http_build_query(array($name => $value), '', '&');
+            $qs = http_build_query([$name => $value], '', '&');
             if (!empty($qs)) {
                 parse_str($qs, $expandedValue);
                 $varName = substr($name, 0, \strlen(key($expandedValue)));
@@ -182,7 +182,7 @@ class Form extends Link implements \ArrayAccess
 
                 reset($expandedValue);
 
-                $values = array_replace_recursive($values, array($varName => current($expandedValue)));
+                $values = array_replace_recursive($values, [$varName => current($expandedValue)]);
             }
         }
 
@@ -202,9 +202,9 @@ class Form extends Link implements \ArrayAccess
     {
         $uri = parent::getUri();
 
-        if (!\in_array($this->getMethod(), array('POST', 'PUT', 'DELETE', 'PATCH'))) {
+        if (!\in_array($this->getMethod(), ['POST', 'PUT', 'DELETE', 'PATCH'])) {
             $query = parse_url($uri, PHP_URL_QUERY);
-            $currentParameters = array();
+            $currentParameters = [];
             if ($query) {
                 parse_str($query, $currentParameters);
             }
@@ -379,7 +379,7 @@ class Form extends Link implements \ArrayAccess
     protected function setNode(\DOMElement $node)
     {
         $this->button = $node;
-        if ('button' === $node->nodeName || ('input' === $node->nodeName && \in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image')))) {
+        if ('button' === $node->nodeName || ('input' === $node->nodeName && \in_array(strtolower($node->getAttribute('type')), ['submit', 'button', 'image']))) {
             if ($node->hasAttribute('form')) {
                 // if the node has the HTML5-compliant 'form' attribute, use it
                 $formId = $node->getAttribute('form');
@@ -480,7 +480,7 @@ class Form extends Link implements \ArrayAccess
             }
         } elseif ('input' == $nodeName && 'file' == strtolower($node->getAttribute('type'))) {
             $this->set(new Field\FileFormField($node));
-        } elseif ('input' == $nodeName && !\in_array(strtolower($node->getAttribute('type')), array('submit', 'button', 'image'))) {
+        } elseif ('input' == $nodeName && !\in_array(strtolower($node->getAttribute('type')), ['submit', 'button', 'image'])) {
             $this->set(new Field\InputFormField($node));
         } elseif ('textarea' == $nodeName) {
             $this->set(new Field\TextareaFormField($node));
diff --git a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
index 6398cc6069..10c7e8cb36 100644
--- a/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
+++ b/src/Symfony/Component/DomCrawler/FormFieldRegistry.php
@@ -20,7 +20,7 @@ use Symfony\Component\DomCrawler\Field\FormField;
  */
 class FormFieldRegistry
 {
-    private $fields = array();
+    private $fields = [];
 
     private $base;
 
@@ -34,7 +34,7 @@ class FormFieldRegistry
         $target = &$this->fields;
         while ($segments) {
             if (!\is_array($target)) {
-                $target = array();
+                $target = [];
             }
             $path = array_shift($segments);
             if ('' === $path) {
@@ -133,7 +133,7 @@ class FormFieldRegistry
     /**
      * Returns the list of field with their value.
      *
-     * @return FormField[] The list of fields as array((string) Fully qualified name => (mixed) value)
+     * @return FormField[] The list of fields as [string] Fully qualified name => (mixed) value)
      */
     public function all()
     {
@@ -167,9 +167,9 @@ class FormFieldRegistry
      * @param string $base   The name of the base field
      * @param array  $output The initial values
      *
-     * @return array The list of fields as array((string) Fully qualified name => (mixed) value)
+     * @return array The list of fields as [string] Fully qualified name => (mixed) value)
      */
-    private function walk(array $array, $base = '', array &$output = array())
+    private function walk(array $array, $base = '', array &$output = [])
     {
         foreach ($array as $k => $v) {
             $path = empty($base) ? $k : sprintf('%s[%s]', $base, $k);
@@ -186,7 +186,7 @@ class FormFieldRegistry
     /**
      * Splits a field name into segments as a web browser would do.
      *
-     *     getSegments('base[foo][3][]') = array('base', 'foo, '3', '');
+     *     getSegments('base[foo][3][]') = ['base', 'foo, '3', ''];
      *
      * @param string $name The name of the field
      *
@@ -195,7 +195,7 @@ class FormFieldRegistry
     private function getSegments($name)
     {
         if (preg_match('/^(?P<base>[^[]+)(?P<extra>(\[.*)|$)/', $name, $m)) {
-            $segments = array($m['base']);
+            $segments = [$m['base']];
             while (!empty($m['extra'])) {
                 $extra = $m['extra'];
                 if (preg_match('/^\[(?P<segment>.*?)\](?P<extra>.*)$/', $extra, $m)) {
@@ -208,6 +208,6 @@ class FormFieldRegistry
             return $segments;
         }
 
-        return array($name);
+        return [$name];
     }
 }
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/ChoiceFormFieldTest.php b/src/Symfony/Component/DomCrawler/Tests/Field/ChoiceFormFieldTest.php
index 9592286305..61e776736a 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/ChoiceFormFieldTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/ChoiceFormFieldTest.php
@@ -25,7 +25,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->initialize() throws a \LogicException if the node is not an input or a select');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'text'));
+        $node = $this->createNode('input', '', ['type' => 'text']);
         try {
             $field = new ChoiceFormField($node);
             $this->fail('->initialize() throws a \LogicException if the node is an input with a type different from checkbox or radio');
@@ -36,12 +36,12 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testGetType()
     {
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $this->assertEquals('radio', $field->getType(), '->getType() returns radio for radio buttons');
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $this->assertEquals('checkbox', $field->getType(), '->getType() returns radio for a checkbox');
@@ -54,12 +54,12 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testIsMultiple()
     {
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $this->assertFalse($field->isMultiple(), '->isMultiple() returns false for radio buttons');
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $this->assertFalse($field->isMultiple(), '->isMultiple() returns false for checkboxes');
@@ -69,12 +69,12 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
         $this->assertFalse($field->isMultiple(), '->isMultiple() returns false for selects without the multiple attribute');
 
-        $node = $this->createNode('select', '', array('multiple' => 'multiple'));
+        $node = $this->createNode('select', '', ['multiple' => 'multiple']);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->isMultiple(), '->isMultiple() returns true for selects with the multiple attribute');
 
-        $node = $this->createNode('select', '', array('multiple' => ''));
+        $node = $this->createNode('select', '', ['multiple' => '']);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->isMultiple(), '->isMultiple() returns true for selects with an empty multiple attribute');
@@ -82,14 +82,14 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testSelects()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->hasValue(), '->hasValue() returns true for selects');
         $this->assertEquals('foo', $field->getValue(), '->getValue() returns the first option if none are selected');
         $this->assertFalse($field->isMultiple(), '->isMultiple() returns false when no multiple attribute is defined');
 
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => true));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => true]);
         $field = new ChoiceFormField($node);
 
         $this->assertEquals('bar', $field->getValue(), '->getValue() returns the selected option');
@@ -105,7 +105,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
         }
 
         try {
-            $field->setValue(array('foobar'));
+            $field->setValue(['foobar']);
             $this->fail('->setValue() throws an \InvalidArgumentException if the value is an array');
         } catch (\InvalidArgumentException $e) {
             $this->assertTrue(true, '->setValue() throws an \InvalidArgumentException if the value is an array');
@@ -114,7 +114,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testSelectWithEmptyBooleanAttribute()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => true), array(), '');
+        $node = $this->createSelectNode(['foo' => false, 'bar' => true], [], '');
         $field = new ChoiceFormField($node);
 
         $this->assertEquals('bar', $field->getValue());
@@ -122,7 +122,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testSelectIsDisabled()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => true), array('disabled' => 'disabled'));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => true], ['disabled' => 'disabled']);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->isDisabled(), '->isDisabled() returns true for selects with a disabled attribute');
@@ -130,27 +130,27 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testMultipleSelects()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false), array('multiple' => 'multiple'));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false], ['multiple' => 'multiple']);
         $field = new ChoiceFormField($node);
 
-        $this->assertEquals(array(), $field->getValue(), '->setValue() returns an empty array if multiple is true and no option is selected');
+        $this->assertEquals([], $field->getValue(), '->setValue() returns an empty array if multiple is true and no option is selected');
 
         $field->setValue('foo');
-        $this->assertEquals(array('foo'), $field->getValue(), '->setValue() returns an array of options if multiple is true');
+        $this->assertEquals(['foo'], $field->getValue(), '->setValue() returns an array of options if multiple is true');
 
         $field->setValue('bar');
-        $this->assertEquals(array('bar'), $field->getValue(), '->setValue() returns an array of options if multiple is true');
+        $this->assertEquals(['bar'], $field->getValue(), '->setValue() returns an array of options if multiple is true');
 
-        $field->setValue(array('foo', 'bar'));
-        $this->assertEquals(array('foo', 'bar'), $field->getValue(), '->setValue() returns an array of options if multiple is true');
+        $field->setValue(['foo', 'bar']);
+        $this->assertEquals(['foo', 'bar'], $field->getValue(), '->setValue() returns an array of options if multiple is true');
 
-        $node = $this->createSelectNode(array('foo' => true, 'bar' => true), array('multiple' => 'multiple'));
+        $node = $this->createSelectNode(['foo' => true, 'bar' => true], ['multiple' => 'multiple']);
         $field = new ChoiceFormField($node);
 
-        $this->assertEquals(array('foo', 'bar'), $field->getValue(), '->getValue() returns the selected options');
+        $this->assertEquals(['foo', 'bar'], $field->getValue(), '->getValue() returns the selected options');
 
         try {
-            $field->setValue(array('foobar'));
+            $field->setValue(['foobar']);
             $this->fail('->setValue() throws an \InvalidArgumentException if the value is not one of the options');
         } catch (\InvalidArgumentException $e) {
             $this->assertTrue(true, '->setValue() throws an \InvalidArgumentException if the value is not one of the options');
@@ -159,18 +159,18 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testRadioButtons()
     {
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'bar'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'bar']);
         $field->addChoice($node);
 
         $this->assertFalse($field->hasValue(), '->hasValue() returns false when no radio button is selected');
         $this->assertNull($field->getValue(), '->getValue() returns null if no radio button is selected');
         $this->assertFalse($field->isMultiple(), '->isMultiple() returns false for radio buttons');
 
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'bar', 'checked' => 'checked'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'bar', 'checked' => 'checked']);
         $field->addChoice($node);
 
         $this->assertTrue($field->hasValue(), '->hasValue() returns true when a radio button is selected');
@@ -189,9 +189,9 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testRadioButtonsWithEmptyBooleanAttribute()
     {
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'bar', 'checked' => ''));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'bar', 'checked' => '']);
         $field->addChoice($node);
 
         $this->assertTrue($field->hasValue(), '->hasValue() returns true when a radio button is selected');
@@ -200,11 +200,11 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testRadioButtonIsDisabled()
     {
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'foo', 'disabled' => 'disabled'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'foo', 'disabled' => 'disabled']);
         $field = new ChoiceFormField($node);
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'bar'));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'bar']);
         $field->addChoice($node);
-        $node = $this->createNode('input', '', array('type' => 'radio', 'name' => 'name', 'value' => 'baz', 'disabled' => ''));
+        $node = $this->createNode('input', '', ['type' => 'radio', 'name' => 'name', 'value' => 'baz', 'disabled' => '']);
         $field->addChoice($node);
 
         $field->select('foo');
@@ -222,7 +222,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testCheckboxes()
     {
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name']);
         $field = new ChoiceFormField($node);
 
         $this->assertFalse($field->hasValue(), '->hasValue() returns false when the checkbox is not checked');
@@ -235,18 +235,18 @@ class ChoiceFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->initialize() throws a \LogicException for checkboxes');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'checked' => 'checked'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'checked' => 'checked']);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->hasValue(), '->hasValue() returns true when the checkbox is checked');
         $this->assertEquals('on', $field->getValue(), '->getValue() returns 1 if the checkbox is checked and has no value attribute');
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'checked' => 'checked', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'checked' => 'checked', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $this->assertEquals('foo', $field->getValue(), '->getValue() returns the value attribute if the checkbox is checked');
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'checked' => 'checked', 'value' => 'foo'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'checked' => 'checked', 'value' => 'foo']);
         $field = new ChoiceFormField($node);
 
         $field->setValue(false);
@@ -265,7 +265,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testCheckboxWithEmptyBooleanAttribute()
     {
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'value' => 'foo', 'checked' => ''));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'value' => 'foo', 'checked' => '']);
         $field = new ChoiceFormField($node);
 
         $this->assertTrue($field->hasValue(), '->hasValue() returns true when the checkbox is checked');
@@ -274,7 +274,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testTick()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
 
         try {
@@ -284,7 +284,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->tick() throws a \LogicException for select boxes');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name']);
         $field = new ChoiceFormField($node);
         $field->tick();
         $this->assertEquals('on', $field->getValue(), '->tick() ticks checkboxes');
@@ -292,7 +292,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testUntick()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
 
         try {
@@ -302,7 +302,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->untick() throws a \LogicException for select boxes');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'checked' => 'checked'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'checked' => 'checked']);
         $field = new ChoiceFormField($node);
         $field->untick();
         $this->assertNull($field->getValue(), '->untick() unticks checkboxes');
@@ -310,14 +310,14 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testSelect()
     {
-        $node = $this->createNode('input', '', array('type' => 'checkbox', 'name' => 'name', 'checked' => 'checked'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox', 'name' => 'name', 'checked' => 'checked']);
         $field = new ChoiceFormField($node);
         $field->select(true);
         $this->assertEquals('on', $field->getValue(), '->select() changes the value of the field');
         $field->select(false);
         $this->assertNull($field->getValue(), '->select() changes the value of the field');
 
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
         $field->select('foo');
         $this->assertEquals('foo', $field->getValue(), '->select() changes the selected option');
@@ -325,11 +325,11 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testOptionWithNoValue()
     {
-        $node = $this->createSelectNodeWithEmptyOption(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNodeWithEmptyOption(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
         $this->assertEquals('foo', $field->getValue());
 
-        $node = $this->createSelectNodeWithEmptyOption(array('foo' => false, 'bar' => true));
+        $node = $this->createSelectNodeWithEmptyOption(['foo' => false, 'bar' => true]);
         $field = new ChoiceFormField($node);
         $this->assertEquals('bar', $field->getValue());
         $field->select('foo');
@@ -338,28 +338,28 @@ class ChoiceFormFieldTest extends FormFieldTestCase
 
     public function testDisableValidation()
     {
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false]);
         $field = new ChoiceFormField($node);
         $field->disableValidation();
         $field->setValue('foobar');
         $this->assertEquals('foobar', $field->getValue(), '->disableValidation() allows to set a value which is not in the selected options.');
 
-        $node = $this->createSelectNode(array('foo' => false, 'bar' => false), array('multiple' => 'multiple'));
+        $node = $this->createSelectNode(['foo' => false, 'bar' => false], ['multiple' => 'multiple']);
         $field = new ChoiceFormField($node);
         $field->disableValidation();
-        $field->setValue(array('foobar'));
-        $this->assertEquals(array('foobar'), $field->getValue(), '->disableValidation() allows to set a value which is not in the selected options.');
+        $field->setValue(['foobar']);
+        $this->assertEquals(['foobar'], $field->getValue(), '->disableValidation() allows to set a value which is not in the selected options.');
     }
 
     public function testSelectWithEmptyValue()
     {
-        $node = $this->createSelectNodeWithEmptyOption(array('' => true, 'Female' => false, 'Male' => false));
+        $node = $this->createSelectNodeWithEmptyOption(['' => true, 'Female' => false, 'Male' => false]);
         $field = new ChoiceFormField($node);
 
         $this->assertSame('', $field->getValue());
     }
 
-    protected function createSelectNode($options, $attributes = array(), $selectedAttrText = 'selected')
+    protected function createSelectNode($options, $attributes = [], $selectedAttrText = 'selected')
     {
         $document = new \DOMDocument();
         $node = $document->createElement('select');
@@ -381,7 +381,7 @@ class ChoiceFormFieldTest extends FormFieldTestCase
         return $node;
     }
 
-    protected function createSelectNodeWithEmptyOption($options, $attributes = array())
+    protected function createSelectNodeWithEmptyOption($options, $attributes = [])
     {
         $document = new \DOMDocument();
         $node = $document->createElement('select');
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php b/src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php
index 3ce49a46ef..03ab383cbb 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/FileFormFieldTest.php
@@ -17,10 +17,10 @@ class FileFormFieldTest extends FormFieldTestCase
 {
     public function testInitialize()
     {
-        $node = $this->createNode('input', '', array('type' => 'file'));
+        $node = $this->createNode('input', '', ['type' => 'file']);
         $field = new FileFormField($node);
 
-        $this->assertEquals(array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => UPLOAD_ERR_NO_FILE, 'size' => 0), $field->getValue(), '->initialize() sets the value of the field to no file uploaded');
+        $this->assertEquals(['name' => '', 'type' => '', 'tmp_name' => '', 'error' => UPLOAD_ERR_NO_FILE, 'size' => 0], $field->getValue(), '->initialize() sets the value of the field to no file uploaded');
 
         $node = $this->createNode('textarea', '');
         try {
@@ -30,7 +30,7 @@ class FileFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->initialize() throws a \LogicException if the node is not an input field');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'text'));
+        $node = $this->createNode('input', '', ['type' => 'text']);
         try {
             $field = new FileFormField($node);
             $this->fail('->initialize() throws a \LogicException if the node is not a file input field');
@@ -44,11 +44,11 @@ class FileFormFieldTest extends FormFieldTestCase
      */
     public function testSetValue($method)
     {
-        $node = $this->createNode('input', '', array('type' => 'file'));
+        $node = $this->createNode('input', '', ['type' => 'file']);
         $field = new FileFormField($node);
 
         $field->$method(null);
-        $this->assertEquals(array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => UPLOAD_ERR_NO_FILE, 'size' => 0), $field->getValue(), "->$method() clears the uploaded file if the value is null");
+        $this->assertEquals(['name' => '', 'type' => '', 'tmp_name' => '', 'error' => UPLOAD_ERR_NO_FILE, 'size' => 0], $field->getValue(), "->$method() clears the uploaded file if the value is null");
 
         $field->$method(__FILE__);
         $value = $field->getValue();
@@ -80,15 +80,15 @@ class FileFormFieldTest extends FormFieldTestCase
 
     public function getSetValueMethods()
     {
-        return array(
-            array('setValue'),
-            array('upload'),
-        );
+        return [
+            ['setValue'],
+            ['upload'],
+        ];
     }
 
     public function testSetErrorCode()
     {
-        $node = $this->createNode('input', '', array('type' => 'file'));
+        $node = $this->createNode('input', '', ['type' => 'file']);
         $field = new FileFormField($node);
 
         $field->setErrorCode(UPLOAD_ERR_FORM_SIZE);
@@ -105,7 +105,7 @@ class FileFormFieldTest extends FormFieldTestCase
 
     public function testSetRawFilePath()
     {
-        $node = $this->createNode('input', '', array('type' => 'file'));
+        $node = $this->createNode('input', '', ['type' => 'file']);
         $field = new FileFormField($node);
         $field->setFilePath(__FILE__);
 
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTest.php b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTest.php
index d150eb3ac7..e2daa03987 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTest.php
@@ -17,7 +17,7 @@ class FormFieldTest extends FormFieldTestCase
 {
     public function testGetName()
     {
-        $node = $this->createNode('input', '', array('type' => 'text', 'name' => 'name', 'value' => 'value'));
+        $node = $this->createNode('input', '', ['type' => 'text', 'name' => 'name', 'value' => 'value']);
         $field = new InputFormField($node);
 
         $this->assertEquals('name', $field->getName(), '->getName() returns the name of the field');
@@ -25,7 +25,7 @@ class FormFieldTest extends FormFieldTestCase
 
     public function testGetSetHasValue()
     {
-        $node = $this->createNode('input', '', array('type' => 'text', 'name' => 'name', 'value' => 'value'));
+        $node = $this->createNode('input', '', ['type' => 'text', 'name' => 'name', 'value' => 'value']);
         $field = new InputFormField($node);
 
         $this->assertEquals('value', $field->getValue(), '->getValue() returns the value of the field');
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
index 2059d049c1..5ca19d9541 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/FormFieldTestCase.php
@@ -15,7 +15,7 @@ use PHPUnit\Framework\TestCase;
 
 class FormFieldTestCase extends TestCase
 {
-    protected function createNode($tag, $value, $attributes = array())
+    protected function createNode($tag, $value, $attributes = [])
     {
         $document = new \DOMDocument();
         $node = $document->createElement($tag, $value);
diff --git a/src/Symfony/Component/DomCrawler/Tests/Field/InputFormFieldTest.php b/src/Symfony/Component/DomCrawler/Tests/Field/InputFormFieldTest.php
index 193d301de6..5758f1b7bb 100644
--- a/src/Symfony/Component/DomCrawler/Tests/Field/InputFormFieldTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/Field/InputFormFieldTest.php
@@ -17,7 +17,7 @@ class InputFormFieldTest extends FormFieldTestCase
 {
     public function testInitialize()
     {
-        $node = $this->createNode('input', '', array('type' => 'text', 'name' => 'name', 'value' => 'value'));
+        $node = $this->createNode('input', '', ['type' => 'text', 'name' => 'name', 'value' => 'value']);
         $field = new InputFormField($node);
 
         $this->assertEquals('value', $field->getValue(), '->initialize() sets the value of the field to the value attribute value');
@@ -30,7 +30,7 @@ class InputFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->initialize() throws a \LogicException if the node is not an input');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'checkbox'));
+        $node = $this->createNode('input', '', ['type' => 'checkbox']);
         try {
             $field = new InputFormField($node);
             $this->fail('->initialize() throws a \LogicException if the node is a checkbox');
@@ -38,7 +38,7 @@ class InputFormFieldTest extends FormFieldTestCase
             $this->assertTrue(true, '->initialize() throws a \LogicException if the node is a checkbox');
         }
 
-        $node = $this->createNode('input', '', array('type' => 'file'));
+        $node = $this->createNode('input', '', ['type' => 'file']);
         try {
             $field = new InputFormField($node);
             $this->fail('->initialize() throws a \LogicException if the node is a file');
diff --git a/src/Symfony/Component/DomCrawler/Tests/FormTest.php b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
index f7ea51b2d0..2778fd075e 100644
--- a/src/Symfony/Component/DomCrawler/Tests/FormTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/FormTest.php
@@ -129,18 +129,18 @@ class FormTest extends TestCase
         $form2 = new Form($buttonElements->item(0), 'http://example.com');
 
         // Tests if form values are correctly assigned to forms
-        $values1 = array(
-            'apples' => array('1', '2'),
+        $values1 = [
+            'apples' => ['1', '2'],
             'form_name' => 'form-1',
             'button_1' => 'Capture fields',
             'outer_field' => 'success',
-        );
-        $values2 = array(
-            'oranges' => array('1', '2', '3'),
+        ];
+        $values2 = [
+            'oranges' => ['1', '2', '3'],
             'form_name' => 'form_2',
             'button_2' => '',
-            'app_frontend_form_type_contact_form_type' => array('contactType' => '', 'firstName' => 'John'),
-        );
+            'app_frontend_form_type_contact_form_type' => ['contactType' => '', 'firstName' => 'John'],
+        ];
 
         $this->assertEquals($values1, $form1->getPhpValues(), 'HTML5-compliant form attribute handled incorrectly');
         $this->assertEquals($values2, $form2->getPhpValues(), 'HTML5-compliant form attribute handled incorrectly');
@@ -161,7 +161,7 @@ class FormTest extends TestCase
 
         $this->assertEquals(
             array_keys($form->all()),
-            array('foo[2]', 'foo[3]', 'bar[foo][0]', 'bar[foo][foobar]')
+            ['foo[2]', 'foo[3]', 'bar[foo][0]', 'bar[foo][foobar]']
         );
 
         $this->assertEquals($form->get('foo[2]')->getValue(), 'foo');
@@ -175,7 +175,7 @@ class FormTest extends TestCase
         $this->assertEquals($form->get('foo[2]')->getValue(), 'bar');
         $this->assertEquals($form->get('foo[3]')->getValue(), 'bar');
 
-        $form['bar'] = array('foo' => array('0' => 'bar', 'foobar' => 'foobar'));
+        $form['bar'] = ['foo' => ['0' => 'bar', 'foobar' => 'foobar']];
 
         $this->assertEquals($form->get('bar[foo][0]')->getValue(), 'bar');
         $this->assertEquals($form->get('bar[foo][foobar]')->getValue(), 'foobar');
@@ -193,7 +193,7 @@ class FormTest extends TestCase
                 function ($field) {
                     $class = \get_class($field);
 
-                    return array(substr($class, strrpos($class, '\\') + 1), $field->getValue());
+                    return [substr($class, strrpos($class, '\\') + 1), $field->getValue()];
                 },
                 $form->all()
             ),
@@ -203,84 +203,84 @@ class FormTest extends TestCase
 
     public function provideInitializeValues()
     {
-        return array(
-            array(
+        return [
+            [
                 'does not take into account input fields without a name attribute',
                 '<input type="text" value="foo" />
                  <input type="submit" />',
-                array(),
-            ),
-            array(
+                [],
+            ],
+            [
                 'does not take into account input fields with an empty name attribute value',
                 '<input type="text" name="" value="foo" />
                  <input type="submit" />',
-                array(),
-            ),
-            array(
+                [],
+            ],
+            [
                 'takes into account disabled input fields',
                 '<input type="text" name="foo" value="foo" disabled="disabled" />
                  <input type="submit" />',
-                array('foo' => array('InputFormField', 'foo')),
-            ),
-            array(
+                ['foo' => ['InputFormField', 'foo']],
+            ],
+            [
                 'appends the submitted button value',
                 '<input type="submit" name="bar" value="bar" />',
-                array('bar' => array('InputFormField', 'bar')),
-            ),
-            array(
+                ['bar' => ['InputFormField', 'bar']],
+            ],
+            [
                 'appends the submitted button value for Button element',
                 '<button type="submit" name="bar" value="bar">Bar</button>',
-                array('bar' => array('InputFormField', 'bar')),
-            ),
-            array(
+                ['bar' => ['InputFormField', 'bar']],
+            ],
+            [
                 'appends the submitted button value but not other submit buttons',
                 '<input type="submit" name="bar" value="bar" />
                  <input type="submit" name="foobar" value="foobar" />',
-                 array('foobar' => array('InputFormField', 'foobar')),
-            ),
-            array(
+                 ['foobar' => ['InputFormField', 'foobar']],
+            ],
+            [
                 'turns an image input into x and y fields',
                 '<input type="image" name="bar" />',
-                array('bar.x' => array('InputFormField', '0'), 'bar.y' => array('InputFormField', '0')),
-            ),
-            array(
+                ['bar.x' => ['InputFormField', '0'], 'bar.y' => ['InputFormField', '0']],
+            ],
+            [
                 'returns textareas',
                 '<textarea name="foo">foo</textarea>
                  <input type="submit" />',
-                 array('foo' => array('TextareaFormField', 'foo')),
-            ),
-            array(
+                 ['foo' => ['TextareaFormField', 'foo']],
+            ],
+            [
                 'returns inputs',
                 '<input type="text" name="foo" value="foo" />
                  <input type="submit" />',
-                 array('foo' => array('InputFormField', 'foo')),
-            ),
-            array(
+                 ['foo' => ['InputFormField', 'foo']],
+            ],
+            [
                 'returns checkboxes',
                 '<input type="checkbox" name="foo" value="foo" checked="checked" />
                  <input type="submit" />',
-                 array('foo' => array('ChoiceFormField', 'foo')),
-            ),
-            array(
+                 ['foo' => ['ChoiceFormField', 'foo']],
+            ],
+            [
                 'returns not-checked checkboxes',
                 '<input type="checkbox" name="foo" value="foo" />
                  <input type="submit" />',
-                 array('foo' => array('ChoiceFormField', false)),
-            ),
-            array(
+                 ['foo' => ['ChoiceFormField', false]],
+            ],
+            [
                 'returns radio buttons',
                 '<input type="radio" name="foo" value="foo" />
                  <input type="radio" name="foo" value="bar" checked="bar" />
                  <input type="submit" />',
-                 array('foo' => array('ChoiceFormField', 'bar')),
-            ),
-            array(
+                 ['foo' => ['ChoiceFormField', 'bar']],
+            ],
+            [
                 'returns file inputs',
                 '<input type="file" name="foo" />
                  <input type="submit" />',
-                 array('foo' => array('FileFormField', array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0))),
-            ),
-        );
+                 ['foo' => ['FileFormField', ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]]],
+            ],
+        ];
     }
 
     public function testGetFormNode()
@@ -390,86 +390,86 @@ class FormTest extends TestCase
     public function testGetValues()
     {
         $form = $this->createForm('<form><input type="text" name="foo[bar]" value="foo" /><input type="text" name="bar" value="bar" /><select multiple="multiple" name="baz[]"></select><input type="submit" /></form>');
-        $this->assertEquals(array('foo[bar]' => 'foo', 'bar' => 'bar', 'baz' => array()), $form->getValues(), '->getValues() returns all form field values');
+        $this->assertEquals(['foo[bar]' => 'foo', 'bar' => 'bar', 'baz' => []], $form->getValues(), '->getValues() returns all form field values');
 
         $form = $this->createForm('<form><input type="checkbox" name="foo" value="foo" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('bar' => 'bar'), $form->getValues(), '->getValues() does not include not-checked checkboxes');
+        $this->assertEquals(['bar' => 'bar'], $form->getValues(), '->getValues() does not include not-checked checkboxes');
 
         $form = $this->createForm('<form><input type="file" name="foo" value="foo" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('bar' => 'bar'), $form->getValues(), '->getValues() does not include file input fields');
+        $this->assertEquals(['bar' => 'bar'], $form->getValues(), '->getValues() does not include file input fields');
 
         $form = $this->createForm('<form><input type="text" name="foo" value="foo" disabled="disabled" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('bar' => 'bar'), $form->getValues(), '->getValues() does not include disabled fields');
+        $this->assertEquals(['bar' => 'bar'], $form->getValues(), '->getValues() does not include disabled fields');
 
         $form = $this->createForm('<form><template><input type="text" name="foo" value="foo" /></template><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('bar' => 'bar'), $form->getValues(), '->getValues() does not include template fields');
+        $this->assertEquals(['bar' => 'bar'], $form->getValues(), '->getValues() does not include template fields');
         $this->assertFalse($form->has('foo'));
     }
 
     public function testSetValues()
     {
         $form = $this->createForm('<form><input type="checkbox" name="foo" value="foo" checked="checked" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $form->setValues(array('foo' => false, 'bar' => 'foo'));
-        $this->assertEquals(array('bar' => 'foo'), $form->getValues(), '->setValues() sets the values of fields');
+        $form->setValues(['foo' => false, 'bar' => 'foo']);
+        $this->assertEquals(['bar' => 'foo'], $form->getValues(), '->setValues() sets the values of fields');
     }
 
     public function testMultiselectSetValues()
     {
         $form = $this->createForm('<form><select multiple="multiple" name="multi"><option value="foo">foo</option><option value="bar">bar</option></select><input type="submit" /></form>');
-        $form->setValues(array('multi' => array('foo', 'bar')));
-        $this->assertEquals(array('multi' => array('foo', 'bar')), $form->getValues(), '->setValue() sets the values of select');
+        $form->setValues(['multi' => ['foo', 'bar']]);
+        $this->assertEquals(['multi' => ['foo', 'bar']], $form->getValues(), '->setValue() sets the values of select');
     }
 
     public function testGetPhpValues()
     {
         $form = $this->createForm('<form><input type="text" name="foo[bar]" value="foo" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('foo' => array('bar' => 'foo'), 'bar' => 'bar'), $form->getPhpValues(), '->getPhpValues() converts keys with [] to arrays');
+        $this->assertEquals(['foo' => ['bar' => 'foo'], 'bar' => 'bar'], $form->getPhpValues(), '->getPhpValues() converts keys with [] to arrays');
 
         $form = $this->createForm('<form><input type="text" name="fo.o[ba.r]" value="foo" /><input type="text" name="ba r" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('fo.o' => array('ba.r' => 'foo'), 'ba r' => 'bar'), $form->getPhpValues(), '->getPhpValues() preserves periods and spaces in names');
+        $this->assertEquals(['fo.o' => ['ba.r' => 'foo'], 'ba r' => 'bar'], $form->getPhpValues(), '->getPhpValues() preserves periods and spaces in names');
 
         $form = $this->createForm('<form><input type="text" name="fo.o[ba.r][]" value="foo" /><input type="text" name="fo.o[ba.r][ba.z]" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('fo.o' => array('ba.r' => array('foo', 'ba.z' => 'bar'))), $form->getPhpValues(), '->getPhpValues() preserves periods and spaces in names recursively');
+        $this->assertEquals(['fo.o' => ['ba.r' => ['foo', 'ba.z' => 'bar']]], $form->getPhpValues(), '->getPhpValues() preserves periods and spaces in names recursively');
 
         $form = $this->createForm('<form><input type="text" name="foo[bar]" value="foo" /><input type="text" name="bar" value="bar" /><select multiple="multiple" name="baz[]"></select><input type="submit" /></form>');
-        $this->assertEquals(array('foo' => array('bar' => 'foo'), 'bar' => 'bar'), $form->getPhpValues(), "->getPhpValues() doesn't return empty values");
+        $this->assertEquals(['foo' => ['bar' => 'foo'], 'bar' => 'bar'], $form->getPhpValues(), "->getPhpValues() doesn't return empty values");
     }
 
     public function testGetFiles()
     {
         $form = $this->createForm('<form><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array(), $form->getFiles(), '->getFiles() returns an empty array if method is get');
+        $this->assertEquals([], $form->getFiles(), '->getFiles() returns an empty array if method is get');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('foo[bar]' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0)), $form->getFiles(), '->getFiles() only returns file fields for POST');
+        $this->assertEquals(['foo[bar]' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]], $form->getFiles(), '->getFiles() only returns file fields for POST');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>', 'put');
-        $this->assertEquals(array('foo[bar]' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0)), $form->getFiles(), '->getFiles() only returns file fields for PUT');
+        $this->assertEquals(['foo[bar]' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]], $form->getFiles(), '->getFiles() only returns file fields for PUT');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>', 'delete');
-        $this->assertEquals(array('foo[bar]' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0)), $form->getFiles(), '->getFiles() only returns file fields for DELETE');
+        $this->assertEquals(['foo[bar]' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]], $form->getFiles(), '->getFiles() only returns file fields for DELETE');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>', 'patch');
-        $this->assertEquals(array('foo[bar]' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0)), $form->getFiles(), '->getFiles() only returns file fields for PATCH');
+        $this->assertEquals(['foo[bar]' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]], $form->getFiles(), '->getFiles() only returns file fields for PATCH');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" disabled="disabled" /><input type="submit" /></form>');
-        $this->assertEquals(array(), $form->getFiles(), '->getFiles() does not include disabled file fields');
+        $this->assertEquals([], $form->getFiles(), '->getFiles() does not include disabled file fields');
 
         $form = $this->createForm('<form method="post"><template><input type="file" name="foo"/></template><input type="text" name="bar" value="bar"/><input type="submit"/></form>');
-        $this->assertEquals(array(), $form->getFiles(), '->getFiles() does not include template file fields');
+        $this->assertEquals([], $form->getFiles(), '->getFiles() does not include template file fields');
         $this->assertFalse($form->has('foo'));
     }
 
     public function testGetPhpFiles()
     {
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('foo' => array('bar' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0))), $form->getPhpFiles(), '->getPhpFiles() converts keys with [] to arrays');
+        $this->assertEquals(['foo' => ['bar' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]]], $form->getPhpFiles(), '->getPhpFiles() converts keys with [] to arrays');
 
         $form = $this->createForm('<form method="post"><input type="file" name="f.o o[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('f.o o' => array('bar' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0))), $form->getPhpFiles(), '->getPhpFiles() preserves periods and spaces in names');
+        $this->assertEquals(['f.o o' => ['bar' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]]], $form->getPhpFiles(), '->getPhpFiles() preserves periods and spaces in names');
 
         $form = $this->createForm('<form method="post"><input type="file" name="f.o o[bar][ba.z]" /><input type="file" name="f.o o[bar][]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
-        $this->assertEquals(array('f.o o' => array('bar' => array('ba.z' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0), array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0)))), $form->getPhpFiles(), '->getPhpFiles() preserves periods and spaces in names recursively');
+        $this->assertEquals(['f.o o' => ['bar' => ['ba.z' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0], ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]]]], $form->getPhpFiles(), '->getPhpFiles() preserves periods and spaces in names recursively');
 
         $form = $this->createForm('<form method="post"><input type="file" name="foo[bar]" /><input type="text" name="bar" value="bar" /><input type="submit" /></form>');
         $files = $form->getPhpFiles();
@@ -478,7 +478,7 @@ class FormTest extends TestCase
         $this->assertSame(4, $files['foo']['bar']['error'], '->getPhpFiles() converts error to int');
 
         $form = $this->createForm('<form method="post"><input type="file" name="size[error]" /><input type="text" name="error" value="error" /><input type="submit" /></form>');
-        $this->assertEquals(array('size' => array('error' => array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0))), $form->getPhpFiles(), '->getPhpFiles() int conversion does not collide with file names');
+        $this->assertEquals(['size' => ['error' => ['name' => '', 'type' => '', 'tmp_name' => '', 'error' => 4, 'size' => 0]]], $form->getPhpFiles(), '->getPhpFiles() int conversion does not collide with file names');
     }
 
     /**
@@ -559,83 +559,83 @@ class FormTest extends TestCase
 
     public function provideGetUriValues()
     {
-        return array(
-            array(
+        return [
+            [
                 'returns the URI of the form',
                 '<form action="/foo"><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo',
-            ),
-            array(
+            ],
+            [
                 'appends the form values if the method is get',
                 '<form action="/foo"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo?foo=foo',
-            ),
-            array(
+            ],
+            [
                 'appends the form values and merges the submitted values',
                 '<form action="/foo"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array('foo' => 'bar'),
+                ['foo' => 'bar'],
                 '/foo?foo=bar',
-            ),
-            array(
+            ],
+            [
                 'does not append values if the method is post',
                 '<form action="/foo" method="post"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo',
-            ),
-            array(
+            ],
+            [
                 'does not append values if the method is patch',
                 '<form action="/foo" method="post"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo',
                 'PUT',
-            ),
-            array(
+            ],
+            [
                 'does not append values if the method is delete',
                 '<form action="/foo" method="post"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo',
                 'DELETE',
-            ),
-            array(
+            ],
+            [
                 'does not append values if the method is put',
                 '<form action="/foo" method="post"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo',
                 'PATCH',
-            ),
-            array(
+            ],
+            [
                 'appends the form values to an existing query string',
                 '<form action="/foo?bar=bar"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo?bar=bar&foo=foo',
-            ),
-            array(
+            ],
+            [
                 'replaces query values with the form values',
                 '<form action="/foo?bar=bar"><input type="text" name="bar" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/foo?bar=foo',
-            ),
-            array(
+            ],
+            [
                 'returns an empty URI if the action is empty',
                 '<form><input type="submit" /></form>',
-                array(),
+                [],
                 '/',
-            ),
-            array(
+            ],
+            [
                 'appends the form values even if the action is empty',
                 '<form><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/?foo=foo',
-            ),
-            array(
+            ],
+            [
                 'chooses the path if the action attribute value is a sharp (#)',
                 '<form action="#" method="post"><input type="text" name="foo" value="foo" /><input type="submit" /></form>',
-                array(),
+                [],
                 '/#',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testHas()
@@ -761,7 +761,7 @@ class FormTest extends TestCase
         $registry->add($this->getFormFieldMock('bar[baz]'));
 
         $this->assertEquals(
-            array('foo[0]', 'foo[1]', 'bar[5]', 'bar[6]', 'bar[baz]'),
+            ['foo[0]', 'foo[1]', 'bar[5]', 'bar[6]', 'bar[baz]'],
             array_keys($registry->all())
         );
     }
@@ -795,13 +795,13 @@ class FormTest extends TestCase
         $registry->set('foo[3]', 3);
         $registry->set('foo[bar][baz]', 'fbb');
 
-        $registry->set('foo', array(
+        $registry->set('foo', [
             2 => 2,
             3 => 3,
-            'bar' => array(
+            'bar' => [
                 'baz' => 'fbb',
-             ),
-        ));
+             ],
+        ]);
     }
 
     /**
@@ -825,7 +825,7 @@ class FormTest extends TestCase
         $registry = new FormFieldRegistry();
         $registry->add($this->getFormFieldMock('bar'));
 
-        $registry->set('bar', array('baz'));
+        $registry->set('bar', ['baz']);
     }
 
     public function testDifferentFieldTypesWithSameName()
@@ -854,7 +854,7 @@ class FormTest extends TestCase
     {
         $field = $this
             ->getMockBuilder('Symfony\\Component\\DomCrawler\\Field\\FormField')
-            ->setMethods(array('getName', 'getValue', 'setValue', 'initialize'))
+            ->setMethods(['getName', 'getValue', 'setValue', 'initialize'])
             ->disableOriginalConstructor()
             ->getMock()
         ;
@@ -965,6 +965,6 @@ class FormTest extends TestCase
 
         $nodes = $dom->getElementsByTagName('form');
         $form = new Form($nodes->item(0), 'http://example.com');
-        $this->assertEquals($form->getPhpValues(), array('example' => ''));
+        $this->assertEquals($form->getPhpValues(), ['example' => '']);
     }
 }
diff --git a/src/Symfony/Component/DomCrawler/Tests/ImageTest.php b/src/Symfony/Component/DomCrawler/Tests/ImageTest.php
index 5cac757cdf..6aecadbc14 100644
--- a/src/Symfony/Component/DomCrawler/Tests/ImageTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/ImageTest.php
@@ -62,9 +62,9 @@ class ImageTest extends TestCase
 
     public function getGetUriTests()
     {
-        return array(
-            array('/foo.png', 'http://localhost/bar/foo/', 'http://localhost/foo.png'),
-            array('foo.png', 'http://localhost/bar/foo/', 'http://localhost/bar/foo/foo.png'),
-        );
+        return [
+            ['/foo.png', 'http://localhost/bar/foo/', 'http://localhost/foo.png'],
+            ['foo.png', 'http://localhost/bar/foo/', 'http://localhost/bar/foo/foo.png'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/DomCrawler/Tests/LinkTest.php b/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
index f485cc2ac1..76805bb764 100644
--- a/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/LinkTest.php
@@ -111,61 +111,61 @@ class LinkTest extends TestCase
 
     public function getGetUriTests()
     {
-        return array(
-            array('/foo', 'http://localhost/bar/foo/', 'http://localhost/foo'),
-            array('/foo', 'http://localhost/bar/foo', 'http://localhost/foo'),
-            array('
-            /foo', 'http://localhost/bar/foo/', 'http://localhost/foo'),
-            array('/foo
-            ', 'http://localhost/bar/foo', 'http://localhost/foo'),
+        return [
+            ['/foo', 'http://localhost/bar/foo/', 'http://localhost/foo'],
+            ['/foo', 'http://localhost/bar/foo', 'http://localhost/foo'],
+            ['
+            /foo', 'http://localhost/bar/foo/', 'http://localhost/foo'],
+            ['/foo
+            ', 'http://localhost/bar/foo', 'http://localhost/foo'],
 
-            array('foo', 'http://localhost/bar/foo/', 'http://localhost/bar/foo/foo'),
-            array('foo', 'http://localhost/bar/foo', 'http://localhost/bar/foo'),
+            ['foo', 'http://localhost/bar/foo/', 'http://localhost/bar/foo/foo'],
+            ['foo', 'http://localhost/bar/foo', 'http://localhost/bar/foo'],
 
-            array('', 'http://localhost/bar/', 'http://localhost/bar/'),
-            array('#', 'http://localhost/bar/', 'http://localhost/bar/#'),
-            array('#bar', 'http://localhost/bar?a=b', 'http://localhost/bar?a=b#bar'),
-            array('#bar', 'http://localhost/bar/#foo', 'http://localhost/bar/#bar'),
-            array('?a=b', 'http://localhost/bar#foo', 'http://localhost/bar?a=b'),
-            array('?a=b', 'http://localhost/bar/', 'http://localhost/bar/?a=b'),
+            ['', 'http://localhost/bar/', 'http://localhost/bar/'],
+            ['#', 'http://localhost/bar/', 'http://localhost/bar/#'],
+            ['#bar', 'http://localhost/bar?a=b', 'http://localhost/bar?a=b#bar'],
+            ['#bar', 'http://localhost/bar/#foo', 'http://localhost/bar/#bar'],
+            ['?a=b', 'http://localhost/bar#foo', 'http://localhost/bar?a=b'],
+            ['?a=b', 'http://localhost/bar/', 'http://localhost/bar/?a=b'],
 
-            array('http://login.foo.com/foo', 'http://localhost/bar/', 'http://login.foo.com/foo'),
-            array('https://login.foo.com/foo', 'https://localhost/bar/', 'https://login.foo.com/foo'),
-            array('mailto:foo@bar.com', 'http://localhost/foo', 'mailto:foo@bar.com'),
+            ['http://login.foo.com/foo', 'http://localhost/bar/', 'http://login.foo.com/foo'],
+            ['https://login.foo.com/foo', 'https://localhost/bar/', 'https://login.foo.com/foo'],
+            ['mailto:foo@bar.com', 'http://localhost/foo', 'mailto:foo@bar.com'],
 
             // tests schema relative URL (issue #7169)
-            array('//login.foo.com/foo', 'http://localhost/bar/', 'http://login.foo.com/foo'),
-            array('//login.foo.com/foo', 'https://localhost/bar/', 'https://login.foo.com/foo'),
+            ['//login.foo.com/foo', 'http://localhost/bar/', 'http://login.foo.com/foo'],
+            ['//login.foo.com/foo', 'https://localhost/bar/', 'https://login.foo.com/foo'],
 
-            array('?foo=2', 'http://localhost?foo=1', 'http://localhost?foo=2'),
-            array('?foo=2', 'http://localhost/?foo=1', 'http://localhost/?foo=2'),
-            array('?foo=2', 'http://localhost/bar?foo=1', 'http://localhost/bar?foo=2'),
-            array('?foo=2', 'http://localhost/bar/?foo=1', 'http://localhost/bar/?foo=2'),
-            array('?bar=2', 'http://localhost?foo=1', 'http://localhost?bar=2'),
+            ['?foo=2', 'http://localhost?foo=1', 'http://localhost?foo=2'],
+            ['?foo=2', 'http://localhost/?foo=1', 'http://localhost/?foo=2'],
+            ['?foo=2', 'http://localhost/bar?foo=1', 'http://localhost/bar?foo=2'],
+            ['?foo=2', 'http://localhost/bar/?foo=1', 'http://localhost/bar/?foo=2'],
+            ['?bar=2', 'http://localhost?foo=1', 'http://localhost?bar=2'],
 
-            array('foo', 'http://login.foo.com/bar/baz?/query/string', 'http://login.foo.com/bar/foo'),
+            ['foo', 'http://login.foo.com/bar/baz?/query/string', 'http://login.foo.com/bar/foo'],
 
-            array('.', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/'),
-            array('./', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/'),
-            array('./foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/foo'),
-            array('..', 'http://localhost/foo/bar/baz', 'http://localhost/foo/'),
-            array('../', 'http://localhost/foo/bar/baz', 'http://localhost/foo/'),
-            array('../foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo/foo'),
-            array('../..', 'http://localhost/foo/bar/baz', 'http://localhost/'),
-            array('../../', 'http://localhost/foo/bar/baz', 'http://localhost/'),
-            array('../../foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo'),
-            array('../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'),
-            array('../bar/../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'),
-            array('../bar/./../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'),
-            array('../../', 'http://localhost/', 'http://localhost/'),
-            array('../../', 'http://localhost', 'http://localhost/'),
+            ['.', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/'],
+            ['./', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/'],
+            ['./foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo/bar/foo'],
+            ['..', 'http://localhost/foo/bar/baz', 'http://localhost/foo/'],
+            ['../', 'http://localhost/foo/bar/baz', 'http://localhost/foo/'],
+            ['../foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo/foo'],
+            ['../..', 'http://localhost/foo/bar/baz', 'http://localhost/'],
+            ['../../', 'http://localhost/foo/bar/baz', 'http://localhost/'],
+            ['../../foo', 'http://localhost/foo/bar/baz', 'http://localhost/foo'],
+            ['../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'],
+            ['../bar/../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'],
+            ['../bar/./../../foo', 'http://localhost/bar/foo/', 'http://localhost/foo'],
+            ['../../', 'http://localhost/', 'http://localhost/'],
+            ['../../', 'http://localhost', 'http://localhost/'],
 
-            array('/foo', 'http://localhost?bar=1', 'http://localhost/foo'),
-            array('/foo', 'http://localhost#bar', 'http://localhost/foo'),
-            array('/foo', 'file:///', 'file:///foo'),
-            array('/foo', 'file:///bar/baz', 'file:///foo'),
-            array('foo', 'file:///', 'file:///foo'),
-            array('foo', 'file:///bar/baz', 'file:///bar/foo'),
-        );
+            ['/foo', 'http://localhost?bar=1', 'http://localhost/foo'],
+            ['/foo', 'http://localhost#bar', 'http://localhost/foo'],
+            ['/foo', 'file:///', 'file:///foo'],
+            ['/foo', 'file:///bar/baz', 'file:///foo'],
+            ['foo', 'file:///', 'file:///foo'],
+            ['foo', 'file:///bar/baz', 'file:///bar/foo'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Dotenv/Dotenv.php b/src/Symfony/Component/Dotenv/Dotenv.php
index 619cc8be8a..9833ad7811 100644
--- a/src/Symfony/Component/Dotenv/Dotenv.php
+++ b/src/Symfony/Component/Dotenv/Dotenv.php
@@ -65,7 +65,7 @@ final class Dotenv
      * @throws FormatException when a file has a syntax error
      * @throws PathException   when a file does not exist or is not readable
      */
-    public function loadEnv(string $path, string $varName = 'APP_ENV', string $defaultEnv = 'dev', array $testEnvs = array('test')): void
+    public function loadEnv(string $path, string $varName = 'APP_ENV', string $defaultEnv = 'dev', array $testEnvs = ['test']): void
     {
         if (file_exists($path) || !file_exists($p = "$path.dist")) {
             $this->load($path);
@@ -74,7 +74,7 @@ final class Dotenv
         }
 
         if (null === $env = $_SERVER[$varName] ?? $_ENV[$varName] ?? null) {
-            $this->populate(array($varName => $env = $defaultEnv));
+            $this->populate([$varName => $env = $defaultEnv]);
         }
 
         if (!\in_array($env, $testEnvs, true) && file_exists($p = "$path.local")) {
@@ -158,12 +158,12 @@ final class Dotenv
     public function parse(string $data, string $path = '.env'): array
     {
         $this->path = $path;
-        $this->data = str_replace(array("\r\n", "\r"), "\n", $data);
+        $this->data = str_replace(["\r\n", "\r"], "\n", $data);
         $this->lineno = 1;
         $this->cursor = 0;
         $this->end = \strlen($this->data);
         $this->state = self::STATE_VARNAME;
-        $this->values = array();
+        $this->values = [];
         $name = '';
 
         $this->skipEmptyLines();
@@ -189,7 +189,7 @@ final class Dotenv
         try {
             return $this->values;
         } finally {
-            $this->values = array();
+            $this->values = [];
             $this->data = null;
             $this->path = null;
         }
@@ -272,7 +272,7 @@ final class Dotenv
                     }
                 }
                 ++$this->cursor;
-                $value = str_replace(array('\\"', '\r', '\n'), array('"', "\r", "\n"), $value);
+                $value = str_replace(['\\"', '\r', '\n'], ['"', "\r", "\n"], $value);
                 $resolvedValue = $value;
                 $resolvedValue = $this->resolveVariables($resolvedValue);
                 $resolvedValue = $this->resolveCommands($resolvedValue);
@@ -281,7 +281,7 @@ final class Dotenv
             } else {
                 $value = '';
                 $prevChr = $this->data[$this->cursor - 1];
-                while ($this->cursor < $this->end && !\in_array($this->data[$this->cursor], array("\n", '"', "'"), true) && !((' ' === $prevChr || "\t" === $prevChr) && '#' === $this->data[$this->cursor])) {
+                while ($this->cursor < $this->end && !\in_array($this->data[$this->cursor], ["\n", '"', "'"], true) && !((' ' === $prevChr || "\t" === $prevChr) && '#' === $this->data[$this->cursor])) {
                     if ('\\' === $this->data[$this->cursor] && isset($this->data[$this->cursor + 1]) && ('"' === $this->data[$this->cursor + 1] || "'" === $this->data[$this->cursor + 1])) {
                         ++$this->cursor;
                     }
diff --git a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
index d421941fc2..513d87c7e8 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php
@@ -39,8 +39,8 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
         $this->dispatcher = $dispatcher;
         $this->stopwatch = $stopwatch;
         $this->logger = $logger;
-        $this->wrappedListeners = array();
-        $this->orphanedEvents = array();
+        $this->wrappedListeners = [];
+        $this->orphanedEvents = [];
     }
 
     /**
@@ -164,10 +164,10 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
     public function getCalledListeners()
     {
         if (null === $this->callStack) {
-            return array();
+            return [];
         }
 
-        $called = array();
+        $called = [];
         foreach ($this->callStack as $listener) {
             list($eventName) = $this->callStack->getInfo();
 
@@ -186,14 +186,14 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
             $allListeners = $this->getListeners();
         } catch (\Exception $e) {
             if (null !== $this->logger) {
-                $this->logger->info('An exception was thrown while getting the uncalled listeners.', array('exception' => $e));
+                $this->logger->info('An exception was thrown while getting the uncalled listeners.', ['exception' => $e]);
             }
 
             // unable to retrieve the uncalled listeners
-            return array();
+            return [];
         }
 
-        $notCalled = array();
+        $notCalled = [];
         foreach ($allListeners as $eventName => $listeners) {
             foreach ($listeners as $listener) {
                 $called = false;
@@ -216,7 +216,7 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
             }
         }
 
-        uasort($notCalled, array($this, 'sortNotCalledListeners'));
+        uasort($notCalled, [$this, 'sortNotCalledListeners']);
 
         return $notCalled;
     }
@@ -229,7 +229,7 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
     public function reset()
     {
         $this->callStack = null;
-        $this->orphanedEvents = array();
+        $this->orphanedEvents = [];
     }
 
     /**
@@ -279,7 +279,7 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
             $this->wrappedListeners[$eventName][] = $wrappedListener;
             $this->dispatcher->removeListener($eventName, $listener);
             $this->dispatcher->addListener($eventName, $wrappedListener, $priority);
-            $this->callStack->attach($wrappedListener, array($eventName));
+            $this->callStack->attach($wrappedListener, [$eventName]);
         }
     }
 
@@ -297,7 +297,7 @@ class TraceableEventDispatcher implements TraceableEventDispatcherInterface
             $this->dispatcher->addListener($eventName, $listener->getWrappedListener(), $priority);
 
             if (null !== $this->logger) {
-                $context = array('event' => $eventName, 'listener' => $listener->getPretty());
+                $context = ['event' => $eventName, 'listener' => $listener->getPretty()];
             }
 
             if ($listener->wasCalled()) {
diff --git a/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php b/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
index 36dd13d9bb..8b3f64a119 100644
--- a/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
+++ b/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php
@@ -96,12 +96,12 @@ class WrappedListener
             $this->stub = self::$hasClassStub ? new ClassStub($this->pretty.'()', $this->listener) : $this->pretty.'()';
         }
 
-        return array(
+        return [
             'event' => $eventName,
             'priority' => null !== $this->dispatcher ? $this->dispatcher->getListenerPriority($eventName, $this->listener) : null,
             'pretty' => $this->pretty,
             'stub' => $this->stub,
-        );
+        ];
     }
 
     public function __invoke(Event $event, $eventName, EventDispatcherInterface $dispatcher)
diff --git a/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php b/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
index 4c8db4c695..674890aa53 100644
--- a/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
+++ b/src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php
@@ -28,7 +28,7 @@ class RegisterListenersPass implements CompilerPassInterface
     protected $listenerTag;
     protected $subscriberTag;
 
-    private $hotPathEvents = array();
+    private $hotPathEvents = [];
     private $hotPathTagName;
 
     public function __construct(string $dispatcherService = 'event_dispatcher', string $listenerTag = 'kernel.event_listener', string $subscriberTag = 'kernel.event_subscriber')
@@ -63,10 +63,10 @@ class RegisterListenersPass implements CompilerPassInterface
                 }
 
                 if (!isset($event['method'])) {
-                    $event['method'] = 'on'.preg_replace_callback(array(
+                    $event['method'] = 'on'.preg_replace_callback([
                         '/(?<=\b)[a-z]/i',
                         '/[^a-z0-9]/i',
-                    ), function ($matches) { return strtoupper($matches[0]); }, $event['event']);
+                    ], function ($matches) { return strtoupper($matches[0]); }, $event['event']);
                     $event['method'] = preg_replace('/[^a-z0-9]/i', '', $event['method']);
 
                     if (null !== ($class = $container->getDefinition($id)->getClass()) && ($r = $container->getReflectionClass($class, false)) && !$r->hasMethod($event['method']) && $r->hasMethod('__invoke')) {
@@ -74,7 +74,7 @@ class RegisterListenersPass implements CompilerPassInterface
                     }
                 }
 
-                $definition->addMethodCall('addListener', array($event['event'], array(new ServiceClosureArgument(new Reference($id)), $event['method']), $priority));
+                $definition->addMethodCall('addListener', [$event['event'], [new ServiceClosureArgument(new Reference($id)), $event['method']], $priority]);
 
                 if (isset($this->hotPathEvents[$event['event']])) {
                     $container->getDefinition($id)->addTag($this->hotPathTagName);
@@ -101,14 +101,14 @@ class RegisterListenersPass implements CompilerPassInterface
             ExtractingEventDispatcher::$subscriber = $class;
             $extractingDispatcher->addSubscriber($extractingDispatcher);
             foreach ($extractingDispatcher->listeners as $args) {
-                $args[1] = array(new ServiceClosureArgument(new Reference($id)), $args[1]);
+                $args[1] = [new ServiceClosureArgument(new Reference($id)), $args[1]];
                 $definition->addMethodCall('addListener', $args);
 
                 if (isset($this->hotPathEvents[$args[0]])) {
                     $container->getDefinition($id)->addTag('container.hot_path');
                 }
             }
-            $extractingDispatcher->listeners = array();
+            $extractingDispatcher->listeners = [];
         }
     }
 }
@@ -118,18 +118,18 @@ class RegisterListenersPass implements CompilerPassInterface
  */
 class ExtractingEventDispatcher extends EventDispatcher implements EventSubscriberInterface
 {
-    public $listeners = array();
+    public $listeners = [];
 
     public static $subscriber;
 
     public function addListener($eventName, $listener, $priority = 0)
     {
-        $this->listeners[] = array($eventName, $listener[1], $priority);
+        $this->listeners[] = [$eventName, $listener[1], $priority];
     }
 
     public static function getSubscribedEvents()
     {
-        $callback = array(self::$subscriber, 'getSubscribedEvents');
+        $callback = [self::$subscriber, 'getSubscribedEvents'];
 
         return $callback();
     }
diff --git a/src/Symfony/Component/EventDispatcher/EventSubscriberInterface.php b/src/Symfony/Component/EventDispatcher/EventSubscriberInterface.php
index 6e1976b86a..824f21599c 100644
--- a/src/Symfony/Component/EventDispatcher/EventSubscriberInterface.php
+++ b/src/Symfony/Component/EventDispatcher/EventSubscriberInterface.php
@@ -36,9 +36,9 @@ interface EventSubscriberInterface
      *
      * For instance:
      *
-     *  * array('eventName' => 'methodName')
-     *  * array('eventName' => array('methodName', $priority))
-     *  * array('eventName' => array(array('methodName1', $priority), array('methodName2')))
+     *  * ['eventName' => 'methodName']
+     *  * ['eventName' => ['methodName', $priority]]
+     *  * ['eventName' => [['methodName1', $priority], ['methodName2']]]
      *
      * @return array The event names to listen to
      */
diff --git a/src/Symfony/Component/EventDispatcher/GenericEvent.php b/src/Symfony/Component/EventDispatcher/GenericEvent.php
index f0be7e18ff..a9a0a5dfa5 100644
--- a/src/Symfony/Component/EventDispatcher/GenericEvent.php
+++ b/src/Symfony/Component/EventDispatcher/GenericEvent.php
@@ -29,7 +29,7 @@ class GenericEvent extends Event implements \ArrayAccess, \IteratorAggregate
      * @param mixed $subject   The subject of the event, usually an object or a callable
      * @param array $arguments Arguments to store in the event
      */
-    public function __construct($subject = null, array $arguments = array())
+    public function __construct($subject = null, array $arguments = [])
     {
         $this->subject = $subject;
         $this->arguments = $arguments;
@@ -95,7 +95,7 @@ class GenericEvent extends Event implements \ArrayAccess, \IteratorAggregate
      *
      * @return $this
      */
-    public function setArguments(array $args = array())
+    public function setArguments(array $args = [])
     {
         $this->arguments = $args;
 
diff --git a/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php b/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
index 0a2b32794d..9a3697a36f 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/Debug/TraceableEventDispatcherTest.php
@@ -98,7 +98,7 @@ class TraceableEventDispatcherTest extends TestCase
         $tdispatcher->addSubscriber($subscriber);
         $listeners = $dispatcher->getListeners('foo');
         $this->assertCount(1, $listeners);
-        $this->assertSame(array($subscriber, 'call'), $listeners[0]);
+        $this->assertSame([$subscriber, 'call'], $listeners[0]);
 
         $tdispatcher->removeSubscriber($subscriber);
         $this->assertCount(0, $dispatcher->getListeners('foo'));
@@ -112,16 +112,16 @@ class TraceableEventDispatcherTest extends TestCase
         $listeners = $tdispatcher->getNotCalledListeners();
         $this->assertArrayHasKey('stub', $listeners[0]);
         unset($listeners[0]['stub']);
-        $this->assertEquals(array(), $tdispatcher->getCalledListeners());
-        $this->assertEquals(array(array('event' => 'foo', 'pretty' => 'closure', 'priority' => 5)), $listeners);
+        $this->assertEquals([], $tdispatcher->getCalledListeners());
+        $this->assertEquals([['event' => 'foo', 'pretty' => 'closure', 'priority' => 5]], $listeners);
 
         $tdispatcher->dispatch('foo');
 
         $listeners = $tdispatcher->getCalledListeners();
         $this->assertArrayHasKey('stub', $listeners[0]);
         unset($listeners[0]['stub']);
-        $this->assertEquals(array(array('event' => 'foo', 'pretty' => 'closure', 'priority' => 5)), $listeners);
-        $this->assertEquals(array(), $tdispatcher->getNotCalledListeners());
+        $this->assertEquals([['event' => 'foo', 'pretty' => 'closure', 'priority' => 5]], $listeners);
+        $this->assertEquals([], $tdispatcher->getNotCalledListeners());
     }
 
     public function testClearCalledListeners()
@@ -135,8 +135,8 @@ class TraceableEventDispatcherTest extends TestCase
         $listeners = $tdispatcher->getNotCalledListeners();
         $this->assertArrayHasKey('stub', $listeners[0]);
         unset($listeners[0]['stub']);
-        $this->assertEquals(array(), $tdispatcher->getCalledListeners());
-        $this->assertEquals(array(array('event' => 'foo', 'pretty' => 'closure', 'priority' => 5)), $listeners);
+        $this->assertEquals([], $tdispatcher->getCalledListeners());
+        $this->assertEquals([['event' => 'foo', 'pretty' => 'closure', 'priority' => 5]], $listeners);
     }
 
     public function testDispatchAfterReset()
@@ -178,7 +178,7 @@ class TraceableEventDispatcherTest extends TestCase
         $tdispatcher->dispatch('foo');
         $events = $tdispatcher->getOrphanedEvents();
         $this->assertCount(1, $events);
-        $this->assertEquals(array('foo'), $events);
+        $this->assertEquals(['foo'], $events);
     }
 
     public function testItDoesNotReturnHandledEvents()
@@ -199,8 +199,8 @@ class TraceableEventDispatcherTest extends TestCase
         $tdispatcher->addListener('foo', $listener1 = function () {});
         $tdispatcher->addListener('foo', $listener2 = function () {});
 
-        $logger->expects($this->at(0))->method('debug')->with('Notified event "{event}" to listener "{listener}".', array('event' => 'foo', 'listener' => 'closure'));
-        $logger->expects($this->at(1))->method('debug')->with('Notified event "{event}" to listener "{listener}".', array('event' => 'foo', 'listener' => 'closure'));
+        $logger->expects($this->at(0))->method('debug')->with('Notified event "{event}" to listener "{listener}".', ['event' => 'foo', 'listener' => 'closure']);
+        $logger->expects($this->at(1))->method('debug')->with('Notified event "{event}" to listener "{listener}".', ['event' => 'foo', 'listener' => 'closure']);
 
         $tdispatcher->dispatch('foo');
     }
@@ -214,16 +214,16 @@ class TraceableEventDispatcherTest extends TestCase
         $tdispatcher->addListener('foo', $listener1 = function (Event $event) { $event->stopPropagation(); });
         $tdispatcher->addListener('foo', $listener2 = function () {});
 
-        $logger->expects($this->at(0))->method('debug')->with('Notified event "{event}" to listener "{listener}".', array('event' => 'foo', 'listener' => 'closure'));
-        $logger->expects($this->at(1))->method('debug')->with('Listener "{listener}" stopped propagation of the event "{event}".', array('event' => 'foo', 'listener' => 'closure'));
-        $logger->expects($this->at(2))->method('debug')->with('Listener "{listener}" was not called for event "{event}".', array('event' => 'foo', 'listener' => 'closure'));
+        $logger->expects($this->at(0))->method('debug')->with('Notified event "{event}" to listener "{listener}".', ['event' => 'foo', 'listener' => 'closure']);
+        $logger->expects($this->at(1))->method('debug')->with('Listener "{listener}" stopped propagation of the event "{event}".', ['event' => 'foo', 'listener' => 'closure']);
+        $logger->expects($this->at(2))->method('debug')->with('Listener "{listener}" was not called for event "{event}".', ['event' => 'foo', 'listener' => 'closure']);
 
         $tdispatcher->dispatch('foo');
     }
 
     public function testDispatchCallListeners()
     {
-        $called = array();
+        $called = [];
 
         $dispatcher = new EventDispatcher();
         $tdispatcher = new TraceableEventDispatcher($dispatcher, new Stopwatch());
@@ -232,7 +232,7 @@ class TraceableEventDispatcherTest extends TestCase
 
         $tdispatcher->dispatch('foo');
 
-        $this->assertSame(array('foo2', 'foo1'), $called);
+        $this->assertSame(['foo2', 'foo1'], $called);
     }
 
     public function testDispatchNested()
@@ -300,6 +300,6 @@ class EventSubscriber implements EventSubscriberInterface
 {
     public static function getSubscribedEvents()
     {
-        return array('foo' => 'call');
+        return ['foo' => 'call'];
     }
 }
diff --git a/src/Symfony/Component/EventDispatcher/Tests/Debug/WrappedListenerTest.php b/src/Symfony/Component/EventDispatcher/Tests/Debug/WrappedListenerTest.php
index 3847a1553c..56792fe33a 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/Debug/WrappedListenerTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/Debug/WrappedListenerTest.php
@@ -30,16 +30,16 @@ class WrappedListenerTest extends TestCase
 
     public function provideListenersToDescribe()
     {
-        return array(
-            array(new FooListener(), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::__invoke'),
-            array(array(new FooListener(), 'listen'), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listen'),
-            array(array('Symfony\Component\EventDispatcher\Tests\Debug\FooListener', 'listenStatic'), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listenStatic'),
-            array('var_dump', 'var_dump'),
-            array(function () {}, 'closure'),
-            array(\Closure::fromCallable(array(new FooListener(), 'listen')), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listen'),
-            array(\Closure::fromCallable(array('Symfony\Component\EventDispatcher\Tests\Debug\FooListener', 'listenStatic')), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listenStatic'),
-            array(\Closure::fromCallable(function () {}), 'closure'),
-        );
+        return [
+            [new FooListener(), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::__invoke'],
+            [[new FooListener(), 'listen'], 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listen'],
+            [['Symfony\Component\EventDispatcher\Tests\Debug\FooListener', 'listenStatic'], 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listenStatic'],
+            ['var_dump', 'var_dump'],
+            [function () {}, 'closure'],
+            [\Closure::fromCallable([new FooListener(), 'listen']), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listen'],
+            [\Closure::fromCallable(['Symfony\Component\EventDispatcher\Tests\Debug\FooListener', 'listenStatic']), 'Symfony\Component\EventDispatcher\Tests\Debug\FooListener::listenStatic'],
+            [\Closure::fromCallable(function () {}), 'closure'],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php b/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
index a359bd7ec5..d665f426e0 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/DependencyInjection/RegisterListenersPassTest.php
@@ -38,9 +38,9 @@ class RegisterListenersPassTest extends TestCase
 
     public function testValidEventSubscriber()
     {
-        $services = array(
-            'my_event_subscriber' => array(0 => array()),
-        );
+        $services = [
+            'my_event_subscriber' => [0 => []],
+        ];
 
         $builder = new ContainerBuilder();
         $eventDispatcherDefinition = $builder->register('event_dispatcher');
@@ -50,16 +50,16 @@ class RegisterListenersPassTest extends TestCase
         $registerListenersPass = new RegisterListenersPass();
         $registerListenersPass->process($builder);
 
-        $expectedCalls = array(
-            array(
+        $expectedCalls = [
+            [
                 'addListener',
-                array(
+                [
                     'event',
-                    array(new ServiceClosureArgument(new Reference('my_event_subscriber')), 'onEvent'),
+                    [new ServiceClosureArgument(new Reference('my_event_subscriber')), 'onEvent'],
                     0,
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $this->assertEquals($expectedCalls, $eventDispatcherDefinition->getMethodCalls());
     }
 
@@ -70,7 +70,7 @@ class RegisterListenersPassTest extends TestCase
     public function testAbstractEventListener()
     {
         $container = new ContainerBuilder();
-        $container->register('foo', 'stdClass')->setAbstract(true)->addTag('kernel.event_listener', array());
+        $container->register('foo', 'stdClass')->setAbstract(true)->addTag('kernel.event_listener', []);
         $container->register('event_dispatcher', 'stdClass');
 
         $registerListenersPass = new RegisterListenersPass();
@@ -84,7 +84,7 @@ class RegisterListenersPassTest extends TestCase
     public function testAbstractEventSubscriber()
     {
         $container = new ContainerBuilder();
-        $container->register('foo', 'stdClass')->setAbstract(true)->addTag('kernel.event_subscriber', array());
+        $container->register('foo', 'stdClass')->setAbstract(true)->addTag('kernel.event_subscriber', []);
         $container->register('event_dispatcher', 'stdClass');
 
         $registerListenersPass = new RegisterListenersPass();
@@ -96,23 +96,23 @@ class RegisterListenersPassTest extends TestCase
         $container = new ContainerBuilder();
 
         $container->setParameter('subscriber.class', 'Symfony\Component\EventDispatcher\Tests\DependencyInjection\SubscriberService');
-        $container->register('foo', '%subscriber.class%')->addTag('kernel.event_subscriber', array());
+        $container->register('foo', '%subscriber.class%')->addTag('kernel.event_subscriber', []);
         $container->register('event_dispatcher', 'stdClass');
 
         $registerListenersPass = new RegisterListenersPass();
         $registerListenersPass->process($container);
 
         $definition = $container->getDefinition('event_dispatcher');
-        $expectedCalls = array(
-            array(
+        $expectedCalls = [
+            [
                 'addListener',
-                array(
+                [
                     'event',
-                    array(new ServiceClosureArgument(new Reference('foo')), 'onEvent'),
+                    [new ServiceClosureArgument(new Reference('foo')), 'onEvent'],
                     0,
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $this->assertEquals($expectedCalls, $definition->getMethodCalls());
     }
 
@@ -120,10 +120,10 @@ class RegisterListenersPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $container->register('foo', SubscriberService::class)->addTag('kernel.event_subscriber', array());
+        $container->register('foo', SubscriberService::class)->addTag('kernel.event_subscriber', []);
         $container->register('event_dispatcher', 'stdClass');
 
-        (new RegisterListenersPass())->setHotPathEvents(array('event'))->process($container);
+        (new RegisterListenersPass())->setHotPathEvents(['event'])->process($container);
 
         $this->assertTrue($container->getDefinition('foo')->hasTag('container.hot_path'));
     }
@@ -135,7 +135,7 @@ class RegisterListenersPassTest extends TestCase
     public function testEventSubscriberUnresolvableClassName()
     {
         $container = new ContainerBuilder();
-        $container->register('foo', '%subscriber.class%')->addTag('kernel.event_subscriber', array());
+        $container->register('foo', '%subscriber.class%')->addTag('kernel.event_subscriber', []);
         $container->register('event_dispatcher', 'stdClass');
 
         $registerListenersPass = new RegisterListenersPass();
@@ -145,41 +145,41 @@ class RegisterListenersPassTest extends TestCase
     public function testInvokableEventListener()
     {
         $container = new ContainerBuilder();
-        $container->register('foo', \stdClass::class)->addTag('kernel.event_listener', array('event' => 'foo.bar'));
-        $container->register('bar', InvokableListenerService::class)->addTag('kernel.event_listener', array('event' => 'foo.bar'));
-        $container->register('baz', InvokableListenerService::class)->addTag('kernel.event_listener', array('event' => 'event'));
+        $container->register('foo', \stdClass::class)->addTag('kernel.event_listener', ['event' => 'foo.bar']);
+        $container->register('bar', InvokableListenerService::class)->addTag('kernel.event_listener', ['event' => 'foo.bar']);
+        $container->register('baz', InvokableListenerService::class)->addTag('kernel.event_listener', ['event' => 'event']);
         $container->register('event_dispatcher', \stdClass::class);
 
         $registerListenersPass = new RegisterListenersPass();
         $registerListenersPass->process($container);
 
         $definition = $container->getDefinition('event_dispatcher');
-        $expectedCalls = array(
-            array(
+        $expectedCalls = [
+            [
                 'addListener',
-                array(
+                [
                     'foo.bar',
-                    array(new ServiceClosureArgument(new Reference('foo')), 'onFooBar'),
+                    [new ServiceClosureArgument(new Reference('foo')), 'onFooBar'],
                     0,
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'addListener',
-                array(
+                [
                     'foo.bar',
-                    array(new ServiceClosureArgument(new Reference('bar')), '__invoke'),
+                    [new ServiceClosureArgument(new Reference('bar')), '__invoke'],
                     0,
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'addListener',
-                array(
+                [
                     'event',
-                    array(new ServiceClosureArgument(new Reference('baz')), 'onEvent'),
+                    [new ServiceClosureArgument(new Reference('baz')), 'onEvent'],
                     0,
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $this->assertEquals($expectedCalls, $definition->getMethodCalls());
     }
 }
@@ -188,9 +188,9 @@ class SubscriberService implements \Symfony\Component\EventDispatcher\EventSubsc
 {
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             'event' => 'onEvent',
-        );
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php b/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
index 44485c9930..e9e011a29d 100644
--- a/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
+++ b/src/Symfony/Component/EventDispatcher/Tests/GenericEventTest.php
@@ -32,7 +32,7 @@ class GenericEventTest extends TestCase
     protected function setUp()
     {
         $this->subject = new \stdClass();
-        $this->event = new GenericEvent($this->subject, array('name' => 'Event'));
+        $this->event = new GenericEvent($this->subject, ['name' => 'Event']);
     }
 
     /**
@@ -46,7 +46,7 @@ class GenericEventTest extends TestCase
 
     public function testConstruct()
     {
-        $this->assertEquals($this->event, new GenericEvent($this->subject, array('name' => 'Event')));
+        $this->assertEquals($this->event, new GenericEvent($this->subject, ['name' => 'Event']));
     }
 
     /**
@@ -55,20 +55,20 @@ class GenericEventTest extends TestCase
     public function testGetArguments()
     {
         // test getting all
-        $this->assertSame(array('name' => 'Event'), $this->event->getArguments());
+        $this->assertSame(['name' => 'Event'], $this->event->getArguments());
     }
 
     public function testSetArguments()
     {
-        $result = $this->event->setArguments(array('foo' => 'bar'));
-        $this->assertAttributeSame(array('foo' => 'bar'), 'arguments', $this->event);
+        $result = $this->event->setArguments(['foo' => 'bar']);
+        $this->assertAttributeSame(['foo' => 'bar'], 'arguments', $this->event);
         $this->assertSame($this->event, $result);
     }
 
     public function testSetArgument()
     {
         $result = $this->event->setArgument('foo2', 'bar2');
-        $this->assertAttributeSame(array('name' => 'Event', 'foo2' => 'bar2'), 'arguments', $this->event);
+        $this->assertAttributeSame(['name' => 'Event', 'foo2' => 'bar2'], 'arguments', $this->event);
         $this->assertEquals($this->event, $result);
     }
 
@@ -99,13 +99,13 @@ class GenericEventTest extends TestCase
     public function testOffsetSet()
     {
         $this->event['foo2'] = 'bar2';
-        $this->assertAttributeSame(array('name' => 'Event', 'foo2' => 'bar2'), 'arguments', $this->event);
+        $this->assertAttributeSame(['name' => 'Event', 'foo2' => 'bar2'], 'arguments', $this->event);
     }
 
     public function testOffsetUnset()
     {
         unset($this->event['name']);
-        $this->assertAttributeSame(array(), 'arguments', $this->event);
+        $this->assertAttributeSame([], 'arguments', $this->event);
     }
 
     public function testOffsetIsset()
@@ -127,10 +127,10 @@ class GenericEventTest extends TestCase
 
     public function testHasIterator()
     {
-        $data = array();
+        $data = [];
         foreach ($this->event as $key => $value) {
             $data[$key] = $value;
         }
-        $this->assertEquals(array('name' => 'Event'), $data);
+        $this->assertEquals(['name' => 'Event'], $data);
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Compiler.php b/src/Symfony/Component/ExpressionLanguage/Compiler.php
index 23222d40e9..604f04c6f0 100644
--- a/src/Symfony/Component/ExpressionLanguage/Compiler.php
+++ b/src/Symfony/Component/ExpressionLanguage/Compiler.php
@@ -127,7 +127,7 @@ class Compiler implements ResetInterface
         } elseif (\is_bool($value)) {
             $this->raw($value ? 'true' : 'false');
         } elseif (\is_array($value)) {
-            $this->raw('array(');
+            $this->raw('[');
             $first = true;
             foreach ($value as $key => $value) {
                 if (!$first) {
@@ -138,7 +138,7 @@ class Compiler implements ResetInterface
                 $this->raw(' => ');
                 $this->repr($value);
             }
-            $this->raw(')');
+            $this->raw(']');
         } else {
             $this->string($value);
         }
diff --git a/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php b/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
index 851fe00157..51a01689a6 100644
--- a/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
+++ b/src/Symfony/Component/ExpressionLanguage/ExpressionLanguage.php
@@ -26,13 +26,13 @@ class ExpressionLanguage
     private $parser;
     private $compiler;
 
-    protected $functions = array();
+    protected $functions = [];
 
     /**
      * @param CacheItemPoolInterface                $cache
      * @param ExpressionFunctionProviderInterface[] $providers
      */
-    public function __construct(CacheItemPoolInterface $cache = null, array $providers = array())
+    public function __construct(CacheItemPoolInterface $cache = null, array $providers = [])
     {
         $this->cache = $cache ?: new ArrayAdapter();
         $this->registerFunctions();
@@ -49,7 +49,7 @@ class ExpressionLanguage
      *
      * @return string The compiled PHP source code
      */
-    public function compile($expression, $names = array())
+    public function compile($expression, $names = [])
     {
         return $this->getCompiler()->compile($this->parse($expression, $names)->getNodes())->getSource();
     }
@@ -62,7 +62,7 @@ class ExpressionLanguage
      *
      * @return mixed The result of the evaluation of the expression
      */
-    public function evaluate($expression, $values = array())
+    public function evaluate($expression, $values = [])
     {
         return $this->parse($expression, array_keys($values))->getNodes()->evaluate($this->functions, $values);
     }
@@ -82,7 +82,7 @@ class ExpressionLanguage
         }
 
         asort($names);
-        $cacheKeyItems = array();
+        $cacheKeyItems = [];
 
         foreach ($names as $nameKey => $name) {
             $cacheKeyItems[] = \is_int($nameKey) ? $name : $nameKey.':'.$name;
@@ -118,7 +118,7 @@ class ExpressionLanguage
             throw new \LogicException('Registering functions after calling evaluate(), compile() or parse() is not supported.');
         }
 
-        $this->functions[$name] = array('compiler' => $compiler, 'evaluator' => $evaluator);
+        $this->functions[$name] = ['compiler' => $compiler, 'evaluator' => $evaluator];
     }
 
     public function addFunction(ExpressionFunction $function)
diff --git a/src/Symfony/Component/ExpressionLanguage/Lexer.php b/src/Symfony/Component/ExpressionLanguage/Lexer.php
index bd54e8913a..48b15ffe7c 100644
--- a/src/Symfony/Component/ExpressionLanguage/Lexer.php
+++ b/src/Symfony/Component/ExpressionLanguage/Lexer.php
@@ -29,10 +29,10 @@ class Lexer
      */
     public function tokenize($expression)
     {
-        $expression = str_replace(array("\r", "\n", "\t", "\v", "\f"), ' ', $expression);
+        $expression = str_replace(["\r", "\n", "\t", "\v", "\f"], ' ', $expression);
         $cursor = 0;
-        $tokens = array();
-        $brackets = array();
+        $tokens = [];
+        $brackets = [];
         $end = \strlen($expression);
 
         while ($cursor < $end) {
@@ -52,7 +52,7 @@ class Lexer
                 $cursor += \strlen($match[0]);
             } elseif (false !== strpos('([{', $expression[$cursor])) {
                 // opening bracket
-                $brackets[] = array($expression[$cursor], $cursor);
+                $brackets[] = [$expression[$cursor], $cursor];
 
                 $tokens[] = new Token(Token::PUNCTUATION_TYPE, $expression[$cursor], $cursor + 1);
                 ++$cursor;
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/ArgumentsNode.php b/src/Symfony/Component/ExpressionLanguage/Node/ArgumentsNode.php
index 1c78d8054b..e9849a448a 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/ArgumentsNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/ArgumentsNode.php
@@ -27,7 +27,7 @@ class ArgumentsNode extends ArrayNode
 
     public function toArray()
     {
-        $array = array();
+        $array = [];
 
         foreach ($this->getKeyValuePairs() as $pair) {
             $array[] = $pair['value'];
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php b/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
index e1a2f2e904..921319a744 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
@@ -41,14 +41,14 @@ class ArrayNode extends Node
      */
     public function compile(Compiler $compiler)
     {
-        $compiler->raw('array(');
+        $compiler->raw('[');
         $this->compileArguments($compiler);
-        $compiler->raw(')');
+        $compiler->raw(']');
     }
 
     public function evaluate($functions, $values)
     {
-        $result = array();
+        $result = [];
         foreach ($this->getKeyValuePairs() as $pair) {
             $result[$pair['key']->evaluate($functions, $values)] = $pair['value']->evaluate($functions, $values);
         }
@@ -58,12 +58,12 @@ class ArrayNode extends Node
 
     public function toArray()
     {
-        $value = array();
+        $value = [];
         foreach ($this->getKeyValuePairs() as $pair) {
             $value[$pair['key']->attributes['value']] = $pair['value'];
         }
 
-        $array = array();
+        $array = [];
 
         if ($this->isHash($value)) {
             foreach ($value as $k => $v) {
@@ -88,9 +88,9 @@ class ArrayNode extends Node
 
     protected function getKeyValuePairs()
     {
-        $pairs = array();
+        $pairs = [];
         foreach (array_chunk($this->nodes, 2) as $pair) {
-            $pairs[] = array('key' => $pair[0], 'value' => $pair[1]);
+            $pairs[] = ['key' => $pair[0], 'value' => $pair[1]];
         }
 
         return $pairs;
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
index 48c6548fa8..0af4f16623 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/BinaryNode.php
@@ -20,24 +20,24 @@ use Symfony\Component\ExpressionLanguage\Compiler;
  */
 class BinaryNode extends Node
 {
-    private static $operators = array(
+    private static $operators = [
         '~' => '.',
         'and' => '&&',
         'or' => '||',
-    );
+    ];
 
-    private static $functions = array(
+    private static $functions = [
         '**' => 'pow',
         '..' => 'range',
         'in' => 'in_array',
         'not in' => '!in_array',
-    );
+    ];
 
     public function __construct(string $operator, Node $left, Node $right)
     {
         parent::__construct(
-            array('left' => $left, 'right' => $right),
-            array('operator' => $operator)
+            ['left' => $left, 'right' => $right],
+            ['operator' => $operator]
         );
     }
 
@@ -157,6 +157,6 @@ class BinaryNode extends Node
 
     public function toArray()
     {
-        return array('(', $this->nodes['left'], ' '.$this->attributes['operator'].' ', $this->nodes['right'], ')');
+        return ['(', $this->nodes['left'], ' '.$this->attributes['operator'].' ', $this->nodes['right'], ')'];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/ConditionalNode.php b/src/Symfony/Component/ExpressionLanguage/Node/ConditionalNode.php
index 9db0f931aa..ca1b484bc0 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/ConditionalNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/ConditionalNode.php
@@ -23,7 +23,7 @@ class ConditionalNode extends Node
     public function __construct(Node $expr1, Node $expr2, Node $expr3)
     {
         parent::__construct(
-            array('expr1' => $expr1, 'expr2' => $expr2, 'expr3' => $expr3)
+            ['expr1' => $expr1, 'expr2' => $expr2, 'expr3' => $expr3]
         );
     }
 
@@ -51,6 +51,6 @@ class ConditionalNode extends Node
 
     public function toArray()
     {
-        return array('(', $this->nodes['expr1'], ' ? ', $this->nodes['expr2'], ' : ', $this->nodes['expr3'], ')');
+        return ['(', $this->nodes['expr1'], ' ? ', $this->nodes['expr2'], ' : ', $this->nodes['expr3'], ')'];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/ConstantNode.php b/src/Symfony/Component/ExpressionLanguage/Node/ConstantNode.php
index de2c48f10d..0353f78510 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/ConstantNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/ConstantNode.php
@@ -26,8 +26,8 @@ class ConstantNode extends Node
     {
         $this->isIdentifier = $isIdentifier;
         parent::__construct(
-            array(),
-            array('value' => $value)
+            [],
+            ['value' => $value]
         );
     }
 
@@ -43,7 +43,7 @@ class ConstantNode extends Node
 
     public function toArray()
     {
-        $array = array();
+        $array = [];
         $value = $this->attributes['value'];
 
         if ($this->isIdentifier) {
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php b/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
index fd24e1300f..2a46191061 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/FunctionNode.php
@@ -23,14 +23,14 @@ class FunctionNode extends Node
     public function __construct(string $name, Node $arguments)
     {
         parent::__construct(
-            array('arguments' => $arguments),
-            array('name' => $name)
+            ['arguments' => $arguments],
+            ['name' => $name]
         );
     }
 
     public function compile(Compiler $compiler)
     {
-        $arguments = array();
+        $arguments = [];
         foreach ($this->nodes['arguments']->nodes as $node) {
             $arguments[] = $compiler->subcompile($node);
         }
@@ -42,7 +42,7 @@ class FunctionNode extends Node
 
     public function evaluate($functions, $values)
     {
-        $arguments = array($values);
+        $arguments = [$values];
         foreach ($this->nodes['arguments']->nodes as $node) {
             $arguments[] = $node->evaluate($functions, $values);
         }
@@ -52,7 +52,7 @@ class FunctionNode extends Node
 
     public function toArray()
     {
-        $array = array();
+        $array = [];
         $array[] = $this->attributes['name'];
 
         foreach ($this->nodes['arguments']->nodes as $node) {
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
index 86c5a405f0..a28b596113 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/GetAttrNode.php
@@ -27,8 +27,8 @@ class GetAttrNode extends Node
     public function __construct(Node $node, Node $attribute, ArrayNode $arguments, int $type)
     {
         parent::__construct(
-            array('node' => $node, 'attribute' => $attribute, 'arguments' => $arguments),
-            array('type' => $type)
+            ['node' => $node, 'attribute' => $attribute, 'arguments' => $arguments],
+            ['type' => $type]
         );
     }
 
@@ -82,7 +82,7 @@ class GetAttrNode extends Node
                 if (!\is_object($obj)) {
                     throw new \RuntimeException('Unable to get a property on a non-object.');
                 }
-                if (!\is_callable($toCall = array($obj, $this->nodes['attribute']->attributes['value']))) {
+                if (!\is_callable($toCall = [$obj, $this->nodes['attribute']->attributes['value']])) {
                     throw new \RuntimeException(sprintf('Unable to call method "%s" of object "%s".', $this->nodes['attribute']->attributes['value'], \get_class($obj)));
                 }
 
@@ -102,13 +102,13 @@ class GetAttrNode extends Node
     {
         switch ($this->attributes['type']) {
             case self::PROPERTY_CALL:
-                return array($this->nodes['node'], '.', $this->nodes['attribute']);
+                return [$this->nodes['node'], '.', $this->nodes['attribute']];
 
             case self::METHOD_CALL:
-                return array($this->nodes['node'], '.', $this->nodes['attribute'], '(', $this->nodes['arguments'], ')');
+                return [$this->nodes['node'], '.', $this->nodes['attribute'], '(', $this->nodes['arguments'], ')'];
 
             case self::ARRAY_CALL:
-                return array($this->nodes['node'], '[', $this->nodes['attribute'], ']');
+                return [$this->nodes['node'], '[', $this->nodes['attribute'], ']'];
         }
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/NameNode.php b/src/Symfony/Component/ExpressionLanguage/Node/NameNode.php
index c084bd4793..1a3d994148 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/NameNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/NameNode.php
@@ -23,8 +23,8 @@ class NameNode extends Node
     public function __construct(string $name)
     {
         parent::__construct(
-            array(),
-            array('name' => $name)
+            [],
+            ['name' => $name]
         );
     }
 
@@ -40,6 +40,6 @@ class NameNode extends Node
 
     public function toArray()
     {
-        return array($this->attributes['name']);
+        return [$this->attributes['name']];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/Node.php b/src/Symfony/Component/ExpressionLanguage/Node/Node.php
index c6eb9f0351..7923cb1d64 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/Node.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/Node.php
@@ -20,14 +20,14 @@ use Symfony\Component\ExpressionLanguage\Compiler;
  */
 class Node
 {
-    public $nodes = array();
-    public $attributes = array();
+    public $nodes = [];
+    public $attributes = [];
 
     /**
      * @param array $nodes      An array of nodes
      * @param array $attributes An array of attributes
      */
-    public function __construct(array $nodes = array(), array $attributes = array())
+    public function __construct(array $nodes = [], array $attributes = [])
     {
         $this->nodes = $nodes;
         $this->attributes = $attributes;
@@ -35,12 +35,12 @@ class Node
 
     public function __toString()
     {
-        $attributes = array();
+        $attributes = [];
         foreach ($this->attributes as $name => $value) {
             $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
         }
 
-        $repr = array(str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', \get_class($this)).'('.implode(', ', $attributes));
+        $repr = [str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', \get_class($this)).'('.implode(', ', $attributes)];
 
         if (\count($this->nodes)) {
             foreach ($this->nodes as $node) {
@@ -66,7 +66,7 @@ class Node
 
     public function evaluate($functions, $values)
     {
-        $results = array();
+        $results = [];
         foreach ($this->nodes as $node) {
             $results[] = $node->evaluate($functions, $values);
         }
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/UnaryNode.php b/src/Symfony/Component/ExpressionLanguage/Node/UnaryNode.php
index 4a18e83a5d..abf2cc6bac 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/UnaryNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/UnaryNode.php
@@ -20,18 +20,18 @@ use Symfony\Component\ExpressionLanguage\Compiler;
  */
 class UnaryNode extends Node
 {
-    private static $operators = array(
+    private static $operators = [
         '!' => '!',
         'not' => '!',
         '+' => '+',
         '-' => '-',
-    );
+    ];
 
     public function __construct(string $operator, Node $node)
     {
         parent::__construct(
-            array('node' => $node),
-            array('operator' => $operator)
+            ['node' => $node],
+            ['operator' => $operator]
         );
     }
 
@@ -61,6 +61,6 @@ class UnaryNode extends Node
 
     public function toArray(): array
     {
-        return array('(', $this->attributes['operator'].' ', $this->nodes['node'], ')');
+        return ['(', $this->attributes['operator'].' ', $this->nodes['node'], ')'];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Parser.php b/src/Symfony/Component/ExpressionLanguage/Parser.php
index a3b31ce976..0930bac2ef 100644
--- a/src/Symfony/Component/ExpressionLanguage/Parser.php
+++ b/src/Symfony/Component/ExpressionLanguage/Parser.php
@@ -36,40 +36,40 @@ class Parser
     {
         $this->functions = $functions;
 
-        $this->unaryOperators = array(
-            'not' => array('precedence' => 50),
-            '!' => array('precedence' => 50),
-            '-' => array('precedence' => 500),
-            '+' => array('precedence' => 500),
-        );
-        $this->binaryOperators = array(
-            'or' => array('precedence' => 10, 'associativity' => self::OPERATOR_LEFT),
-            '||' => array('precedence' => 10, 'associativity' => self::OPERATOR_LEFT),
-            'and' => array('precedence' => 15, 'associativity' => self::OPERATOR_LEFT),
-            '&&' => array('precedence' => 15, 'associativity' => self::OPERATOR_LEFT),
-            '|' => array('precedence' => 16, 'associativity' => self::OPERATOR_LEFT),
-            '^' => array('precedence' => 17, 'associativity' => self::OPERATOR_LEFT),
-            '&' => array('precedence' => 18, 'associativity' => self::OPERATOR_LEFT),
-            '==' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '===' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '!=' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '!==' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '<' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '>' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '>=' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '<=' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            'not in' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            'in' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            'matches' => array('precedence' => 20, 'associativity' => self::OPERATOR_LEFT),
-            '..' => array('precedence' => 25, 'associativity' => self::OPERATOR_LEFT),
-            '+' => array('precedence' => 30, 'associativity' => self::OPERATOR_LEFT),
-            '-' => array('precedence' => 30, 'associativity' => self::OPERATOR_LEFT),
-            '~' => array('precedence' => 40, 'associativity' => self::OPERATOR_LEFT),
-            '*' => array('precedence' => 60, 'associativity' => self::OPERATOR_LEFT),
-            '/' => array('precedence' => 60, 'associativity' => self::OPERATOR_LEFT),
-            '%' => array('precedence' => 60, 'associativity' => self::OPERATOR_LEFT),
-            '**' => array('precedence' => 200, 'associativity' => self::OPERATOR_RIGHT),
-        );
+        $this->unaryOperators = [
+            'not' => ['precedence' => 50],
+            '!' => ['precedence' => 50],
+            '-' => ['precedence' => 500],
+            '+' => ['precedence' => 500],
+        ];
+        $this->binaryOperators = [
+            'or' => ['precedence' => 10, 'associativity' => self::OPERATOR_LEFT],
+            '||' => ['precedence' => 10, 'associativity' => self::OPERATOR_LEFT],
+            'and' => ['precedence' => 15, 'associativity' => self::OPERATOR_LEFT],
+            '&&' => ['precedence' => 15, 'associativity' => self::OPERATOR_LEFT],
+            '|' => ['precedence' => 16, 'associativity' => self::OPERATOR_LEFT],
+            '^' => ['precedence' => 17, 'associativity' => self::OPERATOR_LEFT],
+            '&' => ['precedence' => 18, 'associativity' => self::OPERATOR_LEFT],
+            '==' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '===' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '!=' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '!==' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '<' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '>' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '>=' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '<=' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            'not in' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            'in' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            'matches' => ['precedence' => 20, 'associativity' => self::OPERATOR_LEFT],
+            '..' => ['precedence' => 25, 'associativity' => self::OPERATOR_LEFT],
+            '+' => ['precedence' => 30, 'associativity' => self::OPERATOR_LEFT],
+            '-' => ['precedence' => 30, 'associativity' => self::OPERATOR_LEFT],
+            '~' => ['precedence' => 40, 'associativity' => self::OPERATOR_LEFT],
+            '*' => ['precedence' => 60, 'associativity' => self::OPERATOR_LEFT],
+            '/' => ['precedence' => 60, 'associativity' => self::OPERATOR_LEFT],
+            '%' => ['precedence' => 60, 'associativity' => self::OPERATOR_LEFT],
+            '**' => ['precedence' => 200, 'associativity' => self::OPERATOR_RIGHT],
+        ];
     }
 
     /**
@@ -92,7 +92,7 @@ class Parser
      *
      * @throws SyntaxError
      */
-    public function parse(TokenStream $stream, $names = array())
+    public function parse(TokenStream $stream, $names = [])
     {
         $this->stream = $stream;
         $this->names = $names;
@@ -364,7 +364,7 @@ class Parser
      */
     public function parseArguments()
     {
-        $args = array();
+        $args = [];
         $this->stream->expect(Token::PUNCTUATION_TYPE, '(', 'A list of arguments must begin with an opening parenthesis');
         while (!$this->stream->current->test(Token::PUNCTUATION_TYPE, ')')) {
             if (!empty($args)) {
diff --git a/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php b/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
index 74a100890d..e1196c7f51 100644
--- a/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
+++ b/src/Symfony/Component/ExpressionLanguage/Resources/bin/generate_operator_regex.php
@@ -9,11 +9,11 @@
  * file that was distributed with this source code.
  */
 
-$operators = array('not', '!', 'or', '||', '&&', 'and', '|', '^', '&', '==', '===', '!=', '!==', '<', '>', '>=', '<=', 'not in', 'in', '..', '+', '-', '~', '*', '/', '%', 'matches', '**');
+$operators = ['not', '!', 'or', '||', '&&', 'and', '|', '^', '&', '==', '===', '!=', '!==', '<', '>', '>=', '<=', 'not in', 'in', '..', '+', '-', '~', '*', '/', '%', 'matches', '**'];
 $operators = array_combine($operators, array_map('strlen', $operators));
 arsort($operators);
 
-$regex = array();
+$regex = [];
 foreach ($operators as $operator => $length) {
     // an operator that ends with a character must be followed by
     // a whitespace or a parenthesis
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
index 15a26d5f3f..f9c9dae42b 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ExpressionLanguageTest.php
@@ -56,10 +56,10 @@ class ExpressionLanguageTest extends TestCase
             ->with($cacheItemMock)
         ;
 
-        $parsedExpression = $expressionLanguage->parse('1 + 1', array());
+        $parsedExpression = $expressionLanguage->parse('1 + 1', []);
         $this->assertSame($savedParsedExpression, $parsedExpression);
 
-        $parsedExpression = $expressionLanguage->parse('1 + 1', array());
+        $parsedExpression = $expressionLanguage->parse('1 + 1', []);
         $this->assertSame($savedParsedExpression, $parsedExpression);
     }
 
@@ -74,7 +74,7 @@ class ExpressionLanguageTest extends TestCase
 
     public function testProviders()
     {
-        $expressionLanguage = new ExpressionLanguage(null, array(new TestProvider()));
+        $expressionLanguage = new ExpressionLanguage(null, [new TestProvider()]);
         $this->assertEquals('foo', $expressionLanguage->evaluate('identity("foo")'));
         $this->assertEquals('"foo"', $expressionLanguage->compile('identity("foo")'));
         $this->assertEquals('FOO', $expressionLanguage->evaluate('strtoupper("foo")'));
@@ -112,38 +112,38 @@ class ExpressionLanguageTest extends TestCase
     public function testParseThrowsInsteadOfNotice()
     {
         $expressionLanguage = new ExpressionLanguage();
-        $expressionLanguage->parse('node.', array('node'));
+        $expressionLanguage->parse('node.', ['node']);
     }
 
     public function shortCircuitProviderEvaluate()
     {
-        $object = $this->getMockBuilder('stdClass')->setMethods(array('foo'))->getMock();
+        $object = $this->getMockBuilder('stdClass')->setMethods(['foo'])->getMock();
         $object->expects($this->never())->method('foo');
 
-        return array(
-            array('false and object.foo()', array('object' => $object), false),
-            array('false && object.foo()', array('object' => $object), false),
-            array('true || object.foo()', array('object' => $object), true),
-            array('true or object.foo()', array('object' => $object), true),
-        );
+        return [
+            ['false and object.foo()', ['object' => $object], false],
+            ['false && object.foo()', ['object' => $object], false],
+            ['true || object.foo()', ['object' => $object], true],
+            ['true or object.foo()', ['object' => $object], true],
+        ];
     }
 
     public function shortCircuitProviderCompile()
     {
-        return array(
-            array('false and foo', array('foo' => 'foo'), false),
-            array('false && foo', array('foo' => 'foo'), false),
-            array('true || foo', array('foo' => 'foo'), true),
-            array('true or foo', array('foo' => 'foo'), true),
-        );
+        return [
+            ['false and foo', ['foo' => 'foo'], false],
+            ['false && foo', ['foo' => 'foo'], false],
+            ['true || foo', ['foo' => 'foo'], true],
+            ['true or foo', ['foo' => 'foo'], true],
+        ];
     }
 
     public function testCachingForOverriddenVariableNames()
     {
         $expressionLanguage = new ExpressionLanguage();
         $expression = 'a + b';
-        $expressionLanguage->evaluate($expression, array('a' => 1, 'b' => 1));
-        $result = $expressionLanguage->compile($expression, array('a', 'B' => 'b'));
+        $expressionLanguage->evaluate($expression, ['a' => 1, 'b' => 1]);
+        $result = $expressionLanguage->compile($expression, ['a', 'B' => 'b']);
         $this->assertSame('($a + $B)', $result);
     }
 
@@ -151,7 +151,7 @@ class ExpressionLanguageTest extends TestCase
     {
         $expressionLanguage = new ExpressionLanguage();
         $expression = '123 === a';
-        $result = $expressionLanguage->compile($expression, array('a'));
+        $result = $expressionLanguage->compile($expression, ['a']);
         $this->assertSame('(123 === $a)', $result);
     }
 
@@ -160,7 +160,7 @@ class ExpressionLanguageTest extends TestCase
         $cacheMock = $this->getMockBuilder('Psr\Cache\CacheItemPoolInterface')->getMock();
         $cacheItemMock = $this->getMockBuilder('Psr\Cache\CacheItemInterface')->getMock();
         $expressionLanguage = new ExpressionLanguage($cacheMock);
-        $savedParsedExpressions = array();
+        $savedParsedExpressions = [];
 
         $cacheMock
             ->expects($this->exactly(2))
@@ -193,8 +193,8 @@ class ExpressionLanguageTest extends TestCase
         ;
 
         $expression = 'a + b';
-        $expressionLanguage->compile($expression, array('a', 'B' => 'b'));
-        $expressionLanguage->compile($expression, array('B' => 'b', 'a'));
+        $expressionLanguage->compile($expression, ['a', 'B' => 'b']);
+        $expressionLanguage->compile($expression, ['B' => 'b', 'a']);
     }
 
     /**
@@ -204,7 +204,7 @@ class ExpressionLanguageTest extends TestCase
     public function testRegisterAfterParse($registerCallback)
     {
         $el = new ExpressionLanguage();
-        $el->parse('1 + 1', array());
+        $el->parse('1 + 1', []);
         $registerCallback($el);
     }
 
@@ -226,7 +226,7 @@ class ExpressionLanguageTest extends TestCase
     public function testCallBadCallable()
     {
         $el = new ExpressionLanguage();
-        $el->evaluate('foo.myfunction()', array('foo' => new \stdClass()));
+        $el->evaluate('foo.myfunction()', ['foo' => new \stdClass()]);
     }
 
     /**
@@ -242,22 +242,22 @@ class ExpressionLanguageTest extends TestCase
 
     public function getRegisterCallbacks()
     {
-        return array(
-            array(
+        return [
+            [
                 function (ExpressionLanguage $el) {
                     $el->register('fn', function () {}, function () {});
                 },
-            ),
-            array(
+            ],
+            [
                 function (ExpressionLanguage $el) {
                     $el->addFunction(new ExpressionFunction('fn', function () {}, function () {}));
                 },
-            ),
-            array(
+            ],
+            [
                 function (ExpressionLanguage $el) {
                     $el->registerProvider(new TestProvider());
                 },
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/TestProvider.php b/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/TestProvider.php
index 20c5182bba..8405d4f975 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/TestProvider.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Fixtures/TestProvider.php
@@ -19,7 +19,7 @@ class TestProvider implements ExpressionFunctionProviderInterface
 {
     public function getFunctions()
     {
-        return array(
+        return [
             new ExpressionFunction('identity', function ($input) {
                 return $input;
             }, function (array $values, $input) {
@@ -31,7 +31,7 @@ class TestProvider implements ExpressionFunctionProviderInterface
             ExpressionFunction::fromPhp('\strtolower'),
 
             ExpressionFunction::fromPhp('Symfony\Component\ExpressionLanguage\Tests\Fixtures\fn_namespaced', 'fn_namespaced'),
-        );
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
index 16bf450862..ba35e7d19a 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/LexerTest.php
@@ -59,33 +59,33 @@ class LexerTest extends TestCase
 
     public function getTokenizeData()
     {
-        return array(
-            array(
-                array(new Token('name', 'a', 3)),
+        return [
+            [
+                [new Token('name', 'a', 3)],
                 '  a  ',
-            ),
-            array(
-                array(new Token('name', 'a', 1)),
+            ],
+            [
+                [new Token('name', 'a', 1)],
                 'a',
-            ),
-            array(
-                array(new Token('string', 'foo', 1)),
+            ],
+            [
+                [new Token('string', 'foo', 1)],
                 '"foo"',
-            ),
-            array(
-                array(new Token('number', '3', 1)),
+            ],
+            [
+                [new Token('number', '3', 1)],
                 '3',
-            ),
-            array(
-                array(new Token('operator', '+', 1)),
+            ],
+            [
+                [new Token('operator', '+', 1)],
                 '+',
-            ),
-            array(
-                array(new Token('punctuation', '.', 1)),
+            ],
+            [
+                [new Token('punctuation', '.', 1)],
                 '.',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     new Token('punctuation', '(', 1),
                     new Token('number', '3', 2),
                     new Token('operator', '+', 4),
@@ -101,21 +101,21 @@ class LexerTest extends TestCase
                     new Token('punctuation', '[', 25),
                     new Token('number', '4', 26),
                     new Token('punctuation', ']', 27),
-                ),
+                ],
                 '(3 + 5) ~ foo("bar").baz[4]',
-            ),
-            array(
-                array(new Token('operator', '..', 1)),
+            ],
+            [
+                [new Token('operator', '..', 1)],
                 '..',
-            ),
-            array(
-                array(new Token('string', '#foo', 1)),
+            ],
+            [
+                [new Token('string', '#foo', 1)],
                 "'#foo'",
-            ),
-            array(
-                array(new Token('string', '#foo', 1)),
+            ],
+            [
+                [new Token('string', '#foo', 1)],
                 '"#foo"',
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
index a6f80c2f69..297503746e 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/AbstractNodeTest.php
@@ -19,7 +19,7 @@ abstract class AbstractNodeTest extends TestCase
     /**
      * @dataProvider getEvaluateData
      */
-    public function testEvaluate($expected, $node, $variables = array(), $functions = array())
+    public function testEvaluate($expected, $node, $variables = [], $functions = [])
     {
         $this->assertSame($expected, $node->evaluate($functions, $variables));
     }
@@ -29,7 +29,7 @@ abstract class AbstractNodeTest extends TestCase
     /**
      * @dataProvider getCompileData
      */
-    public function testCompile($expected, $node, $functions = array())
+    public function testCompile($expected, $node, $functions = [])
     {
         $compiler = new Compiler($functions);
         $node->compile($compiler);
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArgumentsNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArgumentsNodeTest.php
index 60a6d1ca2a..9d88b4ae75 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArgumentsNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArgumentsNodeTest.php
@@ -17,16 +17,16 @@ class ArgumentsNodeTest extends ArrayNodeTest
 {
     public function getCompileData()
     {
-        return array(
-            array('"a", "b"', $this->getArrayNode()),
-        );
+        return [
+            ['"a", "b"', $this->getArrayNode()],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('"a", "b"', $this->getArrayNode()),
-        );
+        return [
+            ['"a", "b"', $this->getArrayNode()],
+        ];
     }
 
     protected function createArrayNode()
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArrayNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArrayNodeTest.php
index 11a35d461c..3d03d837e9 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArrayNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ArrayNodeTest.php
@@ -30,31 +30,31 @@ class ArrayNodeTest extends AbstractNodeTest
 
     public function getEvaluateData()
     {
-        return array(
-            array(array('b' => 'a', 'b'), $this->getArrayNode()),
-        );
+        return [
+            [['b' => 'a', 'b'], $this->getArrayNode()],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('array("b" => "a", 0 => "b")', $this->getArrayNode()),
-        );
+        return [
+            ['["b" => "a", 0 => "b"]', $this->getArrayNode()],
+        ];
     }
 
     public function getDumpData()
     {
-        yield array('{"b": "a", 0: "b"}', $this->getArrayNode());
+        yield ['{"b": "a", 0: "b"}', $this->getArrayNode()];
 
         $array = $this->createArrayNode();
         $array->addElement(new ConstantNode('c'), new ConstantNode('a"b'));
         $array->addElement(new ConstantNode('d'), new ConstantNode('a\b'));
-        yield array('{"a\\"b": "c", "a\\\\b": "d"}', $array);
+        yield ['{"a\\"b": "c", "a\\\\b": "d"}', $array];
 
         $array = $this->createArrayNode();
         $array->addElement(new ConstantNode('c'));
         $array->addElement(new ConstantNode('d'));
-        yield array('["c", "d"]', $array);
+        yield ['["c", "d"]', $array];
     }
 
     protected function getArrayNode()
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
index f8456f8dbb..b45a1e57b9 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/BinaryNodeTest.php
@@ -23,47 +23,47 @@ class BinaryNodeTest extends AbstractNodeTest
         $array->addElement(new ConstantNode('a'));
         $array->addElement(new ConstantNode('b'));
 
-        return array(
-            array(true, new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))),
-            array(true, new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))),
-            array(false, new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))),
-            array(false, new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))),
+        return [
+            [true, new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))],
+            [true, new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))],
+            [false, new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))],
+            [false, new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))],
 
-            array(0, new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))),
-            array(6, new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))),
-            array(6, new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))),
+            [0, new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))],
+            [6, new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))],
+            [6, new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))],
 
-            array(true, new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))),
-            array(true, new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))),
-            array(true, new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))),
+            [true, new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))],
+            [true, new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))],
+            [true, new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))],
 
-            array(false, new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))),
-            array(false, new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))),
-            array(true, new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))),
+            [false, new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))],
+            [false, new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))],
+            [true, new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))],
 
-            array(true, new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))),
-            array(false, new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))),
+            [true, new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))],
+            [false, new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))],
 
-            array(false, new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))),
-            array(true, new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))),
+            [false, new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))],
+            [true, new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))],
 
-            array(-1, new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))),
-            array(3, new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))),
-            array(4, new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))),
-            array(1, new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))),
-            array(1, new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))),
-            array(25, new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))),
-            array('ab', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))),
+            [-1, new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))],
+            [3, new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))],
+            [4, new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))],
+            [1, new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))],
+            [1, new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))],
+            [25, new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))],
+            ['ab', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))],
 
-            array(true, new BinaryNode('in', new ConstantNode('a'), $array)),
-            array(false, new BinaryNode('in', new ConstantNode('c'), $array)),
-            array(true, new BinaryNode('not in', new ConstantNode('c'), $array)),
-            array(false, new BinaryNode('not in', new ConstantNode('a'), $array)),
+            [true, new BinaryNode('in', new ConstantNode('a'), $array)],
+            [false, new BinaryNode('in', new ConstantNode('c'), $array)],
+            [true, new BinaryNode('not in', new ConstantNode('c'), $array)],
+            [false, new BinaryNode('not in', new ConstantNode('a'), $array)],
 
-            array(array(1, 2, 3), new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))),
+            [[1, 2, 3], new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))],
 
-            array(1, new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+$/'))),
-        );
+            [1, new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+$/'))],
+        ];
     }
 
     public function getCompileData()
@@ -72,47 +72,47 @@ class BinaryNodeTest extends AbstractNodeTest
         $array->addElement(new ConstantNode('a'));
         $array->addElement(new ConstantNode('b'));
 
-        return array(
-            array('(true || false)', new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))),
-            array('(true || false)', new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))),
-            array('(true && false)', new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))),
-            array('(true && false)', new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))),
+        return [
+            ['(true || false)', new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))],
+            ['(true || false)', new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))],
+            ['(true && false)', new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))],
+            ['(true && false)', new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))],
 
-            array('(2 & 4)', new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))),
-            array('(2 | 4)', new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))),
-            array('(2 ^ 4)', new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))),
+            ['(2 & 4)', new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))],
+            ['(2 | 4)', new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))],
+            ['(2 ^ 4)', new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))],
 
-            array('(1 < 2)', new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 <= 2)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 <= 1)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))),
+            ['(1 < 2)', new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 <= 2)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 <= 1)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))],
 
-            array('(1 > 2)', new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 >= 2)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 >= 1)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))),
+            ['(1 > 2)', new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 >= 2)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 >= 1)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))],
 
-            array('(true === true)', new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))),
-            array('(true !== true)', new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))),
+            ['(true === true)', new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))],
+            ['(true !== true)', new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))],
 
-            array('(2 == 1)', new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))),
-            array('(2 != 1)', new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))),
+            ['(2 == 1)', new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))],
+            ['(2 != 1)', new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))],
 
-            array('(1 - 2)', new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 + 2)', new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))),
-            array('(2 * 2)', new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))),
-            array('(2 / 2)', new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))),
-            array('(5 % 2)', new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))),
-            array('pow(5, 2)', new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))),
-            array('("a" . "b")', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))),
+            ['(1 - 2)', new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 + 2)', new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))],
+            ['(2 * 2)', new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))],
+            ['(2 / 2)', new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))],
+            ['(5 % 2)', new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))],
+            ['pow(5, 2)', new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))],
+            ['("a" . "b")', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))],
 
-            array('in_array("a", array(0 => "a", 1 => "b"))', new BinaryNode('in', new ConstantNode('a'), $array)),
-            array('in_array("c", array(0 => "a", 1 => "b"))', new BinaryNode('in', new ConstantNode('c'), $array)),
-            array('!in_array("c", array(0 => "a", 1 => "b"))', new BinaryNode('not in', new ConstantNode('c'), $array)),
-            array('!in_array("a", array(0 => "a", 1 => "b"))', new BinaryNode('not in', new ConstantNode('a'), $array)),
+            ['in_array("a", [0 => "a", 1 => "b"])', new BinaryNode('in', new ConstantNode('a'), $array)],
+            ['in_array("c", [0 => "a", 1 => "b"])', new BinaryNode('in', new ConstantNode('c'), $array)],
+            ['!in_array("c", [0 => "a", 1 => "b"])', new BinaryNode('not in', new ConstantNode('c'), $array)],
+            ['!in_array("a", [0 => "a", 1 => "b"])', new BinaryNode('not in', new ConstantNode('a'), $array)],
 
-            array('range(1, 3)', new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))),
+            ['range(1, 3)', new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))],
 
-            array('preg_match("/^[a-z]+/i\$/", "abc")', new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+/i$/'))),
-        );
+            ['preg_match("/^[a-z]+/i\$/", "abc")', new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+/i$/'))],
+        ];
     }
 
     public function getDumpData()
@@ -121,46 +121,46 @@ class BinaryNodeTest extends AbstractNodeTest
         $array->addElement(new ConstantNode('a'));
         $array->addElement(new ConstantNode('b'));
 
-        return array(
-            array('(true or false)', new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))),
-            array('(true || false)', new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))),
-            array('(true and false)', new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))),
-            array('(true && false)', new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))),
+        return [
+            ['(true or false)', new BinaryNode('or', new ConstantNode(true), new ConstantNode(false))],
+            ['(true || false)', new BinaryNode('||', new ConstantNode(true), new ConstantNode(false))],
+            ['(true and false)', new BinaryNode('and', new ConstantNode(true), new ConstantNode(false))],
+            ['(true && false)', new BinaryNode('&&', new ConstantNode(true), new ConstantNode(false))],
 
-            array('(2 & 4)', new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))),
-            array('(2 | 4)', new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))),
-            array('(2 ^ 4)', new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))),
+            ['(2 & 4)', new BinaryNode('&', new ConstantNode(2), new ConstantNode(4))],
+            ['(2 | 4)', new BinaryNode('|', new ConstantNode(2), new ConstantNode(4))],
+            ['(2 ^ 4)', new BinaryNode('^', new ConstantNode(2), new ConstantNode(4))],
 
-            array('(1 < 2)', new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 <= 2)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 <= 1)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))),
+            ['(1 < 2)', new BinaryNode('<', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 <= 2)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 <= 1)', new BinaryNode('<=', new ConstantNode(1), new ConstantNode(1))],
 
-            array('(1 > 2)', new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 >= 2)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 >= 1)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))),
+            ['(1 > 2)', new BinaryNode('>', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 >= 2)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 >= 1)', new BinaryNode('>=', new ConstantNode(1), new ConstantNode(1))],
 
-            array('(true === true)', new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))),
-            array('(true !== true)', new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))),
+            ['(true === true)', new BinaryNode('===', new ConstantNode(true), new ConstantNode(true))],
+            ['(true !== true)', new BinaryNode('!==', new ConstantNode(true), new ConstantNode(true))],
 
-            array('(2 == 1)', new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))),
-            array('(2 != 1)', new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))),
+            ['(2 == 1)', new BinaryNode('==', new ConstantNode(2), new ConstantNode(1))],
+            ['(2 != 1)', new BinaryNode('!=', new ConstantNode(2), new ConstantNode(1))],
 
-            array('(1 - 2)', new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))),
-            array('(1 + 2)', new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))),
-            array('(2 * 2)', new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))),
-            array('(2 / 2)', new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))),
-            array('(5 % 2)', new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))),
-            array('(5 ** 2)', new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))),
-            array('("a" ~ "b")', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))),
+            ['(1 - 2)', new BinaryNode('-', new ConstantNode(1), new ConstantNode(2))],
+            ['(1 + 2)', new BinaryNode('+', new ConstantNode(1), new ConstantNode(2))],
+            ['(2 * 2)', new BinaryNode('*', new ConstantNode(2), new ConstantNode(2))],
+            ['(2 / 2)', new BinaryNode('/', new ConstantNode(2), new ConstantNode(2))],
+            ['(5 % 2)', new BinaryNode('%', new ConstantNode(5), new ConstantNode(2))],
+            ['(5 ** 2)', new BinaryNode('**', new ConstantNode(5), new ConstantNode(2))],
+            ['("a" ~ "b")', new BinaryNode('~', new ConstantNode('a'), new ConstantNode('b'))],
 
-            array('("a" in ["a", "b"])', new BinaryNode('in', new ConstantNode('a'), $array)),
-            array('("c" in ["a", "b"])', new BinaryNode('in', new ConstantNode('c'), $array)),
-            array('("c" not in ["a", "b"])', new BinaryNode('not in', new ConstantNode('c'), $array)),
-            array('("a" not in ["a", "b"])', new BinaryNode('not in', new ConstantNode('a'), $array)),
+            ['("a" in ["a", "b"])', new BinaryNode('in', new ConstantNode('a'), $array)],
+            ['("c" in ["a", "b"])', new BinaryNode('in', new ConstantNode('c'), $array)],
+            ['("c" not in ["a", "b"])', new BinaryNode('not in', new ConstantNode('c'), $array)],
+            ['("a" not in ["a", "b"])', new BinaryNode('not in', new ConstantNode('a'), $array)],
 
-            array('(1 .. 3)', new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))),
+            ['(1 .. 3)', new BinaryNode('..', new ConstantNode(1), new ConstantNode(3))],
 
-            array('("abc" matches "/^[a-z]+/i$/")', new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+/i$/'))),
-        );
+            ['("abc" matches "/^[a-z]+/i$/")', new BinaryNode('matches', new ConstantNode('abc'), new ConstantNode('/^[a-z]+/i$/'))],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConditionalNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConditionalNodeTest.php
index cbf9e8d43c..13b7cbdec1 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConditionalNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConditionalNodeTest.php
@@ -18,25 +18,25 @@ class ConditionalNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array(1, new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))),
-            array(2, new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))),
-        );
+        return [
+            [1, new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))],
+            [2, new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('((true) ? (1) : (2))', new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))),
-            array('((false) ? (1) : (2))', new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))),
-        );
+        return [
+            ['((true) ? (1) : (2))', new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))],
+            ['((false) ? (1) : (2))', new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('(true ? 1 : 2)', new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))),
-            array('(false ? 1 : 2)', new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))),
-        );
+        return [
+            ['(true ? 1 : 2)', new ConditionalNode(new ConstantNode(true), new ConstantNode(1), new ConstantNode(2))],
+            ['(false ? 1 : 2)', new ConditionalNode(new ConstantNode(false), new ConstantNode(1), new ConstantNode(2))],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConstantNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConstantNodeTest.php
index af79a91c5c..fee9f5bff4 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConstantNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/ConstantNodeTest.php
@@ -17,44 +17,44 @@ class ConstantNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array(false, new ConstantNode(false)),
-            array(true, new ConstantNode(true)),
-            array(null, new ConstantNode(null)),
-            array(3, new ConstantNode(3)),
-            array(3.3, new ConstantNode(3.3)),
-            array('foo', new ConstantNode('foo')),
-            array(array(1, 'b' => 'a'), new ConstantNode(array(1, 'b' => 'a'))),
-        );
+        return [
+            [false, new ConstantNode(false)],
+            [true, new ConstantNode(true)],
+            [null, new ConstantNode(null)],
+            [3, new ConstantNode(3)],
+            [3.3, new ConstantNode(3.3)],
+            ['foo', new ConstantNode('foo')],
+            [[1, 'b' => 'a'], new ConstantNode([1, 'b' => 'a'])],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('false', new ConstantNode(false)),
-            array('true', new ConstantNode(true)),
-            array('null', new ConstantNode(null)),
-            array('3', new ConstantNode(3)),
-            array('3.3', new ConstantNode(3.3)),
-            array('"foo"', new ConstantNode('foo')),
-            array('array(0 => 1, "b" => "a")', new ConstantNode(array(1, 'b' => 'a'))),
-        );
+        return [
+            ['false', new ConstantNode(false)],
+            ['true', new ConstantNode(true)],
+            ['null', new ConstantNode(null)],
+            ['3', new ConstantNode(3)],
+            ['3.3', new ConstantNode(3.3)],
+            ['"foo"', new ConstantNode('foo')],
+            ['[0 => 1, "b" => "a"]', new ConstantNode([1, 'b' => 'a'])],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('false', new ConstantNode(false)),
-            array('true', new ConstantNode(true)),
-            array('null', new ConstantNode(null)),
-            array('3', new ConstantNode(3)),
-            array('3.3', new ConstantNode(3.3)),
-            array('"foo"', new ConstantNode('foo')),
-            array('foo', new ConstantNode('foo', true)),
-            array('{0: 1, "b": "a", 1: true}', new ConstantNode(array(1, 'b' => 'a', true))),
-            array('{"a\\"b": "c", "a\\\\b": "d"}', new ConstantNode(array('a"b' => 'c', 'a\\b' => 'd'))),
-            array('["c", "d"]', new ConstantNode(array('c', 'd'))),
-            array('{"a": ["b"]}', new ConstantNode(array('a' => array('b')))),
-        );
+        return [
+            ['false', new ConstantNode(false)],
+            ['true', new ConstantNode(true)],
+            ['null', new ConstantNode(null)],
+            ['3', new ConstantNode(3)],
+            ['3.3', new ConstantNode(3.3)],
+            ['"foo"', new ConstantNode('foo')],
+            ['foo', new ConstantNode('foo', true)],
+            ['{0: 1, "b": "a", 1: true}', new ConstantNode([1, 'b' => 'a', true])],
+            ['{"a\\"b": "c", "a\\\\b": "d"}', new ConstantNode(['a"b' => 'c', 'a\\b' => 'd'])],
+            ['["c", "d"]', new ConstantNode(['c', 'd'])],
+            ['{"a": ["b"]}', new ConstantNode(['a' => ['b']])],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/FunctionNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/FunctionNodeTest.php
index 3bddc5e564..c6cb02c1b9 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/FunctionNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/FunctionNodeTest.php
@@ -19,34 +19,34 @@ class FunctionNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array('bar', new FunctionNode('foo', new Node(array(new ConstantNode('bar')))), array(), array('foo' => $this->getCallables())),
-        );
+        return [
+            ['bar', new FunctionNode('foo', new Node([new ConstantNode('bar')])), [], ['foo' => $this->getCallables()]],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('foo("bar")', new FunctionNode('foo', new Node(array(new ConstantNode('bar')))), array('foo' => $this->getCallables())),
-        );
+        return [
+            ['foo("bar")', new FunctionNode('foo', new Node([new ConstantNode('bar')])), ['foo' => $this->getCallables()]],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('foo("bar")', new FunctionNode('foo', new Node(array(new ConstantNode('bar')))), array('foo' => $this->getCallables())),
-        );
+        return [
+            ['foo("bar")', new FunctionNode('foo', new Node([new ConstantNode('bar')])), ['foo' => $this->getCallables()]],
+        ];
     }
 
     protected function getCallables()
     {
-        return array(
+        return [
             'compiler' => function ($arg) {
                 return sprintf('foo(%s)', $arg);
             },
             'evaluator' => function ($variables, $arg) {
                 return $arg;
             },
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/GetAttrNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/GetAttrNodeTest.php
index 750acaf93e..c790f33acc 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/GetAttrNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/GetAttrNodeTest.php
@@ -20,41 +20,41 @@ class GetAttrNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array('b', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), array('foo' => array('b' => 'a', 'b'))),
-            array('a', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), array('foo' => array('b' => 'a', 'b'))),
+        return [
+            ['b', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), ['foo' => ['b' => 'a', 'b']]],
+            ['a', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), ['foo' => ['b' => 'a', 'b']]],
 
-            array('bar', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), array('foo' => new Obj())),
+            ['bar', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), ['foo' => new Obj()]],
 
-            array('baz', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), array('foo' => new Obj())),
-            array('a', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), array('foo' => array('b' => 'a', 'b'), 'index' => 'b')),
-        );
+            ['baz', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), ['foo' => new Obj()]],
+            ['a', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL), ['foo' => ['b' => 'a', 'b'], 'index' => 'b']],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('$foo[0]', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
-            array('$foo["b"]', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
+        return [
+            ['$foo[0]', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
+            ['$foo["b"]', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
 
-            array('$foo->foo', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), array('foo' => new Obj())),
+            ['$foo->foo', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), ['foo' => new Obj()]],
 
-            array('$foo->foo(array("b" => "a", 0 => "b"))', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), array('foo' => new Obj())),
-            array('$foo[$index]', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
-        );
+            ['$foo->foo(["b" => "a", 0 => "b"])', new GetAttrNode(new NameNode('foo'), new ConstantNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), ['foo' => new Obj()]],
+            ['$foo[$index]', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('foo[0]', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
-            array('foo["b"]', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
+        return [
+            ['foo[0]', new GetAttrNode(new NameNode('foo'), new ConstantNode(0), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
+            ['foo["b"]', new GetAttrNode(new NameNode('foo'), new ConstantNode('b'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
 
-            array('foo.foo', new GetAttrNode(new NameNode('foo'), new NameNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), array('foo' => new Obj())),
+            ['foo.foo', new GetAttrNode(new NameNode('foo'), new NameNode('foo'), $this->getArrayNode(), GetAttrNode::PROPERTY_CALL), ['foo' => new Obj()]],
 
-            array('foo.foo({"b": "a", 0: "b"})', new GetAttrNode(new NameNode('foo'), new NameNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), array('foo' => new Obj())),
-            array('foo[index]', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)),
-        );
+            ['foo.foo({"b": "a", 0: "b"})', new GetAttrNode(new NameNode('foo'), new NameNode('foo'), $this->getArrayNode(), GetAttrNode::METHOD_CALL), ['foo' => new Obj()]],
+            ['foo[index]', new GetAttrNode(new NameNode('foo'), new NameNode('index'), $this->getArrayNode(), GetAttrNode::ARRAY_CALL)],
+        ];
     }
 
     protected function getArrayNode()
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NameNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NameNodeTest.php
index 5fa2c37f29..a30c27b804 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NameNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NameNodeTest.php
@@ -17,22 +17,22 @@ class NameNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array('bar', new NameNode('foo'), array('foo' => 'bar')),
-        );
+        return [
+            ['bar', new NameNode('foo'), ['foo' => 'bar']],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('$foo', new NameNode('foo')),
-        );
+        return [
+            ['$foo', new NameNode('foo')],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('foo', new NameNode('foo')),
-        );
+        return [
+            ['foo', new NameNode('foo')],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
index 140f152134..351da05144 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/NodeTest.php
@@ -19,7 +19,7 @@ class NodeTest extends TestCase
 {
     public function testToString()
     {
-        $node = new Node(array(new ConstantNode('foo')));
+        $node = new Node([new ConstantNode('foo')]);
 
         $this->assertEquals(<<<'EOF'
 Node(
@@ -31,7 +31,7 @@ EOF
 
     public function testSerialization()
     {
-        $node = new Node(array('foo' => 'bar'), array('bar' => 'foo'));
+        $node = new Node(['foo' => 'bar'], ['bar' => 'foo']);
 
         $serializedNode = serialize($node);
         $unserializedNode = unserialize($serializedNode);
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/Node/UnaryNodeTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/Node/UnaryNodeTest.php
index ef072cb6ec..bac75d24dc 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/Node/UnaryNodeTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/Node/UnaryNodeTest.php
@@ -18,31 +18,31 @@ class UnaryNodeTest extends AbstractNodeTest
 {
     public function getEvaluateData()
     {
-        return array(
-            array(-1, new UnaryNode('-', new ConstantNode(1))),
-            array(3, new UnaryNode('+', new ConstantNode(3))),
-            array(false, new UnaryNode('!', new ConstantNode(true))),
-            array(false, new UnaryNode('not', new ConstantNode(true))),
-        );
+        return [
+            [-1, new UnaryNode('-', new ConstantNode(1))],
+            [3, new UnaryNode('+', new ConstantNode(3))],
+            [false, new UnaryNode('!', new ConstantNode(true))],
+            [false, new UnaryNode('not', new ConstantNode(true))],
+        ];
     }
 
     public function getCompileData()
     {
-        return array(
-            array('(-1)', new UnaryNode('-', new ConstantNode(1))),
-            array('(+3)', new UnaryNode('+', new ConstantNode(3))),
-            array('(!true)', new UnaryNode('!', new ConstantNode(true))),
-            array('(!true)', new UnaryNode('not', new ConstantNode(true))),
-        );
+        return [
+            ['(-1)', new UnaryNode('-', new ConstantNode(1))],
+            ['(+3)', new UnaryNode('+', new ConstantNode(3))],
+            ['(!true)', new UnaryNode('!', new ConstantNode(true))],
+            ['(!true)', new UnaryNode('not', new ConstantNode(true))],
+        ];
     }
 
     public function getDumpData()
     {
-        return array(
-            array('(- 1)', new UnaryNode('-', new ConstantNode(1))),
-            array('(+ 3)', new UnaryNode('+', new ConstantNode(3))),
-            array('(! true)', new UnaryNode('!', new ConstantNode(true))),
-            array('(not true)', new UnaryNode('not', new ConstantNode(true))),
-        );
+        return [
+            ['(- 1)', new UnaryNode('-', new ConstantNode(1))],
+            ['(+ 3)', new UnaryNode('+', new ConstantNode(3))],
+            ['(! true)', new UnaryNode('!', new ConstantNode(true))],
+            ['(not true)', new UnaryNode('not', new ConstantNode(true))],
+        ];
     }
 }
diff --git a/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php b/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
index 1e9ffba21e..d030600fe8 100644
--- a/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
+++ b/src/Symfony/Component/ExpressionLanguage/Tests/ParserTest.php
@@ -25,7 +25,7 @@ class ParserTest extends TestCase
     public function testParseWithInvalidName()
     {
         $lexer = new Lexer();
-        $parser = new Parser(array());
+        $parser = new Parser([]);
         $parser->parse($lexer->tokenize('foo'));
     }
 
@@ -36,17 +36,17 @@ class ParserTest extends TestCase
     public function testParseWithZeroInNames()
     {
         $lexer = new Lexer();
-        $parser = new Parser(array());
-        $parser->parse($lexer->tokenize('foo'), array(0));
+        $parser = new Parser([]);
+        $parser->parse($lexer->tokenize('foo'), [0]);
     }
 
     /**
      * @dataProvider getParseData
      */
-    public function testParse($node, $expression, $names = array())
+    public function testParse($node, $expression, $names = [])
     {
         $lexer = new Lexer();
-        $parser = new Parser(array());
+        $parser = new Parser([]);
         $this->assertEquals($node, $parser->parse($lexer->tokenize($expression), $names));
     }
 
@@ -57,63 +57,63 @@ class ParserTest extends TestCase
         $arguments->addElement(new Node\ConstantNode(2));
         $arguments->addElement(new Node\ConstantNode(true));
 
-        return array(
-            array(
+        return [
+            [
                 new Node\NameNode('a'),
                 'a',
-                array('a'),
-            ),
-            array(
+                ['a'],
+            ],
+            [
                 new Node\ConstantNode('a'),
                 '"a"',
-            ),
-            array(
+            ],
+            [
                 new Node\ConstantNode(3),
                 '3',
-            ),
-            array(
+            ],
+            [
                 new Node\ConstantNode(false),
                 'false',
-            ),
-            array(
+            ],
+            [
                 new Node\ConstantNode(true),
                 'true',
-            ),
-            array(
+            ],
+            [
                 new Node\ConstantNode(null),
                 'null',
-            ),
-            array(
+            ],
+            [
                 new Node\UnaryNode('-', new Node\ConstantNode(3)),
                 '-3',
-            ),
-            array(
+            ],
+            [
                 new Node\BinaryNode('-', new Node\ConstantNode(3), new Node\ConstantNode(3)),
                 '3 - 3',
-            ),
-            array(
+            ],
+            [
                 new Node\BinaryNode('*',
                     new Node\BinaryNode('-', new Node\ConstantNode(3), new Node\ConstantNode(3)),
                     new Node\ConstantNode(2)
                 ),
                 '(3 - 3) * 2',
-            ),
-            array(
+            ],
+            [
                 new Node\GetAttrNode(new Node\NameNode('foo'), new Node\ConstantNode('bar', true), new Node\ArgumentsNode(), Node\GetAttrNode::PROPERTY_CALL),
                 'foo.bar',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 new Node\GetAttrNode(new Node\NameNode('foo'), new Node\ConstantNode('bar', true), new Node\ArgumentsNode(), Node\GetAttrNode::METHOD_CALL),
                 'foo.bar()',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 new Node\GetAttrNode(new Node\NameNode('foo'), new Node\ConstantNode('not', true), new Node\ArgumentsNode(), Node\GetAttrNode::METHOD_CALL),
                 'foo.not()',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 new Node\GetAttrNode(
                     new Node\NameNode('foo'),
                     new Node\ConstantNode('bar', true),
@@ -121,24 +121,24 @@ class ParserTest extends TestCase
                     Node\GetAttrNode::METHOD_CALL
                 ),
                 'foo.bar("arg1", 2, true)',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 new Node\GetAttrNode(new Node\NameNode('foo'), new Node\ConstantNode(3), new Node\ArgumentsNode(), Node\GetAttrNode::ARRAY_CALL),
                 'foo[3]',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 new Node\ConditionalNode(new Node\ConstantNode(true), new Node\ConstantNode(true), new Node\ConstantNode(false)),
                 'true ? true : false',
-            ),
-            array(
+            ],
+            [
                 new Node\BinaryNode('matches', new Node\ConstantNode('foo'), new Node\ConstantNode('/foo/')),
                 '"foo" matches "/foo/"',
-            ),
+            ],
 
             // chained calls
-            array(
+            [
                 $this->createGetAttrNode(
                     $this->createGetAttrNode(
                         $this->createGetAttrNode(
@@ -147,15 +147,15 @@ class ParserTest extends TestCase
                         'baz', Node\GetAttrNode::PROPERTY_CALL),
                     '3', Node\GetAttrNode::ARRAY_CALL),
                 'foo.bar().foo().baz[3]',
-                array('foo'),
-            ),
+                ['foo'],
+            ],
 
-            array(
+            [
                 new Node\NameNode('foo'),
                 'bar',
-                array('foo' => 'bar'),
-            ),
-        );
+                ['foo' => 'bar'],
+            ],
+        ];
     }
 
     private function createGetAttrNode($node, $item, $type)
@@ -167,33 +167,33 @@ class ParserTest extends TestCase
      * @dataProvider getInvalidPostfixData
      * @expectedException \Symfony\Component\ExpressionLanguage\SyntaxError
      */
-    public function testParseWithInvalidPostfixData($expr, $names = array())
+    public function testParseWithInvalidPostfixData($expr, $names = [])
     {
         $lexer = new Lexer();
-        $parser = new Parser(array());
+        $parser = new Parser([]);
         $parser->parse($lexer->tokenize($expr), $names);
     }
 
     public function getInvalidPostfixData()
     {
-        return array(
-            array(
+        return [
+            [
                 'foo."#"',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 'foo."bar"',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 'foo.**',
-                array('foo'),
-            ),
-            array(
+                ['foo'],
+            ],
+            [
                 'foo.123',
-                array('foo'),
-            ),
-        );
+                ['foo'],
+            ],
+        ];
     }
 
     /**
@@ -203,8 +203,8 @@ class ParserTest extends TestCase
     public function testNameProposal()
     {
         $lexer = new Lexer();
-        $parser = new Parser(array());
+        $parser = new Parser([]);
 
-        $parser->parse($lexer->tokenize('foo > bar'), array('foo', 'baz'));
+        $parser->parse($lexer->tokenize('foo > bar'), ['foo', 'baz']);
     }
 }
diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index 2d703843dc..4c87b11a5b 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -59,7 +59,7 @@ class Filesystem
             }
 
             // Stream context created to allow files overwrite when using FTP stream wrapper - disabled by default
-            if (false === $target = @fopen($targetFile, 'w', null, stream_context_create(array('ftp' => array('overwrite' => true))))) {
+            if (false === $target = @fopen($targetFile, 'w', null, stream_context_create(['ftp' => ['overwrite' => true]]))) {
                 throw new IOException(sprintf('Failed to copy "%s" to "%s" because target file could not be opened for writing.', $originFile, $targetFile), 0, null, $originFile);
             }
 
@@ -165,7 +165,7 @@ class Filesystem
         if ($files instanceof \Traversable) {
             $files = iterator_to_array($files, false);
         } elseif (!\is_array($files)) {
-            $files = array($files);
+            $files = [$files];
         }
         $files = array_reverse($files);
         foreach ($files as $file) {
@@ -282,7 +282,7 @@ class Filesystem
         if (true !== @rename($origin, $target)) {
             if (is_dir($origin)) {
                 // See https://bugs.php.net/bug.php?id=54097 & http://php.net/manual/en/function.rename.php#113943
-                $this->mirror($origin, $target, null, array('override' => $overwrite, 'delete' => $overwrite));
+                $this->mirror($origin, $target, null, ['override' => $overwrite, 'delete' => $overwrite]);
                 $this->remove($origin);
 
                 return;
@@ -476,7 +476,7 @@ class Filesystem
         $endPathArr = explode('/', trim($endPath, '/'));
 
         $normalizePathArray = function ($pathSegments) {
-            $result = array();
+            $result = [];
 
             foreach ($pathSegments as $segment) {
                 if ('..' === $segment) {
@@ -535,7 +535,7 @@ class Filesystem
      *
      * @throws IOException When file type is unknown
      */
-    public function mirror($originDir, $targetDir, \Traversable $iterator = null, $options = array())
+    public function mirror($originDir, $targetDir, \Traversable $iterator = null, $options = [])
     {
         $targetDir = rtrim($targetDir, '/\\');
         $originDir = rtrim($originDir, '/\\');
@@ -727,17 +727,17 @@ class Filesystem
 
     private function toIterable($files): iterable
     {
-        return \is_array($files) || $files instanceof \Traversable ? $files : array($files);
+        return \is_array($files) || $files instanceof \Traversable ? $files : [$files];
     }
 
     /**
-     * Gets a 2-tuple of scheme (may be null) and hierarchical part of a filename (e.g. file:///tmp -> array(file, tmp)).
+     * Gets a 2-tuple of scheme (may be null) and hierarchical part of a filename (e.g. file:///tmp -> [file, tmp]).
      */
     private function getSchemeAndHierarchy(string $filename): array
     {
         $components = explode('://', $filename, 2);
 
-        return 2 === \count($components) ? array($components[0], $components[1]) : array(null, $components[0]);
+        return 2 === \count($components) ? [$components[0], $components[1]] : [null, $components[0]];
     }
 
     private static function box($func)
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
index 521c16b710..8ad94a1e28 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTest.php
@@ -197,9 +197,9 @@ class FilesystemTest extends FilesystemTestCase
     public function testMkdirCreatesDirectoriesFromArray()
     {
         $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
-        $directories = array(
+        $directories = [
             $basePath.'1', $basePath.'2', $basePath.'3',
-        );
+        ];
 
         $this->filesystem->mkdir($directories);
 
@@ -211,9 +211,9 @@ class FilesystemTest extends FilesystemTestCase
     public function testMkdirCreatesDirectoriesFromTraversableObject()
     {
         $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
-        $directories = new \ArrayObject(array(
+        $directories = new \ArrayObject([
             $basePath.'1', $basePath.'2', $basePath.'3',
-        ));
+        ]);
 
         $this->filesystem->mkdir($directories);
 
@@ -257,9 +257,9 @@ class FilesystemTest extends FilesystemTestCase
     public function testTouchCreatesEmptyFilesFromArray()
     {
         $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
-        $files = array(
+        $files = [
             $basePath.'1', $basePath.'2', $basePath.'3',
-        );
+        ];
 
         $this->filesystem->touch($files);
 
@@ -271,9 +271,9 @@ class FilesystemTest extends FilesystemTestCase
     public function testTouchCreatesEmptyFilesFromTraversableObject()
     {
         $basePath = $this->workspace.\DIRECTORY_SEPARATOR;
-        $files = new \ArrayObject(array(
+        $files = new \ArrayObject([
             $basePath.'1', $basePath.'2', $basePath.'3',
-        ));
+        ]);
 
         $this->filesystem->touch($files);
 
@@ -302,9 +302,9 @@ class FilesystemTest extends FilesystemTestCase
         mkdir($basePath.'dir');
         touch($basePath.'file');
 
-        $files = array(
+        $files = [
             $basePath.'dir', $basePath.'file',
-        );
+        ];
 
         $this->filesystem->remove($files);
 
@@ -319,9 +319,9 @@ class FilesystemTest extends FilesystemTestCase
         mkdir($basePath.'dir');
         touch($basePath.'file');
 
-        $files = new \ArrayObject(array(
+        $files = new \ArrayObject([
             $basePath.'dir', $basePath.'file',
-        ));
+        ]);
 
         $this->filesystem->remove($files);
 
@@ -335,9 +335,9 @@ class FilesystemTest extends FilesystemTestCase
 
         mkdir($basePath.'dir');
 
-        $files = array(
+        $files = [
             $basePath.'dir', $basePath.'file',
-        );
+        ];
 
         $this->filesystem->remove($files);
 
@@ -409,9 +409,9 @@ class FilesystemTest extends FilesystemTestCase
         mkdir($basePath.'dir');
         touch($basePath.'file');
 
-        $files = new \ArrayObject(array(
+        $files = new \ArrayObject([
             $basePath.'dir', $basePath.'file',
-        ));
+        ]);
 
         $this->assertTrue($this->filesystem->exists($files));
     }
@@ -424,9 +424,9 @@ class FilesystemTest extends FilesystemTestCase
         touch($basePath.'file');
         touch($basePath.'file2');
 
-        $files = new \ArrayObject(array(
+        $files = new \ArrayObject([
             $basePath.'dir', $basePath.'file', $basePath.'file2',
-        ));
+        ]);
 
         unlink($basePath.'file');
 
@@ -503,7 +503,7 @@ class FilesystemTest extends FilesystemTestCase
 
         $directory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
         $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
-        $files = array($directory, $file);
+        $files = [$directory, $file];
 
         mkdir($directory);
         touch($file);
@@ -520,7 +520,7 @@ class FilesystemTest extends FilesystemTestCase
 
         $directory = $this->workspace.\DIRECTORY_SEPARATOR.'directory';
         $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
-        $files = new \ArrayObject(array($directory, $file));
+        $files = new \ArrayObject([$directory, $file]);
 
         mkdir($directory);
         touch($file);
@@ -975,7 +975,7 @@ class FilesystemTest extends FilesystemTestCase
 
         touch($file);
 
-        $this->filesystem->hardlink($file, array($link1, $link2));
+        $this->filesystem->hardlink($file, [$link1, $link2]);
 
         $this->assertTrue(is_file($link1));
         $this->assertEquals(fileinode($file), fileinode($link1));
@@ -993,7 +993,7 @@ class FilesystemTest extends FilesystemTestCase
         touch($file);
 
         // practically same as testLinkIsNotOverwrittenIfAlreadyCreated
-        $this->filesystem->hardlink($file, array($link, $link));
+        $this->filesystem->hardlink($file, [$link, $link]);
 
         $this->assertTrue(is_file($link));
         $this->assertEquals(fileinode($file), fileinode($link));
@@ -1102,47 +1102,47 @@ class FilesystemTest extends FilesystemTestCase
 
     public function providePathsForMakePathRelative()
     {
-        $paths = array(
-            array('/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component', '../'),
-            array('/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component/', '../'),
-            array('/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component', '../'),
-            array('/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component/', '../'),
-            array('/usr/lib/symfony/', '/var/lib/symfony/src/Symfony/Component', '../../../../../../usr/lib/symfony/'),
-            array('/var/lib/symfony/src/Symfony/', '/var/lib/symfony/', 'src/Symfony/'),
-            array('/aa/bb', '/aa/bb', './'),
-            array('/aa/bb', '/aa/bb/', './'),
-            array('/aa/bb/', '/aa/bb', './'),
-            array('/aa/bb/', '/aa/bb/', './'),
-            array('/aa/bb/cc', '/aa/bb/cc/dd', '../'),
-            array('/aa/bb/cc', '/aa/bb/cc/dd/', '../'),
-            array('/aa/bb/cc/', '/aa/bb/cc/dd', '../'),
-            array('/aa/bb/cc/', '/aa/bb/cc/dd/', '../'),
-            array('/aa/bb/cc', '/aa', 'bb/cc/'),
-            array('/aa/bb/cc', '/aa/', 'bb/cc/'),
-            array('/aa/bb/cc/', '/aa', 'bb/cc/'),
-            array('/aa/bb/cc/', '/aa/', 'bb/cc/'),
-            array('/a/aab/bb', '/a/aa', '../aab/bb/'),
-            array('/a/aab/bb', '/a/aa/', '../aab/bb/'),
-            array('/a/aab/bb/', '/a/aa', '../aab/bb/'),
-            array('/a/aab/bb/', '/a/aa/', '../aab/bb/'),
-            array('/a/aab/bb/', '/', 'a/aab/bb/'),
-            array('/a/aab/bb/', '/b/aab', '../../a/aab/bb/'),
-            array('/aab/bb', '/aa', '../aab/bb/'),
-            array('/aab', '/aa', '../aab/'),
-            array('/aa/bb/cc', '/aa/dd/..', 'bb/cc/'),
-            array('/aa/../bb/cc', '/aa/dd/..', '../bb/cc/'),
-            array('/aa/bb/../../cc', '/aa/../dd/..', 'cc/'),
-            array('/../aa/bb/cc', '/aa/dd/..', 'bb/cc/'),
-            array('/../../aa/../bb/cc', '/aa/dd/..', '../bb/cc/'),
-            array('C:/aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'),
-            array('c:/aa/../bb/cc', 'c:/aa/dd/..', '../bb/cc/'),
-            array('C:/aa/bb/../../cc', 'C:/aa/../dd/..', 'cc/'),
-            array('C:/../aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'),
-            array('C:/../../aa/../bb/cc', 'C:/aa/dd/..', '../bb/cc/'),
-        );
+        $paths = [
+            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component', '../'],
+            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/src/Symfony/Component/', '../'],
+            ['/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component', '../'],
+            ['/var/lib/symfony/src/Symfony', '/var/lib/symfony/src/Symfony/Component/', '../'],
+            ['/usr/lib/symfony/', '/var/lib/symfony/src/Symfony/Component', '../../../../../../usr/lib/symfony/'],
+            ['/var/lib/symfony/src/Symfony/', '/var/lib/symfony/', 'src/Symfony/'],
+            ['/aa/bb', '/aa/bb', './'],
+            ['/aa/bb', '/aa/bb/', './'],
+            ['/aa/bb/', '/aa/bb', './'],
+            ['/aa/bb/', '/aa/bb/', './'],
+            ['/aa/bb/cc', '/aa/bb/cc/dd', '../'],
+            ['/aa/bb/cc', '/aa/bb/cc/dd/', '../'],
+            ['/aa/bb/cc/', '/aa/bb/cc/dd', '../'],
+            ['/aa/bb/cc/', '/aa/bb/cc/dd/', '../'],
+            ['/aa/bb/cc', '/aa', 'bb/cc/'],
+            ['/aa/bb/cc', '/aa/', 'bb/cc/'],
+            ['/aa/bb/cc/', '/aa', 'bb/cc/'],
+            ['/aa/bb/cc/', '/aa/', 'bb/cc/'],
+            ['/a/aab/bb', '/a/aa', '../aab/bb/'],
+            ['/a/aab/bb', '/a/aa/', '../aab/bb/'],
+            ['/a/aab/bb/', '/a/aa', '../aab/bb/'],
+            ['/a/aab/bb/', '/a/aa/', '../aab/bb/'],
+            ['/a/aab/bb/', '/', 'a/aab/bb/'],
+            ['/a/aab/bb/', '/b/aab', '../../a/aab/bb/'],
+            ['/aab/bb', '/aa', '../aab/bb/'],
+            ['/aab', '/aa', '../aab/'],
+            ['/aa/bb/cc', '/aa/dd/..', 'bb/cc/'],
+            ['/aa/../bb/cc', '/aa/dd/..', '../bb/cc/'],
+            ['/aa/bb/../../cc', '/aa/../dd/..', 'cc/'],
+            ['/../aa/bb/cc', '/aa/dd/..', 'bb/cc/'],
+            ['/../../aa/../bb/cc', '/aa/dd/..', '../bb/cc/'],
+            ['C:/aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'],
+            ['c:/aa/../bb/cc', 'c:/aa/dd/..', '../bb/cc/'],
+            ['C:/aa/bb/../../cc', 'C:/aa/../dd/..', 'cc/'],
+            ['C:/../aa/bb/cc', 'C:/aa/dd/..', 'bb/cc/'],
+            ['C:/../../aa/../bb/cc', 'C:/aa/dd/..', '../bb/cc/'],
+        ];
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            $paths[] = array('c:\var\lib/symfony/src/Symfony/', 'c:/var/lib/symfony/', 'src/Symfony/');
+            $paths[] = ['c:\var\lib/symfony/src/Symfony/', 'c:/var/lib/symfony/', 'src/Symfony/'];
         }
 
         return $paths;
@@ -1189,19 +1189,19 @@ class FilesystemTest extends FilesystemTestCase
 
         $this->filesystem->remove($file1);
 
-        $this->filesystem->mirror($sourcePath, $targetPath, null, array('delete' => false));
+        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => false]);
         $this->assertTrue($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));
 
-        $this->filesystem->mirror($sourcePath, $targetPath, null, array('delete' => true));
+        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
         $this->assertFalse($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));
 
         file_put_contents($file1, 'FILE1');
 
-        $this->filesystem->mirror($sourcePath, $targetPath, null, array('delete' => true));
+        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
         $this->assertTrue($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));
 
         $this->filesystem->remove($directory);
-        $this->filesystem->mirror($sourcePath, $targetPath, null, array('delete' => true));
+        $this->filesystem->mirror($sourcePath, $targetPath, null, ['delete' => true]);
         $this->assertFalse($this->filesystem->exists($targetPath.'directory'));
         $this->assertFalse($this->filesystem->exists($targetPath.'directory'.\DIRECTORY_SEPARATOR.'file1'));
     }
@@ -1323,7 +1323,7 @@ class FilesystemTest extends FilesystemTestCase
         $oldPath = getcwd();
         chdir($this->workspace);
 
-        $this->filesystem->mirror('source', 'target', null, array('delete' => true));
+        $this->filesystem->mirror('source', 'target', null, ['delete' => true]);
 
         chdir($oldPath);
 
@@ -1334,21 +1334,21 @@ class FilesystemTest extends FilesystemTestCase
 
     public function testMirrorWithCustomIterator()
     {
-        $sourcePath = $this->workspace.DIRECTORY_SEPARATOR.'source'.DIRECTORY_SEPARATOR;
+        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
         mkdir($sourcePath);
 
-        $file = $sourcePath.DIRECTORY_SEPARATOR.'file';
+        $file = $sourcePath.\DIRECTORY_SEPARATOR.'file';
         file_put_contents($file, 'FILE');
 
-        $targetPath = $this->workspace.DIRECTORY_SEPARATOR.'target'.DIRECTORY_SEPARATOR;
+        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;
 
         $splFile = new \SplFileInfo($file);
-        $iterator = new \ArrayObject(array($splFile));
+        $iterator = new \ArrayObject([$splFile]);
 
         $this->filesystem->mirror($sourcePath, $targetPath, $iterator);
 
         $this->assertTrue(is_dir($targetPath));
-        $this->assertFileEquals($file, $targetPath.DIRECTORY_SEPARATOR.'file');
+        $this->assertFileEquals($file, $targetPath.\DIRECTORY_SEPARATOR.'file');
     }
 
     /**
@@ -1357,17 +1357,17 @@ class FilesystemTest extends FilesystemTestCase
      */
     public function testMirrorWithCustomIteratorWithRelativePath()
     {
-        $sourcePath = $this->workspace.DIRECTORY_SEPARATOR.'source'.DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'source'.DIRECTORY_SEPARATOR;
-        $realSourcePath = $this->workspace.DIRECTORY_SEPARATOR.'source'.DIRECTORY_SEPARATOR;
+        $sourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR.'..'.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
+        $realSourcePath = $this->workspace.\DIRECTORY_SEPARATOR.'source'.\DIRECTORY_SEPARATOR;
         mkdir($realSourcePath);
 
         $file = $realSourcePath.'file';
         file_put_contents($file, 'FILE');
 
-        $targetPath = $this->workspace.DIRECTORY_SEPARATOR.'target'.DIRECTORY_SEPARATOR.'..'.DIRECTORY_SEPARATOR.'target'.DIRECTORY_SEPARATOR;
+        $targetPath = $this->workspace.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR.'..'.\DIRECTORY_SEPARATOR.'target'.\DIRECTORY_SEPARATOR;
 
         $splFile = new \SplFileInfo($file);
-        $iterator = new \ArrayObject(array($splFile));
+        $iterator = new \ArrayObject([$splFile]);
 
         $this->filesystem->mirror($sourcePath, $targetPath, $iterator);
     }
@@ -1384,15 +1384,15 @@ class FilesystemTest extends FilesystemTestCase
 
     public function providePathsForIsAbsolutePath()
     {
-        return array(
-            array('/var/lib', true),
-            array('c:\\\\var\\lib', true),
-            array('\\var\\lib', true),
-            array('var/lib', false),
-            array('../var/lib', false),
-            array('', false),
-            array(null, false),
-        );
+        return [
+            ['/var/lib', true],
+            ['c:\\\\var\\lib', true],
+            ['\\var\\lib', true],
+            ['var/lib', false],
+            ['../var/lib', false],
+            ['', false],
+            [null, false],
+        ];
     }
 
     public function testTempnam()
@@ -1522,7 +1522,7 @@ class FilesystemTest extends FilesystemTestCase
     {
         $filename = $this->workspace.\DIRECTORY_SEPARATOR.'foo'.\DIRECTORY_SEPARATOR.'baz.txt';
 
-        $this->filesystem->dumpFile($filename, array('bar'));
+        $this->filesystem->dumpFile($filename, ['bar']);
 
         $this->assertFileExists($filename);
         $this->assertStringEqualsFile($filename, 'bar');
diff --git a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
index 642925ddee..eb6b35ddfd 100644
--- a/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
+++ b/src/Symfony/Component/Filesystem/Tests/FilesystemTestCase.php
@@ -18,7 +18,7 @@ class FilesystemTestCase extends TestCase
 {
     private $umask;
 
-    protected $longPathNamesWindows = array();
+    protected $longPathNamesWindows = [];
 
     /**
      * @var \Symfony\Component\Filesystem\Filesystem
@@ -84,7 +84,7 @@ class FilesystemTestCase extends TestCase
             foreach ($this->longPathNamesWindows as $path) {
                 exec('DEL '.$path);
             }
-            $this->longPathNamesWindows = array();
+            $this->longPathNamesWindows = [];
         }
 
         $this->filesystem->remove($this->workspace);
diff --git a/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php b/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
index f14420fb60..3d80a90582 100644
--- a/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
+++ b/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
@@ -41,6 +41,6 @@ class MockStream
      */
     public function url_stat($path, $flags)
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Finder/Comparator/Comparator.php b/src/Symfony/Component/Finder/Comparator/Comparator.php
index ea37566df8..6aee21cf09 100644
--- a/src/Symfony/Component/Finder/Comparator/Comparator.php
+++ b/src/Symfony/Component/Finder/Comparator/Comparator.php
@@ -64,7 +64,7 @@ class Comparator
             $operator = '==';
         }
 
-        if (!\in_array($operator, array('>', '<', '>=', '<=', '==', '!='))) {
+        if (!\in_array($operator, ['>', '<', '>=', '<=', '==', '!='])) {
             throw new \InvalidArgumentException(sprintf('Invalid operator "%s".', $operator));
         }
 
diff --git a/src/Symfony/Component/Finder/Finder.php b/src/Symfony/Component/Finder/Finder.php
index 993f9e3449..ab8f92b366 100644
--- a/src/Symfony/Component/Finder/Finder.php
+++ b/src/Symfony/Component/Finder/Finder.php
@@ -41,26 +41,26 @@ class Finder implements \IteratorAggregate, \Countable
     const IGNORE_DOT_FILES = 2;
 
     private $mode = 0;
-    private $names = array();
-    private $notNames = array();
-    private $exclude = array();
-    private $filters = array();
-    private $depths = array();
-    private $sizes = array();
+    private $names = [];
+    private $notNames = [];
+    private $exclude = [];
+    private $filters = [];
+    private $depths = [];
+    private $sizes = [];
     private $followLinks = false;
     private $reverseSorting = false;
     private $sort = false;
     private $ignore = 0;
-    private $dirs = array();
-    private $dates = array();
-    private $iterators = array();
-    private $contains = array();
-    private $notContains = array();
-    private $paths = array();
-    private $notPaths = array();
+    private $dirs = [];
+    private $dates = [];
+    private $iterators = [];
+    private $contains = [];
+    private $notContains = [];
+    private $paths = [];
+    private $notPaths = [];
     private $ignoreUnreadableDirs = false;
 
-    private static $vcsPatterns = array('.svn', '_svn', 'CVS', '_darcs', '.arch-params', '.monotone', '.bzr', '.git', '.hg');
+    private static $vcsPatterns = ['.svn', '_svn', 'CVS', '_darcs', '.arch-params', '.monotone', '.bzr', '.git', '.hg'];
 
     public function __construct()
     {
@@ -570,13 +570,13 @@ class Finder implements \IteratorAggregate, \Countable
      */
     public function in($dirs)
     {
-        $resolvedDirs = array();
+        $resolvedDirs = [];
 
         foreach ((array) $dirs as $dir) {
             if (is_dir($dir)) {
                 $resolvedDirs[] = $this->normalizeDir($dir);
             } elseif ($glob = glob($dir, (\defined('GLOB_BRACE') ? GLOB_BRACE : 0) | GLOB_ONLYDIR)) {
-                $resolvedDirs = array_merge($resolvedDirs, array_map(array($this, 'normalizeDir'), $glob));
+                $resolvedDirs = array_merge($resolvedDirs, array_map([$this, 'normalizeDir'], $glob));
             } else {
                 throw new \InvalidArgumentException(sprintf('The "%s" directory does not exist.', $dir));
             }
diff --git a/src/Symfony/Component/Finder/Glob.php b/src/Symfony/Component/Finder/Glob.php
index 27d9ce3d11..ea76d51ae0 100644
--- a/src/Symfony/Component/Finder/Glob.php
+++ b/src/Symfony/Component/Finder/Glob.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Finder;
  *
  *     // prints foo.bar and foo.baz
  *     $regex = glob_to_regex("foo.*");
- *     for (array('foo.bar', 'foo.baz', 'foo', 'bar') as $t)
+ *     for (['foo.bar', 'foo.baz', 'foo', 'bar'] as $t)
  *     {
  *         if (/$regex/) echo "matched: $car\n";
  *     }
diff --git a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
index 6359727d88..a30bbd0b9d 100644
--- a/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/CustomFilterIterator.php
@@ -21,7 +21,7 @@ namespace Symfony\Component\Finder\Iterator;
  */
 class CustomFilterIterator extends \FilterIterator
 {
-    private $filters = array();
+    private $filters = [];
 
     /**
      * @param \Iterator  $iterator The Iterator to filter
diff --git a/src/Symfony/Component/Finder/Iterator/DateRangeFilterIterator.php b/src/Symfony/Component/Finder/Iterator/DateRangeFilterIterator.php
index c08e0a163f..2e97e00d37 100644
--- a/src/Symfony/Component/Finder/Iterator/DateRangeFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/DateRangeFilterIterator.php
@@ -20,7 +20,7 @@ use Symfony\Component\Finder\Comparator\DateComparator;
  */
 class DateRangeFilterIterator extends \FilterIterator
 {
-    private $comparators = array();
+    private $comparators = [];
 
     /**
      * @param \Iterator        $iterator    The Iterator to filter
diff --git a/src/Symfony/Component/Finder/Iterator/ExcludeDirectoryFilterIterator.php b/src/Symfony/Component/Finder/Iterator/ExcludeDirectoryFilterIterator.php
index d2d41f4a3d..3c5a3f0e7c 100644
--- a/src/Symfony/Component/Finder/Iterator/ExcludeDirectoryFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/ExcludeDirectoryFilterIterator.php
@@ -20,7 +20,7 @@ class ExcludeDirectoryFilterIterator extends \FilterIterator implements \Recursi
 {
     private $iterator;
     private $isRecursive;
-    private $excludedDirs = array();
+    private $excludedDirs = [];
     private $excludedPattern;
 
     /**
@@ -31,7 +31,7 @@ class ExcludeDirectoryFilterIterator extends \FilterIterator implements \Recursi
     {
         $this->iterator = $iterator;
         $this->isRecursive = $iterator instanceof \RecursiveIterator;
-        $patterns = array();
+        $patterns = [];
         foreach ($directories as $directory) {
             $directory = rtrim($directory, '/');
             if (!$this->isRecursive || false !== strpos($directory, '/')) {
@@ -75,7 +75,7 @@ class ExcludeDirectoryFilterIterator extends \FilterIterator implements \Recursi
 
     public function getChildren()
     {
-        $children = new self($this->iterator->getChildren(), array());
+        $children = new self($this->iterator->getChildren(), []);
         $children->excludedDirs = $this->excludedDirs;
         $children->excludedPattern = $this->excludedPattern;
 
diff --git a/src/Symfony/Component/Finder/Iterator/MultiplePcreFilterIterator.php b/src/Symfony/Component/Finder/Iterator/MultiplePcreFilterIterator.php
index b94e1d439b..18b082ec0b 100644
--- a/src/Symfony/Component/Finder/Iterator/MultiplePcreFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/MultiplePcreFilterIterator.php
@@ -18,8 +18,8 @@ namespace Symfony\Component\Finder\Iterator;
  */
 abstract class MultiplePcreFilterIterator extends \FilterIterator
 {
-    protected $matchRegexps = array();
-    protected $noMatchRegexps = array();
+    protected $matchRegexps = [];
+    protected $noMatchRegexps = [];
 
     /**
      * @param \Iterator $iterator        The Iterator to filter
@@ -91,7 +91,7 @@ abstract class MultiplePcreFilterIterator extends \FilterIterator
                 return !preg_match('/[*?[:alnum:] \\\\]/', $start);
             }
 
-            foreach (array(array('{', '}'), array('(', ')'), array('[', ']'), array('<', '>')) as $delimiters) {
+            foreach ([['{', '}'], ['(', ')'], ['[', ']'], ['<', '>']] as $delimiters) {
                 if ($start === $delimiters[0] && $end === $delimiters[1]) {
                     return true;
                 }
diff --git a/src/Symfony/Component/Finder/Iterator/RecursiveDirectoryIterator.php b/src/Symfony/Component/Finder/Iterator/RecursiveDirectoryIterator.php
index 844ba4692e..3facef58a0 100644
--- a/src/Symfony/Component/Finder/Iterator/RecursiveDirectoryIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/RecursiveDirectoryIterator.php
@@ -96,7 +96,7 @@ class RecursiveDirectoryIterator extends \RecursiveDirectoryIterator
         } catch (\UnexpectedValueException $e) {
             if ($this->ignoreUnreadableDirs) {
                 // If directory is unreadable and finder is set to ignore it, a fake empty content is returned.
-                return new \RecursiveArrayIterator(array());
+                return new \RecursiveArrayIterator([]);
             } else {
                 throw new AccessDeniedException($e->getMessage(), $e->getCode(), $e);
             }
diff --git a/src/Symfony/Component/Finder/Iterator/SizeRangeFilterIterator.php b/src/Symfony/Component/Finder/Iterator/SizeRangeFilterIterator.php
index a68666b41d..2aeef67b87 100644
--- a/src/Symfony/Component/Finder/Iterator/SizeRangeFilterIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/SizeRangeFilterIterator.php
@@ -20,7 +20,7 @@ use Symfony\Component\Finder\Comparator\NumberComparator;
  */
 class SizeRangeFilterIterator extends \FilterIterator
 {
-    private $comparators = array();
+    private $comparators = [];
 
     /**
      * @param \Iterator          $iterator    The Iterator to filter
diff --git a/src/Symfony/Component/Finder/Iterator/SortableIterator.php b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
index 56bdcfb1a4..f95341f355 100644
--- a/src/Symfony/Component/Finder/Iterator/SortableIterator.php
+++ b/src/Symfony/Component/Finder/Iterator/SortableIterator.php
@@ -73,7 +73,8 @@ class SortableIterator implements \IteratorAggregate
         } elseif (self::SORT_BY_NONE === $sort) {
             $this->sort = $order;
         } elseif (\is_callable($sort)) {
-            $this->sort = $reverseOrder ? function ($a, $b) use ($sort) { return -$sort($a, $b); } : $sort;
+            $this->sort = $reverseOrder ? function ($a, $b) use ($sort) { return -$sort($a, $b); }
+            : $sort;
         } else {
             throw new \InvalidArgumentException('The SortableIterator takes a PHP callable or a valid built-in sort algorithm as an argument.');
         }
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
index 656fc57a4b..2f56092ed8 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/ComparatorTest.php
@@ -58,8 +58,8 @@ class ComparatorTest extends TestCase
 
     public function getTestData()
     {
-        return array(
-            array('<', '1000', array('500', '999'), array('1000', '1500')),
-        );
+        return [
+            ['<', '1000', ['500', '999'], ['1000', '1500']],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
index 8a6c1ddfd1..3aebf52449 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/DateComparatorTest.php
@@ -51,14 +51,14 @@ class DateComparatorTest extends TestCase
 
     public function getTestData()
     {
-        return array(
-            array('< 2005-10-10', array(strtotime('2005-10-09')), array(strtotime('2005-10-15'))),
-            array('until 2005-10-10', array(strtotime('2005-10-09')), array(strtotime('2005-10-15'))),
-            array('before 2005-10-10', array(strtotime('2005-10-09')), array(strtotime('2005-10-15'))),
-            array('> 2005-10-10', array(strtotime('2005-10-15')), array(strtotime('2005-10-09'))),
-            array('after 2005-10-10', array(strtotime('2005-10-15')), array(strtotime('2005-10-09'))),
-            array('since 2005-10-10', array(strtotime('2005-10-15')), array(strtotime('2005-10-09'))),
-            array('!= 2005-10-10', array(strtotime('2005-10-11')), array(strtotime('2005-10-10'))),
-        );
+        return [
+            ['< 2005-10-10', [strtotime('2005-10-09')], [strtotime('2005-10-15')]],
+            ['until 2005-10-10', [strtotime('2005-10-09')], [strtotime('2005-10-15')]],
+            ['before 2005-10-10', [strtotime('2005-10-09')], [strtotime('2005-10-15')]],
+            ['> 2005-10-10', [strtotime('2005-10-15')], [strtotime('2005-10-09')]],
+            ['after 2005-10-10', [strtotime('2005-10-15')], [strtotime('2005-10-09')]],
+            ['since 2005-10-10', [strtotime('2005-10-15')], [strtotime('2005-10-09')]],
+            ['!= 2005-10-10', [strtotime('2005-10-11')], [strtotime('2005-10-10')]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php b/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
index 30a75c738c..5b49b660a7 100644
--- a/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Comparator/NumberComparatorTest.php
@@ -53,39 +53,39 @@ class NumberComparatorTest extends TestCase
 
     public function getTestData()
     {
-        return array(
-            array('< 1000', array('500', '999'), array('1000', '1500')),
+        return [
+            ['< 1000', ['500', '999'], ['1000', '1500']],
 
-            array('< 1K', array('500', '999'), array('1000', '1500')),
-            array('<1k', array('500', '999'), array('1000', '1500')),
-            array('  < 1 K ', array('500', '999'), array('1000', '1500')),
-            array('<= 1K', array('1000'), array('1001')),
-            array('> 1K', array('1001'), array('1000')),
-            array('>= 1K', array('1000'), array('999')),
+            ['< 1K', ['500', '999'], ['1000', '1500']],
+            ['<1k', ['500', '999'], ['1000', '1500']],
+            ['  < 1 K ', ['500', '999'], ['1000', '1500']],
+            ['<= 1K', ['1000'], ['1001']],
+            ['> 1K', ['1001'], ['1000']],
+            ['>= 1K', ['1000'], ['999']],
 
-            array('< 1KI', array('500', '1023'), array('1024', '1500')),
-            array('<= 1KI', array('1024'), array('1025')),
-            array('> 1KI', array('1025'), array('1024')),
-            array('>= 1KI', array('1024'), array('1023')),
+            ['< 1KI', ['500', '1023'], ['1024', '1500']],
+            ['<= 1KI', ['1024'], ['1025']],
+            ['> 1KI', ['1025'], ['1024']],
+            ['>= 1KI', ['1024'], ['1023']],
 
-            array('1KI', array('1024'), array('1023', '1025')),
-            array('==1KI', array('1024'), array('1023', '1025')),
+            ['1KI', ['1024'], ['1023', '1025']],
+            ['==1KI', ['1024'], ['1023', '1025']],
 
-            array('==1m', array('1000000'), array('999999', '1000001')),
-            array('==1mi', array(1024 * 1024), array(1024 * 1024 - 1, 1024 * 1024 + 1)),
+            ['==1m', ['1000000'], ['999999', '1000001']],
+            ['==1mi', [1024 * 1024], [1024 * 1024 - 1, 1024 * 1024 + 1]],
 
-            array('==1g', array('1000000000'), array('999999999', '1000000001')),
-            array('==1gi', array(1024 * 1024 * 1024), array(1024 * 1024 * 1024 - 1, 1024 * 1024 * 1024 + 1)),
+            ['==1g', ['1000000000'], ['999999999', '1000000001']],
+            ['==1gi', [1024 * 1024 * 1024], [1024 * 1024 * 1024 - 1, 1024 * 1024 * 1024 + 1]],
 
-            array('!= 1000', array('500', '999'), array('1000')),
-        );
+            ['!= 1000', ['500', '999'], ['1000']],
+        ];
     }
 
     public function getConstructorTestData()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     '1', '0',
                     '3.5', '33.55', '123.456', '123456.78',
                     '.1', '.123',
@@ -94,15 +94,15 @@ class NumberComparatorTest extends TestCase
                     '==1', '!=1', '<1', '>1', '<=1', '>=1',
                     '==1k', '==1ki', '==1m', '==1mi', '==1g', '==1gi',
                     '1k', '1ki', '1m', '1mi', '1g', '1gi',
-                ),
-                array(
+                ],
+                [
                     false, null, '',
                     ' ', 'foobar',
                     '=1', '===1',
                     '0 . 1', '123 .45', '234. 567',
                     '..', '.0.', '0.1.2',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/FinderTest.php b/src/Symfony/Component/Finder/Tests/FinderTest.php
index cdd176d791..1b50663e9f 100644
--- a/src/Symfony/Component/Finder/Tests/FinderTest.php
+++ b/src/Symfony/Component/Finder/Tests/FinderTest.php
@@ -24,20 +24,20 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->directories());
-        $this->assertIterator($this->toAbsolute(array('foo', 'qux', 'toto')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['foo', 'qux', 'toto']), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->directories();
         $finder->files();
         $finder->directories();
-        $this->assertIterator($this->toAbsolute(array('foo', 'qux', 'toto')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['foo', 'qux', 'toto']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testFiles()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->files());
-        $this->assertIterator($this->toAbsolute(array('foo/bar.tmp',
+        $this->assertIterator($this->toAbsolute(['foo/bar.tmp',
             'test.php',
             'test.py',
             'foo bar',
@@ -49,13 +49,13 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->files();
         $finder->directories();
         $finder->files();
-        $this->assertIterator($this->toAbsolute(array('foo/bar.tmp',
+        $this->assertIterator($this->toAbsolute(['foo/bar.tmp',
             'test.php',
             'test.py',
             'foo bar',
@@ -67,14 +67,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testRemoveTrailingSlash()
     {
         $finder = $this->buildFinder();
 
-        $expected = $this->toAbsolute(array(
+        $expected = $this->toAbsolute([
             'foo/bar.tmp',
             'test.php',
             'test.py',
@@ -87,7 +87,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        ));
+        ]);
         $in = self::$tmpDir.'//';
 
         $this->assertIterator($expected, $finder->in($in)->files()->getIterator());
@@ -102,7 +102,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
         $finder = $this->buildFinder();
 
         symlink($this->toAbsolute('foo'), $this->toAbsolute('baz'));
-        $expected = $this->toAbsolute(array('baz/bar.tmp'));
+        $expected = $this->toAbsolute(['baz/bar.tmp']);
         $in = self::$tmpDir.'/baz/';
         try {
             $this->assertIterator($expected, $finder->in($in)->files()->getIterator());
@@ -117,7 +117,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder();
 
-        $expected = $this->toAbsolute(array('foo/../foo/bar.tmp'));
+        $expected = $this->toAbsolute(['foo/../foo/bar.tmp']);
         $in = self::$tmpDir.'/foo/../foo/';
         $this->assertIterator($expected, $finder->in($in)->files()->getIterator());
     }
@@ -126,7 +126,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->depth('< 1'));
-        $this->assertIterator($this->toAbsolute(array('foo',
+        $this->assertIterator($this->toAbsolute(['foo',
             'test.php',
             'test.py',
             'toto',
@@ -138,11 +138,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->depth('<= 0'));
-        $this->assertIterator($this->toAbsolute(array('foo',
+        $this->assertIterator($this->toAbsolute(['foo',
             'test.php',
             'test.py',
             'toto',
@@ -154,37 +154,37 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->depth('>= 1'));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo/bar.tmp',
             'qux/baz_100_1.py',
             'qux/baz_1_2.py',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->depth('< 1')->depth('>= 1');
-        $this->assertIterator(array(), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator([], $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testDepthWithArrayParam()
     {
         $finder = $this->buildFinder();
-        $finder->depth(array('>= 1', '< 2'));
-        $this->assertIterator($this->toAbsolute(array(
+        $finder->depth(['>= 1', '< 2']);
+        $this->assertIterator($this->toAbsolute([
             'foo/bar.tmp',
             'qux/baz_100_1.py',
             'qux/baz_1_2.py',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testName()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->name('*.php'));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'test.php',
             'qux_0_1.php',
             'qux_1000_1.php',
@@ -192,20 +192,20 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('test.ph*');
         $finder->name('test.py');
-        $this->assertIterator($this->toAbsolute(array('test.php', 'test.py')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['test.php', 'test.py']), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('~^test~i');
-        $this->assertIterator($this->toAbsolute(array('test.php', 'test.py')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['test.php', 'test.py']), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('~\\.php$~i');
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'test.php',
             'qux_0_1.php',
             'qux_1000_1.php',
@@ -213,25 +213,25 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('test.p{hp,y}');
-        $this->assertIterator($this->toAbsolute(array('test.php', 'test.py')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['test.php', 'test.py']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testNameWithArrayParam()
     {
         $finder = $this->buildFinder();
-        $finder->name(array('test.php', 'test.py'));
-        $this->assertIterator($this->toAbsolute(array('test.php', 'test.py')), $finder->in(self::$tmpDir)->getIterator());
+        $finder->name(['test.php', 'test.py']);
+        $this->assertIterator($this->toAbsolute(['test.php', 'test.py']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testNotName()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->notName('*.php'));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'test.py',
@@ -240,44 +240,44 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux',
             'qux/baz_100_1.py',
             'qux/baz_1_2.py',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->notName('*.php');
         $finder->notName('*.py');
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'toto',
             'foo bar',
             'qux',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('test.ph*');
         $finder->name('test.py');
         $finder->notName('*.php');
         $finder->notName('*.py');
-        $this->assertIterator(array(), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator([], $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->name('test.ph*');
         $finder->name('test.py');
         $finder->notName('*.p{hp,y}');
-        $this->assertIterator(array(), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator([], $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testNotNameWithArrayParam()
     {
         $finder = $this->buildFinder();
-        $finder->notName(array('*.php', '*.py'));
-        $this->assertIterator($this->toAbsolute(array(
+        $finder->notName(['*.php', '*.py']);
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'toto',
             'foo bar',
             'qux',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     /**
@@ -287,45 +287,45 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder();
         $finder->name($regex);
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'test.py',
             'test.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSize()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->files()->size('< 1K')->size('> 500'));
-        $this->assertIterator($this->toAbsolute(array('test.php')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['test.php']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSizeWithArrayParam()
     {
         $finder = $this->buildFinder();
-        $this->assertSame($finder, $finder->files()->size(array('< 1K', '> 500')));
-        $this->assertIterator($this->toAbsolute(array('test.php')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertSame($finder, $finder->files()->size(['< 1K', '> 500']));
+        $this->assertIterator($this->toAbsolute(['test.php']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testDate()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->files()->date('until last month'));
-        $this->assertIterator($this->toAbsolute(array('foo/bar.tmp', 'test.php')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['foo/bar.tmp', 'test.php']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testDateWithArrayParam()
     {
         $finder = $this->buildFinder();
-        $this->assertSame($finder, $finder->files()->date(array('>= 2005-10-15', 'until last month')));
-        $this->assertIterator($this->toAbsolute(array('foo/bar.tmp', 'test.php')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertSame($finder, $finder->files()->date(['>= 2005-10-15', 'until last month']));
+        $this->assertIterator($this->toAbsolute(['foo/bar.tmp', 'test.php']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testExclude()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->exclude('foo'));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'test.php',
             'test.py',
             'toto',
@@ -339,14 +339,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testIgnoreVCS()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->ignoreVCS(false)->ignoreDotFiles(false));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             '.git',
             'foo',
             'foo/bar.tmp',
@@ -368,11 +368,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->ignoreVCS(false)->ignoreVCS(false)->ignoreDotFiles(false);
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             '.git',
             'foo',
             'foo/bar.tmp',
@@ -394,11 +394,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->ignoreVCS(true)->ignoreDotFiles(false));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'test.php',
@@ -418,14 +418,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testIgnoreDotFiles()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->ignoreDotFiles(false)->ignoreVCS(false));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             '.git',
             '.bar',
             '.foo',
@@ -447,11 +447,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $finder->ignoreDotFiles(false)->ignoreDotFiles(false)->ignoreVCS(false);
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             '.git',
             '.bar',
             '.foo',
@@ -473,11 +473,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->ignoreDotFiles(true)->ignoreVCS(false));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'test.php',
@@ -493,14 +493,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByName()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByName());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo bar',
             'foo/bar.tmp',
@@ -516,14 +516,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'test.php',
             'test.py',
             'toto',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByType()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByType());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo bar',
             'toto',
@@ -539,14 +539,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByAccessedTime()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByAccessedTime());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo/bar.tmp',
             'test.php',
             'toto',
@@ -562,14 +562,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByChangedTime()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByChangedTime());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'toto',
             'test.py',
             'test.php',
@@ -585,14 +585,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByModifiedTime()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByModifiedTime());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo/bar.tmp',
             'test.php',
             'toto',
@@ -608,7 +608,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testReverseSorting()
@@ -616,7 +616,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByName());
         $this->assertSame($finder, $finder->reverseSorting());
-        $this->assertOrderedIteratorInForeach($this->toAbsolute(array(
+        $this->assertOrderedIteratorInForeach($this->toAbsolute([
             'toto',
             'test.py',
             'test.php',
@@ -632,14 +632,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'foo/bar.tmp',
             'foo bar',
             'foo',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSortByNameNatural()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByName(true));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo bar',
             'foo/bar.tmp',
@@ -655,11 +655,11 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'test.php',
             'test.py',
             'toto',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sortByName(false));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo bar',
             'foo/bar.tmp',
@@ -675,14 +675,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'test.php',
             'test.py',
             'toto',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testSort()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->sort(function (\SplFileInfo $a, \SplFileInfo $b) { return strcmp($a->getRealPath(), $b->getRealPath()); }));
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo bar',
             'foo/bar.tmp',
@@ -698,14 +698,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testFilter()
     {
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->filter(function (\SplFileInfo $f) { return false !== strpos($f, 'test'); }));
-        $this->assertIterator($this->toAbsolute(array('test.php', 'test.py')), $finder->in(self::$tmpDir)->getIterator());
+        $this->assertIterator($this->toAbsolute(['test.php', 'test.py']), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testFollowLinks()
@@ -716,7 +716,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
 
         $finder = $this->buildFinder();
         $this->assertSame($finder, $finder->followLinks());
-        $this->assertIterator($this->toAbsolute(array(
+        $this->assertIterator($this->toAbsolute([
             'foo',
             'foo/bar.tmp',
             'test.php',
@@ -732,15 +732,15 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        )), $finder->in(self::$tmpDir)->getIterator());
+        ]), $finder->in(self::$tmpDir)->getIterator());
     }
 
     public function testIn()
     {
         $finder = $this->buildFinder();
-        $iterator = $finder->files()->name('*.php')->depth('< 1')->in(array(self::$tmpDir, __DIR__))->getIterator();
+        $iterator = $finder->files()->name('*.php')->depth('< 1')->in([self::$tmpDir, __DIR__])->getIterator();
 
-        $expected = array(
+        $expected = [
             self::$tmpDir.\DIRECTORY_SEPARATOR.'test.php',
             __DIR__.\DIRECTORY_SEPARATOR.'FinderTest.php',
             __DIR__.\DIRECTORY_SEPARATOR.'GlobTest.php',
@@ -750,7 +750,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             self::$tmpDir.\DIRECTORY_SEPARATOR.'qux_10_2.php',
             self::$tmpDir.\DIRECTORY_SEPARATOR.'qux_12_0.php',
             self::$tmpDir.\DIRECTORY_SEPARATOR.'qux_2_0.php',
-        );
+        ];
 
         $this->assertIterator($expected, $iterator);
     }
@@ -767,9 +767,9 @@ class FinderTest extends Iterator\RealIteratorTestCase
     public function testInWithGlob()
     {
         $finder = $this->buildFinder();
-        $finder->in(array(__DIR__.'/Fixtures/*/B/C/', __DIR__.'/Fixtures/*/*/B/C/'))->getIterator();
+        $finder->in([__DIR__.'/Fixtures/*/B/C/', __DIR__.'/Fixtures/*/*/B/C/'])->getIterator();
 
-        $this->assertIterator($this->toAbsoluteFixtures(array('A/B/C/abc.dat', 'copy/A/B/C/abc.dat.copy')), $finder);
+        $this->assertIterator($this->toAbsoluteFixtures(['A/B/C/abc.dat', 'copy/A/B/C/abc.dat.copy']), $finder);
     }
 
     /**
@@ -784,9 +784,9 @@ class FinderTest extends Iterator\RealIteratorTestCase
     public function testInWithGlobBrace()
     {
         $finder = $this->buildFinder();
-        $finder->in(array(__DIR__.'/Fixtures/{A,copy/A}/B/C'))->getIterator();
+        $finder->in([__DIR__.'/Fixtures/{A,copy/A}/B/C'])->getIterator();
 
-        $this->assertIterator($this->toAbsoluteFixtures(array('A/B/C/abc.dat', 'copy/A/B/C/abc.dat.copy')), $finder);
+        $this->assertIterator($this->toAbsoluteFixtures(['A/B/C/abc.dat', 'copy/A/B/C/abc.dat.copy']), $finder);
     }
 
     /**
@@ -801,12 +801,12 @@ class FinderTest extends Iterator\RealIteratorTestCase
     public function testGetIterator()
     {
         $finder = $this->buildFinder();
-        $dirs = array();
+        $dirs = [];
         foreach ($finder->directories()->in(self::$tmpDir) as $dir) {
             $dirs[] = (string) $dir;
         }
 
-        $expected = $this->toAbsolute(array('foo', 'qux', 'toto'));
+        $expected = $this->toAbsolute(['foo', 'qux', 'toto']);
 
         sort($dirs);
         sort($expected);
@@ -827,13 +827,13 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder()->in(self::$tmpDir);
 
-        $paths = array();
+        $paths = [];
 
         foreach ($finder as $file) {
             $paths[] = $file->getRelativePath();
         }
 
-        $ref = array('', '', '', '', '', '', '', '', '', '', '', 'foo', 'qux', 'qux', '');
+        $ref = ['', '', '', '', '', '', '', '', '', '', '', 'foo', 'qux', 'qux', ''];
 
         sort($ref);
         sort($paths);
@@ -845,13 +845,13 @@ class FinderTest extends Iterator\RealIteratorTestCase
     {
         $finder = $this->buildFinder()->in(self::$tmpDir)->sortByName();
 
-        $paths = array();
+        $paths = [];
 
         foreach ($finder as $file) {
             $paths[] = $file->getRelativePathname();
         }
 
-        $ref = array(
+        $ref = [
             'test.php',
             'toto',
             'test.py',
@@ -867,7 +867,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
         sort($paths);
         sort($ref);
@@ -885,7 +885,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
 
         $finder = $finder->append($finder1);
 
-        $this->assertIterator($this->toAbsolute(array('foo', 'foo/bar.tmp', 'qux', 'toto')), $finder->getIterator());
+        $this->assertIterator($this->toAbsolute(['foo', 'foo/bar.tmp', 'qux', 'toto']), $finder->getIterator());
     }
 
     public function testAppendWithAnArray()
@@ -893,14 +893,14 @@ class FinderTest extends Iterator\RealIteratorTestCase
         $finder = $this->buildFinder();
         $finder->files()->in(self::$tmpDir.\DIRECTORY_SEPARATOR.'foo');
 
-        $finder->append($this->toAbsolute(array('foo', 'toto')));
+        $finder->append($this->toAbsolute(['foo', 'toto']));
 
-        $this->assertIterator($this->toAbsolute(array('foo', 'foo/bar.tmp', 'toto')), $finder->getIterator());
+        $this->assertIterator($this->toAbsolute(['foo', 'foo/bar.tmp', 'toto']), $finder->getIterator());
     }
 
     public function testAppendReturnsAFinder()
     {
-        $this->assertInstanceOf('Symfony\\Component\\Finder\\Finder', Finder::create()->append(array()));
+        $this->assertInstanceOf('Symfony\\Component\\Finder\\Finder', Finder::create()->append([]));
     }
 
     public function testAppendDoesNotRequireIn()
@@ -981,7 +981,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             ->directories()
             ->name('Fixtures')
             ->contains('abc');
-        $this->assertIterator(array(), $finder);
+        $this->assertIterator([], $finder);
     }
 
     public function testNotContainsOnDirectory()
@@ -991,7 +991,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
             ->directories()
             ->name('Fixtures')
             ->notContains('abc');
-        $this->assertIterator(array(), $finder);
+        $this->assertIterator([], $finder);
     }
 
     /**
@@ -1002,10 +1002,10 @@ class FinderTest extends Iterator\RealIteratorTestCase
      */
     public function testMultipleLocations()
     {
-        $locations = array(
+        $locations = [
             self::$tmpDir.'/',
             self::$tmpDir.'/toto/',
-        );
+        ];
 
         // it is expected that there are test.py test.php in the tmpDir
         $finder = new Finder();
@@ -1027,18 +1027,18 @@ class FinderTest extends Iterator\RealIteratorTestCase
      */
     public function testMultipleLocationsWithSubDirectories()
     {
-        $locations = array(
+        $locations = [
             __DIR__.'/Fixtures/one',
             self::$tmpDir.\DIRECTORY_SEPARATOR.'toto',
-        );
+        ];
 
         $finder = $this->buildFinder();
         $finder->in($locations)->depth('< 10')->name('*.neon');
 
-        $expected = array(
+        $expected = [
             __DIR__.'/Fixtures/one'.\DIRECTORY_SEPARATOR.'b'.\DIRECTORY_SEPARATOR.'c.neon',
             __DIR__.'/Fixtures/one'.\DIRECTORY_SEPARATOR.'b'.\DIRECTORY_SEPARATOR.'d.neon',
-        );
+        ];
 
         $this->assertIterator($expected, $finder);
         $this->assertIteratorInForeach($expected, $finder);
@@ -1061,34 +1061,34 @@ class FinderTest extends Iterator\RealIteratorTestCase
         $finder->in(__DIR__.\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR.'r+e.gex[c]a(r)s')
             ->path('/^dir/');
 
-        $expected = array('r+e.gex[c]a(r)s'.\DIRECTORY_SEPARATOR.'dir', 'r+e.gex[c]a(r)s'.\DIRECTORY_SEPARATOR.'dir'.\DIRECTORY_SEPARATOR.'bar.dat');
+        $expected = ['r+e.gex[c]a(r)s'.\DIRECTORY_SEPARATOR.'dir', 'r+e.gex[c]a(r)s'.\DIRECTORY_SEPARATOR.'dir'.\DIRECTORY_SEPARATOR.'bar.dat'];
         $this->assertIterator($this->toAbsoluteFixtures($expected), $finder);
     }
 
     public function getContainsTestData()
     {
-        return array(
-            array('', '', array()),
-            array('foo', 'bar', array()),
-            array('', 'foobar', array('dolor.txt', 'ipsum.txt', 'lorem.txt')),
-            array('lorem ipsum dolor sit amet', 'foobar', array('lorem.txt')),
-            array('sit', 'bar', array('dolor.txt', 'ipsum.txt', 'lorem.txt')),
-            array('dolor sit amet', '@^L@m', array('dolor.txt', 'ipsum.txt')),
-            array('/^lorem ipsum dolor sit amet$/m', 'foobar', array('lorem.txt')),
-            array('lorem', 'foobar', array('lorem.txt')),
-            array('', 'lorem', array('dolor.txt', 'ipsum.txt')),
-            array('ipsum dolor sit amet', '/^IPSUM/m', array('lorem.txt')),
-            array(array('lorem', 'dolor'), array(), array('lorem.txt', 'ipsum.txt', 'dolor.txt')),
-            array('', array('lorem', 'ipsum'), array('dolor.txt')),
-        );
+        return [
+            ['', '', []],
+            ['foo', 'bar', []],
+            ['', 'foobar', ['dolor.txt', 'ipsum.txt', 'lorem.txt']],
+            ['lorem ipsum dolor sit amet', 'foobar', ['lorem.txt']],
+            ['sit', 'bar', ['dolor.txt', 'ipsum.txt', 'lorem.txt']],
+            ['dolor sit amet', '@^L@m', ['dolor.txt', 'ipsum.txt']],
+            ['/^lorem ipsum dolor sit amet$/m', 'foobar', ['lorem.txt']],
+            ['lorem', 'foobar', ['lorem.txt']],
+            ['', 'lorem', ['dolor.txt', 'ipsum.txt']],
+            ['ipsum dolor sit amet', '/^IPSUM/m', ['lorem.txt']],
+            [['lorem', 'dolor'], [], ['lorem.txt', 'ipsum.txt', 'dolor.txt']],
+            ['', ['lorem', 'ipsum'], ['dolor.txt']],
+        ];
     }
 
     public function getRegexNameTestData()
     {
-        return array(
-            array('~.*t\\.p.+~i'),
-            array('~t.*s~i'),
-        );
+        return [
+            ['~.*t\\.p.+~i'],
+            ['~t.*s~i'],
+        ];
     }
 
     /**
@@ -1106,29 +1106,29 @@ class FinderTest extends Iterator\RealIteratorTestCase
 
     public function getTestPathData()
     {
-        return array(
-            array('', '', array()),
-            array('/^A\/B\/C/', '/C$/',
-                array('A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat'),
-            ),
-            array('/^A\/B/', 'foobar',
-                array(
+        return [
+            ['', '', []],
+            ['/^A\/B\/C/', '/C$/',
+                ['A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat'],
+            ],
+            ['/^A\/B/', 'foobar',
+                [
                     'A'.\DIRECTORY_SEPARATOR.'B',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'ab.dat',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat',
-                ),
-            ),
-            array('A/B/C', 'foobar',
-                array(
+                ],
+            ],
+            ['A/B/C', 'foobar',
+                [
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat',
                     'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
                     'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat.copy',
-                ),
-            ),
-            array('A/B', 'foobar',
-                array(
+                ],
+            ],
+            ['A/B', 'foobar',
+                [
                     //dirs
                     'A'.\DIRECTORY_SEPARATOR.'B',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
@@ -1139,27 +1139,27 @@ class FinderTest extends Iterator\RealIteratorTestCase
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat',
                     'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'ab.dat.copy',
                     'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat.copy',
-                ),
-            ),
-            array('/^with space\//', 'foobar',
-                array(
+                ],
+            ],
+            ['/^with space\//', 'foobar',
+                [
                     'with space'.\DIRECTORY_SEPARATOR.'foo.txt',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 '/^A/',
-                array('a.dat', 'abc.dat'),
-                array(
+                ['a.dat', 'abc.dat'],
+                [
                     'A',
                     'A'.\DIRECTORY_SEPARATOR.'B',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'ab.dat',
-                ),
-            ),
-            array(
-                array('/^A/', 'one'),
+                ],
+            ],
+            [
+                ['/^A/', 'one'],
                 'foobar',
-                array(
+                [
                     'A',
                     'A'.\DIRECTORY_SEPARATOR.'B',
                     'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C',
@@ -1171,9 +1171,9 @@ class FinderTest extends Iterator\RealIteratorTestCase
                     'one'.\DIRECTORY_SEPARATOR.'b',
                     'one'.\DIRECTORY_SEPARATOR.'b'.\DIRECTORY_SEPARATOR.'c.neon',
                     'one'.\DIRECTORY_SEPARATOR.'b'.\DIRECTORY_SEPARATOR.'d.neon',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
     }
 
     public function testAccessDeniedException()
@@ -1191,7 +1191,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
 
         if (false === $couldRead = is_readable($testDir)) {
             try {
-                $this->assertIterator($this->toAbsolute(array('foo bar', 'test.php', 'test.py')), $finder->getIterator());
+                $this->assertIterator($this->toAbsolute(['foo bar', 'test.php', 'test.py']), $finder->getIterator());
                 $this->fail('Finder should throw an exception when opening a non-readable directory.');
             } catch (\Exception $e) {
                 $expectedExceptionClass = 'Symfony\\Component\\Finder\\Exception\\AccessDeniedException';
@@ -1230,7 +1230,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
         chmod($testDir, 0333);
 
         if (false === ($couldRead = is_readable($testDir))) {
-            $this->assertIterator($this->toAbsolute(array(
+            $this->assertIterator($this->toAbsolute([
                 'foo bar',
                 'test.php',
                 'test.py',
@@ -1242,7 +1242,7 @@ class FinderTest extends Iterator\RealIteratorTestCase
                 'qux_10_2.php',
                 'qux_12_0.php',
                 'qux_2_0.php',
-                )
+                ]
             ), $finder->getIterator());
         }
 
diff --git a/src/Symfony/Component/Finder/Tests/GlobTest.php b/src/Symfony/Component/Finder/Tests/GlobTest.php
index 3a5aab3124..2d48799c5c 100644
--- a/src/Symfony/Component/Finder/Tests/GlobTest.php
+++ b/src/Symfony/Component/Finder/Tests/GlobTest.php
@@ -39,7 +39,7 @@ class GlobTest extends TestCase
         }
         sort($match);
 
-        $this->assertSame(array('one/b/c.neon', 'one/b/d.neon'), $match);
+        $this->assertSame(['one/b/c.neon', 'one/b/d.neon'], $match);
     }
 
     public function testGlobToRegexDoubleStarNonStrictDots()
@@ -56,7 +56,7 @@ class GlobTest extends TestCase
         }
         sort($match);
 
-        $this->assertSame(array('.dot/b/c.neon', '.dot/b/d.neon', 'one/b/c.neon', 'one/b/d.neon'), $match);
+        $this->assertSame(['.dot/b/c.neon', '.dot/b/d.neon', 'one/b/c.neon', 'one/b/d.neon'], $match);
     }
 
     public function testGlobToRegexDoubleStarWithoutLeadingSlash()
@@ -73,7 +73,7 @@ class GlobTest extends TestCase
         }
         sort($match);
 
-        $this->assertSame(array('one/a', 'one/b', 'one/b/c.neon', 'one/b/d.neon'), $match);
+        $this->assertSame(['one/a', 'one/b', 'one/b/c.neon', 'one/b/d.neon'], $match);
     }
 
     public function testGlobToRegexDoubleStarWithoutLeadingSlashNotStrictLeadingDot()
@@ -90,6 +90,6 @@ class GlobTest extends TestCase
         }
         sort($match);
 
-        $this->assertSame(array('one/.dot', 'one/a', 'one/b', 'one/b/c.neon', 'one/b/d.neon'), $match);
+        $this->assertSame(['one/.dot', 'one/a', 'one/b', 'one/b/c.neon', 'one/b/d.neon'], $match);
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/CustomFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/CustomFilterIteratorTest.php
index b036ad13c2..ad0187e032 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/CustomFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/CustomFilterIteratorTest.php
@@ -20,7 +20,7 @@ class CustomFilterIteratorTest extends IteratorTestCase
      */
     public function testWithInvalidFilter()
     {
-        new CustomFilterIterator(new Iterator(), array('foo'));
+        new CustomFilterIterator(new Iterator(), ['foo']);
     }
 
     /**
@@ -28,7 +28,7 @@ class CustomFilterIteratorTest extends IteratorTestCase
      */
     public function testAccept($filters, $expected)
     {
-        $inner = new Iterator(array('test.php', 'test.py', 'foo.php'));
+        $inner = new Iterator(['test.php', 'test.py', 'foo.php']);
 
         $iterator = new CustomFilterIterator($inner, $filters);
 
@@ -37,10 +37,10 @@ class CustomFilterIteratorTest extends IteratorTestCase
 
     public function getAcceptData()
     {
-        return array(
-            array(array(function (\SplFileInfo $fileinfo) { return false; }), array()),
-            array(array(function (\SplFileInfo $fileinfo) { return 0 === strpos($fileinfo, 'test'); }), array('test.php', 'test.py')),
-            array(array('is_dir'), array()),
-        );
+        return [
+            [[function (\SplFileInfo $fileinfo) { return false; }], []],
+            [[function (\SplFileInfo $fileinfo) { return 0 === strpos($fileinfo, 'test'); }], ['test.php', 'test.py']],
+            [['is_dir'], []],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/DateRangeFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/DateRangeFilterIteratorTest.php
index ade1a41a01..2d8cfb30bd 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/DateRangeFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/DateRangeFilterIteratorTest.php
@@ -32,7 +32,7 @@ class DateRangeFilterIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $since20YearsAgo = array(
+        $since20YearsAgo = [
             '.git',
             'test.py',
             'foo',
@@ -54,9 +54,9 @@ class DateRangeFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $since2MonthsAgo = array(
+        $since2MonthsAgo = [
             '.git',
             'test.py',
             'foo',
@@ -76,17 +76,17 @@ class DateRangeFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $untilLastMonth = array(
+        $untilLastMonth = [
             'foo/bar.tmp',
             'test.php',
-        );
+        ];
 
-        return array(
-            array(array(new DateComparator('since 20 years ago')), $this->toAbsolute($since20YearsAgo)),
-            array(array(new DateComparator('since 2 months ago')), $this->toAbsolute($since2MonthsAgo)),
-            array(array(new DateComparator('until last month')), $this->toAbsolute($untilLastMonth)),
-        );
+        return [
+            [[new DateComparator('since 20 years ago')], $this->toAbsolute($since20YearsAgo)],
+            [[new DateComparator('since 2 months ago')], $this->toAbsolute($since2MonthsAgo)],
+            [[new DateComparator('until last month')], $this->toAbsolute($untilLastMonth)],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/DepthRangeFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/DepthRangeFilterIteratorTest.php
index 3a403cb955..ef4fa2e9ac 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/DepthRangeFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/DepthRangeFilterIteratorTest.php
@@ -32,7 +32,7 @@ class DepthRangeFilterIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $lessThan1 = array(
+        $lessThan1 = [
             '.git',
             'test.py',
             'foo',
@@ -48,9 +48,9 @@ class DepthRangeFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $lessThanOrEqualTo1 = array(
+        $lessThanOrEqualTo1 = [
             '.git',
             'test.py',
             'foo',
@@ -72,32 +72,32 @@ class DepthRangeFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $graterThanOrEqualTo1 = array(
+        $graterThanOrEqualTo1 = [
             'toto/.git',
             'foo/bar.tmp',
             '.foo/.bar',
             '.foo/bar',
             'qux/baz_100_1.py',
             'qux/baz_1_2.py',
-        );
+        ];
 
-        $equalTo1 = array(
+        $equalTo1 = [
             'toto/.git',
             'foo/bar.tmp',
             '.foo/.bar',
             '.foo/bar',
             'qux/baz_100_1.py',
             'qux/baz_1_2.py',
-        );
+        ];
 
-        return array(
-            array(0, 0, $this->toAbsolute($lessThan1)),
-            array(0, 1, $this->toAbsolute($lessThanOrEqualTo1)),
-            array(2, PHP_INT_MAX, array()),
-            array(1, PHP_INT_MAX, $this->toAbsolute($graterThanOrEqualTo1)),
-            array(1, 1, $this->toAbsolute($equalTo1)),
-        );
+        return [
+            [0, 0, $this->toAbsolute($lessThan1)],
+            [0, 1, $this->toAbsolute($lessThanOrEqualTo1)],
+            [2, PHP_INT_MAX, []],
+            [1, PHP_INT_MAX, $this->toAbsolute($graterThanOrEqualTo1)],
+            [1, 1, $this->toAbsolute($equalTo1)],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/ExcludeDirectoryFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/ExcludeDirectoryFilterIteratorTest.php
index c977b0cfdb..1729766fe4 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/ExcludeDirectoryFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/ExcludeDirectoryFilterIteratorTest.php
@@ -30,7 +30,7 @@ class ExcludeDirectoryFilterIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $foo = array(
+        $foo = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -50,9 +50,9 @@ class ExcludeDirectoryFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $fo = array(
+        $fo = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -74,9 +74,9 @@ class ExcludeDirectoryFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $toto = array(
+        $toto = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -96,12 +96,12 @@ class ExcludeDirectoryFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        return array(
-            array(array('foo'), $this->toAbsolute($foo)),
-            array(array('fo'), $this->toAbsolute($fo)),
-            array(array('toto/'), $this->toAbsolute($toto)),
-        );
+        return [
+            [['foo'], $this->toAbsolute($foo)],
+            [['fo'], $this->toAbsolute($fo)],
+            [['toto/'], $this->toAbsolute($toto)],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/FileTypeFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/FileTypeFilterIteratorTest.php
index 0ecd8dfe73..49616ce07c 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/FileTypeFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/FileTypeFilterIteratorTest.php
@@ -29,7 +29,7 @@ class FileTypeFilterIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $onlyFiles = array(
+        $onlyFiles = [
             'test.py',
             'foo/bar.tmp',
             'test.php',
@@ -45,21 +45,21 @@ class FileTypeFilterIteratorTest extends RealIteratorTestCase
             'qux_10_2.php',
             'qux_12_0.php',
             'qux_2_0.php',
-        );
+        ];
 
-        $onlyDirectories = array(
+        $onlyDirectories = [
             '.git',
             'foo',
             'qux',
             'toto',
             'toto/.git',
             '.foo',
-        );
+        ];
 
-        return array(
-            array(FileTypeFilterIterator::ONLY_FILES, $this->toAbsolute($onlyFiles)),
-            array(FileTypeFilterIterator::ONLY_DIRECTORIES, $this->toAbsolute($onlyDirectories)),
-        );
+        return [
+            [FileTypeFilterIterator::ONLY_FILES, $this->toAbsolute($onlyFiles)],
+            [FileTypeFilterIterator::ONLY_DIRECTORIES, $this->toAbsolute($onlyDirectories)],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/FilecontentFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/FilecontentFilterIteratorTest.php
index 744bdae12a..f4f70c8e8c 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/FilecontentFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/FilecontentFilterIteratorTest.php
@@ -17,23 +17,23 @@ class FilecontentFilterIteratorTest extends IteratorTestCase
 {
     public function testAccept()
     {
-        $inner = new MockFileListIterator(array('test.txt'));
-        $iterator = new FilecontentFilterIterator($inner, array(), array());
-        $this->assertIterator(array('test.txt'), $iterator);
+        $inner = new MockFileListIterator(['test.txt']);
+        $iterator = new FilecontentFilterIterator($inner, [], []);
+        $this->assertIterator(['test.txt'], $iterator);
     }
 
     public function testDirectory()
     {
-        $inner = new MockFileListIterator(array('directory'));
-        $iterator = new FilecontentFilterIterator($inner, array('directory'), array());
-        $this->assertIterator(array(), $iterator);
+        $inner = new MockFileListIterator(['directory']);
+        $iterator = new FilecontentFilterIterator($inner, ['directory'], []);
+        $this->assertIterator([], $iterator);
     }
 
     public function testUnreadableFile()
     {
-        $inner = new MockFileListIterator(array('file r-'));
-        $iterator = new FilecontentFilterIterator($inner, array('file r-'), array());
-        $this->assertIterator(array(), $iterator);
+        $inner = new MockFileListIterator(['file r-']);
+        $iterator = new FilecontentFilterIterator($inner, ['file r-'], []);
+        $this->assertIterator([], $iterator);
     }
 
     /**
@@ -49,38 +49,38 @@ class FilecontentFilterIteratorTest extends IteratorTestCase
     {
         $inner = new MockFileListIterator();
 
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'a.txt',
             'contents' => 'Lorem ipsum...',
             'type' => 'file',
-            'mode' => 'r+', )
+            'mode' => 'r+', ]
         );
 
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'b.yml',
             'contents' => 'dolor sit...',
             'type' => 'file',
-            'mode' => 'r+', )
+            'mode' => 'r+', ]
         );
 
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'some/other/dir/third.php',
             'contents' => 'amet...',
             'type' => 'file',
-            'mode' => 'r+', )
+            'mode' => 'r+', ]
         );
 
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'unreadable-file.txt',
             'contents' => false,
             'type' => 'file',
-            'mode' => 'r+', )
+            'mode' => 'r+', ]
         );
 
-        return array(
-            array($inner, array('.'), array(), array('a.txt', 'b.yml', 'some/other/dir/third.php')),
-            array($inner, array('ipsum'), array(), array('a.txt')),
-            array($inner, array('i', 'amet'), array('Lorem', 'amet'), array('b.yml')),
-        );
+        return [
+            [$inner, ['.'], [], ['a.txt', 'b.yml', 'some/other/dir/third.php']],
+            [$inner, ['ipsum'], [], ['a.txt']],
+            [$inner, ['i', 'amet'], ['Lorem', 'amet'], ['b.yml']],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/FilenameFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/FilenameFilterIteratorTest.php
index c4b9795918..9270dd1cd3 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/FilenameFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/FilenameFilterIteratorTest.php
@@ -20,7 +20,7 @@ class FilenameFilterIteratorTest extends IteratorTestCase
      */
     public function testAccept($matchPatterns, $noMatchPatterns, $expected)
     {
-        $inner = new InnerNameIterator(array('test.php', 'test.py', 'foo.php'));
+        $inner = new InnerNameIterator(['test.php', 'test.py', 'foo.php']);
 
         $iterator = new FilenameFilterIterator($inner, $matchPatterns, $noMatchPatterns);
 
@@ -29,14 +29,14 @@ class FilenameFilterIteratorTest extends IteratorTestCase
 
     public function getAcceptData()
     {
-        return array(
-            array(array('test.*'), array(), array('test.php', 'test.py')),
-            array(array(), array('test.*'), array('foo.php')),
-            array(array('*.php'), array('test.*'), array('foo.php')),
-            array(array('*.php', '*.py'), array('foo.*'), array('test.php', 'test.py')),
-            array(array('/\.php$/'), array(), array('test.php', 'foo.php')),
-            array(array(), array('/\.php$/'), array('test.py')),
-        );
+        return [
+            [['test.*'], [], ['test.php', 'test.py']],
+            [[], ['test.*'], ['foo.php']],
+            [['*.php'], ['test.*'], ['foo.php']],
+            [['*.php', '*.py'], ['foo.*'], ['test.php', 'test.py']],
+            [['/\.php$/'], [], ['test.php', 'foo.php']],
+            [[], ['/\.php$/'], ['test.py']],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/Iterator.php b/src/Symfony/Component/Finder/Tests/Iterator/Iterator.php
index 849bf081e2..3e21a07004 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/Iterator.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/Iterator.php
@@ -13,9 +13,9 @@ namespace Symfony\Component\Finder\Tests\Iterator;
 
 class Iterator implements \Iterator
 {
-    protected $values = array();
+    protected $values = [];
 
-    public function __construct(array $values = array())
+    public function __construct(array $values = [])
     {
         foreach ($values as $value) {
             $this->attach(new \SplFileInfo($value));
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
index 89f042aefa..796dc6ac36 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/IteratorTestCase.php
@@ -51,7 +51,7 @@ abstract class IteratorTestCase extends TestCase
         $values = array_values(array_map(function (\SplFileInfo $fileinfo) { return $fileinfo->getPathname(); }, iterator_to_array($iterator)));
 
         foreach ($expected as $subarray) {
-            $temp = array();
+            $temp = [];
             while (\count($values) && \count($temp) < \count($subarray)) {
                 $temp[] = array_shift($values);
             }
@@ -69,7 +69,7 @@ abstract class IteratorTestCase extends TestCase
      */
     protected function assertIteratorInForeach($expected, \Traversable $iterator)
     {
-        $values = array();
+        $values = [];
         foreach ($iterator as $file) {
             $this->assertInstanceOf('Symfony\\Component\\Finder\\SplFileInfo', $file);
             $values[] = $file->getPathname();
@@ -89,7 +89,7 @@ abstract class IteratorTestCase extends TestCase
      */
     protected function assertOrderedIteratorInForeach($expected, \Traversable $iterator)
     {
-        $values = array();
+        $values = [];
         foreach ($iterator as $file) {
             $this->assertInstanceOf('Symfony\\Component\\Finder\\SplFileInfo', $file);
             $values[] = $file->getPathname();
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/MockFileListIterator.php b/src/Symfony/Component/Finder/Tests/Iterator/MockFileListIterator.php
index eb0adfad0a..670478d7a7 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/MockFileListIterator.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/MockFileListIterator.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\Finder\Tests\Iterator;
 
 class MockFileListIterator extends \ArrayIterator
 {
-    public function __construct(array $filesArray = array())
+    public function __construct(array $filesArray = [])
     {
         $files = array_map(function ($file) { return new MockSplFileInfo($file); }, $filesArray);
         parent::__construct($files);
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php b/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
index a5ac93a46c..58bb5979e9 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/MockSplFileInfo.php
@@ -28,14 +28,14 @@ class MockSplFileInfo extends \SplFileInfo
         if (\is_string($param)) {
             parent::__construct($param);
         } elseif (\is_array($param)) {
-            $defaults = array(
+            $defaults = [
                 'name' => 'file.txt',
                 'contents' => null,
                 'mode' => null,
                 'type' => null,
                 'relativePath' => null,
                 'relativePathname' => null,
-            );
+            ];
             $defaults = array_merge($defaults, $param);
             parent::__construct($defaults['name']);
             $this->setContents($defaults['contents']);
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
index f2c1cd2414..955677695b 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/MultiplePcreFilterIteratorTest.php
@@ -27,24 +27,24 @@ class MultiplePcreFilterIteratorTest extends TestCase
 
     public function getIsRegexFixtures()
     {
-        return array(
-            array('foo', false, 'string'),
-            array(' foo ', false, '" " is not a valid delimiter'),
-            array('\\foo\\', false, '"\\" is not a valid delimiter'),
-            array('afooa', false, '"a" is not a valid delimiter'),
-            array('//', false, 'the pattern should contain at least 1 character'),
-            array('/a/', true, 'valid regex'),
-            array('/foo/', true, 'valid regex'),
-            array('/foo/i', true, 'valid regex with a single modifier'),
-            array('/foo/imsxu', true, 'valid regex with multiple modifiers'),
-            array('#foo#', true, '"#" is a valid delimiter'),
-            array('{foo}', true, '"{,}" is a valid delimiter pair'),
-            array('[foo]', true, '"[,]" is a valid delimiter pair'),
-            array('(foo)', true, '"(,)" is a valid delimiter pair'),
-            array('<foo>', true, '"<,>" is a valid delimiter pair'),
-            array('*foo.*', false, '"*" is not considered as a valid delimiter'),
-            array('?foo.?', false, '"?" is not considered as a valid delimiter'),
-        );
+        return [
+            ['foo', false, 'string'],
+            [' foo ', false, '" " is not a valid delimiter'],
+            ['\\foo\\', false, '"\\" is not a valid delimiter'],
+            ['afooa', false, '"a" is not a valid delimiter'],
+            ['//', false, 'the pattern should contain at least 1 character'],
+            ['/a/', true, 'valid regex'],
+            ['/foo/', true, 'valid regex'],
+            ['/foo/i', true, 'valid regex with a single modifier'],
+            ['/foo/imsxu', true, 'valid regex with multiple modifiers'],
+            ['#foo#', true, '"#" is a valid delimiter'],
+            ['{foo}', true, '"{,}" is a valid delimiter pair'],
+            ['[foo]', true, '"[,]" is a valid delimiter pair'],
+            ['(foo)', true, '"(,)" is a valid delimiter pair'],
+            ['<foo>', true, '"<,>" is a valid delimiter pair'],
+            ['*foo.*', false, '"*" is not considered as a valid delimiter'],
+            ['?foo.?', false, '"?" is not considered as a valid delimiter'],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/PathFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/PathFilterIteratorTest.php
index 38ed966a61..9040ee04c3 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/PathFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/PathFilterIteratorTest.php
@@ -29,54 +29,54 @@ class PathFilterIteratorTest extends IteratorTestCase
         $inner = new MockFileListIterator();
 
         //PATH:   A/B/C/abc.dat
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'abc.dat',
             'relativePathname' => 'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat',
-        ));
+        ]);
 
         //PATH:   A/B/ab.dat
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'ab.dat',
             'relativePathname' => 'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'ab.dat',
-        ));
+        ]);
 
         //PATH:   A/a.dat
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'a.dat',
             'relativePathname' => 'A'.\DIRECTORY_SEPARATOR.'a.dat',
-        ));
+        ]);
 
         //PATH:   copy/A/B/C/abc.dat.copy
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'abc.dat.copy',
             'relativePathname' => 'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'C'.\DIRECTORY_SEPARATOR.'abc.dat',
-        ));
+        ]);
 
         //PATH:   copy/A/B/ab.dat.copy
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'ab.dat.copy',
             'relativePathname' => 'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'B'.\DIRECTORY_SEPARATOR.'ab.dat',
-        ));
+        ]);
 
         //PATH:   copy/A/a.dat.copy
-        $inner[] = new MockSplFileInfo(array(
+        $inner[] = new MockSplFileInfo([
             'name' => 'a.dat.copy',
             'relativePathname' => 'copy'.\DIRECTORY_SEPARATOR.'A'.\DIRECTORY_SEPARATOR.'a.dat',
-        ));
+        ]);
 
-        return array(
-            array($inner, array('/^A/'),       array(), array('abc.dat', 'ab.dat', 'a.dat')),
-            array($inner, array('/^A\/B/'),    array(), array('abc.dat', 'ab.dat')),
-            array($inner, array('/^A\/B\/C/'), array(), array('abc.dat')),
-            array($inner, array('/A\/B\/C/'),  array(), array('abc.dat', 'abc.dat.copy')),
+        return [
+            [$inner, ['/^A/'],       [], ['abc.dat', 'ab.dat', 'a.dat']],
+            [$inner, ['/^A\/B/'],    [], ['abc.dat', 'ab.dat']],
+            [$inner, ['/^A\/B\/C/'], [], ['abc.dat']],
+            [$inner, ['/A\/B\/C/'], [], ['abc.dat', 'abc.dat.copy']],
 
-            array($inner, array('A'),      array(), array('abc.dat', 'ab.dat', 'a.dat', 'abc.dat.copy', 'ab.dat.copy', 'a.dat.copy')),
-            array($inner, array('A/B'),    array(), array('abc.dat', 'ab.dat', 'abc.dat.copy', 'ab.dat.copy')),
-            array($inner, array('A/B/C'),  array(), array('abc.dat', 'abc.dat.copy')),
+            [$inner, ['A'],      [], ['abc.dat', 'ab.dat', 'a.dat', 'abc.dat.copy', 'ab.dat.copy', 'a.dat.copy']],
+            [$inner, ['A/B'],    [], ['abc.dat', 'ab.dat', 'abc.dat.copy', 'ab.dat.copy']],
+            [$inner, ['A/B/C'], [], ['abc.dat', 'abc.dat.copy']],
 
-            array($inner, array('copy/A'),      array(), array('abc.dat.copy', 'ab.dat.copy', 'a.dat.copy')),
-            array($inner, array('copy/A/B'),    array(), array('abc.dat.copy', 'ab.dat.copy')),
-            array($inner, array('copy/A/B/C'),  array(), array('abc.dat.copy')),
-        );
+            [$inner, ['copy/A'],      [], ['abc.dat.copy', 'ab.dat.copy', 'a.dat.copy']],
+            [$inner, ['copy/A/B'],    [], ['abc.dat.copy', 'ab.dat.copy']],
+            [$inner, ['copy/A/B/C'], [], ['abc.dat.copy']],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php b/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
index 9aa68ea20d..bd14167ab8 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/RealIteratorTestCase.php
@@ -20,7 +20,7 @@ abstract class RealIteratorTestCase extends IteratorTestCase
     {
         self::$tmpDir = realpath(sys_get_temp_dir()).\DIRECTORY_SEPARATOR.'symfony_finder';
 
-        self::$files = array(
+        self::$files = [
             '.git/',
             '.foo/',
             '.foo/.bar',
@@ -42,7 +42,7 @@ abstract class RealIteratorTestCase extends IteratorTestCase
             'qux/',
             'qux/baz_1_2.py',
             'qux/baz_100_1.py',
-        );
+        ];
 
         self::$files = self::toAbsolute(self::$files);
 
@@ -97,7 +97,7 @@ abstract class RealIteratorTestCase extends IteratorTestCase
         }
 
         if (\is_array($files)) {
-            $f = array();
+            $f = [];
             foreach ($files as $file) {
                 if (\is_array($file)) {
                     $f[] = self::toAbsolute($file);
@@ -118,7 +118,7 @@ abstract class RealIteratorTestCase extends IteratorTestCase
 
     protected static function toAbsoluteFixtures($files)
     {
-        $f = array();
+        $f = [];
         foreach ($files as $file) {
             $f[] = realpath(__DIR__.\DIRECTORY_SEPARATOR.'..'.\DIRECTORY_SEPARATOR.'Fixtures'.\DIRECTORY_SEPARATOR.$file);
         }
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php
index 0c9aca24b9..037810aea7 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/RecursiveDirectoryIteratorTest.php
@@ -42,11 +42,11 @@ class RecursiveDirectoryIteratorTest extends IteratorTestCase
             $this->markTestSkipped('Unsupported stream "ftp".');
         }
 
-        $contains = array(
+        $contains = [
             'ftp://speedtest.tele2.net'.\DIRECTORY_SEPARATOR.'1000GB.zip',
             'ftp://speedtest.tele2.net'.\DIRECTORY_SEPARATOR.'100GB.zip',
-        );
-        $actual = array();
+        ];
+        $actual = [];
 
         $i->seek(0);
         $actual[] = $i->getPathname();
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/SizeRangeFilterIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/SizeRangeFilterIteratorTest.php
index 0ee463c6fc..1c0381fef8 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/SizeRangeFilterIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/SizeRangeFilterIteratorTest.php
@@ -30,7 +30,7 @@ class SizeRangeFilterIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $lessThan1KGreaterThan05K = array(
+        $lessThan1KGreaterThan05K = [
             '.foo',
             '.git',
             'foo',
@@ -38,11 +38,11 @@ class SizeRangeFilterIteratorTest extends RealIteratorTestCase
             'test.php',
             'toto',
             'toto/.git',
-        );
+        ];
 
-        return array(
-            array(array(new NumberComparator('< 1K'), new NumberComparator('> 0.5K')), $this->toAbsolute($lessThan1KGreaterThan05K)),
-        );
+        return [
+            [[new NumberComparator('< 1K'), new NumberComparator('> 0.5K')], $this->toAbsolute($lessThan1KGreaterThan05K)],
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php b/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
index 33687c5214..e9dad1e056 100644
--- a/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
+++ b/src/Symfony/Component/Finder/Tests/Iterator/SortableIteratorTest.php
@@ -18,7 +18,7 @@ class SortableIteratorTest extends RealIteratorTestCase
     public function testConstructor()
     {
         try {
-            new SortableIterator(new Iterator(array()), 'foobar');
+            new SortableIterator(new Iterator([]), 'foobar');
             $this->fail('__construct() throws an \InvalidArgumentException exception if the mode is not valid');
         } catch (\Exception $e) {
             $this->assertInstanceOf('InvalidArgumentException', $e, '__construct() throws an \InvalidArgumentException exception if the mode is not valid');
@@ -73,7 +73,7 @@ class SortableIteratorTest extends RealIteratorTestCase
 
     public function getAcceptData()
     {
-        $sortByName = array(
+        $sortByName = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -95,9 +95,9 @@ class SortableIteratorTest extends RealIteratorTestCase
             'test.py',
             'toto',
             'toto/.git',
-        );
+        ];
 
-        $sortByType = array(
+        $sortByType = [
             '.foo',
             '.git',
             'foo',
@@ -119,13 +119,13 @@ class SortableIteratorTest extends RealIteratorTestCase
             'qux_2_0.php',
             'test.php',
             'test.py',
-        );
+        ];
 
-        $sortByAccessedTime = array(
+        $sortByAccessedTime = [
             // For these two files the access time was set to 2005-10-15
-            array('foo/bar.tmp', 'test.php'),
+            ['foo/bar.tmp', 'test.php'],
             // These files were created more or less at the same time
-            array(
+            [
                 '.git',
                 '.foo',
                 '.foo/.bar',
@@ -144,13 +144,13 @@ class SortableIteratorTest extends RealIteratorTestCase
                 'qux_10_2.php',
                 'qux_12_0.php',
                 'qux_2_0.php',
-            ),
+            ],
             // This file was accessed after sleeping for 1 sec
-            array('.bar'),
-        );
+            ['.bar'],
+        ];
 
-        $sortByChangedTime = array(
-            array(
+        $sortByChangedTime = [
+            [
                 '.git',
                 '.foo',
                 '.foo/.bar',
@@ -170,13 +170,13 @@ class SortableIteratorTest extends RealIteratorTestCase
                 'qux_10_2.php',
                 'qux_12_0.php',
                 'qux_2_0.php',
-            ),
-            array('test.php'),
-            array('test.py'),
-        );
+            ],
+            ['test.php'],
+            ['test.py'],
+        ];
 
-        $sortByModifiedTime = array(
-            array(
+        $sortByModifiedTime = [
+            [
                 '.git',
                 '.foo',
                 '.foo/.bar',
@@ -196,12 +196,12 @@ class SortableIteratorTest extends RealIteratorTestCase
                 'qux_10_2.php',
                 'qux_12_0.php',
                 'qux_2_0.php',
-            ),
-            array('test.php'),
-            array('test.py'),
-        );
+            ],
+            ['test.php'],
+            ['test.py'],
+        ];
 
-        $sortByNameNatural = array(
+        $sortByNameNatural = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -223,9 +223,9 @@ class SortableIteratorTest extends RealIteratorTestCase
             'test.py',
             'toto',
             'toto/.git',
-        );
+        ];
 
-        $customComparison = array(
+        $customComparison = [
             '.bar',
             '.foo',
             '.foo/.bar',
@@ -247,16 +247,16 @@ class SortableIteratorTest extends RealIteratorTestCase
             'test.py',
             'toto',
             'toto/.git',
-        );
+        ];
 
-        return array(
-            array(SortableIterator::SORT_BY_NAME, $this->toAbsolute($sortByName)),
-            array(SortableIterator::SORT_BY_TYPE, $this->toAbsolute($sortByType)),
-            array(SortableIterator::SORT_BY_ACCESSED_TIME, $this->toAbsolute($sortByAccessedTime)),
-            array(SortableIterator::SORT_BY_CHANGED_TIME, $this->toAbsolute($sortByChangedTime)),
-            array(SortableIterator::SORT_BY_MODIFIED_TIME, $this->toAbsolute($sortByModifiedTime)),
-            array(SortableIterator::SORT_BY_NAME_NATURAL, $this->toAbsolute($sortByNameNatural)),
-            array(function (\SplFileInfo $a, \SplFileInfo $b) { return strcmp($a->getRealPath(), $b->getRealPath()); }, $this->toAbsolute($customComparison)),
-        );
+        return [
+            [SortableIterator::SORT_BY_NAME, $this->toAbsolute($sortByName)],
+            [SortableIterator::SORT_BY_TYPE, $this->toAbsolute($sortByType)],
+            [SortableIterator::SORT_BY_ACCESSED_TIME, $this->toAbsolute($sortByAccessedTime)],
+            [SortableIterator::SORT_BY_CHANGED_TIME, $this->toAbsolute($sortByChangedTime)],
+            [SortableIterator::SORT_BY_MODIFIED_TIME, $this->toAbsolute($sortByModifiedTime)],
+            [SortableIterator::SORT_BY_NAME_NATURAL, $this->toAbsolute($sortByNameNatural)],
+            [function (\SplFileInfo $a, \SplFileInfo $b) { return strcmp($a->getRealPath(), $b->getRealPath()); }, $this->toAbsolute($customComparison)],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/AbstractExtension.php b/src/Symfony/Component/Form/AbstractExtension.php
index 83dd823603..5b437344e8 100644
--- a/src/Symfony/Component/Form/AbstractExtension.php
+++ b/src/Symfony/Component/Form/AbstractExtension.php
@@ -86,7 +86,7 @@ abstract class AbstractExtension implements FormExtensionInterface
 
         return isset($this->typeExtensions[$name])
             ? $this->typeExtensions[$name]
-            : array();
+            : [];
     }
 
     /**
@@ -120,7 +120,7 @@ abstract class AbstractExtension implements FormExtensionInterface
      */
     protected function loadTypes()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -130,7 +130,7 @@ abstract class AbstractExtension implements FormExtensionInterface
      */
     protected function loadTypeExtensions()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -149,7 +149,7 @@ abstract class AbstractExtension implements FormExtensionInterface
      */
     private function initTypes()
     {
-        $this->types = array();
+        $this->types = [];
 
         foreach ($this->loadTypes() as $type) {
             if (!$type instanceof FormTypeInterface) {
@@ -168,7 +168,7 @@ abstract class AbstractExtension implements FormExtensionInterface
      */
     private function initTypeExtensions()
     {
-        $this->typeExtensions = array();
+        $this->typeExtensions = [];
 
         foreach ($this->loadTypeExtensions() as $extension) {
             if (!$extension instanceof FormTypeExtensionInterface) {
@@ -176,7 +176,7 @@ abstract class AbstractExtension implements FormExtensionInterface
             }
 
             if (method_exists($extension, 'getExtendedTypes')) {
-                $extendedTypes = array();
+                $extendedTypes = [];
 
                 foreach ($extension::getExtendedTypes() as $extendedType) {
                     $extendedTypes[] = $extendedType;
@@ -184,7 +184,7 @@ abstract class AbstractExtension implements FormExtensionInterface
             } else {
                 @trigger_error(sprintf('Not implementing the static getExtendedTypes() method in %s when implementing the %s is deprecated since Symfony 4.2. The method will be added to the interface in 5.0.', \get_class($extension), FormTypeExtensionInterface::class), E_USER_DEPRECATED);
 
-                $extendedTypes = array($extension->getExtendedType());
+                $extendedTypes = [$extension->getExtendedType()];
             }
 
             foreach ($extendedTypes as $extendedType) {
diff --git a/src/Symfony/Component/Form/AbstractRendererEngine.php b/src/Symfony/Component/Form/AbstractRendererEngine.php
index 7a419dcaea..5eebb20ac1 100644
--- a/src/Symfony/Component/Form/AbstractRendererEngine.php
+++ b/src/Symfony/Component/Form/AbstractRendererEngine.php
@@ -24,11 +24,11 @@ abstract class AbstractRendererEngine implements FormRendererEngineInterface
     const CACHE_KEY_VAR = 'cache_key';
 
     protected $defaultThemes;
-    protected $themes = array();
-    protected $useDefaultThemes = array();
-    protected $resources = array();
+    protected $themes = [];
+    protected $useDefaultThemes = [];
+    protected $resources = [];
 
-    private $resourceHierarchyLevels = array();
+    private $resourceHierarchyLevels = [];
 
     /**
      * Creates a new renderer engine.
@@ -36,7 +36,7 @@ abstract class AbstractRendererEngine implements FormRendererEngineInterface
      * @param array $defaultThemes The default themes. The type of these
      *                             themes is open to the implementation.
      */
-    public function __construct(array $defaultThemes = array())
+    public function __construct(array $defaultThemes = [])
     {
         $this->defaultThemes = $defaultThemes;
     }
@@ -49,7 +49,7 @@ abstract class AbstractRendererEngine implements FormRendererEngineInterface
         $cacheKey = $view->vars[self::CACHE_KEY_VAR];
 
         // Do not cast, as casting turns objects into arrays of properties
-        $this->themes[$cacheKey] = \is_array($themes) ? $themes : array($themes);
+        $this->themes[$cacheKey] = \is_array($themes) ? $themes : [$themes];
         $this->useDefaultThemes[$cacheKey] = (bool) $useDefaultThemes;
 
         // Unset instead of resetting to an empty array, in order to allow
diff --git a/src/Symfony/Component/Form/Button.php b/src/Symfony/Component/Form/Button.php
index b72e6ae9ee..8ae4946c56 100644
--- a/src/Symfony/Component/Form/Button.php
+++ b/src/Symfony/Component/Form/Button.php
@@ -132,7 +132,7 @@ class Button implements \IteratorAggregate, FormInterface
      *
      * @throws BadMethodCallException
      */
-    public function add($child, $type = null, array $options = array())
+    public function add($child, $type = null, array $options = [])
     {
         throw new BadMethodCallException('Buttons cannot have children.');
     }
@@ -182,7 +182,7 @@ class Button implements \IteratorAggregate, FormInterface
      */
     public function all()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -190,7 +190,7 @@ class Button implements \IteratorAggregate, FormInterface
      */
     public function getErrors($deep = false, $flatten = true)
     {
-        return new FormErrorIterator($this, array());
+        return new FormErrorIterator($this, []);
     }
 
     /**
@@ -234,7 +234,7 @@ class Button implements \IteratorAggregate, FormInterface
      */
     public function getExtraData()
     {
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/ButtonBuilder.php b/src/Symfony/Component/Form/ButtonBuilder.php
index dee7d33d8a..5a67b7d23f 100644
--- a/src/Symfony/Component/Form/ButtonBuilder.php
+++ b/src/Symfony/Component/Form/ButtonBuilder.php
@@ -45,7 +45,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
     /**
      * @var array
      */
-    private $attributes = array();
+    private $attributes = [];
 
     /**
      * @var array
@@ -55,7 +55,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
     /**
      * @throws InvalidArgumentException if the name is empty
      */
-    public function __construct(?string $name, array $options = array())
+    public function __construct(?string $name, array $options = [])
     {
         if ('' === $name || null === $name) {
             throw new InvalidArgumentException('Buttons cannot have empty names.');
@@ -76,7 +76,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
      *
      * @throws BadMethodCallException
      */
-    public function add($child, $type = null, array $options = array())
+    public function add($child, $type = null, array $options = [])
     {
         throw new BadMethodCallException('Buttons cannot have children.');
     }
@@ -92,7 +92,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
      *
      * @throws BadMethodCallException
      */
-    public function create($name, $type = null, array $options = array())
+    public function create($name, $type = null, array $options = [])
     {
         throw new BadMethodCallException('Buttons cannot have children.');
     }
@@ -144,7 +144,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
      */
     public function all()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -582,7 +582,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
      */
     public function getViewTransformers()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -592,7 +592,7 @@ class ButtonBuilder implements \IteratorAggregate, FormBuilderInterface
      */
     public function getModelTransformers()
     {
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/CHANGELOG.md b/src/Symfony/Component/Form/CHANGELOG.md
index 45e085d488..17c3839090 100644
--- a/src/Symfony/Component/Form/CHANGELOG.md
+++ b/src/Symfony/Component/Form/CHANGELOG.md
@@ -33,7 +33,7 @@ CHANGELOG
    {
        public static function getExtendedTypes(): iterable
        {
-           return array(FormType::class);
+           return [FormType::class];
        }
 
        // ...
diff --git a/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php b/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
index c77882e915..b24f32a8cd 100644
--- a/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
+++ b/src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php
@@ -132,7 +132,7 @@ class ArrayChoiceList implements ChoiceListInterface
      */
     public function getChoicesForValues(array $values)
     {
-        $choices = array();
+        $choices = [];
 
         foreach ($values as $i => $givenValue) {
             if (array_key_exists($givenValue, $this->choices)) {
@@ -148,11 +148,11 @@ class ArrayChoiceList implements ChoiceListInterface
      */
     public function getValuesForChoices(array $choices)
     {
-        $values = array();
+        $values = [];
 
         // Use the value callback to compare choices by their values, if present
         if ($this->valueCallback) {
-            $givenValues = array();
+            $givenValues = [];
 
             foreach ($choices as $i => $givenChoice) {
                 $givenValues[$i] = (string) ($this->valueCallback)($givenChoice);
@@ -190,9 +190,9 @@ class ArrayChoiceList implements ChoiceListInterface
     protected function flatten(array $choices, $value, &$choicesByValues, &$keysByValues, &$structuredValues)
     {
         if (null === $choicesByValues) {
-            $choicesByValues = array();
-            $keysByValues = array();
-            $structuredValues = array();
+            $choicesByValues = [];
+            $keysByValues = [];
+            $structuredValues = [];
         }
 
         foreach ($choices as $key => $choice) {
@@ -219,7 +219,7 @@ class ArrayChoiceList implements ChoiceListInterface
      * @return bool returns true if the choices can be cast to strings and
      *              false otherwise
      */
-    private function castableToString(array $choices, array &$cache = array())
+    private function castableToString(array $choices, array &$cache = [])
     {
         foreach ($choices as $choice) {
             if (\is_array($choice)) {
diff --git a/src/Symfony/Component/Form/ChoiceList/ChoiceListInterface.php b/src/Symfony/Component/Form/ChoiceList/ChoiceListInterface.php
index b59e77bf79..c1d643ee73 100644
--- a/src/Symfony/Component/Form/ChoiceList/ChoiceListInterface.php
+++ b/src/Symfony/Component/Form/ChoiceList/ChoiceListInterface.php
@@ -48,19 +48,19 @@ interface ChoiceListInterface
      * keys of the choices. If the original array contained nested arrays, these
      * nested arrays are represented here as well:
      *
-     *     $form->add('field', 'choice', array(
-     *         'choices' => array(
-     *             'Decided' => array('Yes' => true, 'No' => false),
-     *             'Undecided' => array('Maybe' => null),
-     *         ),
-     *     ));
+     *     $form->add('field', 'choice', [
+     *         'choices' => [
+     *             'Decided' => ['Yes' => true, 'No' => false],
+     *             'Undecided' => ['Maybe' => null],
+     *         ],
+     *     ]);
      *
      * In this example, the result of this method is:
      *
-     *     array(
-     *         'Decided' => array('Yes' => '0', 'No' => '1'),
-     *         'Undecided' => array('Maybe' => '2'),
-     *     )
+     *     [
+     *         'Decided' => ['Yes' => '0', 'No' => '1'],
+     *         'Undecided' => ['Maybe' => '2'],
+     *     ]
      *
      * @return string[] The choice values
      */
@@ -73,12 +73,12 @@ interface ChoiceListInterface
      * "choice" option of the choice type. Note that this array may contain
      * duplicates if the "choice" option contained choice groups:
      *
-     *     $form->add('field', 'choice', array(
-     *         'choices' => array(
-     *             'Decided' => array(true, false),
-     *             'Undecided' => array(null),
-     *         ),
-     *     ));
+     *     $form->add('field', 'choice', [
+     *         'choices' => [
+     *             'Decided' => [true, false],
+     *             'Undecided' => [null],
+     *         ],
+     *     ]);
      *
      * In this example, the original key 0 appears twice, once for `true` and
      * once for `null`.
diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
index ece33ad65c..477afbbb07 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
@@ -27,12 +27,12 @@ class CachingFactoryDecorator implements ChoiceListFactoryInterface
     /**
      * @var ChoiceListInterface[]
      */
-    private $lists = array();
+    private $lists = [];
 
     /**
      * @var ChoiceListView[]
      */
-    private $views = array();
+    private $views = [];
 
     /**
      * Generates a SHA-256 hash for the given value.
@@ -89,7 +89,7 @@ class CachingFactoryDecorator implements ChoiceListFactoryInterface
         // The value is not validated on purpose. The decorated factory may
         // decide which values to accept and which not.
 
-        $hash = self::generateHash(array($choices, $value), 'fromChoices');
+        $hash = self::generateHash([$choices, $value], 'fromChoices');
 
         if (!isset($this->lists[$hash])) {
             $this->lists[$hash] = $this->decoratedFactory->createListFromChoices($choices, $value);
@@ -103,7 +103,7 @@ class CachingFactoryDecorator implements ChoiceListFactoryInterface
      */
     public function createListFromLoader(ChoiceLoaderInterface $loader, $value = null)
     {
-        $hash = self::generateHash(array($loader, $value), 'fromLoader');
+        $hash = self::generateHash([$loader, $value], 'fromLoader');
 
         if (!isset($this->lists[$hash])) {
             $this->lists[$hash] = $this->decoratedFactory->createListFromLoader($loader, $value);
@@ -119,7 +119,7 @@ class CachingFactoryDecorator implements ChoiceListFactoryInterface
     {
         // The input is not validated on purpose. This way, the decorated
         // factory may decide which input to accept and which not.
-        $hash = self::generateHash(array($list, $preferredChoices, $label, $index, $groupBy, $attr));
+        $hash = self::generateHash([$list, $preferredChoices, $label, $index, $groupBy, $attr]);
 
         if (!isset($this->views[$hash])) {
             $this->views[$hash] = $this->decoratedFactory->createView(
diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php b/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
index d5d251a319..5383f2a783 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/DefaultChoiceListFactory.php
@@ -47,8 +47,8 @@ class DefaultChoiceListFactory implements ChoiceListFactoryInterface
      */
     public function createView(ChoiceListInterface $list, $preferredChoices = null, $label = null, $index = null, $groupBy = null, $attr = null)
     {
-        $preferredViews = array();
-        $otherViews = array();
+        $preferredViews = [];
+        $otherViews = [];
         $choices = $list->getChoices();
         $keys = $list->getOriginalKeys();
 
@@ -137,7 +137,7 @@ class DefaultChoiceListFactory implements ChoiceListFactoryInterface
             $label,
             // The attributes may be a callable or a mapping from choice indices
             // to nested arrays
-            \is_callable($attr) ? $attr($choice, $key, $value) : (isset($attr[$key]) ? $attr[$key] : array())
+            \is_callable($attr) ? $attr($choice, $key, $value) : (isset($attr[$key]) ? $attr[$key] : [])
         );
 
         // $isPreferred may be null if no choices are preferred
@@ -157,8 +157,8 @@ class DefaultChoiceListFactory implements ChoiceListFactoryInterface
 
             // Add the contents of groups to new ChoiceGroupView instances
             if (\is_array($value)) {
-                $preferredViewsForGroup = array();
-                $otherViewsForGroup = array();
+                $preferredViewsForGroup = [];
+                $otherViewsForGroup = [];
 
                 self::addChoiceViewsGroupedBy(
                     $value,
diff --git a/src/Symfony/Component/Form/ChoiceList/Loader/CallbackChoiceLoader.php b/src/Symfony/Component/Form/ChoiceList/Loader/CallbackChoiceLoader.php
index 066aaf4f59..2d6782f558 100644
--- a/src/Symfony/Component/Form/ChoiceList/Loader/CallbackChoiceLoader.php
+++ b/src/Symfony/Component/Form/ChoiceList/Loader/CallbackChoiceLoader.php
@@ -56,7 +56,7 @@ class CallbackChoiceLoader implements ChoiceLoaderInterface
     {
         // Optimize
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -69,7 +69,7 @@ class CallbackChoiceLoader implements ChoiceLoaderInterface
     {
         // Optimize
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getValuesForChoices($choices);
diff --git a/src/Symfony/Component/Form/ChoiceList/Loader/IntlCallbackChoiceLoader.php b/src/Symfony/Component/Form/ChoiceList/Loader/IntlCallbackChoiceLoader.php
index 687c0197ae..1a119bb96c 100644
--- a/src/Symfony/Component/Form/ChoiceList/Loader/IntlCallbackChoiceLoader.php
+++ b/src/Symfony/Component/Form/ChoiceList/Loader/IntlCallbackChoiceLoader.php
@@ -27,7 +27,7 @@ class IntlCallbackChoiceLoader extends CallbackChoiceLoader
         // Optimize
         $values = array_filter($values);
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -41,7 +41,7 @@ class IntlCallbackChoiceLoader extends CallbackChoiceLoader
         // Optimize
         $choices = array_filter($choices);
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // If no callable is set, choices are the same as values
diff --git a/src/Symfony/Component/Form/ChoiceList/View/ChoiceGroupView.php b/src/Symfony/Component/Form/ChoiceList/View/ChoiceGroupView.php
index 17546182d5..dd80486c9a 100644
--- a/src/Symfony/Component/Form/ChoiceList/View/ChoiceGroupView.php
+++ b/src/Symfony/Component/Form/ChoiceList/View/ChoiceGroupView.php
@@ -27,7 +27,7 @@ class ChoiceGroupView implements \IteratorAggregate
      * @param string                         $label   The label of the group
      * @param ChoiceGroupView[]|ChoiceView[] $choices the choice views in the group
      */
-    public function __construct($label, array $choices = array())
+    public function __construct($label, array $choices = [])
     {
         $this->label = $label;
         $this->choices = $choices;
diff --git a/src/Symfony/Component/Form/ChoiceList/View/ChoiceListView.php b/src/Symfony/Component/Form/ChoiceList/View/ChoiceListView.php
index add892aab6..586269b516 100644
--- a/src/Symfony/Component/Form/ChoiceList/View/ChoiceListView.php
+++ b/src/Symfony/Component/Form/ChoiceList/View/ChoiceListView.php
@@ -31,7 +31,7 @@ class ChoiceListView
      * @param ChoiceGroupView[]|ChoiceView[] $choices          The choice views
      * @param ChoiceGroupView[]|ChoiceView[] $preferredChoices the preferred choice views
      */
-    public function __construct(array $choices = array(), array $preferredChoices = array())
+    public function __construct(array $choices = [], array $preferredChoices = [])
     {
         $this->choices = $choices;
         $this->preferredChoices = $preferredChoices;
diff --git a/src/Symfony/Component/Form/ChoiceList/View/ChoiceView.php b/src/Symfony/Component/Form/ChoiceList/View/ChoiceView.php
index eb27f0891d..3bc9cdd6c9 100644
--- a/src/Symfony/Component/Form/ChoiceList/View/ChoiceView.php
+++ b/src/Symfony/Component/Form/ChoiceList/View/ChoiceView.php
@@ -35,7 +35,7 @@ class ChoiceView
      * @param string $label The label displayed to humans
      * @param array  $attr  Additional attributes for the HTML tag
      */
-    public function __construct($data, string $value, $label, array $attr = array())
+    public function __construct($data, string $value, $label, array $attr = [])
     {
         $this->data = $data;
         $this->value = $value;
diff --git a/src/Symfony/Component/Form/Command/DebugCommand.php b/src/Symfony/Component/Form/Command/DebugCommand.php
index 87924092ed..b0957690c7 100644
--- a/src/Symfony/Component/Form/Command/DebugCommand.php
+++ b/src/Symfony/Component/Form/Command/DebugCommand.php
@@ -38,7 +38,7 @@ class DebugCommand extends Command
     private $extensions;
     private $guessers;
 
-    public function __construct(FormRegistryInterface $formRegistry, array $namespaces = array('Symfony\Component\Form\Extension\Core\Type'), array $types = array(), array $extensions = array(), array $guessers = array())
+    public function __construct(FormRegistryInterface $formRegistry, array $namespaces = ['Symfony\Component\Form\Extension\Core\Type'], array $types = [], array $extensions = [], array $guessers = [])
     {
         parent::__construct();
 
@@ -55,12 +55,12 @@ class DebugCommand extends Command
     protected function configure()
     {
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('class', InputArgument::OPTIONAL, 'The form type class'),
                 new InputArgument('option', InputArgument::OPTIONAL, 'The form type option'),
                 new InputOption('show-deprecated', null, InputOption::VALUE_NONE, 'Display deprecated options in form types'),
                 new InputOption('format', null, InputOption::VALUE_REQUIRED, 'The output format (txt or json)', 'txt'),
-            ))
+            ])
             ->setDescription('Displays form type information')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command displays information about form types.
@@ -153,7 +153,7 @@ EOF
 
     private function getFqcnTypeClass(InputInterface $input, SymfonyStyle $io, $shortClassName)
     {
-        $classes = array();
+        $classes = [];
         sort($this->namespaces);
         foreach ($this->namespaces as $namespace) {
             if (class_exists($fqcn = $namespace.'\\'.$shortClassName)) {
@@ -206,7 +206,7 @@ EOF
 
     private function filterTypesByDeprecated(array $types): array
     {
-        $typesWithDeprecatedOptions = array();
+        $typesWithDeprecatedOptions = [];
         foreach ($types as $class) {
             $optionsResolver = $this->formRegistry->getType($class)->getOptionsResolver();
             foreach ($optionsResolver->getDefinedOptions() as $option) {
@@ -222,7 +222,7 @@ EOF
 
     private function findAlternatives($name, array $collection)
     {
-        $alternatives = array();
+        $alternatives = [];
         foreach ($collection as $item) {
             $lev = levenshtein($name, $item);
             if ($lev <= \strlen($name) / 3 || false !== strpos($item, $name)) {
diff --git a/src/Symfony/Component/Form/Console/Descriptor/Descriptor.php b/src/Symfony/Component/Form/Console/Descriptor/Descriptor.php
index dda755250c..7add269e30 100644
--- a/src/Symfony/Component/Form/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Component/Form/Console/Descriptor/Descriptor.php
@@ -32,20 +32,20 @@ abstract class Descriptor implements DescriptorInterface
     /** @var OutputStyle */
     protected $output;
     protected $type;
-    protected $ownOptions = array();
-    protected $overriddenOptions = array();
-    protected $parentOptions = array();
-    protected $extensionOptions = array();
-    protected $requiredOptions = array();
-    protected $parents = array();
-    protected $extensions = array();
+    protected $ownOptions = [];
+    protected $overriddenOptions = [];
+    protected $parentOptions = [];
+    protected $extensionOptions = [];
+    protected $requiredOptions = [];
+    protected $parents = [];
+    protected $extensions = [];
 
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = array())
+    public function describe(OutputInterface $output, $object, array $options = [])
     {
-        $this->output = $output instanceof OutputStyle ? $output : new SymfonyStyle(new ArrayInput(array()), $output);
+        $this->output = $output instanceof OutputStyle ? $output : new SymfonyStyle(new ArrayInput([]), $output);
 
         switch (true) {
             case null === $object:
@@ -64,14 +64,14 @@ abstract class Descriptor implements DescriptorInterface
 
     abstract protected function describeDefaults(array $options);
 
-    abstract protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = array());
+    abstract protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = []);
 
     abstract protected function describeOption(OptionsResolver $optionsResolver, array $options);
 
     protected function collectOptions(ResolvedFormTypeInterface $type)
     {
-        $this->parents = array();
-        $this->extensions = array();
+        $this->parents = [];
+        $this->extensions = [];
 
         if (null !== $type->getParent()) {
             $optionsResolver = clone $this->getParentOptionsResolver($type->getParent());
@@ -83,7 +83,7 @@ abstract class Descriptor implements DescriptorInterface
         $this->ownOptions = array_diff($ownOptionsResolver->getDefinedOptions(), $optionsResolver->getDefinedOptions());
         $overriddenOptions = array_intersect(array_merge($ownOptionsResolver->getDefinedOptions(), $ownOptionsResolver->getUndefinedOptions()), $optionsResolver->getDefinedOptions());
 
-        $this->parentOptions = array();
+        $this->parentOptions = [];
         foreach ($this->parents as $class => $parentOptions) {
             $this->overriddenOptions[$class] = array_intersect($overriddenOptions, $parentOptions);
             $this->parentOptions[$class] = array_diff($parentOptions, $overriddenOptions);
@@ -91,7 +91,7 @@ abstract class Descriptor implements DescriptorInterface
 
         $type->getInnerType()->configureOptions($optionsResolver);
         $this->collectTypeExtensionsOptions($type, $optionsResolver);
-        $this->extensionOptions = array();
+        $this->extensionOptions = [];
         foreach ($this->extensions as $class => $extensionOptions) {
             $this->overriddenOptions[$class] = array_intersect($overriddenOptions, $extensionOptions);
             $this->extensionOptions[$class] = array_diff($extensionOptions, $overriddenOptions);
@@ -108,21 +108,21 @@ abstract class Descriptor implements DescriptorInterface
 
     protected function getOptionDefinition(OptionsResolver $optionsResolver, $option)
     {
-        $definition = array(
+        $definition = [
             'required' => $optionsResolver->isRequired($option),
             'deprecated' => $optionsResolver->isDeprecated($option),
-        );
+        ];
 
         $introspector = new OptionsResolverIntrospector($optionsResolver);
 
-        $map = array(
+        $map = [
             'default' => 'getDefault',
             'lazy' => 'getLazyClosures',
             'allowedTypes' => 'getAllowedTypes',
             'allowedValues' => 'getAllowedValues',
             'normalizer' => 'getNormalizer',
             'deprecationMessage' => 'getDeprecationMessage',
-        );
+        ];
 
         foreach ($map as $key => $method) {
             try {
@@ -133,7 +133,7 @@ abstract class Descriptor implements DescriptorInterface
         }
 
         if (isset($definition['deprecationMessage']) && \is_string($definition['deprecationMessage'])) {
-            $definition['deprecationMessage'] = strtr($definition['deprecationMessage'], array('%name%' => $option));
+            $definition['deprecationMessage'] = strtr($definition['deprecationMessage'], ['%name%' => $option]);
         }
 
         return $definition;
@@ -141,7 +141,7 @@ abstract class Descriptor implements DescriptorInterface
 
     protected function filterOptionsByDeprecated(ResolvedFormTypeInterface $type)
     {
-        $deprecatedOptions = array();
+        $deprecatedOptions = [];
         $resolver = $type->getOptionsResolver();
         foreach ($resolver->getDefinedOptions() as $option) {
             if ($resolver->isDeprecated($option)) {
@@ -169,7 +169,7 @@ abstract class Descriptor implements DescriptorInterface
 
     private function getParentOptionsResolver(ResolvedFormTypeInterface $type)
     {
-        $this->parents[$class = \get_class($type->getInnerType())] = array();
+        $this->parents[$class = \get_class($type->getInnerType())] = [];
 
         if (null !== $type->getParent()) {
             $optionsResolver = clone $this->getParentOptionsResolver($type->getParent());
diff --git a/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
index 773d993399..31d9aa485e 100644
--- a/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Component/Form/Console/Descriptor/JsonDescriptor.php
@@ -33,7 +33,7 @@ class JsonDescriptor extends Descriptor
         $this->writeData($data, $options);
     }
 
-    protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = array())
+    protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = [])
     {
         $this->collectOptions($resolvedFormType);
 
@@ -41,22 +41,22 @@ class JsonDescriptor extends Descriptor
             $this->filterOptionsByDeprecated($resolvedFormType);
         }
 
-        $formOptions = array(
+        $formOptions = [
             'own' => $this->ownOptions,
             'overridden' => $this->overriddenOptions,
             'parent' => $this->parentOptions,
             'extension' => $this->extensionOptions,
             'required' => $this->requiredOptions,
-        );
+        ];
         $this->sortOptions($formOptions);
 
-        $data = array(
+        $data = [
             'class' => \get_class($resolvedFormType->getInnerType()),
             'block_prefix' => $resolvedFormType->getInnerType()->getBlockPrefix(),
             'options' => $formOptions,
             'parent_types' => $this->parents,
             'type_extensions' => $this->extensions,
-        );
+        ];
 
         $this->writeData($data, $options);
     }
@@ -65,19 +65,19 @@ class JsonDescriptor extends Descriptor
     {
         $definition = $this->getOptionDefinition($optionsResolver, $options['option']);
 
-        $map = array();
+        $map = [];
         if ($definition['deprecated']) {
             $map['deprecated'] = 'deprecated';
             if (\is_string($definition['deprecationMessage'])) {
                 $map['deprecation_message'] = 'deprecationMessage';
             }
         }
-        $map += array(
+        $map += [
             'required' => 'required',
             'default' => 'default',
             'allowed_types' => 'allowedTypes',
             'allowed_values' => 'allowedValues',
-        );
+        ];
         foreach ($map as $label => $name) {
             if (array_key_exists($name, $definition)) {
                 $data[$label] = $definition[$name];
diff --git a/src/Symfony/Component/Form/Console/Descriptor/TextDescriptor.php b/src/Symfony/Component/Form/Console/Descriptor/TextDescriptor.php
index 1621f9d31c..4ea8ab6d83 100644
--- a/src/Symfony/Component/Form/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Component/Form/Console/Descriptor/TextDescriptor.php
@@ -53,7 +53,7 @@ class TextDescriptor extends Descriptor
         }
     }
 
-    protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = array())
+    protected function describeResolvedFormType(ResolvedFormTypeInterface $resolvedFormType, array $options = [])
     {
         $this->collectOptions($resolvedFormType);
 
@@ -61,20 +61,20 @@ class TextDescriptor extends Descriptor
             $this->filterOptionsByDeprecated($resolvedFormType);
         }
 
-        $formOptions = $this->normalizeAndSortOptionsColumns(array_filter(array(
+        $formOptions = $this->normalizeAndSortOptionsColumns(array_filter([
             'own' => $this->ownOptions,
             'overridden' => $this->overriddenOptions,
             'parent' => $this->parentOptions,
             'extension' => $this->extensionOptions,
-        )));
+        ]));
 
         // setting headers and column order
-        $tableHeaders = array_intersect_key(array(
+        $tableHeaders = array_intersect_key([
             'own' => 'Options',
             'overridden' => 'Overridden options',
             'parent' => 'Parent options',
             'extension' => 'Extension options',
-        ), $formOptions);
+        ], $formOptions);
 
         $this->output->title(sprintf('%s (Block prefix: "%s")', \get_class($resolvedFormType->getInnerType()), $resolvedFormType->getInnerType()->getBlockPrefix()));
 
@@ -98,42 +98,42 @@ class TextDescriptor extends Descriptor
         $definition = $this->getOptionDefinition($optionsResolver, $options['option']);
 
         $dump = $this->getDumpFunction();
-        $map = array();
+        $map = [];
         if ($definition['deprecated']) {
-            $map = array(
+            $map = [
                 'Deprecated' => 'deprecated',
                 'Deprecation message' => 'deprecationMessage',
-            );
+            ];
         }
-        $map += array(
+        $map += [
             'Required' => 'required',
             'Default' => 'default',
             'Allowed types' => 'allowedTypes',
             'Allowed values' => 'allowedValues',
             'Normalizer' => 'normalizer',
-        );
-        $rows = array();
+        ];
+        $rows = [];
         foreach ($map as $label => $name) {
             $value = array_key_exists($name, $definition) ? $dump($definition[$name]) : '-';
             if ('default' === $name && isset($definition['lazy'])) {
                 $value = "Value: $value\n\nClosure(s): ".$dump($definition['lazy']);
             }
 
-            $rows[] = array("<info>$label</info>", $value);
+            $rows[] = ["<info>$label</info>", $value];
             $rows[] = new TableSeparator();
         }
         array_pop($rows);
 
         $this->output->title(sprintf('%s (%s)', \get_class($options['type']), $options['option']));
-        $this->output->table(array(), $rows);
+        $this->output->table([], $rows);
     }
 
     private function buildTableRows(array $headers, array $options): array
     {
-        $tableRows = array();
+        $tableRows = [];
         $count = \count(max($options));
         for ($i = 0; $i < $count; ++$i) {
-            $cells = array();
+            $cells = [];
             foreach (array_keys($headers) as $group) {
                 $option = $options[$group][$i] ?? null;
                 if (\is_string($option) && \in_array($option, $this->requiredOptions, true)) {
@@ -161,7 +161,7 @@ class TextDescriptor extends Descriptor
                 }
 
                 if (!$sorted) {
-                    $options[$group] = array();
+                    $options[$group] = [];
                 } else {
                     $options[$group][] = null;
                 }
@@ -184,15 +184,15 @@ class TextDescriptor extends Descriptor
     private function getDumpFunction()
     {
         $cloner = new VarCloner();
-        $cloner->addCasters(array('Closure' => function ($c, $a) {
+        $cloner->addCasters(['Closure' => function ($c, $a) {
             $prefix = Caster::PREFIX_VIRTUAL;
 
-            return array(
+            return [
                 $prefix.'parameters' => isset($a[$prefix.'parameters']) ? \count($a[$prefix.'parameters']->value) : 0,
                 $prefix.'file' => $a[$prefix.'file'],
                 $prefix.'line' => $a[$prefix.'line'],
-            );
-        }));
+            ];
+        }]);
         $dumper = new CliDumper(null, null, CliDumper::DUMP_LIGHT_ARRAY | CliDumper::DUMP_COMMA_SEPARATOR);
         $dumper->setColors($this->output->isDecorated());
 
diff --git a/src/Symfony/Component/Form/DependencyInjection/FormPass.php b/src/Symfony/Component/Form/DependencyInjection/FormPass.php
index 8b604ccebc..0c6306672d 100644
--- a/src/Symfony/Component/Form/DependencyInjection/FormPass.php
+++ b/src/Symfony/Component/Form/DependencyInjection/FormPass.php
@@ -52,7 +52,7 @@ class FormPass implements CompilerPassInterface
         }
 
         $definition = $container->getDefinition($this->formExtensionService);
-        if (new IteratorArgument(array()) != $definition->getArgument(2)) {
+        if (new IteratorArgument([]) != $definition->getArgument(2)) {
             return;
         }
         $definition->replaceArgument(0, $this->processFormTypes($container));
@@ -63,8 +63,8 @@ class FormPass implements CompilerPassInterface
     private function processFormTypes(ContainerBuilder $container)
     {
         // Get service locator argument
-        $servicesMap = array();
-        $namespaces = array('Symfony\Component\Form\Extension\Core\Type' => true);
+        $servicesMap = [];
+        $namespaces = ['Symfony\Component\Form\Extension\Core\Type' => true];
 
         // Builds an array with fully-qualified type class names as keys and service IDs as values
         foreach ($container->findTaggedServiceIds($this->formTypeTag, true) as $serviceId => $tag) {
@@ -85,8 +85,8 @@ class FormPass implements CompilerPassInterface
 
     private function processFormTypeExtensions(ContainerBuilder $container)
     {
-        $typeExtensions = array();
-        $typeExtensionsClasses = array();
+        $typeExtensions = [];
+        $typeExtensionsClasses = [];
         foreach ($this->findAndSortTaggedServices($this->formTypeExtensionTag, $container) as $reference) {
             $serviceId = (string) $reference;
             $serviceDefinition = $container->getDefinition($serviceId);
@@ -130,8 +130,8 @@ class FormPass implements CompilerPassInterface
 
     private function processFormTypeGuessers(ContainerBuilder $container)
     {
-        $guessers = array();
-        $guessersClasses = array();
+        $guessers = [];
+        $guessersClasses = [];
         foreach ($container->findTaggedServiceIds($this->formTypeGuesserTag, true) as $serviceId => $tags) {
             $guessers[] = new Reference($serviceId);
 
diff --git a/src/Symfony/Component/Form/Extension/Core/CoreExtension.php b/src/Symfony/Component/Form/Extension/Core/CoreExtension.php
index 5b01e9e90a..4eb980bf9c 100644
--- a/src/Symfony/Component/Form/Extension/Core/CoreExtension.php
+++ b/src/Symfony/Component/Form/Extension/Core/CoreExtension.php
@@ -41,7 +41,7 @@ class CoreExtension extends AbstractExtension
 
     protected function loadTypes()
     {
-        return array(
+        return [
             new Type\FormType($this->propertyAccessor),
             new Type\BirthdayType(),
             new Type\CheckboxType(),
@@ -76,13 +76,13 @@ class CoreExtension extends AbstractExtension
             new Type\CurrencyType(),
             new Type\TelType(),
             new Type\ColorType(),
-        );
+        ];
     }
 
     protected function loadTypeExtensions()
     {
-        return array(
+        return [
             new TransformationFailureExtension($this->translator),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php b/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
index 5e21010222..ddc771fe25 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataMapper/CheckboxListMapper.php
@@ -31,7 +31,7 @@ class CheckboxListMapper implements DataMapperInterface
     public function mapDataToForms($choices, $checkboxes)
     {
         if (null === $choices) {
-            $choices = array();
+            $choices = [];
         }
 
         if (!\is_array($choices)) {
@@ -53,7 +53,7 @@ class CheckboxListMapper implements DataMapperInterface
             throw new UnexpectedTypeException($choices, 'array');
         }
 
-        $values = array();
+        $values = [];
 
         foreach ($checkboxes as $checkbox) {
             if ($checkbox->getData()) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php b/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
index 9e86310b22..92187d772c 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataMapper/PropertyPathMapper.php
@@ -35,7 +35,7 @@ class PropertyPathMapper implements DataMapperInterface
      */
     public function mapDataToForms($data, $forms)
     {
-        $empty = null === $data || array() === $data;
+        $empty = null === $data || [] === $data;
 
         if (!$empty && !\is_array($data) && !\is_object($data)) {
             throw new UnexpectedTypeException($data, 'object, array or empty');
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
index b09fba8532..2879dffdbc 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ArrayToPartsTransformer.php
@@ -29,14 +29,14 @@ class ArrayToPartsTransformer implements DataTransformerInterface
     public function transform($array)
     {
         if (null === $array) {
-            $array = array();
+            $array = [];
         }
 
         if (!\is_array($array)) {
             throw new TransformationFailedException('Expected an array.');
         }
 
-        $result = array();
+        $result = [];
 
         foreach ($this->partMapping as $partKey => $originalKeys) {
             if (empty($array)) {
@@ -55,8 +55,8 @@ class ArrayToPartsTransformer implements DataTransformerInterface
             throw new TransformationFailedException('Expected an array.');
         }
 
-        $result = array();
-        $emptyKeys = array();
+        $result = [];
+        $emptyKeys = [];
 
         foreach ($this->partMapping as $partKey => $originalKeys) {
             if (!empty($array[$partKey])) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
index 7652621b65..c95eb7db21 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
@@ -16,13 +16,13 @@ use Symfony\Component\Form\Exception\InvalidArgumentException;
 
 abstract class BaseDateTimeTransformer implements DataTransformerInterface
 {
-    protected static $formats = array(
+    protected static $formats = [
         \IntlDateFormatter::NONE,
         \IntlDateFormatter::FULL,
         \IntlDateFormatter::LONG,
         \IntlDateFormatter::MEDIUM,
         \IntlDateFormatter::SHORT,
-    );
+    ];
 
     protected $inputTimezone;
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
index 267aa35554..dca727faee 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BooleanToStringTransformer.php
@@ -31,7 +31,7 @@ class BooleanToStringTransformer implements DataTransformerInterface
      * @param string $trueValue   The value emitted upon transform if the input is true
      * @param array  $falseValues
      */
-    public function __construct(string $trueValue, array $falseValues = array(null))
+    public function __construct(string $trueValue, array $falseValues = [null])
     {
         $this->trueValue = $trueValue;
         $this->falseValues = $falseValues;
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
index 1154ad08a5..fae30857ff 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php
@@ -29,7 +29,7 @@ class ChoiceToValueTransformer implements DataTransformerInterface
 
     public function transform($choice)
     {
-        return (string) current($this->choiceList->getValuesForChoices(array($choice)));
+        return (string) current($this->choiceList->getValuesForChoices([$choice]));
     }
 
     public function reverseTransform($value)
@@ -38,7 +38,7 @@ class ChoiceToValueTransformer implements DataTransformerInterface
             throw new TransformationFailedException('Expected a string or null.');
         }
 
-        $choices = $this->choiceList->getChoicesForValues(array((string) $value));
+        $choices = $this->choiceList->getChoicesForValues([(string) $value]);
 
         if (1 !== \count($choices)) {
             if (null === $value || '' === $value) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
index 835d51cddb..ac2108f0c4 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ChoicesToValuesTransformer.php
@@ -35,7 +35,7 @@ class ChoicesToValuesTransformer implements DataTransformerInterface
     public function transform($array)
     {
         if (null === $array) {
-            return array();
+            return [];
         }
 
         if (!\is_array($array)) {
@@ -55,7 +55,7 @@ class ChoicesToValuesTransformer implements DataTransformerInterface
     public function reverseTransform($array)
     {
         if (null === $array) {
-            return array();
+            return [];
         }
 
         if (!\is_array($array)) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
index b7f3267b12..75e06833ef 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
@@ -30,7 +30,7 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
     const SECONDS = 'seconds';
     const INVERT = 'invert';
 
-    private static $availableFields = array(
+    private static $availableFields = [
         self::YEARS => 'y',
         self::MONTHS => 'm',
         self::DAYS => 'd',
@@ -38,7 +38,7 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
         self::MINUTES => 'i',
         self::SECONDS => 's',
         self::INVERT => 'r',
-    );
+    ];
     private $fields;
     private $pad;
 
@@ -49,7 +49,7 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
     public function __construct(array $fields = null, bool $pad = false)
     {
         if (null === $fields) {
-            $fields = array('years', 'months', 'days', 'hours', 'minutes', 'seconds', 'invert');
+            $fields = ['years', 'months', 'days', 'hours', 'minutes', 'seconds', 'invert'];
         }
         $this->fields = $fields;
         $this->pad = $pad;
@@ -68,7 +68,7 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
     {
         if (null === $dateInterval) {
             return array_intersect_key(
-                array(
+                [
                     'years' => '',
                     'months' => '',
                     'weeks' => '',
@@ -77,14 +77,14 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
                     'minutes' => '',
                     'seconds' => '',
                     'invert' => false,
-                ),
+                ],
                 array_flip($this->fields)
             );
         }
         if (!$dateInterval instanceof \DateInterval) {
             throw new UnexpectedTypeException($dateInterval, '\DateInterval');
         }
-        $result = array();
+        $result = [];
         foreach (self::$availableFields as $field => $char) {
             $result[$field] = $dateInterval->format('%'.($this->pad ? strtoupper($char) : $char));
         }
@@ -122,7 +122,7 @@ class DateIntervalToArrayTransformer implements DataTransformerInterface
         if ('' === implode('', $value)) {
             return;
         }
-        $emptyFields = array();
+        $emptyFields = [];
         foreach ($this->fields as $field) {
             if (!isset($value[$field])) {
                 $emptyFields[] = $field;
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
index 4a547dbdce..00600f8487 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToArrayTransformer.php
@@ -36,7 +36,7 @@ class DateTimeToArrayTransformer extends BaseDateTimeTransformer
         parent::__construct($inputTimezone, $outputTimezone);
 
         if (null === $fields) {
-            $fields = array('year', 'month', 'day', 'hour', 'minute', 'second');
+            $fields = ['year', 'month', 'day', 'hour', 'minute', 'second'];
         }
 
         $this->fields = $fields;
@@ -55,14 +55,14 @@ class DateTimeToArrayTransformer extends BaseDateTimeTransformer
     public function transform($dateTime)
     {
         if (null === $dateTime) {
-            return array_intersect_key(array(
+            return array_intersect_key([
                 'year' => '',
                 'month' => '',
                 'day' => '',
                 'hour' => '',
                 'minute' => '',
                 'second' => '',
-            ), array_flip($this->fields));
+            ], array_flip($this->fields));
         }
 
         if (!$dateTime instanceof \DateTimeInterface) {
@@ -77,14 +77,14 @@ class DateTimeToArrayTransformer extends BaseDateTimeTransformer
             $dateTime = $dateTime->setTimezone(new \DateTimeZone($this->outputTimezone));
         }
 
-        $result = array_intersect_key(array(
+        $result = array_intersect_key([
             'year' => $dateTime->format('Y'),
             'month' => $dateTime->format('m'),
             'day' => $dateTime->format('d'),
             'hour' => $dateTime->format('H'),
             'minute' => $dateTime->format('i'),
             'second' => $dateTime->format('s'),
-        ), array_flip($this->fields));
+        ], array_flip($this->fields));
 
         if (!$this->pad) {
             foreach ($result as &$entry) {
@@ -122,7 +122,7 @@ class DateTimeToArrayTransformer extends BaseDateTimeTransformer
             return;
         }
 
-        $emptyFields = array();
+        $emptyFields = [];
 
         foreach ($this->fields as $field) {
             if (!isset($value[$field])) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeZoneToStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeZoneToStringTransformer.php
index 1547499ed5..e319a89076 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeZoneToStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeZoneToStringTransformer.php
@@ -42,7 +42,7 @@ class DateTimeZoneToStringTransformer implements DataTransformerInterface
                 throw new TransformationFailedException('Expected an array.');
             }
 
-            return array_map(array(new self(), 'transform'), $dateTimeZone);
+            return array_map([new self(), 'transform'], $dateTimeZone);
         }
 
         if (!$dateTimeZone instanceof \DateTimeZone) {
@@ -66,7 +66,7 @@ class DateTimeZoneToStringTransformer implements DataTransformerInterface
                 throw new TransformationFailedException('Expected an array.');
             }
 
-            return array_map(array(new self(), 'reverseTransform'), $value);
+            return array_map([new self(), 'reverseTransform'], $value);
         }
 
         if (!\is_string($value)) {
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 95f44c86c7..f6f98e6de3 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -121,7 +121,7 @@ class NumberToLocalizedStringTransformer implements DataTransformerInterface
         }
 
         // Convert non-breaking and narrow non-breaking spaces to normal ones
-        $value = str_replace(array("\xc2\xa0", "\xe2\x80\xaf"), ' ', $value);
+        $value = str_replace(["\xc2\xa0", "\xe2\x80\xaf"], ' ', $value);
 
         return $value;
     }
@@ -146,7 +146,7 @@ class NumberToLocalizedStringTransformer implements DataTransformerInterface
             return;
         }
 
-        if (\in_array($value, array('NaN', 'NAN', 'nan'), true)) {
+        if (\in_array($value, ['NaN', 'NAN', 'nan'], true)) {
             throw new TransformationFailedException('"NaN" is not a valid number');
         }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
index 74439a042c..9ec387479b 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
@@ -26,10 +26,10 @@ class PercentToLocalizedStringTransformer implements DataTransformerInterface
     const FRACTIONAL = 'fractional';
     const INTEGER = 'integer';
 
-    protected static $types = array(
+    protected static $types = [
         self::FRACTIONAL,
         self::INTEGER,
-    );
+    ];
 
     private $type;
     private $scale;
diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
index 49032a6777..72e34f4544 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/ValueToDuplicatesTransformer.php
@@ -35,7 +35,7 @@ class ValueToDuplicatesTransformer implements DataTransformerInterface
      */
     public function transform($value)
     {
-        $result = array();
+        $result = [];
 
         foreach ($this->keys as $key) {
             $result[$key] = $value;
@@ -59,10 +59,10 @@ class ValueToDuplicatesTransformer implements DataTransformerInterface
         }
 
         $result = current($array);
-        $emptyKeys = array();
+        $emptyKeys = [];
 
         foreach ($this->keys as $key) {
-            if (isset($array[$key]) && '' !== $array[$key] && false !== $array[$key] && array() !== $array[$key]) {
+            if (isset($array[$key]) && '' !== $array[$key] && false !== $array[$key] && [] !== $array[$key]) {
                 if ($array[$key] !== $result) {
                     throw new TransformationFailedException('All values in the array should be the same');
                 }
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
index 2219b819da..53dd4ee871 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
@@ -43,6 +43,6 @@ class FixUrlProtocolListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(FormEvents::SUBMIT => 'onSubmit');
+        return [FormEvents::SUBMIT => 'onSubmit'];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
index 279c90c74a..cd4a3b5430 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/MergeCollectionListener.php
@@ -36,9 +36,9 @@ class MergeCollectionListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             FormEvents::SUBMIT => 'onSubmit',
-        );
+        ];
     }
 
     public function onSubmit(FormEvent $event)
@@ -47,7 +47,7 @@ class MergeCollectionListener implements EventSubscriberInterface
         $data = $event->getData();
 
         if (null === $data) {
-            $data = array();
+            $data = [];
         }
 
         if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
@@ -73,7 +73,7 @@ class MergeCollectionListener implements EventSubscriberInterface
         } else {
             // Calculate delta
             $itemsToAdd = \is_object($data) ? clone $data : $data;
-            $itemsToDelete = array();
+            $itemsToDelete = [];
 
             foreach ($dataToMergeInto as $beforeKey => $beforeItem) {
                 foreach ($data as $afterKey => $afterItem) {
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
index 8e6867dbcf..695336e954 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/ResizeFormListener.php
@@ -38,7 +38,7 @@ class ResizeFormListener implements EventSubscriberInterface
      * @param bool          $allowDelete Whether children could be removed from the group
      * @param bool|callable $deleteEmpty
      */
-    public function __construct(string $type, array $options = array(), bool $allowAdd = false, bool $allowDelete = false, $deleteEmpty = false)
+    public function __construct(string $type, array $options = [], bool $allowAdd = false, bool $allowDelete = false, $deleteEmpty = false)
     {
         $this->type = $type;
         $this->allowAdd = $allowAdd;
@@ -49,12 +49,12 @@ class ResizeFormListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             FormEvents::PRE_SET_DATA => 'preSetData',
             FormEvents::PRE_SUBMIT => 'preSubmit',
             // (MergeCollectionListener, MergeDoctrineCollectionListener)
-            FormEvents::SUBMIT => array('onSubmit', 50),
-        );
+            FormEvents::SUBMIT => ['onSubmit', 50],
+        ];
     }
 
     public function preSetData(FormEvent $event)
@@ -63,7 +63,7 @@ class ResizeFormListener implements EventSubscriberInterface
         $data = $event->getData();
 
         if (null === $data) {
-            $data = array();
+            $data = [];
         }
 
         if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
@@ -77,9 +77,9 @@ class ResizeFormListener implements EventSubscriberInterface
 
         // Then add all rows again in the correct order
         foreach ($data as $name => $value) {
-            $form->add($name, $this->type, array_replace(array(
+            $form->add($name, $this->type, array_replace([
                 'property_path' => '['.$name.']',
-            ), $this->options));
+            ], $this->options));
         }
     }
 
@@ -89,7 +89,7 @@ class ResizeFormListener implements EventSubscriberInterface
         $data = $event->getData();
 
         if (!\is_array($data)) {
-            $data = array();
+            $data = [];
         }
 
         // Remove all empty rows
@@ -105,9 +105,9 @@ class ResizeFormListener implements EventSubscriberInterface
         if ($this->allowAdd) {
             foreach ($data as $name => $value) {
                 if (!$form->has($name)) {
-                    $form->add($name, $this->type, array_replace(array(
+                    $form->add($name, $this->type, array_replace([
                         'property_path' => '['.$name.']',
-                    ), $this->options));
+                    ], $this->options));
                 }
             }
         }
@@ -123,7 +123,7 @@ class ResizeFormListener implements EventSubscriberInterface
         // entries, so we need to manually unset removed entries in the collection.
 
         if (null === $data) {
-            $data = array();
+            $data = [];
         }
 
         if (!\is_array($data) && !($data instanceof \Traversable && $data instanceof \ArrayAccess)) {
@@ -149,7 +149,7 @@ class ResizeFormListener implements EventSubscriberInterface
         // The data mapper only adds, but does not remove items, so do this
         // here
         if ($this->allowDelete) {
-            $toDelete = array();
+            $toDelete = [];
 
             foreach ($data as $name => $child) {
                 if (!$form->has($name)) {
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/TransformationFailureListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/TransformationFailureListener.php
index f46eb499e0..835a028315 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/TransformationFailureListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/TransformationFailureListener.php
@@ -31,9 +31,9 @@ class TransformationFailureListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            FormEvents::POST_SUBMIT => array('convertTransformationFailureToFormError', -1024),
-        );
+        return [
+            FormEvents::POST_SUBMIT => ['convertTransformationFailureToFormError', -1024],
+        ];
     }
 
     public function convertTransformationFailureToFormError(FormEvent $event)
@@ -54,11 +54,11 @@ class TransformationFailureListener implements EventSubscriberInterface
         $messageTemplate = 'The value {{ value }} is not valid.';
 
         if (null !== $this->translator) {
-            $message = $this->translator->trans($messageTemplate, array('{{ value }}' => $clientDataAsString));
+            $message = $this->translator->trans($messageTemplate, ['{{ value }}' => $clientDataAsString]);
         } else {
-            $message = strtr($messageTemplate, array('{{ value }}' => $clientDataAsString));
+            $message = strtr($messageTemplate, ['{{ value }}' => $clientDataAsString]);
         }
 
-        $form->addError(new FormError($message, $messageTemplate, array('{{ value }}' => $clientDataAsString), null, $form->getTransformationFailure()));
+        $form->addError(new FormError($message, $messageTemplate, ['{{ value }}' => $clientDataAsString], null, $form->getTransformationFailure()));
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
index 59f1a242f8..be8c38a854 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/TrimListener.php
@@ -36,6 +36,6 @@ class TrimListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(FormEvents::PRE_SUBMIT => 'preSubmit');
+        return [FormEvents::PRE_SUBMIT => 'preSubmit'];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php b/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
index 91c6d8615c..8badd0817b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/BaseType.php
@@ -75,7 +75,7 @@ abstract class BaseType extends AbstractType
             $id = ltrim($id, '_0123456789');
         }
 
-        $blockPrefixes = array();
+        $blockPrefixes = [];
         for ($type = $form->getConfig()->getType(); null !== $type; $type = $type->getParent()) {
             array_unshift($blockPrefixes, $type->getBlockPrefix());
         }
@@ -84,7 +84,7 @@ abstract class BaseType extends AbstractType
         }
         $blockPrefixes[] = $uniqueBlockPrefix;
 
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'form' => $view,
             'id' => $id,
             'name' => $name,
@@ -104,7 +104,7 @@ abstract class BaseType extends AbstractType
             // be rendered differently.
             // https://github.com/symfony/symfony/issues/5038
             'cache_key' => $uniqueBlockPrefix.'_'.$form->getConfig()->getType()->getBlockPrefix(),
-        ));
+        ]);
     }
 
     /**
@@ -112,16 +112,16 @@ abstract class BaseType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'block_name' => null,
             'block_prefix' => null,
             'disabled' => false,
             'label' => null,
             'label_format' => null,
-            'attr' => array(),
+            'attr' => [],
             'translation_domain' => null,
             'auto_initialize' => true,
-        ));
+        ]);
 
         $resolver->setAllowedTypes('block_prefix', array('null', 'string'));
         $resolver->setAllowedTypes('attr', 'array');
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/ButtonType.php b/src/Symfony/Component/Form/Extension/Core/Type/ButtonType.php
index 3a62eb8a47..2b60f4f31e 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/ButtonType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/ButtonType.php
@@ -43,8 +43,8 @@ class ButtonType extends BaseType implements ButtonTypeInterface
     {
         parent::configureOptions($resolver);
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'auto_initialize' => false,
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/CheckboxType.php b/src/Symfony/Component/Form/Extension/Core/Type/CheckboxType.php
index 4f4d58198e..2b29c5ad9b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/CheckboxType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/CheckboxType.php
@@ -40,10 +40,10 @@ class CheckboxType extends AbstractType
      */
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'value' => $options['value'],
             'checked' => null !== $form->getViewData(),
-        ));
+        ]);
     }
 
     /**
@@ -55,12 +55,12 @@ class CheckboxType extends AbstractType
             return $viewData;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'value' => '1',
             'empty_data' => $emptyData,
             'compound' => false,
-            'false_values' => array(null),
-        ));
+            'false_values' => [null],
+        ]);
 
         $resolver->setAllowedTypes('false_values', 'array');
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php b/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
index fcaf42e765..8d2d109699 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/ChoiceType.php
@@ -70,7 +70,7 @@ class ChoiceType extends AbstractType
 
             // Check if the choices already contain the empty value
             // Only add the placeholder option if this is not the case
-            if (null !== $options['placeholder'] && 0 === \count($choiceList->getChoicesForValues(array('')))) {
+            if (null !== $options['placeholder'] && 0 === \count($choiceList->getChoicesForValues(['']))) {
                 $placeholderView = new ChoiceView(null, '', $options['placeholder']);
 
                 // "placeholder" is a reserved name
@@ -108,7 +108,7 @@ class ChoiceType extends AbstractType
                 $unknownValues = $valueMap;
 
                 // Reconstruct the data as mapping from child names to values
-                $data = array();
+                $data = [];
 
                 /** @var FormInterface $child */
                 foreach ($form as $child) {
@@ -184,7 +184,7 @@ class ChoiceType extends AbstractType
             ? $form->getConfig()->getAttribute('choice_list_view')
             : $this->createChoiceListView($choiceList, $options);
 
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'multiple' => $options['multiple'],
             'expanded' => $options['expanded'],
             'preferred_choices' => $choiceListView->preferredChoices,
@@ -192,7 +192,7 @@ class ChoiceType extends AbstractType
             'separator' => '-------------------',
             'placeholder' => null,
             'choice_translation_domain' => $choiceTranslationDomain,
-        ));
+        ]);
 
         // The decision, whether a choice is selected, is potentially done
         // thousand of times during the rendering of a template. Provide a
@@ -255,7 +255,7 @@ class ChoiceType extends AbstractType
             }
 
             if ($options['multiple']) {
-                return array();
+                return [];
             }
 
             return '';
@@ -296,16 +296,16 @@ class ChoiceType extends AbstractType
             return $choiceTranslationDomain;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'multiple' => false,
             'expanded' => false,
-            'choices' => array(),
+            'choices' => [],
             'choice_loader' => null,
             'choice_label' => null,
             'choice_name' => null,
             'choice_value' => null,
             'choice_attr' => null,
-            'preferred_choices' => array(),
+            'preferred_choices' => [],
             'group_by' => null,
             'empty_data' => $emptyData,
             'placeholder' => $placeholderDefault,
@@ -317,20 +317,20 @@ class ChoiceType extends AbstractType
             'data_class' => null,
             'choice_translation_domain' => true,
             'trim' => false,
-        ));
+        ]);
 
         $resolver->setNormalizer('placeholder', $placeholderNormalizer);
         $resolver->setNormalizer('choice_translation_domain', $choiceTranslationDomainNormalizer);
 
-        $resolver->setAllowedTypes('choices', array('null', 'array', '\Traversable'));
-        $resolver->setAllowedTypes('choice_translation_domain', array('null', 'bool', 'string'));
-        $resolver->setAllowedTypes('choice_loader', array('null', 'Symfony\Component\Form\ChoiceList\Loader\ChoiceLoaderInterface'));
-        $resolver->setAllowedTypes('choice_label', array('null', 'bool', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
-        $resolver->setAllowedTypes('choice_name', array('null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
-        $resolver->setAllowedTypes('choice_value', array('null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
-        $resolver->setAllowedTypes('choice_attr', array('null', 'array', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
-        $resolver->setAllowedTypes('preferred_choices', array('array', '\Traversable', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
-        $resolver->setAllowedTypes('group_by', array('null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath'));
+        $resolver->setAllowedTypes('choices', ['null', 'array', '\Traversable']);
+        $resolver->setAllowedTypes('choice_translation_domain', ['null', 'bool', 'string']);
+        $resolver->setAllowedTypes('choice_loader', ['null', 'Symfony\Component\Form\ChoiceList\Loader\ChoiceLoaderInterface']);
+        $resolver->setAllowedTypes('choice_label', ['null', 'bool', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
+        $resolver->setAllowedTypes('choice_name', ['null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
+        $resolver->setAllowedTypes('choice_value', ['null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
+        $resolver->setAllowedTypes('choice_attr', ['null', 'array', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
+        $resolver->setAllowedTypes('preferred_choices', ['array', '\Traversable', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
+        $resolver->setAllowedTypes('group_by', ['null', 'callable', 'string', 'Symfony\Component\PropertyAccess\PropertyPath']);
     }
 
     /**
@@ -367,13 +367,13 @@ class ChoiceType extends AbstractType
      */
     private function addSubForm(FormBuilderInterface $builder, string $name, ChoiceView $choiceView, array $options)
     {
-        $choiceOpts = array(
+        $choiceOpts = [
             'value' => $choiceView->value,
             'label' => $choiceView->label,
             'attr' => $choiceView->attr,
             'translation_domain' => $options['translation_domain'],
             'block_name' => 'entry',
-        );
+        ];
 
         if ($options['multiple']) {
             $choiceType = __NAMESPACE__.'\CheckboxType';
@@ -397,7 +397,7 @@ class ChoiceType extends AbstractType
         }
 
         // Harden against NULL values (like in EntityType and ModelType)
-        $choices = null !== $options['choices'] ? $options['choices'] : array();
+        $choices = null !== $options['choices'] ? $options['choices'] : [];
 
         return $this->choiceListFactory->createListFromChoices($choices, $options['choice_value']);
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php b/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
index 1cdc99019e..fc36cca6da 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/CollectionType.php
@@ -27,10 +27,10 @@ class CollectionType extends AbstractType
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         if ($options['allow_add'] && $options['prototype']) {
-            $prototypeOptions = array_replace(array(
+            $prototypeOptions = array_replace([
                 'required' => $options['required'],
                 'label' => $options['prototype_name'].'label__',
-            ), $options['entry_options']);
+            ], $options['entry_options']);
 
             if (null !== $options['prototype_data']) {
                 $prototypeOptions['data'] = $options['prototype_data'];
@@ -56,10 +56,10 @@ class CollectionType extends AbstractType
      */
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'allow_add' => $options['allow_add'],
             'allow_delete' => $options['allow_delete'],
-        ));
+        ]);
 
         if ($form->getConfig()->hasAttribute('prototype')) {
             $prototype = $form->getConfig()->getAttribute('prototype');
@@ -88,19 +88,19 @@ class CollectionType extends AbstractType
             return $value;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'allow_add' => false,
             'allow_delete' => false,
             'prototype' => true,
             'prototype_data' => null,
             'prototype_name' => '__name__',
             'entry_type' => __NAMESPACE__.'\TextType',
-            'entry_options' => array(),
+            'entry_options' => [],
             'delete_empty' => false,
-        ));
+        ]);
 
         $resolver->setNormalizer('entry_options', $entryOptionsNormalizer);
-        $resolver->setAllowedTypes('delete_empty', array('bool', 'callable'));
+        $resolver->setAllowedTypes('delete_empty', ['bool', 'callable']);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/CountryType.php b/src/Symfony/Component/Form/Extension/Core/Type/CountryType.php
index 195347bc9d..2373dee5ff 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/CountryType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/CountryType.php
@@ -39,7 +39,7 @@ class CountryType extends AbstractType implements ChoiceLoaderInterface
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'choice_loader' => function (Options $options) {
                 $choiceTranslationLocale = $options['choice_translation_locale'];
 
@@ -49,9 +49,9 @@ class CountryType extends AbstractType implements ChoiceLoaderInterface
             },
             'choice_translation_domain' => false,
             'choice_translation_locale' => null,
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('choice_translation_locale', array('null', 'string'));
+        $resolver->setAllowedTypes('choice_translation_locale', ['null', 'string']);
     }
 
     /**
@@ -98,7 +98,7 @@ class CountryType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $values = array_filter($values);
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -116,7 +116,7 @@ class CountryType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $choices = array_filter($choices);
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // If no callable is set, choices are the same as values
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/CurrencyType.php b/src/Symfony/Component/Form/Extension/Core/Type/CurrencyType.php
index 4cf76eed58..134d568e4d 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/CurrencyType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/CurrencyType.php
@@ -39,7 +39,7 @@ class CurrencyType extends AbstractType implements ChoiceLoaderInterface
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'choice_loader' => function (Options $options) {
                 $choiceTranslationLocale = $options['choice_translation_locale'];
 
@@ -49,9 +49,9 @@ class CurrencyType extends AbstractType implements ChoiceLoaderInterface
             },
             'choice_translation_domain' => false,
             'choice_translation_locale' => null,
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('choice_translation_locale', array('null', 'string'));
+        $resolver->setAllowedTypes('choice_translation_locale', ['null', 'string']);
     }
 
     /**
@@ -98,7 +98,7 @@ class CurrencyType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $values = array_filter($values);
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -116,7 +116,7 @@ class CurrencyType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $choices = array_filter($choices);
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // If no callable is set, choices are the same as values
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateIntervalType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateIntervalType.php
index 29e122a788..181ce74993 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateIntervalType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateIntervalType.php
@@ -28,7 +28,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
  */
 class DateIntervalType extends AbstractType
 {
-    private $timeParts = array(
+    private $timeParts = [
         'years',
         'months',
         'weeks',
@@ -36,12 +36,12 @@ class DateIntervalType extends AbstractType
         'hours',
         'minutes',
         'seconds',
-    );
-    private static $widgets = array(
+    ];
+    private static $widgets = [
         'text' => TextType::class,
         'integer' => IntegerType::class,
         'choice' => ChoiceType::class,
-    );
+    ];
 
     /**
      * {@inheritdoc}
@@ -58,7 +58,7 @@ class DateIntervalType extends AbstractType
             throw new InvalidConfigurationException('You can not enable weeks and days fields together.');
         }
         $format = 'P';
-        $parts = array();
+        $parts = [];
         if ($options['with_years']) {
             $format .= '%yY';
             $parts[] = 'years';
@@ -98,7 +98,7 @@ class DateIntervalType extends AbstractType
         } else {
             foreach ($this->timeParts as $part) {
                 if ($options['with_'.$part]) {
-                    $childOptions = array(
+                    $childOptions = [
                         'error_bubbling' => true,
                         'label' => $options['labels'][$part],
                         // Append generic carry-along options
@@ -106,7 +106,7 @@ class DateIntervalType extends AbstractType
                         'translation_domain' => $options['translation_domain'],
                         // when compound the array entries are ignored, we need to cascade the configuration here
                         'empty_data' => isset($options['empty_data'][$part]) ? $options['empty_data'][$part] : null,
-                    );
+                    ];
                     if ('choice' === $options['widget']) {
                         $childOptions['choice_translation_domain'] = false;
                         $childOptions['choices'] = $options[$part];
@@ -124,12 +124,12 @@ class DateIntervalType extends AbstractType
                 }
             }
             if ($options['with_invert']) {
-                $builder->add('invert', CheckboxType::class, array(
+                $builder->add('invert', CheckboxType::class, [
                     'label' => $options['labels']['invert'],
                     'error_bubbling' => true,
                     'required' => false,
                     'translation_domain' => $options['translation_domain'],
-                ));
+                ]);
             }
             $builder->addViewTransformer(new DateIntervalToArrayTransformer($parts, 'text' === $options['widget']));
         }
@@ -153,10 +153,10 @@ class DateIntervalType extends AbstractType
      */
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
-        $vars = array(
+        $vars = [
             'widget' => $options['widget'],
             'with_invert' => $options['with_invert'],
-        );
+        ];
         foreach ($this->timeParts as $part) {
             $vars['with_'.$part] = $options['with_'.$part];
         }
@@ -173,7 +173,7 @@ class DateIntervalType extends AbstractType
             return 'single_text' !== $options['widget'];
         };
         $emptyData = function (Options $options) {
-            return 'single_text' === $options['widget'] ? '' : array();
+            return 'single_text' === $options['widget'] ? '' : [];
         };
 
         $placeholderDefault = function (Options $options) {
@@ -191,7 +191,7 @@ class DateIntervalType extends AbstractType
         };
 
         $labelsNormalizer = function (Options $options, array $labels) {
-            return array_replace(array(
+            return array_replace([
                 'years' => null,
                 'months' => null,
                 'days' => null,
@@ -200,13 +200,13 @@ class DateIntervalType extends AbstractType
                 'minutes' => null,
                 'seconds' => null,
                 'invert' => 'Negative interval',
-            ), array_filter($labels, function ($label) {
+            ], array_filter($labels, function ($label) {
                 return null !== $label;
             }));
         };
 
         $resolver->setDefaults(
-            array(
+            [
                 'with_years' => true,
                 'with_months' => true,
                 'with_days' => true,
@@ -234,28 +234,28 @@ class DateIntervalType extends AbstractType
                 'data_class' => null,
                 'compound' => $compound,
                 'empty_data' => $emptyData,
-                'labels' => array(),
-            )
+                'labels' => [],
+            ]
         );
         $resolver->setNormalizer('placeholder', $placeholderNormalizer);
         $resolver->setNormalizer('labels', $labelsNormalizer);
 
         $resolver->setAllowedValues(
             'input',
-            array(
+            [
                 'dateinterval',
                 'string',
                 'array',
-            )
+            ]
         );
         $resolver->setAllowedValues(
             'widget',
-            array(
+            [
                 'single_text',
                 'text',
                 'integer',
                 'choice',
-            )
+            ]
         );
         // Don't clone \DateInterval classes, as i.e. format()
         // does not work after that
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
index 653307e081..2f9f5c9a54 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateTimeType.php
@@ -39,21 +39,21 @@ class DateTimeType extends AbstractType
      */
     const HTML5_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
 
-    private static $acceptedFormats = array(
+    private static $acceptedFormats = [
         \IntlDateFormatter::FULL,
         \IntlDateFormatter::LONG,
         \IntlDateFormatter::MEDIUM,
         \IntlDateFormatter::SHORT,
-    );
+    ];
 
     /**
      * {@inheritdoc}
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        $parts = array('year', 'month', 'day', 'hour');
-        $dateParts = array('year', 'month', 'day');
-        $timeParts = array('hour');
+        $parts = ['year', 'month', 'day', 'hour'];
+        $dateParts = ['year', 'month', 'day'];
+        $timeParts = ['hour'];
 
         if ($options['with_minutes']) {
             $parts[] = 'minute';
@@ -93,9 +93,9 @@ class DateTimeType extends AbstractType
         } else {
             // when the form is compound the entries of the array are ignored in favor of children data
             // so we need to handle the cascade setting here
-            $emptyData = $builder->getEmptyData() ?: array();
+            $emptyData = $builder->getEmptyData() ?: [];
             // Only pass a subset of the options to children
-            $dateOptions = array_intersect_key($options, array_flip(array(
+            $dateOptions = array_intersect_key($options, array_flip([
                 'years',
                 'months',
                 'days',
@@ -106,13 +106,13 @@ class DateTimeType extends AbstractType
                 'html5',
                 'invalid_message',
                 'invalid_message_parameters',
-            )));
+            ]));
 
             if (isset($emptyData['date'])) {
                 $dateOptions['empty_data'] = $emptyData['date'];
             }
 
-            $timeOptions = array_intersect_key($options, array_flip(array(
+            $timeOptions = array_intersect_key($options, array_flip([
                 'hours',
                 'minutes',
                 'seconds',
@@ -125,7 +125,7 @@ class DateTimeType extends AbstractType
                 'html5',
                 'invalid_message',
                 'invalid_message_parameters',
-            )));
+            ]));
 
             if (isset($emptyData['time'])) {
                 $timeOptions['empty_data'] = $emptyData['time'];
@@ -160,13 +160,13 @@ class DateTimeType extends AbstractType
             $dateOptions['error_bubbling'] = $timeOptions['error_bubbling'] = true;
 
             $builder
-                ->addViewTransformer(new DataTransformerChain(array(
+                ->addViewTransformer(new DataTransformerChain([
                     new DateTimeToArrayTransformer($options['model_timezone'], $options['view_timezone'], $parts),
-                    new ArrayToPartsTransformer(array(
+                    new ArrayToPartsTransformer([
                         'date' => $dateParts,
                         'time' => $timeParts,
-                    )),
-                )))
+                    ]),
+                ]))
                 ->add('date', __NAMESPACE__.'\DateType', $dateOptions)
                 ->add('time', __NAMESPACE__.'\TimeType', $timeOptions)
             ;
@@ -224,7 +224,7 @@ class DateTimeType extends AbstractType
             return $options['widget'];
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'input' => 'datetime',
             'model_timezone' => null,
             'view_timezone' => null,
@@ -249,13 +249,13 @@ class DateTimeType extends AbstractType
             'date_label' => null,
             'time_label' => null,
             'empty_data' => function (Options $options) {
-                return $options['compound'] ? array() : '';
+                return $options['compound'] ? [] : '';
             },
-        ));
+        ]);
 
         // Don't add some defaults in order to preserve the defaults
         // set in DateType and TimeType
-        $resolver->setDefined(array(
+        $resolver->setDefined([
             'placeholder',
             'choice_translation_domain',
             'years',
@@ -264,34 +264,34 @@ class DateTimeType extends AbstractType
             'hours',
             'minutes',
             'seconds',
-        ));
+        ]);
 
-        $resolver->setAllowedValues('input', array(
+        $resolver->setAllowedValues('input', [
             'datetime',
             'datetime_immutable',
             'string',
             'timestamp',
             'array',
-        ));
-        $resolver->setAllowedValues('date_widget', array(
+        ]);
+        $resolver->setAllowedValues('date_widget', [
             null, // inherit default from DateType
             'single_text',
             'text',
             'choice',
-        ));
-        $resolver->setAllowedValues('time_widget', array(
+        ]);
+        $resolver->setAllowedValues('time_widget', [
             null, // inherit default from TimeType
             'single_text',
             'text',
             'choice',
-        ));
+        ]);
         // This option will overwrite "date_widget" and "time_widget" options
-        $resolver->setAllowedValues('widget', array(
+        $resolver->setAllowedValues('widget', [
             null, // default, don't overwrite options
             'single_text',
             'text',
             'choice',
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
index e8519746f7..81a928871d 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
@@ -30,17 +30,17 @@ class DateType extends AbstractType
     const DEFAULT_FORMAT = \IntlDateFormatter::MEDIUM;
     const HTML5_FORMAT = 'yyyy-MM-dd';
 
-    private static $acceptedFormats = array(
+    private static $acceptedFormats = [
         \IntlDateFormatter::FULL,
         \IntlDateFormatter::LONG,
         \IntlDateFormatter::MEDIUM,
         \IntlDateFormatter::SHORT,
-    );
+    ];
 
-    private static $widgets = array(
+    private static $widgets = [
         'text' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
         'choice' => 'Symfony\Component\Form\Extension\Core\Type\ChoiceType',
-    );
+    ];
 
     /**
      * {@inheritdoc}
@@ -74,13 +74,13 @@ class DateType extends AbstractType
                 throw new InvalidOptionsException(sprintf('The "format" option should contain the letters "y", "M" and "d". Its current value is "%s".', $pattern));
             }
 
-            $yearOptions = $monthOptions = $dayOptions = array(
+            $yearOptions = $monthOptions = $dayOptions = [
                 'error_bubbling' => true,
                 'empty_data' => '',
-            );
+            ];
             // when the form is compound the entries of the array are ignored in favor of children data
             // so we need to handle the cascade setting here
-            $emptyData = $builder->getEmptyData() ?: array();
+            $emptyData = $builder->getEmptyData() ?: [];
 
             if (isset($emptyData['year'])) {
                 $yearOptions['empty_data'] = $emptyData['year'];
@@ -135,7 +135,7 @@ class DateType extends AbstractType
             }
 
             // Append generic carry-along options
-            foreach (array('required', 'translation_domain') as $passOpt) {
+            foreach (['required', 'translation_domain'] as $passOpt) {
                 $yearOptions[$passOpt] = $monthOptions[$passOpt] = $dayOptions[$passOpt] = $options[$passOpt];
             }
 
@@ -144,7 +144,7 @@ class DateType extends AbstractType
                 ->add('month', self::$widgets[$options['widget']], $monthOptions)
                 ->add('day', self::$widgets[$options['widget']], $dayOptions)
                 ->addViewTransformer(new DateTimeToArrayTransformer(
-                    $options['model_timezone'], $options['view_timezone'], array('year', 'month', 'day')
+                    $options['model_timezone'], $options['view_timezone'], ['year', 'month', 'day']
                 ))
                 ->setAttribute('formatter', $formatter)
             ;
@@ -162,7 +162,7 @@ class DateType extends AbstractType
             ));
         } elseif ('array' === $options['input']) {
             $builder->addModelTransformer(new ReversedTransformer(
-                new DateTimeToArrayTransformer($options['model_timezone'], $options['model_timezone'], array('year', 'month', 'day'))
+                new DateTimeToArrayTransformer($options['model_timezone'], $options['model_timezone'], ['year', 'month', 'day'])
             ));
         }
     }
@@ -197,7 +197,7 @@ class DateType extends AbstractType
             // set right order with respect to locale (e.g.: de_DE=dd.MM.yy; en_US=M/d/yy)
             // lookup various formats at http://userguide.icu-project.org/formatparse/datetime
             if (preg_match('/^([yMd]+)[^yMd]*([yMd]+)[^yMd]*([yMd]+)$/', $pattern)) {
-                $pattern = preg_replace(array('/y+/', '/M+/', '/d+/'), array('{{ year }}', '{{ month }}', '{{ day }}'), $pattern);
+                $pattern = preg_replace(['/y+/', '/M+/', '/d+/'], ['{{ year }}', '{{ month }}', '{{ day }}'], $pattern);
             } else {
                 // default fallback
                 $pattern = '{{ year }}{{ month }}{{ day }}';
@@ -225,16 +225,16 @@ class DateType extends AbstractType
                 $default = $placeholderDefault($options);
 
                 return array_merge(
-                    array('year' => $default, 'month' => $default, 'day' => $default),
+                    ['year' => $default, 'month' => $default, 'day' => $default],
                     $placeholder
                 );
             }
 
-            return array(
+            return [
                 'year' => $placeholder,
                 'month' => $placeholder,
                 'day' => $placeholder,
-            );
+            ];
         };
 
         $choiceTranslationDomainNormalizer = function (Options $options, $choiceTranslationDomain) {
@@ -242,23 +242,23 @@ class DateType extends AbstractType
                 $default = false;
 
                 return array_replace(
-                    array('year' => $default, 'month' => $default, 'day' => $default),
+                    ['year' => $default, 'month' => $default, 'day' => $default],
                     $choiceTranslationDomain
                 );
             }
 
-            return array(
+            return [
                 'year' => $choiceTranslationDomain,
                 'month' => $choiceTranslationDomain,
                 'day' => $choiceTranslationDomain,
-            );
+            ];
         };
 
         $format = function (Options $options) {
-            return 'single_text' === $options['widget'] ? DateType::HTML5_FORMAT : DateType::DEFAULT_FORMAT;
+            return 'single_text' === $options['widget'] ? self::HTML5_FORMAT : self::DEFAULT_FORMAT;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'years' => range(date('Y') - 5, date('Y') + 5),
             'months' => range(1, 12),
             'days' => range(1, 31),
@@ -280,28 +280,28 @@ class DateType extends AbstractType
             'data_class' => null,
             'compound' => $compound,
             'empty_data' => function (Options $options) {
-                return $options['compound'] ? array() : '';
+                return $options['compound'] ? [] : '';
             },
             'choice_translation_domain' => false,
-        ));
+        ]);
 
         $resolver->setNormalizer('placeholder', $placeholderNormalizer);
         $resolver->setNormalizer('choice_translation_domain', $choiceTranslationDomainNormalizer);
 
-        $resolver->setAllowedValues('input', array(
+        $resolver->setAllowedValues('input', [
             'datetime',
             'datetime_immutable',
             'string',
             'timestamp',
             'array',
-        ));
-        $resolver->setAllowedValues('widget', array(
+        ]);
+        $resolver->setAllowedValues('widget', [
             'single_text',
             'text',
             'choice',
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('format', array('int', 'string'));
+        $resolver->setAllowedTypes('format', ['int', 'string']);
         $resolver->setAllowedTypes('years', 'array');
         $resolver->setAllowedTypes('months', 'array');
         $resolver->setAllowedTypes('days', 'array');
@@ -319,7 +319,7 @@ class DateType extends AbstractType
     {
         $pattern = $formatter->getPattern();
         $timezone = $formatter->getTimeZoneId();
-        $formattedTimestamps = array();
+        $formattedTimestamps = [];
 
         $formatter->setTimeZone('UTC');
 
@@ -342,7 +342,7 @@ class DateType extends AbstractType
 
     private function listYears(array $years)
     {
-        $result = array();
+        $result = [];
 
         foreach ($years as $year) {
             if (false !== $y = gmmktime(0, 0, 0, 6, 15, $year)) {
@@ -355,7 +355,7 @@ class DateType extends AbstractType
 
     private function listMonths(array $months)
     {
-        $result = array();
+        $result = [];
 
         foreach ($months as $month) {
             $result[gmmktime(0, 0, 0, $month, 15)] = $month;
@@ -366,7 +366,7 @@ class DateType extends AbstractType
 
     private function listDays(array $days)
     {
-        $result = array();
+        $result = [];
 
         foreach ($days as $day) {
             $result[gmmktime(0, 0, 0, 5, $day)] = $day;
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
index 56fcfe17e9..59c72889d6 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
@@ -33,11 +33,11 @@ class FileType extends AbstractType
             $requestHandler = $form->getConfig()->getRequestHandler();
 
             if ($options['multiple']) {
-                $data = array();
+                $data = [];
                 $files = $event->getData();
 
                 if (!\is_array($files)) {
-                    $files = array();
+                    $files = [];
                 }
 
                 foreach ($files as $file) {
@@ -48,7 +48,7 @@ class FileType extends AbstractType
 
                 // Since the array is never considered empty in the view data format
                 // on submission, we need to evaluate the configured empty data here
-                if (array() === $data) {
+                if ([] === $data) {
                     $emptyData = $form->getConfig()->getEmptyData();
                     $data = $emptyData instanceof \Closure ? $emptyData($form, $data) : $emptyData;
                 }
@@ -70,10 +70,10 @@ class FileType extends AbstractType
             $view->vars['attr']['multiple'] = 'multiple';
         }
 
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'type' => 'file',
             'value' => '',
-        ));
+        ]);
     }
 
     /**
@@ -97,16 +97,16 @@ class FileType extends AbstractType
         }
 
         $emptyData = function (Options $options) {
-            return $options['multiple'] ? array() : null;
+            return $options['multiple'] ? [] : null;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'compound' => false,
             'data_class' => $dataClass,
             'empty_data' => $emptyData,
             'multiple' => false,
             'allow_file_upload' => true,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
index decc9e380d..31757e2887 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FormType.php
@@ -81,7 +81,7 @@ class FormType extends BaseType
         }
 
         $formConfig = $form->getConfig();
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'errors' => $form->getErrors(),
             'valid' => $form->isSubmitted() ? $form->isValid() : true,
             'value' => $form->getViewData(),
@@ -95,7 +95,7 @@ class FormType extends BaseType
             'method' => $formConfig->getMethod(),
             'action' => $formConfig->getAction(),
             'submitted' => $form->isSubmitted(),
-        ));
+        ]);
     }
 
     /**
@@ -138,7 +138,7 @@ class FormType extends BaseType
             }
 
             return function (FormInterface $form) {
-                return $form->getConfig()->getCompound() ? array() : '';
+                return $form->getConfig()->getCompound() ? [] : '';
             };
         };
 
@@ -157,11 +157,11 @@ class FormType extends BaseType
 
         // If data is given, the form is locked to that data
         // (independent of its value)
-        $resolver->setDefined(array(
+        $resolver->setDefined([
             'data',
-        ));
+        ]);
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'data_class' => $dataClass,
             'empty_data' => $emptyData,
             'trim' => true,
@@ -170,24 +170,24 @@ class FormType extends BaseType
             'mapped' => true,
             'by_reference' => true,
             'error_bubbling' => $errorBubbling,
-            'label_attr' => array(),
+            'label_attr' => [],
             'inherit_data' => false,
             'compound' => true,
             'method' => 'POST',
             // According to RFC 2396 (http://www.ietf.org/rfc/rfc2396.txt)
             // section 4.2., empty URIs are considered same-document references
             'action' => '',
-            'attr' => array(),
+            'attr' => [],
             'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.',
             'upload_max_size_message' => $uploadMaxSizeMessage, // internal
             'allow_file_upload' => false,
             'help' => null,
-            'help_attr' => array(),
-        ));
+            'help_attr' => [],
+        ]);
 
         $resolver->setAllowedTypes('label_attr', 'array');
-        $resolver->setAllowedTypes('upload_max_size_message', array('callable'));
-        $resolver->setAllowedTypes('help', array('string', 'null'));
+        $resolver->setAllowedTypes('upload_max_size_message', ['callable']);
+        $resolver->setAllowedTypes('help', ['string', 'null']);
         $resolver->setAllowedTypes('help_attr', 'array');
     }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/HiddenType.php b/src/Symfony/Component/Form/Extension/Core/Type/HiddenType.php
index 10377501fd..dae7f2bd3d 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/HiddenType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/HiddenType.php
@@ -21,13 +21,13 @@ class HiddenType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             // hidden fields cannot have a required attribute
             'required' => false,
             // Pass errors to the parent
             'error_bubbling' => true,
             'compound' => false,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/IntegerType.php b/src/Symfony/Component/Form/Extension/Core/Type/IntegerType.php
index 22f6d9cb35..af52002ebd 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/IntegerType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/IntegerType.php
@@ -31,14 +31,14 @@ class IntegerType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'grouping' => false,
             // Integer cast rounds towards 0, so do the same when displaying fractions
             'rounding_mode' => IntegerToLocalizedStringTransformer::ROUND_DOWN,
             'compound' => false,
-        ));
+        ]);
 
-        $resolver->setAllowedValues('rounding_mode', array(
+        $resolver->setAllowedValues('rounding_mode', [
             IntegerToLocalizedStringTransformer::ROUND_FLOOR,
             IntegerToLocalizedStringTransformer::ROUND_DOWN,
             IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN,
@@ -46,10 +46,10 @@ class IntegerType extends AbstractType
             IntegerToLocalizedStringTransformer::ROUND_HALF_UP,
             IntegerToLocalizedStringTransformer::ROUND_UP,
             IntegerToLocalizedStringTransformer::ROUND_CEILING,
-        ));
+        ]);
 
         $resolver->setDefined('scale');
-        $resolver->setAllowedTypes('scale', array('null', 'int'));
+        $resolver->setAllowedTypes('scale', ['null', 'int']);
         $resolver->setDeprecated('scale');
     }
 
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/LanguageType.php b/src/Symfony/Component/Form/Extension/Core/Type/LanguageType.php
index 56161563e3..88761598ab 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/LanguageType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/LanguageType.php
@@ -39,7 +39,7 @@ class LanguageType extends AbstractType implements ChoiceLoaderInterface
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'choice_loader' => function (Options $options) {
                 $choiceTranslationLocale = $options['choice_translation_locale'];
 
@@ -49,9 +49,9 @@ class LanguageType extends AbstractType implements ChoiceLoaderInterface
             },
             'choice_translation_domain' => false,
             'choice_translation_locale' => null,
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('choice_translation_locale', array('null', 'string'));
+        $resolver->setAllowedTypes('choice_translation_locale', ['null', 'string']);
     }
 
     /**
@@ -98,7 +98,7 @@ class LanguageType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $values = array_filter($values);
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -116,7 +116,7 @@ class LanguageType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $choices = array_filter($choices);
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // If no callable is set, choices are the same as values
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/LocaleType.php b/src/Symfony/Component/Form/Extension/Core/Type/LocaleType.php
index ed8fe5d840..853f98a928 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/LocaleType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/LocaleType.php
@@ -39,7 +39,7 @@ class LocaleType extends AbstractType implements ChoiceLoaderInterface
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'choice_loader' => function (Options $options) {
                 $choiceTranslationLocale = $options['choice_translation_locale'];
 
@@ -49,9 +49,9 @@ class LocaleType extends AbstractType implements ChoiceLoaderInterface
             },
             'choice_translation_domain' => false,
             'choice_translation_locale' => null,
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('choice_translation_locale', array('null', 'string'));
+        $resolver->setAllowedTypes('choice_translation_locale', ['null', 'string']);
     }
 
     /**
@@ -98,7 +98,7 @@ class LocaleType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $values = array_filter($values);
         if (empty($values)) {
-            return array();
+            return [];
         }
 
         return $this->loadChoiceList($value)->getChoicesForValues($values);
@@ -116,7 +116,7 @@ class LocaleType extends AbstractType implements ChoiceLoaderInterface
         // Optimize
         $choices = array_filter($choices);
         if (empty($choices)) {
-            return array();
+            return [];
         }
 
         // If no callable is set, choices are the same as values
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/MoneyType.php b/src/Symfony/Component/Form/Extension/Core/Type/MoneyType.php
index 0117f80ff4..09a7383c23 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/MoneyType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/MoneyType.php
@@ -21,7 +21,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class MoneyType extends AbstractType
 {
-    protected static $patterns = array();
+    protected static $patterns = [];
 
     /**
      * {@inheritdoc}
@@ -51,16 +51,16 @@ class MoneyType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'scale' => 2,
             'grouping' => false,
             'rounding_mode' => NumberToLocalizedStringTransformer::ROUND_HALF_UP,
             'divisor' => 1,
             'currency' => 'EUR',
             'compound' => false,
-        ));
+        ]);
 
-        $resolver->setAllowedValues('rounding_mode', array(
+        $resolver->setAllowedValues('rounding_mode', [
             NumberToLocalizedStringTransformer::ROUND_FLOOR,
             NumberToLocalizedStringTransformer::ROUND_DOWN,
             NumberToLocalizedStringTransformer::ROUND_HALF_DOWN,
@@ -68,7 +68,7 @@ class MoneyType extends AbstractType
             NumberToLocalizedStringTransformer::ROUND_HALF_UP,
             NumberToLocalizedStringTransformer::ROUND_UP,
             NumberToLocalizedStringTransformer::ROUND_CEILING,
-        ));
+        ]);
 
         $resolver->setAllowedTypes('scale', 'int');
     }
@@ -96,7 +96,7 @@ class MoneyType extends AbstractType
         $locale = \Locale::getDefault();
 
         if (!isset(self::$patterns[$locale])) {
-            self::$patterns[$locale] = array();
+            self::$patterns[$locale] = [];
         }
 
         if (!isset(self::$patterns[$locale][$currency])) {
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/NumberType.php b/src/Symfony/Component/Form/Extension/Core/Type/NumberType.php
index 4ef1cac13d..1054b5899b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/NumberType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/NumberType.php
@@ -35,15 +35,15 @@ class NumberType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             // default scale is locale specific (usually around 3)
             'scale' => null,
             'grouping' => false,
             'rounding_mode' => NumberToLocalizedStringTransformer::ROUND_HALF_UP,
             'compound' => false,
-        ));
+        ]);
 
-        $resolver->setAllowedValues('rounding_mode', array(
+        $resolver->setAllowedValues('rounding_mode', [
             NumberToLocalizedStringTransformer::ROUND_FLOOR,
             NumberToLocalizedStringTransformer::ROUND_DOWN,
             NumberToLocalizedStringTransformer::ROUND_HALF_DOWN,
@@ -51,9 +51,9 @@ class NumberType extends AbstractType
             NumberToLocalizedStringTransformer::ROUND_HALF_UP,
             NumberToLocalizedStringTransformer::ROUND_UP,
             NumberToLocalizedStringTransformer::ROUND_CEILING,
-        ));
+        ]);
 
-        $resolver->setAllowedTypes('scale', array('null', 'int'));
+        $resolver->setAllowedTypes('scale', ['null', 'int']);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/PasswordType.php b/src/Symfony/Component/Form/Extension/Core/Type/PasswordType.php
index e651ee8df5..5a5b2605a4 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/PasswordType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/PasswordType.php
@@ -33,10 +33,10 @@ class PasswordType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'always_empty' => true,
             'trim' => false,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/PercentType.php b/src/Symfony/Component/Form/Extension/Core/Type/PercentType.php
index ff4d7168f9..dedb9e8cdd 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/PercentType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/PercentType.php
@@ -31,16 +31,16 @@ class PercentType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'scale' => 0,
             'type' => 'fractional',
             'compound' => false,
-        ));
+        ]);
 
-        $resolver->setAllowedValues('type', array(
+        $resolver->setAllowedValues('type', [
             'fractional',
             'integer',
-        ));
+        ]);
 
         $resolver->setAllowedTypes('scale', 'int');
     }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/RepeatedType.php b/src/Symfony/Component/Form/Extension/Core/Type/RepeatedType.php
index 1189190f09..5f9ee5329c 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/RepeatedType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/RepeatedType.php
@@ -32,10 +32,10 @@ class RepeatedType extends AbstractType
         }
 
         $builder
-            ->addViewTransformer(new ValueToDuplicatesTransformer(array(
+            ->addViewTransformer(new ValueToDuplicatesTransformer([
                 $options['first_name'],
                 $options['second_name'],
-            )))
+            ]))
             ->add($options['first_name'], $options['type'], array_merge($options['options'], $options['first_options']))
             ->add($options['second_name'], $options['type'], array_merge($options['options'], $options['second_options']))
         ;
@@ -46,15 +46,15 @@ class RepeatedType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'type' => __NAMESPACE__.'\TextType',
-            'options' => array(),
-            'first_options' => array(),
-            'second_options' => array(),
+            'options' => [],
+            'first_options' => [],
+            'second_options' => [],
             'first_name' => 'first',
             'second_name' => 'second',
             'error_bubbling' => false,
-        ));
+        ]);
 
         $resolver->setAllowedTypes('options', 'array');
         $resolver->setAllowedTypes('first_options', 'array');
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TextType.php b/src/Symfony/Component/Form/Extension/Core/Type/TextType.php
index 0944c38b61..9b3c59db85 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TextType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TextType.php
@@ -35,9 +35,9 @@ class TextType extends AbstractType implements DataTransformerInterface
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'compound' => false,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
index ec063985f7..076e514ef5 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TimeType.php
@@ -28,17 +28,17 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class TimeType extends AbstractType
 {
-    private static $widgets = array(
+    private static $widgets = [
         'text' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
         'choice' => 'Symfony\Component\Form\Extension\Core\Type\ChoiceType',
-    );
+    ];
 
     /**
      * {@inheritdoc}
      */
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
-        $parts = array('hour');
+        $parts = ['hour'];
         $format = 'H';
 
         if ($options['with_seconds'] && !$options['with_minutes']) {
@@ -69,13 +69,13 @@ class TimeType extends AbstractType
                 });
             }
         } else {
-            $hourOptions = $minuteOptions = $secondOptions = array(
+            $hourOptions = $minuteOptions = $secondOptions = [
                 'error_bubbling' => true,
                 'empty_data' => '',
-            );
+            ];
             // when the form is compound the entries of the array are ignored in favor of children data
             // so we need to handle the cascade setting here
-            $emptyData = $builder->getEmptyData() ?: array();
+            $emptyData = $builder->getEmptyData() ?: [];
 
             if (isset($emptyData['hour'])) {
                 $hourOptions['empty_data'] = $emptyData['hour'];
@@ -94,7 +94,7 @@ class TimeType extends AbstractType
             }
 
             if ('choice' === $options['widget']) {
-                $hours = $minutes = array();
+                $hours = $minutes = [];
 
                 foreach ($options['hours'] as $hour) {
                     $hours[str_pad($hour, 2, '0', STR_PAD_LEFT)] = $hour;
@@ -116,7 +116,7 @@ class TimeType extends AbstractType
                 }
 
                 if ($options['with_seconds']) {
-                    $seconds = array();
+                    $seconds = [];
 
                     foreach ($options['seconds'] as $second) {
                         $seconds[str_pad($second, 2, '0', STR_PAD_LEFT)] = $second;
@@ -128,7 +128,7 @@ class TimeType extends AbstractType
                 }
 
                 // Append generic carry-along options
-                foreach (array('required', 'translation_domain') as $passOpt) {
+                foreach (['required', 'translation_domain'] as $passOpt) {
                     $hourOptions[$passOpt] = $options[$passOpt];
 
                     if ($options['with_minutes']) {
@@ -182,11 +182,11 @@ class TimeType extends AbstractType
      */
     public function buildView(FormView $view, FormInterface $form, array $options)
     {
-        $view->vars = array_replace($view->vars, array(
+        $view->vars = array_replace($view->vars, [
             'widget' => $options['widget'],
             'with_minutes' => $options['with_minutes'],
             'with_seconds' => $options['with_seconds'],
-        ));
+        ]);
 
         // Change the input to a HTML5 time input if
         //  * the widget is set to "single_text"
@@ -222,16 +222,16 @@ class TimeType extends AbstractType
                 $default = $placeholderDefault($options);
 
                 return array_merge(
-                    array('hour' => $default, 'minute' => $default, 'second' => $default),
+                    ['hour' => $default, 'minute' => $default, 'second' => $default],
                     $placeholder
                 );
             }
 
-            return array(
+            return [
                 'hour' => $placeholder,
                 'minute' => $placeholder,
                 'second' => $placeholder,
-            );
+            ];
         };
 
         $choiceTranslationDomainNormalizer = function (Options $options, $choiceTranslationDomain) {
@@ -239,19 +239,19 @@ class TimeType extends AbstractType
                 $default = false;
 
                 return array_replace(
-                    array('hour' => $default, 'minute' => $default, 'second' => $default),
+                    ['hour' => $default, 'minute' => $default, 'second' => $default],
                     $choiceTranslationDomain
                 );
             }
 
-            return array(
+            return [
                 'hour' => $choiceTranslationDomain,
                 'minute' => $choiceTranslationDomain,
                 'second' => $choiceTranslationDomain,
-            );
+            ];
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'hours' => range(0, 23),
             'minutes' => range(0, 59),
             'seconds' => range(0, 59),
@@ -273,27 +273,27 @@ class TimeType extends AbstractType
             // this option.
             'data_class' => null,
             'empty_data' => function (Options $options) {
-                return $options['compound'] ? array() : '';
+                return $options['compound'] ? [] : '';
             },
             'compound' => $compound,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
         $resolver->setNormalizer('placeholder', $placeholderNormalizer);
         $resolver->setNormalizer('choice_translation_domain', $choiceTranslationDomainNormalizer);
 
-        $resolver->setAllowedValues('input', array(
+        $resolver->setAllowedValues('input', [
             'datetime',
             'datetime_immutable',
             'string',
             'timestamp',
             'array',
-        ));
-        $resolver->setAllowedValues('widget', array(
+        ]);
+        $resolver->setAllowedValues('widget', [
             'single_text',
             'text',
             'choice',
-        ));
+        ]);
 
         $resolver->setAllowedTypes('hours', 'array');
         $resolver->setAllowedTypes('minutes', 'array');
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php b/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
index b1a8a03551..d58019e9bc 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TimezoneType.php
@@ -35,7 +35,7 @@ class TimezoneType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'choice_loader' => function (Options $options) {
                 $regions = $options->offsetGet('regions', false);
 
@@ -46,9 +46,9 @@ class TimezoneType extends AbstractType
             'choice_translation_domain' => false,
             'input' => 'string',
             'regions' => \DateTimeZone::ALL,
-        ));
+        ]);
 
-        $resolver->setAllowedValues('input', array('string', 'datetimezone'));
+        $resolver->setAllowedValues('input', ['string', 'datetimezone']);
 
         $resolver->setAllowedTypes('regions', 'int');
         $resolver->setDeprecated('regions', 'The option "%name%" is deprecated since Symfony 4.2.');
@@ -75,7 +75,7 @@ class TimezoneType extends AbstractType
      */
     private static function getTimezones(int $regions): array
     {
-        $timezones = array();
+        $timezones = [];
 
         foreach (\DateTimeZone::listIdentifiers($regions) as $timezone) {
             $parts = explode('/', $timezone);
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/TransformationFailureExtension.php b/src/Symfony/Component/Form/Extension/Core/Type/TransformationFailureExtension.php
index 2e98acc0da..8712fff99b 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/TransformationFailureExtension.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/TransformationFailureExtension.php
@@ -40,6 +40,6 @@ class TransformationFailureExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(FormType::class);
+        return [FormType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/UrlType.php b/src/Symfony/Component/Form/Extension/Core/Type/UrlType.php
index 689a2a1005..17460688b7 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/UrlType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/UrlType.php
@@ -35,7 +35,7 @@ class UrlType extends AbstractType
     {
         $resolver->setDefault('default_protocol', 'http');
 
-        $resolver->setAllowedTypes('default_protocol', array('null', 'string'));
+        $resolver->setAllowedTypes('default_protocol', ['null', 'string']);
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Csrf/CsrfExtension.php b/src/Symfony/Component/Form/Extension/Csrf/CsrfExtension.php
index d84d09b386..502316e257 100644
--- a/src/Symfony/Component/Form/Extension/Csrf/CsrfExtension.php
+++ b/src/Symfony/Component/Form/Extension/Csrf/CsrfExtension.php
@@ -47,8 +47,8 @@ class CsrfExtension extends AbstractExtension
      */
     protected function loadTypeExtensions()
     {
-        return array(
+        return [
             new Type\FormTypeCsrfExtension($this->tokenManager, true, '_token', $this->translator, $this->translationDomain),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php b/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
index 4a49a85fcd..fe25f1f497 100644
--- a/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
+++ b/src/Symfony/Component/Form/Extension/Csrf/EventListener/CsrfValidationListener.php
@@ -36,9 +36,9 @@ class CsrfValidationListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             FormEvents::PRE_SUBMIT => 'preSubmit',
-        );
+        ];
     }
 
     /**
@@ -71,10 +71,10 @@ class CsrfValidationListener implements EventSubscriberInterface
                 $errorMessage = $this->errorMessage;
 
                 if (null !== $this->translator) {
-                    $errorMessage = $this->translator->trans($errorMessage, array(), $this->translationDomain);
+                    $errorMessage = $this->translator->trans($errorMessage, [], $this->translationDomain);
                 }
 
-                $form->addError(new FormError($errorMessage, $errorMessage, array(), null, $csrfToken));
+                $form->addError(new FormError($errorMessage, $errorMessage, [], null, $csrfToken));
             }
 
             if (\is_array($data)) {
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/DataCollectorExtension.php b/src/Symfony/Component/Form/Extension/DataCollector/DataCollectorExtension.php
index 5b60cfbbcd..4b23513b7c 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/DataCollectorExtension.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/DataCollectorExtension.php
@@ -33,8 +33,8 @@ class DataCollectorExtension extends AbstractExtension
      */
     protected function loadTypeExtensions()
     {
-        return array(
+        return [
             new Type\DataCollectorTypeExtension($this->dataCollector),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/EventListener/DataCollectorListener.php b/src/Symfony/Component/Form/Extension/DataCollector/EventListener/DataCollectorListener.php
index 1ae6e9f3ec..77595ab38a 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/EventListener/DataCollectorListener.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/EventListener/DataCollectorListener.php
@@ -36,12 +36,12 @@ class DataCollectorListener implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             // High priority in order to be called as soon as possible
-            FormEvents::POST_SET_DATA => array('postSetData', 255),
+            FormEvents::POST_SET_DATA => ['postSetData', 255],
             // Low priority in order to be called as late as possible
-            FormEvents::POST_SUBMIT => array('postSubmit', -255),
-        );
+            FormEvents::POST_SUBMIT => ['postSubmit', -255],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php b/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
index 7ac4f8b693..96baf9b58d 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/FormDataCollector.php
@@ -85,11 +85,11 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
 
     public function reset()
     {
-        $this->data = array(
-            'forms' => array(),
-            'forms_by_hash' => array(),
+        $this->data = [
+            'forms' => [],
+            'forms_by_hash' => [],
             'nb_errors' => 0,
-        );
+        ];
     }
 
     /**
@@ -108,7 +108,7 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
         $hash = spl_object_hash($form);
 
         if (!isset($this->dataByForm[$hash])) {
-            $this->dataByForm[$hash] = array();
+            $this->dataByForm[$hash] = [];
         }
 
         $this->dataByForm[$hash] = array_replace(
@@ -129,7 +129,7 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
         $hash = spl_object_hash($form);
 
         if (!isset($this->dataByForm[$hash])) {
-            $this->dataByForm[$hash] = array();
+            $this->dataByForm[$hash] = [];
         }
 
         $this->dataByForm[$hash] = array_replace(
@@ -184,7 +184,7 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
         $hash = spl_object_hash($view);
 
         if (!isset($this->dataByView[$hash])) {
-            $this->dataByView[$hash] = array();
+            $this->dataByView[$hash] = [];
         }
 
         $this->dataByView[$hash] = array_replace(
@@ -245,9 +245,9 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
      */
     protected function getCasters()
     {
-        return parent::getCasters() + array(
+        return parent::getCasters() + [
             \Exception::class => function (\Exception $e, array $a, Stub $s) {
-                foreach (array("\0Exception\0previous", "\0Exception\0trace") as $k) {
+                foreach (["\0Exception\0previous", "\0Exception\0trace"] as $k) {
                     if (isset($a[$k])) {
                         unset($a[$k]);
                         ++$s->cut;
@@ -257,20 +257,20 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
                 return $a;
             },
             FormInterface::class => function (FormInterface $f, array $a) {
-                return array(
+                return [
                     Caster::PREFIX_VIRTUAL.'name' => $f->getName(),
                     Caster::PREFIX_VIRTUAL.'type_class' => new ClassStub(\get_class($f->getConfig()->getType()->getInnerType())),
-                );
+                ];
             },
-            FormView::class => array(StubCaster::class, 'cutInternals'),
+            FormView::class => [StubCaster::class, 'cutInternals'],
             ConstraintViolationInterface::class => function (ConstraintViolationInterface $v, array $a) {
-                return array(
+                return [
                     Caster::PREFIX_VIRTUAL.'root' => $v->getRoot(),
                     Caster::PREFIX_VIRTUAL.'path' => $v->getPropertyPath(),
                     Caster::PREFIX_VIRTUAL.'value' => $v->getInvalidValue(),
-                );
+                ];
             },
-        );
+        ];
     }
 
     private function &recursiveBuildPreliminaryFormTree(FormInterface $form, array &$outputByHash)
@@ -280,9 +280,9 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
         $output = &$outputByHash[$hash];
         $output = isset($this->dataByForm[$hash])
             ? $this->dataByForm[$hash]
-            : array();
+            : [];
 
-        $output['children'] = array();
+        $output['children'] = [];
 
         foreach ($form as $name => $child) {
             $output['children'][$name] = &$this->recursiveBuildPreliminaryFormTree($child, $outputByHash);
@@ -310,18 +310,18 @@ class FormDataCollector extends DataCollector implements FormDataCollectorInterf
 
         $output = isset($this->dataByView[$viewHash])
             ? $this->dataByView[$viewHash]
-            : array();
+            : [];
 
         if (null !== $formHash) {
             $output = array_replace(
                 $output,
                 isset($this->dataByForm[$formHash])
                     ? $this->dataByForm[$formHash]
-                    : array()
+                    : []
             );
         }
 
-        $output['children'] = array();
+        $output['children'] = [];
 
         foreach ($view->children as $name => $childView) {
             // The CSRF token, for example, is never added to the form tree.
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php b/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
index cdb1baec8f..fe82aa149e 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/FormDataExtractor.php
@@ -27,16 +27,16 @@ class FormDataExtractor implements FormDataExtractorInterface
      */
     public function extractConfiguration(FormInterface $form)
     {
-        $data = array(
+        $data = [
             'id' => $this->buildId($form),
             'name' => $form->getName(),
             'type_class' => \get_class($form->getConfig()->getType()->getInnerType()),
             'synchronized' => $form->isSynchronized(),
-            'passed_options' => array(),
-            'resolved_options' => array(),
-        );
+            'passed_options' => [],
+            'resolved_options' => [],
+        ];
 
-        foreach ($form->getConfig()->getAttribute('data_collector/passed_options', array()) as $option => $value) {
+        foreach ($form->getConfig()->getAttribute('data_collector/passed_options', []) as $option => $value) {
             $data['passed_options'][$option] = $value;
         }
 
@@ -55,12 +55,12 @@ class FormDataExtractor implements FormDataExtractorInterface
      */
     public function extractDefaultData(FormInterface $form)
     {
-        $data = array(
-            'default_data' => array(
+        $data = [
+            'default_data' => [
                 'norm' => $form->getNormData(),
-            ),
-            'submitted_data' => array(),
-        );
+            ],
+            'submitted_data' => [],
+        ];
 
         if ($form->getData() !== $form->getNormData()) {
             $data['default_data']['model'] = $form->getData();
@@ -78,12 +78,12 @@ class FormDataExtractor implements FormDataExtractorInterface
      */
     public function extractSubmittedData(FormInterface $form)
     {
-        $data = array(
-            'submitted_data' => array(
+        $data = [
+            'submitted_data' => [
                 'norm' => $form->getNormData(),
-            ),
-            'errors' => array(),
-        );
+            ],
+            'errors' => [],
+        ];
 
         if ($form->getViewData() !== $form->getNormData()) {
             $data['submitted_data']['view'] = $form->getViewData();
@@ -94,13 +94,13 @@ class FormDataExtractor implements FormDataExtractorInterface
         }
 
         foreach ($form->getErrors() as $error) {
-            $errorData = array(
+            $errorData = [
                 'message' => $error->getMessage(),
                 'origin' => \is_object($error->getOrigin())
                     ? spl_object_hash($error->getOrigin())
                     : null,
-                'trace' => array(),
-            );
+                'trace' => [],
+            ];
 
             $cause = $error->getCause();
 
@@ -137,11 +137,11 @@ class FormDataExtractor implements FormDataExtractorInterface
      */
     public function extractViewVariables(FormView $view)
     {
-        $data = array(
+        $data = [
             'id' => isset($view->vars['id']) ? $view->vars['id'] : null,
             'name' => isset($view->vars['name']) ? $view->vars['name'] : null,
-            'view_vars' => array(),
-        );
+            'view_vars' => [],
+        ];
 
         foreach ($view->vars as $varName => $value) {
             $data['view_vars'][$varName] = $value;
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php b/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php
index c403be374b..53a76c8490 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php
@@ -69,7 +69,7 @@ class ResolvedTypeDataCollectorProxy implements ResolvedFormTypeInterface
     /**
      * {@inheritdoc}
      */
-    public function createBuilder(FormFactoryInterface $factory, $name, array $options = array())
+    public function createBuilder(FormFactoryInterface $factory, $name, array $options = [])
     {
         $builder = $this->proxiedType->createBuilder($factory, $name, $options);
 
diff --git a/src/Symfony/Component/Form/Extension/DataCollector/Type/DataCollectorTypeExtension.php b/src/Symfony/Component/Form/Extension/DataCollector/Type/DataCollectorTypeExtension.php
index 5dffe481cc..d25fd132c0 100644
--- a/src/Symfony/Component/Form/Extension/DataCollector/Type/DataCollectorTypeExtension.php
+++ b/src/Symfony/Component/Form/Extension/DataCollector/Type/DataCollectorTypeExtension.php
@@ -48,6 +48,6 @@ class DataCollectorTypeExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(FormType::class);
+        return [FormType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php b/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
index 7afccddf0f..a0a82495bd 100644
--- a/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
+++ b/src/Symfony/Component/Form/Extension/DependencyInjection/DependencyInjectionExtension.php
@@ -52,20 +52,20 @@ class DependencyInjectionExtension implements FormExtensionInterface
 
     public function getTypeExtensions($name)
     {
-        $extensions = array();
+        $extensions = [];
 
         if (isset($this->typeExtensionServices[$name])) {
             foreach ($this->typeExtensionServices[$name] as $serviceId => $extension) {
                 $extensions[] = $extension;
 
                 if (method_exists($extension, 'getExtendedTypes')) {
-                    $extendedTypes = array();
+                    $extendedTypes = [];
 
                     foreach ($extension::getExtendedTypes() as $extendedType) {
                         $extendedTypes[] = $extendedType;
                     }
                 } else {
-                    $extendedTypes = array($extension->getExtendedType());
+                    $extendedTypes = [$extension->getExtendedType()];
                 }
 
                 // validate the result of getExtendedTypes()/getExtendedType() to ensure it is consistent with the service definition
@@ -87,7 +87,7 @@ class DependencyInjectionExtension implements FormExtensionInterface
     {
         if (!$this->guesserLoaded) {
             $this->guesserLoaded = true;
-            $guessers = array();
+            $guessers = [];
 
             foreach ($this->guesserServices as $serviceId => $service) {
                 $guessers[] = $service;
diff --git a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationExtension.php b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationExtension.php
index 08bd89c9e4..27305ada41 100644
--- a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationExtension.php
+++ b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationExtension.php
@@ -22,8 +22,8 @@ class HttpFoundationExtension extends AbstractExtension
 {
     protected function loadTypeExtensions()
     {
-        return array(
+        return [
             new Type\FormTypeHttpFoundationExtension(),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
index bf90ac299a..d560c50d5d 100644
--- a/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
+++ b/src/Symfony/Component/Form/Extension/HttpFoundation/HttpFoundationRequestHandler.php
@@ -75,7 +75,7 @@ class HttpFoundationRequestHandler implements RequestHandlerInterface
                 $form->addError(new FormError(
                     $form->getConfig()->getOption('upload_max_size_message')(),
                     null,
-                    array('{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize())
+                    ['{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize()]
                 ));
 
                 return;
@@ -85,7 +85,7 @@ class HttpFoundationRequestHandler implements RequestHandlerInterface
                 $params = $request->request->all();
                 $files = $request->files->all();
             } elseif ($request->request->has($name) || $request->files->has($name)) {
-                $default = $form->getConfig()->getCompound() ? array() : null;
+                $default = $form->getConfig()->getCompound() ? [] : null;
                 $params = $request->request->get($name, $default);
                 $files = $request->files->get($name, $default);
             } else {
diff --git a/src/Symfony/Component/Form/Extension/HttpFoundation/Type/FormTypeHttpFoundationExtension.php b/src/Symfony/Component/Form/Extension/HttpFoundation/Type/FormTypeHttpFoundationExtension.php
index c3551d55e0..33b053b3a3 100644
--- a/src/Symfony/Component/Form/Extension/HttpFoundation/Type/FormTypeHttpFoundationExtension.php
+++ b/src/Symfony/Component/Form/Extension/HttpFoundation/Type/FormTypeHttpFoundationExtension.php
@@ -42,6 +42,6 @@ class FormTypeHttpFoundationExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(FormType::class);
+        return [FormType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Templating/TemplatingExtension.php b/src/Symfony/Component/Form/Extension/Templating/TemplatingExtension.php
index 903f7c75b4..84dcb1eda9 100644
--- a/src/Symfony/Component/Form/Extension/Templating/TemplatingExtension.php
+++ b/src/Symfony/Component/Form/Extension/Templating/TemplatingExtension.php
@@ -24,10 +24,10 @@ use Symfony\Component\Templating\PhpEngine;
  */
 class TemplatingExtension extends AbstractExtension
 {
-    public function __construct(PhpEngine $engine, CsrfTokenManagerInterface $csrfTokenManager = null, array $defaultThemes = array())
+    public function __construct(PhpEngine $engine, CsrfTokenManagerInterface $csrfTokenManager = null, array $defaultThemes = [])
     {
-        $engine->addHelpers(array(
+        $engine->addHelpers([
             new FormHelper(new FormRenderer(new TemplatingRendererEngine($engine, $defaultThemes), $csrfTokenManager)),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php b/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
index b26c9ef1dd..4805a66bba 100644
--- a/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
+++ b/src/Symfony/Component/Form/Extension/Templating/TemplatingRendererEngine.php
@@ -22,7 +22,7 @@ class TemplatingRendererEngine extends AbstractRendererEngine
 {
     private $engine;
 
-    public function __construct(EngineInterface $engine, array $defaultThemes = array())
+    public function __construct(EngineInterface $engine, array $defaultThemes = [])
     {
         parent::__construct($defaultThemes);
 
@@ -32,7 +32,7 @@ class TemplatingRendererEngine extends AbstractRendererEngine
     /**
      * {@inheritdoc}
      */
-    public function renderBlock(FormView $view, $resource, $blockName, array $variables = array())
+    public function renderBlock(FormView $view, $resource, $blockName, array $variables = [])
     {
         return trim($this->engine->render($resource, $variables));
     }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Constraints/Form.php b/src/Symfony/Component/Form/Extension/Validator/Constraints/Form.php
index 9abb14189d..7d2d751525 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Constraints/Form.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Constraints/Form.php
@@ -21,10 +21,10 @@ class Form extends Constraint
     const NOT_SYNCHRONIZED_ERROR = '1dafa156-89e1-4736-b832-419c2e501fca';
     const NO_SUCH_FIELD_ERROR = '6e5212ed-a197-4339-99aa-5654798a4854';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_SYNCHRONIZED_ERROR => 'NOT_SYNCHRONIZED_ERROR',
         self::NO_SUCH_FIELD_ERROR => 'NO_SUCH_FIELD_ERROR',
-    );
+    ];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php b/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
index 000d681580..6e6ef0c876 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Constraints/FormValidator.php
@@ -55,7 +55,7 @@ class FormValidator extends ConstraintValidator
 
             // Validate the data against the constraints defined
             // in the form
-            $constraints = $config->getOption('constraints', array());
+            $constraints = $config->getOption('constraints', []);
 
             if ($groups instanceof GroupSequence) {
                 $validator->atPath('data')->validate($form->getData(), $constraints, $groups);
@@ -115,7 +115,7 @@ class FormValidator extends ConstraintValidator
 
                 $this->context->setConstraint($constraint);
                 $this->context->buildViolation($config->getOption('invalid_message'))
-                    ->setParameters(array_replace(array('{{ value }}' => $clientDataAsString), $config->getOption('invalid_message_parameters')))
+                    ->setParameters(array_replace(['{{ value }}' => $clientDataAsString], $config->getOption('invalid_message_parameters')))
                     ->setInvalidValue($form->getViewData())
                     ->setCode(Form::NOT_SYNCHRONIZED_ERROR)
                     ->setCause($form->getTransformationFailure())
@@ -166,7 +166,7 @@ class FormValidator extends ConstraintValidator
             $form = $form->getParent();
         } while (null !== $form);
 
-        return array(Constraint::DEFAULT_GROUP);
+        return [Constraint::DEFAULT_GROUP];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Extension/Validator/EventListener/ValidationListener.php b/src/Symfony/Component/Form/Extension/Validator/EventListener/ValidationListener.php
index cbcc3e3e55..80c94dc66e 100644
--- a/src/Symfony/Component/Form/Extension/Validator/EventListener/ValidationListener.php
+++ b/src/Symfony/Component/Form/Extension/Validator/EventListener/ValidationListener.php
@@ -32,7 +32,7 @@ class ValidationListener implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(FormEvents::POST_SUBMIT => 'validateForm');
+        return [FormEvents::POST_SUBMIT => 'validateForm'];
     }
 
     public function __construct(ValidatorInterface $validator, ViolationMapperInterface $violationMapper)
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
index 431bf5ecfb..63505ba233 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/BaseValidatorExtension.php
@@ -32,7 +32,7 @@ abstract class BaseValidatorExtension extends AbstractTypeExtension
         // Make sure that validation groups end up as null, closure or array
         $validationGroupsNormalizer = function (Options $options, $groups) {
             if (false === $groups) {
-                return array();
+                return [];
             }
 
             if (empty($groups)) {
@@ -50,9 +50,9 @@ abstract class BaseValidatorExtension extends AbstractTypeExtension
             return (array) $groups;
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'validation_groups' => null,
-        ));
+        ]);
 
         $resolver->setNormalizer('validation_groups', $validationGroupsNormalizer);
     }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
index 418950aa7d..9de782ffc9 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/FormTypeValidatorExtension.php
@@ -50,17 +50,17 @@ class FormTypeValidatorExtension extends BaseValidatorExtension
 
         // Constraint should always be converted to an array
         $constraintsNormalizer = function (Options $options, $constraints) {
-            return \is_object($constraints) ? array($constraints) : (array) $constraints;
+            return \is_object($constraints) ? [$constraints] : (array) $constraints;
         };
 
-        $resolver->setDefaults(array(
-            'error_mapping' => array(),
-            'constraints' => array(),
+        $resolver->setDefaults([
+            'error_mapping' => [],
+            'constraints' => [],
             'invalid_message' => 'This value is not valid.',
-            'invalid_message_parameters' => array(),
+            'invalid_message_parameters' => [],
             'allow_extra_fields' => false,
             'extra_fields_message' => 'This form should not contain extra fields.',
-        ));
+        ]);
 
         $resolver->setNormalizer('constraints', $constraintsNormalizer);
     }
@@ -70,6 +70,6 @@ class FormTypeValidatorExtension extends BaseValidatorExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(FormType::class);
+        return [FormType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/RepeatedTypeValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/RepeatedTypeValidatorExtension.php
index 3ca6c5308a..4bda0b27d1 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/RepeatedTypeValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/RepeatedTypeValidatorExtension.php
@@ -28,12 +28,12 @@ class RepeatedTypeValidatorExtension extends AbstractTypeExtension
     {
         // Map errors to the first field
         $errorMapping = function (Options $options) {
-            return array('.' => $options['first_name']);
+            return ['.' => $options['first_name']];
         };
 
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'error_mapping' => $errorMapping,
-        ));
+        ]);
     }
 
     /**
@@ -41,6 +41,6 @@ class RepeatedTypeValidatorExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(RepeatedType::class);
+        return [RepeatedType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/SubmitTypeValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/SubmitTypeValidatorExtension.php
index ef14faa99b..ea273d0ad9 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/SubmitTypeValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/SubmitTypeValidatorExtension.php
@@ -23,6 +23,6 @@ class SubmitTypeValidatorExtension extends BaseValidatorExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(SubmitType::class);
+        return [SubmitType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
index f318f88e79..c5b71f903c 100644
--- a/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/Type/UploadValidatorExtension.php
@@ -48,7 +48,7 @@ class UploadValidatorExtension extends AbstractTypeExtension
         $translationDomain = $this->translationDomain;
         $resolver->setNormalizer('upload_max_size_message', function (Options $options, $message) use ($translator, $translationDomain) {
             return function () use ($translator, $translationDomain, $message) {
-                return $translator->trans($message(), array(), $translationDomain);
+                return $translator->trans($message(), [], $translationDomain);
             };
         });
     }
@@ -58,6 +58,6 @@ class UploadValidatorExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(FormType::class);
+        return [FormType::class];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php b/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php
index 8e90a54da4..a5e38859c0 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ValidatorExtension.php
@@ -49,10 +49,10 @@ class ValidatorExtension extends AbstractExtension
 
     protected function loadTypeExtensions()
     {
-        return array(
+        return [
             new Type\FormTypeValidatorExtension($this->validator),
             new Type\RepeatedTypeValidatorExtension(),
             new Type\SubmitTypeValidatorExtension(),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php b/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
index d784c13e69..22cc7726d4 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ValidatorTypeGuesser.php
@@ -81,77 +81,77 @@ class ValidatorTypeGuesser implements FormTypeGuesserInterface
             case 'Symfony\Component\Validator\Constraints\Type':
                 switch ($constraint->type) {
                     case 'array':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', array(), Guess::MEDIUM_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', [], Guess::MEDIUM_CONFIDENCE);
                     case 'boolean':
                     case 'bool':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', array(), Guess::MEDIUM_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', [], Guess::MEDIUM_CONFIDENCE);
 
                     case 'double':
                     case 'float':
                     case 'numeric':
                     case 'real':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', array(), Guess::MEDIUM_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', [], Guess::MEDIUM_CONFIDENCE);
 
                     case 'integer':
                     case 'int':
                     case 'long':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\IntegerType', array(), Guess::MEDIUM_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\IntegerType', [], Guess::MEDIUM_CONFIDENCE);
 
                     case '\DateTime':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', array(), Guess::MEDIUM_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', [], Guess::MEDIUM_CONFIDENCE);
 
                     case 'string':
-                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::LOW_CONFIDENCE);
+                        return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::LOW_CONFIDENCE);
                 }
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Country':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CountryType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CountryType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Currency':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CurrencyType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CurrencyType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Date':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateType', ['input' => 'string'], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\DateTime':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\DateTimeType', ['input' => 'string'], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Email':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\EmailType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\EmailType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\File':
             case 'Symfony\Component\Validator\Constraints\Image':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\FileType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\FileType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Language':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\LanguageType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\LanguageType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Locale':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\LocaleType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\LocaleType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Time':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', array('input' => 'string'), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TimeType', ['input' => 'string'], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Url':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\UrlType', array(), Guess::HIGH_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\UrlType', [], Guess::HIGH_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Ip':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::MEDIUM_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Length':
             case 'Symfony\Component\Validator\Constraints\Regex':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', array(), Guess::LOW_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\TextType', [], Guess::LOW_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Range':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', array(), Guess::LOW_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\NumberType', [], Guess::LOW_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\Count':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', array(), Guess::LOW_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CollectionType', [], Guess::LOW_CONFIDENCE);
 
             case 'Symfony\Component\Validator\Constraints\IsTrue':
             case 'Symfony\Component\Validator\Constraints\IsFalse':
-                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', array(), Guess::MEDIUM_CONFIDENCE);
+                return new TypeGuess('Symfony\Component\Form\Extension\Core\Type\CheckboxType', [], Guess::MEDIUM_CONFIDENCE);
         }
     }
 
@@ -185,7 +185,7 @@ class ValidatorTypeGuesser implements FormTypeGuesserInterface
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Type':
-                if (\in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
+                if (\in_array($constraint->type, ['double', 'float', 'numeric', 'real'])) {
                     return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
                 }
                 break;
@@ -227,7 +227,7 @@ class ValidatorTypeGuesser implements FormTypeGuesserInterface
                 break;
 
             case 'Symfony\Component\Validator\Constraints\Type':
-                if (\in_array($constraint->type, array('double', 'float', 'numeric', 'real'))) {
+                if (\in_array($constraint->type, ['double', 'float', 'numeric', 'real'])) {
                     return new ValueGuess(null, Guess::MEDIUM_CONFIDENCE);
                 }
                 break;
@@ -249,7 +249,7 @@ class ValidatorTypeGuesser implements FormTypeGuesserInterface
      */
     protected function guess($class, $property, \Closure $closure, $defaultValue = null)
     {
-        $guesses = array();
+        $guesses = [];
         $classMetadata = $this->metadataFactory->getMetadataFor($class);
 
         if ($classMetadata instanceof ClassMetadataInterface && $classMetadata->hasPropertyMetadata($property)) {
diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
index 9671082a65..86a77044d1 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationMapper.php
@@ -153,7 +153,7 @@ class ViolationMapper implements ViolationMapperInterface
         $foundAtIndex = null;
 
         // Construct mapping rules for the given form
-        $rules = array();
+        $rules = [];
 
         foreach ($form->getConfig()->getOption('error_mapping') as $propertyPath => $targetPath) {
             // Dot rules are considered at the very end
diff --git a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
index d5e22b926d..37570b7753 100644
--- a/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
+++ b/src/Symfony/Component/Form/Extension/Validator/ViolationMapper/ViolationPath.php
@@ -23,17 +23,17 @@ class ViolationPath implements \IteratorAggregate, PropertyPathInterface
     /**
      * @var array
      */
-    private $elements = array();
+    private $elements = [];
 
     /**
      * @var array
      */
-    private $isIndex = array();
+    private $isIndex = [];
 
     /**
      * @var array
      */
-    private $mapsForm = array();
+    private $mapsForm = [];
 
     /**
      * @var string
diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index 4afda4a207..11056ae425 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -88,7 +88,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
      *
      * @var FormError[] An array of FormError instances
      */
-    private $errors = array();
+    private $errors = [];
 
     /**
      * Whether this form was submitted.
@@ -130,7 +130,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
      *
      * @var array
      */
-    private $extraData = array();
+    private $extraData = [];
 
     /**
      * Returns the transformation failure generated during submission, if any.
@@ -507,7 +507,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
 
         // Initialize errors in the very beginning so that we don't lose any
         // errors added during listeners
-        $this->errors = array();
+        $this->errors = [];
 
         // Obviously, a disabled form should not change its data upon submission.
         if ($this->isDisabled()) {
@@ -564,7 +564,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
             // (think of empty collection forms)
             if ($this->config->getCompound()) {
                 if (null === $submittedData) {
-                    $submittedData = array();
+                    $submittedData = [];
                 }
 
                 if (!\is_array($submittedData)) {
@@ -808,7 +808,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
      */
     public function clearErrors(bool $deep = false): self
     {
-        $this->errors = array();
+        $this->errors = [];
 
         if ($deep) {
             // Clear errors from children
@@ -833,7 +833,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
     /**
      * {@inheritdoc}
      */
-    public function add($child, $type = null, array $options = array())
+    public function add($child, $type = null, array $options = [])
     {
         if ($this->submitted) {
             throw new AlreadySubmittedException('You cannot add children to a submitted form');
@@ -896,7 +896,7 @@ class Form implements \IteratorAggregate, FormInterface, ClearableErrorsInterfac
         $child->setParent($this);
 
         if (!$this->lockSetData && $this->defaultDataSet && !$this->config->getInheritData()) {
-            $iterator = new InheritDataAwareIterator(new \ArrayIterator(array($child->getName() => $child)));
+            $iterator = new InheritDataAwareIterator(new \ArrayIterator([$child->getName() => $child]));
             $iterator = new \RecursiveIteratorIterator($iterator);
             $this->config->getDataMapper()->mapDataToForms($viewData, $iterator);
         }
diff --git a/src/Symfony/Component/Form/FormBuilder.php b/src/Symfony/Component/Form/FormBuilder.php
index 30e1ac0ebe..a795a1e5fa 100644
--- a/src/Symfony/Component/Form/FormBuilder.php
+++ b/src/Symfony/Component/Form/FormBuilder.php
@@ -28,16 +28,16 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
      *
      * @var FormBuilderInterface[]
      */
-    private $children = array();
+    private $children = [];
 
     /**
      * The data of children who haven't been converted to form builders yet.
      *
      * @var array
      */
-    private $unresolvedChildren = array();
+    private $unresolvedChildren = [];
 
-    public function __construct(?string $name, ?string $dataClass, EventDispatcherInterface $dispatcher, FormFactoryInterface $factory, array $options = array())
+    public function __construct(?string $name, ?string $dataClass, EventDispatcherInterface $dispatcher, FormFactoryInterface $factory, array $options = [])
     {
         parent::__construct($name, $dataClass, $dispatcher, $options);
 
@@ -47,7 +47,7 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
     /**
      * {@inheritdoc}
      */
-    public function add($child, $type = null, array $options = array())
+    public function add($child, $type = null, array $options = [])
     {
         if ($this->locked) {
             throw new BadMethodCallException('FormBuilder methods cannot be accessed anymore once the builder is turned into a FormConfigInterface instance.');
@@ -72,10 +72,10 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
 
         // Add to "children" to maintain order
         $this->children[$child] = null;
-        $this->unresolvedChildren[$child] = array(
+        $this->unresolvedChildren[$child] = [
             'type' => $type,
             'options' => $options,
-        );
+        ];
 
         return $this;
     }
@@ -83,7 +83,7 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
     /**
      * {@inheritdoc}
      */
-    public function create($name, $type = null, array $options = array())
+    public function create($name, $type = null, array $options = [])
     {
         if ($this->locked) {
             throw new BadMethodCallException('FormBuilder methods cannot be accessed anymore once the builder is turned into a FormConfigInterface instance.');
@@ -188,8 +188,8 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
         /** @var $config self */
         $config = parent::getFormConfig();
 
-        $config->children = array();
-        $config->unresolvedChildren = array();
+        $config->children = [];
+        $config->unresolvedChildren = [];
 
         return $config;
     }
@@ -256,6 +256,6 @@ class FormBuilder extends FormConfigBuilder implements \IteratorAggregate, FormB
             $this->children[$name] = $this->create($name, $info['type'], $info['options']);
         }
 
-        $this->unresolvedChildren = array();
+        $this->unresolvedChildren = [];
     }
 }
diff --git a/src/Symfony/Component/Form/FormBuilderInterface.php b/src/Symfony/Component/Form/FormBuilderInterface.php
index 32582336ab..1ed695ed04 100644
--- a/src/Symfony/Component/Form/FormBuilderInterface.php
+++ b/src/Symfony/Component/Form/FormBuilderInterface.php
@@ -29,7 +29,7 @@ interface FormBuilderInterface extends \Traversable, \Countable, FormConfigBuild
      *
      * @return self
      */
-    public function add($child, $type = null, array $options = array());
+    public function add($child, $type = null, array $options = []);
 
     /**
      * Creates a form builder.
@@ -40,7 +40,7 @@ interface FormBuilderInterface extends \Traversable, \Countable, FormConfigBuild
      *
      * @return self
      */
-    public function create($name, $type = null, array $options = array());
+    public function create($name, $type = null, array $options = []);
 
     /**
      * Returns a child by name.
diff --git a/src/Symfony/Component/Form/FormConfigBuilder.php b/src/Symfony/Component/Form/FormConfigBuilder.php
index 5040363e3e..344751b159 100644
--- a/src/Symfony/Component/Form/FormConfigBuilder.php
+++ b/src/Symfony/Component/Form/FormConfigBuilder.php
@@ -82,12 +82,12 @@ class FormConfigBuilder implements FormConfigBuilderInterface
     /**
      * @var array
      */
-    private $viewTransformers = array();
+    private $viewTransformers = [];
 
     /**
      * @var array
      */
-    private $modelTransformers = array();
+    private $modelTransformers = [];
 
     /**
      * @var DataMapperInterface
@@ -117,7 +117,7 @@ class FormConfigBuilder implements FormConfigBuilderInterface
     /**
      * @var array
      */
-    private $attributes = array();
+    private $attributes = [];
 
     /**
      * @var mixed
@@ -175,7 +175,7 @@ class FormConfigBuilder implements FormConfigBuilderInterface
      * @throws InvalidArgumentException if the data class is not a valid class or if
      *                                  the name contains invalid characters
      */
-    public function __construct($name, ?string $dataClass, EventDispatcherInterface $dispatcher, array $options = array())
+    public function __construct($name, ?string $dataClass, EventDispatcherInterface $dispatcher, array $options = [])
     {
         self::validateName($name);
 
@@ -244,7 +244,7 @@ class FormConfigBuilder implements FormConfigBuilderInterface
             throw new BadMethodCallException('FormConfigBuilder methods cannot be accessed anymore once the builder is turned into a FormConfigInterface instance.');
         }
 
-        $this->viewTransformers = array();
+        $this->viewTransformers = [];
 
         return $this;
     }
@@ -276,7 +276,7 @@ class FormConfigBuilder implements FormConfigBuilderInterface
             throw new BadMethodCallException('FormConfigBuilder methods cannot be accessed anymore once the builder is turned into a FormConfigInterface instance.');
         }
 
-        $this->modelTransformers = array();
+        $this->modelTransformers = [];
 
         return $this;
     }
diff --git a/src/Symfony/Component/Form/FormError.php b/src/Symfony/Component/Form/FormError.php
index e8921ce10b..61be23c214 100644
--- a/src/Symfony/Component/Form/FormError.php
+++ b/src/Symfony/Component/Form/FormError.php
@@ -47,7 +47,7 @@ class FormError implements \Serializable
      *
      * @see \Symfony\Component\Translation\Translator
      */
-    public function __construct(?string $message, string $messageTemplate = null, array $messageParameters = array(), int $messagePluralization = null, $cause = null)
+    public function __construct(?string $message, string $messageTemplate = null, array $messageParameters = [], int $messagePluralization = null, $cause = null)
     {
         $this->message = $message;
         $this->messageTemplate = $messageTemplate ?: $message;
@@ -141,13 +141,13 @@ class FormError implements \Serializable
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             $this->message,
             $this->messageTemplate,
             $this->messageParameters,
             $this->messagePluralization,
             $this->cause,
-        ));
+        ]);
     }
 
     /**
@@ -157,6 +157,6 @@ class FormError implements \Serializable
      */
     public function unserialize($serialized)
     {
-        list($this->message, $this->messageTemplate, $this->messageParameters, $this->messagePluralization, $this->cause) = unserialize($serialized, array('allowed_classes' => false));
+        list($this->message, $this->messageTemplate, $this->messageParameters, $this->messagePluralization, $this->cause) = unserialize($serialized, ['allowed_classes' => false]);
     }
 }
diff --git a/src/Symfony/Component/Form/FormErrorIterator.php b/src/Symfony/Component/Form/FormErrorIterator.php
index a534918406..2cc53c0923 100644
--- a/src/Symfony/Component/Form/FormErrorIterator.php
+++ b/src/Symfony/Component/Form/FormErrorIterator.php
@@ -261,7 +261,7 @@ class FormErrorIterator implements \RecursiveIterator, \SeekableIterator, \Array
     public function findByCodes($codes)
     {
         $codes = (array) $codes;
-        $errors = array();
+        $errors = [];
         foreach ($this as $error) {
             $cause = $error->getCause();
             if ($cause instanceof ConstraintViolation && \in_array($cause->getCode(), $codes, true)) {
diff --git a/src/Symfony/Component/Form/FormFactory.php b/src/Symfony/Component/Form/FormFactory.php
index 3f18ccf325..d474d5903f 100644
--- a/src/Symfony/Component/Form/FormFactory.php
+++ b/src/Symfony/Component/Form/FormFactory.php
@@ -25,7 +25,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function create($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array())
+    public function create($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = [])
     {
         return $this->createBuilder($type, $data, $options)->getForm();
     }
@@ -33,7 +33,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function createNamed($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array())
+    public function createNamed($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = [])
     {
         return $this->createNamedBuilder($name, $type, $data, $options)->getForm();
     }
@@ -41,7 +41,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function createForProperty($class, $property, $data = null, array $options = array())
+    public function createForProperty($class, $property, $data = null, array $options = [])
     {
         return $this->createBuilderForProperty($class, $property, $data, $options)->getForm();
     }
@@ -49,7 +49,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function createBuilder($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array())
+    public function createBuilder($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = [])
     {
         if (!\is_string($type)) {
             throw new UnexpectedTypeException($type, 'string');
@@ -61,7 +61,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function createNamedBuilder($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array())
+    public function createNamedBuilder($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = [])
     {
         if (null !== $data && !array_key_exists('data', $options)) {
             $options['data'] = $data;
@@ -85,7 +85,7 @@ class FormFactory implements FormFactoryInterface
     /**
      * {@inheritdoc}
      */
-    public function createBuilderForProperty($class, $property, $data = null, array $options = array())
+    public function createBuilderForProperty($class, $property, $data = null, array $options = [])
     {
         if (null === $guesser = $this->registry->getTypeGuesser()) {
             return $this->createNamedBuilder($property, 'Symfony\Component\Form\Extension\Core\Type\TextType', $data, $options);
@@ -102,23 +102,23 @@ class FormFactory implements FormFactoryInterface
         $pattern = $patternGuess ? $patternGuess->getValue() : null;
 
         if (null !== $pattern) {
-            $options = array_replace_recursive(array('attr' => array('pattern' => $pattern)), $options);
+            $options = array_replace_recursive(['attr' => ['pattern' => $pattern]], $options);
         }
 
         if (null !== $maxLength) {
-            $options = array_replace_recursive(array('attr' => array('maxlength' => $maxLength)), $options);
+            $options = array_replace_recursive(['attr' => ['maxlength' => $maxLength]], $options);
         }
 
         if ($requiredGuess) {
-            $options = array_merge(array('required' => $requiredGuess->getValue()), $options);
+            $options = array_merge(['required' => $requiredGuess->getValue()], $options);
         }
 
         // user options may override guessed options
         if ($typeGuess) {
-            $attrs = array();
+            $attrs = [];
             $typeGuessOptions = $typeGuess->getOptions();
             if (isset($typeGuessOptions['attr']) && isset($options['attr'])) {
-                $attrs = array('attr' => array_merge($typeGuessOptions['attr'], $options['attr']));
+                $attrs = ['attr' => array_merge($typeGuessOptions['attr'], $options['attr'])];
             }
 
             $options = array_merge($typeGuessOptions, $options, $attrs);
diff --git a/src/Symfony/Component/Form/FormFactoryBuilder.php b/src/Symfony/Component/Form/FormFactoryBuilder.php
index 59f5f4910d..fc8b12ffad 100644
--- a/src/Symfony/Component/Form/FormFactoryBuilder.php
+++ b/src/Symfony/Component/Form/FormFactoryBuilder.php
@@ -26,22 +26,22 @@ class FormFactoryBuilder implements FormFactoryBuilderInterface
     /**
      * @var FormExtensionInterface[]
      */
-    private $extensions = array();
+    private $extensions = [];
 
     /**
      * @var FormTypeInterface[]
      */
-    private $types = array();
+    private $types = [];
 
     /**
      * @var FormTypeExtensionInterface[]
      */
-    private $typeExtensions = array();
+    private $typeExtensions = [];
 
     /**
      * @var FormTypeGuesserInterface[]
      */
-    private $typeGuessers = array();
+    private $typeGuessers = [];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Form/FormFactoryInterface.php b/src/Symfony/Component/Form/FormFactoryInterface.php
index e945a2eb31..333652ddf8 100644
--- a/src/Symfony/Component/Form/FormFactoryInterface.php
+++ b/src/Symfony/Component/Form/FormFactoryInterface.php
@@ -31,7 +31,7 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the given type
      */
-    public function create($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array());
+    public function create($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = []);
 
     /**
      * Returns a form.
@@ -47,7 +47,7 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the given type
      */
-    public function createNamed($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array());
+    public function createNamed($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = []);
 
     /**
      * Returns a form for a property of a class.
@@ -63,7 +63,7 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the form type
      */
-    public function createForProperty($class, $property, $data = null, array $options = array());
+    public function createForProperty($class, $property, $data = null, array $options = []);
 
     /**
      * Returns a form builder.
@@ -76,7 +76,7 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the given type
      */
-    public function createBuilder($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array());
+    public function createBuilder($type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = []);
 
     /**
      * Returns a form builder.
@@ -90,7 +90,7 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the given type
      */
-    public function createNamedBuilder($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = array());
+    public function createNamedBuilder($name, $type = 'Symfony\Component\Form\Extension\Core\Type\FormType', $data = null, array $options = []);
 
     /**
      * Returns a form builder for a property of a class.
@@ -107,5 +107,5 @@ interface FormFactoryInterface
      *
      * @throws \Symfony\Component\OptionsResolver\Exception\InvalidOptionsException if any given option is not applicable to the form type
      */
-    public function createBuilderForProperty($class, $property, $data = null, array $options = array());
+    public function createBuilderForProperty($class, $property, $data = null, array $options = []);
 }
diff --git a/src/Symfony/Component/Form/FormInterface.php b/src/Symfony/Component/Form/FormInterface.php
index a0e9b636c5..565b79af39 100644
--- a/src/Symfony/Component/Form/FormInterface.php
+++ b/src/Symfony/Component/Form/FormInterface.php
@@ -51,7 +51,7 @@ interface FormInterface extends \ArrayAccess, \Traversable, \Countable
      * @throws Exception\LogicException            when trying to add a child to a non-compound form
      * @throws Exception\UnexpectedTypeException   if $child or $type has an unexpected type
      */
-    public function add($child, $type = null, array $options = array());
+    public function add($child, $type = null, array $options = []);
 
     /**
      * Returns the child with the given name.
diff --git a/src/Symfony/Component/Form/FormRegistry.php b/src/Symfony/Component/Form/FormRegistry.php
index 67d1146080..1446976191 100644
--- a/src/Symfony/Component/Form/FormRegistry.php
+++ b/src/Symfony/Component/Form/FormRegistry.php
@@ -28,12 +28,12 @@ class FormRegistry implements FormRegistryInterface
      *
      * @var FormExtensionInterface[] An array of FormExtensionInterface
      */
-    private $extensions = array();
+    private $extensions = [];
 
     /**
      * @var ResolvedFormTypeInterface[]
      */
-    private $types = array();
+    private $types = [];
 
     /**
      * @var FormTypeGuesserInterface|false|null
@@ -45,7 +45,7 @@ class FormRegistry implements FormRegistryInterface
      */
     private $resolvedTypeFactory;
 
-    private $checkedTypes = array();
+    private $checkedTypes = [];
 
     /**
      * @param FormExtensionInterface[]         $extensions          An array of FormExtensionInterface
@@ -108,12 +108,12 @@ class FormRegistry implements FormRegistryInterface
      */
     private function resolveType(FormTypeInterface $type)
     {
-        $typeExtensions = array();
+        $typeExtensions = [];
         $parentType = $type->getParent();
         $fqcn = \get_class($type);
 
         if (isset($this->checkedTypes[$fqcn])) {
-            $types = implode(' > ', array_merge(array_keys($this->checkedTypes), array($fqcn)));
+            $types = implode(' > ', array_merge(array_keys($this->checkedTypes), [$fqcn]));
             throw new LogicException(sprintf('Circular reference detected for form type "%s" (%s).', $fqcn, $types));
         }
 
@@ -161,7 +161,7 @@ class FormRegistry implements FormRegistryInterface
     public function getTypeGuesser()
     {
         if (false === $this->guesser) {
-            $guessers = array();
+            $guessers = [];
 
             foreach ($this->extensions as $extension) {
                 $guesser = $extension->getTypeGuesser();
diff --git a/src/Symfony/Component/Form/FormRenderer.php b/src/Symfony/Component/Form/FormRenderer.php
index 31307ac288..b3a199775a 100644
--- a/src/Symfony/Component/Form/FormRenderer.php
+++ b/src/Symfony/Component/Form/FormRenderer.php
@@ -27,9 +27,9 @@ class FormRenderer implements FormRendererInterface
 
     private $engine;
     private $csrfTokenManager;
-    private $blockNameHierarchyMap = array();
-    private $hierarchyLevelMap = array();
-    private $variableStack = array();
+    private $blockNameHierarchyMap = [];
+    private $hierarchyLevelMap = [];
+    private $variableStack = [];
 
     public function __construct(FormRendererEngineInterface $engine, CsrfTokenManagerInterface $csrfTokenManager = null)
     {
@@ -68,7 +68,7 @@ class FormRenderer implements FormRendererInterface
     /**
      * {@inheritdoc}
      */
-    public function renderBlock(FormView $view, $blockName, array $variables = array())
+    public function renderBlock(FormView $view, $blockName, array $variables = [])
     {
         $resource = $this->engine->getResourceForBlockName($view, $blockName);
 
@@ -81,7 +81,7 @@ class FormRenderer implements FormRendererInterface
         // The variables are cached globally for a view (instead of for the
         // current suffix)
         if (!isset($this->variableStack[$viewCacheKey])) {
-            $this->variableStack[$viewCacheKey] = array();
+            $this->variableStack[$viewCacheKey] = [];
 
             // The default variable scope contains all view variables, merged with
             // the variables passed explicitly to the helper
@@ -127,7 +127,7 @@ class FormRenderer implements FormRendererInterface
     /**
      * {@inheritdoc}
      */
-    public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $variables = array())
+    public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $variables = [])
     {
         $renderOnlyOnce = 'row' === $blockNameSuffix || 'widget' === $blockNameSuffix;
 
@@ -173,7 +173,7 @@ class FormRenderer implements FormRendererInterface
             // INITIAL CALL
             // Calculate the hierarchy of template blocks and start on
             // the bottom level of the hierarchy (= "_<id>_<section>" block)
-            $blockNameHierarchy = array();
+            $blockNameHierarchy = [];
             foreach ($view->vars['block_prefixes'] as $blockNamePrefix) {
                 $blockNameHierarchy[] = $blockNamePrefix.'_'.$blockNameSuffix;
             }
@@ -193,7 +193,7 @@ class FormRenderer implements FormRendererInterface
         // The variables are cached globally for a view (instead of for the
         // current suffix)
         if (!isset($this->variableStack[$viewCacheKey])) {
-            $this->variableStack[$viewCacheKey] = array();
+            $this->variableStack[$viewCacheKey] = [];
 
             // The default variable scope contains all view variables, merged with
             // the variables passed explicitly to the helper
@@ -284,7 +284,7 @@ class FormRenderer implements FormRendererInterface
      */
     public function humanize($text)
     {
-        return ucfirst(strtolower(trim(preg_replace(array('/([A-Z])/', '/[_\s]+/'), array('_$1', ' '), $text))));
+        return ucfirst(strtolower(trim(preg_replace(['/([A-Z])/', '/[_\s]+/'], ['_$1', ' '], $text))));
     }
 
     /**
diff --git a/src/Symfony/Component/Form/FormRendererEngineInterface.php b/src/Symfony/Component/Form/FormRendererEngineInterface.php
index a6906538f9..6635a63b94 100644
--- a/src/Symfony/Component/Form/FormRendererEngineInterface.php
+++ b/src/Symfony/Component/Form/FormRendererEngineInterface.php
@@ -136,5 +136,5 @@ interface FormRendererEngineInterface
      *
      * @return string The HTML markup
      */
-    public function renderBlock(FormView $view, $resource, $blockName, array $variables = array());
+    public function renderBlock(FormView $view, $resource, $blockName, array $variables = []);
 }
diff --git a/src/Symfony/Component/Form/FormRendererInterface.php b/src/Symfony/Component/Form/FormRendererInterface.php
index f116c9634c..930f61d583 100644
--- a/src/Symfony/Component/Form/FormRendererInterface.php
+++ b/src/Symfony/Component/Form/FormRendererInterface.php
@@ -45,7 +45,7 @@ interface FormRendererInterface
      *
      * @return string The HTML markup
      */
-    public function renderBlock(FormView $view, $blockName, array $variables = array());
+    public function renderBlock(FormView $view, $blockName, array $variables = []);
 
     /**
      * Searches and renders a block for a given name suffix.
@@ -63,7 +63,7 @@ interface FormRendererInterface
      *
      * @return string The HTML markup
      */
-    public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $variables = array());
+    public function searchAndRenderBlock(FormView $view, $blockNameSuffix, array $variables = []);
 
     /**
      * Renders a CSRF token.
diff --git a/src/Symfony/Component/Form/FormTypeGuesserChain.php b/src/Symfony/Component/Form/FormTypeGuesserChain.php
index c0cbd0bde1..68097dc98b 100644
--- a/src/Symfony/Component/Form/FormTypeGuesserChain.php
+++ b/src/Symfony/Component/Form/FormTypeGuesserChain.php
@@ -16,7 +16,7 @@ use Symfony\Component\Form\Guess\Guess;
 
 class FormTypeGuesserChain implements FormTypeGuesserInterface
 {
-    private $guessers = array();
+    private $guessers = [];
 
     /**
      * @param FormTypeGuesserInterface[] $guessers Guessers as instances of FormTypeGuesserInterface
@@ -89,7 +89,7 @@ class FormTypeGuesserChain implements FormTypeGuesserInterface
      */
     private function guess(\Closure $closure)
     {
-        $guesses = array();
+        $guesses = [];
 
         foreach ($this->guessers as $guesser) {
             if ($guess = $closure($guesser)) {
diff --git a/src/Symfony/Component/Form/FormView.php b/src/Symfony/Component/Form/FormView.php
index 25e9980f31..0d1310b22d 100644
--- a/src/Symfony/Component/Form/FormView.php
+++ b/src/Symfony/Component/Form/FormView.php
@@ -21,10 +21,10 @@ class FormView implements \ArrayAccess, \IteratorAggregate, \Countable
     /**
      * The variables assigned to this view.
      */
-    public $vars = array(
+    public $vars = [
         'value' => null,
-        'attr' => array(),
-    );
+        'attr' => [],
+    ];
 
     /**
      * The parent view.
@@ -36,7 +36,7 @@ class FormView implements \ArrayAccess, \IteratorAggregate, \Countable
      *
      * @var FormView[]
      */
-    public $children = array();
+    public $children = [];
 
     /**
      * Is the form attached to this renderer rendered?
diff --git a/src/Symfony/Component/Form/Forms.php b/src/Symfony/Component/Form/Forms.php
index 9d190620fd..a67c436fe0 100644
--- a/src/Symfony/Component/Form/Forms.php
+++ b/src/Symfony/Component/Form/Forms.php
@@ -26,9 +26,9 @@ use Symfony\Component\Form\Extension\Core\CoreExtension;
  *         ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType')
  *         ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType')
  *         ->add('age', 'Symfony\Component\Form\Extension\Core\Type\IntegerType')
- *         ->add('color', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array(
- *             'choices' => array('Red' => 'r', 'Blue' => 'b'),
- *         ))
+ *         ->add('color', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', [
+ *             'choices' => ['Red' => 'r', 'Blue' => 'b'],
+ *         ])
  *         ->getForm();
  *
  * You can also add custom extensions to the form factory:
@@ -68,9 +68,9 @@ use Symfony\Component\Form\Extension\Core\CoreExtension;
  *     use Symfony\Component\Form\Extension\Templating\TemplatingExtension;
  *
  *     $formFactory = Forms::createFormFactoryBuilder()
- *         ->addExtension(new TemplatingExtension($engine, null, array(
+ *         ->addExtension(new TemplatingExtension($engine, null, [
  *             'FrameworkBundle:Form',
- *         )))
+ *         ]))
  *         ->getFormFactory();
  *
  * The next example shows how to include the "<table>" layout:
@@ -78,10 +78,10 @@ use Symfony\Component\Form\Extension\Core\CoreExtension;
  *     use Symfony\Component\Form\Extension\Templating\TemplatingExtension;
  *
  *     $formFactory = Forms::createFormFactoryBuilder()
- *         ->addExtension(new TemplatingExtension($engine, null, array(
+ *         ->addExtension(new TemplatingExtension($engine, null, [
  *             'FrameworkBundle:Form',
  *             'FrameworkBundle:FormTable',
- *         )))
+ *         ]))
  *         ->getFormFactory();
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
diff --git a/src/Symfony/Component/Form/NativeRequestHandler.php b/src/Symfony/Component/Form/NativeRequestHandler.php
index 13fdf9b2d6..fe0b3b7ab7 100644
--- a/src/Symfony/Component/Form/NativeRequestHandler.php
+++ b/src/Symfony/Component/Form/NativeRequestHandler.php
@@ -26,13 +26,13 @@ class NativeRequestHandler implements RequestHandlerInterface
     /**
      * The allowed keys of the $_FILES array.
      */
-    private static $fileKeys = array(
+    private static $fileKeys = [
         'error',
         'name',
         'size',
         'tmp_name',
         'type',
-    );
+    ];
 
     public function __construct(ServerParams $params = null)
     {
@@ -80,13 +80,13 @@ class NativeRequestHandler implements RequestHandlerInterface
                 $form->addError(new FormError(
                     $form->getConfig()->getOption('upload_max_size_message')(),
                     null,
-                    array('{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize())
+                    ['{{ max }}' => $this->serverParams->getNormalizedIniPostMaxSize()]
                 ));
 
                 return;
             }
 
-            $fixedFiles = array();
+            $fixedFiles = [];
             foreach ($_FILES as $fileKey => $file) {
                 $fixedFiles[$fileKey] = self::stripEmptyFiles(self::fixPhpFilesArray($file));
             }
@@ -95,7 +95,7 @@ class NativeRequestHandler implements RequestHandlerInterface
                 $params = $_POST;
                 $files = $fixedFiles;
             } elseif (array_key_exists($name, $_POST) || array_key_exists($name, $fixedFiles)) {
-                $default = $form->getConfig()->getCompound() ? array() : null;
+                $default = $form->getConfig()->getCompound() ? [] : null;
                 $params = array_key_exists($name, $_POST) ? $_POST[$name] : $default;
                 $files = array_key_exists($name, $fixedFiles) ? $fixedFiles[$name] : $default;
             } else {
@@ -183,13 +183,13 @@ class NativeRequestHandler implements RequestHandlerInterface
         }
 
         foreach ($data['name'] as $key => $name) {
-            $files[$key] = self::fixPhpFilesArray(array(
+            $files[$key] = self::fixPhpFilesArray([
                 'error' => $data['error'][$key],
                 'name' => $name,
                 'type' => $data['type'][$key],
                 'tmp_name' => $data['tmp_name'][$key],
                 'size' => $data['size'][$key],
-            ));
+            ]);
         }
 
         return $files;
diff --git a/src/Symfony/Component/Form/PreloadedExtension.php b/src/Symfony/Component/Form/PreloadedExtension.php
index 4b1f3e5213..ce0083234e 100644
--- a/src/Symfony/Component/Form/PreloadedExtension.php
+++ b/src/Symfony/Component/Form/PreloadedExtension.php
@@ -20,8 +20,8 @@ use Symfony\Component\Form\Exception\InvalidArgumentException;
  */
 class PreloadedExtension implements FormExtensionInterface
 {
-    private $types = array();
-    private $typeExtensions = array();
+    private $types = [];
+    private $typeExtensions = [];
     private $typeGuesser;
 
     /**
@@ -76,7 +76,7 @@ class PreloadedExtension implements FormExtensionInterface
     {
         return isset($this->typeExtensions[$name])
             ? $this->typeExtensions[$name]
-            : array();
+            : [];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/ResolvedFormType.php b/src/Symfony/Component/Form/ResolvedFormType.php
index 4a0c9588a7..e4ca7bbd94 100644
--- a/src/Symfony/Component/Form/ResolvedFormType.php
+++ b/src/Symfony/Component/Form/ResolvedFormType.php
@@ -42,7 +42,7 @@ class ResolvedFormType implements ResolvedFormTypeInterface
      */
     private $optionsResolver;
 
-    public function __construct(FormTypeInterface $innerType, array $typeExtensions = array(), ResolvedFormTypeInterface $parent = null)
+    public function __construct(FormTypeInterface $innerType, array $typeExtensions = [], ResolvedFormTypeInterface $parent = null)
     {
         foreach ($typeExtensions as $extension) {
             if (!$extension instanceof FormTypeExtensionInterface) {
@@ -90,7 +90,7 @@ class ResolvedFormType implements ResolvedFormTypeInterface
     /**
      * {@inheritdoc}
      */
-    public function createBuilder(FormFactoryInterface $factory, $name, array $options = array())
+    public function createBuilder(FormFactoryInterface $factory, $name, array $options = [])
     {
         $options = $this->getOptionsResolver()->resolve($options);
 
diff --git a/src/Symfony/Component/Form/ResolvedFormTypeInterface.php b/src/Symfony/Component/Form/ResolvedFormTypeInterface.php
index dc3b81d2fa..c4ab1d6477 100644
--- a/src/Symfony/Component/Form/ResolvedFormTypeInterface.php
+++ b/src/Symfony/Component/Form/ResolvedFormTypeInterface.php
@@ -57,7 +57,7 @@ interface ResolvedFormTypeInterface
      *
      * @return FormBuilderInterface The created form builder
      */
-    public function createBuilder(FormFactoryInterface $factory, $name, array $options = array());
+    public function createBuilder(FormFactoryInterface $factory, $name, array $options = []);
 
     /**
      * Creates a new form view for a form of this type.
diff --git a/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php b/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
index 28e6cb385e..7aa7c1c438 100644
--- a/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
+++ b/src/Symfony/Component/Form/Test/FormIntegrationTestCase.php
@@ -37,21 +37,21 @@ abstract class FormIntegrationTestCase extends TestCase
 
     protected function getExtensions()
     {
-        return array();
+        return [];
     }
 
     protected function getTypeExtensions()
     {
-        return array();
+        return [];
     }
 
     protected function getTypes()
     {
-        return array();
+        return [];
     }
 
     protected function getTypeGuessers()
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Form/Test/TypeTestCase.php b/src/Symfony/Component/Form/Test/TypeTestCase.php
index aa7516f563..41e0333b09 100644
--- a/src/Symfony/Component/Form/Test/TypeTestCase.php
+++ b/src/Symfony/Component/Form/Test/TypeTestCase.php
@@ -44,7 +44,7 @@ abstract class TypeTestCase extends FormIntegrationTestCase
 
     protected function getExtensions()
     {
-        $extensions = array();
+        $extensions = [];
 
         if (\in_array(ValidatorExtensionTrait::class, class_uses($this))) {
             $extensions[] = $this->getValidatorExtension();
diff --git a/src/Symfony/Component/Form/Tests/AbstractDivLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractDivLayoutTest.php
index 36bb31c301..ab84449749 100644
--- a/src/Symfony/Component/Form/Tests/AbstractDivLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractDivLayoutTest.php
@@ -39,11 +39,11 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
     public function testRowOverrideVariables()
     {
         $view = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType')->createView();
-        $html = $this->renderRow($view, array(
-            'attr' => array('class' => 'my&class'),
+        $html = $this->renderRow($view, [
+            'attr' => ['class' => 'my&class'],
             'label' => 'foo&bar',
-            'label_attr' => array('class' => 'my&label&class'),
-        ));
+            'label_attr' => ['class' => 'my&label&class'],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/div
@@ -283,11 +283,11 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testCollection()
     {
-        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', array('a', 'b'), array(
+        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', ['a', 'b'], [
             'entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div[./input[@type="text"][@value="a"]]
@@ -301,15 +301,15 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
     // https://github.com/symfony/symfony/issues/5038
     public function testCollectionWithAlternatingRowTypes()
     {
-        $data = array(
-            array('title' => 'a'),
-            array('title' => 'b'),
-        );
-        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', $data, array(
+        $data = [
+            ['title' => 'a'],
+            ['title' => 'b'],
+        ];
+        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', $data, [
             'entry_type' => 'Symfony\Component\Form\Tests\Fixtures\AlternatingRowType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div[./div/div/input[@type="text"][@value="a"]]
@@ -323,11 +323,11 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testEmptyCollection()
     {
-        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', array(), array(
+        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', [], [
             'entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [./input[@type="hidden"][@id="names__token"]]
     [count(./div)=0]
@@ -340,15 +340,15 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
         $collection = $this->factory->createNamedBuilder(
             'collection',
             'Symfony\Component\Form\Extension\Core\Type\CollectionType',
-            array('a', 'b'),
-            array('entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType')
+            ['a', 'b'],
+            ['entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType']
         );
 
         $form = $this->factory->createNamedBuilder('form', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             ->add($collection)
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -385,10 +385,10 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             ->getForm();
 
         // include ampersands everywhere to validate escaping
-        $html = $this->renderForm($form->createView(), array(
+        $html = $this->renderForm($form->createView(), [
             'id' => 'my&id',
-            'attr' => array('class' => 'my&class'),
-        ));
+            'attr' => ['class' => 'my&class'],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/form
@@ -426,7 +426,7 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -451,14 +451,14 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             ->add($this->factory
-                ->createNamedBuilder('child', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array('error_bubbling' => false))
+                ->createNamedBuilder('child', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, ['error_bubbling' => false])
                 ->add('grandChild', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             )
             ->getForm();
 
         $form->get('child')->addError(new FormError('[trans]Error![/trans]'));
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div/label
@@ -483,7 +483,7 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             )
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -496,11 +496,11 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testRepeated()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', [
             'type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -522,13 +522,13 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testRepeatedWithCustomOptions()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', null, [
             // the global required value cannot be overridden
-            'first_options' => array('label' => 'Test', 'required' => false),
-            'second_options' => array('label' => 'Test2'),
-        ));
+            'first_options' => ['label' => 'Test', 'required' => false],
+            'second_options' => ['label' => 'Test2'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -554,7 +554,7 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             ->add('name', 'Symfony\Component\Form\Extension\Core\Type\SearchType')
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -586,9 +586,9 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testLabelIsNotRenderedWhenSetToFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => false,
-        ));
+        ]);
         $html = $this->renderRow($form->createView());
 
         $this->assertMatchesXpath($html,
@@ -637,7 +637,7 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
         $this->setTheme($view, $parentTheme);
         $this->setTheme($view['child'], $childTheme);
 
-        $this->assertWidgetMatchesXpath($view, array(),
+        $this->assertWidgetMatchesXpath($view, [],
 '/div
     [
         ./div
@@ -669,11 +669,11 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
      */
     public function testCollectionRowWithCustomBlock()
     {
-        $collection = array('one', 'two', 'three');
+        $collection = ['one', 'two', 'three'];
         $form = $this->factory->createNamedBuilder('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', $collection)
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div[./label[.="Custom label: [trans]0[/trans]"]]
@@ -690,13 +690,13 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
      */
     public function testChoiceRowWithCustomBlock()
     {
-        $form = $this->factory->createNamedBuilder('name_c', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', 'a', array(
-                'choices' => array('ChoiceA' => 'a', 'ChoiceB' => 'b'),
+        $form = $this->factory->createNamedBuilder('name_c', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', 'a', [
+                'choices' => ['ChoiceA' => 'a', 'ChoiceB' => 'b'],
                 'expanded' => true,
-            ))
+            ])
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./label[.="Custom name label: [trans]ChoiceA[/trans]"]
@@ -708,14 +708,14 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -730,8 +730,8 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -741,9 +741,9 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -761,16 +761,16 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testSingleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -785,14 +785,14 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsAsFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => false,
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@value="&a"][@checked]
@@ -807,8 +807,8 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'choice_label' => function ($choice, $label, $value) {
                 if ('&b' === $choice) {
                     return false;
@@ -818,9 +818,9 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@value="&a"][@checked]
@@ -838,16 +838,16 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testMultipleChoiceExpandedWithLabelsSetFalseByCallable()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'choice_label' => function () {
                 return false;
             },
             'multiple' => true,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@value="&a"][@checked]
@@ -901,16 +901,16 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
         $this->renderWidget($view['field1']);
 
         // Rest should only contain field2, but isn't rendered
-        $html = $this->renderEnd($view, array('render_rest' => false));
+        $html = $this->renderEnd($view, ['render_rest' => false]);
 
         $this->assertEquals('</form>', $html);
     }
 
     public function testWidgetContainerAttributes()
     {
-        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
-            'attr' => array('class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
+            'attr' => ['class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $form->add('text', 'Symfony\Component\Form\Extension\Core\Type\TextType');
 
@@ -922,9 +922,9 @@ abstract class AbstractDivLayoutTest extends AbstractLayoutTest
 
     public function testWidgetContainerAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
diff --git a/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php b/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
index 815b4f808a..c3fa1b6cf9 100644
--- a/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractExtensionTest.php
@@ -35,7 +35,7 @@ class ConcreteExtension extends AbstractExtension
 {
     protected function loadTypes()
     {
-        return array(new FooType());
+        return [new FooType()];
     }
 
     protected function loadTypeGuesser()
diff --git a/src/Symfony/Component/Form/Tests/AbstractFormTest.php b/src/Symfony/Component/Form/Tests/AbstractFormTest.php
index 977b5f40e0..0ea55f9208 100644
--- a/src/Symfony/Component/Form/Tests/AbstractFormTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractFormTest.php
@@ -60,7 +60,7 @@ abstract class AbstractFormTest extends TestCase
      *
      * @return FormBuilder
      */
-    protected function getBuilder($name = 'name', EventDispatcherInterface $dispatcher = null, $dataClass = null, array $options = array())
+    protected function getBuilder($name = 'name', EventDispatcherInterface $dispatcher = null, $dataClass = null, array $options = [])
     {
         return new FormBuilder($name, $dataClass, $dispatcher ?: $this->dispatcher, $this->factory, $options);
     }
diff --git a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
index 40d4e5688c..f8997d546e 100644
--- a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
@@ -20,7 +20,7 @@ use Symfony\Component\Form\Test\FormIntegrationTestCase;
 abstract class AbstractLayoutTest extends FormIntegrationTestCase
 {
     protected $csrfTokenManager;
-    protected $testableFeatures = array();
+    protected $testableFeatures = [];
 
     protected function setUp()
     {
@@ -37,9 +37,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     protected function getExtensions()
     {
-        return array(
+        return [
             new CsrfExtension($this->csrfTokenManager),
-        );
+        ];
     }
 
     protected function tearDown()
@@ -92,10 +92,10 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     protected function assertWidgetMatchesXpath(FormView $view, array $vars, $xpath)
     {
         // include ampersands everywhere to validate escaping
-        $html = $this->renderWidget($view, array_merge(array(
+        $html = $this->renderWidget($view, array_merge([
             'id' => 'my&id',
-            'attr' => array('class' => 'my&class'),
-        ), $vars));
+            'attr' => ['class' => 'my&class'],
+        ], $vars));
 
         if (!isset($vars['id'])) {
             $xpath = trim($xpath).'
@@ -110,9 +110,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
         $this->assertMatchesXpath($html, $xpath);
     }
 
-    abstract protected function renderForm(FormView $view, array $vars = array());
+    abstract protected function renderForm(FormView $view, array $vars = []);
 
-    abstract protected function renderLabel(FormView $view, $label = null, array $vars = array());
+    abstract protected function renderLabel(FormView $view, $label = null, array $vars = []);
 
     protected function renderHelp(FormView $view)
     {
@@ -121,15 +121,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     abstract protected function renderErrors(FormView $view);
 
-    abstract protected function renderWidget(FormView $view, array $vars = array());
+    abstract protected function renderWidget(FormView $view, array $vars = []);
 
-    abstract protected function renderRow(FormView $view, array $vars = array());
+    abstract protected function renderRow(FormView $view, array $vars = []);
 
-    abstract protected function renderRest(FormView $view, array $vars = array());
+    abstract protected function renderRest(FormView $view, array $vars = []);
 
-    abstract protected function renderStart(FormView $view, array $vars = array());
+    abstract protected function renderStart(FormView $view, array $vars = []);
 
-    abstract protected function renderEnd(FormView $view, array $vars = array());
+    abstract protected function renderEnd(FormView $view, array $vars = []);
 
     abstract protected function setTheme(FormView $view, array $themes, $useDefaultThemes = true);
 
@@ -137,7 +137,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -150,9 +150,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'translation_domain' => false,
-        ));
+        ]);
 
         $this->assertMatchesXpath($this->renderLabel($form->createView()),
 '/label
@@ -166,7 +166,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType');
         $view = $form->createView();
-        $this->renderWidget($view, array('label' => 'foo'));
+        $this->renderWidget($view, ['label' => 'foo']);
         $html = $this->renderLabel($view);
 
         $this->assertMatchesXpath($html,
@@ -179,9 +179,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelWithCustomTextPassedAsOption()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
+        ]);
         $html = $this->renderLabel($form->createView());
 
         $this->assertMatchesXpath($html,
@@ -207,9 +207,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelWithCustomTextPassedAsOptionAndDirectly()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
+        ]);
         $html = $this->renderLabel($form->createView(), 'Overridden label');
 
         $this->assertMatchesXpath($html,
@@ -223,11 +223,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     public function testLabelDoesNotRenderFieldAttributes()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -240,11 +240,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     public function testLabelWithCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -257,11 +257,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     public function testLabelWithCustomTextAndCustomAttributesPassedDirectly()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType');
-        $html = $this->renderLabel($form->createView(), 'Custom label', array(
-            'label_attr' => array(
+        $html = $this->renderLabel($form->createView(), 'Custom label', [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -275,14 +275,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     // https://github.com/symfony/symfony/issues/5029
     public function testLabelWithCustomTextAsOptionAndCustomAttributesPassedDirectly()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => 'Custom label',
-        ));
-        $html = $this->renderLabel($form->createView(), null, array(
-            'label_attr' => array(
+        ]);
+        $html = $this->renderLabel($form->createView(), null, [
+            'label_attr' => [
                 'class' => 'my&class',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertMatchesXpath($html,
             '/label
@@ -299,7 +299,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
             ->add('myfield', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
         $view = $form->get('myfield')->createView();
-        $html = $this->renderLabel($view, null, array('label_format' => 'form.%name%'));
+        $html = $this->renderLabel($view, null, ['label_format' => 'form.%name%']);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -315,7 +315,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
             ->add('myfield', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
         $view = $form->get('myfield')->createView();
-        $html = $this->renderLabel($view, null, array('label_format' => 'form.%id%'));
+        $html = $this->renderLabel($view, null, ['label_format' => 'form.%id%']);
 
         $this->assertMatchesXpath($html,
 '/label
@@ -327,7 +327,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelFormatAsFormOption()
     {
-        $options = array('label_format' => 'form.%name%');
+        $options = ['label_format' => 'form.%name%'];
 
         $form = $this->factory->createNamedBuilder('myform', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, $options)
             ->add('myfield', 'Symfony\Component\Form\Extension\Core\Type\TextType')
@@ -345,10 +345,10 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelFormatOverriddenOption()
     {
-        $options = array('label_format' => 'form.%name%');
+        $options = ['label_format' => 'form.%name%'];
 
         $form = $this->factory->createNamedBuilder('myform', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, $options)
-            ->add('myfield', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('label_format' => 'field.%name%'))
+            ->add('myfield', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['label_format' => 'field.%name%'])
             ->getForm();
         $view = $form->get('myfield')->createView();
         $html = $this->renderLabel($view);
@@ -363,9 +363,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testLabelWithoutTranslationOnButton()
     {
-        $form = $this->factory->createNamedBuilder('myform', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->createNamedBuilder('myform', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'translation_domain' => false,
-            ))
+            ])
             ->add('mybutton', 'Symfony\Component\Form\Extension\Core\Type\ButtonType')
             ->getForm();
         $view = $form->get('mybutton')->createView();
@@ -386,7 +386,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
             ->add('mybutton', 'Symfony\Component\Form\Extension\Core\Type\ButtonType')
             ->getForm();
         $view = $form->get('mybutton')->createView();
-        $html = $this->renderWidget($view, array('label_format' => 'form.%name%'));
+        $html = $this->renderWidget($view, ['label_format' => 'form.%name%']);
 
         $this->assertMatchesXpath($html,
 '/button
@@ -403,7 +403,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
             ->add('mybutton', 'Symfony\Component\Form\Extension\Core\Type\ButtonType')
             ->getForm();
         $view = $form->get('mybutton')->createView();
-        $html = $this->renderWidget($view, array('label_format' => 'form.%id%'));
+        $html = $this->renderWidget($view, ['label_format' => 'form.%id%']);
 
         $this->assertMatchesXpath($html,
 '/button
@@ -416,9 +416,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testHelp()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-        ));
+        ]);
         $view = $form->createView();
         $html = $this->renderHelp($view);
 
@@ -442,9 +442,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testHelpSetLinkFromWidget()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'help' => 'Help text test!',
-        ));
+        ]);
         $view = $form->createView();
         $html = $this->renderRow($view);
 
@@ -515,7 +515,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="checkbox"]
     [@name="name"]
@@ -529,7 +529,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="checkbox"]
     [@name="name"]
@@ -540,11 +540,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testCheckboxWithValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CheckboxType', false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="checkbox"]
     [@name="name"]
@@ -555,11 +555,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
         // If the field is collapsed, has no "multiple" attribute, is required but
         // has *no* empty value, the "required" must not be added, otherwise
@@ -573,7 +573,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
         //  have a multiple attribute specified, and has a display size of 1,
         //  then the select element must have a placeholder label option."
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -588,14 +588,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSelectWithSizeBiggerThanOneCanBeRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, array(
-            'choices' => array('a', 'b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, [
+            'choices' => ['a', 'b'],
             'multiple' => false,
             'expanded' => false,
-            'attr' => array('size' => 2),
-        ));
+            'attr' => ['size' => 2],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [@required="required"]
@@ -607,14 +607,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -629,16 +629,16 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceWithPlaceholderWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'required' => false,
             'translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -654,14 +654,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -676,14 +676,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/select
     [@name="name"]
     [@class="bar&baz"]
@@ -699,14 +699,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleExpandedChoiceAttributesWithMainAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-            'attr' => array('class' => 'bar&baz'),
-        ));
+            'attr' => ['class' => 'bar&baz'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('attr' => array('class' => 'bar&baz')),
+        $this->assertWidgetMatchesXpath($form->createView(), ['attr' => ['class' => 'bar&baz']],
 '/div
     [@class="bar&baz"]
     [
@@ -723,14 +723,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceWithPreferred()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => '-- sep --'),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => '-- sep --'],
 '/select
     [@name="name"]
     [not(@required)]
@@ -746,14 +746,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceWithPreferredAndNoSeparator()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => null),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => null],
 '/select
     [@name="name"]
     [not(@required)]
@@ -768,14 +768,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceWithPreferredAndBlankSeparator()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array('separator' => ''),
+        $this->assertWidgetMatchesXpath($form->createView(), ['separator' => ''],
 '/select
     [@name="name"]
     [not(@required)]
@@ -791,14 +791,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testChoiceWithOnlyPreferred()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'preferred_choices' => array('&a', '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'preferred_choices' => ['&a', '&b'],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [count(./option)=2]
 '
@@ -807,14 +807,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceNonRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -830,14 +830,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceNonRequiredNoneSelected()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', null, [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -853,15 +853,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceNonRequiredWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => false,
             'required' => false,
             'placeholder' => 'Select&Anything&Not&Me',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -877,18 +877,18 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceRequiredWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => false,
             'expanded' => false,
             'placeholder' => 'Test&Me',
-        ));
+        ]);
 
         // The "disabled" attribute was removed again due to a bug in the
         // BlackBerry 10 browser.
         // See https://github.com/symfony/symfony/pull/7678
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [@required="required"]
@@ -904,17 +904,17 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceRequiredWithPlaceholderViaView()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
         // The "disabled" attribute was removed again due to a bug in the
         // BlackBerry 10 browser.
         // See https://github.com/symfony/symfony/pull/7678
-        $this->assertWidgetMatchesXpath($form->createView(), array('placeholder' => ''),
+        $this->assertWidgetMatchesXpath($form->createView(), ['placeholder' => ''],
 '/select
     [@name="name"]
     [@required="required"]
@@ -930,16 +930,16 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceGrouped()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array(
-                'Group&1' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-                'Group&2' => array('Choice&C' => '&c'),
-            ),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => [
+                'Group&1' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+                'Group&2' => ['Choice&C' => '&c'],
+            ],
             'multiple' => false,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [./optgroup[@label="[trans]Group&1[/trans]"]
@@ -960,14 +960,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => true,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name[]"]
     [@required="required"]
@@ -983,15 +983,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'required' => true,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name[]"]
     [@required="required"]
@@ -1007,14 +1007,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceSkipsPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => true,
             'expanded' => false,
             'placeholder' => 'Test&Me',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name[]"]
     [@multiple="multiple"]
@@ -1029,14 +1029,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceNonRequired()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'required' => false,
             'multiple' => true,
             'expanded' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name[]"]
     [@multiple="multiple"]
@@ -1051,13 +1051,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -1073,15 +1073,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'choice_translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -1097,14 +1097,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@value="&a"][@checked]
@@ -1120,15 +1120,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpandedWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'placeholder' => 'Test&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_placeholder"][not(@checked)]
@@ -1146,16 +1146,16 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpandedWithPlaceholderWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', '&a', [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b'],
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choice_translation_domain' => false,
             'placeholder' => 'Placeholder&Not&Translated',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_placeholder"][not(@checked)]
@@ -1173,13 +1173,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testSingleChoiceExpandedWithBooleanValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', true, array(
-            'choices' => array('Choice&A' => '1', 'Choice&B' => '0'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', true, [
+            'choices' => ['Choice&A' => '1', 'Choice&B' => '0'],
             'multiple' => false,
             'expanded' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="radio"][@name="name"][@id="name_0"][@checked]
@@ -1195,14 +1195,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceExpanded()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@checked][not(@required)]
@@ -1220,15 +1220,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceExpandedWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
             'choice_translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@checked][not(@required)]
@@ -1246,15 +1246,15 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMultipleChoiceExpandedAttributes()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array('&a', '&c'), array(
-            'choices' => array('Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'),
-            'choice_attr' => array('Choice&B' => array('class' => 'foo&bar')),
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', ['&a', '&c'], [
+            'choices' => ['Choice&A' => '&a', 'Choice&B' => '&b', 'Choice&C' => '&c'],
+            'choice_attr' => ['Choice&B' => ['class' => 'foo&bar']],
             'multiple' => true,
             'expanded' => true,
             'required' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input[@type="checkbox"][@name="name[]"][@id="name_0"][@checked][not(@required)]
@@ -1274,7 +1274,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [./option[@value="AT"][@selected="selected"][.="Austria"]]
@@ -1285,12 +1285,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testCountryWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\CountryType', 'AT', [
             'placeholder' => 'Select&Country',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [./option[@value=""][not(@selected)][not(@disabled)][.="[trans]Select&Country[/trans]"]]
@@ -1302,12 +1302,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTime()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', [
             'input' => 'string',
             'with_seconds' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1341,13 +1341,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', null, [
             'input' => 'string',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1381,14 +1381,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithHourAndMinute()
     {
-        $data = array('year' => date('Y'), 'month' => '2', 'day' => '3', 'hour' => '4', 'minute' => '5');
+        $data = ['year' => date('Y'), 'month' => '2', 'day' => '3', 'hour' => '4', 'minute' => '5'];
 
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', $data, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', $data, [
             'input' => 'array',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1422,12 +1422,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithSeconds()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', date('Y').'-02-03 04:05:06', [
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./div
@@ -1464,13 +1464,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'date_widget' => 'single_text',
             'time_widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input
@@ -1490,14 +1490,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithWidgetSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'widget' => 'single_text',
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="datetime-local"]
     [@name="name"]
@@ -1508,16 +1508,16 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithWidgetSingleTextIgnoreDateAndTimeWidgets()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateTimeType', '2011-02-03 04:05:06', [
             'input' => 'string',
             'date_widget' => 'choice',
             'time_widget' => 'choice',
             'widget' => 'single_text',
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="datetime-local"]
     [@name="name"]
@@ -1528,12 +1528,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateChoice()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', date('Y').'-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', date('Y').'-02-03', [
             'input' => 'string',
             'widget' => 'choice',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -1553,14 +1553,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateChoiceWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, [
             'input' => 'string',
             'widget' => 'choice',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -1580,14 +1580,14 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateChoiceWithPlaceholderOnYear()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', null, [
             'input' => 'string',
             'widget' => 'choice',
             'required' => false,
-            'placeholder' => array('year' => 'Change&Me'),
-        ));
+            'placeholder' => ['year' => 'Change&Me'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -1607,12 +1607,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', [
             'input' => 'string',
             'widget' => 'text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input
@@ -1635,12 +1635,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType', '2011-02-03', [
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="date"]
     [@name="name"]
@@ -1663,11 +1663,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testBirthDay()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '2000-02-03', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '2000-02-03', [
             'input' => 'string',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -1687,13 +1687,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testBirthDayWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '1950-01-01', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType', '1950-01-01', [
             'input' => 'string',
             'placeholder' => '',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -1718,7 +1718,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="email"]
     [@name="name"]
@@ -1730,11 +1730,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testEmailWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\EmailType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="email"]
     [@name="name"]
@@ -1748,7 +1748,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\FileType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="file"]
 '
@@ -1759,7 +1759,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\HiddenType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="hidden"]
     [@name="name"]
@@ -1770,11 +1770,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDisabled()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'disabled' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1787,7 +1787,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\IntegerType', 123);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="number"]
     [@name="name"]
@@ -1800,7 +1800,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\LanguageType', 'de');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [./option[@value="de"][@selected="selected"][.="German"]]
@@ -1813,7 +1813,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\LocaleType', 'de_AT');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [./option[@value="de_AT"][@selected="selected"][.="German (Austria)"]]
@@ -1824,11 +1824,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testMoney()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\MoneyType', 1234.56, [
             'currency' => 'EUR',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1842,7 +1842,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\NumberType', 1234.56);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1855,7 +1855,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="password"]
     [@name="name"]
@@ -1865,12 +1865,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testPasswordSubmittedWithNotAlwaysEmpty()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, [
             'always_empty' => false,
-        ));
+        ]);
         $form->submit('foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="password"]
     [@name="name"]
@@ -1881,11 +1881,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testPasswordWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="password"]
     [@name="name"]
@@ -1898,7 +1898,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\PercentType', 0.1);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -1912,7 +1912,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', true);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="radio"]
     [@name="name"]
@@ -1926,7 +1926,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="radio"]
     [@name="name"]
@@ -1937,11 +1937,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testRadioWithValue()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RadioType', false, [
             'value' => 'foo&bar',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="radio"]
     [@name="name"]
@@ -1952,9 +1952,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testRange()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, array('attr' => array('min' => 5)));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, ['attr' => ['min' => 5]]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="range"]
     [@name="name"]
@@ -1966,9 +1966,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testRangeWithMinMaxValues()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, array('attr' => array('min' => 5, 'max' => 57)));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RangeType', 42, ['attr' => ['min' => 5, 'max' => 57]]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="range"]
     [@name="name"]
@@ -1981,11 +1981,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTextarea()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextareaType', 'foo&bar', array(
-            'attr' => array('pattern' => 'foo'),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextareaType', 'foo&bar', [
+            'attr' => ['pattern' => 'foo'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/textarea
     [@name="name"]
     [@pattern="foo"]
@@ -1998,7 +1998,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -2010,11 +2010,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTextWithMaxLength()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar', array(
-            'attr' => array('maxlength' => 123),
-        ));
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'foo&bar', [
+            'attr' => ['maxlength' => 123],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="text"]
     [@name="name"]
@@ -2028,7 +2028,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\SearchType', 'foo&bar');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="search"]
     [@name="name"]
@@ -2040,12 +2040,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTime()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'with_seconds' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -2064,12 +2064,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimeWithSeconds()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -2095,12 +2095,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimeText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'widget' => 'text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./input
@@ -2125,12 +2125,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimeSingleText()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', '04:05:06', [
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="time"]
     [@name="name"]
@@ -2142,13 +2142,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimeWithPlaceholderGlobal()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, [
             'input' => 'string',
             'placeholder' => 'Change&Me',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -2167,13 +2167,13 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimeWithPlaceholderOnYear()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimeType', null, [
             'input' => 'string',
             'required' => false,
-            'placeholder' => array('hour' => 'Change&Me'),
-        ));
+            'placeholder' => ['hour' => 'Change&Me'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/div
     [
         ./select
@@ -2206,7 +2206,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', 'Europe/Vienna');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [@name="name"]
     [not(@required)]
@@ -2222,12 +2222,12 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTimezoneWithPlaceholder()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TimezoneType', null, [
             'placeholder' => 'Select&Timezone',
             'required' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/select
     [./option[@value=""][not(@selected)][not(@disabled)][.="[trans]Select&Timezone[/trans]"]]
     [count(./optgroup)>10]
@@ -2241,7 +2241,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
         $url = 'http://www.google.com?foo1=bar1&foo2=bar2';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\UrlType', $url);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/input
     [@type="url"]
     [@name="name"]
@@ -2252,8 +2252,8 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testCollectionPrototype()
     {
-        $form = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType', array('items' => array('one', 'two', 'three')))
-            ->add('items', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', array('allow_add' => true))
+        $form = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType', ['items' => ['one', 'two', 'three']])
+            ->add('items', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', ['allow_add' => true])
             ->getForm()
             ->createView();
 
@@ -2282,7 +2282,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/button[@type="button"][@name="name"][.="[trans]Name[/trans]"]'
         );
     }
@@ -2296,11 +2296,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testButtonlabelWithoutTranslation()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
             'translation_domain' => false,
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/button[@type="button"][@name="name"][.="Name"]'
         );
     }
@@ -2309,7 +2309,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\SubmitType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/button[@type="submit"][@name="name"]'
         );
     }
@@ -2318,17 +2318,17 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ResetType');
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/button[@type="reset"][@name="name"]'
         );
     }
 
     public function testStartTag()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -2337,10 +2337,10 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testStartTagForPutRequest()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'put',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
         $html = $this->renderStart($form->createView());
 
@@ -2354,25 +2354,25 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testStartTagWithOverriddenVars()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'put',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
+        $html = $this->renderStart($form->createView(), [
             'method' => 'post',
             'action' => 'http://foo.com/directory',
-        ));
+        ]);
 
         $this->assertSame('<form name="form" method="post" action="http://foo.com/directory">', $html);
     }
 
     public function testStartTagForMultipartForm()
     {
-        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'method' => 'get',
                 'action' => 'http://example.com/directory',
-            ))
+            ])
             ->add('file', 'Symfony\Component\Form\Extension\Core\Type\FileType')
             ->getForm();
 
@@ -2383,25 +2383,25 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testStartTagWithExtraAttributes()
     {
-        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $form = $this->factory->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
             'method' => 'get',
             'action' => 'http://example.com/directory',
-        ));
+        ]);
 
-        $html = $this->renderStart($form->createView(), array(
-            'attr' => array('class' => 'foobar'),
-        ));
+        $html = $this->renderStart($form->createView(), [
+            'attr' => ['class' => 'foobar'],
+        ]);
 
         $this->assertSame('<form name="form" method="get" action="http://example.com/directory" class="foobar">', $html);
     }
 
     public function testWidgetAttributes()
     {
-        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', array(
+        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', [
             'required' => true,
             'disabled' => true,
-            'attr' => array('readonly' => true, 'maxlength' => 10, 'pattern' => '\d+', 'class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+            'attr' => ['readonly' => true, 'maxlength' => 10, 'pattern' => '\d+', 'class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2411,9 +2411,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testWidgetAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2423,9 +2423,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testWidgetAttributeHiddenIfFalse()
     {
-        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', array(
-            'attr' => array('foo' => false),
-        ));
+        $form = $this->factory->createNamed('text', 'Symfony\Component\Form\Extension\Core\Type\TextType', 'value', [
+            'attr' => ['foo' => false],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2434,10 +2434,10 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testButtonAttributes()
     {
-        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
+        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
             'disabled' => true,
-            'attr' => array('class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+            'attr' => ['class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2447,9 +2447,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testButtonAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2459,9 +2459,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testButtonAttributeHiddenIfFalse()
     {
-        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, array(
-            'attr' => array('foo' => false),
-        ));
+        $form = $this->factory->createNamed('button', 'Symfony\Component\Form\Extension\Core\Type\ButtonType', null, [
+            'attr' => ['foo' => false],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2479,7 +2479,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testTextareaWithWhitespaceOnlyContentRetainsValueWhenRenderingForm()
     {
-        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', array('textarea' => '  '))
+        $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', ['textarea' => '  '])
             ->add('textarea', 'Symfony\Component\Form\Extension\Core\Type\TextareaType')
             ->getForm();
 
@@ -2490,9 +2490,9 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testWidgetContainerAttributeHiddenIfFalse()
     {
-        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
-            'attr' => array('foo' => false),
-        ));
+        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
+            'attr' => ['foo' => false],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
@@ -2503,8 +2503,8 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
     public function testTranslatedAttributes()
     {
         $view = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType')
-            ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('attr' => array('title' => 'Foo')))
-            ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('attr' => array('placeholder' => 'Bar')))
+            ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['attr' => ['title' => 'Foo']])
+            ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['attr' => ['placeholder' => 'Bar']])
             ->getForm()
             ->createView();
 
@@ -2516,11 +2516,11 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testAttributesNotTranslatedWhenTranslationDomainIsFalse()
     {
-        $view = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+        $view = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'translation_domain' => false,
-            ))
-            ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('attr' => array('title' => 'Foo')))
-            ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('attr' => array('placeholder' => 'Bar')))
+            ])
+            ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['attr' => ['title' => 'Foo']])
+            ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['attr' => ['placeholder' => 'Bar']])
             ->getForm()
             ->createView();
 
@@ -2535,7 +2535,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
         $tel = '0102030405';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TelType', $tel);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/input
     [@type="tel"]
     [@name="name"]
@@ -2549,7 +2549,7 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
         $color = '#0000ff';
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\ColorType', $color);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
             '/input
     [@type="color"]
     [@name="name"]
diff --git a/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php b/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
index 7bc1a65219..2c3de1184b 100644
--- a/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractRequestHandlerTest.php
@@ -38,7 +38,7 @@ abstract class AbstractRequestHandlerTest extends TestCase
 
     protected function setUp()
     {
-        $this->serverParams = $this->getMockBuilder('Symfony\Component\Form\Util\ServerParams')->setMethods(array('getNormalizedIniPostMaxSize', 'getContentLength'))->getMock();
+        $this->serverParams = $this->getMockBuilder('Symfony\Component\Form\Util\ServerParams')->setMethods(['getNormalizedIniPostMaxSize', 'getContentLength'])->getMock();
         $this->requestHandler = $this->getRequestHandler();
         $this->factory = Forms::createFormFactoryBuilder()->getFormFactory();
         $this->request = null;
@@ -46,19 +46,19 @@ abstract class AbstractRequestHandlerTest extends TestCase
 
     public function methodExceptGetProvider()
     {
-        return array(
-            array('POST'),
-            array('PUT'),
-            array('DELETE'),
-            array('PATCH'),
-        );
+        return [
+            ['POST'],
+            ['PUT'],
+            ['DELETE'],
+            ['PATCH'],
+        ];
     }
 
     public function methodProvider()
     {
-        return array_merge(array(
-            array('GET'),
-        ), $this->methodExceptGetProvider());
+        return array_merge([
+            ['GET'],
+        ], $this->methodExceptGetProvider());
     }
 
     /**
@@ -68,9 +68,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
     {
         $form = $this->getMockForm('param1', $method);
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             'param1' => 'DATA',
-        ));
+        ]);
 
         $form->expects($this->once())
             ->method('submit')
@@ -88,9 +88,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
 
         $otherMethod = 'POST' === $method ? 'PUT' : 'POST';
 
-        $this->setRequestData($otherMethod, array(
+        $this->setRequestData($otherMethod, [
             'param1' => 'DATA',
-        ));
+        ]);
 
         $form->expects($this->never())
             ->method('submit');
@@ -105,9 +105,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
     {
         $form = $this->getMockForm('param1', $method, false);
 
-        $this->setRequestData($method, array(
-            'paramx' => array(),
-        ));
+        $this->setRequestData($method, [
+            'paramx' => [],
+        ]);
 
         $form->expects($this->never())
             ->method('submit');
@@ -122,9 +122,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
     {
         $form = $this->getMockForm('param1', $method, true);
 
-        $this->setRequestData($method, array(
-            'paramx' => array(),
-        ));
+        $this->setRequestData($method, [
+            'paramx' => [],
+        ]);
 
         $form->expects($this->never())
             ->method('submit');
@@ -136,9 +136,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
     {
         $form = $this->getMockForm('param1', 'GET');
 
-        $this->setRequestData('GET', array(
-            'paramx' => array(),
-        ));
+        $this->setRequestData('GET', [
+            'paramx' => [],
+        ]);
 
         $form->expects($this->never())
             ->method('submit');
@@ -154,15 +154,15 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('', $method);
         $form->expects($this->any())
             ->method('all')
-            ->will($this->returnValue(array(
+            ->will($this->returnValue([
                 'param1' => $this->getMockForm('param1'),
                 'param2' => $this->getMockForm('param2'),
-            )));
+            ]));
 
-        $this->setRequestData($method, $requestData = array(
+        $this->setRequestData($method, $requestData = [
             'param1' => 'submitted value',
             'paramx' => 'submitted value',
-        ));
+        ]);
 
         $form->expects($this->once())
             ->method('submit')
@@ -179,14 +179,14 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('', $method);
         $form->expects($this->any())
             ->method('all')
-            ->will($this->returnValue(array(
+            ->will($this->returnValue([
                 'param1' => $this->getMockForm('param1'),
                 'param2' => $this->getMockForm('param2'),
-            )));
+            ]));
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             'paramx' => 'submitted value',
-        ));
+        ]);
 
         $form->expects($this->never())
             ->method('submit');
@@ -202,22 +202,22 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('param1', $method);
         $file = $this->getMockFile();
 
-        $this->setRequestData($method, array(
-            'param1' => array(
+        $this->setRequestData($method, [
+            'param1' => [
                 'field1' => 'DATA',
-            ),
-        ), array(
-            'param1' => array(
+            ],
+        ], [
+            'param1' => [
                 'field2' => $file,
-            ),
-        ));
+            ],
+        ]);
 
         $form->expects($this->once())
             ->method('submit')
-            ->with(array(
+            ->with([
                 'field1' => 'DATA',
                 'field2' => $file,
-            ), 'PATCH' !== $method);
+            ], 'PATCH' !== $method);
 
         $this->requestHandler->handleRequest($form, $this->request);
     }
@@ -230,11 +230,11 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('param1', $method);
         $file = $this->getMockFile();
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             'param1' => 'DATA',
-        ), array(
+        ], [
             'param1' => $file,
-        ));
+        ]);
 
         $form->expects($this->once())
             ->method('submit')
@@ -251,11 +251,11 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('param1', $method);
         $file = $this->getMockFile();
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             'param1' => null,
-        ), array(
+        ], [
             'param1' => $file,
-        ));
+        ]);
 
         $form->expects($this->once())
             ->method('submit')
@@ -272,13 +272,13 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm('param1', $method);
         $file = $this->getMockFile();
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             'param1' => null,
-        ), array(
+        ], [
             'param2' => $this->getMockFile('2'),
             'param1' => $file,
             'param3' => $this->getMockFile('3'),
-        ));
+        ]);
 
         $form->expects($this->once())
              ->method('submit')
@@ -295,11 +295,11 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $form = $this->getMockForm(null, $method);
         $file = $this->getMockFile();
 
-        $this->setRequestData($method, array(
+        $this->setRequestData($method, [
             '' => null,
-        ), array(
+        ], [
             '' => $file,
-        ));
+        ]);
 
         $form->expects($this->once())
              ->method('submit')
@@ -311,7 +311,7 @@ abstract class AbstractRequestHandlerTest extends TestCase
     /**
      * @dataProvider getPostMaxSizeFixtures
      */
-    public function testAddFormErrorIfPostMaxSizeExceeded($contentLength, $iniMax, $shouldFail, array $errorParams = array())
+    public function testAddFormErrorIfPostMaxSizeExceeded($contentLength, $iniMax, $shouldFail, array $errorParams = [])
     {
         $this->serverParams->expects($this->once())
             ->method('getContentLength')
@@ -320,9 +320,9 @@ abstract class AbstractRequestHandlerTest extends TestCase
             ->method('getNormalizedIniPostMaxSize')
             ->will($this->returnValue($iniMax));
 
-        $options = array('post_max_size_message' => 'Max {{ max }}!');
+        $options = ['post_max_size_message' => 'Max {{ max }}!'];
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, $options);
-        $this->setRequestData('POST', array(), array());
+        $this->setRequestData('POST', [], []);
 
         $this->requestHandler->handleRequest($form, $this->request);
 
@@ -330,7 +330,7 @@ abstract class AbstractRequestHandlerTest extends TestCase
             $error = new FormError($options['post_max_size_message'], null, $errorParams);
             $error->setOrigin($form);
 
-            $this->assertEquals(array($error), iterator_to_array($form->getErrors()));
+            $this->assertEquals([$error], iterator_to_array($form->getErrors()));
             $this->assertTrue($form->isSubmitted());
         } else {
             $this->assertCount(0, $form->getErrors());
@@ -340,17 +340,17 @@ abstract class AbstractRequestHandlerTest extends TestCase
 
     public function getPostMaxSizeFixtures()
     {
-        return array(
-            array(pow(1024, 3) + 1, '1G', true, array('{{ max }}' => '1G')),
-            array(pow(1024, 3), '1G', false),
-            array(pow(1024, 2) + 1, '1M', true, array('{{ max }}' => '1M')),
-            array(pow(1024, 2), '1M', false),
-            array(1024 + 1, '1K', true, array('{{ max }}' => '1K')),
-            array(1024, '1K', false),
-            array(null, '1K', false),
-            array(1024, '', false),
-            array(1024, 0, false),
-        );
+        return [
+            [pow(1024, 3) + 1, '1G', true, ['{{ max }}' => '1G']],
+            [pow(1024, 3), '1G', false],
+            [pow(1024, 2) + 1, '1M', true, ['{{ max }}' => '1M']],
+            [pow(1024, 2), '1M', false],
+            [1024 + 1, '1K', true, ['{{ max }}' => '1K']],
+            [1024, '1K', false],
+            [null, '1K', false],
+            [1024, '', false],
+            [1024, 0, false],
+        ];
     }
 
     public function testUploadedFilesAreAccepted()
@@ -363,7 +363,7 @@ abstract class AbstractRequestHandlerTest extends TestCase
         $this->assertFalse($this->requestHandler->isFileUpload($this->getInvalidFile()));
     }
 
-    abstract protected function setRequestData($method, $data, $files = array());
+    abstract protected function setRequestData($method, $data, $files = []);
 
     abstract protected function getRequestHandler();
 
diff --git a/src/Symfony/Component/Form/Tests/AbstractTableLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractTableLayoutTest.php
index 9902a6dc08..1873a58f0d 100644
--- a/src/Symfony/Component/Form/Tests/AbstractTableLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractTableLayoutTest.php
@@ -42,9 +42,9 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testLabelIsNotRenderedWhenSetToFalse()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
             'label' => false,
-        ));
+        ]);
         $html = $this->renderRow($form->createView());
 
         $this->assertMatchesXpath($html,
@@ -194,11 +194,11 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testCollection()
     {
-        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', array('a', 'b'), array(
+        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', ['a', 'b'], [
             'entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr[./td/input[@type="text"][@value="a"]]
@@ -212,11 +212,11 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testEmptyCollection()
     {
-        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', array(), array(
+        $form = $this->factory->createNamed('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', [], [
             'entry_type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [./tr[@style="display: none"][./td[@colspan="2"]/input[@type="hidden"][@id="names__token"]]]
     [count(./tr[./td/input])=1]
@@ -234,10 +234,10 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
             ->getForm()
             ->createView();
 
-        $html = $this->renderForm($view, array(
+        $html = $this->renderForm($view, [
             'id' => 'my&id',
-            'attr' => array('class' => 'my&class'),
-        ));
+            'attr' => ['class' => 'my&class'],
+        ]);
 
         $this->assertMatchesXpath($html,
 '/form
@@ -284,7 +284,7 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
             ->getForm()
             ->createView();
 
-        $this->assertWidgetMatchesXpath($view, array(),
+        $this->assertWidgetMatchesXpath($view, [],
 '/table
     [
         ./tr
@@ -317,14 +317,14 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
     {
         $form = $this->factory->createNamedBuilder('name', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             ->add($this->factory
-                ->createNamedBuilder('child', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array('error_bubbling' => false))
+                ->createNamedBuilder('child', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, ['error_bubbling' => false])
                 ->add('grandChild', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             )
             ->getForm();
 
         $form->get('child')->addError(new FormError('[trans]Error![/trans]'));
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr/td/ul[./li[.="[trans]Error![/trans]"]]
@@ -349,7 +349,7 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
             )
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr[@style="display: none"]
@@ -365,11 +365,11 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testRepeated()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', [
             'type' => 'Symfony\Component\Form\Extension\Core\Type\TextType',
-        ));
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr
@@ -399,13 +399,13 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testRepeatedWithCustomOptions()
     {
-        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', array(
+        $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\RepeatedType', 'foobar', [
             'type' => 'Symfony\Component\Form\Extension\Core\Type\PasswordType',
-            'first_options' => array('label' => 'Test', 'required' => false),
-            'second_options' => array('label' => 'Test2'),
-        ));
+            'first_options' => ['label' => 'Test', 'required' => false],
+            'second_options' => ['label' => 'Test2'],
+        ]);
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr
@@ -439,11 +439,11 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
      */
     public function testCollectionRowWithCustomBlock()
     {
-        $collection = array('one', 'two', 'three');
+        $collection = ['one', 'two', 'three'];
         $form = $this->factory->createNamedBuilder('names', 'Symfony\Component\Form\Extension\Core\Type\CollectionType', $collection)
             ->getForm();
 
-        $this->assertWidgetMatchesXpath($form->createView(), array(),
+        $this->assertWidgetMatchesXpath($form->createView(), [],
 '/table
     [
         ./tr[./td/label[.="Custom label: [trans]0[/trans]"]]
@@ -503,16 +503,16 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
         $this->renderWidget($view['field1']);
 
         // Rest should only contain field2, but isn't rendered
-        $html = $this->renderEnd($view, array('render_rest' => false));
+        $html = $this->renderEnd($view, ['render_rest' => false]);
 
         $this->assertEquals('</form>', $html);
     }
 
     public function testWidgetContainerAttributes()
     {
-        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
-            'attr' => array('class' => 'foobar', 'data-foo' => 'bar'),
-        ));
+        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
+            'attr' => ['class' => 'foobar', 'data-foo' => 'bar'],
+        ]);
 
         $form->add('text', 'Symfony\Component\Form\Extension\Core\Type\TextType');
 
@@ -524,9 +524,9 @@ abstract class AbstractTableLayoutTest extends AbstractLayoutTest
 
     public function testWidgetContainerAttributeNameRepeatedIfTrue()
     {
-        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
-            'attr' => array('foo' => true),
-        ));
+        $form = $this->factory->createNamed('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
+            'attr' => ['foo' => true],
+        ]);
 
         $html = $this->renderWidget($form->createView());
 
diff --git a/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php b/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
index 014a5ae179..ced54a4588 100644
--- a/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
+++ b/src/Symfony/Component/Form/Tests/ButtonBuilderTest.php
@@ -22,14 +22,14 @@ class ButtonBuilderTest extends TestCase
 {
     public function getValidNames()
     {
-        return array(
-            array('reset'),
-            array('submit'),
-            array('foo'),
-            array('0'),
-            array(0),
-            array('button[]'),
-        );
+        return [
+            ['reset'],
+            ['submit'],
+            ['foo'],
+            ['0'],
+            [0],
+            ['button[]'],
+        ];
     }
 
     /**
@@ -42,11 +42,11 @@ class ButtonBuilderTest extends TestCase
 
     public function getInvalidNames()
     {
-        return array(
-            array(''),
-            array(false),
-            array(null),
-        );
+        return [
+            [''],
+            [false],
+            [null],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/ButtonTest.php b/src/Symfony/Component/Form/Tests/ButtonTest.php
index a81c2db551..6115640242 100644
--- a/src/Symfony/Component/Form/Tests/ButtonTest.php
+++ b/src/Symfony/Component/Form/Tests/ButtonTest.php
@@ -66,13 +66,13 @@ class ButtonTest extends TestCase
 
     public function getDisabledStates()
     {
-        return array(
+        return [
             // parent, button, result
-            array(true, true, true),
-            array(true, false, true),
-            array(false, true, true),
-            array(false, false, false),
-        );
+            [true, true, true],
+            [true, false, true],
+            [false, true, true],
+            [false, false, false],
+        ];
     }
 
     private function getButtonBuilder($name)
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
index fc25cffc1f..aca967daba 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/AbstractChoiceListTest.php
@@ -154,66 +154,66 @@ abstract class AbstractChoiceListTest extends TestCase
 
     public function testGetChoicesForValues()
     {
-        $values = array($this->value1, $this->value2);
-        $this->assertSame(array($this->choice1, $this->choice2), $this->list->getChoicesForValues($values));
+        $values = [$this->value1, $this->value2];
+        $this->assertSame([$this->choice1, $this->choice2], $this->list->getChoicesForValues($values));
     }
 
     public function testGetChoicesForValuesPreservesKeys()
     {
-        $values = array(5 => $this->value1, 8 => $this->value2);
-        $this->assertSame(array(5 => $this->choice1, 8 => $this->choice2), $this->list->getChoicesForValues($values));
+        $values = [5 => $this->value1, 8 => $this->value2];
+        $this->assertSame([5 => $this->choice1, 8 => $this->choice2], $this->list->getChoicesForValues($values));
     }
 
     public function testGetChoicesForValuesPreservesOrder()
     {
-        $values = array($this->value2, $this->value1);
-        $this->assertSame(array($this->choice2, $this->choice1), $this->list->getChoicesForValues($values));
+        $values = [$this->value2, $this->value1];
+        $this->assertSame([$this->choice2, $this->choice1], $this->list->getChoicesForValues($values));
     }
 
     public function testGetChoicesForValuesIgnoresNonExistingValues()
     {
-        $values = array($this->value1, $this->value2, 'foobar');
-        $this->assertSame(array($this->choice1, $this->choice2), $this->list->getChoicesForValues($values));
+        $values = [$this->value1, $this->value2, 'foobar'];
+        $this->assertSame([$this->choice1, $this->choice2], $this->list->getChoicesForValues($values));
     }
 
     // https://github.com/symfony/symfony/issues/3446
     public function testGetChoicesForValuesEmpty()
     {
-        $this->assertSame(array(), $this->list->getChoicesForValues(array()));
+        $this->assertSame([], $this->list->getChoicesForValues([]));
     }
 
     public function testGetValuesForChoices()
     {
-        $choices = array($this->choice1, $this->choice2);
-        $this->assertSame(array($this->value1, $this->value2), $this->list->getValuesForChoices($choices));
+        $choices = [$this->choice1, $this->choice2];
+        $this->assertSame([$this->value1, $this->value2], $this->list->getValuesForChoices($choices));
     }
 
     public function testGetValuesForChoicesPreservesKeys()
     {
-        $choices = array(5 => $this->choice1, 8 => $this->choice2);
-        $this->assertSame(array(5 => $this->value1, 8 => $this->value2), $this->list->getValuesForChoices($choices));
+        $choices = [5 => $this->choice1, 8 => $this->choice2];
+        $this->assertSame([5 => $this->value1, 8 => $this->value2], $this->list->getValuesForChoices($choices));
     }
 
     public function testGetValuesForChoicesPreservesOrder()
     {
-        $choices = array($this->choice2, $this->choice1);
-        $this->assertSame(array($this->value2, $this->value1), $this->list->getValuesForChoices($choices));
+        $choices = [$this->choice2, $this->choice1];
+        $this->assertSame([$this->value2, $this->value1], $this->list->getValuesForChoices($choices));
     }
 
     public function testGetValuesForChoicesIgnoresNonExistingChoices()
     {
-        $choices = array($this->choice1, $this->choice2, 'foobar');
-        $this->assertSame(array($this->value1, $this->value2), $this->list->getValuesForChoices($choices));
+        $choices = [$this->choice1, $this->choice2, 'foobar'];
+        $this->assertSame([$this->value1, $this->value2], $this->list->getValuesForChoices($choices));
     }
 
     public function testGetValuesForChoicesEmpty()
     {
-        $this->assertSame(array(), $this->list->getValuesForChoices(array()));
+        $this->assertSame([], $this->list->getValuesForChoices([]));
     }
 
     public function testGetChoicesForValuesWithNull()
     {
-        $values = $this->list->getValuesForChoices(array(null));
+        $values = $this->list->getValuesForChoices([null]);
 
         $this->assertNotEmpty($this->list->getChoicesForValues($values));
     }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/ArrayChoiceListTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/ArrayChoiceListTest.php
index 37b8dddbbe..c71fd75bcf 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/ArrayChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/ArrayChoiceListTest.php
@@ -34,12 +34,12 @@ class ArrayChoiceListTest extends AbstractChoiceListTest
 
     protected function getChoices()
     {
-        return array(0, 1, 1.5, '1', 'a', false, true, $this->object, null);
+        return [0, 1, 1.5, '1', 'a', false, true, $this->object, null];
     }
 
     protected function getValues()
     {
-        return array('0', '1', '2', '3', '4', '5', '6', '7', '8');
+        return ['0', '1', '2', '3', '4', '5', '6', '7', '8'];
     }
 
     public function testCreateChoiceListWithValueCallback()
@@ -48,65 +48,65 @@ class ArrayChoiceListTest extends AbstractChoiceListTest
             return ':'.$choice;
         };
 
-        $choiceList = new ArrayChoiceList(array(2 => 'foo', 7 => 'bar', 10 => 'baz'), $callback);
+        $choiceList = new ArrayChoiceList([2 => 'foo', 7 => 'bar', 10 => 'baz'], $callback);
 
-        $this->assertSame(array(':foo', ':bar', ':baz'), $choiceList->getValues());
-        $this->assertSame(array(':foo' => 'foo', ':bar' => 'bar', ':baz' => 'baz'), $choiceList->getChoices());
-        $this->assertSame(array(':foo' => 2, ':bar' => 7, ':baz' => 10), $choiceList->getOriginalKeys());
-        $this->assertSame(array(1 => 'foo', 2 => 'baz'), $choiceList->getChoicesForValues(array(1 => ':foo', 2 => ':baz')));
-        $this->assertSame(array(1 => ':foo', 2 => ':baz'), $choiceList->getValuesForChoices(array(1 => 'foo', 2 => 'baz')));
+        $this->assertSame([':foo', ':bar', ':baz'], $choiceList->getValues());
+        $this->assertSame([':foo' => 'foo', ':bar' => 'bar', ':baz' => 'baz'], $choiceList->getChoices());
+        $this->assertSame([':foo' => 2, ':bar' => 7, ':baz' => 10], $choiceList->getOriginalKeys());
+        $this->assertSame([1 => 'foo', 2 => 'baz'], $choiceList->getChoicesForValues([1 => ':foo', 2 => ':baz']));
+        $this->assertSame([1 => ':foo', 2 => ':baz'], $choiceList->getValuesForChoices([1 => 'foo', 2 => 'baz']));
     }
 
     public function testCreateChoiceListWithoutValueCallbackAndDuplicateFreeToStringChoices()
     {
-        $choiceList = new ArrayChoiceList(array(2 => 'foo', 7 => 'bar', 10 => 123));
+        $choiceList = new ArrayChoiceList([2 => 'foo', 7 => 'bar', 10 => 123]);
 
-        $this->assertSame(array('foo', 'bar', '123'), $choiceList->getValues());
-        $this->assertSame(array('foo' => 'foo', 'bar' => 'bar', '123' => 123), $choiceList->getChoices());
-        $this->assertSame(array('foo' => 2, 'bar' => 7, '123' => 10), $choiceList->getOriginalKeys());
-        $this->assertSame(array(1 => 'foo', 2 => 123), $choiceList->getChoicesForValues(array(1 => 'foo', 2 => '123')));
-        $this->assertSame(array(1 => 'foo', 2 => '123'), $choiceList->getValuesForChoices(array(1 => 'foo', 2 => 123)));
+        $this->assertSame(['foo', 'bar', '123'], $choiceList->getValues());
+        $this->assertSame(['foo' => 'foo', 'bar' => 'bar', '123' => 123], $choiceList->getChoices());
+        $this->assertSame(['foo' => 2, 'bar' => 7, '123' => 10], $choiceList->getOriginalKeys());
+        $this->assertSame([1 => 'foo', 2 => 123], $choiceList->getChoicesForValues([1 => 'foo', 2 => '123']));
+        $this->assertSame([1 => 'foo', 2 => '123'], $choiceList->getValuesForChoices([1 => 'foo', 2 => 123]));
     }
 
     public function testCreateChoiceListWithoutValueCallbackAndToStringDuplicates()
     {
-        $choiceList = new ArrayChoiceList(array(2 => 'foo', 7 => '123', 10 => 123));
+        $choiceList = new ArrayChoiceList([2 => 'foo', 7 => '123', 10 => 123]);
 
-        $this->assertSame(array('0', '1', '2'), $choiceList->getValues());
-        $this->assertSame(array('0' => 'foo', '1' => '123', '2' => 123), $choiceList->getChoices());
-        $this->assertSame(array('0' => 2, '1' => 7, '2' => 10), $choiceList->getOriginalKeys());
-        $this->assertSame(array(1 => 'foo', 2 => 123), $choiceList->getChoicesForValues(array(1 => '0', 2 => '2')));
-        $this->assertSame(array(1 => '0', 2 => '2'), $choiceList->getValuesForChoices(array(1 => 'foo', 2 => 123)));
+        $this->assertSame(['0', '1', '2'], $choiceList->getValues());
+        $this->assertSame(['0' => 'foo', '1' => '123', '2' => 123], $choiceList->getChoices());
+        $this->assertSame(['0' => 2, '1' => 7, '2' => 10], $choiceList->getOriginalKeys());
+        $this->assertSame([1 => 'foo', 2 => 123], $choiceList->getChoicesForValues([1 => '0', 2 => '2']));
+        $this->assertSame([1 => '0', 2 => '2'], $choiceList->getValuesForChoices([1 => 'foo', 2 => 123]));
     }
 
     public function testCreateChoiceListWithoutValueCallbackAndMixedChoices()
     {
         $object = new \stdClass();
-        $choiceList = new ArrayChoiceList(array(2 => 'foo', 5 => array(7 => '123'), 10 => $object));
+        $choiceList = new ArrayChoiceList([2 => 'foo', 5 => [7 => '123'], 10 => $object]);
 
-        $this->assertSame(array('0', '1', '2'), $choiceList->getValues());
-        $this->assertSame(array('0' => 'foo', '1' => '123', '2' => $object), $choiceList->getChoices());
-        $this->assertSame(array('0' => 2, '1' => 7, '2' => 10), $choiceList->getOriginalKeys());
-        $this->assertSame(array(1 => 'foo', 2 => $object), $choiceList->getChoicesForValues(array(1 => '0', 2 => '2')));
-        $this->assertSame(array(1 => '0', 2 => '2'), $choiceList->getValuesForChoices(array(1 => 'foo', 2 => $object)));
+        $this->assertSame(['0', '1', '2'], $choiceList->getValues());
+        $this->assertSame(['0' => 'foo', '1' => '123', '2' => $object], $choiceList->getChoices());
+        $this->assertSame(['0' => 2, '1' => 7, '2' => 10], $choiceList->getOriginalKeys());
+        $this->assertSame([1 => 'foo', 2 => $object], $choiceList->getChoicesForValues([1 => '0', 2 => '2']));
+        $this->assertSame([1 => '0', 2 => '2'], $choiceList->getValuesForChoices([1 => 'foo', 2 => $object]));
     }
 
     public function testCreateChoiceListWithGroupedChoices()
     {
-        $choiceList = new ArrayChoiceList(array(
-            'Group 1' => array('A' => 'a', 'B' => 'b'),
-            'Group 2' => array('C' => 'c', 'D' => 'd'),
-        ));
+        $choiceList = new ArrayChoiceList([
+            'Group 1' => ['A' => 'a', 'B' => 'b'],
+            'Group 2' => ['C' => 'c', 'D' => 'd'],
+        ]);
 
-        $this->assertSame(array('a', 'b', 'c', 'd'), $choiceList->getValues());
-        $this->assertSame(array(
-            'Group 1' => array('A' => 'a', 'B' => 'b'),
-            'Group 2' => array('C' => 'c', 'D' => 'd'),
-        ), $choiceList->getStructuredValues());
-        $this->assertSame(array('a' => 'a', 'b' => 'b', 'c' => 'c', 'd' => 'd'), $choiceList->getChoices());
-        $this->assertSame(array('a' => 'A', 'b' => 'B', 'c' => 'C', 'd' => 'D'), $choiceList->getOriginalKeys());
-        $this->assertSame(array(1 => 'a', 2 => 'b'), $choiceList->getChoicesForValues(array(1 => 'a', 2 => 'b')));
-        $this->assertSame(array(1 => 'a', 2 => 'b'), $choiceList->getValuesForChoices(array(1 => 'a', 2 => 'b')));
+        $this->assertSame(['a', 'b', 'c', 'd'], $choiceList->getValues());
+        $this->assertSame([
+            'Group 1' => ['A' => 'a', 'B' => 'b'],
+            'Group 2' => ['C' => 'c', 'D' => 'd'],
+        ], $choiceList->getStructuredValues());
+        $this->assertSame(['a' => 'a', 'b' => 'b', 'c' => 'c', 'd' => 'd'], $choiceList->getChoices());
+        $this->assertSame(['a' => 'A', 'b' => 'B', 'c' => 'C', 'd' => 'D'], $choiceList->getOriginalKeys());
+        $this->assertSame([1 => 'a', 2 => 'b'], $choiceList->getChoicesForValues([1 => 'a', 2 => 'b']));
+        $this->assertSame([1 => 'a', 2 => 'b'], $choiceList->getValuesForChoices([1 => 'a', 2 => 'b']));
     }
 
     public function testCompareChoicesByIdentityByDefault()
@@ -115,52 +115,52 @@ class ArrayChoiceListTest extends AbstractChoiceListTest
             return $choice->value;
         };
 
-        $obj1 = (object) array('value' => 'value1');
-        $obj2 = (object) array('value' => 'value2');
+        $obj1 = (object) ['value' => 'value1'];
+        $obj2 = (object) ['value' => 'value2'];
 
-        $choiceList = new ArrayChoiceList(array($obj1, $obj2), $callback);
-        $this->assertSame(array(2 => 'value2'), $choiceList->getValuesForChoices(array(2 => $obj2)));
-        $this->assertSame(array(2 => 'value2'), $choiceList->getValuesForChoices(array(2 => (object) array('value' => 'value2'))));
+        $choiceList = new ArrayChoiceList([$obj1, $obj2], $callback);
+        $this->assertSame([2 => 'value2'], $choiceList->getValuesForChoices([2 => $obj2]));
+        $this->assertSame([2 => 'value2'], $choiceList->getValuesForChoices([2 => (object) ['value' => 'value2']]));
     }
 
     public function testGetChoicesForValuesWithContainingNull()
     {
-        $choiceList = new ArrayChoiceList(array('Null' => null));
+        $choiceList = new ArrayChoiceList(['Null' => null]);
 
-        $this->assertSame(array(0 => null), $choiceList->getChoicesForValues(array('0')));
+        $this->assertSame([0 => null], $choiceList->getChoicesForValues(['0']));
     }
 
     public function testGetChoicesForValuesWithContainingFalseAndNull()
     {
-        $choiceList = new ArrayChoiceList(array('False' => false, 'Null' => null));
+        $choiceList = new ArrayChoiceList(['False' => false, 'Null' => null]);
 
-        $this->assertSame(array(0 => null), $choiceList->getChoicesForValues(array('1')));
-        $this->assertSame(array(0 => false), $choiceList->getChoicesForValues(array('0')));
+        $this->assertSame([0 => null], $choiceList->getChoicesForValues(['1']));
+        $this->assertSame([0 => false], $choiceList->getChoicesForValues(['0']));
     }
 
     public function testGetChoicesForValuesWithContainingEmptyStringAndNull()
     {
-        $choiceList = new ArrayChoiceList(array('Empty String' => '', 'Null' => null));
+        $choiceList = new ArrayChoiceList(['Empty String' => '', 'Null' => null]);
 
-        $this->assertSame(array(0 => ''), $choiceList->getChoicesForValues(array('0')));
-        $this->assertSame(array(0 => null), $choiceList->getChoicesForValues(array('1')));
+        $this->assertSame([0 => ''], $choiceList->getChoicesForValues(['0']));
+        $this->assertSame([0 => null], $choiceList->getChoicesForValues(['1']));
     }
 
     public function testGetChoicesForValuesWithContainingEmptyStringAndBooleans()
     {
-        $choiceList = new ArrayChoiceList(array('Empty String' => '', 'True' => true, 'False' => false));
+        $choiceList = new ArrayChoiceList(['Empty String' => '', 'True' => true, 'False' => false]);
 
-        $this->assertSame(array(0 => ''), $choiceList->getChoicesForValues(array('')));
-        $this->assertSame(array(0 => true), $choiceList->getChoicesForValues(array('1')));
-        $this->assertSame(array(0 => false), $choiceList->getChoicesForValues(array('0')));
+        $this->assertSame([0 => ''], $choiceList->getChoicesForValues(['']));
+        $this->assertSame([0 => true], $choiceList->getChoicesForValues(['1']));
+        $this->assertSame([0 => false], $choiceList->getChoicesForValues(['0']));
     }
 
     public function testGetChoicesForValuesWithContainingEmptyStringAndFloats()
     {
-        $choiceList = new ArrayChoiceList(array('Empty String' => '', '1/3' => 0.3, '1/2' => 0.5));
+        $choiceList = new ArrayChoiceList(['Empty String' => '', '1/3' => 0.3, '1/2' => 0.5]);
 
-        $this->assertSame(array(0 => ''), $choiceList->getChoicesForValues(array('')));
-        $this->assertSame(array(0 => 0.3), $choiceList->getChoicesForValues(array('0.3')));
-        $this->assertSame(array(0 => 0.5), $choiceList->getChoicesForValues(array('0.5')));
+        $this->assertSame([0 => ''], $choiceList->getChoicesForValues(['']));
+        $this->assertSame([0 => 0.3], $choiceList->getChoicesForValues(['0.3']));
+        $this->assertSame([0 => 0.5], $choiceList->getChoicesForValues(['0.5']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
index c0d34c1bfd..ca5b67c817 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
@@ -41,18 +41,18 @@ class CachingFactoryDecoratorTest extends TestCase
 
         $this->decoratedFactory->expects($this->once())
             ->method('createListFromChoices')
-            ->with(array())
+            ->with([])
             ->will($this->returnValue($list));
 
-        $this->assertSame($list, $this->factory->createListFromChoices(array()));
-        $this->assertSame($list, $this->factory->createListFromChoices(array()));
+        $this->assertSame($list, $this->factory->createListFromChoices([]));
+        $this->assertSame($list, $this->factory->createListFromChoices([]));
     }
 
     public function testCreateFromChoicesComparesTraversableChoicesAsArray()
     {
         // The top-most traversable is converted to an array
-        $choices1 = new \ArrayIterator(array('A' => 'a'));
-        $choices2 = array('A' => 'a');
+        $choices1 = new \ArrayIterator(['A' => 'a']);
+        $choices2 = ['A' => 'a'];
         $list = new \stdClass();
 
         $this->decoratedFactory->expects($this->once())
@@ -66,8 +66,8 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateFromChoicesGroupedChoices()
     {
-        $choices1 = array('key' => array('A' => 'a'));
-        $choices2 = array('A' => 'a');
+        $choices1 = ['key' => ['A' => 'a']];
+        $choices2 = ['A' => 'a'];
         $list1 = new \stdClass();
         $list2 = new \stdClass();
 
@@ -89,8 +89,8 @@ class CachingFactoryDecoratorTest extends TestCase
      */
     public function testCreateFromChoicesSameChoices($choice1, $choice2)
     {
-        $choices1 = array($choice1);
-        $choices2 = array($choice2);
+        $choices1 = [$choice1];
+        $choices2 = [$choice2];
         $list = new \stdClass();
 
         $this->decoratedFactory->expects($this->once())
@@ -107,8 +107,8 @@ class CachingFactoryDecoratorTest extends TestCase
      */
     public function testCreateFromChoicesDifferentChoices($choice1, $choice2)
     {
-        $choices1 = array($choice1);
-        $choices2 = array($choice2);
+        $choices1 = [$choice1];
+        $choices2 = [$choice2];
         $list1 = new \stdClass();
         $list2 = new \stdClass();
 
@@ -127,7 +127,7 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateFromChoicesSameValueClosure()
     {
-        $choices = array(1);
+        $choices = [1];
         $list = new \stdClass();
         $closure = function () {};
 
@@ -142,7 +142,7 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateFromChoicesDifferentValueClosure()
     {
-        $choices = array(1);
+        $choices = [1];
         $list1 = new \stdClass();
         $list2 = new \stdClass();
         $closure1 = function () {};
@@ -233,7 +233,7 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateViewSamePreferredChoices()
     {
-        $preferred = array('a');
+        $preferred = ['a'];
         $list = $this->getMockBuilder('Symfony\Component\Form\ChoiceList\ChoiceListInterface')->getMock();
         $view = new \stdClass();
 
@@ -248,8 +248,8 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateViewDifferentPreferredChoices()
     {
-        $preferred1 = array('a');
-        $preferred2 = array('b');
+        $preferred1 = ['a'];
+        $preferred2 = ['b'];
         $list = $this->getMockBuilder('Symfony\Component\Form\ChoiceList\ChoiceListInterface')->getMock();
         $view1 = new \stdClass();
         $view2 = new \stdClass();
@@ -413,7 +413,7 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateViewSameAttributes()
     {
-        $attr = array('class' => 'foobar');
+        $attr = ['class' => 'foobar'];
         $list = $this->getMockBuilder('Symfony\Component\Form\ChoiceList\ChoiceListInterface')->getMock();
         $view = new \stdClass();
 
@@ -428,8 +428,8 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function testCreateViewDifferentAttributes()
     {
-        $attr1 = array('class' => 'foobar1');
-        $attr2 = array('class' => 'foobar2');
+        $attr1 = ['class' => 'foobar1'];
+        $attr2 = ['class' => 'foobar2'];
         $list = $this->getMockBuilder('Symfony\Component\Form\ChoiceList\ChoiceListInterface')->getMock();
         $view1 = new \stdClass();
         $view2 = new \stdClass();
@@ -485,53 +485,53 @@ class CachingFactoryDecoratorTest extends TestCase
 
     public function provideSameChoices()
     {
-        $object = (object) array('foo' => 'bar');
+        $object = (object) ['foo' => 'bar'];
 
-        return array(
-            array(0, 0),
-            array('a', 'a'),
+        return [
+            [0, 0],
+            ['a', 'a'],
             // https://github.com/symfony/symfony/issues/10409
-            array(\chr(181).'meter', \chr(181).'meter'), // UTF-8
-            array($object, $object),
-        );
+            [\chr(181).'meter', \chr(181).'meter'], // UTF-8
+            [$object, $object],
+        ];
     }
 
     public function provideDistinguishedChoices()
     {
-        return array(
-            array(0, false),
-            array(0, null),
-            array(0, '0'),
-            array(0, ''),
-            array(1, true),
-            array(1, '1'),
-            array(1, 'a'),
-            array('', false),
-            array('', null),
-            array(false, null),
+        return [
+            [0, false],
+            [0, null],
+            [0, '0'],
+            [0, ''],
+            [1, true],
+            [1, '1'],
+            [1, 'a'],
+            ['', false],
+            ['', null],
+            [false, null],
             // Same properties, but not identical
-            array((object) array('foo' => 'bar'), (object) array('foo' => 'bar')),
-        );
+            [(object) ['foo' => 'bar'], (object) ['foo' => 'bar']],
+        ];
     }
 
     public function provideSameKeyChoices()
     {
         // Only test types here that can be used as array keys
-        return array(
-            array(0, 0),
-            array(0, '0'),
-            array('a', 'a'),
-            array(\chr(181).'meter', \chr(181).'meter'),
-        );
+        return [
+            [0, 0],
+            [0, '0'],
+            ['a', 'a'],
+            [\chr(181).'meter', \chr(181).'meter'],
+        ];
     }
 
     public function provideDistinguishedKeyChoices()
     {
         // Only test types here that can be used as array keys
-        return array(
-            array(0, ''),
-            array(1, 'a'),
-            array('', 'a'),
-        );
+        return [
+            [0, ''],
+            [1, 'a'],
+            ['', 'a'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
index 983fdd2728..c520ab1a0d 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/DefaultChoiceListFactoryTest.php
@@ -86,28 +86,28 @@ class DefaultChoiceListFactoryTest extends TestCase
 
     protected function setUp()
     {
-        $this->obj1 = (object) array('label' => 'A', 'index' => 'w', 'value' => 'a', 'preferred' => false, 'group' => 'Group 1', 'attr' => array());
-        $this->obj2 = (object) array('label' => 'B', 'index' => 'x', 'value' => 'b', 'preferred' => true, 'group' => 'Group 1', 'attr' => array('attr1' => 'value1'));
-        $this->obj3 = (object) array('label' => 'C', 'index' => 'y', 'value' => 1, 'preferred' => true, 'group' => 'Group 2', 'attr' => array('attr2' => 'value2'));
-        $this->obj4 = (object) array('label' => 'D', 'index' => 'z', 'value' => 2, 'preferred' => false, 'group' => 'Group 2', 'attr' => array());
+        $this->obj1 = (object) ['label' => 'A', 'index' => 'w', 'value' => 'a', 'preferred' => false, 'group' => 'Group 1', 'attr' => []];
+        $this->obj2 = (object) ['label' => 'B', 'index' => 'x', 'value' => 'b', 'preferred' => true, 'group' => 'Group 1', 'attr' => ['attr1' => 'value1']];
+        $this->obj3 = (object) ['label' => 'C', 'index' => 'y', 'value' => 1, 'preferred' => true, 'group' => 'Group 2', 'attr' => ['attr2' => 'value2']];
+        $this->obj4 = (object) ['label' => 'D', 'index' => 'z', 'value' => 2, 'preferred' => false, 'group' => 'Group 2', 'attr' => []];
         $this->list = new ArrayChoiceList(
-            array('A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4)
+            ['A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4]
         );
         $this->factory = new DefaultChoiceListFactory();
     }
 
     public function testCreateFromChoicesEmpty()
     {
-        $list = $this->factory->createListFromChoices(array());
+        $list = $this->factory->createListFromChoices([]);
 
-        $this->assertSame(array(), $list->getChoices());
-        $this->assertSame(array(), $list->getValues());
+        $this->assertSame([], $list->getChoices());
+        $this->assertSame([], $list->getValues());
     }
 
     public function testCreateFromChoicesFlat()
     {
         $list = $this->factory->createListFromChoices(
-            array('A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4)
+            ['A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4]
         );
 
         $this->assertObjectListWithGeneratedValues($list);
@@ -116,7 +116,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesFlatTraversable()
     {
         $list = $this->factory->createListFromChoices(
-            new \ArrayIterator(array('A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4))
+            new \ArrayIterator(['A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4])
         );
 
         $this->assertObjectListWithGeneratedValues($list);
@@ -125,8 +125,8 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesFlatValuesAsCallable()
     {
         $list = $this->factory->createListFromChoices(
-            array('A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4),
-            array($this, 'getValue')
+            ['A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4],
+            [$this, 'getValue']
         );
 
         $this->assertObjectListWithCustomValues($list);
@@ -135,7 +135,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesFlatValuesAsClosure()
     {
         $list = $this->factory->createListFromChoices(
-            array('A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4),
+            ['A' => $this->obj1, 'B' => $this->obj2, 'C' => $this->obj3, 'D' => $this->obj4],
             function ($object) { return $object->value; }
         );
 
@@ -145,10 +145,10 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesGrouped()
     {
         $list = $this->factory->createListFromChoices(
-            array(
-                'Group 1' => array('A' => $this->obj1, 'B' => $this->obj2),
-                'Group 2' => array('C' => $this->obj3, 'D' => $this->obj4),
-            )
+            [
+                'Group 1' => ['A' => $this->obj1, 'B' => $this->obj2],
+                'Group 2' => ['C' => $this->obj3, 'D' => $this->obj4],
+            ]
         );
 
         $this->assertObjectListWithGeneratedValues($list);
@@ -157,10 +157,10 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesGroupedTraversable()
     {
         $list = $this->factory->createListFromChoices(
-            new \ArrayIterator(array(
-                    'Group 1' => array('A' => $this->obj1, 'B' => $this->obj2),
-                    'Group 2' => array('C' => $this->obj3, 'D' => $this->obj4),
-                ))
+            new \ArrayIterator([
+                    'Group 1' => ['A' => $this->obj1, 'B' => $this->obj2],
+                    'Group 2' => ['C' => $this->obj3, 'D' => $this->obj4],
+                ])
         );
 
         $this->assertObjectListWithGeneratedValues($list);
@@ -169,11 +169,11 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesGroupedValuesAsCallable()
     {
         $list = $this->factory->createListFromChoices(
-            array(
-                'Group 1' => array('A' => $this->obj1, 'B' => $this->obj2),
-                'Group 2' => array('C' => $this->obj3, 'D' => $this->obj4),
-            ),
-            array($this, 'getValue')
+            [
+                'Group 1' => ['A' => $this->obj1, 'B' => $this->obj2],
+                'Group 2' => ['C' => $this->obj3, 'D' => $this->obj4],
+            ],
+            [$this, 'getValue']
         );
 
         $this->assertObjectListWithCustomValues($list);
@@ -182,10 +182,10 @@ class DefaultChoiceListFactoryTest extends TestCase
     public function testCreateFromChoicesGroupedValuesAsClosure()
     {
         $list = $this->factory->createListFromChoices(
-            array(
-                'Group 1' => array('A' => $this->obj1, 'B' => $this->obj2),
-                'Group 2' => array('C' => $this->obj3, 'D' => $this->obj4),
-            ),
+            [
+                'Group 1' => ['A' => $this->obj1, 'B' => $this->obj2],
+                'Group 2' => ['C' => $this->obj3, 'D' => $this->obj4],
+            ],
             function ($object) { return $object->value; }
         );
 
@@ -216,12 +216,12 @@ class DefaultChoiceListFactoryTest extends TestCase
         $view = $this->factory->createView($this->list);
 
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     0 => new ChoiceView($this->obj1, '0', 'A'),
                     1 => new ChoiceView($this->obj2, '1', 'B'),
                     2 => new ChoiceView($this->obj3, '2', 'C'),
                     3 => new ChoiceView($this->obj4, '3', 'D'),
-                ), array()
+                ], []
         ), $view);
     }
 
@@ -229,7 +229,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3)
+            [$this->obj2, $this->obj3]
         );
 
         $this->assertFlatView($view);
@@ -239,16 +239,16 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array()
+            []
         );
 
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     0 => new ChoiceView($this->obj1, '0', 'A'),
                     1 => new ChoiceView($this->obj2, '1', 'B'),
                     2 => new ChoiceView($this->obj3, '2', 'C'),
                     3 => new ChoiceView($this->obj4, '3', 'D'),
-                ), array()
+                ], []
         ), $view);
     }
 
@@ -256,7 +256,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this, 'isPreferred')
+            [$this, 'isPreferred']
         );
 
         $this->assertFlatView($view);
@@ -305,8 +305,8 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
-            array($this, 'getLabel')
+            [$this->obj2, $this->obj3],
+            [$this, 'getLabel']
         );
 
         $this->assertFlatView($view);
@@ -316,7 +316,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             function ($object) {
                 return $object->label;
             }
@@ -329,7 +329,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             function ($object, $key) {
                 return $key;
             }
@@ -342,7 +342,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             function ($object, $key, $value) {
                 switch ($value) {
                     case '0': return 'A';
@@ -360,9 +360,9 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
-            array($this, 'getFormIndex')
+            [$this, 'getFormIndex']
         );
 
         $this->assertFlatViewWithCustomIndices($view);
@@ -372,7 +372,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             function ($object) {
                 return $object->index;
@@ -386,7 +386,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             function ($object, $key) {
                 switch ($key) {
@@ -405,7 +405,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             function ($object, $key, $value) {
                 switch ($value) {
@@ -422,15 +422,15 @@ class DefaultChoiceListFactoryTest extends TestCase
 
     public function testCreateViewFlatGroupByOriginalStructure()
     {
-        $list = new ArrayChoiceList(array(
-            'Group 1' => array('A' => $this->obj1, 'B' => $this->obj2),
-            'Group 2' => array('C' => $this->obj3, 'D' => $this->obj4),
-            'Group empty' => array(),
-        ));
+        $list = new ArrayChoiceList([
+            'Group 1' => ['A' => $this->obj1, 'B' => $this->obj2],
+            'Group 2' => ['C' => $this->obj3, 'D' => $this->obj4],
+            'Group empty' => [],
+        ]);
 
         $view = $this->factory->createView(
             $list,
-            array($this->obj2, $this->obj3)
+            [$this->obj2, $this->obj3]
         );
 
         $this->assertGroupedView($view);
@@ -440,7 +440,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null  // group
@@ -453,10 +453,10 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
-            array($this, 'getGroup')
+            [$this, 'getGroup']
         );
 
         $this->assertGroupedView($view);
@@ -466,10 +466,10 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
-            array($this, 'getGroupAsObject')
+            [$this, 'getGroupAsObject']
         );
 
         $this->assertGroupedView($view);
@@ -482,7 +482,7 @@ class DefaultChoiceListFactoryTest extends TestCase
 
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             function ($object) use ($obj1, $obj2) {
@@ -497,7 +497,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             function ($object, $key) {
@@ -512,7 +512,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             function ($object, $key, $value) {
@@ -527,14 +527,14 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
-            array(
-                'B' => array('attr1' => 'value1'),
-                'C' => array('attr2' => 'value2'),
-            )
+            [
+                'B' => ['attr1' => 'value1'],
+                'C' => ['attr2' => 'value2'],
+            ]
         );
 
         $this->assertFlatViewWithAttr($view);
@@ -544,11 +544,11 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
-            array()
+            []
         );
 
         $this->assertFlatView($view);
@@ -558,11 +558,11 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
-            array($this, 'getAttr')
+            [$this, 'getAttr']
         );
 
         $this->assertFlatViewWithAttr($view);
@@ -572,7 +572,7 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
@@ -588,15 +588,15 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
             function ($object, $key) {
                 switch ($key) {
-                    case 'B': return array('attr1' => 'value1');
-                    case 'C': return array('attr2' => 'value2');
-                    default: return array();
+                    case 'B': return ['attr1' => 'value1'];
+                    case 'C': return ['attr2' => 'value2'];
+                    default: return [];
                 }
             }
         );
@@ -608,15 +608,15 @@ class DefaultChoiceListFactoryTest extends TestCase
     {
         $view = $this->factory->createView(
             $this->list,
-            array($this->obj2, $this->obj3),
+            [$this->obj2, $this->obj3],
             null, // label
             null, // index
             null, // group
             function ($object, $key, $value) {
                 switch ($value) {
-                    case '1': return array('attr1' => 'value1');
-                    case '2': return array('attr2' => 'value2');
-                    default: return array();
+                    case '1': return ['attr1' => 'value1'];
+                    case '2': return ['attr2' => 'value2'];
+                    default: return [];
                 }
             }
         );
@@ -626,151 +626,151 @@ class DefaultChoiceListFactoryTest extends TestCase
 
     private function assertScalarListWithChoiceValues(ChoiceListInterface $list)
     {
-        $this->assertSame(array('a', 'b', 'c', 'd'), $list->getValues());
+        $this->assertSame(['a', 'b', 'c', 'd'], $list->getValues());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => 'a',
             'b' => 'b',
             'c' => 'c',
             'd' => 'd',
-        ), $list->getChoices());
+        ], $list->getChoices());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => 'A',
             'b' => 'B',
             'c' => 'C',
             'd' => 'D',
-        ), $list->getOriginalKeys());
+        ], $list->getOriginalKeys());
     }
 
     private function assertObjectListWithGeneratedValues(ChoiceListInterface $list)
     {
-        $this->assertSame(array('0', '1', '2', '3'), $list->getValues());
+        $this->assertSame(['0', '1', '2', '3'], $list->getValues());
 
-        $this->assertSame(array(
+        $this->assertSame([
             0 => $this->obj1,
             1 => $this->obj2,
             2 => $this->obj3,
             3 => $this->obj4,
-        ), $list->getChoices());
+        ], $list->getChoices());
 
-        $this->assertSame(array(
+        $this->assertSame([
             0 => 'A',
             1 => 'B',
             2 => 'C',
             3 => 'D',
-        ), $list->getOriginalKeys());
+        ], $list->getOriginalKeys());
     }
 
     private function assertScalarListWithCustomValues(ChoiceListInterface $list)
     {
-        $this->assertSame(array('a', 'b', '1', '2'), $list->getValues());
+        $this->assertSame(['a', 'b', '1', '2'], $list->getValues());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => 'a',
             'b' => 'b',
             1 => 'c',
             2 => 'd',
-        ), $list->getChoices());
+        ], $list->getChoices());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => 'A',
             'b' => 'B',
             1 => 'C',
             2 => 'D',
-        ), $list->getOriginalKeys());
+        ], $list->getOriginalKeys());
     }
 
     private function assertObjectListWithCustomValues(ChoiceListInterface $list)
     {
-        $this->assertSame(array('a', 'b', '1', '2'), $list->getValues());
+        $this->assertSame(['a', 'b', '1', '2'], $list->getValues());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => $this->obj1,
             'b' => $this->obj2,
             1 => $this->obj3,
             2 => $this->obj4,
-        ), $list->getChoices());
+        ], $list->getChoices());
 
-        $this->assertSame(array(
+        $this->assertSame([
             'a' => 'A',
             'b' => 'B',
             1 => 'C',
             2 => 'D',
-        ), $list->getOriginalKeys());
+        ], $list->getOriginalKeys());
     }
 
     private function assertFlatView($view)
     {
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     0 => new ChoiceView($this->obj1, '0', 'A'),
                     3 => new ChoiceView($this->obj4, '3', 'D'),
-                ), array(
+                ], [
                     1 => new ChoiceView($this->obj2, '1', 'B'),
                     2 => new ChoiceView($this->obj3, '2', 'C'),
-                )
+                ]
         ), $view);
     }
 
     private function assertFlatViewWithCustomIndices($view)
     {
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     'w' => new ChoiceView($this->obj1, '0', 'A'),
                     'z' => new ChoiceView($this->obj4, '3', 'D'),
-                ), array(
+                ], [
                     'x' => new ChoiceView($this->obj2, '1', 'B'),
                     'y' => new ChoiceView($this->obj3, '2', 'C'),
-                )
+                ]
         ), $view);
     }
 
     private function assertFlatViewWithAttr($view)
     {
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     0 => new ChoiceView($this->obj1, '0', 'A'),
                     3 => new ChoiceView($this->obj4, '3', 'D'),
-                ), array(
+                ], [
                     1 => new ChoiceView(
                         $this->obj2,
                         '1',
                         'B',
-                        array('attr1' => 'value1')
+                        ['attr1' => 'value1']
                     ),
                     2 => new ChoiceView(
                         $this->obj3,
                         '2',
                         'C',
-                        array('attr2' => 'value2')
+                        ['attr2' => 'value2']
                     ),
-                )
+                ]
         ), $view);
     }
 
     private function assertGroupedView($view)
     {
         $this->assertEquals(new ChoiceListView(
-                array(
+                [
                     'Group 1' => new ChoiceGroupView(
                         'Group 1',
-                        array(0 => new ChoiceView($this->obj1, '0', 'A'))
+                        [0 => new ChoiceView($this->obj1, '0', 'A')]
                     ),
                     'Group 2' => new ChoiceGroupView(
                         'Group 2',
-                        array(3 => new ChoiceView($this->obj4, '3', 'D'))
+                        [3 => new ChoiceView($this->obj4, '3', 'D')]
                     ),
-                ), array(
+                ], [
                     'Group 1' => new ChoiceGroupView(
                         'Group 1',
-                        array(1 => new ChoiceView($this->obj2, '1', 'B'))
+                        [1 => new ChoiceView($this->obj2, '1', 'B')]
                     ),
                     'Group 2' => new ChoiceGroupView(
                         'Group 2',
-                        array(2 => new ChoiceView($this->obj3, '2', 'C'))
+                        [2 => new ChoiceView($this->obj3, '2', 'C')]
                     ),
-                )
+                ]
         ), $view);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
index 43c91c363d..e4ef0e601a 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/PropertyAccessDecoratorTest.php
@@ -38,7 +38,7 @@ class PropertyAccessDecoratorTest extends TestCase
 
     public function testCreateFromChoicesPropertyPath()
     {
-        $choices = array((object) array('property' => 'value'));
+        $choices = [(object) ['property' => 'value']];
 
         $this->decoratedFactory->expects($this->once())
             ->method('createListFromChoices')
@@ -47,12 +47,12 @@ class PropertyAccessDecoratorTest extends TestCase
                 return array_map($callback, $choices);
             }));
 
-        $this->assertSame(array('value'), $this->factory->createListFromChoices($choices, 'property'));
+        $this->assertSame(['value'], $this->factory->createListFromChoices($choices, 'property'));
     }
 
     public function testCreateFromChoicesPropertyPathInstance()
     {
-        $choices = array((object) array('property' => 'value'));
+        $choices = [(object) ['property' => 'value']];
 
         $this->decoratedFactory->expects($this->once())
             ->method('createListFromChoices')
@@ -61,7 +61,7 @@ class PropertyAccessDecoratorTest extends TestCase
                 return array_map($callback, $choices);
             }));
 
-        $this->assertSame(array('value'), $this->factory->createListFromChoices($choices, new PropertyPath('property')));
+        $this->assertSame(['value'], $this->factory->createListFromChoices($choices, new PropertyPath('property')));
     }
 
     public function testCreateFromLoaderPropertyPath()
@@ -72,7 +72,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createListFromLoader')
             ->with($loader, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($loader, $callback) {
-                return $callback((object) array('property' => 'value'));
+                return $callback((object) ['property' => 'value']);
             }));
 
         $this->assertSame('value', $this->factory->createListFromLoader($loader, 'property'));
@@ -81,7 +81,7 @@ class PropertyAccessDecoratorTest extends TestCase
     // https://github.com/symfony/symfony/issues/5494
     public function testCreateFromChoicesAssumeNullIfValuePropertyPathUnreadable()
     {
-        $choices = array(null);
+        $choices = [null];
 
         $this->decoratedFactory->expects($this->once())
             ->method('createListFromChoices')
@@ -90,7 +90,7 @@ class PropertyAccessDecoratorTest extends TestCase
                 return array_map($callback, $choices);
             }));
 
-        $this->assertSame(array(null), $this->factory->createListFromChoices($choices, 'property'));
+        $this->assertSame([null], $this->factory->createListFromChoices($choices, 'property'));
     }
 
     // https://github.com/symfony/symfony/issues/5494
@@ -116,7 +116,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createListFromLoader')
             ->with($loader, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($loader, $callback) {
-                return $callback((object) array('property' => 'value'));
+                return $callback((object) ['property' => 'value']);
             }));
 
         $this->assertSame('value', $this->factory->createListFromLoader($loader, new PropertyPath('property')));
@@ -130,7 +130,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred) {
-                return $preferred((object) array('property' => true));
+                return $preferred((object) ['property' => true]);
             }));
 
         $this->assertTrue($this->factory->createView(
@@ -147,7 +147,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred) {
-                return $preferred((object) array('property' => true));
+                return $preferred((object) ['property' => true]);
             }));
 
         $this->assertTrue($this->factory->createView(
@@ -165,7 +165,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred) {
-                return $preferred((object) array('category' => null));
+                return $preferred((object) ['category' => null]);
             }));
 
         $this->assertFalse($this->factory->createView(
@@ -182,7 +182,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label) {
-                return $label((object) array('property' => 'label'));
+                return $label((object) ['property' => 'label']);
             }));
 
         $this->assertSame('label', $this->factory->createView(
@@ -200,7 +200,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label) {
-                return $label((object) array('property' => 'label'));
+                return $label((object) ['property' => 'label']);
             }));
 
         $this->assertSame('label', $this->factory->createView(
@@ -218,7 +218,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index) {
-                return $index((object) array('property' => 'index'));
+                return $index((object) ['property' => 'index']);
             }));
 
         $this->assertSame('index', $this->factory->createView(
@@ -237,7 +237,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index) {
-                return $index((object) array('property' => 'index'));
+                return $index((object) ['property' => 'index']);
             }));
 
         $this->assertSame('index', $this->factory->createView(
@@ -256,7 +256,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index, $groupBy) {
-                return $groupBy((object) array('property' => 'group'));
+                return $groupBy((object) ['property' => 'group']);
             }));
 
         $this->assertSame('group', $this->factory->createView(
@@ -276,7 +276,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index, $groupBy) {
-                return $groupBy((object) array('property' => 'group'));
+                return $groupBy((object) ['property' => 'group']);
             }));
 
         $this->assertSame('group', $this->factory->createView(
@@ -297,7 +297,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index, $groupBy) {
-                return $groupBy((object) array('group' => null));
+                return $groupBy((object) ['group' => null]);
             }));
 
         $this->assertNull($this->factory->createView(
@@ -317,7 +317,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index, $groupBy, $attr) {
-                return $attr((object) array('property' => 'attr'));
+                return $attr((object) ['property' => 'attr']);
             }));
 
         $this->assertSame('attr', $this->factory->createView(
@@ -338,7 +338,7 @@ class PropertyAccessDecoratorTest extends TestCase
             ->method('createView')
             ->with($list, null, null, null, null, $this->isInstanceOf('\Closure'))
             ->will($this->returnCallback(function ($list, $preferred, $label, $index, $groupBy, $attr) {
-                return $attr((object) array('property' => 'attr'));
+                return $attr((object) ['property' => 'attr']);
             }));
 
         $this->assertSame('attr', $this->factory->createView(
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
index 57b1259254..d61d1131c5 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/LazyChoiceListTest.php
@@ -112,11 +112,11 @@ class LazyChoiceListTest extends TestCase
     {
         $this->loader->expects($this->exactly(2))
             ->method('loadChoicesForValues')
-            ->with(array('a', 'b'))
+            ->with(['a', 'b'])
             ->will($this->returnValue('RESULT'));
 
-        $this->assertSame('RESULT', $this->list->getChoicesForValues(array('a', 'b')));
-        $this->assertSame('RESULT', $this->list->getChoicesForValues(array('a', 'b')));
+        $this->assertSame('RESULT', $this->list->getChoicesForValues(['a', 'b']));
+        $this->assertSame('RESULT', $this->list->getChoicesForValues(['a', 'b']));
     }
 
     public function testGetChoicesForValuesUsesLoadedList()
@@ -128,14 +128,14 @@ class LazyChoiceListTest extends TestCase
 
         $this->loader->expects($this->exactly(2))
             ->method('loadChoicesForValues')
-            ->with(array('a', 'b'))
+            ->with(['a', 'b'])
             ->will($this->returnValue('RESULT'));
 
         // load choice list
         $this->list->getChoices();
 
-        $this->assertSame('RESULT', $this->list->getChoicesForValues(array('a', 'b')));
-        $this->assertSame('RESULT', $this->list->getChoicesForValues(array('a', 'b')));
+        $this->assertSame('RESULT', $this->list->getChoicesForValues(['a', 'b']));
+        $this->assertSame('RESULT', $this->list->getChoicesForValues(['a', 'b']));
     }
 
     public function testGetValuesForChoicesUsesLoadedList()
@@ -147,13 +147,13 @@ class LazyChoiceListTest extends TestCase
 
         $this->loader->expects($this->exactly(2))
             ->method('loadValuesForChoices')
-            ->with(array('a', 'b'))
+            ->with(['a', 'b'])
             ->will($this->returnValue('RESULT'));
 
         // load choice list
         $this->list->getChoices();
 
-        $this->assertSame('RESULT', $this->list->getValuesForChoices(array('a', 'b')));
-        $this->assertSame('RESULT', $this->list->getValuesForChoices(array('a', 'b')));
+        $this->assertSame('RESULT', $this->list->getValuesForChoices(['a', 'b']));
+        $this->assertSame('RESULT', $this->list->getValuesForChoices(['a', 'b']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Loader/CallbackChoiceLoaderTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Loader/CallbackChoiceLoaderTest.php
index 7a1a96d1e6..362783c91e 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Loader/CallbackChoiceLoaderTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Loader/CallbackChoiceLoaderTest.php
@@ -53,11 +53,11 @@ class CallbackChoiceLoaderTest extends TestCase
         self::$value = function ($choice) {
             return isset($choice->value) ? $choice->value : null;
         };
-        self::$choices = array(
-            (object) array('value' => 'choice_one'),
-            (object) array('value' => 'choice_two'),
-        );
-        self::$choiceValues = array('choice_one', 'choice_two');
+        self::$choices = [
+            (object) ['value' => 'choice_one'],
+            (object) ['value' => 'choice_two'],
+        ];
+        self::$choiceValues = ['choice_one', 'choice_two'];
         self::$lazyChoiceList = new LazyChoiceList(self::$loader, self::$value);
     }
 
@@ -95,8 +95,8 @@ class CallbackChoiceLoaderTest extends TestCase
     {
         self::$loader = null;
         self::$value = null;
-        self::$choices = array();
-        self::$choiceValues = array();
+        self::$choices = [];
+        self::$choiceValues = [];
         self::$lazyChoiceList = null;
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Loader/IntlCallbackChoiceLoaderTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Loader/IntlCallbackChoiceLoaderTest.php
index 12bfd74632..7571517283 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Loader/IntlCallbackChoiceLoaderTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Loader/IntlCallbackChoiceLoaderTest.php
@@ -55,11 +55,11 @@ class IntlCallbackChoiceLoaderTest extends TestCase
         self::$value = function ($choice) {
             return $choice->value ?? null;
         };
-        self::$choices = array(
-            (object) array('value' => 'choice_one'),
-            (object) array('value' => 'choice_two'),
-        );
-        self::$choiceValues = array('choice_one', 'choice_two');
+        self::$choices = [
+            (object) ['value' => 'choice_one'],
+            (object) ['value' => 'choice_two'],
+        ];
+        self::$choiceValues = ['choice_one', 'choice_two'];
         self::$lazyChoiceList = new LazyChoiceList(self::$loader, self::$value);
     }
 
@@ -86,7 +86,7 @@ class IntlCallbackChoiceLoaderTest extends TestCase
 
     public function testLoadChoicesForValuesDropsNonExistentChoices()
     {
-        $this->assertSame(array(), self::$loader->loadChoicesForValues(array('foo')));
+        $this->assertSame([], self::$loader->loadChoicesForValues(['foo']));
     }
 
     public function testLoadValuesForChoicesLoadsChoiceListOnFirstCall()
@@ -102,8 +102,8 @@ class IntlCallbackChoiceLoaderTest extends TestCase
     {
         self::$loader = null;
         self::$value = null;
-        self::$choices = array();
-        self::$choiceValues = array();
+        self::$choices = [];
+        self::$choiceValues = [];
         self::$lazyChoiceList = null;
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Command/DebugCommandTest.php b/src/Symfony/Component/Form/Tests/Command/DebugCommandTest.php
index cc549a4bec..3f4f3b1bff 100644
--- a/src/Symfony/Component/Form/Tests/Command/DebugCommandTest.php
+++ b/src/Symfony/Component/Form/Tests/Command/DebugCommandTest.php
@@ -28,7 +28,7 @@ class DebugCommandTest extends TestCase
     public function testDebugDefaults()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array(), array('decorated' => false));
+        $ret = $tester->execute([], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Built-in form types', $tester->getDisplay());
@@ -36,8 +36,8 @@ class DebugCommandTest extends TestCase
 
     public function testDebugDeprecatedDefaults()
     {
-        $tester = $this->createCommandTester(array('Symfony\Component\Form\Tests\Console\Descriptor'), array(TextType::class, FooType::class));
-        $ret = $tester->execute(array('--show-deprecated' => true), array('decorated' => false));
+        $tester = $this->createCommandTester(['Symfony\Component\Form\Tests\Console\Descriptor'], [TextType::class, FooType::class]);
+        $ret = $tester->execute(['--show-deprecated' => true], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertSame(<<<TXT
@@ -60,7 +60,7 @@ TXT
     public function testDebugSingleFormType()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('class' => 'FormType'), array('decorated' => false));
+        $ret = $tester->execute(['class' => 'FormType'], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Symfony\Component\Form\Extension\Core\Type\FormType (Block prefix: "form")', $tester->getDisplay());
@@ -69,7 +69,7 @@ TXT
     public function testDebugFormTypeOption()
     {
         $tester = $this->createCommandTester();
-        $ret = $tester->execute(array('class' => 'FormType', 'option' => 'method'), array('decorated' => false));
+        $ret = $tester->execute(['class' => 'FormType', 'option' => 'method'], ['decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertContains('Symfony\Component\Form\Extension\Core\Type\FormType (method)', $tester->getDisplay());
@@ -82,7 +82,7 @@ TXT
     public function testDebugSingleFormTypeNotFound()
     {
         $tester = $this->createCommandTester();
-        $tester->execute(array('class' => 'NonExistentType'), array('decorated' => false, 'interactive' => false));
+        $tester->execute(['class' => 'NonExistentType'], ['decorated' => false, 'interactive' => false]);
     }
 
     public function testDebugAmbiguousFormType()
@@ -102,23 +102,23 @@ TXT;
             $this->setExpectedException(InvalidArgumentException::class, $expectedMessage);
         }
 
-        $tester = $this->createCommandTester(array(
+        $tester = $this->createCommandTester([
             'Symfony\Component\Form\Tests\Fixtures\Debug\A',
             'Symfony\Component\Form\Tests\Fixtures\Debug\B',
-        ));
+        ]);
 
-        $tester->execute(array('class' => 'AmbiguousType'), array('decorated' => false, 'interactive' => false));
+        $tester->execute(['class' => 'AmbiguousType'], ['decorated' => false, 'interactive' => false]);
     }
 
     public function testDebugAmbiguousFormTypeInteractive()
     {
-        $tester = $this->createCommandTester(array(
+        $tester = $this->createCommandTester([
             'Symfony\Component\Form\Tests\Fixtures\Debug\A',
             'Symfony\Component\Form\Tests\Fixtures\Debug\B',
-        ));
+        ]);
 
-        $tester->setInputs(array(0));
-        $tester->execute(array('class' => 'AmbiguousType'), array('decorated' => false, 'interactive' => true));
+        $tester->setInputs([0]);
+        $tester->execute(['class' => 'AmbiguousType'], ['decorated' => false, 'interactive' => true]);
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
         $output = $tester->getDisplay(true);
@@ -141,12 +141,12 @@ TXT
      */
     public function testDebugInvalidFormType()
     {
-        $this->createCommandTester()->execute(array('class' => 'test'));
+        $this->createCommandTester()->execute(['class' => 'test']);
     }
 
-    private function createCommandTester(array $namespaces = array('Symfony\Component\Form\Extension\Core\Type'), array $types = array())
+    private function createCommandTester(array $namespaces = ['Symfony\Component\Form\Extension\Core\Type'], array $types = [])
     {
-        $formRegistry = new FormRegistry(array(), new ResolvedFormTypeFactory());
+        $formRegistry = new FormRegistry([], new ResolvedFormTypeFactory());
         $command = new DebugCommand($formRegistry, $namespaces, $types);
         $application = new Application();
         $application->add($command);
@@ -166,11 +166,11 @@ class FooType extends AbstractType
             $foo = $options['foo'];
 
             return function (FormInterface $form) use ($foo) {
-                return $form->getConfig()->getCompound() ? array($foo) : $foo;
+                return $form->getConfig()->getCompound() ? [$foo] : $foo;
             };
         });
         $resolver->setAllowedTypes('foo', 'string');
-        $resolver->setAllowedValues('foo', array('bar', 'baz'));
+        $resolver->setAllowedValues('foo', ['bar', 'baz']);
         $resolver->setNormalizer('foo', function (Options $options, $value) {
             return (string) $value;
         });
diff --git a/src/Symfony/Component/Form/Tests/CompoundFormPerformanceTest.php b/src/Symfony/Component/Form/Tests/CompoundFormPerformanceTest.php
index e5d8e9a987..b9c81f1d1e 100644
--- a/src/Symfony/Component/Form/Tests/CompoundFormPerformanceTest.php
+++ b/src/Symfony/Component/Form/Tests/CompoundFormPerformanceTest.php
@@ -31,16 +31,16 @@ class CompoundFormPerformanceTest extends FormPerformanceTestCase
             $form = $this->factory->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType')
                 ->add('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType')
                 ->add('lastName', 'Symfony\Component\Form\Extension\Core\Type\TextType')
-                ->add('color', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array(
-                    'choices' => array('red' => 'Red', 'blue' => 'Blue'),
+                ->add('color', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', [
+                    'choices' => ['red' => 'Red', 'blue' => 'Blue'],
                     'required' => false,
-                ))
+                ])
                 ->add('age', 'Symfony\Component\Form\Extension\Core\Type\NumberType')
                 ->add('birthDate', 'Symfony\Component\Form\Extension\Core\Type\BirthdayType')
-                ->add('city', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', array(
+                ->add('city', 'Symfony\Component\Form\Extension\Core\Type\ChoiceType', [
                     // simulate 300 different cities
                     'choices' => range(1, 300),
-                ))
+                ])
                 ->getForm();
 
             // load the form into a view
diff --git a/src/Symfony/Component/Form/Tests/CompoundFormTest.php b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
index ddacc35572..981e9609ce 100644
--- a/src/Symfony/Component/Form/Tests/CompoundFormTest.php
+++ b/src/Symfony/Component/Form/Tests/CompoundFormTest.php
@@ -28,10 +28,10 @@ class CompoundFormTest extends AbstractFormTest
         $this->form->add($this->getBuilder('firstName')->getForm());
         $this->form->add($this->getBuilder('lastName')->getForm());
 
-        $this->form->submit(array(
+        $this->form->submit([
             'firstName' => 'Bernhard',
             'lastName' => 'Schussek',
-        ));
+        ]);
 
         $this->assertTrue($this->form->isValid());
     }
@@ -41,10 +41,10 @@ class CompoundFormTest extends AbstractFormTest
         $this->form->add($this->getBuilder('firstName')->getForm());
         $this->form->add($this->getBuilder('lastName')->getForm());
 
-        $this->form->submit(array(
+        $this->form->submit([
             'firstName' => 'Bernhard',
             'lastName' => 'Schussek',
-        ));
+        ]);
 
         $this->form->get('lastName')->addError(new FormError('Invalid'));
 
@@ -60,7 +60,7 @@ class CompoundFormTest extends AbstractFormTest
             ->add($this->getBuilder('name'))
             ->getForm();
 
-        $form->submit(array('name' => 'Jacques Doe'));
+        $form->submit(['name' => 'Jacques Doe']);
 
         $form->get('name')->addError(new FormError('Invalid'));
 
@@ -77,7 +77,7 @@ class CompoundFormTest extends AbstractFormTest
             ->method('submit')
             ->with($this->equalTo(null));
 
-        $this->form->submit(array('firstName' => null), false);
+        $this->form->submit(['firstName' => null], false);
     }
 
     public function testSubmitForwardsNullIfValueIsMissing()
@@ -90,7 +90,7 @@ class CompoundFormTest extends AbstractFormTest
             ->method('submit')
             ->with($this->equalTo(null));
 
-        $this->form->submit(array());
+        $this->form->submit([]);
     }
 
     public function testSubmitDoesNotForwardNullIfNotClearMissing()
@@ -102,7 +102,7 @@ class CompoundFormTest extends AbstractFormTest
         $child->expects($this->never())
             ->method('submit');
 
-        $this->form->submit(array(), false);
+        $this->form->submit([], false);
     }
 
     public function testSubmitDoesNotAddExtraFieldForNullValues()
@@ -110,10 +110,10 @@ class CompoundFormTest extends AbstractFormTest
         $factory = Forms::createFormFactoryBuilder()
             ->getFormFactory();
 
-        $child = $factory->createNamed('file', 'Symfony\Component\Form\Extension\Core\Type\FileType', null, array('auto_initialize' => false));
+        $child = $factory->createNamed('file', 'Symfony\Component\Form\Extension\Core\Type\FileType', null, ['auto_initialize' => false]);
 
         $this->form->add($child);
-        $this->form->submit(array('file' => null), false);
+        $this->form->submit(['file' => null], false);
 
         $this->assertCount(0, $this->form->getExtraData());
     }
@@ -128,7 +128,7 @@ class CompoundFormTest extends AbstractFormTest
             ->method('submit')
             ->with($this->equalTo('foo'), false);
 
-        $this->form->submit(array('firstName' => 'foo'), false);
+        $this->form->submit(['firstName' => 'foo'], false);
     }
 
     public function testCloneChildren()
@@ -163,7 +163,7 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->assertTrue($this->form->has('foo'));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array('foo' => $child), $this->form->all());
+        $this->assertSame(['foo' => $child], $this->form->all());
     }
 
     public function testAddUsingNameAndType()
@@ -172,17 +172,17 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->factory->expects($this->once())
             ->method('createNamed')
-            ->with('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+            ->with('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
                 'bar' => 'baz',
                 'auto_initialize' => false,
-            ))
+            ])
             ->will($this->returnValue($child));
 
-        $this->form->add('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('bar' => 'baz'));
+        $this->form->add('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['bar' => 'baz']);
 
         $this->assertTrue($this->form->has('foo'));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array('foo' => $child), $this->form->all());
+        $this->assertSame(['foo' => $child], $this->form->all());
     }
 
     public function testAddUsingIntegerNameAndType()
@@ -191,18 +191,18 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->factory->expects($this->once())
             ->method('createNamed')
-            ->with('0', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array(
+            ->with('0', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [
                 'bar' => 'baz',
                 'auto_initialize' => false,
-            ))
+            ])
             ->will($this->returnValue($child));
 
         // in order to make casting unnecessary
-        $this->form->add(0, 'Symfony\Component\Form\Extension\Core\Type\TextType', array('bar' => 'baz'));
+        $this->form->add(0, 'Symfony\Component\Form\Extension\Core\Type\TextType', ['bar' => 'baz']);
 
         $this->assertTrue($this->form->has(0));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array(0 => $child), $this->form->all());
+        $this->assertSame([0 => $child], $this->form->all());
     }
 
     public function testAddWithoutType()
@@ -218,7 +218,7 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->assertTrue($this->form->has('foo'));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array('foo' => $child), $this->form->all());
+        $this->assertSame(['foo' => $child], $this->form->all());
     }
 
     public function testAddUsingNameButNoType()
@@ -239,7 +239,7 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->assertTrue($this->form->has('foo'));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array('foo' => $child), $this->form->all());
+        $this->assertSame(['foo' => $child], $this->form->all());
     }
 
     public function testAddUsingNameButNoTypeAndOptions()
@@ -253,17 +253,17 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->factory->expects($this->once())
             ->method('createForProperty')
-            ->with('\stdClass', 'foo', null, array(
+            ->with('\stdClass', 'foo', null, [
                 'bar' => 'baz',
                 'auto_initialize' => false,
-            ))
+            ])
             ->will($this->returnValue($child));
 
-        $this->form->add('foo', null, array('bar' => 'baz'));
+        $this->form->add('foo', null, ['bar' => 'baz']);
 
         $this->assertTrue($this->form->has('foo'));
         $this->assertSame($this->form, $child->getParent());
-        $this->assertSame(array('foo' => $child), $this->form->all());
+        $this->assertSame(['foo' => $child], $this->form->all());
     }
 
     /**
@@ -271,7 +271,7 @@ class CompoundFormTest extends AbstractFormTest
      */
     public function testAddThrowsExceptionIfAlreadySubmitted()
     {
-        $this->form->submit(array());
+        $this->form->submit([]);
         $this->form->add($this->getBuilder('foo')->getForm());
     }
 
@@ -291,7 +291,7 @@ class CompoundFormTest extends AbstractFormTest
     public function testRemoveThrowsExceptionIfAlreadySubmitted()
     {
         $this->form->add($this->getBuilder('foo')->setCompound(false)->getForm());
-        $this->form->submit(array('foo' => 'bar'));
+        $this->form->submit(['foo' => 'bar']);
         $this->form->remove('foo');
     }
 
@@ -338,10 +338,10 @@ class CompoundFormTest extends AbstractFormTest
         $form = $this->getBuilder()
             ->setCompound(true)
             ->setDataMapper($mapper)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'foo' => 'bar',
-            )))
+            ]))
             ->setData('foo')
             ->getForm();
 
@@ -351,7 +351,7 @@ class CompoundFormTest extends AbstractFormTest
             ->with('bar', $this->isInstanceOf('\RecursiveIteratorIterator'))
             ->will($this->returnCallback(function ($data, \RecursiveIteratorIterator $iterator) use ($child) {
                 $this->assertInstanceOf('Symfony\Component\Form\Util\InheritDataAwareIterator', $iterator->getInnerIterator());
-                $this->assertSame(array($child->getName() => $child), iterator_to_array($iterator));
+                $this->assertSame([$child->getName() => $child], iterator_to_array($iterator));
             }));
 
         $form->initialize();
@@ -422,7 +422,7 @@ class CompoundFormTest extends AbstractFormTest
             ->method('setData');
 
         // pass NULL to all children
-        $form->setData(array());
+        $form->setData([]);
     }
 
     public function testSetDataMapsViewDataToChildren()
@@ -431,10 +431,10 @@ class CompoundFormTest extends AbstractFormTest
         $form = $this->getBuilder()
             ->setCompound(true)
             ->setDataMapper($mapper)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'foo' => 'bar',
-            )))
+            ]))
             ->getForm();
 
         $form->add($child1 = $this->getBuilder('firstName')->getForm());
@@ -445,7 +445,7 @@ class CompoundFormTest extends AbstractFormTest
             ->with('bar', $this->isInstanceOf('\RecursiveIteratorIterator'))
             ->will($this->returnCallback(function ($data, \RecursiveIteratorIterator $iterator) use ($child1, $child2) {
                 $this->assertInstanceOf('Symfony\Component\Form\Util\InheritDataAwareIterator', $iterator->getInnerIterator());
-                $this->assertSame(array('firstName' => $child1, 'lastName' => $child2), iterator_to_array($iterator));
+                $this->assertSame(['firstName' => $child1, 'lastName' => $child2], iterator_to_array($iterator));
             }));
 
         $form->setData('foo');
@@ -476,7 +476,7 @@ class CompoundFormTest extends AbstractFormTest
             ->method('submit');
 
         // pass NULL to all children
-        $this->form->submit(array());
+        $this->form->submit([]);
     }
 
     public function testSubmitMapsSubmittedChildrenOntoExistingViewData()
@@ -485,10 +485,10 @@ class CompoundFormTest extends AbstractFormTest
         $form = $this->getBuilder()
             ->setCompound(true)
             ->setDataMapper($mapper)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'foo' => 'bar',
-            )))
+            ]))
             ->setData('foo')
             ->getForm();
 
@@ -500,15 +500,15 @@ class CompoundFormTest extends AbstractFormTest
             ->with($this->isInstanceOf('\RecursiveIteratorIterator'), 'bar')
             ->will($this->returnCallback(function (\RecursiveIteratorIterator $iterator) use ($child1, $child2) {
                 $this->assertInstanceOf('Symfony\Component\Form\Util\InheritDataAwareIterator', $iterator->getInnerIterator());
-                $this->assertSame(array('firstName' => $child1, 'lastName' => $child2), iterator_to_array($iterator));
+                $this->assertSame(['firstName' => $child1, 'lastName' => $child2], iterator_to_array($iterator));
                 $this->assertEquals('Bernhard', $child1->getData());
                 $this->assertEquals('Schussek', $child2->getData());
             }));
 
-        $form->submit(array(
+        $form->submit([
             'firstName' => 'Bernhard',
             'lastName' => 'Schussek',
-        ));
+        ]);
     }
 
     public function testMapFormsToDataIsNotInvokedIfInheritData()
@@ -518,10 +518,10 @@ class CompoundFormTest extends AbstractFormTest
             ->setCompound(true)
             ->setDataMapper($mapper)
             ->setInheritData(true)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'foo' => 'bar',
-            )))
+            ]))
             ->getForm();
 
         $form->add($child1 = $this->getBuilder('firstName')->setCompound(false)->getForm());
@@ -530,10 +530,10 @@ class CompoundFormTest extends AbstractFormTest
         $mapper->expects($this->never())
             ->method('mapFormsToData');
 
-        $form->submit(array(
+        $form->submit([
             'firstName' => 'Bernhard',
             'lastName' => 'Schussek',
-        ));
+        ]);
     }
 
     /*
@@ -549,7 +549,7 @@ class CompoundFormTest extends AbstractFormTest
             ->setData($object)
             ->getForm();
 
-        $form->submit(array());
+        $form->submit([]);
 
         $this->assertSame($object, $form->getData());
     }
@@ -572,22 +572,22 @@ class CompoundFormTest extends AbstractFormTest
             ->with($this->isInstanceOf('\RecursiveIteratorIterator'), $object)
             ->will($this->returnCallback(function (\RecursiveIteratorIterator $iterator) use ($child) {
                 $this->assertInstanceOf('Symfony\Component\Form\Util\InheritDataAwareIterator', $iterator->getInnerIterator());
-                $this->assertSame(array('name' => $child), iterator_to_array($iterator));
+                $this->assertSame(['name' => $child], iterator_to_array($iterator));
             }));
 
-        $form->submit(array(
+        $form->submit([
             'name' => 'Bernhard',
-        ));
+        ]);
     }
 
     public function requestMethodProvider()
     {
-        return array(
-            array('POST'),
-            array('PUT'),
-            array('DELETE'),
-            array('PATCH'),
-        );
+        return [
+            ['POST'],
+            ['PUT'],
+            ['DELETE'],
+            ['PATCH'],
+        ];
     }
 
     /**
@@ -598,26 +598,26 @@ class CompoundFormTest extends AbstractFormTest
         $path = tempnam(sys_get_temp_dir(), 'sf');
         touch($path);
         file_put_contents($path, 'zaza');
-        $values = array(
-            'author' => array(
+        $values = [
+            'author' => [
                 'name' => 'Bernhard',
-                'image' => array('filename' => 'foobar.png'),
-            ),
-        );
+                'image' => ['filename' => 'foobar.png'],
+            ],
+        ];
 
-        $files = array(
-            'author' => array(
-                'error' => array('image' => UPLOAD_ERR_OK),
-                'name' => array('image' => 'upload.png'),
-                'size' => array('image' => null),
-                'tmp_name' => array('image' => $path),
-                'type' => array('image' => 'image/png'),
-            ),
-        );
+        $files = [
+            'author' => [
+                'error' => ['image' => UPLOAD_ERR_OK],
+                'name' => ['image' => 'upload.png'],
+                'size' => ['image' => null],
+                'tmp_name' => ['image' => $path],
+                'type' => ['image' => 'image/png'],
+            ],
+        ];
 
-        $request = new Request(array(), $values, array(), array(), $files, array(
+        $request = new Request([], $values, [], [], $files, [
             'REQUEST_METHOD' => $method,
-        ));
+        ]);
 
         $form = $this->getBuilder('author')
             ->setMethod($method)
@@ -647,24 +647,24 @@ class CompoundFormTest extends AbstractFormTest
         touch($path);
         file_put_contents($path, 'zaza');
 
-        $values = array(
+        $values = [
             'name' => 'Bernhard',
             'extra' => 'data',
-        );
+        ];
 
-        $files = array(
-            'image' => array(
+        $files = [
+            'image' => [
                 'error' => UPLOAD_ERR_OK,
                 'name' => 'upload.png',
                 'size' => null,
                 'tmp_name' => $path,
                 'type' => 'image/png',
-            ),
-        );
+            ],
+        ];
 
-        $request = new Request(array(), $values, array(), array(), $files, array(
+        $request = new Request([], $values, [], [], $files, [
             'REQUEST_METHOD' => $method,
-        ));
+        ]);
 
         $form = $this->getBuilder('')
             ->setMethod($method)
@@ -681,7 +681,7 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->assertEquals('Bernhard', $form['name']->getData());
         $this->assertEquals($file, $form['image']->getData());
-        $this->assertEquals(array('extra' => 'data'), $form->getExtraData());
+        $this->assertEquals(['extra' => 'data'], $form->getExtraData());
 
         unlink($path);
     }
@@ -695,21 +695,21 @@ class CompoundFormTest extends AbstractFormTest
         touch($path);
         file_put_contents($path, 'zaza');
 
-        $files = array(
-            'image' => array(
+        $files = [
+            'image' => [
                 'error' => UPLOAD_ERR_OK,
                 'name' => 'upload.png',
                 'size' => null,
                 'tmp_name' => $path,
                 'type' => 'image/png',
-            ),
-        );
+            ],
+        ];
 
-        $request = new Request(array(), array(), array(), array(), $files, array(
+        $request = new Request([], [], [], [], $files, [
             'REQUEST_METHOD' => $method,
-        ));
+        ]);
 
-        $form = $this->getBuilder('image', null, null, array('allow_file_upload' => true))
+        $form = $this->getBuilder('image', null, null, ['allow_file_upload' => true])
             ->setMethod($method)
             ->setRequestHandler(new HttpFoundationRequestHandler())
             ->getForm();
@@ -732,13 +732,13 @@ class CompoundFormTest extends AbstractFormTest
         touch($path);
         file_put_contents($path, 'zaza');
 
-        $values = array(
+        $values = [
             'name' => 'Bernhard',
-        );
+        ];
 
-        $request = new Request(array(), $values, array(), array(), array(), array(
+        $request = new Request([], $values, [], [], [], [
             'REQUEST_METHOD' => $method,
-        ));
+        ]);
 
         $form = $this->getBuilder('name')
             ->setMethod($method)
@@ -754,16 +754,16 @@ class CompoundFormTest extends AbstractFormTest
 
     public function testSubmitGetRequest()
     {
-        $values = array(
-            'author' => array(
+        $values = [
+            'author' => [
                 'firstName' => 'Bernhard',
                 'lastName' => 'Schussek',
-            ),
-        );
+            ],
+        ];
 
-        $request = new Request($values, array(), array(), array(), array(), array(
+        $request = new Request($values, [], [], [], [], [
             'REQUEST_METHOD' => 'GET',
-        ));
+        ]);
 
         $form = $this->getBuilder('author')
             ->setMethod('GET')
@@ -782,15 +782,15 @@ class CompoundFormTest extends AbstractFormTest
 
     public function testSubmitGetRequestWithEmptyRootFormName()
     {
-        $values = array(
+        $values = [
             'firstName' => 'Bernhard',
             'lastName' => 'Schussek',
             'extra' => 'data',
-        );
+        ];
 
-        $request = new Request($values, array(), array(), array(), array(), array(
+        $request = new Request($values, [], [], [], [], [
             'REQUEST_METHOD' => 'GET',
-        ));
+        ]);
 
         $form = $this->getBuilder('')
             ->setMethod('GET')
@@ -805,7 +805,7 @@ class CompoundFormTest extends AbstractFormTest
 
         $this->assertEquals('Bernhard', $form['firstName']->getData());
         $this->assertEquals('Schussek', $form['lastName']->getData());
-        $this->assertEquals(array('extra' => 'data'), $form->getExtraData());
+        $this->assertEquals(['extra' => 'data'], $form->getExtraData());
     }
 
     public function testGetErrors()
@@ -821,7 +821,7 @@ class CompoundFormTest extends AbstractFormTest
              (string) $errors
         );
 
-        $this->assertSame(array($error1, $error2), iterator_to_array($errors));
+        $this->assertSame([$error1, $error2], iterator_to_array($errors));
     }
 
     public function testGetErrorsDeep()
@@ -843,7 +843,7 @@ class CompoundFormTest extends AbstractFormTest
         );
 
         $this->assertSame(
-             array($error1, $error2, $nestedError),
+             [$error1, $error2, $nestedError],
              iterator_to_array($errors)
         );
     }
@@ -925,7 +925,7 @@ class CompoundFormTest extends AbstractFormTest
     public function testCreateViewWithChildren()
     {
         $type = $this->getMockBuilder('Symfony\Component\Form\ResolvedFormTypeInterface')->getMock();
-        $options = array('a' => 'Foo', 'b' => 'Bar');
+        $options = ['a' => 'Foo', 'b' => 'Bar'];
         $field1 = $this->getMockForm('foo');
         $field2 = $this->getMockForm('bar');
         $view = new FormView();
@@ -955,7 +955,7 @@ class CompoundFormTest extends AbstractFormTest
         $type->expects($this->once())
             ->method('buildView')
             ->with($view, $this->form, $options)
-            ->will($this->returnCallback($assertChildViewsEqual(array())));
+            ->will($this->returnCallback($assertChildViewsEqual([])));
 
         // Then add the first child form
         $field1->expects($this->once())
@@ -972,7 +972,7 @@ class CompoundFormTest extends AbstractFormTest
         $type->expects($this->once())
             ->method('finishView')
             ->with($view, $this->form, $options)
-            ->will($this->returnCallback($assertChildViewsEqual(array('foo' => $field1View, 'bar' => $field2View))));
+            ->will($this->returnCallback($assertChildViewsEqual(['foo' => $field1View, 'bar' => $field2View])));
 
         $this->assertSame($view, $this->form->createView());
     }
@@ -985,8 +985,8 @@ class CompoundFormTest extends AbstractFormTest
     public function testNoClickedButton()
     {
         $button = $this->getMockBuilder('Symfony\Component\Form\SubmitButton')
-            ->setConstructorArgs(array(new SubmitButtonBuilder('submit')))
-            ->setMethods(array('isClicked'))
+            ->setConstructorArgs([new SubmitButtonBuilder('submit')])
+            ->setMethods(['isClicked'])
             ->getMock();
 
         $button->expects($this->any())
@@ -999,7 +999,7 @@ class CompoundFormTest extends AbstractFormTest
         $this->form->setParent($parentForm);
         $this->form->add($button);
         $this->form->add($nestedForm);
-        $this->form->submit(array());
+        $this->form->submit([]);
 
         $this->assertNull($this->form->getClickedButton());
     }
@@ -1007,8 +1007,8 @@ class CompoundFormTest extends AbstractFormTest
     public function testClickedButton()
     {
         $button = $this->getMockBuilder('Symfony\Component\Form\SubmitButton')
-            ->setConstructorArgs(array(new SubmitButtonBuilder('submit')))
-            ->setMethods(array('isClicked'))
+            ->setConstructorArgs([new SubmitButtonBuilder('submit')])
+            ->setMethods(['isClicked'])
             ->getMock();
 
         $button->expects($this->any())
@@ -1016,7 +1016,7 @@ class CompoundFormTest extends AbstractFormTest
             ->will($this->returnValue(true));
 
         $this->form->add($button);
-        $this->form->submit(array());
+        $this->form->submit([]);
 
         $this->assertSame($button, $this->form->getClickedButton());
     }
@@ -1026,8 +1026,8 @@ class CompoundFormTest extends AbstractFormTest
         $button = $this->getBuilder('submit')->getForm();
 
         $nestedForm = $this->getMockBuilder('Symfony\Component\Form\Form')
-            ->setConstructorArgs(array($this->getBuilder('nested')))
-            ->setMethods(array('getClickedButton'))
+            ->setConstructorArgs([$this->getBuilder('nested')])
+            ->setMethods(['getClickedButton'])
             ->getMock();
 
         $nestedForm->expects($this->any())
@@ -1035,7 +1035,7 @@ class CompoundFormTest extends AbstractFormTest
             ->will($this->returnValue($button));
 
         $this->form->add($nestedForm);
-        $this->form->submit(array());
+        $this->form->submit([]);
 
         $this->assertSame($button, $this->form->getClickedButton());
     }
@@ -1045,8 +1045,8 @@ class CompoundFormTest extends AbstractFormTest
         $button = $this->getBuilder('submit')->getForm();
 
         $parentForm = $this->getMockBuilder('Symfony\Component\Form\Form')
-            ->setConstructorArgs(array($this->getBuilder('parent')))
-            ->setMethods(array('getClickedButton'))
+            ->setConstructorArgs([$this->getBuilder('parent')])
+            ->setMethods(['getClickedButton'])
             ->getMock();
 
         $parentForm->expects($this->any())
@@ -1054,7 +1054,7 @@ class CompoundFormTest extends AbstractFormTest
             ->will($this->returnValue($button));
 
         $this->form->setParent($parentForm);
-        $this->form->submit(array());
+        $this->form->submit([]);
 
         $this->assertSame($button, $this->form->getClickedButton());
     }
@@ -1071,10 +1071,10 @@ class CompoundFormTest extends AbstractFormTest
             ->add($submit)
         ;
 
-        $form->submit(array(
+        $form->submit([
             'text' => '',
             'submit' => '',
-        ));
+        ]);
 
         $this->assertTrue($submit->isDisabled());
         $this->assertFalse($submit->isClicked());
@@ -1084,17 +1084,17 @@ class CompoundFormTest extends AbstractFormTest
     public function testArrayTransformationFailureOnSubmit()
     {
         $this->form->add($this->getBuilder('foo')->setCompound(false)->getForm());
-        $this->form->add($this->getBuilder('bar', null, null, array('multiple' => false))->setCompound(false)->getForm());
+        $this->form->add($this->getBuilder('bar', null, null, ['multiple' => false])->setCompound(false)->getForm());
 
-        $this->form->submit(array(
-            'foo' => array('foo'),
-            'bar' => array('bar'),
-        ));
+        $this->form->submit([
+            'foo' => ['foo'],
+            'bar' => ['bar'],
+        ]);
 
         $this->assertNull($this->form->get('foo')->getData());
         $this->assertSame('Submitted data was expected to be text or number, array given.', $this->form->get('foo')->getTransformationFailure()->getMessage());
 
-        $this->assertSame(array('bar'), $this->form->get('bar')->getData());
+        $this->assertSame(['bar'], $this->form->get('bar')->getData());
     }
 
     public function testFileUpload()
@@ -1103,10 +1103,10 @@ class CompoundFormTest extends AbstractFormTest
         $this->form->add($this->getBuilder('foo')->setRequestHandler($reqHandler)->getForm());
         $this->form->add($this->getBuilder('bar')->setRequestHandler($reqHandler)->getForm());
 
-        $this->form->submit(array(
+        $this->form->submit([
             'foo' => 'Foo',
             'bar' => new UploadedFile(__FILE__, 'upload.png', 'image/png', UPLOAD_ERR_OK),
-        ));
+        ]);
 
         $this->assertSame('Submitted data was expected to be text or number, file upload given.', $this->form->get('bar')->getTransformationFailure()->getMessage());
         $this->assertNull($this->form->get('bar')->getData());
diff --git a/src/Symfony/Component/Form/Tests/Console/Descriptor/AbstractDescriptorTest.php b/src/Symfony/Component/Form/Tests/Console/Descriptor/AbstractDescriptorTest.php
index 37831608a5..2ace5eef37 100644
--- a/src/Symfony/Component/Form/Tests/Console/Descriptor/AbstractDescriptorTest.php
+++ b/src/Symfony/Component/Form/Tests/Console/Descriptor/AbstractDescriptorTest.php
@@ -69,28 +69,28 @@ abstract class AbstractDescriptorTest extends TestCase
 
     public function getDescribeDefaultsTestData()
     {
-        $options['core_types'] = array('Symfony\Component\Form\Extension\Core\Type\FormType');
-        $options['service_types'] = array('Symfony\Bridge\Doctrine\Form\Type\EntityType');
-        $options['extensions'] = array('Symfony\Component\Form\Extension\Csrf\Type\FormTypeCsrfExtension');
-        $options['guessers'] = array('Symfony\Component\Form\Extension\Validator\ValidatorTypeGuesser');
+        $options['core_types'] = ['Symfony\Component\Form\Extension\Core\Type\FormType'];
+        $options['service_types'] = ['Symfony\Bridge\Doctrine\Form\Type\EntityType'];
+        $options['extensions'] = ['Symfony\Component\Form\Extension\Csrf\Type\FormTypeCsrfExtension'];
+        $options['guessers'] = ['Symfony\Component\Form\Extension\Validator\ValidatorTypeGuesser'];
         $options['decorated'] = false;
         $options['show_deprecated'] = false;
-        yield array(null, $options, 'defaults_1');
+        yield [null, $options, 'defaults_1'];
 
-        $options['core_types'] = array();
-        $options['service_types'] = array(FooType::class);
+        $options['core_types'] = [];
+        $options['service_types'] = [FooType::class];
         $options['show_deprecated'] = true;
-        yield array(null, $options, 'types_with_deprecated_options');
+        yield [null, $options, 'types_with_deprecated_options'];
     }
 
     public function getDescribeResolvedFormTypeTestData()
     {
-        $typeExtensions = array(new FormTypeCsrfExtension(new CsrfTokenManager()));
+        $typeExtensions = [new FormTypeCsrfExtension(new CsrfTokenManager())];
         $parent = new ResolvedFormType(new FormType(), $typeExtensions);
 
-        yield array(new ResolvedFormType(new ChoiceType(), array(), $parent), array('decorated' => false, 'show_deprecated' => false), 'resolved_form_type_1');
-        yield array(new ResolvedFormType(new FormType()), array('decorated' => false, 'show_deprecated' => false), 'resolved_form_type_2');
-        yield array(new ResolvedFormType(new FooType(), array(), $parent), array('decorated' => false, 'show_deprecated' => true), 'deprecated_options_of_type');
+        yield [new ResolvedFormType(new ChoiceType(), [], $parent), ['decorated' => false, 'show_deprecated' => false], 'resolved_form_type_1'];
+        yield [new ResolvedFormType(new FormType()), ['decorated' => false, 'show_deprecated' => false], 'resolved_form_type_2'];
+        yield [new ResolvedFormType(new FooType(), [], $parent), ['decorated' => false, 'show_deprecated' => true], 'deprecated_options_of_type'];
     }
 
     public function getDescribeOptionTestData()
@@ -99,24 +99,24 @@ abstract class AbstractDescriptorTest extends TestCase
         $options['decorated'] = false;
         $options['show_deprecated'] = false;
 
-        $resolvedType = new ResolvedFormType(new ChoiceType(), array(), $parent);
+        $resolvedType = new ResolvedFormType(new ChoiceType(), [], $parent);
         $options['type'] = $resolvedType->getInnerType();
         $options['option'] = 'choice_translation_domain';
-        yield array($resolvedType->getOptionsResolver(), $options, 'default_option_with_normalizer');
+        yield [$resolvedType->getOptionsResolver(), $options, 'default_option_with_normalizer'];
 
-        $resolvedType = new ResolvedFormType(new FooType(), array(), $parent);
+        $resolvedType = new ResolvedFormType(new FooType(), [], $parent);
         $options['type'] = $resolvedType->getInnerType();
         $options['option'] = 'foo';
-        yield array($resolvedType->getOptionsResolver(), $options, 'required_option_with_allowed_values');
+        yield [$resolvedType->getOptionsResolver(), $options, 'required_option_with_allowed_values'];
 
         $options['option'] = 'empty_data';
-        yield array($resolvedType->getOptionsResolver(), $options, 'overridden_option_with_default_closures');
+        yield [$resolvedType->getOptionsResolver(), $options, 'overridden_option_with_default_closures'];
 
-        $resolvedType = new ResolvedFormType(new FooType(), array(), $parent);
+        $resolvedType = new ResolvedFormType(new FooType(), [], $parent);
         $options['type'] = $resolvedType->getInnerType();
         $options['option'] = 'bar';
         $options['show_deprecated'] = true;
-        yield array($resolvedType->getOptionsResolver(), $options, 'deprecated_option');
+        yield [$resolvedType->getOptionsResolver(), $options, 'deprecated_option'];
     }
 
     abstract protected function getDescriptor();
@@ -126,7 +126,7 @@ abstract class AbstractDescriptorTest extends TestCase
     private function getObjectDescription($object, array $options)
     {
         $output = new BufferedOutput(BufferedOutput::VERBOSITY_NORMAL, $options['decorated']);
-        $io = new SymfonyStyle(new ArrayInput(array()), $output);
+        $io = new SymfonyStyle(new ArrayInput([]), $output);
 
         $this->getDescriptor()->describe($io, $object, $options);
 
@@ -155,11 +155,11 @@ class FooType extends AbstractType
             $foo = $options['foo'];
 
             return function (FormInterface $form) use ($foo) {
-                return $form->getConfig()->getCompound() ? array($foo) : $foo;
+                return $form->getConfig()->getCompound() ? [$foo] : $foo;
             };
         });
         $resolver->setAllowedTypes('foo', 'string');
-        $resolver->setAllowedValues('foo', array('bar', 'baz'));
+        $resolver->setAllowedValues('foo', ['bar', 'baz']);
         $resolver->setNormalizer('foo', function (Options $options, $value) {
             return (string) $value;
         });
diff --git a/src/Symfony/Component/Form/Tests/DependencyInjection/FormPassTest.php b/src/Symfony/Component/Form/Tests/DependencyInjection/FormPassTest.php
index debbddfdb3..1b202b5df1 100644
--- a/src/Symfony/Component/Form/Tests/DependencyInjection/FormPassTest.php
+++ b/src/Symfony/Component/Form/Tests/DependencyInjection/FormPassTest.php
@@ -59,10 +59,10 @@ class FormPassTest extends TestCase
         $extDefinition = $container->getDefinition('form.extension');
 
         $this->assertEquals(
-            (new Definition(ServiceLocator::class, array(array(
+            (new Definition(ServiceLocator::class, [[
                 __CLASS__.'_Type1' => new ServiceClosureArgument(new Reference('my.type1')),
                 __CLASS__.'_Type2' => new ServiceClosureArgument(new Reference('my.type2')),
-            ))))->addTag('container.service_locator')->setPublic(false),
+            ]]))->addTag('container.service_locator')->setPublic(false),
             $extDefinition->getArgument(0)
         );
     }
@@ -81,10 +81,10 @@ class FormPassTest extends TestCase
         $cmdDefinition = $container->getDefinition('console.command.form_debug');
 
         $this->assertEquals(
-            array(
+            [
                 'Symfony\Component\Form\Extension\Core\Type',
                 __NAMESPACE__,
-            ),
+            ],
             $cmdDefinition->getArgument(1)
         );
     }
@@ -110,83 +110,83 @@ class FormPassTest extends TestCase
 
     public function addTaggedTypeExtensionsDataProvider()
     {
-        return array(
-            array(
-                array(
-                    Type1TypeExtension::class => array(
+        return [
+            [
+                [
+                    Type1TypeExtension::class => [
                         'class' => Type1TypeExtension::class,
-                        'tag' => array('extended_type' => 'type1'),
-                    ),
-                    Type1Type2TypeExtension::class => array(
+                        'tag' => ['extended_type' => 'type1'],
+                    ],
+                    Type1Type2TypeExtension::class => [
                         'class' => Type1Type2TypeExtension::class,
-                        'tag' => array('extended_type' => 'type2'),
-                    ),
-                ),
-                array(
-                    'type1' => new IteratorArgument(array(new Reference(Type1TypeExtension::class))),
-                    'type2' => new IteratorArgument(array(new Reference(Type1Type2TypeExtension::class))),
-                ),
-            ),
-            array(
-                array(
-                    Type1TypeExtension::class => array(
+                        'tag' => ['extended_type' => 'type2'],
+                    ],
+                ],
+                [
+                    'type1' => new IteratorArgument([new Reference(Type1TypeExtension::class)]),
+                    'type2' => new IteratorArgument([new Reference(Type1Type2TypeExtension::class)]),
+                ],
+            ],
+            [
+                [
+                    Type1TypeExtension::class => [
                         'class' => Type1TypeExtension::class,
-                        'tag' => array(),
-                    ),
-                    Type1Type2TypeExtension::class => array(
+                        'tag' => [],
+                    ],
+                    Type1Type2TypeExtension::class => [
                         'class' => Type1Type2TypeExtension::class,
-                        'tag' => array(),
-                    ),
-                ),
-                array(
-                    'type1' => new IteratorArgument(array(
+                        'tag' => [],
+                    ],
+                ],
+                [
+                    'type1' => new IteratorArgument([
                         new Reference(Type1TypeExtension::class),
                         new Reference(Type1Type2TypeExtension::class),
-                    )),
-                    'type2' => new IteratorArgument(array(new Reference(Type1Type2TypeExtension::class))),
-                ),
-            ),
-            array(
-                array(
-                    'my.type_extension1' => array(
+                    ]),
+                    'type2' => new IteratorArgument([new Reference(Type1Type2TypeExtension::class)]),
+                ],
+            ],
+            [
+                [
+                    'my.type_extension1' => [
                         'class' => Type1TypeExtension::class,
-                        'tag' => array('extended_type' => 'type1', 'priority' => 1),
-                    ),
-                    'my.type_extension2' => array(
+                        'tag' => ['extended_type' => 'type1', 'priority' => 1],
+                    ],
+                    'my.type_extension2' => [
                         'class' => Type1TypeExtension::class,
-                        'tag' => array('extended_type' => 'type1', 'priority' => 2),
-                    ),
-                    'my.type_extension3' => array(
+                        'tag' => ['extended_type' => 'type1', 'priority' => 2],
+                    ],
+                    'my.type_extension3' => [
                         'class' => Type1TypeExtension::class,
-                        'tag' => array('extended_type' => 'type1', 'priority' => -1),
-                    ),
-                    'my.type_extension4' => array(
+                        'tag' => ['extended_type' => 'type1', 'priority' => -1],
+                    ],
+                    'my.type_extension4' => [
                         'class' => Type2TypeExtension::class,
-                        'tag' => array('extended_type' => 'type2', 'priority' => 2),
-                    ),
-                    'my.type_extension5' => array(
+                        'tag' => ['extended_type' => 'type2', 'priority' => 2],
+                    ],
+                    'my.type_extension5' => [
                         'class' => Type2TypeExtension::class,
-                        'tag' => array('extended_type' => 'type2', 'priority' => 1),
-                    ),
-                    'my.type_extension6' => array(
+                        'tag' => ['extended_type' => 'type2', 'priority' => 1],
+                    ],
+                    'my.type_extension6' => [
                         'class' => Type2TypeExtension::class,
-                        'tag' => array('extended_type' => 'type2', 'priority' => 1),
-                    ),
-                ),
-                array(
-                    'type1' => new IteratorArgument(array(
+                        'tag' => ['extended_type' => 'type2', 'priority' => 1],
+                    ],
+                ],
+                [
+                    'type1' => new IteratorArgument([
                         new Reference('my.type_extension2'),
                         new Reference('my.type_extension1'),
                         new Reference('my.type_extension3'),
-                    )),
-                    'type2' => new IteratorArgument(array(
+                    ]),
+                    'type2' => new IteratorArgument([
                         new Reference('my.type_extension4'),
                         new Reference('my.type_extension5'),
                         new Reference('my.type_extension6'),
-                    )),
-                ),
-            ),
-        );
+                    ]),
+                ],
+            ],
+        ];
     }
 
     /**
@@ -214,44 +214,44 @@ class FormPassTest extends TestCase
      */
     public function addLegacyTaggedTypeExtensionsDataProvider()
     {
-        return array(
-            array(
-                array(
-                    'my.type_extension1' => array('extended_type' => 'type1'),
-                    'my.type_extension2' => array('extended_type' => 'type1'),
-                    'my.type_extension3' => array('extended_type' => 'type2'),
-                ),
-                array(
-                    'type1' => new IteratorArgument(array(
+        return [
+            [
+                [
+                    'my.type_extension1' => ['extended_type' => 'type1'],
+                    'my.type_extension2' => ['extended_type' => 'type1'],
+                    'my.type_extension3' => ['extended_type' => 'type2'],
+                ],
+                [
+                    'type1' => new IteratorArgument([
                         new Reference('my.type_extension1'),
                         new Reference('my.type_extension2'),
-                    )),
-                    'type2' => new IteratorArgument(array(new Reference('my.type_extension3'))),
-                ),
-            ),
-            array(
-                array(
-                    'my.type_extension1' => array('extended_type' => 'type1', 'priority' => 1),
-                    'my.type_extension2' => array('extended_type' => 'type1', 'priority' => 2),
-                    'my.type_extension3' => array('extended_type' => 'type1', 'priority' => -1),
-                    'my.type_extension4' => array('extended_type' => 'type2', 'priority' => 2),
-                    'my.type_extension5' => array('extended_type' => 'type2', 'priority' => 1),
-                    'my.type_extension6' => array('extended_type' => 'type2', 'priority' => 1),
-                ),
-                array(
-                    'type1' => new IteratorArgument(array(
+                    ]),
+                    'type2' => new IteratorArgument([new Reference('my.type_extension3')]),
+                ],
+            ],
+            [
+                [
+                    'my.type_extension1' => ['extended_type' => 'type1', 'priority' => 1],
+                    'my.type_extension2' => ['extended_type' => 'type1', 'priority' => 2],
+                    'my.type_extension3' => ['extended_type' => 'type1', 'priority' => -1],
+                    'my.type_extension4' => ['extended_type' => 'type2', 'priority' => 2],
+                    'my.type_extension5' => ['extended_type' => 'type2', 'priority' => 1],
+                    'my.type_extension6' => ['extended_type' => 'type2', 'priority' => 1],
+                ],
+                [
+                    'type1' => new IteratorArgument([
                         new Reference('my.type_extension2'),
                         new Reference('my.type_extension1'),
                         new Reference('my.type_extension3'),
-                    )),
-                    'type2' => new IteratorArgument(array(
+                    ]),
+                    'type2' => new IteratorArgument([
                         new Reference('my.type_extension4'),
                         new Reference('my.type_extension5'),
                         new Reference('my.type_extension6'),
-                    )),
-                ),
-            ),
-        );
+                    ]),
+                ],
+            ],
+        ];
     }
 
     /**
@@ -304,10 +304,10 @@ class FormPassTest extends TestCase
         $extDefinition = $container->getDefinition('form.extension');
 
         $this->assertEquals(
-            new IteratorArgument(array(
+            new IteratorArgument([
                 new Reference('my.guesser1'),
                 new Reference('my.guesser2'),
-            )),
+            ]),
             $extDefinition->getArgument(2)
         );
     }
@@ -315,7 +315,7 @@ class FormPassTest extends TestCase
     /**
      * @dataProvider privateTaggedServicesProvider
      */
-    public function testPrivateTaggedServices($id, $class, $tagName, callable $assertion, array $tagAttributes = array())
+    public function testPrivateTaggedServices($id, $class, $tagName, callable $assertion, array $tagAttributes = [])
     {
         $formPass = new FormPass();
         $container = new ContainerBuilder();
@@ -329,8 +329,8 @@ class FormPassTest extends TestCase
 
     public function privateTaggedServicesProvider()
     {
-        return array(
-            array(
+        return [
+            [
                 'my.type',
                 'stdClass',
                 'form.type',
@@ -340,41 +340,41 @@ class FormPassTest extends TestCase
                     $this->assertInstanceOf(Reference::class, $formTypes);
 
                     $locator = $container->getDefinition((string) $formTypes);
-                    $expectedLocatorMap = array(
+                    $expectedLocatorMap = [
                         'stdClass' => new ServiceClosureArgument(new Reference('my.type')),
-                    );
+                    ];
 
                     $this->assertInstanceOf(Definition::class, $locator);
                     $this->assertEquals($expectedLocatorMap, $locator->getArgument(0));
                 },
-            ),
-            array(
+            ],
+            [
                 'my.type_extension',
                 Type1TypeExtension::class,
                 'form.type_extension',
                 function (ContainerBuilder $container) {
                     $this->assertEquals(
-                        array('Symfony\Component\Form\Extension\Core\Type\FormType' => new IteratorArgument(array(new Reference('my.type_extension')))),
+                        ['Symfony\Component\Form\Extension\Core\Type\FormType' => new IteratorArgument([new Reference('my.type_extension')])],
                         $container->getDefinition('form.extension')->getArgument(1)
                     );
                 },
-                array('extended_type' => 'Symfony\Component\Form\Extension\Core\Type\FormType'),
-            ),
-            array('my.guesser', 'stdClass', 'form.type_guesser', function (ContainerBuilder $container) {
-                $this->assertEquals(new IteratorArgument(array(new Reference('my.guesser'))), $container->getDefinition('form.extension')->getArgument(2));
-            }),
-        );
+                ['extended_type' => 'Symfony\Component\Form\Extension\Core\Type\FormType'],
+            ],
+            ['my.guesser', 'stdClass', 'form.type_guesser', function (ContainerBuilder $container) {
+                $this->assertEquals(new IteratorArgument([new Reference('my.guesser')]), $container->getDefinition('form.extension')->getArgument(2));
+            }],
+        ];
     }
 
     private function createExtensionDefinition()
     {
         $definition = new Definition('Symfony\Component\Form\Extension\DependencyInjection\DependencyInjectionExtension');
         $definition->setPublic(true);
-        $definition->setArguments(array(
-            array(),
-            array(),
-            new IteratorArgument(array()),
-        ));
+        $definition->setArguments([
+            [],
+            [],
+            new IteratorArgument([]),
+        ]);
 
         return $definition;
     }
@@ -383,11 +383,11 @@ class FormPassTest extends TestCase
     {
         $definition = new Definition('Symfony\Component\Form\Command\DebugCommand');
         $definition->setPublic(true);
-        $definition->setArguments(array(
+        $definition->setArguments([
             $formRegistry = $this->getMockBuilder(FormRegistryInterface::class)->getMock(),
-            array(),
-            array('Symfony\Component\Form\Extension\Core\Type'),
-        ));
+            [],
+            ['Symfony\Component\Form\Extension\Core\Type'],
+        ]);
 
         return $definition;
     }
@@ -413,7 +413,7 @@ class Type1TypeExtension extends AbstractTypeExtension
 {
     public static function getExtendedTypes(): iterable
     {
-        return array('type1');
+        return ['type1'];
     }
 }
 
@@ -421,7 +421,7 @@ class Type2TypeExtension extends AbstractTypeExtension
 {
     public static function getExtendedTypes(): iterable
     {
-        return array('type2');
+        return ['type2'];
     }
 }
 
@@ -438,6 +438,6 @@ class WithoutExtendedTypesTypeExtension extends AbstractTypeExtension
 {
     public static function getExtendedTypes(): iterable
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
index da206ba857..e96162d642 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataMapper/PropertyPathMapperTest.php
@@ -46,8 +46,8 @@ class PropertyPathMapperTest extends TestCase
     private function getPropertyPath($path)
     {
         return $this->getMockBuilder('Symfony\Component\PropertyAccess\PropertyPath')
-            ->setConstructorArgs(array($path))
-            ->setMethods(array('getValue', 'setValue'))
+            ->setConstructorArgs([$path])
+            ->setMethods(['getValue', 'setValue'])
             ->getMock();
     }
 
@@ -57,8 +57,8 @@ class PropertyPathMapperTest extends TestCase
     private function getForm(FormConfigInterface $config, bool $synchronized = true, bool $submitted = true)
     {
         $form = $this->getMockBuilder('Symfony\Component\Form\Form')
-            ->setConstructorArgs(array($config))
-            ->setMethods(array('isSynchronized', 'isSubmitted'))
+            ->setConstructorArgs([$config])
+            ->setMethods(['isSynchronized', 'isSubmitted'])
             ->getMock();
 
         $form->expects($this->any())
@@ -88,7 +88,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setPropertyPath($propertyPath);
         $form = $this->getForm($config);
 
-        $this->mapper->mapDataToForms($car, array($form));
+        $this->mapper->mapDataToForms($car, [$form]);
 
         // Can't use isIdentical() above because mocks always clone their
         // arguments which can't be disabled in PHPUnit 3.6
@@ -111,7 +111,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setPropertyPath($propertyPath);
         $form = $this->getForm($config);
 
-        $this->mapper->mapDataToForms($car, array($form));
+        $this->mapper->mapDataToForms($car, [$form]);
 
         $this->assertNotSame($engine, $form->getData());
         $this->assertEquals($engine, $form->getData());
@@ -127,7 +127,7 @@ class PropertyPathMapperTest extends TestCase
 
         $this->assertNull($form->getPropertyPath());
 
-        $this->mapper->mapDataToForms($car, array($form));
+        $this->mapper->mapDataToForms($car, [$form]);
 
         $this->assertNull($form->getData());
     }
@@ -146,7 +146,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setPropertyPath($propertyPath);
         $form = $this->getForm($config);
 
-        $this->mapper->mapDataToForms($car, array($form));
+        $this->mapper->mapDataToForms($car, [$form]);
 
         $this->assertNull($form->getData());
     }
@@ -165,15 +165,15 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($default);
 
         $form = $this->getMockBuilder('Symfony\Component\Form\Form')
-            ->setConstructorArgs(array($config))
-            ->setMethods(array('setData'))
+            ->setConstructorArgs([$config])
+            ->setMethods(['setData'])
             ->getMock();
 
         $form->expects($this->once())
             ->method('setData')
             ->with($default);
 
-        $this->mapper->mapDataToForms(null, array($form));
+        $this->mapper->mapDataToForms(null, [$form]);
     }
 
     public function testMapDataToFormsSetsDefaultDataIfPassedDataIsEmptyArray()
@@ -190,15 +190,15 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($default);
 
         $form = $this->getMockBuilder('Symfony\Component\Form\Form')
-            ->setConstructorArgs(array($config))
-            ->setMethods(array('setData'))
+            ->setConstructorArgs([$config])
+            ->setMethods(['setData'])
             ->getMock();
 
         $form->expects($this->once())
             ->method('setData')
             ->with($default);
 
-        $this->mapper->mapDataToForms(array(), array($form));
+        $this->mapper->mapDataToForms([], [$form]);
     }
 
     public function testMapFormsToDataWritesBackIfNotByReference()
@@ -217,7 +217,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($engine);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataWritesBackIfByReferenceButNoReference()
@@ -236,7 +236,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($engine);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataWritesBackIfByReferenceAndReference()
@@ -260,7 +260,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($engine);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataIgnoresUnmapped()
@@ -279,7 +279,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setMapped(false);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataIgnoresUnsubmittedForms()
@@ -297,7 +297,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($engine);
         $form = $this->getForm($config, true, false);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataIgnoresEmptyData()
@@ -314,7 +314,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData(null);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataIgnoresUnsynchronized()
@@ -332,7 +332,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($engine);
         $form = $this->getForm($config, false);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     public function testMapFormsToDataIgnoresDisabled()
@@ -351,7 +351,7 @@ class PropertyPathMapperTest extends TestCase
         $config->setDisabled(true);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $car);
+        $this->mapper->mapFormsToData([$form], $car);
     }
 
     /**
@@ -359,7 +359,7 @@ class PropertyPathMapperTest extends TestCase
      */
     public function testMapFormsToDataDoesNotChangeEqualDateTimeInstance($date)
     {
-        $article = array();
+        $article = [];
         $publishedAt = $date;
         $article['publishedAt'] = clone $publishedAt;
         $propertyPath = $this->getPropertyPath('[publishedAt]');
@@ -378,14 +378,14 @@ class PropertyPathMapperTest extends TestCase
         $config->setData($publishedAt);
         $form = $this->getForm($config);
 
-        $this->mapper->mapFormsToData(array($form), $article);
+        $this->mapper->mapFormsToData([$form], $article);
     }
 
     public function provideDate()
     {
-        return array(
-            array(new \DateTime()),
-            array(new \DateTimeImmutable()),
-        );
+        return [
+            [new \DateTime()],
+            [new \DateTimeImmutable()],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
index 220a367655..4f11c7f796 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ArrayToPartsTransformerTest.php
@@ -20,10 +20,10 @@ class ArrayToPartsTransformerTest extends TestCase
 
     protected function setUp()
     {
-        $this->transformer = new ArrayToPartsTransformer(array(
-            'first' => array('a', 'b', 'c'),
-            'second' => array('d', 'e', 'f'),
-        ));
+        $this->transformer = new ArrayToPartsTransformer([
+            'first' => ['a', 'b', 'c'],
+            'second' => ['d', 'e', 'f'],
+        ]);
     }
 
     protected function tearDown()
@@ -33,37 +33,37 @@ class ArrayToPartsTransformerTest extends TestCase
 
     public function testTransform()
     {
-        $input = array(
+        $input = [
             'a' => '1',
             'b' => '2',
             'c' => '3',
             'd' => '4',
             'e' => '5',
             'f' => '6',
-        );
+        ];
 
-        $output = array(
-            'first' => array(
+        $output = [
+            'first' => [
                 'a' => '1',
                 'b' => '2',
                 'c' => '3',
-            ),
-            'second' => array(
+            ],
+            'second' => [
                 'd' => '4',
                 'e' => '5',
                 'f' => '6',
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($output, $this->transformer->transform($input));
     }
 
     public function testTransformEmpty()
     {
-        $output = array(
+        $output = [
             'first' => null,
             'second' => null,
-        );
+        ];
 
         $this->assertSame($output, $this->transformer->transform(null));
     }
@@ -78,47 +78,47 @@ class ArrayToPartsTransformerTest extends TestCase
 
     public function testReverseTransform()
     {
-        $input = array(
-            'first' => array(
+        $input = [
+            'first' => [
                 'a' => '1',
                 'b' => '2',
                 'c' => '3',
-            ),
-            'second' => array(
+            ],
+            'second' => [
                 'd' => '4',
                 'e' => '5',
                 'f' => '6',
-            ),
-        );
+            ],
+        ];
 
-        $output = array(
+        $output = [
             'a' => '1',
             'b' => '2',
             'c' => '3',
             'd' => '4',
             'e' => '5',
             'f' => '6',
-        );
+        ];
 
         $this->assertSame($output, $this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformCompletelyEmpty()
     {
-        $input = array(
+        $input = [
             'first' => '',
             'second' => '',
-        );
+        ];
 
         $this->assertNull($this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformCompletelyNull()
     {
-        $input = array(
+        $input = [
             'first' => null,
             'second' => null,
-        );
+        ];
 
         $this->assertNull($this->transformer->reverseTransform($input));
     }
@@ -128,14 +128,14 @@ class ArrayToPartsTransformerTest extends TestCase
      */
     public function testReverseTransformPartiallyNull()
     {
-        $input = array(
-            'first' => array(
+        $input = [
+            'first' => [
                 'a' => '1',
                 'b' => '2',
                 'c' => '3',
-            ),
+            ],
             'second' => null,
-        );
+        ];
 
         $this->transformer->reverseTransform($input);
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
index 385accd7f3..283dd4a81d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BaseDateTimeTransformerTest.php
@@ -21,7 +21,7 @@ class BaseDateTimeTransformerTest extends TestCase
      */
     public function testConstructFailsIfInputTimezoneIsInvalid()
     {
-        $this->getMockBuilder('Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer')->setConstructorArgs(array('this_timezone_does_not_exist'))->getMock();
+        $this->getMockBuilder('Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer')->setConstructorArgs(['this_timezone_does_not_exist'])->getMock();
     }
 
     /**
@@ -30,6 +30,6 @@ class BaseDateTimeTransformerTest extends TestCase
      */
     public function testConstructFailsIfOutputTimezoneIsInvalid()
     {
-        $this->getMockBuilder('Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer')->setConstructorArgs(array(null, 'that_timezone_does_not_exist'))->getMock();
+        $this->getMockBuilder('Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer')->setConstructorArgs([null, 'that_timezone_does_not_exist'])->getMock();
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
index bbb9d0792a..d4adb4409c 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/BooleanToStringTransformerTest.php
@@ -71,7 +71,7 @@ class BooleanToStringTransformerTest extends TestCase
 
     public function testCustomFalseValues()
     {
-        $customFalseTransformer = new BooleanToStringTransformer(self::TRUE_VALUE, array('0', 'myFalse', true));
+        $customFalseTransformer = new BooleanToStringTransformer(self::TRUE_VALUE, ['0', 'myFalse', true]);
         $this->assertFalse($customFalseTransformer->reverseTransform('myFalse'));
         $this->assertFalse($customFalseTransformer->reverseTransform('0'));
         $this->assertFalse($customFalseTransformer->reverseTransform(true));
@@ -82,12 +82,12 @@ class BooleanToStringTransformerTest extends TestCase
      */
     public function testTrueValueContainedInFalseValues()
     {
-        new BooleanToStringTransformer('0', array(null, '0'));
+        new BooleanToStringTransformer('0', [null, '0']);
     }
 
     public function testBeStrictOnTrueInFalseValueCheck()
     {
-        $transformer = new BooleanToStringTransformer('0', array(null, false));
+        $transformer = new BooleanToStringTransformer('0', [null, false]);
         $this->assertInstanceOf(BooleanToStringTransformer::class, $transformer);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
index cf5dbaa6af..da41a89729 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoiceToValueTransformerTest.php
@@ -22,8 +22,8 @@ class ChoiceToValueTransformerTest extends TestCase
 
     protected function setUp()
     {
-        $list = new ArrayChoiceList(array('', false, 'X', true));
-        $listWithNull = new ArrayChoiceList(array('', false, 'X', null));
+        $list = new ArrayChoiceList(['', false, 'X', true]);
+        $listWithNull = new ArrayChoiceList(['', false, 'X', null]);
 
         $this->transformer = new ChoiceToValueTransformer($list);
         $this->transformerWithNull = new ChoiceToValueTransformer($listWithNull);
@@ -37,13 +37,13 @@ class ChoiceToValueTransformerTest extends TestCase
 
     public function transformProvider()
     {
-        return array(
+        return [
             // more extensive test set can be found in FormUtilTest
-            array('', '', '', '0'),
-            array(false, '0', false, '1'),
-            array('X', 'X', 'X', '2'),
-            array(true, '1', null, '3'),
-        );
+            ['', '', '', '0'],
+            [false, '0', false, '1'],
+            ['X', 'X', 'X', '2'],
+            [true, '1', null, '3'],
+        ];
     }
 
     /**
@@ -57,14 +57,14 @@ class ChoiceToValueTransformerTest extends TestCase
 
     public function reverseTransformProvider()
     {
-        return array(
+        return [
             // values are expected to be valid choice keys already and stay
             // the same
-            array('', '', '0', ''),
-            array('0', false, '1', false),
-            array('X', 'X', '2', 'X'),
-            array('1', true, '3', null),
-        );
+            ['', '', '0', ''],
+            ['0', false, '1', false],
+            ['X', 'X', '2', 'X'],
+            ['1', true, '3', null],
+        ];
     }
 
     /**
@@ -78,12 +78,12 @@ class ChoiceToValueTransformerTest extends TestCase
 
     public function reverseTransformExpectsStringOrNullProvider()
     {
-        return array(
-            array(0),
-            array(true),
-            array(false),
-            array(array()),
-        );
+        return [
+            [0],
+            [true],
+            [false],
+            [[]],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
index aa4936f822..9e7a666ba8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ChoicesToValuesTransformerTest.php
@@ -22,8 +22,8 @@ class ChoicesToValuesTransformerTest extends TestCase
 
     protected function setUp()
     {
-        $list = new ArrayChoiceList(array('', false, 'X'));
-        $listWithNull = new ArrayChoiceList(array('', false, 'X', null));
+        $list = new ArrayChoiceList(['', false, 'X']);
+        $listWithNull = new ArrayChoiceList(['', false, 'X', null]);
 
         $this->transformer = new ChoicesToValuesTransformer($list);
         $this->transformerWithNull = new ChoicesToValuesTransformer($listWithNull);
@@ -37,20 +37,20 @@ class ChoicesToValuesTransformerTest extends TestCase
 
     public function testTransform()
     {
-        $in = array('', false, 'X');
-        $out = array('', '0', 'X');
+        $in = ['', false, 'X'];
+        $out = ['', '0', 'X'];
 
         $this->assertSame($out, $this->transformer->transform($in));
 
         $in[] = null;
-        $outWithNull = array('0', '1', '2', '3');
+        $outWithNull = ['0', '1', '2', '3'];
 
         $this->assertSame($outWithNull, $this->transformerWithNull->transform($in));
     }
 
     public function testTransformNull()
     {
-        $this->assertSame(array(), $this->transformer->transform(null));
+        $this->assertSame([], $this->transformer->transform(null));
     }
 
     /**
@@ -64,12 +64,12 @@ class ChoicesToValuesTransformerTest extends TestCase
     public function testReverseTransform()
     {
         // values are expected to be valid choices and stay the same
-        $in = array('', '0', 'X');
-        $out = array('', false, 'X');
+        $in = ['', '0', 'X'];
+        $out = ['', false, 'X'];
 
         $this->assertSame($out, $this->transformer->reverseTransform($in));
         // values are expected to be valid choices and stay the same
-        $inWithNull = array('0', '1', '2', '3');
+        $inWithNull = ['0', '1', '2', '3'];
         $out[] = null;
 
         $this->assertSame($out, $this->transformerWithNull->reverseTransform($inWithNull));
@@ -77,8 +77,8 @@ class ChoicesToValuesTransformerTest extends TestCase
 
     public function testReverseTransformNull()
     {
-        $this->assertSame(array(), $this->transformer->reverseTransform(null));
-        $this->assertSame(array(), $this->transformerWithNull->reverseTransform(null));
+        $this->assertSame([], $this->transformer->reverseTransform(null));
+        $this->assertSame([], $this->transformerWithNull->reverseTransform(null));
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
index 16302b3483..f62d3c5211 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DataTransformerChainTest.php
@@ -29,7 +29,7 @@ class DataTransformerChainTest extends TestCase
             ->with($this->identicalTo('bar'))
             ->will($this->returnValue('baz'));
 
-        $chain = new DataTransformerChain(array($transformer1, $transformer2));
+        $chain = new DataTransformerChain([$transformer1, $transformer2]);
 
         $this->assertEquals('baz', $chain->transform('foo'));
     }
@@ -47,7 +47,7 @@ class DataTransformerChainTest extends TestCase
             ->with($this->identicalTo('bar'))
             ->will($this->returnValue('baz'));
 
-        $chain = new DataTransformerChain(array($transformer1, $transformer2));
+        $chain = new DataTransformerChain([$transformer1, $transformer2]);
 
         $this->assertEquals('baz', $chain->reverseTransform('foo'));
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateIntervalToStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateIntervalToStringTransformerTest.php
index 0029e2fda7..f3127349cb 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateIntervalToStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateIntervalToStringTransformerTest.php
@@ -22,36 +22,36 @@ class DateIntervalToStringTransformerTest extends DateIntervalTestCase
 {
     public function dataProviderISO()
     {
-        $data = array(
-            array('P%YY%MM%DDT%HH%IM%SS', 'P00Y00M00DT00H00M00S', 'PT0S'),
-            array('P%yY%mM%dDT%hH%iM%sS', 'P0Y0M0DT0H0M0S', 'PT0S'),
-            array('P%yY%mM%dDT%hH%iM%sS', 'P10Y2M3DT16H5M6S', 'P10Y2M3DT16H5M6S'),
-            array('P%yY%mM%dDT%hH%iM', 'P10Y2M3DT16H5M', 'P10Y2M3DT16H5M'),
-            array('P%yY%mM%dDT%hH', 'P10Y2M3DT16H', 'P10Y2M3DT16H'),
-            array('P%yY%mM%dD', 'P10Y2M3D', 'P10Y2M3DT0H'),
-        );
+        $data = [
+            ['P%YY%MM%DDT%HH%IM%SS', 'P00Y00M00DT00H00M00S', 'PT0S'],
+            ['P%yY%mM%dDT%hH%iM%sS', 'P0Y0M0DT0H0M0S', 'PT0S'],
+            ['P%yY%mM%dDT%hH%iM%sS', 'P10Y2M3DT16H5M6S', 'P10Y2M3DT16H5M6S'],
+            ['P%yY%mM%dDT%hH%iM', 'P10Y2M3DT16H5M', 'P10Y2M3DT16H5M'],
+            ['P%yY%mM%dDT%hH', 'P10Y2M3DT16H', 'P10Y2M3DT16H'],
+            ['P%yY%mM%dD', 'P10Y2M3D', 'P10Y2M3DT0H'],
+        ];
 
         return $data;
     }
 
     public function dataProviderDate()
     {
-        $data = array(
-            array(
+        $data = [
+            [
                 '%y years %m months %d days %h hours %i minutes %s seconds',
                 '10 years 2 months 3 days 16 hours 5 minutes 6 seconds',
                 'P10Y2M3DT16H5M6S',
-            ),
-            array(
+            ],
+            [
                 '%y years %m months %d days %h hours %i minutes',
                 '10 years 2 months 3 days 16 hours 5 minutes',
                 'P10Y2M3DT16H5M',
-            ),
-            array('%y years %m months %d days %h hours', '10 years 2 months 3 days 16 hours', 'P10Y2M3DT16H'),
-            array('%y years %m months %d days', '10 years 2 months 3 days', 'P10Y2M3D'),
-            array('%y years %m months', '10 years 2 months', 'P10Y2M'),
-            array('%y year', '1 year', 'P1Y'),
-        );
+            ],
+            ['%y years %m months %d days %h hours', '10 years 2 months 3 days 16 hours', 'P10Y2M3DT16H'],
+            ['%y years %m months %d days', '10 years 2 months 3 days', 'P10Y2M3D'],
+            ['%y years %m months', '10 years 2 months', 'P10Y2M'],
+            ['%y year', '1 year', 'P1Y'],
+        ];
 
         return $data;
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToArrayTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToArrayTransformerTest.php
index e9a0efb3a8..2669d3d4af 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToArrayTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToArrayTransformerTest.php
@@ -22,14 +22,14 @@ class DateTimeToArrayTransformerTest extends TestCase
 
         $input = new \DateTime('2010-02-03 04:05:06 UTC');
 
-        $output = array(
+        $output = [
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform($input));
     }
@@ -38,43 +38,43 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer();
 
-        $output = array(
+        $output = [
             'year' => '',
             'month' => '',
             'day' => '',
             'hour' => '',
             'minute' => '',
             'second' => '',
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform(null));
     }
 
     public function testTransformEmptyWithFields()
     {
-        $transformer = new DateTimeToArrayTransformer(null, null, array('year', 'minute', 'second'));
+        $transformer = new DateTimeToArrayTransformer(null, null, ['year', 'minute', 'second']);
 
-        $output = array(
+        $output = [
             'year' => '',
             'minute' => '',
             'second' => '',
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform(null));
     }
 
     public function testTransformWithFields()
     {
-        $transformer = new DateTimeToArrayTransformer('UTC', 'UTC', array('year', 'month', 'minute', 'second'));
+        $transformer = new DateTimeToArrayTransformer('UTC', 'UTC', ['year', 'month', 'minute', 'second']);
 
         $input = new \DateTime('2010-02-03 04:05:06 UTC');
 
-        $output = array(
+        $output = [
             'year' => '2010',
             'month' => '2',
             'minute' => '5',
             'second' => '6',
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform($input));
     }
@@ -85,14 +85,14 @@ class DateTimeToArrayTransformerTest extends TestCase
 
         $input = new \DateTime('2010-02-03 04:05:06 UTC');
 
-        $output = array(
+        $output = [
             'year' => '2010',
             'month' => '02',
             'day' => '03',
             'hour' => '04',
             'minute' => '05',
             'second' => '06',
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform($input));
     }
@@ -105,14 +105,14 @@ class DateTimeToArrayTransformerTest extends TestCase
 
         $dateTime = new \DateTime('2010-02-03 04:05:06 America/New_York');
         $dateTime->setTimezone(new \DateTimeZone('Asia/Hong_Kong'));
-        $output = array(
+        $output = [
             'year' => (string) (int) $dateTime->format('Y'),
             'month' => (string) (int) $dateTime->format('m'),
             'day' => (string) (int) $dateTime->format('d'),
             'hour' => (string) (int) $dateTime->format('H'),
             'minute' => (string) (int) $dateTime->format('i'),
             'second' => (string) (int) $dateTime->format('s'),
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform($input));
     }
@@ -125,14 +125,14 @@ class DateTimeToArrayTransformerTest extends TestCase
 
         $dateTime = new \DateTimeImmutable('2010-02-03 04:05:06 America/New_York');
         $dateTime = $dateTime->setTimezone(new \DateTimeZone('Asia/Hong_Kong'));
-        $output = array(
+        $output = [
             'year' => (string) (int) $dateTime->format('Y'),
             'month' => (string) (int) $dateTime->format('m'),
             'day' => (string) (int) $dateTime->format('d'),
             'hour' => (string) (int) $dateTime->format('H'),
             'minute' => (string) (int) $dateTime->format('i'),
             'second' => (string) (int) $dateTime->format('s'),
-        );
+        ];
 
         $this->assertSame($output, $transformer->transform($input));
     }
@@ -150,14 +150,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer('UTC', 'UTC');
 
-        $input = array(
+        $input = [
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        );
+        ];
 
         $output = new \DateTime('2010-02-03 04:05:06 UTC');
 
@@ -168,14 +168,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer('UTC', 'UTC');
 
-        $input = array(
+        $input = [
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '0',
             'second' => '0',
-        );
+        ];
 
         $output = new \DateTime('2010-02-03 04:00:00 UTC');
 
@@ -186,27 +186,27 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer();
 
-        $input = array(
+        $input = [
             'year' => '',
             'month' => '',
             'day' => '',
             'hour' => '',
             'minute' => '',
             'second' => '',
-        );
+        ];
 
         $this->assertNull($transformer->reverseTransform($input));
     }
 
     public function testReverseTransformCompletelyEmptySubsetOfFields()
     {
-        $transformer = new DateTimeToArrayTransformer(null, null, array('year', 'month', 'day'));
+        $transformer = new DateTimeToArrayTransformer(null, null, ['year', 'month', 'day']);
 
-        $input = array(
+        $input = [
             'year' => '',
             'month' => '',
             'day' => '',
-        );
+        ];
 
         $this->assertNull($transformer->reverseTransform($input));
     }
@@ -217,13 +217,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptyYear()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -232,13 +232,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptyMonth()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -247,13 +247,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptyDay()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -262,13 +262,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptyHour()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -277,13 +277,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptyMinute()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -292,13 +292,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformPartiallyEmptySecond()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
-        ));
+        ]);
     }
 
     public function testReverseTransformNull()
@@ -312,14 +312,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer('America/New_York', 'Asia/Hong_Kong');
 
-        $input = array(
+        $input = [
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        );
+        ];
 
         $output = new \DateTime('2010-02-03 04:05:06 Asia/Hong_Kong');
         $output->setTimezone(new \DateTimeZone('America/New_York'));
@@ -331,14 +331,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     {
         $transformer = new DateTimeToArrayTransformer('Asia/Hong_Kong', 'UTC');
 
-        $input = array(
+        $input = [
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        );
+        ];
 
         $output = new \DateTime('2010-02-03 04:05:06 UTC');
         $output->setTimezone(new \DateTimeZone('Asia/Hong_Kong'));
@@ -361,14 +361,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeYear()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '-1',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -377,14 +377,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeMonth()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '-1',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -393,14 +393,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeDay()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '-1',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -409,14 +409,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeHour()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '-1',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -425,14 +425,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeMinute()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '-1',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -441,14 +441,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithNegativeSecond()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '-1',
-        ));
+        ]);
     }
 
     /**
@@ -457,14 +457,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithInvalidMonth()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '13',
             'day' => '3',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -473,14 +473,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithInvalidDay()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '31',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -489,14 +489,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithStringDay()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => 'bazinga',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -505,14 +505,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithStringMonth()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => 'bazinga',
             'day' => '31',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -521,14 +521,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithStringYear()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => 'bazinga',
             'month' => '2',
             'day' => '31',
             'hour' => '4',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -537,14 +537,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithEmptyStringHour()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '31',
             'hour' => '',
             'minute' => '5',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -553,14 +553,14 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithEmptyStringMinute()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '31',
             'hour' => '4',
             'minute' => '',
             'second' => '6',
-        ));
+        ]);
     }
 
     /**
@@ -569,13 +569,13 @@ class DateTimeToArrayTransformerTest extends TestCase
     public function testReverseTransformWithEmptyStringSecond()
     {
         $transformer = new DateTimeToArrayTransformer();
-        $transformer->reverseTransform(array(
+        $transformer->reverseTransform([
             'year' => '2010',
             'month' => '2',
             'day' => '31',
             'hour' => '4',
             'minute' => '5',
             'second' => '',
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformerTest.php
index 3a530f6647..8122037816 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformerTest.php
@@ -28,34 +28,34 @@ class DateTimeToHtml5LocalDateTimeTransformerTest extends TestCase
 
     public function transformProvider()
     {
-        return array(
-            array('UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06'),
-            array('UTC', 'UTC', null, ''),
-            array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06'),
-            array('America/New_York', 'Asia/Hong_Kong', null, ''),
-            array('UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06'),
-            array('America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06'),
-        );
+        return [
+            ['UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06'],
+            ['UTC', 'UTC', null, ''],
+            ['America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06'],
+            ['America/New_York', 'Asia/Hong_Kong', null, ''],
+            ['UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06'],
+            ['America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06'],
+        ];
     }
 
     public function reverseTransformProvider()
     {
-        return array(
+        return [
             // format without seconds, as appears in some browsers
-            array('UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06'),
-            array('UTC', 'UTC', null, ''),
-            array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06'),
-            array('America/New_York', 'Asia/Hong_Kong', null, ''),
-            array('UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06'),
-            array('America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06'),
-            array('UTC', 'UTC', '2010-02-03 04:05:00 UTC', '2010-02-03T04:05'),
-            array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:00 America/New_York', '2010-02-03T17:05'),
-            array('Europe/Amsterdam', 'Europe/Amsterdam', '2013-08-21 10:30:00 Europe/Amsterdam', '2013-08-21T10:30:00'),
-            array('UTC', 'UTC', '2018-09-15T10:00:00Z', '2018-09-15T10:00:00Z'),
-            array('Europe/Berlin', 'Europe/Berlin', '2018-09-15T10:00:00+02:00', '2018-09-15T10:00:00+02:00'),
-            array('Europe/Berlin', 'Europe/Berlin', '2018-09-15T10:00:00+0200', '2018-09-15T10:00:00+0200'),
-            array('UTC', 'UTC', '2018-10-03T10:00:00.000Z', '2018-10-03T10:00:00.000Z'),
-        );
+            ['UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06'],
+            ['UTC', 'UTC', null, ''],
+            ['America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06'],
+            ['America/New_York', 'Asia/Hong_Kong', null, ''],
+            ['UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06'],
+            ['America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06'],
+            ['UTC', 'UTC', '2010-02-03 04:05:00 UTC', '2010-02-03T04:05'],
+            ['America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:00 America/New_York', '2010-02-03T17:05'],
+            ['Europe/Amsterdam', 'Europe/Amsterdam', '2013-08-21 10:30:00 Europe/Amsterdam', '2013-08-21T10:30:00'],
+            ['UTC', 'UTC', '2018-09-15T10:00:00Z', '2018-09-15T10:00:00Z'],
+            ['Europe/Berlin', 'Europe/Berlin', '2018-09-15T10:00:00+02:00', '2018-09-15T10:00:00+02:00'],
+            ['Europe/Berlin', 'Europe/Berlin', '2018-09-15T10:00:00+0200', '2018-09-15T10:00:00+0200'],
+            ['UTC', 'UTC', '2018-10-03T10:00:00.000Z', '2018-10-03T10:00:00.000Z'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformerTest.php
index ea25c7320e..6e8572728b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToLocalizedStringTransformerTest.php
@@ -51,36 +51,36 @@ class DateTimeToLocalizedStringTransformerTest extends TestCase
 
     public function dataProvider()
     {
-        return array(
-            array(\IntlDateFormatter::SHORT, null, null, '03.02.10, 04:05', '2010-02-03 04:05:00 UTC'),
-            array(\IntlDateFormatter::MEDIUM, null, null, '03.02.2010, 04:05', '2010-02-03 04:05:00 UTC'),
-            array(\IntlDateFormatter::LONG, null, null, '3. Februar 2010 um 04:05', '2010-02-03 04:05:00 UTC'),
-            array(\IntlDateFormatter::FULL, null, null, 'Mittwoch, 3. Februar 2010 um 04:05', '2010-02-03 04:05:00 UTC'),
-            array(\IntlDateFormatter::SHORT, \IntlDateFormatter::NONE, null, '03.02.10', '2010-02-03 00:00:00 UTC'),
-            array(\IntlDateFormatter::MEDIUM, \IntlDateFormatter::NONE, null, '03.02.2010', '2010-02-03 00:00:00 UTC'),
-            array(\IntlDateFormatter::LONG, \IntlDateFormatter::NONE, null, '3. Februar 2010', '2010-02-03 00:00:00 UTC'),
-            array(\IntlDateFormatter::FULL, \IntlDateFormatter::NONE, null, 'Mittwoch, 3. Februar 2010', '2010-02-03 00:00:00 UTC'),
-            array(null, \IntlDateFormatter::SHORT, null, '03.02.2010, 04:05', '2010-02-03 04:05:00 UTC'),
-            array(null, \IntlDateFormatter::MEDIUM, null, '03.02.2010, 04:05:06', '2010-02-03 04:05:06 UTC'),
-            array(null, \IntlDateFormatter::LONG, null, '03.02.2010, 04:05:06 UTC', '2010-02-03 04:05:06 UTC'),
-            array(null, \IntlDateFormatter::LONG, null, '03.02.2010, 04:05:06 UTC', '2010-02-03 04:05:06 GMT'),
+        return [
+            [\IntlDateFormatter::SHORT, null, null, '03.02.10, 04:05', '2010-02-03 04:05:00 UTC'],
+            [\IntlDateFormatter::MEDIUM, null, null, '03.02.2010, 04:05', '2010-02-03 04:05:00 UTC'],
+            [\IntlDateFormatter::LONG, null, null, '3. Februar 2010 um 04:05', '2010-02-03 04:05:00 UTC'],
+            [\IntlDateFormatter::FULL, null, null, 'Mittwoch, 3. Februar 2010 um 04:05', '2010-02-03 04:05:00 UTC'],
+            [\IntlDateFormatter::SHORT, \IntlDateFormatter::NONE, null, '03.02.10', '2010-02-03 00:00:00 UTC'],
+            [\IntlDateFormatter::MEDIUM, \IntlDateFormatter::NONE, null, '03.02.2010', '2010-02-03 00:00:00 UTC'],
+            [\IntlDateFormatter::LONG, \IntlDateFormatter::NONE, null, '3. Februar 2010', '2010-02-03 00:00:00 UTC'],
+            [\IntlDateFormatter::FULL, \IntlDateFormatter::NONE, null, 'Mittwoch, 3. Februar 2010', '2010-02-03 00:00:00 UTC'],
+            [null, \IntlDateFormatter::SHORT, null, '03.02.2010, 04:05', '2010-02-03 04:05:00 UTC'],
+            [null, \IntlDateFormatter::MEDIUM, null, '03.02.2010, 04:05:06', '2010-02-03 04:05:06 UTC'],
+            [null, \IntlDateFormatter::LONG, null, '03.02.2010, 04:05:06 UTC', '2010-02-03 04:05:06 UTC'],
+            [null, \IntlDateFormatter::LONG, null, '03.02.2010, 04:05:06 UTC', '2010-02-03 04:05:06 GMT'],
             // see below for extra test case for time format FULL
-            array(\IntlDateFormatter::NONE, \IntlDateFormatter::SHORT, null, '04:05', '1970-01-01 04:05:00 UTC'),
-            array(\IntlDateFormatter::NONE, \IntlDateFormatter::MEDIUM, null, '04:05:06', '1970-01-01 04:05:06 UTC'),
-            array(\IntlDateFormatter::NONE, \IntlDateFormatter::LONG, null, '04:05:06 UTC', '1970-01-01 04:05:06 GMT'),
-            array(\IntlDateFormatter::NONE, \IntlDateFormatter::LONG, null, '04:05:06 UTC', '1970-01-01 04:05:06 UTC'),
-            array(null, null, 'yyyy-MM-dd HH:mm:00', '2010-02-03 04:05:00', '2010-02-03 04:05:00 UTC'),
-            array(null, null, 'yyyy-MM-dd HH:mm', '2010-02-03 04:05', '2010-02-03 04:05:00 UTC'),
-            array(null, null, 'yyyy-MM-dd HH', '2010-02-03 04', '2010-02-03 04:00:00 UTC'),
-            array(null, null, 'yyyy-MM-dd', '2010-02-03', '2010-02-03 00:00:00 UTC'),
-            array(null, null, 'yyyy-MM', '2010-02', '2010-02-01 00:00:00 UTC'),
-            array(null, null, 'yyyy', '2010', '2010-01-01 00:00:00 UTC'),
-            array(null, null, 'dd-MM-yyyy', '03-02-2010', '2010-02-03 00:00:00 UTC'),
-            array(null, null, 'HH:mm:ss', '04:05:06', '1970-01-01 04:05:06 UTC'),
-            array(null, null, 'HH:mm:00', '04:05:00', '1970-01-01 04:05:00 UTC'),
-            array(null, null, 'HH:mm', '04:05', '1970-01-01 04:05:00 UTC'),
-            array(null, null, 'HH', '04', '1970-01-01 04:00:00 UTC'),
-        );
+            [\IntlDateFormatter::NONE, \IntlDateFormatter::SHORT, null, '04:05', '1970-01-01 04:05:00 UTC'],
+            [\IntlDateFormatter::NONE, \IntlDateFormatter::MEDIUM, null, '04:05:06', '1970-01-01 04:05:06 UTC'],
+            [\IntlDateFormatter::NONE, \IntlDateFormatter::LONG, null, '04:05:06 UTC', '1970-01-01 04:05:06 GMT'],
+            [\IntlDateFormatter::NONE, \IntlDateFormatter::LONG, null, '04:05:06 UTC', '1970-01-01 04:05:06 UTC'],
+            [null, null, 'yyyy-MM-dd HH:mm:00', '2010-02-03 04:05:00', '2010-02-03 04:05:00 UTC'],
+            [null, null, 'yyyy-MM-dd HH:mm', '2010-02-03 04:05', '2010-02-03 04:05:00 UTC'],
+            [null, null, 'yyyy-MM-dd HH', '2010-02-03 04', '2010-02-03 04:00:00 UTC'],
+            [null, null, 'yyyy-MM-dd', '2010-02-03', '2010-02-03 00:00:00 UTC'],
+            [null, null, 'yyyy-MM', '2010-02', '2010-02-01 00:00:00 UTC'],
+            [null, null, 'yyyy', '2010', '2010-01-01 00:00:00 UTC'],
+            [null, null, 'dd-MM-yyyy', '03-02-2010', '2010-02-03 00:00:00 UTC'],
+            [null, null, 'HH:mm:ss', '04:05:06', '1970-01-01 04:05:06 UTC'],
+            [null, null, 'HH:mm:00', '04:05:00', '1970-01-01 04:05:00 UTC'],
+            [null, null, 'HH:mm', '04:05', '1970-01-01 04:05:00 UTC'],
+            [null, null, 'HH', '04', '1970-01-01 04:00:00 UTC'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToRfc3339TransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToRfc3339TransformerTest.php
index 053cb62864..2352ea6cc3 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToRfc3339TransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToRfc3339TransformerTest.php
@@ -45,14 +45,14 @@ class DateTimeToRfc3339TransformerTest extends TestCase
 
     public function allProvider()
     {
-        return array(
-            array('UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06Z'),
-            array('UTC', 'UTC', null, ''),
-            array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06+08:00'),
-            array('America/New_York', 'Asia/Hong_Kong', null, ''),
-            array('UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06+08:00'),
-            array('America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06Z'),
-        );
+        return [
+            ['UTC', 'UTC', '2010-02-03 04:05:06 UTC', '2010-02-03T04:05:06Z'],
+            ['UTC', 'UTC', null, ''],
+            ['America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:06 America/New_York', '2010-02-03T17:05:06+08:00'],
+            ['America/New_York', 'Asia/Hong_Kong', null, ''],
+            ['UTC', 'Asia/Hong_Kong', '2010-02-03 04:05:06 UTC', '2010-02-03T12:05:06+08:00'],
+            ['America/New_York', 'UTC', '2010-02-03 04:05:06 America/New_York', '2010-02-03T09:05:06Z'],
+        ];
     }
 
     public function transformProvider()
@@ -62,13 +62,13 @@ class DateTimeToRfc3339TransformerTest extends TestCase
 
     public function reverseTransformProvider()
     {
-        return array_merge($this->allProvider(), array(
+        return array_merge($this->allProvider(), [
             // format without seconds, as appears in some browsers
-            array('UTC', 'UTC', '2010-02-03 04:05:00 UTC', '2010-02-03T04:05Z'),
-            array('America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:00 America/New_York', '2010-02-03T17:05+08:00'),
-            array('Europe/Amsterdam', 'Europe/Amsterdam', '2013-08-21 10:30:00 Europe/Amsterdam', '2013-08-21T08:30:00Z'),
-            array('UTC', 'UTC', '2018-10-03T10:00:00.000Z', '2018-10-03T10:00:00.000Z'),
-        ));
+            ['UTC', 'UTC', '2010-02-03 04:05:00 UTC', '2010-02-03T04:05Z'],
+            ['America/New_York', 'Asia/Hong_Kong', '2010-02-03 04:05:00 America/New_York', '2010-02-03T17:05+08:00'],
+            ['Europe/Amsterdam', 'Europe/Amsterdam', '2013-08-21 10:30:00 Europe/Amsterdam', '2013-08-21T08:30:00Z'],
+            ['UTC', 'UTC', '2018-10-03T10:00:00.000Z', '2018-10-03T10:00:00.000Z'],
+        ]);
     }
 
     /**
@@ -146,13 +146,13 @@ class DateTimeToRfc3339TransformerTest extends TestCase
 
     public function invalidDateStringProvider()
     {
-        return array(
-            'invalid month' => array('2010-2010-01'),
-            'invalid day' => array('2010-10-2010'),
-            'no date' => array('x'),
-            'cookie format' => array('Saturday, 01-May-2010 04:05:00 Z'),
-            'RFC 822 format' => array('Sat, 01 May 10 04:05:00 +0000'),
-            'RSS format' => array('Sat, 01 May 2010 04:05:00 +0000'),
-        );
+        return [
+            'invalid month' => ['2010-2010-01'],
+            'invalid day' => ['2010-10-2010'],
+            'no date' => ['x'],
+            'cookie format' => ['Saturday, 01-May-2010 04:05:00 Z'],
+            'RFC 822 format' => ['Sat, 01 May 10 04:05:00 +0000'],
+            'RSS format' => ['Sat, 01 May 2010 04:05:00 +0000'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToStringTransformerTest.php
index cc2681b305..939c61847f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeToStringTransformerTest.php
@@ -18,50 +18,50 @@ class DateTimeToStringTransformerTest extends TestCase
 {
     public function dataProvider()
     {
-        $data = array(
-            array('Y-m-d H:i:s', '2010-02-03 16:05:06', '2010-02-03 16:05:06 UTC'),
-            array('Y-m-d H:i:00', '2010-02-03 16:05:00', '2010-02-03 16:05:00 UTC'),
-            array('Y-m-d H:i', '2010-02-03 16:05', '2010-02-03 16:05:00 UTC'),
-            array('Y-m-d H', '2010-02-03 16', '2010-02-03 16:00:00 UTC'),
-            array('Y-m-d', '2010-02-03', '2010-02-03 00:00:00 UTC'),
-            array('Y-m', '2010-12', '2010-12-01 00:00:00 UTC'),
-            array('Y', '2010', '2010-01-01 00:00:00 UTC'),
-            array('d-m-Y', '03-02-2010', '2010-02-03 00:00:00 UTC'),
-            array('H:i:s', '16:05:06', '1970-01-01 16:05:06 UTC'),
-            array('H:i:00', '16:05:00', '1970-01-01 16:05:00 UTC'),
-            array('H:i', '16:05', '1970-01-01 16:05:00 UTC'),
-            array('H', '16', '1970-01-01 16:00:00 UTC'),
-            array('Y-z', '2010-33', '2010-02-03 00:00:00 UTC'),
+        $data = [
+            ['Y-m-d H:i:s', '2010-02-03 16:05:06', '2010-02-03 16:05:06 UTC'],
+            ['Y-m-d H:i:00', '2010-02-03 16:05:00', '2010-02-03 16:05:00 UTC'],
+            ['Y-m-d H:i', '2010-02-03 16:05', '2010-02-03 16:05:00 UTC'],
+            ['Y-m-d H', '2010-02-03 16', '2010-02-03 16:00:00 UTC'],
+            ['Y-m-d', '2010-02-03', '2010-02-03 00:00:00 UTC'],
+            ['Y-m', '2010-12', '2010-12-01 00:00:00 UTC'],
+            ['Y', '2010', '2010-01-01 00:00:00 UTC'],
+            ['d-m-Y', '03-02-2010', '2010-02-03 00:00:00 UTC'],
+            ['H:i:s', '16:05:06', '1970-01-01 16:05:06 UTC'],
+            ['H:i:00', '16:05:00', '1970-01-01 16:05:00 UTC'],
+            ['H:i', '16:05', '1970-01-01 16:05:00 UTC'],
+            ['H', '16', '1970-01-01 16:00:00 UTC'],
+            ['Y-z', '2010-33', '2010-02-03 00:00:00 UTC'],
 
             // different day representations
-            array('Y-m-j', '2010-02-3', '2010-02-03 00:00:00 UTC'),
-            array('z', '33', '1970-02-03 00:00:00 UTC'),
+            ['Y-m-j', '2010-02-3', '2010-02-03 00:00:00 UTC'],
+            ['z', '33', '1970-02-03 00:00:00 UTC'],
 
             // not bijective
             // this will not work as PHP will use actual date to replace missing info
             // and after change of date will lookup for closest Wednesday
             // i.e. value: 2010-02, PHP value: 2010-02-(today i.e. 20), parsed date: 2010-02-24
-            //array('Y-m-D', '2010-02-Wed', '2010-02-03 00:00:00 UTC'),
-            //array('Y-m-l', '2010-02-Wednesday', '2010-02-03 00:00:00 UTC'),
+            //['Y-m-D', '2010-02-Wed', '2010-02-03 00:00:00 UTC'],
+            //['Y-m-l', '2010-02-Wednesday', '2010-02-03 00:00:00 UTC'],
 
             // different month representations
-            array('Y-n-d', '2010-2-03', '2010-02-03 00:00:00 UTC'),
-            array('Y-M-d', '2010-Feb-03', '2010-02-03 00:00:00 UTC'),
-            array('Y-F-d', '2010-February-03', '2010-02-03 00:00:00 UTC'),
+            ['Y-n-d', '2010-2-03', '2010-02-03 00:00:00 UTC'],
+            ['Y-M-d', '2010-Feb-03', '2010-02-03 00:00:00 UTC'],
+            ['Y-F-d', '2010-February-03', '2010-02-03 00:00:00 UTC'],
 
             // different year representations
-            array('y-m-d', '10-02-03', '2010-02-03 00:00:00 UTC'),
+            ['y-m-d', '10-02-03', '2010-02-03 00:00:00 UTC'],
 
             // different time representations
-            array('G:i:s', '16:05:06', '1970-01-01 16:05:06 UTC'),
-            array('g:i:s a', '4:05:06 pm', '1970-01-01 16:05:06 UTC'),
-            array('h:i:s a', '04:05:06 pm', '1970-01-01 16:05:06 UTC'),
+            ['G:i:s', '16:05:06', '1970-01-01 16:05:06 UTC'],
+            ['g:i:s a', '4:05:06 pm', '1970-01-01 16:05:06 UTC'],
+            ['h:i:s a', '04:05:06 pm', '1970-01-01 16:05:06 UTC'],
 
             // seconds since Unix
-            array('U', '1265213106', '2010-02-03 16:05:06 UTC'),
+            ['U', '1265213106', '2010-02-03 16:05:06 UTC'],
 
-            array('Y-z', '2010-33', '2010-02-03 00:00:00 UTC'),
-        );
+            ['Y-z', '2010-33', '2010-02-03 00:00:00 UTC'],
+        ];
 
         return $data;
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeZoneToStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeZoneToStringTransformerTest.php
index e6560d7558..6aefe3cab5 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeZoneToStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/DateTimeZoneToStringTransformerTest.php
@@ -34,8 +34,8 @@ class DateTimeZoneToStringTransformerTest extends TestCase
         $this->assertNull($transformer->transform(null));
         $this->assertNull($transformer->reverseTransform(null));
 
-        $this->assertSame(array('Europe/Amsterdam'), $transformer->transform(array(new \DateTimeZone('Europe/Amsterdam'))));
-        $this->assertEquals(array(new \DateTimeZone('Europe/Amsterdam')), $transformer->reverseTransform(array('Europe/Amsterdam')));
+        $this->assertSame(['Europe/Amsterdam'], $transformer->transform([new \DateTimeZone('Europe/Amsterdam')]));
+        $this->assertEquals([new \DateTimeZone('Europe/Amsterdam')], $transformer->reverseTransform(['Europe/Amsterdam']));
     }
 
     /**
@@ -51,6 +51,6 @@ class DateTimeZoneToStringTransformerTest extends TestCase
      */
     public function testUnknownTimezone()
     {
-        (new DateTimeZoneToStringTransformer(true))->reverseTransform(array('Foo/Bar'));
+        (new DateTimeZoneToStringTransformer(true))->reverseTransform(['Foo/Bar']);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
index 566d272816..8d54b064f8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/IntegerToLocalizedStringTransformerTest.php
@@ -26,53 +26,53 @@ class IntegerToLocalizedStringTransformerTest extends TestCase
 
     public function transformWithRoundingProvider()
     {
-        return array(
+        return [
             // towards positive infinity (1.6 -> 2, -1.6 -> -1)
-            array(1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array(1234.4, '1235', IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array(-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array(-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_CEILING),
+            [1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            [1234.4, '1235', IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            [-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            [-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_CEILING],
             // towards negative infinity (1.6 -> 1, -1.6 -> -2)
-            array(1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array(-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array(-1234.4, '-1235', IntegerToLocalizedStringTransformer::ROUND_FLOOR),
+            [1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            [1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            [-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            [-1234.4, '-1235', IntegerToLocalizedStringTransformer::ROUND_FLOOR],
             // away from zero (1.6 -> 2, -1.6 -> 2)
-            array(1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_UP),
-            array(1234.4, '1235', IntegerToLocalizedStringTransformer::ROUND_UP),
-            array(-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_UP),
-            array(-1234.4, '-1235', IntegerToLocalizedStringTransformer::ROUND_UP),
+            [1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_UP],
+            [1234.4, '1235', IntegerToLocalizedStringTransformer::ROUND_UP],
+            [-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_UP],
+            [-1234.4, '-1235', IntegerToLocalizedStringTransformer::ROUND_UP],
             // towards zero (1.6 -> 1, -1.6 -> -1)
-            array(1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array(1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array(-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array(-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_DOWN),
+            [1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            [1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            [-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            [-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_DOWN],
             // round halves (.5) to the next even number
-            array(1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1233.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1232.5, '1232', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(-1233.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(-1232.5, '-1232', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
+            [1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1233.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1232.5, '1232', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [-1233.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [-1232.5, '-1232', IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
             // round halves (.5) away from zero
-            array(1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
+            [1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1234.5, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            [-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            [-1234.5, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            [-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
             // round halves (.5) towards zero
-            array(1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-        );
+            [1234.6, '1235', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1234.5, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1234.4, '1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [-1234.6, '-1235', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [-1234.5, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [-1234.4, '-1234', IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+        ];
     }
 
     /**
@@ -155,53 +155,53 @@ class IntegerToLocalizedStringTransformerTest extends TestCase
 
     public function reverseTransformWithRoundingProvider()
     {
-        return array(
+        return [
             // towards positive infinity (1.6 -> 2, -1.6 -> -1)
-            array('1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array('1234,4', 1235, IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array('-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_CEILING),
-            array('-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_CEILING),
+            ['1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            ['1234,4', 1235, IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            ['-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_CEILING],
+            ['-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_CEILING],
             // towards negative infinity (1.6 -> 1, -1.6 -> -2)
-            array('1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array('1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array('-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_FLOOR),
-            array('-1234,4', -1235, IntegerToLocalizedStringTransformer::ROUND_FLOOR),
+            ['1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            ['1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            ['-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_FLOOR],
+            ['-1234,4', -1235, IntegerToLocalizedStringTransformer::ROUND_FLOOR],
             // away from zero (1.6 -> 2, -1.6 -> 2)
-            array('1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_UP),
-            array('1234,4', 1235, IntegerToLocalizedStringTransformer::ROUND_UP),
-            array('-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_UP),
-            array('-1234,4', -1235, IntegerToLocalizedStringTransformer::ROUND_UP),
+            ['1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_UP],
+            ['1234,4', 1235, IntegerToLocalizedStringTransformer::ROUND_UP],
+            ['-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_UP],
+            ['-1234,4', -1235, IntegerToLocalizedStringTransformer::ROUND_UP],
             // towards zero (1.6 -> 1, -1.6 -> -1)
-            array('1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array('1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array('-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_DOWN),
-            array('-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_DOWN),
+            ['1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            ['1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            ['-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_DOWN],
+            ['-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_DOWN],
             // round halves (.5) to the next even number
-            array('1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('1233,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('1232,5', 1232, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('-1233,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array('-1232,5', -1232, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN),
+            ['1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['1233,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['1232,5', 1232, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['-1233,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            ['-1232,5', -1232, IntegerToLocalizedStringTransformer::ROUND_HALF_EVEN],
             // round halves (.5) away from zero
-            array('1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array('1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array('1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array('-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array('-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
-            array('-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_UP),
+            ['1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            ['1234,5', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            ['1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            ['-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            ['-1234,5', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
+            ['-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_UP],
             // round halves (.5) towards zero
-            array('1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array('1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array('1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array('-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array('-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array('-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN),
-        );
+            ['1234,6', 1235, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            ['1234,5', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            ['1234,4', 1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            ['-1234,6', -1235, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            ['-1234,5', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            ['-1234,4', -1234, IntegerToLocalizedStringTransformer::ROUND_HALF_DOWN],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
index 176d3a9a58..1f05af6128 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/NumberToLocalizedStringTransformerTest.php
@@ -26,15 +26,15 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     public function provideTransformations()
     {
-        return array(
-            array(null, '', 'de_AT'),
-            array(1, '1', 'de_AT'),
-            array(1.5, '1,5', 'de_AT'),
-            array(1234.5, '1234,5', 'de_AT'),
-            array(12345.912, '12345,912', 'de_AT'),
-            array(1234.5, '1234,5', 'ru'),
-            array(1234.5, '1234,5', 'fi'),
-        );
+        return [
+            [null, '', 'de_AT'],
+            [1, '1', 'de_AT'],
+            [1.5, '1,5', 'de_AT'],
+            [1234.5, '1234,5', 'de_AT'],
+            [12345.912, '12345,912', 'de_AT'],
+            [1234.5, '1234,5', 'ru'],
+            [1234.5, '1234,5', 'fi'],
+        ];
     }
 
     /**
@@ -54,13 +54,13 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     public function provideTransformationsWithGrouping()
     {
-        return array(
-            array(1234.5, '1.234,5', 'de_DE'),
-            array(12345.912, '12.345,912', 'de_DE'),
-            array(1234.5, '1 234,5', 'fr'),
-            array(1234.5, '1 234,5', 'ru'),
-            array(1234.5, '1 234,5', 'fi'),
-        );
+        return [
+            [1234.5, '1.234,5', 'de_DE'],
+            [12345.912, '12.345,912', 'de_DE'],
+            [1234.5, '1 234,5', 'fr'],
+            [1234.5, '1 234,5', 'ru'],
+            [1234.5, '1 234,5', 'fi'],
+        ];
     }
 
     /**
@@ -93,91 +93,91 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     public function transformWithRoundingProvider()
     {
-        return array(
+        return [
             // towards positive infinity (1.6 -> 2, -1.6 -> -1)
-            array(0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, 1234.4, '1235', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, 123.44, '123,5', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_CEILING),
+            [0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, 1234.4, '1235', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, 123.44, '123,5', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_CEILING],
             // towards negative infinity (1.6 -> 1, -1.6 -> -2)
-            array(0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, -1234.4, '-1235', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, -123.44, '-123,5', NumberToLocalizedStringTransformer::ROUND_FLOOR),
+            [0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, -1234.4, '-1235', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, -123.44, '-123,5', NumberToLocalizedStringTransformer::ROUND_FLOOR],
             // away from zero (1.6 -> 2, -1.6 -> 2)
-            array(0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, 1234.4, '1235', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, -1234.4, '-1235', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, 123.44, '123,5', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, -123.44, '-123,5', NumberToLocalizedStringTransformer::ROUND_UP),
+            [0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, 1234.4, '1235', NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, -1234.4, '-1235', NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, 123.44, '123,5', NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, -123.44, '-123,5', NumberToLocalizedStringTransformer::ROUND_UP],
             // towards zero (1.6 -> 1, -1.6 -> -1)
-            array(0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_DOWN),
+            [0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_DOWN],
             // round halves (.5) to the next even number
-            array(0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, 1233.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, 1232.5, '1232', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, -1233.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, -1232.5, '-1232', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, 123.35, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, 123.25, '123,2', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, -123.35, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, -123.25, '-123,2', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
+            [0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, 1233.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, 1232.5, '1232', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, -1233.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, -1232.5, '-1232', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, 123.35, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, 123.25, '123,2', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, -123.35, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, -123.25, '-123,2', NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
             // round halves (.5) away from zero
-            array(0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_UP),
+            [0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, 1234.5, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, -1234.5, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, 123.45, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, -123.45, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_UP],
             // round halves (.5) towards zero
-            array(0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-        );
+            [0, 1234.6, '1235', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, 1234.5, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, 1234.4, '1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, -1234.6, '-1235', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, -1234.5, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, -1234.4, '-1234', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, 123.46, '123,5', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, 123.45, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, 123.44, '123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, -123.46, '-123,5', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, -123.45, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, -123.44, '-123,4', NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+        ];
     }
 
     /**
@@ -268,93 +268,93 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     public function reverseTransformWithRoundingProvider()
     {
-        return array(
+        return [
             // towards positive infinity (1.6 -> 2, -1.6 -> -1)
-            array(0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, '1234,4', 1235, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, '123,44', 123.5, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_CEILING),
-            array(1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_CEILING),
+            [0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, '1234,4', 1235, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, '123,44', 123.5, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_CEILING],
+            [1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_CEILING],
             // towards negative infinity (1.6 -> 1, -1.6 -> -2)
-            array(0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(0, '-1234,4', -1235, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_FLOOR),
-            array(1, '-123,44', -123.5, NumberToLocalizedStringTransformer::ROUND_FLOOR),
+            [0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [0, '-1234,4', -1235, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_FLOOR],
+            [1, '-123,44', -123.5, NumberToLocalizedStringTransformer::ROUND_FLOOR],
             // away from zero (1.6 -> 2, -1.6 -> 2)
-            array(0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, '1234,4', 1235, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(0, '-1234,4', -1235, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, '123,44', 123.5, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_UP),
-            array(1, '-123,44', -123.5, NumberToLocalizedStringTransformer::ROUND_UP),
+            [0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, '1234,4', 1235, NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_UP],
+            [0, '-1234,4', -1235, NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, '123,44', 123.5, NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_UP],
+            [1, '-123,44', -123.5, NumberToLocalizedStringTransformer::ROUND_UP],
             // towards zero (1.6 -> 1, -1.6 -> -1)
-            array(0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(2, '37.37', 37.37, NumberToLocalizedStringTransformer::ROUND_DOWN),
-            array(2, '2.01', 2.01, NumberToLocalizedStringTransformer::ROUND_DOWN),
+            [0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [2, '37.37', 37.37, NumberToLocalizedStringTransformer::ROUND_DOWN],
+            [2, '2.01', 2.01, NumberToLocalizedStringTransformer::ROUND_DOWN],
             // round halves (.5) to the next even number
-            array(0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '1233,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '1232,5', 1232, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '-1233,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(0, '-1232,5', -1232, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '123,35', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '123,25', 123.2, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '-123,35', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
-            array(1, '-123,25', -123.2, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN),
+            [0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '1233,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '1232,5', 1232, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '-1233,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [0, '-1232,5', -1232, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '123,35', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '123,25', 123.2, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '-123,35', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
+            [1, '-123,25', -123.2, NumberToLocalizedStringTransformer::ROUND_HALF_EVEN],
             // round halves (.5) away from zero
-            array(0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
-            array(1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_UP),
+            [0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, '1234,5', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, '-1234,5', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '123,45', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '-123,45', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
+            [1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_UP],
             // round halves (.5) towards zero
-            array(0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-            array(1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN),
-        );
+            [0, '1234,6', 1235, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, '1234,5', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, '1234,4', 1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, '-1234,6', -1235, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, '-1234,5', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [0, '-1234,4', -1234, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '123,46', 123.5, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '123,45', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '123,44', 123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '-123,46', -123.5, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '-123,45', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+            [1, '-123,44', -123.4, NumberToLocalizedStringTransformer::ROUND_HALF_DOWN],
+        ];
     }
 
     /**
@@ -527,11 +527,11 @@ class NumberToLocalizedStringTransformerTest extends TestCase
 
     public function nanRepresentationProvider()
     {
-        return array(
-            array('nan'),
-            array('NaN'), // see https://github.com/symfony/symfony/issues/3161
-            array('NAN'),
-        );
+        return [
+            ['nan'],
+            ['NaN'], // see https://github.com/symfony/symfony/issues/3161
+            ['NAN'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
index 4d7909d3a6..5c984fe5b0 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/PercentToLocalizedStringTransformerTest.php
@@ -226,8 +226,8 @@ class PercentToLocalizedStringTransformerTest extends TestCase
         $formatter->setAttribute(\NumberFormatter::GROUPING_USED, false);
 
         $transformer = $this->getMockBuilder('Symfony\Component\Form\Extension\Core\DataTransformer\PercentToLocalizedStringTransformer')
-            ->setMethods(array('getNumberFormatter'))
-            ->setConstructorArgs(array(1, 'integer'))
+            ->setMethods(['getNumberFormatter'])
+            ->setConstructorArgs([1, 'integer'])
             ->getMock();
         $transformer->expects($this->any())
             ->method('getNumberFormatter')
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
index 5c1d56264e..3ef681da66 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/DataTransformer/ValueToDuplicatesTransformerTest.php
@@ -20,7 +20,7 @@ class ValueToDuplicatesTransformerTest extends TestCase
 
     protected function setUp()
     {
-        $this->transformer = new ValueToDuplicatesTransformer(array('a', 'b', 'c'));
+        $this->transformer = new ValueToDuplicatesTransformer(['a', 'b', 'c']);
     }
 
     protected function tearDown()
@@ -30,77 +30,77 @@ class ValueToDuplicatesTransformerTest extends TestCase
 
     public function testTransform()
     {
-        $output = array(
+        $output = [
             'a' => 'Foo',
             'b' => 'Foo',
             'c' => 'Foo',
-        );
+        ];
 
         $this->assertSame($output, $this->transformer->transform('Foo'));
     }
 
     public function testTransformEmpty()
     {
-        $output = array(
+        $output = [
             'a' => null,
             'b' => null,
             'c' => null,
-        );
+        ];
 
         $this->assertSame($output, $this->transformer->transform(null));
     }
 
     public function testReverseTransform()
     {
-        $input = array(
+        $input = [
             'a' => 'Foo',
             'b' => 'Foo',
             'c' => 'Foo',
-        );
+        ];
 
         $this->assertSame('Foo', $this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformCompletelyEmpty()
     {
-        $input = array(
+        $input = [
             'a' => '',
             'b' => '',
             'c' => '',
-        );
+        ];
 
         $this->assertNull($this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformCompletelyNull()
     {
-        $input = array(
+        $input = [
             'a' => null,
             'b' => null,
             'c' => null,
-        );
+        ];
 
         $this->assertNull($this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformEmptyArray()
     {
-        $input = array(
-            'a' => array(),
-            'b' => array(),
-            'c' => array(),
-        );
+        $input = [
+            'a' => [],
+            'b' => [],
+            'c' => [],
+        ];
 
         $this->assertNull($this->transformer->reverseTransform($input));
     }
 
     public function testReverseTransformZeroString()
     {
-        $input = array(
+        $input = [
             'a' => '0',
             'b' => '0',
             'c' => '0',
-        );
+        ];
 
         $this->assertSame('0', $this->transformer->reverseTransform($input));
     }
@@ -110,11 +110,11 @@ class ValueToDuplicatesTransformerTest extends TestCase
      */
     public function testReverseTransformPartiallyNull()
     {
-        $input = array(
+        $input = [
             'a' => 'Foo',
             'b' => 'Foo',
             'c' => null,
-        );
+        ];
 
         $this->transformer->reverseTransform($input);
     }
@@ -124,11 +124,11 @@ class ValueToDuplicatesTransformerTest extends TestCase
      */
     public function testReverseTransformDifferences()
     {
-        $input = array(
+        $input = [
             'a' => 'Foo',
             'b' => 'Bar',
             'c' => 'Foo',
-        );
+        ];
 
         $this->transformer->reverseTransform($input);
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
index 454aaa8561..7861e12197 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/FixUrlProtocolListenerTest.php
@@ -43,13 +43,13 @@ class FixUrlProtocolListenerTest extends TestCase
 
     public function provideUrlsWithSupportedProtocols()
     {
-        return array(
-            array('ftp://www.symfony.com'),
-            array('chrome-extension://foo'),
-            array('h323://foo'),
-            array('iris.beep://foo'),
-            array('foo+bar://foo'),
-        );
+        return [
+            ['ftp://www.symfony.com'],
+            ['chrome-extension://foo'],
+            ['h323://foo'],
+            ['iris.beep://foo'],
+            ['foo+bar://foo'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
index 627d7bb3f1..41b7d18bd5 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/MergeCollectionListenerTest.php
@@ -51,20 +51,20 @@ abstract class MergeCollectionListenerTest extends TestCase
 
     public function getBooleanMatrix1()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     public function getBooleanMatrix2()
     {
-        return array(
-            array(true, true),
-            array(true, false),
-            array(false, true),
-            array(false, false),
-        );
+        return [
+            [true, true],
+            [true, false],
+            [false, true],
+            [false, false],
+        ];
     }
 
     abstract protected function getData(array $data);
@@ -74,8 +74,8 @@ abstract class MergeCollectionListenerTest extends TestCase
      */
     public function testAddExtraEntriesIfAllowAdd($allowDelete)
     {
-        $originalData = $this->getData(array(1 => 'second'));
-        $newData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $originalData = $this->getData([1 => 'second']);
+        $newData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $listener = new MergeCollectionListener(true, $allowDelete);
 
@@ -98,8 +98,8 @@ abstract class MergeCollectionListenerTest extends TestCase
      */
     public function testAddExtraEntriesIfAllowAddDontOverwriteExistingIndices($allowDelete)
     {
-        $originalData = $this->getData(array(1 => 'first'));
-        $newData = $this->getData(array(0 => 'first', 1 => 'second'));
+        $originalData = $this->getData([1 => 'first']);
+        $newData = $this->getData([0 => 'first', 1 => 'second']);
 
         $listener = new MergeCollectionListener(true, $allowDelete);
 
@@ -114,7 +114,7 @@ abstract class MergeCollectionListenerTest extends TestCase
         }
 
         // The original object matches the new object
-        $this->assertEquals($this->getData(array(1 => 'first', 2 => 'second')), $event->getData());
+        $this->assertEquals($this->getData([1 => 'first', 2 => 'second']), $event->getData());
     }
 
     /**
@@ -122,9 +122,9 @@ abstract class MergeCollectionListenerTest extends TestCase
      */
     public function testDoNothingIfNotAllowAdd($allowDelete)
     {
-        $originalDataArray = array(1 => 'second');
+        $originalDataArray = [1 => 'second'];
         $originalData = $this->getData($originalDataArray);
-        $newData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $newData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $listener = new MergeCollectionListener(false, $allowDelete);
 
@@ -147,8 +147,8 @@ abstract class MergeCollectionListenerTest extends TestCase
      */
     public function testRemoveMissingEntriesIfAllowDelete($allowAdd)
     {
-        $originalData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
-        $newData = $this->getData(array(1 => 'second'));
+        $originalData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
+        $newData = $this->getData([1 => 'second']);
 
         $listener = new MergeCollectionListener($allowAdd, true);
 
@@ -171,9 +171,9 @@ abstract class MergeCollectionListenerTest extends TestCase
      */
     public function testDoNothingIfNotAllowDelete($allowAdd)
     {
-        $originalDataArray = array(0 => 'first', 1 => 'second', 2 => 'third');
+        $originalDataArray = [0 => 'first', 1 => 'second', 2 => 'third'];
         $originalData = $this->getData($originalDataArray);
-        $newData = $this->getData(array(1 => 'second'));
+        $newData = $this->getData([1 => 'second']);
 
         $listener = new MergeCollectionListener($allowAdd, false);
 
@@ -205,7 +205,7 @@ abstract class MergeCollectionListenerTest extends TestCase
 
     public function testDealWithNullData()
     {
-        $originalData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $originalData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
         $newData = null;
 
         $listener = new MergeCollectionListener(false, false);
@@ -224,7 +224,7 @@ abstract class MergeCollectionListenerTest extends TestCase
     public function testDealWithNullOriginalDataIfAllowAdd($allowDelete)
     {
         $originalData = null;
-        $newData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $newData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $listener = new MergeCollectionListener(true, $allowDelete);
 
@@ -242,7 +242,7 @@ abstract class MergeCollectionListenerTest extends TestCase
     public function testDontDealWithNullOriginalDataIfNotAllowAdd($allowDelete)
     {
         $originalData = null;
-        $newData = $this->getData(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $newData = $this->getData([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $listener = new MergeCollectionListener(false, $allowDelete);
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
index 017c1bdc04..daa3a8de09 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/EventListener/ResizeFormListenerTest.php
@@ -70,16 +70,16 @@ class ResizeFormListenerTest extends TestCase
 
         $this->factory->expects($this->at(0))
             ->method('createNamed')
-            ->with(1, 'text', null, array('property_path' => '[1]', 'attr' => array('maxlength' => 10), 'auto_initialize' => false))
+            ->with(1, 'text', null, ['property_path' => '[1]', 'attr' => ['maxlength' => 10], 'auto_initialize' => false])
             ->will($this->returnValue($this->getForm('1')));
         $this->factory->expects($this->at(1))
             ->method('createNamed')
-            ->with(2, 'text', null, array('property_path' => '[2]', 'attr' => array('maxlength' => 10), 'auto_initialize' => false))
+            ->with(2, 'text', null, ['property_path' => '[2]', 'attr' => ['maxlength' => 10], 'auto_initialize' => false])
             ->will($this->returnValue($this->getForm('2')));
 
-        $data = array(1 => 'string', 2 => 'string');
+        $data = [1 => 'string', 2 => 'string'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array('attr' => array('maxlength' => 10)), false, false);
+        $listener = new ResizeFormListener('text', ['attr' => ['maxlength' => 10]], false, false);
         $listener->preSetData($event);
 
         $this->assertFalse($this->form->has('0'));
@@ -94,7 +94,7 @@ class ResizeFormListenerTest extends TestCase
     {
         $data = 'no array or traversable';
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->preSetData($event);
     }
 
@@ -104,7 +104,7 @@ class ResizeFormListenerTest extends TestCase
 
         $data = null;
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->preSetData($event);
     }
 
@@ -114,12 +114,12 @@ class ResizeFormListenerTest extends TestCase
 
         $this->factory->expects($this->once())
             ->method('createNamed')
-            ->with(1, 'text', null, array('property_path' => '[1]', 'attr' => array('maxlength' => 10), 'auto_initialize' => false))
+            ->with(1, 'text', null, ['property_path' => '[1]', 'attr' => ['maxlength' => 10], 'auto_initialize' => false])
             ->will($this->returnValue($this->getForm('1')));
 
-        $data = array(0 => 'string', 1 => 'string');
+        $data = [0 => 'string', 1 => 'string'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array('attr' => array('maxlength' => 10)), true, false);
+        $listener = new ResizeFormListener('text', ['attr' => ['maxlength' => 10]], true, false);
         $listener->preSubmit($event);
 
         $this->assertTrue($this->form->has('0'));
@@ -131,9 +131,9 @@ class ResizeFormListenerTest extends TestCase
         $this->form->add($this->getForm('0'));
         $this->form->add($this->getForm('1'));
 
-        $data = array(0 => 'string');
+        $data = [0 => 'string'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->preSubmit($event);
 
         $this->assertTrue($this->form->has('0'));
@@ -145,9 +145,9 @@ class ResizeFormListenerTest extends TestCase
     {
         $this->form->add($this->getForm('0'));
 
-        $data = array();
+        $data = [];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->preSubmit($event);
 
         $this->assertFalse($this->form->has('0'));
@@ -158,9 +158,9 @@ class ResizeFormListenerTest extends TestCase
         $this->form->add($this->getForm('0'));
         $this->form->add($this->getForm('1'));
 
-        $data = array(0 => 'string', 2 => 'string');
+        $data = [0 => 'string', 2 => 'string'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->preSubmit($event);
 
         $this->assertTrue($this->form->has('0'));
@@ -172,7 +172,7 @@ class ResizeFormListenerTest extends TestCase
     {
         $data = 'no array or traversable';
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->preSubmit($event);
 
         $this->assertFalse($this->form->has('1'));
@@ -184,7 +184,7 @@ class ResizeFormListenerTest extends TestCase
 
         $data = null;
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->preSubmit($event);
 
         $this->assertFalse($this->form->has('1'));
@@ -197,7 +197,7 @@ class ResizeFormListenerTest extends TestCase
 
         $data = '';
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->preSubmit($event);
 
         $this->assertFalse($this->form->has('1'));
@@ -207,21 +207,21 @@ class ResizeFormListenerTest extends TestCase
     {
         $this->form->add($this->getForm('1'));
 
-        $data = array(0 => 'first', 1 => 'second', 2 => 'third');
+        $data = [0 => 'first', 1 => 'second', 2 => 'third'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->onSubmit($event);
 
-        $this->assertEquals(array(1 => 'second'), $event->getData());
+        $this->assertEquals([1 => 'second'], $event->getData());
     }
 
     public function testOnSubmitNormDataDoesNothingIfNotAllowDelete()
     {
         $this->form->add($this->getForm('1'));
 
-        $data = array(0 => 'first', 1 => 'second', 2 => 'third');
+        $data = [0 => 'first', 1 => 'second', 2 => 'third'];
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->onSubmit($event);
 
         $this->assertEquals($data, $event->getData());
@@ -234,7 +234,7 @@ class ResizeFormListenerTest extends TestCase
     {
         $data = 'no array or traversable';
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, false);
+        $listener = new ResizeFormListener('text', [], false, false);
         $listener->onSubmit($event);
     }
 
@@ -244,19 +244,19 @@ class ResizeFormListenerTest extends TestCase
 
         $data = null;
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->onSubmit($event);
 
-        $this->assertEquals(array(), $event->getData());
+        $this->assertEquals([], $event->getData());
     }
 
     public function testOnSubmitDealsWithObjectBackedIteratorAggregate()
     {
         $this->form->add($this->getForm('1'));
 
-        $data = new \ArrayObject(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $data = new \ArrayObject([0 => 'first', 1 => 'second', 2 => 'third']);
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->onSubmit($event);
 
         $this->assertArrayNotHasKey(0, $event->getData());
@@ -267,9 +267,9 @@ class ResizeFormListenerTest extends TestCase
     {
         $this->form->add($this->getForm('1'));
 
-        $data = new ArrayCollection(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $data = new ArrayCollection([0 => 'first', 1 => 'second', 2 => 'third']);
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true);
+        $listener = new ResizeFormListener('text', [], false, true);
         $listener->onSubmit($event);
 
         $this->assertArrayNotHasKey(0, $event->getData());
@@ -278,24 +278,24 @@ class ResizeFormListenerTest extends TestCase
 
     public function testOnSubmitDeleteEmptyNotCompoundEntriesIfAllowDelete()
     {
-        $this->form->setData(array('0' => 'first', '1' => 'second'));
+        $this->form->setData(['0' => 'first', '1' => 'second']);
         $this->form->add($this->getForm('0'));
         $this->form->add($this->getForm('1'));
 
-        $data = array(0 => 'first', 1 => '');
+        $data = [0 => 'first', 1 => ''];
         foreach ($data as $child => $dat) {
             $this->form->get($child)->setData($dat);
         }
         $event = new FormEvent($this->form, $data);
-        $listener = new ResizeFormListener('text', array(), false, true, true);
+        $listener = new ResizeFormListener('text', [], false, true, true);
         $listener->onSubmit($event);
 
-        $this->assertEquals(array(0 => 'first'), $event->getData());
+        $this->assertEquals([0 => 'first'], $event->getData());
     }
 
     public function testOnSubmitDeleteEmptyCompoundEntriesIfAllowDelete()
     {
-        $this->form->setData(array('0' => array('name' => 'John'), '1' => array('name' => 'Jane')));
+        $this->form->setData(['0' => ['name' => 'John'], '1' => ['name' => 'Jane']]);
         $form1 = $this->getBuilder('0')
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
@@ -309,7 +309,7 @@ class ResizeFormListenerTest extends TestCase
         $this->form->add($form1);
         $this->form->add($form2);
 
-        $data = array('0' => array('name' => 'John'), '1' => array('name' => ''));
+        $data = ['0' => ['name' => 'John'], '1' => ['name' => '']];
         foreach ($data as $child => $dat) {
             $this->form->get($child)->setData($dat);
         }
@@ -317,9 +317,9 @@ class ResizeFormListenerTest extends TestCase
         $callback = function ($data) {
             return '' === $data['name'];
         };
-        $listener = new ResizeFormListener('text', array(), false, true, $callback);
+        $listener = new ResizeFormListener('text', [], false, true, $callback);
         $listener->onSubmit($event);
 
-        $this->assertEquals(array('0' => array('name' => 'John')), $event->getData());
+        $this->assertEquals(['0' => ['name' => 'John']], $event->getData());
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/BaseTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/BaseTypeTest.php
index da3f48b486..92eff38669 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/BaseTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/BaseTypeTest.php
@@ -22,7 +22,7 @@ abstract class BaseTypeTest extends TypeTestCase
 
     public function testPassDisabledAsOption()
     {
-        $form = $this->factory->create($this->getTestedType(), null, array('disabled' => true));
+        $form = $this->factory->create($this->getTestedType(), null, ['disabled' => true]);
 
         $this->assertTrue($form->isDisabled());
     }
@@ -73,9 +73,9 @@ abstract class BaseTypeTest extends TypeTestCase
 
     public function testPassTranslationDomainToView()
     {
-        $view = $this->factory->create($this->getTestedType(), null, array(
+        $view = $this->factory->create($this->getTestedType(), null, [
             'translation_domain' => 'domain',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('domain', $view->vars['translation_domain']);
@@ -84,9 +84,9 @@ abstract class BaseTypeTest extends TypeTestCase
     public function testInheritTranslationDomainFromParent()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->add('child', $this->getTestedType())
             ->getForm()
             ->createView();
@@ -97,12 +97,12 @@ abstract class BaseTypeTest extends TypeTestCase
     public function testPreferOwnTranslationDomain()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'parent_domain',
-            ))
-            ->add('child', $this->getTestedType(), array(
+            ])
+            ->add('child', $this->getTestedType(), [
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -121,7 +121,7 @@ abstract class BaseTypeTest extends TypeTestCase
 
     public function testPassLabelToView()
     {
-        $view = $this->factory->createNamed('__test___field', $this->getTestedType(), null, array('label' => 'My label'))
+        $view = $this->factory->createNamed('__test___field', $this->getTestedType(), null, ['label' => 'My label'])
             ->createView();
 
         $this->assertSame('My label', $view->vars['label']);
@@ -150,7 +150,7 @@ abstract class BaseTypeTest extends TypeTestCase
         $builder = $this->factory->createBuilder($this->getTestedType());
 
         if ($builder->getCompound()) {
-            $emptyData = array();
+            $emptyData = [];
             foreach ($builder as $field) {
                 // empty children should map null (model data) in the compound view data
                 $emptyData[$field->getName()] = null;
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/BirthdayTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/BirthdayTypeTest.php
index 7f9130b90e..ffadf8c844 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/BirthdayTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/BirthdayTypeTest.php
@@ -23,8 +23,8 @@ class BirthdayTypeTest extends DateTypeTest
      */
     public function testSetInvalidYearsOption()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'years' => 'bad value',
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CheckboxTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CheckboxTypeTest.php
index b67f3e8029..d8f0cba025 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CheckboxTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CheckboxTypeTest.php
@@ -28,7 +28,7 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testPassValueToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array('value' => 'foobar'))
+        $view = $this->factory->create(static::TESTED_TYPE, null, ['value' => 'foobar'])
             ->createView();
 
         $this->assertEquals('foobar', $view->vars['value']);
@@ -45,7 +45,7 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testCheckedIfDataTrueWithEmptyValue()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array('value' => ''))
+        $view = $this->factory->create(static::TESTED_TYPE, null, ['value' => ''])
             ->setData(true)
             ->createView();
 
@@ -63,9 +63,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithValueChecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => 'foobar',
-        ));
+        ]);
         $form->submit('foobar');
 
         $this->assertTrue($form->getData());
@@ -74,9 +74,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithRandomValueChecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => 'foobar',
-        ));
+        ]);
         $form->submit('krixikraxi');
 
         $this->assertTrue($form->getData());
@@ -85,9 +85,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithValueUnchecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => 'foobar',
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertFalse($form->getData());
@@ -96,9 +96,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithEmptyValueChecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => '',
-        ));
+        ]);
         $form->submit('');
 
         $this->assertTrue($form->getData());
@@ -107,9 +107,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithEmptyValueUnchecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => '',
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertFalse($form->getData());
@@ -118,9 +118,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithEmptyValueAndFalseUnchecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => '',
-        ));
+        ]);
         $form->submit(false);
 
         $this->assertFalse($form->getData());
@@ -129,9 +129,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitWithEmptyValueAndTrueChecked()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'value' => '',
-        ));
+        ]);
         $form->submit(true);
 
         $this->assertTrue($form->getData());
@@ -167,10 +167,10 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function provideCustomModelTransformerData()
     {
-        return array(
-            array('checked', true),
-            array('unchecked', false),
-        );
+        return [
+            ['checked', true],
+            ['unchecked', false],
+        ];
     }
 
     /**
@@ -178,20 +178,20 @@ class CheckboxTypeTest extends BaseTypeTest
      */
     public function testCustomFalseValues($falseValue)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'false_values' => array($falseValue),
-        ));
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'false_values' => [$falseValue],
+        ]);
         $form->submit($falseValue);
         $this->assertFalse($form->getData());
     }
 
     public function provideCustomFalseValues()
     {
-        return array(
-            array(''),
-            array('false'),
-            array('0'),
-        );
+        return [
+            [''],
+            ['false'],
+            ['0'],
+        ];
     }
 
     /**
@@ -200,9 +200,9 @@ class CheckboxTypeTest extends BaseTypeTest
     public function testDontAllowNonArrayFalseValues()
     {
         $this->expectExceptionMessageRegExp('/"false_values" with value "invalid" is expected to be of type "array"/');
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'false_values' => 'invalid',
-        ));
+        ]);
     }
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
@@ -212,9 +212,9 @@ class CheckboxTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'empty', $expectedData = true)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // view data is transformed to the string true value
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypePerformanceTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypePerformanceTest.php
index 3e0ea22f9d..3616a139c1 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypePerformanceTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypePerformanceTest.php
@@ -30,9 +30,9 @@ class ChoiceTypePerformanceTest extends FormPerformanceTestCase
         $choices = range(1, 300);
 
         for ($i = 0; $i < 100; ++$i) {
-            $this->factory->create('Symfony\Component\Form\Extension\Core\Type\ChoiceType', mt_rand(1, 400), array(
+            $this->factory->create('Symfony\Component\Form\Extension\Core\Type\ChoiceType', mt_rand(1, 400), [
                 'choices' => $choices,
-            ));
+            ]);
         }
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
index cb4d182b30..4a7f006f6f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
@@ -18,59 +18,59 @@ class ChoiceTypeTest extends BaseTypeTest
 {
     const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\ChoiceType';
 
-    private $choices = array(
+    private $choices = [
         'Bernhard' => 'a',
         'Fabien' => 'b',
         'Kris' => 'c',
         'Jon' => 'd',
         'Roman' => 'e',
-    );
+    ];
 
-    private $scalarChoices = array(
+    private $scalarChoices = [
         'Yes' => true,
         'No' => false,
         'n/a' => '',
-    );
+    ];
 
-    private $booleanChoicesWithNull = array(
+    private $booleanChoicesWithNull = [
         'Yes' => true,
         'No' => false,
         'n/a' => null,
-    );
+    ];
 
-    private $numericChoicesFlipped = array(
+    private $numericChoicesFlipped = [
         0 => 'Bernhard',
         1 => 'Fabien',
         2 => 'Kris',
         3 => 'Jon',
         4 => 'Roman',
-    );
+    ];
 
     private $objectChoices;
 
-    protected $groupedChoices = array(
-        'Symfony' => array(
+    protected $groupedChoices = [
+        'Symfony' => [
             'Bernhard' => 'a',
             'Fabien' => 'b',
             'Kris' => 'c',
-        ),
-        'Doctrine' => array(
+        ],
+        'Doctrine' => [
             'Jon' => 'd',
             'Roman' => 'e',
-        ),
-    );
+        ],
+    ];
 
     protected function setUp()
     {
         parent::setUp();
 
-        $this->objectChoices = array(
-            (object) array('id' => 1, 'name' => 'Bernhard'),
-            (object) array('id' => 2, 'name' => 'Fabien'),
-            (object) array('id' => 3, 'name' => 'Kris'),
-            (object) array('id' => 4, 'name' => 'Jon'),
-            (object) array('id' => 5, 'name' => 'Roman'),
-        );
+        $this->objectChoices = [
+            (object) ['id' => 1, 'name' => 'Bernhard'],
+            (object) ['id' => 2, 'name' => 'Fabien'],
+            (object) ['id' => 3, 'name' => 'Kris'],
+            (object) ['id' => 4, 'name' => 'Jon'],
+            (object) ['id' => 5, 'name' => 'Roman'],
+        ];
     }
 
     protected function tearDown()
@@ -85,9 +85,9 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testChoicesOptionExpectsArrayOrTraversable()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => new \stdClass(),
-        ));
+        ]);
     }
 
     /**
@@ -95,31 +95,31 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testChoiceLoaderOptionExpectsChoiceLoaderInterface()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'choice_loader' => new \stdClass(),
-        ));
+        ]);
     }
 
     public function testChoiceListAndChoicesCanBeEmpty()
     {
-        $this->assertInstanceOf('Symfony\Component\Form\FormInterface', $this->factory->create(static::TESTED_TYPE, null, array()));
+        $this->assertInstanceOf('Symfony\Component\Form\FormInterface', $this->factory->create(static::TESTED_TYPE, null, []));
     }
 
     public function testExpandedChoicesOptionsTurnIntoChildren()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'expanded' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
     }
 
     public function testChoiceListWithScalarValues()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->scalarChoices,
-        ))->createView();
+        ])->createView();
 
         $this->assertSame('1', $view->vars['choices'][0]->value);
         $this->assertSame('0', $view->vars['choices'][1]->value);
@@ -131,19 +131,19 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testChoiceListWithScalarValuesAndFalseAsPreSetData()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, false, array(
+        $view = $this->factory->create(static::TESTED_TYPE, false, [
             'choices' => $this->scalarChoices,
-        ))->createView();
+        ])->createView();
 
         $this->assertTrue($view->vars['is_selected']($view->vars['choices'][1]->value, $view->vars['value']), 'False value should be pre selected');
     }
 
     public function testExpandedChoiceListWithScalarValues()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->scalarChoices,
             'expanded' => true,
-        ))->createView();
+        ])->createView();
 
         $this->assertFalse($view->children[0]->vars['checked'], 'True value should not be pre selected');
         $this->assertFalse($view->children[1]->vars['checked'], 'False value should not be pre selected');
@@ -152,10 +152,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedChoiceListWithBooleanAndNullValues()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->booleanChoicesWithNull,
             'expanded' => true,
-        ))->createView();
+        ])->createView();
 
         $this->assertFalse($view->children[0]->vars['checked'], 'True value should not be pre selected');
         $this->assertFalse($view->children[1]->vars['checked'], 'False value should not be pre selected');
@@ -164,10 +164,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedChoiceListWithScalarValuesAndFalseAsPreSetData()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, false, array(
+        $view = $this->factory->create(static::TESTED_TYPE, false, [
             'choices' => $this->scalarChoices,
             'expanded' => true,
-        ))->createView();
+        ])->createView();
 
         $this->assertSame('1', $view->vars['choices'][0]->value);
         $this->assertSame('0', $view->vars['choices'][1]->value);
@@ -177,10 +177,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedChoiceListWithBooleanAndNullValuesAndFalseAsPreSetData()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, false, array(
+        $view = $this->factory->create(static::TESTED_TYPE, false, [
             'choices' => $this->booleanChoicesWithNull,
             'expanded' => true,
-        ))->createView();
+        ])->createView();
 
         $this->assertFalse($view->children[0]->vars['checked'], 'True value should not be pre selected');
         $this->assertTrue($view->children[1]->vars['checked'], 'False value should be pre selected');
@@ -189,12 +189,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderPresentOnNonRequiredExpandedSingleChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $this->assertArrayHasKey('placeholder', $form);
         $this->assertCount(\count($this->choices) + 1, $form, 'Each choice should become a new field');
@@ -202,12 +202,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderNotPresentIfRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $this->assertArrayNotHasKey('placeholder', $form);
         $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
@@ -215,12 +215,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderNotPresentIfMultiple()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $this->assertArrayNotHasKey('placeholder', $form);
         $this->assertCount(\count($this->choices), $form, 'Each choice should become a new field');
@@ -228,15 +228,15 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderNotPresentIfEmptyChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(
+            'choices' => [
                 'Empty' => '',
                 'Not empty' => 1,
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertArrayNotHasKey('placeholder', $form);
         $this->assertCount(2, $form, 'Each choice should become a new field');
@@ -244,16 +244,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderWithBooleanChoices()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'required' => false,
-            'choices' => array(
+            'choices' => [
                 'Yes' => true,
                 'No' => false,
-            ),
+            ],
             'placeholder' => 'Select an option',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('', $view->vars['value'], 'Value should be empty');
@@ -264,16 +264,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderWithBooleanChoicesWithFalseAsPreSetData()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, false, array(
+        $view = $this->factory->create(static::TESTED_TYPE, false, [
             'multiple' => false,
             'expanded' => false,
             'required' => false,
-            'choices' => array(
+            'choices' => [
                 'Yes' => true,
                 'No' => false,
-            ),
+            ],
             'placeholder' => 'Select an option',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('0', $view->vars['value'], 'Value should be "0"');
@@ -284,16 +284,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderWithExpandedBooleanChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(
+            'choices' => [
                 'Yes' => true,
                 'No' => false,
-            ),
+            ],
             'placeholder' => 'Select an option',
-        ));
+        ]);
 
         $this->assertArrayHasKey('placeholder', $form, 'Placeholder should be set');
         $this->assertCount(3, $form, 'Each choice should become a new field, placeholder included');
@@ -308,16 +308,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderWithExpandedBooleanChoicesAndWithFalseAsPreSetData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, false, array(
+        $form = $this->factory->create(static::TESTED_TYPE, false, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(
+            'choices' => [
                 'Yes' => true,
                 'No' => false,
-            ),
+            ],
             'placeholder' => 'Select an option',
-        ));
+        ]);
 
         $this->assertArrayHasKey('placeholder', $form, 'Placeholder should be set');
         $this->assertCount(3, $form, 'Each choice should become a new field, placeholder included');
@@ -332,12 +332,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedChoicesOptionsAreFlattened()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'expanded' => true,
             'choices' => $this->groupedChoices,
-        ));
+        ]);
 
-        $flattened = array();
+        $flattened = [];
         foreach ($this->groupedChoices as $choices) {
             $flattened = array_merge($flattened, array_keys($choices));
         }
@@ -351,20 +351,20 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedChoicesOptionsAreFlattenedObjectChoices()
     {
-        $obj1 = (object) array('id' => 1, 'name' => 'Bernhard');
-        $obj2 = (object) array('id' => 2, 'name' => 'Fabien');
-        $obj3 = (object) array('id' => 3, 'name' => 'Kris');
-        $obj4 = (object) array('id' => 4, 'name' => 'Jon');
-        $obj5 = (object) array('id' => 5, 'name' => 'Roman');
+        $obj1 = (object) ['id' => 1, 'name' => 'Bernhard'];
+        $obj2 = (object) ['id' => 2, 'name' => 'Fabien'];
+        $obj3 = (object) ['id' => 3, 'name' => 'Kris'];
+        $obj4 = (object) ['id' => 4, 'name' => 'Jon'];
+        $obj5 = (object) ['id' => 5, 'name' => 'Roman'];
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'expanded' => true,
-            'choices' => array(
-                'Symfony' => array($obj1, $obj2, $obj3),
-                'Doctrine' => array($obj4, $obj5),
-            ),
+            'choices' => [
+                'Symfony' => [$obj1, $obj2, $obj3],
+                'Doctrine' => [$obj4, $obj5],
+            ],
             'choice_name' => 'id',
-        ));
+        ]);
 
         $this->assertSame(5, $form->count(), 'Each nested choice should become a new field, not the groups');
         $this->assertTrue($form->has(1));
@@ -376,12 +376,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedCheckboxesAreNeverRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         foreach ($form as $child) {
             $this->assertFalse($child->isRequired());
@@ -390,12 +390,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedRadiosAreRequiredIfChoiceChildIsRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         foreach ($form as $child) {
             $this->assertTrue($child->isRequired());
@@ -404,12 +404,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testExpandedRadiosAreNotRequiredIfChoiceChildIsNotRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         foreach ($form as $child) {
             $this->assertFalse($child->isRequired());
@@ -418,11 +418,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpanded()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('b');
 
@@ -433,11 +433,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedInvalidChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('foobar');
 
@@ -448,11 +448,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -466,11 +466,11 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(null);
 
@@ -482,11 +482,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('');
 
@@ -497,16 +497,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedEmptyExplicitEmptyChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
-            'choices' => array(
+            'choices' => [
                 'Empty' => 'EMPTY_CHOICE',
-            ),
+            ],
             'choice_value' => function () {
                 return '';
             },
-        ));
+        ]);
 
         $form->submit('');
 
@@ -520,11 +520,11 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleNonExpandedEmptyNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit('');
 
@@ -535,11 +535,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedFalse()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(false);
 
@@ -553,11 +553,11 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleNonExpandedFalseNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(false);
 
@@ -568,13 +568,13 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleNonExpandedObjectChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ));
+        ]);
 
         // "id" value of the second entry
         $form->submit('2');
@@ -586,13 +586,13 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'empty', $expectedData = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             // empty data must match string choice value
-            'choices' => array($emptyData),
+            'choices' => [$emptyData],
             'empty_data' => $emptyData,
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -601,12 +601,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleChoiceWithEmptyDataAndInitialData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, 'initial', array(
+        $form = $this->factory->create(static::TESTED_TYPE, 'initial', [
             'multiple' => false,
             'expanded' => false,
-            'choices' => array('initial', 'test'),
+            'choices' => ['initial', 'test'],
             'empty_data' => 'test',
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -615,54 +615,54 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleChoiceWithEmptyData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
-            'choices' => array('test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     public function testSubmitMultipleChoiceWithEmptyDataAndInitialEmptyArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, array(), array(
+        $form = $this->factory->create(static::TESTED_TYPE, [], [
             'multiple' => true,
             'expanded' => false,
-            'choices' => array('test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     public function testSubmitMultipleChoiceWithEmptyDataAndInitialData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, array('initial'), array(
+        $form = $this->factory->create(static::TESTED_TYPE, ['initial'], [
             'multiple' => true,
             'expanded' => false,
-            'choices' => array('initial', 'test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['initial', 'test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     public function testSubmitSingleChoiceExpandedWithEmptyData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
-            'choices' => array('test'),
+            'choices' => ['test'],
             'empty_data' => 'test',
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -671,12 +671,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleChoiceExpandedWithEmptyDataAndInitialData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, 'initial', array(
+        $form = $this->factory->create(static::TESTED_TYPE, 'initial', [
             'multiple' => false,
             'expanded' => true,
-            'choices' => array('initial', 'test'),
+            'choices' => ['initial', 'test'],
             'empty_data' => 'test',
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -685,44 +685,44 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleChoiceExpandedWithEmptyData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
-            'choices' => array('test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     public function testSubmitMultipleChoiceExpandedWithEmptyDataAndInitialEmptyArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, array(), array(
+        $form = $this->factory->create(static::TESTED_TYPE, [], [
             'multiple' => true,
             'expanded' => true,
-            'choices' => array('test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     public function testSubmitMultipleChoiceExpandedWithEmptyDataAndInitialData()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, array('init'), array(
+        $form = $this->factory->create(static::TESTED_TYPE, ['init'], [
             'multiple' => true,
             'expanded' => true,
-            'choices' => array('init', 'test'),
-            'empty_data' => array('test'),
-        ));
+            'choices' => ['init', 'test'],
+            'empty_data' => ['test'],
+        ]);
 
         $form->submit(null);
 
-        $this->assertSame(array('test'), $form->getData());
+        $this->assertSame(['test'], $form->getData());
     }
 
     /**
@@ -730,11 +730,11 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testLegacyNullChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => false,
             'choices' => null,
-        ));
+        ]);
         $this->assertNull($form->getConfig()->getOption('choices'));
         $this->assertFalse($form->getConfig()->getOption('multiple'));
         $this->assertFalse($form->getConfig()->getOption('expanded'));
@@ -742,31 +742,31 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleNonExpanded()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array('a', 'b'));
+        $form->submit(['a', 'b']);
 
-        $this->assertEquals(array('a', 'b'), $form->getData());
-        $this->assertEquals(array('a', 'b'), $form->getViewData());
+        $this->assertEquals(['a', 'b'], $form->getData());
+        $this->assertEquals(['a', 'b'], $form->getViewData());
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitMultipleNonExpandedEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array());
+        $form->submit([]);
 
-        $this->assertSame(array(), $form->getData());
-        $this->assertSame(array(), $form->getViewData());
+        $this->assertSame([], $form->getData());
+        $this->assertSame([], $form->getViewData());
         $this->assertTrue($form->isSynchronized());
     }
 
@@ -775,26 +775,26 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitMultipleNonExpandedEmptyNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
-        $form->submit(array());
+        $form->submit([]);
 
-        $this->assertSame(array(), $form->getData());
-        $this->assertSame(array(), $form->getViewData());
+        $this->assertSame([], $form->getData());
+        $this->assertSame([], $form->getViewData());
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitMultipleNonExpandedInvalidScalarChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('foobar');
 
@@ -805,44 +805,44 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleNonExpandedInvalidArrayChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array('a', 'foobar'));
+        $form->submit(['a', 'foobar']);
 
         $this->assertNull($form->getData());
-        $this->assertEquals(array('a', 'foobar'), $form->getViewData());
+        $this->assertEquals(['a', 'foobar'], $form->getViewData());
         $this->assertFalse($form->isSynchronized());
     }
 
     public function testSubmitMultipleNonExpandedObjectChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ));
+        ]);
 
-        $form->submit(array('2', '3'));
+        $form->submit(['2', '3']);
 
-        $this->assertEquals(array($this->objectChoices[1], $this->objectChoices[2]), $form->getData());
-        $this->assertEquals(array('2', '3'), $form->getViewData());
+        $this->assertEquals([$this->objectChoices[1], $this->objectChoices[2]], $form->getData());
+        $this->assertEquals(['2', '3'], $form->getViewData());
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('b');
 
@@ -865,12 +865,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleExpandedRequiredInvalidChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('foobar');
 
@@ -893,12 +893,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleExpandedNonRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('b');
 
@@ -923,12 +923,12 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleExpandedNonRequiredInvalidChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('foobar');
 
@@ -951,18 +951,18 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleExpandedRequiredNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(null);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertFalse($form[0]->getData());
@@ -982,35 +982,35 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedRequiredNullNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(null);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedRequiredEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('');
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertFalse($form[0]->getData());
@@ -1030,35 +1030,35 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedRequiredEmptyNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit('');
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedRequiredFalse()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(false);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertFalse($form[0]->getData());
@@ -1078,35 +1078,35 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedRequiredFalseNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => true,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(false);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedNonRequiredNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(null);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertTrue($form['placeholder']->getData());
@@ -1128,35 +1128,35 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedNonRequiredNullNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(null);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedNonRequiredEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('');
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertTrue($form['placeholder']->getData());
@@ -1178,35 +1178,35 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedNonRequiredEmptyNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit('');
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedNonRequiredFalse()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit(false);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
 
         $this->assertTrue($form['placeholder']->getData());
@@ -1228,31 +1228,31 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitSingleExpandedNonRequiredFalseNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'required' => false,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
         $form->submit(false);
 
         $this->assertNull($form->getData());
         $this->assertSame('', $form->getViewData(), 'View data should always be a string');
-        $this->assertSame(array(), $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
+        $this->assertSame([], $form->getExtraData(), 'ChoiceType is compound when expanded, extra data should always be an array');
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitSingleExpandedWithEmptyChild()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
-            'choices' => array(
+            'choices' => [
                 'Empty' => '',
                 'Not empty' => 1,
-            ),
-        ));
+            ],
+        ]);
 
         $form->submit('');
 
@@ -1267,13 +1267,13 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitSingleExpandedObjectChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'expanded' => true,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ));
+        ]);
 
         $form->submit('2');
 
@@ -1294,16 +1294,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleExpanded()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array('a', 'c'));
+        $form->submit(['a', 'c']);
 
-        $this->assertSame(array('a', 'c'), $form->getData());
-        $this->assertSame(array('a', 'c'), $form->getViewData());
+        $this->assertSame(['a', 'c'], $form->getData());
+        $this->assertSame(['a', 'c'], $form->getViewData());
         $this->assertEmpty($form->getExtraData());
         $this->assertTrue($form->isSynchronized());
 
@@ -1321,11 +1321,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleExpandedInvalidScalarChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
         $form->submit('foobar');
 
@@ -1348,16 +1348,16 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleExpandedInvalidArrayChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array('a', 'foobar'));
+        $form->submit(['a', 'foobar']);
 
         $this->assertNull($form->getData());
-        $this->assertSame(array('a', 'foobar'), $form->getViewData());
+        $this->assertSame(['a', 'foobar'], $form->getViewData());
         $this->assertEmpty($form->getExtraData());
         $this->assertFalse($form->isSynchronized());
 
@@ -1375,15 +1375,15 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleExpandedEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'choices' => $this->choices,
-        ));
+        ]);
 
-        $form->submit(array());
+        $form->submit([]);
 
-        $this->assertSame(array(), $form->getData());
+        $this->assertSame([], $form->getData());
         $this->assertTrue($form->isSynchronized());
 
         $this->assertFalse($form[0]->getData());
@@ -1403,33 +1403,33 @@ class ChoiceTypeTest extends BaseTypeTest
     // choices are available.
     public function testSubmitMultipleExpandedEmptyNoChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
-            'choices' => array(),
-        ));
+            'choices' => [],
+        ]);
 
-        $form->submit(array());
+        $form->submit([]);
 
-        $this->assertSame(array(), $form->getData());
+        $this->assertSame([], $form->getData());
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSubmitMultipleExpandedWithEmptyChild()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
-            'choices' => array(
+            'choices' => [
                 'Empty' => '',
                 'Not Empty' => 1,
                 'Not Empty 2' => 2,
-            ),
-        ));
+            ],
+        ]);
 
-        $form->submit(array('', '2'));
+        $form->submit(['', '2']);
 
-        $this->assertSame(array('', 2), $form->getData());
+        $this->assertSame(['', 2], $form->getData());
         $this->assertTrue($form->isSynchronized());
 
         $this->assertTrue($form[0]->getData());
@@ -1442,17 +1442,17 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleExpandedObjectChoices()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => true,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ));
+        ]);
 
-        $form->submit(array('1', '2'));
+        $form->submit(['1', '2']);
 
-        $this->assertSame(array($this->objectChoices[0], $this->objectChoices[1]), $form->getData());
+        $this->assertSame([$this->objectChoices[0], $this->objectChoices[1]], $form->getData());
         $this->assertTrue($form->isSynchronized());
 
         $this->assertTrue($form[0]->getData());
@@ -1469,25 +1469,25 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testSubmitMultipleChoicesInts()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'choices' => array_flip($this->numericChoicesFlipped),
-        ));
+        ]);
 
-        $form->submit(array(1, 2));
+        $form->submit([1, 2]);
 
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testSingleSelectedObjectChoices()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, $this->objectChoices[3], array(
+        $view = $this->factory->create(static::TESTED_TYPE, $this->objectChoices[3], [
             'multiple' => false,
             'expanded' => false,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ))
+        ])
             ->createView();
 
         /** @var callable $selectedChecker */
@@ -1499,13 +1499,13 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testMultipleSelectedObjectChoices()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, array($this->objectChoices[3]), array(
+        $view = $this->factory->create(static::TESTED_TYPE, [$this->objectChoices[3]], [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->objectChoices,
             'choice_label' => 'name',
             'choice_value' => 'id',
-        ))
+        ])
             ->createView();
 
         /** @var callable $selectedChecker */
@@ -1517,9 +1517,9 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassRequiredToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertTrue($view->vars['required']);
@@ -1527,10 +1527,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassNonRequiredToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertFalse($view->vars['required']);
@@ -1538,10 +1538,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassMultipleToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertTrue($view->vars['multiple']);
@@ -1549,10 +1549,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassExpandedToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'expanded' => true,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertTrue($view->vars['expanded']);
@@ -1560,9 +1560,9 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view->vars['choice_translation_domain']);
@@ -1570,10 +1570,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testChoiceTranslationDomainWithTrueValueToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->choices,
             'choice_translation_domain' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view->vars['choice_translation_domain']);
@@ -1581,10 +1581,10 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testDefaultChoiceTranslationDomainIsSameAsTranslationDomainToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->choices,
             'translation_domain' => 'foo',
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('foo', $view->vars['choice_translation_domain']);
@@ -1593,9 +1593,9 @@ class ChoiceTypeTest extends BaseTypeTest
     public function testInheritChoiceTranslationDomainFromParent()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->add('child', static::TESTED_TYPE)
             ->getForm()
             ->createView();
@@ -1605,11 +1605,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderIsNullByDefaultIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'required' => true,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view->vars['placeholder']);
@@ -1617,11 +1617,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPlaceholderIsEmptyStringByDefaultIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => false,
             'required' => false,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('', $view->vars['placeholder']);
@@ -1632,13 +1632,13 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testPassPlaceholderToView($multiple, $expanded, $required, $placeholder, $viewValue)
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => $multiple,
             'expanded' => $expanded,
             'required' => $required,
             'placeholder' => $placeholder,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertSame($viewValue, $view->vars['placeholder']);
@@ -1650,13 +1650,13 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testDontPassPlaceholderIfContainedInChoices($multiple, $expanded, $required, $placeholder, $viewValue)
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => $multiple,
             'expanded' => $expanded,
             'required' => $required,
             'placeholder' => $placeholder,
-            'choices' => array('Empty' => '', 'A' => 'a'),
-        ))
+            'choices' => ['Empty' => '', 'A' => 'a'],
+        ])
             ->createView();
 
         $this->assertNull($view->vars['placeholder']);
@@ -1665,138 +1665,138 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function getOptionsWithPlaceholder()
     {
-        return array(
+        return [
             // single non-expanded
-            array(false, false, false, 'foobar', 'foobar'),
-            array(false, false, false, '', ''),
-            array(false, false, false, null, null),
-            array(false, false, false, false, null),
-            array(false, false, true, 'foobar', 'foobar'),
-            array(false, false, true, '', ''),
-            array(false, false, true, null, null),
-            array(false, false, true, false, null),
+            [false, false, false, 'foobar', 'foobar'],
+            [false, false, false, '', ''],
+            [false, false, false, null, null],
+            [false, false, false, false, null],
+            [false, false, true, 'foobar', 'foobar'],
+            [false, false, true, '', ''],
+            [false, false, true, null, null],
+            [false, false, true, false, null],
             // single expanded
-            array(false, true, false, 'foobar', 'foobar'),
+            [false, true, false, 'foobar', 'foobar'],
             // radios should never have an empty label
-            array(false, true, false, '', 'None'),
-            array(false, true, false, null, null),
-            array(false, true, false, false, null),
+            [false, true, false, '', 'None'],
+            [false, true, false, null, null],
+            [false, true, false, false, null],
             // required radios should never have a placeholder
-            array(false, true, true, 'foobar', null),
-            array(false, true, true, '', null),
-            array(false, true, true, null, null),
-            array(false, true, true, false, null),
+            [false, true, true, 'foobar', null],
+            [false, true, true, '', null],
+            [false, true, true, null, null],
+            [false, true, true, false, null],
             // multiple non-expanded
-            array(true, false, false, 'foobar', null),
-            array(true, false, false, '', null),
-            array(true, false, false, null, null),
-            array(true, false, false, false, null),
-            array(true, false, true, 'foobar', null),
-            array(true, false, true, '', null),
-            array(true, false, true, null, null),
-            array(true, false, true, false, null),
+            [true, false, false, 'foobar', null],
+            [true, false, false, '', null],
+            [true, false, false, null, null],
+            [true, false, false, false, null],
+            [true, false, true, 'foobar', null],
+            [true, false, true, '', null],
+            [true, false, true, null, null],
+            [true, false, true, false, null],
             // multiple expanded
-            array(true, true, false, 'foobar', null),
-            array(true, true, false, '', null),
-            array(true, true, false, null, null),
-            array(true, true, false, false, null),
-            array(true, true, true, 'foobar', null),
-            array(true, true, true, '', null),
-            array(true, true, true, null, null),
-            array(true, true, true, false, null),
-        );
+            [true, true, false, 'foobar', null],
+            [true, true, false, '', null],
+            [true, true, false, null, null],
+            [true, true, false, false, null],
+            [true, true, true, 'foobar', null],
+            [true, true, true, '', null],
+            [true, true, true, null, null],
+            [true, true, true, false, null],
+        ];
     }
 
     public function testPassChoicesToView()
     {
-        $choices = array('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd');
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $choices = ['A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd'];
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $choices,
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView('a', 'a', 'A'),
             new ChoiceView('b', 'b', 'B'),
             new ChoiceView('c', 'c', 'C'),
             new ChoiceView('d', 'd', 'D'),
-        ), $view->vars['choices']);
+        ], $view->vars['choices']);
     }
 
     public function testPassPreferredChoicesToView()
     {
-        $choices = array('A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd');
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $choices = ['A' => 'a', 'B' => 'b', 'C' => 'c', 'D' => 'd'];
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $choices,
-            'preferred_choices' => array('b', 'd'),
-        ))
+            'preferred_choices' => ['b', 'd'],
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             0 => new ChoiceView('a', 'a', 'A'),
             2 => new ChoiceView('c', 'c', 'C'),
-        ), $view->vars['choices']);
-        $this->assertEquals(array(
+        ], $view->vars['choices']);
+        $this->assertEquals([
             1 => new ChoiceView('b', 'b', 'B'),
             3 => new ChoiceView('d', 'd', 'D'),
-        ), $view->vars['preferred_choices']);
+        ], $view->vars['preferred_choices']);
     }
 
     public function testPassHierarchicalChoicesToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->groupedChoices,
-            'preferred_choices' => array('b', 'd'),
-        ))
+            'preferred_choices' => ['b', 'd'],
+        ])
             ->createView();
 
-        $this->assertEquals(array(
-            'Symfony' => new ChoiceGroupView('Symfony', array(
+        $this->assertEquals([
+            'Symfony' => new ChoiceGroupView('Symfony', [
                 0 => new ChoiceView('a', 'a', 'Bernhard'),
                 2 => new ChoiceView('c', 'c', 'Kris'),
-            )),
-            'Doctrine' => new ChoiceGroupView('Doctrine', array(
+            ]),
+            'Doctrine' => new ChoiceGroupView('Doctrine', [
                 4 => new ChoiceView('e', 'e', 'Roman'),
-            )),
-        ), $view->vars['choices']);
-        $this->assertEquals(array(
-            'Symfony' => new ChoiceGroupView('Symfony', array(
+            ]),
+        ], $view->vars['choices']);
+        $this->assertEquals([
+            'Symfony' => new ChoiceGroupView('Symfony', [
                 1 => new ChoiceView('b', 'b', 'Fabien'),
-            )),
-            'Doctrine' => new ChoiceGroupView('Doctrine', array(
+            ]),
+            'Doctrine' => new ChoiceGroupView('Doctrine', [
                 3 => new ChoiceView('d', 'd', 'Jon'),
-            )),
-        ), $view->vars['preferred_choices']);
+            ]),
+        ], $view->vars['preferred_choices']);
     }
 
     public function testPassChoiceDataToView()
     {
-        $obj1 = (object) array('value' => 'a', 'label' => 'A');
-        $obj2 = (object) array('value' => 'b', 'label' => 'B');
-        $obj3 = (object) array('value' => 'c', 'label' => 'C');
-        $obj4 = (object) array('value' => 'd', 'label' => 'D');
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'choices' => array($obj1, $obj2, $obj3, $obj4),
+        $obj1 = (object) ['value' => 'a', 'label' => 'A'];
+        $obj2 = (object) ['value' => 'b', 'label' => 'B'];
+        $obj3 = (object) ['value' => 'c', 'label' => 'C'];
+        $obj4 = (object) ['value' => 'd', 'label' => 'D'];
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'choices' => [$obj1, $obj2, $obj3, $obj4],
             'choice_label' => 'label',
             'choice_value' => 'value',
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView($obj1, 'a', 'A'),
             new ChoiceView($obj2, 'b', 'B'),
             new ChoiceView($obj3, 'c', 'C'),
             new ChoiceView($obj4, 'd', 'D'),
-        ), $view->vars['choices']);
+        ], $view->vars['choices']);
     }
 
     public function testAdjustFullNameForMultipleNonExpanded()
     {
-        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'multiple' => true,
             'expanded' => false,
             'choices' => $this->choices,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('name[]', $view->vars['full_name']);
@@ -1805,26 +1805,26 @@ class ChoiceTypeTest extends BaseTypeTest
     // https://github.com/symfony/symfony/issues/3298
     public function testInitializeWithEmptyChoices()
     {
-        $this->assertInstanceOf('Symfony\Component\Form\FormInterface', $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
-            'choices' => array(),
-        )));
+        $this->assertInstanceOf('Symfony\Component\Form\FormInterface', $this->factory->createNamed('name', static::TESTED_TYPE, null, [
+            'choices' => [],
+        ]));
     }
 
     public function testInitializeWithDefaultObjectChoice()
     {
-        $obj1 = (object) array('value' => 'a', 'label' => 'A');
-        $obj2 = (object) array('value' => 'b', 'label' => 'B');
-        $obj3 = (object) array('value' => 'c', 'label' => 'C');
-        $obj4 = (object) array('value' => 'd', 'label' => 'D');
+        $obj1 = (object) ['value' => 'a', 'label' => 'A'];
+        $obj2 = (object) ['value' => 'b', 'label' => 'B'];
+        $obj3 = (object) ['value' => 'c', 'label' => 'C'];
+        $obj4 = (object) ['value' => 'd', 'label' => 'D'];
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'choices' => array($obj1, $obj2, $obj3, $obj4),
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'choices' => [$obj1, $obj2, $obj3, $obj4],
             'choice_label' => 'label',
             'choice_value' => 'value',
             // Used to break because "data_class" was inferred, which needs to
             // remain null in every case (because it refers to the view format)
             'data' => $obj3,
-        ));
+        ]);
 
         // Trigger data initialization
         $this->assertSame('c', $form->getViewData());
@@ -1840,12 +1840,12 @@ class ChoiceTypeTest extends BaseTypeTest
     public function testCustomChoiceTypeDoesNotInheritChoiceLabels()
     {
         $builder = $this->factory->createBuilder();
-        $builder->add('choice', static::TESTED_TYPE, array(
-                'choices' => array(
+        $builder->add('choice', static::TESTED_TYPE, [
+                'choices' => [
                     '1' => '1',
                     '2' => '2',
-                ),
-            )
+                ],
+            ]
         );
         $builder->add('subChoice', 'Symfony\Component\Form\Tests\Fixtures\ChoiceSubType');
         $form = $builder->getForm();
@@ -1861,11 +1861,11 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testSubmitInvalidNestedValue($multiple, $expanded, $submissionData)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'choices' => $this->choices,
             'multiple' => $multiple,
             'expanded' => $expanded,
-        ));
+        ]);
 
         $form->submit($submissionData);
         $this->assertFalse($form->isSynchronized());
@@ -1874,20 +1874,20 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function invalidNestedValueTestMatrix()
     {
-        return array(
-            'non-multiple, non-expanded' => array(false, false, array(array())),
-            'non-multiple, expanded' => array(false, true, array(array())),
-            'multiple, non-expanded' => array(true, false, array(array())),
-            'multiple, expanded' => array(true, true, array(array())),
-        );
+        return [
+            'non-multiple, non-expanded' => [false, false, [[]]],
+            'non-multiple, expanded' => [false, true, [[]]],
+            'multiple, non-expanded' => [true, false, [[]]],
+            'multiple, expanded' => [true, true, [[]]],
+        ];
     }
 
     public function testInheritTranslationDomainFromParent()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->add('child', static::TESTED_TYPE)
             ->getForm()
             ->createView();
@@ -1897,9 +1897,9 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassTranslationDomainToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'translation_domain' => 'domain',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('domain', $view->vars['translation_domain']);
@@ -1908,12 +1908,12 @@ class ChoiceTypeTest extends BaseTypeTest
     public function testPreferOwnTranslationDomain()
     {
         $view = $this->factory
-            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, array(
+            ->createNamedBuilder('parent', FormTypeTest::TESTED_TYPE, null, [
                 'translation_domain' => 'parent_domain',
-            ))
-            ->add('child', static::TESTED_TYPE, array(
+            ])
+            ->add('child', static::TESTED_TYPE, [
                 'translation_domain' => 'domain',
-            ))
+            ])
             ->getForm()
             ->createView();
 
@@ -1940,9 +1940,9 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassLabelToView()
     {
-        $view = $this->factory->createNamed('__test___field', static::TESTED_TYPE, null, array(
+        $view = $this->factory->createNamed('__test___field', static::TESTED_TYPE, null, [
             'label' => 'My label',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('My label', $view->vars['label']);
@@ -1974,9 +1974,9 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function testPassDisabledAsOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'disabled' => true,
-        ));
+        ]);
 
         $this->assertTrue($form->isDisabled());
     }
@@ -2006,13 +2006,13 @@ class ChoiceTypeTest extends BaseTypeTest
      */
     public function testTrimIsDisabled($multiple, $expanded)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => $multiple,
             'expanded' => $expanded,
-            'choices' => array(
+            'choices' => [
                 'a' => '1',
-            ),
-        ));
+            ],
+        ]);
 
         $submittedData = ' 1';
 
@@ -2030,13 +2030,13 @@ class ChoiceTypeTest extends BaseTypeTest
     {
         $valueWhitWhiteSpace = '1 ';
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => $multiple,
             'expanded' => $expanded,
-            'choices' => array(
+            'choices' => [
                 'a' => $valueWhitWhiteSpace,
-            ),
-        ));
+            ],
+        ]);
 
         $form->submit($multiple ? (array) $valueWhitWhiteSpace : $valueWhitWhiteSpace);
 
@@ -2046,11 +2046,11 @@ class ChoiceTypeTest extends BaseTypeTest
 
     public function provideTrimCases()
     {
-        return array(
-            'Simple' => array(false, false),
-            'Multiple' => array(true, false),
-            'Simple expanded' => array(false, true),
-            'Multiple expanded' => array(true, true),
-        );
+        return [
+            'Simple' => [false, false],
+            'Multiple' => [true, false],
+            'Simple expanded' => [false, true],
+            'Multiple expanded' => [true, true],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CountryTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CountryTypeTest.php
index 05ccd053fb..8c72b46bbc 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CountryTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CountryTypeTest.php
@@ -45,9 +45,9 @@ class CountryTypeTest extends BaseTypeTest
     public function testChoiceTranslationLocaleOption()
     {
         $choices = $this->factory
-            ->create(static::TESTED_TYPE, null, array(
+            ->create(static::TESTED_TYPE, null, [
                 'choice_translation_locale' => 'uk',
-            ))
+            ])
             ->createView()->vars['choices'];
 
         // Don't check objects for identity
@@ -63,7 +63,7 @@ class CountryTypeTest extends BaseTypeTest
         $choices = $this->factory->create(static::TESTED_TYPE, 'country')
             ->createView()->vars['choices'];
 
-        $countryCodes = array();
+        $countryCodes = [];
 
         foreach ($choices as $choice) {
             $countryCodes[] = $choice->value;
@@ -89,6 +89,6 @@ class CountryTypeTest extends BaseTypeTest
     {
         $type = new CountryType();
 
-        $this->assertSame(array(), $type->loadChoicesForValues(array('foo')));
+        $this->assertSame([], $type->loadChoicesForValues(['foo']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CurrencyTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CurrencyTypeTest.php
index a0f433677c..a02bae031a 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/CurrencyTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/CurrencyTypeTest.php
@@ -42,9 +42,9 @@ class CurrencyTypeTest extends BaseTypeTest
     public function testChoiceTranslationLocaleOption()
     {
         $choices = $this->factory
-            ->create(static::TESTED_TYPE, null, array(
+            ->create(static::TESTED_TYPE, null, [
                 'choice_translation_locale' => 'uk',
-            ))
+            ])
             ->createView()->vars['choices'];
 
         // Don't check objects for identity
@@ -70,6 +70,6 @@ class CurrencyTypeTest extends BaseTypeTest
     {
         $type = new CurrencyType();
 
-        $this->assertSame(array(), $type->loadChoicesForValues(array('foo')));
+        $this->assertSame([], $type->loadChoicesForValues(['foo']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateIntervalTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateIntervalTypeTest.php
index 9e7cecebff..6e19b9fc3d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateIntervalTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateIntervalTypeTest.php
@@ -21,39 +21,39 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitDateInterval()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('input' => 'dateinterval'));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['input' => 'dateinterval']);
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
-        ));
+        ]);
 
         $this->assertDateIntervalEquals(new \DateInterval('P7Y6M5D'), $form->getData());
     }
 
     public function testSubmitString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('input' => 'string'));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['input' => 'string']);
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
-        ));
+        ]);
 
         $this->assertSame('P7Y6M5D', $form->getData());
     }
 
     public function testSubmitArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('input' => 'array'));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['input' => 'array']);
 
-        $input = array(
+        $input = [
             'years' => '7',
             'months' => '6',
             'days' => '5',
-        );
+        ];
 
         $form->submit($input);
 
@@ -64,16 +64,16 @@ class DateIntervalTypeTest extends BaseTypeTest
     {
         $interval = new \DateInterval('P7Y5D');
 
-        $form = $this->factory->create(static::TESTED_TYPE, $interval, array(
+        $form = $this->factory->create(static::TESTED_TYPE, $interval, [
             'input' => 'dateinterval',
             'with_months' => false,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
-        ));
+        ]);
 
         $this->assertDateIntervalEquals($interval, $form->getData());
         $this->assertTrue($form->isSynchronized());
@@ -82,21 +82,21 @@ class DateIntervalTypeTest extends BaseTypeTest
     public function testSubmitWithTime()
     {
         $interval = new \DateInterval('P7Y6M5DT4H3M2S');
-        $form = $this->factory->create(static::TESTED_TYPE, $interval, array(
+        $form = $this->factory->create(static::TESTED_TYPE, $interval, [
             'input' => 'dateinterval',
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
             'hours' => '4',
             'minutes' => '3',
             'seconds' => '2',
-        ));
+        ]);
 
         $this->assertDateIntervalEquals($interval, $form->getData());
         $this->assertTrue($form->isSynchronized());
@@ -104,34 +104,34 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitWithWeeks()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, new \DateInterval('P0Y'), array(
+        $form = $this->factory->create(static::TESTED_TYPE, new \DateInterval('P0Y'), [
             'input' => 'dateinterval',
             'with_years' => false,
             'with_months' => false,
             'with_weeks' => true,
             'with_days' => false,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'weeks' => '30',
-        ));
+        ]);
 
         $this->assertDateIntervalEquals(new \DateInterval('P30W'), $form->getData());
     }
 
     public function testSubmitWithInvert()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'input' => 'dateinterval',
             'with_invert' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
             'invert' => true,
-        ));
+        ]);
 
         $interval = new \DateInterval('P7Y6M5D');
         $interval->invert = 1;
@@ -141,10 +141,10 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $interval = 'P7Y6M5D';
 
@@ -156,13 +156,13 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleTextWithSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'input' => 'string',
             'widget' => 'single_text',
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ));
+        ]);
 
         $interval = 'P7Y6M5DT4H3M2S';
 
@@ -174,19 +174,19 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitArrayInteger()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'integer',
             'with_invert' => true,
-        ));
+        ]);
 
         $years = '7';
 
-        $form->submit(array(
+        $form->submit([
             'years' => '7',
             'months' => '6',
             'days' => '5',
             'invert' => true,
-        ));
+        ]);
 
         $this->assertSame($years, $form['years']->getData());
         $this->assertSame($years, $form['years']->getViewData());
@@ -201,10 +201,10 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassDefaultPlaceholderToViewIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('', $view['years']->vars['placeholder']);
@@ -215,10 +215,10 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassNoPlaceholderToViewIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view['years']->vars['placeholder']);
@@ -229,10 +229,10 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsString()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'placeholder' => 'Empty',
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty', $view['years']->vars['placeholder']);
@@ -243,19 +243,19 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsArray()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'placeholder' => array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'placeholder' => [
                 'years' => 'Empty years',
                 'months' => 'Empty months',
                 'days' => 'Empty days',
                 'hours' => 'Empty hours',
                 'minutes' => 'Empty minutes',
                 'seconds' => 'Empty seconds',
-            ),
+            ],
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty years', $view['years']->vars['placeholder']);
@@ -268,18 +268,18 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddEmptyIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
-            'placeholder' => array(
+            'placeholder' => [
                 'years' => 'Empty years',
                 'days' => 'Empty days',
                 'hours' => 'Empty hours',
                 'seconds' => 'Empty seconds',
-            ),
+            ],
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty years', $view['years']->vars['placeholder']);
@@ -292,18 +292,18 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddNullIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
-            'placeholder' => array(
+            'placeholder' => [
                 'years' => 'Empty years',
                 'days' => 'Empty days',
                 'hours' => 'Empty hours',
                 'seconds' => 'Empty seconds',
-            ),
+            ],
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty years', $view['years']->vars['placeholder']);
@@ -321,18 +321,18 @@ class DateIntervalTypeTest extends BaseTypeTest
 
         $form['years']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['years']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['years']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testTranslationsAreDisabledForChoiceWidget()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_hours' => true,
             'with_minutes' => true,
             'with_seconds' => true,
-        ));
+        ]);
 
         $this->assertFalse($form->get('years')->getConfig()->getOption('choice_translation_domain'));
         $this->assertFalse($form->get('months')->getConfig()->getOption('choice_translation_domain'));
@@ -344,11 +344,11 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testInvertDoesNotInheritRequiredOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'input' => 'dateinterval',
             'with_invert' => true,
             'required' => true,
-        ));
+        ]);
 
         $this->assertFalse($form->get('invert')->getConfig()->getOption('required'));
     }
@@ -358,13 +358,13 @@ class DateIntervalTypeTest extends BaseTypeTest
         $form = $this->factory->create(
             static::TESTED_TYPE,
             null,
-            array(
+            [
                 'required' => true,
                 'with_invert' => true,
                 'with_hours' => true,
                 'with_minutes' => true,
                 'with_seconds' => true,
-                'labels' => array(
+                'labels' => [
                     'invert' => 'form.trans.invert',
                     'years' => 'form.trans.years',
                     'months' => 'form.trans.months',
@@ -372,8 +372,8 @@ class DateIntervalTypeTest extends BaseTypeTest
                     'hours' => 'form.trans.hours',
                     'minutes' => 'form.trans.minutes',
                     'seconds' => 'form.trans.seconds',
-                ),
-            )
+                ],
+            ]
         );
 
         $view = $form->createView();
@@ -388,15 +388,15 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testInvertDefaultLabel()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('with_invert' => true));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['with_invert' => true]);
 
         $view = $form->createView();
         $this->assertSame('Negative interval', $view['invert']->vars['label']);
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'with_invert' => true,
-            'labels' => array('invert' => null),
-        ));
+            'labels' => ['invert' => null],
+        ]);
 
         $view = $form->createView();
         $this->assertSame('Negative interval', $view['invert']->vars['label']);
@@ -404,22 +404,22 @@ class DateIntervalTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        parent::testSubmitNull($expected, $norm, array(
+        parent::testSubmitNull($expected, $norm, [
             'years' => '',
             'months' => '',
             'days' => '',
-        ));
+        ]);
     }
 
-    public function testSubmitNullUsesDefaultEmptyData($emptyData = array(), $expectedData = null)
+    public function testSubmitNullUsesDefaultEmptyData($emptyData = [], $expectedData = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // view transformer writes back empty strings in the view data
-        $this->assertSame(array('years' => '', 'months' => '', 'days' => ''), $form->getViewData());
+        $this->assertSame(['years' => '', 'months' => '', 'days' => ''], $form->getViewData());
         $this->assertSame($expectedData, $form->getNormData());
         $this->assertSame($expectedData, $form->getData());
     }
@@ -429,10 +429,10 @@ class DateIntervalTypeTest extends BaseTypeTest
      */
     public function testSubmitNullUsesDateEmptyData($widget, $emptyData, $expectedData)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -444,11 +444,11 @@ class DateIntervalTypeTest extends BaseTypeTest
     {
         $expectedData = \DateInterval::createFromDateString('6 years and 4 months');
 
-        return array(
-            'Simple field' => array('single_text', 'P6Y4M0D', $expectedData),
-            'Compound text field' => array('text', array('years' => '06', 'months' => '04', 'days' => '00'), $expectedData),
-            'Compound integer field' => array('integer', array('years' => '6', 'months' => '4', 'days' => '0'), $expectedData),
-            'Compound choice field' => array('choice', array('years' => '6', 'months' => '4', 'days' => '0'), $expectedData),
-        );
+        return [
+            'Simple field' => ['single_text', 'P6Y4M0D', $expectedData],
+            'Compound text field' => ['text', ['years' => '06', 'months' => '04', 'days' => '00'], $expectedData],
+            'Compound integer field' => ['integer', ['years' => '6', 'months' => '4', 'days' => '0'], $expectedData],
+            'Compound choice field' => ['choice', ['years' => '6', 'months' => '4', 'days' => '0'], $expectedData],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTimeTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTimeTypeTest.php
index 440fb822bd..4f4966c5f8 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTimeTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTimeTypeTest.php
@@ -26,26 +26,26 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDateTime()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
             'input' => 'datetime',
-        ));
+        ]);
 
-        $form->submit(array(
-            'date' => array(
+        $form->submit([
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
                 'minute' => '4',
-            ),
-        ));
+            ],
+        ]);
 
         $dateTime = new \DateTime('2010-06-02 03:04:00 UTC');
 
@@ -54,26 +54,26 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDateTimeImmutable()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
             'input' => 'datetime_immutable',
-        ));
+        ]);
 
-        $form->submit(array(
-            'date' => array(
+        $form->submit([
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
                 'minute' => '4',
-            ),
-        ));
+            ],
+        ]);
 
         $dateTime = new \DateTimeImmutable('2010-06-02 03:04:00 UTC');
 
@@ -82,52 +82,52 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
-            'date' => array(
+        $form->submit([
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
                 'minute' => '4',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertEquals('2010-06-02 03:04:00', $form->getData());
     }
 
     public function testSubmitTimestamp()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'timestamp',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
-            'date' => array(
+        $form->submit([
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
                 'minute' => '4',
-            ),
-        ));
+            ],
+        ]);
 
         $dateTime = new \DateTime('2010-06-02 03:04:00 UTC');
 
@@ -136,28 +136,28 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitWithoutMinutes()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
             'input' => 'datetime',
             'with_minutes' => false,
-        ));
+        ]);
 
         $form->setData(new \DateTime());
 
-        $input = array(
-            'date' => array(
+        $input = [
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
-            ),
-        );
+            ],
+        ];
 
         $form->submit($input);
 
@@ -166,30 +166,30 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitWithSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
             'input' => 'datetime',
             'with_seconds' => true,
-        ));
+        ]);
 
         $form->setData(new \DateTime());
 
-        $input = array(
-            'date' => array(
+        $input = [
+            'date' => [
                 'day' => '2',
                 'month' => '6',
                 'year' => '2010',
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => '3',
                 'minute' => '4',
                 'second' => '5',
-            ),
-        );
+            ],
+        ];
 
         $form->submit($input);
 
@@ -198,30 +198,30 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDifferentTimezones()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'America/New_York',
             'view_timezone' => 'Pacific/Tahiti',
             'date_widget' => 'choice',
-            'years' => array(2010),
+            'years' => [2010],
             'time_widget' => 'choice',
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
         $dateTime = new \DateTime('2010-06-02 03:04:05 Pacific/Tahiti');
 
-        $form->submit(array(
-            'date' => array(
+        $form->submit([
+            'date' => [
                 'day' => (int) $dateTime->format('d'),
                 'month' => (int) $dateTime->format('m'),
                 'year' => (int) $dateTime->format('Y'),
-            ),
-            'time' => array(
+            ],
+            'time' => [
                 'hour' => (int) $dateTime->format('H'),
                 'minute' => (int) $dateTime->format('i'),
                 'second' => (int) $dateTime->format('s'),
-            ),
-        ));
+            ],
+        ]);
 
         $dateTime->setTimezone(new \DateTimeZone('America/New_York'));
 
@@ -230,12 +230,12 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDifferentTimezonesDateTime()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'America/New_York',
             'view_timezone' => 'Pacific/Tahiti',
             'widget' => 'single_text',
             'input' => 'datetime',
-        ));
+        ]);
 
         $outputTime = new \DateTime('2010-06-02 03:04:00 Pacific/Tahiti');
 
@@ -249,12 +249,12 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDifferentTimezonesDateTimeImmutable()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'America/New_York',
             'view_timezone' => 'Pacific/Tahiti',
             'widget' => 'single_text',
             'input' => 'datetime_immutable',
-        ));
+        ]);
 
         $outputTime = new \DateTimeImmutable('2010-06-02 03:04:00 Pacific/Tahiti');
 
@@ -269,12 +269,12 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $form->submit('2010-06-02T03:04:00');
 
@@ -284,13 +284,13 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleTextWithSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'widget' => 'single_text',
             'with_seconds' => true,
-        ));
+        ]);
 
         $form->submit('2010-06-02T03:04:05');
 
@@ -300,19 +300,19 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitDifferentPattern()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'date_format' => 'MM*yyyy*dd',
             'date_widget' => 'single_text',
             'time_widget' => 'single_text',
             'input' => 'datetime',
-        ));
+        ]);
 
         $dateTime = new \DateTime('2010-06-02 03:04');
 
-        $form->submit(array(
+        $form->submit([
             'date' => '06*2010*02',
             'time' => '03:04',
-        ));
+        ]);
 
         $this->assertEquals($dateTime, $form->getData());
     }
@@ -326,9 +326,9 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSingleTextWidgetShouldUseTheRightInputType()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('datetime-local', $view->vars['type']);
@@ -336,10 +336,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassDefaultPlaceholderToViewIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('', $view['date']['year']->vars['placeholder']);
@@ -352,10 +352,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassNoPlaceholderToViewIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view['date']['year']->vars['placeholder']);
@@ -368,10 +368,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsString()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'placeholder' => 'Empty',
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty', $view['date']['year']->vars['placeholder']);
@@ -384,17 +384,17 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsArray()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'placeholder' => array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'placeholder' => [
                 'year' => 'Empty year',
                 'month' => 'Empty month',
                 'day' => 'Empty day',
                 'hour' => 'Empty hour',
                 'minute' => 'Empty minute',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['date']['year']->vars['placeholder']);
@@ -407,16 +407,16 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddEmptyIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
-            'placeholder' => array(
+            'placeholder' => [
                 'year' => 'Empty year',
                 'day' => 'Empty day',
                 'hour' => 'Empty hour',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['date']['year']->vars['placeholder']);
@@ -429,16 +429,16 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddNullIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
-            'placeholder' => array(
+            'placeholder' => [
                 'year' => 'Empty year',
                 'day' => 'Empty day',
                 'hour' => 'Empty hour',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['date']['year']->vars['placeholder']);
@@ -451,9 +451,9 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassHtml5TypeIfSingleTextAndHtml5Format()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('datetime-local', $view->vars['type']);
@@ -461,10 +461,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfHtml5NotAllowed()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'html5' => false,
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -472,10 +472,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfNotHtml5Format()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'format' => 'yyyy-MM-dd HH:mm',
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -483,9 +483,9 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfNotSingleText()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'text',
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -498,21 +498,21 @@ class DateTimeTypeTest extends BaseTypeTest
 
         $form['date']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['date']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['date']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testDateTypeSingleTextErrorsBubbleUp()
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'date_widget' => 'single_text',
-        ));
+        ]);
 
         $form['date']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['date']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['date']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testTimeTypeChoiceErrorsBubbleUp()
@@ -522,28 +522,28 @@ class DateTimeTypeTest extends BaseTypeTest
 
         $form['time']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['time']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['time']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testTimeTypeSingleTextErrorsBubbleUp()
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'time_widget' => 'single_text',
-        ));
+        ]);
 
         $form['time']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['time']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['time']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testPassDefaultChoiceTranslationDomain()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
 
@@ -557,10 +557,10 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'choice_translation_domain' => 'messages',
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('messages', $view['date']['year']->vars['choice_translation_domain']);
@@ -573,15 +573,15 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'choice_translation_domain' => array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'choice_translation_domain' => [
                 'year' => 'foo',
                 'month' => 'test',
                 'hour' => 'foo',
                 'second' => 'test',
-            ),
+            ],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('foo', $view['date']['year']->vars['choice_translation_domain']);
@@ -594,34 +594,34 @@ class DateTimeTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        parent::testSubmitNull($expected, $norm, array(
+        parent::testSubmitNull($expected, $norm, [
             // View data is an array of choice values array
-            'date' => array('year' => '', 'month' => '', 'day' => ''),
-            'time' => array('hour' => '', 'minute' => ''),
-        ));
+            'date' => ['year' => '', 'month' => '', 'day' => ''],
+            'time' => ['hour' => '', 'minute' => ''],
+        ]);
     }
 
     public function testSubmitNullWithText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'text',
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertNull($form->getData());
         $this->assertNull($form->getNormData());
-        $this->assertSame(array(
+        $this->assertSame([
             // View data is an array of choice values array
-            'date' => array('year' => '', 'month' => '', 'day' => ''),
-            'time' => array('hour' => '', 'minute' => ''),
-        ), $form->getViewData());
+            'date' => ['year' => '', 'month' => '', 'day' => ''],
+            'time' => ['hour' => '', 'minute' => ''],
+        ], $form->getViewData());
     }
 
     public function testSubmitNullWithSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertNull($form->getData());
@@ -629,16 +629,16 @@ class DateTimeTypeTest extends BaseTypeTest
         $this->assertSame('', $form->getViewData());
     }
 
-    public function testSubmitNullUsesDefaultEmptyData($emptyData = array(), $expectedData = null)
+    public function testSubmitNullUsesDefaultEmptyData($emptyData = [], $expectedData = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // view transformer writes back empty strings in the view data
         $this->assertSame(
-            array('date' => array('year' => '', 'month' => '', 'day' => ''), 'time' => array('hour' => '', 'minute' => '')),
+            ['date' => ['year' => '', 'month' => '', 'day' => ''], 'time' => ['hour' => '', 'minute' => '']],
             $form->getViewData()
         );
         $this->assertSame($expectedData, $form->getNormData());
@@ -650,10 +650,10 @@ class DateTimeTypeTest extends BaseTypeTest
      */
     public function testSubmitNullUsesDateEmptyData($widget, $emptyData, $expectedData)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -665,10 +665,10 @@ class DateTimeTypeTest extends BaseTypeTest
     {
         $expectedData = \DateTime::createFromFormat('Y-m-d H:i', '2018-11-11 21:23');
 
-        return array(
-            'Simple field' => array('single_text', '2018-11-11T21:23:00', $expectedData),
-            'Compound text field' => array('text', array('date' => array('year' => '2018', 'month' => '11', 'day' => '11'), 'time' => array('hour' => '21', 'minute' => '23')), $expectedData),
-            'Compound choice field' => array('choice', array('date' => array('year' => '2018', 'month' => '11', 'day' => '11'), 'time' => array('hour' => '21', 'minute' => '23')), $expectedData),
-        );
+        return [
+            'Simple field' => ['single_text', '2018-11-11T21:23:00', $expectedData],
+            'Compound text field' => ['text', ['date' => ['year' => '2018', 'month' => '11', 'day' => '11'], 'time' => ['hour' => '21', 'minute' => '23']], $expectedData],
+            'Compound choice field' => ['choice', ['date' => ['year' => '2018', 'month' => '11', 'day' => '11'], 'time' => ['hour' => '21', 'minute' => '23']], $expectedData],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
index a19ab5bffc..8a627c27e4 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
@@ -38,9 +38,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testInvalidWidgetOption()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'fake_widget',
-        ));
+        ]);
     }
 
     /**
@@ -48,19 +48,19 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testInvalidInputOption()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'input' => 'fake_input',
-        ));
+        ]);
     }
 
     public function testSubmitFromSingleTextDateTimeWithDefaultFormat()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'datetime',
-        ));
+        ]);
 
         $form->submit('2010-06-02');
 
@@ -70,13 +70,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromSingleTextDateTimeWithCustomFormat()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'datetime',
             'format' => 'yyyy',
-        ));
+        ]);
 
         $form->submit('2010');
 
@@ -91,13 +91,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'datetime',
-        ));
+        ]);
 
         $form->submit('2.6.2010');
 
@@ -112,13 +112,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'datetime_immutable',
-        ));
+        ]);
 
         $form->submit('2.6.2010');
 
@@ -134,13 +134,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'string',
-        ));
+        ]);
 
         $form->submit('2.6.2010');
 
@@ -155,13 +155,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'timestamp',
-        ));
+        ]);
 
         $form->submit('2.6.2010');
 
@@ -178,21 +178,21 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'single_text',
             'input' => 'array',
-        ));
+        ]);
 
         $form->submit('2.6.2010');
 
-        $output = array(
+        $output = [
             'day' => '2',
             'month' => '6',
             'year' => '2010',
-        );
+        ];
 
         $this->assertEquals($output, $form->getData());
         $this->assertEquals('02.06.2010', $form->getViewData());
@@ -200,17 +200,17 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'text',
-        ));
+        ]);
 
-        $text = array(
+        $text = [
             'day' => '2',
             'month' => '6',
             'year' => '2010',
-        );
+        ];
 
         $form->submit($text);
 
@@ -222,18 +222,18 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromChoice()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'choice',
-            'years' => array(2010),
-        ));
+            'years' => [2010],
+        ]);
 
-        $text = array(
+        $text = [
             'day' => '2',
             'month' => '6',
             'year' => '2010',
-        );
+        ];
 
         $form->submit($text);
 
@@ -245,18 +245,18 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromChoiceEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'choice',
             'required' => false,
-        ));
+        ]);
 
-        $text = array(
+        $text = [
             'day' => '',
             'month' => '',
             'year' => '',
-        );
+        ];
 
         $form->submit($text);
 
@@ -266,13 +266,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromInputDateTimeDifferentPattern()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'format' => 'MM*yyyy*dd',
             'widget' => 'single_text',
             'input' => 'datetime',
-        ));
+        ]);
 
         $form->submit('06*2010*02');
 
@@ -282,13 +282,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromInputStringDifferentPattern()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'format' => 'MM*yyyy*dd',
             'widget' => 'single_text',
             'input' => 'string',
-        ));
+        ]);
 
         $form->submit('06*2010*02');
 
@@ -298,13 +298,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromInputTimestampDifferentPattern()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'format' => 'MM*yyyy*dd',
             'widget' => 'single_text',
             'input' => 'timestamp',
-        ));
+        ]);
 
         $form->submit('06*2010*02');
 
@@ -316,21 +316,21 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitFromInputRawDifferentPattern()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'format' => 'MM*yyyy*dd',
             'widget' => 'single_text',
             'input' => 'array',
-        ));
+        ]);
 
         $form->submit('06*2010*02');
 
-        $output = array(
+        $output = [
             'day' => '2',
             'month' => '6',
             'year' => '2010',
-        );
+        ];
 
         $this->assertEquals($output, $form->getData());
         $this->assertEquals('06*2010*02', $form->getViewData());
@@ -341,9 +341,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testDatePatternWithFormatOption($format, $pattern)
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => $format,
-        ))
+        ])
             ->createView();
 
         $this->assertEquals($pattern, $view->vars['date_pattern']);
@@ -351,11 +351,11 @@ class DateTypeTest extends BaseTypeTest
 
     public function provideDateFormats()
     {
-        return array(
-            array('dMy', '{{ day }}{{ month }}{{ year }}'),
-            array('d-M-yyyy', '{{ day }}-{{ month }}-{{ year }}'),
-            array('M d y', '{{ month }} {{ day }} {{ year }}'),
-        );
+        return [
+            ['dMy', '{{ day }}{{ month }}{{ year }}'],
+            ['d-M-yyyy', '{{ day }}-{{ month }}-{{ year }}'],
+            ['M d y', '{{ month }} {{ day }} {{ year }}'],
+        ];
     }
 
     /**
@@ -366,11 +366,11 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfFormatIsNoPattern()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'format' => '0',
             'widget' => 'single_text',
             'input' => 'string',
-        ));
+        ]);
     }
 
     /**
@@ -379,10 +379,10 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfFormatDoesNotContainYearMonthAndDay()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
-            'months' => array(6, 7),
+        $this->factory->create(static::TESTED_TYPE, null, [
+            'months' => [6, 7],
             'format' => 'yy',
-        ));
+        ]);
     }
 
     /**
@@ -391,10 +391,10 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfFormatMissesYearMonthAndDayWithSingleTextWidget()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'format' => 'wrong',
-        ));
+        ]);
     }
 
     /**
@@ -402,9 +402,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfFormatIsNoConstant()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'format' => 105,
-        ));
+        ]);
     }
 
     /**
@@ -412,9 +412,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfFormatIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
-            'format' => array(),
-        ));
+        $this->factory->create(static::TESTED_TYPE, null, [
+            'format' => [],
+        ]);
     }
 
     /**
@@ -422,9 +422,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfYearsIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'years' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -432,9 +432,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfMonthsIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'months' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -442,9 +442,9 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfDaysIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'days' => 'bad value',
-        ));
+        ]);
     }
 
     public function testSetDataWithNegativeTimezoneOffsetStringInput()
@@ -454,13 +454,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'America/New_York',
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $form->setData('2010-06-02');
 
@@ -476,13 +476,13 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_DE');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::MEDIUM,
             'model_timezone' => 'UTC',
             'view_timezone' => 'America/New_York',
             'input' => 'datetime',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $dateTime = new \DateTime('2010-06-02 UTC');
 
@@ -496,31 +496,31 @@ class DateTypeTest extends BaseTypeTest
 
     public function testYearsOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'years' => array(2010, 2011),
-        ));
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'years' => [2010, 2011],
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView('2010', '2010', '2010'),
             new ChoiceView('2011', '2011', '2011'),
-        ), $view['year']->vars['choices']);
+        ], $view['year']->vars['choices']);
     }
 
     public function testMonthsOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'months' => array(6, 7),
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'months' => [6, 7],
             'format' => \IntlDateFormatter::SHORT,
-        ));
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView(6, '6', '06'),
             new ChoiceView(7, '7', '07'),
-        ), $view['month']->vars['choices']);
+        ], $view['month']->vars['choices']);
     }
 
     public function testMonthsOptionShortFormat()
@@ -530,17 +530,17 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_AT');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'months' => array(1, 4),
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'months' => [1, 4],
             'format' => 'dd.MMM.yy',
-        ));
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView(1, '1', 'Jän.'),
             new ChoiceView(4, '4', 'Apr.'),
-        ), $view['month']->vars['choices']);
+        ], $view['month']->vars['choices']);
     }
 
     public function testMonthsOptionLongFormat()
@@ -550,16 +550,16 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_AT');
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'months' => array(1, 4),
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'months' => [1, 4],
             'format' => 'dd.MMMM.yy',
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView(1, '1', 'Jänner'),
             new ChoiceView(4, '4', 'April'),
-        ), $view['month']->vars['choices']);
+        ], $view['month']->vars['choices']);
     }
 
     public function testMonthsOptionLongFormatWithDifferentTimezone()
@@ -569,78 +569,78 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_AT');
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'months' => array(1, 4),
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'months' => [1, 4],
             'format' => 'dd.MMMM.yy',
-        ))
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView(1, '1', 'Jänner'),
             new ChoiceView(4, '4', 'April'),
-        ), $view['month']->vars['choices']);
+        ], $view['month']->vars['choices']);
     }
 
     public function testIsDayWithinRangeReturnsTrueIfWithin()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'days' => array(6, 7),
-        ))
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'days' => [6, 7],
+        ])
             ->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView(6, '6', '06'),
             new ChoiceView(7, '7', '07'),
-        ), $view['day']->vars['choices']);
+        ], $view['day']->vars['choices']);
     }
 
     public function testIsSynchronizedReturnsTrueIfChoiceAndCompletelyEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'day' => '',
             'month' => '',
             'year' => '',
-        ));
+        ]);
 
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testIsSynchronizedReturnsTrueIfChoiceAndCompletelyFilled()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, new \DateTime(), array(
+        $form = $this->factory->create(static::TESTED_TYPE, new \DateTime(), [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'day' => '1',
             'month' => '6',
             'year' => '2010',
-        ));
+        ]);
 
         $this->assertTrue($form->isSynchronized());
     }
 
     public function testIsSynchronizedReturnsFalseIfChoiceAndDayEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'day' => '',
             'month' => '6',
             'year' => '2010',
-        ));
+        ]);
 
         $this->assertFalse($form->isSynchronized());
     }
@@ -665,9 +665,9 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('de_AT');
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => \IntlDateFormatter::LONG,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('{{ day }}{{ month }}{{ year }}', $view->vars['date_pattern']);
@@ -675,9 +675,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassDatePatternToViewDifferentPattern()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => 'MMyyyydd',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('{{ month }}{{ year }}{{ day }}', $view->vars['date_pattern']);
@@ -685,9 +685,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassDatePatternToViewDifferentPatternWithSeparators()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'format' => 'MM*yyyy*dd',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('{{ month }}*{{ year }}*{{ day }}', $view->vars['date_pattern']);
@@ -695,9 +695,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testDontPassDatePatternIfText()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('date_pattern', $view->vars);
@@ -710,10 +710,10 @@ class DateTypeTest extends BaseTypeTest
 
         \Locale::setDefault('es_ES');
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             // EEEE, d 'de' MMMM 'de' y
             'format' => \IntlDateFormatter::FULL,
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('{{ day }}{{ month }}{{ year }}', $view->vars['date_pattern']);
@@ -721,9 +721,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassWidgetToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('single_text', $view->vars['widget']);
@@ -738,9 +738,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSingleTextWidgetShouldUseTheRightInputType()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertEquals('date', $view->vars['type']);
@@ -748,9 +748,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassDefaultPlaceholderToViewIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
-        ))
+        ])
             ->createView();
 
         $this->assertSame('', $view['year']->vars['placeholder']);
@@ -760,9 +760,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassNoPlaceholderToViewIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
-        ))
+        ])
             ->createView();
 
         $this->assertNull($view['year']->vars['placeholder']);
@@ -772,9 +772,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsString()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'placeholder' => 'Empty',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('Empty', $view['year']->vars['placeholder']);
@@ -784,13 +784,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsArray()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
-            'placeholder' => array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
+            'placeholder' => [
                 'year' => 'Empty year',
                 'month' => 'Empty month',
                 'day' => 'Empty day',
-            ),
-        ))
+            ],
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['year']->vars['placeholder']);
@@ -800,13 +800,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddEmptyIfNotRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
-            'placeholder' => array(
+            'placeholder' => [
                 'year' => 'Empty year',
                 'day' => 'Empty day',
-            ),
-        ))
+            ],
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['year']->vars['placeholder']);
@@ -816,13 +816,13 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddNullIfRequired()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
-            'placeholder' => array(
+            'placeholder' => [
                 'year' => 'Empty year',
                 'day' => 'Empty day',
-            ),
-        ))
+            ],
+        ])
             ->createView();
 
         $this->assertSame('Empty year', $view['year']->vars['placeholder']);
@@ -832,9 +832,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassHtml5TypeIfSingleTextAndHtml5Format()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ))
+        ])
             ->createView();
 
         $this->assertSame('date', $view->vars['type']);
@@ -842,10 +842,10 @@ class DateTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfHtml5NotAllowed()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'html5' => false,
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -853,10 +853,10 @@ class DateTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfNotHtml5Format()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'format' => \IntlDateFormatter::MEDIUM,
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -864,9 +864,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfNotSingleText()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'text',
-        ))
+        ])
             ->createView();
 
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -874,10 +874,10 @@ class DateTypeTest extends BaseTypeTest
 
     public function provideCompoundWidgets()
     {
-        return array(
-            array('text'),
-            array('choice'),
-        );
+        return [
+            ['text'],
+            ['choice'],
+        ];
     }
 
     /**
@@ -886,13 +886,13 @@ class DateTypeTest extends BaseTypeTest
     public function testYearErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
-        ));
+        ]);
         $form['year']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['year']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['year']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     /**
@@ -901,13 +901,13 @@ class DateTypeTest extends BaseTypeTest
     public function testMonthErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
-        ));
+        ]);
         $form['month']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['month']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['month']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     /**
@@ -916,13 +916,13 @@ class DateTypeTest extends BaseTypeTest
     public function testDayErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
-        ));
+        ]);
         $form['day']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['day']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['day']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     public function testYearsFor32BitsMachines()
@@ -931,12 +931,12 @@ class DateTypeTest extends BaseTypeTest
             $this->markTestSkipped('PHP 32 bit is required.');
         }
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
             'years' => range(1900, 2040),
-        ))
+        ])
             ->createView();
 
-        $listChoices = array();
+        $listChoices = [];
         foreach (range(1902, 2037) as $y) {
             $listChoices[] = new ChoiceView($y, $y, $y);
         }
@@ -956,9 +956,9 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'choice_translation_domain' => 'messages',
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('messages', $view['year']->vars['choice_translation_domain']);
@@ -968,12 +968,12 @@ class DateTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'choice_translation_domain' => array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'choice_translation_domain' => [
                 'year' => 'foo',
                 'day' => 'test',
-            ),
-        ));
+            ],
+        ]);
 
         $view = $form->createView();
         $this->assertSame('foo', $view['year']->vars['choice_translation_domain']);
@@ -983,14 +983,14 @@ class DateTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        parent::testSubmitNull($expected, $norm, array('year' => '', 'month' => '', 'day' => ''));
+        parent::testSubmitNull($expected, $norm, ['year' => '', 'month' => '', 'day' => '']);
     }
 
     public function testSubmitNullWithSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertNull($form->getData());
@@ -998,15 +998,15 @@ class DateTypeTest extends BaseTypeTest
         $this->assertSame('', $form->getViewData());
     }
 
-    public function testSubmitNullUsesDefaultEmptyData($emptyData = array(), $expectedData = null)
+    public function testSubmitNullUsesDefaultEmptyData($emptyData = [], $expectedData = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // view transformer writes back empty strings in the view data
-        $this->assertSame(array('year' => '', 'month' => '', 'day' => ''), $form->getViewData());
+        $this->assertSame(['year' => '', 'month' => '', 'day' => ''], $form->getViewData());
         $this->assertSame($expectedData, $form->getNormData());
         $this->assertSame($expectedData, $form->getData());
     }
@@ -1016,10 +1016,10 @@ class DateTypeTest extends BaseTypeTest
      */
     public function testSubmitNullUsesDateEmptyData($widget, $emptyData, $expectedData)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -1031,10 +1031,10 @@ class DateTypeTest extends BaseTypeTest
     {
         $expectedData = \DateTime::createFromFormat('Y-m-d H:i:s', '2018-11-11 00:00:00');
 
-        return array(
-            'Simple field' => array('single_text', '2018-11-11', $expectedData),
-            'Compound text fields' => array('text', array('year' => '2018', 'month' => '11', 'day' => '11'), $expectedData),
-            'Compound choice fields' => array('choice', array('year' => '2018', 'month' => '11', 'day' => '11'), $expectedData),
-        );
+        return [
+            'Simple field' => ['single_text', '2018-11-11', $expectedData],
+            'Compound text fields' => ['text', ['year' => '2018', 'month' => '11', 'day' => '11'], $expectedData],
+            'Compound choice fields' => ['choice', ['year' => '2018', 'month' => '11', 'day' => '11'], $expectedData],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ExtendedChoiceTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ExtendedChoiceTypeTest.php
index 7d33e7e390..4d88390875 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ExtendedChoiceTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ExtendedChoiceTypeTest.php
@@ -29,7 +29,7 @@ class ExtendedChoiceTypeTest extends TestCase
             ->getFormFactory()
         ;
 
-        $choices = $factory->create($type, null, array('choice_loader' => null))->createView()->vars['choices'];
+        $choices = $factory->create($type, null, ['choice_loader' => null])->createView()->vars['choices'];
 
         $this->assertCount(2, $choices);
         $this->assertSame('A', $choices[0]->label);
@@ -60,10 +60,10 @@ class ExtendedChoiceTypeTest extends TestCase
 
     public function provideTestedTypes()
     {
-        yield array(CountryTypeTest::TESTED_TYPE);
-        yield array(CurrencyTypeTest::TESTED_TYPE);
-        yield array(LanguageTypeTest::TESTED_TYPE);
-        yield array(LocaleTypeTest::TESTED_TYPE);
-        yield array(TimezoneTypeTest::TESTED_TYPE);
+        yield [CountryTypeTest::TESTED_TYPE];
+        yield [CurrencyTypeTest::TESTED_TYPE];
+        yield [LanguageTypeTest::TESTED_TYPE];
+        yield [LocaleTypeTest::TESTED_TYPE];
+        yield [TimezoneTypeTest::TESTED_TYPE];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
index a7edef0144..14340989ce 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
@@ -25,7 +25,7 @@ class FileTypeTest extends BaseTypeTest
     {
         $form = $this->factory->createBuilder(static::TESTED_TYPE)->getForm();
         $data = $this->getMockBuilder('Symfony\Component\HttpFoundation\File\File')
-            ->setConstructorArgs(array(__DIR__.'/../../../Fixtures/foo', 'foo'))
+            ->setConstructorArgs([__DIR__.'/../../../Fixtures/foo', 'foo'])
             ->getMock();
 
         $form->setData($data);
@@ -52,14 +52,14 @@ class FileTypeTest extends BaseTypeTest
      */
     public function testSetDataMultiple(RequestHandlerInterface $requestHandler)
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'multiple' => true,
-        ))->setRequestHandler($requestHandler)->getForm();
+        ])->setRequestHandler($requestHandler)->getForm();
 
-        $data = array(
+        $data = [
             $this->createUploadedFileMock($requestHandler, __DIR__.'/../../../Fixtures/foo', 'foo.jpg'),
             $this->createUploadedFileMock($requestHandler, __DIR__.'/../../../Fixtures/foo2', 'foo2.jpg'),
-        );
+        ];
 
         $form->setData($data);
         $this->assertSame($data, $form->getData());
@@ -70,14 +70,14 @@ class FileTypeTest extends BaseTypeTest
      */
     public function testSubmitMultiple(RequestHandlerInterface $requestHandler)
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'multiple' => true,
-        ))->setRequestHandler($requestHandler)->getForm();
+        ])->setRequestHandler($requestHandler)->getForm();
 
-        $data = array(
+        $data = [
             $this->createUploadedFileMock($requestHandler, __DIR__.'/../../../Fixtures/foo', 'foo.jpg'),
             $this->createUploadedFileMock($requestHandler, __DIR__.'/../../../Fixtures/foo2', 'foo2.jpg'),
-        );
+        ];
 
         $form->submit($data);
         $this->assertSame($data, $form->getData());
@@ -93,9 +93,9 @@ class FileTypeTest extends BaseTypeTest
     public function testDontPassValueToView(RequestHandlerInterface $requestHandler)
     {
         $form = $this->factory->createBuilder(static::TESTED_TYPE)->setRequestHandler($requestHandler)->getForm();
-        $form->submit(array(
+        $form->submit([
             'file' => $this->createUploadedFileMock($requestHandler, __DIR__.'/../../../Fixtures/foo', 'foo.jpg'),
-        ));
+        ]);
 
         $this->assertEquals('', $form->createView()->vars['value']);
     }
@@ -115,15 +115,15 @@ class FileTypeTest extends BaseTypeTest
 
     public function testSubmitNullWhenMultiple()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'multiple' => true,
-        ));
+        ]);
         // submitted data when an input file is uploaded without choosing any file
-        $form->submit(array(null));
+        $form->submit([null]);
 
-        $this->assertSame(array(), $form->getData());
-        $this->assertSame(array(), $form->getNormData());
-        $this->assertSame(array(), $form->getViewData());
+        $this->assertSame([], $form->getData());
+        $this->assertSame([], $form->getNormData());
+        $this->assertSame([], $form->getViewData());
     }
 
     /**
@@ -145,16 +145,16 @@ class FileTypeTest extends BaseTypeTest
     public function testMultipleSubmittedFilePathsAreDropped(RequestHandlerInterface $requestHandler)
     {
         $form = $this->factory
-            ->createBuilder(static::TESTED_TYPE, null, array(
+            ->createBuilder(static::TESTED_TYPE, null, [
                 'multiple' => true,
-            ))
+            ])
             ->setRequestHandler($requestHandler)
             ->getForm();
-        $form->submit(array(
+        $form->submit([
             'file:///etc/passwd',
             $this->createUploadedFileMock(new HttpFoundationRequestHandler(), __DIR__.'/../../../Fixtures/foo', 'foo.jpg'),
             $this->createUploadedFileMock(new NativeRequestHandler(), __DIR__.'/../../../Fixtures/foo2', 'foo2.jpg'),
-        ));
+        ]);
 
         $this->assertCount(1, $form->getData());
     }
@@ -165,24 +165,24 @@ class FileTypeTest extends BaseTypeTest
     public function testSubmitNonArrayValueWhenMultiple(RequestHandlerInterface $requestHandler)
     {
         $form = $this->factory
-            ->createBuilder(static::TESTED_TYPE, null, array(
+            ->createBuilder(static::TESTED_TYPE, null, [
                 'multiple' => true,
-            ))
+            ])
             ->setRequestHandler($requestHandler)
             ->getForm();
         $form->submit(null);
 
-        $this->assertSame(array(), $form->getData());
-        $this->assertSame(array(), $form->getNormData());
-        $this->assertSame(array(), $form->getViewData());
+        $this->assertSame([], $form->getData());
+        $this->assertSame([], $form->getNormData());
+        $this->assertSame([], $form->getViewData());
     }
 
     public function requestHandlerProvider()
     {
-        return array(
-            array(new HttpFoundationRequestHandler()),
-            array(new NativeRequestHandler()),
-        );
+        return [
+            [new HttpFoundationRequestHandler()],
+            [new NativeRequestHandler()],
+        ];
     }
 
     private function createUploadedFileMock(RequestHandlerInterface $requestHandler, $path, $originalName)
@@ -191,12 +191,12 @@ class FileTypeTest extends BaseTypeTest
             return new UploadedFile($path, $originalName, null, null, true);
         }
 
-        return array(
+        return [
             'name' => $originalName,
             'error' => 0,
             'type' => 'text/plain',
             'tmp_name' => $path,
             'size' => null,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
index 2f08dd6ad4..5e0bb9e90f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FormTypeTest.php
@@ -60,11 +60,11 @@ class FormTypeTest extends BaseTypeTest
 
     public function testPassRequiredAsOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('required' => false));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['required' => false]);
 
         $this->assertFalse($form->isRequired());
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('required' => true));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['required' => true]);
 
         $this->assertTrue($form->isRequired());
     }
@@ -72,10 +72,10 @@ class FormTypeTest extends BaseTypeTest
     public function testSubmittedDataIsTrimmedBeforeTransforming()
     {
         $form = $this->factory->createBuilder(static::TESTED_TYPE)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'reverse[a]' => 'a',
-            )))
+            ]))
             ->setCompound(false)
             ->getForm();
 
@@ -87,11 +87,11 @@ class FormTypeTest extends BaseTypeTest
 
     public function testSubmittedDataIsNotTrimmedBeforeTransformingIfNoTrimming()
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array('trim' => false))
-            ->addViewTransformer(new FixedDataTransformer(array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, ['trim' => false])
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'reverse[ a ]' => ' a ',
-            )))
+            ]))
             ->setCompound(false)
             ->getForm();
 
@@ -103,7 +103,7 @@ class FormTypeTest extends BaseTypeTest
 
     public function testNonReadOnlyFormWithReadOnlyParentIsReadOnly()
     {
-        $view = $this->factory->createNamedBuilder('parent', static::TESTED_TYPE, null, array('attr' => array('readonly' => true)))
+        $view = $this->factory->createNamedBuilder('parent', static::TESTED_TYPE, null, ['attr' => ['readonly' => true]])
             ->add('child', static::TESTED_TYPE)
             ->getForm()
             ->createView();
@@ -114,7 +114,7 @@ class FormTypeTest extends BaseTypeTest
     public function testReadOnlyFormWithNonReadOnlyParentIsReadOnly()
     {
         $view = $this->factory->createNamedBuilder('parent', static::TESTED_TYPE)
-            ->add('child', static::TESTED_TYPE, array('attr' => array('readonly' => true)))
+            ->add('child', static::TESTED_TYPE, ['attr' => ['readonly' => true]])
             ->getForm()
             ->createView();
 
@@ -133,7 +133,7 @@ class FormTypeTest extends BaseTypeTest
 
     public function testPassMaxLengthToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array('attr' => array('maxlength' => 10)))
+        $view = $this->factory->create(static::TESTED_TYPE, null, ['attr' => ['maxlength' => 10]])
             ->createView();
 
         $this->assertSame(10, $view->vars['attr']['maxlength']);
@@ -141,23 +141,23 @@ class FormTypeTest extends BaseTypeTest
 
     public function testDataClassMayBeNull()
     {
-        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => null,
-        )));
+        ]));
     }
 
     public function testDataClassMayBeAbstractClass()
     {
-        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\AbstractAuthor',
-        )));
+        ]));
     }
 
     public function testDataClassMayBeInterface()
     {
-        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $this->assertInstanceOf('Symfony\Component\Form\FormBuilderInterface', $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\AuthorInterface',
-        )));
+        ]));
     }
 
     /**
@@ -165,22 +165,22 @@ class FormTypeTest extends BaseTypeTest
      */
     public function testDataClassMustBeValidClassOrInterface()
     {
-        $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'foobar',
-        ));
+        ]);
     }
 
-    public function testSubmitNullUsesDefaultEmptyData($emptyData = array(), $expectedData = array())
+    public function testSubmitNullUsesDefaultEmptyData($emptyData = [], $expectedData = [])
     {
         parent::testSubmitNullUsesDefaultEmptyData($emptyData, $expectedData);
     }
 
     public function testSubmitWithEmptyDataCreatesObjectIfClassAvailable()
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
             'required' => false,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->add('lastName', TextTypeTest::TESTED_TYPE)
             ->getForm();
@@ -188,7 +188,7 @@ class FormTypeTest extends BaseTypeTest
         $this->assertNull($form->getData());
 
         // partially empty, still an object is created
-        $form->submit(array('firstName' => 'Bernhard', 'lastName' => ''));
+        $form->submit(['firstName' => 'Bernhard', 'lastName' => '']);
 
         $author = new Author();
         $author->firstName = 'Bernhard';
@@ -200,17 +200,17 @@ class FormTypeTest extends BaseTypeTest
     public function testSubmitWithDefaultDataDontCreateObject()
     {
         $defaultAuthor = new Author();
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             // data class is inferred from the passed object
             'data' => $defaultAuthor,
             'required' => false,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->add('lastName', TextTypeTest::TESTED_TYPE)
             ->getForm();
 
         // partially empty
-        $form->submit(array('firstName' => 'Bernhard', 'lastName' => ''));
+        $form->submit(['firstName' => 'Bernhard', 'lastName' => '']);
 
         $author = new Author();
         $author->firstName = 'Bernhard';
@@ -222,50 +222,50 @@ class FormTypeTest extends BaseTypeTest
 
     public function testSubmitWithEmptyDataCreatesArrayIfDataClassIsNull()
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => null,
             'required' => false,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->getForm();
 
         $this->assertNull($form->getData());
 
-        $form->submit(array('firstName' => 'Bernhard'));
+        $form->submit(['firstName' => 'Bernhard']);
 
-        $this->assertSame(array('firstName' => 'Bernhard'), $form->getData());
+        $this->assertSame(['firstName' => 'Bernhard'], $form->getData());
     }
 
     public function testSubmitEmptyWithEmptyDataDontCreateObjectIfNotRequired()
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
             'required' => false,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->add('lastName', TextTypeTest::TESTED_TYPE)
             ->getForm();
 
         $this->assertNull($form->getData());
 
-        $form->submit(array('firstName' => '', 'lastName' => ''));
+        $form->submit(['firstName' => '', 'lastName' => '']);
 
         $this->assertNull($form->getData());
     }
 
     public function testSubmitEmptyWithEmptyDataCreatesObjectIfRequired()
     {
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
             'required' => true,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->add('lastName', TextTypeTest::TESTED_TYPE)
             ->getForm();
 
         $this->assertNull($form->getData());
 
-        $form->submit(array('firstName' => '', 'lastName' => ''));
+        $form->submit(['firstName' => '', 'lastName' => '']);
 
         $this->assertEquals(new Author(), $form->getData());
     }
@@ -281,20 +281,20 @@ class FormTypeTest extends BaseTypeTest
 
         $this->assertNull($form->getData());
 
-        $form->submit(array('firstName' => 'Bernhard'));
+        $form->submit(['firstName' => 'Bernhard']);
 
-        $this->assertSame(array('firstName' => 'Bernhard'), $form->getData());
+        $this->assertSame(['firstName' => 'Bernhard'], $form->getData());
     }
 
     public function testSubmitWithEmptyDataPassesEmptyStringToTransformerIfNotCompound()
     {
         $form = $this->factory->createBuilder(static::TESTED_TYPE)
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 // required for the initial, internal setData(null)
                 '' => 'null',
                 // required to test that submit(null) is converted to ''
                 'empty' => '',
-            )))
+            ]))
             ->setCompound(false)
             ->getForm();
 
@@ -313,17 +313,17 @@ class FormTypeTest extends BaseTypeTest
     {
         $author = new Author();
 
-        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, array(
+        $form = $this->factory->createBuilder(static::TESTED_TYPE, null, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
             'empty_data' => $author,
-        ))
+        ])
             ->add('firstName', TextTypeTest::TESTED_TYPE)
             ->getForm();
 
         $this->assertNull($form->getData());
         $this->assertNull($form->getViewData());
 
-        $form->submit(array('firstName' => 'Bernhard'));
+        $form->submit(['firstName' => 'Bernhard']);
 
         $this->assertSame($author, $form->getData());
         $this->assertEquals('Bernhard', $author->firstName);
@@ -334,7 +334,7 @@ class FormTypeTest extends BaseTypeTest
      */
     public function testAttributesException()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array('attr' => ''));
+        $this->factory->create(static::TESTED_TYPE, null, ['attr' => '']);
     }
 
     public function testNameCanBeEmptyString()
@@ -349,18 +349,18 @@ class FormTypeTest extends BaseTypeTest
         $author = new FormTest_AuthorWithoutRefSetter(new Author());
 
         $builder = $this->factory->createBuilder(static::TESTED_TYPE, $author);
-        $builder->add('reference', static::TESTED_TYPE, array(
+        $builder->add('reference', static::TESTED_TYPE, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
-        ));
+        ]);
         $builder->get('reference')->add('firstName', TextTypeTest::TESTED_TYPE);
         $form = $builder->getForm();
 
-        $form->submit(array(
+        $form->submit([
             // reference has a getter, but no setter
-            'reference' => array(
+            'reference' => [
                 'firstName' => 'Foo',
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertEquals('Foo', $author->getReference()->firstName);
     }
@@ -372,20 +372,20 @@ class FormTypeTest extends BaseTypeTest
         $newReference = new Author();
 
         $builder = $this->factory->createBuilder(static::TESTED_TYPE, $author);
-        $builder->add('referenceCopy', static::TESTED_TYPE, array(
+        $builder->add('referenceCopy', static::TESTED_TYPE, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
-        ));
+        ]);
         $builder->get('referenceCopy')->add('firstName', TextTypeTest::TESTED_TYPE);
         $form = $builder->getForm();
 
         $form['referenceCopy']->setData($newReference); // new author object
 
-        $form->submit(array(
+        $form->submit([
             // referenceCopy has a getter that returns a copy
-            'referenceCopy' => array(
+            'referenceCopy' => [
                 'firstName' => 'Foo',
-        ),
-        ));
+        ],
+        ]);
 
         $this->assertEquals('Foo', $author->getReferenceCopy()->firstName);
     }
@@ -395,19 +395,19 @@ class FormTypeTest extends BaseTypeTest
         $author = new FormTest_AuthorWithoutRefSetter(new Author());
 
         $builder = $this->factory->createBuilder(static::TESTED_TYPE, $author);
-        $builder->add('referenceCopy', static::TESTED_TYPE, array(
+        $builder->add('referenceCopy', static::TESTED_TYPE, [
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
             'by_reference' => false,
-        ));
+        ]);
         $builder->get('referenceCopy')->add('firstName', TextTypeTest::TESTED_TYPE);
         $form = $builder->getForm();
 
-        $form->submit(array(
+        $form->submit([
             // referenceCopy has a getter that returns a copy
-            'referenceCopy' => array(
+            'referenceCopy' => [
                 'firstName' => 'Foo',
-            ),
-        ));
+            ],
+        ]);
 
         // firstName can only be updated if setReferenceCopy() was called
         $this->assertEquals('Foo', $author->getReferenceCopy()->firstName);
@@ -427,9 +427,9 @@ class FormTypeTest extends BaseTypeTest
         ));
         $form = $builder->getForm();
 
-        $form->submit(array(
-            'referenceCopy' => array(), // doesn't matter actually
-        ));
+        $form->submit([
+            'referenceCopy' => [], // doesn't matter actually
+        ]);
 
         // firstName can only be updated if setReferenceCopy() was called
         $this->assertEquals('foobar', $author->getReferenceCopy());
@@ -439,7 +439,7 @@ class FormTypeTest extends BaseTypeTest
     {
         $ref1 = new Author();
         $ref2 = new Author();
-        $author = array('referenceCopy' => $ref1);
+        $author = ['referenceCopy' => $ref1];
 
         $builder = $this->factory->createBuilder(static::TESTED_TYPE);
         $builder->setData($author);
@@ -452,9 +452,9 @@ class FormTypeTest extends BaseTypeTest
         ));
         $form = $builder->getForm();
 
-        $form->submit(array(
-            'referenceCopy' => array(), // doesn't matter actually
-        ));
+        $form->submit([
+            'referenceCopy' => [], // doesn't matter actually
+        ]);
 
         // the new reference was inserted into the array
         $author = $form->getData();
@@ -491,28 +491,28 @@ class FormTypeTest extends BaseTypeTest
 
     public function testNoErrorBubblingIfNotCompound()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'compound' => false,
-        ));
+        ]);
 
         $this->assertFalse($form->getConfig()->getErrorBubbling());
     }
 
     public function testOverrideErrorBubbling()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'compound' => false,
             'error_bubbling' => true,
-        ));
+        ]);
 
         $this->assertTrue($form->getConfig()->getErrorBubbling());
     }
 
     public function testPropertyPath()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'property_path' => 'foo',
-        ));
+        ]);
 
         $this->assertEquals(new PropertyPath('foo'), $form->getPropertyPath());
         $this->assertTrue($form->getConfig()->getMapped());
@@ -520,9 +520,9 @@ class FormTypeTest extends BaseTypeTest
 
     public function testPropertyPathNullImpliesDefault()
     {
-        $form = $this->factory->createNamed('name', static::TESTED_TYPE, null, array(
+        $form = $this->factory->createNamed('name', static::TESTED_TYPE, null, [
             'property_path' => null,
-        ));
+        ]);
 
         $this->assertEquals(new PropertyPath('name'), $form->getPropertyPath());
         $this->assertTrue($form->getConfig()->getMapped());
@@ -530,10 +530,10 @@ class FormTypeTest extends BaseTypeTest
 
     public function testNotMapped()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'property_path' => 'foo',
             'mapped' => false,
-        ));
+        ]);
 
         $this->assertEquals(new PropertyPath('foo'), $form->getPropertyPath());
         $this->assertFalse($form->getConfig()->getMapped());
@@ -550,7 +550,7 @@ class FormTypeTest extends BaseTypeTest
     public function testViewNotValidSubmitted()
     {
         $form = $this->factory->create(static::TESTED_TYPE);
-        $form->submit(array());
+        $form->submit([]);
         $form->addError(new FormError('An error'));
 
         $this->assertFalse($form->createView()->vars['valid']);
@@ -567,17 +567,17 @@ class FormTypeTest extends BaseTypeTest
     public function testViewSubmittedSubmitted()
     {
         $form = $this->factory->create(static::TESTED_TYPE);
-        $form->submit(array());
+        $form->submit([]);
 
         $this->assertTrue($form->createView()->vars['submitted']);
     }
 
     public function testDataOptionSupersedesSetDataCalls()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'data' => 'default',
             'compound' => false,
-        ));
+        ]);
 
         $form->setData('foobar');
 
@@ -586,9 +586,9 @@ class FormTypeTest extends BaseTypeTest
 
     public function testPassedDataSupersedesSetDataCalls()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, 'default', array(
+        $form = $this->factory->create(static::TESTED_TYPE, 'default', [
             'compound' => false,
-        ));
+        ]);
 
         $form->setData('foobar');
 
@@ -597,10 +597,10 @@ class FormTypeTest extends BaseTypeTest
 
     public function testDataOptionSupersedesSetDataCallsIfNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'data' => null,
             'compound' => false,
-        ));
+        ]);
 
         $form->setData('foobar');
 
@@ -610,12 +610,12 @@ class FormTypeTest extends BaseTypeTest
     public function testNormDataIsPassedToView()
     {
         $view = $this->factory->createBuilder(static::TESTED_TYPE)
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 'foo' => 'bar',
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 'bar' => 'baz',
-            )))
+            ]))
             ->setData('foo')
             ->getForm()
             ->createView();
@@ -627,9 +627,9 @@ class FormTypeTest extends BaseTypeTest
     // https://github.com/symfony/symfony/issues/6862
     public function testPassZeroLabelToView()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array(
+        $view = $this->factory->create(static::TESTED_TYPE, null, [
                 'label' => '0',
-            ))
+            ])
             ->createView();
 
         $this->assertSame('0', $view->vars['label']);
@@ -637,7 +637,7 @@ class FormTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        parent::testSubmitNull(array(), array(), array());
+        parent::testSubmitNull([], [], []);
     }
 
     public function testPassBlockPrefixToViewWithParent()
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/IntegerTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/IntegerTypeTest.php
index fd3c2faf6a..273402aefe 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/IntegerTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/IntegerTypeTest.php
@@ -41,9 +41,9 @@ class IntegerTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = '10', $expectedData = 10)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/LanguageTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/LanguageTypeTest.php
index 76e6685d5d..7d748fa650 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/LanguageTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/LanguageTypeTest.php
@@ -44,9 +44,9 @@ class LanguageTypeTest extends BaseTypeTest
     public function testChoiceTranslationLocaleOption()
     {
         $choices = $this->factory
-            ->create(static::TESTED_TYPE, null, array(
+            ->create(static::TESTED_TYPE, null, [
                 'choice_translation_locale' => 'uk',
-            ))
+            ])
             ->createView()->vars['choices'];
 
         // Don't check objects for identity
@@ -82,6 +82,6 @@ class LanguageTypeTest extends BaseTypeTest
     {
         $type = new LanguageType();
 
-        $this->assertSame(array(), $type->loadChoicesForValues(array('foo')));
+        $this->assertSame([], $type->loadChoicesForValues(['foo']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/LocaleTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/LocaleTypeTest.php
index 94e22928ff..63ae7aa068 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/LocaleTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/LocaleTypeTest.php
@@ -42,9 +42,9 @@ class LocaleTypeTest extends BaseTypeTest
     public function testChoiceTranslationLocaleOption()
     {
         $choices = $this->factory
-            ->create(static::TESTED_TYPE, null, array(
+            ->create(static::TESTED_TYPE, null, [
                 'choice_translation_locale' => 'uk',
-            ))
+            ])
             ->createView()->vars['choices'];
 
         // Don't check objects for identity
@@ -70,6 +70,6 @@ class LocaleTypeTest extends BaseTypeTest
     {
         $type = new LocaleType();
 
-        $this->assertSame(array(), $type->loadChoicesForValues(array('foo')));
+        $this->assertSame([], $type->loadChoicesForValues(['foo']));
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/MoneyTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/MoneyTypeTest.php
index a430773152..507a6ffe37 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/MoneyTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/MoneyTypeTest.php
@@ -40,7 +40,7 @@ class MoneyTypeTest extends BaseTypeTest
     {
         \Locale::setDefault('en_US');
 
-        $view = $this->factory->create(static::TESTED_TYPE, null, array('currency' => 'JPY'))
+        $view = $this->factory->create(static::TESTED_TYPE, null, ['currency' => 'JPY'])
             ->createView();
 
         $this->assertSame('¥ {{ widget }}', $view->vars['money_pattern']);
@@ -51,8 +51,8 @@ class MoneyTypeTest extends BaseTypeTest
     {
         \Locale::setDefault('de_DE');
 
-        $view1 = $this->factory->create(static::TESTED_TYPE, null, array('currency' => 'GBP'))->createView();
-        $view2 = $this->factory->create(static::TESTED_TYPE, null, array('currency' => 'EUR'))->createView();
+        $view1 = $this->factory->create(static::TESTED_TYPE, null, ['currency' => 'GBP'])->createView();
+        $view2 = $this->factory->create(static::TESTED_TYPE, null, ['currency' => 'EUR'])->createView();
 
         $this->assertSame('{{ widget }} £', $view1->vars['money_pattern']);
         $this->assertSame('{{ widget }} €', $view2->vars['money_pattern']);
@@ -65,7 +65,7 @@ class MoneyTypeTest extends BaseTypeTest
 
     public function testMoneyPatternWithoutCurrency()
     {
-        $view = $this->factory->create(static::TESTED_TYPE, null, array('currency' => false))
+        $view = $this->factory->create(static::TESTED_TYPE, null, ['currency' => false])
             ->createView();
 
         $this->assertSame('{{ widget }}', $view->vars['money_pattern']);
@@ -73,9 +73,9 @@ class MoneyTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = '10.00', $expectedData = 10.0)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -85,7 +85,7 @@ class MoneyTypeTest extends BaseTypeTest
 
     public function testDefaultFormattingWithDefaultRounding()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('scale' => 0));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['scale' => 0]);
         $form->setData('12345.54321');
 
         $this->assertSame('12346', $form->createView()->vars['value']);
@@ -93,7 +93,7 @@ class MoneyTypeTest extends BaseTypeTest
 
     public function testDefaultFormattingWithSpecifiedRounding()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('scale' => 0, 'rounding_mode' => \NumberFormatter::ROUND_DOWN));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['scale' => 0, 'rounding_mode' => \NumberFormatter::ROUND_DOWN]);
         $form->setData('12345.54321');
 
         $this->assertSame('12345', $form->createView()->vars['value']);
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
index a15d6f6642..c19c82b117 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/NumberTypeTest.php
@@ -37,7 +37,7 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testDefaultFormattingWithGrouping()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('grouping' => true));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['grouping' => true]);
         $form->setData('12345.67890');
 
         $this->assertSame('12.345,679', $form->createView()->vars['value']);
@@ -45,7 +45,7 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testDefaultFormattingWithScale()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('scale' => 2));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['scale' => 2]);
         $form->setData('12345.67890');
 
         $this->assertSame('12345,68', $form->createView()->vars['value']);
@@ -53,7 +53,7 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testDefaultFormattingWithRounding()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('scale' => 0, 'rounding_mode' => \NumberFormatter::ROUND_UP));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['scale' => 0, 'rounding_mode' => \NumberFormatter::ROUND_UP]);
         $form->setData('12345.54321');
 
         $this->assertSame('12346', $form->createView()->vars['value']);
@@ -66,9 +66,9 @@ class NumberTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = '10', $expectedData = 10.0)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/PasswordTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/PasswordTypeTest.php
index c48240c651..872311b91d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/PasswordTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/PasswordTypeTest.php
@@ -33,7 +33,7 @@ class PasswordTypeTest extends BaseTypeTest
 
     public function testNotEmptyIfSubmittedAndNotAlwaysEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array('always_empty' => false));
+        $form = $this->factory->create(static::TESTED_TYPE, null, ['always_empty' => false]);
         $form->submit('pAs5w0rd');
 
         $this->assertSame('pAs5w0rd', $form->createView()->vars['value']);
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/RepeatedTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/RepeatedTypeTest.php
index 8021abdb84..c380c0590b 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/RepeatedTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/RepeatedTypeTest.php
@@ -26,9 +26,9 @@ class RepeatedTypeTest extends BaseTypeTest
     {
         parent::setUp();
 
-        $this->form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->form = $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
-        ));
+        ]);
     }
 
     public function testSetData()
@@ -41,10 +41,10 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetOptions()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
-            'options' => array('label' => 'Global'),
-        ));
+            'options' => ['label' => 'Global'],
+        ]);
 
         $this->assertSame('Global', $form['first']->getConfig()->getOption('label'));
         $this->assertSame('Global', $form['second']->getConfig()->getOption('label'));
@@ -54,12 +54,12 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetOptionsPerChild()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             // the global required value cannot be overridden
             'type' => TextTypeTest::TESTED_TYPE,
-            'first_options' => array('label' => 'Test', 'required' => false),
-            'second_options' => array('label' => 'Test2'),
-        ));
+            'first_options' => ['label' => 'Test', 'required' => false],
+            'second_options' => ['label' => 'Test2'],
+        ]);
 
         $this->assertSame('Test', $form['first']->getConfig()->getOption('label'));
         $this->assertSame('Test2', $form['second']->getConfig()->getOption('label'));
@@ -69,10 +69,10 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
             'type' => TextTypeTest::TESTED_TYPE,
-        ));
+        ]);
 
         $this->assertFalse($form['first']->isRequired());
         $this->assertFalse($form['second']->isRequired());
@@ -83,10 +83,10 @@ class RepeatedTypeTest extends BaseTypeTest
      */
     public function testSetInvalidOptions()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
             'options' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -94,10 +94,10 @@ class RepeatedTypeTest extends BaseTypeTest
      */
     public function testSetInvalidFirstOptions()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
             'first_options' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -105,17 +105,17 @@ class RepeatedTypeTest extends BaseTypeTest
      */
     public function testSetInvalidSecondOptions()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
             'second_options' => 'bad value',
-        ));
+        ]);
     }
 
     public function testSetErrorBubblingToTrue()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'error_bubbling' => true,
-        ));
+        ]);
 
         $this->assertTrue($form->getConfig()->getOption('error_bubbling'));
         $this->assertTrue($form['first']->getConfig()->getOption('error_bubbling'));
@@ -124,9 +124,9 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetErrorBubblingToFalse()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'error_bubbling' => false,
-        ));
+        ]);
 
         $this->assertFalse($form->getConfig()->getOption('error_bubbling'));
         $this->assertFalse($form['first']->getConfig()->getOption('error_bubbling'));
@@ -135,11 +135,11 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetErrorBubblingIndividually()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'error_bubbling' => true,
-            'options' => array('error_bubbling' => false),
-            'second_options' => array('error_bubbling' => true),
-        ));
+            'options' => ['error_bubbling' => false],
+            'second_options' => ['error_bubbling' => true],
+        ]);
 
         $this->assertTrue($form->getConfig()->getOption('error_bubbling'));
         $this->assertFalse($form['first']->getConfig()->getOption('error_bubbling'));
@@ -148,11 +148,11 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSetOptionsPerChildAndOverwrite()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'type' => TextTypeTest::TESTED_TYPE,
-            'options' => array('label' => 'Label'),
-            'second_options' => array('label' => 'Second label'),
-        ));
+            'options' => ['label' => 'Label'],
+            'second_options' => ['label' => 'Second label'],
+        ]);
 
         $this->assertSame('Label', $form['first']->getConfig()->getOption('label'));
         $this->assertSame('Second label', $form['second']->getConfig()->getOption('label'));
@@ -162,7 +162,7 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSubmitUnequal()
     {
-        $input = array('first' => 'foo', 'second' => 'bar');
+        $input = ['first' => 'foo', 'second' => 'bar'];
 
         $this->form->submit($input);
 
@@ -175,7 +175,7 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSubmitEqual()
     {
-        $input = array('first' => 'foo', 'second' => 'foo');
+        $input = ['first' => 'foo', 'second' => 'foo'];
 
         $this->form->submit($input);
 
@@ -188,6 +188,6 @@ class RepeatedTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        parent::testSubmitNull($expected, $norm, array('first' => null, 'second' => null));
+        parent::testSubmitNull($expected, $norm, ['first' => null, 'second' => null]);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TextTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TextTypeTest.php
index c4dba37348..42853f607f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TextTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TextTypeTest.php
@@ -22,9 +22,9 @@ class TextTypeTest extends BaseTypeTest
 
     public function testSubmitNullReturnsNullWithEmptyDataAsString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, 'name', array(
+        $form = $this->factory->create(static::TESTED_TYPE, 'name', [
             'empty_data' => '',
-        ));
+        ]);
 
         $form->submit(null);
         $this->assertSame('', $form->getData());
@@ -34,11 +34,11 @@ class TextTypeTest extends BaseTypeTest
 
     public function provideZeros()
     {
-        return array(
-            array(0, '0'),
-            array('0', '0'),
-            array('00000', '00000'),
-        );
+        return [
+            [0, '0'],
+            ['0', '0'],
+            ['00000', '00000'],
+        ];
     }
 
     /**
@@ -48,9 +48,9 @@ class TextTypeTest extends BaseTypeTest
      */
     public function testSetDataThroughParamsWithZero($data, $dataAsString)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'data' => $data,
-        ));
+        ]);
         $view = $form->createView();
 
         $this->assertFalse($form->isEmpty());
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
index bedc93212d..88c190be0d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimeTypeTest.php
@@ -20,16 +20,16 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitDateTime()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime',
-        ));
+        ]);
 
-        $input = array(
+        $input = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit($input);
 
@@ -41,16 +41,16 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitDateTimeImmutable()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime_immutable',
-        ));
+        ]);
 
-        $input = array(
+        $input = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit($input);
 
@@ -63,16 +63,16 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
-        ));
+        ]);
 
-        $input = array(
+        $input = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit($input);
 
@@ -82,16 +82,16 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitTimestamp()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'timestamp',
-        ));
+        ]);
 
-        $input = array(
+        $input = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit($input);
 
@@ -103,16 +103,16 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'array',
-        ));
+        ]);
 
-        $input = array(
+        $input = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit($input);
 
@@ -122,12 +122,12 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitDatetimeSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $form->submit('03:04');
 
@@ -137,13 +137,13 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitDatetimeSingleTextWithoutMinutes()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime',
             'widget' => 'single_text',
             'with_minutes' => false,
-        ));
+        ]);
 
         $form->submit('03');
 
@@ -153,17 +153,17 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitArraySingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'array',
             'widget' => 'single_text',
-        ));
+        ]);
 
-        $data = array(
+        $data = [
             'hour' => '3',
             'minute' => '4',
-        );
+        ];
 
         $form->submit('03:04');
 
@@ -173,17 +173,17 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitArraySingleTextWithoutMinutes()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'array',
             'widget' => 'single_text',
             'with_minutes' => false,
-        ));
+        ]);
 
-        $data = array(
+        $data = [
             'hour' => '3',
-        );
+        ];
 
         $form->submit('03');
 
@@ -193,19 +193,19 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitArraySingleTextWithSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'array',
             'widget' => 'single_text',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $data = array(
+        $data = [
             'hour' => '3',
             'minute' => '4',
             'second' => '5',
-        );
+        ];
 
         $form->submit('03:04:05');
 
@@ -215,12 +215,12 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleText()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'widget' => 'single_text',
-        ));
+        ]);
 
         $form->submit('03:04');
 
@@ -230,13 +230,13 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitStringSingleTextWithoutMinutes()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'widget' => 'single_text',
             'with_minutes' => false,
-        ));
+        ]);
 
         $form->submit('03');
 
@@ -246,13 +246,13 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitWithSecondsAndBrowserOmissionSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'string',
             'widget' => 'single_text',
             'with_seconds' => true,
-        ));
+        ]);
 
         $form->submit('03:04');
 
@@ -262,40 +262,40 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSetDataWithoutMinutes()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime',
             'with_minutes' => false,
-        ));
+        ]);
 
         $form->setData(new \DateTime('03:04:05 UTC'));
 
-        $this->assertEquals(array('hour' => 3), $form->getViewData());
+        $this->assertEquals(['hour' => 3], $form->getViewData());
     }
 
     public function testSetDataWithSeconds()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'UTC',
             'view_timezone' => 'UTC',
             'input' => 'datetime',
             'with_seconds' => true,
-        ));
+        ]);
 
         $form->setData(new \DateTime('03:04:05 UTC'));
 
-        $this->assertEquals(array('hour' => 3, 'minute' => 4, 'second' => 5), $form->getViewData());
+        $this->assertEquals(['hour' => 3, 'minute' => 4, 'second' => 5], $form->getViewData());
     }
 
     public function testSetDataDifferentTimezones()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'America/New_York',
             'view_timezone' => 'Asia/Hong_Kong',
             'input' => 'string',
             'with_seconds' => true,
-        ));
+        ]);
 
         $dateTime = new \DateTime('2013-01-01 12:04:05');
         $dateTime->setTimezone(new \DateTimeZone('America/New_York'));
@@ -305,23 +305,23 @@ class TimeTypeTest extends BaseTypeTest
         $outputTime = clone $dateTime;
         $outputTime->setTimezone(new \DateTimeZone('Asia/Hong_Kong'));
 
-        $displayedData = array(
+        $displayedData = [
             'hour' => (int) $outputTime->format('H'),
             'minute' => (int) $outputTime->format('i'),
             'second' => (int) $outputTime->format('s'),
-        );
+        ];
 
         $this->assertEquals($displayedData, $form->getViewData());
     }
 
     public function testSetDataDifferentTimezonesDateTime()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'model_timezone' => 'America/New_York',
             'view_timezone' => 'Asia/Hong_Kong',
             'input' => 'datetime',
             'with_seconds' => true,
-        ));
+        ]);
 
         $dateTime = new \DateTime('12:04:05');
         $dateTime->setTimezone(new \DateTimeZone('America/New_York'));
@@ -331,11 +331,11 @@ class TimeTypeTest extends BaseTypeTest
         $outputTime = clone $dateTime;
         $outputTime->setTimezone(new \DateTimeZone('Asia/Hong_Kong'));
 
-        $displayedData = array(
+        $displayedData = [
             'hour' => (int) $outputTime->format('H'),
             'minute' => (int) $outputTime->format('i'),
             'second' => (int) $outputTime->format('s'),
-        );
+        ];
 
         $this->assertEquals($dateTime, $form->getData());
         $this->assertEquals($displayedData, $form->getViewData());
@@ -343,59 +343,59 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testHoursOption()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'hours' => array(6, 7),
-        ));
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'hours' => [6, 7],
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView('6', '6', '06'),
             new ChoiceView('7', '7', '07'),
-        ), $view['hour']->vars['choices']);
+        ], $view['hour']->vars['choices']);
     }
 
     public function testIsMinuteWithinRangeReturnsTrueIfWithin()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'minutes' => array(6, 7),
-        ));
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'minutes' => [6, 7],
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView('6', '6', '06'),
             new ChoiceView('7', '7', '07'),
-        ), $view['minute']->vars['choices']);
+        ], $view['minute']->vars['choices']);
     }
 
     public function testIsSecondWithinRangeReturnsTrueIfWithin()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'seconds' => array(6, 7),
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'seconds' => [6, 7],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ChoiceView('6', '6', '06'),
             new ChoiceView('7', '7', '07'),
-        ), $view['second']->vars['choices']);
+        ], $view['second']->vars['choices']);
     }
 
     public function testIsPartiallyFilledReturnsFalseIfCompletelyEmpty()
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '',
             'minute' => '',
-        ));
+        ]);
 
         $this->assertFalse($form->isPartiallyFilled());
     }
@@ -404,16 +404,16 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '',
             'minute' => '',
             'second' => '',
-        ));
+        ]);
 
         $this->assertFalse($form->isPartiallyFilled());
     }
@@ -422,14 +422,14 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '0',
             'minute' => '0',
-        ));
+        ]);
 
         $this->assertFalse($form->isPartiallyFilled());
     }
@@ -438,16 +438,16 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '0',
             'minute' => '0',
             'second' => '0',
-        ));
+        ]);
 
         $this->assertFalse($form->isPartiallyFilled());
     }
@@ -456,16 +456,16 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '',
             'minute' => '0',
             'second' => '0',
-        ));
+        ]);
 
         $this->assertTrue($form->isPartiallyFilled());
     }
@@ -474,16 +474,16 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '0',
             'minute' => '',
             'second' => '0',
-        ));
+        ]);
 
         $this->assertTrue($form->isPartiallyFilled());
     }
@@ -492,16 +492,16 @@ class TimeTypeTest extends BaseTypeTest
     {
         $this->markTestIncomplete('Needs to be reimplemented using validators');
 
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'choice',
             'with_seconds' => true,
-        ));
+        ]);
 
-        $form->submit(array(
+        $form->submit([
             'hour' => '0',
             'minute' => '0',
             'second' => '',
-        ));
+        ]);
 
         $this->assertTrue($form->isPartiallyFilled());
     }
@@ -515,9 +515,9 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSingleTextWidgetShouldUseTheRightInputType()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertEquals('time', $view->vars['type']);
@@ -525,10 +525,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSingleTextWidgetWithSecondsShouldHaveRightStepAttribute()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertArrayHasKey('step', $view->vars['attr']);
@@ -537,13 +537,13 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSingleTextWidgetWithSecondsShouldNotOverrideStepAttribute()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'with_seconds' => true,
-            'attr' => array(
+            'attr' => [
                 'step' => 30,
-            ),
-        ));
+            ],
+        ]);
 
         $view = $form->createView();
         $this->assertArrayHasKey('step', $view->vars['attr']);
@@ -552,10 +552,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testDontPassHtml5TypeIfHtml5NotAllowed()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => 'single_text',
             'html5' => false,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertArrayNotHasKey('type', $view->vars);
@@ -563,10 +563,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassDefaultPlaceholderToViewIfNotRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('', $view['hour']->vars['placeholder']);
@@ -576,10 +576,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassNoPlaceholderToViewIfRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertNull($view['hour']->vars['placeholder']);
@@ -589,10 +589,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'placeholder' => 'Empty',
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('Empty', $view['hour']->vars['placeholder']);
@@ -602,14 +602,14 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'placeholder' => array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'placeholder' => [
                 'hour' => 'Empty hour',
                 'minute' => 'Empty minute',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('Empty hour', $view['hour']->vars['placeholder']);
@@ -619,14 +619,14 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddEmptyIfNotRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => false,
-            'placeholder' => array(
+            'placeholder' => [
                 'hour' => 'Empty hour',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('Empty hour', $view['hour']->vars['placeholder']);
@@ -636,14 +636,14 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassPlaceholderAsPartialArrayAddNullIfRequired()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'required' => true,
-            'placeholder' => array(
+            'placeholder' => [
                 'hour' => 'Empty hour',
                 'second' => 'Empty second',
-            ),
+            ],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('Empty hour', $view['hour']->vars['placeholder']);
@@ -653,10 +653,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function provideCompoundWidgets()
     {
-        return array(
-            array('text'),
-            array('choice'),
-        );
+        return [
+            ['text'],
+            ['choice'],
+        ];
     }
 
     /**
@@ -665,13 +665,13 @@ class TimeTypeTest extends BaseTypeTest
     public function testHourErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
-        ));
+        ]);
         $form['hour']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['hour']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['hour']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     /**
@@ -680,13 +680,13 @@ class TimeTypeTest extends BaseTypeTest
     public function testMinuteErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
-        ));
+        ]);
         $form['minute']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['minute']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['minute']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     /**
@@ -695,14 +695,14 @@ class TimeTypeTest extends BaseTypeTest
     public function testSecondErrorsBubbleUp($widget)
     {
         $error = new FormError('Invalid!');
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
             'with_seconds' => true,
-        ));
+        ]);
         $form['second']->addError($error);
 
-        $this->assertSame(array(), iterator_to_array($form['second']->getErrors()));
-        $this->assertSame(array($error), iterator_to_array($form->getErrors()));
+        $this->assertSame([], iterator_to_array($form['second']->getErrors()));
+        $this->assertSame([$error], iterator_to_array($form->getErrors()));
     }
 
     /**
@@ -710,10 +710,10 @@ class TimeTypeTest extends BaseTypeTest
      */
     public function testInitializeWithSecondsAndWithoutMinutes()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'with_minutes' => false,
             'with_seconds' => true,
-        ));
+        ]);
     }
 
     /**
@@ -721,9 +721,9 @@ class TimeTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfHoursIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'hours' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -731,9 +731,9 @@ class TimeTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfMinutesIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'minutes' => 'bad value',
-        ));
+        ]);
     }
 
     /**
@@ -741,9 +741,9 @@ class TimeTypeTest extends BaseTypeTest
      */
     public function testThrowExceptionIfSecondsIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
+        $this->factory->create(static::TESTED_TYPE, null, [
             'seconds' => 'bad value',
-        ));
+        ]);
     }
 
     public function testPassDefaultChoiceTranslationDomain()
@@ -757,10 +757,10 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsString()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'choice_translation_domain' => 'messages',
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('messages', $view['hour']->vars['choice_translation_domain']);
@@ -770,13 +770,13 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testPassChoiceTranslationDomainAsArray()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
-            'choice_translation_domain' => array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
+            'choice_translation_domain' => [
                 'hour' => 'foo',
                 'second' => 'test',
-            ),
+            ],
             'with_seconds' => true,
-        ));
+        ]);
 
         $view = $form->createView();
         $this->assertSame('foo', $view['hour']->vars['choice_translation_domain']);
@@ -786,20 +786,20 @@ class TimeTypeTest extends BaseTypeTest
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
-        $view = array('hour' => '', 'minute' => '');
+        $view = ['hour' => '', 'minute' => ''];
 
         parent::testSubmitNull($expected, $norm, $view);
     }
 
-    public function testSubmitNullUsesDefaultEmptyData($emptyData = array(), $expectedData = null)
+    public function testSubmitNullUsesDefaultEmptyData($emptyData = [], $expectedData = null)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // view transformer writes back empty strings in the view data
-        $this->assertSame(array('hour' => '', 'minute' => ''), $form->getViewData());
+        $this->assertSame(['hour' => '', 'minute' => ''], $form->getViewData());
         $this->assertSame($expectedData, $form->getNormData());
         $this->assertSame($expectedData, $form->getData());
     }
@@ -809,10 +809,10 @@ class TimeTypeTest extends BaseTypeTest
      */
     public function testSubmitNullUsesDateEmptyData($widget, $emptyData, $expectedData)
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'widget' => $widget,
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -824,10 +824,10 @@ class TimeTypeTest extends BaseTypeTest
     {
         $expectedData = \DateTime::createFromFormat('Y-m-d H:i', '1970-01-01 21:23');
 
-        return array(
-            'Simple field' => array('single_text', '21:23', $expectedData),
-            'Compound text field' => array('text', array('hour' => '21', 'minute' => '23'), $expectedData),
-            'Compound choice field' => array('choice', array('hour' => '21', 'minute' => '23'), $expectedData),
-        );
+        return [
+            'Simple field' => ['single_text', '21:23', $expectedData],
+            'Compound text field' => ['text', ['hour' => '21', 'minute' => '23'], $expectedData],
+            'Compound choice field' => ['choice', ['hour' => '21', 'minute' => '23'], $expectedData],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimezoneTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimezoneTypeTest.php
index 7f61a723a9..621bc2b055 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimezoneTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/TimezoneTypeTest.php
@@ -36,9 +36,9 @@ class TimezoneTypeTest extends BaseTypeTest
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'Africa/Kinshasa', $expectedData = 'Africa/Kinshasa')
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         $this->assertSame($emptyData, $form->getViewData());
@@ -48,7 +48,7 @@ class TimezoneTypeTest extends BaseTypeTest
 
     public function testDateTimeZoneInput()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, new \DateTimeZone('America/New_York'), array('input' => 'datetimezone'));
+        $form = $this->factory->create(static::TESTED_TYPE, new \DateTimeZone('America/New_York'), ['input' => 'datetimezone']);
 
         $this->assertSame('America/New_York', $form->createView()->vars['value']);
 
@@ -56,13 +56,13 @@ class TimezoneTypeTest extends BaseTypeTest
 
         $this->assertEquals(new \DateTimeZone('Europe/Amsterdam'), $form->getData());
 
-        $form = $this->factory->create(static::TESTED_TYPE, array(new \DateTimeZone('America/New_York')), array('input' => 'datetimezone', 'multiple' => true));
+        $form = $this->factory->create(static::TESTED_TYPE, [new \DateTimeZone('America/New_York')], ['input' => 'datetimezone', 'multiple' => true]);
 
-        $this->assertSame(array('America/New_York'), $form->createView()->vars['value']);
+        $this->assertSame(['America/New_York'], $form->createView()->vars['value']);
 
-        $form->submit(array('Europe/Amsterdam', 'Europe/Paris'));
+        $form->submit(['Europe/Amsterdam', 'Europe/Paris']);
 
-        $this->assertEquals(array(new \DateTimeZone('Europe/Amsterdam'), new \DateTimeZone('Europe/Paris')), $form->getData());
+        $this->assertEquals([new \DateTimeZone('Europe/Amsterdam'), new \DateTimeZone('Europe/Paris')], $form->getData());
     }
 
     /**
@@ -71,7 +71,7 @@ class TimezoneTypeTest extends BaseTypeTest
      */
     public function testFilterByRegions()
     {
-        $choices = $this->factory->create(static::TESTED_TYPE, null, array('regions' => \DateTimeZone::EUROPE))
+        $choices = $this->factory->create(static::TESTED_TYPE, null, ['regions' => \DateTimeZone::EUROPE])
             ->createView()->vars['choices'];
 
         $this->assertContains(new ChoiceView('Europe/Amsterdam', 'Europe/Amsterdam', 'Amsterdam'), $choices, '', false, false);
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
index c80a8b7cfb..a5608557dd 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
@@ -27,9 +27,9 @@ class UrlTypeTest extends TextTypeTest
 
     public function testSubmitAddsNoDefaultProtocolIfAlreadyIncluded()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'default_protocol' => 'http',
-        ));
+        ]);
 
         $form->submit('ftp://www.domain.com');
 
@@ -39,9 +39,9 @@ class UrlTypeTest extends TextTypeTest
 
     public function testSubmitAddsNoDefaultProtocolIfEmpty()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'default_protocol' => 'http',
-        ));
+        ]);
 
         $form->submit('');
 
@@ -51,9 +51,9 @@ class UrlTypeTest extends TextTypeTest
 
     public function testSubmitAddsNoDefaultProtocolIfNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'default_protocol' => 'http',
-        ));
+        ]);
 
         $form->submit(null);
 
@@ -63,9 +63,9 @@ class UrlTypeTest extends TextTypeTest
 
     public function testSubmitAddsNoDefaultProtocolIfSetToNull()
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'default_protocol' => null,
-        ));
+        ]);
 
         $form->submit('www.domain.com');
 
@@ -78,16 +78,16 @@ class UrlTypeTest extends TextTypeTest
      */
     public function testThrowExceptionIfDefaultProtocolIsInvalid()
     {
-        $this->factory->create(static::TESTED_TYPE, null, array(
-            'default_protocol' => array(),
-        ));
+        $this->factory->create(static::TESTED_TYPE, null, [
+            'default_protocol' => [],
+        ]);
     }
 
     public function testSubmitNullUsesDefaultEmptyData($emptyData = 'empty', $expectedData = 'http://empty')
     {
-        $form = $this->factory->create(static::TESTED_TYPE, null, array(
+        $form = $this->factory->create(static::TESTED_TYPE, null, [
             'empty_data' => $emptyData,
-        ));
+        ]);
         $form->submit(null);
 
         // listener normalizes data on submit
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
index e9d9947774..33783d6a04 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/EventListener/CsrfValidationListenerTest.php
@@ -43,7 +43,7 @@ class CsrfValidationListenerTest extends TestCase
 
     protected function getBuilder($name = 'name')
     {
-        return new FormBuilder($name, null, $this->dispatcher, $this->factory, array('compound' => true));
+        return new FormBuilder($name, null, $this->dispatcher, $this->factory, ['compound' => true]);
     }
 
     protected function getForm($name = 'name')
@@ -88,7 +88,7 @@ class CsrfValidationListenerTest extends TestCase
             ->willReturn(true)
         ;
 
-        $event = new FormEvent($this->form, array('csrf' => 'token'));
+        $event = new FormEvent($this->form, ['csrf' => 'token']);
         $validation = new CsrfValidationListener('csrf', $this->tokenManager, 'unknown', 'Error message', null, null, $serverParams);
 
         $validation->preSubmit($event);
diff --git a/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
index 73740f6416..5478db9b83 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Csrf/Type/FormTypeCsrfExtensionTest.php
@@ -60,18 +60,18 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
 
     protected function getExtensions()
     {
-        return array_merge(parent::getExtensions(), array(
+        return array_merge(parent::getExtensions(), [
             new CsrfExtension($this->tokenManager, $this->translator),
-        ));
+        ]);
     }
 
     public function testCsrfProtectionByDefaultIfRootAndCompound()
     {
         $view = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'compound' => true,
-            ))
+            ])
             ->createView();
 
         $this->assertArrayHasKey('csrf', $view);
@@ -82,10 +82,10 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
         $view = $this->factory
             ->createNamedBuilder('root', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             ->add($this->factory
-                ->createNamedBuilder('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+                ->createNamedBuilder('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                     'csrf_field_name' => 'csrf',
                     'compound' => true,
-                ))
+                ])
             )
             ->getForm()
             ->get('form')
@@ -97,10 +97,10 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
     public function testNoCsrfProtectionByDefaultIfRootButNotCompound()
     {
         $view = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'compound' => false,
-            ))
+            ])
             ->createView();
 
         $this->assertArrayNotHasKey('csrf', $view);
@@ -109,11 +109,11 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
     public function testCsrfProtectionCanBeDisabled()
     {
         $view = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_protection' => false,
                 'compound' => true,
-            ))
+            ])
             ->createView();
 
         $this->assertArrayNotHasKey('csrf', $view);
@@ -127,12 +127,12 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue(new CsrfToken('TOKEN_ID', 'token')));
 
         $view = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'csrf_token_id' => 'TOKEN_ID',
                 'compound' => true,
-            ))
+            ])
             ->createView();
 
         $this->assertEquals('token', $view['csrf']->vars['value']);
@@ -146,11 +146,11 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue('token'));
 
         $view = $this->factory
-            ->createNamed('FORM_NAME', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createNamed('FORM_NAME', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'compound' => true,
-            ))
+            ])
             ->createView();
 
         $this->assertEquals('token', $view['csrf']->vars['value']);
@@ -164,11 +164,11 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue('token'));
 
         $view = $this->factory
-            ->createNamed('', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createNamed('', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'compound' => true,
-            ))
+            ])
             ->createView();
 
         $this->assertEquals('token', $view['csrf']->vars['value']);
@@ -176,10 +176,10 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
 
     public function provideBoolean()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     /**
@@ -193,22 +193,22 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue($valid));
 
         $form = $this->factory
-            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'csrf_token_id' => 'TOKEN_ID',
                 'compound' => true,
-            ))
+            ])
             ->add('child', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'child' => 'foobar',
             'csrf' => 'token',
-        ));
+        ]);
 
         // Remove token from data
-        $this->assertSame(array('child' => 'foobar'), $form->getData());
+        $this->assertSame(['child' => 'foobar'], $form->getData());
 
         // Validate accordingly
         $this->assertSame($valid, $form->isValid());
@@ -225,21 +225,21 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue($valid));
 
         $form = $this->factory
-            ->createNamedBuilder('FORM_NAME', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createNamedBuilder('FORM_NAME', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'compound' => true,
-            ))
+            ])
             ->add('child', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'child' => 'foobar',
             'csrf' => 'token',
-        ));
+        ]);
 
         // Remove token from data
-        $this->assertSame(array('child' => 'foobar'), $form->getData());
+        $this->assertSame(['child' => 'foobar'], $form->getData());
 
         // Validate accordingly
         $this->assertSame($valid, $form->isValid());
@@ -256,21 +256,21 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->will($this->returnValue($valid));
 
         $form = $this->factory
-            ->createNamedBuilder('', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createNamedBuilder('', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'compound' => true,
-            ))
+            ])
             ->add('child', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'child' => 'foobar',
             'csrf' => 'token',
-        ));
+        ]);
 
         // Remove token from data
-        $this->assertSame(array('child' => 'foobar'), $form->getData());
+        $this->assertSame(['child' => 'foobar'], $form->getData());
 
         // Validate accordingly
         $this->assertSame($valid, $form->isValid());
@@ -282,22 +282,22 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->method('isTokenValid');
 
         $form = $this->factory
-            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'csrf_token_id' => 'TOKEN_ID',
                 'compound' => true,
-            ))
+            ])
             ->add('child', 'Symfony\Component\Form\Extension\Core\Type\TextType')
             ->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'child' => 'foobar',
             // token is missing
-        ));
+        ]);
 
         // Remove token from data
-        $this->assertSame(array('child' => 'foobar'), $form->getData());
+        $this->assertSame(['child' => 'foobar'], $form->getData());
 
         // Validate accordingly
         $this->assertFalse($form->isValid());
@@ -311,20 +311,20 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
         $form = $this->factory
             ->createNamedBuilder('root', 'Symfony\Component\Form\Extension\Core\Type\FormType')
             ->add($this->factory
-                ->createNamedBuilder('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+                ->createNamedBuilder('form', 'Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                     'csrf_field_name' => 'csrf',
                     'csrf_token_manager' => $this->tokenManager,
                     'csrf_token_id' => 'TOKEN_ID',
                     'compound' => true,
-                ))
+                ])
             )
             ->getForm()
             ->get('form');
 
-        $form->submit(array(
+        $form->submit([
             'child' => 'foobar',
             'csrf' => 'token',
-        ));
+        ]);
     }
 
     public function testDontValidateTokenIfRootButNotCompound()
@@ -333,29 +333,29 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
             ->method('isTokenValid');
 
         $form = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'csrf_token_id' => 'TOKEN_ID',
                 'compound' => false,
-            ));
+            ]);
 
-        $form->submit(array(
+        $form->submit([
             'csrf' => 'token',
-        ));
+        ]);
     }
 
     public function testNoCsrfProtectionOnPrototype()
     {
         $prototypeView = $this->factory
-            ->create('Symfony\Component\Form\Extension\Core\Type\CollectionType', null, array(
+            ->create('Symfony\Component\Form\Extension\Core\Type\CollectionType', null, [
                 'entry_type' => __CLASS__.'_ChildType',
-                'entry_options' => array(
+                'entry_options' => [
                     'csrf_field_name' => 'csrf',
-                ),
+                ],
                 'prototype' => true,
                 'allow_add' => true,
-            ))
+            ])
             ->createView()
             ->vars['prototype'];
 
@@ -377,21 +377,21 @@ class FormTypeCsrfExtensionTest extends TypeTestCase
              ->will($this->returnValue('[trans]Foobar[/trans]'));
 
         $form = $this->factory
-            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, array(
+            ->createBuilder('Symfony\Component\Form\Extension\Core\Type\FormType', null, [
                 'csrf_field_name' => 'csrf',
                 'csrf_token_manager' => $this->tokenManager,
                 'csrf_message' => 'Foobar',
                 'csrf_token_id' => 'TOKEN_ID',
                 'compound' => true,
-            ))
+            ])
             ->getForm();
 
-        $form->submit(array(
+        $form->submit([
             'csrf' => 'token',
-        ));
+        ]);
 
         $errors = $form->getErrors();
-        $expected = new FormError('[trans]Foobar[/trans]', null, array(), null, $csrfToken);
+        $expected = new FormError('[trans]Foobar[/trans]', null, [], null, $csrfToken);
         $expected->setOrigin($form);
 
         $this->assertGreaterThan(0, \count($errors));
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
index 3bfef60253..2ca0f95f3c 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataCollectorTest.php
@@ -84,62 +84,62 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($this->form)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($this->childForm)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         $this->dataExtractor->expects($this->at(2))
             ->method('extractDefaultData')
             ->with($this->form)
-            ->will($this->returnValue(array('default_data' => 'foo')));
+            ->will($this->returnValue(['default_data' => 'foo']));
         $this->dataExtractor->expects($this->at(3))
             ->method('extractDefaultData')
             ->with($this->childForm)
-            ->will($this->returnValue(array('default_data' => 'bar')));
+            ->will($this->returnValue(['default_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(4))
             ->method('extractSubmittedData')
             ->with($this->form)
-            ->will($this->returnValue(array('submitted_data' => 'foo')));
+            ->will($this->returnValue(['submitted_data' => 'foo']));
         $this->dataExtractor->expects($this->at(5))
             ->method('extractSubmittedData')
             ->with($this->childForm)
-            ->will($this->returnValue(array('submitted_data' => 'bar')));
+            ->will($this->returnValue(['submitted_data' => 'bar']));
 
         $this->dataCollector->collectConfiguration($this->form);
         $this->dataCollector->collectDefaultData($this->form);
         $this->dataCollector->collectSubmittedData($this->form);
         $this->dataCollector->buildPreliminaryFormTree($this->form);
 
-        $childFormData = array(
+        $childFormData = [
              'config' => 'bar',
              'default_data' => 'bar',
              'submitted_data' => 'bar',
-             'children' => array(),
-         );
+             'children' => [],
+         ];
 
-        $formData = array(
+        $formData = [
              'config' => 'foo',
              'default_data' => 'foo',
              'submitted_data' => 'foo',
              'has_children_error' => false,
-             'children' => array(
+             'children' => [
                  'child' => $childFormData,
-             ),
-         );
+             ],
+         ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 spl_object_hash($this->childForm) => $childFormData,
-            ),
+            ],
             'nb_errors' => 0,
-         ), $this->dataCollector->getData());
+         ], $this->dataCollector->getData());
     }
 
     public function testBuildMultiplePreliminaryFormTrees()
@@ -150,49 +150,49 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($form1)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($form2)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         $this->dataCollector->collectConfiguration($form1);
         $this->dataCollector->collectConfiguration($form2);
         $this->dataCollector->buildPreliminaryFormTree($form1);
 
-        $form1Data = array(
+        $form1Data = [
             'config' => 'foo',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'form1' => $form1Data,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($form1) => $form1Data,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
 
         $this->dataCollector->buildPreliminaryFormTree($form2);
 
-        $form2Data = array(
+        $form2Data = [
             'config' => 'bar',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'form1' => $form1Data,
                 'form2' => $form2Data,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($form1) => $form1Data,
                 spl_object_hash($form2) => $form2Data,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testBuildSamePreliminaryFormTreeMultipleTimes()
@@ -200,68 +200,68 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($this->form)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
 
         $this->dataExtractor->expects($this->at(1))
             ->method('extractDefaultData')
             ->with($this->form)
-            ->will($this->returnValue(array('default_data' => 'foo')));
+            ->will($this->returnValue(['default_data' => 'foo']));
 
         $this->dataCollector->collectConfiguration($this->form);
         $this->dataCollector->buildPreliminaryFormTree($this->form);
 
-        $formData = array(
+        $formData = [
             'config' => 'foo',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
 
         $this->dataCollector->collectDefaultData($this->form);
         $this->dataCollector->buildPreliminaryFormTree($this->form);
 
-        $formData = array(
+        $formData = [
             'config' => 'foo',
             'default_data' => 'foo',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testBuildPreliminaryFormTreeWithoutCollectingAnyData()
     {
         $this->dataCollector->buildPreliminaryFormTree($this->form);
 
-        $formData = array(
-            'children' => array(),
-        );
+        $formData = [
+            'children' => [],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testBuildFinalFormTree()
@@ -272,39 +272,39 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($this->form)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($this->childForm)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         $this->dataExtractor->expects($this->at(2))
             ->method('extractDefaultData')
             ->with($this->form)
-            ->will($this->returnValue(array('default_data' => 'foo')));
+            ->will($this->returnValue(['default_data' => 'foo']));
         $this->dataExtractor->expects($this->at(3))
             ->method('extractDefaultData')
             ->with($this->childForm)
-            ->will($this->returnValue(array('default_data' => 'bar')));
+            ->will($this->returnValue(['default_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(4))
             ->method('extractSubmittedData')
             ->with($this->form)
-            ->will($this->returnValue(array('submitted_data' => 'foo')));
+            ->will($this->returnValue(['submitted_data' => 'foo']));
         $this->dataExtractor->expects($this->at(5))
             ->method('extractSubmittedData')
             ->with($this->childForm)
-            ->will($this->returnValue(array('submitted_data' => 'bar')));
+            ->will($this->returnValue(['submitted_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(6))
             ->method('extractViewVariables')
             ->with($this->view)
-            ->will($this->returnValue(array('view_vars' => 'foo')));
+            ->will($this->returnValue(['view_vars' => 'foo']));
 
         $this->dataExtractor->expects($this->at(7))
             ->method('extractViewVariables')
             ->with($this->childView)
-            ->will($this->returnValue(array('view_vars' => 'bar')));
+            ->will($this->returnValue(['view_vars' => 'bar']));
 
         $this->dataCollector->collectConfiguration($this->form);
         $this->dataCollector->collectDefaultData($this->form);
@@ -312,35 +312,35 @@ class FormDataCollectorTest extends TestCase
         $this->dataCollector->collectViewVariables($this->view);
         $this->dataCollector->buildFinalFormTree($this->form, $this->view);
 
-        $childFormData = array(
+        $childFormData = [
             'view_vars' => 'bar',
             'config' => 'bar',
             'default_data' => 'bar',
             'submitted_data' => 'bar',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $formData = array(
+        $formData = [
             'view_vars' => 'foo',
             'config' => 'foo',
             'default_data' => 'foo',
             'submitted_data' => 'foo',
             'has_children_error' => false,
-            'children' => array(
+            'children' => [
                 'child' => $childFormData,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 spl_object_hash($this->childForm) => $childFormData,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testSerializeWithFormAddedMultipleTimes()
@@ -365,76 +365,76 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($form1)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($child1)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         $this->dataExtractor->expects($this->at(2))
             ->method('extractDefaultData')
             ->with($form1)
-            ->will($this->returnValue(array('default_data' => 'foo')));
+            ->will($this->returnValue(['default_data' => 'foo']));
         $this->dataExtractor->expects($this->at(3))
             ->method('extractDefaultData')
             ->with($child1)
-            ->will($this->returnValue(array('default_data' => 'bar')));
+            ->will($this->returnValue(['default_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(4))
             ->method('extractSubmittedData')
             ->with($form1)
-            ->will($this->returnValue(array('submitted_data' => 'foo')));
+            ->will($this->returnValue(['submitted_data' => 'foo']));
         $this->dataExtractor->expects($this->at(5))
             ->method('extractSubmittedData')
             ->with($child1)
-            ->will($this->returnValue(array('submitted_data' => 'bar')));
+            ->will($this->returnValue(['submitted_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(6))
             ->method('extractViewVariables')
             ->with($form1View)
-            ->will($this->returnValue(array('view_vars' => 'foo')));
+            ->will($this->returnValue(['view_vars' => 'foo']));
 
         $this->dataExtractor->expects($this->at(7))
             ->method('extractViewVariables')
             ->with($child1View)
-            ->will($this->returnValue(array('view_vars' => $child1View->vars)));
+            ->will($this->returnValue(['view_vars' => $child1View->vars]));
 
         $this->dataExtractor->expects($this->at(8))
             ->method('extractConfiguration')
             ->with($form2)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(9))
             ->method('extractConfiguration')
             ->with($child1)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         $this->dataExtractor->expects($this->at(10))
             ->method('extractDefaultData')
             ->with($form2)
-            ->will($this->returnValue(array('default_data' => 'foo')));
+            ->will($this->returnValue(['default_data' => 'foo']));
         $this->dataExtractor->expects($this->at(11))
             ->method('extractDefaultData')
             ->with($child1)
-            ->will($this->returnValue(array('default_data' => 'bar')));
+            ->will($this->returnValue(['default_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(12))
             ->method('extractSubmittedData')
             ->with($form2)
-            ->will($this->returnValue(array('submitted_data' => 'foo')));
+            ->will($this->returnValue(['submitted_data' => 'foo']));
         $this->dataExtractor->expects($this->at(13))
             ->method('extractSubmittedData')
             ->with($child1)
-            ->will($this->returnValue(array('submitted_data' => 'bar')));
+            ->will($this->returnValue(['submitted_data' => 'bar']));
 
         $this->dataExtractor->expects($this->at(14))
             ->method('extractViewVariables')
             ->with($form2View)
-            ->will($this->returnValue(array('view_vars' => 'foo')));
+            ->will($this->returnValue(['view_vars' => 'foo']));
 
         $this->dataExtractor->expects($this->at(15))
             ->method('extractViewVariables')
             ->with($child1View)
-            ->will($this->returnValue(array('view_vars' => $child1View->vars)));
+            ->will($this->returnValue(['view_vars' => $child1View->vars]));
 
         $this->dataCollector->collectConfiguration($form1);
         $this->dataCollector->collectDefaultData($form1);
@@ -460,53 +460,53 @@ class FormDataCollectorTest extends TestCase
 
         $this->dataCollector->buildPreliminaryFormTree($this->form);
 
-        $child1Data = array(
-            'children' => array(),
-        );
+        $child1Data = [
+            'children' => [],
+        ];
 
-        $child2Data = array(
-            'children' => array(),
-        );
+        $child2Data = [
+            'children' => [],
+        ];
 
-        $formData = array(
-            'children' => array(
+        $formData = [
+            'children' => [
                 'first' => $child1Data,
                 'second' => $child2Data,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 spl_object_hash($child1) => $child1Data,
                 spl_object_hash($child2) => $child2Data,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
 
         $this->dataCollector->buildFinalFormTree($this->form, $this->view);
 
-        $formData = array(
-            'children' => array(
+        $formData = [
+            'children' => [
                 // "first" not present in FormView
                 'second' => $child2Data,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 spl_object_hash($child1) => $child1Data,
                 spl_object_hash($child2) => $child2Data,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testChildViewsCanBeWithoutCorrespondingChildForms()
@@ -518,11 +518,11 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($this->form)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($this->childForm)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         // explicitly call collectConfiguration(), since $this->childForm is not
         // contained in the form tree
@@ -530,28 +530,28 @@ class FormDataCollectorTest extends TestCase
         $this->dataCollector->collectConfiguration($this->childForm);
         $this->dataCollector->buildFinalFormTree($this->form, $this->view);
 
-        $childFormData = array(
+        $childFormData = [
             // no "config" key
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $formData = array(
+        $formData = [
             'config' => 'foo',
-            'children' => array(
+            'children' => [
                 'child' => $childFormData,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 // no child entry
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testChildViewsWithoutCorrespondingChildFormsMayBeExplicitlyAssociated()
@@ -566,11 +566,11 @@ class FormDataCollectorTest extends TestCase
         $this->dataExtractor->expects($this->at(0))
             ->method('extractConfiguration')
             ->with($this->form)
-            ->will($this->returnValue(array('config' => 'foo')));
+            ->will($this->returnValue(['config' => 'foo']));
         $this->dataExtractor->expects($this->at(1))
             ->method('extractConfiguration')
             ->with($this->childForm)
-            ->will($this->returnValue(array('config' => 'bar')));
+            ->will($this->returnValue(['config' => 'bar']));
 
         // explicitly call collectConfiguration(), since $this->childForm is not
         // contained in the form tree
@@ -578,28 +578,28 @@ class FormDataCollectorTest extends TestCase
         $this->dataCollector->collectConfiguration($this->childForm);
         $this->dataCollector->buildFinalFormTree($this->form, $this->view);
 
-        $childFormData = array(
+        $childFormData = [
             'config' => 'bar',
-            'children' => array(),
-        );
+            'children' => [],
+        ];
 
-        $formData = array(
+        $formData = [
             'config' => 'foo',
-            'children' => array(
+            'children' => [
                 'child' => $childFormData,
-            ),
-        );
+            ],
+        ];
 
-        $this->assertSame(array(
-            'forms' => array(
+        $this->assertSame([
+            'forms' => [
                 'name' => $formData,
-            ),
-            'forms_by_hash' => array(
+            ],
+            'forms_by_hash' => [
                 spl_object_hash($this->form) => $formData,
                 spl_object_hash($this->childForm) => $childFormData,
-            ),
+            ],
             'nb_errors' => 0,
-        ), $this->dataCollector->getData());
+        ], $this->dataCollector->getData());
     }
 
     public function testCollectSubmittedDataCountsErrors()
@@ -611,22 +611,22 @@ class FormDataCollectorTest extends TestCase
         $form1->add($childForm1);
         $this->dataExtractor
              ->method('extractConfiguration')
-             ->will($this->returnValue(array()));
+             ->will($this->returnValue([]));
         $this->dataExtractor
              ->method('extractDefaultData')
-             ->will($this->returnValue(array()));
+             ->will($this->returnValue([]));
         $this->dataExtractor->expects($this->at(4))
             ->method('extractSubmittedData')
             ->with($form1)
-            ->will($this->returnValue(array('errors' => array('foo'))));
+            ->will($this->returnValue(['errors' => ['foo']]));
         $this->dataExtractor->expects($this->at(5))
             ->method('extractSubmittedData')
             ->with($childForm1)
-            ->will($this->returnValue(array('errors' => array('bar', 'bam'))));
+            ->will($this->returnValue(['errors' => ['bar', 'bam']]));
         $this->dataExtractor->expects($this->at(8))
             ->method('extractSubmittedData')
             ->with($form2)
-            ->will($this->returnValue(array('errors' => array('baz'))));
+            ->will($this->returnValue(['errors' => ['baz']]));
 
         $this->dataCollector->collectSubmittedData($form1);
 
@@ -653,30 +653,30 @@ class FormDataCollectorTest extends TestCase
 
         $this->dataExtractor
             ->method('extractConfiguration')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
         $this->dataExtractor
             ->method('extractDefaultData')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
         $this->dataExtractor->expects($this->at(10))
             ->method('extractSubmittedData')
             ->with($this->form)
-            ->will($this->returnValue(array('errors' => array())));
+            ->will($this->returnValue(['errors' => []]));
         $this->dataExtractor->expects($this->at(11))
             ->method('extractSubmittedData')
             ->with($child1Form)
-            ->will($this->returnValue(array('errors' => array())));
+            ->will($this->returnValue(['errors' => []]));
         $this->dataExtractor->expects($this->at(12))
             ->method('extractSubmittedData')
             ->with($child11Form)
-            ->will($this->returnValue(array('errors' => array('foo'))));
+            ->will($this->returnValue(['errors' => ['foo']]));
         $this->dataExtractor->expects($this->at(13))
             ->method('extractSubmittedData')
             ->with($child2Form)
-            ->will($this->returnValue(array('errors' => array())));
+            ->will($this->returnValue(['errors' => []]));
         $this->dataExtractor->expects($this->at(14))
             ->method('extractSubmittedData')
             ->with($child21Form)
-            ->will($this->returnValue(array('errors' => array())));
+            ->will($this->returnValue(['errors' => []]));
 
         $this->dataCollector->collectSubmittedData($this->form);
         $this->dataCollector->buildPreliminaryFormTree($this->form);
@@ -701,14 +701,14 @@ class FormDataCollectorTest extends TestCase
 
         $this->dataExtractor->expects($this->any())
             ->method('extractConfiguration')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
         $this->dataExtractor->expects($this->any())
             ->method('extractDefaultData')
-            ->will($this->returnValue(array()));
+            ->will($this->returnValue([]));
         $this->dataExtractor->expects($this->any())
             ->method('extractSubmittedData')
             ->with($form)
-            ->will($this->returnValue(array('errors' => array('baz'))));
+            ->will($this->returnValue(['errors' => ['baz']]));
 
         $this->dataCollector->buildPreliminaryFormTree($form);
         $this->dataCollector->collectSubmittedData($form);
@@ -716,11 +716,11 @@ class FormDataCollectorTest extends TestCase
         $this->dataCollector->reset();
 
         $this->assertSame(
-            array(
-                'forms' => array(),
-                'forms_by_hash' => array(),
+            [
+                'forms' => [],
+                'forms_by_hash' => [],
                 'nb_errors' => 0,
-            ),
+            ],
             $this->dataCollector->getData()
         );
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
index 0693b28c13..8e66a9801e 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/FormDataExtractorTest.php
@@ -62,14 +62,14 @@ class FormDataExtractorTest extends TestCase
             ->setType($type)
             ->getForm();
 
-        $this->assertSame(array(
+        $this->assertSame([
             'id' => 'name',
             'name' => 'name',
             'type_class' => 'stdClass',
             'synchronized' => true,
-            'passed_options' => array(),
-            'resolved_options' => array(),
-        ), $this->dataExtractor->extractConfiguration($form));
+            'passed_options' => [],
+            'resolved_options' => [],
+        ], $this->dataExtractor->extractConfiguration($form));
     }
 
     public function testExtractConfigurationSortsPassedOptions()
@@ -79,11 +79,11 @@ class FormDataExtractorTest extends TestCase
             ->method('getInnerType')
             ->will($this->returnValue(new \stdClass()));
 
-        $options = array(
+        $options = [
             'b' => 'foo',
             'a' => 'bar',
             'c' => 'baz',
-        );
+        ];
 
         $form = $this->createBuilder('name')
             ->setType($type)
@@ -92,18 +92,18 @@ class FormDataExtractorTest extends TestCase
             ->setAttribute('data_collector/passed_options', $options)
             ->getForm();
 
-        $this->assertSame(array(
+        $this->assertSame([
             'id' => 'name',
             'name' => 'name',
             'type_class' => 'stdClass',
             'synchronized' => true,
-            'passed_options' => array(
+            'passed_options' => [
                 'a' => 'bar',
                 'b' => 'foo',
                 'c' => 'baz',
-            ),
-            'resolved_options' => array(),
-        ), $this->dataExtractor->extractConfiguration($form));
+            ],
+            'resolved_options' => [],
+        ], $this->dataExtractor->extractConfiguration($form));
     }
 
     public function testExtractConfigurationSortsResolvedOptions()
@@ -113,28 +113,28 @@ class FormDataExtractorTest extends TestCase
             ->method('getInnerType')
             ->will($this->returnValue(new \stdClass()));
 
-        $options = array(
+        $options = [
             'b' => 'foo',
             'a' => 'bar',
             'c' => 'baz',
-        );
+        ];
 
         $form = $this->createBuilder('name', $options)
             ->setType($type)
             ->getForm();
 
-        $this->assertSame(array(
+        $this->assertSame([
             'id' => 'name',
             'name' => 'name',
             'type_class' => 'stdClass',
             'synchronized' => true,
-            'passed_options' => array(),
-            'resolved_options' => array(
+            'passed_options' => [],
+            'resolved_options' => [
                 'a' => 'bar',
                 'b' => 'foo',
                 'c' => 'baz',
-            ),
-        ), $this->dataExtractor->extractConfiguration($form));
+            ],
+        ], $this->dataExtractor->extractConfiguration($form));
     }
 
     public function testExtractConfigurationBuildsIdRecursively()
@@ -159,14 +159,14 @@ class FormDataExtractorTest extends TestCase
         $grandParent->add($parent);
         $parent->add($form);
 
-        $this->assertSame(array(
+        $this->assertSame([
             'id' => 'grandParent_parent_name',
             'name' => 'name',
             'type_class' => 'stdClass',
             'synchronized' => true,
-            'passed_options' => array(),
-            'resolved_options' => array(),
-        ), $this->dataExtractor->extractConfiguration($form));
+            'passed_options' => [],
+            'resolved_options' => [],
+        ], $this->dataExtractor->extractConfiguration($form));
     }
 
     public function testExtractDefaultData()
@@ -175,50 +175,50 @@ class FormDataExtractorTest extends TestCase
 
         $form->setData('Foobar');
 
-        $this->assertSame(array(
-            'default_data' => array(
+        $this->assertSame([
+            'default_data' => [
                 'norm' => 'Foobar',
-            ),
-            'submitted_data' => array(),
-        ), $this->dataExtractor->extractDefaultData($form));
+            ],
+            'submitted_data' => [],
+        ], $this->dataExtractor->extractDefaultData($form));
     }
 
     public function testExtractDefaultDataStoresModelDataIfDifferent()
     {
         $form = $this->createBuilder('name')
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 'Foo' => 'Bar',
-            )))
+            ]))
             ->getForm();
 
         $form->setData('Foo');
 
-        $this->assertSame(array(
-            'default_data' => array(
+        $this->assertSame([
+            'default_data' => [
                 'norm' => 'Bar',
                 'model' => 'Foo',
-            ),
-            'submitted_data' => array(),
-        ), $this->dataExtractor->extractDefaultData($form));
+            ],
+            'submitted_data' => [],
+        ], $this->dataExtractor->extractDefaultData($form));
     }
 
     public function testExtractDefaultDataStoresViewDataIfDifferent()
     {
         $form = $this->createBuilder('name')
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 'Foo' => 'Bar',
-            )))
+            ]))
             ->getForm();
 
         $form->setData('Foo');
 
-        $this->assertSame(array(
-            'default_data' => array(
+        $this->assertSame([
+            'default_data' => [
                 'norm' => 'Foo',
                 'view' => 'Bar',
-            ),
-            'submitted_data' => array(),
-        ), $this->dataExtractor->extractDefaultData($form));
+            ],
+            'submitted_data' => [],
+        ], $this->dataExtractor->extractDefaultData($form));
     }
 
     public function testExtractSubmittedData()
@@ -227,55 +227,55 @@ class FormDataExtractorTest extends TestCase
 
         $form->submit('Foobar');
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Foobar',
-            ),
-            'errors' => array(),
+            ],
+            'errors' => [],
             'synchronized' => true,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractSubmittedDataStoresModelDataIfDifferent()
     {
         $form = $this->createBuilder('name')
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 'Foo' => 'Bar',
                 '' => '',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('Bar');
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Bar',
                 'model' => 'Foo',
-            ),
-            'errors' => array(),
+            ],
+            'errors' => [],
             'synchronized' => true,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractSubmittedDataStoresViewDataIfDifferent()
     {
         $form = $this->createBuilder('name')
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 'Foo' => 'Bar',
                 '' => '',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('Bar');
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Foo',
                 'view' => 'Bar',
-            ),
-            'errors' => array(),
+            ],
+            'errors' => [],
             'synchronized' => true,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractSubmittedDataStoresErrors()
@@ -285,15 +285,15 @@ class FormDataExtractorTest extends TestCase
         $form->submit('Foobar');
         $form->addError(new FormError('Invalid!'));
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Foobar',
-            ),
-            'errors' => array(
-                array('message' => 'Invalid!', 'origin' => spl_object_hash($form), 'trace' => array()),
-            ),
+            ],
+            'errors' => [
+                ['message' => 'Invalid!', 'origin' => spl_object_hash($form), 'trace' => []],
+            ],
             'synchronized' => true,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractSubmittedDataStoresErrorOrigin()
@@ -306,15 +306,15 @@ class FormDataExtractorTest extends TestCase
         $form->submit('Foobar');
         $form->addError($error);
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Foobar',
-            ),
-            'errors' => array(
-                array('message' => 'Invalid!', 'origin' => spl_object_hash($form), 'trace' => array()),
-            ),
+            ],
+            'errors' => [
+                ['message' => 'Invalid!', 'origin' => spl_object_hash($form), 'trace' => []],
+            ],
             'synchronized' => true,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractSubmittedDataStoresErrorCause()
@@ -322,10 +322,10 @@ class FormDataExtractorTest extends TestCase
         $form = $this->createBuilder('name')->getForm();
 
         $exception = new \Exception();
-        $violation = new ConstraintViolation('Foo', 'Foo', array(), 'Root', 'property.path', 'Invalid!', null, null, null, $exception);
+        $violation = new ConstraintViolation('Foo', 'Foo', [], 'Root', 'property.path', 'Invalid!', null, null, null, $exception);
 
         $form->submit('Foobar');
-        $form->addError(new FormError('Invalid!', null, array(), null, $violation));
+        $form->addError(new FormError('Invalid!', null, [], null, $violation));
         $origin = spl_object_hash($form);
 
         $this->assertDumpMatchesFormat(<<<EODUMP
@@ -375,42 +375,42 @@ EODUMP
 
         $form->submit('Foobar');
 
-        $this->assertSame(array(
-            'submitted_data' => array(
+        $this->assertSame([
+            'submitted_data' => [
                 'norm' => 'Foobar',
                 'model' => null,
-            ),
-            'errors' => array(),
+            ],
+            'errors' => [],
             'synchronized' => false,
-        ), $this->dataExtractor->extractSubmittedData($form));
+        ], $this->dataExtractor->extractSubmittedData($form));
     }
 
     public function testExtractViewVariables()
     {
         $view = new FormView();
 
-        $view->vars = array(
+        $view->vars = [
             'b' => 'foo',
             'a' => 'bar',
             'c' => 'baz',
             'id' => 'foo_bar',
             'name' => 'bar',
-        );
+        ];
 
-        $this->assertSame(array(
+        $this->assertSame([
             'id' => 'foo_bar',
             'name' => 'bar',
-            'view_vars' => array(
+            'view_vars' => [
                 'a' => 'bar',
                 'b' => 'foo',
                 'c' => 'baz',
                 'id' => 'foo_bar',
                 'name' => 'bar',
-            ),
-        ), $this->dataExtractor->extractViewVariables($view));
+            ],
+        ], $this->dataExtractor->extractViewVariables($view));
     }
 
-    private function createBuilder(string $name, array $options = array()): FormBuilder
+    private function createBuilder(string $name, array $options = []): FormBuilder
     {
         return new FormBuilder($name, null, $this->dispatcher, $this->factory, $options);
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
index 88561b3bb5..235188365d 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DataCollector/Type/DataCollectorTypeExtensionTest.php
@@ -47,6 +47,6 @@ class DataCollectorTypeExtensionTest extends TestCase
             ->method('addEventSubscriber')
             ->with($this->isInstanceOf('Symfony\Component\Form\Extension\DataCollector\EventListener\DataCollectorListener'));
 
-        $this->extension->buildForm($builder, array());
+        $this->extension->buildForm($builder, []);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
index 9d8020b078..0498c764d1 100644
--- a/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/DependencyInjection/DependencyInjectionExtensionTest.php
@@ -29,18 +29,18 @@ class DependencyInjectionExtensionTest extends TestCase
         $typeExtension3 = new OtherTypeExtension();
         $typeExtension4 = new MultipleTypesTypeExtension();
 
-        $extensions = array(
-            'test' => new \ArrayIterator(array($typeExtension1, $typeExtension2, $typeExtension4)),
-            'other' => new \ArrayIterator(array($typeExtension3, $typeExtension4)),
-        );
+        $extensions = [
+            'test' => new \ArrayIterator([$typeExtension1, $typeExtension2, $typeExtension4]),
+            'other' => new \ArrayIterator([$typeExtension3, $typeExtension4]),
+        ];
 
-        $extension = new DependencyInjectionExtension($container, $extensions, array());
+        $extension = new DependencyInjectionExtension($container, $extensions, []);
 
         $this->assertTrue($extension->hasTypeExtensions('test'));
         $this->assertTrue($extension->hasTypeExtensions('other'));
         $this->assertFalse($extension->hasTypeExtensions('unknown'));
-        $this->assertSame(array($typeExtension1, $typeExtension2, $typeExtension4), $extension->getTypeExtensions('test'));
-        $this->assertSame(array($typeExtension3, $typeExtension4), $extension->getTypeExtensions('other'));
+        $this->assertSame([$typeExtension1, $typeExtension2, $typeExtension4], $extension->getTypeExtensions('test'));
+        $this->assertSame([$typeExtension3, $typeExtension4], $extension->getTypeExtensions('other'));
     }
 
     /**
@@ -51,11 +51,11 @@ class DependencyInjectionExtensionTest extends TestCase
         $container = $this->getMockBuilder('Psr\Container\ContainerInterface')->getMock();
         $container->expects($this->never())->method('get');
 
-        $extensions = array(
-            'unmatched' => new \ArrayIterator(array(new TestTypeExtension())),
-        );
+        $extensions = [
+            'unmatched' => new \ArrayIterator([new TestTypeExtension()]),
+        ];
 
-        $extension = new DependencyInjectionExtension($container, $extensions, array());
+        $extension = new DependencyInjectionExtension($container, $extensions, []);
 
         $extension->getTypeExtensions('unmatched');
     }
@@ -63,7 +63,7 @@ class DependencyInjectionExtensionTest extends TestCase
     public function testGetTypeGuesser()
     {
         $container = $this->createContainerMock();
-        $extension = new DependencyInjectionExtension($container, array(), array($this->getMockBuilder(FormTypeGuesserInterface::class)->getMock()));
+        $extension = new DependencyInjectionExtension($container, [], [$this->getMockBuilder(FormTypeGuesserInterface::class)->getMock()]);
 
         $this->assertInstanceOf(FormTypeGuesserChain::class, $extension->getTypeGuesser());
     }
@@ -71,7 +71,7 @@ class DependencyInjectionExtensionTest extends TestCase
     public function testGetTypeGuesserReturnsNullWhenNoTypeGuessersHaveBeenConfigured()
     {
         $container = $this->createContainerMock();
-        $extension = new DependencyInjectionExtension($container, array(), array());
+        $extension = new DependencyInjectionExtension($container, [], []);
 
         $this->assertNull($extension->getTypeGuesser());
     }
@@ -79,7 +79,7 @@ class DependencyInjectionExtensionTest extends TestCase
     private function createContainerMock()
     {
         return $this->getMockBuilder('Psr\Container\ContainerInterface')
-            ->setMethods(array('get', 'has'))
+            ->setMethods(['get', 'has'])
             ->getMock();
     }
 }
@@ -88,7 +88,7 @@ class TestTypeExtension extends AbstractTypeExtension
 {
     public static function getExtendedTypes(): iterable
     {
-        return array('test');
+        return ['test'];
     }
 }
 
@@ -96,7 +96,7 @@ class OtherTypeExtension extends AbstractTypeExtension
 {
     public static function getExtendedTypes(): iterable
     {
-        return array('other');
+        return ['other'];
     }
 }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/HttpFoundationRequestHandlerTest.php b/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/HttpFoundationRequestHandlerTest.php
index e694e40579..f414a511b0 100644
--- a/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/HttpFoundationRequestHandlerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/HttpFoundation/HttpFoundationRequestHandlerTest.php
@@ -37,9 +37,9 @@ class HttpFoundationRequestHandlerTest extends AbstractRequestHandlerTest
         $this->requestHandler->handleRequest($this->getMockForm('name', 'GET'), new \stdClass());
     }
 
-    protected function setRequestData($method, $data, $files = array())
+    protected function setRequestData($method, $data, $files = [])
     {
-        $this->request = Request::create('http://localhost', $method, $data, array(), $files);
+        $this->request = Request::create('http://localhost', $method, $data, [], $files);
     }
 
     protected function getRequestHandler()
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorPerformanceTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorPerformanceTest.php
index 9e957d55fe..64b49d7e9f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorPerformanceTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorPerformanceTest.php
@@ -22,9 +22,9 @@ class FormValidatorPerformanceTest extends FormPerformanceTestCase
 {
     protected function getExtensions()
     {
-        return array(
+        return [
             new ValidatorExtension(Validation::createValidator()),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php
index 7decfd0604..7910dd0b55 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Constraints/FormValidatorTest.php
@@ -48,7 +48,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $this->dispatcher = $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
         $this->factory = $this->getMockBuilder('Symfony\Component\Form\FormFactoryInterface')->getMock();
-        $this->serverParams = $this->getMockBuilder('Symfony\Component\Form\Extension\Validator\Util\ServerParams')->setMethods(array('getNormalizedIniPostMaxSize', 'getContentLength'))->getMock();
+        $this->serverParams = $this->getMockBuilder('Symfony\Component\Form\Extension\Validator\Util\ServerParams')->setMethods(['getNormalizedIniPostMaxSize', 'getContentLength'])->getMock();
 
         parent::setUp();
 
@@ -63,12 +63,12 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testValidate()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $options = array('validation_groups' => array('group1', 'group2'));
+        $options = ['validation_groups' => ['group1', 'group2']];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -78,19 +78,19 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testValidateConstraints()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $constraint1 = new NotNull(array('groups' => array('group1', 'group2')));
-        $constraint2 = new NotBlank(array('groups' => 'group2'));
+        $constraint1 = new NotNull(['groups' => ['group1', 'group2']]);
+        $constraint2 = new NotBlank(['groups' => 'group2']);
 
-        $options = array(
-            'validation_groups' => array('group1', 'group2'),
-            'constraints' => array($constraint1, $constraint2),
-        );
+        $options = [
+            'validation_groups' => ['group1', 'group2'],
+            'constraints' => [$constraint1, $constraint2],
+        ];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
         // First default constraints
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         // Then custom constraints
         $this->expectValidateValueAt(1, 'data', $object, $constraint1, 'group1');
@@ -109,16 +109,16 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $options = array(
-            'validation_groups' => array('group1', 'group2'),
-            'constraints' => array(new Valid()),
-        );
+        $options = [
+            'validation_groups' => ['group1', 'group2'],
+            'constraints' => [new Valid()],
+        ];
         $form = $this->getBuilder('name', '\stdClass', $options)->getForm();
         $parent->add($form);
 
         $form->setData($object);
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -133,7 +133,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $options = array('validation_groups' => array('group1', 'group2'));
+        $options = ['validation_groups' => ['group1', 'group2']];
         $form = $this->getBuilder('name', '\stdClass', $options)->getForm();
         $parent->add($form);
 
@@ -152,7 +152,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
         $form = new FormBuilder('name', '\stdClass', $this->dispatcher, $this->factory);
         $form = $form->setData($object)->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('Default'));
+        $this->expectValidateAt(0, 'data', $object, ['Default']);
 
         $this->validator->validate($form, new Form());
 
@@ -162,17 +162,17 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testValidateConstraintsOptionEvenIfNoValidConstraint()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $constraint1 = new NotNull(array('groups' => array('group1', 'group2')));
-        $constraint2 = new NotBlank(array('groups' => 'group2'));
+        $constraint1 = new NotNull(['groups' => ['group1', 'group2']]);
+        $constraint2 = new NotBlank(['groups' => 'group2']);
 
         $parent = $this->getBuilder('parent', null)
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $options = array(
-            'validation_groups' => array('group1', 'group2'),
-            'constraints' => array($constraint1, $constraint2),
-        );
+        $options = [
+            'validation_groups' => ['group1', 'group2'],
+            'constraints' => [$constraint1, $constraint2],
+        ];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
@@ -190,9 +190,9 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $form = $this->getBuilder('name', '\stdClass', array(
-                'validation_groups' => array(),
-            ))
+        $form = $this->getBuilder('name', '\stdClass', [
+                'validation_groups' => [],
+            ])
             ->setData($object)
             ->getForm();
 
@@ -211,10 +211,10 @@ class FormValidatorTest extends ConstraintValidatorTestCase
         $constraint1 = $this->getMockBuilder('Symfony\Component\Validator\Constraint')->getMock();
         $constraint2 = $this->getMockBuilder('Symfony\Component\Validator\Constraint')->getMock();
 
-        $options = array(
-            'validation_groups' => array(),
-            'constraints' => array($constraint1, $constraint2),
-        );
+        $options = [
+            'validation_groups' => [],
+            'constraints' => [$constraint1, $constraint2],
+        ];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
@@ -233,13 +233,13 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $form = $this->getBuilder('name', '\stdClass', array(
+        $form = $this->getBuilder('name', '\stdClass', [
                 'invalid_message' => 'invalid_message_key',
                 // Invalid message parameters must be supported, because the
                 // invalid message can be a translation key
                 // see https://github.com/symfony/symfony/issues/5144
-                'invalid_message_parameters' => array('{{ foo }}' => 'bar'),
-            ))
+                'invalid_message_parameters' => ['{{ foo }}' => 'bar'],
+            ])
             ->setData($object)
             ->addViewTransformer(new CallbackTransformer(
                 function ($data) { return $data; },
@@ -267,14 +267,14 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $form = $this->getBuilder('name', '\stdClass', array(
+        $form = $this->getBuilder('name', '\stdClass', [
                 'invalid_message' => 'invalid_message_key',
                 // Invalid message parameters must be supported, because the
                 // invalid message can be a translation key
                 // see https://github.com/symfony/symfony/issues/5144
-                'invalid_message_parameters' => array('{{ foo }}' => 'bar'),
-                'validation_groups' => array(),
-            ))
+                'invalid_message_parameters' => ['{{ foo }}' => 'bar'],
+                'validation_groups' => [],
+            ])
             ->setData($object)
             ->addViewTransformer(new CallbackTransformer(
                     function ($data) { return $data; },
@@ -304,11 +304,11 @@ class FormValidatorTest extends ConstraintValidatorTestCase
         $constraint1 = $this->getMockBuilder('Symfony\Component\Validator\Constraint')->getMock();
         $constraint2 = $this->getMockBuilder('Symfony\Component\Validator\Constraint')->getMock();
 
-        $options = array(
+        $options = [
             'invalid_message' => 'invalid_message_key',
-            'validation_groups' => array('group1', 'group2'),
-            'constraints' => array($constraint1, $constraint2),
-        );
+            'validation_groups' => ['group1', 'group2'],
+            'constraints' => [$constraint1, $constraint2],
+        ];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->addViewTransformer(new CallbackTransformer(
@@ -354,7 +354,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->getForm();
 
         // Launch transformer
-        $form->submit(array('child' => 'foo'));
+        $form->submit(['child' => 'foo']);
 
         $this->expectNoValidate();
 
@@ -366,13 +366,13 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testHandleGroupSequenceValidationGroups()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $options = array('validation_groups' => new GroupSequence(array('group1', 'group2')));
+        $options = ['validation_groups' => new GroupSequence(['group1', 'group2'])];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, new GroupSequence(array('group1', 'group2')));
-        $this->expectValidateAt(1, 'data', $object, new GroupSequence(array('group1', 'group2')));
+        $this->expectValidateAt(0, 'data', $object, new GroupSequence(['group1', 'group2']));
+        $this->expectValidateAt(1, 'data', $object, new GroupSequence(['group1', 'group2']));
 
         $this->validator->validate($form, new Form());
 
@@ -382,12 +382,12 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testHandleCallbackValidationGroups()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $options = array('validation_groups' => array($this, 'getValidationGroups'));
+        $options = ['validation_groups' => [$this, 'getValidationGroups']];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -397,12 +397,12 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testDontExecuteFunctionNames()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $options = array('validation_groups' => 'header');
+        $options = ['validation_groups' => 'header'];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('header'));
+        $this->expectValidateAt(0, 'data', $object, ['header']);
 
         $this->validator->validate($form, new Form());
 
@@ -412,14 +412,14 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     public function testHandleClosureValidationGroups()
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
-        $options = array('validation_groups' => function (FormInterface $form) {
-            return array('group1', 'group2');
-        });
+        $options = ['validation_groups' => function (FormInterface $form) {
+            return ['group1', 'group2'];
+        }];
         $form = $this->getBuilder('name', '\stdClass', $options)
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -434,19 +434,19 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $form = $this->getForm('name', '\stdClass', array(
+        $form = $this->getForm('name', '\stdClass', [
             'validation_groups' => 'form_group',
-            'constraints' => array(new Valid()),
-        ));
+            'constraints' => [new Valid()],
+        ]);
 
         $parent->add($form);
-        $parent->add($this->getSubmitButton('submit', array(
+        $parent->add($this->getSubmitButton('submit', [
             'validation_groups' => 'button_group',
-        )));
+        ]));
 
-        $parent->submit(array('name' => $object, 'submit' => ''));
+        $parent->submit(['name' => $object, 'submit' => '']);
 
-        $this->expectValidateAt(0, 'data', $object, array('button_group'));
+        $this->expectValidateAt(0, 'data', $object, ['button_group']);
 
         $this->validator->validate($form, new Form());
 
@@ -461,19 +461,19 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $form = $this->getForm('name', '\stdClass', array(
+        $form = $this->getForm('name', '\stdClass', [
             'validation_groups' => 'form_group',
-            'constraints' => array(new Valid()),
-        ));
+            'constraints' => [new Valid()],
+        ]);
 
         $parent->add($form);
-        $parent->add($this->getSubmitButton('submit', array(
+        $parent->add($this->getSubmitButton('submit', [
             'validation_groups' => 'button_group',
-        )));
+        ]));
 
         $form->setData($object);
 
-        $this->expectValidateAt(0, 'data', $object, array('form_group'));
+        $this->expectValidateAt(0, 'data', $object, ['form_group']);
 
         $this->validator->validate($form, new Form());
 
@@ -484,18 +484,18 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $parentOptions = array('validation_groups' => 'group');
+        $parentOptions = ['validation_groups' => 'group'];
         $parent = $this->getBuilder('parent', null, $parentOptions)
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $formOptions = array('constraints' => array(new Valid()));
+        $formOptions = ['constraints' => [new Valid()]];
         $form = $this->getBuilder('name', '\stdClass', $formOptions)->getForm();
         $parent->add($form);
 
         $form->setData($object);
 
-        $this->expectValidateAt(0, 'data', $object, array('group'));
+        $this->expectValidateAt(0, 'data', $object, ['group']);
 
         $this->validator->validate($form, new Form());
 
@@ -506,18 +506,18 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $parentOptions = array('validation_groups' => array($this, 'getValidationGroups'));
+        $parentOptions = ['validation_groups' => [$this, 'getValidationGroups']];
         $parent = $this->getBuilder('parent', null, $parentOptions)
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $formOptions = array('constraints' => array(new Valid()));
+        $formOptions = ['constraints' => [new Valid()]];
         $form = $this->getBuilder('name', '\stdClass', $formOptions)->getForm();
         $parent->add($form);
 
         $form->setData($object);
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -528,22 +528,22 @@ class FormValidatorTest extends ConstraintValidatorTestCase
     {
         $object = $this->getMockBuilder('\stdClass')->getMock();
 
-        $parentOptions = array(
+        $parentOptions = [
             'validation_groups' => function (FormInterface $form) {
-                return array('group1', 'group2');
+                return ['group1', 'group2'];
             },
-        );
+        ];
         $parent = $this->getBuilder('parent', null, $parentOptions)
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->getForm();
-        $formOptions = array('constraints' => array(new Valid()));
+        $formOptions = ['constraints' => [new Valid()]];
         $form = $this->getBuilder('name', '\stdClass', $formOptions)->getForm();
         $parent->add($form);
 
         $form->setData($object);
 
-        $this->expectValidateAt(0, 'data', $object, array('group1', 'group2'));
+        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);
 
         $this->validator->validate($form, new Form());
 
@@ -557,7 +557,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
             ->setData($object)
             ->getForm();
 
-        $this->expectValidateAt(0, 'data', $object, array('Default'));
+        $this->expectValidateAt(0, 'data', $object, ['Default']);
 
         $this->validator->validate($form, new Form());
 
@@ -579,13 +579,13 @@ class FormValidatorTest extends ConstraintValidatorTestCase
 
     public function testViolationIfExtraData()
     {
-        $form = $this->getBuilder('parent', null, array('extra_fields_message' => 'Extra!'))
+        $form = $this->getBuilder('parent', null, ['extra_fields_message' => 'Extra!'])
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->add($this->getBuilder('child'))
             ->getForm();
 
-        $form->submit(array('foo' => 'bar'));
+        $form->submit(['foo' => 'bar']);
 
         $this->expectNoValidate();
 
@@ -593,20 +593,20 @@ class FormValidatorTest extends ConstraintValidatorTestCase
 
         $this->buildViolation('Extra!')
             ->setParameter('{{ extra_fields }}', '"foo"')
-            ->setInvalidValue(array('foo' => 'bar'))
+            ->setInvalidValue(['foo' => 'bar'])
             ->setCode(Form::NO_SUCH_FIELD_ERROR)
             ->assertRaised();
     }
 
     public function testViolationFormatIfMultipleExtraFields()
     {
-        $form = $this->getBuilder('parent', null, array('extra_fields_message' => 'Extra!'))
+        $form = $this->getBuilder('parent', null, ['extra_fields_message' => 'Extra!'])
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->add($this->getBuilder('child'))
             ->getForm();
 
-        $form->submit(array('foo' => 'bar', 'baz' => 'qux', 'quux' => 'quuz'));
+        $form->submit(['foo' => 'bar', 'baz' => 'qux', 'quux' => 'quuz']);
 
         $this->expectNoValidate();
 
@@ -614,7 +614,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
 
         $this->buildViolation('Extra!')
             ->setParameter('{{ extra_fields }}', '"foo", "baz", "quux"')
-            ->setInvalidValue(array('foo' => 'bar', 'baz' => 'qux', 'quux' => 'quuz'))
+            ->setInvalidValue(['foo' => 'bar', 'baz' => 'qux', 'quux' => 'quuz'])
             ->setCode(Form::NO_SUCH_FIELD_ERROR)
             ->assertRaised();
     }
@@ -624,13 +624,13 @@ class FormValidatorTest extends ConstraintValidatorTestCase
         $context = $this->getMockExecutionContext();
 
         $form = $this
-            ->getBuilder('parent', null, array('allow_extra_fields' => true))
+            ->getBuilder('parent', null, ['allow_extra_fields' => true])
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->add($this->getBuilder('child'))
             ->getForm();
 
-        $form->submit(array('foo' => 'bar'));
+        $form->submit(['foo' => 'bar']);
 
         $context->expects($this->never())
             ->method('addViolation');
@@ -646,7 +646,7 @@ class FormValidatorTest extends ConstraintValidatorTestCase
      */
     public function getValidationGroups(FormInterface $form)
     {
-        return array('group1', 'group2');
+        return ['group1', 'group2'];
     }
 
     private function getMockExecutionContext()
@@ -667,22 +667,22 @@ class FormValidatorTest extends ConstraintValidatorTestCase
         return $context;
     }
 
-    private function getBuilder(string $name = 'name', string $dataClass = null, array $options = array()): FormBuilder
+    private function getBuilder(string $name = 'name', string $dataClass = null, array $options = []): FormBuilder
     {
-        $options = array_replace(array(
-            'constraints' => array(),
-            'invalid_message_parameters' => array(),
-        ), $options);
+        $options = array_replace([
+            'constraints' => [],
+            'invalid_message_parameters' => [],
+        ], $options);
 
         return new FormBuilder($name, $dataClass, $this->dispatcher, $this->factory, $options);
     }
 
-    private function getForm($name = 'name', $dataClass = null, array $options = array())
+    private function getForm($name = 'name', $dataClass = null, array $options = [])
     {
         return $this->getBuilder($name, $dataClass, $options)->getForm();
     }
 
-    private function getSubmitButton($name = 'name', array $options = array())
+    private function getSubmitButton($name = 'name', array $options = [])
     {
         $builder = new SubmitButtonBuilder($name, $options);
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
index ae161819c7..5cda7eeaf7 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/EventListener/ValidationListenerTest.php
@@ -62,7 +62,7 @@ class ValidationListenerTest extends TestCase
         $this->listener = new ValidationListener($this->validator, $this->violationMapper);
         $this->message = 'Message';
         $this->messageTemplate = 'Message template';
-        $this->params = array('foo' => 'bar');
+        $this->params = ['foo' => 'bar'];
     }
 
     private function getConstraintViolation($code = null)
@@ -74,7 +74,7 @@ class ValidationListenerTest extends TestCase
     {
         $builder = new FormBuilder($name, $dataClass, $this->dispatcher, $this->factory);
         $builder->setPropertyPath(new PropertyPath($propertyPath ?: $name));
-        $builder->setAttribute('error_mapping', array());
+        $builder->setAttribute('error_mapping', []);
         $builder->setErrorBubbling(false);
         $builder->setMapped(true);
 
@@ -99,7 +99,7 @@ class ValidationListenerTest extends TestCase
 
         $this->validator->expects($this->once())
             ->method('validate')
-            ->will($this->returnValue(array($violation)));
+            ->will($this->returnValue([$violation]));
 
         $this->violationMapper->expects($this->once())
             ->method('mapViolation')
@@ -115,7 +115,7 @@ class ValidationListenerTest extends TestCase
 
         $this->validator->expects($this->once())
             ->method('validate')
-            ->will($this->returnValue(array($violation)));
+            ->will($this->returnValue([$violation]));
 
         $this->violationMapper->expects($this->once())
             ->method('mapViolation')
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/BaseValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/BaseValidatorExtensionTest.php
index e83aaaa349..b90098b412 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/BaseValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/BaseValidatorExtensionTest.php
@@ -29,57 +29,57 @@ abstract class BaseValidatorExtensionTest extends TypeTestCase
 
     public function testValidationGroupsTransformedToArray()
     {
-        $form = $this->createForm(array(
+        $form = $this->createForm([
             'validation_groups' => 'group',
-        ));
+        ]);
 
-        $this->assertEquals(array('group'), $form->getConfig()->getOption('validation_groups'));
+        $this->assertEquals(['group'], $form->getConfig()->getOption('validation_groups'));
     }
 
     public function testValidationGroupsCanBeSetToArray()
     {
-        $form = $this->createForm(array(
-            'validation_groups' => array('group1', 'group2'),
-        ));
+        $form = $this->createForm([
+            'validation_groups' => ['group1', 'group2'],
+        ]);
 
-        $this->assertEquals(array('group1', 'group2'), $form->getConfig()->getOption('validation_groups'));
+        $this->assertEquals(['group1', 'group2'], $form->getConfig()->getOption('validation_groups'));
     }
 
     public function testValidationGroupsCanBeSetToFalse()
     {
-        $form = $this->createForm(array(
+        $form = $this->createForm([
             'validation_groups' => false,
-        ));
+        ]);
 
-        $this->assertEquals(array(), $form->getConfig()->getOption('validation_groups'));
+        $this->assertEquals([], $form->getConfig()->getOption('validation_groups'));
     }
 
     public function testValidationGroupsCanBeSetToCallback()
     {
-        $form = $this->createForm(array(
-            'validation_groups' => array($this, 'testValidationGroupsCanBeSetToCallback'),
-        ));
+        $form = $this->createForm([
+            'validation_groups' => [$this, 'testValidationGroupsCanBeSetToCallback'],
+        ]);
 
         $this->assertInternalType('callable', $form->getConfig()->getOption('validation_groups'));
     }
 
     public function testValidationGroupsCanBeSetToClosure()
     {
-        $form = $this->createForm(array(
+        $form = $this->createForm([
             'validation_groups' => function (FormInterface $form) { },
-        ));
+        ]);
 
         $this->assertInternalType('callable', $form->getConfig()->getOption('validation_groups'));
     }
 
     public function testValidationGroupsCanBeSetToGroupSequence()
     {
-        $form = $this->createForm(array(
-            'validation_groups' => new GroupSequence(array('group1', 'group2')),
-        ));
+        $form = $this->createForm([
+            'validation_groups' => new GroupSequence(['group1', 'group2']),
+        ]);
 
         $this->assertInstanceOf('Symfony\Component\Validator\Constraints\GroupSequence', $form->getConfig()->getOption('validation_groups'));
     }
 
-    abstract protected function createForm(array $options = array());
+    abstract protected function createForm(array $options = []);
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/FormTypeValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/FormTypeValidatorExtensionTest.php
index 449a133e44..8437d6f097 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/FormTypeValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/FormTypeValidatorExtensionTest.php
@@ -33,9 +33,9 @@ class FormTypeValidatorExtensionTest extends BaseValidatorExtensionTest
         $builder = $this->factory->createBuilder(
             FormTypeTest::TESTED_TYPE,
             null,
-            array(
+            [
                 'validation_groups' => 'group',
-            )
+            ]
         );
         $builder->add('firstName', FormTypeTest::TESTED_TYPE);
         $form = $builder->getForm();
@@ -46,14 +46,14 @@ class FormTypeValidatorExtensionTest extends BaseValidatorExtensionTest
             ->will($this->returnValue(new ConstraintViolationList()));
 
         // specific data is irrelevant
-        $form->submit(array());
+        $form->submit([]);
     }
 
     public function testValidConstraint()
     {
-        $form = $this->createForm(array('constraints' => $valid = new Valid()));
+        $form = $this->createForm(['constraints' => $valid = new Valid()]);
 
-        $this->assertSame(array($valid), $form->getConfig()->getOption('constraints'));
+        $this->assertSame([$valid], $form->getConfig()->getOption('constraints'));
     }
 
     public function testValidatorInterface()
@@ -69,21 +69,21 @@ class FormTypeValidatorExtensionTest extends BaseValidatorExtensionTest
         $form = Forms::createFormFactoryBuilder()
             ->addExtension(new ValidatorExtension(Validation::createValidator()))
             ->getFormFactory()
-            ->create(FormTypeTest::TESTED_TYPE, null, (array('validation_groups' => new GroupSequence(array('First', 'Second')))))
-            ->add('field', TextTypeTest::TESTED_TYPE, array(
-                'constraints' => array(
-                    new Length(array('min' => 10, 'groups' => array('First'))),
-                    new Email(array('groups' => array('Second'))),
-                ),
-            ))
+            ->create(FormTypeTest::TESTED_TYPE, null, (['validation_groups' => new GroupSequence(['First', 'Second'])]))
+            ->add('field', TextTypeTest::TESTED_TYPE, [
+                'constraints' => [
+                    new Length(['min' => 10, 'groups' => ['First']]),
+                    new Email(['groups' => ['Second']]),
+                ],
+            ])
         ;
 
-        $form->submit(array('field' => 'wrong'));
+        $form->submit(['field' => 'wrong']);
 
         $this->assertCount(1, $form->getErrors(true));
     }
 
-    protected function createForm(array $options = array())
+    protected function createForm(array $options = [])
     {
         return $this->factory->create(FormTypeTest::TESTED_TYPE, null, $options);
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/SubmitTypeValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/SubmitTypeValidatorExtensionTest.php
index 015b9582b5..c347c89bce 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Type/SubmitTypeValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Type/SubmitTypeValidatorExtensionTest.php
@@ -17,7 +17,7 @@ class SubmitTypeValidatorExtensionTest extends BaseValidatorExtensionTest
 {
     use ValidatorExtensionTrait;
 
-    protected function createForm(array $options = array())
+    protected function createForm(array $options = [])
     {
         return $this->factory->create('Symfony\Component\Form\Extension\Core\Type\SubmitType', null, $options);
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
index c3ee7303ef..0803e18de9 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/Util/ServerParamsTest.php
@@ -31,8 +31,8 @@ class ServerParamsTest extends TestCase
 
     public function testGetContentLengthFromRequest()
     {
-        $request = Request::create('http://foo', 'GET', array(), array(), array(), array('CONTENT_LENGTH' => 1024));
-        $requestStack = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestStack')->setMethods(array('getCurrentRequest'))->getMock();
+        $request = Request::create('http://foo', 'GET', [], [], [], ['CONTENT_LENGTH' => 1024]);
+        $requestStack = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestStack')->setMethods(['getCurrentRequest'])->getMock();
         $requestStack->expects($this->once())->method('getCurrentRequest')->will($this->returnValue($request));
         $serverParams = new ServerParams($requestStack);
 
@@ -42,7 +42,7 @@ class ServerParamsTest extends TestCase
     /** @dataProvider getGetPostMaxSizeTestData */
     public function testGetPostMaxSize($size, $bytes)
     {
-        $serverParams = $this->getMockBuilder('Symfony\Component\Form\Extension\Validator\Util\ServerParams')->setMethods(array('getNormalizedIniPostMaxSize'))->getMock();
+        $serverParams = $this->getMockBuilder('Symfony\Component\Form\Extension\Validator\Util\ServerParams')->setMethods(['getNormalizedIniPostMaxSize'])->getMock();
         $serverParams
             ->expects($this->any())
             ->method('getNormalizedIniPostMaxSize')
@@ -53,20 +53,20 @@ class ServerParamsTest extends TestCase
 
     public function getGetPostMaxSizeTestData()
     {
-        return array(
-            array('2k', 2048),
-            array('2 k', 2048),
-            array('8m', 8 * 1024 * 1024),
-            array('+2 k', 2048),
-            array('+2???k', 2048),
-            array('0x10', 16),
-            array('0xf', 15),
-            array('010', 8),
-            array('+0x10 k', 16 * 1024),
-            array('1g', 1024 * 1024 * 1024),
-            array('-1', -1),
-            array('0', 0),
-            array('2mk', 2048), // the unit must be the last char, so in this case 'k', not 'm'
-        );
+        return [
+            ['2k', 2048],
+            ['2 k', 2048],
+            ['8m', 8 * 1024 * 1024],
+            ['+2 k', 2048],
+            ['+2???k', 2048],
+            ['0x10', 16],
+            ['0xf', 15],
+            ['010', 8],
+            ['+0x10 k', 16 * 1024],
+            ['1g', 1024 * 1024 * 1024],
+            ['-1', -1],
+            ['0', 0],
+            ['2mk', 2048], // the unit must be the last char, so in this case 'k', not 'm'
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
index a2b4e2ef9f..ce18d0b6c5 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorExtensionTest.php
@@ -22,7 +22,7 @@ class ValidatorExtensionTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
         $metadata = $this->getMockBuilder('Symfony\Component\Validator\Mapping\ClassMetadata')
-            ->setMethods(array('addConstraint', 'addPropertyConstraint'))
+            ->setMethods(['addConstraint', 'addPropertyConstraint'])
             ->disableOriginalConstructor()
             ->getMock();
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
index 1a743cdfe8..d14c89c2cb 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
@@ -62,13 +62,13 @@ class ValidatorTypeGuesserTest extends TestCase
 
     public function guessRequiredProvider()
     {
-        return array(
-            array(new NotNull(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)),
-            array(new NotBlank(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)),
-            array(new IsTrue(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)),
-            array(new Length(10), new ValueGuess(false, Guess::LOW_CONFIDENCE)),
-            array(new Range(array('min' => 1, 'max' => 20)), new ValueGuess(false, Guess::LOW_CONFIDENCE)),
-        );
+        return [
+            [new NotNull(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)],
+            [new NotBlank(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)],
+            [new IsTrue(), new ValueGuess(true, Guess::HIGH_CONFIDENCE)],
+            [new Length(10), new ValueGuess(false, Guess::LOW_CONFIDENCE)],
+            [new Range(['min' => 1, 'max' => 20]), new ValueGuess(false, Guess::LOW_CONFIDENCE)],
+        ];
     }
 
     /**
@@ -92,7 +92,7 @@ class ValidatorTypeGuesserTest extends TestCase
 
     public function testGuessMaxLengthForConstraintWithMaxValue()
     {
-        $constraint = new Length(array('max' => '2'));
+        $constraint = new Length(['max' => '2']);
 
         $result = $this->guesser->guessMaxLengthForConstraint($constraint);
         $this->assertInstanceOf('Symfony\Component\Form\Guess\ValueGuess', $result);
@@ -102,7 +102,7 @@ class ValidatorTypeGuesserTest extends TestCase
 
     public function testGuessMaxLengthForConstraintWithMinValue()
     {
-        $constraint = new Length(array('min' => '2'));
+        $constraint = new Length(['min' => '2']);
 
         $result = $this->guesser->guessMaxLengthForConstraint($constraint);
         $this->assertNull($result);
@@ -110,12 +110,12 @@ class ValidatorTypeGuesserTest extends TestCase
 
     public function maxLengthTypeProvider()
     {
-        return array(
-            array('double'),
-            array('float'),
-            array('numeric'),
-            array('real'),
-        );
+        return [
+            ['double'],
+            ['float'],
+            ['numeric'],
+            ['real'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
index 66e2dafff8..1278a86e22 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationMapperTest.php
@@ -64,14 +64,14 @@ class ViolationMapperTest extends TestCase
         $this->mapper = new ViolationMapper();
         $this->message = 'Message';
         $this->messageTemplate = 'Message template';
-        $this->params = array('foo' => 'bar');
+        $this->params = ['foo' => 'bar'];
     }
 
-    protected function getForm($name = 'name', $propertyPath = null, $dataClass = null, $errorMapping = array(), $inheritData = false, $synchronized = true)
+    protected function getForm($name = 'name', $propertyPath = null, $dataClass = null, $errorMapping = [], $inheritData = false, $synchronized = true)
     {
-        $config = new FormConfigBuilder($name, $dataClass, $this->dispatcher, array(
+        $config = new FormConfigBuilder($name, $dataClass, $this->dispatcher, [
             'error_mapping' => $errorMapping,
-        ));
+        ]);
         $config->setMapped(true);
         $config->setInheritData($inheritData);
         $config->setPropertyPath($propertyPath);
@@ -121,54 +121,54 @@ class ViolationMapperTest extends TestCase
     {
         $violation = $this->getConstraintViolation('children[address].data.foo');
         $parent = $this->getForm('parent');
-        $child = $this->getForm('address', 'address', null, array(), true);
+        $child = $this->getForm('address', 'address', null, [], true);
         $grandChild = $this->getForm('street');
 
         $parent->add($child);
         $child->add($grandChild);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
         $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
-        $this->assertEquals(array($this->getFormError($violation, $child)), iterator_to_array($child->getErrors()), $child->getName().' should have an error, but has none');
+        $this->assertEquals([$this->getFormError($violation, $child)], iterator_to_array($child->getErrors()), $child->getName().' should have an error, but has none');
         $this->assertCount(0, $grandChild->getErrors(), $grandChild->getName().' should not have an error, but has one');
     }
 
     public function testFollowDotRules()
     {
         $violation = $this->getConstraintViolation('data.foo');
-        $parent = $this->getForm('parent', null, null, array(
+        $parent = $this->getForm('parent', null, null, [
             'foo' => 'address',
-        ));
-        $child = $this->getForm('address', null, null, array(
+        ]);
+        $child = $this->getForm('address', null, null, [
             '.' => 'street',
-        ));
-        $grandChild = $this->getForm('street', null, null, array(
+        ]);
+        $grandChild = $this->getForm('street', null, null, [
             '.' => 'name',
-        ));
+        ]);
         $grandGrandChild = $this->getForm('name');
 
         $parent->add($child);
         $child->add($grandChild);
         $grandChild->add($grandGrandChild);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
         $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
         $this->assertCount(0, $child->getErrors(), $child->getName().' should not have an error, but has one');
         $this->assertCount(0, $grandChild->getErrors(), $grandChild->getName().' should not have an error, but has one');
-        $this->assertEquals(array($this->getFormError($violation, $grandGrandChild)), iterator_to_array($grandGrandChild->getErrors()), $grandGrandChild->getName().' should have an error, but has none');
+        $this->assertEquals([$this->getFormError($violation, $grandGrandChild)], iterator_to_array($grandGrandChild->getErrors()), $grandGrandChild->getName().' should have an error, but has none');
     }
 
     public function testAbortMappingIfNotSynchronized()
     {
         $violation = $this->getConstraintViolation('children[address].data.street');
         $parent = $this->getForm('parent');
-        $child = $this->getForm('address', 'address', null, array(), false, false);
+        $child = $this->getForm('address', 'address', null, [], false, false);
         // even though "street" is synchronized, it should not have any errors
         // due to its parent not being synchronized
         $grandChild = $this->getForm('street', 'street');
@@ -177,7 +177,7 @@ class ViolationMapperTest extends TestCase
         $child->add($grandChild);
 
         // invoke the transformer and mark the form unsynchronized
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
@@ -190,9 +190,9 @@ class ViolationMapperTest extends TestCase
     {
         $violation = $this->getConstraintViolation('data.address');
         $parent = $this->getForm('parent');
-        $child = $this->getForm('address', 'address', null, array(
+        $child = $this->getForm('address', 'address', null, [
             '.' => 'street',
-        ), false, false);
+        ], false, false);
         // even though "street" is synchronized, it should not have any errors
         // due to its parent not being synchronized
         $grandChild = $this->getForm('street');
@@ -201,7 +201,7 @@ class ViolationMapperTest extends TestCase
         $child->add($grandChild);
 
         // invoke the transformer and mark the form unsynchronized
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
@@ -221,8 +221,8 @@ class ViolationMapperTest extends TestCase
         $child->add($grandChild);
 
         // Disable automatic submission of missing fields
-        $parent->submit(array(), false);
-        $child->submit(array(), false);
+        $parent->submit([], false);
+        $child->submit([], false);
 
         // $grandChild is not submitted
 
@@ -237,17 +237,17 @@ class ViolationMapperTest extends TestCase
     {
         $violation = $this->getConstraintViolation('data.address');
         $parent = $this->getForm('parent');
-        $child = $this->getForm('address', 'address', null, array(
+        $child = $this->getForm('address', 'address', null, [
             '.' => 'street',
-        ));
+        ]);
         $grandChild = $this->getForm('street');
 
         $parent->add($child);
         $child->add($grandChild);
 
         // Disable automatic submission of missing fields
-        $parent->submit(array(), false);
-        $child->submit(array(), false);
+        $parent->submit([], false);
+        $child->submit([], false);
 
         // $grandChild is not submitted
 
@@ -262,526 +262,526 @@ class ViolationMapperTest extends TestCase
     {
         // The mapping must be deterministic! If a child has the property path "[street]",
         // "data[street]" should be mapped, but "data.street" should not!
-        return array(
+        return [
             // mapping target, child name, its property path, grand child name, its property path, violation path
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', ''),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data'),
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', ''],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data'],
 
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_1, 'address', 'address', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address].data[street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'data.person.address.street'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'data.person.address.street.prop'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'data.person.address[street]'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address].street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address][street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address][street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address.street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address[street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'data.person.address.street'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', 'street', 'data.person.address.street.prop'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'data.person.address[street]'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', 'street', 'data.person.address[street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address].street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address].street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address][street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.person[address][street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address.street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address.street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address[street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'data.person.address.street'),
-            array(self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'data.person.address.street.prop'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'data.person.address[street]'),
-            array(self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address].street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address][street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address][street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address.street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address[street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'children[address].data[street].prop'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'data.person.address.street'],
+            [self::LEVEL_1, 'address', 'person.address', 'street', '[street]', 'data.person.address.street.prop'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'data.person.address[street]'],
+            [self::LEVEL_2, 'address', 'person.address', 'street', '[street]', 'data.person.address[street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address].street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address].street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address][street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data.person[address][street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address.street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address.street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address[street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', '[street]', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address[street].prop'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'data.person[address].street'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'data.person[address].street.prop'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'data.person[address][street]'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'data.person[address][street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address.street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address[street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address.street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address.street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address[street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data.person.address[street].prop'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'data.person[address].street'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', 'street', 'data.person[address].street.prop'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'data.person[address][street]'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', 'street', 'data.person[address][street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address.street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address.street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address[street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', 'street', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address[street].prop'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'data.person[address].street'),
-            array(self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'data.person[address].street.prop'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'data.person[address][street]'),
-            array(self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'data.person[address][street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address.street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address.street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address[street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address.street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address.street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address[street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data.person.address[street].prop'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'data.person[address].street'],
+            [self::LEVEL_1, 'address', 'person[address]', 'street', '[street]', 'data.person[address].street.prop'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'data.person[address][street]'],
+            [self::LEVEL_2, 'address', 'person[address]', 'street', '[street]', 'data.person[address][street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address.street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address.street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address[street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', 'person[address]', 'street', '[street]', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address].street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address].street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address][street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address][street].prop'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'data[person].address.street'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'data[person].address.street.prop'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'data[person].address[street]'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address.street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address.street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address[street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person.address[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address].street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address].street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address][street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data.person[address][street].prop'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'data[person].address.street'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', 'street', 'data[person].address.street.prop'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'data[person].address[street]'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', 'street', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', 'street', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address].street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address].street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address][street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address][street].prop'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'data[person].address.street'),
-            array(self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'data[person].address.street.prop'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'data[person].address[street]'),
-            array(self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'data[person].address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address].street'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address].street.prop'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address][street]'),
-            array(self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address.street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address.street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address[street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person.address[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address].street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address].street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address][street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data.person[address][street].prop'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'data[person].address.street'],
+            [self::LEVEL_1, 'address', '[person].address', 'street', '[street]', 'data[person].address.street.prop'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'data[person].address[street]'],
+            [self::LEVEL_2, 'address', '[person].address', 'street', '[street]', 'data[person].address[street].prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address].street'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address].street.prop'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address][street]'],
+            [self::LEVEL_0, 'address', '[person].address', 'street', '[street]', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address]'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address].street'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address].street.prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address][street]'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address][street].prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address.street'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address.street.prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address[street]'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address[street].prop'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'data[person][address].street'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'data[person][address].street.prop'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'data[person][address][street]'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'data[person][address][street].prop'),
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address]'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data'],
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address.street'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address.street.prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address[street]'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person.address[street].prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address].street'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address].street.prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address][street]'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data.person[address][street].prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address.street'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address.street.prop'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address[street]'],
+            [self::LEVEL_0, 'address', '[person][address]', 'street', 'street', 'data[person].address[street].prop'],
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'data[person][address].street'],
+            [self::LEVEL_2, 'address', '[person][address]', 'street', 'street', 'data[person][address].street.prop'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'data[person][address][street]'],
+            [self::LEVEL_1, 'address', '[person][address]', 'street', 'street', 'data[person][address][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', '[street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', '[person][address]', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address', '[person][address]', 'street', '[street]', 'children[address].data[street].prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', '[street]', 'data.person.address.street'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', '[street]', 'data.person.address.street.prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', '[street]', 'data.person.address[street]'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', '[street]', 'data.person.address[street].prop'),
-            array(self::LEVEL_0, 'address', '[person][address]', 'street', '[street]', 'data.person[address].street'),
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-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office][street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office][street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office.street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office.street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office[street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office[street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office].street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office].street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office][street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office][street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address].office.street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address].office.street.prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'data[address].office[street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'data[address].office[street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office].street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office].street.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office][street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office][street].prop'),
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data.office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data.office.street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'children[address].data.office[street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'children[address].data.office[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office].street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office].street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office][street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'children[address].data[office][street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office.street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office.street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office[street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address.office[street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office].street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office].street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office][street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', 'office[street]', 'data.address[office][street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address].office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address].office.street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'data[address].office[street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'office[street]', 'data[address].office[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office].street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office].street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office][street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', 'office[street]', 'data[address][office][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'children[address].children[street].data'),
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-            array(self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address].office.street'),
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-            array(self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address][office][street].prop'),
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data.office'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data.office.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data.office.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data.office[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data.office[street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data[office]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'children[address].data[office].street'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'children[address].data[office].street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data[office][street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'children[address].data[office][street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address.office.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address.office.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address.office[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address.office[street].prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'data.address[office].street'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office].street', 'data.address[office].street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address[office][street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office].street', 'data.address[office][street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address].office.street'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address].office.street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address].office[street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address].office[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address][office].street'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address][office].street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address][office][street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office].street', 'data[address][office][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'children[address].children[street].data'),
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-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office[street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office[street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data[office]'),
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-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address].office.street.prop'),
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-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address][office][street].prop'),
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office.street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office[street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data.office[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data[office]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'children[address].data[office].street'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'children[address].data[office].street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data[office][street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'children[address].data[office][street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address.office.street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address.office.street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address.office[street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address.office[street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address[office].street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address[office].street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address[office][street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office].street', 'data.address[office][street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address].office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address].office.street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address].office[street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address].office[street].prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'data[address][office].street'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office].street', 'data[address][office].street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address][office][street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office].street', 'data[address][office][street].prop'],
 
-            array(self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].children[street].data'),
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-            array(self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office[street]'),
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-            array(self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data[office].street'),
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-            array(self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].data[office][street]'),
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-            array(self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address.office.street'),
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-            array(self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address][office][street].prop'),
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data.office[street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data[office]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data[office].street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'children[address].data[office].street.prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].data[office][street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'children[address].data[office][street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address.office.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address.office.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address.office[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address.office[street].prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address[office].street'],
+            [self::LEVEL_1, 'address', 'address', 'street', '[office][street]', 'data.address[office].street.prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'data.address[office][street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[office][street]', 'data.address[office][street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address].office.street'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address].office.street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address].office[street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address].office[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address][office].street'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address][office].street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address][office][street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', '[office][street]', 'data[address][office][street].prop'],
 
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office.street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office.street.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office[street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office[street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office].street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office].street.prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office][street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office][street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office.street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office.street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office[street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office[street].prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office].street'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office].street.prop'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office][street]'),
-            array(self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office][street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office.street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office.street.prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office[street]'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office[street].prop'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address][office].street'),
-            array(self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address][office].street.prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'data[address][office][street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'data[address][office][street].prop'),
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office.street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office[street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data.office[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office].street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office].street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office][street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'children[address].data[office][street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office.street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office.street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office[street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address.office[street].prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office].street'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office].street.prop'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office][street]'],
+            [self::LEVEL_0, 'address', '[address]', 'street', '[office][street]', 'data.address[office][street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office.street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office.street.prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office[street]'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address].office[street].prop'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address][office].street'],
+            [self::LEVEL_1, 'address', '[address]', 'street', '[office][street]', 'data[address][office].street.prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'data[address][office][street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[office][street]', 'data[address][office][street].prop'],
 
             // Edge cases which must not occur
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address][street]'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address][street].prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address][street]'),
-            array(self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address][street].prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address][street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address][street].prop'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address][street]'),
-            array(self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address][street].prop'),
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address][street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address][street].prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address][street]'],
+            [self::LEVEL_2, 'address', 'address', 'street', '[street]', 'children[address][street].prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address][street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', 'street', 'children[address][street].prop'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address][street]'],
+            [self::LEVEL_2, 'address', '[address]', 'street', '[street]', 'children[address][street].prop'],
 
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].children[address].children[street]'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].children[address].data.street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].data.address.street'),
-            array(self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.address.street'),
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].children[address].children[street]'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].children[address].data.street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'children[person].data.address.street'],
+            [self::LEVEL_0, 'address', 'person.address', 'street', 'street', 'data.address.street'],
 
-            array(self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].children[office].children[street]'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].children[office].data.street'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'data.address.street'),
-        );
+            [self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].children[office].children[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].children[office].data.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'children[address].data.street'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'office.street', 'data.address.street'],
+        ];
     }
 
     /**
@@ -797,446 +797,446 @@ class ViolationMapperTest extends TestCase
         $parent->add($child);
         $child->add($grandChild);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
         if (self::LEVEL_0 === $target) {
-            $this->assertEquals(array($this->getFormError($violation, $parent)), iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $parent)], iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } elseif (self::LEVEL_1 === $target) {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $child)), iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $child)], iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } else {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $grandChild)), iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $grandChild)], iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
         }
     }
 
     public function provideCustomDataErrorTests()
     {
-        return array(
+        return [
             // mapping target, error mapping, child name, its property path, grand child name, its property path, violation path
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].prop'),
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].prop'),
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_1, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', 'address', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'],
 
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street].prop'],
 
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'],
 
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street].prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street.prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street]'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[street].prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].street.prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street]'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][street].prop'],
 
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', 'street', 'data[address][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street].prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street.prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street]'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.foo[street].prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo].street.prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street]'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[foo][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street].prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street.prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street]'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street].prop'),
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data.address[street].prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address].street.prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street]'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', '[address]', 'street', '[street]', 'data[address][street].prop'],
 
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'),
-            array(self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'),
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'),
+            [self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'],
+            [self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'],
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'],
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'),
-            array(self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'),
-            array(self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'),
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'],
+            [self::LEVEL_1, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'],
+            [self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'],
+            [self::LEVEL_2, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'],
+            [self::LEVEL_0, 'foo.bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'),
-            array(self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'],
+            [self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'],
+            [self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'),
-            array(self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'),
-            array(self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'],
+            [self::LEVEL_1, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'],
+            [self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'],
+            [self::LEVEL_2, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'],
+            [self::LEVEL_0, 'foo[bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'),
-            array(self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'],
+            [self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'],
+            [self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'),
-            array(self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'),
-            array(self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'),
-            array(self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'],
+            [self::LEVEL_1, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'],
+            [self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'],
+            [self::LEVEL_2, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'],
+            [self::LEVEL_0, '[foo].bar', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'),
-            array(self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo].bar[street].prop'],
+            [self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street'],
+            [self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar].street.prop'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street]'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', 'street', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'),
-            array(self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'),
-            array(self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'),
-            array(self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'),
-            array(self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'),
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar.street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo.bar[street].prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar].street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data.foo[bar][street].prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar.street.prop'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street]'],
+            [self::LEVEL_0, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo].bar[street].prop'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street'],
+            [self::LEVEL_1, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar].street.prop'],
+            [self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street]'],
+            [self::LEVEL_2, '[foo][bar]', 'address', 'address', 'address', 'street', '[street]', 'data[foo][bar][street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', 'street', 'data.foo'],
+            [self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.prop'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo]'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].prop'),
+            [self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo'],
+            [self::LEVEL_2, 'foo', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.prop'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo]'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.prop'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo]'),
-            array(self::LEVEL_2, '[foo]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].prop'),
+            [self::LEVEL_2, 'foo', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo'],
+            [self::LEVEL_2, 'foo', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.prop'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo]'],
+            [self::LEVEL_2, '[foo]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].prop'],
 
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', 'street', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.bar'),
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.bar.prop'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo[bar]'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo[bar].prop'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].bar'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].bar.prop'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo][bar]'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo][bar].prop'),
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.bar'],
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo.bar.prop'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo[bar]'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data.foo[bar].prop'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].bar'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo].bar.prop'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo][bar]'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', 'address', 'street', '[street]', 'data[foo][bar].prop'],
 
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.bar'),
-            array(self::LEVEL_2, 'foo.bar', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.bar.prop'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo[bar]'),
-            array(self::LEVEL_2, 'foo[bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo[bar].prop'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].bar'),
-            array(self::LEVEL_2, '[foo].bar', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].bar.prop'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo][bar]'),
-            array(self::LEVEL_2, '[foo][bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo][bar].prop'),
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.bar'],
+            [self::LEVEL_2, 'foo.bar', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo.bar.prop'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo[bar]'],
+            [self::LEVEL_2, 'foo[bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data.foo[bar].prop'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].bar'],
+            [self::LEVEL_2, '[foo].bar', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo].bar.prop'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo][bar]'],
+            [self::LEVEL_2, '[foo][bar]', 'address.street', 'address', '[address]', 'street', 'street', 'data[foo][bar].prop'],
 
             // Edge cases
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_2, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_0, 'foo', 'address', 'address', '[address]', 'street', 'street', 'data[foo][street].prop'],
 
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'),
-            array(self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'),
-        );
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo.street.prop'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street]'],
+            [self::LEVEL_0, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data.foo[street].prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street'],
+            [self::LEVEL_2, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo].street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'address', 'address', 'street', 'street', 'data[foo][street].prop'],
+        ];
     }
 
     /**
@@ -1245,7 +1245,7 @@ class ViolationMapperTest extends TestCase
     public function testCustomDataErrorMapping($target, $mapFrom, $mapTo, $childName, $childPath, $grandChildName, $grandChildPath, $violationPath)
     {
         $violation = $this->getConstraintViolation($violationPath);
-        $parent = $this->getForm('parent', null, null, array($mapFrom => $mapTo));
+        $parent = $this->getForm('parent', null, null, [$mapFrom => $mapTo]);
         $child = $this->getForm($childName, $childPath);
         $grandChild = $this->getForm($grandChildName, $grandChildPath);
 
@@ -1267,7 +1267,7 @@ class ViolationMapperTest extends TestCase
             $parent->add($distraction);
         }
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
@@ -1276,17 +1276,17 @@ class ViolationMapperTest extends TestCase
         }
 
         if (self::LEVEL_0 === $target) {
-            $this->assertEquals(array($this->getFormError($violation, $parent)), iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $parent)], iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } elseif (self::LEVEL_1 === $target) {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $child)), iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $child)], iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } else {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $grandChild)), iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $grandChild)], iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
         }
     }
 
@@ -1298,145 +1298,145 @@ class ViolationMapperTest extends TestCase
         // 1) the error actually maps to an existing child and
         // 2) the property path of that child (relative to the form providing
         //    the mapping) matches the left side of the mapping
-        return array(
+        return [
             // mapping target, map from, map to, child name, its property path, grand child name, its property path, violation path
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street].prop'],
 
             // Property path of the erroneous field and mapping must match exactly
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'),
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street'),
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'),
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street]'),
-            array(self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'),
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'],
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street'],
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'],
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street]'],
+            [self::LEVEL_1B, 'foo', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'),
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street'),
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'),
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street]'),
-            array(self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'),
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'],
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street'],
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'],
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street]'],
+            [self::LEVEL_1B, '[foo]', 'address', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'),
-            array(self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_2, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street'),
-            array(self::LEVEL_2, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'),
-            array(self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street]'),
-            array(self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'),
+            [self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data'],
+            [self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_2, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street'],
+            [self::LEVEL_2, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data.street.prop'],
+            [self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street]'],
+            [self::LEVEL_1, '[foo]', 'address', 'foo', '[foo]', 'address', 'address', 'street', 'street', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data.street'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street].prop'],
 
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].children[street].data'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data[street].prop'),
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].children[street].data'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data.street'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].children[street].data.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].children[street].data.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data.street'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo].data[street].prop'],
 
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street.prop'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street].prop'),
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street].data.prop'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street.prop'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'foo', 'address', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street].prop'],
 
             // Map to a nested child
-            array(self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo]'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo]'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo]'),
-            array(self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo]'),
+            [self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[foo]'],
+            [self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[foo]'],
+            [self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[foo]'],
+            [self::LEVEL_2, 'foo', 'address.street', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[foo]'],
 
             // Map from a nested child
-            array(self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
+            [self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1B, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, 'address.street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
 
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1B, 'address[street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, 'address[street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
 
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1B, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, '[address].street', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
 
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'),
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'),
-            array(self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'),
-            array(self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'),
-            array(self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'),
-        );
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', 'address', 'street', '[street]', 'children[address].data[street]'],
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].children[street]'],
+            [self::LEVEL_2, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].children[street]'],
+            [self::LEVEL_1, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data.street'],
+            [self::LEVEL_1B, '[address][street]', 'foo', 'foo', 'foo', 'address', '[address]', 'street', '[street]', 'children[address].data[street]'],
+        ];
     }
 
     /**
@@ -1445,7 +1445,7 @@ class ViolationMapperTest extends TestCase
     public function testCustomFormErrorMapping($target, $mapFrom, $mapTo, $errorName, $errorPath, $childName, $childPath, $grandChildName, $grandChildPath, $violationPath)
     {
         $violation = $this->getConstraintViolation($violationPath);
-        $parent = $this->getForm('parent', null, null, array($mapFrom => $mapTo));
+        $parent = $this->getForm('parent', null, null, [$mapFrom => $mapTo]);
         $child = $this->getForm($childName, $childPath);
         $grandChild = $this->getForm($grandChildName, $grandChildPath);
         $errorChild = $this->getForm($errorName, $errorPath);
@@ -1454,22 +1454,22 @@ class ViolationMapperTest extends TestCase
         $parent->add($errorChild);
         $child->add($grandChild);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
         if (self::LEVEL_0 === $target) {
             $this->assertCount(0, $errorChild->getErrors(), $errorName.' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $parent)), iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $parent)], iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } elseif (self::LEVEL_1 === $target) {
             $this->assertCount(0, $errorChild->getErrors(), $errorName.' should not have an error, but has one');
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $child)), iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $child)], iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } elseif (self::LEVEL_1B === $target) {
-            $this->assertEquals(array($this->getFormError($violation, $errorChild)), iterator_to_array($errorChild->getErrors()), $errorName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $errorChild)], iterator_to_array($errorChild->getErrors()), $errorName.' should have an error, but has none');
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
@@ -1477,33 +1477,33 @@ class ViolationMapperTest extends TestCase
             $this->assertCount(0, $errorChild->getErrors(), $errorName.' should not have an error, but has one');
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $grandChild)), iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $grandChild)], iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
         }
     }
 
     public function provideErrorTestsForFormInheritingParentData()
     {
-        return array(
+        return [
             // mapping target, child name, its property path, grand child name, its property path, violation path
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street.prop'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street]'),
-            array(self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street].prop'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.street'),
-            array(self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.street.prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[street]'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[street].prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address.street'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address.street.prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address[street]'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address[street].prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street.prop'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street]'),
-            array(self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street].prop'),
-        );
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].children[street].data.prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'children[address].data.street.prop'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street]'],
+            [self::LEVEL_1, 'address', 'address', 'street', 'street', 'children[address].data[street].prop'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.street'],
+            [self::LEVEL_2, 'address', 'address', 'street', 'street', 'data.street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address.street'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address.street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address[street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data.address[street].prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address].street.prop'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street]'],
+            [self::LEVEL_0, 'address', 'address', 'street', 'street', 'data[address][street].prop'],
+        ];
     }
 
     /**
@@ -1513,28 +1513,28 @@ class ViolationMapperTest extends TestCase
     {
         $violation = $this->getConstraintViolation($violationPath);
         $parent = $this->getForm('parent');
-        $child = $this->getForm($childName, $childPath, null, array(), true);
+        $child = $this->getForm($childName, $childPath, null, [], true);
         $grandChild = $this->getForm($grandChildName, $grandChildPath);
 
         $parent->add($child);
         $child->add($grandChild);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $this->mapper->mapViolation($violation, $parent);
 
         if (self::LEVEL_0 === $target) {
-            $this->assertEquals(array($this->getFormError($violation, $parent)), iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $parent)], iterator_to_array($parent->getErrors()), $parent->getName().' should have an error, but has none');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } elseif (self::LEVEL_1 === $target) {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $child)), iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $child)], iterator_to_array($child->getErrors()), $childName.' should have an error, but has none');
             $this->assertCount(0, $grandChild->getErrors(), $grandChildName.' should not have an error, but has one');
         } else {
             $this->assertCount(0, $parent->getErrors(), $parent->getName().' should not have an error, but has one');
             $this->assertCount(0, $child->getErrors(), $childName.' should not have an error, but has one');
-            $this->assertEquals(array($this->getFormError($violation, $grandChild)), iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
+            $this->assertEquals([$this->getFormError($violation, $grandChild)], iterator_to_array($grandChild->getErrors()), $grandChildName.' should have an error, but has none');
         }
     }
 
@@ -1543,8 +1543,8 @@ class ViolationMapperTest extends TestCase
         $parent = $this->getForm('parent');
         $child1 = $this->getForm('subform1', 'address');
         $child2 = $this->getForm('subform2', 'address');
-        $child3 = $this->getForm('subform3', null, null, array(), true);
-        $child4 = $this->getForm('subform4', null, null, array(), true);
+        $child3 = $this->getForm('subform3', null, null, [], true);
+        $child4 = $this->getForm('subform4', null, null, [], true);
         $grandChild1 = $this->getForm('street');
         $grandChild2 = $this->getForm('street', '[sub_address1_street]');
         $grandChild3 = $this->getForm('street', '[sub_address2_street]');
@@ -1557,7 +1557,7 @@ class ViolationMapperTest extends TestCase
         $child3->add($grandChild2);
         $child4->add($grandChild3);
 
-        $parent->submit(array());
+        $parent->submit([]);
 
         $violation1 = $this->getConstraintViolation('data.address[street]');
         $violation2 = $this->getConstraintViolation('data[sub_address1_street]');
@@ -1571,8 +1571,8 @@ class ViolationMapperTest extends TestCase
         $this->assertCount(0, $child2->getErrors(), $child2->getName().' should not have an error, but has one');
         $this->assertCount(0, $child3->getErrors(), $child3->getName().' should not have an error, but has one');
         $this->assertCount(0, $child4->getErrors(), $child4->getName().' should not have an error, but has one');
-        $this->assertEquals(array($this->getFormError($violation1, $grandChild1)), iterator_to_array($grandChild1->getErrors()), $grandChild1->getName().' should have an error, but has none');
-        $this->assertEquals(array($this->getFormError($violation2, $grandChild2)), iterator_to_array($grandChild2->getErrors()), $grandChild2->getName().' should have an error, but has none');
-        $this->assertEquals(array($this->getFormError($violation3, $grandChild3)), iterator_to_array($grandChild3->getErrors()), $grandChild3->getName().' should have an error, but has none');
+        $this->assertEquals([$this->getFormError($violation1, $grandChild1)], iterator_to_array($grandChild1->getErrors()), $grandChild1->getName().' should have an error, but has none');
+        $this->assertEquals([$this->getFormError($violation2, $grandChild2)], iterator_to_array($grandChild2->getErrors()), $grandChild2->getName().' should have an error, but has none');
+        $this->assertEquals([$this->getFormError($violation3, $grandChild3)], iterator_to_array($grandChild3->getErrors()), $grandChild3->getName().' should have an error, but has none');
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
index 2e1c9f673d..7a6602d27e 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Validator/ViolationMapper/ViolationPathTest.php
@@ -21,67 +21,67 @@ class ViolationPathTest extends TestCase
 {
     public function providePaths()
     {
-        return array(
-            array('children[address]', array(
-                array('address', true, true),
-            )),
-            array('children[address].children[street]', array(
-                array('address', true, true),
-                array('street', true, true),
-            )),
-            array('children[address][street]', array(
-                array('address', true, true),
-                array('street', true, true),
-            ), 'children[address].children[street]'),
-            array('children[address].data', array(
-                array('address', true, true),
-            ), 'children[address]'),
-            array('children[address].data.street', array(
-                array('address', true, true),
-                array('street', false, false),
-            )),
-            array('children[address].data[street]', array(
-                array('address', true, true),
-                array('street', false, true),
-            )),
-            array('children[address].children[street].data.name', array(
-                array('address', true, true),
-                array('street', true, true),
-                array('name', false, false),
-            )),
-            array('children[address].children[street].data[name]', array(
-                array('address', true, true),
-                array('street', true, true),
-                array('name', false, true),
-            )),
-            array('data.address', array(
-                array('address', false, false),
-            )),
-            array('data[address]', array(
-                array('address', false, true),
-            )),
-            array('data.address.street', array(
-                array('address', false, false),
-                array('street', false, false),
-            )),
-            array('data[address].street', array(
-                array('address', false, true),
-                array('street', false, false),
-            )),
-            array('data.address[street]', array(
-                array('address', false, false),
-                array('street', false, true),
-            )),
-            array('data[address][street]', array(
-                array('address', false, true),
-                array('street', false, true),
-            )),
+        return [
+            ['children[address]', [
+                ['address', true, true],
+            ]],
+            ['children[address].children[street]', [
+                ['address', true, true],
+                ['street', true, true],
+            ]],
+            ['children[address][street]', [
+                ['address', true, true],
+                ['street', true, true],
+            ], 'children[address].children[street]'],
+            ['children[address].data', [
+                ['address', true, true],
+            ], 'children[address]'],
+            ['children[address].data.street', [
+                ['address', true, true],
+                ['street', false, false],
+            ]],
+            ['children[address].data[street]', [
+                ['address', true, true],
+                ['street', false, true],
+            ]],
+            ['children[address].children[street].data.name', [
+                ['address', true, true],
+                ['street', true, true],
+                ['name', false, false],
+            ]],
+            ['children[address].children[street].data[name]', [
+                ['address', true, true],
+                ['street', true, true],
+                ['name', false, true],
+            ]],
+            ['data.address', [
+                ['address', false, false],
+            ]],
+            ['data[address]', [
+                ['address', false, true],
+            ]],
+            ['data.address.street', [
+                ['address', false, false],
+                ['street', false, false],
+            ]],
+            ['data[address].street', [
+                ['address', false, true],
+                ['street', false, false],
+            ]],
+            ['data.address[street]', [
+                ['address', false, false],
+                ['street', false, true],
+            ]],
+            ['data[address][street]', [
+                ['address', false, true],
+                ['street', false, true],
+            ]],
             // A few invalid examples
-            array('data', array(), ''),
-            array('children', array(), ''),
-            array('children.address', array(), ''),
-            array('children.address[street]', array(), ''),
-        );
+            ['data', [], ''],
+            ['children', [], ''],
+            ['children.address', [], ''],
+            ['children.address[street]', [], ''],
+        ];
     }
 
     /**
@@ -109,17 +109,17 @@ class ViolationPathTest extends TestCase
 
     public function provideParents()
     {
-        return array(
-            array('children[address]', null),
-            array('children[address].children[street]', 'children[address]'),
-            array('children[address].data.street', 'children[address]'),
-            array('children[address].data[street]', 'children[address]'),
-            array('data.address', null),
-            array('data.address.street', 'data.address'),
-            array('data.address[street]', 'data.address'),
-            array('data[address].street', 'data[address]'),
-            array('data[address][street]', 'data[address]'),
-        );
+        return [
+            ['children[address]', null],
+            ['children[address].children[street]', 'children[address]'],
+            ['children[address].data.street', 'children[address]'],
+            ['children[address].data[street]', 'children[address]'],
+            ['data.address', null],
+            ['data.address.street', 'data.address'],
+            ['data.address[street]', 'data.address'],
+            ['data[address].street', 'data[address]'],
+            ['data[address][street]', 'data[address]'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/AuthorType.php b/src/Symfony/Component/Form/Tests/Fixtures/AuthorType.php
index 504f812dff..84c988984f 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/AuthorType.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/AuthorType.php
@@ -18,8 +18,8 @@ class AuthorType extends AbstractType
 
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'data_class' => 'Symfony\Component\Form\Tests\Fixtures\Author',
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/ChoiceSubType.php b/src/Symfony/Component/Form/Tests/Fixtures/ChoiceSubType.php
index dbd8843d8e..580e215708 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/ChoiceSubType.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/ChoiceSubType.php
@@ -24,12 +24,12 @@ class ChoiceSubType extends AbstractType
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array('expanded' => true));
+        $resolver->setDefaults(['expanded' => true]);
         $resolver->setNormalizer('choices', function () {
-            return array(
+            return [
                 'attr1' => 'Attribute 1',
                 'attr2' => 'Attribute 2',
-            );
+            ];
         });
     }
 
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/ChoiceTypeExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/ChoiceTypeExtension.php
index 55e394a246..34242c5b69 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/ChoiceTypeExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/ChoiceTypeExtension.php
@@ -23,10 +23,10 @@ class ChoiceTypeExtension extends AbstractTypeExtension
      */
     public function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefault('choices', array(
+        $resolver->setDefault('choices', [
             'A' => 'a',
             'B' => 'b',
-        ));
+        ]);
     }
 
     /**
@@ -34,6 +34,6 @@ class ChoiceTypeExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(self::$extendedType);
+        return [self::$extendedType];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php b/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
index 91b2773037..39758e7818 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/CustomArrayObject.php
@@ -21,7 +21,7 @@ class CustomArrayObject implements \ArrayAccess, \IteratorAggregate, \Countable,
 
     public function __construct(array $array = null)
     {
-        $this->array = $array ?: array();
+        $this->array = $array ?: [];
     }
 
     public function offsetExists($offset)
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/FixedFilterListener.php b/src/Symfony/Component/Form/Tests/Fixtures/FixedFilterListener.php
index 5a85ea8d19..7ca0187c64 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/FixedFilterListener.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/FixedFilterListener.php
@@ -21,11 +21,11 @@ class FixedFilterListener implements EventSubscriberInterface
 
     public function __construct(array $mapping)
     {
-        $this->mapping = array_merge(array(
-            'preSubmit' => array(),
-            'onSubmit' => array(),
-            'preSetData' => array(),
-        ), $mapping);
+        $this->mapping = array_merge([
+            'preSubmit' => [],
+            'onSubmit' => [],
+            'preSetData' => [],
+        ], $mapping);
     }
 
     public function preSubmit(FormEvent $event)
@@ -57,10 +57,10 @@ class FixedFilterListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             FormEvents::PRE_SUBMIT => 'preSubmit',
             FormEvents::SUBMIT => 'onSubmit',
             FormEvents::PRE_SET_DATA => 'preSetData',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBarExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBarExtension.php
index 5ed877fdf9..fbe1601d5b 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBarExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBarExtension.php
@@ -23,13 +23,13 @@ class FooTypeBarExtension extends AbstractTypeExtension
 
     public function getAllowedOptionValues()
     {
-        return array(
-            'a_or_b' => array('c'),
-        );
+        return [
+            'a_or_b' => ['c'],
+        ];
     }
 
     public static function getExtendedTypes(): iterable
     {
-        return array(__NAMESPACE__.'\FooType');
+        return [__NAMESPACE__.'\FooType'];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBazExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBazExtension.php
index 1f722776e0..250c122f9c 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBazExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/FooTypeBazExtension.php
@@ -23,6 +23,6 @@ class FooTypeBazExtension extends AbstractTypeExtension
 
     public static function getExtendedTypes(): iterable
     {
-        return array(__NAMESPACE__.'\FooType');
+        return [__NAMESPACE__.'\FooType'];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/LazyChoiceTypeExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/LazyChoiceTypeExtension.php
index 66af47aa17..e25d84c8bd 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/LazyChoiceTypeExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/LazyChoiceTypeExtension.php
@@ -25,10 +25,10 @@ class LazyChoiceTypeExtension extends AbstractTypeExtension
     public function configureOptions(OptionsResolver $resolver)
     {
         $resolver->setDefault('choice_loader', new CallbackChoiceLoader(function () {
-            return array(
+            return [
                 'Lazy A' => 'lazy_a',
                 'Lazy B' => 'lazy_b',
-            );
+            ];
         }));
     }
 
@@ -37,6 +37,6 @@ class LazyChoiceTypeExtension extends AbstractTypeExtension
      */
     public static function getExtendedTypes(): iterable
     {
-        return array(self::$extendedType);
+        return [self::$extendedType];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php b/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
index 0173bae6f9..578db1242c 100644
--- a/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
+++ b/src/Symfony/Component/Form/Tests/Fixtures/TestExtension.php
@@ -18,9 +18,9 @@ use Symfony\Component\Form\FormTypeInterface;
 
 class TestExtension implements FormExtensionInterface
 {
-    private $types = array();
+    private $types = [];
 
-    private $extensions = array();
+    private $extensions = [];
 
     private $guesser;
 
@@ -48,7 +48,7 @@ class TestExtension implements FormExtensionInterface
     {
         foreach ($extension::getExtendedTypes() as $type) {
             if (!isset($this->extensions[$type])) {
-                $this->extensions[$type] = array();
+                $this->extensions[$type] = [];
             }
 
             $this->extensions[$type][] = $extension;
@@ -57,7 +57,7 @@ class TestExtension implements FormExtensionInterface
 
     public function getTypeExtensions($name)
     {
-        return isset($this->extensions[$name]) ? $this->extensions[$name] : array();
+        return isset($this->extensions[$name]) ? $this->extensions[$name] : [];
     }
 
     public function hasTypeExtensions($name)
diff --git a/src/Symfony/Component/Form/Tests/FormBuilderTest.php b/src/Symfony/Component/Form/Tests/FormBuilderTest.php
index d0adfb5508..4b60093a7b 100644
--- a/src/Symfony/Component/Form/Tests/FormBuilderTest.php
+++ b/src/Symfony/Component/Form/Tests/FormBuilderTest.php
@@ -70,7 +70,7 @@ class FormBuilderTest extends TestCase
 
     public function testAddIsFluent()
     {
-        $builder = $this->builder->add('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', array('bar' => 'baz'));
+        $builder = $this->builder->add('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', ['bar' => 'baz']);
         $this->assertSame($builder, $this->builder);
     }
 
@@ -117,7 +117,7 @@ class FormBuilderTest extends TestCase
 
         $children = $this->builder->all();
 
-        $this->assertSame(array('foo', 'bar', 'baz'), array_keys($children));
+        $this->assertSame(['foo', 'bar', 'baz'], array_keys($children));
     }
 
     public function testAddFormType()
@@ -153,7 +153,7 @@ class FormBuilderTest extends TestCase
     {
         $this->factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array())
+            ->with('foo', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [])
         ;
 
         $this->builder->create('foo');
@@ -183,7 +183,7 @@ class FormBuilderTest extends TestCase
     {
         $expectedType = 'Symfony\Component\Form\Extension\Core\Type\TextType';
         $expectedName = 'foo';
-        $expectedOptions = array('bar' => 'baz');
+        $expectedOptions = ['bar' => 'baz'];
 
         $this->factory->expects($this->once())
             ->method('createNamedBuilder')
@@ -199,7 +199,7 @@ class FormBuilderTest extends TestCase
     public function testGetGuessedType()
     {
         $expectedName = 'foo';
-        $expectedOptions = array('bar' => 'baz');
+        $expectedOptions = ['bar' => 'baz'];
 
         $this->factory->expects($this->once())
             ->method('createBuilderForProperty')
diff --git a/src/Symfony/Component/Form/Tests/FormConfigTest.php b/src/Symfony/Component/Form/Tests/FormConfigTest.php
index 0d21b83ab0..18dac5528f 100644
--- a/src/Symfony/Component/Form/Tests/FormConfigTest.php
+++ b/src/Symfony/Component/Form/Tests/FormConfigTest.php
@@ -21,48 +21,48 @@ class FormConfigTest extends TestCase
 {
     public function getHtml4Ids()
     {
-        return array(
-            array('z0'),
-            array('A0'),
-            array('A9'),
-            array('Z0'),
-            array('#', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array('a#', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array('a$', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array('a%', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array('a ', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array("a\t", 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array("a\n", 'Symfony\Component\Form\Exception\InvalidArgumentException'),
-            array('a-'),
-            array('a_'),
-            array('a:'),
+        return [
+            ['z0'],
+            ['A0'],
+            ['A9'],
+            ['Z0'],
+            ['#', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ['a#', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ['a$', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ['a%', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ['a ', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ["a\t", 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ["a\n", 'Symfony\Component\Form\Exception\InvalidArgumentException'],
+            ['a-'],
+            ['a_'],
+            ['a:'],
             // Periods are allowed by the HTML4 spec, but disallowed by us
             // because they break the generated property paths
-            array('a.', 'Symfony\Component\Form\Exception\InvalidArgumentException'),
+            ['a.', 'Symfony\Component\Form\Exception\InvalidArgumentException'],
             // Contrary to the HTML4 spec, we allow names starting with a
             // number, otherwise naming fields by collection indices is not
             // possible.
             // For root forms, leading digits will be stripped from the
             // "id" attribute to produce valid HTML4.
-            array('0'),
-            array('9'),
+            ['0'],
+            ['9'],
             // Contrary to the HTML4 spec, we allow names starting with an
             // underscore, since this is already a widely used practice in
             // Symfony.
             // For root forms, leading underscores will be stripped from the
             // "id" attribute to produce valid HTML4.
-            array('_'),
+            ['_'],
             // Integers are allowed
-            array(0),
-            array(123),
+            [0],
+            [123],
             // NULL is allowed
-            array(null),
+            [null],
             // Other types are not
-            array(1.23, 'Symfony\Component\Form\Exception\UnexpectedTypeException'),
-            array(5., 'Symfony\Component\Form\Exception\UnexpectedTypeException'),
-            array(true, 'Symfony\Component\Form\Exception\UnexpectedTypeException'),
-            array(new \stdClass(), 'Symfony\Component\Form\Exception\UnexpectedTypeException'),
-        );
+            [1.23, 'Symfony\Component\Form\Exception\UnexpectedTypeException'],
+            [5., 'Symfony\Component\Form\Exception\UnexpectedTypeException'],
+            [true, 'Symfony\Component\Form\Exception\UnexpectedTypeException'],
+            [new \stdClass(), 'Symfony\Component\Form\Exception\UnexpectedTypeException'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/FormErrorIteratorTest.php b/src/Symfony/Component/Form/Tests/FormErrorIteratorTest.php
index 04eddd1c32..4ed30414f3 100644
--- a/src/Symfony/Component/Form/Tests/FormErrorIteratorTest.php
+++ b/src/Symfony/Component/Form/Tests/FormErrorIteratorTest.php
@@ -34,17 +34,17 @@ class FormErrorIteratorTest extends TestCase
             null,
             new EventDispatcher(),
             $this->getMockBuilder('Symfony\Component\Form\FormFactoryInterface')->getMock(),
-            array()
+            []
         );
 
         $form = $formBuilder->getForm();
 
-        $cause = new ConstraintViolation('Error 1!', null, array(), null, '', null, null, 'code1');
-        $form->addError(new FormError('Error 1!', null, array(), null, $cause));
-        $cause = new ConstraintViolation('Error 2!', null, array(), null, '', null, null, 'code1');
-        $form->addError(new FormError('Error 2!', null, array(), null, $cause));
-        $cause = new ConstraintViolation('Error 3!', null, array(), null, '', null, null, 'code2');
-        $form->addError(new FormError('Error 3!', null, array(), null, $cause));
+        $cause = new ConstraintViolation('Error 1!', null, [], null, '', null, null, 'code1');
+        $form->addError(new FormError('Error 1!', null, [], null, $cause));
+        $cause = new ConstraintViolation('Error 2!', null, [], null, '', null, null, 'code1');
+        $form->addError(new FormError('Error 2!', null, [], null, $cause));
+        $cause = new ConstraintViolation('Error 3!', null, [], null, '', null, null, 'code2');
+        $form->addError(new FormError('Error 3!', null, [], null, $cause));
         $formErrors = $form->getErrors();
 
         $specificFormErrors = $formErrors->findByCodes($code);
@@ -54,10 +54,10 @@ class FormErrorIteratorTest extends TestCase
 
     public function findByCodesProvider()
     {
-        return array(
-            array('code1', 2),
-            array(array('code1', 'code2'), 3),
-            array('code3', 0),
-        );
+        return [
+            ['code1', 2],
+            [['code1', 'code2'], 3],
+            ['code3', 0],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/FormFactoryTest.php b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
index ce65e05bb1..27a5ca6e20 100644
--- a/src/Symfony/Component/Form/Tests/FormFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
@@ -58,16 +58,16 @@ class FormFactoryTest extends TestCase
 
         $this->registry->expects($this->any())
             ->method('getTypeGuesser')
-            ->will($this->returnValue(new FormTypeGuesserChain(array(
+            ->will($this->returnValue(new FormTypeGuesserChain([
                 $this->guesser1,
                 $this->guesser2,
-            ))));
+            ])));
     }
 
     public function testCreateNamedBuilderWithTypeName()
     {
-        $options = array('a' => '1', 'b' => '2');
-        $resolvedOptions = array('a' => '2', 'b' => '3');
+        $options = ['a' => '1', 'b' => '2'];
+        $resolvedOptions = ['a' => '2', 'b' => '3'];
         $resolvedType = $this->getMockResolvedType();
 
         $this->registry->expects($this->once())
@@ -93,9 +93,9 @@ class FormFactoryTest extends TestCase
 
     public function testCreateNamedBuilderFillsDataOption()
     {
-        $givenOptions = array('a' => '1', 'b' => '2');
-        $expectedOptions = array_merge($givenOptions, array('data' => 'DATA'));
-        $resolvedOptions = array('a' => '2', 'b' => '3', 'data' => 'DATA');
+        $givenOptions = ['a' => '1', 'b' => '2'];
+        $expectedOptions = array_merge($givenOptions, ['data' => 'DATA']);
+        $resolvedOptions = ['a' => '2', 'b' => '3', 'data' => 'DATA'];
         $resolvedType = $this->getMockResolvedType();
 
         $this->registry->expects($this->once())
@@ -121,8 +121,8 @@ class FormFactoryTest extends TestCase
 
     public function testCreateNamedBuilderDoesNotOverrideExistingDataOption()
     {
-        $options = array('a' => '1', 'b' => '2', 'data' => 'CUSTOM');
-        $resolvedOptions = array('a' => '2', 'b' => '3', 'data' => 'CUSTOM');
+        $options = ['a' => '1', 'b' => '2', 'data' => 'CUSTOM'];
+        $resolvedOptions = ['a' => '2', 'b' => '3', 'data' => 'CUSTOM'];
         $resolvedType = $this->getMockResolvedType();
 
         $this->registry->expects($this->once())
@@ -166,8 +166,8 @@ class FormFactoryTest extends TestCase
 
     public function testCreateUsesBlockPrefixIfTypeGivenAsString()
     {
-        $options = array('a' => '1', 'b' => '2');
-        $resolvedOptions = array('a' => '2', 'b' => '3');
+        $options = ['a' => '1', 'b' => '2'];
+        $resolvedOptions = ['a' => '2', 'b' => '3'];
 
         // the interface does not have the method, so use the real class
         $resolvedType = $this->getMockBuilder('Symfony\Component\Form\ResolvedFormType')
@@ -205,8 +205,8 @@ class FormFactoryTest extends TestCase
 
     public function testCreateNamed()
     {
-        $options = array('a' => '1', 'b' => '2');
-        $resolvedOptions = array('a' => '2', 'b' => '3');
+        $options = ['a' => '1', 'b' => '2'];
+        $resolvedOptions = ['a' => '2', 'b' => '3'];
         $resolvedType = $this->getMockResolvedType();
 
         $this->registry->expects($this->once())
@@ -238,13 +238,13 @@ class FormFactoryTest extends TestCase
     {
         $registry = $this->getMockBuilder('Symfony\Component\Form\FormRegistryInterface')->getMock();
         $factory = $this->getMockBuilder('Symfony\Component\Form\FormFactory')
-            ->setMethods(array('createNamedBuilder'))
-            ->setConstructorArgs(array($registry))
+            ->setMethods(['createNamedBuilder'])
+            ->setConstructorArgs([$registry])
             ->getMock();
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array())
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, [])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty('Application\Author', 'firstName');
@@ -259,7 +259,7 @@ class FormFactoryTest extends TestCase
             ->with('Application\Author', 'firstName')
             ->will($this->returnValue(new TypeGuess(
                 'Symfony\Component\Form\Extension\Core\Type\TextType',
-                array('attr' => array('maxlength' => 10)),
+                ['attr' => ['maxlength' => 10]],
                 Guess::MEDIUM_CONFIDENCE
             )));
 
@@ -268,15 +268,15 @@ class FormFactoryTest extends TestCase
             ->with('Application\Author', 'firstName')
             ->will($this->returnValue(new TypeGuess(
                 'Symfony\Component\Form\Extension\Core\Type\PasswordType',
-                array('attr' => array('maxlength' => 7)),
+                ['attr' => ['maxlength' => 7]],
                 Guess::HIGH_CONFIDENCE
             )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, array('attr' => array('maxlength' => 7)))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\PasswordType', null, ['attr' => ['maxlength' => 7]])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty('Application\Author', 'firstName');
@@ -291,7 +291,7 @@ class FormFactoryTest extends TestCase
             ->with('Application\Author', 'firstName')
             ->will($this->returnValue(null));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
@@ -310,22 +310,22 @@ class FormFactoryTest extends TestCase
             ->with('Application\Author', 'firstName')
             ->will($this->returnValue(new TypeGuess(
                 'Symfony\Component\Form\Extension\Core\Type\TextType',
-                array('attr' => array('class' => 'foo', 'maxlength' => 10)),
+                ['attr' => ['class' => 'foo', 'maxlength' => 10]],
                 Guess::MEDIUM_CONFIDENCE
             )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('class' => 'foo', 'maxlength' => 11)))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, ['attr' => ['class' => 'foo', 'maxlength' => 11]])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(
             'Application\Author',
             'firstName',
             null,
-            array('attr' => array('maxlength' => 11))
+            ['attr' => ['maxlength' => 11]]
         );
 
         $this->assertEquals('builderInstance', $this->builder);
@@ -349,11 +349,11 @@ class FormFactoryTest extends TestCase
                     Guess::HIGH_CONFIDENCE
                 )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('maxlength' => 20)))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, ['attr' => ['maxlength' => 20]])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(
@@ -382,18 +382,18 @@ class FormFactoryTest extends TestCase
                 Guess::HIGH_CONFIDENCE
             )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('maxlength' => 20, 'pattern' => '.{5,}', 'class' => 'tinymce')))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, ['attr' => ['maxlength' => 20, 'pattern' => '.{5,}', 'class' => 'tinymce']])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(
             'Application\Author',
             'firstName',
             null,
-            array('attr' => array('class' => 'tinymce'))
+            ['attr' => ['class' => 'tinymce']]
         );
 
         $this->assertEquals('builderInstance', $this->builder);
@@ -417,11 +417,11 @@ class FormFactoryTest extends TestCase
                     Guess::HIGH_CONFIDENCE
                 )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('required' => false))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, ['required' => false])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(
@@ -450,11 +450,11 @@ class FormFactoryTest extends TestCase
                     Guess::HIGH_CONFIDENCE
                 )));
 
-        $factory = $this->getMockFactory(array('createNamedBuilder'));
+        $factory = $this->getMockFactory(['createNamedBuilder']);
 
         $factory->expects($this->once())
             ->method('createNamedBuilder')
-            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, array('attr' => array('pattern' => '[a-zA-Z]')))
+            ->with('firstName', 'Symfony\Component\Form\Extension\Core\Type\TextType', null, ['attr' => ['pattern' => '[a-zA-Z]']])
             ->will($this->returnValue('builderInstance'));
 
         $this->builder = $factory->createBuilderForProperty(
@@ -465,11 +465,11 @@ class FormFactoryTest extends TestCase
         $this->assertEquals('builderInstance', $this->builder);
     }
 
-    private function getMockFactory(array $methods = array())
+    private function getMockFactory(array $methods = [])
     {
         return $this->getMockBuilder('Symfony\Component\Form\FormFactory')
             ->setMethods($methods)
-            ->setConstructorArgs(array($this->registry))
+            ->setConstructorArgs([$this->registry])
             ->getMock();
     }
 
diff --git a/src/Symfony/Component/Form/Tests/FormRegistryTest.php b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
index ca38c7a8b2..e4dee5da8a 100644
--- a/src/Symfony/Component/Form/Tests/FormRegistryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormRegistryTest.php
@@ -68,10 +68,10 @@ class FormRegistryTest extends TestCase
         $this->guesser2 = $this->getMockBuilder('Symfony\Component\Form\FormTypeGuesserInterface')->getMock();
         $this->extension1 = new TestExtension($this->guesser1);
         $this->extension2 = new TestExtension($this->guesser2);
-        $this->registry = new FormRegistry(array(
+        $this->registry = new FormRegistry([
             $this->extension1,
             $this->extension2,
-        ), $this->resolvedTypeFactory);
+        ], $this->resolvedTypeFactory);
     }
 
     public function testGetTypeFromExtension()
@@ -123,7 +123,7 @@ class FormRegistryTest extends TestCase
         $type = new FooType();
         $ext1 = new FooTypeBarExtension();
         $ext2 = new FooTypeBazExtension();
-        $resolvedType = new ResolvedFormType($type, array($ext1, $ext2));
+        $resolvedType = new ResolvedFormType($type, [$ext1, $ext2]);
 
         $this->extension2->addType($type);
         $this->extension1->addTypeExtension($ext1);
@@ -131,7 +131,7 @@ class FormRegistryTest extends TestCase
 
         $this->resolvedTypeFactory->expects($this->once())
             ->method('createResolvedType')
-            ->with($type, array($ext1, $ext2))
+            ->with($type, [$ext1, $ext2])
             ->willReturn($resolvedType);
 
         $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
@@ -154,7 +154,7 @@ class FormRegistryTest extends TestCase
 
         $this->resolvedTypeFactory->expects($this->at(1))
             ->method('createResolvedType')
-            ->with($type, array(), $parentResolvedType)
+            ->with($type, [], $parentResolvedType)
             ->willReturn($resolvedType);
 
         $this->assertSame($resolvedType, $this->registry->getType(\get_class($type)));
@@ -230,12 +230,12 @@ class FormRegistryTest extends TestCase
 
     public function testGetTypeGuesser()
     {
-        $expectedGuesser = new FormTypeGuesserChain(array($this->guesser1, $this->guesser2));
+        $expectedGuesser = new FormTypeGuesserChain([$this->guesser1, $this->guesser2]);
 
         $this->assertEquals($expectedGuesser, $this->registry->getTypeGuesser());
 
         $registry = new FormRegistry(
-            array($this->getMockBuilder('Symfony\Component\Form\FormExtensionInterface')->getMock()),
+            [$this->getMockBuilder('Symfony\Component\Form\FormExtensionInterface')->getMock()],
             $this->resolvedTypeFactory
         );
 
@@ -244,7 +244,7 @@ class FormRegistryTest extends TestCase
 
     public function testGetExtensions()
     {
-        $expectedExtensions = array($this->extension1, $this->extension2);
+        $expectedExtensions = [$this->extension1, $this->extension2];
 
         $this->assertEquals($expectedExtensions, $this->registry->getExtensions());
     }
diff --git a/src/Symfony/Component/Form/Tests/Guess/GuessTest.php b/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
index 8f7e1d0203..eea423bb9d 100644
--- a/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
+++ b/src/Symfony/Component/Form/Tests/Guess/GuessTest.php
@@ -26,7 +26,7 @@ class GuessTest extends TestCase
         $guess2 = new TestGuess(Guess::LOW_CONFIDENCE);
         $guess3 = new TestGuess(Guess::HIGH_CONFIDENCE);
 
-        $this->assertSame($guess3, Guess::getBestGuess(array($guess1, $guess2, $guess3)));
+        $this->assertSame($guess3, Guess::getBestGuess([$guess1, $guess2, $guess3]));
     }
 
     /**
diff --git a/src/Symfony/Component/Form/Tests/NativeRequestHandlerTest.php b/src/Symfony/Component/Form/Tests/NativeRequestHandlerTest.php
index aba417288a..db4902e34b 100644
--- a/src/Symfony/Component/Form/Tests/NativeRequestHandlerTest.php
+++ b/src/Symfony/Component/Form/Tests/NativeRequestHandlerTest.php
@@ -29,22 +29,22 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         parent::setUp();
 
-        $_GET = array();
-        $_POST = array();
-        $_FILES = array();
-        $_SERVER = array(
+        $_GET = [];
+        $_POST = [];
+        $_FILES = [];
+        $_SERVER = [
             // PHPUnit needs this entry
             'SCRIPT_NAME' => self::$serverBackup['SCRIPT_NAME'],
-        );
+        ];
     }
 
     protected function tearDown()
     {
         parent::tearDown();
 
-        $_GET = array();
-        $_POST = array();
-        $_FILES = array();
+        $_GET = [];
+        $_POST = [];
+        $_FILES = [];
         $_SERVER = self::$serverBackup;
     }
 
@@ -60,9 +60,9 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         $form = $this->getMockForm('param1', 'PUT');
 
-        $this->setRequestData('POST', array(
+        $this->setRequestData('POST', [
             'param1' => 'DATA',
-        ));
+        ]);
 
         $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] = 'PUT';
 
@@ -77,13 +77,13 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         $form = $this->getMockForm('param1', 'POST', false);
 
-        $this->setRequestData('POST', array(), array('param1' => array(
+        $this->setRequestData('POST', [], ['param1' => [
             'name' => '',
             'type' => '',
             'tmp_name' => '',
             'error' => UPLOAD_ERR_NO_FILE,
             'size' => 0,
-        )));
+        ]]);
 
         $form->expects($this->once())
             ->method('submit')
@@ -96,35 +96,35 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         $form = $this->getMockForm('param1', 'POST', false);
 
-        $this->setRequestData('POST', array(), array('param1' => array(
-            'name' => array(
+        $this->setRequestData('POST', [], ['param1' => [
+            'name' => [
                 'field' => 'upload.txt',
-            ),
-            'type' => array(
+            ],
+            'type' => [
                 'field' => 'text/plain',
-            ),
-            'tmp_name' => array(
+            ],
+            'tmp_name' => [
                 'field' => 'owfdskjasdfsa',
-            ),
-            'error' => array(
+            ],
+            'error' => [
                 'field' => UPLOAD_ERR_OK,
-            ),
-            'size' => array(
+            ],
+            'size' => [
                 'field' => 100,
-            ),
-        )));
+            ],
+        ]]);
 
         $form->expects($this->once())
             ->method('submit')
-            ->with(array(
-                'field' => array(
+            ->with([
+                'field' => [
                     'name' => 'upload.txt',
                     'type' => 'text/plain',
                     'tmp_name' => 'owfdskjasdfsa',
                     'error' => UPLOAD_ERR_OK,
                     'size' => 100,
-                ),
-            ));
+                ],
+            ]);
 
         $this->requestHandler->handleRequest($form, $this->request);
     }
@@ -133,37 +133,37 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         $form = $this->getMockForm('param1', 'POST');
 
-        $this->setRequestData('POST', array(), array('param1' => array(
-            'name' => array(
-                'field' => array('subfield' => 'upload.txt'),
-            ),
-            'type' => array(
-                'field' => array('subfield' => 'text/plain'),
-            ),
-            'tmp_name' => array(
-                'field' => array('subfield' => 'owfdskjasdfsa'),
-            ),
-            'error' => array(
-                'field' => array('subfield' => UPLOAD_ERR_OK),
-            ),
-            'size' => array(
-                'field' => array('subfield' => 100),
-            ),
-        )));
+        $this->setRequestData('POST', [], ['param1' => [
+            'name' => [
+                'field' => ['subfield' => 'upload.txt'],
+            ],
+            'type' => [
+                'field' => ['subfield' => 'text/plain'],
+            ],
+            'tmp_name' => [
+                'field' => ['subfield' => 'owfdskjasdfsa'],
+            ],
+            'error' => [
+                'field' => ['subfield' => UPLOAD_ERR_OK],
+            ],
+            'size' => [
+                'field' => ['subfield' => 100],
+            ],
+        ]]);
 
         $form->expects($this->once())
             ->method('submit')
-            ->with(array(
-                'field' => array(
-                    'subfield' => array(
+            ->with([
+                'field' => [
+                    'subfield' => [
                         'name' => 'upload.txt',
                         'type' => 'text/plain',
                         'tmp_name' => 'owfdskjasdfsa',
                         'error' => UPLOAD_ERR_OK,
                         'size' => 100,
-                    ),
-                ),
-            ));
+                    ],
+                ],
+            ]);
 
         $this->requestHandler->handleRequest($form, $this->request);
     }
@@ -172,9 +172,9 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
     {
         $form = $this->getMockForm('param1', 'POST');
 
-        $this->setRequestData('GET', array(
+        $this->setRequestData('GET', [
                 'param1' => 'DATA',
-            ));
+            ]);
 
         $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] = 'PUT';
 
@@ -184,21 +184,21 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
         $this->requestHandler->handleRequest($form, $this->request);
     }
 
-    protected function setRequestData($method, $data, $files = array())
+    protected function setRequestData($method, $data, $files = [])
     {
         if ('GET' === $method) {
             $_GET = $data;
-            $_FILES = array();
+            $_FILES = [];
         } else {
             $_POST = $data;
             $_FILES = $files;
         }
 
-        $_SERVER = array(
+        $_SERVER = [
             'REQUEST_METHOD' => $method,
             // PHPUnit needs this entry
             'SCRIPT_NAME' => self::$serverBackup['SCRIPT_NAME'],
-        );
+        ];
     }
 
     protected function getRequestHandler()
@@ -208,23 +208,23 @@ class NativeRequestHandlerTest extends AbstractRequestHandlerTest
 
     protected function getMockFile($suffix = '')
     {
-        return array(
+        return [
             'name' => 'upload'.$suffix.'.txt',
             'type' => 'text/plain',
             'tmp_name' => 'owfdskjasdfsa'.$suffix,
             'error' => UPLOAD_ERR_OK,
             'size' => 100,
-        );
+        ];
     }
 
     protected function getInvalidFile()
     {
-        return array(
+        return [
             'name' => 'upload.txt',
             'type' => 'text/plain',
             'tmp_name' => 'owfdskjasdfsa',
             'error' => '0',
             'size' => '100',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php b/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
index ca9ec14252..ff3e2cb87d 100644
--- a/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/ResolvedFormTypeTest.php
@@ -78,7 +78,7 @@ class ResolvedFormTypeTest extends TestCase
         $this->extension1 = $this->getMockFormTypeExtension();
         $this->extension2 = $this->getMockFormTypeExtension();
         $this->parentResolvedType = new ResolvedFormType($this->parentType);
-        $this->resolvedType = new ResolvedFormType($this->type, array($this->extension1, $this->extension2), $this->parentResolvedType);
+        $this->resolvedType = new ResolvedFormType($this->type, [$this->extension1, $this->extension2], $this->parentResolvedType);
     }
 
     public function testGetOptionsResolver()
@@ -91,7 +91,7 @@ class ResolvedFormTypeTest extends TestCase
 
                 ++$i;
 
-                $resolver->setDefaults(array($option => $default));
+                $resolver->setDefaults([$option => $default]);
             };
         };
 
@@ -114,8 +114,8 @@ class ResolvedFormTypeTest extends TestCase
             ->method('configureOptions')
             ->will($this->returnCallback($assertIndexAndAddOption(3, 'd', 'd_default')));
 
-        $givenOptions = array('a' => 'a_custom', 'c' => 'c_custom');
-        $resolvedOptions = array('a' => 'a_custom', 'b' => 'b_default', 'c' => 'c_custom', 'd' => 'd_default');
+        $givenOptions = ['a' => 'a_custom', 'c' => 'c_custom'];
+        $resolvedOptions = ['a' => 'a_custom', 'b' => 'b_default', 'c' => 'c_custom', 'd' => 'd_default'];
 
         $resolver = $this->resolvedType->getOptionsResolver();
 
@@ -124,13 +124,13 @@ class ResolvedFormTypeTest extends TestCase
 
     public function testCreateBuilder()
     {
-        $givenOptions = array('a' => 'a_custom', 'c' => 'c_custom');
-        $resolvedOptions = array('a' => 'a_custom', 'b' => 'b_default', 'c' => 'c_custom', 'd' => 'd_default');
+        $givenOptions = ['a' => 'a_custom', 'c' => 'c_custom'];
+        $resolvedOptions = ['a' => 'a_custom', 'b' => 'b_default', 'c' => 'c_custom', 'd' => 'd_default'];
         $optionsResolver = $this->getMockBuilder('Symfony\Component\OptionsResolver\OptionsResolver')->getMock();
 
         $this->resolvedType = $this->getMockBuilder('Symfony\Component\Form\ResolvedFormType')
-            ->setConstructorArgs(array($this->type, array($this->extension1, $this->extension2), $this->parentResolvedType))
-            ->setMethods(array('getOptionsResolver'))
+            ->setConstructorArgs([$this->type, [$this->extension1, $this->extension2], $this->parentResolvedType])
+            ->setMethods(['getOptionsResolver'])
             ->getMock();
 
         $this->resolvedType->expects($this->once())
@@ -152,13 +152,13 @@ class ResolvedFormTypeTest extends TestCase
 
     public function testCreateBuilderWithDataClassOption()
     {
-        $givenOptions = array('data_class' => 'Foo');
-        $resolvedOptions = array('data_class' => '\stdClass');
+        $givenOptions = ['data_class' => 'Foo'];
+        $resolvedOptions = ['data_class' => '\stdClass'];
         $optionsResolver = $this->getMockBuilder('Symfony\Component\OptionsResolver\OptionsResolver')->getMock();
 
         $this->resolvedType = $this->getMockBuilder('Symfony\Component\Form\ResolvedFormType')
-            ->setConstructorArgs(array($this->type, array($this->extension1, $this->extension2), $this->parentResolvedType))
-            ->setMethods(array('getOptionsResolver'))
+            ->setConstructorArgs([$this->type, [$this->extension1, $this->extension2], $this->parentResolvedType])
+            ->setMethods(['getOptionsResolver'])
             ->getMock();
 
         $this->resolvedType->expects($this->once())
@@ -190,7 +190,7 @@ class ResolvedFormTypeTest extends TestCase
             };
         };
 
-        $options = array('a' => 'Foo', 'b' => 'Bar');
+        $options = ['a' => 'Foo', 'b' => 'Bar'];
         $builder = $this->getMockBuilder('Symfony\Component\Form\Test\FormBuilderInterface')->getMock();
 
         // First the form is built for the super type
@@ -242,7 +242,7 @@ class ResolvedFormTypeTest extends TestCase
 
     public function testBuildView()
     {
-        $options = array('a' => '1', 'b' => '2');
+        $options = ['a' => '1', 'b' => '2'];
         $form = $this->getMockBuilder('Symfony\Component\Form\Test\FormInterface')->getMock();
         $view = $this->getMockBuilder('Symfony\Component\Form\FormView')->getMock();
 
@@ -284,7 +284,7 @@ class ResolvedFormTypeTest extends TestCase
 
     public function testFinishView()
     {
-        $options = array('a' => '1', 'b' => '2');
+        $options = ['a' => '1', 'b' => '2'];
         $form = $this->getMockBuilder('Symfony\Component\Form\Test\FormInterface')->getMock();
         $view = $this->getMockBuilder('Symfony\Component\Form\FormView')->getMock();
 
@@ -347,14 +347,14 @@ class ResolvedFormTypeTest extends TestCase
 
     public function provideTypeClassBlockPrefixTuples()
     {
-        return array(
-            array(__NAMESPACE__.'\Fixtures\FooType', 'foo'),
-            array(__NAMESPACE__.'\Fixtures\Foo', 'foo'),
-            array(__NAMESPACE__.'\Fixtures\Type', 'type'),
-            array(__NAMESPACE__.'\Fixtures\FooBarHTMLType', 'foo_bar_html'),
-            array(__NAMESPACE__.'\Fixtures\Foo1Bar2Type', 'foo1_bar2'),
-            array(__NAMESPACE__.'\Fixtures\FBooType', 'f_boo'),
-        );
+        return [
+            [__NAMESPACE__.'\Fixtures\FooType', 'foo'],
+            [__NAMESPACE__.'\Fixtures\Foo', 'foo'],
+            [__NAMESPACE__.'\Fixtures\Type', 'type'],
+            [__NAMESPACE__.'\Fixtures\FooBarHTMLType', 'foo_bar_html'],
+            [__NAMESPACE__.'\Fixtures\Foo1Bar2Type', 'foo1_bar2'],
+            [__NAMESPACE__.'\Fixtures\FBooType', 'f_boo'],
+        ];
     }
 
     /**
@@ -362,7 +362,7 @@ class ResolvedFormTypeTest extends TestCase
      */
     private function getMockFormType($typeClass = 'Symfony\Component\Form\AbstractType')
     {
-        return $this->getMockBuilder($typeClass)->setMethods(array('getBlockPrefix', 'configureOptions', 'finishView', 'buildView', 'buildForm'))->getMock();
+        return $this->getMockBuilder($typeClass)->setMethods(['getBlockPrefix', 'configureOptions', 'finishView', 'buildView', 'buildForm'])->getMock();
     }
 
     /**
@@ -370,7 +370,7 @@ class ResolvedFormTypeTest extends TestCase
      */
     private function getMockFormTypeExtension()
     {
-        return $this->getMockBuilder('Symfony\Component\Form\AbstractTypeExtension')->setMethods(array('getExtendedType', 'configureOptions', 'finishView', 'buildView', 'buildForm'))->getMock();
+        return $this->getMockBuilder('Symfony\Component\Form\AbstractTypeExtension')->setMethods(['getExtendedType', 'configureOptions', 'finishView', 'buildView', 'buildForm'])->getMock();
     }
 
     /**
@@ -387,7 +387,7 @@ class ResolvedFormTypeTest extends TestCase
      *
      * @return FormBuilder
      */
-    protected function getBuilder($name = 'name', array $options = array())
+    protected function getBuilder($name = 'name', array $options = [])
     {
         return new FormBuilder($name, null, $this->dispatcher, $this->factory, $options);
     }
diff --git a/src/Symfony/Component/Form/Tests/SimpleFormTest.php b/src/Symfony/Component/Form/Tests/SimpleFormTest.php
index 0411411bdb..8c8ba33081 100644
--- a/src/Symfony/Component/Form/Tests/SimpleFormTest.php
+++ b/src/Symfony/Component/Form/Tests/SimpleFormTest.php
@@ -43,7 +43,7 @@ class SimpleFormTest_Traversable implements \IteratorAggregate
 
     public function __construct($count)
     {
-        $this->iterator = new \ArrayIterator($count > 0 ? array_fill(0, $count, 'Foo') : array());
+        $this->iterator = new \ArrayIterator($count > 0 ? array_fill(0, $count, 'Foo') : []);
     }
 
     public function getIterator()
@@ -56,12 +56,12 @@ class SimpleFormTest extends AbstractFormTest
 {
     public function testDataIsInitializedToConfiguredValue()
     {
-        $model = new FixedDataTransformer(array(
+        $model = new FixedDataTransformer([
             'default' => 'foo',
-        ));
-        $view = new FixedDataTransformer(array(
+        ]);
+        $view = new FixedDataTransformer([
             'foo' => 'bar',
-        ));
+        ]);
 
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
         $config->addViewTransformer($view);
@@ -80,12 +80,12 @@ class SimpleFormTest extends AbstractFormTest
      */
     public function testDataTransformationFailure()
     {
-        $model = new FixedDataTransformer(array(
+        $model = new FixedDataTransformer([
             'default' => 'foo',
-        ));
-        $view = new FixedDataTransformer(array(
+        ]);
+        $view = new FixedDataTransformer([
             'foo' => 'bar',
-        ));
+        ]);
 
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
         $config->addViewTransformer($view);
@@ -100,7 +100,7 @@ class SimpleFormTest extends AbstractFormTest
     public function testDataIsInitializedFromSubmit()
     {
         $mock = $this->getMockBuilder('\stdClass')
-            ->setMethods(array('preSetData', 'preSubmit'))
+            ->setMethods(['preSetData', 'preSubmit'])
             ->getMock();
         $mock->expects($this->at(0))
             ->method('preSetData');
@@ -108,8 +108,8 @@ class SimpleFormTest extends AbstractFormTest
             ->method('preSubmit');
 
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
-        $config->addEventListener(FormEvents::PRE_SET_DATA, array($mock, 'preSetData'));
-        $config->addEventListener(FormEvents::PRE_SUBMIT, array($mock, 'preSubmit'));
+        $config->addEventListener(FormEvents::PRE_SET_DATA, [$mock, 'preSetData']);
+        $config->addEventListener(FormEvents::PRE_SUBMIT, [$mock, 'preSubmit']);
         $form = new Form($config);
 
         // no call to setData() or similar where the object would be
@@ -122,7 +122,7 @@ class SimpleFormTest extends AbstractFormTest
     public function testFalseIsConvertedToNull()
     {
         $mock = $this->getMockBuilder('\stdClass')
-            ->setMethods(array('preSubmit'))
+            ->setMethods(['preSubmit'])
             ->getMock();
         $mock->expects($this->once())
             ->method('preSubmit')
@@ -131,7 +131,7 @@ class SimpleFormTest extends AbstractFormTest
             }));
 
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
-        $config->addEventListener(FormEvents::PRE_SUBMIT, array($mock, 'preSubmit'));
+        $config->addEventListener(FormEvents::PRE_SUBMIT, [$mock, 'preSubmit']);
         $form = new Form($config);
 
         $form->submit(false);
@@ -145,8 +145,8 @@ class SimpleFormTest extends AbstractFormTest
      */
     public function testSubmitThrowsExceptionIfAlreadySubmitted()
     {
-        $this->form->submit(array());
-        $this->form->submit(array());
+        $this->form->submit([]);
+        $this->form->submit([]);
     }
 
     public function testSubmitIsIgnoredIfDisabled()
@@ -207,13 +207,13 @@ class SimpleFormTest extends AbstractFormTest
 
     public function getDisabledStates()
     {
-        return array(
+        return [
             // parent, button, result
-            array(true, true, true),
-            array(true, false, true),
-            array(false, true, true),
-            array(false, false, false),
-        );
+            [true, true, true],
+            [true, false, true],
+            [false, true, true],
+            [false, false, false],
+        ];
     }
 
     public function testGetRootReturnsRootOfParent()
@@ -235,7 +235,7 @@ class SimpleFormTest extends AbstractFormTest
 
     public function testEmptyIfEmptyArray()
     {
-        $this->form->setData(array());
+        $this->form->setData([]);
 
         $this->assertTrue($this->form->isEmpty());
     }
@@ -339,7 +339,7 @@ class SimpleFormTest extends AbstractFormTest
      */
     public function testSetParentThrowsExceptionIfAlreadySubmitted()
     {
-        $this->form->submit(array());
+        $this->form->submit([]);
         $this->form->setParent($this->getBuilder('parent')->getForm());
     }
 
@@ -361,7 +361,7 @@ class SimpleFormTest extends AbstractFormTest
      */
     public function testSetDataThrowsExceptionIfAlreadySubmitted()
     {
-        $this->form->submit(array());
+        $this->form->submit([]);
         $this->form->setData(null);
     }
 
@@ -388,19 +388,19 @@ class SimpleFormTest extends AbstractFormTest
     {
         // use real event dispatcher now
         $form = $this->getBuilder('name', new EventDispatcher())
-            ->addEventSubscriber(new FixedFilterListener(array(
-                'preSetData' => array(
+            ->addEventSubscriber(new FixedFilterListener([
+                'preSetData' => [
                     'app' => 'filtered',
-                ),
-            )))
-            ->addModelTransformer(new FixedDataTransformer(array(
+                ],
+            ]))
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 'filtered' => 'norm',
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'norm' => 'client',
-            )))
+            ]))
             ->getForm();
 
         $form->setData('app');
@@ -413,14 +413,14 @@ class SimpleFormTest extends AbstractFormTest
     public function testSetDataExecutesViewTransformersInOrder()
     {
         $form = $this->getBuilder()
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'first' => 'second',
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'second' => 'third',
-            )))
+            ]))
             ->getForm();
 
         $form->setData('first');
@@ -431,14 +431,14 @@ class SimpleFormTest extends AbstractFormTest
     public function testSetDataExecutesModelTransformersInReverseOrder()
     {
         $form = $this->getBuilder()
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 'second' => 'third',
-            )))
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 'first' => 'second',
-            )))
+            ]))
             ->getForm();
 
         $form->setData('first');
@@ -468,10 +468,10 @@ class SimpleFormTest extends AbstractFormTest
     public function testSetDataConvertsScalarToStringIfOnlyModelTransformer()
     {
         $form = $this->getBuilder()
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
             '' => '',
             1 => 23,
-        )))
+        ]))
             ->getForm();
 
         $form->setData(1);
@@ -539,25 +539,25 @@ class SimpleFormTest extends AbstractFormTest
     {
         // use real event dispatcher now
         $form = $this->getBuilder('name', new EventDispatcher())
-            ->addEventSubscriber(new FixedFilterListener(array(
-                'preSubmit' => array(
+            ->addEventSubscriber(new FixedFilterListener([
+                'preSubmit' => [
                     'client' => 'filteredclient',
-                ),
-                'onSubmit' => array(
+                ],
+                'onSubmit' => [
                     'norm' => 'filterednorm',
-                ),
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+                ],
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 // direction is reversed!
                 'norm' => 'filteredclient',
                 'filterednorm' => 'cleanedclient',
-            )))
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 // direction is reversed!
                 'app' => 'filterednorm',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('client');
@@ -570,14 +570,14 @@ class SimpleFormTest extends AbstractFormTest
     public function testSubmitExecutesViewTransformersInReverseOrder()
     {
         $form = $this->getBuilder()
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'third' => 'second',
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 'second' => 'first',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('first');
@@ -588,14 +588,14 @@ class SimpleFormTest extends AbstractFormTest
     public function testSubmitExecutesModelTransformersInOrder()
     {
         $form = $this->getBuilder()
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 'second' => 'first',
-            )))
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addModelTransformer(new FixedDataTransformer([
                 '' => '',
                 'third' => 'second',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('first');
@@ -651,11 +651,11 @@ class SimpleFormTest extends AbstractFormTest
     {
         $form = $this->getBuilder()
             ->setEmptyData('foo')
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 // direction is reversed!
                 'bar' => 'foo',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('');
@@ -673,11 +673,11 @@ class SimpleFormTest extends AbstractFormTest
 
                 return 'foo';
             })
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ->addViewTransformer(new FixedDataTransformer([
                 '' => '',
                 // direction is reversed!
                 'bar' => 'foo',
-            )))
+            ]))
             ->getForm();
 
         $form->submit('');
@@ -844,10 +844,10 @@ class SimpleFormTest extends AbstractFormTest
     {
         $object = new \stdClass();
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
-        $config->addViewTransformer(new FixedDataTransformer(array(
+        $config->addViewTransformer(new FixedDataTransformer([
             '' => '',
             'foo' => $object,
-        )));
+        ]));
         $form = new Form($config);
 
         $form->setData('foo');
@@ -859,10 +859,10 @@ class SimpleFormTest extends AbstractFormTest
     {
         $arrayAccess = $this->getMockBuilder('\ArrayAccess')->getMock();
         $config = new FormConfigBuilder('name', null, $this->dispatcher);
-        $config->addViewTransformer(new FixedDataTransformer(array(
+        $config->addViewTransformer(new FixedDataTransformer([
             '' => '',
             'foo' => $arrayAccess,
-        )));
+        ]));
         $form = new Form($config);
 
         $form->setData('foo');
@@ -876,10 +876,10 @@ class SimpleFormTest extends AbstractFormTest
     public function testViewDataMustBeObjectIfDataClassIsSet()
     {
         $config = new FormConfigBuilder('name', 'stdClass', $this->dispatcher);
-        $config->addViewTransformer(new FixedDataTransformer(array(
+        $config->addViewTransformer(new FixedDataTransformer([
             '' => '',
-            'foo' => array('bar' => 'baz'),
-        )));
+            'foo' => ['bar' => 'baz'],
+        ]));
         $form = new Form($config);
 
         $form->setData('foo');
@@ -945,12 +945,12 @@ class SimpleFormTest extends AbstractFormTest
             ->setCompound(true)
             ->setDataMapper($this->getDataMapper())
             ->setData('foo')
-            ->addModelTransformer(new FixedDataTransformer(array(
+            ->addModelTransformer(new FixedDataTransformer([
                 'foo' => 'norm[foo]',
-            )))
-            ->addViewTransformer(new FixedDataTransformer(array(
+            ]))
+            ->addViewTransformer(new FixedDataTransformer([
                 'norm[foo]' => 'view[foo]',
-            )))
+            ]))
             ->add($child)
             ->getForm();
 
@@ -1037,7 +1037,7 @@ class SimpleFormTest extends AbstractFormTest
     public function testInitializeSetsDefaultData()
     {
         $config = $this->getBuilder()->setData('DEFAULT')->getFormConfig();
-        $form = $this->getMockBuilder('Symfony\Component\Form\Form')->setMethods(array('setData'))->setConstructorArgs(array($config))->getMock();
+        $form = $this->getMockBuilder('Symfony\Component\Form\Form')->setMethods(['setData'])->setConstructorArgs([$config])->getMock();
 
         $form->expects($this->once())
             ->method('setData')
diff --git a/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php b/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
index 8ce3f8fc82..01e76d87eb 100644
--- a/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
+++ b/src/Symfony/Component/Form/Tests/Util/OrderedHashMapTest.php
@@ -43,7 +43,7 @@ class OrderedHashMapTest extends TestCase
         $map['first'] = 1;
         $map['second'] = 2;
 
-        $this->assertSame(array('first' => 1, 'second' => 2), iterator_to_array($map));
+        $this->assertSame(['first' => 1, 'second' => 2], iterator_to_array($map));
     }
 
     public function testInsertNullKeys()
@@ -53,7 +53,7 @@ class OrderedHashMapTest extends TestCase
         $map['foo'] = 2;
         $map[] = 3;
 
-        $this->assertSame(array(0 => 1, 'foo' => 2, 1 => 3), iterator_to_array($map));
+        $this->assertSame([0 => 1, 'foo' => 2, 1 => 3], iterator_to_array($map));
     }
 
     public function testInsertLooselyEqualKeys()
@@ -62,7 +62,7 @@ class OrderedHashMapTest extends TestCase
         $map['1 as a string'] = '1 as a string';
         $map[1] = 1;
 
-        $this->assertSame(array('1 as a string' => '1 as a string', 1 => 1), iterator_to_array($map));
+        $this->assertSame(['1 as a string' => '1 as a string', 1 => 1], iterator_to_array($map));
     }
 
     /**
@@ -83,7 +83,7 @@ class OrderedHashMapTest extends TestCase
         $map['second'] = 2;
         $map['first'] = 1;
 
-        $this->assertSame(array('first' => 1, 'second' => 2), iterator_to_array($map));
+        $this->assertSame(['first' => 1, 'second' => 2], iterator_to_array($map));
     }
 
     public function testIsset()
@@ -117,7 +117,7 @@ class OrderedHashMapTest extends TestCase
 
         unset($map['first']);
 
-        $this->assertSame(array('second' => 2), iterator_to_array($map));
+        $this->assertSame(['second' => 2], iterator_to_array($map));
     }
 
     public function testUnsetFromLooselyEqualKeysHashMap()
@@ -128,7 +128,7 @@ class OrderedHashMapTest extends TestCase
 
         unset($map[1]);
 
-        $this->assertSame(array('1 as a string' => '1 as a string'), iterator_to_array($map));
+        $this->assertSame(['1 as a string' => '1 as a string'], iterator_to_array($map));
     }
 
     public function testUnsetNonExistingSucceeds()
@@ -138,7 +138,7 @@ class OrderedHashMapTest extends TestCase
 
         unset($map['first']);
 
-        $this->assertSame(array('second' => 2), iterator_to_array($map));
+        $this->assertSame(['second' => 2], iterator_to_array($map));
     }
 
     public function testEmptyIteration()
@@ -154,7 +154,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsInsertion()
     {
-        $map = new OrderedHashMap(array('first' => 1));
+        $map = new OrderedHashMap(['first' => 1]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -185,7 +185,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsDeletionAndInsertion()
     {
-        $map = new OrderedHashMap(array('first' => 1, 'removed' => 2));
+        $map = new OrderedHashMap(['first' => 1, 'removed' => 2]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -217,7 +217,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsDeletionOfCurrentElement()
     {
-        $map = new OrderedHashMap(array('removed' => 1, 'next' => 2));
+        $map = new OrderedHashMap(['removed' => 1, 'next' => 2]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -247,7 +247,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationIgnoresReplacementOfCurrentElement()
     {
-        $map = new OrderedHashMap(array('replaced' => 1, 'next' => 2));
+        $map = new OrderedHashMap(['replaced' => 1, 'next' => 2]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -277,7 +277,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsDeletionOfCurrentAndLastElement()
     {
-        $map = new OrderedHashMap(array('removed' => 1));
+        $map = new OrderedHashMap(['removed' => 1]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -301,7 +301,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationIgnoresReplacementOfCurrentAndLastElement()
     {
-        $map = new OrderedHashMap(array('replaced' => 1));
+        $map = new OrderedHashMap(['replaced' => 1]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -325,7 +325,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsDeletionOfPreviousElement()
     {
-        $map = new OrderedHashMap(array('removed' => 1, 'next' => 2, 'onemore' => 3));
+        $map = new OrderedHashMap(['removed' => 1, 'next' => 2, 'onemore' => 3]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -361,7 +361,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationIgnoresReplacementOfPreviousElement()
     {
-        $map = new OrderedHashMap(array('replaced' => 1, 'next' => 2, 'onemore' => 3));
+        $map = new OrderedHashMap(['replaced' => 1, 'next' => 2, 'onemore' => 3]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -397,7 +397,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testIterationSupportsDeletionOfMultiplePreviousElements()
     {
-        $map = new OrderedHashMap(array('removed' => 1, 'alsoremoved' => 2, 'next' => 3, 'onemore' => 4));
+        $map = new OrderedHashMap(['removed' => 1, 'alsoremoved' => 2, 'next' => 3, 'onemore' => 4]);
         $it = $map->getIterator();
 
         $it->rewind();
@@ -439,7 +439,7 @@ class OrderedHashMapTest extends TestCase
 
     public function testParallelIteration()
     {
-        $map = new OrderedHashMap(array('first' => 1, 'second' => 2));
+        $map = new OrderedHashMap(['first' => 1, 'second' => 2]);
         $it1 = $map->getIterator();
         $it2 = $map->getIterator();
 
diff --git a/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php b/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
index 86c68ba331..755b842e61 100644
--- a/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
+++ b/src/Symfony/Component/Form/Tests/Util/StringUtilTest.php
@@ -42,38 +42,38 @@ class StringUtilTest extends TestCase
 
     public function spaceProvider()
     {
-        return array(
+        return [
             // separators
-            array('0020'),
-            array('00A0'),
-            array('1680'),
-//            array('180E'),
-            array('2000'),
-            array('2001'),
-            array('2002'),
-            array('2003'),
-            array('2004'),
-            array('2005'),
-            array('2006'),
-            array('2007'),
-            array('2008'),
-            array('2009'),
-            array('200A'),
-            array('2028'),
-            array('2029'),
-            array('202F'),
-            array('205F'),
-            array('3000'),
+            ['0020'],
+            ['00A0'],
+            ['1680'],
+//            ['180E'],
+            ['2000'],
+            ['2001'],
+            ['2002'],
+            ['2003'],
+            ['2004'],
+            ['2005'],
+            ['2006'],
+            ['2007'],
+            ['2008'],
+            ['2009'],
+            ['200A'],
+            ['2028'],
+            ['2029'],
+            ['202F'],
+            ['205F'],
+            ['3000'],
             // controls
-            array('0009'),
-            array('000A'),
-            array('000B'),
-            array('000C'),
-            array('000D'),
-            array('0085'),
+            ['0009'],
+            ['000A'],
+            ['000B'],
+            ['000C'],
+            ['000D'],
+            ['0085'],
             // zero width space
-//            array('200B'),
-        );
+//            ['200B'],
+        ];
     }
 
     /**
@@ -88,18 +88,18 @@ class StringUtilTest extends TestCase
 
     public function fqcnToBlockPrefixProvider()
     {
-        return array(
-            array('TYPE', 'type'),
-            array('\Type', 'type'),
-            array('\UserType', 'user'),
-            array('UserType', 'user'),
-            array('Vendor\Name\Space\Type', 'type'),
-            array('Vendor\Name\Space\UserForm', 'user_form'),
-            array('Vendor\Name\Space\UserType', 'user'),
-            array('Vendor\Name\Space\usertype', 'user'),
-            array('Symfony\Component\Form\Form', 'form'),
-            array('Vendor\Name\Space\BarTypeBazType', 'bar_type_baz'),
-            array('FooBarBazType', 'foo_bar_baz'),
-        );
+        return [
+            ['TYPE', 'type'],
+            ['\Type', 'type'],
+            ['\UserType', 'user'],
+            ['UserType', 'user'],
+            ['Vendor\Name\Space\Type', 'type'],
+            ['Vendor\Name\Space\UserForm', 'user_form'],
+            ['Vendor\Name\Space\UserType', 'user'],
+            ['Vendor\Name\Space\usertype', 'user'],
+            ['Symfony\Component\Form\Form', 'form'],
+            ['Vendor\Name\Space\BarTypeBazType', 'bar_type_baz'],
+            ['FooBarBazType', 'foo_bar_baz'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Form/Util/FormUtil.php b/src/Symfony/Component/Form/Util/FormUtil.php
index 53053f9d5b..fed96de4fa 100644
--- a/src/Symfony/Component/Form/Util/FormUtil.php
+++ b/src/Symfony/Component/Form/Util/FormUtil.php
@@ -36,7 +36,7 @@ class FormUtil
      */
     public static function isEmpty($data)
     {
-        // Should not do a check for array() === $data!!!
+        // Should not do a check for [] === $data!!!
         // This method is used in occurrences where arrays are
         // not considered to be empty, ever.
         return null === $data || '' === $data;
diff --git a/src/Symfony/Component/Form/Util/OptionsResolverWrapper.php b/src/Symfony/Component/Form/Util/OptionsResolverWrapper.php
index 94a4fc111a..a7c2647592 100644
--- a/src/Symfony/Component/Form/Util/OptionsResolverWrapper.php
+++ b/src/Symfony/Component/Form/Util/OptionsResolverWrapper.php
@@ -22,7 +22,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
  */
 class OptionsResolverWrapper extends OptionsResolver
 {
-    private $undefined = array();
+    private $undefined = [];
 
     public function setNormalizer($option, \Closure $normalizer)
     {
@@ -79,7 +79,7 @@ class OptionsResolverWrapper extends OptionsResolver
         return $this;
     }
 
-    public function resolve(array $options = array())
+    public function resolve(array $options = [])
     {
         throw new AccessException('Resolve options is not supported.');
     }
diff --git a/src/Symfony/Component/Form/Util/OrderedHashMap.php b/src/Symfony/Component/Form/Util/OrderedHashMap.php
index 26e45a4622..19ec4fc7d2 100644
--- a/src/Symfony/Component/Form/Util/OrderedHashMap.php
+++ b/src/Symfony/Component/Form/Util/OrderedHashMap.php
@@ -71,28 +71,28 @@ class OrderedHashMap implements \ArrayAccess, \IteratorAggregate, \Countable
      *
      * @var array
      */
-    private $elements = array();
+    private $elements = [];
 
     /**
      * The keys of the map in the order in which they were inserted or changed.
      *
      * @var array
      */
-    private $orderedKeys = array();
+    private $orderedKeys = [];
 
     /**
      * References to the cursors of all open iterators.
      *
      * @var array
      */
-    private $managedCursors = array();
+    private $managedCursors = [];
 
     /**
      * Creates a new map.
      *
      * @param array $elements The elements to insert initially
      */
-    public function __construct(array $elements = array())
+    public function __construct(array $elements = [])
     {
         $this->elements = $elements;
         $this->orderedKeys = array_keys($elements);
@@ -125,7 +125,7 @@ class OrderedHashMap implements \ArrayAccess, \IteratorAggregate, \Countable
     {
         if (null === $key || !isset($this->elements[$key])) {
             if (null === $key) {
-                $key = array() === $this->orderedKeys
+                $key = [] === $this->orderedKeys
                     // If the array is empty, use 0 as key
                     ? 0
                     // Imitate PHP behavior of generating a key that equals
diff --git a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
index 93a7caa58d..c34bf2e39b 100644
--- a/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
+++ b/src/Symfony/Component/Form/Util/OrderedHashMapIterator.php
@@ -120,7 +120,7 @@ class OrderedHashMapIterator implements \Iterator
             return null;
         }
 
-        $array = array($this->key => null);
+        $array = [$this->key => null];
 
         return key($array);
     }
diff --git a/src/Symfony/Component/Form/Util/StringUtil.php b/src/Symfony/Component/Form/Util/StringUtil.php
index ee71ae7a52..241a66810b 100644
--- a/src/Symfony/Component/Form/Util/StringUtil.php
+++ b/src/Symfony/Component/Form/Util/StringUtil.php
@@ -51,7 +51,7 @@ class StringUtil
     {
         // Non-greedy ("+?") to match "type" suffix, if present
         if (preg_match('~([^\\\\]+?)(type)?$~i', $fqcn, $matches)) {
-            return strtolower(preg_replace(array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'), array('\\1_\\2', '\\1_\\2'), $matches[1]));
+            return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], $matches[1]));
         }
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/AcceptHeader.php b/src/Symfony/Component/HttpFoundation/AcceptHeader.php
index c702371f81..3f5fbb8f3b 100644
--- a/src/Symfony/Component/HttpFoundation/AcceptHeader.php
+++ b/src/Symfony/Component/HttpFoundation/AcceptHeader.php
@@ -24,7 +24,7 @@ class AcceptHeader
     /**
      * @var AcceptHeaderItem[]
      */
-    private $items = array();
+    private $items = [];
 
     /**
      * @var bool
diff --git a/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php b/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
index 2aaf59579f..954aac6014 100644
--- a/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
+++ b/src/Symfony/Component/HttpFoundation/AcceptHeaderItem.php
@@ -21,9 +21,9 @@ class AcceptHeaderItem
     private $value;
     private $quality = 1.0;
     private $index = 0;
-    private $attributes = array();
+    private $attributes = [];
 
-    public function __construct(string $value, array $attributes = array())
+    public function __construct(string $value, array $attributes = [])
     {
         $this->value = $value;
         foreach ($attributes as $name => $value) {
diff --git a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
index 07ef800508..0f5c9bb670 100644
--- a/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
+++ b/src/Symfony/Component/HttpFoundation/BinaryFileResponse.php
@@ -44,7 +44,7 @@ class BinaryFileResponse extends Response
      * @param bool                $autoEtag           Whether the ETag header should be automatically set
      * @param bool                $autoLastModified   Whether the Last-Modified header should be automatically set
      */
-    public function __construct($file, int $status = 200, array $headers = array(), bool $public = true, string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true)
+    public function __construct($file, int $status = 200, array $headers = [], bool $public = true, string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true)
     {
         parent::__construct(null, $status, $headers);
 
@@ -66,7 +66,7 @@ class BinaryFileResponse extends Response
      *
      * @return static
      */
-    public static function create($file = null, $status = 200, $headers = array(), $public = true, $contentDisposition = null, $autoEtag = false, $autoLastModified = true)
+    public static function create($file = null, $status = 200, $headers = [], $public = true, $contentDisposition = null, $autoEtag = false, $autoLastModified = true)
     {
         return new static($file, $status, $headers, $public, $contentDisposition, $autoEtag, $autoLastModified);
     }
@@ -234,7 +234,7 @@ class BinaryFileResponse extends Response
             if (!$request->headers->has('If-Range') || $this->hasValidIfRangeHeader($request->headers->get('If-Range'))) {
                 $range = $request->headers->get('Range');
 
-                list($start, $end) = explode('-', substr($range, 6), 2) + array(0);
+                list($start, $end) = explode('-', substr($range, 6), 2) + [0];
 
                 $end = ('' === $end) ? $fileSize - 1 : (int) $end;
 
diff --git a/src/Symfony/Component/HttpFoundation/Cookie.php b/src/Symfony/Component/HttpFoundation/Cookie.php
index 7aab318ccd..0ba6037d7c 100644
--- a/src/Symfony/Component/HttpFoundation/Cookie.php
+++ b/src/Symfony/Component/HttpFoundation/Cookie.php
@@ -42,7 +42,7 @@ class Cookie
      */
     public static function fromString($cookie, $decode = false)
     {
-        $data = array(
+        $data = [
             'expires' => 0,
             'path' => '/',
             'domain' => null,
@@ -50,7 +50,7 @@ class Cookie
             'httponly' => false,
             'raw' => !$decode,
             'samesite' => null,
-        );
+        ];
 
         $parts = HeaderUtils::split($cookie, ';=');
         $part = array_shift($parts);
@@ -126,7 +126,7 @@ class Cookie
             $sameSite = strtolower($sameSite);
         }
 
-        if (!\in_array($sameSite, array(self::SAMESITE_LAX, self::SAMESITE_STRICT, null), true)) {
+        if (!\in_array($sameSite, [self::SAMESITE_LAX, self::SAMESITE_STRICT, null], true)) {
             throw new \InvalidArgumentException('The "sameSite" parameter value is not valid.');
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/ExpressionRequestMatcher.php b/src/Symfony/Component/HttpFoundation/ExpressionRequestMatcher.php
index e9c8441ce3..26bed7d371 100644
--- a/src/Symfony/Component/HttpFoundation/ExpressionRequestMatcher.php
+++ b/src/Symfony/Component/HttpFoundation/ExpressionRequestMatcher.php
@@ -35,13 +35,13 @@ class ExpressionRequestMatcher extends RequestMatcher
             throw new \LogicException('Unable to match the request as the expression language is not available.');
         }
 
-        return $this->language->evaluate($this->expression, array(
+        return $this->language->evaluate($this->expression, [
             'request' => $request,
             'method' => $request->getMethod(),
             'path' => rawurldecode($request->getPathInfo()),
             'host' => $request->getHost(),
             'ip' => $request->getClientIp(),
             'attributes' => $request->attributes->all(),
-        )) && parent::matches($request);
+        ]) && parent::matches($request);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesser.php b/src/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesser.php
index 263fb321c5..80f4d47f76 100644
--- a/src/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesser.php
+++ b/src/Symfony/Component/HttpFoundation/File/MimeType/ExtensionGuesser.php
@@ -37,7 +37,7 @@ class ExtensionGuesser implements ExtensionGuesserInterface
      *
      * @var array
      */
-    protected $guessers = array();
+    protected $guessers = [];
 
     /**
      * Returns the singleton instance.
diff --git a/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php b/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php
index dae47a7c02..95d1ee2676 100644
--- a/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php
+++ b/src/Symfony/Component/HttpFoundation/File/MimeType/MimeTypeGuesser.php
@@ -51,7 +51,7 @@ class MimeTypeGuesser implements MimeTypeGuesserInterface
      *
      * @var array
      */
-    protected $guessers = array();
+    protected $guessers = [];
 
     /**
      * Returns the singleton instance.
diff --git a/src/Symfony/Component/HttpFoundation/File/UploadedFile.php b/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
index 63fa6c7302..efe00d64cc 100644
--- a/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
+++ b/src/Symfony/Component/HttpFoundation/File/UploadedFile.php
@@ -281,7 +281,7 @@ class UploadedFile extends File
      */
     public function getErrorMessage()
     {
-        static $errors = array(
+        static $errors = [
             UPLOAD_ERR_INI_SIZE => 'The file "%s" exceeds your upload_max_filesize ini directive (limit is %d KiB).',
             UPLOAD_ERR_FORM_SIZE => 'The file "%s" exceeds the upload limit defined in your form.',
             UPLOAD_ERR_PARTIAL => 'The file "%s" was only partially uploaded.',
@@ -289,7 +289,7 @@ class UploadedFile extends File
             UPLOAD_ERR_CANT_WRITE => 'The file "%s" could not be written on disk.',
             UPLOAD_ERR_NO_TMP_DIR => 'File could not be uploaded: missing temporary directory.',
             UPLOAD_ERR_EXTENSION => 'File upload was stopped by a PHP extension.',
-        );
+        ];
 
         $errorCode = $this->error;
         $maxFilesize = UPLOAD_ERR_INI_SIZE === $errorCode ? self::getMaxFilesize() / 1024 : 0;
diff --git a/src/Symfony/Component/HttpFoundation/FileBag.php b/src/Symfony/Component/HttpFoundation/FileBag.php
index f37e10f204..14fbc7aa9d 100644
--- a/src/Symfony/Component/HttpFoundation/FileBag.php
+++ b/src/Symfony/Component/HttpFoundation/FileBag.php
@@ -21,12 +21,12 @@ use Symfony\Component\HttpFoundation\File\UploadedFile;
  */
 class FileBag extends ParameterBag
 {
-    private static $fileKeys = array('error', 'name', 'size', 'tmp_name', 'type');
+    private static $fileKeys = ['error', 'name', 'size', 'tmp_name', 'type'];
 
     /**
      * @param array $parameters An array of HTTP files
      */
-    public function __construct(array $parameters = array())
+    public function __construct(array $parameters = [])
     {
         $this->replace($parameters);
     }
@@ -34,9 +34,9 @@ class FileBag extends ParameterBag
     /**
      * {@inheritdoc}
      */
-    public function replace(array $files = array())
+    public function replace(array $files = [])
     {
-        $this->parameters = array();
+        $this->parameters = [];
         $this->add($files);
     }
 
@@ -55,7 +55,7 @@ class FileBag extends ParameterBag
     /**
      * {@inheritdoc}
      */
-    public function add(array $files = array())
+    public function add(array $files = [])
     {
         foreach ($files as $key => $file) {
             $this->set($key, $file);
@@ -87,7 +87,7 @@ class FileBag extends ParameterBag
                     $file = new UploadedFile($file['tmp_name'], $file['name'], $file['type'], $file['error']);
                 }
             } else {
-                $file = array_map(array($this, 'convertFileInformation'), $file);
+                $file = array_map([$this, 'convertFileInformation'], $file);
                 if (array_keys($keys) === $keys) {
                     $file = array_filter($file);
                 }
@@ -130,13 +130,13 @@ class FileBag extends ParameterBag
         }
 
         foreach ($data['name'] as $key => $name) {
-            $files[$key] = $this->fixPhpFilesArray(array(
+            $files[$key] = $this->fixPhpFilesArray([
                 'error' => $data['error'][$key],
                 'name' => $name,
                 'type' => $data['type'][$key],
                 'tmp_name' => $data['tmp_name'][$key],
                 'size' => $data['size'][$key],
-            ));
+            ]);
         }
 
         return $files;
diff --git a/src/Symfony/Component/HttpFoundation/HeaderBag.php b/src/Symfony/Component/HttpFoundation/HeaderBag.php
index 8f51ef9dba..b37a72e47e 100644
--- a/src/Symfony/Component/HttpFoundation/HeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/HeaderBag.php
@@ -18,13 +18,13 @@ namespace Symfony\Component\HttpFoundation;
  */
 class HeaderBag implements \IteratorAggregate, \Countable
 {
-    protected $headers = array();
-    protected $cacheControl = array();
+    protected $headers = [];
+    protected $cacheControl = [];
 
     /**
      * @param array $headers An array of HTTP headers
      */
-    public function __construct(array $headers = array())
+    public function __construct(array $headers = [])
     {
         foreach ($headers as $key => $values) {
             $this->set($key, $values);
@@ -80,9 +80,9 @@ class HeaderBag implements \IteratorAggregate, \Countable
      *
      * @param array $headers An array of HTTP headers
      */
-    public function replace(array $headers = array())
+    public function replace(array $headers = [])
     {
-        $this->headers = array();
+        $this->headers = [];
         $this->add($headers);
     }
 
@@ -114,10 +114,10 @@ class HeaderBag implements \IteratorAggregate, \Countable
 
         if (!array_key_exists($key, $headers)) {
             if (null === $default) {
-                return $first ? null : array();
+                return $first ? null : [];
             }
 
-            return $first ? $default : array($default);
+            return $first ? $default : [$default];
         }
 
         if ($first) {
@@ -148,7 +148,7 @@ class HeaderBag implements \IteratorAggregate, \Countable
             }
         } else {
             if (true === $replace || !isset($this->headers[$key])) {
-                $this->headers[$key] = array($values);
+                $this->headers[$key] = [$values];
             } else {
                 $this->headers[$key][] = $values;
             }
@@ -196,7 +196,7 @@ class HeaderBag implements \IteratorAggregate, \Countable
         unset($this->headers[$key]);
 
         if ('cache-control' === $key) {
-            $this->cacheControl = array();
+            $this->cacheControl = [];
         }
     }
 
diff --git a/src/Symfony/Component/HttpFoundation/HeaderUtils.php b/src/Symfony/Component/HttpFoundation/HeaderUtils.php
index 637bc5be47..31db1bd0de 100644
--- a/src/Symfony/Component/HttpFoundation/HeaderUtils.php
+++ b/src/Symfony/Component/HttpFoundation/HeaderUtils.php
@@ -34,7 +34,7 @@ class HeaderUtils
      * Example:
      *
      *     HeaderUtils::split("da, en-gb;q=0.8", ",;")
-     *     // => array(array('da'), array('en-gb', 'q=0.8'))
+     *     // => ['da'], ['en-gb', 'q=0.8']]
      *
      * @param string $header     HTTP header value
      * @param string $separators List of characters to split on, ordered by
@@ -78,12 +78,12 @@ class HeaderUtils
      *
      * Example:
      *
-     *     HeaderUtils::combine(array(array("foo", "abc"), array("bar")))
-     *     // => array("foo" => "abc", "bar" => true)
+     *     HeaderUtils::combine([["foo", "abc"], ["bar"]])
+     *     // => ["foo" => "abc", "bar" => true]
      */
     public static function combine(array $parts): array
     {
-        $assoc = array();
+        $assoc = [];
         foreach ($parts as $part) {
             $name = strtolower($part[0]);
             $value = $part[1] ?? true;
@@ -102,12 +102,12 @@ class HeaderUtils
      *
      * Example:
      *
-     *     HeaderUtils::toString(array("foo" => "abc", "bar" => true, "baz" => "a b c"), ",")
+     *     HeaderUtils::toString(["foo" => "abc", "bar" => true, "baz" => "a b c"], ",")
      *     // => 'foo=abc, bar, baz="a b c"'
      */
     public static function toString(array $assoc, string $separator): string
     {
-        $parts = array();
+        $parts = [];
         foreach ($assoc as $name => $value) {
             if (true === $value) {
                 $parts[] = $name;
@@ -163,7 +163,7 @@ class HeaderUtils
      */
     public static function makeDisposition(string $disposition, string $filename, string $filenameFallback = ''): string
     {
-        if (!\in_array($disposition, array(self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE))) {
+        if (!\in_array($disposition, [self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE])) {
             throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
         }
 
@@ -186,7 +186,7 @@ class HeaderUtils
             throw new \InvalidArgumentException('The filename and the fallback cannot contain the "/" and "\\" characters.');
         }
 
-        $params = array('filename' => $filenameFallback);
+        $params = ['filename' => $filenameFallback];
         if ($filename !== $filenameFallback) {
             $params['filename*'] = "utf-8''".rawurlencode($filename);
         }
@@ -200,7 +200,7 @@ class HeaderUtils
         $partSeparators = substr($separators, 1);
 
         $i = 0;
-        $partMatches = array();
+        $partMatches = [];
         foreach ($matches as $match) {
             if (isset($match['separator']) && $match['separator'] === $separator) {
                 ++$i;
@@ -209,7 +209,7 @@ class HeaderUtils
             }
         }
 
-        $parts = array();
+        $parts = [];
         if ($partSeparators) {
             foreach ($partMatches as $matches) {
                 $parts[] = self::groupParts($matches, $partSeparators);
diff --git a/src/Symfony/Component/HttpFoundation/IpUtils.php b/src/Symfony/Component/HttpFoundation/IpUtils.php
index a1bfa90885..67d13e57aa 100644
--- a/src/Symfony/Component/HttpFoundation/IpUtils.php
+++ b/src/Symfony/Component/HttpFoundation/IpUtils.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\HttpFoundation;
  */
 class IpUtils
 {
-    private static $checkedIps = array();
+    private static $checkedIps = [];
 
     /**
      * This class should not be instantiated.
@@ -38,7 +38,7 @@ class IpUtils
     public static function checkIp($requestIp, $ips)
     {
         if (!\is_array($ips)) {
-            $ips = array($ips);
+            $ips = [$ips];
         }
 
         $method = substr_count($requestIp, ':') > 1 ? 'checkIp6' : 'checkIp4';
diff --git a/src/Symfony/Component/HttpFoundation/JsonResponse.php b/src/Symfony/Component/HttpFoundation/JsonResponse.php
index f10262e88e..817cbb9afc 100644
--- a/src/Symfony/Component/HttpFoundation/JsonResponse.php
+++ b/src/Symfony/Component/HttpFoundation/JsonResponse.php
@@ -39,7 +39,7 @@ class JsonResponse extends Response
      * @param array $headers An array of response headers
      * @param bool  $json    If the data is already a JSON string
      */
-    public function __construct($data = null, int $status = 200, array $headers = array(), bool $json = false)
+    public function __construct($data = null, int $status = 200, array $headers = [], bool $json = false)
     {
         parent::__construct('', $status, $headers);
 
@@ -64,7 +64,7 @@ class JsonResponse extends Response
      *
      * @return static
      */
-    public static function create($data = null, $status = 200, $headers = array())
+    public static function create($data = null, $status = 200, $headers = [])
     {
         return new static($data, $status, $headers);
     }
@@ -72,7 +72,7 @@ class JsonResponse extends Response
     /**
      * Make easier the creation of JsonResponse from raw json.
      */
-    public static function fromJsonString($data = null, $status = 200, $headers = array())
+    public static function fromJsonString($data = null, $status = 200, $headers = [])
     {
         return new static($data, $status, $headers, true);
     }
@@ -94,11 +94,11 @@ class JsonResponse extends Response
             //      JsonpCallbackValidator is released under the MIT License. See https://github.com/willdurand/JsonpCallbackValidator/blob/v1.1.0/LICENSE for details.
             //      (c) William Durand <william.durand1@gmail.com>
             $pattern = '/^[$_\p{L}][$_\p{L}\p{Mn}\p{Mc}\p{Nd}\p{Pc}\x{200C}\x{200D}]*(?:\[(?:"(?:\\\.|[^"\\\])*"|\'(?:\\\.|[^\'\\\])*\'|\d+)\])*?$/u';
-            $reserved = array(
+            $reserved = [
                 'break', 'do', 'instanceof', 'typeof', 'case', 'else', 'new', 'var', 'catch', 'finally', 'return', 'void', 'continue', 'for', 'switch', 'while',
                 'debugger', 'function', 'this', 'with', 'default', 'if', 'throw', 'delete', 'in', 'try', 'class', 'enum', 'extends', 'super',  'const', 'export',
                 'import', 'implements', 'let', 'private', 'public', 'yield', 'interface', 'package', 'protected', 'static', 'null', 'true', 'false',
-            );
+            ];
             $parts = explode('.', $callback);
             foreach ($parts as $part) {
                 if (!preg_match($pattern, $part) || \in_array($part, $reserved, true)) {
@@ -137,7 +137,7 @@ class JsonResponse extends Response
      *
      * @throws \InvalidArgumentException
      */
-    public function setData($data = array())
+    public function setData($data = [])
     {
         try {
             $data = json_encode($data, $this->encodingOptions);
diff --git a/src/Symfony/Component/HttpFoundation/ParameterBag.php b/src/Symfony/Component/HttpFoundation/ParameterBag.php
index 19d7ee913a..3c6ba46a6a 100644
--- a/src/Symfony/Component/HttpFoundation/ParameterBag.php
+++ b/src/Symfony/Component/HttpFoundation/ParameterBag.php
@@ -26,7 +26,7 @@ class ParameterBag implements \IteratorAggregate, \Countable
     /**
      * @param array $parameters An array of parameters
      */
-    public function __construct(array $parameters = array())
+    public function __construct(array $parameters = [])
     {
         $this->parameters = $parameters;
     }
@@ -56,7 +56,7 @@ class ParameterBag implements \IteratorAggregate, \Countable
      *
      * @param array $parameters An array of parameters
      */
-    public function replace(array $parameters = array())
+    public function replace(array $parameters = [])
     {
         $this->parameters = $parameters;
     }
@@ -66,7 +66,7 @@ class ParameterBag implements \IteratorAggregate, \Countable
      *
      * @param array $parameters An array of parameters
      */
-    public function add(array $parameters = array())
+    public function add(array $parameters = [])
     {
         $this->parameters = array_replace($this->parameters, $parameters);
     }
@@ -154,7 +154,7 @@ class ParameterBag implements \IteratorAggregate, \Countable
     public function getDigits($key, $default = '')
     {
         // we need to remove - and + because they're allowed in the filter
-        return str_replace(array('-', '+'), '', $this->filter($key, $default, FILTER_SANITIZE_NUMBER_INT));
+        return str_replace(['-', '+'], '', $this->filter($key, $default, FILTER_SANITIZE_NUMBER_INT));
     }
 
     /**
@@ -195,13 +195,13 @@ class ParameterBag implements \IteratorAggregate, \Countable
      *
      * @return mixed
      */
-    public function filter($key, $default = null, $filter = FILTER_DEFAULT, $options = array())
+    public function filter($key, $default = null, $filter = FILTER_DEFAULT, $options = [])
     {
         $value = $this->get($key, $default);
 
         // Always turn $options into an array - this allows filter_var option shortcuts.
         if (!\is_array($options) && $options) {
-            $options = array('flags' => $options);
+            $options = ['flags' => $options];
         }
 
         // Add a convenience check for arrays.
diff --git a/src/Symfony/Component/HttpFoundation/RedirectResponse.php b/src/Symfony/Component/HttpFoundation/RedirectResponse.php
index 11f71a0342..22e5fbb2d0 100644
--- a/src/Symfony/Component/HttpFoundation/RedirectResponse.php
+++ b/src/Symfony/Component/HttpFoundation/RedirectResponse.php
@@ -32,7 +32,7 @@ class RedirectResponse extends Response
      *
      * @see http://tools.ietf.org/html/rfc2616#section-10.3
      */
-    public function __construct(?string $url, int $status = 302, array $headers = array())
+    public function __construct(?string $url, int $status = 302, array $headers = [])
     {
         parent::__construct('', $status, $headers);
 
@@ -56,7 +56,7 @@ class RedirectResponse extends Response
      *
      * @return static
      */
-    public static function create($url = '', $status = 302, $headers = array())
+    public static function create($url = '', $status = 302, $headers = [])
     {
         return new static($url, $status, $headers);
     }
diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index c13016e522..7f44aab1d5 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -52,17 +52,17 @@ class Request
     /**
      * @var string[]
      */
-    protected static $trustedProxies = array();
+    protected static $trustedProxies = [];
 
     /**
      * @var string[]
      */
-    protected static $trustedHostPatterns = array();
+    protected static $trustedHostPatterns = [];
 
     /**
      * @var string[]
      */
-    protected static $trustedHosts = array();
+    protected static $trustedHosts = [];
 
     protected static $httpMethodParameterOverride = false;
 
@@ -197,12 +197,12 @@ class Request
 
     private static $trustedHeaderSet = -1;
 
-    private static $forwardedParams = array(
+    private static $forwardedParams = [
         self::HEADER_X_FORWARDED_FOR => 'for',
         self::HEADER_X_FORWARDED_HOST => 'host',
         self::HEADER_X_FORWARDED_PROTO => 'proto',
         self::HEADER_X_FORWARDED_PORT => 'host',
-    );
+    ];
 
     /**
      * Names for headers that can be trusted when
@@ -213,13 +213,13 @@ class Request
      * The other headers are non-standard, but widely used
      * by popular reverse proxies (like Apache mod_proxy or Amazon EC2).
      */
-    private static $trustedHeaders = array(
+    private static $trustedHeaders = [
         self::HEADER_FORWARDED => 'FORWARDED',
         self::HEADER_X_FORWARDED_FOR => 'X_FORWARDED_FOR',
         self::HEADER_X_FORWARDED_HOST => 'X_FORWARDED_HOST',
         self::HEADER_X_FORWARDED_PROTO => 'X_FORWARDED_PROTO',
         self::HEADER_X_FORWARDED_PORT => 'X_FORWARDED_PORT',
-    );
+    ];
 
     /**
      * @param array                $query      The GET parameters
@@ -230,7 +230,7 @@ class Request
      * @param array                $server     The SERVER parameters
      * @param string|resource|null $content    The raw body data
      */
-    public function __construct(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
+    public function __construct(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null)
     {
         $this->initialize($query, $request, $attributes, $cookies, $files, $server, $content);
     }
@@ -248,7 +248,7 @@ class Request
      * @param array                $server     The SERVER parameters
      * @param string|resource|null $content    The raw body data
      */
-    public function initialize(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
+    public function initialize(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null)
     {
         $this->request = new ParameterBag($request);
         $this->query = new ParameterBag($query);
@@ -278,10 +278,10 @@ class Request
      */
     public static function createFromGlobals()
     {
-        $request = self::createRequestFromFactory($_GET, $_POST, array(), $_COOKIE, $_FILES, $_SERVER);
+        $request = self::createRequestFromFactory($_GET, $_POST, [], $_COOKIE, $_FILES, $_SERVER);
 
         if (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded')
-            && \in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), array('PUT', 'DELETE', 'PATCH'))
+            && \in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), ['PUT', 'DELETE', 'PATCH'])
         ) {
             parse_str($request->getContent(), $data);
             $request->request = new ParameterBag($data);
@@ -306,9 +306,9 @@ class Request
      *
      * @return static
      */
-    public static function create($uri, $method = 'GET', $parameters = array(), $cookies = array(), $files = array(), $server = array(), $content = null)
+    public static function create($uri, $method = 'GET', $parameters = [], $cookies = [], $files = [], $server = [], $content = null)
     {
-        $server = array_replace(array(
+        $server = array_replace([
             'SERVER_NAME' => 'localhost',
             'SERVER_PORT' => 80,
             'HTTP_HOST' => 'localhost',
@@ -321,7 +321,7 @@ class Request
             'SCRIPT_FILENAME' => '',
             'SERVER_PROTOCOL' => 'HTTP/1.1',
             'REQUEST_TIME' => time(),
-        ), $server);
+        ], $server);
 
         $server['PATH_INFO'] = '';
         $server['REQUEST_METHOD'] = strtoupper($method);
@@ -369,10 +369,10 @@ class Request
                 // no break
             case 'PATCH':
                 $request = $parameters;
-                $query = array();
+                $query = [];
                 break;
             default:
-                $request = array();
+                $request = [];
                 $query = $parameters;
                 break;
         }
@@ -395,7 +395,7 @@ class Request
         $server['REQUEST_URI'] = $components['path'].('' !== $queryString ? '?'.$queryString : '');
         $server['QUERY_STRING'] = $queryString;
 
-        return self::createRequestFromFactory($query, $request, array(), $cookies, $files, $server, $content);
+        return self::createRequestFromFactory($query, $request, [], $cookies, $files, $server, $content);
     }
 
     /**
@@ -499,7 +499,7 @@ class Request
         }
 
         $cookieHeader = '';
-        $cookies = array();
+        $cookies = [];
 
         foreach ($this->cookies as $k => $v) {
             $cookies[] = $k.'='.$v;
@@ -533,19 +533,19 @@ class Request
 
         foreach ($this->headers->all() as $key => $value) {
             $key = strtoupper(str_replace('-', '_', $key));
-            if (\in_array($key, array('CONTENT_TYPE', 'CONTENT_LENGTH'))) {
+            if (\in_array($key, ['CONTENT_TYPE', 'CONTENT_LENGTH'])) {
                 $_SERVER[$key] = implode(', ', $value);
             } else {
                 $_SERVER['HTTP_'.$key] = implode(', ', $value);
             }
         }
 
-        $request = array('g' => $_GET, 'p' => $_POST, 'c' => $_COOKIE);
+        $request = ['g' => $_GET, 'p' => $_POST, 'c' => $_COOKIE];
 
         $requestOrder = ini_get('request_order') ?: ini_get('variables_order');
         $requestOrder = preg_replace('#[^cgp]#', '', strtolower($requestOrder)) ?: 'gp';
 
-        $_REQUEST = array(array());
+        $_REQUEST = [[]];
 
         foreach (str_split($requestOrder) as $order) {
             $_REQUEST[] = $request[$order];
@@ -603,7 +603,7 @@ class Request
             return sprintf('{%s}i', $hostPattern);
         }, $hostPatterns);
         // we need to reset trusted hosts on trusted host patterns change
-        self::$trustedHosts = array();
+        self::$trustedHosts = [];
     }
 
     /**
@@ -777,10 +777,10 @@ class Request
         $ip = $this->server->get('REMOTE_ADDR');
 
         if (!$this->isFromTrustedProxy()) {
-            return array($ip);
+            return [$ip];
         }
 
-        return $this->getTrustedValues(self::HEADER_X_FORWARDED_FOR, $ip) ?: array($ip);
+        return $this->getTrustedValues(self::HEADER_X_FORWARDED_FOR, $ip) ?: [$ip];
     }
 
     /**
@@ -1114,7 +1114,7 @@ class Request
     public function isSecure()
     {
         if ($this->isFromTrustedProxy() && $proto = $this->getTrustedValues(self::HEADER_X_FORWARDED_PROTO)) {
-            return \in_array(strtolower($proto[0]), array('https', 'on', 'ssl', '1'), true);
+            return \in_array(strtolower($proto[0]), ['https', 'on', 'ssl', '1'], true);
         }
 
         $https = $this->server->get('HTTPS');
@@ -1273,7 +1273,7 @@ class Request
             static::initializeFormats();
         }
 
-        return isset(static::$formats[$format]) ? static::$formats[$format] : array();
+        return isset(static::$formats[$format]) ? static::$formats[$format] : [];
     }
 
     /**
@@ -1316,7 +1316,7 @@ class Request
             static::initializeFormats();
         }
 
-        static::$formats[$format] = \is_array($mimeTypes) ? $mimeTypes : array($mimeTypes);
+        static::$formats[$format] = \is_array($mimeTypes) ? $mimeTypes : [$mimeTypes];
     }
 
     /**
@@ -1433,7 +1433,7 @@ class Request
             throw new \BadMethodCallException('Checking only for cacheable HTTP methods with Symfony\Component\HttpFoundation\Request::isMethodSafe() is not supported.');
         }
 
-        return \in_array($this->getMethod(), array('GET', 'HEAD', 'OPTIONS', 'TRACE'));
+        return \in_array($this->getMethod(), ['GET', 'HEAD', 'OPTIONS', 'TRACE']);
     }
 
     /**
@@ -1443,7 +1443,7 @@ class Request
      */
     public function isMethodIdempotent()
     {
-        return \in_array($this->getMethod(), array('HEAD', 'GET', 'PUT', 'DELETE', 'TRACE', 'OPTIONS', 'PURGE'));
+        return \in_array($this->getMethod(), ['HEAD', 'GET', 'PUT', 'DELETE', 'TRACE', 'OPTIONS', 'PURGE']);
     }
 
     /**
@@ -1455,7 +1455,7 @@ class Request
      */
     public function isMethodCacheable()
     {
-        return \in_array($this->getMethod(), array('GET', 'HEAD'));
+        return \in_array($this->getMethod(), ['GET', 'HEAD']);
     }
 
     /**
@@ -1566,7 +1566,7 @@ class Request
             return $locales[0];
         }
 
-        $extendedPreferredLanguages = array();
+        $extendedPreferredLanguages = [];
         foreach ($preferredLanguages as $language) {
             $extendedPreferredLanguages[] = $language;
             if (false !== $position = strpos($language, '_')) {
@@ -1594,7 +1594,7 @@ class Request
         }
 
         $languages = AcceptHeader::fromString($this->headers->get('Accept-Language'))->all();
-        $this->languages = array();
+        $this->languages = [];
         foreach ($languages as $lang => $acceptHeaderItem) {
             if (false !== strpos($lang, '-')) {
                 $codes = explode('-', $lang);
@@ -1864,19 +1864,19 @@ class Request
      */
     protected static function initializeFormats()
     {
-        static::$formats = array(
-            'html' => array('text/html', 'application/xhtml+xml'),
-            'txt' => array('text/plain'),
-            'js' => array('application/javascript', 'application/x-javascript', 'text/javascript'),
-            'css' => array('text/css'),
-            'json' => array('application/json', 'application/x-json'),
-            'jsonld' => array('application/ld+json'),
-            'xml' => array('text/xml', 'application/xml', 'application/x-xml'),
-            'rdf' => array('application/rdf+xml'),
-            'atom' => array('application/atom+xml'),
-            'rss' => array('application/rss+xml'),
-            'form' => array('application/x-www-form-urlencoded'),
-        );
+        static::$formats = [
+            'html' => ['text/html', 'application/xhtml+xml'],
+            'txt' => ['text/plain'],
+            'js' => ['application/javascript', 'application/x-javascript', 'text/javascript'],
+            'css' => ['text/css'],
+            'json' => ['application/json', 'application/x-json'],
+            'jsonld' => ['application/ld+json'],
+            'xml' => ['text/xml', 'application/xml', 'application/x-xml'],
+            'rdf' => ['application/rdf+xml'],
+            'atom' => ['application/atom+xml'],
+            'rss' => ['application/rss+xml'],
+            'form' => ['application/x-www-form-urlencoded'],
+        ];
     }
 
     private function setPhpDefaultLocale(string $locale)
@@ -1913,7 +1913,7 @@ class Request
         return false;
     }
 
-    private static function createRequestFromFactory(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
+    private static function createRequestFromFactory(array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null)
     {
         if (self::$requestFactory) {
             $request = (self::$requestFactory)($query, $request, $attributes, $cookies, $files, $server, $content);
@@ -1943,8 +1943,8 @@ class Request
 
     private function getTrustedValues($type, $ip = null)
     {
-        $clientValues = array();
-        $forwardedValues = array();
+        $clientValues = [];
+        $forwardedValues = [];
 
         if ((self::$trustedHeaderSet & $type) && $this->headers->has(self::$trustedHeaders[$type])) {
             foreach (explode(',', $this->headers->get(self::$trustedHeaders[$type])) as $v) {
@@ -1955,7 +1955,7 @@ class Request
         if ((self::$trustedHeaderSet & self::HEADER_FORWARDED) && $this->headers->has(self::$trustedHeaders[self::HEADER_FORWARDED])) {
             $forwarded = $this->headers->get(self::$trustedHeaders[self::HEADER_FORWARDED]);
             $parts = HeaderUtils::split($forwarded, ',;=');
-            $forwardedValues = array();
+            $forwardedValues = [];
             $param = self::$forwardedParams[$type];
             foreach ($parts as $subParts) {
                 if (null === $v = HeaderUtils::combine($subParts)[$param] ?? null) {
@@ -1985,7 +1985,7 @@ class Request
         }
 
         if (!$this->isForwardedValid) {
-            return null !== $ip ? array('0.0.0.0', $ip) : array();
+            return null !== $ip ? ['0.0.0.0', $ip] : [];
         }
         $this->isForwardedValid = false;
 
@@ -1995,7 +1995,7 @@ class Request
     private function normalizeAndFilterClientIps(array $clientIps, $ip)
     {
         if (!$clientIps) {
-            return array();
+            return [];
         }
         $clientIps[] = $ip; // Complete the IP chain with the IP the request actually came from
         $firstTrustedIp = null;
@@ -2031,6 +2031,6 @@ class Request
         }
 
         // Now the IP chain contains only untrusted proxies and the client IP
-        return $clientIps ? array_reverse($clientIps) : array($firstTrustedIp);
+        return $clientIps ? array_reverse($clientIps) : [$firstTrustedIp];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/RequestMatcher.php b/src/Symfony/Component/HttpFoundation/RequestMatcher.php
index ab9434f43f..d79c7f2ea2 100644
--- a/src/Symfony/Component/HttpFoundation/RequestMatcher.php
+++ b/src/Symfony/Component/HttpFoundation/RequestMatcher.php
@@ -36,22 +36,22 @@ class RequestMatcher implements RequestMatcherInterface
     /**
      * @var string[]
      */
-    private $methods = array();
+    private $methods = [];
 
     /**
      * @var string[]
      */
-    private $ips = array();
+    private $ips = [];
 
     /**
      * @var array
      */
-    private $attributes = array();
+    private $attributes = [];
 
     /**
      * @var string[]
      */
-    private $schemes = array();
+    private $schemes = [];
 
     /**
      * @param string|null          $path
@@ -61,7 +61,7 @@ class RequestMatcher implements RequestMatcherInterface
      * @param array                $attributes
      * @param string|string[]|null $schemes
      */
-    public function __construct(string $path = null, string $host = null, $methods = null, $ips = null, array $attributes = array(), $schemes = null, int $port = null)
+    public function __construct(string $path = null, string $host = null, $methods = null, $ips = null, array $attributes = [], $schemes = null, int $port = null)
     {
         $this->matchPath($path);
         $this->matchHost($host);
@@ -82,7 +82,7 @@ class RequestMatcher implements RequestMatcherInterface
      */
     public function matchScheme($scheme)
     {
-        $this->schemes = null !== $scheme ? array_map('strtolower', (array) $scheme) : array();
+        $this->schemes = null !== $scheme ? array_map('strtolower', (array) $scheme) : [];
     }
 
     /**
@@ -132,7 +132,7 @@ class RequestMatcher implements RequestMatcherInterface
      */
     public function matchIps($ips)
     {
-        $this->ips = null !== $ips ? (array) $ips : array();
+        $this->ips = null !== $ips ? (array) $ips : [];
     }
 
     /**
@@ -142,7 +142,7 @@ class RequestMatcher implements RequestMatcherInterface
      */
     public function matchMethod($method)
     {
-        $this->methods = null !== $method ? array_map('strtoupper', (array) $method) : array();
+        $this->methods = null !== $method ? array_map('strtoupper', (array) $method) : [];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/RequestStack.php b/src/Symfony/Component/HttpFoundation/RequestStack.php
index 40123f66f9..885d78a50e 100644
--- a/src/Symfony/Component/HttpFoundation/RequestStack.php
+++ b/src/Symfony/Component/HttpFoundation/RequestStack.php
@@ -21,7 +21,7 @@ class RequestStack
     /**
      * @var Request[]
      */
-    private $requests = array();
+    private $requests = [];
 
     /**
      * Pushes a Request on the stack.
diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 7c96212603..26b3f209d5 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -128,7 +128,7 @@ class Response
      *
      * @var array
      */
-    public static $statusTexts = array(
+    public static $statusTexts = [
         100 => 'Continue',
         101 => 'Switching Protocols',
         102 => 'Processing',            // RFC2518
@@ -191,12 +191,12 @@ class Response
         508 => 'Loop Detected',                                               // RFC5842
         510 => 'Not Extended',                                                // RFC2774
         511 => 'Network Authentication Required',                             // RFC6585
-    );
+    ];
 
     /**
      * @throws \InvalidArgumentException When the HTTP status code is not valid
      */
-    public function __construct($content = '', int $status = 200, array $headers = array())
+    public function __construct($content = '', int $status = 200, array $headers = [])
     {
         $this->headers = new ResponseHeaderBag($headers);
         $this->setContent($content);
@@ -218,7 +218,7 @@ class Response
      *
      * @return static
      */
-    public static function create($content = '', $status = 200, $headers = array())
+    public static function create($content = '', $status = 200, $headers = [])
     {
         return new static($content, $status, $headers);
     }
@@ -377,7 +377,7 @@ class Response
 
         if (\function_exists('fastcgi_finish_request')) {
             fastcgi_finish_request();
-        } elseif (!\in_array(\PHP_SAPI, array('cli', 'phpdbg'), true)) {
+        } elseif (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
             static::closeOutputBuffers(0, true);
         }
 
@@ -397,7 +397,7 @@ class Response
      */
     public function setContent($content)
     {
-        if (null !== $content && !\is_string($content) && !is_numeric($content) && !\is_callable(array($content, '__toString'))) {
+        if (null !== $content && !\is_string($content) && !is_numeric($content) && !\is_callable([$content, '__toString'])) {
             throw new \UnexpectedValueException(sprintf('The Response content must be a string or object implementing __toString(), "%s" given.', \gettype($content)));
         }
 
@@ -529,7 +529,7 @@ class Response
      */
     public function isCacheable(): bool
     {
-        if (!\in_array($this->statusCode, array(200, 203, 300, 301, 302, 404, 410))) {
+        if (!\in_array($this->statusCode, [200, 203, 300, 301, 302, 404, 410])) {
             return false;
         }
 
@@ -939,7 +939,7 @@ class Response
      */
     public function setCache(array $options)
     {
-        if ($diff = array_diff(array_keys($options), array('etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public', 'immutable'))) {
+        if ($diff = array_diff(array_keys($options), ['etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public', 'immutable'])) {
             throw new \InvalidArgumentException(sprintf('Response does not support the following options: "%s".', implode('", "', $diff)));
         }
 
@@ -1000,7 +1000,7 @@ class Response
         $this->setContent(null);
 
         // remove headers that MUST NOT be included with 304 Not Modified responses
-        foreach (array('Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified') as $header) {
+        foreach (['Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified'] as $header) {
             $this->headers->remove($header);
         }
 
@@ -1025,10 +1025,10 @@ class Response
     public function getVary(): array
     {
         if (!$vary = $this->headers->get('Vary', null, false)) {
-            return array();
+            return [];
         }
 
-        $ret = array();
+        $ret = [];
         foreach ($vary as $item) {
             $ret = array_merge($ret, preg_split('/[\s,]+/', $item));
         }
@@ -1188,7 +1188,7 @@ class Response
      */
     public function isRedirect(string $location = null): bool
     {
-        return \in_array($this->statusCode, array(201, 301, 302, 303, 307, 308)) && (null === $location ?: $location == $this->headers->get('Location'));
+        return \in_array($this->statusCode, [201, 301, 302, 303, 307, 308]) && (null === $location ?: $location == $this->headers->get('Location'));
     }
 
     /**
@@ -1198,7 +1198,7 @@ class Response
      */
     public function isEmpty(): bool
     {
-        return \in_array($this->statusCode, array(204, 304));
+        return \in_array($this->statusCode, [204, 304]);
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
index 1141e8d987..9dd8908b27 100644
--- a/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
+++ b/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
@@ -24,11 +24,11 @@ class ResponseHeaderBag extends HeaderBag
     const DISPOSITION_ATTACHMENT = 'attachment';
     const DISPOSITION_INLINE = 'inline';
 
-    protected $computedCacheControl = array();
-    protected $cookies = array();
-    protected $headerNames = array();
+    protected $computedCacheControl = [];
+    protected $cookies = [];
+    protected $headerNames = [];
 
-    public function __construct(array $headers = array())
+    public function __construct(array $headers = [])
     {
         parent::__construct($headers);
 
@@ -49,7 +49,7 @@ class ResponseHeaderBag extends HeaderBag
      */
     public function allPreserveCase()
     {
-        $headers = array();
+        $headers = [];
         foreach ($this->all() as $name => $value) {
             $headers[isset($this->headerNames[$name]) ? $this->headerNames[$name] : $name] = $value;
         }
@@ -70,9 +70,9 @@ class ResponseHeaderBag extends HeaderBag
     /**
      * {@inheritdoc}
      */
-    public function replace(array $headers = array())
+    public function replace(array $headers = [])
     {
-        $this->headerNames = array();
+        $this->headerNames = [];
 
         parent::replace($headers);
 
@@ -107,7 +107,7 @@ class ResponseHeaderBag extends HeaderBag
 
         if ('set-cookie' === $uniqueKey) {
             if ($replace) {
-                $this->cookies = array();
+                $this->cookies = [];
             }
             foreach ((array) $values as $cookie) {
                 $this->setCookie(Cookie::fromString($cookie));
@@ -122,9 +122,9 @@ class ResponseHeaderBag extends HeaderBag
         parent::set($key, $values, $replace);
 
         // ensure the cache-control header has sensible defaults
-        if (\in_array($uniqueKey, array('cache-control', 'etag', 'last-modified', 'expires'), true)) {
+        if (\in_array($uniqueKey, ['cache-control', 'etag', 'last-modified', 'expires'], true)) {
             $computed = $this->computeCacheControlValue();
-            $this->headers['cache-control'] = array($computed);
+            $this->headers['cache-control'] = [$computed];
             $this->headerNames['cache-control'] = 'Cache-Control';
             $this->computedCacheControl = $this->parseCacheControl($computed);
         }
@@ -139,7 +139,7 @@ class ResponseHeaderBag extends HeaderBag
         unset($this->headerNames[$uniqueKey]);
 
         if ('set-cookie' === $uniqueKey) {
-            $this->cookies = array();
+            $this->cookies = [];
 
             return;
         }
@@ -147,7 +147,7 @@ class ResponseHeaderBag extends HeaderBag
         parent::remove($key);
 
         if ('cache-control' === $uniqueKey) {
-            $this->computedCacheControl = array();
+            $this->computedCacheControl = [];
         }
 
         if ('date' === $uniqueKey) {
@@ -216,15 +216,15 @@ class ResponseHeaderBag extends HeaderBag
      */
     public function getCookies($format = self::COOKIES_FLAT)
     {
-        if (!\in_array($format, array(self::COOKIES_FLAT, self::COOKIES_ARRAY))) {
-            throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', array(self::COOKIES_FLAT, self::COOKIES_ARRAY))));
+        if (!\in_array($format, [self::COOKIES_FLAT, self::COOKIES_ARRAY])) {
+            throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', [self::COOKIES_FLAT, self::COOKIES_ARRAY])));
         }
 
         if (self::COOKIES_ARRAY === $format) {
             return $this->cookies;
         }
 
-        $flattenedCookies = array();
+        $flattenedCookies = [];
         foreach ($this->cookies as $path) {
             foreach ($path as $cookies) {
                 foreach ($cookies as $cookie) {
diff --git a/src/Symfony/Component/HttpFoundation/ServerBag.php b/src/Symfony/Component/HttpFoundation/ServerBag.php
index d8ab561aaf..90da49fae5 100644
--- a/src/Symfony/Component/HttpFoundation/ServerBag.php
+++ b/src/Symfony/Component/HttpFoundation/ServerBag.php
@@ -27,8 +27,8 @@ class ServerBag extends ParameterBag
      */
     public function getHeaders()
     {
-        $headers = array();
-        $contentHeaders = array('CONTENT_LENGTH' => true, 'CONTENT_MD5' => true, 'CONTENT_TYPE' => true);
+        $headers = [];
+        $contentHeaders = ['CONTENT_LENGTH' => true, 'CONTENT_MD5' => true, 'CONTENT_TYPE' => true];
         foreach ($this->parameters as $key => $value) {
             if (0 === strpos($key, 'HTTP_')) {
                 $headers[substr($key, 5)] = $value;
diff --git a/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php b/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
index 82577b804e..7b53e7fc76 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Attribute/AttributeBag.php
@@ -19,7 +19,7 @@ class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Counta
     private $name = 'attributes';
     private $storageKey;
 
-    protected $attributes = array();
+    protected $attributes = [];
 
     /**
      * @param string $storageKey The key used to store attributes in the session
@@ -95,7 +95,7 @@ class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Counta
      */
     public function replace(array $attributes)
     {
-        $this->attributes = array();
+        $this->attributes = [];
         foreach ($attributes as $key => $value) {
             $this->set($key, $value);
         }
@@ -121,7 +121,7 @@ class AttributeBag implements AttributeBagInterface, \IteratorAggregate, \Counta
     public function clear()
     {
         $return = $this->attributes;
-        $this->attributes = array();
+        $this->attributes = [];
 
         return $return;
     }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php b/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
index 50cd740d95..7890214e82 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Attribute/NamespacedAttributeBag.php
@@ -115,7 +115,7 @@ class NamespacedAttributeBag extends AttributeBag
                 return $array;
             }
 
-            $array[$parts[0]] = array();
+            $array[$parts[0]] = [];
 
             return $array;
         }
@@ -130,7 +130,7 @@ class NamespacedAttributeBag extends AttributeBag
                     return $null;
                 }
 
-                $array[$part] = array();
+                $array[$part] = [];
             }
 
             $array = &$array[$part];
diff --git a/src/Symfony/Component/HttpFoundation/Session/Flash/AutoExpireFlashBag.php b/src/Symfony/Component/HttpFoundation/Session/Flash/AutoExpireFlashBag.php
index ef23457b41..782665caff 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Flash/AutoExpireFlashBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Flash/AutoExpireFlashBag.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\HttpFoundation\Session\Flash;
 class AutoExpireFlashBag implements FlashBagInterface
 {
     private $name = 'flashes';
-    private $flashes = array('display' => array(), 'new' => array());
+    private $flashes = ['display' => [], 'new' => []];
     private $storageKey;
 
     /**
@@ -53,8 +53,8 @@ class AutoExpireFlashBag implements FlashBagInterface
         // The logic: messages from the last request will be stored in new, so we move them to previous
         // This request we will show what is in 'display'.  What is placed into 'new' this time round will
         // be moved to display next time round.
-        $this->flashes['display'] = array_key_exists('new', $this->flashes) ? $this->flashes['new'] : array();
-        $this->flashes['new'] = array();
+        $this->flashes['display'] = array_key_exists('new', $this->flashes) ? $this->flashes['new'] : [];
+        $this->flashes['new'] = [];
     }
 
     /**
@@ -68,7 +68,7 @@ class AutoExpireFlashBag implements FlashBagInterface
     /**
      * {@inheritdoc}
      */
-    public function peek($type, array $default = array())
+    public function peek($type, array $default = [])
     {
         return $this->has($type) ? $this->flashes['display'][$type] : $default;
     }
@@ -78,13 +78,13 @@ class AutoExpireFlashBag implements FlashBagInterface
      */
     public function peekAll()
     {
-        return array_key_exists('display', $this->flashes) ? (array) $this->flashes['display'] : array();
+        return array_key_exists('display', $this->flashes) ? (array) $this->flashes['display'] : [];
     }
 
     /**
      * {@inheritdoc}
      */
-    public function get($type, array $default = array())
+    public function get($type, array $default = [])
     {
         $return = $default;
 
@@ -106,7 +106,7 @@ class AutoExpireFlashBag implements FlashBagInterface
     public function all()
     {
         $return = $this->flashes['display'];
-        $this->flashes['display'] = array();
+        $this->flashes['display'] = [];
 
         return $return;
     }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBag.php b/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBag.php
index 44ddb96330..9674e3514b 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBag.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\HttpFoundation\Session\Flash;
 class FlashBag implements FlashBagInterface
 {
     private $name = 'flashes';
-    private $flashes = array();
+    private $flashes = [];
     private $storageKey;
 
     /**
@@ -62,7 +62,7 @@ class FlashBag implements FlashBagInterface
     /**
      * {@inheritdoc}
      */
-    public function peek($type, array $default = array())
+    public function peek($type, array $default = [])
     {
         return $this->has($type) ? $this->flashes[$type] : $default;
     }
@@ -78,7 +78,7 @@ class FlashBag implements FlashBagInterface
     /**
      * {@inheritdoc}
      */
-    public function get($type, array $default = array())
+    public function get($type, array $default = [])
     {
         if (!$this->has($type)) {
             return $default;
@@ -97,7 +97,7 @@ class FlashBag implements FlashBagInterface
     public function all()
     {
         $return = $this->peekAll();
-        $this->flashes = array();
+        $this->flashes = [];
 
         return $return;
     }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBagInterface.php b/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBagInterface.php
index f53c9dae6c..2bd1d62bdb 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBagInterface.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Flash/FlashBagInterface.php
@@ -44,7 +44,7 @@ interface FlashBagInterface extends SessionBagInterface
      *
      * @return array
      */
-    public function peek($type, array $default = array());
+    public function peek($type, array $default = []);
 
     /**
      * Gets all flash messages.
@@ -61,7 +61,7 @@ interface FlashBagInterface extends SessionBagInterface
      *
      * @return array
      */
-    public function get($type, array $default = array());
+    public function get($type, array $default = []);
 
     /**
      * Gets and clears flashes from the stack.
diff --git a/src/Symfony/Component/HttpFoundation/Session/Session.php b/src/Symfony/Component/HttpFoundation/Session/Session.php
index 3349906875..867ceba97f 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Session.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Session.php
@@ -28,7 +28,7 @@ class Session implements SessionInterface, \IteratorAggregate, \Countable
 
     private $flashName;
     private $attributeName;
-    private $data = array();
+    private $data = [];
     private $usageIndex = 0;
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Session/SessionUtils.php b/src/Symfony/Component/HttpFoundation/Session/SessionUtils.php
index 91737c39ac..b5bce4a884 100644
--- a/src/Symfony/Component/HttpFoundation/Session/SessionUtils.php
+++ b/src/Symfony/Component/HttpFoundation/Session/SessionUtils.php
@@ -30,7 +30,7 @@ final class SessionUtils
         $sessionCookie = null;
         $sessionCookiePrefix = sprintf(' %s=', urlencode($sessionName));
         $sessionCookieWithId = sprintf('%s%s;', $sessionCookiePrefix, urlencode($sessionId));
-        $otherCookies = array();
+        $otherCookies = [];
         foreach (headers_list() as $h) {
             if (0 !== stripos($h, 'Set-Cookie:')) {
                 continue;
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/AbstractSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/AbstractSessionHandler.php
index 95f110332a..defca606ef 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/AbstractSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/AbstractSessionHandler.php
@@ -104,7 +104,7 @@ abstract class AbstractSessionHandler implements \SessionHandlerInterface, \Sess
     {
         if (null === $this->igbinaryEmptyData) {
             // see https://github.com/igbinary/igbinary/issues/146
-            $this->igbinaryEmptyData = \function_exists('igbinary_serialize') ? igbinary_serialize(array()) : '';
+            $this->igbinaryEmptyData = \function_exists('igbinary_serialize') ? igbinary_serialize([]) : '';
         }
         if ('' === $data || $this->igbinaryEmptyData === $data) {
             return $this->destroy($sessionId);
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
index 61a7afd904..3c3e3b2d22 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MemcachedSessionHandler.php
@@ -45,11 +45,11 @@ class MemcachedSessionHandler extends AbstractSessionHandler
      *
      * @throws \InvalidArgumentException When unsupported options are passed
      */
-    public function __construct(\Memcached $memcached, array $options = array())
+    public function __construct(\Memcached $memcached, array $options = [])
     {
         $this->memcached = $memcached;
 
-        if ($diff = array_diff(array_keys($options), array('prefix', 'expiretime'))) {
+        if ($diff = array_diff(array_keys($options), ['prefix', 'expiretime'])) {
             throw new \InvalidArgumentException(sprintf('The following options are not supported "%s"', implode(', ', $diff)));
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
index 853b0bc723..904dc1b523 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/MongoDbSessionHandler.php
@@ -74,12 +74,12 @@ class MongoDbSessionHandler extends AbstractSessionHandler
 
         $this->mongo = $mongo;
 
-        $this->options = array_merge(array(
+        $this->options = array_merge([
             'id_field' => '_id',
             'data_field' => 'data',
             'time_field' => 'time',
             'expiry_field' => 'expires_at',
-        ), $options);
+        ], $options);
     }
 
     /**
@@ -95,9 +95,9 @@ class MongoDbSessionHandler extends AbstractSessionHandler
      */
     protected function doDestroy($sessionId)
     {
-        $this->getCollection()->deleteOne(array(
+        $this->getCollection()->deleteOne([
             $this->options['id_field'] => $sessionId,
-        ));
+        ]);
 
         return true;
     }
@@ -107,9 +107,9 @@ class MongoDbSessionHandler extends AbstractSessionHandler
      */
     public function gc($maxlifetime)
     {
-        $this->getCollection()->deleteMany(array(
-            $this->options['expiry_field'] => array('$lt' => new \MongoDB\BSON\UTCDateTime()),
-        ));
+        $this->getCollection()->deleteMany([
+            $this->options['expiry_field'] => ['$lt' => new \MongoDB\BSON\UTCDateTime()],
+        ]);
 
         return true;
     }
@@ -121,16 +121,16 @@ class MongoDbSessionHandler extends AbstractSessionHandler
     {
         $expiry = new \MongoDB\BSON\UTCDateTime((time() + (int) ini_get('session.gc_maxlifetime')) * 1000);
 
-        $fields = array(
+        $fields = [
             $this->options['time_field'] => new \MongoDB\BSON\UTCDateTime(),
             $this->options['expiry_field'] => $expiry,
             $this->options['data_field'] => new \MongoDB\BSON\Binary($data, \MongoDB\BSON\Binary::TYPE_OLD_BINARY),
-        );
+        ];
 
         $this->getCollection()->updateOne(
-            array($this->options['id_field'] => $sessionId),
-            array('$set' => $fields),
-            array('upsert' => true)
+            [$this->options['id_field'] => $sessionId],
+            ['$set' => $fields],
+            ['upsert' => true]
         );
 
         return true;
@@ -144,11 +144,11 @@ class MongoDbSessionHandler extends AbstractSessionHandler
         $expiry = new \MongoDB\BSON\UTCDateTime((time() + (int) ini_get('session.gc_maxlifetime')) * 1000);
 
         $this->getCollection()->updateOne(
-            array($this->options['id_field'] => $sessionId),
-            array('$set' => array(
+            [$this->options['id_field'] => $sessionId],
+            ['$set' => [
                 $this->options['time_field'] => new \MongoDB\BSON\UTCDateTime(),
                 $this->options['expiry_field'] => $expiry,
-            ))
+            ]]
         );
 
         return true;
@@ -159,10 +159,10 @@ class MongoDbSessionHandler extends AbstractSessionHandler
      */
     protected function doRead($sessionId)
     {
-        $dbData = $this->getCollection()->findOne(array(
+        $dbData = $this->getCollection()->findOne([
             $this->options['id_field'] => $sessionId,
-            $this->options['expiry_field'] => array('$gte' => new \MongoDB\BSON\UTCDateTime()),
-        ));
+            $this->options['expiry_field'] => ['$gte' => new \MongoDB\BSON\UTCDateTime()],
+        ]);
 
         if (null === $dbData) {
             return '';
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index 1bb647ef42..0623318d0a 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -118,7 +118,7 @@ class PdoSessionHandler extends AbstractSessionHandler
     /**
      * @var array Connection options when lazy-connect
      */
-    private $connectionOptions = array();
+    private $connectionOptions = [];
 
     /**
      * @var int The strategy for locking, see constants
@@ -130,7 +130,7 @@ class PdoSessionHandler extends AbstractSessionHandler
      *
      * @var \PDOStatement[] An array of statements to release advisory locks
      */
-    private $unlockStatements = array();
+    private $unlockStatements = [];
 
     /**
      * @var bool True when the current session exists but expired according to session.gc_maxlifetime
@@ -161,7 +161,7 @@ class PdoSessionHandler extends AbstractSessionHandler
      *  * db_time_col: The column where to store the timestamp [default: sess_time]
      *  * db_username: The username when lazy-connect [default: '']
      *  * db_password: The password when lazy-connect [default: '']
-     *  * db_connection_options: An array of driver-specific connection options [default: array()]
+     *  * db_connection_options: An array of driver-specific connection options [default: []]
      *  * lock_mode: The strategy for locking, see constants [default: LOCK_TRANSACTIONAL]
      *
      * @param \PDO|string|null $pdoOrDsn A \PDO instance or DSN string or URL string or null
@@ -169,7 +169,7 @@ class PdoSessionHandler extends AbstractSessionHandler
      *
      * @throws \InvalidArgumentException When PDO error mode is not PDO::ERRMODE_EXCEPTION
      */
-    public function __construct($pdoOrDsn = null, array $options = array())
+    public function __construct($pdoOrDsn = null, array $options = [])
     {
         if ($pdoOrDsn instanceof \PDO) {
             if (\PDO::ERRMODE_EXCEPTION !== $pdoOrDsn->getAttribute(\PDO::ATTR_ERRMODE)) {
@@ -468,13 +468,13 @@ class PdoSessionHandler extends AbstractSessionHandler
             throw new \InvalidArgumentException('URLs without scheme are not supported to configure the PdoSessionHandler');
         }
 
-        $driverAliasMap = array(
+        $driverAliasMap = [
             'mssql' => 'sqlsrv',
             'mysql2' => 'mysql', // Amazon RDS, for some weird reason
             'postgres' => 'pgsql',
             'postgresql' => 'pgsql',
             'sqlite3' => 'sqlite',
-        );
+        ];
 
         $driver = isset($driverAliasMap[$params['scheme']]) ? $driverAliasMap[$params['scheme']] : $params['scheme'];
 
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
index 9c08ddcc01..a6498b882c 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/RedisSessionHandler.php
@@ -39,7 +39,7 @@ class RedisSessionHandler extends AbstractSessionHandler
      *
      * @throws \InvalidArgumentException When unsupported client or options are passed
      */
-    public function __construct($redis, array $options = array())
+    public function __construct($redis, array $options = [])
     {
         if (
             !$redis instanceof \Redis &&
@@ -52,7 +52,7 @@ class RedisSessionHandler extends AbstractSessionHandler
             throw new \InvalidArgumentException(sprintf('%s() expects parameter 1 to be Redis, RedisArray, RedisCluster or Predis\Client, %s given', __METHOD__, \is_object($redis) ? \get_class($redis) : \gettype($redis)));
         }
 
-        if ($diff = array_diff(array_keys($options), array('prefix'))) {
+        if ($diff = array_diff(array_keys($options), ['prefix'])) {
             throw new \InvalidArgumentException(sprintf('The following options are not supported "%s"', implode(', ', $diff)));
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/MetadataBag.php b/src/Symfony/Component/HttpFoundation/Session/Storage/MetadataBag.php
index ea0d5ecb51..2eff4109b4 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/MetadataBag.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/MetadataBag.php
@@ -39,7 +39,7 @@ class MetadataBag implements SessionBagInterface
     /**
      * @var array
      */
-    protected $meta = array(self::CREATED => 0, self::UPDATED => 0, self::LIFETIME => 0);
+    protected $meta = [self::CREATED => 0, self::UPDATED => 0, self::LIFETIME => 0];
 
     /**
      * Unix timestamp.
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/MockArraySessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/MockArraySessionStorage.php
index 47cac39854..37b6f145b8 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/MockArraySessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/MockArraySessionStorage.php
@@ -50,7 +50,7 @@ class MockArraySessionStorage implements SessionStorageInterface
     /**
      * @var array
      */
-    protected $data = array();
+    protected $data = [];
 
     /**
      * @var MetadataBag
@@ -60,7 +60,7 @@ class MockArraySessionStorage implements SessionStorageInterface
     /**
      * @var array|SessionBagInterface[]
      */
-    protected $bags = array();
+    protected $bags = [];
 
     public function __construct(string $name = 'MOCKSESSID', MetadataBag $metaBag = null)
     {
@@ -166,7 +166,7 @@ class MockArraySessionStorage implements SessionStorageInterface
         }
 
         // clear out the session
-        $this->data = array();
+        $this->data = [];
 
         // reconnect the bags to the session
         $this->loadSession();
@@ -238,11 +238,11 @@ class MockArraySessionStorage implements SessionStorageInterface
 
     protected function loadSession()
     {
-        $bags = array_merge($this->bags, array($this->metadataBag));
+        $bags = array_merge($this->bags, [$this->metadataBag]);
 
         foreach ($bags as $bag) {
             $key = $bag->getStorageKey();
-            $this->data[$key] = isset($this->data[$key]) ? $this->data[$key] : array();
+            $this->data[$key] = isset($this->data[$key]) ? $this->data[$key] : [];
             $bag->initialize($this->data[$key]);
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/MockFileSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/MockFileSessionStorage.php
index 732f92abf9..c0316c2c74 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/MockFileSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/MockFileSessionStorage.php
@@ -98,7 +98,7 @@ class MockFileSessionStorage extends MockArraySessionStorage
                 unset($data[$key]);
             }
         }
-        if (array($key = $this->metadataBag->getStorageKey()) === array_keys($data)) {
+        if ([$key = $this->metadataBag->getStorageKey()] === array_keys($data)) {
             unset($data[$key]);
         }
 
@@ -145,7 +145,7 @@ class MockFileSessionStorage extends MockArraySessionStorage
     private function read()
     {
         $filePath = $this->getFilePath();
-        $this->data = is_readable($filePath) && is_file($filePath) ? unserialize(file_get_contents($filePath)) : array();
+        $this->data = is_readable($filePath) && is_file($filePath) ? unserialize(file_get_contents($filePath)) : [];
 
         $this->loadSession();
     }
diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
index 232eb64cfd..ce7027954e 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -27,7 +27,7 @@ class NativeSessionStorage implements SessionStorageInterface
     /**
      * @var SessionBagInterface[]
      */
-    protected $bags = array();
+    protected $bags = [];
 
     /**
      * @var bool
@@ -101,15 +101,15 @@ class NativeSessionStorage implements SessionStorageInterface
      * @param \SessionHandlerInterface|null $handler
      * @param MetadataBag                   $metaBag MetadataBag
      */
-    public function __construct(array $options = array(), $handler = null, MetadataBag $metaBag = null)
+    public function __construct(array $options = [], $handler = null, MetadataBag $metaBag = null)
     {
-        $options += array(
+        $options += [
             'cache_limiter' => '',
             'cache_expire' => 0,
             'use_cookies' => 1,
             'lazy_write' => 1,
             'use_strict_mode' => 1,
-        );
+        ];
 
         session_register_shutdown();
 
@@ -244,7 +244,7 @@ class NativeSessionStorage implements SessionStorageInterface
                 unset($_SESSION[$key]);
             }
         }
-        if (array($key = $this->metadataBag->getStorageKey()) === array_keys($_SESSION)) {
+        if ([$key = $this->metadataBag->getStorageKey()] === array_keys($_SESSION)) {
             unset($_SESSION[$key]);
         }
 
@@ -280,7 +280,7 @@ class NativeSessionStorage implements SessionStorageInterface
         }
 
         // clear out the session
-        $_SESSION = array();
+        $_SESSION = [];
 
         // reconnect the bags to the session
         $this->loadSession();
@@ -349,7 +349,7 @@ class NativeSessionStorage implements SessionStorageInterface
      * For convenience we omit 'session.' from the beginning of the keys.
      * Explicitly ignores other ini keys.
      *
-     * @param array $options Session ini directives array(key => value)
+     * @param array $options Session ini directives [key => value]
      *
      * @see http://php.net/session.configuration
      */
@@ -359,7 +359,7 @@ class NativeSessionStorage implements SessionStorageInterface
             return;
         }
 
-        $validOptions = array_flip(array(
+        $validOptions = array_flip([
             'cache_expire', 'cache_limiter', 'cookie_domain', 'cookie_httponly',
             'cookie_lifetime', 'cookie_path', 'cookie_secure', 'cookie_samesite',
             'gc_divisor', 'gc_maxlifetime', 'gc_probability',
@@ -369,7 +369,7 @@ class NativeSessionStorage implements SessionStorageInterface
             'upload_progress.cleanup', 'upload_progress.prefix', 'upload_progress.name',
             'upload_progress.freq', 'upload_progress.min_freq', 'url_rewriter.tags',
             'sid_length', 'sid_bits_per_character', 'trans_sid_hosts', 'trans_sid_tags',
-        ));
+        ]);
 
         foreach ($options as $key => $value) {
             if (isset($validOptions[$key])) {
@@ -445,11 +445,11 @@ class NativeSessionStorage implements SessionStorageInterface
             $session = &$_SESSION;
         }
 
-        $bags = array_merge($this->bags, array($this->metadataBag));
+        $bags = array_merge($this->bags, [$this->metadataBag]);
 
         foreach ($bags as $bag) {
             $key = $bag->getStorageKey();
-            $session[$key] = isset($session[$key]) ? $session[$key] : array();
+            $session[$key] = isset($session[$key]) ? $session[$key] : [];
             $bag->initialize($session[$key]);
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/StreamedResponse.php b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
index d3bcbb79d3..8310ea72d6 100644
--- a/src/Symfony/Component/HttpFoundation/StreamedResponse.php
+++ b/src/Symfony/Component/HttpFoundation/StreamedResponse.php
@@ -35,7 +35,7 @@ class StreamedResponse extends Response
      * @param int           $status   The response status code
      * @param array         $headers  An array of response headers
      */
-    public function __construct(callable $callback = null, int $status = 200, array $headers = array())
+    public function __construct(callable $callback = null, int $status = 200, array $headers = [])
     {
         parent::__construct(null, $status, $headers);
 
@@ -55,7 +55,7 @@ class StreamedResponse extends Response
      *
      * @return static
      */
-    public static function create($callback = null, $status = 200, $headers = array())
+    public static function create($callback = null, $status = 200, $headers = [])
     {
         return new static($callback, $status, $headers);
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
index 1a660247c8..516bd5551a 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderItemTest.php
@@ -28,24 +28,24 @@ class AcceptHeaderItemTest extends TestCase
 
     public function provideFromStringData()
     {
-        return array(
-            array(
+        return [
+            [
                 'text/html',
-                'text/html', array(),
-            ),
-            array(
+                'text/html', [],
+            ],
+            [
                 '"this;should,not=matter"',
-                'this;should,not=matter', array(),
-            ),
-            array(
+                'this;should,not=matter', [],
+            ],
+            [
                 "text/plain; charset=utf-8;param=\"this;should,not=matter\";\tfootnotes=true",
-                'text/plain', array('charset' => 'utf-8', 'param' => 'this;should,not=matter', 'footnotes' => 'true'),
-            ),
-            array(
+                'text/plain', ['charset' => 'utf-8', 'param' => 'this;should,not=matter', 'footnotes' => 'true'],
+            ],
+            [
                 '"this;should,not=matter";charset=utf-8',
-                'this;should,not=matter', array('charset' => 'utf-8'),
-            ),
-        );
+                'this;should,not=matter', ['charset' => 'utf-8'],
+            ],
+        ];
     }
 
     /**
@@ -59,21 +59,21 @@ class AcceptHeaderItemTest extends TestCase
 
     public function provideToStringData()
     {
-        return array(
-            array(
-                'text/html', array(),
+        return [
+            [
+                'text/html', [],
                 'text/html',
-            ),
-            array(
-                'text/plain', array('charset' => 'utf-8', 'param' => 'this;should,not=matter', 'footnotes' => 'true'),
+            ],
+            [
+                'text/plain', ['charset' => 'utf-8', 'param' => 'this;should,not=matter', 'footnotes' => 'true'],
                 'text/plain; charset=utf-8; param="this;should,not=matter"; footnotes=true',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testValue()
     {
-        $item = new AcceptHeaderItem('value', array());
+        $item = new AcceptHeaderItem('value', []);
         $this->assertEquals('value', $item->getValue());
 
         $item->setValue('new value');
@@ -85,7 +85,7 @@ class AcceptHeaderItemTest extends TestCase
 
     public function testQuality()
     {
-        $item = new AcceptHeaderItem('value', array());
+        $item = new AcceptHeaderItem('value', []);
         $this->assertEquals(1.0, $item->getQuality());
 
         $item->setQuality(0.5);
@@ -98,14 +98,14 @@ class AcceptHeaderItemTest extends TestCase
 
     public function testAttribute()
     {
-        $item = new AcceptHeaderItem('value', array());
-        $this->assertEquals(array(), $item->getAttributes());
+        $item = new AcceptHeaderItem('value', []);
+        $this->assertEquals([], $item->getAttributes());
         $this->assertFalse($item->hasAttribute('test'));
         $this->assertNull($item->getAttribute('test'));
         $this->assertEquals('default', $item->getAttribute('test', 'default'));
 
         $item->setAttribute('test', 'value');
-        $this->assertEquals(array('test' => 'value'), $item->getAttributes());
+        $this->assertEquals(['test' => 'value'], $item->getAttributes());
         $this->assertTrue($item->hasAttribute('test'));
         $this->assertEquals('value', $item->getAttribute('test'));
         $this->assertEquals('value', $item->getAttribute('test', 'default'));
diff --git a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
index 1ac6103e0d..1987e97fb8 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/AcceptHeaderTest.php
@@ -39,13 +39,13 @@ class AcceptHeaderTest extends TestCase
 
     public function provideFromStringData()
     {
-        return array(
-            array('', array()),
-            array('gzip', array(new AcceptHeaderItem('gzip'))),
-            array('gzip,deflate,sdch', array(new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch'))),
-            array("gzip, deflate\t,sdch", array(new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch'))),
-            array('"this;should,not=matter"', array(new AcceptHeaderItem('this;should,not=matter'))),
-        );
+        return [
+            ['', []],
+            ['gzip', [new AcceptHeaderItem('gzip')]],
+            ['gzip,deflate,sdch', [new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch')]],
+            ["gzip, deflate\t,sdch", [new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch')]],
+            ['"this;should,not=matter"', [new AcceptHeaderItem('this;should,not=matter')]],
+        ];
     }
 
     /**
@@ -59,12 +59,12 @@ class AcceptHeaderTest extends TestCase
 
     public function provideToStringData()
     {
-        return array(
-            array(array(), ''),
-            array(array(new AcceptHeaderItem('gzip')), 'gzip'),
-            array(array(new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch')), 'gzip,deflate,sdch'),
-            array(array(new AcceptHeaderItem('this;should,not=matter')), 'this;should,not=matter'),
-        );
+        return [
+            [[], ''],
+            [[new AcceptHeaderItem('gzip')], 'gzip'],
+            [[new AcceptHeaderItem('gzip'), new AcceptHeaderItem('deflate'), new AcceptHeaderItem('sdch')], 'gzip,deflate,sdch'],
+            [[new AcceptHeaderItem('this;should,not=matter')], 'this;should,not=matter'],
+        ];
     }
 
     /**
@@ -78,9 +78,9 @@ class AcceptHeaderTest extends TestCase
 
     public function provideFilterData()
     {
-        return array(
-            array('fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4', '/fr.*/', array('fr-FR', 'fr')),
-        );
+        return [
+            ['fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4', '/fr.*/', ['fr-FR', 'fr']],
+        ];
     }
 
     /**
@@ -94,11 +94,11 @@ class AcceptHeaderTest extends TestCase
 
     public function provideSortingData()
     {
-        return array(
-            'quality has priority' => array('*;q=0.3,ISO-8859-1,utf-8;q=0.7',  array('ISO-8859-1', 'utf-8', '*')),
-            'order matters when q is equal' => array('*;q=0.3,ISO-8859-1;q=0.7,utf-8;q=0.7',  array('ISO-8859-1', 'utf-8', '*')),
-            'order matters when q is equal2' => array('*;q=0.3,utf-8;q=0.7,ISO-8859-1;q=0.7',  array('utf-8', 'ISO-8859-1', '*')),
-        );
+        return [
+            'quality has priority' => ['*;q=0.3,ISO-8859-1,utf-8;q=0.7', ['ISO-8859-1', 'utf-8', '*']],
+            'order matters when q is equal' => ['*;q=0.3,ISO-8859-1;q=0.7,utf-8;q=0.7', ['ISO-8859-1', 'utf-8', '*']],
+            'order matters when q is equal2' => ['*;q=0.3,utf-8;q=0.7,ISO-8859-1;q=0.7', ['utf-8', 'ISO-8859-1', '*']],
+        ];
     }
 
     /**
@@ -112,19 +112,19 @@ class AcceptHeaderTest extends TestCase
 
     public function provideDefaultValueData()
     {
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, *;q=0.3', 'text/xml', 0.3);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/xml', 0.3);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/html', 1.0);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/plain', 0.5);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', '*', 0.3);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', '*', 1.0);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', 'text/xml', 1.0);
-        yield array('text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', 'text/*', 1.0);
-        yield array('text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/*', 0.8);
-        yield array('text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/html', 1.0);
-        yield array('text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/x-dvi', 0.8);
-        yield array('*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', '*', 0.3);
-        yield array('*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', 'utf-8', 0.7);
-        yield array('*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', 'SHIFT_JIS', 0.3);
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, *;q=0.3', 'text/xml', 0.3];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/xml', 0.3];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/html', 1.0];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', 'text/plain', 0.5];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*;q=0.3', '*', 0.3];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', '*', 1.0];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', 'text/xml', 1.0];
+        yield ['text/plain;q=0.5, text/html, text/x-dvi;q=0.8, */*', 'text/*', 1.0];
+        yield ['text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/*', 0.8];
+        yield ['text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/html', 1.0];
+        yield ['text/plain;q=0.5, text/html, text/*;q=0.8, */*', 'text/x-dvi', 0.8];
+        yield ['*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', '*', 0.3];
+        yield ['*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', 'utf-8', 0.7];
+        yield ['*;q=0.3, ISO-8859-1;q=0.7, utf-8;q=0.7', 'SHIFT_JIS', 0.3];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php b/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
index 157ab90ec5..6fa3b88917 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ApacheRequestTest.php
@@ -31,63 +31,63 @@ class ApacheRequestTest extends TestCase
 
     public function provideServerVars()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'REQUEST_URI' => '/foo/app_dev.php/bar',
                     'SCRIPT_NAME' => '/foo/app_dev.php',
                     'PATH_INFO' => '/bar',
-                ),
+                ],
                 '/foo/app_dev.php/bar',
                 '/foo/app_dev.php',
                 '/bar',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'REQUEST_URI' => '/foo/bar',
                     'SCRIPT_NAME' => '/foo/app_dev.php',
-                ),
+                ],
                 '/foo/bar',
                 '/foo',
                 '/bar',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'REQUEST_URI' => '/app_dev.php/foo/bar',
                     'SCRIPT_NAME' => '/app_dev.php',
                     'PATH_INFO' => '/foo/bar',
-                ),
+                ],
                 '/app_dev.php/foo/bar',
                 '/app_dev.php',
                 '/foo/bar',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'REQUEST_URI' => '/foo/bar',
                     'SCRIPT_NAME' => '/app_dev.php',
-                ),
+                ],
                 '/foo/bar',
                 '',
                 '/foo/bar',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'REQUEST_URI' => '/app_dev.php',
                     'SCRIPT_NAME' => '/app_dev.php',
-                ),
+                ],
                 '/app_dev.php',
                 '/app_dev.php',
                 '/',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'REQUEST_URI' => '/',
                     'SCRIPT_NAME' => '/app_dev.php',
-                ),
+                ],
                 '/',
                 '',
                 '/',
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
index 6bf04e16b7..9f3beb08d1 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/BinaryFileResponseTest.php
@@ -22,14 +22,14 @@ class BinaryFileResponseTest extends ResponseTestCase
     public function testConstruction()
     {
         $file = __DIR__.'/../README.md';
-        $response = new BinaryFileResponse($file, 404, array('X-Header' => 'Foo'), true, null, true, true);
+        $response = new BinaryFileResponse($file, 404, ['X-Header' => 'Foo'], true, null, true, true);
         $this->assertEquals(404, $response->getStatusCode());
         $this->assertEquals('Foo', $response->headers->get('X-Header'));
         $this->assertTrue($response->headers->has('ETag'));
         $this->assertTrue($response->headers->has('Last-Modified'));
         $this->assertFalse($response->headers->has('Content-Disposition'));
 
-        $response = BinaryFileResponse::create($file, 404, array(), true, ResponseHeaderBag::DISPOSITION_INLINE);
+        $response = BinaryFileResponse::create($file, 404, [], true, ResponseHeaderBag::DISPOSITION_INLINE);
         $this->assertEquals(404, $response->getStatusCode());
         $this->assertFalse($response->headers->has('ETag'));
         $this->assertEquals('inline; filename=README.md', $response->headers->get('Content-Disposition'));
@@ -39,7 +39,7 @@ class BinaryFileResponseTest extends ResponseTestCase
     {
         touch(sys_get_temp_dir().'/fööö.html');
 
-        $response = new BinaryFileResponse(sys_get_temp_dir().'/fööö.html', 200, array(), true, 'attachment');
+        $response = new BinaryFileResponse(sys_get_temp_dir().'/fööö.html', 200, [], true, 'attachment');
 
         @unlink(sys_get_temp_dir().'/fööö.html');
 
@@ -85,7 +85,7 @@ class BinaryFileResponseTest extends ResponseTestCase
      */
     public function testRequests($requestRange, $offset, $length, $responseRange)
     {
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'))->setAutoEtag();
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream'])->setAutoEtag();
 
         // do a request to get the ETag
         $request = Request::create('/');
@@ -117,7 +117,7 @@ class BinaryFileResponseTest extends ResponseTestCase
      */
     public function testRequestsWithoutEtag($requestRange, $offset, $length, $responseRange)
     {
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'));
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream']);
 
         // do a request to get the LastModified
         $request = Request::create('/');
@@ -145,19 +145,19 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     public function provideRanges()
     {
-        return array(
-            array('bytes=1-4', 1, 4, 'bytes 1-4/35'),
-            array('bytes=-5', 30, 5, 'bytes 30-34/35'),
-            array('bytes=30-', 30, 5, 'bytes 30-34/35'),
-            array('bytes=30-30', 30, 1, 'bytes 30-30/35'),
-            array('bytes=30-34', 30, 5, 'bytes 30-34/35'),
-        );
+        return [
+            ['bytes=1-4', 1, 4, 'bytes 1-4/35'],
+            ['bytes=-5', 30, 5, 'bytes 30-34/35'],
+            ['bytes=30-', 30, 5, 'bytes 30-34/35'],
+            ['bytes=30-30', 30, 1, 'bytes 30-30/35'],
+            ['bytes=30-34', 30, 5, 'bytes 30-34/35'],
+        ];
     }
 
     public function testRangeRequestsWithoutLastModifiedDate()
     {
         // prevent auto last modified
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'), true, null, false, false);
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream'], true, null, false, false);
 
         // prepare a request for a range of the testing file
         $request = Request::create('/');
@@ -178,7 +178,7 @@ class BinaryFileResponseTest extends ResponseTestCase
      */
     public function testFullFileRequests($requestRange)
     {
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'))->setAutoEtag();
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream'])->setAutoEtag();
 
         // prepare a request for a range of the testing file
         $request = Request::create('/');
@@ -198,14 +198,14 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     public function provideFullFileRanges()
     {
-        return array(
-            array('bytes=0-'),
-            array('bytes=0-34'),
-            array('bytes=-35'),
+        return [
+            ['bytes=0-'],
+            ['bytes=0-34'],
+            ['bytes=-35'],
             // Syntactical invalid range-request should also return the full resource
-            array('bytes=20-10'),
-            array('bytes=50-40'),
-        );
+            ['bytes=20-10'],
+            ['bytes=50-40'],
+        ];
     }
 
     public function testUnpreparedResponseSendsFullFile()
@@ -226,7 +226,7 @@ class BinaryFileResponseTest extends ResponseTestCase
      */
     public function testInvalidRequests($requestRange)
     {
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'))->setAutoEtag();
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream'])->setAutoEtag();
 
         // prepare a request for a range of the testing file
         $request = Request::create('/');
@@ -242,10 +242,10 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     public function provideInvalidRanges()
     {
-        return array(
-            array('bytes=-40'),
-            array('bytes=30-40'),
-        );
+        return [
+            ['bytes=-40'],
+            ['bytes=30-40'],
+        ];
     }
 
     /**
@@ -257,7 +257,7 @@ class BinaryFileResponseTest extends ResponseTestCase
         $request->headers->set('X-Sendfile-Type', 'X-Sendfile');
 
         BinaryFileResponse::trustXSendfileTypeHeader();
-        $response = BinaryFileResponse::create($file, 200, array('Content-Type' => 'application/octet-stream'));
+        $response = BinaryFileResponse::create($file, 200, ['Content-Type' => 'application/octet-stream']);
         $response->prepare($request);
 
         $this->expectOutputString('');
@@ -268,10 +268,10 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     public function provideXSendfileFiles()
     {
-        return array(
-            array(__DIR__.'/../README.md'),
-            array('file://'.__DIR__.'/../README.md'),
-        );
+        return [
+            [__DIR__.'/../README.md'],
+            ['file://'.__DIR__.'/../README.md'],
+        ];
     }
 
     /**
@@ -286,7 +286,7 @@ class BinaryFileResponseTest extends ResponseTestCase
         $file = new FakeFile($realpath, __DIR__.'/File/Fixtures/test');
 
         BinaryFileResponse::trustXSendfileTypeHeader();
-        $response = new BinaryFileResponse($file, 200, array('Content-Type' => 'application/octet-stream'));
+        $response = new BinaryFileResponse($file, 200, ['Content-Type' => 'application/octet-stream']);
         $reflection = new \ReflectionObject($response);
         $property = $reflection->getProperty('file');
         $property->setAccessible(true);
@@ -305,7 +305,7 @@ class BinaryFileResponseTest extends ResponseTestCase
         $realPath = realpath($path);
         $this->assertFileExists($realPath);
 
-        $response = new BinaryFileResponse($realPath, 200, array('Content-Type' => 'application/octet-stream'));
+        $response = new BinaryFileResponse($realPath, 200, ['Content-Type' => 'application/octet-stream']);
         $response->deleteFileAfterSend(true);
 
         $response->prepare($request);
@@ -317,7 +317,7 @@ class BinaryFileResponseTest extends ResponseTestCase
     public function testAcceptRangeOnUnsafeMethods()
     {
         $request = Request::create('/', 'POST');
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'));
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream']);
         $response->prepare($request);
 
         $this->assertEquals('none', $response->headers->get('Accept-Ranges'));
@@ -326,7 +326,7 @@ class BinaryFileResponseTest extends ResponseTestCase
     public function testAcceptRangeNotOverriden()
     {
         $request = Request::create('/', 'POST');
-        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, array('Content-Type' => 'application/octet-stream'));
+        $response = BinaryFileResponse::create(__DIR__.'/File/Fixtures/test.gif', 200, ['Content-Type' => 'application/octet-stream']);
         $response->headers->set('Accept-Ranges', 'foo');
         $response->prepare($request);
 
@@ -335,17 +335,17 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     public function getSampleXAccelMappings()
     {
-        return array(
-            array('/var/www/var/www/files/foo.txt', '/var/www/=/files/', '/files/var/www/files/foo.txt'),
-            array('/home/Foo/bar.txt', '/var/www/=/files/,/home/Foo/=/baz/', '/baz/bar.txt'),
-            array('/home/Foo/bar.txt', '"/var/www/"="/files/", "/home/Foo/"="/baz/"', '/baz/bar.txt'),
-        );
+        return [
+            ['/var/www/var/www/files/foo.txt', '/var/www/=/files/', '/files/var/www/files/foo.txt'],
+            ['/home/Foo/bar.txt', '/var/www/=/files/,/home/Foo/=/baz/', '/baz/bar.txt'],
+            ['/home/Foo/bar.txt', '"/var/www/"="/files/", "/home/Foo/"="/baz/"', '/baz/bar.txt'],
+        ];
     }
 
     public function testStream()
     {
         $request = Request::create('/');
-        $response = new BinaryFileResponse(new Stream(__DIR__.'/../README.md'), 200, array('Content-Type' => 'text/plain'));
+        $response = new BinaryFileResponse(new Stream(__DIR__.'/../README.md'), 200, ['Content-Type' => 'text/plain']);
         $response->prepare($request);
 
         $this->assertNull($response->headers->get('Content-Length'));
@@ -353,7 +353,7 @@ class BinaryFileResponseTest extends ResponseTestCase
 
     protected function provideResponse()
     {
-        return new BinaryFileResponse(__DIR__.'/../README.md', 200, array('Content-Type' => 'application/octet-stream'));
+        return new BinaryFileResponse(__DIR__.'/../README.md', 200, ['Content-Type' => 'application/octet-stream']);
     }
 
     public static function tearDownAfterClass()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
index 44981dff8b..4aa32eea45 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/CookieTest.php
@@ -26,17 +26,17 @@ class CookieTest extends TestCase
 {
     public function invalidNames()
     {
-        return array(
-            array(''),
-            array(',MyName'),
-            array(';MyName'),
-            array(' MyName'),
-            array("\tMyName"),
-            array("\rMyName"),
-            array("\nMyName"),
-            array("\013MyName"),
-            array("\014MyName"),
-        );
+        return [
+            [''],
+            [',MyName'],
+            [';MyName'],
+            [' MyName'],
+            ["\tMyName"],
+            ["\rMyName"],
+            ["\nMyName"],
+            ["\013MyName"],
+            ["\014MyName"],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php b/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
index 1152e46c0b..2afdade67d 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ExpressionRequestMatcherTest.php
@@ -55,15 +55,15 @@ class ExpressionRequestMatcherTest extends TestCase
 
     public function provideExpressions()
     {
-        return array(
-            array('request.getMethod() == method', true),
-            array('request.getPathInfo() == path', true),
-            array('request.getHost() == host', true),
-            array('request.getClientIp() == ip', true),
-            array('request.attributes.all() == attributes', true),
-            array('request.getMethod() == method && request.getPathInfo() == path && request.getHost() == host && request.getClientIp() == ip &&  request.attributes.all() == attributes', true),
-            array('request.getMethod() != method', false),
-            array('request.getMethod() != method && request.getPathInfo() == path && request.getHost() == host && request.getClientIp() == ip &&  request.attributes.all() == attributes', false),
-        );
+        return [
+            ['request.getMethod() == method', true],
+            ['request.getPathInfo() == path', true],
+            ['request.getHost() == host', true],
+            ['request.getClientIp() == ip', true],
+            ['request.attributes.all() == attributes', true],
+            ['request.getMethod() == method && request.getPathInfo() == path && request.getHost() == host && request.getClientIp() == ip &&  request.attributes.all() == attributes', true],
+            ['request.getMethod() != method', false],
+            ['request.getMethod() != method && request.getPathInfo() == path && request.getHost() == host && request.getClientIp() == ip &&  request.attributes.all() == attributes', false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
index 8935a4310c..c050fa519c 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/FileTest.php
@@ -110,14 +110,14 @@ class FileTest extends TestCase
 
     public function getFilenameFixtures()
     {
-        return array(
-            array('original.gif', 'original.gif'),
-            array('..\\..\\original.gif', 'original.gif'),
-            array('../../original.gif', 'original.gif'),
-            array('файлfile.gif', 'файлfile.gif'),
-            array('..\\..\\файлfile.gif', 'файлfile.gif'),
-            array('../../файлfile.gif', 'файлfile.gif'),
-        );
+        return [
+            ['original.gif', 'original.gif'],
+            ['..\\..\\original.gif', 'original.gif'],
+            ['../../original.gif', 'original.gif'],
+            ['файлfile.gif', 'файлfile.gif'],
+            ['..\\..\\файлfile.gif', 'файлfile.gif'],
+            ['../../файлfile.gif', 'файлfile.gif'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
index 89eb359dbc..54e2736bb7 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/File/UploadedFileTest.php
@@ -147,13 +147,13 @@ class UploadedFileTest extends TestCase
 
     public function failedUploadedFile()
     {
-        foreach (array(UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_EXTENSION, -1) as $error) {
-            yield array(new UploadedFile(
+        foreach ([UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_EXTENSION, -1] as $error) {
+            yield [new UploadedFile(
                 __DIR__.'/Fixtures/test.gif',
                 'original.gif',
                 'image/gif',
                 $error
-            ));
+            )];
         }
     }
 
@@ -323,13 +323,13 @@ class UploadedFileTest extends TestCase
 
     public function uploadedFileErrorProvider()
     {
-        return array(
-            array(UPLOAD_ERR_INI_SIZE),
-            array(UPLOAD_ERR_FORM_SIZE),
-            array(UPLOAD_ERR_PARTIAL),
-            array(UPLOAD_ERR_NO_TMP_DIR),
-            array(UPLOAD_ERR_EXTENSION),
-        );
+        return [
+            [UPLOAD_ERR_INI_SIZE],
+            [UPLOAD_ERR_FORM_SIZE],
+            [UPLOAD_ERR_PARTIAL],
+            [UPLOAD_ERR_NO_TMP_DIR],
+            [UPLOAD_ERR_EXTENSION],
+        ];
     }
 
     public function testIsInvalidIfNotHttpUpload()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
index 06136e2097..5eaf64f89f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/FileBagTest.php
@@ -28,7 +28,7 @@ class FileBagTest extends TestCase
      */
     public function testFileMustBeAnArrayOrUploadedFile()
     {
-        new FileBag(array('file' => 'foo'));
+        new FileBag(['file' => 'foo']);
     }
 
     public function testShouldConvertsUploadedFiles()
@@ -36,54 +36,54 @@ class FileBagTest extends TestCase
         $tmpFile = $this->createTempFile();
         $file = new UploadedFile($tmpFile, basename($tmpFile), 'text/plain');
 
-        $bag = new FileBag(array('file' => array(
+        $bag = new FileBag(['file' => [
             'name' => basename($tmpFile),
             'type' => 'text/plain',
             'tmp_name' => $tmpFile,
             'error' => 0,
             'size' => null,
-        )));
+        ]]);
 
         $this->assertEquals($file, $bag->get('file'));
     }
 
     public function testShouldSetEmptyUploadedFilesToNull()
     {
-        $bag = new FileBag(array('file' => array(
+        $bag = new FileBag(['file' => [
             'name' => '',
             'type' => '',
             'tmp_name' => '',
             'error' => UPLOAD_ERR_NO_FILE,
             'size' => 0,
-        )));
+        ]]);
 
         $this->assertNull($bag->get('file'));
     }
 
     public function testShouldRemoveEmptyUploadedFilesForMultiUpload()
     {
-        $bag = new FileBag(array('files' => array(
-            'name' => array(''),
-            'type' => array(''),
-            'tmp_name' => array(''),
-            'error' => array(UPLOAD_ERR_NO_FILE),
-            'size' => array(0),
-        )));
+        $bag = new FileBag(['files' => [
+            'name' => [''],
+            'type' => [''],
+            'tmp_name' => [''],
+            'error' => [UPLOAD_ERR_NO_FILE],
+            'size' => [0],
+        ]]);
 
-        $this->assertSame(array(), $bag->get('files'));
+        $this->assertSame([], $bag->get('files'));
     }
 
     public function testShouldNotRemoveEmptyUploadedFilesForAssociativeArray()
     {
-        $bag = new FileBag(array('files' => array(
-            'name' => array('file1' => ''),
-            'type' => array('file1' => ''),
-            'tmp_name' => array('file1' => ''),
-            'error' => array('file1' => UPLOAD_ERR_NO_FILE),
-            'size' => array('file1' => 0),
-        )));
+        $bag = new FileBag(['files' => [
+            'name' => ['file1' => ''],
+            'type' => ['file1' => ''],
+            'tmp_name' => ['file1' => ''],
+            'error' => ['file1' => UPLOAD_ERR_NO_FILE],
+            'size' => ['file1' => 0],
+        ]]);
 
-        $this->assertSame(array('file1' => null), $bag->get('files'));
+        $this->assertSame(['file1' => null], $bag->get('files'));
     }
 
     public function testShouldConvertUploadedFilesWithPhpBug()
@@ -91,25 +91,25 @@ class FileBagTest extends TestCase
         $tmpFile = $this->createTempFile();
         $file = new UploadedFile($tmpFile, basename($tmpFile), 'text/plain');
 
-        $bag = new FileBag(array(
-            'child' => array(
-                'name' => array(
+        $bag = new FileBag([
+            'child' => [
+                'name' => [
                     'file' => basename($tmpFile),
-                ),
-                'type' => array(
+                ],
+                'type' => [
                     'file' => 'text/plain',
-                ),
-                'tmp_name' => array(
+                ],
+                'tmp_name' => [
                     'file' => $tmpFile,
-                ),
-                'error' => array(
+                ],
+                'error' => [
                     'file' => 0,
-                ),
-                'size' => array(
+                ],
+                'size' => [
                     'file' => null,
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
         $files = $bag->all();
         $this->assertEquals($file, $files['child']['file']);
@@ -120,25 +120,25 @@ class FileBagTest extends TestCase
         $tmpFile = $this->createTempFile();
         $file = new UploadedFile($tmpFile, basename($tmpFile), 'text/plain');
 
-        $bag = new FileBag(array(
-            'child' => array(
-                'name' => array(
-                    'sub' => array('file' => basename($tmpFile)),
-                ),
-                'type' => array(
-                    'sub' => array('file' => 'text/plain'),
-                ),
-                'tmp_name' => array(
-                    'sub' => array('file' => $tmpFile),
-                ),
-                'error' => array(
-                    'sub' => array('file' => 0),
-                ),
-                'size' => array(
-                    'sub' => array('file' => null),
-                ),
-            ),
-        ));
+        $bag = new FileBag([
+            'child' => [
+                'name' => [
+                    'sub' => ['file' => basename($tmpFile)],
+                ],
+                'type' => [
+                    'sub' => ['file' => 'text/plain'],
+                ],
+                'tmp_name' => [
+                    'sub' => ['file' => $tmpFile],
+                ],
+                'error' => [
+                    'sub' => ['file' => 0],
+                ],
+                'size' => [
+                    'sub' => ['file' => null],
+                ],
+            ],
+        ]);
 
         $files = $bag->all();
         $this->assertEquals($file, $files['child']['sub']['file']);
@@ -148,7 +148,7 @@ class FileBagTest extends TestCase
     {
         $tmpFile = $this->createTempFile();
         $file = new UploadedFile($tmpFile, basename($tmpFile), 'text/plain');
-        $bag = new FileBag(array('image' => array('file' => $file)));
+        $bag = new FileBag(['image' => ['file' => $file]]);
 
         $files = $bag->all();
         $this->assertEquals($file, $files['image']['file']);
diff --git a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
index c5a437f999..6c4915f2e4 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/HeaderBagTest.php
@@ -18,7 +18,7 @@ class HeaderBagTest extends TestCase
 {
     public function testConstructor()
     {
-        $bag = new HeaderBag(array('foo' => 'bar'));
+        $bag = new HeaderBag(['foo' => 'bar']);
         $this->assertTrue($bag->has('foo'));
     }
 
@@ -30,20 +30,20 @@ class HeaderBagTest extends TestCase
 
     public function testToStringNotNull()
     {
-        $bag = new HeaderBag(array('foo' => 'bar'));
+        $bag = new HeaderBag(['foo' => 'bar']);
         $this->assertEquals("Foo: bar\r\n", $bag->__toString());
     }
 
     public function testKeys()
     {
-        $bag = new HeaderBag(array('foo' => 'bar'));
+        $bag = new HeaderBag(['foo' => 'bar']);
         $keys = $bag->keys();
         $this->assertEquals('foo', $keys[0]);
     }
 
     public function testGetDate()
     {
-        $bag = new HeaderBag(array('foo' => 'Tue, 4 Sep 2012 20:00:00 +0200'));
+        $bag = new HeaderBag(['foo' => 'Tue, 4 Sep 2012 20:00:00 +0200']);
         $headerDate = $bag->getDate('foo');
         $this->assertInstanceOf('DateTime', $headerDate);
     }
@@ -53,7 +53,7 @@ class HeaderBagTest extends TestCase
      */
     public function testGetDateException()
     {
-        $bag = new HeaderBag(array('foo' => 'Tue'));
+        $bag = new HeaderBag(['foo' => 'Tue']);
         $headerDate = $bag->getDate('foo');
     }
 
@@ -67,50 +67,50 @@ class HeaderBagTest extends TestCase
 
     public function testAll()
     {
-        $bag = new HeaderBag(array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => array('bar')), $bag->all(), '->all() gets all the input');
+        $bag = new HeaderBag(['foo' => 'bar']);
+        $this->assertEquals(['foo' => ['bar']], $bag->all(), '->all() gets all the input');
 
-        $bag = new HeaderBag(array('FOO' => 'BAR'));
-        $this->assertEquals(array('foo' => array('BAR')), $bag->all(), '->all() gets all the input key are lower case');
+        $bag = new HeaderBag(['FOO' => 'BAR']);
+        $this->assertEquals(['foo' => ['BAR']], $bag->all(), '->all() gets all the input key are lower case');
     }
 
     public function testReplace()
     {
-        $bag = new HeaderBag(array('foo' => 'bar'));
+        $bag = new HeaderBag(['foo' => 'bar']);
 
-        $bag->replace(array('NOPE' => 'BAR'));
-        $this->assertEquals(array('nope' => array('BAR')), $bag->all(), '->replace() replaces the input with the argument');
+        $bag->replace(['NOPE' => 'BAR']);
+        $this->assertEquals(['nope' => ['BAR']], $bag->all(), '->replace() replaces the input with the argument');
         $this->assertFalse($bag->has('foo'), '->replace() overrides previously set the input');
     }
 
     public function testGet()
     {
-        $bag = new HeaderBag(array('foo' => 'bar', 'fuzz' => 'bizz'));
+        $bag = new HeaderBag(['foo' => 'bar', 'fuzz' => 'bizz']);
         $this->assertEquals('bar', $bag->get('foo'), '->get return current value');
         $this->assertEquals('bar', $bag->get('FoO'), '->get key in case insensitive');
-        $this->assertEquals(array('bar'), $bag->get('foo', 'nope', false), '->get return the value as array');
+        $this->assertEquals(['bar'], $bag->get('foo', 'nope', false), '->get return the value as array');
 
         // defaults
         $this->assertNull($bag->get('none'), '->get unknown values returns null');
         $this->assertEquals('default', $bag->get('none', 'default'), '->get unknown values returns default');
-        $this->assertEquals(array('default'), $bag->get('none', 'default', false), '->get unknown values returns default as array');
+        $this->assertEquals(['default'], $bag->get('none', 'default', false), '->get unknown values returns default as array');
 
         $bag->set('foo', 'bor', false);
         $this->assertEquals('bar', $bag->get('foo'), '->get return first value');
-        $this->assertEquals(array('bar', 'bor'), $bag->get('foo', 'nope', false), '->get return all values as array');
+        $this->assertEquals(['bar', 'bor'], $bag->get('foo', 'nope', false), '->get return all values as array');
     }
 
     public function testSetAssociativeArray()
     {
         $bag = new HeaderBag();
-        $bag->set('foo', array('bad-assoc-index' => 'value'));
+        $bag->set('foo', ['bad-assoc-index' => 'value']);
         $this->assertSame('value', $bag->get('foo'));
-        $this->assertEquals(array('value'), $bag->get('foo', 'nope', false), 'assoc indices of multi-valued headers are ignored');
+        $this->assertEquals(['value'], $bag->get('foo', 'nope', false), 'assoc indices of multi-valued headers are ignored');
     }
 
     public function testContains()
     {
-        $bag = new HeaderBag(array('foo' => 'bar', 'fuzz' => 'bizz'));
+        $bag = new HeaderBag(['foo' => 'bar', 'fuzz' => 'bizz']);
         $this->assertTrue($bag->contains('foo', 'bar'), '->contains first value');
         $this->assertTrue($bag->contains('fuzz', 'bizz'), '->contains second value');
         $this->assertFalse($bag->contains('nope', 'nope'), '->contains unknown value');
@@ -143,7 +143,7 @@ class HeaderBagTest extends TestCase
 
     public function testCacheControlDirectiveParsing()
     {
-        $bag = new HeaderBag(array('cache-control' => 'public, max-age=10'));
+        $bag = new HeaderBag(['cache-control' => 'public, max-age=10']);
         $this->assertTrue($bag->hasCacheControlDirective('public'));
         $this->assertTrue($bag->getCacheControlDirective('public'));
 
@@ -156,15 +156,15 @@ class HeaderBagTest extends TestCase
 
     public function testCacheControlDirectiveParsingQuotedZero()
     {
-        $bag = new HeaderBag(array('cache-control' => 'max-age="0"'));
+        $bag = new HeaderBag(['cache-control' => 'max-age="0"']);
         $this->assertTrue($bag->hasCacheControlDirective('max-age'));
         $this->assertEquals(0, $bag->getCacheControlDirective('max-age'));
     }
 
     public function testCacheControlDirectiveOverrideWithReplace()
     {
-        $bag = new HeaderBag(array('cache-control' => 'private, max-age=100'));
-        $bag->replace(array('cache-control' => 'public, max-age=10'));
+        $bag = new HeaderBag(['cache-control' => 'private, max-age=100']);
+        $bag->replace(['cache-control' => 'public, max-age=10']);
         $this->assertTrue($bag->hasCacheControlDirective('public'));
         $this->assertTrue($bag->getCacheControlDirective('public'));
 
@@ -174,7 +174,7 @@ class HeaderBagTest extends TestCase
 
     public function testCacheControlClone()
     {
-        $headers = array('foo' => 'bar');
+        $headers = ['foo' => 'bar'];
         $bag1 = new HeaderBag($headers);
         $bag2 = new HeaderBag($bag1->all());
 
@@ -183,13 +183,13 @@ class HeaderBagTest extends TestCase
 
     public function testGetIterator()
     {
-        $headers = array('foo' => 'bar', 'hello' => 'world', 'third' => 'charm');
+        $headers = ['foo' => 'bar', 'hello' => 'world', 'third' => 'charm'];
         $headerBag = new HeaderBag($headers);
 
         $i = 0;
         foreach ($headerBag as $key => $val) {
             ++$i;
-            $this->assertEquals(array($headers[$key]), $val);
+            $this->assertEquals([$headers[$key]], $val);
         }
 
         $this->assertEquals(\count($headers), $i);
@@ -197,7 +197,7 @@ class HeaderBagTest extends TestCase
 
     public function testCount()
     {
-        $headers = array('foo' => 'bar', 'HELLO' => 'WORLD');
+        $headers = ['foo' => 'bar', 'HELLO' => 'WORLD'];
         $headerBag = new HeaderBag($headers);
 
         $this->assertCount(\count($headers), $headerBag);
diff --git a/src/Symfony/Component/HttpFoundation/Tests/HeaderUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/HeaderUtilsTest.php
index 15efdf9234..2f82dc4e67 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/HeaderUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/HeaderUtilsTest.php
@@ -18,48 +18,48 @@ class HeaderUtilsTest extends TestCase
 {
     public function testSplit()
     {
-        $this->assertSame(array('foo=123', 'bar'), HeaderUtils::split('foo=123,bar', ','));
-        $this->assertSame(array('foo=123', 'bar'), HeaderUtils::split('foo=123, bar', ','));
-        $this->assertSame(array(array('foo=123', 'bar')), HeaderUtils::split('foo=123; bar', ',;'));
-        $this->assertSame(array(array('foo=123'), array('bar')), HeaderUtils::split('foo=123, bar', ',;'));
-        $this->assertSame(array('foo', '123, bar'), HeaderUtils::split('foo=123, bar', '='));
-        $this->assertSame(array('foo', '123, bar'), HeaderUtils::split(' foo = 123, bar ', '='));
-        $this->assertSame(array(array('foo', '123'), array('bar')), HeaderUtils::split('foo=123, bar', ',='));
-        $this->assertSame(array(array(array('foo', '123')), array(array('bar'), array('foo', '456'))), HeaderUtils::split('foo=123, bar; foo=456', ',;='));
-        $this->assertSame(array(array(array('foo', 'a,b;c=d'))), HeaderUtils::split('foo="a,b;c=d"', ',;='));
+        $this->assertSame(['foo=123', 'bar'], HeaderUtils::split('foo=123,bar', ','));
+        $this->assertSame(['foo=123', 'bar'], HeaderUtils::split('foo=123, bar', ','));
+        $this->assertSame([['foo=123', 'bar']], HeaderUtils::split('foo=123; bar', ',;'));
+        $this->assertSame([['foo=123'], ['bar']], HeaderUtils::split('foo=123, bar', ',;'));
+        $this->assertSame(['foo', '123, bar'], HeaderUtils::split('foo=123, bar', '='));
+        $this->assertSame(['foo', '123, bar'], HeaderUtils::split(' foo = 123, bar ', '='));
+        $this->assertSame([['foo', '123'], ['bar']], HeaderUtils::split('foo=123, bar', ',='));
+        $this->assertSame([[['foo', '123']], [['bar'], ['foo', '456']]], HeaderUtils::split('foo=123, bar; foo=456', ',;='));
+        $this->assertSame([[['foo', 'a,b;c=d']]], HeaderUtils::split('foo="a,b;c=d"', ',;='));
 
-        $this->assertSame(array('foo', 'bar'), HeaderUtils::split('foo,,,, bar', ','));
-        $this->assertSame(array('foo', 'bar'), HeaderUtils::split(',foo, bar,', ','));
-        $this->assertSame(array('foo', 'bar'), HeaderUtils::split(' , foo, bar, ', ','));
-        $this->assertSame(array('foo bar'), HeaderUtils::split('foo "bar"', ','));
-        $this->assertSame(array('foo bar'), HeaderUtils::split('"foo" bar', ','));
-        $this->assertSame(array('foo bar'), HeaderUtils::split('"foo" "bar"', ','));
+        $this->assertSame(['foo', 'bar'], HeaderUtils::split('foo,,,, bar', ','));
+        $this->assertSame(['foo', 'bar'], HeaderUtils::split(',foo, bar,', ','));
+        $this->assertSame(['foo', 'bar'], HeaderUtils::split(' , foo, bar, ', ','));
+        $this->assertSame(['foo bar'], HeaderUtils::split('foo "bar"', ','));
+        $this->assertSame(['foo bar'], HeaderUtils::split('"foo" bar', ','));
+        $this->assertSame(['foo bar'], HeaderUtils::split('"foo" "bar"', ','));
 
         // These are not a valid header values. We test that they parse anyway,
         // and that both the valid and invalid parts are returned.
-        $this->assertSame(array(), HeaderUtils::split('', ','));
-        $this->assertSame(array(), HeaderUtils::split(',,,', ','));
-        $this->assertSame(array('foo', 'bar', 'baz'), HeaderUtils::split('foo, "bar", "baz', ','));
-        $this->assertSame(array('foo', 'bar, baz'), HeaderUtils::split('foo, "bar, baz', ','));
-        $this->assertSame(array('foo', 'bar, baz\\'), HeaderUtils::split('foo, "bar, baz\\', ','));
-        $this->assertSame(array('foo', 'bar, baz\\'), HeaderUtils::split('foo, "bar, baz\\\\', ','));
+        $this->assertSame([], HeaderUtils::split('', ','));
+        $this->assertSame([], HeaderUtils::split(',,,', ','));
+        $this->assertSame(['foo', 'bar', 'baz'], HeaderUtils::split('foo, "bar", "baz', ','));
+        $this->assertSame(['foo', 'bar, baz'], HeaderUtils::split('foo, "bar, baz', ','));
+        $this->assertSame(['foo', 'bar, baz\\'], HeaderUtils::split('foo, "bar, baz\\', ','));
+        $this->assertSame(['foo', 'bar, baz\\'], HeaderUtils::split('foo, "bar, baz\\\\', ','));
     }
 
     public function testCombine()
     {
-        $this->assertSame(array('foo' => '123'), HeaderUtils::combine(array(array('foo', '123'))));
-        $this->assertSame(array('foo' => true), HeaderUtils::combine(array(array('foo'))));
-        $this->assertSame(array('foo' => true), HeaderUtils::combine(array(array('Foo'))));
-        $this->assertSame(array('foo' => '123', 'bar' => true), HeaderUtils::combine(array(array('foo', '123'), array('bar'))));
+        $this->assertSame(['foo' => '123'], HeaderUtils::combine([['foo', '123']]));
+        $this->assertSame(['foo' => true], HeaderUtils::combine([['foo']]));
+        $this->assertSame(['foo' => true], HeaderUtils::combine([['Foo']]));
+        $this->assertSame(['foo' => '123', 'bar' => true], HeaderUtils::combine([['foo', '123'], ['bar']]));
     }
 
     public function testToString()
     {
-        $this->assertSame('foo', HeaderUtils::toString(array('foo' => true), ','));
-        $this->assertSame('foo; bar', HeaderUtils::toString(array('foo' => true, 'bar' => true), ';'));
-        $this->assertSame('foo=123', HeaderUtils::toString(array('foo' => '123'), ','));
-        $this->assertSame('foo="1 2 3"', HeaderUtils::toString(array('foo' => '1 2 3'), ','));
-        $this->assertSame('foo="1 2 3", bar', HeaderUtils::toString(array('foo' => '1 2 3', 'bar' => true), ','));
+        $this->assertSame('foo', HeaderUtils::toString(['foo' => true], ','));
+        $this->assertSame('foo; bar', HeaderUtils::toString(['foo' => true, 'bar' => true], ';'));
+        $this->assertSame('foo=123', HeaderUtils::toString(['foo' => '123'], ','));
+        $this->assertSame('foo="1 2 3"', HeaderUtils::toString(['foo' => '1 2 3'], ','));
+        $this->assertSame('foo="1 2 3", bar', HeaderUtils::toString(['foo' => '1 2 3', 'bar' => true], ','));
     }
 
     public function testQuote()
@@ -101,14 +101,14 @@ class HeaderUtilsTest extends TestCase
 
     public function provideMakeDisposition()
     {
-        return array(
-            array('attachment', 'foo.html', 'foo.html', 'attachment; filename=foo.html'),
-            array('attachment', 'foo.html', '', 'attachment; filename=foo.html'),
-            array('attachment', 'foo bar.html', '', 'attachment; filename="foo bar.html"'),
-            array('attachment', 'foo "bar".html', '', 'attachment; filename="foo \\"bar\\".html"'),
-            array('attachment', 'foo%20bar.html', 'foo bar.html', 'attachment; filename="foo bar.html"; filename*=utf-8\'\'foo%2520bar.html'),
-            array('attachment', 'föö.html', 'foo.html', 'attachment; filename=foo.html; filename*=utf-8\'\'f%C3%B6%C3%B6.html'),
-        );
+        return [
+            ['attachment', 'foo.html', 'foo.html', 'attachment; filename=foo.html'],
+            ['attachment', 'foo.html', '', 'attachment; filename=foo.html'],
+            ['attachment', 'foo bar.html', '', 'attachment; filename="foo bar.html"'],
+            ['attachment', 'foo "bar".html', '', 'attachment; filename="foo \\"bar\\".html"'],
+            ['attachment', 'foo%20bar.html', 'foo bar.html', 'attachment; filename="foo bar.html"; filename*=utf-8\'\'foo%2520bar.html'],
+            ['attachment', 'föö.html', 'foo.html', 'attachment; filename=foo.html; filename*=utf-8\'\'f%C3%B6%C3%B6.html'],
+        ];
     }
 
     /**
@@ -122,13 +122,13 @@ class HeaderUtilsTest extends TestCase
 
     public function provideMakeDispositionFail()
     {
-        return array(
-            array('attachment', 'foo%20bar.html'),
-            array('attachment', 'foo/bar.html'),
-            array('attachment', '/foo.html'),
-            array('attachment', 'foo\bar.html'),
-            array('attachment', '\foo.html'),
-            array('attachment', 'föö.html'),
-        );
+        return [
+            ['attachment', 'foo%20bar.html'],
+            ['attachment', 'foo/bar.html'],
+            ['attachment', '/foo.html'],
+            ['attachment', 'foo\bar.html'],
+            ['attachment', '\foo.html'],
+            ['attachment', 'föö.html'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
index 232a2040ff..c7f76b5de2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/IpUtilsTest.php
@@ -26,20 +26,20 @@ class IpUtilsTest extends TestCase
 
     public function getIpv4Data()
     {
-        return array(
-            array(true, '192.168.1.1', '192.168.1.1'),
-            array(true, '192.168.1.1', '192.168.1.1/1'),
-            array(true, '192.168.1.1', '192.168.1.0/24'),
-            array(false, '192.168.1.1', '1.2.3.4/1'),
-            array(false, '192.168.1.1', '192.168.1.1/33'), // invalid subnet
-            array(true, '192.168.1.1', array('1.2.3.4/1', '192.168.1.0/24')),
-            array(true, '192.168.1.1', array('192.168.1.0/24', '1.2.3.4/1')),
-            array(false, '192.168.1.1', array('1.2.3.4/1', '4.3.2.1/1')),
-            array(true, '1.2.3.4', '0.0.0.0/0'),
-            array(true, '1.2.3.4', '192.168.1.0/0'),
-            array(false, '1.2.3.4', '256.256.256/0'), // invalid CIDR notation
-            array(false, 'an_invalid_ip', '192.168.1.0/24'),
-        );
+        return [
+            [true, '192.168.1.1', '192.168.1.1'],
+            [true, '192.168.1.1', '192.168.1.1/1'],
+            [true, '192.168.1.1', '192.168.1.0/24'],
+            [false, '192.168.1.1', '1.2.3.4/1'],
+            [false, '192.168.1.1', '192.168.1.1/33'], // invalid subnet
+            [true, '192.168.1.1', ['1.2.3.4/1', '192.168.1.0/24']],
+            [true, '192.168.1.1', ['192.168.1.0/24', '1.2.3.4/1']],
+            [false, '192.168.1.1', ['1.2.3.4/1', '4.3.2.1/1']],
+            [true, '1.2.3.4', '0.0.0.0/0'],
+            [true, '1.2.3.4', '192.168.1.0/0'],
+            [false, '1.2.3.4', '256.256.256/0'], // invalid CIDR notation
+            [false, 'an_invalid_ip', '192.168.1.0/24'],
+        ];
     }
 
     /**
@@ -56,20 +56,20 @@ class IpUtilsTest extends TestCase
 
     public function getIpv6Data()
     {
-        return array(
-            array(true, '2a01:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'),
-            array(false, '2a00:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'),
-            array(false, '2a01:198:603:0:396e:4789:8e99:890f', '::1'),
-            array(true, '0:0:0:0:0:0:0:1', '::1'),
-            array(false, '0:0:603:0:396e:4789:8e99:0001', '::1'),
-            array(true, '0:0:603:0:396e:4789:8e99:0001', '::/0'),
-            array(true, '0:0:603:0:396e:4789:8e99:0001', '2a01:198:603:0::/0'),
-            array(true, '2a01:198:603:0:396e:4789:8e99:890f', array('::1', '2a01:198:603:0::/65')),
-            array(true, '2a01:198:603:0:396e:4789:8e99:890f', array('2a01:198:603:0::/65', '::1')),
-            array(false, '2a01:198:603:0:396e:4789:8e99:890f', array('::1', '1a01:198:603:0::/65')),
-            array(false, '}__test|O:21:&quot;JDatabaseDriverMysqli&quot;:3:{s:2', '::1'),
-            array(false, '2a01:198:603:0:396e:4789:8e99:890f', 'unknown'),
-        );
+        return [
+            [true, '2a01:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'],
+            [false, '2a00:198:603:0:396e:4789:8e99:890f', '2a01:198:603:0::/65'],
+            [false, '2a01:198:603:0:396e:4789:8e99:890f', '::1'],
+            [true, '0:0:0:0:0:0:0:1', '::1'],
+            [false, '0:0:603:0:396e:4789:8e99:0001', '::1'],
+            [true, '0:0:603:0:396e:4789:8e99:0001', '::/0'],
+            [true, '0:0:603:0:396e:4789:8e99:0001', '2a01:198:603:0::/0'],
+            [true, '2a01:198:603:0:396e:4789:8e99:890f', ['::1', '2a01:198:603:0::/65']],
+            [true, '2a01:198:603:0:396e:4789:8e99:890f', ['2a01:198:603:0::/65', '::1']],
+            [false, '2a01:198:603:0:396e:4789:8e99:890f', ['::1', '1a01:198:603:0::/65']],
+            [false, '}__test|O:21:&quot;JDatabaseDriverMysqli&quot;:3:{s:2', '::1'],
+            [false, '2a01:198:603:0:396e:4789:8e99:890f', 'unknown'],
+        ];
     }
 
     /**
@@ -95,10 +95,10 @@ class IpUtilsTest extends TestCase
 
     public function invalidIpAddressData()
     {
-        return array(
-            'invalid proxy wildcard' => array('192.168.20.13', '*'),
-            'invalid proxy missing netmask' => array('192.168.20.13', '0.0.0.0'),
-            'invalid request IP with invalid proxy wildcard' => array('0.0.0.0', '*'),
-        );
+        return [
+            'invalid proxy wildcard' => ['192.168.20.13', '*'],
+            'invalid proxy missing netmask' => ['192.168.20.13', '0.0.0.0'],
+            'invalid request IP with invalid proxy wildcard' => ['0.0.0.0', '*'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
index 201839f89c..03a7b7d9b8 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/JsonResponseTest.php
@@ -24,13 +24,13 @@ class JsonResponseTest extends TestCase
 
     public function testConstructorWithArrayCreatesJsonArray()
     {
-        $response = new JsonResponse(array(0, 1, 2, 3));
+        $response = new JsonResponse([0, 1, 2, 3]);
         $this->assertSame('[0,1,2,3]', $response->getContent());
     }
 
     public function testConstructorWithAssocArrayCreatesJsonObject()
     {
-        $response = new JsonResponse(array('foo' => 'bar'));
+        $response = new JsonResponse(['foo' => 'bar']);
         $this->assertSame('{"foo":"bar"}', $response->getContent());
     }
 
@@ -51,7 +51,7 @@ class JsonResponseTest extends TestCase
 
     public function testConstructorWithCustomStatus()
     {
-        $response = new JsonResponse(array(), 202);
+        $response = new JsonResponse([], 202);
         $this->assertSame(202, $response->getStatusCode());
     }
 
@@ -63,35 +63,35 @@ class JsonResponseTest extends TestCase
 
     public function testConstructorWithCustomHeaders()
     {
-        $response = new JsonResponse(array(), 200, array('ETag' => 'foo'));
+        $response = new JsonResponse([], 200, ['ETag' => 'foo']);
         $this->assertSame('application/json', $response->headers->get('Content-Type'));
         $this->assertSame('foo', $response->headers->get('ETag'));
     }
 
     public function testConstructorWithCustomContentType()
     {
-        $headers = array('Content-Type' => 'application/vnd.acme.blog-v1+json');
+        $headers = ['Content-Type' => 'application/vnd.acme.blog-v1+json'];
 
-        $response = new JsonResponse(array(), 200, $headers);
+        $response = new JsonResponse([], 200, $headers);
         $this->assertSame('application/vnd.acme.blog-v1+json', $response->headers->get('Content-Type'));
     }
 
     public function testSetJson()
     {
-        $response = new JsonResponse('1', 200, array(), true);
+        $response = new JsonResponse('1', 200, [], true);
         $this->assertEquals('1', $response->getContent());
 
-        $response = new JsonResponse('[1]', 200, array(), true);
+        $response = new JsonResponse('[1]', 200, [], true);
         $this->assertEquals('[1]', $response->getContent());
 
-        $response = new JsonResponse(null, 200, array());
+        $response = new JsonResponse(null, 200, []);
         $response->setJson('true');
         $this->assertEquals('true', $response->getContent());
     }
 
     public function testCreate()
     {
-        $response = JsonResponse::create(array('foo' => 'bar'), 204);
+        $response = JsonResponse::create(['foo' => 'bar'], 204);
 
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\JsonResponse', $response);
         $this->assertEquals('{"foo":"bar"}', $response->getContent());
@@ -107,14 +107,14 @@ class JsonResponseTest extends TestCase
 
     public function testStaticCreateJsonArray()
     {
-        $response = JsonResponse::create(array(0, 1, 2, 3));
+        $response = JsonResponse::create([0, 1, 2, 3]);
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\JsonResponse', $response);
         $this->assertSame('[0,1,2,3]', $response->getContent());
     }
 
     public function testStaticCreateJsonObject()
     {
-        $response = JsonResponse::create(array('foo' => 'bar'));
+        $response = JsonResponse::create(['foo' => 'bar']);
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\JsonResponse', $response);
         $this->assertSame('{"foo":"bar"}', $response->getContent());
     }
@@ -140,7 +140,7 @@ class JsonResponseTest extends TestCase
 
     public function testStaticCreateWithCustomStatus()
     {
-        $response = JsonResponse::create(array(), 202);
+        $response = JsonResponse::create([], 202);
         $this->assertSame(202, $response->getStatusCode());
     }
 
@@ -152,22 +152,22 @@ class JsonResponseTest extends TestCase
 
     public function testStaticCreateWithCustomHeaders()
     {
-        $response = JsonResponse::create(array(), 200, array('ETag' => 'foo'));
+        $response = JsonResponse::create([], 200, ['ETag' => 'foo']);
         $this->assertSame('application/json', $response->headers->get('Content-Type'));
         $this->assertSame('foo', $response->headers->get('ETag'));
     }
 
     public function testStaticCreateWithCustomContentType()
     {
-        $headers = array('Content-Type' => 'application/vnd.acme.blog-v1+json');
+        $headers = ['Content-Type' => 'application/vnd.acme.blog-v1+json'];
 
-        $response = JsonResponse::create(array(), 200, $headers);
+        $response = JsonResponse::create([], 200, $headers);
         $this->assertSame('application/vnd.acme.blog-v1+json', $response->headers->get('Content-Type'));
     }
 
     public function testSetCallback()
     {
-        $response = JsonResponse::create(array('foo' => 'bar'))->setCallback('callback');
+        $response = JsonResponse::create(['foo' => 'bar'])->setCallback('callback');
 
         $this->assertEquals('/**/callback({"foo":"bar"});', $response->getContent());
         $this->assertEquals('text/javascript', $response->headers->get('Content-Type'));
@@ -190,7 +190,7 @@ class JsonResponseTest extends TestCase
     public function testSetEncodingOptions()
     {
         $response = new JsonResponse();
-        $response->setData(array(array(1, 2, 3)));
+        $response->setData([[1, 2, 3]]);
 
         $this->assertEquals('[[1,2,3]]', $response->getContent());
 
@@ -239,7 +239,7 @@ class JsonResponseTest extends TestCase
 
     public function testSetComplexCallback()
     {
-        $response = JsonResponse::create(array('foo' => 'bar'));
+        $response = JsonResponse::create(['foo' => 'bar']);
         $response->setCallback('ಠ_ಠ["foo"].bar[0]');
 
         $this->assertEquals('/**/ಠ_ಠ["foo"].bar[0]({"foo":"bar"});', $response->getContent());
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
index dccfd4f308..d2a5c991cc 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ParameterBagTest.php
@@ -23,44 +23,44 @@ class ParameterBagTest extends TestCase
 
     public function testAll()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $bag->all(), '->all() gets all the input');
+        $bag = new ParameterBag(['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $bag->all(), '->all() gets all the input');
     }
 
     public function testKeys()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
-        $this->assertEquals(array('foo'), $bag->keys());
+        $bag = new ParameterBag(['foo' => 'bar']);
+        $this->assertEquals(['foo'], $bag->keys());
     }
 
     public function testAdd()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
-        $bag->add(array('bar' => 'bas'));
-        $this->assertEquals(array('foo' => 'bar', 'bar' => 'bas'), $bag->all());
+        $bag = new ParameterBag(['foo' => 'bar']);
+        $bag->add(['bar' => 'bas']);
+        $this->assertEquals(['foo' => 'bar', 'bar' => 'bas'], $bag->all());
     }
 
     public function testRemove()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
-        $bag->add(array('bar' => 'bas'));
-        $this->assertEquals(array('foo' => 'bar', 'bar' => 'bas'), $bag->all());
+        $bag = new ParameterBag(['foo' => 'bar']);
+        $bag->add(['bar' => 'bas']);
+        $this->assertEquals(['foo' => 'bar', 'bar' => 'bas'], $bag->all());
         $bag->remove('bar');
-        $this->assertEquals(array('foo' => 'bar'), $bag->all());
+        $this->assertEquals(['foo' => 'bar'], $bag->all());
     }
 
     public function testReplace()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
 
-        $bag->replace(array('FOO' => 'BAR'));
-        $this->assertEquals(array('FOO' => 'BAR'), $bag->all(), '->replace() replaces the input with the argument');
+        $bag->replace(['FOO' => 'BAR']);
+        $this->assertEquals(['FOO' => 'BAR'], $bag->all(), '->replace() replaces the input with the argument');
         $this->assertFalse($bag->has('foo'), '->replace() overrides previously set the input');
     }
 
     public function testGet()
     {
-        $bag = new ParameterBag(array('foo' => 'bar', 'null' => null));
+        $bag = new ParameterBag(['foo' => 'bar', 'null' => null]);
 
         $this->assertEquals('bar', $bag->get('foo'), '->get() gets the value of a parameter');
         $this->assertEquals('default', $bag->get('unknown', 'default'), '->get() returns second argument as default if a parameter is not defined');
@@ -69,14 +69,14 @@ class ParameterBagTest extends TestCase
 
     public function testGetDoesNotUseDeepByDefault()
     {
-        $bag = new ParameterBag(array('foo' => array('bar' => 'moo')));
+        $bag = new ParameterBag(['foo' => ['bar' => 'moo']]);
 
         $this->assertNull($bag->get('foo[bar]'));
     }
 
     public function testSet()
     {
-        $bag = new ParameterBag(array());
+        $bag = new ParameterBag([]);
 
         $bag->set('foo', 'bar');
         $this->assertEquals('bar', $bag->get('foo'), '->set() sets the value of parameter');
@@ -87,7 +87,7 @@ class ParameterBagTest extends TestCase
 
     public function testHas()
     {
-        $bag = new ParameterBag(array('foo' => 'bar'));
+        $bag = new ParameterBag(['foo' => 'bar']);
 
         $this->assertTrue($bag->has('foo'), '->has() returns true if a parameter is defined');
         $this->assertFalse($bag->has('unknown'), '->has() return false if a parameter is not defined');
@@ -95,7 +95,7 @@ class ParameterBagTest extends TestCase
 
     public function testGetAlpha()
     {
-        $bag = new ParameterBag(array('word' => 'foo_BAR_012'));
+        $bag = new ParameterBag(['word' => 'foo_BAR_012']);
 
         $this->assertEquals('fooBAR', $bag->getAlpha('word'), '->getAlpha() gets only alphabetic characters');
         $this->assertEquals('', $bag->getAlpha('unknown'), '->getAlpha() returns empty string if a parameter is not defined');
@@ -103,7 +103,7 @@ class ParameterBagTest extends TestCase
 
     public function testGetAlnum()
     {
-        $bag = new ParameterBag(array('word' => 'foo_BAR_012'));
+        $bag = new ParameterBag(['word' => 'foo_BAR_012']);
 
         $this->assertEquals('fooBAR012', $bag->getAlnum('word'), '->getAlnum() gets only alphanumeric characters');
         $this->assertEquals('', $bag->getAlnum('unknown'), '->getAlnum() returns empty string if a parameter is not defined');
@@ -111,7 +111,7 @@ class ParameterBagTest extends TestCase
 
     public function testGetDigits()
     {
-        $bag = new ParameterBag(array('word' => 'foo_BAR_012'));
+        $bag = new ParameterBag(['word' => 'foo_BAR_012']);
 
         $this->assertEquals('012', $bag->getDigits('word'), '->getDigits() gets only digits as string');
         $this->assertEquals('', $bag->getDigits('unknown'), '->getDigits() returns empty string if a parameter is not defined');
@@ -119,7 +119,7 @@ class ParameterBagTest extends TestCase
 
     public function testGetInt()
     {
-        $bag = new ParameterBag(array('digits' => '0123'));
+        $bag = new ParameterBag(['digits' => '0123']);
 
         $this->assertEquals(123, $bag->getInt('digits'), '->getInt() gets a value of parameter as integer');
         $this->assertEquals(0, $bag->getInt('unknown'), '->getInt() returns zero if a parameter is not defined');
@@ -127,14 +127,14 @@ class ParameterBagTest extends TestCase
 
     public function testFilter()
     {
-        $bag = new ParameterBag(array(
+        $bag = new ParameterBag([
             'digits' => '0123ab',
             'email' => 'example@example.com',
             'url' => 'http://example.com/foo',
             'dec' => '256',
             'hex' => '0x100',
-            'array' => array('bang'),
-            ));
+            'array' => ['bang'],
+            ]);
 
         $this->assertEmpty($bag->filter('nokey'), '->filter() should return empty by default if no key is found');
 
@@ -142,27 +142,27 @@ class ParameterBagTest extends TestCase
 
         $this->assertEquals('example@example.com', $bag->filter('email', '', FILTER_VALIDATE_EMAIL), '->filter() gets a value of parameter as email');
 
-        $this->assertEquals('http://example.com/foo', $bag->filter('url', '', FILTER_VALIDATE_URL, array('flags' => FILTER_FLAG_PATH_REQUIRED)), '->filter() gets a value of parameter as URL with a path');
+        $this->assertEquals('http://example.com/foo', $bag->filter('url', '', FILTER_VALIDATE_URL, ['flags' => FILTER_FLAG_PATH_REQUIRED]), '->filter() gets a value of parameter as URL with a path');
 
         // This test is repeated for code-coverage
         $this->assertEquals('http://example.com/foo', $bag->filter('url', '', FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED), '->filter() gets a value of parameter as URL with a path');
 
-        $this->assertFalse($bag->filter('dec', '', FILTER_VALIDATE_INT, array(
+        $this->assertFalse($bag->filter('dec', '', FILTER_VALIDATE_INT, [
             'flags' => FILTER_FLAG_ALLOW_HEX,
-            'options' => array('min_range' => 1, 'max_range' => 0xff),
-        )), '->filter() gets a value of parameter as integer between boundaries');
+            'options' => ['min_range' => 1, 'max_range' => 0xff],
+        ]), '->filter() gets a value of parameter as integer between boundaries');
 
-        $this->assertFalse($bag->filter('hex', '', FILTER_VALIDATE_INT, array(
+        $this->assertFalse($bag->filter('hex', '', FILTER_VALIDATE_INT, [
             'flags' => FILTER_FLAG_ALLOW_HEX,
-            'options' => array('min_range' => 1, 'max_range' => 0xff),
-        )), '->filter() gets a value of parameter as integer between boundaries');
+            'options' => ['min_range' => 1, 'max_range' => 0xff],
+        ]), '->filter() gets a value of parameter as integer between boundaries');
 
-        $this->assertEquals(array('bang'), $bag->filter('array', ''), '->filter() gets a value of parameter as an array');
+        $this->assertEquals(['bang'], $bag->filter('array', ''), '->filter() gets a value of parameter as an array');
     }
 
     public function testGetIterator()
     {
-        $parameters = array('foo' => 'bar', 'hello' => 'world');
+        $parameters = ['foo' => 'bar', 'hello' => 'world'];
         $bag = new ParameterBag($parameters);
 
         $i = 0;
@@ -176,7 +176,7 @@ class ParameterBagTest extends TestCase
 
     public function testCount()
     {
-        $parameters = array('foo' => 'bar', 'hello' => 'world');
+        $parameters = ['foo' => 'bar', 'hello' => 'world'];
         $bag = new ParameterBag($parameters);
 
         $this->assertCount(\count($parameters), $bag);
@@ -184,7 +184,7 @@ class ParameterBagTest extends TestCase
 
     public function testGetBoolean()
     {
-        $parameters = array('string_true' => 'true', 'string_false' => 'false');
+        $parameters = ['string_true' => 'true', 'string_false' => 'false'];
         $bag = new ParameterBag($parameters);
 
         $this->assertTrue($bag->getBoolean('string_true'), '->getBoolean() gets the string true as boolean true');
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
index d389e83dbe..64c3e73ee2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RedirectResponseTest.php
@@ -22,7 +22,7 @@ class RedirectResponseTest extends TestCase
 
         $this->assertEquals(1, preg_match(
             '#<meta http-equiv="refresh" content="\d+;url=foo\.bar" />#',
-            preg_replace(array('/\s+/', '/\'/'), array(' ', '"'), $response->getContent())
+            preg_replace(['/\s+/', '/\'/'], [' ', '"'], $response->getContent())
         ));
     }
 
@@ -87,7 +87,7 @@ class RedirectResponseTest extends TestCase
         $response = new RedirectResponse('foo.bar', 301);
         $this->assertFalse($response->headers->hasCacheControlDirective('no-cache'));
 
-        $response = new RedirectResponse('foo.bar', 301, array('cache-control' => 'max-age=86400'));
+        $response = new RedirectResponse('foo.bar', 301, ['cache-control' => 'max-age=86400']);
         $this->assertFalse($response->headers->hasCacheControlDirective('no-cache'));
         $this->assertTrue($response->headers->hasCacheControlDirective('max-age'));
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
index cc35ad637b..57e9c3d30f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestMatcherTest.php
@@ -34,20 +34,20 @@ class RequestMatcherTest extends TestCase
 
     public function getMethodData()
     {
-        return array(
-            array('get', 'get', true),
-            array('get', array('get', 'post'), true),
-            array('get', 'post', false),
-            array('get', 'GET', true),
-            array('get', array('GET', 'POST'), true),
-            array('get', 'POST', false),
-        );
+        return [
+            ['get', 'get', true],
+            ['get', ['get', 'post'], true],
+            ['get', 'post', false],
+            ['get', 'GET', true],
+            ['get', ['GET', 'POST'], true],
+            ['get', 'POST', false],
+        ];
     }
 
     public function testScheme()
     {
         $httpRequest = $request = $request = Request::create('');
-        $httpsRequest = $request = $request = Request::create('', 'get', array(), array(), array(), array('HTTPS' => 'on'));
+        $httpsRequest = $request = $request = Request::create('', 'get', [], [], [], ['HTTPS' => 'on']);
 
         $matcher = new RequestMatcher();
         $matcher->matchScheme('https');
@@ -69,7 +69,7 @@ class RequestMatcherTest extends TestCase
     public function testHost($pattern, $isMatch)
     {
         $matcher = new RequestMatcher();
-        $request = Request::create('', 'get', array(), array(), array(), array('HTTP_HOST' => 'foo.example.com'));
+        $request = Request::create('', 'get', [], [], [], ['HTTP_HOST' => 'foo.example.com']);
 
         $matcher->matchHost($pattern);
         $this->assertSame($isMatch, $matcher->matches($request));
@@ -81,7 +81,7 @@ class RequestMatcherTest extends TestCase
     public function testPort()
     {
         $matcher = new RequestMatcher();
-        $request = Request::create('', 'get', array(), array(), array(), array('HTTP_HOST' => null, 'SERVER_PORT' => 8000));
+        $request = Request::create('', 'get', [], [], [], ['HTTP_HOST' => null, 'SERVER_PORT' => 8000]);
 
         $matcher->matchPort(8000);
         $this->assertTrue($matcher->matches($request));
@@ -89,22 +89,22 @@ class RequestMatcherTest extends TestCase
         $matcher->matchPort(9000);
         $this->assertFalse($matcher->matches($request));
 
-        $matcher = new RequestMatcher(null, null, null, null, array(), null, 8000);
+        $matcher = new RequestMatcher(null, null, null, null, [], null, 8000);
         $this->assertTrue($matcher->matches($request));
     }
 
     public function getHostData()
     {
-        return array(
-            array('.*\.example\.com', true),
-            array('\.example\.com$', true),
-            array('^.*\.example\.com$', true),
-            array('.*\.sensio\.com', false),
-            array('.*\.example\.COM', true),
-            array('\.example\.COM$', true),
-            array('^.*\.example\.COM$', true),
-            array('.*\.sensio\.COM', false),
-        );
+        return [
+            ['.*\.example\.com', true],
+            ['\.example\.com$', true],
+            ['^.*\.example\.com$', true],
+            ['.*\.sensio\.com', false],
+            ['.*\.example\.COM', true],
+            ['\.example\.COM$', true],
+            ['^.*\.example\.COM$', true],
+            ['.*\.sensio\.COM', false],
+        ];
     }
 
     public function testPath()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
index 36a9491348..222173ec00 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/RequestTest.php
@@ -21,24 +21,24 @@ class RequestTest extends TestCase
 {
     protected function tearDown()
     {
-        Request::setTrustedProxies(array(), -1);
-        Request::setTrustedHosts(array());
+        Request::setTrustedProxies([], -1);
+        Request::setTrustedHosts([]);
     }
 
     public function testInitialize()
     {
         $request = new Request();
 
-        $request->initialize(array('foo' => 'bar'));
+        $request->initialize(['foo' => 'bar']);
         $this->assertEquals('bar', $request->query->get('foo'), '->initialize() takes an array of query parameters as its first argument');
 
-        $request->initialize(array(), array('foo' => 'bar'));
+        $request->initialize([], ['foo' => 'bar']);
         $this->assertEquals('bar', $request->request->get('foo'), '->initialize() takes an array of request parameters as its second argument');
 
-        $request->initialize(array(), array(), array('foo' => 'bar'));
+        $request->initialize([], [], ['foo' => 'bar']);
         $this->assertEquals('bar', $request->attributes->get('foo'), '->initialize() takes an array of attributes as its third argument');
 
-        $request->initialize(array(), array(), array(), array(), array(), array('HTTP_FOO' => 'bar'));
+        $request->initialize([], [], [], [], [], ['HTTP_FOO' => 'bar']);
         $this->assertEquals('bar', $request->headers->get('FOO'), '->initialize() takes an array of HTTP headers as its sixth argument');
     }
 
@@ -101,7 +101,7 @@ class RequestTest extends TestCase
         $this->assertEquals('test.com', $request->getHttpHost());
         $this->assertFalse($request->isSecure());
 
-        $request = Request::create('http://test.com/foo', 'GET', array('bar' => 'baz'));
+        $request = Request::create('http://test.com/foo', 'GET', ['bar' => 'baz']);
         $this->assertEquals('http://test.com/foo?bar=baz', $request->getUri());
         $this->assertEquals('/foo', $request->getPathInfo());
         $this->assertEquals('bar=baz', $request->getQueryString());
@@ -109,7 +109,7 @@ class RequestTest extends TestCase
         $this->assertEquals('test.com', $request->getHttpHost());
         $this->assertFalse($request->isSecure());
 
-        $request = Request::create('http://test.com/foo?bar=foo', 'GET', array('bar' => 'baz'));
+        $request = Request::create('http://test.com/foo?bar=foo', 'GET', ['bar' => 'baz']);
         $this->assertEquals('http://test.com/foo?bar=baz', $request->getUri());
         $this->assertEquals('/foo', $request->getPathInfo());
         $this->assertEquals('bar=baz', $request->getQueryString());
@@ -166,7 +166,7 @@ class RequestTest extends TestCase
         $this->assertTrue($request->isSecure());
 
         $json = '{"jsonrpc":"2.0","method":"echo","id":7,"params":["Hello World"]}';
-        $request = Request::create('http://example.com/jsonrpc', 'POST', array(), array(), array(), array(), $json);
+        $request = Request::create('http://example.com/jsonrpc', 'POST', [], [], [], [], $json);
         $this->assertEquals($json, $request->getContent());
         $this->assertFalse($request->isSecure());
 
@@ -216,16 +216,16 @@ class RequestTest extends TestCase
 
         $request = Request::create('http://test.com/?foo');
         $this->assertEquals('/?foo', $request->getRequestUri());
-        $this->assertEquals(array('foo' => ''), $request->query->all());
+        $this->assertEquals(['foo' => ''], $request->query->all());
 
         // assume rewrite rule: (.*) --> app/app.php; app/ is a symlink to a symfony web/ directory
-        $request = Request::create('http://test.com/apparthotel-1234', 'GET', array(), array(), array(),
-            array(
+        $request = Request::create('http://test.com/apparthotel-1234', 'GET', [], [], [],
+            [
                 'DOCUMENT_ROOT' => '/var/www/www.test.com',
                 'SCRIPT_FILENAME' => '/var/www/www.test.com/app/app.php',
                 'SCRIPT_NAME' => '/app/app.php',
                 'PHP_SELF' => '/app/app.php/apparthotel-1234',
-            ));
+            ]);
         $this->assertEquals('http://test.com/apparthotel-1234', $request->getUri());
         $this->assertEquals('/apparthotel-1234', $request->getPathInfo());
         $this->assertEquals('', $request->getQueryString());
@@ -258,7 +258,7 @@ class RequestTest extends TestCase
         $this->assertEquals(8080, $request->getPort());
         $this->assertFalse($request->isSecure());
 
-        $request = Request::create('http://test.com/foo?bar=foo', 'GET', array('bar' => 'baz'));
+        $request = Request::create('http://test.com/foo?bar=foo', 'GET', ['bar' => 'baz']);
         $request->server->set('REQUEST_URI', 'http://test.com/foo?bar=foo');
         $this->assertEquals('http://test.com/foo?bar=baz', $request->getUri());
         $this->assertEquals('/foo', $request->getPathInfo());
@@ -289,13 +289,13 @@ class RequestTest extends TestCase
     public function testGetRequestUri($serverRequestUri, $expected, $message)
     {
         $request = new Request();
-        $request->server->add(array(
+        $request->server->add([
             'REQUEST_URI' => $serverRequestUri,
 
             // For having http://test.com
             'SERVER_NAME' => 'test.com',
             'SERVER_PORT' => 80,
-        ));
+        ]);
 
         $this->assertSame($expected, $request->getRequestUri(), $message);
         $this->assertSame($expected, $request->server->get('REQUEST_URI'), 'Normalize the request URI.');
@@ -304,21 +304,21 @@ class RequestTest extends TestCase
     public function getRequestUriData()
     {
         $message = 'Do not modify the path.';
-        yield array('/foo', '/foo', $message);
-        yield array('//bar/foo', '//bar/foo', $message);
-        yield array('///bar/foo', '///bar/foo', $message);
+        yield ['/foo', '/foo', $message];
+        yield ['//bar/foo', '//bar/foo', $message];
+        yield ['///bar/foo', '///bar/foo', $message];
 
         $message = 'Handle when the scheme, host are on REQUEST_URI.';
-        yield array('http://test.com/foo?bar=baz', '/foo?bar=baz', $message);
+        yield ['http://test.com/foo?bar=baz', '/foo?bar=baz', $message];
 
         $message = 'Handle when the scheme, host and port are on REQUEST_URI.';
-        yield array('http://test.com:80/foo', '/foo', $message);
-        yield array('https://test.com:8080/foo', '/foo', $message);
-        yield array('https://test.com:443/foo', '/foo', $message);
+        yield ['http://test.com:80/foo', '/foo', $message];
+        yield ['https://test.com:8080/foo', '/foo', $message];
+        yield ['https://test.com:443/foo', '/foo', $message];
 
         $message = 'Fragment should not be included in the URI';
-        yield array('http://test.com/foo#bar', '/foo', $message);
-        yield array('/foo#bar', '/foo', $message);
+        yield ['http://test.com/foo#bar', '/foo', $message];
+        yield ['/foo#bar', '/foo', $message];
     }
 
     public function testGetRequestUriWithoutRequiredHeader()
@@ -335,7 +335,7 @@ class RequestTest extends TestCase
     public function testCreateCheckPrecedence()
     {
         // server is used by default
-        $request = Request::create('/', 'DELETE', array(), array(), array(), array(
+        $request = Request::create('/', 'DELETE', [], [], [], [
             'HTTP_HOST' => 'example.com',
             'HTTPS' => 'on',
             'SERVER_PORT' => 443,
@@ -343,7 +343,7 @@ class RequestTest extends TestCase
             'PHP_AUTH_PW' => 'pa$$',
             'QUERY_STRING' => 'foo=bar',
             'CONTENT_TYPE' => 'application/json',
-        ));
+        ]);
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(443, $request->getPort());
         $this->assertTrue($request->isSecure());
@@ -353,11 +353,11 @@ class RequestTest extends TestCase
         $this->assertEquals('application/json', $request->headers->get('CONTENT_TYPE'));
 
         // URI has precedence over server
-        $request = Request::create('http://thomas:pokemon@example.net:8080/?foo=bar', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://thomas:pokemon@example.net:8080/?foo=bar', 'GET', [], [], [], [
             'HTTP_HOST' => 'example.com',
             'HTTPS' => 'on',
             'SERVER_PORT' => 443,
-        ));
+        ]);
         $this->assertEquals('example.net', $request->getHost());
         $this->assertEquals(8080, $request->getPort());
         $this->assertFalse($request->isSecure());
@@ -368,7 +368,7 @@ class RequestTest extends TestCase
 
     public function testDuplicate()
     {
-        $request = new Request(array('foo' => 'bar'), array('foo' => 'bar'), array('foo' => 'bar'), array(), array(), array('HTTP_FOO' => 'bar'));
+        $request = new Request(['foo' => 'bar'], ['foo' => 'bar'], ['foo' => 'bar'], [], [], ['HTTP_FOO' => 'bar']);
         $dup = $request->duplicate();
 
         $this->assertEquals($request->query->all(), $dup->query->all(), '->duplicate() duplicates a request an copy the current query parameters');
@@ -376,17 +376,17 @@ class RequestTest extends TestCase
         $this->assertEquals($request->attributes->all(), $dup->attributes->all(), '->duplicate() duplicates a request an copy the current attributes');
         $this->assertEquals($request->headers->all(), $dup->headers->all(), '->duplicate() duplicates a request an copy the current HTTP headers');
 
-        $dup = $request->duplicate(array('foo' => 'foobar'), array('foo' => 'foobar'), array('foo' => 'foobar'), array(), array(), array('HTTP_FOO' => 'foobar'));
+        $dup = $request->duplicate(['foo' => 'foobar'], ['foo' => 'foobar'], ['foo' => 'foobar'], [], [], ['HTTP_FOO' => 'foobar']);
 
-        $this->assertEquals(array('foo' => 'foobar'), $dup->query->all(), '->duplicate() overrides the query parameters if provided');
-        $this->assertEquals(array('foo' => 'foobar'), $dup->request->all(), '->duplicate() overrides the request parameters if provided');
-        $this->assertEquals(array('foo' => 'foobar'), $dup->attributes->all(), '->duplicate() overrides the attributes if provided');
-        $this->assertEquals(array('foo' => array('foobar')), $dup->headers->all(), '->duplicate() overrides the HTTP header if provided');
+        $this->assertEquals(['foo' => 'foobar'], $dup->query->all(), '->duplicate() overrides the query parameters if provided');
+        $this->assertEquals(['foo' => 'foobar'], $dup->request->all(), '->duplicate() overrides the request parameters if provided');
+        $this->assertEquals(['foo' => 'foobar'], $dup->attributes->all(), '->duplicate() overrides the attributes if provided');
+        $this->assertEquals(['foo' => ['foobar']], $dup->headers->all(), '->duplicate() overrides the HTTP header if provided');
     }
 
     public function testDuplicateWithFormat()
     {
-        $request = new Request(array(), array(), array('_format' => 'json'));
+        $request = new Request([], [], ['_format' => 'json']);
         $dup = $request->duplicate();
 
         $this->assertEquals('json', $dup->getRequestFormat());
@@ -421,7 +421,7 @@ class RequestTest extends TestCase
     public function getFormatToMimeTypeMapProviderWithAdditionalNullFormat()
     {
         return array_merge(
-            array(array(null, array(null, 'unexistent-mime-type'))),
+            [[null, [null, 'unexistent-mime-type']]],
             $this->getFormatToMimeTypeMapProvider()
         );
     }
@@ -456,7 +456,7 @@ class RequestTest extends TestCase
     {
         $request = new Request();
         $this->assertNull($request->getMimeType('foo'));
-        $this->assertEquals(array(), Request::getMimeTypes('foo'));
+        $this->assertEquals([], Request::getMimeTypes('foo'));
     }
 
     public function testGetFormatWithCustomMimeType()
@@ -468,21 +468,21 @@ class RequestTest extends TestCase
 
     public function getFormatToMimeTypeMapProvider()
     {
-        return array(
-            array('txt', array('text/plain')),
-            array('js', array('application/javascript', 'application/x-javascript', 'text/javascript')),
-            array('css', array('text/css')),
-            array('json', array('application/json', 'application/x-json')),
-            array('jsonld', array('application/ld+json')),
-            array('xml', array('text/xml', 'application/xml', 'application/x-xml')),
-            array('rdf', array('application/rdf+xml')),
-            array('atom', array('application/atom+xml')),
-        );
+        return [
+            ['txt', ['text/plain']],
+            ['js', ['application/javascript', 'application/x-javascript', 'text/javascript']],
+            ['css', ['text/css']],
+            ['json', ['application/json', 'application/x-json']],
+            ['jsonld', ['application/ld+json']],
+            ['xml', ['text/xml', 'application/xml', 'application/x-xml']],
+            ['rdf', ['application/rdf+xml']],
+            ['atom', ['application/atom+xml']],
+        ];
     }
 
     public function testGetUri()
     {
-        $server = array();
+        $server = [];
 
         // Standard Request on non default PORT
         // http://host:8080/index.php/path/info?query=string
@@ -501,7 +501,7 @@ class RequestTest extends TestCase
 
         $request = new Request();
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host:8080/index.php/path/info?query=string', $request->getUri(), '->getUri() with non default port');
 
@@ -510,7 +510,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host/index.php/path/info?query=string', $request->getUri(), '->getUri() with default port');
 
@@ -519,7 +519,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://servername/index.php/path/info?query=string', $request->getUri(), '->getUri() with default port without HOST_HEADER');
 
@@ -527,7 +527,7 @@ class RequestTest extends TestCase
         //   RewriteCond %{REQUEST_FILENAME} !-f
         //   RewriteRule ^(.*)$ index.php [QSA,L]
         // http://host:8080/path/info?query=string
-        $server = array();
+        $server = [];
         $server['HTTP_HOST'] = 'host:8080';
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '8080';
@@ -541,7 +541,7 @@ class RequestTest extends TestCase
         $server['PHP_SELF'] = '/index.php';
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://host:8080/path/info?query=string', $request->getUri(), '->getUri() with rewrite');
 
         // Use std port number
@@ -550,7 +550,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host/path/info?query=string', $request->getUri(), '->getUri() with rewrite and default port');
 
@@ -559,13 +559,13 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://servername/path/info?query=string', $request->getUri(), '->getUri() with rewrite, default port without HOST_HEADER');
 
         // With encoded characters
 
-        $server = array(
+        $server = [
             'HTTP_HOST' => 'host:8080',
             'SERVER_NAME' => 'servername',
             'SERVER_PORT' => '8080',
@@ -575,9 +575,9 @@ class RequestTest extends TestCase
             'PATH_TRANSLATED' => 'redirect:/index.php/foo bar/in+fo',
             'PHP_SELF' => '/ba se/index_dev.php/path/info',
             'SCRIPT_FILENAME' => '/some/where/ba se/index_dev.php',
-        );
+        ];
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals(
             'http://host:8080/ba%20se/index_dev.php/foo%20bar/in+fo?query=string',
@@ -587,11 +587,11 @@ class RequestTest extends TestCase
         // with user info
 
         $server['PHP_AUTH_USER'] = 'fabien';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://host:8080/ba%20se/index_dev.php/foo%20bar/in+fo?query=string', $request->getUri());
 
         $server['PHP_AUTH_PW'] = 'symfony';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://host:8080/ba%20se/index_dev.php/foo%20bar/in+fo?query=string', $request->getUri());
     }
 
@@ -609,7 +609,7 @@ class RequestTest extends TestCase
         $request = Request::create('https://test.com:90/foo?bar=baz');
         $this->assertEquals('https://test.com:90/some/path', $request->getUriForPath('/some/path'));
 
-        $server = array();
+        $server = [];
 
         // Standard Request on non default PORT
         // http://host:8080/index.php/path/info?query=string
@@ -628,7 +628,7 @@ class RequestTest extends TestCase
 
         $request = new Request();
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host:8080/index.php/some/path', $request->getUriForPath('/some/path'), '->getUriForPath() with non default port');
 
@@ -637,7 +637,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host/index.php/some/path', $request->getUriForPath('/some/path'), '->getUriForPath() with default port');
 
@@ -646,7 +646,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://servername/index.php/some/path', $request->getUriForPath('/some/path'), '->getUriForPath() with default port without HOST_HEADER');
 
@@ -654,7 +654,7 @@ class RequestTest extends TestCase
         //   RewriteCond %{REQUEST_FILENAME} !-f
         //   RewriteRule ^(.*)$ index.php [QSA,L]
         // http://host:8080/path/info?query=string
-        $server = array();
+        $server = [];
         $server['HTTP_HOST'] = 'host:8080';
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '8080';
@@ -668,7 +668,7 @@ class RequestTest extends TestCase
         $server['PHP_SELF'] = '/index.php';
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://host:8080/some/path', $request->getUriForPath('/some/path'), '->getUri() with rewrite');
 
         // Use std port number
@@ -677,7 +677,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://host/some/path', $request->getUriForPath('/some/path'), '->getUriForPath() with rewrite and default port');
 
@@ -686,7 +686,7 @@ class RequestTest extends TestCase
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '80';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('http://servername/some/path', $request->getUriForPath('/some/path'), '->getUriForPath() with rewrite, default port without HOST_HEADER');
         $this->assertEquals('servername', $request->getHttpHost());
@@ -694,11 +694,11 @@ class RequestTest extends TestCase
         // with user info
 
         $server['PHP_AUTH_USER'] = 'fabien';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername/some/path', $request->getUriForPath('/some/path'));
 
         $server['PHP_AUTH_PW'] = 'symfony';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername/some/path', $request->getUriForPath('/some/path'));
     }
 
@@ -712,30 +712,30 @@ class RequestTest extends TestCase
 
     public function getRelativeUriForPathData()
     {
-        return array(
-            array('me.png', '/foo', '/me.png'),
-            array('../me.png', '/foo/bar', '/me.png'),
-            array('me.png', '/foo/bar', '/foo/me.png'),
-            array('../baz/me.png', '/foo/bar/b', '/foo/baz/me.png'),
-            array('../../fooz/baz/me.png', '/foo/bar/b', '/fooz/baz/me.png'),
-            array('baz/me.png', '/foo/bar/b', 'baz/me.png'),
-        );
+        return [
+            ['me.png', '/foo', '/me.png'],
+            ['../me.png', '/foo/bar', '/me.png'],
+            ['me.png', '/foo/bar', '/foo/me.png'],
+            ['../baz/me.png', '/foo/bar/b', '/foo/baz/me.png'],
+            ['../../fooz/baz/me.png', '/foo/bar/b', '/fooz/baz/me.png'],
+            ['baz/me.png', '/foo/bar/b', 'baz/me.png'],
+        ];
     }
 
     public function testGetUserInfo()
     {
         $request = new Request();
 
-        $server = array('PHP_AUTH_USER' => 'fabien');
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $server = ['PHP_AUTH_USER' => 'fabien'];
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('fabien', $request->getUserInfo());
 
         $server['PHP_AUTH_USER'] = '0';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('0', $request->getUserInfo());
 
         $server['PHP_AUTH_PW'] = '0';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('0:0', $request->getUserInfo());
     }
 
@@ -743,22 +743,22 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array();
+        $server = [];
         $server['SERVER_NAME'] = 'servername';
         $server['SERVER_PORT'] = '90';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername:90', $request->getSchemeAndHttpHost());
 
         $server['PHP_AUTH_USER'] = 'fabien';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername:90', $request->getSchemeAndHttpHost());
 
         $server['PHP_AUTH_USER'] = '0';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername:90', $request->getSchemeAndHttpHost());
 
         $server['PHP_AUTH_PW'] = '0';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('http://servername:90', $request->getSchemeAndHttpHost());
     }
 
@@ -775,35 +775,35 @@ class RequestTest extends TestCase
 
     public function getQueryStringNormalizationData()
     {
-        return array(
-            array('foo', 'foo=', 'works with valueless parameters'),
-            array('foo=', 'foo=', 'includes a dangling equal sign'),
-            array('bar=&foo=bar', 'bar=&foo=bar', '->works with empty parameters'),
-            array('foo=bar&bar=', 'bar=&foo=bar', 'sorts keys alphabetically'),
+        return [
+            ['foo', 'foo=', 'works with valueless parameters'],
+            ['foo=', 'foo=', 'includes a dangling equal sign'],
+            ['bar=&foo=bar', 'bar=&foo=bar', '->works with empty parameters'],
+            ['foo=bar&bar=', 'bar=&foo=bar', 'sorts keys alphabetically'],
 
             // GET parameters, that are submitted from a HTML form, encode spaces as "+" by default (as defined in enctype application/x-www-form-urlencoded).
             // PHP also converts "+" to spaces when filling the global _GET or when using the function parse_str.
-            array('him=John%20Doe&her=Jane+Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes spaces in both encodings "%20" and "+"'),
+            ['him=John%20Doe&her=Jane+Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes spaces in both encodings "%20" and "+"'],
 
-            array('foo[]=1&foo[]=2', 'foo%5B0%5D=1&foo%5B1%5D=2', 'allows array notation'),
-            array('foo=1&foo=2', 'foo=2', 'merges repeated parameters'),
-            array('pa%3Dram=foo%26bar%3Dbaz&test=test', 'pa%3Dram=foo%26bar%3Dbaz&test=test', 'works with encoded delimiters'),
-            array('0', '0=', 'allows "0"'),
-            array('Jane Doe&John%20Doe', 'Jane_Doe=&John_Doe=', 'normalizes encoding in keys'),
-            array('her=Jane Doe&him=John%20Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes encoding in values'),
-            array('foo=bar&&&test&&', 'foo=bar&test=', 'removes unneeded delimiters'),
-            array('formula=e=m*c^2', 'formula=e%3Dm%2Ac%5E2', 'correctly treats only the first "=" as delimiter and the next as value'),
+            ['foo[]=1&foo[]=2', 'foo%5B0%5D=1&foo%5B1%5D=2', 'allows array notation'],
+            ['foo=1&foo=2', 'foo=2', 'merges repeated parameters'],
+            ['pa%3Dram=foo%26bar%3Dbaz&test=test', 'pa%3Dram=foo%26bar%3Dbaz&test=test', 'works with encoded delimiters'],
+            ['0', '0=', 'allows "0"'],
+            ['Jane Doe&John%20Doe', 'Jane_Doe=&John_Doe=', 'normalizes encoding in keys'],
+            ['her=Jane Doe&him=John%20Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes encoding in values'],
+            ['foo=bar&&&test&&', 'foo=bar&test=', 'removes unneeded delimiters'],
+            ['formula=e=m*c^2', 'formula=e%3Dm%2Ac%5E2', 'correctly treats only the first "=" as delimiter and the next as value'],
 
             // Ignore pairs with empty key, even if there was a value, e.g. "=value", as such nameless values cannot be retrieved anyway.
             // PHP also does not include them when building _GET.
-            array('foo=bar&=a=b&=x=y', 'foo=bar', 'removes params with empty key'),
+            ['foo=bar&=a=b&=x=y', 'foo=bar', 'removes params with empty key'],
 
             // Don't reorder nested query string keys
-            array('foo[]=Z&foo[]=A', 'foo%5B0%5D=Z&foo%5B1%5D=A', 'keeps order of values'),
-            array('foo[Z]=B&foo[A]=B', 'foo%5BZ%5D=B&foo%5BA%5D=B', 'keeps order of keys'),
+            ['foo[]=Z&foo[]=A', 'foo%5B0%5D=Z&foo%5B1%5D=A', 'keeps order of values'],
+            ['foo[Z]=B&foo[A]=B', 'foo%5BZ%5D=B&foo%5BA%5D=B', 'keeps order of keys'],
 
-            array('utf8=✓', 'utf8=%E2%9C%93', 'encodes UTF-8'),
-        );
+            ['utf8=✓', 'utf8=%E2%9C%93', 'encodes UTF-8'],
+        ];
     }
 
     public function testGetQueryStringReturnsNull()
@@ -820,74 +820,74 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $request->initialize(array('foo' => 'bar'));
+        $request->initialize(['foo' => 'bar']);
         $this->assertEquals('', $request->getHost(), '->getHost() return empty string if not initialized');
 
-        $request->initialize(array(), array(), array(), array(), array(), array('HTTP_HOST' => 'www.example.com'));
+        $request->initialize([], [], [], [], [], ['HTTP_HOST' => 'www.example.com']);
         $this->assertEquals('www.example.com', $request->getHost(), '->getHost() from Host Header');
 
         // Host header with port number
-        $request->initialize(array(), array(), array(), array(), array(), array('HTTP_HOST' => 'www.example.com:8080'));
+        $request->initialize([], [], [], [], [], ['HTTP_HOST' => 'www.example.com:8080']);
         $this->assertEquals('www.example.com', $request->getHost(), '->getHost() from Host Header with port number');
 
         // Server values
-        $request->initialize(array(), array(), array(), array(), array(), array('SERVER_NAME' => 'www.example.com'));
+        $request->initialize([], [], [], [], [], ['SERVER_NAME' => 'www.example.com']);
         $this->assertEquals('www.example.com', $request->getHost(), '->getHost() from server name');
 
-        $request->initialize(array(), array(), array(), array(), array(), array('SERVER_NAME' => 'www.example.com', 'HTTP_HOST' => 'www.host.com'));
+        $request->initialize([], [], [], [], [], ['SERVER_NAME' => 'www.example.com', 'HTTP_HOST' => 'www.host.com']);
         $this->assertEquals('www.host.com', $request->getHost(), '->getHost() value from Host header has priority over SERVER_NAME ');
     }
 
     public function testGetPort()
     {
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'https',
             'HTTP_X_FORWARDED_PORT' => '443',
-        ));
+        ]);
         $port = $request->getPort();
 
         $this->assertEquals(80, $port, 'Without trusted proxies FORWARDED_PROTO and FORWARDED_PORT are ignored.');
 
-        Request::setTrustedProxies(array('1.1.1.1'), Request::HEADER_X_FORWARDED_ALL);
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        Request::setTrustedProxies(['1.1.1.1'], Request::HEADER_X_FORWARDED_ALL);
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'https',
             'HTTP_X_FORWARDED_PORT' => '8443',
-        ));
+        ]);
         $this->assertEquals(80, $request->getPort(), 'With PROTO and PORT on untrusted connection server value takes precedence.');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertEquals(8443, $request->getPort(), 'With PROTO and PORT set PORT takes precedence.');
 
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'https',
-        ));
+        ]);
         $this->assertEquals(80, $request->getPort(), 'With only PROTO set getPort() ignores trusted headers on untrusted connection.');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertEquals(443, $request->getPort(), 'With only PROTO set getPort() defaults to 443.');
 
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'http',
-        ));
+        ]);
         $this->assertEquals(80, $request->getPort(), 'If X_FORWARDED_PROTO is set to HTTP getPort() ignores trusted headers on untrusted connection.');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertEquals(80, $request->getPort(), 'If X_FORWARDED_PROTO is set to HTTP getPort() returns port of the original request.');
 
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'On',
-        ));
+        ]);
         $this->assertEquals(80, $request->getPort(), 'With only PROTO set and value is On, getPort() ignores trusted headers on untrusted connection.');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertEquals(443, $request->getPort(), 'With only PROTO set and value is On, getPort() defaults to 443.');
 
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => '1',
-        ));
+        ]);
         $this->assertEquals(80, $request->getPort(), 'With only PROTO set and value is 1, getPort() ignores trusted headers on untrusted connection.');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertEquals(443, $request->getPort(), 'With only PROTO set and value is 1, getPort() defaults to 443.');
 
-        $request = Request::create('http://example.com', 'GET', array(), array(), array(), array(
+        $request = Request::create('http://example.com', 'GET', [], [], [], [
             'HTTP_X_FORWARDED_PROTO' => 'something-else',
-        ));
+        ]);
         $port = $request->getPort();
         $this->assertEquals(80, $port, 'With only PROTO set and value is not recognized, getPort() defaults to 80.');
     }
@@ -898,7 +898,7 @@ class RequestTest extends TestCase
     public function testGetHostWithFakeHttpHostValue()
     {
         $request = new Request();
-        $request->initialize(array(), array(), array(), array(), array(), array('HTTP_HOST' => 'www.host.com?query=string'));
+        $request->initialize([], [], [], [], [], ['HTTP_HOST' => 'www.host.com?query=string']);
         $request->getHost();
     }
 
@@ -958,7 +958,7 @@ class RequestTest extends TestCase
 
         $request = new Request();
         $request->setMethod('POST');
-        $request->query->set('_method', array('delete', 'patch'));
+        $request->query->set('_method', ['delete', 'patch']);
         $this->assertSame('POST', $request->getMethod(), '->getMethod() returns the request method if invalid type is defined in query');
     }
 
@@ -995,69 +995,69 @@ class RequestTest extends TestCase
     public function getClientIpsForwardedProvider()
     {
         //              $expected                                  $remoteAddr  $httpForwarded                                       $trustedProxies
-        return array(
-            array(array('127.0.0.1'),                              '127.0.0.1', 'for="_gazonk"',                                      null),
-            array(array('127.0.0.1'),                              '127.0.0.1', 'for="_gazonk"',                                      array('127.0.0.1')),
-            array(array('88.88.88.88'),                            '127.0.0.1', 'for="88.88.88.88:80"',                               array('127.0.0.1')),
-            array(array('192.0.2.60'),                             '::1',       'for=192.0.2.60;proto=http;by=203.0.113.43',          array('::1')),
-            array(array('2620:0:1cfe:face:b00c::3', '192.0.2.43'), '::1',       'for=192.0.2.43, for="[2620:0:1cfe:face:b00c::3]"',   array('::1')),
-            array(array('2001:db8:cafe::17'),                      '::1',       'for="[2001:db8:cafe::17]:4711',                      array('::1')),
-        );
+        return [
+            [['127.0.0.1'],                              '127.0.0.1', 'for="_gazonk"',                                      null],
+            [['127.0.0.1'],                              '127.0.0.1', 'for="_gazonk"',                                      ['127.0.0.1']],
+            [['88.88.88.88'],                            '127.0.0.1', 'for="88.88.88.88:80"',                               ['127.0.0.1']],
+            [['192.0.2.60'],                             '::1',       'for=192.0.2.60;proto=http;by=203.0.113.43',          ['::1']],
+            [['2620:0:1cfe:face:b00c::3', '192.0.2.43'], '::1',       'for=192.0.2.43, for="[2620:0:1cfe:face:b00c::3]"',   ['::1']],
+            [['2001:db8:cafe::17'],                      '::1',       'for="[2001:db8:cafe::17]:4711',                      ['::1']],
+        ];
     }
 
     public function getClientIpsProvider()
     {
         //        $expected                          $remoteAddr                 $httpForwardedFor            $trustedProxies
-        return array(
+        return [
             // simple IPv4
-            array(array('88.88.88.88'),              '88.88.88.88',              null,                        null),
+            [['88.88.88.88'],              '88.88.88.88',              null,                        null],
             // trust the IPv4 remote addr
-            array(array('88.88.88.88'),              '88.88.88.88',              null,                        array('88.88.88.88')),
+            [['88.88.88.88'],              '88.88.88.88',              null,                        ['88.88.88.88']],
 
             // simple IPv6
-            array(array('::1'),                      '::1',                      null,                        null),
+            [['::1'],                      '::1',                      null,                        null],
             // trust the IPv6 remote addr
-            array(array('::1'),                      '::1',                      null,                        array('::1')),
+            [['::1'],                      '::1',                      null,                        ['::1']],
 
             // forwarded for with remote IPv4 addr not trusted
-            array(array('127.0.0.1'),                '127.0.0.1',                '88.88.88.88',               null),
+            [['127.0.0.1'],                '127.0.0.1',                '88.88.88.88',               null],
             // forwarded for with remote IPv4 addr trusted + comma
-            array(array('88.88.88.88'),              '127.0.0.1',                '88.88.88.88,',              array('127.0.0.1')),
+            [['88.88.88.88'],              '127.0.0.1',                '88.88.88.88,',              ['127.0.0.1']],
             // forwarded for with remote IPv4 and all FF addrs trusted
-            array(array('88.88.88.88'),              '127.0.0.1',                '88.88.88.88',               array('127.0.0.1', '88.88.88.88')),
+            [['88.88.88.88'],              '127.0.0.1',                '88.88.88.88',               ['127.0.0.1', '88.88.88.88']],
             // forwarded for with remote IPv4 range trusted
-            array(array('88.88.88.88'),              '123.45.67.89',             '88.88.88.88',               array('123.45.67.0/24')),
+            [['88.88.88.88'],              '123.45.67.89',             '88.88.88.88',               ['123.45.67.0/24']],
 
             // forwarded for with remote IPv6 addr not trusted
-            array(array('1620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3',  null),
+            [['1620:0:1cfe:face:b00c::3'], '1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3',  null],
             // forwarded for with remote IPv6 addr trusted
-            array(array('2620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3',  array('1620:0:1cfe:face:b00c::3')),
+            [['2620:0:1cfe:face:b00c::3'], '1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3',  ['1620:0:1cfe:face:b00c::3']],
             // forwarded for with remote IPv6 range trusted
-            array(array('88.88.88.88'),              '2a01:198:603:0:396e:4789:8e99:890f', '88.88.88.88',     array('2a01:198:603:0::/65')),
+            [['88.88.88.88'],              '2a01:198:603:0:396e:4789:8e99:890f', '88.88.88.88',     ['2a01:198:603:0::/65']],
 
             // multiple forwarded for with remote IPv4 addr trusted
-            array(array('88.88.88.88', '87.65.43.21', '127.0.0.1'), '123.45.67.89', '127.0.0.1, 87.65.43.21, 88.88.88.88', array('123.45.67.89')),
+            [['88.88.88.88', '87.65.43.21', '127.0.0.1'], '123.45.67.89', '127.0.0.1, 87.65.43.21, 88.88.88.88', ['123.45.67.89']],
             // multiple forwarded for with remote IPv4 addr and some reverse proxies trusted
-            array(array('87.65.43.21', '127.0.0.1'), '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', array('123.45.67.89', '88.88.88.88')),
+            [['87.65.43.21', '127.0.0.1'], '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', ['123.45.67.89', '88.88.88.88']],
             // multiple forwarded for with remote IPv4 addr and some reverse proxies trusted but in the middle
-            array(array('88.88.88.88', '127.0.0.1'), '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', array('123.45.67.89', '87.65.43.21')),
+            [['88.88.88.88', '127.0.0.1'], '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', ['123.45.67.89', '87.65.43.21']],
             // multiple forwarded for with remote IPv4 addr and all reverse proxies trusted
-            array(array('127.0.0.1'),                '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', array('123.45.67.89', '87.65.43.21', '88.88.88.88', '127.0.0.1')),
+            [['127.0.0.1'],                '123.45.67.89',             '127.0.0.1, 87.65.43.21, 88.88.88.88', ['123.45.67.89', '87.65.43.21', '88.88.88.88', '127.0.0.1']],
 
             // multiple forwarded for with remote IPv6 addr trusted
-            array(array('2620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', array('1620:0:1cfe:face:b00c::3')),
+            [['2620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3'], '1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', ['1620:0:1cfe:face:b00c::3']],
             // multiple forwarded for with remote IPv6 addr and some reverse proxies trusted
-            array(array('3620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', array('1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3')),
+            [['3620:0:1cfe:face:b00c::3'], '1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', ['1620:0:1cfe:face:b00c::3', '2620:0:1cfe:face:b00c::3']],
             // multiple forwarded for with remote IPv4 addr and some reverse proxies trusted but in the middle
-            array(array('2620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3'), '1620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3,3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', array('1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3')),
+            [['2620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3'], '1620:0:1cfe:face:b00c::3', '4620:0:1cfe:face:b00c::3,3620:0:1cfe:face:b00c::3,2620:0:1cfe:face:b00c::3', ['1620:0:1cfe:face:b00c::3', '3620:0:1cfe:face:b00c::3']],
 
             // client IP with port
-            array(array('88.88.88.88'), '127.0.0.1', '88.88.88.88:12345, 127.0.0.1', array('127.0.0.1')),
+            [['88.88.88.88'], '127.0.0.1', '88.88.88.88:12345, 127.0.0.1', ['127.0.0.1']],
 
             // invalid forwarded IP is ignored
-            array(array('88.88.88.88'), '127.0.0.1', 'unknown,88.88.88.88', array('127.0.0.1')),
-            array(array('88.88.88.88'), '127.0.0.1', '}__test|O:21:&quot;JDatabaseDriverMysqli&quot;:3:{s:2,88.88.88.88', array('127.0.0.1')),
-        );
+            [['88.88.88.88'], '127.0.0.1', 'unknown,88.88.88.88', ['127.0.0.1']],
+            [['88.88.88.88'], '127.0.0.1', '}__test|O:21:&quot;JDatabaseDriverMysqli&quot;:3:{s:2,88.88.88.88', ['127.0.0.1']],
+        ];
     }
 
     /**
@@ -1068,15 +1068,15 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array(
+        $server = [
             'REMOTE_ADDR' => '88.88.88.88',
             'HTTP_FORWARDED' => $httpForwarded,
             'HTTP_X_FORWARDED_FOR' => $httpXForwardedFor,
-        );
+        ];
 
-        Request::setTrustedProxies(array('88.88.88.88'), Request::HEADER_X_FORWARDED_ALL | Request::HEADER_FORWARDED);
+        Request::setTrustedProxies(['88.88.88.88'], Request::HEADER_X_FORWARDED_ALL | Request::HEADER_FORWARDED);
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $request->getClientIps();
     }
@@ -1088,15 +1088,15 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array(
+        $server = [
             'REMOTE_ADDR' => '88.88.88.88',
             'HTTP_FORWARDED' => $httpForwarded,
             'HTTP_X_FORWARDED_FOR' => $httpXForwardedFor,
-        );
+        ];
 
-        Request::setTrustedProxies(array('88.88.88.88'), Request::HEADER_X_FORWARDED_FOR);
+        Request::setTrustedProxies(['88.88.88.88'], Request::HEADER_X_FORWARDED_FOR);
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertSame(array_reverse(explode(',', $httpXForwardedFor)), $request->getClientIps());
     }
@@ -1104,13 +1104,13 @@ class RequestTest extends TestCase
     public function getClientIpsWithConflictingHeadersProvider()
     {
         //        $httpForwarded                   $httpXForwardedFor
-        return array(
-            array('for=87.65.43.21',                 '192.0.2.60'),
-            array('for=87.65.43.21, for=192.0.2.60', '192.0.2.60'),
-            array('for=192.0.2.60',                  '192.0.2.60,87.65.43.21'),
-            array('for="::face", for=192.0.2.60',    '192.0.2.60,192.0.2.43'),
-            array('for=87.65.43.21, for=192.0.2.60', '192.0.2.60,87.65.43.21'),
-        );
+        return [
+            ['for=87.65.43.21',                 '192.0.2.60'],
+            ['for=87.65.43.21, for=192.0.2.60', '192.0.2.60'],
+            ['for=192.0.2.60',                  '192.0.2.60,87.65.43.21'],
+            ['for="::face", for=192.0.2.60',    '192.0.2.60,192.0.2.43'],
+            ['for=87.65.43.21, for=192.0.2.60', '192.0.2.60,87.65.43.21'],
+        ];
     }
 
     /**
@@ -1120,15 +1120,15 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array(
+        $server = [
             'REMOTE_ADDR' => '88.88.88.88',
             'HTTP_FORWARDED' => $httpForwarded,
             'HTTP_X_FORWARDED_FOR' => $httpXForwardedFor,
-        );
+        ];
 
-        Request::setTrustedProxies(array('88.88.88.88'), -1);
+        Request::setTrustedProxies(['88.88.88.88'], -1);
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $clientIps = $request->getClientIps();
 
@@ -1138,14 +1138,14 @@ class RequestTest extends TestCase
     public function getClientIpsWithAgreeingHeadersProvider()
     {
         //        $httpForwarded                               $httpXForwardedFor
-        return array(
-            array('for="192.0.2.60"',                          '192.0.2.60',             array('192.0.2.60')),
-            array('for=192.0.2.60, for=87.65.43.21',           '192.0.2.60,87.65.43.21', array('87.65.43.21', '192.0.2.60')),
-            array('for="[::face]", for=192.0.2.60',            '::face,192.0.2.60',      array('192.0.2.60', '::face')),
-            array('for="192.0.2.60:80"',                       '192.0.2.60',             array('192.0.2.60')),
-            array('for=192.0.2.60;proto=http;by=203.0.113.43', '192.0.2.60',             array('192.0.2.60')),
-            array('for="[2001:db8:cafe::17]:4711"',            '2001:db8:cafe::17',      array('2001:db8:cafe::17')),
-        );
+        return [
+            ['for="192.0.2.60"',                          '192.0.2.60',             ['192.0.2.60']],
+            ['for=192.0.2.60, for=87.65.43.21',           '192.0.2.60,87.65.43.21', ['87.65.43.21', '192.0.2.60']],
+            ['for="[::face]", for=192.0.2.60',            '::face,192.0.2.60',      ['192.0.2.60', '::face']],
+            ['for="192.0.2.60:80"',                       '192.0.2.60',             ['192.0.2.60']],
+            ['for=192.0.2.60;proto=http;by=203.0.113.43', '192.0.2.60',             ['192.0.2.60']],
+            ['for="[2001:db8:cafe::17]:4711"',            '2001:db8:cafe::17',      ['2001:db8:cafe::17']],
+        ];
     }
 
     public function testGetContentWorksTwiceInDefaultMode()
@@ -1166,7 +1166,7 @@ class RequestTest extends TestCase
 
     public function testGetContentReturnsResourceWhenContentSetInConstructor()
     {
-        $req = new Request(array(), array(), array(), array(), array(), array(), 'MyContent');
+        $req = new Request([], [], [], [], [], [], 'MyContent');
         $resource = $req->getContent(true);
 
         $this->assertInternalType('resource', $resource);
@@ -1179,17 +1179,17 @@ class RequestTest extends TestCase
         fwrite($resource, 'My other content');
         rewind($resource);
 
-        $req = new Request(array(), array(), array(), array(), array(), array(), $resource);
+        $req = new Request([], [], [], [], [], [], $resource);
         $this->assertEquals('My other content', stream_get_contents($req->getContent(true)));
         $this->assertEquals('My other content', $req->getContent());
     }
 
     public function getContentCantBeCalledTwiceWithResourcesProvider()
     {
-        return array(
-            'Resource then fetch' => array(true, false),
-            'Resource then resource' => array(true, true),
-        );
+        return [
+            'Resource then fetch' => [true, false],
+            'Resource then resource' => [true, true],
+        ];
     }
 
     /**
@@ -1214,24 +1214,24 @@ class RequestTest extends TestCase
 
     public function getContentCanBeCalledTwiceWithResourcesProvider()
     {
-        return array(
-            'Fetch then fetch' => array(false, false),
-            'Fetch then resource' => array(false, true),
-            'Resource then fetch' => array(true, false),
-            'Resource then resource' => array(true, true),
-        );
+        return [
+            'Fetch then fetch' => [false, false],
+            'Fetch then resource' => [false, true],
+            'Resource then fetch' => [true, false],
+            'Resource then resource' => [true, true],
+        ];
     }
 
     public function provideOverloadedMethods()
     {
-        return array(
-            array('PUT'),
-            array('DELETE'),
-            array('PATCH'),
-            array('put'),
-            array('delete'),
-            array('patch'),
-        );
+        return [
+            ['PUT'],
+            ['DELETE'],
+            ['PATCH'],
+            ['put'],
+            ['delete'],
+            ['patch'],
+        ];
     }
 
     /**
@@ -1244,14 +1244,14 @@ class RequestTest extends TestCase
         $_GET['foo1'] = 'bar1';
         $_POST['foo2'] = 'bar2';
         $_COOKIE['foo3'] = 'bar3';
-        $_FILES['foo4'] = array('bar4');
+        $_FILES['foo4'] = ['bar4'];
         $_SERVER['foo5'] = 'bar5';
 
         $request = Request::createFromGlobals();
         $this->assertEquals('bar1', $request->query->get('foo1'), '::fromGlobals() uses values from $_GET');
         $this->assertEquals('bar2', $request->request->get('foo2'), '::fromGlobals() uses values from $_POST');
         $this->assertEquals('bar3', $request->cookies->get('foo3'), '::fromGlobals() uses values from $_COOKIE');
-        $this->assertEquals(array('bar4'), $request->files->get('foo4'), '::fromGlobals() uses values from $_FILES');
+        $this->assertEquals(['bar4'], $request->files->get('foo4'), '::fromGlobals() uses values from $_FILES');
         $this->assertEquals('bar5', $request->server->get('foo5'), '::fromGlobals() uses values from $_SERVER');
 
         unset($_GET['foo1'], $_POST['foo2'], $_COOKIE['foo3'], $_FILES['foo4'], $_SERVER['foo5']);
@@ -1281,25 +1281,25 @@ class RequestTest extends TestCase
     public function testOverrideGlobals()
     {
         $request = new Request();
-        $request->initialize(array('foo' => 'bar'));
+        $request->initialize(['foo' => 'bar']);
 
         // as the Request::overrideGlobals really work, it erase $_SERVER, so we must backup it
         $server = $_SERVER;
 
         $request->overrideGlobals();
 
-        $this->assertEquals(array('foo' => 'bar'), $_GET);
+        $this->assertEquals(['foo' => 'bar'], $_GET);
 
-        $request->initialize(array(), array('foo' => 'bar'));
+        $request->initialize([], ['foo' => 'bar']);
         $request->overrideGlobals();
 
-        $this->assertEquals(array('foo' => 'bar'), $_POST);
+        $this->assertEquals(['foo' => 'bar'], $_POST);
 
         $this->assertArrayNotHasKey('HTTP_X_FORWARDED_PROTO', $_SERVER);
 
         $request->headers->set('X_FORWARDED_PROTO', 'https');
 
-        Request::setTrustedProxies(array('1.1.1.1'), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies(['1.1.1.1'], Request::HEADER_X_FORWARDED_ALL);
         $this->assertFalse($request->isSecure());
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $this->assertTrue($request->isSecure());
@@ -1316,12 +1316,12 @@ class RequestTest extends TestCase
         $this->assertArrayHasKey('CONTENT_TYPE', $_SERVER);
         $this->assertArrayHasKey('CONTENT_LENGTH', $_SERVER);
 
-        $request->initialize(array('foo' => 'bar', 'baz' => 'foo'));
+        $request->initialize(['foo' => 'bar', 'baz' => 'foo']);
         $request->query->remove('baz');
 
         $request->overrideGlobals();
 
-        $this->assertEquals(array('foo' => 'bar'), $_GET);
+        $this->assertEquals(['foo' => 'bar'], $_GET);
         $this->assertEquals('foo=bar', $_SERVER['QUERY_STRING']);
         $this->assertEquals('foo=bar', $request->server->get('QUERY_STRING'));
 
@@ -1334,23 +1334,23 @@ class RequestTest extends TestCase
         $request = new Request();
         $this->assertEquals('', $request->getScriptName());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_NAME'] = '/index.php';
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/index.php', $request->getScriptName());
 
-        $server = array();
+        $server = [];
         $server['ORIG_SCRIPT_NAME'] = '/frontend.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/frontend.php', $request->getScriptName());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_NAME'] = '/index.php';
         $server['ORIG_SCRIPT_NAME'] = '/frontend.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/index.php', $request->getScriptName());
     }
@@ -1360,29 +1360,29 @@ class RequestTest extends TestCase
         $request = new Request();
         $this->assertEquals('', $request->getBasePath());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
         $this->assertEquals('', $request->getBasePath());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
         $server['SCRIPT_NAME'] = '/index.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('', $request->getBasePath());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
         $server['PHP_SELF'] = '/index.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('', $request->getBasePath());
 
-        $server = array();
+        $server = [];
         $server['SCRIPT_FILENAME'] = '/some/where/index.php';
         $server['ORIG_SCRIPT_NAME'] = '/index.php';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('', $request->getBasePath());
     }
@@ -1392,21 +1392,21 @@ class RequestTest extends TestCase
         $request = new Request();
         $this->assertEquals('/', $request->getPathInfo());
 
-        $server = array();
+        $server = [];
         $server['REQUEST_URI'] = '/path/info';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/path/info', $request->getPathInfo());
 
-        $server = array();
+        $server = [];
         $server['REQUEST_URI'] = '/path%20test/info';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/path%20test/info', $request->getPathInfo());
 
-        $server = array();
+        $server = [];
         $server['REQUEST_URI'] = '?a=b';
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         $this->assertEquals('/', $request->getPathInfo());
     }
@@ -1434,27 +1434,27 @@ class RequestTest extends TestCase
     {
         $request = new Request();
         $this->assertNull($request->getPreferredLanguage());
-        $this->assertNull($request->getPreferredLanguage(array()));
-        $this->assertEquals('fr', $request->getPreferredLanguage(array('fr')));
-        $this->assertEquals('fr', $request->getPreferredLanguage(array('fr', 'en')));
-        $this->assertEquals('en', $request->getPreferredLanguage(array('en', 'fr')));
-        $this->assertEquals('fr-ch', $request->getPreferredLanguage(array('fr-ch', 'fr-fr')));
+        $this->assertNull($request->getPreferredLanguage([]));
+        $this->assertEquals('fr', $request->getPreferredLanguage(['fr']));
+        $this->assertEquals('fr', $request->getPreferredLanguage(['fr', 'en']));
+        $this->assertEquals('en', $request->getPreferredLanguage(['en', 'fr']));
+        $this->assertEquals('fr-ch', $request->getPreferredLanguage(['fr-ch', 'fr-fr']));
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.8, en; q=0.6');
-        $this->assertEquals('en', $request->getPreferredLanguage(array('en', 'en-us')));
+        $this->assertEquals('en', $request->getPreferredLanguage(['en', 'en-us']));
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.8, en; q=0.6');
-        $this->assertEquals('en', $request->getPreferredLanguage(array('fr', 'en')));
+        $this->assertEquals('en', $request->getPreferredLanguage(['fr', 'en']));
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.8');
-        $this->assertEquals('en', $request->getPreferredLanguage(array('fr', 'en')));
+        $this->assertEquals('en', $request->getPreferredLanguage(['fr', 'en']));
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.8, fr-fr; q=0.6, fr; q=0.5');
-        $this->assertEquals('en', $request->getPreferredLanguage(array('fr', 'en')));
+        $this->assertEquals('en', $request->getPreferredLanguage(['fr', 'en']));
     }
 
     public function testIsXmlHttpRequest()
@@ -1492,72 +1492,72 @@ class RequestTest extends TestCase
     public function testGetCharsets()
     {
         $request = new Request();
-        $this->assertEquals(array(), $request->getCharsets());
+        $this->assertEquals([], $request->getCharsets());
         $request->headers->set('Accept-Charset', 'ISO-8859-1, US-ASCII, UTF-8; q=0.8, ISO-10646-UCS-2; q=0.6');
-        $this->assertEquals(array(), $request->getCharsets()); // testing caching
+        $this->assertEquals([], $request->getCharsets()); // testing caching
 
         $request = new Request();
         $request->headers->set('Accept-Charset', 'ISO-8859-1, US-ASCII, UTF-8; q=0.8, ISO-10646-UCS-2; q=0.6');
-        $this->assertEquals(array('ISO-8859-1', 'US-ASCII', 'UTF-8', 'ISO-10646-UCS-2'), $request->getCharsets());
+        $this->assertEquals(['ISO-8859-1', 'US-ASCII', 'UTF-8', 'ISO-10646-UCS-2'], $request->getCharsets());
 
         $request = new Request();
         $request->headers->set('Accept-Charset', 'ISO-8859-1,utf-8;q=0.7,*;q=0.7');
-        $this->assertEquals(array('ISO-8859-1', 'utf-8', '*'), $request->getCharsets());
+        $this->assertEquals(['ISO-8859-1', 'utf-8', '*'], $request->getCharsets());
     }
 
     public function testGetEncodings()
     {
         $request = new Request();
-        $this->assertEquals(array(), $request->getEncodings());
+        $this->assertEquals([], $request->getEncodings());
         $request->headers->set('Accept-Encoding', 'gzip,deflate,sdch');
-        $this->assertEquals(array(), $request->getEncodings()); // testing caching
+        $this->assertEquals([], $request->getEncodings()); // testing caching
 
         $request = new Request();
         $request->headers->set('Accept-Encoding', 'gzip,deflate,sdch');
-        $this->assertEquals(array('gzip', 'deflate', 'sdch'), $request->getEncodings());
+        $this->assertEquals(['gzip', 'deflate', 'sdch'], $request->getEncodings());
 
         $request = new Request();
         $request->headers->set('Accept-Encoding', 'gzip;q=0.4,deflate;q=0.9,compress;q=0.7');
-        $this->assertEquals(array('deflate', 'compress', 'gzip'), $request->getEncodings());
+        $this->assertEquals(['deflate', 'compress', 'gzip'], $request->getEncodings());
     }
 
     public function testGetAcceptableContentTypes()
     {
         $request = new Request();
-        $this->assertEquals(array(), $request->getAcceptableContentTypes());
+        $this->assertEquals([], $request->getAcceptableContentTypes());
         $request->headers->set('Accept', 'application/vnd.wap.wmlscriptc, text/vnd.wap.wml, application/vnd.wap.xhtml+xml, application/xhtml+xml, text/html, multipart/mixed, */*');
-        $this->assertEquals(array(), $request->getAcceptableContentTypes()); // testing caching
+        $this->assertEquals([], $request->getAcceptableContentTypes()); // testing caching
 
         $request = new Request();
         $request->headers->set('Accept', 'application/vnd.wap.wmlscriptc, text/vnd.wap.wml, application/vnd.wap.xhtml+xml, application/xhtml+xml, text/html, multipart/mixed, */*');
-        $this->assertEquals(array('application/vnd.wap.wmlscriptc', 'text/vnd.wap.wml', 'application/vnd.wap.xhtml+xml', 'application/xhtml+xml', 'text/html', 'multipart/mixed', '*/*'), $request->getAcceptableContentTypes());
+        $this->assertEquals(['application/vnd.wap.wmlscriptc', 'text/vnd.wap.wml', 'application/vnd.wap.xhtml+xml', 'application/xhtml+xml', 'text/html', 'multipart/mixed', '*/*'], $request->getAcceptableContentTypes());
     }
 
     public function testGetLanguages()
     {
         $request = new Request();
-        $this->assertEquals(array(), $request->getLanguages());
+        $this->assertEquals([], $request->getLanguages());
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.8, en; q=0.6');
-        $this->assertEquals(array('zh', 'en_US', 'en'), $request->getLanguages());
-        $this->assertEquals(array('zh', 'en_US', 'en'), $request->getLanguages());
+        $this->assertEquals(['zh', 'en_US', 'en'], $request->getLanguages());
+        $this->assertEquals(['zh', 'en_US', 'en'], $request->getLanguages());
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en-us; q=0.6, en; q=0.8');
-        $this->assertEquals(array('zh', 'en', 'en_US'), $request->getLanguages()); // Test out of order qvalues
+        $this->assertEquals(['zh', 'en', 'en_US'], $request->getLanguages()); // Test out of order qvalues
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, en, en-us');
-        $this->assertEquals(array('zh', 'en', 'en_US'), $request->getLanguages()); // Test equal weighting without qvalues
+        $this->assertEquals(['zh', 'en', 'en_US'], $request->getLanguages()); // Test equal weighting without qvalues
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh; q=0.6, en, en-us; q=0.6');
-        $this->assertEquals(array('en', 'zh', 'en_US'), $request->getLanguages()); // Test equal weighting with qvalues
+        $this->assertEquals(['en', 'zh', 'en_US'], $request->getLanguages()); // Test equal weighting with qvalues
 
         $request = new Request();
         $request->headers->set('Accept-language', 'zh, i-cherokee; q=0.6');
-        $this->assertEquals(array('zh', 'cherokee'), $request->getLanguages());
+        $this->assertEquals(['zh', 'cherokee'], $request->getLanguages());
     }
 
     public function testGetRequestFormat()
@@ -1577,7 +1577,7 @@ class RequestTest extends TestCase
         $this->assertNull($request->setRequestFormat('foo'));
         $this->assertEquals('foo', $request->getRequestFormat(null));
 
-        $request = new Request(array('_format' => 'foo'));
+        $request = new Request(['_format' => 'foo']);
         $this->assertEquals('html', $request->getRequestFormat());
     }
 
@@ -1663,7 +1663,7 @@ class RequestTest extends TestCase
      */
     public function testGetBaseUrl($uri, $server, $expectedBaseUrl, $expectedPathInfo)
     {
-        $request = Request::create($uri, 'GET', array(), array(), array(), $server);
+        $request = Request::create($uri, 'GET', [], [], [], $server);
 
         $this->assertSame($expectedBaseUrl, $request->getBaseUrl(), 'baseUrl');
         $this->assertSame($expectedPathInfo, $request->getPathInfo(), 'pathInfo');
@@ -1671,78 +1671,78 @@ class RequestTest extends TestCase
 
     public function getBaseUrlData()
     {
-        return array(
-            array(
+        return [
+            [
                 '/fruit/strawberry/1234index.php/blah',
-                array(
+                [
                     'SCRIPT_FILENAME' => 'E:/Sites/cc-new/public_html/fruit/index.php',
                     'SCRIPT_NAME' => '/fruit/index.php',
                     'PHP_SELF' => '/fruit/index.php',
-                ),
+                ],
                 '/fruit',
                 '/strawberry/1234index.php/blah',
-            ),
-            array(
+            ],
+            [
                 '/fruit/strawberry/1234index.php/blah',
-                array(
+                [
                     'SCRIPT_FILENAME' => 'E:/Sites/cc-new/public_html/index.php',
                     'SCRIPT_NAME' => '/index.php',
                     'PHP_SELF' => '/index.php',
-                ),
+                ],
                 '',
                 '/fruit/strawberry/1234index.php/blah',
-            ),
-            array(
+            ],
+            [
                 '/foo%20bar/',
-                array(
+                [
                     'SCRIPT_FILENAME' => '/home/John Doe/public_html/foo bar/app.php',
                     'SCRIPT_NAME' => '/foo bar/app.php',
                     'PHP_SELF' => '/foo bar/app.php',
-                ),
+                ],
                 '/foo%20bar',
                 '/',
-            ),
-            array(
+            ],
+            [
                 '/foo%20bar/home',
-                array(
+                [
                     'SCRIPT_FILENAME' => '/home/John Doe/public_html/foo bar/app.php',
                     'SCRIPT_NAME' => '/foo bar/app.php',
                     'PHP_SELF' => '/foo bar/app.php',
-                ),
+                ],
                 '/foo%20bar',
                 '/home',
-            ),
-            array(
+            ],
+            [
                 '/foo%20bar/app.php/home',
-                array(
+                [
                     'SCRIPT_FILENAME' => '/home/John Doe/public_html/foo bar/app.php',
                     'SCRIPT_NAME' => '/foo bar/app.php',
                     'PHP_SELF' => '/foo bar/app.php',
-                ),
+                ],
                 '/foo%20bar/app.php',
                 '/home',
-            ),
-            array(
+            ],
+            [
                 '/foo%20bar/app.php/home%3Dbaz',
-                array(
+                [
                     'SCRIPT_FILENAME' => '/home/John Doe/public_html/foo bar/app.php',
                     'SCRIPT_NAME' => '/foo bar/app.php',
                     'PHP_SELF' => '/foo bar/app.php',
-                ),
+                ],
                 '/foo%20bar/app.php',
                 '/home%3Dbaz',
-            ),
-            array(
+            ],
+            [
                 '/foo/bar+baz',
-                array(
+                [
                     'SCRIPT_FILENAME' => '/home/John Doe/public_html/foo/app.php',
                     'SCRIPT_NAME' => '/foo/app.php',
                     'PHP_SELF' => '/foo/app.php',
-                ),
+                ],
                 '/foo',
                 '/bar+baz',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -1760,16 +1760,16 @@ class RequestTest extends TestCase
 
     public function urlencodedStringPrefixData()
     {
-        return array(
-            array('foo', 'foo', 'foo'),
-            array('fo%6f', 'foo', 'fo%6f'),
-            array('foo/bar', 'foo', 'foo'),
-            array('fo%6f/bar', 'foo', 'fo%6f'),
-            array('f%6f%6f/bar', 'foo', 'f%6f%6f'),
-            array('%66%6F%6F/bar', 'foo', '%66%6F%6F'),
-            array('fo+o/bar', 'fo+o', 'fo+o'),
-            array('fo%2Bo/bar', 'fo+o', 'fo%2Bo'),
-        );
+        return [
+            ['foo', 'foo', 'foo'],
+            ['fo%6f', 'foo', 'fo%6f'],
+            ['foo/bar', 'foo', 'foo'],
+            ['fo%6f/bar', 'foo', 'fo%6f'],
+            ['f%6f%6f/bar', 'foo', 'f%6f%6f'],
+            ['%66%6F%6F/bar', 'foo', '%66%6F%6F'],
+            ['fo+o/bar', 'fo+o', 'fo+o'],
+            ['fo%2Bo/bar', 'fo+o', 'fo%2Bo'],
+        ];
     }
 
     private function disableHttpMethodParameterOverride()
@@ -1784,7 +1784,7 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array('REMOTE_ADDR' => $remoteAddr);
+        $server = ['REMOTE_ADDR' => $remoteAddr];
         if (null !== $httpForwardedFor) {
             $server['HTTP_X_FORWARDED_FOR'] = $httpForwardedFor;
         }
@@ -1793,7 +1793,7 @@ class RequestTest extends TestCase
             Request::setTrustedProxies($trustedProxies, Request::HEADER_X_FORWARDED_ALL);
         }
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         return $request;
     }
@@ -1802,7 +1802,7 @@ class RequestTest extends TestCase
     {
         $request = new Request();
 
-        $server = array('REMOTE_ADDR' => $remoteAddr);
+        $server = ['REMOTE_ADDR' => $remoteAddr];
 
         if (null !== $httpForwarded) {
             $server['HTTP_FORWARDED'] = $httpForwarded;
@@ -1812,7 +1812,7 @@ class RequestTest extends TestCase
             Request::setTrustedProxies($trustedProxies, Request::HEADER_FORWARDED);
         }
 
-        $request->initialize(array(), array(), array(), array(), array(), $server);
+        $request->initialize([], [], [], [], [], $server);
 
         return $request;
     }
@@ -1833,35 +1833,35 @@ class RequestTest extends TestCase
         $this->assertFalse($request->isSecure());
 
         // disabling proxy trusting
-        Request::setTrustedProxies(array(), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies([], Request::HEADER_X_FORWARDED_ALL);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // request is forwarded by a non-trusted proxy
-        Request::setTrustedProxies(array('2.2.2.2'), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies(['2.2.2.2'], Request::HEADER_X_FORWARDED_ALL);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // trusted proxy via setTrustedProxies()
-        Request::setTrustedProxies(array('3.3.3.3', '2.2.2.2'), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies(['3.3.3.3', '2.2.2.2'], Request::HEADER_X_FORWARDED_ALL);
         $this->assertEquals('1.1.1.1', $request->getClientIp());
         $this->assertEquals('foo.example.com', $request->getHost());
         $this->assertEquals(443, $request->getPort());
         $this->assertTrue($request->isSecure());
 
         // trusted proxy via setTrustedProxies()
-        Request::setTrustedProxies(array('3.3.3.4', '2.2.2.2'), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies(['3.3.3.4', '2.2.2.2'], Request::HEADER_X_FORWARDED_ALL);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // check various X_FORWARDED_PROTO header values
-        Request::setTrustedProxies(array('3.3.3.3', '2.2.2.2'), Request::HEADER_X_FORWARDED_ALL);
+        Request::setTrustedProxies(['3.3.3.3', '2.2.2.2'], Request::HEADER_X_FORWARDED_ALL);
         $request->headers->set('X_FORWARDED_PROTO', 'ssl');
         $this->assertTrue($request->isSecure());
 
@@ -1882,35 +1882,35 @@ class RequestTest extends TestCase
         $this->assertFalse($request->isSecure());
 
         // disabling proxy trusting
-        Request::setTrustedProxies(array(), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies([], Request::HEADER_FORWARDED);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // request is forwarded by a non-trusted proxy
-        Request::setTrustedProxies(array('2.2.2.2'), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies(['2.2.2.2'], Request::HEADER_FORWARDED);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // trusted proxy via setTrustedProxies()
-        Request::setTrustedProxies(array('3.3.3.3', '2.2.2.2'), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies(['3.3.3.3', '2.2.2.2'], Request::HEADER_FORWARDED);
         $this->assertEquals('1.1.1.1', $request->getClientIp());
         $this->assertEquals('foo.example.com', $request->getHost());
         $this->assertEquals(8080, $request->getPort());
         $this->assertTrue($request->isSecure());
 
         // trusted proxy via setTrustedProxies()
-        Request::setTrustedProxies(array('3.3.3.4', '2.2.2.2'), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies(['3.3.3.4', '2.2.2.2'], Request::HEADER_FORWARDED);
         $this->assertEquals('3.3.3.3', $request->getClientIp());
         $this->assertEquals('example.com', $request->getHost());
         $this->assertEquals(80, $request->getPort());
         $this->assertFalse($request->isSecure());
 
         // check various X_FORWARDED_PROTO header values
-        Request::setTrustedProxies(array('3.3.3.3', '2.2.2.2'), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies(['3.3.3.3', '2.2.2.2'], Request::HEADER_FORWARDED);
         $request->headers->set('FORWARDED', 'proto=ssl');
         $this->assertTrue($request->isSecure());
 
@@ -1930,37 +1930,37 @@ class RequestTest extends TestCase
         $this->assertEquals($expectedRequestUri, $request->getRequestUri(), '->getRequestUri() is correct');
 
         $subRequestUri = '/bar/foo';
-        $subRequest = Request::create($subRequestUri, 'get', array(), array(), array(), $request->server->all());
+        $subRequest = Request::create($subRequestUri, 'get', [], [], [], $request->server->all());
         $this->assertEquals($subRequestUri, $subRequest->getRequestUri(), '->getRequestUri() is correct in sub request');
     }
 
     public function iisRequestUriProvider()
     {
-        return array(
-            array(
-                array(),
-                array(
+        return [
+            [
+                [],
+                [
                     'IIS_WasUrlRewritten' => '1',
                     'UNENCODED_URL' => '/foo/bar',
-                ),
+                ],
                 '/foo/bar',
-            ),
-            array(
-                array(),
-                array(
+            ],
+            [
+                [],
+                [
                     'ORIG_PATH_INFO' => '/foo/bar',
-                ),
+                ],
                 '/foo/bar',
-            ),
-            array(
-                array(),
-                array(
+            ],
+            [
+                [],
+                [
                     'ORIG_PATH_INFO' => '/foo/bar',
                     'QUERY_STRING' => 'foo=bar',
-                ),
+                ],
                 '/foo/bar?foo=bar',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testTrustedHosts()
@@ -1973,7 +1973,7 @@ class RequestTest extends TestCase
         $this->assertEquals('evil.com', $request->getHost());
 
         // add a trusted domain and all its subdomains
-        Request::setTrustedHosts(array('^([a-z]{9}\.)?trusted\.com$'));
+        Request::setTrustedHosts(['^([a-z]{9}\.)?trusted\.com$']);
 
         // untrusted host
         $request->headers->set('host', 'evil.com');
@@ -2005,7 +2005,7 @@ class RequestTest extends TestCase
 
     public function testSetTrustedHostsDoesNotBreakOnSpecialCharacters()
     {
-        Request::setTrustedHosts(array('localhost(\.local){0,1}#,example.com', 'localhost'));
+        Request::setTrustedHosts(['localhost(\.local){0,1}#,example.com', 'localhost']);
 
         $request = Request::create('/');
         $request->headers->set('host', 'localhost');
@@ -2014,7 +2014,7 @@ class RequestTest extends TestCase
 
     public function testFactory()
     {
-        Request::setFactory(function (array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null) {
+        Request::setFactory(function (array $query = [], array $request = [], array $attributes = [], array $cookies = [], array $files = [], array $server = [], $content = null) {
             return new NewRequest();
         });
 
@@ -2063,23 +2063,23 @@ class RequestTest extends TestCase
 
     public function getHostValidities()
     {
-        return array(
-            array('.a', false),
-            array('a..', false),
-            array('a.', true),
-            array("\xE9", false),
-            array('[::1]', true),
-            array('[::1]:80', true, '[::1]', 80),
-            array(str_repeat('.', 101), false),
-        );
+        return [
+            ['.a', false],
+            ['a..', false],
+            ['a.', true],
+            ["\xE9", false],
+            ['[::1]', true],
+            ['[::1]:80', true, '[::1]', 80],
+            [str_repeat('.', 101), false],
+        ];
     }
 
     public function getLongHostNames()
     {
-        return array(
-            array('a'.str_repeat('.a', 40000)),
-            array(str_repeat(':', 101)),
-        );
+        return [
+            ['a'.str_repeat('.a', 40000)],
+            [str_repeat(':', 101)],
+        ];
     }
 
     /**
@@ -2094,18 +2094,18 @@ class RequestTest extends TestCase
 
     public function methodIdempotentProvider()
     {
-        return array(
-            array('HEAD', true),
-            array('GET', true),
-            array('POST', false),
-            array('PUT', true),
-            array('PATCH', false),
-            array('DELETE', true),
-            array('PURGE', true),
-            array('OPTIONS', true),
-            array('TRACE', true),
-            array('CONNECT', false),
-        );
+        return [
+            ['HEAD', true],
+            ['GET', true],
+            ['POST', false],
+            ['PUT', true],
+            ['PATCH', false],
+            ['DELETE', true],
+            ['PURGE', true],
+            ['OPTIONS', true],
+            ['TRACE', true],
+            ['CONNECT', false],
+        ];
     }
 
     /**
@@ -2120,18 +2120,18 @@ class RequestTest extends TestCase
 
     public function methodSafeProvider()
     {
-        return array(
-            array('HEAD', true),
-            array('GET', true),
-            array('POST', false),
-            array('PUT', false),
-            array('PATCH', false),
-            array('DELETE', false),
-            array('PURGE', false),
-            array('OPTIONS', true),
-            array('TRACE', true),
-            array('CONNECT', false),
-        );
+        return [
+            ['HEAD', true],
+            ['GET', true],
+            ['POST', false],
+            ['PUT', false],
+            ['PATCH', false],
+            ['DELETE', false],
+            ['PURGE', false],
+            ['OPTIONS', true],
+            ['TRACE', true],
+            ['CONNECT', false],
+        ];
     }
 
     /**
@@ -2156,18 +2156,18 @@ class RequestTest extends TestCase
 
     public function methodCacheableProvider()
     {
-        return array(
-            array('HEAD', true),
-            array('GET', true),
-            array('POST', false),
-            array('PUT', false),
-            array('PATCH', false),
-            array('DELETE', false),
-            array('PURGE', false),
-            array('OPTIONS', false),
-            array('TRACE', false),
-            array('CONNECT', false),
-        );
+        return [
+            ['HEAD', true],
+            ['GET', true],
+            ['POST', false],
+            ['PUT', false],
+            ['PATCH', false],
+            ['DELETE', false],
+            ['PURGE', false],
+            ['OPTIONS', false],
+            ['TRACE', false],
+            ['CONNECT', false],
+        ];
     }
 
     /**
@@ -2176,7 +2176,7 @@ class RequestTest extends TestCase
     public function testProtocolVersion($serverProtocol, $trustedProxy, $via, $expected)
     {
         if ($trustedProxy) {
-            Request::setTrustedProxies(array('1.1.1.1'), -1);
+            Request::setTrustedProxies(['1.1.1.1'], -1);
         }
 
         $request = new Request();
@@ -2189,41 +2189,41 @@ class RequestTest extends TestCase
 
     public function protocolVersionProvider()
     {
-        return array(
-            'untrusted without via' => array('HTTP/2.0', false, '', 'HTTP/2.0'),
-            'untrusted with via' => array('HTTP/2.0', false, '1.0 fred, 1.1 nowhere.com (Apache/1.1)', 'HTTP/2.0'),
-            'trusted without via' => array('HTTP/2.0', true, '', 'HTTP/2.0'),
-            'trusted with via' => array('HTTP/2.0', true, '1.0 fred, 1.1 nowhere.com (Apache/1.1)', 'HTTP/1.0'),
-            'trusted with via and protocol name' => array('HTTP/2.0', true, 'HTTP/1.0 fred, HTTP/1.1 nowhere.com (Apache/1.1)', 'HTTP/1.0'),
-            'trusted with broken via' => array('HTTP/2.0', true, 'HTTP/1^0 foo', 'HTTP/2.0'),
-            'trusted with partially-broken via' => array('HTTP/2.0', true, '1.0 fred, foo', 'HTTP/1.0'),
-        );
+        return [
+            'untrusted without via' => ['HTTP/2.0', false, '', 'HTTP/2.0'],
+            'untrusted with via' => ['HTTP/2.0', false, '1.0 fred, 1.1 nowhere.com (Apache/1.1)', 'HTTP/2.0'],
+            'trusted without via' => ['HTTP/2.0', true, '', 'HTTP/2.0'],
+            'trusted with via' => ['HTTP/2.0', true, '1.0 fred, 1.1 nowhere.com (Apache/1.1)', 'HTTP/1.0'],
+            'trusted with via and protocol name' => ['HTTP/2.0', true, 'HTTP/1.0 fred, HTTP/1.1 nowhere.com (Apache/1.1)', 'HTTP/1.0'],
+            'trusted with broken via' => ['HTTP/2.0', true, 'HTTP/1^0 foo', 'HTTP/2.0'],
+            'trusted with partially-broken via' => ['HTTP/2.0', true, '1.0 fred, foo', 'HTTP/1.0'],
+        ];
     }
 
     public function nonstandardRequestsData()
     {
-        return array(
-            array('',  '', '/', 'http://host:8080/', ''),
-            array('/', '', '/', 'http://host:8080/', ''),
+        return [
+            ['',  '', '/', 'http://host:8080/', ''],
+            ['/', '', '/', 'http://host:8080/', ''],
 
-            array('hello/app.php/x',  '', '/x', 'http://host:8080/hello/app.php/x', '/hello', '/hello/app.php'),
-            array('/hello/app.php/x', '', '/x', 'http://host:8080/hello/app.php/x', '/hello', '/hello/app.php'),
+            ['hello/app.php/x',  '', '/x', 'http://host:8080/hello/app.php/x', '/hello', '/hello/app.php'],
+            ['/hello/app.php/x', '', '/x', 'http://host:8080/hello/app.php/x', '/hello', '/hello/app.php'],
 
-            array('',      'a=b', '/', 'http://host:8080/?a=b'),
-            array('?a=b',  'a=b', '/', 'http://host:8080/?a=b'),
-            array('/?a=b', 'a=b', '/', 'http://host:8080/?a=b'),
+            ['',      'a=b', '/', 'http://host:8080/?a=b'],
+            ['?a=b',  'a=b', '/', 'http://host:8080/?a=b'],
+            ['/?a=b', 'a=b', '/', 'http://host:8080/?a=b'],
 
-            array('x',      'a=b', '/x', 'http://host:8080/x?a=b'),
-            array('x?a=b',  'a=b', '/x', 'http://host:8080/x?a=b'),
-            array('/x?a=b', 'a=b', '/x', 'http://host:8080/x?a=b'),
+            ['x',      'a=b', '/x', 'http://host:8080/x?a=b'],
+            ['x?a=b',  'a=b', '/x', 'http://host:8080/x?a=b'],
+            ['/x?a=b', 'a=b', '/x', 'http://host:8080/x?a=b'],
 
-            array('hello/x',  '', '/x', 'http://host:8080/hello/x', '/hello'),
-            array('/hello/x', '', '/x', 'http://host:8080/hello/x', '/hello'),
+            ['hello/x',  '', '/x', 'http://host:8080/hello/x', '/hello'],
+            ['/hello/x', '', '/x', 'http://host:8080/hello/x', '/hello'],
 
-            array('hello/app.php/x',      'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'),
-            array('hello/app.php/x?a=b',  'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'),
-            array('/hello/app.php/x?a=b', 'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'),
-        );
+            ['hello/app.php/x',      'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'],
+            ['hello/app.php/x?a=b',  'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'],
+            ['/hello/app.php/x?a=b', 'a=b', '/x', 'http://host:8080/hello/app.php/x?a=b', '/hello', '/hello/app.php'],
+        ];
     }
 
     /**
@@ -2235,16 +2235,16 @@ class RequestTest extends TestCase
             $expectedBaseUrl = $expectedBasePath;
         }
 
-        $server = array(
+        $server = [
             'HTTP_HOST' => 'host:8080',
             'SERVER_PORT' => '8080',
             'QUERY_STRING' => $queryString,
             'PHP_SELF' => '/hello/app.php',
             'SCRIPT_FILENAME' => '/some/path/app.php',
             'REQUEST_URI' => $requestUri,
-        );
+        ];
 
-        $request = new Request(array(), array(), array(), array(), array(), $server);
+        $request = new Request([], [], [], [], [], $server);
 
         $this->assertEquals($expectedPathInfo, $request->getPathInfo());
         $this->assertEquals($expectedUri, $request->getUri());
@@ -2257,7 +2257,7 @@ class RequestTest extends TestCase
 
     public function testTrustedHost()
     {
-        Request::setTrustedProxies(array('1.1.1.1'), -1);
+        Request::setTrustedProxies(['1.1.1.1'], -1);
 
         $request = Request::create('/');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
@@ -2279,7 +2279,7 @@ class RequestTest extends TestCase
 
     public function testTrustedPort()
     {
-        Request::setTrustedProxies(array('1.1.1.1'), -1);
+        Request::setTrustedProxies(['1.1.1.1'], -1);
 
         $request = Request::create('/');
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
@@ -2309,7 +2309,7 @@ class RequestContentProxy extends Request
 {
     public function getContent($asResource = false)
     {
-        return http_build_query(array('_method' => 'PUT', 'content' => 'mycontent'), '', '&');
+        return http_build_query(['_method' => 'PUT', 'content' => 'mycontent'], '', '&');
     }
 }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseFunctionalTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseFunctionalTest.php
index 22f25e978e..3d3e696c75 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseFunctionalTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseFunctionalTest.php
@@ -22,10 +22,10 @@ class ResponseFunctionalTest extends TestCase
 
     public static function setUpBeforeClass()
     {
-        $spec = array(
-            1 => array('file', '/dev/null', 'w'),
-            2 => array('file', '/dev/null', 'w'),
-        );
+        $spec = [
+            1 => ['file', '/dev/null', 'w'],
+            2 => ['file', '/dev/null', 'w'],
+        ];
         if (!self::$server = @proc_open('exec php -S localhost:8054', $spec, $pipes, __DIR__.'/Fixtures/response-functional')) {
             self::markTestSkipped('PHP server unable to start.');
         }
@@ -52,7 +52,7 @@ class ResponseFunctionalTest extends TestCase
     public function provideCookie()
     {
         foreach (glob(__DIR__.'/Fixtures/response-functional/*.php') as $file) {
-            yield array(pathinfo($file, PATHINFO_FILENAME));
+            yield [pathinfo($file, PATHINFO_FILENAME)];
         }
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
index f6ddb98ea7..35df36c1c6 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseHeaderBagTest.php
@@ -22,7 +22,7 @@ class ResponseHeaderBagTest extends TestCase
 {
     public function testAllPreserveCase()
     {
-        $headers = array(
+        $headers = [
             'fOo' => 'BAR',
             'ETag' => 'xyzzy',
             'Content-MD5' => 'Q2hlY2sgSW50ZWdyaXR5IQ==',
@@ -30,7 +30,7 @@ class ResponseHeaderBagTest extends TestCase
             'WWW-Authenticate' => 'Basic realm="WallyWorld"',
             'X-UA-Compatible' => 'IE=edge,chrome=1',
             'X-XSS-Protection' => '1; mode=block',
-        );
+        ];
 
         $bag = new ResponseHeaderBag($headers);
         $allPreservedCase = $bag->allPreserveCase();
@@ -42,45 +42,45 @@ class ResponseHeaderBagTest extends TestCase
 
     public function testCacheControlHeader()
     {
-        $bag = new ResponseHeaderBag(array());
+        $bag = new ResponseHeaderBag([]);
         $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('no-cache'));
 
-        $bag = new ResponseHeaderBag(array('Cache-Control' => 'public'));
+        $bag = new ResponseHeaderBag(['Cache-Control' => 'public']);
         $this->assertEquals('public', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('public'));
 
-        $bag = new ResponseHeaderBag(array('ETag' => 'abcde'));
+        $bag = new ResponseHeaderBag(['ETag' => 'abcde']);
         $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('private'));
         $this->assertTrue($bag->hasCacheControlDirective('must-revalidate'));
         $this->assertFalse($bag->hasCacheControlDirective('max-age'));
 
-        $bag = new ResponseHeaderBag(array('Expires' => 'Wed, 16 Feb 2011 14:17:43 GMT'));
+        $bag = new ResponseHeaderBag(['Expires' => 'Wed, 16 Feb 2011 14:17:43 GMT']);
         $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array(
+        $bag = new ResponseHeaderBag([
             'Expires' => 'Wed, 16 Feb 2011 14:17:43 GMT',
             'Cache-Control' => 'max-age=3600',
-        ));
+        ]);
         $this->assertEquals('max-age=3600, private', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('Last-Modified' => 'abcde'));
+        $bag = new ResponseHeaderBag(['Last-Modified' => 'abcde']);
         $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('Etag' => 'abcde', 'Last-Modified' => 'abcde'));
+        $bag = new ResponseHeaderBag(['Etag' => 'abcde', 'Last-Modified' => 'abcde']);
         $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('cache-control' => 'max-age=100'));
+        $bag = new ResponseHeaderBag(['cache-control' => 'max-age=100']);
         $this->assertEquals('max-age=100, private', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('cache-control' => 's-maxage=100'));
+        $bag = new ResponseHeaderBag(['cache-control' => 's-maxage=100']);
         $this->assertEquals('s-maxage=100', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('cache-control' => 'private, max-age=100'));
+        $bag = new ResponseHeaderBag(['cache-control' => 'private, max-age=100']);
         $this->assertEquals('max-age=100, private', $bag->get('Cache-Control'));
 
-        $bag = new ResponseHeaderBag(array('cache-control' => 'public, max-age=100'));
+        $bag = new ResponseHeaderBag(['cache-control' => 'public, max-age=100']);
         $this->assertEquals('max-age=100, public', $bag->get('Cache-Control'));
 
         $bag = new ResponseHeaderBag();
@@ -88,7 +88,7 @@ class ResponseHeaderBagTest extends TestCase
         $this->assertEquals('private, must-revalidate', $bag->get('Cache-Control'));
 
         $bag = new ResponseHeaderBag();
-        $bag->set('Cache-Control', array('public', 'must-revalidate'));
+        $bag->set('Cache-Control', ['public', 'must-revalidate']);
         $this->assertCount(1, $bag->get('Cache-Control', null, false));
         $this->assertEquals('must-revalidate, public', $bag->get('Cache-Control'));
 
@@ -101,7 +101,7 @@ class ResponseHeaderBagTest extends TestCase
 
     public function testCacheControlClone()
     {
-        $headers = array('foo' => 'bar');
+        $headers = ['foo' => 'bar'];
         $bag1 = new ResponseHeaderBag($headers);
         $bag2 = new ResponseHeaderBag($bag1->allPreserveCase());
         $this->assertEquals($bag1->allPreserveCase(), $bag2->allPreserveCase());
@@ -109,7 +109,7 @@ class ResponseHeaderBagTest extends TestCase
 
     public function testToStringIncludesCookieHeaders()
     {
-        $bag = new ResponseHeaderBag(array());
+        $bag = new ResponseHeaderBag([]);
         $bag->setCookie(Cookie::create('foo', 'bar'));
 
         $this->assertSetCookieHeader('foo=bar; path=/; httponly; samesite=lax', $bag);
@@ -121,7 +121,7 @@ class ResponseHeaderBagTest extends TestCase
 
     public function testClearCookieSecureNotHttpOnly()
     {
-        $bag = new ResponseHeaderBag(array());
+        $bag = new ResponseHeaderBag([]);
 
         $bag->clearCookie('foo', '/', null, true, false);
 
@@ -130,23 +130,23 @@ class ResponseHeaderBagTest extends TestCase
 
     public function testReplace()
     {
-        $bag = new ResponseHeaderBag(array());
+        $bag = new ResponseHeaderBag([]);
         $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('no-cache'));
 
-        $bag->replace(array('Cache-Control' => 'public'));
+        $bag->replace(['Cache-Control' => 'public']);
         $this->assertEquals('public', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('public'));
     }
 
     public function testReplaceWithRemove()
     {
-        $bag = new ResponseHeaderBag(array());
+        $bag = new ResponseHeaderBag([]);
         $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('no-cache'));
 
         $bag->remove('Cache-Control');
-        $bag->replace(array());
+        $bag->replace([]);
         $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
         $this->assertTrue($bag->hasCacheControlDirective('no-cache'));
     }
@@ -161,12 +161,12 @@ class ResponseHeaderBagTest extends TestCase
 
         $this->assertCount(4, $bag->getCookies());
         $this->assertEquals('foo=bar; path=/path/foo; domain=foo.bar; httponly; samesite=lax', $bag->get('set-cookie'));
-        $this->assertEquals(array(
+        $this->assertEquals([
             'foo=bar; path=/path/foo; domain=foo.bar; httponly; samesite=lax',
             'foo=bar; path=/path/bar; domain=foo.bar; httponly; samesite=lax',
             'foo=bar; path=/path/bar; domain=bar.foo; httponly; samesite=lax',
             'foo=bar; path=/; httponly; samesite=lax',
-        ), $bag->get('set-cookie', null, false));
+        ], $bag->get('set-cookie', null, false));
 
         $this->assertSetCookieHeader('foo=bar; path=/path/foo; domain=foo.bar; httponly; samesite=lax', $bag);
         $this->assertSetCookieHeader('foo=bar; path=/path/bar; domain=foo.bar; httponly; samesite=lax', $bag);
@@ -228,16 +228,16 @@ class ResponseHeaderBagTest extends TestCase
     {
         $bag = new ResponseHeaderBag();
         $bag->set('set-cookie', 'foo=bar');
-        $this->assertEquals(array(Cookie::create('foo', 'bar', 0, '/', null, false, false, true, null)), $bag->getCookies());
+        $this->assertEquals([Cookie::create('foo', 'bar', 0, '/', null, false, false, true, null)], $bag->getCookies());
 
         $bag->set('set-cookie', 'foo2=bar2', false);
-        $this->assertEquals(array(
+        $this->assertEquals([
             Cookie::create('foo', 'bar', 0, '/', null, false, false, true, null),
             Cookie::create('foo2', 'bar2', 0, '/', null, false, false, true, null),
-        ), $bag->getCookies());
+        ], $bag->getCookies());
 
         $bag->remove('set-cookie');
-        $this->assertEquals(array(), $bag->getCookies());
+        $this->assertEquals([], $bag->getCookies());
     }
 
     /**
@@ -260,8 +260,8 @@ class ResponseHeaderBagTest extends TestCase
         (string) $headers;
 
         $allHeaders = $headers->allPreserveCase();
-        $this->assertEquals(array('http://www.symfony.com'), $allHeaders['Location']);
-        $this->assertEquals(array('text/html'), $allHeaders['Content-type']);
+        $this->assertEquals(['http://www.symfony.com'], $allHeaders['Location']);
+        $this->assertEquals(['text/html'], $allHeaders['Content-type']);
     }
 
     public function testDateHeaderAddedOnCreation()
@@ -277,7 +277,7 @@ class ResponseHeaderBagTest extends TestCase
     public function testDateHeaderCanBeSetOnCreation()
     {
         $someDate = 'Thu, 23 Mar 2017 09:15:12 GMT';
-        $bag = new ResponseHeaderBag(array('Date' => $someDate));
+        $bag = new ResponseHeaderBag(['Date' => $someDate]);
 
         $this->assertEquals($someDate, $bag->get('Date'));
     }
@@ -285,7 +285,7 @@ class ResponseHeaderBagTest extends TestCase
     public function testDateHeaderWillBeRecreatedWhenRemoved()
     {
         $someDate = 'Thu, 23 Mar 2017 09:15:12 GMT';
-        $bag = new ResponseHeaderBag(array('Date' => $someDate));
+        $bag = new ResponseHeaderBag(['Date' => $someDate]);
         $bag->remove('Date');
 
         // a (new) Date header is still present
@@ -296,7 +296,7 @@ class ResponseHeaderBagTest extends TestCase
     public function testDateHeaderWillBeRecreatedWhenHeadersAreReplaced()
     {
         $bag = new ResponseHeaderBag();
-        $bag->replace(array());
+        $bag->replace([]);
 
         $this->assertTrue($bag->has('Date'));
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
index 03dcc11abd..adfae08b9e 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
@@ -22,7 +22,7 @@ class ResponseTest extends ResponseTestCase
 {
     public function testCreate()
     {
-        $response = Response::create('foo', 301, array('Foo' => 'bar'));
+        $response = Response::create('foo', 301, ['Foo' => 'bar']);
 
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\Response', $response);
         $this->assertEquals(301, $response->getStatusCode());
@@ -254,10 +254,10 @@ class ResponseTest extends ResponseTestCase
 
     public function testIsValidateable()
     {
-        $response = new Response('', 200, array('Last-Modified' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)));
+        $response = new Response('', 200, ['Last-Modified' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)]);
         $this->assertTrue($response->isValidateable(), '->isValidateable() returns true if Last-Modified is present');
 
-        $response = new Response('', 200, array('ETag' => '"12345"'));
+        $response = new Response('', 200, ['ETag' => '"12345"']);
         $this->assertTrue($response->isValidateable(), '->isValidateable() returns true if ETag is present');
 
         $response = new Response();
@@ -267,7 +267,7 @@ class ResponseTest extends ResponseTestCase
     public function testGetDate()
     {
         $oneHourAgo = $this->createDateTimeOneHourAgo();
-        $response = new Response('', 200, array('Date' => $oneHourAgo->format(DATE_RFC2822)));
+        $response = new Response('', 200, ['Date' => $oneHourAgo->format(DATE_RFC2822)]);
         $date = $response->getDate();
         $this->assertEquals($oneHourAgo->getTimestamp(), $date->getTimestamp(), '->getDate() returns the Date header if present');
 
@@ -275,7 +275,7 @@ class ResponseTest extends ResponseTestCase
         $date = $response->getDate();
         $this->assertEquals(time(), $date->getTimestamp(), '->getDate() returns the current Date if no Date header present');
 
-        $response = new Response('', 200, array('Date' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)));
+        $response = new Response('', 200, ['Date' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)]);
         $now = $this->createDateTimeNow();
         $response->headers->set('Date', $now->format(DATE_RFC2822));
         $date = $response->getDate();
@@ -415,21 +415,21 @@ class ResponseTest extends ResponseTestCase
     public function testGetVary()
     {
         $response = new Response();
-        $this->assertEquals(array(), $response->getVary(), '->getVary() returns an empty array if no Vary header is present');
+        $this->assertEquals([], $response->getVary(), '->getVary() returns an empty array if no Vary header is present');
 
         $response = new Response();
         $response->headers->set('Vary', 'Accept-Language');
-        $this->assertEquals(array('Accept-Language'), $response->getVary(), '->getVary() parses a single header name value');
+        $this->assertEquals(['Accept-Language'], $response->getVary(), '->getVary() parses a single header name value');
 
         $response = new Response();
         $response->headers->set('Vary', 'Accept-Language User-Agent    X-Foo');
-        $this->assertEquals(array('Accept-Language', 'User-Agent', 'X-Foo'), $response->getVary(), '->getVary() parses multiple header name values separated by spaces');
+        $this->assertEquals(['Accept-Language', 'User-Agent', 'X-Foo'], $response->getVary(), '->getVary() parses multiple header name values separated by spaces');
 
         $response = new Response();
         $response->headers->set('Vary', 'Accept-Language,User-Agent,    X-Foo');
-        $this->assertEquals(array('Accept-Language', 'User-Agent', 'X-Foo'), $response->getVary(), '->getVary() parses multiple header name values separated by commas');
+        $this->assertEquals(['Accept-Language', 'User-Agent', 'X-Foo'], $response->getVary(), '->getVary() parses multiple header name values separated by commas');
 
-        $vary = array('Accept-Language', 'User-Agent', 'X-foo');
+        $vary = ['Accept-Language', 'User-Agent', 'X-foo'];
 
         $response = new Response();
         $response->headers->set('Vary', $vary);
@@ -444,18 +444,18 @@ class ResponseTest extends ResponseTestCase
     {
         $response = new Response();
         $response->setVary('Accept-Language');
-        $this->assertEquals(array('Accept-Language'), $response->getVary());
+        $this->assertEquals(['Accept-Language'], $response->getVary());
 
         $response->setVary('Accept-Language, User-Agent');
-        $this->assertEquals(array('Accept-Language', 'User-Agent'), $response->getVary(), '->setVary() replace the vary header by default');
+        $this->assertEquals(['Accept-Language', 'User-Agent'], $response->getVary(), '->setVary() replace the vary header by default');
 
         $response->setVary('X-Foo', false);
-        $this->assertEquals(array('Accept-Language', 'User-Agent', 'X-Foo'), $response->getVary(), '->setVary() doesn\'t wipe out earlier Vary headers if replace is set to false');
+        $this->assertEquals(['Accept-Language', 'User-Agent', 'X-Foo'], $response->getVary(), '->setVary() doesn\'t wipe out earlier Vary headers if replace is set to false');
     }
 
     public function testDefaultContentType()
     {
-        $headerMock = $this->getMockBuilder('Symfony\Component\HttpFoundation\ResponseHeaderBag')->setMethods(array('set'))->getMock();
+        $headerMock = $this->getMockBuilder('Symfony\Component\HttpFoundation\ResponseHeaderBag')->setMethods(['set'])->getMock();
         $headerMock->expects($this->at(0))
             ->method('set')
             ->with('Content-Type', 'text/html');
@@ -595,55 +595,55 @@ class ResponseTest extends ResponseTestCase
     public function testSetCache()
     {
         $response = new Response();
-        //array('etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public')
+        // ['etag', 'last_modified', 'max_age', 's_maxage', 'private', 'public']
         try {
-            $response->setCache(array('wrong option' => 'value'));
+            $response->setCache(['wrong option' => 'value']);
             $this->fail('->setCache() throws an InvalidArgumentException if an option is not supported');
         } catch (\Exception $e) {
             $this->assertInstanceOf('InvalidArgumentException', $e, '->setCache() throws an InvalidArgumentException if an option is not supported');
             $this->assertContains('"wrong option"', $e->getMessage());
         }
 
-        $options = array('etag' => '"whatever"');
+        $options = ['etag' => '"whatever"'];
         $response->setCache($options);
         $this->assertEquals($response->getEtag(), '"whatever"');
 
         $now = $this->createDateTimeNow();
-        $options = array('last_modified' => $now);
+        $options = ['last_modified' => $now];
         $response->setCache($options);
         $this->assertEquals($response->getLastModified()->getTimestamp(), $now->getTimestamp());
 
-        $options = array('max_age' => 100);
+        $options = ['max_age' => 100];
         $response->setCache($options);
         $this->assertEquals($response->getMaxAge(), 100);
 
-        $options = array('s_maxage' => 200);
+        $options = ['s_maxage' => 200];
         $response->setCache($options);
         $this->assertEquals($response->getMaxAge(), 200);
 
         $this->assertTrue($response->headers->hasCacheControlDirective('public'));
         $this->assertFalse($response->headers->hasCacheControlDirective('private'));
 
-        $response->setCache(array('public' => true));
+        $response->setCache(['public' => true]);
         $this->assertTrue($response->headers->hasCacheControlDirective('public'));
         $this->assertFalse($response->headers->hasCacheControlDirective('private'));
 
-        $response->setCache(array('public' => false));
+        $response->setCache(['public' => false]);
         $this->assertFalse($response->headers->hasCacheControlDirective('public'));
         $this->assertTrue($response->headers->hasCacheControlDirective('private'));
 
-        $response->setCache(array('private' => true));
+        $response->setCache(['private' => true]);
         $this->assertFalse($response->headers->hasCacheControlDirective('public'));
         $this->assertTrue($response->headers->hasCacheControlDirective('private'));
 
-        $response->setCache(array('private' => false));
+        $response->setCache(['private' => false]);
         $this->assertTrue($response->headers->hasCacheControlDirective('public'));
         $this->assertFalse($response->headers->hasCacheControlDirective('private'));
 
-        $response->setCache(array('immutable' => true));
+        $response->setCache(['immutable' => true]);
         $this->assertTrue($response->headers->hasCacheControlDirective('immutable'));
 
-        $response->setCache(array('immutable' => false));
+        $response->setCache(['immutable' => false]);
         $this->assertFalse($response->headers->hasCacheControlDirective('immutable'));
     }
 
@@ -780,14 +780,14 @@ class ResponseTest extends ResponseTestCase
 
     public function getStatusCodeFixtures()
     {
-        return array(
-            array('200', null, 'OK'),
-            array('200', false, ''),
-            array('200', 'foo', 'foo'),
-            array('199', null, 'unknown status'),
-            array('199', false, ''),
-            array('199', 'foo', 'foo'),
-        );
+        return [
+            ['200', null, 'OK'],
+            ['200', false, ''],
+            ['200', 'foo', 'foo'],
+            ['199', null, 'unknown status'],
+            ['199', false, ''],
+            ['199', 'foo', 'foo'],
+        ];
     }
 
     public function testIsInformational()
@@ -801,7 +801,7 @@ class ResponseTest extends ResponseTestCase
 
     public function testIsRedirectRedirection()
     {
-        foreach (array(301, 302, 303, 307) as $code) {
+        foreach ([301, 302, 303, 307] as $code) {
             $response = new Response('', $code);
             $this->assertTrue($response->isRedirection());
             $this->assertTrue($response->isRedirect());
@@ -819,7 +819,7 @@ class ResponseTest extends ResponseTestCase
         $this->assertFalse($response->isRedirection());
         $this->assertFalse($response->isRedirect());
 
-        $response = new Response('', 301, array('Location' => '/good-uri'));
+        $response = new Response('', 301, ['Location' => '/good-uri']);
         $this->assertFalse($response->isRedirect('/bad-uri'));
         $this->assertTrue($response->isRedirect('/good-uri'));
     }
@@ -835,7 +835,7 @@ class ResponseTest extends ResponseTestCase
 
     public function testIsEmpty()
     {
-        foreach (array(204, 304) as $code) {
+        foreach ([204, 304] as $code) {
             $response = new Response('', $code);
             $this->assertTrue($response->isEmpty());
         }
@@ -884,7 +884,7 @@ class ResponseTest extends ResponseTestCase
 
     public function testSetEtag()
     {
-        $response = new Response('', 200, array('ETag' => '"12345"'));
+        $response = new Response('', 200, ['ETag' => '"12345"']);
         $response->setEtag();
 
         $this->assertNull($response->headers->get('Etag'), '->setEtag() removes Etags when call with null');
@@ -914,7 +914,7 @@ class ResponseTest extends ResponseTestCase
     {
         $response = new Response();
 
-        $setters = array(
+        $setters = [
             'setProtocolVersion' => '1.0',
             'setCharset' => 'UTF-8',
             'setPublic' => null,
@@ -925,7 +925,7 @@ class ResponseTest extends ResponseTestCase
             'setSharedMaxAge' => 1,
             'setTtl' => 1,
             'setClientTtl' => 1,
-        );
+        ];
 
         foreach ($setters as $setter => $arg) {
             $this->assertEquals($response, $response->{$setter}($arg));
@@ -944,20 +944,20 @@ class ResponseTest extends ResponseTestCase
 
     public function validContentProvider()
     {
-        return array(
-            'obj' => array(new StringableObject()),
-            'string' => array('Foo'),
-            'int' => array(2),
-        );
+        return [
+            'obj' => [new StringableObject()],
+            'string' => ['Foo'],
+            'int' => [2],
+        ];
     }
 
     public function invalidContentProvider()
     {
-        return array(
-            'obj' => array(new \stdClass()),
-            'array' => array(array()),
-            'bool' => array(true, '1'),
-        );
+        return [
+            'obj' => [new \stdClass()],
+            'array' => [[]],
+            'bool' => [true, '1'],
+        ];
     }
 
     protected function createDateTimeOneHourAgo()
@@ -1004,19 +1004,19 @@ class ResponseTest extends ResponseTestCase
 
         $ianaHttpStatusCodes = new \DOMDocument();
 
-        libxml_set_streams_context(stream_context_create(array(
-            'http' => array(
+        libxml_set_streams_context(stream_context_create([
+            'http' => [
                 'method' => 'GET',
                 'timeout' => 30,
-            ),
-        )));
+            ],
+        ]));
 
         $ianaHttpStatusCodes->load('https://www.iana.org/assignments/http-status-codes/http-status-codes.xml');
         if (!$ianaHttpStatusCodes->relaxNGValidate(__DIR__.'/schema/http-status-codes.rng')) {
             self::fail('Invalid IANA\'s HTTP status code list.');
         }
 
-        $ianaCodesReasonPhrases = array();
+        $ianaCodesReasonPhrases = [];
 
         $xpath = new \DOMXPath($ianaHttpStatusCodes);
         $xpath->registerNamespace('ns', 'http://www.iana.org/assignments');
@@ -1026,16 +1026,16 @@ class ResponseTest extends ResponseTestCase
             $value = $xpath->query('.//ns:value', $record)->item(0)->nodeValue;
             $description = $xpath->query('.//ns:description', $record)->item(0)->nodeValue;
 
-            if (\in_array($description, array('Unassigned', '(Unused)'), true)) {
+            if (\in_array($description, ['Unassigned', '(Unused)'], true)) {
                 continue;
             }
 
             if (preg_match('/^([0-9]+)\s*\-\s*([0-9]+)$/', $value, $matches)) {
                 for ($value = $matches[1]; $value <= $matches[2]; ++$value) {
-                    $ianaCodesReasonPhrases[] = array($value, $description);
+                    $ianaCodesReasonPhrases[] = [$value, $description];
                 }
             } else {
-                $ianaCodesReasonPhrases[] = array($value, $description);
+                $ianaCodesReasonPhrases[] = [$value, $description];
             }
         }
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
index f8becec5a9..0663b118e6 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ServerBagTest.php
@@ -23,7 +23,7 @@ class ServerBagTest extends TestCase
 {
     public function testShouldExtractHeadersFromServerArray()
     {
-        $server = array(
+        $server = [
             'SOME_SERVER_VARIABLE' => 'value',
             'SOME_SERVER_VARIABLE2' => 'value',
             'ROOT' => 'value',
@@ -32,45 +32,45 @@ class ServerBagTest extends TestCase
             'HTTP_ETAG' => 'asdf',
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => 'bar',
-        );
+        ];
 
         $bag = new ServerBag($server);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'CONTENT_TYPE' => 'text/html',
             'CONTENT_LENGTH' => '0',
             'ETAG' => 'asdf',
             'AUTHORIZATION' => 'Basic '.base64_encode('foo:bar'),
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => 'bar',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpPasswordIsOptional()
     {
-        $bag = new ServerBag(array('PHP_AUTH_USER' => 'foo'));
+        $bag = new ServerBag(['PHP_AUTH_USER' => 'foo']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => 'Basic '.base64_encode('foo:'),
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => '',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpBasicAuthWithPhpCgi()
     {
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => 'Basic '.base64_encode('foo:bar')));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => 'Basic '.base64_encode('foo:bar')]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => 'Basic '.base64_encode('foo:bar'),
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => 'bar',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpBasicAuthWithPhpCgiBogus()
     {
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => 'Basic_'.base64_encode('foo:bar')));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => 'Basic_'.base64_encode('foo:bar')]);
 
         // Username and passwords should not be set as the header is bogus
         $headers = $bag->getHeaders();
@@ -80,41 +80,41 @@ class ServerBagTest extends TestCase
 
     public function testHttpBasicAuthWithPhpCgiRedirect()
     {
-        $bag = new ServerBag(array('REDIRECT_HTTP_AUTHORIZATION' => 'Basic '.base64_encode('username:pass:word')));
+        $bag = new ServerBag(['REDIRECT_HTTP_AUTHORIZATION' => 'Basic '.base64_encode('username:pass:word')]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => 'Basic '.base64_encode('username:pass:word'),
             'PHP_AUTH_USER' => 'username',
             'PHP_AUTH_PW' => 'pass:word',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpBasicAuthWithPhpCgiEmptyPassword()
     {
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => 'Basic '.base64_encode('foo:')));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => 'Basic '.base64_encode('foo:')]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => 'Basic '.base64_encode('foo:'),
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => '',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpDigestAuthWithPhpCgi()
     {
         $digest = 'Digest username="foo", realm="acme", nonce="'.md5('secret').'", uri="/protected, qop="auth"';
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => $digest));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => $digest]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => $digest,
             'PHP_AUTH_DIGEST' => $digest,
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testHttpDigestAuthWithPhpCgiBogus()
     {
         $digest = 'Digest_username="foo", realm="acme", nonce="'.md5('secret').'", uri="/protected, qop="auth"';
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => $digest));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => $digest]);
 
         // Username and passwords should not be set as the header is bogus
         $headers = $bag->getHeaders();
@@ -125,32 +125,32 @@ class ServerBagTest extends TestCase
     public function testHttpDigestAuthWithPhpCgiRedirect()
     {
         $digest = 'Digest username="foo", realm="acme", nonce="'.md5('secret').'", uri="/protected, qop="auth"';
-        $bag = new ServerBag(array('REDIRECT_HTTP_AUTHORIZATION' => $digest));
+        $bag = new ServerBag(['REDIRECT_HTTP_AUTHORIZATION' => $digest]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => $digest,
             'PHP_AUTH_DIGEST' => $digest,
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testOAuthBearerAuth()
     {
         $headerContent = 'Bearer L-yLEOr9zhmUYRkzN1jwwxwQ-PBNiKDc8dgfB4hTfvo';
-        $bag = new ServerBag(array('HTTP_AUTHORIZATION' => $headerContent));
+        $bag = new ServerBag(['HTTP_AUTHORIZATION' => $headerContent]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => $headerContent,
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     public function testOAuthBearerAuthWithRedirect()
     {
         $headerContent = 'Bearer L-yLEOr9zhmUYRkzN1jwwxwQ-PBNiKDc8dgfB4hTfvo';
-        $bag = new ServerBag(array('REDIRECT_HTTP_AUTHORIZATION' => $headerContent));
+        $bag = new ServerBag(['REDIRECT_HTTP_AUTHORIZATION' => $headerContent]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => $headerContent,
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 
     /**
@@ -159,12 +159,12 @@ class ServerBagTest extends TestCase
     public function testItDoesNotOverwriteTheAuthorizationHeaderIfItIsAlreadySet()
     {
         $headerContent = 'Bearer L-yLEOr9zhmUYRkzN1jwwxwQ-PBNiKDc8dgfB4hTfvo';
-        $bag = new ServerBag(array('PHP_AUTH_USER' => 'foo', 'HTTP_AUTHORIZATION' => $headerContent));
+        $bag = new ServerBag(['PHP_AUTH_USER' => 'foo', 'HTTP_AUTHORIZATION' => $headerContent]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'AUTHORIZATION' => $headerContent,
             'PHP_AUTH_USER' => 'foo',
             'PHP_AUTH_PW' => '',
-        ), $bag->getHeaders());
+        ], $bag->getHeaders());
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
index 8c41e47510..44c8174e30 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/AttributeBagTest.php
@@ -21,7 +21,7 @@ use Symfony\Component\HttpFoundation\Session\Attribute\AttributeBag;
  */
 class AttributeBagTest extends TestCase
 {
-    private $array = array();
+    private $array = [];
 
     /**
      * @var AttributeBag
@@ -30,21 +30,21 @@ class AttributeBagTest extends TestCase
 
     protected function setUp()
     {
-        $this->array = array(
+        $this->array = [
             'hello' => 'world',
             'always' => 'be happy',
             'user.login' => 'drak',
-            'csrf.token' => array(
+            'csrf.token' => [
                 'a' => '1234',
                 'b' => '4321',
-            ),
-            'category' => array(
-                'fishing' => array(
+            ],
+            'category' => [
+                'fishing' => [
                     'first' => 'cod',
                     'second' => 'sole',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $this->bag = new AttributeBag('_sf');
         $this->bag->initialize($this->array);
     }
@@ -52,7 +52,7 @@ class AttributeBagTest extends TestCase
     protected function tearDown()
     {
         $this->bag = null;
-        $this->array = array();
+        $this->array = [];
     }
 
     public function testInitialize()
@@ -60,7 +60,7 @@ class AttributeBagTest extends TestCase
         $bag = new AttributeBag();
         $bag->initialize($this->array);
         $this->assertEquals($this->array, $bag->all());
-        $array = array('should' => 'change');
+        $array = ['should' => 'change'];
         $bag->initialize($array);
         $this->assertEquals($array, $bag->all());
     }
@@ -122,7 +122,7 @@ class AttributeBagTest extends TestCase
 
     public function testReplace()
     {
-        $array = array();
+        $array = [];
         $array['name'] = 'jack';
         $array['foo.bar'] = 'beep';
         $this->bag->replace($array);
@@ -150,22 +150,22 @@ class AttributeBagTest extends TestCase
     public function testClear()
     {
         $this->bag->clear();
-        $this->assertEquals(array(), $this->bag->all());
+        $this->assertEquals([], $this->bag->all());
     }
 
     public function attributesProvider()
     {
-        return array(
-            array('hello', 'world', true),
-            array('always', 'be happy', true),
-            array('user.login', 'drak', true),
-            array('csrf.token', array('a' => '1234', 'b' => '4321'), true),
-            array('category', array('fishing' => array('first' => 'cod', 'second' => 'sole')), true),
-            array('user2.login', null, false),
-            array('never', null, false),
-            array('bye', null, false),
-            array('bye/for/now', null, false),
-        );
+        return [
+            ['hello', 'world', true],
+            ['always', 'be happy', true],
+            ['user.login', 'drak', true],
+            ['csrf.token', ['a' => '1234', 'b' => '4321'], true],
+            ['category', ['fishing' => ['first' => 'cod', 'second' => 'sole']], true],
+            ['user2.login', null, false],
+            ['never', null, false],
+            ['bye', null, false],
+            ['bye/for/now', null, false],
+        ];
     }
 
     public function testGetIterator()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
index ec4cd5ad1a..6b4bb17d69 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Attribute/NamespacedAttributeBagTest.php
@@ -21,7 +21,7 @@ use Symfony\Component\HttpFoundation\Session\Attribute\NamespacedAttributeBag;
  */
 class NamespacedAttributeBagTest extends TestCase
 {
-    private $array = array();
+    private $array = [];
 
     /**
      * @var NamespacedAttributeBag
@@ -30,21 +30,21 @@ class NamespacedAttributeBagTest extends TestCase
 
     protected function setUp()
     {
-        $this->array = array(
+        $this->array = [
             'hello' => 'world',
             'always' => 'be happy',
             'user.login' => 'drak',
-            'csrf.token' => array(
+            'csrf.token' => [
                 'a' => '1234',
                 'b' => '4321',
-            ),
-            'category' => array(
-                'fishing' => array(
+            ],
+            'category' => [
+                'fishing' => [
                     'first' => 'cod',
                     'second' => 'sole',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
         $this->bag = new NamespacedAttributeBag('_sf2', '/');
         $this->bag->initialize($this->array);
     }
@@ -52,7 +52,7 @@ class NamespacedAttributeBagTest extends TestCase
     protected function tearDown()
     {
         $this->bag = null;
-        $this->array = array();
+        $this->array = [];
     }
 
     public function testInitialize()
@@ -60,7 +60,7 @@ class NamespacedAttributeBagTest extends TestCase
         $bag = new NamespacedAttributeBag();
         $bag->initialize($this->array);
         $this->assertEquals($this->array, $this->bag->all());
-        $array = array('should' => 'not stick');
+        $array = ['should' => 'not stick'];
         $bag->initialize($array);
 
         // should have remained the same
@@ -139,7 +139,7 @@ class NamespacedAttributeBagTest extends TestCase
 
     public function testReplace()
     {
-        $array = array();
+        $array = [];
         $array['name'] = 'jack';
         $array['foo.bar'] = 'beep';
         $this->bag->replace($array);
@@ -177,28 +177,28 @@ class NamespacedAttributeBagTest extends TestCase
     public function testClear()
     {
         $this->bag->clear();
-        $this->assertEquals(array(), $this->bag->all());
+        $this->assertEquals([], $this->bag->all());
     }
 
     public function attributesProvider()
     {
-        return array(
-            array('hello', 'world', true),
-            array('always', 'be happy', true),
-            array('user.login', 'drak', true),
-            array('csrf.token', array('a' => '1234', 'b' => '4321'), true),
-            array('csrf.token/a', '1234', true),
-            array('csrf.token/b', '4321', true),
-            array('category', array('fishing' => array('first' => 'cod', 'second' => 'sole')), true),
-            array('category/fishing', array('first' => 'cod', 'second' => 'sole'), true),
-            array('category/fishing/missing/first', null, false),
-            array('category/fishing/first', 'cod', true),
-            array('category/fishing/second', 'sole', true),
-            array('category/fishing/missing/second', null, false),
-            array('user2.login', null, false),
-            array('never', null, false),
-            array('bye', null, false),
-            array('bye/for/now', null, false),
-        );
+        return [
+            ['hello', 'world', true],
+            ['always', 'be happy', true],
+            ['user.login', 'drak', true],
+            ['csrf.token', ['a' => '1234', 'b' => '4321'], true],
+            ['csrf.token/a', '1234', true],
+            ['csrf.token/b', '4321', true],
+            ['category', ['fishing' => ['first' => 'cod', 'second' => 'sole']], true],
+            ['category/fishing', ['first' => 'cod', 'second' => 'sole'], true],
+            ['category/fishing/missing/first', null, false],
+            ['category/fishing/first', 'cod', true],
+            ['category/fishing/second', 'sole', true],
+            ['category/fishing/missing/second', null, false],
+            ['user2.login', null, false],
+            ['never', null, false],
+            ['bye', null, false],
+            ['bye/for/now', null, false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
index fa8626ab92..b4e2c3a5ad 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/AutoExpireFlashBagTest.php
@@ -26,13 +26,13 @@ class AutoExpireFlashBagTest extends TestCase
      */
     private $bag;
 
-    protected $array = array();
+    protected $array = [];
 
     protected function setUp()
     {
         parent::setUp();
         $this->bag = new FlashBag();
-        $this->array = array('new' => array('notice' => array('A previous flash message')));
+        $this->array = ['new' => ['notice' => ['A previous flash message']]];
         $this->bag->initialize($this->array);
     }
 
@@ -45,16 +45,16 @@ class AutoExpireFlashBagTest extends TestCase
     public function testInitialize()
     {
         $bag = new FlashBag();
-        $array = array('new' => array('notice' => array('A previous flash message')));
+        $array = ['new' => ['notice' => ['A previous flash message']]];
         $bag->initialize($array);
-        $this->assertEquals(array('A previous flash message'), $bag->peek('notice'));
-        $array = array('new' => array(
-                'notice' => array('Something else'),
-                'error' => array('a'),
-            ));
+        $this->assertEquals(['A previous flash message'], $bag->peek('notice'));
+        $array = ['new' => [
+                'notice' => ['Something else'],
+                'error' => ['a'],
+            ]];
         $bag->initialize($array);
-        $this->assertEquals(array('Something else'), $bag->peek('notice'));
-        $this->assertEquals(array('a'), $bag->peek('error'));
+        $this->assertEquals(['Something else'], $bag->peek('notice'));
+        $this->assertEquals(['a'], $bag->peek('error'));
     }
 
     public function testGetStorageKey()
@@ -73,16 +73,16 @@ class AutoExpireFlashBagTest extends TestCase
 
     public function testPeek()
     {
-        $this->assertEquals(array(), $this->bag->peek('non_existing'));
-        $this->assertEquals(array('default'), $this->bag->peek('non_existing', array('default')));
-        $this->assertEquals(array('A previous flash message'), $this->bag->peek('notice'));
-        $this->assertEquals(array('A previous flash message'), $this->bag->peek('notice'));
+        $this->assertEquals([], $this->bag->peek('non_existing'));
+        $this->assertEquals(['default'], $this->bag->peek('non_existing', ['default']));
+        $this->assertEquals(['A previous flash message'], $this->bag->peek('notice'));
+        $this->assertEquals(['A previous flash message'], $this->bag->peek('notice'));
     }
 
     public function testSet()
     {
         $this->bag->set('notice', 'Foo');
-        $this->assertEquals(array('A previous flash message'), $this->bag->peek('notice'));
+        $this->assertEquals(['A previous flash message'], $this->bag->peek('notice'));
     }
 
     public function testHas()
@@ -93,43 +93,43 @@ class AutoExpireFlashBagTest extends TestCase
 
     public function testKeys()
     {
-        $this->assertEquals(array('notice'), $this->bag->keys());
+        $this->assertEquals(['notice'], $this->bag->keys());
     }
 
     public function testPeekAll()
     {
-        $array = array(
-            'new' => array(
+        $array = [
+            'new' => [
                 'notice' => 'Foo',
                 'error' => 'Bar',
-            ),
-        );
+            ],
+        ];
 
         $this->bag->initialize($array);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'notice' => 'Foo',
             'error' => 'Bar',
-            ), $this->bag->peekAll()
+            ], $this->bag->peekAll()
         );
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'notice' => 'Foo',
             'error' => 'Bar',
-            ), $this->bag->peekAll()
+            ], $this->bag->peekAll()
         );
     }
 
     public function testGet()
     {
-        $this->assertEquals(array(), $this->bag->get('non_existing'));
-        $this->assertEquals(array('default'), $this->bag->get('non_existing', array('default')));
-        $this->assertEquals(array('A previous flash message'), $this->bag->get('notice'));
-        $this->assertEquals(array(), $this->bag->get('notice'));
+        $this->assertEquals([], $this->bag->get('non_existing'));
+        $this->assertEquals(['default'], $this->bag->get('non_existing', ['default']));
+        $this->assertEquals(['A previous flash message'], $this->bag->get('notice'));
+        $this->assertEquals([], $this->bag->get('notice'));
     }
 
     public function testSetAll()
     {
-        $this->bag->setAll(array('a' => 'first', 'b' => 'second'));
+        $this->bag->setAll(['a' => 'first', 'b' => 'second']);
         $this->assertFalse($this->bag->has('a'));
         $this->assertFalse($this->bag->has('b'));
     }
@@ -138,17 +138,17 @@ class AutoExpireFlashBagTest extends TestCase
     {
         $this->bag->set('notice', 'Foo');
         $this->bag->set('error', 'Bar');
-        $this->assertEquals(array(
-            'notice' => array('A previous flash message'),
-            ), $this->bag->all()
+        $this->assertEquals([
+            'notice' => ['A previous flash message'],
+            ], $this->bag->all()
         );
 
-        $this->assertEquals(array(), $this->bag->all());
+        $this->assertEquals([], $this->bag->all());
     }
 
     public function testClear()
     {
-        $this->assertEquals(array('notice' => array('A previous flash message')), $this->bag->clear());
+        $this->assertEquals(['notice' => ['A previous flash message']], $this->bag->clear());
     }
 
     public function testDoNotRemoveTheNewFlashesWhenDisplayingTheExistingOnes()
@@ -156,6 +156,6 @@ class AutoExpireFlashBagTest extends TestCase
         $this->bag->add('success', 'Something');
         $this->bag->all();
 
-        $this->assertEquals(array('new' => array('success' => array('Something')), 'display' => array()), $this->array);
+        $this->assertEquals(['new' => ['success' => ['Something']], 'display' => []], $this->array);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
index 905a1f7517..6d8619e078 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Flash/FlashBagTest.php
@@ -26,13 +26,13 @@ class FlashBagTest extends TestCase
      */
     private $bag;
 
-    protected $array = array();
+    protected $array = [];
 
     protected function setUp()
     {
         parent::setUp();
         $this->bag = new FlashBag();
-        $this->array = array('notice' => array('A previous flash message'));
+        $this->array = ['notice' => ['A previous flash message']];
         $this->bag->initialize($this->array);
     }
 
@@ -47,7 +47,7 @@ class FlashBagTest extends TestCase
         $bag = new FlashBag();
         $bag->initialize($this->array);
         $this->assertEquals($this->array, $bag->peekAll());
-        $array = array('should' => array('change'));
+        $array = ['should' => ['change']];
         $bag->initialize($array);
         $this->assertEquals($array, $bag->peekAll());
     }
@@ -68,49 +68,49 @@ class FlashBagTest extends TestCase
 
     public function testPeek()
     {
-        $this->assertEquals(array(), $this->bag->peek('non_existing'));
-        $this->assertEquals(array('default'), $this->bag->peek('not_existing', array('default')));
-        $this->assertEquals(array('A previous flash message'), $this->bag->peek('notice'));
-        $this->assertEquals(array('A previous flash message'), $this->bag->peek('notice'));
+        $this->assertEquals([], $this->bag->peek('non_existing'));
+        $this->assertEquals(['default'], $this->bag->peek('not_existing', ['default']));
+        $this->assertEquals(['A previous flash message'], $this->bag->peek('notice'));
+        $this->assertEquals(['A previous flash message'], $this->bag->peek('notice'));
     }
 
     public function testAdd()
     {
-        $tab = array('bar' => 'baz');
+        $tab = ['bar' => 'baz'];
         $this->bag->add('string_message', 'lorem');
         $this->bag->add('object_message', new \stdClass());
         $this->bag->add('array_message', $tab);
 
-        $this->assertEquals(array('lorem'), $this->bag->get('string_message'));
-        $this->assertEquals(array(new \stdClass()), $this->bag->get('object_message'));
-        $this->assertEquals(array($tab), $this->bag->get('array_message'));
+        $this->assertEquals(['lorem'], $this->bag->get('string_message'));
+        $this->assertEquals([new \stdClass()], $this->bag->get('object_message'));
+        $this->assertEquals([$tab], $this->bag->get('array_message'));
     }
 
     public function testGet()
     {
-        $this->assertEquals(array(), $this->bag->get('non_existing'));
-        $this->assertEquals(array('default'), $this->bag->get('not_existing', array('default')));
-        $this->assertEquals(array('A previous flash message'), $this->bag->get('notice'));
-        $this->assertEquals(array(), $this->bag->get('notice'));
+        $this->assertEquals([], $this->bag->get('non_existing'));
+        $this->assertEquals(['default'], $this->bag->get('not_existing', ['default']));
+        $this->assertEquals(['A previous flash message'], $this->bag->get('notice'));
+        $this->assertEquals([], $this->bag->get('notice'));
     }
 
     public function testAll()
     {
         $this->bag->set('notice', 'Foo');
         $this->bag->set('error', 'Bar');
-        $this->assertEquals(array(
-            'notice' => array('Foo'),
-            'error' => array('Bar'), ), $this->bag->all()
+        $this->assertEquals([
+            'notice' => ['Foo'],
+            'error' => ['Bar'], ], $this->bag->all()
         );
 
-        $this->assertEquals(array(), $this->bag->all());
+        $this->assertEquals([], $this->bag->all());
     }
 
     public function testSet()
     {
         $this->bag->set('notice', 'Foo');
         $this->bag->set('notice', 'Bar');
-        $this->assertEquals(array('Bar'), $this->bag->peek('notice'));
+        $this->assertEquals(['Bar'], $this->bag->peek('notice'));
     }
 
     public function testHas()
@@ -121,7 +121,7 @@ class FlashBagTest extends TestCase
 
     public function testKeys()
     {
-        $this->assertEquals(array('notice'), $this->bag->keys());
+        $this->assertEquals(['notice'], $this->bag->keys());
     }
 
     public function testSetAll()
@@ -130,28 +130,28 @@ class FlashBagTest extends TestCase
         $this->bag->add('another_flash', 'Bar');
         $this->assertTrue($this->bag->has('one_flash'));
         $this->assertTrue($this->bag->has('another_flash'));
-        $this->bag->setAll(array('unique_flash' => 'FooBar'));
+        $this->bag->setAll(['unique_flash' => 'FooBar']);
         $this->assertFalse($this->bag->has('one_flash'));
         $this->assertFalse($this->bag->has('another_flash'));
-        $this->assertSame(array('unique_flash' => 'FooBar'), $this->bag->all());
-        $this->assertSame(array(), $this->bag->all());
+        $this->assertSame(['unique_flash' => 'FooBar'], $this->bag->all());
+        $this->assertSame([], $this->bag->all());
     }
 
     public function testPeekAll()
     {
         $this->bag->set('notice', 'Foo');
         $this->bag->set('error', 'Bar');
-        $this->assertEquals(array(
-            'notice' => array('Foo'),
-            'error' => array('Bar'),
-            ), $this->bag->peekAll()
+        $this->assertEquals([
+            'notice' => ['Foo'],
+            'error' => ['Bar'],
+            ], $this->bag->peekAll()
         );
         $this->assertTrue($this->bag->has('notice'));
         $this->assertTrue($this->bag->has('error'));
-        $this->assertEquals(array(
-            'notice' => array('Foo'),
-            'error' => array('Bar'),
-            ), $this->bag->peekAll()
+        $this->assertEquals([
+            'notice' => ['Foo'],
+            'error' => ['Bar'],
+            ], $this->bag->peekAll()
         );
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
index 63351e575a..afa00fc7c3 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/SessionTest.php
@@ -127,10 +127,10 @@ class SessionTest extends TestCase
 
     public function testReplace()
     {
-        $this->session->replace(array('happiness' => 'be good', 'symfony' => 'awesome'));
-        $this->assertEquals(array('happiness' => 'be good', 'symfony' => 'awesome'), $this->session->all());
-        $this->session->replace(array());
-        $this->assertEquals(array(), $this->session->all());
+        $this->session->replace(['happiness' => 'be good', 'symfony' => 'awesome']);
+        $this->assertEquals(['happiness' => 'be good', 'symfony' => 'awesome'], $this->session->all());
+        $this->session->replace([]);
+        $this->assertEquals([], $this->session->all());
     }
 
     /**
@@ -150,16 +150,16 @@ class SessionTest extends TestCase
         $this->session->set('hi', 'fabien');
         $this->session->set($key, $value);
         $this->session->clear();
-        $this->assertEquals(array(), $this->session->all());
+        $this->assertEquals([], $this->session->all());
     }
 
     public function setProvider()
     {
-        return array(
-            array('foo', 'bar', array('foo' => 'bar')),
-            array('foo.bar', 'too much beer', array('foo.bar' => 'too much beer')),
-            array('great', 'symfony is great', array('great' => 'symfony is great')),
-        );
+        return [
+            ['foo', 'bar', ['foo' => 'bar']],
+            ['foo.bar', 'too much beer', ['foo.bar' => 'too much beer']],
+            ['great', 'symfony is great', ['great' => 'symfony is great']],
+        ];
     }
 
     /**
@@ -170,14 +170,14 @@ class SessionTest extends TestCase
         $this->session->set('hi.world', 'have a nice day');
         $this->session->set($key, $value);
         $this->session->remove($key);
-        $this->assertEquals(array('hi.world' => 'have a nice day'), $this->session->all());
+        $this->assertEquals(['hi.world' => 'have a nice day'], $this->session->all());
     }
 
     public function testInvalidate()
     {
         $this->session->set('invalidate', 123);
         $this->session->invalidate();
-        $this->assertEquals(array(), $this->session->all());
+        $this->assertEquals([], $this->session->all());
     }
 
     public function testMigrate()
@@ -216,7 +216,7 @@ class SessionTest extends TestCase
 
     public function testGetIterator()
     {
-        $attributes = array('hello' => 'world', 'symfony' => 'rocks');
+        $attributes = ['hello' => 'world', 'symfony' => 'rocks'];
         foreach ($attributes as $key => $val) {
             $this->session->set($key, $val);
         }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
index a2bf168de4..c0651498f2 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractRedisSessionHandlerTestCase.php
@@ -50,7 +50,7 @@ abstract class AbstractRedisSessionHandlerTestCase extends TestCase
         $this->redisClient = $this->createRedisClient($host);
         $this->storage = new RedisSessionHandler(
             $this->redisClient,
-            array('prefix' => self::PREFIX)
+            ['prefix' => self::PREFIX]
         );
     }
 
@@ -117,7 +117,7 @@ abstract class AbstractRedisSessionHandlerTestCase extends TestCase
         $lowTtl = 10;
 
         $this->redisClient->setex(self::PREFIX.'id', $lowTtl, 'foo');
-        $this->storage->updateTimestamp('id', array());
+        $this->storage->updateTimestamp('id', []);
 
         $this->assertGreaterThan($lowTtl, $this->redisClient->ttl(self::PREFIX.'id'));
     }
@@ -137,9 +137,9 @@ abstract class AbstractRedisSessionHandlerTestCase extends TestCase
 
     public function getOptionFixtures(): array
     {
-        return array(
-            array(array('prefix' => 'session'), true),
-            array(array('prefix' => 'sfs', 'foo' => 'bar'), false),
-        );
+        return [
+            [['prefix' => 'session'], true],
+            [['prefix' => 'sfs', 'foo' => 'bar'], false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractSessionHandlerTest.php
index 6566d6eee4..f65e62b506 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/AbstractSessionHandlerTest.php
@@ -19,10 +19,10 @@ class AbstractSessionHandlerTest extends TestCase
 
     public static function setUpBeforeClass()
     {
-        $spec = array(
-            1 => array('file', '/dev/null', 'w'),
-            2 => array('file', '/dev/null', 'w'),
-        );
+        $spec = [
+            1 => ['file', '/dev/null', 'w'],
+            2 => ['file', '/dev/null', 'w'],
+        ];
         if (!self::$server = @proc_open('exec php -S localhost:8053', $spec, $pipes, __DIR__.'/Fixtures')) {
             self::markTestSkipped('PHP server unable to start.');
         }
@@ -42,7 +42,7 @@ class AbstractSessionHandlerTest extends TestCase
      */
     public function testSession($fixture)
     {
-        $context = array('http' => array('header' => "Cookie: sid=123abc\r\n"));
+        $context = ['http' => ['header' => "Cookie: sid=123abc\r\n"]];
         $context = stream_context_create($context);
         $result = file_get_contents(sprintf('http://localhost:8053/%s.php', $fixture), false, $context);
 
@@ -52,7 +52,7 @@ class AbstractSessionHandlerTest extends TestCase
     public function provideSession()
     {
         foreach (glob(__DIR__.'/Fixtures/*.php') as $file) {
-            yield array(pathinfo($file, PATHINFO_FILENAME));
+            yield [pathinfo($file, PATHINFO_FILENAME)];
         }
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite.php
index 2d32792a8f..fc2c418289 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite.php
@@ -4,10 +4,10 @@ require __DIR__.'/common.inc';
 
 use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
 
-$storage = new NativeSessionStorage(array('cookie_samesite' => 'lax'));
+$storage = new NativeSessionStorage(['cookie_samesite' => 'lax']);
 $storage->setSaveHandler(new TestSessionHandler());
 $storage->start();
 
-$_SESSION = array('foo' => 'bar');
+$_SESSION = ['foo' => 'bar'];
 
 ob_start(function ($buffer) { return str_replace(session_id(), 'random_session_id', $buffer); });
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite_and_migration.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite_and_migration.php
index e0ff64b951..a28b6fedfc 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite_and_migration.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/Fixtures/with_samesite_and_migration.php
@@ -4,11 +4,11 @@ require __DIR__.'/common.inc';
 
 use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
 
-$storage = new NativeSessionStorage(array('cookie_samesite' => 'lax'));
+$storage = new NativeSessionStorage(['cookie_samesite' => 'lax']);
 $storage->setSaveHandler(new TestSessionHandler());
 $storage->start();
 
-$_SESSION = array('foo' => 'bar');
+$_SESSION = ['foo' => 'bar'];
 
 $storage->regenerate(true);
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
index 5bb2db0699..e150aae517 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MemcachedSessionHandlerTest.php
@@ -41,7 +41,7 @@ class MemcachedSessionHandlerTest extends TestCase
         $this->memcached = $this->getMockBuilder('Memcached')->getMock();
         $this->storage = new MemcachedSessionHandler(
             $this->memcached,
-            array('prefix' => self::PREFIX, 'expiretime' => self::TTL)
+            ['prefix' => self::PREFIX, 'expiretime' => self::TTL]
         );
     }
 
@@ -117,12 +117,12 @@ class MemcachedSessionHandlerTest extends TestCase
 
     public function getOptionFixtures()
     {
-        return array(
-            array(array('prefix' => 'session'), true),
-            array(array('expiretime' => 100), true),
-            array(array('prefix' => 'session', 'expiretime' => 200), true),
-            array(array('expiretime' => 100, 'foo' => 'bar'), false),
-        );
+        return [
+            [['prefix' => 'session'], true],
+            [['expiretime' => 100], true],
+            [['prefix' => 'session', 'expiretime' => 200], true],
+            [['expiretime' => 100, 'foo' => 'bar'], false],
+        ];
     }
 
     public function testGetConnection()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
index c585fd4f1b..891516d523 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/MongoDbSessionHandlerTest.php
@@ -40,14 +40,14 @@ class MongoDbSessionHandlerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $this->options = array(
+        $this->options = [
             'id_field' => '_id',
             'data_field' => 'data',
             'time_field' => 'time',
             'expiry_field' => 'expires_at',
             'database' => 'sf-test',
             'collection' => 'session-test',
-        );
+        ];
 
         $this->storage = new MongoDbSessionHandler($this->mongo, $this->options);
     }
@@ -57,7 +57,7 @@ class MongoDbSessionHandlerTest extends TestCase
      */
     public function testConstructorShouldThrowExceptionForMissingOptions()
     {
-        new MongoDbSessionHandler($this->mongo, array());
+        new MongoDbSessionHandler($this->mongo, []);
     }
 
     public function testOpenMethodAlwaysReturnTrue()
@@ -95,11 +95,11 @@ class MongoDbSessionHandlerTest extends TestCase
                 $this->assertInstanceOf(\MongoDB\BSON\UTCDateTime::class, $criteria[$this->options['expiry_field']]['$gte']);
                 $this->assertGreaterThanOrEqual(round((string) $criteria[$this->options['expiry_field']]['$gte'] / 1000), $testTimeout);
 
-                return array(
+                return [
                     $this->options['id_field'] => 'foo',
                     $this->options['expiry_field'] => new \MongoDB\BSON\UTCDateTime(),
                     $this->options['data_field'] => new \MongoDB\BSON\Binary('bar', \MongoDB\BSON\Binary::TYPE_OLD_BINARY),
-                );
+                ];
             }));
 
         $this->assertEquals('bar', $this->storage->read('foo'));
@@ -117,8 +117,8 @@ class MongoDbSessionHandlerTest extends TestCase
         $collection->expects($this->once())
             ->method('updateOne')
             ->will($this->returnCallback(function ($criteria, $updateData, $options) {
-                $this->assertEquals(array($this->options['id_field'] => 'foo'), $criteria);
-                $this->assertEquals(array('upsert' => true), $options);
+                $this->assertEquals([$this->options['id_field'] => 'foo'], $criteria);
+                $this->assertEquals(['upsert' => true], $options);
 
                 $data = $updateData['$set'];
                 $expectedExpiry = time() + (int) ini_get('session.gc_maxlifetime');
@@ -141,7 +141,7 @@ class MongoDbSessionHandlerTest extends TestCase
             ->with($this->options['database'], $this->options['collection'])
             ->will($this->returnValue($collection));
 
-        $data = array();
+        $data = [];
 
         $collection->expects($this->exactly(2))
             ->method('updateOne')
@@ -166,7 +166,7 @@ class MongoDbSessionHandlerTest extends TestCase
 
         $collection->expects($this->once())
             ->method('deleteOne')
-            ->with(array($this->options['id_field'] => 'foo'));
+            ->with([$this->options['id_field'] => 'foo']);
 
         $this->assertTrue($this->storage->destroy('foo'));
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
index 95e725f4bc..e227bebf62 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NativeFileSessionHandlerTest.php
@@ -27,7 +27,7 @@ class NativeFileSessionHandlerTest extends TestCase
 {
     public function testConstruct()
     {
-        $storage = new NativeSessionStorage(array('name' => 'TESTING'), new NativeFileSessionHandler(sys_get_temp_dir()));
+        $storage = new NativeSessionStorage(['name' => 'TESTING'], new NativeFileSessionHandler(sys_get_temp_dir()));
 
         $this->assertEquals('user', ini_get('session.save_handler'));
 
@@ -51,11 +51,11 @@ class NativeFileSessionHandlerTest extends TestCase
     {
         $base = sys_get_temp_dir();
 
-        return array(
-            array("$base/foo", "$base/foo", "$base/foo"),
-            array("5;$base/foo", "5;$base/foo", "$base/foo"),
-            array("5;0600;$base/foo", "5;0600;$base/foo", "$base/foo"),
-        );
+        return [
+            ["$base/foo", "$base/foo", "$base/foo"],
+            ["5;$base/foo", "5;$base/foo", "$base/foo"],
+            ["5;0600;$base/foo", "5;0600;$base/foo", "$base/foo"],
+        ];
     }
 
     /**
@@ -69,7 +69,7 @@ class NativeFileSessionHandlerTest extends TestCase
     public function testConstructDefault()
     {
         $path = ini_get('session.save_path');
-        $storage = new NativeSessionStorage(array('name' => 'TESTING'), new NativeFileSessionHandler());
+        $storage = new NativeSessionStorage(['name' => 'TESTING'], new NativeFileSessionHandler());
 
         $this->assertEquals($path, ini_get('session.save_path'));
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
index 9a2212b8b4..0d246e1aa5 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/NullSessionHandlerTest.php
@@ -54,6 +54,6 @@ class NullSessionHandlerTest extends TestCase
 
     public function getStorage()
     {
-        return new NativeSessionStorage(array(), new NullSessionHandler());
+        return new NativeSessionStorage([], new NullSessionHandler());
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
index 0edda00aa9..8aa84cff81 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PdoSessionHandlerTest.php
@@ -64,7 +64,7 @@ class PdoSessionHandlerTest extends TestCase
      */
     public function testInexistentTable()
     {
-        $storage = new PdoSessionHandler($this->getMemorySqlitePdo(), array('db_table' => 'inexistent_table'));
+        $storage = new PdoSessionHandler($this->getMemorySqlitePdo(), ['db_table' => 'inexistent_table']);
         $storage->open('', 'sid');
         $storage->read('id');
         $storage->write('id', 'data');
@@ -143,7 +143,7 @@ class PdoSessionHandlerTest extends TestCase
         $stream = $this->createStream($content);
 
         $pdo->prepareResult->expects($this->once())->method('fetchAll')
-            ->will($this->returnValue(array(array($stream, 42, time()))));
+            ->will($this->returnValue([[$stream, 42, time()]]));
 
         $storage = new PdoSessionHandler($pdo);
         $result = $storage->read('foo');
@@ -171,7 +171,7 @@ class PdoSessionHandlerTest extends TestCase
 
         $selectStmt->expects($this->atLeast(2))->method('fetchAll')
             ->will($this->returnCallback(function () use (&$exception, $stream) {
-                return $exception ? array(array($stream, 42, time())) : array();
+                return $exception ? [[$stream, 42, time()]] : [];
             }));
 
         $insertStmt->expects($this->once())->method('execute')
@@ -337,19 +337,19 @@ class PdoSessionHandlerTest extends TestCase
 
     public function provideUrlDsnPairs()
     {
-        yield array('mysql://localhost/test', 'mysql:host=localhost;dbname=test;');
-        yield array('mysql://localhost:56/test', 'mysql:host=localhost;port=56;dbname=test;');
-        yield array('mysql2://root:pwd@localhost/test', 'mysql:host=localhost;dbname=test;', 'root', 'pwd');
-        yield array('postgres://localhost/test', 'pgsql:host=localhost;dbname=test;');
-        yield array('postgresql://localhost:5634/test', 'pgsql:host=localhost;port=5634;dbname=test;');
-        yield array('postgres://root:pwd@localhost/test', 'pgsql:host=localhost;dbname=test;', 'root', 'pwd');
-        yield 'sqlite relative path' => array('sqlite://localhost/tmp/test', 'sqlite:tmp/test');
-        yield 'sqlite absolute path' => array('sqlite://localhost//tmp/test', 'sqlite:/tmp/test');
-        yield 'sqlite relative path without host' => array('sqlite:///tmp/test', 'sqlite:tmp/test');
-        yield 'sqlite absolute path without host' => array('sqlite3:////tmp/test', 'sqlite:/tmp/test');
-        yield array('sqlite://localhost/:memory:', 'sqlite::memory:');
-        yield array('mssql://localhost/test', 'sqlsrv:server=localhost;Database=test');
-        yield array('mssql://localhost:56/test', 'sqlsrv:server=localhost,56;Database=test');
+        yield ['mysql://localhost/test', 'mysql:host=localhost;dbname=test;'];
+        yield ['mysql://localhost:56/test', 'mysql:host=localhost;port=56;dbname=test;'];
+        yield ['mysql2://root:pwd@localhost/test', 'mysql:host=localhost;dbname=test;', 'root', 'pwd'];
+        yield ['postgres://localhost/test', 'pgsql:host=localhost;dbname=test;'];
+        yield ['postgresql://localhost:5634/test', 'pgsql:host=localhost;port=5634;dbname=test;'];
+        yield ['postgres://root:pwd@localhost/test', 'pgsql:host=localhost;dbname=test;', 'root', 'pwd'];
+        yield 'sqlite relative path' => ['sqlite://localhost/tmp/test', 'sqlite:tmp/test'];
+        yield 'sqlite absolute path' => ['sqlite://localhost//tmp/test', 'sqlite:/tmp/test'];
+        yield 'sqlite relative path without host' => ['sqlite:///tmp/test', 'sqlite:tmp/test'];
+        yield 'sqlite absolute path without host' => ['sqlite3:////tmp/test', 'sqlite:/tmp/test'];
+        yield ['sqlite://localhost/:memory:', 'sqlite::memory:'];
+        yield ['mssql://localhost/test', 'sqlsrv:server=localhost;Database=test'];
+        yield ['mssql://localhost:56/test', 'sqlsrv:server=localhost,56;Database=test'];
     }
 
     private function createStream($content)
@@ -387,7 +387,7 @@ class MockPdo extends \PDO
         return parent::getAttribute($attribute);
     }
 
-    public function prepare($statement, $driverOptions = array())
+    public function prepare($statement, $driverOptions = [])
     {
         return \is_callable($this->prepareResult)
             ? ($this->prepareResult)($statement, $driverOptions)
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisClusterSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisClusterSessionHandlerTest.php
index 458100101c..622b42da1a 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisClusterSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisClusterSessionHandlerTest.php
@@ -17,6 +17,6 @@ class PredisClusterSessionHandlerTest extends AbstractRedisSessionHandlerTestCas
 {
     protected function createRedisClient(string $host): Client
     {
-        return new Client(array(array('host' => $host)));
+        return new Client([['host' => $host]]);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisSessionHandlerTest.php
index a9db4eb1bf..5ecab116f7 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/PredisSessionHandlerTest.php
@@ -17,6 +17,6 @@ class PredisSessionHandlerTest extends AbstractRedisSessionHandlerTestCase
 {
     protected function createRedisClient(string $host): Client
     {
-        return new Client(array('host' => $host));
+        return new Client(['host' => $host]);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/RedisArraySessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/RedisArraySessionHandlerTest.php
index d263e18ff7..b03a37236f 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/RedisArraySessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/RedisArraySessionHandlerTest.php
@@ -15,6 +15,6 @@ class RedisArraySessionHandlerTest extends AbstractRedisSessionHandlerTestCase
 {
     protected function createRedisClient(string $host): \RedisArray
     {
-        return new \RedisArray(array($host));
+        return new \RedisArray([$host]);
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/StrictSessionHandlerTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/StrictSessionHandlerTest.php
index b02c41ae89..6a0d16876e 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/StrictSessionHandlerTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Handler/StrictSessionHandlerTest.php
@@ -84,7 +84,7 @@ class StrictSessionHandlerTest extends TestCase
     {
         $handler = $this->getMockBuilder('SessionHandlerInterface')->getMock();
         $handler->expects($this->exactly(2))->method('read')
-            ->withConsecutive(array('id1'), array('id2'))
+            ->withConsecutive(['id1'], ['id2'])
             ->will($this->onConsecutiveCalls('data1', 'data2'));
         $proxy = new StrictSessionHandler($handler);
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
index 69cf6163c1..2c4758b913 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MetadataBagTest.php
@@ -26,26 +26,26 @@ class MetadataBagTest extends TestCase
      */
     protected $bag;
 
-    protected $array = array();
+    protected $array = [];
 
     protected function setUp()
     {
         parent::setUp();
         $this->bag = new MetadataBag();
-        $this->array = array(MetadataBag::CREATED => 1234567, MetadataBag::UPDATED => 12345678, MetadataBag::LIFETIME => 0);
+        $this->array = [MetadataBag::CREATED => 1234567, MetadataBag::UPDATED => 12345678, MetadataBag::LIFETIME => 0];
         $this->bag->initialize($this->array);
     }
 
     protected function tearDown()
     {
-        $this->array = array();
+        $this->array = [];
         $this->bag = null;
         parent::tearDown();
     }
 
     public function testInitialize()
     {
-        $sessionMetadata = array();
+        $sessionMetadata = [];
 
         $bag1 = new MetadataBag();
         $bag1->initialize($sessionMetadata);
@@ -82,7 +82,7 @@ class MetadataBagTest extends TestCase
     public function testGetLifetime()
     {
         $bag = new MetadataBag();
-        $array = array(MetadataBag::CREATED => 1234567, MetadataBag::UPDATED => 12345678, MetadataBag::LIFETIME => 1000);
+        $array = [MetadataBag::CREATED => 1234567, MetadataBag::UPDATED => 12345678, MetadataBag::LIFETIME => 1000];
         $bag->initialize($array);
         $this->assertEquals(1000, $bag->getLifetime());
     }
@@ -111,11 +111,11 @@ class MetadataBagTest extends TestCase
         $timeStamp = time();
 
         $created = $timeStamp - 15;
-        $sessionMetadata = array(
+        $sessionMetadata = [
             MetadataBag::CREATED => $created,
             MetadataBag::UPDATED => $created,
             MetadataBag::LIFETIME => 1000,
-        );
+        ];
         $bag->initialize($sessionMetadata);
 
         $this->assertEquals($created, $sessionMetadata[MetadataBag::UPDATED]);
@@ -127,11 +127,11 @@ class MetadataBagTest extends TestCase
         $timeStamp = time();
 
         $created = $timeStamp - 45;
-        $sessionMetadata = array(
+        $sessionMetadata = [
             MetadataBag::CREATED => $created,
             MetadataBag::UPDATED => $created,
             MetadataBag::LIFETIME => 1000,
-        );
+        ];
         $bag->initialize($sessionMetadata);
 
         $this->assertEquals($timeStamp, $sessionMetadata[MetadataBag::UPDATED]);
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
index 893e120ce1..2e3024ef1b 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockArraySessionStorageTest.php
@@ -45,10 +45,10 @@ class MockArraySessionStorageTest extends TestCase
         $this->attributes = new AttributeBag();
         $this->flashes = new FlashBag();
 
-        $this->data = array(
-            $this->attributes->getStorageKey() => array('foo' => 'bar'),
-            $this->flashes->getStorageKey() => array('notice' => 'hello'),
-        );
+        $this->data = [
+            $this->attributes->getStorageKey() => ['foo' => 'bar'],
+            $this->flashes->getStorageKey() => ['notice' => 'hello'],
+        ];
 
         $this->storage = new MockArraySessionStorage();
         $this->storage->registerBag($this->flashes);
@@ -80,14 +80,14 @@ class MockArraySessionStorageTest extends TestCase
         $id = $this->storage->getId();
         $this->storage->regenerate();
         $this->assertNotEquals($id, $this->storage->getId());
-        $this->assertEquals(array('foo' => 'bar'), $this->storage->getBag('attributes')->all());
-        $this->assertEquals(array('notice' => 'hello'), $this->storage->getBag('flashes')->peekAll());
+        $this->assertEquals(['foo' => 'bar'], $this->storage->getBag('attributes')->all());
+        $this->assertEquals(['notice' => 'hello'], $this->storage->getBag('flashes')->peekAll());
 
         $id = $this->storage->getId();
         $this->storage->regenerate(true);
         $this->assertNotEquals($id, $this->storage->getId());
-        $this->assertEquals(array('foo' => 'bar'), $this->storage->getBag('attributes')->all());
-        $this->assertEquals(array('notice' => 'hello'), $this->storage->getBag('flashes')->peekAll());
+        $this->assertEquals(['foo' => 'bar'], $this->storage->getBag('attributes')->all());
+        $this->assertEquals(['notice' => 'hello'], $this->storage->getBag('flashes')->peekAll());
     }
 
     public function testGetId()
@@ -101,8 +101,8 @@ class MockArraySessionStorageTest extends TestCase
     {
         $this->storage->clear();
 
-        $this->assertSame(array(), $this->storage->getBag('attributes')->all());
-        $this->assertSame(array(), $this->storage->getBag('flashes')->peekAll());
+        $this->assertSame([], $this->storage->getBag('attributes')->all());
+        $this->assertSame([], $this->storage->getBag('flashes')->peekAll());
     }
 
     public function testClearStartsSession()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
index f8394d8cab..062769e282 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/MockFileSessionStorageTest.php
@@ -91,7 +91,7 @@ class MockFileSessionStorageTest extends TestCase
         $storage->start();
         $this->assertEquals('108', $storage->getBag('attributes')->get('new'));
         $this->assertTrue($storage->getBag('flashes')->has('newkey'));
-        $this->assertEquals(array('test'), $storage->getBag('flashes')->peek('newkey'));
+        $this->assertEquals(['test'], $storage->getBag('flashes')->peek('newkey'));
     }
 
     public function testMultipleInstances()
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
index 8ce703b34e..d97973e2eb 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
@@ -56,7 +56,7 @@ class NativeSessionStorageTest extends TestCase
     /**
      * @return NativeSessionStorage
      */
-    protected function getStorage(array $options = array())
+    protected function getStorage(array $options = [])
     {
         $storage = new NativeSessionStorage($options);
         $storage->registerBag(new AttributeBag());
@@ -157,19 +157,19 @@ class NativeSessionStorageTest extends TestCase
     {
         $this->iniSet('session.cache_limiter', 'nocache');
 
-        $storage = new NativeSessionStorage(array('cache_limiter' => 'public'));
+        $storage = new NativeSessionStorage(['cache_limiter' => 'public']);
         $this->assertEquals('public', ini_get('session.cache_limiter'));
     }
 
     public function testCookieOptions()
     {
-        $options = array(
+        $options = [
             'cookie_lifetime' => 123456,
             'cookie_path' => '/my/cookie/path',
             'cookie_domain' => 'symfony.example.com',
             'cookie_secure' => true,
             'cookie_httponly' => false,
-        );
+        ];
 
         if (\PHP_VERSION_ID >= 70300) {
             $options['cookie_samesite'] = 'lax';
@@ -177,7 +177,7 @@ class NativeSessionStorageTest extends TestCase
 
         $this->getStorage($options);
         $temp = session_get_cookie_params();
-        $gco = array();
+        $gco = [];
 
         foreach ($temp as $key => $value) {
             $gco['cookie_'.$key] = $value;
@@ -192,10 +192,10 @@ class NativeSessionStorageTest extends TestCase
             $this->markTestSkipped('HHVM is not handled in this test case.');
         }
 
-        $options = array(
+        $options = [
             'url_rewriter.tags' => 'a=href',
             'cache_expire' => '200',
-        );
+        ];
 
         $this->getStorage($options);
 
@@ -276,9 +276,9 @@ class NativeSessionStorageTest extends TestCase
     public function testSetSessionOptionsOnceSessionStartedIsIgnored()
     {
         session_start();
-        $this->getStorage(array(
+        $this->getStorage([
             'name' => 'something-else',
-        ));
+        ]);
 
         // Assert no exception has been thrown by `getStorage()`
         $this->addToAssertionCount(1);
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
index a5a8561465..4332400246 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/PhpBridgeSessionStorageTest.php
@@ -86,10 +86,10 @@ class PhpBridgeSessionStorageTest extends TestCase
         $_SESSION['drak'] = 'loves symfony';
         $storage->getBag('attributes')->set('symfony', 'greatness');
         $key = $storage->getBag('attributes')->getStorageKey();
-        $this->assertEquals($_SESSION[$key], array('symfony' => 'greatness'));
+        $this->assertEquals($_SESSION[$key], ['symfony' => 'greatness']);
         $this->assertEquals($_SESSION['drak'], 'loves symfony');
         $storage->clear();
-        $this->assertEquals($_SESSION[$key], array());
+        $this->assertEquals($_SESSION[$key], []);
         $this->assertEquals($_SESSION['drak'], 'loves symfony');
     }
 }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
index 0b48250e01..0459a8ce97 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/Proxy/SessionHandlerProxyTest.php
@@ -127,7 +127,7 @@ class SessionHandlerProxyTest extends TestCase
      */
     public function testValidateId()
     {
-        $mock = $this->getMockBuilder(array('SessionHandlerInterface', 'SessionUpdateTimestampHandlerInterface'))->getMock();
+        $mock = $this->getMockBuilder(['SessionHandlerInterface', 'SessionUpdateTimestampHandlerInterface'])->getMock();
         $mock->expects($this->once())
             ->method('validateId');
 
@@ -142,7 +142,7 @@ class SessionHandlerProxyTest extends TestCase
      */
     public function testUpdateTimestamp()
     {
-        $mock = $this->getMockBuilder(array('SessionHandlerInterface', 'SessionUpdateTimestampHandlerInterface'))->getMock();
+        $mock = $this->getMockBuilder(['SessionHandlerInterface', 'SessionUpdateTimestampHandlerInterface'])->getMock();
         $mock->expects($this->once())
             ->method('updateTimestamp');
 
diff --git a/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
index 699222e379..62dfc9bc94 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/StreamedResponseTest.php
@@ -19,7 +19,7 @@ class StreamedResponseTest extends TestCase
 {
     public function testConstructor()
     {
-        $response = new StreamedResponse(function () { echo 'foo'; }, 404, array('Content-Type' => 'text/plain'));
+        $response = new StreamedResponse(function () { echo 'foo'; }, 404, ['Content-Type' => 'text/plain']);
 
         $this->assertEquals(404, $response->getStatusCode());
         $this->assertEquals('text/plain', $response->headers->get('Content-Type'));
@@ -51,7 +51,7 @@ class StreamedResponseTest extends TestCase
 
     public function testPrepareWithHeadRequest()
     {
-        $response = new StreamedResponse(function () { echo 'foo'; }, 200, array('Content-Length' => '123'));
+        $response = new StreamedResponse(function () { echo 'foo'; }, 200, ['Content-Length' => '123']);
         $request = Request::create('/', 'HEAD');
 
         $response->prepare($request);
@@ -61,7 +61,7 @@ class StreamedResponseTest extends TestCase
 
     public function testPrepareWithCacheHeaders()
     {
-        $response = new StreamedResponse(function () { echo 'foo'; }, 200, array('Cache-Control' => 'max-age=600, public'));
+        $response = new StreamedResponse(function () { echo 'foo'; }, 200, ['Cache-Control' => 'max-age=600, public']);
         $request = Request::create('/', 'GET');
 
         $response->prepare($request);
diff --git a/src/Symfony/Component/HttpKernel/CacheClearer/ChainCacheClearer.php b/src/Symfony/Component/HttpKernel/CacheClearer/ChainCacheClearer.php
index a646119d99..5061a8d181 100644
--- a/src/Symfony/Component/HttpKernel/CacheClearer/ChainCacheClearer.php
+++ b/src/Symfony/Component/HttpKernel/CacheClearer/ChainCacheClearer.php
@@ -22,7 +22,7 @@ class ChainCacheClearer implements CacheClearerInterface
 {
     private $clearers;
 
-    public function __construct(iterable $clearers = array())
+    public function __construct(iterable $clearers = [])
     {
         $this->clearers = $clearers;
     }
diff --git a/src/Symfony/Component/HttpKernel/CacheClearer/Psr6CacheClearer.php b/src/Symfony/Component/HttpKernel/CacheClearer/Psr6CacheClearer.php
index d7db027072..47a6ece5c1 100644
--- a/src/Symfony/Component/HttpKernel/CacheClearer/Psr6CacheClearer.php
+++ b/src/Symfony/Component/HttpKernel/CacheClearer/Psr6CacheClearer.php
@@ -16,9 +16,9 @@ namespace Symfony\Component\HttpKernel\CacheClearer;
  */
 class Psr6CacheClearer implements CacheClearerInterface
 {
-    private $pools = array();
+    private $pools = [];
 
-    public function __construct(array $pools = array())
+    public function __construct(array $pools = [])
     {
         $this->pools = $pools;
     }
diff --git a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmerAggregate.php b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmerAggregate.php
index 171b38596f..dd527708be 100644
--- a/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmerAggregate.php
+++ b/src/Symfony/Component/HttpKernel/CacheWarmer/CacheWarmerAggregate.php
@@ -26,7 +26,7 @@ class CacheWarmerAggregate implements CacheWarmerInterface
     private $optionalsEnabled = false;
     private $onlyOptionalsEnabled = false;
 
-    public function __construct(iterable $warmers = array(), bool $debug = false, string $deprecationLogsFilepath = null)
+    public function __construct(iterable $warmers = [], bool $debug = false, string $deprecationLogsFilepath = null)
     {
         $this->warmers = $warmers;
         $this->debug = $debug;
@@ -51,7 +51,7 @@ class CacheWarmerAggregate implements CacheWarmerInterface
     public function warmUp($cacheDir)
     {
         if ($this->debug) {
-            $collectedLogs = array();
+            $collectedLogs = [];
             $previousHandler = \defined('PHPUNIT_COMPOSER_INSTALL');
             $previousHandler = $previousHandler ?: set_error_handler(function ($type, $message, $file, $line) use (&$collectedLogs, &$previousHandler) {
                 if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
@@ -73,14 +73,14 @@ class CacheWarmerAggregate implements CacheWarmerInterface
                     }
                 }
 
-                $collectedLogs[$message] = array(
+                $collectedLogs[$message] = [
                     'type' => $type,
                     'message' => $message,
                     'file' => $file,
                     'line' => $line,
                     'trace' => $backtrace,
                     'count' => 1,
-                );
+                ];
             });
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Client.php b/src/Symfony/Component/HttpKernel/Client.php
index 62555e9a5a..51b853c6e1 100644
--- a/src/Symfony/Component/HttpKernel/Client.php
+++ b/src/Symfony/Component/HttpKernel/Client.php
@@ -39,7 +39,7 @@ class Client extends BaseClient
      * @param History             $history   A History instance to store the browser history
      * @param CookieJar           $cookieJar A CookieJar instance to store the cookies
      */
-    public function __construct(HttpKernelInterface $kernel, array $server = array(), History $history = null, CookieJar $cookieJar = null)
+    public function __construct(HttpKernelInterface $kernel, array $server = [], History $history = null, CookieJar $cookieJar = null)
     {
         // These class properties must be set before calling the parent constructor, as it may depend on it.
         $this->kernel = $kernel;
@@ -159,7 +159,7 @@ EOF;
      */
     protected function filterFiles(array $files)
     {
-        $filtered = array();
+        $filtered = [];
         foreach ($files as $key => $value) {
             if (\is_array($value)) {
                 $filtered[$key] = $this->filterFiles($value);
diff --git a/src/Symfony/Component/HttpKernel/Config/FileLocator.php b/src/Symfony/Component/HttpKernel/Config/FileLocator.php
index 20d91b2f05..f88d1684fe 100644
--- a/src/Symfony/Component/HttpKernel/Config/FileLocator.php
+++ b/src/Symfony/Component/HttpKernel/Config/FileLocator.php
@@ -29,7 +29,7 @@ class FileLocator extends BaseFileLocator
      * @param string|null     $path   The path the global resource directory
      * @param array           $paths  An array of paths where to look for resources
      */
-    public function __construct(KernelInterface $kernel, string $path = null, array $paths = array())
+    public function __construct(KernelInterface $kernel, string $path = null, array $paths = [])
     {
         $this->kernel = $kernel;
         if (null !== $path) {
diff --git a/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver.php b/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver.php
index 142a6d54a6..86ceab2f26 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ArgumentResolver.php
@@ -34,7 +34,7 @@ final class ArgumentResolver implements ArgumentResolverInterface
      */
     private $argumentValueResolvers;
 
-    public function __construct(ArgumentMetadataFactoryInterface $argumentMetadataFactory = null, iterable $argumentValueResolvers = array())
+    public function __construct(ArgumentMetadataFactoryInterface $argumentMetadataFactory = null, iterable $argumentValueResolvers = [])
     {
         $this->argumentMetadataFactory = $argumentMetadataFactory ?: new ArgumentMetadataFactory();
         $this->argumentValueResolvers = $argumentValueResolvers ?: self::getDefaultArgumentValueResolvers();
@@ -45,7 +45,7 @@ final class ArgumentResolver implements ArgumentResolverInterface
      */
     public function getArguments(Request $request, $controller)
     {
-        $arguments = array();
+        $arguments = [];
 
         foreach ($this->argumentMetadataFactory->createArgumentMetadata($controller) as $metadata) {
             foreach ($this->argumentValueResolvers as $resolver) {
@@ -83,12 +83,12 @@ final class ArgumentResolver implements ArgumentResolverInterface
 
     public static function getDefaultArgumentValueResolvers(): iterable
     {
-        return array(
+        return [
             new RequestAttributeValueResolver(),
             new RequestValueResolver(),
             new SessionValueResolver(),
             new DefaultValueResolver(),
             new VariadicValueResolver(),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Controller/ControllerReference.php b/src/Symfony/Component/HttpKernel/Controller/ControllerReference.php
index f424fdc833..b4fdadd21e 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ControllerReference.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ControllerReference.php
@@ -27,15 +27,15 @@ use Symfony\Component\HttpKernel\Fragment\FragmentRendererInterface;
 class ControllerReference
 {
     public $controller;
-    public $attributes = array();
-    public $query = array();
+    public $attributes = [];
+    public $query = [];
 
     /**
      * @param string $controller The controller name
      * @param array  $attributes An array of parameters to add to the Request attributes
      * @param array  $query      An array of parameters to add to the Request query string
      */
-    public function __construct(string $controller, array $attributes = array(), array $query = array())
+    public function __construct(string $controller, array $attributes = [], array $query = [])
     {
         $this->controller = $controller;
         $this->attributes = $attributes;
diff --git a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
index 04c5fcf53d..3cebfb3e8b 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
@@ -107,7 +107,7 @@ class ControllerResolver implements ControllerResolverInterface
         list($class, $method) = explode('::', $controller, 2);
 
         try {
-            return array($this->instantiateController($class), $method);
+            return [$this->instantiateController($class), $method];
         } catch (\Error | \LogicException $e) {
             try {
                 if ((new \ReflectionMethod($class, $method))->isStatic()) {
@@ -155,7 +155,7 @@ class ControllerResolver implements ControllerResolverInterface
         }
 
         if (!isset($callable[0]) || !isset($callable[1]) || 2 !== \count($callable)) {
-            return 'Invalid array callable, expected array(controller, method).';
+            return 'Invalid array callable, expected [controller, method].';
         }
 
         list($controller, $method) = $callable;
@@ -172,7 +172,7 @@ class ControllerResolver implements ControllerResolverInterface
 
         $collection = $this->getClassMethodsWithoutMagicMethods($controller);
 
-        $alternatives = array();
+        $alternatives = [];
 
         foreach ($collection as $item) {
             $lev = levenshtein($method, $item);
diff --git a/src/Symfony/Component/HttpKernel/ControllerMetadata/ArgumentMetadataFactory.php b/src/Symfony/Component/HttpKernel/ControllerMetadata/ArgumentMetadataFactory.php
index cc2ed9f2b7..8ee9b0b938 100644
--- a/src/Symfony/Component/HttpKernel/ControllerMetadata/ArgumentMetadataFactory.php
+++ b/src/Symfony/Component/HttpKernel/ControllerMetadata/ArgumentMetadataFactory.php
@@ -23,7 +23,7 @@ final class ArgumentMetadataFactory implements ArgumentMetadataFactoryInterface
      */
     public function createArgumentMetadata($controller)
     {
-        $arguments = array();
+        $arguments = [];
 
         if (\is_array($controller)) {
             $reflection = new \ReflectionMethod($controller[0], $controller[1]);
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
index f07ac89c0f..c3c3f94ead 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/ConfigDataCollector.php
@@ -57,7 +57,7 @@ class ConfigDataCollector extends DataCollector implements LateDataCollectorInte
      */
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
-        $this->data = array(
+        $this->data = [
             'app_name' => $this->name,
             'app_version' => $this->version,
             'token' => $response->headers->get('X-Debug-Token'),
@@ -72,9 +72,9 @@ class ConfigDataCollector extends DataCollector implements LateDataCollectorInte
             'xdebug_enabled' => \extension_loaded('xdebug'),
             'apcu_enabled' => \extension_loaded('apcu') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN),
             'zend_opcache_enabled' => \extension_loaded('Zend OPcache') && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN),
-            'bundles' => array(),
+            'bundles' => [],
             'sapi_name' => \PHP_SAPI,
-        );
+        ];
 
         if (isset($this->kernel)) {
             foreach ($this->kernel->getBundles() as $name => $bundle) {
@@ -100,7 +100,7 @@ class ConfigDataCollector extends DataCollector implements LateDataCollectorInte
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
     }
 
     public function lateCollect()
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
index a3d8c99d84..77e36e253c 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DataCollector.php
@@ -27,7 +27,7 @@ use Symfony\Component\VarDumper\Cloner\VarCloner;
  */
 abstract class DataCollector implements DataCollectorInterface, \Serializable
 {
-    protected $data = array();
+    protected $data = [];
 
     /**
      * @var ClonerInterface
@@ -76,7 +76,7 @@ abstract class DataCollector implements DataCollectorInterface, \Serializable
      */
     protected function getCasters()
     {
-        return array(
+        return [
             '*' => function ($v, array $a, Stub $s, $isNested) {
                 if (!$v instanceof Stub) {
                     foreach ($a as $k => $v) {
@@ -88,6 +88,6 @@ abstract class DataCollector implements DataCollectorInterface, \Serializable
 
                 return $a;
             },
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index 051c3dd2cf..1df46ef28f 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -52,12 +52,12 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
         $this->dumper = $dumper;
 
         // All clones share these properties by reference:
-        $this->rootRefs = array(
+        $this->rootRefs = [
             &$this->data,
             &$this->dataCount,
             &$this->isCollected,
             &$this->clonesCount,
-        );
+        ];
 
         $this->sourceContextProvider = $dumper instanceof Connection && isset($dumper->getContextProviders()['source']) ? $dumper->getContextProviders()['source'] : new SourceContextProvider($this->charset);
     }
@@ -110,7 +110,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
         ) {
             if ($response->headers->has('Content-Type') && false !== strpos($response->headers->get('Content-Type'), 'html')) {
                 $dumper = new HtmlDumper('php://output', $this->charset);
-                $dumper->setDisplayOptions(array('fileLinkFormat' => $this->fileLinkFormat));
+                $dumper->setDisplayOptions(['fileLinkFormat' => $this->fileLinkFormat]);
             } else {
                 $dumper = new CliDumper('php://output', $this->charset);
                 if (method_exists($dumper, 'setDisplayOptions')) {
@@ -129,7 +129,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
         if ($this->stopwatch) {
             $this->stopwatch->reset();
         }
-        $this->data = array();
+        $this->data = [];
         $this->dataCount = 0;
         $this->isCollected = true;
         $this->clonesCount = 0;
@@ -145,7 +145,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
         $this->data[] = $this->fileLinkFormat;
         $this->data[] = $this->charset;
         $ser = serialize($this->data);
-        $this->data = array();
+        $this->data = [];
         $this->dataCount = 0;
         $this->isCollected = true;
 
@@ -172,11 +172,11 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
 
         if ('html' === $format) {
             $dumper = new HtmlDumper($data, $this->charset);
-            $dumper->setDisplayOptions(array('fileLinkFormat' => $this->fileLinkFormat));
+            $dumper->setDisplayOptions(['fileLinkFormat' => $this->fileLinkFormat]);
         } else {
             throw new \InvalidArgumentException(sprintf('Invalid dump format: %s', $format));
         }
-        $dumps = array();
+        $dumps = [];
 
         foreach ($this->data as $dump) {
             $dumper->dump($dump['data']->withMaxDepth($maxDepthLimit)->withMaxItemsPerDepth($maxItemsPerDepth));
@@ -210,12 +210,12 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
             if (isset($_SERVER['VAR_DUMPER_FORMAT'])) {
                 $html = 'html' === $_SERVER['VAR_DUMPER_FORMAT'];
             } else {
-                $html = !\in_array(\PHP_SAPI, array('cli', 'phpdbg'), true) && stripos($h[$i], 'html');
+                $html = !\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) && stripos($h[$i], 'html');
             }
 
             if ($html) {
                 $dumper = new HtmlDumper('php://output', $this->charset);
-                $dumper->setDisplayOptions(array('fileLinkFormat' => $this->fileLinkFormat));
+                $dumper->setDisplayOptions(['fileLinkFormat' => $this->fileLinkFormat]);
             } else {
                 $dumper = new CliDumper('php://output', $this->charset);
                 if (method_exists($dumper, 'setDisplayOptions')) {
@@ -228,7 +228,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
                 $this->doDump($dumper, $dump['data'], $dump['name'], $dump['file'], $dump['line']);
             }
 
-            $this->data = array();
+            $this->data = [];
             $this->dataCount = 0;
         }
     }
@@ -242,7 +242,7 @@ class DumpDataCollector extends DataCollector implements DataDumperInterface
                         $s = $this->style('meta', '%s');
                         $f = strip_tags($this->style('', $file));
                         $name = strip_tags($this->style('', $name));
-                        if ($fmt && $link = \is_string($fmt) ? strtr($fmt, array('%f' => $file, '%l' => $line)) : $fmt->format($file, $line)) {
+                        if ($fmt && $link = \is_string($fmt) ? strtr($fmt, ['%f' => $file, '%l' => $line]) : $fmt->format($file, $line)) {
                             $name = sprintf('<a href="%s" title="%s">'.$s.'</a>', strip_tags($this->style('', $link)), $f, $name);
                         } else {
                             $name = sprintf('<abbr title="%s">'.$s.'</abbr>', $f, $name);
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
index 3a7e51bf8d..c0de250940 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/EventDataCollector.php
@@ -37,16 +37,16 @@ class EventDataCollector extends DataCollector implements LateDataCollectorInter
      */
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
-        $this->data = array(
-            'called_listeners' => array(),
-            'not_called_listeners' => array(),
-            'orphaned_events' => array(),
-        );
+        $this->data = [
+            'called_listeners' => [],
+            'not_called_listeners' => [],
+            'orphaned_events' => [],
+        ];
     }
 
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
 
         if ($this->dispatcher instanceof ResetInterface) {
             $this->dispatcher->reset();
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/ExceptionDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/ExceptionDataCollector.php
index 7a25f14921..c76e7f45bd 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/ExceptionDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/ExceptionDataCollector.php
@@ -28,9 +28,9 @@ class ExceptionDataCollector extends DataCollector
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
         if (null !== $exception) {
-            $this->data = array(
+            $this->data = [
                 'exception' => FlattenException::create($exception),
-            );
+            ];
         }
     }
 
@@ -39,7 +39,7 @@ class ExceptionDataCollector extends DataCollector
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
index 310b2f91a5..7a6e1c0646 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/MemoryDataCollector.php
@@ -39,10 +39,10 @@ class MemoryDataCollector extends DataCollector implements LateDataCollectorInte
      */
     public function reset()
     {
-        $this->data = array(
+        $this->data = [
             'memory' => 0,
             'memory_limit' => $this->convertToBytes(ini_get('memory_limit')),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
index ed75382618..2df5f94fd4 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
@@ -38,7 +38,7 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
     public function collect(Request $request, Response $response, \Exception $exception = null)
     {
         // attributes are serialized and as they can be anything, they need to be converted to strings.
-        $attributes = array();
+        $attributes = [];
         $route = '';
         foreach ($request->attributes->all() as $key => $value) {
             if ('_route' === $key) {
@@ -57,10 +57,10 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
             $content = false;
         }
 
-        $sessionMetadata = array();
-        $sessionAttributes = array();
+        $sessionMetadata = [];
+        $sessionAttributes = [];
         $session = null;
-        $flashes = array();
+        $flashes = [];
         if ($request->hasSession()) {
             $session = $request->getSession();
             if ($session->isStarted()) {
@@ -74,19 +74,19 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
 
         $statusCode = $response->getStatusCode();
 
-        $responseCookies = array();
+        $responseCookies = [];
         foreach ($response->headers->getCookies() as $cookie) {
             $responseCookies[$cookie->getName()] = $cookie;
         }
 
-        $dotenvVars = array();
+        $dotenvVars = [];
         foreach (explode(',', getenv('SYMFONY_DOTENV_VARS')) as $name) {
             if ('' !== $name && false !== $value = getenv($name)) {
                 $dotenvVars[$name] = $value;
             }
         }
 
-        $this->data = array(
+        $this->data = [
             'method' => $request->getMethod(),
             'format' => $request->getRequestFormat(),
             'content' => $content,
@@ -110,7 +110,7 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
             'controller' => 'n/a',
             'locale' => $request->getLocale(),
             'dotenv_vars' => $dotenvVars,
-        );
+        ];
 
         if (isset($this->data['request_headers']['php-auth-pw'])) {
             $this->data['request_headers']['php-auth-pw'] = '******';
@@ -147,14 +147,14 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
         if ($response->isRedirect()) {
             $response->headers->setCookie(new Cookie(
                 'sf_redirect',
-                json_encode(array(
+                json_encode([
                     'token' => $response->headers->get('x-debug-token'),
                     'route' => $request->attributes->get('_route', 'n/a'),
                     'method' => $request->getMethod(),
                     'controller' => $this->parseController($request->attributes->get('_controller')),
                     'status_code' => $statusCode,
                     'status_text' => Response::$statusTexts[(int) $statusCode],
-                )),
+                ]),
                 0, '/', null, $request->isSecure(), true, false, 'lax'
             ));
         }
@@ -173,7 +173,7 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
 
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
         $this->controllers = new \SplObjectStorage();
     }
 
@@ -308,7 +308,7 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
      */
     public function getRouteParams()
     {
-        return isset($this->data['request_attributes']['_route_params']) ? $this->data['request_attributes']['_route_params']->getValue() : array();
+        return isset($this->data['request_attributes']['_route_params']) ? $this->data['request_attributes']['_route_params']->getValue() : [];
     }
 
     /**
@@ -356,10 +356,10 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             KernelEvents::CONTROLLER => 'onKernelController',
             KernelEvents::RESPONSE => 'onKernelResponse',
-        );
+        ];
     }
 
     /**
@@ -387,21 +387,21 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
             try {
                 $r = new \ReflectionMethod($controller[0], $controller[1]);
 
-                return array(
+                return [
                     'class' => \is_object($controller[0]) ? \get_class($controller[0]) : $controller[0],
                     'method' => $controller[1],
                     'file' => $r->getFileName(),
                     'line' => $r->getStartLine(),
-                );
+                ];
             } catch (\ReflectionException $e) {
                 if (\is_callable($controller)) {
                     // using __call or  __callStatic
-                    return array(
+                    return [
                         'class' => \is_object($controller[0]) ? \get_class($controller[0]) : $controller[0],
                         'method' => $controller[1],
                         'file' => 'n/a',
                         'line' => 'n/a',
-                    );
+                    ];
                 }
             }
         }
@@ -409,12 +409,12 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
         if ($controller instanceof \Closure) {
             $r = new \ReflectionFunction($controller);
 
-            $controller = array(
+            $controller = [
                 'class' => $r->getName(),
                 'method' => null,
                 'file' => $r->getFileName(),
                 'line' => $r->getStartLine(),
-            );
+            ];
 
             if (false !== strpos($r->name, '{closure}')) {
                 return $controller;
@@ -433,12 +433,12 @@ class RequestDataCollector extends DataCollector implements EventSubscriberInter
         if (\is_object($controller)) {
             $r = new \ReflectionClass($controller);
 
-            return array(
+            return [
                 'class' => $r->getName(),
                 'method' => null,
                 'file' => $r->getFileName(),
                 'line' => $r->getStartLine(),
-            );
+            ];
         }
 
         return \is_string($controller) ? $controller : 'n/a';
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/RouterDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/RouterDataCollector.php
index 481747b3c8..432dc3618f 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/RouterDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/RouterDataCollector.php
@@ -54,11 +54,11 @@ class RouterDataCollector extends DataCollector
     {
         $this->controllers = new \SplObjectStorage();
 
-        $this->data = array(
+        $this->data = [
             'redirect' => false,
             'url' => null,
             'route' => null,
-        );
+        ];
     }
 
     protected function guessRoute(Request $request, $controller)
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/TimeDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/TimeDataCollector.php
index e489d77598..99149ab0be 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/TimeDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/TimeDataCollector.php
@@ -43,11 +43,11 @@ class TimeDataCollector extends DataCollector implements LateDataCollectorInterf
             $startTime = $request->server->get('REQUEST_TIME_FLOAT');
         }
 
-        $this->data = array(
+        $this->data = [
             'token' => $response->headers->get('X-Debug-Token'),
             'start_time' => $startTime * 1000,
-            'events' => array(),
-        );
+            'events' => [],
+        ];
     }
 
     /**
@@ -55,7 +55,7 @@ class TimeDataCollector extends DataCollector implements LateDataCollectorInterf
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
 
         if (null !== $this->stopwatch) {
             $this->stopwatch->reset();
diff --git a/src/Symfony/Component/HttpKernel/Debug/FileLinkFormatter.php b/src/Symfony/Component/HttpKernel/Debug/FileLinkFormatter.php
index 221d33473e..f6a2b9dc7a 100644
--- a/src/Symfony/Component/HttpKernel/Debug/FileLinkFormatter.php
+++ b/src/Symfony/Component/HttpKernel/Debug/FileLinkFormatter.php
@@ -36,7 +36,7 @@ class FileLinkFormatter implements \Serializable
         $fileLinkFormat = $fileLinkFormat ?: ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format');
         if ($fileLinkFormat && !\is_array($fileLinkFormat)) {
             $i = strpos($f = $fileLinkFormat, '&', max(strrpos($f, '%f'), strrpos($f, '%l'))) ?: \strlen($f);
-            $fileLinkFormat = array(substr($f, 0, $i)) + preg_split('/&([^>]++)>/', substr($f, $i), -1, PREG_SPLIT_DELIM_CAPTURE);
+            $fileLinkFormat = [substr($f, 0, $i)] + preg_split('/&([^>]++)>/', substr($f, $i), -1, PREG_SPLIT_DELIM_CAPTURE);
         }
 
         $this->fileLinkFormat = $fileLinkFormat;
@@ -55,7 +55,7 @@ class FileLinkFormatter implements \Serializable
                 }
             }
 
-            return strtr($fmt[0], array('%f' => $file, '%l' => $line));
+            return strtr($fmt[0], ['%f' => $file, '%l' => $line]);
         }
 
         return false;
@@ -68,7 +68,7 @@ class FileLinkFormatter implements \Serializable
 
     public function unserialize($serialized)
     {
-        $this->fileLinkFormat = unserialize($serialized, array('allowed_classes' => false));
+        $this->fileLinkFormat = unserialize($serialized, ['allowed_classes' => false]);
     }
 
     /**
@@ -95,10 +95,10 @@ class FileLinkFormatter implements \Serializable
                     return;
                 }
 
-                return array(
+                return [
                     $request->getSchemeAndHttpHost().$request->getBasePath().$this->urlFormat,
                     $this->baseDir.\DIRECTORY_SEPARATOR, '',
-                );
+                ];
             }
         }
     }
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/AddAnnotatedClassesToCachePass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/AddAnnotatedClassesToCachePass.php
index 783e6fbbe6..2659d34de6 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/AddAnnotatedClassesToCachePass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/AddAnnotatedClassesToCachePass.php
@@ -59,7 +59,7 @@ class AddAnnotatedClassesToCachePass implements CompilerPassInterface
      */
     private function expandClasses(array $patterns, array $classes)
     {
-        $expanded = array();
+        $expanded = [];
 
         // Explicit classes declared in the patterns are returned directly
         foreach ($patterns as $key => $pattern) {
@@ -85,7 +85,7 @@ class AddAnnotatedClassesToCachePass implements CompilerPassInterface
 
     private function getClassesInComposerClassMaps()
     {
-        $classes = array();
+        $classes = [];
 
         foreach (spl_autoload_functions() as $function) {
             if (!\is_array($function)) {
@@ -106,14 +106,14 @@ class AddAnnotatedClassesToCachePass implements CompilerPassInterface
 
     private function patternsToRegexps($patterns)
     {
-        $regexps = array();
+        $regexps = [];
 
         foreach ($patterns as $pattern) {
             // Escape user input
             $regex = preg_quote(ltrim($pattern, '\\'));
 
             // Wildcards * and **
-            $regex = strtr($regex, array('\\*\\*' => '.*?', '\\*' => '[^\\\\]*?'));
+            $regex = strtr($regex, ['\\*\\*' => '.*?', '\\*' => '[^\\\\]*?']);
 
             // If this class does not end by a slash, anchor the end
             if ('\\' !== substr($regex, -1)) {
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/ControllerArgumentValueResolverPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/ControllerArgumentValueResolverPass.php
index 77c0e479ae..705c88dbfa 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/ControllerArgumentValueResolverPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/ControllerArgumentValueResolverPass.php
@@ -52,7 +52,7 @@ class ControllerArgumentValueResolverPass implements CompilerPassInterface
                 $id = (string) $resolverReference;
                 $container->register("debug.$id", TraceableValueResolver::class)
                     ->setDecoratedService($id)
-                    ->setArguments(array(new Reference("debug.$id.inner"), new Reference($this->traceableResolverStopwatch)));
+                    ->setArguments([new Reference("debug.$id.inner"), new Reference($this->traceableResolverStopwatch)]);
             }
         }
 
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/Extension.php b/src/Symfony/Component/HttpKernel/DependencyInjection/Extension.php
index 647875554b..db376e6d9f 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/Extension.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/Extension.php
@@ -20,7 +20,7 @@ use Symfony\Component\DependencyInjection\Extension\Extension as BaseExtension;
  */
 abstract class Extension extends BaseExtension
 {
-    private $annotatedClasses = array();
+    private $annotatedClasses = [];
 
     /**
      * Gets the annotated classes to cache.
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/FragmentRendererPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/FragmentRendererPass.php
index 2a8c1b1b11..432f767202 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/FragmentRendererPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/FragmentRendererPass.php
@@ -41,7 +41,7 @@ class FragmentRendererPass implements CompilerPassInterface
         }
 
         $definition = $container->getDefinition($this->handlerService);
-        $renderers = array();
+        $renderers = [];
         foreach ($container->findTaggedServiceIds($this->rendererTag, true) as $id => $tags) {
             $def = $container->getDefinition($id);
             $class = $container->getParameterBag()->resolveValue($def->getClass());
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php b/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
index 4bb47902b5..526c11faac 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/LazyLoadingFragmentHandler.php
@@ -23,19 +23,19 @@ use Symfony\Component\HttpKernel\Fragment\FragmentHandler;
 class LazyLoadingFragmentHandler extends FragmentHandler
 {
     private $container;
-    private $initialized = array();
+    private $initialized = [];
 
     public function __construct(ContainerInterface $container, RequestStack $requestStack, bool $debug = false)
     {
         $this->container = $container;
 
-        parent::__construct($requestStack, array(), $debug);
+        parent::__construct($requestStack, [], $debug);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function render($uri, $renderer = 'inline', array $options = array())
+    public function render($uri, $renderer = 'inline', array $options = [])
     {
         if (!isset($this->initialized[$renderer]) && $this->container->has($renderer)) {
             $this->addRenderer($this->container->get($renderer));
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
index 1dbf7f7bee..83e1b758de 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/MergeExtensionConfigurationPass.php
@@ -32,7 +32,7 @@ class MergeExtensionConfigurationPass extends BaseMergeExtensionConfigurationPas
     {
         foreach ($this->extensions as $extension) {
             if (!\count($container->getExtensionConfig($extension))) {
-                $container->loadFromExtension($extension, array());
+                $container->loadFromExtension($extension, []);
             }
         }
 
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/RegisterControllerArgumentLocatorsPass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/RegisterControllerArgumentLocatorsPass.php
index 125464b123..64d5e02473 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/RegisterControllerArgumentLocatorsPass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/RegisterControllerArgumentLocatorsPass.php
@@ -49,7 +49,7 @@ class RegisterControllerArgumentLocatorsPass implements CompilerPassInterface
         }
 
         $parameterBag = $container->getParameterBag();
-        $controllers = array();
+        $controllers = [];
 
         foreach ($container->findTaggedServiceIds($this->controllerTag, true) as $id => $tags) {
             $def = $container->getDefinition($id);
@@ -72,14 +72,14 @@ class RegisterControllerArgumentLocatorsPass implements CompilerPassInterface
             $isContainerAware = $r->implementsInterface(ContainerAwareInterface::class) || is_subclass_of($class, AbstractController::class);
 
             // get regular public methods
-            $methods = array();
-            $arguments = array();
+            $methods = [];
+            $arguments = [];
             foreach ($r->getMethods(\ReflectionMethod::IS_PUBLIC) as $r) {
                 if ('setContainer' === $r->name && $isContainerAware) {
                     continue;
                 }
                 if (!$r->isConstructor() && !$r->isDestructor() && !$r->isAbstract()) {
-                    $methods[strtolower($r->name)] = array($r, $r->getParameters());
+                    $methods[strtolower($r->name)] = [$r, $r->getParameters()];
                 }
             }
 
@@ -89,7 +89,7 @@ class RegisterControllerArgumentLocatorsPass implements CompilerPassInterface
                     $autowire = true;
                     continue;
                 }
-                foreach (array('action', 'argument', 'id') as $k) {
+                foreach (['action', 'argument', 'id'] as $k) {
                     if (!isset($attributes[$k][0])) {
                         throw new InvalidArgumentException(sprintf('Missing "%s" attribute on tag "%s" %s for service "%s".', $k, $this->controllerTag, json_encode($attributes, JSON_UNESCAPED_UNICODE), $id));
                     }
@@ -119,7 +119,7 @@ class RegisterControllerArgumentLocatorsPass implements CompilerPassInterface
                 /** @var \ReflectionMethod $r */
 
                 // create a per-method map of argument-names to service/type-references
-                $args = array();
+                $args = [];
                 foreach ($parameters as $p) {
                     /** @var \ReflectionParameter $p */
                     $type = ltrim($target = ProxyHelper::getTypeHint($r, $p), '\\');
@@ -138,13 +138,13 @@ class RegisterControllerArgumentLocatorsPass implements CompilerPassInterface
                         $binding = $bindings[$bindingName];
 
                         list($bindingValue, $bindingId) = $binding->getValues();
-                        $binding->setValues(array($bindingValue, $bindingId, true));
+                        $binding->setValues([$bindingValue, $bindingId, true]);
 
                         if (!$bindingValue instanceof Reference) {
                             $args[$p->name] = new Reference('.value.'.$container->hash($bindingValue));
                             $container->register((string) $args[$p->name], 'mixed')
                                 ->setFactory('current')
-                                ->addArgument(array($bindingValue));
+                                ->addArgument([$bindingValue]);
                         } else {
                             $args[$p->name] = $bindingValue;
                         }
diff --git a/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php b/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
index 564f879ca7..c1199f639e 100644
--- a/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
+++ b/src/Symfony/Component/HttpKernel/DependencyInjection/ResettableServicePass.php
@@ -39,7 +39,7 @@ class ResettableServicePass implements CompilerPassInterface
             return;
         }
 
-        $services = $methods = array();
+        $services = $methods = [];
 
         foreach ($container->findTaggedServiceIds($this->tagName, true) as $id => $tags) {
             $services[$id] = new Reference($id, ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE);
diff --git a/src/Symfony/Component/HttpKernel/EventListener/AbstractSessionListener.php b/src/Symfony/Component/HttpKernel/EventListener/AbstractSessionListener.php
index c7c1717069..80d57e506a 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/AbstractSessionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/AbstractSessionListener.php
@@ -38,7 +38,7 @@ abstract class AbstractSessionListener implements EventSubscriberInterface
     const NO_AUTO_CACHE_CONTROL_HEADER = 'Symfony-Session-NoAutoCacheControl';
 
     protected $container;
-    private $sessionUsageStack = array();
+    private $sessionUsageStack = [];
 
     public function __construct(ContainerInterface $container = null)
     {
@@ -131,12 +131,12 @@ abstract class AbstractSessionListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array('onKernelRequest', 128),
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 128],
             // low priority to come after regular response listeners, but higher than StreamedResponseListener
-            KernelEvents::RESPONSE => array('onKernelResponse', -1000),
-            KernelEvents::FINISH_REQUEST => array('onFinishRequest'),
-        );
+            KernelEvents::RESPONSE => ['onKernelResponse', -1000],
+            KernelEvents::FINISH_REQUEST => ['onFinishRequest'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/EventListener/AbstractTestSessionListener.php b/src/Symfony/Component/HttpKernel/EventListener/AbstractTestSessionListener.php
index 993c6ddf97..58b3580024 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/AbstractTestSessionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/AbstractTestSessionListener.php
@@ -32,7 +32,7 @@ abstract class AbstractTestSessionListener implements EventSubscriberInterface
     private $sessionId;
     private $sessionOptions;
 
-    public function __construct(array $sessionOptions = array())
+    public function __construct(array $sessionOptions = [])
     {
         $this->sessionOptions = $sessionOptions;
     }
@@ -78,7 +78,7 @@ abstract class AbstractTestSessionListener implements EventSubscriberInterface
         }
 
         if ($session instanceof Session ? !$session->isEmpty() || (null !== $this->sessionId && $session->getId() !== $this->sessionId) : $wasStarted) {
-            $params = session_get_cookie_params() + array('samesite' => null);
+            $params = session_get_cookie_params() + ['samesite' => null];
             foreach ($this->sessionOptions as $k => $v) {
                 if (0 === strpos($k, 'cookie_')) {
                     $params[substr($k, 7)] = $v;
@@ -98,10 +98,10 @@ abstract class AbstractTestSessionListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array('onKernelRequest', 192),
-            KernelEvents::RESPONSE => array('onKernelResponse', -128),
-        );
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 192],
+            KernelEvents::RESPONSE => ['onKernelResponse', -128],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
index 47fe05c5e1..529375a5dd 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/DebugHandlersListener.php
@@ -145,10 +145,10 @@ class DebugHandlersListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        $events = array(KernelEvents::REQUEST => array('configure', 2048));
+        $events = [KernelEvents::REQUEST => ['configure', 2048]];
 
         if ('cli' === \PHP_SAPI && \defined('Symfony\Component\Console\ConsoleEvents::COMMAND')) {
-            $events[ConsoleEvents::COMMAND] = array('configure', 2048);
+            $events[ConsoleEvents::COMMAND] = ['configure', 2048];
         }
 
         return $events;
diff --git a/src/Symfony/Component/HttpKernel/EventListener/DumpListener.php b/src/Symfony/Component/HttpKernel/EventListener/DumpListener.php
index 3acbe7d46c..30908a4f45 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/DumpListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/DumpListener.php
@@ -54,10 +54,10 @@ class DumpListener implements EventSubscriberInterface
     public static function getSubscribedEvents()
     {
         if (!class_exists(ConsoleEvents::class)) {
-            return array();
+            return [];
         }
 
         // Register early to have a working dump() as early as possible
-        return array(ConsoleEvents::COMMAND => array('configure', 1024));
+        return [ConsoleEvents::COMMAND => ['configure', 1024]];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
index 02b1d4ddc3..dd00797f5f 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ExceptionListener.php
@@ -112,12 +112,12 @@ class ExceptionListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::EXCEPTION => array(
-                array('logKernelException', 0),
-                array('onKernelException', -128),
-            ),
-        );
+        return [
+            KernelEvents::EXCEPTION => [
+                ['logKernelException', 0],
+                ['onKernelException', -128],
+            ],
+        ];
     }
 
     /**
@@ -130,9 +130,9 @@ class ExceptionListener implements EventSubscriberInterface
     {
         if (null !== $this->logger) {
             if (!$exception instanceof HttpExceptionInterface || $exception->getStatusCode() >= 500) {
-                $this->logger->critical($message, array('exception' => $exception));
+                $this->logger->critical($message, ['exception' => $exception]);
             } else {
-                $this->logger->error($message, array('exception' => $exception));
+                $this->logger->error($message, ['exception' => $exception]);
             }
         }
     }
@@ -147,7 +147,7 @@ class ExceptionListener implements EventSubscriberInterface
      */
     protected function duplicateRequest(\Exception $exception, Request $request)
     {
-        $attributes = array(
+        $attributes = [
             'exception' => $exception = FlattenException::create($exception),
             '_controller' => $this->controller ?: function () use ($exception) {
                 $handler = new ExceptionHandler($this->debug, $this->charset, $this->fileLinkFormat);
@@ -155,7 +155,7 @@ class ExceptionListener implements EventSubscriberInterface
                 return new Response($handler->getHtml($exception), $exception->getStatusCode(), $exception->getHeaders());
             },
             'logger' => $this->logger instanceof DebugLoggerInterface ? $this->logger : null,
-        );
+        ];
         $request = $request->duplicate(null, null, $attributes);
         $request->setMethod('GET');
 
diff --git a/src/Symfony/Component/HttpKernel/EventListener/FragmentListener.php b/src/Symfony/Component/HttpKernel/EventListener/FragmentListener.php
index b47aa7cca0..5a789a3eb9 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/FragmentListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/FragmentListener.php
@@ -70,7 +70,7 @@ class FragmentListener implements EventSubscriberInterface
 
         parse_str($request->query->get('_path', ''), $attributes);
         $request->attributes->add($attributes);
-        $request->attributes->set('_route_params', array_replace($request->attributes->get('_route_params', array()), $attributes));
+        $request->attributes->set('_route_params', array_replace($request->attributes->get('_route_params', []), $attributes));
         $request->query->remove('_path');
     }
 
@@ -92,8 +92,8 @@ class FragmentListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array(array('onKernelRequest', 48)),
-        );
+        return [
+            KernelEvents::REQUEST => [['onKernelRequest', 48]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php b/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
index 03344be7a6..df0e5cf8a6 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php
@@ -119,10 +119,10 @@ class ProfilerListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::RESPONSE => array('onKernelResponse', -100),
-            KernelEvents::EXCEPTION => array('onKernelException', 0),
-            KernelEvents::TERMINATE => array('onKernelTerminate', -1024),
-        );
+        return [
+            KernelEvents::RESPONSE => ['onKernelResponse', -100],
+            KernelEvents::EXCEPTION => ['onKernelException', 0],
+            KernelEvents::TERMINATE => ['onKernelTerminate', -1024],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ResponseListener.php b/src/Symfony/Component/HttpKernel/EventListener/ResponseListener.php
index 0550c0230e..331694b176 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ResponseListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ResponseListener.php
@@ -49,8 +49,8 @@ class ResponseListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             KernelEvents::RESPONSE => 'onKernelResponse',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php b/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
index 3919284564..3098657760 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/RouterListener.php
@@ -118,12 +118,12 @@ class RouterListener implements EventSubscriberInterface
             }
 
             if (null !== $this->logger) {
-                $this->logger->info('Matched route "{route}".', array(
+                $this->logger->info('Matched route "{route}".', [
                     'route' => isset($parameters['_route']) ? $parameters['_route'] : 'n/a',
                     'route_parameters' => $parameters,
                     'request_uri' => $request->getUri(),
                     'method' => $request->getMethod(),
-                ));
+                ]);
             }
 
             $request->attributes->add($parameters);
@@ -157,11 +157,11 @@ class RouterListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array(array('onKernelRequest', 32)),
-            KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
-            KernelEvents::EXCEPTION => array('onKernelException', -64),
-        );
+        return [
+            KernelEvents::REQUEST => [['onKernelRequest', 32]],
+            KernelEvents::FINISH_REQUEST => [['onKernelFinishRequest', 0]],
+            KernelEvents::EXCEPTION => ['onKernelException', -64],
+        ];
     }
 
     private function createWelcomeResponse()
diff --git a/src/Symfony/Component/HttpKernel/EventListener/SaveSessionListener.php b/src/Symfony/Component/HttpKernel/EventListener/SaveSessionListener.php
index 99382ea3cc..b14153ad3c 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/SaveSessionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/SaveSessionListener.php
@@ -38,9 +38,9 @@ class SaveSessionListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             // low priority but higher than StreamedResponseListener
-            KernelEvents::RESPONSE => array(array('onKernelResponse', -1000)),
-        );
+            KernelEvents::RESPONSE => [['onKernelResponse', -1000]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/SessionListener.php b/src/Symfony/Component/HttpKernel/EventListener/SessionListener.php
index 75624b6c5c..aaf3be507f 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/SessionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/SessionListener.php
@@ -42,7 +42,7 @@ class SessionListener extends AbstractSessionListener
             && ($storage = $this->container->get('session_storage')) instanceof NativeSessionStorage
             && $this->container->get('request_stack')->getMasterRequest()->isSecure()
         ) {
-            $storage->setOptions(array('cookie_secure' => true));
+            $storage->setOptions(['cookie_secure' => true]);
         }
 
         return $this->container->get('session');
diff --git a/src/Symfony/Component/HttpKernel/EventListener/StreamedResponseListener.php b/src/Symfony/Component/HttpKernel/EventListener/StreamedResponseListener.php
index 2c616b9182..895176a931 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/StreamedResponseListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/StreamedResponseListener.php
@@ -42,8 +42,8 @@ class StreamedResponseListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::RESPONSE => array('onKernelResponse', -1024),
-        );
+        return [
+            KernelEvents::RESPONSE => ['onKernelResponse', -1024],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/SurrogateListener.php b/src/Symfony/Component/HttpKernel/EventListener/SurrogateListener.php
index 6343533857..0fddddde42 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/SurrogateListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/SurrogateListener.php
@@ -58,8 +58,8 @@ class SurrogateListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             KernelEvents::RESPONSE => 'onKernelResponse',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/EventListener/TestSessionListener.php b/src/Symfony/Component/HttpKernel/EventListener/TestSessionListener.php
index 23589a2bb3..46323ae2a8 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/TestSessionListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/TestSessionListener.php
@@ -24,7 +24,7 @@ class TestSessionListener extends AbstractTestSessionListener
 {
     private $container;
 
-    public function __construct(ContainerInterface $container, array $sessionOptions = array())
+    public function __construct(ContainerInterface $container, array $sessionOptions = [])
     {
         $this->container = $container;
         parent::__construct($sessionOptions);
diff --git a/src/Symfony/Component/HttpKernel/EventListener/TranslatorListener.php b/src/Symfony/Component/HttpKernel/EventListener/TranslatorListener.php
index e0b344e4a8..361b11fcec 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/TranslatorListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/TranslatorListener.php
@@ -58,11 +58,11 @@ class TranslatorListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
+        return [
             // must be registered after the Locale listener
-            KernelEvents::REQUEST => array(array('onKernelRequest', 10)),
-            KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
-        );
+            KernelEvents::REQUEST => [['onKernelRequest', 10]],
+            KernelEvents::FINISH_REQUEST => [['onKernelFinishRequest', 0]],
+        ];
     }
 
     private function setLocale(Request $request)
diff --git a/src/Symfony/Component/HttpKernel/EventListener/ValidateRequestListener.php b/src/Symfony/Component/HttpKernel/EventListener/ValidateRequestListener.php
index a33853f727..2e921869b9 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/ValidateRequestListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/ValidateRequestListener.php
@@ -44,10 +44,10 @@ class ValidateRequestListener implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array(
-                array('onKernelRequest', 256),
-            ),
-        );
+        return [
+            KernelEvents::REQUEST => [
+                ['onKernelRequest', 256],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Exception/AccessDeniedHttpException.php b/src/Symfony/Component/HttpKernel/Exception/AccessDeniedHttpException.php
index 3aedbf97fe..f6f4ff53f0 100644
--- a/src/Symfony/Component/HttpKernel/Exception/AccessDeniedHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/AccessDeniedHttpException.php
@@ -23,7 +23,7 @@ class AccessDeniedHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(403, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/BadRequestHttpException.php b/src/Symfony/Component/HttpKernel/Exception/BadRequestHttpException.php
index ff215db45f..4b25adcba3 100644
--- a/src/Symfony/Component/HttpKernel/Exception/BadRequestHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/BadRequestHttpException.php
@@ -22,7 +22,7 @@ class BadRequestHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(400, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/ConflictHttpException.php b/src/Symfony/Component/HttpKernel/Exception/ConflictHttpException.php
index 60195daf7b..6c8a1b3c53 100644
--- a/src/Symfony/Component/HttpKernel/Exception/ConflictHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/ConflictHttpException.php
@@ -22,7 +22,7 @@ class ConflictHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(409, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/ControllerDoesNotReturnResponseException.php b/src/Symfony/Component/HttpKernel/Exception/ControllerDoesNotReturnResponseException.php
index 39149aa5b7..517313db60 100644
--- a/src/Symfony/Component/HttpKernel/Exception/ControllerDoesNotReturnResponseException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/ControllerDoesNotReturnResponseException.php
@@ -28,12 +28,12 @@ class ControllerDoesNotReturnResponseException extends \LogicException
         $this->line = $controllerDefinition['line'];
         $r = new \ReflectionProperty(\Exception::class, 'trace');
         $r->setAccessible(true);
-        $r->setValue($this, array_merge(array(
-            array(
+        $r->setValue($this, array_merge([
+            [
                 'line' => $line,
                 'file' => $file,
-            ),
-        ), $this->getTrace()));
+            ],
+        ], $this->getTrace()));
     }
 
     private function parseControllerDefinition(callable $controller): ?array
@@ -46,10 +46,10 @@ class ControllerDoesNotReturnResponseException extends \LogicException
             try {
                 $r = new \ReflectionMethod($controller[0], $controller[1]);
 
-                return array(
+                return [
                     'file' => $r->getFileName(),
                     'line' => $r->getEndLine(),
-                );
+                ];
             } catch (\ReflectionException $e) {
                 return null;
             }
@@ -58,19 +58,19 @@ class ControllerDoesNotReturnResponseException extends \LogicException
         if ($controller instanceof \Closure) {
             $r = new \ReflectionFunction($controller);
 
-            return array(
+            return [
                 'file' => $r->getFileName(),
                 'line' => $r->getEndLine(),
-            );
+            ];
         }
 
         if (\is_object($controller)) {
             $r = new \ReflectionClass($controller);
 
-            return array(
+            return [
                 'file' => $r->getFileName(),
                 'line' => $r->getEndLine(),
-            );
+            ];
         }
 
         return null;
diff --git a/src/Symfony/Component/HttpKernel/Exception/GoneHttpException.php b/src/Symfony/Component/HttpKernel/Exception/GoneHttpException.php
index f2f3515f77..de0d5f2c2c 100644
--- a/src/Symfony/Component/HttpKernel/Exception/GoneHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/GoneHttpException.php
@@ -22,7 +22,7 @@ class GoneHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(410, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/HttpException.php b/src/Symfony/Component/HttpKernel/Exception/HttpException.php
index dab73120d0..3acb52ac35 100644
--- a/src/Symfony/Component/HttpKernel/Exception/HttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/HttpException.php
@@ -21,7 +21,7 @@ class HttpException extends \RuntimeException implements HttpExceptionInterface
     private $statusCode;
     private $headers;
 
-    public function __construct(int $statusCode, string $message = null, \Exception $previous = null, array $headers = array(), ?int $code = 0)
+    public function __construct(int $statusCode, string $message = null, \Exception $previous = null, array $headers = [], ?int $code = 0)
     {
         $this->statusCode = $statusCode;
         $this->headers = $headers;
diff --git a/src/Symfony/Component/HttpKernel/Exception/LengthRequiredHttpException.php b/src/Symfony/Component/HttpKernel/Exception/LengthRequiredHttpException.php
index 46b76ba6a3..287c07a0c1 100644
--- a/src/Symfony/Component/HttpKernel/Exception/LengthRequiredHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/LengthRequiredHttpException.php
@@ -22,7 +22,7 @@ class LengthRequiredHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(411, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/MethodNotAllowedHttpException.php b/src/Symfony/Component/HttpKernel/Exception/MethodNotAllowedHttpException.php
index b0085c16fa..e9a3f069f1 100644
--- a/src/Symfony/Component/HttpKernel/Exception/MethodNotAllowedHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/MethodNotAllowedHttpException.php
@@ -23,7 +23,7 @@ class MethodNotAllowedHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(array $allow, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = array())
+    public function __construct(array $allow, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = [])
     {
         $headers['Allow'] = strtoupper(implode(', ', $allow));
 
diff --git a/src/Symfony/Component/HttpKernel/Exception/NotAcceptableHttpException.php b/src/Symfony/Component/HttpKernel/Exception/NotAcceptableHttpException.php
index 32c3089374..5596330881 100644
--- a/src/Symfony/Component/HttpKernel/Exception/NotAcceptableHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/NotAcceptableHttpException.php
@@ -22,7 +22,7 @@ class NotAcceptableHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(406, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/NotFoundHttpException.php b/src/Symfony/Component/HttpKernel/Exception/NotFoundHttpException.php
index 433ff9b9e0..551b3edc59 100644
--- a/src/Symfony/Component/HttpKernel/Exception/NotFoundHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/NotFoundHttpException.php
@@ -22,7 +22,7 @@ class NotFoundHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(404, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/PreconditionFailedHttpException.php b/src/Symfony/Component/HttpKernel/Exception/PreconditionFailedHttpException.php
index 108178889c..c1a59fb8df 100644
--- a/src/Symfony/Component/HttpKernel/Exception/PreconditionFailedHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/PreconditionFailedHttpException.php
@@ -22,7 +22,7 @@ class PreconditionFailedHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(412, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/PreconditionRequiredHttpException.php b/src/Symfony/Component/HttpKernel/Exception/PreconditionRequiredHttpException.php
index 3078328241..fd95b042c5 100644
--- a/src/Symfony/Component/HttpKernel/Exception/PreconditionRequiredHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/PreconditionRequiredHttpException.php
@@ -24,7 +24,7 @@ class PreconditionRequiredHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(428, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/ServiceUnavailableHttpException.php b/src/Symfony/Component/HttpKernel/Exception/ServiceUnavailableHttpException.php
index 667764779f..18b12d83cc 100644
--- a/src/Symfony/Component/HttpKernel/Exception/ServiceUnavailableHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/ServiceUnavailableHttpException.php
@@ -23,7 +23,7 @@ class ServiceUnavailableHttpException extends HttpException
      * @param int        $code       The internal exception code
      * @param array      $headers
      */
-    public function __construct($retryAfter = null, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = array())
+    public function __construct($retryAfter = null, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = [])
     {
         if ($retryAfter) {
             $headers['Retry-After'] = $retryAfter;
diff --git a/src/Symfony/Component/HttpKernel/Exception/TooManyRequestsHttpException.php b/src/Symfony/Component/HttpKernel/Exception/TooManyRequestsHttpException.php
index 60b024c330..91e65e2d70 100644
--- a/src/Symfony/Component/HttpKernel/Exception/TooManyRequestsHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/TooManyRequestsHttpException.php
@@ -25,7 +25,7 @@ class TooManyRequestsHttpException extends HttpException
      * @param int        $code       The internal exception code
      * @param array      $headers
      */
-    public function __construct($retryAfter = null, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = array())
+    public function __construct($retryAfter = null, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = [])
     {
         if ($retryAfter) {
             $headers['Retry-After'] = $retryAfter;
diff --git a/src/Symfony/Component/HttpKernel/Exception/UnauthorizedHttpException.php b/src/Symfony/Component/HttpKernel/Exception/UnauthorizedHttpException.php
index 17ebb25464..bc42877fe8 100644
--- a/src/Symfony/Component/HttpKernel/Exception/UnauthorizedHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/UnauthorizedHttpException.php
@@ -23,7 +23,7 @@ class UnauthorizedHttpException extends HttpException
      * @param int        $code      The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $challenge, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = array())
+    public function __construct(string $challenge, string $message = null, \Exception $previous = null, ?int $code = 0, array $headers = [])
     {
         $headers['WWW-Authenticate'] = $challenge;
 
diff --git a/src/Symfony/Component/HttpKernel/Exception/UnprocessableEntityHttpException.php b/src/Symfony/Component/HttpKernel/Exception/UnprocessableEntityHttpException.php
index 3a4b40c984..9cad444c6c 100644
--- a/src/Symfony/Component/HttpKernel/Exception/UnprocessableEntityHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/UnprocessableEntityHttpException.php
@@ -22,7 +22,7 @@ class UnprocessableEntityHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(422, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Exception/UnsupportedMediaTypeHttpException.php b/src/Symfony/Component/HttpKernel/Exception/UnsupportedMediaTypeHttpException.php
index ed6861154a..e52e1d88d2 100644
--- a/src/Symfony/Component/HttpKernel/Exception/UnsupportedMediaTypeHttpException.php
+++ b/src/Symfony/Component/HttpKernel/Exception/UnsupportedMediaTypeHttpException.php
@@ -22,7 +22,7 @@ class UnsupportedMediaTypeHttpException extends HttpException
      * @param int        $code     The internal exception code
      * @param array      $headers
      */
-    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = array())
+    public function __construct(string $message = null, \Exception $previous = null, int $code = 0, array $headers = [])
     {
         parent::__construct(415, $message, $previous, $headers, $code);
     }
diff --git a/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
index 6ab6ec1fd0..5b76f7a8d8 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/AbstractSurrogateFragmentRenderer.php
@@ -59,7 +59,7 @@ abstract class AbstractSurrogateFragmentRenderer extends RoutableFragmentRendere
      *
      * @see Symfony\Component\HttpKernel\HttpCache\SurrogateInterface
      */
-    public function render($uri, Request $request, array $options = array())
+    public function render($uri, Request $request, array $options = [])
     {
         if (!$this->surrogate || !$this->surrogate->hasSurrogateCapability($request)) {
             if ($uri instanceof ControllerReference && $this->containsNonScalars($uri->attributes)) {
diff --git a/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php b/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
index 0c31826b27..758f0e8fc1 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/FragmentHandler.php
@@ -29,7 +29,7 @@ use Symfony\Component\HttpKernel\Controller\ControllerReference;
 class FragmentHandler
 {
     private $debug;
-    private $renderers = array();
+    private $renderers = [];
     private $requestStack;
 
     /**
@@ -37,7 +37,7 @@ class FragmentHandler
      * @param FragmentRendererInterface[] $renderers    An array of FragmentRendererInterface instances
      * @param bool                        $debug        Whether the debug mode is enabled or not
      */
-    public function __construct(RequestStack $requestStack, array $renderers = array(), bool $debug = false)
+    public function __construct(RequestStack $requestStack, array $renderers = [], bool $debug = false)
     {
         $this->requestStack = $requestStack;
         foreach ($renderers as $renderer) {
@@ -70,7 +70,7 @@ class FragmentHandler
      * @throws \InvalidArgumentException when the renderer does not exist
      * @throws \LogicException           when no master request is being handled
      */
-    public function render($uri, $renderer = 'inline', array $options = array())
+    public function render($uri, $renderer = 'inline', array $options = [])
     {
         if (!isset($options['ignore_errors'])) {
             $options['ignore_errors'] = !$this->debug;
diff --git a/src/Symfony/Component/HttpKernel/Fragment/FragmentRendererInterface.php b/src/Symfony/Component/HttpKernel/Fragment/FragmentRendererInterface.php
index bcf4e9944a..8e454a01a6 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/FragmentRendererInterface.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/FragmentRendererInterface.php
@@ -31,7 +31,7 @@ interface FragmentRendererInterface
      *
      * @return Response A Response instance
      */
-    public function render($uri, Request $request, array $options = array());
+    public function render($uri, Request $request, array $options = []);
 
     /**
      * Gets the name of the strategy.
diff --git a/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
index 3ee0cfa264..7b8e761922 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/HIncludeFragmentRenderer.php
@@ -81,7 +81,7 @@ class HIncludeFragmentRenderer extends RoutableFragmentRenderer
      *  * id:         An optional hx:include tag id attribute
      *  * attributes: An optional array of hx:include tag attributes
      */
-    public function render($uri, Request $request, array $options = array())
+    public function render($uri, Request $request, array $options = [])
     {
         if ($uri instanceof ControllerReference) {
             if (null === $this->signer) {
@@ -102,7 +102,7 @@ class HIncludeFragmentRenderer extends RoutableFragmentRenderer
             $content = $template;
         }
 
-        $attributes = isset($options['attributes']) && \is_array($options['attributes']) ? $options['attributes'] : array();
+        $attributes = isset($options['attributes']) && \is_array($options['attributes']) ? $options['attributes'] : [];
         if (isset($options['id']) && $options['id']) {
             $attributes['id'] = $options['id'];
         }
diff --git a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
index ecf12f2182..5ee09fb1a7 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
@@ -43,7 +43,7 @@ class InlineFragmentRenderer extends RoutableFragmentRenderer
      *
      *  * alt: an alternative URI to render in case of an error
      */
-    public function render($uri, Request $request, array $options = array())
+    public function render($uri, Request $request, array $options = [])
     {
         $reference = null;
         if ($uri instanceof ControllerReference) {
@@ -54,10 +54,10 @@ class InlineFragmentRenderer extends RoutableFragmentRenderer
             // want that as we want to preserve objects (so we manually set Request attributes
             // below instead)
             $attributes = $reference->attributes;
-            $reference->attributes = array();
+            $reference->attributes = [];
 
             // The request format and locale might have been overridden by the user
-            foreach (array('_format', '_locale') as $key) {
+            foreach (['_format', '_locale'] as $key) {
                 if (isset($attributes[$key])) {
                     $reference->attributes[$key] = $attributes[$key];
                 }
@@ -113,7 +113,7 @@ class InlineFragmentRenderer extends RoutableFragmentRenderer
         unset($server['HTTP_IF_MODIFIED_SINCE']);
         unset($server['HTTP_IF_NONE_MATCH']);
 
-        $subRequest = Request::create($uri, 'get', array(), $cookies, array(), $server);
+        $subRequest = Request::create($uri, 'get', [], $cookies, [], $server);
         if ($request->headers->has('Surrogate-Capability')) {
             $subRequest->headers->set('Surrogate-Capability', $request->headers->get('Surrogate-Capability'));
         }
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/AbstractSurrogate.php b/src/Symfony/Component/HttpKernel/HttpCache/AbstractSurrogate.php
index 3b2d5f262c..8918a30570 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/AbstractSurrogate.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/AbstractSurrogate.php
@@ -24,16 +24,16 @@ use Symfony\Component\HttpKernel\HttpKernelInterface;
 abstract class AbstractSurrogate implements SurrogateInterface
 {
     protected $contentTypes;
-    protected $phpEscapeMap = array(
-        array('<?', '<%', '<s', '<S'),
-        array('<?php echo "<?"; ?>', '<?php echo "<%"; ?>', '<?php echo "<s"; ?>', '<?php echo "<S"; ?>'),
-    );
+    protected $phpEscapeMap = [
+        ['<?', '<%', '<s', '<S'],
+        ['<?php echo "<?"; ?>', '<?php echo "<%"; ?>', '<?php echo "<s"; ?>', '<?php echo "<S"; ?>'],
+    ];
 
     /**
      * @param array $contentTypes An array of content-type that should be parsed for Surrogate information
      *                            (default: text/html, text/xml, application/xhtml+xml, and application/xml)
      */
-    public function __construct(array $contentTypes = array('text/html', 'text/xml', 'application/xhtml+xml', 'application/xml'))
+    public function __construct(array $contentTypes = ['text/html', 'text/xml', 'application/xhtml+xml', 'application/xml'])
     {
         $this->contentTypes = $contentTypes;
     }
@@ -90,7 +90,7 @@ abstract class AbstractSurrogate implements SurrogateInterface
      */
     public function handle(HttpCache $cache, $uri, $alt, $ignoreErrors)
     {
-        $subRequest = Request::create($uri, Request::METHOD_GET, array(), $cache->getRequest()->cookies->all(), array(), $cache->getRequest()->server->all());
+        $subRequest = Request::create($uri, Request::METHOD_GET, [], $cache->getRequest()->cookies->all(), [], $cache->getRequest()->server->all());
 
         try {
             $response = $cache->handle($subRequest, HttpKernelInterface::SUB_REQUEST, true);
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Esi.php b/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
index 69134c71a1..dc62990b40 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Esi.php
@@ -85,7 +85,7 @@ class Esi extends AbstractSurrogate
 
         $i = 1;
         while (isset($chunks[$i])) {
-            $options = array();
+            $options = [];
             preg_match_all('/(src|onerror|alt)="([^"]*?)"/', $chunks[$i], $matches, PREG_SET_ORDER);
             foreach ($matches as $set) {
                 $options[$set[1]] = $set[2];
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
index 6980745add..84b01659f9 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php
@@ -32,8 +32,8 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
     private $request;
     private $surrogate;
     private $surrogateCacheStrategy;
-    private $options = array();
-    private $traces = array();
+    private $options = [];
+    private $traces = [];
 
     /**
      * Constructor.
@@ -70,24 +70,24 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
      *                            This setting is overridden by the stale-if-error HTTP Cache-Control extension
      *                            (see RFC 5861).
      */
-    public function __construct(HttpKernelInterface $kernel, StoreInterface $store, SurrogateInterface $surrogate = null, array $options = array())
+    public function __construct(HttpKernelInterface $kernel, StoreInterface $store, SurrogateInterface $surrogate = null, array $options = [])
     {
         $this->store = $store;
         $this->kernel = $kernel;
         $this->surrogate = $surrogate;
 
         // needed in case there is a fatal error because the backend is too slow to respond
-        register_shutdown_function(array($this->store, 'cleanup'));
+        register_shutdown_function([$this->store, 'cleanup']);
 
-        $this->options = array_merge(array(
+        $this->options = array_merge([
             'debug' => false,
             'default_ttl' => 0,
-            'private_headers' => array('Authorization', 'Cookie'),
+            'private_headers' => ['Authorization', 'Cookie'],
             'allow_reload' => false,
             'allow_revalidate' => false,
             'stale_while_revalidate' => 2,
             'stale_if_error' => 60,
-        ), $options);
+        ], $options);
     }
 
     /**
@@ -117,7 +117,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
      */
     public function getLog()
     {
-        $log = array();
+        $log = [];
         foreach ($this->traces as $request => $traces) {
             $log[] = sprintf('%s: %s', $request, implode(', ', $traces));
         }
@@ -164,7 +164,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
     {
         // FIXME: catch exceptions and implement a 500 error page here? -> in Varnish, there is a built-in error page mechanism
         if (HttpKernelInterface::MASTER_REQUEST === $type) {
-            $this->traces = array();
+            $this->traces = [];
             // Keep a clone of the original request for surrogates so they can access it.
             // We must clone here to get a separate instance because the application will modify the request during
             // the application flow (we know it always does because we do ourselves by setting REMOTE_ADDR to 127.0.0.1
@@ -175,7 +175,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
             }
         }
 
-        $this->traces[$this->getTraceKey($request)] = array();
+        $this->traces[$this->getTraceKey($request)] = [];
 
         if (!$request->isMethodSafe(false)) {
             $response = $this->invalidate($request, $catch);
@@ -260,9 +260,9 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
                 $this->store->invalidate($request);
 
                 // As per the RFC, invalidate Location and Content-Location URLs if present
-                foreach (array('Location', 'Content-Location') as $header) {
+                foreach (['Location', 'Content-Location'] as $header) {
                     if ($uri = $response->headers->get($header)) {
-                        $subRequest = Request::create($uri, 'get', array(), array(), array(), $request->server->all());
+                        $subRequest = Request::create($uri, 'get', [], [], [], $request->server->all());
 
                         $this->store->invalidate($subRequest);
                     }
@@ -357,7 +357,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
         // Add our cached etag validator to the environment.
         // We keep the etags from the client to handle the case when the client
         // has a different private valid entry which is not cached here.
-        $cachedEtags = $entry->getEtag() ? array($entry->getEtag()) : array();
+        $cachedEtags = $entry->getEtag() ? [$entry->getEtag()] : [];
         $requestEtags = $request->getETags();
         if ($etags = array_unique(array_merge($cachedEtags, $requestEtags))) {
             $subRequest->headers->set('if_none_match', implode(', ', $etags));
@@ -377,7 +377,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
             $entry = clone $entry;
             $entry->headers->remove('Date');
 
-            foreach (array('Date', 'Expires', 'Cache-Control', 'ETag', 'Last-Modified') as $name) {
+            foreach (['Date', 'Expires', 'Cache-Control', 'ETag', 'Last-Modified'] as $name) {
                 if ($response->headers->has($name)) {
                     $entry->headers->set($name, $response->headers->get($name));
                 }
@@ -448,7 +448,7 @@ class HttpCache implements HttpKernelInterface, TerminableInterface
         $response = SubRequestHandler::handle($this->kernel, $request, HttpKernelInterface::MASTER_REQUEST, $catch);
 
         // we don't implement the stale-if-error on Requests, which is nonetheless part of the RFC
-        if (null !== $entry && \in_array($response->getStatusCode(), array(500, 502, 503, 504))) {
+        if (null !== $entry && \in_array($response->getStatusCode(), [500, 502, 503, 504])) {
             if (null === $age = $entry->headers->getCacheControlDirective('stale-if-error')) {
                 $age = $this->options['stale_if_error'];
             }
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php b/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
index 672cc893fe..168e9564b0 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/ResponseCacheStrategy.php
@@ -30,8 +30,8 @@ class ResponseCacheStrategy implements ResponseCacheStrategyInterface
 {
     private $cacheable = true;
     private $embeddedResponses = 0;
-    private $ttls = array();
-    private $maxAges = array();
+    private $ttls = [];
+    private $maxAges = [];
     private $isNotCacheableResponseEmbedded = false;
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php b/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
index 58df176019..eaaa230b50 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Ssi.php
@@ -70,7 +70,7 @@ class Ssi extends AbstractSurrogate
 
         $i = 1;
         while (isset($chunks[$i])) {
-            $options = array();
+            $options = [];
             preg_match_all('/(virtual)="([^"]*?)"/', $chunks[$i], $matches, PREG_SET_ORDER);
             foreach ($matches as $set) {
                 $options[$set[1]] = $set[2];
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index 925ca96fd4..0ca14c7590 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -38,7 +38,7 @@ class Store implements StoreInterface
             throw new \RuntimeException(sprintf('Unable to create the store directory (%s).', $this->root));
         }
         $this->keyCache = new \SplObjectStorage();
-        $this->locks = array();
+        $this->locks = [];
     }
 
     /**
@@ -52,7 +52,7 @@ class Store implements StoreInterface
             fclose($lock);
         }
 
-        $this->locks = array();
+        $this->locks = [];
     }
 
     /**
@@ -190,11 +190,11 @@ class Store implements StoreInterface
         }
 
         // read existing cache entries, remove non-varying, and add this one to the list
-        $entries = array();
+        $entries = [];
         $vary = $response->headers->get('vary');
         foreach ($this->getMetadata($key) as $entry) {
             if (!isset($entry[1]['vary'][0])) {
-                $entry[1]['vary'] = array('');
+                $entry[1]['vary'] = [''];
             }
 
             if ($entry[1]['vary'][0] != $vary || !$this->requestsMatch($vary, $entry[0], $storedEnv)) {
@@ -205,7 +205,7 @@ class Store implements StoreInterface
         $headers = $this->persistResponse($response);
         unset($headers['age']);
 
-        array_unshift($entries, array($storedEnv, $headers));
+        array_unshift($entries, [$storedEnv, $headers]);
 
         if (false === $this->save($key, serialize($entries))) {
             throw new \RuntimeException('Unable to store the metadata.');
@@ -234,13 +234,13 @@ class Store implements StoreInterface
         $modified = false;
         $key = $this->getCacheKey($request);
 
-        $entries = array();
+        $entries = [];
         foreach ($this->getMetadata($key) as $entry) {
             $response = $this->restoreResponse($entry[1]);
             if ($response->isFresh()) {
                 $response->expire();
                 $modified = true;
-                $entries[] = array($entry[0], $this->persistResponse($response));
+                $entries[] = [$entry[0], $this->persistResponse($response)];
             } else {
                 $entries[] = $entry;
             }
@@ -291,7 +291,7 @@ class Store implements StoreInterface
     private function getMetadata($key)
     {
         if (!$entries = $this->load($key)) {
-            return array();
+            return [];
         }
 
         return unserialize($entries);
@@ -462,7 +462,7 @@ class Store implements StoreInterface
     private function persistResponse(Response $response)
     {
         $headers = $response->headers->all();
-        $headers['X-Status'] = array($response->getStatusCode());
+        $headers['X-Status'] = [$response->getStatusCode()];
 
         return $headers;
     }
@@ -481,7 +481,7 @@ class Store implements StoreInterface
         unset($headers['X-Status']);
 
         if (null !== $body) {
-            $headers['X-Body-File'] = array($body);
+            $headers['X-Body-File'] = [$body];
         }
 
         return new Response($body, $status, $headers);
diff --git a/src/Symfony/Component/HttpKernel/HttpCache/SubRequestHandler.php b/src/Symfony/Component/HttpKernel/HttpCache/SubRequestHandler.php
index 84d7a84e79..cef9817e01 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/SubRequestHandler.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/SubRequestHandler.php
@@ -32,13 +32,13 @@ class SubRequestHandler
         // remove untrusted values
         $remoteAddr = $request->server->get('REMOTE_ADDR');
         if (!IpUtils::checkIp($remoteAddr, $trustedProxies)) {
-            $trustedHeaders = array(
+            $trustedHeaders = [
                 'FORWARDED' => $trustedHeaderSet & Request::HEADER_FORWARDED,
                 'X_FORWARDED_FOR' => $trustedHeaderSet & Request::HEADER_X_FORWARDED_FOR,
                 'X_FORWARDED_HOST' => $trustedHeaderSet & Request::HEADER_X_FORWARDED_HOST,
                 'X_FORWARDED_PROTO' => $trustedHeaderSet & Request::HEADER_X_FORWARDED_PROTO,
                 'X_FORWARDED_PORT' => $trustedHeaderSet & Request::HEADER_X_FORWARDED_PORT,
-            );
+            ];
             foreach (array_filter($trustedHeaders) as $name => $key) {
                 $request->headers->remove($name);
                 $request->server->remove('HTTP_'.$name);
@@ -46,8 +46,8 @@ class SubRequestHandler
         }
 
         // compute trusted values, taking any trusted proxies into account
-        $trustedIps = array();
-        $trustedValues = array();
+        $trustedIps = [];
+        $trustedValues = [];
         foreach (array_reverse($request->getClientIps()) as $ip) {
             $trustedIps[] = $ip;
             $trustedValues[] = sprintf('for="%s"', $ip);
@@ -78,7 +78,7 @@ class SubRequestHandler
 
         // ensure 127.0.0.1 is set as trusted proxy
         if (!IpUtils::checkIp('127.0.0.1', $trustedProxies)) {
-            Request::setTrustedProxies(array_merge($trustedProxies, array('127.0.0.1')), Request::getTrustedHeaderSet());
+            Request::setTrustedProxies(array_merge($trustedProxies, ['127.0.0.1']), Request::getTrustedHeaderSet());
         }
 
         try {
diff --git a/src/Symfony/Component/HttpKernel/HttpKernel.php b/src/Symfony/Component/HttpKernel/HttpKernel.php
index 7ed4118ea4..11eb718aff 100644
--- a/src/Symfony/Component/HttpKernel/HttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/HttpKernel.php
@@ -260,7 +260,7 @@ class HttpKernel implements HttpKernelInterface, TerminableInterface
         }
 
         if (\is_array($var)) {
-            $a = array();
+            $a = [];
             foreach ($var as $k => $v) {
                 $a[] = sprintf('%s => ...', $k);
             }
diff --git a/src/Symfony/Component/HttpKernel/Kernel.php b/src/Symfony/Component/HttpKernel/Kernel.php
index 699aa8e478..346f156ba4 100644
--- a/src/Symfony/Component/HttpKernel/Kernel.php
+++ b/src/Symfony/Component/HttpKernel/Kernel.php
@@ -52,7 +52,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     /**
      * @var BundleInterface[]
      */
-    protected $bundles = array();
+    protected $bundles = [];
 
     protected $container;
     /**
@@ -258,7 +258,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
         $isResource = 0 === strpos($path, 'Resources') && null !== $dir;
         $overridePath = substr($path, 9);
         $bundle = $this->getBundle($bundleName);
-        $files = array();
+        $files = [];
 
         if ($isResource && file_exists($file = $dir.'/'.$bundle->getName().$overridePath)) {
             $files[] = $file;
@@ -409,7 +409,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     public function getAnnotatedClassesToCompile(): array
     {
-        return array();
+        return [];
     }
 
     /**
@@ -420,7 +420,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     protected function initializeBundles()
     {
         // init bundles
-        $this->bundles = array();
+        $this->bundles = [];
         foreach ($this->registerBundles() as $bundle) {
             $name = $bundle->getName();
             if (isset($this->bundles[$name])) {
@@ -498,7 +498,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
         }
 
         if ($this->debug) {
-            $collectedLogs = array();
+            $collectedLogs = [];
             $previousHandler = \defined('PHPUNIT_COMPOSER_INSTALL');
             $previousHandler = $previousHandler ?: set_error_handler(function ($type, $message, $file, $line) use (&$collectedLogs, &$previousHandler) {
                 if (E_USER_DEPRECATED !== $type && E_DEPRECATED !== $type) {
@@ -522,19 +522,19 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
                 // Remove frames added by DebugClassLoader.
                 for ($i = \count($backtrace) - 2; 0 < $i; --$i) {
                     if (DebugClassLoader::class === ($backtrace[$i]['class'] ?? null)) {
-                        $backtrace = array($backtrace[$i + 1]);
+                        $backtrace = [$backtrace[$i + 1]];
                         break;
                     }
                 }
 
-                $collectedLogs[$message] = array(
+                $collectedLogs[$message] = [
                     'type' => $type,
                     'message' => $message,
                     'file' => $file,
                     'line' => $line,
-                    'trace' => array($backtrace[0]),
+                    'trace' => [$backtrace[0]],
                     'count' => 1,
-                );
+                ];
             });
         }
 
@@ -571,7 +571,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             // Because concurrent requests might still be using them,
             // old container files are not removed immediately,
             // but on a next dump of the container.
-            static $legacyContainers = array();
+            static $legacyContainers = [];
             $oldContainerDir = \dirname($oldContainer->getFileName());
             $legacyContainers[$oldContainerDir.'.legacy'] = true;
             foreach (glob(\dirname($oldContainerDir).\DIRECTORY_SEPARATOR.'*.legacy') as $legacyContainer) {
@@ -595,18 +595,18 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     protected function getKernelParameters()
     {
-        $bundles = array();
-        $bundlesMetadata = array();
+        $bundles = [];
+        $bundlesMetadata = [];
 
         foreach ($this->bundles as $name => $bundle) {
             $bundles[$name] = \get_class($bundle);
-            $bundlesMetadata[$name] = array(
+            $bundlesMetadata[$name] = [
                 'path' => $bundle->getPath(),
                 'namespace' => $bundle->getNamespace(),
-            );
+            ];
         }
 
-        return array(
+        return [
             /*
              * @deprecated since Symfony 4.2, use kernel.project_dir instead
              */
@@ -624,7 +624,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             'kernel.bundles_metadata' => $bundlesMetadata,
             'kernel.charset' => $this->getCharset(),
             'kernel.container_class' => $this->getContainerClass(),
-        );
+        ];
     }
 
     /**
@@ -636,7 +636,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     protected function buildContainer()
     {
-        foreach (array('cache' => $this->warmupDir ?: $this->getCacheDir(), 'logs' => $this->getLogDir()) as $name => $dir) {
+        foreach (['cache' => $this->warmupDir ?: $this->getCacheDir(), 'logs' => $this->getLogDir()] as $name => $dir) {
             if (!is_dir($dir)) {
                 if (false === @mkdir($dir, 0777, true) && !is_dir($dir)) {
                     throw new \RuntimeException(sprintf("Unable to create the %s directory (%s)\n", $name, $dir));
@@ -664,7 +664,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
      */
     protected function prepareContainer(ContainerBuilder $container)
     {
-        $extensions = array();
+        $extensions = [];
         foreach ($this->bundles as $bundle) {
             if ($extension = $bundle->getContainerExtension()) {
                 $container->registerExtension($extension);
@@ -726,14 +726,14 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             $dumper->setProxyDumper(new ProxyDumper());
         }
 
-        $content = $dumper->dump(array(
+        $content = $dumper->dump([
             'class' => $class,
             'base_class' => $baseClass,
             'file' => $cache->getPath(),
             'as_files' => true,
             'debug' => $this->debug,
             'build_time' => $container->hasParameter('kernel.container_build_time') ? $container->getParameter('kernel.container_build_time') : time(),
-        ));
+        ]);
 
         $rootCode = array_pop($content);
         $dir = \dirname($cache->getPath()).'/';
@@ -759,7 +759,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
     protected function getContainerLoader(ContainerInterface $container)
     {
         $locator = new FileLocator($this);
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new XmlFileLoader($container, $locator),
             new YamlFileLoader($container, $locator),
             new IniFileLoader($container, $locator),
@@ -767,7 +767,7 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
             new GlobFileLoader($container, $locator),
             new DirectoryLoader($container, $locator),
             new ClosureLoader($container),
-        ));
+        ]);
 
         return new DelegatingLoader($resolver);
     }
@@ -811,8 +811,8 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
                 }
 
                 // replace multiple new lines with a single newline
-                $rawChunk .= preg_replace(array('/\n{2,}/S'), "\n", $token[1]);
-            } elseif (\in_array($token[0], array(T_COMMENT, T_DOC_COMMENT))) {
+                $rawChunk .= preg_replace(['/\n{2,}/S'], "\n", $token[1]);
+            } elseif (\in_array($token[0], [T_COMMENT, T_DOC_COMMENT])) {
                 $ignoreSpace = true;
             } else {
                 $rawChunk .= $token[1];
@@ -835,12 +835,12 @@ abstract class Kernel implements KernelInterface, RebootableInterface, Terminabl
 
     public function serialize()
     {
-        return serialize(array($this->environment, $this->debug));
+        return serialize([$this->environment, $this->debug]);
     }
 
     public function unserialize($data)
     {
-        list($environment, $debug) = unserialize($data, array('allowed_classes' => false));
+        list($environment, $debug) = unserialize($data, ['allowed_classes' => false]);
 
         $this->__construct($environment, $debug);
     }
diff --git a/src/Symfony/Component/HttpKernel/Log/Logger.php b/src/Symfony/Component/HttpKernel/Log/Logger.php
index 8b671d84df..2344aa0a54 100644
--- a/src/Symfony/Component/HttpKernel/Log/Logger.php
+++ b/src/Symfony/Component/HttpKernel/Log/Logger.php
@@ -22,7 +22,7 @@ use Psr\Log\LogLevel;
  */
 class Logger extends AbstractLogger
 {
-    private static $levels = array(
+    private static $levels = [
         LogLevel::DEBUG => 0,
         LogLevel::INFO => 1,
         LogLevel::NOTICE => 2,
@@ -31,7 +31,7 @@ class Logger extends AbstractLogger
         LogLevel::CRITICAL => 5,
         LogLevel::ALERT => 6,
         LogLevel::EMERGENCY => 7,
-    );
+    ];
 
     private $minLevelIndex;
     private $formatter;
@@ -57,7 +57,7 @@ class Logger extends AbstractLogger
         }
 
         $this->minLevelIndex = self::$levels[$minLevel];
-        $this->formatter = $formatter ?: array($this, 'format');
+        $this->formatter = $formatter ?: [$this, 'format'];
         if (false === $this->handle = \is_resource($output) ? $output : @fopen($output, 'a')) {
             throw new InvalidArgumentException(sprintf('Unable to open "%s".', $output));
         }
@@ -66,7 +66,7 @@ class Logger extends AbstractLogger
     /**
      * {@inheritdoc}
      */
-    public function log($level, $message, array $context = array())
+    public function log($level, $message, array $context = [])
     {
         if (!isset(self::$levels[$level])) {
             throw new InvalidArgumentException(sprintf('The log level "%s" does not exist.', $level));
@@ -83,7 +83,7 @@ class Logger extends AbstractLogger
     private function format(string $level, string $message, array $context): string
     {
         if (false !== strpos($message, '{')) {
-            $replacements = array();
+            $replacements = [];
             foreach ($context as $key => $val) {
                 if (null === $val || is_scalar($val) || (\is_object($val) && method_exists($val, '__toString'))) {
                     $replacements["{{$key}}"] = $val;
diff --git a/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php b/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
index 955afed580..863998fd31 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php
@@ -52,13 +52,13 @@ class FileProfilerStorage implements ProfilerStorageInterface
         $file = $this->getIndexFilename();
 
         if (!file_exists($file)) {
-            return array();
+            return [];
         }
 
         $file = fopen($file, 'r');
         fseek($file, 0, SEEK_END);
 
-        $result = array();
+        $result = [];
         while (\count($result) < $limit && $line = $this->readLineFromFile($file)) {
             $values = str_getcsv($line);
             list($csvToken, $csvIp, $csvMethod, $csvUrl, $csvTime, $csvParent, $csvStatusCode) = $values;
@@ -76,7 +76,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
                 continue;
             }
 
-            $result[$csvToken] = array(
+            $result[$csvToken] = [
                 'token' => $csvToken,
                 'ip' => $csvIp,
                 'method' => $csvMethod,
@@ -84,7 +84,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
                 'time' => $csvTime,
                 'parent' => $csvParent,
                 'status_code' => $csvStatusCode,
-            );
+            ];
         }
 
         fclose($file);
@@ -149,7 +149,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
         }, $profile->getChildren()));
 
         // Store profile
-        $data = array(
+        $data = [
             'token' => $profileToken,
             'parent' => $parentToken,
             'children' => $childrenToken,
@@ -159,7 +159,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
             'url' => $profile->getUrl(),
             'time' => $profile->getTime(),
             'status_code' => $profile->getStatusCode(),
-        );
+        ];
 
         if (false === file_put_contents($file, serialize($data))) {
             return false;
@@ -171,7 +171,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
                 return false;
             }
 
-            fputcsv($file, array(
+            fputcsv($file, [
                 $profile->getToken(),
                 $profile->getIp(),
                 $profile->getMethod(),
@@ -179,7 +179,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
                 $profile->getTime(),
                 $profile->getParentToken(),
                 $profile->getStatusCode(),
-            ));
+            ]);
             fclose($file);
         }
 
diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profile.php b/src/Symfony/Component/HttpKernel/Profiler/Profile.php
index 4716a229ea..f896c00e52 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profile.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profile.php
@@ -25,7 +25,7 @@ class Profile
     /**
      * @var DataCollectorInterface[]
      */
-    private $collectors = array();
+    private $collectors = [];
 
     private $ip;
     private $method;
@@ -41,7 +41,7 @@ class Profile
     /**
      * @var Profile[]
      */
-    private $children = array();
+    private $children = [];
 
     public function __construct(string $token)
     {
@@ -201,7 +201,7 @@ class Profile
      */
     public function setChildren(array $children)
     {
-        $this->children = array();
+        $this->children = [];
         foreach ($children as $child) {
             $this->addChild($child);
         }
@@ -262,7 +262,7 @@ class Profile
      */
     public function setCollectors(array $collectors)
     {
-        $this->collectors = array();
+        $this->collectors = [];
         foreach ($collectors as $collector) {
             $this->addCollector($collector);
         }
@@ -290,6 +290,6 @@ class Profile
 
     public function __sleep()
     {
-        return array('token', 'parent', 'children', 'collectors', 'ip', 'method', 'url', 'time', 'statusCode');
+        return ['token', 'parent', 'children', 'collectors', 'ip', 'method', 'url', 'time', 'statusCode'];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
index 809a3396b9..4a32c78420 100644
--- a/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
+++ b/src/Symfony/Component/HttpKernel/Profiler/Profiler.php
@@ -31,7 +31,7 @@ class Profiler implements ResetInterface
     /**
      * @var DataCollectorInterface[]
      */
-    private $collectors = array();
+    private $collectors = [];
 
     private $logger;
     private $initiallyEnabled = true;
@@ -101,7 +101,7 @@ class Profiler implements ResetInterface
         }
 
         if (!($ret = $this->storage->write($profile)) && null !== $this->logger) {
-            $this->logger->warning('Unable to store the profiler information.', array('configured_storage' => \get_class($this->storage)));
+            $this->logger->warning('Unable to store the profiler information.', ['configured_storage' => \get_class($this->storage)]);
         }
 
         return $ret;
@@ -196,9 +196,9 @@ class Profiler implements ResetInterface
      *
      * @param DataCollectorInterface[] $collectors An array of collectors
      */
-    public function set(array $collectors = array())
+    public function set(array $collectors = [])
     {
-        $this->collectors = array();
+        $this->collectors = [];
         foreach ($collectors as $collector) {
             $this->add($collector);
         }
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
index 5f09e4b226..9892db20ea 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/ChainCacheClearerTest.php
@@ -35,7 +35,7 @@ class ChainCacheClearerTest extends TestCase
             ->expects($this->once())
             ->method('clear');
 
-        $chainClearer = new ChainCacheClearer(array($clearer));
+        $chainClearer = new ChainCacheClearer([$clearer]);
         $chainClearer->clear(self::$cacheDir);
     }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/Psr6CacheClearerTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/Psr6CacheClearerTest.php
index e1d2fe82e9..d24131dae5 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheClearer/Psr6CacheClearerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheClearer/Psr6CacheClearerTest.php
@@ -24,7 +24,7 @@ class Psr6CacheClearerTest extends TestCase
             ->expects($this->once())
             ->method('clear');
 
-        (new Psr6CacheClearer(array('pool' => $pool)))->clear('');
+        (new Psr6CacheClearer(['pool' => $pool]))->clear('');
     }
 
     public function testClearPool()
@@ -34,7 +34,7 @@ class Psr6CacheClearerTest extends TestCase
             ->expects($this->once())
             ->method('clear');
 
-        (new Psr6CacheClearer(array('pool' => $pool)))->clearPool('pool');
+        (new Psr6CacheClearer(['pool' => $pool]))->clearPool('pool');
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
index 09ba7020ff..7753600959 100644
--- a/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/CacheWarmer/CacheWarmerAggregateTest.php
@@ -34,7 +34,7 @@ class CacheWarmerAggregateTest extends TestCase
         $warmer
             ->expects($this->once())
             ->method('warmUp');
-        $aggregate = new CacheWarmerAggregate(array($warmer));
+        $aggregate = new CacheWarmerAggregate([$warmer]);
         $aggregate->warmUp(self::$cacheDir);
     }
 
@@ -48,7 +48,7 @@ class CacheWarmerAggregateTest extends TestCase
             ->expects($this->once())
             ->method('warmUp');
 
-        $aggregate = new CacheWarmerAggregate(array($warmer));
+        $aggregate = new CacheWarmerAggregate([$warmer]);
         $aggregate->enableOptionalWarmers();
         $aggregate->warmUp(self::$cacheDir);
     }
@@ -64,7 +64,7 @@ class CacheWarmerAggregateTest extends TestCase
             ->expects($this->never())
             ->method('warmUp');
 
-        $aggregate = new CacheWarmerAggregate(array($warmer));
+        $aggregate = new CacheWarmerAggregate([$warmer]);
         $aggregate->warmUp(self::$cacheDir);
     }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
index 4ce3670a30..c260727849 100644
--- a/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/ClientTest.php
@@ -70,7 +70,7 @@ class ClientTest extends TestCase
         $response->headers->setCookie($cookie2 = new Cookie('foo1', 'bar1', \DateTime::createFromFormat('j-M-Y H:i:s T', '15-Feb-2009 20:00:00 GMT')->format('U'), '/foo', 'http://example.com', true, true, false, null));
         $domResponse = $m->invoke($client, $response);
         $this->assertSame((string) $cookie1, $domResponse->getHeader('Set-Cookie'));
-        $this->assertSame(array((string) $cookie1, (string) $cookie2), $domResponse->getHeader('Set-Cookie', false));
+        $this->assertSame([(string) $cookie1, (string) $cookie2], $domResponse->getHeader('Set-Cookie', false));
     }
 
     public function testFilterResponseSupportsStreamedResponses()
@@ -99,14 +99,14 @@ class ClientTest extends TestCase
         $kernel = new TestHttpKernel();
         $client = new Client($kernel);
 
-        $files = array(
-            array('tmp_name' => $source, 'name' => 'original', 'type' => 'mime/original', 'size' => null, 'error' => UPLOAD_ERR_OK),
+        $files = [
+            ['tmp_name' => $source, 'name' => 'original', 'type' => 'mime/original', 'size' => null, 'error' => UPLOAD_ERR_OK],
             new UploadedFile($source, 'original', 'mime/original', UPLOAD_ERR_OK, true),
-        );
+        ];
 
         $file = null;
         foreach ($files as $file) {
-            $client->request('POST', '/', array(), array('foo' => $file));
+            $client->request('POST', '/', [], ['foo' => $file]);
 
             $files = $client->getRequest()->files->all();
 
@@ -130,9 +130,9 @@ class ClientTest extends TestCase
         $kernel = new TestHttpKernel();
         $client = new Client($kernel);
 
-        $file = array('tmp_name' => '', 'name' => '', 'type' => '', 'size' => 0, 'error' => UPLOAD_ERR_NO_FILE);
+        $file = ['tmp_name' => '', 'name' => '', 'type' => '', 'size' => 0, 'error' => UPLOAD_ERR_NO_FILE];
 
-        $client->request('POST', '/', array(), array('foo' => $file));
+        $client->request('POST', '/', [], ['foo' => $file]);
 
         $files = $client->getRequest()->files->all();
 
@@ -149,8 +149,8 @@ class ClientTest extends TestCase
 
         $file = $this
             ->getMockBuilder('Symfony\Component\HttpFoundation\File\UploadedFile')
-            ->setConstructorArgs(array($source, 'original', 'mime/original', UPLOAD_ERR_OK, true))
-            ->setMethods(array('getSize', 'getClientSize'))
+            ->setConstructorArgs([$source, 'original', 'mime/original', UPLOAD_ERR_OK, true])
+            ->setMethods(['getSize', 'getClientSize'])
             ->getMock()
         ;
         /* should be modified when the getClientSize will be removed */
@@ -163,7 +163,7 @@ class ClientTest extends TestCase
             ->will($this->returnValue(INF))
         ;
 
-        $client->request('POST', '/', array(), array($file));
+        $client->request('POST', '/', [], [$file]);
 
         $files = $client->getRequest()->files->all();
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/ServiceValueResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/ServiceValueResolverTest.php
index 0b38af9556..f1915961ff 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/ServiceValueResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolver/ServiceValueResolverTest.php
@@ -23,86 +23,86 @@ class ServiceValueResolverTest extends TestCase
 {
     public function testDoNotSupportWhenControllerDoNotExists()
     {
-        $resolver = new ServiceValueResolver(new ServiceLocator(array()));
+        $resolver = new ServiceValueResolver(new ServiceLocator([]));
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
-        $request = $this->requestWithAttributes(array('_controller' => 'my_controller'));
+        $request = $this->requestWithAttributes(['_controller' => 'my_controller']);
 
         $this->assertFalse($resolver->supports($request, $argument));
     }
 
     public function testExistingController()
     {
-        $resolver = new ServiceValueResolver(new ServiceLocator(array(
+        $resolver = new ServiceValueResolver(new ServiceLocator([
             'App\\Controller\\Mine::method' => function () {
-                return new ServiceLocator(array(
+                return new ServiceLocator([
                     'dummy' => function () {
                         return new DummyService();
                     },
-                ));
+                ]);
             },
-        )));
+        ]));
 
-        $request = $this->requestWithAttributes(array('_controller' => 'App\\Controller\\Mine::method'));
+        $request = $this->requestWithAttributes(['_controller' => 'App\\Controller\\Mine::method']);
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
 
         $this->assertTrue($resolver->supports($request, $argument));
-        $this->assertYieldEquals(array(new DummyService()), $resolver->resolve($request, $argument));
+        $this->assertYieldEquals([new DummyService()], $resolver->resolve($request, $argument));
     }
 
     public function testExistingControllerWithATrailingBackSlash()
     {
-        $resolver = new ServiceValueResolver(new ServiceLocator(array(
+        $resolver = new ServiceValueResolver(new ServiceLocator([
             'App\\Controller\\Mine::method' => function () {
-                return new ServiceLocator(array(
+                return new ServiceLocator([
                     'dummy' => function () {
                         return new DummyService();
                     },
-                ));
+                ]);
             },
-        )));
+        ]));
 
-        $request = $this->requestWithAttributes(array('_controller' => '\\App\\Controller\\Mine::method'));
+        $request = $this->requestWithAttributes(['_controller' => '\\App\\Controller\\Mine::method']);
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
 
         $this->assertTrue($resolver->supports($request, $argument));
-        $this->assertYieldEquals(array(new DummyService()), $resolver->resolve($request, $argument));
+        $this->assertYieldEquals([new DummyService()], $resolver->resolve($request, $argument));
     }
 
     public function testExistingControllerWithMethodNameStartUppercase()
     {
-        $resolver = new ServiceValueResolver(new ServiceLocator(array(
+        $resolver = new ServiceValueResolver(new ServiceLocator([
             'App\\Controller\\Mine::method' => function () {
-                return new ServiceLocator(array(
+                return new ServiceLocator([
                     'dummy' => function () {
                         return new DummyService();
                     },
-                ));
+                ]);
             },
-        )));
-        $request = $this->requestWithAttributes(array('_controller' => 'App\\Controller\\Mine::Method'));
+        ]));
+        $request = $this->requestWithAttributes(['_controller' => 'App\\Controller\\Mine::Method']);
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
 
         $this->assertTrue($resolver->supports($request, $argument));
-        $this->assertYieldEquals(array(new DummyService()), $resolver->resolve($request, $argument));
+        $this->assertYieldEquals([new DummyService()], $resolver->resolve($request, $argument));
     }
 
     public function testControllerNameIsAnArray()
     {
-        $resolver = new ServiceValueResolver(new ServiceLocator(array(
+        $resolver = new ServiceValueResolver(new ServiceLocator([
             'App\\Controller\\Mine::method' => function () {
-                return new ServiceLocator(array(
+                return new ServiceLocator([
                     'dummy' => function () {
                         return new DummyService();
                     },
-                ));
+                ]);
             },
-        )));
+        ]));
 
-        $request = $this->requestWithAttributes(array('_controller' => array('App\\Controller\\Mine', 'method')));
+        $request = $this->requestWithAttributes(['_controller' => ['App\\Controller\\Mine', 'method']]);
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
 
         $this->assertTrue($resolver->supports($request, $argument));
-        $this->assertYieldEquals(array(new DummyService()), $resolver->resolve($request, $argument));
+        $this->assertYieldEquals([new DummyService()], $resolver->resolve($request, $argument));
     }
 
     /**
@@ -119,7 +119,7 @@ class ServiceValueResolverTest extends TestCase
 
         $container->compile();
 
-        $request = $this->requestWithAttributes(array('_controller' => array(DummyController::class, 'index')));
+        $request = $this->requestWithAttributes(['_controller' => [DummyController::class, 'index']]);
         $argument = new ArgumentMetadata('dummy', DummyService::class, false, false, null);
         $container->get('argument_resolver.service')->resolve($request, $argument)->current();
     }
@@ -137,7 +137,7 @@ class ServiceValueResolverTest extends TestCase
 
     private function assertYieldEquals(array $expected, \Generator $generator)
     {
-        $args = array();
+        $args = [];
         foreach ($generator as $arg) {
             $args[] = $arg;
         }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolverTest.php
index bb4e06617e..45aa9ef26a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ArgumentResolverTest.php
@@ -40,33 +40,33 @@ class ArgumentResolverTest extends TestCase
     public function testDefaultState()
     {
         $this->assertEquals(self::$resolver, new ArgumentResolver());
-        $this->assertNotEquals(self::$resolver, new ArgumentResolver(null, array(new RequestAttributeValueResolver())));
+        $this->assertNotEquals(self::$resolver, new ArgumentResolver(null, [new RequestAttributeValueResolver()]));
     }
 
     public function testGetArguments()
     {
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
-        $controller = array(new self(), 'controllerWithFoo');
+        $controller = [new self(), 'controllerWithFoo'];
 
-        $this->assertEquals(array('foo'), self::$resolver->getArguments($request, $controller), '->getArguments() returns an array of arguments for the controller method');
+        $this->assertEquals(['foo'], self::$resolver->getArguments($request, $controller), '->getArguments() returns an array of arguments for the controller method');
     }
 
     public function testGetArgumentsReturnsEmptyArrayWhenNoArguments()
     {
         $request = Request::create('/');
-        $controller = array(new self(), 'controllerWithoutArguments');
+        $controller = [new self(), 'controllerWithoutArguments'];
 
-        $this->assertEquals(array(), self::$resolver->getArguments($request, $controller), '->getArguments() returns an empty array if the method takes no arguments');
+        $this->assertEquals([], self::$resolver->getArguments($request, $controller), '->getArguments() returns an empty array if the method takes no arguments');
     }
 
     public function testGetArgumentsUsesDefaultValue()
     {
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
-        $controller = array(new self(), 'controllerWithFooAndDefaultBar');
+        $controller = [new self(), 'controllerWithFooAndDefaultBar'];
 
-        $this->assertEquals(array('foo', null), self::$resolver->getArguments($request, $controller), '->getArguments() uses default values if present');
+        $this->assertEquals(['foo', null], self::$resolver->getArguments($request, $controller), '->getArguments() uses default values if present');
     }
 
     public function testGetArgumentsOverrideDefaultValueByRequestAttribute()
@@ -74,9 +74,9 @@ class ArgumentResolverTest extends TestCase
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
         $request->attributes->set('bar', 'bar');
-        $controller = array(new self(), 'controllerWithFooAndDefaultBar');
+        $controller = [new self(), 'controllerWithFooAndDefaultBar'];
 
-        $this->assertEquals(array('foo', 'bar'), self::$resolver->getArguments($request, $controller), '->getArguments() overrides default values if provided in the request attributes');
+        $this->assertEquals(['foo', 'bar'], self::$resolver->getArguments($request, $controller), '->getArguments() overrides default values if provided in the request attributes');
     }
 
     public function testGetArgumentsFromClosure()
@@ -85,7 +85,7 @@ class ArgumentResolverTest extends TestCase
         $request->attributes->set('foo', 'foo');
         $controller = function ($foo) {};
 
-        $this->assertEquals(array('foo'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetArgumentsUsesDefaultValueFromClosure()
@@ -94,7 +94,7 @@ class ArgumentResolverTest extends TestCase
         $request->attributes->set('foo', 'foo');
         $controller = function ($foo, $bar = 'bar') {};
 
-        $this->assertEquals(array('foo', 'bar'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', 'bar'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetArgumentsFromInvokableObject()
@@ -103,12 +103,12 @@ class ArgumentResolverTest extends TestCase
         $request->attributes->set('foo', 'foo');
         $controller = new self();
 
-        $this->assertEquals(array('foo', null), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', null], self::$resolver->getArguments($request, $controller));
 
         // Test default bar overridden by request attribute
         $request->attributes->set('bar', 'bar');
 
-        $this->assertEquals(array('foo', 'bar'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', 'bar'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetArgumentsFromFunctionName()
@@ -118,7 +118,7 @@ class ArgumentResolverTest extends TestCase
         $request->attributes->set('foobar', 'foobar');
         $controller = __NAMESPACE__.'\controller_function';
 
-        $this->assertEquals(array('foo', 'foobar'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', 'foobar'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetArgumentsFailsOnUnresolvedValue()
@@ -126,7 +126,7 @@ class ArgumentResolverTest extends TestCase
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
         $request->attributes->set('foobar', 'foobar');
-        $controller = array(new self(), 'controllerWithFooBarFoobar');
+        $controller = [new self(), 'controllerWithFooBarFoobar'];
 
         try {
             self::$resolver->getArguments($request, $controller);
@@ -139,27 +139,27 @@ class ArgumentResolverTest extends TestCase
     public function testGetArgumentsInjectsRequest()
     {
         $request = Request::create('/');
-        $controller = array(new self(), 'controllerWithRequest');
+        $controller = [new self(), 'controllerWithRequest'];
 
-        $this->assertEquals(array($request), self::$resolver->getArguments($request, $controller), '->getArguments() injects the request');
+        $this->assertEquals([$request], self::$resolver->getArguments($request, $controller), '->getArguments() injects the request');
     }
 
     public function testGetArgumentsInjectsExtendingRequest()
     {
         $request = ExtendingRequest::create('/');
-        $controller = array(new self(), 'controllerWithExtendingRequest');
+        $controller = [new self(), 'controllerWithExtendingRequest'];
 
-        $this->assertEquals(array($request), self::$resolver->getArguments($request, $controller), '->getArguments() injects the request when extended');
+        $this->assertEquals([$request], self::$resolver->getArguments($request, $controller), '->getArguments() injects the request when extended');
     }
 
     public function testGetVariadicArguments()
     {
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
-        $request->attributes->set('bar', array('foo', 'bar'));
-        $controller = array(new VariadicController(), 'action');
+        $request->attributes->set('bar', ['foo', 'bar']);
+        $controller = [new VariadicController(), 'action'];
 
-        $this->assertEquals(array('foo', 'foo', 'bar'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', 'foo', 'bar'], self::$resolver->getArguments($request, $controller));
     }
 
     /**
@@ -170,7 +170,7 @@ class ArgumentResolverTest extends TestCase
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
         $request->attributes->set('bar', 'foo');
-        $controller = array(new VariadicController(), 'action');
+        $controller = [new VariadicController(), 'action'];
 
         self::$resolver->getArguments($request, $controller);
     }
@@ -182,7 +182,7 @@ class ArgumentResolverTest extends TestCase
     {
         $factory = new ArgumentMetadataFactory();
         $valueResolver = $this->getMockBuilder(ArgumentValueResolverInterface::class)->getMock();
-        $resolver = new ArgumentResolver($factory, array($valueResolver));
+        $resolver = new ArgumentResolver($factory, [$valueResolver]);
 
         $valueResolver->expects($this->any())->method('supports')->willReturn(true);
         $valueResolver->expects($this->any())->method('resolve')->willReturn('foo');
@@ -190,7 +190,7 @@ class ArgumentResolverTest extends TestCase
         $request = Request::create('/');
         $request->attributes->set('foo', 'foo');
         $request->attributes->set('bar', 'foo');
-        $controller = array($this, 'controllerWithFooAndDefaultBar');
+        $controller = [$this, 'controllerWithFooAndDefaultBar'];
         $resolver->getArguments($request, $controller);
     }
 
@@ -200,7 +200,7 @@ class ArgumentResolverTest extends TestCase
     public function testIfExceptionIsThrownWhenMissingAnArgument()
     {
         $request = Request::create('/');
-        $controller = array($this, 'controllerWithFoo');
+        $controller = [$this, 'controllerWithFoo'];
 
         self::$resolver->getArguments($request, $controller);
     }
@@ -211,18 +211,18 @@ class ArgumentResolverTest extends TestCase
         $request->attributes->set('foo', 'foo');
         $request->attributes->set('bar', new \stdClass());
         $request->attributes->set('mandatory', 'mandatory');
-        $controller = array(new NullableController(), 'action');
+        $controller = [new NullableController(), 'action'];
 
-        $this->assertEquals(array('foo', new \stdClass(), 'value', 'mandatory'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals(['foo', new \stdClass(), 'value', 'mandatory'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetNullableArgumentsWithDefaults()
     {
         $request = Request::create('/');
         $request->attributes->set('mandatory', 'mandatory');
-        $controller = array(new NullableController(), 'action');
+        $controller = [new NullableController(), 'action'];
 
-        $this->assertEquals(array(null, null, 'value', 'mandatory'), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals([null, null, 'value', 'mandatory'], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetSessionArguments()
@@ -230,9 +230,9 @@ class ArgumentResolverTest extends TestCase
         $session = new Session(new MockArraySessionStorage());
         $request = Request::create('/');
         $request->setSession($session);
-        $controller = array($this, 'controllerWithSession');
+        $controller = [$this, 'controllerWithSession'];
 
-        $this->assertEquals(array($session), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals([$session], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetSessionArgumentsWithExtendedSession()
@@ -240,9 +240,9 @@ class ArgumentResolverTest extends TestCase
         $session = new ExtendingSession(new MockArraySessionStorage());
         $request = Request::create('/');
         $request->setSession($session);
-        $controller = array($this, 'controllerWithExtendingSession');
+        $controller = [$this, 'controllerWithExtendingSession'];
 
-        $this->assertEquals(array($session), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals([$session], self::$resolver->getArguments($request, $controller));
     }
 
     public function testGetSessionArgumentsWithInterface()
@@ -250,9 +250,9 @@ class ArgumentResolverTest extends TestCase
         $session = $this->getMockBuilder(SessionInterface::class)->getMock();
         $request = Request::create('/');
         $request->setSession($session);
-        $controller = array($this, 'controllerWithSessionInterface');
+        $controller = [$this, 'controllerWithSessionInterface'];
 
-        $this->assertEquals(array($session), self::$resolver->getArguments($request, $controller));
+        $this->assertEquals([$session], self::$resolver->getArguments($request, $controller));
     }
 
     /**
@@ -263,7 +263,7 @@ class ArgumentResolverTest extends TestCase
         $session = $this->getMockBuilder(SessionInterface::class)->getMock();
         $request = Request::create('/');
         $request->setSession($session);
-        $controller = array($this, 'controllerWithExtendingSession');
+        $controller = [$this, 'controllerWithExtendingSession'];
 
         self::$resolver->getArguments($request, $controller);
     }
@@ -276,7 +276,7 @@ class ArgumentResolverTest extends TestCase
         $session = new Session(new MockArraySessionStorage());
         $request = Request::create('/');
         $request->setSession($session);
-        $controller = array($this, 'controllerWithExtendingSession');
+        $controller = [$this, 'controllerWithExtendingSession'];
 
         self::$resolver->getArguments($request, $controller);
     }
@@ -287,7 +287,7 @@ class ArgumentResolverTest extends TestCase
     public function testGetSessionMissMatchOnNull()
     {
         $request = Request::create('/');
-        $controller = array($this, 'controllerWithExtendingSession');
+        $controller = [$this, 'controllerWithExtendingSession'];
 
         self::$resolver->getArguments($request, $controller);
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
index 1a144eee49..61d8bec32a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ContainerControllerResolverTest.php
@@ -137,12 +137,12 @@ class ContainerControllerResolverTest extends ControllerResolverTest
         $container->expects($this->atLeastOnce())
             ->method('getRemovedIds')
             ->with()
-            ->will($this->returnValue(array(ControllerTestService::class => true)))
+            ->will($this->returnValue([ControllerTestService::class => true]))
         ;
 
         $resolver = $this->createControllerResolver(null, $container);
         $request = Request::create('/');
-        $request->attributes->set('_controller', array(ControllerTestService::class, 'action'));
+        $request->attributes->set('_controller', [ControllerTestService::class, 'action']);
 
         $resolver->getController($request);
     }
@@ -165,7 +165,7 @@ class ContainerControllerResolverTest extends ControllerResolverTest
         $container->expects($this->atLeastOnce())
             ->method('getRemovedIds')
             ->with()
-            ->will($this->returnValue(array('app.my_controller' => true)))
+            ->will($this->returnValue(['app.my_controller' => true]))
         ;
 
         $resolver = $this->createControllerResolver(null, $container);
@@ -178,23 +178,23 @@ class ContainerControllerResolverTest extends ControllerResolverTest
     public function getUndefinedControllers()
     {
         $tests = parent::getUndefinedControllers();
-        $tests[0] = array('foo', \InvalidArgumentException::class, 'Controller "foo" does neither exist as service nor as class');
-        $tests[1] = array('oof::bar', \InvalidArgumentException::class, 'Controller "oof" does neither exist as service nor as class');
-        $tests[2] = array(array('oof', 'bar'), \InvalidArgumentException::class, 'Controller "oof" does neither exist as service nor as class');
-        $tests[] = array(
-            array(ControllerTestService::class, 'action'),
+        $tests[0] = ['foo', \InvalidArgumentException::class, 'Controller "foo" does neither exist as service nor as class'];
+        $tests[1] = ['oof::bar', \InvalidArgumentException::class, 'Controller "oof" does neither exist as service nor as class'];
+        $tests[2] = [['oof', 'bar'], \InvalidArgumentException::class, 'Controller "oof" does neither exist as service nor as class'];
+        $tests[] = [
+            [ControllerTestService::class, 'action'],
             \InvalidArgumentException::class,
             'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
-        );
-        $tests[] = array(
+        ];
+        $tests[] = [
             ControllerTestService::class.'::action',
             \InvalidArgumentException::class, 'Controller "Symfony\Component\HttpKernel\Tests\Controller\ControllerTestService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
-        );
-        $tests[] = array(
+        ];
+        $tests[] = [
             InvokableControllerService::class,
             \InvalidArgumentException::class,
             'Controller "Symfony\Component\HttpKernel\Tests\Controller\InvokableControllerService" has required constructor arguments and does not exist in the container. Did you forget to define such a service?',
-        );
+        ];
 
         return $tests;
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
index fe624f7b60..1ba7e9e20a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
@@ -55,9 +55,9 @@ class ControllerResolverTest extends TestCase
         $object = new ControllerTest();
 
         $request = Request::create('/');
-        $request->attributes->set('_controller', array($object, 'publicAction'));
+        $request->attributes->set('_controller', [$object, 'publicAction']);
         $controller = $resolver->getController($request);
-        $this->assertSame(array($object, 'publicAction'), $controller);
+        $this->assertSame([$object, 'publicAction'], $controller);
     }
 
     public function testGetControllerWithClassAndMethodAsArray()
@@ -65,7 +65,7 @@ class ControllerResolverTest extends TestCase
         $resolver = $this->createControllerResolver();
 
         $request = Request::create('/');
-        $request->attributes->set('_controller', array(ControllerTest::class, 'publicAction'));
+        $request->attributes->set('_controller', [ControllerTest::class, 'publicAction']);
         $controller = $resolver->getController($request);
         $this->assertInstanceOf(ControllerTest::class, $controller[0]);
         $this->assertSame('publicAction', $controller[1]);
@@ -145,12 +145,12 @@ class ControllerResolverTest extends TestCase
 
     public function getStaticControllers()
     {
-        return array(
-            array(TestAbstractController::class.'::staticAction', 'foo'),
-            array(array(TestAbstractController::class, 'staticAction'), 'foo'),
-            array(PrivateConstructorController::class.'::staticAction', 'bar'),
-            array(array(PrivateConstructorController::class, 'staticAction'), 'bar'),
-        );
+        return [
+            [TestAbstractController::class.'::staticAction', 'foo'],
+            [[TestAbstractController::class, 'staticAction'], 'foo'],
+            [PrivateConstructorController::class.'::staticAction', 'bar'],
+            [[PrivateConstructorController::class, 'staticAction'], 'bar'],
+        ];
     }
 
     /**
@@ -175,22 +175,22 @@ class ControllerResolverTest extends TestCase
     {
         $controller = new ControllerTest();
 
-        return array(
-            array('foo', \Error::class, 'Class \'foo\' not found'),
-            array('oof::bar', \Error::class, 'Class \'oof\' not found'),
-            array(array('oof', 'bar'), \Error::class, 'Class \'oof\' not found'),
-            array('Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::staticsAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "staticsAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest", did you mean "staticAction"?'),
-            array('Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::privateAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "privateAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'),
-            array('Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::protectedAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "protectedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'),
-            array('Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::undefinedAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "undefinedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest". Available methods: "publicAction", "staticAction"'),
-            array('Symfony\Component\HttpKernel\Tests\Controller\ControllerTest', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Controller class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" cannot be called without a method name. You need to implement "__invoke" or use one of the available methods: "publicAction", "staticAction".'),
-            array(array($controller, 'staticsAction'), \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "staticsAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest", did you mean "staticAction"?'),
-            array(array($controller, 'privateAction'), \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "privateAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'),
-            array(array($controller, 'protectedAction'), \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "protectedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'),
-            array(array($controller, 'undefinedAction'), \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "undefinedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest". Available methods: "publicAction", "staticAction"'),
-            array($controller, \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Controller class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" cannot be called without a method name. You need to implement "__invoke" or use one of the available methods: "publicAction", "staticAction".'),
-            array(array('a' => 'foo', 'b' => 'bar'), \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Invalid array callable, expected array(controller, method).'),
-        );
+        return [
+            ['foo', \Error::class, 'Class \'foo\' not found'],
+            ['oof::bar', \Error::class, 'Class \'oof\' not found'],
+            [['oof', 'bar'], \Error::class, 'Class \'oof\' not found'],
+            ['Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::staticsAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "staticsAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest", did you mean "staticAction"?'],
+            ['Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::privateAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "privateAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'],
+            ['Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::protectedAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "protectedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'],
+            ['Symfony\Component\HttpKernel\Tests\Controller\ControllerTest::undefinedAction', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "undefinedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest". Available methods: "publicAction", "staticAction"'],
+            ['Symfony\Component\HttpKernel\Tests\Controller\ControllerTest', \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Controller class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" cannot be called without a method name. You need to implement "__invoke" or use one of the available methods: "publicAction", "staticAction".'],
+            [[$controller, 'staticsAction'], \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "staticsAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest", did you mean "staticAction"?'],
+            [[$controller, 'privateAction'], \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "privateAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'],
+            [[$controller, 'protectedAction'], \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Method "protectedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" should be public and non-abstract'],
+            [[$controller, 'undefinedAction'], \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Expected method "undefinedAction" on class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest". Available methods: "publicAction", "staticAction"'],
+            [$controller, \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Controller class "Symfony\Component\HttpKernel\Tests\Controller\ControllerTest" cannot be called without a method name. You need to implement "__invoke" or use one of the available methods: "publicAction", "staticAction".'],
+            [['a' => 'foo', 'b' => 'bar'], \InvalidArgumentException::class, 'The controller for URI "/" is not callable. Invalid array callable, expected [controller, method].'],
+        ];
     }
 
     protected function createControllerResolver(LoggerInterface $logger = null)
diff --git a/src/Symfony/Component/HttpKernel/Tests/ControllerMetadata/ArgumentMetadataFactoryTest.php b/src/Symfony/Component/HttpKernel/Tests/ControllerMetadata/ArgumentMetadataFactoryTest.php
index a667705f50..199d3a0e4b 100644
--- a/src/Symfony/Component/HttpKernel/Tests/ControllerMetadata/ArgumentMetadataFactoryTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/ControllerMetadata/ArgumentMetadataFactoryTest.php
@@ -33,88 +33,88 @@ class ArgumentMetadataFactoryTest extends TestCase
 
     public function testSignature1()
     {
-        $arguments = $this->factory->createArgumentMetadata(array($this, 'signature1'));
+        $arguments = $this->factory->createArgumentMetadata([$this, 'signature1']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', self::class, false, false, null),
             new ArgumentMetadata('bar', 'array', false, false, null),
             new ArgumentMetadata('baz', 'callable', false, false, null),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testSignature2()
     {
-        $arguments = $this->factory->createArgumentMetadata(array($this, 'signature2'));
+        $arguments = $this->factory->createArgumentMetadata([$this, 'signature2']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', self::class, false, true, null, true),
             new ArgumentMetadata('bar', __NAMESPACE__.'\FakeClassThatDoesNotExist', false, true, null, true),
             new ArgumentMetadata('baz', 'Fake\ImportedAndFake', false, true, null, true),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testSignature3()
     {
-        $arguments = $this->factory->createArgumentMetadata(array($this, 'signature3'));
+        $arguments = $this->factory->createArgumentMetadata([$this, 'signature3']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('bar', __NAMESPACE__.'\FakeClassThatDoesNotExist', false, false, null),
             new ArgumentMetadata('baz', 'Fake\ImportedAndFake', false, false, null),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testSignature4()
     {
-        $arguments = $this->factory->createArgumentMetadata(array($this, 'signature4'));
+        $arguments = $this->factory->createArgumentMetadata([$this, 'signature4']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', null, false, true, 'default'),
             new ArgumentMetadata('bar', null, false, true, 500),
-            new ArgumentMetadata('baz', null, false, true, array()),
-        ), $arguments);
+            new ArgumentMetadata('baz', null, false, true, []),
+        ], $arguments);
     }
 
     public function testSignature5()
     {
-        $arguments = $this->factory->createArgumentMetadata(array($this, 'signature5'));
+        $arguments = $this->factory->createArgumentMetadata([$this, 'signature5']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', 'array', false, true, null, true),
             new ArgumentMetadata('bar', null, false, false, null),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testVariadicSignature()
     {
-        $arguments = $this->factory->createArgumentMetadata(array(new VariadicController(), 'action'));
+        $arguments = $this->factory->createArgumentMetadata([new VariadicController(), 'action']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', null, false, false, null),
             new ArgumentMetadata('bar', null, true, false, null),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testBasicTypesSignature()
     {
-        $arguments = $this->factory->createArgumentMetadata(array(new BasicTypesController(), 'action'));
+        $arguments = $this->factory->createArgumentMetadata([new BasicTypesController(), 'action']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', 'string', false, false, null),
             new ArgumentMetadata('bar', 'int', false, false, null),
             new ArgumentMetadata('baz', 'float', false, false, null),
-        ), $arguments);
+        ], $arguments);
     }
 
     public function testNullableTypesSignature()
     {
-        $arguments = $this->factory->createArgumentMetadata(array(new NullableController(), 'action'));
+        $arguments = $this->factory->createArgumentMetadata([new NullableController(), 'action']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new ArgumentMetadata('foo', 'string', false, false, null, true),
             new ArgumentMetadata('bar', \stdClass::class, false, false, null, true),
             new ArgumentMetadata('baz', 'string', false, true, 'value', true),
             new ArgumentMetadata('mandatory', null, false, false, null, true),
-        ), $arguments);
+        ], $arguments);
     }
 
     private function signature1(self $foo, array $bar, callable $baz)
@@ -129,7 +129,7 @@ class ArgumentMetadataFactoryTest extends TestCase
     {
     }
 
-    private function signature4($foo = 'default', $bar = 500, $baz = array())
+    private function signature4($foo = 'default', $bar = 500, $baz = [])
     {
     }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
index 10b0585840..add100d47b 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/ConfigDataCollectorTest.php
@@ -67,7 +67,7 @@ class KernelForTest extends Kernel
 
     public function getBundles()
     {
-        return array();
+        return [];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DataCollectorTest.php
index 54fd39e0d8..ae79a3c93c 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DataCollectorTest.php
@@ -30,7 +30,7 @@ class DataCollectorTest extends TestCase
 
     public function testCloneVarExistingFilePath()
     {
-        $c = new CloneVarDataCollector(array($filePath = tempnam(sys_get_temp_dir(), 'clone_var_data_collector_')));
+        $c = new CloneVarDataCollector([$filePath = tempnam(sys_get_temp_dir(), 'clone_var_data_collector_')]);
         $c->collect(new Request(), new Response());
 
         $this->assertSame($filePath, $c->getData()[0]);
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
index 0f46709049..76c1d96dcc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/DumpDataCollectorTest.php
@@ -26,7 +26,7 @@ class DumpDataCollectorTest extends TestCase
 {
     public function testDump()
     {
-        $data = new Data(array(array(123)));
+        $data = new Data([[123]]);
 
         $collector = new DumpDataCollector();
 
@@ -41,15 +41,15 @@ class DumpDataCollectorTest extends TestCase
         $dump[0]['data'] = preg_replace('/^.*?<pre/', '<pre', $dump[0]['data']);
         $dump[0]['data'] = preg_replace('/sf-dump-\d+/', 'sf-dump', $dump[0]['data']);
 
-        $xDump = array(
-            array(
+        $xDump = [
+            [
                 'data' => "<pre class=sf-dump id=sf-dump data-indent-pad=\"  \"><span class=sf-dump-num>123</span>\n</pre><script>Sfdump(\"sf-dump\")</script>\n",
                 'name' => 'DumpDataCollectorTest.php',
                 'file' => __FILE__,
                 'line' => $line,
                 'fileExcerpt' => false,
-            ),
-        );
+            ],
+        ];
         $this->assertEquals($xDump, $dump);
 
         $this->assertStringMatchesFormat('a:3:{i:0;a:5:{s:4:"data";%c:39:"Symfony\Component\VarDumper\Cloner\Data":%a', $collector->serialize());
@@ -59,7 +59,7 @@ class DumpDataCollectorTest extends TestCase
 
     public function testDumpWithServerConnection()
     {
-        $data = new Data(array(array(123)));
+        $data = new Data([[123]]);
 
         // Server is up, server dumper is used
         $serverDumper = $this->getMockBuilder(Connection::class)->disableOriginalConstructor()->getMock();
@@ -77,7 +77,7 @@ class DumpDataCollectorTest extends TestCase
 
     public function testCollectDefault()
     {
-        $data = new Data(array(array(123)));
+        $data = new Data([[123]]);
 
         $collector = new DumpDataCollector();
 
@@ -95,7 +95,7 @@ class DumpDataCollectorTest extends TestCase
 
     public function testCollectHtml()
     {
-        $data = new Data(array(array(123)));
+        $data = new Data([[123]]);
 
         $collector = new DumpDataCollector(null, 'test://%f:%l');
 
@@ -123,7 +123,7 @@ EOTXT;
 
     public function testFlush()
     {
-        $data = new Data(array(array(456)));
+        $data = new Data([[456]]);
         $collector = new DumpDataCollector();
         $collector->dump($data);
         $line = __LINE__ - 1;
@@ -136,7 +136,7 @@ EOTXT;
 
     public function testFlushNothingWhenDataDumperIsProvided()
     {
-        $data = new Data(array(array(456)));
+        $data = new Data([[456]]);
         $dumper = new CliDumper('php://output');
         $collector = new DumpDataCollector(null, null, null, null, $dumper);
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
index b5c7057fd6..e0bcc24bd7 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/LoggerDataCollectorTest.php
@@ -25,24 +25,24 @@ class LoggerDataCollectorTest extends TestCase
     {
         $logger = $this
             ->getMockBuilder('Symfony\Component\HttpKernel\Log\DebugLoggerInterface')
-            ->setMethods(array('countErrors', 'getLogs', 'clear'))
+            ->setMethods(['countErrors', 'getLogs', 'clear'])
             ->getMock();
         $logger->expects($this->once())->method('countErrors')->will($this->returnValue('foo'));
-        $logger->expects($this->exactly(2))->method('getLogs')->will($this->returnValue(array()));
+        $logger->expects($this->exactly(2))->method('getLogs')->will($this->returnValue([]));
 
         $c = new LoggerDataCollector($logger, __DIR__.'/');
         $c->lateCollect();
         $compilerLogs = $c->getCompilerLogs()->getValue('message');
 
-        $this->assertSame(array(
-            array('message' => 'Removed service "Psr\Container\ContainerInterface"; reason: private alias.'),
-            array('message' => 'Removed service "Symfony\Component\DependencyInjection\ContainerInterface"; reason: private alias.'),
-        ), $compilerLogs['Symfony\Component\DependencyInjection\Compiler\RemovePrivateAliasesPass']);
+        $this->assertSame([
+            ['message' => 'Removed service "Psr\Container\ContainerInterface"; reason: private alias.'],
+            ['message' => 'Removed service "Symfony\Component\DependencyInjection\ContainerInterface"; reason: private alias.'],
+        ], $compilerLogs['Symfony\Component\DependencyInjection\Compiler\RemovePrivateAliasesPass']);
 
-        $this->assertSame(array(
-            array('message' => 'Some custom logging message'),
-            array('message' => 'With ending :'),
-        ), $compilerLogs['Unknown Compiler Pass']);
+        $this->assertSame([
+            ['message' => 'Some custom logging message'],
+            ['message' => 'With ending :'],
+        ], $compilerLogs['Unknown Compiler Pass']);
     }
 
     public function testWithMasterRequest()
@@ -53,10 +53,10 @@ class LoggerDataCollectorTest extends TestCase
 
         $logger = $this
             ->getMockBuilder(DebugLoggerInterface::class)
-            ->setMethods(array('countErrors', 'getLogs', 'clear'))
+            ->setMethods(['countErrors', 'getLogs', 'clear'])
             ->getMock();
         $logger->expects($this->once())->method('countErrors')->with(null);
-        $logger->expects($this->exactly(2))->method('getLogs')->with(null)->will($this->returnValue(array()));
+        $logger->expects($this->exactly(2))->method('getLogs')->with(null)->will($this->returnValue([]));
 
         $c = new LoggerDataCollector($logger, __DIR__.'/', $stack);
 
@@ -74,10 +74,10 @@ class LoggerDataCollectorTest extends TestCase
 
         $logger = $this
             ->getMockBuilder(DebugLoggerInterface::class)
-            ->setMethods(array('countErrors', 'getLogs', 'clear'))
+            ->setMethods(['countErrors', 'getLogs', 'clear'])
             ->getMock();
         $logger->expects($this->once())->method('countErrors')->with($subRequest);
-        $logger->expects($this->exactly(2))->method('getLogs')->with($subRequest)->will($this->returnValue(array()));
+        $logger->expects($this->exactly(2))->method('getLogs')->with($subRequest)->will($this->returnValue([]));
 
         $c = new LoggerDataCollector($logger, __DIR__.'/', $stack);
 
@@ -92,7 +92,7 @@ class LoggerDataCollectorTest extends TestCase
     {
         $logger = $this
             ->getMockBuilder('Symfony\Component\HttpKernel\Log\DebugLoggerInterface')
-            ->setMethods(array('countErrors', 'getLogs', 'clear'))
+            ->setMethods(['countErrors', 'getLogs', 'clear'])
             ->getMock();
         $logger->expects($this->once())->method('countErrors')->will($this->returnValue($nb));
         $logger->expects($this->exactly(2))->method('getLogs')->will($this->returnValue($logs));
@@ -106,7 +106,7 @@ class LoggerDataCollectorTest extends TestCase
         $logs = array_map(function ($v) {
             if (isset($v['context']['exception'])) {
                 $e = &$v['context']['exception'];
-                $e = isset($e["\0*\0message"]) ? array($e["\0*\0message"], $e["\0*\0severity"]) : array($e["\0Symfony\Component\Debug\Exception\SilencedErrorContext\0severity"]);
+                $e = isset($e["\0*\0message"]) ? [$e["\0*\0message"], $e["\0*\0severity"]] : [$e["\0Symfony\Component\Debug\Exception\SilencedErrorContext\0severity"]];
             }
 
             return $v;
@@ -124,7 +124,7 @@ class LoggerDataCollectorTest extends TestCase
     {
         $logger = $this
             ->getMockBuilder('Symfony\Component\HttpKernel\Log\DebugLoggerInterface')
-            ->setMethods(array('countErrors', 'getLogs', 'clear'))
+            ->setMethods(['countErrors', 'getLogs', 'clear'])
             ->getMock();
         $logger->expects($this->once())->method('clear');
 
@@ -134,55 +134,55 @@ class LoggerDataCollectorTest extends TestCase
 
     public function getCollectTestData()
     {
-        yield 'simple log' => array(
+        yield 'simple log' => [
             1,
-            array(array('message' => 'foo', 'context' => array(), 'priority' => 100, 'priorityName' => 'DEBUG')),
-            array(array('message' => 'foo', 'context' => array(), 'priority' => 100, 'priorityName' => 'DEBUG')),
+            [['message' => 'foo', 'context' => [], 'priority' => 100, 'priorityName' => 'DEBUG']],
+            [['message' => 'foo', 'context' => [], 'priority' => 100, 'priorityName' => 'DEBUG']],
             0,
             0,
-        );
+        ];
 
-        yield 'log with a context' => array(
+        yield 'log with a context' => [
             1,
-            array(array('message' => 'foo', 'context' => array('foo' => 'bar'), 'priority' => 100, 'priorityName' => 'DEBUG')),
-            array(array('message' => 'foo', 'context' => array('foo' => 'bar'), 'priority' => 100, 'priorityName' => 'DEBUG')),
+            [['message' => 'foo', 'context' => ['foo' => 'bar'], 'priority' => 100, 'priorityName' => 'DEBUG']],
+            [['message' => 'foo', 'context' => ['foo' => 'bar'], 'priority' => 100, 'priorityName' => 'DEBUG']],
             0,
             0,
-        );
+        ];
 
         if (!class_exists(SilencedErrorContext::class)) {
             return;
         }
 
-        yield 'logs with some deprecations' => array(
+        yield 'logs with some deprecations' => [
             1,
-            array(
-                array('message' => 'foo3', 'context' => array('exception' => new \ErrorException('warning', 0, E_USER_WARNING)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-                array('message' => 'foo', 'context' => array('exception' => new \ErrorException('deprecated', 0, E_DEPRECATED)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-                array('message' => 'foo2', 'context' => array('exception' => new \ErrorException('deprecated', 0, E_USER_DEPRECATED)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-            ),
-            array(
-                array('message' => 'foo3', 'context' => array('exception' => array('warning', E_USER_WARNING)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-                array('message' => 'foo', 'context' => array('exception' => array('deprecated', E_DEPRECATED)), 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => false),
-                array('message' => 'foo2', 'context' => array('exception' => array('deprecated', E_USER_DEPRECATED)), 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => false),
-            ),
+            [
+                ['message' => 'foo3', 'context' => ['exception' => new \ErrorException('warning', 0, E_USER_WARNING)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => 'foo', 'context' => ['exception' => new \ErrorException('deprecated', 0, E_DEPRECATED)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => 'foo2', 'context' => ['exception' => new \ErrorException('deprecated', 0, E_USER_DEPRECATED)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+            ],
+            [
+                ['message' => 'foo3', 'context' => ['exception' => ['warning', E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => 'foo', 'context' => ['exception' => ['deprecated', E_DEPRECATED]], 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => false],
+                ['message' => 'foo2', 'context' => ['exception' => ['deprecated', E_USER_DEPRECATED]], 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => false],
+            ],
             2,
             0,
-            array(100 => array('count' => 3, 'name' => 'DEBUG')),
-        );
+            [100 => ['count' => 3, 'name' => 'DEBUG']],
+        ];
 
-        yield 'logs with some silent errors' => array(
+        yield 'logs with some silent errors' => [
             1,
-            array(
-                array('message' => 'foo3', 'context' => array('exception' => new \ErrorException('warning', 0, E_USER_WARNING)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-                array('message' => 'foo3', 'context' => array('exception' => new SilencedErrorContext(E_USER_WARNING, __FILE__, __LINE__)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-            ),
-            array(
-                array('message' => 'foo3', 'context' => array('exception' => array('warning', E_USER_WARNING)), 'priority' => 100, 'priorityName' => 'DEBUG'),
-                array('message' => 'foo3', 'context' => array('exception' => array(E_USER_WARNING)), 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => true),
-            ),
+            [
+                ['message' => 'foo3', 'context' => ['exception' => new \ErrorException('warning', 0, E_USER_WARNING)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => 'foo3', 'context' => ['exception' => new SilencedErrorContext(E_USER_WARNING, __FILE__, __LINE__)], 'priority' => 100, 'priorityName' => 'DEBUG'],
+            ],
+            [
+                ['message' => 'foo3', 'context' => ['exception' => ['warning', E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG'],
+                ['message' => 'foo3', 'context' => ['exception' => [E_USER_WARNING]], 'priority' => 100, 'priorityName' => 'DEBUG', 'errorCount' => 1, 'scream' => true],
+            ],
             0,
             1,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
index 1435d05e83..c434ed1e11 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/MemoryDataCollectorTest.php
@@ -39,21 +39,21 @@ class MemoryDataCollectorTest extends TestCase
 
     public function getBytesConversionTestData()
     {
-        return array(
-            array('2k', 2048),
-            array('2 k', 2048),
-            array('8m', 8 * 1024 * 1024),
-            array('+2 k', 2048),
-            array('+2???k', 2048),
-            array('0x10', 16),
-            array('0xf', 15),
-            array('010', 8),
-            array('+0x10 k', 16 * 1024),
-            array('1g', 1024 * 1024 * 1024),
-            array('1G', 1024 * 1024 * 1024),
-            array('-1', -1),
-            array('0', 0),
-            array('2mk', 2048), // the unit must be the last char, so in this case 'k', not 'm'
-        );
+        return [
+            ['2k', 2048],
+            ['2 k', 2048],
+            ['8m', 8 * 1024 * 1024],
+            ['+2 k', 2048],
+            ['+2???k', 2048],
+            ['0x10', 16],
+            ['0xf', 15],
+            ['010', 8],
+            ['+0x10 k', 16 * 1024],
+            ['1g', 1024 * 1024 * 1024],
+            ['1G', 1024 * 1024 * 1024],
+            ['-1', -1],
+            ['0', 0],
+            ['2mk', 2048], // the unit must be the last char, so in this case 'k', not 'm'
+        ];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php b/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
index 24904f7cca..b5541610f6 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DataCollector/RequestDataCollectorTest.php
@@ -48,8 +48,8 @@ class RequestDataCollectorTest extends TestCase
         $this->assertInstanceOf(ParameterBag::class, $c->getResponseCookies());
         $this->assertSame('html', $c->getFormat());
         $this->assertEquals('foobar', $c->getRoute());
-        $this->assertEquals(array('name' => 'foo'), $c->getRouteParams());
-        $this->assertSame(array(), $c->getSessionAttributes());
+        $this->assertEquals(['name' => 'foo'], $c->getRouteParams());
+        $this->assertSame([], $c->getSessionAttributes());
         $this->assertSame('en', $c->getLocale());
         $this->assertContains(__FILE__, $attributes->get('resource'));
         $this->assertSame('stdClass', $attributes->get('object')->getType());
@@ -62,13 +62,13 @@ class RequestDataCollectorTest extends TestCase
 
     public function testCollectWithoutRouteParams()
     {
-        $request = $this->createRequest(array());
+        $request = $this->createRequest([]);
 
         $c = new RequestDataCollector();
         $c->collect($request, $this->createResponse());
         $c->lateCollect();
 
-        $this->assertEquals(array(), $c->getRouteParams());
+        $this->assertEquals([], $c->getRouteParams());
     }
 
     /**
@@ -94,95 +94,95 @@ class RequestDataCollectorTest extends TestCase
         $r3 = new \ReflectionClass($this);
 
         // test name, callable, expected
-        return array(
-            array(
+        return [
+            [
                 '"Regular" callable',
-                array($this, 'testControllerInspection'),
-                array(
+                [$this, 'testControllerInspection'],
+                [
                     'class' => __NAMESPACE__.'\RequestDataCollectorTest',
                     'method' => 'testControllerInspection',
                     'file' => __FILE__,
                     'line' => $r1->getStartLine(),
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Closure',
                 function () { return 'foo'; },
-                array(
+                [
                     'class' => __NAMESPACE__.'\{closure}',
                     'method' => null,
                     'file' => __FILE__,
                     'line' => __LINE__ - 5,
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Static callback as string',
                 __NAMESPACE__.'\RequestDataCollectorTest::staticControllerMethod',
-                array(
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => 'staticControllerMethod',
                     'file' => __FILE__,
                     'line' => $r2->getStartLine(),
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Static callable with instance',
-                array($this, 'staticControllerMethod'),
-                array(
+                [$this, 'staticControllerMethod'],
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => 'staticControllerMethod',
                     'file' => __FILE__,
                     'line' => $r2->getStartLine(),
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Static callable with class name',
-                array('Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest', 'staticControllerMethod'),
-                array(
+                ['Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest', 'staticControllerMethod'],
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => 'staticControllerMethod',
                     'file' => __FILE__,
                     'line' => $r2->getStartLine(),
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Callable with instance depending on __call()',
-                array($this, 'magicMethod'),
-                array(
+                [$this, 'magicMethod'],
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => 'magicMethod',
                     'file' => 'n/a',
                     'line' => 'n/a',
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Callable with class name depending on __callStatic()',
-                array('Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest', 'magicMethod'),
-                array(
+                ['Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest', 'magicMethod'],
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => 'magicMethod',
                     'file' => 'n/a',
                     'line' => 'n/a',
-                ),
-            ),
+                ],
+            ],
 
-            array(
+            [
                 'Invokable controller',
                 $this,
-                array(
+                [
                     'class' => 'Symfony\Component\HttpKernel\Tests\DataCollector\RequestDataCollectorTest',
                     'method' => null,
                     'file' => __FILE__,
                     'line' => $r3->getStartLine(),
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
     }
 
     public function testItIgnoresInvalidCallables()
@@ -199,9 +199,9 @@ class RequestDataCollectorTest extends TestCase
     public function testItAddsRedirectedAttributesWhenRequestContainsSpecificCookie()
     {
         $request = $this->createRequest();
-        $request->cookies->add(array(
+        $request->cookies->add([
             'sf_redirect' => '{}',
-        ));
+        ]);
 
         $kernel = $this->getMockBuilder(HttpKernelInterface::class)->getMock();
 
@@ -235,9 +235,9 @@ class RequestDataCollectorTest extends TestCase
 
         $request = $this->createRequest();
         $request->attributes->set('_redirected', true);
-        $request->cookies->add(array(
+        $request->cookies->add([
             'sf_redirect' => '{"method": "POST"}',
-        ));
+        ]);
 
         $c->collect($request, $response = $this->createResponse());
         $c->lateCollect();
@@ -248,7 +248,7 @@ class RequestDataCollectorTest extends TestCase
         $this->assertNull($cookie->getValue());
     }
 
-    protected function createRequest($routeParams = array('name' => 'foo'))
+    protected function createRequest($routeParams = ['name' => 'foo'])
     {
         $request = Request::create('http://test.com/foo?bar=baz');
         $request->attributes->set('foo', 'bar');
diff --git a/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php b/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
index 3de147c7f7..8b8e91aeb4 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Debug/TraceableEventDispatcherTest.php
@@ -31,7 +31,7 @@ class TraceableEventDispatcherTest extends TestCase
         $kernel->terminate($request, $response);
 
         $events = $stopwatch->getSectionEvents($response->headers->get('X-Debug-Token'));
-        $this->assertEquals(array(
+        $this->assertEquals([
             '__section__',
             'kernel.request',
             'kernel.controller',
@@ -39,13 +39,13 @@ class TraceableEventDispatcherTest extends TestCase
             'controller',
             'kernel.response',
             'kernel.terminate',
-        ), array_keys($events));
+        ], array_keys($events));
     }
 
     public function testStopwatchCheckControllerOnRequestEvent()
     {
         $stopwatch = $this->getMockBuilder('Symfony\Component\Stopwatch\Stopwatch')
-            ->setMethods(array('isStarted'))
+            ->setMethods(['isStarted'])
             ->getMock();
         $stopwatch->expects($this->once())
             ->method('isStarted')
@@ -61,7 +61,7 @@ class TraceableEventDispatcherTest extends TestCase
     public function testStopwatchStopControllerOnRequestEvent()
     {
         $stopwatch = $this->getMockBuilder('Symfony\Component\Stopwatch\Stopwatch')
-            ->setMethods(array('isStarted', 'stop', 'stopSection'))
+            ->setMethods(['isStarted', 'stop', 'stopSection'])
             ->getMock();
         $stopwatch->expects($this->once())
             ->method('isStarted')
@@ -114,7 +114,7 @@ class TraceableEventDispatcherTest extends TestCase
         $controllerResolver = $this->getMockBuilder('Symfony\Component\HttpKernel\Controller\ControllerResolverInterface')->getMock();
         $controllerResolver->expects($this->once())->method('getController')->will($this->returnValue($controller));
         $argumentResolver = $this->getMockBuilder('Symfony\Component\HttpKernel\Controller\ArgumentResolverInterface')->getMock();
-        $argumentResolver->expects($this->once())->method('getArguments')->will($this->returnValue(array()));
+        $argumentResolver->expects($this->once())->method('getArguments')->will($this->returnValue([]));
 
         return new HttpKernel($dispatcher, $controllerResolver, new RequestStack(), $argumentResolver);
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/AddAnnotatedClassesToCachePassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/AddAnnotatedClassesToCachePassTest.php
index a2fb6afca4..914b1dd8d6 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/AddAnnotatedClassesToCachePassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/AddAnnotatedClassesToCachePassTest.php
@@ -24,76 +24,76 @@ class AddAnnotatedClassesToCachePassTest extends TestCase
         $r->setAccessible(true);
         $expand = $r->getClosure($pass);
 
-        $this->assertSame('Foo', $expand(array('Foo'), array())[0]);
-        $this->assertSame('Foo', $expand(array('\\Foo'), array())[0]);
-        $this->assertSame('Foo', $expand(array('Foo'), array('\\Foo'))[0]);
-        $this->assertSame('Foo', $expand(array('Foo'), array('Foo'))[0]);
-        $this->assertSame('Foo', $expand(array('\\Foo'), array('\\Foo\\Bar'))[0]);
-        $this->assertSame('Foo', $expand(array('Foo'), array('\\Foo\\Bar'))[0]);
-        $this->assertSame('Foo', $expand(array('\\Foo'), array('\\Foo\\Bar\\Acme'))[0]);
+        $this->assertSame('Foo', $expand(['Foo'], [])[0]);
+        $this->assertSame('Foo', $expand(['\\Foo'], [])[0]);
+        $this->assertSame('Foo', $expand(['Foo'], ['\\Foo'])[0]);
+        $this->assertSame('Foo', $expand(['Foo'], ['Foo'])[0]);
+        $this->assertSame('Foo', $expand(['\\Foo'], ['\\Foo\\Bar'])[0]);
+        $this->assertSame('Foo', $expand(['Foo'], ['\\Foo\\Bar'])[0]);
+        $this->assertSame('Foo', $expand(['\\Foo'], ['\\Foo\\Bar\\Acme'])[0]);
 
-        $this->assertSame('Foo\\Bar', $expand(array('Foo\\'), array('\\Foo\\Bar'))[0]);
-        $this->assertSame('Foo\\Bar\\Acme', $expand(array('Foo\\'), array('\\Foo\\Bar\\Acme'))[0]);
-        $this->assertEmpty($expand(array('Foo\\'), array('\\Foo')));
+        $this->assertSame('Foo\\Bar', $expand(['Foo\\'], ['\\Foo\\Bar'])[0]);
+        $this->assertSame('Foo\\Bar\\Acme', $expand(['Foo\\'], ['\\Foo\\Bar\\Acme'])[0]);
+        $this->assertEmpty($expand(['Foo\\'], ['\\Foo']));
 
-        $this->assertSame('Acme\\Foo\\Bar', $expand(array('**\\Foo\\'), array('\\Acme\\Foo\\Bar'))[0]);
-        $this->assertEmpty($expand(array('**\\Foo\\'), array('\\Foo\\Bar')));
-        $this->assertEmpty($expand(array('**\\Foo\\'), array('\\Acme\\Foo')));
-        $this->assertEmpty($expand(array('**\\Foo\\'), array('\\Foo')));
+        $this->assertSame('Acme\\Foo\\Bar', $expand(['**\\Foo\\'], ['\\Acme\\Foo\\Bar'])[0]);
+        $this->assertEmpty($expand(['**\\Foo\\'], ['\\Foo\\Bar']));
+        $this->assertEmpty($expand(['**\\Foo\\'], ['\\Acme\\Foo']));
+        $this->assertEmpty($expand(['**\\Foo\\'], ['\\Foo']));
 
-        $this->assertSame('Acme\\Foo', $expand(array('**\\Foo'), array('\\Acme\\Foo'))[0]);
-        $this->assertEmpty($expand(array('**\\Foo'), array('\\Acme\\Foo\\AcmeBundle')));
-        $this->assertEmpty($expand(array('**\\Foo'), array('\\Acme\\FooBar\\AcmeBundle')));
+        $this->assertSame('Acme\\Foo', $expand(['**\\Foo'], ['\\Acme\\Foo'])[0]);
+        $this->assertEmpty($expand(['**\\Foo'], ['\\Acme\\Foo\\AcmeBundle']));
+        $this->assertEmpty($expand(['**\\Foo'], ['\\Acme\\FooBar\\AcmeBundle']));
 
-        $this->assertSame('Foo\\Acme\\Bar', $expand(array('Foo\\*\\Bar'), array('\\Foo\\Acme\\Bar'))[0]);
-        $this->assertEmpty($expand(array('Foo\\*\\Bar'), array('\\Foo\\Acme\\Bundle\\Bar')));
+        $this->assertSame('Foo\\Acme\\Bar', $expand(['Foo\\*\\Bar'], ['\\Foo\\Acme\\Bar'])[0]);
+        $this->assertEmpty($expand(['Foo\\*\\Bar'], ['\\Foo\\Acme\\Bundle\\Bar']));
 
-        $this->assertSame('Foo\\Acme\\Bar', $expand(array('Foo\\**\\Bar'), array('\\Foo\\Acme\\Bar'))[0]);
-        $this->assertSame('Foo\\Acme\\Bundle\\Bar', $expand(array('Foo\\**\\Bar'), array('\\Foo\\Acme\\Bundle\\Bar'))[0]);
+        $this->assertSame('Foo\\Acme\\Bar', $expand(['Foo\\**\\Bar'], ['\\Foo\\Acme\\Bar'])[0]);
+        $this->assertSame('Foo\\Acme\\Bundle\\Bar', $expand(['Foo\\**\\Bar'], ['\\Foo\\Acme\\Bundle\\Bar'])[0]);
 
-        $this->assertSame('Acme\\Bar', $expand(array('*\\Bar'), array('\\Acme\\Bar'))[0]);
-        $this->assertEmpty($expand(array('*\\Bar'), array('\\Bar')));
-        $this->assertEmpty($expand(array('*\\Bar'), array('\\Foo\\Acme\\Bar')));
+        $this->assertSame('Acme\\Bar', $expand(['*\\Bar'], ['\\Acme\\Bar'])[0]);
+        $this->assertEmpty($expand(['*\\Bar'], ['\\Bar']));
+        $this->assertEmpty($expand(['*\\Bar'], ['\\Foo\\Acme\\Bar']));
 
-        $this->assertSame('Foo\\Acme\\Bar', $expand(array('**\\Bar'), array('\\Foo\\Acme\\Bar'))[0]);
-        $this->assertSame('Foo\\Acme\\Bundle\\Bar', $expand(array('**\\Bar'), array('\\Foo\\Acme\\Bundle\\Bar'))[0]);
-        $this->assertEmpty($expand(array('**\\Bar'), array('\\Bar')));
+        $this->assertSame('Foo\\Acme\\Bar', $expand(['**\\Bar'], ['\\Foo\\Acme\\Bar'])[0]);
+        $this->assertSame('Foo\\Acme\\Bundle\\Bar', $expand(['**\\Bar'], ['\\Foo\\Acme\\Bundle\\Bar'])[0]);
+        $this->assertEmpty($expand(['**\\Bar'], ['\\Bar']));
 
-        $this->assertSame('Foo\\Bar', $expand(array('Foo\\*'), array('\\Foo\\Bar'))[0]);
-        $this->assertEmpty($expand(array('Foo\\*'), array('\\Foo\\Acme\\Bar')));
+        $this->assertSame('Foo\\Bar', $expand(['Foo\\*'], ['\\Foo\\Bar'])[0]);
+        $this->assertEmpty($expand(['Foo\\*'], ['\\Foo\\Acme\\Bar']));
 
-        $this->assertSame('Foo\\Bar', $expand(array('Foo\\**'), array('\\Foo\\Bar'))[0]);
-        $this->assertSame('Foo\\Acme\\Bar', $expand(array('Foo\\**'), array('\\Foo\\Acme\\Bar'))[0]);
+        $this->assertSame('Foo\\Bar', $expand(['Foo\\**'], ['\\Foo\\Bar'])[0]);
+        $this->assertSame('Foo\\Acme\\Bar', $expand(['Foo\\**'], ['\\Foo\\Acme\\Bar'])[0]);
 
-        $this->assertSame(array('Foo\\Bar'), $expand(array('Foo\\*'), array('Foo\\Bar', 'Foo\\BarTest')));
-        $this->assertSame(array('Foo\\Bar', 'Foo\\BarTest'), $expand(array('Foo\\*', 'Foo\\*Test'), array('Foo\\Bar', 'Foo\\BarTest')));
+        $this->assertSame(['Foo\\Bar'], $expand(['Foo\\*'], ['Foo\\Bar', 'Foo\\BarTest']));
+        $this->assertSame(['Foo\\Bar', 'Foo\\BarTest'], $expand(['Foo\\*', 'Foo\\*Test'], ['Foo\\Bar', 'Foo\\BarTest']));
 
         $this->assertSame(
             'Acme\\FooBundle\\Controller\\DefaultController',
-            $expand(array('**Bundle\\Controller\\'), array('\\Acme\\FooBundle\\Controller\\DefaultController'))[0]
+            $expand(['**Bundle\\Controller\\'], ['\\Acme\\FooBundle\\Controller\\DefaultController'])[0]
         );
 
         $this->assertSame(
             'FooBundle\\Controller\\DefaultController',
-            $expand(array('**Bundle\\Controller\\'), array('\\FooBundle\\Controller\\DefaultController'))[0]
+            $expand(['**Bundle\\Controller\\'], ['\\FooBundle\\Controller\\DefaultController'])[0]
         );
 
         $this->assertSame(
             'Acme\\FooBundle\\Controller\\Bar\\DefaultController',
-            $expand(array('**Bundle\\Controller\\'), array('\\Acme\\FooBundle\\Controller\\Bar\\DefaultController'))[0]
+            $expand(['**Bundle\\Controller\\'], ['\\Acme\\FooBundle\\Controller\\Bar\\DefaultController'])[0]
         );
 
         $this->assertSame(
             'Bundle\\Controller\\Bar\\DefaultController',
-            $expand(array('**Bundle\\Controller\\'), array('\\Bundle\\Controller\\Bar\\DefaultController'))[0]
+            $expand(['**Bundle\\Controller\\'], ['\\Bundle\\Controller\\Bar\\DefaultController'])[0]
         );
 
         $this->assertSame(
             'Acme\\Bundle\\Controller\\Bar\\DefaultController',
-            $expand(array('**Bundle\\Controller\\'), array('\\Acme\\Bundle\\Controller\\Bar\\DefaultController'))[0]
+            $expand(['**Bundle\\Controller\\'], ['\\Acme\\Bundle\\Controller\\Bar\\DefaultController'])[0]
         );
 
-        $this->assertSame('Foo\\Bar', $expand(array('Foo\\Bar'), array())[0]);
-        $this->assertSame('Foo\\Acme\\Bar', $expand(array('Foo\\**'), array('\\Foo\\Acme\\Bar'))[0]);
+        $this->assertSame('Foo\\Bar', $expand(['Foo\\Bar'], [])[0]);
+        $this->assertSame('Foo\\Acme\\Bar', $expand(['Foo\\**'], ['\\Foo\\Acme\\Bar'])[0]);
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ControllerArgumentValueResolverPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ControllerArgumentValueResolverPassTest.php
index 49bbd0f9c1..2694d002cf 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ControllerArgumentValueResolverPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ControllerArgumentValueResolverPassTest.php
@@ -23,19 +23,19 @@ class ControllerArgumentValueResolverPassTest extends TestCase
 {
     public function testServicesAreOrderedAccordingToPriority()
     {
-        $services = array(
-            'n3' => array(array()),
-            'n1' => array(array('priority' => 200)),
-            'n2' => array(array('priority' => 100)),
-        );
+        $services = [
+            'n3' => [[]],
+            'n1' => [['priority' => 200]],
+            'n2' => [['priority' => 100]],
+        ];
 
-        $expected = array(
+        $expected = [
             new Reference('n1'),
             new Reference('n2'),
             new Reference('n3'),
-        );
+        ];
 
-        $definition = new Definition(ArgumentResolver::class, array(null, array()));
+        $definition = new Definition(ArgumentResolver::class, [null, []]);
         $container = new ContainerBuilder();
         $container->setDefinition('argument_resolver', $definition);
 
@@ -55,19 +55,19 @@ class ControllerArgumentValueResolverPassTest extends TestCase
 
     public function testInDebugWithStopWatchDefinition()
     {
-        $services = array(
-            'n3' => array(array()),
-            'n1' => array(array('priority' => 200)),
-            'n2' => array(array('priority' => 100)),
-        );
+        $services = [
+            'n3' => [[]],
+            'n1' => [['priority' => 200]],
+            'n2' => [['priority' => 100]],
+        ];
 
-        $expected = array(
+        $expected = [
             new Reference('n1'),
             new Reference('n2'),
             new Reference('n3'),
-        );
+        ];
 
-        $definition = new Definition(ArgumentResolver::class, array(null, array()));
+        $definition = new Definition(ArgumentResolver::class, [null, []]);
         $container = new ContainerBuilder();
         $container->register('debug.stopwatch', Stopwatch::class);
         $container->setDefinition('argument_resolver', $definition);
@@ -92,9 +92,9 @@ class ControllerArgumentValueResolverPassTest extends TestCase
 
     public function testInDebugWithouStopWatchDefinition()
     {
-        $expected = array(new Reference('n1'));
+        $expected = [new Reference('n1')];
 
-        $definition = new Definition(ArgumentResolver::class, array(null, array()));
+        $definition = new Definition(ArgumentResolver::class, [null, []]);
         $container = new ContainerBuilder();
         $container->register('n1')->addTag('controller.argument_value_resolver');
         $container->setDefinition('argument_resolver', $definition);
@@ -110,14 +110,14 @@ class ControllerArgumentValueResolverPassTest extends TestCase
 
     public function testReturningEmptyArrayWhenNoService()
     {
-        $definition = new Definition(ArgumentResolver::class, array(null, array()));
+        $definition = new Definition(ArgumentResolver::class, [null, []]);
         $container = new ContainerBuilder();
         $container->setDefinition('argument_resolver', $definition);
 
         $container->setParameter('kernel.debug', false);
 
         (new ControllerArgumentValueResolverPass())->process($container);
-        $this->assertEquals(array(), $definition->getArgument(1)->getValues());
+        $this->assertEquals([], $definition->getArgument(1)->getValues());
     }
 
     public function testNoArgumentResolver()
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
index e8957bb3cc..087c666596 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/FragmentRendererPassTest.php
@@ -33,12 +33,12 @@ class FragmentRendererPassTest extends TestCase
         $builder = new ContainerBuilder();
         $fragmentHandlerDefinition = $builder->register('fragment.handler');
         $builder->register('my_content_renderer', 'Symfony\Component\DependencyInjection\Definition')
-            ->addTag('kernel.fragment_renderer', array('alias' => 'foo'));
+            ->addTag('kernel.fragment_renderer', ['alias' => 'foo']);
 
         $pass = new FragmentRendererPass();
         $pass->process($builder);
 
-        $this->assertEquals(array(array('addRendererService', array('foo', 'my_content_renderer'))), $fragmentHandlerDefinition->getMethodCalls());
+        $this->assertEquals([['addRendererService', ['foo', 'my_content_renderer']]], $fragmentHandlerDefinition->getMethodCalls());
     }
 
     public function testValidContentRenderer()
@@ -47,20 +47,20 @@ class FragmentRendererPassTest extends TestCase
         $fragmentHandlerDefinition = $builder->register('fragment.handler')
             ->addArgument(null);
         $builder->register('my_content_renderer', 'Symfony\Component\HttpKernel\Tests\DependencyInjection\RendererService')
-            ->addTag('kernel.fragment_renderer', array('alias' => 'foo'));
+            ->addTag('kernel.fragment_renderer', ['alias' => 'foo']);
 
         $pass = new FragmentRendererPass();
         $pass->process($builder);
 
         $serviceLocatorDefinition = $builder->getDefinition((string) $fragmentHandlerDefinition->getArgument(0));
         $this->assertSame(ServiceLocator::class, $serviceLocatorDefinition->getClass());
-        $this->assertEquals(array('foo' => new ServiceClosureArgument(new Reference('my_content_renderer'))), $serviceLocatorDefinition->getArgument(0));
+        $this->assertEquals(['foo' => new ServiceClosureArgument(new Reference('my_content_renderer'))], $serviceLocatorDefinition->getArgument(0));
     }
 }
 
 class RendererService implements FragmentRendererInterface
 {
-    public function render($uri, Request $request = null, array $options = array())
+    public function render($uri, Request $request = null, array $options = [])
     {
     }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
index ae421d919b..7af756e0b8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/MergeExtensionConfigurationPassTest.php
@@ -23,9 +23,9 @@ class MergeExtensionConfigurationPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->registerExtension(new LoadedExtension());
         $container->registerExtension(new NotLoadedExtension());
-        $container->loadFromExtension('loaded', array());
+        $container->loadFromExtension('loaded', []);
 
-        $configPass = new MergeExtensionConfigurationPass(array('loaded', 'not_loaded'));
+        $configPass = new MergeExtensionConfigurationPass(['loaded', 'not_loaded']);
         $configPass->process($container);
 
         $this->assertTrue($container->hasDefinition('loaded.foo'));
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterControllerArgumentLocatorsPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterControllerArgumentLocatorsPassTest.php
index d03ea53a37..cf685b2ae2 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterControllerArgumentLocatorsPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterControllerArgumentLocatorsPassTest.php
@@ -32,7 +32,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testInvalidClass()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', NotFound::class)
             ->addTag('controller.service_arguments')
@@ -49,10 +49,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testNoAction()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('argument' => 'bar'))
+            ->addTag('controller.service_arguments', ['argument' => 'bar'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -66,10 +66,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testNoArgument()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'fooAction'))
+            ->addTag('controller.service_arguments', ['action' => 'fooAction'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -83,10 +83,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testNoService()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'fooAction', 'argument' => 'bar'))
+            ->addTag('controller.service_arguments', ['action' => 'fooAction', 'argument' => 'bar'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -100,10 +100,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testInvalidMethod()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'barAction', 'argument' => 'bar', 'id' => 'bar_service'))
+            ->addTag('controller.service_arguments', ['action' => 'barAction', 'argument' => 'bar', 'id' => 'bar_service'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -117,10 +117,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testInvalidArgument()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'fooAction', 'argument' => 'baz', 'id' => 'bar'))
+            ->addTag('controller.service_arguments', ['action' => 'fooAction', 'argument' => 'baz', 'id' => 'bar'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -130,7 +130,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testAllActions()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
             ->addTag('controller.service_arguments')
@@ -141,7 +141,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
 
         $locator = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
 
-        $this->assertEquals(array('foo::fooAction'), array_keys($locator));
+        $this->assertEquals(['foo::fooAction'], array_keys($locator));
         $this->assertInstanceof(ServiceClosureArgument::class, $locator['foo::fooAction']);
 
         $locator = $container->getDefinition((string) $locator['foo::fooAction']->getValues()[0]);
@@ -149,18 +149,18 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
         $this->assertSame(ServiceLocator::class, $locator->getClass());
         $this->assertFalse($locator->isPublic());
 
-        $expected = array('bar' => new ServiceClosureArgument(new TypedReference(ControllerDummy::class, ControllerDummy::class, ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE, 'bar')));
+        $expected = ['bar' => new ServiceClosureArgument(new TypedReference(ControllerDummy::class, ControllerDummy::class, ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE, 'bar'))];
         $this->assertEquals($expected, $locator->getArgument(0));
     }
 
     public function testExplicitArgument()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'fooAction', 'argument' => 'bar', 'id' => 'bar'))
-            ->addTag('controller.service_arguments', array('action' => 'fooAction', 'argument' => 'bar', 'id' => 'baz')) // should be ignored, the first wins
+            ->addTag('controller.service_arguments', ['action' => 'fooAction', 'argument' => 'bar', 'id' => 'bar'])
+            ->addTag('controller.service_arguments', ['action' => 'fooAction', 'argument' => 'bar', 'id' => 'baz']) // should be ignored, the first wins
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -169,17 +169,17 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
         $locator = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
         $locator = $container->getDefinition((string) $locator['foo::fooAction']->getValues()[0]);
 
-        $expected = array('bar' => new ServiceClosureArgument(new TypedReference('bar', ControllerDummy::class, ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE)));
+        $expected = ['bar' => new ServiceClosureArgument(new TypedReference('bar', ControllerDummy::class, ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE))];
         $this->assertEquals($expected, $locator->getArgument(0));
     }
 
     public function testOptionalArgument()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->addTag('controller.service_arguments', array('action' => 'fooAction', 'argument' => 'bar', 'id' => '?bar'))
+            ->addTag('controller.service_arguments', ['action' => 'fooAction', 'argument' => 'bar', 'id' => '?bar'])
         ;
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -188,14 +188,14 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
         $locator = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
         $locator = $container->getDefinition((string) $locator['foo::fooAction']->getValues()[0]);
 
-        $expected = array('bar' => new ServiceClosureArgument(new TypedReference('bar', ControllerDummy::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE)));
+        $expected = ['bar' => new ServiceClosureArgument(new TypedReference('bar', ControllerDummy::class, ContainerInterface::IGNORE_ON_INVALID_REFERENCE))];
         $this->assertEquals($expected, $locator->getArgument(0));
     }
 
     public function testSkipSetContainer()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', ContainerAwareRegisterTestController::class)
             ->addTag('controller.service_arguments');
@@ -204,7 +204,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
         $pass->process($container);
 
         $locator = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
-        $this->assertSame(array('foo::fooAction'), array_keys($locator));
+        $this->assertSame(['foo::fooAction'], array_keys($locator));
     }
 
     /**
@@ -214,7 +214,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testExceptionOnNonExistentTypeHint()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', NonExistentClassController::class)
             ->addTag('controller.service_arguments');
@@ -230,7 +230,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testExceptionOnNonExistentTypeHintDifferentNamespace()
     {
         $container = new ContainerBuilder();
-        $container->register('argument_resolver.service')->addArgument(array());
+        $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', NonExistentClassDifferentNamespaceController::class)
             ->addTag('controller.service_arguments');
@@ -242,7 +242,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testNoExceptionOnNonExistentTypeHintOptionalArg()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', NonExistentClassOptionalController::class)
             ->addTag('controller.service_arguments');
@@ -251,13 +251,13 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
         $pass->process($container);
 
         $locator = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
-        $this->assertSame(array('foo::barAction', 'foo::fooAction'), array_keys($locator));
+        $this->assertSame(['foo::barAction', 'foo::fooAction'], array_keys($locator));
     }
 
     public function testArgumentWithNoTypeHintIsOk()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', ArgumentWithoutTypeController::class)
             ->addTag('controller.service_arguments');
@@ -272,7 +272,7 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testControllersAreMadePublic()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', ArgumentWithoutTypeController::class)
             ->setPublic(false)
@@ -290,10 +290,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testBindings($bindingName)
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', RegisterTestController::class)
-            ->setBindings(array($bindingName => new Reference('foo')))
+            ->setBindings([$bindingName => new Reference('foo')])
             ->addTag('controller.service_arguments');
 
         $pass = new RegisterControllerArgumentLocatorsPass();
@@ -303,17 +303,17 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
 
         $locator = $container->getDefinition((string) $locator['foo::fooAction']->getValues()[0]);
 
-        $expected = array('bar' => new ServiceClosureArgument(new Reference('foo')));
+        $expected = ['bar' => new ServiceClosureArgument(new Reference('foo'))];
         $this->assertEquals($expected, $locator->getArgument(0));
     }
 
     public function provideBindings()
     {
-        return array(
-            array(ControllerDummy::class.'$bar'),
-            array(ControllerDummy::class),
-            array('$bar'),
-        );
+        return [
+            [ControllerDummy::class.'$bar'],
+            [ControllerDummy::class],
+            ['$bar'],
+        ];
     }
 
     /**
@@ -322,10 +322,10 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
     public function testBindScalarValueToControllerArgument($bindingKey)
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('foo', ArgumentWithoutTypeController::class)
-            ->setBindings(array($bindingKey => '%foo%'))
+            ->setBindings([$bindingKey => '%foo%'])
             ->addTag('controller.service_arguments');
 
         $container->setParameter('foo', 'foo_val');
@@ -350,19 +350,19 @@ class RegisterControllerArgumentLocatorsPassTest extends TestCase
 
     public function provideBindScalarValueToControllerArgument()
     {
-        yield array('$someArg');
-        yield array('string $someArg');
+        yield ['$someArg'];
+        yield ['string $someArg'];
     }
 
     public function testBindingsOnChildDefinitions()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('parent', ArgumentWithoutTypeController::class);
 
         $container->setDefinition('child', (new ChildDefinition('parent'))
-            ->setBindings(array('$someArg' => new Reference('parent')))
+            ->setBindings(['$someArg' => new Reference('parent')])
             ->addTag('controller.service_arguments')
         );
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RemoveEmptyControllerArgumentLocatorsPassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RemoveEmptyControllerArgumentLocatorsPassTest.php
index dfec38347d..56fe6baf76 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RemoveEmptyControllerArgumentLocatorsPassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RemoveEmptyControllerArgumentLocatorsPassTest.php
@@ -23,13 +23,13 @@ class RemoveEmptyControllerArgumentLocatorsPassTest extends TestCase
     public function testProcess()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('stdClass', 'stdClass');
         $container->register(parent::class, 'stdClass');
         $container->register('c1', RemoveTestController1::class)->addTag('controller.service_arguments');
         $container->register('c2', RemoveTestController2::class)->addTag('controller.service_arguments')
-            ->addMethodCall('setTestCase', array(new Reference('c1')));
+            ->addMethodCall('setTestCase', [new Reference('c1')]);
 
         $pass = new RegisterControllerArgumentLocatorsPass();
         $pass->process($container);
@@ -43,19 +43,19 @@ class RemoveEmptyControllerArgumentLocatorsPassTest extends TestCase
         (new ResolveInvalidReferencesPass())->process($container);
 
         $this->assertCount(1, $container->getDefinition((string) $controllers['c2::setTestCase']->getValues()[0])->getArgument(0));
-        $this->assertSame(array(), $container->getDefinition((string) $controllers['c2::fooAction']->getValues()[0])->getArgument(0));
+        $this->assertSame([], $container->getDefinition((string) $controllers['c2::fooAction']->getValues()[0])->getArgument(0));
 
         (new RemoveEmptyControllerArgumentLocatorsPass())->process($container);
 
         $controllers = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);
 
-        $this->assertSame(array('c1::fooAction', 'c1:fooAction'), array_keys($controllers));
-        $this->assertSame(array('bar'), array_keys($container->getDefinition((string) $controllers['c1::fooAction']->getValues()[0])->getArgument(0)));
+        $this->assertSame(['c1::fooAction', 'c1:fooAction'], array_keys($controllers));
+        $this->assertSame(['bar'], array_keys($container->getDefinition((string) $controllers['c1::fooAction']->getValues()[0])->getArgument(0)));
 
-        $expectedLog = array(
+        $expectedLog = [
             'Symfony\Component\HttpKernel\DependencyInjection\RemoveEmptyControllerArgumentLocatorsPass: Removing service-argument resolver for controller "c2::fooAction": no corresponding services exist for the referenced types.',
             'Symfony\Component\HttpKernel\DependencyInjection\RemoveEmptyControllerArgumentLocatorsPass: Removing method "setTestCase" of service "c2" from controller candidates: the method is called at instantiation, thus cannot be an action.',
-        );
+        ];
 
         $this->assertSame($expectedLog, $container->getCompiler()->getLog());
     }
@@ -63,7 +63,7 @@ class RemoveEmptyControllerArgumentLocatorsPassTest extends TestCase
     public function testInvoke()
     {
         $container = new ContainerBuilder();
-        $resolver = $container->register('argument_resolver.service')->addArgument(array());
+        $resolver = $container->register('argument_resolver.service')->addArgument([]);
 
         $container->register('invokable', InvokableRegisterTestController::class)
             ->addTag('controller.service_arguments')
@@ -73,7 +73,7 @@ class RemoveEmptyControllerArgumentLocatorsPassTest extends TestCase
         (new RemoveEmptyControllerArgumentLocatorsPass())->process($container);
 
         $this->assertEquals(
-            array('invokable::__invoke', 'invokable:__invoke', 'invokable'),
+            ['invokable::__invoke', 'invokable:__invoke', 'invokable'],
             array_keys($container->getDefinition((string) $resolver->getArgument(0))->getArgument(0))
         );
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
index f7ea16dbfb..9b23ad003d 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ResettableServicePassTest.php
@@ -19,14 +19,14 @@ class ResettableServicePassTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('one', ResettableService::class)
             ->setPublic(true)
-            ->addTag('kernel.reset', array('method' => 'reset'));
+            ->addTag('kernel.reset', ['method' => 'reset']);
         $container->register('two', ClearableService::class)
             ->setPublic(true)
-            ->addTag('kernel.reset', array('method' => 'clear'));
+            ->addTag('kernel.reset', ['method' => 'clear']);
 
         $container->register('services_resetter', ServicesResetter::class)
             ->setPublic(true)
-            ->setArguments(array(null, array()));
+            ->setArguments([null, []]);
         $container->addCompilerPass(new ResettableServicePass());
 
         $container->compile();
@@ -34,16 +34,16 @@ class ResettableServicePassTest extends TestCase
         $definition = $container->getDefinition('services_resetter');
 
         $this->assertEquals(
-            array(
-                new IteratorArgument(array(
+            [
+                new IteratorArgument([
                     'one' => new Reference('one', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE),
                     'two' => new Reference('two', ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE),
-                )),
-                array(
+                ]),
+                [
                     'one' => 'reset',
                     'two' => 'clear',
-                ),
-            ),
+                ],
+            ],
             $definition->getArguments()
         );
     }
@@ -58,7 +58,7 @@ class ResettableServicePassTest extends TestCase
         $container->register(ResettableService::class)
             ->addTag('kernel.reset');
         $container->register('services_resetter', ServicesResetter::class)
-            ->setArguments(array(null, array()));
+            ->setArguments([null, []]);
         $container->addCompilerPass(new ResettableServicePass());
 
         $container->compile();
@@ -68,7 +68,7 @@ class ResettableServicePassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('services_resetter', ServicesResetter::class)
-            ->setArguments(array(null, array()));
+            ->setArguments([null, []]);
         $container->addCompilerPass(new ResettableServicePass());
 
         $container->compile();
diff --git a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ServicesResetterTest.php b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ServicesResetterTest.php
index 47c62abd0d..86f1abdb05 100644
--- a/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ServicesResetterTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/DependencyInjection/ServicesResetterTest.php
@@ -26,13 +26,13 @@ class ServicesResetterTest extends TestCase
 
     public function testResetServices()
     {
-        $resetter = new ServicesResetter(new \ArrayIterator(array(
+        $resetter = new ServicesResetter(new \ArrayIterator([
             'id1' => new ResettableService(),
             'id2' => new ClearableService(),
-        )), array(
+        ]), [
             'id1' => 'reset',
             'id2' => 'clear',
-        ));
+        ]);
 
         $resetter->reset();
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Event/FilterControllerArgumentsEventTest.php b/src/Symfony/Component/HttpKernel/Tests/Event/FilterControllerArgumentsEventTest.php
index f1e440b2fc..abc51ac51e 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Event/FilterControllerArgumentsEventTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Event/FilterControllerArgumentsEventTest.php
@@ -11,7 +11,7 @@ class FilterControllerArgumentsEventTest extends TestCase
 {
     public function testFilterControllerArgumentsEvent()
     {
-        $filterController = new FilterControllerArgumentsEvent(new TestHttpKernel(), function () {}, array('test'), new Request(), 1);
-        $this->assertEquals($filterController->getArguments(), array('test'));
+        $filterController = new FilterControllerArgumentsEvent(new TestHttpKernel(), function () {}, ['test'], new Request(), 1);
+        $this->assertEquals($filterController->getArguments(), ['test']);
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
index 9a9c17edab..d9e261d35a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/DebugHandlersListenerTest.php
@@ -40,11 +40,11 @@ class DebugHandlersListenerTest extends TestCase
         $listener = new DebugHandlersListener($userHandler, $logger);
         $xHandler = new ExceptionHandler();
         $eHandler = new ErrorHandler();
-        $eHandler->setExceptionHandler(array($xHandler, 'handle'));
+        $eHandler->setExceptionHandler([$xHandler, 'handle']);
 
         $exception = null;
-        set_error_handler(array($eHandler, 'handleError'));
-        set_exception_handler(array($eHandler, 'handleException'));
+        set_error_handler([$eHandler, 'handleError']);
+        set_exception_handler([$eHandler, 'handleException']);
         try {
             $listener->configure();
         } catch (\Exception $exception) {
@@ -58,10 +58,10 @@ class DebugHandlersListenerTest extends TestCase
 
         $this->assertSame($userHandler, $xHandler->setHandler('var_dump'));
 
-        $loggers = $eHandler->setLoggers(array());
+        $loggers = $eHandler->setLoggers([]);
 
         $this->assertArrayHasKey(E_DEPRECATED, $loggers);
-        $this->assertSame(array($logger, LogLevel::INFO), $loggers[E_DEPRECATED]);
+        $this->assertSame([$logger, LogLevel::INFO], $loggers[E_DEPRECATED]);
     }
 
     public function testConfigureForHttpKernelWithNoTerminateWithException()
@@ -75,7 +75,7 @@ class DebugHandlersListenerTest extends TestCase
         );
 
         $exception = null;
-        $h = set_exception_handler(array($eHandler, 'handleException'));
+        $h = set_exception_handler([$eHandler, 'handleException']);
         try {
             $listener->configure($event);
         } catch (\Exception $exception) {
@@ -101,16 +101,16 @@ class DebugHandlersListenerTest extends TestCase
 
         $dispatcher->addSubscriber($listener);
 
-        $xListeners = array(
-            KernelEvents::REQUEST => array(array($listener, 'configure')),
-            ConsoleEvents::COMMAND => array(array($listener, 'configure')),
-        );
+        $xListeners = [
+            KernelEvents::REQUEST => [[$listener, 'configure']],
+            ConsoleEvents::COMMAND => [[$listener, 'configure']],
+        ];
         $this->assertSame($xListeners, $dispatcher->getListeners());
 
         $exception = null;
         $eHandler = new ErrorHandler();
-        set_error_handler(array($eHandler, 'handleError'));
-        set_exception_handler(array($eHandler, 'handleException'));
+        set_error_handler([$eHandler, 'handleError']);
+        set_exception_handler([$eHandler, 'handleException']);
         try {
             $dispatcher->dispatch(ConsoleEvents::COMMAND, $event);
         } catch (\Exception $exception) {
@@ -139,7 +139,7 @@ class DebugHandlersListenerTest extends TestCase
         $eHandler->setExceptionHandler('var_dump');
 
         $exception = null;
-        set_exception_handler(array($eHandler, 'handleException'));
+        set_exception_handler([$eHandler, 'handleException']);
         try {
             $listener->configure();
         } catch (\Exception $exception) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
index 509f443087..b86a7552f8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/DumpListenerTest.php
@@ -29,7 +29,7 @@ class DumpListenerTest extends TestCase
     public function testSubscribedEvents()
     {
         $this->assertSame(
-            array(ConsoleEvents::COMMAND => array('configure', 1024)),
+            [ConsoleEvents::COMMAND => ['configure', 1024]],
             DumpListener::getSubscribedEvents()
         );
     }
@@ -68,7 +68,7 @@ class MockCloner implements ClonerInterface
 {
     public function cloneVar($var)
     {
-        return new Data(array(array($var.'-')));
+        return new Data([[$var.'-']]);
     }
 }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
index 5251976e49..b7224ddcea 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ExceptionListenerTest.php
@@ -98,7 +98,7 @@ class ExceptionListenerTest extends TestCase
     public function provider()
     {
         if (!class_exists('Symfony\Component\HttpFoundation\Request')) {
-            return array(array(null, null));
+            return [[null, null]];
         }
 
         $request = new Request();
@@ -106,9 +106,9 @@ class ExceptionListenerTest extends TestCase
         $event = new GetResponseForExceptionEvent(new TestKernel(), $request, HttpKernelInterface::MASTER_REQUEST, $exception);
         $event2 = new GetResponseForExceptionEvent(new TestKernelThatThrowsException(), $request, HttpKernelInterface::MASTER_REQUEST, $exception);
 
-        return array(
-            array($event, $event2),
-        );
+        return [
+            [$event, $event2],
+        ];
     }
 
     public function testSubRequestFormat()
@@ -146,7 +146,7 @@ class ExceptionListenerTest extends TestCase
         $event = new GetResponseForExceptionEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST, new \Exception('foo'));
         $dispatcher->dispatch(KernelEvents::EXCEPTION, $event);
 
-        $response = new Response('', 200, array('content-security-policy' => "style-src 'self'"));
+        $response = new Response('', 200, ['content-security-policy' => "style-src 'self'"]);
         $this->assertTrue($response->headers->has('content-security-policy'));
 
         $event = new FilterResponseEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST, $response);
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
index edf0498265..6408b1b21c 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/FragmentListenerTest.php
@@ -68,7 +68,7 @@ class FragmentListenerTest extends TestCase
      */
     public function testAccessDeniedWithWrongSignature()
     {
-        $request = Request::create('http://example.com/_fragment', 'GET', array(), array(), array(), array('REMOTE_ADDR' => '10.0.0.1'));
+        $request = Request::create('http://example.com/_fragment', 'GET', [], [], [], ['REMOTE_ADDR' => '10.0.0.1']);
 
         $listener = new FragmentListener(new UriSigner('foo'));
         $event = $this->createGetResponseEvent($request);
@@ -79,14 +79,14 @@ class FragmentListenerTest extends TestCase
     public function testWithSignature()
     {
         $signer = new UriSigner('foo');
-        $request = Request::create($signer->sign('http://example.com/_fragment?_path=foo%3Dbar%26_controller%3Dfoo'), 'GET', array(), array(), array(), array('REMOTE_ADDR' => '10.0.0.1'));
+        $request = Request::create($signer->sign('http://example.com/_fragment?_path=foo%3Dbar%26_controller%3Dfoo'), 'GET', [], [], [], ['REMOTE_ADDR' => '10.0.0.1']);
 
         $listener = new FragmentListener($signer);
         $event = $this->createGetResponseEvent($request);
 
         $listener->onKernelRequest($event);
 
-        $this->assertEquals(array('foo' => 'bar', '_controller' => 'foo'), $request->attributes->get('_route_params'));
+        $this->assertEquals(['foo' => 'bar', '_controller' => 'foo'], $request->attributes->get('_route_params'));
         $this->assertFalse($request->query->has('_path'));
     }
 
@@ -105,7 +105,7 @@ class FragmentListenerTest extends TestCase
     public function testRemovesPathWithControllerNotDefined()
     {
         $signer = new UriSigner('foo');
-        $request = Request::create($signer->sign('http://example.com/_fragment?_path=foo%3Dbar'), 'GET', array(), array(), array(), array('REMOTE_ADDR' => '10.0.0.1'));
+        $request = Request::create($signer->sign('http://example.com/_fragment?_path=foo%3Dbar'), 'GET', [], [], [], ['REMOTE_ADDR' => '10.0.0.1']);
 
         $listener = new FragmentListener($signer);
         $event = $this->createGetResponseEvent($request);
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
index 20282766a8..2ad903f4b1 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
@@ -72,7 +72,7 @@ class LocaleListenerTest extends TestCase
         $context = $this->getMockBuilder('Symfony\Component\Routing\RequestContext')->getMock();
         $context->expects($this->once())->method('setParameter')->with('_locale', 'es');
 
-        $router = $this->getMockBuilder('Symfony\Component\Routing\Router')->setMethods(array('getContext'))->disableOriginalConstructor()->getMock();
+        $router = $this->getMockBuilder('Symfony\Component\Routing\Router')->setMethods(['getContext'])->disableOriginalConstructor()->getMock();
         $router->expects($this->once())->method('getContext')->will($this->returnValue($context));
 
         $request = Request::create('/');
@@ -88,7 +88,7 @@ class LocaleListenerTest extends TestCase
         $context = $this->getMockBuilder('Symfony\Component\Routing\RequestContext')->getMock();
         $context->expects($this->once())->method('setParameter')->with('_locale', 'es');
 
-        $router = $this->getMockBuilder('Symfony\Component\Routing\Router')->setMethods(array('getContext'))->disableOriginalConstructor()->getMock();
+        $router = $this->getMockBuilder('Symfony\Component\Routing\Router')->setMethods(['getContext'])->disableOriginalConstructor()->getMock();
         $router->expects($this->once())->method('getContext')->will($this->returnValue($context));
 
         $parentRequest = Request::create('/');
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
index 1d8960267d..aeab68f3e9 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ResponseListenerTest.php
@@ -30,7 +30,7 @@ class ResponseListenerTest extends TestCase
     {
         $this->dispatcher = new EventDispatcher();
         $listener = new ResponseListener('UTF-8');
-        $this->dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+        $this->dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
 
         $this->kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock();
     }
@@ -54,7 +54,7 @@ class ResponseListenerTest extends TestCase
     public function testFilterSetsNonDefaultCharsetIfNotOverridden()
     {
         $listener = new ResponseListener('ISO-8859-15');
-        $this->dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'), 1);
+        $this->dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse'], 1);
 
         $response = new Response('foo');
 
@@ -67,7 +67,7 @@ class ResponseListenerTest extends TestCase
     public function testFilterDoesNothingIfCharsetIsOverridden()
     {
         $listener = new ResponseListener('ISO-8859-15');
-        $this->dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'), 1);
+        $this->dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse'], 1);
 
         $response = new Response('foo');
         $response->setCharset('ISO-8859-1');
@@ -81,7 +81,7 @@ class ResponseListenerTest extends TestCase
     public function testFiltersSetsNonDefaultCharsetIfNotOverriddenOnNonTextContentType()
     {
         $listener = new ResponseListener('ISO-8859-15');
-        $this->dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'), 1);
+        $this->dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse'], 1);
 
         $response = new Response('foo');
         $request = Request::create('/');
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
index 92e7272965..c27b341300 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/RouterListenerTest.php
@@ -62,12 +62,12 @@ class RouterListenerTest extends TestCase
 
     public function getPortData()
     {
-        return array(
-            array(80, 443, 'http://localhost/', 80, 443),
-            array(80, 443, 'http://localhost:90/', 90, 443),
-            array(80, 443, 'https://localhost/', 80, 443),
-            array(80, 443, 'https://localhost:90/', 80, 90),
-        );
+        return [
+            [80, 443, 'http://localhost/', 80, 443],
+            [80, 443, 'http://localhost:90/', 90, 443],
+            [80, 443, 'https://localhost/', 80, 443],
+            [80, 443, 'https://localhost:90/', 80, 90],
+        ];
     }
 
     private function createGetResponseEventForUri(string $uri): GetResponseEvent
@@ -97,7 +97,7 @@ class RouterListenerTest extends TestCase
         $requestMatcher->expects($this->once())
                        ->method('matchRequest')
                        ->with($this->isInstanceOf('Symfony\Component\HttpFoundation\Request'))
-                       ->will($this->returnValue(array()));
+                       ->will($this->returnValue([]));
 
         $listener = new RouterListener($requestMatcher, $this->requestStack, new RequestContext());
         $listener->onKernelRequest($event);
@@ -113,7 +113,7 @@ class RouterListenerTest extends TestCase
         $requestMatcher->expects($this->any())
                        ->method('matchRequest')
                        ->with($this->isInstanceOf('Symfony\Component\HttpFoundation\Request'))
-                       ->will($this->returnValue(array()));
+                       ->will($this->returnValue([]));
 
         $context = new RequestContext();
 
@@ -154,10 +154,10 @@ class RouterListenerTest extends TestCase
 
     public function getLoggingParameterData()
     {
-        return array(
-            array(array('_route' => 'foo'), 'Matched route "{route}".', array('route' => 'foo', 'route_parameters' => array('_route' => 'foo'), 'request_uri' => 'http://localhost/', 'method' => 'GET')),
-            array(array(), 'Matched route "{route}".', array('route' => 'n/a', 'route_parameters' => array(), 'request_uri' => 'http://localhost/', 'method' => 'GET')),
-        );
+        return [
+            [['_route' => 'foo'], 'Matched route "{route}".', ['route' => 'foo', 'route_parameters' => ['_route' => 'foo'], 'request_uri' => 'http://localhost/', 'method' => 'GET']],
+            [[], 'Matched route "{route}".', ['route' => 'n/a', 'route_parameters' => [], 'request_uri' => 'http://localhost/', 'method' => 'GET']],
+        ];
     }
 
     public function testWithBadRequest()
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/SessionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/SessionListenerTest.php
index e6255a56e1..47ac75e8bc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/SessionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/SessionListenerTest.php
@@ -113,9 +113,9 @@ class SessionListenerTest extends TestCase
         $response->setSharedMaxAge(60);
         $response->headers->set(AbstractSessionListener::NO_AUTO_CACHE_CONTROL_HEADER, 'true');
 
-        $container = new ServiceLocator(array(
+        $container = new ServiceLocator([
             'initialized_session' => function () {},
-        ));
+        ]);
 
         $listener = new SessionListener($container);
         $listener->onKernelResponse(new FilterResponseEvent($kernel, new Request(), HttpKernelInterface::MASTER_REQUEST, $response));
@@ -140,7 +140,7 @@ class SessionListenerTest extends TestCase
 
         $request = new Request();
         $response = new Response();
-        $response->setCache(array('public' => true, 'max_age' => '30'));
+        $response->setCache(['public' => true, 'max_age' => '30']);
         $listener->onKernelRequest(new GetResponseEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST));
         $this->assertTrue($request->hasSession());
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
index b955c07d47..66e119f123 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/SurrogateListenerTest.php
@@ -30,7 +30,7 @@ class SurrogateListenerTest extends TestCase
         $response = new Response('foo <esi:include src="" />');
         $listener = new SurrogateListener(new Esi());
 
-        $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+        $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
         $event = new FilterResponseEvent($kernel, new Request(), HttpKernelInterface::SUB_REQUEST, $response);
         $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -44,7 +44,7 @@ class SurrogateListenerTest extends TestCase
         $response = new Response('foo <esi:include src="" />');
         $listener = new SurrogateListener(new Esi());
 
-        $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+        $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
         $event = new FilterResponseEvent($kernel, new Request(), HttpKernelInterface::MASTER_REQUEST, $response);
         $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
@@ -58,7 +58,7 @@ class SurrogateListenerTest extends TestCase
         $response = new Response('foo');
         $listener = new SurrogateListener(new Esi());
 
-        $dispatcher->addListener(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+        $dispatcher->addListener(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
         $event = new FilterResponseEvent($kernel, new Request(), HttpKernelInterface::MASTER_REQUEST, $response);
         $dispatcher->dispatch(KernelEvents::RESPONSE, $event);
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
index cd52bd56e2..9f6a5ef759 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/TestSessionListenerTest.php
@@ -86,7 +86,7 @@ class TestSessionListenerTest extends TestCase
 
         $response = $this->filterResponse(new Request(), HttpKernelInterface::MASTER_REQUEST);
 
-        $this->assertSame(array(), $response->headers->getCookies());
+        $this->assertSame([], $response->headers->getCookies());
     }
 
     public function testEmptySessionWithNewSessionIdDoesSendCookie()
@@ -96,7 +96,7 @@ class TestSessionListenerTest extends TestCase
         $this->fixSessionId('456');
 
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock();
-        $request = Request::create('/', 'GET', array(), array('MOCKSESSID' => '123'));
+        $request = Request::create('/', 'GET', [], ['MOCKSESSID' => '123']);
         $event = new GetResponseEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST);
         $this->listener->onKernelRequest($event);
 
@@ -115,11 +115,11 @@ class TestSessionListenerTest extends TestCase
         $this->fixSessionId('456');
 
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock();
-        $request = Request::create('/', 'GET', array(), array('MOCKSESSID' => '123'));
+        $request = Request::create('/', 'GET', [], ['MOCKSESSID' => '123']);
         $event = new GetResponseEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST);
         $this->listener->onKernelRequest($event);
 
-        $response = new Response('', 200, array('Set-Cookie' => $existing));
+        $response = new Response('', 200, ['Set-Cookie' => $existing]);
 
         $response = $this->filterResponse(new Request(), HttpKernelInterface::MASTER_REQUEST, $response);
 
@@ -128,11 +128,11 @@ class TestSessionListenerTest extends TestCase
 
     public function anotherCookieProvider()
     {
-        return array(
-            'same' => array('MOCKSESSID=789; path=/', array('MOCKSESSID=789; path=/')),
-            'different domain' => array('MOCKSESSID=789; path=/; domain=example.com', array('MOCKSESSID=789; path=/; domain=example.com', 'MOCKSESSID=456; path=/')),
-            'different path' => array('MOCKSESSID=789; path=/foo', array('MOCKSESSID=789; path=/foo', 'MOCKSESSID=456; path=/')),
-        );
+        return [
+            'same' => ['MOCKSESSID=789; path=/', ['MOCKSESSID=789; path=/']],
+            'different domain' => ['MOCKSESSID=789; path=/; domain=example.com', ['MOCKSESSID=789; path=/; domain=example.com', 'MOCKSESSID=456; path=/']],
+            'different path' => ['MOCKSESSID=789; path=/foo', ['MOCKSESSID=789; path=/foo', 'MOCKSESSID=456; path=/']],
+        ];
     }
 
     public function testUnstartedSessionIsNotSave()
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
index bdab742ce1..fb7a4379bf 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/ValidateRequestListenerTest.php
@@ -23,7 +23,7 @@ class ValidateRequestListenerTest extends TestCase
 {
     protected function tearDown()
     {
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     /**
@@ -35,12 +35,12 @@ class ValidateRequestListenerTest extends TestCase
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock();
 
         $request = new Request();
-        $request->setTrustedProxies(array('1.1.1.1'), Request::HEADER_X_FORWARDED_FOR | Request::HEADER_FORWARDED);
+        $request->setTrustedProxies(['1.1.1.1'], Request::HEADER_X_FORWARDED_FOR | Request::HEADER_FORWARDED);
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $request->headers->set('FORWARDED', 'for=2.2.2.2');
         $request->headers->set('X_FORWARDED_FOR', '3.3.3.3');
 
-        $dispatcher->addListener(KernelEvents::REQUEST, array(new ValidateRequestListener(), 'onKernelRequest'));
+        $dispatcher->addListener(KernelEvents::REQUEST, [new ValidateRequestListener(), 'onKernelRequest']);
         $event = new GetResponseEvent($kernel, $request, HttpKernelInterface::MASTER_REQUEST);
 
         $dispatcher->dispatch(KernelEvents::REQUEST, $event);
diff --git a/src/Symfony/Component/HttpKernel/Tests/Exception/HttpExceptionTest.php b/src/Symfony/Component/HttpKernel/Tests/Exception/HttpExceptionTest.php
index b64773551e..f5fe97255b 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Exception/HttpExceptionTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Exception/HttpExceptionTest.php
@@ -9,22 +9,22 @@ class HttpExceptionTest extends TestCase
 {
     public function headerDataProvider()
     {
-        return array(
-            array(array('X-Test' => 'Test')),
-            array(array('X-Test' => 1)),
-            array(
-                array(
-                    array('X-Test' => 'Test'),
-                    array('X-Test-2' => 'Test-2'),
-                ),
-            ),
-        );
+        return [
+            [['X-Test' => 'Test']],
+            [['X-Test' => 1]],
+            [
+                [
+                    ['X-Test' => 'Test'],
+                    ['X-Test-2' => 'Test-2'],
+                ],
+            ],
+        ];
     }
 
     public function testHeadersDefault()
     {
         $exception = $this->createException();
-        $this->assertSame(array(), $exception->getHeaders());
+        $this->assertSame([], $exception->getHeaders());
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/Tests/Exception/MethodNotAllowedHttpExceptionTest.php b/src/Symfony/Component/HttpKernel/Tests/Exception/MethodNotAllowedHttpExceptionTest.php
index ea82014952..991f97582d 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Exception/MethodNotAllowedHttpExceptionTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Exception/MethodNotAllowedHttpExceptionTest.php
@@ -8,17 +8,17 @@ class MethodNotAllowedHttpExceptionTest extends HttpExceptionTest
 {
     public function testHeadersDefault()
     {
-        $exception = new MethodNotAllowedHttpException(array('GET', 'PUT'));
-        $this->assertSame(array('Allow' => 'GET, PUT'), $exception->getHeaders());
+        $exception = new MethodNotAllowedHttpException(['GET', 'PUT']);
+        $this->assertSame(['Allow' => 'GET, PUT'], $exception->getHeaders());
     }
 
     public function testWithHeaderConstruct()
     {
-        $headers = array(
+        $headers = [
             'Cache-Control' => 'public, s-maxage=1200',
-        );
+        ];
 
-        $exception = new MethodNotAllowedHttpException(array('get'), null, null, null, $headers);
+        $exception = new MethodNotAllowedHttpException(['get'], null, null, null, $headers);
 
         $headers['Allow'] = 'GET';
 
@@ -30,7 +30,7 @@ class MethodNotAllowedHttpExceptionTest extends HttpExceptionTest
      */
     public function testHeadersSetter($headers)
     {
-        $exception = new MethodNotAllowedHttpException(array('GET'));
+        $exception = new MethodNotAllowedHttpException(['GET']);
         $exception->setHeaders($headers);
         $this->assertSame($headers, $exception->getHeaders());
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Exception/ServiceUnavailableHttpExceptionTest.php b/src/Symfony/Component/HttpKernel/Tests/Exception/ServiceUnavailableHttpExceptionTest.php
index 83cbdc2bcc..daa4fa407a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Exception/ServiceUnavailableHttpExceptionTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Exception/ServiceUnavailableHttpExceptionTest.php
@@ -9,14 +9,14 @@ class ServiceUnavailableHttpExceptionTest extends HttpExceptionTest
     public function testHeadersDefaultRetryAfter()
     {
         $exception = new ServiceUnavailableHttpException(10);
-        $this->assertSame(array('Retry-After' => 10), $exception->getHeaders());
+        $this->assertSame(['Retry-After' => 10], $exception->getHeaders());
     }
 
     public function testWithHeaderConstruct()
     {
-        $headers = array(
+        $headers = [
             'Cache-Control' => 'public, s-maxage=1337',
-        );
+        ];
 
         $exception = new ServiceUnavailableHttpException(1337, null, null, null, $headers);
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Exception/TooManyRequestsHttpExceptionTest.php b/src/Symfony/Component/HttpKernel/Tests/Exception/TooManyRequestsHttpExceptionTest.php
index 6ec7f3d079..0048ec85c0 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Exception/TooManyRequestsHttpExceptionTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Exception/TooManyRequestsHttpExceptionTest.php
@@ -9,14 +9,14 @@ class TooManyRequestsHttpExceptionTest extends HttpExceptionTest
     public function testHeadersDefaultRertyAfter()
     {
         $exception = new TooManyRequestsHttpException(10);
-        $this->assertSame(array('Retry-After' => 10), $exception->getHeaders());
+        $this->assertSame(['Retry-After' => 10], $exception->getHeaders());
     }
 
     public function testWithHeaderConstruct()
     {
-        $headers = array(
+        $headers = [
             'Cache-Control' => 'public, s-maxage=69',
-        );
+        ];
 
         $exception = new TooManyRequestsHttpException(69, null, null, null, $headers);
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Exception/UnauthorizedHttpExceptionTest.php b/src/Symfony/Component/HttpKernel/Tests/Exception/UnauthorizedHttpExceptionTest.php
index 1e93d25b1a..c7239e70b3 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Exception/UnauthorizedHttpExceptionTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Exception/UnauthorizedHttpExceptionTest.php
@@ -9,14 +9,14 @@ class UnauthorizedHttpExceptionTest extends HttpExceptionTest
     public function testHeadersDefault()
     {
         $exception = new UnauthorizedHttpException('Challenge');
-        $this->assertSame(array('WWW-Authenticate' => 'Challenge'), $exception->getHeaders());
+        $this->assertSame(['WWW-Authenticate' => 'Challenge'], $exception->getHeaders());
     }
 
     public function testWithHeaderConstruct()
     {
-        $headers = array(
+        $headers = [
             'Cache-Control' => 'public, s-maxage=1200',
-        );
+        ];
 
         $exception = new UnauthorizedHttpException('Challenge', null, null, null, $headers);
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php b/src/Symfony/Component/HttpKernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php
index 89dec36af4..4f5de182fd 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fixtures/DataCollector/CloneVarDataCollector.php
@@ -31,7 +31,7 @@ class CloneVarDataCollector extends DataCollector
 
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
     }
 
     public function getData()
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelForTest.php b/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelForTest.php
index 9734594b6e..868094a596 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelForTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelForTest.php
@@ -23,7 +23,7 @@ class KernelForTest extends Kernel
 
     public function registerBundles()
     {
-        return array();
+        return [];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelWithoutBundles.php b/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelWithoutBundles.php
index 0d0881d629..2391557362 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelWithoutBundles.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fixtures/KernelWithoutBundles.php
@@ -19,7 +19,7 @@ class KernelWithoutBundles extends Kernel
 {
     public function registerBundles()
     {
-        return array();
+        return [];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fixtures/TestEventDispatcher.php b/src/Symfony/Component/HttpKernel/Tests/Fixtures/TestEventDispatcher.php
index d5456fe5dc..a0665ef991 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fixtures/TestEventDispatcher.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fixtures/TestEventDispatcher.php
@@ -17,12 +17,12 @@ class TestEventDispatcher extends TraceableEventDispatcher
 {
     public function getCalledListeners()
     {
-        return array('foo');
+        return ['foo'];
     }
 
     public function getNotCalledListeners()
     {
-        return array('bar');
+        return ['bar'];
     }
 
     public function reset()
@@ -31,6 +31,6 @@ class TestEventDispatcher extends TraceableEventDispatcher
 
     public function getOrphanedEvents()
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
index 79a9f74da4..d8006e1707 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/EsiFragmentRendererTest.php
@@ -30,7 +30,7 @@ class EsiFragmentRendererTest extends TestCase
     {
         $strategy = new EsiFragmentRenderer(new Esi(), $this->getInlineStrategy(true), new UriSigner('foo'));
         $request = Request::create('/');
-        $reference = new ControllerReference('main_controller', array('foo' => array(true)), array());
+        $reference = new ControllerReference('main_controller', ['foo' => [true]], []);
         $strategy->render($reference, $request);
     }
 
@@ -43,8 +43,8 @@ class EsiFragmentRendererTest extends TestCase
         $request->headers->set('Surrogate-Capability', 'ESI/1.0');
 
         $this->assertEquals('<esi:include src="/" />', $strategy->render('/', $request)->getContent());
-        $this->assertEquals("<esi:comment text=\"This is a comment\" />\n<esi:include src=\"/\" />", $strategy->render('/', $request, array('comment' => 'This is a comment'))->getContent());
-        $this->assertEquals('<esi:include src="/" alt="foo" />', $strategy->render('/', $request, array('alt' => 'foo'))->getContent());
+        $this->assertEquals("<esi:comment text=\"This is a comment\" />\n<esi:include src=\"/\" />", $strategy->render('/', $request, ['comment' => 'This is a comment'])->getContent());
+        $this->assertEquals('<esi:include src="/" alt="foo" />', $strategy->render('/', $request, ['alt' => 'foo'])->getContent());
     }
 
     public function testRenderControllerReference()
@@ -56,12 +56,12 @@ class EsiFragmentRendererTest extends TestCase
         $request->setLocale('fr');
         $request->headers->set('Surrogate-Capability', 'ESI/1.0');
 
-        $reference = new ControllerReference('main_controller', array(), array());
-        $altReference = new ControllerReference('alt_controller', array(), array());
+        $reference = new ControllerReference('main_controller', [], []);
+        $altReference = new ControllerReference('alt_controller', [], []);
 
         $this->assertEquals(
             '<esi:include src="/_fragment?_hash=Jz1P8NErmhKTeI6onI1EdAXTB85359MY3RIk5mSJ60w%3D&_path=_format%3Dhtml%26_locale%3Dfr%26_controller%3Dmain_controller" alt="/_fragment?_hash=iPJEdRoUpGrM1ztqByiorpfMPtiW%2FOWwdH1DBUXHhEc%3D&_path=_format%3Dhtml%26_locale%3Dfr%26_controller%3Dalt_controller" />',
-            $strategy->render($reference, $request, array('alt' => $altReference))->getContent()
+            $strategy->render($reference, $request, ['alt' => $altReference])->getContent()
         );
     }
 
@@ -90,7 +90,7 @@ class EsiFragmentRendererTest extends TestCase
         $request->setLocale('fr');
         $request->headers->set('Surrogate-Capability', 'ESI/1.0');
 
-        $strategy->render('/', $request, array('alt' => new ControllerReference('alt_controller')));
+        $strategy->render('/', $request, ['alt' => new ControllerReference('alt_controller')]);
     }
 
     private function getInlineStrategy($called = false)
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
index 0dfaa79682..bc7236f0a8 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/FragmentHandlerTest.php
@@ -68,12 +68,12 @@ class FragmentHandlerTest extends TestCase
 
     public function testRender()
     {
-        $handler = $this->getHandler($this->returnValue(new Response('foo')), array('/', Request::create('/'), array('foo' => 'foo', 'ignore_errors' => true)));
+        $handler = $this->getHandler($this->returnValue(new Response('foo')), ['/', Request::create('/'), ['foo' => 'foo', 'ignore_errors' => true]]);
 
-        $this->assertEquals('foo', $handler->render('/', 'foo', array('foo' => 'foo')));
+        $this->assertEquals('foo', $handler->render('/', 'foo', ['foo' => 'foo']));
     }
 
-    protected function getHandler($returnValue, $arguments = array())
+    protected function getHandler($returnValue, $arguments = [])
     {
         $renderer = $this->getMockBuilder('Symfony\Component\HttpKernel\Fragment\FragmentRendererInterface')->getMock();
         $renderer
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
index 68f8ded4e9..6125d95ff4 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
@@ -25,14 +25,14 @@ class HIncludeFragmentRendererTest extends TestCase
     public function testRenderExceptionWhenControllerAndNoSigner()
     {
         $strategy = new HIncludeFragmentRenderer();
-        $strategy->render(new ControllerReference('main_controller', array(), array()), Request::create('/'));
+        $strategy->render(new ControllerReference('main_controller', [], []), Request::create('/'));
     }
 
     public function testRenderWithControllerAndSigner()
     {
         $strategy = new HIncludeFragmentRenderer(null, new UriSigner('foo'));
 
-        $this->assertEquals('<hx:include src="/_fragment?_hash=BP%2BOzCD5MRUI%2BHJpgPDOmoju00FnzLhP3TGcSHbbBLs%3D&amp;_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dmain_controller"></hx:include>', $strategy->render(new ControllerReference('main_controller', array(), array()), Request::create('/'))->getContent());
+        $this->assertEquals('<hx:include src="/_fragment?_hash=BP%2BOzCD5MRUI%2BHJpgPDOmoju00FnzLhP3TGcSHbbBLs%3D&amp;_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dmain_controller"></hx:include>', $strategy->render(new ControllerReference('main_controller', [], []), Request::create('/'))->getContent());
     }
 
     public function testRenderWithUri()
@@ -48,30 +48,30 @@ class HIncludeFragmentRendererTest extends TestCase
     {
         // only default
         $strategy = new HIncludeFragmentRenderer();
-        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default'))->getContent());
+        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default'])->getContent());
 
         // only global default
         $strategy = new HIncludeFragmentRenderer(null, null, 'global_default');
-        $this->assertEquals('<hx:include src="/foo">global_default</hx:include>', $strategy->render('/foo', Request::create('/'), array())->getContent());
+        $this->assertEquals('<hx:include src="/foo">global_default</hx:include>', $strategy->render('/foo', Request::create('/'), [])->getContent());
 
         // global default and default
         $strategy = new HIncludeFragmentRenderer(null, null, 'global_default');
-        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default'))->getContent());
+        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default'])->getContent());
     }
 
     public function testRenderWithAttributesOptions()
     {
         // with id
         $strategy = new HIncludeFragmentRenderer();
-        $this->assertEquals('<hx:include src="/foo" id="bar">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default', 'id' => 'bar'))->getContent());
+        $this->assertEquals('<hx:include src="/foo" id="bar">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default', 'id' => 'bar'])->getContent());
 
         // with attributes
         $strategy = new HIncludeFragmentRenderer();
-        $this->assertEquals('<hx:include src="/foo" p1="v1" p2="v2">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default', 'attributes' => array('p1' => 'v1', 'p2' => 'v2')))->getContent());
+        $this->assertEquals('<hx:include src="/foo" p1="v1" p2="v2">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default', 'attributes' => ['p1' => 'v1', 'p2' => 'v2']])->getContent());
 
         // with id & attributes
         $strategy = new HIncludeFragmentRenderer();
-        $this->assertEquals('<hx:include src="/foo" p1="v1" p2="v2" id="bar">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default', 'id' => 'bar', 'attributes' => array('p1' => 'v1', 'p2' => 'v2')))->getContent());
+        $this->assertEquals('<hx:include src="/foo" p1="v1" p2="v2" id="bar">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default', 'id' => 'bar', 'attributes' => ['p1' => 'v1', 'p2' => 'v2']])->getContent());
     }
 
     public function testRenderWithDefaultText()
@@ -84,7 +84,7 @@ class HIncludeFragmentRendererTest extends TestCase
 
         // only default
         $strategy = new HIncludeFragmentRenderer($engine);
-        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'default'))->getContent());
+        $this->assertEquals('<hx:include src="/foo">default</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'default'])->getContent());
     }
 
     public function testRenderWithEngineAndDefaultText()
@@ -97,6 +97,6 @@ class HIncludeFragmentRendererTest extends TestCase
 
         // only default
         $strategy = new HIncludeFragmentRenderer($engine);
-        $this->assertEquals('<hx:include src="/foo">loading...</hx:include>', $strategy->render('/foo', Request::create('/'), array('default' => 'loading...'))->getContent());
+        $this->assertEquals('<hx:include src="/foo">loading...</hx:include>', $strategy->render('/foo', Request::create('/'), ['default' => 'loading...'])->getContent());
     }
 }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
index ceaa249ab6..155493d7f4 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php
@@ -34,7 +34,7 @@ class InlineFragmentRendererTest extends TestCase
     {
         $strategy = new InlineFragmentRenderer($this->getKernel($this->returnValue(new Response('foo'))));
 
-        $this->assertEquals('foo', $strategy->render(new ControllerReference('main_controller', array(), array()), Request::create('/'))->getContent());
+        $this->assertEquals('foo', $strategy->render(new ControllerReference('main_controller', [], []), Request::create('/'))->getContent());
     }
 
     public function testRenderWithObjectsAsAttributes()
@@ -42,29 +42,29 @@ class InlineFragmentRendererTest extends TestCase
         $object = new \stdClass();
 
         $subRequest = Request::create('/_fragment?_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dmain_controller');
-        $subRequest->attributes->replace(array('object' => $object, '_format' => 'html', '_controller' => 'main_controller', '_locale' => 'en'));
-        $subRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
-        $subRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $subRequest->attributes->replace(['object' => $object, '_format' => 'html', '_controller' => 'main_controller', '_locale' => 'en']);
+        $subRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
+        $subRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $subRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         $subRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($subRequest));
 
-        $this->assertSame('foo', $strategy->render(new ControllerReference('main_controller', array('object' => $object), array()), Request::create('/'))->getContent());
+        $this->assertSame('foo', $strategy->render(new ControllerReference('main_controller', ['object' => $object], []), Request::create('/'))->getContent());
     }
 
     public function testRenderWithTrustedHeaderDisabled()
     {
-        Request::setTrustedProxies(array(), 0);
+        Request::setTrustedProxies([], 0);
 
         $expectedSubRequest = Request::create('/');
-        $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
+        $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
         $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($expectedSubRequest));
         $this->assertSame('foo', $strategy->render('/', Request::create('/'))->getContent());
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     /**
@@ -87,7 +87,7 @@ class InlineFragmentRendererTest extends TestCase
 
         $strategy = new InlineFragmentRenderer($this->getKernel($this->throwException(new \RuntimeException('foo'))), $dispatcher);
 
-        $this->assertEmpty($strategy->render('/', Request::create('/'), array('ignore_errors' => true))->getContent());
+        $this->assertEmpty($strategy->render('/', Request::create('/'), ['ignore_errors' => true])->getContent());
     }
 
     public function testRenderExceptionIgnoreErrorsWithAlt()
@@ -97,7 +97,7 @@ class InlineFragmentRendererTest extends TestCase
             $this->returnValue(new Response('bar'))
         )));
 
-        $this->assertEquals('bar', $strategy->render('/', Request::create('/'), array('ignore_errors' => true, 'alt' => '/foo'))->getContent());
+        $this->assertEquals('bar', $strategy->render('/', Request::create('/'), ['ignore_errors' => true, 'alt' => '/foo'])->getContent());
     }
 
     private function getKernel($returnValue)
@@ -129,7 +129,7 @@ class InlineFragmentRendererTest extends TestCase
         $argumentResolver
             ->expects($this->once())
             ->method('getArguments')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $kernel = new HttpKernel(new EventDispatcher(), $controllerResolver, new RequestStack(), $argumentResolver);
@@ -140,7 +140,7 @@ class InlineFragmentRendererTest extends TestCase
         echo 'Foo';
 
         // simulate a sub-request with output buffering and an exception
-        $renderer->render('/', Request::create('/'), array('ignore_errors' => true));
+        $renderer->render('/', Request::create('/'), ['ignore_errors' => true]);
 
         $this->assertEquals('Foo', ob_get_clean());
     }
@@ -151,10 +151,10 @@ class InlineFragmentRendererTest extends TestCase
         $expectedSubRequest->attributes->set('_format', 'foo');
         $expectedSubRequest->setLocale('fr');
         if (Request::HEADER_X_FORWARDED_FOR & Request::getTrustedHeaderSet()) {
-            $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
+            $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
             $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         }
-        $expectedSubRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $expectedSubRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $expectedSubRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($expectedSubRequest));
@@ -171,10 +171,10 @@ class InlineFragmentRendererTest extends TestCase
         $expectedSubRequest->headers->set('Surrogate-Capability', 'abc="ESI/1.0"');
 
         if (Request::HEADER_X_FORWARDED_FOR & Request::getTrustedHeaderSet()) {
-            $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
+            $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
             $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         }
-        $expectedSubRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $expectedSubRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $expectedSubRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($expectedSubRequest));
@@ -186,35 +186,35 @@ class InlineFragmentRendererTest extends TestCase
 
     public function testESIHeaderIsKeptInSubrequestWithTrustedHeaderDisabled()
     {
-        Request::setTrustedProxies(array(), Request::HEADER_FORWARDED);
+        Request::setTrustedProxies([], Request::HEADER_FORWARDED);
 
         $this->testESIHeaderIsKeptInSubrequest();
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     public function testHeadersPossiblyResultingIn304AreNotAssignedToSubrequest()
     {
         $expectedSubRequest = Request::create('/');
-        $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
-        $expectedSubRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
+        $expectedSubRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         $expectedSubRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($expectedSubRequest));
-        $request = Request::create('/', 'GET', array(), array(), array(), array('HTTP_IF_MODIFIED_SINCE' => 'Fri, 01 Jan 2016 00:00:00 GMT', 'HTTP_IF_NONE_MATCH' => '*'));
+        $request = Request::create('/', 'GET', [], [], [], ['HTTP_IF_MODIFIED_SINCE' => 'Fri, 01 Jan 2016 00:00:00 GMT', 'HTTP_IF_NONE_MATCH' => '*']);
         $strategy->render('/', $request);
     }
 
     public function testFirstTrustedProxyIsSetAsRemote()
     {
-        Request::setTrustedProxies(array('1.1.1.1'), -1);
+        Request::setTrustedProxies(['1.1.1.1'], -1);
 
         $expectedSubRequest = Request::create('/');
         $expectedSubRequest->headers->set('Surrogate-Capability', 'abc="ESI/1.0"');
         $expectedSubRequest->server->set('REMOTE_ADDR', '127.0.0.1');
-        $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
-        $expectedSubRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
+        $expectedSubRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         $expectedSubRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
@@ -224,7 +224,7 @@ class InlineFragmentRendererTest extends TestCase
         $request->headers->set('Surrogate-Capability', 'abc="ESI/1.0"');
         $strategy->render('/', $request);
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     public function testIpAddressOfRangedTrustedProxyIsSetAsRemote()
@@ -232,12 +232,12 @@ class InlineFragmentRendererTest extends TestCase
         $expectedSubRequest = Request::create('/');
         $expectedSubRequest->headers->set('Surrogate-Capability', 'abc="ESI/1.0"');
         $expectedSubRequest->server->set('REMOTE_ADDR', '127.0.0.1');
-        $expectedSubRequest->headers->set('x-forwarded-for', array('127.0.0.1'));
-        $expectedSubRequest->headers->set('forwarded', array('for="127.0.0.1";host="localhost";proto=http'));
+        $expectedSubRequest->headers->set('x-forwarded-for', ['127.0.0.1']);
+        $expectedSubRequest->headers->set('forwarded', ['for="127.0.0.1";host="localhost";proto=http']);
         $expectedSubRequest->server->set('HTTP_X_FORWARDED_FOR', '127.0.0.1');
         $expectedSubRequest->server->set('HTTP_FORWARDED', 'for="127.0.0.1";host="localhost";proto=http');
 
-        Request::setTrustedProxies(array('1.1.1.1/24'), -1);
+        Request::setTrustedProxies(['1.1.1.1/24'], -1);
 
         $strategy = new InlineFragmentRenderer($this->getKernelExpectingRequest($expectedSubRequest));
 
@@ -245,7 +245,7 @@ class InlineFragmentRendererTest extends TestCase
         $request->headers->set('Surrogate-Capability', 'abc="ESI/1.0"');
         $strategy->render('/', $request);
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     /**
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
index 3a040dedd6..c03e8c4a92 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/RoutableFragmentRendererTest.php
@@ -35,14 +35,14 @@ class RoutableFragmentRendererTest extends TestCase
 
     public function getGenerateFragmentUriData()
     {
-        return array(
-            array('/_fragment?_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array(), array())),
-            array('/_fragment?_path=_format%3Dxml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array('_format' => 'xml'), array())),
-            array('/_fragment?_path=foo%3Dfoo%26_format%3Djson%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => 'foo', '_format' => 'json'), array())),
-            array('/_fragment?bar=bar&_path=foo%3Dfoo%26_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => 'foo'), array('bar' => 'bar'))),
-            array('/_fragment?foo=foo&_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array(), array('foo' => 'foo'))),
-            array('/_fragment?_path=foo%255B0%255D%3Dfoo%26foo%255B1%255D%3Dbar%26_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', array('foo' => array('foo', 'bar')), array())),
-        );
+        return [
+            ['/_fragment?_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', [], [])],
+            ['/_fragment?_path=_format%3Dxml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', ['_format' => 'xml'], [])],
+            ['/_fragment?_path=foo%3Dfoo%26_format%3Djson%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', ['foo' => 'foo', '_format' => 'json'], [])],
+            ['/_fragment?bar=bar&_path=foo%3Dfoo%26_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', ['foo' => 'foo'], ['bar' => 'bar'])],
+            ['/_fragment?foo=foo&_path=_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', [], ['foo' => 'foo'])],
+            ['/_fragment?_path=foo%255B0%255D%3Dfoo%26foo%255B1%255D%3Dbar%26_format%3Dhtml%26_locale%3Den%26_controller%3Dcontroller', new ControllerReference('controller', ['foo' => ['foo', 'bar']], [])],
+        ];
     }
 
     public function testGenerateFragmentUriWithARequest()
@@ -50,7 +50,7 @@ class RoutableFragmentRendererTest extends TestCase
         $request = Request::create('/');
         $request->attributes->set('_format', 'json');
         $request->setLocale('fr');
-        $controller = new ControllerReference('controller', array(), array());
+        $controller = new ControllerReference('controller', [], []);
 
         $this->assertEquals('/_fragment?_path=_format%3Djson%26_locale%3Dfr%26_controller%3Dcontroller', $this->callGenerateFragmentUriMethod($controller, $request));
     }
@@ -66,10 +66,10 @@ class RoutableFragmentRendererTest extends TestCase
 
     public function getGenerateFragmentUriDataWithNonScalar()
     {
-        return array(
-            array(new ControllerReference('controller', array('foo' => new Foo(), 'bar' => 'bar'), array())),
-            array(new ControllerReference('controller', array('foo' => array('foo' => 'foo'), 'bar' => array('bar' => new Foo())), array())),
-        );
+        return [
+            [new ControllerReference('controller', ['foo' => new Foo(), 'bar' => 'bar'], [])],
+            [new ControllerReference('controller', ['foo' => ['foo' => 'foo'], 'bar' => ['bar' => new Foo()]], [])],
+        ];
     }
 
     private function callGenerateFragmentUriMethod(ControllerReference $reference, Request $request, $absolute = false)
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php b/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
index ff98fd2616..b2181725ed 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Fragment/SsiFragmentRendererTest.php
@@ -35,7 +35,7 @@ class SsiFragmentRendererTest extends TestCase
         $request->headers->set('Surrogate-Capability', 'SSI/1.0');
 
         $this->assertEquals('<!--#include virtual="/" -->', $strategy->render('/', $request)->getContent());
-        $this->assertEquals('<!--#include virtual="/" -->', $strategy->render('/', $request, array('comment' => 'This is a comment'))->getContent(), 'Strategy options should not impact the ssi include tag');
+        $this->assertEquals('<!--#include virtual="/" -->', $strategy->render('/', $request, ['comment' => 'This is a comment'])->getContent(), 'Strategy options should not impact the ssi include tag');
     }
 
     public function testRenderControllerReference()
@@ -47,12 +47,12 @@ class SsiFragmentRendererTest extends TestCase
         $request->setLocale('fr');
         $request->headers->set('Surrogate-Capability', 'SSI/1.0');
 
-        $reference = new ControllerReference('main_controller', array(), array());
-        $altReference = new ControllerReference('alt_controller', array(), array());
+        $reference = new ControllerReference('main_controller', [], []);
+        $altReference = new ControllerReference('alt_controller', [], []);
 
         $this->assertEquals(
             '<!--#include virtual="/_fragment?_hash=Jz1P8NErmhKTeI6onI1EdAXTB85359MY3RIk5mSJ60w%3D&_path=_format%3Dhtml%26_locale%3Dfr%26_controller%3Dmain_controller" -->',
-            $strategy->render($reference, $request, array('alt' => $altReference))->getContent()
+            $strategy->render($reference, $request, ['alt' => $altReference])->getContent()
         );
     }
 
@@ -81,7 +81,7 @@ class SsiFragmentRendererTest extends TestCase
         $request->setLocale('fr');
         $request->headers->set('Surrogate-Capability', 'SSI/1.0');
 
-        $strategy->render('/', $request, array('alt' => new ControllerReference('alt_controller')));
+        $strategy->render('/', $request, ['alt' => new ControllerReference('alt_controller')]);
     }
 
     private function getInlineStrategy($called = false)
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
index 846caee4cc..2049a1771a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/EsiTest.php
@@ -220,13 +220,13 @@ class EsiTest extends TestCase
         $response1 = new Response('foo');
         $response1->setStatusCode(404);
         $response2 = new Response('bar');
-        $cache = $this->getCache(Request::create('/'), array($response1, $response2));
+        $cache = $this->getCache(Request::create('/'), [$response1, $response2]);
         $this->assertEquals('bar', $esi->handle($cache, '/', '/alt', false));
     }
 
     protected function getCache($request, $response)
     {
-        $cache = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpCache\HttpCache')->setMethods(array('getRequest', 'handle'))->disableOriginalConstructor()->getMock();
+        $cache = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpCache\HttpCache')->setMethods(['getRequest', 'handle'])->disableOriginalConstructor()->getMock();
         $cache->expects($this->any())
               ->method('getRequest')
               ->will($this->returnValue($request))
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
index a41d866508..7b3cac78c7 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTest.php
@@ -39,7 +39,7 @@ class HttpCacheTest extends HttpCacheTestCase
         // implements TerminableInterface
         $kernelMock = $this->getMockBuilder('Symfony\\Component\\HttpKernel\\Kernel')
             ->disableOriginalConstructor()
-            ->setMethods(array('terminate', 'registerBundles', 'registerContainerConfiguration'))
+            ->setMethods(['terminate', 'registerBundles', 'registerContainerConfiguration'])
             ->getMock();
 
         $kernelMock->expects($this->once())
@@ -61,7 +61,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testInvalidatesOnPostPutDeleteRequests()
     {
-        foreach (array('post', 'put', 'delete') as $method) {
+        foreach (['post', 'put', 'delete'] as $method) {
             $this->setNextResponse(200);
             $this->request($method, '/');
 
@@ -74,8 +74,8 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testDoesNotCacheWithAuthorizationRequestHeaderAndNonPublicResponse()
     {
-        $this->setNextResponse(200, array('ETag' => '"Foo"'));
-        $this->request('GET', '/', array('HTTP_AUTHORIZATION' => 'basic foobarbaz'));
+        $this->setNextResponse(200, ['ETag' => '"Foo"']);
+        $this->request('GET', '/', ['HTTP_AUTHORIZATION' => 'basic foobarbaz']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertResponseOk();
@@ -88,8 +88,8 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testDoesCacheWithAuthorizationRequestHeaderAndPublicResponse()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'ETag' => '"Foo"'));
-        $this->request('GET', '/', array('HTTP_AUTHORIZATION' => 'basic foobarbaz'));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'ETag' => '"Foo"']);
+        $this->request('GET', '/', ['HTTP_AUTHORIZATION' => 'basic foobarbaz']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertResponseOk();
@@ -101,8 +101,8 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testDoesNotCacheWithCookieHeaderAndNonPublicResponse()
     {
-        $this->setNextResponse(200, array('ETag' => '"Foo"'));
-        $this->request('GET', '/', array(), array('foo' => 'bar'));
+        $this->setNextResponse(200, ['ETag' => '"Foo"']);
+        $this->request('GET', '/', [], ['foo' => 'bar']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertResponseOk();
@@ -115,7 +115,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testDoesNotCacheRequestsWithACookieHeader()
     {
         $this->setNextResponse(200);
-        $this->request('GET', '/', array(), array('foo' => 'bar'));
+        $this->request('GET', '/', [], ['foo' => 'bar']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertResponseOk();
@@ -129,8 +129,8 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time());
 
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Last-Modified' => $time->format(DATE_RFC2822), 'Content-Type' => 'text/plain'), 'Hello World');
-        $this->request('GET', '/', array('HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Last-Modified' => $time->format(DATE_RFC2822), 'Content-Type' => 'text/plain'], 'Hello World');
+        $this->request('GET', '/', ['HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)]);
 
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(304, $this->response->getStatusCode());
@@ -142,8 +142,8 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testRespondsWith304WhenIfNoneMatchMatchesETag()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'ETag' => '12345', 'Content-Type' => 'text/plain'), 'Hello World');
-        $this->request('GET', '/', array('HTTP_IF_NONE_MATCH' => '12345'));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'ETag' => '12345', 'Content-Type' => 'text/plain'], 'Hello World');
+        $this->request('GET', '/', ['HTTP_IF_NONE_MATCH' => '12345']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(304, $this->response->getStatusCode());
@@ -158,7 +158,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time());
 
-        $this->setNextResponse(200, array(), '', function ($request, $response) use ($time) {
+        $this->setNextResponse(200, [], '', function ($request, $response) use ($time) {
             $response->setStatusCode(200);
             $response->headers->set('ETag', '12345');
             $response->headers->set('Last-Modified', $time->format(DATE_RFC2822));
@@ -168,17 +168,17 @@ class HttpCacheTest extends HttpCacheTestCase
 
         // only ETag matches
         $t = \DateTime::createFromFormat('U', time() - 3600);
-        $this->request('GET', '/', array('HTTP_IF_NONE_MATCH' => '12345', 'HTTP_IF_MODIFIED_SINCE' => $t->format(DATE_RFC2822)));
+        $this->request('GET', '/', ['HTTP_IF_NONE_MATCH' => '12345', 'HTTP_IF_MODIFIED_SINCE' => $t->format(DATE_RFC2822)]);
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(200, $this->response->getStatusCode());
 
         // only Last-Modified matches
-        $this->request('GET', '/', array('HTTP_IF_NONE_MATCH' => '1234', 'HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)));
+        $this->request('GET', '/', ['HTTP_IF_NONE_MATCH' => '1234', 'HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)]);
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(200, $this->response->getStatusCode());
 
         // Both matches
-        $this->request('GET', '/', array('HTTP_IF_NONE_MATCH' => '12345', 'HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)));
+        $this->request('GET', '/', ['HTTP_IF_NONE_MATCH' => '12345', 'HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)]);
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(304, $this->response->getStatusCode());
     }
@@ -187,10 +187,10 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $this->setNextResponse(
             200,
-            array(
+            [
                 'ETag' => '1234',
                 'Cache-Control' => 'public, s-maxage=60',
-            )
+            ]
         );
 
         $this->request('GET', '/');
@@ -210,7 +210,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testValidatesPrivateResponsesCachedOnTheClient()
     {
-        $this->setNextResponse(200, array(), '', function ($request, $response) {
+        $this->setNextResponse(200, [], '', function ($request, $response) {
             $etags = preg_split('/\s*,\s*/', $request->headers->get('IF_NONE_MATCH'));
             if ($request->cookies->has('authenticated')) {
                 $response->headers->set('Cache-Control', 'private, no-store');
@@ -243,7 +243,7 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertTraceContains('miss');
         $this->assertTraceContains('store');
 
-        $this->request('GET', '/', array(), array('authenticated' => ''));
+        $this->request('GET', '/', [], ['authenticated' => '']);
         $this->assertHttpKernelIsCalled();
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('"private tag"', $this->response->headers->get('ETag'));
@@ -257,8 +257,8 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
 
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)));
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'no-cache'));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)]);
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'no-cache']);
 
         $this->assertHttpKernelIsCalled();
         $this->assertTraceContains('store');
@@ -269,7 +269,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $count = 0;
 
-        $this->setNextResponse(200, array('Cache-Control' => 'public, max-age=10000'), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, ['Cache-Control' => 'public, max-age=10000'], '', function ($request, $response) use (&$count) {
             ++$count;
             $response->setContent(1 == $count ? 'Hello World' : 'Goodbye World');
         });
@@ -285,7 +285,7 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertTraceContains('fresh');
 
         $this->cacheConfig['allow_reload'] = true;
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'no-cache'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'no-cache']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Goodbye World', $this->response->getContent());
         $this->assertTraceContains('reload');
@@ -296,7 +296,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $count = 0;
 
-        $this->setNextResponse(200, array('Cache-Control' => 'public, max-age=10000'), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, ['Cache-Control' => 'public, max-age=10000'], '', function ($request, $response) use (&$count) {
             ++$count;
             $response->setContent(1 == $count ? 'Hello World' : 'Goodbye World');
         });
@@ -312,12 +312,12 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertTraceContains('fresh');
 
         $this->cacheConfig['allow_reload'] = false;
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'no-cache'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'no-cache']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Hello World', $this->response->getContent());
         $this->assertTraceNotContains('reload');
 
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'no-cache'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'no-cache']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Hello World', $this->response->getContent());
         $this->assertTraceNotContains('reload');
@@ -327,7 +327,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $count = 0;
 
-        $this->setNextResponse(200, array(), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, [], '', function ($request, $response) use (&$count) {
             ++$count;
             $response->headers->set('Cache-Control', 'public, max-age=10000');
             $response->setETag($count);
@@ -345,7 +345,7 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertTraceContains('fresh');
 
         $this->cacheConfig['allow_revalidate'] = true;
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'max-age=0'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'max-age=0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Goodbye World', $this->response->getContent());
         $this->assertTraceContains('stale');
@@ -357,7 +357,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $count = 0;
 
-        $this->setNextResponse(200, array(), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, [], '', function ($request, $response) use (&$count) {
             ++$count;
             $response->headers->set('Cache-Control', 'public, max-age=10000');
             $response->setETag($count);
@@ -375,14 +375,14 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertTraceContains('fresh');
 
         $this->cacheConfig['allow_revalidate'] = false;
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'max-age=0'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'max-age=0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Hello World', $this->response->getContent());
         $this->assertTraceNotContains('stale');
         $this->assertTraceNotContains('invalid');
         $this->assertTraceContains('fresh');
 
-        $this->request('GET', '/', array('HTTP_CACHE_CONTROL' => 'max-age=0'));
+        $this->request('GET', '/', ['HTTP_CACHE_CONTROL' => 'max-age=0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Hello World', $this->response->getContent());
         $this->assertTraceNotContains('stale');
@@ -393,7 +393,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testFetchesResponseFromBackendWhenCacheMisses()
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)]);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -405,7 +405,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         foreach (array_merge(range(201, 202), range(204, 206), range(303, 305), range(400, 403), range(405, 409), range(411, 417), range(500, 505)) as $code) {
             $time = \DateTime::createFromFormat('U', time() + 5);
-            $this->setNextResponse($code, array('Expires' => $time->format(DATE_RFC2822)));
+            $this->setNextResponse($code, ['Expires' => $time->format(DATE_RFC2822)]);
 
             $this->request('GET', '/');
             $this->assertEquals($code, $this->response->getStatusCode());
@@ -417,7 +417,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testDoesNotCacheResponsesWithExplicitNoStoreDirective()
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Expires' => $time->format(DATE_RFC2822), 'Cache-Control' => 'no-store'));
+        $this->setNextResponse(200, ['Expires' => $time->format(DATE_RFC2822), 'Cache-Control' => 'no-store']);
 
         $this->request('GET', '/');
         $this->assertTraceNotContains('store');
@@ -436,7 +436,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testCachesResponsesWithExplicitNoCacheDirective()
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Expires' => $time->format(DATE_RFC2822), 'Cache-Control' => 'public, no-cache'));
+        $this->setNextResponse(200, ['Expires' => $time->format(DATE_RFC2822), 'Cache-Control' => 'public, no-cache']);
 
         $this->request('GET', '/');
         $this->assertTraceContains('store');
@@ -446,7 +446,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testCachesResponsesWithAnExpirationHeader()
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)]);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -462,7 +462,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testCachesResponsesWithAMaxAgeDirective()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'public, max-age=5'));
+        $this->setNextResponse(200, ['Cache-Control' => 'public, max-age=5']);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -478,7 +478,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testCachesResponsesWithASMaxAgeDirective()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 's-maxage=5'));
+        $this->setNextResponse(200, ['Cache-Control' => 's-maxage=5']);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -495,7 +495,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testCachesResponsesWithALastModifiedValidatorButNoFreshnessInformation()
     {
         $time = \DateTime::createFromFormat('U', time());
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Last-Modified' => $time->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Last-Modified' => $time->format(DATE_RFC2822)]);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -506,7 +506,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testCachesResponsesWithAnETagValidatorButNoFreshnessInformation()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'ETag' => '"123456"'));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'ETag' => '"123456"']);
 
         $this->request('GET', '/');
         $this->assertEquals(200, $this->response->getStatusCode());
@@ -519,7 +519,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time1 = \DateTime::createFromFormat('U', time() - 5);
         $time2 = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Date' => $time1->format(DATE_RFC2822), 'Expires' => $time2->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Date' => $time1->format(DATE_RFC2822), 'Expires' => $time2->format(DATE_RFC2822)]);
 
         $this->request('GET', '/');
         $this->assertHttpKernelIsCalled();
@@ -543,7 +543,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testHitsCachedResponseWithMaxAgeDirective()
     {
         $time = \DateTime::createFromFormat('U', time() - 5);
-        $this->setNextResponse(200, array('Date' => $time->format(DATE_RFC2822), 'Cache-Control' => 'public, max-age=10'));
+        $this->setNextResponse(200, ['Date' => $time->format(DATE_RFC2822), 'Cache-Control' => 'public, max-age=10']);
 
         $this->request('GET', '/');
         $this->assertHttpKernelIsCalled();
@@ -573,7 +573,7 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->cacheConfig['stale_while_revalidate'] = 10;
 
         // The prescence of Last-Modified makes this cacheable (because Response::isValidateable() then).
-        $this->setNextResponse(200, array('Cache-Control' => 'public, s-maxage=5', 'Last-Modified' => 'some while ago'), 'Old response');
+        $this->setNextResponse(200, ['Cache-Control' => 'public, s-maxage=5', 'Last-Modified' => 'some while ago'], 'Old response');
         $this->request('GET', '/'); // warm the cache
 
         // Now, lock the cache
@@ -607,7 +607,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testHitsCachedResponseWithSMaxAgeDirective()
     {
         $time = \DateTime::createFromFormat('U', time() - 5);
-        $this->setNextResponse(200, array('Date' => $time->format(DATE_RFC2822), 'Cache-Control' => 's-maxage=10, max-age=0'));
+        $this->setNextResponse(200, ['Date' => $time->format(DATE_RFC2822), 'Cache-Control' => 's-maxage=10, max-age=0']);
 
         $this->request('GET', '/');
         $this->assertHttpKernelIsCalled();
@@ -752,7 +752,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testDoesNotAssignDefaultTtlWhenResponseHasMustRevalidateDirective()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'must-revalidate'));
+        $this->setNextResponse(200, ['Cache-Control' => 'must-revalidate']);
 
         $this->cacheConfig['default_ttl'] = 10;
         $this->request('GET', '/');
@@ -767,7 +767,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testFetchesFullResponseWhenCacheStaleAndNoValidatorsPresent()
     {
         $time = \DateTime::createFromFormat('U', time() + 5);
-        $this->setNextResponse(200, array('Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)));
+        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Expires' => $time->format(DATE_RFC2822)]);
 
         // build initial request
         $this->request('GET', '/');
@@ -807,7 +807,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testValidatesCachedResponsesWithLastModifiedAndNoFreshnessInformation()
     {
         $time = \DateTime::createFromFormat('U', time());
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) use ($time) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) use ($time) {
             $response->headers->set('Cache-Control', 'public');
             $response->headers->set('Last-Modified', $time->format(DATE_RFC2822));
             if ($time->format(DATE_RFC2822) == $request->headers->get('IF_MODIFIED_SINCE')) {
@@ -845,7 +845,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $test = $this;
 
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) use ($test) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) use ($test) {
             $test->assertSame('OPTIONS', $request->getMethod());
         });
 
@@ -858,7 +858,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testValidatesCachedResponsesWithETagAndNoFreshnessInformation()
     {
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) {
             $response->headers->set('Cache-Control', 'public');
             $response->headers->set('ETag', '"12345"');
             if ($response->getETag() == $request->headers->get('IF_NONE_MATCH')) {
@@ -895,7 +895,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time());
 
-        $this->setNextResponse(200, array(), 'Hello World', function (Request $request, Response $response) use ($time) {
+        $this->setNextResponse(200, [], 'Hello World', function (Request $request, Response $response) use ($time) {
             $response->setSharedMaxAge(10);
             $response->headers->set('Last-Modified', $time->format(DATE_RFC2822));
         });
@@ -913,7 +913,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
         sleep(15); // expire the cache
 
-        $this->setNextResponse(304, array(), '', function (Request $request, Response $response) use ($time) {
+        $this->setNextResponse(304, [], '', function (Request $request, Response $response) use ($time) {
             $this->assertEquals($time->format(DATE_RFC2822), $request->headers->get('IF_MODIFIED_SINCE'));
         });
 
@@ -929,7 +929,7 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time());
         $count = 0;
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) use ($time, &$count) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) use ($time, &$count) {
             $response->headers->set('Last-Modified', $time->format(DATE_RFC2822));
             $response->headers->set('Cache-Control', 'public');
             switch (++$count) {
@@ -966,20 +966,20 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testPassesHeadRequestsThroughDirectlyOnPass()
     {
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) {
             $response->setContent('');
             $response->setStatusCode(200);
             $this->assertEquals('HEAD', $request->getMethod());
         });
 
-        $this->request('HEAD', '/', array('HTTP_EXPECT' => 'something ...'));
+        $this->request('HEAD', '/', ['HTTP_EXPECT' => 'something ...']);
         $this->assertHttpKernelIsCalled();
         $this->assertEquals('', $this->response->getContent());
     }
 
     public function testUsesCacheToRespondToHeadRequestsWhenFresh()
     {
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) {
             $response->headers->set('Cache-Control', 'public, max-age=10');
             $response->setContent('Hello World');
             $response->setStatusCode(200);
@@ -1000,7 +1000,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testSendsNoContentWhenFresh()
     {
         $time = \DateTime::createFromFormat('U', time());
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) use ($time) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) use ($time) {
             $response->headers->set('Cache-Control', 'public, max-age=10');
             $response->headers->set('Last-Modified', $time->format(DATE_RFC2822));
         });
@@ -1009,7 +1009,7 @@ class HttpCacheTest extends HttpCacheTestCase
         $this->assertHttpKernelIsCalled();
         $this->assertEquals('Hello World', $this->response->getContent());
 
-        $this->request('GET', '/', array('HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)));
+        $this->request('GET', '/', ['HTTP_IF_MODIFIED_SINCE' => $time->format(DATE_RFC2822)]);
         $this->assertHttpKernelIsNotCalled();
         $this->assertEquals(304, $this->response->getStatusCode());
         $this->assertEquals('', $this->response->getContent());
@@ -1017,7 +1017,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testInvalidatesCachedResponsesOnPost()
     {
-        $this->setNextResponse(200, array(), 'Hello World', function ($request, $response) {
+        $this->setNextResponse(200, [], 'Hello World', function ($request, $response) {
             if ('GET' == $request->getMethod()) {
                 $response->setStatusCode(200);
                 $response->headers->set('Cache-Control', 'public, max-age=500');
@@ -1066,20 +1066,20 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testServesFromCacheWhenHeadersMatch()
     {
         $count = 0;
-        $this->setNextResponse(200, array('Cache-Control' => 'max-age=10000'), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, ['Cache-Control' => 'max-age=10000'], '', function ($request, $response) use (&$count) {
             $response->headers->set('Vary', 'Accept User-Agent Foo');
             $response->headers->set('Cache-Control', 'public, max-age=10');
             $response->headers->set('X-Response-Count', ++$count);
             $response->setContent($request->headers->get('USER_AGENT'));
         });
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Bob/1.0', $this->response->getContent());
         $this->assertTraceContains('miss');
         $this->assertTraceContains('store');
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Bob/1.0', $this->response->getContent());
         $this->assertTraceContains('fresh');
@@ -1090,36 +1090,36 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testStoresMultipleResponsesWhenHeadersDiffer()
     {
         $count = 0;
-        $this->setNextResponse(200, array('Cache-Control' => 'max-age=10000'), '', function ($request, $response) use (&$count) {
+        $this->setNextResponse(200, ['Cache-Control' => 'max-age=10000'], '', function ($request, $response) use (&$count) {
             $response->headers->set('Vary', 'Accept User-Agent Foo');
             $response->headers->set('Cache-Control', 'public, max-age=10');
             $response->headers->set('X-Response-Count', ++$count);
             $response->setContent($request->headers->get('USER_AGENT'));
         });
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertEquals('Bob/1.0', $this->response->getContent());
         $this->assertEquals(1, $this->response->headers->get('X-Response-Count'));
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/2.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/2.0']);
         $this->assertEquals(200, $this->response->getStatusCode());
         $this->assertTraceContains('miss');
         $this->assertTraceContains('store');
         $this->assertEquals('Bob/2.0', $this->response->getContent());
         $this->assertEquals(2, $this->response->headers->get('X-Response-Count'));
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/1.0']);
         $this->assertTraceContains('fresh');
         $this->assertEquals('Bob/1.0', $this->response->getContent());
         $this->assertEquals(1, $this->response->headers->get('X-Response-Count'));
 
-        $this->request('GET', '/', array('HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/2.0'));
+        $this->request('GET', '/', ['HTTP_ACCEPT' => 'text/html', 'HTTP_USER_AGENT' => 'Bob/2.0']);
         $this->assertTraceContains('fresh');
         $this->assertEquals('Bob/2.0', $this->response->getContent());
         $this->assertEquals(2, $this->response->headers->get('X-Response-Count'));
 
-        $this->request('GET', '/', array('HTTP_USER_AGENT' => 'Bob/2.0'));
+        $this->request('GET', '/', ['HTTP_USER_AGENT' => 'Bob/2.0']);
         $this->assertTraceContains('miss');
         $this->assertEquals('Bob/2.0', $this->response->getContent());
         $this->assertEquals(3, $this->response->headers->get('X-Response-Count'));
@@ -1141,7 +1141,7 @@ class HttpCacheTest extends HttpCacheTestCase
 
         $this->setNextResponse();
         $this->cacheConfig['allow_reload'] = true;
-        $this->request('GET', '/', array(), array(), false, array('Pragma' => 'no-cache'));
+        $this->request('GET', '/', [], [], false, ['Pragma' => 'no-cache']);
 
         $this->assertExceptionsAreCaught();
     }
@@ -1158,30 +1158,30 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testEsiCacheSendsTheLowestTtl()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/foo" /> <esi:include src="/bar" />',
-                'headers' => array(
+                'headers' => [
                     'Cache-Control' => 's-maxage=300',
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hello World!',
-                'headers' => array('Cache-Control' => 's-maxage=200'),
-            ),
-            array(
+                'headers' => ['Cache-Control' => 's-maxage=200'],
+            ],
+            [
                 'status' => 200,
                 'body' => 'My name is Bobby.',
-                'headers' => array('Cache-Control' => 's-maxage=100'),
-            ),
-        );
+                'headers' => ['Cache-Control' => 's-maxage=100'],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('GET', '/', array(), array(), true);
+        $this->request('GET', '/', [], [], true);
         $this->assertEquals('Hello World! My name is Bobby.', $this->response->getContent());
 
         $this->assertEquals(100, $this->response->getTtl());
@@ -1189,25 +1189,25 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testEsiCacheSendsTheLowestTtlForHeadRequests()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => 'I am a long-lived master response, but I embed a short-lived resource: <esi:include src="/foo" />',
-                'headers' => array(
+                'headers' => [
                     'Cache-Control' => 's-maxage=300',
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'I am a short-lived resource',
-                'headers' => array('Cache-Control' => 's-maxage=100'),
-            ),
-        );
+                'headers' => ['Cache-Control' => 's-maxage=100'],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('HEAD', '/', array(), array(), true);
+        $this->request('HEAD', '/', [], [], true);
 
         $this->assertEmpty($this->response->getContent());
         $this->assertEquals(100, $this->response->getTtl());
@@ -1215,30 +1215,30 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testEsiCacheForceValidation()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/foo" /> <esi:include src="/bar" />',
-                'headers' => array(
+                'headers' => [
                     'Cache-Control' => 's-maxage=300',
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hello World!',
-                'headers' => array('ETag' => 'foobar'),
-            ),
-            array(
+                'headers' => ['ETag' => 'foobar'],
+            ],
+            [
                 'status' => 200,
                 'body' => 'My name is Bobby.',
-                'headers' => array('Cache-Control' => 's-maxage=100'),
-            ),
-        );
+                'headers' => ['Cache-Control' => 's-maxage=100'],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('GET', '/', array(), array(), true);
+        $this->request('GET', '/', [], [], true);
         $this->assertEquals('Hello World! My name is Bobby.', $this->response->getContent());
         $this->assertNull($this->response->getTtl());
         $this->assertTrue($this->response->mustRevalidate());
@@ -1248,25 +1248,25 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testEsiCacheForceValidationForHeadRequests()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => 'I am the master response and use expiration caching, but I embed another resource: <esi:include src="/foo" />',
-                'headers' => array(
+                'headers' => [
                     'Cache-Control' => 's-maxage=300',
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'I am the embedded resource and use validation caching',
-                'headers' => array('ETag' => 'foobar'),
-            ),
-        );
+                'headers' => ['ETag' => 'foobar'],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('HEAD', '/', array(), array(), true);
+        $this->request('HEAD', '/', [], [], true);
 
         // The response has been assembled from expiration and validation based resources
         // This can neither be cached nor revalidated, so it should be private/no cache
@@ -1279,50 +1279,50 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testEsiRecalculateContentLengthHeader()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/foo" />',
-                'headers' => array(
+                'headers' => [
                     'Content-Length' => 26,
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hello World!',
-                'headers' => array(),
-            ),
-        );
+                'headers' => [],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('GET', '/', array(), array(), true);
+        $this->request('GET', '/', [], [], true);
         $this->assertEquals('Hello World!', $this->response->getContent());
         $this->assertEquals(12, $this->response->headers->get('Content-Length'));
     }
 
     public function testEsiRecalculateContentLengthHeaderForHeadRequest()
     {
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/foo" />',
-                'headers' => array(
+                'headers' => [
                     'Content-Length' => 26,
                     'Surrogate-Control' => 'content="ESI/1.0"',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hello World!',
-                'headers' => array(),
-            ),
-        );
+                'headers' => [],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('HEAD', '/', array(), array(), true);
+        $this->request('HEAD', '/', [], [], true);
 
         // https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.13
         // "The Content-Length entity-header field indicates the size of the entity-body,
@@ -1336,7 +1336,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testClientIpIsAlwaysLocalhostForForwardedRequests()
     {
         $this->setNextResponse();
-        $this->request('GET', '/', array('REMOTE_ADDR' => '10.0.0.1'));
+        $this->request('GET', '/', ['REMOTE_ADDR' => '10.0.0.1']);
 
         $this->kernel->assert(function ($backendRequest) {
             $this->assertSame('127.0.0.1', $backendRequest->server->get('REMOTE_ADDR'));
@@ -1351,25 +1351,25 @@ class HttpCacheTest extends HttpCacheTestCase
         Request::setTrustedProxies($existing, Request::HEADER_X_FORWARDED_ALL);
 
         $this->setNextResponse();
-        $this->request('GET', '/', array('REMOTE_ADDR' => '10.0.0.1'));
+        $this->request('GET', '/', ['REMOTE_ADDR' => '10.0.0.1']);
         $this->assertSame($existing, Request::getTrustedProxies());
 
-        $existing = array_unique(array_merge($existing, array('127.0.0.1')));
+        $existing = array_unique(array_merge($existing, ['127.0.0.1']));
         $this->kernel->assert(function ($backendRequest) use ($existing) {
             $this->assertSame($existing, Request::getTrustedProxies());
             $this->assertsame('10.0.0.1', $backendRequest->getClientIp());
         });
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     public function getTrustedProxyData()
     {
-        return array(
-            array(array()),
-            array(array('10.0.0.2')),
-            array(array('10.0.0.2', '127.0.0.1')),
-        );
+        return [
+            [[]],
+            [['10.0.0.2']],
+            [['10.0.0.2', '127.0.0.1']],
+        ];
     }
 
     /**
@@ -1378,7 +1378,7 @@ class HttpCacheTest extends HttpCacheTestCase
     public function testForwarderHeaderForForwardedRequests($forwarded, $expected)
     {
         $this->setNextResponse();
-        $server = array('REMOTE_ADDR' => '10.0.0.1');
+        $server = ['REMOTE_ADDR' => '10.0.0.1'];
         if (null !== $forwarded) {
             Request::setTrustedProxies($server, -1);
             $server['HTTP_FORWARDED'] = $forwarded;
@@ -1389,42 +1389,42 @@ class HttpCacheTest extends HttpCacheTestCase
             $this->assertSame($expected, $backendRequest->headers->get('Forwarded'));
         });
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
     public function getForwardedData()
     {
-        return array(
-            array(null, 'for="10.0.0.1";host="localhost";proto=http'),
-            array('for=10.0.0.2', 'for="10.0.0.2";host="localhost";proto=http, for="10.0.0.1"'),
-            array('for=10.0.0.2, for=10.0.0.3', 'for="10.0.0.2";host="localhost";proto=http, for="10.0.0.3", for="10.0.0.1"'),
-        );
+        return [
+            [null, 'for="10.0.0.1";host="localhost";proto=http'],
+            ['for=10.0.0.2', 'for="10.0.0.2";host="localhost";proto=http, for="10.0.0.1"'],
+            ['for=10.0.0.2, for=10.0.0.3', 'for="10.0.0.2";host="localhost";proto=http, for="10.0.0.3", for="10.0.0.1"'],
+        ];
     }
 
     public function testEsiCacheRemoveValidationHeadersIfEmbeddedResponses()
     {
         $time = \DateTime::createFromFormat('U', time());
 
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/hey" />',
-                'headers' => array(
+                'headers' => [
                     'Surrogate-Control' => 'content="ESI/1.0"',
                     'ETag' => 'hey',
                     'Last-Modified' => $time->format(DATE_RFC2822),
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hey!',
-                'headers' => array(),
-            ),
-        );
+                'headers' => [],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('GET', '/', array(), array(), true);
+        $this->request('GET', '/', [], [], true);
         $this->assertNull($this->response->getETag());
         $this->assertNull($this->response->getLastModified());
     }
@@ -1433,26 +1433,26 @@ class HttpCacheTest extends HttpCacheTestCase
     {
         $time = \DateTime::createFromFormat('U', time());
 
-        $responses = array(
-            array(
+        $responses = [
+            [
                 'status' => 200,
                 'body' => '<esi:include src="/hey" />',
-                'headers' => array(
+                'headers' => [
                     'Surrogate-Control' => 'content="ESI/1.0"',
                     'ETag' => 'hey',
                     'Last-Modified' => $time->format(DATE_RFC2822),
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 'status' => 200,
                 'body' => 'Hey!',
-                'headers' => array(),
-            ),
-        );
+                'headers' => [],
+            ],
+        ];
 
         $this->setNextResponses($responses);
 
-        $this->request('HEAD', '/', array(), array(), true);
+        $this->request('HEAD', '/', [], [], true);
         $this->assertEmpty($this->response->getContent());
         $this->assertNull($this->response->getETag());
         $this->assertNull($this->response->getLastModified());
@@ -1460,11 +1460,11 @@ class HttpCacheTest extends HttpCacheTestCase
 
     public function testDoesNotCacheOptionsRequest()
     {
-        $this->setNextResponse(200, array('Cache-Control' => 'public, s-maxage=60'), 'get');
+        $this->setNextResponse(200, ['Cache-Control' => 'public, s-maxage=60'], 'get');
         $this->request('GET', '/');
         $this->assertHttpKernelIsCalled();
 
-        $this->setNextResponse(200, array('Cache-Control' => 'public, s-maxage=60'), 'options');
+        $this->setNextResponse(200, ['Cache-Control' => 'public, s-maxage=60'], 'options');
         $this->request('OPTIONS', '/');
         $this->assertHttpKernelIsCalled();
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
index b3aa2be2f0..1eb4617447 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/HttpCacheTestCase.php
@@ -41,12 +41,12 @@ class HttpCacheTestCase extends TestCase
 
         $this->cache = null;
         $this->esi = null;
-        $this->caches = array();
-        $this->cacheConfig = array();
+        $this->caches = [];
+        $this->cacheConfig = [];
 
         $this->request = null;
         $this->response = null;
-        $this->responses = array();
+        $this->responses = [];
 
         $this->catch = false;
 
@@ -112,7 +112,7 @@ class HttpCacheTestCase extends TestCase
         $this->assertFalse($this->kernel->isCatchingExceptions());
     }
 
-    public function request($method, $uri = '/', $server = array(), $cookies = array(), $esi = false, $headers = array())
+    public function request($method, $uri = '/', $server = [], $cookies = [], $esi = false, $headers = [])
     {
         if (null === $this->kernel) {
             throw new \LogicException('You must call setNextResponse() before calling request().');
@@ -126,7 +126,7 @@ class HttpCacheTestCase extends TestCase
 
         $this->esi = $esi ? new Esi() : null;
         $this->cache = new HttpCache($this->kernel, $this->store, $this->esi, $this->cacheConfig);
-        $this->request = Request::create($uri, $method, array(), $cookies, array(), $server);
+        $this->request = Request::create($uri, $method, [], $cookies, [], $server);
         $this->request->headers->add($headers);
 
         $this->response = $this->cache->handle($this->request, HttpKernelInterface::MASTER_REQUEST, $this->catch);
@@ -136,7 +136,7 @@ class HttpCacheTestCase extends TestCase
 
     public function getMetaStorageValues()
     {
-        $values = array();
+        $values = [];
         foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator(sys_get_temp_dir().'/http_cache/md', \RecursiveDirectoryIterator::SKIP_DOTS), \RecursiveIteratorIterator::LEAVES_ONLY) as $file) {
             $values[] = file_get_contents($file);
         }
@@ -145,7 +145,7 @@ class HttpCacheTestCase extends TestCase
     }
 
     // A basic response with 200 status code and a tiny body.
-    public function setNextResponse($statusCode = 200, array $headers = array(), $body = 'Hello World', \Closure $customizer = null)
+    public function setNextResponse($statusCode = 200, array $headers = [], $body = 'Hello World', \Closure $customizer = null)
     {
         $this->kernel = new TestHttpKernel($body, $statusCode, $headers, $customizer);
     }
@@ -168,7 +168,7 @@ class HttpCacheTestCase extends TestCase
 
         $fp = opendir($directory);
         while (false !== $file = readdir($fp)) {
-            if (!\in_array($file, array('.', '..'))) {
+            if (!\in_array($file, ['.', '..'])) {
                 if (is_link($directory.'/'.$file)) {
                     unlink($directory.'/'.$file);
                 } elseif (is_dir($directory.'/'.$file)) {
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
index 1f1fbf8499..2b9d352c7c 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SsiTest.php
@@ -187,13 +187,13 @@ class SsiTest extends TestCase
         $response1 = new Response('foo');
         $response1->setStatusCode(404);
         $response2 = new Response('bar');
-        $cache = $this->getCache(Request::create('/'), array($response1, $response2));
+        $cache = $this->getCache(Request::create('/'), [$response1, $response2]);
         $this->assertEquals('bar', $ssi->handle($cache, '/', '/alt', false));
     }
 
     protected function getCache($request, $response)
     {
-        $cache = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpCache\HttpCache')->setMethods(array('getRequest', 'handle'))->disableOriginalConstructor()->getMock();
+        $cache = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpCache\HttpCache')->setMethods(['getRequest', 'handle'])->disableOriginalConstructor()->getMock();
         $cache->expects($this->any())
               ->method('getRequest')
               ->will($this->returnValue($request))
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
index cef019167a..fc47ff2c88 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/StoreTest.php
@@ -29,7 +29,7 @@ class StoreTest extends TestCase
     protected function setUp()
     {
         $this->request = Request::create('/');
-        $this->response = new Response('hello world', 200, array());
+        $this->response = new Response('hello world', 200, []);
 
         HttpCacheTestCase::clearDirectory(sys_get_temp_dir().'/http_cache');
 
@@ -108,7 +108,7 @@ class StoreTest extends TestCase
 
     public function testDoesNotFindAnEntryWithLookupWhenNoneExists()
     {
-        $request = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
+        $request = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
 
         $this->assertNull($this->store->lookup($request));
     }
@@ -137,7 +137,7 @@ class StoreTest extends TestCase
         $this->storeSimpleEntry();
         $response = $this->store->lookup($this->request);
 
-        $this->assertEquals($response->headers->all(), array_merge(array('content-length' => 4, 'x-body-file' => array($this->getStorePath($response->headers->get('X-Content-Digest')))), $this->response->headers->all()));
+        $this->assertEquals($response->headers->all(), array_merge(['content-length' => 4, 'x-body-file' => [$this->getStorePath($response->headers->get('X-Content-Digest'))]], $this->response->headers->all()));
     }
 
     public function testRestoresResponseContentFromEntityStoreWithLookup()
@@ -165,9 +165,9 @@ class StoreTest extends TestCase
 
     public function testDoesNotReturnEntriesThatVaryWithLookup()
     {
-        $req1 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
-        $req2 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam'));
-        $res = new Response('test', 200, array('Vary' => 'Foo Bar'));
+        $req1 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
+        $req2 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam']);
+        $res = new Response('test', 200, ['Vary' => 'Foo Bar']);
         $this->store->write($req1, $res);
 
         $this->assertNull($this->store->lookup($req2));
@@ -175,9 +175,9 @@ class StoreTest extends TestCase
 
     public function testDoesNotReturnEntriesThatSlightlyVaryWithLookup()
     {
-        $req1 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
-        $req2 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bam'));
-        $res = new Response('test', 200, array('Vary' => array('Foo', 'Bar')));
+        $req1 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
+        $req2 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bam']);
+        $res = new Response('test', 200, ['Vary' => ['Foo', 'Bar']]);
         $this->store->write($req1, $res);
 
         $this->assertNull($this->store->lookup($req2));
@@ -185,16 +185,16 @@ class StoreTest extends TestCase
 
     public function testStoresMultipleResponsesForEachVaryCombination()
     {
-        $req1 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
-        $res1 = new Response('test 1', 200, array('Vary' => 'Foo Bar'));
+        $req1 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
+        $res1 = new Response('test 1', 200, ['Vary' => 'Foo Bar']);
         $key = $this->store->write($req1, $res1);
 
-        $req2 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam'));
-        $res2 = new Response('test 2', 200, array('Vary' => 'Foo Bar'));
+        $req2 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam']);
+        $res2 = new Response('test 2', 200, ['Vary' => 'Foo Bar']);
         $this->store->write($req2, $res2);
 
-        $req3 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Baz', 'HTTP_BAR' => 'Boom'));
-        $res3 = new Response('test 3', 200, array('Vary' => 'Foo Bar'));
+        $req3 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Baz', 'HTTP_BAR' => 'Boom']);
+        $res3 = new Response('test 3', 200, ['Vary' => 'Foo Bar']);
         $this->store->write($req3, $res3);
 
         $this->assertEquals($this->getStorePath('en'.hash('sha256', 'test 3')), $this->store->lookup($req3)->getContent());
@@ -206,18 +206,18 @@ class StoreTest extends TestCase
 
     public function testOverwritesNonVaryingResponseWithStore()
     {
-        $req1 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
-        $res1 = new Response('test 1', 200, array('Vary' => 'Foo Bar'));
+        $req1 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
+        $res1 = new Response('test 1', 200, ['Vary' => 'Foo Bar']);
         $key = $this->store->write($req1, $res1);
         $this->assertEquals($this->getStorePath('en'.hash('sha256', 'test 1')), $this->store->lookup($req1)->getContent());
 
-        $req2 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam'));
-        $res2 = new Response('test 2', 200, array('Vary' => 'Foo Bar'));
+        $req2 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Bling', 'HTTP_BAR' => 'Bam']);
+        $res2 = new Response('test 2', 200, ['Vary' => 'Foo Bar']);
         $this->store->write($req2, $res2);
         $this->assertEquals($this->getStorePath('en'.hash('sha256', 'test 2')), $this->store->lookup($req2)->getContent());
 
-        $req3 = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
-        $res3 = new Response('test 3', 200, array('Vary' => 'Foo Bar'));
+        $req3 = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
+        $res3 = new Response('test 3', 200, ['Vary' => 'Foo Bar']);
         $key = $this->store->write($req3, $res3);
         $this->assertEquals($this->getStorePath('en'.hash('sha256', 'test 3')), $this->store->lookup($req3)->getContent());
 
@@ -226,7 +226,7 @@ class StoreTest extends TestCase
 
     public function testLocking()
     {
-        $req = Request::create('/test', 'get', array(), array(), array(), array('HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar'));
+        $req = Request::create('/test', 'get', [], [], [], ['HTTP_FOO' => 'Foo', 'HTTP_BAR' => 'Bar']);
         $this->assertTrue($this->store->lock($req));
 
         $path = $this->store->lock($req);
@@ -263,14 +263,14 @@ class StoreTest extends TestCase
         $this->assertEmpty($this->getStoreMetadata($requestHttps));
     }
 
-    protected function storeSimpleEntry($path = null, $headers = array())
+    protected function storeSimpleEntry($path = null, $headers = [])
     {
         if (null === $path) {
             $path = '/test';
         }
 
-        $this->request = Request::create($path, 'get', array(), array(), array(), $headers);
-        $this->response = new Response('test', 200, array('Cache-Control' => 'max-age=420'));
+        $this->request = Request::create($path, 'get', [], [], [], $headers);
+        $this->response = new Response('test', 200, ['Cache-Control' => 'max-age=420']);
 
         return $this->store->write($this->request, $this->response);
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SubRequestHandlerTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SubRequestHandlerTest.php
index dfe0a734bf..67b637bfe3 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/SubRequestHandlerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/SubRequestHandlerTest.php
@@ -33,7 +33,7 @@ class SubRequestHandlerTest extends TestCase
 
     public function testTrustedHeadersAreKept()
     {
-        Request::setTrustedProxies(array('10.0.0.1'), -1);
+        Request::setTrustedProxies(['10.0.0.1'], -1);
         $globalState = $this->getGlobalState();
 
         $request = Request::create('/');
@@ -82,7 +82,7 @@ class SubRequestHandlerTest extends TestCase
 
     public function testTrustedForwardedHeader()
     {
-        Request::setTrustedProxies(array('10.0.0.1'), -1);
+        Request::setTrustedProxies(['10.0.0.1'], -1);
         $globalState = $this->getGlobalState();
 
         $request = Request::create('/');
@@ -104,7 +104,7 @@ class SubRequestHandlerTest extends TestCase
 
     public function testTrustedXForwardedForHeader()
     {
-        Request::setTrustedProxies(array('10.0.0.1'), -1);
+        Request::setTrustedProxies(['10.0.0.1'], -1);
         $globalState = $this->getGlobalState();
 
         $request = Request::create('/');
@@ -127,10 +127,10 @@ class SubRequestHandlerTest extends TestCase
 
     private function getGlobalState()
     {
-        return array(
+        return [
             Request::getTrustedProxies(),
             Request::getTrustedHeaderSet(),
-        );
+        ];
     }
 }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestHttpKernel.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestHttpKernel.php
index 5dbf02c992..304ff9d9e4 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestHttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestHttpKernel.php
@@ -41,7 +41,7 @@ class TestHttpKernel extends HttpKernel implements ControllerResolverInterface,
 
     public function assert(\Closure $callback)
     {
-        $trustedConfig = array(Request::getTrustedProxies(), Request::getTrustedHeaderSet());
+        $trustedConfig = [Request::getTrustedProxies(), Request::getTrustedHeaderSet()];
 
         list($trustedProxies, $trustedHeaderSet, $backendRequest) = $this->backendRequest;
         Request::setTrustedProxies($trustedProxies, $trustedHeaderSet);
@@ -57,7 +57,7 @@ class TestHttpKernel extends HttpKernel implements ControllerResolverInterface,
     public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = false)
     {
         $this->catch = $catch;
-        $this->backendRequest = array(Request::getTrustedProxies(), Request::getTrustedHeaderSet(), $request);
+        $this->backendRequest = [Request::getTrustedProxies(), Request::getTrustedHeaderSet(), $request];
 
         return parent::handle($request, $type, $catch);
     }
@@ -69,12 +69,12 @@ class TestHttpKernel extends HttpKernel implements ControllerResolverInterface,
 
     public function getController(Request $request)
     {
-        return array($this, 'callController');
+        return [$this, 'callController'];
     }
 
     public function getArguments(Request $request, $controller)
     {
-        return array($request);
+        return [$request];
     }
 
     public function callController(Request $request)
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestMultipleHttpKernel.php b/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestMultipleHttpKernel.php
index 712132bd13..010bee8689 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestMultipleHttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpCache/TestMultipleHttpKernel.php
@@ -21,9 +21,9 @@ use Symfony\Component\HttpKernel\HttpKernelInterface;
 
 class TestMultipleHttpKernel extends HttpKernel implements ControllerResolverInterface, ArgumentResolverInterface
 {
-    protected $bodies = array();
-    protected $statuses = array();
-    protected $headers = array();
+    protected $bodies = [];
+    protected $statuses = [];
+    protected $headers = [];
     protected $called = false;
     protected $backendRequest;
 
@@ -52,12 +52,12 @@ class TestMultipleHttpKernel extends HttpKernel implements ControllerResolverInt
 
     public function getController(Request $request)
     {
-        return array($this, 'callController');
+        return [$this, 'callController'];
     }
 
     public function getArguments(Request $request, $controller)
     {
-        return array($request);
+        return [$request];
     }
 
     public function callController(Request $request)
diff --git a/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php b/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
index 63a276a15e..4d1e267e3a 100644
--- a/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/HttpKernelTest.php
@@ -105,7 +105,7 @@ class HttpKernelTest extends TestCase
             $event->setResponse(new Response($event->getException()->getMessage()));
         });
 
-        $kernel = $this->getHttpKernel($dispatcher, function () { throw new MethodNotAllowedHttpException(array('POST')); });
+        $kernel = $this->getHttpKernel($dispatcher, function () { throw new MethodNotAllowedHttpException(['POST']); });
         $response = $kernel->handle(new Request());
 
         $this->assertEquals('405', $response->getStatusCode());
@@ -114,12 +114,12 @@ class HttpKernelTest extends TestCase
 
     public function getStatusCodes()
     {
-        return array(
-            array(200, 404),
-            array(404, 200),
-            array(301, 200),
-            array(500, 200),
-        );
+        return [
+            [200, 404],
+            [404, 200],
+            [301, 200],
+            [500, 200],
+        ];
     }
 
     /**
@@ -141,11 +141,11 @@ class HttpKernelTest extends TestCase
 
     public function getSpecificStatusCodes()
     {
-        return array(
-            array(200),
-            array(302),
-            array(403),
-        );
+        return [
+            [200],
+            [302],
+            [403],
+        ];
     }
 
     public function testHandleWhenAListenerReturnsAResponse()
@@ -199,7 +199,7 @@ class HttpKernelTest extends TestCase
     public function testHandleWhenTheControllerIsAnArray()
     {
         $dispatcher = new EventDispatcher();
-        $kernel = $this->getHttpKernel($dispatcher, array(new TestController(), 'controller'));
+        $kernel = $this->getHttpKernel($dispatcher, [new TestController(), 'controller']);
 
         $this->assertResponseEquals(new Response('foo'), $kernel->handle(new Request()));
     }
@@ -207,7 +207,7 @@ class HttpKernelTest extends TestCase
     public function testHandleWhenTheControllerIsAStaticArray()
     {
         $dispatcher = new EventDispatcher();
-        $kernel = $this->getHttpKernel($dispatcher, array('Symfony\Component\HttpKernel\Tests\TestController', 'staticcontroller'));
+        $kernel = $this->getHttpKernel($dispatcher, ['Symfony\Component\HttpKernel\Tests\TestController', 'staticcontroller']);
 
         $this->assertResponseEquals(new Response('foo'), $kernel->handle(new Request()));
     }
@@ -258,7 +258,7 @@ class HttpKernelTest extends TestCase
     {
         $dispatcher = new EventDispatcher();
         $dispatcher->addListener(KernelEvents::CONTROLLER_ARGUMENTS, function (FilterControllerArgumentsEvent $event) {
-            $event->setArguments(array('foo'));
+            $event->setArguments(['foo']);
         });
 
         $kernel = $this->getHttpKernel($dispatcher, function ($content) { return new Response($content); });
@@ -282,12 +282,12 @@ class HttpKernelTest extends TestCase
             };
 
             $event->setController($newController);
-            $event->setArguments(array('bar'));
+            $event->setArguments(['bar']);
         });
 
-        $kernel = $this->getHttpKernel($dispatcher, function ($content) { return new Response($content); }, null, array('foo'));
+        $kernel = $this->getHttpKernel($dispatcher, function ($content) { return new Response($content); }, null, ['foo']);
 
-        $this->assertResponseEquals(new Response('foo', 200, array('X-Id' => 'bar')), $kernel->handle(new Request()));
+        $this->assertResponseEquals(new Response('foo', 200, ['X-Id' => 'bar']), $kernel->handle(new Request()));
     }
 
     public function testTerminate()
@@ -312,7 +312,7 @@ class HttpKernelTest extends TestCase
     {
         $request = new Request();
 
-        $stack = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestStack')->setMethods(array('push', 'pop'))->getMock();
+        $stack = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestStack')->setMethods(['push', 'pop'])->getMock();
         $stack->expects($this->at(0))->method('push')->with($this->equalTo($request));
         $stack->expects($this->at(1))->method('pop');
 
@@ -328,7 +328,7 @@ class HttpKernelTest extends TestCase
     public function testInconsistentClientIpsOnMasterRequests()
     {
         $request = new Request();
-        $request->setTrustedProxies(array('1.1.1.1'), Request::HEADER_X_FORWARDED_FOR | Request::HEADER_FORWARDED);
+        $request->setTrustedProxies(['1.1.1.1'], Request::HEADER_X_FORWARDED_FOR | Request::HEADER_FORWARDED);
         $request->server->set('REMOTE_ADDR', '1.1.1.1');
         $request->headers->set('FORWARDED', 'for=2.2.2.2');
         $request->headers->set('X_FORWARDED_FOR', '3.3.3.3');
@@ -341,10 +341,10 @@ class HttpKernelTest extends TestCase
         $kernel = $this->getHttpKernel($dispatcher);
         $kernel->handle($request, $kernel::MASTER_REQUEST, false);
 
-        Request::setTrustedProxies(array(), -1);
+        Request::setTrustedProxies([], -1);
     }
 
-    private function getHttpKernel(EventDispatcherInterface $eventDispatcher, $controller = null, RequestStack $requestStack = null, array $arguments = array())
+    private function getHttpKernel(EventDispatcherInterface $eventDispatcher, $controller = null, RequestStack $requestStack = null, array $arguments = [])
     {
         if (null === $controller) {
             $controller = function () { return new Response('Hello'); };
diff --git a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
index 2b581398c5..57bd704c92 100644
--- a/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/KernelTest.php
@@ -91,7 +91,7 @@ class KernelTest extends TestCase
 
     public function testBootInitializesBundlesAndContainer()
     {
-        $kernel = $this->getKernel(array('initializeBundles', 'initializeContainer'));
+        $kernel = $this->getKernel(['initializeBundles', 'initializeContainer']);
         $kernel->expects($this->once())
             ->method('initializeBundles');
         $kernel->expects($this->once())
@@ -106,10 +106,10 @@ class KernelTest extends TestCase
         $bundle->expects($this->once())
             ->method('setContainer');
 
-        $kernel = $this->getKernel(array('initializeBundles', 'initializeContainer', 'getBundles'));
+        $kernel = $this->getKernel(['initializeBundles', 'initializeContainer', 'getBundles']);
         $kernel->expects($this->once())
             ->method('getBundles')
-            ->will($this->returnValue(array($bundle)));
+            ->will($this->returnValue([$bundle]));
 
         $kernel->boot();
     }
@@ -117,7 +117,7 @@ class KernelTest extends TestCase
     public function testBootSetsTheBootedFlagToTrue()
     {
         // use test kernel to access isBooted()
-        $kernel = $this->getKernelForTest(array('initializeBundles', 'initializeContainer'));
+        $kernel = $this->getKernelForTest(['initializeBundles', 'initializeContainer']);
         $kernel->boot();
 
         $this->assertTrue($kernel->isBooted());
@@ -125,7 +125,7 @@ class KernelTest extends TestCase
 
     public function testClassCacheIsNotLoadedByDefault()
     {
-        $kernel = $this->getKernel(array('initializeBundles', 'initializeContainer', 'doLoadClassCache'));
+        $kernel = $this->getKernel(['initializeBundles', 'initializeContainer', 'doLoadClassCache']);
         $kernel->expects($this->never())
             ->method('doLoadClassCache');
 
@@ -134,7 +134,7 @@ class KernelTest extends TestCase
 
     public function testBootKernelSeveralTimesOnlyInitializesBundlesOnce()
     {
-        $kernel = $this->getKernel(array('initializeBundles', 'initializeContainer'));
+        $kernel = $this->getKernel(['initializeBundles', 'initializeContainer']);
         $kernel->expects($this->once())
             ->method('initializeBundles');
 
@@ -148,7 +148,7 @@ class KernelTest extends TestCase
         $bundle->expects($this->once())
             ->method('shutdown');
 
-        $kernel = $this->getKernel(array(), array($bundle));
+        $kernel = $this->getKernel([], [$bundle]);
 
         $kernel->boot();
         $kernel->shutdown();
@@ -161,10 +161,10 @@ class KernelTest extends TestCase
             ->method('setContainer')
             ->with(null);
 
-        $kernel = $this->getKernel(array('getBundles'));
+        $kernel = $this->getKernel(['getBundles']);
         $kernel->expects($this->any())
             ->method('getBundles')
-            ->will($this->returnValue(array($bundle)));
+            ->will($this->returnValue([$bundle]));
 
         $kernel->boot();
         $kernel->shutdown();
@@ -184,7 +184,7 @@ class KernelTest extends TestCase
             ->method('handle')
             ->with($request, $type, $catch);
 
-        $kernel = $this->getKernel(array('getHttpKernel'));
+        $kernel = $this->getKernel(['getHttpKernel']);
         $kernel->expects($this->once())
             ->method('getHttpKernel')
             ->will($this->returnValue($httpKernelMock));
@@ -202,7 +202,7 @@ class KernelTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $kernel = $this->getKernel(array('getHttpKernel', 'boot'));
+        $kernel = $this->getKernel(['getHttpKernel', 'boot']);
         $kernel->expects($this->once())
             ->method('getHttpKernel')
             ->will($this->returnValue($httpKernelMock));
@@ -331,7 +331,7 @@ EOF;
         $debug = true;
         $kernel = new KernelForTest($env, $debug);
 
-        $expected = serialize(array($env, $debug));
+        $expected = serialize([$env, $debug]);
         $this->assertEquals($expected, $kernel->serialize());
     }
 
@@ -364,7 +364,7 @@ EOF;
      */
     public function testLocateResourceThrowsExceptionWhenResourceDoesNotExist()
     {
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->once())
             ->method('getBundle')
@@ -376,7 +376,7 @@ EOF;
 
     public function testLocateResourceReturnsTheFirstThatMatches()
     {
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->once())
             ->method('getBundle')
@@ -388,7 +388,7 @@ EOF;
 
     public function testLocateResourceIgnoresDirOnNonResource()
     {
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->once())
             ->method('getBundle')
@@ -403,7 +403,7 @@ EOF;
 
     public function testLocateResourceReturnsTheDirOneForResources()
     {
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->once())
             ->method('getBundle')
@@ -418,7 +418,7 @@ EOF;
 
     public function testLocateResourceOnDirectories()
     {
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->exactly(2))
             ->method('getBundle')
@@ -434,7 +434,7 @@ EOF;
             $kernel->locateResource('@FooBundle/Resources', __DIR__.'/Fixtures/Resources')
         );
 
-        $kernel = $this->getKernel(array('getBundle'));
+        $kernel = $this->getKernel(['getBundle']);
         $kernel
             ->expects($this->exactly(2))
             ->method('getBundle')
@@ -460,13 +460,13 @@ EOF;
         $fooBundle = $this->getBundle(null, null, 'FooBundle', 'DuplicateName');
         $barBundle = $this->getBundle(null, null, 'BarBundle', 'DuplicateName');
 
-        $kernel = $this->getKernel(array(), array($fooBundle, $barBundle));
+        $kernel = $this->getKernel([], [$fooBundle, $barBundle]);
         $kernel->boot();
     }
 
     public function testTerminateReturnsSilentlyIfKernelIsNotBooted()
     {
-        $kernel = $this->getKernel(array('getHttpKernel'));
+        $kernel = $this->getKernel(['getHttpKernel']);
         $kernel->expects($this->never())
             ->method('getHttpKernel');
 
@@ -478,7 +478,7 @@ EOF;
         // does not implement TerminableInterface
         $httpKernel = new TestKernel();
 
-        $kernel = $this->getKernel(array('getHttpKernel'));
+        $kernel = $this->getKernel(['getHttpKernel']);
         $kernel->expects($this->once())
             ->method('getHttpKernel')
             ->willReturn($httpKernel);
@@ -491,14 +491,14 @@ EOF;
         // implements TerminableInterface
         $httpKernelMock = $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernel')
             ->disableOriginalConstructor()
-            ->setMethods(array('terminate'))
+            ->setMethods(['terminate'])
             ->getMock();
 
         $httpKernelMock
             ->expects($this->once())
             ->method('terminate');
 
-        $kernel = $this->getKernel(array('getHttpKernel'));
+        $kernel = $this->getKernel(['getHttpKernel']);
         $kernel->expects($this->exactly(2))
             ->method('getHttpKernel')
             ->will($this->returnValue($httpKernelMock));
@@ -571,7 +571,7 @@ EOF;
             $container->addCompilerPass(new ResettableServicePass());
             $container->register('one', ResettableService::class)
                 ->setPublic(true)
-                ->addTag('kernel.reset', array('method' => 'reset'));
+                ->addTag('kernel.reset', ['method' => 'reset']);
             $container->register('services_resetter', ServicesResetter::class)->setPublic(true);
         }, $httpKernelMock, 'resetting');
 
@@ -595,7 +595,7 @@ EOF;
      */
     public function testKernelStartTimeIsResetWhileBootingAlreadyBootedKernel()
     {
-        $kernel = $this->getKernelForTest(array('initializeBundles'), true);
+        $kernel = $this->getKernelForTest(['initializeBundles'], true);
         $kernel->boot();
         $preReBoot = $kernel->getStartTime();
 
@@ -614,7 +614,7 @@ EOF;
     {
         $bundle = $this
             ->getMockBuilder('Symfony\Component\HttpKernel\Bundle\BundleInterface')
-            ->setMethods(array('getPath', 'getParent', 'getName'))
+            ->setMethods(['getPath', 'getParent', 'getName'])
             ->disableOriginalConstructor()
         ;
 
@@ -653,14 +653,14 @@ EOF;
      *
      * @return Kernel
      */
-    protected function getKernel(array $methods = array(), array $bundles = array())
+    protected function getKernel(array $methods = [], array $bundles = [])
     {
         $methods[] = 'registerBundles';
 
         $kernel = $this
             ->getMockBuilder('Symfony\Component\HttpKernel\Kernel')
             ->setMethods($methods)
-            ->setConstructorArgs(array('test', false))
+            ->setConstructorArgs(['test', false])
             ->getMockForAbstractClass()
         ;
         $kernel->expects($this->any())
@@ -674,10 +674,10 @@ EOF;
         return $kernel;
     }
 
-    protected function getKernelForTest(array $methods = array(), $debug = false)
+    protected function getKernelForTest(array $methods = [], $debug = false)
     {
         $kernel = $this->getMockBuilder('Symfony\Component\HttpKernel\Tests\Fixtures\KernelForTest')
-            ->setConstructorArgs(array('test', $debug))
+            ->setConstructorArgs(['test', $debug])
             ->setMethods($methods)
             ->getMock();
         $p = new \ReflectionProperty($kernel, 'rootDir');
@@ -718,7 +718,7 @@ class CustomProjectDirKernel extends Kernel
 
     public function registerBundles()
     {
-        return array();
+        return [];
     }
 
     public function registerContainerConfiguration(LoaderInterface $loader)
diff --git a/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php b/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
index a5d070c8a7..7354000b16 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Log/LoggerTest.php
@@ -72,39 +72,39 @@ class LoggerTest extends TestCase
      */
     public function testLogsAtAllLevels($level, $message)
     {
-        $this->logger->{$level}($message, array('user' => 'Bob'));
-        $this->logger->log($level, $message, array('user' => 'Bob'));
+        $this->logger->{$level}($message, ['user' => 'Bob']);
+        $this->logger->log($level, $message, ['user' => 'Bob']);
 
-        $expected = array(
+        $expected = [
             "[$level] message of level $level with context: Bob",
             "[$level] message of level $level with context: Bob",
-        );
+        ];
         $this->assertLogsMatch($expected, $this->getLogs());
     }
 
     public function provideLevelsAndMessages()
     {
-        return array(
-            LogLevel::EMERGENCY => array(LogLevel::EMERGENCY, 'message of level emergency with context: {user}'),
-            LogLevel::ALERT => array(LogLevel::ALERT, 'message of level alert with context: {user}'),
-            LogLevel::CRITICAL => array(LogLevel::CRITICAL, 'message of level critical with context: {user}'),
-            LogLevel::ERROR => array(LogLevel::ERROR, 'message of level error with context: {user}'),
-            LogLevel::WARNING => array(LogLevel::WARNING, 'message of level warning with context: {user}'),
-            LogLevel::NOTICE => array(LogLevel::NOTICE, 'message of level notice with context: {user}'),
-            LogLevel::INFO => array(LogLevel::INFO, 'message of level info with context: {user}'),
-            LogLevel::DEBUG => array(LogLevel::DEBUG, 'message of level debug with context: {user}'),
-        );
+        return [
+            LogLevel::EMERGENCY => [LogLevel::EMERGENCY, 'message of level emergency with context: {user}'],
+            LogLevel::ALERT => [LogLevel::ALERT, 'message of level alert with context: {user}'],
+            LogLevel::CRITICAL => [LogLevel::CRITICAL, 'message of level critical with context: {user}'],
+            LogLevel::ERROR => [LogLevel::ERROR, 'message of level error with context: {user}'],
+            LogLevel::WARNING => [LogLevel::WARNING, 'message of level warning with context: {user}'],
+            LogLevel::NOTICE => [LogLevel::NOTICE, 'message of level notice with context: {user}'],
+            LogLevel::INFO => [LogLevel::INFO, 'message of level info with context: {user}'],
+            LogLevel::DEBUG => [LogLevel::DEBUG, 'message of level debug with context: {user}'],
+        ];
     }
 
     public function testLogLevelDisabled()
     {
         $this->logger = new Logger(LogLevel::INFO, $this->tmpFile);
 
-        $this->logger->debug('test', array('user' => 'Bob'));
-        $this->logger->log(LogLevel::DEBUG, 'test', array('user' => 'Bob'));
+        $this->logger->debug('test', ['user' => 'Bob']);
+        $this->logger->log(LogLevel::DEBUG, 'test', ['user' => 'Bob']);
 
         // Will always be true, but asserts than an exception isn't thrown
-        $this->assertSame(array(), $this->getLogs());
+        $this->assertSame([], $this->getLogs());
     }
 
     /**
@@ -134,18 +134,18 @@ class LoggerTest extends TestCase
     public function testContextReplacement()
     {
         $logger = $this->logger;
-        $logger->info('{Message {nothing} {user} {foo.bar} a}', array('user' => 'Bob', 'foo.bar' => 'Bar'));
+        $logger->info('{Message {nothing} {user} {foo.bar} a}', ['user' => 'Bob', 'foo.bar' => 'Bar']);
 
-        $expected = array('[info] {Message {nothing} Bob Bar a}');
+        $expected = ['[info] {Message {nothing} Bob Bar a}'];
         $this->assertLogsMatch($expected, $this->getLogs());
     }
 
     public function testObjectCastToString()
     {
         if (method_exists($this, 'createPartialMock')) {
-            $dummy = $this->createPartialMock(DummyTest::class, array('__toString'));
+            $dummy = $this->createPartialMock(DummyTest::class, ['__toString']);
         } else {
-            $dummy = $this->getMock(DummyTest::class, array('__toString'));
+            $dummy = $this->getMock(DummyTest::class, ['__toString']);
         }
         $dummy->expects($this->atLeastOnce())
             ->method('__toString')
@@ -153,54 +153,54 @@ class LoggerTest extends TestCase
 
         $this->logger->warning($dummy);
 
-        $expected = array('[warning] DUMMY');
+        $expected = ['[warning] DUMMY'];
         $this->assertLogsMatch($expected, $this->getLogs());
     }
 
     public function testContextCanContainAnything()
     {
-        $context = array(
+        $context = [
             'bool' => true,
             'null' => null,
             'string' => 'Foo',
             'int' => 0,
             'float' => 0.5,
-            'nested' => array('with object' => new DummyTest()),
+            'nested' => ['with object' => new DummyTest()],
             'object' => new \DateTime(),
             'resource' => fopen('php://memory', 'r'),
-        );
+        ];
 
         $this->logger->warning('Crazy context data', $context);
 
-        $expected = array('[warning] Crazy context data');
+        $expected = ['[warning] Crazy context data'];
         $this->assertLogsMatch($expected, $this->getLogs());
     }
 
     public function testContextExceptionKeyCanBeExceptionOrOtherValues()
     {
         $logger = $this->logger;
-        $logger->warning('Random message', array('exception' => 'oops'));
-        $logger->critical('Uncaught Exception!', array('exception' => new \LogicException('Fail')));
+        $logger->warning('Random message', ['exception' => 'oops']);
+        $logger->critical('Uncaught Exception!', ['exception' => new \LogicException('Fail')]);
 
-        $expected = array(
+        $expected = [
             '[warning] Random message',
             '[critical] Uncaught Exception!',
-        );
+        ];
         $this->assertLogsMatch($expected, $this->getLogs());
     }
 
     public function testFormatter()
     {
         $this->logger = new Logger(LogLevel::DEBUG, $this->tmpFile, function ($level, $message, $context) {
-            return json_encode(array('level' => $level, 'message' => $message, 'context' => $context)).\PHP_EOL;
+            return json_encode(['level' => $level, 'message' => $message, 'context' => $context]).\PHP_EOL;
         });
 
-        $this->logger->error('An error', array('foo' => 'bar'));
-        $this->logger->warning('A warning', array('baz' => 'bar'));
-        $this->assertSame(array(
+        $this->logger->error('An error', ['foo' => 'bar']);
+        $this->logger->warning('A warning', ['baz' => 'bar']);
+        $this->assertSame([
             '{"level":"error","message":"An error","context":{"foo":"bar"}}',
             '{"level":"warning","message":"A warning","context":{"baz":"bar"}}',
-        ), $this->getLogs());
+        ], $this->getLogs());
     }
 }
 
diff --git a/src/Symfony/Component/HttpKernel/Tests/Logger.php b/src/Symfony/Component/HttpKernel/Tests/Logger.php
index 63c70bf67a..8ae756132c 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Logger.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Logger.php
@@ -29,59 +29,59 @@ class Logger implements LoggerInterface
 
     public function clear()
     {
-        $this->logs = array(
-            'emergency' => array(),
-            'alert' => array(),
-            'critical' => array(),
-            'error' => array(),
-            'warning' => array(),
-            'notice' => array(),
-            'info' => array(),
-            'debug' => array(),
-        );
+        $this->logs = [
+            'emergency' => [],
+            'alert' => [],
+            'critical' => [],
+            'error' => [],
+            'warning' => [],
+            'notice' => [],
+            'info' => [],
+            'debug' => [],
+        ];
     }
 
-    public function log($level, $message, array $context = array())
+    public function log($level, $message, array $context = [])
     {
         $this->logs[$level][] = $message;
     }
 
-    public function emergency($message, array $context = array())
+    public function emergency($message, array $context = [])
     {
         $this->log('emergency', $message, $context);
     }
 
-    public function alert($message, array $context = array())
+    public function alert($message, array $context = [])
     {
         $this->log('alert', $message, $context);
     }
 
-    public function critical($message, array $context = array())
+    public function critical($message, array $context = [])
     {
         $this->log('critical', $message, $context);
     }
 
-    public function error($message, array $context = array())
+    public function error($message, array $context = [])
     {
         $this->log('error', $message, $context);
     }
 
-    public function warning($message, array $context = array())
+    public function warning($message, array $context = [])
     {
         $this->log('warning', $message, $context);
     }
 
-    public function notice($message, array $context = array())
+    public function notice($message, array $context = [])
     {
         $this->log('notice', $message, $context);
     }
 
-    public function info($message, array $context = array())
+    public function info($message, array $context = [])
     {
         $this->log('info', $message, $context);
     }
 
-    public function debug($message, array $context = array())
+    public function debug($message, array $context = [])
     {
         $this->log('debug', $message, $context);
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/FileProfilerStorageTest.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/FileProfilerStorageTest.php
index e64c622c37..bf4cd17d16 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/FileProfilerStorageTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/FileProfilerStorageTest.php
@@ -226,7 +226,7 @@ class FileProfilerStorageTest extends TestCase
 
     public function testRetrieveByMethodAndLimit()
     {
-        foreach (array('POST', 'GET') as $method) {
+        foreach (['POST', 'GET'] as $method) {
             for ($i = 0; $i < 5; ++$i) {
                 $profile = new Profile('token_'.$i.$method);
                 $profile->setMethod($method);
@@ -293,8 +293,8 @@ class FileProfilerStorageTest extends TestCase
 
         $tokens = $this->storage->find('', '', 10, '');
         $this->assertCount(2, $tokens);
-        $this->assertContains($tokens[0]['status_code'], array(200, 404));
-        $this->assertContains($tokens[1]['status_code'], array(200, 404));
+        $this->assertContains($tokens[0]['status_code'], [200, 404]);
+        $this->assertContains($tokens[1]['status_code'], [200, 404]);
     }
 
     public function testMultiRowIndexFile()
diff --git a/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php b/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
index 2f7e8dd284..35aa8ea5dc 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Profiler/ProfilerTest.php
@@ -44,7 +44,7 @@ class ProfilerTest extends TestCase
     public function testReset()
     {
         $collector = $this->getMockBuilder(DataCollectorInterface::class)
-            ->setMethods(array('collect', 'getName', 'reset'))
+            ->setMethods(['collect', 'getName', 'reset'])
             ->getMock();
         $collector->expects($this->any())->method('getName')->willReturn('mock');
         $collector->expects($this->once())->method('reset');
diff --git a/src/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php b/src/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php
index fb95aa033b..27ba2d6f89 100644
--- a/src/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php
+++ b/src/Symfony/Component/HttpKernel/Tests/TestHttpKernel.php
@@ -27,12 +27,12 @@ class TestHttpKernel extends HttpKernel implements ControllerResolverInterface,
 
     public function getController(Request $request)
     {
-        return array($this, 'callController');
+        return [$this, 'callController'];
     }
 
     public function getArguments(Request $request, $controller)
     {
-        return array($request);
+        return [$request];
     }
 
     public function callController(Request $request)
diff --git a/src/Symfony/Component/HttpKernel/UriSigner.php b/src/Symfony/Component/HttpKernel/UriSigner.php
index 210f731735..1dd56ffd76 100644
--- a/src/Symfony/Component/HttpKernel/UriSigner.php
+++ b/src/Symfony/Component/HttpKernel/UriSigner.php
@@ -47,7 +47,7 @@ class UriSigner
         if (isset($url['query'])) {
             parse_str($url['query'], $params);
         } else {
-            $params = array();
+            $params = [];
         }
 
         $uri = $this->buildUrl($url, $params);
@@ -69,7 +69,7 @@ class UriSigner
         if (isset($url['query'])) {
             parse_str($url['query'], $params);
         } else {
-            $params = array();
+            $params = [];
         }
 
         if (empty($params[$this->parameter])) {
@@ -87,7 +87,7 @@ class UriSigner
         return base64_encode(hash_hmac('sha256', $uri, $this->secret, true));
     }
 
-    private function buildUrl(array $url, array $params = array())
+    private function buildUrl(array $url, array $params = [])
     {
         ksort($params, SORT_STRING);
         $url['query'] = http_build_query($params, '', '&');
diff --git a/src/Symfony/Component/Inflector/Inflector.php b/src/Symfony/Component/Inflector/Inflector.php
index b670b22dcd..4db0ddfe4c 100644
--- a/src/Symfony/Component/Inflector/Inflector.php
+++ b/src/Symfony/Component/Inflector/Inflector.php
@@ -27,7 +27,7 @@ final class Inflector
      *
      * @see http://english-zone.com/spelling/plurals.html
      */
-    private static $pluralMap = array(
+    private static $pluralMap = [
         // First entry: plural suffix, reversed
         // Second entry: length of plural suffix
         // Third entry: Whether the suffix may succeed a vocal
@@ -35,109 +35,109 @@ final class Inflector
         // Fifth entry: singular suffix, normal
 
         // bacteria (bacterium), criteria (criterion), phenomena (phenomenon)
-        array('a', 1, true, true, array('on', 'um')),
+        ['a', 1, true, true, ['on', 'um']],
 
         // nebulae (nebula)
-        array('ea', 2, true, true, 'a'),
+        ['ea', 2, true, true, 'a'],
 
         // services (service)
-        array('secivres', 8, true, true, 'service'),
+        ['secivres', 8, true, true, 'service'],
 
         // mice (mouse), lice (louse)
-        array('eci', 3, false, true, 'ouse'),
+        ['eci', 3, false, true, 'ouse'],
 
         // geese (goose)
-        array('esee', 4, false, true, 'oose'),
+        ['esee', 4, false, true, 'oose'],
 
         // fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius)
-        array('i', 1, true, true, 'us'),
+        ['i', 1, true, true, 'us'],
 
         // men (man), women (woman)
-        array('nem', 3, true, true, 'man'),
+        ['nem', 3, true, true, 'man'],
 
         // children (child)
-        array('nerdlihc', 8, true, true, 'child'),
+        ['nerdlihc', 8, true, true, 'child'],
 
         // oxen (ox)
-        array('nexo', 4, false, false, 'ox'),
+        ['nexo', 4, false, false, 'ox'],
 
         // indices (index), appendices (appendix), prices (price)
-        array('seci', 4, false, true, array('ex', 'ix', 'ice')),
+        ['seci', 4, false, true, ['ex', 'ix', 'ice']],
 
         // selfies (selfie)
-        array('seifles', 7, true, true, 'selfie'),
+        ['seifles', 7, true, true, 'selfie'],
 
         // movies (movie)
-        array('seivom', 6, true, true, 'movie'),
+        ['seivom', 6, true, true, 'movie'],
 
         // feet (foot)
-        array('teef', 4, true, true, 'foot'),
+        ['teef', 4, true, true, 'foot'],
 
         // geese (goose)
-        array('eseeg', 5, true, true, 'goose'),
+        ['eseeg', 5, true, true, 'goose'],
 
         // teeth (tooth)
-        array('hteet', 5, true, true, 'tooth'),
+        ['hteet', 5, true, true, 'tooth'],
 
         // news (news)
-        array('swen', 4, true, true, 'news'),
+        ['swen', 4, true, true, 'news'],
 
         // series (series)
-        array('seires', 6, true, true, 'series'),
+        ['seires', 6, true, true, 'series'],
 
         // babies (baby)
-        array('sei', 3, false, true, 'y'),
+        ['sei', 3, false, true, 'y'],
 
         // accesses (access), addresses (address), kisses (kiss)
-        array('sess', 4, true, false, 'ss'),
+        ['sess', 4, true, false, 'ss'],
 
         // analyses (analysis), ellipses (ellipsis), fungi (fungus),
         // neuroses (neurosis), theses (thesis), emphases (emphasis),
         // oases (oasis), crises (crisis), houses (house), bases (base),
         // atlases (atlas)
-        array('ses', 3, true, true, array('s', 'se', 'sis')),
+        ['ses', 3, true, true, ['s', 'se', 'sis']],
 
         // objectives (objective), alternative (alternatives)
-        array('sevit', 5, true, true, 'tive'),
+        ['sevit', 5, true, true, 'tive'],
 
         // drives (drive)
-        array('sevird', 6, false, true, 'drive'),
+        ['sevird', 6, false, true, 'drive'],
 
         // lives (life), wives (wife)
-        array('sevi', 4, false, true, 'ife'),
+        ['sevi', 4, false, true, 'ife'],
 
         // moves (move)
-        array('sevom', 5, true, true, 'move'),
+        ['sevom', 5, true, true, 'move'],
 
         // hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf), caves (cave), staves (staff)
-        array('sev', 3, true, true, array('f', 've', 'ff')),
+        ['sev', 3, true, true, ['f', 've', 'ff']],
 
         // axes (axis), axes (ax), axes (axe)
-        array('sexa', 4, false, false, array('ax', 'axe', 'axis')),
+        ['sexa', 4, false, false, ['ax', 'axe', 'axis']],
 
         // indexes (index), matrixes (matrix)
-        array('sex', 3, true, false, 'x'),
+        ['sex', 3, true, false, 'x'],
 
         // quizzes (quiz)
-        array('sezz', 4, true, false, 'z'),
+        ['sezz', 4, true, false, 'z'],
 
         // bureaus (bureau)
-        array('suae', 4, false, true, 'eau'),
+        ['suae', 4, false, true, 'eau'],
 
         // roses (rose), garages (garage), cassettes (cassette),
         // waltzes (waltz), heroes (hero), bushes (bush), arches (arch),
         // shoes (shoe)
-        array('se', 2, true, true, array('', 'e')),
+        ['se', 2, true, true, ['', 'e']],
 
         // tags (tag)
-        array('s', 1, true, true, ''),
+        ['s', 1, true, true, ''],
 
         // chateaux (chateau)
-        array('xuae', 4, false, true, 'eau'),
+        ['xuae', 4, false, true, 'eau'],
 
         // people (person)
-        array('elpoep', 6, true, true, 'person'),
-    );
+        ['elpoep', 6, true, true, 'person'],
+    ];
 
     /**
      * This class should not be instantiated.
@@ -207,7 +207,7 @@ final class Inflector
                     $firstUpper = ctype_upper($pluralRev[$j - 1]);
 
                     if (\is_array($newSuffix)) {
-                        $singulars = array();
+                        $singulars = [];
 
                         foreach ($newSuffix as $newSuffixEntry) {
                             $singulars[] = $newBase.($firstUpper ? ucfirst($newSuffixEntry) : $newSuffixEntry);
diff --git a/src/Symfony/Component/Inflector/Tests/InflectorTest.php b/src/Symfony/Component/Inflector/Tests/InflectorTest.php
index 8c40532a26..9f1e1c6baf 100644
--- a/src/Symfony/Component/Inflector/Tests/InflectorTest.php
+++ b/src/Symfony/Component/Inflector/Tests/InflectorTest.php
@@ -20,139 +20,139 @@ class InflectorTest extends TestCase
     {
         // see http://english-zone.com/spelling/plurals.html
         // see http://www.scribd.com/doc/3271143/List-of-100-Irregular-Plural-Nouns-in-English
-        return array(
-            array('accesses', 'access'),
-            array('addresses', 'address'),
-            array('agendas', 'agenda'),
-            array('alumnae', 'alumna'),
-            array('alumni', 'alumnus'),
-            array('analyses', array('analys', 'analyse', 'analysis')),
-            array('antennae', 'antenna'),
-            array('antennas', 'antenna'),
-            array('appendices', array('appendex', 'appendix', 'appendice')),
-            array('arches', array('arch', 'arche')),
-            array('atlases', array('atlas', 'atlase', 'atlasis')),
-            array('axes', array('ax', 'axe', 'axis')),
-            array('babies', 'baby'),
-            array('bacteria', array('bacterion', 'bacterium')),
-            array('bases', array('bas', 'base', 'basis')),
-            array('batches', array('batch', 'batche')),
-            array('beaux', 'beau'),
-            array('bees', array('be', 'bee')),
-            array('boxes', 'box'),
-            array('boys', 'boy'),
-            array('bureaus', 'bureau'),
-            array('bureaux', 'bureau'),
-            array('buses', array('bus', 'buse', 'busis')),
-            array('bushes', array('bush', 'bushe')),
-            array('calves', array('calf', 'calve', 'calff')),
-            array('cars', 'car'),
-            array('cassettes', array('cassett', 'cassette')),
-            array('caves', array('caf', 'cave', 'caff')),
-            array('chateaux', 'chateau'),
-            array('cheeses', array('chees', 'cheese', 'cheesis')),
-            array('children', 'child'),
-            array('circuses', array('circus', 'circuse', 'circusis')),
-            array('cliffs', 'cliff'),
-            array('committee', 'committee'),
-            array('crises', array('cris', 'crise', 'crisis')),
-            array('criteria', array('criterion', 'criterium')),
-            array('cups', 'cup'),
-            array('data', array('daton', 'datum')),
-            array('days', 'day'),
-            array('discos', 'disco'),
-            array('devices', array('devex', 'devix', 'device')),
-            array('drives', 'drive'),
-            array('drivers', 'driver'),
-            array('dwarves', array('dwarf', 'dwarve', 'dwarff')),
-            array('echoes', array('echo', 'echoe')),
-            array('elves', array('elf', 'elve', 'elff')),
-            array('emphases', array('emphas', 'emphase', 'emphasis')),
-            array('faxes', 'fax'),
-            array('feet', 'foot'),
-            array('feedback', 'feedback'),
-            array('foci', 'focus'),
-            array('focuses', array('focus', 'focuse', 'focusis')),
-            array('formulae', 'formula'),
-            array('formulas', 'formula'),
-            array('fungi', 'fungus'),
-            array('funguses', array('fungus', 'funguse', 'fungusis')),
-            array('garages', array('garag', 'garage')),
-            array('geese', 'goose'),
-            array('halves', array('half', 'halve', 'halff')),
-            array('hats', 'hat'),
-            array('heroes', array('hero', 'heroe')),
-            array('hippopotamuses', array('hippopotamus', 'hippopotamuse', 'hippopotamusis')), //hippopotami
-            array('hoaxes', 'hoax'),
-            array('hooves', array('hoof', 'hoove', 'hooff')),
-            array('houses', array('hous', 'house', 'housis')),
-            array('indexes', 'index'),
-            array('indices', array('index', 'indix', 'indice')),
-            array('ions', 'ion'),
-            array('irises', array('iris', 'irise', 'irisis')),
-            array('kisses', 'kiss'),
-            array('knives', 'knife'),
-            array('lamps', 'lamp'),
-            array('leaves', array('leaf', 'leave', 'leaff')),
-            array('lice', 'louse'),
-            array('lives', 'life'),
-            array('matrices', array('matrex', 'matrix', 'matrice')),
-            array('matrixes', 'matrix'),
-            array('men', 'man'),
-            array('mice', 'mouse'),
-            array('moves', 'move'),
-            array('movies', 'movie'),
-            array('nebulae', 'nebula'),
-            array('neuroses', array('neuros', 'neurose', 'neurosis')),
-            array('news', 'news'),
-            array('oases', array('oas', 'oase', 'oasis')),
-            array('objectives', 'objective'),
-            array('oxen', 'ox'),
-            array('parties', 'party'),
-            array('people', 'person'),
-            array('persons', 'person'),
-            array('phenomena', array('phenomenon', 'phenomenum')),
-            array('photos', 'photo'),
-            array('pianos', 'piano'),
-            array('plateaux', 'plateau'),
-            array('poppies', 'poppy'),
-            array('prices', array('prex', 'prix', 'price')),
-            array('quizzes', 'quiz'),
-            array('radii', 'radius'),
-            array('roofs', 'roof'),
-            array('roses', array('ros', 'rose', 'rosis')),
-            array('sandwiches', array('sandwich', 'sandwiche')),
-            array('scarves', array('scarf', 'scarve', 'scarff')),
-            array('schemas', 'schema'), //schemata
-            array('selfies', 'selfie'),
-            array('series', 'series'),
-            array('services', 'service'),
-            array('sheriffs', 'sheriff'),
-            array('shoes', array('sho', 'shoe')),
-            array('spies', 'spy'),
-            array('staves', array('staf', 'stave', 'staff')),
-            array('stories', 'story'),
-            array('strata', array('straton', 'stratum')),
-            array('suitcases', array('suitcas', 'suitcase', 'suitcasis')),
-            array('syllabi', 'syllabus'),
-            array('tags', 'tag'),
-            array('teeth', 'tooth'),
-            array('theses', array('thes', 'these', 'thesis')),
-            array('thieves', array('thief', 'thieve', 'thieff')),
-            array('trees', array('tre', 'tree')),
-            array('waltzes', array('waltz', 'waltze')),
-            array('wives', 'wife'),
+        return [
+            ['accesses', 'access'],
+            ['addresses', 'address'],
+            ['agendas', 'agenda'],
+            ['alumnae', 'alumna'],
+            ['alumni', 'alumnus'],
+            ['analyses', ['analys', 'analyse', 'analysis']],
+            ['antennae', 'antenna'],
+            ['antennas', 'antenna'],
+            ['appendices', ['appendex', 'appendix', 'appendice']],
+            ['arches', ['arch', 'arche']],
+            ['atlases', ['atlas', 'atlase', 'atlasis']],
+            ['axes', ['ax', 'axe', 'axis']],
+            ['babies', 'baby'],
+            ['bacteria', ['bacterion', 'bacterium']],
+            ['bases', ['bas', 'base', 'basis']],
+            ['batches', ['batch', 'batche']],
+            ['beaux', 'beau'],
+            ['bees', ['be', 'bee']],
+            ['boxes', 'box'],
+            ['boys', 'boy'],
+            ['bureaus', 'bureau'],
+            ['bureaux', 'bureau'],
+            ['buses', ['bus', 'buse', 'busis']],
+            ['bushes', ['bush', 'bushe']],
+            ['calves', ['calf', 'calve', 'calff']],
+            ['cars', 'car'],
+            ['cassettes', ['cassett', 'cassette']],
+            ['caves', ['caf', 'cave', 'caff']],
+            ['chateaux', 'chateau'],
+            ['cheeses', ['chees', 'cheese', 'cheesis']],
+            ['children', 'child'],
+            ['circuses', ['circus', 'circuse', 'circusis']],
+            ['cliffs', 'cliff'],
+            ['committee', 'committee'],
+            ['crises', ['cris', 'crise', 'crisis']],
+            ['criteria', ['criterion', 'criterium']],
+            ['cups', 'cup'],
+            ['data', ['daton', 'datum']],
+            ['days', 'day'],
+            ['discos', 'disco'],
+            ['devices', ['devex', 'devix', 'device']],
+            ['drives', 'drive'],
+            ['drivers', 'driver'],
+            ['dwarves', ['dwarf', 'dwarve', 'dwarff']],
+            ['echoes', ['echo', 'echoe']],
+            ['elves', ['elf', 'elve', 'elff']],
+            ['emphases', ['emphas', 'emphase', 'emphasis']],
+            ['faxes', 'fax'],
+            ['feet', 'foot'],
+            ['feedback', 'feedback'],
+            ['foci', 'focus'],
+            ['focuses', ['focus', 'focuse', 'focusis']],
+            ['formulae', 'formula'],
+            ['formulas', 'formula'],
+            ['fungi', 'fungus'],
+            ['funguses', ['fungus', 'funguse', 'fungusis']],
+            ['garages', ['garag', 'garage']],
+            ['geese', 'goose'],
+            ['halves', ['half', 'halve', 'halff']],
+            ['hats', 'hat'],
+            ['heroes', ['hero', 'heroe']],
+            ['hippopotamuses', ['hippopotamus', 'hippopotamuse', 'hippopotamusis']], //hippopotami
+            ['hoaxes', 'hoax'],
+            ['hooves', ['hoof', 'hoove', 'hooff']],
+            ['houses', ['hous', 'house', 'housis']],
+            ['indexes', 'index'],
+            ['indices', ['index', 'indix', 'indice']],
+            ['ions', 'ion'],
+            ['irises', ['iris', 'irise', 'irisis']],
+            ['kisses', 'kiss'],
+            ['knives', 'knife'],
+            ['lamps', 'lamp'],
+            ['leaves', ['leaf', 'leave', 'leaff']],
+            ['lice', 'louse'],
+            ['lives', 'life'],
+            ['matrices', ['matrex', 'matrix', 'matrice']],
+            ['matrixes', 'matrix'],
+            ['men', 'man'],
+            ['mice', 'mouse'],
+            ['moves', 'move'],
+            ['movies', 'movie'],
+            ['nebulae', 'nebula'],
+            ['neuroses', ['neuros', 'neurose', 'neurosis']],
+            ['news', 'news'],
+            ['oases', ['oas', 'oase', 'oasis']],
+            ['objectives', 'objective'],
+            ['oxen', 'ox'],
+            ['parties', 'party'],
+            ['people', 'person'],
+            ['persons', 'person'],
+            ['phenomena', ['phenomenon', 'phenomenum']],
+            ['photos', 'photo'],
+            ['pianos', 'piano'],
+            ['plateaux', 'plateau'],
+            ['poppies', 'poppy'],
+            ['prices', ['prex', 'prix', 'price']],
+            ['quizzes', 'quiz'],
+            ['radii', 'radius'],
+            ['roofs', 'roof'],
+            ['roses', ['ros', 'rose', 'rosis']],
+            ['sandwiches', ['sandwich', 'sandwiche']],
+            ['scarves', ['scarf', 'scarve', 'scarff']],
+            ['schemas', 'schema'], //schemata
+            ['selfies', 'selfie'],
+            ['series', 'series'],
+            ['services', 'service'],
+            ['sheriffs', 'sheriff'],
+            ['shoes', ['sho', 'shoe']],
+            ['spies', 'spy'],
+            ['staves', ['staf', 'stave', 'staff']],
+            ['stories', 'story'],
+            ['strata', ['straton', 'stratum']],
+            ['suitcases', ['suitcas', 'suitcase', 'suitcasis']],
+            ['syllabi', 'syllabus'],
+            ['tags', 'tag'],
+            ['teeth', 'tooth'],
+            ['theses', ['thes', 'these', 'thesis']],
+            ['thieves', ['thief', 'thieve', 'thieff']],
+            ['trees', ['tre', 'tree']],
+            ['waltzes', ['waltz', 'waltze']],
+            ['wives', 'wife'],
 
             // test casing: if the first letter was uppercase, it should remain so
-            array('Men', 'Man'),
-            array('GrandChildren', 'GrandChild'),
-            array('SubTrees', array('SubTre', 'SubTree')),
+            ['Men', 'Man'],
+            ['GrandChildren', 'GrandChild'],
+            ['SubTrees', ['SubTre', 'SubTree']],
 
             // Known issues
-            //array('insignia', 'insigne'),
-            //array('insignias', 'insigne'),
-            //array('rattles', 'rattle'),
-        );
+            //['insignia', 'insigne'],
+            //['insignias', 'insigne'],
+            //['rattles', 'rattle'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Intl/Collator/Collator.php b/src/Symfony/Component/Intl/Collator/Collator.php
index 69934de32d..a1fe084fa5 100644
--- a/src/Symfony/Component/Intl/Collator/Collator.php
+++ b/src/Symfony/Component/Intl/Collator/Collator.php
@@ -108,11 +108,11 @@ class Collator
      */
     public function asort(&$array, $sortFlag = self::SORT_REGULAR)
     {
-        $intlToPlainFlagMap = array(
+        $intlToPlainFlagMap = [
             self::SORT_REGULAR => \SORT_REGULAR,
             self::SORT_NUMERIC => \SORT_NUMERIC,
             self::SORT_STRING => \SORT_STRING,
-        );
+        ];
 
         $plainSortFlag = isset($intlToPlainFlagMap[$sortFlag]) ? $intlToPlainFlagMap[$sortFlag] : self::SORT_REGULAR;
 
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
index 035166c1fb..1efade5bd6 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReader.php
@@ -33,7 +33,7 @@ class BundleEntryReader implements BundleEntryReaderInterface
     /**
      * A mapping of locale aliases to locales.
      */
-    private $localeAliases = array();
+    private $localeAliases = [];
 
     /**
      * Creates an entry reader based on the given resource bundle reader.
@@ -76,7 +76,7 @@ class BundleEntryReader implements BundleEntryReaderInterface
         $readSucceeded = false;
         $exception = null;
         $currentLocale = $locale;
-        $testedLocales = array();
+        $testedLocales = [];
 
         while (null !== $currentLocale) {
             // Resolve any aliases to their target locales
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReaderInterface.php b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReaderInterface.php
index 13cf85bb48..8dac0aad24 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReaderInterface.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Reader/BundleEntryReaderInterface.php
@@ -35,7 +35,7 @@ interface BundleEntryReaderInterface extends BundleReaderInterface
      *
      * Then the value can be read by calling:
      *
-     *     $reader->readEntry('...', 'en', array('TopLevel', 'NestedLevel', 'Entry'));
+     *     $reader->readEntry('...', 'en', ['TopLevel', 'NestedLevel', 'Entry']);
      *
      * @param string   $path     The path to the resource bundle
      * @param string   $locale   The locale to read
diff --git a/src/Symfony/Component/Intl/Data/Bundle/Writer/PhpBundleWriter.php b/src/Symfony/Component/Intl/Data/Bundle/Writer/PhpBundleWriter.php
index 53d943dcfe..2cd959fb75 100644
--- a/src/Symfony/Component/Intl/Data/Bundle/Writer/PhpBundleWriter.php
+++ b/src/Symfony/Component/Intl/Data/Bundle/Writer/PhpBundleWriter.php
@@ -43,9 +43,11 @@ TEMPLATE;
         });
 
         $data = var_export($data, true);
-        $data = preg_replace('/array \(/', 'array(', $data);
-        $data = preg_replace('/\n {1,10}array\(/', 'array(', $data);
+        $data = preg_replace('/array \(/', '[', $data);
+        $data = preg_replace('/\n {1,10}\[/', '[', $data);
         $data = preg_replace('/  /', '    ', $data);
+        $data = preg_replace('/\),$/m', '],', $data);
+        $data = preg_replace('/\)$/', ']', $data);
         $data = sprintf($template, $data);
 
         file_put_contents($path.'/'.$locale.'.php', $data);
diff --git a/src/Symfony/Component/Intl/Data/Generator/CurrencyDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/CurrencyDataGenerator.php
index e657b38236..1be618d787 100644
--- a/src/Symfony/Component/Intl/Data/Generator/CurrencyDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/CurrencyDataGenerator.php
@@ -42,7 +42,7 @@ class CurrencyDataGenerator extends AbstractDataGenerator
     /**
      * Monetary units excluded from generation.
      */
-    private static $blacklist = array(
+    private static $blacklist = [
         self::UNKNOWN_CURRENCY_ID => true,
         self::EUROPEAN_COMPOSITE_UNIT_ID => true,
         self::EUROPEAN_MONETARY_UNIT_ID => true,
@@ -56,14 +56,14 @@ class CurrencyDataGenerator extends AbstractDataGenerator
         self::PALLADIUM_ID => true,
         self::SUCRE_ID => true,
         self::SPECIAL_DRAWING_RIGHTS_ID => true,
-    );
+    ];
 
     /**
      * Collects all available currency codes.
      *
      * @var string[]
      */
-    private $currencyCodes = array();
+    private $currencyCodes = [];
 
     /**
      * {@inheritdoc}
@@ -87,7 +87,7 @@ class CurrencyDataGenerator extends AbstractDataGenerator
      */
     protected function preGenerate()
     {
-        $this->currencyCodes = array();
+        $this->currencyCodes = [];
     }
 
     /**
@@ -98,10 +98,10 @@ class CurrencyDataGenerator extends AbstractDataGenerator
         $localeBundle = $reader->read($tempDir, $displayLocale);
 
         if (isset($localeBundle['Currencies']) && null !== $localeBundle['Currencies']) {
-            $data = array(
+            $data = [
                 'Version' => $localeBundle['Version'],
                 'Names' => $this->generateSymbolNamePairs($localeBundle),
-            );
+            ];
 
             $this->currencyCodes = array_merge($this->currencyCodes, array_keys($data['Names']));
 
@@ -116,10 +116,10 @@ class CurrencyDataGenerator extends AbstractDataGenerator
     {
         $rootBundle = $reader->read($tempDir, 'root');
 
-        return array(
+        return [
             'Version' => $rootBundle['Version'],
             'Names' => $this->generateSymbolNamePairs($rootBundle),
-        );
+        ];
     }
 
     /**
@@ -135,12 +135,12 @@ class CurrencyDataGenerator extends AbstractDataGenerator
 
         sort($this->currencyCodes);
 
-        $data = array(
+        $data = [
             'Version' => $rootBundle['Version'],
             'Currencies' => $this->currencyCodes,
             'Meta' => $this->generateCurrencyMeta($supplementalDataBundle),
             'Alpha3ToNumeric' => $this->generateAlpha3ToNumericMapping($numericCodesBundle, $this->currencyCodes),
-        );
+        ];
 
         $data['NumericToAlpha3'] = $this->generateNumericToAlpha3Mapping($data['Alpha3ToNumeric']);
 
@@ -181,14 +181,14 @@ class CurrencyDataGenerator extends AbstractDataGenerator
 
     private function generateNumericToAlpha3Mapping(array $alpha3ToNumericMapping)
     {
-        $numericToAlpha3Mapping = array();
+        $numericToAlpha3Mapping = [];
 
         foreach ($alpha3ToNumericMapping as $alpha3 => $numeric) {
             // Make sure that the mapping is stored as table and not as array
             $numeric = (string) $numeric;
 
             if (!isset($numericToAlpha3Mapping[$numeric])) {
-                $numericToAlpha3Mapping[$numeric] = array();
+                $numericToAlpha3Mapping[$numeric] = [];
             }
 
             $numericToAlpha3Mapping[$numeric][] = $alpha3;
diff --git a/src/Symfony/Component/Intl/Data/Generator/GeneratorConfig.php b/src/Symfony/Component/Intl/Data/Generator/GeneratorConfig.php
index 5b9e2b2ea9..b7b3095076 100644
--- a/src/Symfony/Component/Intl/Data/Generator/GeneratorConfig.php
+++ b/src/Symfony/Component/Intl/Data/Generator/GeneratorConfig.php
@@ -28,7 +28,7 @@ class GeneratorConfig
     /**
      * @var BundleWriterInterface[]
      */
-    private $bundleWriters = array();
+    private $bundleWriters = [];
 
     public function __construct(string $sourceDir, string $icuVersion)
     {
diff --git a/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
index eb26031ad0..258670f5ea 100644
--- a/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/LanguageDataGenerator.php
@@ -29,7 +29,7 @@ class LanguageDataGenerator extends AbstractDataGenerator
     /**
      * Source: http://www-01.sil.org/iso639-3/codes.asp.
      */
-    private static $preferredAlpha2ToAlpha3Mapping = array(
+    private static $preferredAlpha2ToAlpha3Mapping = [
         'ak' => 'aka',
         'ar' => 'ara',
         'ay' => 'aym',
@@ -81,20 +81,20 @@ class LanguageDataGenerator extends AbstractDataGenerator
         'yi' => 'yid',
         'za' => 'zha',
         'zh' => 'zho',
-    );
-    private static $blacklist = array(
+    ];
+    private static $blacklist = [
         'mul' => true, // Multiple languages
         'mis' => true, // Uncoded language
         'und' => true, // Unknown language
         'zxx' => true, // No linguistic content
-    );
+    ];
 
     /**
      * Collects all available language codes.
      *
      * @var string[]
      */
-    private $languageCodes = array();
+    private $languageCodes = [];
 
     /**
      * {@inheritdoc}
@@ -118,7 +118,7 @@ class LanguageDataGenerator extends AbstractDataGenerator
      */
     protected function preGenerate()
     {
-        $this->languageCodes = array();
+        $this->languageCodes = [];
     }
 
     /**
@@ -130,10 +130,10 @@ class LanguageDataGenerator extends AbstractDataGenerator
 
         // isset() on \ResourceBundle returns true even if the value is null
         if (isset($localeBundle['Languages']) && null !== $localeBundle['Languages']) {
-            $data = array(
+            $data = [
                 'Version' => $localeBundle['Version'],
                 'Names' => self::generateLanguageNames($localeBundle),
-            );
+            ];
 
             $this->languageCodes = array_merge($this->languageCodes, array_keys($data['Names']));
 
@@ -160,12 +160,12 @@ class LanguageDataGenerator extends AbstractDataGenerator
 
         sort($this->languageCodes);
 
-        return array(
+        return [
             'Version' => $rootBundle['Version'],
             'Languages' => $this->languageCodes,
             'Aliases' => array_column(iterator_to_array($metadataBundle['alias']['language']), 'replacement'),
             'Alpha2ToAlpha3' => $this->generateAlpha2ToAlpha3Mapping($metadataBundle),
-        );
+        ];
     }
 
     private static function generateLanguageNames(ArrayAccessibleResourceBundle $localeBundle): array
@@ -176,7 +176,7 @@ class LanguageDataGenerator extends AbstractDataGenerator
     private function generateAlpha2ToAlpha3Mapping(ArrayAccessibleResourceBundle $metadataBundle)
     {
         $aliases = iterator_to_array($metadataBundle['alias']['language']);
-        $alpha2ToAlpha3 = array();
+        $alpha2ToAlpha3 = [];
 
         foreach ($aliases as $alias => $language) {
             $language = $language['replacement'];
diff --git a/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
index 19a8b5b737..d1fc3c01e0 100644
--- a/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/LocaleDataGenerator.php
@@ -71,12 +71,12 @@ class LocaleDataGenerator
         // Generate a list of (existing) locale fallbacks
         $fallbackMapping = $this->generateFallbackMapping($displayLocales, $aliases);
 
-        $localeNames = array();
+        $localeNames = [];
 
         // Generate locale names for all locales that have translations in
         // at least the language or the region bundle
         foreach ($displayLocales as $displayLocale => $_) {
-            $localeNames[$displayLocale] = array();
+            $localeNames[$displayLocale] = [];
 
             foreach ($locales as $locale) {
                 try {
@@ -112,9 +112,9 @@ class LocaleDataGenerator
             }
 
             foreach ($writers as $targetDir => $writer) {
-                $writer->write($targetDir.'/'.$this->dirName, $displayLocale, array(
+                $writer->write($targetDir.'/'.$this->dirName, $displayLocale, [
                     'Names' => $localeNames[$displayLocale],
-                ));
+                ]);
             }
         }
 
@@ -122,18 +122,18 @@ class LocaleDataGenerator
         // target
         foreach ($aliases as $alias => $aliasOf) {
             foreach ($writers as $targetDir => $writer) {
-                $writer->write($targetDir.'/'.$this->dirName, $alias, array(
+                $writer->write($targetDir.'/'.$this->dirName, $alias, [
                     '%%ALIAS' => $aliasOf,
-                ));
+                ]);
             }
         }
 
         // Create root file which maps locale codes to locale codes, for fallback
         foreach ($writers as $targetDir => $writer) {
-            $writer->write($targetDir.'/'.$this->dirName, 'meta', array(
+            $writer->write($targetDir.'/'.$this->dirName, 'meta', [
                 'Locales' => $locales,
                 'Aliases' => $aliases,
-            ));
+            ]);
         }
 
         // Write parents locale file for the Translation component
@@ -175,7 +175,7 @@ class LocaleDataGenerator
         //    continue;
         //}
 
-        $extras = array();
+        $extras = [];
 
         // Discover the name of the script part of the locale
         // i.e. in zh_Hans_MO, "Hans" is the script
@@ -216,7 +216,7 @@ class LocaleDataGenerator
 
     private function generateFallbackMapping(array $displayLocales, array $aliases)
     {
-        $mapping = array();
+        $mapping = [];
 
         foreach ($displayLocales as $displayLocale => $_) {
             $mapping[$displayLocale] = null;
diff --git a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
index 920e2e311b..0728db8030 100644
--- a/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/RegionDataGenerator.php
@@ -40,7 +40,7 @@ class RegionDataGenerator extends AbstractDataGenerator
     /**
      * Regions excluded from generation.
      */
-    private static $blacklist = array(
+    private static $blacklist = [
         self::UNKNOWN_REGION_ID => true,
         // Look like countries, but are sub-continents
         self::OUTLYING_OCEANIA_REGION_ID => true,
@@ -53,14 +53,14 @@ class RegionDataGenerator extends AbstractDataGenerator
         self::BOUVET_ISLAND_ID => true,
         self::HEARD_MCDONALD_ISLANDS_ID => true,
         self::CLIPPERTON_ISLAND_ID => true,
-    );
+    ];
 
     /**
      * Collects all available language codes.
      *
      * @var string[]
      */
-    private $regionCodes = array();
+    private $regionCodes = [];
 
     /**
      * {@inheritdoc}
@@ -83,7 +83,7 @@ class RegionDataGenerator extends AbstractDataGenerator
      */
     protected function preGenerate()
     {
-        $this->regionCodes = array();
+        $this->regionCodes = [];
     }
 
     /**
@@ -95,10 +95,10 @@ class RegionDataGenerator extends AbstractDataGenerator
 
         // isset() on \ResourceBundle returns true even if the value is null
         if (isset($localeBundle['Countries']) && null !== $localeBundle['Countries']) {
-            $data = array(
+            $data = [
                 'Version' => $localeBundle['Version'],
                 'Names' => $this->generateRegionNames($localeBundle),
-            );
+            ];
 
             $this->regionCodes = array_merge($this->regionCodes, array_keys($data['Names']));
 
@@ -124,10 +124,10 @@ class RegionDataGenerator extends AbstractDataGenerator
 
         sort($this->regionCodes);
 
-        return array(
+        return [
             'Version' => $rootBundle['Version'],
             'Regions' => $this->regionCodes,
-        );
+        ];
     }
 
     /**
@@ -136,7 +136,7 @@ class RegionDataGenerator extends AbstractDataGenerator
     protected function generateRegionNames(ArrayAccessibleResourceBundle $localeBundle)
     {
         $unfilteredRegionNames = iterator_to_array($localeBundle['Countries']);
-        $regionNames = array();
+        $regionNames = [];
 
         foreach ($unfilteredRegionNames as $region => $regionName) {
             if (isset(self::$blacklist[$region])) {
diff --git a/src/Symfony/Component/Intl/Data/Generator/ScriptDataGenerator.php b/src/Symfony/Component/Intl/Data/Generator/ScriptDataGenerator.php
index 7ba6bbe692..7ed0625262 100644
--- a/src/Symfony/Component/Intl/Data/Generator/ScriptDataGenerator.php
+++ b/src/Symfony/Component/Intl/Data/Generator/ScriptDataGenerator.php
@@ -29,7 +29,7 @@ class ScriptDataGenerator extends AbstractDataGenerator
      *
      * @var string[]
      */
-    private $scriptCodes = array();
+    private $scriptCodes = [];
 
     /**
      * {@inheritdoc}
@@ -52,7 +52,7 @@ class ScriptDataGenerator extends AbstractDataGenerator
      */
     protected function preGenerate()
     {
-        $this->scriptCodes = array();
+        $this->scriptCodes = [];
     }
 
     /**
@@ -64,10 +64,10 @@ class ScriptDataGenerator extends AbstractDataGenerator
 
         // isset() on \ResourceBundle returns true even if the value is null
         if (isset($localeBundle['Scripts']) && null !== $localeBundle['Scripts']) {
-            $data = array(
+            $data = [
                 'Version' => $localeBundle['Version'],
                 'Names' => iterator_to_array($localeBundle['Scripts']),
-            );
+            ];
 
             $this->scriptCodes = array_merge($this->scriptCodes, array_keys($data['Names']));
 
@@ -93,9 +93,9 @@ class ScriptDataGenerator extends AbstractDataGenerator
 
         sort($this->scriptCodes);
 
-        return array(
+        return [
             'Version' => $rootBundle['Version'],
             'Scripts' => $this->scriptCodes,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/Data/Provider/CurrencyDataProvider.php b/src/Symfony/Component/Intl/Data/Provider/CurrencyDataProvider.php
index fa54e752c4..61814dfda3 100644
--- a/src/Symfony/Component/Intl/Data/Provider/CurrencyDataProvider.php
+++ b/src/Symfony/Component/Intl/Data/Provider/CurrencyDataProvider.php
@@ -47,7 +47,7 @@ class CurrencyDataProvider
 
     public function getCurrencies()
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Currencies'));
+        return $this->reader->readEntry($this->path, 'meta', ['Currencies']);
     }
 
     public function getSymbol($currency, $displayLocale = null)
@@ -56,7 +56,7 @@ class CurrencyDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $currency, static::INDEX_SYMBOL));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $currency, static::INDEX_SYMBOL]);
     }
 
     public function getName($currency, $displayLocale = null)
@@ -65,7 +65,7 @@ class CurrencyDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $currency, static::INDEX_NAME));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $currency, static::INDEX_NAME]);
     }
 
     public function getNames($displayLocale = null)
@@ -80,7 +80,7 @@ class CurrencyDataProvider
         // 3-letter codes (e.g. 32 => "ARA", "ARP", "ARS")
         // ====================================================================
 
-        $names = $this->reader->readEntry($this->path, $displayLocale, array('Names'));
+        $names = $this->reader->readEntry($this->path, $displayLocale, ['Names']);
 
         if ($names instanceof \Traversable) {
             $names = iterator_to_array($names);
@@ -106,9 +106,9 @@ class CurrencyDataProvider
     public function getFractionDigits($currency)
     {
         try {
-            return $this->reader->readEntry($this->path, 'meta', array('Meta', $currency, static::INDEX_FRACTION_DIGITS));
+            return $this->reader->readEntry($this->path, 'meta', ['Meta', $currency, static::INDEX_FRACTION_DIGITS]);
         } catch (MissingResourceException $e) {
-            return $this->reader->readEntry($this->path, 'meta', array('Meta', 'DEFAULT', static::INDEX_FRACTION_DIGITS));
+            return $this->reader->readEntry($this->path, 'meta', ['Meta', 'DEFAULT', static::INDEX_FRACTION_DIGITS]);
         }
     }
 
@@ -118,9 +118,9 @@ class CurrencyDataProvider
     public function getRoundingIncrement($currency)
     {
         try {
-            return $this->reader->readEntry($this->path, 'meta', array('Meta', $currency, static::INDEX_ROUNDING_INCREMENT));
+            return $this->reader->readEntry($this->path, 'meta', ['Meta', $currency, static::INDEX_ROUNDING_INCREMENT]);
         } catch (MissingResourceException $e) {
-            return $this->reader->readEntry($this->path, 'meta', array('Meta', 'DEFAULT', static::INDEX_ROUNDING_INCREMENT));
+            return $this->reader->readEntry($this->path, 'meta', ['Meta', 'DEFAULT', static::INDEX_ROUNDING_INCREMENT]);
         }
     }
 
@@ -129,7 +129,7 @@ class CurrencyDataProvider
      */
     public function getNumericCode($currency)
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Alpha3ToNumeric', $currency));
+        return $this->reader->readEntry($this->path, 'meta', ['Alpha3ToNumeric', $currency]);
     }
 
     /**
@@ -137,6 +137,6 @@ class CurrencyDataProvider
      */
     public function forNumericCode($numericCode)
     {
-        return $this->reader->readEntry($this->path, 'meta', array('NumericToAlpha3', (string) $numericCode));
+        return $this->reader->readEntry($this->path, 'meta', ['NumericToAlpha3', (string) $numericCode]);
     }
 }
diff --git a/src/Symfony/Component/Intl/Data/Provider/LanguageDataProvider.php b/src/Symfony/Component/Intl/Data/Provider/LanguageDataProvider.php
index d733dcd8c0..60a364b644 100644
--- a/src/Symfony/Component/Intl/Data/Provider/LanguageDataProvider.php
+++ b/src/Symfony/Component/Intl/Data/Provider/LanguageDataProvider.php
@@ -40,12 +40,12 @@ class LanguageDataProvider
 
     public function getLanguages()
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Languages'));
+        return $this->reader->readEntry($this->path, 'meta', ['Languages']);
     }
 
     public function getAliases()
     {
-        return $this->reader->readEntry($this->path, 'root', array('Aliases'));
+        return $this->reader->readEntry($this->path, 'root', ['Aliases']);
     }
 
     public function getName($language, $displayLocale = null)
@@ -54,7 +54,7 @@ class LanguageDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $language));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $language]);
     }
 
     public function getNames($displayLocale = null)
@@ -63,7 +63,7 @@ class LanguageDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        $languages = $this->reader->readEntry($this->path, $displayLocale, array('Names'));
+        $languages = $this->reader->readEntry($this->path, $displayLocale, ['Names']);
 
         if ($languages instanceof \Traversable) {
             $languages = iterator_to_array($languages);
@@ -77,6 +77,6 @@ class LanguageDataProvider
 
     public function getAlpha3Code($language)
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Alpha2ToAlpha3', $language));
+        return $this->reader->readEntry($this->path, 'meta', ['Alpha2ToAlpha3', $language]);
     }
 }
diff --git a/src/Symfony/Component/Intl/Data/Provider/LocaleDataProvider.php b/src/Symfony/Component/Intl/Data/Provider/LocaleDataProvider.php
index cdd73716ce..f42be225bc 100644
--- a/src/Symfony/Component/Intl/Data/Provider/LocaleDataProvider.php
+++ b/src/Symfony/Component/Intl/Data/Provider/LocaleDataProvider.php
@@ -40,12 +40,12 @@ class LocaleDataProvider
 
     public function getLocales()
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Locales'));
+        return $this->reader->readEntry($this->path, 'meta', ['Locales']);
     }
 
     public function getAliases()
     {
-        $aliases = $this->reader->readEntry($this->path, 'meta', array('Aliases'));
+        $aliases = $this->reader->readEntry($this->path, 'meta', ['Aliases']);
 
         if ($aliases instanceof \Traversable) {
             $aliases = iterator_to_array($aliases);
@@ -60,7 +60,7 @@ class LocaleDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $locale));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $locale]);
     }
 
     public function getNames($displayLocale = null)
@@ -69,7 +69,7 @@ class LocaleDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        $names = $this->reader->readEntry($this->path, $displayLocale, array('Names'));
+        $names = $this->reader->readEntry($this->path, $displayLocale, ['Names']);
 
         if ($names instanceof \Traversable) {
             $names = iterator_to_array($names);
diff --git a/src/Symfony/Component/Intl/Data/Provider/RegionDataProvider.php b/src/Symfony/Component/Intl/Data/Provider/RegionDataProvider.php
index 80880989a7..f45cae16a1 100644
--- a/src/Symfony/Component/Intl/Data/Provider/RegionDataProvider.php
+++ b/src/Symfony/Component/Intl/Data/Provider/RegionDataProvider.php
@@ -40,7 +40,7 @@ class RegionDataProvider
 
     public function getRegions()
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Regions'));
+        return $this->reader->readEntry($this->path, 'meta', ['Regions']);
     }
 
     public function getName($region, $displayLocale = null)
@@ -49,7 +49,7 @@ class RegionDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $region));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $region]);
     }
 
     public function getNames($displayLocale = null)
@@ -58,7 +58,7 @@ class RegionDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        $names = $this->reader->readEntry($this->path, $displayLocale, array('Names'));
+        $names = $this->reader->readEntry($this->path, $displayLocale, ['Names']);
 
         if ($names instanceof \Traversable) {
             $names = iterator_to_array($names);
diff --git a/src/Symfony/Component/Intl/Data/Provider/ScriptDataProvider.php b/src/Symfony/Component/Intl/Data/Provider/ScriptDataProvider.php
index a4c5ce3a17..43651cae59 100644
--- a/src/Symfony/Component/Intl/Data/Provider/ScriptDataProvider.php
+++ b/src/Symfony/Component/Intl/Data/Provider/ScriptDataProvider.php
@@ -40,7 +40,7 @@ class ScriptDataProvider
 
     public function getScripts()
     {
-        return $this->reader->readEntry($this->path, 'meta', array('Scripts'));
+        return $this->reader->readEntry($this->path, 'meta', ['Scripts']);
     }
 
     public function getName($script, $displayLocale = null)
@@ -49,7 +49,7 @@ class ScriptDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        return $this->reader->readEntry($this->path, $displayLocale, array('Names', $script));
+        return $this->reader->readEntry($this->path, $displayLocale, ['Names', $script]);
     }
 
     public function getNames($displayLocale = null)
@@ -58,7 +58,7 @@ class ScriptDataProvider
             $displayLocale = Locale::getDefault();
         }
 
-        $names = $this->reader->readEntry($this->path, $displayLocale, array('Names'));
+        $names = $this->reader->readEntry($this->path, $displayLocale, ['Names']);
 
         if ($names instanceof \Traversable) {
             $names = iterator_to_array($names);
diff --git a/src/Symfony/Component/Intl/Data/Util/LocaleScanner.php b/src/Symfony/Component/Intl/Data/Util/LocaleScanner.php
index 884a0d9e06..2d56ff9d0c 100644
--- a/src/Symfony/Component/Intl/Data/Util/LocaleScanner.php
+++ b/src/Symfony/Component/Intl/Data/Util/LocaleScanner.php
@@ -68,7 +68,7 @@ class LocaleScanner
     public function scanAliases($sourceDir)
     {
         $locales = $this->scanLocales($sourceDir);
-        $aliases = array();
+        $aliases = [];
 
         // Delete locales that are no aliases
         foreach ($locales as $locale) {
@@ -89,7 +89,7 @@ class LocaleScanner
     public function scanParents(string $sourceDir): array
     {
         $locales = $this->scanLocales($sourceDir);
-        $fallbacks = array();
+        $fallbacks = [];
 
         foreach ($locales as $locale) {
             $content = \file_get_contents($sourceDir.'/'.$locale.'.txt');
diff --git a/src/Symfony/Component/Intl/Data/Util/RingBuffer.php b/src/Symfony/Component/Intl/Data/Util/RingBuffer.php
index 7b999eeedd..9b4a860594 100644
--- a/src/Symfony/Component/Intl/Data/Util/RingBuffer.php
+++ b/src/Symfony/Component/Intl/Data/Util/RingBuffer.php
@@ -26,9 +26,9 @@ use Symfony\Component\Intl\Exception\OutOfBoundsException;
  */
 class RingBuffer implements \ArrayAccess
 {
-    private $values = array();
+    private $values = [];
 
-    private $indices = array();
+    private $indices = [];
 
     private $cursor = 0;
 
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/AmPmTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/AmPmTransformer.php
index 69d8a03a3a..36a1294c70 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/AmPmTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/AmPmTransformer.php
@@ -41,8 +41,8 @@ class AmPmTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'marker' => $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfWeekTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfWeekTransformer.php
index 0bbc5cb44f..f18abb9024 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfWeekTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfWeekTransformer.php
@@ -60,6 +60,6 @@ class DayOfWeekTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfYearTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfYearTransformer.php
index 23000311c7..c021ad5cbc 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfYearTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayOfYearTransformer.php
@@ -43,6 +43,6 @@ class DayOfYearTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayTransformer.php
index f05157f402..02453719a1 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/DayTransformer.php
@@ -41,8 +41,8 @@ class DayTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'day' => (int) $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
index a58d94e211..6ff96ec1ac 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
@@ -49,7 +49,7 @@ class FullTransformer
         $notImplementedCharsMatch = $this->buildCharsMatch($this->notImplementedChars);
         $this->regExp = "/($this->quoteMatch|$implementedCharsMatch|$notImplementedCharsMatch)/";
 
-        $this->transformers = array(
+        $this->transformers = [
             'M' => new MonthTransformer(),
             'L' => new MonthTransformer(),
             'y' => new YearTransformer(),
@@ -66,7 +66,7 @@ class FullTransformer
             'm' => new MinuteTransformer(),
             's' => new SecondTransformer(),
             'z' => new TimezoneTransformer(),
-        );
+        ];
     }
 
     /**
@@ -140,7 +140,7 @@ class FullTransformer
         $reverseMatchingRegExp = $this->getReverseMatchingRegExp($this->pattern);
         $reverseMatchingRegExp = '/^'.$reverseMatchingRegExp.'$/';
 
-        $options = array();
+        $options = [];
 
         if (preg_match($reverseMatchingRegExp, $value, $matches)) {
             $matches = $this->normalizeArray($matches);
@@ -255,17 +255,17 @@ class FullTransformer
      */
     protected function normalizeArray(array $data)
     {
-        $ret = array();
+        $ret = [];
 
         foreach ($data as $key => $value) {
             if (!\is_string($key)) {
                 continue;
             }
 
-            $ret[$key[0]] = array(
+            $ret[$key[0]] = [
                 'value' => $value,
                 'pattern' => $key,
-            );
+            ];
         }
 
         return $ret;
@@ -332,7 +332,7 @@ class FullTransformer
      */
     private function getDefaultValueForOptions(array $options)
     {
-        return array(
+        return [
             'year' => isset($options['year']) ? $options['year'] : 1970,
             'month' => isset($options['month']) ? $options['month'] : 1,
             'day' => isset($options['day']) ? $options['day'] : 1,
@@ -342,6 +342,6 @@ class FullTransformer
             'second' => isset($options['second']) ? $options['second'] : 0,
             'marker' => isset($options['marker']) ? $options['marker'] : null,
             'timezone' => isset($options['timezone']) ? $options['timezone'] : null,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1200Transformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1200Transformer.php
index dd3a1a8e71..68aab6323b 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1200Transformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1200Transformer.php
@@ -56,9 +56,9 @@ class Hour1200Transformer extends HourTransformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'hour' => (int) $matched,
             'hourInstance' => $this,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1201Transformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1201Transformer.php
index 63aea50498..f090ba4c27 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1201Transformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour1201Transformer.php
@@ -56,9 +56,9 @@ class Hour1201Transformer extends HourTransformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'hour' => (int) $matched,
             'hourInstance' => $this,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2400Transformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2400Transformer.php
index 78233f3d38..287c0bc1db 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2400Transformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2400Transformer.php
@@ -55,9 +55,9 @@ class Hour2400Transformer extends HourTransformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'hour' => (int) $matched,
             'hourInstance' => $this,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2401Transformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2401Transformer.php
index e82c04da95..325f9ccd9b 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2401Transformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/Hour2401Transformer.php
@@ -58,9 +58,9 @@ class Hour2401Transformer extends HourTransformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'hour' => (int) $matched,
             'hourInstance' => $this,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MinuteTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MinuteTransformer.php
index 1f4dec8d1a..32f60d0928 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MinuteTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MinuteTransformer.php
@@ -43,8 +43,8 @@ class MinuteTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'minute' => (int) $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
index b3c2862690..f66ffac481 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/MonthTransformer.php
@@ -20,7 +20,7 @@ namespace Symfony\Component\Intl\DateFormatter\DateFormat;
  */
 class MonthTransformer extends Transformer
 {
-    protected static $months = array(
+    protected static $months = [
         'January',
         'February',
         'March',
@@ -33,22 +33,22 @@ class MonthTransformer extends Transformer
         'October',
         'November',
         'December',
-    );
+    ];
 
     /**
      * Short months names (first 3 letters).
      */
-    protected static $shortMonths = array();
+    protected static $shortMonths = [];
 
     /**
      * Flipped $months array, $name => $index.
      */
-    protected static $flippedMonths = array();
+    protected static $flippedMonths = [];
 
     /**
      * Flipped $shortMonths array, $name => $index.
      */
-    protected static $flippedShortMonths = array();
+    protected static $flippedShortMonths = [];
 
     public function __construct()
     {
@@ -67,12 +67,12 @@ class MonthTransformer extends Transformer
      */
     public function format(\DateTime $dateTime, int $length): string
     {
-        $matchLengthMap = array(
+        $matchLengthMap = [
             1 => 'n',
             2 => 'm',
             3 => 'M',
             4 => 'F',
-        );
+        ];
 
         if (isset($matchLengthMap[$length])) {
             return $dateTime->format($matchLengthMap[$length]);
@@ -129,8 +129,8 @@ class MonthTransformer extends Transformer
             $matched = (int) $matched;
         }
 
-        return array(
+        return [
             'month' => $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/QuarterTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/QuarterTransformer.php
index ec02e7f305..6efea71f2f 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/QuarterTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/QuarterTransformer.php
@@ -34,7 +34,7 @@ class QuarterTransformer extends Transformer
             case 3:
                 return 'Q'.$quarter;
             default:
-                $map = array(1 => '1st quarter', 2 => '2nd quarter', 3 => '3rd quarter', 4 => '4th quarter');
+                $map = [1 => '1st quarter', 2 => '2nd quarter', 3 => '3rd quarter', 4 => '4th quarter'];
 
                 return $map[$quarter];
         }
@@ -61,6 +61,6 @@ class QuarterTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/SecondTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/SecondTransformer.php
index 6b1ffd0ce1..bce89af1c9 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/SecondTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/SecondTransformer.php
@@ -43,8 +43,8 @@ class SecondTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'second' => (int) $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimezoneTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimezoneTransformer.php
index 6120e3e482..a53d8f8d03 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimezoneTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/TimezoneTransformer.php
@@ -31,7 +31,7 @@ class TimezoneTransformer extends Transformer
     {
         $timeZone = substr($dateTime->getTimezone()->getName(), 0, 3);
 
-        if (!\in_array($timeZone, array('Etc', 'UTC', 'GMT'))) {
+        if (!\in_array($timeZone, ['Etc', 'UTC', 'GMT'])) {
             throw new NotImplementedException('Time zone different than GMT or UTC is not supported as a formatting output.');
         }
 
@@ -41,7 +41,7 @@ class TimezoneTransformer extends Transformer
         }
 
         // From ICU >= 59.1 GMT and UTC are no longer unified
-        if (\in_array($timeZone, array('UTC', 'UCT', 'Universal', 'Zulu'))) {
+        if (\in_array($timeZone, ['UTC', 'UCT', 'Universal', 'Zulu'])) {
             // offset is not supported with UTC
             return $length > 3 ? 'Coordinated Universal Time' : 'UTC';
         }
@@ -73,9 +73,9 @@ class TimezoneTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'timezone' => self::getEtcTimeZoneId($matched),
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/YearTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/YearTransformer.php
index b41420b722..51c2eca827 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/YearTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/YearTransformer.php
@@ -45,8 +45,8 @@ class YearTransformer extends Transformer
      */
     public function extractDateOptions(string $matched, int $length): array
     {
-        return array(
+        return [
             'year' => (int) $matched,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
index 69ab7c00c4..0db8230839 100644
--- a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
+++ b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
@@ -76,23 +76,23 @@ class IntlDateFormatter
     /**
      * Patterns used to format the date when no pattern is provided.
      */
-    private $defaultDateFormats = array(
+    private $defaultDateFormats = [
         self::NONE => '',
         self::FULL => 'EEEE, LLLL d, y',
         self::LONG => 'LLLL d, y',
         self::MEDIUM => 'LLL d, y',
         self::SHORT => 'M/d/yy',
-    );
+    ];
 
     /**
      * Patterns used to format the time when no pattern is provided.
      */
-    private $defaultTimeFormats = array(
+    private $defaultTimeFormats = [
         self::FULL => 'h:mm:ss a zzzz',
         self::LONG => 'h:mm:ss a z',
         self::MEDIUM => 'h:mm:ss a',
         self::SHORT => 'h:mm a',
-    );
+    ];
 
     private $datetype;
     private $timetype;
@@ -600,7 +600,7 @@ class IntlDateFormatter
      */
     protected function getDefaultPattern()
     {
-        $patternParts = array();
+        $patternParts = [];
         if (self::NONE !== $this->datetype) {
             $patternParts[] = $this->defaultDateFormats[$this->datetype];
         }
diff --git a/src/Symfony/Component/Intl/Globals/IntlGlobals.php b/src/Symfony/Component/Intl/Globals/IntlGlobals.php
index 86bba305be..246cf6afba 100644
--- a/src/Symfony/Component/Intl/Globals/IntlGlobals.php
+++ b/src/Symfony/Component/Intl/Globals/IntlGlobals.php
@@ -38,11 +38,11 @@ abstract class IntlGlobals
     /**
      * All known error codes.
      */
-    private static $errorCodes = array(
+    private static $errorCodes = [
         self::U_ZERO_ERROR => 'U_ZERO_ERROR',
         self::U_ILLEGAL_ARGUMENT_ERROR => 'U_ILLEGAL_ARGUMENT_ERROR',
         self::U_PARSE_ERROR => 'U_PARSE_ERROR',
-    );
+    ];
 
     /**
      * The error code of the last operation.
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index 574425eb45..d3979fabff 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -151,40 +151,40 @@ class NumberFormatter
     /**
      * Default values for the en locale.
      */
-    private $attributes = array(
+    private $attributes = [
         self::FRACTION_DIGITS => 0,
         self::GROUPING_USED => 1,
         self::ROUNDING_MODE => self::ROUND_HALFEVEN,
-    );
+    ];
 
     /**
      * Holds the initialized attributes code.
      */
-    private $initializedAttributes = array();
+    private $initializedAttributes = [];
 
     /**
      * The supported styles to the constructor $styles argument.
      */
-    private static $supportedStyles = array(
+    private static $supportedStyles = [
         'CURRENCY' => self::CURRENCY,
         'DECIMAL' => self::DECIMAL,
-    );
+    ];
 
     /**
      * Supported attributes to the setAttribute() $attr argument.
      */
-    private static $supportedAttributes = array(
+    private static $supportedAttributes = [
         'FRACTION_DIGITS' => self::FRACTION_DIGITS,
         'GROUPING_USED' => self::GROUPING_USED,
         'ROUNDING_MODE' => self::ROUNDING_MODE,
-    );
+    ];
 
     /**
      * The available rounding modes for setAttribute() usage with
      * NumberFormatter::ROUNDING_MODE. NumberFormatter::ROUND_DOWN
      * and NumberFormatter::ROUND_UP does not have a PHP only equivalent.
      */
-    private static $roundingModes = array(
+    private static $roundingModes = [
         'ROUND_HALFEVEN' => self::ROUND_HALFEVEN,
         'ROUND_HALFDOWN' => self::ROUND_HALFDOWN,
         'ROUND_HALFUP' => self::ROUND_HALFUP,
@@ -192,7 +192,7 @@ class NumberFormatter
         'ROUND_FLOOR' => self::ROUND_FLOOR,
         'ROUND_DOWN' => self::ROUND_DOWN,
         'ROUND_UP' => self::ROUND_UP,
-    );
+    ];
 
     /**
      * The mapping between NumberFormatter rounding modes to the available
@@ -200,23 +200,23 @@ class NumberFormatter
      *
      * @see http://www.php.net/manual/en/function.round.php
      */
-    private static $phpRoundingMap = array(
+    private static $phpRoundingMap = [
         self::ROUND_HALFDOWN => \PHP_ROUND_HALF_DOWN,
         self::ROUND_HALFEVEN => \PHP_ROUND_HALF_EVEN,
         self::ROUND_HALFUP => \PHP_ROUND_HALF_UP,
-    );
+    ];
 
     /**
      * The list of supported rounding modes which aren't available modes in
      * PHP's round() function, but there's an equivalent. Keys are rounding
      * modes, values does not matter.
      */
-    private static $customRoundingList = array(
+    private static $customRoundingList = [
         self::ROUND_CEILING => true,
         self::ROUND_FLOOR => true,
         self::ROUND_DOWN => true,
         self::ROUND_UP => true,
-    );
+    ];
 
     /**
      * The maximum value of the integer type in 32 bit platforms.
@@ -230,15 +230,15 @@ class NumberFormatter
      */
     private static $int64Max = 9223372036854775807;
 
-    private static $enSymbols = array(
-        self::DECIMAL => array('.', ',', ';', '%', '0', '#', '-', '+', '¤', '¤¤', '.', 'E', '‰', '*', '∞', 'NaN', '@', ','),
-        self::CURRENCY => array('.', ',', ';', '%', '0', '#', '-', '+', '¤', '¤¤', '.', 'E', '‰', '*', '∞', 'NaN', '@', ','),
-    );
+    private static $enSymbols = [
+        self::DECIMAL => ['.', ',', ';', '%', '0', '#', '-', '+', '¤', '¤¤', '.', 'E', '‰', '*', '∞', 'NaN', '@', ','],
+        self::CURRENCY => ['.', ',', ';', '%', '0', '#', '-', '+', '¤', '¤¤', '.', 'E', '‰', '*', '∞', 'NaN', '@', ','],
+    ];
 
-    private static $enTextAttributes = array(
-        self::DECIMAL => array('', '', '-', '', ' ', 'XXX', ''),
-        self::CURRENCY => array('¤', '', '-¤', '', ' ', 'XXX'),
-    );
+    private static $enTextAttributes = [
+        self::DECIMAL => ['', '', '-', '', ' ', 'XXX', ''],
+        self::CURRENCY => ['¤', '', '-¤', '', ' ', 'XXX'],
+    ];
 
     /**
      * @param string $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
diff --git a/src/Symfony/Component/Intl/ResourceBundle/CurrencyBundle.php b/src/Symfony/Component/Intl/ResourceBundle/CurrencyBundle.php
index 11ae995630..86e020570f 100644
--- a/src/Symfony/Component/Intl/ResourceBundle/CurrencyBundle.php
+++ b/src/Symfony/Component/Intl/ResourceBundle/CurrencyBundle.php
@@ -66,7 +66,7 @@ class CurrencyBundle extends CurrencyDataProvider implements CurrencyBundleInter
         try {
             return $this->getNames($displayLocale);
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 
@@ -102,7 +102,7 @@ class CurrencyBundle extends CurrencyDataProvider implements CurrencyBundleInter
         try {
             return $this->localeProvider->getLocales();
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 }
diff --git a/src/Symfony/Component/Intl/ResourceBundle/LanguageBundle.php b/src/Symfony/Component/Intl/ResourceBundle/LanguageBundle.php
index 1ef5862dac..b2fbde3fe5 100644
--- a/src/Symfony/Component/Intl/ResourceBundle/LanguageBundle.php
+++ b/src/Symfony/Component/Intl/ResourceBundle/LanguageBundle.php
@@ -66,7 +66,7 @@ class LanguageBundle extends LanguageDataProvider implements LanguageBundleInter
         try {
             return $this->getNames($displayLocale);
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 
@@ -90,7 +90,7 @@ class LanguageBundle extends LanguageDataProvider implements LanguageBundleInter
         try {
             return $this->scriptProvider->getNames($displayLocale);
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 
@@ -102,7 +102,7 @@ class LanguageBundle extends LanguageDataProvider implements LanguageBundleInter
         try {
             return $this->localeProvider->getLocales();
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 }
diff --git a/src/Symfony/Component/Intl/ResourceBundle/LocaleBundle.php b/src/Symfony/Component/Intl/ResourceBundle/LocaleBundle.php
index b14048a40f..078b1de2dd 100644
--- a/src/Symfony/Component/Intl/ResourceBundle/LocaleBundle.php
+++ b/src/Symfony/Component/Intl/ResourceBundle/LocaleBundle.php
@@ -31,7 +31,7 @@ class LocaleBundle extends LocaleDataProvider implements LocaleBundleInterface
         try {
             return parent::getLocales();
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 
@@ -55,7 +55,7 @@ class LocaleBundle extends LocaleDataProvider implements LocaleBundleInterface
         try {
             return $this->getNames($displayLocale);
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 }
diff --git a/src/Symfony/Component/Intl/ResourceBundle/RegionBundle.php b/src/Symfony/Component/Intl/ResourceBundle/RegionBundle.php
index 436d211cad..b5717a000f 100644
--- a/src/Symfony/Component/Intl/ResourceBundle/RegionBundle.php
+++ b/src/Symfony/Component/Intl/ResourceBundle/RegionBundle.php
@@ -54,7 +54,7 @@ class RegionBundle extends RegionDataProvider implements RegionBundleInterface
         try {
             return $this->getNames($displayLocale);
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 
@@ -66,7 +66,7 @@ class RegionBundle extends RegionDataProvider implements RegionBundleInterface
         try {
             return $this->localeProvider->getLocales();
         } catch (MissingResourceException $e) {
-            return array();
+            return [];
         }
     }
 }
diff --git a/src/Symfony/Component/Intl/Resources/bin/update-data.php b/src/Symfony/Component/Intl/Resources/bin/update-data.php
index 7238f46880..d6e25af474 100644
--- a/src/Symfony/Component/Intl/Resources/bin/update-data.php
+++ b/src/Symfony/Component/Intl/Resources/bin/update-data.php
@@ -178,8 +178,8 @@ $jsonDir = $baseDir;
 //$phpDir = $baseDir.'/'.Intl::PHP;
 //$resDir = $baseDir.'/'.Intl::RB_V2;
 
-$targetDirs = array($jsonDir/*, $resDir*/);
-$workingDirs = array($jsonDir/*, $txtDir, $resDir*/);
+$targetDirs = [$jsonDir/*, $resDir*/];
+$workingDirs = [$jsonDir/*, $txtDir, $resDir*/];
 
 //$config->addBundleWriter($txtDir, new TextBundleWriter());
 $config->addBundleWriter($jsonDir, new JsonBundleWriter());
@@ -189,13 +189,13 @@ echo "Starting resource bundle compilation. This may take a while...\n";
 $filesystem->remove($workingDirs);
 
 foreach ($workingDirs as $targetDir) {
-    $filesystem->mkdir(array(
+    $filesystem->mkdir([
         $targetDir.'/'.Intl::CURRENCY_DIR,
         $targetDir.'/'.Intl::LANGUAGE_DIR,
         $targetDir.'/'.Intl::LOCALE_DIR,
         $targetDir.'/'.Intl::REGION_DIR,
         $targetDir.'/'.Intl::SCRIPT_DIR,
-    ));
+    ]);
 }
 
 // We don't want to use fallback to English during generation
diff --git a/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php b/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
index 3465bb0c1d..28eb37d7cc 100644
--- a/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
+++ b/src/Symfony/Component/Intl/Tests/Collator/AbstractCollatorTest.php
@@ -33,24 +33,24 @@ abstract class AbstractCollatorTest extends TestCase
 
     public function asortProvider()
     {
-        return array(
+        return [
             /* array, sortFlag, expected */
-            array(
-                array('a', 'b', 'c'),
+            [
+                ['a', 'b', 'c'],
                 Collator::SORT_REGULAR,
-                array('a', 'b', 'c'),
-            ),
-            array(
-                array('c', 'b', 'a'),
+                ['a', 'b', 'c'],
+            ],
+            [
+                ['c', 'b', 'a'],
                 Collator::SORT_REGULAR,
-                array(2 => 'a', 1 => 'b',  0 => 'c'),
-            ),
-            array(
-                array('b', 'c', 'a'),
+                [2 => 'a', 1 => 'b',  0 => 'c'],
+            ],
+            [
+                ['b', 'c', 'a'],
                 Collator::SORT_REGULAR,
-                array(2 => 'a', 0 => 'b', 1 => 'c'),
-            ),
-        );
+                [2 => 'a', 0 => 'b', 1 => 'c'],
+            ],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
index 7578b8b787..766611ed02 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/BundleEntryReaderTest.php
@@ -32,34 +32,34 @@ class BundleEntryReaderTest extends TestCase
      */
     private $readerImpl;
 
-    private static $data = array(
-        'Entries' => array(
+    private static $data = [
+        'Entries' => [
             'Foo' => 'Bar',
             'Bar' => 'Baz',
-        ),
+        ],
         'Foo' => 'Bar',
         'Version' => '2.0',
-    );
+    ];
 
-    private static $fallbackData = array(
-        'Entries' => array(
+    private static $fallbackData = [
+        'Entries' => [
             'Foo' => 'Foo',
             'Bam' => 'Lah',
-        ),
+        ],
         'Baz' => 'Foo',
         'Version' => '1.0',
-    );
+    ];
 
-    private static $mergedData = array(
+    private static $mergedData = [
         // no recursive merging -> too complicated
-        'Entries' => array(
+        'Entries' => [
             'Foo' => 'Bar',
             'Bar' => 'Baz',
-        ),
+        ],
         'Baz' => 'Foo',
         'Version' => '2.0',
         'Foo' => 'Bar',
-    );
+    ];
 
     protected function setUp()
     {
@@ -89,7 +89,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'root')
             ->will($this->returnValue(self::$fallbackData));
 
-        $this->assertSame(self::$mergedData, $this->reader->readEntry(self::RES_DIR, 'en', array()));
+        $this->assertSame(self::$mergedData, $this->reader->readEntry(self::RES_DIR, 'en', []));
     }
 
     public function testReadExistingEntry()
@@ -99,7 +99,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'root')
             ->will($this->returnValue(self::$data));
 
-        $this->assertSame('Bar', $this->reader->readEntry(self::RES_DIR, 'root', array('Entries', 'Foo')));
+        $this->assertSame('Bar', $this->reader->readEntry(self::RES_DIR, 'root', ['Entries', 'Foo']));
     }
 
     /**
@@ -112,7 +112,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'root')
             ->will($this->returnValue(self::$data));
 
-        $this->reader->readEntry(self::RES_DIR, 'root', array('Entries', 'NonExisting'));
+        $this->reader->readEntry(self::RES_DIR, 'root', ['Entries', 'NonExisting']);
     }
 
     public function testFallbackIfEntryDoesNotExist()
@@ -127,7 +127,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'en')
             ->will($this->returnValue(self::$fallbackData));
 
-        $this->assertSame('Lah', $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Entries', 'Bam')));
+        $this->assertSame('Lah', $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Entries', 'Bam']));
     }
 
     /**
@@ -140,7 +140,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'en_GB')
             ->will($this->returnValue(self::$data));
 
-        $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Entries', 'Bam'), false);
+        $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Entries', 'Bam'], false);
     }
 
     public function testFallbackIfLocaleDoesNotExist()
@@ -155,7 +155,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'en')
             ->will($this->returnValue(self::$fallbackData));
 
-        $this->assertSame('Lah', $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Entries', 'Bam')));
+        $this->assertSame('Lah', $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Entries', 'Bam']));
     }
 
     /**
@@ -168,20 +168,20 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'en_GB')
             ->willThrowException(new ResourceBundleNotFoundException());
 
-        $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Entries', 'Bam'), false);
+        $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Entries', 'Bam'], false);
     }
 
     public function provideMergeableValues()
     {
-        return array(
-            array('foo', null, 'foo'),
-            array(null, 'foo', 'foo'),
-            array(array('foo', 'bar'), null, array('foo', 'bar')),
-            array(array('foo', 'bar'), array(), array('foo', 'bar')),
-            array(null, array('baz'), array('baz')),
-            array(array(), array('baz'), array('baz')),
-            array(array('foo', 'bar'), array('baz'), array('baz', 'foo', 'bar')),
-        );
+        return [
+            ['foo', null, 'foo'],
+            [null, 'foo', 'foo'],
+            [['foo', 'bar'], null, ['foo', 'bar']],
+            [['foo', 'bar'], [], ['foo', 'bar']],
+            [null, ['baz'], ['baz']],
+            [[], ['baz'], ['baz']],
+            [['foo', 'bar'], ['baz'], ['baz', 'foo', 'bar']],
+        ];
     }
 
     /**
@@ -206,7 +206,7 @@ class BundleEntryReaderTest extends TestCase
                 ->will($this->returnValue($childData));
         }
 
-        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en', array(), true));
+        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en', [], true));
     }
 
     /**
@@ -219,7 +219,7 @@ class BundleEntryReaderTest extends TestCase
             ->with(self::RES_DIR, 'en_GB')
             ->will($this->returnValue($childData));
 
-        $this->assertSame($childData, $this->reader->readEntry(self::RES_DIR, 'en_GB', array(), false));
+        $this->assertSame($childData, $this->reader->readEntry(self::RES_DIR, 'en_GB', [], false));
     }
 
     /**
@@ -231,20 +231,20 @@ class BundleEntryReaderTest extends TestCase
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
 
             $this->readerImpl->expects($this->at(1))
                 ->method('read')
                 ->with(self::RES_DIR, 'root')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $parentData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $parentData]]));
         } else {
             $this->readerImpl->expects($this->once())
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
         }
 
-        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en', array('Foo', 'Bar'), true));
+        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en', ['Foo', 'Bar'], true));
     }
 
     /**
@@ -255,14 +255,14 @@ class BundleEntryReaderTest extends TestCase
         $this->readerImpl->expects($this->at(0))
             ->method('read')
             ->with(self::RES_DIR, 'en_GB')
-            ->will($this->returnValue(array('Foo' => 'Baz')));
+            ->will($this->returnValue(['Foo' => 'Baz']));
 
         $this->readerImpl->expects($this->at(1))
             ->method('read')
             ->with(self::RES_DIR, 'en')
-            ->will($this->returnValue(array('Foo' => array('Bar' => $parentData))));
+            ->will($this->returnValue(['Foo' => ['Bar' => $parentData]]));
 
-        $this->assertSame($parentData, $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Foo', 'Bar'), true));
+        $this->assertSame($parentData, $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Foo', 'Bar'], true));
     }
 
     /**
@@ -274,20 +274,20 @@ class BundleEntryReaderTest extends TestCase
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en_GB')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
 
             $this->readerImpl->expects($this->at(1))
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
-                ->will($this->returnValue(array('Foo' => 'Bar')));
+                ->will($this->returnValue(['Foo' => 'Bar']));
         } else {
             $this->readerImpl->expects($this->once())
                 ->method('read')
                 ->with(self::RES_DIR, 'en_GB')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
         }
 
-        $this->assertSame($childData, $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Foo', 'Bar'), true));
+        $this->assertSame($childData, $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Foo', 'Bar'], true));
     }
 
     /**
@@ -298,14 +298,14 @@ class BundleEntryReaderTest extends TestCase
         $this->readerImpl->expects($this->at(0))
             ->method('read')
             ->with(self::RES_DIR, 'en_GB')
-            ->will($this->returnValue(array('Foo' => 'Baz')));
+            ->will($this->returnValue(['Foo' => 'Baz']));
 
         $this->readerImpl->expects($this->at(1))
             ->method('read')
             ->with(self::RES_DIR, 'en')
-            ->will($this->returnValue(array('Foo' => 'Bar')));
+            ->will($this->returnValue(['Foo' => 'Bar']));
 
-        $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Foo', 'Bar'), true);
+        $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Foo', 'Bar'], true);
     }
 
     /**
@@ -320,20 +320,20 @@ class BundleEntryReaderTest extends TestCase
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'en_GB')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
 
             $this->readerImpl->expects($this->at(1))
                 ->method('read')
                 ->with(self::RES_DIR, 'en')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $parentData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $parentData]]));
         } else {
             $this->readerImpl->expects($this->once())
                 ->method('read')
                 ->with(self::RES_DIR, 'en_GB')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
         }
 
-        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en_GB', array('Foo', 'Bar'), true));
+        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'en_GB', ['Foo', 'Bar'], true));
     }
 
     /**
@@ -341,26 +341,26 @@ class BundleEntryReaderTest extends TestCase
      */
     public function testFollowLocaleAliases($childData, $parentData, $result)
     {
-        $this->reader->setLocaleAliases(array('mo' => 'ro_MD'));
+        $this->reader->setLocaleAliases(['mo' => 'ro_MD']);
 
         if (null === $childData || \is_array($childData)) {
             $this->readerImpl->expects($this->at(0))
                 ->method('read')
                 ->with(self::RES_DIR, 'ro_MD')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
 
             // Read fallback locale of aliased locale ("ro_MD" -> "ro")
             $this->readerImpl->expects($this->at(1))
                 ->method('read')
                 ->with(self::RES_DIR, 'ro')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $parentData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $parentData]]));
         } else {
             $this->readerImpl->expects($this->once())
                 ->method('read')
                 ->with(self::RES_DIR, 'ro_MD')
-                ->will($this->returnValue(array('Foo' => array('Bar' => $childData))));
+                ->will($this->returnValue(['Foo' => ['Bar' => $childData]]));
         }
 
-        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'mo', array('Foo', 'Bar'), true));
+        $this->assertSame($result, $this->reader->readEntry(self::RES_DIR, 'mo', ['Foo', 'Bar'], true));
     }
 }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/en.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/en.php
index f2b06a91ad..e00056aee8 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/en.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/en.php
@@ -9,6 +9,6 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     'Foo' => 'Bar',
-);
+];
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/invalid_directory/en.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/invalid_directory/en.php
index f2b06a91ad..e00056aee8 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/invalid_directory/en.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/invalid_directory/en.php
@@ -9,6 +9,6 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     'Foo' => 'Bar',
-);
+];
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/php/en.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/php/en.php
index f2b06a91ad..e00056aee8 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/php/en.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Reader/Fixtures/php/en.php
@@ -9,6 +9,6 @@
  * file that was distributed with this source code.
  */
 
-return array(
+return [
     'Foo' => 'Bar',
-);
+];
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/en.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/en.php
index b694a07801..4038f5bcae 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/en.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/en.php
@@ -1,17 +1,17 @@
 <?php
 
-return array(
-    'Entry1' => array(
-        'Array' => array(
+return [
+    'Entry1' => [
+        'Array' => [
             0 => 'foo',
             1 => 'bar',
-        ),
+        ],
         'Integer' => 5,
         'Boolean' => false,
         'Float' => 1.23,
-    ),
+    ],
     'Entry2' => 'String',
-    'Traversable' => array(
+    'Traversable' => [
         'Foo' => 'Bar',
-    ),
-);
+    ],
+];
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/rb.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/rb.php
index 24e6465e20..03e0fc2d60 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/rb.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/Fixtures/rb.php
@@ -1,7 +1,7 @@
 <?php
 
-return array(
-    'Entry' => array(
+return [
+    'Entry' => [
         'NestedEntry' => 'Value',
-    ),
-);
+    ],
+];
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
index d13279c0d6..f56bc84385 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/JsonBundleWriterTest.php
@@ -48,18 +48,18 @@ class JsonBundleWriterTest extends TestCase
 
     public function testWrite()
     {
-        $this->writer->write($this->directory, 'en', array(
-            'Entry1' => array(
-                'Array' => array('foo', 'bar'),
+        $this->writer->write($this->directory, 'en', [
+            'Entry1' => [
+                'Array' => ['foo', 'bar'],
                 'Integer' => 5,
                 'Boolean' => false,
                 'Float' => 1.23,
-            ),
+            ],
             'Entry2' => 'String',
-            'Traversable' => new \ArrayIterator(array(
+            'Traversable' => new \ArrayIterator([
                 'Foo' => 'Bar',
-            )),
-        ));
+            ]),
+        ]);
 
         $this->assertFileEquals(__DIR__.'/Fixtures/en.json', $this->directory.'/en.json');
     }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
index e1b8f67413..8010f9574a 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/PhpBundleWriterTest.php
@@ -48,18 +48,18 @@ class PhpBundleWriterTest extends TestCase
 
     public function testWrite()
     {
-        $this->writer->write($this->directory, 'en', array(
-            'Entry1' => array(
-                'Array' => array('foo', 'bar'),
+        $this->writer->write($this->directory, 'en', [
+            'Entry1' => [
+                'Array' => ['foo', 'bar'],
                 'Integer' => 5,
                 'Boolean' => false,
                 'Float' => 1.23,
-            ),
+            ],
             'Entry2' => 'String',
-            'Traversable' => new \ArrayIterator(array(
+            'Traversable' => new \ArrayIterator([
                 'Foo' => 'Bar',
-            )),
-        ));
+            ]),
+        ]);
 
         $this->assertFileEquals(__DIR__.'/Fixtures/en.php', $this->directory.'/en.php');
     }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
index 4908f28370..2c0e70e019 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Bundle/Writer/TextBundleWriterTest.php
@@ -50,51 +50,51 @@ class TextBundleWriterTest extends TestCase
 
     public function testWrite()
     {
-        $this->writer->write($this->directory, 'en', array(
-            'Entry1' => array(
-                'Array' => array('foo', 'bar', array('Key' => 'value')),
+        $this->writer->write($this->directory, 'en', [
+            'Entry1' => [
+                'Array' => ['foo', 'bar', ['Key' => 'value']],
                 'Integer' => 5,
-                'IntVector' => array(0, 1, 2, 3),
-                'NotAnIntVector' => array(0 => 0, 2 => 1, 1 => 2, 3 => 3),
-                'IntVectorWithStringKeys' => array('a' => 0, 'b' => 1, 'c' => 2),
-                'TableWithIntKeys' => array(0 => 0, 1 => 1, 3 => 3),
+                'IntVector' => [0, 1, 2, 3],
+                'NotAnIntVector' => [0 => 0, 2 => 1, 1 => 2, 3 => 3],
+                'IntVectorWithStringKeys' => ['a' => 0, 'b' => 1, 'c' => 2],
+                'TableWithIntKeys' => [0 => 0, 1 => 1, 3 => 3],
                 'FalseBoolean' => false,
                 'TrueBoolean' => true,
                 'Null' => null,
                 'Float' => 1.23,
-            ),
+            ],
             'Entry2' => 'String',
-        ));
+        ]);
 
         $this->assertFileEquals(__DIR__.'/Fixtures/en.txt', $this->directory.'/en.txt');
     }
 
     public function testWriteTraversable()
     {
-        $this->writer->write($this->directory, 'en', new \ArrayIterator(array(
-            'Entry1' => new \ArrayIterator(array(
-                'Array' => array('foo', 'bar', array('Key' => 'value')),
+        $this->writer->write($this->directory, 'en', new \ArrayIterator([
+            'Entry1' => new \ArrayIterator([
+                'Array' => ['foo', 'bar', ['Key' => 'value']],
                 'Integer' => 5,
-                'IntVector' => array(0, 1, 2, 3),
-                'NotAnIntVector' => array(0 => 0, 2 => 1, 1 => 2, 3 => 3),
-                'IntVectorWithStringKeys' => array('a' => 0, 'b' => 1, 'c' => 2),
-                'TableWithIntKeys' => array(0 => 0, 1 => 1, 3 => 3),
+                'IntVector' => [0, 1, 2, 3],
+                'NotAnIntVector' => [0 => 0, 2 => 1, 1 => 2, 3 => 3],
+                'IntVectorWithStringKeys' => ['a' => 0, 'b' => 1, 'c' => 2],
+                'TableWithIntKeys' => [0 => 0, 1 => 1, 3 => 3],
                 'FalseBoolean' => false,
                 'TrueBoolean' => true,
                 'Null' => null,
                 'Float' => 1.23,
-            )),
+            ]),
             'Entry2' => 'String',
-        )));
+        ]));
 
         $this->assertFileEquals(__DIR__.'/Fixtures/en.txt', $this->directory.'/en.txt');
     }
 
     public function testWriteNoFallback()
     {
-        $data = array(
+        $data = [
             'Entry' => 'Value',
-        );
+        ];
 
         $this->writer->write($this->directory, 'en_nofallback', $data, $fallback = false);
 
@@ -103,13 +103,13 @@ class TextBundleWriterTest extends TestCase
 
     public function testEscapeKeysIfNecessary()
     {
-        $this->writer->write($this->directory, 'escaped', array(
+        $this->writer->write($this->directory, 'escaped', [
             // Keys with colons must be escaped, otherwise the part after the
             // colon is interpreted as resource type
             'EntryWith:Colon' => 'Value',
             // Keys with spaces must be escaped
             'Entry With Spaces' => 'Value',
-        ));
+        ]);
 
         $this->assertFileEquals(__DIR__.'/Fixtures/escaped.txt', $this->directory.'/escaped.txt');
     }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractCurrencyDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractCurrencyDataProviderTest.php
index bf23caee86..70afbb666d 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractCurrencyDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractCurrencyDataProviderTest.php
@@ -22,7 +22,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
 {
     // The below arrays document the state of the ICU data bundled with this package.
 
-    protected static $currencies = array(
+    protected static $currencies = [
         'ADP',
         'AED',
         'AFA',
@@ -313,9 +313,9 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
         'ZWD',
         'ZWL',
         'ZWR',
-    );
+    ];
 
-    protected static $alpha3ToNumeric = array(
+    protected static $alpha3ToNumeric = [
         'AFA' => 4,
         'ALK' => 8,
         'ALL' => 8,
@@ -584,7 +584,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
         'ESA' => 996,
         'USN' => 997,
         'USS' => 998,
-    );
+    ];
 
     /**
      * @var CurrencyDataProvider
@@ -659,7 +659,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
     public function testGetName($displayLocale)
     {
         $expected = $this->dataProvider->getNames($displayLocale);
-        $actual = array();
+        $actual = [];
 
         foreach ($expected as $currency => $name) {
             $actual[$currency] = $this->dataProvider->getName($currency, $displayLocale);
@@ -673,7 +673,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
         Locale::setDefault('de_AT');
 
         $expected = $this->dataProvider->getNames('de_AT');
-        $actual = array();
+        $actual = [];
 
         foreach ($expected as $currency => $name) {
             $actual[$currency] = $this->dataProvider->getName($currency);
@@ -697,7 +697,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
     public function provideCurrencies()
     {
         return array_map(
-            function ($currency) { return array($currency); },
+            function ($currency) { return [$currency]; },
             static::$currencies
         );
     }
@@ -721,7 +721,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
     public function provideCurrenciesWithNumericEquivalent()
     {
         return array_map(
-            function ($value) { return array($value); },
+            function ($value) { return [$value]; },
             array_keys(static::$alpha3ToNumeric)
         );
     }
@@ -737,7 +737,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
     public function provideCurrenciesWithoutNumericEquivalent()
     {
         return array_map(
-            function ($value) { return array($value); },
+            function ($value) { return [$value]; },
             array_diff(static::$currencies, array_keys(static::$alpha3ToNumeric))
         );
     }
@@ -756,7 +756,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
         $numericToAlpha3 = $this->getNumericToAlpha3Mapping();
 
         return array_map(
-            function ($numeric, $alpha3) { return array($numeric, $alpha3); },
+            function ($numeric, $alpha3) { return [$numeric, $alpha3]; },
             array_keys($numericToAlpha3),
             $numericToAlpha3
         );
@@ -782,7 +782,7 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
         $invalidNumericCodes = array_diff(range(0, 1000), $validNumericCodes);
 
         return array_map(
-            function ($value) { return array($value); },
+            function ($value) { return [$value]; },
             $invalidNumericCodes
         );
     }
@@ -798,11 +798,11 @@ abstract class AbstractCurrencyDataProviderTest extends AbstractDataProviderTest
 
     private function getNumericToAlpha3Mapping()
     {
-        $numericToAlpha3 = array();
+        $numericToAlpha3 = [];
 
         foreach (static::$alpha3ToNumeric as $alpha3 => $numeric) {
             if (!isset($numericToAlpha3[$numeric])) {
-                $numericToAlpha3[$numeric] = array();
+                $numericToAlpha3[$numeric] = [];
             }
 
             $numericToAlpha3[$numeric][] = $alpha3;
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
index 19246a0602..22025beceb 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractDataProviderTest.php
@@ -26,7 +26,7 @@ abstract class AbstractDataProviderTest extends TestCase
     // not loaded, because it is NOT possible to skip the execution of data
     // providers.
 
-    private static $locales = array(
+    private static $locales = [
         'af',
         'af_NA',
         'af_ZA',
@@ -633,9 +633,9 @@ abstract class AbstractDataProviderTest extends TestCase
         'zh_TW',
         'zu',
         'zu_ZA',
-    );
+    ];
 
-    private static $localeAliases = array(
+    private static $localeAliases = [
         'az_AZ' => 'az_Latn_AZ',
         'bs_BA' => 'bs_Latn_BA',
         'en_NH' => 'en_VU',
@@ -673,7 +673,7 @@ abstract class AbstractDataProviderTest extends TestCase
         'zh_MO' => 'zh_Hant_MO',
         'zh_SG' => 'zh_Hans_SG',
         'zh_TW' => 'zh_Hant_TW',
-    );
+    ];
 
     private static $rootLocales;
 
@@ -686,7 +686,7 @@ abstract class AbstractDataProviderTest extends TestCase
     public function provideLocales()
     {
         return array_map(
-            function ($locale) { return array($locale); },
+            function ($locale) { return [$locale]; },
             $this->getLocales()
         );
     }
@@ -694,7 +694,7 @@ abstract class AbstractDataProviderTest extends TestCase
     public function provideLocaleAliases()
     {
         return array_map(
-            function ($alias, $ofLocale) { return array($alias, $ofLocale); },
+            function ($alias, $ofLocale) { return [$alias, $ofLocale]; },
             array_keys($this->getLocaleAliases()),
             $this->getLocaleAliases()
         );
@@ -703,7 +703,7 @@ abstract class AbstractDataProviderTest extends TestCase
     public function provideRootLocales()
     {
         return array_map(
-            function ($locale) { return array($locale); },
+            function ($locale) { return [$locale]; },
             $this->getRootLocales()
         );
     }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractLanguageDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractLanguageDataProviderTest.php
index f328ebb484..003e688d03 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractLanguageDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractLanguageDataProviderTest.php
@@ -22,7 +22,7 @@ abstract class AbstractLanguageDataProviderTest extends AbstractDataProviderTest
 {
     // The below arrays document the state of the ICU data bundled with this package.
 
-    protected static $languages = array(
+    protected static $languages = [
         'aa',
         'ab',
         'ace',
@@ -643,9 +643,9 @@ abstract class AbstractLanguageDataProviderTest extends AbstractDataProviderTest
         'zun',
         'zxx',
         'zza',
-    );
+    ];
 
-    protected static $alpha2ToAlpha3 = array(
+    protected static $alpha2ToAlpha3 = [
         'aa' => 'aar',
         'ab' => 'abk',
         'af' => 'afr',
@@ -826,7 +826,7 @@ abstract class AbstractLanguageDataProviderTest extends AbstractDataProviderTest
         'yo' => 'yor',
         'za' => 'zha',
         'zu' => 'zul',
-    );
+    ];
 
     /**
      * @var LanguageDataProvider
@@ -913,7 +913,7 @@ abstract class AbstractLanguageDataProviderTest extends AbstractDataProviderTest
     public function provideLanguagesWithAlpha3Equivalent()
     {
         return array_map(
-            function ($value) { return array($value); },
+            function ($value) { return [$value]; },
             array_keys(static::$alpha2ToAlpha3)
         );
     }
@@ -929,7 +929,7 @@ abstract class AbstractLanguageDataProviderTest extends AbstractDataProviderTest
     public function provideLanguagesWithoutAlpha3Equivalent()
     {
         return array_map(
-            function ($value) { return array($value); },
+            function ($value) { return [$value]; },
             array_diff(static::$languages, array_keys(static::$alpha2ToAlpha3))
         );
     }
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractRegionDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractRegionDataProviderTest.php
index c91c96f1e4..1f5febb2b8 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractRegionDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractRegionDataProviderTest.php
@@ -22,7 +22,7 @@ abstract class AbstractRegionDataProviderTest extends AbstractDataProviderTest
 {
     // The below arrays document the state of the ICU data bundled with this package.
 
-    protected static $territories = array(
+    protected static $territories = [
         'AC',
         'AD',
         'AE',
@@ -278,7 +278,7 @@ abstract class AbstractRegionDataProviderTest extends AbstractDataProviderTest
         'ZA',
         'ZM',
         'ZW',
-    );
+    ];
 
     /**
      * @var RegionDataProvider
diff --git a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractScriptDataProviderTest.php b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractScriptDataProviderTest.php
index c827f62326..0626159cba 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractScriptDataProviderTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Provider/AbstractScriptDataProviderTest.php
@@ -23,7 +23,7 @@ abstract class AbstractScriptDataProviderTest extends AbstractDataProviderTest
 {
     // The below arrays document the state of the ICU data bundled with this package.
 
-    protected static $scripts = array(
+    protected static $scripts = [
         'Adlm',
         'Afak',
         'Aghb',
@@ -209,7 +209,7 @@ abstract class AbstractScriptDataProviderTest extends AbstractDataProviderTest
         'Zxxx',
         'Zyyy',
         'Zzzz',
-    );
+    ];
 
     /**
      * @var ScriptDataProvider
diff --git a/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php b/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
index abbe7f83f8..03a616a6ab 100644
--- a/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
+++ b/src/Symfony/Component/Intl/Tests/Data/Util/LocaleScannerTest.php
@@ -69,21 +69,21 @@ class LocaleScannerTest extends TestCase
 
     public function testScanLocales()
     {
-        $sortedLocales = array('de', 'de_alias', 'de_child', 'en', 'en_alias', 'en_child', 'fr', 'fr_alias', 'fr_child');
+        $sortedLocales = ['de', 'de_alias', 'de_child', 'en', 'en_alias', 'en_child', 'fr', 'fr_alias', 'fr_child'];
 
         $this->assertSame($sortedLocales, $this->scanner->scanLocales($this->directory));
     }
 
     public function testScanAliases()
     {
-        $sortedAliases = array('de_alias' => 'de', 'en_alias' => 'en', 'fr_alias' => 'fr');
+        $sortedAliases = ['de_alias' => 'de', 'en_alias' => 'en', 'fr_alias' => 'fr'];
 
         $this->assertSame($sortedAliases, $this->scanner->scanAliases($this->directory));
     }
 
     public function testScanParents()
     {
-        $sortedParents = array('de_child' => 'de', 'en_child' => 'en', 'fr_child' => 'fr');
+        $sortedParents = ['de_child' => 'de', 'en_child' => 'en', 'fr_child' => 'fr'];
 
         $this->assertSame($sortedParents, $this->scanner->scanParents($this->directory));
     }
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
index 925cb450c2..b2caafa27a 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/AbstractIntlDateFormatterTest.php
@@ -77,185 +77,185 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
     {
         $dateTime = new \DateTime('@0');
 
-        $formatData = array(
+        $formatData = [
             /* general */
-            array('y-M-d', 0, '1970-1-1'),
-            array("EEE, MMM d, ''yy", 0, "Thu, Jan 1, '70"),
-            array('h:mm a', 0, '12:00 AM'),
-            array('yyyyy.MMMM.dd hh:mm aaa', 0, '01970.January.01 12:00 AM'),
+            ['y-M-d', 0, '1970-1-1'],
+            ["EEE, MMM d, ''yy", 0, "Thu, Jan 1, '70"],
+            ['h:mm a', 0, '12:00 AM'],
+            ['yyyyy.MMMM.dd hh:mm aaa', 0, '01970.January.01 12:00 AM'],
 
             /* escaping */
-            array("'M'", 0, 'M'),
-            array("'yy'", 0, 'yy'),
-            array("'''yy'", 0, "'yy"),
-            array("''y", 0, "'1970"),
-            array("''yy", 0, "'70"),
-            array("H 'o'' clock'", 0, "0 o' clock"),
+            ["'M'", 0, 'M'],
+            ["'yy'", 0, 'yy'],
+            ["'''yy'", 0, "'yy"],
+            ["''y", 0, "'1970"],
+            ["''yy", 0, "'70"],
+            ["H 'o'' clock'", 0, "0 o' clock"],
 
             /* month */
-            array('M', 0, '1'),
-            array('MM', 0, '01'),
-            array('MMM', 0, 'Jan'),
-            array('MMMM', 0, 'January'),
-            array('MMMMM', 0, 'J'),
-            array('MMMMMM', 0, '000001'),
+            ['M', 0, '1'],
+            ['MM', 0, '01'],
+            ['MMM', 0, 'Jan'],
+            ['MMMM', 0, 'January'],
+            ['MMMMM', 0, 'J'],
+            ['MMMMMM', 0, '000001'],
 
-            array('L', 0, '1'),
-            array('LL', 0, '01'),
-            array('LLL', 0, 'Jan'),
-            array('LLLL', 0, 'January'),
-            array('LLLLL', 0, 'J'),
-            array('LLLLLL', 0, '000001'),
+            ['L', 0, '1'],
+            ['LL', 0, '01'],
+            ['LLL', 0, 'Jan'],
+            ['LLLL', 0, 'January'],
+            ['LLLLL', 0, 'J'],
+            ['LLLLLL', 0, '000001'],
 
             /* year */
-            array('y', 0, '1970'),
-            array('yy', 0, '70'),
-            array('yyy', 0, '1970'),
-            array('yyyy', 0, '1970'),
-            array('yyyyy', 0, '01970'),
-            array('yyyyyy', 0, '001970'),
+            ['y', 0, '1970'],
+            ['yy', 0, '70'],
+            ['yyy', 0, '1970'],
+            ['yyyy', 0, '1970'],
+            ['yyyyy', 0, '01970'],
+            ['yyyyyy', 0, '001970'],
 
             /* day */
-            array('d', 0, '1'),
-            array('dd', 0, '01'),
-            array('ddd', 0, '001'),
+            ['d', 0, '1'],
+            ['dd', 0, '01'],
+            ['ddd', 0, '001'],
 
             /* quarter */
-            array('Q', 0, '1'),
-            array('QQ', 0, '01'),
-            array('QQQ', 0, 'Q1'),
-            array('QQQQ', 0, '1st quarter'),
-            array('QQQQQ', 0, '1st quarter'),
+            ['Q', 0, '1'],
+            ['QQ', 0, '01'],
+            ['QQQ', 0, 'Q1'],
+            ['QQQQ', 0, '1st quarter'],
+            ['QQQQQ', 0, '1st quarter'],
 
-            array('q', 0, '1'),
-            array('qq', 0, '01'),
-            array('qqq', 0, 'Q1'),
-            array('qqqq', 0, '1st quarter'),
-            array('qqqqq', 0, '1st quarter'),
+            ['q', 0, '1'],
+            ['qq', 0, '01'],
+            ['qqq', 0, 'Q1'],
+            ['qqqq', 0, '1st quarter'],
+            ['qqqqq', 0, '1st quarter'],
 
             // 4 months
-            array('Q', 7776000, '2'),
-            array('QQ', 7776000, '02'),
-            array('QQQ', 7776000, 'Q2'),
-            array('QQQQ', 7776000, '2nd quarter'),
+            ['Q', 7776000, '2'],
+            ['QQ', 7776000, '02'],
+            ['QQQ', 7776000, 'Q2'],
+            ['QQQQ', 7776000, '2nd quarter'],
 
             // 7 months
-            array('QQQQ', 15638400, '3rd quarter'),
+            ['QQQQ', 15638400, '3rd quarter'],
 
             // 10 months
-            array('QQQQ', 23587200, '4th quarter'),
+            ['QQQQ', 23587200, '4th quarter'],
 
             /* 12-hour (1-12) */
-            array('h', 0, '12'),
-            array('hh', 0, '12'),
-            array('hhh', 0, '012'),
+            ['h', 0, '12'],
+            ['hh', 0, '12'],
+            ['hhh', 0, '012'],
 
-            array('h', 1, '12'),
-            array('h', 3600, '1'),
-            array('h', 43200, '12'), // 12 hours
+            ['h', 1, '12'],
+            ['h', 3600, '1'],
+            ['h', 43200, '12'], // 12 hours
 
             /* day of year */
-            array('D', 0, '1'),
-            array('D', 86400, '2'), // 1 day
-            array('D', 31536000, '1'), // 1 year
-            array('D', 31622400, '2'), // 1 year + 1 day
+            ['D', 0, '1'],
+            ['D', 86400, '2'], // 1 day
+            ['D', 31536000, '1'], // 1 year
+            ['D', 31622400, '2'], // 1 year + 1 day
 
             /* day of week */
-            array('E', 0, 'Thu'),
-            array('EE', 0, 'Thu'),
-            array('EEE', 0, 'Thu'),
-            array('EEEE', 0, 'Thursday'),
-            array('EEEEE', 0, 'T'),
-            array('EEEEEE', 0, 'Th'),
+            ['E', 0, 'Thu'],
+            ['EE', 0, 'Thu'],
+            ['EEE', 0, 'Thu'],
+            ['EEEE', 0, 'Thursday'],
+            ['EEEEE', 0, 'T'],
+            ['EEEEEE', 0, 'Th'],
 
-            array('E', 1296540000, 'Tue'), // 2011-02-01
-            array('E', 1296950400, 'Sun'), // 2011-02-06
+            ['E', 1296540000, 'Tue'], // 2011-02-01
+            ['E', 1296950400, 'Sun'], // 2011-02-06
 
             /* am/pm marker */
-            array('a', 0, 'AM'),
-            array('aa', 0, 'AM'),
-            array('aaa', 0, 'AM'),
-            array('aaaa', 0, 'AM'),
+            ['a', 0, 'AM'],
+            ['aa', 0, 'AM'],
+            ['aaa', 0, 'AM'],
+            ['aaaa', 0, 'AM'],
 
             // 12 hours
-            array('a', 43200, 'PM'),
-            array('aa', 43200, 'PM'),
-            array('aaa', 43200, 'PM'),
-            array('aaaa', 43200, 'PM'),
+            ['a', 43200, 'PM'],
+            ['aa', 43200, 'PM'],
+            ['aaa', 43200, 'PM'],
+            ['aaaa', 43200, 'PM'],
 
             /* 24-hour (0-23) */
-            array('H', 0, '0'),
-            array('HH', 0, '00'),
-            array('HHH', 0, '000'),
+            ['H', 0, '0'],
+            ['HH', 0, '00'],
+            ['HHH', 0, '000'],
 
-            array('H', 1, '0'),
-            array('H', 3600, '1'),
-            array('H', 43200, '12'),
-            array('H', 46800, '13'),
+            ['H', 1, '0'],
+            ['H', 3600, '1'],
+            ['H', 43200, '12'],
+            ['H', 46800, '13'],
 
             /* 24-hour (1-24) */
-            array('k', 0, '24'),
-            array('kk', 0, '24'),
-            array('kkk', 0, '024'),
+            ['k', 0, '24'],
+            ['kk', 0, '24'],
+            ['kkk', 0, '024'],
 
-            array('k', 1, '24'),
-            array('k', 3600, '1'),
-            array('k', 43200, '12'),
-            array('k', 46800, '13'),
+            ['k', 1, '24'],
+            ['k', 3600, '1'],
+            ['k', 43200, '12'],
+            ['k', 46800, '13'],
 
             /* 12-hour (0-11) */
-            array('K', 0, '0'),
-            array('KK', 0, '00'),
-            array('KKK', 0, '000'),
+            ['K', 0, '0'],
+            ['KK', 0, '00'],
+            ['KKK', 0, '000'],
 
-            array('K', 1, '0'),
-            array('K', 3600, '1'),
-            array('K', 43200, '0'), // 12 hours
+            ['K', 1, '0'],
+            ['K', 3600, '1'],
+            ['K', 43200, '0'], // 12 hours
 
             /* minute */
-            array('m', 0, '0'),
-            array('mm', 0, '00'),
-            array('mmm', 0, '000'),
+            ['m', 0, '0'],
+            ['mm', 0, '00'],
+            ['mmm', 0, '000'],
 
-            array('m', 1, '0'),
-            array('m', 60, '1'),
-            array('m', 120, '2'),
-            array('m', 180, '3'),
-            array('m', 3600, '0'),
-            array('m', 3660, '1'),
-            array('m', 43200, '0'), // 12 hours
+            ['m', 1, '0'],
+            ['m', 60, '1'],
+            ['m', 120, '2'],
+            ['m', 180, '3'],
+            ['m', 3600, '0'],
+            ['m', 3660, '1'],
+            ['m', 43200, '0'], // 12 hours
 
             /* second */
-            array('s', 0, '0'),
-            array('ss', 0, '00'),
-            array('sss', 0, '000'),
+            ['s', 0, '0'],
+            ['ss', 0, '00'],
+            ['sss', 0, '000'],
 
-            array('s', 1, '1'),
-            array('s', 2, '2'),
-            array('s', 5, '5'),
-            array('s', 30, '30'),
-            array('s', 59, '59'),
-            array('s', 60, '0'),
-            array('s', 120, '0'),
-            array('s', 180, '0'),
-            array('s', 3600, '0'),
-            array('s', 3601, '1'),
-            array('s', 3630, '30'),
-            array('s', 43200, '0'), // 12 hours
-        );
+            ['s', 1, '1'],
+            ['s', 2, '2'],
+            ['s', 5, '5'],
+            ['s', 30, '30'],
+            ['s', 59, '59'],
+            ['s', 60, '0'],
+            ['s', 120, '0'],
+            ['s', 180, '0'],
+            ['s', 3600, '0'],
+            ['s', 3601, '1'],
+            ['s', 3630, '30'],
+            ['s', 43200, '0'], // 12 hours
+        ];
 
         /* general, DateTime */
-        $formatData[] = array('y-M-d', $dateTime, '1970-1-1');
-        $formatData[] = array("EEE, MMM d, ''yy", $dateTime, "Thu, Jan 1, '70");
-        $formatData[] = array('h:mm a', $dateTime, '12:00 AM');
-        $formatData[] = array('yyyyy.MMMM.dd hh:mm aaa', $dateTime, '01970.January.01 12:00 AM');
+        $formatData[] = ['y-M-d', $dateTime, '1970-1-1'];
+        $formatData[] = ["EEE, MMM d, ''yy", $dateTime, "Thu, Jan 1, '70"];
+        $formatData[] = ['h:mm a', $dateTime, '12:00 AM'];
+        $formatData[] = ['yyyyy.MMMM.dd hh:mm aaa', $dateTime, '01970.January.01 12:00 AM'];
 
         if (IcuVersion::compare(Intl::getIcuVersion(), '59.1', '>=', 1)) {
             // Before ICU 59.1 GMT was used instead of UTC
-            $formatData[] = array("yyyy.MM.dd 'at' HH:mm:ss zzz", 0, '1970.01.01 at 00:00:00 UTC');
-            $formatData[] = array('K:mm a, z', 0, '0:00 AM, UTC');
-            $formatData[] = array("yyyy.MM.dd 'at' HH:mm:ss zzz", $dateTime, '1970.01.01 at 00:00:00 UTC');
-            $formatData[] = array('K:mm a, z', $dateTime, '0:00 AM, UTC');
+            $formatData[] = ["yyyy.MM.dd 'at' HH:mm:ss zzz", 0, '1970.01.01 at 00:00:00 UTC'];
+            $formatData[] = ['K:mm a, z', 0, '0:00 AM, UTC'];
+            $formatData[] = ["yyyy.MM.dd 'at' HH:mm:ss zzz", $dateTime, '1970.01.01 at 00:00:00 UTC'];
+            $formatData[] = ['K:mm a, z', $dateTime, '0:00 AM, UTC'];
         }
 
         return $formatData;
@@ -285,9 +285,9 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function formatErrorProvider()
     {
-        return array(
-            array('y-M-d', 'foobar', 'datefmt_format: string \'foobar\' is not numeric, which would be required for it to be a valid date: U_ILLEGAL_ARGUMENT_ERROR'),
-        );
+        return [
+            ['y-M-d', 'foobar', 'datefmt_format: string \'foobar\' is not numeric, which would be required for it to be a valid date: U_ILLEGAL_ARGUMENT_ERROR'],
+        ];
     }
 
     /**
@@ -302,31 +302,31 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function formatWithTimezoneProvider()
     {
-        $data = array(
-            array(0, 'UTC', '1970-01-01 00:00:00'),
-            array(0, 'GMT', '1970-01-01 00:00:00'),
-            array(0, 'GMT-03:00', '1969-12-31 21:00:00'),
-            array(0, 'GMT+03:00', '1970-01-01 03:00:00'),
-            array(0, 'Europe/Zurich', '1970-01-01 01:00:00'),
-            array(0, 'Europe/Paris', '1970-01-01 01:00:00'),
-            array(0, 'Africa/Cairo', '1970-01-01 02:00:00'),
-            array(0, 'Africa/Casablanca', '1970-01-01 00:00:00'),
-            array(0, 'Africa/Djibouti', '1970-01-01 03:00:00'),
-            array(0, 'Africa/Johannesburg', '1970-01-01 02:00:00'),
-            array(0, 'America/Antigua', '1969-12-31 20:00:00'),
-            array(0, 'America/Toronto', '1969-12-31 19:00:00'),
-            array(0, 'America/Vancouver', '1969-12-31 16:00:00'),
-            array(0, 'Asia/Aqtau', '1970-01-01 05:00:00'),
-            array(0, 'Asia/Bangkok', '1970-01-01 07:00:00'),
-            array(0, 'Asia/Dubai', '1970-01-01 04:00:00'),
-            array(0, 'Australia/Brisbane', '1970-01-01 10:00:00'),
-            array(0, 'Australia/Eucla', '1970-01-01 08:45:00'),
-            array(0, 'Australia/Melbourne', '1970-01-01 10:00:00'),
-            array(0, 'Europe/Berlin', '1970-01-01 01:00:00'),
-            array(0, 'Europe/Dublin', '1970-01-01 01:00:00'),
-            array(0, 'Europe/Warsaw', '1970-01-01 01:00:00'),
-            array(0, 'Pacific/Fiji', '1970-01-01 12:00:00'),
-        );
+        $data = [
+            [0, 'UTC', '1970-01-01 00:00:00'],
+            [0, 'GMT', '1970-01-01 00:00:00'],
+            [0, 'GMT-03:00', '1969-12-31 21:00:00'],
+            [0, 'GMT+03:00', '1970-01-01 03:00:00'],
+            [0, 'Europe/Zurich', '1970-01-01 01:00:00'],
+            [0, 'Europe/Paris', '1970-01-01 01:00:00'],
+            [0, 'Africa/Cairo', '1970-01-01 02:00:00'],
+            [0, 'Africa/Casablanca', '1970-01-01 00:00:00'],
+            [0, 'Africa/Djibouti', '1970-01-01 03:00:00'],
+            [0, 'Africa/Johannesburg', '1970-01-01 02:00:00'],
+            [0, 'America/Antigua', '1969-12-31 20:00:00'],
+            [0, 'America/Toronto', '1969-12-31 19:00:00'],
+            [0, 'America/Vancouver', '1969-12-31 16:00:00'],
+            [0, 'Asia/Aqtau', '1970-01-01 05:00:00'],
+            [0, 'Asia/Bangkok', '1970-01-01 07:00:00'],
+            [0, 'Asia/Dubai', '1970-01-01 04:00:00'],
+            [0, 'Australia/Brisbane', '1970-01-01 10:00:00'],
+            [0, 'Australia/Eucla', '1970-01-01 08:45:00'],
+            [0, 'Australia/Melbourne', '1970-01-01 10:00:00'],
+            [0, 'Europe/Berlin', '1970-01-01 01:00:00'],
+            [0, 'Europe/Dublin', '1970-01-01 01:00:00'],
+            [0, 'Europe/Warsaw', '1970-01-01 01:00:00'],
+            [0, 'Pacific/Fiji', '1970-01-01 12:00:00'],
+        ];
 
         return $data;
     }
@@ -344,52 +344,52 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function formatTimezoneProvider()
     {
-        return array(
-            array('z', 'GMT', 'GMT'),
-            array('zz', 'GMT', 'GMT'),
-            array('zzz', 'GMT', 'GMT'),
-            array('zzzz', 'GMT', 'Greenwich Mean Time'),
-            array('zzzzz', 'GMT', 'Greenwich Mean Time'),
+        return [
+            ['z', 'GMT', 'GMT'],
+            ['zz', 'GMT', 'GMT'],
+            ['zzz', 'GMT', 'GMT'],
+            ['zzzz', 'GMT', 'Greenwich Mean Time'],
+            ['zzzzz', 'GMT', 'Greenwich Mean Time'],
 
-            array('z', 'Etc/GMT', 'GMT'),
-            array('zz', 'Etc/GMT', 'GMT'),
-            array('zzz', 'Etc/GMT', 'GMT'),
-            array('zzzz', 'Etc/GMT', 'Greenwich Mean Time'),
-            array('zzzzz', 'Etc/GMT', 'Greenwich Mean Time'),
+            ['z', 'Etc/GMT', 'GMT'],
+            ['zz', 'Etc/GMT', 'GMT'],
+            ['zzz', 'Etc/GMT', 'GMT'],
+            ['zzzz', 'Etc/GMT', 'Greenwich Mean Time'],
+            ['zzzzz', 'Etc/GMT', 'Greenwich Mean Time'],
 
-            array('z', 'Etc/GMT+3', 'GMT-3'),
-            array('zz', 'Etc/GMT+3', 'GMT-3'),
-            array('zzz', 'Etc/GMT+3', 'GMT-3'),
-            array('zzzz', 'Etc/GMT+3', 'GMT-03:00'),
-            array('zzzzz', 'Etc/GMT+3', 'GMT-03:00'),
+            ['z', 'Etc/GMT+3', 'GMT-3'],
+            ['zz', 'Etc/GMT+3', 'GMT-3'],
+            ['zzz', 'Etc/GMT+3', 'GMT-3'],
+            ['zzzz', 'Etc/GMT+3', 'GMT-03:00'],
+            ['zzzzz', 'Etc/GMT+3', 'GMT-03:00'],
 
-            array('z', 'UTC', 'UTC'),
-            array('zz', 'UTC', 'UTC'),
-            array('zzz', 'UTC', 'UTC'),
-            array('zzzz', 'UTC', 'Coordinated Universal Time'),
-            array('zzzzz', 'UTC', 'Coordinated Universal Time'),
+            ['z', 'UTC', 'UTC'],
+            ['zz', 'UTC', 'UTC'],
+            ['zzz', 'UTC', 'UTC'],
+            ['zzzz', 'UTC', 'Coordinated Universal Time'],
+            ['zzzzz', 'UTC', 'Coordinated Universal Time'],
 
-            array('z', 'Etc/UTC', 'UTC'),
-            array('zz', 'Etc/UTC', 'UTC'),
-            array('zzz', 'Etc/UTC', 'UTC'),
-            array('zzzz', 'Etc/UTC', 'Coordinated Universal Time'),
-            array('zzzzz', 'Etc/UTC', 'Coordinated Universal Time'),
+            ['z', 'Etc/UTC', 'UTC'],
+            ['zz', 'Etc/UTC', 'UTC'],
+            ['zzz', 'Etc/UTC', 'UTC'],
+            ['zzzz', 'Etc/UTC', 'Coordinated Universal Time'],
+            ['zzzzz', 'Etc/UTC', 'Coordinated Universal Time'],
 
-            array('z', 'Etc/Universal', 'UTC'),
-            array('z', 'Etc/Zulu', 'UTC'),
-            array('z', 'Etc/UCT', 'UTC'),
-            array('z', 'Etc/Greenwich', 'GMT'),
-            array('zzzzz', 'Etc/Universal', 'Coordinated Universal Time'),
-            array('zzzzz', 'Etc/Zulu', 'Coordinated Universal Time'),
-            array('zzzzz', 'Etc/UCT', 'Coordinated Universal Time'),
-            array('zzzzz', 'Etc/Greenwich', 'Greenwich Mean Time'),
+            ['z', 'Etc/Universal', 'UTC'],
+            ['z', 'Etc/Zulu', 'UTC'],
+            ['z', 'Etc/UCT', 'UTC'],
+            ['z', 'Etc/Greenwich', 'GMT'],
+            ['zzzzz', 'Etc/Universal', 'Coordinated Universal Time'],
+            ['zzzzz', 'Etc/Zulu', 'Coordinated Universal Time'],
+            ['zzzzz', 'Etc/UCT', 'Coordinated Universal Time'],
+            ['zzzzz', 'Etc/Greenwich', 'Greenwich Mean Time'],
 
-            array('z', 'GMT+03:00', 'GMT+3'),
-            array('zz', 'GMT+03:00', 'GMT+3'),
-            array('zzz', 'GMT+03:00', 'GMT+3'),
-            array('zzzz', 'GMT+03:00', 'GMT+03:00'),
-            array('zzzzz', 'GMT+03:00', 'GMT+03:00'),
-        );
+            ['z', 'GMT+03:00', 'GMT+3'],
+            ['zz', 'GMT+03:00', 'GMT+3'],
+            ['zzz', 'GMT+03:00', 'GMT+3'],
+            ['zzzz', 'GMT+03:00', 'GMT+03:00'],
+            ['zzzzz', 'GMT+03:00', 'GMT+03:00'],
+        ];
     }
 
     public function testFormatWithGmtTimezone()
@@ -485,16 +485,16 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function dateAndTimeTypeProvider()
     {
-        return array(
-            array(0, IntlDateFormatter::FULL, IntlDateFormatter::NONE, 'Thursday, January 1, 1970'),
-            array(0, IntlDateFormatter::LONG, IntlDateFormatter::NONE, 'January 1, 1970'),
-            array(0, IntlDateFormatter::MEDIUM, IntlDateFormatter::NONE, 'Jan 1, 1970'),
-            array(0, IntlDateFormatter::SHORT, IntlDateFormatter::NONE, '1/1/70'),
-            array(0, IntlDateFormatter::NONE, IntlDateFormatter::FULL, '12:00:00 AM Coordinated Universal Time'),
-            array(0, IntlDateFormatter::NONE, IntlDateFormatter::LONG, '12:00:00 AM UTC'),
-            array(0, IntlDateFormatter::NONE, IntlDateFormatter::MEDIUM, '12:00:00 AM'),
-            array(0, IntlDateFormatter::NONE, IntlDateFormatter::SHORT, '12:00 AM'),
-        );
+        return [
+            [0, IntlDateFormatter::FULL, IntlDateFormatter::NONE, 'Thursday, January 1, 1970'],
+            [0, IntlDateFormatter::LONG, IntlDateFormatter::NONE, 'January 1, 1970'],
+            [0, IntlDateFormatter::MEDIUM, IntlDateFormatter::NONE, 'Jan 1, 1970'],
+            [0, IntlDateFormatter::SHORT, IntlDateFormatter::NONE, '1/1/70'],
+            [0, IntlDateFormatter::NONE, IntlDateFormatter::FULL, '12:00:00 AM Coordinated Universal Time'],
+            [0, IntlDateFormatter::NONE, IntlDateFormatter::LONG, '12:00:00 AM UTC'],
+            [0, IntlDateFormatter::NONE, IntlDateFormatter::MEDIUM, '12:00:00 AM'],
+            [0, IntlDateFormatter::NONE, IntlDateFormatter::SHORT, '12:00 AM'],
+        ];
     }
 
     public function testGetCalendar()
@@ -567,263 +567,263 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function parseYearProvider()
     {
-        return array(
-            array('y-M-d', '1970-1-1', 0),
-            array('yy-M-d', '70-1-1', 0),
-        );
+        return [
+            ['y-M-d', '1970-1-1', 0],
+            ['yy-M-d', '70-1-1', 0],
+        ];
     }
 
     public function parseQuarterProvider()
     {
-        return array(
-            array('Q', '1', 0),
-            array('QQ', '01', 0),
-            array('QQQ', 'Q1', 0),
-            array('QQQQ', '1st quarter', 0),
-            array('QQQQQ', '1st quarter', 0),
+        return [
+            ['Q', '1', 0],
+            ['QQ', '01', 0],
+            ['QQQ', 'Q1', 0],
+            ['QQQQ', '1st quarter', 0],
+            ['QQQQQ', '1st quarter', 0],
 
-            array('Q', '2', 7776000),
-            array('QQ', '02', 7776000),
-            array('QQQ', 'Q2', 7776000),
-            array('QQQQ', '2nd quarter', 7776000),
-            array('QQQQQ', '2nd quarter', 7776000),
+            ['Q', '2', 7776000],
+            ['QQ', '02', 7776000],
+            ['QQQ', 'Q2', 7776000],
+            ['QQQQ', '2nd quarter', 7776000],
+            ['QQQQQ', '2nd quarter', 7776000],
 
-            array('q', '1', 0),
-            array('qq', '01', 0),
-            array('qqq', 'Q1', 0),
-            array('qqqq', '1st quarter', 0),
-            array('qqqqq', '1st quarter', 0),
-        );
+            ['q', '1', 0],
+            ['qq', '01', 0],
+            ['qqq', 'Q1', 0],
+            ['qqqq', '1st quarter', 0],
+            ['qqqqq', '1st quarter', 0],
+        ];
     }
 
     public function parseMonthProvider()
     {
-        return array(
-            array('y-M-d', '1970-1-1', 0),
-            array('y-MMM-d', '1970-Jan-1', 0),
-            array('y-MMMM-d', '1970-January-1', 0),
-        );
+        return [
+            ['y-M-d', '1970-1-1', 0],
+            ['y-MMM-d', '1970-Jan-1', 0],
+            ['y-MMMM-d', '1970-January-1', 0],
+        ];
     }
 
     public function parseStandaloneMonthProvider()
     {
-        return array(
-            array('y-L-d', '1970-1-1', 0),
-            array('y-LLL-d', '1970-Jan-1', 0),
-            array('y-LLLL-d', '1970-January-1', 0),
-        );
+        return [
+            ['y-L-d', '1970-1-1', 0],
+            ['y-LLL-d', '1970-Jan-1', 0],
+            ['y-LLLL-d', '1970-January-1', 0],
+        ];
     }
 
     public function parseDayProvider()
     {
-        return array(
-            array('y-M-d', '1970-1-1', 0),
-            array('y-M-dd', '1970-1-01', 0),
-            array('y-M-ddd', '1970-1-001', 0),
-        );
+        return [
+            ['y-M-d', '1970-1-1', 0],
+            ['y-M-dd', '1970-1-01', 0],
+            ['y-M-ddd', '1970-1-001', 0],
+        ];
     }
 
     public function parseDayOfWeekProvider()
     {
-        return array(
-            array('E', 'Thu', 0),
-            array('EE', 'Thu', 0),
-            array('EEE', 'Thu', 0),
-            array('EEEE', 'Thursday', 0),
-            array('EEEEE', 'T', 432000),
-            array('EEEEEE', 'Th', 0),
-        );
+        return [
+            ['E', 'Thu', 0],
+            ['EE', 'Thu', 0],
+            ['EEE', 'Thu', 0],
+            ['EEEE', 'Thursday', 0],
+            ['EEEEE', 'T', 432000],
+            ['EEEEEE', 'Th', 0],
+        ];
     }
 
     public function parseDayOfYearProvider()
     {
-        return array(
-            array('D', '1', 0),
-            array('D', '2', 86400),
-        );
+        return [
+            ['D', '1', 0],
+            ['D', '2', 86400],
+        ];
     }
 
     public function parseHour12ClockOneBasedProvider()
     {
-        return array(
+        return [
             // 12 hours (1-12)
-            array('y-M-d h', '1970-1-1 1', 3600),
-            array('y-M-d h', '1970-1-1 10', 36000),
-            array('y-M-d hh', '1970-1-1 11', 39600),
-            array('y-M-d hh', '1970-1-1 12', 0),
-            array('y-M-d hh a', '1970-1-1 0 AM', 0),
-            array('y-M-d hh a', '1970-1-1 1 AM', 3600),
-            array('y-M-d hh a', '1970-1-1 10 AM', 36000),
-            array('y-M-d hh a', '1970-1-1 11 AM', 39600),
-            array('y-M-d hh a', '1970-1-1 12 AM', 0),
-            array('y-M-d hh a', '1970-1-1 23 AM', 82800),
-            array('y-M-d hh a', '1970-1-1 24 AM', 86400),
-            array('y-M-d hh a', '1970-1-1 0 PM', 43200),
-            array('y-M-d hh a', '1970-1-1 1 PM', 46800),
-            array('y-M-d hh a', '1970-1-1 10 PM', 79200),
-            array('y-M-d hh a', '1970-1-1 11 PM', 82800),
-            array('y-M-d hh a', '1970-1-1 12 PM', 43200),
-            array('y-M-d hh a', '1970-1-1 23 PM', 126000),
-            array('y-M-d hh a', '1970-1-1 24 PM', 129600),
-        );
+            ['y-M-d h', '1970-1-1 1', 3600],
+            ['y-M-d h', '1970-1-1 10', 36000],
+            ['y-M-d hh', '1970-1-1 11', 39600],
+            ['y-M-d hh', '1970-1-1 12', 0],
+            ['y-M-d hh a', '1970-1-1 0 AM', 0],
+            ['y-M-d hh a', '1970-1-1 1 AM', 3600],
+            ['y-M-d hh a', '1970-1-1 10 AM', 36000],
+            ['y-M-d hh a', '1970-1-1 11 AM', 39600],
+            ['y-M-d hh a', '1970-1-1 12 AM', 0],
+            ['y-M-d hh a', '1970-1-1 23 AM', 82800],
+            ['y-M-d hh a', '1970-1-1 24 AM', 86400],
+            ['y-M-d hh a', '1970-1-1 0 PM', 43200],
+            ['y-M-d hh a', '1970-1-1 1 PM', 46800],
+            ['y-M-d hh a', '1970-1-1 10 PM', 79200],
+            ['y-M-d hh a', '1970-1-1 11 PM', 82800],
+            ['y-M-d hh a', '1970-1-1 12 PM', 43200],
+            ['y-M-d hh a', '1970-1-1 23 PM', 126000],
+            ['y-M-d hh a', '1970-1-1 24 PM', 129600],
+        ];
     }
 
     public function parseHour12ClockZeroBasedProvider()
     {
-        return array(
+        return [
             // 12 hours (0-11)
-            array('y-M-d K', '1970-1-1 1', 3600),
-            array('y-M-d K', '1970-1-1 10', 36000),
-            array('y-M-d KK', '1970-1-1 11', 39600),
-            array('y-M-d KK', '1970-1-1 12', 43200),
-            array('y-M-d KK a', '1970-1-1 0 AM', 0),
-            array('y-M-d KK a', '1970-1-1 1 AM', 3600),
-            array('y-M-d KK a', '1970-1-1 10 AM', 36000),
-            array('y-M-d KK a', '1970-1-1 11 AM', 39600),
-            array('y-M-d KK a', '1970-1-1 12 AM', 43200),
-            array('y-M-d KK a', '1970-1-1 23 AM', 82800),
-            array('y-M-d KK a', '1970-1-1 24 AM', 86400),
-            array('y-M-d KK a', '1970-1-1 0 PM', 43200),
-            array('y-M-d KK a', '1970-1-1 1 PM', 46800),
-            array('y-M-d KK a', '1970-1-1 10 PM', 79200),
-            array('y-M-d KK a', '1970-1-1 11 PM', 82800),
-            array('y-M-d KK a', '1970-1-1 12 PM', 86400),
-            array('y-M-d KK a', '1970-1-1 23 PM', 126000),
-            array('y-M-d KK a', '1970-1-1 24 PM', 129600),
-        );
+            ['y-M-d K', '1970-1-1 1', 3600],
+            ['y-M-d K', '1970-1-1 10', 36000],
+            ['y-M-d KK', '1970-1-1 11', 39600],
+            ['y-M-d KK', '1970-1-1 12', 43200],
+            ['y-M-d KK a', '1970-1-1 0 AM', 0],
+            ['y-M-d KK a', '1970-1-1 1 AM', 3600],
+            ['y-M-d KK a', '1970-1-1 10 AM', 36000],
+            ['y-M-d KK a', '1970-1-1 11 AM', 39600],
+            ['y-M-d KK a', '1970-1-1 12 AM', 43200],
+            ['y-M-d KK a', '1970-1-1 23 AM', 82800],
+            ['y-M-d KK a', '1970-1-1 24 AM', 86400],
+            ['y-M-d KK a', '1970-1-1 0 PM', 43200],
+            ['y-M-d KK a', '1970-1-1 1 PM', 46800],
+            ['y-M-d KK a', '1970-1-1 10 PM', 79200],
+            ['y-M-d KK a', '1970-1-1 11 PM', 82800],
+            ['y-M-d KK a', '1970-1-1 12 PM', 86400],
+            ['y-M-d KK a', '1970-1-1 23 PM', 126000],
+            ['y-M-d KK a', '1970-1-1 24 PM', 129600],
+        ];
     }
 
     public function parseHour24ClockOneBasedProvider()
     {
-        return array(
+        return [
             // 24 hours (1-24)
-            array('y-M-d k', '1970-1-1 1', 3600),
-            array('y-M-d k', '1970-1-1 10', 36000),
-            array('y-M-d kk', '1970-1-1 11', 39600),
-            array('y-M-d kk', '1970-1-1 12', 43200),
-            array('y-M-d kk', '1970-1-1 23', 82800),
-            array('y-M-d kk', '1970-1-1 24', 0),
-            array('y-M-d kk a', '1970-1-1 0 AM', 0),
-            array('y-M-d kk a', '1970-1-1 1 AM', 0),
-            array('y-M-d kk a', '1970-1-1 10 AM', 0),
-            array('y-M-d kk a', '1970-1-1 11 AM', 0),
-            array('y-M-d kk a', '1970-1-1 12 AM', 0),
-            array('y-M-d kk a', '1970-1-1 23 AM', 0),
-            array('y-M-d kk a', '1970-1-1 24 AM', 0),
-            array('y-M-d kk a', '1970-1-1 0 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 1 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 10 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 11 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 12 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 23 PM', 43200),
-            array('y-M-d kk a', '1970-1-1 24 PM', 43200),
-        );
+            ['y-M-d k', '1970-1-1 1', 3600],
+            ['y-M-d k', '1970-1-1 10', 36000],
+            ['y-M-d kk', '1970-1-1 11', 39600],
+            ['y-M-d kk', '1970-1-1 12', 43200],
+            ['y-M-d kk', '1970-1-1 23', 82800],
+            ['y-M-d kk', '1970-1-1 24', 0],
+            ['y-M-d kk a', '1970-1-1 0 AM', 0],
+            ['y-M-d kk a', '1970-1-1 1 AM', 0],
+            ['y-M-d kk a', '1970-1-1 10 AM', 0],
+            ['y-M-d kk a', '1970-1-1 11 AM', 0],
+            ['y-M-d kk a', '1970-1-1 12 AM', 0],
+            ['y-M-d kk a', '1970-1-1 23 AM', 0],
+            ['y-M-d kk a', '1970-1-1 24 AM', 0],
+            ['y-M-d kk a', '1970-1-1 0 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 1 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 10 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 11 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 12 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 23 PM', 43200],
+            ['y-M-d kk a', '1970-1-1 24 PM', 43200],
+        ];
     }
 
     public function parseHour24ClockZeroBasedProvider()
     {
-        return array(
+        return [
             // 24 hours (0-23)
-            array('y-M-d H', '1970-1-1 0', 0),
-            array('y-M-d H', '1970-1-1 1', 3600),
-            array('y-M-d H', '1970-1-1 10', 36000),
-            array('y-M-d HH', '1970-1-1 11', 39600),
-            array('y-M-d HH', '1970-1-1 12', 43200),
-            array('y-M-d HH', '1970-1-1 23', 82800),
-            array('y-M-d HH a', '1970-1-1 0 AM', 0),
-            array('y-M-d HH a', '1970-1-1 1 AM', 0),
-            array('y-M-d HH a', '1970-1-1 10 AM', 0),
-            array('y-M-d HH a', '1970-1-1 11 AM', 0),
-            array('y-M-d HH a', '1970-1-1 12 AM', 0),
-            array('y-M-d HH a', '1970-1-1 23 AM', 0),
-            array('y-M-d HH a', '1970-1-1 24 AM', 0),
-            array('y-M-d HH a', '1970-1-1 0 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 1 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 10 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 11 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 12 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 23 PM', 43200),
-            array('y-M-d HH a', '1970-1-1 24 PM', 43200),
-        );
+            ['y-M-d H', '1970-1-1 0', 0],
+            ['y-M-d H', '1970-1-1 1', 3600],
+            ['y-M-d H', '1970-1-1 10', 36000],
+            ['y-M-d HH', '1970-1-1 11', 39600],
+            ['y-M-d HH', '1970-1-1 12', 43200],
+            ['y-M-d HH', '1970-1-1 23', 82800],
+            ['y-M-d HH a', '1970-1-1 0 AM', 0],
+            ['y-M-d HH a', '1970-1-1 1 AM', 0],
+            ['y-M-d HH a', '1970-1-1 10 AM', 0],
+            ['y-M-d HH a', '1970-1-1 11 AM', 0],
+            ['y-M-d HH a', '1970-1-1 12 AM', 0],
+            ['y-M-d HH a', '1970-1-1 23 AM', 0],
+            ['y-M-d HH a', '1970-1-1 24 AM', 0],
+            ['y-M-d HH a', '1970-1-1 0 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 1 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 10 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 11 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 12 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 23 PM', 43200],
+            ['y-M-d HH a', '1970-1-1 24 PM', 43200],
+        ];
     }
 
     public function parseMinuteProvider()
     {
-        return array(
-            array('y-M-d HH:m', '1970-1-1 0:1', 60),
-            array('y-M-d HH:mm', '1970-1-1 0:10', 600),
-        );
+        return [
+            ['y-M-d HH:m', '1970-1-1 0:1', 60],
+            ['y-M-d HH:mm', '1970-1-1 0:10', 600],
+        ];
     }
 
     public function parseSecondProvider()
     {
-        return array(
-            array('y-M-d HH:mm:s', '1970-1-1 00:01:1', 61),
-            array('y-M-d HH:mm:ss', '1970-1-1 00:01:10', 70),
-        );
+        return [
+            ['y-M-d HH:mm:s', '1970-1-1 00:01:1', 61],
+            ['y-M-d HH:mm:ss', '1970-1-1 00:01:10', 70],
+        ];
     }
 
     public function parseTimezoneProvider()
     {
-        return array(
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-03:00', 10800),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-04:00', 14400),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-00:00', 0),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+03:00', -10800),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+04:00', -14400),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-0300', 10800),
-            array('y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+0300', -10800),
+        return [
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-03:00', 10800],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-04:00', 14400],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-00:00', 0],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+03:00', -10800],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+04:00', -14400],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT-0300', 10800],
+            ['y-M-d HH:mm:ss zzzz', '1970-1-1 00:00:00 GMT+0300', -10800],
 
             // a previous timezone parsing should not change the timezone for the next parsing
-            array('y-M-d HH:mm:ss', '1970-1-1 00:00:00', 0),
-        );
+            ['y-M-d HH:mm:ss', '1970-1-1 00:00:00', 0],
+        ];
     }
 
     public function parseAmPmProvider()
     {
-        return array(
+        return [
             // AM/PM (already covered by hours tests)
-            array('y-M-d HH:mm:ss a', '1970-1-1 00:00:00 AM', 0),
-            array('y-M-d HH:mm:ss a', '1970-1-1 00:00:00 PM', 43200),
-        );
+            ['y-M-d HH:mm:ss a', '1970-1-1 00:00:00 AM', 0],
+            ['y-M-d HH:mm:ss a', '1970-1-1 00:00:00 PM', 43200],
+        ];
     }
 
     public function parseStandaloneAmPmProvider()
     {
-        return array(
-            array('a', 'AM', 0),
-            array('a', 'PM', 43200),
-        );
+        return [
+            ['a', 'AM', 0],
+            ['a', 'PM', 43200],
+        ];
     }
 
     public function parseRegexMetaCharsProvider()
     {
-        return array(
+        return [
             // regexp meta chars in the pattern string
-            array('y[M-d', '1970[1-1', 0),
-            array('y[M/d', '1970[1/1', 0),
-        );
+            ['y[M-d', '1970[1-1', 0],
+            ['y[M/d', '1970[1/1', 0],
+        ];
     }
 
     public function parseQuoteCharsProvider()
     {
-        return array(
-            array("'M'", 'M', 0),
-            array("'yy'", 'yy', 0),
-            array("'''yy'", "'yy", 0),
-            array("''y", "'1970", 0),
-            array("H 'o'' clock'", "0 o' clock", 0),
-        );
+        return [
+            ["'M'", 'M', 0],
+            ["'yy'", 'yy', 0],
+            ["'''yy'", "'yy", 0],
+            ["''y", "'1970", 0],
+            ["H 'o'' clock'", "0 o' clock", 0],
+        ];
     }
 
     public function parseDashSlashProvider()
     {
-        return array(
-            array('y-M-d', '1970/1/1', 0),
-            array('yy-M-d', '70/1/1', 0),
-            array('y/M/d', '1970-1-1', 0),
-            array('yy/M/d', '70-1-1', 0),
-        );
+        return [
+            ['y-M-d', '1970/1/1', 0],
+            ['yy-M-d', '70/1/1', 0],
+            ['y/M/d', '1970-1-1', 0],
+            ['yy/M/d', '70-1-1', 0],
+        ];
     }
 
     /**
@@ -841,15 +841,15 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function parseErrorProvider()
     {
-        return array(
+        return [
             // 1 char month
-            array('y-MMMMM-d', '1970-J-1'),
-            array('y-MMMMM-d', '1970-S-1'),
+            ['y-MMMMM-d', '1970-J-1'],
+            ['y-MMMMM-d', '1970-S-1'],
 
             // standalone 1 char month
-            array('y-LLLLL-d', '1970-J-1'),
-            array('y-LLLLL-d', '1970-S-1'),
-        );
+            ['y-LLLLL-d', '1970-J-1'],
+            ['y-LLLLL-d', '1970-S-1'],
+        ];
     }
 
     /*
@@ -892,16 +892,16 @@ abstract class AbstractIntlDateFormatterTest extends TestCase
 
     public function setTimeZoneIdProvider()
     {
-        return array(
-            array('UTC', 'UTC'),
-            array('GMT', 'GMT'),
-            array('GMT-03:00', 'GMT-03:00'),
-            array('Europe/Zurich', 'Europe/Zurich'),
-            array(null, date_default_timezone_get()),
-            array('Foo/Bar', 'UTC'),
-            array('GMT+00:AA', 'UTC'),
-            array('GMT+00AA', 'UTC'),
-        );
+        return [
+            ['UTC', 'UTC'],
+            ['GMT', 'GMT'],
+            ['GMT-03:00', 'GMT-03:00'],
+            ['Europe/Zurich', 'Europe/Zurich'],
+            [null, date_default_timezone_get()],
+            ['Foo/Bar', 'UTC'],
+            ['GMT+00:AA', 'UTC'],
+            ['GMT+00AA', 'UTC'],
+        ];
     }
 
     protected function getDefaultDateFormatter($pattern = null)
diff --git a/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php b/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
index 15c4e9e2ff..9905e326e0 100644
--- a/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/DateFormatter/IntlDateFormatterTest.php
@@ -52,7 +52,7 @@ class IntlDateFormatterTest extends AbstractIntlDateFormatterTest
     {
         $formatter = $this->getDefaultDateFormatter();
 
-        $localtime = array(
+        $localtime = [
             'tm_sec' => 59,
             'tm_min' => 3,
             'tm_hour' => 15,
@@ -62,7 +62,7 @@ class IntlDateFormatterTest extends AbstractIntlDateFormatterTest
             'tm_wday' => 0,
             'tm_yday' => 105,
             'tm_isdst' => 0,
-        );
+        ];
 
         try {
             $formatter->format($localtime);
@@ -89,7 +89,7 @@ class IntlDateFormatterTest extends AbstractIntlDateFormatterTest
     public function testFormatWithNonIntegerTimestamp()
     {
         $formatter = $this->getDefaultDateFormatter();
-        $formatter->format(array());
+        $formatter->format([]);
     }
 
     public function testGetErrorCode()
@@ -220,7 +220,7 @@ class IntlDateFormatterTest extends AbstractIntlDateFormatterTest
     private function notImplemented(array $dataSets)
     {
         return array_map(function (array $row) {
-            return array($row[0], $row[1], 0);
+            return [$row[0], $row[1], 0];
         }, $dataSets);
     }
 }
diff --git a/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php b/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
index 57c75fb954..2cb49ef827 100644
--- a/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
+++ b/src/Symfony/Component/Intl/Tests/Globals/AbstractIntlGlobalsTest.php
@@ -22,13 +22,13 @@ abstract class AbstractIntlGlobalsTest extends TestCase
 {
     public function errorNameProvider()
     {
-        return array(
-            array(-129, '[BOGUS UErrorCode]'),
-            array(0, 'U_ZERO_ERROR'),
-            array(1, 'U_ILLEGAL_ARGUMENT_ERROR'),
-            array(9, 'U_PARSE_ERROR'),
-            array(129, '[BOGUS UErrorCode]'),
-        );
+        return [
+            [-129, '[BOGUS UErrorCode]'],
+            [0, 'U_ZERO_ERROR'],
+            [1, 'U_ILLEGAL_ARGUMENT_ERROR'],
+            [9, 'U_PARSE_ERROR'],
+            [129, '[BOGUS UErrorCode]'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php b/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
index 1d2e47076f..e7bdb7102a 100644
--- a/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/Locale/LocaleTest.php
@@ -39,11 +39,11 @@ class LocaleTest extends AbstractLocaleTest
      */
     public function testComposeLocale()
     {
-        $subtags = array(
+        $subtags = [
             'language' => 'pt',
             'script' => 'Latn',
             'region' => 'BR',
-        );
+        ];
         $this->call('composeLocale', $subtags);
     }
 
@@ -140,10 +140,10 @@ class LocaleTest extends AbstractLocaleTest
      */
     public function testLookup()
     {
-        $langtag = array(
+        $langtag = [
             'pt-Latn-BR',
             'pt-BR',
-        );
+        ];
         $this->call('lookup', $langtag, 'pt-BR-x-priv1');
     }
 
diff --git a/src/Symfony/Component/Intl/Tests/LocaleTest.php b/src/Symfony/Component/Intl/Tests/LocaleTest.php
index 57059af9ae..ff908cbcab 100644
--- a/src/Symfony/Component/Intl/Tests/LocaleTest.php
+++ b/src/Symfony/Component/Intl/Tests/LocaleTest.php
@@ -18,22 +18,22 @@ class LocaleTest extends TestCase
 {
     public function provideGetFallbackTests()
     {
-        $tests = array(
-            array('sl_Latn_IT', 'sl_Latn_IT_nedis'),
-            array('sl_Latn', 'sl_Latn_IT'),
-            array('fr', 'fr_FR'),
-            array('fr', 'fr-FR'),
-            array('en', 'fr'),
-            array('root', 'en'),
-            array(null, 'root'),
-        );
+        $tests = [
+            ['sl_Latn_IT', 'sl_Latn_IT_nedis'],
+            ['sl_Latn', 'sl_Latn_IT'],
+            ['fr', 'fr_FR'],
+            ['fr', 'fr-FR'],
+            ['en', 'fr'],
+            ['root', 'en'],
+            [null, 'root'],
+        ];
 
         if (\function_exists('locale_parse')) {
-            $tests[] = array('sl_Latn_IT', 'sl-Latn-IT-nedis');
-            $tests[] = array('sl_Latn', 'sl-Latn_IT');
+            $tests[] = ['sl_Latn_IT', 'sl-Latn-IT-nedis'];
+            $tests[] = ['sl_Latn', 'sl-Latn_IT'];
         } else {
-            $tests[] = array('sl-Latn-IT', 'sl-Latn-IT-nedis');
-            $tests[] = array('sl-Latn', 'sl-Latn-IT');
+            $tests[] = ['sl-Latn-IT', 'sl-Latn-IT-nedis'];
+            $tests[] = ['sl-Latn', 'sl-Latn-IT'];
         }
 
         return $tests;
diff --git a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
index 560306df78..811269648d 100644
--- a/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
+++ b/src/Symfony/Component/Intl/Tests/NumberFormatter/AbstractNumberFormatterTest.php
@@ -33,23 +33,23 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatCurrencyWithDecimalStyleProvider()
     {
-        return array(
-            array(100, 'ALL', '100'),
-            array(100, 'BRL', '100.00'),
-            array(100, 'CRC', '100'),
-            array(100, 'JPY', '100'),
-            array(100, 'CHF', '100'),
-            array(-100, 'ALL', '-100'),
-            array(-100, 'BRL', '-100'),
-            array(-100, 'CRC', '-100'),
-            array(-100, 'JPY', '-100'),
-            array(-100, 'CHF', '-100'),
-            array(1000.12, 'ALL', '1,000.12'),
-            array(1000.12, 'BRL', '1,000.12'),
-            array(1000.12, 'CRC', '1,000.12'),
-            array(1000.12, 'JPY', '1,000.12'),
-            array(1000.12, 'CHF', '1,000.12'),
-        );
+        return [
+            [100, 'ALL', '100'],
+            [100, 'BRL', '100.00'],
+            [100, 'CRC', '100'],
+            [100, 'JPY', '100'],
+            [100, 'CHF', '100'],
+            [-100, 'ALL', '-100'],
+            [-100, 'BRL', '-100'],
+            [-100, 'CRC', '-100'],
+            [-100, 'JPY', '-100'],
+            [-100, 'CHF', '-100'],
+            [1000.12, 'ALL', '1,000.12'],
+            [1000.12, 'BRL', '1,000.12'],
+            [1000.12, 'CRC', '1,000.12'],
+            [1000.12, 'JPY', '1,000.12'],
+            [1000.12, 'CHF', '1,000.12'],
+        ];
     }
 
     /**
@@ -65,19 +65,19 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatCurrencyWithCurrencyStyleProvider()
     {
-        return array(
-            array(100, 'ALL', "ALL\xc2\xa0100"),
-            array(-100, 'ALL', "-ALL\xc2\xa0100"),
-            array(1000.12, 'ALL', "ALL\xc2\xa01,000"),
+        return [
+            [100, 'ALL', "ALL\xc2\xa0100"],
+            [-100, 'ALL', "-ALL\xc2\xa0100"],
+            [1000.12, 'ALL', "ALL\xc2\xa01,000"],
 
-            array(100, 'JPY', '¥100'),
-            array(-100, 'JPY', '-¥100'),
-            array(1000.12, 'JPY', '¥1,000'),
+            [100, 'JPY', '¥100'],
+            [-100, 'JPY', '-¥100'],
+            [1000.12, 'JPY', '¥1,000'],
 
-            array(100, 'EUR', '€100.00'),
-            array(-100, 'EUR', '-€100.00'),
-            array(1000.12, 'EUR', '€1,000.12'),
-        );
+            [100, 'EUR', '€100.00'],
+            [-100, 'EUR', '-€100.00'],
+            [1000.12, 'EUR', '€1,000.12'],
+        ];
     }
 
     /**
@@ -93,11 +93,11 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatCurrencyWithCurrencyStyleCostaRicanColonsRoundingProvider()
     {
-        return array(
-            array(100, 'CRC', 'CRC', "%s\xc2\xa0100.00"),
-            array(-100, 'CRC', 'CRC', "-%s\xc2\xa0100.00"),
-            array(1000.12, 'CRC', 'CRC', "%s\xc2\xa01,000.12"),
-        );
+        return [
+            [100, 'CRC', 'CRC', "%s\xc2\xa0100.00"],
+            [-100, 'CRC', 'CRC', "-%s\xc2\xa0100.00"],
+            [1000.12, 'CRC', 'CRC', "%s\xc2\xa01,000.12"],
+        ];
     }
 
     /**
@@ -111,20 +111,20 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatCurrencyWithCurrencyStyleBrazilianRealRoundingProvider()
     {
-        return array(
-            array(100, 'BRL', 'R', '%s$100.00'),
-            array(-100, 'BRL', 'R', '-%s$100.00'),
-            array(1000.12, 'BRL', 'R', '%s$1,000.12'),
+        return [
+            [100, 'BRL', 'R', '%s$100.00'],
+            [-100, 'BRL', 'R', '-%s$100.00'],
+            [1000.12, 'BRL', 'R', '%s$1,000.12'],
 
             // Rounding checks
-            array(1000.121, 'BRL', 'R', '%s$1,000.12'),
-            array(1000.123, 'BRL', 'R', '%s$1,000.12'),
-            array(1000.125, 'BRL', 'R', '%s$1,000.12'),
-            array(1000.127, 'BRL', 'R', '%s$1,000.13'),
-            array(1000.129, 'BRL', 'R', '%s$1,000.13'),
-            array(11.50999, 'BRL', 'R', '%s$11.51'),
-            array(11.9999464, 'BRL', 'R', '%s$12.00'),
-        );
+            [1000.121, 'BRL', 'R', '%s$1,000.12'],
+            [1000.123, 'BRL', 'R', '%s$1,000.12'],
+            [1000.125, 'BRL', 'R', '%s$1,000.12'],
+            [1000.127, 'BRL', 'R', '%s$1,000.13'],
+            [1000.129, 'BRL', 'R', '%s$1,000.13'],
+            [11.50999, 'BRL', 'R', '%s$11.51'],
+            [11.9999464, 'BRL', 'R', '%s$12.00'],
+        ];
     }
 
     /**
@@ -140,24 +140,24 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatCurrencyWithCurrencyStyleSwissRoundingProvider()
     {
-        return array(
-            array(100, 'CHF', 'CHF', "%s\xc2\xa0100.00"),
-            array(-100, 'CHF', 'CHF', "-%s\xc2\xa0100.00"),
-            array(1000.12, 'CHF', 'CHF', "%s\xc2\xa01,000.12"),
-            array('1000.12', 'CHF', 'CHF', "%s\xc2\xa01,000.12"),
+        return [
+            [100, 'CHF', 'CHF', "%s\xc2\xa0100.00"],
+            [-100, 'CHF', 'CHF', "-%s\xc2\xa0100.00"],
+            [1000.12, 'CHF', 'CHF', "%s\xc2\xa01,000.12"],
+            ['1000.12', 'CHF', 'CHF', "%s\xc2\xa01,000.12"],
 
             // Rounding checks
-            array(1000.121, 'CHF', 'CHF', "%s\xc2\xa01,000.12"),
-            array(1000.123, 'CHF', 'CHF', "%s\xc2\xa01,000.12"),
-            array(1000.125, 'CHF', 'CHF', "%s\xc2\xa01,000.12"),
-            array(1000.127, 'CHF', 'CHF', "%s\xc2\xa01,000.13"),
-            array(1000.129, 'CHF', 'CHF', "%s\xc2\xa01,000.13"),
+            [1000.121, 'CHF', 'CHF', "%s\xc2\xa01,000.12"],
+            [1000.123, 'CHF', 'CHF', "%s\xc2\xa01,000.12"],
+            [1000.125, 'CHF', 'CHF', "%s\xc2\xa01,000.12"],
+            [1000.127, 'CHF', 'CHF', "%s\xc2\xa01,000.13"],
+            [1000.129, 'CHF', 'CHF', "%s\xc2\xa01,000.13"],
 
-            array(1200000.00, 'CHF', 'CHF', "%s\xc2\xa01,200,000.00"),
-            array(1200000.1, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"),
-            array(1200000.10, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"),
-            array(1200000.101, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"),
-        );
+            [1200000.00, 'CHF', 'CHF', "%s\xc2\xa01,200,000.00"],
+            [1200000.1, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"],
+            [1200000.10, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"],
+            [1200000.101, 'CHF', 'CHF', "%s\xc2\xa01,200,000.10"],
+        ];
     }
 
     public function testFormat()
@@ -199,12 +199,12 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
         $message = '->format() TYPE_INT32 formats inconsistently an integer if out of the 32 bit range.';
 
-        return array(
-            array($formatter, 1, '1'),
-            array($formatter, 1.1, '1'),
-            array($formatter, 2147483648, '-2,147,483,648', $message),
-            array($formatter, -2147483649, '2,147,483,647', $message),
-        );
+        return [
+            [$formatter, 1, '1'],
+            [$formatter, 1.1, '1'],
+            [$formatter, 2147483648, '-2,147,483,648', $message],
+            [$formatter, -2147483649, '2,147,483,647', $message],
+        ];
     }
 
     /**
@@ -224,12 +224,12 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
         $message = '->format() TYPE_INT32 formats inconsistently an integer if out of the 32 bit range.';
 
-        return array(
-            array($formatter, 1, '¤1.00'),
-            array($formatter, 1.1, '¤1.00'),
-            array($formatter, 2147483648, '-¤2,147,483,648.00', $message),
-            array($formatter, -2147483649, '¤2,147,483,647.00', $message),
-        );
+        return [
+            [$formatter, 1, '¤1.00'],
+            [$formatter, 1.1, '¤1.00'],
+            [$formatter, 2147483648, '-¤2,147,483,648.00', $message],
+            [$formatter, -2147483649, '¤2,147,483,647.00', $message],
+        ];
     }
 
     /**
@@ -247,12 +247,12 @@ abstract class AbstractNumberFormatterTest extends TestCase
     {
         $formatter = $this->getNumberFormatter('en', NumberFormatter::DECIMAL);
 
-        return array(
-            array($formatter, 1, '1'),
-            array($formatter, 1.1, '1'),
-            array($formatter, 2147483648, '2,147,483,648'),
-            array($formatter, -2147483649, '-2,147,483,649'),
-        );
+        return [
+            [$formatter, 1, '1'],
+            [$formatter, 1.1, '1'],
+            [$formatter, 2147483648, '2,147,483,648'],
+            [$formatter, -2147483649, '-2,147,483,649'],
+        ];
     }
 
     /**
@@ -270,12 +270,12 @@ abstract class AbstractNumberFormatterTest extends TestCase
     {
         $formatter = $this->getNumberFormatter('en', NumberFormatter::CURRENCY);
 
-        return array(
-            array($formatter, 1, '¤1.00'),
-            array($formatter, 1.1, '¤1.00'),
-            array($formatter, 2147483648, '¤2,147,483,648.00'),
-            array($formatter, -2147483649, '-¤2,147,483,649.00'),
-        );
+        return [
+            [$formatter, 1, '¤1.00'],
+            [$formatter, 1.1, '¤1.00'],
+            [$formatter, 2147483648, '¤2,147,483,648.00'],
+            [$formatter, -2147483649, '-¤2,147,483,649.00'],
+        ];
     }
 
     /**
@@ -291,10 +291,10 @@ abstract class AbstractNumberFormatterTest extends TestCase
     {
         $formatter = $this->getNumberFormatter('en', NumberFormatter::DECIMAL);
 
-        return array(
-            array($formatter, 1, '1'),
-            array($formatter, 1.1, '1.1'),
-        );
+        return [
+            [$formatter, 1, '1'],
+            [$formatter, 1.1, '1.1'],
+        ];
     }
 
     /**
@@ -312,10 +312,10 @@ abstract class AbstractNumberFormatterTest extends TestCase
     {
         $formatter = $this->getNumberFormatter('en', NumberFormatter::CURRENCY);
 
-        return array(
-            array($formatter, 1, '¤1.00'),
-            array($formatter, 1.1, '¤1.10'),
-        );
+        return [
+            [$formatter, 1, '¤1.00'],
+            [$formatter, 1.1, '¤1.10'],
+        ];
     }
 
     /**
@@ -347,10 +347,10 @@ abstract class AbstractNumberFormatterTest extends TestCase
         $df = $this->getNumberFormatter('en', NumberFormatter::DECIMAL);
         $cf = $this->getNumberFormatter('en', NumberFormatter::CURRENCY);
 
-        return array(
-            array($df, 1),
-            array($cf, 1),
-        );
+        return [
+            [$df, 1],
+            [$cf, 1],
+        ];
     }
 
     /**
@@ -378,14 +378,14 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatFractionDigitsProvider()
     {
-        return array(
-            array(1.123, '1.123', null, 0),
-            array(1.123, '1', 0, 0),
-            array(1.123, '1.1', 1, 1),
-            array(1.123, '1.12', 2, 2),
-            array(1.123, '1.123', -1, 0),
-            array(1.123, '1', 'abc', 0),
-        );
+        return [
+            [1.123, '1.123', null, 0],
+            [1.123, '1', 0, 0],
+            [1.123, '1.1', 1, 1],
+            [1.123, '1.12', 2, 2],
+            [1.123, '1.123', -1, 0],
+            [1.123, '1', 'abc', 0],
+        ];
     }
 
     /**
@@ -411,14 +411,14 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatGroupingUsedProvider()
     {
-        return array(
-            array(1000, '1,000', null, 1),
-            array(1000, '1000', 0, 0),
-            array(1000, '1,000', 1, 1),
-            array(1000, '1,000', 2, 1),
-            array(1000, '1000', 'abc', 0),
-            array(1000, '1,000', -1, 1),
-        );
+        return [
+            [1000, '1,000', null, 1],
+            [1000, '1000', 0, 0],
+            [1000, '1,000', 1, 1],
+            [1000, '1,000', 2, 1],
+            [1000, '1000', 'abc', 0],
+            [1000, '1,000', -1, 1],
+        ];
     }
 
     /**
@@ -436,14 +436,14 @@ abstract class AbstractNumberFormatterTest extends TestCase
     public function formatRoundingModeRoundHalfUpProvider()
     {
         // The commented value is differently rounded by intl's NumberFormatter in 32 and 64 bit architectures
-        return array(
-            array(1.121, '1.12'),
-            array(1.123, '1.12'),
-            // array(1.125, '1.13'),
-            array(1.127, '1.13'),
-            array(1.129, '1.13'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.121, '1.12'],
+            [1.123, '1.12'],
+            // [1.125, '1.13'],
+            [1.127, '1.13'],
+            [1.129, '1.13'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -460,14 +460,14 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundHalfDownProvider()
     {
-        return array(
-            array(1.121, '1.12'),
-            array(1.123, '1.12'),
-            array(1.125, '1.12'),
-            array(1.127, '1.13'),
-            array(1.129, '1.13'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.121, '1.12'],
+            [1.123, '1.12'],
+            [1.125, '1.12'],
+            [1.127, '1.13'],
+            [1.129, '1.13'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -484,14 +484,14 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundHalfEvenProvider()
     {
-        return array(
-            array(1.121, '1.12'),
-            array(1.123, '1.12'),
-            array(1.125, '1.12'),
-            array(1.127, '1.13'),
-            array(1.129, '1.13'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.121, '1.12'],
+            [1.123, '1.12'],
+            [1.125, '1.12'],
+            [1.127, '1.13'],
+            [1.129, '1.13'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -508,15 +508,15 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundCeilingProvider()
     {
-        return array(
-            array(1.123, '1.13'),
-            array(1.125, '1.13'),
-            array(1.127, '1.13'),
-            array(-1.123, '-1.12'),
-            array(-1.125, '-1.12'),
-            array(-1.127, '-1.12'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.123, '1.13'],
+            [1.125, '1.13'],
+            [1.127, '1.13'],
+            [-1.123, '-1.12'],
+            [-1.125, '-1.12'],
+            [-1.127, '-1.12'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -533,15 +533,15 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundFloorProvider()
     {
-        return array(
-            array(1.123, '1.12'),
-            array(1.125, '1.12'),
-            array(1.127, '1.12'),
-            array(-1.123, '-1.13'),
-            array(-1.125, '-1.13'),
-            array(-1.127, '-1.13'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.123, '1.12'],
+            [1.125, '1.12'],
+            [1.127, '1.12'],
+            [-1.123, '-1.13'],
+            [-1.125, '-1.13'],
+            [-1.127, '-1.13'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -558,15 +558,15 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundDownProvider()
     {
-        return array(
-            array(1.123, '1.12'),
-            array(1.125, '1.12'),
-            array(1.127, '1.12'),
-            array(-1.123, '-1.12'),
-            array(-1.125, '-1.12'),
-            array(-1.127, '-1.12'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.123, '1.12'],
+            [1.125, '1.12'],
+            [1.127, '1.12'],
+            [-1.123, '-1.12'],
+            [-1.125, '-1.12'],
+            [-1.127, '-1.12'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     /**
@@ -583,15 +583,15 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function formatRoundingModeRoundUpProvider()
     {
-        return array(
-            array(1.123, '1.13'),
-            array(1.125, '1.13'),
-            array(1.127, '1.13'),
-            array(-1.123, '-1.13'),
-            array(-1.125, '-1.13'),
-            array(-1.127, '-1.13'),
-            array(1020 / 100, '10.20'),
-        );
+        return [
+            [1.123, '1.13'],
+            [1.125, '1.13'],
+            [1.127, '1.13'],
+            [-1.123, '-1.13'],
+            [-1.125, '-1.13'],
+            [-1.127, '-1.13'],
+            [1020 / 100, '10.20'],
+        ];
     }
 
     public function testGetLocale()
@@ -664,44 +664,44 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function parseProvider()
     {
-        return array(
-            array('prefix1', false, '->parse() does not parse a number with a string prefix.', 0),
-            array('prefix1', false, '->parse() does not parse a number with a string prefix.', 0, false),
-            array('1.4suffix', (float) 1.4, '->parse() parses a number with a string suffix.', 3),
-            array('1.4suffix', (float) 1.4, '->parse() parses a number with a string suffix.', 3, false),
-            array('1,234.4suffix', 1234.4, '->parse() parses a number with a string suffix.', 7),
-            array('1,234.4suffix', 1.0, '->parse() parses a number with a string suffix.', 1, false),
-            array('-.4suffix', (float) -0.4, '->parse() parses a negative dot float with suffix.', 3),
-            array('-.4suffix', (float) -0.4, '->parse() parses a negative dot float with suffix.', 3, false),
-            array(',4', false, '->parse() does not parse when invalid grouping used.', 0),
-            array(',4', false, '->parse() does not parse when invalid grouping used.', 0, false),
-            array('123,4', false, '->parse() does not parse when invalid grouping used.', 0),
-            array('123,4', 123.0, '->parse() truncates invalid grouping when grouping is disabled.', 3, false),
-            array('123,a4', 123.0, '->parse() truncates a string suffix.', 3),
-            array('123,a4', 123.0, '->parse() truncates a string suffix.', 3, false),
-            array('-123,4', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123,4', -123.0, '->parse() truncates invalid grouping when grouping is disabled.', 4, false),
-            array('-123,4567', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123,4567', -123.0, '->parse() truncates invalid grouping when grouping is disabled.', 4, false),
-            array('-123,456,789', -123456789.0, '->parse() parses a number with grouping.', 12),
-            array('-123,456,789', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false),
-            array('-123,456,789.66', -123456789.66, '->parse() parses a number with grouping.', 15),
-            array('-123,456,789.66', -123.00, '->parse() truncates a group if grouping is disabled.', 4, false),
-            array('-123,456789.66', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123,456789.66', -123.00, '->parse() truncates a group if grouping is disabled.', 4, false),
-            array('-123456,789.66', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123456,789.66', -123456.00, '->parse() truncates a group if grouping is disabled.', 7, false),
-            array('-123,456,78', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123,456,78', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false),
-            array('-123,45,789', false, '->parse() does not parse when invalid grouping used.', 1),
-            array('-123,45,789', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false),
-            array('-123,,456', -123.0, '->parse() parses when grouping is duplicated.', 4),
-            array('-123,,456', -123.0, '->parse() parses when grouping is disabled.', 4, false),
-            array('-123,,4', -123.0, '->parse() parses when grouping is duplicated.', 4),
-            array('-123,,4', -123.0, '->parse() parses when grouping is duplicated.', 4, false),
-            array('239.', 239.0, '->parse() parses when string ends with decimal separator.', 4),
-            array('239.', 239.0, '->parse() parses when string ends with decimal separator.', 4, false),
-        );
+        return [
+            ['prefix1', false, '->parse() does not parse a number with a string prefix.', 0],
+            ['prefix1', false, '->parse() does not parse a number with a string prefix.', 0, false],
+            ['1.4suffix', (float) 1.4, '->parse() parses a number with a string suffix.', 3],
+            ['1.4suffix', (float) 1.4, '->parse() parses a number with a string suffix.', 3, false],
+            ['1,234.4suffix', 1234.4, '->parse() parses a number with a string suffix.', 7],
+            ['1,234.4suffix', 1.0, '->parse() parses a number with a string suffix.', 1, false],
+            ['-.4suffix', (float) -0.4, '->parse() parses a negative dot float with suffix.', 3],
+            ['-.4suffix', (float) -0.4, '->parse() parses a negative dot float with suffix.', 3, false],
+            [',4', false, '->parse() does not parse when invalid grouping used.', 0],
+            [',4', false, '->parse() does not parse when invalid grouping used.', 0, false],
+            ['123,4', false, '->parse() does not parse when invalid grouping used.', 0],
+            ['123,4', 123.0, '->parse() truncates invalid grouping when grouping is disabled.', 3, false],
+            ['123,a4', 123.0, '->parse() truncates a string suffix.', 3],
+            ['123,a4', 123.0, '->parse() truncates a string suffix.', 3, false],
+            ['-123,4', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123,4', -123.0, '->parse() truncates invalid grouping when grouping is disabled.', 4, false],
+            ['-123,4567', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123,4567', -123.0, '->parse() truncates invalid grouping when grouping is disabled.', 4, false],
+            ['-123,456,789', -123456789.0, '->parse() parses a number with grouping.', 12],
+            ['-123,456,789', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false],
+            ['-123,456,789.66', -123456789.66, '->parse() parses a number with grouping.', 15],
+            ['-123,456,789.66', -123.00, '->parse() truncates a group if grouping is disabled.', 4, false],
+            ['-123,456789.66', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123,456789.66', -123.00, '->parse() truncates a group if grouping is disabled.', 4, false],
+            ['-123456,789.66', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123456,789.66', -123456.00, '->parse() truncates a group if grouping is disabled.', 7, false],
+            ['-123,456,78', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123,456,78', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false],
+            ['-123,45,789', false, '->parse() does not parse when invalid grouping used.', 1],
+            ['-123,45,789', -123.0, '->parse() truncates a group if grouping is disabled.', 4, false],
+            ['-123,,456', -123.0, '->parse() parses when grouping is duplicated.', 4],
+            ['-123,,456', -123.0, '->parse() parses when grouping is disabled.', 4, false],
+            ['-123,,4', -123.0, '->parse() parses when grouping is duplicated.', 4],
+            ['-123,,4', -123.0, '->parse() parses when grouping is duplicated.', 4, false],
+            ['239.', 239.0, '->parse() parses when string ends with decimal separator.', 4],
+            ['239.', 239.0, '->parse() parses when string ends with decimal separator.', 4, false],
+        ];
     }
 
     public function testParseTypeDefault()
@@ -730,15 +730,15 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function parseTypeInt32Provider()
     {
-        return array(
-            array('1', 1),
-            array('1.1', 1),
-            array('.1', 0),
-            array('2,147,483,647', 2147483647),
-            array('-2,147,483,648', -2147483647 - 1),
-            array('2,147,483,648', false, '->parse() TYPE_INT32 returns false when the number is greater than the integer positive range.'),
-            array('-2,147,483,649', false, '->parse() TYPE_INT32 returns false when the number is greater than the integer negative range.'),
-        );
+        return [
+            ['1', 1],
+            ['1.1', 1],
+            ['.1', 0],
+            ['2,147,483,647', 2147483647],
+            ['-2,147,483,648', -2147483647 - 1],
+            ['2,147,483,648', false, '->parse() TYPE_INT32 returns false when the number is greater than the integer positive range.'],
+            ['-2,147,483,649', false, '->parse() TYPE_INT32 returns false when the number is greater than the integer negative range.'],
+        ];
     }
 
     public function testParseTypeInt64With32BitIntegerInPhp32Bit()
@@ -822,12 +822,12 @@ abstract class AbstractNumberFormatterTest extends TestCase
 
     public function parseTypeDoubleProvider()
     {
-        return array(
-            array('1', (float) 1),
-            array('1.1', 1.1),
-            array('9,223,372,036,854,775,808', 9223372036854775808),
-            array('-9,223,372,036,854,775,809', -9223372036854775809),
-        );
+        return [
+            ['1', (float) 1],
+            ['1.1', 1.1],
+            ['9,223,372,036,854,775,808', 9223372036854775808],
+            ['-9,223,372,036,854,775,809', -9223372036854775809],
+        ];
     }
 
     public function testParseTypeCurrency()
diff --git a/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php b/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
index 2fe7a0e458..b037c33231 100644
--- a/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
+++ b/src/Symfony/Component/Intl/Tests/Util/IcuVersionTest.php
@@ -21,24 +21,24 @@ class IcuVersionTest extends TestCase
 {
     public function normalizeProvider()
     {
-        return array(
-            array(null, '1', '10'),
-            array(null, '1.2', '12'),
-            array(null, '1.2.3', '12.3'),
-            array(null, '1.2.3.4', '12.3.4'),
-            array(1, '1', '10'),
-            array(1, '1.2', '12'),
-            array(1, '1.2.3', '12'),
-            array(1, '1.2.3.4', '12'),
-            array(2, '1', '10'),
-            array(2, '1.2', '12'),
-            array(2, '1.2.3', '12.3'),
-            array(2, '1.2.3.4', '12.3'),
-            array(3, '1', '10'),
-            array(3, '1.2', '12'),
-            array(3, '1.2.3', '12.3'),
-            array(3, '1.2.3.4', '12.3.4'),
-        );
+        return [
+            [null, '1', '10'],
+            [null, '1.2', '12'],
+            [null, '1.2.3', '12.3'],
+            [null, '1.2.3.4', '12.3.4'],
+            [1, '1', '10'],
+            [1, '1.2', '12'],
+            [1, '1.2.3', '12'],
+            [1, '1.2.3.4', '12'],
+            [2, '1', '10'],
+            [2, '1.2', '12'],
+            [2, '1.2.3', '12.3'],
+            [2, '1.2.3.4', '12.3'],
+            [3, '1', '10'],
+            [3, '1.2', '12'],
+            [3, '1.2.3', '12.3'],
+            [3, '1.2.3.4', '12.3.4'],
+        ];
     }
 
     /**
@@ -51,55 +51,55 @@ class IcuVersionTest extends TestCase
 
     public function compareProvider()
     {
-        return array(
-            array(null, '1', '==', '1', true),
-            array(null, '1.0', '==', '1.1', false),
-            array(null, '1.0.0', '==', '1.0.1', false),
-            array(null, '1.0.0.0', '==', '1.0.0.1', false),
-            array(null, '1.0.0.0.0', '==', '1.0.0.0.1', false),
+        return [
+            [null, '1', '==', '1', true],
+            [null, '1.0', '==', '1.1', false],
+            [null, '1.0.0', '==', '1.0.1', false],
+            [null, '1.0.0.0', '==', '1.0.0.1', false],
+            [null, '1.0.0.0.0', '==', '1.0.0.0.1', false],
 
-            array(null, '1', '==', '10', true),
-            array(null, '1.0', '==', '11', false),
-            array(null, '1.0.0', '==', '10.1', false),
-            array(null, '1.0.0.0', '==', '10.0.1', false),
-            array(null, '1.0.0.0.0', '==', '10.0.0.1', false),
+            [null, '1', '==', '10', true],
+            [null, '1.0', '==', '11', false],
+            [null, '1.0.0', '==', '10.1', false],
+            [null, '1.0.0.0', '==', '10.0.1', false],
+            [null, '1.0.0.0.0', '==', '10.0.0.1', false],
 
-            array(1, '1', '==', '1', true),
-            array(1, '1.0', '==', '1.1', false),
-            array(1, '1.0.0', '==', '1.0.1', true),
-            array(1, '1.0.0.0', '==', '1.0.0.1', true),
-            array(1, '1.0.0.0.0', '==', '1.0.0.0.1', true),
+            [1, '1', '==', '1', true],
+            [1, '1.0', '==', '1.1', false],
+            [1, '1.0.0', '==', '1.0.1', true],
+            [1, '1.0.0.0', '==', '1.0.0.1', true],
+            [1, '1.0.0.0.0', '==', '1.0.0.0.1', true],
 
-            array(1, '1', '==', '10', true),
-            array(1, '1.0', '==', '11', false),
-            array(1, '1.0.0', '==', '10.1', true),
-            array(1, '1.0.0.0', '==', '10.0.1', true),
-            array(1, '1.0.0.0.0', '==', '10.0.0.1', true),
+            [1, '1', '==', '10', true],
+            [1, '1.0', '==', '11', false],
+            [1, '1.0.0', '==', '10.1', true],
+            [1, '1.0.0.0', '==', '10.0.1', true],
+            [1, '1.0.0.0.0', '==', '10.0.0.1', true],
 
-            array(2, '1', '==', '1', true),
-            array(2, '1.0', '==', '1.1', false),
-            array(2, '1.0.0', '==', '1.0.1', false),
-            array(2, '1.0.0.0', '==', '1.0.0.1', true),
-            array(2, '1.0.0.0.0', '==', '1.0.0.0.1', true),
+            [2, '1', '==', '1', true],
+            [2, '1.0', '==', '1.1', false],
+            [2, '1.0.0', '==', '1.0.1', false],
+            [2, '1.0.0.0', '==', '1.0.0.1', true],
+            [2, '1.0.0.0.0', '==', '1.0.0.0.1', true],
 
-            array(2, '1', '==', '10', true),
-            array(2, '1.0', '==', '11', false),
-            array(2, '1.0.0', '==', '10.1', false),
-            array(2, '1.0.0.0', '==', '10.0.1', true),
-            array(2, '1.0.0.0.0', '==', '10.0.0.1', true),
+            [2, '1', '==', '10', true],
+            [2, '1.0', '==', '11', false],
+            [2, '1.0.0', '==', '10.1', false],
+            [2, '1.0.0.0', '==', '10.0.1', true],
+            [2, '1.0.0.0.0', '==', '10.0.0.1', true],
 
-            array(3, '1', '==', '1', true),
-            array(3, '1.0', '==', '1.1', false),
-            array(3, '1.0.0', '==', '1.0.1', false),
-            array(3, '1.0.0.0', '==', '1.0.0.1', false),
-            array(3, '1.0.0.0.0', '==', '1.0.0.0.1', true),
+            [3, '1', '==', '1', true],
+            [3, '1.0', '==', '1.1', false],
+            [3, '1.0.0', '==', '1.0.1', false],
+            [3, '1.0.0.0', '==', '1.0.0.1', false],
+            [3, '1.0.0.0.0', '==', '1.0.0.0.1', true],
 
-            array(3, '1', '==', '10', true),
-            array(3, '1.0', '==', '11', false),
-            array(3, '1.0.0', '==', '10.1', false),
-            array(3, '1.0.0.0', '==', '10.0.1', false),
-            array(3, '1.0.0.0.0', '==', '10.0.0.1', true),
-        );
+            [3, '1', '==', '10', true],
+            [3, '1.0', '==', '11', false],
+            [3, '1.0.0', '==', '10.1', false],
+            [3, '1.0.0.0', '==', '10.0.1', false],
+            [3, '1.0.0.0.0', '==', '10.0.0.1', true],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Intl/Tests/Util/VersionTest.php b/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
index b570b3ae96..e3bb07ee5a 100644
--- a/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
+++ b/src/Symfony/Component/Intl/Tests/Util/VersionTest.php
@@ -21,28 +21,28 @@ class VersionTest extends TestCase
 {
     public function normalizeProvider()
     {
-        return array(
-            array(null, '1', '1'),
-            array(null, '1.2', '1.2'),
-            array(null, '1.2.3', '1.2.3'),
-            array(null, '1.2.3.4', '1.2.3.4'),
-            array(1, '1', '1'),
-            array(1, '1.2', '1'),
-            array(1, '1.2.3', '1'),
-            array(1, '1.2.3.4', '1'),
-            array(2, '1', '1'),
-            array(2, '1.2', '1.2'),
-            array(2, '1.2.3', '1.2'),
-            array(2, '1.2.3.4', '1.2'),
-            array(3, '1', '1'),
-            array(3, '1.2', '1.2'),
-            array(3, '1.2.3', '1.2.3'),
-            array(3, '1.2.3.4', '1.2.3'),
-            array(4, '1', '1'),
-            array(4, '1.2', '1.2'),
-            array(4, '1.2.3', '1.2.3'),
-            array(4, '1.2.3.4', '1.2.3.4'),
-        );
+        return [
+            [null, '1', '1'],
+            [null, '1.2', '1.2'],
+            [null, '1.2.3', '1.2.3'],
+            [null, '1.2.3.4', '1.2.3.4'],
+            [1, '1', '1'],
+            [1, '1.2', '1'],
+            [1, '1.2.3', '1'],
+            [1, '1.2.3.4', '1'],
+            [2, '1', '1'],
+            [2, '1.2', '1.2'],
+            [2, '1.2.3', '1.2'],
+            [2, '1.2.3.4', '1.2'],
+            [3, '1', '1'],
+            [3, '1.2', '1.2'],
+            [3, '1.2.3', '1.2.3'],
+            [3, '1.2.3.4', '1.2.3'],
+            [4, '1', '1'],
+            [4, '1.2', '1.2'],
+            [4, '1.2.3', '1.2.3'],
+            [4, '1.2.3.4', '1.2.3.4'],
+        ];
     }
 
     /**
@@ -55,27 +55,27 @@ class VersionTest extends TestCase
 
     public function compareProvider()
     {
-        return array(
-            array(null, '1', '==', '1', true),
-            array(null, '1.0', '==', '1.1', false),
-            array(null, '1.0.0', '==', '1.0.1', false),
-            array(null, '1.0.0.0', '==', '1.0.0.1', false),
+        return [
+            [null, '1', '==', '1', true],
+            [null, '1.0', '==', '1.1', false],
+            [null, '1.0.0', '==', '1.0.1', false],
+            [null, '1.0.0.0', '==', '1.0.0.1', false],
 
-            array(1, '1', '==', '1', true),
-            array(1, '1.0', '==', '1.1', true),
-            array(1, '1.0.0', '==', '1.0.1', true),
-            array(1, '1.0.0.0', '==', '1.0.0.1', true),
+            [1, '1', '==', '1', true],
+            [1, '1.0', '==', '1.1', true],
+            [1, '1.0.0', '==', '1.0.1', true],
+            [1, '1.0.0.0', '==', '1.0.0.1', true],
 
-            array(2, '1', '==', '1', true),
-            array(2, '1.0', '==', '1.1', false),
-            array(2, '1.0.0', '==', '1.0.1', true),
-            array(2, '1.0.0.0', '==', '1.0.0.1', true),
+            [2, '1', '==', '1', true],
+            [2, '1.0', '==', '1.1', false],
+            [2, '1.0.0', '==', '1.0.1', true],
+            [2, '1.0.0.0', '==', '1.0.0.1', true],
 
-            array(3, '1', '==', '1', true),
-            array(3, '1.0', '==', '1.1', false),
-            array(3, '1.0.0', '==', '1.0.1', false),
-            array(3, '1.0.0.0', '==', '1.0.0.1', true),
-        );
+            [3, '1', '==', '1', true],
+            [3, '1.0', '==', '1.1', false],
+            [3, '1.0.0', '==', '1.0.1', false],
+            [3, '1.0.0.0', '==', '1.0.0.1', true],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Ldap/Adapter/AbstractConnection.php b/src/Symfony/Component/Ldap/Adapter/AbstractConnection.php
index 67529b62e5..a43e2535d2 100644
--- a/src/Symfony/Component/Ldap/Adapter/AbstractConnection.php
+++ b/src/Symfony/Component/Ldap/Adapter/AbstractConnection.php
@@ -21,7 +21,7 @@ abstract class AbstractConnection implements ConnectionInterface
 {
     protected $config;
 
-    public function __construct(array $config = array())
+    public function __construct(array $config = [])
     {
         $resolver = new OptionsResolver();
 
@@ -37,13 +37,13 @@ abstract class AbstractConnection implements ConnectionInterface
      */
     protected function configureOptions(OptionsResolver $resolver)
     {
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'host' => 'localhost',
             'version' => 3,
             'connection_string' => null,
             'encryption' => 'none',
-            'options' => array(),
-        ));
+            'options' => [],
+        ]);
 
         $resolver->setDefault('port', function (Options $options) {
             return 'ssl' === $options['encryption'] ? 636 : 389;
@@ -57,7 +57,7 @@ abstract class AbstractConnection implements ConnectionInterface
         $resolver->setAllowedTypes('port', 'numeric');
         $resolver->setAllowedTypes('connection_string', 'string');
         $resolver->setAllowedTypes('version', 'numeric');
-        $resolver->setAllowedValues('encryption', array('none', 'ssl', 'tls'));
+        $resolver->setAllowedValues('encryption', ['none', 'ssl', 'tls']);
         $resolver->setAllowedTypes('options', 'array');
     }
 }
diff --git a/src/Symfony/Component/Ldap/Adapter/AbstractQuery.php b/src/Symfony/Component/Ldap/Adapter/AbstractQuery.php
index 4bba5c2ebe..442936b578 100644
--- a/src/Symfony/Component/Ldap/Adapter/AbstractQuery.php
+++ b/src/Symfony/Component/Ldap/Adapter/AbstractQuery.php
@@ -24,10 +24,10 @@ abstract class AbstractQuery implements QueryInterface
     protected $query;
     protected $options;
 
-    public function __construct(ConnectionInterface $connection, string $dn, string $query, array $options = array())
+    public function __construct(ConnectionInterface $connection, string $dn, string $query, array $options = [])
     {
         $resolver = new OptionsResolver();
-        $resolver->setDefaults(array(
+        $resolver->setDefaults([
             'filter' => '*',
             'maxItems' => 0,
             'sizeLimit' => 0,
@@ -35,12 +35,12 @@ abstract class AbstractQuery implements QueryInterface
             'deref' => static::DEREF_NEVER,
             'attrsOnly' => 0,
             'scope' => static::SCOPE_SUB,
-        ));
-        $resolver->setAllowedValues('deref', array(static::DEREF_ALWAYS, static::DEREF_NEVER, static::DEREF_FINDING, static::DEREF_SEARCHING));
-        $resolver->setAllowedValues('scope', array(static::SCOPE_BASE, static::SCOPE_ONE, static::SCOPE_SUB));
+        ]);
+        $resolver->setAllowedValues('deref', [static::DEREF_ALWAYS, static::DEREF_NEVER, static::DEREF_FINDING, static::DEREF_SEARCHING]);
+        $resolver->setAllowedValues('scope', [static::SCOPE_BASE, static::SCOPE_ONE, static::SCOPE_SUB]);
 
         $resolver->setNormalizer('filter', function (Options $options, $value) {
-            return \is_array($value) ? $value : array($value);
+            return \is_array($value) ? $value : [$value];
         });
 
         $this->connection = $connection;
diff --git a/src/Symfony/Component/Ldap/Adapter/AdapterInterface.php b/src/Symfony/Component/Ldap/Adapter/AdapterInterface.php
index f01e3528f8..3c2fb4b971 100644
--- a/src/Symfony/Component/Ldap/Adapter/AdapterInterface.php
+++ b/src/Symfony/Component/Ldap/Adapter/AdapterInterface.php
@@ -32,7 +32,7 @@ interface AdapterInterface
      *
      * @return QueryInterface
      */
-    public function createQuery($dn, $query, array $options = array());
+    public function createQuery($dn, $query, array $options = []);
 
     /**
      * Fetches the entry manager instance.
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Adapter.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Adapter.php
index fbc41af36b..0700f6ec58 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Adapter.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Adapter.php
@@ -23,7 +23,7 @@ class Adapter implements AdapterInterface
     private $connection;
     private $entryManager;
 
-    public function __construct(array $config = array())
+    public function __construct(array $config = [])
     {
         if (!\extension_loaded('ldap')) {
             throw new LdapException('The LDAP PHP extension is not enabled.');
@@ -59,7 +59,7 @@ class Adapter implements AdapterInterface
     /**
      * {@inheritdoc}
      */
-    public function createQuery($dn, $query, array $options = array())
+    public function createQuery($dn, $query, array $options = [])
     {
         return new Query($this->getConnection(), $dn, $query, $options);
     }
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Collection.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Collection.php
index 581cf153ed..fade430753 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Collection.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Collection.php
@@ -121,10 +121,10 @@ class Collection implements CollectionInterface
 
     private function cleanupAttributes(array $entry)
     {
-        $attributes = array_diff_key($entry, array_flip(range(0, $entry['count'] - 1)) + array(
+        $attributes = array_diff_key($entry, array_flip(range(0, $entry['count'] - 1)) + [
                 'count' => null,
                 'dn' => null,
-            ));
+            ]);
         array_walk($attributes, function (&$value) {
             unset($value['count']);
         });
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
index 73b127ce5e..8ba19ee731 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php
@@ -100,10 +100,10 @@ class Connection extends AbstractConnection
                 $options->setDefault('debug_level', 7);
             }
 
-            $options->setDefaults(array(
+            $options->setDefaults([
                 'protocol_version' => $parent['version'],
                 'referrals' => $parent['referrals'],
-            ));
+            ]);
         });
     }
 
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/EntryManager.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/EntryManager.php
index b8ce05e101..f80601b3ba 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/EntryManager.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/EntryManager.php
@@ -78,7 +78,7 @@ class EntryManager implements EntryManagerInterface
     {
         $con = $this->getConnectionResource();
 
-        if (!@ldap_mod_add($con, $entry->getDn(), array($attribute => $values))) {
+        if (!@ldap_mod_add($con, $entry->getDn(), [$attribute => $values])) {
             throw new LdapException(sprintf('Could not add values to entry "%s", attribute %s: %s.', $entry->getDn(), $attribute, ldap_error($con)));
         }
     }
@@ -93,7 +93,7 @@ class EntryManager implements EntryManagerInterface
     {
         $con = $this->getConnectionResource();
 
-        if (!@ldap_mod_del($con, $entry->getDn(), array($attribute => $values))) {
+        if (!@ldap_mod_del($con, $entry->getDn(), [$attribute => $values])) {
             throw new LdapException(sprintf('Could not remove values from entry "%s", attribute %s: %s.', $entry->getDn(), $attribute, ldap_error($con)));
         }
     }
@@ -130,7 +130,7 @@ class EntryManager implements EntryManagerInterface
      */
     public function applyOperations(string $dn, iterable $operations): void
     {
-        $operationsMapped = array();
+        $operationsMapped = [];
         foreach ($operations as $modification) {
             $operationsMapped[] = $modification->toArray();
         }
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
index e90ac3c37c..2147acb4d1 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/Query.php
@@ -27,7 +27,7 @@ class Query extends AbstractQuery
     /** @var resource */
     private $search;
 
-    public function __construct(Connection $connection, string $dn, string $query, array $options = array())
+    public function __construct(Connection $connection, string $dn, string $query, array $options = [])
     {
         parent::__construct($connection, $dn, $query, $options);
     }
diff --git a/src/Symfony/Component/Ldap/Adapter/ExtLdap/UpdateOperation.php b/src/Symfony/Component/Ldap/Adapter/ExtLdap/UpdateOperation.php
index 7bf3d32f37..c09b1b8e10 100644
--- a/src/Symfony/Component/Ldap/Adapter/ExtLdap/UpdateOperation.php
+++ b/src/Symfony/Component/Ldap/Adapter/ExtLdap/UpdateOperation.php
@@ -19,12 +19,12 @@ class UpdateOperation
     private $values;
     private $attribute;
 
-    private $validOperationTypes = array(
+    private $validOperationTypes = [
         LDAP_MODIFY_BATCH_ADD,
         LDAP_MODIFY_BATCH_REMOVE,
         LDAP_MODIFY_BATCH_REMOVE_ALL,
         LDAP_MODIFY_BATCH_REPLACE,
-    );
+    ];
 
     /**
      * @param int    $operationType An LDAP_MODIFY_BATCH_* constant
@@ -48,10 +48,10 @@ class UpdateOperation
 
     public function toArray(): array
     {
-        return array(
+        return [
             'attrib' => $this->attribute,
             'modtype' => $this->operationType,
             'values' => $this->values,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Ldap/Entry.php b/src/Symfony/Component/Ldap/Entry.php
index 8a71ddaa1f..8ed484d0e0 100644
--- a/src/Symfony/Component/Ldap/Entry.php
+++ b/src/Symfony/Component/Ldap/Entry.php
@@ -19,7 +19,7 @@ class Entry
     private $dn;
     private $attributes;
 
-    public function __construct(string $dn, array $attributes = array())
+    public function __construct(string $dn, array $attributes = [])
     {
         $this->dn = $dn;
         $this->attributes = $attributes;
diff --git a/src/Symfony/Component/Ldap/Ldap.php b/src/Symfony/Component/Ldap/Ldap.php
index de1ab1a249..615dbcfda3 100644
--- a/src/Symfony/Component/Ldap/Ldap.php
+++ b/src/Symfony/Component/Ldap/Ldap.php
@@ -21,9 +21,9 @@ final class Ldap implements LdapInterface
 {
     private $adapter;
 
-    private static $adapterMap = array(
+    private static $adapterMap = [
         'ext_ldap' => 'Symfony\Component\Ldap\Adapter\ExtLdap\Adapter',
-    );
+    ];
 
     public function __construct(AdapterInterface $adapter)
     {
@@ -41,7 +41,7 @@ final class Ldap implements LdapInterface
     /**
      * {@inheritdoc}
      */
-    public function query($dn, $query, array $options = array())
+    public function query($dn, $query, array $options = [])
     {
         return $this->adapter->createQuery($dn, $query, $options);
     }
@@ -70,7 +70,7 @@ final class Ldap implements LdapInterface
      *
      * @return static
      */
-    public static function create($adapter, array $config = array()): self
+    public static function create($adapter, array $config = []): self
     {
         if (!isset(self::$adapterMap[$adapter])) {
             throw new DriverNotFoundException(sprintf(
diff --git a/src/Symfony/Component/Ldap/LdapInterface.php b/src/Symfony/Component/Ldap/LdapInterface.php
index 9f24276d61..aa6b233f3d 100644
--- a/src/Symfony/Component/Ldap/LdapInterface.php
+++ b/src/Symfony/Component/Ldap/LdapInterface.php
@@ -44,7 +44,7 @@ interface LdapInterface
      *
      * @return QueryInterface
      */
-    public function query($dn, $query, array $options = array());
+    public function query($dn, $query, array $options = []);
 
     /**
      * @return EntryManagerInterface
diff --git a/src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php b/src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php
index 2ce82b219f..7072351555 100644
--- a/src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php
+++ b/src/Symfony/Component/Ldap/Tests/Adapter/ExtLdap/LdapManagerTest.php
@@ -40,12 +40,12 @@ class LdapManagerTest extends LdapTestCase
     {
         $this->executeSearchQuery(1);
 
-        $entry = new Entry('cn=Charles Sarrazin,dc=symfony,dc=com', array(
-            'sn' => array('csarrazi'),
-            'objectclass' => array(
+        $entry = new Entry('cn=Charles Sarrazin,dc=symfony,dc=com', [
+            'sn' => ['csarrazi'],
+            'objectclass' => [
                 'inetOrgPerson',
-            ),
-        ));
+            ],
+        ]);
 
         $em = $this->adapter->getEntryManager();
         $em->add($entry);
@@ -65,11 +65,11 @@ class LdapManagerTest extends LdapTestCase
         $this->executeSearchQuery(1);
 
         // The entry is missing a subject name
-        $entry = new Entry('cn=Charles Sarrazin,dc=symfony,dc=com', array(
-            'objectclass' => array(
+        $entry = new Entry('cn=Charles Sarrazin,dc=symfony,dc=com', [
+            'objectclass' => [
                 'inetOrgPerson',
-            ),
-        ));
+            ],
+        ]);
 
         $em = $this->adapter->getEntryManager();
         $em->add($entry);
@@ -202,14 +202,14 @@ class LdapManagerTest extends LdapTestCase
         $result = $this->executeSearchQuery(1);
         $entry = $result[0];
 
-        $entryManager->addAttributeValues($entry, 'mail', array('fabpot@example.org', 'fabpot2@example.org'));
+        $entryManager->addAttributeValues($entry, 'mail', ['fabpot@example.org', 'fabpot2@example.org']);
 
         $result = $this->executeSearchQuery(1);
         $newEntry = $result[0];
 
         $this->assertCount(4, $newEntry->getAttribute('mail'));
 
-        $entryManager->removeAttributeValues($newEntry, 'mail', array('fabpot@example.org', 'fabpot2@example.org'));
+        $entryManager->removeAttributeValues($newEntry, 'mail', ['fabpot@example.org', 'fabpot2@example.org']);
 
         $result = $this->executeSearchQuery(1);
         $newNewEntry = $result[0];
@@ -226,7 +226,7 @@ class LdapManagerTest extends LdapTestCase
 
         $this->expectException(LdapException::class);
 
-        $entryManager->removeAttributeValues($entry, 'mail', array('fabpot@example.org'));
+        $entryManager->removeAttributeValues($entry, 'mail', ['fabpot@example.org']);
     }
 
     public function testLdapAddAttributeValuesError()
@@ -250,7 +250,7 @@ class LdapManagerTest extends LdapTestCase
 
         $this->expectException(UpdateOperationException::class);
 
-        $entryManager->applyOperations($entry->getDn(), array(new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE_ALL, 'mail', array())));
+        $entryManager->applyOperations($entry->getDn(), [new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE_ALL, 'mail', [])]);
     }
 
     public function testLdapApplyOperationsWithWrongConstantError()
@@ -262,7 +262,7 @@ class LdapManagerTest extends LdapTestCase
 
         $this->expectException(UpdateOperationException::class);
 
-        $entryManager->applyOperations($entry->getDn(), array(new UpdateOperation(512, 'mail', array())));
+        $entryManager->applyOperations($entry->getDn(), [new UpdateOperation(512, 'mail', [])]);
     }
 
     public function testApplyOperationsAddRemoveAttributeValues()
@@ -272,20 +272,20 @@ class LdapManagerTest extends LdapTestCase
         $result = $this->executeSearchQuery(1);
         $entry = $result[0];
 
-        $entryManager->applyOperations($entry->getDn(), array(
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot@example.org', 'fabpot2@example.org')),
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot3@example.org', 'fabpot4@example.org')),
-        ));
+        $entryManager->applyOperations($entry->getDn(), [
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot@example.org', 'fabpot2@example.org']),
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot3@example.org', 'fabpot4@example.org']),
+        ]);
 
         $result = $this->executeSearchQuery(1);
         $newEntry = $result[0];
 
         $this->assertCount(6, $newEntry->getAttribute('mail'));
 
-        $entryManager->applyOperations($entry->getDn(), array(
-            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', array('fabpot@example.org', 'fabpot2@example.org')),
-            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', array('fabpot3@example.org', 'fabpot4@example.org')),
-        ));
+        $entryManager->applyOperations($entry->getDn(), [
+            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', ['fabpot@example.org', 'fabpot2@example.org']),
+            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', ['fabpot3@example.org', 'fabpot4@example.org']),
+        ]);
 
         $result = $this->executeSearchQuery(1);
         $newNewEntry = $result[0];
@@ -295,15 +295,15 @@ class LdapManagerTest extends LdapTestCase
 
     public function testUpdateOperationsWithIterator()
     {
-        $iteratorAdd = new \ArrayIterator(array(
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot@example.org', 'fabpot2@example.org')),
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot3@example.org', 'fabpot4@example.org')),
-        ));
+        $iteratorAdd = new \ArrayIterator([
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot@example.org', 'fabpot2@example.org']),
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot3@example.org', 'fabpot4@example.org']),
+        ]);
 
-        $iteratorRemove = new \ArrayIterator(array(
-            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', array('fabpot@example.org', 'fabpot2@example.org')),
-            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', array('fabpot3@example.org', 'fabpot4@example.org')),
-        ));
+        $iteratorRemove = new \ArrayIterator([
+            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', ['fabpot@example.org', 'fabpot2@example.org']),
+            new UpdateOperation(LDAP_MODIFY_BATCH_REMOVE, 'mail', ['fabpot3@example.org', 'fabpot4@example.org']),
+        ]);
 
         $entryManager = $this->adapter->getEntryManager();
 
@@ -327,10 +327,10 @@ class LdapManagerTest extends LdapTestCase
 
     public function testUpdateOperationsThrowsExceptionWhenAddedDuplicatedValue()
     {
-        $duplicateIterator = new \ArrayIterator(array(
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot@example.org')),
-            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', array('fabpot@example.org')),
-        ));
+        $duplicateIterator = new \ArrayIterator([
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot@example.org']),
+            new UpdateOperation(LDAP_MODIFY_BATCH_ADD, 'mail', ['fabpot@example.org']),
+        ]);
 
         $entryManager = $this->adapter->getEntryManager();
 
diff --git a/src/Symfony/Component/Ldap/Tests/LdapTest.php b/src/Symfony/Component/Ldap/Tests/LdapTest.php
index 139bb6952e..2cfb52759c 100644
--- a/src/Symfony/Component/Ldap/Tests/LdapTest.php
+++ b/src/Symfony/Component/Ldap/Tests/LdapTest.php
@@ -62,9 +62,9 @@ class LdapTest extends TestCase
         $this->adapter
             ->expects($this->once())
             ->method('createQuery')
-            ->with('foo', 'bar', array('baz'))
+            ->with('foo', 'bar', ['baz'])
         ;
-        $this->ldap->query('foo', 'bar', array('baz'));
+        $this->ldap->query('foo', 'bar', ['baz']);
     }
 
     /**
diff --git a/src/Symfony/Component/Ldap/Tests/LdapTestCase.php b/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
index 33afd6d22d..2e5fa9a34b 100644
--- a/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
+++ b/src/Symfony/Component/Ldap/Tests/LdapTestCase.php
@@ -8,9 +8,9 @@ class LdapTestCase extends TestCase
 {
     protected function getLdapConfig()
     {
-        return array(
+        return [
             'host' => getenv('LDAP_HOST'),
             'port' => getenv('LDAP_PORT'),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Lock/Key.php b/src/Symfony/Component/Lock/Key.php
index 7fddafe9e2..e20fbd9c80 100644
--- a/src/Symfony/Component/Lock/Key.php
+++ b/src/Symfony/Component/Lock/Key.php
@@ -20,7 +20,7 @@ final class Key
 {
     private $resource;
     private $expiringTime;
-    private $state = array();
+    private $state = [];
 
     public function __construct(string $resource)
     {
diff --git a/src/Symfony/Component/Lock/Lock.php b/src/Symfony/Component/Lock/Lock.php
index 03ac44cd12..97117a8204 100644
--- a/src/Symfony/Component/Lock/Lock.php
+++ b/src/Symfony/Component/Lock/Lock.php
@@ -76,7 +76,7 @@ final class Lock implements LockInterface, LoggerAwareInterface
             }
 
             $this->dirty = true;
-            $this->logger->info('Successfully acquired the "{resource}" lock.', array('resource' => $this->key));
+            $this->logger->info('Successfully acquired the "{resource}" lock.', ['resource' => $this->key]);
 
             if ($this->ttl) {
                 $this->refresh();
@@ -89,7 +89,7 @@ final class Lock implements LockInterface, LoggerAwareInterface
             return true;
         } catch (LockConflictedException $e) {
             $this->dirty = false;
-            $this->logger->notice('Failed to acquire the "{resource}" lock. Someone else already acquired the lock.', array('resource' => $this->key));
+            $this->logger->notice('Failed to acquire the "{resource}" lock. Someone else already acquired the lock.', ['resource' => $this->key]);
 
             if ($blocking) {
                 throw $e;
@@ -97,7 +97,7 @@ final class Lock implements LockInterface, LoggerAwareInterface
 
             return false;
         } catch (\Exception $e) {
-            $this->logger->notice('Failed to acquire the "{resource}" lock.', array('resource' => $this->key, 'exception' => $e));
+            $this->logger->notice('Failed to acquire the "{resource}" lock.', ['resource' => $this->key, 'exception' => $e]);
             throw new LockAcquiringException(sprintf('Failed to acquire the "%s" lock.', $this->key), 0, $e);
         }
     }
@@ -123,13 +123,13 @@ final class Lock implements LockInterface, LoggerAwareInterface
                 throw new LockExpiredException(sprintf('Failed to put off the expiration of the "%s" lock within the specified time.', $this->key));
             }
 
-            $this->logger->info('Expiration defined for "{resource}" lock for "{ttl}" seconds.', array('resource' => $this->key, 'ttl' => $ttl));
+            $this->logger->info('Expiration defined for "{resource}" lock for "{ttl}" seconds.', ['resource' => $this->key, 'ttl' => $ttl]);
         } catch (LockConflictedException $e) {
             $this->dirty = false;
-            $this->logger->notice('Failed to define an expiration for the "{resource}" lock, someone else acquired the lock.', array('resource' => $this->key));
+            $this->logger->notice('Failed to define an expiration for the "{resource}" lock, someone else acquired the lock.', ['resource' => $this->key]);
             throw $e;
         } catch (\Exception $e) {
-            $this->logger->notice('Failed to define an expiration for the "{resource}" lock.', array('resource' => $this->key, 'exception' => $e));
+            $this->logger->notice('Failed to define an expiration for the "{resource}" lock.', ['resource' => $this->key, 'exception' => $e]);
             throw new LockAcquiringException(sprintf('Failed to define an expiration for the "%s" lock.', $this->key), 0, $e);
         }
     }
@@ -161,7 +161,7 @@ final class Lock implements LockInterface, LoggerAwareInterface
                 throw new LockReleasingException(sprintf('Failed to release the "%s" lock, the resource is still locked.', $this->key));
             }
         } catch (LockReleasingException $e) {
-            $this->logger->notice('Failed to release the "{resource}" lock.', array('resource' => $this->key));
+            $this->logger->notice('Failed to release the "{resource}" lock.', ['resource' => $this->key]);
             throw $e;
         }
     }
diff --git a/src/Symfony/Component/Lock/Store/CombinedStore.php b/src/Symfony/Component/Lock/Store/CombinedStore.php
index b0ca2c1454..38f3f35e75 100644
--- a/src/Symfony/Component/Lock/Store/CombinedStore.php
+++ b/src/Symfony/Component/Lock/Store/CombinedStore.php
@@ -69,7 +69,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
                 $store->save($key);
                 ++$successCount;
             } catch (\Exception $e) {
-                $this->logger->warning('One store failed to save the "{resource}" lock.', array('resource' => $key, 'store' => $store, 'exception' => $e));
+                $this->logger->warning('One store failed to save the "{resource}" lock.', ['resource' => $key, 'store' => $store, 'exception' => $e]);
                 ++$failureCount;
             }
 
@@ -82,7 +82,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
             return;
         }
 
-        $this->logger->warning('Failed to store the "{resource}" lock. Quorum has not been met.', array('resource' => $key, 'success' => $successCount, 'failure' => $failureCount));
+        $this->logger->warning('Failed to store the "{resource}" lock. Quorum has not been met.', ['resource' => $key, 'success' => $successCount, 'failure' => $failureCount]);
 
         // clean up potential locks
         $this->delete($key);
@@ -108,7 +108,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
         foreach ($this->stores as $store) {
             try {
                 if (0.0 >= $adjustedTtl = $expireAt - microtime(true)) {
-                    $this->logger->warning('Stores took to long to put off the expiration of the "{resource}" lock.', array('resource' => $key, 'store' => $store, 'ttl' => $ttl));
+                    $this->logger->warning('Stores took to long to put off the expiration of the "{resource}" lock.', ['resource' => $key, 'store' => $store, 'ttl' => $ttl]);
                     $key->reduceLifetime(0);
                     break;
                 }
@@ -116,7 +116,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
                 $store->putOffExpiration($key, $adjustedTtl);
                 ++$successCount;
             } catch (\Exception $e) {
-                $this->logger->warning('One store failed to put off the expiration of the "{resource}" lock.', array('resource' => $key, 'store' => $store, 'exception' => $e));
+                $this->logger->warning('One store failed to put off the expiration of the "{resource}" lock.', ['resource' => $key, 'store' => $store, 'exception' => $e]);
                 ++$failureCount;
             }
 
@@ -133,7 +133,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
             return;
         }
 
-        $this->logger->warning('Failed to define the expiration for the "{resource}" lock. Quorum has not been met.', array('resource' => $key, 'success' => $successCount, 'failure' => $failureCount));
+        $this->logger->warning('Failed to define the expiration for the "{resource}" lock. Quorum has not been met.', ['resource' => $key, 'success' => $successCount, 'failure' => $failureCount]);
 
         // clean up potential locks
         $this->delete($key);
@@ -150,7 +150,7 @@ class CombinedStore implements StoreInterface, LoggerAwareInterface
             try {
                 $store->delete($key);
             } catch (\Exception $e) {
-                $this->logger->notice('One store failed to delete the "{resource}" lock.', array('resource' => $key, 'store' => $store, 'exception' => $e));
+                $this->logger->notice('One store failed to delete the "{resource}" lock.', ['resource' => $key, 'store' => $store, 'exception' => $e]);
             }
         }
     }
diff --git a/src/Symfony/Component/Lock/Store/MemcachedStore.php b/src/Symfony/Component/Lock/Store/MemcachedStore.php
index c9200af199..92f84450a9 100644
--- a/src/Symfony/Component/Lock/Store/MemcachedStore.php
+++ b/src/Symfony/Component/Lock/Store/MemcachedStore.php
@@ -166,15 +166,15 @@ class MemcachedStore implements StoreInterface
         if ($this->useExtendedReturn) {
             $extendedReturn = $this->memcached->get((string) $key, null, \Memcached::GET_EXTENDED);
             if (\Memcached::GET_ERROR_RETURN_VALUE === $extendedReturn) {
-                return array($extendedReturn, 0.0);
+                return [$extendedReturn, 0.0];
             }
 
-            return array($extendedReturn['value'], $extendedReturn['cas']);
+            return [$extendedReturn['value'], $extendedReturn['cas']];
         }
 
         $cas = 0.0;
         $value = $this->memcached->get((string) $key, null, $cas);
 
-        return array($value, $cas);
+        return [$value, $cas];
     }
 }
diff --git a/src/Symfony/Component/Lock/Store/PdoStore.php b/src/Symfony/Component/Lock/Store/PdoStore.php
index 710eca668f..693b798a7d 100644
--- a/src/Symfony/Component/Lock/Store/PdoStore.php
+++ b/src/Symfony/Component/Lock/Store/PdoStore.php
@@ -45,7 +45,7 @@ class PdoStore implements StoreInterface
     private $expirationCol = 'key_expiration';
     private $username = '';
     private $password = '';
-    private $connectionOptions = array();
+    private $connectionOptions = [];
     private $gcProbability;
     private $initialTtl;
 
@@ -61,7 +61,7 @@ class PdoStore implements StoreInterface
      *  * db_expiration_col: The column where to store the expiration [default: key_expiration]
      *  * db_username: The username when lazy-connect [default: '']
      *  * db_password: The password when lazy-connect [default: '']
-     *  * db_connection_options: An array of driver-specific connection options [default: array()]
+     *  * db_connection_options: An array of driver-specific connection options [default: []]
      *
      * @param \PDO|Connection|string $connOrDsn     A \PDO or Connection instance or DSN string or null
      * @param array                  $options       An associative array of options
@@ -73,7 +73,7 @@ class PdoStore implements StoreInterface
      * @throws InvalidArgumentException When namespace contains invalid characters
      * @throws InvalidArgumentException When the initial ttl is not valid
      */
-    public function __construct($connOrDsn, array $options = array(), float $gcProbability = 0.01, int $initialTtl = 300)
+    public function __construct($connOrDsn, array $options = [], float $gcProbability = 0.01, int $initialTtl = 300)
     {
         if ($gcProbability < 0 || $gcProbability > 1) {
             throw new InvalidArgumentException(sprintf('"%s" requires gcProbability between 0 and 1, "%f" given.', __METHOD__, $gcProbability));
@@ -258,10 +258,10 @@ class PdoStore implements StoreInterface
         if ($conn instanceof Connection) {
             $schema = new Schema();
             $table = $schema->createTable($this->table);
-            $table->addColumn($this->idCol, 'string', array('length' => 64));
-            $table->addColumn($this->tokenCol, 'string', array('length' => 44));
-            $table->addColumn($this->expirationCol, 'integer', array('unsigned' => true));
-            $table->setPrimaryKey(array($this->idCol));
+            $table->addColumn($this->idCol, 'string', ['length' => 64]);
+            $table->addColumn($this->tokenCol, 'string', ['length' => 44]);
+            $table->addColumn($this->expirationCol, 'integer', ['unsigned' => true]);
+            $table->setPrimaryKey([$this->idCol]);
 
             foreach ($schema->toSql($conn->getDatabasePlatform()) as $sql) {
                 $conn->exec($sql);
diff --git a/src/Symfony/Component/Lock/Store/RedisStore.php b/src/Symfony/Component/Lock/Store/RedisStore.php
index 08965dbfb1..d07a2ce27f 100644
--- a/src/Symfony/Component/Lock/Store/RedisStore.php
+++ b/src/Symfony/Component/Lock/Store/RedisStore.php
@@ -63,7 +63,7 @@ class RedisStore implements StoreInterface
         ';
 
         $key->reduceLifetime($this->initialTtl);
-        if (!$this->evaluate($script, (string) $key, array($this->getUniqueToken($key), (int) ceil($this->initialTtl * 1000)))) {
+        if (!$this->evaluate($script, (string) $key, [$this->getUniqueToken($key), (int) ceil($this->initialTtl * 1000)])) {
             throw new LockConflictedException();
         }
 
@@ -91,7 +91,7 @@ class RedisStore implements StoreInterface
         ';
 
         $key->reduceLifetime($ttl);
-        if (!$this->evaluate($script, (string) $key, array($this->getUniqueToken($key), (int) ceil($ttl * 1000)))) {
+        if (!$this->evaluate($script, (string) $key, [$this->getUniqueToken($key), (int) ceil($ttl * 1000)])) {
             throw new LockConflictedException();
         }
 
@@ -113,7 +113,7 @@ class RedisStore implements StoreInterface
             end
         ';
 
-        $this->evaluate($script, (string) $key, array($this->getUniqueToken($key)));
+        $this->evaluate($script, (string) $key, [$this->getUniqueToken($key)]);
     }
 
     /**
@@ -137,15 +137,15 @@ class RedisStore implements StoreInterface
             $this->redis instanceof RedisProxy ||
             $this->redis instanceof RedisClusterProxy
         ) {
-            return $this->redis->eval($script, array_merge(array($resource), $args), 1);
+            return $this->redis->eval($script, array_merge([$resource], $args), 1);
         }
 
         if ($this->redis instanceof \RedisArray) {
-            return $this->redis->_instance($this->redis->_target($resource))->eval($script, array_merge(array($resource), $args), 1);
+            return $this->redis->_instance($this->redis->_target($resource))->eval($script, array_merge([$resource], $args), 1);
         }
 
         if ($this->redis instanceof \Predis\Client) {
-            return $this->redis->eval(...array_merge(array($script, 1, $resource), $args));
+            return $this->redis->eval(...array_merge([$script, 1, $resource], $args));
         }
 
         throw new InvalidArgumentException(sprintf('%s() expects being initialized with a Redis, RedisArray, RedisCluster or Predis\Client, %s given', __METHOD__, \is_object($this->redis) ? \get_class($this->redis) : \gettype($this->redis)));
diff --git a/src/Symfony/Component/Lock/Store/RetryTillSaveStore.php b/src/Symfony/Component/Lock/Store/RetryTillSaveStore.php
index bf69a75f97..32055ecffe 100644
--- a/src/Symfony/Component/Lock/Store/RetryTillSaveStore.php
+++ b/src/Symfony/Component/Lock/Store/RetryTillSaveStore.php
@@ -71,7 +71,7 @@ class RetryTillSaveStore implements StoreInterface, LoggerAwareInterface
             }
         } while (++$retry < $this->retryCount);
 
-        $this->logger->warning('Failed to store the "{resource}" lock. Abort after {retry} retry.', array('resource' => $key, 'retry' => $retry));
+        $this->logger->warning('Failed to store the "{resource}" lock. Abort after {retry} retry.', ['resource' => $key, 'retry' => $retry]);
 
         throw new LockConflictedException();
     }
diff --git a/src/Symfony/Component/Lock/Store/ZookeeperStore.php b/src/Symfony/Component/Lock/Store/ZookeeperStore.php
index 2304dd47a0..c755ce1a1c 100644
--- a/src/Symfony/Component/Lock/Store/ZookeeperStore.php
+++ b/src/Symfony/Component/Lock/Store/ZookeeperStore.php
@@ -106,7 +106,7 @@ class ZookeeperStore implements StoreInterface
     private function createNewLock(string $node, string $value)
     {
         // Default Node Permissions
-        $acl = array(array('perms' => \Zookeeper::PERM_ALL, 'scheme' => 'world', 'id' => 'anyone'));
+        $acl = [['perms' => \Zookeeper::PERM_ALL, 'scheme' => 'world', 'id' => 'anyone']];
         // This ensures that the nodes are deleted when the client session to zookeeper server ends.
         $type = \Zookeeper::EPHEMERAL;
 
@@ -128,7 +128,7 @@ class ZookeeperStore implements StoreInterface
         $resource = (string) $key;
 
         if (false !== \strpos($resource, '/')) {
-            $resource = \strtr($resource, array('/' => '-')).'-'.sha1($resource);
+            $resource = \strtr($resource, ['/' => '-']).'-'.sha1($resource);
         }
 
         if ('' === $resource) {
diff --git a/src/Symfony/Component/Lock/Tests/LockTest.php b/src/Symfony/Component/Lock/Tests/LockTest.php
index 270b71dfb4..a5e905a80f 100644
--- a/src/Symfony/Component/Lock/Tests/LockTest.php
+++ b/src/Symfony/Component/Lock/Tests/LockTest.php
@@ -154,7 +154,7 @@ class LockTest extends TestCase
 
         $store
             ->method('exists')
-            ->willReturnOnConsecutiveCalls(array(true, false))
+            ->willReturnOnConsecutiveCalls([true, false])
         ;
         $store
             ->expects($this->once())
@@ -173,7 +173,7 @@ class LockTest extends TestCase
 
         $store
             ->method('exists')
-            ->willReturnOnConsecutiveCalls(array(true, false))
+            ->willReturnOnConsecutiveCalls([true, false])
         ;
         $store
             ->expects($this->never())
@@ -243,7 +243,7 @@ class LockTest extends TestCase
 
         $logger->expects($this->atLeastOnce())
             ->method('notice')
-            ->with('Failed to release the "{resource}" lock.', array('resource' => $key));
+            ->with('Failed to release the "{resource}" lock.', ['resource' => $key]);
 
         $store
             ->expects($this->once())
@@ -280,12 +280,12 @@ class LockTest extends TestCase
 
     public function provideExpiredDates()
     {
-        yield array(array(-0.1), true);
-        yield array(array(0.1, -0.1), true);
-        yield array(array(-0.1, 0.1), true);
+        yield [[-0.1], true];
+        yield [[0.1, -0.1], true];
+        yield [[-0.1, 0.1], true];
 
-        yield array(array(), false);
-        yield array(array(0.1), false);
-        yield array(array(-0.1, null), false);
+        yield [[], false];
+        yield [[0.1], false];
+        yield [[-0.1, null], false];
     }
 }
diff --git a/src/Symfony/Component/Lock/Tests/Store/BlockingStoreTestTrait.php b/src/Symfony/Component/Lock/Tests/Store/BlockingStoreTestTrait.php
index 0d91175c0c..21f1245e7e 100644
--- a/src/Symfony/Component/Lock/Tests/Store/BlockingStoreTestTrait.php
+++ b/src/Symfony/Component/Lock/Tests/Store/BlockingStoreTestTrait.php
@@ -45,11 +45,11 @@ trait BlockingStoreTestTrait
         $parentPID = posix_getpid();
 
         // Block SIGHUP signal
-        pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
+        pcntl_sigprocmask(SIG_BLOCK, [SIGHUP]);
 
         if ($childPID = pcntl_fork()) {
             // Wait the start of the child
-            pcntl_sigwaitinfo(array(SIGHUP), $info);
+            pcntl_sigwaitinfo([SIGHUP], $info);
 
             $store = $this->getStore();
             try {
@@ -72,7 +72,7 @@ trait BlockingStoreTestTrait
             $this->assertSame(0, pcntl_wexitstatus($status1), 'The child process couldn\'t lock the resource');
         } else {
             // Block SIGHUP signal
-            pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
+            pcntl_sigprocmask(SIG_BLOCK, [SIGHUP]);
 
             $store = $this->getStore();
             try {
@@ -81,7 +81,7 @@ trait BlockingStoreTestTrait
                 posix_kill($parentPID, SIGHUP);
 
                 // Wait for the parent to be ready
-                pcntl_sigwaitinfo(array(SIGHUP), $info);
+                pcntl_sigwaitinfo([SIGHUP], $info);
 
                 // Wait ClockDelay to let parent assert to finish
                 usleep($clockDelay);
diff --git a/src/Symfony/Component/Lock/Tests/Store/CombinedStoreTest.php b/src/Symfony/Component/Lock/Tests/Store/CombinedStoreTest.php
index f2c55b056b..bcfc40b1bc 100644
--- a/src/Symfony/Component/Lock/Tests/Store/CombinedStoreTest.php
+++ b/src/Symfony/Component/Lock/Tests/Store/CombinedStoreTest.php
@@ -46,7 +46,7 @@ class CombinedStoreTest extends AbstractStoreTest
             self::markTestSkipped($e->getMessage());
         }
 
-        return new CombinedStore(array(new RedisStore($redis)), new UnanimousStrategy());
+        return new CombinedStore([new RedisStore($redis)], new UnanimousStrategy());
     }
 
     /** @var \PHPUnit_Framework_MockObject_MockObject */
@@ -64,7 +64,7 @@ class CombinedStoreTest extends AbstractStoreTest
         $this->store1 = $this->getMockBuilder(StoreInterface::class)->getMock();
         $this->store2 = $this->getMockBuilder(StoreInterface::class)->getMock();
 
-        $this->store = new CombinedStore(array($this->store1, $this->store2), $this->strategy);
+        $this->store = new CombinedStore([$this->store1, $this->store2], $this->strategy);
     }
 
     /**
@@ -269,7 +269,7 @@ class CombinedStoreTest extends AbstractStoreTest
         $store1 = $this->getMockBuilder(StoreInterface::class)->getMock();
         $store2 = $this->getMockBuilder(StoreInterface::class)->getMock();
 
-        $store = new CombinedStore(array($store1, $store2), $this->strategy);
+        $store = new CombinedStore([$store1, $store2], $this->strategy);
 
         $key = new Key(uniqid(__METHOD__, true));
         $ttl = random_int(1, 10);
diff --git a/src/Symfony/Component/Lock/Tests/Store/PdoDbalStoreTest.php b/src/Symfony/Component/Lock/Tests/Store/PdoDbalStoreTest.php
index e72fbcf76b..0dd32c0847 100644
--- a/src/Symfony/Component/Lock/Tests/Store/PdoDbalStoreTest.php
+++ b/src/Symfony/Component/Lock/Tests/Store/PdoDbalStoreTest.php
@@ -29,7 +29,7 @@ class PdoDbalStoreTest extends AbstractStoreTest
     {
         self::$dbFile = tempnam(sys_get_temp_dir(), 'sf_sqlite_lock');
 
-        $store = new PdoStore(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)));
+        $store = new PdoStore(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]));
         $store->createTable();
     }
 
@@ -51,7 +51,7 @@ class PdoDbalStoreTest extends AbstractStoreTest
      */
     public function getStore()
     {
-        return new PdoStore(DriverManager::getConnection(array('driver' => 'pdo_sqlite', 'path' => self::$dbFile)));
+        return new PdoStore(DriverManager::getConnection(['driver' => 'pdo_sqlite', 'path' => self::$dbFile]));
     }
 
     public function testAbortAfterExpiration()
diff --git a/src/Symfony/Component/Lock/Tests/Store/RedisArrayStoreTest.php b/src/Symfony/Component/Lock/Tests/Store/RedisArrayStoreTest.php
index 180da4618d..7d915615a7 100644
--- a/src/Symfony/Component/Lock/Tests/Store/RedisArrayStoreTest.php
+++ b/src/Symfony/Component/Lock/Tests/Store/RedisArrayStoreTest.php
@@ -31,7 +31,7 @@ class RedisArrayStoreTest extends AbstractRedisStoreTest
 
     protected function getRedisConnection()
     {
-        $redis = new \RedisArray(array(getenv('REDIS_HOST')));
+        $redis = new \RedisArray([getenv('REDIS_HOST')]);
 
         return $redis;
     }
diff --git a/src/Symfony/Component/Lock/Tests/Store/ZookeeperStoreTest.php b/src/Symfony/Component/Lock/Tests/Store/ZookeeperStoreTest.php
index 73be28bcca..0ba6d73b9f 100644
--- a/src/Symfony/Component/Lock/Tests/Store/ZookeeperStoreTest.php
+++ b/src/Symfony/Component/Lock/Tests/Store/ZookeeperStoreTest.php
@@ -26,7 +26,7 @@ class ZookeeperStoreTest extends AbstractStoreTest
     {
         $zookeeper_server = getenv('ZOOKEEPER_HOST').':2181';
 
-        $zookeeper = new \Zookeeper(implode(',', array($zookeeper_server)));
+        $zookeeper = new \Zookeeper(implode(',', [$zookeeper_server]));
 
         return StoreFactory::createStore($zookeeper);
     }
diff --git a/src/Symfony/Component/Lock/Tests/Strategy/ConsensusStrategyTest.php b/src/Symfony/Component/Lock/Tests/Strategy/ConsensusStrategyTest.php
index b8c09dfb31..8034cfe7cf 100644
--- a/src/Symfony/Component/Lock/Tests/Strategy/ConsensusStrategyTest.php
+++ b/src/Symfony/Component/Lock/Tests/Strategy/ConsensusStrategyTest.php
@@ -30,45 +30,45 @@ class ConsensusStrategyTest extends TestCase
     public function provideMetResults()
     {
         // success, failure, total, isMet
-        yield array(3, 0, 3, true);
-        yield array(2, 1, 3, true);
-        yield array(2, 0, 3, true);
-        yield array(1, 2, 3, false);
-        yield array(1, 1, 3, false);
-        yield array(1, 0, 3, false);
-        yield array(0, 3, 3, false);
-        yield array(0, 2, 3, false);
-        yield array(0, 1, 3, false);
-        yield array(0, 0, 3, false);
+        yield [3, 0, 3, true];
+        yield [2, 1, 3, true];
+        yield [2, 0, 3, true];
+        yield [1, 2, 3, false];
+        yield [1, 1, 3, false];
+        yield [1, 0, 3, false];
+        yield [0, 3, 3, false];
+        yield [0, 2, 3, false];
+        yield [0, 1, 3, false];
+        yield [0, 0, 3, false];
 
-        yield array(2, 0, 2, true);
-        yield array(1, 1, 2, false);
-        yield array(1, 0, 2, false);
-        yield array(0, 2, 2, false);
-        yield array(0, 1, 2, false);
-        yield array(0, 0, 2, false);
+        yield [2, 0, 2, true];
+        yield [1, 1, 2, false];
+        yield [1, 0, 2, false];
+        yield [0, 2, 2, false];
+        yield [0, 1, 2, false];
+        yield [0, 0, 2, false];
     }
 
     public function provideIndeterminate()
     {
         // success, failure, total, canBeMet
-        yield array(3, 0, 3, true);
-        yield array(2, 1, 3, true);
-        yield array(2, 0, 3, true);
-        yield array(1, 2, 3, false);
-        yield array(1, 1, 3, true);
-        yield array(1, 0, 3, true);
-        yield array(0, 3, 3, false);
-        yield array(0, 2, 3, false);
-        yield array(0, 1, 3, true);
-        yield array(0, 0, 3, true);
+        yield [3, 0, 3, true];
+        yield [2, 1, 3, true];
+        yield [2, 0, 3, true];
+        yield [1, 2, 3, false];
+        yield [1, 1, 3, true];
+        yield [1, 0, 3, true];
+        yield [0, 3, 3, false];
+        yield [0, 2, 3, false];
+        yield [0, 1, 3, true];
+        yield [0, 0, 3, true];
 
-        yield array(2, 0, 2, true);
-        yield array(1, 1, 2, false);
-        yield array(1, 0, 2, true);
-        yield array(0, 2, 2, false);
-        yield array(0, 1, 2, false);
-        yield array(0, 0, 2, true);
+        yield [2, 0, 2, true];
+        yield [1, 1, 2, false];
+        yield [1, 0, 2, true];
+        yield [0, 2, 2, false];
+        yield [0, 1, 2, false];
+        yield [0, 0, 2, true];
     }
 
     /**
diff --git a/src/Symfony/Component/Lock/Tests/Strategy/UnanimousStrategyTest.php b/src/Symfony/Component/Lock/Tests/Strategy/UnanimousStrategyTest.php
index 4e63e6b4e2..a07b42ddf5 100644
--- a/src/Symfony/Component/Lock/Tests/Strategy/UnanimousStrategyTest.php
+++ b/src/Symfony/Component/Lock/Tests/Strategy/UnanimousStrategyTest.php
@@ -30,45 +30,45 @@ class UnanimousStrategyTest extends TestCase
     public function provideMetResults()
     {
         // success, failure, total, isMet
-        yield array(3, 0, 3, true);
-        yield array(2, 1, 3, false);
-        yield array(2, 0, 3, false);
-        yield array(1, 2, 3, false);
-        yield array(1, 1, 3, false);
-        yield array(1, 0, 3, false);
-        yield array(0, 3, 3, false);
-        yield array(0, 2, 3, false);
-        yield array(0, 1, 3, false);
-        yield array(0, 0, 3, false);
+        yield [3, 0, 3, true];
+        yield [2, 1, 3, false];
+        yield [2, 0, 3, false];
+        yield [1, 2, 3, false];
+        yield [1, 1, 3, false];
+        yield [1, 0, 3, false];
+        yield [0, 3, 3, false];
+        yield [0, 2, 3, false];
+        yield [0, 1, 3, false];
+        yield [0, 0, 3, false];
 
-        yield array(2, 0, 2, true);
-        yield array(1, 1, 2, false);
-        yield array(1, 0, 2, false);
-        yield array(0, 2, 2, false);
-        yield array(0, 1, 2, false);
-        yield array(0, 0, 2, false);
+        yield [2, 0, 2, true];
+        yield [1, 1, 2, false];
+        yield [1, 0, 2, false];
+        yield [0, 2, 2, false];
+        yield [0, 1, 2, false];
+        yield [0, 0, 2, false];
     }
 
     public function provideIndeterminate()
     {
         // success, failure, total, canBeMet
-        yield array(3, 0, 3, true);
-        yield array(2, 1, 3, false);
-        yield array(2, 0, 3, true);
-        yield array(1, 2, 3, false);
-        yield array(1, 1, 3, false);
-        yield array(1, 0, 3, true);
-        yield array(0, 3, 3, false);
-        yield array(0, 2, 3, false);
-        yield array(0, 1, 3, false);
-        yield array(0, 0, 3, true);
+        yield [3, 0, 3, true];
+        yield [2, 1, 3, false];
+        yield [2, 0, 3, true];
+        yield [1, 2, 3, false];
+        yield [1, 1, 3, false];
+        yield [1, 0, 3, true];
+        yield [0, 3, 3, false];
+        yield [0, 2, 3, false];
+        yield [0, 1, 3, false];
+        yield [0, 0, 3, true];
 
-        yield array(2, 0, 2, true);
-        yield array(1, 1, 2, false);
-        yield array(1, 0, 2, true);
-        yield array(0, 2, 2, false);
-        yield array(0, 1, 2, false);
-        yield array(0, 0, 2, true);
+        yield [2, 0, 2, true];
+        yield [1, 1, 2, false];
+        yield [1, 0, 2, true];
+        yield [0, 2, 2, false];
+        yield [0, 1, 2, false];
+        yield [0, 0, 2, true];
     }
 
     /**
diff --git a/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php b/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
index 83b834c593..c455dbafbb 100644
--- a/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
+++ b/src/Symfony/Component/Messenger/Command/ConsumeMessagesCommand.php
@@ -40,7 +40,7 @@ class ConsumeMessagesCommand extends Command
     private $receiverNames;
     private $busNames;
 
-    public function __construct(ContainerInterface $busLocator, ContainerInterface $receiverLocator, LoggerInterface $logger = null, array $receiverNames = array(), array $busNames = array())
+    public function __construct(ContainerInterface $busLocator, ContainerInterface $receiverLocator, LoggerInterface $logger = null, array $receiverNames = [], array $busNames = [])
     {
         $this->busLocator = $busLocator;
         $this->receiverLocator = $receiverLocator;
@@ -60,13 +60,13 @@ class ConsumeMessagesCommand extends Command
         $defaultBusName = 1 === \count($this->busNames) ? current($this->busNames) : null;
 
         $this
-            ->setDefinition(array(
+            ->setDefinition([
                 new InputArgument('receiver', $defaultReceiverName ? InputArgument::OPTIONAL : InputArgument::REQUIRED, 'Name of the receiver', $defaultReceiverName),
                 new InputOption('limit', 'l', InputOption::VALUE_REQUIRED, 'Limit the number of received messages'),
                 new InputOption('memory-limit', 'm', InputOption::VALUE_REQUIRED, 'The memory limit the worker can consume'),
                 new InputOption('time-limit', 't', InputOption::VALUE_REQUIRED, 'The time limit in seconds the worker can run'),
                 new InputOption('bus', 'b', InputOption::VALUE_REQUIRED, 'Name of the bus to which received messages should be dispatched', $defaultBusName),
-            ))
+            ])
             ->setDescription('Consumes messages')
             ->setHelp(<<<'EOF'
 The <info>%command.name%</info> command consumes messages and dispatches them to the message bus.
@@ -186,7 +186,7 @@ EOF
 
     private function findAlternatives($name, array $collection)
     {
-        $alternatives = array();
+        $alternatives = [];
         foreach ($collection as $item) {
             $lev = levenshtein($name, $item);
             if ($lev <= \strlen($name) / 3 || false !== strpos($item, $name)) {
diff --git a/src/Symfony/Component/Messenger/Command/DebugCommand.php b/src/Symfony/Component/Messenger/Command/DebugCommand.php
index 4abfa03e17..b0aba38ea4 100644
--- a/src/Symfony/Component/Messenger/Command/DebugCommand.php
+++ b/src/Symfony/Component/Messenger/Command/DebugCommand.php
@@ -74,24 +74,24 @@ EOF
             if (!isset($mapping[$bus])) {
                 throw new RuntimeException(sprintf('Bus "%s" does not exist. Known buses are %s.', $bus, implode(', ', array_keys($this->mapping))));
             }
-            $mapping = array($bus => $mapping[$bus]);
+            $mapping = [$bus => $mapping[$bus]];
         }
 
         foreach ($mapping as $bus => $handlersByMessage) {
             $io->section($bus);
 
-            $tableRows = array();
+            $tableRows = [];
             foreach ($handlersByMessage as $message => $handlers) {
-                $tableRows[] = array(sprintf('<fg=cyan>%s</fg=cyan>', $message));
+                $tableRows[] = [sprintf('<fg=cyan>%s</fg=cyan>', $message)];
                 foreach ($handlers as $handler) {
-                    $tableRows[] = array(sprintf('    handled by <info>%s</>', $handler));
+                    $tableRows[] = [sprintf('    handled by <info>%s</>', $handler)];
                 }
             }
 
             if ($tableRows) {
                 $io->text('The following messages can be dispatched:');
                 $io->newLine();
-                $io->table(array(), $tableRows);
+                $io->table([], $tableRows);
             } else {
                 $io->warning(sprintf('No handled message found in bus "%s".', $bus));
             }
diff --git a/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php b/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
index d36c70f4ef..5d33f735b2 100644
--- a/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
+++ b/src/Symfony/Component/Messenger/DataCollector/MessengerDataCollector.php
@@ -25,7 +25,7 @@ use Symfony\Component\VarDumper\Caster\ClassStub;
  */
 class MessengerDataCollector extends DataCollector implements LateDataCollectorInterface
 {
-    private $traceableBuses = array();
+    private $traceableBuses = [];
 
     public function registerBus(string $name, TraceableMessageBus $bus)
     {
@@ -45,13 +45,13 @@ class MessengerDataCollector extends DataCollector implements LateDataCollectorI
      */
     public function lateCollect()
     {
-        $this->data = array('messages' => array(), 'buses' => array_keys($this->traceableBuses));
+        $this->data = ['messages' => [], 'buses' => array_keys($this->traceableBuses)];
 
-        $messages = array();
+        $messages = [];
         foreach ($this->traceableBuses as $busName => $bus) {
             foreach ($bus->getDispatchedMessages() as $message) {
                 $debugRepresentation = $this->cloneVar($this->collectMessage($busName, $message));
-                $messages[] = array($debugRepresentation, $message['callTime']);
+                $messages[] = [$debugRepresentation, $message['callTime']];
             }
         }
 
@@ -75,7 +75,7 @@ class MessengerDataCollector extends DataCollector implements LateDataCollectorI
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
         foreach ($this->traceableBuses as $traceableBus) {
             $traceableBus->reset();
         }
@@ -85,23 +85,23 @@ class MessengerDataCollector extends DataCollector implements LateDataCollectorI
     {
         $message = $tracedMessage['message'];
 
-        $debugRepresentation = array(
+        $debugRepresentation = [
             'bus' => $busName,
             'stamps' => $tracedMessage['stamps'] ?? null,
-            'message' => array(
+            'message' => [
                 'type' => new ClassStub(\get_class($message)),
                 'value' => $message,
-            ),
+            ],
             'caller' => $tracedMessage['caller'],
-        );
+        ];
 
         if (isset($tracedMessage['exception'])) {
             $exception = $tracedMessage['exception'];
 
-            $debugRepresentation['exception'] = array(
+            $debugRepresentation['exception'] = [
                 'type' => \get_class($exception),
                 'value' => $exception,
-            );
+            ];
         }
 
         return $debugRepresentation;
diff --git a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
index 5a18dd8683..8c4773462e 100644
--- a/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
+++ b/src/Symfony/Component/Messenger/DependencyInjection/MessengerPass.php
@@ -47,7 +47,7 @@ class MessengerPass implements CompilerPassInterface
      */
     public function process(ContainerBuilder $container)
     {
-        $busIds = array();
+        $busIds = [];
         foreach ($container->findTaggedServiceIds($this->busTag) as $busId => $tags) {
             $busIds[] = $busId;
             if ($container->hasParameter($busMiddlewareParameter = $busId.'.middleware')) {
@@ -69,8 +69,8 @@ class MessengerPass implements CompilerPassInterface
 
     private function registerHandlers(ContainerBuilder $container, array $busIds)
     {
-        $definitions = array();
-        $handlersByBusAndMessage = array();
+        $definitions = [];
+        $handlersByBusAndMessage = [];
 
         foreach ($container->findTaggedServiceIds($this->handlerTag, true) as $serviceId => $tags) {
             foreach ($tags as $tag) {
@@ -86,7 +86,7 @@ class MessengerPass implements CompilerPassInterface
                 }
 
                 if (isset($tag['handles'])) {
-                    $handles = isset($tag['method']) ? array($tag['handles'] => $tag['method']) : array($tag['handles']);
+                    $handles = isset($tag['method']) ? [$tag['handles'] => $tag['method']] : [$tag['handles']];
                 } else {
                     $handles = $this->guessHandledClasses($r, $serviceId);
                 }
@@ -115,7 +115,7 @@ class MessengerPass implements CompilerPassInterface
                                 throw new RuntimeException(sprintf('Invalid configuration %s for message "%s": bus "%s" does not exist.', $messageLocation, $message, $method['bus']));
                             }
 
-                            $buses = array($method['bus']);
+                            $buses = [$method['bus']];
                         }
 
                         $priority = $method['priority'] ?? $priority;
@@ -133,7 +133,7 @@ class MessengerPass implements CompilerPassInterface
                     }
 
                     if ('__invoke' !== $method) {
-                        $wrapperDefinition = (new Definition('callable'))->addArgument(array(new Reference($serviceId), $method))->setFactory('Closure::fromCallable');
+                        $wrapperDefinition = (new Definition('callable'))->addArgument([new Reference($serviceId), $method])->setFactory('Closure::fromCallable');
 
                         $definitions[$definitionId = '.messenger.method_on_object_wrapper.'.ContainerBuilder::hash($message.':'.$priority.':'.$serviceId.':'.$method)] = $wrapperDefinition;
                     } else {
@@ -158,7 +158,7 @@ class MessengerPass implements CompilerPassInterface
             }
         }
 
-        $handlersLocatorMappingByBus = array();
+        $handlersLocatorMappingByBus = [];
         foreach ($handlersByBusAndMessage as $bus => $handlersByMessage) {
             foreach ($handlersByMessage as $message => $handlerIds) {
                 $handlers = array_map(function (string $handlerId) { return new Reference($handlerId); }, $handlerIds);
@@ -169,7 +169,7 @@ class MessengerPass implements CompilerPassInterface
 
         foreach ($busIds as $bus) {
             $container->register($locatorId = $bus.'.messenger.handlers_locator', HandlersLocator::class)
-                ->setArgument(0, $handlersLocatorMappingByBus[$bus] ?? array())
+                ->setArgument(0, $handlersLocatorMappingByBus[$bus] ?? [])
             ;
             if ($container->has($handleMessageId = $bus.'.middleware.handle_message')) {
                 $container->getDefinition($handleMessageId)
@@ -182,7 +182,7 @@ class MessengerPass implements CompilerPassInterface
             $debugCommandMapping = $handlersByBusAndMessage;
             foreach ($busIds as $bus) {
                 if (!isset($debugCommandMapping[$bus])) {
-                    $debugCommandMapping[$bus] = array();
+                    $debugCommandMapping[$bus] = [];
                 }
             }
             $container->getDefinition('console.command.messenger_debug')->replaceArgument(0, $debugCommandMapping);
@@ -214,12 +214,12 @@ class MessengerPass implements CompilerPassInterface
             throw new RuntimeException(sprintf('Invalid handler service "%s": type-hint of argument "$%s" in method "%s::__invoke()" must be a class , "%s" given.', $serviceId, $parameters[0]->getName(), $handlerClass->getName(), $type));
         }
 
-        return array((string) $parameters[0]->getType());
+        return [(string) $parameters[0]->getType()];
     }
 
     private function registerReceivers(ContainerBuilder $container, array $busIds)
     {
-        $receiverMapping = array();
+        $receiverMapping = [];
 
         foreach ($container->findTaggedServiceIds($this->receiverTag) as $id => $tags) {
             $receiverClass = $container->findDefinition($id)->getClass();
@@ -237,11 +237,11 @@ class MessengerPass implements CompilerPassInterface
         }
 
         if ($container->hasDefinition('console.command.messenger_consume_messages')) {
-            $receiverNames = array();
+            $receiverNames = [];
             foreach ($receiverMapping as $name => $reference) {
                 $receiverNames[(string) $reference] = $name;
             }
-            $buses = array();
+            $buses = [];
             foreach ($busIds as $busId) {
                 $buses[$busId] = new Reference($busId);
             }
@@ -259,18 +259,18 @@ class MessengerPass implements CompilerPassInterface
     {
         $container->setDefinition(
             $tracedBusId = 'debug.traced.'.$busId,
-            (new Definition(TraceableMessageBus::class, array(new Reference($tracedBusId.'.inner'))))->setDecoratedService($busId)
+            (new Definition(TraceableMessageBus::class, [new Reference($tracedBusId.'.inner')]))->setDecoratedService($busId)
         );
 
-        $container->getDefinition('data_collector.messenger')->addMethodCall('registerBus', array($busId, new Reference($tracedBusId)));
+        $container->getDefinition('data_collector.messenger')->addMethodCall('registerBus', [$busId, new Reference($tracedBusId)]);
     }
 
     private function registerBusMiddleware(ContainerBuilder $container, string $busId, array $middlewareCollection)
     {
-        $middlewareReferences = array();
+        $middlewareReferences = [];
         foreach ($middlewareCollection as $middlewareItem) {
             $id = $middlewareItem['id'];
-            $arguments = $middlewareItem['arguments'] ?? array();
+            $arguments = $middlewareItem['arguments'] ?? [];
             if (!$container->has($messengerMiddlewareId = 'messenger.middleware.'.$id)) {
                 $messengerMiddlewareId = $id;
             }
diff --git a/src/Symfony/Component/Messenger/Envelope.php b/src/Symfony/Component/Messenger/Envelope.php
index a6e7db8476..02d0dca123 100644
--- a/src/Symfony/Component/Messenger/Envelope.php
+++ b/src/Symfony/Component/Messenger/Envelope.php
@@ -22,7 +22,7 @@ use Symfony\Component\Messenger\Stamp\StampInterface;
  */
 final class Envelope
 {
-    private $stamps = array();
+    private $stamps = [];
     private $message;
 
     /**
@@ -65,7 +65,7 @@ final class Envelope
     public function all(string $stampFqcn = null): array
     {
         if (null !== $stampFqcn) {
-            return $this->stamps[$stampFqcn] ?? array();
+            return $this->stamps[$stampFqcn] ?? [];
         }
 
         return $this->stamps;
diff --git a/src/Symfony/Component/Messenger/Handler/HandlersLocator.php b/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
index d0642498ba..9094eb3dbc 100644
--- a/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
+++ b/src/Symfony/Component/Messenger/Handler/HandlersLocator.php
@@ -37,10 +37,10 @@ class HandlersLocator implements HandlersLocatorInterface
      */
     public function getHandlers(Envelope $envelope): iterable
     {
-        $seen = array();
+        $seen = [];
 
         foreach (self::listTypes($envelope) as $type) {
-            foreach ($this->handlers[$type] ?? array() as $alias => $handler) {
+            foreach ($this->handlers[$type] ?? [] as $alias => $handler) {
                 if (!\in_array($handler, $seen, true)) {
                     yield $alias => $seen[] = $handler;
                 }
@@ -55,9 +55,9 @@ class HandlersLocator implements HandlersLocatorInterface
     {
         $class = \get_class($envelope->getMessage());
 
-        return array($class => $class)
+        return [$class => $class]
             + class_parents($class)
             + class_implements($class)
-            + array('*' => '*');
+            + ['*' => '*'];
     }
 }
diff --git a/src/Symfony/Component/Messenger/MessageBus.php b/src/Symfony/Component/Messenger/MessageBus.php
index bc4ad1c60d..28fe2d1111 100644
--- a/src/Symfony/Component/Messenger/MessageBus.php
+++ b/src/Symfony/Component/Messenger/MessageBus.php
@@ -28,7 +28,7 @@ class MessageBus implements MessageBusInterface
     /**
      * @param MiddlewareInterface[]|iterable $middlewareHandlers
      */
-    public function __construct(iterable $middlewareHandlers = array())
+    public function __construct(iterable $middlewareHandlers = [])
     {
         if ($middlewareHandlers instanceof \IteratorAggregate) {
             $this->middlewareAggregate = $middlewareHandlers;
diff --git a/src/Symfony/Component/Messenger/Middleware/LoggingMiddleware.php b/src/Symfony/Component/Messenger/Middleware/LoggingMiddleware.php
index 22c88edb7e..7518d018b8 100644
--- a/src/Symfony/Component/Messenger/Middleware/LoggingMiddleware.php
+++ b/src/Symfony/Component/Messenger/Middleware/LoggingMiddleware.php
@@ -34,10 +34,10 @@ class LoggingMiddleware implements MiddlewareInterface
     public function handle(Envelope $envelope, StackInterface $stack): Envelope
     {
         $message = $envelope->getMessage();
-        $context = array(
+        $context = [
             'message' => $message,
             'class' => \get_class($envelope->getMessage()),
-        );
+        ];
         $this->logger->debug('Starting handling message "{class}"', $context);
 
         try {
diff --git a/src/Symfony/Component/Messenger/Tests/Command/ConsumeMessagesCommandTest.php b/src/Symfony/Component/Messenger/Tests/Command/ConsumeMessagesCommandTest.php
index e5a1940d8c..336cd8129c 100644
--- a/src/Symfony/Component/Messenger/Tests/Command/ConsumeMessagesCommandTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Command/ConsumeMessagesCommandTest.php
@@ -19,7 +19,7 @@ class ConsumeMessagesCommandTest extends TestCase
 {
     public function testConfigurationWithDefaultReceiver()
     {
-        $command = new ConsumeMessagesCommand($this->createMock(ServiceLocator::class), $this->createMock(ServiceLocator::class), null, array('amqp'));
+        $command = new ConsumeMessagesCommand($this->createMock(ServiceLocator::class), $this->createMock(ServiceLocator::class), null, ['amqp']);
         $inputArgument = $command->getDefinition()->getArgument('receiver');
         $this->assertFalse($inputArgument->isRequired());
         $this->assertSame('amqp', $inputArgument->getDefault());
@@ -27,7 +27,7 @@ class ConsumeMessagesCommandTest extends TestCase
 
     public function testConfigurationWithoutDefaultReceiver()
     {
-        $command = new ConsumeMessagesCommand($this->createMock(ServiceLocator::class), $this->createMock(ServiceLocator::class), null, array('amqp', 'dummy'));
+        $command = new ConsumeMessagesCommand($this->createMock(ServiceLocator::class), $this->createMock(ServiceLocator::class), null, ['amqp', 'dummy']);
         $inputArgument = $command->getDefinition()->getArgument('receiver');
         $this->assertTrue($inputArgument->isRequired());
         $this->assertNull($inputArgument->getDefault());
diff --git a/src/Symfony/Component/Messenger/Tests/Command/DebugCommandTest.php b/src/Symfony/Component/Messenger/Tests/Command/DebugCommandTest.php
index fd52a5d039..727aefbfef 100644
--- a/src/Symfony/Component/Messenger/Tests/Command/DebugCommandTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Command/DebugCommandTest.php
@@ -39,20 +39,20 @@ class DebugCommandTest extends TestCase
     public function testOutput()
     {
         $command = new DebugCommand(
-            array(
-                'command_bus' => array(
-                    DummyCommand::class => array(DummyCommandHandler::class),
-                    MultipleBusesMessage::class => array(MultipleBusesMessageHandler::class),
-                ),
-                'query_bus' => array(
-                    DummyQuery::class => array(DummyQueryHandler::class),
-                    MultipleBusesMessage::class => array(MultipleBusesMessageHandler::class),
-                ),
-            )
+            [
+                'command_bus' => [
+                    DummyCommand::class => [DummyCommandHandler::class],
+                    MultipleBusesMessage::class => [MultipleBusesMessageHandler::class],
+                ],
+                'query_bus' => [
+                    DummyQuery::class => [DummyQueryHandler::class],
+                    MultipleBusesMessage::class => [MultipleBusesMessageHandler::class],
+                ],
+            ]
         );
 
         $tester = new CommandTester($command);
-        $tester->execute(array(), array('decorated' => false));
+        $tester->execute([], ['decorated' => false]);
 
         $this->assertSame(<<<TXT
 
@@ -88,7 +88,7 @@ TXT
             , $tester->getDisplay(true)
         );
 
-        $tester->execute(array('bus' => 'query_bus'), array('decorated' => false));
+        $tester->execute(['bus' => 'query_bus'], ['decorated' => false]);
 
         $this->assertSame(<<<TXT
 
@@ -115,10 +115,10 @@ TXT
 
     public function testOutputWithoutMessages()
     {
-        $command = new DebugCommand(array('command_bus' => array(), 'query_bus' => array()));
+        $command = new DebugCommand(['command_bus' => [], 'query_bus' => []]);
 
         $tester = new CommandTester($command);
-        $tester->execute(array(), array('decorated' => false));
+        $tester->execute([], ['decorated' => false]);
 
         $this->assertSame(<<<TXT
 
@@ -147,9 +147,9 @@ TXT
      */
     public function testExceptionOnUnknownBusArgument()
     {
-        $command = new DebugCommand(array('command_bus' => array(), 'query_bus' => array()));
+        $command = new DebugCommand(['command_bus' => [], 'query_bus' => []]);
 
         $tester = new CommandTester($command);
-        $tester->execute(array('bus' => 'unknown_bus'), array('decorated' => false));
+        $tester->execute(['bus' => 'unknown_bus'], ['decorated' => false]);
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/DependencyInjection/MessengerPassTest.php b/src/Symfony/Component/Messenger/Tests/DependencyInjection/MessengerPassTest.php
index f88743aea2..6c97608c9f 100644
--- a/src/Symfony/Component/Messenger/Tests/DependencyInjection/MessengerPassTest.php
+++ b/src/Symfony/Component/Messenger/Tests/DependencyInjection/MessengerPassTest.php
@@ -52,7 +52,7 @@ class MessengerPassTest extends TestCase
         ;
         $container
             ->register(MissingArgumentTypeHandler::class, MissingArgumentTypeHandler::class)
-            ->addTag('messenger.message_handler', array('handles' => SecondMessage::class))
+            ->addTag('messenger.message_handler', ['handles' => SecondMessage::class])
         ;
         $container
             ->register(DummyReceiver::class, DummyReceiver::class)
@@ -66,15 +66,15 @@ class MessengerPassTest extends TestCase
         $handlersLocatorDefinition = $container->getDefinition($busId.'.messenger.handlers_locator');
         $this->assertSame(HandlersLocator::class, $handlersLocatorDefinition->getClass());
         $this->assertEquals(
-            array(
-                DummyMessage::class => new IteratorArgument(array(new Reference(DummyHandler::class))),
-                SecondMessage::class => new IteratorArgument(array(new Reference(MissingArgumentTypeHandler::class))),
-            ),
+            [
+                DummyMessage::class => new IteratorArgument([new Reference(DummyHandler::class)]),
+                SecondMessage::class => new IteratorArgument([new Reference(MissingArgumentTypeHandler::class)]),
+            ],
             $handlersLocatorDefinition->getArgument(0)
         );
 
         $this->assertEquals(
-            array(DummyReceiver::class => new Reference(DummyReceiver::class)),
+            [DummyReceiver::class => new Reference(DummyReceiver::class)],
             $container->getDefinition('messenger.receiver_locator')->getArgument(0)
         );
     }
@@ -82,22 +82,22 @@ class MessengerPassTest extends TestCase
     public function testProcessHandlersByBus()
     {
         $container = $this->getContainerBuilder($commandBusId = 'command_bus');
-        $container->register($queryBusId = 'query_bus', MessageBusInterface::class)->setArgument(0, array())->addTag('messenger.bus');
+        $container->register($queryBusId = 'query_bus', MessageBusInterface::class)->setArgument(0, [])->addTag('messenger.bus');
         $container->register('messenger.middleware.handle_message', HandleMessageMiddleware::class)
             ->addArgument(null)
             ->setAbstract(true)
         ;
 
-        $middlewareHandlers = array(array('id' => 'handle_message'));
+        $middlewareHandlers = [['id' => 'handle_message']];
 
         $container->setParameter($commandBusId.'.middleware', $middlewareHandlers);
         $container->setParameter($queryBusId.'.middleware', $middlewareHandlers);
 
-        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', array('bus' => $commandBusId));
-        $container->register(DummyQueryHandler::class)->addTag('messenger.message_handler', array('bus' => $queryBusId));
+        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', ['bus' => $commandBusId]);
+        $container->register(DummyQueryHandler::class)->addTag('messenger.message_handler', ['bus' => $queryBusId]);
         $container->register(MultipleBusesMessageHandler::class)
-            ->addTag('messenger.message_handler', array('bus' => $commandBusId))
-            ->addTag('messenger.message_handler', array('bus' => $queryBusId))
+            ->addTag('messenger.message_handler', ['bus' => $commandBusId])
+            ->addTag('messenger.message_handler', ['bus' => $queryBusId])
         ;
 
         (new ResolveClassPass())->process($container);
@@ -106,20 +106,20 @@ class MessengerPassTest extends TestCase
         $commandBusHandlersLocatorDefinition = $container->getDefinition($commandBusId.'.messenger.handlers_locator');
         $this->assertSame(HandlersLocator::class, $commandBusHandlersLocatorDefinition->getClass());
         $this->assertEquals(
-            array(
-                MultipleBusesMessage::class => new IteratorArgument(array(new Reference(MultipleBusesMessageHandler::class))),
-                DummyCommand::class => new IteratorArgument(array(new Reference(DummyCommandHandler::class))),
-            ),
+            [
+                MultipleBusesMessage::class => new IteratorArgument([new Reference(MultipleBusesMessageHandler::class)]),
+                DummyCommand::class => new IteratorArgument([new Reference(DummyCommandHandler::class)]),
+            ],
             $commandBusHandlersLocatorDefinition->getArgument(0)
         );
 
         $queryBusHandlersLocatorDefinition = $container->getDefinition($queryBusId.'.messenger.handlers_locator');
         $this->assertSame(HandlersLocator::class, $queryBusHandlersLocatorDefinition->getClass());
         $this->assertEquals(
-            array(
-                DummyQuery::class => new IteratorArgument(array(new Reference(DummyQueryHandler::class))),
-                MultipleBusesMessage::class => new IteratorArgument(array(new Reference(MultipleBusesMessageHandler::class))),
-            ),
+            [
+                DummyQuery::class => new IteratorArgument([new Reference(DummyQueryHandler::class)]),
+                MultipleBusesMessage::class => new IteratorArgument([new Reference(MultipleBusesMessageHandler::class)]),
+            ],
             $queryBusHandlersLocatorDefinition->getArgument(0)
         );
     }
@@ -132,7 +132,7 @@ class MessengerPassTest extends TestCase
     {
         $container = $this->getContainerBuilder($commandBusId = 'command_bus');
 
-        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', array('bus' => 'unknown_bus'));
+        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', ['bus' => 'unknown_bus']);
 
         (new ResolveClassPass())->process($container);
         (new MessengerPass())->process($container);
@@ -155,10 +155,10 @@ class MessengerPassTest extends TestCase
         $handlersMapping = $container->getDefinition($busId.'.messenger.handlers_locator')->getArgument(0);
 
         $this->assertArrayHasKey(DummyMessage::class, $handlersMapping);
-        $this->assertEquals(new IteratorArgument(array(new Reference(HandlerWithMultipleMessages::class))), $handlersMapping[DummyMessage::class]);
+        $this->assertEquals(new IteratorArgument([new Reference(HandlerWithMultipleMessages::class)]), $handlersMapping[DummyMessage::class]);
 
         $this->assertArrayHasKey(SecondMessage::class, $handlersMapping);
-        $this->assertEquals(new IteratorArgument(array(new Reference(PrioritizedHandler::class), new Reference(HandlerWithMultipleMessages::class))), $handlersMapping[SecondMessage::class]);
+        $this->assertEquals(new IteratorArgument([new Reference(PrioritizedHandler::class), new Reference(HandlerWithMultipleMessages::class)]), $handlersMapping[SecondMessage::class]);
     }
 
     public function testGetClassesAndMethodsAndPrioritiesFromTheSubscriber()
@@ -183,8 +183,8 @@ class MessengerPassTest extends TestCase
         $dummyHandlerReference = $handlersMapping[DummyMessage::class]->getValues()[0];
         $dummyHandlerDefinition = $container->getDefinition($dummyHandlerReference);
         $this->assertSame('callable', $dummyHandlerDefinition->getClass());
-        $this->assertEquals(array(new Reference(HandlerMappingMethods::class), 'dummyMethod'), $dummyHandlerDefinition->getArgument(0));
-        $this->assertSame(array('Closure', 'fromCallable'), $dummyHandlerDefinition->getFactory());
+        $this->assertEquals([new Reference(HandlerMappingMethods::class), 'dummyMethod'], $dummyHandlerDefinition->getArgument(0));
+        $this->assertSame(['Closure', 'fromCallable'], $dummyHandlerDefinition->getFactory());
 
         $secondHandlerReference = $handlersMapping[SecondMessage::class]->getValues()[1];
         $secondHandlerDefinition = $container->getDefinition($secondHandlerReference);
@@ -227,11 +227,11 @@ class MessengerPassTest extends TestCase
     {
         $container = $this->getContainerBuilder();
         $container->register('message_bus', MessageBusInterface::class)->addTag('messenger.bus');
-        $container->register(AmqpReceiver::class, AmqpReceiver::class)->addTag('messenger.receiver', array('alias' => 'amqp'));
+        $container->register(AmqpReceiver::class, AmqpReceiver::class)->addTag('messenger.receiver', ['alias' => 'amqp']);
 
         (new MessengerPass())->process($container);
 
-        $this->assertEquals(array('amqp' => new Reference(AmqpReceiver::class), AmqpReceiver::class => new Reference(AmqpReceiver::class)), $container->getDefinition('messenger.receiver_locator')->getArgument(0));
+        $this->assertEquals(['amqp' => new Reference(AmqpReceiver::class), AmqpReceiver::class => new Reference(AmqpReceiver::class)], $container->getDefinition('messenger.receiver_locator')->getArgument(0));
     }
 
     public function testItRegistersReceiversWithoutTagName()
@@ -242,27 +242,27 @@ class MessengerPassTest extends TestCase
 
         (new MessengerPass())->process($container);
 
-        $this->assertEquals(array(AmqpReceiver::class => new Reference(AmqpReceiver::class)), $container->getDefinition('messenger.receiver_locator')->getArgument(0));
+        $this->assertEquals([AmqpReceiver::class => new Reference(AmqpReceiver::class)], $container->getDefinition('messenger.receiver_locator')->getArgument(0));
     }
 
     public function testItRegistersMultipleReceiversAndSetsTheReceiverNamesOnTheCommand()
     {
         $container = $this->getContainerBuilder();
-        $container->register('console.command.messenger_consume_messages', ConsumeMessagesCommand::class)->setArguments(array(
+        $container->register('console.command.messenger_consume_messages', ConsumeMessagesCommand::class)->setArguments([
             null,
             new Reference('messenger.receiver_locator'),
             null,
             null,
             null,
-        ));
+        ]);
 
-        $container->register(AmqpReceiver::class, AmqpReceiver::class)->addTag('messenger.receiver', array('alias' => 'amqp'));
-        $container->register(DummyReceiver::class, DummyReceiver::class)->addTag('messenger.receiver', array('alias' => 'dummy'));
+        $container->register(AmqpReceiver::class, AmqpReceiver::class)->addTag('messenger.receiver', ['alias' => 'amqp']);
+        $container->register(DummyReceiver::class, DummyReceiver::class)->addTag('messenger.receiver', ['alias' => 'dummy']);
 
         (new MessengerPass())->process($container);
 
-        $this->assertSame(array('amqp', 'dummy'), $container->getDefinition('console.command.messenger_consume_messages')->getArgument(3));
-        $this->assertSame(array('message_bus'), $container->getDefinition('console.command.messenger_consume_messages')->getArgument(4));
+        $this->assertSame(['amqp', 'dummy'], $container->getDefinition('console.command.messenger_consume_messages')->getArgument(3));
+        $this->assertSame(['message_bus'], $container->getDefinition('console.command.messenger_consume_messages')->getArgument(4));
     }
 
     public function testItShouldNotThrowIfGeneratorIsReturnedInsteadOfArray()
@@ -279,17 +279,17 @@ class MessengerPassTest extends TestCase
 
         $this->assertArrayHasKey(DummyMessage::class, $handlersMapping);
         $firstReference = $handlersMapping[DummyMessage::class]->getValues()[0];
-        $this->assertEquals(array(new Reference(HandlerWithGenerators::class), 'dummyMethod'), $container->getDefinition($firstReference)->getArgument(0));
+        $this->assertEquals([new Reference(HandlerWithGenerators::class), 'dummyMethod'], $container->getDefinition($firstReference)->getArgument(0));
 
         $this->assertArrayHasKey(SecondMessage::class, $handlersMapping);
         $secondReference = $handlersMapping[SecondMessage::class]->getValues()[0];
-        $this->assertEquals(array(new Reference(HandlerWithGenerators::class), 'secondMessage'), $container->getDefinition($secondReference)->getArgument(0));
+        $this->assertEquals([new Reference(HandlerWithGenerators::class), 'secondMessage'], $container->getDefinition($secondReference)->getArgument(0));
     }
 
     public function testItRegistersHandlersOnDifferentBuses()
     {
         $container = $this->getContainerBuilder($eventsBusId = 'event_bus');
-        $container->register($commandsBusId = 'command_bus', MessageBusInterface::class)->addTag('messenger.bus')->setArgument(0, array());
+        $container->register($commandsBusId = 'command_bus', MessageBusInterface::class)->addTag('messenger.bus')->setArgument(0, []);
 
         $container
             ->register(HandlerOnSpecificBuses::class, HandlerOnSpecificBuses::class)
@@ -300,15 +300,15 @@ class MessengerPassTest extends TestCase
 
         $eventsHandlerMapping = $container->getDefinition($eventsBusId.'.messenger.handlers_locator')->getArgument(0);
 
-        $this->assertEquals(array(DummyMessage::class), array_keys($eventsHandlerMapping));
+        $this->assertEquals([DummyMessage::class], array_keys($eventsHandlerMapping));
         $firstReference = $eventsHandlerMapping[DummyMessage::class]->getValues()[0];
-        $this->assertEquals(array(new Reference(HandlerOnSpecificBuses::class), 'dummyMethodForEvents'), $container->getDefinition($firstReference)->getArgument(0));
+        $this->assertEquals([new Reference(HandlerOnSpecificBuses::class), 'dummyMethodForEvents'], $container->getDefinition($firstReference)->getArgument(0));
 
         $commandsHandlerMapping = $container->getDefinition($commandsBusId.'.messenger.handlers_locator')->getArgument(0);
 
-        $this->assertEquals(array(DummyMessage::class), array_keys($commandsHandlerMapping));
+        $this->assertEquals([DummyMessage::class], array_keys($commandsHandlerMapping));
         $firstReference = $commandsHandlerMapping[DummyMessage::class]->getValues()[0];
-        $this->assertEquals(array(new Reference(HandlerOnSpecificBuses::class), 'dummyMethodForCommands'), $container->getDefinition($firstReference)->getArgument(0));
+        $this->assertEquals([new Reference(HandlerOnSpecificBuses::class), 'dummyMethodForCommands'], $container->getDefinition($firstReference)->getArgument(0));
     }
 
     /**
@@ -457,8 +457,8 @@ class MessengerPassTest extends TestCase
         (new MessengerPass())->process($container);
 
         $this->assertTrue($container->hasDefinition($debuggedFooBusId = 'debug.traced.'.$fooBusId));
-        $this->assertSame(array($fooBusId, null, 0), $container->getDefinition($debuggedFooBusId)->getDecoratedService());
-        $this->assertEquals(array(array('registerBus', array($fooBusId, new Reference($debuggedFooBusId)))), $container->getDefinition('data_collector.messenger')->getMethodCalls());
+        $this->assertSame([$fooBusId, null, 0], $container->getDefinition($debuggedFooBusId)->getDecoratedService());
+        $this->assertEquals([['registerBus', [$fooBusId, new Reference($debuggedFooBusId)]]], $container->getDefinition('data_collector.messenger')->getMethodCalls());
     }
 
     public function testRegistersMiddlewareFromServices()
@@ -468,34 +468,34 @@ class MessengerPassTest extends TestCase
         $container->register('middleware_with_factory_using_default', UselessMiddleware::class)->addArgument('some_default')->setAbstract(true);
         $container->register(UselessMiddleware::class, UselessMiddleware::class);
 
-        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', array(
-            array('id' => UselessMiddleware::class),
-            array('id' => 'middleware_with_factory', 'arguments' => array('index_0' => 'foo', 'bar')),
-            array('id' => 'middleware_with_factory_using_default'),
-        ));
+        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', [
+            ['id' => UselessMiddleware::class],
+            ['id' => 'middleware_with_factory', 'arguments' => ['index_0' => 'foo', 'bar']],
+            ['id' => 'middleware_with_factory_using_default'],
+        ]);
 
         (new MessengerPass())->process($container);
         (new ResolveChildDefinitionsPass())->process($container);
 
         $this->assertTrue($container->hasDefinition($factoryChildMiddlewareId = $fooBusId.'.middleware.middleware_with_factory'));
         $this->assertEquals(
-            array('foo', 'bar'),
+            ['foo', 'bar'],
             $container->getDefinition($factoryChildMiddlewareId)->getArguments(),
             'parent default argument is overridden, and next ones appended'
         );
 
         $this->assertTrue($container->hasDefinition($factoryWithDefaultChildMiddlewareId = $fooBusId.'.middleware.middleware_with_factory_using_default'));
         $this->assertEquals(
-            array('some_default'),
+            ['some_default'],
             $container->getDefinition($factoryWithDefaultChildMiddlewareId)->getArguments(),
             'parent default argument is used'
         );
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new Reference(UselessMiddleware::class),
             new Reference($factoryChildMiddlewareId),
             new Reference($factoryWithDefaultChildMiddlewareId),
-        ), $container->getDefinition($fooBusId)->getArgument(0)->getValues());
+        ], $container->getDefinition($fooBusId)->getArgument(0)->getValues());
         $this->assertFalse($container->hasParameter($middlewareParameter));
     }
 
@@ -506,9 +506,9 @@ class MessengerPassTest extends TestCase
     public function testCannotRegistersAnUndefinedMiddleware()
     {
         $container = $this->getContainerBuilder($fooBusId = 'messenger.bus.foo');
-        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', array(
-            array('id' => 'not_defined_middleware', 'arguments' => array()),
-        ));
+        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', [
+            ['id' => 'not_defined_middleware', 'arguments' => []],
+        ]);
 
         (new MessengerPass())->process($container);
     }
@@ -521,9 +521,9 @@ class MessengerPassTest extends TestCase
     {
         $container = $this->getContainerBuilder($fooBusId = 'messenger.bus.foo');
         $container->register('not_an_abstract_definition', UselessMiddleware::class);
-        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', array(
-            array('id' => 'not_an_abstract_definition', 'arguments' => array('foo')),
-        ));
+        $container->setParameter($middlewareParameter = $fooBusId.'.middleware', [
+            ['id' => 'not_an_abstract_definition', 'arguments' => ['foo']],
+        ]);
 
         (new MessengerPass())->process($container);
     }
@@ -531,41 +531,41 @@ class MessengerPassTest extends TestCase
     public function testItRegistersTheDebugCommand()
     {
         $container = $this->getContainerBuilder($commandBusId = 'command_bus');
-        $container->register($queryBusId = 'query_bus', MessageBusInterface::class)->setArgument(0, array())->addTag('messenger.bus');
-        $container->register($emptyBus = 'empty_bus', MessageBusInterface::class)->setArgument(0, array())->addTag('messenger.bus');
+        $container->register($queryBusId = 'query_bus', MessageBusInterface::class)->setArgument(0, [])->addTag('messenger.bus');
+        $container->register($emptyBus = 'empty_bus', MessageBusInterface::class)->setArgument(0, [])->addTag('messenger.bus');
         $container->register('messenger.middleware.handle_message', HandleMessageMiddleware::class)
             ->addArgument(null)
             ->setAbstract(true)
         ;
 
-        $container->register('console.command.messenger_debug', DebugCommand::class)->addArgument(array());
+        $container->register('console.command.messenger_debug', DebugCommand::class)->addArgument([]);
 
-        $middlewareHandlers = array(array('id' => 'handle_message'));
+        $middlewareHandlers = [['id' => 'handle_message']];
 
         $container->setParameter($commandBusId.'.middleware', $middlewareHandlers);
         $container->setParameter($queryBusId.'.middleware', $middlewareHandlers);
 
-        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', array('bus' => $commandBusId));
-        $container->register(DummyQueryHandler::class)->addTag('messenger.message_handler', array('bus' => $queryBusId));
+        $container->register(DummyCommandHandler::class)->addTag('messenger.message_handler', ['bus' => $commandBusId]);
+        $container->register(DummyQueryHandler::class)->addTag('messenger.message_handler', ['bus' => $queryBusId]);
         $container->register(MultipleBusesMessageHandler::class)
-            ->addTag('messenger.message_handler', array('bus' => $commandBusId))
-            ->addTag('messenger.message_handler', array('bus' => $queryBusId))
+            ->addTag('messenger.message_handler', ['bus' => $commandBusId])
+            ->addTag('messenger.message_handler', ['bus' => $queryBusId])
         ;
 
         (new ResolveClassPass())->process($container);
         (new MessengerPass())->process($container);
 
-        $this->assertEquals(array(
-            $commandBusId => array(
-                DummyCommand::class => array(DummyCommandHandler::class),
-                MultipleBusesMessage::class => array(MultipleBusesMessageHandler::class),
-            ),
-            $queryBusId => array(
-                DummyQuery::class => array(DummyQueryHandler::class),
-                MultipleBusesMessage::class => array(MultipleBusesMessageHandler::class),
-            ),
-            $emptyBus => array(),
-        ), $container->getDefinition('console.command.messenger_debug')->getArgument(0));
+        $this->assertEquals([
+            $commandBusId => [
+                DummyCommand::class => [DummyCommandHandler::class],
+                MultipleBusesMessage::class => [MultipleBusesMessageHandler::class],
+            ],
+            $queryBusId => [
+                DummyQuery::class => [DummyQueryHandler::class],
+                MultipleBusesMessage::class => [MultipleBusesMessageHandler::class],
+            ],
+            $emptyBus => [],
+        ], $container->getDefinition('console.command.messenger_debug')->getArgument(0));
     }
 
     private function getContainerBuilder(string $busId = 'message_bus'): ContainerBuilder
@@ -573,7 +573,7 @@ class MessengerPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->setParameter('kernel.debug', true);
 
-        $container->register($busId, MessageBusInterface::class)->addTag('messenger.bus')->setArgument(0, array());
+        $container->register($busId, MessageBusInterface::class)->addTag('messenger.bus')->setArgument(0, []);
         if ('message_bus' !== $busId) {
             $container->setAlias('message_bus', $busId);
         }
@@ -633,7 +633,7 @@ class UndefinedMessageHandlerViaSubscriberInterface implements MessageSubscriber
 {
     public static function getHandledMessages(): iterable
     {
-        return array(UndefinedMessage::class);
+        return [UndefinedMessage::class];
     }
 
     public function __invoke()
@@ -670,10 +670,10 @@ class HandlerWithMultipleMessages implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        return array(
+        return [
             DummyMessage::class,
             SecondMessage::class,
-        );
+        ];
     }
 
     public function __invoke()
@@ -685,7 +685,7 @@ class PrioritizedHandler implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        yield SecondMessage::class => array('priority' => 10);
+        yield SecondMessage::class => ['priority' => 10];
     }
 
     public function __invoke()
@@ -698,7 +698,7 @@ class HandlerMappingMethods implements MessageSubscriberInterface
     public static function getHandledMessages(): iterable
     {
         yield DummyMessage::class => 'dummyMethod';
-        yield SecondMessage::class => array('method' => 'secondMessage', 'priority' => 20);
+        yield SecondMessage::class => ['method' => 'secondMessage', 'priority' => 20];
     }
 
     public function dummyMethod()
@@ -714,9 +714,9 @@ class HandlerMappingWithNonExistentMethod implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        return array(
+        return [
             DummyMessage::class => 'dummyMethod',
-        );
+        ];
     }
 }
 
@@ -724,7 +724,7 @@ class HandleNoMessageHandler implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        return array();
+        return [];
     }
 
     public function __invoke()
@@ -753,8 +753,8 @@ class HandlerOnSpecificBuses implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        yield DummyMessage::class => array('method' => 'dummyMethodForEvents', 'bus' => 'event_bus');
-        yield DummyMessage::class => array('method' => 'dummyMethodForCommands', 'bus' => 'command_bus');
+        yield DummyMessage::class => ['method' => 'dummyMethodForEvents', 'bus' => 'event_bus'];
+        yield DummyMessage::class => ['method' => 'dummyMethodForCommands', 'bus' => 'command_bus'];
     }
 
     public function dummyMethodForEvents()
@@ -770,7 +770,7 @@ class HandlerOnUndefinedBus implements MessageSubscriberInterface
 {
     public static function getHandledMessages(): iterable
     {
-        yield DummyMessage::class => array('method' => 'dummyMethodForSomeBus', 'bus' => 'some_undefined_bus');
+        yield DummyMessage::class => ['method' => 'dummyMethodForSomeBus', 'bus' => 'some_undefined_bus'];
     }
 
     public function dummyMethodForSomeBus()
diff --git a/src/Symfony/Component/Messenger/Tests/EnvelopeTest.php b/src/Symfony/Component/Messenger/Tests/EnvelopeTest.php
index 449acd8125..67609d8cd9 100644
--- a/src/Symfony/Component/Messenger/Tests/EnvelopeTest.php
+++ b/src/Symfony/Component/Messenger/Tests/EnvelopeTest.php
@@ -52,7 +52,7 @@ class EnvelopeTest extends TestCase
     {
         $envelope = (new Envelope($dummy = new DummyMessage('dummy')))
             ->with($receivedStamp = new ReceivedStamp())
-            ->with($validationStamp = new ValidationStamp(array('foo')))
+            ->with($validationStamp = new ValidationStamp(['foo']))
         ;
 
         $stamps = $envelope->all();
diff --git a/src/Symfony/Component/Messenger/Tests/Handler/HandlersLocatorTest.php b/src/Symfony/Component/Messenger/Tests/Handler/HandlersLocatorTest.php
index 4b4e84246d..0c258f395b 100644
--- a/src/Symfony/Component/Messenger/Tests/Handler/HandlersLocatorTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Handler/HandlersLocatorTest.php
@@ -20,11 +20,11 @@ class HandlersLocatorTest extends TestCase
 {
     public function testItYieldsProvidedAliasAsKey()
     {
-        $handler = $this->createPartialMock(\stdClass::class, array('__invoke'));
-        $locator = new HandlersLocator(array(
-            DummyMessage::class => array('dummy' => $handler),
-        ));
+        $handler = $this->createPartialMock(\stdClass::class, ['__invoke']);
+        $locator = new HandlersLocator([
+            DummyMessage::class => ['dummy' => $handler],
+        ]);
 
-        $this->assertSame(array('dummy' => $handler), iterator_to_array($locator->getHandlers(new Envelope(new DummyMessage('a')))));
+        $this->assertSame(['dummy' => $handler], iterator_to_array($locator->getHandlers(new Envelope(new DummyMessage('a')))));
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/MessageBusTest.php b/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
index 3dedb59c63..1d56d10104 100644
--- a/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
+++ b/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
@@ -58,10 +58,10 @@ class MessageBusTest extends TestCase
             ->willReturn($envelope)
         ;
 
-        $bus = new MessageBus(array(
+        $bus = new MessageBus([
             $firstMiddleware,
             $secondMiddleware,
-        ));
+        ]);
 
         $bus->dispatch($message);
     }
@@ -95,11 +95,11 @@ class MessageBusTest extends TestCase
             ->willReturn($envelopeWithAnotherStamp)
         ;
 
-        $bus = new MessageBus(array(
+        $bus = new MessageBus([
             $firstMiddleware,
             $secondMiddleware,
             $thirdMiddleware,
-        ));
+        ]);
 
         $bus->dispatch($envelope);
     }
@@ -107,7 +107,7 @@ class MessageBusTest extends TestCase
     public function testThatAMiddlewareCanUpdateTheMessageWhileKeepingTheEnvelopeStamps()
     {
         $message = new DummyMessage('Hello');
-        $envelope = new Envelope($message, ...$stamps = array(new ReceivedStamp()));
+        $envelope = new Envelope($message, ...$stamps = [new ReceivedStamp()]);
 
         $changedMessage = new DummyMessage('Changed');
         $expectedEnvelope = new Envelope($changedMessage, ...$stamps);
@@ -127,10 +127,10 @@ class MessageBusTest extends TestCase
             ->willReturn($envelope)
         ;
 
-        $bus = new MessageBus(array(
+        $bus = new MessageBus([
             $firstMiddleware,
             $secondMiddleware,
-        ));
+        ]);
 
         $bus->dispatch($envelope);
     }
diff --git a/src/Symfony/Component/Messenger/Tests/Middleware/ActivationMiddlewareTest.php b/src/Symfony/Component/Messenger/Tests/Middleware/ActivationMiddlewareTest.php
index dab0a0fb11..5c28c0de7c 100644
--- a/src/Symfony/Component/Messenger/Tests/Middleware/ActivationMiddlewareTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Middleware/ActivationMiddlewareTest.php
@@ -42,7 +42,7 @@ class ActivationMiddlewareTest extends MiddlewareTestCase
         $message = new DummyMessage('Hello');
         $envelope = new Envelope($message);
 
-        $activated = $this->createPartialMock(\stdClass::class, array('__invoke'));
+        $activated = $this->createPartialMock(\stdClass::class, ['__invoke']);
         $activated->expects($this->once())->method('__invoke')->with($envelope)->willReturn(true);
 
         $stack = $this->getStackMock(false);
diff --git a/src/Symfony/Component/Messenger/Tests/Middleware/HandleMessageMiddlewareTest.php b/src/Symfony/Component/Messenger/Tests/Middleware/HandleMessageMiddlewareTest.php
index 457428c435..953124fb9b 100644
--- a/src/Symfony/Component/Messenger/Tests/Middleware/HandleMessageMiddlewareTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Middleware/HandleMessageMiddlewareTest.php
@@ -26,11 +26,11 @@ class HandleMessageMiddlewareTest extends MiddlewareTestCase
         $message = new DummyMessage('Hey');
         $envelope = new Envelope($message);
 
-        $handler = $this->createPartialMock(\stdClass::class, array('__invoke'));
+        $handler = $this->createPartialMock(\stdClass::class, ['__invoke']);
 
-        $middleware = new HandleMessageMiddleware(new HandlersLocator(array(
-            DummyMessage::class => array($handler),
-        )));
+        $middleware = new HandleMessageMiddleware(new HandlersLocator([
+            DummyMessage::class => [$handler],
+        ]));
 
         $handler->expects($this->once())->method('__invoke')->with($message);
 
@@ -45,9 +45,9 @@ class HandleMessageMiddlewareTest extends MiddlewareTestCase
         $message = new DummyMessage('Hey');
         $envelope = new Envelope($message);
 
-        $middleware = new HandleMessageMiddleware(new HandlersLocator(array(
+        $middleware = new HandleMessageMiddleware(new HandlersLocator([
             DummyMessage::class => $handlers,
-        )));
+        ]));
 
         $envelope = $middleware->handle($envelope, $this->getStackMock());
 
@@ -56,34 +56,34 @@ class HandleMessageMiddlewareTest extends MiddlewareTestCase
 
     public function itAddsHandledStampsProvider()
     {
-        $first = $this->createPartialMock(\stdClass::class, array('__invoke'));
+        $first = $this->createPartialMock(\stdClass::class, ['__invoke']);
         $first->method('__invoke')->willReturn('first result');
         $firstClass = \get_class($first);
 
-        $second = $this->createPartialMock(\stdClass::class, array('__invoke'));
+        $second = $this->createPartialMock(\stdClass::class, ['__invoke']);
         $second->method('__invoke')->willReturn(null);
         $secondClass = \get_class($second);
 
-        yield 'A stamp is added' => array(
-            array($first),
-            array(new HandledStamp('first result', $firstClass.'::__invoke')),
-        );
+        yield 'A stamp is added' => [
+            [$first],
+            [new HandledStamp('first result', $firstClass.'::__invoke')],
+        ];
 
-        yield 'A stamp is added per handler' => array(
-            array($first, $second),
-            array(
+        yield 'A stamp is added per handler' => [
+            [$first, $second],
+            [
                 new HandledStamp('first result', $firstClass.'::__invoke'),
                 new HandledStamp(null, $secondClass.'::__invoke'),
-            ),
-        );
+            ],
+        ];
 
-        yield 'Yielded locator alias is used' => array(
-            array('first_alias' => $first, $second),
-            array(
+        yield 'Yielded locator alias is used' => [
+            ['first_alias' => $first, $second],
+            [
                 new HandledStamp('first result', $firstClass.'::__invoke', 'first_alias'),
                 new HandledStamp(null, $secondClass.'::__invoke'),
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -92,14 +92,14 @@ class HandleMessageMiddlewareTest extends MiddlewareTestCase
      */
     public function testThrowsNoHandlerException()
     {
-        $middleware = new HandleMessageMiddleware(new HandlersLocator(array()));
+        $middleware = new HandleMessageMiddleware(new HandlersLocator([]));
 
         $middleware->handle(new Envelope(new DummyMessage('Hey')), new StackMiddleware());
     }
 
     public function testAllowNoHandlers()
     {
-        $middleware = new HandleMessageMiddleware(new HandlersLocator(array()), true);
+        $middleware = new HandleMessageMiddleware(new HandlersLocator([]), true);
 
         $this->assertInstanceOf(Envelope::class, $middleware->handle(new Envelope(new DummyMessage('Hey')), new StackMiddleware()));
     }
diff --git a/src/Symfony/Component/Messenger/Tests/Middleware/SendMessageMiddlewareTest.php b/src/Symfony/Component/Messenger/Tests/Middleware/SendMessageMiddlewareTest.php
index 572f237b5d..e74b18245e 100644
--- a/src/Symfony/Component/Messenger/Tests/Middleware/SendMessageMiddlewareTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Middleware/SendMessageMiddlewareTest.php
@@ -30,7 +30,7 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope($message);
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array(DummyMessage::class => array($sender))));
+        $middleware = new SendMessageMiddleware(new SendersLocator([DummyMessage::class => [$sender]]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -47,7 +47,7 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope(new ChildDummyMessage('Hey'));
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array(DummyMessage::class => array($sender))));
+        $middleware = new SendMessageMiddleware(new SendersLocator([DummyMessage::class => [$sender]]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -60,9 +60,9 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope($message);
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array('*' => array($sender)), array(
+        $middleware = new SendMessageMiddleware(new SendersLocator(['*' => [$sender]], [
             DummyMessage::class => true,
-        )));
+        ]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -75,9 +75,9 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope($message);
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array('*' => array($sender)), array(
+        $middleware = new SendMessageMiddleware(new SendersLocator(['*' => [$sender]], [
             DummyMessage::class => true,
-        )));
+        ]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -90,9 +90,9 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope($message);
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array('*' => array($sender)), array(
+        $middleware = new SendMessageMiddleware(new SendersLocator(['*' => [$sender]], [
             DummyMessageInterface::class => true,
-        )));
+        ]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -105,9 +105,9 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $envelope = new Envelope($message);
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array('*' => array($sender)), array(
+        $middleware = new SendMessageMiddleware(new SendersLocator(['*' => [$sender]], [
             '*' => true,
-        )));
+        ]));
 
         $sender->expects($this->once())->method('send')->with($envelope)->willReturn($envelope);
 
@@ -119,7 +119,7 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
         $message = new DummyMessage('Hey');
         $envelope = new Envelope($message);
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array()));
+        $middleware = new SendMessageMiddleware(new SendersLocator([]));
 
         $middleware->handle($envelope, $this->getStackMock());
     }
@@ -130,7 +130,7 @@ class SendMessageMiddlewareTest extends MiddlewareTestCase
 
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
 
-        $middleware = new SendMessageMiddleware(new SendersLocator(array('*' => array($sender))));
+        $middleware = new SendMessageMiddleware(new SendersLocator(['*' => [$sender]]));
 
         $sender->expects($this->never())->method('send');
 
diff --git a/src/Symfony/Component/Messenger/Tests/Middleware/TraceableMiddlewareTest.php b/src/Symfony/Component/Messenger/Tests/Middleware/TraceableMiddlewareTest.php
index c13f1c2262..35a8ad34f5 100644
--- a/src/Symfony/Component/Messenger/Tests/Middleware/TraceableMiddlewareTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Middleware/TraceableMiddlewareTest.php
@@ -44,21 +44,21 @@ class TraceableMiddlewareTest extends MiddlewareTestCase
         $stopwatch->expects($this->exactly(2))
             ->method('start')
             ->withConsecutive(
-                array($this->matches('"%sMiddlewareInterface%s" on "command_bus"'), 'messenger.middleware'),
-                array('Tail on "command_bus"', 'messenger.middleware')
+                [$this->matches('"%sMiddlewareInterface%s" on "command_bus"'), 'messenger.middleware'],
+                ['Tail on "command_bus"', 'messenger.middleware']
             )
         ;
         $stopwatch->expects($this->exactly(2))
             ->method('stop')
             ->withConsecutive(
-                array($this->matches('"%sMiddlewareInterface%s" on "command_bus"')),
-                array('Tail on "command_bus"')
+                [$this->matches('"%sMiddlewareInterface%s" on "command_bus"')],
+                ['Tail on "command_bus"']
             )
         ;
 
         $traced = new TraceableMiddleware($stopwatch, $busId);
 
-        $traced->handle($envelope, new StackMiddleware(new \ArrayIterator(array(null, $middleware))));
+        $traced->handle($envelope, new StackMiddleware(new \ArrayIterator([null, $middleware])));
     }
 
     /**
@@ -88,6 +88,6 @@ class TraceableMiddlewareTest extends MiddlewareTestCase
         ;
 
         $traced = new TraceableMiddleware($stopwatch, $busId);
-        $traced->handle(new Envelope(new DummyMessage('Hello')), new StackMiddleware(new \ArrayIterator(array(null, $middleware))));
+        $traced->handle(new Envelope(new DummyMessage('Hello')), new StackMiddleware(new \ArrayIterator([null, $middleware])));
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/Middleware/ValidationMiddlewareTest.php b/src/Symfony/Component/Messenger/Tests/Middleware/ValidationMiddlewareTest.php
index c3c2fff3d1..510396f0a3 100644
--- a/src/Symfony/Component/Messenger/Tests/Middleware/ValidationMiddlewareTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Middleware/ValidationMiddlewareTest.php
@@ -40,7 +40,7 @@ class ValidationMiddlewareTest extends MiddlewareTestCase
     public function testValidateWithStampAndNextMiddleware()
     {
         $message = new DummyMessage('Hey');
-        $envelope = (new Envelope($message))->with(new ValidationStamp($groups = array('Default', 'Extra')));
+        $envelope = (new Envelope($message))->with(new ValidationStamp($groups = ['Default', 'Extra']));
         $validator = $this->createMock(ValidatorInterface::class);
         $validator
             ->expects($this->once())
diff --git a/src/Symfony/Component/Messenger/Tests/Stamp/HandledStampTest.php b/src/Symfony/Component/Messenger/Tests/Stamp/HandledStampTest.php
index 72584c6740..2bdc7f4050 100644
--- a/src/Symfony/Component/Messenger/Tests/Stamp/HandledStampTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Stamp/HandledStampTest.php
@@ -46,21 +46,21 @@ class HandledStampTest extends TestCase
 
     public function provideCallables()
     {
-        yield array(function () {}, 'Closure');
-        yield array('var_dump', 'var_dump');
-        yield array(new DummyCommandHandler(), DummyCommandHandler::class.'::__invoke');
-        yield array(
-            array(new DummyCommandHandlerWithSpecificMethod(), 'handle'),
+        yield [function () {}, 'Closure'];
+        yield ['var_dump', 'var_dump'];
+        yield [new DummyCommandHandler(), DummyCommandHandler::class.'::__invoke'];
+        yield [
+            [new DummyCommandHandlerWithSpecificMethod(), 'handle'],
             DummyCommandHandlerWithSpecificMethod::class.'::handle',
-        );
-        yield array(\Closure::fromCallable(function () {}), 'Closure');
-        yield array(\Closure::fromCallable(new DummyCommandHandler()), DummyCommandHandler::class.'::__invoke');
-        yield array(\Closure::bind(\Closure::fromCallable(function () {}), new \stdClass()), 'Closure');
-        yield array(new class() {
+        ];
+        yield [\Closure::fromCallable(function () {}), 'Closure'];
+        yield [\Closure::fromCallable(new DummyCommandHandler()), DummyCommandHandler::class.'::__invoke'];
+        yield [\Closure::bind(\Closure::fromCallable(function () {}), new \stdClass()), 'Closure'];
+        yield [new class() {
             public function __invoke()
             {
             }
-        }, 'class@anonymous%sHandledStampTest.php%s::__invoke');
+        }, 'class@anonymous%sHandledStampTest.php%s::__invoke'];
     }
 }
 
diff --git a/src/Symfony/Component/Messenger/Tests/Stamp/SerializerStampTest.php b/src/Symfony/Component/Messenger/Tests/Stamp/SerializerStampTest.php
index 1800d92123..6a65787803 100644
--- a/src/Symfony/Component/Messenger/Tests/Stamp/SerializerStampTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Stamp/SerializerStampTest.php
@@ -22,7 +22,7 @@ class SerializerStampTest extends TestCase
 {
     public function testSerializable()
     {
-        $stamp = new SerializerStamp(array(ObjectNormalizer::GROUPS => array('Default', 'Extra')));
+        $stamp = new SerializerStamp([ObjectNormalizer::GROUPS => ['Default', 'Extra']]);
 
         $this->assertEquals($stamp, unserialize(serialize($stamp)));
     }
diff --git a/src/Symfony/Component/Messenger/Tests/Stamp/ValidationStampTest.php b/src/Symfony/Component/Messenger/Tests/Stamp/ValidationStampTest.php
index cabcf526a3..e5af080acd 100644
--- a/src/Symfony/Component/Messenger/Tests/Stamp/ValidationStampTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Stamp/ValidationStampTest.php
@@ -22,16 +22,16 @@ class ValidationStampTest extends TestCase
 {
     public function testStamp()
     {
-        $stamp = new ValidationStamp($groups = array('Default', 'Extra'));
+        $stamp = new ValidationStamp($groups = ['Default', 'Extra']);
         $this->assertSame($groups, $stamp->getGroups());
 
-        $stamp = new ValidationStamp($groups = new GroupSequence(array('Default', 'Then')));
+        $stamp = new ValidationStamp($groups = new GroupSequence(['Default', 'Then']));
         $this->assertSame($groups, $stamp->getGroups());
     }
 
     public function testSerializable()
     {
-        $this->assertEquals($stamp = new ValidationStamp(array('Default', 'Extra')), unserialize(serialize($stamp)));
-        $this->assertEquals($stamp = new ValidationStamp(new GroupSequence(array('Default', 'Then'))), unserialize(serialize($stamp)));
+        $this->assertEquals($stamp = new ValidationStamp(['Default', 'Extra']), unserialize(serialize($stamp)));
+        $this->assertEquals($stamp = new ValidationStamp(new GroupSequence(['Default', 'Then'])), unserialize(serialize($stamp)));
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/TraceableMessageBusTest.php b/src/Symfony/Component/Messenger/Tests/TraceableMessageBusTest.php
index f4db01d855..23e47d28d0 100644
--- a/src/Symfony/Component/Messenger/Tests/TraceableMessageBusTest.php
+++ b/src/Symfony/Component/Messenger/Tests/TraceableMessageBusTest.php
@@ -31,15 +31,15 @@ class TraceableMessageBusTest extends TestCase
         $line = __LINE__ + 1;
         $traceableBus->dispatch($message);
         $this->assertCount(1, $tracedMessages = $traceableBus->getDispatchedMessages());
-        $this->assertArraySubset(array(
+        $this->assertArraySubset([
             'message' => $message,
-            'stamps' => array(),
-            'caller' => array(
+            'stamps' => [],
+            'caller' => [
                 'name' => 'TraceableMessageBusTest.php',
                 'file' => __FILE__,
                 'line' => $line,
-            ),
-        ), $tracedMessages[0], true);
+            ],
+        ], $tracedMessages[0], true);
     }
 
     public function testItTracesDispatchWithEnvelope()
@@ -54,15 +54,15 @@ class TraceableMessageBusTest extends TestCase
         $line = __LINE__ + 1;
         $traceableBus->dispatch($envelope);
         $this->assertCount(1, $tracedMessages = $traceableBus->getDispatchedMessages());
-        $this->assertArraySubset(array(
+        $this->assertArraySubset([
             'message' => $message,
-            'stamps' => array(array($stamp)),
-            'caller' => array(
+            'stamps' => [[$stamp]],
+            'caller' => [
                 'name' => 'TraceableMessageBusTest.php',
                 'file' => __FILE__,
                 'line' => $line,
-            ),
-        ), $tracedMessages[0], true);
+            ],
+        ], $tracedMessages[0], true);
     }
 
     public function testItTracesExceptions()
@@ -82,15 +82,15 @@ class TraceableMessageBusTest extends TestCase
         }
 
         $this->assertCount(1, $tracedMessages = $traceableBus->getDispatchedMessages());
-        $this->assertArraySubset(array(
+        $this->assertArraySubset([
             'message' => $message,
             'exception' => $exception,
-            'stamps' => array(),
-            'caller' => array(
+            'stamps' => [],
+            'caller' => [
                 'name' => 'TraceableMessageBusTest.php',
                 'file' => __FILE__,
                 'line' => $line,
-            ),
-        ), $tracedMessages[0], true);
+            ],
+        ], $tracedMessages[0], true);
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpExtIntegrationTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpExtIntegrationTest.php
index 511965cc01..e77253bb7e 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpExtIntegrationTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpExtIntegrationTest.php
@@ -41,7 +41,7 @@ class AmqpExtIntegrationTest extends TestCase
     public function testItSendsAndReceivesMessages()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
         $connection = Connection::fromDsn(getenv('MESSENGER_AMQP_DSN'));
@@ -67,7 +67,7 @@ class AmqpExtIntegrationTest extends TestCase
     public function testItReceivesSignals()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
         $connection = Connection::fromDsn(getenv('MESSENGER_AMQP_DSN'));
@@ -79,10 +79,10 @@ class AmqpExtIntegrationTest extends TestCase
 
         $amqpReadTimeout = 30;
         $dsn = getenv('MESSENGER_AMQP_DSN').'?read_timeout='.$amqpReadTimeout;
-        $process = new PhpProcess(file_get_contents(__DIR__.'/Fixtures/long_receiver.php'), null, array(
+        $process = new PhpProcess(file_get_contents(__DIR__.'/Fixtures/long_receiver.php'), null, [
             'COMPONENT_ROOT' => __DIR__.'/../../../',
             'DSN' => $dsn,
-        ));
+        ]);
 
         $process->start();
 
@@ -116,10 +116,10 @@ TXT
     public function testItSupportsTimeoutAndTicksNullMessagesToTheHandler()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
-        $connection = Connection::fromDsn(getenv('MESSENGER_AMQP_DSN'), array('read_timeout' => '1'));
+        $connection = Connection::fromDsn(getenv('MESSENGER_AMQP_DSN'), ['read_timeout' => '1']);
         $connection->setup();
         $connection->queue()->purge();
 
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpReceiverTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpReceiverTest.php
index 5c7ec02e57..23f1c8b2de 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpReceiverTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpReceiverTest.php
@@ -30,14 +30,14 @@ class AmqpReceiverTest extends TestCase
     public function testItSendTheDecodedMessageToTheHandlerAndAcknowledgeIt()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
         $envelope = $this->getMockBuilder(\AMQPEnvelope::class)->getMock();
         $envelope->method('getBody')->willReturn('{"message": "Hi"}');
-        $envelope->method('getHeaders')->willReturn(array(
+        $envelope->method('getHeaders')->willReturn([
             'type' => DummyMessage::class,
-        ));
+        ]);
 
         $connection = $this->getMockBuilder(Connection::class)->disableOriginalConstructor()->getMock();
         $connection->method('get')->willReturn($envelope);
@@ -57,14 +57,14 @@ class AmqpReceiverTest extends TestCase
     public function testItNonAcknowledgeTheMessageIfAnExceptionHappened()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
         $envelope = $this->getMockBuilder(\AMQPEnvelope::class)->getMock();
         $envelope->method('getBody')->willReturn('{"message": "Hi"}');
-        $envelope->method('getHeaders')->willReturn(array(
+        $envelope->method('getHeaders')->willReturn([
             'type' => DummyMessage::class,
-        ));
+        ]);
 
         $connection = $this->getMockBuilder(Connection::class)->disableOriginalConstructor()->getMock();
         $connection->method('get')->willReturn($envelope);
@@ -83,14 +83,14 @@ class AmqpReceiverTest extends TestCase
     public function testItRejectsTheMessageIfTheExceptionIsARejectMessageExceptionInterface()
     {
         $serializer = new Serializer(
-            new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+            new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
         );
 
         $envelope = $this->getMockBuilder(\AMQPEnvelope::class)->getMock();
         $envelope->method('getBody')->willReturn('{"message": "Hi"}');
-        $envelope->method('getHeaders')->willReturn(array(
+        $envelope->method('getHeaders')->willReturn([
             'type' => DummyMessage::class,
-        ));
+        ]);
 
         $connection = $this->getMockBuilder(Connection::class)->disableOriginalConstructor()->getMock();
         $connection->method('get')->willReturn($envelope);
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpSenderTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpSenderTest.php
index 398f009292..caef14c9e2 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpSenderTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpSenderTest.php
@@ -26,7 +26,7 @@ class AmqpSenderTest extends TestCase
     public function testItSendsTheEncodedMessage()
     {
         $envelope = new Envelope(new DummyMessage('Oy'));
-        $encoded = array('body' => '...', 'headers' => array('type' => DummyMessage::class));
+        $encoded = ['body' => '...', 'headers' => ['type' => DummyMessage::class]];
 
         $serializer = $this->getMockBuilder(SerializerInterface::class)->getMock();
         $serializer->method('encode')->with($envelope)->willReturnOnConsecutiveCalls($encoded);
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportFactoryTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportFactoryTest.php
index c36cc3eafd..8dc555fa89 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportFactoryTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportFactoryTest.php
@@ -26,9 +26,9 @@ class AmqpTransportFactoryTest extends TestCase
             true
         );
 
-        $this->assertTrue($factory->supports('amqp://localhost', array()));
-        $this->assertFalse($factory->supports('sqs://localhost', array()));
-        $this->assertFalse($factory->supports('invalid-dsn', array()));
+        $this->assertTrue($factory->supports('amqp://localhost', []));
+        $this->assertFalse($factory->supports('sqs://localhost', []));
+        $this->assertFalse($factory->supports('invalid-dsn', []));
     }
 
     public function testItCreatesTheTransport()
@@ -38,8 +38,8 @@ class AmqpTransportFactoryTest extends TestCase
             true
         );
 
-        $expectedTransport = new AmqpTransport(Connection::fromDsn('amqp://localhost', array('foo' => 'bar'), true), $serializer);
+        $expectedTransport = new AmqpTransport(Connection::fromDsn('amqp://localhost', ['foo' => 'bar'], true), $serializer);
 
-        $this->assertEquals($expectedTransport, $factory->createTransport('amqp://localhost', array('foo' => 'bar')));
+        $this->assertEquals($expectedTransport, $factory->createTransport('amqp://localhost', ['foo' => 'bar']));
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportTest.php
index 589a764c1a..c343c29226 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/AmqpTransportTest.php
@@ -42,9 +42,9 @@ class AmqpTransportTest extends TestCase
 
         $amqpEnvelope = $this->getMockBuilder(\AMQPEnvelope::class)->getMock();
         $amqpEnvelope->method('getBody')->willReturn('body');
-        $amqpEnvelope->method('getHeaders')->willReturn(array('my' => 'header'));
+        $amqpEnvelope->method('getHeaders')->willReturn(['my' => 'header']);
 
-        $serializer->method('decode')->with(array('body' => 'body', 'headers' => array('my' => 'header')))->willReturn(new Envelope($decodedMessage));
+        $serializer->method('decode')->with(['body' => 'body', 'headers' => ['my' => 'header']])->willReturn(new Envelope($decodedMessage));
         $connection->method('get')->willReturn($amqpEnvelope);
 
         $transport->receive(function (Envelope $envelope) use ($transport, $decodedMessage) {
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/ConnectionTest.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/ConnectionTest.php
index 511f8fe3c4..cd0fc3999e 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/ConnectionTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/ConnectionTest.php
@@ -32,15 +32,15 @@ class ConnectionTest extends TestCase
     public function testItGetsParametersFromTheDsn()
     {
         $this->assertEquals(
-            new Connection(array(
+            new Connection([
                 'host' => 'localhost',
                 'port' => 5672,
                 'vhost' => '/',
-            ), array(
+            ], [
                 'name' => 'messages',
-            ), array(
+            ], [
                 'name' => 'messages',
-            )),
+            ]),
             Connection::fromDsn('amqp://localhost/%2f/messages')
         );
     }
@@ -48,17 +48,17 @@ class ConnectionTest extends TestCase
     public function testOverrideOptionsViaQueryParameters()
     {
         $this->assertEquals(
-            new Connection(array(
+            new Connection([
                 'host' => 'redis',
                 'port' => 1234,
                 'vhost' => '/',
                 'login' => 'guest',
                 'password' => 'password',
-            ), array(
+            ], [
                 'name' => 'exchangeName',
-            ), array(
+            ], [
                 'name' => 'queue',
-            )),
+            ]),
             Connection::fromDsn('amqp://guest:password@redis:1234/%2f/queue?exchange[name]=exchangeName')
         );
     }
@@ -66,22 +66,22 @@ class ConnectionTest extends TestCase
     public function testOptionsAreTakenIntoAccountAndOverwrittenByDsn()
     {
         $this->assertEquals(
-            new Connection(array(
+            new Connection([
                 'host' => 'redis',
                 'port' => 1234,
                 'vhost' => '/',
                 'login' => 'guest',
                 'password' => 'password',
                 'persistent' => 'true',
-            ), array(
+            ], [
                 'name' => 'exchangeName',
-            ), array(
+            ], [
                 'name' => 'queueName',
-            )),
-            Connection::fromDsn('amqp://guest:password@redis:1234/%2f/queue?exchange[name]=exchangeName&queue[name]=queueName', array(
+            ]),
+            Connection::fromDsn('amqp://guest:password@redis:1234/%2f/queue?exchange[name]=exchangeName&queue[name]=queueName', [
                 'persistent' => 'true',
-                'exchange' => array('name' => 'toBeOverwritten'),
-            ))
+                'exchange' => ['name' => 'toBeOverwritten'],
+            ])
         );
     }
 
@@ -94,27 +94,27 @@ class ConnectionTest extends TestCase
             $amqpExchange = $this->getMockBuilder(\AMQPExchange::class)->disableOriginalConstructor()->getMock()
         );
 
-        $amqpQueue->expects($this->once())->method('setArguments')->with(array(
+        $amqpQueue->expects($this->once())->method('setArguments')->with([
             'x-dead-letter-exchange' => 'dead-exchange',
             'x-message-ttl' => '1200',
-        ));
+        ]);
 
-        $amqpExchange->expects($this->once())->method('setArguments')->with(array(
+        $amqpExchange->expects($this->once())->method('setArguments')->with([
             'alternate-exchange' => 'alternate',
-        ));
+        ]);
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[arguments][x-dead-letter-exchange]=dead-exchange', array(
-            'queue' => array(
-                'arguments' => array(
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[arguments][x-dead-letter-exchange]=dead-exchange', [
+            'queue' => [
+                'arguments' => [
                     'x-message-ttl' => '1200',
-                ),
-            ),
-            'exchange' => array(
-                'arguments' => array(
+                ],
+            ],
+            'exchange' => [
+                'arguments' => [
                     'alternate-exchange' => 'alternate',
-                ),
-            ),
-        ), true, $factory);
+                ],
+            ],
+        ], true, $factory);
         $connection->publish('body');
     }
 
@@ -129,7 +129,7 @@ class ConnectionTest extends TestCase
 
         $amqpConnection->expects($this->once())->method('connect');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages', array(), false, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages', [], false, $factory);
         $connection->publish('body');
     }
 
@@ -144,7 +144,7 @@ class ConnectionTest extends TestCase
 
         $amqpConnection->expects($this->once())->method('pconnect');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?persistent=true', array(), false, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?persistent=true', [], false, $factory);
         $connection->publish('body');
     }
 
@@ -162,7 +162,7 @@ class ConnectionTest extends TestCase
         $amqpQueue->expects($this->once())->method('declareQueue');
         $amqpQueue->expects($this->once())->method('bind')->with('exchange_name', 'my_key');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', array(), true, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', [], true, $factory);
         $connection->publish('body');
     }
 
@@ -180,13 +180,13 @@ class ConnectionTest extends TestCase
         $amqpQueue->expects($this->never())->method('declareQueue');
         $amqpQueue->expects($this->never())->method('bind');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', array('auto-setup' => 'false'), true, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', ['auto-setup' => 'false'], true, $factory);
         $connection->publish('body');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', array('auto-setup' => false), true, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key', ['auto-setup' => false], true, $factory);
         $connection->publish('body');
 
-        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key&auto-setup=false', array(), true, $factory);
+        $connection = Connection::fromDsn('amqp://localhost/%2f/messages?queue[routing_key]=my_key&auto-setup=false', [], true, $factory);
         $connection->publish('body');
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/Fixtures/long_receiver.php b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/Fixtures/long_receiver.php
index a986b6592a..a7d4d8dcd7 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/Fixtures/long_receiver.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/AmqpExt/Fixtures/long_receiver.php
@@ -23,7 +23,7 @@ use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
 $serializer = new Serializer(
-    new SerializerComponent\Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()))
+    new SerializerComponent\Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()])
 );
 
 $connection = Connection::fromDsn(getenv('DSN'));
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiverTest.php b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiverTest.php
index 031eaa8b38..27314e7550 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiverTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiverTest.php
@@ -30,7 +30,7 @@ class StopWhenMemoryUsageIsExceededReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -51,9 +51,9 @@ class StopWhenMemoryUsageIsExceededReceiverTest extends TestCase
 
     public function memoryProvider()
     {
-        yield array(2048, 1024, true);
-        yield array(1024, 1024, false);
-        yield array(1024, 2048, false);
+        yield [2048, 1024, true];
+        yield [1024, 1024, false];
+        yield [1024, 2048, false];
     }
 
     public function testReceiverLogsMemoryExceededWhenLoggerIsGiven()
@@ -63,7 +63,7 @@ class StopWhenMemoryUsageIsExceededReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -72,7 +72,7 @@ class StopWhenMemoryUsageIsExceededReceiverTest extends TestCase
 
         $logger = $this->createMock(LoggerInterface::class);
         $logger->expects($this->once())->method('info')
-            ->with('Receiver stopped due to memory limit of {limit} exceeded', array('limit' => 64 * 1024 * 1024));
+            ->with('Receiver stopped due to memory limit of {limit} exceeded', ['limit' => 64 * 1024 * 1024]);
 
         $memoryResolver = function () {
             return 70 * 1024 * 1024;
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMessageCountIsExceededReceiverTest.php b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMessageCountIsExceededReceiverTest.php
index 9848972a7d..1a303728a9 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMessageCountIsExceededReceiverTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenMessageCountIsExceededReceiverTest.php
@@ -32,7 +32,7 @@ class StopWhenMessageCountIsExceededReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -49,10 +49,10 @@ class StopWhenMessageCountIsExceededReceiverTest extends TestCase
 
     public function countProvider()
     {
-        yield array(1, true);
-        yield array(2, true);
-        yield array(3, true);
-        yield array(4, false);
+        yield [1, true];
+        yield [2, true];
+        yield [3, true];
+        yield [4, false];
     }
 
     public function testReceiverDoesntIncreaseItsCounterWhenReceiveNullMessage()
@@ -65,7 +65,7 @@ class StopWhenMessageCountIsExceededReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -83,7 +83,7 @@ class StopWhenMessageCountIsExceededReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -94,7 +94,7 @@ class StopWhenMessageCountIsExceededReceiverTest extends TestCase
         $logger->expects($this->once())->method('info')
             ->with(
                 $this->equalTo('Receiver stopped due to maximum count of {count} exceeded'),
-                $this->equalTo(array('count' => 1))
+                $this->equalTo(['count' => 1])
             );
 
         $maximumCountReceiver = new StopWhenMessageCountIsExceededReceiver($decoratedReceiver, 1, $logger);
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenTimeLimitIsReachedReceiverTest.php b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenTimeLimitIsReachedReceiverTest.php
index ed6e86bedd..472703fe6f 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenTimeLimitIsReachedReceiverTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/Receiver/StopWhenTimeLimitIsReachedReceiverTest.php
@@ -30,7 +30,7 @@ class StopWhenTimeLimitIsReachedReceiverTest extends TestCase
         };
 
         $decoratedReceiver = $this->getMockBuilder(CallbackReceiver::class)
-            ->setConstructorArgs(array($callable))
+            ->setConstructorArgs([$callable])
             ->enableProxyingToOriginalMethods()
             ->getMock();
 
@@ -39,7 +39,7 @@ class StopWhenTimeLimitIsReachedReceiverTest extends TestCase
 
         $logger = $this->createMock(LoggerInterface::class);
         $logger->expects($this->once())->method('info')
-            ->with('Receiver stopped due to time limit of {timeLimit}s reached', array('timeLimit' => 1));
+            ->with('Receiver stopped due to time limit of {timeLimit}s reached', ['timeLimit' => 1]);
 
         $timeoutReceiver = new StopWhenTimeLimitIsReachedReceiver($decoratedReceiver, 1, $logger);
         $timeoutReceiver->receive(function () {
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/Sender/SendersLocatorTest.php b/src/Symfony/Component/Messenger/Tests/Transport/Sender/SendersLocatorTest.php
index e693cee53a..1de28332b3 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/Sender/SendersLocatorTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/Sender/SendersLocatorTest.php
@@ -23,21 +23,21 @@ class SendersLocatorTest extends TestCase
     public function testItReturnsTheSenderBasedOnTheMessageClass()
     {
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
-        $locator = new SendersLocator(array(
-            DummyMessage::class => array($sender),
-        ));
+        $locator = new SendersLocator([
+            DummyMessage::class => [$sender],
+        ]);
 
-        $this->assertSame(array($sender), iterator_to_array($locator->getSenders(new Envelope(new DummyMessage('a')))));
-        $this->assertSame(array(), iterator_to_array($locator->getSenders(new Envelope(new SecondMessage()))));
+        $this->assertSame([$sender], iterator_to_array($locator->getSenders(new Envelope(new DummyMessage('a')))));
+        $this->assertSame([], iterator_to_array($locator->getSenders(new Envelope(new SecondMessage()))));
     }
 
     public function testItYieldsProvidedSenderAliasAsKey()
     {
         $sender = $this->getMockBuilder(SenderInterface::class)->getMock();
-        $locator = new SendersLocator(array(
-            DummyMessage::class => array('dummy' => $sender),
-        ));
+        $locator = new SendersLocator([
+            DummyMessage::class => ['dummy' => $sender],
+        ]);
 
-        $this->assertSame(array('dummy' => $sender), iterator_to_array($locator->getSenders(new Envelope(new DummyMessage('a')))));
+        $this->assertSame(['dummy' => $sender], iterator_to_array($locator->getSenders(new Envelope(new DummyMessage('a')))));
     }
 }
diff --git a/src/Symfony/Component/Messenger/Tests/Transport/Serialization/SerializerTest.php b/src/Symfony/Component/Messenger/Tests/Transport/Serialization/SerializerTest.php
index a38d8b4842..d68103f7ca 100644
--- a/src/Symfony/Component/Messenger/Tests/Transport/Serialization/SerializerTest.php
+++ b/src/Symfony/Component/Messenger/Tests/Transport/Serialization/SerializerTest.php
@@ -36,8 +36,8 @@ class SerializerTest extends TestCase
         $serializer = new Serializer();
 
         $envelope = (new Envelope(new DummyMessage('Hello')))
-            ->with(new SerializerStamp(array(ObjectNormalizer::GROUPS => array('foo'))))
-            ->with(new ValidationStamp(array('foo', 'bar')))
+            ->with(new SerializerStamp([ObjectNormalizer::GROUPS => ['foo']]))
+            ->with(new ValidationStamp(['foo', 'bar']))
         ;
 
         $this->assertEquals($envelope, $serializer->decode($serializer->encode($envelope)));
@@ -60,10 +60,10 @@ class SerializerTest extends TestCase
         $message = new DummyMessage('Foo');
 
         $serializer = $this->getMockBuilder(SerializerComponent\SerializerInterface::class)->getMock();
-        $serializer->expects($this->once())->method('serialize')->with($message, 'csv', array('foo' => 'bar'))->willReturn('Yay');
-        $serializer->expects($this->once())->method('deserialize')->with('Yay', DummyMessage::class, 'csv', array('foo' => 'bar'))->willReturn($message);
+        $serializer->expects($this->once())->method('serialize')->with($message, 'csv', ['foo' => 'bar'])->willReturn('Yay');
+        $serializer->expects($this->once())->method('deserialize')->with('Yay', DummyMessage::class, 'csv', ['foo' => 'bar'])->willReturn($message);
 
-        $encoder = new Serializer($serializer, 'csv', array('foo' => 'bar'));
+        $encoder = new Serializer($serializer, 'csv', ['foo' => 'bar']);
 
         $encoded = $encoder->encode(new Envelope($message));
         $decoded = $encoder->decode($encoded);
@@ -77,8 +77,8 @@ class SerializerTest extends TestCase
         $serializer = new Serializer();
 
         $envelope = (new Envelope(new DummyMessage('Hello')))
-            ->with($serializerStamp = new SerializerStamp(array(ObjectNormalizer::GROUPS => array('foo'))))
-            ->with($validationStamp = new ValidationStamp(array('foo', 'bar')))
+            ->with($serializerStamp = new SerializerStamp([ObjectNormalizer::GROUPS => ['foo']]))
+            ->with($validationStamp = new ValidationStamp(['foo', 'bar']))
         ;
 
         $encoded = $serializer->encode($envelope);
diff --git a/src/Symfony/Component/Messenger/TraceableMessageBus.php b/src/Symfony/Component/Messenger/TraceableMessageBus.php
index fdc6ae08f7..1d910d4540 100644
--- a/src/Symfony/Component/Messenger/TraceableMessageBus.php
+++ b/src/Symfony/Component/Messenger/TraceableMessageBus.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\Messenger;
 class TraceableMessageBus implements MessageBusInterface
 {
     private $decoratedBus;
-    private $dispatchedMessages = array();
+    private $dispatchedMessages = [];
 
     public function __construct(MessageBusInterface $decoratedBus)
     {
@@ -32,12 +32,12 @@ class TraceableMessageBus implements MessageBusInterface
     public function dispatch($message): Envelope
     {
         $envelope = $message instanceof Envelope ? $message : new Envelope($message);
-        $context = array(
+        $context = [
             'stamps' => array_values($envelope->all()),
             'message' => $envelope->getMessage(),
             'caller' => $this->getCaller(),
             'callTime' => microtime(true),
-        );
+        ];
 
         try {
             return $this->decoratedBus->dispatch($message);
@@ -57,7 +57,7 @@ class TraceableMessageBus implements MessageBusInterface
 
     public function reset()
     {
-        $this->dispatchedMessages = array();
+        $this->dispatchedMessages = [];
     }
 
     private function getCaller(): array
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
index ad02b80d3b..7ed1fae405 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/AmqpReceiver.php
@@ -54,10 +54,10 @@ class AmqpReceiver implements ReceiverInterface
             }
 
             try {
-                $handler($this->serializer->decode(array(
+                $handler($this->serializer->decode([
                     'body' => $AMQPEnvelope->getBody(),
                     'headers' => $AMQPEnvelope->getHeaders(),
-                )));
+                ]));
 
                 $this->connection->ack($AMQPEnvelope);
             } catch (RejectMessageExceptionInterface $e) {
diff --git a/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php b/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
index 0281eb7e7c..2f09d727c9 100644
--- a/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
+++ b/src/Symfony/Component/Messenger/Transport/AmqpExt/Connection.php
@@ -54,24 +54,24 @@ class Connection
         $this->amqpFactory = $amqpFactory ?: new AmqpFactory();
     }
 
-    public static function fromDsn(string $dsn, array $options = array(), bool $debug = false, AmqpFactory $amqpFactory = null): self
+    public static function fromDsn(string $dsn, array $options = [], bool $debug = false, AmqpFactory $amqpFactory = null): self
     {
         if (false === $parsedUrl = parse_url($dsn)) {
             throw new InvalidArgumentException(sprintf('The given AMQP DSN "%s" is invalid.', $dsn));
         }
 
-        $pathParts = isset($parsedUrl['path']) ? explode('/', trim($parsedUrl['path'], '/')) : array();
-        $amqpOptions = array_replace_recursive(array(
+        $pathParts = isset($parsedUrl['path']) ? explode('/', trim($parsedUrl['path'], '/')) : [];
+        $amqpOptions = array_replace_recursive([
             'host' => $parsedUrl['host'] ?? 'localhost',
             'port' => $parsedUrl['port'] ?? 5672,
             'vhost' => isset($pathParts[0]) ? urldecode($pathParts[0]) : '/',
-            'queue' => array(
+            'queue' => [
                 'name' => $queueName = $pathParts[1] ?? 'messages',
-            ),
-            'exchange' => array(
+            ],
+            'exchange' => [
                 'name' => $queueName,
-            ),
-        ), $options);
+            ],
+        ], $options);
 
         if (isset($parsedUrl['user'])) {
             $amqpOptions['login'] = $parsedUrl['user'];
@@ -98,13 +98,13 @@ class Connection
     /**
      * @throws \AMQPException
      */
-    public function publish(string $body, array $headers = array()): void
+    public function publish(string $body, array $headers = []): void
     {
         if ($this->debug && $this->shouldSetup()) {
             $this->setup();
         }
 
-        $this->exchange()->publish($body, $this->queueConfiguration['routing_key'] ?? null, AMQP_NOPARAM, array('headers' => $headers));
+        $this->exchange()->publish($body, $this->queueConfiguration['routing_key'] ?? null, AMQP_NOPARAM, ['headers' => $headers]);
     }
 
     /**
@@ -224,6 +224,6 @@ class Connection
 
     private function shouldSetup(): bool
     {
-        return !array_key_exists('auto-setup', $this->connectionCredentials) || !\in_array($this->connectionCredentials['auto-setup'], array(false, 'false'), true);
+        return !array_key_exists('auto-setup', $this->connectionCredentials) || !\in_array($this->connectionCredentials['auto-setup'], [false, 'false'], true);
     }
 }
diff --git a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiver.php b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiver.php
index 7afa4723d2..41e0df22bc 100644
--- a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiver.php
+++ b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMemoryUsageIsExceededReceiver.php
@@ -45,7 +45,7 @@ class StopWhenMemoryUsageIsExceededReceiver implements ReceiverInterface
             if ($memoryResolver() > $this->memoryLimit) {
                 $this->stop();
                 if (null !== $this->logger) {
-                    $this->logger->info('Receiver stopped due to memory limit of {limit} exceeded', array('limit' => $this->memoryLimit));
+                    $this->logger->info('Receiver stopped due to memory limit of {limit} exceeded', ['limit' => $this->memoryLimit]);
                 }
             }
         });
diff --git a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMessageCountIsExceededReceiver.php b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMessageCountIsExceededReceiver.php
index 1794c2539f..8d36a15f8e 100644
--- a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMessageCountIsExceededReceiver.php
+++ b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenMessageCountIsExceededReceiver.php
@@ -42,7 +42,7 @@ class StopWhenMessageCountIsExceededReceiver implements ReceiverInterface
             if (null !== $envelope && ++$receivedMessages >= $this->maximumNumberOfMessages) {
                 $this->stop();
                 if (null !== $this->logger) {
-                    $this->logger->info('Receiver stopped due to maximum count of {count} exceeded', array('count' => $this->maximumNumberOfMessages));
+                    $this->logger->info('Receiver stopped due to maximum count of {count} exceeded', ['count' => $this->maximumNumberOfMessages]);
                 }
             }
         });
diff --git a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenTimeLimitIsReachedReceiver.php b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenTimeLimitIsReachedReceiver.php
index 40cc3d57f7..b9bc24a16c 100644
--- a/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenTimeLimitIsReachedReceiver.php
+++ b/src/Symfony/Component/Messenger/Transport/Receiver/StopWhenTimeLimitIsReachedReceiver.php
@@ -43,7 +43,7 @@ class StopWhenTimeLimitIsReachedReceiver implements ReceiverInterface
             if ($endTime < microtime(true)) {
                 $this->stop();
                 if (null !== $this->logger) {
-                    $this->logger->info('Receiver stopped due to time limit of {timeLimit}s reached', array('timeLimit' => $this->timeLimitInSeconds));
+                    $this->logger->info('Receiver stopped due to time limit of {timeLimit}s reached', ['timeLimit' => $this->timeLimitInSeconds]);
                 }
             }
         });
diff --git a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
index 47f64a6d14..60dde8fb53 100644
--- a/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
+++ b/src/Symfony/Component/Messenger/Transport/Sender/SendersLocator.php
@@ -30,7 +30,7 @@ class SendersLocator implements SendersLocatorInterface
      * @param SenderInterface[][] $senders
      * @param bool[]              $sendAndHandle
      */
-    public function __construct(array $senders, array $sendAndHandle = array())
+    public function __construct(array $senders, array $sendAndHandle = [])
     {
         $this->senders = $senders;
         $this->sendAndHandle = $sendAndHandle;
@@ -43,10 +43,10 @@ class SendersLocator implements SendersLocatorInterface
     {
         $handle = false;
         $sender = null;
-        $seen = array();
+        $seen = [];
 
         foreach (HandlersLocator::listTypes($envelope) as $type) {
-            foreach ($this->senders[$type] ?? array() as $alias => $sender) {
+            foreach ($this->senders[$type] ?? [] as $alias => $sender) {
                 if (!\in_array($sender, $seen, true)) {
                     yield $alias => $seen[] = $sender;
                 }
diff --git a/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php b/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
index 22c01debea..3f0979bcef 100644
--- a/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
+++ b/src/Symfony/Component/Messenger/Transport/Serialization/Serializer.php
@@ -35,7 +35,7 @@ class Serializer implements SerializerInterface
     private $format;
     private $context;
 
-    public function __construct(SymfonySerializerInterface $serializer = null, string $format = 'json', array $context = array())
+    public function __construct(SymfonySerializerInterface $serializer = null, string $format = 'json', array $context = [])
     {
         $this->serializer = $serializer ?? self::create()->serializer;
         $this->format = $format;
@@ -48,8 +48,8 @@ class Serializer implements SerializerInterface
             throw new LogicException(sprintf('The default Messenger Serializer requires Symfony\'s Serializer component. Try running "composer require symfony/serializer".'));
         }
 
-        $encoders = array(new XmlEncoder(), new JsonEncoder());
-        $normalizers = array(new ArrayDenormalizer(), new ObjectNormalizer());
+        $encoders = [new XmlEncoder(), new JsonEncoder()];
+        $normalizers = [new ArrayDenormalizer(), new ObjectNormalizer()];
         $serializer = new SymfonySerializer($normalizers, $encoders);
 
         return new self($serializer);
@@ -91,17 +91,17 @@ class Serializer implements SerializerInterface
             $context = $serializerStamp->getContext() + $context;
         }
 
-        $headers = array('type' => \get_class($envelope->getMessage())) + $this->encodeStamps($envelope);
+        $headers = ['type' => \get_class($envelope->getMessage())] + $this->encodeStamps($envelope);
 
-        return array(
+        return [
             'body' => $this->serializer->serialize($envelope->getMessage(), $this->format, $context),
             'headers' => $headers,
-        );
+        ];
     }
 
     private function decodeStamps(array $encodedEnvelope): array
     {
-        $stamps = array();
+        $stamps = [];
         foreach ($encodedEnvelope['headers'] as $name => $value) {
             if (0 !== strpos($name, self::STAMP_HEADER_PREFIX)) {
                 continue;
@@ -119,10 +119,10 @@ class Serializer implements SerializerInterface
     private function encodeStamps(Envelope $envelope): array
     {
         if (!$allStamps = $envelope->all()) {
-            return array();
+            return [];
         }
 
-        $headers = array();
+        $headers = [];
         foreach ($allStamps as $class => $stamps) {
             $headers[self::STAMP_HEADER_PREFIX.$class] = $this->serializer->serialize($stamps, $this->format, $this->context);
         }
diff --git a/src/Symfony/Component/OptionsResolver/OptionsResolver.php b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
index 5d238f509e..6532fe0a0a 100644
--- a/src/Symfony/Component/OptionsResolver/OptionsResolver.php
+++ b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
@@ -30,68 +30,68 @@ class OptionsResolver implements Options
     /**
      * The names of all defined options.
      */
-    private $defined = array();
+    private $defined = [];
 
     /**
      * The default option values.
      */
-    private $defaults = array();
+    private $defaults = [];
 
     /**
      * A list of closure for nested options.
      *
      * @var \Closure[][]
      */
-    private $nested = array();
+    private $nested = [];
 
     /**
      * The names of required options.
      */
-    private $required = array();
+    private $required = [];
 
     /**
      * The resolved option values.
      */
-    private $resolved = array();
+    private $resolved = [];
 
     /**
      * A list of normalizer closures.
      *
      * @var \Closure[]
      */
-    private $normalizers = array();
+    private $normalizers = [];
 
     /**
      * A list of accepted values for each option.
      */
-    private $allowedValues = array();
+    private $allowedValues = [];
 
     /**
      * A list of accepted types for each option.
      */
-    private $allowedTypes = array();
+    private $allowedTypes = [];
 
     /**
      * A list of closures for evaluating lazy options.
      */
-    private $lazy = array();
+    private $lazy = [];
 
     /**
      * A list of lazy options whose closure is currently being called.
      *
      * This list helps detecting circular dependencies between lazy options.
      */
-    private $calling = array();
+    private $calling = [];
 
     /**
      * A list of deprecated options.
      */
-    private $deprecated = array();
+    private $deprecated = [];
 
     /**
      * The list of options provided by the user.
      */
-    private $given = array();
+    private $given = [];
 
     /**
      * Whether the instance is locked for reading.
@@ -103,11 +103,11 @@ class OptionsResolver implements Options
      */
     private $locked = false;
 
-    private static $typeAliases = array(
+    private static $typeAliases = [
         'boolean' => 'bool',
         'integer' => 'int',
         'double' => 'float',
-    );
+    ];
 
     /**
      * Sets the default value of a given option.
@@ -146,7 +146,7 @@ class OptionsResolver implements Options
      * following signature:
      *
      *     $options->setDefault('database', function (OptionsResolver $resolver) {
-     *         $resolver->setDefined(array('dbname', 'host', 'port', 'user', 'pass'));
+     *         $resolver->setDefined(['dbname', 'host', 'port', 'user', 'pass']);
      *     }
      *
      * To get access to the parent options, add a second argument to the closure's
@@ -186,7 +186,7 @@ class OptionsResolver implements Options
 
                 // Ignore previous lazy options if the closure has no second parameter
                 if (!isset($this->lazy[$option]) || !isset($params[1])) {
-                    $this->lazy[$option] = array();
+                    $this->lazy[$option] = [];
                 }
 
                 // Store closure for later evaluation
@@ -202,7 +202,7 @@ class OptionsResolver implements Options
             if (isset($params[0]) && null !== ($class = $params[0]->getClass()) && self::class === $class->name && (!isset($params[1]) || (null !== ($class = $params[1]->getClass()) && Options::class === $class->name))) {
                 // Store closure for later evaluation
                 $this->nested[$option][] = $value;
-                $this->defaults[$option] = array();
+                $this->defaults[$option] = [];
                 $this->defined[$option] = true;
 
                 // Make sure the option is processed and is not lazy anymore
@@ -523,7 +523,7 @@ class OptionsResolver implements Options
             throw new UndefinedOptionsException(sprintf('The option "%s" does not exist. Defined options are: "%s".', $option, implode('", "', array_keys($this->defined))));
         }
 
-        $this->allowedValues[$option] = \is_array($allowedValues) ? $allowedValues : array($allowedValues);
+        $this->allowedValues[$option] = \is_array($allowedValues) ? $allowedValues : [$allowedValues];
 
         // Make sure the option is processed
         unset($this->resolved[$option]);
@@ -565,7 +565,7 @@ class OptionsResolver implements Options
         }
 
         if (!\is_array($allowedValues)) {
-            $allowedValues = array($allowedValues);
+            $allowedValues = [$allowedValues];
         }
 
         if (!isset($this->allowedValues[$option])) {
@@ -690,16 +690,16 @@ class OptionsResolver implements Options
             throw new AccessException('Options cannot be cleared from a lazy option or normalizer.');
         }
 
-        $this->defined = array();
-        $this->defaults = array();
-        $this->nested = array();
-        $this->required = array();
-        $this->resolved = array();
-        $this->lazy = array();
-        $this->normalizers = array();
-        $this->allowedTypes = array();
-        $this->allowedValues = array();
-        $this->deprecated = array();
+        $this->defined = [];
+        $this->defaults = [];
+        $this->nested = [];
+        $this->required = [];
+        $this->resolved = [];
+        $this->lazy = [];
+        $this->normalizers = [];
+        $this->allowedTypes = [];
+        $this->allowedValues = [];
+        $this->deprecated = [];
 
         return $this;
     }
@@ -728,7 +728,7 @@ class OptionsResolver implements Options
      * @throws NoSuchOptionException     If a lazy option reads an unavailable option
      * @throws AccessException           If called from a lazy option or normalizer
      */
-    public function resolve(array $options = array())
+    public function resolve(array $options = [])
     {
         if ($this->locked) {
             throw new AccessException('Options cannot be resolved from a lazy option or normalizer.');
@@ -802,7 +802,7 @@ class OptionsResolver implements Options
         // Shortcut for resolved options
         if (isset($this->resolved[$option]) || array_key_exists($option, $this->resolved)) {
             if ($triggerDeprecation && isset($this->deprecated[$option]) && (isset($this->given[$option]) || $this->calling) && \is_string($this->deprecated[$option])) {
-                @trigger_error(strtr($this->deprecated[$option], array('%name%' => $option)), E_USER_DEPRECATED);
+                @trigger_error(strtr($this->deprecated[$option], ['%name%' => $option]), E_USER_DEPRECATED);
             }
 
             return $this->resolved[$option];
@@ -869,7 +869,7 @@ class OptionsResolver implements Options
         // Validate the type of the resolved option
         if (isset($this->allowedTypes[$option])) {
             $valid = false;
-            $invalidTypes = array();
+            $invalidTypes = [];
 
             foreach ($this->allowedTypes[$option] as $type) {
                 $type = self::$typeAliases[$type] ?? $type;
@@ -893,7 +893,7 @@ class OptionsResolver implements Options
         // Validate the value of the resolved option
         if (isset($this->allowedValues[$option])) {
             $success = false;
-            $printableAllowedValues = array();
+            $printableAllowedValues = [];
 
             foreach ($this->allowedValues[$option] as $allowedValue) {
                 if ($allowedValue instanceof \Closure) {
@@ -954,7 +954,7 @@ class OptionsResolver implements Options
             }
 
             if ('' !== $deprecationMessage) {
-                @trigger_error(strtr($deprecationMessage, array('%name%' => $option)), E_USER_DEPRECATED);
+                @trigger_error(strtr($deprecationMessage, ['%name%' => $option]), E_USER_DEPRECATED);
             }
         }
 
diff --git a/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php b/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
index 4bdce6f807..c6615573cd 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/Debug/OptionsResolverIntrospectorTest.php
@@ -64,7 +64,7 @@ class OptionsResolverIntrospectorTest extends TestCase
     public function testGetLazyClosures()
     {
         $resolver = new OptionsResolver();
-        $closures = array();
+        $closures = [];
         $resolver->setDefault($option = 'foo', $closures[] = function (Options $options) {});
 
         $debug = new OptionsResolverIntrospector($resolver);
@@ -100,7 +100,7 @@ class OptionsResolverIntrospectorTest extends TestCase
     {
         $resolver = new OptionsResolver();
         $resolver->setDefined($option = 'foo');
-        $resolver->setAllowedTypes($option = 'foo', $allowedTypes = array('string', 'bool'));
+        $resolver->setAllowedTypes($option = 'foo', $allowedTypes = ['string', 'bool']);
 
         $debug = new OptionsResolverIntrospector($resolver);
         $this->assertSame($allowedTypes, $debug->getAllowedTypes($option));
@@ -135,7 +135,7 @@ class OptionsResolverIntrospectorTest extends TestCase
     {
         $resolver = new OptionsResolver();
         $resolver->setDefined($option = 'foo');
-        $resolver->setAllowedValues($option = 'foo', $allowedValues = array('bar', 'baz'));
+        $resolver->setAllowedValues($option = 'foo', $allowedValues = ['bar', 'baz']);
 
         $debug = new OptionsResolverIntrospector($resolver);
         $this->assertSame($allowedValues, $debug->getAllowedValues($option));
diff --git a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
index 213c471a74..886a88ebfa 100644
--- a/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
+++ b/src/Symfony/Component/OptionsResolver/Tests/OptionsResolverTest.php
@@ -38,7 +38,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('z', '1');
         $this->resolver->setDefault('a', '2');
 
-        $this->resolver->resolve(array('foo' => 'bar'));
+        $this->resolver->resolve(['foo' => 'bar']);
     }
 
     /**
@@ -50,7 +50,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('z', '1');
         $this->resolver->setDefault('a', '2');
 
-        $this->resolver->resolve(array('ping' => 'pong', 'foo' => 'bar', 'baz' => 'bam'));
+        $this->resolver->resolve(['ping' => 'pong', 'foo' => 'bar', 'baz' => 'bam']);
     }
 
     /**
@@ -59,7 +59,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsFromLazyOption()
     {
         $this->resolver->setDefault('foo', function (Options $options) {
-            $options->resolve(array());
+            $options->resolve([]);
         });
 
         $this->resolver->resolve();
@@ -75,10 +75,10 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('one', '1');
         $this->resolver->setDefault('two', '20');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'one' => '1',
             'two' => '20',
-        ), $this->resolver->resolve());
+        ], $this->resolver->resolve());
     }
 
     /**
@@ -118,7 +118,7 @@ class OptionsResolverTest extends TestCase
             return 'lazy';
         });
 
-        $this->assertEquals(array('foo' => 'lazy'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'lazy'], $this->resolver->resolve());
     }
 
     public function testClosureWithoutTypeHintNotInvoked()
@@ -129,7 +129,7 @@ class OptionsResolverTest extends TestCase
 
         $this->resolver->setDefault('foo', $closure);
 
-        $this->assertSame(array('foo' => $closure), $this->resolver->resolve());
+        $this->assertSame(['foo' => $closure], $this->resolver->resolve());
     }
 
     public function testClosureWithoutParametersNotInvoked()
@@ -140,7 +140,7 @@ class OptionsResolverTest extends TestCase
 
         $this->resolver->setDefault('foo', $closure);
 
-        $this->assertSame(array('foo' => $closure), $this->resolver->resolve());
+        $this->assertSame(['foo' => $closure], $this->resolver->resolve());
     }
 
     public function testAccessPreviousDefaultValue()
@@ -155,7 +155,7 @@ class OptionsResolverTest extends TestCase
             return 'lazy';
         });
 
-        $this->assertEquals(array('foo' => 'lazy'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'lazy'], $this->resolver->resolve());
     }
 
     public function testAccessPreviousLazyDefaultValue()
@@ -172,7 +172,7 @@ class OptionsResolverTest extends TestCase
             return 'lazy';
         });
 
-        $this->assertEquals(array('foo' => 'lazy'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'lazy'], $this->resolver->resolve());
     }
 
     public function testPreviousValueIsNotEvaluatedIfNoSecondArgument()
@@ -187,7 +187,7 @@ class OptionsResolverTest extends TestCase
             return 'lazy';
         });
 
-        $this->assertEquals(array('foo' => 'lazy'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'lazy'], $this->resolver->resolve());
     }
 
     public function testOverwrittenLazyOptionNotEvaluated()
@@ -198,7 +198,7 @@ class OptionsResolverTest extends TestCase
 
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testInvokeEachLazyOptionOnlyOnce()
@@ -259,7 +259,7 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setRequired('foo');
 
-        $this->assertNotEmpty($this->resolver->resolve(array('foo' => 'bar')));
+        $this->assertNotEmpty($this->resolver->resolve(['foo' => 'bar']));
     }
 
     public function testIsRequired()
@@ -307,11 +307,11 @@ class OptionsResolverTest extends TestCase
 
     public function testGetRequiredOptions()
     {
-        $this->resolver->setRequired(array('foo', 'bar'));
+        $this->resolver->setRequired(['foo', 'bar']);
         $this->resolver->setDefault('bam', 'baz');
         $this->resolver->setDefault('foo', 'boo');
 
-        $this->assertSame(array('foo', 'bar'), $this->resolver->getRequiredOptions());
+        $this->assertSame(['foo', 'bar'], $this->resolver->getRequiredOptions());
     }
 
     public function testIsMissingIfNotSet()
@@ -346,11 +346,11 @@ class OptionsResolverTest extends TestCase
 
     public function testGetMissingOptions()
     {
-        $this->resolver->setRequired(array('foo', 'bar'));
+        $this->resolver->setRequired(['foo', 'bar']);
         $this->resolver->setDefault('bam', 'baz');
         $this->resolver->setDefault('foo', 'boo');
 
-        $this->assertSame(array('bar'), $this->resolver->getMissingOptions());
+        $this->assertSame(['bar'], $this->resolver->getMissingOptions());
     }
 
     /**
@@ -369,7 +369,7 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
 
-        $this->assertSame(array(), $this->resolver->resolve());
+        $this->assertSame([], $this->resolver->resolve());
     }
 
     public function testDefinedOptionsIncludedIfDefaultSetBefore()
@@ -377,7 +377,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', 'bar');
         $this->resolver->setDefined('foo');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testDefinedOptionsIncludedIfDefaultSetAfter()
@@ -385,14 +385,14 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testDefinedOptionsIncludedIfPassedToResolve()
     {
         $this->resolver->setDefined('foo');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve(array('foo' => 'bar')));
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve(['foo' => 'bar']));
     }
 
     public function testIsDefined()
@@ -425,11 +425,11 @@ class OptionsResolverTest extends TestCase
 
     public function testGetDefinedOptions()
     {
-        $this->resolver->setDefined(array('foo', 'bar'));
+        $this->resolver->setDefined(['foo', 'bar']);
         $this->resolver->setDefault('baz', 'bam');
         $this->resolver->setRequired('boo');
 
-        $this->assertSame(array('foo', 'bar', 'baz', 'boo'), $this->resolver->getDefinedOptions());
+        $this->assertSame(['foo', 'bar', 'baz', 'boo'], $this->resolver->getDefinedOptions());
     }
 
     public function testRemovedOptionsAreNotDefined()
@@ -496,7 +496,7 @@ class OptionsResolverTest extends TestCase
                 return false;
             })
         ;
-        $this->resolver->resolve(array('foo' => null));
+        $this->resolver->resolve(['foo' => null]);
     }
 
     /**
@@ -506,7 +506,7 @@ class OptionsResolverTest extends TestCase
     public function testFailsIfCyclicDependencyBetweenDeprecation()
     {
         $this->resolver
-            ->setDefined(array('foo', 'bar'))
+            ->setDefined(['foo', 'bar'])
             ->setDeprecated('foo', function (Options $options, $value) {
                 $options['bar'];
             })
@@ -514,7 +514,7 @@ class OptionsResolverTest extends TestCase
                 $options['foo'];
             })
         ;
-        $this->resolver->resolve(array('foo' => null, 'bar' => null));
+        $this->resolver->resolve(['foo' => null, 'bar' => null]);
     }
 
     public function testIsDeprecated()
@@ -564,22 +564,22 @@ class OptionsResolverTest extends TestCase
 
     public function provideDeprecationData()
     {
-        yield 'It deprecates an option with default message' => array(
+        yield 'It deprecates an option with default message' => [
             function (OptionsResolver $resolver) {
                 $resolver
-                    ->setDefined(array('foo', 'bar'))
+                    ->setDefined(['foo', 'bar'])
                     ->setDeprecated('foo')
                 ;
             },
-            array('foo' => 'baz'),
-            array(
+            ['foo' => 'baz'],
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'The option "foo" is deprecated.',
-            ),
+            ],
             1,
-        );
+        ];
 
-        yield 'It deprecates an option with custom message' => array(
+        yield 'It deprecates an option with custom message' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefined('foo')
@@ -589,15 +589,15 @@ class OptionsResolverTest extends TestCase
                     ->setDeprecated('foo', 'The option "foo" is deprecated, use "bar" option instead.')
                 ;
             },
-            array('foo' => 'baz'),
-            array(
+            ['foo' => 'baz'],
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'The option "foo" is deprecated, use "bar" option instead.',
-            ),
+            ],
             2,
-        );
+        ];
 
-        yield 'It deprecates an option evaluated in another definition' => array(
+        yield 'It deprecates an option evaluated in another definition' => [
             function (OptionsResolver $resolver) {
                 // defined by superclass
                 $resolver
@@ -609,19 +609,19 @@ class OptionsResolverTest extends TestCase
                     return $options['foo']; // It triggers a deprecation
                 });
             },
-            array(),
-            array(
+            [],
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'The option "foo" is deprecated.',
-            ),
+            ],
             1,
-        );
+        ];
 
-        yield 'It deprecates allowed type and value' => array(
+        yield 'It deprecates allowed type and value' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefault('foo', null)
-                    ->setAllowedTypes('foo', array('null', 'string', \stdClass::class))
+                    ->setAllowedTypes('foo', ['null', 'string', \stdClass::class])
                     ->setDeprecated('foo', function (Options $options, $value) {
                         if ($value instanceof \stdClass) {
                             return sprintf('Passing an instance of "%s" to option "foo" is deprecated, pass its FQCN instead.', \stdClass::class);
@@ -631,19 +631,19 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array('foo' => new \stdClass()),
-            array(
+            ['foo' => new \stdClass()],
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'Passing an instance of "stdClass" to option "foo" is deprecated, pass its FQCN instead.',
-            ),
+            ],
             1,
-        );
+        ];
 
-        yield 'It triggers a deprecation based on the value only if option is provided by the user' => array(
+        yield 'It triggers a deprecation based on the value only if option is provided by the user' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefined('foo')
-                    ->setAllowedTypes('foo', array('null', 'bool'))
+                    ->setAllowedTypes('foo', ['null', 'bool'])
                     ->setDeprecated('foo', function (Options $options, $value) {
                         if (!\is_bool($value)) {
                             return 'Passing a value different than true or false is deprecated.';
@@ -652,7 +652,7 @@ class OptionsResolverTest extends TestCase
                         return '';
                     })
                     ->setDefault('baz', null)
-                    ->setAllowedTypes('baz', array('null', 'int'))
+                    ->setAllowedTypes('baz', ['null', 'int'])
                     ->setDeprecated('baz', function (Options $options, $value) {
                         if (!\is_int($value)) {
                             return 'Not passing an integer is deprecated.';
@@ -667,15 +667,15 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array('foo' => null), // It triggers a deprecation
-            array(
+            ['foo' => null], // It triggers a deprecation
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'Passing a value different than true or false is deprecated.',
-            ),
+            ],
             1,
-        );
+        ];
 
-        yield 'It ignores a deprecation if closure returns an empty string' => array(
+        yield 'It ignores a deprecation if closure returns an empty string' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefault('foo', null)
@@ -684,12 +684,12 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array('foo' => Bar::class),
+            ['foo' => Bar::class],
             null,
             0,
-        );
+        ];
 
-        yield 'It deprecates value depending on other option value' => array(
+        yield 'It deprecates value depending on other option value' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefault('widget', null)
@@ -703,15 +703,15 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array('widget' => 'single_text', 'date_format' => 2),
-            array(
+            ['widget' => 'single_text', 'date_format' => 2],
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'Using the "date_format" option when the "widget" option is set to "single_text" is deprecated.',
-            ),
+            ],
             1,
-        );
+        ];
 
-        yield 'It triggers a deprecation for each evaluation' => array(
+        yield 'It triggers a deprecation for each evaluation' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     // defined by superclass
@@ -729,15 +729,15 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array('foo' => 'baz'), // It triggers a deprecation
-            array(
+            ['foo' => 'baz'], // It triggers a deprecation
+            [
                 'type' => E_USER_DEPRECATED,
                 'message' => 'The option "foo" is deprecated.',
-            ),
+            ],
             4,
-        );
+        ];
 
-        yield 'It ignores a deprecation if no option is provided by the user' => array(
+        yield 'It ignores a deprecation if no option is provided by the user' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefined('foo')
@@ -746,12 +746,12 @@ class OptionsResolverTest extends TestCase
                     ->setDeprecated('bar')
                 ;
             },
-            array(),
+            [],
             null,
             0,
-        );
+        ];
 
-        yield 'It explicitly ignores a depreciation' => array(
+        yield 'It explicitly ignores a depreciation' => [
             function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefault('baz', function (Options $options) {
@@ -764,10 +764,10 @@ class OptionsResolverTest extends TestCase
                     })
                 ;
             },
-            array(),
+            [],
             null,
             0,
-        );
+        ];
     }
 
     /**
@@ -782,9 +782,9 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'string[]');
-        $options = $this->resolver->resolve(array('foo' => array('bar', 'baz')));
+        $options = $this->resolver->resolve(['foo' => ['bar', 'baz']]);
 
-        $this->assertSame(array('foo' => array('bar', 'baz')), $options);
+        $this->assertSame(['foo' => ['bar', 'baz']], $options);
     }
 
     /**
@@ -810,7 +810,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[]');
 
-        $this->resolver->resolve(array('foo' => array(new \DateTime())));
+        $this->resolver->resolve(['foo' => [new \DateTime()]]);
     }
 
     /**
@@ -822,7 +822,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[]');
 
-        $this->resolver->resolve(array('foo' => 'bar'));
+        $this->resolver->resolve(['foo' => 'bar']);
     }
 
     /**
@@ -835,11 +835,11 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedTypes('foo', 'int[]');
         $values = range(1, 5);
         $values[] = new \stdClass();
-        $values[] = array();
+        $values[] = [];
         $values[] = new \DateTime();
         $values[] = 123;
 
-        $this->resolver->resolve(array('foo' => $values));
+        $this->resolver->resolve(['foo' => $values]);
     }
 
     /**
@@ -852,11 +852,11 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedTypes('foo', 'int[][]');
 
         $this->resolver->resolve(
-            array(
-                'foo' => array(
-                    array(1.2),
-                ),
-            )
+            [
+                'foo' => [
+                    [1.2],
+                ],
+            ]
         );
     }
 
@@ -875,21 +875,21 @@ class OptionsResolverTest extends TestCase
             $this->setExpectedException('Symfony\Component\OptionsResolver\Exception\InvalidOptionsException', $exceptionMessage);
         }
 
-        $this->resolver->resolve(array('option' => $actualType));
+        $this->resolver->resolve(['option' => $actualType]);
     }
 
     public function provideInvalidTypes()
     {
-        return array(
-            array(true, 'string', 'The option "option" with value true is expected to be of type "string", but is of type "boolean".'),
-            array(false, 'string', 'The option "option" with value false is expected to be of type "string", but is of type "boolean".'),
-            array(fopen(__FILE__, 'r'), 'string', 'The option "option" with value resource is expected to be of type "string", but is of type "resource".'),
-            array(array(), 'string', 'The option "option" with value array is expected to be of type "string", but is of type "array".'),
-            array(new OptionsResolver(), 'string', 'The option "option" with value Symfony\Component\OptionsResolver\OptionsResolver is expected to be of type "string", but is of type "Symfony\Component\OptionsResolver\OptionsResolver".'),
-            array(42, 'string', 'The option "option" with value 42 is expected to be of type "string", but is of type "integer".'),
-            array(null, 'string', 'The option "option" with value null is expected to be of type "string", but is of type "NULL".'),
-            array('bar', '\stdClass', 'The option "option" with value "bar" is expected to be of type "\stdClass", but is of type "string".'),
-        );
+        return [
+            [true, 'string', 'The option "option" with value true is expected to be of type "string", but is of type "boolean".'],
+            [false, 'string', 'The option "option" with value false is expected to be of type "string", but is of type "boolean".'],
+            [fopen(__FILE__, 'r'), 'string', 'The option "option" with value resource is expected to be of type "string", but is of type "resource".'],
+            [[], 'string', 'The option "option" with value array is expected to be of type "string", but is of type "array".'],
+            [new OptionsResolver(), 'string', 'The option "option" with value Symfony\Component\OptionsResolver\OptionsResolver is expected to be of type "string", but is of type "Symfony\Component\OptionsResolver\OptionsResolver".'],
+            [42, 'string', 'The option "option" with value 42 is expected to be of type "string", but is of type "integer".'],
+            [null, 'string', 'The option "option" with value null is expected to be of type "string", but is of type "NULL".'],
+            ['bar', '\stdClass', 'The option "option" with value "bar" is expected to be of type "\stdClass", but is of type "string".'],
+        ];
     }
 
     public function testResolveSucceedsIfValidType()
@@ -907,7 +907,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsIfInvalidTypeMultiple()
     {
         $this->resolver->setDefault('foo', 42);
-        $this->resolver->setAllowedTypes('foo', array('string', 'bool'));
+        $this->resolver->setAllowedTypes('foo', ['string', 'bool']);
 
         $this->resolver->resolve();
     }
@@ -915,7 +915,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfValidTypeMultiple()
     {
         $this->resolver->setDefault('foo', true);
-        $this->resolver->setAllowedTypes('foo', array('string', 'bool'));
+        $this->resolver->setAllowedTypes('foo', ['string', 'bool']);
 
         $this->assertNotEmpty($this->resolver->resolve());
     }
@@ -931,14 +931,14 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfTypedArray()
     {
         $this->resolver->setDefault('foo', null);
-        $this->resolver->setAllowedTypes('foo', array('null', 'DateTime[]'));
+        $this->resolver->setAllowedTypes('foo', ['null', 'DateTime[]']);
 
-        $data = array(
-            'foo' => array(
+        $data = [
+            'foo' => [
                 new \DateTime(),
                 new \DateTime(),
-            ),
-        );
+            ],
+        ];
         $result = $this->resolver->resolve($data);
         $this->assertEquals($data, $result);
     }
@@ -1001,7 +1001,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsIfInvalidAddedTypeMultiple()
     {
         $this->resolver->setDefault('foo', 42);
-        $this->resolver->addAllowedTypes('foo', array('string', 'bool'));
+        $this->resolver->addAllowedTypes('foo', ['string', 'bool']);
 
         $this->resolver->resolve();
     }
@@ -1009,7 +1009,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfValidAddedTypeMultiple()
     {
         $this->resolver->setDefault('foo', 'bar');
-        $this->resolver->addAllowedTypes('foo', array('string', 'bool'));
+        $this->resolver->addAllowedTypes('foo', ['string', 'bool']);
 
         $this->assertNotEmpty($this->resolver->resolve());
     }
@@ -1067,7 +1067,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedValues('foo', 'bar');
 
-        $this->resolver->resolve(array('foo' => 42));
+        $this->resolver->resolve(['foo' => 42]);
     }
 
     /**
@@ -1098,7 +1098,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', 'bar');
         $this->resolver->setAllowedValues('foo', 'bar');
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testResolveSucceedsIfValidValueIsNull()
@@ -1106,7 +1106,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', null);
         $this->resolver->setAllowedValues('foo', null);
 
-        $this->assertEquals(array('foo' => null), $this->resolver->resolve());
+        $this->assertEquals(['foo' => null], $this->resolver->resolve());
     }
 
     /**
@@ -1116,7 +1116,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsIfInvalidValueMultiple()
     {
         $this->resolver->setDefault('foo', 42);
-        $this->resolver->setAllowedValues('foo', array('bar', false, null));
+        $this->resolver->setAllowedValues('foo', ['bar', false, null]);
 
         $this->resolver->resolve();
     }
@@ -1124,9 +1124,9 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfValidValueMultiple()
     {
         $this->resolver->setDefault('foo', 'baz');
-        $this->resolver->setAllowedValues('foo', array('bar', 'baz'));
+        $this->resolver->setAllowedValues('foo', ['bar', 'baz']);
 
-        $this->assertEquals(array('foo' => 'baz'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'baz'], $this->resolver->resolve());
     }
 
     public function testResolveFailsIfClosureReturnsFalse()
@@ -1156,7 +1156,7 @@ class OptionsResolverTest extends TestCase
             return true;
         });
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
         $this->assertSame('bar', $passedValue);
     }
 
@@ -1166,11 +1166,11 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsIfAllClosuresReturnFalse()
     {
         $this->resolver->setDefault('foo', 42);
-        $this->resolver->setAllowedValues('foo', array(
+        $this->resolver->setAllowedValues('foo', [
             function () { return false; },
             function () { return false; },
             function () { return false; },
-        ));
+        ]);
 
         $this->resolver->resolve();
     }
@@ -1178,13 +1178,13 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfAnyClosureReturnsTrue()
     {
         $this->resolver->setDefault('foo', 'bar');
-        $this->resolver->setAllowedValues('foo', array(
+        $this->resolver->setAllowedValues('foo', [
             function () { return false; },
             function () { return true; },
             function () { return false; },
-        ));
+        ]);
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     /**
@@ -1225,7 +1225,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', 'bar');
         $this->resolver->addAllowedValues('foo', 'bar');
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testResolveSucceedsIfValidAddedValueIsNull()
@@ -1233,7 +1233,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', null);
         $this->resolver->addAllowedValues('foo', null);
 
-        $this->assertEquals(array('foo' => null), $this->resolver->resolve());
+        $this->assertEquals(['foo' => null], $this->resolver->resolve());
     }
 
     /**
@@ -1242,7 +1242,7 @@ class OptionsResolverTest extends TestCase
     public function testResolveFailsIfInvalidAddedValueMultiple()
     {
         $this->resolver->setDefault('foo', 42);
-        $this->resolver->addAllowedValues('foo', array('bar', 'baz'));
+        $this->resolver->addAllowedValues('foo', ['bar', 'baz']);
 
         $this->resolver->resolve();
     }
@@ -1250,9 +1250,9 @@ class OptionsResolverTest extends TestCase
     public function testResolveSucceedsIfValidAddedValueMultiple()
     {
         $this->resolver->setDefault('foo', 'bar');
-        $this->resolver->addAllowedValues('foo', array('bar', 'baz'));
+        $this->resolver->addAllowedValues('foo', ['bar', 'baz']);
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testAddAllowedValuesDoesNotOverwrite()
@@ -1261,7 +1261,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedValues('foo', 'bar');
         $this->resolver->addAllowedValues('foo', 'baz');
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testAddAllowedValuesDoesNotOverwrite2()
@@ -1270,7 +1270,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedValues('foo', 'bar');
         $this->resolver->addAllowedValues('foo', 'baz');
 
-        $this->assertEquals(array('foo' => 'baz'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'baz'], $this->resolver->resolve());
     }
 
     /**
@@ -1291,7 +1291,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedValues('foo', function () { return false; });
         $this->resolver->addAllowedValues('foo', function () { return true; });
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testResolveSucceedsIfAnyAddedClosureReturnsTrue2()
@@ -1300,7 +1300,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedValues('foo', function () { return true; });
         $this->resolver->addAllowedValues('foo', function () { return false; });
 
-        $this->assertEquals(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testSetNormalizerReturnsThis()
@@ -1316,7 +1316,7 @@ class OptionsResolverTest extends TestCase
             return 'normalized';
         });
 
-        $this->assertEquals(array('foo' => 'normalized'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'normalized'], $this->resolver->resolve());
     }
 
     /**
@@ -1349,7 +1349,7 @@ class OptionsResolverTest extends TestCase
             return 'normalized['.$value.']';
         });
 
-        $this->assertEquals(array('foo' => 'normalized[bar]'), $this->resolver->resolve());
+        $this->assertEquals(['foo' => 'normalized[bar]'], $this->resolver->resolve());
     }
 
     public function testNormalizerReceivesPassedOption()
@@ -1360,9 +1360,9 @@ class OptionsResolverTest extends TestCase
             return 'normalized['.$value.']';
         });
 
-        $resolved = $this->resolver->resolve(array('foo' => 'baz'));
+        $resolved = $this->resolver->resolve(['foo' => 'baz']);
 
-        $this->assertEquals(array('foo' => 'normalized[baz]'), $resolved);
+        $this->assertEquals(['foo' => 'normalized[baz]'], $resolved);
     }
 
     /**
@@ -1409,10 +1409,10 @@ class OptionsResolverTest extends TestCase
             return 'normalized';
         });
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'default' => 'bar',
             'norm' => 'normalized',
-        ), $this->resolver->resolve());
+        ], $this->resolver->resolve());
     }
 
     public function testNormalizerCanAccessLazyOptions()
@@ -1429,10 +1429,10 @@ class OptionsResolverTest extends TestCase
             return 'normalized';
         });
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'lazy' => 'bar',
             'norm' => 'normalized',
-        ), $this->resolver->resolve());
+        ], $this->resolver->resolve());
     }
 
     /**
@@ -1476,7 +1476,7 @@ class OptionsResolverTest extends TestCase
     {
         $throw = true;
 
-        $this->resolver->setDefaults(array('catcher' => null, 'thrower' => null));
+        $this->resolver->setDefaults(['catcher' => null, 'thrower' => null]);
 
         $this->resolver->setNormalizer('catcher', function (Options $options) {
             try {
@@ -1495,7 +1495,7 @@ class OptionsResolverTest extends TestCase
             return true;
         });
 
-        $this->assertSame(array('catcher' => false, 'thrower' => true), $this->resolver->resolve());
+        $this->assertSame(['catcher' => false, 'thrower' => true], $this->resolver->resolve());
     }
 
     public function testCaughtExceptionFromLazyDoesNotCrashOptionResolver()
@@ -1519,7 +1519,7 @@ class OptionsResolverTest extends TestCase
             return true;
         });
 
-        $this->assertSame(array('catcher' => false, 'thrower' => true), $this->resolver->resolve());
+        $this->assertSame(['catcher' => false, 'thrower' => true], $this->resolver->resolve());
     }
 
     public function testInvokeEachNormalizerOnlyOnce()
@@ -1556,7 +1556,7 @@ class OptionsResolverTest extends TestCase
 
     public function testSetDefaultsReturnsThis()
     {
-        $this->assertSame($this->resolver, $this->resolver->setDefaults(array('foo', 'bar')));
+        $this->assertSame($this->resolver, $this->resolver->setDefaults(['foo', 'bar']));
     }
 
     public function testSetDefaults()
@@ -1564,16 +1564,16 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('one', '1');
         $this->resolver->setDefault('two', 'bar');
 
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'two' => '2',
             'three' => '3',
-        ));
+        ]);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'one' => '1',
             'two' => '2',
             'three' => '3',
-        ), $this->resolver->resolve());
+        ], $this->resolver->resolve());
     }
 
     /**
@@ -1582,7 +1582,7 @@ class OptionsResolverTest extends TestCase
     public function testFailIfSetDefaultsFromLazyOption()
     {
         $this->resolver->setDefault('foo', function (Options $options) {
-            $options->setDefaults(array('two' => '2'));
+            $options->setDefaults(['two' => '2']);
         });
 
         $this->resolver->resolve();
@@ -1601,7 +1601,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('baz', 'boo');
         $this->resolver->remove('foo');
 
-        $this->assertSame(array('baz' => 'boo'), $this->resolver->resolve());
+        $this->assertSame(['baz' => 'boo'], $this->resolver->resolve());
     }
 
     public function testRemoveMultipleOptions()
@@ -1610,9 +1610,9 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('baz', 'boo');
         $this->resolver->setDefault('doo', 'dam');
 
-        $this->resolver->remove(array('foo', 'doo'));
+        $this->resolver->remove(['foo', 'doo']);
 
-        $this->assertSame(array('baz' => 'boo'), $this->resolver->resolve());
+        $this->assertSame(['baz' => 'boo'], $this->resolver->resolve());
     }
 
     public function testRemoveLazyOption()
@@ -1622,7 +1622,7 @@ class OptionsResolverTest extends TestCase
         });
         $this->resolver->remove('foo');
 
-        $this->assertSame(array(), $this->resolver->resolve());
+        $this->assertSame([], $this->resolver->resolve());
     }
 
     public function testRemoveNormalizer()
@@ -1634,7 +1634,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->remove('foo');
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testRemoveAllowedTypes()
@@ -1644,17 +1644,17 @@ class OptionsResolverTest extends TestCase
         $this->resolver->remove('foo');
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testRemoveAllowedValues()
     {
         $this->resolver->setDefault('foo', 'bar');
-        $this->resolver->setAllowedValues('foo', array('baz', 'boo'));
+        $this->resolver->setAllowedValues('foo', ['baz', 'boo']);
         $this->resolver->remove('foo');
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     /**
@@ -1698,7 +1698,7 @@ class OptionsResolverTest extends TestCase
         });
         $this->resolver->clear();
 
-        $this->assertSame(array(), $this->resolver->resolve());
+        $this->assertSame([], $this->resolver->resolve());
     }
 
     public function testClearNormalizer()
@@ -1710,7 +1710,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->clear();
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testClearAllowedTypes()
@@ -1720,7 +1720,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->clear();
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testClearAllowedValues()
@@ -1730,7 +1730,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->clear();
         $this->resolver->setDefault('foo', 'bar');
 
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     /**
@@ -1789,7 +1789,7 @@ class OptionsResolverTest extends TestCase
             // accessed
         });
 
-        $this->resolver->resolve(array('default2' => 42, 'required' => 'value'));
+        $this->resolver->resolve(['default2' => 42, 'required' => 'value']);
     }
 
     /**
@@ -1887,7 +1887,7 @@ class OptionsResolverTest extends TestCase
             Assert::assertCount(4, $options);
         });
 
-        $this->assertCount(4, $this->resolver->resolve(array('required' => 'value')));
+        $this->assertCount(4, $this->resolver->resolve(['required' => 'value']));
     }
 
     /**
@@ -1912,18 +1912,18 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[][]');
 
-        $this->assertEquals(array(
-            'foo' => array(
-                array(
+        $this->assertEquals([
+            'foo' => [
+                [
                     1, 2,
-                ),
-            ),
-        ), $this->resolver->resolve(
-            array(
-                'foo' => array(
-                    array(1, 2),
-                ),
-            )
+                ],
+            ],
+        ], $this->resolver->resolve(
+            [
+                'foo' => [
+                    [1, 2],
+                ],
+            ]
         ));
     }
 
@@ -1932,26 +1932,26 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[][][][]');
 
-        $this->assertEquals(array(
-            'foo' => array(
-                array(
-                    array(
-                        array(
+        $this->assertEquals([
+            'foo' => [
+                [
+                    [
+                        [
                             1, 2,
-                        ),
-                    ),
-                ),
-            ),
-        ), $this->resolver->resolve(
-            array(
-                'foo' => array(
-                    array(
-                        array(
-                            array(1, 2),
-                        ),
-                    ),
-                ),
-            )
+                        ],
+                    ],
+                ],
+            ],
+        ], $this->resolver->resolve(
+            [
+                'foo' => [
+                    [
+                        [
+                            [1, 2],
+                        ],
+                    ],
+                ],
+            ]
         ));
     }
 
@@ -1965,15 +1965,15 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setAllowedTypes('foo', 'float[][][][]');
 
         $this->resolver->resolve(
-            array(
-                'foo' => array(
-                    array(
-                        array(
-                            array(1, 2),
-                        ),
-                    ),
-                ),
-            )
+            [
+                'foo' => [
+                    [
+                        [
+                            [1, 2],
+                        ],
+                    ],
+                ],
+            ]
         );
     }
 
@@ -1985,11 +1985,11 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[][]');
-        $this->resolver->resolve(array(
-            'foo' => array(
-                array(1, true, 'str', array(2, 3)),
-            ),
-        ));
+        $this->resolver->resolve([
+            'foo' => [
+                [1, true, 'str', [2, 3]],
+            ],
+        ]);
     }
 
     /**
@@ -2000,11 +2000,11 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'int[][]');
-        $this->resolver->resolve(array(
-            'foo' => array(
-                array(true, 'str', array(2, 3)),
-            ),
-        ));
+        $this->resolver->resolve([
+            'foo' => [
+                [true, 'str', [2, 3]],
+            ],
+        ]);
     }
 
     /**
@@ -2015,11 +2015,11 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'string[][][]');
-        $this->resolver->resolve(array(
-            'foo' => array(
-                array('str', array(1, 2)),
-            ),
-        ));
+        $this->resolver->resolve([
+            'foo' => [
+                ['str', [1, 2]],
+            ],
+        ]);
     }
 
     /**
@@ -2030,12 +2030,12 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'string[][][]');
-        $this->resolver->resolve(array(
-            'foo' => array(
-                array(
-                    array('str'), array(1, 2), ),
-            ),
-        ));
+        $this->resolver->resolve([
+            'foo' => [
+                [
+                    ['str'], [1, 2], ],
+            ],
+        ]);
     }
 
     /**
@@ -2046,21 +2046,21 @@ class OptionsResolverTest extends TestCase
     {
         $this->resolver->setDefined('foo');
         $this->resolver->setAllowedTypes('foo', 'string[]');
-        $this->resolver->resolve(array(
-            'foo' => array(
-                array(
-                    array('str'), array(1, 2), ),
-            ),
-        ));
+        $this->resolver->resolve([
+            'foo' => [
+                [
+                    ['str'], [1, 2], ],
+            ],
+        ]);
     }
 
     public function testIsNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'database' => function (OptionsResolver $resolver) {
-                $resolver->setDefined(array('host', 'port'));
+                $resolver->setDefined(['host', 'port']);
             },
-        ));
+        ]);
         $this->assertTrue($this->resolver->isNested('database'));
     }
 
@@ -2070,15 +2070,15 @@ class OptionsResolverTest extends TestCase
      */
     public function testFailsIfUndefinedNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
-                $resolver->setDefined(array('host', 'port'));
+                $resolver->setDefined(['host', 'port']);
             },
-        ));
-        $this->resolver->resolve(array(
-            'database' => array('foo' => 'bar'),
-        ));
+        ]);
+        $this->resolver->resolve([
+            'database' => ['foo' => 'bar'],
+        ]);
     }
 
     /**
@@ -2087,15 +2087,15 @@ class OptionsResolverTest extends TestCase
      */
     public function testFailsIfMissingRequiredNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
                 $resolver->setRequired('host');
             },
-        ));
-        $this->resolver->resolve(array(
-            'database' => array(),
-        ));
+        ]);
+        $this->resolver->resolve([
+            'database' => [],
+        ]);
     }
 
     /**
@@ -2104,17 +2104,17 @@ class OptionsResolverTest extends TestCase
      */
     public function testFailsIfInvalidTypeNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
                 $resolver
                     ->setDefined('logging')
                     ->setAllowedTypes('logging', 'bool');
             },
-        ));
-        $this->resolver->resolve(array(
-            'database' => array('logging' => null),
-        ));
+        ]);
+        $this->resolver->resolve([
+            'database' => ['logging' => null],
+        ]);
     }
 
     /**
@@ -2123,135 +2123,135 @@ class OptionsResolverTest extends TestCase
      */
     public function testFailsIfNotArrayIsGivenForNestedOptions()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
                 $resolver->setDefined('host');
             },
-        ));
-        $this->resolver->resolve(array(
+        ]);
+        $this->resolver->resolve([
             'database' => null,
-        ));
+        ]);
     }
 
     public function testResolveNestedOptionsWithoutDefault()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
-                $resolver->setDefined(array('host', 'port'));
+                $resolver->setDefined(['host', 'port']);
             },
-        ));
+        ]);
         $actualOptions = $this->resolver->resolve();
-        $expectedOptions = array(
+        $expectedOptions = [
             'name' => 'default',
-            'database' => array(),
-        );
+            'database' => [],
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
     public function testResolveNestedOptionsWithDefault()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
-                $resolver->setDefaults(array(
+                $resolver->setDefaults([
                     'host' => 'localhost',
                     'port' => 3306,
-                ));
+                ]);
             },
-        ));
+        ]);
         $actualOptions = $this->resolver->resolve();
-        $expectedOptions = array(
+        $expectedOptions = [
             'name' => 'default',
-            'database' => array(
+            'database' => [
                 'host' => 'localhost',
                 'port' => 3306,
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
     public function testResolveMultipleNestedOptions()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'name' => 'default',
             'database' => function (OptionsResolver $resolver) {
                 $resolver
-                    ->setRequired(array('dbname', 'host'))
-                    ->setDefaults(array(
+                    ->setRequired(['dbname', 'host'])
+                    ->setDefaults([
                         'port' => 3306,
                         'replicas' => function (OptionsResolver $resolver) {
-                            $resolver->setDefaults(array(
+                            $resolver->setDefaults([
                                 'host' => 'replica1',
                                 'port' => 3306,
-                            ));
+                            ]);
                         },
-                    ));
+                    ]);
             },
-        ));
-        $actualOptions = $this->resolver->resolve(array(
+        ]);
+        $actualOptions = $this->resolver->resolve([
             'name' => 'custom',
-            'database' => array(
+            'database' => [
                 'dbname' => 'test',
                 'host' => 'localhost',
                 'port' => null,
-                'replicas' => array('host' => 'replica2'),
-            ),
-        ));
-        $expectedOptions = array(
+                'replicas' => ['host' => 'replica2'],
+            ],
+        ]);
+        $expectedOptions = [
             'name' => 'custom',
-            'database' => array(
+            'database' => [
                 'port' => null,
-                'replicas' => array('port' => 3306, 'host' => 'replica2'),
+                'replicas' => ['port' => 3306, 'host' => 'replica2'],
                 'dbname' => 'test',
                 'host' => 'localhost',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
     public function testResolveLazyOptionUsingNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'version' => function (Options $options) {
                 return $options['database']['server_version'];
             },
             'database' => function (OptionsResolver $resolver) {
                 $resolver->setDefault('server_version', '3.15');
             },
-        ));
+        ]);
         $actualOptions = $this->resolver->resolve();
-        $expectedOptions = array(
-            'database' => array('server_version' => '3.15'),
+        $expectedOptions = [
+            'database' => ['server_version' => '3.15'],
             'version' => '3.15',
-        );
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
     public function testNormalizeNestedOptionValue()
     {
         $this->resolver
-            ->setDefaults(array(
+            ->setDefaults([
                 'database' => function (OptionsResolver $resolver) {
-                    $resolver->setDefaults(array(
+                    $resolver->setDefaults([
                         'port' => 3306,
                         'host' => 'localhost',
                         'dbname' => 'demo',
-                    ));
+                    ]);
                 },
-            ))
+            ])
             ->setNormalizer('database', function (Options $options, $value) {
                 ksort($value);
 
                 return $value;
             });
-        $actualOptions = $this->resolver->resolve(array(
-            'database' => array('dbname' => 'test'),
-        ));
-        $expectedOptions = array(
-            'database' => array('dbname' => 'test', 'host' => 'localhost', 'port' => 3306),
-        );
+        $actualOptions = $this->resolver->resolve([
+            'database' => ['dbname' => 'test'],
+        ]);
+        $expectedOptions = [
+            'database' => ['dbname' => 'test', 'host' => 'localhost', 'port' => 3306],
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
@@ -2265,7 +2265,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', function (Options $options) {
             return 'lazy';
         });
-        $this->assertSame(array('foo' => 'lazy'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'lazy'], $this->resolver->resolve());
     }
 
     public function testOverwrittenNestedOptionNotEvaluatedIfScalarDefault()
@@ -2276,7 +2276,7 @@ class OptionsResolverTest extends TestCase
         });
         // defined by subclass
         $this->resolver->setDefault('foo', 'bar');
-        $this->assertSame(array('foo' => 'bar'), $this->resolver->resolve());
+        $this->assertSame(['foo' => 'bar'], $this->resolver->resolve());
     }
 
     public function testOverwrittenLazyOptionNotEvaluatedIfNestedOption()
@@ -2289,7 +2289,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', function (OptionsResolver $resolver) {
             $resolver->setDefault('bar', 'baz');
         });
-        $this->assertSame(array('foo' => array('bar' => 'baz')), $this->resolver->resolve());
+        $this->assertSame(['foo' => ['bar' => 'baz']], $this->resolver->resolve());
     }
 
     public function testResolveAllNestedOptionDefinitions()
@@ -2306,7 +2306,7 @@ class OptionsResolverTest extends TestCase
         $this->resolver->setDefault('foo', function (OptionsResolver $resolver) {
             $resolver->setDefault('ping', 'pong');
         });
-        $this->assertSame(array('foo' => array('ping' => 'pong', 'bar' => 'baz')), $this->resolver->resolve());
+        $this->assertSame(['foo' => ['ping' => 'pong', 'bar' => 'baz']], $this->resolver->resolve());
     }
 
     public function testNormalizeNestedValue()
@@ -2323,7 +2323,7 @@ class OptionsResolverTest extends TestCase
 
             return $resolvedValue;
         });
-        $this->assertSame(array('foo' => array('bar' => 'baz')), $this->resolver->resolve());
+        $this->assertSame(['foo' => ['bar' => 'baz']], $this->resolver->resolve());
     }
 
     /**
@@ -2342,14 +2342,14 @@ class OptionsResolverTest extends TestCase
      */
     public function testFailsIfCyclicDependencyBetweenNestedOptionAndParentLazyOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'version' => function (Options $options) {
                 return $options['database']['server_version'];
             },
             'database' => function (OptionsResolver $resolver, Options $parent) {
                 $resolver->setDefault('server_version', $parent['version']);
             },
-        ));
+        ]);
         $this->resolver->resolve();
     }
 
@@ -2385,13 +2385,13 @@ class OptionsResolverTest extends TestCase
 
     public function testGetAccessToParentOptionFromNestedOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'version' => 3.15,
             'database' => function (OptionsResolver $resolver, Options $parent) {
                 $resolver->setDefault('server_version', $parent['version']);
             },
-        ));
-        $this->assertSame(array('version' => 3.15, 'database' => array('server_version' => 3.15)), $this->resolver->resolve());
+        ]);
+        $this->assertSame(['version' => 3.15, 'database' => ['server_version' => 3.15]], $this->resolver->resolve());
     }
 
     public function testNestedClosureWithoutTypeHintNotInvoked()
@@ -2400,7 +2400,7 @@ class OptionsResolverTest extends TestCase
             Assert::fail('Should not be called');
         };
         $this->resolver->setDefault('foo', $closure);
-        $this->assertSame(array('foo' => $closure), $this->resolver->resolve());
+        $this->assertSame(['foo' => $closure], $this->resolver->resolve());
     }
 
     public function testNestedClosureWithoutTypeHint2ndArgumentNotInvoked()
@@ -2409,12 +2409,12 @@ class OptionsResolverTest extends TestCase
             Assert::fail('Should not be called');
         };
         $this->resolver->setDefault('foo', $closure);
-        $this->assertSame(array('foo' => $closure), $this->resolver->resolve());
+        $this->assertSame(['foo' => $closure], $this->resolver->resolve());
     }
 
     public function testResolveLazyOptionWithTransitiveDefaultDependency()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'ip' => null,
             'database' => function (OptionsResolver $resolver, Options $parent) {
                 $resolver->setDefault('host', $parent['ip']);
@@ -2425,22 +2425,22 @@ class OptionsResolverTest extends TestCase
             'secondary_replica' => function (Options $options) {
                 return $options['database']['primary_replica']['host'];
             },
-        ));
-        $actualOptions = $this->resolver->resolve(array('ip' => '127.0.0.1'));
-        $expectedOptions = array(
+        ]);
+        $actualOptions = $this->resolver->resolve(['ip' => '127.0.0.1']);
+        $expectedOptions = [
             'ip' => '127.0.0.1',
-            'database' => array(
+            'database' => [
                 'host' => '127.0.0.1',
-                'primary_replica' => array('host' => '127.0.0.1'),
-            ),
+                'primary_replica' => ['host' => '127.0.0.1'],
+            ],
             'secondary_replica' => '127.0.0.1',
-        );
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 
     public function testAccessToParentOptionFromNestedNormalizerAndLazyOption()
     {
-        $this->resolver->setDefaults(array(
+        $this->resolver->setDefaults([
             'debug' => true,
             'database' => function (OptionsResolver $resolver, Options $parent) {
                 $resolver
@@ -2452,15 +2452,15 @@ class OptionsResolverTest extends TestCase
                         return false === $parent['debug'] ? true : $value;
                     });
             },
-        ));
-        $actualOptions = $this->resolver->resolve(array(
+        ]);
+        $actualOptions = $this->resolver->resolve([
             'debug' => false,
-            'database' => array('logging' => false),
-        ));
-        $expectedOptions = array(
+            'database' => ['logging' => false],
+        ]);
+        $expectedOptions = [
             'debug' => false,
-            'database' => array('profiling' => false, 'logging' => true),
-        );
+            'database' => ['profiling' => false, 'logging' => true],
+        ];
         $this->assertSame($expectedOptions, $actualOptions);
     }
 }
diff --git a/src/Symfony/Component/Process/CHANGELOG.md b/src/Symfony/Component/Process/CHANGELOG.md
index 13fe89eafe..31d063852e 100644
--- a/src/Symfony/Component/Process/CHANGELOG.md
+++ b/src/Symfony/Component/Process/CHANGELOG.md
@@ -21,9 +21,9 @@ CHANGELOG
 -----
 
  * environment variables will always be inherited
- * added a second `array $env = array()` argument to the `start()`, `run()`,
+ * added a second `array $env = []` argument to the `start()`, `run()`,
    `mustRun()`, and `restart()` methods of the `Process` class
- * added a second `array $env = array()` argument to the `start()` method of the
+ * added a second `array $env = []` argument to the `start()` method of the
    `PhpProcess` class
  * the `ProcessUtils::escapeArgument()` method has been removed
  * the `areEnvironmentVariablesInherited()`, `getOptions()`, and `setOptions()`
diff --git a/src/Symfony/Component/Process/ExecutableFinder.php b/src/Symfony/Component/Process/ExecutableFinder.php
index 90cafa34e3..a621fc6918 100644
--- a/src/Symfony/Component/Process/ExecutableFinder.php
+++ b/src/Symfony/Component/Process/ExecutableFinder.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\Process;
  */
 class ExecutableFinder
 {
-    private $suffixes = array('.exe', '.bat', '.cmd', '.com');
+    private $suffixes = ['.exe', '.bat', '.cmd', '.com'];
 
     /**
      * Replaces default suffixes of executable.
@@ -48,11 +48,11 @@ class ExecutableFinder
      *
      * @return string|null The executable path or default value
      */
-    public function find($name, $default = null, array $extraDirs = array())
+    public function find($name, $default = null, array $extraDirs = [])
     {
         if (ini_get('open_basedir')) {
             $searchPath = explode(PATH_SEPARATOR, ini_get('open_basedir'));
-            $dirs = array();
+            $dirs = [];
             foreach ($searchPath as $path) {
                 // Silencing against https://bugs.php.net/69240
                 if (@is_dir($path)) {
@@ -70,7 +70,7 @@ class ExecutableFinder
             );
         }
 
-        $suffixes = array('');
+        $suffixes = [''];
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $pathExt = getenv('PATHEXT');
             $suffixes = array_merge($pathExt ? explode(PATH_SEPARATOR, $pathExt) : $this->suffixes, $suffixes);
diff --git a/src/Symfony/Component/Process/InputStream.php b/src/Symfony/Component/Process/InputStream.php
index c8e4f00ef9..426ffa33a3 100644
--- a/src/Symfony/Component/Process/InputStream.php
+++ b/src/Symfony/Component/Process/InputStream.php
@@ -22,7 +22,7 @@ class InputStream implements \IteratorAggregate
 {
     /** @var callable|null */
     private $onEmpty = null;
-    private $input = array();
+    private $input = [];
     private $open = true;
 
     /**
diff --git a/src/Symfony/Component/Process/PhpExecutableFinder.php b/src/Symfony/Component/Process/PhpExecutableFinder.php
index ae8b4da879..461ea13117 100644
--- a/src/Symfony/Component/Process/PhpExecutableFinder.php
+++ b/src/Symfony/Component/Process/PhpExecutableFinder.php
@@ -54,7 +54,7 @@ class PhpExecutableFinder
         $args = $includeArgs && $args ? ' '.implode(' ', $args) : '';
 
         // PHP_BINARY return the current sapi executable
-        if (PHP_BINARY && \in_array(\PHP_SAPI, array('cli', 'cli-server', 'phpdbg'), true)) {
+        if (PHP_BINARY && \in_array(\PHP_SAPI, ['cli', 'cli-server', 'phpdbg'], true)) {
             return PHP_BINARY.$args;
         }
 
@@ -76,7 +76,7 @@ class PhpExecutableFinder
             return $php;
         }
 
-        $dirs = array(PHP_BINDIR);
+        $dirs = [PHP_BINDIR];
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $dirs[] = 'C:\xampp\php\\';
         }
@@ -91,7 +91,7 @@ class PhpExecutableFinder
      */
     public function findArguments()
     {
-        $arguments = array();
+        $arguments = [];
         if ('phpdbg' === \PHP_SAPI) {
             $arguments[] = '-qrr';
         }
diff --git a/src/Symfony/Component/Process/PhpProcess.php b/src/Symfony/Component/Process/PhpProcess.php
index efa25e2dbb..6ebf7377ce 100644
--- a/src/Symfony/Component/Process/PhpProcess.php
+++ b/src/Symfony/Component/Process/PhpProcess.php
@@ -37,7 +37,7 @@ class PhpProcess extends Process
         if (false === $php = $php ?? $executableFinder->find(false)) {
             $php = null;
         } else {
-            $php = array_merge(array($php), $executableFinder->findArguments());
+            $php = array_merge([$php], $executableFinder->findArguments());
         }
         if ('phpdbg' === \PHP_SAPI) {
             $file = tempnam(sys_get_temp_dir(), 'dbg');
@@ -65,7 +65,7 @@ class PhpProcess extends Process
     /**
      * {@inheritdoc}
      */
-    public function start(callable $callback = null, array $env = array())
+    public function start(callable $callback = null, array $env = [])
     {
         if (null === $this->getCommandLine()) {
             throw new RuntimeException('Unable to find the PHP executable.');
diff --git a/src/Symfony/Component/Process/Pipes/AbstractPipes.php b/src/Symfony/Component/Process/Pipes/AbstractPipes.php
index e5e26866af..23886b6163 100644
--- a/src/Symfony/Component/Process/Pipes/AbstractPipes.php
+++ b/src/Symfony/Component/Process/Pipes/AbstractPipes.php
@@ -20,7 +20,7 @@ use Symfony\Component\Process\Exception\InvalidArgumentException;
  */
 abstract class AbstractPipes implements PipesInterface
 {
-    public $pipes = array();
+    public $pipes = [];
 
     private $inputBuffer = '';
     private $input;
@@ -49,7 +49,7 @@ abstract class AbstractPipes implements PipesInterface
         foreach ($this->pipes as $pipe) {
             fclose($pipe);
         }
-        $this->pipes = array();
+        $this->pipes = [];
     }
 
     /**
@@ -117,8 +117,8 @@ abstract class AbstractPipes implements PipesInterface
             }
         }
 
-        $r = $e = array();
-        $w = array($this->pipes[0]);
+        $r = $e = [];
+        $w = [$this->pipes[0]];
 
         // let's have a look if something changed in streams
         if (false === @stream_select($r, $w, $e, 0, 0)) {
@@ -130,7 +130,7 @@ abstract class AbstractPipes implements PipesInterface
                 $written = fwrite($stdin, $this->inputBuffer);
                 $this->inputBuffer = substr($this->inputBuffer, $written);
                 if (isset($this->inputBuffer[0])) {
-                    return array($this->pipes[0]);
+                    return [$this->pipes[0]];
                 }
             }
 
@@ -145,7 +145,7 @@ abstract class AbstractPipes implements PipesInterface
                     if (isset($data[0])) {
                         $this->inputBuffer = $data;
 
-                        return array($this->pipes[0]);
+                        return [$this->pipes[0]];
                     }
                 }
                 if (feof($input)) {
@@ -164,7 +164,7 @@ abstract class AbstractPipes implements PipesInterface
             fclose($this->pipes[0]);
             unset($this->pipes[0]);
         } elseif (!$w) {
-            return array($this->pipes[0]);
+            return [$this->pipes[0]];
         }
     }
 
diff --git a/src/Symfony/Component/Process/Pipes/UnixPipes.php b/src/Symfony/Component/Process/Pipes/UnixPipes.php
index 23f873471d..875ee6ab8e 100644
--- a/src/Symfony/Component/Process/Pipes/UnixPipes.php
+++ b/src/Symfony/Component/Process/Pipes/UnixPipes.php
@@ -48,34 +48,34 @@ class UnixPipes extends AbstractPipes
         if (!$this->haveReadSupport) {
             $nullstream = fopen('/dev/null', 'c');
 
-            return array(
-                array('pipe', 'r'),
+            return [
+                ['pipe', 'r'],
                 $nullstream,
                 $nullstream,
-            );
+            ];
         }
 
         if ($this->ttyMode) {
-            return array(
-                array('file', '/dev/tty', 'r'),
-                array('file', '/dev/tty', 'w'),
-                array('file', '/dev/tty', 'w'),
-            );
+            return [
+                ['file', '/dev/tty', 'r'],
+                ['file', '/dev/tty', 'w'],
+                ['file', '/dev/tty', 'w'],
+            ];
         }
 
         if ($this->ptyMode && Process::isPtySupported()) {
-            return array(
-                array('pty'),
-                array('pty'),
-                array('pty'),
-            );
+            return [
+                ['pty'],
+                ['pty'],
+                ['pty'],
+            ];
         }
 
-        return array(
-            array('pipe', 'r'),
-            array('pipe', 'w'), // stdout
-            array('pipe', 'w'), // stderr
-        );
+        return [
+            ['pipe', 'r'],
+            ['pipe', 'w'], // stdout
+            ['pipe', 'w'], // stderr
+        ];
     }
 
     /**
@@ -83,7 +83,7 @@ class UnixPipes extends AbstractPipes
      */
     public function getFiles()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -94,18 +94,18 @@ class UnixPipes extends AbstractPipes
         $this->unblock();
         $w = $this->write();
 
-        $read = $e = array();
+        $read = $e = [];
         $r = $this->pipes;
         unset($r[0]);
 
         // let's have a look if something changed in streams
-        set_error_handler(array($this, 'handleError'));
+        set_error_handler([$this, 'handleError']);
         if (($r || $w) && false === stream_select($r, $w, $e, 0, $blocking ? Process::TIMEOUT_PRECISION * 1E6 : 0)) {
             restore_error_handler();
             // if a system call has been interrupted, forget about it, let's try again
             // otherwise, an error occurred, let's reset pipes
             if (!$this->hasSystemCallBeenInterrupted()) {
-                $this->pipes = array();
+                $this->pipes = [];
             }
 
             return $read;
diff --git a/src/Symfony/Component/Process/Pipes/WindowsPipes.php b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
index 7130589cec..f44f33b490 100644
--- a/src/Symfony/Component/Process/Pipes/WindowsPipes.php
+++ b/src/Symfony/Component/Process/Pipes/WindowsPipes.php
@@ -26,13 +26,13 @@ use Symfony\Component\Process\Process;
  */
 class WindowsPipes extends AbstractPipes
 {
-    private $files = array();
-    private $fileHandles = array();
-    private $lockHandles = array();
-    private $readBytes = array(
+    private $files = [];
+    private $fileHandles = [];
+    private $lockHandles = [];
+    private $readBytes = [
         Process::STDOUT => 0,
         Process::STDERR => 0,
-    );
+    ];
     private $haveReadSupport;
 
     public function __construct($input, bool $haveReadSupport)
@@ -44,10 +44,10 @@ class WindowsPipes extends AbstractPipes
             // Workaround for this problem is to use temporary files instead of pipes on Windows platform.
             //
             // @see https://bugs.php.net/bug.php?id=51800
-            $pipes = array(
+            $pipes = [
                 Process::STDOUT => Process::OUT,
                 Process::STDERR => Process::ERR,
-            );
+            ];
             $tmpDir = sys_get_temp_dir();
             $lastError = 'unknown reason';
             set_error_handler(function ($type, $msg) use (&$lastError) { $lastError = $msg; });
@@ -98,21 +98,21 @@ class WindowsPipes extends AbstractPipes
         if (!$this->haveReadSupport) {
             $nullstream = fopen('NUL', 'c');
 
-            return array(
-                array('pipe', 'r'),
+            return [
+                ['pipe', 'r'],
                 $nullstream,
                 $nullstream,
-            );
+            ];
         }
 
         // We're not using pipe on Windows platform as it hangs (https://bugs.php.net/bug.php?id=51800)
         // We're not using file handles as it can produce corrupted output https://bugs.php.net/bug.php?id=65650
         // So we redirect output within the commandline and pass the nul device to the process
-        return array(
-            array('pipe', 'r'),
-            array('file', 'NUL', 'w'),
-            array('file', 'NUL', 'w'),
-        );
+        return [
+            ['pipe', 'r'],
+            ['file', 'NUL', 'w'],
+            ['file', 'NUL', 'w'],
+        ];
     }
 
     /**
@@ -130,7 +130,7 @@ class WindowsPipes extends AbstractPipes
     {
         $this->unblock();
         $w = $this->write();
-        $read = $r = $e = array();
+        $read = $r = $e = [];
 
         if ($blocking) {
             if ($w) {
@@ -186,6 +186,6 @@ class WindowsPipes extends AbstractPipes
             flock($this->lockHandles[$type], LOCK_UN);
             fclose($this->lockHandles[$type]);
         }
-        $this->fileHandles = $this->lockHandles = array();
+        $this->fileHandles = $this->lockHandles = [];
     }
 }
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
index 666c109ab2..8b7f539e0f 100644
--- a/src/Symfony/Component/Process/Process.php
+++ b/src/Symfony/Component/Process/Process.php
@@ -60,7 +60,7 @@ class Process implements \IteratorAggregate
     private $timeout;
     private $idleTimeout;
     private $exitcode;
-    private $fallbackStatus = array();
+    private $fallbackStatus = [];
     private $processInformation;
     private $outputDisabled = false;
     private $stdout;
@@ -85,7 +85,7 @@ class Process implements \IteratorAggregate
      *
      * User-defined errors must use exit codes in the 64-113 range.
      */
-    public static $exitCodes = array(
+    public static $exitCodes = [
         0 => 'OK',
         1 => 'General error',
         2 => 'Misuse of shell builtins',
@@ -126,7 +126,7 @@ class Process implements \IteratorAggregate
         157 => 'Pollable event',
         // 158 - not defined
         159 => 'Bad syscall',
-    );
+    ];
 
     /**
      * @param array          $command The command to run and its arguments listed as separate entries
@@ -190,7 +190,7 @@ class Process implements \IteratorAggregate
      */
     public static function fromShellCommandline(string $command, string $cwd = null, array $env = null, $input = null, ?float $timeout = 60)
     {
-        $process = new static(array(), $cwd, $env, $input, $timeout);
+        $process = new static([], $cwd, $env, $input, $timeout);
         $process->commandline = $command;
 
         return $process;
@@ -228,7 +228,7 @@ class Process implements \IteratorAggregate
      *
      * @final
      */
-    public function run(callable $callback = null, array $env = array()): int
+    public function run(callable $callback = null, array $env = []): int
     {
         $this->start($callback, $env);
 
@@ -250,7 +250,7 @@ class Process implements \IteratorAggregate
      *
      * @final
      */
-    public function mustRun(callable $callback = null, array $env = array())
+    public function mustRun(callable $callback = null, array $env = [])
     {
         if (0 !== $this->run($callback, $env)) {
             throw new ProcessFailedException($this);
@@ -279,7 +279,7 @@ class Process implements \IteratorAggregate
      * @throws RuntimeException When process is already running
      * @throws LogicException   In case a callback is provided and output has been disabled
      */
-    public function start(callable $callback = null, array $env = array())
+    public function start(callable $callback = null, array $env = [])
     {
         if ($this->isRunning()) {
             throw new RuntimeException('Process is already running');
@@ -292,7 +292,7 @@ class Process implements \IteratorAggregate
         $descriptors = $this->getDescriptors();
 
         if (\is_array($commandline = $this->commandline)) {
-            $commandline = implode(' ', array_map(array($this, 'escapeArgument'), $commandline));
+            $commandline = implode(' ', array_map([$this, 'escapeArgument'], $commandline));
 
             if ('\\' !== \DIRECTORY_SEPARATOR) {
                 // exec is mandatory to deal with sending a signal to the process
@@ -305,14 +305,14 @@ class Process implements \IteratorAggregate
         }
         $env += $this->getDefaultEnv();
 
-        $options = array('suppress_errors' => true);
+        $options = ['suppress_errors' => true];
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
             $options['bypass_shell'] = true;
             $commandline = $this->prepareWindowsCommandLine($commandline, $env);
         } elseif (!$this->useFileHandles && $this->isSigchildEnabled()) {
             // last exit code is output on the fourth pipe and caught to work around --enable-sigchild
-            $descriptors[3] = array('pipe', 'w');
+            $descriptors[3] = ['pipe', 'w'];
 
             // See https://unix.stackexchange.com/questions/71205/background-process-pipe-input
             $commandline = '{ ('.$commandline.') <&3 3<&- 3>/dev/null & } 3<&0;';
@@ -323,7 +323,7 @@ class Process implements \IteratorAggregate
             $ptsWorkaround = fopen(__FILE__, 'r');
         }
 
-        $envPairs = array();
+        $envPairs = [];
         foreach ($env as $k => $v) {
             if (false !== $v) {
                 $envPairs[] = $k.'='.$v;
@@ -371,7 +371,7 @@ class Process implements \IteratorAggregate
      *
      * @final
      */
-    public function restart(callable $callback = null, array $env = array())
+    public function restart(callable $callback = null, array $env = [])
     {
         if ($this->isRunning()) {
             throw new RuntimeException('Process is already running');
@@ -961,7 +961,7 @@ class Process implements \IteratorAggregate
      */
     public function getCommandLine()
     {
-        return \is_array($this->commandline) ? implode(' ', array_map(array($this, 'escapeArgument'), $this->commandline)) : $this->commandline;
+        return \is_array($this->commandline) ? implode(' ', array_map([$this, 'escapeArgument'], $this->commandline)) : $this->commandline;
     }
 
     /**
@@ -1251,7 +1251,7 @@ class Process implements \IteratorAggregate
         static $isTtySupported;
 
         if (null === $isTtySupported) {
-            $isTtySupported = (bool) @proc_open('echo 1 >/dev/null', array(array('file', '/dev/tty', 'r'), array('file', '/dev/tty', 'w'), array('file', '/dev/tty', 'w')), $pipes);
+            $isTtySupported = (bool) @proc_open('echo 1 >/dev/null', [['file', '/dev/tty', 'r'], ['file', '/dev/tty', 'w'], ['file', '/dev/tty', 'w']], $pipes);
         }
 
         return $isTtySupported;
@@ -1274,7 +1274,7 @@ class Process implements \IteratorAggregate
             return $result = false;
         }
 
-        return $result = (bool) @proc_open('echo 1 >/dev/null', array(array('pty'), array('pty'), array('pty')), $pipes);
+        return $result = (bool) @proc_open('echo 1 >/dev/null', [['pty'], ['pty'], ['pty']], $pipes);
     }
 
     /**
@@ -1472,7 +1472,7 @@ class Process implements \IteratorAggregate
         $this->starttime = null;
         $this->callback = null;
         $this->exitcode = null;
-        $this->fallbackStatus = array();
+        $this->fallbackStatus = [];
         $this->processInformation = null;
         $this->stdout = fopen('php://temp/maxmemory:'.(1024 * 1024), 'w+b');
         $this->stderr = fopen('php://temp/maxmemory:'.(1024 * 1024), 'w+b');
@@ -1519,7 +1519,7 @@ class Process implements \IteratorAggregate
                 $ok = @proc_terminate($this->process, $signal);
             } elseif (\function_exists('posix_kill')) {
                 $ok = @posix_kill($pid, $signal);
-            } elseif ($ok = proc_open(sprintf('kill -%d %d', $signal, $pid), array(2 => array('pipe', 'w')), $pipes)) {
+            } elseif ($ok = proc_open(sprintf('kill -%d %d', $signal, $pid), [2 => ['pipe', 'w']], $pipes)) {
                 $ok = false === fgets($pipes[2]);
             }
             if (!$ok) {
@@ -1543,7 +1543,7 @@ class Process implements \IteratorAggregate
     {
         $uid = uniqid('', true);
         $varCount = 0;
-        $varCache = array();
+        $varCache = [];
         $cmd = preg_replace_callback(
             '/"(?:(
                 [^"%!^]*+
@@ -1566,7 +1566,7 @@ class Process implements \IteratorAggregate
                     return '"'.$value.'"';
                 }
 
-                $value = str_replace(array('!LF!', '"^!"', '"^%"', '"^^"', '""'), array("\n", '!', '%', '^', '"'), $value);
+                $value = str_replace(['!LF!', '"^!"', '"^%"', '"^^"', '""'], ["\n", '!', '%', '^', '"'], $value);
                 $value = '"'.preg_replace('/(\\\\*)"/', '$1$1\\"', $value).'"';
                 $var = $uid.++$varCount;
 
@@ -1628,12 +1628,12 @@ class Process implements \IteratorAggregate
         }
         $argument = preg_replace('/(\\\\+)$/', '$1$1', $argument);
 
-        return '"'.str_replace(array('"', '^', '%', '!', "\n"), array('""', '"^^"', '"^%"', '"^!"', '!LF!'), $argument).'"';
+        return '"'.str_replace(['"', '^', '%', '!', "\n"], ['""', '"^^"', '"^%"', '"^!"', '!LF!'], $argument).'"';
     }
 
     private function getDefaultEnv()
     {
-        $env = array();
+        $env = [];
 
         foreach ($_SERVER as $k => $v) {
             if (\is_string($v) && false !== $v = getenv($k)) {
diff --git a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
index c4da39ae6b..6d69a77e08 100644
--- a/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/ExecutableFinderTest.php
@@ -88,7 +88,7 @@ class ExecutableFinderTest extends TestCase
 
         $this->setPath('');
 
-        $extraDirs = array(\dirname(PHP_BINARY));
+        $extraDirs = [\dirname(PHP_BINARY)];
 
         $finder = new ExecutableFinder();
         $result = $finder->find($this->getPhpBinaryName(), null, $extraDirs);
diff --git a/src/Symfony/Component/Process/Tests/KillableProcessWithOutput.php b/src/Symfony/Component/Process/Tests/KillableProcessWithOutput.php
index 2bbc386d0f..28a6a271bb 100644
--- a/src/Symfony/Component/Process/Tests/KillableProcessWithOutput.php
+++ b/src/Symfony/Component/Process/Tests/KillableProcessWithOutput.php
@@ -9,12 +9,12 @@
  * file that was distributed with this source code.
  */
 
-$outputs = array(
+$outputs = [
     'First iteration output',
     'Second iteration output',
     'One more iteration output',
     'This took more time',
-);
+];
 
 $iterationTime = 10000;
 
diff --git a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
index df2560dfc5..338bb4e0c6 100644
--- a/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
+++ b/src/Symfony/Component/Process/Tests/PhpExecutableFinderTest.php
@@ -41,9 +41,9 @@ class PhpExecutableFinderTest extends TestCase
         $f = new PhpExecutableFinder();
 
         if ('phpdbg' === \PHP_SAPI) {
-            $this->assertEquals($f->findArguments(), array('-qrr'), '::findArguments() returns phpdbg arguments');
+            $this->assertEquals($f->findArguments(), ['-qrr'], '::findArguments() returns phpdbg arguments');
         } else {
-            $this->assertEquals($f->findArguments(), array(), '::findArguments() returns no arguments');
+            $this->assertEquals($f->findArguments(), [], '::findArguments() returns no arguments');
         }
     }
 }
diff --git a/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php b/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
index 1ea0e127f7..9ea8981e19 100644
--- a/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
+++ b/src/Symfony/Component/Process/Tests/PipeStdinInStdoutStdErrStreamSelect.php
@@ -14,8 +14,8 @@ define('ERR_TIMEOUT', 2);
 define('ERR_READ_FAILED', 3);
 define('ERR_WRITE_FAILED', 4);
 
-$read = array(STDIN);
-$write = array(STDOUT, STDERR);
+$read = [STDIN];
+$write = [STDOUT, STDERR];
 
 stream_set_blocking(STDIN, 0);
 stream_set_blocking(STDOUT, 0);
@@ -42,7 +42,7 @@ while ($read || $write) {
         $out = (string) substr($out, $written);
     }
     if (null === $read && '' === $out) {
-        $write = array_diff($write, array(STDOUT));
+        $write = array_diff($write, [STDOUT]);
     }
 
     if (in_array(STDERR, $w) && strlen($err) > 0) {
@@ -53,7 +53,7 @@ while ($read || $write) {
         $err = (string) substr($err, $written);
     }
     if (null === $read && '' === $err) {
-        $write = array_diff($write, array(STDERR));
+        $write = array_diff($write, [STDERR]);
     }
 
     if ($r) {
diff --git a/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php b/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
index d8fdb5c1f0..2467c960e8 100644
--- a/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessFailedExceptionTest.php
@@ -24,7 +24,7 @@ class ProcessFailedExceptionTest extends TestCase
      */
     public function testProcessFailedExceptionThrowsException()
     {
-        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(array('isSuccessful'))->setConstructorArgs(array(array('php')))->getMock();
+        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(['isSuccessful'])->setConstructorArgs([['php']])->getMock();
         $process->expects($this->once())
             ->method('isSuccessful')
             ->will($this->returnValue(true));
@@ -52,7 +52,7 @@ class ProcessFailedExceptionTest extends TestCase
         $errorOutput = 'FATAL: Unexpected error';
         $workingDirectory = getcwd();
 
-        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(array('isSuccessful', 'getOutput', 'getErrorOutput', 'getExitCode', 'getExitCodeText', 'isOutputDisabled', 'getWorkingDirectory'))->setConstructorArgs(array(array($cmd)))->getMock();
+        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(['isSuccessful', 'getOutput', 'getErrorOutput', 'getExitCode', 'getExitCodeText', 'isOutputDisabled', 'getWorkingDirectory'])->setConstructorArgs([[$cmd]])->getMock();
         $process->expects($this->once())
             ->method('isSuccessful')
             ->will($this->returnValue(false));
@@ -100,7 +100,7 @@ class ProcessFailedExceptionTest extends TestCase
         $exitText = 'General error';
         $workingDirectory = getcwd();
 
-        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(array('isSuccessful', 'isOutputDisabled', 'getExitCode', 'getExitCodeText', 'getOutput', 'getErrorOutput', 'getWorkingDirectory'))->setConstructorArgs(array(array($cmd)))->getMock();
+        $process = $this->getMockBuilder('Symfony\Component\Process\Process')->setMethods(['isSuccessful', 'isOutputDisabled', 'getExitCode', 'getExitCodeText', 'getOutput', 'getErrorOutput', 'getWorkingDirectory'])->setConstructorArgs([[$cmd]])->getMock();
         $process->expects($this->once())
             ->method('isSuccessful')
             ->will($this->returnValue(false));
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index 60162975fd..5e36e38364 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -55,13 +55,13 @@ class ProcessTest extends TestCase
     {
         try {
             // Check that it works fine if the CWD exists
-            $cmd = new Process(array('echo', 'test'), __DIR__);
+            $cmd = new Process(['echo', 'test'], __DIR__);
             $cmd->run();
         } catch (\Exception $e) {
             $this->fail($e);
         }
 
-        $cmd = new Process(array('echo', 'test'), __DIR__.'/notfound/');
+        $cmd = new Process(['echo', 'test'], __DIR__.'/notfound/');
         $cmd->run();
     }
 
@@ -114,7 +114,7 @@ class ProcessTest extends TestCase
      */
     public function testStopWithTimeoutIsActuallyWorking()
     {
-        $p = $this->getProcess(array(self::$phpBin, __DIR__.'/NonStopableProcess.php', 30));
+        $p = $this->getProcess([self::$phpBin, __DIR__.'/NonStopableProcess.php', 30]);
         $p->start();
 
         while ($p->isRunning() && false === strpos($p->getOutput(), 'received')) {
@@ -135,7 +135,7 @@ class ProcessTest extends TestCase
 
     public function testWaitUntilSpecificOutput()
     {
-        $p = $this->getProcess(array(self::$phpBin, __DIR__.'/KillableProcessWithOutput.php'));
+        $p = $this->getProcess([self::$phpBin, __DIR__.'/KillableProcessWithOutput.php']);
         $p->start();
 
         $start = microtime(true);
@@ -304,10 +304,10 @@ class ProcessTest extends TestCase
 
     public function provideInvalidInputValues()
     {
-        return array(
-            array(array()),
-            array(new NonStringifiable()),
-        );
+        return [
+            [[]],
+            [new NonStringifiable()],
+        ];
     }
 
     /**
@@ -322,25 +322,25 @@ class ProcessTest extends TestCase
 
     public function provideInputValues()
     {
-        return array(
-            array(null, null),
-            array('24.5', 24.5),
-            array('input data', 'input data'),
-        );
+        return [
+            [null, null],
+            ['24.5', 24.5],
+            ['input data', 'input data'],
+        ];
     }
 
     public function chainedCommandsOutputProvider()
     {
         if ('\\' === \DIRECTORY_SEPARATOR) {
-            return array(
-                array("2 \r\n2\r\n", '&&', '2'),
-            );
+            return [
+                ["2 \r\n2\r\n", '&&', '2'],
+            ];
         }
 
-        return array(
-            array("1\n1\n", ';', '1'),
-            array("2\n2\n", '&&', '2'),
-        );
+        return [
+            ["1\n1\n", ';', '1'],
+            ["2\n2\n", '&&', '2'],
+        ];
     }
 
     /**
@@ -409,7 +409,7 @@ class ProcessTest extends TestCase
 
         $p->start();
 
-        foreach (array('foo', 'bar') as $s) {
+        foreach (['foo', 'bar'] as $s) {
             while (false === strpos($p->$getOutput(), $s)) {
                 usleep(1000);
             }
@@ -425,10 +425,10 @@ class ProcessTest extends TestCase
 
     public function provideIncrementalOutput()
     {
-        return array(
-            array('getOutput', 'getIncrementalOutput', 'php://stdout'),
-            array('getErrorOutput', 'getIncrementalErrorOutput', 'php://stderr'),
-        );
+        return [
+            ['getOutput', 'getIncrementalOutput', 'php://stdout'],
+            ['getErrorOutput', 'getIncrementalErrorOutput', 'php://stderr'],
+        ];
     }
 
     public function testGetOutput()
@@ -911,7 +911,7 @@ class ProcessTest extends TestCase
      */
     public function testSignal()
     {
-        $process = $this->getProcess(array(self::$phpBin, __DIR__.'/SignalListener.php'));
+        $process = $this->getProcess([self::$phpBin, __DIR__.'/SignalListener.php']);
         $process->start();
 
         while (false === strpos($process->getOutput(), 'Caught')) {
@@ -971,13 +971,13 @@ class ProcessTest extends TestCase
 
     public function provideMethodsThatNeedARunningProcess()
     {
-        return array(
-            array('getOutput'),
-            array('getIncrementalOutput'),
-            array('getErrorOutput'),
-            array('getIncrementalErrorOutput'),
-            array('wait'),
-        );
+        return [
+            ['getOutput'],
+            ['getIncrementalOutput'],
+            ['getErrorOutput'],
+            ['getIncrementalErrorOutput'],
+            ['wait'],
+        ];
     }
 
     /**
@@ -1002,12 +1002,12 @@ class ProcessTest extends TestCase
 
     public function provideMethodsThatNeedATerminatedProcess()
     {
-        return array(
-            array('hasBeenSignaled'),
-            array('getTermSignal'),
-            array('hasBeenStopped'),
-            array('getStopSignal'),
-        );
+        return [
+            ['hasBeenSignaled'],
+            ['getTermSignal'],
+            ['hasBeenStopped'],
+            ['getStopSignal'],
+        ];
     }
 
     /**
@@ -1118,12 +1118,12 @@ class ProcessTest extends TestCase
 
     public function provideOutputFetchingMethods()
     {
-        return array(
-            array('getOutput'),
-            array('getIncrementalOutput'),
-            array('getErrorOutput'),
-            array('getIncrementalErrorOutput'),
-        );
+        return [
+            ['getOutput'],
+            ['getIncrementalOutput'],
+            ['getErrorOutput'],
+            ['getIncrementalErrorOutput'],
+        ];
     }
 
     public function testStopTerminatesProcessCleanly()
@@ -1155,32 +1155,32 @@ class ProcessTest extends TestCase
 
     public function responsesCodeProvider()
     {
-        return array(
+        return [
             //expected output / getter / code to execute
-            //array(1,'getExitCode','exit(1);'),
-            //array(true,'isSuccessful','exit();'),
-            array('output', 'getOutput', 'echo \'output\';'),
-        );
+            // [1,'getExitCode','exit(1);'],
+            // [true,'isSuccessful','exit();'],
+            ['output', 'getOutput', 'echo \'output\';'],
+        ];
     }
 
     public function pipesCodeProvider()
     {
-        $variations = array(
+        $variations = [
             'fwrite(STDOUT, $in = file_get_contents(\'php://stdin\')); fwrite(STDERR, $in);',
             'include \''.__DIR__.'/PipeStdinInStdoutStdErrStreamSelect.php\';',
-        );
+        ];
 
         if ('\\' === \DIRECTORY_SEPARATOR) {
             // Avoid XL buffers on Windows because of https://bugs.php.net/bug.php?id=65650
-            $sizes = array(1, 2, 4, 8);
+            $sizes = [1, 2, 4, 8];
         } else {
-            $sizes = array(1, 16, 64, 1024, 4096);
+            $sizes = [1, 16, 64, 1024, 4096];
         }
 
-        $codes = array();
+        $codes = [];
         foreach ($sizes as $size) {
             foreach ($variations as $code) {
-                $codes[] = array($code, $size);
+                $codes[] = [$code, $size];
             }
         }
 
@@ -1208,10 +1208,10 @@ class ProcessTest extends TestCase
 
     public function provideVariousIncrementals()
     {
-        return array(
-            array('php://stdout', 'getIncrementalOutput'),
-            array('php://stderr', 'getIncrementalErrorOutput'),
-        );
+        return [
+            ['php://stdout', 'getIncrementalOutput'],
+            ['php://stderr', 'getIncrementalErrorOutput'],
+        ];
     }
 
     public function testIteratorInput()
@@ -1316,32 +1316,32 @@ class ProcessTest extends TestCase
         $process = $this->getProcessForCode('fwrite(STDOUT, 123); fwrite(STDERR, 234); flush(); usleep(10000); fwrite(STDOUT, fread(STDIN, 3)); fwrite(STDERR, 456);');
         $process->setInput($input);
         $process->start();
-        $output = array();
+        $output = [];
 
         foreach ($process as $type => $data) {
-            $output[] = array($type, $data);
+            $output[] = [$type, $data];
             break;
         }
-        $expectedOutput = array(
-            array($process::OUT, '123'),
-        );
+        $expectedOutput = [
+            [$process::OUT, '123'],
+        ];
         $this->assertSame($expectedOutput, $output);
 
         $input->write(345);
 
         foreach ($process as $type => $data) {
-            $output[] = array($type, $data);
+            $output[] = [$type, $data];
         }
 
         $this->assertSame('', $process->getOutput());
         $this->assertFalse($process->isRunning());
 
-        $expectedOutput = array(
-            array($process::OUT, '123'),
-            array($process::ERR, '234'),
-            array($process::OUT, '345'),
-            array($process::ERR, '456'),
-        );
+        $expectedOutput = [
+            [$process::OUT, '123'],
+            [$process::ERR, '234'],
+            [$process::OUT, '345'],
+            [$process::ERR, '456'],
+        ];
         $this->assertSame($expectedOutput, $output);
     }
 
@@ -1352,32 +1352,32 @@ class ProcessTest extends TestCase
         $process = $this->getProcessForCode('fwrite(STDOUT, fread(STDIN, 3));');
         $process->setInput($input);
         $process->start();
-        $output = array();
+        $output = [];
 
         foreach ($process->getIterator($process::ITER_NON_BLOCKING | $process::ITER_KEEP_OUTPUT) as $type => $data) {
-            $output[] = array($type, $data);
+            $output[] = [$type, $data];
             break;
         }
-        $expectedOutput = array(
-            array($process::OUT, ''),
-        );
+        $expectedOutput = [
+            [$process::OUT, ''],
+        ];
         $this->assertSame($expectedOutput, $output);
 
         $input->write(123);
 
         foreach ($process->getIterator($process::ITER_NON_BLOCKING | $process::ITER_KEEP_OUTPUT) as $type => $data) {
             if ('' !== $data) {
-                $output[] = array($type, $data);
+                $output[] = [$type, $data];
             }
         }
 
         $this->assertSame('123', $process->getOutput());
         $this->assertFalse($process->isRunning());
 
-        $expectedOutput = array(
-            array($process::OUT, ''),
-            array($process::OUT, '123'),
-        );
+        $expectedOutput = [
+            [$process::OUT, ''],
+            [$process::OUT, '123'],
+        ];
         $this->assertSame($expectedOutput, $output);
     }
 
@@ -1399,7 +1399,7 @@ class ProcessTest extends TestCase
     public function testSetBadEnv()
     {
         $process = $this->getProcess('echo hello');
-        $process->setEnv(array('bad%%' => '123'));
+        $process->setEnv(['bad%%' => '123']);
         $process->inheritEnvironmentVariables(true);
 
         $process->run();
@@ -1413,7 +1413,7 @@ class ProcessTest extends TestCase
         putenv('existing_var=foo');
         $_ENV['existing_var'] = 'foo';
         $process = $this->getProcess('php -r "echo getenv(\'new_test_var\');"');
-        $process->setEnv(array('existing_var' => 'bar', 'new_test_var' => 'foo'));
+        $process->setEnv(['existing_var' => 'bar', 'new_test_var' => 'foo']);
         $process->inheritEnvironmentVariables();
 
         $process->run();
@@ -1428,14 +1428,14 @@ class ProcessTest extends TestCase
 
     public function testEnvIsInherited()
     {
-        $process = $this->getProcessForCode('echo serialize($_SERVER);', null, array('BAR' => 'BAZ', 'EMPTY' => ''));
+        $process = $this->getProcessForCode('echo serialize($_SERVER);', null, ['BAR' => 'BAZ', 'EMPTY' => '']);
 
         putenv('FOO=BAR');
         $_ENV['FOO'] = 'BAR';
 
         $process->run();
 
-        $expected = array('BAR' => 'BAZ', 'EMPTY' => '', 'FOO' => 'BAR');
+        $expected = ['BAR' => 'BAZ', 'EMPTY' => '', 'FOO' => 'BAR'];
         $env = array_intersect_key(unserialize($process->getOutput()), $expected);
 
         $this->assertEquals($expected, $env);
@@ -1446,7 +1446,7 @@ class ProcessTest extends TestCase
 
     public function testGetCommandLine()
     {
-        $p = new Process(array('/usr/bin/php'));
+        $p = new Process(['/usr/bin/php']);
 
         $expected = '\\' === \DIRECTORY_SEPARATOR ? '"/usr/bin/php"' : "'/usr/bin/php'";
         $this->assertSame($expected, $p->getCommandLine());
@@ -1457,7 +1457,7 @@ class ProcessTest extends TestCase
      */
     public function testEscapeArgument($arg)
     {
-        $p = new Process(array(self::$phpBin, '-r', 'echo $argv[1];', $arg));
+        $p = new Process([self::$phpBin, '-r', 'echo $argv[1];', $arg]);
         $p->run();
 
         $this->assertSame((string) $arg, $p->getOutput());
@@ -1483,24 +1483,24 @@ EOTXT;
 
     public function provideEscapeArgument()
     {
-        yield array('a"b%c%');
-        yield array('a"b^c^');
-        yield array("a\nb'c");
-        yield array('a^b c!');
-        yield array("a!b\tc");
-        yield array('a\\\\"\\"');
-        yield array('éÉèÈàÀöä');
-        yield array(null);
-        yield array(1);
-        yield array(1.1);
+        yield ['a"b%c%'];
+        yield ['a"b^c^'];
+        yield ["a\nb'c"];
+        yield ['a^b c!'];
+        yield ["a!b\tc"];
+        yield ['a\\\\"\\"'];
+        yield ['éÉèÈàÀöä'];
+        yield [null];
+        yield [1];
+        yield [1.1];
     }
 
     public function testEnvArgument()
     {
-        $env = array('FOO' => 'Foo', 'BAR' => 'Bar');
+        $env = ['FOO' => 'Foo', 'BAR' => 'Bar'];
         $cmd = '\\' === \DIRECTORY_SEPARATOR ? 'echo !FOO! !BAR! !BAZ!' : 'echo $FOO $BAR $BAZ';
         $p = Process::fromShellCommandline($cmd, null, $env);
-        $p->run(null, array('BAR' => 'baR', 'BAZ' => 'baZ'));
+        $p->run(null, ['BAR' => 'baR', 'BAZ' => 'baZ']);
 
         $this->assertSame('Foo baR baZ', rtrim($p->getOutput()));
         $this->assertSame($env, $p->getEnv());
@@ -1524,7 +1524,7 @@ EOTXT;
 
     private function getProcessForCode(string $code, string $cwd = null, array $env = null, $input = null, ?int $timeout = 60): Process
     {
-        return $this->getProcess(array(self::$phpBin, '-r', $code), $cwd, $env, $input, $timeout);
+        return $this->getProcess([self::$phpBin, '-r', $code], $cwd, $env, $input, $timeout);
     }
 }
 
diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index 9e08b5afac..f063e8f007 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -62,9 +62,9 @@ class PropertyAccessor implements PropertyAccessorInterface
      */
     private $cacheItemPool;
 
-    private $readPropertyCache = array();
-    private $writePropertyCache = array();
-    private static $resultProto = array(self::VALUE => null);
+    private $readPropertyCache = [];
+    private $writePropertyCache = [];
+    private static $resultProto = [self::VALUE => null];
 
     /**
      * Should not be used by application code. Use
@@ -84,9 +84,9 @@ class PropertyAccessor implements PropertyAccessorInterface
     {
         $propertyPath = $this->getPropertyPath($propertyPath);
 
-        $zval = array(
+        $zval = [
             self::VALUE => $objectOrArray,
-        );
+        ];
         $propertyValues = $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength(), $this->ignoreInvalidIndices);
 
         return $propertyValues[\count($propertyValues) - 1][self::VALUE];
@@ -99,10 +99,10 @@ class PropertyAccessor implements PropertyAccessorInterface
     {
         $propertyPath = $this->getPropertyPath($propertyPath);
 
-        $zval = array(
+        $zval = [
             self::VALUE => $objectOrArray,
             self::REF => &$objectOrArray,
-        );
+        ];
         $propertyValues = $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength() - 1);
         $overwrite = true;
 
@@ -184,9 +184,9 @@ class PropertyAccessor implements PropertyAccessorInterface
         }
 
         try {
-            $zval = array(
+            $zval = [
                 self::VALUE => $objectOrArray,
-            );
+            ];
             $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength(), $this->ignoreInvalidIndices);
 
             return true;
@@ -205,9 +205,9 @@ class PropertyAccessor implements PropertyAccessorInterface
         $propertyPath = $this->getPropertyPath($propertyPath);
 
         try {
-            $zval = array(
+            $zval = [
                 self::VALUE => $objectOrArray,
-            );
+            ];
             $propertyValues = $this->readPropertiesUntil($zval, $propertyPath, $propertyPath->getLength() - 1);
 
             for ($i = \count($propertyValues) - 1; 0 <= $i; --$i) {
@@ -257,7 +257,7 @@ class PropertyAccessor implements PropertyAccessorInterface
         }
 
         // Add the root object to the list
-        $propertyValues = array($zval);
+        $propertyValues = [$zval];
 
         for ($i = 0; $i < $lastIndex; ++$i) {
             $property = $propertyPath->getElement($i);
@@ -282,10 +282,10 @@ class PropertyAccessor implements PropertyAccessorInterface
 
                     if ($i + 1 < $propertyPath->getLength()) {
                         if (isset($zval[self::REF])) {
-                            $zval[self::VALUE][$property] = array();
+                            $zval[self::VALUE][$property] = [];
                             $zval[self::REF] = $zval[self::VALUE];
                         } else {
-                            $zval[self::VALUE] = array($property => array());
+                            $zval[self::VALUE] = [$property => []];
                         }
                     }
                 }
@@ -425,7 +425,7 @@ class PropertyAccessor implements PropertyAccessorInterface
             }
         }
 
-        $access = array();
+        $access = [];
 
         $reflClass = new \ReflectionClass($class);
         $access[self::ACCESS_HAS_PROPERTY] = $reflClass->hasProperty($property);
@@ -460,7 +460,7 @@ class PropertyAccessor implements PropertyAccessorInterface
             $access[self::ACCESS_TYPE] = self::ACCESS_TYPE_MAGIC;
             $access[self::ACCESS_NAME] = $getter;
         } else {
-            $methods = array($getter, $getsetter, $isser, $hasser, '__get');
+            $methods = [$getter, $getsetter, $isser, $hasser, '__get'];
             if ($this->magicCall) {
                 $methods[] = '__call';
             }
@@ -601,7 +601,7 @@ class PropertyAccessor implements PropertyAccessorInterface
             }
         }
 
-        $access = array();
+        $access = [];
 
         $reflClass = new \ReflectionClass($class);
         $access[self::ACCESS_HAS_PROPERTY] = $reflClass->hasProperty($property);
@@ -683,7 +683,7 @@ class PropertyAccessor implements PropertyAccessorInterface
             return false;
         }
 
-        $access = $this->getWriteAccessInfo(\get_class($object), $property, array());
+        $access = $this->getWriteAccessInfo(\get_class($object), $property, []);
 
         $isWritable = self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]
             || self::ACCESS_TYPE_PROPERTY === $access[self::ACCESS_TYPE]
@@ -730,7 +730,7 @@ class PropertyAccessor implements PropertyAccessorInterface
             $removeMethodFound = $this->isMethodAccessible($reflClass, $removeMethod, 1);
 
             if ($addMethodFound && $removeMethodFound) {
-                return array($addMethod, $removeMethod);
+                return [$addMethod, $removeMethod];
             }
         }
     }
diff --git a/src/Symfony/Component/PropertyAccess/PropertyPath.php b/src/Symfony/Component/PropertyAccess/PropertyPath.php
index 2897a4adfa..cb7d4ced85 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyPath.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyPath.php
@@ -32,7 +32,7 @@ class PropertyPath implements \IteratorAggregate, PropertyPathInterface
      *
      * @var array
      */
-    private $elements = array();
+    private $elements = [];
 
     /**
      * The number of elements in the property path.
@@ -47,7 +47,7 @@ class PropertyPath implements \IteratorAggregate, PropertyPathInterface
      *
      * @var array
      */
-    private $isIndex = array();
+    private $isIndex = [];
 
     /**
      * String representation of the path.
diff --git a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
index e17c53c0d2..ede9e6b3a5 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
@@ -18,8 +18,8 @@ use Symfony\Component\PropertyAccess\Exception\OutOfBoundsException;
  */
 class PropertyPathBuilder
 {
-    private $elements = array();
-    private $isIndex = array();
+    private $elements = [];
+    private $isIndex = [];
 
     /**
      * Creates a new property path builder.
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
index d2ff935851..4852e8d58f 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/NonTraversableArrayObject.php
@@ -21,7 +21,7 @@ class NonTraversableArrayObject implements \ArrayAccess, \Countable, \Serializab
 
     public function __construct(array $array = null)
     {
-        $this->array = $array ?: array();
+        $this->array = $array ?: [];
     }
 
     public function offsetExists($offset)
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
index db17f3f612..d8a8c76483 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
@@ -21,7 +21,7 @@ class TestSingularAndPluralProps
     private $email;
 
     /** @var array */
-    private $emails = array();
+    private $emails = [];
 
     /**
      * @return string|null
@@ -60,6 +60,6 @@ class TestSingularAndPluralProps
      */
     public function removeEmail($email)
     {
-        $this->emails = array_diff($this->emails, array($email));
+        $this->emails = array_diff($this->emails, [$email]);
     }
 }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
index 6758f18fbc..9803a11f84 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TraversableArrayObject.php
@@ -21,7 +21,7 @@ class TraversableArrayObject implements \ArrayAccess, \IteratorAggregate, \Count
 
     public function __construct(array $array = null)
     {
-        $this->array = $array ?: array();
+        $this->array = $array ?: [];
     }
 
     public function offsetExists($offset)
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
index b0ed69c859..3c007fde93 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorArrayAccessTest.php
@@ -31,10 +31,10 @@ abstract class PropertyAccessorArrayAccessTest extends TestCase
 
     public function getValidPropertyPaths()
     {
-        return array(
-            array($this->getContainer(array('firstName' => 'Bernhard')), '[firstName]', 'Bernhard'),
-            array($this->getContainer(array('person' => $this->getContainer(array('firstName' => 'Bernhard')))), '[person][firstName]', 'Bernhard'),
-        );
+        return [
+            [$this->getContainer(['firstName' => 'Bernhard']), '[firstName]', 'Bernhard'],
+            [$this->getContainer(['person' => $this->getContainer(['firstName' => 'Bernhard'])]), '[person][firstName]', 'Bernhard'],
+        ];
     }
 
     /**
@@ -54,7 +54,7 @@ abstract class PropertyAccessorArrayAccessTest extends TestCase
             ->enableExceptionOnInvalidIndex()
             ->getPropertyAccessor();
 
-        $object = $this->getContainer(array('firstName' => 'Bernhard'));
+        $object = $this->getContainer(['firstName' => 'Bernhard']);
 
         $this->propertyAccessor->getValue($object, '[lastName]');
     }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
index 8a7ab1042b..1aee259a76 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorCollectionTest.php
@@ -102,9 +102,9 @@ abstract class PropertyAccessorCollectionTest extends PropertyAccessorArrayAcces
 {
     public function testSetValueCallsAdderAndRemoverForCollections()
     {
-        $axesBefore = $this->getContainer(array(1 => 'second', 3 => 'fourth', 4 => 'fifth'));
-        $axesMerged = $this->getContainer(array(1 => 'first', 2 => 'second', 3 => 'third'));
-        $axesAfter = $this->getContainer(array(1 => 'second', 5 => 'first', 6 => 'third'));
+        $axesBefore = $this->getContainer([1 => 'second', 3 => 'fourth', 4 => 'fifth']);
+        $axesMerged = $this->getContainer([1 => 'first', 2 => 'second', 3 => 'third']);
+        $axesAfter = $this->getContainer([1 => 'second', 5 => 'first', 6 => 'third']);
         $axesMergedCopy = \is_object($axesMerged) ? clone $axesMerged : $axesMerged;
 
         // Don't use a mock in order to test whether the collections are
@@ -123,8 +123,8 @@ abstract class PropertyAccessorCollectionTest extends PropertyAccessorArrayAcces
     {
         $car = $this->getMockBuilder(__CLASS__.'_CompositeCar')->getMock();
         $structure = $this->getMockBuilder(__CLASS__.'_CarStructure')->getMock();
-        $axesBefore = $this->getContainer(array(1 => 'second', 3 => 'fourth'));
-        $axesAfter = $this->getContainer(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $axesBefore = $this->getContainer([1 => 'second', 3 => 'fourth']);
+        $axesAfter = $this->getContainer([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $car->expects($this->any())
             ->method('getStructure')
@@ -153,8 +153,8 @@ abstract class PropertyAccessorCollectionTest extends PropertyAccessorArrayAcces
     public function testSetValueFailsIfNoAdderNorRemoverFound()
     {
         $car = $this->getMockBuilder(__CLASS__.'_CarNoAdderAndRemover')->getMock();
-        $axesBefore = $this->getContainer(array(1 => 'second', 3 => 'fourth'));
-        $axesAfter = $this->getContainer(array(0 => 'first', 1 => 'second', 2 => 'third'));
+        $axesBefore = $this->getContainer([1 => 'second', 3 => 'fourth']);
+        $axesAfter = $this->getContainer([0 => 'first', 1 => 'second', 2 => 'third']);
 
         $car->expects($this->any())
             ->method('getAxes')
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
index 3f2bb4e9ea..5151489eb0 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
@@ -40,47 +40,47 @@ class PropertyAccessorTest extends TestCase
 
     public function getPathsWithUnexpectedType()
     {
-        return array(
-            array('', 'foobar'),
-            array('foo', 'foobar'),
-            array(null, 'foobar'),
-            array(123, 'foobar'),
-            array((object) array('prop' => null), 'prop.foobar'),
-            array((object) array('prop' => (object) array('subProp' => null)), 'prop.subProp.foobar'),
-            array(array('index' => null), '[index][foobar]'),
-            array(array('index' => array('subIndex' => null)), '[index][subIndex][foobar]'),
-        );
+        return [
+            ['', 'foobar'],
+            ['foo', 'foobar'],
+            [null, 'foobar'],
+            [123, 'foobar'],
+            [(object) ['prop' => null], 'prop.foobar'],
+            [(object) ['prop' => (object) ['subProp' => null]], 'prop.subProp.foobar'],
+            [['index' => null], '[index][foobar]'],
+            [['index' => ['subIndex' => null]], '[index][subIndex][foobar]'],
+        ];
     }
 
     public function getPathsWithMissingProperty()
     {
-        return array(
-            array((object) array('firstName' => 'Bernhard'), 'lastName'),
-            array((object) array('property' => (object) array('firstName' => 'Bernhard')), 'property.lastName'),
-            array(array('index' => (object) array('firstName' => 'Bernhard')), '[index].lastName'),
-            array(new TestClass('Bernhard'), 'protectedProperty'),
-            array(new TestClass('Bernhard'), 'privateProperty'),
-            array(new TestClass('Bernhard'), 'protectedAccessor'),
-            array(new TestClass('Bernhard'), 'protectedIsAccessor'),
-            array(new TestClass('Bernhard'), 'protectedHasAccessor'),
-            array(new TestClass('Bernhard'), 'privateAccessor'),
-            array(new TestClass('Bernhard'), 'privateIsAccessor'),
-            array(new TestClass('Bernhard'), 'privateHasAccessor'),
+        return [
+            [(object) ['firstName' => 'Bernhard'], 'lastName'],
+            [(object) ['property' => (object) ['firstName' => 'Bernhard']], 'property.lastName'],
+            [['index' => (object) ['firstName' => 'Bernhard']], '[index].lastName'],
+            [new TestClass('Bernhard'), 'protectedProperty'],
+            [new TestClass('Bernhard'), 'privateProperty'],
+            [new TestClass('Bernhard'), 'protectedAccessor'],
+            [new TestClass('Bernhard'), 'protectedIsAccessor'],
+            [new TestClass('Bernhard'), 'protectedHasAccessor'],
+            [new TestClass('Bernhard'), 'privateAccessor'],
+            [new TestClass('Bernhard'), 'privateIsAccessor'],
+            [new TestClass('Bernhard'), 'privateHasAccessor'],
 
             // Properties are not camelized
-            array(new TestClass('Bernhard'), 'public_property'),
-        );
+            [new TestClass('Bernhard'), 'public_property'],
+        ];
     }
 
     public function getPathsWithMissingIndex()
     {
-        return array(
-            array(array('firstName' => 'Bernhard'), '[lastName]'),
-            array(array(), '[index][lastName]'),
-            array(array('index' => array()), '[index][lastName]'),
-            array(array('index' => array('firstName' => 'Bernhard')), '[index][lastName]'),
-            array((object) array('property' => array('firstName' => 'Bernhard')), 'property[lastName]'),
-        );
+        return [
+            [['firstName' => 'Bernhard'], '[lastName]'],
+            [[], '[index][lastName]'],
+            [['index' => []], '[index][lastName]'],
+            [['index' => ['firstName' => 'Bernhard']], '[index][lastName]'],
+            [(object) ['property' => ['firstName' => 'Bernhard']], 'property[lastName]'],
+        ];
     }
 
     /**
@@ -134,10 +134,10 @@ class PropertyAccessorTest extends TestCase
     public function testGetValueReadsArrayWithMissingIndexForCustomPropertyPath()
     {
         $object = new \ArrayObject();
-        $array = array('child' => array('index' => $object));
+        $array = ['child' => ['index' => $object]];
 
         $this->assertNull($this->propertyAccessor->getValue($array, '[child][index][foo][bar]'));
-        $this->assertSame(array(), $object->getArrayCopy());
+        $this->assertSame([], $object->getArrayCopy());
     }
 
     // https://github.com/symfony/symfony/pull/4450
@@ -149,24 +149,24 @@ class PropertyAccessorTest extends TestCase
     public function testGetValueNotModifyObject()
     {
         $object = new \stdClass();
-        $object->firstName = array('Bernhard');
+        $object->firstName = ['Bernhard'];
 
         $this->assertNull($this->propertyAccessor->getValue($object, 'firstName[1]'));
-        $this->assertSame(array('Bernhard'), $object->firstName);
+        $this->assertSame(['Bernhard'], $object->firstName);
     }
 
     public function testGetValueNotModifyObjectException()
     {
         $propertyAccessor = new PropertyAccessor(false, true);
         $object = new \stdClass();
-        $object->firstName = array('Bernhard');
+        $object->firstName = ['Bernhard'];
 
         try {
             $propertyAccessor->getValue($object, 'firstName[1]');
         } catch (NoSuchIndexException $e) {
         }
 
-        $this->assertSame(array('Bernhard'), $object->firstName);
+        $this->assertSame(['Bernhard'], $object->firstName);
     }
 
     /**
@@ -289,7 +289,7 @@ class PropertyAccessorTest extends TestCase
 
         $this->propertyAccessor->setValue($author, 'magicCallProperty', 'Updated');
 
-        $this->assertEquals('Updated', $author->__call('getMagicCallProperty', array()));
+        $this->assertEquals('Updated', $author->__call('getMagicCallProperty', []));
     }
 
     /**
@@ -305,7 +305,7 @@ class PropertyAccessorTest extends TestCase
     public function testGetValueWhenArrayValueIsNull()
     {
         $this->propertyAccessor = new PropertyAccessor(false, true);
-        $this->assertNull($this->propertyAccessor->getValue(array('index' => array('nullable' => null)), '[index][nullable]'));
+        $this->assertNull($this->propertyAccessor->getValue(['index' => ['nullable' => null]], '[index][nullable]'));
     }
 
     /**
@@ -432,47 +432,47 @@ class PropertyAccessorTest extends TestCase
 
     public function getValidPropertyPaths()
     {
-        return array(
-            array(array('Bernhard', 'Schussek'), '[0]', 'Bernhard'),
-            array(array('Bernhard', 'Schussek'), '[1]', 'Schussek'),
-            array(array('firstName' => 'Bernhard'), '[firstName]', 'Bernhard'),
-            array(array('index' => array('firstName' => 'Bernhard')), '[index][firstName]', 'Bernhard'),
-            array((object) array('firstName' => 'Bernhard'), 'firstName', 'Bernhard'),
-            array((object) array('property' => array('firstName' => 'Bernhard')), 'property[firstName]', 'Bernhard'),
-            array(array('index' => (object) array('firstName' => 'Bernhard')), '[index].firstName', 'Bernhard'),
-            array((object) array('property' => (object) array('firstName' => 'Bernhard')), 'property.firstName', 'Bernhard'),
+        return [
+            [['Bernhard', 'Schussek'], '[0]', 'Bernhard'],
+            [['Bernhard', 'Schussek'], '[1]', 'Schussek'],
+            [['firstName' => 'Bernhard'], '[firstName]', 'Bernhard'],
+            [['index' => ['firstName' => 'Bernhard']], '[index][firstName]', 'Bernhard'],
+            [(object) ['firstName' => 'Bernhard'], 'firstName', 'Bernhard'],
+            [(object) ['property' => ['firstName' => 'Bernhard']], 'property[firstName]', 'Bernhard'],
+            [['index' => (object) ['firstName' => 'Bernhard']], '[index].firstName', 'Bernhard'],
+            [(object) ['property' => (object) ['firstName' => 'Bernhard']], 'property.firstName', 'Bernhard'],
 
             // Accessor methods
-            array(new TestClass('Bernhard'), 'publicProperty', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicAccessor', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicAccessorWithDefaultValue', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicAccessorWithRequiredAndDefaultValue', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicIsAccessor', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicHasAccessor', 'Bernhard'),
-            array(new TestClass('Bernhard'), 'publicGetSetter', 'Bernhard'),
+            [new TestClass('Bernhard'), 'publicProperty', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicAccessor', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicAccessorWithDefaultValue', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicAccessorWithRequiredAndDefaultValue', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicIsAccessor', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicHasAccessor', 'Bernhard'],
+            [new TestClass('Bernhard'), 'publicGetSetter', 'Bernhard'],
 
             // Methods are camelized
-            array(new TestClass('Bernhard'), 'public_accessor', 'Bernhard'),
-            array(new TestClass('Bernhard'), '_public_accessor', 'Bernhard'),
+            [new TestClass('Bernhard'), 'public_accessor', 'Bernhard'],
+            [new TestClass('Bernhard'), '_public_accessor', 'Bernhard'],
 
             // Missing indices
-            array(array('index' => array()), '[index][firstName]', null),
-            array(array('root' => array('index' => array())), '[root][index][firstName]', null),
+            [['index' => []], '[index][firstName]', null],
+            [['root' => ['index' => []]], '[root][index][firstName]', null],
 
             // Special chars
-            array(array('%!@$§.' => 'Bernhard'), '[%!@$§.]', 'Bernhard'),
-            array(array('index' => array('%!@$§.' => 'Bernhard')), '[index][%!@$§.]', 'Bernhard'),
-            array((object) array('%!@$§' => 'Bernhard'), '%!@$§', 'Bernhard'),
-            array((object) array('property' => (object) array('%!@$§' => 'Bernhard')), 'property.%!@$§', 'Bernhard'),
+            [['%!@$§.' => 'Bernhard'], '[%!@$§.]', 'Bernhard'],
+            [['index' => ['%!@$§.' => 'Bernhard']], '[index][%!@$§.]', 'Bernhard'],
+            [(object) ['%!@$§' => 'Bernhard'], '%!@$§', 'Bernhard'],
+            [(object) ['property' => (object) ['%!@$§' => 'Bernhard']], 'property.%!@$§', 'Bernhard'],
 
             // nested objects and arrays
-            array(array('foo' => new TestClass('bar')), '[foo].publicGetSetter', 'bar'),
-            array(new TestClass(array('foo' => 'bar')), 'publicGetSetter[foo]', 'bar'),
-            array(new TestClass(new TestClass('bar')), 'publicGetter.publicGetSetter', 'bar'),
-            array(new TestClass(array('foo' => new TestClass('bar'))), 'publicGetter[foo].publicGetSetter', 'bar'),
-            array(new TestClass(new TestClass(new TestClass('bar'))), 'publicGetter.publicGetter.publicGetSetter', 'bar'),
-            array(new TestClass(array('foo' => array('baz' => new TestClass('bar')))), 'publicGetter[foo][baz].publicGetSetter', 'bar'),
-        );
+            [['foo' => new TestClass('bar')], '[foo].publicGetSetter', 'bar'],
+            [new TestClass(['foo' => 'bar']), 'publicGetSetter[foo]', 'bar'],
+            [new TestClass(new TestClass('bar')), 'publicGetter.publicGetSetter', 'bar'],
+            [new TestClass(['foo' => new TestClass('bar')]), 'publicGetter[foo].publicGetSetter', 'bar'],
+            [new TestClass(new TestClass(new TestClass('bar'))), 'publicGetter.publicGetter.publicGetSetter', 'bar'],
+            [new TestClass(['foo' => ['baz' => new TestClass('bar')]]), 'publicGetter[foo][baz].publicGetSetter', 'bar'],
+        ];
     }
 
     public function testTicket5755()
@@ -487,20 +487,20 @@ class PropertyAccessorTest extends TestCase
     public function testSetValueDeepWithMagicGetter()
     {
         $obj = new TestClassMagicGet('foo');
-        $obj->publicProperty = array('foo' => array('bar' => 'some_value'));
+        $obj->publicProperty = ['foo' => ['bar' => 'some_value']];
         $this->propertyAccessor->setValue($obj, 'publicProperty[foo][bar]', 'Updated');
         $this->assertSame('Updated', $obj->publicProperty['foo']['bar']);
     }
 
     public function getReferenceChainObjectsForSetValue()
     {
-        return array(
-            array(array('a' => array('b' => array('c' => 'old-value'))), '[a][b][c]', 'new-value'),
-            array(new TestClassSetValue(new TestClassSetValue('old-value')), 'value.value', 'new-value'),
-            array(new TestClassSetValue(array('a' => array('b' => array('c' => new TestClassSetValue('old-value'))))), 'value[a][b][c].value', 'new-value'),
-            array(new TestClassSetValue(array('a' => array('b' => 'old-value'))), 'value[a][b]', 'new-value'),
-            array(new \ArrayIterator(array('a' => array('b' => array('c' => 'old-value')))), '[a][b][c]', 'new-value'),
-        );
+        return [
+            [['a' => ['b' => ['c' => 'old-value']]], '[a][b][c]', 'new-value'],
+            [new TestClassSetValue(new TestClassSetValue('old-value')), 'value.value', 'new-value'],
+            [new TestClassSetValue(['a' => ['b' => ['c' => new TestClassSetValue('old-value')]]]), 'value[a][b][c].value', 'new-value'],
+            [new TestClassSetValue(['a' => ['b' => 'old-value']]), 'value[a][b]', 'new-value'],
+            [new \ArrayIterator(['a' => ['b' => ['c' => 'old-value']]]), '[a][b][c]', 'new-value'],
+        ];
     }
 
     /**
@@ -515,11 +515,11 @@ class PropertyAccessorTest extends TestCase
 
     public function getReferenceChainObjectsForIsWritable()
     {
-        return array(
-            array(new TestClassIsWritable(array('a' => array('b' => 'old-value'))), 'value[a][b]', false),
-            array(new TestClassIsWritable(new \ArrayIterator(array('a' => array('b' => 'old-value')))), 'value[a][b]', true),
-            array(new TestClassIsWritable(array('a' => array('b' => array('c' => new TestClassSetValue('old-value'))))), 'value[a][b][c].value', true),
-        );
+        return [
+            [new TestClassIsWritable(['a' => ['b' => 'old-value']]), 'value[a][b]', false],
+            [new TestClassIsWritable(new \ArrayIterator(['a' => ['b' => 'old-value']])), 'value[a][b]', true],
+            [new TestClassIsWritable(['a' => ['b' => ['c' => new TestClassSetValue('old-value')]]]), 'value[a][b][c].value', true],
+        ];
     }
 
     /**
@@ -563,12 +563,12 @@ class PropertyAccessorTest extends TestCase
 
     public function testArrayNotBeeingOverwritten()
     {
-        $value = array('value1' => 'foo', 'value2' => 'bar');
+        $value = ['value1' => 'foo', 'value2' => 'bar'];
         $object = new TestClass($value);
 
         $this->propertyAccessor->setValue($object, 'publicAccessor[value2]', 'baz');
         $this->assertSame('baz', $this->propertyAccessor->getValue($object, 'publicAccessor[value2]'));
-        $this->assertSame(array('value1' => 'foo', 'value2' => 'baz'), $object->getPublicAccessor());
+        $this->assertSame(['value1' => 'foo', 'value2' => 'baz'], $object->getPublicAccessor());
     }
 
     public function testCacheReadAccess()
@@ -677,7 +677,7 @@ class PropertyAccessorTest extends TestCase
     {
         $object = new ReturnTyped();
 
-        $this->propertyAccessor->setValue($object, 'foos', array(new \DateTime()));
+        $this->propertyAccessor->setValue($object, 'foos', [new \DateTime()]);
     }
 
     /**
@@ -706,9 +706,9 @@ class PropertyAccessorTest extends TestCase
         $object = new TestSingularAndPluralProps();
 
         $this->propertyAccessor->isWritable($object, 'emails'); //cache access info
-        $this->propertyAccessor->setValue($object, 'emails', array('test@email.com'));
+        $this->propertyAccessor->setValue($object, 'emails', ['test@email.com']);
 
-        $this->assertEquals(array('test@email.com'), $object->getEmails());
+        $this->assertEquals(['test@email.com'], $object->getEmails());
         $this->assertNull($object->getEmail());
     }
 
@@ -717,9 +717,9 @@ class PropertyAccessorTest extends TestCase
         $object = new TestPluralAdderRemoverAndSetter();
 
         $this->propertyAccessor->isWritable($object, 'emails'); //cache access info
-        $this->propertyAccessor->setValue($object, 'emails', array('test@email.com'));
+        $this->propertyAccessor->setValue($object, 'emails', ['test@email.com']);
 
-        $this->assertEquals(array('test@email.com'), $object->getEmails());
+        $this->assertEquals(['test@email.com'], $object->getEmails());
     }
 
     public function testAdderAndRemoverArePreferredOverSetterForSameSingularAndPlural()
@@ -727,8 +727,8 @@ class PropertyAccessorTest extends TestCase
         $object = new TestPluralAdderRemoverAndSetterSameSingularAndPlural();
 
         $this->propertyAccessor->isWritable($object, 'aircraft'); //cache access info
-        $this->propertyAccessor->setValue($object, 'aircraft', array('aeroplane'));
+        $this->propertyAccessor->setValue($object, 'aircraft', ['aeroplane']);
 
-        $this->assertEquals(array('aeroplane'), $object->getAircraft());
+        $this->assertEquals(['aeroplane'], $object->getAircraft());
     }
 }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
index 44822699a8..287b4b1f83 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathBuilderTest.php
@@ -204,10 +204,10 @@ class PropertyPathBuilderTest extends TestCase
 
     public function provideInvalidOffsets()
     {
-        return array(
-            array(6),
-            array(-7),
-        );
+        return [
+            [6],
+            [-7],
+        ];
     }
 
     public function testReplaceWithLengthGreaterOne()
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
index 6c5c6b22a2..c58ebf510c 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyPathTest.php
@@ -41,15 +41,15 @@ class PropertyPathTest extends TestCase
 
     public function providePathsContainingUnexpectedCharacters()
     {
-        return array(
-            array('property.'),
-            array('property.['),
-            array('property..'),
-            array('property['),
-            array('property[['),
-            array('property[.'),
-            array('property[]'),
-        );
+        return [
+            ['property.'],
+            ['property.['],
+            ['property..'],
+            ['property['],
+            ['property[['],
+            ['property[.'],
+            ['property[]'],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php
index ecb3f9b4a9..300e48e0d4 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetter.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\PropertyAccess\Tests;
 
 class TestPluralAdderRemoverAndSetter
 {
-    private $emails = array();
+    private $emails = [];
 
     public function getEmails()
     {
@@ -22,7 +22,7 @@ class TestPluralAdderRemoverAndSetter
 
     public function setEmails(array $emails)
     {
-        $this->emails = array('foo@email.com');
+        $this->emails = ['foo@email.com'];
     }
 
     public function addEmail($email)
@@ -32,6 +32,6 @@ class TestPluralAdderRemoverAndSetter
 
     public function removeEmail($email)
     {
-        $this->emails = array_diff($this->emails, array($email));
+        $this->emails = array_diff($this->emails, [$email]);
     }
 }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php
index bb3b4f4688..84eb9c9e75 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/TestPluralAdderRemoverAndSetterSameSingularAndPlural.php
@@ -4,7 +4,7 @@ namespace Symfony\Component\PropertyAccess\Tests;
 
 class TestPluralAdderRemoverAndSetterSameSingularAndPlural
 {
-    private $aircraft = array();
+    private $aircraft = [];
 
     public function getAircraft()
     {
@@ -13,7 +13,7 @@ class TestPluralAdderRemoverAndSetterSameSingularAndPlural
 
     public function setAircraft(array $aircraft)
     {
-        $this->aircraft = array('plane');
+        $this->aircraft = ['plane'];
     }
 
     public function addAircraft($aircraft)
@@ -23,6 +23,6 @@ class TestPluralAdderRemoverAndSetterSameSingularAndPlural
 
     public function removeAircraft($aircraft)
     {
-        $this->aircraft = array_diff($this->aircraft, array($aircraft));
+        $this->aircraft = array_diff($this->aircraft, [$aircraft]);
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/PhpDocExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/PhpDocExtractor.php
index cdb111bf02..4837d2200c 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/PhpDocExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/PhpDocExtractor.php
@@ -36,7 +36,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
     /**
      * @var DocBlock[]
      */
-    private $docBlocks = array();
+    private $docBlocks = [];
 
     private $docBlockFactory;
     private $contextFactory;
@@ -68,7 +68,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
     /**
      * {@inheritdoc}
      */
-    public function getShortDescription($class, $property, array $context = array())
+    public function getShortDescription($class, $property, array $context = [])
     {
         /** @var $docBlock DocBlock */
         list($docBlock) = $this->getDocBlock($class, $property);
@@ -94,7 +94,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
     /**
      * {@inheritdoc}
      */
-    public function getLongDescription($class, $property, array $context = array())
+    public function getLongDescription($class, $property, array $context = [])
     {
         /** @var $docBlock DocBlock */
         list($docBlock) = $this->getDocBlock($class, $property);
@@ -110,7 +110,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
         /** @var $docBlock DocBlock */
         list($docBlock, $source, $prefix) = $this->getDocBlock($class, $property);
@@ -132,7 +132,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
                 break;
         }
 
-        $types = array();
+        $types = [];
         /** @var DocBlock\Tags\Var_|DocBlock\Tags\Return_|DocBlock\Tags\Param $tag */
         foreach ($docBlock->getTagsByName($tag) as $tag) {
             if ($tag && null !== $tag->getType()) {
@@ -148,7 +148,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
             return $types;
         }
 
-        return array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), $types[0]));
+        return [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), $types[0])];
     }
 
     private function getDocBlock(string $class, string $property): array
@@ -163,19 +163,19 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
 
         switch (true) {
             case $docBlock = $this->getDocBlockFromProperty($class, $property):
-                $data = array($docBlock, self::PROPERTY, null);
+                $data = [$docBlock, self::PROPERTY, null];
                 break;
 
             case list($docBlock) = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::ACCESSOR):
-                $data = array($docBlock, self::ACCESSOR, null);
+                $data = [$docBlock, self::ACCESSOR, null];
                 break;
 
             case list($docBlock, $prefix) = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::MUTATOR):
-                $data = array($docBlock, self::MUTATOR, $prefix);
+                $data = [$docBlock, self::MUTATOR, $prefix];
                 break;
 
             default:
-                $data = array(null, null, null);
+                $data = [null, null, null];
         }
 
         return $this->docBlocks[$propertyHash] = $data;
@@ -227,7 +227,7 @@ class PhpDocExtractor implements PropertyDescriptionExtractorInterface, Property
         }
 
         try {
-            return array($this->docBlockFactory->create($reflectionMethod, $this->contextFactory->createFromReflector($reflectionMethod)), $prefix);
+            return [$this->docBlockFactory->create($reflectionMethod, $this->contextFactory->createFromReflector($reflectionMethod)), $prefix];
         } catch (\InvalidArgumentException $e) {
             return null;
         }
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
index b74a6115aa..0ed1e4e2af 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
@@ -30,17 +30,17 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * @internal
      */
-    public static $defaultMutatorPrefixes = array('add', 'remove', 'set');
+    public static $defaultMutatorPrefixes = ['add', 'remove', 'set'];
 
     /**
      * @internal
      */
-    public static $defaultAccessorPrefixes = array('is', 'can', 'get', 'has');
+    public static $defaultAccessorPrefixes = ['is', 'can', 'get', 'has'];
 
     /**
      * @internal
      */
-    public static $defaultArrayMutatorPrefixes = array('add', 'remove');
+    public static $defaultArrayMutatorPrefixes = ['add', 'remove'];
 
     private $mutatorPrefixes;
     private $accessorPrefixes;
@@ -63,7 +63,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
         try {
             $reflectionClass = new \ReflectionClass($class);
@@ -73,7 +73,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
 
         $reflectionProperties = $reflectionClass->getProperties();
 
-        $properties = array();
+        $properties = [];
         foreach ($reflectionProperties as $reflectionProperty) {
             if ($reflectionProperty->isPublic()) {
                 $properties[$reflectionProperty->name] = $reflectionProperty->name;
@@ -101,7 +101,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
         if ($fromMutator = $this->extractFromMutator($class, $property)) {
             return $fromMutator;
@@ -122,7 +122,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * {@inheritdoc}
      */
-    public function isReadable($class, $property, array $context = array())
+    public function isReadable($class, $property, array $context = [])
     {
         if ($this->isPublicProperty($class, $property)) {
             return true;
@@ -136,7 +136,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * {@inheritdoc}
      */
-    public function isWritable($class, $property, array $context = array())
+    public function isWritable($class, $property, array $context = [])
     {
         if ($this->isPublicProperty($class, $property)) {
             return true;
@@ -150,7 +150,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
     /**
      * {@inheritdoc}
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool
+    public function isInitializable(string $class, string $property, array $context = []): ?bool
     {
         try {
             $reflectionClass = new \ReflectionClass($class);
@@ -197,7 +197,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
             $type = new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), $type);
         }
 
-        return array($type);
+        return [$type];
     }
 
     /**
@@ -213,11 +213,11 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
         }
 
         if ($reflectionType = $reflectionMethod->getReturnType()) {
-            return array($this->extractFromReflectionType($reflectionType, $reflectionMethod));
+            return [$this->extractFromReflectionType($reflectionType, $reflectionMethod)];
         }
 
-        if (\in_array($prefix, array('is', 'can', 'has'))) {
-            return array(new Type(Type::BUILTIN_TYPE_BOOL));
+        if (\in_array($prefix, ['is', 'can', 'has'])) {
+            return [new Type(Type::BUILTIN_TYPE_BOOL)];
         }
 
         return null;
@@ -248,7 +248,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
             }
             $reflectionType = $parameter->getType();
 
-            return $reflectionType ? array($this->extractFromReflectionType($reflectionType, $constructor)) : null;
+            return $reflectionType ? [$this->extractFromReflectionType($reflectionType, $constructor)] : null;
         }
 
         if ($parentClass = $reflectionClass->getParentClass()) {
@@ -319,7 +319,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
                 }
 
                 if (0 === $reflectionMethod->getNumberOfRequiredParameters()) {
-                    return array($reflectionMethod, $prefix);
+                    return [$reflectionMethod, $prefix];
                 }
             } catch (\ReflectionException $e) {
                 // Return null if the property doesn't exist
@@ -339,7 +339,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
         $ucSingulars = (array) Inflector::singularize($ucProperty);
 
         foreach ($this->mutatorPrefixes as $prefix) {
-            $names = array($ucProperty);
+            $names = [$ucProperty];
             if (\in_array($prefix, $this->arrayMutatorPrefixes)) {
                 $names = array_merge($names, $ucSingulars);
             }
@@ -353,7 +353,7 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
 
                     // Parameter can be optional to allow things like: method(array $foo = null)
                     if ($reflectionMethod->getNumberOfParameters() >= 1) {
-                        return array($reflectionMethod, $prefix);
+                        return [$reflectionMethod, $prefix];
                     }
                 } catch (\ReflectionException $e) {
                     // Try the next prefix if the method doesn't exist
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
index 7a311e6b08..98d75f0a93 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/SerializerExtractor.php
@@ -33,7 +33,7 @@ class SerializerExtractor implements PropertyListExtractorInterface
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
         if (!isset($context['serializer_groups']) || !\is_array($context['serializer_groups'])) {
             return;
@@ -43,7 +43,7 @@ class SerializerExtractor implements PropertyListExtractorInterface
             return;
         }
 
-        $properties = array();
+        $properties = [];
         $serializerClassMetadata = $this->classMetadataFactory->getMetadataFor($class);
 
         foreach ($serializerClassMetadata->getAttributesMetadata() as $serializerAttributeMetadata) {
diff --git a/src/Symfony/Component/PropertyInfo/PropertyAccessExtractorInterface.php b/src/Symfony/Component/PropertyInfo/PropertyAccessExtractorInterface.php
index ecf44d9d65..49d5afb032 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyAccessExtractorInterface.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyAccessExtractorInterface.php
@@ -27,7 +27,7 @@ interface PropertyAccessExtractorInterface
      *
      * @return bool|null
      */
-    public function isReadable($class, $property, array $context = array());
+    public function isReadable($class, $property, array $context = []);
 
     /**
      * Is the property writable?
@@ -38,5 +38,5 @@ interface PropertyAccessExtractorInterface
      *
      * @return bool|null
      */
-    public function isWritable($class, $property, array $context = array());
+    public function isWritable($class, $property, array $context = []);
 }
diff --git a/src/Symfony/Component/PropertyInfo/PropertyDescriptionExtractorInterface.php b/src/Symfony/Component/PropertyInfo/PropertyDescriptionExtractorInterface.php
index 3f400a8fa5..385e772b9f 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyDescriptionExtractorInterface.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyDescriptionExtractorInterface.php
@@ -27,7 +27,7 @@ interface PropertyDescriptionExtractorInterface
      *
      * @return string|null
      */
-    public function getShortDescription($class, $property, array $context = array());
+    public function getShortDescription($class, $property, array $context = []);
 
     /**
      * Gets the long description of the property.
@@ -38,5 +38,5 @@ interface PropertyDescriptionExtractorInterface
      *
      * @return string|null
      */
-    public function getLongDescription($class, $property, array $context = array());
+    public function getLongDescription($class, $property, array $context = []);
 }
diff --git a/src/Symfony/Component/PropertyInfo/PropertyInfoCacheExtractor.php b/src/Symfony/Component/PropertyInfo/PropertyInfoCacheExtractor.php
index 61794d3194..ac883e7c04 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyInfoCacheExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyInfoCacheExtractor.php
@@ -24,7 +24,7 @@ class PropertyInfoCacheExtractor implements PropertyInfoExtractorInterface, Prop
 {
     private $propertyInfoExtractor;
     private $cacheItemPool;
-    private $arrayCache = array();
+    private $arrayCache = [];
 
     public function __construct(PropertyInfoExtractorInterface $propertyInfoExtractor, CacheItemPoolInterface $cacheItemPool)
     {
@@ -35,57 +35,57 @@ class PropertyInfoCacheExtractor implements PropertyInfoExtractorInterface, Prop
     /**
      * {@inheritdoc}
      */
-    public function isReadable($class, $property, array $context = array())
+    public function isReadable($class, $property, array $context = [])
     {
-        return $this->extract('isReadable', array($class, $property, $context));
+        return $this->extract('isReadable', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isWritable($class, $property, array $context = array())
+    public function isWritable($class, $property, array $context = [])
     {
-        return $this->extract('isWritable', array($class, $property, $context));
+        return $this->extract('isWritable', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getShortDescription($class, $property, array $context = array())
+    public function getShortDescription($class, $property, array $context = [])
     {
-        return $this->extract('getShortDescription', array($class, $property, $context));
+        return $this->extract('getShortDescription', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getLongDescription($class, $property, array $context = array())
+    public function getLongDescription($class, $property, array $context = [])
     {
-        return $this->extract('getLongDescription', array($class, $property, $context));
+        return $this->extract('getLongDescription', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
-        return $this->extract('getProperties', array($class, $context));
+        return $this->extract('getProperties', [$class, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
-        return $this->extract('getTypes', array($class, $property, $context));
+        return $this->extract('getTypes', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool
+    public function isInitializable(string $class, string $property, array $context = []): ?bool
     {
-        return $this->extract('isInitializable', array($class, $property, $context));
+        return $this->extract('isInitializable', [$class, $property, $context]);
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyInfo/PropertyInfoExtractor.php b/src/Symfony/Component/PropertyInfo/PropertyInfoExtractor.php
index a31278cfde..d7de8d2644 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyInfoExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyInfoExtractor.php
@@ -33,7 +33,7 @@ class PropertyInfoExtractor implements PropertyInfoExtractorInterface, PropertyI
      * @param iterable|PropertyAccessExtractorInterface[]        $accessExtractors
      * @param iterable|PropertyInitializableExtractorInterface[] $initializableExtractors
      */
-    public function __construct(iterable $listExtractors = array(), iterable $typeExtractors = array(), iterable $descriptionExtractors = array(), iterable $accessExtractors = array(), iterable $initializableExtractors = array())
+    public function __construct(iterable $listExtractors = [], iterable $typeExtractors = [], iterable $descriptionExtractors = [], iterable $accessExtractors = [], iterable $initializableExtractors = [])
     {
         $this->listExtractors = $listExtractors;
         $this->typeExtractors = $typeExtractors;
@@ -45,57 +45,57 @@ class PropertyInfoExtractor implements PropertyInfoExtractorInterface, PropertyI
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
-        return $this->extract($this->listExtractors, 'getProperties', array($class, $context));
+        return $this->extract($this->listExtractors, 'getProperties', [$class, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getShortDescription($class, $property, array $context = array())
+    public function getShortDescription($class, $property, array $context = [])
     {
-        return $this->extract($this->descriptionExtractors, 'getShortDescription', array($class, $property, $context));
+        return $this->extract($this->descriptionExtractors, 'getShortDescription', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getLongDescription($class, $property, array $context = array())
+    public function getLongDescription($class, $property, array $context = [])
     {
-        return $this->extract($this->descriptionExtractors, 'getLongDescription', array($class, $property, $context));
+        return $this->extract($this->descriptionExtractors, 'getLongDescription', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
-        return $this->extract($this->typeExtractors, 'getTypes', array($class, $property, $context));
+        return $this->extract($this->typeExtractors, 'getTypes', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isReadable($class, $property, array $context = array())
+    public function isReadable($class, $property, array $context = [])
     {
-        return $this->extract($this->accessExtractors, 'isReadable', array($class, $property, $context));
+        return $this->extract($this->accessExtractors, 'isReadable', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isWritable($class, $property, array $context = array())
+    public function isWritable($class, $property, array $context = [])
     {
-        return $this->extract($this->accessExtractors, 'isWritable', array($class, $property, $context));
+        return $this->extract($this->accessExtractors, 'isWritable', [$class, $property, $context]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool
+    public function isInitializable(string $class, string $property, array $context = []): ?bool
     {
-        return $this->extract($this->initializableExtractors, 'isInitializable', array($class, $property, $context));
+        return $this->extract($this->initializableExtractors, 'isInitializable', [$class, $property, $context]);
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyInfo/PropertyInitializableExtractorInterface.php b/src/Symfony/Component/PropertyInfo/PropertyInitializableExtractorInterface.php
index c00ca35c23..13248fc194 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyInitializableExtractorInterface.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyInitializableExtractorInterface.php
@@ -21,5 +21,5 @@ interface PropertyInitializableExtractorInterface
     /**
      * Is the property initializable? Returns true if a constructor's parameter matches the given property name.
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool;
+    public function isInitializable(string $class, string $property, array $context = []): ?bool;
 }
diff --git a/src/Symfony/Component/PropertyInfo/PropertyListExtractorInterface.php b/src/Symfony/Component/PropertyInfo/PropertyListExtractorInterface.php
index 1faae33d02..2c831731cf 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyListExtractorInterface.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyListExtractorInterface.php
@@ -26,5 +26,5 @@ interface PropertyListExtractorInterface
      *
      * @return string[]|null
      */
-    public function getProperties($class, array $context = array());
+    public function getProperties($class, array $context = []);
 }
diff --git a/src/Symfony/Component/PropertyInfo/PropertyTypeExtractorInterface.php b/src/Symfony/Component/PropertyInfo/PropertyTypeExtractorInterface.php
index 8aa08b4e85..c970530f2e 100644
--- a/src/Symfony/Component/PropertyInfo/PropertyTypeExtractorInterface.php
+++ b/src/Symfony/Component/PropertyInfo/PropertyTypeExtractorInterface.php
@@ -27,5 +27,5 @@ interface PropertyTypeExtractorInterface
      *
      * @return Type[]|null
      */
-    public function getTypes($class, $property, array $context = array());
+    public function getTypes($class, $property, array $context = []);
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/AbstractPropertyInfoExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/AbstractPropertyInfoExtractorTest.php
index 6006798020..928e867dec 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/AbstractPropertyInfoExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/AbstractPropertyInfoExtractorTest.php
@@ -30,7 +30,7 @@ class AbstractPropertyInfoExtractorTest extends TestCase
 
     protected function setUp()
     {
-        $extractors = array(new NullExtractor(), new DummyExtractor());
+        $extractors = [new NullExtractor(), new DummyExtractor()];
         $this->propertyInfo = new PropertyInfoExtractor($extractors, $extractors, $extractors, $extractors, $extractors);
     }
 
@@ -45,36 +45,36 @@ class AbstractPropertyInfoExtractorTest extends TestCase
 
     public function testGetShortDescription()
     {
-        $this->assertSame('short', $this->propertyInfo->getShortDescription('Foo', 'bar', array()));
+        $this->assertSame('short', $this->propertyInfo->getShortDescription('Foo', 'bar', []));
     }
 
     public function testGetLongDescription()
     {
-        $this->assertSame('long', $this->propertyInfo->getLongDescription('Foo', 'bar', array()));
+        $this->assertSame('long', $this->propertyInfo->getLongDescription('Foo', 'bar', []));
     }
 
     public function testGetTypes()
     {
-        $this->assertEquals(array(new Type(Type::BUILTIN_TYPE_INT)), $this->propertyInfo->getTypes('Foo', 'bar', array()));
+        $this->assertEquals([new Type(Type::BUILTIN_TYPE_INT)], $this->propertyInfo->getTypes('Foo', 'bar', []));
     }
 
     public function testIsReadable()
     {
-        $this->assertTrue($this->propertyInfo->isReadable('Foo', 'bar', array()));
+        $this->assertTrue($this->propertyInfo->isReadable('Foo', 'bar', []));
     }
 
     public function testIsWritable()
     {
-        $this->assertTrue($this->propertyInfo->isWritable('Foo', 'bar', array()));
+        $this->assertTrue($this->propertyInfo->isWritable('Foo', 'bar', []));
     }
 
     public function testGetProperties()
     {
-        $this->assertEquals(array('a', 'b'), $this->propertyInfo->getProperties('Foo'));
+        $this->assertEquals(['a', 'b'], $this->propertyInfo->getProperties('Foo'));
     }
 
     public function testIsInitializable()
     {
-        $this->assertTrue($this->propertyInfo->isInitializable('Foo', 'bar', array()));
+        $this->assertTrue($this->propertyInfo->isInitializable('Foo', 'bar', []));
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/DependencyInjection/PropertyInfoPassTest.php b/src/Symfony/Component/PropertyInfo/Tests/DependencyInjection/PropertyInfoPassTest.php
index 29feddce55..aea826e210 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/DependencyInjection/PropertyInfoPassTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/DependencyInjection/PropertyInfoPassTest.php
@@ -26,46 +26,46 @@ class PropertyInfoPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $definition = $container->register('property_info')->setArguments(array(null, null, null, null, null));
-        $container->register('n2')->addTag($tag, array('priority' => 100));
-        $container->register('n1')->addTag($tag, array('priority' => 200));
+        $definition = $container->register('property_info')->setArguments([null, null, null, null, null]);
+        $container->register('n2')->addTag($tag, ['priority' => 100]);
+        $container->register('n1')->addTag($tag, ['priority' => 200]);
         $container->register('n3')->addTag($tag);
 
         $propertyInfoPass = new PropertyInfoPass();
         $propertyInfoPass->process($container);
 
-        $expected = new IteratorArgument(array(
+        $expected = new IteratorArgument([
             new Reference('n1'),
             new Reference('n2'),
             new Reference('n3'),
-        ));
+        ]);
         $this->assertEquals($expected, $definition->getArgument($index));
     }
 
     public function provideTags()
     {
-        return array(
-            array(0, 'property_info.list_extractor'),
-            array(1, 'property_info.type_extractor'),
-            array(2, 'property_info.description_extractor'),
-            array(3, 'property_info.access_extractor'),
-            array(4, 'property_info.initializable_extractor'),
-        );
+        return [
+            [0, 'property_info.list_extractor'],
+            [1, 'property_info.type_extractor'],
+            [2, 'property_info.description_extractor'],
+            [3, 'property_info.access_extractor'],
+            [4, 'property_info.initializable_extractor'],
+        ];
     }
 
     public function testReturningEmptyArrayWhenNoService()
     {
         $container = new ContainerBuilder();
         $propertyInfoExtractorDefinition = $container->register('property_info')
-            ->setArguments(array(array(), array(), array(), array(), array()));
+            ->setArguments([[], [], [], [], []]);
 
         $propertyInfoPass = new PropertyInfoPass();
         $propertyInfoPass->process($container);
 
-        $this->assertEquals(new IteratorArgument(array()), $propertyInfoExtractorDefinition->getArgument(0));
-        $this->assertEquals(new IteratorArgument(array()), $propertyInfoExtractorDefinition->getArgument(1));
-        $this->assertEquals(new IteratorArgument(array()), $propertyInfoExtractorDefinition->getArgument(2));
-        $this->assertEquals(new IteratorArgument(array()), $propertyInfoExtractorDefinition->getArgument(3));
-        $this->assertEquals(new IteratorArgument(array()), $propertyInfoExtractorDefinition->getArgument(4));
+        $this->assertEquals(new IteratorArgument([]), $propertyInfoExtractorDefinition->getArgument(0));
+        $this->assertEquals(new IteratorArgument([]), $propertyInfoExtractorDefinition->getArgument(1));
+        $this->assertEquals(new IteratorArgument([]), $propertyInfoExtractorDefinition->getArgument(2));
+        $this->assertEquals(new IteratorArgument([]), $propertyInfoExtractorDefinition->getArgument(3));
+        $this->assertEquals(new IteratorArgument([]), $propertyInfoExtractorDefinition->getArgument(4));
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
index d4f514bd7e..930dc6e24c 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php
@@ -51,50 +51,50 @@ class PhpDocExtractorTest extends TestCase
      */
     public function testExtractTypesWithNoPrefixes($property, array $type = null)
     {
-        $noPrefixExtractor = new PhpDocExtractor(null, array(), array(), array());
+        $noPrefixExtractor = new PhpDocExtractor(null, [], [], []);
 
         $this->assertEquals($type, $noPrefixExtractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property));
     }
 
     public function typesProvider()
     {
-        return array(
-            array('foo', null, 'Short description.', 'Long description.'),
-            array('bar', array(new Type(Type::BUILTIN_TYPE_STRING)), 'This is bar', null),
-            array('baz', array(new Type(Type::BUILTIN_TYPE_INT)), 'Should be used.', null),
-            array('foo2', array(new Type(Type::BUILTIN_TYPE_FLOAT)), null, null),
-            array('foo3', array(new Type(Type::BUILTIN_TYPE_CALLABLE)), null, null),
-            array('foo4', array(new Type(Type::BUILTIN_TYPE_NULL)), null, null),
-            array('foo5', null, null, null),
-            array(
+        return [
+            ['foo', null, 'Short description.', 'Long description.'],
+            ['bar', [new Type(Type::BUILTIN_TYPE_STRING)], 'This is bar', null],
+            ['baz', [new Type(Type::BUILTIN_TYPE_INT)], 'Should be used.', null],
+            ['foo2', [new Type(Type::BUILTIN_TYPE_FLOAT)], null, null],
+            ['foo3', [new Type(Type::BUILTIN_TYPE_CALLABLE)], null, null],
+            ['foo4', [new Type(Type::BUILTIN_TYPE_NULL)], null, null],
+            ['foo5', null, null, null],
+            [
                 'files',
-                array(
+                [
                     new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'SplFileInfo')),
                     new Type(Type::BUILTIN_TYPE_RESOURCE),
-                ),
+                ],
                 null,
                 null,
-            ),
-            array('bal', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')), null, null),
-            array('parent', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')), null, null),
-            array('collection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))), null, null),
-            array('nestedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))), null, null),
-            array('mixedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)), null, null),
-            array('a', array(new Type(Type::BUILTIN_TYPE_INT)), 'A.', null),
-            array('b', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')), 'B.', null),
-            array('c', array(new Type(Type::BUILTIN_TYPE_BOOL, true)), null, null),
-            array('d', array(new Type(Type::BUILTIN_TYPE_BOOL)), null, null),
-            array('e', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_RESOURCE))), null, null),
-            array('f', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))), null, null),
-            array('g', array(new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)), 'Nullable array.', null),
-            array('h', array(new Type(Type::BUILTIN_TYPE_STRING, true)), null, null),
-            array('i', array(new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)), null, null),
-            array('j', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')), null, null),
-            array('donotexist', null, null, null),
-            array('staticGetter', null, null, null),
-            array('staticSetter', null, null, null),
-            array('emptyVar', null, null, null),
-        );
+            ],
+            ['bal', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')], null, null],
+            ['parent', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')], null, null],
+            ['collection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))], null, null],
+            ['nestedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))], null, null],
+            ['mixedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)], null, null],
+            ['a', [new Type(Type::BUILTIN_TYPE_INT)], 'A.', null],
+            ['b', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')], 'B.', null],
+            ['c', [new Type(Type::BUILTIN_TYPE_BOOL, true)], null, null],
+            ['d', [new Type(Type::BUILTIN_TYPE_BOOL)], null, null],
+            ['e', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_RESOURCE))], null, null],
+            ['f', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))], null, null],
+            ['g', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)], 'Nullable array.', null],
+            ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
+            ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
+            ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['donotexist', null, null, null],
+            ['staticGetter', null, null, null],
+            ['staticSetter', null, null, null],
+            ['emptyVar', null, null, null],
+        ];
     }
 
     /**
@@ -111,23 +111,23 @@ class PhpDocExtractorTest extends TestCase
 
     public function provideCollectionTypes()
     {
-        return array(
-            array('iteratorCollection', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Iterator', true, null, new Type(Type::BUILTIN_TYPE_STRING))), null, null),
-            array('iteratorCollectionWithKey', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Iterator', true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))), null, null),
-            array(
+        return [
+            ['iteratorCollection', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Iterator', true, null, new Type(Type::BUILTIN_TYPE_STRING))], null, null],
+            ['iteratorCollectionWithKey', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Iterator', true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))], null, null],
+            [
                 'nestedIterators',
-                array(new Type(
+                [new Type(
                     Type::BUILTIN_TYPE_OBJECT,
                     false,
                     'Iterator',
                     true,
                     new Type(Type::BUILTIN_TYPE_INT),
                     new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Iterator', true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))
-                )),
+                )],
                 null,
                 null,
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -135,89 +135,89 @@ class PhpDocExtractorTest extends TestCase
      */
     public function testExtractTypesWithCustomPrefixes($property, array $type = null)
     {
-        $customExtractor = new PhpDocExtractor(null, array('add', 'remove'), array('is', 'can'));
+        $customExtractor = new PhpDocExtractor(null, ['add', 'remove'], ['is', 'can']);
 
         $this->assertEquals($type, $customExtractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property));
     }
 
     public function typesWithCustomPrefixesProvider()
     {
-        return array(
-            array('foo', null, 'Short description.', 'Long description.'),
-            array('bar', array(new Type(Type::BUILTIN_TYPE_STRING)), 'This is bar', null),
-            array('baz', array(new Type(Type::BUILTIN_TYPE_INT)), 'Should be used.', null),
-            array('foo2', array(new Type(Type::BUILTIN_TYPE_FLOAT)), null, null),
-            array('foo3', array(new Type(Type::BUILTIN_TYPE_CALLABLE)), null, null),
-            array('foo4', array(new Type(Type::BUILTIN_TYPE_NULL)), null, null),
-            array('foo5', null, null, null),
-            array(
+        return [
+            ['foo', null, 'Short description.', 'Long description.'],
+            ['bar', [new Type(Type::BUILTIN_TYPE_STRING)], 'This is bar', null],
+            ['baz', [new Type(Type::BUILTIN_TYPE_INT)], 'Should be used.', null],
+            ['foo2', [new Type(Type::BUILTIN_TYPE_FLOAT)], null, null],
+            ['foo3', [new Type(Type::BUILTIN_TYPE_CALLABLE)], null, null],
+            ['foo4', [new Type(Type::BUILTIN_TYPE_NULL)], null, null],
+            ['foo5', null, null, null],
+            [
                 'files',
-                array(
+                [
                     new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'SplFileInfo')),
                     new Type(Type::BUILTIN_TYPE_RESOURCE),
-                ),
+                ],
                 null,
                 null,
-            ),
-            array('bal', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')), null, null),
-            array('parent', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')), null, null),
-            array('collection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))), null, null),
-            array('nestedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))), null, null),
-            array('mixedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)), null, null),
-            array('a', null, 'A.', null),
-            array('b', null, 'B.', null),
-            array('c', array(new Type(Type::BUILTIN_TYPE_BOOL, true)), null, null),
-            array('d', array(new Type(Type::BUILTIN_TYPE_BOOL)), null, null),
-            array('e', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_RESOURCE))), null, null),
-            array('f', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))), null, null),
-            array('g', array(new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)), 'Nullable array.', null),
-            array('h', array(new Type(Type::BUILTIN_TYPE_STRING, true)), null, null),
-            array('i', array(new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)), null, null),
-            array('j', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')), null, null),
-            array('donotexist', null, null, null),
-            array('staticGetter', null, null, null),
-            array('staticSetter', null, null, null),
-        );
+            ],
+            ['bal', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')], null, null],
+            ['parent', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')], null, null],
+            ['collection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))], null, null],
+            ['nestedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))], null, null],
+            ['mixedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)], null, null],
+            ['a', null, 'A.', null],
+            ['b', null, 'B.', null],
+            ['c', [new Type(Type::BUILTIN_TYPE_BOOL, true)], null, null],
+            ['d', [new Type(Type::BUILTIN_TYPE_BOOL)], null, null],
+            ['e', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_RESOURCE))], null, null],
+            ['f', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))], null, null],
+            ['g', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)], 'Nullable array.', null],
+            ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
+            ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
+            ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['donotexist', null, null, null],
+            ['staticGetter', null, null, null],
+            ['staticSetter', null, null, null],
+        ];
     }
 
     public function typesWithNoPrefixesProvider()
     {
-        return array(
-            array('foo', null, 'Short description.', 'Long description.'),
-            array('bar', array(new Type(Type::BUILTIN_TYPE_STRING)), 'This is bar', null),
-            array('baz', array(new Type(Type::BUILTIN_TYPE_INT)), 'Should be used.', null),
-            array('foo2', array(new Type(Type::BUILTIN_TYPE_FLOAT)), null, null),
-            array('foo3', array(new Type(Type::BUILTIN_TYPE_CALLABLE)), null, null),
-            array('foo4', array(new Type(Type::BUILTIN_TYPE_NULL)), null, null),
-            array('foo5', null, null, null),
-            array(
+        return [
+            ['foo', null, 'Short description.', 'Long description.'],
+            ['bar', [new Type(Type::BUILTIN_TYPE_STRING)], 'This is bar', null],
+            ['baz', [new Type(Type::BUILTIN_TYPE_INT)], 'Should be used.', null],
+            ['foo2', [new Type(Type::BUILTIN_TYPE_FLOAT)], null, null],
+            ['foo3', [new Type(Type::BUILTIN_TYPE_CALLABLE)], null, null],
+            ['foo4', [new Type(Type::BUILTIN_TYPE_NULL)], null, null],
+            ['foo5', null, null, null],
+            [
                 'files',
-                array(
+                [
                     new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'SplFileInfo')),
                     new Type(Type::BUILTIN_TYPE_RESOURCE),
-                ),
+                ],
                 null,
                 null,
-            ),
-            array('bal', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')), null, null),
-            array('parent', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')), null, null),
-            array('collection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))), null, null),
-            array('nestedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))), null, null),
-            array('mixedCollection', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)), null, null),
-            array('a', null, 'A.', null),
-            array('b', null, 'B.', null),
-            array('c', null, null, null),
-            array('d', null, null, null),
-            array('e', null, null, null),
-            array('f', null, null, null),
-            array('g', array(new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)), 'Nullable array.', null),
-            array('h', array(new Type(Type::BUILTIN_TYPE_STRING, true)), null, null),
-            array('i', array(new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)), null, null),
-            array('j', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')), null, null),
-            array('donotexist', null, null, null),
-            array('staticGetter', null, null, null),
-            array('staticSetter', null, null, null),
-        );
+            ],
+            ['bal', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')], null, null],
+            ['parent', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')], null, null],
+            ['collection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))], null, null],
+            ['nestedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING, false)))], null, null],
+            ['mixedCollection', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, null, null)], null, null],
+            ['a', null, 'A.', null],
+            ['b', null, 'B.', null],
+            ['c', null, null, null],
+            ['d', null, null, null],
+            ['e', null, null, null],
+            ['f', null, null, null],
+            ['g', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)], 'Nullable array.', null],
+            ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
+            ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
+            ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['donotexist', null, null, null],
+            ['staticGetter', null, null, null],
+            ['staticSetter', null, null, null],
+        ];
     }
 
     public function testReturnNullOnEmptyDocBlock()
@@ -227,17 +227,17 @@ class PhpDocExtractorTest extends TestCase
 
     public function dockBlockFallbackTypesProvider()
     {
-        return array(
-            'pub' => array(
-                'pub', array(new Type(Type::BUILTIN_TYPE_STRING)),
-            ),
-            'protAcc' => array(
-                'protAcc', array(new Type(Type::BUILTIN_TYPE_INT)),
-            ),
-            'protMut' => array(
-                'protMut', array(new Type(Type::BUILTIN_TYPE_BOOL)),
-            ),
-        );
+        return [
+            'pub' => [
+                'pub', [new Type(Type::BUILTIN_TYPE_STRING)],
+            ],
+            'protAcc' => [
+                'protAcc', [new Type(Type::BUILTIN_TYPE_INT)],
+            ],
+            'protMut' => [
+                'protMut', [new Type(Type::BUILTIN_TYPE_BOOL)],
+            ],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
index 762b0fed48..e58c70d41d 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
@@ -37,7 +37,7 @@ class ReflectionExtractorTest extends TestCase
     public function testGetProperties()
     {
         $this->assertSame(
-            array(
+            [
                 'bal',
                 'parent',
                 'collection',
@@ -69,7 +69,7 @@ class ReflectionExtractorTest extends TestCase
                 'd',
                 'e',
                 'f',
-            ),
+            ],
             $this->extractor->getProperties('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy')
         );
 
@@ -78,10 +78,10 @@ class ReflectionExtractorTest extends TestCase
 
     public function testGetPropertiesWithCustomPrefixes()
     {
-        $customExtractor = new ReflectionExtractor(array('add', 'remove'), array('is', 'can'));
+        $customExtractor = new ReflectionExtractor(['add', 'remove'], ['is', 'can']);
 
         $this->assertSame(
-            array(
+            [
                 'bal',
                 'parent',
                 'collection',
@@ -107,17 +107,17 @@ class ReflectionExtractorTest extends TestCase
                 'd',
                 'e',
                 'f',
-            ),
+            ],
             $customExtractor->getProperties('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy')
         );
     }
 
     public function testGetPropertiesWithNoPrefixes()
     {
-        $noPrefixExtractor = new ReflectionExtractor(array(), array(), array());
+        $noPrefixExtractor = new ReflectionExtractor([], [], []);
 
         $this->assertSame(
-            array(
+            [
                 'bal',
                 'parent',
                 'collection',
@@ -139,7 +139,7 @@ class ReflectionExtractorTest extends TestCase
                 'foo4',
                 'foo5',
                 'files',
-            ),
+            ],
             $noPrefixExtractor->getProperties('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy')
         );
     }
@@ -149,24 +149,24 @@ class ReflectionExtractorTest extends TestCase
      */
     public function testExtractors($property, array $type = null)
     {
-        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, array()));
+        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, []));
     }
 
     public function typesProvider()
     {
-        return array(
-            array('a', null),
-            array('b', array(new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy'))),
-            array('c', array(new Type(Type::BUILTIN_TYPE_BOOL))),
-            array('d', array(new Type(Type::BUILTIN_TYPE_BOOL))),
-            array('e', null),
-            array('f', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime')))),
-            array('donotexist', null),
-            array('staticGetter', null),
-            array('staticSetter', null),
-            array('self', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy'))),
-            array('realParent', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy'))),
-        );
+        return [
+            ['a', null],
+            ['b', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')]],
+            ['c', [new Type(Type::BUILTIN_TYPE_BOOL)]],
+            ['d', [new Type(Type::BUILTIN_TYPE_BOOL)]],
+            ['e', null],
+            ['f', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_OBJECT, false, 'DateTime'))]],
+            ['donotexist', null],
+            ['staticGetter', null],
+            ['staticSetter', null],
+            ['self', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy')]],
+            ['realParent', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\ParentDummy')]],
+        ];
     }
 
     /**
@@ -174,19 +174,19 @@ class ReflectionExtractorTest extends TestCase
      */
     public function testExtractPhp7Type($property, array $type = null)
     {
-        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php7Dummy', $property, array()));
+        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php7Dummy', $property, []));
     }
 
     public function php7TypesProvider()
     {
-        return array(
-            array('foo', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true))),
-            array('bar', array(new Type(Type::BUILTIN_TYPE_INT))),
-            array('baz', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING)))),
-            array('buz', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\Php7Dummy'))),
-            array('biz', array(new Type(Type::BUILTIN_TYPE_OBJECT, false, 'stdClass'))),
-            array('donotexist', null),
-        );
+        return [
+            ['foo', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true)]],
+            ['bar', [new Type(Type::BUILTIN_TYPE_INT)]],
+            ['baz', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))]],
+            ['buz', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'Symfony\Component\PropertyInfo\Tests\Fixtures\Php7Dummy')]],
+            ['biz', [new Type(Type::BUILTIN_TYPE_OBJECT, false, 'stdClass')]],
+            ['donotexist', null],
+        ];
     }
 
     /**
@@ -194,18 +194,18 @@ class ReflectionExtractorTest extends TestCase
      */
     public function testExtractPhp71Type($property, array $type = null)
     {
-        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php71Dummy', $property, array()));
+        $this->assertEquals($type, $this->extractor->getTypes('Symfony\Component\PropertyInfo\Tests\Fixtures\Php71Dummy', $property, []));
     }
 
     public function php71TypesProvider()
     {
-        return array(
-            array('foo', array(new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true))),
-            array('buz', array(new Type(Type::BUILTIN_TYPE_NULL))),
-            array('bar', array(new Type(Type::BUILTIN_TYPE_INT, true))),
-            array('baz', array(new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING)))),
-            array('donotexist', null),
-        );
+        return [
+            ['foo', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true)]],
+            ['buz', [new Type(Type::BUILTIN_TYPE_NULL)]],
+            ['bar', [new Type(Type::BUILTIN_TYPE_INT, true)]],
+            ['baz', [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_STRING))]],
+            ['donotexist', null],
+        ];
     }
 
     /**
@@ -215,27 +215,27 @@ class ReflectionExtractorTest extends TestCase
     {
         $this->assertSame(
             $expected,
-            $this->extractor->isReadable('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, array())
+            $this->extractor->isReadable('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, [])
         );
     }
 
     public function getReadableProperties()
     {
-        return array(
-            array('bar', false),
-            array('baz', false),
-            array('parent', true),
-            array('a', true),
-            array('b', false),
-            array('c', true),
-            array('d', true),
-            array('e', false),
-            array('f', false),
-            array('Id', true),
-            array('id', true),
-            array('Guid', true),
-            array('guid', false),
-        );
+        return [
+            ['bar', false],
+            ['baz', false],
+            ['parent', true],
+            ['a', true],
+            ['b', false],
+            ['c', true],
+            ['d', true],
+            ['e', false],
+            ['f', false],
+            ['Id', true],
+            ['id', true],
+            ['Guid', true],
+            ['guid', false],
+        ];
     }
 
     /**
@@ -245,33 +245,33 @@ class ReflectionExtractorTest extends TestCase
     {
         $this->assertSame(
             $expected,
-            $this->extractor->isWritable('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, array())
+            $this->extractor->isWritable('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', $property, [])
         );
     }
 
     public function getWritableProperties()
     {
-        return array(
-            array('bar', false),
-            array('baz', false),
-            array('parent', true),
-            array('a', false),
-            array('b', true),
-            array('c', false),
-            array('d', false),
-            array('e', true),
-            array('f', true),
-            array('Id', false),
-            array('Guid', true),
-            array('guid', false),
-        );
+        return [
+            ['bar', false],
+            ['baz', false],
+            ['parent', true],
+            ['a', false],
+            ['b', true],
+            ['c', false],
+            ['d', false],
+            ['e', true],
+            ['f', true],
+            ['Id', false],
+            ['Guid', true],
+            ['guid', false],
+        ];
     }
 
     public function testSingularize()
     {
         $this->assertTrue($this->extractor->isWritable(AdderRemoverDummy::class, 'analyses'));
         $this->assertTrue($this->extractor->isWritable(AdderRemoverDummy::class, 'feet'));
-        $this->assertEquals(array('analyses', 'feet'), $this->extractor->getProperties(AdderRemoverDummy::class));
+        $this->assertEquals(['analyses', 'feet'], $this->extractor->getProperties(AdderRemoverDummy::class));
     }
 
     /**
@@ -284,13 +284,13 @@ class ReflectionExtractorTest extends TestCase
 
     public function getInitializableProperties(): array
     {
-        return array(
-            array(Php71Dummy::class, 'string', true),
-            array(Php71Dummy::class, 'intPrivate', true),
-            array(Php71Dummy::class, 'notExist', false),
-            array(Php71DummyExtended2::class, 'intWithAccessor', true),
-            array(Php71DummyExtended2::class, 'intPrivate', false),
-            array(NotInstantiable::class, 'foo', false),
-        );
+        return [
+            [Php71Dummy::class, 'string', true],
+            [Php71Dummy::class, 'intPrivate', true],
+            [Php71Dummy::class, 'notExist', false],
+            [Php71DummyExtended2::class, 'intWithAccessor', true],
+            [Php71DummyExtended2::class, 'intPrivate', false],
+            [NotInstantiable::class, 'foo', false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/SerializerExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/SerializerExtractorTest.php
index 91cdf80f8d..791398e3f2 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/SerializerExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/SerializerExtractorTest.php
@@ -36,8 +36,8 @@ class SerializerExtractorTest extends TestCase
     public function testGetProperties()
     {
         $this->assertEquals(
-            array('collection'),
-            $this->extractor->getProperties('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', array('serializer_groups' => array('a')))
+            ['collection'],
+            $this->extractor->getProperties('Symfony\Component\PropertyInfo\Tests\Fixtures\Dummy', ['serializer_groups' => ['a']])
         );
     }
 }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyExtractor.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyExtractor.php
index b09234b8a2..9003b2fa38 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/DummyExtractor.php
@@ -26,7 +26,7 @@ class DummyExtractor implements PropertyListExtractorInterface, PropertyDescript
     /**
      * {@inheritdoc}
      */
-    public function getShortDescription($class, $property, array $context = array())
+    public function getShortDescription($class, $property, array $context = [])
     {
         return 'short';
     }
@@ -34,7 +34,7 @@ class DummyExtractor implements PropertyListExtractorInterface, PropertyDescript
     /**
      * {@inheritdoc}
      */
-    public function getLongDescription($class, $property, array $context = array())
+    public function getLongDescription($class, $property, array $context = [])
     {
         return 'long';
     }
@@ -42,15 +42,15 @@ class DummyExtractor implements PropertyListExtractorInterface, PropertyDescript
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
-        return array(new Type(Type::BUILTIN_TYPE_INT));
+        return [new Type(Type::BUILTIN_TYPE_INT)];
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isReadable($class, $property, array $context = array())
+    public function isReadable($class, $property, array $context = [])
     {
         return true;
     }
@@ -58,7 +58,7 @@ class DummyExtractor implements PropertyListExtractorInterface, PropertyDescript
     /**
      * {@inheritdoc}
      */
-    public function isWritable($class, $property, array $context = array())
+    public function isWritable($class, $property, array $context = [])
     {
         return true;
     }
@@ -66,15 +66,15 @@ class DummyExtractor implements PropertyListExtractorInterface, PropertyDescript
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
-        return array('a', 'b');
+        return ['a', 'b'];
     }
 
     /**
      * {@inheritdoc}
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool
+    public function isInitializable(string $class, string $property, array $context = []): ?bool
     {
         return true;
     }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php
index 724f525309..6878db7cf3 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php
@@ -27,7 +27,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function getShortDescription($class, $property, array $context = array())
+    public function getShortDescription($class, $property, array $context = [])
     {
         $this->assertIsString($class);
         $this->assertIsString($property);
@@ -36,7 +36,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function getLongDescription($class, $property, array $context = array())
+    public function getLongDescription($class, $property, array $context = [])
     {
         $this->assertIsString($class);
         $this->assertIsString($property);
@@ -45,7 +45,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = array())
+    public function getTypes($class, $property, array $context = [])
     {
         $this->assertIsString($class);
         $this->assertIsString($property);
@@ -54,7 +54,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function isReadable($class, $property, array $context = array())
+    public function isReadable($class, $property, array $context = [])
     {
         $this->assertIsString($class);
         $this->assertIsString($property);
@@ -63,7 +63,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function isWritable($class, $property, array $context = array())
+    public function isWritable($class, $property, array $context = [])
     {
         $this->assertIsString($class);
         $this->assertIsString($property);
@@ -72,7 +72,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function getProperties($class, array $context = array())
+    public function getProperties($class, array $context = [])
     {
         $this->assertIsString($class);
     }
@@ -80,7 +80,7 @@ class NullExtractor implements PropertyListExtractorInterface, PropertyDescripti
     /**
      * {@inheritdoc}
      */
-    public function isInitializable(string $class, string $property, array $context = array()): ?bool
+    public function isInitializable(string $class, string $property, array $context = []): ?bool
     {
         return null;
     }
diff --git a/src/Symfony/Component/PropertyInfo/Type.php b/src/Symfony/Component/PropertyInfo/Type.php
index 1a33e29abd..b27ea6ed79 100644
--- a/src/Symfony/Component/PropertyInfo/Type.php
+++ b/src/Symfony/Component/PropertyInfo/Type.php
@@ -36,7 +36,7 @@ class Type
      *
      * @var string[]
      */
-    public static $builtinTypes = array(
+    public static $builtinTypes = [
         self::BUILTIN_TYPE_INT,
         self::BUILTIN_TYPE_FLOAT,
         self::BUILTIN_TYPE_STRING,
@@ -47,7 +47,7 @@ class Type
         self::BUILTIN_TYPE_CALLABLE,
         self::BUILTIN_TYPE_NULL,
         self::BUILTIN_TYPE_ITERABLE,
-    );
+    ];
 
     private $builtinType;
     private $nullable;
diff --git a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
index a73480cfdb..27b9c7cb9d 100644
--- a/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
+++ b/src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php
@@ -33,7 +33,7 @@ final class PhpDocTypeHelper
      */
     public function getTypes(DocType $varType): array
     {
-        $types = array();
+        $types = [];
         $nullable = false;
 
         if ($varType instanceof Nullable) {
@@ -54,7 +54,7 @@ final class PhpDocTypeHelper
             return $types;
         }
 
-        $varTypes = array();
+        $varTypes = [];
         for ($typeIndex = 0; $varType->has($typeIndex); ++$typeIndex) {
             $type = $varType->get($typeIndex);
 
@@ -152,9 +152,9 @@ final class PhpDocTypeHelper
     private function getPhpTypeAndClass(string $docType): array
     {
         if (\in_array($docType, Type::$builtinTypes)) {
-            return array($docType, null);
+            return [$docType, null];
         }
 
-        return array('object', substr($docType, 1));
+        return ['object', substr($docType, 1)];
     }
 }
diff --git a/src/Symfony/Component/Routing/Annotation/Route.php b/src/Symfony/Component/Routing/Annotation/Route.php
index 62ad8c8b86..f9e1ddcae0 100644
--- a/src/Symfony/Component/Routing/Annotation/Route.php
+++ b/src/Symfony/Component/Routing/Annotation/Route.php
@@ -22,14 +22,14 @@ namespace Symfony\Component\Routing\Annotation;
 class Route
 {
     private $path;
-    private $localizedPaths = array();
+    private $localizedPaths = [];
     private $name;
-    private $requirements = array();
-    private $options = array();
-    private $defaults = array();
+    private $requirements = [];
+    private $options = [];
+    private $defaults = [];
     private $host;
-    private $methods = array();
-    private $schemes = array();
+    private $methods = [];
+    private $schemes = [];
     private $condition;
 
     /**
@@ -134,7 +134,7 @@ class Route
 
     public function setSchemes($schemes)
     {
-        $this->schemes = \is_array($schemes) ? $schemes : array($schemes);
+        $this->schemes = \is_array($schemes) ? $schemes : [$schemes];
     }
 
     public function getSchemes()
@@ -144,7 +144,7 @@ class Route
 
     public function setMethods($methods)
     {
-        $this->methods = \is_array($methods) ? $methods : array($methods);
+        $this->methods = \is_array($methods) ? $methods : [$methods];
     }
 
     public function getMethods()
diff --git a/src/Symfony/Component/Routing/CHANGELOG.md b/src/Symfony/Component/Routing/CHANGELOG.md
index 8e359a3722..4d97d4060e 100644
--- a/src/Symfony/Component/Routing/CHANGELOG.md
+++ b/src/Symfony/Component/Routing/CHANGELOG.md
@@ -52,7 +52,7 @@ CHANGELOG
    Before:
 
    ```php
-   $router->generate('blog_show', array('slug' => 'my-blog-post'), true);
+   $router->generate('blog_show', ['slug' => 'my-blog-post'], true);
    ```
 
    After:
@@ -60,7 +60,7 @@ CHANGELOG
    ```php
    use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
-   $router->generate('blog_show', array('slug' => 'my-blog-post'), UrlGeneratorInterface::ABSOLUTE_URL);
+   $router->generate('blog_show', ['slug' => 'my-blog-post'], UrlGeneratorInterface::ABSOLUTE_URL);
    ```
 
 2.5.0
@@ -125,7 +125,7 @@ CHANGELOG
    ```php
    $route = new Route();
    $route->setPath('/article/{id}');
-   $route->setMethods(array('POST', 'PUT'));
+   $route->setMethods(['POST', 'PUT']);
    $route->setSchemes('https');
    ```
 
@@ -180,10 +180,10 @@ CHANGELOG
    used with a single parameter. The other params `$prefix`, `$default`, `$requirements` and `$options`
    will still work, but have been deprecated. The `addPrefix` method should be used for this
    use-case instead.
-   Before: `$parentCollection->addCollection($collection, '/prefix', array(...), array(...))`
+   Before: `$parentCollection->addCollection($collection, '/prefix', [...], [...])`
    After:
    ```php
-   $collection->addPrefix('/prefix', array(...), array(...));
+   $collection->addPrefix('/prefix', [...], [...]);
    $parentCollection->addCollection($collection);
    ```
  * added support for the method default argument values when defining a @Route
@@ -208,7 +208,7 @@ CHANGELOG
    (only relevant if you implemented your own RouteCompiler).
  * Added possibility to generate relative paths and network paths in the UrlGenerator, e.g.
    "../parent-file" and "//example.com/dir/file". The third parameter in
-   `UrlGeneratorInterface::generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH)`
+   `UrlGeneratorInterface::generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH)`
    now accepts more values and you should use the constants defined in `UrlGeneratorInterface` for
    claritiy. The old method calls with a Boolean parameter will continue to work because they
    equal the signature using the constants.
diff --git a/src/Symfony/Component/Routing/CompiledRoute.php b/src/Symfony/Component/Routing/CompiledRoute.php
index 44484c0e6e..8db812b075 100644
--- a/src/Symfony/Component/Routing/CompiledRoute.php
+++ b/src/Symfony/Component/Routing/CompiledRoute.php
@@ -37,7 +37,7 @@ class CompiledRoute implements \Serializable
      * @param array       $hostVariables An array of host variables
      * @param array       $variables     An array of variables (variables defined in the path and in the host patterns)
      */
-    public function __construct(string $staticPrefix, string $regex, array $tokens, array $pathVariables, string $hostRegex = null, array $hostTokens = array(), array $hostVariables = array(), array $variables = array())
+    public function __construct(string $staticPrefix, string $regex, array $tokens, array $pathVariables, string $hostRegex = null, array $hostTokens = [], array $hostVariables = [], array $variables = [])
     {
         $this->staticPrefix = $staticPrefix;
         $this->regex = $regex;
@@ -54,7 +54,7 @@ class CompiledRoute implements \Serializable
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             'vars' => $this->variables,
             'path_prefix' => $this->staticPrefix,
             'path_regex' => $this->regex,
@@ -63,7 +63,7 @@ class CompiledRoute implements \Serializable
             'host_regex' => $this->hostRegex,
             'host_tokens' => $this->hostTokens,
             'host_vars' => $this->hostVariables,
-        ));
+        ]);
     }
 
     /**
@@ -71,7 +71,7 @@ class CompiledRoute implements \Serializable
      */
     public function unserialize($serialized)
     {
-        $data = unserialize($serialized, array('allowed_classes' => false));
+        $data = unserialize($serialized, ['allowed_classes' => false]);
 
         $this->variables = $data['vars'];
         $this->staticPrefix = $data['path_prefix'];
diff --git a/src/Symfony/Component/Routing/DependencyInjection/RoutingResolverPass.php b/src/Symfony/Component/Routing/DependencyInjection/RoutingResolverPass.php
index ab0b7d8e07..7068825fef 100644
--- a/src/Symfony/Component/Routing/DependencyInjection/RoutingResolverPass.php
+++ b/src/Symfony/Component/Routing/DependencyInjection/RoutingResolverPass.php
@@ -43,7 +43,7 @@ class RoutingResolverPass implements CompilerPassInterface
         $definition = $container->getDefinition($this->resolverServiceId);
 
         foreach ($this->findAndSortTaggedServices($this->loaderTag, $container) as $id) {
-            $definition->addMethodCall('addLoader', array(new Reference($id)));
+            $definition->addMethodCall('addLoader', [new Reference($id)]);
         }
     }
 }
diff --git a/src/Symfony/Component/Routing/Exception/MethodNotAllowedException.php b/src/Symfony/Component/Routing/Exception/MethodNotAllowedException.php
index 22ca6c393c..e129ec8bf2 100644
--- a/src/Symfony/Component/Routing/Exception/MethodNotAllowedException.php
+++ b/src/Symfony/Component/Routing/Exception/MethodNotAllowedException.php
@@ -20,7 +20,7 @@ namespace Symfony\Component\Routing\Exception;
  */
 class MethodNotAllowedException extends \RuntimeException implements ExceptionInterface
 {
-    protected $allowedMethods = array();
+    protected $allowedMethods = [];
 
     public function __construct(array $allowedMethods, string $message = null, int $code = 0, \Exception $previous = null)
     {
diff --git a/src/Symfony/Component/Routing/Generator/Dumper/GeneratorDumperInterface.php b/src/Symfony/Component/Routing/Generator/Dumper/GeneratorDumperInterface.php
index fed3472392..096519aa1a 100644
--- a/src/Symfony/Component/Routing/Generator/Dumper/GeneratorDumperInterface.php
+++ b/src/Symfony/Component/Routing/Generator/Dumper/GeneratorDumperInterface.php
@@ -28,7 +28,7 @@ interface GeneratorDumperInterface
      *
      * @return string Executable code
      */
-    public function dump(array $options = array());
+    public function dump(array $options = []);
 
     /**
      * Gets the routes to dump.
diff --git a/src/Symfony/Component/Routing/Generator/Dumper/PhpGeneratorDumper.php b/src/Symfony/Component/Routing/Generator/Dumper/PhpGeneratorDumper.php
index 6f08a0f395..7af8f69fb7 100644
--- a/src/Symfony/Component/Routing/Generator/Dumper/PhpGeneratorDumper.php
+++ b/src/Symfony/Component/Routing/Generator/Dumper/PhpGeneratorDumper.php
@@ -33,12 +33,12 @@ class PhpGeneratorDumper extends GeneratorDumper
      *
      * @return string A PHP class representing the generator class
      */
-    public function dump(array $options = array())
+    public function dump(array $options = [])
     {
-        $options = array_merge(array(
+        $options = array_merge([
             'class' => 'ProjectUrlGenerator',
             'base_class' => 'Symfony\\Component\\Routing\\Generator\\UrlGenerator',
-        ), $options);
+        ], $options);
 
         return <<<EOF
 <?php
@@ -80,11 +80,11 @@ EOF;
      */
     private function generateDeclaredRoutes()
     {
-        $routes = "array(\n";
+        $routes = "[\n";
         foreach ($this->getRoutes()->all() as $name => $route) {
             $compiledRoute = $route->compile();
 
-            $properties = array();
+            $properties = [];
             $properties[] = $compiledRoute->getVariables();
             $properties[] = $route->getDefaults();
             $properties[] = $route->getRequirements();
@@ -94,7 +94,7 @@ EOF;
 
             $routes .= sprintf("        '%s' => %s,\n", $name, PhpMatcherDumper::export($properties));
         }
-        $routes .= '    )';
+        $routes .= '    ]';
 
         return $routes;
     }
@@ -107,7 +107,7 @@ EOF;
     private function generateGenerateMethod()
     {
         return <<<'EOF'
-    public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH)
+    public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH)
     {
         $locale = $parameters['_locale']
             ?? $this->context->getParameter('_locale')
diff --git a/src/Symfony/Component/Routing/Generator/UrlGeneratorInterface.php b/src/Symfony/Component/Routing/Generator/UrlGeneratorInterface.php
index d6e7938e5b..f7d37b2564 100644
--- a/src/Symfony/Component/Routing/Generator/UrlGeneratorInterface.php
+++ b/src/Symfony/Component/Routing/Generator/UrlGeneratorInterface.php
@@ -82,5 +82,5 @@ interface UrlGeneratorInterface extends RequestContextAwareInterface
      * @throws InvalidParameterException           When a parameter value for a placeholder is not correct because
      *                                             it does not match the requirement
      */
-    public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH);
+    public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH);
 }
diff --git a/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php b/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
index 1e5449ab22..0f5dcdb82a 100644
--- a/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
+++ b/src/Symfony/Component/Routing/Loader/AnnotationClassLoader.php
@@ -165,7 +165,7 @@ abstract class AnnotationClassLoader implements LoaderInterface
 
         $path = $annot->getLocalizedPaths() ?: $annot->getPath();
         $prefix = $globals['localized_paths'] ?: $globals['path'];
-        $paths = array();
+        $paths = [];
 
         if (\is_array($path)) {
             if (!\is_array($prefix)) {
@@ -312,18 +312,18 @@ abstract class AnnotationClassLoader implements LoaderInterface
 
     private function resetGlobals()
     {
-        return array(
+        return [
             'path' => null,
-            'localized_paths' => array(),
-            'requirements' => array(),
-            'options' => array(),
-            'defaults' => array(),
-            'schemes' => array(),
-            'methods' => array(),
+            'localized_paths' => [],
+            'requirements' => [],
+            'options' => [],
+            'defaults' => [],
+            'schemes' => [],
+            'methods' => [],
             'host' => '',
             'condition' => '',
             'name' => '',
-        );
+        ];
     }
 
     protected function createRoute($path, $defaults, $requirements, $options, $host, $schemes, $methods, $condition)
diff --git a/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php b/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
index b69fa99c4a..d0f0ce4441 100644
--- a/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/AnnotationFileLoader.php
@@ -104,7 +104,7 @@ class AnnotationFileLoader extends FileLoader
 
             if (true === $namespace && T_STRING === $token[0]) {
                 $namespace = $token[1];
-                while (isset($tokens[++$i][1]) && \in_array($tokens[$i][0], array(T_NS_SEPARATOR, T_STRING))) {
+                while (isset($tokens[++$i][1]) && \in_array($tokens[$i][0], [T_NS_SEPARATOR, T_STRING])) {
                     $namespace .= $tokens[$i][1];
                 }
                 $token = $tokens[$i];
@@ -121,7 +121,7 @@ class AnnotationFileLoader extends FileLoader
                     if (T_DOUBLE_COLON === $tokens[$j][0] || T_NEW === $tokens[$j][0]) {
                         $skipClassToken = true;
                         break;
-                    } elseif (!\in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) {
+                    } elseif (!\in_array($tokens[$j][0], [T_WHITESPACE, T_DOC_COMMENT, T_COMMENT])) {
                         break;
                     }
                 }
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/Traits/AddTrait.php b/src/Symfony/Component/Routing/Loader/Configurator/Traits/AddTrait.php
index 57dd71f2c1..45642d2fec 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/Traits/AddTrait.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/Traits/AddTrait.php
@@ -34,7 +34,7 @@ trait AddTrait
      */
     final public function add(string $name, $path): RouteConfigurator
     {
-        $paths = array();
+        $paths = [];
         $parentConfigurator = $this instanceof CollectionConfigurator ? $this : ($this instanceof RouteConfigurator ? $this->parentConfigurator : null);
 
         if (\is_array($path)) {
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/Traits/RouteTrait.php b/src/Symfony/Component/Routing/Loader/Configurator/Traits/RouteTrait.php
index 3613f25222..4fe5a0d60e 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/Traits/RouteTrait.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/Traits/RouteTrait.php
@@ -120,7 +120,7 @@ trait RouteTrait
      */
     final public function controller($controller)
     {
-        $this->route->addDefaults(array('_controller' => $controller));
+        $this->route->addDefaults(['_controller' => $controller]);
 
         return $this;
     }
diff --git a/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php b/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
index b31eed5a6c..8370d576c5 100644
--- a/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
+++ b/src/Symfony/Component/Routing/Loader/ObjectRouteLoader.php
@@ -63,7 +63,7 @@ abstract class ObjectRouteLoader extends Loader
             throw new \LogicException(sprintf('%s:getServiceObject() must return an object: %s returned', \get_class($this), \gettype($loaderObject)));
         }
 
-        if (!\is_callable(array($loaderObject, $method))) {
+        if (!\is_callable([$loaderObject, $method])) {
             throw new \BadMethodCallException(sprintf('Method "%s" not found on "%s" when importing routing resource "%s"', $method, \get_class($loaderObject), $resource));
         }
 
diff --git a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
index 54b0c65c0c..241e47f033 100644
--- a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
@@ -171,7 +171,7 @@ class XmlFileLoader extends FileLoader
         $imported = $this->import($resource, ('' !== $type ? $type : null), false, $file);
 
         if (!\is_array($imported)) {
-            $imported = array($imported);
+            $imported = [$imported];
         }
 
         foreach ($imported as $subCollection) {
@@ -261,12 +261,12 @@ class XmlFileLoader extends FileLoader
      */
     private function parseConfigs(\DOMElement $node, $path)
     {
-        $defaults = array();
-        $requirements = array();
-        $options = array();
+        $defaults = [];
+        $requirements = [];
+        $options = [];
         $condition = null;
-        $prefixes = array();
-        $paths = array();
+        $prefixes = [];
+        $paths = [];
 
         foreach ($node->getElementsByTagNameNS(self::NAMESPACE_URI, '*') as $n) {
             if ($node !== $n->parentNode) {
@@ -312,7 +312,7 @@ class XmlFileLoader extends FileLoader
             $defaults['_controller'] = $controller;
         }
 
-        return array($defaults, $requirements, $options, $condition, $paths, $prefixes);
+        return [$defaults, $requirements, $options, $condition, $paths, $prefixes];
     }
 
     /**
@@ -376,7 +376,7 @@ class XmlFileLoader extends FileLoader
             case 'string':
                 return trim($node->nodeValue);
             case 'list':
-                $list = array();
+                $list = [];
 
                 foreach ($node->childNodes as $element) {
                     if (!$element instanceof \DOMElement) {
@@ -392,7 +392,7 @@ class XmlFileLoader extends FileLoader
 
                 return $list;
             case 'map':
-                $map = array();
+                $map = [];
 
                 foreach ($node->childNodes as $element) {
                     if (!$element instanceof \DOMElement) {
diff --git a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
index ca2e313aa4..dad46b3243 100644
--- a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
@@ -27,9 +27,9 @@ use Symfony\Component\Yaml\Yaml;
  */
 class YamlFileLoader extends FileLoader
 {
-    private static $availableKeys = array(
+    private static $availableKeys = [
         'resource', 'type', 'prefix', 'path', 'host', 'schemes', 'methods', 'defaults', 'requirements', 'options', 'condition', 'controller', 'name_prefix', 'trailing_slash_on_root',
-    );
+    ];
     private $yamlParser;
 
     /**
@@ -95,7 +95,7 @@ class YamlFileLoader extends FileLoader
      */
     public function supports($resource, $type = null)
     {
-        return \is_string($resource) && \in_array(pathinfo($resource, PATHINFO_EXTENSION), array('yml', 'yaml'), true) && (!$type || 'yaml' === $type);
+        return \is_string($resource) && \in_array(pathinfo($resource, PATHINFO_EXTENSION), ['yml', 'yaml'], true) && (!$type || 'yaml' === $type);
     }
 
     /**
@@ -108,12 +108,12 @@ class YamlFileLoader extends FileLoader
      */
     protected function parseRoute(RouteCollection $collection, $name, array $config, $path)
     {
-        $defaults = isset($config['defaults']) ? $config['defaults'] : array();
-        $requirements = isset($config['requirements']) ? $config['requirements'] : array();
-        $options = isset($config['options']) ? $config['options'] : array();
+        $defaults = isset($config['defaults']) ? $config['defaults'] : [];
+        $requirements = isset($config['requirements']) ? $config['requirements'] : [];
+        $options = isset($config['options']) ? $config['options'] : [];
         $host = isset($config['host']) ? $config['host'] : '';
-        $schemes = isset($config['schemes']) ? $config['schemes'] : array();
-        $methods = isset($config['methods']) ? $config['methods'] : array();
+        $schemes = isset($config['schemes']) ? $config['schemes'] : [];
+        $methods = isset($config['methods']) ? $config['methods'] : [];
         $condition = isset($config['condition']) ? $config['condition'] : null;
 
         foreach ($requirements as $placeholder => $requirement) {
@@ -154,9 +154,9 @@ class YamlFileLoader extends FileLoader
     {
         $type = isset($config['type']) ? $config['type'] : null;
         $prefix = isset($config['prefix']) ? $config['prefix'] : '';
-        $defaults = isset($config['defaults']) ? $config['defaults'] : array();
-        $requirements = isset($config['requirements']) ? $config['requirements'] : array();
-        $options = isset($config['options']) ? $config['options'] : array();
+        $defaults = isset($config['defaults']) ? $config['defaults'] : [];
+        $requirements = isset($config['requirements']) ? $config['requirements'] : [];
+        $options = isset($config['options']) ? $config['options'] : [];
         $host = isset($config['host']) ? $config['host'] : null;
         $condition = isset($config['condition']) ? $config['condition'] : null;
         $schemes = isset($config['schemes']) ? $config['schemes'] : null;
@@ -172,7 +172,7 @@ class YamlFileLoader extends FileLoader
         $imported = $this->import($config['resource'], $type, false, $file);
 
         if (!\is_array($imported)) {
-            $imported = array($imported);
+            $imported = [$imported];
         }
 
         foreach ($imported as $subCollection) {
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/MatcherDumperInterface.php b/src/Symfony/Component/Routing/Matcher/Dumper/MatcherDumperInterface.php
index 5e7c134b9f..2a25293aa3 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/MatcherDumperInterface.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/MatcherDumperInterface.php
@@ -28,7 +28,7 @@ interface MatcherDumperInterface
      *
      * @return string Executable code
      */
-    public function dump(array $options = array());
+    public function dump(array $options = []);
 
     /**
      * Gets the routes to dump.
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
index bbf57cfca1..61b2ed320a 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherDumper.php
@@ -32,7 +32,7 @@ class PhpMatcherDumper extends MatcherDumper
     /**
      * @var ExpressionFunctionProviderInterface[]
      */
-    private $expressionLanguageProviders = array();
+    private $expressionLanguageProviders = [];
 
     /**
      * Dumps a set of routes to a PHP class.
@@ -46,12 +46,12 @@ class PhpMatcherDumper extends MatcherDumper
      *
      * @return string A PHP class representing the matcher class
      */
-    public function dump(array $options = array())
+    public function dump(array $options = [])
     {
-        $options = array_replace(array(
+        $options = array_replace([
             'class' => 'ProjectUrlMatcher',
             'base_class' => 'Symfony\\Component\\Routing\\Matcher\\UrlMatcher',
-        ), $options);
+        ], $options);
 
         // trailing slash support is only enabled if we know how to redirect the user
         $interfaces = class_implements($options['base_class']);
@@ -98,7 +98,7 @@ EOF;
                 $host = '/'.strtr(strrev($host), '}.{', '(/)');
             }
 
-            $routes->addRoute($host ?: '/(.*)', array($name, $route));
+            $routes->addRoute($host ?: '/(.*)', [$name, $route]);
         }
 
         if ($matchHost) {
@@ -111,7 +111,7 @@ EOF;
 
         list($staticRoutes, $dynamicRoutes) = $this->groupStaticRoutes($routes);
 
-        $conditions = array(null);
+        $conditions = [null];
         $code .= $this->compileStaticRoutes($staticRoutes, $conditions);
         $chunkLimit = \count($dynamicRoutes);
 
@@ -154,7 +154,7 @@ EOF;
      */
     private function groupStaticRoutes(RouteCollection $collection): array
     {
-        $staticRoutes = $dynamicRegex = array();
+        $staticRoutes = $dynamicRegex = [];
         $dynamicRoutes = new RouteCollection();
 
         foreach ($collection->all() as $name => $route) {
@@ -175,20 +175,20 @@ EOF;
                 }
                 foreach ($dynamicRegex as list($hostRx, $rx)) {
                     if (preg_match($rx, $url) && (!$host || !$hostRx || preg_match($hostRx, $host))) {
-                        $dynamicRegex[] = array($hostRegex, $regex);
+                        $dynamicRegex[] = [$hostRegex, $regex];
                         $dynamicRoutes->add($name, $route);
                         continue 2;
                     }
                 }
 
-                $staticRoutes[$url][$name] = array($route, $hasTrailingSlash);
+                $staticRoutes[$url][$name] = [$route, $hasTrailingSlash];
             } else {
-                $dynamicRegex[] = array($hostRegex, $regex);
+                $dynamicRegex[] = [$hostRegex, $regex];
                 $dynamicRoutes->add($name, $route);
             }
         }
 
-        return array($staticRoutes, $dynamicRoutes);
+        return [$staticRoutes, $dynamicRoutes];
     }
 
     /**
@@ -207,15 +207,15 @@ EOF;
         $code = '';
 
         foreach ($staticRoutes as $url => $routes) {
-            $code .= self::export($url)." => array(\n";
+            $code .= self::export($url)." => [\n";
             foreach ($routes as $name => list($route, $hasTrailingSlash)) {
                 $code .= $this->compileRoute($route, $name, !$route->compile()->getHostVariables() ? $route->getHost() : $route->compile()->getHostRegex() ?: null, $hasTrailingSlash, false, $conditions);
             }
-            $code .= "),\n";
+            $code .= "],\n";
         }
 
         if ($code) {
-            return "\$this->staticRoutes = array(\n{$this->indent($code, 1)});\n";
+            return "\$this->staticRoutes = [\n{$this->indent($code, 1)}];\n";
         }
 
         return $code;
@@ -245,14 +245,14 @@ EOF;
             return '';
         }
         $code = '';
-        $state = (object) array(
+        $state = (object) [
             'regex' => '',
             'routes' => '',
             'mark' => 0,
             'markTail' => 0,
-            'hostVars' => array(),
-            'vars' => array(),
-        );
+            'hostVars' => [],
+            'vars' => [],
+        ];
         $state->getVars = static function ($m) use ($state) {
             if ('_route' === $m[1]) {
                 return '?:';
@@ -265,13 +265,13 @@ EOF;
 
         $chunkSize = 0;
         $prev = null;
-        $perModifiers = array();
+        $perModifiers = [];
         foreach ($collection->all() as $name => $route) {
             preg_match('#[a-zA-Z]*$#', $route->compile()->getRegex(), $rx);
             if ($chunkLimit < ++$chunkSize || $prev !== $rx[0] && $route->compile()->getPathVariables()) {
                 $chunkSize = 1;
                 $routes = new RouteCollection();
-                $perModifiers[] = array($rx[0], $routes);
+                $perModifiers[] = [$rx[0], $routes];
                 $prev = $rx[0];
             }
             $routes->add($name, $route);
@@ -279,12 +279,12 @@ EOF;
 
         foreach ($perModifiers as list($modifiers, $routes)) {
             $prev = false;
-            $perHost = array();
+            $perHost = [];
             foreach ($routes->all() as $name => $route) {
                 $regex = $route->compile()->getHostRegex();
                 if ($prev !== $regex) {
                     $routes = new RouteCollection();
-                    $perHost[] = array($regex, $routes);
+                    $perHost[] = [$regex, $routes];
                     $prev = $regex;
                 }
                 $routes->add($name, $route);
@@ -299,12 +299,12 @@ EOF;
                 if ($matchHost) {
                     if ($hostRegex) {
                         preg_match('#^.\^(.*)\$.[a-zA-Z]*$#', $hostRegex, $rx);
-                        $state->vars = array();
+                        $state->vars = [];
                         $hostRegex = '(?i:'.preg_replace_callback('#\?P<([^>]++)>#', $state->getVars, $rx[1]).')\.';
                         $state->hostVars = $state->vars;
                     } else {
                         $hostRegex = '(?:(?:[^./]*+\.)++)';
-                        $state->hostVars = array();
+                        $state->hostVars = [];
                     }
                     $state->mark += \strlen($rx = ($prev ? ')' : '')."|{$hostRegex}(?");
                     $code .= "\n        .".self::export($rx);
@@ -316,14 +316,14 @@ EOF;
                 foreach ($routes->all() as $name => $route) {
                     preg_match('#^.\^(.*)\$.[a-zA-Z]*$#', $route->compile()->getRegex(), $rx);
 
-                    $state->vars = array();
+                    $state->vars = [];
                     $regex = preg_replace_callback('#\?P<([^>]++)>#', $state->getVars, $rx[1]);
                     if ($hasTrailingSlash = '/' !== $regex && '/' === $regex[-1]) {
                         $regex = substr($regex, 0, -1);
                     }
                     $hasTrailingVar = (bool) preg_match('#\{\w+\}/?$#', $route->getPath());
 
-                    $tree->addRoute($regex, array($name, $regex, $state->vars, $route, $hasTrailingSlash, $hasTrailingVar));
+                    $tree->addRoute($regex, [$name, $regex, $state->vars, $route, $hasTrailingSlash, $hasTrailingVar]);
                 }
 
                 $code .= $this->compileStaticPrefixCollection($tree, $state, 0, $conditions);
@@ -348,8 +348,8 @@ EOF;
 
         unset($state->getVars);
 
-        return "\$this->regexpList = array({$code}\n);\n"
-            ."\$this->dynamicRoutes = array(\n{$this->indent($state->routes, 1)});\n";
+        return "\$this->regexpList = [{$code}\n];\n"
+            ."\$this->dynamicRoutes = [\n{$this->indent($state->routes, 1)}];\n";
     }
 
     /**
@@ -394,7 +394,7 @@ EOF;
             $state->regex .= $rx;
 
             $prevRegex = $compiledRoute->getRegex();
-            $state->routes .= sprintf("%s => array(\n%s),\n", $state->mark, $this->compileRoute($route, $name, $vars, $hasTrailingSlash, $hasTrailingVar, $conditions));
+            $state->routes .= sprintf("%s => [\n%s],\n", $state->mark, $this->compileRoute($route, $name, $vars, $hasTrailingSlash, $hasTrailingVar, $conditions));
         }
 
         return $code;
@@ -413,15 +413,15 @@ EOF;
         }
 
         if ($condition = $route->getCondition()) {
-            $condition = $this->getExpressionLanguage()->compile($condition, array('context', 'request'));
+            $condition = $this->getExpressionLanguage()->compile($condition, ['context', 'request']);
             $condition = $conditions[$condition] ?? $conditions[$condition] = (false !== strpos($condition, '$request') ? 1 : -1) * \count($conditions);
         } else {
             $condition = 'null';
         }
 
         return sprintf(
-            "    array(%s, %s, %s, %s, %s, %s, %s),\n",
-            self::export(array('_route' => $name) + $defaults),
+            "    [%s, %s, %s, %s, %s, %s, %s],\n",
+            self::export(['_route' => $name] + $defaults),
             self::export($vars),
             self::export(array_flip($route->getMethods()) ?: null),
             self::export(array_flip($route->getSchemes()) ?: null),
@@ -445,7 +445,7 @@ EOF;
 
     private function indent($code, $level = 1)
     {
-        $code = preg_replace('/ => array\(\n    (array\(.+),\n\),/', ' => array($1),', $code);
+        $code = preg_replace('/ => \[\n    (\[.+),\n\],/', ' => [$1],', $code);
 
         return preg_replace('/^./m', str_repeat('    ', $level).'$0', $code);
     }
@@ -466,11 +466,11 @@ EOF;
             return str_replace("\n", '\'."\n".\'', var_export($value, true));
         }
         if (!$value) {
-            return 'array()';
+            return '[]';
         }
 
         $i = 0;
-        $export = 'array(';
+        $export = '[';
 
         foreach ($value as $k => $v) {
             if ($i === $k) {
@@ -486,6 +486,6 @@ EOF;
             $export .= self::export($v).', ';
         }
 
-        return substr_replace($export, ')', -2);
+        return substr_replace($export, ']', -2);
     }
 }
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherTrait.php b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherTrait.php
index 40d6badf3b..7e370b9d20 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherTrait.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/PhpMatcherTrait.php
@@ -24,14 +24,14 @@ use Symfony\Component\Routing\Matcher\RedirectableUrlMatcherInterface;
 trait PhpMatcherTrait
 {
     private $matchHost = false;
-    private $staticRoutes = array();
-    private $regexpList = array();
-    private $dynamicRoutes = array();
+    private $staticRoutes = [];
+    private $regexpList = [];
+    private $dynamicRoutes = [];
     private $checkCondition;
 
     public function match($pathinfo)
     {
-        $allow = $allowSchemes = array();
+        $allow = $allowSchemes = [];
         if ($ret = $this->doMatch($pathinfo, $allow, $allowSchemes)) {
             return $ret;
         }
@@ -41,7 +41,7 @@ trait PhpMatcherTrait
         if (!$this instanceof RedirectableUrlMatcherInterface) {
             throw new ResourceNotFoundException();
         }
-        if (!\in_array($this->context->getMethod(), array('HEAD', 'GET'), true)) {
+        if (!\in_array($this->context->getMethod(), ['HEAD', 'GET'], true)) {
             // no-op
         } elseif ($allowSchemes) {
             redirect_scheme:
@@ -67,9 +67,9 @@ trait PhpMatcherTrait
         throw new ResourceNotFoundException();
     }
 
-    private function doMatch(string $pathinfo, array &$allow = array(), array &$allowSchemes = array()): array
+    private function doMatch(string $pathinfo, array &$allow = [], array &$allowSchemes = []): array
     {
-        $allow = $allowSchemes = array();
+        $allow = $allowSchemes = [];
         $pathinfo = rawurldecode($pathinfo) ?: '/';
         $trimmedPathinfo = rtrim($pathinfo, '/') ?: '/';
         $context = $this->context;
@@ -84,14 +84,14 @@ trait PhpMatcherTrait
         }
         $supportsRedirections = 'GET' === $canonicalMethod && $this instanceof RedirectableUrlMatcherInterface;
 
-        foreach ($this->staticRoutes[$trimmedPathinfo] ?? array() as list($ret, $requiredHost, $requiredMethods, $requiredSchemes, $hasTrailingSlash, , $condition)) {
+        foreach ($this->staticRoutes[$trimmedPathinfo] ?? [] as list($ret, $requiredHost, $requiredMethods, $requiredSchemes, $hasTrailingSlash, , $condition)) {
             if ($condition && !($this->checkCondition)($condition, $context, 0 < $condition ? $request ?? $request = $this->request ?: $this->createRequest($pathinfo) : null)) {
                 continue;
             }
 
             if ('/' !== $pathinfo && $hasTrailingSlash === ($trimmedPathinfo === $pathinfo)) {
                 if ($supportsRedirections && (!$requiredMethods || isset($requiredMethods['GET']))) {
-                    return $allow = $allowSchemes = array();
+                    return $allow = $allowSchemes = [];
                 }
                 continue;
             }
@@ -140,7 +140,7 @@ trait PhpMatcherTrait
 
                     if ('/' !== $pathinfo && $hasTrailingSlash === ($trimmedPathinfo === $pathinfo)) {
                         if ($supportsRedirections && (!$requiredMethods || isset($requiredMethods['GET']))) {
-                            return $allow = $allowSchemes = array();
+                            return $allow = $allowSchemes = [];
                         }
                         if ($trimmedPathinfo === $pathinfo || !$hasTrailingVar) {
                             continue;
@@ -177,6 +177,6 @@ trait PhpMatcherTrait
             throw new NoConfigurationException();
         }
 
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php b/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
index 4eea8593e1..50f974f2e8 100644
--- a/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
+++ b/src/Symfony/Component/Routing/Matcher/Dumper/StaticPrefixCollection.php
@@ -28,17 +28,17 @@ class StaticPrefixCollection
     /**
      * @var string[]
      */
-    private $staticPrefixes = array();
+    private $staticPrefixes = [];
 
     /**
      * @var string[]
      */
-    private $prefixes = array();
+    private $prefixes = [];
 
     /**
      * @var array[]|self[]
      */
-    private $items = array();
+    private $items = [];
 
     public function __construct(string $prefix = '/')
     {
@@ -106,7 +106,7 @@ class StaticPrefixCollection
                 $child = new self($commonPrefix);
                 list($child->prefixes[0], $child->staticPrefixes[0]) = $child->getCommonPrefix($this->prefixes[$i], $this->prefixes[$i]);
                 list($child->prefixes[1], $child->staticPrefixes[1]) = $child->getCommonPrefix($prefix, $prefix);
-                $child->items = array($this->items[$i], $route);
+                $child->items = [$this->items[$i], $route];
 
                 $this->staticPrefixes[$i] = $commonStaticPrefix;
                 $this->prefixes[$i] = $commonPrefix;
@@ -149,7 +149,7 @@ class StaticPrefixCollection
         $baseLength = \strlen($this->prefix);
         $end = min(\strlen($prefix), \strlen($anotherPrefix));
         $staticLength = null;
-        set_error_handler(array(__CLASS__, 'handleError'));
+        set_error_handler([__CLASS__, 'handleError']);
 
         for ($i = $baseLength; $i < $end && $prefix[$i] === $anotherPrefix[$i]; ++$i) {
             if ('(' === $prefix[$i]) {
@@ -192,7 +192,7 @@ class StaticPrefixCollection
             } while (0b10 === (\ord($prefix[$i]) >> 6));
         }
 
-        return array(substr($prefix, 0, $i), substr($prefix, 0, $staticLength ?? $i));
+        return [substr($prefix, 0, $i), substr($prefix, 0, $staticLength ?? $i)];
     }
 
     public static function handleError($type, $msg)
diff --git a/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php b/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
index bfdb59b378..eb7bec7f34 100644
--- a/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/RedirectableUrlMatcher.php
@@ -27,7 +27,7 @@ abstract class RedirectableUrlMatcher extends UrlMatcher implements Redirectable
         try {
             return parent::match($pathinfo);
         } catch (ResourceNotFoundException $e) {
-            if (!\in_array($this->context->getMethod(), array('HEAD', 'GET'), true)) {
+            if (!\in_array($this->context->getMethod(), ['HEAD', 'GET'], true)) {
                 throw $e;
             }
 
diff --git a/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php b/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
index 61cad8e692..3c3c4bfcf9 100644
--- a/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/TraceableUrlMatcher.php
@@ -31,7 +31,7 @@ class TraceableUrlMatcher extends UrlMatcher
 
     public function getTraces($pathinfo)
     {
-        $this->traces = array();
+        $this->traces = [];
 
         try {
             $this->match($pathinfo);
@@ -57,7 +57,7 @@ class TraceableUrlMatcher extends UrlMatcher
 
             if (!preg_match($compiledRoute->getRegex(), $pathinfo, $matches)) {
                 // does it match without any requirements?
-                $r = new Route($route->getPath(), $route->getDefaults(), array(), $route->getOptions());
+                $r = new Route($route->getPath(), $route->getDefaults(), [], $route->getOptions());
                 $cr = $r->compile();
                 if (!preg_match($cr->getRegex(), $pathinfo)) {
                     $this->addTrace(sprintf('Path "%s" does not match', $route->getPath()), self::ROUTE_DOES_NOT_MATCH, $name, $route);
@@ -66,7 +66,7 @@ class TraceableUrlMatcher extends UrlMatcher
                 }
 
                 foreach ($route->getRequirements() as $n => $regex) {
-                    $r = new Route($route->getPath(), $route->getDefaults(), array($n => $regex), $route->getOptions());
+                    $r = new Route($route->getPath(), $route->getDefaults(), [$n => $regex], $route->getOptions());
                     $cr = $r->compile();
 
                     if (\in_array($n, $cr->getVariables()) && !preg_match($cr->getRegex(), $pathinfo)) {
@@ -80,7 +80,7 @@ class TraceableUrlMatcher extends UrlMatcher
             }
 
             // check host requirement
-            $hostMatches = array();
+            $hostMatches = [];
             if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
                 $this->addTrace(sprintf('Host "%s" does not match the requirement ("%s")', $this->context->getHost(), $route->getHost()), self::ROUTE_ALMOST_MATCHES, $name, $route);
 
@@ -105,7 +105,7 @@ class TraceableUrlMatcher extends UrlMatcher
 
             // check condition
             if ($condition = $route->getCondition()) {
-                if (!$this->getExpressionLanguage()->evaluate($condition, array('context' => $this->context, 'request' => $this->request ?: $this->createRequest($pathinfo)))) {
+                if (!$this->getExpressionLanguage()->evaluate($condition, ['context' => $this->context, 'request' => $this->request ?: $this->createRequest($pathinfo)])) {
                     $this->addTrace(sprintf('Condition "%s" does not evaluate to "true"', $condition), self::ROUTE_ALMOST_MATCHES, $name, $route);
 
                     continue;
@@ -131,11 +131,11 @@ class TraceableUrlMatcher extends UrlMatcher
 
     private function addTrace($log, $level = self::ROUTE_DOES_NOT_MATCH, $name = null, $route = null)
     {
-        $this->traces[] = array(
+        $this->traces[] = [
             'log' => $log,
             'name' => $name,
             'level' => $level,
             'path' => null !== $route ? $route->getPath() : null,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
index 4411811e16..6fb750340c 100644
--- a/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
+++ b/src/Symfony/Component/Routing/Matcher/UrlMatcher.php
@@ -37,14 +37,14 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
     /**
      * Collects HTTP methods that would be allowed for the request.
      */
-    protected $allow = array();
+    protected $allow = [];
 
     /**
      * Collects URI schemes that would be allowed for the request.
      *
      * @internal
      */
-    protected $allowSchemes = array();
+    protected $allowSchemes = [];
 
     protected $routes;
     protected $request;
@@ -53,7 +53,7 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
     /**
      * @var ExpressionFunctionProviderInterface[]
      */
-    protected $expressionLanguageProviders = array();
+    protected $expressionLanguageProviders = [];
 
     public function __construct(RouteCollection $routes, RequestContext $context)
     {
@@ -82,7 +82,7 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
      */
     public function match($pathinfo)
     {
-        $this->allow = $this->allowSchemes = array();
+        $this->allow = $this->allowSchemes = [];
 
         if ($ret = $this->matchCollection(rawurldecode($pathinfo) ?: '/', $this->routes)) {
             return $ret;
@@ -166,14 +166,14 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
 
             if ('/' !== $pathinfo && $hasTrailingSlash === ($trimmedPathinfo === $pathinfo)) {
                 if ($supportsTrailingSlash && (!$requiredMethods || \in_array('GET', $requiredMethods))) {
-                    return $this->allow = $this->allowSchemes = array();
+                    return $this->allow = $this->allowSchemes = [];
                 }
                 if ($trimmedPathinfo === $pathinfo || !$hasTrailingVar) {
                     continue;
                 }
             }
 
-            $hostMatches = array();
+            $hostMatches = [];
             if ($compiledRoute->getHostRegex() && !preg_match($compiledRoute->getHostRegex(), $this->context->getHost(), $hostMatches)) {
                 continue;
             }
@@ -201,10 +201,10 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
                 continue;
             }
 
-            return $this->getAttributes($route, $name, array_replace($matches, $hostMatches, isset($status[1]) ? $status[1] : array()));
+            return $this->getAttributes($route, $name, array_replace($matches, $hostMatches, isset($status[1]) ? $status[1] : []));
         }
 
-        return array();
+        return [];
     }
 
     /**
@@ -244,11 +244,11 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
     protected function handleRouteRequirements($pathinfo, $name, Route $route)
     {
         // expression condition
-        if ($route->getCondition() && !$this->getExpressionLanguage()->evaluate($route->getCondition(), array('context' => $this->context, 'request' => $this->request ?: $this->createRequest($pathinfo)))) {
-            return array(self::REQUIREMENT_MISMATCH, null);
+        if ($route->getCondition() && !$this->getExpressionLanguage()->evaluate($route->getCondition(), ['context' => $this->context, 'request' => $this->request ?: $this->createRequest($pathinfo)])) {
+            return [self::REQUIREMENT_MISMATCH, null];
         }
 
-        return array(self::REQUIREMENT_MATCH, null);
+        return [self::REQUIREMENT_MATCH, null];
     }
 
     /**
@@ -291,9 +291,9 @@ class UrlMatcher implements UrlMatcherInterface, RequestMatcherInterface
             return null;
         }
 
-        return Request::create($this->context->getScheme().'://'.$this->context->getHost().$this->context->getBaseUrl().$pathinfo, $this->context->getMethod(), $this->context->getParameters(), array(), array(), array(
+        return Request::create($this->context->getScheme().'://'.$this->context->getHost().$this->context->getBaseUrl().$pathinfo, $this->context->getMethod(), $this->context->getParameters(), [], [], [
             'SCRIPT_FILENAME' => $this->context->getBaseUrl(),
             'SCRIPT_NAME' => $this->context->getBaseUrl(),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Routing/RequestContext.php b/src/Symfony/Component/Routing/RequestContext.php
index 0a68fe08f6..dc3e4be1e7 100644
--- a/src/Symfony/Component/Routing/RequestContext.php
+++ b/src/Symfony/Component/Routing/RequestContext.php
@@ -31,7 +31,7 @@ class RequestContext
     private $httpPort;
     private $httpsPort;
     private $queryString;
-    private $parameters = array();
+    private $parameters = [];
 
     public function __construct(string $baseUrl = '', string $method = 'GET', string $host = 'localhost', string $scheme = 'http', int $httpPort = 80, int $httpsPort = 443, string $path = '/', string $queryString = '')
     {
diff --git a/src/Symfony/Component/Routing/Route.php b/src/Symfony/Component/Routing/Route.php
index 46724dbd56..58675902a1 100644
--- a/src/Symfony/Component/Routing/Route.php
+++ b/src/Symfony/Component/Routing/Route.php
@@ -21,11 +21,11 @@ class Route implements \Serializable
 {
     private $path = '/';
     private $host = '';
-    private $schemes = array();
-    private $methods = array();
-    private $defaults = array();
-    private $requirements = array();
-    private $options = array();
+    private $schemes = [];
+    private $methods = [];
+    private $defaults = [];
+    private $requirements = [];
+    private $options = [];
     private $condition = '';
 
     /**
@@ -50,7 +50,7 @@ class Route implements \Serializable
      * @param string|string[] $methods      A required HTTP method or an array of restricted methods
      * @param string          $condition    A condition that should evaluate to true for the route to match
      */
-    public function __construct(string $path, array $defaults = array(), array $requirements = array(), array $options = array(), ?string $host = '', $schemes = array(), $methods = array(), ?string $condition = '')
+    public function __construct(string $path, array $defaults = [], array $requirements = [], array $options = [], ?string $host = '', $schemes = [], $methods = [], ?string $condition = '')
     {
         $this->setPath($path);
         $this->addDefaults($defaults);
@@ -67,7 +67,7 @@ class Route implements \Serializable
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             'path' => $this->path,
             'host' => $this->host,
             'defaults' => $this->defaults,
@@ -77,7 +77,7 @@ class Route implements \Serializable
             'methods' => $this->methods,
             'condition' => $this->condition,
             'compiled' => $this->compiled,
-        ));
+        ]);
     }
 
     /**
@@ -262,9 +262,9 @@ class Route implements \Serializable
      */
     public function setOptions(array $options)
     {
-        $this->options = array(
+        $this->options = [
             'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler',
-        );
+        ];
 
         return $this->addOptions($options);
     }
@@ -351,7 +351,7 @@ class Route implements \Serializable
      */
     public function setDefaults(array $defaults)
     {
-        $this->defaults = array();
+        $this->defaults = [];
 
         return $this->addDefaults($defaults);
     }
@@ -436,7 +436,7 @@ class Route implements \Serializable
      */
     public function setRequirements(array $requirements)
     {
-        $this->requirements = array();
+        $this->requirements = [];
 
         return $this->addRequirements($requirements);
     }
diff --git a/src/Symfony/Component/Routing/RouteCollection.php b/src/Symfony/Component/Routing/RouteCollection.php
index 4525404d6d..6c642300a9 100644
--- a/src/Symfony/Component/Routing/RouteCollection.php
+++ b/src/Symfony/Component/Routing/RouteCollection.php
@@ -28,12 +28,12 @@ class RouteCollection implements \IteratorAggregate, \Countable
     /**
      * @var Route[]
      */
-    private $routes = array();
+    private $routes = [];
 
     /**
      * @var array
      */
-    private $resources = array();
+    private $resources = [];
 
     public function __clone()
     {
@@ -138,7 +138,7 @@ class RouteCollection implements \IteratorAggregate, \Countable
      * @param array  $defaults     An array of default values
      * @param array  $requirements An array of requirements
      */
-    public function addPrefix($prefix, array $defaults = array(), array $requirements = array())
+    public function addPrefix($prefix, array $defaults = [], array $requirements = [])
     {
         $prefix = trim(trim($prefix), '/');
 
@@ -158,7 +158,7 @@ class RouteCollection implements \IteratorAggregate, \Countable
      */
     public function addNamePrefix(string $prefix)
     {
-        $prefixedRoutes = array();
+        $prefixedRoutes = [];
 
         foreach ($this->routes as $name => $route) {
             $prefixedRoutes[$prefix.$name] = $route;
@@ -177,7 +177,7 @@ class RouteCollection implements \IteratorAggregate, \Countable
      * @param array  $defaults     An array of default values
      * @param array  $requirements An array of requirements
      */
-    public function setHost($pattern, array $defaults = array(), array $requirements = array())
+    public function setHost($pattern, array $defaults = [], array $requirements = [])
     {
         foreach ($this->routes as $route) {
             $route->setHost($pattern);
diff --git a/src/Symfony/Component/Routing/RouteCollectionBuilder.php b/src/Symfony/Component/Routing/RouteCollectionBuilder.php
index e0f307698d..eb0585bdf6 100644
--- a/src/Symfony/Component/Routing/RouteCollectionBuilder.php
+++ b/src/Symfony/Component/Routing/RouteCollectionBuilder.php
@@ -25,18 +25,18 @@ class RouteCollectionBuilder
     /**
      * @var Route[]|RouteCollectionBuilder[]
      */
-    private $routes = array();
+    private $routes = [];
 
     private $loader;
-    private $defaults = array();
+    private $defaults = [];
     private $prefix;
     private $host;
     private $condition;
-    private $requirements = array();
-    private $options = array();
+    private $requirements = [];
+    private $options = [];
     private $schemes;
     private $methods;
-    private $resources = array();
+    private $resources = [];
 
     public function __construct(LoaderInterface $loader = null)
     {
@@ -330,7 +330,7 @@ class RouteCollectionBuilder
         $methods = implode('_', $route->getMethods()).'_';
 
         $routeName = $methods.$route->getPath();
-        $routeName = str_replace(array('/', ':', '|', '-'), '_', $routeName);
+        $routeName = str_replace(['/', ':', '|', '-'], '_', $routeName);
         $routeName = preg_replace('/[^a-z0-9A-Z_.]+/', '', $routeName);
 
         // Collapse consecutive underscores down into a single underscore.
@@ -358,7 +358,7 @@ class RouteCollectionBuilder
         if ($this->loader->supports($resource, $type)) {
             $collections = $this->loader->load($resource, $type);
 
-            return \is_array($collections) ? $collections : array($collections);
+            return \is_array($collections) ? $collections : [$collections];
         }
 
         if (null === $resolver = $this->loader->getResolver()) {
@@ -371,6 +371,6 @@ class RouteCollectionBuilder
 
         $collections = $loader->load($resource, $type);
 
-        return \is_array($collections) ? $collections : array($collections);
+        return \is_array($collections) ? $collections : [$collections];
     }
 }
diff --git a/src/Symfony/Component/Routing/Router.php b/src/Symfony/Component/Routing/Router.php
index 3f4838ea02..5fa85a538a 100644
--- a/src/Symfony/Component/Routing/Router.php
+++ b/src/Symfony/Component/Routing/Router.php
@@ -66,7 +66,7 @@ class Router implements RouterInterface, RequestMatcherInterface
     /**
      * @var array
      */
-    protected $options = array();
+    protected $options = [];
 
     /**
      * @var LoggerInterface|null
@@ -81,7 +81,7 @@ class Router implements RouterInterface, RequestMatcherInterface
     /**
      * @var ExpressionFunctionProviderInterface[]
      */
-    private $expressionLanguageProviders = array();
+    private $expressionLanguageProviders = [];
 
     /**
      * @param LoaderInterface $loader   A LoaderInterface instance
@@ -90,7 +90,7 @@ class Router implements RouterInterface, RequestMatcherInterface
      * @param RequestContext  $context  The context
      * @param LoggerInterface $logger   A logger instance
      */
-    public function __construct(LoaderInterface $loader, $resource, array $options = array(), RequestContext $context = null, LoggerInterface $logger = null)
+    public function __construct(LoaderInterface $loader, $resource, array $options = [], RequestContext $context = null, LoggerInterface $logger = null)
     {
         $this->loader = $loader;
         $this->resource = $resource;
@@ -124,7 +124,7 @@ class Router implements RouterInterface, RequestMatcherInterface
      */
     public function setOptions(array $options)
     {
-        $this->options = array(
+        $this->options = [
             'cache_dir' => null,
             'debug' => false,
             'generator_class' => 'Symfony\\Component\\Routing\\Generator\\UrlGenerator',
@@ -137,10 +137,10 @@ class Router implements RouterInterface, RequestMatcherInterface
             'matcher_cache_class' => 'ProjectUrlMatcher',
             'resource_type' => null,
             'strict_requirements' => true,
-        );
+        ];
 
         // check option names and live merge, if errors are encountered Exception will be thrown
-        $invalid = array();
+        $invalid = [];
         foreach ($options as $key => $value) {
             if (array_key_exists($key, $this->options)) {
                 $this->options[$key] = $value;
@@ -235,7 +235,7 @@ class Router implements RouterInterface, RequestMatcherInterface
     /**
      * {@inheritdoc}
      */
-    public function generate($name, $parameters = array(), $referenceType = self::ABSOLUTE_PATH)
+    public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH)
     {
         return $this->getGenerator()->generate($name, $parameters, $referenceType);
     }
@@ -293,10 +293,10 @@ class Router implements RouterInterface, RequestMatcherInterface
                     }
                 }
 
-                $options = array(
+                $options = [
                     'class' => $this->options['matcher_cache_class'],
                     'base_class' => $this->options['matcher_base_class'],
-                );
+                ];
 
                 $cache->write($dumper->dump($options), $this->getRouteCollection()->getResources());
             }
@@ -327,10 +327,10 @@ class Router implements RouterInterface, RequestMatcherInterface
                 function (ConfigCacheInterface $cache) {
                     $dumper = $this->getGeneratorDumperInstance();
 
-                    $options = array(
+                    $options = [
                         'class' => $this->options['generator_cache_class'],
                         'base_class' => $this->options['generator_base_class'],
-                    );
+                    ];
 
                     $cache->write($dumper->dump($options), $this->getRouteCollection()->getResources());
                 }
diff --git a/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php b/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
index 4d6b2a9c8b..9697aac88b 100644
--- a/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/Annotation/RouteTest.php
@@ -21,7 +21,7 @@ class RouteTest extends TestCase
      */
     public function testInvalidRouteParameter()
     {
-        $route = new Route(array('foo' => 'bar'));
+        $route = new Route(['foo' => 'bar']);
     }
 
     /**
@@ -29,7 +29,7 @@ class RouteTest extends TestCase
      */
     public function testTryingToSetLocalesDirectly()
     {
-        $route = new Route(array('locales' => array('nl' => 'bar')));
+        $route = new Route(['locales' => ['nl' => 'bar']]);
     }
 
     /**
@@ -37,23 +37,23 @@ class RouteTest extends TestCase
      */
     public function testRouteParameters($parameter, $value, $getter)
     {
-        $route = new Route(array($parameter => $value));
+        $route = new Route([$parameter => $value]);
         $this->assertEquals($route->$getter(), $value);
     }
 
     public function getValidParameters()
     {
-        return array(
-            array('value', '/Blog', 'getPath'),
-            array('requirements', array('locale' => 'en'), 'getRequirements'),
-            array('options', array('compiler_class' => 'RouteCompiler'), 'getOptions'),
-            array('name', 'blog_index', 'getName'),
-            array('defaults', array('_controller' => 'MyBlogBundle:Blog:index'), 'getDefaults'),
-            array('schemes', array('https'), 'getSchemes'),
-            array('methods', array('GET', 'POST'), 'getMethods'),
-            array('host', '{locale}.example.com', 'getHost'),
-            array('condition', 'context.getMethod() == "GET"', 'getCondition'),
-            array('value', array('nl' => '/hier', 'en' => '/here'), 'getLocalizedPaths'),
-        );
+        return [
+            ['value', '/Blog', 'getPath'],
+            ['requirements', ['locale' => 'en'], 'getRequirements'],
+            ['options', ['compiler_class' => 'RouteCompiler'], 'getOptions'],
+            ['name', 'blog_index', 'getName'],
+            ['defaults', ['_controller' => 'MyBlogBundle:Blog:index'], 'getDefaults'],
+            ['schemes', ['https'], 'getSchemes'],
+            ['methods', ['GET', 'POST'], 'getMethods'],
+            ['host', '{locale}.example.com', 'getHost'],
+            ['condition', 'context.getMethod() == "GET"', 'getCondition'],
+            ['value', ['nl' => '/hier', 'en' => '/here'], 'getLocalizedPaths'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php b/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
index 5bec7bbd7c..9c9f4f2862 100644
--- a/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/CompiledRouteTest.php
@@ -18,10 +18,10 @@ class CompiledRouteTest extends TestCase
 {
     public function testAccessors()
     {
-        $compiled = new CompiledRoute('prefix', 'regex', array('tokens'), array(), null, array(), array(), array('variables'));
+        $compiled = new CompiledRoute('prefix', 'regex', ['tokens'], [], null, [], [], ['variables']);
         $this->assertEquals('prefix', $compiled->getStaticPrefix(), '__construct() takes a static prefix as its second argument');
         $this->assertEquals('regex', $compiled->getRegex(), '__construct() takes a regexp as its third argument');
-        $this->assertEquals(array('tokens'), $compiled->getTokens(), '__construct() takes an array of tokens as its fourth argument');
-        $this->assertEquals(array('variables'), $compiled->getVariables(), '__construct() takes an array of variables as its ninth argument');
+        $this->assertEquals(['tokens'], $compiled->getTokens(), '__construct() takes an array of tokens as its fourth argument');
+        $this->assertEquals(['variables'], $compiled->getVariables(), '__construct() takes an array of variables as its ninth argument');
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/DependencyInjection/RoutingResolverPassTest.php b/src/Symfony/Component/Routing/Tests/DependencyInjection/RoutingResolverPassTest.php
index 97a34c969c..30c7516e59 100644
--- a/src/Symfony/Component/Routing/Tests/DependencyInjection/RoutingResolverPassTest.php
+++ b/src/Symfony/Component/Routing/Tests/DependencyInjection/RoutingResolverPassTest.php
@@ -29,7 +29,7 @@ class RoutingResolverPassTest extends TestCase
         (new RoutingResolverPass())->process($container);
 
         $this->assertEquals(
-            array(array('addLoader', array(new Reference('loader1'))), array('addLoader', array(new Reference('loader2')))),
+            [['addLoader', [new Reference('loader1')]], ['addLoader', [new Reference('loader2')]]],
             $container->getDefinition('routing.resolver')->getMethodCalls()
         );
     }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php b/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php
index c2e2afd9af..22b942d7bc 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php
@@ -21,6 +21,6 @@ class CustomRouteCompiler extends RouteCompiler
      */
     public static function compile(Route $route)
     {
-        return new CustomCompiledRoute('', '', array(), array());
+        return new CustomCompiledRoute('', '', [], []);
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/RedirectableUrlMatcher.php b/src/Symfony/Component/Routing/Tests/Fixtures/RedirectableUrlMatcher.php
index 08b67a0767..79ae1cce54 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/RedirectableUrlMatcher.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/RedirectableUrlMatcher.php
@@ -21,10 +21,10 @@ class RedirectableUrlMatcher extends UrlMatcher implements RedirectableUrlMatche
 {
     public function redirect($path, $route, $scheme = null)
     {
-        return array(
+        return [
             '_controller' => 'Some controller reference...',
             'path' => $path,
             'scheme' => $scheme,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher1.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher1.php
index a357b4fde7..65c5ce0764 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher1.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher1.php
@@ -15,26 +15,26 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     {
         $this->context = $context;
         $this->matchHost = true;
-        $this->staticRoutes = array(
-            '/test/baz' => array(array(array('_route' => 'baz'), null, null, null, false, false, null)),
-            '/test/baz.html' => array(array(array('_route' => 'baz2'), null, null, null, false, false, null)),
-            '/test/baz3' => array(array(array('_route' => 'baz3'), null, null, null, true, false, null)),
-            '/foofoo' => array(array(array('_route' => 'foofoo', 'def' => 'test'), null, null, null, false, false, null)),
-            '/spa ce' => array(array(array('_route' => 'space'), null, null, null, false, false, null)),
-            '/multi/new' => array(array(array('_route' => 'overridden2'), null, null, null, false, false, null)),
-            '/multi/hey' => array(array(array('_route' => 'hey'), null, null, null, true, false, null)),
-            '/ababa' => array(array(array('_route' => 'ababa'), null, null, null, false, false, null)),
-            '/route1' => array(array(array('_route' => 'route1'), 'a.example.com', null, null, false, false, null)),
-            '/c2/route2' => array(array(array('_route' => 'route2'), 'a.example.com', null, null, false, false, null)),
-            '/route4' => array(array(array('_route' => 'route4'), 'a.example.com', null, null, false, false, null)),
-            '/c2/route3' => array(array(array('_route' => 'route3'), 'b.example.com', null, null, false, false, null)),
-            '/route5' => array(array(array('_route' => 'route5'), 'c.example.com', null, null, false, false, null)),
-            '/route6' => array(array(array('_route' => 'route6'), null, null, null, false, false, null)),
-            '/route11' => array(array(array('_route' => 'route11'), '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null)),
-            '/route12' => array(array(array('_route' => 'route12', 'var1' => 'val'), '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null)),
-            '/route17' => array(array(array('_route' => 'route17'), null, null, null, false, false, null)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/test/baz' => [[['_route' => 'baz'], null, null, null, false, false, null]],
+            '/test/baz.html' => [[['_route' => 'baz2'], null, null, null, false, false, null]],
+            '/test/baz3' => [[['_route' => 'baz3'], null, null, null, true, false, null]],
+            '/foofoo' => [[['_route' => 'foofoo', 'def' => 'test'], null, null, null, false, false, null]],
+            '/spa ce' => [[['_route' => 'space'], null, null, null, false, false, null]],
+            '/multi/new' => [[['_route' => 'overridden2'], null, null, null, false, false, null]],
+            '/multi/hey' => [[['_route' => 'hey'], null, null, null, true, false, null]],
+            '/ababa' => [[['_route' => 'ababa'], null, null, null, false, false, null]],
+            '/route1' => [[['_route' => 'route1'], 'a.example.com', null, null, false, false, null]],
+            '/c2/route2' => [[['_route' => 'route2'], 'a.example.com', null, null, false, false, null]],
+            '/route4' => [[['_route' => 'route4'], 'a.example.com', null, null, false, false, null]],
+            '/c2/route3' => [[['_route' => 'route3'], 'b.example.com', null, null, false, false, null]],
+            '/route5' => [[['_route' => 'route5'], 'c.example.com', null, null, false, false, null]],
+            '/route6' => [[['_route' => 'route6'], null, null, null, false, false, null]],
+            '/route11' => [[['_route' => 'route11'], '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null]],
+            '/route12' => [[['_route' => 'route12', 'var1' => 'val'], '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null]],
+            '/route17' => [[['_route' => 'route17'], null, null, null, false, false, null]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                 .'|(?:(?:[^./]*+\\.)++)(?'
                     .'|/foo/(baz|symfony)(*:47)'
@@ -81,33 +81,33 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
                     .')'
                 .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            47 => array(array(array('_route' => 'foo', 'def' => 'test'), array('bar'), null, null, false, true, null)),
-            70 => array(array(array('_route' => 'bar'), array('foo'), array('GET' => 0, 'HEAD' => 1), null, false, true, null)),
-            90 => array(array(array('_route' => 'barhead'), array('foo'), array('GET' => 0), null, false, true, null)),
-            115 => array(
-                array(array('_route' => 'baz4'), array('foo'), null, null, true, true, null),
-                array(array('_route' => 'baz5'), array('foo'), array('POST' => 0), null, true, true, null),
-                array(array('_route' => 'baz.baz6'), array('foo'), array('PUT' => 0), null, true, true, null),
-            ),
-            131 => array(array(array('_route' => 'quoter'), array('quoter'), null, null, false, true, null)),
-            160 => array(array(array('_route' => 'foo1'), array('foo'), array('PUT' => 0), null, false, true, null)),
-            168 => array(array(array('_route' => 'bar1'), array('bar'), null, null, false, true, null)),
-            181 => array(array(array('_route' => 'overridden'), array('var'), null, null, false, true, null)),
-            204 => array(array(array('_route' => 'foo2'), array('foo1'), null, null, false, true, null)),
-            212 => array(array(array('_route' => 'bar2'), array('bar1'), null, null, false, true, null)),
-            248 => array(array(array('_route' => 'helloWorld', 'who' => 'World!'), array('who'), null, null, false, true, null)),
-            279 => array(array(array('_route' => 'foo3'), array('_locale', 'foo'), null, null, false, true, null)),
-            287 => array(array(array('_route' => 'bar3'), array('_locale', 'bar'), null, null, false, true, null)),
-            309 => array(array(array('_route' => 'foo4'), array('foo'), null, null, false, true, null)),
-            371 => array(array(array('_route' => 'route13'), array('var1', 'name'), null, null, false, true, null)),
-            389 => array(array(array('_route' => 'route14', 'var1' => 'val'), array('var1', 'name'), null, null, false, true, null)),
-            441 => array(array(array('_route' => 'route15'), array('name'), null, null, false, true, null)),
-            489 => array(array(array('_route' => 'route16', 'var1' => 'val'), array('name'), null, null, false, true, null)),
-            510 => array(array(array('_route' => 'a'), array(), null, null, false, false, null)),
-            531 => array(array(array('_route' => 'b'), array('var'), null, null, false, true, null)),
-            549 => array(array(array('_route' => 'c'), array('var'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            47 => [[['_route' => 'foo', 'def' => 'test'], ['bar'], null, null, false, true, null]],
+            70 => [[['_route' => 'bar'], ['foo'], ['GET' => 0, 'HEAD' => 1], null, false, true, null]],
+            90 => [[['_route' => 'barhead'], ['foo'], ['GET' => 0], null, false, true, null]],
+            115 => [
+                [['_route' => 'baz4'], ['foo'], null, null, true, true, null],
+                [['_route' => 'baz5'], ['foo'], ['POST' => 0], null, true, true, null],
+                [['_route' => 'baz.baz6'], ['foo'], ['PUT' => 0], null, true, true, null],
+            ],
+            131 => [[['_route' => 'quoter'], ['quoter'], null, null, false, true, null]],
+            160 => [[['_route' => 'foo1'], ['foo'], ['PUT' => 0], null, false, true, null]],
+            168 => [[['_route' => 'bar1'], ['bar'], null, null, false, true, null]],
+            181 => [[['_route' => 'overridden'], ['var'], null, null, false, true, null]],
+            204 => [[['_route' => 'foo2'], ['foo1'], null, null, false, true, null]],
+            212 => [[['_route' => 'bar2'], ['bar1'], null, null, false, true, null]],
+            248 => [[['_route' => 'helloWorld', 'who' => 'World!'], ['who'], null, null, false, true, null]],
+            279 => [[['_route' => 'foo3'], ['_locale', 'foo'], null, null, false, true, null]],
+            287 => [[['_route' => 'bar3'], ['_locale', 'bar'], null, null, false, true, null]],
+            309 => [[['_route' => 'foo4'], ['foo'], null, null, false, true, null]],
+            371 => [[['_route' => 'route13'], ['var1', 'name'], null, null, false, true, null]],
+            389 => [[['_route' => 'route14', 'var1' => 'val'], ['var1', 'name'], null, null, false, true, null]],
+            441 => [[['_route' => 'route15'], ['name'], null, null, false, true, null]],
+            489 => [[['_route' => 'route16', 'var1' => 'val'], ['name'], null, null, false, true, null]],
+            510 => [[['_route' => 'a'], [], null, null, false, false, null]],
+            531 => [[['_route' => 'b'], ['var'], null, null, false, true, null]],
+            549 => [[['_route' => 'c'], ['var'], null, null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher10.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher10.php
index c8bce667e9..d93459c4c9 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher10.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher10.php
@@ -14,7 +14,7 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->regexpList = array(
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/c(?'
                         .'|f(?'
@@ -1769,1008 +1769,1008 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
                         .'|9c9ad/([^/]++)/([^/]++)/([^/]++)/49c9ad(*:49718)'
                     .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            54 => array(array(array('_route' => '_0'), array('a', 'b', 'c'), null, null, false, false, null)),
-            102 => array(array(array('_route' => '_190'), array('a', 'b', 'c'), null, null, false, false, null)),
-            147 => array(array(array('_route' => '_478'), array('a', 'b', 'c'), null, null, false, false, null)),
-            194 => array(array(array('_route' => '_259'), array('a', 'b', 'c'), null, null, false, false, null)),
-            240 => array(array(array('_route' => '_368'), array('a', 'b', 'c'), null, null, false, false, null)),
-            291 => array(array(array('_route' => '_1'), array('a', 'b', 'c'), null, null, false, false, null)),
-            337 => array(array(array('_route' => '_116'), array('a', 'b', 'c'), null, null, false, false, null)),
-            383 => array(array(array('_route' => '_490'), array('a', 'b', 'c'), null, null, false, false, null)),
-            434 => array(array(array('_route' => '_2'), array('a', 'b', 'c'), null, null, false, false, null)),
-            480 => array(array(array('_route' => '_124'), array('a', 'b', 'c'), null, null, false, false, null)),
-            526 => array(array(array('_route' => '_389'), array('a', 'b', 'c'), null, null, false, false, null)),
-            577 => array(array(array('_route' => '_8'), array('a', 'b', 'c'), null, null, false, false, null)),
-            623 => array(array(array('_route' => '_104'), array('a', 'b', 'c'), null, null, false, false, null)),
-            677 => array(array(array('_route' => '_12'), array('a', 'b', 'c'), null, null, false, false, null)),
-            722 => array(array(array('_route' => '_442'), array('a', 'b', 'c'), null, null, false, false, null)),
-            769 => array(array(array('_route' => '_253'), array('a', 'b', 'c'), null, null, false, false, null)),
-            820 => array(array(array('_route' => '_13'), array('a', 'b', 'c'), null, null, false, false, null)),
-            866 => array(array(array('_route' => '_254'), array('a', 'b', 'c'), null, null, false, false, null)),
-            912 => array(array(array('_route' => '_347'), array('a', 'b', 'c'), null, null, false, false, null)),
-            963 => array(array(array('_route' => '_16'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1009 => array(array(array('_route' => '_87'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1058 => array(array(array('_route' => '_31'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1109 => array(array(array('_route' => '_50'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1156 => array(array(array('_route' => '_219'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1203 => array(array(array('_route' => '_332'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1250 => array(array(array('_route' => '_359'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1302 => array(array(array('_route' => '_183'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1349 => array(array(array('_route' => '_500'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1401 => array(array(array('_route' => '_214'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1448 => array(array(array('_route' => '_321'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1497 => array(array(array('_route' => '_243'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1545 => array(array(array('_route' => '_328'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1596 => array(array(array('_route' => '_362'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1643 => array(array(array('_route' => '_488'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1701 => array(array(array('_route' => '_3'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1751 => array(array(array('_route' => '_102'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1797 => array(array(array('_route' => '_220'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1845 => array(array(array('_route' => '_127'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1897 => array(array(array('_route' => '_5'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1944 => array(array(array('_route' => '_242'), array('a', 'b', 'c'), null, null, false, false, null)),
-            1991 => array(array(array('_route' => '_397'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2038 => array(array(array('_route' => '_454'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2090 => array(array(array('_route' => '_34'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2137 => array(array(array('_route' => '_281'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2189 => array(array(array('_route' => '_64'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2236 => array(array(array('_route' => '_205'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2291 => array(array(array('_route' => '_71'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2337 => array(array(array('_route' => '_203'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2385 => array(array(array('_route' => '_97'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2437 => array(array(array('_route' => '_98'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2484 => array(array(array('_route' => '_267'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2531 => array(array(array('_route' => '_309'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2586 => array(array(array('_route' => '_117'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2631 => array(array(array('_route' => '_211'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2679 => array(array(array('_route' => '_484'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2731 => array(array(array('_route' => '_139'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2778 => array(array(array('_route' => '_421'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2830 => array(array(array('_route' => '_185'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2877 => array(array(array('_route' => '_439'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2926 => array(array(array('_route' => '_218'), array('a', 'b', 'c'), null, null, false, false, null)),
-            2977 => array(array(array('_route' => '_233'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3024 => array(array(array('_route' => '_483'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3073 => array(array(array('_route' => '_265'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3124 => array(array(array('_route' => '_299'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3171 => array(array(array('_route' => '_351'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3218 => array(array(array('_route' => '_472'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3267 => array(array(array('_route' => '_360'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3315 => array(array(array('_route' => '_466'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3372 => array(array(array('_route' => '_4'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3419 => array(array(array('_route' => '_142'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3466 => array(array(array('_route' => '_151'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3513 => array(array(array('_route' => '_308'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3560 => array(array(array('_route' => '_440'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3612 => array(array(array('_route' => '_14'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3659 => array(array(array('_route' => '_358'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3711 => array(array(array('_route' => '_37'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3758 => array(array(array('_route' => '_38'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3805 => array(array(array('_route' => '_146'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3852 => array(array(array('_route' => '_194'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3899 => array(array(array('_route' => '_487'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3948 => array(array(array('_route' => '_42'), array('a', 'b', 'c'), null, null, false, false, null)),
-            3999 => array(array(array('_route' => '_54'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4046 => array(array(array('_route' => '_326'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4098 => array(array(array('_route' => '_68'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4145 => array(array(array('_route' => '_108'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4197 => array(array(array('_route' => '_74'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4244 => array(array(array('_route' => '_315'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4291 => array(array(array('_route' => '_374'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4343 => array(array(array('_route' => '_99'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4390 => array(array(array('_route' => '_238'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4442 => array(array(array('_route' => '_107'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4489 => array(array(array('_route' => '_409'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4541 => array(array(array('_route' => '_122'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4588 => array(array(array('_route' => '_379'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4635 => array(array(array('_route' => '_390'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4687 => array(array(array('_route' => '_171'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4734 => array(array(array('_route' => '_260'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4781 => array(array(array('_route' => '_434'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4830 => array(array(array('_route' => '_189'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4878 => array(array(array('_route' => '_467'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4935 => array(array(array('_route' => '_6'), array('a', 'b', 'c'), null, null, false, false, null)),
-            4982 => array(array(array('_route' => '_286'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5029 => array(array(array('_route' => '_438'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5081 => array(array(array('_route' => '_19'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5131 => array(array(array('_route' => '_24'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5177 => array(array(array('_route' => '_172'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5230 => array(array(array('_route' => '_33'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5277 => array(array(array('_route' => '_400'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5324 => array(array(array('_route' => '_427'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5376 => array(array(array('_route' => '_35'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5423 => array(array(array('_route' => '_156'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5475 => array(array(array('_route' => '_36'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5522 => array(array(array('_route' => '_251'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5574 => array(array(array('_route' => '_43'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5621 => array(array(array('_route' => '_292'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5668 => array(array(array('_route' => '_411'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5720 => array(array(array('_route' => '_69'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5767 => array(array(array('_route' => '_159'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5814 => array(array(array('_route' => '_170'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5861 => array(array(array('_route' => '_376'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5913 => array(array(array('_route' => '_131'), array('a', 'b', 'c'), null, null, false, false, null)),
-            5960 => array(array(array('_route' => '_446'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6015 => array(array(array('_route' => '_140'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6061 => array(array(array('_route' => '_353'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6112 => array(array(array('_route' => '_224'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6158 => array(array(array('_route' => '_346'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6204 => array(array(array('_route' => '_443'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6254 => array(array(array('_route' => '_154'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6305 => array(array(array('_route' => '_212'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6352 => array(array(array('_route' => '_313'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6399 => array(array(array('_route' => '_395'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6446 => array(array(array('_route' => '_441'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6498 => array(array(array('_route' => '_223'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6545 => array(array(array('_route' => '_303'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6594 => array(array(array('_route' => '_410'), array('a', 'b', 'c'), null, null, false, false, null)),
-            6642 => array(array(array('_route' => '_494'), array('a', 'b', 'c'), null, null, false, false, null)),
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+            42631 => [[['_route' => '_940'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42684 => [[['_route' => '_563'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42732 => [[['_route' => '_611'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42780 => [[['_route' => '_830'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42833 => [[['_route' => '_569'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42881 => [[['_route' => '_908'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42929 => [[['_route' => '_913'], ['a', 'b', 'c'], null, null, false, false, null]],
+            42982 => [[['_route' => '_644'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43030 => [[['_route' => '_776'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43078 => [[['_route' => '_856'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43131 => [[['_route' => '_650'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43179 => [[['_route' => '_761'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43232 => [[['_route' => '_663'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43280 => [[['_route' => '_754'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43333 => [[['_route' => '_665'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43381 => [[['_route' => '_805'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43429 => [[['_route' => '_846'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43477 => [[['_route' => '_857'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43530 => [[['_route' => '_675'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43578 => [[['_route' => '_839'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43626 => [[['_route' => '_968'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43676 => [[['_route' => '_697'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43728 => [[['_route' => '_725'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43776 => [[['_route' => '_794'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43829 => [[['_route' => '_773'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43877 => [[['_route' => '_992'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43930 => [[['_route' => '_901'], ['a', 'b', 'c'], null, null, false, false, null]],
+            43978 => [[['_route' => '_970'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44028 => [[['_route' => '_964'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44086 => [[['_route' => '_530'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44134 => [[['_route' => '_703'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44187 => [[['_route' => '_533'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44235 => [[['_route' => '_739'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44283 => [[['_route' => '_791'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44331 => [[['_route' => '_987'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44384 => [[['_route' => '_566'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44432 => [[['_route' => '_592'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44488 => [[['_route' => '_568'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44534 => [[['_route' => '_868'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44583 => [[['_route' => '_878'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44636 => [[['_route' => '_588'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44684 => [[['_route' => '_793'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44732 => [[['_route' => '_917'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44785 => [[['_route' => '_600'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44833 => [[['_route' => '_728'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44886 => [[['_route' => '_603'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44934 => [[['_route' => '_765'], ['a', 'b', 'c'], null, null, false, false, null]],
+            44987 => [[['_route' => '_607'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45035 => [[['_route' => '_676'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45083 => [[['_route' => '_804'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45136 => [[['_route' => '_609'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45184 => [[['_route' => '_961'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45232 => [[['_route' => '_980'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45282 => [[['_route' => '_714'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45334 => [[['_route' => '_730'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45382 => [[['_route' => '_806'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45430 => [[['_route' => '_825'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45478 => [[['_route' => '_879'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45526 => [[['_route' => '_893'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45576 => [[['_route' => '_928'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45628 => [[['_route' => '_932'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45676 => [[['_route' => '_958'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45726 => [[['_route' => '_984'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45784 => [[['_route' => '_538'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45832 => [[['_route' => '_993'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45882 => [[['_route' => '_542'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45934 => [[['_route' => '_551'], ['a', 'b', 'c'], null, null, false, false, null]],
+            45982 => [[['_route' => '_687'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46030 => [[['_route' => '_724'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46078 => [[['_route' => '_925'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46131 => [[['_route' => '_587'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46179 => [[['_route' => '_914'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46229 => [[['_route' => '_616'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46284 => [[['_route' => '_677'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46331 => [[['_route' => '_815'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46380 => [[['_route' => '_781'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46430 => [[['_route' => '_717'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46482 => [[['_route' => '_782'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46530 => [[['_route' => '_832'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46583 => [[['_route' => '_795'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46631 => [[['_route' => '_887'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46681 => [[['_route' => '_800'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46730 => [[['_route' => '_826'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46779 => [[['_route' => '_881'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46828 => [[['_route' => '_886'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46877 => [[['_route' => '_938'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46935 => [[['_route' => '_540'], ['a', 'b', 'c'], null, null, false, false, null]],
+            46983 => [[['_route' => '_643'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47033 => [[['_route' => '_544'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47082 => [[['_route' => '_552'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47134 => [[['_route' => '_567'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47182 => [[['_route' => '_608'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47230 => [[['_route' => '_698'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47278 => [[['_route' => '_988'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47331 => [[['_route' => '_583'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47379 => [[['_route' => '_998'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47432 => [[['_route' => '_604'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47480 => [[['_route' => '_630'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47528 => [[['_route' => '_706'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47576 => [[['_route' => '_976'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47629 => [[['_route' => '_673'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47677 => [[['_route' => '_678'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47725 => [[['_route' => '_931'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47775 => [[['_route' => '_751'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47824 => [[['_route' => '_766'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47876 => [[['_route' => '_792'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47924 => [[['_route' => '_814'], ['a', 'b', 'c'], null, null, false, false, null]],
+            47974 => [[['_route' => '_798'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48026 => [[['_route' => '_851'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48074 => [[['_route' => '_941'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48122 => [[['_route' => '_953'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48170 => [[['_route' => '_975'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48220 => [[['_route' => '_873'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48269 => [[['_route' => '_936'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48318 => [[['_route' => '_994'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48376 => [[['_route' => '_562'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48424 => [[['_route' => '_770'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48475 => [[['_route' => '_774'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48522 => [[['_route' => '_966'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48573 => [[['_route' => '_582'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48625 => [[['_route' => '_606'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48673 => [[['_route' => '_648'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48723 => [[['_route' => '_624'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48775 => [[['_route' => '_626'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48823 => [[['_route' => '_821'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48873 => [[['_route' => '_628'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48922 => [[['_route' => '_638'], ['a', 'b', 'c'], null, null, false, false, null]],
+            48974 => [[['_route' => '_640'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49022 => [[['_route' => '_990'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49072 => [[['_route' => '_705'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49121 => [[['_route' => '_757'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49176 => [[['_route' => '_785'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49223 => [[['_route' => '_875'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49270 => [[['_route' => '_894'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49319 => [[['_route' => '_945'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49375 => [[['_route' => '_816'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49422 => [[['_route' => '_872'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49471 => [[['_route' => '_921'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49519 => [[['_route' => '_960'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49567 => [[['_route' => '_974'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49620 => [[['_route' => '_835'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49668 => [[['_route' => '_934'], ['a', 'b', 'c'], null, null, false, false, null]],
+            49718 => [[['_route' => '_869'], ['a', 'b', 'c'], null, null, false, false, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher11.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher11.php
index b0e4c02e06..e9ff494a0c 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher11.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher11.php
@@ -14,7 +14,7 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->regexpList = array(
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/(en|fr)/(?'
                         .'|admin/post(?'
@@ -45,22 +45,22 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
                     .')'
                     .'|/(en|fr)?(*:264)'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            32 => array(array(array('_route' => 'a', '_locale' => 'en'), array('_locale'), null, null, true, false, null)),
-            46 => array(array(array('_route' => 'b', '_locale' => 'en'), array('_locale'), null, null, false, false, null)),
-            58 => array(array(array('_route' => 'c', '_locale' => 'en'), array('_locale', 'id'), null, null, false, true, null)),
-            75 => array(array(array('_route' => 'd', '_locale' => 'en'), array('_locale', 'id'), null, null, false, false, null)),
-            94 => array(array(array('_route' => 'e', '_locale' => 'en'), array('_locale', 'id'), null, null, false, false, null)),
-            110 => array(array(array('_route' => 'f', '_locale' => 'en'), array('_locale'), null, null, true, false, null)),
-            130 => array(array(array('_route' => 'g', '_locale' => 'en'), array('_locale'), null, null, false, false, null)),
-            154 => array(array(array('_route' => 'h', '_locale' => 'en'), array('_locale', 'page'), null, null, false, true, null)),
-            175 => array(array(array('_route' => 'i', '_locale' => 'en'), array('_locale', 'page'), null, null, false, true, null)),
-            202 => array(array(array('_route' => 'j', '_locale' => 'en'), array('_locale', 'id'), null, null, false, false, null)),
-            216 => array(array(array('_route' => 'k', '_locale' => 'en'), array('_locale'), null, null, false, false, null)),
-            234 => array(array(array('_route' => 'l', '_locale' => 'en'), array('_locale'), null, null, false, false, null)),
-            245 => array(array(array('_route' => 'm', '_locale' => 'en'), array('_locale'), null, null, false, false, null)),
-            264 => array(array(array('_route' => 'n', '_locale' => 'en'), array('_locale'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            32 => [[['_route' => 'a', '_locale' => 'en'], ['_locale'], null, null, true, false, null]],
+            46 => [[['_route' => 'b', '_locale' => 'en'], ['_locale'], null, null, false, false, null]],
+            58 => [[['_route' => 'c', '_locale' => 'en'], ['_locale', 'id'], null, null, false, true, null]],
+            75 => [[['_route' => 'd', '_locale' => 'en'], ['_locale', 'id'], null, null, false, false, null]],
+            94 => [[['_route' => 'e', '_locale' => 'en'], ['_locale', 'id'], null, null, false, false, null]],
+            110 => [[['_route' => 'f', '_locale' => 'en'], ['_locale'], null, null, true, false, null]],
+            130 => [[['_route' => 'g', '_locale' => 'en'], ['_locale'], null, null, false, false, null]],
+            154 => [[['_route' => 'h', '_locale' => 'en'], ['_locale', 'page'], null, null, false, true, null]],
+            175 => [[['_route' => 'i', '_locale' => 'en'], ['_locale', 'page'], null, null, false, true, null]],
+            202 => [[['_route' => 'j', '_locale' => 'en'], ['_locale', 'id'], null, null, false, false, null]],
+            216 => [[['_route' => 'k', '_locale' => 'en'], ['_locale'], null, null, false, false, null]],
+            234 => [[['_route' => 'l', '_locale' => 'en'], ['_locale'], null, null, false, false, null]],
+            245 => [[['_route' => 'm', '_locale' => 'en'], ['_locale'], null, null, false, false, null]],
+            264 => [[['_route' => 'n', '_locale' => 'en'], ['_locale'], null, null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher12.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher12.php
index d9102b3d62..cd88785a07 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher12.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher12.php
@@ -14,7 +14,7 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->regexpList = array(
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/abc([^/]++)/(?'
                         .'|1(?'
@@ -33,14 +33,14 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
                         .')'
                     .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            27 => array(array(array('_route' => 'r1'), array('foo'), null, null, false, false, null)),
-            38 => array(array(array('_route' => 'r10'), array('foo'), null, null, false, false, null)),
-            46 => array(array(array('_route' => 'r100'), array('foo'), null, null, false, false, null)),
-            59 => array(array(array('_route' => 'r2'), array('foo'), null, null, false, false, null)),
-            70 => array(array(array('_route' => 'r20'), array('foo'), null, null, false, false, null)),
-            78 => array(array(array('_route' => 'r200'), array('foo'), null, null, false, false, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            27 => [[['_route' => 'r1'], ['foo'], null, null, false, false, null]],
+            38 => [[['_route' => 'r10'], ['foo'], null, null, false, false, null]],
+            46 => [[['_route' => 'r100'], ['foo'], null, null, false, false, null]],
+            59 => [[['_route' => 'r2'], ['foo'], null, null, false, false, null]],
+            70 => [[['_route' => 'r20'], ['foo'], null, null, false, false, null]],
+            78 => [[['_route' => 'r200'], ['foo'], null, null, false, false, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher13.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher13.php
index 25936e6e16..310b9c55de 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher13.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher13.php
@@ -15,7 +15,7 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     {
         $this->context = $context;
         $this->matchHost = true;
-        $this->regexpList = array(
+        $this->regexpList = [
             0 => '{^(?'
                 .'|(?i:([^\\.]++)\\.exampple\\.com)\\.(?'
                     .'|/abc([^/]++)(?'
@@ -23,12 +23,12 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
                     .')'
                 .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            56 => array(
-                array(array('_route' => 'r1'), array('foo', 'foo'), null, null, false, true, null),
-                array(array('_route' => 'r2'), array('foo', 'foo'), null, null, false, true, null),
-            ),
-        );
+        ];
+        $this->dynamicRoutes = [
+            56 => [
+                [['_route' => 'r1'], ['foo', 'foo'], null, null, false, true, null],
+                [['_route' => 'r2'], ['foo', 'foo'], null, null, false, true, null],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher2.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher2.php
index 310a92161e..397a68d82f 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher2.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher2.php
@@ -15,28 +15,28 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
     {
         $this->context = $context;
         $this->matchHost = true;
-        $this->staticRoutes = array(
-            '/test/baz' => array(array(array('_route' => 'baz'), null, null, null, false, false, null)),
-            '/test/baz.html' => array(array(array('_route' => 'baz2'), null, null, null, false, false, null)),
-            '/test/baz3' => array(array(array('_route' => 'baz3'), null, null, null, true, false, null)),
-            '/foofoo' => array(array(array('_route' => 'foofoo', 'def' => 'test'), null, null, null, false, false, null)),
-            '/spa ce' => array(array(array('_route' => 'space'), null, null, null, false, false, null)),
-            '/multi/new' => array(array(array('_route' => 'overridden2'), null, null, null, false, false, null)),
-            '/multi/hey' => array(array(array('_route' => 'hey'), null, null, null, true, false, null)),
-            '/ababa' => array(array(array('_route' => 'ababa'), null, null, null, false, false, null)),
-            '/route1' => array(array(array('_route' => 'route1'), 'a.example.com', null, null, false, false, null)),
-            '/c2/route2' => array(array(array('_route' => 'route2'), 'a.example.com', null, null, false, false, null)),
-            '/route4' => array(array(array('_route' => 'route4'), 'a.example.com', null, null, false, false, null)),
-            '/c2/route3' => array(array(array('_route' => 'route3'), 'b.example.com', null, null, false, false, null)),
-            '/route5' => array(array(array('_route' => 'route5'), 'c.example.com', null, null, false, false, null)),
-            '/route6' => array(array(array('_route' => 'route6'), null, null, null, false, false, null)),
-            '/route11' => array(array(array('_route' => 'route11'), '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null)),
-            '/route12' => array(array(array('_route' => 'route12', 'var1' => 'val'), '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null)),
-            '/route17' => array(array(array('_route' => 'route17'), null, null, null, false, false, null)),
-            '/secure' => array(array(array('_route' => 'secure'), null, null, array('https' => 0), false, false, null)),
-            '/nonsecure' => array(array(array('_route' => 'nonsecure'), null, null, array('http' => 0), false, false, null)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/test/baz' => [[['_route' => 'baz'], null, null, null, false, false, null]],
+            '/test/baz.html' => [[['_route' => 'baz2'], null, null, null, false, false, null]],
+            '/test/baz3' => [[['_route' => 'baz3'], null, null, null, true, false, null]],
+            '/foofoo' => [[['_route' => 'foofoo', 'def' => 'test'], null, null, null, false, false, null]],
+            '/spa ce' => [[['_route' => 'space'], null, null, null, false, false, null]],
+            '/multi/new' => [[['_route' => 'overridden2'], null, null, null, false, false, null]],
+            '/multi/hey' => [[['_route' => 'hey'], null, null, null, true, false, null]],
+            '/ababa' => [[['_route' => 'ababa'], null, null, null, false, false, null]],
+            '/route1' => [[['_route' => 'route1'], 'a.example.com', null, null, false, false, null]],
+            '/c2/route2' => [[['_route' => 'route2'], 'a.example.com', null, null, false, false, null]],
+            '/route4' => [[['_route' => 'route4'], 'a.example.com', null, null, false, false, null]],
+            '/c2/route3' => [[['_route' => 'route3'], 'b.example.com', null, null, false, false, null]],
+            '/route5' => [[['_route' => 'route5'], 'c.example.com', null, null, false, false, null]],
+            '/route6' => [[['_route' => 'route6'], null, null, null, false, false, null]],
+            '/route11' => [[['_route' => 'route11'], '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null]],
+            '/route12' => [[['_route' => 'route12', 'var1' => 'val'], '#^(?P<var1>[^\\.]++)\\.example\\.com$#sDi', null, null, false, false, null]],
+            '/route17' => [[['_route' => 'route17'], null, null, null, false, false, null]],
+            '/secure' => [[['_route' => 'secure'], null, null, ['https' => 0], false, false, null]],
+            '/nonsecure' => [[['_route' => 'nonsecure'], null, null, ['http' => 0], false, false, null]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                 .'|(?:(?:[^./]*+\\.)++)(?'
                     .'|/foo/(baz|symfony)(*:47)'
@@ -83,33 +83,33 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
                     .')'
                 .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            47 => array(array(array('_route' => 'foo', 'def' => 'test'), array('bar'), null, null, false, true, null)),
-            70 => array(array(array('_route' => 'bar'), array('foo'), array('GET' => 0, 'HEAD' => 1), null, false, true, null)),
-            90 => array(array(array('_route' => 'barhead'), array('foo'), array('GET' => 0), null, false, true, null)),
-            115 => array(
-                array(array('_route' => 'baz4'), array('foo'), null, null, true, true, null),
-                array(array('_route' => 'baz5'), array('foo'), array('POST' => 0), null, true, true, null),
-                array(array('_route' => 'baz.baz6'), array('foo'), array('PUT' => 0), null, true, true, null),
-            ),
-            131 => array(array(array('_route' => 'quoter'), array('quoter'), null, null, false, true, null)),
-            160 => array(array(array('_route' => 'foo1'), array('foo'), array('PUT' => 0), null, false, true, null)),
-            168 => array(array(array('_route' => 'bar1'), array('bar'), null, null, false, true, null)),
-            181 => array(array(array('_route' => 'overridden'), array('var'), null, null, false, true, null)),
-            204 => array(array(array('_route' => 'foo2'), array('foo1'), null, null, false, true, null)),
-            212 => array(array(array('_route' => 'bar2'), array('bar1'), null, null, false, true, null)),
-            248 => array(array(array('_route' => 'helloWorld', 'who' => 'World!'), array('who'), null, null, false, true, null)),
-            279 => array(array(array('_route' => 'foo3'), array('_locale', 'foo'), null, null, false, true, null)),
-            287 => array(array(array('_route' => 'bar3'), array('_locale', 'bar'), null, null, false, true, null)),
-            309 => array(array(array('_route' => 'foo4'), array('foo'), null, null, false, true, null)),
-            371 => array(array(array('_route' => 'route13'), array('var1', 'name'), null, null, false, true, null)),
-            389 => array(array(array('_route' => 'route14', 'var1' => 'val'), array('var1', 'name'), null, null, false, true, null)),
-            441 => array(array(array('_route' => 'route15'), array('name'), null, null, false, true, null)),
-            489 => array(array(array('_route' => 'route16', 'var1' => 'val'), array('name'), null, null, false, true, null)),
-            510 => array(array(array('_route' => 'a'), array(), null, null, false, false, null)),
-            531 => array(array(array('_route' => 'b'), array('var'), null, null, false, true, null)),
-            549 => array(array(array('_route' => 'c'), array('var'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            47 => [[['_route' => 'foo', 'def' => 'test'], ['bar'], null, null, false, true, null]],
+            70 => [[['_route' => 'bar'], ['foo'], ['GET' => 0, 'HEAD' => 1], null, false, true, null]],
+            90 => [[['_route' => 'barhead'], ['foo'], ['GET' => 0], null, false, true, null]],
+            115 => [
+                [['_route' => 'baz4'], ['foo'], null, null, true, true, null],
+                [['_route' => 'baz5'], ['foo'], ['POST' => 0], null, true, true, null],
+                [['_route' => 'baz.baz6'], ['foo'], ['PUT' => 0], null, true, true, null],
+            ],
+            131 => [[['_route' => 'quoter'], ['quoter'], null, null, false, true, null]],
+            160 => [[['_route' => 'foo1'], ['foo'], ['PUT' => 0], null, false, true, null]],
+            168 => [[['_route' => 'bar1'], ['bar'], null, null, false, true, null]],
+            181 => [[['_route' => 'overridden'], ['var'], null, null, false, true, null]],
+            204 => [[['_route' => 'foo2'], ['foo1'], null, null, false, true, null]],
+            212 => [[['_route' => 'bar2'], ['bar1'], null, null, false, true, null]],
+            248 => [[['_route' => 'helloWorld', 'who' => 'World!'], ['who'], null, null, false, true, null]],
+            279 => [[['_route' => 'foo3'], ['_locale', 'foo'], null, null, false, true, null]],
+            287 => [[['_route' => 'bar3'], ['_locale', 'bar'], null, null, false, true, null]],
+            309 => [[['_route' => 'foo4'], ['foo'], null, null, false, true, null]],
+            371 => [[['_route' => 'route13'], ['var1', 'name'], null, null, false, true, null]],
+            389 => [[['_route' => 'route14', 'var1' => 'val'], ['var1', 'name'], null, null, false, true, null]],
+            441 => [[['_route' => 'route15'], ['name'], null, null, false, true, null]],
+            489 => [[['_route' => 'route16', 'var1' => 'val'], ['name'], null, null, false, true, null]],
+            510 => [[['_route' => 'a'], [], null, null, false, false, null]],
+            531 => [[['_route' => 'b'], ['var'], null, null, false, true, null]],
+            549 => [[['_route' => 'c'], ['var'], null, null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher3.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher3.php
index 9cc1594f08..0792a8f3be 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher3.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher3.php
@@ -14,18 +14,18 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->staticRoutes = array(
-            '/rootprefix/test' => array(array(array('_route' => 'static'), null, null, null, false, false, null)),
-            '/with-condition' => array(array(array('_route' => 'with-condition'), null, null, null, false, false, -1)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/rootprefix/test' => [[['_route' => 'static'], null, null, null, false, false, null]],
+            '/with-condition' => [[['_route' => 'with-condition'], null, null, null, false, false, -1]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/rootprefix/([^/]++)(*:27)'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            27 => array(array(array('_route' => 'dynamic'), array('var'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            27 => [[['_route' => 'dynamic'], ['var'], null, null, false, true, null]],
+        ];
         $this->checkCondition = static function ($condition, $context, $request) {
             switch ($condition) {
                 case -1: return ($context->getMethod() == "GET");
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher4.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher4.php
index 3f099d60c3..4b0dc156a3 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher4.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher4.php
@@ -14,15 +14,15 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->staticRoutes = array(
-            '/just_head' => array(array(array('_route' => 'just_head'), null, array('HEAD' => 0), null, false, false, null)),
-            '/head_and_get' => array(array(array('_route' => 'head_and_get'), null, array('HEAD' => 0, 'GET' => 1), null, false, false, null)),
-            '/get_and_head' => array(array(array('_route' => 'get_and_head'), null, array('GET' => 0, 'HEAD' => 1), null, false, false, null)),
-            '/post_and_head' => array(array(array('_route' => 'post_and_head'), null, array('POST' => 0, 'HEAD' => 1), null, false, false, null)),
-            '/put_and_post' => array(
-                array(array('_route' => 'put_and_post'), null, array('PUT' => 0, 'POST' => 1), null, false, false, null),
-                array(array('_route' => 'put_and_get_and_head'), null, array('PUT' => 0, 'GET' => 1, 'HEAD' => 2), null, false, false, null),
-            ),
-        );
+        $this->staticRoutes = [
+            '/just_head' => [[['_route' => 'just_head'], null, ['HEAD' => 0], null, false, false, null]],
+            '/head_and_get' => [[['_route' => 'head_and_get'], null, ['HEAD' => 0, 'GET' => 1], null, false, false, null]],
+            '/get_and_head' => [[['_route' => 'get_and_head'], null, ['GET' => 0, 'HEAD' => 1], null, false, false, null]],
+            '/post_and_head' => [[['_route' => 'post_and_head'], null, ['POST' => 0, 'HEAD' => 1], null, false, false, null]],
+            '/put_and_post' => [
+                [['_route' => 'put_and_post'], null, ['PUT' => 0, 'POST' => 1], null, false, false, null],
+                [['_route' => 'put_and_get_and_head'], null, ['PUT' => 0, 'GET' => 1, 'HEAD' => 2], null, false, false, null],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher5.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher5.php
index a33ea83012..a11d55a9fb 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher5.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher5.php
@@ -14,29 +14,29 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->staticRoutes = array(
-            '/a/11' => array(array(array('_route' => 'a_first'), null, null, null, false, false, null)),
-            '/a/22' => array(array(array('_route' => 'a_second'), null, null, null, false, false, null)),
-            '/a/333' => array(array(array('_route' => 'a_third'), null, null, null, false, false, null)),
-            '/a/44' => array(array(array('_route' => 'a_fourth'), null, null, null, true, false, null)),
-            '/a/55' => array(array(array('_route' => 'a_fifth'), null, null, null, true, false, null)),
-            '/a/66' => array(array(array('_route' => 'a_sixth'), null, null, null, true, false, null)),
-            '/nested/group/a' => array(array(array('_route' => 'nested_a'), null, null, null, true, false, null)),
-            '/nested/group/b' => array(array(array('_route' => 'nested_b'), null, null, null, true, false, null)),
-            '/nested/group/c' => array(array(array('_route' => 'nested_c'), null, null, null, true, false, null)),
-            '/slashed/group' => array(array(array('_route' => 'slashed_a'), null, null, null, true, false, null)),
-            '/slashed/group/b' => array(array(array('_route' => 'slashed_b'), null, null, null, true, false, null)),
-            '/slashed/group/c' => array(array(array('_route' => 'slashed_c'), null, null, null, true, false, null)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/a/11' => [[['_route' => 'a_first'], null, null, null, false, false, null]],
+            '/a/22' => [[['_route' => 'a_second'], null, null, null, false, false, null]],
+            '/a/333' => [[['_route' => 'a_third'], null, null, null, false, false, null]],
+            '/a/44' => [[['_route' => 'a_fourth'], null, null, null, true, false, null]],
+            '/a/55' => [[['_route' => 'a_fifth'], null, null, null, true, false, null]],
+            '/a/66' => [[['_route' => 'a_sixth'], null, null, null, true, false, null]],
+            '/nested/group/a' => [[['_route' => 'nested_a'], null, null, null, true, false, null]],
+            '/nested/group/b' => [[['_route' => 'nested_b'], null, null, null, true, false, null]],
+            '/nested/group/c' => [[['_route' => 'nested_c'], null, null, null, true, false, null]],
+            '/slashed/group' => [[['_route' => 'slashed_a'], null, null, null, true, false, null]],
+            '/slashed/group/b' => [[['_route' => 'slashed_b'], null, null, null, true, false, null]],
+            '/slashed/group/c' => [[['_route' => 'slashed_c'], null, null, null, true, false, null]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/([^/]++)(*:16)'
                     .'|/nested/([^/]++)(*:39)'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            16 => array(array(array('_route' => 'a_wildcard'), array('param'), null, null, false, true, null)),
-            39 => array(array(array('_route' => 'nested_wildcard'), array('param'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            16 => [[['_route' => 'a_wildcard'], ['param'], null, null, false, true, null]],
+            39 => [[['_route' => 'nested_wildcard'], ['param'], null, null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher6.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher6.php
index 02a484037f..f99c8fe606 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher6.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher6.php
@@ -14,17 +14,17 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->staticRoutes = array(
-            '/trailing/simple/no-methods' => array(array(array('_route' => 'simple_trailing_slash_no_methods'), null, null, null, true, false, null)),
-            '/trailing/simple/get-method' => array(array(array('_route' => 'simple_trailing_slash_GET_method'), null, array('GET' => 0), null, true, false, null)),
-            '/trailing/simple/head-method' => array(array(array('_route' => 'simple_trailing_slash_HEAD_method'), null, array('HEAD' => 0), null, true, false, null)),
-            '/trailing/simple/post-method' => array(array(array('_route' => 'simple_trailing_slash_POST_method'), null, array('POST' => 0), null, true, false, null)),
-            '/not-trailing/simple/no-methods' => array(array(array('_route' => 'simple_not_trailing_slash_no_methods'), null, null, null, false, false, null)),
-            '/not-trailing/simple/get-method' => array(array(array('_route' => 'simple_not_trailing_slash_GET_method'), null, array('GET' => 0), null, false, false, null)),
-            '/not-trailing/simple/head-method' => array(array(array('_route' => 'simple_not_trailing_slash_HEAD_method'), null, array('HEAD' => 0), null, false, false, null)),
-            '/not-trailing/simple/post-method' => array(array(array('_route' => 'simple_not_trailing_slash_POST_method'), null, array('POST' => 0), null, false, false, null)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/trailing/simple/no-methods' => [[['_route' => 'simple_trailing_slash_no_methods'], null, null, null, true, false, null]],
+            '/trailing/simple/get-method' => [[['_route' => 'simple_trailing_slash_GET_method'], null, ['GET' => 0], null, true, false, null]],
+            '/trailing/simple/head-method' => [[['_route' => 'simple_trailing_slash_HEAD_method'], null, ['HEAD' => 0], null, true, false, null]],
+            '/trailing/simple/post-method' => [[['_route' => 'simple_trailing_slash_POST_method'], null, ['POST' => 0], null, true, false, null]],
+            '/not-trailing/simple/no-methods' => [[['_route' => 'simple_not_trailing_slash_no_methods'], null, null, null, false, false, null]],
+            '/not-trailing/simple/get-method' => [[['_route' => 'simple_not_trailing_slash_GET_method'], null, ['GET' => 0], null, false, false, null]],
+            '/not-trailing/simple/head-method' => [[['_route' => 'simple_not_trailing_slash_HEAD_method'], null, ['HEAD' => 0], null, false, false, null]],
+            '/not-trailing/simple/post-method' => [[['_route' => 'simple_not_trailing_slash_POST_method'], null, ['POST' => 0], null, false, false, null]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/trailing/regex/(?'
                         .'|no\\-methods/([^/]++)(*:46)'
@@ -39,16 +39,16 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
                         .'|post\\-method/([^/]++)(*:269)'
                     .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            46 => array(array(array('_route' => 'regex_trailing_slash_no_methods'), array('param'), null, null, true, true, null)),
-            73 => array(array(array('_route' => 'regex_trailing_slash_GET_method'), array('param'), array('GET' => 0), null, true, true, null)),
-            101 => array(array(array('_route' => 'regex_trailing_slash_HEAD_method'), array('param'), array('HEAD' => 0), null, true, true, null)),
-            130 => array(array(array('_route' => 'regex_trailing_slash_POST_method'), array('param'), array('POST' => 0), null, true, true, null)),
-            183 => array(array(array('_route' => 'regex_not_trailing_slash_no_methods'), array('param'), null, null, false, true, null)),
-            211 => array(array(array('_route' => 'regex_not_trailing_slash_GET_method'), array('param'), array('GET' => 0), null, false, true, null)),
-            240 => array(array(array('_route' => 'regex_not_trailing_slash_HEAD_method'), array('param'), array('HEAD' => 0), null, false, true, null)),
-            269 => array(array(array('_route' => 'regex_not_trailing_slash_POST_method'), array('param'), array('POST' => 0), null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            46 => [[['_route' => 'regex_trailing_slash_no_methods'], ['param'], null, null, true, true, null]],
+            73 => [[['_route' => 'regex_trailing_slash_GET_method'], ['param'], ['GET' => 0], null, true, true, null]],
+            101 => [[['_route' => 'regex_trailing_slash_HEAD_method'], ['param'], ['HEAD' => 0], null, true, true, null]],
+            130 => [[['_route' => 'regex_trailing_slash_POST_method'], ['param'], ['POST' => 0], null, true, true, null]],
+            183 => [[['_route' => 'regex_not_trailing_slash_no_methods'], ['param'], null, null, false, true, null]],
+            211 => [[['_route' => 'regex_not_trailing_slash_GET_method'], ['param'], ['GET' => 0], null, false, true, null]],
+            240 => [[['_route' => 'regex_not_trailing_slash_HEAD_method'], ['param'], ['HEAD' => 0], null, false, true, null]],
+            269 => [[['_route' => 'regex_not_trailing_slash_POST_method'], ['param'], ['POST' => 0], null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher7.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher7.php
index 1866bf42b0..f44b13bce9 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher7.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher7.php
@@ -14,17 +14,17 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->staticRoutes = array(
-            '/trailing/simple/no-methods' => array(array(array('_route' => 'simple_trailing_slash_no_methods'), null, null, null, true, false, null)),
-            '/trailing/simple/get-method' => array(array(array('_route' => 'simple_trailing_slash_GET_method'), null, array('GET' => 0), null, true, false, null)),
-            '/trailing/simple/head-method' => array(array(array('_route' => 'simple_trailing_slash_HEAD_method'), null, array('HEAD' => 0), null, true, false, null)),
-            '/trailing/simple/post-method' => array(array(array('_route' => 'simple_trailing_slash_POST_method'), null, array('POST' => 0), null, true, false, null)),
-            '/not-trailing/simple/no-methods' => array(array(array('_route' => 'simple_not_trailing_slash_no_methods'), null, null, null, false, false, null)),
-            '/not-trailing/simple/get-method' => array(array(array('_route' => 'simple_not_trailing_slash_GET_method'), null, array('GET' => 0), null, false, false, null)),
-            '/not-trailing/simple/head-method' => array(array(array('_route' => 'simple_not_trailing_slash_HEAD_method'), null, array('HEAD' => 0), null, false, false, null)),
-            '/not-trailing/simple/post-method' => array(array(array('_route' => 'simple_not_trailing_slash_POST_method'), null, array('POST' => 0), null, false, false, null)),
-        );
-        $this->regexpList = array(
+        $this->staticRoutes = [
+            '/trailing/simple/no-methods' => [[['_route' => 'simple_trailing_slash_no_methods'], null, null, null, true, false, null]],
+            '/trailing/simple/get-method' => [[['_route' => 'simple_trailing_slash_GET_method'], null, ['GET' => 0], null, true, false, null]],
+            '/trailing/simple/head-method' => [[['_route' => 'simple_trailing_slash_HEAD_method'], null, ['HEAD' => 0], null, true, false, null]],
+            '/trailing/simple/post-method' => [[['_route' => 'simple_trailing_slash_POST_method'], null, ['POST' => 0], null, true, false, null]],
+            '/not-trailing/simple/no-methods' => [[['_route' => 'simple_not_trailing_slash_no_methods'], null, null, null, false, false, null]],
+            '/not-trailing/simple/get-method' => [[['_route' => 'simple_not_trailing_slash_GET_method'], null, ['GET' => 0], null, false, false, null]],
+            '/not-trailing/simple/head-method' => [[['_route' => 'simple_not_trailing_slash_HEAD_method'], null, ['HEAD' => 0], null, false, false, null]],
+            '/not-trailing/simple/post-method' => [[['_route' => 'simple_not_trailing_slash_POST_method'], null, ['POST' => 0], null, false, false, null]],
+        ];
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/trailing/regex/(?'
                         .'|no\\-methods/([^/]++)(*:46)'
@@ -39,16 +39,16 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Tests\Fixtures\Redirec
                         .'|post\\-method/([^/]++)(*:269)'
                     .')'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            46 => array(array(array('_route' => 'regex_trailing_slash_no_methods'), array('param'), null, null, true, true, null)),
-            73 => array(array(array('_route' => 'regex_trailing_slash_GET_method'), array('param'), array('GET' => 0), null, true, true, null)),
-            101 => array(array(array('_route' => 'regex_trailing_slash_HEAD_method'), array('param'), array('HEAD' => 0), null, true, true, null)),
-            130 => array(array(array('_route' => 'regex_trailing_slash_POST_method'), array('param'), array('POST' => 0), null, true, true, null)),
-            183 => array(array(array('_route' => 'regex_not_trailing_slash_no_methods'), array('param'), null, null, false, true, null)),
-            211 => array(array(array('_route' => 'regex_not_trailing_slash_GET_method'), array('param'), array('GET' => 0), null, false, true, null)),
-            240 => array(array(array('_route' => 'regex_not_trailing_slash_HEAD_method'), array('param'), array('HEAD' => 0), null, false, true, null)),
-            269 => array(array(array('_route' => 'regex_not_trailing_slash_POST_method'), array('param'), array('POST' => 0), null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            46 => [[['_route' => 'regex_trailing_slash_no_methods'], ['param'], null, null, true, true, null]],
+            73 => [[['_route' => 'regex_trailing_slash_GET_method'], ['param'], ['GET' => 0], null, true, true, null]],
+            101 => [[['_route' => 'regex_trailing_slash_HEAD_method'], ['param'], ['HEAD' => 0], null, true, true, null]],
+            130 => [[['_route' => 'regex_trailing_slash_POST_method'], ['param'], ['POST' => 0], null, true, true, null]],
+            183 => [[['_route' => 'regex_not_trailing_slash_no_methods'], ['param'], null, null, false, true, null]],
+            211 => [[['_route' => 'regex_not_trailing_slash_GET_method'], ['param'], ['GET' => 0], null, false, true, null]],
+            240 => [[['_route' => 'regex_not_trailing_slash_HEAD_method'], ['param'], ['HEAD' => 0], null, false, true, null]],
+            269 => [[['_route' => 'regex_not_trailing_slash_POST_method'], ['param'], ['POST' => 0], null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher8.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher8.php
index 7605389e60..ffac5d2d92 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher8.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher8.php
@@ -14,7 +14,7 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     public function __construct(RequestContext $context)
     {
         $this->context = $context;
-        $this->regexpList = array(
+        $this->regexpList = [
             0 => '{^(?'
                     .'|/(a)(*:11)'
                 .')/?$}sD',
@@ -24,11 +24,11 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
             22 => '{^(?'
                     .'|/(.)(*:33)'
                 .')/?$}sD',
-        );
-        $this->dynamicRoutes = array(
-            11 => array(array(array('_route' => 'a'), array('a'), null, null, false, true, null)),
-            22 => array(array(array('_route' => 'b'), array('a'), null, null, false, true, null)),
-            33 => array(array(array('_route' => 'c'), array('a'), null, null, false, true, null)),
-        );
+        ];
+        $this->dynamicRoutes = [
+            11 => [[['_route' => 'a'], ['a'], null, null, false, true, null]],
+            22 => [[['_route' => 'b'], ['a'], null, null, false, true, null]],
+            33 => [[['_route' => 'c'], ['a'], null, null, false, true, null]],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher9.php b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher9.php
index 9ccd0227eb..5716496149 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher9.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/dumper/url_matcher9.php
@@ -15,12 +15,12 @@ class ProjectUrlMatcher extends Symfony\Component\Routing\Matcher\UrlMatcher
     {
         $this->context = $context;
         $this->matchHost = true;
-        $this->staticRoutes = array(
-            '/' => array(
-                array(array('_route' => 'a'), '#^(?P<d>[^\\.]++)\\.e\\.c\\.b\\.a$#sDi', null, null, false, false, null),
-                array(array('_route' => 'c'), '#^(?P<e>[^\\.]++)\\.e\\.c\\.b\\.a$#sDi', null, null, false, false, null),
-                array(array('_route' => 'b'), 'd.c.b.a', null, null, false, false, null),
-            ),
-        );
+        $this->staticRoutes = [
+            '/' => [
+                [['_route' => 'a'], '#^(?P<d>[^\\.]++)\\.e\\.c\\.b\\.a$#sDi', null, null, false, false, null],
+                [['_route' => 'c'], '#^(?P<e>[^\\.]++)\\.e\\.c\\.b\\.a$#sDi', null, null, false, false, null],
+                [['_route' => 'b'], 'd.c.b.a', null, null, false, false, null],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_bar.php b/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_bar.php
index e2b91b17da..e6ccf24f4e 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_bar.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_bar.php
@@ -6,7 +6,7 @@ return function (RoutingConfigurator $routes) {
     $collection = $routes->collection();
 
     $collection->add('bar_route', '/bar')
-        ->defaults(array('_controller' => 'AppBundle:Bar:view'));
+        ->defaults(['_controller' => 'AppBundle:Bar:view']);
 
     return $collection;
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_baz.php b/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_baz.php
index ca8f188a76..cce65d7054 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_baz.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/glob/php_dsl_baz.php
@@ -6,7 +6,7 @@ return function (RoutingConfigurator $routes) {
     $collection = $routes->collection();
 
     $collection->add('baz_route', '/baz')
-        ->defaults(array('_controller' => 'AppBundle:Baz:view'));
+        ->defaults(['_controller' => 'AppBundle:Baz:view']);
 
     return $collection;
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl.php b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl.php
index fbcab15a3a..86caa99696 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl.php
@@ -7,13 +7,13 @@ return function (RoutingConfigurator $routes) {
         ->collection()
         ->add('foo', '/foo')
             ->condition('abc')
-            ->options(array('utf8' => true))
+            ->options(['utf8' => true])
         ->add('buz', 'zub')
             ->controller('foo:act');
 
     $routes->import('php_dsl_sub.php')
         ->prefix('/sub')
-        ->requirements(array('id' => '\d+'));
+        ->requirements(['id' => '\d+']);
 
     $routes->import('php_dsl_sub.php')
         ->namePrefix('z_')
@@ -23,7 +23,7 @@ return function (RoutingConfigurator $routes) {
         ->prefix('/bus', false);
 
     $routes->add('ouf', '/ouf')
-        ->schemes(array('https'))
-        ->methods(array('GET'))
-        ->defaults(array('id' => 0));
+        ->schemes(['https'])
+        ->methods(['GET'])
+        ->defaults(['id' => 0]);
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_i18n.php b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_i18n.php
index ed4a0e22e1..7489360cc2 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_i18n.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_i18n.php
@@ -5,13 +5,13 @@ namespace Symfony\Component\Routing\Loader\Configurator;
 return function (RoutingConfigurator $routes) {
     $routes
         ->collection()
-        ->prefix(array('en' => '/glish'))
+        ->prefix(['en' => '/glish'])
         ->add('foo', '/foo')
-        ->add('bar', array('en' => '/bar'));
+        ->add('bar', ['en' => '/bar']);
 
     $routes
-        ->add('baz', array('en' => '/baz'));
+        ->add('baz', ['en' => '/baz']);
 
     $routes->import('php_dsl_sub_i18n.php')
-        ->prefix(array('fr' => '/ench'));
+        ->prefix(['fr' => '/ench']);
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_sub_i18n.php b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_sub_i18n.php
index c112e716ce..e79edc869d 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_sub_i18n.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/php_dsl_sub_i18n.php
@@ -6,6 +6,6 @@ return function (RoutingConfigurator $routes) {
     $add = $routes->collection('c_')
         ->prefix('pub');
 
-    $add('foo', array('fr' => '/foo'));
-    $add('bar', array('fr' => '/bar'));
+    $add('foo', ['fr' => '/foo']);
+    $add('bar', ['fr' => '/bar']);
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/php_object_dsl.php b/src/Symfony/Component/Routing/Tests/Fixtures/php_object_dsl.php
index f21f402efd..9b9183a1b9 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/php_object_dsl.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/php_object_dsl.php
@@ -9,13 +9,13 @@ return new class() {
             ->collection()
             ->add('foo', '/foo')
             ->condition('abc')
-            ->options(array('utf8' => true))
+            ->options(['utf8' => true])
             ->add('buz', 'zub')
             ->controller('foo:act');
 
         $routes->import('php_dsl_sub.php')
             ->prefix('/sub')
-            ->requirements(array('id' => '\d+'));
+            ->requirements(['id' => '\d+']);
 
         $routes->import('php_dsl_sub.php')
             ->namePrefix('z_')
@@ -25,8 +25,8 @@ return new class() {
             ->prefix('/bus', false);
 
         $routes->add('ouf', '/ouf')
-            ->schemes(array('https'))
-            ->methods(array('GET'))
-            ->defaults(array('id' => 0));
+            ->schemes(['https'])
+            ->methods(['GET'])
+            ->defaults(['id' => 0]);
     }
 };
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/validpattern.php b/src/Symfony/Component/Routing/Tests/Fixtures/validpattern.php
index 52ddfde020..3ef0e14862 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/validpattern.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/validpattern.php
@@ -6,12 +6,12 @@ use Symfony\Component\Routing\RouteCollection;
 $collection = new RouteCollection();
 $collection->add('blog_show', new Route(
     '/blog/{slug}',
-    array('_controller' => 'MyBlogBundle:Blog:show'),
-    array('locale' => '\w+'),
-    array('compiler_class' => 'RouteCompiler'),
+    ['_controller' => 'MyBlogBundle:Blog:show'],
+    ['locale' => '\w+'],
+    ['compiler_class' => 'RouteCompiler'],
     '{locale}.example.com',
-    array('https'),
-    array('GET', 'POST', 'put', 'OpTiOnS'),
+    ['https'],
+    ['GET', 'POST', 'put', 'OpTiOnS'],
     'context.getMethod() == "GET"'
 ));
 
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/validresource.php b/src/Symfony/Component/Routing/Tests/Fixtures/validresource.php
index 482c80b29e..31d354a34c 100644
--- a/src/Symfony/Component/Routing/Tests/Fixtures/validresource.php
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/validresource.php
@@ -3,15 +3,15 @@
 /** @var $loader \Symfony\Component\Routing\Loader\PhpFileLoader */
 /** @var \Symfony\Component\Routing\RouteCollection $collection */
 $collection = $loader->import('validpattern.php');
-$collection->addDefaults(array(
+$collection->addDefaults([
     'foo' => 123,
-));
-$collection->addRequirements(array(
+]);
+$collection->addRequirements([
     'foo' => '\d+',
-));
-$collection->addOptions(array(
+]);
+$collection->addOptions([
     'foo' => 'bar',
-));
+]);
 $collection->setCondition('context.getMethod() == "POST"');
 $collection->addPrefix('/prefix');
 
diff --git a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
index 45464c3a90..f38e30de98 100644
--- a/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Generator/Dumper/PhpGeneratorDumperTest.php
@@ -73,10 +73,10 @@ class PhpGeneratorDumperTest extends TestCase
 
         $projectUrlGenerator = new \ProjectUrlGenerator(new RequestContext('/app.php'));
 
-        $absoluteUrlWithParameter = $projectUrlGenerator->generate('Test', array('foo' => 'bar'), UrlGeneratorInterface::ABSOLUTE_URL);
-        $absoluteUrlWithoutParameter = $projectUrlGenerator->generate('Test2', array(), UrlGeneratorInterface::ABSOLUTE_URL);
-        $relativeUrlWithParameter = $projectUrlGenerator->generate('Test', array('foo' => 'bar'), UrlGeneratorInterface::ABSOLUTE_PATH);
-        $relativeUrlWithoutParameter = $projectUrlGenerator->generate('Test2', array(), UrlGeneratorInterface::ABSOLUTE_PATH);
+        $absoluteUrlWithParameter = $projectUrlGenerator->generate('Test', ['foo' => 'bar'], UrlGeneratorInterface::ABSOLUTE_URL);
+        $absoluteUrlWithoutParameter = $projectUrlGenerator->generate('Test2', [], UrlGeneratorInterface::ABSOLUTE_URL);
+        $relativeUrlWithParameter = $projectUrlGenerator->generate('Test', ['foo' => 'bar'], UrlGeneratorInterface::ABSOLUTE_PATH);
+        $relativeUrlWithoutParameter = $projectUrlGenerator->generate('Test2', [], UrlGeneratorInterface::ABSOLUTE_PATH);
 
         $this->assertEquals('http://localhost/app.php/testing/bar', $absoluteUrlWithParameter);
         $this->assertEquals('http://localhost/app.php/testing2', $absoluteUrlWithoutParameter);
@@ -90,9 +90,9 @@ class PhpGeneratorDumperTest extends TestCase
         $this->routeCollection->add('test.en', (new Route('/testing/is/fun'))->setDefault('_locale', 'en')->setDefault('_canonical_route', 'test'));
         $this->routeCollection->add('test.nl', (new Route('/testen/is/leuk'))->setDefault('_locale', 'nl')->setDefault('_canonical_route', 'test'));
 
-        $code = $this->generatorDumper->dump(array(
+        $code = $this->generatorDumper->dump([
             'class' => 'SimpleLocalizedProjectUrlGenerator',
-        ));
+        ]);
         file_put_contents($this->testTmpFilepath, $code);
         include $this->testTmpFilepath;
 
@@ -100,7 +100,7 @@ class PhpGeneratorDumperTest extends TestCase
         $projectUrlGenerator = new \SimpleLocalizedProjectUrlGenerator($context, null, 'en');
 
         $urlWithDefaultLocale = $projectUrlGenerator->generate('test');
-        $urlWithSpecifiedLocale = $projectUrlGenerator->generate('test', array('_locale' => 'nl'));
+        $urlWithSpecifiedLocale = $projectUrlGenerator->generate('test', ['_locale' => 'nl']);
         $context->setParameter('_locale', 'en');
         $urlWithEnglishContext = $projectUrlGenerator->generate('test');
         $context->setParameter('_locale', 'nl');
@@ -127,9 +127,9 @@ class PhpGeneratorDumperTest extends TestCase
     {
         $this->routeCollection->add('test.en', (new Route('/testing/is/fun'))->setDefault('_locale', 'en')->setDefault('_canonical_route', 'test'));
 
-        $code = $this->generatorDumper->dump(array(
+        $code = $this->generatorDumper->dump([
             'class' => 'RouteNotFoundLocalizedProjectUrlGenerator',
-        ));
+        ]);
         file_put_contents($this->testTmpFilepath, $code);
         include $this->testTmpFilepath;
 
@@ -143,9 +143,9 @@ class PhpGeneratorDumperTest extends TestCase
         $this->routeCollection->add('test.nl', (new Route('/testen/is/leuk'))->setDefault('_canonical_route', 'test'));
         $this->routeCollection->add('test.fr', (new Route('/tester/est/amusant'))->setDefault('_canonical_route', 'test'));
 
-        $code = $this->generatorDumper->dump(array(
+        $code = $this->generatorDumper->dump([
             'class' => 'FallbackLocaleLocalizedProjectUrlGenerator',
-        ));
+        ]);
         file_put_contents($this->testTmpFilepath, $code);
         include $this->testTmpFilepath;
 
@@ -156,7 +156,7 @@ class PhpGeneratorDumperTest extends TestCase
         // test with context _locale
         $this->assertEquals('/app.php/testing/is/fun', $projectUrlGenerator->generate('test'));
         // test with parameters _locale
-        $this->assertEquals('/app.php/testen/is/leuk', $projectUrlGenerator->generate('test', array('_locale' => 'nl_BE')));
+        $this->assertEquals('/app.php/testen/is/leuk', $projectUrlGenerator->generate('test', ['_locale' => 'nl_BE']));
 
         $projectUrlGenerator = new \FallbackLocaleLocalizedProjectUrlGenerator(new RequestContext('/app.php'), null, 'fr_CA');
         // test with default locale
@@ -171,18 +171,18 @@ class PhpGeneratorDumperTest extends TestCase
         }
         $this->routeCollection->add('Test2', new Route('/testing2'));
 
-        file_put_contents($this->largeTestTmpFilepath, $this->generatorDumper->dump(array(
+        file_put_contents($this->largeTestTmpFilepath, $this->generatorDumper->dump([
             'class' => 'ProjectLargeUrlGenerator',
-        )));
+        ]));
         $this->routeCollection = $this->generatorDumper = null;
         include $this->largeTestTmpFilepath;
 
         $projectUrlGenerator = new \ProjectLargeUrlGenerator(new RequestContext('/app.php'));
 
-        $absoluteUrlWithParameter = $projectUrlGenerator->generate('Test', array('foo' => 'bar'), UrlGeneratorInterface::ABSOLUTE_URL);
-        $absoluteUrlWithoutParameter = $projectUrlGenerator->generate('Test2', array(), UrlGeneratorInterface::ABSOLUTE_URL);
-        $relativeUrlWithParameter = $projectUrlGenerator->generate('Test', array('foo' => 'bar'), UrlGeneratorInterface::ABSOLUTE_PATH);
-        $relativeUrlWithoutParameter = $projectUrlGenerator->generate('Test2', array(), UrlGeneratorInterface::ABSOLUTE_PATH);
+        $absoluteUrlWithParameter = $projectUrlGenerator->generate('Test', ['foo' => 'bar'], UrlGeneratorInterface::ABSOLUTE_URL);
+        $absoluteUrlWithoutParameter = $projectUrlGenerator->generate('Test2', [], UrlGeneratorInterface::ABSOLUTE_URL);
+        $relativeUrlWithParameter = $projectUrlGenerator->generate('Test', ['foo' => 'bar'], UrlGeneratorInterface::ABSOLUTE_PATH);
+        $relativeUrlWithoutParameter = $projectUrlGenerator->generate('Test2', [], UrlGeneratorInterface::ABSOLUTE_PATH);
 
         $this->assertEquals('http://localhost/app.php/testing/bar', $absoluteUrlWithParameter);
         $this->assertEquals('http://localhost/app.php/testing2', $absoluteUrlWithoutParameter);
@@ -195,12 +195,12 @@ class PhpGeneratorDumperTest extends TestCase
      */
     public function testDumpWithoutRoutes()
     {
-        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(array('class' => 'WithoutRoutesUrlGenerator')));
+        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(['class' => 'WithoutRoutesUrlGenerator']));
         include $this->testTmpFilepath;
 
         $projectUrlGenerator = new \WithoutRoutesUrlGenerator(new RequestContext('/app.php'));
 
-        $projectUrlGenerator->generate('Test', array());
+        $projectUrlGenerator->generate('Test', []);
     }
 
     /**
@@ -210,45 +210,45 @@ class PhpGeneratorDumperTest extends TestCase
     {
         $this->routeCollection->add('Test', new Route('/test'));
 
-        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(array('class' => 'NonExistingRoutesUrlGenerator')));
+        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(['class' => 'NonExistingRoutesUrlGenerator']));
         include $this->testTmpFilepath;
 
         $projectUrlGenerator = new \NonExistingRoutesUrlGenerator(new RequestContext());
-        $url = $projectUrlGenerator->generate('NonExisting', array());
+        $url = $projectUrlGenerator->generate('NonExisting', []);
     }
 
     public function testDumpForRouteWithDefaults()
     {
-        $this->routeCollection->add('Test', new Route('/testing/{foo}', array('foo' => 'bar')));
+        $this->routeCollection->add('Test', new Route('/testing/{foo}', ['foo' => 'bar']));
 
-        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(array('class' => 'DefaultRoutesUrlGenerator')));
+        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(['class' => 'DefaultRoutesUrlGenerator']));
         include $this->testTmpFilepath;
 
         $projectUrlGenerator = new \DefaultRoutesUrlGenerator(new RequestContext());
-        $url = $projectUrlGenerator->generate('Test', array());
+        $url = $projectUrlGenerator->generate('Test', []);
 
         $this->assertEquals('/testing', $url);
     }
 
     public function testDumpWithSchemeRequirement()
     {
-        $this->routeCollection->add('Test1', new Route('/testing', array(), array(), array(), '', array('ftp', 'https')));
+        $this->routeCollection->add('Test1', new Route('/testing', [], [], [], '', ['ftp', 'https']));
 
-        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(array('class' => 'SchemeUrlGenerator')));
+        file_put_contents($this->testTmpFilepath, $this->generatorDumper->dump(['class' => 'SchemeUrlGenerator']));
         include $this->testTmpFilepath;
 
         $projectUrlGenerator = new \SchemeUrlGenerator(new RequestContext('/app.php'));
 
-        $absoluteUrl = $projectUrlGenerator->generate('Test1', array(), UrlGeneratorInterface::ABSOLUTE_URL);
-        $relativeUrl = $projectUrlGenerator->generate('Test1', array(), UrlGeneratorInterface::ABSOLUTE_PATH);
+        $absoluteUrl = $projectUrlGenerator->generate('Test1', [], UrlGeneratorInterface::ABSOLUTE_URL);
+        $relativeUrl = $projectUrlGenerator->generate('Test1', [], UrlGeneratorInterface::ABSOLUTE_PATH);
 
         $this->assertEquals('ftp://localhost/app.php/testing', $absoluteUrl);
         $this->assertEquals('ftp://localhost/app.php/testing', $relativeUrl);
 
         $projectUrlGenerator = new \SchemeUrlGenerator(new RequestContext('/app.php', 'GET', 'localhost', 'https'));
 
-        $absoluteUrl = $projectUrlGenerator->generate('Test1', array(), UrlGeneratorInterface::ABSOLUTE_URL);
-        $relativeUrl = $projectUrlGenerator->generate('Test1', array(), UrlGeneratorInterface::ABSOLUTE_PATH);
+        $absoluteUrl = $projectUrlGenerator->generate('Test1', [], UrlGeneratorInterface::ABSOLUTE_URL);
+        $relativeUrl = $projectUrlGenerator->generate('Test1', [], UrlGeneratorInterface::ABSOLUTE_PATH);
 
         $this->assertEquals('https://localhost/app.php/testing', $absoluteUrl);
         $this->assertEquals('/app.php/testing', $relativeUrl);
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
index e8bbe8fcf4..0ce4a47ec1 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AbstractAnnotationLoaderTest.php
@@ -26,7 +26,7 @@ abstract class AbstractAnnotationLoaderTest extends TestCase
     public function getClassLoader($reader)
     {
         return $this->getMockBuilder('Symfony\Component\Routing\Loader\AnnotationClassLoader')
-            ->setConstructorArgs(array($reader))
+            ->setConstructorArgs([$reader])
             ->getMockForAbstractClass()
         ;
     }
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
index cacce677f6..74dfcf8f49 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AnnotationClassLoaderTest.php
@@ -64,15 +64,15 @@ class AnnotationClassLoaderTest extends AbstractAnnotationLoaderTest
 
     public function provideTestSupportsChecksResource()
     {
-        return array(
-            array('class', true),
-            array('\fully\qualified\class\name', true),
-            array('namespaced\class\without\leading\slash', true),
-            array('ÿClassWithLegalSpecialCharacters', true),
-            array('5', false),
-            array('foo.foo', false),
-            array(null, false),
-        );
+        return [
+            ['class', true],
+            ['\fully\qualified\class\name', true],
+            ['namespaced\class\without\leading\slash', true],
+            ['ÿClassWithLegalSpecialCharacters', true],
+            ['5', false],
+            ['foo.foo', false],
+            [null, false],
+        ];
     }
 
     public function testSupportsChecksTypeIfSpecified()
@@ -105,8 +105,8 @@ class AnnotationClassLoaderTest extends AbstractAnnotationLoaderTest
         $routes = $this->loader->load(InvokableController::class);
         $this->assertCount(1, $routes);
         $this->assertEquals('/here', $routes->get('lol')->getPath());
-        $this->assertEquals(array('GET', 'POST'), $routes->get('lol')->getMethods());
-        $this->assertEquals(array('https'), $routes->get('lol')->getSchemes());
+        $this->assertEquals(['GET', 'POST'], $routes->get('lol')->getMethods());
+        $this->assertEquals(['https'], $routes->get('lol')->getSchemes());
     }
 
     public function testInvokableLocalizedControllerLoading()
@@ -185,30 +185,30 @@ class AnnotationClassLoaderTest extends AbstractAnnotationLoaderTest
 
     public function testInvokableClassMultipleRouteLoad()
     {
-        $classRouteData1 = array(
+        $classRouteData1 = [
             'name' => 'route1',
             'path' => '/1',
-            'schemes' => array('https'),
-            'methods' => array('GET'),
-        );
+            'schemes' => ['https'],
+            'methods' => ['GET'],
+        ];
 
-        $classRouteData2 = array(
+        $classRouteData2 = [
             'name' => 'route2',
             'path' => '/2',
-            'schemes' => array('https'),
-            'methods' => array('GET'),
-        );
+            'schemes' => ['https'],
+            'methods' => ['GET'],
+        ];
 
         $reader = $this->getReader();
         $reader
             ->expects($this->exactly(1))
             ->method('getClassAnnotations')
-            ->will($this->returnValue(array(new RouteAnnotation($classRouteData1), new RouteAnnotation($classRouteData2))))
+            ->will($this->returnValue([new RouteAnnotation($classRouteData1), new RouteAnnotation($classRouteData2)]))
         ;
         $reader
             ->expects($this->once())
             ->method('getMethodAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
         $loader = new class($reader) extends AnnotationClassLoader {
             protected function configureRoute(Route $route, \ReflectionClass $class, \ReflectionMethod $method, $annot)
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
index 901b858d91..ac25493481 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AnnotationDirectoryLoaderTest.php
@@ -34,13 +34,13 @@ class AnnotationDirectoryLoaderTest extends AbstractAnnotationLoaderTest
         $this->reader
             ->expects($this->any())
             ->method('getMethodAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $this->reader
             ->expects($this->any())
             ->method('getClassAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $this->loader->load(__DIR__.'/../Fixtures/AnnotatedClasses');
@@ -48,22 +48,22 @@ class AnnotationDirectoryLoaderTest extends AbstractAnnotationLoaderTest
 
     public function testLoadIgnoresHiddenDirectories()
     {
-        $this->expectAnnotationsToBeReadFrom(array(
+        $this->expectAnnotationsToBeReadFrom([
             'Symfony\Component\Routing\Tests\Fixtures\AnnotatedClasses\BarClass',
             'Symfony\Component\Routing\Tests\Fixtures\AnnotatedClasses\BazClass',
             'Symfony\Component\Routing\Tests\Fixtures\AnnotatedClasses\FooClass',
-        ));
+        ]);
 
         $this->reader
             ->expects($this->any())
             ->method('getMethodAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $this->reader
             ->expects($this->any())
             ->method('getClassAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $this->loader->load(__DIR__.'/../Fixtures/AnnotatedClasses');
@@ -92,7 +92,7 @@ class AnnotationDirectoryLoaderTest extends AbstractAnnotationLoaderTest
         $this->reader
             ->expects($this->any())
             ->method('getMethodAnnotations')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $this->loader->load(__DIR__.'/../Fixtures/AnnotatedClasses/FooClass.php');
diff --git a/src/Symfony/Component/Routing/Tests/Loader/AnnotationFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/AnnotationFileLoaderTest.php
index 50e212b3d7..85b3a4d49b 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/AnnotationFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/AnnotationFileLoaderTest.php
@@ -53,10 +53,10 @@ class AnnotationFileLoaderTest extends AbstractAnnotationLoaderTest
 
     public function testLoadVariadic()
     {
-        $route = new Route(array('path' => '/path/to/{id}'));
+        $route = new Route(['path' => '/path/to/{id}']);
         $this->reader->expects($this->once())->method('getClassAnnotation');
         $this->reader->expects($this->once())->method('getMethodAnnotations')
-            ->will($this->returnValue(array($route)));
+            ->will($this->returnValue([$route]));
 
         $this->loader->load(__DIR__.'/../Fixtures/OtherAnnotatedClasses/VariadicClass.php');
     }
diff --git a/src/Symfony/Component/Routing/Tests/Loader/DirectoryLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/DirectoryLoaderTest.php
index 45968551b2..2657751b38 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/DirectoryLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/DirectoryLoaderTest.php
@@ -30,11 +30,11 @@ class DirectoryLoaderTest extends AbstractAnnotationLoaderTest
         $locator = new FileLocator();
         $this->reader = $this->getReader();
         $this->loader = new DirectoryLoader($locator);
-        $resolver = new LoaderResolver(array(
+        $resolver = new LoaderResolver([
             new YamlFileLoader($locator),
             new AnnotationFileLoader($locator, $this->getClassLoader($this->reader)),
             $this->loader,
-        ));
+        ]);
         $this->loader->setResolver($resolver);
     }
 
diff --git a/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
index ed6506829f..0e9289bee4 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/ObjectRouteLoaderTest.php
@@ -30,9 +30,9 @@ class ObjectRouteLoaderTest extends TestCase
         $collection = new RouteCollection();
         $collection->add('foo', new Route('/foo'));
 
-        $loader->loaderMap = array(
+        $loader->loaderMap = [
             'my_route_provider_service' => new RouteService($collection),
-        );
+        ];
 
         $actualRoutes = $loader->load(
             'my_route_provider_service:loadRoutes',
@@ -52,9 +52,9 @@ class ObjectRouteLoaderTest extends TestCase
         $collection = new RouteCollection();
         $collection->add('foo', new Route('/foo'));
 
-        $loader->loaderMap = array(
+        $loader->loaderMap = [
             'my_route_provider_service' => new RouteService($collection),
-        );
+        ];
 
         $actualRoutes = $loader->load(
             'my_route_provider_service::loadRoutes',
@@ -78,10 +78,10 @@ class ObjectRouteLoaderTest extends TestCase
 
     public function getBadResourceStrings()
     {
-        return array(
-            array('Foo'),
-            array('Foo:Bar:baz'),
-        );
+        return [
+            ['Foo'],
+            ['Foo:Bar:baz'],
+        ];
     }
 
     /**
@@ -90,7 +90,7 @@ class ObjectRouteLoaderTest extends TestCase
     public function testExceptionOnNoObjectReturned()
     {
         $loader = new ObjectRouteLoaderForTest();
-        $loader->loaderMap = array('my_service' => 'NOT_AN_OBJECT');
+        $loader->loaderMap = ['my_service' => 'NOT_AN_OBJECT'];
         $loader->load('my_service::method');
     }
 
@@ -100,7 +100,7 @@ class ObjectRouteLoaderTest extends TestCase
     public function testExceptionOnBadMethod()
     {
         $loader = new ObjectRouteLoaderForTest();
-        $loader->loaderMap = array('my_service' => new \stdClass());
+        $loader->loaderMap = ['my_service' => new \stdClass()];
         $loader->load('my_service::method');
     }
 
@@ -110,21 +110,21 @@ class ObjectRouteLoaderTest extends TestCase
     public function testExceptionOnMethodNotReturningCollection()
     {
         $service = $this->getMockBuilder('stdClass')
-            ->setMethods(array('loadRoutes'))
+            ->setMethods(['loadRoutes'])
             ->getMock();
         $service->expects($this->once())
             ->method('loadRoutes')
             ->will($this->returnValue('NOT_A_COLLECTION'));
 
         $loader = new ObjectRouteLoaderForTest();
-        $loader->loaderMap = array('my_service' => $service);
+        $loader->loaderMap = ['my_service' => $service];
         $loader->load('my_service::loadRoutes');
     }
 }
 
 class ObjectRouteLoaderForTest extends ObjectRouteLoader
 {
-    public $loaderMap = array();
+    public $loaderMap = [];
 
     protected function getServiceObject($id)
     {
diff --git a/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
index a148e9ee3f..fcde870373 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/PhpFileLoaderTest.php
@@ -33,7 +33,7 @@ class PhpFileLoaderTest extends TestCase
 
     public function testLoadWithRoute()
     {
-        $loader = new PhpFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new PhpFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validpattern.php');
         $routes = $routeCollection->all();
 
@@ -45,14 +45,14 @@ class PhpFileLoaderTest extends TestCase
             $this->assertSame('MyBlogBundle:Blog:show', $route->getDefault('_controller'));
             $this->assertSame('{locale}.example.com', $route->getHost());
             $this->assertSame('RouteCompiler', $route->getOption('compiler_class'));
-            $this->assertEquals(array('GET', 'POST', 'PUT', 'OPTIONS'), $route->getMethods());
-            $this->assertEquals(array('https'), $route->getSchemes());
+            $this->assertEquals(['GET', 'POST', 'PUT', 'OPTIONS'], $route->getMethods());
+            $this->assertEquals(['https'], $route->getSchemes());
         }
     }
 
     public function testLoadWithImport()
     {
-        $loader = new PhpFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new PhpFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validresource.php');
         $routes = $routeCollection->all();
 
@@ -64,14 +64,14 @@ class PhpFileLoaderTest extends TestCase
             $this->assertSame('MyBlogBundle:Blog:show', $route->getDefault('_controller'));
             $this->assertSame('{locale}.example.com', $route->getHost());
             $this->assertSame('RouteCompiler', $route->getOption('compiler_class'));
-            $this->assertEquals(array('GET', 'POST', 'PUT', 'OPTIONS'), $route->getMethods());
-            $this->assertEquals(array('https'), $route->getSchemes());
+            $this->assertEquals(['GET', 'POST', 'PUT', 'OPTIONS'], $route->getMethods());
+            $this->assertEquals(['https'], $route->getSchemes());
         }
     }
 
     public function testThatDefiningVariableInConfigFileHasNoSideEffects()
     {
-        $locator = new FileLocator(array(__DIR__.'/../Fixtures'));
+        $locator = new FileLocator([__DIR__.'/../Fixtures']);
         $loader = new PhpFileLoader($locator);
         $routeCollection = $loader->load('with_define_path_variable.php');
         $resources = $routeCollection->getResources();
@@ -86,7 +86,7 @@ class PhpFileLoaderTest extends TestCase
 
     public function testRoutingConfigurator()
     {
-        $locator = new FileLocator(array(__DIR__.'/../Fixtures'));
+        $locator = new FileLocator([__DIR__.'/../Fixtures']);
         $loader = new PhpFileLoader($locator);
         $routeCollectionClosure = $loader->load('php_dsl.php');
         $routeCollectionObject = $loader->load('php_object_dsl.php');
@@ -94,21 +94,21 @@ class PhpFileLoaderTest extends TestCase
         $expectedCollection = new RouteCollection();
 
         $expectedCollection->add('foo', (new Route('/foo'))
-            ->setOptions(array('utf8' => true))
+            ->setOptions(['utf8' => true])
             ->setCondition('abc')
         );
         $expectedCollection->add('buz', (new Route('/zub'))
-            ->setDefaults(array('_controller' => 'foo:act'))
+            ->setDefaults(['_controller' => 'foo:act'])
         );
         $expectedCollection->add('c_root', (new Route('/sub/pub/'))
-            ->setRequirements(array('id' => '\d+'))
+            ->setRequirements(['id' => '\d+'])
         );
         $expectedCollection->add('c_bar', (new Route('/sub/pub/bar'))
-            ->setRequirements(array('id' => '\d+'))
+            ->setRequirements(['id' => '\d+'])
         );
         $expectedCollection->add('c_pub_buz', (new Route('/sub/pub/buz'))
             ->setHost('host')
-            ->setRequirements(array('id' => '\d+'))
+            ->setRequirements(['id' => '\d+'])
         );
         $expectedCollection->add('z_c_root', new Route('/zub/pub/'));
         $expectedCollection->add('z_c_bar', new Route('/zub/pub/bar'));
@@ -116,9 +116,9 @@ class PhpFileLoaderTest extends TestCase
         $expectedCollection->add('r_root', new Route('/bus'));
         $expectedCollection->add('r_bar', new Route('/bus/bar/'));
         $expectedCollection->add('ouf', (new Route('/ouf'))
-            ->setSchemes(array('https'))
-            ->setMethods(array('GET'))
-            ->setDefaults(array('id' => 0))
+            ->setSchemes(['https'])
+            ->setMethods(['GET'])
+            ->setDefaults(['id' => 0])
         );
 
         $expectedCollection->addResource(new FileResource(realpath(__DIR__.'/../Fixtures/php_dsl_sub.php')));
@@ -136,7 +136,7 @@ class PhpFileLoaderTest extends TestCase
 
     public function testRoutingConfiguratorCanImportGlobPatterns()
     {
-        $locator = new FileLocator(array(__DIR__.'/../Fixtures/glob'));
+        $locator = new FileLocator([__DIR__.'/../Fixtures/glob']);
         $loader = new PhpFileLoader($locator);
         $routeCollection = $loader->load('php_dsl.php');
 
@@ -149,17 +149,17 @@ class PhpFileLoaderTest extends TestCase
 
     public function testRoutingI18nConfigurator()
     {
-        $locator = new FileLocator(array(__DIR__.'/../Fixtures'));
+        $locator = new FileLocator([__DIR__.'/../Fixtures']);
         $loader = new PhpFileLoader($locator);
         $routeCollection = $loader->load('php_dsl_i18n.php');
 
         $expectedCollection = new RouteCollection();
 
-        $expectedCollection->add('foo.en', (new Route('/glish/foo'))->setDefaults(array('_locale' => 'en', '_canonical_route' => 'foo')));
-        $expectedCollection->add('bar.en', (new Route('/glish/bar'))->setDefaults(array('_locale' => 'en', '_canonical_route' => 'bar')));
-        $expectedCollection->add('baz.en', (new Route('/baz'))->setDefaults(array('_locale' => 'en', '_canonical_route' => 'baz')));
-        $expectedCollection->add('c_foo.fr', (new Route('/ench/pub/foo'))->setDefaults(array('_locale' => 'fr', '_canonical_route' => 'c_foo')));
-        $expectedCollection->add('c_bar.fr', (new Route('/ench/pub/bar'))->setDefaults(array('_locale' => 'fr', '_canonical_route' => 'c_bar')));
+        $expectedCollection->add('foo.en', (new Route('/glish/foo'))->setDefaults(['_locale' => 'en', '_canonical_route' => 'foo']));
+        $expectedCollection->add('bar.en', (new Route('/glish/bar'))->setDefaults(['_locale' => 'en', '_canonical_route' => 'bar']));
+        $expectedCollection->add('baz.en', (new Route('/baz'))->setDefaults(['_locale' => 'en', '_canonical_route' => 'baz']));
+        $expectedCollection->add('c_foo.fr', (new Route('/ench/pub/foo'))->setDefaults(['_locale' => 'fr', '_canonical_route' => 'c_foo']));
+        $expectedCollection->add('c_bar.fr', (new Route('/ench/pub/bar'))->setDefaults(['_locale' => 'fr', '_canonical_route' => 'c_bar']));
 
         $expectedCollection->addResource(new FileResource(realpath(__DIR__.'/../Fixtures/php_dsl_sub_i18n.php')));
         $expectedCollection->addResource(new FileResource(realpath(__DIR__.'/../Fixtures/php_dsl_i18n.php')));
diff --git a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
index fff4154b17..f40b155d78 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
@@ -31,7 +31,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLoadWithRoute()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validpattern.xml');
         $route = $routeCollection->get('blog_show');
 
@@ -41,14 +41,14 @@ class XmlFileLoaderTest extends TestCase
         $this->assertSame('MyBundle:Blog:show', $route->getDefault('_controller'));
         $this->assertSame('\w+', $route->getRequirement('locale'));
         $this->assertSame('RouteCompiler', $route->getOption('compiler_class'));
-        $this->assertEquals(array('GET', 'POST', 'PUT', 'OPTIONS'), $route->getMethods());
-        $this->assertEquals(array('https'), $route->getSchemes());
+        $this->assertEquals(['GET', 'POST', 'PUT', 'OPTIONS'], $route->getMethods());
+        $this->assertEquals(['https'], $route->getSchemes());
         $this->assertEquals('context.getMethod() == "GET"', $route->getCondition());
     }
 
     public function testLoadWithNamespacePrefix()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('namespaceprefix.xml');
 
         $this->assertCount(1, $routeCollection->all(), 'One route is loaded');
@@ -66,7 +66,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLoadWithImport()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validresource.xml');
         $routes = $routeCollection->all();
 
@@ -85,7 +85,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLoadLocalized()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('localized.xml');
         $routes = $routeCollection->all();
 
@@ -98,7 +98,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLocalizedImports()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routeCollection = $loader->load('importer-with-locale.xml');
         $routes = $routeCollection->all();
 
@@ -111,7 +111,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLocalizedImportsOfNotLocalizedRoutes()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routeCollection = $loader->load('importer-with-locale-imports-non-localized-route.xml');
         $routes = $routeCollection->all();
 
@@ -128,7 +128,7 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testLoadThrowsExceptionWithInvalidFile($filePath)
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $loader->load($filePath);
     }
 
@@ -138,13 +138,13 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testLoadThrowsExceptionWithInvalidFileEvenWithoutSchemaValidation($filePath)
     {
-        $loader = new CustomXmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new CustomXmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $loader->load($filePath);
     }
 
     public function getPathsToInvalidFiles()
     {
-        return array(array('nonvalidnode.xml'), array('nonvalidroute.xml'), array('nonvalid.xml'), array('missing_id.xml'), array('missing_path.xml'));
+        return [['nonvalidnode.xml'], ['nonvalidroute.xml'], ['nonvalid.xml'], ['missing_id.xml'], ['missing_path.xml']];
     }
 
     /**
@@ -153,13 +153,13 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testDocTypeIsNotAllowed()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $loader->load('withdoctype.xml');
     }
 
     public function testNullValues()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('null_values.xml');
         $route = $routeCollection->get('blog_show');
 
@@ -173,12 +173,12 @@ class XmlFileLoaderTest extends TestCase
 
     public function testScalarDataTypeDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('scalar_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
                 'slug' => null,
                 'published' => true,
@@ -189,147 +189,147 @@ class XmlFileLoaderTest extends TestCase
                 'locked' => false,
                 'foo' => null,
                 'bar' => null,
-            ),
+            ],
             $route->getDefaults()
         );
     }
 
     public function testListDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('list_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array(true, 1, 3.5, 'foo'),
-            ),
+                'values' => [true, 1, 3.5, 'foo'],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testListInListDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('list_in_list_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array(array(true, 1, 3.5, 'foo')),
-            ),
+                'values' => [[true, 1, 3.5, 'foo']],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testListInMapDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('list_in_map_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array('list' => array(true, 1, 3.5, 'foo')),
-            ),
+                'values' => ['list' => [true, 1, 3.5, 'foo']],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testMapDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('map_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array(
+                'values' => [
                     'public' => true,
                     'page' => 1,
                     'price' => 3.5,
                     'title' => 'foo',
-                ),
-            ),
+                ],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testMapInListDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('map_in_list_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array(array(
+                'values' => [[
                     'public' => true,
                     'page' => 1,
                     'price' => 3.5,
                     'title' => 'foo',
-                )),
-            ),
+                ]],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testMapInMapDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('map_in_map_defaults.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 '_controller' => 'AcmeBlogBundle:Blog:index',
-                'values' => array('map' => array(
+                'values' => ['map' => [
                     'public' => true,
                     'page' => 1,
                     'price' => 3.5,
                     'title' => 'foo',
-                )),
-            ),
+                ]],
+            ],
             $route->getDefaults()
         );
     }
 
     public function testNullValuesInList()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('list_null_values.xml');
         $route = $routeCollection->get('blog');
 
-        $this->assertSame(array(null, null, null, null, null, null), $route->getDefault('list'));
+        $this->assertSame([null, null, null, null, null, null], $route->getDefault('list'));
     }
 
     public function testNullValuesInMap()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('map_null_values.xml');
         $route = $routeCollection->get('blog');
 
         $this->assertSame(
-            array(
+            [
                 'boolean' => null,
                 'integer' => null,
                 'float' => null,
                 'string' => null,
                 'list' => null,
                 'map' => null,
-            ),
+            ],
             $route->getDefault('map')
         );
     }
 
     public function testLoadRouteWithControllerAttribute()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.xml');
 
         $route = $routeCollection->get('app_homepage');
@@ -339,7 +339,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLoadRouteWithoutControllerAttribute()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.xml');
 
         $route = $routeCollection->get('app_logout');
@@ -349,7 +349,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testLoadRouteWithControllerSetInDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.xml');
 
         $route = $routeCollection->get('app_blog');
@@ -363,7 +363,7 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testOverrideControllerInDefaults()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $loader->load('override_defaults.xml');
     }
 
@@ -372,7 +372,7 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testImportRouteWithController($file)
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load($file);
 
         $route = $routeCollection->get('app_homepage');
@@ -387,8 +387,8 @@ class XmlFileLoaderTest extends TestCase
 
     public function provideFilesImportingRoutesWithControllers()
     {
-        yield array('import_controller.xml');
-        yield array('import__controller.xml');
+        yield ['import_controller.xml'];
+        yield ['import__controller.xml'];
     }
 
     /**
@@ -397,13 +397,13 @@ class XmlFileLoaderTest extends TestCase
      */
     public function testImportWithOverriddenController()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $loader->load('import_override_defaults.xml');
     }
 
     public function testImportRouteWithGlobMatchingSingleFile()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/glob')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/glob']));
         $routeCollection = $loader->load('import_single.xml');
 
         $route = $routeCollection->get('bar_route');
@@ -412,7 +412,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testImportRouteWithGlobMatchingMultipleFiles()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/glob')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/glob']));
         $routeCollection = $loader->load('import_multiple.xml');
 
         $route = $routeCollection->get('bar_route');
@@ -424,7 +424,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testImportRouteWithNamePrefix()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/import_with_name_prefix')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/import_with_name_prefix']));
         $routeCollection = $loader->load('routing.xml');
 
         $this->assertNotNull($routeCollection->get('app_blog'));
@@ -435,7 +435,7 @@ class XmlFileLoaderTest extends TestCase
 
     public function testImportRouteWithNoTrailingSlash()
     {
-        $loader = new XmlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/import_with_no_trailing_slash')));
+        $loader = new XmlFileLoader(new FileLocator([__DIR__.'/../Fixtures/import_with_no_trailing_slash']));
         $routeCollection = $loader->load('routing.xml');
 
         $this->assertEquals('/slash/', $routeCollection->get('a_app_homepage')->getPath());
diff --git a/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
index 26a72e3336..296bbe4226 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/YamlFileLoaderTest.php
@@ -33,11 +33,11 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadDoesNothingIfEmpty()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $collection = $loader->load('empty.yml');
 
-        $this->assertEquals(array(), $collection->all());
-        $this->assertEquals(array(new FileResource(realpath(__DIR__.'/../Fixtures/empty.yml'))), $collection->getResources());
+        $this->assertEquals([], $collection->all());
+        $this->assertEquals([new FileResource(realpath(__DIR__.'/../Fixtures/empty.yml'))], $collection->getResources());
     }
 
     /**
@@ -46,26 +46,26 @@ class YamlFileLoaderTest extends TestCase
      */
     public function testLoadThrowsExceptionWithInvalidFile($filePath)
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $loader->load($filePath);
     }
 
     public function getPathsToInvalidFiles()
     {
-        return array(
-            array('nonvalid.yml'),
-            array('nonvalid2.yml'),
-            array('incomplete.yml'),
-            array('nonvalidkeys.yml'),
-            array('nonesense_resource_plus_path.yml'),
-            array('nonesense_type_without_resource.yml'),
-            array('bad_format.yml'),
-        );
+        return [
+            ['nonvalid.yml'],
+            ['nonvalid2.yml'],
+            ['incomplete.yml'],
+            ['nonvalidkeys.yml'],
+            ['nonesense_resource_plus_path.yml'],
+            ['nonesense_type_without_resource.yml'],
+            ['bad_format.yml'],
+        ];
     }
 
     public function testLoadSpecialRouteName()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('special_route_name.yml');
         $route = $routeCollection->get('#$péß^a|');
 
@@ -75,7 +75,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadWithRoute()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validpattern.yml');
         $route = $routeCollection->get('blog_show');
 
@@ -85,14 +85,14 @@ class YamlFileLoaderTest extends TestCase
         $this->assertSame('MyBundle:Blog:show', $route->getDefault('_controller'));
         $this->assertSame('\w+', $route->getRequirement('locale'));
         $this->assertSame('RouteCompiler', $route->getOption('compiler_class'));
-        $this->assertEquals(array('GET', 'POST', 'PUT', 'OPTIONS'), $route->getMethods());
-        $this->assertEquals(array('https'), $route->getSchemes());
+        $this->assertEquals(['GET', 'POST', 'PUT', 'OPTIONS'], $route->getMethods());
+        $this->assertEquals(['https'], $route->getSchemes());
         $this->assertEquals('context.getMethod() == "GET"', $route->getCondition());
     }
 
     public function testLoadWithResource()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $routeCollection = $loader->load('validresource.yml');
         $routes = $routeCollection->all();
 
@@ -111,7 +111,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadRouteWithControllerAttribute()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.yml');
 
         $route = $routeCollection->get('app_homepage');
@@ -121,7 +121,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadRouteWithoutControllerAttribute()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.yml');
 
         $route = $routeCollection->get('app_logout');
@@ -131,7 +131,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadRouteWithControllerSetInDefaults()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load('routing.yml');
 
         $route = $routeCollection->get('app_blog');
@@ -145,7 +145,7 @@ class YamlFileLoaderTest extends TestCase
      */
     public function testOverrideControllerInDefaults()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $loader->load('override_defaults.yml');
     }
 
@@ -154,7 +154,7 @@ class YamlFileLoaderTest extends TestCase
      */
     public function testImportRouteWithController($file)
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $routeCollection = $loader->load($file);
 
         $route = $routeCollection->get('app_homepage');
@@ -169,8 +169,8 @@ class YamlFileLoaderTest extends TestCase
 
     public function provideFilesImportingRoutesWithControllers()
     {
-        yield array('import_controller.yml');
-        yield array('import__controller.yml');
+        yield ['import_controller.yml'];
+        yield ['import__controller.yml'];
     }
 
     /**
@@ -179,13 +179,13 @@ class YamlFileLoaderTest extends TestCase
      */
     public function testImportWithOverriddenController()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/controller')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/controller']));
         $loader->load('import_override_defaults.yml');
     }
 
     public function testImportRouteWithGlobMatchingSingleFile()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/glob')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/glob']));
         $routeCollection = $loader->load('import_single.yml');
 
         $route = $routeCollection->get('bar_route');
@@ -194,7 +194,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportRouteWithGlobMatchingMultipleFiles()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/glob')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/glob']));
         $routeCollection = $loader->load('import_multiple.yml');
 
         $route = $routeCollection->get('bar_route');
@@ -206,7 +206,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportRouteWithNamePrefix()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/import_with_name_prefix')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/import_with_name_prefix']));
         $routeCollection = $loader->load('routing.yml');
 
         $this->assertNotNull($routeCollection->get('app_blog'));
@@ -224,7 +224,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testLoadingLocalizedRoute()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('localized-route.yml');
 
         $this->assertCount(3, $routes);
@@ -232,7 +232,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportingRoutesFromDefinition()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('importing-localized-route.yml');
 
         $this->assertCount(3, $routes);
@@ -243,7 +243,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportingRoutesWithLocales()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('importer-with-locale.yml');
 
         $this->assertCount(2, $routes);
@@ -253,7 +253,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportingNonLocalizedRoutesWithLocales()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('importer-with-locale-imports-non-localized-route.yml');
 
         $this->assertCount(2, $routes);
@@ -263,7 +263,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportingRoutesWithOfficialLocales()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('officially_formatted_locales.yml');
 
         $this->assertCount(3, $routes);
@@ -274,21 +274,21 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportingRoutesFromDefinitionMissingLocalePrefix()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $this->expectException(\InvalidArgumentException::class);
         $loader->load('missing-locale-in-importer.yml');
     }
 
     public function testImportingRouteWithoutPathOrLocales()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $this->expectException(\InvalidArgumentException::class);
         $loader->load('route-without-path-or-locales.yml');
     }
 
     public function testImportingWithControllerDefault()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/localized')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/localized']));
         $routes = $loader->load('importer-with-controller-default.yml');
         $this->assertCount(3, $routes);
         $this->assertEquals('DefaultController::defaultAction', $routes->get('home.en')->getDefault('_controller'));
@@ -298,7 +298,7 @@ class YamlFileLoaderTest extends TestCase
 
     public function testImportRouteWithNoTrailingSlash()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures/import_with_no_trailing_slash')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures/import_with_no_trailing_slash']));
         $routeCollection = $loader->load('routing.yml');
 
         $this->assertEquals('/slash/', $routeCollection->get('a_app_homepage')->getPath());
@@ -311,7 +311,7 @@ class YamlFileLoaderTest extends TestCase
      */
     public function testRequirementsWithoutPlaceholderName()
     {
-        $loader = new YamlFileLoader(new FileLocator(array(__DIR__.'/../Fixtures')));
+        $loader = new YamlFileLoader(new FileLocator([__DIR__.'/../Fixtures']));
         $loader->load('requirements_without_placeholder_name.yml');
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/DumpedRedirectableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/DumpedRedirectableUrlMatcherTest.php
index 1785c3ad20..235e47768f 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/DumpedRedirectableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/DumpedRedirectableUrlMatcherTest.php
@@ -25,11 +25,11 @@ class DumpedRedirectableUrlMatcherTest extends RedirectableUrlMatcherTest
 
         $class = 'DumpedRedirectableUrlMatcher'.++$i;
         $dumper = new PhpMatcherDumper($routes);
-        eval('?>'.$dumper->dump(array('class' => $class, 'base_class' => 'Symfony\Component\Routing\Tests\Matcher\TestDumpedRedirectableUrlMatcher')));
+        eval('?>'.$dumper->dump(['class' => $class, 'base_class' => 'Symfony\Component\Routing\Tests\Matcher\TestDumpedRedirectableUrlMatcher']));
 
         return $this->getMockBuilder($class)
-            ->setConstructorArgs(array($context ?: new RequestContext()))
-            ->setMethods(array('redirect'))
+            ->setConstructorArgs([$context ?: new RequestContext()])
+            ->setMethods(['redirect'])
             ->getMock();
     }
 }
@@ -38,6 +38,6 @@ class TestDumpedRedirectableUrlMatcher extends UrlMatcher implements Redirectabl
 {
     public function redirect($path, $route, $scheme = null)
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/DumpedUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/DumpedUrlMatcherTest.php
index 47e3251678..dcf2185888 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/DumpedUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/DumpedUrlMatcherTest.php
@@ -23,7 +23,7 @@ class DumpedUrlMatcherTest extends UrlMatcherTest
 
         $class = 'DumpedUrlMatcher'.++$i;
         $dumper = new PhpMatcherDumper($routes);
-        eval('?>'.$dumper->dump(array('class' => $class)));
+        eval('?>'.$dumper->dump(['class' => $class]));
 
         return new $class($context ?: new RequestContext());
     }
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
index a5cb043517..a85ac67ae2 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/PhpMatcherDumperTest.php
@@ -54,11 +54,11 @@ class PhpMatcherDumperTest extends TestCase
         $class = $this->generateDumpedMatcher($collection, true);
 
         $matcher = $this->getMockBuilder($class)
-                        ->setMethods(array('redirect'))
-                        ->setConstructorArgs(array(new RequestContext()))
+                        ->setMethods(['redirect'])
+                        ->setConstructorArgs([new RequestContext()])
                         ->getMock();
 
-        $matcher->expects($this->once())->method('redirect')->with('/foo%3Abar/', 'foo')->willReturn(array());
+        $matcher->expects($this->once())->method('redirect')->with('/foo%3Abar/', 'foo')->willReturn([]);
 
         $matcher->match('/foo%3Abar');
     }
@@ -66,7 +66,7 @@ class PhpMatcherDumperTest extends TestCase
     /**
      * @dataProvider getRouteCollections
      */
-    public function testDump(RouteCollection $collection, $fixture, $options = array())
+    public function testDump(RouteCollection $collection, $fixture, $options = [])
     {
         $basePath = __DIR__.'/../../Fixtures/dumper/';
 
@@ -85,28 +85,28 @@ class PhpMatcherDumperTest extends TestCase
         // defaults and requirements
         $collection->add('foo', new Route(
             '/foo/{bar}',
-            array('def' => 'test'),
-            array('bar' => 'baz|symfony')
+            ['def' => 'test'],
+            ['bar' => 'baz|symfony']
         ));
         // method requirement
         $collection->add('bar', new Route(
             '/bar/{foo}',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('GET', 'head')
+            [],
+            ['GET', 'head']
         ));
         // GET method requirement automatically adds HEAD as valid
         $collection->add('barhead', new Route(
             '/barhead/{foo}',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('GET')
+            [],
+            ['GET']
         ));
         // simple
         $collection->add('baz', new Route(
@@ -127,33 +127,33 @@ class PhpMatcherDumperTest extends TestCase
         // trailing slash and method
         $collection->add('baz5', new Route(
             '/test/{foo}/',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('post')
+            [],
+            ['post']
         ));
         // complex name
         $collection->add('baz.baz6', new Route(
             '/test/{foo}/',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('put')
+            [],
+            ['put']
         ));
         // defaults without variable
         $collection->add('foofoo', new Route(
             '/foofoo',
-            array('def' => 'test')
+            ['def' => 'test']
         ));
         // pattern with quotes
         $collection->add('quoter', new Route(
             '/{quoter}',
-            array(),
-            array('quoter' => '[\']+')
+            [],
+            ['quoter' => '[\']+']
         ));
         // space in pattern
         $collection->add('space', new Route(
@@ -168,7 +168,7 @@ class PhpMatcherDumperTest extends TestCase
         $collection1->addPrefix('/b\'b');
         $collection2 = new RouteCollection();
         $collection2->addCollection($collection1);
-        $collection2->add('overridden', new Route('/{var}', array(), array('var' => '.*')));
+        $collection2->add('overridden', new Route('/{var}', [], ['var' => '.*']));
         $collection1 = new RouteCollection();
         $collection1->add('foo2', new Route('/{foo1}'));
         $collection1->add('bar2', new Route('/{bar1}'));
@@ -180,7 +180,7 @@ class PhpMatcherDumperTest extends TestCase
         // overridden through addCollection() and multiple sub-collections with no own prefix
         $collection1 = new RouteCollection();
         $collection1->add('overridden2', new Route('/old'));
-        $collection1->add('helloWorld', new Route('/hello/{who}', array('who' => 'World!')));
+        $collection1->add('helloWorld', new Route('/hello/{who}', ['who' => 'World!']));
         $collection2 = new RouteCollection();
         $collection3 = new RouteCollection();
         $collection3->add('overridden2', new Route('/new'));
@@ -211,22 +211,22 @@ class PhpMatcherDumperTest extends TestCase
 
         $collection1 = new RouteCollection();
 
-        $route1 = new Route('/route1', array(), array(), array(), 'a.example.com');
+        $route1 = new Route('/route1', [], [], [], 'a.example.com');
         $collection1->add('route1', $route1);
 
-        $route2 = new Route('/c2/route2', array(), array(), array(), 'a.example.com');
+        $route2 = new Route('/c2/route2', [], [], [], 'a.example.com');
         $collection1->add('route2', $route2);
 
-        $route3 = new Route('/c2/route3', array(), array(), array(), 'b.example.com');
+        $route3 = new Route('/c2/route3', [], [], [], 'b.example.com');
         $collection1->add('route3', $route3);
 
-        $route4 = new Route('/route4', array(), array(), array(), 'a.example.com');
+        $route4 = new Route('/route4', [], [], [], 'a.example.com');
         $collection1->add('route4', $route4);
 
-        $route5 = new Route('/route5', array(), array(), array(), 'c.example.com');
+        $route5 = new Route('/route5', [], [], [], 'c.example.com');
         $collection1->add('route5', $route5);
 
-        $route6 = new Route('/route6', array(), array(), array(), null);
+        $route6 = new Route('/route6', [], [], [], null);
         $collection1->add('route6', $route6);
 
         $collection->addCollection($collection1);
@@ -235,25 +235,25 @@ class PhpMatcherDumperTest extends TestCase
 
         $collection1 = new RouteCollection();
 
-        $route11 = new Route('/route11', array(), array(), array(), '{var1}.example.com');
+        $route11 = new Route('/route11', [], [], [], '{var1}.example.com');
         $collection1->add('route11', $route11);
 
-        $route12 = new Route('/route12', array('var1' => 'val'), array(), array(), '{var1}.example.com');
+        $route12 = new Route('/route12', ['var1' => 'val'], [], [], '{var1}.example.com');
         $collection1->add('route12', $route12);
 
-        $route13 = new Route('/route13/{name}', array(), array(), array(), '{var1}.example.com');
+        $route13 = new Route('/route13/{name}', [], [], [], '{var1}.example.com');
         $collection1->add('route13', $route13);
 
-        $route14 = new Route('/route14/{name}', array('var1' => 'val'), array(), array(), '{var1}.example.com');
+        $route14 = new Route('/route14/{name}', ['var1' => 'val'], [], [], '{var1}.example.com');
         $collection1->add('route14', $route14);
 
-        $route15 = new Route('/route15/{name}', array(), array(), array(), 'c.example.com');
+        $route15 = new Route('/route15/{name}', [], [], [], 'c.example.com');
         $collection1->add('route15', $route15);
 
-        $route16 = new Route('/route16/{name}', array('var1' => 'val'), array(), array(), null);
+        $route16 = new Route('/route16/{name}', ['var1' => 'val'], [], [], null);
         $collection1->add('route16', $route16);
 
-        $route17 = new Route('/route17', array(), array(), array(), null);
+        $route17 = new Route('/route17', [], [], [], null);
         $collection1->add('route17', $route17);
 
         $collection->addCollection($collection1);
@@ -279,21 +279,21 @@ class PhpMatcherDumperTest extends TestCase
         // force HTTPS redirection
         $redirectCollection->add('secure', new Route(
             '/secure',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array('https')
+            ['https']
         ));
 
         // force HTTP redirection
         $redirectCollection->add('nonsecure', new Route(
             '/nonsecure',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array('http')
+            ['http']
         ));
 
         /* test case 3 */
@@ -310,57 +310,57 @@ class PhpMatcherDumperTest extends TestCase
         $headMatchCasesCollection = new RouteCollection();
         $headMatchCasesCollection->add('just_head', new Route(
             '/just_head',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('HEAD')
+            [],
+            ['HEAD']
         ));
         $headMatchCasesCollection->add('head_and_get', new Route(
             '/head_and_get',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('HEAD', 'GET')
+            [],
+            ['HEAD', 'GET']
         ));
         $headMatchCasesCollection->add('get_and_head', new Route(
             '/get_and_head',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('GET', 'HEAD')
+            [],
+            ['GET', 'HEAD']
         ));
         $headMatchCasesCollection->add('post_and_head', new Route(
             '/post_and_head',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('POST', 'HEAD')
+            [],
+            ['POST', 'HEAD']
         ));
         $headMatchCasesCollection->add('put_and_post', new Route(
             '/put_and_post',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('PUT', 'POST')
+            [],
+            ['PUT', 'POST']
         ));
         $headMatchCasesCollection->add('put_and_get_and_head', new Route(
             '/put_and_post',
-            array(),
-            array(),
-            array(),
+            [],
+            [],
+            [],
             '',
-            array(),
-            array('PUT', 'GET', 'HEAD')
+            [],
+            ['PUT', 'GET', 'HEAD']
         ));
 
         /* test case 5 */
@@ -383,29 +383,29 @@ class PhpMatcherDumperTest extends TestCase
 
         /* test case 6 & 7 */
         $trailingSlashCollection = new RouteCollection();
-        $trailingSlashCollection->add('simple_trailing_slash_no_methods', new Route('/trailing/simple/no-methods/', array(), array(), array(), '', array(), array()));
-        $trailingSlashCollection->add('simple_trailing_slash_GET_method', new Route('/trailing/simple/get-method/', array(), array(), array(), '', array(), array('GET')));
-        $trailingSlashCollection->add('simple_trailing_slash_HEAD_method', new Route('/trailing/simple/head-method/', array(), array(), array(), '', array(), array('HEAD')));
-        $trailingSlashCollection->add('simple_trailing_slash_POST_method', new Route('/trailing/simple/post-method/', array(), array(), array(), '', array(), array('POST')));
-        $trailingSlashCollection->add('regex_trailing_slash_no_methods', new Route('/trailing/regex/no-methods/{param}/', array(), array(), array(), '', array(), array()));
-        $trailingSlashCollection->add('regex_trailing_slash_GET_method', new Route('/trailing/regex/get-method/{param}/', array(), array(), array(), '', array(), array('GET')));
-        $trailingSlashCollection->add('regex_trailing_slash_HEAD_method', new Route('/trailing/regex/head-method/{param}/', array(), array(), array(), '', array(), array('HEAD')));
-        $trailingSlashCollection->add('regex_trailing_slash_POST_method', new Route('/trailing/regex/post-method/{param}/', array(), array(), array(), '', array(), array('POST')));
+        $trailingSlashCollection->add('simple_trailing_slash_no_methods', new Route('/trailing/simple/no-methods/', [], [], [], '', [], []));
+        $trailingSlashCollection->add('simple_trailing_slash_GET_method', new Route('/trailing/simple/get-method/', [], [], [], '', [], ['GET']));
+        $trailingSlashCollection->add('simple_trailing_slash_HEAD_method', new Route('/trailing/simple/head-method/', [], [], [], '', [], ['HEAD']));
+        $trailingSlashCollection->add('simple_trailing_slash_POST_method', new Route('/trailing/simple/post-method/', [], [], [], '', [], ['POST']));
+        $trailingSlashCollection->add('regex_trailing_slash_no_methods', new Route('/trailing/regex/no-methods/{param}/', [], [], [], '', [], []));
+        $trailingSlashCollection->add('regex_trailing_slash_GET_method', new Route('/trailing/regex/get-method/{param}/', [], [], [], '', [], ['GET']));
+        $trailingSlashCollection->add('regex_trailing_slash_HEAD_method', new Route('/trailing/regex/head-method/{param}/', [], [], [], '', [], ['HEAD']));
+        $trailingSlashCollection->add('regex_trailing_slash_POST_method', new Route('/trailing/regex/post-method/{param}/', [], [], [], '', [], ['POST']));
 
-        $trailingSlashCollection->add('simple_not_trailing_slash_no_methods', new Route('/not-trailing/simple/no-methods', array(), array(), array(), '', array(), array()));
-        $trailingSlashCollection->add('simple_not_trailing_slash_GET_method', new Route('/not-trailing/simple/get-method', array(), array(), array(), '', array(), array('GET')));
-        $trailingSlashCollection->add('simple_not_trailing_slash_HEAD_method', new Route('/not-trailing/simple/head-method', array(), array(), array(), '', array(), array('HEAD')));
-        $trailingSlashCollection->add('simple_not_trailing_slash_POST_method', new Route('/not-trailing/simple/post-method', array(), array(), array(), '', array(), array('POST')));
-        $trailingSlashCollection->add('regex_not_trailing_slash_no_methods', new Route('/not-trailing/regex/no-methods/{param}', array(), array(), array(), '', array(), array()));
-        $trailingSlashCollection->add('regex_not_trailing_slash_GET_method', new Route('/not-trailing/regex/get-method/{param}', array(), array(), array(), '', array(), array('GET')));
-        $trailingSlashCollection->add('regex_not_trailing_slash_HEAD_method', new Route('/not-trailing/regex/head-method/{param}', array(), array(), array(), '', array(), array('HEAD')));
-        $trailingSlashCollection->add('regex_not_trailing_slash_POST_method', new Route('/not-trailing/regex/post-method/{param}', array(), array(), array(), '', array(), array('POST')));
+        $trailingSlashCollection->add('simple_not_trailing_slash_no_methods', new Route('/not-trailing/simple/no-methods', [], [], [], '', [], []));
+        $trailingSlashCollection->add('simple_not_trailing_slash_GET_method', new Route('/not-trailing/simple/get-method', [], [], [], '', [], ['GET']));
+        $trailingSlashCollection->add('simple_not_trailing_slash_HEAD_method', new Route('/not-trailing/simple/head-method', [], [], [], '', [], ['HEAD']));
+        $trailingSlashCollection->add('simple_not_trailing_slash_POST_method', new Route('/not-trailing/simple/post-method', [], [], [], '', [], ['POST']));
+        $trailingSlashCollection->add('regex_not_trailing_slash_no_methods', new Route('/not-trailing/regex/no-methods/{param}', [], [], [], '', [], []));
+        $trailingSlashCollection->add('regex_not_trailing_slash_GET_method', new Route('/not-trailing/regex/get-method/{param}', [], [], [], '', [], ['GET']));
+        $trailingSlashCollection->add('regex_not_trailing_slash_HEAD_method', new Route('/not-trailing/regex/head-method/{param}', [], [], [], '', [], ['HEAD']));
+        $trailingSlashCollection->add('regex_not_trailing_slash_POST_method', new Route('/not-trailing/regex/post-method/{param}', [], [], [], '', [], ['POST']));
 
         /* test case 8 */
         $unicodeCollection = new RouteCollection();
-        $unicodeCollection->add('a', new Route('/{a}', array(), array('a' => 'a'), array('utf8' => false)));
-        $unicodeCollection->add('b', new Route('/{a}', array(), array('a' => '.'), array('utf8' => true)));
-        $unicodeCollection->add('c', new Route('/{a}', array(), array('a' => '.'), array('utf8' => false)));
+        $unicodeCollection->add('a', new Route('/{a}', [], ['a' => 'a'], ['utf8' => false]));
+        $unicodeCollection->add('b', new Route('/{a}', [], ['a' => '.'], ['utf8' => true]));
+        $unicodeCollection->add('c', new Route('/{a}', [], ['a' => '.'], ['utf8' => false]));
 
         /* test case 9 */
         $hostTreeCollection = new RouteCollection();
@@ -424,21 +424,21 @@ class PhpMatcherDumperTest extends TestCase
         $demoCollection = new RouteCollection();
         $demoCollection->add('a', new Route('/admin/post/'));
         $demoCollection->add('b', new Route('/admin/post/new'));
-        $demoCollection->add('c', (new Route('/admin/post/{id}'))->setRequirements(array('id' => '\d+')));
-        $demoCollection->add('d', (new Route('/admin/post/{id}/edit'))->setRequirements(array('id' => '\d+')));
-        $demoCollection->add('e', (new Route('/admin/post/{id}/delete'))->setRequirements(array('id' => '\d+')));
+        $demoCollection->add('c', (new Route('/admin/post/{id}'))->setRequirements(['id' => '\d+']));
+        $demoCollection->add('d', (new Route('/admin/post/{id}/edit'))->setRequirements(['id' => '\d+']));
+        $demoCollection->add('e', (new Route('/admin/post/{id}/delete'))->setRequirements(['id' => '\d+']));
         $demoCollection->add('f', new Route('/blog/'));
         $demoCollection->add('g', new Route('/blog/rss.xml'));
-        $demoCollection->add('h', (new Route('/blog/page/{page}'))->setRequirements(array('id' => '\d+')));
-        $demoCollection->add('i', (new Route('/blog/posts/{page}'))->setRequirements(array('id' => '\d+')));
-        $demoCollection->add('j', (new Route('/blog/comments/{id}/new'))->setRequirements(array('id' => '\d+')));
+        $demoCollection->add('h', (new Route('/blog/page/{page}'))->setRequirements(['id' => '\d+']));
+        $demoCollection->add('i', (new Route('/blog/posts/{page}'))->setRequirements(['id' => '\d+']));
+        $demoCollection->add('j', (new Route('/blog/comments/{id}/new'))->setRequirements(['id' => '\d+']));
         $demoCollection->add('k', new Route('/blog/search'));
         $demoCollection->add('l', new Route('/login'));
         $demoCollection->add('m', new Route('/logout'));
         $demoCollection->addPrefix('/{_locale}');
         $demoCollection->add('n', new Route('/{_locale}'));
-        $demoCollection->addRequirements(array('_locale' => 'en|fr'));
-        $demoCollection->addDefaults(array('_locale' => 'en'));
+        $demoCollection->addRequirements(['_locale' => 'en|fr']);
+        $demoCollection->addDefaults(['_locale' => 'en']);
 
         /* test case 12 */
         $suffixCollection = new RouteCollection();
@@ -454,27 +454,27 @@ class PhpMatcherDumperTest extends TestCase
         $hostCollection->add('r1', (new Route('abc{foo}'))->setHost('{foo}.exampple.com'));
         $hostCollection->add('r2', (new Route('abc{foo}'))->setHost('{foo}.exampple.com'));
 
-        return array(
-           array(new RouteCollection(), 'url_matcher0.php', array()),
-           array($collection, 'url_matcher1.php', array()),
-           array($redirectCollection, 'url_matcher2.php', array('base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher')),
-           array($rootprefixCollection, 'url_matcher3.php', array()),
-           array($headMatchCasesCollection, 'url_matcher4.php', array()),
-           array($groupOptimisedCollection, 'url_matcher5.php', array('base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher')),
-           array($trailingSlashCollection, 'url_matcher6.php', array()),
-           array($trailingSlashCollection, 'url_matcher7.php', array('base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher')),
-           array($unicodeCollection, 'url_matcher8.php', array()),
-           array($hostTreeCollection, 'url_matcher9.php', array()),
-           array($chunkedCollection, 'url_matcher10.php', array()),
-           array($demoCollection, 'url_matcher11.php', array('base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher')),
-           array($suffixCollection, 'url_matcher12.php', array()),
-           array($hostCollection, 'url_matcher13.php', array()),
-        );
+        return [
+           [new RouteCollection(), 'url_matcher0.php', []],
+           [$collection, 'url_matcher1.php', []],
+           [$redirectCollection, 'url_matcher2.php', ['base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher']],
+           [$rootprefixCollection, 'url_matcher3.php', []],
+           [$headMatchCasesCollection, 'url_matcher4.php', []],
+           [$groupOptimisedCollection, 'url_matcher5.php', ['base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher']],
+           [$trailingSlashCollection, 'url_matcher6.php', []],
+           [$trailingSlashCollection, 'url_matcher7.php', ['base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher']],
+           [$unicodeCollection, 'url_matcher8.php', []],
+           [$hostTreeCollection, 'url_matcher9.php', []],
+           [$chunkedCollection, 'url_matcher10.php', []],
+           [$demoCollection, 'url_matcher11.php', ['base_class' => 'Symfony\Component\Routing\Tests\Fixtures\RedirectableUrlMatcher']],
+           [$suffixCollection, 'url_matcher12.php', []],
+           [$hostCollection, 'url_matcher13.php', []],
+        ];
     }
 
     private function generateDumpedMatcher(RouteCollection $collection, $redirectableStub = false)
     {
-        $options = array('class' => $this->matcherClass);
+        $options = ['class' => $this->matcherClass];
 
         if ($redirectableStub) {
             $options['base_class'] = '\Symfony\Component\Routing\Tests\Matcher\Dumper\RedirectableUrlMatcherStub';
@@ -496,7 +496,7 @@ class PhpMatcherDumperTest extends TestCase
     public function testGenerateDumperMatcherWithObject()
     {
         $routeCollection = new RouteCollection();
-        $routeCollection->add('_', new Route('/', array(new \stdClass())));
+        $routeCollection->add('_', new Route('/', [new \stdClass()]));
         $dumper = new PhpMatcherDumper($routeCollection);
         $dumper->dump();
     }
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/StaticPrefixCollectionTest.php b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/StaticPrefixCollectionTest.php
index 24e12ac177..fe5014fc80 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/Dumper/StaticPrefixCollectionTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/Dumper/StaticPrefixCollectionTest.php
@@ -18,7 +18,7 @@ class StaticPrefixCollectionTest extends TestCase
         foreach ($routes as $route) {
             list($path, $name) = $route;
             $staticPrefix = (new Route($path))->compile()->getStaticPrefix();
-            $collection->addRoute($staticPrefix, array($name));
+            $collection->addRoute($staticPrefix, [$name]);
         }
 
         $dumped = $this->dumpCollection($collection);
@@ -27,52 +27,52 @@ class StaticPrefixCollectionTest extends TestCase
 
     public function routeProvider()
     {
-        return array(
-            'Simple - not nested' => array(
-                array(
-                    array('/', 'root'),
-                    array('/prefix/segment/', 'prefix_segment'),
-                    array('/leading/segment/', 'leading_segment'),
-                ),
+        return [
+            'Simple - not nested' => [
+                [
+                    ['/', 'root'],
+                    ['/prefix/segment/', 'prefix_segment'],
+                    ['/leading/segment/', 'leading_segment'],
+                ],
                 <<<EOF
 root
 prefix_segment
 leading_segment
 EOF
-            ),
-            'Nested - small group' => array(
-                array(
-                    array('/', 'root'),
-                    array('/prefix/segment/aa', 'prefix_segment'),
-                    array('/prefix/segment/bb', 'leading_segment'),
-                ),
+            ],
+            'Nested - small group' => [
+                [
+                    ['/', 'root'],
+                    ['/prefix/segment/aa', 'prefix_segment'],
+                    ['/prefix/segment/bb', 'leading_segment'],
+                ],
                 <<<EOF
 root
 /prefix/segment/
 -> prefix_segment
 -> leading_segment
 EOF
-            ),
-            'Nested - contains item at intersection' => array(
-                array(
-                    array('/', 'root'),
-                    array('/prefix/segment/', 'prefix_segment'),
-                    array('/prefix/segment/bb', 'leading_segment'),
-                ),
+            ],
+            'Nested - contains item at intersection' => [
+                [
+                    ['/', 'root'],
+                    ['/prefix/segment/', 'prefix_segment'],
+                    ['/prefix/segment/bb', 'leading_segment'],
+                ],
                 <<<EOF
 root
 /prefix/segment/
 -> prefix_segment
 -> leading_segment
 EOF
-            ),
-            'Simple one level nesting' => array(
-                array(
-                    array('/', 'root'),
-                    array('/group/segment/', 'nested_segment'),
-                    array('/group/thing/', 'some_segment'),
-                    array('/group/other/', 'other_segment'),
-                ),
+            ],
+            'Simple one level nesting' => [
+                [
+                    ['/', 'root'],
+                    ['/group/segment/', 'nested_segment'],
+                    ['/group/thing/', 'some_segment'],
+                    ['/group/other/', 'other_segment'],
+                ],
                 <<<EOF
 root
 /group/
@@ -80,17 +80,17 @@ root
 -> some_segment
 -> other_segment
 EOF
-            ),
-            'Retain matching order with groups' => array(
-                array(
-                    array('/group/aa/', 'aa'),
-                    array('/group/bb/', 'bb'),
-                    array('/group/cc/', 'cc'),
-                    array('/(.*)', 'root'),
-                    array('/group/dd/', 'dd'),
-                    array('/group/ee/', 'ee'),
-                    array('/group/ff/', 'ff'),
-                ),
+            ],
+            'Retain matching order with groups' => [
+                [
+                    ['/group/aa/', 'aa'],
+                    ['/group/bb/', 'bb'],
+                    ['/group/cc/', 'cc'],
+                    ['/(.*)', 'root'],
+                    ['/group/dd/', 'dd'],
+                    ['/group/ee/', 'ee'],
+                    ['/group/ff/', 'ff'],
+                ],
                 <<<EOF
 /group/
 -> aa
@@ -102,21 +102,21 @@ root
 -> ee
 -> ff
 EOF
-            ),
-            'Retain complex matching order with groups at base' => array(
-                array(
-                    array('/aaa/111/', 'first_aaa'),
-                    array('/prefixed/group/aa/', 'aa'),
-                    array('/prefixed/group/bb/', 'bb'),
-                    array('/prefixed/group/cc/', 'cc'),
-                    array('/prefixed/(.*)', 'root'),
-                    array('/prefixed/group/dd/', 'dd'),
-                    array('/prefixed/group/ee/', 'ee'),
-                    array('/prefixed/', 'parent'),
-                    array('/prefixed/group/ff/', 'ff'),
-                    array('/aaa/222/', 'second_aaa'),
-                    array('/aaa/333/', 'third_aaa'),
-                ),
+            ],
+            'Retain complex matching order with groups at base' => [
+                [
+                    ['/aaa/111/', 'first_aaa'],
+                    ['/prefixed/group/aa/', 'aa'],
+                    ['/prefixed/group/bb/', 'bb'],
+                    ['/prefixed/group/cc/', 'cc'],
+                    ['/prefixed/(.*)', 'root'],
+                    ['/prefixed/group/dd/', 'dd'],
+                    ['/prefixed/group/ee/', 'ee'],
+                    ['/prefixed/', 'parent'],
+                    ['/prefixed/group/ff/', 'ff'],
+                    ['/aaa/222/', 'second_aaa'],
+                    ['/aaa/333/', 'third_aaa'],
+                ],
                 <<<EOF
 /aaa/
 -> first_aaa
@@ -134,17 +134,17 @@ EOF
 -> -> ff
 -> parent
 EOF
-            ),
+            ],
 
-            'Group regardless of segments' => array(
-                array(
-                    array('/aaa-111/', 'a1'),
-                    array('/aaa-222/', 'a2'),
-                    array('/aaa-333/', 'a3'),
-                    array('/group-aa/', 'g1'),
-                    array('/group-bb/', 'g2'),
-                    array('/group-cc/', 'g3'),
-                ),
+            'Group regardless of segments' => [
+                [
+                    ['/aaa-111/', 'a1'],
+                    ['/aaa-222/', 'a2'],
+                    ['/aaa-333/', 'a3'],
+                    ['/group-aa/', 'g1'],
+                    ['/group-bb/', 'g2'],
+                    ['/group-cc/', 'g3'],
+                ],
                 <<<EOF
 /aaa-
 -> a1
@@ -155,13 +155,13 @@ EOF
 -> g2
 -> g3
 EOF
-            ),
-        );
+            ],
+        ];
     }
 
     private function dumpCollection(StaticPrefixCollection $collection, $prefix = '')
     {
-        $lines = array();
+        $lines = [];
 
         foreach ($collection->getRoutes() as $item) {
             if ($item instanceof StaticPrefixCollection) {
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
index f1d6b5325d..a1de37048f 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/RedirectableUrlMatcherTest.php
@@ -23,7 +23,7 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
         $coll->add('foo', new Route('/foo/'));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->will($this->returnValue(array()));
+        $matcher->expects($this->once())->method('redirect')->will($this->returnValue([]));
         $matcher->match('/foo');
     }
 
@@ -33,7 +33,7 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
         $coll->add('foo', new Route('/foo'));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->will($this->returnValue(array()));
+        $matcher->expects($this->once())->method('redirect')->will($this->returnValue([]));
         $matcher->match('/foo/');
     }
 
@@ -54,14 +54,14 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
     public function testSchemeRedirectRedirectsToFirstScheme()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo', array(), array(), array(), '', array('FTP', 'HTTPS')));
+        $coll->add('foo', new Route('/foo', [], [], [], '', ['FTP', 'HTTPS']));
 
         $matcher = $this->getUrlMatcher($coll);
         $matcher
             ->expects($this->once())
             ->method('redirect')
             ->with('/foo', 'foo', 'ftp')
-            ->will($this->returnValue(array('_route' => 'foo')))
+            ->will($this->returnValue(['_route' => 'foo']))
         ;
         $matcher->match('/foo');
     }
@@ -69,7 +69,7 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
     public function testNoSchemaRedirectIfOneOfMultipleSchemesMatches()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo', array(), array(), array(), '', array('https', 'http')));
+        $coll->add('foo', new Route('/foo', [], [], [], '', ['https', 'http']));
 
         $matcher = $this->getUrlMatcher($coll);
         $matcher
@@ -81,30 +81,30 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
     public function testSchemeRedirectWithParams()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo/{bar}', array(), array(), array(), '', array('https')));
+        $coll->add('foo', new Route('/foo/{bar}', [], [], [], '', ['https']));
 
         $matcher = $this->getUrlMatcher($coll);
         $matcher
             ->expects($this->once())
             ->method('redirect')
             ->with('/foo/baz', 'foo', 'https')
-            ->will($this->returnValue(array('redirect' => 'value')))
+            ->will($this->returnValue(['redirect' => 'value']))
         ;
-        $this->assertEquals(array('_route' => 'foo', 'bar' => 'baz', 'redirect' => 'value'), $matcher->match('/foo/baz'));
+        $this->assertEquals(['_route' => 'foo', 'bar' => 'baz', 'redirect' => 'value'], $matcher->match('/foo/baz'));
     }
 
     public function testSchemeRedirectForRoot()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/', array(), array(), array(), '', array('https')));
+        $coll->add('foo', new Route('/', [], [], [], '', ['https']));
 
         $matcher = $this->getUrlMatcher($coll);
         $matcher
             ->expects($this->once())
             ->method('redirect')
             ->with('/', 'foo', 'https')
-            ->will($this->returnValue(array('redirect' => 'value')));
-        $this->assertEquals(array('_route' => 'foo', 'redirect' => 'value'), $matcher->match('/'));
+            ->will($this->returnValue(['redirect' => 'value']));
+        $this->assertEquals(['_route' => 'foo', 'redirect' => 'value'], $matcher->match('/'));
     }
 
     public function testSlashRedirectWithParams()
@@ -117,9 +117,9 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
             ->expects($this->once())
             ->method('redirect')
             ->with('/foo/baz/', 'foo', null)
-            ->will($this->returnValue(array('redirect' => 'value')))
+            ->will($this->returnValue(['redirect' => 'value']))
         ;
-        $this->assertEquals(array('_route' => 'foo', 'bar' => 'baz', 'redirect' => 'value'), $matcher->match('/foo/baz'));
+        $this->assertEquals(['_route' => 'foo', 'bar' => 'baz', 'redirect' => 'value'], $matcher->match('/foo/baz'));
     }
 
     public function testRedirectPreservesUrlEncoding()
@@ -128,17 +128,17 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
         $coll->add('foo', new Route('/foo:bar/'));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->with('/foo%3Abar/')->willReturn(array());
+        $matcher->expects($this->once())->method('redirect')->with('/foo%3Abar/')->willReturn([]);
         $matcher->match('/foo%3Abar');
     }
 
     public function testSchemeRequirement()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo', array(), array(), array(), '', array('https')));
+        $coll->add('foo', new Route('/foo', [], [], [], '', ['https']));
         $matcher = $this->getUrlMatcher($coll, new RequestContext());
-        $matcher->expects($this->once())->method('redirect')->with('/foo', 'foo', 'https')->willReturn(array());
-        $this->assertSame(array('_route' => 'foo'), $matcher->match('/foo'));
+        $matcher->expects($this->once())->method('redirect')->with('/foo', 'foo', 'https')->willReturn([]);
+        $this->assertSame(['_route' => 'foo'], $matcher->match('/foo'));
     }
 
     public function testFallbackPage()
@@ -148,47 +148,47 @@ class RedirectableUrlMatcherTest extends UrlMatcherTest
         $coll->add('bar', new Route('/{name}'));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->with('/foo/', 'foo')->will($this->returnValue(array('_route' => 'foo')));
-        $this->assertSame(array('_route' => 'foo'), $matcher->match('/foo'));
+        $matcher->expects($this->once())->method('redirect')->with('/foo/', 'foo')->will($this->returnValue(['_route' => 'foo']));
+        $this->assertSame(['_route' => 'foo'], $matcher->match('/foo'));
 
         $coll = new RouteCollection();
         $coll->add('foo', new Route('/foo'));
         $coll->add('bar', new Route('/{name}/'));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->with('/foo', 'foo')->will($this->returnValue(array('_route' => 'foo')));
-        $this->assertSame(array('_route' => 'foo'), $matcher->match('/foo/'));
+        $matcher->expects($this->once())->method('redirect')->with('/foo', 'foo')->will($this->returnValue(['_route' => 'foo']));
+        $this->assertSame(['_route' => 'foo'], $matcher->match('/foo/'));
     }
 
     public function testMissingTrailingSlashAndScheme()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', (new Route('/foo/'))->setSchemes(array('https')));
+        $coll->add('foo', (new Route('/foo/'))->setSchemes(['https']));
 
         $matcher = $this->getUrlMatcher($coll);
-        $matcher->expects($this->once())->method('redirect')->with('/foo/', 'foo', 'https')->will($this->returnValue(array()));
+        $matcher->expects($this->once())->method('redirect')->with('/foo/', 'foo', 'https')->will($this->returnValue([]));
         $matcher->match('/foo');
     }
 
     public function testSlashAndVerbPrecedenceWithRedirection()
     {
         $coll = new RouteCollection();
-        $coll->add('a', new Route('/api/customers/{customerId}/contactpersons', array(), array(), array(), '', array(), array('post')));
-        $coll->add('b', new Route('/api/customers/{customerId}/contactpersons/', array(), array(), array(), '', array(), array('get')));
+        $coll->add('a', new Route('/api/customers/{customerId}/contactpersons', [], [], [], '', [], ['post']));
+        $coll->add('b', new Route('/api/customers/{customerId}/contactpersons/', [], [], [], '', [], ['get']));
 
         $matcher = $this->getUrlMatcher($coll);
-        $expected = array(
+        $expected = [
             '_route' => 'b',
             'customerId' => '123',
-        );
+        ];
         $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons/'));
 
-        $matcher->expects($this->once())->method('redirect')->with('/api/customers/123/contactpersons/')->willReturn(array());
+        $matcher->expects($this->once())->method('redirect')->with('/api/customers/123/contactpersons/')->willReturn([]);
         $this->assertEquals($expected, $matcher->match('/api/customers/123/contactpersons'));
     }
 
     protected function getUrlMatcher(RouteCollection $routes, RequestContext $context = null)
     {
-        return $this->getMockForAbstractClass('Symfony\Component\Routing\Matcher\RedirectableUrlMatcher', array($routes, $context ?: new RequestContext()));
+        return $this->getMockForAbstractClass('Symfony\Component\Routing\Matcher\RedirectableUrlMatcher', [$routes, $context ?: new RequestContext()]);
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php b/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
index 1f026a6ec7..04ddf845f0 100644
--- a/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
+++ b/src/Symfony/Component/Routing/Tests/Matcher/TraceableUrlMatcherTest.php
@@ -23,41 +23,41 @@ class TraceableUrlMatcherTest extends TestCase
     public function test()
     {
         $coll = new RouteCollection();
-        $coll->add('foo', new Route('/foo', array(), array(), array(), '', array(), array('POST')));
-        $coll->add('bar', new Route('/bar/{id}', array(), array('id' => '\d+')));
-        $coll->add('bar1', new Route('/bar/{name}', array(), array('id' => '\w+'), array(), '', array(), array('POST')));
-        $coll->add('bar2', new Route('/foo', array(), array(), array(), 'baz'));
-        $coll->add('bar3', new Route('/foo1', array(), array(), array(), 'baz'));
-        $coll->add('bar4', new Route('/foo2', array(), array(), array(), 'baz', array(), array(), 'context.getMethod() == "GET"'));
+        $coll->add('foo', new Route('/foo', [], [], [], '', [], ['POST']));
+        $coll->add('bar', new Route('/bar/{id}', [], ['id' => '\d+']));
+        $coll->add('bar1', new Route('/bar/{name}', [], ['id' => '\w+'], [], '', [], ['POST']));
+        $coll->add('bar2', new Route('/foo', [], [], [], 'baz'));
+        $coll->add('bar3', new Route('/foo1', [], [], [], 'baz'));
+        $coll->add('bar4', new Route('/foo2', [], [], [], 'baz', [], [], 'context.getMethod() == "GET"'));
 
         $context = new RequestContext();
         $context->setHost('baz');
 
         $matcher = new TraceableUrlMatcher($coll, $context);
         $traces = $matcher->getTraces('/babar');
-        $this->assertSame(array(0, 0, 0, 0, 0, 0), $this->getLevels($traces));
+        $this->assertSame([0, 0, 0, 0, 0, 0], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/foo');
-        $this->assertSame(array(1, 0, 0, 2), $this->getLevels($traces));
+        $this->assertSame([1, 0, 0, 2], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/bar/12');
-        $this->assertSame(array(0, 2), $this->getLevels($traces));
+        $this->assertSame([0, 2], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/bar/dd');
-        $this->assertSame(array(0, 1, 1, 0, 0, 0), $this->getLevels($traces));
+        $this->assertSame([0, 1, 1, 0, 0, 0], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/foo1');
-        $this->assertSame(array(0, 0, 0, 0, 2), $this->getLevels($traces));
+        $this->assertSame([0, 0, 0, 0, 2], $this->getLevels($traces));
 
         $context->setMethod('POST');
         $traces = $matcher->getTraces('/foo');
-        $this->assertSame(array(2), $this->getLevels($traces));
+        $this->assertSame([2], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/bar/dd');
-        $this->assertSame(array(0, 1, 2), $this->getLevels($traces));
+        $this->assertSame([0, 1, 2], $this->getLevels($traces));
 
         $traces = $matcher->getTraces('/foo2');
-        $this->assertSame(array(0, 0, 0, 0, 0, 1), $this->getLevels($traces));
+        $this->assertSame([0, 0, 0, 0, 0, 1], $this->getLevels($traces));
     }
 
     public function testMatchRouteOnMultipleHosts()
@@ -65,17 +65,17 @@ class TraceableUrlMatcherTest extends TestCase
         $routes = new RouteCollection();
         $routes->add('first', new Route(
             '/mypath/',
-            array('_controller' => 'MainBundle:Info:first'),
-            array(),
-            array(),
+            ['_controller' => 'MainBundle:Info:first'],
+            [],
+            [],
             'some.example.com'
         ));
 
         $routes->add('second', new Route(
             '/mypath/',
-            array('_controller' => 'MainBundle:Info:second'),
-            array(),
-            array(),
+            ['_controller' => 'MainBundle:Info:second'],
+            [],
+            [],
             'another.example.com'
         ));
 
@@ -86,14 +86,14 @@ class TraceableUrlMatcherTest extends TestCase
 
         $traces = $matcher->getTraces('/mypath/');
         $this->assertSame(
-            array(TraceableUrlMatcher::ROUTE_ALMOST_MATCHES, TraceableUrlMatcher::ROUTE_ALMOST_MATCHES),
+            [TraceableUrlMatcher::ROUTE_ALMOST_MATCHES, TraceableUrlMatcher::ROUTE_ALMOST_MATCHES],
             $this->getLevels($traces)
         );
     }
 
     public function getLevels($traces)
     {
-        $levels = array();
+        $levels = [];
         foreach ($traces as $trace) {
             $levels[] = $trace['level'];
         }
@@ -104,7 +104,7 @@ class TraceableUrlMatcherTest extends TestCase
     public function testRoutesWithConditions()
     {
         $routes = new RouteCollection();
-        $routes->add('foo', new Route('/foo', array(), array(), array(), 'baz', array(), array(), "request.headers.get('User-Agent') matches '/firefox/i'"));
+        $routes->add('foo', new Route('/foo', [], [], [], 'baz', [], [], "request.headers.get('User-Agent') matches '/firefox/i'"));
 
         $context = new RequestContext();
         $context->setHost('baz');
@@ -115,7 +115,7 @@ class TraceableUrlMatcherTest extends TestCase
         $traces = $matcher->getTracesForRequest($notMatchingRequest);
         $this->assertEquals("Condition \"request.headers.get('User-Agent') matches '/firefox/i'\" does not evaluate to \"true\"", $traces[0]['log']);
 
-        $matchingRequest = Request::create('/foo', 'GET', array(), array(), array(), array('HTTP_USER_AGENT' => 'Firefox'));
+        $matchingRequest = Request::create('/foo', 'GET', [], [], [], ['HTTP_USER_AGENT' => 'Firefox']);
         $traces = $matcher->getTracesForRequest($matchingRequest);
         $this->assertEquals('Route matches!', $traces[0]['log']);
     }
diff --git a/src/Symfony/Component/Routing/Tests/RequestContextTest.php b/src/Symfony/Component/Routing/Tests/RequestContextTest.php
index ffe29d1a74..3d23b0e894 100644
--- a/src/Symfony/Component/Routing/Tests/RequestContextTest.php
+++ b/src/Symfony/Component/Routing/Tests/RequestContextTest.php
@@ -68,16 +68,16 @@ class RequestContextTest extends TestCase
     public function testGetParameters()
     {
         $requestContext = new RequestContext();
-        $this->assertEquals(array(), $requestContext->getParameters());
+        $this->assertEquals([], $requestContext->getParameters());
 
-        $requestContext->setParameters(array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $requestContext->getParameters());
+        $requestContext->setParameters(['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $requestContext->getParameters());
     }
 
     public function testHasParameter()
     {
         $requestContext = new RequestContext();
-        $requestContext->setParameters(array('foo' => 'bar'));
+        $requestContext->setParameters(['foo' => 'bar']);
 
         $this->assertTrue($requestContext->hasParameter('foo'));
         $this->assertFalse($requestContext->hasParameter('baz'));
@@ -86,7 +86,7 @@ class RequestContextTest extends TestCase
     public function testGetParameter()
     {
         $requestContext = new RequestContext();
-        $requestContext->setParameters(array('foo' => 'bar'));
+        $requestContext->setParameters(['foo' => 'bar']);
 
         $this->assertEquals('bar', $requestContext->getParameter('foo'));
         $this->assertNull($requestContext->getParameter('baz'));
@@ -154,7 +154,7 @@ class RequestContextTest extends TestCase
         $this->assertSame($requestContext, $requestContext->setQueryString('foo=bar'));
         $this->assertSame($requestContext, $requestContext->setHttpPort(80));
         $this->assertSame($requestContext, $requestContext->setHttpsPort(443));
-        $this->assertSame($requestContext, $requestContext->setParameters(array()));
+        $this->assertSame($requestContext, $requestContext->setParameters([]));
         $this->assertSame($requestContext, $requestContext->setParameter('foo', 'bar'));
     }
 }
diff --git a/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php b/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
index 76a042d670..20afdff484 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCollectionBuilderTest.php
@@ -68,7 +68,7 @@ class RouteCollectionBuilderTest extends TestCase
 
     public function testImportAddResources()
     {
-        $routeCollectionBuilder = new RouteCollectionBuilder(new YamlFileLoader(new FileLocator(array(__DIR__.'/Fixtures/'))));
+        $routeCollectionBuilder = new RouteCollectionBuilder(new YamlFileLoader(new FileLocator([__DIR__.'/Fixtures/'])));
         $routeCollectionBuilder->import('file_resource.yml');
         $routeCollection = $routeCollectionBuilder->build();
 
@@ -131,13 +131,13 @@ class RouteCollectionBuilderTest extends TestCase
 
         $this->assertCount(5, $actualCollection);
         $actualRouteNames = array_keys($actualCollection->all());
-        $this->assertEquals(array(
+        $this->assertEquals([
             'checkout_route',
             'imported_route1',
             'imported_route2',
             'homepage',
             'admin_dashboard',
-        ), $actualRouteNames);
+        ], $actualRouteNames);
 
         // make sure the defaults were set
         $checkoutRoute = $actualCollection->get('checkout_route');
@@ -154,18 +154,18 @@ class RouteCollectionBuilderTest extends TestCase
         $collectionBuilder->add('/admin', 'AppBundle:Admin:dashboard', 'admin_dashboard');
         // add an unnamed route
         $collectionBuilder->add('/blogs', 'AppBundle:Blog:list')
-            ->setMethods(array('GET'));
+            ->setMethods(['GET']);
 
         // integer route names are allowed - they don't confuse things
         $collectionBuilder->add('/products', 'AppBundle:Product:list', 100);
 
         $actualCollection = $collectionBuilder->build();
         $actualRouteNames = array_keys($actualCollection->all());
-        $this->assertEquals(array(
+        $this->assertEquals([
             'admin_dashboard',
             'GET_blogs',
             '100',
-        ), $actualRouteNames);
+        ], $actualRouteNames);
     }
 
     public function testFlushSetsDetailsOnChildrenRoutes()
@@ -183,8 +183,8 @@ class RouteCollectionBuilderTest extends TestCase
             ->setOption('fooBar', true)
             ->setHost('example.com')
             ->setCondition('request.isSecure()')
-            ->setSchemes(array('https'))
-            ->setMethods(array('POST'));
+            ->setSchemes(['https'])
+            ->setMethods(['POST']);
 
         // a simple route, nothing added to it
         $routes->add('/blogs/{id}', 'editAction', 'blog_edit');
@@ -201,8 +201,8 @@ class RouteCollectionBuilderTest extends TestCase
             ->setDefault('_locale', 'fr')
             ->setRequirement('_locale', 'fr|en')
             ->setOption('niceRoute', true)
-            ->setSchemes(array('http'))
-            ->setMethods(array('GET', 'POST'));
+            ->setSchemes(['http'])
+            ->setMethods(['GET', 'POST']);
 
         $collection = $routes->build();
         $actualListRoute = $collection->get('blog_list');
@@ -216,8 +216,8 @@ class RouteCollectionBuilderTest extends TestCase
         $this->assertTrue($actualListRoute->getOption('fooBar'));
         $this->assertEquals('example.com', $actualListRoute->getHost());
         $this->assertEquals('request.isSecure()', $actualListRoute->getCondition());
-        $this->assertEquals(array('https'), $actualListRoute->getSchemes());
-        $this->assertEquals(array('POST'), $actualListRoute->getMethods());
+        $this->assertEquals(['https'], $actualListRoute->getSchemes());
+        $this->assertEquals(['POST'], $actualListRoute->getMethods());
         // inherited from the main collection
         $this->assertEquals('fr', $actualListRoute->getDefault('_locale'));
         $this->assertEquals('fr|en', $actualListRoute->getRequirement('_locale'));
@@ -227,8 +227,8 @@ class RouteCollectionBuilderTest extends TestCase
         // inherited from the collection
         $this->assertEquals('symfony.com', $actualEditRoute->getHost());
         $this->assertEquals('request.query.get("page")==1', $actualEditRoute->getCondition());
-        $this->assertEquals(array('http'), $actualEditRoute->getSchemes());
-        $this->assertEquals(array('GET', 'POST'), $actualEditRoute->getMethods());
+        $this->assertEquals(['http'], $actualEditRoute->getSchemes());
+        $this->assertEquals(['GET', 'POST'], $actualEditRoute->getMethods());
     }
 
     /**
@@ -250,16 +250,16 @@ class RouteCollectionBuilderTest extends TestCase
 
     public function providePrefixTests()
     {
-        $tests = array();
+        $tests = [];
         // empty prefix is of course ok
-        $tests[] = array('', '/foo', '/foo');
+        $tests[] = ['', '/foo', '/foo'];
         // normal prefix - does not matter if it's a wildcard
-        $tests[] = array('/{admin}', '/foo', '/{admin}/foo');
+        $tests[] = ['/{admin}', '/foo', '/{admin}/foo'];
         // shows that a prefix will always be given the starting slash
-        $tests[] = array('0', '/foo', '/0/foo');
+        $tests[] = ['0', '/foo', '/0/foo'];
 
         // spaces are ok, and double slahses at the end are cleaned
-        $tests[] = array('/ /', '/foo', '/ /foo');
+        $tests[] = ['/ /', '/foo', '/ /foo'];
 
         return $tests;
     }
@@ -323,10 +323,10 @@ class RouteCollectionBuilderTest extends TestCase
         $accountRoutes = $routes->createBuilder();
         // route 2
         $accountRoutes->add('/dashboard', '')
-            ->setMethods(array('GET'));
+            ->setMethods(['GET']);
         // route 3
         $accountRoutes->add('/dashboard', '')
-            ->setMethods(array('POST'));
+            ->setMethods(['POST']);
 
         $routes->mount('/admin', $adminRoutes);
         $routes->mount('/account', $accountRoutes);
@@ -351,7 +351,7 @@ class RouteCollectionBuilderTest extends TestCase
         $loader
             ->expects($this->any())
             ->method('load')
-            ->will($this->returnValue(array($firstCollection, $secondCollection)));
+            ->will($this->returnValue([$firstCollection, $secondCollection]));
 
         $routeCollectionBuilder = new RouteCollectionBuilder($loader);
         $routeCollectionBuilder->import('/directory/recurse/*', '/other/', 'glob');
diff --git a/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php b/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
index dd477326f6..f310d4e526 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCollectionTest.php
@@ -23,7 +23,7 @@ class RouteCollectionTest extends TestCase
         $collection = new RouteCollection();
         $route = new Route('/foo');
         $collection->add('foo', $route);
-        $this->assertEquals(array('foo' => $route), $collection->all(), '->add() adds a route');
+        $this->assertEquals(['foo' => $route], $collection->all(), '->add() adds a route');
         $this->assertEquals($route, $collection->get('foo'), '->get() returns a route by name');
         $this->assertNull($collection->get('bar'), '->get() returns null if a route does not exist');
     }
@@ -67,7 +67,7 @@ class RouteCollectionTest extends TestCase
         $collection->add('last', $last = new Route('/last'));
 
         $this->assertInstanceOf('\ArrayIterator', $collection->getIterator());
-        $this->assertSame(array('bar' => $bar, 'foo' => $foo, 'last' => $last), $collection->getIterator()->getArrayCopy());
+        $this->assertSame(['bar' => $bar, 'foo' => $foo, 'last' => $last], $collection->getIterator()->getArrayCopy());
     }
 
     public function testCount()
@@ -98,7 +98,7 @@ class RouteCollectionTest extends TestCase
         $collection->addCollection($collection1);
         $collection->add('last', $last = new Route('/last'));
 
-        $this->assertSame(array('bar' => $bar, 'foo' => $foo, 'grandchild' => $grandchild, 'last' => $last), $collection->all(),
+        $this->assertSame(['bar' => $bar, 'foo' => $foo, 'grandchild' => $grandchild, 'last' => $last], $collection->all(),
             '->addCollection() imports routes of another collection, overrides if necessary and adds them at the end');
     }
 
@@ -109,7 +109,7 @@ class RouteCollectionTest extends TestCase
         $collection1 = new RouteCollection();
         $collection1->addResource($foo1 = new FileResource(__DIR__.'/Fixtures/foo1.xml'));
         $collection->addCollection($collection1);
-        $this->assertEquals(array($foo, $foo1), $collection->getResources(), '->addCollection() merges resources');
+        $this->assertEquals([$foo, $foo1], $collection->getResources(), '->addCollection() merges resources');
     }
 
     public function testAddDefaultsAndRequirementsAndOptions()
@@ -118,23 +118,23 @@ class RouteCollectionTest extends TestCase
         $collection->add('foo', new Route('/{placeholder}'));
         $collection1 = new RouteCollection();
         $collection1->add('bar', new Route('/{placeholder}',
-            array('_controller' => 'fixed', 'placeholder' => 'default'), array('placeholder' => '.+'), array('option' => 'value'))
+            ['_controller' => 'fixed', 'placeholder' => 'default'], ['placeholder' => '.+'], ['option' => 'value'])
         );
         $collection->addCollection($collection1);
 
-        $collection->addDefaults(array('placeholder' => 'new-default'));
-        $this->assertEquals(array('placeholder' => 'new-default'), $collection->get('foo')->getDefaults(), '->addDefaults() adds defaults to all routes');
-        $this->assertEquals(array('_controller' => 'fixed', 'placeholder' => 'new-default'), $collection->get('bar')->getDefaults(),
+        $collection->addDefaults(['placeholder' => 'new-default']);
+        $this->assertEquals(['placeholder' => 'new-default'], $collection->get('foo')->getDefaults(), '->addDefaults() adds defaults to all routes');
+        $this->assertEquals(['_controller' => 'fixed', 'placeholder' => 'new-default'], $collection->get('bar')->getDefaults(),
             '->addDefaults() adds defaults to all routes and overwrites existing ones');
 
-        $collection->addRequirements(array('placeholder' => '\d+'));
-        $this->assertEquals(array('placeholder' => '\d+'), $collection->get('foo')->getRequirements(), '->addRequirements() adds requirements to all routes');
-        $this->assertEquals(array('placeholder' => '\d+'), $collection->get('bar')->getRequirements(),
+        $collection->addRequirements(['placeholder' => '\d+']);
+        $this->assertEquals(['placeholder' => '\d+'], $collection->get('foo')->getRequirements(), '->addRequirements() adds requirements to all routes');
+        $this->assertEquals(['placeholder' => '\d+'], $collection->get('bar')->getRequirements(),
             '->addRequirements() adds requirements to all routes and overwrites existing ones');
 
-        $collection->addOptions(array('option' => 'new-value'));
+        $collection->addOptions(['option' => 'new-value']);
         $this->assertEquals(
-            array('option' => 'new-value', 'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler'),
+            ['option' => 'new-value', 'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler'],
             $collection->get('bar')->getOptions(), '->addOptions() adds options to all routes and overwrites existing ones'
         );
     }
@@ -148,13 +148,13 @@ class RouteCollectionTest extends TestCase
         $collection->addCollection($collection2);
         $collection->addPrefix(' / ');
         $this->assertSame('/foo', $collection->get('foo')->getPath(), '->addPrefix() trims the prefix and a single slash has no effect');
-        $collection->addPrefix('/{admin}', array('admin' => 'admin'), array('admin' => '\d+'));
+        $collection->addPrefix('/{admin}', ['admin' => 'admin'], ['admin' => '\d+']);
         $this->assertEquals('/{admin}/foo', $collection->get('foo')->getPath(), '->addPrefix() adds a prefix to all routes');
         $this->assertEquals('/{admin}/bar', $collection->get('bar')->getPath(), '->addPrefix() adds a prefix to all routes');
-        $this->assertEquals(array('admin' => 'admin'), $collection->get('foo')->getDefaults(), '->addPrefix() adds defaults to all routes');
-        $this->assertEquals(array('admin' => 'admin'), $collection->get('bar')->getDefaults(), '->addPrefix() adds defaults to all routes');
-        $this->assertEquals(array('admin' => '\d+'), $collection->get('foo')->getRequirements(), '->addPrefix() adds requirements to all routes');
-        $this->assertEquals(array('admin' => '\d+'), $collection->get('bar')->getRequirements(), '->addPrefix() adds requirements to all routes');
+        $this->assertEquals(['admin' => 'admin'], $collection->get('foo')->getDefaults(), '->addPrefix() adds defaults to all routes');
+        $this->assertEquals(['admin' => 'admin'], $collection->get('bar')->getDefaults(), '->addPrefix() adds defaults to all routes');
+        $this->assertEquals(['admin' => '\d+'], $collection->get('foo')->getRequirements(), '->addPrefix() adds requirements to all routes');
+        $this->assertEquals(['admin' => '\d+'], $collection->get('bar')->getRequirements(), '->addPrefix() adds requirements to all routes');
         $collection->addPrefix('0');
         $this->assertEquals('/0/{admin}/foo', $collection->get('foo')->getPath(), '->addPrefix() ensures a prefix must start with a slash and must not end with a slash');
         $collection->addPrefix('/ /');
@@ -166,8 +166,8 @@ class RouteCollectionTest extends TestCase
     {
         $collection = new RouteCollection();
         $collection->add('foo', $foo = new Route('/foo.{_format}'));
-        $collection->add('bar', $bar = new Route('/bar.{_format}', array(), array('_format' => 'json')));
-        $collection->addPrefix('/admin', array(), array('_format' => 'html'));
+        $collection->add('bar', $bar = new Route('/bar.{_format}', [], ['_format' => 'json']));
+        $collection->addPrefix('/admin', [], ['_format' => 'html']);
 
         $this->assertEquals('html', $collection->get('foo')->getRequirement('_format'), '->addPrefix() overrides existing requirements');
         $this->assertEquals('html', $collection->get('bar')->getRequirement('_format'), '->addPrefix() overrides existing requirements');
@@ -180,7 +180,7 @@ class RouteCollectionTest extends TestCase
         $collection->addResource($bar = new FileResource(__DIR__.'/Fixtures/bar.xml'));
         $collection->addResource(new FileResource(__DIR__.'/Fixtures/foo.xml'));
 
-        $this->assertEquals(array($foo, $bar), $collection->getResources(),
+        $this->assertEquals([$foo, $bar], $collection->getResources(),
             '->addResource() adds a resource and getResources() only returns unique ones by comparing the string representation');
     }
 
@@ -227,16 +227,16 @@ class RouteCollectionTest extends TestCase
         $collection->add('last', $last = new Route('/last'));
 
         $collection->remove('foo');
-        $this->assertSame(array('bar' => $bar, 'last' => $last), $collection->all(), '->remove() can remove a single route');
-        $collection->remove(array('bar', 'last'));
-        $this->assertSame(array(), $collection->all(), '->remove() accepts an array and can remove multiple routes at once');
+        $this->assertSame(['bar' => $bar, 'last' => $last], $collection->all(), '->remove() can remove a single route');
+        $collection->remove(['bar', 'last']);
+        $this->assertSame([], $collection->all(), '->remove() accepts an array and can remove multiple routes at once');
     }
 
     public function testSetHost()
     {
         $collection = new RouteCollection();
         $routea = new Route('/a');
-        $routeb = new Route('/b', array(), array(), array(), '{locale}.example.net');
+        $routeb = new Route('/b', [], [], [], '{locale}.example.net');
         $collection->add('a', $routea);
         $collection->add('b', $routeb);
 
@@ -250,7 +250,7 @@ class RouteCollectionTest extends TestCase
     {
         $collection = new RouteCollection();
         $routea = new Route('/a');
-        $routeb = new Route('/b', array(), array(), array(), '{locale}.example.net', array(), array(), 'context.getMethod() == "GET"');
+        $routeb = new Route('/b', [], [], [], '{locale}.example.net', [], [], 'context.getMethod() == "GET"');
         $collection->add('a', $routea);
         $collection->add('b', $routeb);
 
@@ -264,7 +264,7 @@ class RouteCollectionTest extends TestCase
     {
         $collection = new RouteCollection();
         $collection->add('a', new Route('/a'));
-        $collection->add('b', new Route('/b', array('placeholder' => 'default'), array('placeholder' => '.+')));
+        $collection->add('b', new Route('/b', ['placeholder' => 'default'], ['placeholder' => '.+']));
 
         $clonedCollection = clone $collection;
 
@@ -278,29 +278,29 @@ class RouteCollectionTest extends TestCase
     public function testSetSchemes()
     {
         $collection = new RouteCollection();
-        $routea = new Route('/a', array(), array(), array(), '', 'http');
+        $routea = new Route('/a', [], [], [], '', 'http');
         $routeb = new Route('/b');
         $collection->add('a', $routea);
         $collection->add('b', $routeb);
 
-        $collection->setSchemes(array('http', 'https'));
+        $collection->setSchemes(['http', 'https']);
 
-        $this->assertEquals(array('http', 'https'), $routea->getSchemes());
-        $this->assertEquals(array('http', 'https'), $routeb->getSchemes());
+        $this->assertEquals(['http', 'https'], $routea->getSchemes());
+        $this->assertEquals(['http', 'https'], $routeb->getSchemes());
     }
 
     public function testSetMethods()
     {
         $collection = new RouteCollection();
-        $routea = new Route('/a', array(), array(), array(), '', array(), array('GET', 'POST'));
+        $routea = new Route('/a', [], [], [], '', [], ['GET', 'POST']);
         $routeb = new Route('/b');
         $collection->add('a', $routea);
         $collection->add('b', $routeb);
 
         $collection->setMethods('PUT');
 
-        $this->assertEquals(array('PUT'), $routea->getMethods());
-        $this->assertEquals(array('PUT'), $routeb->getMethods());
+        $this->assertEquals(['PUT'], $routea->getMethods());
+        $this->assertEquals(['PUT'], $routeb->getMethods());
     }
 
     public function testAddNamePrefix()
@@ -321,9 +321,9 @@ class RouteCollectionTest extends TestCase
     public function testAddNamePrefixCanonicalRouteName()
     {
         $collection = new RouteCollection();
-        $collection->add('foo', new Route('/foo', array('_canonical_route' => 'foo')));
-        $collection->add('bar', new Route('/bar', array('_canonical_route' => 'bar')));
-        $collection->add('api_foo', new Route('/api/foo', array('_canonical_route' => 'api_foo')));
+        $collection->add('foo', new Route('/foo', ['_canonical_route' => 'foo']));
+        $collection->add('bar', new Route('/bar', ['_canonical_route' => 'bar']));
+        $collection->add('api_foo', new Route('/api/foo', ['_canonical_route' => 'api_foo']));
         $collection->addNamePrefix('api_');
 
         $this->assertEquals('api_foo', $collection->get('api_foo')->getDefault('_canonical_route'));
diff --git a/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php b/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
index 04bcdac918..705b5a0616 100644
--- a/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteCompilerTest.php
@@ -34,153 +34,153 @@ class RouteCompilerTest extends TestCase
 
     public function provideCompileData()
     {
-        return array(
-            array(
+        return [
+            [
                 'Static route',
-                array('/foo'),
-                '/foo', '#^/foo$#sD', array(), array(
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo'],
+                '/foo', '#^/foo$#sD', [], [
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with a variable',
-                array('/foo/{bar}'),
-                '/foo', '#^/foo/(?P<bar>[^/]++)$#sD', array('bar'), array(
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}'],
+                '/foo', '#^/foo/(?P<bar>[^/]++)$#sD', ['bar'], [
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with a variable that has a default value',
-                array('/foo/{bar}', array('bar' => 'bar')),
-                '/foo', '#^/foo(?:/(?P<bar>[^/]++))?$#sD', array('bar'), array(
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}', ['bar' => 'bar']],
+                '/foo', '#^/foo(?:/(?P<bar>[^/]++))?$#sD', ['bar'], [
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with several variables',
-                array('/foo/{bar}/{foobar}'),
-                '/foo', '#^/foo/(?P<bar>[^/]++)/(?P<foobar>[^/]++)$#sD', array('bar', 'foobar'), array(
-                    array('variable', '/', '[^/]++', 'foobar'),
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}/{foobar}'],
+                '/foo', '#^/foo/(?P<bar>[^/]++)/(?P<foobar>[^/]++)$#sD', ['bar', 'foobar'], [
+                    ['variable', '/', '[^/]++', 'foobar'],
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with several variables that have default values',
-                array('/foo/{bar}/{foobar}', array('bar' => 'bar', 'foobar' => '')),
-                '/foo', '#^/foo(?:/(?P<bar>[^/]++)(?:/(?P<foobar>[^/]++))?)?$#sD', array('bar', 'foobar'), array(
-                    array('variable', '/', '[^/]++', 'foobar'),
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}/{foobar}', ['bar' => 'bar', 'foobar' => '']],
+                '/foo', '#^/foo(?:/(?P<bar>[^/]++)(?:/(?P<foobar>[^/]++))?)?$#sD', ['bar', 'foobar'], [
+                    ['variable', '/', '[^/]++', 'foobar'],
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with several variables but some of them have no default values',
-                array('/foo/{bar}/{foobar}', array('bar' => 'bar')),
-                '/foo', '#^/foo/(?P<bar>[^/]++)/(?P<foobar>[^/]++)$#sD', array('bar', 'foobar'), array(
-                    array('variable', '/', '[^/]++', 'foobar'),
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}/{foobar}', ['bar' => 'bar']],
+                '/foo', '#^/foo/(?P<bar>[^/]++)/(?P<foobar>[^/]++)$#sD', ['bar', 'foobar'], [
+                    ['variable', '/', '[^/]++', 'foobar'],
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with an optional variable as the first segment',
-                array('/{bar}', array('bar' => 'bar')),
-                '', '#^/(?P<bar>[^/]++)?$#sD', array('bar'), array(
-                    array('variable', '/', '[^/]++', 'bar'),
-                ),
-            ),
+                ['/{bar}', ['bar' => 'bar']],
+                '', '#^/(?P<bar>[^/]++)?$#sD', ['bar'], [
+                    ['variable', '/', '[^/]++', 'bar'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with a requirement of 0',
-                array('/{bar}', array('bar' => null), array('bar' => '0')),
-                '', '#^/(?P<bar>0)?$#sD', array('bar'), array(
-                    array('variable', '/', '0', 'bar'),
-                ),
-            ),
+                ['/{bar}', ['bar' => null], ['bar' => '0']],
+                '', '#^/(?P<bar>0)?$#sD', ['bar'], [
+                    ['variable', '/', '0', 'bar'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with an optional variable as the first segment with requirements',
-                array('/{bar}', array('bar' => 'bar'), array('bar' => '(foo|bar)')),
-                '', '#^/(?P<bar>(?:foo|bar))?$#sD', array('bar'), array(
-                    array('variable', '/', '(?:foo|bar)', 'bar'),
-                ),
-            ),
+                ['/{bar}', ['bar' => 'bar'], ['bar' => '(foo|bar)']],
+                '', '#^/(?P<bar>(?:foo|bar))?$#sD', ['bar'], [
+                    ['variable', '/', '(?:foo|bar)', 'bar'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with only optional variables',
-                array('/{foo}/{bar}', array('foo' => 'foo', 'bar' => 'bar')),
-                '', '#^/(?P<foo>[^/]++)?(?:/(?P<bar>[^/]++))?$#sD', array('foo', 'bar'), array(
-                    array('variable', '/', '[^/]++', 'bar'),
-                    array('variable', '/', '[^/]++', 'foo'),
-                ),
-            ),
+                ['/{foo}/{bar}', ['foo' => 'foo', 'bar' => 'bar']],
+                '', '#^/(?P<foo>[^/]++)?(?:/(?P<bar>[^/]++))?$#sD', ['foo', 'bar'], [
+                    ['variable', '/', '[^/]++', 'bar'],
+                    ['variable', '/', '[^/]++', 'foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with a variable in last position',
-                array('/foo-{bar}'),
-                '/foo-', '#^/foo\-(?P<bar>[^/]++)$#sD', array('bar'), array(
-                    array('variable', '-', '[^/]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo-{bar}'],
+                '/foo-', '#^/foo\-(?P<bar>[^/]++)$#sD', ['bar'], [
+                    ['variable', '-', '[^/]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with nested placeholders',
-                array('/{static{var}static}'),
-                '/{static', '#^/\{static(?P<var>[^/]+)static\}$#sD', array('var'), array(
-                    array('text', 'static}'),
-                    array('variable', '', '[^/]+', 'var'),
-                    array('text', '/{static'),
-                ),
-            ),
+                ['/{static{var}static}'],
+                '/{static', '#^/\{static(?P<var>[^/]+)static\}$#sD', ['var'], [
+                    ['text', 'static}'],
+                    ['variable', '', '[^/]+', 'var'],
+                    ['text', '/{static'],
+                ],
+            ],
 
-            array(
+            [
                 'Route without separator between variables',
-                array('/{w}{x}{y}{z}.{_format}', array('z' => 'default-z', '_format' => 'html'), array('y' => '(y|Y)')),
-                '', '#^/(?P<w>[^/\.]+)(?P<x>[^/\.]+)(?P<y>(?:y|Y))(?:(?P<z>[^/\.]++)(?:\.(?P<_format>[^/]++))?)?$#sD', array('w', 'x', 'y', 'z', '_format'), array(
-                    array('variable', '.', '[^/]++', '_format'),
-                    array('variable', '', '[^/\.]++', 'z'),
-                    array('variable', '', '(?:y|Y)', 'y'),
-                    array('variable', '', '[^/\.]+', 'x'),
-                    array('variable', '/', '[^/\.]+', 'w'),
-                ),
-            ),
+                ['/{w}{x}{y}{z}.{_format}', ['z' => 'default-z', '_format' => 'html'], ['y' => '(y|Y)']],
+                '', '#^/(?P<w>[^/\.]+)(?P<x>[^/\.]+)(?P<y>(?:y|Y))(?:(?P<z>[^/\.]++)(?:\.(?P<_format>[^/]++))?)?$#sD', ['w', 'x', 'y', 'z', '_format'], [
+                    ['variable', '.', '[^/]++', '_format'],
+                    ['variable', '', '[^/\.]++', 'z'],
+                    ['variable', '', '(?:y|Y)', 'y'],
+                    ['variable', '', '[^/\.]+', 'x'],
+                    ['variable', '/', '[^/\.]+', 'w'],
+                ],
+            ],
 
-            array(
+            [
                 'Route with a format',
-                array('/foo/{bar}.{_format}'),
-                '/foo', '#^/foo/(?P<bar>[^/\.]++)\.(?P<_format>[^/]++)$#sD', array('bar', '_format'), array(
-                    array('variable', '.', '[^/]++', '_format'),
-                    array('variable', '/', '[^/\.]++', 'bar'),
-                    array('text', '/foo'),
-                ),
-            ),
+                ['/foo/{bar}.{_format}'],
+                '/foo', '#^/foo/(?P<bar>[^/\.]++)\.(?P<_format>[^/]++)$#sD', ['bar', '_format'], [
+                    ['variable', '.', '[^/]++', '_format'],
+                    ['variable', '/', '[^/\.]++', 'bar'],
+                    ['text', '/foo'],
+                ],
+            ],
 
-            array(
+            [
                 'Static non UTF-8 route',
-                array("/fo\xE9"),
-                "/fo\xE9", "#^/fo\xE9$#sD", array(), array(
-                    array('text', "/fo\xE9"),
-                ),
-            ),
+                ["/fo\xE9"],
+                "/fo\xE9", "#^/fo\xE9$#sD", [], [
+                    ['text', "/fo\xE9"],
+                ],
+            ],
 
-            array(
+            [
                 'Route with an explicit UTF-8 requirement',
-                array('/{bar}', array('bar' => null), array('bar' => '.'), array('utf8' => true)),
-                '', '#^/(?P<bar>.)?$#sDu', array('bar'), array(
-                    array('variable', '/', '.', 'bar', true),
-                ),
-            ),
-        );
+                ['/{bar}', ['bar' => null], ['bar' => '.'], ['utf8' => true]],
+                '', '#^/(?P<bar>.)?$#sDu', ['bar'], [
+                    ['variable', '/', '.', 'bar', true],
+                ],
+            ],
+        ];
     }
 
     /**
@@ -201,45 +201,45 @@ class RouteCompilerTest extends TestCase
 
     public function provideCompileImplicitUtf8Data()
     {
-        return array(
-            array(
+        return [
+            [
                 'Static UTF-8 route',
-                array('/foé'),
-                '/foé', '#^/foé$#sDu', array(), array(
-                    array('text', '/foé'),
-                ),
+                ['/foé'],
+                '/foé', '#^/foé$#sDu', [], [
+                    ['text', '/foé'],
+                ],
                 'patterns',
-            ),
+            ],
 
-            array(
+            [
                 'Route with an implicit UTF-8 requirement',
-                array('/{bar}', array('bar' => null), array('bar' => 'é')),
-                '', '#^/(?P<bar>é)?$#sDu', array('bar'), array(
-                    array('variable', '/', 'é', 'bar', true),
-                ),
+                ['/{bar}', ['bar' => null], ['bar' => 'é']],
+                '', '#^/(?P<bar>é)?$#sDu', ['bar'], [
+                    ['variable', '/', 'é', 'bar', true],
+                ],
                 'requirements',
-            ),
+            ],
 
-            array(
+            [
                 'Route with a UTF-8 class requirement',
-                array('/{bar}', array('bar' => null), array('bar' => '\pM')),
-                '', '#^/(?P<bar>\pM)?$#sDu', array('bar'), array(
-                    array('variable', '/', '\pM', 'bar', true),
-                ),
+                ['/{bar}', ['bar' => null], ['bar' => '\pM']],
+                '', '#^/(?P<bar>\pM)?$#sDu', ['bar'], [
+                    ['variable', '/', '\pM', 'bar', true],
+                ],
                 'requirements',
-            ),
+            ],
 
-            array(
+            [
                 'Route with a UTF-8 separator',
-                array('/foo/{bar}§{_format}', array(), array(), array('compiler_class' => Utf8RouteCompiler::class)),
-                '/foo', '#^/foo/(?P<bar>[^/§]++)§(?P<_format>[^/]++)$#sDu', array('bar', '_format'), array(
-                    array('variable', '§', '[^/]++', '_format', true),
-                    array('variable', '/', '[^/§]++', 'bar', true),
-                    array('text', '/foo'),
-                ),
+                ['/foo/{bar}§{_format}', [], [], ['compiler_class' => Utf8RouteCompiler::class]],
+                '/foo', '#^/foo/(?P<bar>[^/§]++)§(?P<_format>[^/]++)$#sDu', ['bar', '_format'], [
+                    ['variable', '§', '[^/]++', '_format', true],
+                    ['variable', '/', '[^/§]++', 'bar', true],
+                    ['text', '/foo'],
+                ],
                 'patterns',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -257,7 +257,7 @@ class RouteCompilerTest extends TestCase
      */
     public function testRouteCharsetMismatch()
     {
-        $route = new Route("/\xE9/{bar}", array(), array('bar' => '.'), array('utf8' => true));
+        $route = new Route("/\xE9/{bar}", [], ['bar' => '.'], ['utf8' => true]);
 
         $compiled = $route->compile();
     }
@@ -267,7 +267,7 @@ class RouteCompilerTest extends TestCase
      */
     public function testRequirementCharsetMismatch()
     {
-        $route = new Route('/foo/{bar}', array(), array('bar' => "\xE9"), array('utf8' => true));
+        $route = new Route('/foo/{bar}', [], ['bar' => "\xE9"], ['utf8' => true]);
 
         $compiled = $route->compile();
     }
@@ -294,11 +294,11 @@ class RouteCompilerTest extends TestCase
 
     public function getVariableNamesStartingWithADigit()
     {
-        return array(
-           array('09'),
-           array('123'),
-           array('1e2'),
-        );
+        return [
+           ['09'],
+           ['123'],
+           ['1e2'],
+        ];
     }
 
     /**
@@ -311,65 +311,65 @@ class RouteCompilerTest extends TestCase
 
         $compiled = $route->compile();
         $this->assertEquals($prefix, $compiled->getStaticPrefix(), $name.' (static prefix)');
-        $this->assertEquals($regex, str_replace(array("\n", ' '), '', $compiled->getRegex()), $name.' (regex)');
+        $this->assertEquals($regex, str_replace(["\n", ' '], '', $compiled->getRegex()), $name.' (regex)');
         $this->assertEquals($variables, $compiled->getVariables(), $name.' (variables)');
         $this->assertEquals($pathVariables, $compiled->getPathVariables(), $name.' (path variables)');
         $this->assertEquals($tokens, $compiled->getTokens(), $name.' (tokens)');
-        $this->assertEquals($hostRegex, str_replace(array("\n", ' '), '', $compiled->getHostRegex()), $name.' (host regex)');
+        $this->assertEquals($hostRegex, str_replace(["\n", ' '], '', $compiled->getHostRegex()), $name.' (host regex)');
         $this->assertEquals($hostVariables, $compiled->getHostVariables(), $name.' (host variables)');
         $this->assertEquals($hostTokens, $compiled->getHostTokens(), $name.' (host tokens)');
     }
 
     public function provideCompileWithHostData()
     {
-        return array(
-            array(
+        return [
+            [
                 'Route with host pattern',
-                array('/hello', array(), array(), array(), 'www.example.com'),
-                '/hello', '#^/hello$#sD', array(), array(), array(
-                    array('text', '/hello'),
-                ),
-                '#^www\.example\.com$#sDi', array(), array(
-                    array('text', 'www.example.com'),
-                ),
-            ),
-            array(
+                ['/hello', [], [], [], 'www.example.com'],
+                '/hello', '#^/hello$#sD', [], [], [
+                    ['text', '/hello'],
+                ],
+                '#^www\.example\.com$#sDi', [], [
+                    ['text', 'www.example.com'],
+                ],
+            ],
+            [
                 'Route with host pattern and some variables',
-                array('/hello/{name}', array(), array(), array(), 'www.example.{tld}'),
-                '/hello', '#^/hello/(?P<name>[^/]++)$#sD', array('tld', 'name'), array('name'), array(
-                    array('variable', '/', '[^/]++', 'name'),
-                    array('text', '/hello'),
-                ),
-                '#^www\.example\.(?P<tld>[^\.]++)$#sDi', array('tld'), array(
-                    array('variable', '.', '[^\.]++', 'tld'),
-                    array('text', 'www.example'),
-                ),
-            ),
-            array(
+                ['/hello/{name}', [], [], [], 'www.example.{tld}'],
+                '/hello', '#^/hello/(?P<name>[^/]++)$#sD', ['tld', 'name'], ['name'], [
+                    ['variable', '/', '[^/]++', 'name'],
+                    ['text', '/hello'],
+                ],
+                '#^www\.example\.(?P<tld>[^\.]++)$#sDi', ['tld'], [
+                    ['variable', '.', '[^\.]++', 'tld'],
+                    ['text', 'www.example'],
+                ],
+            ],
+            [
                 'Route with variable at beginning of host',
-                array('/hello', array(), array(), array(), '{locale}.example.{tld}'),
-                '/hello', '#^/hello$#sD', array('locale', 'tld'), array(), array(
-                    array('text', '/hello'),
-                ),
-                '#^(?P<locale>[^\.]++)\.example\.(?P<tld>[^\.]++)$#sDi', array('locale', 'tld'), array(
-                    array('variable', '.', '[^\.]++', 'tld'),
-                    array('text', '.example'),
-                    array('variable', '', '[^\.]++', 'locale'),
-                ),
-            ),
-            array(
+                ['/hello', [], [], [], '{locale}.example.{tld}'],
+                '/hello', '#^/hello$#sD', ['locale', 'tld'], [], [
+                    ['text', '/hello'],
+                ],
+                '#^(?P<locale>[^\.]++)\.example\.(?P<tld>[^\.]++)$#sDi', ['locale', 'tld'], [
+                    ['variable', '.', '[^\.]++', 'tld'],
+                    ['text', '.example'],
+                    ['variable', '', '[^\.]++', 'locale'],
+                ],
+            ],
+            [
                 'Route with host variables that has a default value',
-                array('/hello', array('locale' => 'a', 'tld' => 'b'), array(), array(), '{locale}.example.{tld}'),
-                '/hello', '#^/hello$#sD', array('locale', 'tld'), array(), array(
-                    array('text', '/hello'),
-                ),
-                '#^(?P<locale>[^\.]++)\.example\.(?P<tld>[^\.]++)$#sDi', array('locale', 'tld'), array(
-                    array('variable', '.', '[^\.]++', 'tld'),
-                    array('text', '.example'),
-                    array('variable', '', '[^\.]++', 'locale'),
-                ),
-            ),
-        );
+                ['/hello', ['locale' => 'a', 'tld' => 'b'], [], [], '{locale}.example.{tld}'],
+                '/hello', '#^/hello$#sD', ['locale', 'tld'], [], [
+                    ['text', '/hello'],
+                ],
+                '#^(?P<locale>[^\.]++)\.example\.(?P<tld>[^\.]++)$#sDi', ['locale', 'tld'], [
+                    ['variable', '.', '[^\.]++', 'tld'],
+                    ['text', '.example'],
+                    ['variable', '', '[^\.]++', 'locale'],
+                ],
+            ],
+        ];
     }
 
     /**
@@ -386,19 +386,19 @@ class RouteCompilerTest extends TestCase
      */
     public function testRemoveCapturingGroup($regex, $requirement)
     {
-        $route = new Route('/{foo}', array(), array('foo' => $requirement));
+        $route = new Route('/{foo}', [], ['foo' => $requirement]);
 
         $this->assertSame($regex, $route->compile()->getRegex());
     }
 
     public function provideRemoveCapturingGroup()
     {
-        yield array('#^/(?P<foo>a(?:b|c)(?:d|e)f)$#sD', 'a(b|c)(d|e)f');
-        yield array('#^/(?P<foo>a\(b\)c)$#sD', 'a\(b\)c');
-        yield array('#^/(?P<foo>(?:b))$#sD', '(?:b)');
-        yield array('#^/(?P<foo>(?(b)b))$#sD', '(?(b)b)');
-        yield array('#^/(?P<foo>(*F))$#sD', '(*F)');
-        yield array('#^/(?P<foo>(?:(?:foo)))$#sD', '((foo))');
+        yield ['#^/(?P<foo>a(?:b|c)(?:d|e)f)$#sD', 'a(b|c)(d|e)f'];
+        yield ['#^/(?P<foo>a\(b\)c)$#sD', 'a\(b\)c'];
+        yield ['#^/(?P<foo>(?:b))$#sD', '(?:b)'];
+        yield ['#^/(?P<foo>(?(b)b))$#sD', '(?(b)b)'];
+        yield ['#^/(?P<foo>(*F))$#sD', '(*F)'];
+        yield ['#^/(?P<foo>(?:(?:foo)))$#sD', '((foo))'];
     }
 }
 
diff --git a/src/Symfony/Component/Routing/Tests/RouteTest.php b/src/Symfony/Component/Routing/Tests/RouteTest.php
index e28cdaf593..565dbfe568 100644
--- a/src/Symfony/Component/Routing/Tests/RouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteTest.php
@@ -18,21 +18,21 @@ class RouteTest extends TestCase
 {
     public function testConstructor()
     {
-        $route = new Route('/{foo}', array('foo' => 'bar'), array('foo' => '\d+'), array('foo' => 'bar'), '{locale}.example.com');
+        $route = new Route('/{foo}', ['foo' => 'bar'], ['foo' => '\d+'], ['foo' => 'bar'], '{locale}.example.com');
         $this->assertEquals('/{foo}', $route->getPath(), '__construct() takes a path as its first argument');
-        $this->assertEquals(array('foo' => 'bar'), $route->getDefaults(), '__construct() takes defaults as its second argument');
-        $this->assertEquals(array('foo' => '\d+'), $route->getRequirements(), '__construct() takes requirements as its third argument');
+        $this->assertEquals(['foo' => 'bar'], $route->getDefaults(), '__construct() takes defaults as its second argument');
+        $this->assertEquals(['foo' => '\d+'], $route->getRequirements(), '__construct() takes requirements as its third argument');
         $this->assertEquals('bar', $route->getOption('foo'), '__construct() takes options as its fourth argument');
         $this->assertEquals('{locale}.example.com', $route->getHost(), '__construct() takes a host pattern as its fifth argument');
 
-        $route = new Route('/', array(), array(), array(), '', array('Https'), array('POST', 'put'), 'context.getMethod() == "GET"');
-        $this->assertEquals(array('https'), $route->getSchemes(), '__construct() takes schemes as its sixth argument and lowercases it');
-        $this->assertEquals(array('POST', 'PUT'), $route->getMethods(), '__construct() takes methods as its seventh argument and uppercases it');
+        $route = new Route('/', [], [], [], '', ['Https'], ['POST', 'put'], 'context.getMethod() == "GET"');
+        $this->assertEquals(['https'], $route->getSchemes(), '__construct() takes schemes as its sixth argument and lowercases it');
+        $this->assertEquals(['POST', 'PUT'], $route->getMethods(), '__construct() takes methods as its seventh argument and uppercases it');
         $this->assertEquals('context.getMethod() == "GET"', $route->getCondition(), '__construct() takes a condition as its eight argument');
 
-        $route = new Route('/', array(), array(), array(), '', 'Https', 'Post');
-        $this->assertEquals(array('https'), $route->getSchemes(), '__construct() takes a single scheme as its sixth argument');
-        $this->assertEquals(array('POST'), $route->getMethods(), '__construct() takes a single method as its seventh argument');
+        $route = new Route('/', [], [], [], '', 'Https', 'Post');
+        $this->assertEquals(['https'], $route->getSchemes(), '__construct() takes a single scheme as its sixth argument');
+        $this->assertEquals(['POST'], $route->getMethods(), '__construct() takes a single method as its seventh argument');
     }
 
     public function testPath()
@@ -52,16 +52,16 @@ class RouteTest extends TestCase
     public function testOptions()
     {
         $route = new Route('/{foo}');
-        $route->setOptions(array('foo' => 'bar'));
-        $this->assertEquals(array_merge(array(
+        $route->setOptions(['foo' => 'bar']);
+        $this->assertEquals(array_merge([
         'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler',
-        ), array('foo' => 'bar')), $route->getOptions(), '->setOptions() sets the options');
-        $this->assertEquals($route, $route->setOptions(array()), '->setOptions() implements a fluent interface');
+        ], ['foo' => 'bar']), $route->getOptions(), '->setOptions() sets the options');
+        $this->assertEquals($route, $route->setOptions([]), '->setOptions() implements a fluent interface');
 
-        $route->setOptions(array('foo' => 'foo'));
-        $route->addOptions(array('bar' => 'bar'));
-        $this->assertEquals($route, $route->addOptions(array()), '->addOptions() implements a fluent interface');
-        $this->assertEquals(array('foo' => 'foo', 'bar' => 'bar', 'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler'), $route->getOptions(), '->addDefaults() keep previous defaults');
+        $route->setOptions(['foo' => 'foo']);
+        $route->addOptions(['bar' => 'bar']);
+        $this->assertEquals($route, $route->addOptions([]), '->addOptions() implements a fluent interface');
+        $this->assertEquals(['foo' => 'foo', 'bar' => 'bar', 'compiler_class' => 'Symfony\\Component\\Routing\\RouteCompiler'], $route->getOptions(), '->addDefaults() keep previous defaults');
     }
 
     public function testOption()
@@ -76,9 +76,9 @@ class RouteTest extends TestCase
     public function testDefaults()
     {
         $route = new Route('/{foo}');
-        $route->setDefaults(array('foo' => 'bar'));
-        $this->assertEquals(array('foo' => 'bar'), $route->getDefaults(), '->setDefaults() sets the defaults');
-        $this->assertEquals($route, $route->setDefaults(array()), '->setDefaults() implements a fluent interface');
+        $route->setDefaults(['foo' => 'bar']);
+        $this->assertEquals(['foo' => 'bar'], $route->getDefaults(), '->setDefaults() sets the defaults');
+        $this->assertEquals($route, $route->setDefaults([]), '->setDefaults() implements a fluent interface');
 
         $route->setDefault('foo', 'bar');
         $this->assertEquals('bar', $route->getDefault('foo'), '->setDefault() sets a default value');
@@ -90,27 +90,27 @@ class RouteTest extends TestCase
         $route->setDefault('_controller', $closure = function () { return 'Hello'; });
         $this->assertEquals($closure, $route->getDefault('_controller'), '->setDefault() sets a default value');
 
-        $route->setDefaults(array('foo' => 'foo'));
-        $route->addDefaults(array('bar' => 'bar'));
-        $this->assertEquals($route, $route->addDefaults(array()), '->addDefaults() implements a fluent interface');
-        $this->assertEquals(array('foo' => 'foo', 'bar' => 'bar'), $route->getDefaults(), '->addDefaults() keep previous defaults');
+        $route->setDefaults(['foo' => 'foo']);
+        $route->addDefaults(['bar' => 'bar']);
+        $this->assertEquals($route, $route->addDefaults([]), '->addDefaults() implements a fluent interface');
+        $this->assertEquals(['foo' => 'foo', 'bar' => 'bar'], $route->getDefaults(), '->addDefaults() keep previous defaults');
     }
 
     public function testRequirements()
     {
         $route = new Route('/{foo}');
-        $route->setRequirements(array('foo' => '\d+'));
-        $this->assertEquals(array('foo' => '\d+'), $route->getRequirements(), '->setRequirements() sets the requirements');
+        $route->setRequirements(['foo' => '\d+']);
+        $this->assertEquals(['foo' => '\d+'], $route->getRequirements(), '->setRequirements() sets the requirements');
         $this->assertEquals('\d+', $route->getRequirement('foo'), '->getRequirement() returns a requirement');
         $this->assertNull($route->getRequirement('bar'), '->getRequirement() returns null if a requirement is not defined');
-        $route->setRequirements(array('foo' => '^\d+$'));
+        $route->setRequirements(['foo' => '^\d+$']);
         $this->assertEquals('\d+', $route->getRequirement('foo'), '->getRequirement() removes ^ and $ from the path');
-        $this->assertEquals($route, $route->setRequirements(array()), '->setRequirements() implements a fluent interface');
+        $this->assertEquals($route, $route->setRequirements([]), '->setRequirements() implements a fluent interface');
 
-        $route->setRequirements(array('foo' => '\d+'));
-        $route->addRequirements(array('bar' => '\d+'));
-        $this->assertEquals($route, $route->addRequirements(array()), '->addRequirements() implements a fluent interface');
-        $this->assertEquals(array('foo' => '\d+', 'bar' => '\d+'), $route->getRequirements(), '->addRequirement() keep previous requirements');
+        $route->setRequirements(['foo' => '\d+']);
+        $route->addRequirements(['bar' => '\d+']);
+        $this->assertEquals($route, $route->addRequirements([]), '->addRequirements() implements a fluent interface');
+        $this->assertEquals(['foo' => '\d+', 'bar' => '\d+'], $route->getRequirements(), '->addRequirement() keep previous requirements');
     }
 
     public function testRequirement()
@@ -134,13 +134,13 @@ class RouteTest extends TestCase
 
     public function getInvalidRequirements()
     {
-        return array(
-           array(''),
-           array(array()),
-           array('^$'),
-           array('^'),
-           array('$'),
-        );
+        return [
+           [''],
+           [[]],
+           ['^$'],
+           ['^'],
+           ['$'],
+        ];
     }
 
     public function testHost()
@@ -153,14 +153,14 @@ class RouteTest extends TestCase
     public function testScheme()
     {
         $route = new Route('/');
-        $this->assertEquals(array(), $route->getSchemes(), 'schemes is initialized with array()');
+        $this->assertEquals([], $route->getSchemes(), 'schemes is initialized with []');
         $this->assertFalse($route->hasScheme('http'));
         $route->setSchemes('hTTp');
-        $this->assertEquals(array('http'), $route->getSchemes(), '->setSchemes() accepts a single scheme string and lowercases it');
+        $this->assertEquals(['http'], $route->getSchemes(), '->setSchemes() accepts a single scheme string and lowercases it');
         $this->assertTrue($route->hasScheme('htTp'));
         $this->assertFalse($route->hasScheme('httpS'));
-        $route->setSchemes(array('HttpS', 'hTTp'));
-        $this->assertEquals(array('https', 'http'), $route->getSchemes(), '->setSchemes() accepts an array of schemes and lowercases them');
+        $route->setSchemes(['HttpS', 'hTTp']);
+        $this->assertEquals(['https', 'http'], $route->getSchemes(), '->setSchemes() accepts an array of schemes and lowercases them');
         $this->assertTrue($route->hasScheme('htTp'));
         $this->assertTrue($route->hasScheme('httpS'));
     }
@@ -168,11 +168,11 @@ class RouteTest extends TestCase
     public function testMethod()
     {
         $route = new Route('/');
-        $this->assertEquals(array(), $route->getMethods(), 'methods is initialized with array()');
+        $this->assertEquals([], $route->getMethods(), 'methods is initialized with []');
         $route->setMethods('gEt');
-        $this->assertEquals(array('GET'), $route->getMethods(), '->setMethods() accepts a single method string and uppercases it');
-        $route->setMethods(array('gEt', 'PosT'));
-        $this->assertEquals(array('GET', 'POST'), $route->getMethods(), '->setMethods() accepts an array of methods and uppercases them');
+        $this->assertEquals(['GET'], $route->getMethods(), '->setMethods() accepts a single method string and uppercases it');
+        $route->setMethods(['gEt', 'PosT']);
+        $this->assertEquals(['GET', 'POST'], $route->getMethods(), '->setMethods() accepts an array of methods and uppercases them');
     }
 
     public function testCondition()
@@ -194,7 +194,7 @@ class RouteTest extends TestCase
 
     public function testSerialize()
     {
-        $route = new Route('/prefix/{foo}', array('foo' => 'default'), array('foo' => '\d+'));
+        $route = new Route('/prefix/{foo}', ['foo' => 'default'], ['foo' => '\d+']);
 
         $serialized = serialize($route);
         $unserialized = unserialize($serialized);
@@ -208,11 +208,11 @@ class RouteTest extends TestCase
         $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', null), new Route('/foo/{bar?}'));
         $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', 'baz'), new Route('/foo/{bar?baz}'));
         $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', 'baz<buz>'), new Route('/foo/{bar?baz<buz>}'));
-        $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', 'baz'), new Route('/foo/{bar?}', array('bar' => 'baz')));
+        $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', 'baz'), new Route('/foo/{bar?}', ['bar' => 'baz']));
 
         $this->assertEquals((new Route('/foo/{bar}'))->setRequirement('bar', '.*'), new Route('/foo/{bar<.*>}'));
         $this->assertEquals((new Route('/foo/{bar}'))->setRequirement('bar', '>'), new Route('/foo/{bar<>>}'));
-        $this->assertEquals((new Route('/foo/{bar}'))->setRequirement('bar', '\d+'), new Route('/foo/{bar<.*>}', array(), array('bar' => '\d+')));
+        $this->assertEquals((new Route('/foo/{bar}'))->setRequirement('bar', '\d+'), new Route('/foo/{bar<.*>}', [], ['bar' => '\d+']));
         $this->assertEquals((new Route('/foo/{bar}'))->setRequirement('bar', '[a-z]{2}'), new Route('/foo/{bar<[a-z]{2}>}'));
 
         $this->assertEquals((new Route('/foo/{bar}'))->setDefault('bar', null)->setRequirement('bar', '.*'), new Route('/foo/{bar<.*>?}'));
@@ -225,7 +225,7 @@ class RouteTest extends TestCase
      */
     public function testSerializeWhenCompiled()
     {
-        $route = new Route('/prefix/{foo}', array('foo' => 'default'), array('foo' => '\d+'));
+        $route = new Route('/prefix/{foo}', ['foo' => 'default'], ['foo' => '\d+']);
         $route->setHost('{locale}.example.net');
         $route->compile();
 
@@ -242,7 +242,7 @@ class RouteTest extends TestCase
      */
     public function testSerializeWhenCompiledWithClass()
     {
-        $route = new Route('/', array(), array(), array('compiler_class' => '\Symfony\Component\Routing\Tests\Fixtures\CustomRouteCompiler'));
+        $route = new Route('/', [], [], ['compiler_class' => '\Symfony\Component\Routing\Tests\Fixtures\CustomRouteCompiler']);
         $this->assertInstanceOf('\Symfony\Component\Routing\Tests\Fixtures\CustomCompiledRoute', $route->compile(), '->compile() returned a proper route');
 
         $serialized = serialize($route);
@@ -264,7 +264,7 @@ class RouteTest extends TestCase
         $serialized = 'C:31:"Symfony\Component\Routing\Route":936:{a:8:{s:4:"path";s:13:"/prefix/{foo}";s:4:"host";s:20:"{locale}.example.net";s:8:"defaults";a:1:{s:3:"foo";s:7:"default";}s:12:"requirements";a:1:{s:3:"foo";s:3:"\d+";}s:7:"options";a:1:{s:14:"compiler_class";s:39:"Symfony\Component\Routing\RouteCompiler";}s:7:"schemes";a:0:{}s:7:"methods";a:0:{}s:8:"compiled";C:39:"Symfony\Component\Routing\CompiledRoute":571:{a:8:{s:4:"vars";a:2:{i:0;s:6:"locale";i:1;s:3:"foo";}s:11:"path_prefix";s:7:"/prefix";s:10:"path_regex";s:31:"#^/prefix(?:/(?P<foo>\d+))?$#sD";s:11:"path_tokens";a:2:{i:0;a:4:{i:0;s:8:"variable";i:1;s:1:"/";i:2;s:3:"\d+";i:3;s:3:"foo";}i:1;a:2:{i:0;s:4:"text";i:1;s:7:"/prefix";}}s:9:"path_vars";a:1:{i:0;s:3:"foo";}s:10:"host_regex";s:40:"#^(?P<locale>[^\.]++)\.example\.net$#sDi";s:11:"host_tokens";a:2:{i:0;a:2:{i:0;s:4:"text";i:1;s:12:".example.net";}i:1;a:4:{i:0;s:8:"variable";i:1;s:0:"";i:2;s:7:"[^\.]++";i:3;s:6:"locale";}}s:9:"host_vars";a:1:{i:0;s:6:"locale";}}}}}';
         $unserialized = unserialize($serialized);
 
-        $route = new Route('/prefix/{foo}', array('foo' => 'default'), array('foo' => '\d+'));
+        $route = new Route('/prefix/{foo}', ['foo' => 'default'], ['foo' => '\d+']);
         $route->setHost('{locale}.example.net');
         $route->compile();
 
diff --git a/src/Symfony/Component/Routing/Tests/RouterTest.php b/src/Symfony/Component/Routing/Tests/RouterTest.php
index e01bd9c610..589ce5403a 100644
--- a/src/Symfony/Component/Routing/Tests/RouterTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouterTest.php
@@ -30,11 +30,11 @@ class RouterTest extends TestCase
 
     public function testSetOptionsWithSupportedOptions()
     {
-        $this->router->setOptions(array(
+        $this->router->setOptions([
             'cache_dir' => './cache',
             'debug' => true,
             'resource_type' => 'ResourceType',
-        ));
+        ]);
 
         $this->assertSame('./cache', $this->router->getOption('cache_dir'));
         $this->assertTrue($this->router->getOption('debug'));
@@ -47,12 +47,12 @@ class RouterTest extends TestCase
      */
     public function testSetOptionsWithUnsupportedOptions()
     {
-        $this->router->setOptions(array(
+        $this->router->setOptions([
             'cache_dir' => './cache',
             'option_foo' => true,
             'option_bar' => 'baz',
             'resource_type' => 'ResourceType',
-        ));
+        ]);
     }
 
     public function testSetOptionWithSupportedOption()
@@ -109,10 +109,10 @@ class RouterTest extends TestCase
 
     public function provideMatcherOptionsPreventingCaching()
     {
-        return array(
-            array('cache_dir'),
-            array('matcher_cache_class'),
-        );
+        return [
+            ['cache_dir'],
+            ['matcher_cache_class'],
+        ];
     }
 
     /**
@@ -131,10 +131,10 @@ class RouterTest extends TestCase
 
     public function provideGeneratorOptionsPreventingCaching()
     {
-        return array(
-            array('cache_dir'),
-            array('generator_cache_class'),
-        );
+        return [
+            ['cache_dir'],
+            ['generator_cache_class'],
+        ];
     }
 
     public function testMatchRequestWithUrlMatcherInterface()
diff --git a/src/Symfony/Component/Security/Core/Authentication/RememberMe/InMemoryTokenProvider.php b/src/Symfony/Component/Security/Core/Authentication/RememberMe/InMemoryTokenProvider.php
index 719d7a16d8..71e3b6a8af 100644
--- a/src/Symfony/Component/Security/Core/Authentication/RememberMe/InMemoryTokenProvider.php
+++ b/src/Symfony/Component/Security/Core/Authentication/RememberMe/InMemoryTokenProvider.php
@@ -20,7 +20,7 @@ use Symfony\Component\Security\Core\Exception\TokenNotFoundException;
  */
 class InMemoryTokenProvider implements TokenProviderInterface
 {
-    private $tokens = array();
+    private $tokens = [];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
index 29712cfef2..ad718a23d3 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/AbstractToken.php
@@ -25,16 +25,16 @@ use Symfony\Component\Security\Core\User\UserInterface;
 abstract class AbstractToken implements TokenInterface
 {
     private $user;
-    private $roles = array();
+    private $roles = [];
     private $authenticated = false;
-    private $attributes = array();
+    private $attributes = [];
 
     /**
      * @param (Role|string)[] $roles An array of roles
      *
      * @throws \InvalidArgumentException
      */
-    public function __construct(array $roles = array())
+    public function __construct(array $roles = [])
     {
         foreach ($roles as $role) {
             if (\is_string($role)) {
@@ -137,12 +137,12 @@ abstract class AbstractToken implements TokenInterface
     public function serialize()
     {
         return serialize(
-            array(
+            [
                 \is_object($this->user) ? clone $this->user : $this->user,
                 $this->authenticated,
                 array_map(function ($role) { return clone $role; }, $this->roles),
                 $this->attributes,
-            )
+            ]
         );
     }
 
@@ -223,7 +223,7 @@ abstract class AbstractToken implements TokenInterface
         $class = \get_class($this);
         $class = substr($class, strrpos($class, '\\') + 1);
 
-        $roles = array();
+        $roles = [];
         foreach ($this->roles as $role) {
             $roles[] = $role->getRole();
         }
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/AnonymousToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/AnonymousToken.php
index fdeba46f97..59688ba26c 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/AnonymousToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/AnonymousToken.php
@@ -27,7 +27,7 @@ class AnonymousToken extends AbstractToken
      * @param string|object $user   The user can be a UserInterface instance, or an object implementing a __toString method or the username as a regular string
      * @param Role[]        $roles  An array of roles
      */
-    public function __construct(string $secret, $user, array $roles = array())
+    public function __construct(string $secret, $user, array $roles = [])
     {
         parent::__construct($roles);
 
@@ -59,7 +59,7 @@ class AnonymousToken extends AbstractToken
      */
     public function serialize()
     {
-        return serialize(array($this->secret, parent::serialize()));
+        return serialize([$this->secret, parent::serialize()]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/PreAuthenticatedToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/PreAuthenticatedToken.php
index 662135a851..ede09cb3f7 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/PreAuthenticatedToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/PreAuthenticatedToken.php
@@ -29,7 +29,7 @@ class PreAuthenticatedToken extends AbstractToken
      * @param string          $providerKey The provider key
      * @param (Role|string)[] $roles       An array of roles
      */
-    public function __construct($user, $credentials, string $providerKey, array $roles = array())
+    public function __construct($user, $credentials, string $providerKey, array $roles = [])
     {
         parent::__construct($roles);
 
@@ -79,7 +79,7 @@ class PreAuthenticatedToken extends AbstractToken
      */
     public function serialize()
     {
-        return serialize(array($this->credentials, $this->providerKey, parent::serialize()));
+        return serialize([$this->credentials, $this->providerKey, parent::serialize()]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/RememberMeToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/RememberMeToken.php
index 6579668f50..39c03d13d4 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/RememberMeToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/RememberMeToken.php
@@ -94,11 +94,11 @@ class RememberMeToken extends AbstractToken
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             $this->secret,
             $this->providerKey,
             parent::serialize(),
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php b/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
index fb1cdf8002..c1e95d479e 100644
--- a/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
+++ b/src/Symfony/Component/Security/Core/Authentication/Token/UsernamePasswordToken.php
@@ -31,7 +31,7 @@ class UsernamePasswordToken extends AbstractToken
      *
      * @throws \InvalidArgumentException
      */
-    public function __construct($user, $credentials, string $providerKey, array $roles = array())
+    public function __construct($user, $credentials, string $providerKey, array $roles = [])
     {
         parent::__construct($roles);
 
@@ -91,7 +91,7 @@ class UsernamePasswordToken extends AbstractToken
      */
     public function serialize()
     {
-        return serialize(array($this->credentials, $this->providerKey, parent::serialize()));
+        return serialize([$this->credentials, $this->providerKey, parent::serialize()]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php b/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
index 631ff8fbf1..058085e349 100644
--- a/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
+++ b/src/Symfony/Component/Security/Core/Authorization/AccessDecisionManager.php
@@ -39,10 +39,10 @@ class AccessDecisionManager implements AccessDecisionManagerInterface
      *
      * @throws \InvalidArgumentException
      */
-    public function __construct(iterable $voters = array(), string $strategy = self::STRATEGY_AFFIRMATIVE, bool $allowIfAllAbstainDecisions = false, bool $allowIfEqualGrantedDeniedDecisions = true)
+    public function __construct(iterable $voters = [], string $strategy = self::STRATEGY_AFFIRMATIVE, bool $allowIfAllAbstainDecisions = false, bool $allowIfEqualGrantedDeniedDecisions = true)
     {
         $strategyMethod = 'decide'.ucfirst($strategy);
-        if (!\is_callable(array($this, $strategyMethod))) {
+        if (!\is_callable([$this, $strategyMethod])) {
             throw new \InvalidArgumentException(sprintf('The strategy "%s" is not supported.', $strategy));
         }
 
@@ -152,7 +152,7 @@ class AccessDecisionManager implements AccessDecisionManagerInterface
         $grant = 0;
         foreach ($this->voters as $voter) {
             foreach ($attributes as $attribute) {
-                $result = $voter->vote($token, $object, array($attribute));
+                $result = $voter->vote($token, $object, [$attribute]);
 
                 switch ($result) {
                     case VoterInterface::ACCESS_GRANTED:
diff --git a/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php b/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
index 67c6de34b9..db30095743 100644
--- a/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
+++ b/src/Symfony/Component/Security/Core/Authorization/AuthorizationChecker.php
@@ -54,7 +54,7 @@ class AuthorizationChecker implements AuthorizationCheckerInterface
         }
 
         if (!\is_array($attributes)) {
-            $attributes = array($attributes);
+            $attributes = [$attributes];
         }
 
         return $this->accessDecisionManager->decide($token, $attributes, $subject);
diff --git a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
index 5cf02c6bf0..ca15a40425 100644
--- a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
+++ b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguage.php
@@ -29,7 +29,7 @@ if (!class_exists(BaseExpressionLanguage::class)) {
         /**
          * {@inheritdoc}
          */
-        public function __construct(CacheItemPoolInterface $cache = null, array $providers = array())
+        public function __construct(CacheItemPoolInterface $cache = null, array $providers = [])
         {
             // prepend the default provider to let users override it easily
             array_unshift($providers, new ExpressionLanguageProvider());
diff --git a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
index 986c23e2ab..029c96db8f 100644
--- a/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
+++ b/src/Symfony/Component/Security/Core/Authorization/ExpressionLanguageProvider.php
@@ -23,7 +23,7 @@ class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
 {
     public function getFunctions()
     {
-        return array(
+        return [
             new ExpressionFunction('is_anonymous', function () {
                 return '$trust_resolver->isAnonymous($token)';
             }, function (array $variables) {
@@ -63,6 +63,6 @@ class ExpressionLanguageProvider implements ExpressionFunctionProviderInterface
 
                 return \in_array($role, $variables['roles']);
             }),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Authorization/TraceableAccessDecisionManager.php b/src/Symfony/Component/Security/Core/Authorization/TraceableAccessDecisionManager.php
index e435ba3d1a..319d2d866c 100644
--- a/src/Symfony/Component/Security/Core/Authorization/TraceableAccessDecisionManager.php
+++ b/src/Symfony/Component/Security/Core/Authorization/TraceableAccessDecisionManager.php
@@ -26,9 +26,9 @@ class TraceableAccessDecisionManager implements AccessDecisionManagerInterface
 {
     private $manager;
     private $strategy;
-    private $voters = array();
-    private $decisionLog = array(); // All decision logs
-    private $currentLog = array();  // Logs being filled in
+    private $voters = [];
+    private $decisionLog = []; // All decision logs
+    private $currentLog = [];  // Logs being filled in
 
     public function __construct(AccessDecisionManagerInterface $manager)
     {
@@ -50,11 +50,11 @@ class TraceableAccessDecisionManager implements AccessDecisionManagerInterface
      */
     public function decide(TokenInterface $token, array $attributes, $object = null)
     {
-        $currentDecisionLog = array(
+        $currentDecisionLog = [
             'attributes' => $attributes,
             'object' => $object,
-            'voterDetails' => array(),
-        );
+            'voterDetails' => [],
+        ];
 
         $this->currentLog[] = &$currentDecisionLog;
 
@@ -77,11 +77,11 @@ class TraceableAccessDecisionManager implements AccessDecisionManagerInterface
     public function addVoterVote(VoterInterface $voter, array $attributes, int $vote)
     {
         $currentLogIndex = \count($this->currentLog) - 1;
-        $this->currentLog[$currentLogIndex]['voterDetails'][] = array(
+        $this->currentLog[$currentLogIndex]['voterDetails'][] = [
             'voter' => $voter,
             'attributes' => $attributes,
             'vote' => $vote,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php b/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
index 131f5efe20..d9530e071c 100644
--- a/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
+++ b/src/Symfony/Component/Security/Core/Authorization/Voter/ExpressionVoter.php
@@ -96,7 +96,7 @@ class ExpressionVoter implements VoterInterface
             $roles = $token->getRoles();
         }
 
-        $variables = array(
+        $variables = [
             'token' => $token,
             'user' => $token->getUser(),
             'object' => $subject,
@@ -104,7 +104,7 @@ class ExpressionVoter implements VoterInterface
             'roles' => array_map(function ($role) { return $role->getRole(); }, $roles),
             'trust_resolver' => $this->trustResolver,
             'auth_checker' => $this->authChecker,
-        );
+        ];
 
         // this is mainly to propose a better experience when the expression is used
         // in an access control rule, as the developer does not know that it's going
diff --git a/src/Symfony/Component/Security/Core/Encoder/Argon2iPasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/Argon2iPasswordEncoder.php
index 195fad6a23..e91fdced86 100644
--- a/src/Symfony/Component/Security/Core/Encoder/Argon2iPasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/Argon2iPasswordEncoder.php
@@ -21,7 +21,7 @@ use Symfony\Component\Security\Core\Exception\BadCredentialsException;
  */
 class Argon2iPasswordEncoder extends BasePasswordEncoder implements SelfSaltingEncoderInterface
 {
-    private $config = array();
+    private $config = [];
 
     /**
      * Argon2iPasswordEncoder constructor.
@@ -33,11 +33,11 @@ class Argon2iPasswordEncoder extends BasePasswordEncoder implements SelfSaltingE
     public function __construct(int $memoryCost = null, int $timeCost = null, int $threads = null)
     {
         if (\defined('PASSWORD_ARGON2I')) {
-            $this->config = array(
+            $this->config = [
                 'memory_cost' => $memoryCost ?? \PASSWORD_ARGON2_DEFAULT_MEMORY_COST,
                 'time_cost' => $timeCost ?? \PASSWORD_ARGON2_DEFAULT_TIME_COST,
                 'threads' => $threads ?? \PASSWORD_ARGON2_DEFAULT_THREADS,
-            );
+            ];
         }
     }
 
diff --git a/src/Symfony/Component/Security/Core/Encoder/BCryptPasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/BCryptPasswordEncoder.php
index 67e0ce7a07..7855552af6 100644
--- a/src/Symfony/Component/Security/Core/Encoder/BCryptPasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/BCryptPasswordEncoder.php
@@ -64,7 +64,7 @@ class BCryptPasswordEncoder extends BasePasswordEncoder implements SelfSaltingEn
             throw new BadCredentialsException('Invalid password.');
         }
 
-        $options = array('cost' => $this->cost);
+        $options = ['cost' => $this->cost];
 
         if ($salt) {
             // Ignore $salt, the auto-generated one is always the best
diff --git a/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php b/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
index 75c4db896f..3c3ea1aa17 100644
--- a/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
+++ b/src/Symfony/Component/Security/Core/Encoder/BasePasswordEncoder.php
@@ -30,7 +30,7 @@ abstract class BasePasswordEncoder implements PasswordEncoderInterface
     protected function demergePasswordAndSalt($mergedPasswordSalt)
     {
         if (empty($mergedPasswordSalt)) {
-            return array('', '');
+            return ['', ''];
         }
 
         $password = $mergedPasswordSalt;
@@ -42,7 +42,7 @@ abstract class BasePasswordEncoder implements PasswordEncoderInterface
             $password = substr($mergedPasswordSalt, 0, $saltBegins);
         }
 
-        return array($password, $salt);
+        return [$password, $salt];
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php b/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
index 4885b792ba..a774d7e11c 100644
--- a/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
+++ b/src/Symfony/Component/Security/Core/Encoder/EncoderFactory.php
@@ -86,46 +86,46 @@ class EncoderFactory implements EncoderFactoryInterface
     {
         switch ($config['algorithm']) {
             case 'plaintext':
-                return array(
+                return [
                     'class' => PlaintextPasswordEncoder::class,
-                    'arguments' => array($config['ignore_case']),
-                );
+                    'arguments' => [$config['ignore_case']],
+                ];
 
             case 'pbkdf2':
-                return array(
+                return [
                     'class' => Pbkdf2PasswordEncoder::class,
-                    'arguments' => array(
+                    'arguments' => [
                         $config['hash_algorithm'],
                         $config['encode_as_base64'],
                         $config['iterations'],
                         $config['key_length'],
-                    ),
-                );
+                    ],
+                ];
 
             case 'bcrypt':
-                return array(
+                return [
                     'class' => BCryptPasswordEncoder::class,
-                    'arguments' => array($config['cost']),
-                );
+                    'arguments' => [$config['cost']],
+                ];
 
             case 'argon2i':
-                return array(
+                return [
                     'class' => Argon2iPasswordEncoder::class,
-                    'arguments' => array(
+                    'arguments' => [
                         $config['memory_cost'],
                         $config['time_cost'],
                         $config['threads'],
-                    ),
-                );
+                    ],
+                ];
         }
 
-        return array(
+        return [
             'class' => MessageDigestPasswordEncoder::class,
-            'arguments' => array(
+            'arguments' => [
                 $config['algorithm'],
                 $config['encode_as_base64'],
                 $config['iterations'],
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Exception/AccessDeniedException.php b/src/Symfony/Component/Security/Core/Exception/AccessDeniedException.php
index c4eebcb7a4..c8e7f7b8ee 100644
--- a/src/Symfony/Component/Security/Core/Exception/AccessDeniedException.php
+++ b/src/Symfony/Component/Security/Core/Exception/AccessDeniedException.php
@@ -18,7 +18,7 @@ namespace Symfony\Component\Security\Core\Exception;
  */
 class AccessDeniedException extends RuntimeException
 {
-    private $attributes = array();
+    private $attributes = [];
     private $subject;
 
     public function __construct(string $message = 'Access Denied.', \Exception $previous = null)
diff --git a/src/Symfony/Component/Security/Core/Exception/AccountStatusException.php b/src/Symfony/Component/Security/Core/Exception/AccountStatusException.php
index 034ab792ee..503d3fbad4 100644
--- a/src/Symfony/Component/Security/Core/Exception/AccountStatusException.php
+++ b/src/Symfony/Component/Security/Core/Exception/AccountStatusException.php
@@ -44,10 +44,10 @@ abstract class AccountStatusException extends AuthenticationException
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             $this->user,
             parent::serialize(),
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Exception/AuthenticationException.php b/src/Symfony/Component/Security/Core/Exception/AuthenticationException.php
index 3abcd862cc..d7fb6b88f3 100644
--- a/src/Symfony/Component/Security/Core/Exception/AuthenticationException.php
+++ b/src/Symfony/Component/Security/Core/Exception/AuthenticationException.php
@@ -40,13 +40,13 @@ class AuthenticationException extends RuntimeException implements \Serializable
 
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             $this->token,
             $this->code,
             $this->message,
             $this->file,
             $this->line,
-        ));
+        ]);
     }
 
     public function unserialize($str)
@@ -77,6 +77,6 @@ class AuthenticationException extends RuntimeException implements \Serializable
      */
     public function getMessageData()
     {
-        return array();
+        return [];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Exception/CustomUserMessageAuthenticationException.php b/src/Symfony/Component/Security/Core/Exception/CustomUserMessageAuthenticationException.php
index 2b9a00ebe3..bc9d88e43a 100644
--- a/src/Symfony/Component/Security/Core/Exception/CustomUserMessageAuthenticationException.php
+++ b/src/Symfony/Component/Security/Core/Exception/CustomUserMessageAuthenticationException.php
@@ -24,9 +24,9 @@ class CustomUserMessageAuthenticationException extends AuthenticationException
 {
     private $messageKey;
 
-    private $messageData = array();
+    private $messageData = [];
 
-    public function __construct(string $message = '', array $messageData = array(), int $code = 0, \Exception $previous = null)
+    public function __construct(string $message = '', array $messageData = [], int $code = 0, \Exception $previous = null)
     {
         parent::__construct($message, $code, $previous);
 
@@ -39,7 +39,7 @@ class CustomUserMessageAuthenticationException extends AuthenticationException
      * @param string $messageKey  The message or message key
      * @param array  $messageData Data to be passed into the translator
      */
-    public function setSafeMessage($messageKey, array $messageData = array())
+    public function setSafeMessage($messageKey, array $messageData = [])
     {
         $this->messageKey = $messageKey;
         $this->messageData = $messageData;
@@ -60,11 +60,11 @@ class CustomUserMessageAuthenticationException extends AuthenticationException
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             parent::serialize(),
             $this->messageKey,
             $this->messageData,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Exception/UsernameNotFoundException.php b/src/Symfony/Component/Security/Core/Exception/UsernameNotFoundException.php
index 6979389a05..6549307eee 100644
--- a/src/Symfony/Component/Security/Core/Exception/UsernameNotFoundException.php
+++ b/src/Symfony/Component/Security/Core/Exception/UsernameNotFoundException.php
@@ -54,10 +54,10 @@ class UsernameNotFoundException extends AuthenticationException
      */
     public function serialize()
     {
-        return serialize(array(
+        return serialize([
             $this->username,
             parent::serialize(),
-        ));
+        ]);
     }
 
     /**
@@ -75,6 +75,6 @@ class UsernameNotFoundException extends AuthenticationException
      */
     public function getMessageData()
     {
-        return array('{{ username }}' => $this->username);
+        return ['{{ username }}' => $this->username];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Role/RoleHierarchy.php b/src/Symfony/Component/Security/Core/Role/RoleHierarchy.php
index ff487f2523..f4a2e5b622 100644
--- a/src/Symfony/Component/Security/Core/Role/RoleHierarchy.php
+++ b/src/Symfony/Component/Security/Core/Role/RoleHierarchy.php
@@ -52,10 +52,10 @@ class RoleHierarchy implements RoleHierarchyInterface
 
     protected function buildRoleMap()
     {
-        $this->map = array();
+        $this->map = [];
         foreach ($this->hierarchy as $main => $roles) {
             $this->map[$main] = $roles;
-            $visited = array();
+            $visited = [];
             $additionalRoles = $roles;
             while ($role = array_shift($additionalRoles)) {
                 if (!isset($this->hierarchy[$role])) {
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
index 0f82d3ce34..fd2de0ca25 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationProviderManagerTest.php
@@ -29,7 +29,7 @@ class AuthenticationProviderManagerTest extends TestCase
      */
     public function testAuthenticateWithoutProviders()
     {
-        new AuthenticationProviderManager(array());
+        new AuthenticationProviderManager([]);
     }
 
     /**
@@ -37,16 +37,16 @@ class AuthenticationProviderManagerTest extends TestCase
      */
     public function testAuthenticateWithProvidersWithIncorrectInterface()
     {
-        (new AuthenticationProviderManager(array(
+        (new AuthenticationProviderManager([
             new \stdClass(),
-        )))->authenticate($this->getMockBuilder(TokenInterface::class)->getMock());
+        ]))->authenticate($this->getMockBuilder(TokenInterface::class)->getMock());
     }
 
     public function testAuthenticateWhenNoProviderSupportsToken()
     {
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(false),
-        ));
+        ]);
 
         try {
             $manager->authenticate($token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
@@ -58,9 +58,9 @@ class AuthenticationProviderManagerTest extends TestCase
 
     public function testAuthenticateWhenProviderReturnsAccountStatusException()
     {
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, null, 'Symfony\Component\Security\Core\Exception\AccountStatusException'),
-        ));
+        ]);
 
         try {
             $manager->authenticate($token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
@@ -72,9 +72,9 @@ class AuthenticationProviderManagerTest extends TestCase
 
     public function testAuthenticateWhenProviderReturnsAuthenticationException()
     {
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, null, 'Symfony\Component\Security\Core\Exception\AuthenticationException'),
-        ));
+        ]);
 
         try {
             $manager->authenticate($token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
@@ -86,10 +86,10 @@ class AuthenticationProviderManagerTest extends TestCase
 
     public function testAuthenticateWhenOneReturnsAuthenticationExceptionButNotAll()
     {
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, null, 'Symfony\Component\Security\Core\Exception\AuthenticationException'),
             $this->getAuthenticationProvider(true, $expected = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()),
-        ));
+        ]);
 
         $token = $manager->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
         $this->assertSame($expected, $token);
@@ -102,10 +102,10 @@ class AuthenticationProviderManagerTest extends TestCase
             ->expects($this->never())
             ->method('supports')
         ;
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, $expected = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()),
             $second,
-        ));
+        ]);
 
         $token = $manager->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
         $this->assertSame($expected, $token);
@@ -113,16 +113,16 @@ class AuthenticationProviderManagerTest extends TestCase
 
     public function testEraseCredentialFlag()
     {
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, $token = new UsernamePasswordToken('foo', 'bar', 'key')),
-        ));
+        ]);
 
         $token = $manager->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
         $this->assertEquals('', $token->getCredentials());
 
-        $manager = new AuthenticationProviderManager(array(
+        $manager = new AuthenticationProviderManager([
             $this->getAuthenticationProvider(true, $token = new UsernamePasswordToken('foo', 'bar', 'key')),
-        ), false);
+        ], false);
 
         $token = $manager->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
         $this->assertEquals('bar', $token->getCredentials());
@@ -141,7 +141,7 @@ class AuthenticationProviderManagerTest extends TestCase
             ->method('dispatch')
             ->with(AuthenticationEvents::AUTHENTICATION_FAILURE, $this->equalTo(new AuthenticationFailureEvent($token, $exception)));
 
-        $manager = new AuthenticationProviderManager(array($provider));
+        $manager = new AuthenticationProviderManager([$provider]);
         $manager->setEventDispatcher($dispatcher);
 
         try {
@@ -166,7 +166,7 @@ class AuthenticationProviderManagerTest extends TestCase
             ->method('dispatch')
             ->with(AuthenticationEvents::AUTHENTICATION_SUCCESS, $this->equalTo(new AuthenticationEvent($token)));
 
-        $manager = new AuthenticationProviderManager(array($provider));
+        $manager = new AuthenticationProviderManager([$provider]);
         $manager->setEventDispatcher($dispatcher);
 
         $this->assertSame($token, $manager->authenticate($token));
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
index fb5a885161..f55f161476 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/AuthenticationTrustResolverTest.php
@@ -129,12 +129,12 @@ class AuthenticationTrustResolverTest extends TestCase
 
     protected function getAnonymousToken()
     {
-        return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setConstructorArgs(array('', ''))->getMock();
+        return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setConstructorArgs(['', ''])->getMock();
     }
 
     protected function getRememberMeToken()
     {
-        return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(array('setPersistent'))->disableOriginalConstructor()->getMock();
+        return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(['setPersistent'])->disableOriginalConstructor()->getMock();
     }
 
     protected function getResolver()
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
index e6c0f6853a..92441ba5fc 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php
@@ -55,7 +55,7 @@ class AnonymousAuthenticationProviderTest extends TestCase
 
     protected function getSupportedToken($secret)
     {
-        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setMethods(array('getSecret'))->disableOriginalConstructor()->getMock();
+        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setMethods(['getSecret'])->disableOriginalConstructor()->getMock();
         $token->expects($this->any())
               ->method('getSecret')
               ->will($this->returnValue($secret))
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
index b657925343..55814a994c 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/DaoAuthenticationProviderTest.php
@@ -261,7 +261,7 @@ class DaoAuthenticationProviderTest extends TestCase
 
     protected function getSupportedToken()
     {
-        $mock = $this->getMockBuilder('Symfony\\Component\\Security\\Core\\Authentication\\Token\\UsernamePasswordToken')->setMethods(array('getCredentials', 'getUser', 'getProviderKey'))->disableOriginalConstructor()->getMock();
+        $mock = $this->getMockBuilder('Symfony\\Component\\Security\\Core\\Authentication\\Token\\UsernamePasswordToken')->setMethods(['getCredentials', 'getUser', 'getProviderKey'])->disableOriginalConstructor()->getMock();
         $mock
             ->expects($this->any())
             ->method('getProviderKey')
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
index 7897a5bf0a..ef19bc2c32 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/LdapBindAuthenticationProviderTest.php
@@ -107,7 +107,7 @@ class LdapBindAuthenticationProviderTest extends TestCase
     {
         $userProvider = $this->getMockBuilder(UserProviderInterface::class)->getMock();
 
-        $collection = new \ArrayIterator(array(new Entry('')));
+        $collection = new \ArrayIterator([new Entry('')]);
 
         $query = $this->getMockBuilder(QueryInterface::class)->getMock();
         $query
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
index 8f19a8d18e..a101208d68 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php
@@ -62,7 +62,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
         $user
             ->expects($this->once())
             ->method('getRoles')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
         $provider = $this->getProvider($user);
 
@@ -70,8 +70,8 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
         $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken', $token);
         $this->assertEquals('pass', $token->getCredentials());
         $this->assertEquals('key', $token->getProviderKey());
-        $this->assertEquals(array(), $token->getRoles());
-        $this->assertEquals(array('foo' => 'bar'), $token->getAttributes(), '->authenticate() copies token attributes');
+        $this->assertEquals([], $token->getRoles());
+        $this->assertEquals(['foo' => 'bar'], $token->getAttributes(), '->authenticate() copies token attributes');
         $this->assertSame($user, $token->getUser());
     }
 
@@ -95,7 +95,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
 
     protected function getSupportedToken($user = false, $credentials = false)
     {
-        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken')->setMethods(array('getUser', 'getCredentials', 'getProviderKey'))->disableOriginalConstructor()->getMock();
+        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken')->setMethods(['getUser', 'getCredentials', 'getProviderKey'])->disableOriginalConstructor()->getMock();
         if (false !== $user) {
             $token->expects($this->once())
                   ->method('getUser')
@@ -115,7 +115,7 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
             ->will($this->returnValue('key'))
         ;
 
-        $token->setAttributes(array('foo' => 'bar'));
+        $token->setAttributes(['foo' => 'bar']);
 
         return $token;
     }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
index 1b98a7d9d9..26287693d6 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php
@@ -69,7 +69,7 @@ class RememberMeAuthenticationProviderTest extends TestCase
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $user->expects($this->exactly(2))
              ->method('getRoles')
-             ->will($this->returnValue(array('ROLE_FOO')));
+             ->will($this->returnValue(['ROLE_FOO']));
 
         $provider = $this->getProvider();
 
@@ -78,7 +78,7 @@ class RememberMeAuthenticationProviderTest extends TestCase
 
         $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken', $authToken);
         $this->assertSame($user, $authToken->getUser());
-        $this->assertEquals(array(new Role('ROLE_FOO')), $authToken->getRoles());
+        $this->assertEquals([new Role('ROLE_FOO')], $authToken->getRoles());
         $this->assertEquals('', $authToken->getCredentials());
     }
 
@@ -89,10 +89,10 @@ class RememberMeAuthenticationProviderTest extends TestCase
             $user
                 ->expects($this->any())
                 ->method('getRoles')
-                ->will($this->returnValue(array()));
+                ->will($this->returnValue([]));
         }
 
-        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(array('getProviderKey'))->setConstructorArgs(array($user, 'foo', $secret))->getMock();
+        $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(['getProviderKey'])->setConstructorArgs([$user, 'foo', $secret])->getMock();
         $token
             ->expects($this->once())
             ->method('getProviderKey')
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
index e861a20094..7c306d2f1f 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php
@@ -165,7 +165,7 @@ class UserAuthenticationProviderTest extends TestCase
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $user->expects($this->once())
              ->method('getRoles')
-             ->will($this->returnValue(array('ROLE_FOO')))
+             ->will($this->returnValue(['ROLE_FOO']))
         ;
 
         $provider = $this->getProvider();
@@ -182,16 +182,16 @@ class UserAuthenticationProviderTest extends TestCase
 
         $token->expects($this->once())
               ->method('getRoles')
-              ->will($this->returnValue(array()))
+              ->will($this->returnValue([]))
         ;
 
         $authToken = $provider->authenticate($token);
 
         $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', $authToken);
         $this->assertSame($user, $authToken->getUser());
-        $this->assertEquals(array(new Role('ROLE_FOO')), $authToken->getRoles());
+        $this->assertEquals([new Role('ROLE_FOO')], $authToken->getRoles());
         $this->assertEquals('foo', $authToken->getCredentials());
-        $this->assertEquals(array('foo' => 'bar'), $authToken->getAttributes(), '->authenticate() copies token attributes');
+        $this->assertEquals(['foo' => 'bar'], $authToken->getAttributes(), '->authenticate() copies token attributes');
     }
 
     public function testAuthenticateWithPreservingRoleSwitchUserRole()
@@ -199,7 +199,7 @@ class UserAuthenticationProviderTest extends TestCase
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $user->expects($this->once())
              ->method('getRoles')
-             ->will($this->returnValue(array('ROLE_FOO')))
+             ->will($this->returnValue(['ROLE_FOO']))
         ;
 
         $provider = $this->getProvider();
@@ -217,7 +217,7 @@ class UserAuthenticationProviderTest extends TestCase
         $switchUserRole = new SwitchUserRole('foo', $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
         $token->expects($this->once())
               ->method('getRoles')
-              ->will($this->returnValue(array($switchUserRole)))
+              ->will($this->returnValue([$switchUserRole]))
         ;
 
         $authToken = $provider->authenticate($token);
@@ -227,19 +227,19 @@ class UserAuthenticationProviderTest extends TestCase
         $this->assertContains(new Role('ROLE_FOO'), $authToken->getRoles(), '', false, false);
         $this->assertContains($switchUserRole, $authToken->getRoles(), '', false, false);
         $this->assertEquals('foo', $authToken->getCredentials());
-        $this->assertEquals(array('foo' => 'bar'), $authToken->getAttributes(), '->authenticate() copies token attributes');
+        $this->assertEquals(['foo' => 'bar'], $authToken->getAttributes(), '->authenticate() copies token attributes');
     }
 
     protected function getSupportedToken()
     {
-        $mock = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken')->setMethods(array('getCredentials', 'getProviderKey', 'getRoles'))->disableOriginalConstructor()->getMock();
+        $mock = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken')->setMethods(['getCredentials', 'getProviderKey', 'getRoles'])->disableOriginalConstructor()->getMock();
         $mock
             ->expects($this->any())
             ->method('getProviderKey')
             ->will($this->returnValue('key'))
         ;
 
-        $mock->setAttributes(array('foo' => 'bar'));
+        $mock->setAttributes(['foo' => 'bar']);
 
         return $mock;
     }
@@ -250,6 +250,6 @@ class UserAuthenticationProviderTest extends TestCase
             $userChecker = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserCheckerInterface')->getMock();
         }
 
-        return $this->getMockForAbstractClass('Symfony\Component\Security\Core\Authentication\Provider\UserAuthenticationProvider', array($userChecker, 'key', $hide));
+        return $this->getMockForAbstractClass('Symfony\Component\Security\Core\Authentication\Provider\UserAuthenticationProvider', [$userChecker, 'key', $hide]);
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
index c6576512a6..0c50061513 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AbstractTokenTest.php
@@ -36,7 +36,7 @@ class ConcreteToken extends AbstractToken
 {
     private $credentials = 'credentials_value';
 
-    public function __construct($user, array $roles = array())
+    public function __construct($user, array $roles = [])
     {
         parent::__construct($roles);
 
@@ -45,7 +45,7 @@ class ConcreteToken extends AbstractToken
 
     public function serialize()
     {
-        return serialize(array($this->credentials, parent::serialize()));
+        return serialize([$this->credentials, parent::serialize()]);
     }
 
     public function unserialize($serialized)
@@ -63,7 +63,7 @@ class AbstractTokenTest extends TestCase
 {
     public function testGetUsername()
     {
-        $token = $this->getToken(array('ROLE_FOO'));
+        $token = $this->getToken(['ROLE_FOO']);
         $token->setUser('fabien');
         $this->assertEquals('fabien', $token->getUsername());
 
@@ -78,7 +78,7 @@ class AbstractTokenTest extends TestCase
 
     public function testEraseCredentials()
     {
-        $token = $this->getToken(array('ROLE_FOO'));
+        $token = $this->getToken(['ROLE_FOO']);
 
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $user->expects($this->once())->method('eraseCredentials');
@@ -89,8 +89,8 @@ class AbstractTokenTest extends TestCase
 
     public function testSerialize()
     {
-        $token = $this->getToken(array('ROLE_FOO', new Role('ROLE_BAR')));
-        $token->setAttributes(array('foo' => 'bar'));
+        $token = $this->getToken(['ROLE_FOO', new Role('ROLE_BAR')]);
+        $token->setAttributes(['foo' => 'bar']);
 
         $uToken = unserialize(serialize($token));
 
@@ -100,7 +100,7 @@ class AbstractTokenTest extends TestCase
 
     public function testSerializeWithRoleObjects()
     {
-        $user = new User('name', 'password', array(new Role('ROLE_FOO'), new Role('ROLE_BAR')));
+        $user = new User('name', 'password', [new Role('ROLE_FOO'), new Role('ROLE_BAR')]);
         $token = new ConcreteToken($user, $user->getRoles());
 
         $serialized = serialize($token);
@@ -114,9 +114,9 @@ class AbstractTokenTest extends TestCase
     public function testSerializeParent()
     {
         $user = new TestUser('fabien');
-        $token = new ConcreteToken($user, array('ROLE_FOO'));
+        $token = new ConcreteToken($user, ['ROLE_FOO']);
 
-        $parentToken = new ConcreteToken($user, array(new SwitchUserRole('ROLE_PREVIOUS', $token)));
+        $parentToken = new ConcreteToken($user, [new SwitchUserRole('ROLE_PREVIOUS', $token)]);
         $uToken = unserialize(serialize($parentToken));
 
         $this->assertEquals(
@@ -127,14 +127,14 @@ class AbstractTokenTest extends TestCase
 
     public function testConstructor()
     {
-        $token = $this->getToken(array('ROLE_FOO'));
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $token = $this->getToken(['ROLE_FOO']);
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
 
-        $token = $this->getToken(array(new Role('ROLE_FOO')));
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $token = $this->getToken([new Role('ROLE_FOO')]);
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
 
-        $token = $this->getToken(array(new Role('ROLE_FOO'), 'ROLE_BAR'));
-        $this->assertEquals(array(new Role('ROLE_FOO'), new Role('ROLE_BAR')), $token->getRoles());
+        $token = $this->getToken([new Role('ROLE_FOO'), 'ROLE_BAR']);
+        $this->assertEquals([new Role('ROLE_FOO'), new Role('ROLE_BAR')], $token->getRoles());
     }
 
     public function testAuthenticatedFlag()
@@ -151,7 +151,7 @@ class AbstractTokenTest extends TestCase
 
     public function testAttributes()
     {
-        $attributes = array('foo' => 'bar');
+        $attributes = ['foo' => 'bar'];
         $token = $this->getToken();
         $token->setAttributes($attributes);
 
@@ -185,11 +185,11 @@ class AbstractTokenTest extends TestCase
     {
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
 
-        return array(
-            array($user),
-            array(new TestUser('foo')),
-            array('foo'),
-        );
+        return [
+            [$user],
+            [new TestUser('foo')],
+            ['foo'],
+        ];
     }
 
     /**
@@ -212,16 +212,16 @@ class AbstractTokenTest extends TestCase
     {
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
 
-        return array(
-            array('foo', 'bar'),
-            array('foo', new TestUser('bar')),
-            array('foo', $user),
-            array($user, 'foo'),
-            array($user, new TestUser('foo')),
-            array(new TestUser('foo'), new TestUser('bar')),
-            array(new TestUser('foo'), 'bar'),
-            array(new TestUser('foo'), $user),
-        );
+        return [
+            ['foo', 'bar'],
+            ['foo', new TestUser('bar')],
+            ['foo', $user],
+            [$user, 'foo'],
+            [$user, new TestUser('foo')],
+            [new TestUser('foo'), new TestUser('bar')],
+            [new TestUser('foo'), 'bar'],
+            [new TestUser('foo'), $user],
+        ];
     }
 
     /**
@@ -247,22 +247,22 @@ class AbstractTokenTest extends TestCase
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $advancedUser = $this->getMockBuilder('Symfony\Component\Security\Core\User\AdvancedUserInterface')->getMock();
 
-        return array(
-            array('foo', 'bar'),
-            array('foo', new TestUser('bar')),
-            array('foo', $user),
-            array('foo', $advancedUser),
-            array($user, 'foo'),
-            array($advancedUser, 'foo'),
-            array($user, new TestUser('foo')),
-            array($advancedUser, new TestUser('foo')),
-            array(new TestUser('foo'), new TestUser('bar')),
-            array(new TestUser('foo'), 'bar'),
-            array(new TestUser('foo'), $user),
-            array(new TestUser('foo'), $advancedUser),
-            array($user, $advancedUser),
-            array($advancedUser, $user),
-        );
+        return [
+            ['foo', 'bar'],
+            ['foo', new TestUser('bar')],
+            ['foo', $user],
+            ['foo', $advancedUser],
+            [$user, 'foo'],
+            [$advancedUser, 'foo'],
+            [$user, new TestUser('foo')],
+            [$advancedUser, new TestUser('foo')],
+            [new TestUser('foo'), new TestUser('bar')],
+            [new TestUser('foo'), 'bar'],
+            [new TestUser('foo'), $user],
+            [new TestUser('foo'), $advancedUser],
+            [$user, $advancedUser],
+            [$advancedUser, $user],
+        ];
     }
 
     /**
@@ -281,8 +281,8 @@ class AbstractTokenTest extends TestCase
         $this->assertTrue($token->isAuthenticated());
     }
 
-    protected function getToken(array $roles = array())
+    protected function getToken(array $roles = [])
     {
-        return $this->getMockForAbstractClass('Symfony\Component\Security\Core\Authentication\Token\AbstractToken', array($roles));
+        return $this->getMockForAbstractClass('Symfony\Component\Security\Core\Authentication\Token\AbstractToken', [$roles]);
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
index 1409752ac6..7024cc5356 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/AnonymousTokenTest.php
@@ -22,8 +22,8 @@ class AnonymousTokenTest extends TestCase
         $token = new AnonymousToken('foo', 'bar');
         $this->assertTrue($token->isAuthenticated());
 
-        $token = new AnonymousToken('foo', 'bar', array('ROLE_FOO'));
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $token = new AnonymousToken('foo', 'bar', ['ROLE_FOO']);
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
     }
 
     public function testGetKey()
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
index 5b2b1c07e6..7e64aa1a5d 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/PreAuthenticatedTokenTest.php
@@ -22,9 +22,9 @@ class PreAuthenticatedTokenTest extends TestCase
         $token = new PreAuthenticatedToken('foo', 'bar', 'key');
         $this->assertFalse($token->isAuthenticated());
 
-        $token = new PreAuthenticatedToken('foo', 'bar', 'key', array('ROLE_FOO'));
+        $token = new PreAuthenticatedToken('foo', 'bar', 'key', ['ROLE_FOO']);
         $this->assertTrue($token->isAuthenticated());
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
         $this->assertEquals('key', $token->getProviderKey());
     }
 
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
index fefb810997..8fa0307108 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/RememberMeTokenTest.php
@@ -24,7 +24,7 @@ class RememberMeTokenTest extends TestCase
 
         $this->assertEquals('fookey', $token->getProviderKey());
         $this->assertEquals('foo', $token->getSecret());
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
         $this->assertSame($user, $token->getUser());
         $this->assertTrue($token->isAuthenticated());
     }
@@ -41,7 +41,7 @@ class RememberMeTokenTest extends TestCase
         );
     }
 
-    protected function getUser($roles = array('ROLE_FOO'))
+    protected function getUser($roles = ['ROLE_FOO'])
     {
         $user = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $user
diff --git a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
index 12897ab1d1..87dceea3d8 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authentication/Token/UsernamePasswordTokenTest.php
@@ -22,8 +22,8 @@ class UsernamePasswordTokenTest extends TestCase
         $token = new UsernamePasswordToken('foo', 'bar', 'key');
         $this->assertFalse($token->isAuthenticated());
 
-        $token = new UsernamePasswordToken('foo', 'bar', 'key', array('ROLE_FOO'));
-        $this->assertEquals(array(new Role('ROLE_FOO')), $token->getRoles());
+        $token = new UsernamePasswordToken('foo', 'bar', 'key', ['ROLE_FOO']);
+        $this->assertEquals([new Role('ROLE_FOO')], $token->getRoles());
         $this->assertTrue($token->isAuthenticated());
         $this->assertEquals('key', $token->getProviderKey());
     }
@@ -53,7 +53,7 @@ class UsernamePasswordTokenTest extends TestCase
 
     public function testToString()
     {
-        $token = new UsernamePasswordToken('foo', '', 'foo', array('A', 'B'));
+        $token = new UsernamePasswordToken('foo', '', 'foo', ['A', 'B']);
         $this->assertEquals('UsernamePasswordToken(user="foo", authenticated=true, roles="A, B")', (string) $token);
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
index 192fe87e2a..1725ef8c48 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/AccessDecisionManagerTest.php
@@ -22,7 +22,7 @@ class AccessDecisionManagerTest extends TestCase
      */
     public function testSetUnsupportedStrategy()
     {
-        new AccessDecisionManager(array($this->getVoter(VoterInterface::ACCESS_GRANTED)), 'fooBar');
+        new AccessDecisionManager([$this->getVoter(VoterInterface::ACCESS_GRANTED)], 'fooBar');
     }
 
     /**
@@ -33,7 +33,7 @@ class AccessDecisionManagerTest extends TestCase
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
         $manager = new AccessDecisionManager($voters, $strategy, $allowIfAllAbstainDecisions, $allowIfEqualGrantedDeniedDecisions);
 
-        $this->assertSame($expected, $manager->decide($token, array('ROLE_FOO')));
+        $this->assertSame($expected, $manager->decide($token, ['ROLE_FOO']));
     }
 
     /**
@@ -41,27 +41,27 @@ class AccessDecisionManagerTest extends TestCase
      */
     public function testStrategiesWith2Roles($token, $strategy, $voter, $expected)
     {
-        $manager = new AccessDecisionManager(array($voter), $strategy);
+        $manager = new AccessDecisionManager([$voter], $strategy);
 
-        $this->assertSame($expected, $manager->decide($token, array('ROLE_FOO', 'ROLE_BAR')));
+        $this->assertSame($expected, $manager->decide($token, ['ROLE_FOO', 'ROLE_BAR']));
     }
 
     public function getStrategiesWith2RolesTests()
     {
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
-        return array(
-            array($token, 'affirmative', $this->getVoter(VoterInterface::ACCESS_DENIED), false),
-            array($token, 'affirmative', $this->getVoter(VoterInterface::ACCESS_GRANTED), true),
+        return [
+            [$token, 'affirmative', $this->getVoter(VoterInterface::ACCESS_DENIED), false],
+            [$token, 'affirmative', $this->getVoter(VoterInterface::ACCESS_GRANTED), true],
 
-            array($token, 'consensus', $this->getVoter(VoterInterface::ACCESS_DENIED), false),
-            array($token, 'consensus', $this->getVoter(VoterInterface::ACCESS_GRANTED), true),
+            [$token, 'consensus', $this->getVoter(VoterInterface::ACCESS_DENIED), false],
+            [$token, 'consensus', $this->getVoter(VoterInterface::ACCESS_GRANTED), true],
 
-            array($token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_DENIED, VoterInterface::ACCESS_DENIED), false),
-            array($token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_DENIED, VoterInterface::ACCESS_GRANTED), false),
-            array($token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_GRANTED, VoterInterface::ACCESS_DENIED), false),
-            array($token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_GRANTED, VoterInterface::ACCESS_GRANTED), true),
-        );
+            [$token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_DENIED, VoterInterface::ACCESS_DENIED), false],
+            [$token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_DENIED, VoterInterface::ACCESS_GRANTED), false],
+            [$token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_GRANTED, VoterInterface::ACCESS_DENIED), false],
+            [$token, 'unanimous', $this->getVoterFor2Roles($token, VoterInterface::ACCESS_GRANTED, VoterInterface::ACCESS_GRANTED), true],
+        ];
     }
 
     protected function getVoterFor2Roles($token, $vote1, $vote2)
@@ -69,10 +69,10 @@ class AccessDecisionManagerTest extends TestCase
         $voter = $this->getMockBuilder('Symfony\Component\Security\Core\Authorization\Voter\VoterInterface')->getMock();
         $voter->expects($this->any())
               ->method('vote')
-              ->will($this->returnValueMap(array(
-                  array($token, null, array('ROLE_FOO'), $vote1),
-                  array($token, null, array('ROLE_BAR'), $vote2),
-              )))
+              ->will($this->returnValueMap([
+                  [$token, null, ['ROLE_FOO'], $vote1],
+                  [$token, null, ['ROLE_BAR'], $vote2],
+              ]))
         ;
 
         return $voter;
@@ -80,42 +80,42 @@ class AccessDecisionManagerTest extends TestCase
 
     public function getStrategyTests()
     {
-        return array(
+        return [
             // affirmative
-            array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(1, 0, 0), false, true, true),
-            array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(1, 2, 0), false, true, true),
-            array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 1, 0), false, true, false),
-            array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 0, 1), false, true, false),
-            array(AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 0, 1), true, true, true),
+            [AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(1, 0, 0), false, true, true],
+            [AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(1, 2, 0), false, true, true],
+            [AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 1, 0), false, true, false],
+            [AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 0, 1), false, true, false],
+            [AccessDecisionManager::STRATEGY_AFFIRMATIVE, $this->getVoters(0, 0, 1), true, true, true],
 
             // consensus
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(1, 0, 0), false, true, true),
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(1, 2, 0), false, true, false),
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 1, 0), false, true, true),
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(1, 0, 0), false, true, true],
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(1, 2, 0), false, true, false],
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 1, 0), false, true, true],
 
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(0, 0, 1), false, true, false),
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(0, 0, 1), false, true, false],
 
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(0, 0, 1), true, true, true),
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(0, 0, 1), true, true, true],
 
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 0), false, true, true),
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 1), false, true, true),
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 0), false, true, true],
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 1), false, true, true],
 
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 0), false, false, false),
-            array(AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 1), false, false, false),
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 0), false, false, false],
+            [AccessDecisionManager::STRATEGY_CONSENSUS, $this->getVoters(2, 2, 1), false, false, false],
 
             // unanimous
-            array(AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 0, 0), false, true, true),
-            array(AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 0, 1), false, true, true),
-            array(AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 1, 0), false, true, false),
+            [AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 0, 0), false, true, true],
+            [AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 0, 1), false, true, true],
+            [AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(1, 1, 0), false, true, false],
 
-            array(AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(0, 0, 2), false, true, false),
-            array(AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(0, 0, 2), true, true, true),
-        );
+            [AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(0, 0, 2), false, true, false],
+            [AccessDecisionManager::STRATEGY_UNANIMOUS, $this->getVoters(0, 0, 2), true, true, true],
+        ];
     }
 
     protected function getVoters($grants, $denies, $abstains)
     {
-        $voters = array();
+        $voters = [];
         for ($i = 0; $i < $grants; ++$i) {
             $voters[] = $this->getVoter(VoterInterface::ACCESS_GRANTED);
         }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
index e3e1c447af..6a07c94f20 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/AuthorizationCheckerTest.php
@@ -95,6 +95,6 @@ class AuthorizationCheckerTest extends TestCase
 
     public function isGrantedProvider()
     {
-        return array(array(true), array(false));
+        return [[true], [false]];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
index 59eb1ab5cb..2950d3feff 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/ExpressionLanguageTest.php
@@ -35,10 +35,10 @@ class ExpressionLanguageTest extends TestCase
         $trustResolver = new AuthenticationTrustResolver();
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken($token);
-        $accessDecisionManager = new AccessDecisionManager(array(new RoleVoter()));
+        $accessDecisionManager = new AccessDecisionManager([new RoleVoter()]);
         $authChecker = new AuthorizationChecker($tokenStorage, $this->getMockBuilder(AuthenticationManagerInterface::class)->getMock(), $accessDecisionManager);
 
-        $context = array();
+        $context = [];
         $context['trust_resolver'] = $trustResolver;
         $context['auth_checker'] = $authChecker;
         $context['token'] = $token;
@@ -48,7 +48,7 @@ class ExpressionLanguageTest extends TestCase
 
     public function provider()
     {
-        $roles = array('ROLE_USER', 'ROLE_ADMIN');
+        $roles = ['ROLE_USER', 'ROLE_ADMIN'];
         $user = new User('username', 'password', $roles);
 
         $noToken = null;
@@ -56,57 +56,57 @@ class ExpressionLanguageTest extends TestCase
         $rememberMeToken = new RememberMeToken($user, 'providerkey', 'firewall');
         $usernamePasswordToken = new UsernamePasswordToken('username', 'password', 'providerkey', $roles);
 
-        return array(
-            array($noToken, 'is_anonymous()', false),
-            array($noToken, 'is_authenticated()', false),
-            array($noToken, 'is_fully_authenticated()', false),
-            array($noToken, 'is_remember_me()', false),
+        return [
+            [$noToken, 'is_anonymous()', false],
+            [$noToken, 'is_authenticated()', false],
+            [$noToken, 'is_fully_authenticated()', false],
+            [$noToken, 'is_remember_me()', false],
 
-            array($anonymousToken, 'is_anonymous()', true),
-            array($anonymousToken, 'is_authenticated()', false),
-            array($anonymousToken, 'is_fully_authenticated()', false),
-            array($anonymousToken, 'is_remember_me()', false),
-            array($anonymousToken, "is_granted('ROLE_USER')", false),
+            [$anonymousToken, 'is_anonymous()', true],
+            [$anonymousToken, 'is_authenticated()', false],
+            [$anonymousToken, 'is_fully_authenticated()', false],
+            [$anonymousToken, 'is_remember_me()', false],
+            [$anonymousToken, "is_granted('ROLE_USER')", false],
 
-            array($rememberMeToken, 'is_anonymous()', false),
-            array($rememberMeToken, 'is_authenticated()', true),
-            array($rememberMeToken, 'is_fully_authenticated()', false),
-            array($rememberMeToken, 'is_remember_me()', true),
-            array($rememberMeToken, "is_granted('ROLE_FOO')", false),
-            array($rememberMeToken, "is_granted('ROLE_USER')", true),
+            [$rememberMeToken, 'is_anonymous()', false],
+            [$rememberMeToken, 'is_authenticated()', true],
+            [$rememberMeToken, 'is_fully_authenticated()', false],
+            [$rememberMeToken, 'is_remember_me()', true],
+            [$rememberMeToken, "is_granted('ROLE_FOO')", false],
+            [$rememberMeToken, "is_granted('ROLE_USER')", true],
 
-            array($usernamePasswordToken, 'is_anonymous()', false),
-            array($usernamePasswordToken, 'is_authenticated()', true),
-            array($usernamePasswordToken, 'is_fully_authenticated()', true),
-            array($usernamePasswordToken, 'is_remember_me()', false),
-            array($usernamePasswordToken, "is_granted('ROLE_FOO')", false),
-            array($usernamePasswordToken, "is_granted('ROLE_USER')", true),
-        );
+            [$usernamePasswordToken, 'is_anonymous()', false],
+            [$usernamePasswordToken, 'is_authenticated()', true],
+            [$usernamePasswordToken, 'is_fully_authenticated()', true],
+            [$usernamePasswordToken, 'is_remember_me()', false],
+            [$usernamePasswordToken, "is_granted('ROLE_FOO')", false],
+            [$usernamePasswordToken, "is_granted('ROLE_USER')", true],
+        ];
     }
 
     /**
      * @dataProvider provideLegacyHasRole
      * @group legacy
      */
-    public function testLegacyHasRole($expression, $result, $roles = array())
+    public function testLegacyHasRole($expression, $result, $roles = [])
     {
         $expressionLanguage = new ExpressionLanguage();
-        $context = array('roles' => $roles);
+        $context = ['roles' => $roles];
 
         $this->assertEquals($result, $expressionLanguage->evaluate($expression, $context));
     }
 
     public function provideLegacyHasRole()
     {
-        $roles = array('ROLE_USER', 'ROLE_ADMIN');
+        $roles = ['ROLE_USER', 'ROLE_ADMIN'];
 
-        return array(
-            array("has_role('ROLE_FOO')", false),
-            array("has_role('ROLE_USER')", false),
-            array("has_role('ROLE_ADMIN')", false),
-            array("has_role('ROLE_FOO')", false, $roles),
-            array("has_role('ROLE_USER')", true, $roles),
-            array("has_role('ROLE_ADMIN')", true, $roles),
-        );
+        return [
+            ["has_role('ROLE_FOO')", false],
+            ["has_role('ROLE_USER')", false],
+            ["has_role('ROLE_ADMIN')", false],
+            ["has_role('ROLE_FOO')", false, $roles],
+            ["has_role('ROLE_USER')", true, $roles],
+            ["has_role('ROLE_ADMIN')", true, $roles],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/TraceableAccessDecisionManagerTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/TraceableAccessDecisionManagerTest.php
index c8875701b8..5df07a2248 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/TraceableAccessDecisionManagerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/TraceableAccessDecisionManagerTest.php
@@ -29,7 +29,7 @@ class TraceableAccessDecisionManagerTest extends TestCase
 
         $admMock = $this
             ->getMockBuilder(AccessDecisionManager::class)
-            ->setMethods(array('decide'))
+            ->setMethods(['decide'])
             ->getMock();
 
         $adm = new TraceableAccessDecisionManager($admMock);
@@ -58,120 +58,120 @@ class TraceableAccessDecisionManagerTest extends TestCase
         $voter1 = $this->getMockForAbstractClass(VoterInterface::class);
         $voter2 = $this->getMockForAbstractClass(VoterInterface::class);
 
-        yield array(
-            array(array(
-                'attributes' => array('ATTRIBUTE_1'),
+        yield [
+            [[
+                'attributes' => ['ATTRIBUTE_1'],
                 'object' => null,
                 'result' => true,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('ATTRIBUTE_1'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                    array('voter' => $voter2, 'attributes' => array('ATTRIBUTE_1'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                ),
-            )),
-            array('ATTRIBUTE_1'),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['ATTRIBUTE_1'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                    ['voter' => $voter2, 'attributes' => ['ATTRIBUTE_1'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                ],
+            ]],
+            ['ATTRIBUTE_1'],
             null,
-            array(
-                array($voter1, VoterInterface::ACCESS_GRANTED),
-                array($voter2, VoterInterface::ACCESS_GRANTED),
-            ),
+            [
+                [$voter1, VoterInterface::ACCESS_GRANTED],
+                [$voter2, VoterInterface::ACCESS_GRANTED],
+            ],
             true,
-        );
-        yield array(
-            array(array(
-                'attributes' => array('ATTRIBUTE_1', 'ATTRIBUTE_2'),
+        ];
+        yield [
+            [[
+                'attributes' => ['ATTRIBUTE_1', 'ATTRIBUTE_2'],
                 'object' => true,
                 'result' => false,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('ATTRIBUTE_1', 'ATTRIBUTE_2'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array('ATTRIBUTE_1', 'ATTRIBUTE_2'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                ),
-            )),
-            array('ATTRIBUTE_1', 'ATTRIBUTE_2'),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['ATTRIBUTE_1', 'ATTRIBUTE_2'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => ['ATTRIBUTE_1', 'ATTRIBUTE_2'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                ],
+            ]],
+            ['ATTRIBUTE_1', 'ATTRIBUTE_2'],
             true,
-            array(
-                array($voter1, VoterInterface::ACCESS_ABSTAIN),
-                array($voter2, VoterInterface::ACCESS_GRANTED),
-            ),
+            [
+                [$voter1, VoterInterface::ACCESS_ABSTAIN],
+                [$voter2, VoterInterface::ACCESS_GRANTED],
+            ],
             false,
-        );
-        yield array(
-            array(array(
-                'attributes' => array(null),
+        ];
+        yield [
+            [[
+                'attributes' => [null],
                 'object' => 'jolie string',
                 'result' => false,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array(null), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array(null), 'vote' => VoterInterface::ACCESS_DENIED),
-                ),
-            )),
-            array(null),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => [null], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => [null], 'vote' => VoterInterface::ACCESS_DENIED],
+                ],
+            ]],
+            [null],
             'jolie string',
-            array(
-                array($voter1, VoterInterface::ACCESS_ABSTAIN),
-                array($voter2, VoterInterface::ACCESS_DENIED),
-            ),
+            [
+                [$voter1, VoterInterface::ACCESS_ABSTAIN],
+                [$voter2, VoterInterface::ACCESS_DENIED],
+            ],
             false,
-        );
-        yield array(
-            array(array(
-                'attributes' => array(12),
+        ];
+        yield [
+            [[
+                'attributes' => [12],
                 'object' => 12345,
                 'result' => true,
-                'voterDetails' => array(),
-            )),
-            'attributes' => array(12),
+                'voterDetails' => [],
+            ]],
+            'attributes' => [12],
             12345,
-            array(),
+            [],
             true,
-        );
-        yield array(
-            array(array(
-                'attributes' => array(new \stdClass()),
+        ];
+        yield [
+            [[
+                'attributes' => [new \stdClass()],
                 'object' => $x = fopen(__FILE__, 'rb'),
                 'result' => true,
-                'voterDetails' => array(),
-            )),
-            array(new \stdClass()),
+                'voterDetails' => [],
+            ]],
+            [new \stdClass()],
             $x,
-            array(),
+            [],
             true,
-        );
-        yield array(
-            array(array(
-                'attributes' => array('ATTRIBUTE_2'),
-                'object' => $x = array(),
+        ];
+        yield [
+            [[
+                'attributes' => ['ATTRIBUTE_2'],
+                'object' => $x = [],
                 'result' => false,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('ATTRIBUTE_2'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array('ATTRIBUTE_2'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                ),
-            )),
-            array('ATTRIBUTE_2'),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['ATTRIBUTE_2'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => ['ATTRIBUTE_2'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                ],
+            ]],
+            ['ATTRIBUTE_2'],
             $x,
-            array(
-                array($voter1, VoterInterface::ACCESS_ABSTAIN),
-                array($voter2, VoterInterface::ACCESS_ABSTAIN),
-            ),
+            [
+                [$voter1, VoterInterface::ACCESS_ABSTAIN],
+                [$voter2, VoterInterface::ACCESS_ABSTAIN],
+            ],
             false,
-        );
-        yield array(
-            array(array(
-                'attributes' => array(12.13),
+        ];
+        yield [
+            [[
+                'attributes' => [12.13],
                 'object' => new \stdClass(),
                 'result' => false,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array(12.13), 'vote' => VoterInterface::ACCESS_DENIED),
-                    array('voter' => $voter2, 'attributes' => array(12.13), 'vote' => VoterInterface::ACCESS_DENIED),
-                ),
-            )),
-            array(12.13),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => [12.13], 'vote' => VoterInterface::ACCESS_DENIED],
+                    ['voter' => $voter2, 'attributes' => [12.13], 'vote' => VoterInterface::ACCESS_DENIED],
+                ],
+            ]],
+            [12.13],
             new \stdClass(),
-            array(
-                array($voter1, VoterInterface::ACCESS_DENIED),
-                array($voter2, VoterInterface::ACCESS_DENIED),
-            ),
+            [
+                [$voter1, VoterInterface::ACCESS_DENIED],
+                [$voter2, VoterInterface::ACCESS_DENIED],
+            ],
             false,
-        );
+        ];
     }
 
     public function testDebugAccessDecisionManagerAliasExistsForBC()
@@ -188,20 +188,20 @@ class TraceableAccessDecisionManagerTest extends TestCase
     {
         $voter1 = $this
             ->getMockBuilder(VoterInterface::class)
-            ->setMethods(array('vote'))
+            ->setMethods(['vote'])
             ->getMock();
 
         $voter2 = $this
             ->getMockBuilder(VoterInterface::class)
-            ->setMethods(array('vote'))
+            ->setMethods(['vote'])
             ->getMock();
 
         $voter3 = $this
             ->getMockBuilder(VoterInterface::class)
-            ->setMethods(array('vote'))
+            ->setMethods(['vote'])
             ->getMock();
 
-        $sut = new TraceableAccessDecisionManager(new AccessDecisionManager(array($voter1, $voter2, $voter3)));
+        $sut = new TraceableAccessDecisionManager(new AccessDecisionManager([$voter1, $voter2, $voter3]));
 
         $voter1
             ->expects($this->any())
@@ -244,37 +244,37 @@ class TraceableAccessDecisionManagerTest extends TestCase
             });
 
         $token = $this->getMockBuilder(TokenInterface::class)->getMock();
-        $sut->decide($token, array('attr1'), null);
-        $sut->decide($token, array('attr2'), $obj = new \stdClass());
+        $sut->decide($token, ['attr1'], null);
+        $sut->decide($token, ['attr2'], $obj = new \stdClass());
 
-        $this->assertEquals(array(
-            array(
-                'attributes' => array('attr1'),
+        $this->assertEquals([
+            [
+                'attributes' => ['attr1'],
                 'object' => null,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('attr1'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                ),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['attr1'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                ],
                 'result' => true,
-            ),
-            array(
-                'attributes' => array('attr2'),
+            ],
+            [
+                'attributes' => ['attr2'],
                 'object' => null,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('attr2'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array('attr2'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                ),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['attr2'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => ['attr2'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                ],
                 'result' => true,
-            ),
-            array(
-                'attributes' => array('attr2'),
+            ],
+            [
+                'attributes' => ['attr2'],
                 'object' => $obj,
-                'voterDetails' => array(
-                    array('voter' => $voter1, 'attributes' => array('attr2'), 'vote' => VoterInterface::ACCESS_ABSTAIN),
-                    array('voter' => $voter2, 'attributes' => array('attr2'), 'vote' => VoterInterface::ACCESS_DENIED),
-                    array('voter' => $voter3, 'attributes' => array('attr2'), 'vote' => VoterInterface::ACCESS_GRANTED),
-                ),
+                'voterDetails' => [
+                    ['voter' => $voter1, 'attributes' => ['attr2'], 'vote' => VoterInterface::ACCESS_ABSTAIN],
+                    ['voter' => $voter2, 'attributes' => ['attr2'], 'vote' => VoterInterface::ACCESS_DENIED],
+                    ['voter' => $voter3, 'attributes' => ['attr2'], 'vote' => VoterInterface::ACCESS_GRANTED],
+                ],
                 'result' => true,
-            ),
-        ), $sut->getDecisionLog());
+            ],
+        ], $sut->getDecisionLog());
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
index 0651526f49..547c180657 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/AuthenticatedVoterTest.php
@@ -30,26 +30,26 @@ class AuthenticatedVoterTest extends TestCase
 
     public function getVoteTests()
     {
-        return array(
-            array('fully', array(), VoterInterface::ACCESS_ABSTAIN),
-            array('fully', array('FOO'), VoterInterface::ACCESS_ABSTAIN),
-            array('remembered', array(), VoterInterface::ACCESS_ABSTAIN),
-            array('remembered', array('FOO'), VoterInterface::ACCESS_ABSTAIN),
-            array('anonymously', array(), VoterInterface::ACCESS_ABSTAIN),
-            array('anonymously', array('FOO'), VoterInterface::ACCESS_ABSTAIN),
+        return [
+            ['fully', [], VoterInterface::ACCESS_ABSTAIN],
+            ['fully', ['FOO'], VoterInterface::ACCESS_ABSTAIN],
+            ['remembered', [], VoterInterface::ACCESS_ABSTAIN],
+            ['remembered', ['FOO'], VoterInterface::ACCESS_ABSTAIN],
+            ['anonymously', [], VoterInterface::ACCESS_ABSTAIN],
+            ['anonymously', ['FOO'], VoterInterface::ACCESS_ABSTAIN],
 
-            array('fully', array('IS_AUTHENTICATED_ANONYMOUSLY'), VoterInterface::ACCESS_GRANTED),
-            array('remembered', array('IS_AUTHENTICATED_ANONYMOUSLY'), VoterInterface::ACCESS_GRANTED),
-            array('anonymously', array('IS_AUTHENTICATED_ANONYMOUSLY'), VoterInterface::ACCESS_GRANTED),
+            ['fully', ['IS_AUTHENTICATED_ANONYMOUSLY'], VoterInterface::ACCESS_GRANTED],
+            ['remembered', ['IS_AUTHENTICATED_ANONYMOUSLY'], VoterInterface::ACCESS_GRANTED],
+            ['anonymously', ['IS_AUTHENTICATED_ANONYMOUSLY'], VoterInterface::ACCESS_GRANTED],
 
-            array('fully', array('IS_AUTHENTICATED_REMEMBERED'), VoterInterface::ACCESS_GRANTED),
-            array('remembered', array('IS_AUTHENTICATED_REMEMBERED'), VoterInterface::ACCESS_GRANTED),
-            array('anonymously', array('IS_AUTHENTICATED_REMEMBERED'), VoterInterface::ACCESS_DENIED),
+            ['fully', ['IS_AUTHENTICATED_REMEMBERED'], VoterInterface::ACCESS_GRANTED],
+            ['remembered', ['IS_AUTHENTICATED_REMEMBERED'], VoterInterface::ACCESS_GRANTED],
+            ['anonymously', ['IS_AUTHENTICATED_REMEMBERED'], VoterInterface::ACCESS_DENIED],
 
-            array('fully', array('IS_AUTHENTICATED_FULLY'), VoterInterface::ACCESS_GRANTED),
-            array('remembered', array('IS_AUTHENTICATED_FULLY'), VoterInterface::ACCESS_DENIED),
-            array('anonymously', array('IS_AUTHENTICATED_FULLY'), VoterInterface::ACCESS_DENIED),
-        );
+            ['fully', ['IS_AUTHENTICATED_FULLY'], VoterInterface::ACCESS_GRANTED],
+            ['remembered', ['IS_AUTHENTICATED_FULLY'], VoterInterface::ACCESS_DENIED],
+            ['anonymously', ['IS_AUTHENTICATED_FULLY'], VoterInterface::ACCESS_DENIED],
+        ];
     }
 
     protected function getToken($authenticated)
@@ -57,9 +57,9 @@ class AuthenticatedVoterTest extends TestCase
         if ('fully' === $authenticated) {
             return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
         } elseif ('remembered' === $authenticated) {
-            return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(array('setPersistent'))->disableOriginalConstructor()->getMock();
+            return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\RememberMeToken')->setMethods(['setPersistent'])->disableOriginalConstructor()->getMock();
         } else {
-            return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setConstructorArgs(array('', ''))->getMock();
+            return $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\AnonymousToken')->setConstructorArgs(['', ''])->getMock();
         }
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
index 9b7bf67709..632c6d0ab0 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/ExpressionVoterTest.php
@@ -31,15 +31,15 @@ class ExpressionVoterTest extends TestCase
 
     public function getVoteTests()
     {
-        return array(
-            array(array(), array(), VoterInterface::ACCESS_ABSTAIN, false, false),
-            array(array(), array('FOO'), VoterInterface::ACCESS_ABSTAIN, false, false),
+        return [
+            [[], [], VoterInterface::ACCESS_ABSTAIN, false, false],
+            [[], ['FOO'], VoterInterface::ACCESS_ABSTAIN, false, false],
 
-            array(array(), array($this->createExpression()), VoterInterface::ACCESS_DENIED, true, false),
+            [[], [$this->createExpression()], VoterInterface::ACCESS_DENIED, true, false],
 
-            array(array('ROLE_FOO'), array($this->createExpression(), $this->createExpression()), VoterInterface::ACCESS_GRANTED),
-            array(array('ROLE_BAR', 'ROLE_FOO'), array($this->createExpression()), VoterInterface::ACCESS_GRANTED),
-        );
+            [['ROLE_FOO'], [$this->createExpression(), $this->createExpression()], VoterInterface::ACCESS_GRANTED],
+            [['ROLE_BAR', 'ROLE_FOO'], [$this->createExpression()], VoterInterface::ACCESS_GRANTED],
+        ];
     }
 
     protected function getToken(array $roles, $tokenExpectsGetRoles = true)
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleHierarchyVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleHierarchyVoterTest.php
index 4b03bacd78..14705fbf96 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleHierarchyVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleHierarchyVoterTest.php
@@ -22,16 +22,16 @@ class RoleHierarchyVoterTest extends RoleVoterTest
      */
     public function testVote($roles, $attributes, $expected)
     {
-        $voter = new RoleHierarchyVoter(new RoleHierarchy(array('ROLE_FOO' => array('ROLE_FOOBAR'))));
+        $voter = new RoleHierarchyVoter(new RoleHierarchy(['ROLE_FOO' => ['ROLE_FOOBAR']]));
 
         $this->assertSame($expected, $voter->vote($this->getToken($roles), null, $attributes));
     }
 
     public function getVoteTests()
     {
-        return array_merge(parent::getVoteTests(), array(
-            array(array('ROLE_FOO'), array('ROLE_FOOBAR'), VoterInterface::ACCESS_GRANTED),
-        ));
+        return array_merge(parent::getVoteTests(), [
+            [['ROLE_FOO'], ['ROLE_FOOBAR'], VoterInterface::ACCESS_GRANTED],
+        ]);
     }
 
     /**
@@ -39,7 +39,7 @@ class RoleHierarchyVoterTest extends RoleVoterTest
      */
     public function testVoteWithEmptyHierarchy($roles, $attributes, $expected)
     {
-        $voter = new RoleHierarchyVoter(new RoleHierarchy(array()));
+        $voter = new RoleHierarchyVoter(new RoleHierarchy([]));
 
         $this->assertSame($expected, $voter->vote($this->getToken($roles), null, $attributes));
     }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
index 242a2f5814..5fb45e08b3 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/RoleVoterTest.php
@@ -30,20 +30,20 @@ class RoleVoterTest extends TestCase
 
     public function getVoteTests()
     {
-        return array(
-            array(array(), array(), VoterInterface::ACCESS_ABSTAIN),
-            array(array(), array('FOO'), VoterInterface::ACCESS_ABSTAIN),
-            array(array(), array('ROLE_FOO'), VoterInterface::ACCESS_DENIED),
-            array(array('ROLE_FOO'), array('ROLE_FOO'), VoterInterface::ACCESS_GRANTED),
-            array(array('ROLE_FOO'), array('FOO', 'ROLE_FOO'), VoterInterface::ACCESS_GRANTED),
-            array(array('ROLE_BAR', 'ROLE_FOO'), array('ROLE_FOO'), VoterInterface::ACCESS_GRANTED),
+        return [
+            [[], [], VoterInterface::ACCESS_ABSTAIN],
+            [[], ['FOO'], VoterInterface::ACCESS_ABSTAIN],
+            [[], ['ROLE_FOO'], VoterInterface::ACCESS_DENIED],
+            [['ROLE_FOO'], ['ROLE_FOO'], VoterInterface::ACCESS_GRANTED],
+            [['ROLE_FOO'], ['FOO', 'ROLE_FOO'], VoterInterface::ACCESS_GRANTED],
+            [['ROLE_BAR', 'ROLE_FOO'], ['ROLE_FOO'], VoterInterface::ACCESS_GRANTED],
 
             // Test mixed Types
-            array(array(), array(array()), VoterInterface::ACCESS_ABSTAIN),
-            array(array(), array(new \stdClass()), VoterInterface::ACCESS_ABSTAIN),
-            array(array('ROLE_BAR'), array(new Role('ROLE_BAR')), VoterInterface::ACCESS_GRANTED),
-            array(array('ROLE_BAR'), array(new Role('ROLE_FOO')), VoterInterface::ACCESS_DENIED),
-        );
+            [[], [[]], VoterInterface::ACCESS_ABSTAIN],
+            [[], [new \stdClass()], VoterInterface::ACCESS_ABSTAIN],
+            [['ROLE_BAR'], [new Role('ROLE_BAR')], VoterInterface::ACCESS_GRANTED],
+            [['ROLE_BAR'], [new Role('ROLE_FOO')], VoterInterface::ACCESS_DENIED],
+        ];
     }
 
     protected function getToken(array $roles)
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/TraceableVoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/TraceableVoterTest.php
index 8d8ba18151..99bf1f6eff 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/TraceableVoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/TraceableVoterTest.php
@@ -38,16 +38,16 @@ class TraceableVoterTest extends TestCase
         $voter
             ->expects($this->once())
             ->method('vote')
-            ->with($token, 'anysubject', array('attr1'))
+            ->with($token, 'anysubject', ['attr1'])
             ->willReturn(VoterInterface::ACCESS_DENIED);
 
         $eventDispatcher
             ->expects($this->once())
             ->method('dispatch')
-            ->with('debug.security.authorization.vote', new VoteEvent($voter, 'anysubject', array('attr1'), VoterInterface::ACCESS_DENIED));
+            ->with('debug.security.authorization.vote', new VoteEvent($voter, 'anysubject', ['attr1'], VoterInterface::ACCESS_DENIED));
 
         $sut = new TraceableVoter($voter, $eventDispatcher);
-        $result = $sut->vote($token, 'anysubject', array('attr1'));
+        $result = $sut->vote($token, 'anysubject', ['attr1']);
 
         $this->assertSame(VoterInterface::ACCESS_DENIED, $result);
     }
diff --git a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
index f0e10cde1a..50dc84e435 100644
--- a/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Authorization/Voter/VoterTest.php
@@ -27,23 +27,23 @@ class VoterTest extends TestCase
 
     public function getTests()
     {
-        return array(
-            array(array('EDIT'), VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if attribute and class are supported and attribute grants access'),
-            array(array('CREATE'), VoterInterface::ACCESS_DENIED, new \stdClass(), 'ACCESS_DENIED if attribute and class are supported and attribute does not grant access'),
+        return [
+            [['EDIT'], VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if attribute and class are supported and attribute grants access'],
+            [['CREATE'], VoterInterface::ACCESS_DENIED, new \stdClass(), 'ACCESS_DENIED if attribute and class are supported and attribute does not grant access'],
 
-            array(array('DELETE', 'EDIT'), VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if one attribute is supported and grants access'),
-            array(array('DELETE', 'CREATE'), VoterInterface::ACCESS_DENIED, new \stdClass(), 'ACCESS_DENIED if one attribute is supported and denies access'),
+            [['DELETE', 'EDIT'], VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if one attribute is supported and grants access'],
+            [['DELETE', 'CREATE'], VoterInterface::ACCESS_DENIED, new \stdClass(), 'ACCESS_DENIED if one attribute is supported and denies access'],
 
-            array(array('CREATE', 'EDIT'), VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if one attribute grants access'),
+            [['CREATE', 'EDIT'], VoterInterface::ACCESS_GRANTED, new \stdClass(), 'ACCESS_GRANTED if one attribute grants access'],
 
-            array(array('DELETE'), VoterInterface::ACCESS_ABSTAIN, new \stdClass(), 'ACCESS_ABSTAIN if no attribute is supported'),
+            [['DELETE'], VoterInterface::ACCESS_ABSTAIN, new \stdClass(), 'ACCESS_ABSTAIN if no attribute is supported'],
 
-            array(array('EDIT'), VoterInterface::ACCESS_ABSTAIN, $this, 'ACCESS_ABSTAIN if class is not supported'),
+            [['EDIT'], VoterInterface::ACCESS_ABSTAIN, $this, 'ACCESS_ABSTAIN if class is not supported'],
 
-            array(array('EDIT'), VoterInterface::ACCESS_ABSTAIN, null, 'ACCESS_ABSTAIN if object is null'),
+            [['EDIT'], VoterInterface::ACCESS_ABSTAIN, null, 'ACCESS_ABSTAIN if object is null'],
 
-            array(array(), VoterInterface::ACCESS_ABSTAIN, new \stdClass(), 'ACCESS_ABSTAIN if no attributes were provided'),
-        );
+            [[], VoterInterface::ACCESS_ABSTAIN, new \stdClass(), 'ACCESS_ABSTAIN if no attributes were provided'],
+        ];
     }
 
     /**
@@ -66,6 +66,6 @@ class VoterTest_Voter extends Voter
 
     protected function supports($attribute, $object)
     {
-        return $object instanceof \stdClass && \in_array($attribute, array('EDIT', 'CREATE'));
+        return $object instanceof \stdClass && \in_array($attribute, ['EDIT', 'CREATE']);
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
index 55590ffc3d..7f9dbe7f33 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/BCryptPasswordEncoderTest.php
@@ -49,7 +49,7 @@ class BCryptPasswordEncoderTest extends TestCase
     public function validRangeData()
     {
         $costs = range(4, 31);
-        array_walk($costs, function (&$cost) { $cost = array($cost); });
+        array_walk($costs, function (&$cost) { $cost = [$cost]; });
 
         return $costs;
     }
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
index 0742f421df..2251cfdf90 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/BasePasswordEncoderTest.php
@@ -35,9 +35,9 @@ class BasePasswordEncoderTest extends TestCase
 
     public function testDemergePasswordAndSalt()
     {
-        $this->assertEquals(array('password', 'salt'), $this->invokeDemergePasswordAndSalt('password{salt}'));
-        $this->assertEquals(array('password', ''), $this->invokeDemergePasswordAndSalt('password'));
-        $this->assertEquals(array('', ''), $this->invokeDemergePasswordAndSalt(''));
+        $this->assertEquals(['password', 'salt'], $this->invokeDemergePasswordAndSalt('password{salt}'));
+        $this->assertEquals(['password', ''], $this->invokeDemergePasswordAndSalt('password'));
+        $this->assertEquals(['', ''], $this->invokeDemergePasswordAndSalt(''));
     }
 
     public function testMergePasswordAndSalt()
diff --git a/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php b/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
index 9a56b838aa..ae8467af57 100644
--- a/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Encoder/EncoderFactoryTest.php
@@ -22,10 +22,10 @@ class EncoderFactoryTest extends TestCase
 {
     public function testGetEncoderWithMessageDigestEncoder()
     {
-        $factory = new EncoderFactory(array('Symfony\Component\Security\Core\User\UserInterface' => array(
+        $factory = new EncoderFactory(['Symfony\Component\Security\Core\User\UserInterface' => [
             'class' => 'Symfony\Component\Security\Core\Encoder\MessageDigestPasswordEncoder',
-            'arguments' => array('sha512', true, 5),
-        )));
+            'arguments' => ['sha512', true, 5],
+        ]]);
 
         $encoder = $factory->getEncoder($this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock());
         $expectedEncoder = new MessageDigestPasswordEncoder('sha512', true, 5);
@@ -35,9 +35,9 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetEncoderWithService()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\User\UserInterface' => new MessageDigestPasswordEncoder('sha1'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder($this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock());
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
@@ -50,9 +50,9 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetEncoderWithClassName()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\User\UserInterface' => new MessageDigestPasswordEncoder('sha1'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder('Symfony\Component\Security\Core\Tests\Encoder\SomeChildUser');
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
@@ -61,9 +61,9 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetEncoderConfiguredForConcreteClassWithService()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\User\User' => new MessageDigestPasswordEncoder('sha1'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder(new User('user', 'pass'));
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
@@ -72,9 +72,9 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetEncoderConfiguredForConcreteClassWithClassName()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\Tests\Encoder\SomeUser' => new MessageDigestPasswordEncoder('sha1'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder('Symfony\Component\Security\Core\Tests\Encoder\SomeChildUser');
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
@@ -83,10 +83,10 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetNamedEncoderForEncoderAware()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\Tests\Encoder\EncAwareUser' => new MessageDigestPasswordEncoder('sha256'),
             'encoder_name' => new MessageDigestPasswordEncoder('sha1'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder(new EncAwareUser('user', 'pass'));
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
@@ -95,10 +95,10 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetNullNamedEncoderForEncoderAware()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\Tests\Encoder\EncAwareUser' => new MessageDigestPasswordEncoder('sha1'),
             'encoder_name' => new MessageDigestPasswordEncoder('sha256'),
-        ));
+        ]);
 
         $user = new EncAwareUser('user', 'pass');
         $user->encoderName = null;
@@ -112,10 +112,10 @@ class EncoderFactoryTest extends TestCase
      */
     public function testGetInvalidNamedEncoderForEncoderAware()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\Tests\Encoder\EncAwareUser' => new MessageDigestPasswordEncoder('sha1'),
             'encoder_name' => new MessageDigestPasswordEncoder('sha256'),
-        ));
+        ]);
 
         $user = new EncAwareUser('user', 'pass');
         $user->encoderName = 'invalid_encoder_name';
@@ -124,10 +124,10 @@ class EncoderFactoryTest extends TestCase
 
     public function testGetEncoderForEncoderAwareWithClassName()
     {
-        $factory = new EncoderFactory(array(
+        $factory = new EncoderFactory([
             'Symfony\Component\Security\Core\Tests\Encoder\EncAwareUser' => new MessageDigestPasswordEncoder('sha1'),
             'encoder_name' => new MessageDigestPasswordEncoder('sha256'),
-        ));
+        ]);
 
         $encoder = $factory->getEncoder('Symfony\Component\Security\Core\Tests\Encoder\EncAwareUser');
         $expectedEncoder = new MessageDigestPasswordEncoder('sha1');
diff --git a/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php b/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
index 5776a99101..ebf94384c0 100644
--- a/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Exception/CustomUserMessageAuthenticationExceptionTest.php
@@ -18,10 +18,10 @@ class CustomUserMessageAuthenticationExceptionTest extends TestCase
 {
     public function testConstructWithSAfeMessage()
     {
-        $e = new CustomUserMessageAuthenticationException('SAFE MESSAGE', array('foo' => true));
+        $e = new CustomUserMessageAuthenticationException('SAFE MESSAGE', ['foo' => true]);
 
         $this->assertEquals('SAFE MESSAGE', $e->getMessageKey());
-        $this->assertEquals(array('foo' => true), $e->getMessageData());
+        $this->assertEquals(['foo' => true], $e->getMessageData());
         $this->assertEquals('SAFE MESSAGE', $e->getMessage());
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php b/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
index b7e5c556d7..8e256aac2e 100644
--- a/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Exception/UsernameNotFoundExceptionTest.php
@@ -19,8 +19,8 @@ class UsernameNotFoundExceptionTest extends TestCase
     public function testGetMessageData()
     {
         $exception = new UsernameNotFoundException('Username could not be found.');
-        $this->assertEquals(array('{{ username }}' => null), $exception->getMessageData());
+        $this->assertEquals(['{{ username }}' => null], $exception->getMessageData());
         $exception->setUsername('username');
-        $this->assertEquals(array('{{ username }}' => 'username'), $exception->getMessageData());
+        $this->assertEquals(['{{ username }}' => 'username'], $exception->getMessageData());
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php b/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
index 9e6b9d3a2b..4451f391ad 100644
--- a/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Role/RoleHierarchyTest.php
@@ -19,15 +19,15 @@ class RoleHierarchyTest extends TestCase
 {
     public function testGetReachableRoles()
     {
-        $role = new RoleHierarchy(array(
-            'ROLE_ADMIN' => array('ROLE_USER'),
-            'ROLE_SUPER_ADMIN' => array('ROLE_ADMIN', 'ROLE_FOO'),
-        ));
+        $role = new RoleHierarchy([
+            'ROLE_ADMIN' => ['ROLE_USER'],
+            'ROLE_SUPER_ADMIN' => ['ROLE_ADMIN', 'ROLE_FOO'],
+        ]);
 
-        $this->assertEquals(array(new Role('ROLE_USER')), $role->getReachableRoles(array(new Role('ROLE_USER'))));
-        $this->assertEquals(array(new Role('ROLE_FOO')), $role->getReachableRoles(array(new Role('ROLE_FOO'))));
-        $this->assertEquals(array(new Role('ROLE_ADMIN'), new Role('ROLE_USER')), $role->getReachableRoles(array(new Role('ROLE_ADMIN'))));
-        $this->assertEquals(array(new Role('ROLE_FOO'), new Role('ROLE_ADMIN'), new Role('ROLE_USER')), $role->getReachableRoles(array(new Role('ROLE_FOO'), new Role('ROLE_ADMIN'))));
-        $this->assertEquals(array(new Role('ROLE_SUPER_ADMIN'), new Role('ROLE_ADMIN'), new Role('ROLE_FOO'), new Role('ROLE_USER')), $role->getReachableRoles(array(new Role('ROLE_SUPER_ADMIN'))));
+        $this->assertEquals([new Role('ROLE_USER')], $role->getReachableRoles([new Role('ROLE_USER')]));
+        $this->assertEquals([new Role('ROLE_FOO')], $role->getReachableRoles([new Role('ROLE_FOO')]));
+        $this->assertEquals([new Role('ROLE_ADMIN'), new Role('ROLE_USER')], $role->getReachableRoles([new Role('ROLE_ADMIN')]));
+        $this->assertEquals([new Role('ROLE_FOO'), new Role('ROLE_ADMIN'), new Role('ROLE_USER')], $role->getReachableRoles([new Role('ROLE_FOO'), new Role('ROLE_ADMIN')]));
+        $this->assertEquals([new Role('ROLE_SUPER_ADMIN'), new Role('ROLE_ADMIN'), new Role('ROLE_FOO'), new Role('ROLE_USER')], $role->getReachableRoles([new Role('ROLE_SUPER_ADMIN')]));
     }
 }
diff --git a/src/Symfony/Component/Security/Core/Tests/SecurityTest.php b/src/Symfony/Component/Security/Core/Tests/SecurityTest.php
index bad5541926..83d876623b 100644
--- a/src/Symfony/Component/Security/Core/Tests/SecurityTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/SecurityTest.php
@@ -60,14 +60,14 @@ class SecurityTest extends TestCase
 
     public function getUserTests()
     {
-        yield array(null, null);
+        yield [null, null];
 
-        yield array('string_username', null);
+        yield ['string_username', null];
 
-        //yield array(new StringishUser(), null); // 5.0 behavior
+        //yield [new StringishUser(), null]; // 5.0 behavior
 
         $user = new User('nice_user', 'foo');
-        yield array($user, $user);
+        yield [$user, $user];
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
index 74bc42d624..067eef2497 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/ChainUserProviderTest.php
@@ -36,7 +36,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue($account = $this->getAccount()))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $this->assertSame($account, $provider->loadUserByUsername('foo'));
     }
 
@@ -61,7 +61,7 @@ class ChainUserProviderTest extends TestCase
             ->willThrowException(new UsernameNotFoundException('not found'))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $provider->loadUserByUsername('foo');
     }
 
@@ -81,7 +81,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue($account = $this->getAccount()))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $this->assertSame($account, $provider->refreshUser($this->getAccount()));
     }
 
@@ -101,7 +101,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue($account = $this->getAccount()))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $this->assertSame($account, $provider->refreshUser($this->getAccount()));
     }
 
@@ -124,7 +124,7 @@ class ChainUserProviderTest extends TestCase
             ->willThrowException(new UnsupportedUserException('unsupported'))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $provider->refreshUser($this->getAccount());
     }
 
@@ -146,7 +146,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue(true))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $this->assertTrue($provider->supportsClass('foo'));
     }
 
@@ -168,7 +168,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue(false))
         ;
 
-        $provider = new ChainUserProvider(array($provider1, $provider2));
+        $provider = new ChainUserProvider([$provider1, $provider2]);
         $this->assertFalse($provider->supportsClass('foo'));
     }
 
@@ -188,7 +188,7 @@ class ChainUserProviderTest extends TestCase
             ->will($this->returnValue($account = $this->getAccount()))
         ;
 
-        $provider = new ChainUserProvider(new \ArrayObject(array($provider1, $provider2)));
+        $provider = new ChainUserProvider(new \ArrayObject([$provider1, $provider2]));
         $this->assertSame($account, $provider->refreshUser($this->getAccount()));
     }
 
diff --git a/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
index 6647a76a12..b1ff3b66e1 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/InMemoryUserProviderTest.php
@@ -23,7 +23,7 @@ class InMemoryUserProviderTest extends TestCase
 
         $user = $provider->loadUserByUsername('fabien');
         $this->assertEquals('foo', $user->getPassword());
-        $this->assertEquals(array('ROLE_USER'), $user->getRoles());
+        $this->assertEquals(['ROLE_USER'], $user->getRoles());
         $this->assertFalse($user->isEnabled());
     }
 
@@ -35,7 +35,7 @@ class InMemoryUserProviderTest extends TestCase
 
         $refreshedUser = $provider->refreshUser($user);
         $this->assertEquals('foo', $refreshedUser->getPassword());
-        $this->assertEquals(array('ROLE_USER'), $refreshedUser->getRoles());
+        $this->assertEquals(['ROLE_USER'], $refreshedUser->getRoles());
         $this->assertFalse($refreshedUser->isEnabled());
         $this->assertFalse($refreshedUser->isCredentialsNonExpired());
     }
@@ -45,13 +45,13 @@ class InMemoryUserProviderTest extends TestCase
      */
     protected function createProvider()
     {
-        return new InMemoryUserProvider(array(
-            'fabien' => array(
+        return new InMemoryUserProvider([
+            'fabien' => [
                 'password' => 'foo',
                 'enabled' => false,
-                'roles' => array('ROLE_USER'),
-            ),
-        ));
+                'roles' => ['ROLE_USER'],
+            ],
+        ]);
     }
 
     public function testCreateUser()
diff --git a/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php b/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
index 2cecf70728..418475ac93 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/LdapUserProviderTest.php
@@ -123,10 +123,10 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array(
-                    'sAMAccountName' => array('foo'),
-                    'userpassword' => array('bar', 'baz'),
-                )
+            ->will($this->returnValue(new Entry('foo', [
+                    'sAMAccountName' => ['foo'],
+                    'userpassword' => ['bar', 'baz'],
+                ]
             )))
         ;
         $result
@@ -145,7 +145,7 @@ class LdapUserProviderTest extends TestCase
             ->will($this->returnValue($query))
         ;
 
-        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, array(), 'sAMAccountName', '({uid_key}={username})', 'userpassword');
+        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, [], 'sAMAccountName', '({uid_key}={username})', 'userpassword');
         $this->assertInstanceOf(
             'Symfony\Component\Security\Core\User\User',
             $provider->loadUserByUsername('foo')
@@ -166,7 +166,7 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array())))
+            ->will($this->returnValue(new Entry('foo', [])))
         ;
         $result
             ->expects($this->once())
@@ -184,7 +184,7 @@ class LdapUserProviderTest extends TestCase
             ->will($this->returnValue($query))
         ;
 
-        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, array(), 'sAMAccountName', '({uid_key}={username})');
+        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, [], 'sAMAccountName', '({uid_key}={username})');
         $this->assertInstanceOf(
             'Symfony\Component\Security\Core\User\User',
             $provider->loadUserByUsername('foo')
@@ -208,9 +208,9 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array(
-                    'sAMAccountName' => array('foo'),
-                )
+            ->will($this->returnValue(new Entry('foo', [
+                    'sAMAccountName' => ['foo'],
+                ]
             )))
         ;
         $result
@@ -229,7 +229,7 @@ class LdapUserProviderTest extends TestCase
             ->will($this->returnValue($query))
         ;
 
-        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, array(), 'sAMAccountName', '({uid_key}={username})', 'userpassword');
+        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, [], 'sAMAccountName', '({uid_key}={username})', 'userpassword');
         $this->assertInstanceOf(
             'Symfony\Component\Security\Core\User\User',
             $provider->loadUserByUsername('foo')
@@ -250,9 +250,9 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array(
-                    'sAMAccountName' => array('foo'),
-                )
+            ->will($this->returnValue(new Entry('foo', [
+                    'sAMAccountName' => ['foo'],
+                ]
             )))
         ;
         $result
@@ -292,9 +292,9 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array(
-                    'sAMAccountName' => array('foo'),
-                )
+            ->will($this->returnValue(new Entry('foo', [
+                    'sAMAccountName' => ['foo'],
+                ]
             )))
         ;
         $result
@@ -331,10 +331,10 @@ class LdapUserProviderTest extends TestCase
             ->expects($this->once())
             ->method('offsetGet')
             ->with(0)
-            ->will($this->returnValue(new Entry('foo', array(
-                    'sAMAccountName' => array('foo'),
-                    'userpassword' => array('bar'),
-                )
+            ->will($this->returnValue(new Entry('foo', [
+                    'sAMAccountName' => ['foo'],
+                    'userpassword' => ['bar'],
+                ]
             )))
         ;
         $result
@@ -353,7 +353,7 @@ class LdapUserProviderTest extends TestCase
             ->will($this->returnValue($query))
         ;
 
-        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, array(), 'sAMAccountName', '({uid_key}={username})', 'userpassword');
+        $provider = new LdapUserProvider($ldap, 'ou=MyBusiness,dc=symfony,dc=com', null, null, [], 'sAMAccountName', '({uid_key}={username})', 'userpassword');
         $this->assertInstanceOf(
             'Symfony\Component\Security\Core\User\User',
             $provider->loadUserByUsername('foo')
diff --git a/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php b/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
index 1d1d98ed12..ceacb3b2a3 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/UserCheckerTest.php
@@ -50,7 +50,7 @@ class UserCheckerTest extends TestCase
     public function testCheckPostAuthCredentialsExpired()
     {
         $checker = new UserChecker();
-        $checker->checkPostAuth(new User('John', 'password', array(), true, true, false, true));
+        $checker->checkPostAuth(new User('John', 'password', [], true, true, false, true));
     }
 
     /**
@@ -90,7 +90,7 @@ class UserCheckerTest extends TestCase
     public function testCheckPreAuthAccountLocked()
     {
         $checker = new UserChecker();
-        $checker->checkPreAuth(new User('John', 'password', array(), true, true, false, false));
+        $checker->checkPreAuth(new User('John', 'password', [], true, true, false, false));
     }
 
     /**
@@ -114,7 +114,7 @@ class UserCheckerTest extends TestCase
     public function testCheckPreAuthDisabled()
     {
         $checker = new UserChecker();
-        $checker->checkPreAuth(new User('John', 'password', array(), false, true, false, true));
+        $checker->checkPreAuth(new User('John', 'password', [], false, true, false, true));
     }
 
     /**
@@ -139,7 +139,7 @@ class UserCheckerTest extends TestCase
     public function testCheckPreAuthAccountExpired()
     {
         $checker = new UserChecker();
-        $checker->checkPreAuth(new User('John', 'password', array(), true, false, true, true));
+        $checker->checkPreAuth(new User('John', 'password', [], true, false, true, true));
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/Tests/User/UserTest.php b/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
index f052d85a1e..e132d01660 100644
--- a/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/User/UserTest.php
@@ -29,10 +29,10 @@ class UserTest extends TestCase
     public function testGetRoles()
     {
         $user = new User('fabien', 'superpass');
-        $this->assertEquals(array(), $user->getRoles());
+        $this->assertEquals([], $user->getRoles());
 
-        $user = new User('fabien', 'superpass', array('ROLE_ADMIN'));
-        $this->assertEquals(array('ROLE_ADMIN'), $user->getRoles());
+        $user = new User('fabien', 'superpass', ['ROLE_ADMIN']);
+        $this->assertEquals(['ROLE_ADMIN'], $user->getRoles());
     }
 
     public function testGetPassword()
@@ -58,7 +58,7 @@ class UserTest extends TestCase
         $user = new User('fabien', 'superpass');
         $this->assertTrue($user->isAccountNonExpired());
 
-        $user = new User('fabien', 'superpass', array(), true, false);
+        $user = new User('fabien', 'superpass', [], true, false);
         $this->assertFalse($user->isAccountNonExpired());
     }
 
@@ -67,7 +67,7 @@ class UserTest extends TestCase
         $user = new User('fabien', 'superpass');
         $this->assertTrue($user->isCredentialsNonExpired());
 
-        $user = new User('fabien', 'superpass', array(), true, true, false);
+        $user = new User('fabien', 'superpass', [], true, true, false);
         $this->assertFalse($user->isCredentialsNonExpired());
     }
 
@@ -76,7 +76,7 @@ class UserTest extends TestCase
         $user = new User('fabien', 'superpass');
         $this->assertTrue($user->isAccountNonLocked());
 
-        $user = new User('fabien', 'superpass', array(), true, true, true, false);
+        $user = new User('fabien', 'superpass', [], true, true, true, false);
         $this->assertFalse($user->isAccountNonLocked());
     }
 
@@ -85,7 +85,7 @@ class UserTest extends TestCase
         $user = new User('fabien', 'superpass');
         $this->assertTrue($user->isEnabled());
 
-        $user = new User('fabien', 'superpass', array(), false);
+        $user = new User('fabien', 'superpass', [], false);
         $this->assertFalse($user->isEnabled());
     }
 
@@ -117,16 +117,16 @@ class UserTest extends TestCase
 
     public static function isEqualToData()
     {
-        return array(
-            array(true, new User('username', 'password'), new User('username', 'password')),
-            array(true, new User('username', 'password', array('ROLE')), new User('username', 'password')),
-            array(true, new User('username', 'password', array('ROLE')), new User('username', 'password', array('NO ROLE'))),
-            array(false, new User('diff', 'diff'), new User('username', 'password')),
-            array(false, new User('diff', 'diff', array(), false), new User('username', 'password')),
-            array(false, new User('diff', 'diff', array(), false, false), new User('username', 'password')),
-            array(false, new User('diff', 'diff', array(), false, false, false), new User('username', 'password')),
-            array(false, new User('diff', 'diff', array(), false, false, false, false), new User('username', 'password')),
-        );
+        return [
+            [true, new User('username', 'password'), new User('username', 'password')],
+            [true, new User('username', 'password', ['ROLE']), new User('username', 'password')],
+            [true, new User('username', 'password', ['ROLE']), new User('username', 'password', ['NO ROLE'])],
+            [false, new User('diff', 'diff'), new User('username', 'password')],
+            [false, new User('diff', 'diff', [], false), new User('username', 'password')],
+            [false, new User('diff', 'diff', [], false, false), new User('username', 'password')],
+            [false, new User('diff', 'diff', [], false, false, false), new User('username', 'password')],
+            [false, new User('diff', 'diff', [], false, false, false, false), new User('username', 'password')],
+        ];
     }
 
     public function testIsEqualToWithDifferentUser()
diff --git a/src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php b/src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php
index 22bed799fb..24c2c7adda 100644
--- a/src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php
+++ b/src/Symfony/Component/Security/Core/Tests/Validator/Constraints/UserPasswordValidatorTest.php
@@ -58,9 +58,9 @@ abstract class UserPasswordValidatorTest extends ConstraintValidatorTestCase
 
     public function testPasswordIsValid()
     {
-        $constraint = new UserPassword(array(
+        $constraint = new UserPassword([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->encoder->expects($this->once())
             ->method('isPasswordValid')
@@ -74,9 +74,9 @@ abstract class UserPasswordValidatorTest extends ConstraintValidatorTestCase
 
     public function testPasswordIsNotValid()
     {
-        $constraint = new UserPassword(array(
+        $constraint = new UserPassword([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->encoder->expects($this->once())
             ->method('isPasswordValid')
@@ -94,9 +94,9 @@ abstract class UserPasswordValidatorTest extends ConstraintValidatorTestCase
      */
     public function testEmptyPasswordsAreNotValid($password)
     {
-        $constraint = new UserPassword(array(
+        $constraint = new UserPassword([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($password, $constraint);
 
@@ -106,10 +106,10 @@ abstract class UserPasswordValidatorTest extends ConstraintValidatorTestCase
 
     public function emptyPasswordData()
     {
-        return array(
-            array(null),
-            array(''),
-        );
+        return [
+            [null],
+            [''],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php b/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
index 199d95f90c..a5ad3f10f5 100644
--- a/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/InMemoryUserProvider.php
@@ -32,12 +32,12 @@ class InMemoryUserProvider implements UserProviderInterface
      *
      * @param array $users An array of users
      */
-    public function __construct(array $users = array())
+    public function __construct(array $users = [])
     {
         foreach ($users as $username => $attributes) {
             $password = isset($attributes['password']) ? $attributes['password'] : null;
             $enabled = isset($attributes['enabled']) ? $attributes['enabled'] : true;
-            $roles = isset($attributes['roles']) ? $attributes['roles'] : array();
+            $roles = isset($attributes['roles']) ? $attributes['roles'] : [];
             $user = new User($username, $password, $roles, $enabled, true, true, true);
 
             $this->createUser($user);
diff --git a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
index 01b6b6d3d3..adb820fcca 100644
--- a/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
+++ b/src/Symfony/Component/Security/Core/User/LdapUserProvider.php
@@ -35,7 +35,7 @@ class LdapUserProvider implements UserProviderInterface
     private $defaultSearch;
     private $passwordAttribute;
 
-    public function __construct(LdapInterface $ldap, string $baseDn, string $searchDn = null, string $searchPassword = null, array $defaultRoles = array(), string $uidKey = null, string $filter = null, string $passwordAttribute = null)
+    public function __construct(LdapInterface $ldap, string $baseDn, string $searchDn = null, string $searchPassword = null, array $defaultRoles = [], string $uidKey = null, string $filter = null, string $passwordAttribute = null)
     {
         if (null === $uidKey) {
             $uidKey = 'sAMAccountName';
diff --git a/src/Symfony/Component/Security/Core/User/User.php b/src/Symfony/Component/Security/Core/User/User.php
index 4d612798f2..18faeb7af0 100644
--- a/src/Symfony/Component/Security/Core/User/User.php
+++ b/src/Symfony/Component/Security/Core/User/User.php
@@ -28,7 +28,7 @@ final class User implements UserInterface, EquatableInterface, AdvancedUserInter
     private $accountNonLocked;
     private $roles;
 
-    public function __construct(?string $username, ?string $password, array $roles = array(), bool $enabled = true, bool $userNonExpired = true, bool $credentialsNonExpired = true, bool $userNonLocked = true)
+    public function __construct(?string $username, ?string $password, array $roles = [], bool $enabled = true, bool $userNonExpired = true, bool $credentialsNonExpired = true, bool $userNonLocked = true)
     {
         if ('' === $username || null === $username) {
             throw new \InvalidArgumentException('The username cannot be empty.');
diff --git a/src/Symfony/Component/Security/Core/User/UserInterface.php b/src/Symfony/Component/Security/Core/User/UserInterface.php
index da28bf7d61..043ca81580 100644
--- a/src/Symfony/Component/Security/Core/User/UserInterface.php
+++ b/src/Symfony/Component/Security/Core/User/UserInterface.php
@@ -37,7 +37,7 @@ interface UserInterface
      *
      *     public function getRoles()
      *     {
-     *         return array('ROLE_USER');
+     *         return ['ROLE_USER'];
      *     }
      *
      * Alternatively, the roles might be stored on a ``roles`` property,
diff --git a/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php b/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
index 2ec282144c..b954fc037b 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/CsrfTokenManagerTest.php
@@ -163,7 +163,7 @@ class CsrfTokenManagerTest extends TestCase
         $storage = $this->getMockBuilder('Symfony\Component\Security\Csrf\TokenStorage\TokenStorageInterface')->getMock();
 
         $requestStack = new RequestStack();
-        $requestStack->push(new Request(array(), array(), array(), array(), array(), array('HTTPS' => 'on')));
+        $requestStack->push(new Request([], [], [], [], [], ['HTTPS' => 'on']));
 
         $manager = new CsrfTokenManager($generator, $storage, null, $requestStack);
 
@@ -173,41 +173,41 @@ class CsrfTokenManagerTest extends TestCase
 
     public function getManagerGeneratorAndStorage()
     {
-        $data = array();
+        $data = [];
 
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('', new CsrfTokenManager($generator, $storage, ''), $storage, $generator);
+        $data[] = ['', new CsrfTokenManager($generator, $storage, ''), $storage, $generator];
 
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('https-', new CsrfTokenManager($generator, $storage), $storage, $generator);
+        $data[] = ['https-', new CsrfTokenManager($generator, $storage), $storage, $generator];
 
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('aNamespace-', new CsrfTokenManager($generator, $storage, 'aNamespace-'), $storage, $generator);
+        $data[] = ['aNamespace-', new CsrfTokenManager($generator, $storage, 'aNamespace-'), $storage, $generator];
 
         $requestStack = new RequestStack();
-        $requestStack->push(new Request(array(), array(), array(), array(), array(), array('HTTPS' => 'on')));
+        $requestStack->push(new Request([], [], [], [], [], ['HTTPS' => 'on']));
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('https-', new CsrfTokenManager($generator, $storage, $requestStack), $storage, $generator);
+        $data[] = ['https-', new CsrfTokenManager($generator, $storage, $requestStack), $storage, $generator];
 
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('generated-', new CsrfTokenManager($generator, $storage, function () {
+        $data[] = ['generated-', new CsrfTokenManager($generator, $storage, function () {
             return 'generated-';
-        }), $storage, $generator);
+        }), $storage, $generator];
 
         $requestStack = new RequestStack();
         $requestStack->push(new Request());
         list($generator, $storage) = $this->getGeneratorAndStorage();
-        $data[] = array('', new CsrfTokenManager($generator, $storage, $requestStack), $storage, $generator);
+        $data[] = ['', new CsrfTokenManager($generator, $storage, $requestStack), $storage, $generator];
 
         return $data;
     }
 
     private function getGeneratorAndStorage()
     {
-        return array(
+        return [
             $this->getMockBuilder('Symfony\Component\Security\Csrf\TokenGenerator\TokenGeneratorInterface')->getMock(),
             $this->getMockBuilder('Symfony\Component\Security\Csrf\TokenStorage\TokenStorageInterface')->getMock(),
-        );
+        ];
     }
 
     protected function setUp()
diff --git a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
index c8d31093ce..86fb6e6b9c 100644
--- a/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
+++ b/src/Symfony/Component/Security/Csrf/Tests/TokenStorage/NativeSessionTokenStorageTest.php
@@ -31,7 +31,7 @@ class NativeSessionTokenStorageTest extends TestCase
 
     protected function setUp()
     {
-        $_SESSION = array();
+        $_SESSION = [];
 
         $this->storage = new NativeSessionTokenStorage(self::SESSION_NAMESPACE);
     }
@@ -40,7 +40,7 @@ class NativeSessionTokenStorageTest extends TestCase
     {
         $this->storage->setToken('token_id', 'TOKEN');
 
-        $this->assertSame(array(self::SESSION_NAMESPACE => array('token_id' => 'TOKEN')), $_SESSION);
+        $this->assertSame([self::SESSION_NAMESPACE => ['token_id' => 'TOKEN']], $_SESSION);
     }
 
     public function testStoreTokenInClosedSessionWithExistingSessionId()
@@ -52,7 +52,7 @@ class NativeSessionTokenStorageTest extends TestCase
         $this->storage->setToken('token_id', 'TOKEN');
 
         $this->assertSame(PHP_SESSION_ACTIVE, session_status());
-        $this->assertSame(array(self::SESSION_NAMESPACE => array('token_id' => 'TOKEN')), $_SESSION);
+        $this->assertSame([self::SESSION_NAMESPACE => ['token_id' => 'TOKEN']], $_SESSION);
     }
 
     public function testStoreTokenInActiveSession()
@@ -61,7 +61,7 @@ class NativeSessionTokenStorageTest extends TestCase
 
         $this->storage->setToken('token_id', 'TOKEN');
 
-        $this->assertSame(array(self::SESSION_NAMESPACE => array('token_id' => 'TOKEN')), $_SESSION);
+        $this->assertSame([self::SESSION_NAMESPACE => ['token_id' => 'TOKEN']], $_SESSION);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Guard/AuthenticatorInterface.php b/src/Symfony/Component/Security/Guard/AuthenticatorInterface.php
index 10577d74cd..851241f08a 100644
--- a/src/Symfony/Component/Security/Guard/AuthenticatorInterface.php
+++ b/src/Symfony/Component/Security/Guard/AuthenticatorInterface.php
@@ -51,14 +51,14 @@ interface AuthenticatorInterface extends AuthenticationEntryPointInterface
      *
      * For example, for a form login, you might:
      *
-     *      return array(
+     *      return [
      *          'username' => $request->request->get('_username'),
      *          'password' => $request->request->get('_password'),
-     *      );
+     *      ];
      *
      * Or for an API token that's on a header, you might use:
      *
-     *      return array('api_key' => $request->headers->get('X-API-TOKEN'));
+     *      return ['api_key' => $request->headers->get('X-API-TOKEN')];
      *
      * @param Request $request
      *
diff --git a/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php b/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
index db02bcd18e..663a82e8c5 100644
--- a/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Guard/Firewall/GuardAuthenticationListener.php
@@ -65,7 +65,7 @@ class GuardAuthenticationListener implements ListenerInterface
     public function handle(GetResponseEvent $event)
     {
         if (null !== $this->logger) {
-            $context = array('firewall_key' => $this->providerKey);
+            $context = ['firewall_key' => $this->providerKey];
 
             if ($this->guardAuthenticators instanceof \Countable || \is_array($this->guardAuthenticators)) {
                 $context['authenticators'] = \count($this->guardAuthenticators);
@@ -83,7 +83,7 @@ class GuardAuthenticationListener implements ListenerInterface
 
             if ($event->hasResponse()) {
                 if (null !== $this->logger) {
-                    $this->logger->debug('The "{authenticator}" authenticator set the response. Any later authenticator will not be called', array('authenticator' => \get_class($guardAuthenticator)));
+                    $this->logger->debug('The "{authenticator}" authenticator set the response. Any later authenticator will not be called', ['authenticator' => \get_class($guardAuthenticator)]);
                 }
 
                 break;
@@ -96,20 +96,20 @@ class GuardAuthenticationListener implements ListenerInterface
         $request = $event->getRequest();
         try {
             if (null !== $this->logger) {
-                $this->logger->debug('Checking support on guard authenticator.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Checking support on guard authenticator.', ['firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)]);
             }
 
             // abort the execution of the authenticator if it doesn't support the request
             if (!$guardAuthenticator->supports($request)) {
                 if (null !== $this->logger) {
-                    $this->logger->debug('Guard authenticator does not support the request.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
+                    $this->logger->debug('Guard authenticator does not support the request.', ['firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)]);
                 }
 
                 return;
             }
 
             if (null !== $this->logger) {
-                $this->logger->debug('Calling getCredentials() on guard authenticator.', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Calling getCredentials() on guard authenticator.', ['firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)]);
             }
 
             // allow the authenticator to fetch authentication info from the request
@@ -123,14 +123,14 @@ class GuardAuthenticationListener implements ListenerInterface
             $token = new PreAuthenticationGuardToken($credentials, $uniqueGuardKey);
 
             if (null !== $this->logger) {
-                $this->logger->debug('Passing guard token information to the GuardAuthenticationProvider', array('firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Passing guard token information to the GuardAuthenticationProvider', ['firewall_key' => $this->providerKey, 'authenticator' => \get_class($guardAuthenticator)]);
             }
             // pass the token into the AuthenticationManager system
             // this indirectly calls GuardAuthenticationProvider::authenticate()
             $token = $this->authenticationManager->authenticate($token);
 
             if (null !== $this->logger) {
-                $this->logger->info('Guard authentication successful!', array('token' => $token, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->info('Guard authentication successful!', ['token' => $token, 'authenticator' => \get_class($guardAuthenticator)]);
             }
 
             // sets the token on the token storage, etc
@@ -139,7 +139,7 @@ class GuardAuthenticationListener implements ListenerInterface
             // oh no! Authentication failed!
 
             if (null !== $this->logger) {
-                $this->logger->info('Guard authentication failed.', array('exception' => $e, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->info('Guard authentication failed.', ['exception' => $e, 'authenticator' => \get_class($guardAuthenticator)]);
             }
 
             $response = $this->guardHandler->handleAuthenticationFailure($e, $request, $guardAuthenticator, $this->providerKey);
@@ -155,13 +155,13 @@ class GuardAuthenticationListener implements ListenerInterface
         $response = $this->guardHandler->handleAuthenticationSuccess($token, $request, $guardAuthenticator, $this->providerKey);
         if ($response instanceof Response) {
             if (null !== $this->logger) {
-                $this->logger->debug('Guard authenticator set success response.', array('response' => $response, 'authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Guard authenticator set success response.', ['response' => $response, 'authenticator' => \get_class($guardAuthenticator)]);
             }
 
             $event->setResponse($response);
         } else {
             if (null !== $this->logger) {
-                $this->logger->debug('Guard authenticator set no success response: request continues.', array('authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Guard authenticator set no success response: request continues.', ['authenticator' => \get_class($guardAuthenticator)]);
             }
         }
 
@@ -185,7 +185,7 @@ class GuardAuthenticationListener implements ListenerInterface
     {
         if (null === $this->rememberMeServices) {
             if (null !== $this->logger) {
-                $this->logger->debug('Remember me skipped: it is not configured for the firewall.', array('authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Remember me skipped: it is not configured for the firewall.', ['authenticator' => \get_class($guardAuthenticator)]);
             }
 
             return;
@@ -193,7 +193,7 @@ class GuardAuthenticationListener implements ListenerInterface
 
         if (!$guardAuthenticator->supportsRememberMe()) {
             if (null !== $this->logger) {
-                $this->logger->debug('Remember me skipped: your authenticator does not support it.', array('authenticator' => \get_class($guardAuthenticator)));
+                $this->logger->debug('Remember me skipped: your authenticator does not support it.', ['authenticator' => \get_class($guardAuthenticator)]);
             }
 
             return;
diff --git a/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php b/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
index f7dfbb469a..1f7e157f44 100644
--- a/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
+++ b/src/Symfony/Component/Security/Guard/GuardAuthenticatorHandler.php
@@ -42,7 +42,7 @@ class GuardAuthenticatorHandler
     /**
      * @param array $statelessProviderKeys An array of provider/firewall keys that are "stateless" and so do not need the session migrated on success
      */
-    public function __construct(TokenStorageInterface $tokenStorage, EventDispatcherInterface $eventDispatcher = null, array $statelessProviderKeys = array())
+    public function __construct(TokenStorageInterface $tokenStorage, EventDispatcherInterface $eventDispatcher = null, array $statelessProviderKeys = [])
     {
         $this->tokenStorage = $tokenStorage;
         $this->dispatcher = $eventDispatcher;
diff --git a/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php b/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
index 5b56059986..bbc44c8b0a 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Authenticator/FormLoginAuthenticatorTest.php
@@ -77,8 +77,8 @@ class FormLoginAuthenticatorTest extends TestCase
 
     protected function setUp()
     {
-        $this->requestWithoutSession = new Request(array(), array(), array(), array(), array(), array());
-        $this->requestWithSession = new Request(array(), array(), array(), array(), array(), array());
+        $this->requestWithoutSession = new Request([], [], [], [], [], []);
+        $this->requestWithSession = new Request([], [], [], [], [], []);
 
         $session = $this->getMockBuilder('Symfony\\Component\\HttpFoundation\\Session\\SessionInterface')
             ->disableOriginalConstructor()
diff --git a/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php b/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
index 87c1512c47..5a95eb6ae7 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Firewall/GuardAuthenticationListenerTest.php
@@ -39,7 +39,7 @@ class GuardAuthenticationListenerTest extends TestCase
         $authenticateToken = $this->getMockBuilder(TokenInterface::class)->getMock();
         $providerKey = 'my_firewall';
 
-        $credentials = array('username' => 'weaverryan', 'password' => 'all_your_base');
+        $credentials = ['username' => 'weaverryan', 'password' => 'all_your_base'];
 
         $authenticator
             ->expects($this->once())
@@ -75,7 +75,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             $providerKey,
-            array($authenticator),
+            [$authenticator],
             $this->logger
         );
 
@@ -115,7 +115,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             'my_firewall',
-            array($authenticator1, $authenticator2),
+            [$authenticator1, $authenticator2],
             $this->logger
         );
 
@@ -137,7 +137,7 @@ class GuardAuthenticationListenerTest extends TestCase
             ->expects($this->once())
             ->method('getCredentials')
             ->with($this->equalTo($this->request))
-            ->will($this->returnValue(array('username' => 'anything_not_empty')));
+            ->will($this->returnValue(['username' => 'anything_not_empty']));
 
         $this->authenticationManager
             ->expects($this->once())
@@ -154,7 +154,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             $providerKey,
-            array($authenticator),
+            [$authenticator],
             $this->logger
         );
 
@@ -199,7 +199,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             $providerKey,
-            array($authenticator),
+            [$authenticator],
             $this->logger
         );
 
@@ -225,7 +225,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             $providerKey,
-            array($authenticator),
+            [$authenticator],
             $this->logger
         );
 
@@ -255,7 +255,7 @@ class GuardAuthenticationListenerTest extends TestCase
             $this->guardAuthenticatorHandler,
             $this->authenticationManager,
             $providerKey,
-            array($authenticator),
+            [$authenticator],
             $this->logger
         );
 
@@ -272,11 +272,11 @@ class GuardAuthenticationListenerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $this->request = new Request(array(), array(), array(), array(), array(), array());
+        $this->request = new Request([], [], [], [], [], []);
 
         $this->event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\GetResponseEvent')
             ->disableOriginalConstructor()
-            ->setMethods(array('getRequest'))
+            ->setMethods(['getRequest'])
             ->getMock();
         $this->event
             ->expects($this->any())
diff --git a/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php b/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
index 6f0bb6248a..9950426de9 100644
--- a/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/GuardAuthenticatorHandlerTest.php
@@ -110,11 +110,11 @@ class GuardAuthenticatorHandlerTest extends TestCase
 
     public function getTokenClearingTests()
     {
-        $tests = array();
+        $tests = [];
         // correct token class and matching firewall => clear the token
-        $tests[] = array('Symfony\Component\Security\Guard\Token\PostAuthenticationGuardToken', 'the_firewall_key', 'the_firewall_key');
-        $tests[] = array('Symfony\Component\Security\Guard\Token\PostAuthenticationGuardToken', 'the_firewall_key', 'different_key');
-        $tests[] = array('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', 'the_firewall_key', 'the_firewall_key');
+        $tests[] = ['Symfony\Component\Security\Guard\Token\PostAuthenticationGuardToken', 'the_firewall_key', 'the_firewall_key'];
+        $tests[] = ['Symfony\Component\Security\Guard\Token\PostAuthenticationGuardToken', 'the_firewall_key', 'different_key'];
+        $tests[] = ['Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', 'the_firewall_key', 'the_firewall_key'];
 
         return $tests;
     }
@@ -151,7 +151,7 @@ class GuardAuthenticatorHandlerTest extends TestCase
         $this->sessionStrategy->expects($this->never())
             ->method('onAuthentication');
 
-        $handler = new GuardAuthenticatorHandler($this->tokenStorage, $this->dispatcher, array('some_provider_key'));
+        $handler = new GuardAuthenticatorHandler($this->tokenStorage, $this->dispatcher, ['some_provider_key']);
         $handler->setSessionAuthenticationStrategy($this->sessionStrategy);
         $handler->authenticateWithToken($this->token, $this->request, 'some_provider_key');
     }
@@ -161,7 +161,7 @@ class GuardAuthenticatorHandlerTest extends TestCase
         $this->tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $this->dispatcher = $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
         $this->token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
-        $this->request = new Request(array(), array(), array(), array(), array(), array());
+        $this->request = new Request([], [], [], [], [], []);
         $this->sessionStrategy = $this->getMockBuilder('Symfony\Component\Security\Http\Session\SessionAuthenticationStrategyInterface')->getMock();
         $this->guardAuthenticator = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
     }
diff --git a/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php b/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
index 12de6e8c26..622ab4336e 100644
--- a/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
+++ b/src/Symfony/Component/Security/Guard/Tests/Provider/GuardAuthenticationProviderTest.php
@@ -35,7 +35,7 @@ class GuardAuthenticationProviderTest extends TestCase
         $authenticatorA = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
         $authenticatorB = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
         $authenticatorC = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
-        $authenticators = array($authenticatorA, $authenticatorB, $authenticatorC);
+        $authenticators = [$authenticatorA, $authenticatorB, $authenticatorC];
 
         // called 2 times - for authenticator A and B (stops on B because of match)
         $this->preAuthenticationToken->expects($this->exactly(2))
@@ -43,10 +43,10 @@ class GuardAuthenticationProviderTest extends TestCase
             // it will return the "1" index, which will match authenticatorB
             ->will($this->returnValue('my_cool_firewall_1'));
 
-        $enteredCredentials = array(
+        $enteredCredentials = [
             'username' => '_weaverryan_test_user',
             'password' => 'guard_auth_ftw',
-        );
+        ];
         $this->preAuthenticationToken->expects($this->atLeastOnce())
             ->method('getCredentials')
             ->will($this->returnValue($enteredCredentials));
@@ -116,7 +116,7 @@ class GuardAuthenticationProviderTest extends TestCase
             // authentication fails :(
             ->will($this->returnValue(null));
 
-        $provider = new GuardAuthenticationProvider(array($authenticator), $this->userProvider, $providerKey, $this->userChecker);
+        $provider = new GuardAuthenticationProvider([$authenticator], $this->userProvider, $providerKey, $this->userChecker);
         $provider->authenticate($this->preAuthenticationToken);
     }
 
@@ -130,10 +130,10 @@ class GuardAuthenticationProviderTest extends TestCase
         // create a token and mark it as NOT authenticated anymore
         // this mimics what would happen if a user "changed" between request
         $mockedUser = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
-        $token = new PostAuthenticationGuardToken($mockedUser, $providerKey, array('ROLE_USER'));
+        $token = new PostAuthenticationGuardToken($mockedUser, $providerKey, ['ROLE_USER']);
         $token->setAuthenticated(false);
 
-        $provider = new GuardAuthenticationProvider(array(), $this->userProvider, $providerKey, $this->userChecker);
+        $provider = new GuardAuthenticationProvider([], $this->userProvider, $providerKey, $this->userChecker);
         $actualToken = $provider->authenticate($token);
     }
 
@@ -141,7 +141,7 @@ class GuardAuthenticationProviderTest extends TestCase
     {
         $authenticatorA = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
         $authenticatorB = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
-        $authenticators = array($authenticatorA, $authenticatorB);
+        $authenticators = [$authenticatorA, $authenticatorB];
 
         $mockedUser = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $provider = new GuardAuthenticationProvider($authenticators, $this->userProvider, 'first_firewall', $this->userChecker);
@@ -162,7 +162,7 @@ class GuardAuthenticationProviderTest extends TestCase
     public function testAuthenticateFailsOnNonOriginatingToken()
     {
         $authenticatorA = $this->getMockBuilder(AuthenticatorInterface::class)->getMock();
-        $authenticators = array($authenticatorA);
+        $authenticators = [$authenticatorA];
 
         $mockedUser = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $provider = new GuardAuthenticationProvider($authenticators, $this->userProvider, 'first_firewall', $this->userChecker);
diff --git a/src/Symfony/Component/Security/Guard/Token/PostAuthenticationGuardToken.php b/src/Symfony/Component/Security/Guard/Token/PostAuthenticationGuardToken.php
index ad479ac24e..55ffbbf71d 100644
--- a/src/Symfony/Component/Security/Guard/Token/PostAuthenticationGuardToken.php
+++ b/src/Symfony/Component/Security/Guard/Token/PostAuthenticationGuardToken.php
@@ -58,7 +58,7 @@ class PostAuthenticationGuardToken extends AbstractToken implements GuardTokenIn
      */
     public function getCredentials()
     {
-        return array();
+        return [];
     }
 
     /**
@@ -76,7 +76,7 @@ class PostAuthenticationGuardToken extends AbstractToken implements GuardTokenIn
      */
     public function serialize()
     {
-        return serialize(array($this->providerKey, parent::serialize()));
+        return serialize([$this->providerKey, parent::serialize()]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Guard/Token/PreAuthenticationGuardToken.php b/src/Symfony/Component/Security/Guard/Token/PreAuthenticationGuardToken.php
index 9f1c046e4c..49e08882b8 100644
--- a/src/Symfony/Component/Security/Guard/Token/PreAuthenticationGuardToken.php
+++ b/src/Symfony/Component/Security/Guard/Token/PreAuthenticationGuardToken.php
@@ -36,7 +36,7 @@ class PreAuthenticationGuardToken extends AbstractToken implements GuardTokenInt
         $this->credentials = $credentials;
         $this->guardProviderKey = $guardProviderKey;
 
-        parent::__construct(array());
+        parent::__construct([]);
 
         // never authenticated
         parent::setAuthenticated(false);
diff --git a/src/Symfony/Component/Security/Http/AccessMap.php b/src/Symfony/Component/Security/Http/AccessMap.php
index 2f3757336e..04c06da107 100644
--- a/src/Symfony/Component/Security/Http/AccessMap.php
+++ b/src/Symfony/Component/Security/Http/AccessMap.php
@@ -22,16 +22,16 @@ use Symfony\Component\HttpFoundation\RequestMatcherInterface;
  */
 class AccessMap implements AccessMapInterface
 {
-    private $map = array();
+    private $map = [];
 
     /**
      * @param RequestMatcherInterface $requestMatcher A RequestMatcherInterface instance
      * @param array                   $attributes     An array of attributes to pass to the access decision manager (like roles)
      * @param string|null             $channel        The channel to enforce (http, https, or null)
      */
-    public function add(RequestMatcherInterface $requestMatcher, array $attributes = array(), $channel = null)
+    public function add(RequestMatcherInterface $requestMatcher, array $attributes = [], $channel = null)
     {
-        $this->map[] = array($requestMatcher, $attributes, $channel);
+        $this->map[] = [$requestMatcher, $attributes, $channel];
     }
 
     /**
@@ -41,10 +41,10 @@ class AccessMap implements AccessMapInterface
     {
         foreach ($this->map as $elements) {
             if (null === $elements[0] || $elements[0]->matches($request)) {
-                return array($elements[1], $elements[2]);
+                return [$elements[1], $elements[2]];
             }
         }
 
-        return array(null, null);
+        return [null, null];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationFailureHandler.php b/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationFailureHandler.php
index ad1e4cb194..cca62fd4c5 100644
--- a/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationFailureHandler.php
+++ b/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationFailureHandler.php
@@ -35,14 +35,14 @@ class DefaultAuthenticationFailureHandler implements AuthenticationFailureHandle
     protected $httpUtils;
     protected $logger;
     protected $options;
-    protected $defaultOptions = array(
+    protected $defaultOptions = [
         'failure_path' => null,
         'failure_forward' => false,
         'login_path' => '/login',
         'failure_path_parameter' => '_failure_path',
-    );
+    ];
 
-    public function __construct(HttpKernelInterface $httpKernel, HttpUtils $httpUtils, array $options = array(), LoggerInterface $logger = null)
+    public function __construct(HttpKernelInterface $httpKernel, HttpUtils $httpUtils, array $options = [], LoggerInterface $logger = null)
     {
         $this->httpKernel = $httpKernel;
         $this->httpUtils = $httpUtils;
@@ -80,7 +80,7 @@ class DefaultAuthenticationFailureHandler implements AuthenticationFailureHandle
 
         if ($this->options['failure_forward']) {
             if (null !== $this->logger) {
-                $this->logger->debug('Authentication failure, forward triggered.', array('failure_path' => $this->options['failure_path']));
+                $this->logger->debug('Authentication failure, forward triggered.', ['failure_path' => $this->options['failure_path']]);
             }
 
             $subRequest = $this->httpUtils->createRequest($request, $this->options['failure_path']);
@@ -90,7 +90,7 @@ class DefaultAuthenticationFailureHandler implements AuthenticationFailureHandle
         }
 
         if (null !== $this->logger) {
-            $this->logger->debug('Authentication failure, redirect triggered.', array('failure_path' => $this->options['failure_path']));
+            $this->logger->debug('Authentication failure, redirect triggered.', ['failure_path' => $this->options['failure_path']]);
         }
 
         $request->getSession()->set(Security::AUTHENTICATION_ERROR, $exception);
diff --git a/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationSuccessHandler.php b/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationSuccessHandler.php
index 38d16a6f75..8b65dc9ee5 100644
--- a/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationSuccessHandler.php
+++ b/src/Symfony/Component/Security/Http/Authentication/DefaultAuthenticationSuccessHandler.php
@@ -31,19 +31,19 @@ class DefaultAuthenticationSuccessHandler implements AuthenticationSuccessHandle
     protected $httpUtils;
     protected $options;
     protected $providerKey;
-    protected $defaultOptions = array(
+    protected $defaultOptions = [
         'always_use_default_target_path' => false,
         'default_target_path' => '/',
         'login_path' => '/login',
         'target_path_parameter' => '_target_path',
         'use_referer' => false,
-    );
+    ];
 
     /**
      * @param HttpUtils $httpUtils
      * @param array     $options   Options for processing a successful authentication attempt
      */
-    public function __construct(HttpUtils $httpUtils, array $options = array())
+    public function __construct(HttpUtils $httpUtils, array $options = [])
     {
         $this->httpUtils = $httpUtils;
         $this->setOptions($options);
diff --git a/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php b/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
index 24647e36c7..e03a5e608d 100644
--- a/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
+++ b/src/Symfony/Component/Security/Http/Authentication/SimpleAuthenticationHandler.php
@@ -59,7 +59,7 @@ class SimpleAuthenticationHandler implements AuthenticationFailureHandlerInterfa
     {
         if ($this->simpleAuthenticator instanceof AuthenticationSuccessHandlerInterface) {
             if ($this->logger) {
-                $this->logger->debug('Selected an authentication success handler.', array('handler' => \get_class($this->simpleAuthenticator)));
+                $this->logger->debug('Selected an authentication success handler.', ['handler' => \get_class($this->simpleAuthenticator)]);
             }
 
             $response = $this->simpleAuthenticator->onAuthenticationSuccess($request, $token);
@@ -86,7 +86,7 @@ class SimpleAuthenticationHandler implements AuthenticationFailureHandlerInterfa
     {
         if ($this->simpleAuthenticator instanceof AuthenticationFailureHandlerInterface) {
             if ($this->logger) {
-                $this->logger->debug('Selected an authentication failure handler.', array('handler' => \get_class($this->simpleAuthenticator)));
+                $this->logger->debug('Selected an authentication failure handler.', ['handler' => \get_class($this->simpleAuthenticator)]);
             }
 
             $response = $this->simpleAuthenticator->onAuthenticationFailure($request, $exception);
diff --git a/src/Symfony/Component/Security/Http/Firewall.php b/src/Symfony/Component/Security/Http/Firewall.php
index df665ba088..79ba93108e 100644
--- a/src/Symfony/Component/Security/Http/Firewall.php
+++ b/src/Symfony/Component/Security/Http/Firewall.php
@@ -105,10 +105,10 @@ class Firewall implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(
-            KernelEvents::REQUEST => array('onKernelRequest', 8),
+        return [
+            KernelEvents::REQUEST => ['onKernelRequest', 8],
             KernelEvents::FINISH_REQUEST => 'onKernelFinishRequest',
-        );
+        ];
     }
 
     protected function handleRequest(GetResponseEvent $event, $listeners)
diff --git a/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php
index cdf91242dd..a46e59063d 100644
--- a/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php
@@ -66,7 +66,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
     /**
      * @throws \InvalidArgumentException
      */
-    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = array(), LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null)
+    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = [], LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null)
     {
         if (empty($providerKey)) {
             throw new \InvalidArgumentException('$providerKey must not be empty.');
@@ -78,7 +78,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
         $this->providerKey = $providerKey;
         $this->successHandler = $successHandler;
         $this->failureHandler = $failureHandler;
-        $this->options = array_merge(array(
+        $this->options = array_merge([
             'check_path' => '/login_check',
             'login_path' => '/login',
             'always_use_default_target_path' => false,
@@ -88,7 +88,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
             'failure_path' => null,
             'failure_forward' => false,
             'require_previous_session' => true,
-        ), $options);
+        ], $options);
         $this->logger = $logger;
         $this->dispatcher = $dispatcher;
         $this->httpUtils = $httpUtils;
@@ -171,7 +171,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
     private function onFailure(Request $request, AuthenticationException $failed)
     {
         if (null !== $this->logger) {
-            $this->logger->info('Authentication request failed.', array('exception' => $failed));
+            $this->logger->info('Authentication request failed.', ['exception' => $failed]);
         }
 
         $token = $this->tokenStorage->getToken();
@@ -191,7 +191,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
     private function onSuccess(Request $request, TokenInterface $token)
     {
         if (null !== $this->logger) {
-            $this->logger->info('User has been authenticated successfully.', array('username' => $token->getUsername()));
+            $this->logger->info('User has been authenticated successfully.', ['username' => $token->getUsername()]);
         }
 
         $this->tokenStorage->setToken($token);
diff --git a/src/Symfony/Component/Security/Http/Firewall/AbstractPreAuthenticatedListener.php b/src/Symfony/Component/Security/Http/Firewall/AbstractPreAuthenticatedListener.php
index d29f0e0bcc..d6ceef8e30 100644
--- a/src/Symfony/Component/Security/Http/Firewall/AbstractPreAuthenticatedListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/AbstractPreAuthenticatedListener.php
@@ -66,7 +66,7 @@ abstract class AbstractPreAuthenticatedListener implements ListenerInterface
         }
 
         if (null !== $this->logger) {
-            $this->logger->debug('Checking current security token.', array('token' => (string) $this->tokenStorage->getToken()));
+            $this->logger->debug('Checking current security token.', ['token' => (string) $this->tokenStorage->getToken()]);
         }
 
         if (null !== $token = $this->tokenStorage->getToken()) {
@@ -76,14 +76,14 @@ abstract class AbstractPreAuthenticatedListener implements ListenerInterface
         }
 
         if (null !== $this->logger) {
-            $this->logger->debug('Trying to pre-authenticate user.', array('username' => (string) $user));
+            $this->logger->debug('Trying to pre-authenticate user.', ['username' => (string) $user]);
         }
 
         try {
             $token = $this->authenticationManager->authenticate(new PreAuthenticatedToken($user, $credentials, $this->providerKey));
 
             if (null !== $this->logger) {
-                $this->logger->info('Pre-authentication successful.', array('token' => (string) $token));
+                $this->logger->info('Pre-authentication successful.', ['token' => (string) $token]);
             }
 
             $this->migrateSession($request, $token);
@@ -119,7 +119,7 @@ abstract class AbstractPreAuthenticatedListener implements ListenerInterface
             $this->tokenStorage->setToken(null);
 
             if (null !== $this->logger) {
-                $this->logger->info('Cleared security token due to an exception.', array('exception' => $exception));
+                $this->logger->info('Cleared security token due to an exception.', ['exception' => $exception]);
             }
         }
     }
diff --git a/src/Symfony/Component/Security/Http/Firewall/AnonymousAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/AnonymousAuthenticationListener.php
index 9615ed0b3d..b3c15a2930 100644
--- a/src/Symfony/Component/Security/Http/Firewall/AnonymousAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/AnonymousAuthenticationListener.php
@@ -49,7 +49,7 @@ class AnonymousAuthenticationListener implements ListenerInterface
         }
 
         try {
-            $token = new AnonymousToken($this->secret, 'anon.', array());
+            $token = new AnonymousToken($this->secret, 'anon.', []);
             if (null !== $this->authenticationManager) {
                 $token = $this->authenticationManager->authenticate($token);
             }
@@ -61,7 +61,7 @@ class AnonymousAuthenticationListener implements ListenerInterface
             }
         } catch (AuthenticationException $failed) {
             if (null !== $this->logger) {
-                $this->logger->info('Anonymous authentication failed.', array('exception' => $failed));
+                $this->logger->info('Anonymous authentication failed.', ['exception' => $failed]);
             }
         }
     }
diff --git a/src/Symfony/Component/Security/Http/Firewall/BasicAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/BasicAuthenticationListener.php
index 77f4c795b6..6c48162e72 100644
--- a/src/Symfony/Component/Security/Http/Firewall/BasicAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/BasicAuthenticationListener.php
@@ -69,7 +69,7 @@ class BasicAuthenticationListener implements ListenerInterface
         }
 
         if (null !== $this->logger) {
-            $this->logger->info('Basic authentication Authorization header found for user.', array('username' => $username));
+            $this->logger->info('Basic authentication Authorization header found for user.', ['username' => $username]);
         }
 
         try {
@@ -85,7 +85,7 @@ class BasicAuthenticationListener implements ListenerInterface
             }
 
             if (null !== $this->logger) {
-                $this->logger->info('Basic authentication failed for user.', array('username' => $username, 'exception' => $e));
+                $this->logger->info('Basic authentication failed for user.', ['username' => $username, 'exception' => $e]);
             }
 
             if ($this->ignoreFailure) {
diff --git a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
index 0f3a85a038..c7a6dc96c8 100644
--- a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
@@ -79,7 +79,7 @@ class ContextListener implements ListenerInterface
     public function handle(GetResponseEvent $event)
     {
         if (!$this->registered && null !== $this->dispatcher && $event->isMasterRequest()) {
-            $this->dispatcher->addListener(KernelEvents::RESPONSE, array($this, 'onKernelResponse'));
+            $this->dispatcher->addListener(KernelEvents::RESPONSE, [$this, 'onKernelResponse']);
             $this->registered = true;
         }
 
@@ -95,17 +95,17 @@ class ContextListener implements ListenerInterface
         $token = $this->safelyUnserialize($token);
 
         if (null !== $this->logger) {
-            $this->logger->debug('Read existing security token from the session.', array(
+            $this->logger->debug('Read existing security token from the session.', [
                 'key' => $this->sessionKey,
                 'token_class' => \is_object($token) ? \get_class($token) : null,
-            ));
+            ]);
         }
 
         if ($token instanceof TokenInterface) {
             $token = $this->refreshUser($token);
         } elseif (null !== $token) {
             if (null !== $this->logger) {
-                $this->logger->warning('Expected a security token from the session, got something else.', array('key' => $this->sessionKey, 'received' => $token));
+                $this->logger->warning('Expected a security token from the session, got something else.', ['key' => $this->sessionKey, 'received' => $token]);
             }
 
             $token = null;
@@ -129,7 +129,7 @@ class ContextListener implements ListenerInterface
             return;
         }
 
-        $this->dispatcher->removeListener(KernelEvents::RESPONSE, array($this, 'onKernelResponse'));
+        $this->dispatcher->removeListener(KernelEvents::RESPONSE, [$this, 'onKernelResponse']);
         $this->registered = false;
         $session = $request->getSession();
 
@@ -141,7 +141,7 @@ class ContextListener implements ListenerInterface
             $session->set($this->sessionKey, serialize($token));
 
             if (null !== $this->logger) {
-                $this->logger->debug('Stored the security token in the session.', array('key' => $this->sessionKey));
+                $this->logger->debug('Stored the security token in the session.', ['key' => $this->sessionKey]);
             }
         }
     }
@@ -178,7 +178,7 @@ class ContextListener implements ListenerInterface
                     $userDeauthenticated = true;
 
                     if (null !== $this->logger) {
-                        $this->logger->debug('Cannot refresh token because user has changed.', array('username' => $refreshedUser->getUsername(), 'provider' => \get_class($provider)));
+                        $this->logger->debug('Cannot refresh token because user has changed.', ['username' => $refreshedUser->getUsername(), 'provider' => \get_class($provider)]);
                     }
 
                     continue;
@@ -187,7 +187,7 @@ class ContextListener implements ListenerInterface
                 $token->setUser($refreshedUser);
 
                 if (null !== $this->logger) {
-                    $context = array('provider' => \get_class($provider), 'username' => $refreshedUser->getUsername());
+                    $context = ['provider' => \get_class($provider), 'username' => $refreshedUser->getUsername()];
 
                     foreach ($token->getRoles() as $role) {
                         if ($role instanceof SwitchUserRole) {
@@ -204,7 +204,7 @@ class ContextListener implements ListenerInterface
                 // let's try the next user provider
             } catch (UsernameNotFoundException $e) {
                 if (null !== $this->logger) {
-                    $this->logger->warning('Username could not be found in the selected user provider.', array('username' => $e->getUsername(), 'provider' => \get_class($provider)));
+                    $this->logger->warning('Username could not be found in the selected user provider.', ['username' => $e->getUsername(), 'provider' => \get_class($provider)]);
                 }
 
                 $userNotFoundByProvider = true;
@@ -230,7 +230,7 @@ class ContextListener implements ListenerInterface
     {
         $e = $token = null;
         $prevUnserializeHandler = ini_set('unserialize_callback_func', __CLASS__.'::handleUnserializeCallback');
-        $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = array()) use (&$prevErrorHandler) {
+        $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$prevErrorHandler) {
             if (__FILE__ === $file) {
                 throw new \ErrorException($msg, 0x37313bc, $type, $file, $line);
             }
@@ -249,7 +249,7 @@ class ContextListener implements ListenerInterface
                 throw $e;
             }
             if ($this->logger) {
-                $this->logger->warning('Failed to unserialize the security token from the session.', array('key' => $this->sessionKey, 'received' => $serializedToken, 'exception' => $e));
+                $this->logger->warning('Failed to unserialize the security token from the session.', ['key' => $this->sessionKey, 'received' => $serializedToken, 'exception' => $e]);
             }
         }
 
diff --git a/src/Symfony/Component/Security/Http/Firewall/ExceptionListener.php b/src/Symfony/Component/Security/Http/Firewall/ExceptionListener.php
index fbd483b5b1..2aa3ac621f 100644
--- a/src/Symfony/Component/Security/Http/Firewall/ExceptionListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/ExceptionListener.php
@@ -71,7 +71,7 @@ class ExceptionListener
      */
     public function register(EventDispatcherInterface $dispatcher)
     {
-        $dispatcher->addListener(KernelEvents::EXCEPTION, array($this, 'onKernelException'), 1);
+        $dispatcher->addListener(KernelEvents::EXCEPTION, [$this, 'onKernelException'], 1);
     }
 
     /**
@@ -79,7 +79,7 @@ class ExceptionListener
      */
     public function unregister(EventDispatcherInterface $dispatcher)
     {
-        $dispatcher->removeListener(KernelEvents::EXCEPTION, array($this, 'onKernelException'));
+        $dispatcher->removeListener(KernelEvents::EXCEPTION, [$this, 'onKernelException']);
     }
 
     /**
@@ -102,7 +102,7 @@ class ExceptionListener
     private function handleAuthenticationException(GetResponseForExceptionEvent $event, AuthenticationException $exception): void
     {
         if (null !== $this->logger) {
-            $this->logger->info('An AuthenticationException was thrown; redirecting to authentication entry point.', array('exception' => $exception));
+            $this->logger->info('An AuthenticationException was thrown; redirecting to authentication entry point.', ['exception' => $exception]);
         }
 
         try {
@@ -120,7 +120,7 @@ class ExceptionListener
         $token = $this->tokenStorage->getToken();
         if (!$this->authenticationTrustResolver->isFullFledged($token)) {
             if (null !== $this->logger) {
-                $this->logger->debug('Access denied, the user is not fully authenticated; redirecting to authentication entry point.', array('exception' => $exception));
+                $this->logger->debug('Access denied, the user is not fully authenticated; redirecting to authentication entry point.', ['exception' => $exception]);
             }
 
             try {
@@ -136,7 +136,7 @@ class ExceptionListener
         }
 
         if (null !== $this->logger) {
-            $this->logger->debug('Access denied, the user is neither anonymous, nor remember-me.', array('exception' => $exception));
+            $this->logger->debug('Access denied, the user is neither anonymous, nor remember-me.', ['exception' => $exception]);
         }
 
         try {
@@ -155,7 +155,7 @@ class ExceptionListener
             }
         } catch (\Exception $e) {
             if (null !== $this->logger) {
-                $this->logger->error('An exception was thrown when handling an AccessDeniedException.', array('exception' => $e));
+                $this->logger->error('An exception was thrown when handling an AccessDeniedException.', ['exception' => $e]);
             }
 
             $event->setException(new \RuntimeException('Exception thrown when handling an exception.', 0, $e));
@@ -165,14 +165,14 @@ class ExceptionListener
     private function handleLogoutException(LogoutException $exception): void
     {
         if (null !== $this->logger) {
-            $this->logger->info('A LogoutException was thrown.', array('exception' => $exception));
+            $this->logger->info('A LogoutException was thrown.', ['exception' => $exception]);
         }
     }
 
     private function startAuthentication(Request $request, AuthenticationException $authException): Response
     {
         if (null === $this->authenticationEntryPoint) {
-            throw new HttpException(Response::HTTP_UNAUTHORIZED, $authException->getMessage(), $authException, array(), $authException->getCode());
+            throw new HttpException(Response::HTTP_UNAUTHORIZED, $authException->getMessage(), $authException, [], $authException->getCode());
         }
 
         if (null !== $this->logger) {
@@ -188,7 +188,7 @@ class ExceptionListener
             $this->tokenStorage->setToken(null);
 
             if (null !== $this->logger) {
-                $this->logger->info('The security token was removed due to an AccountStatusException.', array('exception' => $authException));
+                $this->logger->info('The security token was removed due to an AccountStatusException.', ['exception' => $authException]);
             }
         }
 
diff --git a/src/Symfony/Component/Security/Http/Firewall/LogoutListener.php b/src/Symfony/Component/Security/Http/Firewall/LogoutListener.php
index 21819ce4a9..6a762e1fbd 100644
--- a/src/Symfony/Component/Security/Http/Firewall/LogoutListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/LogoutListener.php
@@ -44,18 +44,18 @@ class LogoutListener implements ListenerInterface
      * @param array                          $options          An array of options to process a logout attempt
      * @param CsrfTokenManagerInterface|null $csrfTokenManager A CsrfTokenManagerInterface instance
      */
-    public function __construct(TokenStorageInterface $tokenStorage, HttpUtils $httpUtils, LogoutSuccessHandlerInterface $successHandler, array $options = array(), CsrfTokenManagerInterface $csrfTokenManager = null)
+    public function __construct(TokenStorageInterface $tokenStorage, HttpUtils $httpUtils, LogoutSuccessHandlerInterface $successHandler, array $options = [], CsrfTokenManagerInterface $csrfTokenManager = null)
     {
         $this->tokenStorage = $tokenStorage;
         $this->httpUtils = $httpUtils;
-        $this->options = array_merge(array(
+        $this->options = array_merge([
             'csrf_parameter' => '_csrf_token',
             'csrf_token_id' => 'logout',
             'logout_path' => '/logout',
-        ), $options);
+        ], $options);
         $this->successHandler = $successHandler;
         $this->csrfTokenManager = $csrfTokenManager;
-        $this->handlers = array();
+        $this->handlers = [];
     }
 
     public function addHandler(LogoutHandlerInterface $handler)
diff --git a/src/Symfony/Component/Security/Http/Firewall/RememberMeListener.php b/src/Symfony/Component/Security/Http/Firewall/RememberMeListener.php
index b81a6712a5..4ff7424634 100644
--- a/src/Symfony/Component/Security/Http/Firewall/RememberMeListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/RememberMeListener.php
@@ -68,7 +68,7 @@ class RememberMeListener implements ListenerInterface
                 $this->logger->warning(
                     'The token storage was not populated with remember-me token as the'
                    .' RememberMeServices was not able to create a token from the remember'
-                   .' me information.', array('exception' => $e)
+                   .' me information.', ['exception' => $e]
                 );
             }
 
@@ -101,7 +101,7 @@ class RememberMeListener implements ListenerInterface
                 $this->logger->warning(
                     'The token storage was not populated with remember-me token as the'
                    .' AuthenticationManager rejected the AuthenticationToken returned'
-                   .' by the RememberMeServices.', array('exception' => $e)
+                   .' by the RememberMeServices.', ['exception' => $e]
                 );
             }
 
diff --git a/src/Symfony/Component/Security/Http/Firewall/RemoteUserAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/RemoteUserAuthenticationListener.php
index 7544d74746..d384b2f286 100644
--- a/src/Symfony/Component/Security/Http/Firewall/RemoteUserAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/RemoteUserAuthenticationListener.php
@@ -44,6 +44,6 @@ class RemoteUserAuthenticationListener extends AbstractPreAuthenticatedListener
             throw new BadCredentialsException(sprintf('User key was not found: %s', $this->userKey));
         }
 
-        return array($request->server->get($this->userKey), null);
+        return [$request->server->get($this->userKey), null];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Firewall/SimpleFormAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/SimpleFormAuthenticationListener.php
index d248b77a31..f6fd0c1ec4 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SimpleFormAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SimpleFormAuthenticationListener.php
@@ -44,7 +44,7 @@ class SimpleFormAuthenticationListener extends AbstractAuthenticationListener
     /**
      * @throws \InvalidArgumentException In case no simple authenticator is provided
      */
-    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = array(), LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null, CsrfTokenManagerInterface $csrfTokenManager = null, SimpleFormAuthenticatorInterface $simpleAuthenticator = null)
+    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = [], LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null, CsrfTokenManagerInterface $csrfTokenManager = null, SimpleFormAuthenticatorInterface $simpleAuthenticator = null)
     {
         if (!$simpleAuthenticator) {
             throw new \InvalidArgumentException('Missing simple authenticator');
@@ -53,13 +53,13 @@ class SimpleFormAuthenticationListener extends AbstractAuthenticationListener
         $this->simpleAuthenticator = $simpleAuthenticator;
         $this->csrfTokenManager = $csrfTokenManager;
 
-        $options = array_merge(array(
+        $options = array_merge([
             'username_parameter' => '_username',
             'password_parameter' => '_password',
             'csrf_parameter' => '_csrf_token',
             'csrf_token_id' => 'authenticate',
             'post_only' => true,
-        ), $options);
+        ], $options);
 
         parent::__construct($tokenStorage, $authenticationManager, $sessionStrategy, $httpUtils, $providerKey, $successHandler, $failureHandler, $options, $logger, $dispatcher);
     }
diff --git a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
index f692f608d4..c33b1fb30a 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SimplePreAuthenticationListener.php
@@ -84,7 +84,7 @@ class SimplePreAuthenticationListener implements ListenerInterface
         $request = $event->getRequest();
 
         if (null !== $this->logger) {
-            $this->logger->info('Attempting SimplePreAuthentication.', array('key' => $this->providerKey, 'authenticator' => \get_class($this->simpleAuthenticator)));
+            $this->logger->info('Attempting SimplePreAuthentication.', ['key' => $this->providerKey, 'authenticator' => \get_class($this->simpleAuthenticator)]);
         }
 
         if ((null !== $token = $this->tokenStorage->getToken()) && !$this->trustResolver->isAnonymous($token)) {
@@ -113,7 +113,7 @@ class SimplePreAuthenticationListener implements ListenerInterface
             $this->tokenStorage->setToken(null);
 
             if (null !== $this->logger) {
-                $this->logger->info('SimplePreAuthentication request failed.', array('exception' => $e, 'authenticator' => \get_class($this->simpleAuthenticator)));
+                $this->logger->info('SimplePreAuthentication request failed.', ['exception' => $e, 'authenticator' => \get_class($this->simpleAuthenticator)]);
             }
 
             if ($this->simpleAuthenticator instanceof AuthenticationFailureHandlerInterface) {
diff --git a/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php b/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
index 5500bdd878..80082b0099 100644
--- a/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/SwitchUserListener.php
@@ -128,7 +128,7 @@ class SwitchUserListener implements ListenerInterface
 
         $user = $this->provider->loadUserByUsername($username);
 
-        if (false === $this->accessDecisionManager->decide($token, array($this->role), $user)) {
+        if (false === $this->accessDecisionManager->decide($token, [$this->role], $user)) {
             $exception = new AccessDeniedException();
             $exception->setAttributes($this->role);
 
@@ -136,7 +136,7 @@ class SwitchUserListener implements ListenerInterface
         }
 
         if (null !== $this->logger) {
-            $this->logger->info('Attempting to switch to user.', array('username' => $username));
+            $this->logger->info('Attempting to switch to user.', ['username' => $username]);
         }
 
         $this->userChecker->checkPostAuth($user);
diff --git a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
index 639d5af17d..f6ce869b29 100644
--- a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php
@@ -39,15 +39,15 @@ class UsernamePasswordFormAuthenticationListener extends AbstractAuthenticationL
 {
     private $csrfTokenManager;
 
-    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = array(), LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null, CsrfTokenManagerInterface $csrfTokenManager = null)
+    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, SessionAuthenticationStrategyInterface $sessionStrategy, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler, AuthenticationFailureHandlerInterface $failureHandler, array $options = [], LoggerInterface $logger = null, EventDispatcherInterface $dispatcher = null, CsrfTokenManagerInterface $csrfTokenManager = null)
     {
-        parent::__construct($tokenStorage, $authenticationManager, $sessionStrategy, $httpUtils, $providerKey, $successHandler, $failureHandler, array_merge(array(
+        parent::__construct($tokenStorage, $authenticationManager, $sessionStrategy, $httpUtils, $providerKey, $successHandler, $failureHandler, array_merge([
             'username_parameter' => '_username',
             'password_parameter' => '_password',
             'csrf_parameter' => '_csrf_token',
             'csrf_token_id' => 'authenticate',
             'post_only' => true,
-        ), $options), $logger, $dispatcher);
+        ], $options), $logger, $dispatcher);
 
         $this->csrfTokenManager = $csrfTokenManager;
     }
diff --git a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordJsonAuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordJsonAuthenticationListener.php
index f0f1e42d7a..f7b69f0da5 100644
--- a/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordJsonAuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/UsernamePasswordJsonAuthenticationListener.php
@@ -55,7 +55,7 @@ class UsernamePasswordJsonAuthenticationListener implements ListenerInterface
     private $propertyAccessor;
     private $sessionStrategy;
 
-    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler = null, AuthenticationFailureHandlerInterface $failureHandler = null, array $options = array(), LoggerInterface $logger = null, EventDispatcherInterface $eventDispatcher = null, PropertyAccessorInterface $propertyAccessor = null)
+    public function __construct(TokenStorageInterface $tokenStorage, AuthenticationManagerInterface $authenticationManager, HttpUtils $httpUtils, string $providerKey, AuthenticationSuccessHandlerInterface $successHandler = null, AuthenticationFailureHandlerInterface $failureHandler = null, array $options = [], LoggerInterface $logger = null, EventDispatcherInterface $eventDispatcher = null, PropertyAccessorInterface $propertyAccessor = null)
     {
         $this->tokenStorage = $tokenStorage;
         $this->authenticationManager = $authenticationManager;
@@ -65,7 +65,7 @@ class UsernamePasswordJsonAuthenticationListener implements ListenerInterface
         $this->failureHandler = $failureHandler;
         $this->logger = $logger;
         $this->eventDispatcher = $eventDispatcher;
-        $this->options = array_merge(array('username_path' => 'username', 'password_path' => 'password'), $options);
+        $this->options = array_merge(['username_path' => 'username', 'password_path' => 'password'], $options);
         $this->propertyAccessor = $propertyAccessor ?: PropertyAccess::createPropertyAccessor();
     }
 
@@ -138,7 +138,7 @@ class UsernamePasswordJsonAuthenticationListener implements ListenerInterface
     private function onSuccess(Request $request, TokenInterface $token)
     {
         if (null !== $this->logger) {
-            $this->logger->info('User has been authenticated successfully.', array('username' => $token->getUsername()));
+            $this->logger->info('User has been authenticated successfully.', ['username' => $token->getUsername()]);
         }
 
         $this->migrateSession($request, $token);
@@ -166,7 +166,7 @@ class UsernamePasswordJsonAuthenticationListener implements ListenerInterface
     private function onFailure(Request $request, AuthenticationException $failed)
     {
         if (null !== $this->logger) {
-            $this->logger->info('Authentication request failed.', array('exception' => $failed));
+            $this->logger->info('Authentication request failed.', ['exception' => $failed]);
         }
 
         $token = $this->tokenStorage->getToken();
@@ -175,7 +175,7 @@ class UsernamePasswordJsonAuthenticationListener implements ListenerInterface
         }
 
         if (!$this->failureHandler) {
-            return new JsonResponse(array('error' => $failed->getMessageKey()), 401);
+            return new JsonResponse(['error' => $failed->getMessageKey()], 401);
         }
 
         $response = $this->failureHandler->onAuthenticationFailure($request, $failed);
diff --git a/src/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php b/src/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php
index bb395e16d5..2d3c26f28c 100644
--- a/src/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/X509AuthenticationListener.php
@@ -52,6 +52,6 @@ class X509AuthenticationListener extends AbstractPreAuthenticatedListener
             throw new BadCredentialsException(sprintf('SSL credentials not found: %s, %s', $this->userKey, $this->credentialKey));
         }
 
-        return array($user, $request->server->get($this->credentialKey, ''));
+        return [$user, $request->server->get($this->credentialKey, '')];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/FirewallMap.php b/src/Symfony/Component/Security/Http/FirewallMap.php
index 0f0c1fbeff..0ffd068dfb 100644
--- a/src/Symfony/Component/Security/Http/FirewallMap.php
+++ b/src/Symfony/Component/Security/Http/FirewallMap.php
@@ -24,11 +24,11 @@ use Symfony\Component\Security\Http\Firewall\LogoutListener;
  */
 class FirewallMap implements FirewallMapInterface
 {
-    private $map = array();
+    private $map = [];
 
-    public function add(RequestMatcherInterface $requestMatcher = null, array $listeners = array(), ExceptionListener $exceptionListener = null, LogoutListener $logoutListener = null)
+    public function add(RequestMatcherInterface $requestMatcher = null, array $listeners = [], ExceptionListener $exceptionListener = null, LogoutListener $logoutListener = null)
     {
-        $this->map[] = array($requestMatcher, $listeners, $exceptionListener, $logoutListener);
+        $this->map[] = [$requestMatcher, $listeners, $exceptionListener, $logoutListener];
     }
 
     /**
@@ -38,10 +38,10 @@ class FirewallMap implements FirewallMapInterface
     {
         foreach ($this->map as $elements) {
             if (null === $elements[0] || $elements[0]->matches($request)) {
-                return array($elements[1], $elements[2], $elements[3]);
+                return [$elements[1], $elements[2], $elements[3]];
             }
         }
 
-        return array(array(), null, null);
+        return [[], null, null];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/FirewallMapInterface.php b/src/Symfony/Component/Security/Http/FirewallMapInterface.php
index be7a78ccdb..6704940153 100644
--- a/src/Symfony/Component/Security/Http/FirewallMapInterface.php
+++ b/src/Symfony/Component/Security/Http/FirewallMapInterface.php
@@ -33,7 +33,7 @@ interface FirewallMapInterface
      * If there is no logout listener, the third element of the outer array
      * must be null.
      *
-     * @return array of the format array(array(AuthenticationListener), ExceptionListener, LogoutListener)
+     * @return array of the format [[AuthenticationListener], ExceptionListener, LogoutListener]
      */
     public function getListeners(Request $request);
 }
diff --git a/src/Symfony/Component/Security/Http/HttpUtils.php b/src/Symfony/Component/Security/Http/HttpUtils.php
index 850e371c95..b70ba80b78 100644
--- a/src/Symfony/Component/Security/Http/HttpUtils.php
+++ b/src/Symfony/Component/Security/Http/HttpUtils.php
@@ -82,7 +82,7 @@ class HttpUtils
      */
     public function createRequest(Request $request, $path)
     {
-        $newRequest = Request::create($this->generateUri($request, $path), 'get', array(), $request->cookies->all(), array(), $request->server->all());
+        $newRequest = Request::create($this->generateUri($request, $path), 'get', [], $request->cookies->all(), [], $request->server->all());
 
         static $setSession;
 
diff --git a/src/Symfony/Component/Security/Http/Logout/LogoutUrlGenerator.php b/src/Symfony/Component/Security/Http/Logout/LogoutUrlGenerator.php
index e81191823c..696182d1cd 100644
--- a/src/Symfony/Component/Security/Http/Logout/LogoutUrlGenerator.php
+++ b/src/Symfony/Component/Security/Http/Logout/LogoutUrlGenerator.php
@@ -28,7 +28,7 @@ class LogoutUrlGenerator
     private $requestStack;
     private $router;
     private $tokenStorage;
-    private $listeners = array();
+    private $listeners = [];
     private $currentFirewall;
 
     public function __construct(RequestStack $requestStack = null, UrlGeneratorInterface $router = null, TokenStorageInterface $tokenStorage = null)
@@ -50,7 +50,7 @@ class LogoutUrlGenerator
      */
     public function registerListener($key, $logoutPath, $csrfTokenId, $csrfParameter, CsrfTokenManagerInterface $csrfTokenManager = null, string $context = null)
     {
-        $this->listeners[$key] = array($logoutPath, $csrfTokenId, $csrfParameter, $csrfTokenManager, $context);
+        $this->listeners[$key] = [$logoutPath, $csrfTokenId, $csrfParameter, $csrfTokenManager, $context];
     }
 
     /**
@@ -83,7 +83,7 @@ class LogoutUrlGenerator
      */
     public function setCurrentFirewall($key, $context = null)
     {
-        $this->currentFirewall = array($key, $context);
+        $this->currentFirewall = [$key, $context];
     }
 
     /**
@@ -102,7 +102,7 @@ class LogoutUrlGenerator
             throw new \LogicException('Unable to generate the logout URL without a path.');
         }
 
-        $parameters = null !== $csrfTokenManager ? array($csrfParameter => (string) $csrfTokenManager->getToken($csrfTokenId)) : array();
+        $parameters = null !== $csrfTokenManager ? [$csrfParameter => (string) $csrfTokenManager->getToken($csrfTokenId)] : [];
 
         if ('/' === $logoutPath[0]) {
             if (!$this->requestStack) {
diff --git a/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
index 56dba7938e..cf98bc7766 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/AbstractRememberMeServices.php
@@ -35,10 +35,10 @@ abstract class AbstractRememberMeServices implements RememberMeServicesInterface
     const COOKIE_DELIMITER = ':';
 
     protected $logger;
-    protected $options = array(
+    protected $options = [
         'secure' => false,
         'httponly' => true,
-    );
+    ];
     private $providerKey;
     private $secret;
     private $userProviders;
@@ -46,7 +46,7 @@ abstract class AbstractRememberMeServices implements RememberMeServicesInterface
     /**
      * @throws \InvalidArgumentException
      */
-    public function __construct(array $userProviders, string $secret, string $providerKey, array $options = array(), LoggerInterface $logger = null)
+    public function __construct(array $userProviders, string $secret, string $providerKey, array $options = [], LoggerInterface $logger = null)
     {
         if (empty($secret)) {
             throw new \InvalidArgumentException('$secret must not be empty.');
@@ -121,19 +121,19 @@ abstract class AbstractRememberMeServices implements RememberMeServicesInterface
             throw $e;
         } catch (UsernameNotFoundException $e) {
             if (null !== $this->logger) {
-                $this->logger->info('User for remember-me cookie not found.', array('exception' => $e));
+                $this->logger->info('User for remember-me cookie not found.', ['exception' => $e]);
             }
 
             $this->loginFail($request, $e);
         } catch (UnsupportedUserException $e) {
             if (null !== $this->logger) {
-                $this->logger->warning('User class for remember-me cookie not supported.', array('exception' => $e));
+                $this->logger->warning('User class for remember-me cookie not supported.', ['exception' => $e]);
             }
 
             $this->loginFail($request, $e);
         } catch (AuthenticationException $e) {
             if (null !== $this->logger) {
-                $this->logger->debug('Remember-Me authentication failed.', array('exception' => $e));
+                $this->logger->debug('Remember-Me authentication failed.', ['exception' => $e]);
             }
 
             $this->loginFail($request, $e);
@@ -268,7 +268,7 @@ abstract class AbstractRememberMeServices implements RememberMeServicesInterface
     protected function cancelCookie(Request $request)
     {
         if (null !== $this->logger) {
-            $this->logger->debug('Clearing remember-me cookie.', array('name' => $this->options['name']));
+            $this->logger->debug('Clearing remember-me cookie.', ['name' => $this->options['name']]);
         }
 
         $request->attributes->set(self::COOKIE_ATTR_NAME, new Cookie($this->options['name'], null, 1, $this->options['path'], $this->options['domain'], $this->options['secure'] ?? $request->isSecure(), $this->options['httponly'], false, $this->options['samesite'] ?? null));
@@ -288,7 +288,7 @@ abstract class AbstractRememberMeServices implements RememberMeServicesInterface
         $parameter = ParameterBagUtils::getRequestParameterValue($request, $this->options['remember_me_parameter']);
 
         if (null === $parameter && null !== $this->logger) {
-            $this->logger->debug('Did not send remember-me cookie.', array('parameter' => $this->options['remember_me_parameter']));
+            $this->logger->debug('Did not send remember-me cookie.', ['parameter' => $this->options['remember_me_parameter']]);
         }
 
         return 'true' === $parameter || 'on' === $parameter || '1' === $parameter || 'yes' === $parameter || true === $parameter;
diff --git a/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
index ea76950674..61b1257b4a 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices.php
@@ -79,7 +79,7 @@ class PersistentTokenBasedRememberMeServices extends AbstractRememberMeServices
         $request->attributes->set(self::COOKIE_ATTR_NAME,
             new Cookie(
                 $this->options['name'],
-                $this->encodeCookie(array($series, $tokenValue)),
+                $this->encodeCookie([$series, $tokenValue]),
                 time() + $this->options['lifetime'],
                 $this->options['path'],
                 $this->options['domain'],
@@ -114,7 +114,7 @@ class PersistentTokenBasedRememberMeServices extends AbstractRememberMeServices
         $response->headers->setCookie(
             new Cookie(
                 $this->options['name'],
-                $this->encodeCookie(array($series, $tokenValue)),
+                $this->encodeCookie([$series, $tokenValue]),
                 time() + $this->options['lifetime'],
                 $this->options['path'],
                 $this->options['domain'],
diff --git a/src/Symfony/Component/Security/Http/RememberMe/ResponseListener.php b/src/Symfony/Component/Security/Http/RememberMe/ResponseListener.php
index 5467e02365..7d931166dd 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/ResponseListener.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/ResponseListener.php
@@ -41,6 +41,6 @@ class ResponseListener implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(KernelEvents::RESPONSE => 'onKernelResponse');
+        return [KernelEvents::RESPONSE => 'onKernelResponse'];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php b/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
index 1f272148fb..c208c588f1 100644
--- a/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
+++ b/src/Symfony/Component/Security/Http/RememberMe/TokenBasedRememberMeServices.php
@@ -102,12 +102,12 @@ class TokenBasedRememberMeServices extends AbstractRememberMeServices
     {
         // $username is encoded because it might contain COOKIE_DELIMITER,
         // we assume other values don't
-        return $this->encodeCookie(array(
+        return $this->encodeCookie([
             $class,
             base64_encode($username),
             $expires,
             $this->generateCookieHash($class, $username, $expires, $password),
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php b/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
index 822043d63c..8ae9581e2c 100644
--- a/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/AccessMapTest.php
@@ -23,10 +23,10 @@ class AccessMapTest extends TestCase
         $requestMatcher2 = $this->getRequestMatcher($request, true);
 
         $map = new AccessMap();
-        $map->add($requestMatcher1, array('ROLE_ADMIN'), 'http');
-        $map->add($requestMatcher2, array('ROLE_USER'), 'https');
+        $map->add($requestMatcher1, ['ROLE_ADMIN'], 'http');
+        $map->add($requestMatcher2, ['ROLE_USER'], 'https');
 
-        $this->assertSame(array(array('ROLE_USER'), 'https'), $map->getPatterns($request));
+        $this->assertSame([['ROLE_USER'], 'https'], $map->getPatterns($request));
     }
 
     public function testReturnsEmptyPatternIfNoneMatched()
@@ -35,9 +35,9 @@ class AccessMapTest extends TestCase
         $requestMatcher = $this->getRequestMatcher($request, false);
 
         $map = new AccessMap();
-        $map->add($requestMatcher, array('ROLE_USER'), 'https');
+        $map->add($requestMatcher, ['ROLE_USER'], 'https');
 
-        $this->assertSame(array(null, null), $map->getPatterns($request));
+        $this->assertSame([null, null], $map->getPatterns($request));
     }
 
     private function getRequestMatcher($request, $matches)
diff --git a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
index cc2f504b88..a9c18f3475 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationFailureHandlerTest.php
@@ -35,12 +35,12 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
         $this->session = $this->getMockBuilder('Symfony\Component\HttpFoundation\Session\SessionInterface')->getMock();
         $this->request = $this->getMockBuilder('Symfony\Component\HttpFoundation\Request')->getMock();
         $this->request->expects($this->any())->method('getSession')->will($this->returnValue($this->session));
-        $this->exception = $this->getMockBuilder('Symfony\Component\Security\Core\Exception\AuthenticationException')->setMethods(array('getMessage'))->getMock();
+        $this->exception = $this->getMockBuilder('Symfony\Component\Security\Core\Exception\AuthenticationException')->setMethods(['getMessage'])->getMock();
     }
 
     public function testForward()
     {
-        $options = array('failure_forward' => true);
+        $options = ['failure_forward' => true];
 
         $subRequest = $this->getRequest();
         $subRequest->attributes->expects($this->once())
@@ -67,7 +67,7 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
             ->method('createRedirectResponse')->with($this->request, '/login')
             ->will($this->returnValue($response));
 
-        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, array(), $this->logger);
+        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, [], $this->logger);
         $result = $handler->onAuthenticationFailure($this->request, $this->exception);
 
         $this->assertSame($response, $result);
@@ -78,13 +78,13 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
         $this->session->expects($this->once())
             ->method('set')->with(Security::AUTHENTICATION_ERROR, $this->exception);
 
-        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, array(), $this->logger);
+        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, [], $this->logger);
         $handler->onAuthenticationFailure($this->request, $this->exception);
     }
 
     public function testExceptionIsPassedInRequestOnForward()
     {
-        $options = array('failure_forward' => true);
+        $options = ['failure_forward' => true];
 
         $subRequest = $this->getRequest();
         $subRequest->attributes->expects($this->once())
@@ -105,15 +105,15 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Authentication failure, redirect triggered.', array('failure_path' => '/login'));
+            ->with('Authentication failure, redirect triggered.', ['failure_path' => '/login']);
 
-        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, array(), $this->logger);
+        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, [], $this->logger);
         $handler->onAuthenticationFailure($this->request, $this->exception);
     }
 
     public function testForwardIsLogged()
     {
-        $options = array('failure_forward' => true);
+        $options = ['failure_forward' => true];
 
         $this->httpUtils->expects($this->once())
             ->method('createRequest')->with($this->request, '/login')
@@ -122,7 +122,7 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
         $this->logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Authentication failure, forward triggered.', array('failure_path' => '/login'));
+            ->with('Authentication failure, forward triggered.', ['failure_path' => '/login']);
 
         $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, $options, $this->logger);
         $handler->onAuthenticationFailure($this->request, $this->exception);
@@ -130,7 +130,7 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
 
     public function testFailurePathCanBeOverwritten()
     {
-        $options = array('failure_path' => '/auth/login');
+        $options = ['failure_path' => '/auth/login'];
 
         $this->httpUtils->expects($this->once())
             ->method('createRedirectResponse')->with($this->request, '/auth/login');
@@ -148,7 +148,7 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
         $this->httpUtils->expects($this->once())
             ->method('createRedirectResponse')->with($this->request, '/auth/login');
 
-        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, array(), $this->logger);
+        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, [], $this->logger);
         $handler->onAuthenticationFailure($this->request, $this->exception);
     }
 
@@ -156,18 +156,18 @@ class DefaultAuthenticationFailureHandlerTest extends TestCase
     {
         $this->request->expects($this->once())
             ->method('get')->with('_failure_path')
-            ->will($this->returnValue(array('value' => '/auth/login')));
+            ->will($this->returnValue(['value' => '/auth/login']));
 
         $this->httpUtils->expects($this->once())
             ->method('createRedirectResponse')->with($this->request, '/auth/login');
 
-        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, array('failure_path_parameter' => '_failure_path[value]'), $this->logger);
+        $handler = new DefaultAuthenticationFailureHandler($this->httpKernel, $this->httpUtils, ['failure_path_parameter' => '_failure_path[value]'], $this->logger);
         $handler->onAuthenticationFailure($this->request, $this->exception);
     }
 
     public function testFailurePathParameterCanBeOverwritten()
     {
-        $options = array('failure_path_parameter' => '_my_failure_path');
+        $options = ['failure_path_parameter' => '_my_failure_path'];
 
         $this->request->expects($this->once())
             ->method('get')->with('_my_failure_path')
diff --git a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
index a7b8547b6b..531d49227f 100644
--- a/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Authentication/DefaultAuthenticationSuccessHandlerTest.php
@@ -42,72 +42,72 @@ class DefaultAuthenticationSuccessHandlerTest extends TestCase
         $requestWithSession = Request::create('/');
         $requestWithSession->setSession($session);
 
-        return array(
-            'default' => array(
+        return [
+            'default' => [
                 Request::create('/'),
-                array(),
+                [],
                 '/',
-            ),
-            'forced target path' => array(
+            ],
+            'forced target path' => [
                 Request::create('/'),
-                array('always_use_default_target_path' => true, 'default_target_path' => '/dashboard'),
+                ['always_use_default_target_path' => true, 'default_target_path' => '/dashboard'],
                 '/dashboard',
-            ),
-            'target path as query string' => array(
+            ],
+            'target path as query string' => [
                 Request::create('/?_target_path=/dashboard'),
-                array(),
+                [],
                 '/dashboard',
-            ),
-            'target path name as query string is customized' => array(
+            ],
+            'target path name as query string is customized' => [
                 Request::create('/?_my_target_path=/dashboard'),
-                array('target_path_parameter' => '_my_target_path'),
+                ['target_path_parameter' => '_my_target_path'],
                 '/dashboard',
-            ),
-            'target path name as query string is customized and nested' => array(
+            ],
+            'target path name as query string is customized and nested' => [
                 Request::create('/?_target_path[value]=/dashboard'),
-                array('target_path_parameter' => '_target_path[value]'),
+                ['target_path_parameter' => '_target_path[value]'],
                 '/dashboard',
-            ),
-            'target path in session' => array(
+            ],
+            'target path in session' => [
                 $requestWithSession,
-                array(),
+                [],
                 '/admin/dashboard',
-            ),
-            'target path as referer' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => 'http://localhost/dashboard')),
-                array('use_referer' => true),
+            ],
+            'target path as referer' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => 'http://localhost/dashboard']),
+                ['use_referer' => true],
                 '/dashboard',
-            ),
-            'target path as referer is ignored if not configured' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => 'http://localhost/dashboard')),
-                array(),
+            ],
+            'target path as referer is ignored if not configured' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => 'http://localhost/dashboard']),
+                [],
                 '/',
-            ),
-            'target path as referer when referer not set' => array(
+            ],
+            'target path as referer when referer not set' => [
                 Request::create('/'),
-                array('use_referer' => true),
+                ['use_referer' => true],
                 '/',
-            ),
-            'target path as referer when referer is ?' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => '?')),
-                array('use_referer' => true),
+            ],
+            'target path as referer when referer is ?' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => '?']),
+                ['use_referer' => true],
                 '/',
-            ),
-            'target path should be different than login URL' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => 'http://localhost/login')),
-                array('use_referer' => true, 'login_path' => '/login'),
+            ],
+            'target path should be different than login URL' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => 'http://localhost/login']),
+                ['use_referer' => true, 'login_path' => '/login'],
                 '/',
-            ),
-            'target path should be different than login URL (query string does not matter)' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => 'http://localhost/login?t=1&p=2')),
-                array('use_referer' => true, 'login_path' => '/login'),
+            ],
+            'target path should be different than login URL (query string does not matter)' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => 'http://localhost/login?t=1&p=2']),
+                ['use_referer' => true, 'login_path' => '/login'],
                 '/',
-            ),
-            'target path should be different than login URL (login_path as a route)' => array(
-                Request::create('/', 'GET', array(), array(), array(), array('HTTP_REFERER' => 'http://localhost/login?t=1&p=2')),
-                array('use_referer' => true, 'login_path' => 'login_route'),
+            ],
+            'target path should be different than login URL (login_path as a route)' => [
+                Request::create('/', 'GET', [], [], [], ['HTTP_REFERER' => 'http://localhost/login?t=1&p=2']),
+                ['use_referer' => true, 'login_path' => 'login_route'],
                 '/',
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/Controller/UserValueResolverTest.php b/src/Symfony/Component/Security/Http/Tests/Controller/UserValueResolverTest.php
index 264272b125..25108e482d 100644
--- a/src/Symfony/Component/Security/Http/Tests/Controller/UserValueResolverTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Controller/UserValueResolverTest.php
@@ -66,7 +66,7 @@ class UserValueResolverTest extends TestCase
         $metadata = new ArgumentMetadata('foo', UserInterface::class, false, false, null);
 
         $this->assertTrue($resolver->supports(Request::create('/'), $metadata));
-        $this->assertSame(array($user), iterator_to_array($resolver->resolve(Request::create('/'), $metadata)));
+        $this->assertSame([$user], iterator_to_array($resolver->resolve(Request::create('/'), $metadata)));
     }
 
     public function testIntegration()
@@ -77,8 +77,8 @@ class UserValueResolverTest extends TestCase
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken($token);
 
-        $argumentResolver = new ArgumentResolver(null, array(new UserValueResolver($tokenStorage)));
-        $this->assertSame(array($user), $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user) {}));
+        $argumentResolver = new ArgumentResolver(null, [new UserValueResolver($tokenStorage)]);
+        $this->assertSame([$user], $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user) {}));
     }
 
     public function testIntegrationNoUser()
@@ -87,8 +87,8 @@ class UserValueResolverTest extends TestCase
         $tokenStorage = new TokenStorage();
         $tokenStorage->setToken($token);
 
-        $argumentResolver = new ArgumentResolver(null, array(new UserValueResolver($tokenStorage), new DefaultValueResolver()));
-        $this->assertSame(array(null), $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user = null) {}));
+        $argumentResolver = new ArgumentResolver(null, [new UserValueResolver($tokenStorage), new DefaultValueResolver()]);
+        $this->assertSame([null], $argumentResolver->getArguments(Request::create('/'), function (UserInterface $user = null) {}));
     }
 }
 
diff --git a/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php b/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
index abd90fb4ae..05c85f23b7 100644
--- a/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/EntryPoint/RetryAuthenticationEntryPointTest.php
@@ -32,34 +32,34 @@ class RetryAuthenticationEntryPointTest extends TestCase
     public function dataForStart()
     {
         if (!class_exists('Symfony\Component\HttpFoundation\Request')) {
-            return array(array());
+            return [[]];
         }
 
-        return array(
-            array(
+        return [
+            [
                 80,
                 443,
                 Request::create('http://localhost/foo/bar?baz=bat'),
                 'https://localhost/foo/bar?baz=bat',
-            ),
-            array(
+            ],
+            [
                 80,
                 443,
                 Request::create('https://localhost/foo/bar?baz=bat'),
                 'http://localhost/foo/bar?baz=bat',
-            ),
-            array(
+            ],
+            [
                 80,
                 123,
                 Request::create('http://localhost/foo/bar?baz=bat'),
                 'https://localhost:123/foo/bar?baz=bat',
-            ),
-            array(
+            ],
+            [
                 8080,
                 443,
                 Request::create('https://localhost/foo/bar?baz=bat'),
                 'http://localhost:8080/foo/bar?baz=bat',
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
index 32ea6e1025..44bbf4423b 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AbstractPreAuthenticatedListenerTest.php
@@ -21,9 +21,9 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
 {
     public function testHandleWithValidValues()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
@@ -47,11 +47,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
             ->will($this->returnValue($token))
         ;
 
-        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', array(
+        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', [
             $tokenStorage,
             $authenticationManager,
             'TheProviderKey',
-        ));
+        ]);
         $listener
             ->expects($this->once())
             ->method('getPreAuthenticatedData')
@@ -69,9 +69,9 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
 
     public function testHandleWhenAuthenticationFails()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -93,11 +93,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
             ->willThrowException($exception)
         ;
 
-        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', array(
+        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', [
             $tokenStorage,
             $authenticationManager,
             'TheProviderKey',
-        ));
+        ]);
         $listener
             ->expects($this->once())
             ->method('getPreAuthenticatedData')
@@ -115,11 +115,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
 
     public function testHandleWhenAuthenticationFailsWithDifferentToken()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $token = new UsernamePasswordToken('TheUsername', 'ThePassword', 'TheProviderKey', array('ROLE_FOO'));
+        $token = new UsernamePasswordToken('TheUsername', 'ThePassword', 'TheProviderKey', ['ROLE_FOO']);
 
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -141,11 +141,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
             ->willThrowException($exception)
         ;
 
-        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', array(
+        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', [
             $tokenStorage,
             $authenticationManager,
             'TheProviderKey',
-        ));
+        ]);
         $listener
             ->expects($this->once())
             ->method('getPreAuthenticatedData')
@@ -163,11 +163,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
 
     public function testHandleWithASimilarAuthenticatedToken()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
-        $token = new PreAuthenticatedToken('TheUser', 'TheCredentials', 'TheProviderKey', array('ROLE_FOO'));
+        $token = new PreAuthenticatedToken('TheUser', 'TheCredentials', 'TheProviderKey', ['ROLE_FOO']);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -182,11 +182,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
             ->method('authenticate')
         ;
 
-        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', array(
+        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', [
             $tokenStorage,
             $authenticationManager,
             'TheProviderKey',
-        ));
+        ]);
         $listener
             ->expects($this->once())
             ->method('getPreAuthenticatedData')
@@ -204,11 +204,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
 
     public function testHandleWithAnInvalidSimilarToken()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
-        $token = new PreAuthenticatedToken('AnotherUser', 'TheCredentials', 'TheProviderKey', array('ROLE_FOO'));
+        $token = new PreAuthenticatedToken('AnotherUser', 'TheCredentials', 'TheProviderKey', ['ROLE_FOO']);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -231,11 +231,11 @@ class AbstractPreAuthenticatedListenerTest extends TestCase
             ->willThrowException($exception)
         ;
 
-        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', array(
+        $listener = $this->getMockForAbstractClass('Symfony\Component\Security\Http\Firewall\AbstractPreAuthenticatedListener', [
             $tokenStorage,
             $authenticationManager,
             'TheProviderKey',
-        ));
+        ]);
         $listener
             ->expects($this->once())
             ->method('getPreAuthenticatedData')
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
index c49527bc14..92b2270877 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AccessListenerTest.php
@@ -28,7 +28,7 @@ class AccessListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array('foo' => 'bar'), null)))
+            ->will($this->returnValue([['foo' => 'bar'], null]))
         ;
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -49,7 +49,7 @@ class AccessListenerTest extends TestCase
         $accessDecisionManager
             ->expects($this->once())
             ->method('decide')
-            ->with($this->equalTo($token), $this->equalTo(array('foo' => 'bar')), $this->equalTo($request))
+            ->with($this->equalTo($token), $this->equalTo(['foo' => 'bar']), $this->equalTo($request))
             ->will($this->returnValue(false))
         ;
 
@@ -79,7 +79,7 @@ class AccessListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array('foo' => 'bar'), null)))
+            ->will($this->returnValue([['foo' => 'bar'], null]))
         ;
 
         $notAuthenticatedToken = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -120,7 +120,7 @@ class AccessListenerTest extends TestCase
         $accessDecisionManager
             ->expects($this->once())
             ->method('decide')
-            ->with($this->equalTo($authenticatedToken), $this->equalTo(array('foo' => 'bar')), $this->equalTo($request))
+            ->with($this->equalTo($authenticatedToken), $this->equalTo(['foo' => 'bar']), $this->equalTo($request))
             ->will($this->returnValue(true))
         ;
 
@@ -150,7 +150,7 @@ class AccessListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(null, null)))
+            ->will($this->returnValue([null, null]))
         ;
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
index 5bd0c80829..f6f36415d3 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/AnonymousAuthenticationListenerTest.php
@@ -49,7 +49,7 @@ class AnonymousAuthenticationListenerTest extends TestCase
             ->will($this->returnValue(null))
         ;
 
-        $anonymousToken = new AnonymousToken('TheSecret', 'anon.', array());
+        $anonymousToken = new AnonymousToken('TheSecret', 'anon.', []);
 
         $authenticationManager = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface')->getMock();
         $authenticationManager
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
index 269dbaeeaa..2eec46b1d1 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/BasicAuthenticationListenerTest.php
@@ -23,10 +23,10 @@ class BasicAuthenticationListenerTest extends TestCase
 {
     public function testHandleWithValidUsernameAndPasswordServerParameters()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array(
+        $request = new Request([], [], [], [], [], [
             'PHP_AUTH_USER' => 'TheUsername',
             'PHP_AUTH_PW' => 'ThePassword',
-        ));
+        ]);
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
@@ -69,10 +69,10 @@ class BasicAuthenticationListenerTest extends TestCase
 
     public function testHandleWhenAuthenticationFails()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array(
+        $request = new Request([], [], [], [], [], [
             'PHP_AUTH_USER' => 'TheUsername',
             'PHP_AUTH_PW' => 'ThePassword',
-        ));
+        ]);
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
@@ -99,7 +99,7 @@ class BasicAuthenticationListenerTest extends TestCase
 
         $listener = new BasicAuthenticationListener(
             $tokenStorage,
-            new AuthenticationProviderManager(array($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface')->getMock())),
+            new AuthenticationProviderManager([$this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface')->getMock()]),
             'TheProviderKey',
             $authenticationEntryPoint
         );
@@ -148,9 +148,9 @@ class BasicAuthenticationListenerTest extends TestCase
 
     public function testHandleWithASimilarAuthenticatedToken()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array('PHP_AUTH_USER' => 'TheUsername'));
+        $request = new Request([], [], [], [], [], ['PHP_AUTH_USER' => 'TheUsername']);
 
-        $token = new UsernamePasswordToken('TheUsername', 'ThePassword', 'TheProviderKey', array('ROLE_FOO'));
+        $token = new UsernamePasswordToken('TheUsername', 'ThePassword', 'TheProviderKey', ['ROLE_FOO']);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -198,12 +198,12 @@ class BasicAuthenticationListenerTest extends TestCase
 
     public function testHandleWithADifferentAuthenticatedToken()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array(
+        $request = new Request([], [], [], [], [], [
             'PHP_AUTH_USER' => 'TheUsername',
             'PHP_AUTH_PW' => 'ThePassword',
-        ));
+        ]);
 
-        $token = new PreAuthenticatedToken('TheUser', 'TheCredentials', 'TheProviderKey', array('ROLE_FOO'));
+        $token = new PreAuthenticatedToken('TheUser', 'TheCredentials', 'TheProviderKey', ['ROLE_FOO']);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage
@@ -228,7 +228,7 @@ class BasicAuthenticationListenerTest extends TestCase
 
         $listener = new BasicAuthenticationListener(
             $tokenStorage,
-            new AuthenticationProviderManager(array($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface')->getMock())),
+            new AuthenticationProviderManager([$this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface')->getMock()]),
             'TheProviderKey',
             $authenticationEntryPoint
         );
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
index 3016269c04..3740faec8b 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ChannelListenerTest.php
@@ -31,7 +31,7 @@ class ChannelListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array(), 'http')))
+            ->will($this->returnValue([[], 'http']))
         ;
 
         $entryPoint = $this->getMockBuilder('Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface')->getMock();
@@ -69,7 +69,7 @@ class ChannelListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array(), 'https')))
+            ->will($this->returnValue([[], 'https']))
         ;
 
         $entryPoint = $this->getMockBuilder('Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface')->getMock();
@@ -109,7 +109,7 @@ class ChannelListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array(), 'https')))
+            ->will($this->returnValue([[], 'https']))
         ;
 
         $entryPoint = $this->getMockBuilder('Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface')->getMock();
@@ -152,7 +152,7 @@ class ChannelListenerTest extends TestCase
             ->expects($this->any())
             ->method('getPatterns')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array(), 'http')))
+            ->will($this->returnValue([[], 'http']))
         ;
 
         $entryPoint = $this->getMockBuilder('Symfony\Component\Security\Http\EntryPoint\AuthenticationEntryPointInterface')->getMock();
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
index 02acb2490e..e3c55d33ed 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ContextListenerTest.php
@@ -42,7 +42,7 @@ class ContextListenerTest extends TestCase
     {
         new ContextListener(
             $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock(),
-            array(),
+            [],
             ''
         );
     }
@@ -53,7 +53,7 @@ class ContextListenerTest extends TestCase
      */
     public function testUserProvidersNeedToImplementAnInterface()
     {
-        $this->handleEventWithPreviousSession(new TokenStorage(), array(new \stdClass()));
+        $this->handleEventWithPreviousSession(new TokenStorage(), [new \stdClass()]);
     }
 
     public function testOnKernelResponseWillAddSession()
@@ -112,7 +112,7 @@ class ContextListenerTest extends TestCase
             new Response()
         );
 
-        $listener = new ContextListener($tokenStorage, array(), 'session', null, new EventDispatcher());
+        $listener = new ContextListener($tokenStorage, [], 'session', null, new EventDispatcher());
         $listener->onKernelResponse($event);
 
         $this->assertTrue($session->isStarted());
@@ -131,7 +131,7 @@ class ContextListenerTest extends TestCase
             new Response()
         );
 
-        $listener = new ContextListener(new TokenStorage(), array(), 'session', null, new EventDispatcher());
+        $listener = new ContextListener(new TokenStorage(), [], 'session', null, new EventDispatcher());
         $listener->onKernelResponse($event);
 
         $this->assertFalse($session->isStarted());
@@ -166,19 +166,19 @@ class ContextListenerTest extends TestCase
             ->method('setToken')
             ->with(null);
 
-        $listener = new ContextListener($tokenStorage, array(), 'key123');
+        $listener = new ContextListener($tokenStorage, [], 'key123');
         $listener->handle($event);
     }
 
     public function provideInvalidToken()
     {
-        return array(
-            array('foo'),
-            array('O:8:"NotFound":0:{}'),
-            array(serialize(new \__PHP_Incomplete_Class())),
-            array(serialize(null)),
-            array(null),
-        );
+        return [
+            ['foo'],
+            ['O:8:"NotFound":0:{}'],
+            [serialize(new \__PHP_Incomplete_Class())],
+            [serialize(null)],
+            [null],
+        ];
     }
 
     public function testHandleAddsKernelResponseListener()
@@ -189,7 +189,7 @@ class ContextListenerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $listener = new ContextListener($tokenStorage, array(), 'key123', null, $dispatcher);
+        $listener = new ContextListener($tokenStorage, [], 'key123', null, $dispatcher);
 
         $event->expects($this->any())
             ->method('isMasterRequest')
@@ -200,7 +200,7 @@ class ContextListenerTest extends TestCase
 
         $dispatcher->expects($this->once())
             ->method('addListener')
-            ->with(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+            ->with(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
 
         $listener->handle($event);
     }
@@ -213,7 +213,7 @@ class ContextListenerTest extends TestCase
             ->disableOriginalConstructor()
             ->getMock();
 
-        $listener = new ContextListener($tokenStorage, array(), 'key123', null, $dispatcher);
+        $listener = new ContextListener($tokenStorage, [], 'key123', null, $dispatcher);
 
         $request = $this->getMockBuilder('Symfony\Component\HttpFoundation\Request')->getMock();
         $request->expects($this->any())
@@ -229,7 +229,7 @@ class ContextListenerTest extends TestCase
 
         $dispatcher->expects($this->once())
             ->method('removeListener')
-            ->with(KernelEvents::RESPONSE, array($listener, 'onKernelResponse'));
+            ->with(KernelEvents::RESPONSE, [$listener, 'onKernelResponse']);
 
         $listener->onKernelResponse($event);
     }
@@ -247,7 +247,7 @@ class ContextListenerTest extends TestCase
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
         $tokenStorage->expects($this->once())->method('setToken')->with(null);
 
-        $listener = new ContextListener($tokenStorage, array(), 'key123');
+        $listener = new ContextListener($tokenStorage, [], 'key123');
         $listener->handle($event);
     }
 
@@ -255,7 +255,7 @@ class ContextListenerTest extends TestCase
     {
         $tokenStorage = new TokenStorage();
         $refreshedUser = new User('foobar', 'baz');
-        $this->handleEventWithPreviousSession($tokenStorage, array(new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser)));
+        $this->handleEventWithPreviousSession($tokenStorage, [new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser)]);
 
         $this->assertNull($tokenStorage->getToken());
     }
@@ -265,7 +265,7 @@ class ContextListenerTest extends TestCase
         $tokenStorage = new TokenStorage();
         $badRefreshedUser = new User('foobar', 'baz');
         $goodRefreshedUser = new User('foobar', 'bar');
-        $this->handleEventWithPreviousSession($tokenStorage, array(new SupportingUserProvider($badRefreshedUser), new SupportingUserProvider($goodRefreshedUser)), $goodRefreshedUser, true);
+        $this->handleEventWithPreviousSession($tokenStorage, [new SupportingUserProvider($badRefreshedUser), new SupportingUserProvider($goodRefreshedUser)], $goodRefreshedUser, true);
         $this->assertSame($goodRefreshedUser, $tokenStorage->getToken()->getUser());
     }
 
@@ -273,7 +273,7 @@ class ContextListenerTest extends TestCase
     {
         $tokenStorage = new TokenStorage();
         $refreshedUser = new User('foobar', 'baz');
-        $this->handleEventWithPreviousSession($tokenStorage, array(new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser)), $refreshedUser);
+        $this->handleEventWithPreviousSession($tokenStorage, [new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser)], $refreshedUser);
 
         $this->assertSame($refreshedUser, $tokenStorage->getToken()->getUser());
     }
@@ -282,7 +282,7 @@ class ContextListenerTest extends TestCase
     {
         $tokenStorage = new TokenStorage();
         $refreshedUser = new User('foobar', 'baz');
-        $this->handleEventWithPreviousSession($tokenStorage, array(new SupportingUserProvider(), new SupportingUserProvider($refreshedUser)), $refreshedUser);
+        $this->handleEventWithPreviousSession($tokenStorage, [new SupportingUserProvider(), new SupportingUserProvider($refreshedUser)], $refreshedUser);
 
         $this->assertSame($refreshedUser, $tokenStorage->getToken()->getUser());
     }
@@ -290,7 +290,7 @@ class ContextListenerTest extends TestCase
     public function testTokenIsSetToNullIfNoUserWasLoadedByTheRegisteredUserProviders()
     {
         $tokenStorage = new TokenStorage();
-        $this->handleEventWithPreviousSession($tokenStorage, array(new NotSupportingUserProvider(), new SupportingUserProvider()));
+        $this->handleEventWithPreviousSession($tokenStorage, [new NotSupportingUserProvider(), new SupportingUserProvider()]);
 
         $this->assertNull($tokenStorage->getToken());
     }
@@ -300,14 +300,14 @@ class ContextListenerTest extends TestCase
      */
     public function testRuntimeExceptionIsThrownIfNoSupportingUserProviderWasRegistered()
     {
-        $this->handleEventWithPreviousSession(new TokenStorage(), array(new NotSupportingUserProvider(), new NotSupportingUserProvider()));
+        $this->handleEventWithPreviousSession(new TokenStorage(), [new NotSupportingUserProvider(), new NotSupportingUserProvider()]);
     }
 
     public function testAcceptsProvidersAsTraversable()
     {
         $tokenStorage = new TokenStorage();
         $refreshedUser = new User('foobar', 'baz');
-        $this->handleEventWithPreviousSession($tokenStorage, new \ArrayObject(array(new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser))), $refreshedUser);
+        $this->handleEventWithPreviousSession($tokenStorage, new \ArrayObject([new NotSupportingUserProvider(), new SupportingUserProvider($refreshedUser)]), $refreshedUser);
 
         $this->assertSame($refreshedUser, $tokenStorage->getToken()->getUser());
     }
@@ -334,7 +334,7 @@ class ContextListenerTest extends TestCase
             new Response()
         );
 
-        $listener = new ContextListener($tokenStorage, array(), 'session', null, new EventDispatcher());
+        $listener = new ContextListener($tokenStorage, [], 'session', null, new EventDispatcher());
         $listener->onKernelResponse($event);
 
         return $session;
@@ -344,7 +344,7 @@ class ContextListenerTest extends TestCase
     {
         $user = $user ?: new User('foo', 'bar');
         $session = new Session(new MockArraySessionStorage());
-        $session->set('_security_context_key', serialize(new UsernamePasswordToken($user, '', 'context_key', array('ROLE_USER'))));
+        $session->set('_security_context_key', serialize(new UsernamePasswordToken($user, '', 'context_key', ['ROLE_USER'])));
 
         $request = new Request();
         $request->setSession($session);
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
index 08662acf16..53fedebcad 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/ExceptionListenerTest.php
@@ -63,13 +63,13 @@ class ExceptionListenerTest extends TestCase
 
     public function getAuthenticationExceptionProvider()
     {
-        return array(
-            array($e = new AuthenticationException(), new HttpException(Response::HTTP_UNAUTHORIZED, '', $e, array(), 0)),
-            array(new \LogicException('random', 0, $e = new AuthenticationException()), new HttpException(Response::HTTP_UNAUTHORIZED, '', $e, array(), 0)),
-            array(new \LogicException('random', 0, $e = new AuthenticationException('embed', 0, new AuthenticationException())), new HttpException(Response::HTTP_UNAUTHORIZED, 'embed', $e, array(), 0)),
-            array(new \LogicException('random', 0, $e = new AuthenticationException('embed', 0, new AccessDeniedException())), new HttpException(Response::HTTP_UNAUTHORIZED, 'embed', $e, array(), 0)),
-            array($e = new AuthenticationException('random', 0, new \LogicException()), new HttpException(Response::HTTP_UNAUTHORIZED, 'random', $e, array(), 0)),
-        );
+        return [
+            [$e = new AuthenticationException(), new HttpException(Response::HTTP_UNAUTHORIZED, '', $e, [], 0)],
+            [new \LogicException('random', 0, $e = new AuthenticationException()), new HttpException(Response::HTTP_UNAUTHORIZED, '', $e, [], 0)],
+            [new \LogicException('random', 0, $e = new AuthenticationException('embed', 0, new AuthenticationException())), new HttpException(Response::HTTP_UNAUTHORIZED, 'embed', $e, [], 0)],
+            [new \LogicException('random', 0, $e = new AuthenticationException('embed', 0, new AccessDeniedException())), new HttpException(Response::HTTP_UNAUTHORIZED, 'embed', $e, [], 0)],
+            [$e = new AuthenticationException('random', 0, new \LogicException()), new HttpException(Response::HTTP_UNAUTHORIZED, 'random', $e, [], 0)],
+        ];
     }
 
     public function testExceptionWhenEntryPointReturnsBadValue()
@@ -159,13 +159,13 @@ class ExceptionListenerTest extends TestCase
 
     public function getAccessDeniedExceptionProvider()
     {
-        return array(
-            array(new AccessDeniedException()),
-            array(new \LogicException('random', 0, $e = new AccessDeniedException()), $e),
-            array(new \LogicException('random', 0, $e = new AccessDeniedException('embed', new AccessDeniedException())), $e),
-            array(new \LogicException('random', 0, $e = new AccessDeniedException('embed', new AuthenticationException())), $e),
-            array(new AccessDeniedException('random', new \LogicException())),
-        );
+        return [
+            [new AccessDeniedException()],
+            [new \LogicException('random', 0, $e = new AccessDeniedException()), $e],
+            [new \LogicException('random', 0, $e = new AccessDeniedException('embed', new AccessDeniedException())), $e],
+            [new \LogicException('random', 0, $e = new AccessDeniedException('embed', new AuthenticationException())), $e],
+            [new AccessDeniedException('random', new \LogicException())],
+        ];
     }
 
     private function createEntryPoint(Response $response = null)
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
index c909c58eb4..fbcea3d738 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/LogoutListenerTest.php
@@ -191,7 +191,7 @@ class LogoutListenerTest extends TestCase
             ->method('getRequest')
             ->will($this->returnValue($request = new Request()));
 
-        return array($event, $request);
+        return [$event, $request];
     }
 
     private function getHandler()
@@ -212,16 +212,16 @@ class LogoutListenerTest extends TestCase
             $tokenStorage = $this->getTokenStorage(),
             $httpUtils = $this->getHttpUtils(),
             $successHandler ?: $this->getSuccessHandler(),
-            $options = array(
+            $options = [
                 'csrf_parameter' => '_csrf_token',
                 'csrf_token_id' => 'logout',
                 'logout_path' => '/logout',
                 'target_url' => '/',
-            ),
+            ],
             $tokenManager
         );
 
-        return array($listener, $tokenStorage, $httpUtils, $options);
+        return [$listener, $tokenStorage, $httpUtils, $options];
     }
 
     private function getSuccessHandler()
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
index 29a2c6f5c9..686c7231e6 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/RememberMeListenerTest.php
@@ -420,7 +420,7 @@ class RememberMeListenerTest extends TestCase
             $sessionStrategy = ($withSessionStrategy ? $this->getSessionStrategy() : null)
         );
 
-        return array($listener, $tokenStorage, $service, $manager, $logger, $dispatcher, $sessionStrategy);
+        return [$listener, $tokenStorage, $service, $manager, $logger, $dispatcher, $sessionStrategy];
     }
 
     protected function getLogger()
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
index c02812f6ce..ee5334c1e7 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/RemoteUserAuthenticationListenerTest.php
@@ -19,11 +19,11 @@ class RemoteUserAuthenticationListenerTest extends TestCase
 {
     public function testGetPreAuthenticatedData()
     {
-        $serverVars = array(
+        $serverVars = [
             'REMOTE_USER' => 'TheUser',
-        );
+        ];
 
-        $request = new Request(array(), array(), array(), array(), array(), $serverVars);
+        $request = new Request([], [], [], [], [], $serverVars);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
@@ -38,8 +38,8 @@ class RemoteUserAuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
-        $this->assertSame($result, array('TheUser', null));
+        $result = $method->invokeArgs($listener, [$request]);
+        $this->assertSame($result, ['TheUser', null]);
     }
 
     /**
@@ -47,7 +47,7 @@ class RemoteUserAuthenticationListenerTest extends TestCase
      */
     public function testGetPreAuthenticatedDataNoUser()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
@@ -62,16 +62,16 @@ class RemoteUserAuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
+        $result = $method->invokeArgs($listener, [$request]);
     }
 
     public function testGetPreAuthenticatedDataWithDifferentKeys()
     {
-        $userCredentials = array('TheUser', null);
+        $userCredentials = ['TheUser', null];
 
-        $request = new Request(array(), array(), array(), array(), array(), array(
+        $request = new Request([], [], [], [], [], [
             'TheUserKey' => 'TheUser',
-        ));
+        ]);
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
         $authenticationManager = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface')->getMock();
@@ -86,7 +86,7 @@ class RemoteUserAuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
+        $result = $method->invokeArgs($listener, [$request]);
         $this->assertSame($result, $userCredentials);
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
index 5a868e4d36..e35c9e97f2 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/SimplePreAuthenticationListenerTest.php
@@ -105,7 +105,7 @@ class SimplePreAuthenticationListenerTest extends TestCase
 
         $this->dispatcher = $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
 
-        $this->request = new Request(array(), array(), array(), array(), array(), array());
+        $this->request = new Request([], [], [], [], [], []);
 
         $this->event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\GetResponseEvent')->disableOriginalConstructor()->getMock();
         $this->event
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
index bdab1f24d5..2be2cc2207 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/SwitchUserListenerTest.php
@@ -81,7 +81,7 @@ class SwitchUserListenerTest extends TestCase
      */
     public function testExitUserThrowsAuthenticationExceptionIfOriginalTokenCannotBeFound()
     {
-        $token = new UsernamePasswordToken('username', '', 'key', array('ROLE_FOO'));
+        $token = new UsernamePasswordToken('username', '', 'key', ['ROLE_FOO']);
 
         $this->tokenStorage->setToken($token);
         $this->request->query->set('_switch_user', SwitchUserListener::EXIT_VALUE);
@@ -92,15 +92,15 @@ class SwitchUserListenerTest extends TestCase
 
     public function testExitUserUpdatesToken()
     {
-        $originalToken = new UsernamePasswordToken('username', '', 'key', array());
-        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', array(new SwitchUserRole('ROLE_PREVIOUS', $originalToken))));
+        $originalToken = new UsernamePasswordToken('username', '', 'key', []);
+        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', [new SwitchUserRole('ROLE_PREVIOUS', $originalToken)]));
 
         $this->request->query->set('_switch_user', SwitchUserListener::EXIT_VALUE);
 
         $listener = new SwitchUserListener($this->tokenStorage, $this->userProvider, $this->userChecker, 'provider123', $this->accessDecisionManager);
         $listener->handle($this->event);
 
-        $this->assertSame(array(), $this->request->query->all());
+        $this->assertSame([], $this->request->query->all());
         $this->assertSame('', $this->request->server->get('QUERY_STRING'));
         $this->assertInstanceOf('Symfony\Component\HttpFoundation\RedirectResponse', $this->event->getResponse());
         $this->assertSame($this->request->getUri(), $this->event->getResponse()->getTargetUrl());
@@ -118,7 +118,7 @@ class SwitchUserListenerTest extends TestCase
             ->with($originalUser)
             ->willReturn($refreshedUser);
         $originalToken = new UsernamePasswordToken($originalUser, '', 'key');
-        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', array(new SwitchUserRole('ROLE_PREVIOUS', $originalToken))));
+        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', [new SwitchUserRole('ROLE_PREVIOUS', $originalToken)]));
         $this->request->query->set('_switch_user', SwitchUserListener::EXIT_VALUE);
 
         $dispatcher = $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
@@ -142,7 +142,7 @@ class SwitchUserListenerTest extends TestCase
             ->expects($this->never())
             ->method('refreshUser');
         $originalToken = new UsernamePasswordToken($originalUser, '', 'key');
-        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', array(new SwitchUserRole('ROLE_PREVIOUS', $originalToken))));
+        $this->tokenStorage->setToken(new UsernamePasswordToken('username', '', 'key', [new SwitchUserRole('ROLE_PREVIOUS', $originalToken)]));
         $this->request->query->set('_switch_user', SwitchUserListener::EXIT_VALUE);
 
         $dispatcher = $this->getMockBuilder('Symfony\Component\EventDispatcher\EventDispatcherInterface')->getMock();
@@ -160,13 +160,13 @@ class SwitchUserListenerTest extends TestCase
      */
     public function testSwitchUserIsDisallowed()
     {
-        $token = new UsernamePasswordToken('username', '', 'key', array('ROLE_FOO'));
+        $token = new UsernamePasswordToken('username', '', 'key', ['ROLE_FOO']);
 
         $this->tokenStorage->setToken($token);
         $this->request->query->set('_switch_user', 'kuba');
 
         $this->accessDecisionManager->expects($this->once())
-            ->method('decide')->with($token, array('ROLE_ALLOWED_TO_SWITCH'))
+            ->method('decide')->with($token, ['ROLE_ALLOWED_TO_SWITCH'])
             ->will($this->returnValue(false));
 
         $listener = new SwitchUserListener($this->tokenStorage, $this->userProvider, $this->userChecker, 'provider123', $this->accessDecisionManager);
@@ -175,14 +175,14 @@ class SwitchUserListenerTest extends TestCase
 
     public function testSwitchUser()
     {
-        $token = new UsernamePasswordToken('username', '', 'key', array('ROLE_FOO'));
-        $user = new User('username', 'password', array());
+        $token = new UsernamePasswordToken('username', '', 'key', ['ROLE_FOO']);
+        $user = new User('username', 'password', []);
 
         $this->tokenStorage->setToken($token);
         $this->request->query->set('_switch_user', 'kuba');
 
         $this->accessDecisionManager->expects($this->once())
-            ->method('decide')->with($token, array('ROLE_ALLOWED_TO_SWITCH'), $user)
+            ->method('decide')->with($token, ['ROLE_ALLOWED_TO_SWITCH'], $user)
             ->will($this->returnValue(true));
 
         $this->userProvider->expects($this->once())
@@ -194,25 +194,25 @@ class SwitchUserListenerTest extends TestCase
         $listener = new SwitchUserListener($this->tokenStorage, $this->userProvider, $this->userChecker, 'provider123', $this->accessDecisionManager);
         $listener->handle($this->event);
 
-        $this->assertSame(array(), $this->request->query->all());
+        $this->assertSame([], $this->request->query->all());
         $this->assertSame('', $this->request->server->get('QUERY_STRING'));
         $this->assertInstanceOf('Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken', $this->tokenStorage->getToken());
     }
 
     public function testSwitchUserKeepsOtherQueryStringParameters()
     {
-        $token = new UsernamePasswordToken('username', '', 'key', array('ROLE_FOO'));
-        $user = new User('username', 'password', array());
+        $token = new UsernamePasswordToken('username', '', 'key', ['ROLE_FOO']);
+        $user = new User('username', 'password', []);
 
         $this->tokenStorage->setToken($token);
-        $this->request->query->replace(array(
+        $this->request->query->replace([
             '_switch_user' => 'kuba',
             'page' => 3,
             'section' => 2,
-        ));
+        ]);
 
         $this->accessDecisionManager->expects($this->once())
-            ->method('decide')->with($token, array('ROLE_ALLOWED_TO_SWITCH'), $user)
+            ->method('decide')->with($token, ['ROLE_ALLOWED_TO_SWITCH'], $user)
             ->will($this->returnValue(true));
 
         $this->userProvider->expects($this->once())
@@ -230,17 +230,17 @@ class SwitchUserListenerTest extends TestCase
 
     public function testSwitchUserWithReplacedToken()
     {
-        $user = new User('username', 'password', array());
-        $token = new UsernamePasswordToken($user, '', 'provider123', array('ROLE_FOO'));
+        $user = new User('username', 'password', []);
+        $token = new UsernamePasswordToken($user, '', 'provider123', ['ROLE_FOO']);
 
-        $user = new User('replaced', 'password', array());
-        $replacedToken = new UsernamePasswordToken($user, '', 'provider123', array('ROLE_BAR'));
+        $user = new User('replaced', 'password', []);
+        $replacedToken = new UsernamePasswordToken($user, '', 'provider123', ['ROLE_BAR']);
 
         $this->tokenStorage->setToken($token);
         $this->request->query->set('_switch_user', 'kuba');
 
         $this->accessDecisionManager->expects($this->any())
-            ->method('decide')->with($token, array('ROLE_ALLOWED_TO_SWITCH'), $user)
+            ->method('decide')->with($token, ['ROLE_ALLOWED_TO_SWITCH'], $user)
             ->will($this->returnValue(true));
 
         $this->userProvider->expects($this->any())
@@ -269,14 +269,14 @@ class SwitchUserListenerTest extends TestCase
 
     public function testSwitchUserStateless()
     {
-        $token = new UsernamePasswordToken('username', '', 'key', array('ROLE_FOO'));
-        $user = new User('username', 'password', array());
+        $token = new UsernamePasswordToken('username', '', 'key', ['ROLE_FOO']);
+        $user = new User('username', 'password', []);
 
         $this->tokenStorage->setToken($token);
         $this->request->query->set('_switch_user', 'kuba');
 
         $this->accessDecisionManager->expects($this->once())
-            ->method('decide')->with($token, array('ROLE_ALLOWED_TO_SWITCH'), $user)
+            ->method('decide')->with($token, ['ROLE_ALLOWED_TO_SWITCH'], $user)
             ->will($this->returnValue(true));
 
         $this->userProvider->expects($this->once())
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordFormAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
index 6ab543225c..198ee6566d 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordFormAuthenticationListenerTest.php
@@ -31,7 +31,7 @@ class UsernamePasswordFormAuthenticationListenerTest extends TestCase
      */
     public function testHandleWhenUsernameLength($username, $ok)
     {
-        $request = Request::create('/login_check', 'POST', array('_username' => $username));
+        $request = Request::create('/login_check', 'POST', ['_username' => $username]);
         $request->setSession($this->getMockBuilder('Symfony\Component\HttpFoundation\Session\SessionInterface')->getMock());
 
         $httpUtils = $this->getMockBuilder('Symfony\Component\Security\Http\HttpUtils')->getMock();
@@ -63,7 +63,7 @@ class UsernamePasswordFormAuthenticationListenerTest extends TestCase
             'TheProviderKey',
             $this->getMockBuilder('Symfony\Component\Security\Http\Authentication\AuthenticationSuccessHandlerInterface')->getMock(),
             $failureHandler,
-            array('require_previous_session' => false)
+            ['require_previous_session' => false]
         );
 
         $event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\GetResponseEvent')->disableOriginalConstructor()->getMock();
@@ -83,7 +83,7 @@ class UsernamePasswordFormAuthenticationListenerTest extends TestCase
      */
     public function testHandleNonStringUsername($postOnly)
     {
-        $request = Request::create('/login_check', 'POST', array('_username' => array()));
+        $request = Request::create('/login_check', 'POST', ['_username' => []]);
         $request->setSession($this->getMockBuilder('Symfony\Component\HttpFoundation\Session\SessionInterface')->getMock());
         $listener = new UsernamePasswordFormAuthenticationListener(
             new TokenStorage(),
@@ -93,7 +93,7 @@ class UsernamePasswordFormAuthenticationListenerTest extends TestCase
             'foo',
             new DefaultAuthenticationSuccessHandler($httpUtils),
             new DefaultAuthenticationFailureHandler($this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock(), $httpUtils),
-            array('require_previous_session' => false, 'post_only' => $postOnly)
+            ['require_previous_session' => false, 'post_only' => $postOnly]
         );
         $event = new GetResponseEvent($this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock(), $request, HttpKernelInterface::MASTER_REQUEST);
         $listener->handle($event);
@@ -101,17 +101,17 @@ class UsernamePasswordFormAuthenticationListenerTest extends TestCase
 
     public function postOnlyDataProvider()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 
     public function getUsernameForLength()
     {
-        return array(
-            array(str_repeat('x', Security::MAX_USERNAME_LENGTH + 1), false),
-            array(str_repeat('x', Security::MAX_USERNAME_LENGTH - 1), true),
-        );
+        return [
+            [str_repeat('x', Security::MAX_USERNAME_LENGTH + 1), false],
+            [str_repeat('x', Security::MAX_USERNAME_LENGTH - 1), true],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordJsonAuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordJsonAuthenticationListenerTest.php
index d8bb77bb9e..ed7acfbe5d 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordJsonAuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/UsernamePasswordJsonAuthenticationListenerTest.php
@@ -36,7 +36,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
      */
     private $listener;
 
-    private function createListener(array $options = array(), $success = true, $matchCheckPath = true)
+    private function createListener(array $options = [], $success = true, $matchCheckPath = true)
     {
         $tokenStorage = $this->getMockBuilder(TokenStorageInterface::class)->getMock();
         $httpUtils = $this->getMockBuilder(HttpUtils::class)->getMock();
@@ -66,7 +66,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testHandleSuccessIfRequestContentTypeIsJson()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -76,7 +76,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testSuccessIfRequestFormatIsJsonLD()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array(), '{"username": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], [], '{"username": "dunglas", "password": "foo"}');
         $request->setRequestFormat('json-ld');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
@@ -86,8 +86,8 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
 
     public function testHandleFailure()
     {
-        $this->createListener(array(), false);
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": "foo"}');
+        $this->createListener([], false);
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -96,8 +96,8 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
 
     public function testUsePath()
     {
-        $this->createListener(array('username_path' => 'user.login', 'password_path' => 'user.pwd'));
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"user": {"login": "dunglas", "pwd": "foo"}}');
+        $this->createListener(['username_path' => 'user.login', 'password_path' => 'user.pwd']);
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"user": {"login": "dunglas", "pwd": "foo"}}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -125,7 +125,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testAttemptAuthenticationNoUsername()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"usr": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"usr": "dunglas", "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -138,7 +138,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testAttemptAuthenticationNoPassword()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "pass": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "pass": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -151,7 +151,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testAttemptAuthenticationUsernameNotAString()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": 1, "password": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": 1, "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -164,7 +164,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testAttemptAuthenticationPasswordNotAString()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": 1}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": 1}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -174,7 +174,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     {
         $this->createListener();
         $username = str_repeat('x', Security::MAX_USERNAME_LENGTH + 1);
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), sprintf('{"username": "%s", "password": 1}', $username));
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], sprintf('{"username": "%s", "password": 1}', $username));
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -183,8 +183,8 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
 
     public function testDoesNotAttemptAuthenticationIfRequestPathDoesNotMatchCheckPath()
     {
-        $this->createListener(array('check_path' => '/'), true, false);
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'));
+        $this->createListener(['check_path' => '/'], true, false);
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json']);
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
         $event->setResponse(new Response('original'));
 
@@ -195,7 +195,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testDoesNotAttemptAuthenticationIfRequestContentTypeIsNotJson()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array(), '{"username": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], [], '{"username": "dunglas", "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
         $event->setResponse(new Response('original'));
 
@@ -205,8 +205,8 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
 
     public function testAttemptAuthenticationIfRequestPathMatchesCheckPath()
     {
-        $this->createListener(array('check_path' => '/'));
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": "foo"}');
+        $this->createListener(['check_path' => '/']);
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": "foo"}');
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
         $this->listener->handle($event);
@@ -216,7 +216,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testNoErrorOnMissingSessionStrategy()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": "foo"}');
         $this->configurePreviousSession($request);
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
@@ -227,7 +227,7 @@ class UsernamePasswordJsonAuthenticationListenerTest extends TestCase
     public function testMigratesViaSessionStrategy()
     {
         $this->createListener();
-        $request = new Request(array(), array(), array(), array(), array(), array('HTTP_CONTENT_TYPE' => 'application/json'), '{"username": "dunglas", "password": "foo"}');
+        $request = new Request([], [], [], [], [], ['HTTP_CONTENT_TYPE' => 'application/json'], '{"username": "dunglas", "password": "foo"}');
         $this->configurePreviousSession($request);
         $event = new GetResponseEvent($this->getMockBuilder(KernelInterface::class)->getMock(), $request, KernelInterface::MASTER_REQUEST);
 
diff --git a/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php b/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
index 07206202ab..c55eaae0f3 100644
--- a/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Firewall/X509AuthenticationListenerTest.php
@@ -22,7 +22,7 @@ class X509AuthenticationListenerTest extends TestCase
      */
     public function testGetPreAuthenticatedData($user, $credentials)
     {
-        $serverVars = array();
+        $serverVars = [];
         if ('' !== $user) {
             $serverVars['SSL_CLIENT_S_DN_Email'] = $user;
         }
@@ -30,7 +30,7 @@ class X509AuthenticationListenerTest extends TestCase
             $serverVars['SSL_CLIENT_S_DN'] = $credentials;
         }
 
-        $request = new Request(array(), array(), array(), array(), array(), $serverVars);
+        $request = new Request([], [], [], [], [], $serverVars);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
@@ -41,16 +41,16 @@ class X509AuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
-        $this->assertSame($result, array($user, $credentials));
+        $result = $method->invokeArgs($listener, [$request]);
+        $this->assertSame($result, [$user, $credentials]);
     }
 
     public static function dataProviderGetPreAuthenticatedData()
     {
-        return array(
-            'validValues' => array('TheUser', 'TheCredentials'),
-            'noCredentials' => array('TheUser', ''),
-        );
+        return [
+            'validValues' => ['TheUser', 'TheCredentials'],
+            'noCredentials' => ['TheUser', ''],
+        ];
     }
 
     /**
@@ -59,7 +59,7 @@ class X509AuthenticationListenerTest extends TestCase
     public function testGetPreAuthenticatedDataNoUser($emailAddress)
     {
         $credentials = 'CN=Sample certificate DN/emailAddress='.$emailAddress;
-        $request = new Request(array(), array(), array(), array(), array(), array('SSL_CLIENT_S_DN' => $credentials));
+        $request = new Request([], [], [], [], [], ['SSL_CLIENT_S_DN' => $credentials]);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
@@ -70,16 +70,16 @@ class X509AuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
-        $this->assertSame($result, array($emailAddress, $credentials));
+        $result = $method->invokeArgs($listener, [$request]);
+        $this->assertSame($result, [$emailAddress, $credentials]);
     }
 
     public static function dataProviderGetPreAuthenticatedDataNoUser()
     {
-        return array(
-            'basicEmailAddress' => array('cert@example.com'),
-            'emailAddressWithPlusSign' => array('cert+something@example.com'),
-        );
+        return [
+            'basicEmailAddress' => ['cert@example.com'],
+            'emailAddressWithPlusSign' => ['cert+something@example.com'],
+        ];
     }
 
     /**
@@ -87,7 +87,7 @@ class X509AuthenticationListenerTest extends TestCase
      */
     public function testGetPreAuthenticatedDataNoData()
     {
-        $request = new Request(array(), array(), array(), array(), array(), array());
+        $request = new Request([], [], [], [], [], []);
 
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
@@ -98,17 +98,17 @@ class X509AuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
+        $result = $method->invokeArgs($listener, [$request]);
     }
 
     public function testGetPreAuthenticatedDataWithDifferentKeys()
     {
-        $userCredentials = array('TheUser', 'TheCredentials');
+        $userCredentials = ['TheUser', 'TheCredentials'];
 
-        $request = new Request(array(), array(), array(), array(), array(), array(
+        $request = new Request([], [], [], [], [], [
             'TheUserKey' => 'TheUser',
             'TheCredentialsKey' => 'TheCredentials',
-        ));
+        ]);
         $tokenStorage = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface')->getMock();
 
         $authenticationManager = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\AuthenticationManagerInterface')->getMock();
@@ -118,7 +118,7 @@ class X509AuthenticationListenerTest extends TestCase
         $method = new \ReflectionMethod($listener, 'getPreAuthenticatedData');
         $method->setAccessible(true);
 
-        $result = $method->invokeArgs($listener, array($request));
+        $result = $method->invokeArgs($listener, [$request]);
         $this->assertSame($result, $userCredentials);
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php b/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
index 5cd9d7dea3..04fe3b4ea3 100644
--- a/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/FirewallMapTest.php
@@ -31,7 +31,7 @@ class FirewallMapTest extends TestCase
             ->will($this->returnValue(false))
         ;
 
-        $map->add($notMatchingMatcher, array($this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()));
+        $map->add($notMatchingMatcher, [$this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()]);
 
         $matchingMatcher = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestMatcher')->getMock();
         $matchingMatcher
@@ -43,7 +43,7 @@ class FirewallMapTest extends TestCase
         $theListener = $this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock();
         $theException = $this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ExceptionListener')->disableOriginalConstructor()->getMock();
 
-        $map->add($matchingMatcher, array($theListener), $theException);
+        $map->add($matchingMatcher, [$theListener], $theException);
 
         $tooLateMatcher = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestMatcher')->getMock();
         $tooLateMatcher
@@ -51,11 +51,11 @@ class FirewallMapTest extends TestCase
             ->method('matches')
         ;
 
-        $map->add($tooLateMatcher, array($this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()));
+        $map->add($tooLateMatcher, [$this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()]);
 
         list($listeners, $exception) = $map->getListeners($request);
 
-        $this->assertEquals(array($theListener), $listeners);
+        $this->assertEquals([$theListener], $listeners);
         $this->assertEquals($theException, $exception);
     }
 
@@ -73,12 +73,12 @@ class FirewallMapTest extends TestCase
             ->will($this->returnValue(false))
         ;
 
-        $map->add($notMatchingMatcher, array($this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()));
+        $map->add($notMatchingMatcher, [$this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()]);
 
         $theListener = $this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock();
         $theException = $this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ExceptionListener')->disableOriginalConstructor()->getMock();
 
-        $map->add(null, array($theListener), $theException);
+        $map->add(null, [$theListener], $theException);
 
         $tooLateMatcher = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestMatcher')->getMock();
         $tooLateMatcher
@@ -86,11 +86,11 @@ class FirewallMapTest extends TestCase
             ->method('matches')
         ;
 
-        $map->add($tooLateMatcher, array($this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()));
+        $map->add($tooLateMatcher, [$this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()]);
 
         list($listeners, $exception) = $map->getListeners($request);
 
-        $this->assertEquals(array($theListener), $listeners);
+        $this->assertEquals([$theListener], $listeners);
         $this->assertEquals($theException, $exception);
     }
 
@@ -108,11 +108,11 @@ class FirewallMapTest extends TestCase
             ->will($this->returnValue(false))
         ;
 
-        $map->add($notMatchingMatcher, array($this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()));
+        $map->add($notMatchingMatcher, [$this->getMockBuilder('Symfony\Component\Security\Http\Firewall\ListenerInterface')->getMock()]);
 
         list($listeners, $exception) = $map->getListeners($request);
 
-        $this->assertEquals(array(), $listeners);
+        $this->assertEquals([], $listeners);
         $this->assertNull($exception);
     }
 }
diff --git a/src/Symfony/Component/Security/Http/Tests/FirewallTest.php b/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
index bc7db4d506..7a601f6050 100644
--- a/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/FirewallTest.php
@@ -41,7 +41,7 @@ class FirewallTest extends TestCase
             ->expects($this->once())
             ->method('getListeners')
             ->with($this->equalTo($request))
-            ->will($this->returnValue(array(array(), $listener, null)))
+            ->will($this->returnValue([[], $listener, null]))
         ;
 
         $event = new GetResponseEvent($this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock(), $request, HttpKernelInterface::MASTER_REQUEST);
@@ -70,16 +70,16 @@ class FirewallTest extends TestCase
         $map
             ->expects($this->once())
             ->method('getListeners')
-            ->will($this->returnValue(array(array($first, $second), null, null)))
+            ->will($this->returnValue([[$first, $second], null, null]))
         ;
 
         $event = $this->getMockBuilder('Symfony\Component\HttpKernel\Event\GetResponseEvent')
-            ->setMethods(array('hasResponse'))
-            ->setConstructorArgs(array(
+            ->setMethods(['hasResponse'])
+            ->setConstructorArgs([
                 $this->getMockBuilder('Symfony\Component\HttpKernel\HttpKernelInterface')->getMock(),
                 $this->getMockBuilder('Symfony\Component\HttpFoundation\Request')->disableOriginalConstructor()->disableOriginalClone()->getMock(),
                 HttpKernelInterface::MASTER_REQUEST,
-            ))
+            ])
             ->getMock()
         ;
         $event
@@ -134,7 +134,7 @@ class FirewallTest extends TestCase
             ->expects($this->once())
             ->method('getListeners')
             ->with($this->equalTo($request))
-            ->willReturn(array(array(), $listener))
+            ->willReturn([[], $listener])
         ;
 
         $firewall = new Firewall($map, $dispatcher);
diff --git a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
index ace88e328a..5368f4683c 100644
--- a/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/HttpUtilsTest.php
@@ -67,13 +67,13 @@ class HttpUtilsTest extends TestCase
 
     public function badRequestDomainUrls()
     {
-        return array(
-            array('http://pirate.net/foo'),
-            array('http:\\\\pirate.net/foo'),
-            array('http:/\\pirate.net/foo'),
-            array('http:\\/pirate.net/foo'),
-            array('http://////pirate.net/foo'),
-        );
+        return [
+            ['http://pirate.net/foo'],
+            ['http:\\\\pirate.net/foo'],
+            ['http:/\\pirate.net/foo'],
+            ['http:\\/pirate.net/foo'],
+            ['http://////pirate.net/foo'],
+        ];
     }
 
     public function testCreateRedirectResponseWithProtocolRelativeTarget()
@@ -91,7 +91,7 @@ class HttpUtilsTest extends TestCase
         $urlGenerator
             ->expects($this->any())
             ->method('generate')
-            ->with('foobar', array(), UrlGeneratorInterface::ABSOLUTE_URL)
+            ->with('foobar', [], UrlGeneratorInterface::ABSOLUTE_URL)
             ->will($this->returnValue('http://localhost/foo/bar'))
         ;
         $urlGenerator
@@ -173,11 +173,11 @@ class HttpUtilsTest extends TestCase
 
     public function provideSecurityContextAttributes()
     {
-        return array(
-            array(Security::AUTHENTICATION_ERROR),
-            array(Security::ACCESS_DENIED_ERROR),
-            array(Security::LAST_USERNAME),
-        );
+        return [
+            [Security::AUTHENTICATION_ERROR],
+            [Security::ACCESS_DENIED_ERROR],
+            [Security::LAST_USERNAME],
+        ];
     }
 
     public function testCheckRequestPath()
@@ -215,7 +215,7 @@ class HttpUtilsTest extends TestCase
             ->expects($this->any())
             ->method('matchRequest')
             ->with($request)
-            ->willThrowException(new MethodNotAllowedException(array()))
+            ->willThrowException(new MethodNotAllowedException([]))
         ;
 
         $utils = new HttpUtils(null, $urlMatcher);
@@ -229,7 +229,7 @@ class HttpUtilsTest extends TestCase
             ->expects($this->any())
             ->method('match')
             ->with('/foo/bar')
-            ->will($this->returnValue(array('_route' => 'foobar')))
+            ->will($this->returnValue(['_route' => 'foobar']))
         ;
 
         $utils = new HttpUtils(null, $urlMatcher);
@@ -244,7 +244,7 @@ class HttpUtilsTest extends TestCase
             ->expects($this->any())
             ->method('matchRequest')
             ->with($request)
-            ->will($this->returnValue(array('_route' => 'foobar')))
+            ->will($this->returnValue(['_route' => 'foobar']))
         ;
 
         $utils = new HttpUtils(null, $urlMatcher);
@@ -273,7 +273,7 @@ class HttpUtilsTest extends TestCase
         $urlMatcher
             ->expects($this->any())
             ->method('match')
-            ->willReturn(array('_controller' => 'PathController'))
+            ->willReturn(['_controller' => 'PathController'])
         ;
 
         $utils = new HttpUtils(null, $urlMatcher);
diff --git a/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php b/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
index f199d0ee03..8dcc10338b 100644
--- a/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/Logout/CookieClearingLogoutHandlerTest.php
@@ -25,7 +25,7 @@ class CookieClearingLogoutHandlerTest extends TestCase
         $response = new Response();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
-        $handler = new CookieClearingLogoutHandler(array('foo' => array('path' => '/foo', 'domain' => 'foo.foo'), 'foo2' => array('path' => null, 'domain' => null)));
+        $handler = new CookieClearingLogoutHandler(['foo' => ['path' => '/foo', 'domain' => 'foo.foo'], 'foo2' => ['path' => null, 'domain' => null]]);
 
         $cookies = $response->headers->getCookies();
         $this->assertCount(0, $cookies);
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
index 5a35dd09ee..38b8474ffc 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/AbstractRememberMeServicesTest.php
@@ -21,7 +21,7 @@ class AbstractRememberMeServicesTest extends TestCase
 {
     public function testGetRememberMeParameter()
     {
-        $service = $this->getService(null, array('remember_me_parameter' => 'foo'));
+        $service = $this->getService(null, ['remember_me_parameter' => 'foo']);
 
         $this->assertEquals('foo', $service->getRememberMeParameter());
     }
@@ -34,7 +34,7 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function testAutoLoginReturnsNullWhenNoCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
 
         $this->assertNull($service->autoLogin(new Request()));
     }
@@ -44,7 +44,7 @@ class AbstractRememberMeServicesTest extends TestCase
      */
     public function testAutoLoginThrowsExceptionWhenImplementationDoesNotReturnUserInterface()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
         $request->cookies->set('foo', 'foo');
 
@@ -59,7 +59,7 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function testAutoLogin()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
         $request->cookies->set('foo', 'foo');
 
@@ -67,7 +67,7 @@ class AbstractRememberMeServicesTest extends TestCase
         $user
             ->expects($this->once())
             ->method('getRoles')
-            ->will($this->returnValue(array()))
+            ->will($this->returnValue([]))
         ;
 
         $service
@@ -105,15 +105,15 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function provideOptionsForLogout()
     {
-        return array(
-            array(array('name' => 'foo', 'path' => '/', 'domain' => null, 'secure' => false, 'httponly' => true)),
-            array(array('name' => 'foo', 'path' => '/bar', 'domain' => 'baz.com', 'secure' => true, 'httponly' => false)),
-        );
+        return [
+            [['name' => 'foo', 'path' => '/', 'domain' => null, 'secure' => false, 'httponly' => true]],
+            [['name' => 'foo', 'path' => '/bar', 'domain' => 'baz.com', 'secure' => true, 'httponly' => false]],
+        ];
     }
 
     public function testLoginFail()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
 
         $service->loginFail($request);
@@ -123,7 +123,7 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function testLoginSuccessIsNotProcessedWhenTokenDoesNotContainUserInterfaceImplementation()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null]);
         $request = new Request();
         $response = new Response();
         $account = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
@@ -146,7 +146,7 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function testLoginSuccessIsNotProcessedWhenRememberMeIsNotRequested()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
         $response = new Response();
         $account = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
@@ -170,7 +170,7 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function testLoginSuccessWhenRememberMeAlwaysIsTrue()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null]);
         $request = new Request();
         $response = new Response();
         $account = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
@@ -195,10 +195,10 @@ class AbstractRememberMeServicesTest extends TestCase
      */
     public function testLoginSuccessWhenRememberMeParameterWithPathIsPositive($value)
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo[bar]', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo[bar]', 'path' => null, 'domain' => null]);
 
         $request = new Request();
-        $request->request->set('foo', array('bar' => $value));
+        $request->request->set('foo', ['bar' => $value]);
         $response = new Response();
         $account = $this->getMockBuilder('Symfony\Component\Security\Core\User\UserInterface')->getMock();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -222,7 +222,7 @@ class AbstractRememberMeServicesTest extends TestCase
      */
     public function testLoginSuccessWhenRememberMeParameterIsPositive($value)
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => false, 'remember_me_parameter' => 'foo', 'path' => null, 'domain' => null]);
 
         $request = new Request();
         $request->request->set('foo', $value);
@@ -246,24 +246,24 @@ class AbstractRememberMeServicesTest extends TestCase
 
     public function getPositiveRememberMeParameterValues()
     {
-        return array(
-            array('true'),
-            array('1'),
-            array('on'),
-            array('yes'),
-            array(true),
-        );
+        return [
+            ['true'],
+            ['1'],
+            ['on'],
+            ['yes'],
+            [true],
+        ];
     }
 
     public function testEncodeCookieAndDecodeCookieAreInvertible()
     {
-        $cookieParts = array('aa', 'bb', 'cc');
+        $cookieParts = ['aa', 'bb', 'cc'];
         $service = $this->getService();
 
-        $encoded = $this->callProtected($service, 'encodeCookie', array($cookieParts));
+        $encoded = $this->callProtected($service, 'encodeCookie', [$cookieParts]);
         $this->assertInternalType('string', $encoded);
 
-        $decoded = $this->callProtected($service, 'decodeCookie', array($encoded));
+        $decoded = $this->callProtected($service, 'decodeCookie', [$encoded]);
         $this->assertSame($cookieParts, $decoded);
     }
 
@@ -273,21 +273,21 @@ class AbstractRememberMeServicesTest extends TestCase
      */
     public function testThereShouldBeNoCookieDelimiterInCookieParts()
     {
-        $cookieParts = array('aa', 'b'.AbstractRememberMeServices::COOKIE_DELIMITER.'b', 'cc');
+        $cookieParts = ['aa', 'b'.AbstractRememberMeServices::COOKIE_DELIMITER.'b', 'cc'];
         $service = $this->getService();
 
-        $this->callProtected($service, 'encodeCookie', array($cookieParts));
+        $this->callProtected($service, 'encodeCookie', [$cookieParts]);
     }
 
-    protected function getService($userProvider = null, $options = array(), $logger = null)
+    protected function getService($userProvider = null, $options = [], $logger = null)
     {
         if (null === $userProvider) {
             $userProvider = $this->getProvider();
         }
 
-        return $this->getMockForAbstractClass('Symfony\Component\Security\Http\RememberMe\AbstractRememberMeServices', array(
-            array($userProvider), 'foosecret', 'fookey', $options, $logger,
-        ));
+        return $this->getMockForAbstractClass('Symfony\Component\Security\Http\RememberMe\AbstractRememberMeServices', [
+            [$userProvider], 'foosecret', 'fookey', $options, $logger,
+        ]);
     }
 
     protected function getProvider()
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
index 5405bc1b04..506cfea61c 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/PersistentTokenBasedRememberMeServicesTest.php
@@ -36,14 +36,14 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testAutoLoginReturnsNullWhenNoCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo'));
+        $service = $this->getService(null, ['name' => 'foo']);
 
         $this->assertNull($service->autoLogin(new Request()));
     }
 
     public function testAutoLoginThrowsExceptionOnInvalidCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo'));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo']);
         $request = new Request();
         $request->request->set('foo', 'true');
         $request->cookies->set('foo', 'foo');
@@ -54,13 +54,13 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testAutoLoginThrowsExceptionOnNonExistentToken()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo'));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo']);
         $request = new Request();
         $request->request->set('foo', 'true');
-        $request->cookies->set('foo', $this->encodeCookie(array(
+        $request->cookies->set('foo', $this->encodeCookie([
             $series = 'fooseries',
             $tokenValue = 'foovalue',
-        )));
+        ]));
 
         $tokenProvider = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\RememberMe\TokenProviderInterface')->getMock();
         $tokenProvider
@@ -77,9 +77,9 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
     public function testAutoLoginReturnsNullOnNonExistentUser()
     {
         $userProvider = $this->getProvider();
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600, 'secure' => false, 'httponly' => false));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600, 'secure' => false, 'httponly' => false]);
         $request = new Request();
-        $request->cookies->set('foo', $this->encodeCookie(array('fooseries', 'foovalue')));
+        $request->cookies->set('foo', $this->encodeCookie(['fooseries', 'foovalue']));
 
         $tokenProvider = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\RememberMe\TokenProviderInterface')->getMock();
         $tokenProvider
@@ -102,9 +102,9 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
     public function testAutoLoginThrowsExceptionOnStolenCookieAndRemovesItFromThePersistentBackend()
     {
         $userProvider = $this->getProvider();
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true]);
         $request = new Request();
-        $request->cookies->set('foo', $this->encodeCookie(array('fooseries', 'foovalue')));
+        $request->cookies->set('foo', $this->encodeCookie(['fooseries', 'foovalue']));
 
         $tokenProvider = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\RememberMe\TokenProviderInterface')->getMock();
         $service->setTokenProvider($tokenProvider);
@@ -133,9 +133,9 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testAutoLoginDoesNotAcceptAnExpiredCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
-        $request->cookies->set('foo', $this->encodeCookie(array('fooseries', 'foovalue')));
+        $request->cookies->set('foo', $this->encodeCookie(['fooseries', 'foovalue']));
 
         $tokenProvider = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\RememberMe\TokenProviderInterface')->getMock();
         $tokenProvider
@@ -156,7 +156,7 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
         $user
             ->expects($this->once())
             ->method('getRoles')
-            ->will($this->returnValue(array('ROLE_FOO')))
+            ->will($this->returnValue(['ROLE_FOO']))
         ;
 
         $userProvider = $this->getProvider();
@@ -167,9 +167,9 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
             ->will($this->returnValue($user))
         ;
 
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'secure' => false, 'httponly' => false, 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'secure' => false, 'httponly' => false, 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
-        $request->cookies->set('foo', $this->encodeCookie(array('fooseries', 'foovalue')));
+        $request->cookies->set('foo', $this->encodeCookie(['fooseries', 'foovalue']));
 
         $tokenProvider = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\RememberMe\TokenProviderInterface')->getMock();
         $tokenProvider
@@ -190,9 +190,9 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testLogout()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => '/foo', 'domain' => 'foodomain.foo', 'secure' => true, 'httponly' => false));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => '/foo', 'domain' => 'foodomain.foo', 'secure' => true, 'httponly' => false]);
         $request = new Request();
-        $request->cookies->set('foo', $this->encodeCookie(array('fooseries', 'foovalue')));
+        $request->cookies->set('foo', $this->encodeCookie(['fooseries', 'foovalue']));
         $response = new Response();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
 
@@ -217,7 +217,7 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testLogoutSimplyIgnoresNonSetRequestCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
         $response = new Response();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -239,7 +239,7 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testLogoutSimplyIgnoresInvalidCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
         $request->cookies->set('foo', 'somefoovalue');
         $response = new Response();
@@ -259,7 +259,7 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testLoginFail()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null]);
         $request = new Request();
 
         $this->assertFalse($request->attributes->has(RememberMeServicesInterface::COOKIE_ATTR_NAME));
@@ -269,7 +269,7 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
 
     public function testLoginSuccessSetsCookieWhenLoggedInWithNonRememberMeTokenInterfaceImplementation()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'domain' => 'myfoodomain.foo', 'path' => '/foo/path', 'secure' => true, 'httponly' => true, 'samesite' => Cookie::SAMESITE_STRICT, 'lifetime' => 3600, 'always_remember_me' => true));
+        $service = $this->getService(null, ['name' => 'foo', 'domain' => 'myfoodomain.foo', 'path' => '/foo/path', 'secure' => true, 'httponly' => true, 'samesite' => Cookie::SAMESITE_STRICT, 'lifetime' => 3600, 'always_remember_me' => true]);
         $request = new Request();
         $response = new Response();
 
@@ -318,13 +318,13 @@ class PersistentTokenBasedRememberMeServicesTest extends TestCase
         return $r->invoke($service, $parts);
     }
 
-    protected function getService($userProvider = null, $options = array(), $logger = null)
+    protected function getService($userProvider = null, $options = [], $logger = null)
     {
         if (null === $userProvider) {
             $userProvider = $this->getProvider();
         }
 
-        return new PersistentTokenBasedRememberMeServices(array($userProvider), 'foosecret', 'fookey', $options, $logger);
+        return new PersistentTokenBasedRememberMeServices([$userProvider], 'foosecret', 'fookey', $options, $logger);
     }
 
     protected function getProvider()
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
index 24b80b2a91..e72bf26313 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/ResponseListenerTest.php
@@ -26,9 +26,9 @@ class ResponseListenerTest extends TestCase
     {
         $cookie = new Cookie('rememberme', null, 0, '/', null, false, true, false, null);
 
-        $request = $this->getRequest(array(
+        $request = $this->getRequest([
             RememberMeServicesInterface::COOKIE_ATTR_NAME => $cookie,
-        ));
+        ]);
 
         $response = $this->getResponse();
         $response->headers->expects($this->once())->method('setCookie')->with($cookie);
@@ -41,9 +41,9 @@ class ResponseListenerTest extends TestCase
     {
         $cookie = new Cookie('rememberme', null, 0, '/', null, false, true, false, null);
 
-        $request = $this->getRequest(array(
+        $request = $this->getRequest([
             RememberMeServicesInterface::COOKIE_ATTR_NAME => $cookie,
-        ));
+        ]);
 
         $response = $this->getResponse();
         $response->headers->expects($this->never())->method('setCookie');
@@ -67,10 +67,10 @@ class ResponseListenerTest extends TestCase
     {
         $listener = new ResponseListener();
 
-        $this->assertSame(array(KernelEvents::RESPONSE => 'onKernelResponse'), ResponseListener::getSubscribedEvents());
+        $this->assertSame([KernelEvents::RESPONSE => 'onKernelResponse'], ResponseListener::getSubscribedEvents());
     }
 
-    private function getRequest(array $attributes = array())
+    private function getRequest(array $attributes = [])
     {
         $request = new Request();
 
diff --git a/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php b/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
index de25e3a6d5..e71e650a4d 100644
--- a/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
+++ b/src/Symfony/Component/Security/Http/Tests/RememberMe/TokenBasedRememberMeServicesTest.php
@@ -24,14 +24,14 @@ class TokenBasedRememberMeServicesTest extends TestCase
 {
     public function testAutoLoginReturnsNullWhenNoCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo'));
+        $service = $this->getService(null, ['name' => 'foo']);
 
         $this->assertNull($service->autoLogin(new Request()));
     }
 
     public function testAutoLoginThrowsExceptionOnInvalidCookie()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo'));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => false, 'remember_me_parameter' => 'foo']);
         $request = new Request();
         $request->request->set('foo', 'true');
         $request->cookies->set('foo', 'foo');
@@ -43,7 +43,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
     public function testAutoLoginThrowsExceptionOnNonExistentUser()
     {
         $userProvider = $this->getProvider();
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
         $request->cookies->set('foo', $this->getCookie('fooclass', 'foouser', time() + 3600, 'foopass'));
 
@@ -60,7 +60,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
     public function testAutoLoginDoesNotAcceptCookieWithInvalidHash()
     {
         $userProvider = $this->getProvider();
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
         $request->cookies->set('foo', base64_encode('class:'.base64_encode('foouser').':123456789:fooHash'));
 
@@ -85,7 +85,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
     public function testAutoLoginDoesNotAcceptAnExpiredCookie()
     {
         $userProvider = $this->getProvider();
-        $service = $this->getService($userProvider, array('name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'path' => null, 'domain' => null, 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
         $request->cookies->set('foo', $this->getCookie('fooclass', 'foouser', time() - 1, 'foopass'));
 
@@ -118,7 +118,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
         $user
             ->expects($this->once())
             ->method('getRoles')
-            ->will($this->returnValue(array('ROLE_FOO')))
+            ->will($this->returnValue(['ROLE_FOO']))
         ;
         $user
             ->expects($this->once())
@@ -134,7 +134,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
             ->will($this->returnValue($user))
         ;
 
-        $service = $this->getService($userProvider, array('name' => 'foo', 'always_remember_me' => true, 'lifetime' => 3600));
+        $service = $this->getService($userProvider, ['name' => 'foo', 'always_remember_me' => true, 'lifetime' => 3600]);
         $request = new Request();
         $request->cookies->set('foo', $this->getCookie('fooclass', $username, time() + 3600, 'foopass'));
 
@@ -147,15 +147,15 @@ class TokenBasedRememberMeServicesTest extends TestCase
 
     public function provideUsernamesForAutoLogin()
     {
-        return array(
-            array('foouser', 'Simple username'),
-            array('foo'.TokenBasedRememberMeServices::COOKIE_DELIMITER.'user', 'Username might contain the delimiter'),
-        );
+        return [
+            ['foouser', 'Simple username'],
+            ['foo'.TokenBasedRememberMeServices::COOKIE_DELIMITER.'user', 'Username might contain the delimiter'],
+        ];
     }
 
     public function testLogout()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => null, 'domain' => null, 'secure' => true, 'httponly' => false));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => null, 'domain' => null, 'secure' => true, 'httponly' => false]);
         $request = new Request();
         $response = new Response();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -172,7 +172,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
 
     public function testLoginFail()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'path' => '/foo', 'domain' => 'foodomain.foo'));
+        $service = $this->getService(null, ['name' => 'foo', 'path' => '/foo', 'domain' => 'foodomain.foo']);
         $request = new Request();
 
         $service->loginFail($request);
@@ -185,7 +185,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
 
     public function testLoginSuccessIgnoresTokensWhichDoNotContainAnUserInterfaceImplementation()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null));
+        $service = $this->getService(null, ['name' => 'foo', 'always_remember_me' => true, 'path' => null, 'domain' => null]);
         $request = new Request();
         $response = new Response();
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
@@ -206,7 +206,7 @@ class TokenBasedRememberMeServicesTest extends TestCase
 
     public function testLoginSuccess()
     {
-        $service = $this->getService(null, array('name' => 'foo', 'domain' => 'myfoodomain.foo', 'path' => '/foo/path', 'secure' => true, 'httponly' => true, 'samesite' => Cookie::SAMESITE_STRICT, 'lifetime' => 3600, 'always_remember_me' => true));
+        $service = $this->getService(null, ['name' => 'foo', 'domain' => 'myfoodomain.foo', 'path' => '/foo/path', 'secure' => true, 'httponly' => true, 'samesite' => Cookie::SAMESITE_STRICT, 'lifetime' => 3600, 'always_remember_me' => true]);
         $request = new Request();
         $response = new Response();
 
@@ -262,13 +262,13 @@ class TokenBasedRememberMeServicesTest extends TestCase
         return $r->invoke($service, $parts);
     }
 
-    protected function getService($userProvider = null, $options = array(), $logger = null)
+    protected function getService($userProvider = null, $options = [], $logger = null)
     {
         if (null === $userProvider) {
             $userProvider = $this->getProvider();
         }
 
-        $service = new TokenBasedRememberMeServices(array($userProvider), 'foosecret', 'fookey', $options, $logger);
+        $service = new TokenBasedRememberMeServices([$userProvider], 'foosecret', 'fookey', $options, $logger);
 
         return $service;
     }
diff --git a/src/Symfony/Component/Serializer/CHANGELOG.md b/src/Symfony/Component/Serializer/CHANGELOG.md
index a82a7c6b2d..99f32abff1 100644
--- a/src/Symfony/Component/Serializer/CHANGELOG.md
+++ b/src/Symfony/Component/Serializer/CHANGELOG.md
@@ -59,7 +59,7 @@ CHANGELOG
  * removed the `Serializer::$normalizerCache` and `Serializer::$denormalizerCache`
    properties
  * added an optional `string $format = null` argument to `AbstractNormalizer::instantiateObject`
- * added an optional `array $context = array()` to `Serializer::supportsNormalization`, `Serializer::supportsDenormalization`,
+ * added an optional `array $context = []` to `Serializer::supportsNormalization`, `Serializer::supportsDenormalization`,
    `Serializer::supportsEncoding` and `Serializer::supportsDecoding`
 
 3.4.0
diff --git a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
index d4cfa4b11c..0100a6282f 100644
--- a/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/ChainDecoder.php
@@ -24,10 +24,10 @@ use Symfony\Component\Serializer\Exception\RuntimeException;
  */
 class ChainDecoder implements ContextAwareDecoderInterface
 {
-    protected $decoders = array();
-    protected $decoderByFormat = array();
+    protected $decoders = [];
+    protected $decoderByFormat = [];
 
-    public function __construct(array $decoders = array())
+    public function __construct(array $decoders = [])
     {
         $this->decoders = $decoders;
     }
@@ -35,7 +35,7 @@ class ChainDecoder implements ContextAwareDecoderInterface
     /**
      * {@inheritdoc}
      */
-    final public function decode($data, $format, array $context = array())
+    final public function decode($data, $format, array $context = [])
     {
         return $this->getDecoder($format, $context)->decode($data, $format, $context);
     }
@@ -43,7 +43,7 @@ class ChainDecoder implements ContextAwareDecoderInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsDecoding($format, array $context = array())
+    public function supportsDecoding($format, array $context = [])
     {
         try {
             $this->getDecoder($format, $context);
diff --git a/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php b/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
index 9745587c95..eb1b84ad3c 100644
--- a/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/ChainEncoder.php
@@ -24,10 +24,10 @@ use Symfony\Component\Serializer\Exception\RuntimeException;
  */
 class ChainEncoder implements ContextAwareEncoderInterface
 {
-    protected $encoders = array();
-    protected $encoderByFormat = array();
+    protected $encoders = [];
+    protected $encoderByFormat = [];
 
-    public function __construct(array $encoders = array())
+    public function __construct(array $encoders = [])
     {
         $this->encoders = $encoders;
     }
@@ -35,7 +35,7 @@ class ChainEncoder implements ContextAwareEncoderInterface
     /**
      * {@inheritdoc}
      */
-    final public function encode($data, $format, array $context = array())
+    final public function encode($data, $format, array $context = [])
     {
         return $this->getEncoder($format, $context)->encode($data, $format, $context);
     }
@@ -43,7 +43,7 @@ class ChainEncoder implements ContextAwareEncoderInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsEncoding($format, array $context = array())
+    public function supportsEncoding($format, array $context = [])
     {
         try {
             $this->getEncoder($format, $context);
@@ -62,7 +62,7 @@ class ChainEncoder implements ContextAwareEncoderInterface
      *
      * @return bool
      */
-    public function needsNormalization($format, array $context = array())
+    public function needsNormalization($format, array $context = [])
     {
         $encoder = $this->getEncoder($format, $context);
 
diff --git a/src/Symfony/Component/Serializer/Encoder/ContextAwareDecoderInterface.php b/src/Symfony/Component/Serializer/Encoder/ContextAwareDecoderInterface.php
index eefea0ecae..5ef89d5596 100644
--- a/src/Symfony/Component/Serializer/Encoder/ContextAwareDecoderInterface.php
+++ b/src/Symfony/Component/Serializer/Encoder/ContextAwareDecoderInterface.php
@@ -23,5 +23,5 @@ interface ContextAwareDecoderInterface extends DecoderInterface
      *
      * @param array $context options that decoders have access to
      */
-    public function supportsDecoding($format, array $context = array());
+    public function supportsDecoding($format, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Encoder/ContextAwareEncoderInterface.php b/src/Symfony/Component/Serializer/Encoder/ContextAwareEncoderInterface.php
index 0268df3d8d..a8893a80f9 100644
--- a/src/Symfony/Component/Serializer/Encoder/ContextAwareEncoderInterface.php
+++ b/src/Symfony/Component/Serializer/Encoder/ContextAwareEncoderInterface.php
@@ -23,5 +23,5 @@ interface ContextAwareEncoderInterface extends EncoderInterface
      *
      * @param array $context options that encoders have access to
      */
-    public function supportsEncoding($format, array $context = array());
+    public function supportsEncoding($format, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php b/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php
index 0fa578099f..cfc591e7ad 100644
--- a/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php
+++ b/src/Symfony/Component/Serializer/Encoder/DecoderInterface.php
@@ -36,7 +36,7 @@ interface DecoderInterface
      *
      * @throws UnexpectedValueException
      */
-    public function decode($data, $format, array $context = array());
+    public function decode($data, $format, array $context = []);
 
     /**
      * Checks whether the deserializer can decode from given format.
diff --git a/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php b/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
index 077e4422e4..9b9862e2ac 100644
--- a/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
+++ b/src/Symfony/Component/Serializer/Encoder/EncoderInterface.php
@@ -31,7 +31,7 @@ interface EncoderInterface
      *
      * @throws UnexpectedValueException
      */
-    public function encode($data, $format, array $context = array());
+    public function encode($data, $format, array $context = []);
 
     /**
      * Checks whether the serializer can encode to given format.
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonDecode.php b/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
index 2722974d58..789e166b50 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonDecode.php
@@ -34,26 +34,26 @@ class JsonDecode implements DecoderInterface
      */
     const RECURSION_DEPTH = 'json_decode_recursion_depth';
 
-    private $defaultContext = array(
+    private $defaultContext = [
         self::ASSOCIATIVE => false,
         self::OPTIONS => 0,
         self::RECURSION_DEPTH => 512,
-    );
+    ];
 
     /**
      * Constructs a new JsonDecode instance.
      *
      * @param array $defaultContext
      */
-    public function __construct($defaultContext = array(), int $depth = 512)
+    public function __construct($defaultContext = [], int $depth = 512)
     {
         if (!\is_array($defaultContext)) {
             @trigger_error(sprintf('Using constructor parameters that are not a default context is deprecated since Symfony 4.2, use the "%s" and "%s" keys of the context instead.', self::ASSOCIATIVE, self::RECURSION_DEPTH), E_USER_DEPRECATED);
 
-            $defaultContext = array(
+            $defaultContext = [
                 self::ASSOCIATIVE => (bool) $defaultContext,
                 self::RECURSION_DEPTH => $depth,
-            );
+            ];
         }
 
         $this->defaultContext = array_merge($this->defaultContext, $defaultContext);
@@ -86,7 +86,7 @@ class JsonDecode implements DecoderInterface
      *
      * @see http://php.net/json_decode json_decode
      */
-    public function decode($data, $format, array $context = array())
+    public function decode($data, $format, array $context = [])
     {
         $associative = $context[self::ASSOCIATIVE] ?? $this->defaultContext[self::ASSOCIATIVE];
         $recursionDepth = $context[self::RECURSION_DEPTH] ?? $this->defaultContext[self::RECURSION_DEPTH];
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonEncode.php b/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
index 63669d4ca6..ca9fc9e5d7 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonEncode.php
@@ -22,14 +22,14 @@ class JsonEncode implements EncoderInterface
 {
     const OPTIONS = 'json_encode_options';
 
-    private $defaultContext = array(
+    private $defaultContext = [
         self::OPTIONS => 0,
-    );
+    ];
 
     /**
      * @param array $defaultContext
      */
-    public function __construct($defaultContext = array())
+    public function __construct($defaultContext = [])
     {
         if (!\is_array($defaultContext)) {
             @trigger_error(sprintf('Passing an integer as first parameter of the "%s()" method is deprecated since Symfony 4.2, use the "json_encode_options" key of the context instead.', __METHOD__), E_USER_DEPRECATED);
@@ -45,7 +45,7 @@ class JsonEncode implements EncoderInterface
      *
      * {@inheritdoc}
      */
-    public function encode($data, $format, array $context = array())
+    public function encode($data, $format, array $context = [])
     {
         $jsonEncodeOptions = $context[self::OPTIONS] ?? $this->defaultContext[self::OPTIONS];
         $encodedJson = json_encode($data, $jsonEncodeOptions);
diff --git a/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php b/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
index 4690c9863c..8cb98accdf 100644
--- a/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/JsonEncoder.php
@@ -26,13 +26,13 @@ class JsonEncoder implements EncoderInterface, DecoderInterface
     public function __construct(JsonEncode $encodingImpl = null, JsonDecode $decodingImpl = null)
     {
         $this->encodingImpl = $encodingImpl ?: new JsonEncode();
-        $this->decodingImpl = $decodingImpl ?: new JsonDecode(array(JsonDecode::ASSOCIATIVE => true));
+        $this->decodingImpl = $decodingImpl ?: new JsonDecode([JsonDecode::ASSOCIATIVE => true]);
     }
 
     /**
      * {@inheritdoc}
      */
-    public function encode($data, $format, array $context = array())
+    public function encode($data, $format, array $context = [])
     {
         return $this->encodingImpl->encode($data, self::FORMAT, $context);
     }
@@ -40,7 +40,7 @@ class JsonEncoder implements EncoderInterface, DecoderInterface
     /**
      * {@inheritdoc}
      */
-    public function decode($data, $format, array $context = array())
+    public function decode($data, $format, array $context = [])
     {
         return $this->decodingImpl->decode($data, self::FORMAT, $context);
     }
diff --git a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
index 3632be1f89..9c7c01b42a 100644
--- a/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
@@ -54,15 +54,15 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
     const TYPE_CASE_ATTRIBUTES = 'xml_type_cast_attributes';
     const VERSION = 'xml_version';
 
-    private $defaultContext = array(
+    private $defaultContext = [
         self::AS_COLLECTION => false,
-        self::DECODER_IGNORED_NODE_TYPES => array(XML_PI_NODE, XML_COMMENT_NODE),
-        self::ENCODER_IGNORED_NODE_TYPES => array(),
+        self::DECODER_IGNORED_NODE_TYPES => [XML_PI_NODE, XML_COMMENT_NODE],
+        self::ENCODER_IGNORED_NODE_TYPES => [],
         self::LOAD_OPTIONS => LIBXML_NONET | LIBXML_NOBLANKS,
         self::REMOVE_EMPTY_TAGS => false,
         self::ROOT_NODE_NAME => 'response',
         self::TYPE_CASE_ATTRIBUTES => true,
-    );
+    ];
 
     /**
      * @var \DOMDocument
@@ -74,17 +74,17 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
     /**
      * @param array $defaultContext
      */
-    public function __construct($defaultContext = array(), int $loadOptions = null, array $decoderIgnoredNodeTypes = array(XML_PI_NODE, XML_COMMENT_NODE), array $encoderIgnoredNodeTypes = array())
+    public function __construct($defaultContext = [], int $loadOptions = null, array $decoderIgnoredNodeTypes = [XML_PI_NODE, XML_COMMENT_NODE], array $encoderIgnoredNodeTypes = [])
     {
         if (!\is_array($defaultContext)) {
             @trigger_error('Passing configuration options directly to the constructor is deprecated since Symfony 4.2, use the default context instead.', E_USER_DEPRECATED);
 
-            $defaultContext = array(
+            $defaultContext = [
                 self::DECODER_IGNORED_NODE_TYPES => $decoderIgnoredNodeTypes,
                 self::ENCODER_IGNORED_NODE_TYPES => $encoderIgnoredNodeTypes,
                 self::LOAD_OPTIONS => $loadOptions ?? LIBXML_NONET | LIBXML_NOBLANKS,
                 self::ROOT_NODE_NAME => (string) $defaultContext,
-            );
+            ];
         }
 
         $this->defaultContext = array_merge($this->defaultContext, $defaultContext);
@@ -93,7 +93,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
     /**
      * {@inheritdoc}
      */
-    public function encode($data, $format, array $context = array())
+    public function encode($data, $format, array $context = [])
     {
         $encoderIgnoredNodeTypes = $context[self::ENCODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::ENCODER_IGNORED_NODE_TYPES];
         $ignorePiNode = \in_array(XML_PI_NODE, $encoderIgnoredNodeTypes, true);
@@ -121,7 +121,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
     /**
      * {@inheritdoc}
      */
-    public function decode($data, $format, array $context = array())
+    public function decode($data, $format, array $context = [])
     {
         if ('' === trim($data)) {
             throw new NotEncodableValueException('Invalid XML data, it can not be empty.');
@@ -158,7 +158,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
 
         if ($rootNode->hasChildNodes()) {
             $xpath = new \DOMXPath($dom);
-            $data = array();
+            $data = [];
             foreach ($xpath->query('namespace::*', $dom->documentElement) as $nsNode) {
                 $data['@'.$nsNode->nodeName] = $nsNode->nodeValue;
             }
@@ -176,7 +176,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
             return $rootNode->nodeValue;
         }
 
-        $data = array();
+        $data = [];
 
         foreach ($rootNode->attributes as $attrKey => $attr) {
             $data['@'.$attrKey] = $attr->nodeValue;
@@ -297,7 +297,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
      *
      * @return array|string
      */
-    private function parseXml(\DOMNode $node, array $context = array())
+    private function parseXml(\DOMNode $node, array $context = [])
     {
         $data = $this->parseXmlAttributes($node, $context);
 
@@ -329,13 +329,13 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
     /**
      * Parse the input DOMNode attributes into an array.
      */
-    private function parseXmlAttributes(\DOMNode $node, array $context = array()): array
+    private function parseXmlAttributes(\DOMNode $node, array $context = []): array
     {
         if (!$node->hasAttributes()) {
-            return array();
+            return [];
         }
 
-        $data = array();
+        $data = [];
         $typeCastAttributes = (bool) ($context[self::TYPE_CASE_ATTRIBUTES] ?? $this->defaultContext[self::TYPE_CASE_ATTRIBUTES]);
 
         foreach ($node->attributes as $attr) {
@@ -362,17 +362,17 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
      *
      * @return array|string
      */
-    private function parseXmlValue(\DOMNode $node, array $context = array())
+    private function parseXmlValue(\DOMNode $node, array $context = [])
     {
         if (!$node->hasChildNodes()) {
             return $node->nodeValue;
         }
 
-        if (1 === $node->childNodes->length && \in_array($node->firstChild->nodeType, array(XML_TEXT_NODE, XML_CDATA_SECTION_NODE))) {
+        if (1 === $node->childNodes->length && \in_array($node->firstChild->nodeType, [XML_TEXT_NODE, XML_CDATA_SECTION_NODE])) {
             return $node->firstChild->nodeValue;
         }
 
-        $value = array();
+        $value = [];
         $decoderIgnoredNodeTypes = $context[self::DECODER_IGNORED_NODE_TYPES] ?? $this->defaultContext[self::DECODER_IGNORED_NODE_TYPES];
         foreach ($node->childNodes as $subnode) {
             if (\in_array($subnode->nodeType, $decoderIgnoredNodeTypes, true)) {
@@ -431,7 +431,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
                         /*
                          * Create nodes to append to $parentNode based on the $key of this array
                          * Produces <xml><item>0</item><item>1</item></xml>
-                         * From array("item" => array(0,1));.
+                         * From ["item" => [0,1]];.
                          */
                         foreach ($data as $subData) {
                             $append = $this->appendNode($parentNode, $subData, $key);
@@ -539,7 +539,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
         $document = new \DOMDocument();
 
         // Set an attribute on the DOM document specifying, as part of the XML declaration,
-        $xmlOptions = array(
+        $xmlOptions = [
             // nicely formats output with indentation and extra space
             self::FORMAT_OUTPUT => 'formatOutput',
             // the version number of the document
@@ -548,7 +548,7 @@ class XmlEncoder implements EncoderInterface, DecoderInterface, NormalizationAwa
             self::ENCODING => 'encoding',
             // whether the document is standalone
             self::STANDALONE => 'xmlStandalone',
-        );
+        ];
         foreach ($xmlOptions as $xmlOption => $documentProperty) {
             if ($contextOption = $context[$xmlOption] ?? $this->defaultContext[$xmlOption] ?? false) {
                 $document->$documentProperty = $contextOption;
diff --git a/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php b/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php
index f9920a5fac..dc0bf7fe41 100644
--- a/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php
+++ b/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php
@@ -27,9 +27,9 @@ class YamlEncoder implements EncoderInterface, DecoderInterface
 
     private $dumper;
     private $parser;
-    private $defaultContext = array('yaml_inline' => 0, 'yaml_indent' => 0, 'yaml_flags' => 0);
+    private $defaultContext = ['yaml_inline' => 0, 'yaml_indent' => 0, 'yaml_flags' => 0];
 
-    public function __construct(Dumper $dumper = null, Parser $parser = null, array $defaultContext = array())
+    public function __construct(Dumper $dumper = null, Parser $parser = null, array $defaultContext = [])
     {
         if (!class_exists(Dumper::class)) {
             throw new RuntimeException('The YamlEncoder class requires the "Yaml" component. Install "symfony/yaml" to use it.');
@@ -43,7 +43,7 @@ class YamlEncoder implements EncoderInterface, DecoderInterface
     /**
      * {@inheritdoc}
      */
-    public function encode($data, $format, array $context = array())
+    public function encode($data, $format, array $context = [])
     {
         $context = array_merge($this->defaultContext, $context);
 
@@ -61,7 +61,7 @@ class YamlEncoder implements EncoderInterface, DecoderInterface
     /**
      * {@inheritdoc}
      */
-    public function decode($data, $format, array $context = array())
+    public function decode($data, $format, array $context = [])
     {
         $context = array_merge($this->defaultContext, $context);
 
diff --git a/src/Symfony/Component/Serializer/Mapping/AttributeMetadata.php b/src/Symfony/Component/Serializer/Mapping/AttributeMetadata.php
index 9e8ebc6524..a49051113d 100644
--- a/src/Symfony/Component/Serializer/Mapping/AttributeMetadata.php
+++ b/src/Symfony/Component/Serializer/Mapping/AttributeMetadata.php
@@ -30,7 +30,7 @@ class AttributeMetadata implements AttributeMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getGroups()} instead.
      */
-    public $groups = array();
+    public $groups = [];
 
     /**
      * @var int|null
@@ -140,6 +140,6 @@ class AttributeMetadata implements AttributeMetadataInterface
      */
     public function __sleep()
     {
-        return array('name', 'groups', 'maxDepth', 'serializedName');
+        return ['name', 'groups', 'maxDepth', 'serializedName'];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorFromClassMetadata.php b/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorFromClassMetadata.php
index 6ed1bb8ebe..1178f03cfb 100644
--- a/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorFromClassMetadata.php
+++ b/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorFromClassMetadata.php
@@ -22,7 +22,7 @@ class ClassDiscriminatorFromClassMetadata implements ClassDiscriminatorResolverI
      * @var ClassMetadataFactoryInterface
      */
     private $classMetadataFactory;
-    private $mappingForMappedObjectCache = array();
+    private $mappingForMappedObjectCache = [];
 
     public function __construct(ClassMetadataFactoryInterface $classMetadataFactory)
     {
diff --git a/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorMapping.php b/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorMapping.php
index 65282e6aa0..cadac6e3a0 100644
--- a/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorMapping.php
+++ b/src/Symfony/Component/Serializer/Mapping/ClassDiscriminatorMapping.php
@@ -19,7 +19,7 @@ class ClassDiscriminatorMapping
     private $typeProperty;
     private $typesMapping;
 
-    public function __construct(string $typeProperty, array $typesMapping = array())
+    public function __construct(string $typeProperty, array $typesMapping = [])
     {
         $this->typeProperty = $typeProperty;
         $this->typesMapping = $typesMapping;
diff --git a/src/Symfony/Component/Serializer/Mapping/ClassMetadata.php b/src/Symfony/Component/Serializer/Mapping/ClassMetadata.php
index e1d474504c..6d1d8cf7ab 100644
--- a/src/Symfony/Component/Serializer/Mapping/ClassMetadata.php
+++ b/src/Symfony/Component/Serializer/Mapping/ClassMetadata.php
@@ -32,7 +32,7 @@ class ClassMetadata implements ClassMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getAttributesMetadata()} instead.
      */
-    public $attributesMetadata = array();
+    public $attributesMetadata = [];
 
     /**
      * @var \ReflectionClass
@@ -133,10 +133,10 @@ class ClassMetadata implements ClassMetadataInterface
      */
     public function __sleep()
     {
-        return array(
+        return [
             'name',
             'attributesMetadata',
             'classDiscriminatorMapping',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Mapping/Loader/XmlFileLoader.php b/src/Symfony/Component/Serializer/Mapping/Loader/XmlFileLoader.php
index a28ed2f5ee..1104635626 100644
--- a/src/Symfony/Component/Serializer/Mapping/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Serializer/Mapping/Loader/XmlFileLoader.php
@@ -73,7 +73,7 @@ class XmlFileLoader extends FileLoader
             }
 
             if (isset($xml->{'discriminator-map'})) {
-                $mapping = array();
+                $mapping = [];
                 foreach ($xml->{'discriminator-map'}->mapping as $element) {
                     $elementAttributes = $element->attributes();
                     $mapping[(string) $elementAttributes->type] = (string) $elementAttributes->class;
@@ -128,7 +128,7 @@ class XmlFileLoader extends FileLoader
     private function getClassesFromXml()
     {
         $xml = $this->parseFile($this->file);
-        $classes = array();
+        $classes = [];
 
         foreach ($xml->class as $class) {
             $classes[(string) $class['name']] = $class;
diff --git a/src/Symfony/Component/Serializer/Mapping/Loader/YamlFileLoader.php b/src/Symfony/Component/Serializer/Mapping/Loader/YamlFileLoader.php
index 7aa761485f..d21531b2c7 100644
--- a/src/Symfony/Component/Serializer/Mapping/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Serializer/Mapping/Loader/YamlFileLoader.php
@@ -141,7 +141,7 @@ class YamlFileLoader extends FileLoader
         $classes = $this->yamlParser->parseFile($this->file, Yaml::PARSE_CONSTANT);
 
         if (empty($classes)) {
-            return array();
+            return [];
         }
 
         if (!\is_array($classes)) {
diff --git a/src/Symfony/Component/Serializer/NameConverter/AdvancedNameConverterInterface.php b/src/Symfony/Component/Serializer/NameConverter/AdvancedNameConverterInterface.php
index d0f94fdfc1..03abdf18ba 100644
--- a/src/Symfony/Component/Serializer/NameConverter/AdvancedNameConverterInterface.php
+++ b/src/Symfony/Component/Serializer/NameConverter/AdvancedNameConverterInterface.php
@@ -21,10 +21,10 @@ interface AdvancedNameConverterInterface extends NameConverterInterface
     /**
      * {@inheritdoc}
      */
-    public function normalize($propertyName, string $class = null, string $format = null, array $context = array());
+    public function normalize($propertyName, string $class = null, string $format = null, array $context = []);
 
     /**
      * {@inheritdoc}
      */
-    public function denormalize($propertyName, string $class = null, string $format = null, array $context = array());
+    public function denormalize($propertyName, string $class = null, string $format = null, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/NameConverter/MetadataAwareNameConverter.php b/src/Symfony/Component/Serializer/NameConverter/MetadataAwareNameConverter.php
index 51abde2246..a6934f54b8 100644
--- a/src/Symfony/Component/Serializer/NameConverter/MetadataAwareNameConverter.php
+++ b/src/Symfony/Component/Serializer/NameConverter/MetadataAwareNameConverter.php
@@ -25,11 +25,11 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
      */
     private $fallbackNameConverter;
 
-    private static $normalizeCache = array();
+    private static $normalizeCache = [];
 
-    private static $denormalizeCache = array();
+    private static $denormalizeCache = [];
 
-    private static $attributesMetadataCache = array();
+    private static $attributesMetadataCache = [];
 
     public function __construct(ClassMetadataFactoryInterface $metadataFactory, NameConverterInterface $fallbackNameConverter = null)
     {
@@ -40,7 +40,7 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
     /**
      * {@inheritdoc}
      */
-    public function normalize($propertyName, string $class = null, string $format = null, array $context = array())
+    public function normalize($propertyName, string $class = null, string $format = null, array $context = [])
     {
         if (null === $class) {
             return $this->normalizeFallback($propertyName, $class, $format, $context);
@@ -56,7 +56,7 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
     /**
      * {@inheritdoc}
      */
-    public function denormalize($propertyName, string $class = null, string $format = null, array $context = array())
+    public function denormalize($propertyName, string $class = null, string $format = null, array $context = [])
     {
         if (null === $class) {
             return $this->denormalizeFallback($propertyName, $class, $format, $context);
@@ -83,7 +83,7 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
         return $attributesMetadata[$propertyName]->getSerializedName() ?? null;
     }
 
-    private function normalizeFallback(string $propertyName, string $class = null, string $format = null, array $context = array()): string
+    private function normalizeFallback(string $propertyName, string $class = null, string $format = null, array $context = []): string
     {
         return $this->fallbackNameConverter ? $this->fallbackNameConverter->normalize($propertyName, $class, $format, $context) : $propertyName;
     }
@@ -97,7 +97,7 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
         return self::$attributesMetadataCache[$class][$propertyName] ?? null;
     }
 
-    private function denormalizeFallback(string $propertyName, string $class = null, string $format = null, array $context = array()): string
+    private function denormalizeFallback(string $propertyName, string $class = null, string $format = null, array $context = []): string
     {
         return $this->fallbackNameConverter ? $this->fallbackNameConverter->denormalize($propertyName, $class, $format, $context) : $propertyName;
     }
@@ -105,12 +105,12 @@ final class MetadataAwareNameConverter implements AdvancedNameConverterInterface
     private function getCacheValueForAttributesMetadata(string $class): array
     {
         if (!$this->metadataFactory->hasMetadataFor($class)) {
-            return array();
+            return [];
         }
 
         $classMetadata = $this->metadataFactory->getMetadataFor($class);
 
-        $cache = array();
+        $cache = [];
         foreach ($classMetadata->getAttributesMetadata() as $name => $metadata) {
             if (null === $metadata->getSerializedName()) {
                 continue;
diff --git a/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
index 82d0bbb17f..300c7f1b3c 100644
--- a/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/AbstractNormalizer.php
@@ -47,11 +47,11 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
      */
     const CIRCULAR_REFERENCE_LIMIT_COUNTERS = 'circular_reference_limit_counters';
 
-    protected $defaultContext = array(
+    protected $defaultContext = [
         self::ALLOW_EXTRA_ATTRIBUTES => true,
         self::CIRCULAR_REFERENCE_LIMIT => 1,
-        self::IGNORED_ATTRIBUTES => array(),
-    );
+        self::IGNORED_ATTRIBUTES => [],
+    ];
 
     /**
      * @deprecated since Symfony 4.2
@@ -78,22 +78,22 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
     /**
      * @deprecated since Symfony 4.2
      */
-    protected $callbacks = array();
+    protected $callbacks = [];
 
     /**
      * @deprecated since Symfony 4.2
      */
-    protected $ignoredAttributes = array();
+    protected $ignoredAttributes = [];
 
     /**
      * @deprecated since Symfony 4.2
      */
-    protected $camelizedAttributes = array();
+    protected $camelizedAttributes = [];
 
     /**
      * Sets the {@link ClassMetadataFactoryInterface} to use.
      */
-    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, array $defaultContext = array())
+    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, array $defaultContext = [])
     {
         $this->classMetadataFactory = $classMetadataFactory;
         $this->nameConverter = $nameConverter;
@@ -239,13 +239,13 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
      *
      * @throws CircularReferenceException
      */
-    protected function handleCircularReference($object/*, string $format = null, array $context = array()*/)
+    protected function handleCircularReference($object/*, string $format = null, array $context = []*/)
     {
         if (\func_num_args() < 2 && __CLASS__ !== \get_class($this) && __CLASS__ !== (new \ReflectionMethod($this, __FUNCTION__))->getDeclaringClass()->getName() && !$this instanceof \PHPUnit\Framework\MockObject\MockObject && !$this instanceof \Prophecy\Prophecy\ProphecySubjectInterface) {
-            @trigger_error(sprintf('The "%s()" method will have two new "string $format = null" and "array $context = array()" arguments in version 5.0, not defining it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
+            @trigger_error(sprintf('The "%s()" method will have two new "string $format = null" and "array $context = []" arguments in version 5.0, not defining it is deprecated since Symfony 4.2.', __METHOD__), E_USER_DEPRECATED);
         }
         $format = \func_num_args() > 1 ? func_get_arg(1) : null;
-        $context = \func_num_args() > 2 ? func_get_arg(2) : array();
+        $context = \func_num_args() > 2 ? func_get_arg(2) : [];
 
         $circularReferenceHandler = $context[self::CIRCULAR_REFERENCE_HANDLER] ?? $this->defaultContext[self::CIRCULAR_REFERENCE_HANDLER] ?? $this->circularReferenceHandler;
         if ($circularReferenceHandler) {
@@ -283,7 +283,7 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
             return false;
         }
 
-        $allowedAttributes = array();
+        $allowedAttributes = [];
         foreach ($this->classMetadataFactory->getMetadataFor($classOrObject)->getAttributesMetadata() as $attributeMetadata) {
             $name = $attributeMetadata->getName();
 
@@ -308,7 +308,7 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
      *
      * @return bool
      */
-    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
+    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = [])
     {
         $ignoredAttributes = $context[self::IGNORED_ATTRIBUTES] ?? $this->defaultContext[self::IGNORED_ATTRIBUTES] ?? $this->ignoredAttributes;
         if (\in_array($attribute, $ignoredAttributes)) {
@@ -390,7 +390,7 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
         if ($constructor) {
             $constructorParameters = $constructor->getParameters();
 
-            $params = array();
+            $params = [];
             foreach ($constructorParameters as $constructorParameter) {
                 $paramName = $constructorParameter->name;
                 $key = $this->nameConverter ? $this->nameConverter->normalize($paramName, $class, $format, $context) : $paramName;
@@ -417,9 +417,9 @@ abstract class AbstractNormalizer implements NormalizerInterface, DenormalizerIn
                     // Don't run set for a parameter passed to the constructor
                     $params[] = $this->denormalizeParameter($reflectionClass, $constructorParameter, $paramName, $parameterData, $context, $format);
                     unset($data[$key]);
-                } elseif (array_key_exists($key, $context[static::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class] ?? array())) {
+                } elseif (array_key_exists($key, $context[static::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class] ?? [])) {
                     $params[] = $context[static::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class][$key];
-                } elseif (array_key_exists($key, $this->defaultContext[self::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class] ?? array())) {
+                } elseif (array_key_exists($key, $this->defaultContext[self::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class] ?? [])) {
                     $params[] = $this->defaultContext[self::DEFAULT_CONSTRUCTOR_ARGUMENTS][$class][$key];
                 } elseif ($constructorParameter->isDefaultValueAvailable()) {
                     $params[] = $constructorParameter->getDefaultValue();
diff --git a/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
index 8e8edde937..b17d1e8c59 100644
--- a/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
@@ -40,8 +40,8 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
     const EXCLUDE_FROM_CACHE_KEY = 'exclude_from_cache_key';
 
     private $propertyTypeExtractor;
-    private $typesCache = array();
-    private $attributesCache = array();
+    private $typesCache = [];
+    private $attributesCache = [];
 
     /**
      * @deprecated since Symfony 4.2
@@ -56,10 +56,10 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
      */
     protected $classDiscriminatorResolver;
 
-    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, PropertyTypeExtractorInterface $propertyTypeExtractor = null, ClassDiscriminatorResolverInterface $classDiscriminatorResolver = null, callable $objectClassResolver = null, array $defaultContext = array())
+    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, PropertyTypeExtractorInterface $propertyTypeExtractor = null, ClassDiscriminatorResolverInterface $classDiscriminatorResolver = null, callable $objectClassResolver = null, array $defaultContext = [])
     {
         parent::__construct($classMetadataFactory, $nameConverter, $defaultContext);
-        $this->defaultContext[self::EXCLUDE_FROM_CACHE_KEY] = array(self::CIRCULAR_REFERENCE_LIMIT_COUNTERS);
+        $this->defaultContext[self::EXCLUDE_FROM_CACHE_KEY] = [self::CIRCULAR_REFERENCE_LIMIT_COUNTERS];
 
         $this->propertyTypeExtractor = $propertyTypeExtractor;
 
@@ -81,7 +81,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         if (!isset($context['cache_key'])) {
             $context['cache_key'] = $this->getCacheKey($format, $context);
@@ -91,8 +91,8 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
             return $this->handleCircularReference($object, $format, $context);
         }
 
-        $data = array();
-        $stack = array();
+        $data = [];
+        $stack = [];
         $attributes = $this->getAttributes($object, $format, $context);
         $class = $this->objectClassResolver ? ($this->objectClassResolver)($object) : \get_class($object);
         $attributesMetadata = $this->classMetadataFactory ? $this->classMetadataFactory->getMetadataFor($class)->getAttributesMetadata() : null;
@@ -110,7 +110,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
             }
 
             /**
-             * @var $callback callable|null
+             * @var callable|null
              */
             $callback = $context[self::CALLBACKS][$attribute] ?? $this->defaultContext[self::CALLBACKS][$attribute] ?? $this->callbacks[$attribute] ?? null;
             if ($callback) {
@@ -211,7 +211,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
      *
      * @return string[]
      */
-    abstract protected function extractAttributes($object, $format = null, array $context = array());
+    abstract protected function extractAttributes($object, $format = null, array $context = []);
 
     /**
      * Gets the attribute value.
@@ -223,7 +223,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
      *
      * @return mixed
      */
-    abstract protected function getAttributeValue($object, $attribute, $format = null, array $context = array());
+    abstract protected function getAttributeValue($object, $attribute, $format = null, array $context = []);
 
     /**
      * Sets a handler function that will be called when the max depth is reached.
@@ -248,7 +248,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         if (!isset($context['cache_key'])) {
             $context['cache_key'] = $this->getCacheKey($format, $context);
@@ -256,7 +256,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
 
         $allowedAttributes = $this->getAllowedAttributes($class, $context, true);
         $normalizedData = $this->prepareForDenormalization($data);
-        $extraAttributes = array();
+        $extraAttributes = [];
 
         $reflectionClass = new \ReflectionClass($class);
         $object = $this->instantiateObject($normalizedData, $class, $context, $reflectionClass, $allowedAttributes, $format);
@@ -298,7 +298,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
      * @param string|null $format
      * @param array       $context
      */
-    abstract protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array());
+    abstract protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = []);
 
     /**
      * Validates the submitted data and denormalizes it.
@@ -316,7 +316,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
             return $data;
         }
 
-        $expectedTypes = array();
+        $expectedTypes = [];
         foreach ($types as $type) {
             if (null === $data && $type->isNullable()) {
                 return;
@@ -329,7 +329,7 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
                 // Fix a collection that contains the only one element
                 // This is special to xml format only
                 if ('xml' === $format && !\is_int(key($data))) {
-                    $data = array($data);
+                    $data = [$data];
                 }
 
                 if (null !== $collectionKeyType = $type->getCollectionKeyType()) {
@@ -407,9 +407,9 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
 
         if (null !== $this->classDiscriminatorResolver && null !== $discriminatorMapping = $this->classDiscriminatorResolver->getMappingForClass($currentClass)) {
             if ($discriminatorMapping->getTypeProperty() === $attribute) {
-                return $this->typesCache[$key] = array(
+                return $this->typesCache[$key] = [
                     new Type(Type::BUILTIN_TYPE_STRING),
-                );
+                ];
             }
 
             foreach ($discriminatorMapping->getTypesMapping() as $mappedClass) {
diff --git a/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php b/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
index 70a8470891..c77e565b95 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ArrayDenormalizer.php
@@ -36,7 +36,7 @@ class ArrayDenormalizer implements ContextAwareDenormalizerInterface, Serializer
      *
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         if (null === $this->serializer) {
             throw new BadMethodCallException('Please set a serializer before calling denormalize()!');
@@ -66,7 +66,7 @@ class ArrayDenormalizer implements ContextAwareDenormalizerInterface, Serializer
     /**
      * {@inheritdoc}
      */
-    public function supportsDenormalization($data, $type, $format = null, array $context = array())
+    public function supportsDenormalization($data, $type, $format = null, array $context = [])
     {
         return '[]' === substr($type, -2)
             && $this->serializer->supportsDenormalization($data, substr($type, 0, -2), $format, $context);
diff --git a/src/Symfony/Component/Serializer/Normalizer/ConstraintViolationListNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/ConstraintViolationListNormalizer.php
index dc24f6ec16..aa45a0fc1b 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ConstraintViolationListNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ConstraintViolationListNormalizer.php
@@ -31,7 +31,7 @@ class ConstraintViolationListNormalizer implements NormalizerInterface, Cacheabl
 
     private $defaultContext;
 
-    public function __construct($defaultContext = array())
+    public function __construct($defaultContext = [])
     {
         $this->defaultContext = $defaultContext;
     }
@@ -39,17 +39,17 @@ class ConstraintViolationListNormalizer implements NormalizerInterface, Cacheabl
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
-        $violations = array();
-        $messages = array();
+        $violations = [];
+        $messages = [];
         foreach ($object as $violation) {
             $propertyPath = $violation->getPropertyPath();
 
-            $violationEntry = array(
+            $violationEntry = [
                 'propertyPath' => $propertyPath,
                 'title' => $violation->getMessage(),
-            );
+            ];
             if (null !== $code = $violation->getCode()) {
                 $violationEntry['type'] = sprintf('urn:uuid:%s', $code);
             }
@@ -60,10 +60,10 @@ class ConstraintViolationListNormalizer implements NormalizerInterface, Cacheabl
             $messages[] = $prefix.$violation->getMessage();
         }
 
-        $result = array(
+        $result = [
             'type' => $context[self::TYPE] ?? $this->defaultContext[self::TYPE] ?? 'https://symfony.com/errors/validation',
             'title' => $context[self::TITLE] ?? $this->defaultContext[self::TITLE] ?? 'Validation Failed',
-        );
+        ];
         if (null !== $status = ($context[self::STATUS] ?? $this->defaultContext[self::STATUS] ?? null)) {
             $result['status'] = $status;
         }
@@ -74,7 +74,7 @@ class ConstraintViolationListNormalizer implements NormalizerInterface, Cacheabl
             $result['instance'] = $instance;
         }
 
-        return $result + array('violations' => $violations);
+        return $result + ['violations' => $violations];
     }
 
     /**
diff --git a/src/Symfony/Component/Serializer/Normalizer/ContextAwareDenormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/ContextAwareDenormalizerInterface.php
index f0bb48c5c6..4e68dae1ee 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ContextAwareDenormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ContextAwareDenormalizerInterface.php
@@ -23,5 +23,5 @@ interface ContextAwareDenormalizerInterface extends DenormalizerInterface
      *
      * @param array $context options that denormalizers have access to
      */
-    public function supportsDenormalization($data, $type, $format = null, array $context = array());
+    public function supportsDenormalization($data, $type, $format = null, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Normalizer/ContextAwareNormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/ContextAwareNormalizerInterface.php
index b6ab05b713..c278b7ded9 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ContextAwareNormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ContextAwareNormalizerInterface.php
@@ -23,5 +23,5 @@ interface ContextAwareNormalizerInterface extends NormalizerInterface
      *
      * @param array $context options that normalizers have access to
      */
-    public function supportsNormalization($data, $format = null, array $context = array());
+    public function supportsNormalization($data, $format = null, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Normalizer/CustomNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/CustomNormalizer.php
index 695318a5bc..d5a1990f0b 100644
--- a/src/Symfony/Component/Serializer/Normalizer/CustomNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/CustomNormalizer.php
@@ -25,7 +25,7 @@ class CustomNormalizer implements NormalizerInterface, DenormalizerInterface, Se
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         return $object->normalize($this->serializer, $format, $context);
     }
@@ -33,7 +33,7 @@ class CustomNormalizer implements NormalizerInterface, DenormalizerInterface, Se
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         $object = $this->extractObjectToPopulate($class, $context) ?: new $class();
         $object->denormalize($this->serializer, $data, $format, $context);
diff --git a/src/Symfony/Component/Serializer/Normalizer/DataUriNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/DataUriNormalizer.php
index 82b5c8bdde..9327b7980f 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DataUriNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DataUriNormalizer.php
@@ -25,11 +25,11 @@ use Symfony\Component\Serializer\Exception\NotNormalizableValueException;
  */
 class DataUriNormalizer implements NormalizerInterface, DenormalizerInterface, CacheableSupportsMethodInterface
 {
-    private static $supportedTypes = array(
+    private static $supportedTypes = [
         \SplFileInfo::class => true,
         \SplFileObject::class => true,
         File::class => true,
-    );
+    ];
 
     /**
      * @var MimeTypeGuesserInterface
@@ -48,7 +48,7 @@ class DataUriNormalizer implements NormalizerInterface, DenormalizerInterface, C
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         if (!$object instanceof \SplFileInfo) {
             throw new InvalidArgumentException('The object must be an instance of "\SplFileInfo".');
@@ -89,7 +89,7 @@ class DataUriNormalizer implements NormalizerInterface, DenormalizerInterface, C
      * @throws InvalidArgumentException
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         if (!preg_match('/^data:([a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}\/[a-z0-9][a-z0-9\!\#\$\&\-\^\_\+\.]{0,126}(;[a-z0-9\-]+\=[a-z0-9\-]+)?)?(;base64)?,[a-z0-9\!\$\&\\\'\,\(\)\*\+\,\;\=\-\.\_\~\:\@\/\?\%\s]*\s*$/i', $data)) {
             throw new NotNormalizableValueException('The provided "data:" URI is not valid.');
diff --git a/src/Symfony/Component/Serializer/Normalizer/DateIntervalNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/DateIntervalNormalizer.php
index 9a050ae003..0b2d4214bf 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DateIntervalNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DateIntervalNormalizer.php
@@ -24,19 +24,19 @@ class DateIntervalNormalizer implements NormalizerInterface, DenormalizerInterfa
 {
     const FORMAT_KEY = 'dateinterval_format';
 
-    private $defaultContext = array(
+    private $defaultContext = [
         self::FORMAT_KEY => 'P%yY%mM%dDT%hH%iM%sS',
-    );
+    ];
 
     /**
      * @param array $defaultContext
      */
-    public function __construct($defaultContext = array())
+    public function __construct($defaultContext = [])
     {
         if (!\is_array($defaultContext)) {
             @trigger_error(sprintf('The "format" parameter is deprecated since Symfony 4.2, use the "%s" key of the context instead.', self::FORMAT_KEY), E_USER_DEPRECATED);
 
-            $defaultContext = array(self::FORMAT_KEY => (string) $defaultContext);
+            $defaultContext = [self::FORMAT_KEY => (string) $defaultContext];
         }
 
         $this->defaultContext = array_merge($this->defaultContext, $defaultContext);
@@ -47,7 +47,7 @@ class DateIntervalNormalizer implements NormalizerInterface, DenormalizerInterfa
      *
      * @throws InvalidArgumentException
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         if (!$object instanceof \DateInterval) {
             throw new InvalidArgumentException('The object must be an instance of "\DateInterval".');
@@ -78,7 +78,7 @@ class DateIntervalNormalizer implements NormalizerInterface, DenormalizerInterfa
      * @throws InvalidArgumentException
      * @throws UnexpectedValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         if (!\is_string($data)) {
             throw new InvalidArgumentException(sprintf('Data expected to be a string, %s given.', \gettype($data)));
diff --git a/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
index 02ae517f25..d3de806e18 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DateTimeNormalizer.php
@@ -27,26 +27,26 @@ class DateTimeNormalizer implements NormalizerInterface, DenormalizerInterface,
 
     private $defaultContext;
 
-    private static $supportedTypes = array(
+    private static $supportedTypes = [
         \DateTimeInterface::class => true,
         \DateTimeImmutable::class => true,
         \DateTime::class => true,
-    );
+    ];
 
     /**
      * @param array $defaultContext
      */
-    public function __construct($defaultContext = array(), \DateTimeZone $timezone = null)
+    public function __construct($defaultContext = [], \DateTimeZone $timezone = null)
     {
-        $this->defaultContext = array(
+        $this->defaultContext = [
             self::FORMAT_KEY => \DateTime::RFC3339,
             self::TIMEZONE_KEY => null,
-        );
+        ];
 
         if (!\is_array($defaultContext)) {
             @trigger_error('Passing configuration options directly to the constructor is deprecated since Symfony 4.2, use the default context instead.', E_USER_DEPRECATED);
 
-            $defaultContext = array(self::FORMAT_KEY => (string) $defaultContext);
+            $defaultContext = [self::FORMAT_KEY => (string) $defaultContext];
             $defaultContext[self::TIMEZONE_KEY] = $timezone;
         }
 
@@ -58,7 +58,7 @@ class DateTimeNormalizer implements NormalizerInterface, DenormalizerInterface,
      *
      * @throws InvalidArgumentException
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         if (!$object instanceof \DateTimeInterface) {
             throw new InvalidArgumentException('The object must implement the "\DateTimeInterface".');
@@ -88,7 +88,7 @@ class DateTimeNormalizer implements NormalizerInterface, DenormalizerInterface,
      *
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         $dateTimeFormat = $context[self::FORMAT_KEY] ?? null;
         $timezone = $this->getTimezone($context);
@@ -145,7 +145,7 @@ class DateTimeNormalizer implements NormalizerInterface, DenormalizerInterface,
      */
     private function formatDateTimeErrors(array $errors)
     {
-        $formattedErrors = array();
+        $formattedErrors = [];
 
         foreach ($errors as $pos => $message) {
             $formattedErrors[] = sprintf('at position %d: %s', $pos, $message);
diff --git a/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php b/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
index 5db15418b5..31e27a85cb 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DenormalizableInterface.php
@@ -36,5 +36,5 @@ interface DenormalizableInterface
      *
      * @return object
      */
-    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array());
+    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
index c3a2bb5356..54e41431e0 100644
--- a/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/DenormalizerInterface.php
@@ -42,7 +42,7 @@ interface DenormalizerInterface
      * @throws LogicException           Occurs when the normalizer is not supposed to denormalize
      * @throws RuntimeException         Occurs if the class cannot be instantiated
      */
-    public function denormalize($data, $class, $format = null, array $context = array());
+    public function denormalize($data, $class, $format = null, array $context = []);
 
     /**
      * Checks whether the given class is supported for denormalization by this normalizer.
diff --git a/src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php
index 0bf719771a..07c5671752 100644
--- a/src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/GetSetMethodNormalizer.php
@@ -34,7 +34,7 @@ namespace Symfony\Component\Serializer\Normalizer;
  */
 class GetSetMethodNormalizer extends AbstractObjectNormalizer
 {
-    private static $setterAccessibleCache = array();
+    private static $setterAccessibleCache = [];
 
     /**
      * {@inheritdoc}
@@ -97,12 +97,12 @@ class GetSetMethodNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
         $reflectionObject = new \ReflectionObject($object);
         $reflectionMethods = $reflectionObject->getMethods(\ReflectionMethod::IS_PUBLIC);
 
-        $attributes = array();
+        $attributes = [];
         foreach ($reflectionMethods as $method) {
             if (!$this->isGetMethod($method)) {
                 continue;
@@ -121,22 +121,22 @@ class GetSetMethodNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
         $ucfirsted = ucfirst($attribute);
 
         $getter = 'get'.$ucfirsted;
-        if (\is_callable(array($object, $getter))) {
+        if (\is_callable([$object, $getter])) {
             return $object->$getter();
         }
 
         $isser = 'is'.$ucfirsted;
-        if (\is_callable(array($object, $isser))) {
+        if (\is_callable([$object, $isser])) {
             return $object->$isser();
         }
 
         $haser = 'has'.$ucfirsted;
-        if (\is_callable(array($object, $haser))) {
+        if (\is_callable([$object, $haser])) {
             return $object->$haser();
         }
     }
@@ -144,13 +144,13 @@ class GetSetMethodNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         $setter = 'set'.ucfirst($attribute);
         $key = \get_class($object).':'.$setter;
 
         if (!isset(self::$setterAccessibleCache[$key])) {
-            self::$setterAccessibleCache[$key] = \is_callable(array($object, $setter)) && !(new \ReflectionMethod($object, $setter))->isStatic();
+            self::$setterAccessibleCache[$key] = \is_callable([$object, $setter]) && !(new \ReflectionMethod($object, $setter))->isStatic();
         }
 
         if (self::$setterAccessibleCache[$key]) {
diff --git a/src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php
index 15d0da1aad..6238f5e534 100644
--- a/src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/JsonSerializableNormalizer.php
@@ -24,7 +24,7 @@ class JsonSerializableNormalizer extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
         if ($this->isCircularReference($object, $context)) {
             return $this->handleCircularReference($object);
@@ -60,7 +60,7 @@ class JsonSerializableNormalizer extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         throw new LogicException(sprintf('Cannot denormalize with "%s".', \JsonSerializable::class));
     }
diff --git a/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php b/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
index 8542e4f80e..f7a5560143 100644
--- a/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/NormalizableInterface.php
@@ -35,5 +35,5 @@ interface NormalizableInterface
      *
      * @return array|string|int|float|bool
      */
-    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = array());
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php b/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
index 5cccdb3360..09aca60ff2 100644
--- a/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
+++ b/src/Symfony/Component/Serializer/Normalizer/NormalizerInterface.php
@@ -36,7 +36,7 @@ interface NormalizerInterface
      *                                    reference handler can fix it
      * @throws LogicException             Occurs when the normalizer is not called in an expected context
      */
-    public function normalize($object, $format = null, array $context = array());
+    public function normalize($object, $format = null, array $context = []);
 
     /**
      * Checks whether the given class is supported for normalization by this normalizer.
diff --git a/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
index 6d8a9ff51e..530f168c6a 100644
--- a/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/ObjectNormalizer.php
@@ -30,9 +30,9 @@ class ObjectNormalizer extends AbstractObjectNormalizer
 {
     protected $propertyAccessor;
 
-    private $discriminatorCache = array();
+    private $discriminatorCache = [];
 
-    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, PropertyAccessorInterface $propertyAccessor = null, PropertyTypeExtractorInterface $propertyTypeExtractor = null, ClassDiscriminatorResolverInterface $classDiscriminatorResolver = null, callable $objectClassResolver = null, array $defaultContext = array())
+    public function __construct(ClassMetadataFactoryInterface $classMetadataFactory = null, NameConverterInterface $nameConverter = null, PropertyAccessorInterface $propertyAccessor = null, PropertyTypeExtractorInterface $propertyTypeExtractor = null, ClassDiscriminatorResolverInterface $classDiscriminatorResolver = null, callable $objectClassResolver = null, array $defaultContext = [])
     {
         if (!\class_exists(PropertyAccess::class)) {
             throw new LogicException('The ObjectNormalizer class requires the "PropertyAccess" component. Install "symfony/property-access" to use it.');
@@ -54,10 +54,10 @@ class ObjectNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
         // If not using groups, detect manually
-        $attributes = array();
+        $attributes = [];
 
         // methods
         $reflClass = new \ReflectionClass($object);
@@ -110,7 +110,7 @@ class ObjectNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
         $cacheKey = \get_class($object);
         if (!array_key_exists($cacheKey, $this->discriminatorCache)) {
@@ -127,7 +127,7 @@ class ObjectNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         try {
             $this->propertyAccessor->setValue($object, $attribute, $value);
diff --git a/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php
index a2207c636f..ee85552c65 100644
--- a/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/PropertyNormalizer.php
@@ -76,7 +76,7 @@ class PropertyNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
+    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = [])
     {
         if (!parent::isAllowedAttribute($classOrObject, $attribute, $format, $context)) {
             return false;
@@ -97,10 +97,10 @@ class PropertyNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
         $reflectionObject = new \ReflectionObject($object);
-        $attributes = array();
+        $attributes = [];
 
         do {
             foreach ($reflectionObject->getProperties() as $property) {
@@ -118,7 +118,7 @@ class PropertyNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
         try {
             $reflectionProperty = $this->getReflectionProperty($object, $attribute);
@@ -137,7 +137,7 @@ class PropertyNormalizer extends AbstractObjectNormalizer
     /**
      * {@inheritdoc}
      */
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         try {
             $reflectionProperty = $this->getReflectionProperty($object, $attribute);
diff --git a/src/Symfony/Component/Serializer/Serializer.php b/src/Symfony/Component/Serializer/Serializer.php
index f7daa6f73f..3aefec553e 100644
--- a/src/Symfony/Component/Serializer/Serializer.php
+++ b/src/Symfony/Component/Serializer/Serializer.php
@@ -58,17 +58,17 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * @internal since Symfony 4.1
      */
-    protected $normalizers = array();
+    protected $normalizers = [];
 
     private $cachedNormalizers;
-    private $denormalizerCache = array();
-    private $normalizerCache = array();
+    private $denormalizerCache = [];
+    private $normalizerCache = [];
 
     /**
      * @param (NormalizerInterface|DenormalizerInterface)[] $normalizers
      * @param (EncoderInterface|DecoderInterface)[]         $encoders
      */
-    public function __construct(array $normalizers = array(), array $encoders = array())
+    public function __construct(array $normalizers = [], array $encoders = [])
     {
         foreach ($normalizers as $normalizer) {
             if ($normalizer instanceof SerializerAwareInterface) {
@@ -90,8 +90,8 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
         }
         $this->normalizers = $normalizers;
 
-        $decoders = array();
-        $realEncoders = array();
+        $decoders = [];
+        $realEncoders = [];
         foreach ($encoders as $encoder) {
             if ($encoder instanceof SerializerAwareInterface) {
                 $encoder->setSerializer($this);
@@ -115,7 +115,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    final public function serialize($data, $format, array $context = array())
+    final public function serialize($data, $format, array $context = [])
     {
         if (!$this->supportsEncoding($format, $context)) {
             throw new NotEncodableValueException(sprintf('Serialization for the format %s is not supported', $format));
@@ -131,7 +131,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    final public function deserialize($data, $type, $format, array $context = array())
+    final public function deserialize($data, $type, $format, array $context = [])
     {
         if (!$this->supportsDecoding($format, $context)) {
             throw new NotEncodableValueException(sprintf('Deserialization for the format %s is not supported', $format));
@@ -145,7 +145,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function normalize($data, $format = null, array $context = array())
+    public function normalize($data, $format = null, array $context = [])
     {
         // If a normalizer supports the given data, use it
         if ($normalizer = $this->getNormalizer($data, $format, $context)) {
@@ -157,7 +157,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
         }
 
         if (\is_array($data) || $data instanceof \Traversable) {
-            $normalized = array();
+            $normalized = [];
             foreach ($data as $key => $val) {
                 $normalized[$key] = $this->normalize($val, $format, $context);
             }
@@ -181,7 +181,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
      *
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, $type, $format = null, array $context = array())
+    public function denormalize($data, $type, $format = null, array $context = [])
     {
         if (!$this->normalizers) {
             throw new LogicException('You must register at least one normalizer to be able to denormalize objects.');
@@ -197,7 +197,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsNormalization($data, $format = null, array $context = array())
+    public function supportsNormalization($data, $format = null, array $context = [])
     {
         return null !== $this->getNormalizer($data, $format, $context);
     }
@@ -205,7 +205,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsDenormalization($data, $type, $format = null, array $context = array())
+    public function supportsDenormalization($data, $type, $format = null, array $context = [])
     {
         return null !== $this->getDenormalizer($data, $type, $format, $context);
     }
@@ -223,12 +223,12 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     {
         if ($this->cachedNormalizers !== $this->normalizers) {
             $this->cachedNormalizers = $this->normalizers;
-            $this->denormalizerCache = $this->normalizerCache = array();
+            $this->denormalizerCache = $this->normalizerCache = [];
         }
         $type = \is_object($data) ? \get_class($data) : 'native-'.\gettype($data);
 
         if (!isset($this->normalizerCache[$format][$type])) {
-            $this->normalizerCache[$format][$type] = array();
+            $this->normalizerCache[$format][$type] = [];
 
             foreach ($this->normalizers as $k => $normalizer) {
                 if (!$normalizer instanceof NormalizerInterface) {
@@ -266,10 +266,10 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     {
         if ($this->cachedNormalizers !== $this->normalizers) {
             $this->cachedNormalizers = $this->normalizers;
-            $this->denormalizerCache = $this->normalizerCache = array();
+            $this->denormalizerCache = $this->normalizerCache = [];
         }
         if (!isset($this->denormalizerCache[$format][$class])) {
-            $this->denormalizerCache[$format][$class] = array();
+            $this->denormalizerCache[$format][$class] = [];
 
             foreach ($this->normalizers as $k => $normalizer) {
                 if (!$normalizer instanceof DenormalizerInterface) {
@@ -296,7 +296,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    final public function encode($data, $format, array $context = array())
+    final public function encode($data, $format, array $context = [])
     {
         return $this->encoder->encode($data, $format, $context);
     }
@@ -304,7 +304,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    final public function decode($data, $format, array $context = array())
+    final public function decode($data, $format, array $context = [])
     {
         return $this->decoder->decode($data, $format, $context);
     }
@@ -312,7 +312,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsEncoding($format, array $context = array())
+    public function supportsEncoding($format, array $context = [])
     {
         return $this->encoder->supportsEncoding($format, $context);
     }
@@ -320,7 +320,7 @@ class Serializer implements SerializerInterface, ContextAwareNormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function supportsDecoding($format, array $context = array())
+    public function supportsDecoding($format, array $context = [])
     {
         return $this->decoder->supportsDecoding($format, $context);
     }
diff --git a/src/Symfony/Component/Serializer/SerializerInterface.php b/src/Symfony/Component/Serializer/SerializerInterface.php
index 196bff1a21..7a03ef943a 100644
--- a/src/Symfony/Component/Serializer/SerializerInterface.php
+++ b/src/Symfony/Component/Serializer/SerializerInterface.php
@@ -27,7 +27,7 @@ interface SerializerInterface
      *
      * @return string
      */
-    public function serialize($data, $format, array $context = array());
+    public function serialize($data, $format, array $context = []);
 
     /**
      * Deserializes data into the given type.
@@ -39,5 +39,5 @@ interface SerializerInterface
      *
      * @return object
      */
-    public function deserialize($data, $type, $format, array $context = array());
+    public function deserialize($data, $type, $format, array $context = []);
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Annotation/DiscriminatorMapTest.php b/src/Symfony/Component/Serializer/Tests/Annotation/DiscriminatorMapTest.php
index df2f111fa3..3f3f166636 100644
--- a/src/Symfony/Component/Serializer/Tests/Annotation/DiscriminatorMapTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Annotation/DiscriminatorMapTest.php
@@ -21,16 +21,16 @@ class DiscriminatorMapTest extends TestCase
 {
     public function testGetTypePropertyAndMapping()
     {
-        $annotation = new DiscriminatorMap(array('typeProperty' => 'type', 'mapping' => array(
+        $annotation = new DiscriminatorMap(['typeProperty' => 'type', 'mapping' => [
             'foo' => 'FooClass',
             'bar' => 'BarClass',
-        )));
+        ]]);
 
         $this->assertEquals('type', $annotation->getTypeProperty());
-        $this->assertEquals(array(
+        $this->assertEquals([
             'foo' => 'FooClass',
             'bar' => 'BarClass',
-        ), $annotation->getMapping());
+        ], $annotation->getMapping());
     }
 
     /**
@@ -38,7 +38,7 @@ class DiscriminatorMapTest extends TestCase
      */
     public function testExceptionWithoutTypeProperty()
     {
-        new DiscriminatorMap(array('mapping' => array('foo' => 'FooClass')));
+        new DiscriminatorMap(['mapping' => ['foo' => 'FooClass']]);
     }
 
     /**
@@ -46,7 +46,7 @@ class DiscriminatorMapTest extends TestCase
      */
     public function testExceptionWithEmptyTypeProperty()
     {
-        new DiscriminatorMap(array('typeProperty' => '', 'mapping' => array('foo' => 'FooClass')));
+        new DiscriminatorMap(['typeProperty' => '', 'mapping' => ['foo' => 'FooClass']]);
     }
 
     /**
@@ -54,7 +54,7 @@ class DiscriminatorMapTest extends TestCase
      */
     public function testExceptionWithoutMappingProperty()
     {
-        new DiscriminatorMap(array('typeProperty' => 'type'));
+        new DiscriminatorMap(['typeProperty' => 'type']);
     }
 
     /**
@@ -62,6 +62,6 @@ class DiscriminatorMapTest extends TestCase
      */
     public function testExceptionWitEmptyMappingProperty()
     {
-        new DiscriminatorMap(array('typeProperty' => 'type', 'mapping' => array()));
+        new DiscriminatorMap(['typeProperty' => 'type', 'mapping' => []]);
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php b/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
index 04729ccbb9..9b54221d76 100644
--- a/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Annotation/GroupsTest.php
@@ -24,7 +24,7 @@ class GroupsTest extends TestCase
      */
     public function testEmptyGroupsParameter()
     {
-        new Groups(array('value' => array()));
+        new Groups(['value' => []]);
     }
 
     /**
@@ -32,7 +32,7 @@ class GroupsTest extends TestCase
      */
     public function testNotAnArrayGroupsParameter()
     {
-        new Groups(array('value' => 12));
+        new Groups(['value' => 12]);
     }
 
     /**
@@ -40,20 +40,20 @@ class GroupsTest extends TestCase
      */
     public function testInvalidGroupsParameter()
     {
-        new Groups(array('value' => array('a', 1, new \stdClass())));
+        new Groups(['value' => ['a', 1, new \stdClass()]]);
     }
 
     public function testGroupsParameters()
     {
-        $validData = array('a', 'b');
+        $validData = ['a', 'b'];
 
-        $groups = new Groups(array('value' => $validData));
+        $groups = new Groups(['value' => $validData]);
         $this->assertEquals($validData, $groups->getGroups());
     }
 
     public function testSingleGroup()
     {
-        $groups = new Groups(array('value' => 'a'));
-        $this->assertEquals(array('a'), $groups->getGroups());
+        $groups = new Groups(['value' => 'a']);
+        $this->assertEquals(['a'], $groups->getGroups());
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Annotation/MaxDepthTest.php b/src/Symfony/Component/Serializer/Tests/Annotation/MaxDepthTest.php
index 4554fc9905..16f10e1434 100644
--- a/src/Symfony/Component/Serializer/Tests/Annotation/MaxDepthTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Annotation/MaxDepthTest.php
@@ -25,17 +25,17 @@ class MaxDepthTest extends TestCase
      */
     public function testNotSetMaxDepthParameter()
     {
-        new MaxDepth(array());
+        new MaxDepth([]);
     }
 
     public function provideInvalidValues()
     {
-        return array(
-            array(''),
-            array('foo'),
-            array('1'),
-            array(0),
-        );
+        return [
+            [''],
+            ['foo'],
+            ['1'],
+            [0],
+        ];
     }
 
     /**
@@ -46,12 +46,12 @@ class MaxDepthTest extends TestCase
      */
     public function testNotAnIntMaxDepthParameter($value)
     {
-        new MaxDepth(array('value' => $value));
+        new MaxDepth(['value' => $value]);
     }
 
     public function testMaxDepthParameters()
     {
-        $maxDepth = new MaxDepth(array('value' => 3));
+        $maxDepth = new MaxDepth(['value' => 3]);
         $this->assertEquals(3, $maxDepth->getMaxDepth());
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Annotation/SerializedNameTest.php b/src/Symfony/Component/Serializer/Tests/Annotation/SerializedNameTest.php
index 45a18db69b..1b6f4ff9f0 100644
--- a/src/Symfony/Component/Serializer/Tests/Annotation/SerializedNameTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Annotation/SerializedNameTest.php
@@ -25,15 +25,15 @@ class SerializedNameTest extends TestCase
      */
     public function testNotSetSerializedNameParameter()
     {
-        new SerializedName(array());
+        new SerializedName([]);
     }
 
     public function provideInvalidValues()
     {
-        return array(
-            array(''),
-            array(0),
-        );
+        return [
+            [''],
+            [0],
+        ];
     }
 
     /**
@@ -44,12 +44,12 @@ class SerializedNameTest extends TestCase
      */
     public function testNotAStringSerializedNameParameter($value)
     {
-        new SerializedName(array('value' => $value));
+        new SerializedName(['value' => $value]);
     }
 
     public function testSerializedNameParameters()
     {
-        $maxDepth = new SerializedName(array('value' => 'foo'));
+        $maxDepth = new SerializedName(['value' => 'foo']);
         $this->assertEquals('foo', $maxDepth->getSerializedName());
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/DependencyInjection/SerializerPassTest.php b/src/Symfony/Component/Serializer/Tests/DependencyInjection/SerializerPassTest.php
index fa12454fd0..5c3fedfe89 100644
--- a/src/Symfony/Component/Serializer/Tests/DependencyInjection/SerializerPassTest.php
+++ b/src/Symfony/Component/Serializer/Tests/DependencyInjection/SerializerPassTest.php
@@ -44,8 +44,8 @@ class SerializerPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('serializer')
-            ->addArgument(array())
-            ->addArgument(array());
+            ->addArgument([])
+            ->addArgument([]);
         $container->register('normalizer')->addTag('serializer.normalizer');
 
         $serializerPass = new SerializerPass();
@@ -56,19 +56,19 @@ class SerializerPassTest extends TestCase
     {
         $container = new ContainerBuilder();
 
-        $definition = $container->register('serializer')->setArguments(array(null, null));
-        $container->register('n2')->addTag('serializer.normalizer', array('priority' => 100))->addTag('serializer.encoder', array('priority' => 100));
-        $container->register('n1')->addTag('serializer.normalizer', array('priority' => 200))->addTag('serializer.encoder', array('priority' => 200));
+        $definition = $container->register('serializer')->setArguments([null, null]);
+        $container->register('n2')->addTag('serializer.normalizer', ['priority' => 100])->addTag('serializer.encoder', ['priority' => 100]);
+        $container->register('n1')->addTag('serializer.normalizer', ['priority' => 200])->addTag('serializer.encoder', ['priority' => 200]);
         $container->register('n3')->addTag('serializer.normalizer')->addTag('serializer.encoder');
 
         $serializerPass = new SerializerPass();
         $serializerPass->process($container);
 
-        $expected = array(
+        $expected = [
             new Reference('n1'),
             new Reference('n2'),
             new Reference('n3'),
-        );
+        ];
         $this->assertEquals($expected, $definition->getArgument(0));
         $this->assertEquals($expected, $definition->getArgument(1));
     }
diff --git a/src/Symfony/Component/Serializer/Tests/DeserializeNestedArrayOfObjectsTest.php b/src/Symfony/Component/Serializer/Tests/DeserializeNestedArrayOfObjectsTest.php
index e94c7dc0d8..ffdae811bb 100644
--- a/src/Symfony/Component/Serializer/Tests/DeserializeNestedArrayOfObjectsTest.php
+++ b/src/Symfony/Component/Serializer/Tests/DeserializeNestedArrayOfObjectsTest.php
@@ -22,12 +22,12 @@ class DeserializeNestedArrayOfObjectsTest extends TestCase
 {
     public function provider()
     {
-        return array(
+        return [
             //from property PhpDoc
-            array(Zoo::class),
+            [Zoo::class],
             //from argument constructor PhpDoc
-            array(ZooImmutable::class),
-        );
+            [ZooImmutable::class],
+        ];
     }
 
     /**
@@ -43,10 +43,10 @@ class DeserializeNestedArrayOfObjectsTest extends TestCase
     ]
 }
 EOF;
-        $serializer = new Serializer(array(
+        $serializer = new Serializer([
             new ObjectNormalizer(null, null, null, new PhpDocExtractor()),
             new ArrayDenormalizer(),
-        ), array('json' => new JsonEncoder()));
+        ], ['json' => new JsonEncoder()]);
         //WHEN
         /** @var Zoo $zoo */
         $zoo = $serializer->deserialize($json, $class, 'json');
@@ -59,7 +59,7 @@ EOF;
 class Zoo
 {
     /** @var Animal[] */
-    private $animals = array();
+    private $animals = [];
 
     /**
      * @return Animal[]
@@ -81,12 +81,12 @@ class Zoo
 class ZooImmutable
 {
     /** @var Animal[] */
-    private $animals = array();
+    private $animals = [];
 
     /**
      * @param Animal[] $animals
      */
-    public function __construct(array $animals = array())
+    public function __construct(array $animals = [])
     {
         $this->animals = $animals;
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
index 7d860f65f2..3a84d99dde 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainDecoderTest.php
@@ -32,12 +32,12 @@ class ChainDecoderTest extends TestCase
 
         $this->decoder1
             ->method('supportsDecoding')
-            ->will($this->returnValueMap(array(
-                array(self::FORMAT_1, array(), true),
-                array(self::FORMAT_2, array(), false),
-                array(self::FORMAT_3, array(), false),
-                array(self::FORMAT_3, array('foo' => 'bar'), true),
-            )));
+            ->will($this->returnValueMap([
+                [self::FORMAT_1, [], true],
+                [self::FORMAT_2, [], false],
+                [self::FORMAT_3, [], false],
+                [self::FORMAT_3, ['foo' => 'bar'], true],
+            ]));
 
         $this->decoder2 = $this
             ->getMockBuilder('Symfony\Component\Serializer\Encoder\DecoderInterface')
@@ -45,13 +45,13 @@ class ChainDecoderTest extends TestCase
 
         $this->decoder2
             ->method('supportsDecoding')
-            ->will($this->returnValueMap(array(
-                array(self::FORMAT_1, array(), false),
-                array(self::FORMAT_2, array(), true),
-                array(self::FORMAT_3, array(), false),
-            )));
+            ->will($this->returnValueMap([
+                [self::FORMAT_1, [], false],
+                [self::FORMAT_2, [], true],
+                [self::FORMAT_3, [], false],
+            ]));
 
-        $this->chainDecoder = new ChainDecoder(array($this->decoder1, $this->decoder2));
+        $this->chainDecoder = new ChainDecoder([$this->decoder1, $this->decoder2]);
     }
 
     public function testSupportsDecoding()
@@ -59,7 +59,7 @@ class ChainDecoderTest extends TestCase
         $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_1));
         $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_2));
         $this->assertFalse($this->chainDecoder->supportsDecoding(self::FORMAT_3));
-        $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_3, array('foo' => 'bar')));
+        $this->assertTrue($this->chainDecoder->supportsDecoding(self::FORMAT_3, ['foo' => 'bar']));
     }
 
     public function testDecode()
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
index 82c64cc149..48ccbdca0a 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/ChainEncoderTest.php
@@ -34,12 +34,12 @@ class ChainEncoderTest extends TestCase
 
         $this->encoder1
             ->method('supportsEncoding')
-            ->will($this->returnValueMap(array(
-                array(self::FORMAT_1, array(), true),
-                array(self::FORMAT_2, array(), false),
-                array(self::FORMAT_3, array(), false),
-                array(self::FORMAT_3, array('foo' => 'bar'), true),
-            )));
+            ->will($this->returnValueMap([
+                [self::FORMAT_1, [], true],
+                [self::FORMAT_2, [], false],
+                [self::FORMAT_3, [], false],
+                [self::FORMAT_3, ['foo' => 'bar'], true],
+            ]));
 
         $this->encoder2 = $this
             ->getMockBuilder('Symfony\Component\Serializer\Encoder\EncoderInterface')
@@ -47,13 +47,13 @@ class ChainEncoderTest extends TestCase
 
         $this->encoder2
             ->method('supportsEncoding')
-            ->will($this->returnValueMap(array(
-                array(self::FORMAT_1, array(), false),
-                array(self::FORMAT_2, array(), true),
-                array(self::FORMAT_3, array(), false),
-            )));
+            ->will($this->returnValueMap([
+                [self::FORMAT_1, [], false],
+                [self::FORMAT_2, [], true],
+                [self::FORMAT_3, [], false],
+            ]));
 
-        $this->chainEncoder = new ChainEncoder(array($this->encoder1, $this->encoder2));
+        $this->chainEncoder = new ChainEncoder([$this->encoder1, $this->encoder2]);
     }
 
     public function testSupportsEncoding()
@@ -61,7 +61,7 @@ class ChainEncoderTest extends TestCase
         $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_1));
         $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_2));
         $this->assertFalse($this->chainEncoder->supportsEncoding(self::FORMAT_3));
-        $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_3, array('foo' => 'bar')));
+        $this->assertTrue($this->chainEncoder->supportsEncoding(self::FORMAT_3, ['foo' => 'bar']));
     }
 
     public function testEncode()
@@ -69,7 +69,7 @@ class ChainEncoderTest extends TestCase
         $this->encoder1->expects($this->never())->method('encode');
         $this->encoder2->expects($this->once())->method('encode');
 
-        $this->chainEncoder->encode(array('foo' => 123), self::FORMAT_2);
+        $this->chainEncoder->encode(['foo' => 123], self::FORMAT_2);
     }
 
     /**
@@ -77,7 +77,7 @@ class ChainEncoderTest extends TestCase
      */
     public function testEncodeUnsupportedFormat()
     {
-        $this->chainEncoder->encode(array('foo' => 123), self::FORMAT_3);
+        $this->chainEncoder->encode(['foo' => 123], self::FORMAT_3);
     }
 
     public function testNeedsNormalizationBasic()
@@ -98,7 +98,7 @@ class ChainEncoderTest extends TestCase
         $chainEncoder->method('supportsEncoding')->willReturn(true);
         $chainEncoder->method('needsNormalization')->willReturn($bool);
 
-        $sut = new ChainEncoder(array($chainEncoder));
+        $sut = new ChainEncoder([$chainEncoder]);
 
         $this->assertEquals($bool, $sut->needsNormalization(self::FORMAT_1));
     }
@@ -106,17 +106,17 @@ class ChainEncoderTest extends TestCase
     public function testNeedsNormalizationNormalizationAware()
     {
         $encoder = new NormalizationAwareEncoder();
-        $sut = new ChainEncoder(array($encoder));
+        $sut = new ChainEncoder([$encoder]);
 
         $this->assertFalse($sut->needsNormalization(self::FORMAT_1));
     }
 
     public function booleanProvider()
     {
-        return array(
-            array(true),
-            array(false),
-        );
+        return [
+            [true],
+            [false],
+        ];
     }
 }
 
@@ -131,7 +131,7 @@ class NormalizationAwareEncoder implements EncoderInterface, NormalizationAwareI
         return true;
     }
 
-    public function encode($data, $format, array $context = array())
+    public function encode($data, $format, array $context = [])
     {
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
index 86ea75b9ea..04d98c5833 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/CsvEncoderTest.php
@@ -37,7 +37,7 @@ class CsvEncoderTest extends TestCase
 
     public function testEncode()
     {
-        $value = array('foo' => 'hello', 'bar' => 'hey ho');
+        $value = ['foo' => 'hello', 'bar' => 'hey ho'];
 
         $this->assertEquals(<<<'CSV'
 foo,bar
@@ -49,10 +49,10 @@ CSV
 
     public function testEncodeCollection()
     {
-        $value = array(
-            array('foo' => 'hello', 'bar' => 'hey ho'),
-            array('foo' => 'hi', 'bar' => 'let\'s go'),
-        );
+        $value = [
+            ['foo' => 'hello', 'bar' => 'hey ho'],
+            ['foo' => 'hi', 'bar' => 'let\'s go'],
+        ];
 
         $this->assertEquals(<<<'CSV'
 foo,bar
@@ -70,7 +70,7 @@ CSV
 a,b,c
 
 CSV
-            , $this->encoder->encode(array('a', 'b', 'c'), 'csv'));
+            , $this->encoder->encode(['a', 'b', 'c'], 'csv'));
     }
 
     public function testEncodeNonArray()
@@ -85,10 +85,10 @@ CSV
 
     public function testEncodeNestedArrays()
     {
-        $value = array('foo' => 'hello', 'bar' => array(
-            array('id' => 'yo', 1 => 'wesh'),
-            array('baz' => 'Halo', 'foo' => 'olá'),
-        ));
+        $value = ['foo' => 'hello', 'bar' => [
+            ['id' => 'yo', 1 => 'wesh'],
+            ['baz' => 'Halo', 'foo' => 'olá'],
+        ]];
 
         $this->assertEquals(<<<'CSV'
 foo,bar.0.id,bar.0.1,bar.1.baz,bar.1.foo
@@ -113,15 +113,15 @@ CSV
         if ($legacy) {
             $this->encoder = new CsvEncoder(';', "'", '|', '-');
         } else {
-            $this->encoder = new CsvEncoder(array(
+            $this->encoder = new CsvEncoder([
                 CsvEncoder::DELIMITER_KEY => ';',
                 CsvEncoder::ENCLOSURE_KEY => "'",
                 CsvEncoder::ESCAPE_CHAR_KEY => '|',
                 CsvEncoder::KEY_SEPARATOR_KEY => '-',
-            ));
+            ]);
         }
 
-        $value = array('a' => 'he\'llo', 'c' => array('d' => 'foo'));
+        $value = ['a' => 'he\'llo', 'c' => ['d' => 'foo']];
 
         $this->assertEquals(<<<'CSV'
 a;c-d
@@ -133,34 +133,34 @@ CSV
 
     public function testEncodeCustomSettingsPassedInContext()
     {
-        $value = array('a' => 'he\'llo', 'c' => array('d' => 'foo'));
+        $value = ['a' => 'he\'llo', 'c' => ['d' => 'foo']];
 
         $this->assertSame(<<<'CSV'
 a;c-d
 'he''llo';foo
 
 CSV
-        , $this->encoder->encode($value, 'csv', array(
+        , $this->encoder->encode($value, 'csv', [
             CsvEncoder::DELIMITER_KEY => ';',
             CsvEncoder::ENCLOSURE_KEY => "'",
             CsvEncoder::ESCAPE_CHAR_KEY => '|',
             CsvEncoder::KEY_SEPARATOR_KEY => '-',
-        )));
+        ]));
     }
 
     public function testEncodeEmptyArray()
     {
-        $this->assertEquals("\n\n", $this->encoder->encode(array(), 'csv'));
-        $this->assertEquals("\n\n", $this->encoder->encode(array(array()), 'csv'));
+        $this->assertEquals("\n\n", $this->encoder->encode([], 'csv'));
+        $this->assertEquals("\n\n", $this->encoder->encode([[]], 'csv'));
     }
 
     public function testEncodeVariableStructure()
     {
-        $value = array(
-            array('a' => array('foo', 'bar')),
-            array('a' => array(), 'b' => 'baz'),
-            array('a' => array('bar', 'foo'), 'c' => 'pong'),
-        );
+        $value = [
+            ['a' => ['foo', 'bar']],
+            ['a' => [], 'b' => 'baz'],
+            ['a' => ['bar', 'foo'], 'c' => 'pong'],
+        ];
         $csv = <<<CSV
 a.0,a.1,c,b
 foo,bar,,
@@ -174,15 +174,15 @@ CSV;
 
     public function testEncodeCustomHeaders()
     {
-        $context = array(
-            CsvEncoder::HEADERS_KEY => array(
+        $context = [
+            CsvEncoder::HEADERS_KEY => [
                 'b',
                 'c',
-            ),
-        );
-        $value = array(
-            array('a' => 'foo', 'b' => 'bar'),
-        );
+            ],
+        ];
+        $value = [
+            ['a' => 'foo', 'b' => 'bar'],
+        ];
         $csv = <<<CSV
 b,c,a
 bar,,foo
@@ -207,7 +207,7 @@ CSV;
         if ($legacy) {
             $this->encoder = new CsvEncoder(',', '"', '\\', '.', true);
         } else {
-            $this->encoder = new CsvEncoder(array(CsvEncoder::ESCAPE_FORMULAS_KEY => true));
+            $this->encoder = new CsvEncoder([CsvEncoder::ESCAPE_FORMULAS_KEY => true]);
         }
 
         $this->assertSame(<<<'CSV'
@@ -215,28 +215,28 @@ CSV;
 "	=2+3"
 
 CSV
-            , $this->encoder->encode(array('=2+3'), 'csv'));
+            , $this->encoder->encode(['=2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 "	-2+3"
 
 CSV
-            , $this->encoder->encode(array('-2+3'), 'csv'));
+            , $this->encoder->encode(['-2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 "	+2+3"
 
 CSV
-            , $this->encoder->encode(array('+2+3'), 'csv'));
+            , $this->encoder->encode(['+2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 "	@MyDataColumn"
 
 CSV
-            , $this->encoder->encode(array('@MyDataColumn'), 'csv'));
+            , $this->encoder->encode(['@MyDataColumn'], 'csv'));
     }
 
     public function testDoNotEncodeFormulas()
@@ -246,28 +246,28 @@ CSV
 =2+3
 
 CSV
-            , $this->encoder->encode(array('=2+3'), 'csv'));
+            , $this->encoder->encode(['=2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 -2+3
 
 CSV
-            , $this->encoder->encode(array('-2+3'), 'csv'));
+            , $this->encoder->encode(['-2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 +2+3
 
 CSV
-            , $this->encoder->encode(array('+2+3'), 'csv'));
+            , $this->encoder->encode(['+2+3'], 'csv'));
 
         $this->assertSame(<<<'CSV'
 0
 @MyDataColumn
 
 CSV
-            , $this->encoder->encode(array('@MyDataColumn'), 'csv'));
+            , $this->encoder->encode(['@MyDataColumn'], 'csv'));
     }
 
     public function testEncodeFormulasWithSettingsPassedInContext()
@@ -277,36 +277,36 @@ CSV
 "	=2+3"
 
 CSV
-            , $this->encoder->encode(array('=2+3'), 'csv', array(
+            , $this->encoder->encode(['=2+3'], 'csv', [
                 CsvEncoder::ESCAPE_FORMULAS_KEY => true,
-            )));
+            ]));
 
         $this->assertSame(<<<'CSV'
 0
 "	-2+3"
 
 CSV
-            , $this->encoder->encode(array('-2+3'), 'csv', array(
+            , $this->encoder->encode(['-2+3'], 'csv', [
                 CsvEncoder::ESCAPE_FORMULAS_KEY => true,
-            )));
+            ]));
 
         $this->assertSame(<<<'CSV'
 0
 "	+2+3"
 
 CSV
-            , $this->encoder->encode(array('+2+3'), 'csv', array(
+            , $this->encoder->encode(['+2+3'], 'csv', [
                 CsvEncoder::ESCAPE_FORMULAS_KEY => true,
-            )));
+            ]));
 
         $this->assertSame(<<<'CSV'
 0
 "	@MyDataColumn"
 
 CSV
-            , $this->encoder->encode(array('@MyDataColumn'), 'csv', array(
+            , $this->encoder->encode(['@MyDataColumn'], 'csv', [
                 CsvEncoder::ESCAPE_FORMULAS_KEY => true,
-            )));
+            ]));
     }
 
     public function testEncodeWithoutHeader()
@@ -333,7 +333,7 @@ CSV
      */
     public function testDecodeLegacy()
     {
-        $expected = array('foo' => 'a', 'bar' => 'b');
+        $expected = ['foo' => 'a', 'bar' => 'b'];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,bar
@@ -344,22 +344,22 @@ CSV
 
     public function testDecodeAsSingle()
     {
-        $expected = array('foo' => 'a', 'bar' => 'b');
+        $expected = ['foo' => 'a', 'bar' => 'b'];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,bar
 a,b
 CSV
-        , 'csv', array(CsvEncoder::AS_COLLECTION_KEY => false)));
+        , 'csv', [CsvEncoder::AS_COLLECTION_KEY => false]));
     }
 
     public function testDecodeCollection()
     {
-        $expected = array(
-            array('foo' => 'a', 'bar' => 'b'),
-            array('foo' => 'c', 'bar' => 'd'),
-            array('foo' => 'f'),
-        );
+        $expected = [
+            ['foo' => 'a', 'bar' => 'b'],
+            ['foo' => 'c', 'bar' => 'd'],
+            ['foo' => 'f'],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,bar
@@ -373,28 +373,28 @@ CSV
 
     public function testDecode()
     {
-        $expected = array(
-            array('foo' => 'a'),
-        );
+        $expected = [
+            ['foo' => 'a'],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo
 a
 
 CSV
-        , 'csv', array(
+        , 'csv', [
             CsvEncoder::AS_COLLECTION_KEY => true, // Can be removed in 5.0
-        )));
+        ]));
     }
 
     public function testDecodeToManyRelation()
     {
-        $expected = array(
-            array('foo' => 'bar', 'relations' => array(array('a' => 'b'), array('a' => 'b'))),
-            array('foo' => 'bat', 'relations' => array(array('a' => 'b'), array('a' => ''))),
-            array('foo' => 'bat', 'relations' => array(array('a' => 'b'))),
-            array('foo' => 'baz', 'relations' => array(array('a' => 'c'), array('a' => 'c'))),
-        );
+        $expected = [
+            ['foo' => 'bar', 'relations' => [['a' => 'b'], ['a' => 'b']]],
+            ['foo' => 'bat', 'relations' => [['a' => 'b'], ['a' => '']]],
+            ['foo' => 'bat', 'relations' => [['a' => 'b']]],
+            ['foo' => 'baz', 'relations' => [['a' => 'c'], ['a' => 'c']]],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,relations.0.a,relations.1.a
@@ -408,10 +408,10 @@ CSV
 
     public function testDecodeNestedArrays()
     {
-        $expected = array(
-            array('foo' => 'a', 'bar' => array('baz' => array('bat' => 'b'))),
-            array('foo' => 'c', 'bar' => array('baz' => array('bat' => 'd'))),
-        );
+        $expected = [
+            ['foo' => 'a', 'bar' => ['baz' => ['bat' => 'b']]],
+            ['foo' => 'c', 'bar' => ['baz' => ['bat' => 'd']]],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,bar.baz.bat
@@ -436,47 +436,47 @@ CSV
         if ($legacy) {
             $this->encoder = new CsvEncoder(';', "'", '|', '-');
         } else {
-            $this->encoder = new CsvEncoder(array(
+            $this->encoder = new CsvEncoder([
                 CsvEncoder::DELIMITER_KEY => ';',
                 CsvEncoder::ENCLOSURE_KEY => "'",
                 CsvEncoder::ESCAPE_CHAR_KEY => '|',
                 CsvEncoder::KEY_SEPARATOR_KEY => '-',
-            ));
+            ]);
         }
 
-        $expected = array(array('a' => 'hell\'o', 'bar' => array('baz' => 'b')));
+        $expected = [['a' => 'hell\'o', 'bar' => ['baz' => 'b']]];
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 a;bar-baz
 'hell''o';b;c
 CSV
-        , 'csv', array(
+        , 'csv', [
             CsvEncoder::AS_COLLECTION_KEY => true, // Can be removed in 5.0
-        )));
+        ]));
     }
 
     public function testDecodeCustomSettingsPassedInContext()
     {
-        $expected = array(array('a' => 'hell\'o', 'bar' => array('baz' => 'b')));
+        $expected = [['a' => 'hell\'o', 'bar' => ['baz' => 'b']]];
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 a;bar-baz
 'hell''o';b;c
 CSV
-        , 'csv', array(
+        , 'csv', [
             CsvEncoder::DELIMITER_KEY => ';',
             CsvEncoder::ENCLOSURE_KEY => "'",
             CsvEncoder::ESCAPE_CHAR_KEY => '|',
             CsvEncoder::KEY_SEPARATOR_KEY => '-',
             CsvEncoder::AS_COLLECTION_KEY => true, // Can be removed in 5.0
-        )));
+        ]));
     }
 
     public function testDecodeMalformedCollection()
     {
-        $expected = array(
-            array('foo' => 'a', 'bar' => 'b'),
-            array('foo' => 'c', 'bar' => 'd'),
-            array('foo' => 'f'),
-        );
+        $expected = [
+            ['foo' => 'a', 'bar' => 'b'],
+            ['foo' => 'c', 'bar' => 'd'],
+            ['foo' => 'f'],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode(<<<'CSV'
 foo,bar
@@ -490,7 +490,7 @@ CSV
 
     public function testDecodeEmptyArray()
     {
-        $this->assertEquals(array(), $this->encoder->decode('', 'csv'));
+        $this->assertEquals([], $this->encoder->decode('', 'csv'));
     }
 
     public function testDecodeWithoutHeader()
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
index f4208f1256..c5a5551f76 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonDecodeTest.php
@@ -47,12 +47,12 @@ class JsonDecodeTest extends TestCase
         $stdClass = new \stdClass();
         $stdClass->foo = 'bar';
 
-        $assoc = array('foo' => 'bar');
+        $assoc = ['foo' => 'bar'];
 
-        return array(
-            array('{"foo": "bar"}', $stdClass, array()),
-            array('{"foo": "bar"}', $assoc, array('json_decode_associative' => true)),
-        );
+        return [
+            ['{"foo": "bar"}', $stdClass, []],
+            ['{"foo": "bar"}', $assoc, ['json_decode_associative' => true]],
+        ];
     }
 
     /**
@@ -66,9 +66,9 @@ class JsonDecodeTest extends TestCase
 
     public function decodeProviderException()
     {
-        return array(
-            array("{'foo': 'bar'}"),
-            array('kaboom!'),
-        );
+        return [
+            ["{'foo': 'bar'}"],
+            ['kaboom!'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
index f4cbf76afc..1a1a135ce0 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncodeTest.php
@@ -43,10 +43,10 @@ class JsonEncodeTest extends TestCase
 
     public function encodeProvider()
     {
-        return array(
-            array(array(), '[]', array()),
-            array(array(), '{}', array('json_encode_options' => JSON_FORCE_OBJECT)),
-        );
+        return [
+            [[], '[]', []],
+            [[], '{}', ['json_encode_options' => JSON_FORCE_OBJECT]],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
index 1977d4f19c..439fbda163 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/JsonEncoderTest.php
@@ -24,7 +24,7 @@ class JsonEncoderTest extends TestCase
     protected function setUp()
     {
         $this->encoder = new JsonEncoder();
-        $this->serializer = new Serializer(array(new CustomNormalizer()), array('json' => new JsonEncoder()));
+        $this->serializer = new Serializer([new CustomNormalizer()], ['json' => new JsonEncoder()]);
     }
 
     public function testEncodeScalar()
@@ -48,16 +48,16 @@ class JsonEncoderTest extends TestCase
 
     public function testOptions()
     {
-        $context = array('json_encode_options' => JSON_NUMERIC_CHECK);
+        $context = ['json_encode_options' => JSON_NUMERIC_CHECK];
 
-        $arr = array();
+        $arr = [];
         $arr['foo'] = '3';
 
         $expected = '{"foo":3}';
 
         $this->assertEquals($expected, $this->serializer->serialize($arr, 'json', $context));
 
-        $arr = array();
+        $arr = [];
         $arr['foo'] = '3';
 
         $expected = '{"foo":"3"}';
@@ -70,22 +70,22 @@ class JsonEncoderTest extends TestCase
      */
     public function testEncodeNotUtf8WithoutPartialOnError()
     {
-        $arr = array(
+        $arr = [
             'utf8' => 'Hello World!',
             'notUtf8' => "\xb0\xd0\xb5\xd0",
-        );
+        ];
 
         $this->encoder->encode($arr, 'json');
     }
 
     public function testEncodeNotUtf8WithPartialOnError()
     {
-        $context = array('json_encode_options' => JSON_PARTIAL_OUTPUT_ON_ERROR);
+        $context = ['json_encode_options' => JSON_PARTIAL_OUTPUT_ON_ERROR];
 
-        $arr = array(
+        $arr = [
             'utf8' => 'Hello World!',
             'notUtf8' => "\xb0\xd0\xb5\xd0",
-        );
+        ];
 
         $result = $this->encoder->encode($arr, 'json', $context);
         $jsonLastError = json_last_error();
@@ -112,8 +112,8 @@ class JsonEncoderTest extends TestCase
     {
         $obj = new \stdClass();
         $obj->foo = 'foo';
-        $obj->bar = array('a', 'b');
-        $obj->baz = array('key' => 'val', 'key2' => 'val', 'A B' => 'bar', 'item' => array(array('title' => 'title1'), array('title' => 'title2')), 'Barry' => array('FooBar' => array('Baz' => 'Ed', '@id' => 1)));
+        $obj->bar = ['a', 'b'];
+        $obj->baz = ['key' => 'val', 'key2' => 'val', 'A B' => 'bar', 'item' => [['title' => 'title1'], ['title' => 'title2']], 'Barry' => ['FooBar' => ['Baz' => 'Ed', '@id' => 1]]];
         $obj->qux = '1';
 
         return $obj;
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
index 6ef68c13f9..53b7f7b691 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/XmlEncoderTest.php
@@ -32,7 +32,7 @@ class XmlEncoderTest extends TestCase
     protected function setUp()
     {
         $this->encoder = new XmlEncoder();
-        $serializer = new Serializer(array(new CustomNormalizer()), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([new CustomNormalizer()], ['xml' => new XmlEncoder()]);
         $this->encoder->setSerializer($serializer);
     }
 
@@ -74,19 +74,19 @@ class XmlEncoderTest extends TestCase
     public function testAttributes()
     {
         $obj = new ScalarDummy();
-        $obj->xmlFoo = array(
-            'foo-bar' => array(
+        $obj->xmlFoo = [
+            'foo-bar' => [
                 '@id' => 1,
                 '@name' => 'Bar',
-            ),
-            'Foo' => array(
+            ],
+            'Foo' => [
                 'Bar' => 'Test',
                 '@Type' => 'test',
-            ),
+            ],
             'föo_bär' => 'a',
-            'Bar' => array(1, 2, 3),
+            'Bar' => [1, 2, 3],
             'a' => 'b',
-        );
+        ];
         $expected = '<?xml version="1.0"?>'."\n".
             '<response>'.
             '<foo-bar id="1" name="Bar"/>'.
@@ -103,11 +103,11 @@ class XmlEncoderTest extends TestCase
     public function testElementNameValid()
     {
         $obj = new ScalarDummy();
-        $obj->xmlFoo = array(
+        $obj->xmlFoo = [
             'foo-bar' => 'a',
             'foo_bar' => 'a',
             'föo_bär' => 'a',
-        );
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response>'.
@@ -122,7 +122,7 @@ class XmlEncoderTest extends TestCase
     public function testEncodeSimpleXML()
     {
         $xml = simplexml_load_string('<firstname>Peter</firstname>');
-        $array = array('person' => $xml);
+        $array = ['person' => $xml];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response><person><firstname>Peter</firstname></person></response>'."\n";
@@ -133,35 +133,35 @@ class XmlEncoderTest extends TestCase
     public function testEncodeXmlAttributes()
     {
         $xml = simplexml_load_string('<firstname>Peter</firstname>');
-        $array = array('person' => $xml);
+        $array = ['person' => $xml];
 
         $expected = '<?xml version="1.1" encoding="utf-8" standalone="yes"?>'."\n".
             '<response><person><firstname>Peter</firstname></person></response>'."\n";
 
-        $context = array(
+        $context = [
             'xml_version' => '1.1',
             'xml_encoding' => 'utf-8',
             'xml_standalone' => true,
-        );
+        ];
 
         $this->assertSame($expected, $this->encoder->encode($array, 'xml', $context));
     }
 
     public function testEncodeRemovingEmptyTags()
     {
-        $array = array('person' => array('firstname' => 'Peter', 'lastname' => null));
+        $array = ['person' => ['firstname' => 'Peter', 'lastname' => null]];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response><person><firstname>Peter</firstname></person></response>'."\n";
 
-        $context = array('remove_empty_tags' => true);
+        $context = ['remove_empty_tags' => true];
 
         $this->assertSame($expected, $this->encoder->encode($array, 'xml', $context));
     }
 
     public function testEncodeNotRemovingEmptyTags()
     {
-        $array = array('person' => array('firstname' => 'Peter', 'lastname' => null));
+        $array = ['person' => ['firstname' => 'Peter', 'lastname' => null]];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response><person><firstname>Peter</firstname><lastname/></person></response>'."\n";
@@ -171,7 +171,7 @@ class XmlEncoderTest extends TestCase
 
     public function testContext()
     {
-        $array = array('person' => array('name' => 'George Abitbol'));
+        $array = ['person' => ['name' => 'George Abitbol']];
         $expected = <<<'XML'
 <?xml version="1.0"?>
 <response>
@@ -182,19 +182,19 @@ class XmlEncoderTest extends TestCase
 
 XML;
 
-        $context = array(
+        $context = [
             'xml_format_output' => true,
-        );
+        ];
 
         $this->assertSame($expected, $this->encoder->encode($array, 'xml', $context));
     }
 
     public function testEncodeScalarRootAttributes()
     {
-        $array = array(
+        $array = [
             '#' => 'Paul',
             '@gender' => 'm',
-        );
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response gender="m">Paul</response>'."\n";
@@ -204,10 +204,10 @@ XML;
 
     public function testEncodeRootAttributes()
     {
-        $array = array(
+        $array = [
             'firstname' => 'Paul',
             '@gender' => 'm',
-        );
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response gender="m"><firstname>Paul</firstname></response>'."\n";
@@ -217,9 +217,9 @@ XML;
 
     public function testEncodeCdataWrapping()
     {
-        $array = array(
+        $array = [
             'firstname' => 'Paul <or Me>',
-        );
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response><firstname><![CDATA[Paul <or Me>]]></firstname></response>'."\n";
@@ -229,9 +229,9 @@ XML;
 
     public function testEncodeScalarWithAttribute()
     {
-        $array = array(
-            'person' => array('@gender' => 'M', '#' => 'Peter'),
-        );
+        $array = [
+            'person' => ['@gender' => 'M', '#' => 'Peter'],
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<response><person gender="M">Peter</person></response>'."\n";
@@ -254,7 +254,7 @@ XML;
 <document index="182077241760011681341821060401202210011000045913000000017100">Name</document>
 XML;
 
-        $this->assertSame(array('@index' => 182077241760011681341821060401202210011000045913000000017100, '#' => 'Name'), $this->encoder->decode($source, 'xml'));
+        $this->assertSame(['@index' => 182077241760011681341821060401202210011000045913000000017100, '#' => 'Name'], $this->encoder->decode($source, 'xml'));
     }
 
     public function testDecodeNegativeIntAttribute()
@@ -264,7 +264,7 @@ XML;
 <document index="-1234">Name</document>
 XML;
 
-        $this->assertSame(array('@index' => -1234, '#' => 'Name'), $this->encoder->decode($source, 'xml'));
+        $this->assertSame(['@index' => -1234, '#' => 'Name'], $this->encoder->decode($source, 'xml'));
     }
 
     public function testDecodeFloatAttribute()
@@ -274,7 +274,7 @@ XML;
 <document index="-12.11">Name</document>
 XML;
 
-        $this->assertSame(array('@index' => -12.11, '#' => 'Name'), $this->encoder->decode($source, 'xml'));
+        $this->assertSame(['@index' => -12.11, '#' => 'Name'], $this->encoder->decode($source, 'xml'));
     }
 
     public function testDecodeNegativeFloatAttribute()
@@ -284,7 +284,7 @@ XML;
 <document index="-12.11">Name</document>
 XML;
 
-        $this->assertSame(array('@index' => -12.11, '#' => 'Name'), $this->encoder->decode($source, 'xml'));
+        $this->assertSame(['@index' => -12.11, '#' => 'Name'], $this->encoder->decode($source, 'xml'));
     }
 
     public function testNoTypeCastAttribute()
@@ -296,16 +296,16 @@ XML;
 </document>
 XML;
 
-        $data = $this->encoder->decode($source, 'xml', array('xml_type_cast_attributes' => false));
-        $expected = array(
+        $data = $this->encoder->decode($source, 'xml', ['xml_type_cast_attributes' => false]);
+        $expected = [
             '@a' => '018',
             '@b' => '-12.11',
-            'node' => array(
+            'node' => [
                 '@a' => '018',
                 '@b' => '-12.11',
                 '#' => '',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expected, $data);
     }
 
@@ -327,14 +327,14 @@ XML;
 
     public function testEncodeSerializerXmlRootNodeNameOption()
     {
-        $options = array('xml_root_node_name' => 'test');
+        $options = ['xml_root_node_name' => 'test'];
         $this->encoder = new XmlEncoder();
-        $serializer = new Serializer(array(), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([], ['xml' => new XmlEncoder()]);
         $this->encoder->setSerializer($serializer);
 
-        $array = array(
-            'person' => array('@gender' => 'M', '#' => 'Peter'),
-        );
+        $array = [
+            'person' => ['@gender' => 'M', '#' => 'Peter'],
+        ];
 
         $expected = '<?xml version="1.0"?>'."\n".
             '<test><person gender="M">Peter</person></test>'."\n";
@@ -345,7 +345,7 @@ XML;
     public function testEncodeTraversableWhenNormalizable()
     {
         $this->encoder = new XmlEncoder();
-        $serializer = new Serializer(array(new CustomNormalizer()), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([new CustomNormalizer()], ['xml' => new XmlEncoder()]);
         $this->encoder->setSerializer($serializer);
 
         $expected = <<<'XML'
@@ -367,9 +367,9 @@ XML;
 
     public function testDecodeCdataWrapping()
     {
-        $expected = array(
+        $expected = [
             'firstname' => 'Paul <or Me>',
-        );
+        ];
 
         $xml = '<?xml version="1.0"?>'."\n".
             '<response><firstname><![CDATA[Paul <or Me>]]></firstname></response>'."\n";
@@ -379,9 +379,9 @@ XML;
 
     public function testDecodeCdataWrappingAndWhitespace()
     {
-        $expected = array(
+        $expected = [
             'firstname' => 'Paul <or Me>',
-        );
+        ];
 
         $xml = '<?xml version="1.0"?>'."\n".
             '<response><firstname>'."\n".
@@ -403,9 +403,9 @@ XML;
         $source = '<?xml version="1.0"?>'."\n".
             '<response><person gender="M">Peter</person></response>'."\n";
 
-        $expected = array(
-            'person' => array('@gender' => 'M', '#' => 'Peter'),
-        );
+        $expected = [
+            'person' => ['@gender' => 'M', '#' => 'Peter'],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -415,10 +415,10 @@ XML;
         $source = '<?xml version="1.0"?>'."\n".
             '<person gender="M">Peter</person>'."\n";
 
-        $expected = array(
+        $expected = [
             '#' => 'Peter',
             '@gender' => 'M',
-        );
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -428,11 +428,11 @@ XML;
         $source = '<?xml version="1.0"?>'."\n".
             '<person gender="M"><firstname>Peter</firstname><lastname>Mac Calloway</lastname></person>'."\n";
 
-        $expected = array(
+        $expected = [
             'firstname' => 'Peter',
             'lastname' => 'Mac Calloway',
             '@gender' => 'M',
-        );
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -447,12 +447,12 @@ XML;
             '</people>'.
             '</response>'."\n";
 
-        $expected = array(
-            'people' => array('person' => array(
-                array('firstname' => 'Benjamin', 'lastname' => 'Alexandre'),
-                array('firstname' => 'Damien', 'lastname' => 'Clay'),
-            )),
-        );
+        $expected = [
+            'people' => ['person' => [
+                ['firstname' => 'Benjamin', 'lastname' => 'Alexandre'],
+                ['firstname' => 'Damien', 'lastname' => 'Clay'],
+            ]],
+        ];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -510,10 +510,10 @@ XML;
     </person>
 </people>
 XML;
-        $expected = array('person' => array(
-            array('firstname' => 'Benjamin', 'lastname' => 'Alexandre'),
-            array('firstname' => 'Damien', 'lastname' => 'Clay'),
-        ));
+        $expected = ['person' => [
+            ['firstname' => 'Benjamin', 'lastname' => 'Alexandre'],
+            ['firstname' => 'Damien', 'lastname' => 'Clay'],
+        ]];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -537,10 +537,10 @@ XML;
 </people>
 XML;
 
-        $expected = array('person' => array(
-          array('firstname' => 'Benjamin', 'lastname' => 'Alexandre'),
-          array('firstname' => 'Damien', 'lastname' => 'Clay'),
-        ));
+        $expected = ['person' => [
+          ['firstname' => 'Benjamin', 'lastname' => 'Alexandre'],
+          ['firstname' => 'Damien', 'lastname' => 'Clay'],
+        ]];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -573,20 +573,20 @@ XML;
 XML;
 
         if ($legacy) {
-            $this->encoder = new XmlEncoder('people', null, array(XML_PI_NODE));
+            $this->encoder = new XmlEncoder('people', null, [XML_PI_NODE]);
         } else {
-            $this->encoder = new XmlEncoder(array(
+            $this->encoder = new XmlEncoder([
                 XmlEncoder::ROOT_NODE_NAME => 'people',
-                XmlEncoder::DECODER_IGNORED_NODE_TYPES => array(XML_PI_NODE),
-            ));
+                XmlEncoder::DECODER_IGNORED_NODE_TYPES => [XML_PI_NODE],
+            ]);
         }
-        $serializer = new Serializer(array(new CustomNormalizer()), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([new CustomNormalizer()], ['xml' => new XmlEncoder()]);
         $this->encoder->setSerializer($serializer);
 
-        $expected = array('person' => array(
-          array('firstname' => 'Benjamin', 'lastname' => 'Alexandre', '#comment' => ' This comment should be decoded. '),
-          array('firstname' => 'Damien', 'lastname' => 'Clay'),
-        ));
+        $expected = ['person' => [
+          ['firstname' => 'Benjamin', 'lastname' => 'Alexandre', '#comment' => ' This comment should be decoded. '],
+          ['firstname' => 'Damien', 'lastname' => 'Clay'],
+        ]];
 
         $this->assertEquals($expected, $this->encoder->decode($source, 'xml'));
     }
@@ -606,9 +606,9 @@ XML;
         if ($legacy) {
             $this->encoder = new XmlEncoder('response', null);
         } else {
-            $this->encoder = new XmlEncoder(array(XmlEncoder::ROOT_NODE_NAME => 'response'));
+            $this->encoder = new XmlEncoder([XmlEncoder::ROOT_NODE_NAME => 'response']);
         }
-        $serializer = new Serializer(array(new CustomNormalizer()), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([new CustomNormalizer()], ['xml' => new XmlEncoder()]);
         $this->encoder->setSerializer($serializer);
 
         $source = <<<'XML'
@@ -620,47 +620,47 @@ XML;
     </order_row>
 </order_rows>
 XML;
-        $expected = array(
+        $expected = [
             '@nodeType' => 'order_row',
             '@virtualEntity' => 'true',
-            'order_row' => array(array(
-                'id' => array(16),
-                'test' => array(16),
-            )),
-        );
+            'order_row' => [[
+                'id' => [16],
+                'test' => [16],
+            ]],
+        ];
 
-        $this->assertEquals($expected, $this->encoder->decode($source, 'xml', array('as_collection' => true)));
+        $this->assertEquals($expected, $this->encoder->decode($source, 'xml', ['as_collection' => true]));
     }
 
     public function testDecodeWithoutItemHash()
     {
         $obj = new ScalarDummy();
-        $obj->xmlFoo = array(
-            'foo-bar' => array(
+        $obj->xmlFoo = [
+            'foo-bar' => [
                 '@key' => 'value',
-                'item' => array('@key' => 'key', 'key-val' => 'val'),
-            ),
-            'Foo' => array(
+                'item' => ['@key' => 'key', 'key-val' => 'val'],
+            ],
+            'Foo' => [
                 'Bar' => 'Test',
                 '@Type' => 'test',
-            ),
+            ],
             'föo_bär' => 'a',
-            'Bar' => array(1, 2, 3),
+            'Bar' => [1, 2, 3],
             'a' => 'b',
-        );
-        $expected = array(
-            'foo-bar' => array(
+        ];
+        $expected = [
+            'foo-bar' => [
                 '@key' => 'value',
-                'key' => array('@key' => 'key', 'key-val' => 'val'),
-            ),
-            'Foo' => array(
+                'key' => ['@key' => 'key', 'key-val' => 'val'],
+            ],
+            'Foo' => [
                 'Bar' => 'Test',
                 '@Type' => 'test',
-            ),
+            ],
             'föo_bär' => 'a',
-            'Bar' => array(1, 2, 3),
+            'Bar' => [1, 2, 3],
             'a' => 'b',
-        );
+        ];
         $xml = $this->encoder->encode($obj, 'xml');
         $this->assertEquals($expected, $this->encoder->decode($xml, 'xml'));
     }
@@ -720,7 +720,7 @@ XML;
 
     protected function getNamespacedArray()
     {
-        return array(
+        return [
             '@xmlns' => 'http://www.w3.org/2005/Atom',
             '@xmlns:app' => 'http://www.w3.org/2007/app',
             '@xmlns:media' => 'http://search.yahoo.com/mrss/',
@@ -728,36 +728,36 @@ XML;
             '@xmlns:yt' => 'http://gdata.youtube.com/schemas/2007',
             'qux' => '1',
             'app:foo' => 'foo',
-            'yt:bar' => array('a', 'b'),
-            'media:baz' => array(
+            'yt:bar' => ['a', 'b'],
+            'media:baz' => [
                 'media:key' => 'val',
                 'media:key2' => 'val',
                 'A B' => 'bar',
-                'item' => array(
-                    array(
+                'item' => [
+                    [
                         'title' => 'title1',
-                    ),
-                    array(
+                    ],
+                    [
                         'title' => 'title2',
-                    ),
-                ),
-                'Barry' => array(
+                    ],
+                ],
+                'Barry' => [
                     '@size' => 'large',
-                    'FooBar' => array(
+                    'FooBar' => [
                         'Baz' => 'Ed',
                         '@gd:id' => 1,
-                    ),
-                ),
-            ),
-        );
+                    ],
+                ],
+            ],
+        ];
     }
 
     protected function getObject()
     {
         $obj = new Dummy();
         $obj->foo = 'foo';
-        $obj->bar = array('a', 'b');
-        $obj->baz = array('key' => 'val', 'key2' => 'val', 'A B' => 'bar', 'item' => array(array('title' => 'title1'), array('title' => 'title2')), 'Barry' => array('FooBar' => array('Baz' => 'Ed', '@id' => 1)));
+        $obj->bar = ['a', 'b'];
+        $obj->baz = ['key' => 'val', 'key2' => 'val', 'A B' => 'bar', 'item' => [['title' => 'title1'], ['title' => 'title2']], 'Barry' => ['FooBar' => ['Baz' => 'Ed', '@id' => 1]]];
         $obj->qux = '1';
 
         return $obj;
@@ -771,7 +771,7 @@ XML;
 
 XML;
 
-        $actualXml = $this->encoder->encode(array('foo' => true, 'bar' => false), 'xml');
+        $actualXml = $this->encoder->encode(['foo' => true, 'bar' => false], 'xml');
 
         $this->assertEquals($expectedXml, $actualXml);
     }
@@ -780,7 +780,7 @@ XML;
     {
         $xmlEncoder = $this->createXmlEncoderWithDateTimeNormalizer();
 
-        $actualXml = $xmlEncoder->encode(array('dateTime' => new \DateTime($this->exampleDateTimeString)), 'xml');
+        $actualXml = $xmlEncoder->encode(['dateTime' => new \DateTime($this->exampleDateTimeString)], 'xml');
 
         $this->assertEquals($this->createXmlWithDateTime(), $actualXml);
     }
@@ -789,7 +789,7 @@ XML;
     {
         $xmlEncoder = $this->createXmlEncoderWithDateTimeNormalizer();
 
-        $actualXml = $xmlEncoder->encode(array('foo' => array('@dateTime' => new \DateTime($this->exampleDateTimeString))), 'xml');
+        $actualXml = $xmlEncoder->encode(['foo' => ['@dateTime' => new \DateTime($this->exampleDateTimeString)]], 'xml');
 
         $this->assertEquals($this->createXmlWithDateTimeField(), $actualXml);
     }
@@ -802,7 +802,7 @@ XML;
 
 XML;
 
-        $data = array('#comment' => ' foo ');
+        $data = ['#comment' => ' foo '];
 
         $this->assertEquals($expected, $this->encoder->encode($data, 'xml'));
     }
@@ -820,17 +820,17 @@ XML;
     private function doTestEncodeWithoutPi(bool $legacy = false)
     {
         if ($legacy) {
-            $encoder = new XmlEncoder('response', null, array(), array(XML_PI_NODE));
+            $encoder = new XmlEncoder('response', null, [], [XML_PI_NODE]);
         } else {
-            $encoder = new XmlEncoder(array(
+            $encoder = new XmlEncoder([
                 XmlEncoder::ROOT_NODE_NAME => 'response',
-                XmlEncoder::ENCODER_IGNORED_NODE_TYPES => array(XML_PI_NODE),
-            ));
+                XmlEncoder::ENCODER_IGNORED_NODE_TYPES => [XML_PI_NODE],
+            ]);
         }
 
         $expected = '<response/>';
 
-        $this->assertEquals($expected, $encoder->encode(array(), 'xml'));
+        $this->assertEquals($expected, $encoder->encode([], 'xml'));
     }
 
     public function testEncodeWithoutComment()
@@ -846,12 +846,12 @@ XML;
     private function doTestEncodeWithoutComment(bool $legacy = false)
     {
         if ($legacy) {
-            $encoder = new XmlEncoder('response', null, array(), array(XML_COMMENT_NODE));
+            $encoder = new XmlEncoder('response', null, [], [XML_COMMENT_NODE]);
         } else {
-            $encoder = new XmlEncoder(array(
+            $encoder = new XmlEncoder([
                 XmlEncoder::ROOT_NODE_NAME => 'response',
-                XmlEncoder::ENCODER_IGNORED_NODE_TYPES => array(XML_COMMENT_NODE),
-            ));
+                XmlEncoder::ENCODER_IGNORED_NODE_TYPES => [XML_COMMENT_NODE],
+            ]);
         }
 
         $expected = <<<'XML'
@@ -860,7 +860,7 @@ XML;
 
 XML;
 
-        $data = array('#comment' => ' foo ');
+        $data = ['#comment' => ' foo '];
 
         $this->assertEquals($expected, $encoder->encode($data, 'xml'));
     }
@@ -871,7 +871,7 @@ XML;
     private function createXmlEncoderWithDateTimeNormalizer()
     {
         $encoder = new XmlEncoder();
-        $serializer = new Serializer(array($this->createMockDateTimeNormalizer()), array('xml' => new XmlEncoder()));
+        $serializer = new Serializer([$this->createMockDateTimeNormalizer()], ['xml' => new XmlEncoder()]);
         $encoder->setSerializer($serializer);
 
         return $encoder;
@@ -887,7 +887,7 @@ XML;
         $mock
             ->expects($this->once())
             ->method('normalize')
-            ->with(new \DateTime($this->exampleDateTimeString), 'xml', array())
+            ->with(new \DateTime($this->exampleDateTimeString), 'xml', [])
             ->willReturn($this->exampleDateTimeString);
 
         $mock
diff --git a/src/Symfony/Component/Serializer/Tests/Encoder/YamlEncoderTest.php b/src/Symfony/Component/Serializer/Tests/Encoder/YamlEncoderTest.php
index 69d577fc41..2c4e2bf112 100644
--- a/src/Symfony/Component/Serializer/Tests/Encoder/YamlEncoderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Encoder/YamlEncoderTest.php
@@ -27,7 +27,7 @@ class YamlEncoderTest extends TestCase
         $encoder = new YamlEncoder();
 
         $this->assertEquals('foo', $encoder->encode('foo', 'yaml'));
-        $this->assertEquals('{ foo: 1 }', $encoder->encode(array('foo' => 1), 'yaml'));
+        $this->assertEquals('{ foo: 1 }', $encoder->encode(['foo' => 1], 'yaml'));
     }
 
     public function testSupportsEncoding()
@@ -44,7 +44,7 @@ class YamlEncoderTest extends TestCase
         $encoder = new YamlEncoder();
 
         $this->assertEquals('foo', $encoder->decode('foo', 'yaml'));
-        $this->assertEquals(array('foo' => 1), $encoder->decode('{ foo: 1 }', 'yaml'));
+        $this->assertEquals(['foo' => 1], $encoder->decode('{ foo: 1 }', 'yaml'));
     }
 
     public function testSupportsDecoding()
@@ -58,16 +58,16 @@ class YamlEncoderTest extends TestCase
 
     public function testContext()
     {
-        $encoder = new YamlEncoder(new Dumper(), new Parser(), array('yaml_inline' => 1, 'yaml_indent' => 4, 'yaml_flags' => Yaml::DUMP_OBJECT | Yaml::PARSE_OBJECT));
+        $encoder = new YamlEncoder(new Dumper(), new Parser(), ['yaml_inline' => 1, 'yaml_indent' => 4, 'yaml_flags' => Yaml::DUMP_OBJECT | Yaml::PARSE_OBJECT]);
 
         $obj = new \stdClass();
         $obj->bar = 2;
 
         $legacyTag = "    foo: !php/object:O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}\n";
         $spacedTag = "    foo: !php/object 'O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}'\n";
-        $this->assertThat($encoder->encode(array('foo' => $obj), 'yaml'), $this->logicalOr($this->equalTo($legacyTag), $this->equalTo($spacedTag)));
-        $this->assertEquals('  { foo: null }', $encoder->encode(array('foo' => $obj), 'yaml', array('yaml_inline' => 0, 'yaml_indent' => 2, 'yaml_flags' => 0)));
-        $this->assertEquals(array('foo' => $obj), $encoder->decode("foo: !php/object 'O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}'", 'yaml'));
-        $this->assertEquals(array('foo' => null), $encoder->decode("foo: !php/object 'O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}'", 'yaml', array('yaml_flags' => 0)));
+        $this->assertThat($encoder->encode(['foo' => $obj], 'yaml'), $this->logicalOr($this->equalTo($legacyTag), $this->equalTo($spacedTag)));
+        $this->assertEquals('  { foo: null }', $encoder->encode(['foo' => $obj], 'yaml', ['yaml_inline' => 0, 'yaml_indent' => 2, 'yaml_flags' => 0]));
+        $this->assertEquals(['foo' => $obj], $encoder->decode("foo: !php/object 'O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}'", 'yaml'));
+        $this->assertEquals(['foo' => null], $encoder->decode("foo: !php/object 'O:8:\"stdClass\":1:{s:3:\"bar\";i:2;}'", 'yaml', ['yaml_flags' => 0]));
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/AbstractNormalizerDummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/AbstractNormalizerDummy.php
index 27b2f24f53..f576a241a4 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/AbstractNormalizerDummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/AbstractNormalizerDummy.php
@@ -31,7 +31,7 @@ class AbstractNormalizerDummy extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
     }
 
@@ -46,7 +46,7 @@ class AbstractNormalizerDummy extends AbstractNormalizer
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
     }
 
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/DenormalizableDummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/DenormalizableDummy.php
index d78f34a3cd..ded194ba80 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/DenormalizableDummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/DenormalizableDummy.php
@@ -16,7 +16,7 @@ use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 
 class DenormalizableDummy implements DenormalizableInterface
 {
-    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array())
+    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = [])
     {
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/Dummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/Dummy.php
index 3f4582559e..bb734ddc7e 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/Dummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/Dummy.php
@@ -23,17 +23,17 @@ class Dummy implements NormalizableInterface, DenormalizableInterface
     public $baz;
     public $qux;
 
-    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = array())
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
-        return array(
+        return [
             'foo' => $this->foo,
             'bar' => $this->bar,
             'baz' => $this->baz,
             'qux' => $this->qux,
-        );
+        ];
     }
 
-    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array())
+    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = [])
     {
         $this->foo = $data['foo'];
         $this->bar = $data['bar'];
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php
index 6d89890b8f..958200fdc7 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/JsonSerializableDummy.php
@@ -15,11 +15,11 @@ class JsonSerializableDummy implements \JsonSerializable
 {
     public function jsonSerialize()
     {
-        return array(
+        return [
             'foo' => 'a',
             'bar' => 'b',
             'baz' => 'c',
             'qux' => $this,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/NormalizableTraversableDummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/NormalizableTraversableDummy.php
index a786fa1cc1..2ce2adffd7 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/NormalizableTraversableDummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/NormalizableTraversableDummy.php
@@ -18,19 +18,19 @@ use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
 class NormalizableTraversableDummy extends TraversableDummy implements NormalizableInterface, DenormalizableInterface
 {
-    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = array())
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
-        return array(
+        return [
             'foo' => 'normalizedFoo',
             'bar' => 'normalizedBar',
-        );
+        ];
     }
 
-    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array())
+    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = [])
     {
-        return array(
+        return [
             'foo' => 'denormalizedFoo',
             'bar' => 'denormalizedBar',
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Fixtures/ScalarDummy.php b/src/Symfony/Component/Serializer/Tests/Fixtures/ScalarDummy.php
index fb45e12c65..438a902e23 100644
--- a/src/Symfony/Component/Serializer/Tests/Fixtures/ScalarDummy.php
+++ b/src/Symfony/Component/Serializer/Tests/Fixtures/ScalarDummy.php
@@ -21,12 +21,12 @@ class ScalarDummy implements NormalizableInterface, DenormalizableInterface
     public $foo;
     public $xmlFoo;
 
-    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = array())
+    public function normalize(NormalizerInterface $normalizer, $format = null, array $context = [])
     {
         return 'xml' === $format ? $this->xmlFoo : $this->foo;
     }
 
-    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = array())
+    public function denormalize(DenormalizerInterface $denormalizer, $data, $format = null, array $context = [])
     {
         if ('xml' === $format) {
             $this->xmlFoo = $data;
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
index d3fbb6a34d..9102374fd3 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/AttributeMetadataTest.php
@@ -38,7 +38,7 @@ class AttributeMetadataTest extends TestCase
         $attributeMetadata->addGroup('a');
         $attributeMetadata->addGroup('b');
 
-        $this->assertEquals(array('a', 'b'), $attributeMetadata->getGroups());
+        $this->assertEquals(['a', 'b'], $attributeMetadata->getGroups());
     }
 
     public function testMaxDepth()
@@ -71,7 +71,7 @@ class AttributeMetadataTest extends TestCase
 
         $attributeMetadata1->merge($attributeMetadata2);
 
-        $this->assertEquals(array('a', 'b', 'c'), $attributeMetadata1->getGroups());
+        $this->assertEquals(['a', 'b', 'c'], $attributeMetadata1->getGroups());
         $this->assertEquals(2, $attributeMetadata1->getMaxDepth());
         $this->assertEquals('a3', $attributeMetadata1->getSerializedName());
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php
index 68a092d701..fea1dc6e8f 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/ClassDiscriminatorMappingTest.php
@@ -23,9 +23,9 @@ class ClassDiscriminatorMappingTest extends TestCase
 {
     public function testGetClass()
     {
-        $mapping = new ClassDiscriminatorMapping('type', array(
+        $mapping = new ClassDiscriminatorMapping('type', [
             'first' => AbstractDummyFirstChild::class,
-        ));
+        ]);
 
         $this->assertEquals(AbstractDummyFirstChild::class, $mapping->getClassForType('first'));
         $this->assertNull($mapping->getClassForType('second'));
@@ -33,9 +33,9 @@ class ClassDiscriminatorMappingTest extends TestCase
 
     public function testMappedObjectType()
     {
-        $mapping = new ClassDiscriminatorMapping('type', array(
+        $mapping = new ClassDiscriminatorMapping('type', [
             'first' => AbstractDummyFirstChild::class,
-        ));
+        ]);
 
         $this->assertEquals('first', $mapping->getMappedObjectType(new AbstractDummyFirstChild()));
         $this->assertNull($mapping->getMappedObjectType(new AbstractDummySecondChild()));
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
index f2db1c51f6..f62967935d 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/ClassMetadataTest.php
@@ -38,7 +38,7 @@ class ClassMetadataTest extends TestCase
         $classMetadata->addAttributeMetadata($a1);
         $classMetadata->addAttributeMetadata($a2);
 
-        $this->assertEquals(array('a1' => $a1, 'a2' => $a2), $classMetadata->getAttributesMetadata());
+        $this->assertEquals(['a1' => $a1, 'a2' => $a2], $classMetadata->getAttributesMetadata());
     }
 
     public function testMerge()
@@ -48,11 +48,11 @@ class ClassMetadataTest extends TestCase
 
         $ac1 = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\AttributeMetadataInterface')->getMock();
         $ac1->method('getName')->willReturn('a1');
-        $ac1->method('getGroups')->willReturn(array('a', 'b'));
+        $ac1->method('getGroups')->willReturn(['a', 'b']);
 
         $ac2 = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\AttributeMetadataInterface')->getMock();
         $ac2->method('getName')->willReturn('a1');
-        $ac2->method('getGroups')->willReturn(array('b', 'c'));
+        $ac2->method('getGroups')->willReturn(['b', 'c']);
 
         $classMetadata1->addAttributeMetadata($ac1);
         $classMetadata2->addAttributeMetadata($ac2);
@@ -61,7 +61,7 @@ class ClassMetadataTest extends TestCase
 
         $ac1->method('getGroups')->willReturn('a', 'b', 'c');
 
-        $this->assertEquals(array('a1' => $ac1), $classMetadata2->getAttributesMetadata());
+        $this->assertEquals(['a1' => $ac1], $classMetadata2->getAttributesMetadata());
     }
 
     public function testSerialize()
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
index 15aa621c29..db0e887fb5 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Factory/ClassMetadataFactoryTest.php
@@ -25,7 +25,7 @@ class ClassMetadataFactoryTest extends TestCase
 {
     public function testInterface()
     {
-        $classMetadata = new ClassMetadataFactory(new LoaderChain(array()));
+        $classMetadata = new ClassMetadataFactory(new LoaderChain([]));
         $this->assertInstanceOf('Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactoryInterface', $classMetadata);
     }
 
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
index f3148fda28..c042b15f89 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/AnnotationLoaderTest.php
@@ -62,10 +62,10 @@ class AnnotationLoaderTest extends TestCase
         $classMetadata = new ClassMetadata(AbstractDummy::class);
         $this->loader->loadClassMetadata($classMetadata);
 
-        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', array(
+        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', [
             'first' => AbstractDummyFirstChild::class,
             'second' => AbstractDummySecondChild::class,
-        )));
+        ]));
 
         $expected->addAttributeMetadata(new AttributeMetadata('foo'));
         $expected->getReflectionClass();
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
index 1436403522..13634a63ab 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/XmlFileLoaderTest.php
@@ -83,10 +83,10 @@ class XmlFileLoaderTest extends TestCase
         $classMetadata = new ClassMetadata(AbstractDummy::class);
         $this->loader->loadClassMetadata($classMetadata);
 
-        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', array(
+        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', [
             'first' => AbstractDummyFirstChild::class,
             'second' => AbstractDummySecondChild::class,
-        )));
+        ]));
 
         $expected->addAttributeMetadata(new AttributeMetadata('foo'));
 
diff --git a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
index a463936825..78e3891bb3 100644
--- a/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Mapping/Loader/YamlFileLoaderTest.php
@@ -98,10 +98,10 @@ class YamlFileLoaderTest extends TestCase
         $classMetadata = new ClassMetadata(AbstractDummy::class);
         $this->loader->loadClassMetadata($classMetadata);
 
-        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', array(
+        $expected = new ClassMetadata(AbstractDummy::class, new ClassDiscriminatorMapping('type', [
             'first' => AbstractDummyFirstChild::class,
             'second' => AbstractDummySecondChild::class,
-        )));
+        ]));
 
         $expected->addAttributeMetadata(new AttributeMetadata('foo'));
 
diff --git a/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php b/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
index b0dec51839..4847004c97 100644
--- a/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
+++ b/src/Symfony/Component/Serializer/Tests/NameConverter/CamelCaseToSnakeCaseNameConverterTest.php
@@ -45,13 +45,13 @@ class CamelCaseToSnakeCaseNameConverterTest extends TestCase
 
     public function attributeProvider()
     {
-        return array(
-            array('coop_tilleuls', 'coopTilleuls', true),
-            array('_kevin_dunglas', '_kevinDunglas', true),
-            array('this_is_a_test', 'thisIsATest', true),
-            array('coop_tilleuls', 'CoopTilleuls', false),
-            array('_kevin_dunglas', '_kevinDunglas', false),
-            array('this_is_a_test', 'ThisIsATest', false),
-        );
+        return [
+            ['coop_tilleuls', 'coopTilleuls', true],
+            ['_kevin_dunglas', '_kevinDunglas', true],
+            ['this_is_a_test', 'thisIsATest', true],
+            ['coop_tilleuls', 'CoopTilleuls', false],
+            ['_kevin_dunglas', '_kevinDunglas', false],
+            ['this_is_a_test', 'ThisIsATest', false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/NameConverter/MetadataAwareNameConverterTest.php b/src/Symfony/Component/Serializer/Tests/NameConverter/MetadataAwareNameConverterTest.php
index 40fbc396f6..f4c5c5b305 100644
--- a/src/Symfony/Component/Serializer/Tests/NameConverter/MetadataAwareNameConverterTest.php
+++ b/src/Symfony/Component/Serializer/Tests/NameConverter/MetadataAwareNameConverterTest.php
@@ -98,19 +98,19 @@ final class MetadataAwareNameConverterTest extends TestCase
 
     public function attributeProvider()
     {
-        return array(
-            array('foo', 'baz'),
-            array('bar', 'qux'),
-            array('quux', 'quux'),
-        );
+        return [
+            ['foo', 'baz'],
+            ['bar', 'qux'],
+            ['quux', 'quux'],
+        ];
     }
 
     public function fallbackAttributeProvider()
     {
-        return array(
-            array('foo', 'baz'),
-            array('bar', 'qux'),
-            array('quux', 'QUUX'),
-        );
+        return [
+            ['foo', 'baz'],
+            ['bar', 'qux'],
+            ['quux', 'QUUX'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
index 46f5bb46f2..fbf33aa7c6 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractNormalizerTest.php
@@ -33,8 +33,8 @@ class AbstractNormalizerTest extends TestCase
 
     protected function setUp()
     {
-        $loader = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\Loader\LoaderChain')->setConstructorArgs(array(array()))->getMock();
-        $this->classMetadata = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory')->setConstructorArgs(array($loader))->getMock();
+        $loader = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\Loader\LoaderChain')->setConstructorArgs([[]])->getMock();
+        $this->classMetadata = $this->getMockBuilder('Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory')->setConstructorArgs([$loader])->getMock();
         $this->normalizer = new AbstractNormalizerDummy($this->classMetadata);
     }
 
@@ -60,11 +60,11 @@ class AbstractNormalizerTest extends TestCase
 
         $this->classMetadata->method('getMetadataFor')->willReturn($classMetadata);
 
-        $result = $this->normalizer->getAllowedAttributes('c', array(AbstractNormalizer::GROUPS => array('test')), true);
-        $this->assertEquals(array('a2', 'a4'), $result);
+        $result = $this->normalizer->getAllowedAttributes('c', [AbstractNormalizer::GROUPS => ['test']], true);
+        $this->assertEquals(['a2', 'a4'], $result);
 
-        $result = $this->normalizer->getAllowedAttributes('c', array(AbstractNormalizer::GROUPS => array('other')), true);
-        $this->assertEquals(array('a3', 'a4'), $result);
+        $result = $this->normalizer->getAllowedAttributes('c', [AbstractNormalizer::GROUPS => ['other']], true);
+        $this->assertEquals(['a3', 'a4'], $result);
     }
 
     public function testGetAllowedAttributesAsObjects()
@@ -89,24 +89,24 @@ class AbstractNormalizerTest extends TestCase
 
         $this->classMetadata->method('getMetadataFor')->willReturn($classMetadata);
 
-        $result = $this->normalizer->getAllowedAttributes('c', array(AbstractNormalizer::GROUPS => array('test')), false);
-        $this->assertEquals(array($a2, $a4), $result);
+        $result = $this->normalizer->getAllowedAttributes('c', [AbstractNormalizer::GROUPS => ['test']], false);
+        $this->assertEquals([$a2, $a4], $result);
 
-        $result = $this->normalizer->getAllowedAttributes('c', array(AbstractNormalizer::GROUPS => 'test'), false);
-        $this->assertEquals(array($a2, $a4), $result);
+        $result = $this->normalizer->getAllowedAttributes('c', [AbstractNormalizer::GROUPS => 'test'], false);
+        $this->assertEquals([$a2, $a4], $result);
 
-        $result = $this->normalizer->getAllowedAttributes('c', array(AbstractNormalizer::GROUPS => array('other')), false);
-        $this->assertEquals(array($a3, $a4), $result);
+        $result = $this->normalizer->getAllowedAttributes('c', [AbstractNormalizer::GROUPS => ['other']], false);
+        $this->assertEquals([$a3, $a4], $result);
     }
 
     public function testObjectToPopulateWithProxy()
     {
         $proxyDummy = new ProxyDummy();
 
-        $context = array(AbstractNormalizer::OBJECT_TO_POPULATE => $proxyDummy);
+        $context = [AbstractNormalizer::OBJECT_TO_POPULATE => $proxyDummy];
 
         $normalizer = new ObjectNormalizer();
-        $normalizer->denormalize(array('foo' => 'bar'), 'Symfony\Component\Serializer\Tests\Fixtures\ToBeProxyfiedDummy', null, $context);
+        $normalizer->denormalize(['foo' => 'bar'], 'Symfony\Component\Serializer\Tests\Fixtures\ToBeProxyfiedDummy', null, $context);
 
         $this->assertSame('bar', $proxyDummy->getFoo());
     }
@@ -114,7 +114,7 @@ class AbstractNormalizerTest extends TestCase
     public function testObjectWithStaticConstructor()
     {
         $normalizer = new StaticConstructorNormalizer();
-        $dummy = $normalizer->denormalize(array('foo' => 'baz'), StaticConstructorDummy::class);
+        $dummy = $normalizer->denormalize(['foo' => 'baz'], StaticConstructorDummy::class);
 
         $this->assertInstanceOf(StaticConstructorDummy::class, $dummy);
         $this->assertEquals('baz', $dummy->quz);
@@ -127,7 +127,7 @@ class AbstractNormalizerTest extends TestCase
     public function testObjectWithNullableConstructorArgument()
     {
         $normalizer = new ObjectNormalizer();
-        $dummy = $normalizer->denormalize(array('foo' => null), NullableConstructorArgumentDummy::class);
+        $dummy = $normalizer->denormalize(['foo' => null], NullableConstructorArgumentDummy::class);
 
         $this->assertNull($dummy->getFoo());
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
index 91c6968295..a45009d233 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/AbstractObjectNormalizerTest.php
@@ -29,7 +29,7 @@ class AbstractObjectNormalizerTest extends TestCase
     public function testDenormalize()
     {
         $normalizer = new AbstractObjectNormalizerDummy();
-        $normalizedData = $normalizer->denormalize(array('foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz'), __NAMESPACE__.'\Dummy');
+        $normalizedData = $normalizer->denormalize(['foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz'], __NAMESPACE__.'\Dummy');
 
         $this->assertSame('foo', $normalizedData->foo);
         $this->assertNull($normalizedData->bar);
@@ -38,13 +38,13 @@ class AbstractObjectNormalizerTest extends TestCase
 
     public function testInstantiateObjectDenormalizer()
     {
-        $data = array('foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz');
+        $data = ['foo' => 'foo', 'bar' => 'bar', 'baz' => 'baz'];
         $class = __NAMESPACE__.'\Dummy';
-        $context = array();
+        $context = [];
 
         $normalizer = new AbstractObjectNormalizerDummy();
 
-        $this->assertInstanceOf(__NAMESPACE__.'\Dummy', $normalizer->instantiateObject($data, $class, $context, new \ReflectionClass($class), array()));
+        $this->assertInstanceOf(__NAMESPACE__.'\Dummy', $normalizer->instantiateObject($data, $class, $context, new \ReflectionClass($class), []));
     }
 
     /**
@@ -56,10 +56,10 @@ class AbstractObjectNormalizerTest extends TestCase
         $factory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
         $normalizer = new AbstractObjectNormalizerDummy($factory);
         $normalizer->denormalize(
-            array('fooFoo' => 'foo', 'fooBar' => 'bar'),
+            ['fooFoo' => 'foo', 'fooBar' => 'bar'],
             __NAMESPACE__.'\Dummy',
             'any',
-            array('allow_extra_attributes' => false)
+            ['allow_extra_attributes' => false]
         );
     }
 
@@ -71,10 +71,10 @@ class AbstractObjectNormalizerTest extends TestCase
     {
         $normalizer = new AbstractObjectNormalizerWithMetadata();
         $normalizer->denormalize(
-            array('fooFoo' => 'foo', 'fooBar' => 'bar', 'bar' => 'bar'),
+            ['fooFoo' => 'foo', 'fooBar' => 'bar', 'bar' => 'bar'],
             Dummy::class,
             'any',
-            array('allow_extra_attributes' => false)
+            ['allow_extra_attributes' => false]
         );
     }
 
@@ -83,11 +83,11 @@ class AbstractObjectNormalizerTest extends TestCase
         $denormalizer = $this->getDenormalizerForDummyCollection();
 
         $dummyCollection = $denormalizer->denormalize(
-            array(
-                'children' => array(
+            [
+                'children' => [
                     'bar' => 'first',
-                ),
-            ),
+                ],
+            ],
             DummyCollection::class,
             'xml'
         );
@@ -103,12 +103,12 @@ class AbstractObjectNormalizerTest extends TestCase
         $denormalizer = $this->getDenormalizerForDummyCollection();
 
         $dummyCollection = $denormalizer->denormalize(
-            array(
-                'children' => array(
-                    array('bar' => 'first'),
-                    array('bar' => 'second'),
-                ),
-            ),
+            [
+                'children' => [
+                    ['bar' => 'first'],
+                    ['bar' => 'second'],
+                ],
+            ],
             DummyCollection::class,
             'xml'
         );
@@ -125,7 +125,7 @@ class AbstractObjectNormalizerTest extends TestCase
         $extractor = $this->getMockBuilder(PhpDocExtractor::class)->getMock();
         $extractor->method('getTypes')
             ->will($this->onConsecutiveCalls(
-                array(
+                [
                     new Type(
                         'array',
                         false,
@@ -134,13 +134,13 @@ class AbstractObjectNormalizerTest extends TestCase
                         new Type('int'),
                         new Type('object', false, DummyChild::class)
                     ),
-                ),
+                ],
                 null
             ));
 
         $denormalizer = new AbstractObjectNormalizerCollectionDummy(null, null, $extractor);
         $arrayDenormalizer = new ArrayDenormalizerDummy();
-        $serializer = new SerializerCollectionDummy(array($arrayDenormalizer, $denormalizer));
+        $serializer = new SerializerCollectionDummy([$arrayDenormalizer, $denormalizer]);
         $arrayDenormalizer->setSerializer($serializer);
         $denormalizer->setSerializer($serializer);
 
@@ -157,9 +157,9 @@ class AbstractObjectNormalizerTest extends TestCase
     {
         $normalizer = new ObjectNormalizer();
 
-        $normalizer->denormalize(array(), \stdClass::class, 'xml', array(
+        $normalizer->denormalize([], \stdClass::class, 'xml', [
             'allow_extra_attributes' => false,
-        ));
+        ]);
     }
 
     public function testSkipNullValues()
@@ -168,29 +168,29 @@ class AbstractObjectNormalizerTest extends TestCase
         $dummy->bar = 'present';
 
         $normalizer = new ObjectNormalizer();
-        $result = $normalizer->normalize($dummy, null, array(AbstractObjectNormalizer::SKIP_NULL_VALUES => true));
-        $this->assertSame(array('bar' => 'present'), $result);
+        $result = $normalizer->normalize($dummy, null, [AbstractObjectNormalizer::SKIP_NULL_VALUES => true]);
+        $this->assertSame(['bar' => 'present'], $result);
     }
 }
 
 class AbstractObjectNormalizerDummy extends AbstractObjectNormalizer
 {
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
     }
 
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
     }
 
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         $object->$attribute = $value;
     }
 
-    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
+    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = [])
     {
-        return \in_array($attribute, array('foo', 'baz'));
+        return \in_array($attribute, ['foo', 'baz']);
     }
 
     public function instantiateObject(array &$data, $class, array &$context, \ReflectionClass $reflectionClass, $allowedAttributes, string $format = null)
@@ -213,15 +213,15 @@ class AbstractObjectNormalizerWithMetadata extends AbstractObjectNormalizer
         parent::__construct(new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader())));
     }
 
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
     }
 
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
     }
 
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         $object->$attribute = $value;
     }
@@ -250,15 +250,15 @@ class SerializerCollectionDummy implements SerializerInterface, DenormalizerInte
         $this->normalizers = $normalizers;
     }
 
-    public function serialize($data, $format, array $context = array())
+    public function serialize($data, $format, array $context = [])
     {
     }
 
-    public function deserialize($data, $type, $format, array $context = array())
+    public function deserialize($data, $type, $format, array $context = [])
     {
     }
 
-    public function denormalize($data, $type, $format = null, array $context = array())
+    public function denormalize($data, $type, $format = null, array $context = [])
     {
         foreach ($this->normalizers as $normalizer) {
             if ($normalizer instanceof DenormalizerInterface && $normalizer->supportsDenormalization($data, $type, $format, $context)) {
@@ -275,20 +275,20 @@ class SerializerCollectionDummy implements SerializerInterface, DenormalizerInte
 
 class AbstractObjectNormalizerCollectionDummy extends AbstractObjectNormalizer
 {
-    protected function extractAttributes($object, $format = null, array $context = array())
+    protected function extractAttributes($object, $format = null, array $context = [])
     {
     }
 
-    protected function getAttributeValue($object, $attribute, $format = null, array $context = array())
+    protected function getAttributeValue($object, $attribute, $format = null, array $context = [])
     {
     }
 
-    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = array())
+    protected function setAttributeValue($object, $attribute, $value, $format = null, array $context = [])
     {
         $object->$attribute = $value;
     }
 
-    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
+    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = [])
     {
         return true;
     }
@@ -298,11 +298,11 @@ class AbstractObjectNormalizerCollectionDummy extends AbstractObjectNormalizer
         return parent::instantiateObject($data, $class, $context, $reflectionClass, $allowedAttributes, $format);
     }
 
-    public function serialize($data, $format, array $context = array())
+    public function serialize($data, $format, array $context = [])
     {
     }
 
-    public function deserialize($data, $type, $format, array $context = array())
+    public function deserialize($data, $type, $format, array $context = [])
     {
     }
 }
@@ -319,7 +319,7 @@ class ArrayDenormalizerDummy implements DenormalizerInterface, SerializerAwareIn
      *
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
         $serializer = $this->serializer;
         $class = substr($class, 0, -2);
@@ -334,7 +334,7 @@ class ArrayDenormalizerDummy implements DenormalizerInterface, SerializerAwareIn
     /**
      * {@inheritdoc}
      */
-    public function supportsDenormalization($data, $type, $format = null, array $context = array())
+    public function supportsDenormalization($data, $type, $format = null, array $context = [])
     {
         return '[]' === substr($type, -2)
             && $this->serializer->supportsDenormalization($data, substr($type, 0, -2), $format, $context);
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
index e5876a04e1..fd456cb9dd 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ArrayDenormalizerTest.php
@@ -38,27 +38,27 @@ class ArrayDenormalizerTest extends TestCase
     {
         $this->serializer->expects($this->at(0))
             ->method('denormalize')
-            ->with(array('foo' => 'one', 'bar' => 'two'))
+            ->with(['foo' => 'one', 'bar' => 'two'])
             ->will($this->returnValue(new ArrayDummy('one', 'two')));
 
         $this->serializer->expects($this->at(1))
             ->method('denormalize')
-            ->with(array('foo' => 'three', 'bar' => 'four'))
+            ->with(['foo' => 'three', 'bar' => 'four'])
             ->will($this->returnValue(new ArrayDummy('three', 'four')));
 
         $result = $this->denormalizer->denormalize(
-            array(
-                array('foo' => 'one', 'bar' => 'two'),
-                array('foo' => 'three', 'bar' => 'four'),
-            ),
+            [
+                ['foo' => 'one', 'bar' => 'two'],
+                ['foo' => 'three', 'bar' => 'four'],
+            ],
             __NAMESPACE__.'\ArrayDummy[]'
         );
 
         $this->assertEquals(
-            array(
+            [
                 new ArrayDummy('one', 'two'),
                 new ArrayDummy('three', 'four'),
-            ),
+            ],
             $result
         );
     }
@@ -72,10 +72,10 @@ class ArrayDenormalizerTest extends TestCase
 
         $this->assertTrue(
             $this->denormalizer->supportsDenormalization(
-                array(
-                    array('foo' => 'one', 'bar' => 'two'),
-                    array('foo' => 'three', 'bar' => 'four'),
-                ),
+                [
+                    ['foo' => 'one', 'bar' => 'two'],
+                    ['foo' => 'three', 'bar' => 'four'],
+                ],
                 __NAMESPACE__.'\ArrayDummy[]'
             )
         );
@@ -89,10 +89,10 @@ class ArrayDenormalizerTest extends TestCase
 
         $this->assertFalse(
             $this->denormalizer->supportsDenormalization(
-                array(
-                    array('foo' => 'one', 'bar' => 'two'),
-                    array('foo' => 'three', 'bar' => 'four'),
-                ),
+                [
+                    ['foo' => 'one', 'bar' => 'two'],
+                    ['foo' => 'three', 'bar' => 'four'],
+                ],
                 __NAMESPACE__.'\InvalidClass[]'
             )
         );
@@ -102,7 +102,7 @@ class ArrayDenormalizerTest extends TestCase
     {
         $this->assertFalse(
             $this->denormalizer->supportsDenormalization(
-                array('foo' => 'one', 'bar' => 'two'),
+                ['foo' => 'one', 'bar' => 'two'],
                 __NAMESPACE__.'\ArrayDummy'
             )
         );
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ConstraintViolationListNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ConstraintViolationListNormalizerTest.php
index 9e8aec5147..fa406ff227 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ConstraintViolationListNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ConstraintViolationListNormalizerTest.php
@@ -37,29 +37,29 @@ class ConstraintViolationListNormalizerTest extends TestCase
 
     public function testNormalize()
     {
-        $list = new ConstraintViolationList(array(
-            new ConstraintViolation('a', 'b', array(), 'c', 'd', 'e', null, 'f'),
-            new ConstraintViolation('1', '2', array(), '3', '4', '5', null, '6'),
-        ));
+        $list = new ConstraintViolationList([
+            new ConstraintViolation('a', 'b', [], 'c', 'd', 'e', null, 'f'),
+            new ConstraintViolation('1', '2', [], '3', '4', '5', null, '6'),
+        ]);
 
-        $expected = array(
+        $expected = [
             'type' => 'https://symfony.com/errors/validation',
             'title' => 'Validation Failed',
             'detail' => 'd: a
 4: 1',
-            'violations' => array(
-                    array(
+            'violations' => [
+                    [
                         'propertyPath' => 'd',
                         'title' => 'a',
                         'type' => 'urn:uuid:f',
-                    ),
-                    array(
+                    ],
+                    [
                         'propertyPath' => '4',
                         'title' => '1',
                         'type' => 'urn:uuid:6',
-                    ),
-                ),
-        );
+                    ],
+                ],
+        ];
 
         $this->assertEquals($expected, $this->normalizer->normalize($list));
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
index 55378c773a..28fb73ece5 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/CustomNormalizerTest.php
@@ -59,9 +59,9 @@ class CustomNormalizerTest extends TestCase
     public function testDenormalizeWithObjectToPopulateUsesProvidedObject()
     {
         $expected = new ScalarDummy();
-        $obj = $this->normalizer->denormalize('foo', ScalarDummy::class, 'json', array(
+        $obj = $this->normalizer->denormalize('foo', ScalarDummy::class, 'json', [
             'object_to_populate' => $expected,
-        ));
+        ]);
 
         $this->assertSame($expected, $obj);
         $this->assertEquals('foo', $obj->foo);
@@ -76,8 +76,8 @@ class CustomNormalizerTest extends TestCase
 
     public function testSupportsDenormalization()
     {
-        $this->assertTrue($this->normalizer->supportsDenormalization(array(), 'Symfony\Component\Serializer\Tests\Fixtures\ScalarDummy'));
-        $this->assertFalse($this->normalizer->supportsDenormalization(array(), 'stdClass'));
-        $this->assertTrue($this->normalizer->supportsDenormalization(array(), 'Symfony\Component\Serializer\Tests\Fixtures\DenormalizableDummy'));
+        $this->assertTrue($this->normalizer->supportsDenormalization([], 'Symfony\Component\Serializer\Tests\Fixtures\ScalarDummy'));
+        $this->assertFalse($this->normalizer->supportsDenormalization([], 'stdClass'));
+        $this->assertTrue($this->normalizer->supportsDenormalization([], 'Symfony\Component\Serializer\Tests\Fixtures\DenormalizableDummy'));
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/DataUriNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/DataUriNormalizerTest.php
index e6bd915aeb..bb2ca64129 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/DataUriNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/DataUriNormalizerTest.php
@@ -131,19 +131,19 @@ class DataUriNormalizerTest extends TestCase
 
     public function invalidUriProvider()
     {
-        return array(
-            array('dataxbase64'),
-            array('data:HelloWorld'),
-            array('data:text/html;charset=,%3Ch1%3EHello!%3C%2Fh1%3E'),
-            array('data:text/html;charset,%3Ch1%3EHello!%3C%2Fh1%3E'),
-            array('data:base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'),
-            array(''),
-            array('http://wikipedia.org'),
-            array('base64'),
-            array('iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'),
-            array(' data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'),
-            array('   data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'),
-        );
+        return [
+            ['dataxbase64'],
+            ['data:HelloWorld'],
+            ['data:text/html;charset=,%3Ch1%3EHello!%3C%2Fh1%3E'],
+            ['data:text/html;charset,%3Ch1%3EHello!%3C%2Fh1%3E'],
+            ['data:base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'],
+            [''],
+            ['http://wikipedia.org'],
+            ['base64'],
+            ['iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'],
+            [' data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'],
+            ['   data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'],
+        ];
     }
 
     /**
@@ -156,19 +156,19 @@ class DataUriNormalizerTest extends TestCase
 
     public function validUriProvider()
     {
-        return array(
-            array('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'),
-            array('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'),
-            array('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC   '),
-            array('data:,Hello%2C%20World!'),
-            array('data:text/html,%3Ch1%3EHello%2C%20World!%3C%2Fh1%3E'),
-            array('data:,A%20brief%20note'),
-            array('data:text/html;charset=US-ASCII,%3Ch1%3EHello!%3C%2Fh1%3E'),
-            array('data:application/ld+json;base64,eyJAaWQiOiAiL2ZvbyJ9'),
-            array('data:application/vnd.ms-word.document.macroenabled.12;base64,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-            array('data:a!b#c&d-e^f_g+h.i/a!b#c&d-e^f_g+h.i;base64,foobar'),
-            array('data:text/plain;charset=utf-8;base64,SGVsbG8gV29ybGQh'),
-        );
+        return [
+            ['data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAABlBMVEUAAAD///+l2Z/dAAAAM0lEQVR4nGP4/5/h/1+G/58ZDrAz3D/McH8yw83NDDeNGe4Ug9C9zwz3gVLMDA/A6P9/AFGGFyjOXZtQAAAAAElFTkSuQmCC'],
+            ['data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC'],
+            ['data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAIBAMAAAA2IaO4AAAAFVBMVEXk5OTn5+ft7e319fX29vb5+fn///++GUmVAAAALUlEQVQIHWNICnYLZnALTgpmMGYIFWYIZTA2ZFAzTTFlSDFVMwVyQhmAwsYMAKDaBy0axX/iAAAAAElFTkSuQmCC   '],
+            ['data:,Hello%2C%20World!'],
+            ['data:text/html,%3Ch1%3EHello%2C%20World!%3C%2Fh1%3E'],
+            ['data:,A%20brief%20note'],
+            ['data:text/html;charset=US-ASCII,%3Ch1%3EHello!%3C%2Fh1%3E'],
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KACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoA/mXoA/9b+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1/7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/Q/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9H+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0v7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/T/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9T+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1f7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/W/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9f+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0P7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/R/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9L+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0/7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/U/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9X+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1v7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/X/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9D+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0f7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/S/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9P+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1P7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/V/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9b+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1/7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/Q/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9H+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0v7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/T/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9T+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1f7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/W/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9f+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0P7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/R/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9L+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0/7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/U/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9X+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1v7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/X/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9D+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0f7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/S/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9P+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1P7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/V/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9b+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1/7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/Q/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9H+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/0v7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/T/ur+Cn/JGvhJ/wBky8B/+orpVAHptABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQB/MvQB/9T+6v4Kf8ka+En/AGTLwH/6iulUAem0AFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAH8y9AH/1f7q/gp/yRr4Sf8AZMvAf/qK6VQB6bQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAfzL0Af/W/th+DHxn+D0Pwe+FEUvxX+GsUsXw18CxyRyeO/CySRyJ4X0tXR0bUgyOjAqysNysCDgg0Aelf8Lr+Df/AEVr4Zf+F74V/wDllQAf8Lr+Df8A0Vr4Zf8Ahe+Ff/llQAf8Lr+Df/RWvhl/4XvhX/5ZUAH/AAuv4N/9Fa+GX/he+Ff/AJZUAH/C6/g3/wBFa+GX/he+Ff8A5ZUAH/C6/g3/ANFa+GX/AIXvhX/5ZUAH/C6/g3/0Vr4Zf+F74V/+WVAB/wALr+Df/RWvhl/4XvhX/wCWVAB/wuv4N/8ARWvhl/4XvhX/AOWVAB/wuv4N/wDRWvhl/wCF74V/+WVAB/wuv4N/9Fa+GX/he+Ff/llQAf8AC6/g3/0Vr4Zf+F74V/8AllQAf8Lr+Df/AEVr4Zf+F74V/wDllQAf8Lr+Df8A0Vr4Zf8Ahe+Ff/llQAf8Lr+Df/RWvhl/4XvhX/5ZUAH/AAuv4N/9Fa+GX/he+Ff/AJZUAH/C6/g3/wBFa+GX/he+Ff8A5ZUAH/C6/g3/ANFa+GX/AIXvhX/5ZUAH/C6/g3/0Vr4Zf+F74V/+WVAB/wALr+Df/RWvhl/4XvhX/wCWVAB/wuv4N/8ARWvhl/4XvhX/AOWVAB/wuv4N/wDRWvhl/wCF74V/+WVAB/wuv4N/9Fa+GX/he+Ff/llQAf8AC6/g3/0Vr4Zf+F74V/8AllQAf8Lr+Df/AEVr4Zf+F74V/wDllQAf8Lr+Df8A0Vr4Zf8Ahe+Ff/llQAf8Lr+Df/RWvhl/4XvhX/5ZUAH/AAuv4N/9Fa+GX/he+Ff/AJZUAH/C6/g3/wBFa+GX/he+Ff8A5ZUAH/C6/g3/ANFa+GX/AIXvhX/5ZUAH/C6/g3/0Vr4Zf+F74V/+WVAB/wALr+Df/RWvhl/4XvhX/wCWVAB/wuv4N/8ARWvhl/4XvhX/AOWVAB/wuv4N/wDRWvhl/wCF74V/+WVAB/wuv4N/9Fa+GX/he+Ff/llQAf8AC6/g3/0Vr4Zf+F74V/8AllQAf8Lr+Df/AEVr4Zf+F74V/wDllQAf8Lr+Df8A0Vr4Zf8Ahe+Ff/llQAf8Lr+Df/RWvhl/4XvhX/5ZUAH/AAuv4N/9Fa+GX/he+Ff/AJZUAH/C6/g3/wBFa+GX/he+Ff8A5ZUAH/C6/g3/ANFa+GX/AIXvhX/5ZUAH/C6/g3/0Vr4Zf+F74V/+WVAB/wALr+Df/RWvhl/4XvhX/wCWVAH813/Cy/hz/wBFA8E/+FVoP/ydQB//2QAAUEsDBBQABgAIAAAAIQDSXhXfgQMAAEwJAAARAAAAd29yZC9zZXR0aW5ncy54bWy0Vltv2zYUfh/Q/2DouYolxXJdrU4RO/GaIl6D2H3ZGyVRNhFehEPKmjvsv++IFCNvDQp3Rf1i8nznzu8c+937PwUfHShopuQ8iC+iYERloUomd/Pg83YVzoKRNkSWhCtJ58GR6uD91atf3rWZpsagmh6hC6kzUcyDvTF1Nh7rYk8F0ReqphLBSoEgBq+wGwsCT00dFkrUxLCccWaO4ySKpkHvRs2DBmTWuwgFK0BpVZnOJFNVxQraf3kLOCeuM7lRRSOoNDbiGCjHHJTUe1Zr7038X28I7r2Tw7eKOAju9do4OqPcVkH5bHFOep1BDaqgWuMDCe4TZHIIPPnK0XPsC4zdl2hdoXkc2dNp5un3OUj+40Dzcypx0D3LgYDjSV+GKLK7nVRAco6sxHJGmFFwhbT8opQYtVlNocC3QU5PomDcASWtSMPNluQbo2pUORDM4U00c/D+WO+ptIT4A6nu8UmSOrzYEyCFobCpSYFtXSppQHGvV6rflVkirQG77iw0OdAHoAdG2wdWmAaoc2S5P5w2bo7QkSQCi/nXbKxViURvswbY+f3uDGxSsc/9xUAK5x5YSbddEzfmyOkKa9qwL/Ralh8bbRh6tA35gQy+lQC2GyN/wmffHmu6oqTrkf5JwewDrTir1wxAwZ0skR4/LRirKgoYgBFD18g6Bqq1ff5ASYnr9gfjjk9phMu71P7wqJTxqlF0GaXLdOky7dBzkPRNvEyTl5DbOJ29tdM0fo4qsm7xPYA/dRQaCWexJCIHRkbrbjWOO40cnhZMejynOOv0FNk0uQfD0AFaEM5XOHoesAmIrGS6vqGVPfM1gd3gt9eAF6W4Bj4+++pWBIXfQDW1Q1sgtaOGV4knboGIjElzz4SX6ybfeCuJ2+kEamT56QC2T0N72szgE9sRuyeWKla3gnD12FOJw6ajAV2TunZsynfxPOBstzdxRwCDtxJ/Qe0l3yU9llgscZi9kKKrDLX7wyBLvOxE79LLLgfZxMsmgyz1snSQTb1s2slwiVLgTD4hsf2xk1eKc9XS8sOAfyXyW7pg+OKbo8iH5fraYZxpnLQa97BR4LFfLRZPslIVd0hWPLl3i5LbWZIsHJza/W22yKMnbO0jrRZE07LHvGnqTP9adZ9Zsgiv45sknEzTRThLlrfhYpVcx8vrt9N0mfzdz4H/G3T1DwAAAP//AwBQSwMEFAAGAAgAAAAhAPC8NQHcAQAA8QUAABIAAAB3b3JkL2ZvbnRUYWJsZS54bWy8k9tq4zAQhu8LfQej+8ay4vRg6pQ0bWBh6cXSfQBFkW2xOhhJiTdvvyPZcQMhbJallUHI/4x+jT40j0+/lUx23DphdImyCUYJ18xshK5L9PN9dXOPEuep3lBpNC/Rnjv0NL++euyKymjvEtivXaFYiRrv2yJNHWu4om5iWq4hWBmrqIdfW6eK2l/b9oYZ1VIv1kIKv08JxrdosLGXuJiqEoy/GLZVXPu4P7VcgqPRrhGtO7h1l7h1xm5aaxh3Du6sZO+nqNCjTZafGCnBrHGm8hO4zFBRtILtGY4rJT8MZv9mQEYDxYpvtTaWriXAh0oSMEPzgX7SFZoqCCypFGsrYqCl2jieQWxHZYkwwSs8gzl8OZ6GGaUhkTXUOh5M+kTcyxVVQu4PKt160+ut8Kw5yDtqRaipDzlRQ2Dr1rhErxgGWa1Qr2QlykFYLEeFhKPiyAZlOio4KCz69BkPcReLPmMOnJn2AE5AvAvFXfLGu+SHUVSfAULwLYCYAY4AZvr5QMji9QjIEpS7+/xw/Q8gD38H0mO8HMgCypJnMDwDhnx4GfF1fD6G43cxYJh+BYahQZLvom782TYJzfFFbbIIFZPjVxHahOC75xMc8fL/2SbDws3/AAAA//8DAFBLAwQUAAYACAAAACEA4IvKVR8BAAARAgAAFAAAAHdvcmQvd2ViU2V0dGluZ3MueG1slNFRS8MwEAfwd8HvUPK+pRs6tKwbgkz2MgbVD5Cl1zWY5EIua7dv71nnRHyZbzku9+P+3Hx5dDbrIJJBX4rJOBcZeI218ftSvL2uRg8io6R8rSx6KMUJSCwXtzfzvuhhV0FK/JMyVjwVTpeiTSkUUpJuwSkaYwDPzQajU4nLuJdOxfdDGGl0QSWzM9akk5zm+UycmXiNgk1jNDyjPjjwaZiXESyL6Kk1gb61/hqtx1iHiBqIOI+zX55Txl+Yyd0fyBkdkbBJYw5z3migeHySDy9nf4D7/wHTC+B0sd57jGpn+QS8ScaYWPANlLXYbzcv8rOocYOpUh08UcUpLKyMhaETzBEsbSGuvW6zvuiULcXjTHBT/jrk4gMAAP//AwBQSwMEFAAGAAgAAAAhAJ/qVV97AQAAFQMAABEACAFkb2NQcm9wcy9jb3JlLnhtbCCiBAEooAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJySUU/CMBCA3038D0vfRzdQgssYiRqeJJoI0fhW2xtUtrZpDwb/3m6DIZHExLfe7ruvt7umk11ZBFuwTmo1JnEvIgEoroVUyzFZzKfhiAQOmRKs0ArGZA+OTLLrq5SbhGsLL1YbsCjBBd6kXMLNmKwQTUKp4ysomet5Qvlkrm3J0Id2SQ3ja7YE2o+iIS0BmWDIaC0MTWckB6XgndJsbNEIBKdQQAkKHY17MT2xCLZ0FwuazA+ylLg3cBE9Jjt652QHVlXVqwYN6vuP6fvs6bX51VCqelYcSJYKnqDEArKUno7+5DafX8Cx/dwF/swtMNQ2W6AspGMIGxsICGaSW+10jsFznksOTd2Rrbewhn2lrXDeeBZ5TIDjVhr0u23vO/vg6YI5nPll5xLE/f7vq3+X1BYLW1m/nyxuiC5MD8to2wUR+CEm7ciPmbfBw+N8SrJ+FA/DOAr7N/NolNzeJVH0UXd8Vn8SlocG/m08CtqhnT/k7BsAAP//AwBQSwMEFAAGAAgAAAAhAIGW/TkyCwAAZHIAAA8AAAB3b3JkL3N0eWxlcy54bWy8ndty27oVhu8703fg6Kq9cHyMnXi2s8d24tpTO9s7cppriIQk1CCh8uBDn74gSEmQF0FxAau+siVqfQDx4wewQFL67feXVEZPPC+Eys5G+x/2RhHPYpWIbHY2+vlwtfNpFBUlyxImVcbPRq+8GP3+5a9/+e35tChfJS8iDciK0zQ+G83LcnG6u1vEc56y4oNa8EwfnKo8ZaV+mc92U5Y/VoudWKULVoqJkKJ83T3Y2zsetZh8CEVNpyLmX1VcpTwrTfxuzqUmqqyYi0WxpD0PoT2rPFnkKuZFoU86lQ0vZSJbYfaPACgVca4KNS0/6JNpa2RQOnx/z/yXyjXgIw5wsAKk8enNLFM5m0jd+romkYaNvujmT1T8lU9ZJcuifpnf5+3L9pX5c6WysoieT1kRC/GgS9aQVGje9XlWiJE+wllRnheCdR6c1/90HomL0nr7QiRitFuXWPxXH3xi8mx0cLR857KuwcZ7kmWz5XvTfOfqh12TsxHPdn6O67cmmns2YvnO+LwO3G1PrPlrne5i9ar51Ju20V1Dd5Rx01/1UT69VfEjT8alPnA22quL0m/+vLnPhcp1nzwbff7cvjnmqbgWScIz64PZXCT815xnPwuerN//88r0q/aNWFWZ/v/w057RSxbJt5eYL+peqo9mrG6973WArD9diXXhJvw/S9h+22Zd8XPOaqtG+28RpvooxEEdUVhn282s3py7+RSqoMP3KujovQr6+F4FHb9XQSfvVdCn9yrIYP6fBYks4S+NEWExgLqN43AjmuMwG5rj8BKa47AKmuNwAprj6OhojqMfozmOborglCp29UKrsx86ens/d/sc4cfdPiX4cbfPAH7c7QO+H3f7+O7H3T6c+3G3j95+3O2DNZ7bLLWiG22zrAx22VSpMlMlj0r+Ek5jmWaZ/IWGV096PCc5SQJMM7K1E3EwLWbm9fYeYkzqP5+XdcoVqWk0FbMq12lvaMV59sSlTkAjliSaRwjMeVnljhbx6dM5n/KcZzGn7Nh0UCkyHmVVOiHomws2I2PxLCFuviWRZFBYdWhWlfPaJIKgU6cszlV41RQjGx9uRRHeVjUkuqik5ESs7zRdzLDCcwODCU8NDCY8MzCY8MTA0oyqiVoaUUu1NKIGa2lE7db0T6p2a2lE7dbSiNqtpYW324MopRni7VXH/vC9u0up6h3n4HqMxSxjegEQPt20e6bRPcvZLGeLeVTvH3dj7XPGlnOhktfogWJOW5Go1vWmi1zqsxZZFd6gGzQqc614RPZa8YgMtuKFW+xOL5PrBdo1TT4zriZlp2kNaZBpx0xWzYI23G2sDO9hawNcibwgs0E3lqAHf6+Xs7WcFCPfupbhFVuzwm31dlQirV6LJKilVPEjzTB8/brguU7LHoNJV0pK9cwTOuK4zFXT12zLHxhJBln+W7qYs0KYXGkDMXyqX16rju7YIviE7iUTGY1u33ZSJmREt4K4fri7jR7Uok4z64ahAV6oslQpGbPdCfzbLz75O00Fz3USnL0Sne050faQgV0KgkmmIamEiKSXmSITJHOo4f2Tv04UyxMa2n3Om9tDSk5EHLN00Sw6CLylx8VnPf4QrIYM718sF/W+EJWpHkhg1rZhUU3+zePwoe67ikh2hv6oSrP/aJa6JpoOF75M2MCFLxGMmnp6qPsvwclu4MJPdgNHdbKXkhWFcF5C9eZRne6SR32+4clfy1NS5dNK0jXgEkjWgksgWRMqWaVZQXnGhkd4woZHfb6EXcbwCLbkDO8fuUjIxDAwKiUMjEoGA6PSwMBIBQi/Q8eChd+mY8HC79VpYERLAAtG1c9Ip3+iqzwWjKqfGRhVPzMwqn5mYFT97PBrxKdTvQimm2IsJFWfs5B0E01W8nShcpa/EiG/ST5jBBukDe0+V9P6uQGVNTdxEyDrPWpJuNhucFQi/+ITsqrVLMp6EeyIMimVItpbW084JnLz3rVtYeaZi+AqmM32W/7EKVbjFozoMkADC5fNgoVPUxYsfJqyYOHTlAULn6YsWPg0ZcHC71++lyzmcyUTnjuM2FeRaLxgcXttCVyjHrRXfytm8zIaz1eXqGzM8d7WyOUu00bY9gK7Borjg56wO56IKl1WFD4BdHw4PNgYeiN4+aBWT/B6+bsR+XFgJCzzeHvkOrXbiDwZGAnL/DQw0oxSG5F9g/hXlj92doSTvv6z2phwdL6Tvl60Cu4stq8jrSK7uuBJXy/asEp0Hsf1JS6ozjDPuOOHmccdj3GRm4Kxk5sy2FduRJ/BfvAnUS9HMYOmKW91y8/b4g7NlDpo5PyzUs3Fpo2rpMOfRLzRq/2s4FEn53D41daNUcbdjoOHGzdi8LjjRgwegNyIQSORMxw1JLkpg8cmN2LwIOVGoEcrOCPgRisYjxutYLzPaAUpPqNVwCrAjRi8HHAj0EaFCLRRA1YKbgTKqCDcy6iQgjYqRKCNChFoo8IFGM6oMB5nVBjvY1RI8TEqpKCNChFoo0IE2qgQgTYqRKCN6rm2d4Z7GRVS0EaFCLRRIQJtVLNeDDAqjMcZFcb7GBVSfIwKKWijQgTaqBCBNipEoI0KEWijQgTKqCDcy6iQgjYqRKCNChFoozbPx/obFcbjjArjfYwKKT5GhRS0USECbVSIQBsVItBGhQi0USECZVQQ7mVUSEEbFSLQRoUItFHNpYMAo8J4nFFhvI9RIcXHqJCCNipEoI0KEWijQgTaqBCBNipEoIwKwr2MCiloo0IE2qgQ0dc/2+vqrmdD9vG7ns7HTIZfumor9cP+/gEbdTgctayVmzX8AZoLpR6jzqdlD02+MQwiJlIos0XtuBfE5poLpKir9X9c9j+WZtMDvymsfYDHXOgH8KOhkWBP5aivy9uRIMk76uvpdiRYdR71jb52JJgGj/oGXePL5Z1UejoCwX3DjBW87wjvG62tcNjEfWO0FQhbuG9ktgJhA/eNx1bgx6genN9GfxzYTserm6IBoa87WoQTN6GvW0KtlsMxNMZQ0dyEoeq5CUNldBNQejoxeGHdKLTCbpSf1NBmWKn9jeomYKWGBC+pAcZfaojylhqi/KSGAyNWakjASu0/OLsJXlIDjL/UEOUtNUT5SQ2nMqzUkICVGhKwUgdOyE6Mv9QQ5S01RPlJDRd3WKkhASs1JGClhgQvqQHGX2qI8pYaovykBlkyWmpIwEoNCVipIcFLaoDxlxqivKWGqD6pzS7KhtQoha1w3CLMCsRNyFYgbnC2Aj2yJSvaM1uyCJ7ZEtRqqTkuW7JFcxOGqucmDJXRTUDp6cTghXWj0Aq7UX5S47KlLqn9jeomYKXGZUtOqXHZUq/UuGypV2pctuSWGpctdUmNy5a6pPYfnN0EL6lx2VKv1LhsqVdqXLbklhqXLXVJjcuWuqTGZUtdUgdOyE6Mv9S4bKlXaly25JYaly11SY3LlrqkxmVLXVLjsiWn1LhsqVdqXLbUKzUuW3JLjcuWuqTGZUtdUuOypS6pcdmSU2pcttQrNS5b6pXakS3tPm/8aljNNr93pz9cvi54/cXx1gMzSfPFue1FQPPBm2T16151cF2TqP3Fs/ZtU+H2gmFTogmERcVzXVbcfuWXo6h7JYU+b5Yn+nAJinR8s6+pwvrkl59uG3N9EbT53MYFz94al3Vj99TWiMGq3vZpFHNV8XPbBbfVUddoIpsfw9P/3GSJBjy3v7DW1DV5YQ1KH7/kUt6x5tNq4f6o5NOyObq/Zx6ffXN80nxhoTM+N4OEE7C7WZnmZfvDd44Wb37CoL167Wj18yquMi61G3hHm5v7KUKbe13B5X/Fl/8BAAD//wMAUEsDBBQABgAIAAAAIQDtJ+K6ZQEAALUCAAAQAAgBZG9jUHJvcHMvYXBwLnhtbCCiBAEooAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJxSwUrFMBC8C/5D6d2XPkER2RcRRTyoCK/qOSTbNpgmIVnF9/durNaqN3Pand1MZobA2dvoqldM2Qa/qderpq7Q62Cs7zf1Q3t1cFJXmZQ3ygWPm3qHuT6T+3twn0LERBZzxRQ+b+qBKJ4KkfWAo8orHnuedCGNirhNvQhdZzVeBv0yoidx2DTHAt8IvUFzEGfCemI8faX/kpqgi7782O4i80locYxOEcq7ctOtTKARxIxCG0i51o4oG4bnBu5Vj1muQUwFPIVkctmZCrgYVFKaOD95BGLRwXmMzmpFnKu8tTqFHDqqbpW2nkIeqkIAYrkF7GGL+iVZ2pUnli3cWD8JmQoWllSfVBw+1c0dbLVyeMHuZadcRhDfQGF5zg+xDZfF9ef8J7iw9GRp2Eal8Ze5BQ5bRtGw1Pm1GYBrDj+5ws53fY/ma+fvoMT1OP1CuT5aNXw+wvnC2OL8PeQ7AAAA//8DAFBLAQItABQABgAIAAAAIQBnzQ+udAEAADoFAAATAAAAAAAAAAAAAAAAAAAAAABbQ29udGVudF9UeXBlc10ueG1sUEsBAi0AFAAGAAgAAAAhAMfCJ7z/AAAA3wIAAAsAAAAAAAAAAAAAAAAArQMAAF9yZWxzLy5yZWxzUEsBAi0AFAAGAAgAAAAhABOqPof2AAAAMQMAABwAAAAAAAAAAAAAAAAA3QYAAHdvcmQvX3JlbHMvZG9jdW1lbnQueG1sLnJlbHNQSwECLQAUAAYACAAAACEAM+oBymACAAACBwAAEQAAAAAAAAAAAAAAAAAVCQAAd29yZC9kb2N1bWVudC54bWxQSwECLQAUAAYACAAAACEAJyDgAjMGAACMGgAAFQAAAAAAAAAAAAAAAACkCwAAd29yZC90aGVtZS90aGVtZTEueG1sUEsBAi0ACgAAAAAAAAAhAGoT2A2MJQAAjCUAABcAAAAAAAAAAAAAAAAAChIAAGRvY1Byb3BzL3RodW1ibmFpbC5qcGVnUEsBAi0AFAAGAAgAAAAhANJeFd+BAwAATAkAABEAAAAAAAAAAAAAAAAAyzcAAHdvcmQvc2V0dGluZ3MueG1sUEsBAi0AFAAGAAgAAAAhAPC8NQHcAQAA8QUAABIAAAAAAAAAAAAAAAAAezsAAHdvcmQvZm9udFRhYmxlLnhtbFBLAQItABQABgAIAAAAIQDgi8pVHwEAABECAAAUAAAAAAAAAAAAAAAAAIc9AAB3b3JkL3dlYlNldHRpbmdzLnhtbFBLAQItABQABgAIAAAAIQCf6lVfewEAABUDAAARAAAAAAAAAAAAAAAAANg+AABkb2NQcm9wcy9jb3JlLnhtbFBLAQItABQABgAIAAAAIQCBlv05MgsAAGRyAAAPAAAAAAAAAAAAAAAAAIpBAAB3b3JkL3N0eWxlcy54bWxQSwECLQAUAAYACAAAACEA7SfiumUBAAC1AgAAEAAAAAAAAAAAAAAAAADpTAAAZG9jUHJvcHMvYXBwLnhtbFBLBQYAAAAADAAMAAYDAACETwAAAAA='],
+            ['data:a!b#c&d-e^f_g+h.i/a!b#c&d-e^f_g+h.i;base64,foobar'],
+            ['data:text/plain;charset=utf-8;base64,SGVsbG8gV29ybGQh'],
+        ];
     }
 
     private function getContent(\SplFileObject $file)
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/DateIntervalNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/DateIntervalNormalizerTest.php
index 86478bb413..b8ac21b5a6 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/DateIntervalNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/DateIntervalNormalizerTest.php
@@ -22,14 +22,14 @@ class DateIntervalNormalizerTest extends TestCase
 
     public function dataProviderISO()
     {
-        $data = array(
-            array('P%YY%MM%DDT%HH%IM%SS', 'P00Y00M00DT00H00M00S', 'PT0S'),
-            array('P%yY%mM%dDT%hH%iM%sS', 'P0Y0M0DT0H0M0S', 'PT0S'),
-            array('P%yY%mM%dDT%hH%iM%sS', 'P10Y2M3DT16H5M6S', 'P10Y2M3DT16H5M6S'),
-            array('P%yY%mM%dDT%hH%iM', 'P10Y2M3DT16H5M', 'P10Y2M3DT16H5M'),
-            array('P%yY%mM%dDT%hH', 'P10Y2M3DT16H', 'P10Y2M3DT16H'),
-            array('P%yY%mM%dD', 'P10Y2M3D', 'P10Y2M3DT0H'),
-        );
+        $data = [
+            ['P%YY%MM%DDT%HH%IM%SS', 'P00Y00M00DT00H00M00S', 'PT0S'],
+            ['P%yY%mM%dDT%hH%iM%sS', 'P0Y0M0DT0H0M0S', 'PT0S'],
+            ['P%yY%mM%dDT%hH%iM%sS', 'P10Y2M3DT16H5M6S', 'P10Y2M3DT16H5M6S'],
+            ['P%yY%mM%dDT%hH%iM', 'P10Y2M3DT16H5M', 'P10Y2M3DT16H5M'],
+            ['P%yY%mM%dDT%hH', 'P10Y2M3DT16H', 'P10Y2M3DT16H'],
+            ['P%yY%mM%dD', 'P10Y2M3D', 'P10Y2M3DT0H'],
+        ];
 
         return $data;
     }
@@ -50,7 +50,7 @@ class DateIntervalNormalizerTest extends TestCase
      */
     public function testNormalizeUsingFormatPassedInContext($format, $output, $input)
     {
-        $this->assertEquals($output, $this->normalizer->normalize(new \DateInterval($input), null, array(DateIntervalNormalizer::FORMAT_KEY => $format)));
+        $this->assertEquals($output, $this->normalizer->normalize(new \DateInterval($input), null, [DateIntervalNormalizer::FORMAT_KEY => $format]));
     }
 
     /**
@@ -71,7 +71,7 @@ class DateIntervalNormalizerTest extends TestCase
 
     private function doTestNormalizeUsingFormatPassedInConstructor($format, $output, $input, bool $legacy = false)
     {
-        $normalizer = $legacy ? new DateIntervalNormalizer($format) : new DateIntervalNormalizer(array(DateIntervalNormalizer::FORMAT_KEY => $format));
+        $normalizer = $legacy ? new DateIntervalNormalizer($format) : new DateIntervalNormalizer([DateIntervalNormalizer::FORMAT_KEY => $format]);
         $this->assertEquals($output, $normalizer->normalize(new \DateInterval($input)));
     }
 
@@ -100,7 +100,7 @@ class DateIntervalNormalizerTest extends TestCase
      */
     public function testDenormalizeUsingFormatPassedInContext($format, $input, $output)
     {
-        $this->assertDateIntervalEquals(new \DateInterval($output), $this->normalizer->denormalize($input, \DateInterval::class, null, array(DateIntervalNormalizer::FORMAT_KEY => $format)));
+        $this->assertDateIntervalEquals(new \DateInterval($output), $this->normalizer->denormalize($input, \DateInterval::class, null, [DateIntervalNormalizer::FORMAT_KEY => $format]));
     }
 
     /**
@@ -121,7 +121,7 @@ class DateIntervalNormalizerTest extends TestCase
 
     private function doTestDenormalizeUsingFormatPassedInConstructor($format, $input, $output, bool $legacy = false)
     {
-        $normalizer = $legacy ? new DateIntervalNormalizer($format) : new DateIntervalNormalizer(array(DateIntervalNormalizer::FORMAT_KEY => $format));
+        $normalizer = $legacy ? new DateIntervalNormalizer($format) : new DateIntervalNormalizer([DateIntervalNormalizer::FORMAT_KEY => $format]);
         $this->assertDateIntervalEquals(new \DateInterval($output), $normalizer->denormalize($input, \DateInterval::class));
     }
 
@@ -155,7 +155,7 @@ class DateIntervalNormalizerTest extends TestCase
      */
     public function testDenormalizeFormatMismatchThrowsException()
     {
-        $this->normalizer->denormalize('P00Y00M00DT00H00M00S', \DateInterval::class, null, array(DateIntervalNormalizer::FORMAT_KEY => 'P%yY%mM%dD'));
+        $this->normalizer->denormalize('P00Y00M00DT00H00M00S', \DateInterval::class, null, [DateIntervalNormalizer::FORMAT_KEY => 'P%yY%mM%dD']);
     }
 
     private function assertDateIntervalEquals(\DateInterval $expected, \DateInterval $actual)
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
index c8a0815d20..7d087d7d5e 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/DateTimeNormalizerTest.php
@@ -44,7 +44,7 @@ class DateTimeNormalizerTest extends TestCase
 
     public function testNormalizeUsingFormatPassedInContext()
     {
-        $this->assertEquals('2016', $this->normalizer->normalize(new \DateTime('2016/01/01'), null, array(DateTimeNormalizer::FORMAT_KEY => 'Y')));
+        $this->assertEquals('2016', $this->normalizer->normalize(new \DateTime('2016/01/01'), null, [DateTimeNormalizer::FORMAT_KEY => 'Y']));
     }
 
     public function testNormalizeUsingFormatPassedInConstructor()
@@ -59,7 +59,7 @@ class DateTimeNormalizerTest extends TestCase
 
     private function doTestNormalizeUsingFormatPassedInConstructor(bool $legacy = false)
     {
-        $normalizer = $legacy ? new DateTimeNormalizer('y') : new DateTimeNormalizer(array(DateTimeNormalizer::FORMAT_KEY => 'y'));
+        $normalizer = $legacy ? new DateTimeNormalizer('y') : new DateTimeNormalizer([DateTimeNormalizer::FORMAT_KEY => 'y']);
         $this->assertEquals('16', $normalizer->normalize(new \DateTime('2016/01/01', new \DateTimeZone('UTC'))));
     }
 
@@ -78,7 +78,7 @@ class DateTimeNormalizerTest extends TestCase
         if ($legacy) {
             $normalizer = new DateTimeNormalizer(\DateTime::RFC3339, new \DateTimeZone('Japan'));
         } else {
-            $normalizer = new DateTimeNormalizer(array(DateTimeNormalizer::TIMEZONE_KEY => new \DateTimeZone('Japan')));
+            $normalizer = new DateTimeNormalizer([DateTimeNormalizer::TIMEZONE_KEY => new \DateTimeZone('Japan')]);
         }
 
         $this->assertSame('2016-12-01T00:00:00+09:00', $normalizer->normalize(new \DateTime('2016/12/01', new \DateTimeZone('Japan'))));
@@ -90,17 +90,17 @@ class DateTimeNormalizerTest extends TestCase
      */
     public function testNormalizeUsingTimeZonePassedInContext($expected, $input, $timezone)
     {
-        $this->assertSame($expected, $this->normalizer->normalize($input, null, array(
+        $this->assertSame($expected, $this->normalizer->normalize($input, null, [
             DateTimeNormalizer::TIMEZONE_KEY => $timezone,
-        )));
+        ]));
     }
 
     public function normalizeUsingTimeZonePassedInContextProvider()
     {
-        yield array('2016-12-01T00:00:00+00:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), null);
-        yield array('2016-12-01T00:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('Japan')), new \DateTimeZone('Japan'));
-        yield array('2016-12-01T09:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan'));
-        yield array('2016-12-01T09:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan'));
+        yield ['2016-12-01T00:00:00+00:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), null];
+        yield ['2016-12-01T00:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('Japan')), new \DateTimeZone('Japan')];
+        yield ['2016-12-01T09:00:00+09:00', new \DateTime('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan')];
+        yield ['2016-12-01T09:00:00+09:00', new \DateTimeImmutable('2016/12/01', new \DateTimeZone('UTC')), new \DateTimeZone('Japan')];
     }
 
     /**
@@ -113,17 +113,17 @@ class DateTimeNormalizerTest extends TestCase
             $this->normalizer->normalize(
                 $input,
                 null,
-                array(
+                [
                     DateTimeNormalizer::TIMEZONE_KEY => $timezone,
                     DateTimeNormalizer::FORMAT_KEY => $expectedFormat,
-                )
+                ]
             )
         );
     }
 
     public function normalizeUsingTimeZonePassedInContextAndExpectedFormatWithMicrosecondsProvider()
     {
-        yield array(
+        yield [
             '2018-12-01T18:03:06.067634',
             'Y-m-d\TH:i:s.u',
             \DateTime::createFromFormat(
@@ -132,9 +132,9 @@ class DateTimeNormalizerTest extends TestCase
                 new \DateTimeZone('UTC')
             ),
             null,
-        );
+        ];
 
-        yield array(
+        yield [
             '2018-12-01T18:03:06.067634',
             'Y-m-d\TH:i:s.u',
             \DateTime::createFromFormat(
@@ -143,9 +143,9 @@ class DateTimeNormalizerTest extends TestCase
                 new \DateTimeZone('UTC')
             ),
             new \DateTimeZone('UTC'),
-        );
+        ];
 
-        yield array(
+        yield [
             '2018-12-01T19:03:06.067634+01:00',
             'Y-m-d\TH:i:s.uP',
             \DateTimeImmutable::createFromFormat(
@@ -154,9 +154,9 @@ class DateTimeNormalizerTest extends TestCase
                 new \DateTimeZone('UTC')
             ),
             new \DateTimeZone('Europe/Rome'),
-        );
+        ];
 
-        yield array(
+        yield [
             '2018-12-01T20:03:06.067634+02:00',
             'Y-m-d\TH:i:s.uP',
             \DateTime::createFromFormat(
@@ -165,9 +165,9 @@ class DateTimeNormalizerTest extends TestCase
                 new \DateTimeZone('UTC')
             ),
             new \DateTimeZone('Europe/Kiev'),
-        );
+        ];
 
-        yield array(
+        yield [
             '2018-12-01T19:03:06.067634',
             'Y-m-d\TH:i:s.u',
             \DateTime::createFromFormat(
@@ -176,7 +176,7 @@ class DateTimeNormalizerTest extends TestCase
                 new \DateTimeZone('UTC')
             ),
             new \DateTimeZone('Europe/Berlin'),
-        );
+        ];
     }
 
     /**
@@ -217,18 +217,18 @@ class DateTimeNormalizerTest extends TestCase
     {
         $timezone = new \DateTimeZone('Japan');
         $expected = new \DateTime('2016/12/01 17:35:00', $timezone);
-        $normalizer = $legacy ? new DateTimeNormalizer(null, $timezone) : new DateTimeNormalizer(array(DateTimeNormalizer::TIMEZONE_KEY => $timezone));
+        $normalizer = $legacy ? new DateTimeNormalizer(null, $timezone) : new DateTimeNormalizer([DateTimeNormalizer::TIMEZONE_KEY => $timezone]);
 
-        $this->assertEquals($expected, $normalizer->denormalize('2016.12.01 17:35:00', \DateTime::class, null, array(
+        $this->assertEquals($expected, $normalizer->denormalize('2016.12.01 17:35:00', \DateTime::class, null, [
             DateTimeNormalizer::FORMAT_KEY => 'Y.m.d H:i:s',
-        )));
+        ]));
     }
 
     public function testDenormalizeUsingFormatPassedInContext()
     {
-        $this->assertEquals(new \DateTimeImmutable('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTimeInterface::class, null, array(DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|')));
-        $this->assertEquals(new \DateTimeImmutable('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTimeImmutable::class, null, array(DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|')));
-        $this->assertEquals(new \DateTime('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTime::class, null, array(DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|')));
+        $this->assertEquals(new \DateTimeImmutable('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTimeInterface::class, null, [DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|']));
+        $this->assertEquals(new \DateTimeImmutable('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTimeImmutable::class, null, [DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|']));
+        $this->assertEquals(new \DateTime('2016/01/01'), $this->normalizer->denormalize('2016.01.01', \DateTime::class, null, [DateTimeNormalizer::FORMAT_KEY => 'Y.m.d|']));
     }
 
     /**
@@ -236,38 +236,38 @@ class DateTimeNormalizerTest extends TestCase
      */
     public function testDenormalizeUsingTimezonePassedInContext($input, $expected, $timezone, $format = null)
     {
-        $actual = $this->normalizer->denormalize($input, \DateTimeInterface::class, null, array(
+        $actual = $this->normalizer->denormalize($input, \DateTimeInterface::class, null, [
             DateTimeNormalizer::TIMEZONE_KEY => $timezone,
             DateTimeNormalizer::FORMAT_KEY => $format,
-        ));
+        ]);
 
         $this->assertEquals($expected, $actual);
     }
 
     public function denormalizeUsingTimezonePassedInContextProvider()
     {
-        yield 'with timezone' => array(
+        yield 'with timezone' => [
             '2016/12/01 17:35:00',
             new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
             new \DateTimeZone('Japan'),
-        );
-        yield 'with timezone as string' => array(
+        ];
+        yield 'with timezone as string' => [
             '2016/12/01 17:35:00',
             new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
             'Japan',
-        );
-        yield 'with format without timezone information' => array(
+        ];
+        yield 'with format without timezone information' => [
             '2016.12.01 17:35:00',
             new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('Japan')),
             new \DateTimeZone('Japan'),
             'Y.m.d H:i:s',
-        );
-        yield 'ignored with format with timezone information' => array(
+        ];
+        yield 'ignored with format with timezone information' => [
             '2016-12-01T17:35:00Z',
             new \DateTimeImmutable('2016/12/01 17:35:00', new \DateTimeZone('UTC')),
             'Europe/Paris',
             \DateTime::RFC3339,
-        );
+        ];
     }
 
     /**
@@ -301,6 +301,6 @@ class DateTimeNormalizerTest extends TestCase
      */
     public function testDenormalizeFormatMismatchThrowsException()
     {
-        $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', \DateTimeInterface::class, null, array(DateTimeNormalizer::FORMAT_KEY => 'Y-m-d|'));
+        $this->normalizer->denormalize('2016-01-01T00:00:00+00:00', \DateTimeInterface::class, null, [DateTimeNormalizer::FORMAT_KEY => 'Y-m-d|']);
     }
 }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
index 07277579b3..37948bef47 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/GetSetMethodNormalizerTest.php
@@ -41,7 +41,7 @@ class GetSetMethodNormalizerTest extends TestCase
         $this->createNormalizer();
     }
 
-    private function createNormalizer(array $defaultContext = array())
+    private function createNormalizer(array $defaultContext = [])
     {
         $this->serializer = $this->getMockBuilder(__NAMESPACE__.'\SerializerNormalizer')->getMock();
         $this->normalizer = new GetSetMethodNormalizer(null, null, null, null, null, $defaultContext);
@@ -72,14 +72,14 @@ class GetSetMethodNormalizerTest extends TestCase
         ;
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'foo',
                 'bar' => 'bar',
                 'baz' => true,
                 'fooBar' => 'foobar',
                 'camelCase' => 'camelcase',
                 'object' => 'string_object',
-            ),
+            ],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -87,7 +87,7 @@ class GetSetMethodNormalizerTest extends TestCase
     public function testDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'),
+            ['foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'],
             __NAMESPACE__.'\GetSetDummy',
             'any'
         );
@@ -115,7 +115,7 @@ class GetSetMethodNormalizerTest extends TestCase
     public function testConstructorDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'),
+            ['foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'],
             __NAMESPACE__.'\GetConstructorDummy', 'any');
         $this->assertEquals('foo', $obj->getFoo());
         $this->assertEquals('bar', $obj->getBar());
@@ -125,7 +125,7 @@ class GetSetMethodNormalizerTest extends TestCase
     public function testConstructorDenormalizeWithNullArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => null, 'baz' => true),
+            ['foo' => 'foo', 'bar' => null, 'baz' => true],
             __NAMESPACE__.'\GetConstructorDummy', 'any');
         $this->assertEquals('foo', $obj->getFoo());
         $this->assertNull($obj->getBar());
@@ -135,36 +135,36 @@ class GetSetMethodNormalizerTest extends TestCase
     public function testConstructorDenormalizeWithMissingOptionalArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'test', 'baz' => array(1, 2, 3)),
+            ['foo' => 'test', 'baz' => [1, 2, 3]],
             __NAMESPACE__.'\GetConstructorOptionalArgsDummy', 'any');
         $this->assertEquals('test', $obj->getFoo());
-        $this->assertEquals(array(), $obj->getBar());
-        $this->assertEquals(array(1, 2, 3), $obj->getBaz());
+        $this->assertEquals([], $obj->getBar());
+        $this->assertEquals([1, 2, 3], $obj->getBaz());
     }
 
     public function testConstructorDenormalizeWithOptionalDefaultArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('bar' => 'test'),
+            ['bar' => 'test'],
             __NAMESPACE__.'\GetConstructorArgsWithDefaultValueDummy', 'any');
-        $this->assertEquals(array(), $obj->getFoo());
+        $this->assertEquals([], $obj->getFoo());
         $this->assertEquals('test', $obj->getBar());
     }
 
     public function testConstructorDenormalizeWithVariadicArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => array(1, 2, 3)),
+            ['foo' => [1, 2, 3]],
             'Symfony\Component\Serializer\Tests\Fixtures\VariadicConstructorArgsDummy', 'any');
-        $this->assertEquals(array(1, 2, 3), $obj->getFoo());
+        $this->assertEquals([1, 2, 3], $obj->getFoo());
     }
 
     public function testConstructorDenormalizeWithMissingVariadicArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array(),
+            [],
             'Symfony\Component\Serializer\Tests\Fixtures\VariadicConstructorArgsDummy', 'any');
-        $this->assertEquals(array(), $obj->getFoo());
+        $this->assertEquals([], $obj->getFoo());
     }
 
     public function testConstructorWithObjectDenormalize()
@@ -181,7 +181,7 @@ class GetSetMethodNormalizerTest extends TestCase
 
     public function testConstructorWArgWithPrivateMutator()
     {
-        $obj = $this->normalizer->denormalize(array('foo' => 'bar'), __NAMESPACE__.'\ObjectConstructorArgsWithPrivateMutatorDummy', 'any');
+        $obj = $this->normalizer->denormalize(['foo' => 'bar'], __NAMESPACE__.'\ObjectConstructorArgsWithPrivateMutatorDummy', 'any');
         $this->assertEquals('bar', $obj->getFoo());
     }
 
@@ -199,18 +199,18 @@ class GetSetMethodNormalizerTest extends TestCase
         $obj->setKevin('kevin');
         $obj->setCoopTilleuls('coopTilleuls');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'bar' => 'bar',
-        ), $this->normalizer->normalize($obj, null, array(GetSetMethodNormalizer::GROUPS => array('c'))));
+        ], $this->normalizer->normalize($obj, null, [GetSetMethodNormalizer::GROUPS => ['c']]));
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'symfony' => 'symfony',
             'foo' => 'foo',
             'fooBar' => 'fooBar',
             'bar' => 'bar',
             'kevin' => 'kevin',
             'coopTilleuls' => 'coopTilleuls',
-        ), $this->normalizer->normalize($obj, null, array(GetSetMethodNormalizer::GROUPS => array('a', 'c'))));
+        ], $this->normalizer->normalize($obj, null, [GetSetMethodNormalizer::GROUPS => ['a', 'c']]));
     }
 
     public function testGroupsDenormalize()
@@ -222,13 +222,13 @@ class GetSetMethodNormalizerTest extends TestCase
         $obj = new GroupDummy();
         $obj->setFoo('foo');
 
-        $toNormalize = array('foo' => 'foo', 'bar' => 'bar');
+        $toNormalize = ['foo' => 'foo', 'bar' => 'bar'];
 
         $normalized = $this->normalizer->denormalize(
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(GetSetMethodNormalizer::GROUPS => array('a'))
+            [GetSetMethodNormalizer::GROUPS => ['a']]
         );
         $this->assertEquals($obj, $normalized);
 
@@ -238,7 +238,7 @@ class GetSetMethodNormalizerTest extends TestCase
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(GetSetMethodNormalizer::GROUPS => array('a', 'b'))
+            [GetSetMethodNormalizer::GROUPS => ['a', 'b']]
         );
         $this->assertEquals($obj, $normalized);
     }
@@ -255,12 +255,12 @@ class GetSetMethodNormalizerTest extends TestCase
         $obj->setCoopTilleuls('les-tilleuls.coop');
 
         $this->assertEquals(
-            array(
+            [
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
-            ),
-            $this->normalizer->normalize($obj, null, array(GetSetMethodNormalizer::GROUPS => array('name_converter')))
+            ],
+            $this->normalizer->normalize($obj, null, [GetSetMethodNormalizer::GROUPS => ['name_converter']])
         );
     }
 
@@ -276,12 +276,12 @@ class GetSetMethodNormalizerTest extends TestCase
 
         $this->assertEquals(
             $obj,
-            $this->normalizer->denormalize(array(
+            $this->normalizer->denormalize([
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
                 'coop_tilleuls' => 'les-tilleuls.coop',
-            ), 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, array(GetSetMethodNormalizer::GROUPS => array('name_converter')))
+            ], 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, [GetSetMethodNormalizer::GROUPS => ['name_converter']])
         );
     }
 
@@ -303,7 +303,7 @@ class GetSetMethodNormalizerTest extends TestCase
 
     private function doTestCallbacks($callbacks, $value, $result, $message, bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(GetSetMethodNormalizer::CALLBACKS => $callbacks));
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([GetSetMethodNormalizer::CALLBACKS => $callbacks]);
 
         $obj = new GetConstructorDummy('', $value, true);
         $this->assertEquals(
@@ -331,8 +331,8 @@ class GetSetMethodNormalizerTest extends TestCase
 
     private function doTestUncallableCallbacks(bool $legacy = false)
     {
-        $callbacks = array('bar' => null);
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(GetSetMethodNormalizer::CALLBACKS => $callbacks));
+        $callbacks = ['bar' => null];
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([GetSetMethodNormalizer::CALLBACKS => $callbacks]);
 
         $obj = new GetConstructorDummy('baz', 'quux', true);
 
@@ -351,8 +351,8 @@ class GetSetMethodNormalizerTest extends TestCase
 
     private function doTestIgnoredAttributes(bool $legacy = false)
     {
-        $ignoredAttributes = array('foo', 'bar', 'baz', 'camelCase', 'object');
-        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer(array(GetSetMethodNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes));
+        $ignoredAttributes = ['foo', 'bar', 'baz', 'camelCase', 'object'];
+        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer([GetSetMethodNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes]);
 
         $obj = new GetSetDummy();
         $obj->setFoo('foo');
@@ -360,45 +360,45 @@ class GetSetMethodNormalizerTest extends TestCase
         $obj->setBaz(true);
 
         $this->assertEquals(
-            array('fooBar' => 'foobar'),
+            ['fooBar' => 'foobar'],
             $this->normalizer->normalize($obj, 'any')
         );
     }
 
     public function provideCallbacks()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'bar' => function ($bar) {
                         return 'baz';
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => 'baz', 'baz' => true),
+                ['foo' => '', 'bar' => 'baz', 'baz' => true],
                 'Change a string',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bar) {
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => null, 'baz' => true),
+                ['foo' => '', 'bar' => null, 'baz' => true],
                 'Null an item',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bar) {
                         return $bar->format('d-m-Y H:i:s');
                     },
-                ),
+                ],
                 new \DateTime('2011-09-10 06:30:00'),
-                array('foo' => '', 'bar' => '10-09-2011 06:30:00', 'baz' => true),
+                ['foo' => '', 'bar' => '10-09-2011 06:30:00', 'baz' => true],
                 'Format a date',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         $foos = '';
                         foreach ($bars as $bar) {
@@ -407,22 +407,22 @@ class GetSetMethodNormalizerTest extends TestCase
 
                         return $foos;
                     },
-                ),
-                array(new GetConstructorDummy('baz', '', false), new GetConstructorDummy('quux', '', false)),
-                array('foo' => '', 'bar' => 'bazquux', 'baz' => true),
+                ],
+                [new GetConstructorDummy('baz', '', false), new GetConstructorDummy('quux', '', false)],
+                ['foo' => '', 'bar' => 'bazquux', 'baz' => true],
                 'Collect a property',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         return \count($bars);
                     },
-                ),
-                array(new GetConstructorDummy('baz', '', false), new GetConstructorDummy('quux', '', false)),
-                array('foo' => '', 'bar' => 2, 'baz' => true),
+                ],
+                [new GetConstructorDummy('baz', '', false), new GetConstructorDummy('quux', '', false)],
+                ['foo' => '', 'bar' => 2, 'baz' => true],
                 'Count a property',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -459,8 +459,8 @@ class GetSetMethodNormalizerTest extends TestCase
 
     private function doTestUnableToNormalizeCircularReference(bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer(array(GetSetMethodNormalizer::CIRCULAR_REFERENCE_LIMIT => 2));
-        $this->serializer = new Serializer(array($this->normalizer));
+        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer([GetSetMethodNormalizer::CIRCULAR_REFERENCE_LIMIT => 2]);
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
 
         $obj = new CircularReferenceDummy();
@@ -469,16 +469,16 @@ class GetSetMethodNormalizerTest extends TestCase
 
     public function testSiblingReference()
     {
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $siblingHolder = new SiblingHolder();
 
-        $expected = array(
-            'sibling0' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling1' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling2' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-        );
+        $expected = [
+            'sibling0' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling1' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling2' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+        ];
         $this->assertEquals($expected, $this->normalizer->normalize($siblingHolder));
     }
 
@@ -498,13 +498,13 @@ class GetSetMethodNormalizerTest extends TestCase
             return \get_class($obj);
         };
 
-        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer(array(GetSetMethodNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler));
-        $this->serializer = new Serializer(array($this->normalizer));
+        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer([GetSetMethodNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler]);
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
 
         $obj = new CircularReferenceDummy();
 
-        $expected = array('me' => 'Symfony\Component\Serializer\Tests\Fixtures\CircularReferenceDummy');
+        $expected = ['me' => 'Symfony\Component\Serializer\Tests\Fixtures\CircularReferenceDummy'];
         $this->assertEquals($expected, $this->normalizer->normalize($obj));
     }
 
@@ -514,10 +514,10 @@ class GetSetMethodNormalizerTest extends TestCase
         $dummy->setFoo('foo');
 
         $obj = $this->normalizer->denormalize(
-            array('bar' => 'bar'),
+            ['bar' => 'bar'],
             __NAMESPACE__.'\GetSetDummy',
             null,
-            array(GetSetMethodNormalizer::OBJECT_TO_POPULATE => $dummy)
+            [GetSetMethodNormalizer::OBJECT_TO_POPULATE => $dummy]
         );
 
         $this->assertEquals($dummy, $obj);
@@ -529,13 +529,13 @@ class GetSetMethodNormalizerTest extends TestCase
     {
         $this->assertEquals(
             new GetSetDummy(),
-            $this->normalizer->denormalize(array('non_existing' => true), __NAMESPACE__.'\GetSetDummy')
+            $this->normalizer->denormalize(['non_existing' => true], __NAMESPACE__.'\GetSetDummy')
         );
     }
 
     public function testDenormalizeShouldNotSetStaticAttribute()
     {
-        $obj = $this->normalizer->denormalize(array('staticObject' => true), __NAMESPACE__.'\GetSetDummy');
+        $obj = $this->normalizer->denormalize(['staticObject' => true], __NAMESPACE__.'\GetSetDummy');
 
         $this->assertEquals(new GetSetDummy(), $obj);
         $this->assertNull(GetSetDummy::getStaticObject());
@@ -553,13 +553,13 @@ class GetSetMethodNormalizerTest extends TestCase
 
     public function testPrivateSetter()
     {
-        $obj = $this->normalizer->denormalize(array('foo' => 'foobar'), __NAMESPACE__.'\ObjectWithPrivateSetterDummy');
+        $obj = $this->normalizer->denormalize(['foo' => 'foobar'], __NAMESPACE__.'\ObjectWithPrivateSetterDummy');
         $this->assertEquals('bar', $obj->getFoo());
     }
 
     public function testHasGetterDenormalize()
     {
-        $obj = $this->normalizer->denormalize(array('foo' => true), ObjectWithHasGetterDummy::class);
+        $obj = $this->normalizer->denormalize(['foo' => true], ObjectWithHasGetterDummy::class);
         $this->assertTrue($obj->hasFoo());
     }
 
@@ -569,7 +569,7 @@ class GetSetMethodNormalizerTest extends TestCase
         $obj->setFoo(true);
 
         $this->assertEquals(
-            array('foo' => true),
+            ['foo' => true],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -578,7 +578,7 @@ class GetSetMethodNormalizerTest extends TestCase
     {
         $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
         $this->normalizer = new GetSetMethodNormalizer($classMetadataFactory);
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $level1 = new MaxDepthDummy();
@@ -596,20 +596,20 @@ class GetSetMethodNormalizerTest extends TestCase
         $level4->bar = 'level4';
         $level3->child = $level4;
 
-        $result = $serializer->normalize($level1, null, array(GetSetMethodNormalizer::ENABLE_MAX_DEPTH => true));
+        $result = $serializer->normalize($level1, null, [GetSetMethodNormalizer::ENABLE_MAX_DEPTH => true]);
 
-        $expected = array(
+        $expected = [
             'bar' => 'level1',
-            'child' => array(
+            'child' => [
                     'bar' => 'level2',
-                    'child' => array(
+                    'child' => [
                             'bar' => 'level3',
-                            'child' => array(
+                            'child' => [
                                     'child' => null,
-                                ),
-                        ),
-                ),
-            );
+                                ],
+                        ],
+                ],
+            ];
 
         $this->assertEquals($expected, $result);
     }
@@ -744,7 +744,7 @@ class GetConstructorOptionalArgsDummy
     private $bar;
     private $baz;
 
-    public function __construct($foo, $bar = array(), $baz = array())
+    public function __construct($foo, $bar = [], $baz = [])
     {
         $this->foo = $foo;
         $this->bar = $bar;
@@ -777,7 +777,7 @@ class GetConstructorArgsWithDefaultValueDummy
     protected $foo;
     protected $bar;
 
-    public function __construct($foo = array(), $bar)
+    public function __construct($foo = [], $bar)
     {
         $this->foo = $foo;
         $this->bar = $bar;
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php
index d1628be2b5..5f6731b7ca 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/JsonSerializableNormalizerTest.php
@@ -37,7 +37,7 @@ class JsonSerializableNormalizerTest extends TestCase
         $this->createNormalizer();
     }
 
-    private function createNormalizer(array $defaultContext = array())
+    private function createNormalizer(array $defaultContext = [])
     {
         $this->serializer = $this->getMockBuilder(JsonSerializerNormalizer::class)->getMock();
         $this->normalizer = new JsonSerializableNormalizer(null, null, $defaultContext);
@@ -56,7 +56,7 @@ class JsonSerializableNormalizerTest extends TestCase
             ->expects($this->once())
             ->method('normalize')
             ->will($this->returnCallback(function ($data) {
-                $this->assertArraySubset(array('foo' => 'a', 'bar' => 'b', 'baz' => 'c'), $data);
+                $this->assertArraySubset(['foo' => 'a', 'bar' => 'b', 'baz' => 'c'], $data);
 
                 return 'string_object';
             }))
@@ -86,7 +86,7 @@ class JsonSerializableNormalizerTest extends TestCase
      */
     private function doTestCircularNormalize(bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCircularReferenceLimit(1) : $this->createNormalizer(array(JsonSerializableNormalizer::CIRCULAR_REFERENCE_LIMIT => 1));
+        $legacy ? $this->normalizer->setCircularReferenceLimit(1) : $this->createNormalizer([JsonSerializableNormalizer::CIRCULAR_REFERENCE_LIMIT => 1]);
 
         $this->serializer
             ->expects($this->once())
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
index b4619c262d..b2bc76a86a 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectNormalizerTest.php
@@ -53,7 +53,7 @@ class ObjectNormalizerTest extends TestCase
         $this->createNormalizer();
     }
 
-    private function createNormalizer(array $defaultContext = array(), ClassMetadataFactoryInterface $classMetadataFactory = null)
+    private function createNormalizer(array $defaultContext = [], ClassMetadataFactoryInterface $classMetadataFactory = null)
     {
         $this->serializer = $this->getMockBuilder(__NAMESPACE__.'\ObjectSerializerNormalizer')->getMock();
         $this->normalizer = new ObjectNormalizer($classMetadataFactory, null, null, null, null, null, $defaultContext);
@@ -78,14 +78,14 @@ class ObjectNormalizerTest extends TestCase
         ;
 
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'foo',
                 'bar' => 'bar',
                 'baz' => true,
                 'fooBar' => 'foobar',
                 'camelCase' => 'camelcase',
                 'object' => 'string_object',
-            ),
+            ],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -93,7 +93,7 @@ class ObjectNormalizerTest extends TestCase
     public function testDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'),
+            ['foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'],
             __NAMESPACE__.'\ObjectDummy',
             'any'
         );
@@ -121,7 +121,7 @@ class ObjectNormalizerTest extends TestCase
     public function testConstructorDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'),
+            ['foo' => 'foo', 'bar' => 'bar', 'baz' => true, 'fooBar' => 'foobar'],
             __NAMESPACE__.'\ObjectConstructorDummy', 'any');
         $this->assertEquals('foo', $obj->getFoo());
         $this->assertEquals('bar', $obj->bar);
@@ -131,7 +131,7 @@ class ObjectNormalizerTest extends TestCase
     public function testConstructorDenormalizeWithNullArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => null, 'baz' => true),
+            ['foo' => 'foo', 'bar' => null, 'baz' => true],
             __NAMESPACE__.'\ObjectConstructorDummy', 'any');
         $this->assertEquals('foo', $obj->getFoo());
         $this->assertNull($obj->bar);
@@ -141,19 +141,19 @@ class ObjectNormalizerTest extends TestCase
     public function testConstructorDenormalizeWithMissingOptionalArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'test', 'baz' => array(1, 2, 3)),
+            ['foo' => 'test', 'baz' => [1, 2, 3]],
             __NAMESPACE__.'\ObjectConstructorOptionalArgsDummy', 'any');
         $this->assertEquals('test', $obj->getFoo());
-        $this->assertEquals(array(), $obj->bar);
-        $this->assertEquals(array(1, 2, 3), $obj->getBaz());
+        $this->assertEquals([], $obj->bar);
+        $this->assertEquals([1, 2, 3], $obj->getBaz());
     }
 
     public function testConstructorDenormalizeWithOptionalDefaultArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('bar' => 'test'),
+            ['bar' => 'test'],
             __NAMESPACE__.'\ObjectConstructorArgsWithDefaultValueDummy', 'any');
-        $this->assertEquals(array(), $obj->getFoo());
+        $this->assertEquals([], $obj->getFoo());
         $this->assertEquals('test', $obj->getBar());
     }
 
@@ -171,16 +171,16 @@ class ObjectNormalizerTest extends TestCase
 
     public function testConstructorWithObjectTypeHintDenormalize()
     {
-        $data = array(
+        $data = [
             'id' => 10,
-            'inner' => array(
+            'inner' => [
                 'foo' => 'oof',
                 'bar' => 'rab',
-            ),
-        );
+            ],
+        ];
 
         $normalizer = new ObjectNormalizer();
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
         $normalizer->setSerializer($serializer);
 
         $obj = $normalizer->denormalize($data, DummyWithConstructorObject::class);
@@ -193,13 +193,13 @@ class ObjectNormalizerTest extends TestCase
 
     public function testConstructorWithUnconstructableNullableObjectTypeHintDenormalize()
     {
-        $data = array(
+        $data = [
             'id' => 10,
             'inner' => null,
-        );
+        ];
 
         $normalizer = new ObjectNormalizer();
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
         $normalizer->setSerializer($serializer);
 
         $obj = $normalizer->denormalize($data, DummyWithNullableConstructorObject::class);
@@ -214,16 +214,16 @@ class ObjectNormalizerTest extends TestCase
      */
     public function testConstructorWithUnknownObjectTypeHintDenormalize()
     {
-        $data = array(
+        $data = [
             'id' => 10,
-            'unknown' => array(
+            'unknown' => [
                 'foo' => 'oof',
                 'bar' => 'rab',
-            ),
-        );
+            ],
+        ];
 
         $normalizer = new ObjectNormalizer();
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
         $normalizer->setSerializer($serializer);
 
         $normalizer->denormalize($data, DummyWithConstructorInexistingObject::class);
@@ -235,9 +235,9 @@ class ObjectNormalizerTest extends TestCase
      */
     public function testConstructorWithMissingData()
     {
-        $data = array(
+        $data = [
             'foo' => 10,
-        );
+        ];
 
         $normalizer = new ObjectNormalizer();
 
@@ -246,17 +246,17 @@ class ObjectNormalizerTest extends TestCase
 
     public function testFillWithEmptyDataWhenMissingData()
     {
-        $data = array(
+        $data = [
             'foo' => 10,
-        );
+        ];
 
         $normalizer = new ObjectNormalizer();
 
-        $result = $normalizer->denormalize($data, DummyValueObject::class, 'json', array(
-            'default_constructor_arguments' => array(
-                DummyValueObject::class => array('foo' => '', 'bar' => '', 'baz' => null),
-            ),
-        ));
+        $result = $normalizer->denormalize($data, DummyValueObject::class, 'json', [
+            'default_constructor_arguments' => [
+                DummyValueObject::class => ['foo' => '', 'bar' => '', 'baz' => null],
+            ],
+        ]);
 
         $this->assertEquals(new DummyValueObject(10, '', null), $result);
     }
@@ -275,18 +275,18 @@ class ObjectNormalizerTest extends TestCase
         $obj->setKevin('kevin');
         $obj->setCoopTilleuls('coopTilleuls');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'bar' => 'bar',
-        ), $this->normalizer->normalize($obj, null, array(ObjectNormalizer::GROUPS => array('c'))));
+        ], $this->normalizer->normalize($obj, null, [ObjectNormalizer::GROUPS => ['c']]));
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'symfony' => 'symfony',
             'foo' => 'foo',
             'fooBar' => 'fooBar',
             'bar' => 'bar',
             'kevin' => 'kevin',
             'coopTilleuls' => 'coopTilleuls',
-        ), $this->normalizer->normalize($obj, null, array(ObjectNormalizer::GROUPS => array('a', 'c'))));
+        ], $this->normalizer->normalize($obj, null, [ObjectNormalizer::GROUPS => ['a', 'c']]));
     }
 
     public function testGroupsDenormalize()
@@ -298,13 +298,13 @@ class ObjectNormalizerTest extends TestCase
         $obj = new GroupDummy();
         $obj->setFoo('foo');
 
-        $toNormalize = array('foo' => 'foo', 'bar' => 'bar');
+        $toNormalize = ['foo' => 'foo', 'bar' => 'bar'];
 
         $normalized = $this->normalizer->denormalize(
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(ObjectNormalizer::GROUPS => array('a'))
+            [ObjectNormalizer::GROUPS => ['a']]
         );
         $this->assertEquals($obj, $normalized);
 
@@ -314,7 +314,7 @@ class ObjectNormalizerTest extends TestCase
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(ObjectNormalizer::GROUPS => array('a', 'b'))
+            [ObjectNormalizer::GROUPS => ['a', 'b']]
         );
         $this->assertEquals($obj, $normalized);
     }
@@ -328,7 +328,7 @@ class ObjectNormalizerTest extends TestCase
         $obj = new GroupDummy();
         $obj->setFoo('foo');
 
-        $this->assertEquals(array(), $this->normalizer->normalize($obj, null, array('groups' => array('notExist'))));
+        $this->assertEquals([], $this->normalizer->normalize($obj, null, ['groups' => ['notExist']]));
     }
 
     public function testGroupsNormalizeWithNameConverter()
@@ -343,12 +343,12 @@ class ObjectNormalizerTest extends TestCase
         $obj->setCoopTilleuls('les-tilleuls.coop');
 
         $this->assertEquals(
-            array(
+            [
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
-            ),
-            $this->normalizer->normalize($obj, null, array(ObjectNormalizer::GROUPS => array('name_converter')))
+            ],
+            $this->normalizer->normalize($obj, null, [ObjectNormalizer::GROUPS => ['name_converter']])
         );
     }
 
@@ -364,12 +364,12 @@ class ObjectNormalizerTest extends TestCase
 
         $this->assertEquals(
             $obj,
-            $this->normalizer->denormalize(array(
+            $this->normalizer->denormalize([
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
                 'coop_tilleuls' => 'les-tilleuls.coop',
-            ), 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, array(ObjectNormalizer::GROUPS => array('name_converter')))
+            ], 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, [ObjectNormalizer::GROUPS => ['name_converter']])
         );
     }
 
@@ -384,12 +384,12 @@ class ObjectNormalizerTest extends TestCase
 
         $this->assertEquals(
             $obj,
-            $this->normalizer->denormalize(array('bar' => 'xyz'),
+            $this->normalizer->denormalize(['bar' => 'xyz'],
                 'Symfony\Component\Serializer\Tests\Fixtures\NotSerializedConstructorArgumentDummy',
                 null,
-                array(ObjectNormalizer::DEFAULT_CONSTRUCTOR_ARGUMENTS => array(
-                    'Symfony\Component\Serializer\Tests\Fixtures\NotSerializedConstructorArgumentDummy' => array('foo' => 'buz'),
-                ))
+                [ObjectNormalizer::DEFAULT_CONSTRUCTOR_ARGUMENTS => [
+                    'Symfony\Component\Serializer\Tests\Fixtures\NotSerializedConstructorArgumentDummy' => ['foo' => 'buz'],
+                ]]
             )
         );
     }
@@ -412,7 +412,7 @@ class ObjectNormalizerTest extends TestCase
 
     private function doTestCallbacks($callbacks, $value, $result, $message, bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(ObjectNormalizer::CALLBACKS => $callbacks));
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([ObjectNormalizer::CALLBACKS => $callbacks]);
         $obj = new ObjectConstructorDummy('', $value, true);
 
         $this->assertEquals(
@@ -440,8 +440,8 @@ class ObjectNormalizerTest extends TestCase
 
     private function doTestUncallableCallbacks(bool $legacy = false)
     {
-        $callbacks = array('bar' => null);
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(ObjectNormalizer::CALLBACKS => $callbacks));
+        $callbacks = ['bar' => null];
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([ObjectNormalizer::CALLBACKS => $callbacks]);
 
         $obj = new ObjectConstructorDummy('baz', 'quux', true);
 
@@ -460,8 +460,8 @@ class ObjectNormalizerTest extends TestCase
 
     private function doTestIgnoredAttributes(bool $legacy = false)
     {
-        $ignoredAttributes = array('foo', 'bar', 'baz', 'camelCase', 'object');
-        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer(array(ObjectNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes));
+        $ignoredAttributes = ['foo', 'bar', 'baz', 'camelCase', 'object'];
+        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer([ObjectNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes]);
 
         $obj = new ObjectDummy();
         $obj->setFoo('foo');
@@ -469,7 +469,7 @@ class ObjectNormalizerTest extends TestCase
         $obj->setBaz(true);
 
         $this->assertEquals(
-            array('fooBar' => 'foobar'),
+            ['fooBar' => 'foobar'],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -486,35 +486,35 @@ class ObjectNormalizerTest extends TestCase
 
     private function doTestIgnoredAttributesDenormalize(bool $legacy = false)
     {
-        $ignoredAttributes = array('fooBar', 'bar', 'baz');
-        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer(array(ObjectNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes));
+        $ignoredAttributes = ['fooBar', 'bar', 'baz'];
+        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer([ObjectNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes]);
 
         $obj = new ObjectDummy();
         $obj->setFoo('foo');
 
         $this->assertEquals(
             $obj,
-            $this->normalizer->denormalize(array('fooBar' => 'fooBar', 'foo' => 'foo', 'baz' => 'baz'), __NAMESPACE__.'\ObjectDummy')
+            $this->normalizer->denormalize(['fooBar' => 'fooBar', 'foo' => 'foo', 'baz' => 'baz'], __NAMESPACE__.'\ObjectDummy')
         );
     }
 
     public function provideCallbacks()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'bar' => function ($bar) {
                         $this->assertEquals('baz', $bar);
 
                         return 'baz';
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => 'baz', 'baz' => true),
+                ['foo' => '', 'bar' => 'baz', 'baz' => true],
                 'Change a string',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($value, $object, $attributeName, $format, $context) {
                         $this->assertSame('baz', $value);
                         $this->assertInstanceOf(ObjectConstructorDummy::class, $object);
@@ -522,23 +522,23 @@ class ObjectNormalizerTest extends TestCase
                         $this->assertSame('any', $format);
                         $this->assertArrayHasKey('circular_reference_limit_counters', $context);
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => null, 'baz' => true),
+                ['foo' => '', 'bar' => null, 'baz' => true],
                 'Null an item',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bar) {
                         return $bar->format('d-m-Y H:i:s');
                     },
-                ),
+                ],
                 new \DateTime('2011-09-10 06:30:00'),
-                array('foo' => '', 'bar' => '10-09-2011 06:30:00', 'baz' => true),
+                ['foo' => '', 'bar' => '10-09-2011 06:30:00', 'baz' => true],
                 'Format a date',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         $foos = '';
                         foreach ($bars as $bar) {
@@ -547,22 +547,22 @@ class ObjectNormalizerTest extends TestCase
 
                         return $foos;
                     },
-                ),
-                array(new ObjectConstructorDummy('baz', '', false), new ObjectConstructorDummy('quux', '', false)),
-                array('foo' => '', 'bar' => 'bazquux', 'baz' => true),
+                ],
+                [new ObjectConstructorDummy('baz', '', false), new ObjectConstructorDummy('quux', '', false)],
+                ['foo' => '', 'bar' => 'bazquux', 'baz' => true],
                 'Collect a property',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         return \count($bars);
                     },
-                ),
-                array(new ObjectConstructorDummy('baz', '', false), new ObjectConstructorDummy('quux', '', false)),
-                array('foo' => '', 'bar' => 2, 'baz' => true),
+                ],
+                [new ObjectConstructorDummy('baz', '', false), new ObjectConstructorDummy('quux', '', false)],
+                ['foo' => '', 'bar' => 2, 'baz' => true],
                 'Count a property',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -599,8 +599,8 @@ class ObjectNormalizerTest extends TestCase
 
     private function doTestUnableToNormalizeCircularReference(bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer(array(ObjectNormalizer::CIRCULAR_REFERENCE_LIMIT => 2));
-        $serializer = new Serializer(array($this->normalizer));
+        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer([ObjectNormalizer::CIRCULAR_REFERENCE_LIMIT => 2]);
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $obj = new CircularReferenceDummy();
@@ -610,16 +610,16 @@ class ObjectNormalizerTest extends TestCase
 
     public function testSiblingReference()
     {
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $siblingHolder = new SiblingHolder();
 
-        $expected = array(
-            'sibling0' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling1' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling2' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-        );
+        $expected = [
+            'sibling0' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling1' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling2' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+        ];
         $this->assertEquals($expected, $this->normalizer->normalize($siblingHolder));
     }
 
@@ -640,7 +640,7 @@ class ObjectNormalizerTest extends TestCase
         }, $legacy);
 
         $obj = new CircularReferenceDummy();
-        $expected = array('me' => 'Symfony\Component\Serializer\Tests\Fixtures\CircularReferenceDummy');
+        $expected = ['me' => 'Symfony\Component\Serializer\Tests\Fixtures\CircularReferenceDummy'];
         $this->assertEquals($expected, $this->normalizer->normalize($obj));
 
         $this->createNormalizerWithCircularReferenceHandler(function ($obj, string $format, array $context) {
@@ -650,13 +650,13 @@ class ObjectNormalizerTest extends TestCase
 
             return \get_class($obj);
         }, $legacy);
-        $this->assertEquals($expected, $this->normalizer->normalize($obj, 'test', array('foo' => 'bar')));
+        $this->assertEquals($expected, $this->normalizer->normalize($obj, 'test', ['foo' => 'bar']));
     }
 
     private function createNormalizerWithCircularReferenceHandler(callable $handler, bool $legacy)
     {
-        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer(array(ObjectNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler));
-        $this->serializer = new Serializer(array($this->normalizer));
+        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer([ObjectNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler]);
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
     }
 
@@ -664,7 +664,7 @@ class ObjectNormalizerTest extends TestCase
     {
         $this->assertEquals(
             new ObjectDummy(),
-            $this->normalizer->denormalize(array('non_existing' => true), __NAMESPACE__.'\ObjectDummy')
+            $this->normalizer->denormalize(['non_existing' => true], __NAMESPACE__.'\ObjectDummy')
         );
     }
 
@@ -675,28 +675,28 @@ class ObjectNormalizerTest extends TestCase
 
     public function testNormalizeStatic()
     {
-        $this->assertEquals(array('foo' => 'K'), $this->normalizer->normalize(new ObjectWithStaticPropertiesAndMethods()));
+        $this->assertEquals(['foo' => 'K'], $this->normalizer->normalize(new ObjectWithStaticPropertiesAndMethods()));
     }
 
     public function testNormalizeUpperCaseAttributes()
     {
-        $this->assertEquals(array('Foo' => 'Foo', 'Bar' => 'BarBar'), $this->normalizer->normalize(new ObjectWithUpperCaseAttributeNames()));
+        $this->assertEquals(['Foo' => 'Foo', 'Bar' => 'BarBar'], $this->normalizer->normalize(new ObjectWithUpperCaseAttributeNames()));
     }
 
     public function testNormalizeNotSerializableContext()
     {
         $objectDummy = new ObjectDummy();
-        $expected = array(
+        $expected = [
             'foo' => null,
             'baz' => null,
             'fooBar' => '',
             'camelCase' => null,
             'object' => null,
             'bar' => null,
-        );
+        ];
 
-        $this->assertEquals($expected, $this->normalizer->normalize($objectDummy, null, array('not_serializable' => function () {
-        })));
+        $this->assertEquals($expected, $this->normalizer->normalize($objectDummy, null, ['not_serializable' => function () {
+        }]));
     }
 
     public function testMaxDepth()
@@ -723,41 +723,41 @@ class ObjectNormalizerTest extends TestCase
         $level2->child = $level3;
 
         $this->createNormalizerWithMaxDepthHandler(null, $legacy);
-        $result = $this->serializer->normalize($level1, null, array(ObjectNormalizer::ENABLE_MAX_DEPTH => true));
+        $result = $this->serializer->normalize($level1, null, [ObjectNormalizer::ENABLE_MAX_DEPTH => true]);
 
-        $expected = array(
+        $expected = [
             'bar' => null,
             'foo' => 'level1',
-            'child' => array(
+            'child' => [
                     'bar' => null,
                     'foo' => 'level2',
-                    'child' => array(
+                    'child' => [
                             'bar' => null,
                             'child' => null,
-                        ),
-                ),
-        );
+                        ],
+                ],
+        ];
 
         $this->assertEquals($expected, $result);
 
-        $expected = array(
+        $expected = [
             'bar' => null,
             'foo' => 'level1',
-            'child' => array(
+            'child' => [
                 'bar' => null,
                 'foo' => 'level2',
-                'child' => array(
+                'child' => [
                     'bar' => null,
                     'child' => null,
                     'foo' => 'handler',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
         $this->createNormalizerWithMaxDepthHandler(function () {
             return 'handler';
         }, $legacy);
-        $result = $this->serializer->normalize($level1, null, array(ObjectNormalizer::ENABLE_MAX_DEPTH => true));
+        $result = $this->serializer->normalize($level1, null, [ObjectNormalizer::ENABLE_MAX_DEPTH => true]);
         $this->assertEquals($expected, $result);
 
         $this->createNormalizerWithMaxDepthHandler(function ($object, $parentObject, $attributeName, $format, $context) {
@@ -769,21 +769,21 @@ class ObjectNormalizerTest extends TestCase
 
             return 'handler';
         }, $legacy);
-        $this->serializer->normalize($level1, 'test', array(ObjectNormalizer::ENABLE_MAX_DEPTH => true));
+        $this->serializer->normalize($level1, 'test', [ObjectNormalizer::ENABLE_MAX_DEPTH => true]);
     }
 
     private function createNormalizerWithMaxDepthHandler(callable $handler = null, bool $legacy = false)
     {
         $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
         if ($legacy) {
-            $this->createNormalizer(array(), $classMetadataFactory);
+            $this->createNormalizer([], $classMetadataFactory);
             if (null !== $handler) {
                 $this->normalizer->setMaxDepthHandler($handler);
             }
         } else {
-            $this->createNormalizer(array(ObjectNormalizer::MAX_DEPTH_HANDLER => $handler), $classMetadataFactory);
+            $this->createNormalizer([ObjectNormalizer::MAX_DEPTH_HANDLER => $handler], $classMetadataFactory);
         }
-        $this->serializer = new Serializer(array($this->normalizer));
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
     }
 
@@ -792,20 +792,20 @@ class ObjectNormalizerTest extends TestCase
      */
     public function testThrowUnexpectedValueException()
     {
-        $this->normalizer->denormalize(array('foo' => 'bar'), ObjectTypeHinted::class);
+        $this->normalizer->denormalize(['foo' => 'bar'], ObjectTypeHinted::class);
     }
 
     public function testDenomalizeRecursive()
     {
-        $extractor = new PropertyInfoExtractor(array(), array(new PhpDocExtractor(), new ReflectionExtractor()));
+        $extractor = new PropertyInfoExtractor([], [new PhpDocExtractor(), new ReflectionExtractor()]);
         $normalizer = new ObjectNormalizer(null, null, null, $extractor);
-        $serializer = new Serializer(array(new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer));
+        $serializer = new Serializer([new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer]);
 
-        $obj = $serializer->denormalize(array(
-            'inner' => array('foo' => 'foo', 'bar' => 'bar'),
+        $obj = $serializer->denormalize([
+            'inner' => ['foo' => 'foo', 'bar' => 'bar'],
             'date' => '1988/01/21',
-            'inners' => array(array('foo' => 1), array('foo' => 2)),
-        ), ObjectOuter::class);
+            'inners' => [['foo' => 1], ['foo' => 2]],
+        ], ObjectOuter::class);
 
         $this->assertSame('foo', $obj->getInner()->foo);
         $this->assertSame('bar', $obj->getInner()->bar);
@@ -816,12 +816,12 @@ class ObjectNormalizerTest extends TestCase
 
     public function testAcceptJsonNumber()
     {
-        $extractor = new PropertyInfoExtractor(array(), array(new PhpDocExtractor(), new ReflectionExtractor()));
+        $extractor = new PropertyInfoExtractor([], [new PhpDocExtractor(), new ReflectionExtractor()]);
         $normalizer = new ObjectNormalizer(null, null, null, $extractor);
-        $serializer = new Serializer(array(new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer));
+        $serializer = new Serializer([new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer]);
 
-        $this->assertSame(10.0, $serializer->denormalize(array('number' => 10), JsonNumber::class, 'json')->number);
-        $this->assertSame(10.0, $serializer->denormalize(array('number' => 10), JsonNumber::class, 'jsonld')->number);
+        $this->assertSame(10.0, $serializer->denormalize(['number' => 10], JsonNumber::class, 'json')->number);
+        $this->assertSame(10.0, $serializer->denormalize(['number' => 10], JsonNumber::class, 'jsonld')->number);
     }
 
     /**
@@ -831,9 +831,9 @@ class ObjectNormalizerTest extends TestCase
     public function testRejectInvalidType()
     {
         $normalizer = new ObjectNormalizer(null, null, null, new ReflectionExtractor());
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
 
-        $serializer->denormalize(array('date' => 'foo'), ObjectOuter::class);
+        $serializer->denormalize(['date' => 'foo'], ObjectOuter::class);
     }
 
     /**
@@ -842,21 +842,21 @@ class ObjectNormalizerTest extends TestCase
      */
     public function testRejectInvalidKey()
     {
-        $extractor = new PropertyInfoExtractor(array(), array(new PhpDocExtractor(), new ReflectionExtractor()));
+        $extractor = new PropertyInfoExtractor([], [new PhpDocExtractor(), new ReflectionExtractor()]);
         $normalizer = new ObjectNormalizer(null, null, null, $extractor);
-        $serializer = new Serializer(array(new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer));
+        $serializer = new Serializer([new ArrayDenormalizer(), new DateTimeNormalizer(), $normalizer]);
 
-        $serializer->denormalize(array('inners' => array('a' => array('foo' => 1))), ObjectOuter::class);
+        $serializer->denormalize(['inners' => ['a' => ['foo' => 1]]], ObjectOuter::class);
     }
 
     public function testDoNotRejectInvalidTypeOnDisableTypeEnforcementContextOption()
     {
-        $extractor = new PropertyInfoExtractor(array(), array(new PhpDocExtractor()));
+        $extractor = new PropertyInfoExtractor([], [new PhpDocExtractor()]);
         $normalizer = new ObjectNormalizer(null, null, null, $extractor);
-        $serializer = new Serializer(array($normalizer));
-        $context = array(ObjectNormalizer::DISABLE_TYPE_ENFORCEMENT => true);
+        $serializer = new Serializer([$normalizer]);
+        $context = [ObjectNormalizer::DISABLE_TYPE_ENFORCEMENT => true];
 
-        $this->assertSame('foo', $serializer->denormalize(array('number' => 'foo'), JsonNumber::class, null, $context)->number);
+        $this->assertSame('foo', $serializer->denormalize(['number' => 'foo'], JsonNumber::class, null, $context)->number);
     }
 
     public function testExtractAttributesRespectsFormat()
@@ -867,7 +867,7 @@ class ObjectNormalizerTest extends TestCase
         $data->setFoo('bar');
         $data->bar = 'foo';
 
-        $this->assertSame(array('foo' => 'bar', 'bar' => 'foo'), $normalizer->normalize($data, 'foo_and_bar_included'));
+        $this->assertSame(['foo' => 'bar', 'bar' => 'foo'], $normalizer->normalize($data, 'foo_and_bar_included'));
     }
 
     public function testExtractAttributesRespectsContext()
@@ -878,13 +878,13 @@ class ObjectNormalizerTest extends TestCase
         $data->setFoo('bar');
         $data->bar = 'foo';
 
-        $this->assertSame(array('foo' => 'bar', 'bar' => 'foo'), $normalizer->normalize($data, null, array('include_foo_and_bar' => true)));
+        $this->assertSame(['foo' => 'bar', 'bar' => 'foo'], $normalizer->normalize($data, null, ['include_foo_and_bar' => true]));
     }
 
     public function testAttributesContextNormalize()
     {
         $normalizer = new ObjectNormalizer();
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
 
         $objectInner = new ObjectInner();
         $objectInner->foo = 'innerFoo';
@@ -895,23 +895,23 @@ class ObjectNormalizerTest extends TestCase
         $objectDummy->setBaz(true);
         $objectDummy->setObject($objectInner);
 
-        $context = array('attributes' => array('foo', 'baz', 'object' => array('foo')));
+        $context = ['attributes' => ['foo', 'baz', 'object' => ['foo']]];
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'foo',
                 'baz' => true,
-                'object' => array('foo' => 'innerFoo'),
-            ),
+                'object' => ['foo' => 'innerFoo'],
+            ],
             $serializer->normalize($objectDummy, null, $context)
         );
 
-        $context = array('attributes' => array('foo', 'baz', 'object'));
+        $context = ['attributes' => ['foo', 'baz', 'object']];
         $this->assertEquals(
-            array(
+            [
                 'foo' => 'foo',
                 'baz' => true,
-                'object' => array('foo' => 'innerFoo', 'bar' => 'innerBar'),
-            ),
+                'object' => ['foo' => 'innerFoo', 'bar' => 'innerBar'],
+            ],
             $serializer->normalize($objectDummy, null, $context)
         );
     }
@@ -919,7 +919,7 @@ class ObjectNormalizerTest extends TestCase
     public function testAttributesContextDenormalize()
     {
         $normalizer = new ObjectNormalizer(null, null, null, new ReflectionExtractor());
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
 
         $objectInner = new ObjectInner();
         $objectInner->foo = 'innerFoo';
@@ -928,38 +928,38 @@ class ObjectNormalizerTest extends TestCase
         $objectOuter->bar = 'bar';
         $objectOuter->setInner($objectInner);
 
-        $context = array('attributes' => array('bar', 'inner' => array('foo')));
+        $context = ['attributes' => ['bar', 'inner' => ['foo']]];
         $this->assertEquals($objectOuter, $serializer->denormalize(
-            array(
+            [
                 'foo' => 'foo',
                 'bar' => 'bar',
                 'date' => '2017-02-03',
-                'inner' => array('foo' => 'innerFoo', 'bar' => 'innerBar'),
-            ), ObjectOuter::class, null, $context));
+                'inner' => ['foo' => 'innerFoo', 'bar' => 'innerBar'],
+            ], ObjectOuter::class, null, $context));
     }
 
     public function testAttributesContextDenormalizeConstructor()
     {
         $normalizer = new ObjectNormalizer(null, null, null, new ReflectionExtractor());
-        $serializer = new Serializer(array($normalizer));
+        $serializer = new Serializer([$normalizer]);
 
         $objectInner = new ObjectInner();
         $objectInner->bar = 'bar';
 
         $obj = new DummyWithConstructorObjectAndDefaultValue('a', $objectInner);
 
-        $context = array('attributes' => array('inner' => array('bar')));
-        $this->assertEquals($obj, $serializer->denormalize(array(
+        $context = ['attributes' => ['inner' => ['bar']]];
+        $this->assertEquals($obj, $serializer->denormalize([
             'foo' => 'b',
-            'inner' => array('foo' => 'foo', 'bar' => 'bar'),
-        ), DummyWithConstructorObjectAndDefaultValue::class, null, $context));
+            'inner' => ['foo' => 'foo', 'bar' => 'bar'],
+        ], DummyWithConstructorObjectAndDefaultValue::class, null, $context));
     }
 
     public function testNormalizeSameObjectWithDifferentAttributes()
     {
         $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
         $this->normalizer = new ObjectNormalizer($classMetadataFactory);
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $dummy = new ObjectOuter();
@@ -971,37 +971,37 @@ class ObjectNormalizerTest extends TestCase
         $dummy->bar->foo = 'bar.foo';
         $dummy->bar->bar = 'bar.bar';
 
-        $this->assertEquals(array(
-            'foo' => array(
+        $this->assertEquals([
+            'foo' => [
                 'bar' => 'foo.bar',
-            ),
-            'bar' => array(
+            ],
+            'bar' => [
                 'foo' => 'bar.foo',
-            ),
-        ), $this->normalizer->normalize($dummy, 'json', array(
-            'attributes' => array(
-                'foo' => array('bar'),
-                'bar' => array('foo'),
-            ),
-        )));
+            ],
+        ], $this->normalizer->normalize($dummy, 'json', [
+            'attributes' => [
+                'foo' => ['bar'],
+                'bar' => ['foo'],
+            ],
+        ]));
     }
 
     public function testAdvancedNameConverter()
     {
         $nameConverter = new class() implements AdvancedNameConverterInterface {
-            public function normalize($propertyName, string $class = null, string $format = null, array $context = array())
+            public function normalize($propertyName, string $class = null, string $format = null, array $context = [])
             {
                 return sprintf('%s-%s-%s-%s', $propertyName, $class, $format, $context['foo']);
             }
 
-            public function denormalize($propertyName, string $class = null, string $format = null, array $context = array())
+            public function denormalize($propertyName, string $class = null, string $format = null, array $context = [])
             {
                 return sprintf('%s-%s-%s-%s', $propertyName, $class, $format, $context['foo']);
             }
         };
 
         $normalizer = new ObjectNormalizer(null, $nameConverter);
-        $this->assertArrayHasKey('foo-Symfony\Component\Serializer\Tests\Normalizer\ObjectDummy-json-bar', $normalizer->normalize(new ObjectDummy(), 'json', array('foo' => 'bar')));
+        $this->assertArrayHasKey('foo-Symfony\Component\Serializer\Tests\Normalizer\ObjectDummy-json-bar', $normalizer->normalize(new ObjectDummy(), 'json', ['foo' => 'bar']));
     }
 }
 
@@ -1103,7 +1103,7 @@ class ObjectConstructorOptionalArgsDummy
     public $bar;
     private $baz;
 
-    public function __construct($foo, $bar = array(), $baz = array())
+    public function __construct($foo, $bar = [], $baz = [])
     {
         $this->foo = $foo;
         $this->bar = $bar;
@@ -1131,7 +1131,7 @@ class ObjectConstructorArgsWithDefaultValueDummy
     protected $foo;
     protected $bar;
 
-    public function __construct($foo = array(), $bar)
+    public function __construct($foo = [], $bar)
     {
         $this->foo = $foo;
         $this->bar = $bar;
@@ -1222,13 +1222,13 @@ class ObjectInner
 
 class FormatAndContextAwareNormalizer extends ObjectNormalizer
 {
-    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = array())
+    protected function isAllowedAttribute($classOrObject, $attribute, $format = null, array $context = [])
     {
-        if (\in_array($attribute, array('foo', 'bar')) && 'foo_and_bar_included' === $format) {
+        if (\in_array($attribute, ['foo', 'bar']) && 'foo_and_bar_included' === $format) {
             return true;
         }
 
-        if (\in_array($attribute, array('foo', 'bar')) && isset($context['include_foo_and_bar']) && true === $context['include_foo_and_bar']) {
+        if (\in_array($attribute, ['foo', 'bar']) && isset($context['include_foo_and_bar']) && true === $context['include_foo_and_bar']) {
             return true;
         }
 
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectToPopulateTraitTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectToPopulateTraitTest.php
index def71e5def..aa924be0dc 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectToPopulateTraitTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/ObjectToPopulateTraitTest.php
@@ -12,25 +12,25 @@ class ObjectToPopulateTraitTest extends TestCase
 
     public function testExtractObjectToPopulateReturnsNullWhenKeyIsMissing()
     {
-        $object = $this->extractObjectToPopulate(ProxyDummy::class, array());
+        $object = $this->extractObjectToPopulate(ProxyDummy::class, []);
 
         $this->assertNull($object);
     }
 
     public function testExtractObjectToPopulateReturnsNullWhenNonObjectIsProvided()
     {
-        $object = $this->extractObjectToPopulate(ProxyDummy::class, array(
+        $object = $this->extractObjectToPopulate(ProxyDummy::class, [
             'object_to_populate' => 'not an object',
-        ));
+        ]);
 
         $this->assertNull($object);
     }
 
     public function testExtractObjectToPopulateReturnsNullWhenTheClassIsNotAnInstanceOfTheProvidedClass()
     {
-        $object = $this->extractObjectToPopulate(ProxyDummy::class, array(
+        $object = $this->extractObjectToPopulate(ProxyDummy::class, [
             'object_to_populate' => new \stdClass(),
-        ));
+        ]);
 
         $this->assertNull($object);
     }
@@ -38,9 +38,9 @@ class ObjectToPopulateTraitTest extends TestCase
     public function testExtractObjectToPopulateReturnsObjectWhenEverythingChecksOut()
     {
         $expected = new ProxyDummy();
-        $object = $this->extractObjectToPopulate(ProxyDummy::class, array(
+        $object = $this->extractObjectToPopulate(ProxyDummy::class, [
             'object_to_populate' => $expected,
-        ));
+        ]);
 
         $this->assertSame($expected, $object);
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
index 091421f072..26bccdfcad 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/PropertyNormalizerTest.php
@@ -41,7 +41,7 @@ class PropertyNormalizerTest extends TestCase
         $this->createNormalizer();
     }
 
-    private function createNormalizer(array $defaultContext = array())
+    private function createNormalizer(array $defaultContext = [])
     {
         $this->serializer = $this->getMockBuilder('Symfony\Component\Serializer\SerializerInterface')->getMock();
         $this->normalizer = new PropertyNormalizer(null, null, null, null, null, $defaultContext);
@@ -55,7 +55,7 @@ class PropertyNormalizerTest extends TestCase
         $obj->setBar('bar');
         $obj->setCamelCase('camelcase');
         $this->assertEquals(
-            array('foo' => 'foo', 'bar' => 'bar', 'camelCase' => 'camelcase'),
+            ['foo' => 'foo', 'bar' => 'bar', 'camelCase' => 'camelcase'],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -63,7 +63,7 @@ class PropertyNormalizerTest extends TestCase
     public function testDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar'),
+            ['foo' => 'foo', 'bar' => 'bar'],
             __NAMESPACE__.'\PropertyDummy',
             'any'
         );
@@ -80,7 +80,7 @@ class PropertyNormalizerTest extends TestCase
         $group->setKevin('Kevin');
         $group->setCoopTilleuls('coop');
         $this->assertEquals(
-            array('foo' => 'foo', 'bar' => 'bar', 'kevin' => 'Kevin', 'coopTilleuls' => 'coop', 'fooBar' => null, 'symfony' => null, 'baz' => 'baz'),
+            ['foo' => 'foo', 'bar' => 'bar', 'kevin' => 'Kevin', 'coopTilleuls' => 'coop', 'fooBar' => null, 'symfony' => null, 'baz' => 'baz'],
             $this->normalizer->normalize($group, 'any')
         );
     }
@@ -88,7 +88,7 @@ class PropertyNormalizerTest extends TestCase
     public function testDenormalizeWithParentClass()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar', 'kevin' => 'Kevin', 'baz' => 'baz'),
+            ['foo' => 'foo', 'bar' => 'bar', 'kevin' => 'Kevin', 'baz' => 'baz'],
             GroupDummyChild::class,
             'any'
         );
@@ -102,7 +102,7 @@ class PropertyNormalizerTest extends TestCase
     public function testConstructorDenormalize()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => 'foo', 'bar' => 'bar'),
+            ['foo' => 'foo', 'bar' => 'bar'],
             __NAMESPACE__.'\PropertyConstructorDummy',
             'any'
         );
@@ -113,7 +113,7 @@ class PropertyNormalizerTest extends TestCase
     public function testConstructorDenormalizeWithNullArgument()
     {
         $obj = $this->normalizer->denormalize(
-            array('foo' => null, 'bar' => 'bar'),
+            ['foo' => null, 'bar' => 'bar'],
             __NAMESPACE__.'\PropertyConstructorDummy', '
             any'
         );
@@ -139,7 +139,7 @@ class PropertyNormalizerTest extends TestCase
 
     private function doTestCallbacks($callbacks, $value, $result, $message, bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(PropertyNormalizer::CALLBACKS => $callbacks));
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([PropertyNormalizer::CALLBACKS => $callbacks]);
 
         $obj = new PropertyConstructorDummy('', $value);
 
@@ -171,8 +171,8 @@ class PropertyNormalizerTest extends TestCase
      */
     private function doTestUncallableCallbacks(bool $legacy = false)
     {
-        $callbacks = array('bar' => null);
-        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer(array(PropertyNormalizer::CALLBACKS => $callbacks));
+        $callbacks = ['bar' => null];
+        $legacy ? $this->normalizer->setCallbacks($callbacks) : $this->createNormalizer([PropertyNormalizer::CALLBACKS => $callbacks]);
 
         $obj = new PropertyConstructorDummy('baz', 'quux');
 
@@ -191,15 +191,15 @@ class PropertyNormalizerTest extends TestCase
 
     private function doTestIgnoredAttributes(bool $legacy = false)
     {
-        $ignoredAttributes = array('foo', 'bar', 'camelCase');
-        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer(array(PropertyNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes));
+        $ignoredAttributes = ['foo', 'bar', 'camelCase'];
+        $legacy ? $this->normalizer->setIgnoredAttributes($ignoredAttributes) : $this->createNormalizer([PropertyNormalizer::IGNORED_ATTRIBUTES => $ignoredAttributes]);
 
         $obj = new PropertyDummy();
         $obj->foo = 'foo';
         $obj->setBar('bar');
 
         $this->assertEquals(
-            array(),
+            [],
             $this->normalizer->normalize($obj, 'any')
         );
     }
@@ -218,19 +218,19 @@ class PropertyNormalizerTest extends TestCase
         $obj->setKevin('kevin');
         $obj->setCoopTilleuls('coopTilleuls');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'bar' => 'bar',
-        ), $this->normalizer->normalize($obj, null, array(PropertyNormalizer::GROUPS => array('c'))));
+        ], $this->normalizer->normalize($obj, null, [PropertyNormalizer::GROUPS => ['c']]));
 
         // The PropertyNormalizer is also able to hydrate properties from parent classes
-        $this->assertEquals(array(
+        $this->assertEquals([
             'symfony' => 'symfony',
             'foo' => 'foo',
             'fooBar' => 'fooBar',
             'bar' => 'bar',
             'kevin' => 'kevin',
             'coopTilleuls' => 'coopTilleuls',
-        ), $this->normalizer->normalize($obj, null, array(PropertyNormalizer::GROUPS => array('a', 'c'))));
+        ], $this->normalizer->normalize($obj, null, [PropertyNormalizer::GROUPS => ['a', 'c']]));
     }
 
     public function testGroupsDenormalize()
@@ -242,13 +242,13 @@ class PropertyNormalizerTest extends TestCase
         $obj = new GroupDummy();
         $obj->setFoo('foo');
 
-        $toNormalize = array('foo' => 'foo', 'bar' => 'bar');
+        $toNormalize = ['foo' => 'foo', 'bar' => 'bar'];
 
         $normalized = $this->normalizer->denormalize(
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(PropertyNormalizer::GROUPS => array('a'))
+            [PropertyNormalizer::GROUPS => ['a']]
         );
         $this->assertEquals($obj, $normalized);
 
@@ -258,7 +258,7 @@ class PropertyNormalizerTest extends TestCase
             $toNormalize,
             'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy',
             null,
-            array(PropertyNormalizer::GROUPS => array('a', 'b'))
+            [PropertyNormalizer::GROUPS => ['a', 'b']]
         );
         $this->assertEquals($obj, $normalized);
     }
@@ -275,12 +275,12 @@ class PropertyNormalizerTest extends TestCase
         $obj->setCoopTilleuls('les-tilleuls.coop');
 
         $this->assertEquals(
-            array(
+            [
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
-            ),
-            $this->normalizer->normalize($obj, null, array(PropertyNormalizer::GROUPS => array('name_converter')))
+            ],
+            $this->normalizer->normalize($obj, null, [PropertyNormalizer::GROUPS => ['name_converter']])
         );
     }
 
@@ -296,49 +296,49 @@ class PropertyNormalizerTest extends TestCase
 
         $this->assertEquals(
             $obj,
-            $this->normalizer->denormalize(array(
+            $this->normalizer->denormalize([
                 'bar' => null,
                 'foo_bar' => '@dunglas',
                 'symfony' => '@coopTilleuls',
                 'coop_tilleuls' => 'les-tilleuls.coop',
-            ), 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, array(PropertyNormalizer::GROUPS => array('name_converter')))
+            ], 'Symfony\Component\Serializer\Tests\Fixtures\GroupDummy', null, [PropertyNormalizer::GROUPS => ['name_converter']])
         );
     }
 
     public function provideCallbacks()
     {
-        return array(
-            array(
-                array(
+        return [
+            [
+                [
                     'bar' => function ($bar) {
                         return 'baz';
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => 'baz'),
+                ['foo' => '', 'bar' => 'baz'],
                 'Change a string',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bar) {
                     },
-                ),
+                ],
                 'baz',
-                array('foo' => '', 'bar' => null),
+                ['foo' => '', 'bar' => null],
                 'Null an item',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bar) {
                         return $bar->format('d-m-Y H:i:s');
                     },
-                ),
+                ],
                 new \DateTime('2011-09-10 06:30:00'),
-                array('foo' => '', 'bar' => '10-09-2011 06:30:00'),
+                ['foo' => '', 'bar' => '10-09-2011 06:30:00'],
                 'Format a date',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         $foos = '';
                         foreach ($bars as $bar) {
@@ -347,22 +347,22 @@ class PropertyNormalizerTest extends TestCase
 
                         return $foos;
                     },
-                ),
-                array(new PropertyConstructorDummy('baz', ''), new PropertyConstructorDummy('quux', '')),
-                array('foo' => '', 'bar' => 'bazquux'),
+                ],
+                [new PropertyConstructorDummy('baz', ''), new PropertyConstructorDummy('quux', '')],
+                ['foo' => '', 'bar' => 'bazquux'],
                 'Collect a property',
-            ),
-            array(
-                array(
+            ],
+            [
+                [
                     'bar' => function ($bars) {
                         return \count($bars);
                     },
-                ),
-                array(new PropertyConstructorDummy('baz', ''), new PropertyConstructorDummy('quux', '')),
-                array('foo' => '', 'bar' => 2),
+                ],
+                [new PropertyConstructorDummy('baz', ''), new PropertyConstructorDummy('quux', '')],
+                ['foo' => '', 'bar' => 2],
                 'Count a property',
-            ),
-        );
+            ],
+        ];
     }
 
     /**
@@ -383,8 +383,8 @@ class PropertyNormalizerTest extends TestCase
 
     private function doTestUnableToNormalizeCircularReference(bool $legacy = false)
     {
-        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer(array(PropertyNormalizer::CIRCULAR_REFERENCE_LIMIT => 2));
-        $this->serializer = new Serializer(array($this->normalizer));
+        $legacy ? $this->normalizer->setCircularReferenceLimit(2) : $this->createNormalizer([PropertyNormalizer::CIRCULAR_REFERENCE_LIMIT => 2]);
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
 
         $obj = new PropertyCircularReferenceDummy();
@@ -394,16 +394,16 @@ class PropertyNormalizerTest extends TestCase
 
     public function testSiblingReference()
     {
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $siblingHolder = new PropertySiblingHolder();
 
-        $expected = array(
-            'sibling0' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling1' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-            'sibling2' => array('coopTilleuls' => 'Les-Tilleuls.coop'),
-        );
+        $expected = [
+            'sibling0' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling1' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+            'sibling2' => ['coopTilleuls' => 'Les-Tilleuls.coop'],
+        ];
         $this->assertEquals($expected, $this->normalizer->normalize($siblingHolder));
     }
 
@@ -422,14 +422,14 @@ class PropertyNormalizerTest extends TestCase
         $handler = function ($obj) {
             return \get_class($obj);
         };
-        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer(array(PropertyNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler));
+        $legacy ? $this->normalizer->setCircularReferenceHandler($handler) : $this->createNormalizer([PropertyNormalizer::CIRCULAR_REFERENCE_HANDLER => $handler]);
 
-        $this->serializer = new Serializer(array($this->normalizer));
+        $this->serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($this->serializer);
 
         $obj = new PropertyCircularReferenceDummy();
 
-        $expected = array('me' => 'Symfony\Component\Serializer\Tests\Fixtures\PropertyCircularReferenceDummy');
+        $expected = ['me' => 'Symfony\Component\Serializer\Tests\Fixtures\PropertyCircularReferenceDummy'];
         $this->assertEquals($expected, $this->normalizer->normalize($obj));
     }
 
@@ -437,13 +437,13 @@ class PropertyNormalizerTest extends TestCase
     {
         $this->assertEquals(
             new PropertyDummy(),
-            $this->normalizer->denormalize(array('non_existing' => true), __NAMESPACE__.'\PropertyDummy')
+            $this->normalizer->denormalize(['non_existing' => true], __NAMESPACE__.'\PropertyDummy')
         );
     }
 
     public function testDenormalizeShouldIgnoreStaticProperty()
     {
-        $obj = $this->normalizer->denormalize(array('outOfScope' => true), __NAMESPACE__.'\PropertyDummy');
+        $obj = $this->normalizer->denormalize(['outOfScope' => true], __NAMESPACE__.'\PropertyDummy');
 
         $this->assertEquals(new PropertyDummy(), $obj);
         $this->assertEquals('out_of_scope', PropertyDummy::$outOfScope);
@@ -479,7 +479,7 @@ class PropertyNormalizerTest extends TestCase
     {
         $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
         $this->normalizer = new PropertyNormalizer($classMetadataFactory);
-        $serializer = new Serializer(array($this->normalizer));
+        $serializer = new Serializer([$this->normalizer]);
         $this->normalizer->setSerializer($serializer);
 
         $level1 = new MaxDepthDummy();
@@ -493,20 +493,20 @@ class PropertyNormalizerTest extends TestCase
         $level3->foo = 'level3';
         $level2->child = $level3;
 
-        $result = $serializer->normalize($level1, null, array(PropertyNormalizer::ENABLE_MAX_DEPTH => true));
+        $result = $serializer->normalize($level1, null, [PropertyNormalizer::ENABLE_MAX_DEPTH => true]);
 
-        $expected = array(
+        $expected = [
             'foo' => 'level1',
-            'child' => array(
+            'child' => [
                     'foo' => 'level2',
-                    'child' => array(
+                    'child' => [
                             'child' => null,
                             'bar' => null,
-                        ),
+                        ],
                     'bar' => null,
-                ),
+                ],
             'bar' => null,
-        );
+        ];
 
         $this->assertEquals($expected, $result);
     }
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/TestDenormalizer.php b/src/Symfony/Component/Serializer/Tests/Normalizer/TestDenormalizer.php
index 7525d5c928..036d2bb84c 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/TestDenormalizer.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/TestDenormalizer.php
@@ -23,7 +23,7 @@ class TestDenormalizer implements DenormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $class, $format = null, array $context = array())
+    public function denormalize($data, $class, $format = null, array $context = [])
     {
     }
 
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/TestNormalizer.php b/src/Symfony/Component/Serializer/Tests/Normalizer/TestNormalizer.php
index 4b29e8fa5d..ea57d2dfff 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/TestNormalizer.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/TestNormalizer.php
@@ -23,7 +23,7 @@ class TestNormalizer implements NormalizerInterface
     /**
      * {@inheritdoc}
      */
-    public function normalize($object, $format = null, array $context = array())
+    public function normalize($object, $format = null, array $context = [])
     {
     }
 
diff --git a/src/Symfony/Component/Serializer/Tests/SerializerTest.php b/src/Symfony/Component/Serializer/Tests/SerializerTest.php
index 72344cf72a..ce6be57f33 100644
--- a/src/Symfony/Component/Serializer/Tests/SerializerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/SerializerTest.php
@@ -61,7 +61,7 @@ class SerializerTest extends TestCase
      */
     public function testDeprecationErrorOnInvalidNormalizer()
     {
-        new Serializer(array(new \stdClass()));
+        new Serializer([new \stdClass()]);
     }
 
     /**
@@ -70,7 +70,7 @@ class SerializerTest extends TestCase
      */
     public function testDeprecationErrorOnInvalidEncoder()
     {
-        new Serializer(array(), array(new \stdClass()));
+        new Serializer([], [new \stdClass()]);
     }
 
     /**
@@ -78,20 +78,20 @@ class SerializerTest extends TestCase
      */
     public function testNormalizeNoMatch()
     {
-        $serializer = new Serializer(array($this->getMockBuilder('Symfony\Component\Serializer\Normalizer\CustomNormalizer')->getMock()));
+        $serializer = new Serializer([$this->getMockBuilder('Symfony\Component\Serializer\Normalizer\CustomNormalizer')->getMock()]);
         $serializer->normalize(new \stdClass(), 'xml');
     }
 
     public function testNormalizeTraversable()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
         $result = $serializer->serialize(new TraversableDummy(), 'json');
         $this->assertEquals('{"foo":"foo","bar":"bar"}', $result);
     }
 
     public function testNormalizeGivesPriorityToInterfaceOverTraversable()
     {
-        $serializer = new Serializer(array(new CustomNormalizer()), array('json' => new JsonEncoder()));
+        $serializer = new Serializer([new CustomNormalizer()], ['json' => new JsonEncoder()]);
         $result = $serializer->serialize(new NormalizableTraversableDummy(), 'json');
         $this->assertEquals('{"foo":"normalizedFoo","bar":"normalizedBar"}', $result);
     }
@@ -101,7 +101,7 @@ class SerializerTest extends TestCase
      */
     public function testNormalizeOnDenormalizer()
     {
-        $serializer = new Serializer(array(new TestDenormalizer()), array());
+        $serializer = new Serializer([new TestDenormalizer()], []);
         $this->assertTrue($serializer->normalize(new \stdClass(), 'json'));
     }
 
@@ -110,7 +110,7 @@ class SerializerTest extends TestCase
      */
     public function testDenormalizeNoMatch()
     {
-        $serializer = new Serializer(array($this->getMockBuilder('Symfony\Component\Serializer\Normalizer\CustomNormalizer')->getMock()));
+        $serializer = new Serializer([$this->getMockBuilder('Symfony\Component\Serializer\Normalizer\CustomNormalizer')->getMock()]);
         $serializer->denormalize('foo', 'stdClass');
     }
 
@@ -119,17 +119,17 @@ class SerializerTest extends TestCase
      */
     public function testDenormalizeOnNormalizer()
     {
-        $serializer = new Serializer(array(new TestNormalizer()), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new TestNormalizer()], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $this->assertTrue($serializer->denormalize(json_encode($data), 'stdClass', 'json'));
     }
 
     public function testCustomNormalizerCanNormalizeCollectionsAndScalar()
     {
-        $serializer = new Serializer(array(new TestNormalizer()), array());
-        $this->assertNull($serializer->normalize(array('a', 'b')));
-        $this->assertNull($serializer->normalize(new \ArrayObject(array('c', 'd'))));
-        $this->assertNull($serializer->normalize(array()));
+        $serializer = new Serializer([new TestNormalizer()], []);
+        $this->assertNull($serializer->normalize(['a', 'b']));
+        $this->assertNull($serializer->normalize(new \ArrayObject(['c', 'd'])));
+        $this->assertNull($serializer->normalize([]));
         $this->assertNull($serializer->normalize('test'));
     }
 
@@ -147,7 +147,7 @@ class SerializerTest extends TestCase
             ->willReturn(true);
         $normalizer2->method('normalize')->willReturn('test2');
 
-        $serializer = new Serializer(array($normalizer1, $normalizer2));
+        $serializer = new Serializer([$normalizer1, $normalizer2]);
 
         $data = new \stdClass();
         $data->test = true;
@@ -170,32 +170,32 @@ class SerializerTest extends TestCase
             ->willReturn(true);
         $denormalizer2->method('denormalize')->willReturn('test2');
 
-        $serializer = new Serializer(array($denormalizer1, $denormalizer2));
+        $serializer = new Serializer([$denormalizer1, $denormalizer2]);
 
-        $this->assertEquals('test1', $serializer->denormalize(array('test1' => true), 'test'));
+        $this->assertEquals('test1', $serializer->denormalize(['test1' => true], 'test'));
 
-        $this->assertEquals('test2', $serializer->denormalize(array(), 'test'));
+        $this->assertEquals('test2', $serializer->denormalize([], 'test'));
     }
 
     public function testSerialize()
     {
-        $serializer = new Serializer(array(new GetSetMethodNormalizer()), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new GetSetMethodNormalizer()], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $result = $serializer->serialize(Model::fromArray($data), 'json');
         $this->assertEquals(json_encode($data), $result);
     }
 
     public function testSerializeScalar()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
         $result = $serializer->serialize('foo', 'json');
         $this->assertEquals('"foo"', $result);
     }
 
     public function testSerializeArrayOfScalars()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
-        $data = array('foo', array(5, 3));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
+        $data = ['foo', [5, 3]];
         $result = $serializer->serialize($data, 'json');
         $this->assertEquals(json_encode($data), $result);
     }
@@ -205,8 +205,8 @@ class SerializerTest extends TestCase
      */
     public function testSerializeNoEncoder()
     {
-        $serializer = new Serializer(array(), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->serialize($data, 'json');
     }
 
@@ -215,25 +215,25 @@ class SerializerTest extends TestCase
      */
     public function testSerializeNoNormalizer()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->serialize(Model::fromArray($data), 'json');
     }
 
     public function testDeserialize()
     {
-        $serializer = new Serializer(array(new GetSetMethodNormalizer()), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new GetSetMethodNormalizer()], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $result = $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
         $this->assertEquals($data, $result->toArray());
     }
 
     public function testDeserializeUseCache()
     {
-        $serializer = new Serializer(array(new GetSetMethodNormalizer()), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new GetSetMethodNormalizer()], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
-        $data = array('title' => 'bar', 'numbers' => array(2, 8));
+        $data = ['title' => 'bar', 'numbers' => [2, 8]];
         $result = $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
         $this->assertEquals($data, $result->toArray());
     }
@@ -243,8 +243,8 @@ class SerializerTest extends TestCase
      */
     public function testDeserializeNoNormalizer()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
     }
 
@@ -253,8 +253,8 @@ class SerializerTest extends TestCase
      */
     public function testDeserializeWrongNormalizer()
     {
-        $serializer = new Serializer(array(new CustomNormalizer()), array('json' => new JsonEncoder()));
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new CustomNormalizer()], ['json' => new JsonEncoder()]);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
     }
 
@@ -263,44 +263,44 @@ class SerializerTest extends TestCase
      */
     public function testDeserializeNoEncoder()
     {
-        $serializer = new Serializer(array(), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $serializer->deserialize(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json');
     }
 
     public function testDeserializeSupported()
     {
-        $serializer = new Serializer(array(new GetSetMethodNormalizer()), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new GetSetMethodNormalizer()], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $this->assertTrue($serializer->supportsDenormalization(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json'));
     }
 
     public function testDeserializeNotSupported()
     {
-        $serializer = new Serializer(array(new GetSetMethodNormalizer()), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([new GetSetMethodNormalizer()], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $this->assertFalse($serializer->supportsDenormalization(json_encode($data), 'stdClass', 'json'));
     }
 
     public function testDeserializeNotSupportedMissing()
     {
-        $serializer = new Serializer(array(), array());
-        $data = array('title' => 'foo', 'numbers' => array(5, 3));
+        $serializer = new Serializer([], []);
+        $data = ['title' => 'foo', 'numbers' => [5, 3]];
         $this->assertFalse($serializer->supportsDenormalization(json_encode($data), '\Symfony\Component\Serializer\Tests\Model', 'json'));
     }
 
     public function testEncode()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
-        $data = array('foo', array(5, 3));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
+        $data = ['foo', [5, 3]];
         $result = $serializer->encode($data, 'json');
         $this->assertEquals(json_encode($data), $result);
     }
 
     public function testDecode()
     {
-        $serializer = new Serializer(array(), array('json' => new JsonEncoder()));
-        $data = array('foo', array(5, 3));
+        $serializer = new Serializer([], ['json' => new JsonEncoder()]);
+        $data = ['foo', [5, 3]];
         $result = $serializer->decode(json_encode($data), 'json');
         $this->assertEquals($data, $result);
     }
@@ -308,20 +308,20 @@ class SerializerTest extends TestCase
     public function testSupportsArrayDeserialization()
     {
         $serializer = new Serializer(
-            array(
+            [
                 new GetSetMethodNormalizer(),
                 new PropertyNormalizer(),
                 new ObjectNormalizer(),
                 new CustomNormalizer(),
                 new ArrayDenormalizer(),
-            ),
-            array(
+            ],
+            [
                 'json' => new JsonEncoder(),
-            )
+            ]
         );
 
         $this->assertTrue(
-            $serializer->supportsDenormalization(array(), __NAMESPACE__.'\Model[]', 'json')
+            $serializer->supportsDenormalization([], __NAMESPACE__.'\Model[]', 'json')
         );
     }
 
@@ -329,19 +329,19 @@ class SerializerTest extends TestCase
     {
         $jsonData = '[{"title":"foo","numbers":[5,3]},{"title":"bar","numbers":[2,8]}]';
 
-        $expectedData = array(
-            Model::fromArray(array('title' => 'foo', 'numbers' => array(5, 3))),
-            Model::fromArray(array('title' => 'bar', 'numbers' => array(2, 8))),
-        );
+        $expectedData = [
+            Model::fromArray(['title' => 'foo', 'numbers' => [5, 3]]),
+            Model::fromArray(['title' => 'bar', 'numbers' => [2, 8]]),
+        ];
 
         $serializer = new Serializer(
-            array(
+            [
                 new GetSetMethodNormalizer(),
                 new ArrayDenormalizer(),
-            ),
-            array(
+            ],
+            [
                 'json' => new JsonEncoder(),
-            )
+            ]
         );
 
         $this->assertEquals(
@@ -352,29 +352,29 @@ class SerializerTest extends TestCase
 
     public function testNormalizerAware()
     {
-        $normalizerAware = $this->getMockBuilder(array(NormalizerAwareInterface::class, NormalizerInterface::class))->getMock();
+        $normalizerAware = $this->getMockBuilder([NormalizerAwareInterface::class, NormalizerInterface::class])->getMock();
         $normalizerAware->expects($this->once())
             ->method('setNormalizer')
             ->with($this->isInstanceOf(NormalizerInterface::class));
 
-        new Serializer(array($normalizerAware));
+        new Serializer([$normalizerAware]);
     }
 
     public function testDenormalizerAware()
     {
-        $denormalizerAware = $this->getMockBuilder(array(DenormalizerAwareInterface::class, DenormalizerInterface::class))->getMock();
+        $denormalizerAware = $this->getMockBuilder([DenormalizerAwareInterface::class, DenormalizerInterface::class])->getMock();
         $denormalizerAware->expects($this->once())
             ->method('setDenormalizer')
             ->with($this->isInstanceOf(DenormalizerInterface::class));
 
-        new Serializer(array($denormalizerAware));
+        new Serializer([$denormalizerAware]);
     }
 
     public function testDeserializeObjectConstructorWithObjectTypeHint()
     {
         $jsonData = '{"bar":{"value":"baz"}}';
 
-        $serializer = new Serializer(array(new ObjectNormalizer()), array('json' => new JsonEncoder()));
+        $serializer = new Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()]);
 
         $this->assertEquals(new Foo(new Bar('baz')), $serializer->deserialize($jsonData, Foo::class, 'json'));
     }
@@ -384,28 +384,28 @@ class SerializerTest extends TestCase
         $example = new AbstractDummyFirstChild('foo-value', 'bar-value');
 
         $loaderMock = $this->getMockBuilder(ClassMetadataFactoryInterface::class)->getMock();
-        $loaderMock->method('hasMetadataFor')->will($this->returnValueMap(array(
-            array(
+        $loaderMock->method('hasMetadataFor')->will($this->returnValueMap([
+            [
                 AbstractDummy::class,
                 true,
-            ),
-        )));
+            ],
+        ]));
 
-        $loaderMock->method('getMetadataFor')->will($this->returnValueMap(array(
-            array(
+        $loaderMock->method('getMetadataFor')->will($this->returnValueMap([
+            [
                 AbstractDummy::class,
                 new ClassMetadata(
                     AbstractDummy::class,
-                    new ClassDiscriminatorMapping('type', array(
+                    new ClassDiscriminatorMapping('type', [
                         'first' => AbstractDummyFirstChild::class,
                         'second' => AbstractDummySecondChild::class,
-                    ))
+                    ])
                 ),
-            ),
-        )));
+            ],
+        ]));
 
         $discriminatorResolver = new ClassDiscriminatorFromClassMetadata($loaderMock);
-        $serializer = new Serializer(array(new ObjectNormalizer(null, null, null, null, $discriminatorResolver)), array('json' => new JsonEncoder()));
+        $serializer = new Serializer([new ObjectNormalizer(null, null, null, null, $discriminatorResolver)], ['json' => new JsonEncoder()]);
 
         $jsonData = '{"type":"first","bar":"bar-value","foo":"foo-value"}';
 
@@ -437,15 +437,15 @@ class SerializerTest extends TestCase
         $example->two = 2;
 
         $serializer = $this->serializerWithClassDiscriminator();
-        $deserialized = $serializer->deserialize('{"type":"one","one":1,"two":2}', DummyMessageInterface::class, 'json', array(
-            'groups' => array('two'),
-        ));
+        $deserialized = $serializer->deserialize('{"type":"one","one":1,"two":2}', DummyMessageInterface::class, 'json', [
+            'groups' => ['two'],
+        ]);
 
         $this->assertEquals($example, $deserialized);
 
-        $serialized = $serializer->serialize($deserialized, 'json', array(
-            'groups' => array('two'),
-        ));
+        $serialized = $serializer->serialize($deserialized, 'json', [
+            'groups' => ['two'],
+        ]);
 
         $this->assertEquals('{"two":2,"type":"one"}', $serialized);
     }
@@ -488,7 +488,7 @@ class SerializerTest extends TestCase
     {
         $classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
 
-        return new Serializer(array(new ObjectNormalizer($classMetadataFactory, null, null, new ReflectionExtractor(), new ClassDiscriminatorFromClassMetadata($classMetadataFactory))), array('json' => new JsonEncoder()));
+        return new Serializer([new ObjectNormalizer($classMetadataFactory, null, null, new ReflectionExtractor(), new ClassDiscriminatorFromClassMetadata($classMetadataFactory))], ['json' => new JsonEncoder()]);
     }
 }
 
@@ -532,7 +532,7 @@ class Model
 
     public function toArray()
     {
-        return array('title' => $this->title, 'numbers' => $this->numbers);
+        return ['title' => $this->title, 'numbers' => $this->numbers];
     }
 }
 
diff --git a/src/Symfony/Component/Stopwatch/Section.php b/src/Symfony/Component/Stopwatch/Section.php
index aae2688324..8f9c3e960a 100644
--- a/src/Symfony/Component/Stopwatch/Section.php
+++ b/src/Symfony/Component/Stopwatch/Section.php
@@ -21,7 +21,7 @@ class Section
     /**
      * @var StopwatchEvent[]
      */
-    private $events = array();
+    private $events = [];
 
     /**
      * @var float|null
@@ -41,7 +41,7 @@ class Section
     /**
      * @var Section[]
      */
-    private $children = array();
+    private $children = [];
 
     /**
      * @param float|null $origin        Set the origin of the events in this section, use null to set their origin to their start time
diff --git a/src/Symfony/Component/Stopwatch/Stopwatch.php b/src/Symfony/Component/Stopwatch/Stopwatch.php
index 6c16d4b829..a9f8862f52 100644
--- a/src/Symfony/Component/Stopwatch/Stopwatch.php
+++ b/src/Symfony/Component/Stopwatch/Stopwatch.php
@@ -165,7 +165,7 @@ class Stopwatch implements ResetInterface
      */
     public function getSectionEvents($id)
     {
-        return isset($this->sections[$id]) ? $this->sections[$id]->getEvents() : array();
+        return isset($this->sections[$id]) ? $this->sections[$id]->getEvents() : [];
     }
 
     /**
@@ -173,6 +173,6 @@ class Stopwatch implements ResetInterface
      */
     public function reset()
     {
-        $this->sections = $this->activeSections = array('__root__' => new Section(null, $this->morePrecision));
+        $this->sections = $this->activeSections = ['__root__' => new Section(null, $this->morePrecision)];
     }
 }
diff --git a/src/Symfony/Component/Stopwatch/StopwatchEvent.php b/src/Symfony/Component/Stopwatch/StopwatchEvent.php
index 99ed6de282..808af20e25 100644
--- a/src/Symfony/Component/Stopwatch/StopwatchEvent.php
+++ b/src/Symfony/Component/Stopwatch/StopwatchEvent.php
@@ -21,7 +21,7 @@ class StopwatchEvent
     /**
      * @var StopwatchPeriod[]
      */
-    private $periods = array();
+    private $periods = [];
 
     /**
      * @var float
@@ -41,7 +41,7 @@ class StopwatchEvent
     /**
      * @var float[]
      */
-    private $started = array();
+    private $started = [];
 
     /**
      * @param float       $origin        The origin time in milliseconds
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
index ea991d8af8..5d94e48fe8 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchEventTest.php
@@ -43,7 +43,7 @@ class StopwatchEventTest extends TestCase
     public function testGetPeriods()
     {
         $event = new StopwatchEvent(microtime(true) * 1000);
-        $this->assertEquals(array(), $event->getPeriods());
+        $this->assertEquals([], $event->getPeriods());
 
         $event = new StopwatchEvent(microtime(true) * 1000);
         $event->start();
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchPeriodTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchPeriodTest.php
index f2387b8285..717ff9d56a 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchPeriodTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchPeriodTest.php
@@ -45,23 +45,23 @@ class StopwatchPeriodTest extends TestCase
 
     public function provideTimeValues()
     {
-        yield array(0, false, 0);
-        yield array(0, true, 0.0);
-        yield array(0.0, false, 0);
-        yield array(0.0, true, 0.0);
-        yield array(2.71, false, 2);
-        yield array(2.71, true, 2.71);
+        yield [0, false, 0];
+        yield [0, true, 0.0];
+        yield [0.0, false, 0];
+        yield [0.0, true, 0.0];
+        yield [2.71, false, 2];
+        yield [2.71, true, 2.71];
     }
 
     public function provideDurationValues()
     {
-        yield array(0, 0, false, 0);
-        yield array(0, 0, true, 0.0);
-        yield array(0.0, 0.0, false, 0);
-        yield array(0.0, 0.0, true, 0.0);
-        yield array(2, 3.14, false, 1);
-        yield array(2, 3.14, true, 1.14);
-        yield array(2.71, 3.14, false, 1);
-        yield array(2.71, 3.14, true, 0.43);
+        yield [0, 0, false, 0];
+        yield [0, 0, true, 0.0];
+        yield [0.0, 0.0, false, 0];
+        yield [0.0, 0.0, true, 0.0];
+        yield [2, 3.14, false, 1];
+        yield [2, 3.14, true, 1.14];
+        yield [2.71, 3.14, false, 1];
+        yield [2.71, 3.14, true, 0.43];
     }
 }
diff --git a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
index a5cb3dd92a..30f976ad04 100644
--- a/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
+++ b/src/Symfony/Component/Stopwatch/Tests/StopwatchTest.php
@@ -70,11 +70,11 @@ class StopwatchTest extends TestCase
         $events->setAccessible(true);
 
         $stopwatchMockEvent = $this->getMockBuilder('Symfony\Component\Stopwatch\StopwatchEvent')
-            ->setConstructorArgs(array(microtime(true) * 1000))
+            ->setConstructorArgs([microtime(true) * 1000])
             ->getMock()
         ;
 
-        $events->setValue(end($section), array('foo' => $stopwatchMockEvent));
+        $events->setValue(end($section), ['foo' => $stopwatchMockEvent]);
 
         $this->assertFalse($stopwatch->isStarted('foo'));
     }
diff --git a/src/Symfony/Component/Templating/DelegatingEngine.php b/src/Symfony/Component/Templating/DelegatingEngine.php
index b47a0f0620..90cdbfa235 100644
--- a/src/Symfony/Component/Templating/DelegatingEngine.php
+++ b/src/Symfony/Component/Templating/DelegatingEngine.php
@@ -21,12 +21,12 @@ class DelegatingEngine implements EngineInterface, StreamingEngineInterface
     /**
      * @var EngineInterface[]
      */
-    protected $engines = array();
+    protected $engines = [];
 
     /**
      * @param EngineInterface[] $engines An array of EngineInterface instances to add
      */
-    public function __construct(array $engines = array())
+    public function __construct(array $engines = [])
     {
         foreach ($engines as $engine) {
             $this->addEngine($engine);
@@ -36,7 +36,7 @@ class DelegatingEngine implements EngineInterface, StreamingEngineInterface
     /**
      * {@inheritdoc}
      */
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
         return $this->getEngine($name)->render($name, $parameters);
     }
@@ -44,7 +44,7 @@ class DelegatingEngine implements EngineInterface, StreamingEngineInterface
     /**
      * {@inheritdoc}
      */
-    public function stream($name, array $parameters = array())
+    public function stream($name, array $parameters = [])
     {
         $engine = $this->getEngine($name);
         if (!$engine instanceof StreamingEngineInterface) {
diff --git a/src/Symfony/Component/Templating/EngineInterface.php b/src/Symfony/Component/Templating/EngineInterface.php
index fb02c80daf..ab4ccc71c0 100644
--- a/src/Symfony/Component/Templating/EngineInterface.php
+++ b/src/Symfony/Component/Templating/EngineInterface.php
@@ -40,7 +40,7 @@ interface EngineInterface
      *
      * @throws \RuntimeException if the template cannot be rendered
      */
-    public function render($name, array $parameters = array());
+    public function render($name, array $parameters = []);
 
     /**
      * Returns true if the template exists.
diff --git a/src/Symfony/Component/Templating/Helper/SlotsHelper.php b/src/Symfony/Component/Templating/Helper/SlotsHelper.php
index e5faf7fe88..80acdc93b6 100644
--- a/src/Symfony/Component/Templating/Helper/SlotsHelper.php
+++ b/src/Symfony/Component/Templating/Helper/SlotsHelper.php
@@ -18,8 +18,8 @@ namespace Symfony\Component\Templating\Helper;
  */
 class SlotsHelper extends Helper
 {
-    protected $slots = array();
-    protected $openSlots = array();
+    protected $slots = [];
+    protected $openSlots = [];
 
     /**
      * Starts a new slot.
diff --git a/src/Symfony/Component/Templating/Loader/CacheLoader.php b/src/Symfony/Component/Templating/Loader/CacheLoader.php
index 215b7dcd9d..0e00ef06f7 100644
--- a/src/Symfony/Component/Templating/Loader/CacheLoader.php
+++ b/src/Symfony/Component/Templating/Loader/CacheLoader.php
@@ -53,7 +53,7 @@ class CacheLoader extends Loader
 
         if (is_file($path)) {
             if (null !== $this->logger) {
-                $this->logger->debug('Fetching template from cache.', array('name' => $template->get('name')));
+                $this->logger->debug('Fetching template from cache.', ['name' => $template->get('name')]);
             }
 
             return new FileStorage($path);
@@ -72,7 +72,7 @@ class CacheLoader extends Loader
         file_put_contents($path, $content);
 
         if (null !== $this->logger) {
-            $this->logger->debug('Storing template in cache.', array('name' => $template->get('name')));
+            $this->logger->debug('Storing template in cache.', ['name' => $template->get('name')]);
         }
 
         return new FileStorage($path);
diff --git a/src/Symfony/Component/Templating/Loader/ChainLoader.php b/src/Symfony/Component/Templating/Loader/ChainLoader.php
index d66139e0b3..3e5f375cb7 100644
--- a/src/Symfony/Component/Templating/Loader/ChainLoader.php
+++ b/src/Symfony/Component/Templating/Loader/ChainLoader.php
@@ -21,12 +21,12 @@ use Symfony\Component\Templating\TemplateReferenceInterface;
  */
 class ChainLoader extends Loader
 {
-    protected $loaders = array();
+    protected $loaders = [];
 
     /**
      * @param LoaderInterface[] $loaders An array of loader instances
      */
-    public function __construct(array $loaders = array())
+    public function __construct(array $loaders = [])
     {
         foreach ($loaders as $loader) {
             $this->addLoader($loader);
diff --git a/src/Symfony/Component/Templating/Loader/FilesystemLoader.php b/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
index 919c96fb20..016018cf1b 100644
--- a/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
+++ b/src/Symfony/Component/Templating/Loader/FilesystemLoader.php
@@ -45,16 +45,16 @@ class FilesystemLoader extends Loader
             return new FileStorage($file);
         }
 
-        $replacements = array();
+        $replacements = [];
         foreach ($template->all() as $key => $value) {
             $replacements['%'.$key.'%'] = $value;
         }
 
-        $fileFailures = array();
+        $fileFailures = [];
         foreach ($this->templatePathPatterns as $templatePathPattern) {
             if (is_file($file = strtr($templatePathPattern, $replacements)) && is_readable($file)) {
                 if (null !== $this->logger) {
-                    $this->logger->debug('Loaded template file.', array('file' => $file));
+                    $this->logger->debug('Loaded template file.', ['file' => $file]);
                 }
 
                 return new FileStorage($file);
@@ -68,7 +68,7 @@ class FilesystemLoader extends Loader
         // only log failures if no template could be loaded at all
         foreach ($fileFailures as $file) {
             if (null !== $this->logger) {
-                $this->logger->debug('Failed loading template file.', array('file' => $file));
+                $this->logger->debug('Failed loading template file.', ['file' => $file]);
             }
         }
 
diff --git a/src/Symfony/Component/Templating/PhpEngine.php b/src/Symfony/Component/Templating/PhpEngine.php
index 11452c709e..9da98266b9 100644
--- a/src/Symfony/Component/Templating/PhpEngine.php
+++ b/src/Symfony/Component/Templating/PhpEngine.php
@@ -29,14 +29,14 @@ class PhpEngine implements EngineInterface, \ArrayAccess
     /**
      * @var HelperInterface[]
      */
-    protected $helpers = array();
-    protected $parents = array();
-    protected $stack = array();
+    protected $helpers = [];
+    protected $parents = [];
+    protected $stack = [];
     protected $charset = 'UTF-8';
-    protected $cache = array();
-    protected $escapers = array();
-    protected static $escaperCache = array();
-    protected $globals = array();
+    protected $cache = [];
+    protected $escapers = [];
+    protected static $escaperCache = [];
+    protected $globals = [];
     protected $parser;
 
     private $evalTemplate;
@@ -47,7 +47,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
      * @param LoaderInterface             $loader  A loader instance
      * @param HelperInterface[]           $helpers An array of helper instances
      */
-    public function __construct(TemplateNameParserInterface $parser, LoaderInterface $loader, array $helpers = array())
+    public function __construct(TemplateNameParserInterface $parser, LoaderInterface $loader, array $helpers = [])
     {
         $this->parser = $parser;
         $this->loader = $loader;
@@ -65,7 +65,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
      *
      * @throws \InvalidArgumentException if the template does not exist
      */
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
         $storage = $this->load($name);
         $key = hash('sha256', serialize($storage));
@@ -127,7 +127,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
      *
      * @throws \InvalidArgumentException
      */
-    protected function evaluate(Storage $template, array $parameters = array())
+    protected function evaluate(Storage $template, array $parameters = [])
     {
         $this->evalTemplate = $template;
         $this->evalParameters = $parameters;
@@ -235,7 +235,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
      */
     public function setHelpers(array $helpers)
     {
-        $this->helpers = array();
+        $this->helpers = [];
         $this->addHelpers($helpers);
     }
 
@@ -358,7 +358,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
     public function setEscaper($context, callable $escaper)
     {
         $this->escapers[$context] = $escaper;
-        self::$escaperCache[$context] = array();
+        self::$escaperCache[$context] = [];
     }
 
     /**
@@ -419,7 +419,7 @@ class PhpEngine implements EngineInterface, \ArrayAccess
     {
         $flags = ENT_QUOTES | ENT_SUBSTITUTE;
 
-        $this->escapers = array(
+        $this->escapers = [
             'html' =>
                 /**
                  * Runs the PHP function htmlspecialchars on the value passed.
@@ -472,9 +472,9 @@ class PhpEngine implements EngineInterface, \ArrayAccess
 
                     return $value;
                 },
-        );
+        ];
 
-        self::$escaperCache = array();
+        self::$escaperCache = [];
     }
 
     /**
diff --git a/src/Symfony/Component/Templating/StreamingEngineInterface.php b/src/Symfony/Component/Templating/StreamingEngineInterface.php
index f8815f85f1..d389ccc52d 100644
--- a/src/Symfony/Component/Templating/StreamingEngineInterface.php
+++ b/src/Symfony/Component/Templating/StreamingEngineInterface.php
@@ -29,5 +29,5 @@ interface StreamingEngineInterface
      * @throws \RuntimeException if the template cannot be rendered
      * @throws \LogicException   if the template cannot be streamed
      */
-    public function stream($name, array $parameters = array());
+    public function stream($name, array $parameters = []);
 }
diff --git a/src/Symfony/Component/Templating/TemplateReference.php b/src/Symfony/Component/Templating/TemplateReference.php
index 311e817600..18c6bda2df 100644
--- a/src/Symfony/Component/Templating/TemplateReference.php
+++ b/src/Symfony/Component/Templating/TemplateReference.php
@@ -22,10 +22,10 @@ class TemplateReference implements TemplateReferenceInterface
 
     public function __construct(string $name = null, string $engine = null)
     {
-        $this->parameters = array(
+        $this->parameters = [
             'name' => $name,
             'engine' => $engine,
-        );
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php b/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
index cadd9edf0b..875672d27f 100644
--- a/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
+++ b/src/Symfony/Component/Templating/Tests/DelegatingEngineTest.php
@@ -25,11 +25,11 @@ class DelegatingEngineTest extends TestCase
 
         $secondEngine->expects($this->once())
             ->method('render')
-            ->with('template.php', array('foo' => 'bar'))
+            ->with('template.php', ['foo' => 'bar'])
             ->will($this->returnValue('<html />'));
 
-        $delegatingEngine = new DelegatingEngine(array($firstEngine, $secondEngine));
-        $result = $delegatingEngine->render('template.php', array('foo' => 'bar'));
+        $delegatingEngine = new DelegatingEngine([$firstEngine, $secondEngine]);
+        $result = $delegatingEngine->render('template.php', ['foo' => 'bar']);
 
         $this->assertSame('<html />', $result);
     }
@@ -43,8 +43,8 @@ class DelegatingEngineTest extends TestCase
         $firstEngine = $this->getEngineMock('template.php', false);
         $secondEngine = $this->getEngineMock('template.php', false);
 
-        $delegatingEngine = new DelegatingEngine(array($firstEngine, $secondEngine));
-        $delegatingEngine->render('template.php', array('foo' => 'bar'));
+        $delegatingEngine = new DelegatingEngine([$firstEngine, $secondEngine]);
+        $delegatingEngine->render('template.php', ['foo' => 'bar']);
     }
 
     public function testStreamDelegatesToSupportedEngine()
@@ -52,11 +52,11 @@ class DelegatingEngineTest extends TestCase
         $streamingEngine = $this->getStreamingEngineMock('template.php', true);
         $streamingEngine->expects($this->once())
             ->method('stream')
-            ->with('template.php', array('foo' => 'bar'))
+            ->with('template.php', ['foo' => 'bar'])
             ->will($this->returnValue('<html />'));
 
-        $delegatingEngine = new DelegatingEngine(array($streamingEngine));
-        $result = $delegatingEngine->stream('template.php', array('foo' => 'bar'));
+        $delegatingEngine = new DelegatingEngine([$streamingEngine]);
+        $result = $delegatingEngine->stream('template.php', ['foo' => 'bar']);
 
         $this->assertNull($result);
     }
@@ -67,8 +67,8 @@ class DelegatingEngineTest extends TestCase
      */
     public function testStreamRequiresStreamingEngine()
     {
-        $delegatingEngine = new DelegatingEngine(array(new TestEngine()));
-        $delegatingEngine->stream('template.php', array('foo' => 'bar'));
+        $delegatingEngine = new DelegatingEngine([new TestEngine()]);
+        $delegatingEngine->stream('template.php', ['foo' => 'bar']);
     }
 
     public function testExists()
@@ -79,7 +79,7 @@ class DelegatingEngineTest extends TestCase
             ->with('template.php')
             ->will($this->returnValue(true));
 
-        $delegatingEngine = new DelegatingEngine(array($engine));
+        $delegatingEngine = new DelegatingEngine([$engine]);
 
         $this->assertTrue($delegatingEngine->exists('template.php'));
     }
@@ -88,7 +88,7 @@ class DelegatingEngineTest extends TestCase
     {
         $engine = $this->getEngineMock('template.php', true);
 
-        $delegatingEngine = new DelegatingEngine(array($engine));
+        $delegatingEngine = new DelegatingEngine([$engine]);
 
         $this->assertTrue($delegatingEngine->supports('template.php'));
     }
@@ -97,7 +97,7 @@ class DelegatingEngineTest extends TestCase
     {
         $engine = $this->getEngineMock('template.php', false);
 
-        $delegatingEngine = new DelegatingEngine(array($engine));
+        $delegatingEngine = new DelegatingEngine([$engine]);
 
         $this->assertFalse($delegatingEngine->supports('template.php'));
     }
@@ -107,7 +107,7 @@ class DelegatingEngineTest extends TestCase
         $firstEngine = $this->getEngineMock('template.php', false);
         $secondEngine = $this->getEngineMock('template.php', true);
 
-        $delegatingEngine = new DelegatingEngine(array($firstEngine, $secondEngine));
+        $delegatingEngine = new DelegatingEngine([$firstEngine, $secondEngine]);
 
         $this->assertSame($secondEngine, $delegatingEngine->getEngine('template.php'));
     }
@@ -121,7 +121,7 @@ class DelegatingEngineTest extends TestCase
         $firstEngine = $this->getEngineMock('template.php', false);
         $secondEngine = $this->getEngineMock('template.php', false);
 
-        $delegatingEngine = new DelegatingEngine(array($firstEngine, $secondEngine));
+        $delegatingEngine = new DelegatingEngine([$firstEngine, $secondEngine]);
         $delegatingEngine->getEngine('template.php');
     }
 
@@ -156,7 +156,7 @@ interface MyStreamingEngine extends StreamingEngineInterface, EngineInterface
 
 class TestEngine implements EngineInterface
 {
-    public function render($name, array $parameters = array())
+    public function render($name, array $parameters = [])
     {
     }
 
diff --git a/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
index dbc89bc6d1..e66d62398a 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/CacheLoaderTest.php
@@ -39,7 +39,7 @@ class CacheLoaderTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Storing template in cache.', array('name' => 'index'));
+            ->with('Storing template in cache.', ['name' => 'index']);
         $loader->setLogger($logger);
         $loader->load(new TemplateReference('index'));
 
@@ -47,7 +47,7 @@ class CacheLoaderTest extends TestCase
         $logger
             ->expects($this->once())
             ->method('debug')
-            ->with('Fetching template from cache.', array('name' => 'index'));
+            ->with('Fetching template from cache.', ['name' => 'index']);
         $loader->setLogger($logger);
         $loader->load(new TemplateReference('index'));
     }
diff --git a/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
index 7e403995a0..c81698bd89 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/ChainLoaderTest.php
@@ -30,20 +30,20 @@ class ChainLoaderTest extends TestCase
 
     public function testConstructor()
     {
-        $loader = new ProjectTemplateLoader1(array($this->loader1, $this->loader2));
-        $this->assertEquals(array($this->loader1, $this->loader2), $loader->getLoaders(), '__construct() takes an array of template loaders as its second argument');
+        $loader = new ProjectTemplateLoader1([$this->loader1, $this->loader2]);
+        $this->assertEquals([$this->loader1, $this->loader2], $loader->getLoaders(), '__construct() takes an array of template loaders as its second argument');
     }
 
     public function testAddLoader()
     {
-        $loader = new ProjectTemplateLoader1(array($this->loader1));
+        $loader = new ProjectTemplateLoader1([$this->loader1]);
         $loader->addLoader($this->loader2);
-        $this->assertEquals(array($this->loader1, $this->loader2), $loader->getLoaders(), '->addLoader() adds a template loader at the end of the loaders');
+        $this->assertEquals([$this->loader1, $this->loader2], $loader->getLoaders(), '->addLoader() adds a template loader at the end of the loaders');
     }
 
     public function testLoad()
     {
-        $loader = new ProjectTemplateLoader1(array($this->loader1, $this->loader2));
+        $loader = new ProjectTemplateLoader1([$this->loader1, $this->loader2]);
         $this->assertFalse($loader->load(new TemplateReference('bar', 'php')), '->load() returns false if the template is not found');
         $this->assertFalse($loader->load(new TemplateReference('foo', 'php')), '->load() returns false if the template does not exist for the given renderer');
         $this->assertInstanceOf(
diff --git a/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php b/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
index 04b93fb1c5..c6dcdefc95 100644
--- a/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
+++ b/src/Symfony/Component/Templating/Tests/Loader/FilesystemLoaderTest.php
@@ -29,9 +29,9 @@ class FilesystemLoaderTest extends TestCase
         $pathPattern = self::$fixturesPath.'/templates/%name%.%engine%';
         $path = self::$fixturesPath.'/templates';
         $loader = new ProjectTemplateLoader2($pathPattern);
-        $this->assertEquals(array($pathPattern), $loader->getTemplatePathPatterns(), '__construct() takes a path as its second argument');
-        $loader = new ProjectTemplateLoader2(array($pathPattern));
-        $this->assertEquals(array($pathPattern), $loader->getTemplatePathPatterns(), '__construct() takes an array of paths as its second argument');
+        $this->assertEquals([$pathPattern], $loader->getTemplatePathPatterns(), '__construct() takes a path as its second argument');
+        $loader = new ProjectTemplateLoader2([$pathPattern]);
+        $this->assertEquals([$pathPattern], $loader->getTemplatePathPatterns(), '__construct() takes an array of paths as its second argument');
     }
 
     public function testIsAbsolutePath()
@@ -66,7 +66,7 @@ class FilesystemLoaderTest extends TestCase
         $loader->setLogger($logger);
         $this->assertFalse($loader->load(new TemplateReference('foo.xml', 'php')), '->load() returns false if the template does not exist for the given engine');
 
-        $loader = new ProjectTemplateLoader2(array(self::$fixturesPath.'/null/%name%', $pathPattern));
+        $loader = new ProjectTemplateLoader2([self::$fixturesPath.'/null/%name%', $pathPattern]);
         $loader->setLogger($logger);
         $loader->load(new TemplateReference('foo.php', 'php'));
     }
diff --git a/src/Symfony/Component/Templating/Tests/PhpEngineTest.php b/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
index 0102f85af5..5b62100035 100644
--- a/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
+++ b/src/Symfony/Component/Templating/Tests/PhpEngineTest.php
@@ -93,7 +93,7 @@ class PhpEngineTest extends TestCase
 
     public function testExtendRender()
     {
-        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, array(), array(new SlotsHelper()));
+        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, [], [new SlotsHelper()]);
         try {
             $engine->render('name');
             $this->fail('->render() throws an InvalidArgumentException if the template does not exist');
@@ -102,25 +102,25 @@ class PhpEngineTest extends TestCase
             $this->assertEquals('The template "name" does not exist.', $e->getMessage(), '->render() throws an InvalidArgumentException if the template does not exist');
         }
 
-        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, array(new SlotsHelper()));
+        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, [new SlotsHelper()]);
         $engine->set(new \Symfony\Component\Templating\Tests\Fixtures\SimpleHelper('bar'));
         $this->loader->setTemplate('foo.php', '<?php $this->extend("layout.php"); echo $this[\'foo\'].$foo ?>');
         $this->loader->setTemplate('layout.php', '-<?php echo $this[\'slots\']->get("_content") ?>-');
-        $this->assertEquals('-barfoo-', $engine->render('foo.php', array('foo' => 'foo')), '->render() uses the decorator to decorate the template');
+        $this->assertEquals('-barfoo-', $engine->render('foo.php', ['foo' => 'foo']), '->render() uses the decorator to decorate the template');
 
-        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, array(new SlotsHelper()));
+        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, [new SlotsHelper()]);
         $engine->set(new \Symfony\Component\Templating\Tests\Fixtures\SimpleHelper('bar'));
         $this->loader->setTemplate('bar.php', 'bar');
         $this->loader->setTemplate('foo.php', '<?php $this->extend("layout.php"); echo $foo ?>');
         $this->loader->setTemplate('layout.php', '<?php echo $this->render("bar.php") ?>-<?php echo $this[\'slots\']->get("_content") ?>-');
-        $this->assertEquals('bar-foo-', $engine->render('foo.php', array('foo' => 'foo', 'bar' => 'bar')), '->render() supports render() calls in templates');
+        $this->assertEquals('bar-foo-', $engine->render('foo.php', ['foo' => 'foo', 'bar' => 'bar']), '->render() supports render() calls in templates');
     }
 
     public function testRenderParameter()
     {
         $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader);
         $this->loader->setTemplate('foo.php', '<?php echo $template . $parameters ?>');
-        $this->assertEquals('foobar', $engine->render('foo.php', array('template' => 'foo', 'parameters' => 'bar')), '->render() extract variables');
+        $this->assertEquals('foobar', $engine->render('foo.php', ['template' => 'foo', 'parameters' => 'bar']), '->render() extract variables');
     }
 
     /**
@@ -131,15 +131,15 @@ class PhpEngineTest extends TestCase
     {
         $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader);
         $this->loader->setTemplate('foo.php', 'bar');
-        $engine->render('foo.php', array($name => 'foo'));
+        $engine->render('foo.php', [$name => 'foo']);
     }
 
     public function forbiddenParameterNames()
     {
-        return array(
-            array('this'),
-            array('view'),
-        );
+        return [
+            ['this'],
+            ['view'],
+        ];
     }
 
     public function testEscape()
@@ -153,7 +153,7 @@ class PhpEngineTest extends TestCase
     public function testGetSetCharset()
     {
         $helper = new SlotsHelper();
-        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, array($helper));
+        $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader, [$helper]);
         $this->assertEquals('UTF-8', $engine->getCharset(), 'EngineInterface::getCharset() returns UTF-8 by default');
         $this->assertEquals('UTF-8', $helper->getCharset(), 'HelperInterface::getCharset() returns UTF-8 by default');
 
@@ -167,9 +167,9 @@ class PhpEngineTest extends TestCase
         $engine = new ProjectTemplateEngine(new TemplateNameParser(), $this->loader);
         $engine->addGlobal('global_variable', 'lorem ipsum');
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'global_variable' => 'lorem ipsum',
-        ), $engine->getGlobals());
+        ], $engine->getGlobals());
     }
 
     public function testGlobalsGetPassedToTemplate()
@@ -181,7 +181,7 @@ class PhpEngineTest extends TestCase
 
         $this->assertEquals($engine->render('global.php'), 'global variable');
 
-        $this->assertEquals($engine->render('global.php', array('global' => 'overwritten')), 'overwritten');
+        $this->assertEquals($engine->render('global.php', ['global' => 'overwritten']), 'overwritten');
     }
 
     public function testGetLoader()
@@ -202,7 +202,7 @@ class ProjectTemplateEngine extends PhpEngine
 
 class ProjectTemplateLoader extends Loader
 {
-    public $templates = array();
+    public $templates = [];
 
     public function setTemplate($name, $content)
     {
diff --git a/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php b/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
index 14a019402f..c67dc376c2 100644
--- a/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
+++ b/src/Symfony/Component/Templating/Tests/TemplateNameParserTest.php
@@ -42,10 +42,10 @@ class TemplateNameParserTest extends TestCase
 
     public function getLogicalNameToTemplateProvider()
     {
-        return array(
-            array('/path/to/section/name.engine', new TemplateReference('/path/to/section/name.engine', 'engine')),
-            array('name.engine', new TemplateReference('name.engine', 'engine')),
-            array('name', new TemplateReference('name')),
-        );
+        return [
+            ['/path/to/section/name.engine', new TemplateReference('/path/to/section/name.engine', 'engine')],
+            ['name.engine', new TemplateReference('name.engine', 'engine')],
+            ['name', new TemplateReference('name')],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php b/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
index a0765ddd66..919bab8fff 100644
--- a/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
+++ b/src/Symfony/Component/Translation/Catalogue/AbstractOperation.php
@@ -40,19 +40,19 @@ abstract class AbstractOperation implements OperationInterface
      *
      * The data structure of this array is as follows:
      *
-     *     array(
-     *         'domain 1' => array(
-     *             'all' => array(...),
-     *             'new' => array(...),
-     *             'obsolete' => array(...)
-     *         ),
-     *         'domain 2' => array(
-     *             'all' => array(...),
-     *             'new' => array(...),
-     *             'obsolete' => array(...)
-     *         ),
+     *     [
+     *         'domain 1' => [
+     *             'all' => [...],
+     *             'new' => [...],
+     *             'obsolete' => [...]
+     *         ],
+     *         'domain 2' => [
+     *             'all' => [...],
+     *             'new' => [...],
+     *             'obsolete' => [...]
+     *         ],
      *         ...
-     *     )
+     *     ]
      *
      * @var array The array that stores 'all', 'new' and 'obsolete' messages
      */
@@ -70,7 +70,7 @@ abstract class AbstractOperation implements OperationInterface
         $this->source = $source;
         $this->target = $target;
         $this->result = new MessageCatalogue($source->getLocale());
-        $this->messages = array();
+        $this->messages = [];
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Catalogue/MergeOperation.php b/src/Symfony/Component/Translation/Catalogue/MergeOperation.php
index 8dd4026176..d2f4abd13f 100644
--- a/src/Symfony/Component/Translation/Catalogue/MergeOperation.php
+++ b/src/Symfony/Component/Translation/Catalogue/MergeOperation.php
@@ -29,16 +29,16 @@ class MergeOperation extends AbstractOperation
      */
     protected function processDomain($domain)
     {
-        $this->messages[$domain] = array(
-            'all' => array(),
-            'new' => array(),
-            'obsolete' => array(),
-        );
+        $this->messages[$domain] = [
+            'all' => [],
+            'new' => [],
+            'obsolete' => [],
+        ];
         $intlDomain = $domain.MessageCatalogueInterface::INTL_DOMAIN_SUFFIX;
 
         foreach ($this->source->all($domain) as $id => $message) {
             $this->messages[$domain]['all'][$id] = $message;
-            $this->result->add(array($id => $message), $this->source->defines($id, $intlDomain) ? $intlDomain : $domain);
+            $this->result->add([$id => $message], $this->source->defines($id, $intlDomain) ? $intlDomain : $domain);
             if (null !== $keyMetadata = $this->source->getMetadata($id, $domain)) {
                 $this->result->setMetadata($id, $keyMetadata, $domain);
             }
@@ -48,7 +48,7 @@ class MergeOperation extends AbstractOperation
             if (!$this->source->has($id, $domain)) {
                 $this->messages[$domain]['all'][$id] = $message;
                 $this->messages[$domain]['new'][$id] = $message;
-                $this->result->add(array($id => $message), $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
+                $this->result->add([$id => $message], $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
                 if (null !== $keyMetadata = $this->target->getMetadata($id, $domain)) {
                     $this->result->setMetadata($id, $keyMetadata, $domain);
                 }
diff --git a/src/Symfony/Component/Translation/Catalogue/TargetOperation.php b/src/Symfony/Component/Translation/Catalogue/TargetOperation.php
index 523022550a..22aa9a3911 100644
--- a/src/Symfony/Component/Translation/Catalogue/TargetOperation.php
+++ b/src/Symfony/Component/Translation/Catalogue/TargetOperation.php
@@ -30,11 +30,11 @@ class TargetOperation extends AbstractOperation
      */
     protected function processDomain($domain)
     {
-        $this->messages[$domain] = array(
-            'all' => array(),
-            'new' => array(),
-            'obsolete' => array(),
-        );
+        $this->messages[$domain] = [
+            'all' => [],
+            'new' => [],
+            'obsolete' => [],
+        ];
         $intlDomain = $domain.MessageCatalogueInterface::INTL_DOMAIN_SUFFIX;
 
         // For 'all' messages, the code can't be simplified as ``$this->messages[$domain]['all'] = $target->all($domain);``,
@@ -49,7 +49,7 @@ class TargetOperation extends AbstractOperation
         foreach ($this->source->all($domain) as $id => $message) {
             if ($this->target->has($id, $domain)) {
                 $this->messages[$domain]['all'][$id] = $message;
-                $this->result->add(array($id => $message), $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
+                $this->result->add([$id => $message], $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
                 if (null !== $keyMetadata = $this->source->getMetadata($id, $domain)) {
                     $this->result->setMetadata($id, $keyMetadata, $domain);
                 }
@@ -62,7 +62,7 @@ class TargetOperation extends AbstractOperation
             if (!$this->source->has($id, $domain)) {
                 $this->messages[$domain]['all'][$id] = $message;
                 $this->messages[$domain]['new'][$id] = $message;
-                $this->result->add(array($id => $message), $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
+                $this->result->add([$id => $message], $this->target->defines($id, $intlDomain) ? $intlDomain : $domain);
                 if (null !== $keyMetadata = $this->target->getMetadata($id, $domain)) {
                     $this->result->setMetadata($id, $keyMetadata, $domain);
                 }
diff --git a/src/Symfony/Component/Translation/Command/XliffLintCommand.php b/src/Symfony/Component/Translation/Command/XliffLintCommand.php
index 17e1a72bb4..f8791a490e 100644
--- a/src/Symfony/Component/Translation/Command/XliffLintCommand.php
+++ b/src/Symfony/Component/Translation/Command/XliffLintCommand.php
@@ -89,10 +89,10 @@ EOF
                 throw new RuntimeException('Please provide a filename or pipe file content to STDIN.');
             }
 
-            return $this->display($io, array($this->validate($stdin)));
+            return $this->display($io, [$this->validate($stdin)]);
         }
 
-        $filesInfo = array();
+        $filesInfo = [];
         foreach ($filenames as $filename) {
             if (!$this->isReadable($filename)) {
                 throw new RuntimeException(sprintf('File or directory "%s" is not readable.', $filename));
@@ -108,11 +108,11 @@ EOF
 
     private function validate($content, $file = null)
     {
-        $errors = array();
+        $errors = [];
 
         // Avoid: Warning DOMDocument::loadXML(): Empty string supplied as input
         if ('' === trim($content)) {
-            return array('file' => $file, 'valid' => true);
+            return ['file' => $file, 'valid' => true];
         }
 
         libxml_use_internal_errors(true);
@@ -127,23 +127,23 @@ EOF
             $expectedFilenamePattern = $this->requireStrictFileNames ? sprintf('/^.*\.%s\.xlf/', $normalizedLocale) : sprintf('/^(.*\.%s\.xlf|%s\..*\.xlf)/', $normalizedLocale, $normalizedLocale);
 
             if (0 === preg_match($expectedFilenamePattern, basename($file))) {
-                $errors[] = array(
+                $errors[] = [
                     'line' => -1,
                     'column' => -1,
                     'message' => sprintf('There is a mismatch between the language included in the file name ("%s") and the "%s" value used in the "target-language" attribute of the file.', basename($file), $targetLanguage),
-                );
+                ];
             }
         }
 
         foreach (XliffUtils::validateSchema($document) as $xmlError) {
-            $errors[] = array(
+            $errors[] = [
                 'line' => $xmlError['line'],
                 'column' => $xmlError['column'],
                 'message' => $xmlError['message'],
-            );
+            ];
         }
 
-        return array('file' => $file, 'valid' => 0 === \count($errors), 'messages' => $errors);
+        return ['file' => $file, 'valid' => 0 === \count($errors), 'messages' => $errors];
     }
 
     private function display(SymfonyStyle $io, array $files)
@@ -210,7 +210,7 @@ EOF
         }
 
         foreach ($this->getDirectoryIterator($fileOrDirectory) as $file) {
-            if (!\in_array($file->getExtension(), array('xlf', 'xliff'))) {
+            if (!\in_array($file->getExtension(), ['xlf', 'xliff'])) {
                 continue;
             }
 
@@ -263,7 +263,7 @@ EOF
 
     private function getTargetLanguageFromFile(\DOMDocument $xliffContents): ?string
     {
-        foreach ($xliffContents->getElementsByTagName('file')[0]->attributes ?? array() as $attribute) {
+        foreach ($xliffContents->getElementsByTagName('file')[0]->attributes ?? [] as $attribute) {
             if ('target-language' === $attribute->nodeName) {
                 return $attribute->nodeValue;
             }
diff --git a/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php b/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
index b281519140..d99b493ac6 100755
--- a/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
+++ b/src/Symfony/Component/Translation/DataCollector/TranslationDataCollector.php
@@ -57,7 +57,7 @@ class TranslationDataCollector extends DataCollector implements LateDataCollecto
      */
     public function reset()
     {
-        $this->data = array();
+        $this->data = [];
     }
 
     /**
@@ -65,7 +65,7 @@ class TranslationDataCollector extends DataCollector implements LateDataCollecto
      */
     public function getMessages()
     {
-        return isset($this->data['messages']) ? $this->data['messages'] : array();
+        return isset($this->data['messages']) ? $this->data['messages'] : [];
     }
 
     /**
@@ -102,7 +102,7 @@ class TranslationDataCollector extends DataCollector implements LateDataCollecto
      */
     public function getFallbackLocales()
     {
-        return (isset($this->data['fallback_locales']) && \count($this->data['fallback_locales']) > 0) ? $this->data['fallback_locales'] : array();
+        return (isset($this->data['fallback_locales']) && \count($this->data['fallback_locales']) > 0) ? $this->data['fallback_locales'] : [];
     }
 
     /**
@@ -115,13 +115,13 @@ class TranslationDataCollector extends DataCollector implements LateDataCollecto
 
     private function sanitizeCollectedMessages($messages)
     {
-        $result = array();
+        $result = [];
         foreach ($messages as $key => $message) {
             $messageId = $message['locale'].$message['domain'].$message['id'];
 
             if (!isset($result[$messageId])) {
                 $message['count'] = 1;
-                $message['parameters'] = !empty($message['parameters']) ? array($message['parameters']) : array();
+                $message['parameters'] = !empty($message['parameters']) ? [$message['parameters']] : [];
                 $messages[$key]['translation'] = $this->sanitizeString($message['translation']);
                 $result[$messageId] = $message;
             } else {
@@ -140,11 +140,11 @@ class TranslationDataCollector extends DataCollector implements LateDataCollecto
 
     private function computeCount($messages)
     {
-        $count = array(
+        $count = [
             DataCollectorTranslator::MESSAGE_DEFINED => 0,
             DataCollectorTranslator::MESSAGE_MISSING => 0,
             DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK => 0,
-        );
+        ];
 
         foreach ($messages as $message) {
             ++$count[$message['state']];
diff --git a/src/Symfony/Component/Translation/DataCollectorTranslator.php b/src/Symfony/Component/Translation/DataCollectorTranslator.php
index ca6bedc71b..39561ec92e 100644
--- a/src/Symfony/Component/Translation/DataCollectorTranslator.php
+++ b/src/Symfony/Component/Translation/DataCollectorTranslator.php
@@ -30,7 +30,7 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
      */
     private $translator;
 
-    private $messages = array();
+    private $messages = [];
 
     /**
      * @param TranslatorInterface $translator The translator must implement TranslatorBagInterface
@@ -50,7 +50,7 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
     /**
      * {@inheritdoc}
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         $trans = $this->translator->trans($id, $parameters, $domain, $locale);
         $this->collectMessage($locale, $domain, $id, $trans, $parameters);
@@ -63,15 +63,15 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
      *
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
     {
         if ($this->translator instanceof TranslatorInterface) {
-            $trans = $this->translator->trans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+            $trans = $this->translator->trans($id, ['%count%' => $number] + $parameters, $domain, $locale);
         }
 
         $trans = $this->translator->transChoice($id, $number, $parameters, $domain, $locale);
 
-        $this->collectMessage($locale, $domain, $id, $trans, array('%count%' => $number) + $parameters);
+        $this->collectMessage($locale, $domain, $id, $trans, ['%count%' => $number] + $parameters);
 
         return $trans;
     }
@@ -111,7 +111,7 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
             return $this->translator->getFallbackLocales();
         }
 
-        return array();
+        return [];
     }
 
     /**
@@ -137,7 +137,7 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
      * @param string      $translation
      * @param array|null  $parameters
      */
-    private function collectMessage($locale, $domain, $id, $translation, $parameters = array())
+    private function collectMessage($locale, $domain, $id, $translation, $parameters = [])
     {
         if (null === $domain) {
             $domain = 'messages';
@@ -164,7 +164,7 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
             $state = self::MESSAGE_MISSING;
         }
 
-        $this->messages[] = array(
+        $this->messages[] = [
             'locale' => $locale,
             'domain' => $domain,
             'id' => $id,
@@ -172,6 +172,6 @@ class DataCollectorTranslator implements LegacyTranslatorInterface, TranslatorIn
             'parameters' => $parameters,
             'state' => $state,
             'transChoiceNumber' => isset($parameters['%count%']) && is_numeric($parameters['%count%']) ? $parameters['%count%'] : null,
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/DependencyInjection/TranslationDumperPass.php b/src/Symfony/Component/Translation/DependencyInjection/TranslationDumperPass.php
index 31d791dc26..930f36d721 100644
--- a/src/Symfony/Component/Translation/DependencyInjection/TranslationDumperPass.php
+++ b/src/Symfony/Component/Translation/DependencyInjection/TranslationDumperPass.php
@@ -38,7 +38,7 @@ class TranslationDumperPass implements CompilerPassInterface
         $definition = $container->getDefinition($this->writerServiceId);
 
         foreach ($container->findTaggedServiceIds($this->dumperTag, true) as $id => $attributes) {
-            $definition->addMethodCall('addDumper', array($attributes[0]['alias'], new Reference($id)));
+            $definition->addMethodCall('addDumper', [$attributes[0]['alias'], new Reference($id)]);
         }
     }
 }
diff --git a/src/Symfony/Component/Translation/DependencyInjection/TranslationExtractorPass.php b/src/Symfony/Component/Translation/DependencyInjection/TranslationExtractorPass.php
index b7e6f73458..d08b2ba5ff 100644
--- a/src/Symfony/Component/Translation/DependencyInjection/TranslationExtractorPass.php
+++ b/src/Symfony/Component/Translation/DependencyInjection/TranslationExtractorPass.php
@@ -43,7 +43,7 @@ class TranslationExtractorPass implements CompilerPassInterface
                 throw new RuntimeException(sprintf('The alias for the tag "translation.extractor" of service "%s" must be set.', $id));
             }
 
-            $definition->addMethodCall('addExtractor', array($attributes[0]['alias'], new Reference($id)));
+            $definition->addMethodCall('addExtractor', [$attributes[0]['alias'], new Reference($id)]);
         }
     }
 }
diff --git a/src/Symfony/Component/Translation/DependencyInjection/TranslatorPass.php b/src/Symfony/Component/Translation/DependencyInjection/TranslatorPass.php
index cbaa43db96..fc1c08fc32 100644
--- a/src/Symfony/Component/Translation/DependencyInjection/TranslatorPass.php
+++ b/src/Symfony/Component/Translation/DependencyInjection/TranslatorPass.php
@@ -39,8 +39,8 @@ class TranslatorPass implements CompilerPassInterface
             return;
         }
 
-        $loaders = array();
-        $loaderRefs = array();
+        $loaders = [];
+        $loaderRefs = [];
         foreach ($container->findTaggedServiceIds($this->loaderTag, true) as $id => $attributes) {
             $loaderRefs[$id] = new Reference($id);
             $loaders[$id][] = $attributes[0]['alias'];
@@ -53,7 +53,7 @@ class TranslatorPass implements CompilerPassInterface
             $definition = $container->getDefinition($this->readerServiceId);
             foreach ($loaders as $id => $formats) {
                 foreach ($formats as $format) {
-                    $definition->addMethodCall('addLoader', array($format, $loaderRefs[$id]));
+                    $definition->addMethodCall('addLoader', [$format, $loaderRefs[$id]]);
                 }
             }
         }
diff --git a/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php b/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
index 0880528dc9..bfa8db61ad 100644
--- a/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/CsvFileDumper.php
@@ -26,12 +26,12 @@ class CsvFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $handle = fopen('php://memory', 'r+b');
 
         foreach ($messages->all($domain) as $source => $target) {
-            fputcsv($handle, array($source, $target), $this->delimiter, $this->enclosure);
+            fputcsv($handle, [$source, $target], $this->delimiter, $this->enclosure);
         }
 
         rewind($handle);
diff --git a/src/Symfony/Component/Translation/Dumper/DumperInterface.php b/src/Symfony/Component/Translation/Dumper/DumperInterface.php
index cebc65ed89..9965e8091f 100644
--- a/src/Symfony/Component/Translation/Dumper/DumperInterface.php
+++ b/src/Symfony/Component/Translation/Dumper/DumperInterface.php
@@ -27,5 +27,5 @@ interface DumperInterface
      * @param MessageCatalogue $messages The message catalogue
      * @param array            $options  Options that are used by the dumper
      */
-    public function dump(MessageCatalogue $messages, $options = array());
+    public function dump(MessageCatalogue $messages, $options = []);
 }
diff --git a/src/Symfony/Component/Translation/Dumper/FileDumper.php b/src/Symfony/Component/Translation/Dumper/FileDumper.php
index 8afcf60898..57ce9d2141 100644
--- a/src/Symfony/Component/Translation/Dumper/FileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/FileDumper.php
@@ -61,7 +61,7 @@ abstract class FileDumper implements DumperInterface
     /**
      * {@inheritdoc}
      */
-    public function dump(MessageCatalogue $messages, $options = array())
+    public function dump(MessageCatalogue $messages, $options = [])
     {
         if (!array_key_exists('path', $options)) {
             throw new InvalidArgumentException('The file dumper needs a path option.');
@@ -84,7 +84,7 @@ abstract class FileDumper implements DumperInterface
                 $intlPath = $options['path'].'/'.$this->getRelativePath($intlDomain, $messages->getLocale());
                 file_put_contents($intlPath, $this->formatCatalogue($messages, $intlDomain, $options));
 
-                $messages->replace(array(), $intlDomain);
+                $messages->replace([], $intlDomain);
 
                 try {
                     if ($messages->all($domain)) {
@@ -109,7 +109,7 @@ abstract class FileDumper implements DumperInterface
      *
      * @return string representation
      */
-    abstract public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array());
+    abstract public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = []);
 
     /**
      * Gets the file extension of the dumper.
@@ -123,10 +123,10 @@ abstract class FileDumper implements DumperInterface
      */
     private function getRelativePath(string $domain, string $locale): string
     {
-        return strtr($this->relativePathTemplate, array(
+        return strtr($this->relativePathTemplate, [
             '%domain%' => $domain,
             '%locale%' => $locale,
             '%extension%' => $this->getExtension(),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php b/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
index efa9d7fee6..48d0befdf9 100644
--- a/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/IcuResFileDumper.php
@@ -28,7 +28,7 @@ class IcuResFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $data = $indexes = $resources = '';
 
diff --git a/src/Symfony/Component/Translation/Dumper/IniFileDumper.php b/src/Symfony/Component/Translation/Dumper/IniFileDumper.php
index 9ed3754037..45ff9614b1 100644
--- a/src/Symfony/Component/Translation/Dumper/IniFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/IniFileDumper.php
@@ -23,7 +23,7 @@ class IniFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $output = '';
 
diff --git a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
index a4db4d6ab8..2af8231bd6 100644
--- a/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/JsonFileDumper.php
@@ -23,7 +23,7 @@ class JsonFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $flags = $options['json_encoding'] ?? JSON_PRETTY_PRINT;
 
diff --git a/src/Symfony/Component/Translation/Dumper/MoFileDumper.php b/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
index 32ed0ac268..27be16d573 100644
--- a/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/MoFileDumper.php
@@ -24,20 +24,20 @@ class MoFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $sources = $targets = $sourceOffsets = $targetOffsets = '';
-        $offsets = array();
+        $offsets = [];
         $size = 0;
 
         foreach ($messages->all($domain) as $source => $target) {
-            $offsets[] = array_map('strlen', array($sources, $source, $targets, $target));
+            $offsets[] = array_map('strlen', [$sources, $source, $targets, $target]);
             $sources .= "\0".$source;
             $targets .= "\0".$target;
             ++$size;
         }
 
-        $header = array(
+        $header = [
             'magicNumber' => MoFileLoader::MO_LITTLE_ENDIAN_MAGIC,
             'formatRevision' => 0,
             'count' => $size,
@@ -45,7 +45,7 @@ class MoFileDumper extends FileDumper
             'offsetTranslated' => MoFileLoader::MO_HEADER_SIZE + (8 * $size),
             'sizeHashes' => 0,
             'offsetHashes' => MoFileLoader::MO_HEADER_SIZE + (16 * $size),
-        );
+        ];
 
         $sourcesSize = \strlen($sources);
         $sourcesStart = $header['offsetHashes'] + 1;
@@ -57,7 +57,7 @@ class MoFileDumper extends FileDumper
                           .$this->writeLong($offset[2] + $sourcesStart + $sourcesSize);
         }
 
-        $output = implode('', array_map(array($this, 'writeLong'), $header))
+        $output = implode('', array_map([$this, 'writeLong'], $header))
                .$sourceOffsets
                .$targetOffsets
                .$sources
diff --git a/src/Symfony/Component/Translation/Dumper/PhpFileDumper.php b/src/Symfony/Component/Translation/Dumper/PhpFileDumper.php
index c7c37aac92..e77afc2fbf 100644
--- a/src/Symfony/Component/Translation/Dumper/PhpFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/PhpFileDumper.php
@@ -23,7 +23,7 @@ class PhpFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         return "<?php\n\nreturn ".var_export($messages->all($domain), true).";\n";
     }
diff --git a/src/Symfony/Component/Translation/Dumper/PoFileDumper.php b/src/Symfony/Component/Translation/Dumper/PoFileDumper.php
index ed4418b148..e9673b6d29 100644
--- a/src/Symfony/Component/Translation/Dumper/PoFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/PoFileDumper.php
@@ -23,7 +23,7 @@ class PoFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $output = 'msgid ""'."\n";
         $output .= 'msgstr ""'."\n";
diff --git a/src/Symfony/Component/Translation/Dumper/QtFileDumper.php b/src/Symfony/Component/Translation/Dumper/QtFileDumper.php
index a9073f26df..ec93f92e4a 100644
--- a/src/Symfony/Component/Translation/Dumper/QtFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/QtFileDumper.php
@@ -23,7 +23,7 @@ class QtFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $dom = new \DOMDocument('1.0', 'utf-8');
         $dom->formatOutput = true;
diff --git a/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php b/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
index c12454cd84..8ee8d5a009 100644
--- a/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/XliffFileDumper.php
@@ -24,7 +24,7 @@ class XliffFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         $xliffVersion = '1.2';
         if (array_key_exists('xliff_version', $options)) {
@@ -55,9 +55,9 @@ class XliffFileDumper extends FileDumper
         return 'xlf';
     }
 
-    private function dumpXliff1($defaultLocale, MessageCatalogue $messages, $domain, array $options = array())
+    private function dumpXliff1($defaultLocale, MessageCatalogue $messages, $domain, array $options = [])
     {
-        $toolInfo = array('tool-id' => 'symfony', 'tool-name' => 'Symfony');
+        $toolInfo = ['tool-id' => 'symfony', 'tool-name' => 'Symfony'];
         if (array_key_exists('tool_info', $options)) {
             $toolInfo = array_merge($toolInfo, $options['tool_info']);
         }
@@ -129,7 +129,7 @@ class XliffFileDumper extends FileDumper
         return $dom->saveXML();
     }
 
-    private function dumpXliff2($defaultLocale, MessageCatalogue $messages, $domain, array $options = array())
+    private function dumpXliff2($defaultLocale, MessageCatalogue $messages, $domain, array $options = [])
     {
         $dom = new \DOMDocument('1.0', 'utf-8');
         $dom->formatOutput = true;
diff --git a/src/Symfony/Component/Translation/Dumper/YamlFileDumper.php b/src/Symfony/Component/Translation/Dumper/YamlFileDumper.php
index b19b9ae1fd..d6e4af8fb6 100644
--- a/src/Symfony/Component/Translation/Dumper/YamlFileDumper.php
+++ b/src/Symfony/Component/Translation/Dumper/YamlFileDumper.php
@@ -33,7 +33,7 @@ class YamlFileDumper extends FileDumper
     /**
      * {@inheritdoc}
      */
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         if (!class_exists('Symfony\Component\Yaml\Yaml')) {
             throw new LogicException('Dumping translations in the YAML format requires the Symfony Yaml component.');
diff --git a/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php b/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
index bebd6d9162..8d722dad81 100644
--- a/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
+++ b/src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php
@@ -28,14 +28,14 @@ abstract class AbstractFileExtractor
     protected function extractFiles($resource)
     {
         if (\is_array($resource) || $resource instanceof \Traversable) {
-            $files = array();
+            $files = [];
             foreach ($resource as $file) {
                 if ($this->canBeExtracted($file)) {
                     $files[] = $this->toSplFileInfo($file);
                 }
             }
         } elseif (is_file($resource)) {
-            $files = $this->canBeExtracted($resource) ? array($this->toSplFileInfo($resource)) : array();
+            $files = $this->canBeExtracted($resource) ? [$this->toSplFileInfo($resource)] : [];
         } else {
             $files = $this->extractFromDirectory($resource);
         }
diff --git a/src/Symfony/Component/Translation/Extractor/ChainExtractor.php b/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
index 50e3c84579..69ee2dfc39 100644
--- a/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
+++ b/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
@@ -25,7 +25,7 @@ class ChainExtractor implements ExtractorInterface
      *
      * @var ExtractorInterface[]
      */
-    private $extractors = array();
+    private $extractors = [];
 
     /**
      * Adds a loader to the translation extractor.
diff --git a/src/Symfony/Component/Translation/Extractor/PhpExtractor.php b/src/Symfony/Component/Translation/Extractor/PhpExtractor.php
index b4b32361ff..a934653c33 100644
--- a/src/Symfony/Component/Translation/Extractor/PhpExtractor.php
+++ b/src/Symfony/Component/Translation/Extractor/PhpExtractor.php
@@ -37,8 +37,8 @@ class PhpExtractor extends AbstractFileExtractor implements ExtractorInterface
      *
      * @var array
      */
-    protected $sequences = array(
-        array(
+    protected $sequences = [
+        [
             '->',
             'trans',
             '(',
@@ -47,8 +47,8 @@ class PhpExtractor extends AbstractFileExtractor implements ExtractorInterface
             self::METHOD_ARGUMENTS_TOKEN,
             ',',
             self::DOMAIN_TOKEN,
-        ),
-        array(
+        ],
+        [
             '->',
             'transChoice',
             '(',
@@ -59,20 +59,20 @@ class PhpExtractor extends AbstractFileExtractor implements ExtractorInterface
             self::METHOD_ARGUMENTS_TOKEN,
             ',',
             self::DOMAIN_TOKEN,
-        ),
-        array(
+        ],
+        [
             '->',
             'trans',
             '(',
             self::MESSAGE_TOKEN,
-        ),
-        array(
+        ],
+        [
             '->',
             'transChoice',
             '(',
             self::MESSAGE_TOKEN,
-        ),
-    );
+        ],
+    ];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Translation/Extractor/PhpStringTokenParser.php b/src/Symfony/Component/Translation/Extractor/PhpStringTokenParser.php
index e8094e6c08..8a8ccb1f1a 100644
--- a/src/Symfony/Component/Translation/Extractor/PhpStringTokenParser.php
+++ b/src/Symfony/Component/Translation/Extractor/PhpStringTokenParser.php
@@ -49,7 +49,7 @@ namespace Symfony\Component\Translation\Extractor;
 
 class PhpStringTokenParser
 {
-    protected static $replacements = array(
+    protected static $replacements = [
         '\\' => '\\',
         '$' => '$',
         'n' => "\n",
@@ -58,7 +58,7 @@ class PhpStringTokenParser
         'f' => "\f",
         'v' => "\v",
         'e' => "\x1B",
-    );
+    ];
 
     /**
      * Parses a string token.
@@ -76,8 +76,8 @@ class PhpStringTokenParser
 
         if ('\'' === $str[$bLength]) {
             return str_replace(
-                array('\\\\', '\\\''),
-                array('\\', '\''),
+                ['\\\\', '\\\''],
+                ['\\', '\''],
                 substr($str, $bLength + 1, -1)
             );
         } else {
@@ -101,7 +101,7 @@ class PhpStringTokenParser
 
         return preg_replace_callback(
             '~\\\\([\\\\$nrtfve]|[xX][0-9a-fA-F]{1,2}|[0-7]{1,3})~',
-            array(__CLASS__, 'parseCallback'),
+            [__CLASS__, 'parseCallback'],
             $str
         );
     }
diff --git a/src/Symfony/Component/Translation/Formatter/ChoiceMessageFormatterInterface.php b/src/Symfony/Component/Translation/Formatter/ChoiceMessageFormatterInterface.php
index 6bc68384af..621dbb292d 100644
--- a/src/Symfony/Component/Translation/Formatter/ChoiceMessageFormatterInterface.php
+++ b/src/Symfony/Component/Translation/Formatter/ChoiceMessageFormatterInterface.php
@@ -28,5 +28,5 @@ interface ChoiceMessageFormatterInterface
      *
      * @return string
      */
-    public function choiceFormat($message, $number, $locale, array $parameters = array());
+    public function choiceFormat($message, $number, $locale, array $parameters = []);
 }
diff --git a/src/Symfony/Component/Translation/Formatter/IntlFormatter.php b/src/Symfony/Component/Translation/Formatter/IntlFormatter.php
index 338d5151f5..1d5f468d46 100644
--- a/src/Symfony/Component/Translation/Formatter/IntlFormatter.php
+++ b/src/Symfony/Component/Translation/Formatter/IntlFormatter.php
@@ -21,12 +21,12 @@ use Symfony\Component\Translation\Exception\LogicException;
 class IntlFormatter implements IntlFormatterInterface
 {
     private $hasMessageFormatter;
-    private $cache = array();
+    private $cache = [];
 
     /**
      * {@inheritdoc}
      */
-    public function formatIntl(string $message, string $locale, array $parameters = array()): string
+    public function formatIntl(string $message, string $locale, array $parameters = []): string
     {
         if (!$formatter = $this->cache[$locale][$message] ?? null) {
             if (!($this->hasMessageFormatter ?? $this->hasMessageFormatter = class_exists(\MessageFormatter::class))) {
@@ -40,7 +40,7 @@ class IntlFormatter implements IntlFormatterInterface
         }
 
         foreach ($parameters as $key => $value) {
-            if (\in_array($key[0] ?? null, array('%', '{'), true)) {
+            if (\in_array($key[0] ?? null, ['%', '{'], true)) {
                 unset($parameters[$key]);
                 $parameters[trim($key, '%{ }')] = $value;
             }
diff --git a/src/Symfony/Component/Translation/Formatter/IntlFormatterInterface.php b/src/Symfony/Component/Translation/Formatter/IntlFormatterInterface.php
index 5fc5d97d24..02fc6acbdf 100644
--- a/src/Symfony/Component/Translation/Formatter/IntlFormatterInterface.php
+++ b/src/Symfony/Component/Translation/Formatter/IntlFormatterInterface.php
@@ -23,5 +23,5 @@ interface IntlFormatterInterface
      *
      * @see http://icu-project.org/apiref/icu4c/classMessageFormat.html#details
      */
-    public function formatIntl(string $message, string $locale, array $parameters = array()): string;
+    public function formatIntl(string $message, string $locale, array $parameters = []): string;
 }
diff --git a/src/Symfony/Component/Translation/Formatter/MessageFormatter.php b/src/Symfony/Component/Translation/Formatter/MessageFormatter.php
index e36f242c89..030d7a5c3e 100644
--- a/src/Symfony/Component/Translation/Formatter/MessageFormatter.php
+++ b/src/Symfony/Component/Translation/Formatter/MessageFormatter.php
@@ -42,7 +42,7 @@ class MessageFormatter implements MessageFormatterInterface, IntlFormatterInterf
     /**
      * {@inheritdoc}
      */
-    public function format($message, $locale, array $parameters = array())
+    public function format($message, $locale, array $parameters = [])
     {
         if ($this->translator instanceof TranslatorInterface) {
             return $this->translator->trans($message, $parameters, null, $locale);
@@ -54,7 +54,7 @@ class MessageFormatter implements MessageFormatterInterface, IntlFormatterInterf
     /**
      * {@inheritdoc}
      */
-    public function formatIntl(string $message, string $locale, array $parameters = array()): string
+    public function formatIntl(string $message, string $locale, array $parameters = []): string
     {
         return $this->intlFormatter->formatIntl($message, $locale, $parameters);
     }
@@ -64,16 +64,16 @@ class MessageFormatter implements MessageFormatterInterface, IntlFormatterInterf
      *
      * @deprecated since Symfony 4.2, use format() with a %count% parameter instead
      */
-    public function choiceFormat($message, $number, $locale, array $parameters = array())
+    public function choiceFormat($message, $number, $locale, array $parameters = [])
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the format() one instead with a %%count%% parameter.', __METHOD__), E_USER_DEPRECATED);
 
-        $parameters = array('%count%' => $number) + $parameters;
+        $parameters = ['%count%' => $number] + $parameters;
 
         if ($this->translator instanceof TranslatorInterface) {
             return $this->format($message, $locale, $parameters);
         }
 
-        return $this->format($this->translator->transChoice($message, $number, array(), null, $locale), $locale, $parameters);
+        return $this->format($this->translator->transChoice($message, $number, [], null, $locale), $locale, $parameters);
     }
 }
diff --git a/src/Symfony/Component/Translation/Formatter/MessageFormatterInterface.php b/src/Symfony/Component/Translation/Formatter/MessageFormatterInterface.php
index 86937fb2f0..370c055866 100644
--- a/src/Symfony/Component/Translation/Formatter/MessageFormatterInterface.php
+++ b/src/Symfony/Component/Translation/Formatter/MessageFormatterInterface.php
@@ -26,5 +26,5 @@ interface MessageFormatterInterface
      *
      * @return string
      */
-    public function format($message, $locale, array $parameters = array());
+    public function format($message, $locale, array $parameters = []);
 }
diff --git a/src/Symfony/Component/Translation/IdentityTranslator.php b/src/Symfony/Component/Translation/IdentityTranslator.php
index 31abdaab12..41807af04a 100644
--- a/src/Symfony/Component/Translation/IdentityTranslator.php
+++ b/src/Symfony/Component/Translation/IdentityTranslator.php
@@ -43,7 +43,7 @@ class IdentityTranslator implements LegacyTranslatorInterface, TranslatorInterfa
      *
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%count%" parameter.', __METHOD__), E_USER_DEPRECATED);
 
@@ -51,7 +51,7 @@ class IdentityTranslator implements LegacyTranslatorInterface, TranslatorInterfa
             return strtr($this->selector->choose((string) $id, $number, $locale ?: $this->getLocale()), $parameters);
         }
 
-        return $this->trans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+        return $this->trans($id, ['%count%' => $number] + $parameters, $domain, $locale);
     }
 
     private function getPluralizationRule(int $number, string $locale): int
diff --git a/src/Symfony/Component/Translation/Loader/ArrayLoader.php b/src/Symfony/Component/Translation/Loader/ArrayLoader.php
index 7bbfca68a4..0a6f9f089d 100644
--- a/src/Symfony/Component/Translation/Loader/ArrayLoader.php
+++ b/src/Symfony/Component/Translation/Loader/ArrayLoader.php
@@ -36,7 +36,7 @@ class ArrayLoader implements LoaderInterface
      * Flattens an nested array of translations.
      *
      * The scheme used is:
-     *   'key' => array('key2' => array('key3' => 'value'))
+     *   'key' => ['key2' => ['key3' => 'value']]
      * Becomes:
      *   'key.key2.key3' => 'value'
      *
diff --git a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
index 8a763e725d..18cc83ed68 100644
--- a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
@@ -29,7 +29,7 @@ class CsvFileLoader extends FileLoader
      */
     protected function loadResource($resource)
     {
-        $messages = array();
+        $messages = [];
 
         try {
             $file = new \SplFileObject($resource, 'rb');
diff --git a/src/Symfony/Component/Translation/Loader/FileLoader.php b/src/Symfony/Component/Translation/Loader/FileLoader.php
index 9a02f52506..7ec54a3c87 100644
--- a/src/Symfony/Component/Translation/Loader/FileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/FileLoader.php
@@ -37,7 +37,7 @@ abstract class FileLoader extends ArrayLoader
 
         // empty resource
         if (null === $messages) {
-            $messages = array();
+            $messages = [];
         }
 
         // not an array
diff --git a/src/Symfony/Component/Translation/Loader/IcuResFileLoader.php b/src/Symfony/Component/Translation/Loader/IcuResFileLoader.php
index 28ace29775..005f26084d 100644
--- a/src/Symfony/Component/Translation/Loader/IcuResFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/IcuResFileLoader.php
@@ -75,7 +75,7 @@ class IcuResFileLoader implements LoaderInterface
      *
      * @return array the flattened ResourceBundle
      */
-    protected function flatten(\ResourceBundle $rb, array &$messages = array(), $path = null)
+    protected function flatten(\ResourceBundle $rb, array &$messages = [], $path = null)
     {
         foreach ($rb as $key => $value) {
             $nodePath = $path ? $path.'.'.$key : $key;
diff --git a/src/Symfony/Component/Translation/Loader/JsonFileLoader.php b/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
index ce4e91ff4f..526721277d 100644
--- a/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
@@ -25,7 +25,7 @@ class JsonFileLoader extends FileLoader
      */
     protected function loadResource($resource)
     {
-        $messages = array();
+        $messages = [];
         if ($data = file_get_contents($resource)) {
             $messages = json_decode($data, true);
 
diff --git a/src/Symfony/Component/Translation/Loader/MoFileLoader.php b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
index a1d7c4aef5..16a3dfc618 100644
--- a/src/Symfony/Component/Translation/Loader/MoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
@@ -71,7 +71,7 @@ class MoFileLoader extends FileLoader
         // offsetHashes
         $this->readLong($stream, $isBigEndian);
 
-        $messages = array();
+        $messages = [];
 
         for ($i = 0; $i < $count; ++$i) {
             $pluralId = null;
@@ -108,13 +108,13 @@ class MoFileLoader extends FileLoader
                 $translated = explode("\000", $translated);
             }
 
-            $ids = array('singular' => $singularId, 'plural' => $pluralId);
+            $ids = ['singular' => $singularId, 'plural' => $pluralId];
             $item = compact('ids', 'translated');
 
             if (\is_array($item['translated'])) {
                 $messages[$item['ids']['singular']] = stripcslashes($item['translated'][0]);
                 if (isset($item['ids']['plural'])) {
-                    $plurals = array();
+                    $plurals = [];
                     foreach ($item['translated'] as $plural => $translated) {
                         $plurals[] = sprintf('{%d} %s', $plural, $translated);
                     }
diff --git a/src/Symfony/Component/Translation/Loader/PoFileLoader.php b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
index 066168dc71..1412a786a7 100644
--- a/src/Symfony/Component/Translation/Loader/PoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
@@ -64,14 +64,14 @@ class PoFileLoader extends FileLoader
     {
         $stream = fopen($resource, 'r');
 
-        $defaults = array(
-            'ids' => array(),
+        $defaults = [
+            'ids' => [],
             'translated' => null,
-        );
+        ];
 
-        $messages = array();
+        $messages = [];
         $item = $defaults;
-        $flags = array();
+        $flags = [];
 
         while ($line = fgets($stream)) {
             $line = trim($line);
@@ -82,7 +82,7 @@ class PoFileLoader extends FileLoader
                     $this->addMessage($messages, $item);
                 }
                 $item = $defaults;
-                $flags = array();
+                $flags = [];
             } elseif ('#,' === substr($line, 0, 2)) {
                 $flags = array_map('trim', explode(',', substr($line, 2)));
             } elseif ('msgid "' === substr($line, 0, 7)) {
diff --git a/src/Symfony/Component/Translation/LoggingTranslator.php b/src/Symfony/Component/Translation/LoggingTranslator.php
index 4fe756d7a7..62314b309d 100644
--- a/src/Symfony/Component/Translation/LoggingTranslator.php
+++ b/src/Symfony/Component/Translation/LoggingTranslator.php
@@ -49,7 +49,7 @@ class LoggingTranslator implements TranslatorInterface, LegacyTranslatorInterfac
     /**
      * {@inheritdoc}
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         $trans = $this->translator->trans($id, $parameters, $domain, $locale);
         $this->log($id, $domain, $locale);
@@ -62,12 +62,12 @@ class LoggingTranslator implements TranslatorInterface, LegacyTranslatorInterfac
      *
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%count%" parameter.', __METHOD__), E_USER_DEPRECATED);
 
         if ($this->translator instanceof TranslatorInterface) {
-            $trans = $this->translator->trans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+            $trans = $this->translator->trans($id, ['%count%' => $number] + $parameters, $domain, $locale);
         } else {
             $trans = $this->translator->transChoice($id, $number, $parameters, $domain, $locale);
         }
@@ -112,7 +112,7 @@ class LoggingTranslator implements TranslatorInterface, LegacyTranslatorInterfac
             return $this->translator->getFallbackLocales();
         }
 
-        return array();
+        return [];
     }
 
     /**
@@ -143,9 +143,9 @@ class LoggingTranslator implements TranslatorInterface, LegacyTranslatorInterfac
         }
 
         if ($catalogue->has($id, $domain)) {
-            $this->logger->debug('Translation use fallback catalogue.', array('id' => $id, 'domain' => $domain, 'locale' => $catalogue->getLocale()));
+            $this->logger->debug('Translation use fallback catalogue.', ['id' => $id, 'domain' => $domain, 'locale' => $catalogue->getLocale()]);
         } else {
-            $this->logger->warning('Translation not found.', array('id' => $id, 'domain' => $domain, 'locale' => $catalogue->getLocale()));
+            $this->logger->warning('Translation not found.', ['id' => $id, 'domain' => $domain, 'locale' => $catalogue->getLocale()]);
         }
     }
 }
diff --git a/src/Symfony/Component/Translation/MessageCatalogue.php b/src/Symfony/Component/Translation/MessageCatalogue.php
index 7a7657c0a4..19afb903f7 100644
--- a/src/Symfony/Component/Translation/MessageCatalogue.php
+++ b/src/Symfony/Component/Translation/MessageCatalogue.php
@@ -19,9 +19,9 @@ use Symfony\Component\Translation\Exception\LogicException;
  */
 class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterface
 {
-    private $messages = array();
-    private $metadata = array();
-    private $resources = array();
+    private $messages = [];
+    private $metadata = [];
+    private $resources = [];
     private $locale;
     private $fallbackCatalogue;
     private $parent;
@@ -30,7 +30,7 @@ class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterf
      * @param string $locale   The locale
      * @param array  $messages An array of messages classified by domain
      */
-    public function __construct(?string $locale, array $messages = array())
+    public function __construct(?string $locale, array $messages = [])
     {
         $this->locale = $locale;
         $this->messages = $messages;
@@ -49,7 +49,7 @@ class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterf
      */
     public function getDomains()
     {
-        $domains = array();
+        $domains = [];
         $suffixLength = \strlen(self::INTL_DOMAIN_SUFFIX);
 
         foreach ($this->messages as $domain => $messages) {
@@ -68,18 +68,18 @@ class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterf
     public function all($domain = null)
     {
         if (null !== $domain) {
-            return ($this->messages[$domain.self::INTL_DOMAIN_SUFFIX] ?? array()) + ($this->messages[$domain] ?? array());
+            return ($this->messages[$domain.self::INTL_DOMAIN_SUFFIX] ?? []) + ($this->messages[$domain] ?? []);
         }
 
-        $allMessages = array();
+        $allMessages = [];
         $suffixLength = \strlen(self::INTL_DOMAIN_SUFFIX);
 
         foreach ($this->messages as $domain => $messages) {
             if (\strlen($domain) > $suffixLength && false !== $i = strpos($domain, self::INTL_DOMAIN_SUFFIX, -$suffixLength)) {
                 $domain = substr($domain, 0, $i);
-                $allMessages[$domain] = $messages + ($allMessages[$domain] ?? array());
+                $allMessages[$domain] = $messages + ($allMessages[$domain] ?? []);
             } else {
-                $allMessages[$domain] = ($allMessages[$domain] ?? array()) + $messages;
+                $allMessages[$domain] = ($allMessages[$domain] ?? []) + $messages;
             }
         }
 
@@ -91,7 +91,7 @@ class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterf
      */
     public function set($id, $translation, $domain = 'messages')
     {
-        $this->add(array($id => $translation), $domain);
+        $this->add([$id => $translation], $domain);
     }
 
     /**
@@ -277,7 +277,7 @@ class MessageCatalogue implements MessageCatalogueInterface, MetadataAwareInterf
     public function deleteMetadata($key = '', $domain = 'messages')
     {
         if ('' == $domain) {
-            $this->metadata = array();
+            $this->metadata = [];
         } elseif ('' == $key) {
             unset($this->metadata[$domain]);
         } else {
diff --git a/src/Symfony/Component/Translation/MessageSelector.php b/src/Symfony/Component/Translation/MessageSelector.php
index 06639417b6..0f0febb8b2 100644
--- a/src/Symfony/Component/Translation/MessageSelector.php
+++ b/src/Symfony/Component/Translation/MessageSelector.php
@@ -53,15 +53,15 @@ class MessageSelector
      */
     public function choose($message, $number, $locale)
     {
-        $parts = array();
+        $parts = [];
         if (preg_match('/^\|++$/', $message)) {
             $parts = explode('|', $message);
         } elseif (preg_match_all('/(?:\|\||[^\|])++/', $message, $matches)) {
             $parts = $matches[0];
         }
 
-        $explicitRules = array();
-        $standardRules = array();
+        $explicitRules = [];
+        $standardRules = [];
         foreach ($parts as $part) {
             $part = trim(str_replace('||', '|', $part));
 
diff --git a/src/Symfony/Component/Translation/PluralizationRules.php b/src/Symfony/Component/Translation/PluralizationRules.php
index efbfd7f225..ee8609fada 100644
--- a/src/Symfony/Component/Translation/PluralizationRules.php
+++ b/src/Symfony/Component/Translation/PluralizationRules.php
@@ -20,7 +20,7 @@ namespace Symfony\Component\Translation;
  */
 class PluralizationRules
 {
-    private static $rules = array();
+    private static $rules = [];
 
     /**
      * Returns the plural position to use for the given locale and number.
diff --git a/src/Symfony/Component/Translation/Reader/TranslationReader.php b/src/Symfony/Component/Translation/Reader/TranslationReader.php
index 948edec492..e4554f39b4 100644
--- a/src/Symfony/Component/Translation/Reader/TranslationReader.php
+++ b/src/Symfony/Component/Translation/Reader/TranslationReader.php
@@ -27,7 +27,7 @@ class TranslationReader implements TranslationReaderInterface
      *
      * @var array
      */
-    private $loaders = array();
+    private $loaders = [];
 
     /**
      * Adds a loader to the translation extractor.
diff --git a/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php b/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
index cc098881d3..f82b18fdd7 100644
--- a/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
+++ b/src/Symfony/Component/Translation/Tests/Catalogue/AbstractOperationTest.php
@@ -20,7 +20,7 @@ abstract class AbstractOperationTest extends TestCase
     public function testGetEmptyDomains()
     {
         $this->assertEquals(
-            array(),
+            [],
             $this->createOperation(
                 new MessageCatalogue('en'),
                 new MessageCatalogue('en')
@@ -31,10 +31,10 @@ abstract class AbstractOperationTest extends TestCase
     public function testGetMergedDomains()
     {
         $this->assertEquals(
-            array('a', 'b', 'c'),
+            ['a', 'b', 'c'],
             $this->createOperation(
-                new MessageCatalogue('en', array('a' => array(), 'b' => array())),
-                new MessageCatalogue('en', array('b' => array(), 'c' => array()))
+                new MessageCatalogue('en', ['a' => [], 'b' => []]),
+                new MessageCatalogue('en', ['b' => [], 'c' => []])
             )->getDomains()
         );
     }
@@ -51,9 +51,9 @@ abstract class AbstractOperationTest extends TestCase
     public function testGetEmptyMessages()
     {
         $this->assertEquals(
-            array(),
+            [],
             $this->createOperation(
-                new MessageCatalogue('en', array('a' => array())),
+                new MessageCatalogue('en', ['a' => []]),
                 new MessageCatalogue('en')
             )->getMessages('a')
         );
diff --git a/src/Symfony/Component/Translation/Tests/Catalogue/MergeOperationTest.php b/src/Symfony/Component/Translation/Tests/Catalogue/MergeOperationTest.php
index 9a68847882..22af86e906 100644
--- a/src/Symfony/Component/Translation/Tests/Catalogue/MergeOperationTest.php
+++ b/src/Symfony/Component/Translation/Tests/Catalogue/MergeOperationTest.php
@@ -20,22 +20,22 @@ class MergeOperationTest extends AbstractOperationTest
     public function testGetMessagesFromSingleDomain()
     {
         $operation = $this->createOperation(
-            new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b'))),
-            new MessageCatalogue('en', array('messages' => array('a' => 'new_a', 'c' => 'new_c')))
+            new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]),
+            new MessageCatalogue('en', ['messages' => ['a' => 'new_a', 'c' => 'new_c']])
         );
 
         $this->assertEquals(
-            array('a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c'),
+            ['a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c'],
             $operation->getMessages('messages')
         );
 
         $this->assertEquals(
-            array('c' => 'new_c'),
+            ['c' => 'new_c'],
             $operation->getNewMessages('messages')
         );
 
         $this->assertEquals(
-            array(),
+            [],
             $operation->getObsoleteMessages('messages')
         );
     }
@@ -43,12 +43,12 @@ class MergeOperationTest extends AbstractOperationTest
     public function testGetResultFromSingleDomain()
     {
         $this->assertEquals(
-            new MessageCatalogue('en', array(
-                'messages' => array('a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c'),
-            )),
+            new MessageCatalogue('en', [
+                'messages' => ['a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c'],
+            ]),
             $this->createOperation(
-                new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b'))),
-                new MessageCatalogue('en', array('messages' => array('a' => 'new_a', 'c' => 'new_c')))
+                new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]),
+                new MessageCatalogue('en', ['messages' => ['a' => 'new_a', 'c' => 'new_c']])
             )->getResult()
         );
     }
@@ -56,27 +56,27 @@ class MergeOperationTest extends AbstractOperationTest
     public function testGetResultFromIntlDomain()
     {
         $this->assertEquals(
-            new MessageCatalogue('en', array(
-                'messages' => array('a' => 'old_a', 'b' => 'old_b'),
-                'messages+intl-icu' => array('d' => 'old_d', 'c' => 'new_c'),
-            )),
+            new MessageCatalogue('en', [
+                'messages' => ['a' => 'old_a', 'b' => 'old_b'],
+                'messages+intl-icu' => ['d' => 'old_d', 'c' => 'new_c'],
+            ]),
             $this->createOperation(
-                new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b'), 'messages+intl-icu' => array('d' => 'old_d'))),
-                new MessageCatalogue('en', array('messages+intl-icu' => array('a' => 'new_a', 'c' => 'new_c')))
+                new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b'], 'messages+intl-icu' => ['d' => 'old_d']]),
+                new MessageCatalogue('en', ['messages+intl-icu' => ['a' => 'new_a', 'c' => 'new_c']])
             )->getResult()
         );
     }
 
     public function testGetResultWithMetadata()
     {
-        $leftCatalogue = new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b')));
+        $leftCatalogue = new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]);
         $leftCatalogue->setMetadata('a', 'foo', 'messages');
         $leftCatalogue->setMetadata('b', 'bar', 'messages');
-        $rightCatalogue = new MessageCatalogue('en', array('messages' => array('b' => 'new_b', 'c' => 'new_c')));
+        $rightCatalogue = new MessageCatalogue('en', ['messages' => ['b' => 'new_b', 'c' => 'new_c']]);
         $rightCatalogue->setMetadata('b', 'baz', 'messages');
         $rightCatalogue->setMetadata('c', 'qux', 'messages');
 
-        $mergedCatalogue = new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c')));
+        $mergedCatalogue = new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b', 'c' => 'new_c']]);
         $mergedCatalogue->setMetadata('a', 'foo', 'messages');
         $mergedCatalogue->setMetadata('b', 'bar', 'messages');
         $mergedCatalogue->setMetadata('c', 'qux', 'messages');
diff --git a/src/Symfony/Component/Translation/Tests/Catalogue/TargetOperationTest.php b/src/Symfony/Component/Translation/Tests/Catalogue/TargetOperationTest.php
index 83b0550d45..570b503aea 100644
--- a/src/Symfony/Component/Translation/Tests/Catalogue/TargetOperationTest.php
+++ b/src/Symfony/Component/Translation/Tests/Catalogue/TargetOperationTest.php
@@ -20,22 +20,22 @@ class TargetOperationTest extends AbstractOperationTest
     public function testGetMessagesFromSingleDomain()
     {
         $operation = $this->createOperation(
-            new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b'))),
-            new MessageCatalogue('en', array('messages' => array('a' => 'new_a', 'c' => 'new_c')))
+            new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]),
+            new MessageCatalogue('en', ['messages' => ['a' => 'new_a', 'c' => 'new_c']])
         );
 
         $this->assertEquals(
-            array('a' => 'old_a', 'c' => 'new_c'),
+            ['a' => 'old_a', 'c' => 'new_c'],
             $operation->getMessages('messages')
         );
 
         $this->assertEquals(
-            array('c' => 'new_c'),
+            ['c' => 'new_c'],
             $operation->getNewMessages('messages')
         );
 
         $this->assertEquals(
-            array('b' => 'old_b'),
+            ['b' => 'old_b'],
             $operation->getObsoleteMessages('messages')
         );
     }
@@ -43,12 +43,12 @@ class TargetOperationTest extends AbstractOperationTest
     public function testGetResultFromSingleDomain()
     {
         $this->assertEquals(
-            new MessageCatalogue('en', array(
-                'messages' => array('a' => 'old_a', 'c' => 'new_c'),
-            )),
+            new MessageCatalogue('en', [
+                'messages' => ['a' => 'old_a', 'c' => 'new_c'],
+            ]),
             $this->createOperation(
-                new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b'))),
-                new MessageCatalogue('en', array('messages' => array('a' => 'new_a', 'c' => 'new_c')))
+                new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]),
+                new MessageCatalogue('en', ['messages' => ['a' => 'new_a', 'c' => 'new_c']])
             )->getResult()
         );
     }
@@ -56,27 +56,27 @@ class TargetOperationTest extends AbstractOperationTest
     public function testGetResultFromIntlDomain()
     {
         $this->assertEquals(
-            new MessageCatalogue('en', array(
-                'messages' => array('a' => 'old_a'),
-                'messages+intl-icu' => array('c' => 'new_c'),
-            )),
+            new MessageCatalogue('en', [
+                'messages' => ['a' => 'old_a'],
+                'messages+intl-icu' => ['c' => 'new_c'],
+            ]),
             $this->createOperation(
-                new MessageCatalogue('en', array('messages' => array('a' => 'old_a'), 'messages+intl-icu' => array('b' => 'old_b'))),
-                new MessageCatalogue('en', array('messages' => array('a' => 'new_a'), 'messages+intl-icu' => array('c' => 'new_c')))
+                new MessageCatalogue('en', ['messages' => ['a' => 'old_a'], 'messages+intl-icu' => ['b' => 'old_b']]),
+                new MessageCatalogue('en', ['messages' => ['a' => 'new_a'], 'messages+intl-icu' => ['c' => 'new_c']])
             )->getResult()
         );
     }
 
     public function testGetResultWithMetadata()
     {
-        $leftCatalogue = new MessageCatalogue('en', array('messages' => array('a' => 'old_a', 'b' => 'old_b')));
+        $leftCatalogue = new MessageCatalogue('en', ['messages' => ['a' => 'old_a', 'b' => 'old_b']]);
         $leftCatalogue->setMetadata('a', 'foo', 'messages');
         $leftCatalogue->setMetadata('b', 'bar', 'messages');
-        $rightCatalogue = new MessageCatalogue('en', array('messages' => array('b' => 'new_b', 'c' => 'new_c')));
+        $rightCatalogue = new MessageCatalogue('en', ['messages' => ['b' => 'new_b', 'c' => 'new_c']]);
         $rightCatalogue->setMetadata('b', 'baz', 'messages');
         $rightCatalogue->setMetadata('c', 'qux', 'messages');
 
-        $diffCatalogue = new MessageCatalogue('en', array('messages' => array('b' => 'old_b', 'c' => 'new_c')));
+        $diffCatalogue = new MessageCatalogue('en', ['messages' => ['b' => 'old_b', 'c' => 'new_c']]);
         $diffCatalogue->setMetadata('b', 'bar', 'messages');
         $diffCatalogue->setMetadata('c', 'qux', 'messages');
 
diff --git a/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php b/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
index 758ac981ac..516d98af53 100644
--- a/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
+++ b/src/Symfony/Component/Translation/Tests/Command/XliffLintCommandTest.php
@@ -32,8 +32,8 @@ class XliffLintCommandTest extends TestCase
         $filename = $this->createFile();
 
         $tester->execute(
-            array('filename' => $filename),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => $filename],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
@@ -47,8 +47,8 @@ class XliffLintCommandTest extends TestCase
         $filename2 = $this->createFile();
 
         $tester->execute(
-            array('filename' => array($filename1, $filename2)),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => [$filename1, $filename2]],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals(0, $tester->getStatusCode(), 'Returns 0 in case of success');
@@ -64,8 +64,8 @@ class XliffLintCommandTest extends TestCase
         $filename = $this->createFile('note', $targetLanguage, $fileNamePattern);
 
         $tester->execute(
-            array('filename' => $filename),
-            array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false)
+            ['filename' => $filename],
+            ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]
         );
 
         $this->assertEquals($mustFail ? 1 : 0, $tester->getStatusCode());
@@ -77,7 +77,7 @@ class XliffLintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile('note <target>');
 
-        $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
 
         $this->assertEquals(1, $tester->getStatusCode(), 'Returns 1 in case of error');
         $this->assertContains('Opening and ending tag mismatch: target line 6 and source', trim($tester->getDisplay()));
@@ -88,7 +88,7 @@ class XliffLintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile('note', 'es');
 
-        $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
 
         $this->assertEquals(1, $tester->getStatusCode(), 'Returns 1 in case of error');
         $this->assertContains('There is a mismatch between the language included in the file name ("messages.en.xlf") and the "es" value used in the "target-language" attribute of the file.', trim($tester->getDisplay()));
@@ -103,7 +103,7 @@ class XliffLintCommandTest extends TestCase
         $filename = $this->createFile();
         unlink($filename);
 
-        $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $tester->execute(['filename' => $filename], ['decorated' => false]);
     }
 
     public function testGetHelp()
@@ -179,7 +179,7 @@ XLIFF;
 
     protected function setUp()
     {
-        $this->files = array();
+        $this->files = [];
         @mkdir(sys_get_temp_dir().'/translation-xliff-lint-test');
     }
 
@@ -195,13 +195,13 @@ XLIFF;
 
     public function provideStrictFilenames()
     {
-        yield array(false, 'messages.%locale%.xlf', 'en', false);
-        yield array(false, 'messages.%locale%.xlf', 'es', true);
-        yield array(false, '%locale%.messages.xlf', 'en', false);
-        yield array(false, '%locale%.messages.xlf', 'es', true);
-        yield array(true, 'messages.%locale%.xlf', 'en', false);
-        yield array(true, 'messages.%locale%.xlf', 'es', true);
-        yield array(true, '%locale%.messages.xlf', 'en', true);
-        yield array(true, '%locale%.messages.xlf', 'es', true);
+        yield [false, 'messages.%locale%.xlf', 'en', false];
+        yield [false, 'messages.%locale%.xlf', 'es', true];
+        yield [false, '%locale%.messages.xlf', 'en', false];
+        yield [false, '%locale%.messages.xlf', 'es', true];
+        yield [true, 'messages.%locale%.xlf', 'en', false];
+        yield [true, 'messages.%locale%.xlf', 'es', true];
+        yield [true, '%locale%.messages.xlf', 'en', true];
+        yield [true, '%locale%.messages.xlf', 'es', true];
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php b/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
index 6665eca499..b4d350ef86 100644
--- a/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
+++ b/src/Symfony/Component/Translation/Tests/DataCollector/TranslationDataCollectorTest.php
@@ -27,7 +27,7 @@ class TranslationDataCollectorTest extends TestCase
     public function testCollectEmptyMessages()
     {
         $translator = $this->getTranslator();
-        $translator->expects($this->any())->method('getCollectedMessages')->will($this->returnValue(array()));
+        $translator->expects($this->any())->method('getCollectedMessages')->will($this->returnValue([]));
 
         $dataCollector = new TranslationDataCollector($translator);
         $dataCollector->lateCollect();
@@ -35,94 +35,94 @@ class TranslationDataCollectorTest extends TestCase
         $this->assertEquals(0, $dataCollector->getCountMissings());
         $this->assertEquals(0, $dataCollector->getCountFallbacks());
         $this->assertEquals(0, $dataCollector->getCountDefines());
-        $this->assertEquals(array(), $dataCollector->getMessages()->getValue());
+        $this->assertEquals([], $dataCollector->getMessages()->getValue());
     }
 
     public function testCollect()
     {
-        $collectedMessages = array(
-            array(
+        $collectedMessages = [
+            [
                 'id' => 'foo',
                 'translation' => 'foo (en)',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_DEFINED,
-                'parameters' => array(),
+                'parameters' => [],
                 'transChoiceNumber' => null,
-            ),
-            array(
+            ],
+            [
                 'id' => 'bar',
                 'translation' => 'bar (fr)',
                 'locale' => 'fr',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
-                'parameters' => array(),
+                'parameters' => [],
                 'transChoiceNumber' => null,
-            ),
-            array(
+            ],
+            [
                 'id' => 'choice',
                 'translation' => 'choice',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_MISSING,
-                'parameters' => array('%count%' => 3),
+                'parameters' => ['%count%' => 3],
                 'transChoiceNumber' => 3,
-            ),
-            array(
+            ],
+            [
                 'id' => 'choice',
                 'translation' => 'choice',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_MISSING,
-                'parameters' => array('%count%' => 3),
+                'parameters' => ['%count%' => 3],
                 'transChoiceNumber' => 3,
-            ),
-            array(
+            ],
+            [
                 'id' => 'choice',
                 'translation' => 'choice',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_MISSING,
-                'parameters' => array('%count%' => 4, '%foo%' => 'bar'),
+                'parameters' => ['%count%' => 4, '%foo%' => 'bar'],
                 'transChoiceNumber' => 4,
-            ),
-        );
-        $expectedMessages = array(
-            array(
+            ],
+        ];
+        $expectedMessages = [
+            [
                 'id' => 'foo',
                 'translation' => 'foo (en)',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_DEFINED,
                 'count' => 1,
-                'parameters' => array(),
+                'parameters' => [],
                 'transChoiceNumber' => null,
-            ),
-            array(
+            ],
+            [
                 'id' => 'bar',
                 'translation' => 'bar (fr)',
                 'locale' => 'fr',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
                 'count' => 1,
-                'parameters' => array(),
+                'parameters' => [],
                 'transChoiceNumber' => null,
-            ),
-            array(
+            ],
+            [
                 'id' => 'choice',
                 'translation' => 'choice',
                 'locale' => 'en',
                 'domain' => 'messages',
                 'state' => DataCollectorTranslator::MESSAGE_MISSING,
                 'count' => 3,
-                'parameters' => array(
-                    array('%count%' => 3),
-                    array('%count%' => 3),
-                    array('%count%' => 4, '%foo%' => 'bar'),
-                ),
+                'parameters' => [
+                    ['%count%' => 3],
+                    ['%count%' => 3],
+                    ['%count%' => 4, '%foo%' => 'bar'],
+                ],
                 'transChoiceNumber' => 3,
-            ),
-        );
+            ],
+        ];
 
         $translator = $this->getTranslator();
         $translator->expects($this->any())->method('getCollectedMessages')->will($this->returnValue($collectedMessages));
diff --git a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
index 19e056c12e..138172e21d 100644
--- a/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/DataCollectorTranslatorTest.php
@@ -21,60 +21,60 @@ class DataCollectorTranslatorTest extends TestCase
     public function testCollectMessages()
     {
         $collector = $this->createCollector();
-        $collector->setFallbackLocales(array('fr', 'ru'));
+        $collector->setFallbackLocales(['fr', 'ru']);
 
         $collector->trans('foo');
         $collector->trans('bar');
-        $collector->trans('choice', array('%count%' => 0));
+        $collector->trans('choice', ['%count%' => 0]);
         $collector->trans('bar_ru');
-        $collector->trans('bar_ru', array('foo' => 'bar'));
+        $collector->trans('bar_ru', ['foo' => 'bar']);
 
-        $expectedMessages = array();
-        $expectedMessages[] = array(
+        $expectedMessages = [];
+        $expectedMessages[] = [
             'id' => 'foo',
             'translation' => 'foo (en)',
             'locale' => 'en',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_DEFINED,
-            'parameters' => array(),
+            'parameters' => [],
             'transChoiceNumber' => null,
-        );
-        $expectedMessages[] = array(
+        ];
+        $expectedMessages[] = [
             'id' => 'bar',
             'translation' => 'bar (fr)',
             'locale' => 'fr',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
-            'parameters' => array(),
+            'parameters' => [],
             'transChoiceNumber' => null,
-        );
-        $expectedMessages[] = array(
+        ];
+        $expectedMessages[] = [
             'id' => 'choice',
             'translation' => 'choice',
             'locale' => 'en',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_MISSING,
-            'parameters' => array('%count%' => 0),
+            'parameters' => ['%count%' => 0],
             'transChoiceNumber' => 0,
-        );
-        $expectedMessages[] = array(
+        ];
+        $expectedMessages[] = [
             'id' => 'bar_ru',
             'translation' => 'bar (ru)',
             'locale' => 'ru',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
-            'parameters' => array(),
+            'parameters' => [],
             'transChoiceNumber' => null,
-        );
-        $expectedMessages[] = array(
+        ];
+        $expectedMessages[] = [
             'id' => 'bar_ru',
             'translation' => 'bar (ru)',
             'locale' => 'ru',
             'domain' => 'messages',
             'state' => DataCollectorTranslator::MESSAGE_EQUALS_FALLBACK,
-            'parameters' => array('foo' => 'bar'),
+            'parameters' => ['foo' => 'bar'],
             'transChoiceNumber' => null,
-        );
+        ];
 
         $this->assertEquals($expectedMessages, $collector->getCollectedMessages());
     }
@@ -85,20 +85,20 @@ class DataCollectorTranslatorTest extends TestCase
     public function testCollectMessagesTransChoice()
     {
         $collector = $this->createCollector();
-        $collector->setFallbackLocales(array('fr', 'ru'));
+        $collector->setFallbackLocales(['fr', 'ru']);
         $collector->transChoice('choice', 0);
 
-        $expectedMessages = array();
+        $expectedMessages = [];
 
-        $expectedMessages[] = array(
+        $expectedMessages[] = [
               'id' => 'choice',
               'translation' => 'choice',
               'locale' => 'en',
               'domain' => 'messages',
               'state' => DataCollectorTranslator::MESSAGE_MISSING,
-              'parameters' => array('%count%' => 0),
+              'parameters' => ['%count%' => 0],
               'transChoiceNumber' => 0,
-        );
+        ];
 
         $this->assertEquals($expectedMessages, $collector->getCollectedMessages());
     }
@@ -107,9 +107,9 @@ class DataCollectorTranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (en)'), 'en');
-        $translator->addResource('array', array('bar' => 'bar (fr)'), 'fr');
-        $translator->addResource('array', array('bar_ru' => 'bar (ru)'), 'ru');
+        $translator->addResource('array', ['foo' => 'foo (en)'], 'en');
+        $translator->addResource('array', ['bar' => 'bar (fr)'], 'fr');
+        $translator->addResource('array', ['bar_ru' => 'bar (ru)'], 'ru');
 
         return new DataCollectorTranslator($translator);
     }
diff --git a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationDumperPassTest.php b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationDumperPassTest.php
index 759bb0e97d..94769e9dae 100644
--- a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationDumperPassTest.php
+++ b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationDumperPassTest.php
@@ -23,12 +23,12 @@ class TranslationDumperPassTest extends TestCase
         $container = new ContainerBuilder();
         $writerDefinition = $container->register('translation.writer');
         $container->register('foo.id')
-            ->addTag('translation.dumper', array('alias' => 'bar.alias'));
+            ->addTag('translation.dumper', ['alias' => 'bar.alias']);
 
         $translationDumperPass = new TranslationDumperPass();
         $translationDumperPass->process($container);
 
-        $this->assertEquals(array(array('addDumper', array('bar.alias', new Reference('foo.id')))), $writerDefinition->getMethodCalls());
+        $this->assertEquals([['addDumper', ['bar.alias', new Reference('foo.id')]]], $writerDefinition->getMethodCalls());
     }
 
     public function testProcessNoDefinitionFound()
diff --git a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationExtractorPassTest.php b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationExtractorPassTest.php
index 14d164d0ee..a638498b6b 100644
--- a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationExtractorPassTest.php
+++ b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationExtractorPassTest.php
@@ -23,12 +23,12 @@ class TranslationExtractorPassTest extends TestCase
         $container = new ContainerBuilder();
         $extractorDefinition = $container->register('translation.extractor');
         $container->register('foo.id')
-            ->addTag('translation.extractor', array('alias' => 'bar.alias'));
+            ->addTag('translation.extractor', ['alias' => 'bar.alias']);
 
         $translationDumperPass = new TranslationExtractorPass();
         $translationDumperPass->process($container);
 
-        $this->assertEquals(array(array('addExtractor', array('bar.alias', new Reference('foo.id')))), $extractorDefinition->getMethodCalls());
+        $this->assertEquals([['addExtractor', ['bar.alias', new Reference('foo.id')]]], $extractorDefinition->getMethodCalls());
     }
 
     public function testProcessNoDefinitionFound()
@@ -56,7 +56,7 @@ class TranslationExtractorPassTest extends TestCase
         $container = new ContainerBuilder();
         $container->register('translation.extractor');
         $container->register('foo.id')
-            ->addTag('translation.extractor', array());
+            ->addTag('translation.extractor', []);
 
         $definition->expects($this->never())->method('addMethodCall');
 
diff --git a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationPassTest.php b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationPassTest.php
index 4082d169c4..8b9c03d991 100644
--- a/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationPassTest.php
+++ b/src/Symfony/Component/Translation/Tests/DependencyInjection/TranslationPassTest.php
@@ -23,12 +23,12 @@ class TranslationPassTest extends TestCase
     public function testValidCollector()
     {
         $loader = (new Definition())
-            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'));
+            ->addTag('translation.loader', ['alias' => 'xliff', 'legacy-alias' => 'xlf']);
 
         $reader = new Definition();
 
         $translator = (new Definition())
-            ->setArguments(array(null, null, null, null));
+            ->setArguments([null, null, null, null]);
 
         $container = new ContainerBuilder();
         $container->setDefinition('translator.default', $translator);
@@ -39,19 +39,19 @@ class TranslationPassTest extends TestCase
         $pass->process($container);
 
         $expectedReader = (new Definition())
-            ->addMethodCall('addLoader', array('xliff', new Reference('translation.xliff_loader')))
-            ->addMethodCall('addLoader', array('xlf', new Reference('translation.xliff_loader')))
+            ->addMethodCall('addLoader', ['xliff', new Reference('translation.xliff_loader')])
+            ->addMethodCall('addLoader', ['xlf', new Reference('translation.xliff_loader')])
         ;
         $this->assertEquals($expectedReader, $reader);
 
         $expectedLoader = (new Definition())
-            ->addTag('translation.loader', array('alias' => 'xliff', 'legacy-alias' => 'xlf'))
+            ->addTag('translation.loader', ['alias' => 'xliff', 'legacy-alias' => 'xlf'])
         ;
         $this->assertEquals($expectedLoader, $loader);
 
-        $this->assertSame(array('translation.xliff_loader' => array('xliff', 'xlf')), $translator->getArgument(3));
+        $this->assertSame(['translation.xliff_loader' => ['xliff', 'xlf']], $translator->getArgument(3));
 
-        $expected = array('translation.xliff_loader' => new ServiceClosureArgument(new Reference('translation.xliff_loader')));
+        $expected = ['translation.xliff_loader' => new ServiceClosureArgument(new Reference('translation.xliff_loader'))];
         $this->assertEquals($expected, $container->getDefinition((string) $translator->getArgument(0))->getArgument(0));
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
index 9a7a059a4e..0d1cf2c628 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/CsvFileDumperTest.php
@@ -20,8 +20,8 @@ class CsvFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar', 'bar' => 'foo
-foo', 'foo;foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar', 'bar' => 'foo
+foo', 'foo;foo' => 'bar']);
 
         $dumper = new CsvFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
index 908f22d748..20fa918bd6 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/FileDumperTest.php
@@ -22,10 +22,10 @@ class FileDumperTest extends TestCase
         $tempDir = sys_get_temp_dir();
 
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new ConcreteFileDumper();
-        $dumper->dump($catalogue, array('path' => $tempDir));
+        $dumper->dump($catalogue, ['path' => $tempDir]);
 
         $this->assertFileExists($tempDir.'/messages.en.concrete');
 
@@ -37,13 +37,13 @@ class FileDumperTest extends TestCase
         $tempDir = sys_get_temp_dir();
 
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'), 'd1');
-        $catalogue->add(array('bar' => 'foo'), 'd1+intl-icu');
-        $catalogue->add(array('bar' => 'foo'), 'd2+intl-icu');
+        $catalogue->add(['foo' => 'bar'], 'd1');
+        $catalogue->add(['bar' => 'foo'], 'd1+intl-icu');
+        $catalogue->add(['bar' => 'foo'], 'd2+intl-icu');
 
         $dumper = new ConcreteFileDumper();
         @unlink($tempDir.'/d2.en.concrete');
-        $dumper->dump($catalogue, array('path' => $tempDir));
+        $dumper->dump($catalogue, ['path' => $tempDir]);
 
         $this->assertStringEqualsFile($tempDir.'/d1.en.concrete', 'foo=bar');
         @unlink($tempDir.'/d1.en.concrete');
@@ -63,11 +63,11 @@ class FileDumperTest extends TestCase
         $file = $translationsDir.'/messages.en.concrete';
 
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new ConcreteFileDumper();
         $dumper->setRelativePathTemplate('test/translations/%domain%.%locale%.%extension%');
-        $dumper->dump($catalogue, array('path' => $tempDir));
+        $dumper->dump($catalogue, ['path' => $tempDir]);
 
         $this->assertFileExists($file);
 
@@ -78,7 +78,7 @@ class FileDumperTest extends TestCase
 
 class ConcreteFileDumper extends FileDumper
 {
-    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = array())
+    public function formatCatalogue(MessageCatalogue $messages, $domain, array $options = [])
     {
         return http_build_query($messages->all($domain), '', '&');
     }
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
index 78d0abb6e4..dcb9c2c38f 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/IcuResFileDumperTest.php
@@ -20,7 +20,7 @@ class IcuResFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new IcuResFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
index 5f3c1236c7..1ed168bdc3 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/IniFileDumperTest.php
@@ -20,7 +20,7 @@ class IniFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new IniFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
index b134ce4f23..04e3d86bec 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/JsonFileDumperTest.php
@@ -20,7 +20,7 @@ class JsonFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new JsonFileDumper();
 
@@ -30,10 +30,10 @@ class JsonFileDumperTest extends TestCase
     public function testDumpWithCustomEncoding()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => '"bar"'));
+        $catalogue->add(['foo' => '"bar"']);
 
         $dumper = new JsonFileDumper();
 
-        $this->assertStringEqualsFile(__DIR__.'/../fixtures/resources.dump.json', $dumper->formatCatalogue($catalogue, 'messages', array('json_encoding' => JSON_HEX_QUOT)));
+        $this->assertStringEqualsFile(__DIR__.'/../fixtures/resources.dump.json', $dumper->formatCatalogue($catalogue, 'messages', ['json_encoding' => JSON_HEX_QUOT]));
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
index d0519675bc..fbbd75dc3b 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/MoFileDumperTest.php
@@ -20,7 +20,7 @@ class MoFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new MoFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
index 22a39dd43d..00e535da39 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/PhpFileDumperTest.php
@@ -20,7 +20,7 @@ class PhpFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new PhpFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
index 5d75247103..d694a6dd3f 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/PoFileDumperTest.php
@@ -20,7 +20,7 @@ class PoFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new PoFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
index 8e4a6f43fc..edfad6005c 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/QtFileDumperTest.php
@@ -20,7 +20,7 @@ class QtFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->add(array('foo' => 'bar'), 'resources');
+        $catalogue->add(['foo' => 'bar'], 'resources');
 
         $dumper = new QtFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
index 443dccf2bc..c634a27936 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/XliffFileDumperTest.php
@@ -20,49 +20,49 @@ class XliffFileDumperTest extends TestCase
     public function testFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en_US');
-        $catalogue->add(array(
+        $catalogue->add([
             'foo' => 'bar',
             'key' => '',
             'key.with.cdata' => '<source> & <target>',
-        ));
-        $catalogue->setMetadata('foo', array('notes' => array(array('priority' => 1, 'from' => 'bar', 'content' => 'baz'))));
-        $catalogue->setMetadata('key', array('notes' => array(array('content' => 'baz'), array('content' => 'qux'))));
+        ]);
+        $catalogue->setMetadata('foo', ['notes' => [['priority' => 1, 'from' => 'bar', 'content' => 'baz']]]);
+        $catalogue->setMetadata('key', ['notes' => [['content' => 'baz'], ['content' => 'qux']]]);
 
         $dumper = new XliffFileDumper();
 
         $this->assertStringEqualsFile(
             __DIR__.'/../fixtures/resources-clean.xlf',
-            $dumper->formatCatalogue($catalogue, 'messages', array('default_locale' => 'fr_FR'))
+            $dumper->formatCatalogue($catalogue, 'messages', ['default_locale' => 'fr_FR'])
         );
     }
 
     public function testFormatCatalogueXliff2()
     {
         $catalogue = new MessageCatalogue('en_US');
-        $catalogue->add(array(
+        $catalogue->add([
             'foo' => 'bar',
             'key' => '',
             'key.with.cdata' => '<source> & <target>',
-        ));
-        $catalogue->setMetadata('key', array('target-attributes' => array('order' => 1)));
+        ]);
+        $catalogue->setMetadata('key', ['target-attributes' => ['order' => 1]]);
 
         $dumper = new XliffFileDumper();
 
         $this->assertStringEqualsFile(
             __DIR__.'/../fixtures/resources-2.0-clean.xlf',
-            $dumper->formatCatalogue($catalogue, 'messages', array('default_locale' => 'fr_FR', 'xliff_version' => '2.0'))
+            $dumper->formatCatalogue($catalogue, 'messages', ['default_locale' => 'fr_FR', 'xliff_version' => '2.0'])
         );
     }
 
     public function testFormatCatalogueWithCustomToolInfo()
     {
-        $options = array(
+        $options = [
             'default_locale' => 'en_US',
-            'tool_info' => array('tool-id' => 'foo', 'tool-name' => 'foo', 'tool-version' => '0.0', 'tool-company' => 'Foo'),
-        );
+            'tool_info' => ['tool-id' => 'foo', 'tool-name' => 'foo', 'tool-version' => '0.0', 'tool-company' => 'Foo'],
+        ];
 
         $catalogue = new MessageCatalogue('en_US');
-        $catalogue->add(array('foo' => 'bar'));
+        $catalogue->add(['foo' => 'bar']);
 
         $dumper = new XliffFileDumper();
 
@@ -75,41 +75,41 @@ class XliffFileDumperTest extends TestCase
     public function testFormatCatalogueWithTargetAttributesMetadata()
     {
         $catalogue = new MessageCatalogue('en_US');
-        $catalogue->add(array(
+        $catalogue->add([
             'foo' => 'bar',
-        ));
-        $catalogue->setMetadata('foo', array('target-attributes' => array('state' => 'needs-translation')));
+        ]);
+        $catalogue->setMetadata('foo', ['target-attributes' => ['state' => 'needs-translation']]);
 
         $dumper = new XliffFileDumper();
 
         $this->assertStringEqualsFile(
             __DIR__.'/../fixtures/resources-target-attributes.xlf',
-            $dumper->formatCatalogue($catalogue, 'messages', array('default_locale' => 'fr_FR'))
+            $dumper->formatCatalogue($catalogue, 'messages', ['default_locale' => 'fr_FR'])
         );
     }
 
     public function testFormatCatalogueWithNotesMetadata()
     {
         $catalogue = new MessageCatalogue('en_US');
-        $catalogue->add(array(
+        $catalogue->add([
             'foo' => 'bar',
             'baz' => 'biz',
-        ));
-        $catalogue->setMetadata('foo', array('notes' => array(
-            array('category' => 'state', 'content' => 'new'),
-            array('category' => 'approved', 'content' => 'true'),
-            array('category' => 'section', 'content' => 'user login', 'priority' => '1'),
-        )));
-        $catalogue->setMetadata('baz', array('notes' => array(
-            array('id' => 'x', 'content' => 'x_content'),
-            array('appliesTo' => 'target', 'category' => 'quality', 'content' => 'Fuzzy'),
-        )));
+        ]);
+        $catalogue->setMetadata('foo', ['notes' => [
+            ['category' => 'state', 'content' => 'new'],
+            ['category' => 'approved', 'content' => 'true'],
+            ['category' => 'section', 'content' => 'user login', 'priority' => '1'],
+        ]]);
+        $catalogue->setMetadata('baz', ['notes' => [
+            ['id' => 'x', 'content' => 'x_content'],
+            ['appliesTo' => 'target', 'category' => 'quality', 'content' => 'Fuzzy'],
+        ]]);
 
         $dumper = new XliffFileDumper();
 
         $this->assertStringEqualsFile(
             __DIR__.'/../fixtures/resources-notes-meta.xlf',
-            $dumper->formatCatalogue($catalogue, 'messages', array('default_locale' => 'fr_FR', 'xliff_version' => '2.0'))
+            $dumper->formatCatalogue($catalogue, 'messages', ['default_locale' => 'fr_FR', 'xliff_version' => '2.0'])
         );
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php b/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
index a5549a2e93..24bc65ba24 100644
--- a/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
+++ b/src/Symfony/Component/Translation/Tests/Dumper/YamlFileDumperTest.php
@@ -21,24 +21,24 @@ class YamlFileDumperTest extends TestCase
     {
         $catalogue = new MessageCatalogue('en');
         $catalogue->add(
-            array(
+            [
                 'foo.bar1' => 'value1',
                 'foo.bar2' => 'value2',
-            ));
+            ]);
 
         $dumper = new YamlFileDumper();
 
-        $this->assertStringEqualsFile(__DIR__.'/../fixtures/messages.yml', $dumper->formatCatalogue($catalogue, 'messages', array('as_tree' => true, 'inline' => 999)));
+        $this->assertStringEqualsFile(__DIR__.'/../fixtures/messages.yml', $dumper->formatCatalogue($catalogue, 'messages', ['as_tree' => true, 'inline' => 999]));
     }
 
     public function testLinearFormatCatalogue()
     {
         $catalogue = new MessageCatalogue('en');
         $catalogue->add(
-            array(
+            [
                 'foo.bar1' => 'value1',
                 'foo.bar2' => 'value2',
-            ));
+            ]);
 
         $dumper = new YamlFileDumper();
 
diff --git a/src/Symfony/Component/Translation/Tests/Extractor/PhpExtractorTest.php b/src/Symfony/Component/Translation/Tests/Extractor/PhpExtractorTest.php
index 3487dd6248..f6a17d00c0 100644
--- a/src/Symfony/Component/Translation/Tests/Extractor/PhpExtractorTest.php
+++ b/src/Symfony/Component/Translation/Tests/Extractor/PhpExtractorTest.php
@@ -39,8 +39,8 @@ EOF;
 nowdoc key with whitespace and nonescaped \$\n sequences
 EOF;
         // Assert
-        $expectedCatalogue = array(
-            'messages' => array(
+        $expectedCatalogue = [
+            'messages' => [
                 'single-quoted key' => 'prefixsingle-quoted key',
                 'double-quoted key' => 'prefixdouble-quoted key',
                 'heredoc key' => 'prefixheredoc key',
@@ -51,8 +51,8 @@ EOF;
                 $expectedHeredoc => 'prefix'.$expectedHeredoc,
                 $expectedNowdoc => 'prefix'.$expectedNowdoc,
                 '{0} There is no apples|{1} There is one apple|]1,Inf[ There are %count% apples' => 'prefix{0} There is no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
-            ),
-            'not_messages' => array(
+            ],
+            'not_messages' => [
                 'other-domain-test-no-params-short-array' => 'prefixother-domain-test-no-params-short-array',
                 'other-domain-test-no-params-long-array' => 'prefixother-domain-test-no-params-long-array',
                 'other-domain-test-params-short-array' => 'prefixother-domain-test-params-short-array',
@@ -62,8 +62,8 @@ EOF;
                 'typecast' => 'prefixtypecast',
                 'msg1' => 'prefixmsg1',
                 'msg2' => 'prefixmsg2',
-            ),
-        );
+            ],
+        ];
         $actualCatalogue = $catalogue->all();
 
         $this->assertEquals($expectedCatalogue, $actualCatalogue);
@@ -72,7 +72,7 @@ EOF;
     public function resourcesProvider()
     {
         $directory = __DIR__.'/../fixtures/extractor/';
-        $splFiles = array();
+        $splFiles = [];
         foreach (new \DirectoryIterator($directory) as $fileInfo) {
             if ($fileInfo->isDot()) {
                 continue;
@@ -83,13 +83,13 @@ EOF;
             $splFiles[] = $fileInfo->getFileInfo();
         }
 
-        return array(
-            array($directory),
-            array($phpFile),
-            array(glob($directory.'*')),
-            array($splFiles),
-            array(new \ArrayObject(glob($directory.'*'))),
-            array(new \ArrayObject($splFiles)),
-        );
+        return [
+            [$directory],
+            [$phpFile],
+            [glob($directory.'*')],
+            [$splFiles],
+            [new \ArrayObject(glob($directory.'*'))],
+            [new \ArrayObject($splFiles)],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Formatter/IntlFormatterTest.php b/src/Symfony/Component/Translation/Tests/Formatter/IntlFormatterTest.php
index 89eaa18f32..45ce6d4f6e 100644
--- a/src/Symfony/Component/Translation/Tests/Formatter/IntlFormatterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Formatter/IntlFormatterTest.php
@@ -31,7 +31,7 @@ class IntlFormatterTest extends \PHPUnit\Framework\TestCase
     public function testInvalidFormat()
     {
         $this->expectException(InvalidArgumentException::class);
-        (new IntlFormatter())->formatIntl('{foo', 'en', array(2));
+        (new IntlFormatter())->formatIntl('{foo', 'en', [2]);
     }
 
     public function testFormatWithNamedArguments()
@@ -59,38 +59,38 @@ class IntlFormatterTest extends \PHPUnit\Framework\TestCase
      other {{host} invites {guest} as one of the # people invited to their party.}}}}
 _MSG_;
 
-        $message = (new IntlFormatter())->formatIntl($chooseMessage, 'en', array(
+        $message = (new IntlFormatter())->formatIntl($chooseMessage, 'en', [
             'gender_of_host' => 'male',
             'num_guests' => 10,
             'host' => 'Fabien',
             'guest' => 'Guilherme',
-        ));
+        ]);
 
         $this->assertEquals('Fabien invites Guilherme as one of the 9 people invited to his party.', $message);
     }
 
     public function provideDataForFormat()
     {
-        return array(
-            array(
+        return [
+            [
                 'There is one apple',
                 'There is one apple',
-                array(),
-            ),
-            array(
+                [],
+            ],
+            [
                 '4,560 monkeys on 123 trees make 37.073 monkeys per tree',
                 '{0,number,integer} monkeys on {1,number,integer} trees make {2,number} monkeys per tree',
-                array(4560, 123, 4560 / 123),
-            ),
-        );
+                [4560, 123, 4560 / 123],
+            ],
+        ];
     }
 
     public function testPercentsAndBracketsAreTrimmed()
     {
         $formatter = new IntlFormatter();
         $this->assertInstanceof(IntlFormatterInterface::class, $formatter);
-        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', array('name' => 'Fab')));
-        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', array('%name%' => 'Fab')));
-        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', array('{{ name }}' => 'Fab')));
+        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', ['name' => 'Fab']));
+        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', ['%name%' => 'Fab']));
+        $this->assertSame('Hello Fab', $formatter->formatIntl('Hello {name}', 'en', ['{{ name }}' => 'Fab']));
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Formatter/MessageFormatterTest.php b/src/Symfony/Component/Translation/Tests/Formatter/MessageFormatterTest.php
index f4c96aa12f..232bcf9043 100644
--- a/src/Symfony/Component/Translation/Tests/Formatter/MessageFormatterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Formatter/MessageFormatterTest.php
@@ -19,7 +19,7 @@ class MessageFormatterTest extends TestCase
     /**
      * @dataProvider getTransMessages
      */
-    public function testFormat($expected, $message, $parameters = array())
+    public function testFormat($expected, $message, $parameters = [])
     {
         $this->assertEquals($expected, $this->getMessageFormatter()->format($message, 'en', $parameters));
     }
@@ -35,45 +35,45 @@ class MessageFormatterTest extends TestCase
 
     public function getTransMessages()
     {
-        return array(
-            array(
+        return [
+            [
                 'There is one apple',
                 'There is one apple',
-            ),
-            array(
+            ],
+            [
                 'There are 5 apples',
                 'There are %count% apples',
-                array('%count%' => 5),
-            ),
-            array(
+                ['%count%' => 5],
+            ],
+            [
                 'There are 5 apples',
                 'There are {{count}} apples',
-                array('{{count}}' => 5),
-            ),
-        );
+                ['{{count}}' => 5],
+            ],
+        ];
     }
 
     public function getTransChoiceMessages()
     {
-        return array(
-            array('Il y a 0 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, array('%count%' => 0)),
-            array('Il y a 1 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 1, array('%count%' => 1)),
-            array('Il y a 10 pommes', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 10, array('%count%' => 10)),
+        return [
+            ['Il y a 0 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, ['%count%' => 0]],
+            ['Il y a 1 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 1, ['%count%' => 1]],
+            ['Il y a 10 pommes', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 10, ['%count%' => 10]],
 
-            array('Il y a 0 pomme', 'Il y a %count% pomme|Il y a %count% pommes', 0, array('%count%' => 0)),
-            array('Il y a 1 pomme', 'Il y a %count% pomme|Il y a %count% pommes', 1, array('%count%' => 1)),
-            array('Il y a 10 pommes', 'Il y a %count% pomme|Il y a %count% pommes', 10, array('%count%' => 10)),
+            ['Il y a 0 pomme', 'Il y a %count% pomme|Il y a %count% pommes', 0, ['%count%' => 0]],
+            ['Il y a 1 pomme', 'Il y a %count% pomme|Il y a %count% pommes', 1, ['%count%' => 1]],
+            ['Il y a 10 pommes', 'Il y a %count% pomme|Il y a %count% pommes', 10, ['%count%' => 10]],
 
-            array('Il y a 0 pomme', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 0, array('%count%' => 0)),
-            array('Il y a 1 pomme', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 1, array('%count%' => 1)),
-            array('Il y a 10 pommes', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 10, array('%count%' => 10)),
+            ['Il y a 0 pomme', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 0, ['%count%' => 0]],
+            ['Il y a 1 pomme', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 1, ['%count%' => 1]],
+            ['Il y a 10 pommes', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 10, ['%count%' => 10]],
 
-            array('Il n\'y a aucune pomme', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 0, array('%count%' => 0)),
-            array('Il y a 1 pomme', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 1, array('%count%' => 1)),
-            array('Il y a 10 pommes', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 10, array('%count%' => 10)),
+            ['Il n\'y a aucune pomme', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 0, ['%count%' => 0]],
+            ['Il y a 1 pomme', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 1, ['%count%' => 1]],
+            ['Il y a 10 pommes', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 10, ['%count%' => 10]],
 
-            array('Il y a 0 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, array('%count%' => 0)),
-        );
+            ['Il y a 0 pomme', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, ['%count%' => 0]],
+        ];
     }
 
     private function getMessageFormatter()
diff --git a/src/Symfony/Component/Translation/Tests/IntervalTest.php b/src/Symfony/Component/Translation/Tests/IntervalTest.php
index a8dd18caa2..bfd90a2867 100644
--- a/src/Symfony/Component/Translation/Tests/IntervalTest.php
+++ b/src/Symfony/Component/Translation/Tests/IntervalTest.php
@@ -37,16 +37,16 @@ class IntervalTest extends TestCase
 
     public function getTests()
     {
-        return array(
-            array(true, 3, '{1,2, 3 ,4}'),
-            array(false, 10, '{1,2, 3 ,4}'),
-            array(false, 3, '[1,2]'),
-            array(true, 1, '[1,2]'),
-            array(true, 2, '[1,2]'),
-            array(false, 1, ']1,2['),
-            array(false, 2, ']1,2['),
-            array(true, log(0), '[-Inf,2['),
-            array(true, -log(0), '[-2,+Inf]'),
-        );
+        return [
+            [true, 3, '{1,2, 3 ,4}'],
+            [false, 10, '{1,2, 3 ,4}'],
+            [false, 3, '[1,2]'],
+            [true, 1, '[1,2]'],
+            [true, 2, '[1,2]'],
+            [false, 1, ']1,2['],
+            [false, 2, ']1,2['],
+            [true, log(0), '[-Inf,2['],
+            [true, -log(0), '[-2,+Inf]'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
index 29efdef00d..4fd5752db2 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/CsvFileLoaderTest.php
@@ -23,9 +23,9 @@ class CsvFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.csv';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadDoesNothingIfEmpty()
@@ -34,9 +34,9 @@ class CsvFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty.csv';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array(), $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/IcuDatFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/IcuDatFileLoaderTest.php
index e28db60135..601680af8a 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/IcuDatFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/IcuDatFileLoaderTest.php
@@ -37,9 +37,9 @@ class IcuDatFileLoaderTest extends LocalizedTestCase
         $resource = __DIR__.'/../fixtures/resourcebundle/dat/resources';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('symfony' => 'Symfony 2 is great'), $catalogue->all('domain1'));
+        $this->assertEquals(['symfony' => 'Symfony 2 is great'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource.'.dat')), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource.'.dat')], $catalogue->getResources());
     }
 
     public function testDatFrenchLoad()
@@ -48,9 +48,9 @@ class IcuDatFileLoaderTest extends LocalizedTestCase
         $resource = __DIR__.'/../fixtures/resourcebundle/dat/resources';
         $catalogue = $loader->load($resource, 'fr', 'domain1');
 
-        $this->assertEquals(array('symfony' => 'Symfony 2 est génial'), $catalogue->all('domain1'));
+        $this->assertEquals(['symfony' => 'Symfony 2 est génial'], $catalogue->all('domain1'));
         $this->assertEquals('fr', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource.'.dat')), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource.'.dat')], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/IcuResFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/IcuResFileLoaderTest.php
index 92d8933c8e..962c3af2ef 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/IcuResFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/IcuResFileLoaderTest.php
@@ -26,9 +26,9 @@ class IcuResFileLoaderTest extends LocalizedTestCase
         $resource = __DIR__.'/../fixtures/resourcebundle/res';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new DirectoryResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new DirectoryResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
index d9dcc5e8f0..e0d8b2f4c4 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/IniFileLoaderTest.php
@@ -23,9 +23,9 @@ class IniFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.ini';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadDoesNothingIfEmpty()
@@ -34,9 +34,9 @@ class IniFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty.ini';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array(), $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
index cea0aef4bb..4c507da5ab 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/JsonFileLoaderTest.php
@@ -23,9 +23,9 @@ class JsonFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.json';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadDoesNothingIfEmpty()
@@ -34,9 +34,9 @@ class JsonFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty.json';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array(), $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
index 6ad3d44d21..63de5cebaa 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/MoFileLoaderTest.php
@@ -23,9 +23,9 @@ class MoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.mo';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadPlurals()
@@ -34,9 +34,9 @@ class MoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/plurals.mo';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar', 'foos' => '{0} bar|{1} bars'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar', 'foos' => '{0} bar|{1} bars'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
@@ -65,8 +65,8 @@ class MoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty-translation.mo';
         $catalogue = $loader->load($resource, 'en', 'message');
 
-        $this->assertEquals(array(), $catalogue->all('message'));
+        $this->assertEquals([], $catalogue->all('message'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
index 01b7a5feab..68cb2d0b72 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/PhpFileLoaderTest.php
@@ -23,9 +23,9 @@ class PhpFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.php';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
index 4176cb7ffc..4bf2ee6545 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/PoFileLoaderTest.php
@@ -23,9 +23,9 @@ class PoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.po';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadPlurals()
@@ -34,9 +34,9 @@ class PoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/plurals.po';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar', 'foos' => 'bar|bars'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar', 'foos' => 'bar|bars'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadDoesNothingIfEmpty()
@@ -45,9 +45,9 @@ class PoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty.po';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array(), $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
@@ -66,9 +66,9 @@ class PoFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty-translation.po';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => ''), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => ''], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testEscapedId()
diff --git a/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
index 8a00fdedcf..08f55e9022 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/QtFileLoaderTest.php
@@ -23,9 +23,9 @@ class QtFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.ts';
         $catalogue = $loader->load($resource, 'en', 'resources');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('resources'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('resources'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
index bb3c1a99a7..a535db56fc 100644
--- a/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Translation/Tests/Loader/YamlFileLoaderTest.php
@@ -23,9 +23,9 @@ class YamlFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/resources.yml';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     public function testLoadDoesNothingIfEmpty()
@@ -34,9 +34,9 @@ class YamlFileLoaderTest extends TestCase
         $resource = __DIR__.'/../fixtures/empty.yml';
         $catalogue = $loader->load($resource, 'en', 'domain1');
 
-        $this->assertEquals(array(), $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain1'));
         $this->assertEquals('en', $catalogue->getLocale());
-        $this->assertEquals(array(new FileResource($resource)), $catalogue->getResources());
+        $this->assertEquals([new FileResource($resource)], $catalogue->getResources());
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php b/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
index 0e43cbecf4..450e060aab 100644
--- a/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/LoggingTranslatorTest.php
@@ -43,11 +43,11 @@ class LoggingTranslatorTest extends TestCase
         ;
 
         $translator = new Translator('ar');
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('some_message2' => 'one thing|%count% things'), 'en');
+        $translator->addResource('array', ['some_message2' => 'one thing|%count% things'], 'en');
         $loggableTranslator = new LoggingTranslator($translator, $logger);
-        $loggableTranslator->transChoice('some_message2', 10, array('%count%' => 10));
+        $loggableTranslator->transChoice('some_message2', 10, ['%count%' => 10]);
     }
 
     /**
@@ -63,6 +63,6 @@ class LoggingTranslatorTest extends TestCase
 
         $translator = new Translator('ar');
         $loggableTranslator = new LoggingTranslator($translator, $logger);
-        $loggableTranslator->transChoice('some_message2', 10, array('%count%' => 10));
+        $loggableTranslator->transChoice('some_message2', 10, ['%count%' => 10]);
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php b/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
index 3339f3db20..6fe9368f5c 100644
--- a/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
+++ b/src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php
@@ -25,40 +25,40 @@ class MessageCatalogueTest extends TestCase
 
     public function testGetDomains()
     {
-        $catalogue = new MessageCatalogue('en', array('domain1' => array(), 'domain2' => array(), 'domain2+intl-icu' => array(), 'domain3+intl-icu' => array()));
+        $catalogue = new MessageCatalogue('en', ['domain1' => [], 'domain2' => [], 'domain2+intl-icu' => [], 'domain3+intl-icu' => []]);
 
-        $this->assertEquals(array('domain1', 'domain2', 'domain3'), $catalogue->getDomains());
+        $this->assertEquals(['domain1', 'domain2', 'domain3'], $catalogue->getDomains());
     }
 
     public function testAll()
     {
-        $catalogue = new MessageCatalogue('en', $messages = array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar')));
+        $catalogue = new MessageCatalogue('en', $messages = ['domain1' => ['foo' => 'foo'], 'domain2' => ['bar' => 'bar']]);
 
-        $this->assertEquals(array('foo' => 'foo'), $catalogue->all('domain1'));
-        $this->assertEquals(array(), $catalogue->all('domain88'));
+        $this->assertEquals(['foo' => 'foo'], $catalogue->all('domain1'));
+        $this->assertEquals([], $catalogue->all('domain88'));
         $this->assertEquals($messages, $catalogue->all());
 
-        $messages = array('domain1+intl-icu' => array('foo' => 'bar')) + $messages + array(
-            'domain2+intl-icu' => array('bar' => 'foo'),
-            'domain3+intl-icu' => array('biz' => 'biz'),
-        );
+        $messages = ['domain1+intl-icu' => ['foo' => 'bar']] + $messages + [
+            'domain2+intl-icu' => ['bar' => 'foo'],
+            'domain3+intl-icu' => ['biz' => 'biz'],
+        ];
         $catalogue = new MessageCatalogue('en', $messages);
 
-        $this->assertEquals(array('foo' => 'bar'), $catalogue->all('domain1'));
-        $this->assertEquals(array('bar' => 'foo'), $catalogue->all('domain2'));
-        $this->assertEquals(array('biz' => 'biz'), $catalogue->all('domain3'));
+        $this->assertEquals(['foo' => 'bar'], $catalogue->all('domain1'));
+        $this->assertEquals(['bar' => 'foo'], $catalogue->all('domain2'));
+        $this->assertEquals(['biz' => 'biz'], $catalogue->all('domain3'));
 
-        $messages = array(
-            'domain1' => array('foo' => 'bar'),
-            'domain2' => array('bar' => 'foo'),
-            'domain3' => array('biz' => 'biz'),
-        );
+        $messages = [
+            'domain1' => ['foo' => 'bar'],
+            'domain2' => ['bar' => 'foo'],
+            'domain3' => ['biz' => 'biz'],
+        ];
         $this->assertEquals($messages, $catalogue->all());
     }
 
     public function testHas()
     {
-        $catalogue = new MessageCatalogue('en', array('domain1' => array('foo' => 'foo'), 'domain2+intl-icu' => array('bar' => 'bar')));
+        $catalogue = new MessageCatalogue('en', ['domain1' => ['foo' => 'foo'], 'domain2+intl-icu' => ['bar' => 'bar']]);
 
         $this->assertTrue($catalogue->has('foo', 'domain1'));
         $this->assertTrue($catalogue->has('bar', 'domain2'));
@@ -68,7 +68,7 @@ class MessageCatalogueTest extends TestCase
 
     public function testGetSet()
     {
-        $catalogue = new MessageCatalogue('en', array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar'), 'domain2+intl-icu' => array('bar' => 'foo')));
+        $catalogue = new MessageCatalogue('en', ['domain1' => ['foo' => 'foo'], 'domain2' => ['bar' => 'bar'], 'domain2+intl-icu' => ['bar' => 'foo']]);
         $catalogue->set('foo1', 'foo1', 'domain1');
 
         $this->assertEquals('foo', $catalogue->get('foo', 'domain1'));
@@ -78,24 +78,24 @@ class MessageCatalogueTest extends TestCase
 
     public function testAdd()
     {
-        $catalogue = new MessageCatalogue('en', array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar')));
-        $catalogue->add(array('foo1' => 'foo1'), 'domain1');
+        $catalogue = new MessageCatalogue('en', ['domain1' => ['foo' => 'foo'], 'domain2' => ['bar' => 'bar']]);
+        $catalogue->add(['foo1' => 'foo1'], 'domain1');
 
         $this->assertEquals('foo', $catalogue->get('foo', 'domain1'));
         $this->assertEquals('foo1', $catalogue->get('foo1', 'domain1'));
 
-        $catalogue->add(array('foo' => 'bar'), 'domain1');
+        $catalogue->add(['foo' => 'bar'], 'domain1');
         $this->assertEquals('bar', $catalogue->get('foo', 'domain1'));
         $this->assertEquals('foo1', $catalogue->get('foo1', 'domain1'));
 
-        $catalogue->add(array('foo' => 'bar'), 'domain88');
+        $catalogue->add(['foo' => 'bar'], 'domain88');
         $this->assertEquals('bar', $catalogue->get('foo', 'domain88'));
     }
 
     public function testReplace()
     {
-        $catalogue = new MessageCatalogue('en', array('domain1' => array('foo' => 'foo'), 'domain1+intl-icu' => array('bar' => 'bar')));
-        $catalogue->replace($messages = array('foo1' => 'foo1'), 'domain1');
+        $catalogue = new MessageCatalogue('en', ['domain1' => ['foo' => 'foo'], 'domain1+intl-icu' => ['bar' => 'bar']]);
+        $catalogue->replace($messages = ['foo1' => 'foo1'], 'domain1');
 
         $this->assertEquals($messages, $catalogue->all('domain1'));
     }
@@ -108,10 +108,10 @@ class MessageCatalogueTest extends TestCase
         $r1 = $this->getMockBuilder('Symfony\Component\Config\Resource\ResourceInterface')->getMock();
         $r1->expects($this->any())->method('__toString')->will($this->returnValue('r1'));
 
-        $catalogue = new MessageCatalogue('en', array('domain1' => array('foo' => 'foo')));
+        $catalogue = new MessageCatalogue('en', ['domain1' => ['foo' => 'foo']]);
         $catalogue->addResource($r);
 
-        $catalogue1 = new MessageCatalogue('en', array('domain1' => array('foo1' => 'foo1'), 'domain2+intl-icu' => array('bar' => 'bar')));
+        $catalogue1 = new MessageCatalogue('en', ['domain1' => ['foo1' => 'foo1'], 'domain2+intl-icu' => ['bar' => 'bar']]);
         $catalogue1->addResource($r1);
 
         $catalogue->addCatalogue($catalogue1);
@@ -121,7 +121,7 @@ class MessageCatalogueTest extends TestCase
         $this->assertEquals('bar', $catalogue->get('bar', 'domain2'));
         $this->assertEquals('bar', $catalogue->get('bar', 'domain2+intl-icu'));
 
-        $this->assertEquals(array($r, $r1), $catalogue->getResources());
+        $this->assertEquals([$r, $r1], $catalogue->getResources());
     }
 
     public function testAddFallbackCatalogue()
@@ -135,10 +135,10 @@ class MessageCatalogueTest extends TestCase
         $r2 = $this->getMockBuilder('Symfony\Component\Config\Resource\ResourceInterface')->getMock();
         $r2->expects($this->any())->method('__toString')->will($this->returnValue('r2'));
 
-        $catalogue = new MessageCatalogue('fr_FR', array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar')));
+        $catalogue = new MessageCatalogue('fr_FR', ['domain1' => ['foo' => 'foo'], 'domain2' => ['bar' => 'bar']]);
         $catalogue->addResource($r);
 
-        $catalogue1 = new MessageCatalogue('fr', array('domain1' => array('foo' => 'bar', 'foo1' => 'foo1')));
+        $catalogue1 = new MessageCatalogue('fr', ['domain1' => ['foo' => 'bar', 'foo1' => 'foo1']]);
         $catalogue1->addResource($r1);
 
         $catalogue2 = new MessageCatalogue('en');
@@ -150,7 +150,7 @@ class MessageCatalogueTest extends TestCase
         $this->assertEquals('foo', $catalogue->get('foo', 'domain1'));
         $this->assertEquals('foo1', $catalogue->get('foo1', 'domain1'));
 
-        $this->assertEquals(array($r, $r1, $r2), $catalogue->getResources());
+        $this->assertEquals([$r, $r1, $r2], $catalogue->getResources());
     }
 
     /**
@@ -185,7 +185,7 @@ class MessageCatalogueTest extends TestCase
     public function testAddCatalogueWhenLocaleIsNotTheSameAsTheCurrentOne()
     {
         $catalogue = new MessageCatalogue('en');
-        $catalogue->addCatalogue(new MessageCatalogue('fr', array()));
+        $catalogue->addCatalogue(new MessageCatalogue('fr', []));
     }
 
     public function testGetAddResource()
@@ -199,13 +199,13 @@ class MessageCatalogueTest extends TestCase
         $r1->expects($this->any())->method('__toString')->will($this->returnValue('r1'));
         $catalogue->addResource($r1);
 
-        $this->assertEquals(array($r, $r1), $catalogue->getResources());
+        $this->assertEquals([$r, $r1], $catalogue->getResources());
     }
 
     public function testMetadataDelete()
     {
         $catalogue = new MessageCatalogue('en');
-        $this->assertEquals(array(), $catalogue->getMetadata('', ''), 'Metadata is empty');
+        $this->assertEquals([], $catalogue->getMetadata('', ''), 'Metadata is empty');
         $catalogue->deleteMetadata('key', 'messages');
         $catalogue->deleteMetadata('', 'messages');
         $catalogue->deleteMetadata();
@@ -217,8 +217,8 @@ class MessageCatalogueTest extends TestCase
         $catalogue->setMetadata('key', 'value');
         $this->assertEquals('value', $catalogue->getMetadata('key', 'messages'), "Metadata 'key' = 'value'");
 
-        $catalogue->setMetadata('key2', array());
-        $this->assertEquals(array(), $catalogue->getMetadata('key2', 'messages'), 'Metadata key2 is array');
+        $catalogue->setMetadata('key2', []);
+        $this->assertEquals([], $catalogue->getMetadata('key2', 'messages'), 'Metadata key2 is array');
 
         $catalogue->deleteMetadata('key2', 'messages');
         $this->assertNull($catalogue->getMetadata('key2', 'messages'), 'Metadata key2 should is deleted.');
@@ -231,13 +231,13 @@ class MessageCatalogueTest extends TestCase
     {
         $cat1 = new MessageCatalogue('en');
         $cat1->setMetadata('a', 'b');
-        $this->assertEquals(array('messages' => array('a' => 'b')), $cat1->getMetadata('', ''), 'Cat1 contains messages metadata.');
+        $this->assertEquals(['messages' => ['a' => 'b']], $cat1->getMetadata('', ''), 'Cat1 contains messages metadata.');
 
         $cat2 = new MessageCatalogue('en');
         $cat2->setMetadata('b', 'c', 'domain');
-        $this->assertEquals(array('domain' => array('b' => 'c')), $cat2->getMetadata('', ''), 'Cat2 contains domain metadata.');
+        $this->assertEquals(['domain' => ['b' => 'c']], $cat2->getMetadata('', ''), 'Cat2 contains domain metadata.');
 
         $cat1->addCatalogue($cat2);
-        $this->assertEquals(array('messages' => array('a' => 'b'), 'domain' => array('b' => 'c')), $cat1->getMetadata('', ''), 'Cat1 contains merged metadata.');
+        $this->assertEquals(['messages' => ['a' => 'b'], 'domain' => ['b' => 'c']], $cat1->getMetadata('', ''), 'Cat1 contains merged metadata.');
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php b/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
index 5f85c5b235..f099716176 100644
--- a/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
+++ b/src/Symfony/Component/Translation/Tests/MessageSelectorTest.php
@@ -49,92 +49,92 @@ class MessageSelectorTest extends TestCase
 
     public function getNonMatchingMessages()
     {
-        return array(
-            array('{0} There are no apples|{1} There is one apple', 2),
-            array('{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('{1} There is one apple|]2,Inf] There are %count% apples', 2),
-            array('{0} There are no apples|There is one apple', 2),
-        );
+        return [
+            ['{0} There are no apples|{1} There is one apple', 2],
+            ['{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['{1} There is one apple|]2,Inf] There are %count% apples', 2],
+            ['{0} There are no apples|There is one apple', 2],
+        ];
     }
 
     public function getChooseTests()
     {
-        return array(
-            array('There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('There are no apples', '{0}     There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('There are no apples', '{0}There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
+        return [
+            ['There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['There are no apples', '{0}     There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['There are no apples', '{0}There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
 
-            array('There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1),
+            ['There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1],
 
-            array('There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10),
-            array('There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf]There are %count% apples', 10),
-            array('There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf]     There are %count% apples', 10),
+            ['There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10],
+            ['There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf]There are %count% apples', 10],
+            ['There are %count% apples', '{0} There are no apples|{1} There is one apple|]1,Inf]     There are %count% apples', 10],
 
-            array('There are %count% apples', 'There is one apple|There are %count% apples', 0),
-            array('There is one apple', 'There is one apple|There are %count% apples', 1),
-            array('There are %count% apples', 'There is one apple|There are %count% apples', 10),
+            ['There are %count% apples', 'There is one apple|There are %count% apples', 0],
+            ['There is one apple', 'There is one apple|There are %count% apples', 1],
+            ['There are %count% apples', 'There is one apple|There are %count% apples', 10],
 
-            array('There are %count% apples', 'one: There is one apple|more: There are %count% apples', 0),
-            array('There is one apple', 'one: There is one apple|more: There are %count% apples', 1),
-            array('There are %count% apples', 'one: There is one apple|more: There are %count% apples', 10),
+            ['There are %count% apples', 'one: There is one apple|more: There are %count% apples', 0],
+            ['There is one apple', 'one: There is one apple|more: There are %count% apples', 1],
+            ['There are %count% apples', 'one: There is one apple|more: There are %count% apples', 10],
 
-            array('There are no apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 0),
-            array('There is one apple', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 1),
-            array('There are %count% apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 10),
+            ['There are no apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 0],
+            ['There is one apple', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 1],
+            ['There are %count% apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 10],
 
-            array('', '{0}|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('', '{0} There are no apples|{1}|]1,Inf] There are %count% apples', 1),
+            ['', '{0}|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['', '{0} There are no apples|{1}|]1,Inf] There are %count% apples', 1],
 
             // Indexed only tests which are Gettext PoFile* compatible strings.
-            array('There are %count% apples', 'There is one apple|There are %count% apples', 0),
-            array('There is one apple', 'There is one apple|There are %count% apples', 1),
-            array('There are %count% apples', 'There is one apple|There are %count% apples', 2),
+            ['There are %count% apples', 'There is one apple|There are %count% apples', 0],
+            ['There is one apple', 'There is one apple|There are %count% apples', 1],
+            ['There are %count% apples', 'There is one apple|There are %count% apples', 2],
 
             // Tests for float numbers
-            array('There is almost one apple', '{0} There are no apples|]0,1[ There is almost one apple|{1} There is one apple|[1,Inf] There is more than one apple', 0.7),
-            array('There is one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1),
-            array('There is more than one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1.7),
-            array('There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0),
-            array('There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0.0),
-            array('There are no apples', '{0.0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0),
+            ['There is almost one apple', '{0} There are no apples|]0,1[ There is almost one apple|{1} There is one apple|[1,Inf] There is more than one apple', 0.7],
+            ['There is one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1],
+            ['There is more than one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1.7],
+            ['There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0],
+            ['There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0.0],
+            ['There are no apples', '{0.0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0],
 
             // Test texts with new-lines
             // with double-quotes and \n in id & double-quotes and actual newlines in text
-            array("This is a text with a\n            new-line in it. Selector = 0.", '{0}This is a text with a
+            ["This is a text with a\n            new-line in it. Selector = 0.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 0),
+            new-line in it. Selector > 1.', 0],
             // with double-quotes and \n in id and single-quotes and actual newlines in text
-            array("This is a text with a\n            new-line in it. Selector = 1.", '{0}This is a text with a
+            ["This is a text with a\n            new-line in it. Selector = 1.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 1),
-            array("This is a text with a\n            new-line in it. Selector > 1.", '{0}This is a text with a
+            new-line in it. Selector > 1.', 1],
+            ["This is a text with a\n            new-line in it. Selector > 1.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 5),
+            new-line in it. Selector > 1.', 5],
             // with double-quotes and id split accros lines
-            array('This is a text with a
+            ['This is a text with a
             new-line in it. Selector = 1.', '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 1),
+            new-line in it. Selector > 1.', 1],
             // with single-quotes and id split accros lines
-            array('This is a text with a
+            ['This is a text with a
             new-line in it. Selector > 1.', '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 5),
+            new-line in it. Selector > 1.', 5],
             // with single-quotes and \n in text
-            array('This is a text with a\nnew-line in it. Selector = 0.', '{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.', 0),
+            ['This is a text with a\nnew-line in it. Selector = 0.', '{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.', 0],
             // with double-quotes and id split accros lines
-            array("This is a text with a\nnew-line in it. Selector = 1.", "{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.", 1),
+            ["This is a text with a\nnew-line in it. Selector = 1.", "{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.", 1],
             // esacape pipe
-            array('This is a text with | in it. Selector = 0.', '{0}This is a text with || in it. Selector = 0.|{1}This is a text with || in it. Selector = 1.', 0),
+            ['This is a text with | in it. Selector = 0.', '{0}This is a text with || in it. Selector = 0.|{1}This is a text with || in it. Selector = 1.', 0],
             // Empty plural set (2 plural forms) from a .PO file
-            array('', '|', 1),
+            ['', '|', 1],
             // Empty plural set (3 plural forms) from a .PO file
-            array('', '||', 1),
-        );
+            ['', '||', 1],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
index 0da8757aaa..696c92b2dd 100644
--- a/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
+++ b/src/Symfony/Component/Translation/Tests/PluralizationRulesTest.php
@@ -62,13 +62,13 @@ class PluralizationRulesTest extends TestCase
      */
     public function successLangcodes()
     {
-        return array(
-            array('1', array('ay', 'bo', 'cgg', 'dz', 'id', 'ja', 'jbo', 'ka', 'kk', 'km', 'ko', 'ky')),
-            array('2', array('nl', 'fr', 'en', 'de', 'de_GE', 'hy', 'hy_AM')),
-            array('3', array('be', 'bs', 'cs', 'hr')),
-            array('4', array('cy', 'mt', 'sl')),
-            array('6', array('ar')),
-        );
+        return [
+            ['1', ['ay', 'bo', 'cgg', 'dz', 'id', 'ja', 'jbo', 'ka', 'kk', 'km', 'ko', 'ky']],
+            ['2', ['nl', 'fr', 'en', 'de', 'de_GE', 'hy', 'hy_AM']],
+            ['3', ['be', 'bs', 'cs', 'hr']],
+            ['4', ['cy', 'mt', 'sl']],
+            ['6', ['ar']],
+        ];
     }
 
     /**
@@ -81,13 +81,13 @@ class PluralizationRulesTest extends TestCase
      */
     public function failingLangcodes()
     {
-        return array(
-            array('1', array('fa')),
-            array('2', array('jbo')),
-            array('3', array('cbs')),
-            array('4', array('gd', 'kw')),
-            array('5', array('ga')),
-        );
+        return [
+            ['1', ['fa']],
+            ['2', ['jbo']],
+            ['3', ['cbs']],
+            ['4', ['gd', 'kw']],
+            ['5', ['ga']],
+        ];
     }
 
     /**
@@ -111,7 +111,7 @@ class PluralizationRulesTest extends TestCase
 
     protected function generateTestData($langCodes)
     {
-        $matrix = array();
+        $matrix = [];
         foreach ($langCodes as $langCode) {
             for ($count = 0; $count < 200; ++$count) {
                 $plural = PluralizationRules::get($count, $langCode);
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
index 77c264b491..58e1936ed3 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
@@ -65,18 +65,18 @@ class TranslatorCacheTest extends TestCase
         // Prime the cache
         $translator = new Translator($locale, null, $this->tmpDir, $debug);
         $translator->addLoader($format, new ArrayLoader());
-        $translator->addResource($format, array($msgid => 'OK'), $locale);
-        $translator->addResource($format, array($msgid.'+intl' => 'OK'), $locale, 'messages+intl-icu');
+        $translator->addResource($format, [$msgid => 'OK'], $locale);
+        $translator->addResource($format, [$msgid.'+intl' => 'OK'], $locale, 'messages+intl-icu');
         $translator->trans($msgid);
-        $translator->trans($msgid.'+intl', array(), 'messages+intl-icu');
+        $translator->trans($msgid.'+intl', [], 'messages+intl-icu');
 
         // Try again and see we get a valid result whilst no loader can be used
         $translator = new Translator($locale, null, $this->tmpDir, $debug);
         $translator->addLoader($format, $this->createFailingLoader());
-        $translator->addResource($format, array($msgid => 'OK'), $locale);
-        $translator->addResource($format, array($msgid.'+intl' => 'OK'), $locale, 'messages+intl-icu');
+        $translator->addResource($format, [$msgid => 'OK'], $locale);
+        $translator->addResource($format, [$msgid.'+intl' => 'OK'], $locale, 'messages+intl-icu');
         $this->assertEquals('OK', $translator->trans($msgid), '-> caching does not work in '.($debug ? 'debug' : 'production'));
-        $this->assertEquals('OK', $translator->trans($msgid.'+intl', array(), 'messages+intl-icu'));
+        $this->assertEquals('OK', $translator->trans($msgid.'+intl', [], 'messages+intl-icu'));
     }
 
     public function testCatalogueIsReloadedWhenResourcesAreNoLongerFresh()
@@ -96,7 +96,7 @@ class TranslatorCacheTest extends TestCase
         $format = 'some_format';
         $msgid = 'test';
 
-        $catalogue = new MessageCatalogue($locale, array());
+        $catalogue = new MessageCatalogue($locale, []);
         $catalogue->addResource(new StaleResource()); // better use a helper class than a mock, because it gets serialized in the cache and re-loaded
 
         /** @var LoaderInterface|\PHPUnit_Framework_MockObject_MockObject $loader */
@@ -137,26 +137,26 @@ class TranslatorCacheTest extends TestCase
         // Create a Translator and prime its cache
         $translator = new Translator($locale, null, $this->tmpDir, $debug);
         $translator->addLoader($format, new ArrayLoader());
-        $translator->addResource($format, array($msgid => 'OK'), $locale);
+        $translator->addResource($format, [$msgid => 'OK'], $locale);
         $translator->trans($msgid);
 
         // Create another Translator with a different catalogue for the same locale
         $translator = new Translator($locale, null, $this->tmpDir, $debug);
         $translator->addLoader($format, new ArrayLoader());
-        $translator->addResource($format, array($msgid => 'FAIL'), $locale);
+        $translator->addResource($format, [$msgid => 'FAIL'], $locale);
         $translator->trans($msgid);
 
         // Now the first translator must still have a usable cache.
         $translator = new Translator($locale, null, $this->tmpDir, $debug);
         $translator->addLoader($format, $this->createFailingLoader());
-        $translator->addResource($format, array($msgid => 'OK'), $locale);
+        $translator->addResource($format, [$msgid => 'OK'], $locale);
         $this->assertEquals('OK', $translator->trans($msgid), '-> the cache was overwritten by another translator instance in '.($debug ? 'debug' : 'production'));
     }
 
     public function testGeneratedCacheFilesAreOnlyBelongRequestedLocales()
     {
         $translator = new Translator('a', null, $this->tmpDir);
-        $translator->setFallbackLocales(array('b'));
+        $translator->setFallbackLocales(['b']);
         $translator->trans('bar');
 
         $cachedFiles = glob($this->tmpDir.'/*.php');
@@ -172,24 +172,24 @@ class TranslatorCacheTest extends TestCase
          * loading a catalogue from the cache.
          */
         $translator = new Translator('a', null, $this->tmpDir);
-        $translator->setFallbackLocales(array('b'));
+        $translator->setFallbackLocales(['b']);
 
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (a)'), 'a');
-        $translator->addResource('array', array('bar' => 'bar (b)'), 'b');
+        $translator->addResource('array', ['foo' => 'foo (a)'], 'a');
+        $translator->addResource('array', ['bar' => 'bar (b)'], 'b');
 
         $this->assertEquals('bar (b)', $translator->trans('bar'));
 
         // Remove fallback locale
-        $translator->setFallbackLocales(array());
+        $translator->setFallbackLocales([]);
         $this->assertEquals('bar', $translator->trans('bar'));
 
         // Use a fresh translator with no fallback locales, result should be the same
         $translator = new Translator('a', null, $this->tmpDir);
 
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (a)'), 'a');
-        $translator->addResource('array', array('bar' => 'bar (b)'), 'b');
+        $translator->addResource('array', ['foo' => 'foo (a)'], 'a');
+        $translator->addResource('array', ['bar' => 'bar (b)'], 'b');
 
         $this->assertEquals('bar', $translator->trans('bar'));
     }
@@ -210,13 +210,13 @@ class TranslatorCacheTest extends TestCase
          * The catalogues contain distinct sets of messages.
          */
         $translator = new Translator('a', null, $this->tmpDir);
-        $translator->setFallbackLocales(array('b'));
+        $translator->setFallbackLocales(['b']);
 
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (a)'), 'a');
-        $translator->addResource('array', array('foo' => 'foo (b)'), 'b');
-        $translator->addResource('array', array('bar' => 'bar (b)'), 'b');
-        $translator->addResource('array', array('baz' => 'baz (b)'), 'b', 'messages+intl-icu');
+        $translator->addResource('array', ['foo' => 'foo (a)'], 'a');
+        $translator->addResource('array', ['foo' => 'foo (b)'], 'b');
+        $translator->addResource('array', ['bar' => 'bar (b)'], 'b');
+        $translator->addResource('array', ['baz' => 'baz (b)'], 'b', 'messages+intl-icu');
 
         $catalogue = $translator->getCatalogue('a');
         $this->assertFalse($catalogue->defines('bar')); // Sure, the "a" catalogue does not contain that message.
@@ -229,13 +229,13 @@ class TranslatorCacheTest extends TestCase
          * Behind the scenes, the cache is used. But that should not matter, right?
          */
         $translator = new Translator('a', null, $this->tmpDir);
-        $translator->setFallbackLocales(array('b'));
+        $translator->setFallbackLocales(['b']);
 
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (a)'), 'a');
-        $translator->addResource('array', array('foo' => 'foo (b)'), 'b');
-        $translator->addResource('array', array('bar' => 'bar (b)'), 'b');
-        $translator->addResource('array', array('baz' => 'baz (b)'), 'b', 'messages+intl-icu');
+        $translator->addResource('array', ['foo' => 'foo (a)'], 'a');
+        $translator->addResource('array', ['foo' => 'foo (b)'], 'b');
+        $translator->addResource('array', ['bar' => 'bar (b)'], 'b');
+        $translator->addResource('array', ['baz' => 'baz (b)'], 'b', 'messages+intl-icu');
 
         $catalogue = $translator->getCatalogue('a');
         $this->assertFalse($catalogue->defines('bar'));
@@ -253,7 +253,7 @@ class TranslatorCacheTest extends TestCase
         $loader
             ->expects($this->exactly(2))
             ->method('load')
-            ->will($this->returnValue($this->getCatalogue('fr', array(), array($resource))));
+            ->will($this->returnValue($this->getCatalogue('fr', [], [$resource])));
 
         // prime the cache
         $translator = new Translator('fr', null, $this->tmpDir, true);
@@ -268,7 +268,7 @@ class TranslatorCacheTest extends TestCase
         $translator->trans('foo');
     }
 
-    protected function getCatalogue($locale, $messages, $resources = array())
+    protected function getCatalogue($locale, $messages, $resources = [])
     {
         $catalogue = new MessageCatalogue($locale);
         foreach ($messages as $key => $translation) {
@@ -283,7 +283,7 @@ class TranslatorCacheTest extends TestCase
 
     public function runForDebugAndProduction()
     {
-        return array(array(true), array(false));
+        return [[true], [false]];
     }
 
     /**
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorTest.php b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
index bbc8ce2d21..51c4a0a048 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorTest.php
@@ -97,8 +97,8 @@ class TranslatorTest extends TestCase
         $translator = new Translator($locale);
         $translator->addLoader('loader-a', new ArrayLoader());
         $translator->addLoader('loader-b', new ArrayLoader());
-        $translator->addResource('loader-a', array('foo' => 'foofoo'), $locale, 'domain-a');
-        $translator->addResource('loader-b', array('bar' => 'foobar'), $locale, 'domain-b');
+        $translator->addResource('loader-a', ['foo' => 'foofoo'], $locale, 'domain-a');
+        $translator->addResource('loader-b', ['bar' => 'foobar'], $locale, 'domain-b');
 
         /*
          * Test that we get a single catalogue comprising messages
@@ -113,13 +113,13 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
-        $translator->addResource('array', array('bar' => 'foobar'), 'fr');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
+        $translator->addResource('array', ['bar' => 'foobar'], 'fr');
 
         // force catalogue loading
         $translator->trans('bar');
 
-        $translator->setFallbackLocales(array('fr'));
+        $translator->setFallbackLocales(['fr']);
         $this->assertEquals('foobar', $translator->trans('bar'));
     }
 
@@ -127,13 +127,13 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (en)'), 'en');
-        $translator->addResource('array', array('bar' => 'bar (fr)'), 'fr');
+        $translator->addResource('array', ['foo' => 'foo (en)'], 'en');
+        $translator->addResource('array', ['bar' => 'bar (fr)'], 'fr');
 
         // force catalogue loading
         $translator->trans('bar');
 
-        $translator->setFallbackLocales(array('fr_FR', 'fr'));
+        $translator->setFallbackLocales(['fr_FR', 'fr']);
         $this->assertEquals('bar (fr)', $translator->trans('bar'));
     }
 
@@ -144,7 +144,7 @@ class TranslatorTest extends TestCase
     public function testSetFallbackInvalidLocales($locale)
     {
         $translator = new Translator('fr');
-        $translator->setFallbackLocales(array('fr', $locale));
+        $translator->setFallbackLocales(['fr', $locale]);
     }
 
     /**
@@ -153,7 +153,7 @@ class TranslatorTest extends TestCase
     public function testSetFallbackValidLocales($locale)
     {
         $translator = new Translator($locale);
-        $translator->setFallbackLocales(array('fr', $locale));
+        $translator->setFallbackLocales(['fr', $locale]);
         // no assertion. this method just asserts that no exception is thrown
         $this->addToAssertionCount(1);
     }
@@ -161,10 +161,10 @@ class TranslatorTest extends TestCase
     public function testTransWithFallbackLocale()
     {
         $translator = new Translator('fr_FR');
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
 
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('bar' => 'foobar'), 'en');
+        $translator->addResource('array', ['bar' => 'foobar'], 'en');
 
         $this->assertEquals('foobar', $translator->trans('bar'));
     }
@@ -176,7 +176,7 @@ class TranslatorTest extends TestCase
     public function testAddResourceInvalidLocales($locale)
     {
         $translator = new Translator('fr');
-        $translator->addResource('array', array('foo' => 'foofoo'), $locale);
+        $translator->addResource('array', ['foo' => 'foofoo'], $locale);
     }
 
     /**
@@ -185,7 +185,7 @@ class TranslatorTest extends TestCase
     public function testAddResourceValidLocales($locale)
     {
         $translator = new Translator('fr');
-        $translator->addResource('array', array('foo' => 'foofoo'), $locale);
+        $translator->addResource('array', ['foo' => 'foofoo'], $locale);
         // no assertion. this method just asserts that no exception is thrown
         $this->addToAssertionCount(1);
     }
@@ -195,12 +195,12 @@ class TranslatorTest extends TestCase
         $translator = new Translator('fr');
         $translator->addLoader('array', new ArrayLoader());
 
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
 
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
         $this->assertEquals('foofoo', $translator->trans('foo'));
 
-        $translator->addResource('array', array('bar' => 'foobar'), 'en');
+        $translator->addResource('array', ['bar' => 'foobar'], 'en');
         $this->assertEquals('foobar', $translator->trans('bar'));
     }
 
@@ -231,16 +231,16 @@ class TranslatorTest extends TestCase
         $translator->addResource($format, __DIR__.'/fixtures/non-existing', 'en_GB');
         $translator->addResource($format, __DIR__.'/fixtures/resources.'.$format, 'en', 'resources');
 
-        $this->assertEquals('bar', $translator->trans('foo', array(), 'resources'));
+        $this->assertEquals('bar', $translator->trans('foo', [], 'resources'));
     }
 
     public function testTransWithIcuFallbackLocale()
     {
         $translator = new Translator('en_GB');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en_GB');
-        $translator->addResource('array', array('bar' => 'foobar'), 'en_001');
-        $translator->addResource('array', array('baz' => 'foobaz'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en_GB');
+        $translator->addResource('array', ['bar' => 'foobar'], 'en_001');
+        $translator->addResource('array', ['baz' => 'foobaz'], 'en');
         $this->assertSame('foofoo', $translator->trans('foo'));
         $this->assertSame('foobar', $translator->trans('bar'));
         $this->assertSame('foobaz', $translator->trans('baz'));
@@ -250,10 +250,10 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en_GB_scouse');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en_GB_scouse');
-        $translator->addResource('array', array('bar' => 'foobar'), 'en_GB');
-        $translator->addResource('array', array('baz' => 'foobaz'), 'en_001');
-        $translator->addResource('array', array('qux' => 'fooqux'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en_GB_scouse');
+        $translator->addResource('array', ['bar' => 'foobar'], 'en_GB');
+        $translator->addResource('array', ['baz' => 'foobaz'], 'en_001');
+        $translator->addResource('array', ['qux' => 'fooqux'], 'en');
         $this->assertSame('foofoo', $translator->trans('foo'));
         $this->assertSame('foobar', $translator->trans('bar'));
         $this->assertSame('foobaz', $translator->trans('baz'));
@@ -264,8 +264,8 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('az_Cyrl');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'az_Cyrl');
-        $translator->addResource('array', array('bar' => 'foobar'), 'az');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'az_Cyrl');
+        $translator->addResource('array', ['bar' => 'foobar'], 'az');
         $this->assertSame('foofoo', $translator->trans('foo'));
         $this->assertSame('bar', $translator->trans('bar'));
     }
@@ -274,8 +274,8 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en_US');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en_US');
-        $translator->addResource('array', array('bar' => 'foobar'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en_US');
+        $translator->addResource('array', ['bar' => 'foobar'], 'en');
         $this->assertEquals('foobar', $translator->trans('bar'));
     }
 
@@ -283,10 +283,10 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('fr_FR');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foo (en_US)'), 'en_US');
-        $translator->addResource('array', array('bar' => 'bar (en)'), 'en');
+        $translator->addResource('array', ['foo' => 'foo (en_US)'], 'en_US');
+        $translator->addResource('array', ['bar' => 'bar (en)'], 'en');
 
-        $translator->setFallbackLocales(array('en_US', 'en'));
+        $translator->setFallbackLocales(['en_US', 'en']);
 
         $this->assertEquals('foo (en_US)', $translator->trans('foo'));
         $this->assertEquals('bar (en)', $translator->trans('bar'));
@@ -295,7 +295,7 @@ class TranslatorTest extends TestCase
     public function testTransNonExistentWithFallback()
     {
         $translator = new Translator('fr');
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
         $translator->addLoader('array', new ArrayLoader());
         $this->assertEquals('non-existent', $translator->trans('non-existent'));
     }
@@ -306,7 +306,7 @@ class TranslatorTest extends TestCase
     public function testWhenAResourceHasNoRegisteredLoader()
     {
         $translator = new Translator('en');
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
 
         $translator->trans('foo');
     }
@@ -314,7 +314,7 @@ class TranslatorTest extends TestCase
     public function testNestedFallbackCatalogueWhenUsingMultipleLocales()
     {
         $translator = new Translator('fr');
-        $translator->setFallbackLocales(array('ru', 'en'));
+        $translator->setFallbackLocales(['ru', 'en']);
 
         $translator->getCatalogue('fr');
 
@@ -329,7 +329,7 @@ class TranslatorTest extends TestCase
         $translator->addResource('yml', __DIR__.'/fixtures/resources.yml', 'en');
 
         // force catalogue loading
-        $this->assertEquals('bar', $translator->trans('foo', array()));
+        $this->assertEquals('bar', $translator->trans('foo', []));
 
         $resources = $translator->getCatalogue('en')->getResources();
         $this->assertCount(1, $resources);
@@ -348,7 +348,7 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array((string) $id => $translation), $locale, $domain);
+        $translator->addResource('array', [(string) $id => $translation], $locale, $domain);
 
         $this->assertEquals($expected, $translator->trans($id, $parameters, $domain, $locale));
     }
@@ -361,9 +361,9 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
 
-        $translator->trans('foo', array(), '', $locale);
+        $translator->trans('foo', [], '', $locale);
     }
 
     /**
@@ -373,10 +373,10 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator($locale);
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('test' => 'OK'), $locale);
+        $translator->addResource('array', ['test' => 'OK'], $locale);
 
         $this->assertEquals('OK', $translator->trans('test'));
-        $this->assertEquals('OK', $translator->trans('test', array(), null, $locale));
+        $this->assertEquals('OK', $translator->trans('test', [], null, $locale));
     }
 
     /**
@@ -388,7 +388,7 @@ class TranslatorTest extends TestCase
         $translator->addLoader('array', new ArrayLoader());
         $translator->addResource('array', $messages, 'fr', '');
 
-        $this->assertEquals($expected, $translator->trans($id, array(), '', 'fr'));
+        $this->assertEquals($expected, $translator->trans($id, [], '', 'fr'));
     }
 
     /**
@@ -399,7 +399,7 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array((string) $id => $translation), $locale, $domain);
+        $translator->addResource('array', [(string) $id => $translation], $locale, $domain);
 
         $this->assertEquals($expected, $translator->transChoice($id, $number, $parameters, $domain, $locale));
     }
@@ -413,9 +413,9 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
 
-        $translator->transChoice('foo', 1, array(), '', $locale);
+        $translator->transChoice('foo', 1, [], '', $locale);
     }
 
     /**
@@ -426,118 +426,118 @@ class TranslatorTest extends TestCase
     {
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('foo' => 'foofoo'), 'en');
+        $translator->addResource('array', ['foo' => 'foofoo'], 'en');
 
-        $translator->transChoice('foo', 1, array(), '', $locale);
+        $translator->transChoice('foo', 1, [], '', $locale);
         // no assertion. this method just asserts that no exception is thrown
         $this->addToAssertionCount(1);
     }
 
     public function getTransFileTests()
     {
-        return array(
-            array('csv', 'CsvFileLoader'),
-            array('ini', 'IniFileLoader'),
-            array('mo', 'MoFileLoader'),
-            array('po', 'PoFileLoader'),
-            array('php', 'PhpFileLoader'),
-            array('ts', 'QtFileLoader'),
-            array('xlf', 'XliffFileLoader'),
-            array('yml', 'YamlFileLoader'),
-            array('json', 'JsonFileLoader'),
-        );
+        return [
+            ['csv', 'CsvFileLoader'],
+            ['ini', 'IniFileLoader'],
+            ['mo', 'MoFileLoader'],
+            ['po', 'PoFileLoader'],
+            ['php', 'PhpFileLoader'],
+            ['ts', 'QtFileLoader'],
+            ['xlf', 'XliffFileLoader'],
+            ['yml', 'YamlFileLoader'],
+            ['json', 'JsonFileLoader'],
+        ];
     }
 
     public function getTransTests()
     {
-        return array(
-            array('Symfony est super !', 'Symfony is great!', 'Symfony est super !', array(), 'fr', ''),
-            array('Symfony est awesome !', 'Symfony is %what%!', 'Symfony est %what% !', array('%what%' => 'awesome'), 'fr', ''),
-            array('Symfony est super !', new StringClass('Symfony is great!'), 'Symfony est super !', array(), 'fr', ''),
-        );
+        return [
+            ['Symfony est super !', 'Symfony is great!', 'Symfony est super !', [], 'fr', ''],
+            ['Symfony est awesome !', 'Symfony is %what%!', 'Symfony est %what% !', ['%what%' => 'awesome'], 'fr', ''],
+            ['Symfony est super !', new StringClass('Symfony is great!'), 'Symfony est super !', [], 'fr', ''],
+        ];
     }
 
     public function getFlattenedTransTests()
     {
-        $messages = array(
-            'symfony' => array(
-                'is' => array(
+        $messages = [
+            'symfony' => [
+                'is' => [
                     'great' => 'Symfony est super!',
-                ),
-            ),
-            'foo' => array(
-                'bar' => array(
+                ],
+            ],
+            'foo' => [
+                'bar' => [
                     'baz' => 'Foo Bar Baz',
-                ),
+                ],
                 'baz' => 'Foo Baz',
-            ),
-        );
+            ],
+        ];
 
-        return array(
-            array('Symfony est super!', $messages, 'symfony.is.great'),
-            array('Foo Bar Baz', $messages, 'foo.bar.baz'),
-            array('Foo Baz', $messages, 'foo.baz'),
-        );
+        return [
+            ['Symfony est super!', $messages, 'symfony.is.great'],
+            ['Foo Bar Baz', $messages, 'foo.bar.baz'],
+            ['Foo Baz', $messages, 'foo.baz'],
+        ];
     }
 
     public function getTransChoiceTests()
     {
-        return array(
-            array('Il y a 0 pomme', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, array(), 'fr', ''),
-            array('Il y a 1 pomme', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 1, array(), 'fr', ''),
-            array('Il y a 10 pommes', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 10, array(), 'fr', ''),
+        return [
+            ['Il y a 0 pomme', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, [], 'fr', ''],
+            ['Il y a 1 pomme', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 1, [], 'fr', ''],
+            ['Il y a 10 pommes', '{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples', '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 10, [], 'fr', ''],
 
-            array('Il y a 0 pomme', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 0, array(), 'fr', ''),
-            array('Il y a 1 pomme', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 1, array(), 'fr', ''),
-            array('Il y a 10 pommes', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 10, array(), 'fr', ''),
+            ['Il y a 0 pomme', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 0, [], 'fr', ''],
+            ['Il y a 1 pomme', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 1, [], 'fr', ''],
+            ['Il y a 10 pommes', 'There is one apple|There is %count% apples', 'Il y a %count% pomme|Il y a %count% pommes', 10, [], 'fr', ''],
 
-            array('Il y a 0 pomme', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 0, array(), 'fr', ''),
-            array('Il y a 1 pomme', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 1, array(), 'fr', ''),
-            array('Il y a 10 pommes', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 10, array(), 'fr', ''),
+            ['Il y a 0 pomme', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 0, [], 'fr', ''],
+            ['Il y a 1 pomme', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 1, [], 'fr', ''],
+            ['Il y a 10 pommes', 'one: There is one apple|more: There is %count% apples', 'one: Il y a %count% pomme|more: Il y a %count% pommes', 10, [], 'fr', ''],
 
-            array('Il n\'y a aucune pomme', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 0, array(), 'fr', ''),
-            array('Il y a 1 pomme', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 1, array(), 'fr', ''),
-            array('Il y a 10 pommes', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 10, array(), 'fr', ''),
+            ['Il n\'y a aucune pomme', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 0, [], 'fr', ''],
+            ['Il y a 1 pomme', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 1, [], 'fr', ''],
+            ['Il y a 10 pommes', '{0} There are no apples|one: There is one apple|more: There is %count% apples', '{0} Il n\'y a aucune pomme|one: Il y a %count% pomme|more: Il y a %count% pommes', 10, [], 'fr', ''],
 
-            array('Il y a 0 pomme', new StringClass('{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples'), '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, array(), 'fr', ''),
+            ['Il y a 0 pomme', new StringClass('{0} There are no appless|{1} There is one apple|]1,Inf] There is %count% apples'), '[0,1] Il y a %count% pomme|]1,Inf] Il y a %count% pommes', 0, [], 'fr', ''],
 
             // Override %count% with a custom value
-            array('Il y a quelques pommes', 'one: There is one apple|more: There are %count% apples', 'one: Il y a %count% pomme|more: Il y a quelques pommes', 2, array('%count%' => 'quelques'), 'fr', ''),
-        );
+            ['Il y a quelques pommes', 'one: There is one apple|more: There are %count% apples', 'one: Il y a %count% pomme|more: Il y a quelques pommes', 2, ['%count%' => 'quelques'], 'fr', ''],
+        ];
     }
 
     public function getInvalidLocalesTests()
     {
-        return array(
-            array('fr FR'),
-            array('français'),
-            array('fr+en'),
-            array('utf#8'),
-            array('fr&en'),
-            array('fr~FR'),
-            array(' fr'),
-            array('fr '),
-            array('fr*'),
-            array('fr/FR'),
-            array('fr\\FR'),
-        );
+        return [
+            ['fr FR'],
+            ['français'],
+            ['fr+en'],
+            ['utf#8'],
+            ['fr&en'],
+            ['fr~FR'],
+            [' fr'],
+            ['fr '],
+            ['fr*'],
+            ['fr/FR'],
+            ['fr\\FR'],
+        ];
     }
 
     public function getValidLocalesTests()
     {
-        return array(
-            array(''),
-            array(null),
-            array('fr'),
-            array('francais'),
-            array('FR'),
-            array('frFR'),
-            array('fr-FR'),
-            array('fr_FR'),
-            array('fr.FR'),
-            array('fr-FR.UTF8'),
-            array('sr@latin'),
-        );
+        return [
+            [''],
+            [null],
+            ['fr'],
+            ['francais'],
+            ['FR'],
+            ['frFR'],
+            ['fr-FR'],
+            ['fr_FR'],
+            ['fr.FR'],
+            ['fr-FR.UTF8'],
+            ['sr@latin'],
+        ];
     }
 
     /**
@@ -548,11 +548,11 @@ class TranslatorTest extends TestCase
         $translator = new Translator('en');
         $translator->addLoader('array', new ArrayLoader());
 
-        $translator->addResource('array', array('some_message' => 'Hello %name%'), 'en');
-        $this->assertSame('Hello Bob', $translator->trans('some_message', array('%name%' => 'Bob')));
+        $translator->addResource('array', ['some_message' => 'Hello %name%'], 'en');
+        $this->assertSame('Hello Bob', $translator->trans('some_message', ['%name%' => 'Bob']));
 
-        $translator->addResource('array', array('some_message' => 'Hi {name}'), 'en', 'messages+intl-icu');
-        $this->assertSame('Hi Bob', $translator->trans('some_message', array('%name%' => 'Bob')));
+        $translator->addResource('array', ['some_message' => 'Hi {name}'], 'en', 'messages+intl-icu');
+        $this->assertSame('Hi Bob', $translator->trans('some_message', ['%name%' => 'Bob']));
     }
 
     /**
@@ -561,11 +561,11 @@ class TranslatorTest extends TestCase
     public function testTransChoiceFallback()
     {
         $translator = new Translator('ru');
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('some_message2' => 'one thing|%count% things'), 'en');
+        $translator->addResource('array', ['some_message2' => 'one thing|%count% things'], 'en');
 
-        $this->assertEquals('10 things', $translator->transChoice('some_message2', 10, array('%count%' => 10)));
+        $this->assertEquals('10 things', $translator->transChoice('some_message2', 10, ['%count%' => 10]));
     }
 
     /**
@@ -574,11 +574,11 @@ class TranslatorTest extends TestCase
     public function testTransChoiceFallbackBis()
     {
         $translator = new Translator('ru');
-        $translator->setFallbackLocales(array('en_US', 'en'));
+        $translator->setFallbackLocales(['en_US', 'en']);
         $translator->addLoader('array', new ArrayLoader());
-        $translator->addResource('array', array('some_message2' => 'one thing|%count% things'), 'en_US');
+        $translator->addResource('array', ['some_message2' => 'one thing|%count% things'], 'en_US');
 
-        $this->assertEquals('10 things', $translator->transChoice('some_message2', 10, array('%count%' => 10)));
+        $this->assertEquals('10 things', $translator->transChoice('some_message2', 10, ['%count%' => 10]));
     }
 
     /**
@@ -587,12 +587,12 @@ class TranslatorTest extends TestCase
     public function testTransChoiceFallbackWithNoTranslation()
     {
         $translator = new Translator('ru');
-        $translator->setFallbackLocales(array('en'));
+        $translator->setFallbackLocales(['en']);
         $translator->addLoader('array', new ArrayLoader());
 
         // consistent behavior with Translator::trans(), which returns the string
         // unchanged if it can't be found
-        $this->assertEquals('some_message2', $translator->transChoice('some_message2', 10, array('%count%' => 10)));
+        $this->assertEquals('some_message2', $translator->transChoice('some_message2', 10, ['%count%' => 10]));
     }
 }
 
diff --git a/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php b/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
index dbb5424f1c..b0335415e1 100644
--- a/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Util/ArrayConverterTest.php
@@ -26,49 +26,49 @@ class ArrayConverterTest extends TestCase
 
     public function messagesData()
     {
-        return array(
-            array(
+        return [
+            [
                 // input
-                array(
+                [
                     'foo1' => 'bar',
                     'foo.bar' => 'value',
-                ),
+                ],
                 // expected output
-                array(
+                [
                     'foo1' => 'bar',
-                    'foo' => array('bar' => 'value'),
-                ),
-            ),
-            array(
+                    'foo' => ['bar' => 'value'],
+                ],
+            ],
+            [
                 // input
-                array(
+                [
                     'foo.bar' => 'value1',
                     'foo.bar.test' => 'value2',
-                ),
+                ],
                 // expected output
-                array(
-                    'foo' => array(
+                [
+                    'foo' => [
                         'bar' => 'value1',
                         'bar.test' => 'value2',
-                    ),
-                ),
-            ),
-            array(
+                    ],
+                ],
+            ],
+            [
                 // input
-                array(
+                [
                     'foo.level2.level3.level4' => 'value1',
                     'foo.level2' => 'value2',
                     'foo.bar' => 'value3',
-                ),
+                ],
                 // expected output
-                array(
-                    'foo' => array(
+                [
+                    'foo' => [
                         'level2' => 'value2',
                         'level2.level3.level4' => 'value1',
                         'bar' => 'value3',
-                    ),
-                ),
-            ),
-        );
+                    ],
+                ],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php b/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
index ab66af13e7..d3b6754d33 100644
--- a/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
+++ b/src/Symfony/Component/Translation/Tests/Writer/TranslationWriterTest.php
@@ -49,7 +49,7 @@ class TranslationWriterTest extends TestCase
 
 class NonBackupDumper implements DumperInterface
 {
-    public function dump(MessageCatalogue $messages, $options = array())
+    public function dump(MessageCatalogue $messages, $options = [])
     {
     }
 }
@@ -58,7 +58,7 @@ class BackupDumper implements DumperInterface
 {
     public $backup = true;
 
-    public function dump(MessageCatalogue $messages, $options = array())
+    public function dump(MessageCatalogue $messages, $options = [])
     {
     }
 
diff --git a/src/Symfony/Component/Translation/Tests/fixtures/extractor/translation.html.php b/src/Symfony/Component/Translation/Tests/fixtures/extractor/translation.html.php
index 1ce8ea94fd..11261311a1 100644
--- a/src/Symfony/Component/Translation/Tests/fixtures/extractor/translation.html.php
+++ b/src/Symfony/Component/Translation/Tests/fixtures/extractor/translation.html.php
@@ -29,21 +29,21 @@ EOF
 <?php echo $view['translator']->transChoice(
     '{0} There is no apples|{1} There is one apple|]1,Inf[ There are %count% apples',
     10,
-    array('%count%' => 10)
+    ['%count%' => 10]
 ); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-no-params-short-array', array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-no-params-short-array', [], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-no-params-long-array', array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-no-params-long-array', [], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-params-short-array', array('foo' => 'bar'), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-params-short-array', ['foo' => 'bar'], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('other-domain-test-params-long-array', array('foo' => 'bar'), 'not_messages'); ?>
+<?php echo $view['translator']->trans('other-domain-test-params-long-array', ['foo' => 'bar'], 'not_messages'); ?>
 
-<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-short-array-%count%', 10, array('%count%' => 10), 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-short-array-%count%', 10, ['%count%' => 10], 'not_messages'); ?>
 
-<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-long-array-%count%', 10, array('%count%' => 10), 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('other-domain-test-trans-choice-long-array-%count%', 10, ['%count%' => 10], 'not_messages'); ?>
 
-<?php echo $view['translator']->trans('typecast', array('a' => (int) '123'), 'not_messages'); ?>
-<?php echo $view['translator']->transChoice('msg1', 10 + 1, array(), 'not_messages'); ?>
-<?php echo $view['translator']->transChoice('msg2', ceil(4.5), array(), 'not_messages'); ?>
+<?php echo $view['translator']->trans('typecast', ['a' => (int) '123'], 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('msg1', 10 + 1, [], 'not_messages'); ?>
+<?php echo $view['translator']->transChoice('msg2', ceil(4.5), [], 'not_messages'); ?>
diff --git a/src/Symfony/Component/Translation/Translator.php b/src/Symfony/Component/Translation/Translator.php
index 7fcb77853d..8a2b2dd9d0 100644
--- a/src/Symfony/Component/Translation/Translator.php
+++ b/src/Symfony/Component/Translation/Translator.php
@@ -34,7 +34,7 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
     /**
      * @var MessageCatalogueInterface[]
      */
-    protected $catalogues = array();
+    protected $catalogues = [];
 
     /**
      * @var string
@@ -44,17 +44,17 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
     /**
      * @var array
      */
-    private $fallbackLocales = array();
+    private $fallbackLocales = [];
 
     /**
      * @var LoaderInterface[]
      */
-    private $loaders = array();
+    private $loaders = [];
 
     /**
      * @var array
      */
-    private $resources = array();
+    private $resources = [];
 
     /**
      * @var MessageFormatterInterface
@@ -134,10 +134,10 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
 
         $this->assertValidLocale($locale);
 
-        $this->resources[$locale][] = array($format, $resource, $domain);
+        $this->resources[$locale][] = [$format, $resource, $domain];
 
         if (\in_array($locale, $this->fallbackLocales)) {
-            $this->catalogues = array();
+            $this->catalogues = [];
         } else {
             unset($this->catalogues[$locale]);
         }
@@ -170,7 +170,7 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
     public function setFallbackLocales(array $locales)
     {
         // needed as the fallback locales are linked to the already loaded catalogues
-        $this->catalogues = array();
+        $this->catalogues = [];
 
         foreach ($locales as $locale) {
             $this->assertValidLocale($locale);
@@ -194,7 +194,7 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
     /**
      * {@inheritdoc}
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         if (null === $domain) {
             $domain = 'messages';
@@ -224,7 +224,7 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
      *
      * @deprecated since Symfony 4.2, use the trans() method instead with a %count% parameter
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2, use the trans() one instead with a "%%count%%" parameter.', __METHOD__), E_USER_DEPRECATED);
 
@@ -249,7 +249,7 @@ class Translator implements LegacyTranslatorInterface, TranslatorInterface, Tran
         }
 
         if ($this->hasIntlFormatter && $catalogue->defines($id, $domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) {
-            return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, array('%count%' => $number) + $parameters);
+            return $this->formatter->formatIntl($catalogue->get($id, $domain), $locale, ['%count%' => $number] + $parameters);
         }
 
         return $this->formatter->choiceFormat($catalogue->get($id, $domain), $number, $locale, $parameters);
@@ -433,7 +433,7 @@ EOF
             $parentLocales = \json_decode(\file_get_contents(__DIR__.'/Resources/data/parents.json'), true);
         }
 
-        $locales = array();
+        $locales = [];
         foreach ($this->fallbackLocales as $fallback) {
             if ($fallback === $locale) {
                 continue;
@@ -490,7 +490,7 @@ EOF
 
     private function getAllMessages(MessageCatalogueInterface $catalogue): array
     {
-        $allMessages = array();
+        $allMessages = [];
 
         foreach ($catalogue->all() as $domain => $messages) {
             if ($intlMessages = $catalogue->all($domain.MessageCatalogue::INTL_DOMAIN_SUFFIX)) {
diff --git a/src/Symfony/Component/Translation/TranslatorInterface.php b/src/Symfony/Component/Translation/TranslatorInterface.php
index 77f14868e6..f677d2455f 100644
--- a/src/Symfony/Component/Translation/TranslatorInterface.php
+++ b/src/Symfony/Component/Translation/TranslatorInterface.php
@@ -35,7 +35,7 @@ interface TranslatorInterface extends LocaleAwareInterface
      *
      * @throws InvalidArgumentException If the locale contains invalid characters
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null);
+    public function trans($id, array $parameters = [], $domain = null, $locale = null);
 
     /**
      * Translates the given choice message by choosing a translation according to a number.
@@ -50,7 +50,7 @@ interface TranslatorInterface extends LocaleAwareInterface
      *
      * @throws InvalidArgumentException If the locale contains invalid characters
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null);
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null);
 
     /**
      * Sets the current locale.
diff --git a/src/Symfony/Component/Translation/Util/ArrayConverter.php b/src/Symfony/Component/Translation/Util/ArrayConverter.php
index e8b7559dfb..0276294f62 100644
--- a/src/Symfony/Component/Translation/Util/ArrayConverter.php
+++ b/src/Symfony/Component/Translation/Util/ArrayConverter.php
@@ -27,7 +27,7 @@ class ArrayConverter
 {
     /**
      * Converts linear messages array to tree-like array.
-     * For example this rray('foo.bar' => 'value') will be converted to array('foo' => array('bar' => 'value')).
+     * For example this rray('foo.bar' => 'value') will be converted to ['foo' => ['bar' => 'value']].
      *
      * @param array $messages Linear messages array
      *
@@ -35,7 +35,7 @@ class ArrayConverter
      */
     public static function expandToTree(array $messages)
     {
-        $tree = array();
+        $tree = [];
 
         foreach ($messages as $id => $value) {
             $referenceToElement = &self::getElementByPath($tree, explode('.', $id));
diff --git a/src/Symfony/Component/Translation/Util/XliffUtils.php b/src/Symfony/Component/Translation/Util/XliffUtils.php
index 9f024e5985..3ace285bfa 100644
--- a/src/Symfony/Component/Translation/Util/XliffUtils.php
+++ b/src/Symfony/Component/Translation/Util/XliffUtils.php
@@ -77,7 +77,7 @@ class XliffUtils
         libxml_clear_errors();
         libxml_use_internal_errors($internalErrors);
 
-        return array();
+        return [];
     }
 
     public static function getErrorsAsString(array $xmlErrors): string
@@ -143,16 +143,16 @@ class XliffUtils
      */
     private static function getXmlErrors(bool $internalErrors): array
     {
-        $errors = array();
+        $errors = [];
         foreach (libxml_get_errors() as $error) {
-            $errors[] = array(
+            $errors[] = [
                 'level' => LIBXML_ERR_WARNING == $error->level ? 'WARNING' : 'ERROR',
                 'code' => $error->code,
                 'message' => trim($error->message),
                 'file' => $error->file ?: 'n/a',
                 'line' => $error->line,
                 'column' => $error->column,
-            );
+            ];
         }
 
         libxml_clear_errors();
diff --git a/src/Symfony/Component/Translation/Writer/TranslationWriter.php b/src/Symfony/Component/Translation/Writer/TranslationWriter.php
index 762733b4f2..a44d24c136 100644
--- a/src/Symfony/Component/Translation/Writer/TranslationWriter.php
+++ b/src/Symfony/Component/Translation/Writer/TranslationWriter.php
@@ -23,7 +23,7 @@ use Symfony\Component\Translation\MessageCatalogue;
  */
 class TranslationWriter implements TranslationWriterInterface
 {
-    private $dumpers = array();
+    private $dumpers = [];
 
     /**
      * Adds a dumper to the writer.
@@ -71,7 +71,7 @@ class TranslationWriter implements TranslationWriterInterface
      *
      * @throws InvalidArgumentException
      */
-    public function write(MessageCatalogue $catalogue, $format, $options = array())
+    public function write(MessageCatalogue $catalogue, $format, $options = [])
     {
         if (!isset($this->dumpers[$format])) {
             throw new InvalidArgumentException(sprintf('There is no dumper associated with format "%s".', $format));
diff --git a/src/Symfony/Component/Translation/Writer/TranslationWriterInterface.php b/src/Symfony/Component/Translation/Writer/TranslationWriterInterface.php
index 992ab769a0..b07c08e236 100644
--- a/src/Symfony/Component/Translation/Writer/TranslationWriterInterface.php
+++ b/src/Symfony/Component/Translation/Writer/TranslationWriterInterface.php
@@ -30,5 +30,5 @@ interface TranslationWriterInterface
      *
      * @throws InvalidArgumentException
      */
-    public function write(MessageCatalogue $catalogue, $format, $options = array());
+    public function write(MessageCatalogue $catalogue, $format, $options = []);
 }
diff --git a/src/Symfony/Component/Validator/Constraint.php b/src/Symfony/Component/Validator/Constraint.php
index f967055211..4b7e6bc083 100644
--- a/src/Symfony/Component/Validator/Constraint.php
+++ b/src/Symfony/Component/Validator/Constraint.php
@@ -49,7 +49,7 @@ abstract class Constraint
     /**
      * Maps error codes to the names of their constants.
      */
-    protected static $errorNames = array();
+    protected static $errorNames = [];
 
     /**
      * Domain-specific data attached to a constraint.
@@ -105,7 +105,7 @@ abstract class Constraint
      */
     public function __construct($options = null)
     {
-        $invalidOptions = array();
+        $invalidOptions = [];
         $missingOptions = array_flip((array) $this->getRequiredOptions());
         $knownOptions = get_object_vars($this);
 
@@ -173,7 +173,7 @@ abstract class Constraint
             return;
         }
 
-        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), array($option));
+        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), [$option]);
     }
 
     /**
@@ -194,12 +194,12 @@ abstract class Constraint
     public function __get($option)
     {
         if ('groups' === $option) {
-            $this->groups = array(self::DEFAULT_GROUP);
+            $this->groups = [self::DEFAULT_GROUP];
 
             return $this->groups;
         }
 
-        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), array($option));
+        throw new InvalidOptionsException(sprintf('The option "%s" does not exist in constraint %s', $option, \get_class($this)), [$option]);
     }
 
     /**
@@ -248,7 +248,7 @@ abstract class Constraint
      */
     public function getRequiredOptions()
     {
-        return array();
+        return [];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/ConstraintValidatorFactory.php b/src/Symfony/Component/Validator/ConstraintValidatorFactory.php
index 86e44e2a55..45f3ca94e8 100644
--- a/src/Symfony/Component/Validator/ConstraintValidatorFactory.php
+++ b/src/Symfony/Component/Validator/ConstraintValidatorFactory.php
@@ -24,7 +24,7 @@ use Symfony\Component\Validator\Constraints\ExpressionValidator;
  */
 class ConstraintValidatorFactory implements ConstraintValidatorFactoryInterface
 {
-    protected $validators = array();
+    protected $validators = [];
 
     public function __construct()
     {
diff --git a/src/Symfony/Component/Validator/ConstraintViolationList.php b/src/Symfony/Component/Validator/ConstraintViolationList.php
index c18dd2195f..c30ee57cb2 100644
--- a/src/Symfony/Component/Validator/ConstraintViolationList.php
+++ b/src/Symfony/Component/Validator/ConstraintViolationList.php
@@ -21,14 +21,14 @@ class ConstraintViolationList implements \IteratorAggregate, ConstraintViolation
     /**
      * @var ConstraintViolationInterface[]
      */
-    private $violations = array();
+    private $violations = [];
 
     /**
      * Creates a new constraint violation list.
      *
      * @param ConstraintViolationInterface[] $violations The constraint violations to add to the list
      */
-    public function __construct(array $violations = array())
+    public function __construct(array $violations = [])
     {
         foreach ($violations as $violation) {
             $this->add($violation);
@@ -169,7 +169,7 @@ class ConstraintViolationList implements \IteratorAggregate, ConstraintViolation
     public function findByCodes($codes)
     {
         $codes = (array) $codes;
-        $violations = array();
+        $violations = [];
         foreach ($this as $violation) {
             if (\in_array($violation->getCode(), $codes, true)) {
                 $violations[] = $violation;
diff --git a/src/Symfony/Component/Validator/Constraints/AbstractComparison.php b/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
index 0a7e2f3fb7..89c2690c08 100644
--- a/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
+++ b/src/Symfony/Component/Validator/Constraints/AbstractComparison.php
@@ -33,7 +33,7 @@ abstract class AbstractComparison extends Constraint
     public function __construct($options = null)
     {
         if (null === $options) {
-            $options = array();
+            $options = [];
         }
 
         if (\is_array($options)) {
diff --git a/src/Symfony/Component/Validator/Constraints/All.php b/src/Symfony/Component/Validator/Constraints/All.php
index b531a1d645..d3fe49525f 100644
--- a/src/Symfony/Component/Validator/Constraints/All.php
+++ b/src/Symfony/Component/Validator/Constraints/All.php
@@ -19,7 +19,7 @@ namespace Symfony\Component\Validator\Constraints;
  */
 class All extends Composite
 {
-    public $constraints = array();
+    public $constraints = [];
 
     public function getDefaultOption()
     {
@@ -28,7 +28,7 @@ class All extends Composite
 
     public function getRequiredOptions()
     {
-        return array('constraints');
+        return ['constraints'];
     }
 
     protected function getCompositeOption()
diff --git a/src/Symfony/Component/Validator/Constraints/Bic.php b/src/Symfony/Component/Validator/Constraints/Bic.php
index 2e1fa68df1..9637d9576a 100644
--- a/src/Symfony/Component/Validator/Constraints/Bic.php
+++ b/src/Symfony/Component/Validator/Constraints/Bic.php
@@ -32,13 +32,13 @@ class Bic extends Constraint
     const INVALID_CASE_ERROR = '11884038-3312-4ae5-9d04-699f782130c7';
     const INVALID_IBAN_COUNTRY_CODE_ERROR = '29a2c3bb-587b-4996-b6f5-53081364cea5';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_LENGTH_ERROR => 'INVALID_LENGTH_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::INVALID_BANK_CODE_ERROR => 'INVALID_BANK_CODE_ERROR',
         self::INVALID_COUNTRY_CODE_ERROR => 'INVALID_COUNTRY_CODE_ERROR',
         self::INVALID_CASE_ERROR => 'INVALID_CASE_ERROR',
-    );
+    ];
 
     public $message = 'This is not a valid Business Identifier Code (BIC).';
     public $ibanMessage = 'This Business Identifier Code (BIC) is not associated with IBAN {{ iban }}.';
diff --git a/src/Symfony/Component/Validator/Constraints/BicValidator.php b/src/Symfony/Component/Validator/Constraints/BicValidator.php
index a8e9d07ba6..c58f8ac7de 100644
--- a/src/Symfony/Component/Validator/Constraints/BicValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/BicValidator.php
@@ -75,7 +75,7 @@ class BicValidator extends ConstraintValidator
         $canonicalize = str_replace(' ', '', $value);
 
         // the bic must be either 8 or 11 characters long
-        if (!\in_array(\strlen($canonicalize), array(8, 11))) {
+        if (!\in_array(\strlen($canonicalize), [8, 11])) {
             $this->context->buildViolation($constraint->message)
                 ->setParameter('{{ value }}', $this->formatValue($value))
                 ->setCode(Bic::INVALID_LENGTH_ERROR)
diff --git a/src/Symfony/Component/Validator/Constraints/Blank.php b/src/Symfony/Component/Validator/Constraints/Blank.php
index 030b21f959..4fa913c85f 100644
--- a/src/Symfony/Component/Validator/Constraints/Blank.php
+++ b/src/Symfony/Component/Validator/Constraints/Blank.php
@@ -23,9 +23,9 @@ class Blank extends Constraint
 {
     const NOT_BLANK_ERROR = '183ad2de-533d-4796-a439-6d3c3852b549';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_BLANK_ERROR => 'NOT_BLANK_ERROR',
-    );
+    ];
 
     public $message = 'This value should be blank.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Callback.php b/src/Symfony/Component/Validator/Constraints/Callback.php
index 16231105e1..8bf6d68cac 100644
--- a/src/Symfony/Component/Validator/Constraints/Callback.php
+++ b/src/Symfony/Component/Validator/Constraints/Callback.php
@@ -37,7 +37,7 @@ class Callback extends Constraint
         }
 
         if (\is_array($options) && !isset($options['callback']) && !isset($options['groups']) && !isset($options['payload'])) {
-            $options = array('callback' => $options);
+            $options = ['callback' => $options];
         }
 
         parent::__construct($options);
@@ -56,6 +56,6 @@ class Callback extends Constraint
      */
     public function getTargets()
     {
-        return array(self::CLASS_CONSTRAINT, self::PROPERTY_CONSTRAINT);
+        return [self::CLASS_CONSTRAINT, self::PROPERTY_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/CardScheme.php b/src/Symfony/Component/Validator/Constraints/CardScheme.php
index 40c32e879e..4284826008 100644
--- a/src/Symfony/Component/Validator/Constraints/CardScheme.php
+++ b/src/Symfony/Component/Validator/Constraints/CardScheme.php
@@ -27,10 +27,10 @@ class CardScheme extends Constraint
     const NOT_NUMERIC_ERROR = 'a2ad9231-e827-485f-8a1e-ef4d9a6d5c2e';
     const INVALID_FORMAT_ERROR = 'a8faedbf-1c2f-4695-8d22-55783be8efed';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_NUMERIC_ERROR => 'NOT_NUMERIC_ERROR',
         self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
-    );
+    ];
 
     public $message = 'Unsupported card type or invalid card number.';
     public $schemes;
@@ -42,6 +42,6 @@ class CardScheme extends Constraint
 
     public function getRequiredOptions()
     {
-        return array('schemes');
+        return ['schemes'];
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Choice.php b/src/Symfony/Component/Validator/Constraints/Choice.php
index 8c4c23ad0e..9409491446 100644
--- a/src/Symfony/Component/Validator/Constraints/Choice.php
+++ b/src/Symfony/Component/Validator/Constraints/Choice.php
@@ -25,11 +25,11 @@ class Choice extends Constraint
     const TOO_FEW_ERROR = '11edd7eb-5872-4b6e-9f12-89923999fd0e';
     const TOO_MANY_ERROR = '9bd98e49-211c-433f-8630-fd1c2d0f08c3';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NO_SUCH_CHOICE_ERROR => 'NO_SUCH_CHOICE_ERROR',
         self::TOO_FEW_ERROR => 'TOO_FEW_ERROR',
         self::TOO_MANY_ERROR => 'TOO_MANY_ERROR',
-    );
+    ];
 
     public $choices;
     public $callback;
diff --git a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
index c97d8a6880..d1ef66eeda 100644
--- a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
@@ -48,8 +48,8 @@ class ChoiceValidator extends ConstraintValidator
         }
 
         if ($constraint->callback) {
-            if (!\is_callable($choices = array($this->context->getObject(), $constraint->callback))
-                && !\is_callable($choices = array($this->context->getClassName(), $constraint->callback))
+            if (!\is_callable($choices = [$this->context->getObject(), $constraint->callback])
+                && !\is_callable($choices = [$this->context->getClassName(), $constraint->callback])
                 && !\is_callable($choices = $constraint->callback)
             ) {
                 throw new ConstraintDefinitionException('The Choice constraint expects a valid callback');
diff --git a/src/Symfony/Component/Validator/Constraints/Collection.php b/src/Symfony/Component/Validator/Constraints/Collection.php
index 2b5679b22d..21427722d9 100644
--- a/src/Symfony/Component/Validator/Constraints/Collection.php
+++ b/src/Symfony/Component/Validator/Constraints/Collection.php
@@ -24,12 +24,12 @@ class Collection extends Composite
     const MISSING_FIELD_ERROR = '2fa2158c-2a7f-484b-98aa-975522539ff8';
     const NO_SUCH_FIELD_ERROR = '7703c766-b5d5-4cef-ace7-ae0dd82304e9';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::MISSING_FIELD_ERROR => 'MISSING_FIELD_ERROR',
         self::NO_SUCH_FIELD_ERROR => 'NO_SUCH_FIELD_ERROR',
-    );
+    ];
 
-    public $fields = array();
+    public $fields = [];
     public $allowExtraFields = false;
     public $allowMissingFields = false;
     public $extraFieldsMessage = 'This field was not expected.';
@@ -42,8 +42,8 @@ class Collection extends Composite
     {
         // no known options set? $options is the fields array
         if (\is_array($options)
-            && !array_intersect(array_keys($options), array('groups', 'fields', 'allowExtraFields', 'allowMissingFields', 'extraFieldsMessage', 'missingFieldsMessage'))) {
-            $options = array('fields' => $options);
+            && !array_intersect(array_keys($options), ['groups', 'fields', 'allowExtraFields', 'allowMissingFields', 'extraFieldsMessage', 'missingFieldsMessage'])) {
+            $options = ['fields' => $options];
         }
 
         parent::__construct($options);
@@ -75,7 +75,7 @@ class Collection extends Composite
 
     public function getRequiredOptions()
     {
-        return array('fields');
+        return ['fields'];
     }
 
     protected function getCompositeOption()
diff --git a/src/Symfony/Component/Validator/Constraints/Composite.php b/src/Symfony/Component/Validator/Constraints/Composite.php
index d233f06335..18ea5e319f 100644
--- a/src/Symfony/Component/Validator/Constraints/Composite.php
+++ b/src/Symfony/Component/Validator/Constraints/Composite.php
@@ -62,7 +62,7 @@ abstract class Composite extends Constraint
         $nestedConstraints = $this->$compositeOption;
 
         if (!\is_array($nestedConstraints)) {
-            $nestedConstraints = array($nestedConstraints);
+            $nestedConstraints = [$nestedConstraints];
         }
 
         foreach ($nestedConstraints as $constraint) {
@@ -80,7 +80,7 @@ abstract class Composite extends Constraint
         }
 
         if (!property_exists($this, 'groups')) {
-            $mergedGroups = array();
+            $mergedGroups = [];
 
             foreach ($nestedConstraints as $constraint) {
                 foreach ($constraint->groups as $group) {
diff --git a/src/Symfony/Component/Validator/Constraints/Count.php b/src/Symfony/Component/Validator/Constraints/Count.php
index 0a54ee78db..8de10edfc8 100644
--- a/src/Symfony/Component/Validator/Constraints/Count.php
+++ b/src/Symfony/Component/Validator/Constraints/Count.php
@@ -25,10 +25,10 @@ class Count extends Constraint
     const TOO_FEW_ERROR = 'bef8e338-6ae5-4caf-b8e2-50e7b0579e69';
     const TOO_MANY_ERROR = '756b1212-697c-468d-a9ad-50dd783bb169';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_FEW_ERROR => 'TOO_FEW_ERROR',
         self::TOO_MANY_ERROR => 'TOO_MANY_ERROR',
-    );
+    ];
 
     public $minMessage = 'This collection should contain {{ limit }} element or more.|This collection should contain {{ limit }} elements or more.';
     public $maxMessage = 'This collection should contain {{ limit }} element or less.|This collection should contain {{ limit }} elements or less.';
@@ -39,16 +39,16 @@ class Count extends Constraint
     public function __construct($options = null)
     {
         if (null !== $options && !\is_array($options)) {
-            $options = array(
+            $options = [
                 'min' => $options,
                 'max' => $options,
-            );
+            ];
         }
 
         parent::__construct($options);
 
         if (null === $this->min && null === $this->max) {
-            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), array('min', 'max'));
+            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), ['min', 'max']);
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Country.php b/src/Symfony/Component/Validator/Constraints/Country.php
index 435d12cd41..09e1996d5b 100644
--- a/src/Symfony/Component/Validator/Constraints/Country.php
+++ b/src/Symfony/Component/Validator/Constraints/Country.php
@@ -25,9 +25,9 @@ class Country extends Constraint
 {
     const NO_SUCH_COUNTRY_ERROR = '8f900c12-61bd-455d-9398-996cd040f7f0';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NO_SUCH_COUNTRY_ERROR => 'NO_SUCH_COUNTRY_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid country.';
 
diff --git a/src/Symfony/Component/Validator/Constraints/Currency.php b/src/Symfony/Component/Validator/Constraints/Currency.php
index 28e546d6b9..4f9d7d26fc 100644
--- a/src/Symfony/Component/Validator/Constraints/Currency.php
+++ b/src/Symfony/Component/Validator/Constraints/Currency.php
@@ -26,9 +26,9 @@ class Currency extends Constraint
 {
     const NO_SUCH_CURRENCY_ERROR = '69945ac1-2db4-405f-bec7-d2772f73df52';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NO_SUCH_CURRENCY_ERROR => 'NO_SUCH_CURRENCY_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid currency.';
 
diff --git a/src/Symfony/Component/Validator/Constraints/Date.php b/src/Symfony/Component/Validator/Constraints/Date.php
index 2563413122..530475ff7d 100644
--- a/src/Symfony/Component/Validator/Constraints/Date.php
+++ b/src/Symfony/Component/Validator/Constraints/Date.php
@@ -24,10 +24,10 @@ class Date extends Constraint
     const INVALID_FORMAT_ERROR = '69819696-02ac-4a99-9ff0-14e127c4d1bc';
     const INVALID_DATE_ERROR = '3c184ce5-b31d-4de7-8b76-326da7b2be93';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
         self::INVALID_DATE_ERROR => 'INVALID_DATE_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid date.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/DateTime.php b/src/Symfony/Component/Validator/Constraints/DateTime.php
index 0a29b66abf..b700bacd3f 100644
--- a/src/Symfony/Component/Validator/Constraints/DateTime.php
+++ b/src/Symfony/Component/Validator/Constraints/DateTime.php
@@ -25,11 +25,11 @@ class DateTime extends Constraint
     const INVALID_DATE_ERROR = 'd52afa47-620d-4d99-9f08-f4d85b36e33c';
     const INVALID_TIME_ERROR = '5e797c9d-74f7-4098-baa3-94390c447b27';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
         self::INVALID_DATE_ERROR => 'INVALID_DATE_ERROR',
         self::INVALID_TIME_ERROR => 'INVALID_TIME_ERROR',
-    );
+    ];
 
     public $format = 'Y-m-d H:i:s';
     public $message = 'This value is not a valid datetime.';
diff --git a/src/Symfony/Component/Validator/Constraints/DivisibleBy.php b/src/Symfony/Component/Validator/Constraints/DivisibleBy.php
index c438f273c0..e806a77b55 100644
--- a/src/Symfony/Component/Validator/Constraints/DivisibleBy.php
+++ b/src/Symfony/Component/Validator/Constraints/DivisibleBy.php
@@ -21,9 +21,9 @@ class DivisibleBy extends AbstractComparison
 {
     const NOT_DIVISIBLE_BY = '6d99d6c3-1464-4ccf-bdc7-14d083cf455c';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_DIVISIBLE_BY => 'NOT_DIVISIBLE_BY',
-    );
+    ];
 
     public $message = 'This value should be a multiple of {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Email.php b/src/Symfony/Component/Validator/Constraints/Email.php
index 260d213cd5..7d13eceaf7 100644
--- a/src/Symfony/Component/Validator/Constraints/Email.php
+++ b/src/Symfony/Component/Validator/Constraints/Email.php
@@ -39,22 +39,22 @@ class Email extends Constraint
      */
     const HOST_CHECK_FAILED_ERROR = '7da53a8b-56f3-4288-bb3e-ee9ede4ef9a1';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_FORMAT_ERROR => 'STRICT_CHECK_FAILED_ERROR',
         self::MX_CHECK_FAILED_ERROR => 'MX_CHECK_FAILED_ERROR',
         self::HOST_CHECK_FAILED_ERROR => 'HOST_CHECK_FAILED_ERROR',
-    );
+    ];
 
     /**
      * @var string[]
      *
      * @internal
      */
-    public static $validationModes = array(
+    public static $validationModes = [
         self::VALIDATION_MODE_HTML5,
         self::VALIDATION_MODE_STRICT,
         self::VALIDATION_MODE_LOOSE,
-    );
+    ];
 
     public $message = 'This value is not a valid email address.';
 
diff --git a/src/Symfony/Component/Validator/Constraints/EmailValidator.php b/src/Symfony/Component/Validator/Constraints/EmailValidator.php
index d79440a6d4..512695919d 100644
--- a/src/Symfony/Component/Validator/Constraints/EmailValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/EmailValidator.php
@@ -34,10 +34,10 @@ class EmailValidator extends ConstraintValidator
      */
     const PATTERN_LOOSE = '/^.+\@\S+\.\S+$/';
 
-    private static $emailPatterns = array(
+    private static $emailPatterns = [
         Email::VALIDATION_MODE_LOOSE => self::PATTERN_LOOSE,
         Email::VALIDATION_MODE_HTML5 => self::PATTERN_HTML5,
-    );
+    ];
 
     /**
      * @var string
diff --git a/src/Symfony/Component/Validator/Constraints/EqualTo.php b/src/Symfony/Component/Validator/Constraints/EqualTo.php
index 4b22c6dcca..ccd67675e7 100644
--- a/src/Symfony/Component/Validator/Constraints/EqualTo.php
+++ b/src/Symfony/Component/Validator/Constraints/EqualTo.php
@@ -22,9 +22,9 @@ class EqualTo extends AbstractComparison
 {
     const NOT_EQUAL_ERROR = '478618a7-95ba-473d-9101-cabd45e49115';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_EQUAL_ERROR => 'NOT_EQUAL_ERROR',
-    );
+    ];
 
     public $message = 'This value should be equal to {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Existence.php b/src/Symfony/Component/Validator/Constraints/Existence.php
index 5ea6ffe643..903cf63913 100644
--- a/src/Symfony/Component/Validator/Constraints/Existence.php
+++ b/src/Symfony/Component/Validator/Constraints/Existence.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Validator\Constraints;
  */
 abstract class Existence extends Composite
 {
-    public $constraints = array();
+    public $constraints = [];
 
     public function getDefaultOption()
     {
diff --git a/src/Symfony/Component/Validator/Constraints/Expression.php b/src/Symfony/Component/Validator/Constraints/Expression.php
index e48da16010..42e7248819 100644
--- a/src/Symfony/Component/Validator/Constraints/Expression.php
+++ b/src/Symfony/Component/Validator/Constraints/Expression.php
@@ -26,13 +26,13 @@ class Expression extends Constraint
 {
     const EXPRESSION_FAILED_ERROR = '6b3befbc-2f01-4ddf-be21-b57898905284';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::EXPRESSION_FAILED_ERROR => 'EXPRESSION_FAILED_ERROR',
-    );
+    ];
 
     public $message = 'This value is not valid.';
     public $expression;
-    public $values = array();
+    public $values = [];
 
     public function __construct($options = null)
     {
@@ -57,7 +57,7 @@ class Expression extends Constraint
      */
     public function getRequiredOptions()
     {
-        return array('expression');
+        return ['expression'];
     }
 
     /**
@@ -65,7 +65,7 @@ class Expression extends Constraint
      */
     public function getTargets()
     {
-        return array(self::CLASS_CONSTRAINT, self::PROPERTY_CONSTRAINT);
+        return [self::CLASS_CONSTRAINT, self::PROPERTY_CONSTRAINT];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/File.php b/src/Symfony/Component/Validator/Constraints/File.php
index 33215bb7b5..1f4e26bfcf 100644
--- a/src/Symfony/Component/Validator/Constraints/File.php
+++ b/src/Symfony/Component/Validator/Constraints/File.php
@@ -32,16 +32,16 @@ class File extends Constraint
     const TOO_LARGE_ERROR = 'df8637af-d466-48c6-a59d-e7126250a654';
     const INVALID_MIME_TYPE_ERROR = '744f00bc-4389-4c74-92de-9a43cde55534';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_FOUND_ERROR => 'NOT_FOUND_ERROR',
         self::NOT_READABLE_ERROR => 'NOT_READABLE_ERROR',
         self::EMPTY_ERROR => 'EMPTY_ERROR',
         self::TOO_LARGE_ERROR => 'TOO_LARGE_ERROR',
         self::INVALID_MIME_TYPE_ERROR => 'INVALID_MIME_TYPE_ERROR',
-    );
+    ];
 
     public $binaryFormat;
-    public $mimeTypes = array();
+    public $mimeTypes = [];
     public $notFoundMessage = 'The file could not be found.';
     public $notReadableMessage = 'The file is not readable.';
     public $maxSizeMessage = 'The file is too large ({{ size }} {{ suffix }}). Allowed maximum size is {{ limit }} {{ suffix }}.';
@@ -102,12 +102,12 @@ class File extends Constraint
 
     private function normalizeBinaryFormat($maxSize)
     {
-        $factors = array(
+        $factors = [
             'k' => 1000,
             'ki' => 1 << 10,
             'm' => 1000000,
             'mi' => 1 << 20,
-        );
+        ];
         if (ctype_digit((string) $maxSize)) {
             $this->maxSize = (int) $maxSize;
             $this->binaryFormat = null === $this->binaryFormat ? false : $this->binaryFormat;
diff --git a/src/Symfony/Component/Validator/Constraints/FileValidator.php b/src/Symfony/Component/Validator/Constraints/FileValidator.php
index 047254632b..7266669213 100644
--- a/src/Symfony/Component/Validator/Constraints/FileValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/FileValidator.php
@@ -28,13 +28,13 @@ class FileValidator extends ConstraintValidator
     const KIB_BYTES = 1024;
     const MIB_BYTES = 1048576;
 
-    private static $suffices = array(
+    private static $suffices = [
         1 => 'bytes',
         self::KB_BYTES => 'kB',
         self::MB_BYTES => 'MB',
         self::KIB_BYTES => 'KiB',
         self::MIB_BYTES => 'MiB',
-    );
+    ];
 
     /**
      * {@inheritdoc}
@@ -238,6 +238,6 @@ class FileValidator extends ConstraintValidator
             $sizeAsString = (string) round($size / $coef, 2);
         }
 
-        return array($sizeAsString, $limitAsString, self::$suffices[$coef]);
+        return [$sizeAsString, $limitAsString, self::$suffices[$coef]];
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/GreaterThan.php b/src/Symfony/Component/Validator/Constraints/GreaterThan.php
index c2ca2dcb82..ba225b44b6 100644
--- a/src/Symfony/Component/Validator/Constraints/GreaterThan.php
+++ b/src/Symfony/Component/Validator/Constraints/GreaterThan.php
@@ -22,9 +22,9 @@ class GreaterThan extends AbstractComparison
 {
     const TOO_LOW_ERROR = '778b7ae0-84d3-481a-9dec-35fdb64b1d78';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_LOW_ERROR => 'TOO_LOW_ERROR',
-    );
+    ];
 
     public $message = 'This value should be greater than {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/GreaterThanOrEqual.php b/src/Symfony/Component/Validator/Constraints/GreaterThanOrEqual.php
index 9b3743d073..2c88f3ad05 100644
--- a/src/Symfony/Component/Validator/Constraints/GreaterThanOrEqual.php
+++ b/src/Symfony/Component/Validator/Constraints/GreaterThanOrEqual.php
@@ -22,9 +22,9 @@ class GreaterThanOrEqual extends AbstractComparison
 {
     const TOO_LOW_ERROR = 'ea4e51d1-3342-48bd-87f1-9e672cd90cad';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_LOW_ERROR => 'TOO_LOW_ERROR',
-    );
+    ];
 
     public $message = 'This value should be greater than or equal to {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/GroupSequence.php b/src/Symfony/Component/Validator/Constraints/GroupSequence.php
index 1f6f512811..a39d712bf4 100644
--- a/src/Symfony/Component/Validator/Constraints/GroupSequence.php
+++ b/src/Symfony/Component/Validator/Constraints/GroupSequence.php
@@ -17,7 +17,7 @@ namespace Symfony\Component\Validator\Constraints;
  * When validating a group sequence, each group will only be validated if all
  * of the previous groups in the sequence succeeded. For example:
  *
- *     $validator->validate($address, null, new GroupSequence(array('Basic', 'Strict')));
+ *     $validator->validate($address, null, new GroupSequence(['Basic', 'Strict']));
  *
  * In the first step, all constraints that belong to the group "Basic" will be
  * validated. If none of the constraints fail, the validator will then validate
diff --git a/src/Symfony/Component/Validator/Constraints/Iban.php b/src/Symfony/Component/Validator/Constraints/Iban.php
index bcb30655aa..231f8c838d 100644
--- a/src/Symfony/Component/Validator/Constraints/Iban.php
+++ b/src/Symfony/Component/Validator/Constraints/Iban.php
@@ -29,13 +29,13 @@ class Iban extends Constraint
     const INVALID_FORMAT_ERROR = 'c8d318f1-2ecc-41ba-b983-df70d225cf5a';
     const NOT_SUPPORTED_COUNTRY_CODE_ERROR = 'e2c259f3-4b46-48e6-b72e-891658158ec8';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_COUNTRY_CODE_ERROR => 'INVALID_COUNTRY_CODE_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::CHECKSUM_FAILED_ERROR => 'CHECKSUM_FAILED_ERROR',
         self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
         self::NOT_SUPPORTED_COUNTRY_CODE_ERROR => 'NOT_SUPPORTED_COUNTRY_CODE_ERROR',
-    );
+    ];
 
     public $message = 'This is not a valid International Bank Account Number (IBAN).';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/IbanValidator.php b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
index 222ce57442..d6530ab101 100644
--- a/src/Symfony/Component/Validator/Constraints/IbanValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
@@ -36,7 +36,7 @@ class IbanValidator extends ConstraintValidator
      *
      * @see https://www.swift.com/sites/default/files/resources/iban_registry.pdf
      */
-    private static $formats = array(
+    private static $formats = [
         'AD' => 'AD\d{2}\d{4}\d{4}[\dA-Z]{12}', // Andorra
         'AE' => 'AE\d{2}\d{3}\d{16}', // United Arab Emirates
         'AL' => 'AL\d{2}\d{8}[\dA-Z]{16}', // Albania
@@ -135,7 +135,7 @@ class IbanValidator extends ConstraintValidator
         'WF' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Wallis and Futuna Islands
         'XK' => 'XK\d{2}\d{4}\d{10}\d{2}', // Republic of Kosovo
         'YT' => 'FR\d{2}\d{5}\d{5}[\dA-Z]{11}\d{2}', // Mayotte
-    );
+    ];
 
     /**
      * {@inheritdoc}
diff --git a/src/Symfony/Component/Validator/Constraints/IdenticalTo.php b/src/Symfony/Component/Validator/Constraints/IdenticalTo.php
index a7dadff833..6c1bc2b1d7 100644
--- a/src/Symfony/Component/Validator/Constraints/IdenticalTo.php
+++ b/src/Symfony/Component/Validator/Constraints/IdenticalTo.php
@@ -22,9 +22,9 @@ class IdenticalTo extends AbstractComparison
 {
     const NOT_IDENTICAL_ERROR = '2a8cc50f-58a2-4536-875e-060a2ce69ed5';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_IDENTICAL_ERROR => 'NOT_IDENTICAL_ERROR',
-    );
+    ];
 
     public $message = 'This value should be identical to {{ compared_value_type }} {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Image.php b/src/Symfony/Component/Validator/Constraints/Image.php
index c3c2c7a237..21005d9ea5 100644
--- a/src/Symfony/Component/Validator/Constraints/Image.php
+++ b/src/Symfony/Component/Validator/Constraints/Image.php
@@ -36,7 +36,7 @@ class Image extends File
 
     // Include the mapping from the base class
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_FOUND_ERROR => 'NOT_FOUND_ERROR',
         self::NOT_READABLE_ERROR => 'NOT_READABLE_ERROR',
         self::EMPTY_ERROR => 'EMPTY_ERROR',
@@ -55,7 +55,7 @@ class Image extends File
         self::LANDSCAPE_NOT_ALLOWED_ERROR => 'LANDSCAPE_NOT_ALLOWED_ERROR',
         self::PORTRAIT_NOT_ALLOWED_ERROR => 'PORTRAIT_NOT_ALLOWED_ERROR',
         self::CORRUPTED_IMAGE_ERROR => 'CORRUPTED_IMAGE_ERROR',
-    );
+    ];
 
     public $mimeTypes = 'image/*';
     public $minWidth;
diff --git a/src/Symfony/Component/Validator/Constraints/Ip.php b/src/Symfony/Component/Validator/Constraints/Ip.php
index f45c4caceb..aff99d4672 100644
--- a/src/Symfony/Component/Validator/Constraints/Ip.php
+++ b/src/Symfony/Component/Validator/Constraints/Ip.php
@@ -46,7 +46,7 @@ class Ip extends Constraint
 
     const INVALID_IP_ERROR = 'b1b427ae-9f6f-41b0-aa9b-84511fbb3c5b';
 
-    protected static $versions = array(
+    protected static $versions = [
         self::V4,
         self::V6,
         self::ALL,
@@ -62,11 +62,11 @@ class Ip extends Constraint
         self::V4_ONLY_PUBLIC,
         self::V6_ONLY_PUBLIC,
         self::ALL_ONLY_PUBLIC,
-    );
+    ];
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_IP_ERROR => 'INVALID_IP_ERROR',
-    );
+    ];
 
     public $version = self::V4;
 
diff --git a/src/Symfony/Component/Validator/Constraints/IsFalse.php b/src/Symfony/Component/Validator/Constraints/IsFalse.php
index 8332e1874f..d488c616dd 100644
--- a/src/Symfony/Component/Validator/Constraints/IsFalse.php
+++ b/src/Symfony/Component/Validator/Constraints/IsFalse.php
@@ -23,9 +23,9 @@ class IsFalse extends Constraint
 {
     const NOT_FALSE_ERROR = 'd53a91b0-def3-426a-83d7-269da7ab4200';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_FALSE_ERROR => 'NOT_FALSE_ERROR',
-    );
+    ];
 
     public $message = 'This value should be false.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/IsNull.php b/src/Symfony/Component/Validator/Constraints/IsNull.php
index fdd2930916..e010f9cf06 100644
--- a/src/Symfony/Component/Validator/Constraints/IsNull.php
+++ b/src/Symfony/Component/Validator/Constraints/IsNull.php
@@ -23,9 +23,9 @@ class IsNull extends Constraint
 {
     const NOT_NULL_ERROR = '60d2f30b-8cfa-4372-b155-9656634de120';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_NULL_ERROR => 'NOT_NULL_ERROR',
-    );
+    ];
 
     public $message = 'This value should be null.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/IsTrue.php b/src/Symfony/Component/Validator/Constraints/IsTrue.php
index 405a96a422..84f6ce15a7 100644
--- a/src/Symfony/Component/Validator/Constraints/IsTrue.php
+++ b/src/Symfony/Component/Validator/Constraints/IsTrue.php
@@ -23,9 +23,9 @@ class IsTrue extends Constraint
 {
     const NOT_TRUE_ERROR = '2beabf1c-54c0-4882-a928-05249b26e23b';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NOT_TRUE_ERROR => 'NOT_TRUE_ERROR',
-    );
+    ];
 
     public $message = 'This value should be true.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Isbn.php b/src/Symfony/Component/Validator/Constraints/Isbn.php
index 615feb6641..6629c823e1 100644
--- a/src/Symfony/Component/Validator/Constraints/Isbn.php
+++ b/src/Symfony/Component/Validator/Constraints/Isbn.php
@@ -29,13 +29,13 @@ class Isbn extends Constraint
     const CHECKSUM_FAILED_ERROR = '2881c032-660f-46b6-8153-d352d9706640';
     const TYPE_NOT_RECOGNIZED_ERROR = 'fa54a457-f042-441f-89c4-066ee5bdd3e1';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_SHORT_ERROR => 'TOO_SHORT_ERROR',
         self::TOO_LONG_ERROR => 'TOO_LONG_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::CHECKSUM_FAILED_ERROR => 'CHECKSUM_FAILED_ERROR',
         self::TYPE_NOT_RECOGNIZED_ERROR => 'TYPE_NOT_RECOGNIZED_ERROR',
-    );
+    ];
 
     public $isbn10Message = 'This value is not a valid ISBN-10.';
     public $isbn13Message = 'This value is not a valid ISBN-13.';
diff --git a/src/Symfony/Component/Validator/Constraints/Issn.php b/src/Symfony/Component/Validator/Constraints/Issn.php
index a2fecdd35c..88d181fa63 100644
--- a/src/Symfony/Component/Validator/Constraints/Issn.php
+++ b/src/Symfony/Component/Validator/Constraints/Issn.php
@@ -29,14 +29,14 @@ class Issn extends Constraint
     const INVALID_CASE_ERROR = '7b6dd393-7523-4a6c-b84d-72b91bba5e1a';
     const CHECKSUM_FAILED_ERROR = 'b0f92dbc-667c-48de-b526-ad9586d43e85';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_SHORT_ERROR => 'TOO_SHORT_ERROR',
         self::TOO_LONG_ERROR => 'TOO_LONG_ERROR',
         self::MISSING_HYPHEN_ERROR => 'MISSING_HYPHEN_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::INVALID_CASE_ERROR => 'INVALID_CASE_ERROR',
         self::CHECKSUM_FAILED_ERROR => 'CHECKSUM_FAILED_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid ISSN.';
     public $caseSensitive = false;
diff --git a/src/Symfony/Component/Validator/Constraints/Language.php b/src/Symfony/Component/Validator/Constraints/Language.php
index f24d1e0b97..ce01bba15f 100644
--- a/src/Symfony/Component/Validator/Constraints/Language.php
+++ b/src/Symfony/Component/Validator/Constraints/Language.php
@@ -25,9 +25,9 @@ class Language extends Constraint
 {
     const NO_SUCH_LANGUAGE_ERROR = 'ee65fec4-9a20-4202-9f39-ca558cd7bdf7';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NO_SUCH_LANGUAGE_ERROR => 'NO_SUCH_LANGUAGE_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid language.';
 
diff --git a/src/Symfony/Component/Validator/Constraints/Length.php b/src/Symfony/Component/Validator/Constraints/Length.php
index 20a17fabca..79aa473204 100644
--- a/src/Symfony/Component/Validator/Constraints/Length.php
+++ b/src/Symfony/Component/Validator/Constraints/Length.php
@@ -26,11 +26,11 @@ class Length extends Constraint
     const TOO_LONG_ERROR = 'd94b19cc-114f-4f44-9cc4-4138e80a87b9';
     const INVALID_CHARACTERS_ERROR = '35e6a710-aa2e-4719-b58e-24b35749b767';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_SHORT_ERROR => 'TOO_SHORT_ERROR',
         self::TOO_LONG_ERROR => 'TOO_LONG_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
-    );
+    ];
 
     public $maxMessage = 'This value is too long. It should have {{ limit }} character or less.|This value is too long. It should have {{ limit }} characters or less.';
     public $minMessage = 'This value is too short. It should have {{ limit }} character or more.|This value is too short. It should have {{ limit }} characters or more.';
@@ -43,16 +43,16 @@ class Length extends Constraint
     public function __construct($options = null)
     {
         if (null !== $options && !\is_array($options)) {
-            $options = array(
+            $options = [
                 'min' => $options,
                 'max' => $options,
-            );
+            ];
         }
 
         parent::__construct($options);
 
         if (null === $this->min && null === $this->max) {
-            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), array('min', 'max'));
+            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), ['min', 'max']);
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/LessThan.php b/src/Symfony/Component/Validator/Constraints/LessThan.php
index 1bbb50878b..8ea07ace2e 100644
--- a/src/Symfony/Component/Validator/Constraints/LessThan.php
+++ b/src/Symfony/Component/Validator/Constraints/LessThan.php
@@ -22,9 +22,9 @@ class LessThan extends AbstractComparison
 {
     const TOO_HIGH_ERROR = '079d7420-2d13-460c-8756-de810eeb37d2';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_HIGH_ERROR => 'TOO_HIGH_ERROR',
-    );
+    ];
 
     public $message = 'This value should be less than {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/LessThanOrEqual.php b/src/Symfony/Component/Validator/Constraints/LessThanOrEqual.php
index d118942385..74f7aeb8fa 100644
--- a/src/Symfony/Component/Validator/Constraints/LessThanOrEqual.php
+++ b/src/Symfony/Component/Validator/Constraints/LessThanOrEqual.php
@@ -22,9 +22,9 @@ class LessThanOrEqual extends AbstractComparison
 {
     const TOO_HIGH_ERROR = '079d7420-2d13-460c-8756-de810eeb37d2';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_HIGH_ERROR => 'TOO_HIGH_ERROR',
-    );
+    ];
 
     public $message = 'This value should be less than or equal to {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Locale.php b/src/Symfony/Component/Validator/Constraints/Locale.php
index e2c780c15d..0e4ccf69ce 100644
--- a/src/Symfony/Component/Validator/Constraints/Locale.php
+++ b/src/Symfony/Component/Validator/Constraints/Locale.php
@@ -25,9 +25,9 @@ class Locale extends Constraint
 {
     const NO_SUCH_LOCALE_ERROR = 'a0af4293-1f1a-4a1c-a328-979cba6182a2';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::NO_SUCH_LOCALE_ERROR => 'NO_SUCH_LOCALE_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid locale.';
     public $canonicalize = false;
diff --git a/src/Symfony/Component/Validator/Constraints/Luhn.php b/src/Symfony/Component/Validator/Constraints/Luhn.php
index 67f152d29d..85eebc793b 100644
--- a/src/Symfony/Component/Validator/Constraints/Luhn.php
+++ b/src/Symfony/Component/Validator/Constraints/Luhn.php
@@ -28,10 +28,10 @@ class Luhn extends Constraint
     const INVALID_CHARACTERS_ERROR = 'dfad6d23-1b74-4374-929b-5cbb56fc0d9e';
     const CHECKSUM_FAILED_ERROR = '4d760774-3f50-4cd5-a6d5-b10a3299d8d3';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::CHECKSUM_FAILED_ERROR => 'CHECKSUM_FAILED_ERROR',
-    );
+    ];
 
     public $message = 'Invalid card number.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/NotBlank.php b/src/Symfony/Component/Validator/Constraints/NotBlank.php
index e059f1028a..7616c426c7 100644
--- a/src/Symfony/Component/Validator/Constraints/NotBlank.php
+++ b/src/Symfony/Component/Validator/Constraints/NotBlank.php
@@ -23,9 +23,9 @@ class NotBlank extends Constraint
 {
     const IS_BLANK_ERROR = 'c1051bb4-d103-4f74-8988-acbcafc7fdc3';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::IS_BLANK_ERROR => 'IS_BLANK_ERROR',
-    );
+    ];
 
     public $message = 'This value should not be blank.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/NotEqualTo.php b/src/Symfony/Component/Validator/Constraints/NotEqualTo.php
index 8c5abddaee..a04f3a9b6c 100644
--- a/src/Symfony/Component/Validator/Constraints/NotEqualTo.php
+++ b/src/Symfony/Component/Validator/Constraints/NotEqualTo.php
@@ -22,9 +22,9 @@ class NotEqualTo extends AbstractComparison
 {
     const IS_EQUAL_ERROR = 'aa2e33da-25c8-4d76-8c6c-812f02ea89dd';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::IS_EQUAL_ERROR => 'IS_EQUAL_ERROR',
-    );
+    ];
 
     public $message = 'This value should not be equal to {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/NotIdenticalTo.php b/src/Symfony/Component/Validator/Constraints/NotIdenticalTo.php
index 4c9c63ea61..972e4a103c 100644
--- a/src/Symfony/Component/Validator/Constraints/NotIdenticalTo.php
+++ b/src/Symfony/Component/Validator/Constraints/NotIdenticalTo.php
@@ -22,9 +22,9 @@ class NotIdenticalTo extends AbstractComparison
 {
     const IS_IDENTICAL_ERROR = '4aaac518-0dda-4129-a6d9-e216b9b454a0';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::IS_IDENTICAL_ERROR => 'IS_IDENTICAL_ERROR',
-    );
+    ];
 
     public $message = 'This value should not be identical to {{ compared_value_type }} {{ compared_value }}.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/NotNull.php b/src/Symfony/Component/Validator/Constraints/NotNull.php
index 1cfc1c80ec..a392104d0e 100644
--- a/src/Symfony/Component/Validator/Constraints/NotNull.php
+++ b/src/Symfony/Component/Validator/Constraints/NotNull.php
@@ -23,9 +23,9 @@ class NotNull extends Constraint
 {
     const IS_NULL_ERROR = 'ad32d13f-c3d4-423b-909a-857b961eb720';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::IS_NULL_ERROR => 'IS_NULL_ERROR',
-    );
+    ];
 
     public $message = 'This value should not be null.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Range.php b/src/Symfony/Component/Validator/Constraints/Range.php
index dcaf9db955..65ece5d832 100644
--- a/src/Symfony/Component/Validator/Constraints/Range.php
+++ b/src/Symfony/Component/Validator/Constraints/Range.php
@@ -26,11 +26,11 @@ class Range extends Constraint
     const TOO_HIGH_ERROR = '2d28afcb-e32e-45fb-a815-01c431a86a69';
     const TOO_LOW_ERROR = '76454e69-502c-46c5-9643-f447d837c4d5';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::TOO_HIGH_ERROR => 'TOO_HIGH_ERROR',
         self::TOO_LOW_ERROR => 'TOO_LOW_ERROR',
-    );
+    ];
 
     public $minMessage = 'This value should be {{ limit }} or more.';
     public $maxMessage = 'This value should be {{ limit }} or less.';
@@ -43,7 +43,7 @@ class Range extends Constraint
         parent::__construct($options);
 
         if (null === $this->min && null === $this->max) {
-            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), array('min', 'max'));
+            throw new MissingOptionsException(sprintf('Either option "min" or "max" must be given for constraint %s', __CLASS__), ['min', 'max']);
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Regex.php b/src/Symfony/Component/Validator/Constraints/Regex.php
index cb12210225..a71e4de259 100644
--- a/src/Symfony/Component/Validator/Constraints/Regex.php
+++ b/src/Symfony/Component/Validator/Constraints/Regex.php
@@ -23,9 +23,9 @@ class Regex extends Constraint
 {
     const REGEX_FAILED_ERROR = 'de1e3db3-5ed4-4941-aae4-59f3667cc3a3';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::REGEX_FAILED_ERROR => 'REGEX_FAILED_ERROR',
-    );
+    ];
 
     public $message = 'This value is not valid.';
     public $pattern;
@@ -45,7 +45,7 @@ class Regex extends Constraint
      */
     public function getRequiredOptions()
     {
-        return array('pattern');
+        return ['pattern'];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/Time.php b/src/Symfony/Component/Validator/Constraints/Time.php
index 6bd8dbda2e..d1a3397b24 100644
--- a/src/Symfony/Component/Validator/Constraints/Time.php
+++ b/src/Symfony/Component/Validator/Constraints/Time.php
@@ -24,10 +24,10 @@ class Time extends Constraint
     const INVALID_FORMAT_ERROR = '9d27b2bb-f755-4fbf-b725-39b1edbdebdf';
     const INVALID_TIME_ERROR = '8532f9e1-84b2-4d67-8989-0818bc38533b';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_FORMAT_ERROR => 'INVALID_FORMAT_ERROR',
         self::INVALID_TIME_ERROR => 'INVALID_TIME_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid time.';
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Type.php b/src/Symfony/Component/Validator/Constraints/Type.php
index e40b47820d..ac798bcd44 100644
--- a/src/Symfony/Component/Validator/Constraints/Type.php
+++ b/src/Symfony/Component/Validator/Constraints/Type.php
@@ -23,9 +23,9 @@ class Type extends Constraint
 {
     const INVALID_TYPE_ERROR = 'ba785a8c-82cb-4283-967c-3cf342181b40';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_TYPE_ERROR => 'INVALID_TYPE_ERROR',
-    );
+    ];
 
     public $message = 'This value should be of type {{ type }}.';
     public $type;
@@ -43,6 +43,6 @@ class Type extends Constraint
      */
     public function getRequiredOptions()
     {
-        return array('type');
+        return ['type'];
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/Url.php b/src/Symfony/Component/Validator/Constraints/Url.php
index abedcf29d9..2a237bffad 100644
--- a/src/Symfony/Component/Validator/Constraints/Url.php
+++ b/src/Symfony/Component/Validator/Constraints/Url.php
@@ -88,9 +88,9 @@ class Url extends Constraint
 
     const INVALID_URL_ERROR = '57c2f299-1154-4870-89bb-ef3b1f5ad229';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::INVALID_URL_ERROR => 'INVALID_URL_ERROR',
-    );
+    ];
 
     public $message = 'This value is not a valid URL.';
 
@@ -98,7 +98,7 @@ class Url extends Constraint
      * @deprecated since Symfony 4.1
      */
     public $dnsMessage = 'The host could not be resolved.';
-    public $protocols = array('http', 'https');
+    public $protocols = ['http', 'https'];
 
     /**
      * @deprecated since Symfony 4.1
diff --git a/src/Symfony/Component/Validator/Constraints/UrlValidator.php b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
index 2f7db08054..20d8ded870 100644
--- a/src/Symfony/Component/Validator/Constraints/UrlValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/UrlValidator.php
@@ -75,7 +75,7 @@ class UrlValidator extends ConstraintValidator
         }
 
         if ($constraint->checkDNS) {
-            if (!\in_array($constraint->checkDNS, array(
+            if (!\in_array($constraint->checkDNS, [
                 Url::CHECK_DNS_TYPE_ANY,
                 Url::CHECK_DNS_TYPE_A,
                 Url::CHECK_DNS_TYPE_A6,
@@ -88,8 +88,8 @@ class UrlValidator extends ConstraintValidator
                 Url::CHECK_DNS_TYPE_SOA,
                 Url::CHECK_DNS_TYPE_SRV,
                 Url::CHECK_DNS_TYPE_TXT,
-            ), true)) {
-                throw new InvalidOptionsException(sprintf('Invalid value for option "checkDNS" in constraint %s', \get_class($constraint)), array('checkDNS'));
+            ], true)) {
+                throw new InvalidOptionsException(sprintf('Invalid value for option "checkDNS" in constraint %s', \get_class($constraint)), ['checkDNS']);
             }
 
             $host = parse_url($value, PHP_URL_HOST);
diff --git a/src/Symfony/Component/Validator/Constraints/Uuid.php b/src/Symfony/Component/Validator/Constraints/Uuid.php
index 2deecbadd6..988f3c3b2d 100644
--- a/src/Symfony/Component/Validator/Constraints/Uuid.php
+++ b/src/Symfony/Component/Validator/Constraints/Uuid.php
@@ -28,14 +28,14 @@ class Uuid extends Constraint
     const INVALID_VERSION_ERROR = '21ba13b4-b185-4882-ac6f-d147355987eb';
     const INVALID_VARIANT_ERROR = '164ef693-2b9d-46de-ad7f-836201f0c2db';
 
-    protected static $errorNames = array(
+    protected static $errorNames = [
         self::TOO_SHORT_ERROR => 'TOO_SHORT_ERROR',
         self::TOO_LONG_ERROR => 'TOO_LONG_ERROR',
         self::INVALID_CHARACTERS_ERROR => 'INVALID_CHARACTERS_ERROR',
         self::INVALID_HYPHEN_PLACEMENT_ERROR => 'INVALID_HYPHEN_PLACEMENT_ERROR',
         self::INVALID_VERSION_ERROR => 'INVALID_VERSION_ERROR',
         self::INVALID_VARIANT_ERROR => 'INVALID_VARIANT_ERROR',
-    );
+    ];
 
     // Possible versions defined by RFC 4122
     const V1_MAC = 1;
@@ -67,11 +67,11 @@ class Uuid extends Constraint
      *
      * @var int[]
      */
-    public $versions = array(
+    public $versions = [
         self::V1_MAC,
         self::V2_DCE,
         self::V3_MD5,
         self::V4_RANDOM,
         self::V5_SHA1,
-    );
+    ];
 }
diff --git a/src/Symfony/Component/Validator/Constraints/ValidValidator.php b/src/Symfony/Component/Validator/Constraints/ValidValidator.php
index be5fbc1266..cc10ec5204 100644
--- a/src/Symfony/Component/Validator/Constraints/ValidValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ValidValidator.php
@@ -33,6 +33,6 @@ class ValidValidator extends ConstraintValidator
         $this->context
             ->getValidator()
             ->inContext($this->context)
-            ->validate($value, null, array($this->context->getGroup()));
+            ->validate($value, null, [$this->context->getGroup()]);
     }
 }
diff --git a/src/Symfony/Component/Validator/Context/ExecutionContext.php b/src/Symfony/Component/Validator/Context/ExecutionContext.php
index fd9d9605e0..c97773e536 100644
--- a/src/Symfony/Component/Validator/Context/ExecutionContext.php
+++ b/src/Symfony/Component/Validator/Context/ExecutionContext.php
@@ -111,14 +111,14 @@ class ExecutionContext implements ExecutionContextInterface
      *
      * @var array
      */
-    private $validatedObjects = array();
+    private $validatedObjects = [];
 
     /**
      * Stores which class constraint has been validated for which object.
      *
      * @var array
      */
-    private $validatedConstraints = array();
+    private $validatedConstraints = [];
 
     /**
      * Stores which objects have been initialized.
@@ -183,7 +183,7 @@ class ExecutionContext implements ExecutionContextInterface
     /**
      * {@inheritdoc}
      */
-    public function addViolation($message, array $parameters = array())
+    public function addViolation($message, array $parameters = [])
     {
         $this->violations->add(new ConstraintViolation(
             $this->translator->trans($message, $parameters, $this->translationDomain),
@@ -201,7 +201,7 @@ class ExecutionContext implements ExecutionContextInterface
     /**
      * {@inheritdoc}
      */
-    public function buildViolation($message, array $parameters = array())
+    public function buildViolation($message, array $parameters = [])
     {
         return new ConstraintViolationBuilder(
             $this->violations,
@@ -307,7 +307,7 @@ class ExecutionContext implements ExecutionContextInterface
     public function markGroupAsValidated($cacheKey, $groupHash)
     {
         if (!isset($this->validatedObjects[$cacheKey])) {
-            $this->validatedObjects[$cacheKey] = array();
+            $this->validatedObjects[$cacheKey] = [];
         }
 
         $this->validatedObjects[$cacheKey][$groupHash] = true;
diff --git a/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php b/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
index e4f7df1757..2ab625b156 100644
--- a/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
+++ b/src/Symfony/Component/Validator/Context/ExecutionContextInterface.php
@@ -67,7 +67,7 @@ interface ExecutionContextInterface
      * @param string $message The error message
      * @param array  $params  The parameters substituted in the error message
      */
-    public function addViolation($message, array $params = array());
+    public function addViolation($message, array $params = []);
 
     /**
      * Returns a builder for adding a violation with extended information.
@@ -86,7 +86,7 @@ interface ExecutionContextInterface
      *
      * @return ConstraintViolationBuilderInterface The violation builder
      */
-    public function buildViolation($message, array $parameters = array());
+    public function buildViolation($message, array $parameters = []);
 
     /**
      * Returns the validator.
@@ -97,7 +97,7 @@ interface ExecutionContextInterface
      *     {
      *         $validator = $this->context->getValidator();
      *
-     *         $violations = $validator->validate($value, new Length(array('min' => 3)));
+     *         $violations = $validator->validate($value, new Length(['min' => 3]));
      *
      *         if (count($violations) > 0) {
      *             // ...
diff --git a/src/Symfony/Component/Validator/DataCollector/ValidatorDataCollector.php b/src/Symfony/Component/Validator/DataCollector/ValidatorDataCollector.php
index f7165e5fbd..999a9968b0 100644
--- a/src/Symfony/Component/Validator/DataCollector/ValidatorDataCollector.php
+++ b/src/Symfony/Component/Validator/DataCollector/ValidatorDataCollector.php
@@ -45,10 +45,10 @@ class ValidatorDataCollector extends DataCollector implements LateDataCollectorI
 
     public function reset()
     {
-        $this->data = array(
-            'calls' => $this->cloneVar(array()),
+        $this->data = [
+            'calls' => $this->cloneVar([]),
             'violations_count' => 0,
-        );
+        ];
     }
 
     /**
@@ -89,9 +89,9 @@ class ValidatorDataCollector extends DataCollector implements LateDataCollectorI
 
     protected function getCasters()
     {
-        return parent::getCasters() + array(
+        return parent::getCasters() + [
             \Exception::class => function (\Exception $e, array $a, Stub $s) {
-                foreach (array("\0Exception\0previous", "\0Exception\0trace") as $k) {
+                foreach (["\0Exception\0previous", "\0Exception\0trace"] as $k) {
                     if (isset($a[$k])) {
                         unset($a[$k]);
                         ++$s->cut;
@@ -101,12 +101,12 @@ class ValidatorDataCollector extends DataCollector implements LateDataCollectorI
                 return $a;
             },
             FormInterface::class => function (FormInterface $f, array $a) {
-                return array(
+                return [
                     Caster::PREFIX_VIRTUAL.'name' => $f->getName(),
                     Caster::PREFIX_VIRTUAL.'type_class' => new ClassStub(\get_class($f->getConfig()->getType()->getInnerType())),
                     Caster::PREFIX_VIRTUAL.'data' => $f->getData(),
-                );
+                ];
             },
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/DependencyInjection/AddConstraintValidatorsPass.php b/src/Symfony/Component/Validator/DependencyInjection/AddConstraintValidatorsPass.php
index 589eb5368b..42636a3379 100644
--- a/src/Symfony/Component/Validator/DependencyInjection/AddConstraintValidatorsPass.php
+++ b/src/Symfony/Component/Validator/DependencyInjection/AddConstraintValidatorsPass.php
@@ -37,7 +37,7 @@ class AddConstraintValidatorsPass implements CompilerPassInterface
             return;
         }
 
-        $validators = array();
+        $validators = [];
         foreach ($container->findTaggedServiceIds($this->constraintValidatorTag, true) as $id => $attributes) {
             $definition = $container->getDefinition($id);
 
diff --git a/src/Symfony/Component/Validator/DependencyInjection/AddValidatorInitializersPass.php b/src/Symfony/Component/Validator/DependencyInjection/AddValidatorInitializersPass.php
index 4539e27bd3..dcc02ca694 100644
--- a/src/Symfony/Component/Validator/DependencyInjection/AddValidatorInitializersPass.php
+++ b/src/Symfony/Component/Validator/DependencyInjection/AddValidatorInitializersPass.php
@@ -40,16 +40,16 @@ class AddValidatorInitializersPass implements CompilerPassInterface
             return;
         }
 
-        $initializers = array();
+        $initializers = [];
         foreach ($container->findTaggedServiceIds($this->initializerTag, true) as $id => $attributes) {
             $initializers[] = new Reference($id);
         }
 
-        $container->getDefinition($this->builderService)->addMethodCall('addObjectInitializers', array($initializers));
+        $container->getDefinition($this->builderService)->addMethodCall('addObjectInitializers', [$initializers]);
 
         // @deprecated logic, to be removed in Symfony 5.0
         $builder = $container->getDefinition($this->builderService);
-        $calls = array();
+        $calls = [];
 
         foreach ($builder->getMethodCalls() as list($method, $arguments)) {
             if ('setTranslator' === $method) {
@@ -70,7 +70,7 @@ class AddValidatorInitializersPass implements CompilerPassInterface
                 }
             }
 
-            $calls[] = array($method, $arguments);
+            $calls[] = [$method, $arguments];
         }
 
         $builder->setMethodCalls($calls);
diff --git a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
index 7b616eb7aa..afbe72b735 100644
--- a/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/ClassMetadata.php
@@ -53,7 +53,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getPropertyMetadata()} instead.
      */
-    public $members = array();
+    public $members = [];
 
     /**
      * @var PropertyMetadata[]
@@ -62,7 +62,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getPropertyMetadata()} instead.
      */
-    public $properties = array();
+    public $properties = [];
 
     /**
      * @var GetterMetadata[]
@@ -71,7 +71,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getPropertyMetadata()} instead.
      */
-    public $getters = array();
+    public $getters = [];
 
     /**
      * @var array
@@ -80,7 +80,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getGroupSequence()} instead.
      */
-    public $groupSequence = array();
+    public $groupSequence = [];
 
     /**
      * @var bool
@@ -130,7 +130,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
         // Don't store the cascading strategy. Classes never cascade.
         unset($parentProperties[array_search('cascadingStrategy', $parentProperties)]);
 
-        return array_merge($parentProperties, array(
+        return array_merge($parentProperties, [
             'getters',
             'groupSequence',
             'groupSequenceProvider',
@@ -138,7 +138,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
             'name',
             'properties',
             'defaultGroup',
-        ));
+        ]);
     }
 
     /**
@@ -375,7 +375,7 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
     public function getPropertyMetadata($property)
     {
         if (!isset($this->members[$property])) {
-            return array();
+            return [];
         }
 
         return $this->members[$property];
diff --git a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
index 33a0324940..7a5da0e201 100644
--- a/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
+++ b/src/Symfony/Component/Validator/Mapping/Factory/LazyLoadingMetadataFactory.php
@@ -46,7 +46,7 @@ class LazyLoadingMetadataFactory implements MetadataFactoryInterface
      *
      * @var ClassMetadata[]
      */
-    protected $loadedClasses = array();
+    protected $loadedClasses = [];
 
     /**
      * Creates a new metadata factory.
diff --git a/src/Symfony/Component/Validator/Mapping/GenericMetadata.php b/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
index a5364f9b08..139d252fc0 100644
--- a/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/GenericMetadata.php
@@ -32,7 +32,7 @@ class GenericMetadata implements MetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link getConstraints()} and {@link findConstraints()} instead.
      */
-    public $constraints = array();
+    public $constraints = [];
 
     /**
      * @var array
@@ -41,7 +41,7 @@ class GenericMetadata implements MetadataInterface
      *           class' serialized representation. Do not access it. Use
      *           {@link findConstraints()} instead.
      */
-    public $constraintsByGroup = array();
+    public $constraintsByGroup = [];
 
     /**
      * The strategy for cascading objects.
@@ -80,12 +80,12 @@ class GenericMetadata implements MetadataInterface
      */
     public function __sleep()
     {
-        return array(
+        return [
             'constraints',
             'constraintsByGroup',
             'cascadingStrategy',
             'traversalStrategy',
-        );
+        ];
     }
 
     /**
@@ -95,8 +95,8 @@ class GenericMetadata implements MetadataInterface
     {
         $constraints = $this->constraints;
 
-        $this->constraints = array();
-        $this->constraintsByGroup = array();
+        $this->constraints = [];
+        $this->constraintsByGroup = [];
 
         foreach ($constraints as $constraint) {
             $this->addConstraint(clone $constraint);
@@ -189,7 +189,7 @@ class GenericMetadata implements MetadataInterface
     {
         return isset($this->constraintsByGroup[$group])
             ? $this->constraintsByGroup[$group]
-            : array();
+            : [];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/AbstractLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/AbstractLoader.php
index 9d92de348a..ae2e1e04cd 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/AbstractLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/AbstractLoader.php
@@ -32,7 +32,7 @@ abstract class AbstractLoader implements LoaderInterface
      */
     const DEFAULT_NAMESPACE = '\\Symfony\\Component\\Validator\\Constraints\\';
 
-    protected $namespaces = array();
+    protected $namespaces = [];
 
     /**
      * Adds a namespace alias.
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/FilesLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/FilesLoader.php
index 571c7e7abb..0882c3932f 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/FilesLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/FilesLoader.php
@@ -41,7 +41,7 @@ abstract class FilesLoader extends LoaderChain
      */
     protected function getFileLoaders($paths)
     {
-        $loaders = array();
+        $loaders = [];
 
         foreach ($paths as $path) {
             $loaders[] = $this->getFileLoaderInstance($path);
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
index 398d81e936..cec3ea6c2d 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/XmlFileLoader.php
@@ -72,7 +72,7 @@ class XmlFileLoader extends FileLoader
      */
     protected function parseConstraints(\SimpleXMLElement $nodes)
     {
-        $constraints = array();
+        $constraints = [];
 
         foreach ($nodes as $node) {
             if (\count($node) > 0) {
@@ -83,7 +83,7 @@ class XmlFileLoader extends FileLoader
                 } elseif (\count($node->option) > 0) {
                     $options = $this->parseOptions($node->option);
                 } else {
-                    $options = array();
+                    $options = [];
                 }
             } elseif (\strlen((string) $node) > 0) {
                 $options = XmlUtils::phpize(trim($node));
@@ -106,7 +106,7 @@ class XmlFileLoader extends FileLoader
      */
     protected function parseValues(\SimpleXMLElement $nodes)
     {
-        $values = array();
+        $values = [];
 
         foreach ($nodes as $node) {
             if (\count($node) > 0) {
@@ -115,7 +115,7 @@ class XmlFileLoader extends FileLoader
                 } elseif (\count($node->constraint) > 0) {
                     $value = $this->parseConstraints($node->constraint);
                 } else {
-                    $value = array();
+                    $value = [];
                 }
             } else {
                 $value = trim($node);
@@ -140,7 +140,7 @@ class XmlFileLoader extends FileLoader
      */
     protected function parseOptions(\SimpleXMLElement $nodes)
     {
-        $options = array();
+        $options = [];
 
         foreach ($nodes as $node) {
             if (\count($node) > 0) {
@@ -149,7 +149,7 @@ class XmlFileLoader extends FileLoader
                 } elseif (\count($node->constraint) > 0) {
                     $value = $this->parseConstraints($node->constraint);
                 } else {
-                    $value = array();
+                    $value = [];
                 }
             } else {
                 $value = XmlUtils::phpize($node);
@@ -190,7 +190,7 @@ class XmlFileLoader extends FileLoader
         // state before it completes
         $xml = $this->parseFile($this->file);
 
-        $this->classes = array();
+        $this->classes = [];
 
         foreach ($xml->namespace as $namespace) {
             $this->addNamespaceAlias((string) $namespace['prefix'], trim((string) $namespace));
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php b/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
index 54e969c022..58b34dbcb7 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Validator/Mapping/Loader/YamlFileLoader.php
@@ -80,7 +80,7 @@ class YamlFileLoader extends FileLoader
      */
     protected function parseNodes(array $nodes)
     {
-        $values = array();
+        $values = [];
 
         foreach ($nodes as $name => $childNodes) {
             if (is_numeric($name) && \is_array($childNodes) && 1 === \count($childNodes)) {
@@ -123,7 +123,7 @@ class YamlFileLoader extends FileLoader
 
         // empty file
         if (null === $classes) {
-            return array();
+            return [];
         }
 
         // not an array
diff --git a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
index 9986eaca94..dbf1d44562 100644
--- a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
@@ -52,7 +52,7 @@ abstract class MemberMetadata extends GenericMetadata implements PropertyMetadat
     /**
      * @var \ReflectionMethod[]|\ReflectionProperty[]
      */
-    private $reflMember = array();
+    private $reflMember = [];
 
     /**
      * @param string $class    The name of the class this member is defined on
@@ -85,11 +85,11 @@ abstract class MemberMetadata extends GenericMetadata implements PropertyMetadat
      */
     public function __sleep()
     {
-        return array_merge(parent::__sleep(), array(
+        return array_merge(parent::__sleep(), [
             'class',
             'name',
             'property',
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php b/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
index 60a1cbde0a..cbe5709767 100644
--- a/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
+++ b/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
@@ -176,7 +176,7 @@ abstract class ConstraintValidatorTestCase extends TestCase
             ->will($this->returnValue($validator));
         $validator->expects($this->at(2 * $i + 1))
             ->method('validate')
-            ->with($value, $this->logicalOr(null, array(), $this->isInstanceOf('\Symfony\Component\Validator\Constraints\Valid')), $group);
+            ->with($value, $this->logicalOr(null, [], $this->isInstanceOf('\Symfony\Component\Validator\Constraints\Valid')), $group);
     }
 
     protected function expectValidateValueAt($i, $propertyPath, $value, $constraints, $group = null)
@@ -225,7 +225,7 @@ class ConstraintViolationAssertion
     private $assertions;
 
     private $message;
-    private $parameters = array();
+    private $parameters = [];
     private $invalidValue = 'InvalidValue';
     private $propertyPath = 'property.path';
     private $plural;
@@ -233,7 +233,7 @@ class ConstraintViolationAssertion
     private $constraint;
     private $cause;
 
-    public function __construct(ExecutionContextInterface $context, $message, Constraint $constraint = null, array $assertions = array())
+    public function __construct(ExecutionContextInterface $context, $message, Constraint $constraint = null, array $assertions = [])
     {
         $this->context = $context;
         $this->message = $message;
@@ -307,7 +307,7 @@ class ConstraintViolationAssertion
 
     public function assertRaised()
     {
-        $expected = array();
+        $expected = [];
         foreach ($this->assertions as $assertion) {
             $expected[] = $assertion->getViolation();
         }
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintTest.php b/src/Symfony/Component/Validator/Tests/ConstraintTest.php
index 7c21d601ae..d845fc2935 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintTest.php
@@ -24,10 +24,10 @@ class ConstraintTest extends TestCase
 {
     public function testSetProperties()
     {
-        $constraint = new ConstraintA(array(
+        $constraint = new ConstraintA([
             'property1' => 'foo',
             'property2' => 'bar',
-        ));
+        ]);
 
         $this->assertEquals('foo', $constraint->property1);
         $this->assertEquals('bar', $constraint->property2);
@@ -37,9 +37,9 @@ class ConstraintTest extends TestCase
     {
         $this->expectException('Symfony\Component\Validator\Exception\InvalidOptionsException');
 
-        new ConstraintA(array(
+        new ConstraintA([
             'foo' => 'bar',
-        ));
+        ]);
     }
 
     public function testMagicPropertiesAreNotAllowed()
@@ -55,10 +55,10 @@ class ConstraintTest extends TestCase
     {
         $this->expectException('Symfony\Component\Validator\Exception\InvalidOptionsException');
 
-        new ConstraintC(array(
+        new ConstraintC([
             'option1' => 'default',
             'foo' => 'bar',
-        ));
+        ]);
     }
 
     public function testSetDefaultProperty()
@@ -70,14 +70,14 @@ class ConstraintTest extends TestCase
 
     public function testSetDefaultPropertyDoctrineStyle()
     {
-        $constraint = new ConstraintA(array('value' => 'foo'));
+        $constraint = new ConstraintA(['value' => 'foo']);
 
         $this->assertEquals('foo', $constraint->property2);
     }
 
     public function testSetDefaultPropertyDoctrineStylePlusOtherProperty()
     {
-        $constraint = new ConstraintA(array('value' => 'foo', 'property1' => 'bar'));
+        $constraint = new ConstraintA(['value' => 'foo', 'property1' => 'bar']);
 
         $this->assertEquals('foo', $constraint->property2);
         $this->assertEquals('bar', $constraint->property1);
@@ -85,7 +85,7 @@ class ConstraintTest extends TestCase
 
     public function testSetDefaultPropertyDoctrineStyleWhenDefaultPropertyIsNamedValue()
     {
-        $constraint = new ConstraintWithValueAsDefault(array('value' => 'foo'));
+        $constraint = new ConstraintWithValueAsDefault(['value' => 'foo']);
 
         $this->assertEquals('foo', $constraint->value);
         $this->assertNull($constraint->property);
@@ -93,7 +93,7 @@ class ConstraintTest extends TestCase
 
     public function testDontSetDefaultPropertyIfValuePropertyExists()
     {
-        $constraint = new ConstraintWithValue(array('value' => 'foo'));
+        $constraint = new ConstraintWithValue(['value' => 'foo']);
 
         $this->assertEquals('foo', $constraint->value);
         $this->assertNull($constraint->property);
@@ -115,23 +115,23 @@ class ConstraintTest extends TestCase
 
     public function testRequiredOptionsPassed()
     {
-        $constraint = new ConstraintC(array('option1' => 'default'));
+        $constraint = new ConstraintC(['option1' => 'default']);
 
         $this->assertSame('default', $constraint->option1);
     }
 
     public function testGroupsAreConvertedToArray()
     {
-        $constraint = new ConstraintA(array('groups' => 'Foo'));
+        $constraint = new ConstraintA(['groups' => 'Foo']);
 
-        $this->assertEquals(array('Foo'), $constraint->groups);
+        $this->assertEquals(['Foo'], $constraint->groups);
     }
 
     public function testAddDefaultGroupAddsGroup()
     {
-        $constraint = new ConstraintA(array('groups' => 'Default'));
+        $constraint = new ConstraintA(['groups' => 'Default']);
         $constraint->addImplicitGroupName('Foo');
-        $this->assertEquals(array('Default', 'Foo'), $constraint->groups);
+        $this->assertEquals(['Default', 'Foo'], $constraint->groups);
     }
 
     public function testAllowsSettingZeroRequiredPropertyValue()
@@ -142,9 +142,9 @@ class ConstraintTest extends TestCase
 
     public function testCanCreateConstraintWithNoDefaultOptionAndEmptyArray()
     {
-        $constraint = new ConstraintB(array());
+        $constraint = new ConstraintB([]);
 
-        $this->assertSame(array(Constraint::PROPERTY_CONSTRAINT, Constraint::CLASS_CONSTRAINT), $constraint->getTargets());
+        $this->assertSame([Constraint::PROPERTY_CONSTRAINT, Constraint::CLASS_CONSTRAINT], $constraint->getTargets());
     }
 
     public function testGetTargetsCanBeString()
@@ -158,15 +158,15 @@ class ConstraintTest extends TestCase
     {
         $constraint = new ConstraintA();
 
-        $this->assertEquals(array('property', 'class'), $constraint->getTargets());
+        $this->assertEquals(['property', 'class'], $constraint->getTargets());
     }
 
     public function testSerialize()
     {
-        $constraint = new ConstraintA(array(
+        $constraint = new ConstraintA([
             'property1' => 'foo',
             'property2' => 'bar',
-        ));
+        ]);
 
         $restoredConstraint = unserialize(serialize($constraint));
 
@@ -175,33 +175,33 @@ class ConstraintTest extends TestCase
 
     public function testSerializeInitializesGroupsOptionToDefault()
     {
-        $constraint = new ConstraintA(array(
+        $constraint = new ConstraintA([
             'property1' => 'foo',
             'property2' => 'bar',
-        ));
+        ]);
 
         $constraint = unserialize(serialize($constraint));
 
-        $expected = new ConstraintA(array(
+        $expected = new ConstraintA([
             'property1' => 'foo',
             'property2' => 'bar',
             'groups' => 'Default',
-        ));
+        ]);
 
         $this->assertEquals($expected, $constraint);
     }
 
     public function testSerializeKeepsCustomGroups()
     {
-        $constraint = new ConstraintA(array(
+        $constraint = new ConstraintA([
             'property1' => 'foo',
             'property2' => 'bar',
             'groups' => 'MyGroup',
-        ));
+        ]);
 
         $constraint = unserialize(serialize($constraint));
 
-        $this->assertSame(array('MyGroup'), $constraint->groups);
+        $this->assertSame(['MyGroup'], $constraint->groups);
     }
 
     /**
@@ -214,11 +214,11 @@ class ConstraintTest extends TestCase
 
     public function testOptionsAsDefaultOption()
     {
-        $constraint = new ConstraintA($options = array('value1'));
+        $constraint = new ConstraintA($options = ['value1']);
 
         $this->assertEquals($options, $constraint->property2);
 
-        $constraint = new ConstraintA($options = array('value1', 'property1' => 'value2'));
+        $constraint = new ConstraintA($options = ['value1', 'property1' => 'value2']);
 
         $this->assertEquals($options, $constraint->property2);
     }
@@ -229,12 +229,12 @@ class ConstraintTest extends TestCase
      */
     public function testInvalidOptions()
     {
-        new ConstraintA(array('property2' => 'foo', 'bar', 5 => 'baz'));
+        new ConstraintA(['property2' => 'foo', 'bar', 5 => 'baz']);
     }
 
     public function testOptionsWithInvalidInternalPointer()
     {
-        $options = array('property1' => 'foo');
+        $options = ['property1' => 'foo'];
         next($options);
         next($options);
 
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php b/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
index f0e6afe20d..73d81cbfad 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintViolationListTest.php
@@ -37,7 +37,7 @@ class ConstraintViolationListTest extends TestCase
     public function testInitWithViolations()
     {
         $violation = $this->getViolation('Error');
-        $this->list = new ConstraintViolationList(array($violation));
+        $this->list = new ConstraintViolationList([$violation]);
 
         $this->assertCount(1, $this->list);
         $this->assertSame($violation, $this->list[0]);
@@ -54,11 +54,11 @@ class ConstraintViolationListTest extends TestCase
 
     public function testAddAll()
     {
-        $violations = array(
+        $violations = [
             10 => $this->getViolation('Error 1'),
             20 => $this->getViolation('Error 2'),
             30 => $this->getViolation('Error 3'),
-        );
+        ];
         $otherList = new ConstraintViolationList($violations);
         $this->list->addAll($otherList);
 
@@ -71,11 +71,11 @@ class ConstraintViolationListTest extends TestCase
 
     public function testIterator()
     {
-        $violations = array(
+        $violations = [
             10 => $this->getViolation('Error 1'),
             20 => $this->getViolation('Error 2'),
             30 => $this->getViolation('Error 3'),
-        );
+        ];
 
         $this->list = new ConstraintViolationList($violations);
 
@@ -103,13 +103,13 @@ class ConstraintViolationListTest extends TestCase
 
     public function testToString()
     {
-        $this->list = new ConstraintViolationList(array(
+        $this->list = new ConstraintViolationList([
             $this->getViolation('Error 1', 'Root'),
             $this->getViolation('Error 2', 'Root', 'foo.bar'),
             $this->getViolation('Error 3', 'Root', '[baz]'),
             $this->getViolation('Error 4', '', 'foo.bar'),
             $this->getViolation('Error 5', '', '[baz]'),
-        ));
+        ]);
 
         $expected = <<<'EOF'
 Root:
@@ -133,11 +133,11 @@ EOF;
      */
     public function testFindByCodes($code, $violationsCount)
     {
-        $violations = array(
+        $violations = [
             $this->getViolation('Error', null, null, 'code1'),
             $this->getViolation('Error', null, null, 'code1'),
             $this->getViolation('Error', null, null, 'code2'),
-        );
+        ];
         $list = new ConstraintViolationList($violations);
 
         $specificErrors = $list->findByCodes($code);
@@ -148,15 +148,15 @@ EOF;
 
     public function findByCodesProvider()
     {
-        return array(
-            array('code1', 2),
-            array(array('code1', 'code2'), 3),
-            array('code3', 0),
-        );
+        return [
+            ['code1', 2],
+            [['code1', 'code2'], 3],
+            ['code3', 0],
+        ];
     }
 
     protected function getViolation($message, $root = null, $propertyPath = null, $code = null)
     {
-        return new ConstraintViolation($message, $message, array(), $root, $propertyPath, null, null, $code);
+        return new ConstraintViolation($message, $message, [], $root, $propertyPath, null, null, $code);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
index edaa7fa50d..b43e51f273 100644
--- a/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
+++ b/src/Symfony/Component/Validator/Tests/ConstraintViolationTest.php
@@ -21,7 +21,7 @@ class ConstraintViolationTest extends TestCase
         $violation = new ConstraintViolation(
             'Array',
             '{{ value }}',
-            array('{{ value }}' => array(1, 2, 3)),
+            ['{{ value }}' => [1, 2, 3]],
             'Root',
             'property.path',
             null
@@ -40,8 +40,8 @@ EOF;
         $violation = new ConstraintViolation(
             '42 cannot be used here',
             'this is the message template',
-            array(),
-            array('some_value' => 42),
+            [],
+            ['some_value' => 42],
             'some_value',
             null
         );
@@ -59,8 +59,8 @@ EOF;
         $violation = new ConstraintViolation(
             '42 cannot be used here',
             'this is the message template',
-            array(),
-            array('some_value' => 42),
+            [],
+            ['some_value' => 42],
             'some_value',
             null,
             null,
@@ -85,8 +85,8 @@ EOF;
         $violation = new ConstraintViolation(
             '42 cannot be used here',
             'this is the message template',
-            array(),
-            array('some_value' => 42),
+            [],
+            ['some_value' => 42],
             'some_value',
             null,
             null,
@@ -98,8 +98,8 @@ EOF;
         $violation = new ConstraintViolation(
             '42 cannot be used here',
             'this is the message template',
-            array(),
-            array('some_value' => 42),
+            [],
+            ['some_value' => 42],
             'some_value',
             null,
             null,
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php b/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
index 5e9f2bceaf..2f27974a80 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AbstractComparisonValidatorTestCase.php
@@ -73,10 +73,10 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
 
     public function provideInvalidConstraintOptions()
     {
-        return array(
-            array(null),
-            array(array()),
-        );
+        return [
+            [null],
+            [[]],
+        ];
     }
 
     /**
@@ -95,10 +95,10 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
      */
     public function testThrowsConstraintExceptionIfBothValueAndPropertyPath()
     {
-        $this->createConstraint((array(
+        $this->createConstraint(([
             'value' => 'value',
             'propertyPath' => 'propertyPath',
-        )));
+        ]));
     }
 
     /**
@@ -109,7 +109,7 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
      */
     public function testValidComparisonToValue($dirtyValue, $comparisonValue)
     {
-        $constraint = $this->createConstraint(array('value' => $comparisonValue));
+        $constraint = $this->createConstraint(['value' => $comparisonValue]);
 
         $this->validator->validate($dirtyValue, $constraint);
 
@@ -137,7 +137,7 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
      */
     public function testValidComparisonToPropertyPath($comparedValue)
     {
-        $constraint = $this->createConstraint(array('propertyPath' => 'value'));
+        $constraint = $this->createConstraint(['propertyPath' => 'value']);
 
         $object = new ComparisonTest_Class(5);
 
@@ -153,9 +153,9 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
      */
     public function testValidComparisonToPropertyPathOnArray($comparedValue)
     {
-        $constraint = $this->createConstraint(array('propertyPath' => '[root][value]'));
+        $constraint = $this->createConstraint(['propertyPath' => '[root][value]']);
 
-        $this->setObject(array('root' => array('value' => 5)));
+        $this->setObject(['root' => ['value' => 5]]);
 
         $this->validator->validate($comparedValue, $constraint);
 
@@ -164,7 +164,7 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
 
     public function testNoViolationOnNullObjectWithPropertyPath()
     {
-        $constraint = $this->createConstraint(array('propertyPath' => 'propertyPath'));
+        $constraint = $this->createConstraint(['propertyPath' => 'propertyPath']);
 
         $this->setObject(null);
 
@@ -175,7 +175,7 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
 
     public function testInvalidValuePath()
     {
-        $constraint = $this->createConstraint(array('propertyPath' => 'foo'));
+        $constraint = $this->createConstraint(['propertyPath' => 'foo']);
 
         if (method_exists($this, 'expectException')) {
             $this->expectException(ConstraintDefinitionException::class);
@@ -218,7 +218,7 @@ abstract class AbstractComparisonValidatorTestCase extends ConstraintValidatorTe
             IntlTestHelper::requireIntl($this, '57.1');
         }
 
-        $constraint = $this->createConstraint(array('value' => $comparedValue));
+        $constraint = $this->createConstraint(['value' => $comparedValue]);
         $constraint->message = 'Constraint Message';
 
         $this->validator->validate($dirtyValue, $constraint);
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
index 25e71a1b44..cdd72a22eb 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AllTest.php
@@ -25,9 +25,9 @@ class AllTest extends TestCase
      */
     public function testRejectNonConstraints()
     {
-        new All(array(
+        new All([
             'foo',
-        ));
+        ]);
     }
 
     /**
@@ -35,8 +35,8 @@ class AllTest extends TestCase
      */
     public function testRejectValidConstraint()
     {
-        new All(array(
+        new All([
             new Valid(),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/AllValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/AllValidatorTest.php
index 054b5949ce..a0c64b5082 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/AllValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/AllValidatorTest.php
@@ -26,7 +26,7 @@ class AllValidatorTest extends ConstraintValidatorTestCase
 
     public function testNullIsValid()
     {
-        $this->validator->validate(null, new All(new Range(array('min' => 4))));
+        $this->validator->validate(null, new All(new Range(['min' => 4])));
 
         $this->assertNoViolation();
     }
@@ -36,7 +36,7 @@ class AllValidatorTest extends ConstraintValidatorTestCase
      */
     public function testThrowsExceptionIfNotTraversable()
     {
-        $this->validator->validate('foo.barbar', new All(new Range(array('min' => 4))));
+        $this->validator->validate('foo.barbar', new All(new Range(['min' => 4])));
     }
 
     /**
@@ -44,12 +44,12 @@ class AllValidatorTest extends ConstraintValidatorTestCase
      */
     public function testWalkSingleConstraint($array)
     {
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
         $i = 0;
 
         foreach ($array as $key => $value) {
-            $this->expectValidateValueAt($i++, '['.$key.']', $value, array($constraint));
+            $this->expectValidateValueAt($i++, '['.$key.']', $value, [$constraint]);
         }
 
         $this->validator->validate($array, new All($constraint));
@@ -62,15 +62,15 @@ class AllValidatorTest extends ConstraintValidatorTestCase
      */
     public function testWalkMultipleConstraints($array)
     {
-        $constraint1 = new Range(array('min' => 4));
+        $constraint1 = new Range(['min' => 4]);
         $constraint2 = new NotNull();
 
-        $constraints = array($constraint1, $constraint2);
+        $constraints = [$constraint1, $constraint2];
 
         $i = 0;
 
         foreach ($array as $key => $value) {
-            $this->expectValidateValueAt($i++, '['.$key.']', $value, array($constraint1, $constraint2));
+            $this->expectValidateValueAt($i++, '['.$key.']', $value, [$constraint1, $constraint2]);
         }
 
         $this->validator->validate($array, new All($constraints));
@@ -80,9 +80,9 @@ class AllValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidArguments()
     {
-        return array(
-            array(array(5, 6, 7)),
-            array(new \ArrayObject(array(5, 6, 7))),
-        );
+        return [
+            [[5, 6, 7]],
+            [new \ArrayObject([5, 6, 7])],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/BicValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/BicValidatorTest.php
index e0d7e0db63..d7dc469479 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/BicValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/BicValidatorTest.php
@@ -165,14 +165,14 @@ class BicValidatorTest extends ConstraintValidatorTestCase
     public function getValidBics()
     {
         // http://formvalidation.io/validators/bic/
-        return array(
-            array('ASPKAT2LXXX'),
-            array('ASPKAT2L'),
-            array('DSBACNBXSHA'),
-            array('UNCRIT2B912'),
-            array('DABADKKK'),
-            array('RZOOAT2L303'),
-        );
+        return [
+            ['ASPKAT2LXXX'],
+            ['ASPKAT2L'],
+            ['DSBACNBXSHA'],
+            ['UNCRIT2B912'],
+            ['DABADKKK'],
+            ['RZOOAT2L303'],
+        ];
     }
 
     /**
@@ -180,9 +180,9 @@ class BicValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidBics($bic, $code)
     {
-        $constraint = new Bic(array(
+        $constraint = new Bic([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($bic, $constraint);
 
@@ -194,32 +194,32 @@ class BicValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidBics()
     {
-        return array(
-            array('DEUTD', Bic::INVALID_LENGTH_ERROR),
-            array('ASPKAT2LXX', Bic::INVALID_LENGTH_ERROR),
-            array('ASPKAT2LX', Bic::INVALID_LENGTH_ERROR),
-            array('ASPKAT2LXXX1', Bic::INVALID_LENGTH_ERROR),
-            array('DABADKK', Bic::INVALID_LENGTH_ERROR),
-            array('1SBACNBXSHA', Bic::INVALID_BANK_CODE_ERROR),
-            array('RZ00AT2L303', Bic::INVALID_BANK_CODE_ERROR),
-            array('D2BACNBXSHA', Bic::INVALID_BANK_CODE_ERROR),
-            array('DS3ACNBXSHA', Bic::INVALID_BANK_CODE_ERROR),
-            array('DSB4CNBXSHA', Bic::INVALID_BANK_CODE_ERROR),
-            array('DEUT12HH', Bic::INVALID_COUNTRY_CODE_ERROR),
-            array('DSBAC6BXSHA', Bic::INVALID_COUNTRY_CODE_ERROR),
-            array('DSBA5NBXSHA', Bic::INVALID_COUNTRY_CODE_ERROR),
-            array('DSBAAABXSHA', Bic::INVALID_COUNTRY_CODE_ERROR),
+        return [
+            ['DEUTD', Bic::INVALID_LENGTH_ERROR],
+            ['ASPKAT2LXX', Bic::INVALID_LENGTH_ERROR],
+            ['ASPKAT2LX', Bic::INVALID_LENGTH_ERROR],
+            ['ASPKAT2LXXX1', Bic::INVALID_LENGTH_ERROR],
+            ['DABADKK', Bic::INVALID_LENGTH_ERROR],
+            ['1SBACNBXSHA', Bic::INVALID_BANK_CODE_ERROR],
+            ['RZ00AT2L303', Bic::INVALID_BANK_CODE_ERROR],
+            ['D2BACNBXSHA', Bic::INVALID_BANK_CODE_ERROR],
+            ['DS3ACNBXSHA', Bic::INVALID_BANK_CODE_ERROR],
+            ['DSB4CNBXSHA', Bic::INVALID_BANK_CODE_ERROR],
+            ['DEUT12HH', Bic::INVALID_COUNTRY_CODE_ERROR],
+            ['DSBAC6BXSHA', Bic::INVALID_COUNTRY_CODE_ERROR],
+            ['DSBA5NBXSHA', Bic::INVALID_COUNTRY_CODE_ERROR],
+            ['DSBAAABXSHA', Bic::INVALID_COUNTRY_CODE_ERROR],
 
             // branch code error
-            array('THISSVAL1D]', Bic::INVALID_CHARACTERS_ERROR),
+            ['THISSVAL1D]', Bic::INVALID_CHARACTERS_ERROR],
 
             // location code error
-            array('DEUTDEF]', Bic::INVALID_CHARACTERS_ERROR),
+            ['DEUTDEF]', Bic::INVALID_CHARACTERS_ERROR],
 
             // lower case values are invalid
-            array('DeutAT2LXXX', Bic::INVALID_CASE_ERROR),
-            array('DEUTAT2lxxx', Bic::INVALID_CASE_ERROR),
-        );
+            ['DeutAT2LXXX', Bic::INVALID_CASE_ERROR],
+            ['DEUTAT2lxxx', Bic::INVALID_CASE_ERROR],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/BlankValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/BlankValidatorTest.php
index 94c653b105..1d138348a9 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/BlankValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/BlankValidatorTest.php
@@ -41,9 +41,9 @@ class BlankValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValues($value, $valueAsString)
     {
-        $constraint = new Blank(array(
+        $constraint = new Blank([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -55,11 +55,11 @@ class BlankValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array('foobar', '"foobar"'),
-            array(0, '0'),
-            array(false, 'false'),
-            array(1234, '1234'),
-        );
+        return [
+            ['foobar', '"foobar"'],
+            [0, '0'],
+            [false, 'false'],
+            [1234, '1234'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CallbackValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CallbackValidatorTest.php
index cb1b5c7b01..1c771c2c13 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CallbackValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CallbackValidatorTest.php
@@ -21,7 +21,7 @@ class CallbackValidatorTest_Class
 {
     public static function validateCallback($object, ExecutionContextInterface $context)
     {
-        $context->addViolation('Callback message', array('{{ value }}' => 'foobar'));
+        $context->addViolation('Callback message', ['{{ value }}' => 'foobar']);
 
         return false;
     }
@@ -31,14 +31,14 @@ class CallbackValidatorTest_Object
 {
     public function validate(ExecutionContextInterface $context)
     {
-        $context->addViolation('My message', array('{{ value }}' => 'foobar'));
+        $context->addViolation('My message', ['{{ value }}' => 'foobar']);
 
         return false;
     }
 
     public static function validateStatic($object, ExecutionContextInterface $context)
     {
-        $context->addViolation('Static message', array('{{ value }}' => 'baz'));
+        $context->addViolation('Static message', ['{{ value }}' => 'baz']);
 
         return false;
     }
@@ -73,7 +73,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     public function testSingleMethodExplicitName()
     {
         $object = new CallbackValidatorTest_Object();
-        $constraint = new Callback(array('callback' => 'validate'));
+        $constraint = new Callback(['callback' => 'validate']);
 
         $this->validator->validate($object, $constraint);
 
@@ -98,7 +98,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     {
         $object = new CallbackValidatorTest_Object();
         $constraint = new Callback(function ($object, ExecutionContextInterface $context) {
-            $context->addViolation('My message', array('{{ value }}' => 'foobar'));
+            $context->addViolation('My message', ['{{ value }}' => 'foobar']);
 
             return false;
         });
@@ -113,7 +113,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     public function testClosureNullObject()
     {
         $constraint = new Callback(function ($object, ExecutionContextInterface $context) {
-            $context->addViolation('My message', array('{{ value }}' => 'foobar'));
+            $context->addViolation('My message', ['{{ value }}' => 'foobar']);
 
             return false;
         });
@@ -128,13 +128,13 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     public function testClosureExplicitName()
     {
         $object = new CallbackValidatorTest_Object();
-        $constraint = new Callback(array(
+        $constraint = new Callback([
             'callback' => function ($object, ExecutionContextInterface $context) {
-                $context->addViolation('My message', array('{{ value }}' => 'foobar'));
+                $context->addViolation('My message', ['{{ value }}' => 'foobar']);
 
                 return false;
             },
-        ));
+        ]);
 
         $this->validator->validate($object, $constraint);
 
@@ -146,7 +146,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     public function testArrayCallable()
     {
         $object = new CallbackValidatorTest_Object();
-        $constraint = new Callback(array(__CLASS__.'_Class', 'validateCallback'));
+        $constraint = new Callback([__CLASS__.'_Class', 'validateCallback']);
 
         $this->validator->validate($object, $constraint);
 
@@ -157,7 +157,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
 
     public function testArrayCallableNullObject()
     {
-        $constraint = new Callback(array(__CLASS__.'_Class', 'validateCallback'));
+        $constraint = new Callback([__CLASS__.'_Class', 'validateCallback']);
 
         $this->validator->validate(null, $constraint);
 
@@ -169,9 +169,9 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     public function testArrayCallableExplicitName()
     {
         $object = new CallbackValidatorTest_Object();
-        $constraint = new Callback(array(
-            'callback' => array(__CLASS__.'_Class', 'validateCallback'),
-        ));
+        $constraint = new Callback([
+            'callback' => [__CLASS__.'_Class', 'validateCallback'],
+        ]);
 
         $this->validator->validate($object, $constraint);
 
@@ -187,7 +187,7 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     {
         $object = new CallbackValidatorTest_Object();
 
-        $this->validator->validate($object, new Callback(array('callback' => array('foobar'))));
+        $this->validator->validate($object, new Callback(['callback' => ['foobar']]));
     }
 
     /**
@@ -197,13 +197,13 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     {
         $object = new CallbackValidatorTest_Object();
 
-        $this->validator->validate($object, new Callback(array('callback' => array('foo', 'bar'))));
+        $this->validator->validate($object, new Callback(['callback' => ['foo', 'bar']]));
     }
 
     public function testConstraintGetTargets()
     {
-        $constraint = new Callback(array());
-        $targets = array(Constraint::CLASS_CONSTRAINT, Constraint::PROPERTY_CONSTRAINT);
+        $constraint = new Callback([]);
+        $targets = [Constraint::CLASS_CONSTRAINT, Constraint::PROPERTY_CONSTRAINT];
 
         $this->assertEquals($targets, $constraint->getTargets());
     }
@@ -213,21 +213,21 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
     {
         $constraint = new Callback();
 
-        $this->assertSame(array(Constraint::CLASS_CONSTRAINT, Constraint::PROPERTY_CONSTRAINT), $constraint->getTargets());
+        $this->assertSame([Constraint::CLASS_CONSTRAINT, Constraint::PROPERTY_CONSTRAINT], $constraint->getTargets());
     }
 
     public function testAnnotationInvocationSingleValued()
     {
-        $constraint = new Callback(array('value' => 'validateStatic'));
+        $constraint = new Callback(['value' => 'validateStatic']);
 
         $this->assertEquals(new Callback('validateStatic'), $constraint);
     }
 
     public function testAnnotationInvocationMultiValued()
     {
-        $constraint = new Callback(array('value' => array(__CLASS__.'_Class', 'validateCallback')));
+        $constraint = new Callback(['value' => [__CLASS__.'_Class', 'validateCallback']]);
 
-        $this->assertEquals(new Callback(array(__CLASS__.'_Class', 'validateCallback')), $constraint);
+        $this->assertEquals(new Callback([__CLASS__.'_Class', 'validateCallback']), $constraint);
     }
 
     public function testPayloadIsPassedToCallback()
@@ -235,21 +235,21 @@ class CallbackValidatorTest extends ConstraintValidatorTestCase
         $object = new \stdClass();
         $payloadCopy = null;
 
-        $constraint = new Callback(array(
+        $constraint = new Callback([
             'callback' => function ($object, ExecutionContextInterface $constraint, $payload) use (&$payloadCopy) {
                 $payloadCopy = $payload;
             },
             'payload' => 'Hello world!',
-        ));
+        ]);
         $this->validator->validate($object, $constraint);
         $this->assertEquals('Hello world!', $payloadCopy);
 
         $payloadCopy = null;
-        $constraint = new Callback(array(
+        $constraint = new Callback([
             'callback' => function ($object, ExecutionContextInterface $constraint, $payload) use (&$payloadCopy) {
                 $payloadCopy = $payload;
             },
-        ));
+        ]);
         $this->validator->validate($object, $constraint);
         $this->assertNull($payloadCopy);
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ChoiceValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ChoiceValidatorTest.php
index 0235408af0..3382191cca 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ChoiceValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ChoiceValidatorTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
 
 function choice_callback()
 {
-    return array('foo', 'bar');
+    return ['foo', 'bar'];
 }
 
 class ChoiceValidatorTest extends ConstraintValidatorTestCase
@@ -29,12 +29,12 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public static function staticCallback()
     {
-        return array('foo', 'bar');
+        return ['foo', 'bar'];
     }
 
     public function objectMethodCallback()
     {
-        return array('foo', 'bar');
+        return ['foo', 'bar'];
     }
 
     /**
@@ -42,10 +42,10 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
      */
     public function testExpectArrayIfMultipleIsTrue()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar'],
             'multiple' => true,
-        ));
+        ]);
 
         $this->validator->validate('asdf', $constraint);
     }
@@ -55,9 +55,9 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
         $this->validator->validate(
             null,
             new Choice(
-                array(
-                    'choices' => array('foo', 'bar'),
-                )
+                [
+                    'choices' => ['foo', 'bar'],
+                ]
             )
         );
 
@@ -77,12 +77,12 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidCallbackExpected()
     {
-        $this->validator->validate('foobar', new Choice(array('callback' => 'abcd')));
+        $this->validator->validate('foobar', new Choice(['callback' => 'abcd']));
     }
 
     public function testValidChoiceArray()
     {
-        $constraint = new Choice(array('choices' => array('foo', 'bar')));
+        $constraint = new Choice(['choices' => ['foo', 'bar']]);
 
         $this->validator->validate('bar', $constraint);
 
@@ -91,7 +91,7 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidChoiceCallbackFunction()
     {
-        $constraint = new Choice(array('callback' => __NAMESPACE__.'\choice_callback'));
+        $constraint = new Choice(['callback' => __NAMESPACE__.'\choice_callback']);
 
         $this->validator->validate('bar', $constraint);
 
@@ -101,11 +101,11 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
     public function testValidChoiceCallbackClosure()
     {
         $constraint = new Choice(
-            array(
+            [
                 'callback' => function () {
-                    return array('foo', 'bar');
+                    return ['foo', 'bar'];
                 },
-            )
+            ]
         );
 
         $this->validator->validate('bar', $constraint);
@@ -115,7 +115,7 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidChoiceCallbackStaticMethod()
     {
-        $constraint = new Choice(array('callback' => array(__CLASS__, 'staticCallback')));
+        $constraint = new Choice(['callback' => [__CLASS__, 'staticCallback']]);
 
         $this->validator->validate('bar', $constraint);
 
@@ -127,7 +127,7 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
         // search $this for "staticCallback"
         $this->setObject($this);
 
-        $constraint = new Choice(array('callback' => 'staticCallback'));
+        $constraint = new Choice(['callback' => 'staticCallback']);
 
         $this->validator->validate('bar', $constraint);
 
@@ -139,7 +139,7 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
         // search $this for "objectMethodCallback"
         $this->setObject($this);
 
-        $constraint = new Choice(array('callback' => 'objectMethodCallback'));
+        $constraint = new Choice(['callback' => 'objectMethodCallback']);
 
         $this->validator->validate('bar', $constraint);
 
@@ -148,22 +148,22 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testMultipleChoices()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar', 'baz'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar', 'baz'],
             'multiple' => true,
-        ));
+        ]);
 
-        $this->validator->validate(array('baz', 'bar'), $constraint);
+        $this->validator->validate(['baz', 'bar'], $constraint);
 
         $this->assertNoViolation();
     }
 
     public function testInvalidChoice()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar'],
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('baz', $constraint);
 
@@ -176,12 +176,12 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testInvalidChoiceEmptyChoices()
     {
-        $constraint = new Choice(array(
+        $constraint = new Choice([
             // May happen when the choices are provided dynamically, e.g. from
             // the DB or the model
-            'choices' => array(),
+            'choices' => [],
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('baz', $constraint);
 
@@ -194,13 +194,13 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testInvalidChoiceMultiple()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar'],
             'multipleMessage' => 'myMessage',
             'multiple' => true,
-        ));
+        ]);
 
-        $this->validator->validate(array('foo', 'baz'), $constraint);
+        $this->validator->validate(['foo', 'baz'], $constraint);
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ value }}', '"baz"')
@@ -212,14 +212,14 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testTooFewChoices()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar', 'moo', 'maa'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar', 'moo', 'maa'],
             'multiple' => true,
             'min' => 2,
             'minMessage' => 'myMessage',
-        ));
+        ]);
 
-        $value = array('foo');
+        $value = ['foo'];
 
         $this->setValue($value);
 
@@ -235,14 +235,14 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testTooManyChoices()
     {
-        $constraint = new Choice(array(
-            'choices' => array('foo', 'bar', 'moo', 'maa'),
+        $constraint = new Choice([
+            'choices' => ['foo', 'bar', 'moo', 'maa'],
             'multiple' => true,
             'max' => 2,
             'maxMessage' => 'myMessage',
-        ));
+        ]);
 
-        $value = array('foo', 'bar', 'moo');
+        $value = ['foo', 'bar', 'moo'];
 
         $this->setValue($value);
 
@@ -258,9 +258,9 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testStrictAllowsExactValue()
     {
-        $constraint = new Choice(array(
-            'choices' => array(1, 2),
-        ));
+        $constraint = new Choice([
+            'choices' => [1, 2],
+        ]);
 
         $this->validator->validate(2, $constraint);
 
@@ -269,10 +269,10 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testStrictDisallowsDifferentType()
     {
-        $constraint = new Choice(array(
-            'choices' => array(1, 2),
+        $constraint = new Choice([
+            'choices' => [1, 2],
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('2', $constraint);
 
@@ -285,13 +285,13 @@ class ChoiceValidatorTest extends ConstraintValidatorTestCase
 
     public function testStrictWithMultipleChoices()
     {
-        $constraint = new Choice(array(
-            'choices' => array(1, 2, 3),
+        $constraint = new Choice([
+            'choices' => [1, 2, 3],
             'multiple' => true,
             'multipleMessage' => 'myMessage',
-        ));
+        ]);
 
-        $this->validator->validate(array(2, '3'), $constraint);
+        $this->validator->validate([2, '3'], $constraint);
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ value }}', '"3"')
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
index b5fbf6c0b0..fec935082a 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CollectionTest.php
@@ -28,9 +28,9 @@ class CollectionTest extends TestCase
      */
     public function testRejectInvalidFieldsOption()
     {
-        new Collection(array(
+        new Collection([
             'fields' => 'foo',
-        ));
+        ]);
     }
 
     /**
@@ -38,9 +38,9 @@ class CollectionTest extends TestCase
      */
     public function testRejectNonConstraints()
     {
-        new Collection(array(
+        new Collection([
             'foo' => 'bar',
-        ));
+        ]);
     }
 
     /**
@@ -48,9 +48,9 @@ class CollectionTest extends TestCase
      */
     public function testRejectValidConstraint()
     {
-        new Collection(array(
+        new Collection([
             'foo' => new Valid(),
-        ));
+        ]);
     }
 
     /**
@@ -58,9 +58,9 @@ class CollectionTest extends TestCase
      */
     public function testRejectValidConstraintWithinOptional()
     {
-        new Collection(array(
+        new Collection([
             'foo' => new Optional(new Valid()),
-        ));
+        ]);
     }
 
     /**
@@ -68,45 +68,45 @@ class CollectionTest extends TestCase
      */
     public function testRejectValidConstraintWithinRequired()
     {
-        new Collection(array(
+        new Collection([
             'foo' => new Required(new Valid()),
-        ));
+        ]);
     }
 
     public function testAcceptOptionalConstraintAsOneElementArray()
     {
-        $collection1 = new Collection(array(
-            'fields' => array(
-                'alternate_email' => array(
+        $collection1 = new Collection([
+            'fields' => [
+                'alternate_email' => [
                     new Optional(new Email()),
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
-        $collection2 = new Collection(array(
-            'fields' => array(
+        $collection2 = new Collection([
+            'fields' => [
                 'alternate_email' => new Optional(new Email()),
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertEquals($collection1, $collection2);
     }
 
     public function testAcceptRequiredConstraintAsOneElementArray()
     {
-        $collection1 = new Collection(array(
-            'fields' => array(
-                'alternate_email' => array(
+        $collection1 = new Collection([
+            'fields' => [
+                'alternate_email' => [
                     new Required(new Email()),
-                ),
-            ),
-        ));
+                ],
+            ],
+        ]);
 
-        $collection2 = new Collection(array(
-            'fields' => array(
+        $collection2 = new Collection([
+            'fields' => [
                 'alternate_email' => new Required(new Email()),
-            ),
-        ));
+            ],
+        ]);
 
         $this->assertEquals($collection1, $collection2);
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CollectionValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CollectionValidatorTest.php
index d025e1d97b..747be2499a 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CollectionValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CollectionValidatorTest.php
@@ -30,24 +30,24 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
 
     public function testNullIsValid()
     {
-        $this->validator->validate(null, new Collection(array('fields' => array(
-            'foo' => new Range(array('min' => 4)),
-        ))));
+        $this->validator->validate(null, new Collection(['fields' => [
+            'foo' => new Range(['min' => 4]),
+        ]]));
 
         $this->assertNoViolation();
     }
 
     public function testFieldsAsDefaultOption()
     {
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $data = $this->prepareTestData(array('foo' => 'foobar'));
+        $data = $this->prepareTestData(['foo' => 'foobar']);
 
-        $this->expectValidateValueAt(0, '[foo]', $data['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $data['foo'], [$constraint]);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => $constraint,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
@@ -57,49 +57,49 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
      */
     public function testThrowsExceptionIfNotTraversable()
     {
-        $this->validator->validate('foobar', new Collection(array('fields' => array(
-            'foo' => new Range(array('min' => 4)),
-        ))));
+        $this->validator->validate('foobar', new Collection(['fields' => [
+            'foo' => new Range(['min' => 4]),
+        ]]));
     }
 
     public function testWalkSingleConstraint()
     {
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $array = array(
+        $array = [
             'foo' => 3,
             'bar' => 5,
-        );
+        ];
 
         $i = 0;
 
         foreach ($array as $key => $value) {
-            $this->expectValidateValueAt($i++, '['.$key.']', $value, array($constraint));
+            $this->expectValidateValueAt($i++, '['.$key.']', $value, [$constraint]);
         }
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
                 'bar' => $constraint,
-            ),
-        )));
+            ],
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testWalkMultipleConstraints()
     {
-        $constraints = array(
-            new Range(array('min' => 4)),
+        $constraints = [
+            new Range(['min' => 4]),
             new NotNull(),
-        );
+        ];
 
-        $array = array(
+        $array = [
             'foo' => 3,
             'bar' => 5,
-        );
+        ];
 
         $i = 0;
 
@@ -109,33 +109,33 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraints,
                 'bar' => $constraints,
-            ),
-        )));
+            ],
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testExtraFieldsDisallowed()
     {
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $data = $this->prepareTestData(array(
+        $data = $this->prepareTestData([
             'foo' => 5,
             'baz' => 6,
-        ));
+        ]);
 
-        $this->expectValidateValueAt(0, '[foo]', $data['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $data['foo'], [$constraint]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
+            ],
             'extraFieldsMessage' => 'myMessage',
-        )));
+        ]));
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ field }}', '"baz"')
@@ -148,56 +148,56 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
     // bug fix
     public function testNullNotConsideredExtraField()
     {
-        $data = $this->prepareTestData(array(
+        $data = $this->prepareTestData([
             'foo' => null,
-        ));
+        ]);
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->expectValidateValueAt(0, '[foo]', $data['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $data['foo'], [$constraint]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
-        )));
+            ],
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testExtraFieldsAllowed()
     {
-        $data = $this->prepareTestData(array(
+        $data = $this->prepareTestData([
             'foo' => 5,
             'bar' => 6,
-        ));
+        ]);
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->expectValidateValueAt(0, '[foo]', $data['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $data['foo'], [$constraint]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
+            ],
             'allowExtraFields' => true,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testMissingFieldsDisallowed()
     {
-        $data = $this->prepareTestData(array());
+        $data = $this->prepareTestData([]);
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
+            ],
             'missingFieldsMessage' => 'myMessage',
-        )));
+        ]));
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ field }}', '"foo"')
@@ -209,108 +209,108 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
 
     public function testMissingFieldsAllowed()
     {
-        $data = $this->prepareTestData(array());
+        $data = $this->prepareTestData([]);
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
+            ],
             'allowMissingFields' => true,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testOptionalFieldPresent()
     {
-        $data = $this->prepareTestData(array(
+        $data = $this->prepareTestData([
             'foo' => null,
-        ));
+        ]);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Optional(),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testOptionalFieldNotPresent()
     {
-        $data = $this->prepareTestData(array());
+        $data = $this->prepareTestData([]);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Optional(),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testOptionalFieldSingleConstraint()
     {
-        $array = array(
+        $array = [
             'foo' => 5,
-        );
+        ];
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->expectValidateValueAt(0, '[foo]', $array['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $array['foo'], [$constraint]);
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Optional($constraint),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testOptionalFieldMultipleConstraints()
     {
-        $array = array(
+        $array = [
             'foo' => 5,
-        );
+        ];
 
-        $constraints = array(
+        $constraints = [
             new NotNull(),
-            new Range(array('min' => 4)),
-        );
+            new Range(['min' => 4]),
+        ];
 
         $this->expectValidateValueAt(0, '[foo]', $array['foo'], $constraints);
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Optional($constraints),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testRequiredFieldPresent()
     {
-        $data = $this->prepareTestData(array(
+        $data = $this->prepareTestData([
             'foo' => null,
-        ));
+        ]);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Required(),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testRequiredFieldNotPresent()
     {
-        $data = $this->prepareTestData(array());
+        $data = $this->prepareTestData([]);
 
-        $this->validator->validate($data, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($data, new Collection([
+            'fields' => [
                 'foo' => new Required(),
-            ),
+            ],
             'missingFieldsMessage' => 'myMessage',
-        )));
+        ]));
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ field }}', '"foo"')
@@ -322,63 +322,63 @@ abstract class CollectionValidatorTest extends ConstraintValidatorTestCase
 
     public function testRequiredFieldSingleConstraint()
     {
-        $array = array(
+        $array = [
             'foo' => 5,
-        );
+        ];
 
-        $constraint = new Range(array('min' => 4));
+        $constraint = new Range(['min' => 4]);
 
-        $this->expectValidateValueAt(0, '[foo]', $array['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $array['foo'], [$constraint]);
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Required($constraint),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testRequiredFieldMultipleConstraints()
     {
-        $array = array(
+        $array = [
             'foo' => 5,
-        );
+        ];
 
-        $constraints = array(
+        $constraints = [
             new NotNull(),
-            new Range(array('min' => 4)),
-        );
+            new Range(['min' => 4]),
+        ];
 
         $this->expectValidateValueAt(0, '[foo]', $array['foo'], $constraints);
 
         $data = $this->prepareTestData($array);
 
-        $this->validator->validate($data, new Collection(array(
+        $this->validator->validate($data, new Collection([
             'foo' => new Required($constraints),
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function testObjectShouldBeLeftUnchanged()
     {
-        $value = new \ArrayObject(array(
+        $value = new \ArrayObject([
             'foo' => 3,
-        ));
+        ]);
 
-        $constraint = new Range(array('min' => 2));
+        $constraint = new Range(['min' => 2]);
 
-        $this->expectValidateValueAt(0, '[foo]', $value['foo'], array($constraint));
+        $this->expectValidateValueAt(0, '[foo]', $value['foo'], [$constraint]);
 
-        $this->validator->validate($value, new Collection(array(
-            'fields' => array(
+        $this->validator->validate($value, new Collection([
+            'fields' => [
                 'foo' => $constraint,
-            ),
-        )));
+            ],
+        ]));
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'foo' => 3,
-        ), (array) $value);
+        ], (array) $value);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
index df4255007c..3070e6a22f 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
@@ -39,44 +39,44 @@ class CompositeTest extends TestCase
 {
     public function testMergeNestedGroupsIfNoExplicitParentGroup()
     {
-        $constraint = new ConcreteComposite(array(
-            new NotNull(array('groups' => 'Default')),
-            new NotBlank(array('groups' => array('Default', 'Strict'))),
-        ));
+        $constraint = new ConcreteComposite([
+            new NotNull(['groups' => 'Default']),
+            new NotBlank(['groups' => ['Default', 'Strict']]),
+        ]);
 
-        $this->assertEquals(array('Default', 'Strict'), $constraint->groups);
-        $this->assertEquals(array('Default'), $constraint->constraints[0]->groups);
-        $this->assertEquals(array('Default', 'Strict'), $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->groups);
+        $this->assertEquals(['Default'], $constraint->constraints[0]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->constraints[1]->groups);
     }
 
     public function testSetImplicitNestedGroupsIfExplicitParentGroup()
     {
-        $constraint = new ConcreteComposite(array(
-            'constraints' => array(
+        $constraint = new ConcreteComposite([
+            'constraints' => [
                 new NotNull(),
                 new NotBlank(),
-            ),
-            'groups' => array('Default', 'Strict'),
-        ));
+            ],
+            'groups' => ['Default', 'Strict'],
+        ]);
 
-        $this->assertEquals(array('Default', 'Strict'), $constraint->groups);
-        $this->assertEquals(array('Default', 'Strict'), $constraint->constraints[0]->groups);
-        $this->assertEquals(array('Default', 'Strict'), $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->constraints[0]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->constraints[1]->groups);
     }
 
     public function testExplicitNestedGroupsMustBeSubsetOfExplicitParentGroups()
     {
-        $constraint = new ConcreteComposite(array(
-            'constraints' => array(
-                new NotNull(array('groups' => 'Default')),
-                new NotBlank(array('groups' => 'Strict')),
-            ),
-            'groups' => array('Default', 'Strict'),
-        ));
+        $constraint = new ConcreteComposite([
+            'constraints' => [
+                new NotNull(['groups' => 'Default']),
+                new NotBlank(['groups' => 'Strict']),
+            ],
+            'groups' => ['Default', 'Strict'],
+        ]);
 
-        $this->assertEquals(array('Default', 'Strict'), $constraint->groups);
-        $this->assertEquals(array('Default'), $constraint->constraints[0]->groups);
-        $this->assertEquals(array('Strict'), $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->groups);
+        $this->assertEquals(['Default'], $constraint->constraints[0]->groups);
+        $this->assertEquals(['Strict'], $constraint->constraints[1]->groups);
     }
 
     /**
@@ -84,26 +84,26 @@ class CompositeTest extends TestCase
      */
     public function testFailIfExplicitNestedGroupsNotSubsetOfExplicitParentGroups()
     {
-        new ConcreteComposite(array(
-            'constraints' => array(
-                new NotNull(array('groups' => array('Default', 'Foobar'))),
-            ),
-            'groups' => array('Default', 'Strict'),
-        ));
+        new ConcreteComposite([
+            'constraints' => [
+                new NotNull(['groups' => ['Default', 'Foobar']]),
+            ],
+            'groups' => ['Default', 'Strict'],
+        ]);
     }
 
     public function testImplicitGroupNamesAreForwarded()
     {
-        $constraint = new ConcreteComposite(array(
-            new NotNull(array('groups' => 'Default')),
-            new NotBlank(array('groups' => 'Strict')),
-        ));
+        $constraint = new ConcreteComposite([
+            new NotNull(['groups' => 'Default']),
+            new NotBlank(['groups' => 'Strict']),
+        ]);
 
         $constraint->addImplicitGroupName('ImplicitGroup');
 
-        $this->assertEquals(array('Default', 'Strict', 'ImplicitGroup'), $constraint->groups);
-        $this->assertEquals(array('Default', 'ImplicitGroup'), $constraint->constraints[0]->groups);
-        $this->assertEquals(array('Strict'), $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict', 'ImplicitGroup'], $constraint->groups);
+        $this->assertEquals(['Default', 'ImplicitGroup'], $constraint->constraints[0]->groups);
+        $this->assertEquals(['Strict'], $constraint->constraints[1]->groups);
     }
 
     public function testSingleConstraintsAccepted()
@@ -111,7 +111,7 @@ class CompositeTest extends TestCase
         $nestedConstraint = new NotNull();
         $constraint = new ConcreteComposite($nestedConstraint);
 
-        $this->assertEquals(array($nestedConstraint), $constraint->constraints);
+        $this->assertEquals([$nestedConstraint], $constraint->constraints);
     }
 
     /**
@@ -119,10 +119,10 @@ class CompositeTest extends TestCase
      */
     public function testFailIfNoConstraint()
     {
-        new ConcreteComposite(array(
-            new NotNull(array('groups' => 'Default')),
+        new ConcreteComposite([
+            new NotNull(['groups' => 'Default']),
             'NotBlank',
-        ));
+        ]);
     }
 
     /**
@@ -130,10 +130,10 @@ class CompositeTest extends TestCase
      */
     public function testFailIfNoConstraintObject()
     {
-        new ConcreteComposite(array(
-            new NotNull(array('groups' => 'Default')),
+        new ConcreteComposite([
+            new NotNull(['groups' => 'Default']),
             new \ArrayObject(),
-        ));
+        ]);
     }
 
     /**
@@ -141,8 +141,8 @@ class CompositeTest extends TestCase
      */
     public function testValidCantBeNested()
     {
-        new ConcreteComposite(array(
+        new ConcreteComposite([
             new Valid(),
-        ));
+        ]);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
index baa919df2e..49da563918 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CountValidatorTest.php
@@ -44,29 +44,29 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
 
     public function getThreeOrLessElements()
     {
-        return array(
-            array($this->createCollection(array(1))),
-            array($this->createCollection(array(1, 2))),
-            array($this->createCollection(array(1, 2, 3))),
-            array($this->createCollection(array('a' => 1, 'b' => 2, 'c' => 3))),
-        );
+        return [
+            [$this->createCollection([1])],
+            [$this->createCollection([1, 2])],
+            [$this->createCollection([1, 2, 3])],
+            [$this->createCollection(['a' => 1, 'b' => 2, 'c' => 3])],
+        ];
     }
 
     public function getFourElements()
     {
-        return array(
-            array($this->createCollection(array(1, 2, 3, 4))),
-            array($this->createCollection(array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4))),
-        );
+        return [
+            [$this->createCollection([1, 2, 3, 4])],
+            [$this->createCollection(['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4])],
+        ];
     }
 
     public function getFiveOrMoreElements()
     {
-        return array(
-            array($this->createCollection(array(1, 2, 3, 4, 5))),
-            array($this->createCollection(array(1, 2, 3, 4, 5, 6))),
-            array($this->createCollection(array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5))),
-        );
+        return [
+            [$this->createCollection([1, 2, 3, 4, 5])],
+            [$this->createCollection([1, 2, 3, 4, 5, 6])],
+            [$this->createCollection(['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5])],
+        ];
     }
 
     /**
@@ -74,7 +74,7 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMax($value)
     {
-        $constraint = new Count(array('max' => 3));
+        $constraint = new Count(['max' => 3]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -85,7 +85,7 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMin($value)
     {
-        $constraint = new Count(array('min' => 5));
+        $constraint = new Count(['min' => 5]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -107,10 +107,10 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testTooManyValues($value)
     {
-        $constraint = new Count(array(
+        $constraint = new Count([
             'max' => 4,
             'maxMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -128,10 +128,10 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testTooFewValues($value)
     {
-        $constraint = new Count(array(
+        $constraint = new Count([
             'min' => 4,
             'minMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -149,11 +149,11 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testTooManyValuesExact($value)
     {
-        $constraint = new Count(array(
+        $constraint = new Count([
             'min' => 4,
             'max' => 4,
             'exactMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -171,11 +171,11 @@ abstract class CountValidatorTest extends ConstraintValidatorTestCase
      */
     public function testTooFewValuesExact($value)
     {
-        $constraint = new Count(array(
+        $constraint = new Count([
             'min' => 4,
             'max' => 4,
             'exactMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CountryValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CountryValidatorTest.php
index 30ab40a713..51352183e3 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CountryValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CountryValidatorTest.php
@@ -57,11 +57,11 @@ class CountryValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidCountries()
     {
-        return array(
-            array('GB'),
-            array('AT'),
-            array('MY'),
-        );
+        return [
+            ['GB'],
+            ['AT'],
+            ['MY'],
+        ];
     }
 
     /**
@@ -69,9 +69,9 @@ class CountryValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidCountries($country)
     {
-        $constraint = new Country(array(
+        $constraint = new Country([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($country, $constraint);
 
@@ -83,10 +83,10 @@ class CountryValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidCountries()
     {
-        return array(
-            array('foobar'),
-            array('EN'),
-        );
+        return [
+            ['foobar'],
+            ['EN'],
+        ];
     }
 
     public function testValidateUsingCountrySpecificLocale()
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CurrencyValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CurrencyValidatorTest.php
index 3a13775fe1..0e41a97561 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CurrencyValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CurrencyValidatorTest.php
@@ -71,13 +71,13 @@ class CurrencyValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidCurrencies()
     {
-        return array(
-            array('EUR'),
-            array('USD'),
-            array('SIT'),
-            array('AUD'),
-            array('CAD'),
-        );
+        return [
+            ['EUR'],
+            ['USD'],
+            ['SIT'],
+            ['AUD'],
+            ['CAD'],
+        ];
     }
 
     /**
@@ -85,9 +85,9 @@ class CurrencyValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidCurrencies($currency)
     {
-        $constraint = new Currency(array(
+        $constraint = new Currency([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($currency, $constraint);
 
@@ -99,9 +99,9 @@ class CurrencyValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidCurrencies()
     {
-        return array(
-            array('EN'),
-            array('foobar'),
-        );
+        return [
+            ['EN'],
+            ['foobar'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/DateTimeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/DateTimeValidatorTest.php
index c1e9d3807f..06f3894cfc 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/DateTimeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/DateTimeValidatorTest.php
@@ -85,9 +85,9 @@ class DateTimeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidDateTimes($format, $dateTime)
     {
-        $constraint = new DateTime(array(
+        $constraint = new DateTime([
             'format' => $format,
-        ));
+        ]);
 
         $this->validator->validate($dateTime, $constraint);
 
@@ -96,13 +96,13 @@ class DateTimeValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidDateTimes()
     {
-        return array(
-            array('Y-m-d H:i:s e', '1995-03-24 00:00:00 UTC'),
-            array('Y-m-d H:i:s', '2010-01-01 01:02:03'),
-            array('Y/m/d H:i', '2010/01/01 01:02'),
-            array('F d, Y', 'December 31, 1999'),
-            array('d-m-Y', '10-05-1995'),
-        );
+        return [
+            ['Y-m-d H:i:s e', '1995-03-24 00:00:00 UTC'],
+            ['Y-m-d H:i:s', '2010-01-01 01:02:03'],
+            ['Y/m/d H:i', '2010/01/01 01:02'],
+            ['F d, Y', 'December 31, 1999'],
+            ['d-m-Y', '10-05-1995'],
+        ];
     }
 
     /**
@@ -110,10 +110,10 @@ class DateTimeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidDateTimes($format, $dateTime, $code)
     {
-        $constraint = new DateTime(array(
+        $constraint = new DateTime([
             'message' => 'myMessage',
             'format' => $format,
-        ));
+        ]);
 
         $this->validator->validate($dateTime, $constraint);
 
@@ -125,17 +125,17 @@ class DateTimeValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidDateTimes()
     {
-        return array(
-            array('Y-m-d', 'foobar', DateTime::INVALID_FORMAT_ERROR),
-            array('H:i', '00:00:00', DateTime::INVALID_FORMAT_ERROR),
-            array('Y-m-d', '2010-01-01 00:00', DateTime::INVALID_FORMAT_ERROR),
-            array('Y-m-d e', '2010-01-01 TCU', DateTime::INVALID_FORMAT_ERROR),
-            array('Y-m-d H:i:s', '2010-13-01 00:00:00', DateTime::INVALID_DATE_ERROR),
-            array('Y-m-d H:i:s', '2010-04-32 00:00:00', DateTime::INVALID_DATE_ERROR),
-            array('Y-m-d H:i:s', '2010-02-29 00:00:00', DateTime::INVALID_DATE_ERROR),
-            array('Y-m-d H:i:s', '2010-01-01 24:00:00', DateTime::INVALID_TIME_ERROR),
-            array('Y-m-d H:i:s', '2010-01-01 00:60:00', DateTime::INVALID_TIME_ERROR),
-            array('Y-m-d H:i:s', '2010-01-01 00:00:60', DateTime::INVALID_TIME_ERROR),
-        );
+        return [
+            ['Y-m-d', 'foobar', DateTime::INVALID_FORMAT_ERROR],
+            ['H:i', '00:00:00', DateTime::INVALID_FORMAT_ERROR],
+            ['Y-m-d', '2010-01-01 00:00', DateTime::INVALID_FORMAT_ERROR],
+            ['Y-m-d e', '2010-01-01 TCU', DateTime::INVALID_FORMAT_ERROR],
+            ['Y-m-d H:i:s', '2010-13-01 00:00:00', DateTime::INVALID_DATE_ERROR],
+            ['Y-m-d H:i:s', '2010-04-32 00:00:00', DateTime::INVALID_DATE_ERROR],
+            ['Y-m-d H:i:s', '2010-02-29 00:00:00', DateTime::INVALID_DATE_ERROR],
+            ['Y-m-d H:i:s', '2010-01-01 24:00:00', DateTime::INVALID_TIME_ERROR],
+            ['Y-m-d H:i:s', '2010-01-01 00:60:00', DateTime::INVALID_TIME_ERROR],
+            ['Y-m-d H:i:s', '2010-01-01 00:00:60', DateTime::INVALID_TIME_ERROR],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/DateValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/DateValidatorTest.php
index 340b4f6312..4dc8a966b4 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/DateValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/DateValidatorTest.php
@@ -78,11 +78,11 @@ class DateValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidDates()
     {
-        return array(
-            array('2010-01-01'),
-            array('1955-12-12'),
-            array('2030-05-31'),
-        );
+        return [
+            ['2010-01-01'],
+            ['1955-12-12'],
+            ['2030-05-31'],
+        ];
     }
 
     /**
@@ -90,9 +90,9 @@ class DateValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidDates($date, $code)
     {
-        $constraint = new Date(array(
+        $constraint = new Date([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($date, $constraint);
 
@@ -104,13 +104,13 @@ class DateValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidDates()
     {
-        return array(
-            array('foobar', Date::INVALID_FORMAT_ERROR),
-            array('foobar 2010-13-01', Date::INVALID_FORMAT_ERROR),
-            array('2010-13-01 foobar', Date::INVALID_FORMAT_ERROR),
-            array('2010-13-01', Date::INVALID_DATE_ERROR),
-            array('2010-04-32', Date::INVALID_DATE_ERROR),
-            array('2010-02-29', Date::INVALID_DATE_ERROR),
-        );
+        return [
+            ['foobar', Date::INVALID_FORMAT_ERROR],
+            ['foobar 2010-13-01', Date::INVALID_FORMAT_ERROR],
+            ['2010-13-01 foobar', Date::INVALID_FORMAT_ERROR],
+            ['2010-13-01', Date::INVALID_DATE_ERROR],
+            ['2010-04-32', Date::INVALID_DATE_ERROR],
+            ['2010-02-29', Date::INVALID_DATE_ERROR],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/DivisibleByValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/DivisibleByValidatorTest.php
index 3c770a9f9b..e2d50574a7 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/DivisibleByValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/DivisibleByValidatorTest.php
@@ -39,16 +39,16 @@ class DivisibleByValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(-7, 1),
-            array(0, 3.1415),
-            array(42, 42),
-            array(42, 21),
-            array(3.25, 0.25),
-            array('100', '10'),
-            array(4.1, 0.1),
-            array(-4.1, 0.1),
-        );
+        return [
+            [-7, 1],
+            [0, 3.1415],
+            [42, 42],
+            [42, 21],
+            [3.25, 0.25],
+            ['100', '10'],
+            [4.1, 0.1],
+            [-4.1, 0.1],
+        ];
     }
 
     /**
@@ -56,9 +56,9 @@ class DivisibleByValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(25),
-        );
+        return [
+            [25],
+        ];
     }
 
     /**
@@ -66,13 +66,13 @@ class DivisibleByValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(1, '1', 2, '2', 'integer'),
-            array(10, '10', 3, '3', 'integer'),
-            array(10, '10', 0, '0', 'integer'),
-            array(42, '42', INF, 'INF', 'double'),
-            array(4.15, '4.15', 0.1, '0.1', 'double'),
-            array('22', '"22"', '10', '"10"', 'string'),
-        );
+        return [
+            [1, '1', 2, '2', 'integer'],
+            [10, '10', 3, '3', 'integer'],
+            [10, '10', 0, '0', 'integer'],
+            [42, '42', INF, 'INF', 'double'],
+            [4.15, '4.15', 0.1, '0.1', 'double'],
+            ['22', '"22"', '10', '"10"', 'string'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/EmailTest.php b/src/Symfony/Component/Validator/Tests/Constraints/EmailTest.php
index 6173b35284..8a19263e00 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/EmailTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/EmailTest.php
@@ -22,14 +22,14 @@ class EmailTest extends TestCase
      */
     public function testLegacyConstructorStrict()
     {
-        $subject = new Email(array('strict' => true));
+        $subject = new Email(['strict' => true]);
 
         $this->assertTrue($subject->strict);
     }
 
     public function testConstructorStrict()
     {
-        $subject = new Email(array('mode' => Email::VALIDATION_MODE_STRICT));
+        $subject = new Email(['mode' => Email::VALIDATION_MODE_STRICT]);
 
         $this->assertEquals(Email::VALIDATION_MODE_STRICT, $subject->mode);
     }
@@ -40,6 +40,6 @@ class EmailTest extends TestCase
      */
     public function testUnknownModesTriggerException()
     {
-        new Email(array('mode' => 'Unknown Mode'));
+        new Email(['mode' => 'Unknown Mode']);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/EmailValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/EmailValidatorTest.php
index 8bc11d4fd7..51b528d46f 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/EmailValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/EmailValidatorTest.php
@@ -82,16 +82,16 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidEmails()
     {
-        return array(
-            array('fabien@symfony.com'),
-            array('example@example.co.uk'),
-            array('fabien_potencier@example.fr'),
-            array('example@example.co..uk'),
-            array('{}~!@!@£$%%^&*().!@£$%^&*()'),
-            array('example@example.co..uk'),
-            array('example@-example.com'),
-            array(sprintf('example@%s.com', str_repeat('a', 64))),
-        );
+        return [
+            ['fabien@symfony.com'],
+            ['example@example.co.uk'],
+            ['fabien_potencier@example.fr'],
+            ['example@example.co..uk'],
+            ['{}~!@!@£$%%^&*().!@£$%^&*()'],
+            ['example@example.co..uk'],
+            ['example@-example.com'],
+            [sprintf('example@%s.com', str_repeat('a', 64))],
+        ];
     }
 
     /**
@@ -99,19 +99,19 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidEmailsHtml5($email)
     {
-        $this->validator->validate($email, new Email(array('mode' => Email::VALIDATION_MODE_HTML5)));
+        $this->validator->validate($email, new Email(['mode' => Email::VALIDATION_MODE_HTML5]));
 
         $this->assertNoViolation();
     }
 
     public function getValidEmailsHtml5()
     {
-        return array(
-            array('fabien@symfony.com'),
-            array('example@example.co.uk'),
-            array('fabien_potencier@example.fr'),
-            array('{}~!@example.com'),
-        );
+        return [
+            ['fabien@symfony.com'],
+            ['example@example.co.uk'],
+            ['fabien_potencier@example.fr'],
+            ['{}~!@example.com'],
+        ];
     }
 
     /**
@@ -119,9 +119,9 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidEmails($email)
     {
-        $constraint = new Email(array(
+        $constraint = new Email([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($email, $constraint);
 
@@ -133,12 +133,12 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidEmails()
     {
-        return array(
-            array('example'),
-            array('example@'),
-            array('example@localhost'),
-            array('foo@example.com bar'),
-        );
+        return [
+            ['example'],
+            ['example@'],
+            ['example@localhost'],
+            ['foo@example.com bar'],
+        ];
     }
 
     /**
@@ -147,10 +147,10 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
     public function testInvalidHtml5Emails($email)
     {
         $constraint = new Email(
-            array(
+            [
                 'message' => 'myMessage',
                 'mode' => Email::VALIDATION_MODE_HTML5,
-            )
+            ]
         );
 
         $this->validator->validate($email, $constraint);
@@ -163,29 +163,29 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidHtml5Emails()
     {
-        return array(
-            array('example'),
-            array('example@'),
-            array('example@localhost'),
-            array('example@example.co..uk'),
-            array('foo@example.com bar'),
-            array('example@example.'),
-            array('example@.fr'),
-            array('@example.com'),
-            array('example@example.com;example@example.com'),
-            array('example@.'),
-            array(' example@example.com'),
-            array('example@ '),
-            array(' example@example.com '),
-            array(' example @example .com '),
-            array('example@-example.com'),
-            array(sprintf('example@%s.com', str_repeat('a', 64))),
-        );
+        return [
+            ['example'],
+            ['example@'],
+            ['example@localhost'],
+            ['example@example.co..uk'],
+            ['foo@example.com bar'],
+            ['example@example.'],
+            ['example@.fr'],
+            ['@example.com'],
+            ['example@example.com;example@example.com'],
+            ['example@.'],
+            [' example@example.com'],
+            ['example@ '],
+            [' example@example.com '],
+            [' example @example .com '],
+            ['example@-example.com'],
+            [sprintf('example@%s.com', str_repeat('a', 64))],
+        ];
     }
 
     public function testModeStrict()
     {
-        $constraint = new Email(array('mode' => Email::VALIDATION_MODE_STRICT));
+        $constraint = new Email(['mode' => Email::VALIDATION_MODE_STRICT]);
 
         $this->validator->validate('example@localhost', $constraint);
 
@@ -194,7 +194,7 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function testModeHtml5()
     {
-        $constraint = new Email(array('mode' => Email::VALIDATION_MODE_HTML5));
+        $constraint = new Email(['mode' => Email::VALIDATION_MODE_HTML5]);
 
         $this->validator->validate('example@example..com', $constraint);
 
@@ -206,7 +206,7 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function testModeLoose()
     {
-        $constraint = new Email(array('mode' => Email::VALIDATION_MODE_LOOSE));
+        $constraint = new Email(['mode' => Email::VALIDATION_MODE_LOOSE]);
 
         $this->validator->validate('example@example..com', $constraint);
 
@@ -232,7 +232,7 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testStrict()
     {
-        $constraint = new Email(array('strict' => true));
+        $constraint = new Email(['strict' => true]);
 
         $this->validator->validate('example@localhost', $constraint);
 
@@ -244,10 +244,10 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testStrictWithInvalidEmails($email)
     {
-        $constraint = new Email(array(
+        $constraint = new Email([
             'message' => 'myMessage',
             'mode' => Email::VALIDATION_MODE_STRICT,
-        ));
+        ]);
 
         $this->validator->validate($email, $constraint);
 
@@ -263,55 +263,55 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function getInvalidEmailsForStrictChecks()
     {
-        return array(
-            array('test@example.com test'),
-            array('user  name@example.com'),
-            array('user   name@example.com'),
-            array('example.@example.co.uk'),
-            array('example@example@example.co.uk'),
-            array('(test_exampel@example.fr)'),
-            array('example(example)example@example.co.uk'),
-            array('.example@localhost'),
-            array('ex\ample@localhost'),
-            array('example@local\host'),
-            array('example@localhost.'),
-            array('user name@example.com'),
-            array('username@ example . com'),
-            array('example@(fake).com'),
-            array('example@(fake.com'),
-            array('username@example,com'),
-            array('usern,ame@example.com'),
-            array('user[na]me@example.com'),
-            array('"""@iana.org'),
-            array('"\"@iana.org'),
-            array('"test"test@iana.org'),
-            array('"test""test"@iana.org'),
-            array('"test"."test"@iana.org'),
-            array('"test".test@iana.org'),
-            array('"test"'.\chr(0).'@iana.org'),
-            array('"test\"@iana.org'),
-            array(\chr(226).'@iana.org'),
-            array('test@'.\chr(226).'.org'),
-            array('\r\ntest@iana.org'),
-            array('\r\n test@iana.org'),
-            array('\r\n \r\ntest@iana.org'),
-            array('\r\n \r\ntest@iana.org'),
-            array('\r\n \r\n test@iana.org'),
-            array('test@iana.org \r\n'),
-            array('test@iana.org \r\n '),
-            array('test@iana.org \r\n \r\n'),
-            array('test@iana.org \r\n\r\n'),
-            array('test@iana.org  \r\n\r\n '),
-            array('test@iana/icann.org'),
-            array('test@foo;bar.com'),
-            array('test;123@foobar.com'),
-            array('test@example..com'),
-            array('email.email@email."'),
-            array('test@email>'),
-            array('test@email<'),
-            array('test@email{'),
-            array(str_repeat('x', 254).'@example.com'), //email with warnings
-        );
+        return [
+            ['test@example.com test'],
+            ['user  name@example.com'],
+            ['user   name@example.com'],
+            ['example.@example.co.uk'],
+            ['example@example@example.co.uk'],
+            ['(test_exampel@example.fr)'],
+            ['example(example)example@example.co.uk'],
+            ['.example@localhost'],
+            ['ex\ample@localhost'],
+            ['example@local\host'],
+            ['example@localhost.'],
+            ['user name@example.com'],
+            ['username@ example . com'],
+            ['example@(fake).com'],
+            ['example@(fake.com'],
+            ['username@example,com'],
+            ['usern,ame@example.com'],
+            ['user[na]me@example.com'],
+            ['"""@iana.org'],
+            ['"\"@iana.org'],
+            ['"test"test@iana.org'],
+            ['"test""test"@iana.org'],
+            ['"test"."test"@iana.org'],
+            ['"test".test@iana.org'],
+            ['"test"'.\chr(0).'@iana.org'],
+            ['"test\"@iana.org'],
+            [\chr(226).'@iana.org'],
+            ['test@'.\chr(226).'.org'],
+            ['\r\ntest@iana.org'],
+            ['\r\n test@iana.org'],
+            ['\r\n \r\ntest@iana.org'],
+            ['\r\n \r\ntest@iana.org'],
+            ['\r\n \r\n test@iana.org'],
+            ['test@iana.org \r\n'],
+            ['test@iana.org \r\n '],
+            ['test@iana.org \r\n \r\n'],
+            ['test@iana.org \r\n\r\n'],
+            ['test@iana.org  \r\n\r\n '],
+            ['test@iana/icann.org'],
+            ['test@foo;bar.com'],
+            ['test;123@foobar.com'],
+            ['test@example..com'],
+            ['email.email@email."'],
+            ['test@email>'],
+            ['test@email<'],
+            ['test@email{'],
+            [str_repeat('x', 254).'@example.com'], //email with warnings
+        ];
     }
 
     /**
@@ -321,12 +321,12 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testDnsChecks($type, $violation)
     {
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => $violation ? false : $type))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => $violation ? false : $type]]]);
 
-        $constraint = new Email(array(
+        $constraint = new Email([
             'message' => 'myMessage',
             'MX' === $type ? 'checkMX' : 'checkHost' => true,
-        ));
+        ]);
 
         $this->validator->validate('foo@example.com', $constraint);
 
@@ -342,14 +342,14 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function getDnsChecks()
     {
-        return array(
-            array('MX', false),
-            array('MX', Email::MX_CHECK_FAILED_ERROR),
-            array('A', false),
-            array('A', Email::HOST_CHECK_FAILED_ERROR),
-            array('AAAA', false),
-            array('AAAA', Email::HOST_CHECK_FAILED_ERROR),
-        );
+        return [
+            ['MX', false],
+            ['MX', Email::MX_CHECK_FAILED_ERROR],
+            ['A', false],
+            ['A', Email::HOST_CHECK_FAILED_ERROR],
+            ['AAAA', false],
+            ['AAAA', Email::HOST_CHECK_FAILED_ERROR],
+        ];
     }
 
     /**
@@ -358,11 +358,11 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
      */
     public function testHostnameIsProperlyParsed()
     {
-        DnsMock::withMockedHosts(array('baz.com' => array(array('type' => 'MX'))));
+        DnsMock::withMockedHosts(['baz.com' => [['type' => 'MX']]]);
 
         $this->validator->validate(
             '"foo@bar"@baz.com',
-            new Email(array('checkMX' => true))
+            new Email(['checkMX' => true])
         );
 
         $this->assertNoViolation();
@@ -376,10 +376,10 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
     {
         $this->validator->validate(
             'foo@bar.fr@',
-            new Email(array(
+            new Email([
                 'message' => 'myMessage',
                 $checkType => true,
-            ))
+            ])
         );
 
         $this
@@ -391,9 +391,9 @@ class EmailValidatorTest extends ConstraintValidatorTestCase
 
     public function provideCheckTypes()
     {
-        return array(
-            array('checkMX', Email::MX_CHECK_FAILED_ERROR),
-            array('checkHost', Email::HOST_CHECK_FAILED_ERROR),
-        );
+        return [
+            ['checkMX', Email::MX_CHECK_FAILED_ERROR],
+            ['checkHost', Email::HOST_CHECK_FAILED_ERROR],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/EqualToValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/EqualToValidatorTest.php
index e47de8fce2..c1eb2f93ad 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/EqualToValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/EqualToValidatorTest.php
@@ -39,16 +39,16 @@ class EqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(3, 3),
-            array(3, '3'),
-            array('a', 'a'),
-            array(new \DateTime('2000-01-01'), new \DateTime('2000-01-01')),
-            array(new \DateTime('2000-01-01'), '2000-01-01'),
-            array(new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'),
-            array(new ComparisonTest_Class(5), new ComparisonTest_Class(5)),
-            array(null, 1),
-        );
+        return [
+            [3, 3],
+            [3, '3'],
+            ['a', 'a'],
+            [new \DateTime('2000-01-01'), new \DateTime('2000-01-01')],
+            [new \DateTime('2000-01-01'), '2000-01-01'],
+            [new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'],
+            [new ComparisonTest_Class(5), new ComparisonTest_Class(5)],
+            [null, 1],
+        ];
     }
 
     /**
@@ -56,9 +56,9 @@ class EqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(5),
-        );
+        return [
+            [5],
+        ];
     }
 
     /**
@@ -66,13 +66,13 @@ class EqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(1, '1', 2, '2', 'integer'),
-            array('22', '"22"', '333', '"333"', 'string'),
-            array(new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2001-01-01 UTC'), 'Jan 1, 2001, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-        );
+        return [
+            [1, '1', 2, '2', 'integer'],
+            ['22', '"22"', '333', '"333"', 'string'],
+            [new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2001-01-01 UTC'), 'Jan 1, 2001, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ExpressionValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ExpressionValidatorTest.php
index aa2c9bdf10..a61d6d675e 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ExpressionValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ExpressionValidatorTest.php
@@ -26,10 +26,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testExpressionIsEvaluatedWithNullValue()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'false',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(null, $constraint);
 
@@ -41,10 +41,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testExpressionIsEvaluatedWithEmptyStringValue()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'false',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('', $constraint);
 
@@ -70,10 +70,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testFailingExpressionAtObjectLevel()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'this.data == 1',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $object = new Entity();
         $object->data = '2';
@@ -104,10 +104,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testFailingExpressionAtObjectLevelWithToString()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'this.data == 1',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $object = new ToString();
         $object->data = '2';
@@ -140,10 +140,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testFailingExpressionAtPropertyLevel()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'value == this.data',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $object = new Entity();
         $object->data = '1';
@@ -182,10 +182,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testFailingExpressionAtNestedPropertyLevel()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'value == this.data',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $object = new Entity();
         $object->data = '1';
@@ -229,10 +229,10 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
      */
     public function testFailingExpressionAtPropertyLevelWithoutRoot()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'value == "1"',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->setRoot('2');
         $this->setPropertyPath('');
@@ -249,9 +249,9 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testExpressionLanguageUsage()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'false',
-        ));
+        ]);
 
         $expressionLanguage = $this->getMockBuilder('Symfony\Component\ExpressionLanguage\ExpressionLanguage')->getMock();
 
@@ -273,12 +273,12 @@ class ExpressionValidatorTest extends ConstraintValidatorTestCase
 
     public function testPassingCustomValues()
     {
-        $constraint = new Expression(array(
+        $constraint = new Expression([
             'expression' => 'value + custom == 2',
-            'values' => array(
+            'values' => [
                 'custom' => 1,
-            ),
-        ));
+            ],
+        ]);
 
         $this->validator->validate(1, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
index b7745f44fa..d3117ed44a 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileTest.php
@@ -22,7 +22,7 @@ class FileTest extends TestCase
      */
     public function testMaxSize($maxSize, $bytes, $binaryFormat)
     {
-        $file = new File(array('maxSize' => $maxSize));
+        $file = new File(['maxSize' => $maxSize]);
 
         $this->assertSame($bytes, $file->maxSize);
         $this->assertSame($binaryFormat, $file->binaryFormat);
@@ -31,7 +31,7 @@ class FileTest extends TestCase
 
     public function testMagicIsset()
     {
-        $file = new File(array('maxSize' => 1));
+        $file = new File(['maxSize' => 1]);
 
         $this->assertTrue($file->__isset('maxSize'));
         $this->assertTrue($file->__isset('groups'));
@@ -56,7 +56,7 @@ class FileTest extends TestCase
      */
     public function testInvalidValueForMaxSizeThrowsExceptionAfterInitialization($maxSize)
     {
-        $file = new File(array('maxSize' => 1000));
+        $file = new File(['maxSize' => 1000]);
         $file->maxSize = $maxSize;
     }
 
@@ -65,7 +65,7 @@ class FileTest extends TestCase
      */
     public function testMaxSizeCannotBeSetToInvalidValueAfterInitialization($maxSize)
     {
-        $file = new File(array('maxSize' => 1000));
+        $file = new File(['maxSize' => 1000]);
 
         try {
             $file->maxSize = $maxSize;
@@ -81,35 +81,35 @@ class FileTest extends TestCase
      */
     public function testInvalidMaxSize($maxSize)
     {
-        new File(array('maxSize' => $maxSize));
+        new File(['maxSize' => $maxSize]);
     }
 
     public function provideValidSizes()
     {
-        return array(
-            array('500', 500, false),
-            array(12300, 12300, false),
-            array('1ki', 1024, true),
-            array('1KI', 1024, true),
-            array('2k', 2000, false),
-            array('2K', 2000, false),
-            array('1mi', 1048576, true),
-            array('1MI', 1048576, true),
-            array('3m', 3000000, false),
-            array('3M', 3000000, false),
-        );
+        return [
+            ['500', 500, false],
+            [12300, 12300, false],
+            ['1ki', 1024, true],
+            ['1KI', 1024, true],
+            ['2k', 2000, false],
+            ['2K', 2000, false],
+            ['1mi', 1048576, true],
+            ['1MI', 1048576, true],
+            ['3m', 3000000, false],
+            ['3M', 3000000, false],
+        ];
     }
 
     public function provideInvalidSizes()
     {
-        return array(
-            array('+100'),
-            array('foo'),
-            array('1Ko'),
-            array('1kio'),
-            array('1G'),
-            array('1Gi'),
-        );
+        return [
+            ['+100'],
+            ['foo'],
+            ['1Ko'],
+            ['1kio'],
+            ['1G'],
+            ['1Gi'],
+        ];
     }
 
     /**
@@ -117,23 +117,23 @@ class FileTest extends TestCase
      */
     public function testBinaryFormat($maxSize, $guessedFormat, $binaryFormat)
     {
-        $file = new File(array('maxSize' => $maxSize, 'binaryFormat' => $guessedFormat));
+        $file = new File(['maxSize' => $maxSize, 'binaryFormat' => $guessedFormat]);
 
         $this->assertSame($binaryFormat, $file->binaryFormat);
     }
 
     public function provideFormats()
     {
-        return array(
-            array(100, null, false),
-            array(100, true, true),
-            array(100, false, false),
-            array('100K', null, false),
-            array('100K', true, true),
-            array('100K', false, false),
-            array('100Ki', null, true),
-            array('100Ki', true, true),
-            array('100Ki', false, false),
-        );
+        return [
+            [100, null, false],
+            [100, true, true],
+            [100, false, false],
+            ['100K', null, false],
+            ['100K', true, true],
+            ['100K', false, false],
+            ['100Ki', null, true],
+            ['100Ki', true, true],
+            ['100Ki', false, false],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorPathTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorPathTest.php
index 11b8d4cb79..dfd82f15cc 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorPathTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorPathTest.php
@@ -22,9 +22,9 @@ class FileValidatorPathTest extends FileValidatorTest
 
     public function testFileNotFound()
     {
-        $constraint = new File(array(
+        $constraint = new File([
             'notFoundMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('foobar', $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
index 13d7b24ce2..7915178e60 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/FileValidatorTest.php
@@ -116,44 +116,44 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
         // same unit used to specify the limit.
 
         // As of Symfony 2.5, the above logic is implemented.
-        return array(
+        return [
             // limit in bytes
-            array(1001, 1000, '1001', '1000', 'bytes'),
-            array(1004, 1000, '1004', '1000', 'bytes'),
-            array(1005, 1000, '1.01', '1', 'kB'),
+            [1001, 1000, '1001', '1000', 'bytes'],
+            [1004, 1000, '1004', '1000', 'bytes'],
+            [1005, 1000, '1.01', '1', 'kB'],
 
-            array(1000001, 1000000, '1000001', '1000000', 'bytes'),
-            array(1004999, 1000000, '1005', '1000', 'kB'),
-            array(1005000, 1000000, '1.01', '1', 'MB'),
+            [1000001, 1000000, '1000001', '1000000', 'bytes'],
+            [1004999, 1000000, '1005', '1000', 'kB'],
+            [1005000, 1000000, '1.01', '1', 'MB'],
 
             // limit in kB
-            array(1001, '1k', '1001', '1000', 'bytes'),
-            array(1004, '1k', '1004', '1000', 'bytes'),
-            array(1005, '1k', '1.01', '1', 'kB'),
+            [1001, '1k', '1001', '1000', 'bytes'],
+            [1004, '1k', '1004', '1000', 'bytes'],
+            [1005, '1k', '1.01', '1', 'kB'],
 
-            array(1000001, '1000k', '1000001', '1000000', 'bytes'),
-            array(1004999, '1000k', '1005', '1000', 'kB'),
-            array(1005000, '1000k', '1.01', '1', 'MB'),
+            [1000001, '1000k', '1000001', '1000000', 'bytes'],
+            [1004999, '1000k', '1005', '1000', 'kB'],
+            [1005000, '1000k', '1.01', '1', 'MB'],
 
             // limit in MB
-            array(1000001, '1M', '1000001', '1000000', 'bytes'),
-            array(1004999, '1M', '1005', '1000', 'kB'),
-            array(1005000, '1M', '1.01', '1', 'MB'),
+            [1000001, '1M', '1000001', '1000000', 'bytes'],
+            [1004999, '1M', '1005', '1000', 'kB'],
+            [1005000, '1M', '1.01', '1', 'MB'],
 
             // limit in KiB
-            array(1025, '1Ki', '1025', '1024', 'bytes'),
-            array(1029, '1Ki', '1029', '1024', 'bytes'),
-            array(1030, '1Ki', '1.01', '1', 'KiB'),
+            [1025, '1Ki', '1025', '1024', 'bytes'],
+            [1029, '1Ki', '1029', '1024', 'bytes'],
+            [1030, '1Ki', '1.01', '1', 'KiB'],
 
-            array(1048577, '1024Ki', '1048577', '1048576', 'bytes'),
-            array(1053818, '1024Ki', '1029.12', '1024', 'KiB'),
-            array(1053819, '1024Ki', '1.01', '1', 'MiB'),
+            [1048577, '1024Ki', '1048577', '1048576', 'bytes'],
+            [1053818, '1024Ki', '1029.12', '1024', 'KiB'],
+            [1053819, '1024Ki', '1.01', '1', 'MiB'],
 
             // limit in MiB
-            array(1048577, '1Mi', '1048577', '1048576', 'bytes'),
-            array(1053818, '1Mi', '1029.12', '1024', 'KiB'),
-            array(1053819, '1Mi', '1.01', '1', 'MiB'),
-        );
+            [1048577, '1Mi', '1048577', '1048576', 'bytes'],
+            [1053818, '1Mi', '1029.12', '1024', 'KiB'],
+            [1053819, '1Mi', '1.01', '1', 'MiB'],
+        ];
     }
 
     /**
@@ -165,10 +165,10 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
         fwrite($this->file, '0');
         fclose($this->file);
 
-        $constraint = new File(array(
+        $constraint = new File([
             'maxSize' => $limit,
             'maxSizeMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->getFile($this->path), $constraint);
 
@@ -184,25 +184,25 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
 
     public function provideMaxSizeNotExceededTests()
     {
-        return array(
+        return [
             // limit in bytes
-            array(1000, 1000),
-            array(1000000, 1000000),
+            [1000, 1000],
+            [1000000, 1000000],
 
             // limit in kB
-            array(1000, '1k'),
-            array(1000000, '1000k'),
+            [1000, '1k'],
+            [1000000, '1000k'],
 
             // limit in MB
-            array(1000000, '1M'),
+            [1000000, '1M'],
 
             // limit in KiB
-            array(1024, '1Ki'),
-            array(1048576, '1024Ki'),
+            [1024, '1Ki'],
+            [1048576, '1024Ki'],
 
             // limit in MiB
-            array(1048576, '1Mi'),
-        );
+            [1048576, '1Mi'],
+        ];
     }
 
     /**
@@ -214,10 +214,10 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
         fwrite($this->file, '0');
         fclose($this->file);
 
-        $constraint = new File(array(
+        $constraint = new File([
             'maxSize' => $limit,
             'maxSizeMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->getFile($this->path), $constraint);
 
@@ -229,33 +229,33 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMaxSize()
     {
-        $constraint = new File(array(
+        $constraint = new File([
             'maxSize' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->path, $constraint);
     }
 
     public function provideBinaryFormatTests()
     {
-        return array(
-            array(11, 10, null, '11', '10', 'bytes'),
-            array(11, 10, true, '11', '10', 'bytes'),
-            array(11, 10, false, '11', '10', 'bytes'),
+        return [
+            [11, 10, null, '11', '10', 'bytes'],
+            [11, 10, true, '11', '10', 'bytes'],
+            [11, 10, false, '11', '10', 'bytes'],
 
             // round(size) == 1.01kB, limit == 1kB
-            array(ceil(1000 * 1.01), 1000, null, '1.01', '1', 'kB'),
-            array(ceil(1000 * 1.01), '1k', null, '1.01', '1', 'kB'),
-            array(ceil(1024 * 1.01), '1Ki', null, '1.01', '1', 'KiB'),
+            [ceil(1000 * 1.01), 1000, null, '1.01', '1', 'kB'],
+            [ceil(1000 * 1.01), '1k', null, '1.01', '1', 'kB'],
+            [ceil(1024 * 1.01), '1Ki', null, '1.01', '1', 'KiB'],
 
-            array(ceil(1024 * 1.01), 1024, true, '1.01', '1', 'KiB'),
-            array(ceil(1024 * 1.01 * 1000), '1024k', true, '1010', '1000', 'KiB'),
-            array(ceil(1024 * 1.01), '1Ki', true, '1.01', '1', 'KiB'),
+            [ceil(1024 * 1.01), 1024, true, '1.01', '1', 'KiB'],
+            [ceil(1024 * 1.01 * 1000), '1024k', true, '1010', '1000', 'KiB'],
+            [ceil(1024 * 1.01), '1Ki', true, '1.01', '1', 'KiB'],
 
-            array(ceil(1000 * 1.01), 1000, false, '1.01', '1', 'kB'),
-            array(ceil(1000 * 1.01), '1k', false, '1.01', '1', 'kB'),
-            array(ceil(1024 * 1.01 * 10), '10Ki', false, '10.34', '10.24', 'kB'),
-        );
+            [ceil(1000 * 1.01), 1000, false, '1.01', '1', 'kB'],
+            [ceil(1000 * 1.01), '1k', false, '1.01', '1', 'kB'],
+            [ceil(1024 * 1.01 * 10), '10Ki', false, '10.34', '10.24', 'kB'],
+        ];
     }
 
     /**
@@ -267,11 +267,11 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
         fwrite($this->file, '0');
         fclose($this->file);
 
-        $constraint = new File(array(
+        $constraint = new File([
             'maxSize' => $limit,
             'binaryFormat' => $binaryFormat,
             'maxSizeMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->getFile($this->path), $constraint);
 
@@ -289,7 +289,7 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     {
         $file = $this
             ->getMockBuilder('Symfony\Component\HttpFoundation\File\File')
-            ->setConstructorArgs(array(__DIR__.'/Fixtures/foo'))
+            ->setConstructorArgs([__DIR__.'/Fixtures/foo'])
             ->getMock();
         $file
             ->expects($this->once())
@@ -300,9 +300,9 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
             ->method('getMimeType')
             ->will($this->returnValue('image/jpg'));
 
-        $constraint = new File(array(
-            'mimeTypes' => array('image/png', 'image/jpg'),
-        ));
+        $constraint = new File([
+            'mimeTypes' => ['image/png', 'image/jpg'],
+        ]);
 
         $this->validator->validate($file, $constraint);
 
@@ -313,7 +313,7 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     {
         $file = $this
             ->getMockBuilder('Symfony\Component\HttpFoundation\File\File')
-            ->setConstructorArgs(array(__DIR__.'/Fixtures/foo'))
+            ->setConstructorArgs([__DIR__.'/Fixtures/foo'])
             ->getMock();
         $file
             ->expects($this->once())
@@ -324,9 +324,9 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
             ->method('getMimeType')
             ->will($this->returnValue('image/jpg'));
 
-        $constraint = new File(array(
-            'mimeTypes' => array('image/*'),
-        ));
+        $constraint = new File([
+            'mimeTypes' => ['image/*'],
+        ]);
 
         $this->validator->validate($file, $constraint);
 
@@ -337,7 +337,7 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     {
         $file = $this
             ->getMockBuilder('Symfony\Component\HttpFoundation\File\File')
-            ->setConstructorArgs(array(__DIR__.'/Fixtures/foo'))
+            ->setConstructorArgs([__DIR__.'/Fixtures/foo'])
             ->getMock();
         $file
             ->expects($this->once())
@@ -348,10 +348,10 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
             ->method('getMimeType')
             ->will($this->returnValue('application/pdf'));
 
-        $constraint = new File(array(
-            'mimeTypes' => array('image/png', 'image/jpg'),
+        $constraint = new File([
+            'mimeTypes' => ['image/png', 'image/jpg'],
             'mimeTypesMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($file, $constraint);
 
@@ -368,7 +368,7 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     {
         $file = $this
             ->getMockBuilder('Symfony\Component\HttpFoundation\File\File')
-            ->setConstructorArgs(array(__DIR__.'/Fixtures/foo'))
+            ->setConstructorArgs([__DIR__.'/Fixtures/foo'])
             ->getMock();
         $file
             ->expects($this->once())
@@ -379,10 +379,10 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
             ->method('getMimeType')
             ->will($this->returnValue('application/pdf'));
 
-        $constraint = new File(array(
-            'mimeTypes' => array('image/*', 'image/jpg'),
+        $constraint = new File([
+            'mimeTypes' => ['image/*', 'image/jpg'],
             'mimeTypesMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($file, $constraint);
 
@@ -399,9 +399,9 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     {
         ftruncate($this->file, 0);
 
-        $constraint = new File(array(
+        $constraint = new File([
             'disallowEmptyMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->getFile($this->path), $constraint);
 
@@ -415,14 +415,14 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
     /**
      * @dataProvider uploadedFileErrorProvider
      */
-    public function testUploadedFileError($error, $message, array $params = array(), $maxSize = null)
+    public function testUploadedFileError($error, $message, array $params = [], $maxSize = null)
     {
         $file = new UploadedFile(tempnam(sys_get_temp_dir(), 'file-validator-test-'), 'originalName', 'mime', $error);
 
-        $constraint = new File(array(
+        $constraint = new File([
             $message => 'myMessage',
             'maxSize' => $maxSize,
-        ));
+        ]);
 
         $this->validator->validate($file, $constraint);
 
@@ -434,47 +434,47 @@ abstract class FileValidatorTest extends ConstraintValidatorTestCase
 
     public function uploadedFileErrorProvider()
     {
-        $tests = array(
-            array(UPLOAD_ERR_FORM_SIZE, 'uploadFormSizeErrorMessage'),
-            array(UPLOAD_ERR_PARTIAL, 'uploadPartialErrorMessage'),
-            array(UPLOAD_ERR_NO_FILE, 'uploadNoFileErrorMessage'),
-            array(UPLOAD_ERR_NO_TMP_DIR, 'uploadNoTmpDirErrorMessage'),
-            array(UPLOAD_ERR_CANT_WRITE, 'uploadCantWriteErrorMessage'),
-            array(UPLOAD_ERR_EXTENSION, 'uploadExtensionErrorMessage'),
-        );
+        $tests = [
+            [UPLOAD_ERR_FORM_SIZE, 'uploadFormSizeErrorMessage'],
+            [UPLOAD_ERR_PARTIAL, 'uploadPartialErrorMessage'],
+            [UPLOAD_ERR_NO_FILE, 'uploadNoFileErrorMessage'],
+            [UPLOAD_ERR_NO_TMP_DIR, 'uploadNoTmpDirErrorMessage'],
+            [UPLOAD_ERR_CANT_WRITE, 'uploadCantWriteErrorMessage'],
+            [UPLOAD_ERR_EXTENSION, 'uploadExtensionErrorMessage'],
+        ];
 
         if (class_exists('Symfony\Component\HttpFoundation\File\UploadedFile')) {
             // when no maxSize is specified on constraint, it should use the ini value
-            $tests[] = array(UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', array(
+            $tests[] = [UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', [
                 '{{ limit }}' => UploadedFile::getMaxFilesize() / 1048576,
                 '{{ suffix }}' => 'MiB',
-            ));
+            ]];
 
             // it should use the smaller limitation (maxSize option in this case)
-            $tests[] = array(UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', array(
+            $tests[] = [UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', [
                 '{{ limit }}' => 1,
                 '{{ suffix }}' => 'bytes',
-            ), '1');
+            ], '1'];
 
             // access FileValidator::factorizeSizes() private method to format max file size
             $reflection = new \ReflectionClass(\get_class(new FileValidator()));
             $method = $reflection->getMethod('factorizeSizes');
             $method->setAccessible(true);
-            list($sizeAsString, $limit, $suffix) = $method->invokeArgs(new FileValidator(), array(0, UploadedFile::getMaxFilesize(), false));
+            list($sizeAsString, $limit, $suffix) = $method->invokeArgs(new FileValidator(), [0, UploadedFile::getMaxFilesize(), false]);
 
             // it correctly parses the maxSize option and not only uses simple string comparison
             // 1000M should be bigger than the ini value
-            $tests[] = array(UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', array(
+            $tests[] = [UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', [
                 '{{ limit }}' => $limit,
                 '{{ suffix }}' => $suffix,
-            ), '1000M');
+            ], '1000M'];
 
             // it correctly parses the maxSize option and not only uses simple string comparison
             // 1000M should be bigger than the ini value
-            $tests[] = array(UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', array(
+            $tests[] = [UPLOAD_ERR_INI_SIZE, 'uploadIniSizeErrorMessage', [
                 '{{ limit }}' => '0.1',
                 '{{ suffix }}' => 'MB',
-            ), '100K');
+            ], '100K'];
         }
 
         return $tests;
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanOrEqualValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanOrEqualValidatorTest.php
index 22fb9b662b..d8d8eab8bd 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanOrEqualValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanOrEqualValidatorTest.php
@@ -39,19 +39,19 @@ class GreaterThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCas
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(3, 2),
-            array(1, 1),
-            array(new \DateTime('2010/01/01'), new \DateTime('2000/01/01')),
-            array(new \DateTime('2000/01/01'), new \DateTime('2000/01/01')),
-            array(new \DateTime('2010/01/01'), '2000/01/01'),
-            array(new \DateTime('2000/01/01'), '2000/01/01'),
-            array(new \DateTime('2010/01/01 UTC'), '2000/01/01 UTC'),
-            array(new \DateTime('2000/01/01 UTC'), '2000/01/01 UTC'),
-            array('a', 'a'),
-            array('z', 'a'),
-            array(null, 1),
-        );
+        return [
+            [3, 2],
+            [1, 1],
+            [new \DateTime('2010/01/01'), new \DateTime('2000/01/01')],
+            [new \DateTime('2000/01/01'), new \DateTime('2000/01/01')],
+            [new \DateTime('2010/01/01'), '2000/01/01'],
+            [new \DateTime('2000/01/01'), '2000/01/01'],
+            [new \DateTime('2010/01/01 UTC'), '2000/01/01 UTC'],
+            [new \DateTime('2000/01/01 UTC'), '2000/01/01 UTC'],
+            ['a', 'a'],
+            ['z', 'a'],
+            [null, 1],
+        ];
     }
 
     /**
@@ -59,10 +59,10 @@ class GreaterThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCas
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(5),
-            array(6),
-        );
+        return [
+            [5],
+            [6],
+        ];
     }
 
     /**
@@ -70,12 +70,12 @@ class GreaterThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCas
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(1, '1', 2, '2', 'integer'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2005/01/01'), 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2005/01/01', 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2005/01/01 UTC', 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array('b', '"b"', 'c', '"c"', 'string'),
-        );
+        return [
+            [1, '1', 2, '2', 'integer'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2005/01/01'), 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2005/01/01', 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2005/01/01 UTC', 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            ['b', '"b"', 'c', '"c"', 'string'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanValidatorTest.php
index 08446ec847..e678496c41 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/GreaterThanValidatorTest.php
@@ -39,15 +39,15 @@ class GreaterThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(2, 1),
-            array(new \DateTime('2005/01/01'), new \DateTime('2001/01/01')),
-            array(new \DateTime('2005/01/01'), '2001/01/01'),
-            array(new \DateTime('2005/01/01 UTC'), '2001/01/01 UTC'),
-            array(new ComparisonTest_Class(5), new ComparisonTest_Class(4)),
-            array('333', '22'),
-            array(null, 1),
-        );
+        return [
+            [2, 1],
+            [new \DateTime('2005/01/01'), new \DateTime('2001/01/01')],
+            [new \DateTime('2005/01/01'), '2001/01/01'],
+            [new \DateTime('2005/01/01 UTC'), '2001/01/01 UTC'],
+            [new ComparisonTest_Class(5), new ComparisonTest_Class(4)],
+            ['333', '22'],
+            [null, 1],
+        ];
     }
 
     /**
@@ -55,9 +55,9 @@ class GreaterThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(6),
-        );
+        return [
+            [6],
+        ];
     }
 
     /**
@@ -65,19 +65,19 @@ class GreaterThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(1, '1', 2, '2', 'integer'),
-            array(2, '2', 2, '2', 'integer'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2005/01/01'), 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2005/01/01', 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2000/01/01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2005/01/01 UTC', 'Jan 1, 2005, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000/01/01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-            array(new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-            array('22', '"22"', '333', '"333"', 'string'),
-            array('22', '"22"', '22', '"22"', 'string'),
-        );
+        return [
+            [1, '1', 2, '2', 'integer'],
+            [2, '2', 2, '2', 'integer'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2005/01/01'), 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2005/01/01', 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01'), 'Jan 1, 2000, 12:00 AM', '2000/01/01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2005/01/01 UTC', 'Jan 1, 2005, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000/01/01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000/01/01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+            [new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+            ['22', '"22"', '333', '"333"', 'string'],
+            ['22', '"22"', '22', '"22"', 'string'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php b/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
index 98653274a9..7803a73cc9 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/GroupSequenceTest.php
@@ -21,15 +21,15 @@ class GroupSequenceTest extends TestCase
 {
     public function testCreate()
     {
-        $sequence = new GroupSequence(array('Group 1', 'Group 2'));
+        $sequence = new GroupSequence(['Group 1', 'Group 2']);
 
-        $this->assertSame(array('Group 1', 'Group 2'), $sequence->groups);
+        $this->assertSame(['Group 1', 'Group 2'], $sequence->groups);
     }
 
     public function testCreateDoctrineStyle()
     {
-        $sequence = new GroupSequence(array('value' => array('Group 1', 'Group 2')));
+        $sequence = new GroupSequence(['value' => ['Group 1', 'Group 2']]);
 
-        $this->assertSame(array('Group 1', 'Group 2'), $sequence->groups);
+        $this->assertSame(['Group 1', 'Group 2'], $sequence->groups);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
index e5c63c3654..ba426799ca 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
@@ -48,116 +48,116 @@ class IbanValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidIbans()
     {
-        return array(
-            array('CH9300762011623852957'), // Switzerland without spaces
-            array('CH93  0076 2011 6238 5295 7'), // Switzerland with multiple spaces
+        return [
+            ['CH9300762011623852957'], // Switzerland without spaces
+            ['CH93  0076 2011 6238 5295 7'], // Switzerland with multiple spaces
 
             // Country list
             // http://www.rbs.co.uk/corporate/international/g0/guide-to-international-business/regulatory-information/iban/iban-example.ashx
 
-            array('AL47 2121 1009 0000 0002 3569 8741'), //Albania
-            array('AD12 0001 2030 2003 5910 0100'), //Andorra
-            array('AT61 1904 3002 3457 3201'), //Austria
-            array('AZ21 NABZ 0000 0000 1370 1000 1944'), //Azerbaijan
-            array('BH67 BMAG 0000 1299 1234 56'), //Bahrain
-            array('BE62 5100 0754 7061'), //Belgium
-            array('BA39 1290 0794 0102 8494'), //Bosnia and Herzegovina
-            array('BG80 BNBG 9661 1020 3456 78'), //Bulgaria
-            array('BY 13 NBRB 3600 900000002Z00AB00'), //Belarus
-            array('BY13 NBRB 3600 900000002Z00AB00'), //Belarus
-            array('BY22NB23324232T78YR7823HR32U'), //Belarus
-            array('HR12 1001 0051 8630 0016 0'), //Croatia
-            array('CY17 0020 0128 0000 0012 0052 7600'), //Cyprus
-            array('CZ65 0800 0000 1920 0014 5399'), //Czech Republic
-            array('DK50 0040 0440 1162 43'), //Denmark
-            array('EE38 2200 2210 2014 5685'), //Estonia
-            array('FO97 5432 0388 8999 44'), //Faroe Islands
-            array('FI21 1234 5600 0007 85'), //Finland
-            array('FR14 2004 1010 0505 0001 3M02 606'), //France
-            array('GE29 NB00 0000 0101 9049 17'), //Georgia
-            array('DE89 3704 0044 0532 0130 00'), //Germany
-            array('GI75 NWBK 0000 0000 7099 453'), //Gibraltar
-            array('GR16 0110 1250 0000 0001 2300 695'), //Greece
-            array('GL56 0444 9876 5432 10'), //Greenland
-            array('HU42 1177 3016 1111 1018 0000 0000'), //Hungary
-            array('IS14 0159 2600 7654 5510 7303 39'), //Iceland
-            array('IE29 AIBK 9311 5212 3456 78'), //Ireland
-            array('IL62 0108 0000 0009 9999 999'), //Israel
-            array('IT40 S054 2811 1010 0000 0123 456'), //Italy
-            array('LV80 BANK 0000 4351 9500 1'), //Latvia
-            array('LB62 0999 0000 0001 0019 0122 9114'), //Lebanon
-            array('LI21 0881 0000 2324 013A A'), //Liechtenstein
-            array('LT12 1000 0111 0100 1000'), //Lithuania
-            array('LU28 0019 4006 4475 0000'), //Luxembourg
-            array('MK072 5012 0000 0589 84'), //Macedonia
-            array('MT84 MALT 0110 0001 2345 MTLC AST0 01S'), //Malta
-            array('MU17 BOMM 0101 1010 3030 0200 000M UR'), //Mauritius
-            array('MD24 AG00 0225 1000 1310 4168'), //Moldova
-            array('MC93 2005 2222 1001 1223 3M44 555'), //Monaco
-            array('ME25 5050 0001 2345 6789 51'), //Montenegro
-            array('NL39 RABO 0300 0652 64'), //Netherlands
-            array('NO93 8601 1117 947'), //Norway
-            array('PK36 SCBL 0000 0011 2345 6702'), //Pakistan
-            array('PL60 1020 1026 0000 0422 7020 1111'), //Poland
-            array('PT50 0002 0123 1234 5678 9015 4'), //Portugal
-            array('RO49 AAAA 1B31 0075 9384 0000'), //Romania
-            array('SM86 U032 2509 8000 0000 0270 100'), //San Marino
-            array('SA03 8000 0000 6080 1016 7519'), //Saudi Arabia
-            array('RS35 2600 0560 1001 6113 79'), //Serbia
-            array('SK31 1200 0000 1987 4263 7541'), //Slovak Republic
-            array('SI56 1910 0000 0123 438'), //Slovenia
-            array('ES80 2310 0001 1800 0001 2345'), //Spain
-            array('SE35 5000 0000 0549 1000 0003'), //Sweden
-            array('CH93 0076 2011 6238 5295 7'), //Switzerland
-            array('TN59 1000 6035 1835 9847 8831'), //Tunisia
-            array('TR33 0006 1005 1978 6457 8413 26'), //Turkey
-            array('AE07 0331 2345 6789 0123 456'), //UAE
-            array('GB12 CPBK 0892 9965 0449 91'), //United Kingdom
+            ['AL47 2121 1009 0000 0002 3569 8741'], //Albania
+            ['AD12 0001 2030 2003 5910 0100'], //Andorra
+            ['AT61 1904 3002 3457 3201'], //Austria
+            ['AZ21 NABZ 0000 0000 1370 1000 1944'], //Azerbaijan
+            ['BH67 BMAG 0000 1299 1234 56'], //Bahrain
+            ['BE62 5100 0754 7061'], //Belgium
+            ['BA39 1290 0794 0102 8494'], //Bosnia and Herzegovina
+            ['BG80 BNBG 9661 1020 3456 78'], //Bulgaria
+            ['BY 13 NBRB 3600 900000002Z00AB00'], //Belarus
+            ['BY13 NBRB 3600 900000002Z00AB00'], //Belarus
+            ['BY22NB23324232T78YR7823HR32U'], //Belarus
+            ['HR12 1001 0051 8630 0016 0'], //Croatia
+            ['CY17 0020 0128 0000 0012 0052 7600'], //Cyprus
+            ['CZ65 0800 0000 1920 0014 5399'], //Czech Republic
+            ['DK50 0040 0440 1162 43'], //Denmark
+            ['EE38 2200 2210 2014 5685'], //Estonia
+            ['FO97 5432 0388 8999 44'], //Faroe Islands
+            ['FI21 1234 5600 0007 85'], //Finland
+            ['FR14 2004 1010 0505 0001 3M02 606'], //France
+            ['GE29 NB00 0000 0101 9049 17'], //Georgia
+            ['DE89 3704 0044 0532 0130 00'], //Germany
+            ['GI75 NWBK 0000 0000 7099 453'], //Gibraltar
+            ['GR16 0110 1250 0000 0001 2300 695'], //Greece
+            ['GL56 0444 9876 5432 10'], //Greenland
+            ['HU42 1177 3016 1111 1018 0000 0000'], //Hungary
+            ['IS14 0159 2600 7654 5510 7303 39'], //Iceland
+            ['IE29 AIBK 9311 5212 3456 78'], //Ireland
+            ['IL62 0108 0000 0009 9999 999'], //Israel
+            ['IT40 S054 2811 1010 0000 0123 456'], //Italy
+            ['LV80 BANK 0000 4351 9500 1'], //Latvia
+            ['LB62 0999 0000 0001 0019 0122 9114'], //Lebanon
+            ['LI21 0881 0000 2324 013A A'], //Liechtenstein
+            ['LT12 1000 0111 0100 1000'], //Lithuania
+            ['LU28 0019 4006 4475 0000'], //Luxembourg
+            ['MK072 5012 0000 0589 84'], //Macedonia
+            ['MT84 MALT 0110 0001 2345 MTLC AST0 01S'], //Malta
+            ['MU17 BOMM 0101 1010 3030 0200 000M UR'], //Mauritius
+            ['MD24 AG00 0225 1000 1310 4168'], //Moldova
+            ['MC93 2005 2222 1001 1223 3M44 555'], //Monaco
+            ['ME25 5050 0001 2345 6789 51'], //Montenegro
+            ['NL39 RABO 0300 0652 64'], //Netherlands
+            ['NO93 8601 1117 947'], //Norway
+            ['PK36 SCBL 0000 0011 2345 6702'], //Pakistan
+            ['PL60 1020 1026 0000 0422 7020 1111'], //Poland
+            ['PT50 0002 0123 1234 5678 9015 4'], //Portugal
+            ['RO49 AAAA 1B31 0075 9384 0000'], //Romania
+            ['SM86 U032 2509 8000 0000 0270 100'], //San Marino
+            ['SA03 8000 0000 6080 1016 7519'], //Saudi Arabia
+            ['RS35 2600 0560 1001 6113 79'], //Serbia
+            ['SK31 1200 0000 1987 4263 7541'], //Slovak Republic
+            ['SI56 1910 0000 0123 438'], //Slovenia
+            ['ES80 2310 0001 1800 0001 2345'], //Spain
+            ['SE35 5000 0000 0549 1000 0003'], //Sweden
+            ['CH93 0076 2011 6238 5295 7'], //Switzerland
+            ['TN59 1000 6035 1835 9847 8831'], //Tunisia
+            ['TR33 0006 1005 1978 6457 8413 26'], //Turkey
+            ['AE07 0331 2345 6789 0123 456'], //UAE
+            ['GB12 CPBK 0892 9965 0449 91'], //United Kingdom
 
             //Extended country list
             //http://www.nordea.com/Our+services/International+products+and+services/Cash+Management/IBAN+countries/908462.html
             // https://www.swift.com/sites/default/files/resources/iban_registry.pdf
-            array('AO06000600000100037131174'), //Angola
-            array('AZ21NABZ00000000137010001944'), //Azerbaijan
-            array('BH29BMAG1299123456BH00'), //Bahrain
-            array('BJ11B00610100400271101192591'), //Benin
-            array('BR9700360305000010009795493P1'), // Brazil
-            array('BR1800000000141455123924100C2'), // Brazil
-            array('VG96VPVG0000012345678901'), //British Virgin Islands
-            array('BF1030134020015400945000643'), //Burkina Faso
-            array('BI43201011067444'), //Burundi
-            array('CM2110003001000500000605306'), //Cameroon
-            array('CV64000300004547069110176'), //Cape Verde
-            array('FR7630007000110009970004942'), //Central African Republic
-            array('CG5230011000202151234567890'), //Congo
-            array('CR05015202001026284066'), //Costa Rica
-            array('DO28BAGR00000001212453611324'), //Dominican Republic
-            array('GT82TRAJ01020000001210029690'), //Guatemala
-            array('IR580540105180021273113007'), //Iran
-            array('IL620108000000099999999'), //Israel
-            array('CI05A00060174100178530011852'), //Ivory Coast
-            array('JO94CBJO0010000000000131000302'), // Jordan
-            array('KZ176010251000042993'), //Kazakhstan
-            array('KW74NBOK0000000000001000372151'), //Kuwait
-            array('LB30099900000001001925579115'), //Lebanon
-            array('MG4600005030010101914016056'), //Madagascar
-            array('ML03D00890170001002120000447'), //Mali
-            array('MR1300012000010000002037372'), //Mauritania
-            array('MU17BOMM0101101030300200000MUR'), //Mauritius
-            array('MZ59000100000011834194157'), //Mozambique
-            array('PS92PALS000000000400123456702'), //Palestinian Territory
-            array('QA58DOHB00001234567890ABCDEFG'), //Qatar
-            array('XK051212012345678906'), //Republic of Kosovo
-            array('PT50000200000163099310355'), //Sao Tome and Principe
-            array('SA0380000000608010167519'), //Saudi Arabia
-            array('SN12K00100152000025690007542'), //Senegal
-            array('TL380080012345678910157'), //Timor-Leste
-            array('TN5914207207100707129648'), //Tunisia
-            array('TR330006100519786457841326'), //Turkey
-            array('UA213223130000026007233566001'), //Ukraine
-            array('AE260211000000230064016'), //United Arab Emirates
-            array('VA59001123000012345678'), //Vatican City State
-        );
+            ['AO06000600000100037131174'], //Angola
+            ['AZ21NABZ00000000137010001944'], //Azerbaijan
+            ['BH29BMAG1299123456BH00'], //Bahrain
+            ['BJ11B00610100400271101192591'], //Benin
+            ['BR9700360305000010009795493P1'], // Brazil
+            ['BR1800000000141455123924100C2'], // Brazil
+            ['VG96VPVG0000012345678901'], //British Virgin Islands
+            ['BF1030134020015400945000643'], //Burkina Faso
+            ['BI43201011067444'], //Burundi
+            ['CM2110003001000500000605306'], //Cameroon
+            ['CV64000300004547069110176'], //Cape Verde
+            ['FR7630007000110009970004942'], //Central African Republic
+            ['CG5230011000202151234567890'], //Congo
+            ['CR05015202001026284066'], //Costa Rica
+            ['DO28BAGR00000001212453611324'], //Dominican Republic
+            ['GT82TRAJ01020000001210029690'], //Guatemala
+            ['IR580540105180021273113007'], //Iran
+            ['IL620108000000099999999'], //Israel
+            ['CI05A00060174100178530011852'], //Ivory Coast
+            ['JO94CBJO0010000000000131000302'], // Jordan
+            ['KZ176010251000042993'], //Kazakhstan
+            ['KW74NBOK0000000000001000372151'], //Kuwait
+            ['LB30099900000001001925579115'], //Lebanon
+            ['MG4600005030010101914016056'], //Madagascar
+            ['ML03D00890170001002120000447'], //Mali
+            ['MR1300012000010000002037372'], //Mauritania
+            ['MU17BOMM0101101030300200000MUR'], //Mauritius
+            ['MZ59000100000011834194157'], //Mozambique
+            ['PS92PALS000000000400123456702'], //Palestinian Territory
+            ['QA58DOHB00001234567890ABCDEFG'], //Qatar
+            ['XK051212012345678906'], //Republic of Kosovo
+            ['PT50000200000163099310355'], //Sao Tome and Principe
+            ['SA0380000000608010167519'], //Saudi Arabia
+            ['SN12K00100152000025690007542'], //Senegal
+            ['TL380080012345678910157'], //Timor-Leste
+            ['TN5914207207100707129648'], //Tunisia
+            ['TR330006100519786457841326'], //Turkey
+            ['UA213223130000026007233566001'], //Ukraine
+            ['AE260211000000230064016'], //United Arab Emirates
+            ['VA59001123000012345678'], //Vatican City State
+        ];
     }
 
     /**
@@ -170,113 +170,113 @@ class IbanValidatorTest extends ConstraintValidatorTestCase
 
     public function getIbansWithInvalidFormat()
     {
-        return array(
-            array('AL47 2121 1009 0000 0002 3569 874'), //Albania
-            array('AD12 0001 2030 2003 5910 010'), //Andorra
-            array('AT61 1904 3002 3457 320'), //Austria
-            array('AZ21 NABZ 0000 0000 1370 1000 194'), //Azerbaijan
-            array('AZ21 N1BZ 0000 0000 1370 1000 1944'), //Azerbaijan
-            array('BH67 BMAG 0000 1299 1234 5'), //Bahrain
-            array('BH67 B2AG 0000 1299 1234 56'), //Bahrain
-            array('BE62 5100 0754 7061 2'), //Belgium
-            array('BA39 1290 0794 0102 8494 4'), //Bosnia and Herzegovina
-            array('BG80 BNBG 9661 1020 3456 7'), //Bulgaria
-            array('BG80 B2BG 9661 1020 3456 78'), //Bulgaria
-            array('BY 13 NBRB 3600 900000002Z00AB001'), //Belarus
-            array('BY 13 NBRB 3600 900000002Z00AB0'), //Belarus
-            array('BYRO NBRB 3600 900000002Z00AB0'), //Belarus
-            array('BY 13 3600 NBRB 900000002Z00AB05'), //Belarus
-            array('HR12 1001 0051 8630 0016 01'), //Croatia
-            array('CY17 0020 0128 0000 0012 0052 7600 1'), //Cyprus
-            array('CZ65 0800 0000 1920 0014 5399 1'), //Czech Republic
-            array('DK50 0040 0440 1162 431'), //Denmark
-            array('EE38 2200 2210 2014 5685 1'), //Estonia
-            array('FO97 5432 0388 8999 441'), //Faroe Islands
-            array('FI21 1234 5600 0007 851'), //Finland
-            array('FR14 2004 1010 0505 0001 3M02 6061'), //France
-            array('GE29 NB00 0000 0101 9049 171'), //Georgia
-            array('DE89 3704 0044 0532 0130 001'), //Germany
-            array('GI75 NWBK 0000 0000 7099 4531'), //Gibraltar
-            array('GR16 0110 1250 0000 0001 2300 6951'), //Greece
-            array('GL56 0444 9876 5432 101'), //Greenland
-            array('HU42 1177 3016 1111 1018 0000 0000 1'), //Hungary
-            array('IS14 0159 2600 7654 5510 7303 391'), //Iceland
-            array('IE29 AIBK 9311 5212 3456 781'), //Ireland
-            array('IL62 0108 0000 0009 9999 9991'), //Israel
-            array('IT40 S054 2811 1010 0000 0123 4561'), //Italy
-            array('LV80 BANK 0000 4351 9500 11'), //Latvia
-            array('LB62 0999 0000 0001 0019 0122 9114 1'), //Lebanon
-            array('LI21 0881 0000 2324 013A A1'), //Liechtenstein
-            array('LT12 1000 0111 0100 1000 1'), //Lithuania
-            array('LU28 0019 4006 4475 0000 1'), //Luxembourg
-            array('MK072 5012 0000 0589 84 1'), //Macedonia
-            array('MT84 MALT 0110 0001 2345 MTLC AST0 01SA'), //Malta
-            array('MU17 BOMM 0101 1010 3030 0200 000M URA'), //Mauritius
-            array('MD24 AG00 0225 1000 1310 4168 1'), //Moldova
-            array('MC93 2005 2222 1001 1223 3M44 5551'), //Monaco
-            array('ME25 5050 0001 2345 6789 511'), //Montenegro
-            array('NL39 RABO 0300 0652 641'), //Netherlands
-            array('NO93 8601 1117 9471'), //Norway
-            array('PK36 SCBL 0000 0011 2345 6702 1'), //Pakistan
-            array('PL60 1020 1026 0000 0422 7020 1111 1'), //Poland
-            array('PT50 0002 0123 1234 5678 9015 41'), //Portugal
-            array('RO49 AAAA 1B31 0075 9384 0000 1'), //Romania
-            array('SM86 U032 2509 8000 0000 0270 1001'), //San Marino
-            array('SA03 8000 0000 6080 1016 7519 1'), //Saudi Arabia
-            array('RS35 2600 0560 1001 6113 791'), //Serbia
-            array('SK31 1200 0000 1987 4263 7541 1'), //Slovak Republic
-            array('SI56 1910 0000 0123 4381'), //Slovenia
-            array('ES80 2310 0001 1800 0001 2345 1'), //Spain
-            array('SE35 5000 0000 0549 1000 0003 1'), //Sweden
-            array('CH93 0076 2011 6238 5295 71'), //Switzerland
-            array('TN59 1000 6035 1835 9847 8831 1'), //Tunisia
-            array('TR33 0006 1005 1978 6457 8413 261'), //Turkey
-            array('AE07 0331 2345 6789 0123 4561'), //UAE
-            array('GB12 CPBK 0892 9965 0449 911'), //United Kingdom
+        return [
+            ['AL47 2121 1009 0000 0002 3569 874'], //Albania
+            ['AD12 0001 2030 2003 5910 010'], //Andorra
+            ['AT61 1904 3002 3457 320'], //Austria
+            ['AZ21 NABZ 0000 0000 1370 1000 194'], //Azerbaijan
+            ['AZ21 N1BZ 0000 0000 1370 1000 1944'], //Azerbaijan
+            ['BH67 BMAG 0000 1299 1234 5'], //Bahrain
+            ['BH67 B2AG 0000 1299 1234 56'], //Bahrain
+            ['BE62 5100 0754 7061 2'], //Belgium
+            ['BA39 1290 0794 0102 8494 4'], //Bosnia and Herzegovina
+            ['BG80 BNBG 9661 1020 3456 7'], //Bulgaria
+            ['BG80 B2BG 9661 1020 3456 78'], //Bulgaria
+            ['BY 13 NBRB 3600 900000002Z00AB001'], //Belarus
+            ['BY 13 NBRB 3600 900000002Z00AB0'], //Belarus
+            ['BYRO NBRB 3600 900000002Z00AB0'], //Belarus
+            ['BY 13 3600 NBRB 900000002Z00AB05'], //Belarus
+            ['HR12 1001 0051 8630 0016 01'], //Croatia
+            ['CY17 0020 0128 0000 0012 0052 7600 1'], //Cyprus
+            ['CZ65 0800 0000 1920 0014 5399 1'], //Czech Republic
+            ['DK50 0040 0440 1162 431'], //Denmark
+            ['EE38 2200 2210 2014 5685 1'], //Estonia
+            ['FO97 5432 0388 8999 441'], //Faroe Islands
+            ['FI21 1234 5600 0007 851'], //Finland
+            ['FR14 2004 1010 0505 0001 3M02 6061'], //France
+            ['GE29 NB00 0000 0101 9049 171'], //Georgia
+            ['DE89 3704 0044 0532 0130 001'], //Germany
+            ['GI75 NWBK 0000 0000 7099 4531'], //Gibraltar
+            ['GR16 0110 1250 0000 0001 2300 6951'], //Greece
+            ['GL56 0444 9876 5432 101'], //Greenland
+            ['HU42 1177 3016 1111 1018 0000 0000 1'], //Hungary
+            ['IS14 0159 2600 7654 5510 7303 391'], //Iceland
+            ['IE29 AIBK 9311 5212 3456 781'], //Ireland
+            ['IL62 0108 0000 0009 9999 9991'], //Israel
+            ['IT40 S054 2811 1010 0000 0123 4561'], //Italy
+            ['LV80 BANK 0000 4351 9500 11'], //Latvia
+            ['LB62 0999 0000 0001 0019 0122 9114 1'], //Lebanon
+            ['LI21 0881 0000 2324 013A A1'], //Liechtenstein
+            ['LT12 1000 0111 0100 1000 1'], //Lithuania
+            ['LU28 0019 4006 4475 0000 1'], //Luxembourg
+            ['MK072 5012 0000 0589 84 1'], //Macedonia
+            ['MT84 MALT 0110 0001 2345 MTLC AST0 01SA'], //Malta
+            ['MU17 BOMM 0101 1010 3030 0200 000M URA'], //Mauritius
+            ['MD24 AG00 0225 1000 1310 4168 1'], //Moldova
+            ['MC93 2005 2222 1001 1223 3M44 5551'], //Monaco
+            ['ME25 5050 0001 2345 6789 511'], //Montenegro
+            ['NL39 RABO 0300 0652 641'], //Netherlands
+            ['NO93 8601 1117 9471'], //Norway
+            ['PK36 SCBL 0000 0011 2345 6702 1'], //Pakistan
+            ['PL60 1020 1026 0000 0422 7020 1111 1'], //Poland
+            ['PT50 0002 0123 1234 5678 9015 41'], //Portugal
+            ['RO49 AAAA 1B31 0075 9384 0000 1'], //Romania
+            ['SM86 U032 2509 8000 0000 0270 1001'], //San Marino
+            ['SA03 8000 0000 6080 1016 7519 1'], //Saudi Arabia
+            ['RS35 2600 0560 1001 6113 791'], //Serbia
+            ['SK31 1200 0000 1987 4263 7541 1'], //Slovak Republic
+            ['SI56 1910 0000 0123 4381'], //Slovenia
+            ['ES80 2310 0001 1800 0001 2345 1'], //Spain
+            ['SE35 5000 0000 0549 1000 0003 1'], //Sweden
+            ['CH93 0076 2011 6238 5295 71'], //Switzerland
+            ['TN59 1000 6035 1835 9847 8831 1'], //Tunisia
+            ['TR33 0006 1005 1978 6457 8413 261'], //Turkey
+            ['AE07 0331 2345 6789 0123 4561'], //UAE
+            ['GB12 CPBK 0892 9965 0449 911'], //United Kingdom
 
             //Extended country list
-            array('AO060006000001000371311741'), //Angola
-            array('AZ21NABZ000000001370100019441'), //Azerbaijan
-            array('BH29BMAG1299123456BH001'), //Bahrain
-            array('BJ11B006101004002711011925911'), //Benin
-            array('BR9700360305000010009795493P11'), // Brazil
-            array('BR1800000000141455123924100C21'), // Brazil
-            array('VG96VPVG00000123456789011'), //British Virgin Islands
-            array('BF10301340200154009450006431'), //Burkina Faso
-            array('BI432010110674441'), //Burundi
-            array('CM21100030010005000006053061'), //Cameroon
-            array('CV640003000045470691101761'), //Cape Verde
-            array('FR76300070001100099700049421'), //Central African Republic
-            array('CG52300110002021512345678901'), //Congo
-            array('CR05152020010262840661'), //Costa Rica
-            array('CR0515202001026284066'), //Costa Rica
-            array('DO28BAGR000000012124536113241'), //Dominican Republic
-            array('GT82TRAJ010200000012100296901'), //Guatemala
-            array('IR5805401051800212731130071'), //Iran
-            array('IL6201080000000999999991'), //Israel
-            array('CI05A000601741001785300118521'), //Ivory Coast
-            array('JO94CBJO00100000000001310003021'), // Jordan
-            array('KZ1760102510000429931'), //Kazakhstan
-            array('KW74NBOK00000000000010003721511'), //Kuwait
-            array('LB300999000000010019255791151'), //Lebanon
-            array('MG46000050300101019140160561'), //Madagascar
-            array('ML03D008901700010021200004471'), //Mali
-            array('MR13000120000100000020373721'), //Mauritania
-            array('MU17BOMM0101101030300200000MUR1'), //Mauritius
-            array('MZ590001000000118341941571'), //Mozambique
-            array('PS92PALS0000000004001234567021'), //Palestinian Territory
-            array('QA58DOHB00001234567890ABCDEFG1'), //Qatar
-            array('XK0512120123456789061'), //Republic of Kosovo
-            array('PT500002000001630993103551'), //Sao Tome and Principe
-            array('SA03800000006080101675191'), //Saudi Arabia
-            array('SN12K001001520000256900075421'), //Senegal
-            array('TL3800800123456789101571'), //Timor-Leste
-            array('TN59142072071007071296481'), //Tunisia
-            array('TR3300061005197864578413261'), //Turkey
-            array('UA21AAAA1300000260072335660012'), //Ukraine
-            array('AE2602110000002300640161'), //United Arab Emirates
-            array('VA590011230000123456781'), //Vatican City State
-        );
+            ['AO060006000001000371311741'], //Angola
+            ['AZ21NABZ000000001370100019441'], //Azerbaijan
+            ['BH29BMAG1299123456BH001'], //Bahrain
+            ['BJ11B006101004002711011925911'], //Benin
+            ['BR9700360305000010009795493P11'], // Brazil
+            ['BR1800000000141455123924100C21'], // Brazil
+            ['VG96VPVG00000123456789011'], //British Virgin Islands
+            ['BF10301340200154009450006431'], //Burkina Faso
+            ['BI432010110674441'], //Burundi
+            ['CM21100030010005000006053061'], //Cameroon
+            ['CV640003000045470691101761'], //Cape Verde
+            ['FR76300070001100099700049421'], //Central African Republic
+            ['CG52300110002021512345678901'], //Congo
+            ['CR05152020010262840661'], //Costa Rica
+            ['CR0515202001026284066'], //Costa Rica
+            ['DO28BAGR000000012124536113241'], //Dominican Republic
+            ['GT82TRAJ010200000012100296901'], //Guatemala
+            ['IR5805401051800212731130071'], //Iran
+            ['IL6201080000000999999991'], //Israel
+            ['CI05A000601741001785300118521'], //Ivory Coast
+            ['JO94CBJO00100000000001310003021'], // Jordan
+            ['KZ1760102510000429931'], //Kazakhstan
+            ['KW74NBOK00000000000010003721511'], //Kuwait
+            ['LB300999000000010019255791151'], //Lebanon
+            ['MG46000050300101019140160561'], //Madagascar
+            ['ML03D008901700010021200004471'], //Mali
+            ['MR13000120000100000020373721'], //Mauritania
+            ['MU17BOMM0101101030300200000MUR1'], //Mauritius
+            ['MZ590001000000118341941571'], //Mozambique
+            ['PS92PALS0000000004001234567021'], //Palestinian Territory
+            ['QA58DOHB00001234567890ABCDEFG1'], //Qatar
+            ['XK0512120123456789061'], //Republic of Kosovo
+            ['PT500002000001630993103551'], //Sao Tome and Principe
+            ['SA03800000006080101675191'], //Saudi Arabia
+            ['SN12K001001520000256900075421'], //Senegal
+            ['TL3800800123456789101571'], //Timor-Leste
+            ['TN59142072071007071296481'], //Tunisia
+            ['TR3300061005197864578413261'], //Turkey
+            ['UA21AAAA1300000260072335660012'], //Ukraine
+            ['AE2602110000002300640161'], //United Arab Emirates
+            ['VA590011230000123456781'], //Vatican City State
+        ];
     }
 
     /**
@@ -289,106 +289,106 @@ class IbanValidatorTest extends ConstraintValidatorTestCase
 
     public function getIbansWithValidFormatButIncorrectChecksum()
     {
-        return array(
-            array('AL47 2121 1009 0000 0002 3569 8742'), //Albania
-            array('AD12 0001 2030 2003 5910 0101'), //Andorra
-            array('AT61 1904 3002 3457 3202'), //Austria
-            array('AZ21 NABZ 0000 0000 1370 1000 1945'), //Azerbaijan
-            array('BH67 BMAG 0000 1299 1234 57'), //Bahrain
-            array('BE62 5100 0754 7062'), //Belgium
-            array('BA39 1290 0794 0102 8495'), //Bosnia and Herzegovina
-            array('BG80 BNBG 9661 1020 3456 79'), //Bulgaria
-            array('BY90 NBRB 3600 900000002Z00AB00'), //Belarus
-            array('HR12 1001 0051 8630 0016 1'), //Croatia
-            array('CY17 0020 0128 0000 0012 0052 7601'), //Cyprus
-            array('CZ65 0800 0000 1920 0014 5398'), //Czech Republic
-            array('DK50 0040 0440 1162 44'), //Denmark
-            array('EE38 2200 2210 2014 5684'), //Estonia
-            array('FO97 5432 0388 8999 43'), //Faroe Islands
-            array('FI21 1234 5600 0007 84'), //Finland
-            array('FR14 2004 1010 0505 0001 3M02 605'), //France
-            array('GE29 NB00 0000 0101 9049 16'), //Georgia
-            array('DE89 3704 0044 0532 0130 01'), //Germany
-            array('GI75 NWBK 0000 0000 7099 452'), //Gibraltar
-            array('GR16 0110 1250 0000 0001 2300 694'), //Greece
-            array('GL56 0444 9876 5432 11'), //Greenland
-            array('HU42 1177 3016 1111 1018 0000 0001'), //Hungary
-            array('IS14 0159 2600 7654 5510 7303 38'), //Iceland
-            array('IE29 AIBK 9311 5212 3456 79'), //Ireland
-            array('IL62 0108 0000 0009 9999 998'), //Israel
-            array('IT40 S054 2811 1010 0000 0123 457'), //Italy
-            array('LV80 BANK 0000 4351 9500 2'), //Latvia
-            array('LB62 0999 0000 0001 0019 0122 9115'), //Lebanon
-            array('LI21 0881 0000 2324 013A B'), //Liechtenstein
-            array('LT12 1000 0111 0100 1001'), //Lithuania
-            array('LU28 0019 4006 4475 0001'), //Luxembourg
-            array('MK072 5012 0000 0589 85'), //Macedonia
-            array('MT84 MALT 0110 0001 2345 MTLC AST0 01T'), //Malta
-            array('MU17 BOMM 0101 1010 3030 0200 000M UP'), //Mauritius
-            array('MD24 AG00 0225 1000 1310 4169'), //Moldova
-            array('MC93 2005 2222 1001 1223 3M44 554'), //Monaco
-            array('ME25 5050 0001 2345 6789 52'), //Montenegro
-            array('NL39 RABO 0300 0652 65'), //Netherlands
-            array('NO93 8601 1117 948'), //Norway
-            array('PK36 SCBL 0000 0011 2345 6703'), //Pakistan
-            array('PL60 1020 1026 0000 0422 7020 1112'), //Poland
-            array('PT50 0002 0123 1234 5678 9015 5'), //Portugal
-            array('RO49 AAAA 1B31 0075 9384 0001'), //Romania
-            array('SM86 U032 2509 8000 0000 0270 101'), //San Marino
-            array('SA03 8000 0000 6080 1016 7518'), //Saudi Arabia
-            array('RS35 2600 0560 1001 6113 78'), //Serbia
-            array('SK31 1200 0000 1987 4263 7542'), //Slovak Republic
-            array('SI56 1910 0000 0123 439'), //Slovenia
-            array('ES80 2310 0001 1800 0001 2346'), //Spain
-            array('SE35 5000 0000 0549 1000 0004'), //Sweden
-            array('CH93 0076 2011 6238 5295 8'), //Switzerland
-            array('TN59 1000 6035 1835 9847 8832'), //Tunisia
-            array('TR33 0006 1005 1978 6457 8413 27'), //Turkey
-            array('AE07 0331 2345 6789 0123 457'), //UAE
-            array('GB12 CPBK 0892 9965 0449 92'), //United Kingdom
+        return [
+            ['AL47 2121 1009 0000 0002 3569 8742'], //Albania
+            ['AD12 0001 2030 2003 5910 0101'], //Andorra
+            ['AT61 1904 3002 3457 3202'], //Austria
+            ['AZ21 NABZ 0000 0000 1370 1000 1945'], //Azerbaijan
+            ['BH67 BMAG 0000 1299 1234 57'], //Bahrain
+            ['BE62 5100 0754 7062'], //Belgium
+            ['BA39 1290 0794 0102 8495'], //Bosnia and Herzegovina
+            ['BG80 BNBG 9661 1020 3456 79'], //Bulgaria
+            ['BY90 NBRB 3600 900000002Z00AB00'], //Belarus
+            ['HR12 1001 0051 8630 0016 1'], //Croatia
+            ['CY17 0020 0128 0000 0012 0052 7601'], //Cyprus
+            ['CZ65 0800 0000 1920 0014 5398'], //Czech Republic
+            ['DK50 0040 0440 1162 44'], //Denmark
+            ['EE38 2200 2210 2014 5684'], //Estonia
+            ['FO97 5432 0388 8999 43'], //Faroe Islands
+            ['FI21 1234 5600 0007 84'], //Finland
+            ['FR14 2004 1010 0505 0001 3M02 605'], //France
+            ['GE29 NB00 0000 0101 9049 16'], //Georgia
+            ['DE89 3704 0044 0532 0130 01'], //Germany
+            ['GI75 NWBK 0000 0000 7099 452'], //Gibraltar
+            ['GR16 0110 1250 0000 0001 2300 694'], //Greece
+            ['GL56 0444 9876 5432 11'], //Greenland
+            ['HU42 1177 3016 1111 1018 0000 0001'], //Hungary
+            ['IS14 0159 2600 7654 5510 7303 38'], //Iceland
+            ['IE29 AIBK 9311 5212 3456 79'], //Ireland
+            ['IL62 0108 0000 0009 9999 998'], //Israel
+            ['IT40 S054 2811 1010 0000 0123 457'], //Italy
+            ['LV80 BANK 0000 4351 9500 2'], //Latvia
+            ['LB62 0999 0000 0001 0019 0122 9115'], //Lebanon
+            ['LI21 0881 0000 2324 013A B'], //Liechtenstein
+            ['LT12 1000 0111 0100 1001'], //Lithuania
+            ['LU28 0019 4006 4475 0001'], //Luxembourg
+            ['MK072 5012 0000 0589 85'], //Macedonia
+            ['MT84 MALT 0110 0001 2345 MTLC AST0 01T'], //Malta
+            ['MU17 BOMM 0101 1010 3030 0200 000M UP'], //Mauritius
+            ['MD24 AG00 0225 1000 1310 4169'], //Moldova
+            ['MC93 2005 2222 1001 1223 3M44 554'], //Monaco
+            ['ME25 5050 0001 2345 6789 52'], //Montenegro
+            ['NL39 RABO 0300 0652 65'], //Netherlands
+            ['NO93 8601 1117 948'], //Norway
+            ['PK36 SCBL 0000 0011 2345 6703'], //Pakistan
+            ['PL60 1020 1026 0000 0422 7020 1112'], //Poland
+            ['PT50 0002 0123 1234 5678 9015 5'], //Portugal
+            ['RO49 AAAA 1B31 0075 9384 0001'], //Romania
+            ['SM86 U032 2509 8000 0000 0270 101'], //San Marino
+            ['SA03 8000 0000 6080 1016 7518'], //Saudi Arabia
+            ['RS35 2600 0560 1001 6113 78'], //Serbia
+            ['SK31 1200 0000 1987 4263 7542'], //Slovak Republic
+            ['SI56 1910 0000 0123 439'], //Slovenia
+            ['ES80 2310 0001 1800 0001 2346'], //Spain
+            ['SE35 5000 0000 0549 1000 0004'], //Sweden
+            ['CH93 0076 2011 6238 5295 8'], //Switzerland
+            ['TN59 1000 6035 1835 9847 8832'], //Tunisia
+            ['TR33 0006 1005 1978 6457 8413 27'], //Turkey
+            ['AE07 0331 2345 6789 0123 457'], //UAE
+            ['GB12 CPBK 0892 9965 0449 92'], //United Kingdom
 
             //Extended country list
-            array('AO06000600000100037131175'), //Angola
-            array('AZ21NABZ00000000137010001945'), //Azerbaijan
-            array('BH29BMAG1299123456BH01'), //Bahrain
-            array('BJ11B00610100400271101192592'), //Benin
-            array('BR9700360305000010009795493P2'), // Brazil
-            array('BR1800000000141455123924100C3'), // Brazil
-            array('VG96VPVG0000012345678902'), //British Virgin Islands
-            array('BF1030134020015400945000644'), //Burkina Faso
-            array('BI43201011067445'), //Burundi
-            array('CM2110003001000500000605307'), //Cameroon
-            array('CV64000300004547069110177'), //Cape Verde
-            array('FR7630007000110009970004943'), //Central African Republic
-            array('CG5230011000202151234567891'), //Congo
-            array('CR96042332432534543564'), //Costa Rica
-            array('DO28BAGR00000001212453611325'), //Dominican Republic
-            array('GT82TRAJ01020000001210029691'), //Guatemala
-            array('IR580540105180021273113008'), //Iran
-            array('IL620108000000099999998'), //Israel
-            array('CI05A00060174100178530011853'), //Ivory Coast
-            array('JO94CBJO0010000000000131000303'), // Jordan
-            array('KZ176010251000042994'), //Kazakhstan
-            array('KW74NBOK0000000000001000372152'), //Kuwait
-            array('LB30099900000001001925579116'), //Lebanon
-            array('MG4600005030010101914016057'), //Madagascar
-            array('ML03D00890170001002120000448'), //Mali
-            array('MR1300012000010000002037373'), //Mauritania
-            array('MU17BOMM0101101030300200000MUP'), //Mauritius
-            array('MZ59000100000011834194158'), //Mozambique
-            array('PS92PALS000000000400123456703'), //Palestinian Territory
-            array('QA58DOHB00001234567890ABCDEFH'), //Qatar
-            array('XK051212012345678907'), //Republic of Kosovo
-            array('PT50000200000163099310356'), //Sao Tome and Principe
-            array('SA0380000000608010167518'), //Saudi Arabia
-            array('SN12K00100152000025690007543'), //Senegal
-            array('TL380080012345678910158'), //Timor-Leste
-            array('TN5914207207100707129649'), //Tunisia
-            array('TR330006100519786457841327'), //Turkey
-            array('UA213223130000026007233566002'), //Ukraine
-            array('AE260211000000230064017'), //United Arab Emirates
-            array('VA59001123000012345671'), //Vatican City State
-        );
+            ['AO06000600000100037131175'], //Angola
+            ['AZ21NABZ00000000137010001945'], //Azerbaijan
+            ['BH29BMAG1299123456BH01'], //Bahrain
+            ['BJ11B00610100400271101192592'], //Benin
+            ['BR9700360305000010009795493P2'], // Brazil
+            ['BR1800000000141455123924100C3'], // Brazil
+            ['VG96VPVG0000012345678902'], //British Virgin Islands
+            ['BF1030134020015400945000644'], //Burkina Faso
+            ['BI43201011067445'], //Burundi
+            ['CM2110003001000500000605307'], //Cameroon
+            ['CV64000300004547069110177'], //Cape Verde
+            ['FR7630007000110009970004943'], //Central African Republic
+            ['CG5230011000202151234567891'], //Congo
+            ['CR96042332432534543564'], //Costa Rica
+            ['DO28BAGR00000001212453611325'], //Dominican Republic
+            ['GT82TRAJ01020000001210029691'], //Guatemala
+            ['IR580540105180021273113008'], //Iran
+            ['IL620108000000099999998'], //Israel
+            ['CI05A00060174100178530011853'], //Ivory Coast
+            ['JO94CBJO0010000000000131000303'], // Jordan
+            ['KZ176010251000042994'], //Kazakhstan
+            ['KW74NBOK0000000000001000372152'], //Kuwait
+            ['LB30099900000001001925579116'], //Lebanon
+            ['MG4600005030010101914016057'], //Madagascar
+            ['ML03D00890170001002120000448'], //Mali
+            ['MR1300012000010000002037373'], //Mauritania
+            ['MU17BOMM0101101030300200000MUP'], //Mauritius
+            ['MZ59000100000011834194158'], //Mozambique
+            ['PS92PALS000000000400123456703'], //Palestinian Territory
+            ['QA58DOHB00001234567890ABCDEFH'], //Qatar
+            ['XK051212012345678907'], //Republic of Kosovo
+            ['PT50000200000163099310356'], //Sao Tome and Principe
+            ['SA0380000000608010167518'], //Saudi Arabia
+            ['SN12K00100152000025690007543'], //Senegal
+            ['TL380080012345678910158'], //Timor-Leste
+            ['TN5914207207100707129649'], //Tunisia
+            ['TR330006100519786457841327'], //Turkey
+            ['UA213223130000026007233566002'], //Ukraine
+            ['AE260211000000230064017'], //United Arab Emirates
+            ['VA59001123000012345671'], //Vatican City State
+        ];
     }
 
     /**
@@ -401,13 +401,13 @@ class IbanValidatorTest extends ConstraintValidatorTestCase
 
     public function getUnsupportedCountryCodes()
     {
-        return array(
-            array('AG'),
-            array('AI'),
-            array('AQ'),
-            array('AS'),
-            array('AW'),
-        );
+        return [
+            ['AG'],
+            ['AI'],
+            ['AQ'],
+            ['AS'],
+            ['AW'],
+        ];
     }
 
     public function testIbansWithInvalidCharacters()
@@ -425,18 +425,18 @@ class IbanValidatorTest extends ConstraintValidatorTestCase
 
     public function getIbansWithInvalidCountryCode()
     {
-        return array(
-            array('0750447346'),
-            array('2X0750447346'),
-            array('A20750447346'),
-        );
+        return [
+            ['0750447346'],
+            ['2X0750447346'],
+            ['A20750447346'],
+        ];
     }
 
     private function assertViolationRaised($iban, $code)
     {
-        $constraint = new Iban(array(
+        $constraint = new Iban([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($iban, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IdenticalToValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IdenticalToValidatorTest.php
index 360eccabc7..c96ac16a91 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IdenticalToValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IdenticalToValidatorTest.php
@@ -55,16 +55,16 @@ class IdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
         $date = new \DateTime('2000-01-01');
         $object = new ComparisonTest_Class(2);
 
-        $comparisons = array(
-            array(3, 3),
-            array('a', 'a'),
-            array($date, $date),
-            array($object, $object),
-            array(null, 1),
-        );
+        $comparisons = [
+            [3, 3],
+            ['a', 'a'],
+            [$date, $date],
+            [$object, $object],
+            [null, 1],
+        ];
 
         $immutableDate = new \DateTimeImmutable('2000-01-01');
-        $comparisons[] = array($immutableDate, $immutableDate);
+        $comparisons[] = [$immutableDate, $immutableDate];
 
         return $comparisons;
     }
@@ -74,9 +74,9 @@ class IdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(5),
-        );
+        return [
+            [5],
+        ];
     }
 
     /**
@@ -84,13 +84,13 @@ class IdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(1, '1', 2, '2', 'integer'),
-            array(2, '2', '2', '"2"', 'string'),
-            array('22', '"22"', '333', '"333"', 'string'),
-            array(new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('1999-01-01'), 'Jan 1, 1999, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-        );
+        return [
+            [1, '1', 2, '2', 'integer'],
+            [2, '2', '2', '"2"', 'string'],
+            ['22', '"22"', '333', '"333"', 'string'],
+            [new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', 'DateTime'],
+            [new \DateTime('2001-01-01'), 'Jan 1, 2001, 12:00 AM', new \DateTime('1999-01-01'), 'Jan 1, 1999, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(4), '4', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ImageValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ImageValidatorTest.php
index 9d80f88d89..aa8ad4cf55 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ImageValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ImageValidatorTest.php
@@ -74,9 +74,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
     public function testFileNotFound()
     {
         // Check that the logic from FileValidator still works
-        $constraint = new Image(array(
+        $constraint = new Image([
             'notFoundMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('foobar', $constraint);
 
@@ -88,12 +88,12 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testValidSize()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minWidth' => 1,
             'maxWidth' => 2,
             'minHeight' => 1,
             'maxHeight' => 2,
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -102,10 +102,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testWidthTooSmall()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minWidth' => 3,
             'minWidthMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -118,10 +118,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testWidthTooBig()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxWidth' => 1,
             'maxWidthMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -134,10 +134,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testHeightTooSmall()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minHeight' => 3,
             'minHeightMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -150,10 +150,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testHeightTooBig()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxHeight' => 1,
             'maxHeightMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -166,10 +166,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testPixelsTooFew()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minPixels' => 5,
             'minPixelsMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -184,10 +184,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testPixelsTooMany()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxPixels' => 3,
             'maxPixelsMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -205,9 +205,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMinWidth()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minWidth' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -217,9 +217,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMaxWidth()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxWidth' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -229,9 +229,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMinHeight()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minHeight' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -241,9 +241,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMaxHeight()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxHeight' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -253,9 +253,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMinPixels()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minPixels' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -265,19 +265,19 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMaxPixels()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxPixels' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
 
     public function testRatioTooSmall()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minRatio' => 2,
             'minRatioMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -290,10 +290,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testRatioTooBig()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxRatio' => 0.5,
             'maxRatioMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -306,9 +306,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testMaxRatioUsesTwoDecimalsOnly()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxRatio' => 1.33,
-        ));
+        ]);
 
         $this->validator->validate($this->image4By3, $constraint);
 
@@ -320,9 +320,9 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMinRatio()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'minRatio' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
@@ -332,19 +332,19 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidMaxRatio()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'maxRatio' => '1abc',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
     }
 
     public function testSquareNotAllowed()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'allowSquare' => false,
             'allowSquareMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
@@ -357,10 +357,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testLandscapeNotAllowed()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'allowLandscape' => false,
             'allowLandscapeMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->imageLandscape, $constraint);
 
@@ -373,10 +373,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
 
     public function testPortraitNotAllowed()
     {
-        $constraint = new Image(array(
+        $constraint = new Image([
             'allowPortrait' => false,
             'allowPortraitMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->imagePortrait, $constraint);
 
@@ -393,10 +393,10 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
             $this->markTestSkipped('This test require GD extension');
         }
 
-        $constraint = new Image(array(
+        $constraint = new Image([
             'detectCorrupted' => true,
             'corruptedMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($this->image, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IpValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IpValidatorTest.php
index 1cd0a1b33c..06b51c3ba2 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IpValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IpValidatorTest.php
@@ -49,9 +49,9 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValidatorVersion()
     {
-        new Ip(array(
+        new Ip([
             'version' => 666,
-        ));
+        ]);
     }
 
     /**
@@ -59,25 +59,25 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidIpsV4($ip)
     {
-        $this->validator->validate($ip, new Ip(array(
+        $this->validator->validate($ip, new Ip([
             'version' => Ip::V4,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function getValidIpsV4()
     {
-        return array(
-            array('0.0.0.0'),
-            array('10.0.0.0'),
-            array('123.45.67.178'),
-            array('172.16.0.0'),
-            array('192.168.1.0'),
-            array('224.0.0.1'),
-            array('255.255.255.255'),
-            array('127.0.0.0'),
-        );
+        return [
+            ['0.0.0.0'],
+            ['10.0.0.0'],
+            ['123.45.67.178'],
+            ['172.16.0.0'],
+            ['192.168.1.0'],
+            ['224.0.0.1'],
+            ['255.255.255.255'],
+            ['127.0.0.0'],
+        ];
     }
 
     /**
@@ -85,36 +85,36 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidIpsV6($ip)
     {
-        $this->validator->validate($ip, new Ip(array(
+        $this->validator->validate($ip, new Ip([
             'version' => Ip::V6,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
 
     public function getValidIpsV6()
     {
-        return array(
-            array('2001:0db8:85a3:0000:0000:8a2e:0370:7334'),
-            array('2001:0DB8:85A3:0000:0000:8A2E:0370:7334'),
-            array('2001:0Db8:85a3:0000:0000:8A2e:0370:7334'),
-            array('fdfe:dcba:9876:ffff:fdc6:c46b:bb8f:7d4c'),
-            array('fdc6:c46b:bb8f:7d4c:fdc6:c46b:bb8f:7d4c'),
-            array('fdc6:c46b:bb8f:7d4c:0000:8a2e:0370:7334'),
-            array('fe80:0000:0000:0000:0202:b3ff:fe1e:8329'),
-            array('fe80:0:0:0:202:b3ff:fe1e:8329'),
-            array('fe80::202:b3ff:fe1e:8329'),
-            array('0:0:0:0:0:0:0:0'),
-            array('::'),
-            array('0::'),
-            array('::0'),
-            array('0::0'),
+        return [
+            ['2001:0db8:85a3:0000:0000:8a2e:0370:7334'],
+            ['2001:0DB8:85A3:0000:0000:8A2E:0370:7334'],
+            ['2001:0Db8:85a3:0000:0000:8A2e:0370:7334'],
+            ['fdfe:dcba:9876:ffff:fdc6:c46b:bb8f:7d4c'],
+            ['fdc6:c46b:bb8f:7d4c:fdc6:c46b:bb8f:7d4c'],
+            ['fdc6:c46b:bb8f:7d4c:0000:8a2e:0370:7334'],
+            ['fe80:0000:0000:0000:0202:b3ff:fe1e:8329'],
+            ['fe80:0:0:0:202:b3ff:fe1e:8329'],
+            ['fe80::202:b3ff:fe1e:8329'],
+            ['0:0:0:0:0:0:0:0'],
+            ['::'],
+            ['0::'],
+            ['::0'],
+            ['0::0'],
             // IPv4 mapped to IPv6
-            array('2001:0db8:85a3:0000:0000:8a2e:0.0.0.0'),
-            array('::0.0.0.0'),
-            array('::255.255.255.255'),
-            array('::123.45.67.178'),
-        );
+            ['2001:0db8:85a3:0000:0000:8a2e:0.0.0.0'],
+            ['::0.0.0.0'],
+            ['::255.255.255.255'],
+            ['::123.45.67.178'],
+        ];
     }
 
     /**
@@ -122,9 +122,9 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidIpsAll($ip)
     {
-        $this->validator->validate($ip, new Ip(array(
+        $this->validator->validate($ip, new Ip([
             'version' => Ip::ALL,
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
@@ -139,10 +139,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIpsV4($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V4,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -154,17 +154,17 @@ class IpValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidIpsV4()
     {
-        return array(
-            array('0'),
-            array('0.0'),
-            array('0.0.0'),
-            array('256.0.0.0'),
-            array('0.256.0.0'),
-            array('0.0.256.0'),
-            array('0.0.0.256'),
-            array('-1.0.0.0'),
-            array('foobar'),
-        );
+        return [
+            ['0'],
+            ['0.0'],
+            ['0.0.0'],
+            ['256.0.0.0'],
+            ['0.256.0.0'],
+            ['0.0.256.0'],
+            ['0.0.0.256'],
+            ['-1.0.0.0'],
+            ['foobar'],
+        ];
     }
 
     /**
@@ -172,10 +172,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPrivateIpsV4($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V4_NO_PRIV,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -187,11 +187,11 @@ class IpValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidPrivateIpsV4()
     {
-        return array(
-            array('10.0.0.0'),
-            array('172.16.0.0'),
-            array('192.168.1.0'),
-        );
+        return [
+            ['10.0.0.0'],
+            ['172.16.0.0'],
+            ['192.168.1.0'],
+        ];
     }
 
     /**
@@ -199,10 +199,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidReservedIpsV4($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V4_NO_RES,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -214,11 +214,11 @@ class IpValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidReservedIpsV4()
     {
-        return array(
-            array('0.0.0.0'),
-            array('240.0.0.1'),
-            array('255.255.255.255'),
-        );
+        return [
+            ['0.0.0.0'],
+            ['240.0.0.1'],
+            ['255.255.255.255'],
+        ];
     }
 
     /**
@@ -226,10 +226,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPublicIpsV4($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V4_ONLY_PUBLIC,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -249,10 +249,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIpsV6($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V6,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -264,21 +264,21 @@ class IpValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidIpsV6()
     {
-        return array(
-            array('z001:0db8:85a3:0000:0000:8a2e:0370:7334'),
-            array('fe80'),
-            array('fe80:8329'),
-            array('fe80:::202:b3ff:fe1e:8329'),
-            array('fe80::202:b3ff::fe1e:8329'),
+        return [
+            ['z001:0db8:85a3:0000:0000:8a2e:0370:7334'],
+            ['fe80'],
+            ['fe80:8329'],
+            ['fe80:::202:b3ff:fe1e:8329'],
+            ['fe80::202:b3ff::fe1e:8329'],
             // IPv4 mapped to IPv6
-            array('2001:0db8:85a3:0000:0000:8a2e:0370:0.0.0.0'),
-            array('::0.0'),
-            array('::0.0.0'),
-            array('::256.0.0.0'),
-            array('::0.256.0.0'),
-            array('::0.0.256.0'),
-            array('::0.0.0.256'),
-        );
+            ['2001:0db8:85a3:0000:0000:8a2e:0370:0.0.0.0'],
+            ['::0.0'],
+            ['::0.0.0'],
+            ['::256.0.0.0'],
+            ['::0.256.0.0'],
+            ['::0.0.256.0'],
+            ['::0.0.0.256'],
+        ];
     }
 
     /**
@@ -286,10 +286,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPrivateIpsV6($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V6_NO_PRIV,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -301,11 +301,11 @@ class IpValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidPrivateIpsV6()
     {
-        return array(
-            array('fdfe:dcba:9876:ffff:fdc6:c46b:bb8f:7d4c'),
-            array('fdc6:c46b:bb8f:7d4c:fdc6:c46b:bb8f:7d4c'),
-            array('fdc6:c46b:bb8f:7d4c:0000:8a2e:0370:7334'),
-        );
+        return [
+            ['fdfe:dcba:9876:ffff:fdc6:c46b:bb8f:7d4c'],
+            ['fdc6:c46b:bb8f:7d4c:fdc6:c46b:bb8f:7d4c'],
+            ['fdc6:c46b:bb8f:7d4c:0000:8a2e:0370:7334'],
+        ];
     }
 
     /**
@@ -313,10 +313,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidReservedIpsV6($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V6_NO_RES,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -339,10 +339,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPublicIpsV6($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::V6_ONLY_PUBLIC,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -362,10 +362,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIpsAll($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::ALL,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -385,10 +385,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPrivateIpsAll($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::ALL_NO_PRIV,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -408,10 +408,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidReservedIpsAll($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::ALL_NO_RES,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
@@ -431,10 +431,10 @@ class IpValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidPublicIpsAll($ip)
     {
-        $constraint = new Ip(array(
+        $constraint = new Ip([
             'version' => Ip::ALL_ONLY_PUBLIC,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($ip, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IsFalseValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IsFalseValidatorTest.php
index ab139a93fd..65aecf94be 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IsFalseValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IsFalseValidatorTest.php
@@ -38,9 +38,9 @@ class IsFalseValidatorTest extends ConstraintValidatorTestCase
 
     public function testTrueIsInvalid()
     {
-        $constraint = new IsFalse(array(
+        $constraint = new IsFalse([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(true, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IsNullValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IsNullValidatorTest.php
index 2cc289b857..60f9e95f47 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IsNullValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IsNullValidatorTest.php
@@ -34,9 +34,9 @@ class IsNullValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValues($value, $valueAsString)
     {
-        $constraint = new IsNull(array(
+        $constraint = new IsNull([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -48,15 +48,15 @@ class IsNullValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(0, '0'),
-            array(false, 'false'),
-            array(true, 'true'),
-            array('', '""'),
-            array('foo bar', '"foo bar"'),
-            array(new \DateTime(), 'object'),
-            array(new \stdClass(), 'object'),
-            array(array(), 'array'),
-        );
+        return [
+            [0, '0'],
+            [false, 'false'],
+            [true, 'true'],
+            ['', '""'],
+            ['foo bar', '"foo bar"'],
+            [new \DateTime(), 'object'],
+            [new \stdClass(), 'object'],
+            [[], 'array'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IsTrueValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IsTrueValidatorTest.php
index 821d54da29..e3e0c52b93 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IsTrueValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IsTrueValidatorTest.php
@@ -38,9 +38,9 @@ class IsTrueValidatorTest extends ConstraintValidatorTestCase
 
     public function testFalseIsInvalid()
     {
-        $constraint = new IsTrue(array(
+        $constraint = new IsTrue([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(false, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
index 0b93388850..74aaf91272 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IsbnValidatorTest.php
@@ -27,79 +27,79 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidIsbn10()
     {
-        return array(
-            array('2723442284'),
-            array('2723442276'),
-            array('2723455041'),
-            array('2070546810'),
-            array('2711858839'),
-            array('2756406767'),
-            array('2870971648'),
-            array('226623854X'),
-            array('2851806424'),
-            array('0321812700'),
-            array('0-45122-5244'),
-            array('0-4712-92311'),
-            array('0-9752298-0-X'),
-        );
+        return [
+            ['2723442284'],
+            ['2723442276'],
+            ['2723455041'],
+            ['2070546810'],
+            ['2711858839'],
+            ['2756406767'],
+            ['2870971648'],
+            ['226623854X'],
+            ['2851806424'],
+            ['0321812700'],
+            ['0-45122-5244'],
+            ['0-4712-92311'],
+            ['0-9752298-0-X'],
+        ];
     }
 
     public function getInvalidIsbn10()
     {
-        return array(
-            array('27234422841', Isbn::TOO_LONG_ERROR),
-            array('272344228', Isbn::TOO_SHORT_ERROR),
-            array('0-4712-9231', Isbn::TOO_SHORT_ERROR),
-            array('1234567890', Isbn::CHECKSUM_FAILED_ERROR),
-            array('0987656789', Isbn::CHECKSUM_FAILED_ERROR),
-            array('7-35622-5444', Isbn::CHECKSUM_FAILED_ERROR),
-            array('0-4X19-92611', Isbn::CHECKSUM_FAILED_ERROR),
-            array('0_45122_5244', Isbn::INVALID_CHARACTERS_ERROR),
-            array('2870#971#648', Isbn::INVALID_CHARACTERS_ERROR),
-            array('0-9752298-0-x', Isbn::INVALID_CHARACTERS_ERROR),
-            array('1A34567890', Isbn::INVALID_CHARACTERS_ERROR),
+        return [
+            ['27234422841', Isbn::TOO_LONG_ERROR],
+            ['272344228', Isbn::TOO_SHORT_ERROR],
+            ['0-4712-9231', Isbn::TOO_SHORT_ERROR],
+            ['1234567890', Isbn::CHECKSUM_FAILED_ERROR],
+            ['0987656789', Isbn::CHECKSUM_FAILED_ERROR],
+            ['7-35622-5444', Isbn::CHECKSUM_FAILED_ERROR],
+            ['0-4X19-92611', Isbn::CHECKSUM_FAILED_ERROR],
+            ['0_45122_5244', Isbn::INVALID_CHARACTERS_ERROR],
+            ['2870#971#648', Isbn::INVALID_CHARACTERS_ERROR],
+            ['0-9752298-0-x', Isbn::INVALID_CHARACTERS_ERROR],
+            ['1A34567890', Isbn::INVALID_CHARACTERS_ERROR],
             // chr(1) evaluates to 0
             // 2070546810 is valid
-            array('2'.\chr(1).'70546810', Isbn::INVALID_CHARACTERS_ERROR),
-        );
+            ['2'.\chr(1).'70546810', Isbn::INVALID_CHARACTERS_ERROR],
+        ];
     }
 
     public function getValidIsbn13()
     {
-        return array(
-            array('978-2723442282'),
-            array('978-2723442275'),
-            array('978-2723455046'),
-            array('978-2070546817'),
-            array('978-2711858835'),
-            array('978-2756406763'),
-            array('978-2870971642'),
-            array('978-2266238540'),
-            array('978-2851806420'),
-            array('978-0321812704'),
-            array('978-0451225245'),
-            array('978-0471292319'),
-        );
+        return [
+            ['978-2723442282'],
+            ['978-2723442275'],
+            ['978-2723455046'],
+            ['978-2070546817'],
+            ['978-2711858835'],
+            ['978-2756406763'],
+            ['978-2870971642'],
+            ['978-2266238540'],
+            ['978-2851806420'],
+            ['978-0321812704'],
+            ['978-0451225245'],
+            ['978-0471292319'],
+        ];
     }
 
     public function getInvalidIsbn13()
     {
-        return array(
-            array('978-27234422821', Isbn::TOO_LONG_ERROR),
-            array('978-272344228', Isbn::TOO_SHORT_ERROR),
-            array('978-2723442-82', Isbn::TOO_SHORT_ERROR),
-            array('978-2723442281', Isbn::CHECKSUM_FAILED_ERROR),
-            array('978-0321513774', Isbn::CHECKSUM_FAILED_ERROR),
-            array('979-0431225385', Isbn::CHECKSUM_FAILED_ERROR),
-            array('980-0474292319', Isbn::CHECKSUM_FAILED_ERROR),
-            array('0-4X19-92619812', Isbn::INVALID_CHARACTERS_ERROR),
-            array('978_2723442282', Isbn::INVALID_CHARACTERS_ERROR),
-            array('978#2723442282', Isbn::INVALID_CHARACTERS_ERROR),
-            array('978-272C442282', Isbn::INVALID_CHARACTERS_ERROR),
+        return [
+            ['978-27234422821', Isbn::TOO_LONG_ERROR],
+            ['978-272344228', Isbn::TOO_SHORT_ERROR],
+            ['978-2723442-82', Isbn::TOO_SHORT_ERROR],
+            ['978-2723442281', Isbn::CHECKSUM_FAILED_ERROR],
+            ['978-0321513774', Isbn::CHECKSUM_FAILED_ERROR],
+            ['979-0431225385', Isbn::CHECKSUM_FAILED_ERROR],
+            ['980-0474292319', Isbn::CHECKSUM_FAILED_ERROR],
+            ['0-4X19-92619812', Isbn::INVALID_CHARACTERS_ERROR],
+            ['978_2723442282', Isbn::INVALID_CHARACTERS_ERROR],
+            ['978#2723442282', Isbn::INVALID_CHARACTERS_ERROR],
+            ['978-272C442282', Isbn::INVALID_CHARACTERS_ERROR],
             // chr(1) evaluates to 0
             // 978-2070546817 is valid
-            array('978-2'.\chr(1).'70546817', Isbn::INVALID_CHARACTERS_ERROR),
-        );
+            ['978-2'.\chr(1).'70546817', Isbn::INVALID_CHARACTERS_ERROR],
+        ];
     }
 
     public function getValidIsbn()
@@ -151,9 +151,9 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidIsbn10($isbn)
     {
-        $constraint = new Isbn(array(
+        $constraint = new Isbn([
             'type' => 'isbn10',
-        ));
+        ]);
 
         $this->validator->validate($isbn, $constraint);
 
@@ -165,10 +165,10 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIsbn10($isbn, $code)
     {
-        $constraint = new Isbn(array(
+        $constraint = new Isbn([
             'type' => 'isbn10',
             'isbn10Message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($isbn, $constraint);
 
@@ -183,7 +183,7 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidIsbn13($isbn)
     {
-        $constraint = new Isbn(array('type' => 'isbn13'));
+        $constraint = new Isbn(['type' => 'isbn13']);
 
         $this->validator->validate($isbn, $constraint);
 
@@ -195,10 +195,10 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIsbn13($isbn, $code)
     {
-        $constraint = new Isbn(array(
+        $constraint = new Isbn([
             'type' => 'isbn13',
             'isbn13Message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($isbn, $constraint);
 
@@ -225,9 +225,9 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIsbnAnyIsbn10($isbn, $code)
     {
-        $constraint = new Isbn(array(
+        $constraint = new Isbn([
             'bothIsbnMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($isbn, $constraint);
 
@@ -247,9 +247,9 @@ class IsbnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIsbnAnyIsbn13($isbn, $code)
     {
-        $constraint = new Isbn(array(
+        $constraint = new Isbn([
             'bothIsbnMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($isbn, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IssnValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IssnValidatorTest.php
index 9f485d241c..ac82d69ba6 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IssnValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IssnValidatorTest.php
@@ -27,42 +27,42 @@ class IssnValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidLowerCasedIssn()
     {
-        return array(
-            array('2162-321x'),
-            array('2160-200x'),
-            array('1537-453x'),
-            array('1937-710x'),
-            array('0002-922x'),
-            array('1553-345x'),
-            array('1553-619x'),
-        );
+        return [
+            ['2162-321x'],
+            ['2160-200x'],
+            ['1537-453x'],
+            ['1937-710x'],
+            ['0002-922x'],
+            ['1553-345x'],
+            ['1553-619x'],
+        ];
     }
 
     public function getValidNonHyphenatedIssn()
     {
-        return array(
-            array('2162321X'),
-            array('01896016'),
-            array('15744647'),
-            array('14350645'),
-            array('07174055'),
-            array('20905076'),
-            array('14401592'),
-        );
+        return [
+            ['2162321X'],
+            ['01896016'],
+            ['15744647'],
+            ['14350645'],
+            ['07174055'],
+            ['20905076'],
+            ['14401592'],
+        ];
     }
 
     public function getFullValidIssn()
     {
-        return array(
-            array('1550-7416'),
-            array('1539-8560'),
-            array('2156-5376'),
-            array('1119-023X'),
-            array('1684-5315'),
-            array('1996-0786'),
-            array('1684-5374'),
-            array('1996-0794'),
-        );
+        return [
+            ['1550-7416'],
+            ['1539-8560'],
+            ['2156-5376'],
+            ['1119-023X'],
+            ['1684-5315'],
+            ['1996-0786'],
+            ['1684-5374'],
+            ['1996-0794'],
+        ];
     }
 
     public function getValidIssn()
@@ -76,16 +76,16 @@ class IssnValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidIssn()
     {
-        return array(
-            array(0, Issn::TOO_SHORT_ERROR),
-            array('1539', Issn::TOO_SHORT_ERROR),
-            array('2156-537A', Issn::INVALID_CHARACTERS_ERROR),
-            array('1119-0231', Issn::CHECKSUM_FAILED_ERROR),
-            array('1684-5312', Issn::CHECKSUM_FAILED_ERROR),
-            array('1996-0783', Issn::CHECKSUM_FAILED_ERROR),
-            array('1684-537X', Issn::CHECKSUM_FAILED_ERROR),
-            array('1996-0795', Issn::CHECKSUM_FAILED_ERROR),
-        );
+        return [
+            [0, Issn::TOO_SHORT_ERROR],
+            ['1539', Issn::TOO_SHORT_ERROR],
+            ['2156-537A', Issn::INVALID_CHARACTERS_ERROR],
+            ['1119-0231', Issn::CHECKSUM_FAILED_ERROR],
+            ['1684-5312', Issn::CHECKSUM_FAILED_ERROR],
+            ['1996-0783', Issn::CHECKSUM_FAILED_ERROR],
+            ['1684-537X', Issn::CHECKSUM_FAILED_ERROR],
+            ['1996-0795', Issn::CHECKSUM_FAILED_ERROR],
+        ];
     }
 
     public function testNullIsValid()
@@ -120,10 +120,10 @@ class IssnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCaseSensitiveIssns($issn)
     {
-        $constraint = new Issn(array(
+        $constraint = new Issn([
             'caseSensitive' => true,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($issn, $constraint);
 
@@ -138,10 +138,10 @@ class IssnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testRequireHyphenIssns($issn)
     {
-        $constraint = new Issn(array(
+        $constraint = new Issn([
             'requireHyphen' => true,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($issn, $constraint);
 
@@ -168,9 +168,9 @@ class IssnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidIssn($issn, $code)
     {
-        $constraint = new Issn(array(
+        $constraint = new Issn([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($issn, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LanguageValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LanguageValidatorTest.php
index 4f9e8e52a5..7d61dd4702 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LanguageValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LanguageValidatorTest.php
@@ -57,11 +57,11 @@ class LanguageValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidLanguages()
     {
-        return array(
-            array('en'),
-            array('en_US'),
-            array('my'),
-        );
+        return [
+            ['en'],
+            ['en_US'],
+            ['my'],
+        ];
     }
 
     /**
@@ -69,9 +69,9 @@ class LanguageValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidLanguages($language)
     {
-        $constraint = new Language(array(
+        $constraint = new Language([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($language, $constraint);
 
@@ -83,10 +83,10 @@ class LanguageValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidLanguages()
     {
-        return array(
-            array('EN'),
-            array('foobar'),
-        );
+        return [
+            ['EN'],
+            ['foobar'],
+        ];
     }
 
     public function testValidateUsingCountrySpecificLocale()
@@ -96,9 +96,9 @@ class LanguageValidatorTest extends ConstraintValidatorTestCase
         \Locale::setDefault('fr_FR');
         $existingLanguage = 'en';
 
-        $this->validator->validate($existingLanguage, new Language(array(
+        $this->validator->validate($existingLanguage, new Language([
             'message' => 'aMessage',
-        )));
+        ]));
 
         $this->assertNoViolation();
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LengthValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LengthValidatorTest.php
index 1d537e2db3..d12874896c 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LengthValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LengthValidatorTest.php
@@ -46,50 +46,50 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
 
     public function getThreeOrLessCharacters()
     {
-        return array(
-            array(12),
-            array('12'),
-            array('üü'),
-            array('éé'),
-            array(123),
-            array('123'),
-            array('üüü'),
-            array('ééé'),
-        );
+        return [
+            [12],
+            ['12'],
+            ['üü'],
+            ['éé'],
+            [123],
+            ['123'],
+            ['üüü'],
+            ['ééé'],
+        ];
     }
 
     public function getFourCharacters()
     {
-        return array(
-            array(1234),
-            array('1234'),
-            array('üüüü'),
-            array('éééé'),
-        );
+        return [
+            [1234],
+            ['1234'],
+            ['üüüü'],
+            ['éééé'],
+        ];
     }
 
     public function getFiveOrMoreCharacters()
     {
-        return array(
-            array(12345),
-            array('12345'),
-            array('üüüüü'),
-            array('ééééé'),
-            array(123456),
-            array('123456'),
-            array('üüüüüü'),
-            array('éééééé'),
-        );
+        return [
+            [12345],
+            ['12345'],
+            ['üüüüü'],
+            ['ééééé'],
+            [123456],
+            ['123456'],
+            ['üüüüüü'],
+            ['éééééé'],
+        ];
     }
 
     public function getOneCharset()
     {
-        return array(
-            array('é', 'utf8', true),
-            array("\xE9", 'CP1252', true),
-            array("\xE9", 'XXX', false),
-            array("\xE9", 'utf8', false),
-        );
+        return [
+            ['é', 'utf8', true],
+            ["\xE9", 'CP1252', true],
+            ["\xE9", 'XXX', false],
+            ["\xE9", 'utf8', false],
+        ];
     }
 
     /**
@@ -97,7 +97,7 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMin($value)
     {
-        $constraint = new Length(array('min' => 5));
+        $constraint = new Length(['min' => 5]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -108,7 +108,7 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMax($value)
     {
-        $constraint = new Length(array('max' => 3));
+        $constraint = new Length(['max' => 3]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -130,10 +130,10 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesMin($value)
     {
-        $constraint = new Length(array(
+        $constraint = new Length([
             'min' => 4,
             'minMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -151,10 +151,10 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesMax($value)
     {
-        $constraint = new Length(array(
+        $constraint = new Length([
             'max' => 4,
             'maxMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -172,11 +172,11 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesExactLessThanFour($value)
     {
-        $constraint = new Length(array(
+        $constraint = new Length([
             'min' => 4,
             'max' => 4,
             'exactMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -194,11 +194,11 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesExactMoreThanFour($value)
     {
-        $constraint = new Length(array(
+        $constraint = new Length([
             'min' => 4,
             'max' => 4,
             'exactMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -216,12 +216,12 @@ class LengthValidatorTest extends ConstraintValidatorTestCase
      */
     public function testOneCharset($value, $charset, $isValid)
     {
-        $constraint = new Length(array(
+        $constraint = new Length([
             'min' => 1,
             'max' => 1,
             'charset' => $charset,
             'charsetMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LessThanOrEqualValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LessThanOrEqualValidatorTest.php
index f31a50e673..b77deff616 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LessThanOrEqualValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LessThanOrEqualValidatorTest.php
@@ -39,21 +39,21 @@ class LessThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(1, 2),
-            array(1, 1),
-            array(new \DateTime('2000-01-01'), new \DateTime('2000-01-01')),
-            array(new \DateTime('2000-01-01'), new \DateTime('2020-01-01')),
-            array(new \DateTime('2000-01-01'), '2000-01-01'),
-            array(new \DateTime('2000-01-01'), '2020-01-01'),
-            array(new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'),
-            array(new \DateTime('2000-01-01 UTC'), '2020-01-01 UTC'),
-            array(new ComparisonTest_Class(4), new ComparisonTest_Class(5)),
-            array(new ComparisonTest_Class(5), new ComparisonTest_Class(5)),
-            array('a', 'a'),
-            array('a', 'z'),
-            array(null, 1),
-        );
+        return [
+            [1, 2],
+            [1, 1],
+            [new \DateTime('2000-01-01'), new \DateTime('2000-01-01')],
+            [new \DateTime('2000-01-01'), new \DateTime('2020-01-01')],
+            [new \DateTime('2000-01-01'), '2000-01-01'],
+            [new \DateTime('2000-01-01'), '2020-01-01'],
+            [new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'],
+            [new \DateTime('2000-01-01 UTC'), '2020-01-01 UTC'],
+            [new ComparisonTest_Class(4), new ComparisonTest_Class(5)],
+            [new ComparisonTest_Class(5), new ComparisonTest_Class(5)],
+            ['a', 'a'],
+            ['a', 'z'],
+            [null, 1],
+        ];
     }
 
     /**
@@ -61,10 +61,10 @@ class LessThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(4),
-            array(5),
-        );
+        return [
+            [4],
+            [5],
+        ];
     }
 
     /**
@@ -72,13 +72,13 @@ class LessThanOrEqualValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(2, '2', 1, '1', 'integer'),
-            array(new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2010-01-01 UTC'), 'Jan 1, 2010, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(5), '5', new ComparisonTest_Class(4), '4', __NAMESPACE__.'\ComparisonTest_Class'),
-            array('c', '"c"', 'b', '"b"', 'string'),
-        );
+        return [
+            [2, '2', 1, '1', 'integer'],
+            [new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2010-01-01 UTC'), 'Jan 1, 2010, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(5), '5', new ComparisonTest_Class(4), '4', __NAMESPACE__.'\ComparisonTest_Class'],
+            ['c', '"c"', 'b', '"b"', 'string'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php
index a5d69355d7..7d209ed5d4 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LessThanValidatorTest.php
@@ -39,15 +39,15 @@ class LessThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(1, 2),
-            array(new \DateTime('2000-01-01'), new \DateTime('2010-01-01')),
-            array(new \DateTime('2000-01-01'), '2010-01-01'),
-            array(new \DateTime('2000-01-01 UTC'), '2010-01-01 UTC'),
-            array(new ComparisonTest_Class(4), new ComparisonTest_Class(5)),
-            array('22', '333'),
-            array(null, 1),
-        );
+        return [
+            [1, 2],
+            [new \DateTime('2000-01-01'), new \DateTime('2010-01-01')],
+            [new \DateTime('2000-01-01'), '2010-01-01'],
+            [new \DateTime('2000-01-01 UTC'), '2010-01-01 UTC'],
+            [new ComparisonTest_Class(4), new ComparisonTest_Class(5)],
+            ['22', '333'],
+            [null, 1],
+        ];
     }
 
     /**
@@ -55,9 +55,9 @@ class LessThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(4),
-        );
+        return [
+            [4],
+        ];
     }
 
     /**
@@ -65,18 +65,18 @@ class LessThanValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(3, '3', 2, '2', 'integer'),
-            array(2, '2', 2, '2', 'integer'),
-            array(new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2010-01-01 UTC'), 'Jan 1, 2010, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000-01-01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-            array(new ComparisonTest_Class(6), '6', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-            array('333', '"333"', '22', '"22"', 'string'),
-        );
+        return [
+            [3, '3', 2, '2', 'integer'],
+            [2, '2', 2, '2', 'integer'],
+            [new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2010-01-01'), 'Jan 1, 2010, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2010-01-01 UTC'), 'Jan 1, 2010, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000-01-01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+            [new ComparisonTest_Class(6), '6', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+            ['333', '"333"', '22', '"22"', 'string'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LocaleValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LocaleValidatorTest.php
index 060d17a643..381d690bb8 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LocaleValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LocaleValidatorTest.php
@@ -37,7 +37,7 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function testNullIsValid()
     {
-        $this->validator->validate(null, new Locale(array('canonicalize' => true)));
+        $this->validator->validate(null, new Locale(['canonicalize' => true]));
 
         $this->assertNoViolation();
     }
@@ -57,7 +57,7 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function testEmptyStringIsValid()
     {
-        $this->validator->validate('', new Locale(array('canonicalize' => true)));
+        $this->validator->validate('', new Locale(['canonicalize' => true]));
 
         $this->assertNoViolation();
     }
@@ -77,7 +77,7 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
      */
     public function testExpectsStringCompatibleType()
     {
-        $this->validator->validate(new \stdClass(), new Locale(array('canonicalize' => true)));
+        $this->validator->validate(new \stdClass(), new Locale(['canonicalize' => true]));
     }
 
     /**
@@ -105,14 +105,14 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidLocales()
     {
-        return array(
-            array('en', array('canonicalize' => true)),
-            array('en_US', array('canonicalize' => true)),
-            array('pt', array('canonicalize' => true)),
-            array('pt_PT', array('canonicalize' => true)),
-            array('zh_Hans', array('canonicalize' => true)),
-            array('fil_PH', array('canonicalize' => true)),
-        );
+        return [
+            ['en', ['canonicalize' => true]],
+            ['en_US', ['canonicalize' => true]],
+            ['pt', ['canonicalize' => true]],
+            ['pt_PT', ['canonicalize' => true]],
+            ['zh_Hans', ['canonicalize' => true]],
+            ['fil_PH', ['canonicalize' => true]],
+        ];
     }
 
     /**
@@ -122,9 +122,9 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
      */
     public function testLegacyInvalidLocales(string $locale)
     {
-        $constraint = new Locale(array(
+        $constraint = new Locale([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($locale, $constraint);
 
@@ -136,10 +136,10 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function getLegacyInvalidLocales()
     {
-        return array(
-            array('EN'),
-            array('foobar'),
-        );
+        return [
+            ['EN'],
+            ['foobar'],
+        ];
     }
 
     /**
@@ -147,10 +147,10 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidLocales($locale)
     {
-        $constraint = new Locale(array(
+        $constraint = new Locale([
             'message' => 'myMessage',
             'canonicalize' => true,
-        ));
+        ]);
 
         $this->validator->validate($locale, $constraint);
 
@@ -162,10 +162,10 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidLocales()
     {
-        return array(
-            array('baz'),
-            array('foobar'),
-        );
+        return [
+            ['baz'],
+            ['foobar'],
+        ];
     }
 
     /**
@@ -175,9 +175,9 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidLocalesWithoutCanonicalization(string $locale)
     {
-        $constraint = new Locale(array(
+        $constraint = new Locale([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($locale, $constraint);
 
@@ -192,10 +192,10 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidLocalesWithCanonicalization(string $locale)
     {
-        $constraint = new Locale(array(
+        $constraint = new Locale([
             'message' => 'myMessage',
             'canonicalize' => true,
-        ));
+        ]);
 
         $this->validator->validate($locale, $constraint);
 
@@ -204,10 +204,10 @@ class LocaleValidatorTest extends ConstraintValidatorTestCase
 
     public function getUncanonicalizedLocales(): iterable
     {
-        return array(
-            array('en-US'),
-            array('es-AR'),
-            array('fr_FR.utf8'),
-        );
+        return [
+            ['en-US'],
+            ['es-AR'],
+            ['fr_FR.utf8'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/LuhnValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/LuhnValidatorTest.php
index 8427b66825..bc69dd78da 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/LuhnValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/LuhnValidatorTest.php
@@ -48,26 +48,26 @@ class LuhnValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidNumbers()
     {
-        return array(
-            array('42424242424242424242'),
-            array('378282246310005'),
-            array('371449635398431'),
-            array('378734493671000'),
-            array('5610591081018250'),
-            array('30569309025904'),
-            array('38520000023237'),
-            array('6011111111111117'),
-            array('6011000990139424'),
-            array('3530111333300000'),
-            array('3566002020360505'),
-            array('5555555555554444'),
-            array('5105105105105100'),
-            array('4111111111111111'),
-            array('4012888888881881'),
-            array('4222222222222'),
-            array('5019717010103742'),
-            array('6331101999990016'),
-        );
+        return [
+            ['42424242424242424242'],
+            ['378282246310005'],
+            ['371449635398431'],
+            ['378734493671000'],
+            ['5610591081018250'],
+            ['30569309025904'],
+            ['38520000023237'],
+            ['6011111111111117'],
+            ['6011000990139424'],
+            ['3530111333300000'],
+            ['3566002020360505'],
+            ['5555555555554444'],
+            ['5105105105105100'],
+            ['4111111111111111'],
+            ['4012888888881881'],
+            ['4222222222222'],
+            ['5019717010103742'],
+            ['6331101999990016'],
+        ];
     }
 
     /**
@@ -75,9 +75,9 @@ class LuhnValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidNumbers($number, $code)
     {
-        $constraint = new Luhn(array(
+        $constraint = new Luhn([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($number, $constraint);
 
@@ -89,13 +89,13 @@ class LuhnValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidNumbers()
     {
-        return array(
-            array('1234567812345678', Luhn::CHECKSUM_FAILED_ERROR),
-            array('4222222222222222', Luhn::CHECKSUM_FAILED_ERROR),
-            array('0000000000000000', Luhn::CHECKSUM_FAILED_ERROR),
-            array('000000!000000000', Luhn::INVALID_CHARACTERS_ERROR),
-            array('42-22222222222222', Luhn::INVALID_CHARACTERS_ERROR),
-        );
+        return [
+            ['1234567812345678', Luhn::CHECKSUM_FAILED_ERROR],
+            ['4222222222222222', Luhn::CHECKSUM_FAILED_ERROR],
+            ['0000000000000000', Luhn::CHECKSUM_FAILED_ERROR],
+            ['000000!000000000', Luhn::INVALID_CHARACTERS_ERROR],
+            ['42-22222222222222', Luhn::INVALID_CHARACTERS_ERROR],
+        ];
     }
 
     /**
@@ -111,12 +111,12 @@ class LuhnValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidTypes()
     {
-        return array(
-            array(0),
-            array(123),
-            array(42424242424242424242),
-            array(378282246310005),
-            array(371449635398431),
-        );
+        return [
+            [0],
+            [123],
+            [42424242424242424242],
+            [378282246310005],
+            [371449635398431],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/NotBlankValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/NotBlankValidatorTest.php
index fd92febf9b..f634e0c11c 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/NotBlankValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/NotBlankValidatorTest.php
@@ -34,20 +34,20 @@ class NotBlankValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidValues()
     {
-        return array(
-            array('foobar'),
-            array(0),
-            array(0.0),
-            array('0'),
-            array(1234),
-        );
+        return [
+            ['foobar'],
+            [0],
+            [0.0],
+            ['0'],
+            [1234],
+        ];
     }
 
     public function testNullIsInvalid()
     {
-        $constraint = new NotBlank(array(
+        $constraint = new NotBlank([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(null, $constraint);
 
@@ -59,9 +59,9 @@ class NotBlankValidatorTest extends ConstraintValidatorTestCase
 
     public function testBlankIsInvalid()
     {
-        $constraint = new NotBlank(array(
+        $constraint = new NotBlank([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('', $constraint);
 
@@ -73,9 +73,9 @@ class NotBlankValidatorTest extends ConstraintValidatorTestCase
 
     public function testFalseIsInvalid()
     {
-        $constraint = new NotBlank(array(
+        $constraint = new NotBlank([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(false, $constraint);
 
@@ -87,11 +87,11 @@ class NotBlankValidatorTest extends ConstraintValidatorTestCase
 
     public function testEmptyArrayIsInvalid()
     {
-        $constraint = new NotBlank(array(
+        $constraint = new NotBlank([
             'message' => 'myMessage',
-        ));
+        ]);
 
-        $this->validator->validate(array(), $constraint);
+        $this->validator->validate([], $constraint);
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ value }}', 'array')
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/NotEqualToValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/NotEqualToValidatorTest.php
index e7031d4c4d..810f7a175f 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/NotEqualToValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/NotEqualToValidatorTest.php
@@ -39,15 +39,15 @@ class NotEqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(1, 2),
-            array('22', '333'),
-            array(new \DateTime('2001-01-01'), new \DateTime('2000-01-01')),
-            array(new \DateTime('2001-01-01'), '2000-01-01'),
-            array(new \DateTime('2001-01-01 UTC'), '2000-01-01 UTC'),
-            array(new ComparisonTest_Class(6), new ComparisonTest_Class(5)),
-            array(null, 1),
-        );
+        return [
+            [1, 2],
+            ['22', '333'],
+            [new \DateTime('2001-01-01'), new \DateTime('2000-01-01')],
+            [new \DateTime('2001-01-01'), '2000-01-01'],
+            [new \DateTime('2001-01-01 UTC'), '2000-01-01 UTC'],
+            [new ComparisonTest_Class(6), new ComparisonTest_Class(5)],
+            [null, 1],
+        ];
     }
 
     /**
@@ -55,9 +55,9 @@ class NotEqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(0),
-        );
+        return [
+            [0],
+        ];
     }
 
     /**
@@ -65,14 +65,14 @@ class NotEqualToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideInvalidComparisons()
     {
-        return array(
-            array(3, '3', 3, '3', 'integer'),
-            array('2', '"2"', 2, '2', 'integer'),
-            array('a', '"a"', 'a', '"a"', 'string'),
-            array(new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new \DateTime('2000-01-01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array(new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'),
-        );
+        return [
+            [3, '3', 3, '3', 'integer'],
+            ['2', '"2"', 2, '2', 'integer'],
+            ['a', '"a"', 'a', '"a"', 'string'],
+            [new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000-01-01'), 'Jan 1, 2000, 12:00 AM', '2000-01-01', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new \DateTime('2000-01-01 UTC'), 'Jan 1, 2000, 12:00 AM', '2000-01-01 UTC', 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [new ComparisonTest_Class(5), '5', new ComparisonTest_Class(5), '5', __NAMESPACE__.'\ComparisonTest_Class'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/NotIdenticalToValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/NotIdenticalToValidatorTest.php
index 907f36c063..0cb9ec5431 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/NotIdenticalToValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/NotIdenticalToValidatorTest.php
@@ -39,18 +39,18 @@ class NotIdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisons()
     {
-        return array(
-            array(1, 2),
-            array('2', 2),
-            array('22', '333'),
-            array(new \DateTime('2001-01-01'), new \DateTime('2000-01-01')),
-            array(new \DateTime('2000-01-01'), new \DateTime('2000-01-01')),
-            array(new \DateTime('2001-01-01'), '2000-01-01'),
-            array(new \DateTime('2000-01-01'), '2000-01-01'),
-            array(new \DateTime('2001-01-01'), '2000-01-01'),
-            array(new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'),
-            array(null, 1),
-        );
+        return [
+            [1, 2],
+            ['2', 2],
+            ['22', '333'],
+            [new \DateTime('2001-01-01'), new \DateTime('2000-01-01')],
+            [new \DateTime('2000-01-01'), new \DateTime('2000-01-01')],
+            [new \DateTime('2001-01-01'), '2000-01-01'],
+            [new \DateTime('2000-01-01'), '2000-01-01'],
+            [new \DateTime('2001-01-01'), '2000-01-01'],
+            [new \DateTime('2000-01-01 UTC'), '2000-01-01 UTC'],
+            [null, 1],
+        ];
     }
 
     /**
@@ -58,9 +58,9 @@ class NotIdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
      */
     public function provideValidComparisonsToPropertyPath()
     {
-        return array(
-            array(0),
-        );
+        return [
+            [0],
+        ];
     }
 
     public function provideAllInvalidComparisons()
@@ -84,12 +84,12 @@ class NotIdenticalToValidatorTest extends AbstractComparisonValidatorTestCase
         $date = new \DateTime('2000-01-01');
         $object = new ComparisonTest_Class(2);
 
-        $comparisons = array(
-            array(3, '3', 3, '3', 'integer'),
-            array('a', '"a"', 'a', '"a"', 'string'),
-            array($date, 'Jan 1, 2000, 12:00 AM', $date, 'Jan 1, 2000, 12:00 AM', 'DateTime'),
-            array($object, '2', $object, '2', __NAMESPACE__.'\ComparisonTest_Class'),
-        );
+        $comparisons = [
+            [3, '3', 3, '3', 'integer'],
+            ['a', '"a"', 'a', '"a"', 'string'],
+            [$date, 'Jan 1, 2000, 12:00 AM', $date, 'Jan 1, 2000, 12:00 AM', 'DateTime'],
+            [$object, '2', $object, '2', __NAMESPACE__.'\ComparisonTest_Class'],
+        ];
 
         return $comparisons;
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/NotNullValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/NotNullValidatorTest.php
index feb3c2f8e7..a726d063b9 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/NotNullValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/NotNullValidatorTest.php
@@ -34,19 +34,19 @@ class NotNullValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidValues()
     {
-        return array(
-            array(0),
-            array(false),
-            array(true),
-            array(''),
-        );
+        return [
+            [0],
+            [false],
+            [true],
+            [''],
+        ];
     }
 
     public function testNullIsInvalid()
     {
-        $constraint = new NotNull(array(
+        $constraint = new NotNull([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate(null, $constraint);
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/RangeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/RangeValidatorTest.php
index 7eb931ee92..661161d886 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/RangeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/RangeValidatorTest.php
@@ -25,43 +25,43 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
 
     public function testNullIsValid()
     {
-        $this->validator->validate(null, new Range(array('min' => 10, 'max' => 20)));
+        $this->validator->validate(null, new Range(['min' => 10, 'max' => 20]));
 
         $this->assertNoViolation();
     }
 
     public function getTenToTwenty()
     {
-        return array(
-            array(10.00001),
-            array(19.99999),
-            array('10.00001'),
-            array('19.99999'),
-            array(10),
-            array(20),
-            array(10.0),
-            array(20.0),
-        );
+        return [
+            [10.00001],
+            [19.99999],
+            ['10.00001'],
+            ['19.99999'],
+            [10],
+            [20],
+            [10.0],
+            [20.0],
+        ];
     }
 
     public function getLessThanTen()
     {
-        return array(
-            array(9.99999, '9.99999'),
-            array('9.99999', '"9.99999"'),
-            array(5, '5'),
-            array(1.0, '1.0'),
-        );
+        return [
+            [9.99999, '9.99999'],
+            ['9.99999', '"9.99999"'],
+            [5, '5'],
+            [1.0, '1.0'],
+        ];
     }
 
     public function getMoreThanTwenty()
     {
-        return array(
-            array(20.000001, '20.000001'),
-            array('20.000001', '"20.000001"'),
-            array(21, '21'),
-            array(30.0, '30.0'),
-        );
+        return [
+            [20.000001, '20.000001'],
+            ['20.000001', '"20.000001"'],
+            [21, '21'],
+            [30.0, '30.0'],
+        ];
     }
 
     /**
@@ -69,7 +69,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMin($value)
     {
-        $constraint = new Range(array('min' => 10));
+        $constraint = new Range(['min' => 10]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -80,7 +80,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMax($value)
     {
-        $constraint = new Range(array('max' => 20));
+        $constraint = new Range(['max' => 20]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -91,7 +91,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValuesMinMax($value)
     {
-        $constraint = new Range(array('min' => 10, 'max' => 20));
+        $constraint = new Range(['min' => 10, 'max' => 20]);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -102,10 +102,10 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesMin($value, $formattedValue)
     {
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 10,
             'minMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -121,10 +121,10 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesMax($value, $formattedValue)
     {
-        $constraint = new Range(array(
+        $constraint = new Range([
             'max' => 20,
             'maxMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -140,12 +140,12 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesCombinedMax($value, $formattedValue)
     {
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 10,
             'max' => 20,
             'minMessage' => 'myMinMessage',
             'maxMessage' => 'myMaxMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -161,12 +161,12 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValuesCombinedMin($value, $formattedValue)
     {
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 10,
             'max' => 20,
             'minMessage' => 'myMinMessage',
             'maxMessage' => 'myMaxMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -183,15 +183,15 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // the default timezone
         $this->setDefaultTimezone('UTC');
 
-        $tests = array(
-            array(new \DateTime('March 10, 2014')),
-            array(new \DateTime('March 15, 2014')),
-            array(new \DateTime('March 20, 2014')),
-        );
+        $tests = [
+            [new \DateTime('March 10, 2014')],
+            [new \DateTime('March 15, 2014')],
+            [new \DateTime('March 20, 2014')],
+        ];
 
-        $tests[] = array(new \DateTimeImmutable('March 10, 2014'));
-        $tests[] = array(new \DateTimeImmutable('March 15, 2014'));
-        $tests[] = array(new \DateTimeImmutable('March 20, 2014'));
+        $tests[] = [new \DateTimeImmutable('March 10, 2014')];
+        $tests[] = [new \DateTimeImmutable('March 15, 2014')];
+        $tests[] = [new \DateTimeImmutable('March 20, 2014')];
 
         $this->restoreDefaultTimezone();
 
@@ -204,13 +204,13 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // the default timezone
         $this->setDefaultTimezone('UTC');
 
-        $tests = array(
-            array(new \DateTime('March 20, 2013'), 'Mar 20, 2013, 12:00 AM'),
-            array(new \DateTime('March 9, 2014'), 'Mar 9, 2014, 12:00 AM'),
-        );
+        $tests = [
+            [new \DateTime('March 20, 2013'), 'Mar 20, 2013, 12:00 AM'],
+            [new \DateTime('March 9, 2014'), 'Mar 9, 2014, 12:00 AM'],
+        ];
 
-        $tests[] = array(new \DateTimeImmutable('March 20, 2013'), 'Mar 20, 2013, 12:00 AM');
-        $tests[] = array(new \DateTimeImmutable('March 9, 2014'), 'Mar 9, 2014, 12:00 AM');
+        $tests[] = [new \DateTimeImmutable('March 20, 2013'), 'Mar 20, 2013, 12:00 AM'];
+        $tests[] = [new \DateTimeImmutable('March 9, 2014'), 'Mar 9, 2014, 12:00 AM'];
 
         $this->restoreDefaultTimezone();
 
@@ -223,13 +223,13 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // the default timezone
         $this->setDefaultTimezone('UTC');
 
-        $tests = array(
-            array(new \DateTime('March 21, 2014'), 'Mar 21, 2014, 12:00 AM'),
-            array(new \DateTime('March 9, 2015'), 'Mar 9, 2015, 12:00 AM'),
-        );
+        $tests = [
+            [new \DateTime('March 21, 2014'), 'Mar 21, 2014, 12:00 AM'],
+            [new \DateTime('March 9, 2015'), 'Mar 9, 2015, 12:00 AM'],
+        ];
 
-        $tests[] = array(new \DateTimeImmutable('March 21, 2014'), 'Mar 21, 2014, 12:00 AM');
-        $tests[] = array(new \DateTimeImmutable('March 9, 2015'), 'Mar 9, 2015, 12:00 AM');
+        $tests[] = [new \DateTimeImmutable('March 21, 2014'), 'Mar 21, 2014, 12:00 AM'];
+        $tests[] = [new \DateTimeImmutable('March 9, 2015'), 'Mar 9, 2015, 12:00 AM'];
 
         $this->restoreDefaultTimezone();
 
@@ -241,7 +241,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidDatesMin($value)
     {
-        $constraint = new Range(array('min' => 'March 10, 2014'));
+        $constraint = new Range(['min' => 'March 10, 2014']);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -252,7 +252,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidDatesMax($value)
     {
-        $constraint = new Range(array('max' => 'March 20, 2014'));
+        $constraint = new Range(['max' => 'March 20, 2014']);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -263,7 +263,7 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidDatesMinMax($value)
     {
-        $constraint = new Range(array('min' => 'March 10, 2014', 'max' => 'March 20, 2014'));
+        $constraint = new Range(['min' => 'March 10, 2014', 'max' => 'March 20, 2014']);
         $this->validator->validate($value, $constraint);
 
         $this->assertNoViolation();
@@ -278,10 +278,10 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // Make sure we have the correct version loaded
         IntlTestHelper::requireIntl($this, '57.1');
 
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 'March 10, 2014',
             'minMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -301,10 +301,10 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // Make sure we have the correct version loaded
         IntlTestHelper::requireIntl($this, '57.1');
 
-        $constraint = new Range(array(
+        $constraint = new Range([
             'max' => 'March 20, 2014',
             'maxMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -324,12 +324,12 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // Make sure we have the correct version loaded
         IntlTestHelper::requireIntl($this, '57.1');
 
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 'March 10, 2014',
             'max' => 'March 20, 2014',
             'minMessage' => 'myMinMessage',
             'maxMessage' => 'myMaxMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -349,12 +349,12 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
         // Make sure we have the correct version loaded
         IntlTestHelper::requireIntl($this, '57.1');
 
-        $constraint = new Range(array(
+        $constraint = new Range([
             'min' => 'March 10, 2014',
             'max' => 'March 20, 2014',
             'minMessage' => 'myMinMessage',
             'maxMessage' => 'myMaxMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -367,22 +367,22 @@ class RangeValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidValues()
     {
-        return array(
-            array(9.999999),
-            array(20.000001),
-            array('9.999999'),
-            array('20.000001'),
-            array(new \stdClass()),
-        );
+        return [
+            [9.999999],
+            [20.000001],
+            ['9.999999'],
+            ['20.000001'],
+            [new \stdClass()],
+        ];
     }
 
     public function testNonNumeric()
     {
-        $this->validator->validate('abcd', new Range(array(
+        $this->validator->validate('abcd', new Range([
             'min' => 10,
             'max' => 20,
             'invalidMessage' => 'myMessage',
-        )));
+        ]));
 
         $this->buildViolation('myMessage')
             ->setParameter('{{ value }}', '"abcd"')
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php b/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
index 26ef1b2736..8dc1e4af7d 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/RegexTest.php
@@ -28,37 +28,37 @@ class RegexTest extends TestCase
 
     public function provideHtmlPatterns()
     {
-        return array(
+        return [
             // HTML5 wraps the pattern in ^(?:pattern)$
-            array('/^[0-9]+$/', '[0-9]+'),
-            array('/[0-9]+$/', '.*[0-9]+'),
-            array('/^[0-9]+/', '[0-9]+.*'),
-            array('/[0-9]+/', '.*[0-9]+.*'),
+            ['/^[0-9]+$/', '[0-9]+'],
+            ['/[0-9]+$/', '.*[0-9]+'],
+            ['/^[0-9]+/', '[0-9]+.*'],
+            ['/[0-9]+/', '.*[0-9]+.*'],
             // We need a smart way to allow matching of patterns that contain
             // ^ and $ at various sub-clauses of an or-clause
             // .*(pattern).* seems to work correctly
-            array('/[0-9]$|[a-z]+/', '.*([0-9]$|[a-z]+).*'),
-            array('/[0-9]$|^[a-z]+/', '.*([0-9]$|^[a-z]+).*'),
-            array('/^[0-9]|[a-z]+$/', '.*(^[0-9]|[a-z]+$).*'),
+            ['/[0-9]$|[a-z]+/', '.*([0-9]$|[a-z]+).*'],
+            ['/[0-9]$|^[a-z]+/', '.*([0-9]$|^[a-z]+).*'],
+            ['/^[0-9]|[a-z]+$/', '.*(^[0-9]|[a-z]+$).*'],
             // Unescape escaped delimiters
-            array('/^[0-9]+\/$/', '[0-9]+/'),
-            array('#^[0-9]+\#$#', '[0-9]+#'),
+            ['/^[0-9]+\/$/', '[0-9]+/'],
+            ['#^[0-9]+\#$#', '[0-9]+#'],
             // Cannot be converted
-            array('/^[0-9]+$/i', null),
+            ['/^[0-9]+$/i', null],
 
             // Inverse matches are simple, just wrap in
             // ((?!pattern).)*
-            array('/^[0-9]+$/', '((?!^[0-9]+$).)*', false),
-            array('/[0-9]+$/', '((?![0-9]+$).)*', false),
-            array('/^[0-9]+/', '((?!^[0-9]+).)*', false),
-            array('/[0-9]+/', '((?![0-9]+).)*', false),
-            array('/[0-9]$|[a-z]+/', '((?![0-9]$|[a-z]+).)*', false),
-            array('/[0-9]$|^[a-z]+/', '((?![0-9]$|^[a-z]+).)*', false),
-            array('/^[0-9]|[a-z]+$/', '((?!^[0-9]|[a-z]+$).)*', false),
-            array('/^[0-9]+\/$/', '((?!^[0-9]+/$).)*', false),
-            array('#^[0-9]+\#$#', '((?!^[0-9]+#$).)*', false),
-            array('/^[0-9]+$/i', null, false),
-        );
+            ['/^[0-9]+$/', '((?!^[0-9]+$).)*', false],
+            ['/[0-9]+$/', '((?![0-9]+$).)*', false],
+            ['/^[0-9]+/', '((?!^[0-9]+).)*', false],
+            ['/[0-9]+/', '((?![0-9]+).)*', false],
+            ['/[0-9]$|[a-z]+/', '((?![0-9]$|[a-z]+).)*', false],
+            ['/[0-9]$|^[a-z]+/', '((?![0-9]$|^[a-z]+).)*', false],
+            ['/^[0-9]|[a-z]+$/', '((?!^[0-9]|[a-z]+$).)*', false],
+            ['/^[0-9]+\/$/', '((?!^[0-9]+/$).)*', false],
+            ['#^[0-9]+\#$#', '((?!^[0-9]+#$).)*', false],
+            ['/^[0-9]+$/i', null, false],
+        ];
     }
 
     /**
@@ -66,10 +66,10 @@ class RegexTest extends TestCase
      */
     public function testGetHtmlPattern($pattern, $htmlPattern, $match = true)
     {
-        $constraint = new Regex(array(
+        $constraint = new Regex([
             'pattern' => $pattern,
             'match' => $match,
-        ));
+        ]);
 
         $this->assertSame($pattern, $constraint->pattern);
         $this->assertSame($htmlPattern, $constraint->getHtmlPattern());
@@ -77,10 +77,10 @@ class RegexTest extends TestCase
 
     public function testGetCustomHtmlPattern()
     {
-        $constraint = new Regex(array(
+        $constraint = new Regex([
             'pattern' => '((?![0-9]$|[a-z]+).)*',
             'htmlPattern' => 'foobar',
-        ));
+        ]);
 
         $this->assertSame('((?![0-9]$|[a-z]+).)*', $constraint->pattern);
         $this->assertSame('foobar', $constraint->getHtmlPattern());
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/TimeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/TimeValidatorTest.php
index b0ccc7795e..e204562845 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/TimeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/TimeValidatorTest.php
@@ -67,11 +67,11 @@ class TimeValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidTimes()
     {
-        return array(
-            array('01:02:03'),
-            array('00:00:00'),
-            array('23:59:59'),
-        );
+        return [
+            ['01:02:03'],
+            ['00:00:00'],
+            ['23:59:59'],
+        ];
     }
 
     /**
@@ -79,9 +79,9 @@ class TimeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidTimes($time, $code)
     {
-        $constraint = new Time(array(
+        $constraint = new Time([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($time, $constraint);
 
@@ -93,15 +93,15 @@ class TimeValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidTimes()
     {
-        return array(
-            array('foobar', Time::INVALID_FORMAT_ERROR),
-            array('foobar 12:34:56', Time::INVALID_FORMAT_ERROR),
-            array('12:34:56 foobar', Time::INVALID_FORMAT_ERROR),
-            array('00:00', Time::INVALID_FORMAT_ERROR),
-            array('24:00:00', Time::INVALID_TIME_ERROR),
-            array('00:60:00', Time::INVALID_TIME_ERROR),
-            array('00:00:60', Time::INVALID_TIME_ERROR),
-        );
+        return [
+            ['foobar', Time::INVALID_FORMAT_ERROR],
+            ['foobar 12:34:56', Time::INVALID_FORMAT_ERROR],
+            ['12:34:56 foobar', Time::INVALID_FORMAT_ERROR],
+            ['00:00', Time::INVALID_FORMAT_ERROR],
+            ['24:00:00', Time::INVALID_TIME_ERROR],
+            ['00:60:00', Time::INVALID_TIME_ERROR],
+            ['00:00:60', Time::INVALID_TIME_ERROR],
+        ];
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/TypeValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/TypeValidatorTest.php
index 86ce972a46..17334bea79 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/TypeValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/TypeValidatorTest.php
@@ -26,7 +26,7 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
 
     public function testNullIsValid()
     {
-        $constraint = new Type(array('type' => 'integer'));
+        $constraint = new Type(['type' => 'integer']);
 
         $this->validator->validate(null, $constraint);
 
@@ -35,7 +35,7 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
 
     public function testEmptyIsValidIfString()
     {
-        $constraint = new Type(array('type' => 'string'));
+        $constraint = new Type(['type' => 'string']);
 
         $this->validator->validate('', $constraint);
 
@@ -44,10 +44,10 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
 
     public function testEmptyIsInvalidIfNoString()
     {
-        $constraint = new Type(array(
+        $constraint = new Type([
             'type' => 'integer',
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('', $constraint);
 
@@ -63,7 +63,7 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidValues($value, $type)
     {
-        $constraint = new Type(array('type' => $type));
+        $constraint = new Type(['type' => $type]);
 
         $this->validator->validate($value, $constraint);
 
@@ -75,36 +75,36 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
         $object = new \stdClass();
         $file = $this->createFile();
 
-        return array(
-            array(true, 'Boolean'),
-            array(false, 'Boolean'),
-            array(true, 'boolean'),
-            array(false, 'boolean'),
-            array(true, 'bool'),
-            array(false, 'bool'),
-            array(0, 'numeric'),
-            array('0', 'numeric'),
-            array(1.5, 'numeric'),
-            array('1.5', 'numeric'),
-            array(0, 'integer'),
-            array(1.5, 'float'),
-            array('12345', 'string'),
-            array(array(), 'array'),
-            array($object, 'object'),
-            array($object, 'stdClass'),
-            array($file, 'resource'),
-            array('12345', 'digit'),
-            array('12a34', 'alnum'),
-            array('abcde', 'alpha'),
-            array("\n\r\t", 'cntrl'),
-            array('arf12', 'graph'),
-            array('abcde', 'lower'),
-            array('ABCDE', 'upper'),
-            array('arf12', 'print'),
-            array('*&$()', 'punct'),
-            array("\n\r\t", 'space'),
-            array('AB10BC99', 'xdigit'),
-        );
+        return [
+            [true, 'Boolean'],
+            [false, 'Boolean'],
+            [true, 'boolean'],
+            [false, 'boolean'],
+            [true, 'bool'],
+            [false, 'bool'],
+            [0, 'numeric'],
+            ['0', 'numeric'],
+            [1.5, 'numeric'],
+            ['1.5', 'numeric'],
+            [0, 'integer'],
+            [1.5, 'float'],
+            ['12345', 'string'],
+            [[], 'array'],
+            [$object, 'object'],
+            [$object, 'stdClass'],
+            [$file, 'resource'],
+            ['12345', 'digit'],
+            ['12a34', 'alnum'],
+            ['abcde', 'alpha'],
+            ["\n\r\t", 'cntrl'],
+            ['arf12', 'graph'],
+            ['abcde', 'lower'],
+            ['ABCDE', 'upper'],
+            ['arf12', 'print'],
+            ['*&$()', 'punct'],
+            ["\n\r\t", 'space'],
+            ['AB10BC99', 'xdigit'],
+        ];
     }
 
     /**
@@ -112,10 +112,10 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidValues($value, $type, $valueAsString)
     {
-        $constraint = new Type(array(
+        $constraint = new Type([
             'type' => $type,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($value, $constraint);
 
@@ -131,36 +131,36 @@ class TypeValidatorTest extends ConstraintValidatorTestCase
         $object = new \stdClass();
         $file = $this->createFile();
 
-        return array(
-            array('foobar', 'numeric', '"foobar"'),
-            array('foobar', 'boolean', '"foobar"'),
-            array('0', 'integer', '"0"'),
-            array('1.5', 'float', '"1.5"'),
-            array(12345, 'string', '12345'),
-            array($object, 'boolean', 'object'),
-            array($object, 'numeric', 'object'),
-            array($object, 'integer', 'object'),
-            array($object, 'float', 'object'),
-            array($object, 'string', 'object'),
-            array($object, 'resource', 'object'),
-            array($file, 'boolean', 'resource'),
-            array($file, 'numeric', 'resource'),
-            array($file, 'integer', 'resource'),
-            array($file, 'float', 'resource'),
-            array($file, 'string', 'resource'),
-            array($file, 'object', 'resource'),
-            array('12a34', 'digit', '"12a34"'),
-            array('1a#23', 'alnum', '"1a#23"'),
-            array('abcd1', 'alpha', '"abcd1"'),
-            array("\nabc", 'cntrl', "\"\nabc\""),
-            array("abc\n", 'graph', "\"abc\n\""),
-            array('abCDE', 'lower', '"abCDE"'),
-            array('ABcde', 'upper', '"ABcde"'),
-            array("\nabc", 'print', "\"\nabc\""),
-            array('abc&$!', 'punct', '"abc&$!"'),
-            array("\nabc", 'space', "\"\nabc\""),
-            array('AR1012', 'xdigit', '"AR1012"'),
-        );
+        return [
+            ['foobar', 'numeric', '"foobar"'],
+            ['foobar', 'boolean', '"foobar"'],
+            ['0', 'integer', '"0"'],
+            ['1.5', 'float', '"1.5"'],
+            [12345, 'string', '12345'],
+            [$object, 'boolean', 'object'],
+            [$object, 'numeric', 'object'],
+            [$object, 'integer', 'object'],
+            [$object, 'float', 'object'],
+            [$object, 'string', 'object'],
+            [$object, 'resource', 'object'],
+            [$file, 'boolean', 'resource'],
+            [$file, 'numeric', 'resource'],
+            [$file, 'integer', 'resource'],
+            [$file, 'float', 'resource'],
+            [$file, 'string', 'resource'],
+            [$file, 'object', 'resource'],
+            ['12a34', 'digit', '"12a34"'],
+            ['1a#23', 'alnum', '"1a#23"'],
+            ['abcd1', 'alpha', '"abcd1"'],
+            ["\nabc", 'cntrl', "\"\nabc\""],
+            ["abc\n", 'graph', "\"abc\n\""],
+            ['abCDE', 'lower', '"abCDE"'],
+            ['ABcde', 'upper', '"ABcde"'],
+            ["\nabc", 'print', "\"\nabc\""],
+            ['abc&$!', 'punct', '"abc&$!"'],
+            ["\nabc", 'space', "\"\nabc\""],
+            ['AR1012', 'xdigit', '"AR1012"'],
+        ];
     }
 
     protected function createFile()
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/UrlValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/UrlValidatorTest.php
index fd9d252f38..47b7233113 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/UrlValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/UrlValidatorTest.php
@@ -71,9 +71,9 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidRelativeUrl($url)
     {
-        $constraint = new Url(array(
+        $constraint = new Url([
             'relativeProtocol' => true,
-        ));
+        ]);
 
         $this->validator->validate($url, $constraint);
 
@@ -82,76 +82,76 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidRelativeUrls()
     {
-        return array(
-            array('//google.com'),
-            array('//symfony.fake/blog/'),
-            array('//symfony.com/search?type=&q=url+validator'),
-        );
+        return [
+            ['//google.com'],
+            ['//symfony.fake/blog/'],
+            ['//symfony.com/search?type=&q=url+validator'],
+        ];
     }
 
     public function getValidUrls()
     {
-        return array(
-            array('http://a.pl'),
-            array('http://www.google.com'),
-            array('http://www.google.com.'),
-            array('http://www.google.museum'),
-            array('https://google.com/'),
-            array('https://google.com:80/'),
-            array('http://www.example.coop/'),
-            array('http://www.test-example.com/'),
-            array('http://www.symfony.com/'),
-            array('http://symfony.fake/blog/'),
-            array('http://symfony.com/?'),
-            array('http://symfony.com/search?type=&q=url+validator'),
-            array('http://symfony.com/#'),
-            array('http://symfony.com/#?'),
-            array('http://www.symfony.com/doc/current/book/validation.html#supported-constraints'),
-            array('http://very.long.domain.name.com/'),
-            array('http://localhost/'),
-            array('http://myhost123/'),
-            array('http://127.0.0.1/'),
-            array('http://127.0.0.1:80/'),
-            array('http://[::1]/'),
-            array('http://[::1]:80/'),
-            array('http://[1:2:3::4:5:6:7]/'),
-            array('http://sãopaulo.com/'),
-            array('http://xn--sopaulo-xwa.com/'),
-            array('http://sãopaulo.com.br/'),
-            array('http://xn--sopaulo-xwa.com.br/'),
-            array('http://пример.испытание/'),
-            array('http://xn--e1afmkfd.xn--80akhbyknj4f/'),
-            array('http://مثال.إختبار/'),
-            array('http://xn--mgbh0fb.xn--kgbechtv/'),
-            array('http://例子.测试/'),
-            array('http://xn--fsqu00a.xn--0zwm56d/'),
-            array('http://例子.測試/'),
-            array('http://xn--fsqu00a.xn--g6w251d/'),
-            array('http://例え.テスト/'),
-            array('http://xn--r8jz45g.xn--zckzah/'),
-            array('http://مثال.آزمایشی/'),
-            array('http://xn--mgbh0fb.xn--hgbk6aj7f53bba/'),
-            array('http://실례.테스트/'),
-            array('http://xn--9n2bp8q.xn--9t4b11yi5a/'),
-            array('http://العربية.idn.icann.org/'),
-            array('http://xn--ogb.idn.icann.org/'),
-            array('http://xn--e1afmkfd.xn--80akhbyknj4f.xn--e1afmkfd/'),
-            array('http://xn--espaa-rta.xn--ca-ol-fsay5a/'),
-            array('http://xn--d1abbgf6aiiy.xn--p1ai/'),
-            array('http://☎.com/'),
-            array('http://username:password@symfony.com'),
-            array('http://user.name:password@symfony.com'),
-            array('http://username:pass.word@symfony.com'),
-            array('http://user.name:pass.word@symfony.com'),
-            array('http://user-name@symfony.com'),
-            array('http://symfony.com?'),
-            array('http://symfony.com?query=1'),
-            array('http://symfony.com/?query=1'),
-            array('http://symfony.com#'),
-            array('http://symfony.com#fragment'),
-            array('http://symfony.com/#fragment'),
-            array('http://symfony.com/#one_more%20test'),
-        );
+        return [
+            ['http://a.pl'],
+            ['http://www.google.com'],
+            ['http://www.google.com.'],
+            ['http://www.google.museum'],
+            ['https://google.com/'],
+            ['https://google.com:80/'],
+            ['http://www.example.coop/'],
+            ['http://www.test-example.com/'],
+            ['http://www.symfony.com/'],
+            ['http://symfony.fake/blog/'],
+            ['http://symfony.com/?'],
+            ['http://symfony.com/search?type=&q=url+validator'],
+            ['http://symfony.com/#'],
+            ['http://symfony.com/#?'],
+            ['http://www.symfony.com/doc/current/book/validation.html#supported-constraints'],
+            ['http://very.long.domain.name.com/'],
+            ['http://localhost/'],
+            ['http://myhost123/'],
+            ['http://127.0.0.1/'],
+            ['http://127.0.0.1:80/'],
+            ['http://[::1]/'],
+            ['http://[::1]:80/'],
+            ['http://[1:2:3::4:5:6:7]/'],
+            ['http://sãopaulo.com/'],
+            ['http://xn--sopaulo-xwa.com/'],
+            ['http://sãopaulo.com.br/'],
+            ['http://xn--sopaulo-xwa.com.br/'],
+            ['http://пример.испытание/'],
+            ['http://xn--e1afmkfd.xn--80akhbyknj4f/'],
+            ['http://مثال.إختبار/'],
+            ['http://xn--mgbh0fb.xn--kgbechtv/'],
+            ['http://例子.测试/'],
+            ['http://xn--fsqu00a.xn--0zwm56d/'],
+            ['http://例子.測試/'],
+            ['http://xn--fsqu00a.xn--g6w251d/'],
+            ['http://例え.テスト/'],
+            ['http://xn--r8jz45g.xn--zckzah/'],
+            ['http://مثال.آزمایشی/'],
+            ['http://xn--mgbh0fb.xn--hgbk6aj7f53bba/'],
+            ['http://실례.테스트/'],
+            ['http://xn--9n2bp8q.xn--9t4b11yi5a/'],
+            ['http://العربية.idn.icann.org/'],
+            ['http://xn--ogb.idn.icann.org/'],
+            ['http://xn--e1afmkfd.xn--80akhbyknj4f.xn--e1afmkfd/'],
+            ['http://xn--espaa-rta.xn--ca-ol-fsay5a/'],
+            ['http://xn--d1abbgf6aiiy.xn--p1ai/'],
+            ['http://☎.com/'],
+            ['http://username:password@symfony.com'],
+            ['http://user.name:password@symfony.com'],
+            ['http://username:pass.word@symfony.com'],
+            ['http://user.name:pass.word@symfony.com'],
+            ['http://user-name@symfony.com'],
+            ['http://symfony.com?'],
+            ['http://symfony.com?query=1'],
+            ['http://symfony.com/?query=1'],
+            ['http://symfony.com#'],
+            ['http://symfony.com#fragment'],
+            ['http://symfony.com/#fragment'],
+            ['http://symfony.com/#one_more%20test'],
+        ];
     }
 
     /**
@@ -159,9 +159,9 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidUrls($url)
     {
-        $constraint = new Url(array(
+        $constraint = new Url([
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($url, $constraint);
 
@@ -177,10 +177,10 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidRelativeUrl($url)
     {
-        $constraint = new Url(array(
+        $constraint = new Url([
             'message' => 'myMessage',
             'relativeProtocol' => true,
-        ));
+        ]);
 
         $this->validator->validate($url, $constraint);
 
@@ -192,50 +192,50 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidRelativeUrls()
     {
-        return array(
-            array('/google.com'),
-            array('//goog_le.com'),
-            array('//google.com::aa'),
-            array('//google.com:aa'),
-            array('//127.0.0.1:aa/'),
-            array('//[::1'),
-            array('//hello.☎/'),
-            array('//:password@symfony.com'),
-            array('//:password@@symfony.com'),
-            array('//username:passwordsymfony.com'),
-            array('//usern@me:password@symfony.com'),
-            array('//example.com/exploit.html?<script>alert(1);</script>'),
-            array('//example.com/exploit.html?hel lo'),
-            array('//example.com/exploit.html?not_a%hex'),
-            array('//'),
-        );
+        return [
+            ['/google.com'],
+            ['//goog_le.com'],
+            ['//google.com::aa'],
+            ['//google.com:aa'],
+            ['//127.0.0.1:aa/'],
+            ['//[::1'],
+            ['//hello.☎/'],
+            ['//:password@symfony.com'],
+            ['//:password@@symfony.com'],
+            ['//username:passwordsymfony.com'],
+            ['//usern@me:password@symfony.com'],
+            ['//example.com/exploit.html?<script>alert(1);</script>'],
+            ['//example.com/exploit.html?hel lo'],
+            ['//example.com/exploit.html?not_a%hex'],
+            ['//'],
+        ];
     }
 
     public function getInvalidUrls()
     {
-        return array(
-            array('google.com'),
-            array('://google.com'),
-            array('http ://google.com'),
-            array('http:/google.com'),
-            array('http://goog_le.com'),
-            array('http://google.com::aa'),
-            array('http://google.com:aa'),
-            array('ftp://google.fr'),
-            array('faked://google.fr'),
-            array('http://127.0.0.1:aa/'),
-            array('ftp://[::1]/'),
-            array('http://[::1'),
-            array('http://hello.☎/'),
-            array('http://:password@symfony.com'),
-            array('http://:password@@symfony.com'),
-            array('http://username:passwordsymfony.com'),
-            array('http://usern@me:password@symfony.com'),
-            array('http://example.com/exploit.html?<script>alert(1);</script>'),
-            array('http://example.com/exploit.html?hel lo'),
-            array('http://example.com/exploit.html?not_a%hex'),
-            array('http://'),
-        );
+        return [
+            ['google.com'],
+            ['://google.com'],
+            ['http ://google.com'],
+            ['http:/google.com'],
+            ['http://goog_le.com'],
+            ['http://google.com::aa'],
+            ['http://google.com:aa'],
+            ['ftp://google.fr'],
+            ['faked://google.fr'],
+            ['http://127.0.0.1:aa/'],
+            ['ftp://[::1]/'],
+            ['http://[::1'],
+            ['http://hello.☎/'],
+            ['http://:password@symfony.com'],
+            ['http://:password@@symfony.com'],
+            ['http://username:passwordsymfony.com'],
+            ['http://usern@me:password@symfony.com'],
+            ['http://example.com/exploit.html?<script>alert(1);</script>'],
+            ['http://example.com/exploit.html?hel lo'],
+            ['http://example.com/exploit.html?not_a%hex'],
+            ['http://'],
+        ];
     }
 
     /**
@@ -243,9 +243,9 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCustomProtocolIsValid($url)
     {
-        $constraint = new Url(array(
-            'protocols' => array('ftp', 'file', 'git'),
-        ));
+        $constraint = new Url([
+            'protocols' => ['ftp', 'file', 'git'],
+        ]);
 
         $this->validator->validate($url, $constraint);
 
@@ -254,11 +254,11 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidCustomUrls()
     {
-        return array(
-            array('ftp://google.com'),
-            array('file://127.0.0.1'),
-            array('git://[::1]/'),
-        );
+        return [
+            ['ftp://google.com'],
+            ['file://127.0.0.1'],
+            ['git://[::1]/'],
+        ];
     }
 
     /**
@@ -269,12 +269,12 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCheckDns($violation)
     {
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => $violation ? '' : 'A'))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => $violation ? '' : 'A']]]);
 
-        $constraint = new Url(array(
+        $constraint = new Url([
             'checkDNS' => 'ANY',
             'dnsMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('http://example.com', $constraint);
 
@@ -290,7 +290,7 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
 
     public function getCheckDns()
     {
-        return array(array(true), array(false));
+        return [[true], [false]];
     }
 
     /**
@@ -301,12 +301,12 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCheckDnsByType($type)
     {
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => $type))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => $type]]]);
 
-        $constraint = new Url(array(
+        $constraint = new Url([
             'checkDNS' => $type,
             'dnsMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('http://example.com', $constraint);
 
@@ -315,20 +315,20 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
 
     public function getCheckDnsTypes()
     {
-        return array(
-            array('ANY'),
-            array('A'),
-            array('A6'),
-            array('AAAA'),
-            array('CNAME'),
-            array('MX'),
-            array('NAPTR'),
-            array('NS'),
-            array('PTR'),
-            array('SOA'),
-            array('SRV'),
-            array('TXT'),
-        );
+        return [
+            ['ANY'],
+            ['A'],
+            ['A6'],
+            ['AAAA'],
+            ['CNAME'],
+            ['MX'],
+            ['NAPTR'],
+            ['NS'],
+            ['PTR'],
+            ['SOA'],
+            ['SRV'],
+            ['TXT'],
+        ];
     }
 
     /**
@@ -340,12 +340,12 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCheckDnsWithInvalidType()
     {
-        DnsMock::withMockedHosts(array('example.com' => array(array('type' => 'A'))));
+        DnsMock::withMockedHosts(['example.com' => [['type' => 'A']]]);
 
-        $constraint = new Url(array(
+        $constraint = new Url([
             'checkDNS' => 'BOGUS',
             'dnsMessage' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate('http://example.com', $constraint);
     }
@@ -356,9 +356,9 @@ class UrlValidatorTest extends ConstraintValidatorTestCase
      */
     public function testCheckDnsOptionIsDeprecated()
     {
-        $constraint = new Url(array(
+        $constraint = new Url([
             'checkDNS' => Url::CHECK_DNS_TYPE_NONE,
-        ));
+        ]);
 
         $this->validator->validate('http://example.com', $constraint);
     }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/UuidValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/UuidValidatorTest.php
index a83a7599ae..aa1f351b23 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/UuidValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/UuidValidatorTest.php
@@ -75,14 +75,14 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidStrictUuids()
     {
-        return array(
-            array('216fff40-98d9-11e3-a5e2-0800200c9a66'), // Version 1 UUID in lowercase
-            array('216fff40-98d9-11e3-a5e2-0800200c9a66', array(Uuid::V1_MAC)),
-            array('216FFF40-98D9-11E3-A5E2-0800200C9A66'), // Version 1 UUID in UPPERCASE
-            array('456daefb-5aa6-41b5-8dbc-068b05a8b201'), // Version 4 UUID in lowercase
-            array('456daEFb-5AA6-41B5-8DBC-068B05A8B201'), // Version 4 UUID in mixed case
-            array('456daEFb-5AA6-41B5-8DBC-068B05A8B201', array(Uuid::V4_RANDOM)),
-        );
+        return [
+            ['216fff40-98d9-11e3-a5e2-0800200c9a66'], // Version 1 UUID in lowercase
+            ['216fff40-98d9-11e3-a5e2-0800200c9a66', [Uuid::V1_MAC]],
+            ['216FFF40-98D9-11E3-A5E2-0800200C9A66'], // Version 1 UUID in UPPERCASE
+            ['456daefb-5aa6-41b5-8dbc-068b05a8b201'], // Version 4 UUID in lowercase
+            ['456daEFb-5AA6-41B5-8DBC-068B05A8B201'], // Version 4 UUID in mixed case
+            ['456daEFb-5AA6-41B5-8DBC-068B05A8B201', [Uuid::V4_RANDOM]],
+        ];
     }
 
     /**
@@ -90,9 +90,9 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidStrictUuids($uuid, $code, $versions = null)
     {
-        $constraint = new Uuid(array(
+        $constraint = new Uuid([
             'message' => 'testMessage',
-        ));
+        ]);
 
         if (null !== $versions) {
             $constraint->versions = $versions;
@@ -108,48 +108,48 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidStrictUuids()
     {
-        return array(
-            array('216fff40-98d9-11e3-a5e2_0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216Gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216fff40-98d9-11e3-a5e-20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216f-ff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800-200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c-9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff40-98d9-11e3-a5e20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff4098d911e3a5e20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c9a6', Uuid::TOO_SHORT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c9a666', Uuid::TOO_LONG_ERROR),
-            array('216fff40-98d9-01e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-61e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-71e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-81e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-91e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-a1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-b1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-c1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-d1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-e1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-f1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR, array(Uuid::V2_DCE, Uuid::V3_MD5, Uuid::V4_RANDOM, Uuid::V5_SHA1)),
-            array('216fff40-98d9-21e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR, array(Uuid::V1_MAC, Uuid::V3_MD5, Uuid::V4_RANDOM, Uuid::V5_SHA1)),
-            array('216fff40-98d9-11e3-05e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-15e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-25e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-35e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-45e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-55e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-65e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-75e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-c5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-d5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-e5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
-            array('216fff40-98d9-11e3-f5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR),
+        return [
+            ['216fff40-98d9-11e3-a5e2_0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216Gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216fff40-98d9-11e3-a5e-20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216f-ff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800-200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c-9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff40-98d9-11e3-a5e20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff4098d911e3a5e20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c9a6', Uuid::TOO_SHORT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c9a666', Uuid::TOO_LONG_ERROR],
+            ['216fff40-98d9-01e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-61e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-71e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-81e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-91e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-a1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-b1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-c1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-d1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-e1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-f1e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR, [Uuid::V2_DCE, Uuid::V3_MD5, Uuid::V4_RANDOM, Uuid::V5_SHA1]],
+            ['216fff40-98d9-21e3-a5e2-0800200c9a66', Uuid::INVALID_VERSION_ERROR, [Uuid::V1_MAC, Uuid::V3_MD5, Uuid::V4_RANDOM, Uuid::V5_SHA1]],
+            ['216fff40-98d9-11e3-05e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-15e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-25e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-35e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-45e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-55e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-65e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-75e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-c5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-d5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-e5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
+            ['216fff40-98d9-11e3-f5e2-0800200c9a66', Uuid::INVALID_VARIANT_ERROR],
 
             // Non-standard UUID allowed by some other systems
-            array('{216fff40-98d9-11e3-a5e2-0800200c9a66}', Uuid::INVALID_CHARACTERS_ERROR),
-            array('[216fff40-98d9-11e3-a5e2-0800200c9a66]', Uuid::INVALID_CHARACTERS_ERROR),
-        );
+            ['{216fff40-98d9-11e3-a5e2-0800200c9a66}', Uuid::INVALID_CHARACTERS_ERROR],
+            ['[216fff40-98d9-11e3-a5e2-0800200c9a66]', Uuid::INVALID_CHARACTERS_ERROR],
+        ];
     }
 
     /**
@@ -157,9 +157,9 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
      */
     public function testValidNonStrictUuids($uuid)
     {
-        $constraint = new Uuid(array(
+        $constraint = new Uuid([
             'strict' => false,
-        ));
+        ]);
 
         $this->validator->validate($uuid, $constraint);
 
@@ -168,19 +168,19 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
 
     public function getValidNonStrictUuids()
     {
-        return array(
-            array('216fff40-98d9-11e3-a5e2-0800200c9a66'),    // Version 1 UUID in lowercase
-            array('216FFF40-98D9-11E3-A5E2-0800200C9A66'),    // Version 1 UUID in UPPERCASE
-            array('456daefb-5aa6-41b5-8dbc-068b05a8b201'),    // Version 4 UUID in lowercase
-            array('456DAEFb-5AA6-41B5-8DBC-068b05a8B201'),    // Version 4 UUID in mixed case
+        return [
+            ['216fff40-98d9-11e3-a5e2-0800200c9a66'],    // Version 1 UUID in lowercase
+            ['216FFF40-98D9-11E3-A5E2-0800200C9A66'],    // Version 1 UUID in UPPERCASE
+            ['456daefb-5aa6-41b5-8dbc-068b05a8b201'],    // Version 4 UUID in lowercase
+            ['456DAEFb-5AA6-41B5-8DBC-068b05a8B201'],    // Version 4 UUID in mixed case
 
             // Non-standard UUIDs allowed by some other systems
-            array('216f-ff40-98d9-11e3-a5e2-0800-200c-9a66'), // Non-standard dash positions (every 4 chars)
-            array('216fff40-98d911e3-a5e20800-200c9a66'),     // Non-standard dash positions (every 8 chars)
-            array('216fff4098d911e3a5e20800200c9a66'),        // No dashes at all
-            array('{216fff40-98d9-11e3-a5e2-0800200c9a66}'),  // Wrapped with curly braces
-            array('[216fff40-98d9-11e3-a5e2-0800200c9a66]'),  // Wrapped with squared braces
-        );
+            ['216f-ff40-98d9-11e3-a5e2-0800-200c-9a66'], // Non-standard dash positions (every 4 chars)
+            ['216fff40-98d911e3-a5e20800-200c9a66'],     // Non-standard dash positions (every 8 chars)
+            ['216fff4098d911e3a5e20800200c9a66'],        // No dashes at all
+            ['{216fff40-98d9-11e3-a5e2-0800200c9a66}'],  // Wrapped with curly braces
+            ['[216fff40-98d9-11e3-a5e2-0800200c9a66]'],  // Wrapped with squared braces
+        ];
     }
 
     /**
@@ -188,10 +188,10 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
      */
     public function testInvalidNonStrictUuids($uuid, $code)
     {
-        $constraint = new Uuid(array(
+        $constraint = new Uuid([
             'strict' => false,
             'message' => 'myMessage',
-        ));
+        ]);
 
         $this->validator->validate($uuid, $constraint);
 
@@ -203,14 +203,14 @@ class UuidValidatorTest extends ConstraintValidatorTestCase
 
     public function getInvalidNonStrictUuids()
     {
-        return array(
-            array('216fff40-98d9-11e3-a5e2_0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216Gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216fff40-98d9-11e3-a5e2_0800200c9a6', Uuid::INVALID_CHARACTERS_ERROR),
-            array('216fff40-98d9-11e3-a5e-20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c9a6', Uuid::TOO_SHORT_ERROR),
-            array('216fff40-98d9-11e3-a5e2-0800200c9a666', Uuid::TOO_LONG_ERROR),
-        );
+        return [
+            ['216fff40-98d9-11e3-a5e2_0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216Gff40-98d9-11e3-a5e2-0800200c9a66', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216fff40-98d9-11e3-a5e2_0800200c9a6', Uuid::INVALID_CHARACTERS_ERROR],
+            ['216fff40-98d9-11e3-a5e-20800200c9a66', Uuid::INVALID_HYPHEN_PLACEMENT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c9a6', Uuid::TOO_SHORT_ERROR],
+            ['216fff40-98d9-11e3-a5e2-0800200c9a666', Uuid::TOO_LONG_ERROR],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
index 9928bd82d0..7245dc90ad 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ValidTest.php
@@ -21,9 +21,9 @@ class ValidTest extends TestCase
 {
     public function testGroupsCanBeSet()
     {
-        $constraint = new Valid(array('groups' => 'foo'));
+        $constraint = new Valid(['groups' => 'foo']);
 
-        $this->assertSame(array('foo'), $constraint->groups);
+        $this->assertSame(['foo'], $constraint->groups);
     }
 
     public function testGroupsAreNullByDefault()
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/ValidValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/ValidValidatorTest.php
index c4ccf1551f..0ec1d42137 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/ValidValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/ValidValidatorTest.php
@@ -14,7 +14,7 @@ class ValidValidatorTest extends TestCase
         $validatorBuilder = new ValidatorBuilder();
         $validator = $validatorBuilder->enableAnnotationMapping()->getValidator();
 
-        $violations = $validator->validate(new Foo(), null, array('nested'));
+        $violations = $validator->validate(new Foo(), null, ['nested']);
 
         $this->assertCount(1, $violations);
         $this->assertSame('fooBar.fooBarBaz.foo', $violations->get(0)->getPropertyPath());
@@ -27,7 +27,7 @@ class ValidValidatorTest extends TestCase
 
         $foo = new Foo();
         $foo->fooBar = null;
-        $violations = $validator->validate($foo, null, array('nested'));
+        $violations = $validator->validate($foo, null, ['nested']);
 
         $this->assertCount(0, $violations);
     }
diff --git a/src/Symfony/Component/Validator/Tests/DataCollector/ValidatorDataCollectorTest.php b/src/Symfony/Component/Validator/Tests/DataCollector/ValidatorDataCollectorTest.php
index b28650c30e..f32acf228b 100644
--- a/src/Symfony/Component/Validator/Tests/DataCollector/ValidatorDataCollectorTest.php
+++ b/src/Symfony/Component/Validator/Tests/DataCollector/ValidatorDataCollectorTest.php
@@ -27,10 +27,10 @@ class ValidatorDataCollectorTest extends TestCase
 
         $collector = new ValidatorDataCollector($validator);
 
-        $violations = new ConstraintViolationList(array(
+        $violations = new ConstraintViolationList([
             $this->createMock(ConstraintViolation::class),
             $this->createMock(ConstraintViolation::class),
-        ));
+        ]);
         $originalValidator->method('validate')->willReturn($violations);
 
         $validator->validate(new \stdClass());
@@ -57,10 +57,10 @@ class ValidatorDataCollectorTest extends TestCase
 
         $collector = new ValidatorDataCollector($validator);
 
-        $violations = new ConstraintViolationList(array(
+        $violations = new ConstraintViolationList([
             $this->createMock(ConstraintViolation::class),
             $this->createMock(ConstraintViolation::class),
-        ));
+        ]);
         $originalValidator->method('validate')->willReturn($violations);
 
         $validator->validate(new \stdClass());
diff --git a/src/Symfony/Component/Validator/Tests/DependencyInjection/AddConstraintValidatorsPassTest.php b/src/Symfony/Component/Validator/Tests/DependencyInjection/AddConstraintValidatorsPassTest.php
index c47cbcc94d..c3224840bb 100644
--- a/src/Symfony/Component/Validator/Tests/DependencyInjection/AddConstraintValidatorsPassTest.php
+++ b/src/Symfony/Component/Validator/Tests/DependencyInjection/AddConstraintValidatorsPassTest.php
@@ -25,21 +25,21 @@ class AddConstraintValidatorsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $validatorFactory = $container->register('validator.validator_factory')
-            ->addArgument(array());
+            ->addArgument([]);
 
         $container->register('my_constraint_validator_service1', Validator1::class)
-            ->addTag('validator.constraint_validator', array('alias' => 'my_constraint_validator_alias1'));
+            ->addTag('validator.constraint_validator', ['alias' => 'my_constraint_validator_alias1']);
         $container->register('my_constraint_validator_service2', Validator2::class)
             ->addTag('validator.constraint_validator');
 
         $addConstraintValidatorsPass = new AddConstraintValidatorsPass();
         $addConstraintValidatorsPass->process($container);
 
-        $expected = (new Definition(ServiceLocator::class, array(array(
+        $expected = (new Definition(ServiceLocator::class, [[
             Validator1::class => new ServiceClosureArgument(new Reference('my_constraint_validator_service1')),
             'my_constraint_validator_alias1' => new ServiceClosureArgument(new Reference('my_constraint_validator_service1')),
             Validator2::class => new ServiceClosureArgument(new Reference('my_constraint_validator_service2')),
-        ))))->addTag('container.service_locator')->setPublic(false);
+        ]]))->addTag('container.service_locator')->setPublic(false);
         $this->assertEquals($expected, $container->getDefinition((string) $validatorFactory->getArgument(0)));
     }
 
@@ -51,7 +51,7 @@ class AddConstraintValidatorsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('validator.validator_factory')
-            ->addArgument(array());
+            ->addArgument([]);
 
         $container->register('my_abstract_constraint_validator')
             ->setAbstract(true)
diff --git a/src/Symfony/Component/Validator/Tests/DependencyInjection/AddValidatorInitializersPassTest.php b/src/Symfony/Component/Validator/Tests/DependencyInjection/AddValidatorInitializersPassTest.php
index ff7e28a29e..42d7553e13 100644
--- a/src/Symfony/Component/Validator/Tests/DependencyInjection/AddValidatorInitializersPassTest.php
+++ b/src/Symfony/Component/Validator/Tests/DependencyInjection/AddValidatorInitializersPassTest.php
@@ -36,13 +36,13 @@ class AddValidatorInitializersPassTest extends TestCase
         ;
         $container
             ->register('validator.builder')
-            ->addArgument(array())
+            ->addArgument([])
         ;
 
         (new AddValidatorInitializersPass())->process($container);
 
         $this->assertEquals(
-            array(array('addObjectInitializers', array(array(new Reference('initializer1'), new Reference('initializer2'))))),
+            [['addObjectInitializers', [[new Reference('initializer1'), new Reference('initializer2')]]]],
             $container->getDefinition('validator.builder')->getMethodCalls()
         );
     }
@@ -59,7 +59,7 @@ class AddValidatorInitializersPassTest extends TestCase
         $container = new ContainerBuilder();
         $container
             ->register('validator.builder')
-            ->addMethodCall('setTranslator', array(new Reference('translator')))
+            ->addMethodCall('setTranslator', [new Reference('translator')])
         ;
 
         $container->register('translator', TestTranslator::class);
@@ -67,7 +67,7 @@ class AddValidatorInitializersPassTest extends TestCase
         (new AddValidatorInitializersPass())->process($container);
 
         $this->assertEquals(
-            array(array('setTranslator', array((new Definition(LegacyTranslatorProxy::class))->addArgument(new Reference('translator'))))),
+            [['setTranslator', [(new Definition(LegacyTranslatorProxy::class))->addArgument(new Reference('translator'))]]],
             $container->getDefinition('validator.builder')->removeMethodCall('addObjectInitializers')->getMethodCalls()
         );
     }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintA.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintA.php
index 8a196dcc91..17ba03673d 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintA.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintA.php
@@ -26,6 +26,6 @@ class ConstraintA extends Constraint
 
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintAValidator.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintAValidator.php
index 867b024c27..8b0d30f571 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintAValidator.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintAValidator.php
@@ -29,7 +29,7 @@ class ConstraintAValidator extends ConstraintValidator
     public function validate($value, Constraint $constraint)
     {
         if ('VALID' != $value) {
-            $this->context->addViolation('message', array('param' => 'value'));
+            $this->context->addViolation('message', ['param' => 'value']);
 
             return;
         }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintB.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintB.php
index 6258923372..99d1951e5d 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintB.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintB.php
@@ -18,6 +18,6 @@ class ConstraintB extends Constraint
 {
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintC.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintC.php
index b0418b8718..675066ef02 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintC.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintC.php
@@ -20,11 +20,11 @@ class ConstraintC extends Constraint
 
     public function getRequiredOptions()
     {
-        return array('option1');
+        return ['option1'];
     }
 
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValue.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValue.php
index 4ebd981eef..b3fbd7083c 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValue.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValue.php
@@ -26,6 +26,6 @@ class ConstraintWithValue extends Constraint
 
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValueAsDefault.php b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValueAsDefault.php
index a975e0787f..618cca74df 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValueAsDefault.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/ConstraintWithValueAsDefault.php
@@ -26,6 +26,6 @@ class ConstraintWithValueAsDefault extends Constraint
 
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php b/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
index feb25318eb..ac48a512c6 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/CustomArrayObject.php
@@ -21,7 +21,7 @@ class CustomArrayObject implements \ArrayAccess, \IteratorAggregate, \Countable,
 
     public function __construct(array $array = null)
     {
-        $this->array = $array ?: array();
+        $this->array = $array ?: [];
     }
 
     public function offsetExists($offset)
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCar.php b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCar.php
index 0b384872db..af90ddc747 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCar.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCar.php
@@ -18,6 +18,6 @@ class EntityStaticCar extends EntityStaticVehicle
 {
     public static function loadValidatorMetadata(ClassMetadata $metadata)
     {
-        $metadata->addPropertyConstraint('wheels', new Length(array('max' => 99)));
+        $metadata->addPropertyConstraint('wheels', new Length(['max' => 99]));
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCarTurbo.php b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCarTurbo.php
index abf1edbdd1..d559074db6 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCarTurbo.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticCarTurbo.php
@@ -18,6 +18,6 @@ class EntityStaticCarTurbo extends EntityStaticCar
 {
     public static function loadValidatorMetadata(ClassMetadata $metadata)
     {
-        $metadata->addPropertyConstraint('wheels', new Length(array('max' => 99)));
+        $metadata->addPropertyConstraint('wheels', new Length(['max' => 99]));
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticVehicle.php b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticVehicle.php
index 9ce72935de..1190318fa5 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticVehicle.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/EntityStaticVehicle.php
@@ -20,6 +20,6 @@ class EntityStaticVehicle
 
     public static function loadValidatorMetadata(ClassMetadata $metadata)
     {
-        $metadata->addPropertyConstraint('wheels', new Length(array('max' => 99)));
+        $metadata->addPropertyConstraint('wheels', new Length(['max' => 99]));
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraint.php b/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraint.php
index 03019fc37c..4ea07f7436 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraint.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraint.php
@@ -19,6 +19,6 @@ class FailingConstraint extends Constraint
 
     public function getTargets()
     {
-        return array(self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT);
+        return [self::PROPERTY_CONSTRAINT, self::CLASS_CONSTRAINT];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraintValidator.php b/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraintValidator.php
index a019dd6f83..1224643851 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraintValidator.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/FailingConstraintValidator.php
@@ -18,6 +18,6 @@ class FailingConstraintValidator extends ConstraintValidator
 {
     public function validate($value, Constraint $constraint)
     {
-        $this->context->addViolation($constraint->message, array());
+        $this->context->addViolation($constraint->message, []);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/FakeClassMetadata.php b/src/Symfony/Component/Validator/Tests/Fixtures/FakeClassMetadata.php
index 8c76a21598..39f5477779 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/FakeClassMetadata.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/FakeClassMetadata.php
@@ -18,7 +18,7 @@ class FakeClassMetadata extends ClassMetadata
     public function addCustomPropertyMetadata($propertyName, $metadata)
     {
         if (!isset($this->members[$propertyName])) {
-            $this->members[$propertyName] = array();
+            $this->members[$propertyName] = [];
         }
 
         $this->members[$propertyName][] = $metadata;
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php b/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
index 1b5a704d46..5e34929be3 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/FakeMetadataFactory.php
@@ -17,7 +17,7 @@ use Symfony\Component\Validator\MetadataInterface;
 
 class FakeMetadataFactory implements MetadataFactoryInterface
 {
-    protected $metadatas = array();
+    protected $metadatas = [];
 
     public function getMetadataFor($class)
     {
diff --git a/src/Symfony/Component/Validator/Tests/Fixtures/GroupSequenceProviderEntity.php b/src/Symfony/Component/Validator/Tests/Fixtures/GroupSequenceProviderEntity.php
index 2b0beaf9ad..77b3bf2f7b 100644
--- a/src/Symfony/Component/Validator/Tests/Fixtures/GroupSequenceProviderEntity.php
+++ b/src/Symfony/Component/Validator/Tests/Fixtures/GroupSequenceProviderEntity.php
@@ -22,7 +22,7 @@ class GroupSequenceProviderEntity implements GroupSequenceProviderInterface
     public $firstName;
     public $lastName;
 
-    protected $sequence = array();
+    protected $sequence = [];
 
     public function __construct($sequence)
     {
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Cache/AbstractCacheTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Cache/AbstractCacheTest.php
index 6083f65e28..4d0363fd71 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Cache/AbstractCacheTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Cache/AbstractCacheTest.php
@@ -26,7 +26,7 @@ abstract class AbstractCacheTest extends TestCase
     {
         $meta = $this->getMockBuilder(ClassMetadata::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('getClassName'))
+            ->setMethods(['getClassName'])
             ->getMock();
 
         $meta->expects($this->once())
@@ -46,7 +46,7 @@ abstract class AbstractCacheTest extends TestCase
     {
         $meta = $this->getMockBuilder(ClassMetadata::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('getClassName'))
+            ->setMethods(['getClassName'])
             ->getMock();
 
         $meta->expects($this->once())
@@ -63,7 +63,7 @@ abstract class AbstractCacheTest extends TestCase
     {
         $meta = $this->getMockBuilder(ClassMetadata::class)
             ->disableOriginalConstructor()
-            ->setMethods(array('getClassName'))
+            ->setMethods(['getClassName'])
             ->getMock();
 
         $meta->expects($this->once())
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
index 361899b9f5..f2193d0bd5 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/ClassMetadataTest.php
@@ -57,17 +57,17 @@ class ClassMetadataTest extends TestCase
         $this->metadata->addPropertyConstraint('firstName', new ConstraintA());
         $this->metadata->addPropertyConstraint('lastName', new ConstraintB());
 
-        $this->assertEquals(array('firstName', 'lastName'), $this->metadata->getConstrainedProperties());
+        $this->assertEquals(['firstName', 'lastName'], $this->metadata->getConstrainedProperties());
     }
 
     public function testAddMultiplePropertyConstraints()
     {
-        $this->metadata->addPropertyConstraints('lastName', array(new ConstraintA(), new ConstraintB()));
+        $this->metadata->addPropertyConstraints('lastName', [new ConstraintA(), new ConstraintB()]);
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array('Default', 'Entity'))),
-            new ConstraintB(array('groups' => array('Default', 'Entity'))),
-        );
+        $constraints = [
+            new ConstraintA(['groups' => ['Default', 'Entity']]),
+            new ConstraintB(['groups' => ['Default', 'Entity']]),
+        ];
 
         $properties = $this->metadata->getPropertyMetadata('lastName');
 
@@ -81,10 +81,10 @@ class ClassMetadataTest extends TestCase
         $this->metadata->addGetterConstraint('lastName', new ConstraintA());
         $this->metadata->addGetterConstraint('lastName', new ConstraintB());
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array('Default', 'Entity'))),
-            new ConstraintB(array('groups' => array('Default', 'Entity'))),
-        );
+        $constraints = [
+            new ConstraintA(['groups' => ['Default', 'Entity']]),
+            new ConstraintB(['groups' => ['Default', 'Entity']]),
+        ];
 
         $properties = $this->metadata->getPropertyMetadata('lastName');
 
@@ -95,12 +95,12 @@ class ClassMetadataTest extends TestCase
 
     public function testAddMultipleGetterConstraints()
     {
-        $this->metadata->addGetterConstraints('lastName', array(new ConstraintA(), new ConstraintB()));
+        $this->metadata->addGetterConstraints('lastName', [new ConstraintA(), new ConstraintB()]);
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array('Default', 'Entity'))),
-            new ConstraintB(array('groups' => array('Default', 'Entity'))),
-        );
+        $constraints = [
+            new ConstraintA(['groups' => ['Default', 'Entity']]),
+            new ConstraintB(['groups' => ['Default', 'Entity']]),
+        ];
 
         $properties = $this->metadata->getPropertyMetadata('lastName');
 
@@ -117,17 +117,17 @@ class ClassMetadataTest extends TestCase
         $this->metadata->mergeConstraints($parent);
         $this->metadata->addConstraint(new ConstraintA());
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array(
+        $constraints = [
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityParent',
                 'Entity',
-            ))),
-            new ConstraintA(array('groups' => array(
+            ]]),
+            new ConstraintA(['groups' => [
                 'Default',
                 'Entity',
-            ))),
-        );
+            ]]),
+        ];
 
         $this->assertEquals($constraints, $this->metadata->getConstraints());
     }
@@ -136,46 +136,46 @@ class ClassMetadataTest extends TestCase
     {
         $parent = new ClassMetadata(self::PARENTCLASS);
         $parent->addPropertyConstraint('firstName', new ConstraintA());
-        $parent->addPropertyConstraint('firstName', new ConstraintB(array('groups' => 'foo')));
+        $parent->addPropertyConstraint('firstName', new ConstraintB(['groups' => 'foo']));
 
         $this->metadata->mergeConstraints($parent);
         $this->metadata->addPropertyConstraint('firstName', new ConstraintA());
 
-        $constraintA1 = new ConstraintA(array('groups' => array(
+        $constraintA1 = new ConstraintA(['groups' => [
             'Default',
             'EntityParent',
             'Entity',
-        )));
-        $constraintA2 = new ConstraintA(array('groups' => array(
+        ]]);
+        $constraintA2 = new ConstraintA(['groups' => [
             'Default',
             'Entity',
-        )));
-        $constraintB = new ConstraintB(array(
-            'groups' => array('foo'),
-        ));
+        ]]);
+        $constraintB = new ConstraintB([
+            'groups' => ['foo'],
+        ]);
 
-        $constraints = array(
+        $constraints = [
             $constraintA1,
             $constraintB,
             $constraintA2,
-        );
+        ];
 
-        $constraintsByGroup = array(
-            'Default' => array(
+        $constraintsByGroup = [
+            'Default' => [
                 $constraintA1,
                 $constraintA2,
-            ),
-            'EntityParent' => array(
+            ],
+            'EntityParent' => [
                 $constraintA1,
-            ),
-            'Entity' => array(
+            ],
+            'Entity' => [
                 $constraintA1,
                 $constraintA2,
-            ),
-            'foo' => array(
+            ],
+            'foo' => [
                 $constraintB,
-            ),
-        );
+            ],
+        ];
 
         $members = $this->metadata->getPropertyMetadata('firstName');
 
@@ -201,19 +201,19 @@ class ClassMetadataTest extends TestCase
         $this->metadata->mergeConstraints($parent);
         $this->metadata->addPropertyConstraint('internal', new ConstraintA());
 
-        $parentConstraints = array(
-            new ConstraintA(array('groups' => array(
+        $parentConstraints = [
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityParent',
                 'Entity',
-            ))),
-        );
-        $constraints = array(
-            new ConstraintA(array('groups' => array(
+            ]]),
+        ];
+        $constraints = [
+            new ConstraintA(['groups' => [
                 'Default',
                 'Entity',
-            ))),
-        );
+            ]]),
+        ];
 
         $members = $this->metadata->getPropertyMetadata('internal');
 
@@ -233,8 +233,8 @@ class ClassMetadataTest extends TestCase
 
     public function testSerialize()
     {
-        $this->metadata->addConstraint(new ConstraintA(array('property1' => 'A')));
-        $this->metadata->addConstraint(new ConstraintB(array('groups' => 'TestGroup')));
+        $this->metadata->addConstraint(new ConstraintA(['property1' => 'A']));
+        $this->metadata->addConstraint(new ConstraintB(['groups' => 'TestGroup']));
         $this->metadata->addPropertyConstraint('firstName', new ConstraintA());
         $this->metadata->addGetterConstraint('lastName', new ConstraintB());
 
@@ -245,7 +245,7 @@ class ClassMetadataTest extends TestCase
 
     public function testGroupSequencesWorkIfContainingDefaultGroup()
     {
-        $this->metadata->setGroupSequence(array('Foo', $this->metadata->getDefaultGroup()));
+        $this->metadata->setGroupSequence(['Foo', $this->metadata->getDefaultGroup()]);
 
         $this->assertInstanceOf('Symfony\Component\Validator\Constraints\GroupSequence', $this->metadata->getGroupSequence());
     }
@@ -255,7 +255,7 @@ class ClassMetadataTest extends TestCase
      */
     public function testGroupSequencesFailIfNotContainingDefaultGroup()
     {
-        $this->metadata->setGroupSequence(array('Foo', 'Bar'));
+        $this->metadata->setGroupSequence(['Foo', 'Bar']);
     }
 
     /**
@@ -263,7 +263,7 @@ class ClassMetadataTest extends TestCase
      */
     public function testGroupSequencesFailIfContainingDefault()
     {
-        $this->metadata->setGroupSequence(array('Foo', $this->metadata->getDefaultGroup(), Constraint::DEFAULT_GROUP));
+        $this->metadata->setGroupSequence(['Foo', $this->metadata->getDefaultGroup(), Constraint::DEFAULT_GROUP]);
     }
 
     /**
@@ -273,7 +273,7 @@ class ClassMetadataTest extends TestCase
     {
         $metadata = new ClassMetadata(self::PROVIDERCLASS);
         $metadata->setGroupSequenceProvider(true);
-        $metadata->setGroupSequence(array('GroupSequenceProviderEntity', 'Foo'));
+        $metadata->setGroupSequence(['GroupSequenceProviderEntity', 'Foo']);
     }
 
     /**
@@ -282,7 +282,7 @@ class ClassMetadataTest extends TestCase
     public function testGroupSequenceProviderFailsIfGroupSequenceIsSet()
     {
         $metadata = new ClassMetadata(self::PROVIDERCLASS);
-        $metadata->setGroupSequence(array('GroupSequenceProviderEntity', 'Foo'));
+        $metadata->setGroupSequence(['GroupSequenceProviderEntity', 'Foo']);
         $metadata->setGroupSequenceProvider(true);
     }
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
index de6852271e..a7876d7f91 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Factory/LazyLoadingMetadataFactoryTest.php
@@ -31,10 +31,10 @@ class LazyLoadingMetadataFactoryTest extends TestCase
         $factory = new LazyLoadingMetadataFactory(new TestLoader());
         $metadata = $factory->getMetadataFor(self::PARENT_CLASS);
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array('Default', 'EntityParent'))),
-            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
-        );
+        $constraints = [
+            new ConstraintA(['groups' => ['Default', 'EntityParent']]),
+            new ConstraintA(['groups' => ['Default', 'EntityInterfaceA', 'EntityParent']]),
+        ];
 
         $this->assertEquals($constraints, $metadata->getConstraints());
     }
@@ -44,34 +44,34 @@ class LazyLoadingMetadataFactoryTest extends TestCase
         $factory = new LazyLoadingMetadataFactory(new TestLoader());
         $metadata = $factory->getMetadataFor(self::CLASS_NAME);
 
-        $constraints = array(
-            new ConstraintA(array('groups' => array(
+        $constraints = [
+            new ConstraintA(['groups' => [
                 'Default',
                 'Entity',
-            ))),
-            new ConstraintA(array('groups' => array(
+            ]]),
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityParent',
                 'Entity',
-            ))),
-            new ConstraintA(array('groups' => array(
+            ]]),
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityInterfaceA',
                 'EntityParent',
                 'Entity',
-            ))),
-            new ConstraintA(array('groups' => array(
+            ]]),
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityInterfaceB',
                 'Entity',
-            ))),
-            new ConstraintA(array('groups' => array(
+            ]]),
+            new ConstraintA(['groups' => [
                 'Default',
                 'EntityParentInterface',
                 'EntityInterfaceB',
                 'Entity',
-            ))),
-        );
+            ]]),
+        ];
 
         $this->assertEquals($constraints, $metadata->getConstraints());
     }
@@ -81,21 +81,21 @@ class LazyLoadingMetadataFactoryTest extends TestCase
         $cache = $this->getMockBuilder('Symfony\Component\Validator\Mapping\Cache\CacheInterface')->getMock();
         $factory = new LazyLoadingMetadataFactory(new TestLoader(), $cache);
 
-        $parentClassConstraints = array(
-            new ConstraintA(array('groups' => array('Default', 'EntityParent'))),
-            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA', 'EntityParent'))),
-        );
-        $interfaceAConstraints = array(
-            new ConstraintA(array('groups' => array('Default', 'EntityInterfaceA'))),
-        );
+        $parentClassConstraints = [
+            new ConstraintA(['groups' => ['Default', 'EntityParent']]),
+            new ConstraintA(['groups' => ['Default', 'EntityInterfaceA', 'EntityParent']]),
+        ];
+        $interfaceAConstraints = [
+            new ConstraintA(['groups' => ['Default', 'EntityInterfaceA']]),
+        ];
 
         $cache->expects($this->never())
               ->method('has');
         $cache->expects($this->exactly(2))
               ->method('read')
               ->withConsecutive(
-                  array($this->equalTo(self::PARENT_CLASS)),
-                  array($this->equalTo(self::INTERFACE_A_CLASS))
+                  [$this->equalTo(self::PARENT_CLASS)],
+                  [$this->equalTo(self::INTERFACE_A_CLASS)]
               )
               ->will($this->returnValue(false));
         $cache->expects($this->exactly(2))
@@ -135,8 +135,8 @@ class LazyLoadingMetadataFactoryTest extends TestCase
         $cache->expects($this->exactly(2))
               ->method('read')
               ->withConsecutive(
-                  array(self::PARENT_CLASS),
-                  array(self::INTERFACE_A_CLASS)
+                  [self::PARENT_CLASS],
+                  [self::INTERFACE_A_CLASS]
               )
               ->willReturnCallback(function ($name) use ($metadata, $parentClass, $interfaceClass) {
                   if ($parentClass == $name) {
@@ -194,7 +194,7 @@ class LazyLoadingMetadataFactoryTest extends TestCase
         $reader = new \Symfony\Component\Validator\Mapping\Loader\StaticMethodLoader();
         $factory = new LazyLoadingMetadataFactory($reader);
         $metadata = $factory->getMetadataFor('Symfony\Component\Validator\Tests\Fixtures\EntityStaticCarTurbo');
-        $groups = array();
+        $groups = [];
 
         foreach ($metadata->getPropertyMetadata('wheels') as $propertyMetadata) {
             $constraints = $propertyMetadata->getConstraints();
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
index 783e9b27d8..e500962429 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/AnnotationLoaderTest.php
@@ -52,23 +52,23 @@ class AnnotationLoaderTest extends TestCase
         $loader->loadClassMetadata($metadata);
 
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
-        $expected->setGroupSequence(array('Foo', 'Entity'));
+        $expected->setGroupSequence(['Foo', 'Entity']);
         $expected->addConstraint(new ConstraintA());
-        $expected->addConstraint(new Callback(array('Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback')));
-        $expected->addConstraint(new Callback(array('callback' => 'validateMe', 'payload' => 'foo')));
+        $expected->addConstraint(new Callback(['Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback']));
+        $expected->addConstraint(new Callback(['callback' => 'validateMe', 'payload' => 'foo']));
         $expected->addConstraint(new Callback('validateMeStatic'));
         $expected->addPropertyConstraint('firstName', new NotNull());
-        $expected->addPropertyConstraint('firstName', new Range(array('min' => 3)));
-        $expected->addPropertyConstraint('firstName', new All(array(new NotNull(), new Range(array('min' => 3)))));
-        $expected->addPropertyConstraint('firstName', new All(array('constraints' => array(new NotNull(), new Range(array('min' => 3))))));
-        $expected->addPropertyConstraint('firstName', new Collection(array('fields' => array(
-            'foo' => array(new NotNull(), new Range(array('min' => 3))),
-            'bar' => new Range(array('min' => 5)),
-        ))));
-        $expected->addPropertyConstraint('firstName', new Choice(array(
+        $expected->addPropertyConstraint('firstName', new Range(['min' => 3]));
+        $expected->addPropertyConstraint('firstName', new All([new NotNull(), new Range(['min' => 3])]));
+        $expected->addPropertyConstraint('firstName', new All(['constraints' => [new NotNull(), new Range(['min' => 3])]]));
+        $expected->addPropertyConstraint('firstName', new Collection(['fields' => [
+            'foo' => [new NotNull(), new Range(['min' => 3])],
+            'bar' => new Range(['min' => 5]),
+        ]]));
+        $expected->addPropertyConstraint('firstName', new Choice([
             'message' => 'Must be one of %choices%',
-            'choices' => array('A', 'B'),
-        )));
+            'choices' => ['A', 'B'],
+        ]));
         $expected->addPropertyConstraint('childA', new Valid());
         $expected->addPropertyConstraint('childB', new Valid());
         $expected->addGetterConstraint('lastName', new NotNull());
@@ -124,23 +124,23 @@ class AnnotationLoaderTest extends TestCase
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
         $expected->mergeConstraints($expected_parent);
 
-        $expected->setGroupSequence(array('Foo', 'Entity'));
+        $expected->setGroupSequence(['Foo', 'Entity']);
         $expected->addConstraint(new ConstraintA());
-        $expected->addConstraint(new Callback(array('Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback')));
-        $expected->addConstraint(new Callback(array('callback' => 'validateMe', 'payload' => 'foo')));
+        $expected->addConstraint(new Callback(['Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback']));
+        $expected->addConstraint(new Callback(['callback' => 'validateMe', 'payload' => 'foo']));
         $expected->addConstraint(new Callback('validateMeStatic'));
         $expected->addPropertyConstraint('firstName', new NotNull());
-        $expected->addPropertyConstraint('firstName', new Range(array('min' => 3)));
-        $expected->addPropertyConstraint('firstName', new All(array(new NotNull(), new Range(array('min' => 3)))));
-        $expected->addPropertyConstraint('firstName', new All(array('constraints' => array(new NotNull(), new Range(array('min' => 3))))));
-        $expected->addPropertyConstraint('firstName', new Collection(array('fields' => array(
-            'foo' => array(new NotNull(), new Range(array('min' => 3))),
-            'bar' => new Range(array('min' => 5)),
-        ))));
-        $expected->addPropertyConstraint('firstName', new Choice(array(
+        $expected->addPropertyConstraint('firstName', new Range(['min' => 3]));
+        $expected->addPropertyConstraint('firstName', new All([new NotNull(), new Range(['min' => 3])]));
+        $expected->addPropertyConstraint('firstName', new All(['constraints' => [new NotNull(), new Range(['min' => 3])]]));
+        $expected->addPropertyConstraint('firstName', new Collection(['fields' => [
+            'foo' => [new NotNull(), new Range(['min' => 3])],
+            'bar' => new Range(['min' => 5]),
+        ]]));
+        $expected->addPropertyConstraint('firstName', new Choice([
             'message' => 'Must be one of %choices%',
-            'choices' => array('A', 'B'),
-        )));
+            'choices' => ['A', 'B'],
+        ]));
         $expected->addPropertyConstraint('childA', new Valid());
         $expected->addPropertyConstraint('childB', new Valid());
         $expected->addGetterConstraint('lastName', new NotNull());
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
index 6fee7b6ff5..2cf009fc08 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/FilesLoaderTest.php
@@ -34,12 +34,12 @@ class FilesLoaderTest extends TestCase
 
     public function getFilesLoader(LoaderInterface $loader)
     {
-        return $this->getMockForAbstractClass('Symfony\Component\Validator\Tests\Fixtures\FilesLoader', array(array(
+        return $this->getMockForAbstractClass('Symfony\Component\Validator\Tests\Fixtures\FilesLoader', [[
             __DIR__.'/constraint-mapping.xml',
             __DIR__.'/constraint-mapping.yaml',
             __DIR__.'/constraint-mapping.test',
             __DIR__.'/constraint-mapping.txt',
-        ), $loader));
+        ], $loader]);
     }
 
     public function getFileLoader()
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
index 0d28b0a399..f9905386c9 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
@@ -31,10 +31,10 @@ class LoaderChainTest extends TestCase
             ->method('loadClassMetadata')
             ->with($this->equalTo($metadata));
 
-        $chain = new LoaderChain(array(
+        $chain = new LoaderChain([
             $loader1,
             $loader2,
-        ));
+        ]);
 
         $chain->loadClassMetadata($metadata);
     }
@@ -53,10 +53,10 @@ class LoaderChainTest extends TestCase
             ->method('loadClassMetadata')
             ->will($this->returnValue(false));
 
-        $chain = new LoaderChain(array(
+        $chain = new LoaderChain([
             $loader1,
             $loader2,
-        ));
+        ]);
 
         $this->assertTrue($chain->loadClassMetadata($metadata));
     }
@@ -75,10 +75,10 @@ class LoaderChainTest extends TestCase
             ->method('loadClassMetadata')
             ->will($this->returnValue(false));
 
-        $chain = new LoaderChain(array(
+        $chain = new LoaderChain([
             $loader1,
             $loader2,
-        ));
+        ]);
 
         $this->assertFalse($chain->loadClassMetadata($metadata));
     }
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
index affdaf3c37..53c77ec338 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/XmlFileLoaderTest.php
@@ -53,26 +53,26 @@ class XmlFileLoaderTest extends TestCase
         $loader->loadClassMetadata($metadata);
 
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
-        $expected->setGroupSequence(array('Foo', 'Entity'));
+        $expected->setGroupSequence(['Foo', 'Entity']);
         $expected->addConstraint(new ConstraintA());
         $expected->addConstraint(new ConstraintB());
         $expected->addConstraint(new Callback('validateMe'));
         $expected->addConstraint(new Callback('validateMeStatic'));
-        $expected->addConstraint(new Callback(array('Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback')));
+        $expected->addConstraint(new Callback(['Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback']));
         $expected->addConstraint(new Traverse(false));
         $expected->addPropertyConstraint('firstName', new NotNull());
-        $expected->addPropertyConstraint('firstName', new Range(array('min' => 3)));
-        $expected->addPropertyConstraint('firstName', new Choice(array('A', 'B')));
-        $expected->addPropertyConstraint('firstName', new All(array(new NotNull(), new Range(array('min' => 3)))));
-        $expected->addPropertyConstraint('firstName', new All(array('constraints' => array(new NotNull(), new Range(array('min' => 3))))));
-        $expected->addPropertyConstraint('firstName', new Collection(array('fields' => array(
-            'foo' => array(new NotNull(), new Range(array('min' => 3))),
-            'bar' => array(new Range(array('min' => 5))),
-        ))));
-        $expected->addPropertyConstraint('firstName', new Choice(array(
+        $expected->addPropertyConstraint('firstName', new Range(['min' => 3]));
+        $expected->addPropertyConstraint('firstName', new Choice(['A', 'B']));
+        $expected->addPropertyConstraint('firstName', new All([new NotNull(), new Range(['min' => 3])]));
+        $expected->addPropertyConstraint('firstName', new All(['constraints' => [new NotNull(), new Range(['min' => 3])]]));
+        $expected->addPropertyConstraint('firstName', new Collection(['fields' => [
+            'foo' => [new NotNull(), new Range(['min' => 3])],
+            'bar' => [new Range(['min' => 5])],
+        ]]));
+        $expected->addPropertyConstraint('firstName', new Choice([
             'message' => 'Must be one of %choices%',
-            'choices' => array('A', 'B'),
-        )));
+            'choices' => ['A', 'B'],
+        ]));
         $expected->addGetterConstraint('lastName', new NotNull());
         $expected->addGetterConstraint('valid', new IsTrue());
         $expected->addGetterConstraint('permissions', new IsTrue());
@@ -88,7 +88,7 @@ class XmlFileLoaderTest extends TestCase
         $loader->loadClassMetadata($metadata);
 
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
-        $expected->addPropertyConstraint('firstName', new Regex(array('pattern' => '/^1/', 'match' => false)));
+        $expected->addPropertyConstraint('firstName', new Regex(['pattern' => '/^1/', 'match' => false]));
 
         $properties = $metadata->getPropertyMetadata('firstName');
         $constraints = $properties[0]->getConstraints();
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php b/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
index 4b2bbcb62f..4f4835658f 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/Loader/YamlFileLoaderTest.php
@@ -35,7 +35,7 @@ class YamlFileLoaderTest extends TestCase
 
         $r = new \ReflectionProperty($loader, 'classes');
         $r->setAccessible(true);
-        $this->assertSame(array(), $r->getValue($loader));
+        $this->assertSame([], $r->getValue($loader));
     }
 
     /**
@@ -52,10 +52,10 @@ class YamlFileLoaderTest extends TestCase
 
     public function provideInvalidYamlFiles()
     {
-        return array(
-            array('nonvalid-mapping.yml'),
-            array('bad-format.yml'),
-        );
+        return [
+            ['nonvalid-mapping.yml'],
+            ['bad-format.yml'],
+        ];
     }
 
     /**
@@ -98,25 +98,25 @@ class YamlFileLoaderTest extends TestCase
         $loader->loadClassMetadata($metadata);
 
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
-        $expected->setGroupSequence(array('Foo', 'Entity'));
+        $expected->setGroupSequence(['Foo', 'Entity']);
         $expected->addConstraint(new ConstraintA());
         $expected->addConstraint(new ConstraintB());
         $expected->addConstraint(new Callback('validateMe'));
         $expected->addConstraint(new Callback('validateMeStatic'));
-        $expected->addConstraint(new Callback(array('Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback')));
+        $expected->addConstraint(new Callback(['Symfony\Component\Validator\Tests\Fixtures\CallbackClass', 'callback']));
         $expected->addPropertyConstraint('firstName', new NotNull());
-        $expected->addPropertyConstraint('firstName', new Range(array('min' => 3)));
-        $expected->addPropertyConstraint('firstName', new Choice(array('A', 'B')));
-        $expected->addPropertyConstraint('firstName', new All(array(new NotNull(), new Range(array('min' => 3)))));
-        $expected->addPropertyConstraint('firstName', new All(array('constraints' => array(new NotNull(), new Range(array('min' => 3))))));
-        $expected->addPropertyConstraint('firstName', new Collection(array('fields' => array(
-            'foo' => array(new NotNull(), new Range(array('min' => 3))),
-            'bar' => array(new Range(array('min' => 5))),
-        ))));
-        $expected->addPropertyConstraint('firstName', new Choice(array(
+        $expected->addPropertyConstraint('firstName', new Range(['min' => 3]));
+        $expected->addPropertyConstraint('firstName', new Choice(['A', 'B']));
+        $expected->addPropertyConstraint('firstName', new All([new NotNull(), new Range(['min' => 3])]));
+        $expected->addPropertyConstraint('firstName', new All(['constraints' => [new NotNull(), new Range(['min' => 3])]]));
+        $expected->addPropertyConstraint('firstName', new Collection(['fields' => [
+            'foo' => [new NotNull(), new Range(['min' => 3])],
+            'bar' => [new Range(['min' => 5])],
+        ]]));
+        $expected->addPropertyConstraint('firstName', new Choice([
             'message' => 'Must be one of %choices%',
-            'choices' => array('A', 'B'),
-        )));
+            'choices' => ['A', 'B'],
+        ]));
         $expected->addGetterConstraint('lastName', new NotNull());
         $expected->addGetterConstraint('valid', new IsTrue());
         $expected->addGetterConstraint('permissions', new IsTrue());
@@ -132,7 +132,7 @@ class YamlFileLoaderTest extends TestCase
         $loader->loadClassMetadata($metadata);
 
         $expected = new ClassMetadata('Symfony\Component\Validator\Tests\Fixtures\Entity');
-        $expected->addPropertyConstraint('firstName', new Range(array('max' => PHP_INT_MAX)));
+        $expected->addPropertyConstraint('firstName', new Range(['max' => PHP_INT_MAX]));
 
         $this->assertEquals($expected, $metadata);
     }
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
index d7736de340..651ba95642 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
@@ -45,8 +45,8 @@ class MemberMetadataTest extends TestCase
 
     public function testSerialize()
     {
-        $this->metadata->addConstraint(new ConstraintA(array('property1' => 'A')));
-        $this->metadata->addConstraint(new ConstraintB(array('groups' => 'TestGroup')));
+        $this->metadata->addConstraint(new ConstraintA(['property1' => 'A']));
+        $this->metadata->addConstraint(new ConstraintB(['groups' => 'TestGroup']));
 
         $metadata = unserialize(serialize($this->metadata));
 
@@ -55,7 +55,7 @@ class MemberMetadataTest extends TestCase
 
     public function testSerializeCollectionCascaded()
     {
-        $this->metadata->addConstraint(new Valid(array('traverse' => true)));
+        $this->metadata->addConstraint(new Valid(['traverse' => true]));
 
         $metadata = unserialize(serialize($this->metadata));
 
@@ -64,7 +64,7 @@ class MemberMetadataTest extends TestCase
 
     public function testSerializeCollectionNotCascaded()
     {
-        $this->metadata->addConstraint(new Valid(array('traverse' => false)));
+        $this->metadata->addConstraint(new Valid(['traverse' => false]));
 
         $metadata = unserialize(serialize($this->metadata));
 
diff --git a/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php b/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
index 235e1780d9..f796463bbc 100644
--- a/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
+++ b/src/Symfony/Component/Validator/Tests/Util/PropertyPathTest.php
@@ -26,12 +26,12 @@ class PropertyPathTest extends TestCase
 
     public function provideAppendPaths()
     {
-        return array(
-            array('foo', '', 'foo', 'It returns the basePath if subPath is empty'),
-            array('', 'bar', 'bar', 'It returns the subPath if basePath is empty'),
-            array('foo', 'bar', 'foo.bar', 'It append the subPath to the basePath'),
-            array('foo', '[bar]', 'foo[bar]', 'It does not include the dot separator if subPath uses the array notation'),
-            array('0', 'bar', '0.bar', 'Leading zeros are kept.'),
-        );
+        return [
+            ['foo', '', 'foo', 'It returns the basePath if subPath is empty'],
+            ['', 'bar', 'bar', 'It returns the subPath if basePath is empty'],
+            ['foo', 'bar', 'foo.bar', 'It append the subPath to the basePath'],
+            ['foo', '[bar]', 'foo[bar]', 'It does not include the dot separator if subPath uses the array notation'],
+            ['0', 'bar', '0.bar', 'Leading zeros are kept.'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Validator/AbstractTest.php b/src/Symfony/Component/Validator/Tests/Validator/AbstractTest.php
index 6587dae139..1df64de4d9 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/AbstractTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/AbstractTest.php
@@ -41,7 +41,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     /**
      * @return ValidatorInterface
      */
-    abstract protected function createValidator(MetadataFactoryInterface $metadataFactory, array $objectInitializers = array());
+    abstract protected function createValidator(MetadataFactoryInterface $metadataFactory, array $objectInitializers = []);
 
     protected function setUp()
     {
@@ -74,7 +74,7 @@ abstract class AbstractTest extends AbstractValidatorTest
 
     public function testValidateWithEmptyArrayAsConstraint()
     {
-        $violations = $this->validator->validate('value', array());
+        $violations = $this->validator->validate('value', []);
         $this->assertCount(0, $violations);
     }
 
@@ -89,20 +89,20 @@ abstract class AbstractTest extends AbstractValidatorTest
             $context->addViolation('Message 2');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => function () {},
             'groups' => 'Group 1',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group 2',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 3',
-        )));
+        ]));
 
-        $sequence = new GroupSequence(array('Group 1', 'Group 2', 'Group 3'));
+        $sequence = new GroupSequence(['Group 1', 'Group 2', 'Group 3']);
         $violations = $this->validator->validate($entity, new Valid(), $sequence);
 
         /* @var ConstraintViolationInterface[] $violations */
@@ -123,16 +123,16 @@ abstract class AbstractTest extends AbstractValidatorTest
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group 1',
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 2',
-        )));
+        ]));
 
-        $sequence = new GroupSequence(array('Group 1', 'Entity'));
+        $sequence = new GroupSequence(['Group 1', 'Entity']);
         $violations = $this->validator->validate($entity, new Valid(), $sequence);
 
         /* @var ConstraintViolationInterface[] $violations */
@@ -157,7 +157,7 @@ abstract class AbstractTest extends AbstractValidatorTest
             $this->assertCount(1, $violations);
             $this->assertSame('Message value', $violations[0]->getMessage());
             $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-            $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+            $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
             $this->assertSame('', $violations[0]->getPropertyPath());
 
             // The root is different as we're in a new context
@@ -180,17 +180,17 @@ abstract class AbstractTest extends AbstractValidatorTest
             $this->assertSame($entity->reference, $context->getValue());
             $this->assertSame($entity->reference, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validator->validate($entity, new Valid(), 'Group');
 
@@ -236,17 +236,17 @@ abstract class AbstractTest extends AbstractValidatorTest
             $this->assertSame($entity->reference, $context->getValue());
             $this->assertSame($entity->reference, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validator->validate($entity, new Valid(), 'Group');
 
@@ -254,7 +254,7 @@ abstract class AbstractTest extends AbstractValidatorTest
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('subpath', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference, $violations[0]->getInvalidValue());
@@ -278,7 +278,7 @@ abstract class AbstractTest extends AbstractValidatorTest
                 ->getValidator()
                 ->inContext($context)
                 ->atPath('subpath')
-                ->validate(array('key' => $value->reference))
+                ->validate(['key' => $value->reference])
             ;
 
             // context changes shouldn't leak out of the validate() call
@@ -299,17 +299,17 @@ abstract class AbstractTest extends AbstractValidatorTest
             $this->assertSame($entity->reference, $context->getValue());
             $this->assertSame($entity->reference, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validator->validate($entity, new Valid(), 'Group');
 
@@ -317,7 +317,7 @@ abstract class AbstractTest extends AbstractValidatorTest
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('subpath[key]', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference, $violations[0]->getInvalidValue());
@@ -328,7 +328,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testTraverseTraversableByDefault()
     {
         $entity = new Entity();
-        $traversable = new \ArrayIterator(array('key' => $entity));
+        $traversable = new \ArrayIterator(['key' => $entity]);
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, $traversable) {
             $this->assertSame($this::ENTITY_CLASS, $context->getClassName());
@@ -340,14 +340,14 @@ abstract class AbstractTest extends AbstractValidatorTest
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadataFactory->addMetadata(new ClassMetadata('ArrayIterator'));
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($traversable, new Valid(), 'Group');
 
@@ -355,7 +355,7 @@ abstract class AbstractTest extends AbstractValidatorTest
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('[key]', $violations[0]->getPropertyPath());
         $this->assertSame($traversable, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -366,7 +366,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testTraversalEnabledOnClass()
     {
         $entity = new Entity();
-        $traversable = new \ArrayIterator(array('key' => $entity));
+        $traversable = new \ArrayIterator(['key' => $entity]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
             $context->addViolation('Message');
@@ -376,10 +376,10 @@ abstract class AbstractTest extends AbstractValidatorTest
         $traversableMetadata->addConstraint(new Traverse(true));
 
         $this->metadataFactory->addMetadata($traversableMetadata);
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($traversable, new Valid(), 'Group');
 
@@ -390,7 +390,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testTraversalDisabledOnClass()
     {
         $entity = new Entity();
-        $traversable = new \ArrayIterator(array('key' => $entity));
+        $traversable = new \ArrayIterator(['key' => $entity]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
             $this->fail('Should not be called');
@@ -400,10 +400,10 @@ abstract class AbstractTest extends AbstractValidatorTest
         $traversableMetadata->addConstraint(new Traverse(false));
 
         $this->metadataFactory->addMetadata($traversableMetadata);
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($traversable, new Valid(), 'Group');
 
@@ -426,7 +426,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testReferenceTraversalDisabledOnClass()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array('key' => new Reference()));
+        $entity->reference = new \ArrayIterator(['key' => new Reference()]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
             $this->fail('Should not be called');
@@ -436,10 +436,10 @@ abstract class AbstractTest extends AbstractValidatorTest
         $traversableMetadata->addConstraint(new Traverse(false));
 
         $this->metadataFactory->addMetadata($traversableMetadata);
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
         $this->metadata->addPropertyConstraint('reference', new Valid());
 
         $violations = $this->validate($entity, new Valid(), 'Group');
@@ -451,7 +451,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testReferenceTraversalEnabledOnReferenceDisabledOnClass()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array('key' => new Reference()));
+        $entity->reference = new \ArrayIterator(['key' => new Reference()]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
             $this->fail('Should not be called');
@@ -461,13 +461,13 @@ abstract class AbstractTest extends AbstractValidatorTest
         $traversableMetadata->addConstraint(new Traverse(false));
 
         $this->metadataFactory->addMetadata($traversableMetadata);
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        ]));
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => true,
-        )));
+        ]));
 
         $violations = $this->validate($entity, new Valid(), 'Group');
 
@@ -478,7 +478,7 @@ abstract class AbstractTest extends AbstractValidatorTest
     public function testReferenceTraversalDisabledOnReferenceEnabledOnClass()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array('key' => new Reference()));
+        $entity->reference = new \ArrayIterator(['key' => new Reference()]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
             $this->fail('Should not be called');
@@ -488,13 +488,13 @@ abstract class AbstractTest extends AbstractValidatorTest
         $traversableMetadata->addConstraint(new Traverse(true));
 
         $this->metadataFactory->addMetadata($traversableMetadata);
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        ]));
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => false,
-        )));
+        ]));
 
         $violations = $this->validate($entity, new Valid(), 'Group');
 
@@ -523,7 +523,7 @@ abstract class AbstractTest extends AbstractValidatorTest
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Invalid value', $violations[0]->getInvalidValue());
@@ -539,12 +539,12 @@ abstract class AbstractTest extends AbstractValidatorTest
             $context->addViolation('Message');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
-            'groups' => array('Group 1', 'Group 2'),
-        )));
+            'groups' => ['Group 1', 'Group 2'],
+        ]));
 
-        $violations = $this->validator->validate($entity, new Valid(), array('Group 1', 'Group 2'));
+        $violations = $this->validator->validate($entity, new Valid(), ['Group 1', 'Group 2']);
 
         /* @var ConstraintViolationInterface[] $violations */
         $this->assertCount(1, $violations);
@@ -558,12 +558,12 @@ abstract class AbstractTest extends AbstractValidatorTest
             $context->addViolation('Message');
         };
 
-        $this->metadata->addPropertyConstraint('firstName', new Callback(array(
+        $this->metadata->addPropertyConstraint('firstName', new Callback([
             'callback' => $callback,
-            'groups' => array('Group 1', 'Group 2'),
-        )));
+            'groups' => ['Group 1', 'Group 2'],
+        ]));
 
-        $violations = $this->validator->validate($entity, new Valid(), array('Group 1', 'Group 2'));
+        $violations = $this->validator->validate($entity, new Valid(), ['Group 1', 'Group 2']);
 
         /* @var ConstraintViolationInterface[] $violations */
         $this->assertCount(1, $violations);
@@ -582,7 +582,7 @@ abstract class AbstractTest extends AbstractValidatorTest
         $called = false;
         $entity = new Entity();
         $entity->firstName = 'Bernhard';
-        $entity->data = array('firstName' => 'Bernhard');
+        $entity->data = ['firstName' => 'Bernhard'];
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, &$called) {
             $called = true;
@@ -591,7 +591,7 @@ abstract class AbstractTest extends AbstractValidatorTest
 
         $this->metadata->addConstraint(new Callback($callback));
         $this->metadata->addPropertyConstraint('firstName', new Callback($callback));
-        $this->metadata->addPropertyConstraint('data', new Collection(array('firstName' => new Expression('value == this.firstName'))));
+        $this->metadata->addPropertyConstraint('data', new Collection(['firstName' => new Expression('value == this.firstName')]));
 
         $this->validator->validate($entity);
 
@@ -618,10 +618,10 @@ abstract class AbstractTest extends AbstractValidatorTest
             ->method('initialize')
             ->with($entity);
 
-        $this->validator = $this->createValidator($this->metadataFactory, array(
+        $this->validator = $this->createValidator($this->metadataFactory, [
             $initializer1,
             $initializer2,
-        ));
+        ]);
 
         // prepare constraint which
         // * checks that "initialized" is set to true
@@ -656,15 +656,15 @@ abstract class AbstractTest extends AbstractValidatorTest
 
     public function testCollectionConstraitViolationHasCorrectContext()
     {
-        $data = array(
+        $data = [
             'foo' => 'fooValue',
-        );
+        ];
 
         // Missing field must not be the first in the collection validation
-        $constraint = new Collection(array(
+        $constraint = new Collection([
             'foo' => new NotNull(),
             'bar' => new NotNull(),
-        ));
+        ]);
 
         $violations = $this->validate($data, $constraint);
 
@@ -680,11 +680,11 @@ abstract class AbstractTest extends AbstractValidatorTest
         $reference->value = '';
         $entity->childA = $reference;
 
-        $this->metadata->addPropertyConstraint('firstName', new NotBlank(array('groups' => 'group1')));
-        $this->metadata->addPropertyConstraint('childA', new Valid(array('groups' => 'group1')));
+        $this->metadata->addPropertyConstraint('firstName', new NotBlank(['groups' => 'group1']));
+        $this->metadata->addPropertyConstraint('childA', new Valid(['groups' => 'group1']));
         $this->referenceMetadata->addPropertyConstraint('value', new NotBlank());
 
-        $violations = $this->validator->validate($entity, null, array());
+        $violations = $this->validator->validate($entity, null, []);
 
         $this->assertCount(0, $violations);
     }
@@ -697,11 +697,11 @@ abstract class AbstractTest extends AbstractValidatorTest
         $reference->value = '';
         $entity->childA = $reference;
 
-        $this->metadata->addPropertyConstraint('firstName', new NotBlank(array('groups' => 'group1')));
-        $this->metadata->addPropertyConstraint('childA', new Valid(array('groups' => 'group1')));
-        $this->referenceMetadata->addPropertyConstraint('value', new NotBlank(array('groups' => 'group1')));
+        $this->metadata->addPropertyConstraint('firstName', new NotBlank(['groups' => 'group1']));
+        $this->metadata->addPropertyConstraint('childA', new Valid(['groups' => 'group1']));
+        $this->referenceMetadata->addPropertyConstraint('value', new NotBlank(['groups' => 'group1']));
 
-        $violations = $this->validator->validate($entity, null, array('Default', 'group1'));
+        $violations = $this->validator->validate($entity, null, ['Default', 'group1']);
 
         $this->assertCount(2, $violations);
     }
diff --git a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
index 7d303ce8a5..ecfc10feb6 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/AbstractValidatorTest.php
@@ -80,13 +80,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bernhard', $context->getValue());
             $this->assertSame('Bernhard', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $constraint = new Callback(array(
+        $constraint = new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        ));
+        ]);
 
         $violations = $this->validate('Bernhard', $constraint, 'Group');
 
@@ -94,7 +94,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('', $violations[0]->getPropertyPath());
         $this->assertSame('Bernhard', $violations[0]->getRoot());
         $this->assertSame('Bernhard', $violations[0]->getInvalidValue());
@@ -116,13 +116,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -130,7 +130,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -155,13 +155,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bernhard', $context->getValue());
             $this->assertSame('Bernhard', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addPropertyConstraint('firstName', new Callback(array(
+        $this->metadata->addPropertyConstraint('firstName', new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -169,7 +169,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('firstName', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Bernhard', $violations[0]->getInvalidValue());
@@ -194,13 +194,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Schussek', $context->getValue());
             $this->assertSame('Schussek', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addGetterConstraint('lastName', new Callback(array(
+        $this->metadata->addGetterConstraint('lastName', new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -208,7 +208,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('lastName', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Schussek', $violations[0]->getInvalidValue());
@@ -219,7 +219,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testArray()
     {
         $entity = new Entity();
-        $array = array('key' => $entity);
+        $array = ['key' => $entity];
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, $array) {
             $this->assertSame($this::ENTITY_CLASS, $context->getClassName());
@@ -231,13 +231,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($array, null, 'Group');
 
@@ -245,7 +245,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('[key]', $violations[0]->getPropertyPath());
         $this->assertSame($array, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -256,7 +256,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testRecursiveArray()
     {
         $entity = new Entity();
-        $array = array(2 => array('key' => $entity));
+        $array = [2 => ['key' => $entity]];
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, $array) {
             $this->assertSame($this::ENTITY_CLASS, $context->getClassName());
@@ -268,13 +268,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($array, null, 'Group');
 
@@ -282,7 +282,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('[2][key]', $violations[0]->getPropertyPath());
         $this->assertSame($array, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -293,7 +293,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testTraversable()
     {
         $entity = new Entity();
-        $traversable = new \ArrayIterator(array('key' => $entity));
+        $traversable = new \ArrayIterator(['key' => $entity]);
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, $traversable) {
             $this->assertSame($this::ENTITY_CLASS, $context->getClassName());
@@ -305,13 +305,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($traversable, null, 'Group');
 
@@ -319,7 +319,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('[key]', $violations[0]->getPropertyPath());
         $this->assertSame($traversable, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -330,9 +330,9 @@ abstract class AbstractValidatorTest extends TestCase
     public function testRecursiveTraversable()
     {
         $entity = new Entity();
-        $traversable = new \ArrayIterator(array(
-            2 => new \ArrayIterator(array('key' => $entity)),
-        ));
+        $traversable = new \ArrayIterator([
+            2 => new \ArrayIterator(['key' => $entity]),
+        ]);
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity, $traversable) {
             $this->assertSame($this::ENTITY_CLASS, $context->getClassName());
@@ -344,13 +344,13 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity, $context->getValue());
             $this->assertSame($entity, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($traversable, null, 'Group');
 
@@ -358,7 +358,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('[2][key]', $violations[0]->getPropertyPath());
         $this->assertSame($traversable, $violations[0]->getRoot());
         $this->assertSame($entity, $violations[0]->getInvalidValue());
@@ -381,14 +381,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity->reference, $context->getValue());
             $this->assertSame($entity->reference, $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -396,7 +396,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference, $violations[0]->getInvalidValue());
@@ -422,14 +422,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Foobar', $context->getValue());
             $this->assertSame('Foobar', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addPropertyConstraint('value', new Callback(array(
+        $this->referenceMetadata->addPropertyConstraint('value', new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -437,7 +437,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference.value', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Foobar', $violations[0]->getInvalidValue());
@@ -463,14 +463,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bamboo', $context->getValue());
             $this->assertSame('Bamboo', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addPropertyConstraint('privateValue', new Callback(array(
+        $this->referenceMetadata->addPropertyConstraint('privateValue', new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -478,7 +478,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference.privateValue', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Bamboo', $violations[0]->getInvalidValue());
@@ -515,7 +515,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testArrayReference()
     {
         $entity = new Entity();
-        $entity->reference = array('key' => new Reference());
+        $entity->reference = ['key' => new Reference()];
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity) {
             $this->assertSame($this::REFERENCE_CLASS, $context->getClassName());
@@ -527,14 +527,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity->reference['key'], $context->getValue());
             $this->assertSame($entity->reference['key'], $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -542,7 +542,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference[key]', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference['key'], $violations[0]->getInvalidValue());
@@ -554,7 +554,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testRecursiveArrayReference()
     {
         $entity = new Entity();
-        $entity->reference = array(2 => array('key' => new Reference()));
+        $entity->reference = [2 => ['key' => new Reference()]];
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity) {
             $this->assertSame($this::REFERENCE_CLASS, $context->getClassName());
@@ -566,14 +566,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity->reference[2]['key'], $context->getValue());
             $this->assertSame($entity->reference[2]['key'], $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -581,7 +581,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference[2][key]', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference[2]['key'], $violations[0]->getInvalidValue());
@@ -592,15 +592,15 @@ abstract class AbstractValidatorTest extends TestCase
     public function testArrayTraversalCannotBeDisabled()
     {
         $entity = new Entity();
-        $entity->reference = array('key' => new Reference());
+        $entity->reference = ['key' => new Reference()];
 
         $callback = function ($value, ExecutionContextInterface $context) {
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => false,
-        )));
+        ]));
         $this->referenceMetadata->addConstraint(new Callback($callback));
 
         $violations = $this->validate($entity);
@@ -612,15 +612,15 @@ abstract class AbstractValidatorTest extends TestCase
     public function testRecursiveArrayTraversalCannotBeDisabled()
     {
         $entity = new Entity();
-        $entity->reference = array(2 => array('key' => new Reference()));
+        $entity->reference = [2 => ['key' => new Reference()]];
 
         $callback = function ($value, ExecutionContextInterface $context) {
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => false,
-        )));
+        ]));
         $this->referenceMetadata->addConstraint(new Callback($callback));
 
         $violations = $this->validate($entity);
@@ -632,7 +632,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testIgnoreScalarsDuringArrayTraversal()
     {
         $entity = new Entity();
-        $entity->reference = array('string', 1234);
+        $entity->reference = ['string', 1234];
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
 
@@ -645,7 +645,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testIgnoreNullDuringArrayTraversal()
     {
         $entity = new Entity();
-        $entity->reference = array(null);
+        $entity->reference = [null];
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
 
@@ -658,7 +658,7 @@ abstract class AbstractValidatorTest extends TestCase
     public function testTraversableReference()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array('key' => new Reference()));
+        $entity->reference = new \ArrayIterator(['key' => new Reference()]);
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity) {
             $this->assertSame($this::REFERENCE_CLASS, $context->getClassName());
@@ -670,14 +670,14 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity->reference['key'], $context->getValue());
             $this->assertSame($entity->reference['key'], $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -685,7 +685,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference[key]', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference['key'], $violations[0]->getInvalidValue());
@@ -696,16 +696,16 @@ abstract class AbstractValidatorTest extends TestCase
     public function testDisableTraversableTraversal()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array('key' => new Reference()));
+        $entity->reference = new \ArrayIterator(['key' => new Reference()]);
 
         $callback = function ($value, ExecutionContextInterface $context) {
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $this->metadataFactory->addMetadata(new ClassMetadata('ArrayIterator'));
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => false,
-        )));
+        ]));
         $this->referenceMetadata->addConstraint(new Callback($callback));
 
         $violations = $this->validate($entity);
@@ -722,9 +722,9 @@ abstract class AbstractValidatorTest extends TestCase
         $entity = new Entity();
         $entity->reference = new \ArrayIterator();
 
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => false,
-        )));
+        ]));
 
         $this->validate($entity);
     }
@@ -732,9 +732,9 @@ abstract class AbstractValidatorTest extends TestCase
     public function testEnableRecursiveTraversableTraversal()
     {
         $entity = new Entity();
-        $entity->reference = new \ArrayIterator(array(
-            2 => new \ArrayIterator(array('key' => new Reference())),
-        ));
+        $entity->reference = new \ArrayIterator([
+            2 => new \ArrayIterator(['key' => new Reference()]),
+        ]);
 
         $callback = function ($value, ExecutionContextInterface $context) use ($entity) {
             $this->assertSame($this::REFERENCE_CLASS, $context->getClassName());
@@ -746,16 +746,16 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame($entity->reference[2]['key'], $context->getValue());
             $this->assertSame($entity->reference[2]['key'], $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
-        $this->metadata->addPropertyConstraint('reference', new Valid(array(
+        $this->metadata->addPropertyConstraint('reference', new Valid([
             'traverse' => true,
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group');
 
@@ -763,7 +763,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('reference[2][key]', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame($entity->reference[2]['key'], $violations[0]->getInvalidValue());
@@ -789,21 +789,21 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bernhard', $context->getValue());
             $this->assertSame('Bernhard', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $callback2 = function ($value, ExecutionContextInterface $context) {
             $context->addViolation('Other violation');
         };
 
-        $this->metadata->addPropertyConstraint('firstName', new Callback(array(
+        $this->metadata->addPropertyConstraint('firstName', new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->metadata->addPropertyConstraint('lastName', new Callback(array(
+        ]));
+        $this->metadata->addPropertyConstraint('lastName', new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validateProperty($entity, 'firstName', 'Group');
 
@@ -811,7 +811,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('firstName', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Bernhard', $violations[0]->getInvalidValue());
@@ -847,21 +847,21 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bernhard', $context->getValue());
             $this->assertSame('Bernhard', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $callback2 = function ($value, ExecutionContextInterface $context) {
             $context->addViolation('Other violation');
         };
 
-        $this->metadata->addPropertyConstraint('firstName', new Callback(array(
+        $this->metadata->addPropertyConstraint('firstName', new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->metadata->addPropertyConstraint('lastName', new Callback(array(
+        ]));
+        $this->metadata->addPropertyConstraint('lastName', new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validatePropertyValue(
             $entity,
@@ -874,7 +874,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('firstName', $violations[0]->getPropertyPath());
         $this->assertSame($entity, $violations[0]->getRoot());
         $this->assertSame('Bernhard', $violations[0]->getInvalidValue());
@@ -896,21 +896,21 @@ abstract class AbstractValidatorTest extends TestCase
             $this->assertSame('Bernhard', $context->getValue());
             $this->assertSame('Bernhard', $value);
 
-            $context->addViolation('Message %param%', array('%param%' => 'value'));
+            $context->addViolation('Message %param%', ['%param%' => 'value']);
         };
 
         $callback2 = function ($value, ExecutionContextInterface $context) {
             $context->addViolation('Other violation');
         };
 
-        $this->metadata->addPropertyConstraint('firstName', new Callback(array(
+        $this->metadata->addPropertyConstraint('firstName', new Callback([
             'callback' => $callback1,
             'groups' => 'Group',
-        )));
-        $this->metadata->addPropertyConstraint('lastName', new Callback(array(
+        ]));
+        $this->metadata->addPropertyConstraint('lastName', new Callback([
             'callback' => $callback2,
             'groups' => 'Group',
-        )));
+        ]));
 
         $violations = $this->validatePropertyValue(
             self::ENTITY_CLASS,
@@ -923,7 +923,7 @@ abstract class AbstractValidatorTest extends TestCase
         $this->assertCount(1, $violations);
         $this->assertSame('Message value', $violations[0]->getMessage());
         $this->assertSame('Message %param%', $violations[0]->getMessageTemplate());
-        $this->assertSame(array('%param%' => 'value'), $violations[0]->getParameters());
+        $this->assertSame(['%param%' => 'value'], $violations[0]->getParameters());
         $this->assertSame('', $violations[0]->getPropertyPath());
         $this->assertSame('Bernhard', $violations[0]->getRoot());
         $this->assertSame('Bernhard', $violations[0]->getInvalidValue());
@@ -990,14 +990,14 @@ abstract class AbstractValidatorTest extends TestCase
             $context->addViolation('Message');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group 1',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group 2',
-        )));
+        ]));
 
         $violations = $this->validate($entity, null, 'Group 2');
 
@@ -1013,16 +1013,16 @@ abstract class AbstractValidatorTest extends TestCase
             $context->addViolation('Message');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group 1',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback,
             'groups' => 'Group 2',
-        )));
+        ]));
 
-        $violations = $this->validate($entity, null, array('Group 1', 'Group 2'));
+        $violations = $this->validate($entity, null, ['Group 1', 'Group 2']);
 
         /* @var ConstraintViolationInterface[] $violations */
         $this->assertCount(2, $violations);
@@ -1039,20 +1039,20 @@ abstract class AbstractValidatorTest extends TestCase
             $context->addViolation('Violation in Group 3');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => function () {},
             'groups' => 'Group 1',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group 2',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 3',
-        )));
+        ]));
 
-        $sequence = new GroupSequence(array('Group 1', 'Group 2', 'Group 3', 'Entity'));
+        $sequence = new GroupSequence(['Group 1', 'Group 2', 'Group 3', 'Entity']);
         $this->metadata->setGroupSequence($sequence);
 
         $violations = $this->validate($entity, null, 'Default');
@@ -1073,20 +1073,20 @@ abstract class AbstractValidatorTest extends TestCase
             $context->addViolation('Violation in Group 3');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => function () {},
             'groups' => 'Group 1',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group 2',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 3',
-        )));
+        ]));
 
-        $sequence = array('Group 1', 'Group 2', 'Group 3', 'Entity');
+        $sequence = ['Group 1', 'Group 2', 'Group 3', 'Entity'];
         $this->metadata->setGroupSequence($sequence);
 
         $violations = $this->validate($entity, null, 'Default');
@@ -1109,16 +1109,16 @@ abstract class AbstractValidatorTest extends TestCase
         };
 
         $this->metadata->addPropertyConstraint('reference', new Valid());
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Default',
-        )));
-        $this->referenceMetadata->addConstraint(new Callback(array(
+        ]));
+        $this->referenceMetadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 1',
-        )));
+        ]));
 
-        $sequence = new GroupSequence(array('Group 1', 'Entity'));
+        $sequence = new GroupSequence(['Group 1', 'Entity']);
         $this->metadata->setGroupSequence($sequence);
 
         $violations = $this->validate($entity, null, 'Default');
@@ -1139,16 +1139,16 @@ abstract class AbstractValidatorTest extends TestCase
             $context->addViolation('Violation in group sequence');
         };
 
-        $this->metadata->addConstraint(new Callback(array(
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Other Group',
-        )));
-        $this->metadata->addConstraint(new Callback(array(
+        ]));
+        $this->metadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 1',
-        )));
+        ]));
 
-        $sequence = new GroupSequence(array('Group 1', 'Entity'));
+        $sequence = new GroupSequence(['Group 1', 'Entity']);
         $this->metadata->setGroupSequence($sequence);
 
         $violations = $this->validate($entity, null, 'Other Group');
@@ -1173,18 +1173,18 @@ abstract class AbstractValidatorTest extends TestCase
         };
 
         $metadata = new ClassMetadata(\get_class($entity));
-        $metadata->addConstraint(new Callback(array(
+        $metadata->addConstraint(new Callback([
             'callback' => function () {},
             'groups' => 'Group 1',
-        )));
-        $metadata->addConstraint(new Callback(array(
+        ]));
+        $metadata->addConstraint(new Callback([
             'callback' => $callback1,
             'groups' => 'Group 2',
-        )));
-        $metadata->addConstraint(new Callback(array(
+        ]));
+        $metadata->addConstraint(new Callback([
             'callback' => $callback2,
             'groups' => 'Group 3',
-        )));
+        ]));
         $metadata->setGroupSequenceProvider(true);
 
         $this->metadataFactory->addMetadata($metadata);
@@ -1200,33 +1200,33 @@ abstract class AbstractValidatorTest extends TestCase
 
     public function getTestReplaceDefaultGroup()
     {
-        return array(
-            array(
-                'sequence' => new GroupSequence(array('Group 1', 'Group 2', 'Group 3', 'Entity')),
-                'assertViolations' => array(
+        return [
+            [
+                'sequence' => new GroupSequence(['Group 1', 'Group 2', 'Group 3', 'Entity']),
+                'assertViolations' => [
                     'Violation in Group 2',
-                ),
-            ),
-            array(
-                'sequence' => array('Group 1', 'Group 2', 'Group 3', 'Entity'),
-                'assertViolations' => array(
+                ],
+            ],
+            [
+                'sequence' => ['Group 1', 'Group 2', 'Group 3', 'Entity'],
+                'assertViolations' => [
                     'Violation in Group 2',
-                ),
-            ),
-            array(
-                'sequence' => new GroupSequence(array('Group 1', array('Group 2', 'Group 3'), 'Entity')),
-                'assertViolations' => array(
+                ],
+            ],
+            [
+                'sequence' => new GroupSequence(['Group 1', ['Group 2', 'Group 3'], 'Entity']),
+                'assertViolations' => [
                     'Violation in Group 2',
                     'Violation in Group 3',
-                ),
-            ),
-            array(
-                'sequence' => array('Group 1', array('Group 2', 'Group 3'), 'Entity'),
-                'assertViolations' => array(
+                ],
+            ],
+            [
+                'sequence' => ['Group 1', ['Group 2', 'Group 3'], 'Entity'],
+                'assertViolations' => [
                     'Violation in Group 2',
                     'Violation in Group 3',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
index 49ebef0c7c..8109b6b9bf 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/RecursiveValidatorTest.php
@@ -26,7 +26,7 @@ use Symfony\Component\Validator\Validator\RecursiveValidator;
 
 class RecursiveValidatorTest extends AbstractTest
 {
-    protected function createValidator(MetadataFactoryInterface $metadataFactory, array $objectInitializers = array())
+    protected function createValidator(MetadataFactoryInterface $metadataFactory, array $objectInitializers = [])
     {
         $translator = new IdentityTranslator();
         $translator->setLocale('en');
@@ -44,26 +44,26 @@ class RecursiveValidatorTest extends AbstractTest
         $childB = new ChildB();
         $childA->name = false;
         $childB->name = 'fake';
-        $entity->childA = array($childA);
-        $entity->childB = array($childB);
+        $entity->childA = [$childA];
+        $entity->childB = [$childB];
         $validatorContext = $this->getMockBuilder('Symfony\Component\Validator\Validator\ContextualValidatorInterface')->getMock();
         $validatorContext
             ->expects($this->once())
             ->method('validate')
-            ->with($entity, null, array())
+            ->with($entity, null, [])
             ->willReturnSelf();
 
         $validator = $this
             ->getMockBuilder('Symfony\Component\Validator\Validator\RecursiveValidator')
             ->disableOriginalConstructor()
-            ->setMethods(array('startContext'))
+            ->setMethods(['startContext'])
             ->getMock();
         $validator
             ->expects($this->once())
             ->method('startContext')
             ->willReturn($validatorContext);
 
-        $validator->validate($entity, null, array());
+        $validator->validate($entity, null, []);
     }
 
     public function testRelationBetweenChildAAndChildB()
@@ -77,40 +77,40 @@ class RecursiveValidatorTest extends AbstractTest
 
         $childA->name = false;
         $childB->name = 'fake';
-        $entity->childA = array($childA);
-        $entity->childB = array($childB);
+        $entity->childA = [$childA];
+        $entity->childB = [$childB];
 
         $validatorContext = $this->getMockBuilder('Symfony\Component\Validator\Validator\ContextualValidatorInterface')->getMock();
         $validatorContext
             ->expects($this->once())
             ->method('validate')
-            ->with($entity, null, array())
+            ->with($entity, null, [])
             ->willReturnSelf();
 
         $validator = $this
             ->getMockBuilder('Symfony\Component\Validator\Validator\RecursiveValidator')
             ->disableOriginalConstructor()
-            ->setMethods(array('startContext'))
+            ->setMethods(['startContext'])
             ->getMock();
         $validator
             ->expects($this->once())
             ->method('startContext')
             ->willReturn($validatorContext);
 
-        $validator->validate($entity, null, array());
+        $validator->validate($entity, null, []);
     }
 
     public function testCollectionConstraintValidateAllGroupsForNestedConstraints()
     {
-        $this->metadata->addPropertyConstraint('data', new Collection(array('fields' => array(
-            'one' => array(new NotBlank(array('groups' => 'one')), new Length(array('min' => 2, 'groups' => 'two'))),
-            'two' => array(new NotBlank(array('groups' => 'two'))),
-        ))));
+        $this->metadata->addPropertyConstraint('data', new Collection(['fields' => [
+            'one' => [new NotBlank(['groups' => 'one']), new Length(['min' => 2, 'groups' => 'two'])],
+            'two' => [new NotBlank(['groups' => 'two'])],
+        ]]));
 
         $entity = new Entity();
-        $entity->data = array('one' => 't', 'two' => '');
+        $entity->data = ['one' => 't', 'two' => ''];
 
-        $violations = $this->validator->validate($entity, null, array('one', 'two'));
+        $violations = $this->validator->validate($entity, null, ['one', 'two']);
 
         $this->assertCount(2, $violations);
         $this->assertInstanceOf(Length::class, $violations->get(0)->getConstraint());
@@ -119,15 +119,15 @@ class RecursiveValidatorTest extends AbstractTest
 
     public function testAllConstraintValidateAllGroupsForNestedConstraints()
     {
-        $this->metadata->addPropertyConstraint('data', new All(array('constraints' => array(
-            new NotBlank(array('groups' => 'one')),
-            new Length(array('min' => 2, 'groups' => 'two')),
-        ))));
+        $this->metadata->addPropertyConstraint('data', new All(['constraints' => [
+            new NotBlank(['groups' => 'one']),
+            new Length(['min' => 2, 'groups' => 'two']),
+        ]]));
 
         $entity = new Entity();
-        $entity->data = array('one' => 't', 'two' => '');
+        $entity->data = ['one' => 't', 'two' => ''];
 
-        $violations = $this->validator->validate($entity, null, array('one', 'two'));
+        $violations = $this->validator->validate($entity, null, ['one', 'two']);
 
         $this->assertCount(2, $violations);
         $this->assertInstanceOf(NotBlank::class, $violations->get(0)->getConstraint());
diff --git a/src/Symfony/Component/Validator/Tests/Validator/TraceableValidatorTest.php b/src/Symfony/Component/Validator/Tests/Validator/TraceableValidatorTest.php
index b2eef769ec..3d89f4e142 100644
--- a/src/Symfony/Component/Validator/Tests/Validator/TraceableValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Validator/TraceableValidatorTest.php
@@ -27,17 +27,17 @@ class TraceableValidatorTest extends TestCase
     public function testValidate()
     {
         $originalValidator = $this->createMock(ValidatorInterface::class);
-        $violations = new ConstraintViolationList(array(
+        $violations = new ConstraintViolationList([
             $this->createMock(ConstraintViolation::class),
             $this->createMock(ConstraintViolation::class),
-        ));
+        ]);
         $originalValidator->expects($this->exactly(2))->method('validate')->willReturn($violations);
 
         $validator = new TraceableValidator($originalValidator);
 
         $object = new \stdClass();
-        $constraints = array($this->createMock(Constraint::class));
-        $groups = array('Default', 'Create');
+        $constraints = [$this->createMock(Constraint::class)];
+        $groups = ['Default', 'Create'];
 
         $validator->validate($object, $constraints, $groups);
         $line = __LINE__ - 1;
@@ -50,17 +50,17 @@ class TraceableValidatorTest extends TestCase
 
         $this->assertSame(iterator_to_array($violations), $callData['violations']);
 
-        $this->assertSame(array(
+        $this->assertSame([
             'value' => $object,
             'constraints' => $constraints,
             'groups' => $groups,
-        ), $callData['context']);
+        ], $callData['context']);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'name' => 'TraceableValidatorTest.php',
             'file' => __FILE__,
             'line' => $line,
-        ), $callData['caller']);
+        ], $callData['caller']);
 
         $validator->validate($object, $constraints, $groups);
         $collectedData = $validator->getCollectedData();
diff --git a/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php b/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
index 155c4f8210..a76a363547 100644
--- a/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
+++ b/src/Symfony/Component/Validator/Tests/ValidatorBuilderTest.php
@@ -42,7 +42,7 @@ class ValidatorBuilderTest extends TestCase
 
     public function testAddObjectInitializers()
     {
-        $this->assertSame($this->builder, $this->builder->addObjectInitializers(array()));
+        $this->assertSame($this->builder, $this->builder->addObjectInitializers([]));
     }
 
     public function testAddXmlMapping()
@@ -52,7 +52,7 @@ class ValidatorBuilderTest extends TestCase
 
     public function testAddXmlMappings()
     {
-        $this->assertSame($this->builder, $this->builder->addXmlMappings(array()));
+        $this->assertSame($this->builder, $this->builder->addXmlMappings([]));
     }
 
     public function testAddYamlMapping()
@@ -62,7 +62,7 @@ class ValidatorBuilderTest extends TestCase
 
     public function testAddYamlMappings()
     {
-        $this->assertSame($this->builder, $this->builder->addYamlMappings(array()));
+        $this->assertSame($this->builder, $this->builder->addYamlMappings([]));
     }
 
     public function testAddMethodMapping()
@@ -72,7 +72,7 @@ class ValidatorBuilderTest extends TestCase
 
     public function testAddMethodMappings()
     {
-        $this->assertSame($this->builder, $this->builder->addMethodMappings(array()));
+        $this->assertSame($this->builder, $this->builder->addMethodMappings([]));
     }
 
     public function testEnableAnnotationMapping()
diff --git a/src/Symfony/Component/Validator/Util/LegacyTranslatorProxy.php b/src/Symfony/Component/Validator/Util/LegacyTranslatorProxy.php
index f87c1fbbb3..51218e7c57 100644
--- a/src/Symfony/Component/Validator/Util/LegacyTranslatorProxy.php
+++ b/src/Symfony/Component/Validator/Util/LegacyTranslatorProxy.php
@@ -54,7 +54,7 @@ class LegacyTranslatorProxy implements LegacyTranslatorInterface, TranslatorInte
     /**
      * {@inheritdoc}
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         return $this->translator->trans($id, $parameters, $domain, $locale);
     }
@@ -62,8 +62,8 @@ class LegacyTranslatorProxy implements LegacyTranslatorInterface, TranslatorInte
     /**
      * {@inheritdoc}
      */
-    public function transChoice($id, $number, array $parameters = array(), $domain = null, $locale = null)
+    public function transChoice($id, $number, array $parameters = [], $domain = null, $locale = null)
     {
-        return $this->translator->trans($id, array('%count%' => $number) + $parameters, $domain, $locale);
+        return $this->translator->trans($id, ['%count%' => $number] + $parameters, $domain, $locale);
     }
 }
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
index f040d8cb8e..b26f412ecb 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveContextualValidator.php
@@ -58,11 +58,11 @@ class RecursiveContextualValidator implements ContextualValidatorInterface
      *                                                                constraint validators
      * @param ObjectInitializerInterface[]        $objectInitializers The object initializers
      */
-    public function __construct(ExecutionContextInterface $context, MetadataFactoryInterface $metadataFactory, ConstraintValidatorFactoryInterface $validatorFactory, array $objectInitializers = array())
+    public function __construct(ExecutionContextInterface $context, MetadataFactoryInterface $metadataFactory, ConstraintValidatorFactoryInterface $validatorFactory, array $objectInitializers = [])
     {
         $this->context = $context;
         $this->defaultPropertyPath = $context->getPropertyPath();
-        $this->defaultGroups = array($context->getGroup() ?: Constraint::DEFAULT_GROUP);
+        $this->defaultGroups = [$context->getGroup() ?: Constraint::DEFAULT_GROUP];
         $this->metadataFactory = $metadataFactory;
         $this->validatorFactory = $validatorFactory;
         $this->objectInitializers = $objectInitializers;
@@ -102,7 +102,7 @@ class RecursiveContextualValidator implements ContextualValidatorInterface
             // You can pass a single constraint or an array of constraints
             // Make sure to deal with an array in the rest of the code
             if (!\is_array($constraints)) {
-                $constraints = array($constraints);
+                $constraints = [$constraints];
             }
 
             $metadata = new GenericMetadata();
@@ -284,7 +284,7 @@ class RecursiveContextualValidator implements ContextualValidatorInterface
             return $groups;
         }
 
-        return array($groups);
+        return [$groups];
     }
 
     /**
@@ -732,7 +732,7 @@ class RecursiveContextualValidator implements ContextualValidatorInterface
     private function stepThroughGroupSequence($value, $object, $cacheKey, MetadataInterface $metadata = null, $propertyPath, $traversalStrategy, GroupSequence $groupSequence, $cascadedGroup, ExecutionContextInterface $context)
     {
         $violationCount = \count($context->getViolations());
-        $cascadedGroups = $cascadedGroup ? array($cascadedGroup) : null;
+        $cascadedGroups = $cascadedGroup ? [$cascadedGroup] : null;
 
         foreach ($groupSequence->groups as $groupInSequence) {
             $groups = (array) $groupInSequence;
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
index 33c2ec9e47..a258fd4a77 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
@@ -41,7 +41,7 @@ class RecursiveValidator implements ValidatorInterface
      *                                                                constraint validators
      * @param ObjectInitializerInterface[]        $objectInitializers The object initializers
      */
-    public function __construct(ExecutionContextFactoryInterface $contextFactory, MetadataFactoryInterface $metadataFactory, ConstraintValidatorFactoryInterface $validatorFactory, array $objectInitializers = array())
+    public function __construct(ExecutionContextFactoryInterface $contextFactory, MetadataFactoryInterface $metadataFactory, ConstraintValidatorFactoryInterface $validatorFactory, array $objectInitializers = [])
     {
         $this->contextFactory = $contextFactory;
         $this->metadataFactory = $metadataFactory;
diff --git a/src/Symfony/Component/Validator/Validator/TraceableValidator.php b/src/Symfony/Component/Validator/Validator/TraceableValidator.php
index e554b89faf..c08910d8de 100644
--- a/src/Symfony/Component/Validator/Validator/TraceableValidator.php
+++ b/src/Symfony/Component/Validator/Validator/TraceableValidator.php
@@ -22,7 +22,7 @@ use Symfony\Contracts\Service\ResetInterface;
 class TraceableValidator implements ValidatorInterface, ResetInterface
 {
     private $validator;
-    private $collectedData = array();
+    private $collectedData = [];
 
     public function __construct(ValidatorInterface $validator)
     {
@@ -39,7 +39,7 @@ class TraceableValidator implements ValidatorInterface, ResetInterface
 
     public function reset()
     {
-        $this->collectedData = array();
+        $this->collectedData = [];
     }
 
     /**
@@ -93,11 +93,11 @@ class TraceableValidator implements ValidatorInterface, ResetInterface
         $name = str_replace('\\', '/', $file);
         $name = substr($name, strrpos($name, '/') + 1);
 
-        $this->collectedData[] = array(
+        $this->collectedData[] = [
             'caller' => compact('name', 'file', 'line'),
             'context' => compact('value', 'constraints', 'groups'),
             'violations' => iterator_to_array($violations),
-        );
+        ];
 
         return $violations;
     }
diff --git a/src/Symfony/Component/Validator/ValidatorBuilder.php b/src/Symfony/Component/Validator/ValidatorBuilder.php
index 8e4de01267..fb64332712 100644
--- a/src/Symfony/Component/Validator/ValidatorBuilder.php
+++ b/src/Symfony/Component/Validator/ValidatorBuilder.php
@@ -43,11 +43,11 @@ use Symfony\Contracts\Translation\TranslatorTrait;
  */
 class ValidatorBuilder implements ValidatorBuilderInterface
 {
-    private $initializers = array();
-    private $loaders = array();
-    private $xmlMappings = array();
-    private $yamlMappings = array();
-    private $methodMappings = array();
+    private $initializers = [];
+    private $loaders = [];
+    private $xmlMappings = [];
+    private $yamlMappings = [];
+    private $methodMappings = [];
 
     /**
      * @var Reader|null
@@ -288,7 +288,7 @@ class ValidatorBuilder implements ValidatorBuilderInterface
      */
     public function getLoaders()
     {
-        $loaders = array();
+        $loaders = [];
 
         foreach ($this->xmlMappings as $xmlMapping) {
             $loaders[] = new XmlFileLoader($xmlMapping);
diff --git a/src/Symfony/Component/Validator/Violation/ConstraintViolationBuilder.php b/src/Symfony/Component/Validator/Violation/ConstraintViolationBuilder.php
index abca36a536..c5b1d0b83f 100644
--- a/src/Symfony/Component/Validator/Violation/ConstraintViolationBuilder.php
+++ b/src/Symfony/Component/Validator/Violation/ConstraintViolationBuilder.php
@@ -157,7 +157,7 @@ class ConstraintViolationBuilder implements ConstraintViolationBuilderInterface
         } elseif ($this->translator instanceof TranslatorInterface) {
             $translatedMessage = $this->translator->trans(
                 $this->message,
-                array('%count%' => $this->plural) + $this->parameters,
+                ['%count%' => $this->plural] + $this->parameters,
                 $this->translationDomain
             );
         } else {
diff --git a/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php b/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
index 655262f406..19bdc29525 100644
--- a/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/AmqpCaster.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class AmqpCaster
 {
-    private static $flags = array(
+    private static $flags = [
         AMQP_DURABLE => 'AMQP_DURABLE',
         AMQP_PASSIVE => 'AMQP_PASSIVE',
         AMQP_EXCLUSIVE => 'AMQP_EXCLUSIVE',
@@ -35,22 +35,22 @@ class AmqpCaster
         AMQP_MULTIPLE => 'AMQP_MULTIPLE',
         AMQP_NOWAIT => 'AMQP_NOWAIT',
         AMQP_REQUEUE => 'AMQP_REQUEUE',
-    );
+    ];
 
-    private static $exchangeTypes = array(
+    private static $exchangeTypes = [
         AMQP_EX_TYPE_DIRECT => 'AMQP_EX_TYPE_DIRECT',
         AMQP_EX_TYPE_FANOUT => 'AMQP_EX_TYPE_FANOUT',
         AMQP_EX_TYPE_TOPIC => 'AMQP_EX_TYPE_TOPIC',
         AMQP_EX_TYPE_HEADERS => 'AMQP_EX_TYPE_HEADERS',
-    );
+    ];
 
     public static function castConnection(\AMQPConnection $c, array $a, Stub $stub, $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a += array(
+        $a += [
             $prefix.'is_connected' => $c->isConnected(),
-        );
+        ];
 
         // Recent version of the extension already expose private properties
         if (isset($a["\x00AMQPConnection\x00login"])) {
@@ -64,7 +64,7 @@ class AmqpCaster
             $timeout = $c->getTimeout();
         }
 
-        $a += array(
+        $a += [
             $prefix.'is_connected' => $c->isConnected(),
             $prefix.'login' => $c->getLogin(),
             $prefix.'password' => $c->getPassword(),
@@ -72,7 +72,7 @@ class AmqpCaster
             $prefix.'vhost' => $c->getVhost(),
             $prefix.'port' => $c->getPort(),
             $prefix.'read_timeout' => $timeout,
-        );
+        ];
 
         return $a;
     }
@@ -81,21 +81,21 @@ class AmqpCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a += array(
+        $a += [
             $prefix.'is_connected' => $c->isConnected(),
             $prefix.'channel_id' => $c->getChannelId(),
-        );
+        ];
 
         // Recent version of the extension already expose private properties
         if (isset($a["\x00AMQPChannel\x00connection"])) {
             return $a;
         }
 
-        $a += array(
+        $a += [
             $prefix.'connection' => $c->getConnection(),
             $prefix.'prefetch_size' => $c->getPrefetchSize(),
             $prefix.'prefetch_count' => $c->getPrefetchCount(),
-        );
+        ];
 
         return $a;
     }
@@ -104,21 +104,21 @@ class AmqpCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a += array(
+        $a += [
             $prefix.'flags' => self::extractFlags($c->getFlags()),
-        );
+        ];
 
         // Recent version of the extension already expose private properties
         if (isset($a["\x00AMQPQueue\x00name"])) {
             return $a;
         }
 
-        $a += array(
+        $a += [
             $prefix.'connection' => $c->getConnection(),
             $prefix.'channel' => $c->getChannel(),
             $prefix.'name' => $c->getName(),
             $prefix.'arguments' => $c->getArguments(),
-        );
+        ];
 
         return $a;
     }
@@ -127,9 +127,9 @@ class AmqpCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a += array(
+        $a += [
             $prefix.'flags' => self::extractFlags($c->getFlags()),
-        );
+        ];
 
         $type = isset(self::$exchangeTypes[$c->getType()]) ? new ConstStub(self::$exchangeTypes[$c->getType()], $c->getType()) : $c->getType();
 
@@ -140,13 +140,13 @@ class AmqpCaster
             return $a;
         }
 
-        $a += array(
+        $a += [
             $prefix.'connection' => $c->getConnection(),
             $prefix.'channel' => $c->getChannel(),
             $prefix.'name' => $c->getName(),
             $prefix.'type' => $type,
             $prefix.'arguments' => $c->getArguments(),
-        );
+        ];
 
         return $a;
     }
@@ -165,10 +165,10 @@ class AmqpCaster
         }
 
         if (!($filter & Caster::EXCLUDE_VERBOSE)) {
-            $a += array($prefix.'body' => $c->getBody());
+            $a += [$prefix.'body' => $c->getBody()];
         }
 
-        $a += array(
+        $a += [
             $prefix.'delivery_tag' => $c->getDeliveryTag(),
             $prefix.'is_redelivery' => $c->isRedelivery(),
             $prefix.'exchange_name' => $c->getExchangeName(),
@@ -186,14 +186,14 @@ class AmqpCaster
             $prefix.'type' => $c->getType(),
             $prefix.'user_id' => $c->getUserId(),
             $prefix.'app_id' => $c->getAppId(),
-        );
+        ];
 
         return $a;
     }
 
     private static function extractFlags($flags)
     {
-        $flagsArray = array();
+        $flagsArray = [];
 
         foreach (self::$flags as $value => $name) {
             if ($flags & $value) {
@@ -202,7 +202,7 @@ class AmqpCaster
         }
 
         if (!$flagsArray) {
-            $flagsArray = array('AMQP_NOPARAM');
+            $flagsArray = ['AMQP_NOPARAM'];
         }
 
         return new ConstStub(implode('|', $flagsArray), $flags);
diff --git a/src/Symfony/Component/VarDumper/Caster/ArgsStub.php b/src/Symfony/Component/VarDumper/Caster/ArgsStub.php
index 582d15e261..1ca7a86d3a 100644
--- a/src/Symfony/Component/VarDumper/Caster/ArgsStub.php
+++ b/src/Symfony/Component/VarDumper/Caster/ArgsStub.php
@@ -20,13 +20,13 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class ArgsStub extends EnumStub
 {
-    private static $parameters = array();
+    private static $parameters = [];
 
     public function __construct(array $args, string $function, ?string $class)
     {
         list($variadic, $params) = self::getParameters($function, $class);
 
-        $values = array();
+        $values = [];
         foreach ($args as $k => $v) {
             $values[$k] = !is_scalar($v) && !$v instanceof Stub ? new CutStub($v) : $v;
         }
@@ -41,7 +41,7 @@ class ArgsStub extends EnumStub
             $values[] = new EnumStub(array_splice($values, \count($params)), false);
             $params[] = $variadic;
         }
-        if (array('...') === $params) {
+        if (['...'] === $params) {
             $this->dumpKeys = false;
             $this->value = $values[0]->value;
         } else {
@@ -58,11 +58,11 @@ class ArgsStub extends EnumStub
         try {
             $r = null !== $class ? new \ReflectionMethod($class, $function) : new \ReflectionFunction($function);
         } catch (\ReflectionException $e) {
-            return array(null, null);
+            return [null, null];
         }
 
         $variadic = '...';
-        $params = array();
+        $params = [];
         foreach ($r->getParameters() as $v) {
             $k = '$'.$v->name;
             if ($v->isPassedByReference()) {
@@ -75,6 +75,6 @@ class ArgsStub extends EnumStub
             }
         }
 
-        return self::$parameters[$k] = array($variadic, $params);
+        return self::$parameters[$k] = [$variadic, $params];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Caster/Caster.php b/src/Symfony/Component/VarDumper/Caster/Caster.php
index c82ce82725..292bd67eb4 100644
--- a/src/Symfony/Component/VarDumper/Caster/Caster.php
+++ b/src/Symfony/Component/VarDumper/Caster/Caster.php
@@ -51,7 +51,7 @@ class Caster
         if ($hasDebugInfo) {
             $a = $obj->__debugInfo();
         } elseif ($obj instanceof \Closure) {
-            $a = array();
+            $a = [];
         } else {
             $a = (array) $obj;
         }
@@ -60,10 +60,10 @@ class Caster
         }
 
         if ($a) {
-            static $publicProperties = array();
+            static $publicProperties = [];
 
             $i = 0;
-            $prefixedKeys = array();
+            $prefixedKeys = [];
             foreach ($a as $k => $v) {
                 if (isset($k[0]) ? "\0" !== $k[0] : \PHP_VERSION_ID >= 70200) {
                     if (!isset($publicProperties[$class])) {
@@ -104,7 +104,7 @@ class Caster
      *
      * @return array The filtered array
      */
-    public static function filter(array $a, $filter, array $listedProperties = array(), &$count = 0)
+    public static function filter(array $a, $filter, array $listedProperties = [], &$count = 0)
     {
         $count = 0;
 
@@ -114,7 +114,7 @@ class Caster
             if (null === $v) {
                 $type |= self::EXCLUDE_NULL & $filter;
                 $type |= self::EXCLUDE_EMPTY & $filter;
-            } elseif (false === $v || '' === $v || '0' === $v || 0 === $v || 0.0 === $v || array() === $v) {
+            } elseif (false === $v || '' === $v || '0' === $v || 0 === $v || 0.0 === $v || [] === $v) {
                 $type |= self::EXCLUDE_EMPTY & $filter;
             }
             if ((self::EXCLUDE_NOT_IMPORTANT & $filter) && !\in_array($k, $listedProperties, true)) {
diff --git a/src/Symfony/Component/VarDumper/Caster/ClassStub.php b/src/Symfony/Component/VarDumper/Caster/ClassStub.php
index 873b0c0a03..b655ae960e 100644
--- a/src/Symfony/Component/VarDumper/Caster/ClassStub.php
+++ b/src/Symfony/Component/VarDumper/Caster/ClassStub.php
@@ -33,16 +33,16 @@ class ClassStub extends ConstStub
                 if ($callable instanceof \Closure) {
                     $r = new \ReflectionFunction($callable);
                 } elseif (\is_object($callable)) {
-                    $r = array($callable, '__invoke');
+                    $r = [$callable, '__invoke'];
                 } elseif (\is_array($callable)) {
                     $r = $callable;
                 } elseif (false !== $i = strpos($callable, '::')) {
-                    $r = array(substr($callable, 0, $i), substr($callable, 2 + $i));
+                    $r = [substr($callable, 0, $i), substr($callable, 2 + $i)];
                 } else {
                     $r = new \ReflectionFunction($callable);
                 }
             } elseif (0 < $i = strpos($identifier, '::') ?: strpos($identifier, '->')) {
-                $r = array(substr($identifier, 0, $i), substr($identifier, 2 + $i));
+                $r = [substr($identifier, 0, $i), substr($identifier, 2 + $i)];
             } else {
                 $r = new \ReflectionClass($identifier);
             }
@@ -62,7 +62,7 @@ class ClassStub extends ConstStub
             }
 
             if (null !== $callable && $r instanceof \ReflectionFunctionAbstract) {
-                $s = ReflectionCaster::castFunctionAbstract($r, array(), new Stub(), true);
+                $s = ReflectionCaster::castFunctionAbstract($r, [], new Stub(), true);
                 $s = ReflectionCaster::getSignature($s);
 
                 if ('()' === substr($identifier, -2)) {
diff --git a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
index 3a99865370..65151b4f4f 100644
--- a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class DOMCaster
 {
-    private static $errorCodes = array(
+    private static $errorCodes = [
         DOM_PHP_ERR => 'DOM_PHP_ERR',
         DOM_INDEX_SIZE_ERR => 'DOM_INDEX_SIZE_ERR',
         DOMSTRING_SIZE_ERR => 'DOMSTRING_SIZE_ERR',
@@ -38,9 +38,9 @@ class DOMCaster
         DOM_NAMESPACE_ERR => 'DOM_NAMESPACE_ERR',
         DOM_INVALID_ACCESS_ERR => 'DOM_INVALID_ACCESS_ERR',
         DOM_VALIDATION_ERR => 'DOM_VALIDATION_ERR',
-    );
+    ];
 
-    private static $nodeTypes = array(
+    private static $nodeTypes = [
         XML_ELEMENT_NODE => 'XML_ELEMENT_NODE',
         XML_ATTRIBUTE_NODE => 'XML_ATTRIBUTE_NODE',
         XML_TEXT_NODE => 'XML_TEXT_NODE',
@@ -59,7 +59,7 @@ class DOMCaster
         XML_ATTRIBUTE_DECL_NODE => 'XML_ATTRIBUTE_DECL_NODE',
         XML_ENTITY_DECL_NODE => 'XML_ENTITY_DECL_NODE',
         XML_NAMESPACE_DECL_NODE => 'XML_NAMESPACE_DECL_NODE',
-    );
+    ];
 
     public static function castException(\DOMException $e, array $a, Stub $stub, $isNested)
     {
@@ -73,26 +73,26 @@ class DOMCaster
 
     public static function castLength($dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'length' => $dom->length,
-        );
+        ];
 
         return $a;
     }
 
     public static function castImplementation($dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'Core' => '1.0',
             Caster::PREFIX_VIRTUAL.'XML' => '2.0',
-        );
+        ];
 
         return $a;
     }
 
     public static function castNode(\DOMNode $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'nodeName' => $dom->nodeName,
             'nodeValue' => new CutStub($dom->nodeValue),
             'nodeType' => new ConstStub(self::$nodeTypes[$dom->nodeType], $dom->nodeType),
@@ -109,14 +109,14 @@ class DOMCaster
             'localName' => $dom->localName,
             'baseURI' => $dom->baseURI ? new LinkStub($dom->baseURI) : $dom->baseURI,
             'textContent' => new CutStub($dom->textContent),
-        );
+        ];
 
         return $a;
     }
 
     public static function castNameSpaceNode(\DOMNameSpaceNode $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'nodeName' => $dom->nodeName,
             'nodeValue' => new CutStub($dom->nodeValue),
             'nodeType' => new ConstStub(self::$nodeTypes[$dom->nodeType], $dom->nodeType),
@@ -125,14 +125,14 @@ class DOMCaster
             'namespaceURI' => $dom->namespaceURI,
             'ownerDocument' => new CutStub($dom->ownerDocument),
             'parentNode' => new CutStub($dom->parentNode),
-        );
+        ];
 
         return $a;
     }
 
     public static function castDocument(\DOMDocument $dom, array $a, Stub $stub, $isNested, $filter = 0)
     {
-        $a += array(
+        $a += [
             'doctype' => $dom->doctype,
             'implementation' => $dom->implementation,
             'documentElement' => new CutStub($dom->documentElement),
@@ -152,12 +152,12 @@ class DOMCaster
             'preserveWhiteSpace' => $dom->preserveWhiteSpace,
             'recover' => $dom->recover,
             'substituteEntities' => $dom->substituteEntities,
-        );
+        ];
 
         if (!($filter & Caster::EXCLUDE_VERBOSE)) {
             $formatOutput = $dom->formatOutput;
             $dom->formatOutput = true;
-            $a += array(Caster::PREFIX_VIRTUAL.'xml' => $dom->saveXML());
+            $a += [Caster::PREFIX_VIRTUAL.'xml' => $dom->saveXML()];
             $dom->formatOutput = $formatOutput;
         }
 
@@ -166,136 +166,136 @@ class DOMCaster
 
     public static function castCharacterData(\DOMCharacterData $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'data' => $dom->data,
             'length' => $dom->length,
-        );
+        ];
 
         return $a;
     }
 
     public static function castAttr(\DOMAttr $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'name' => $dom->name,
             'specified' => $dom->specified,
             'value' => $dom->value,
             'ownerElement' => $dom->ownerElement,
             'schemaTypeInfo' => $dom->schemaTypeInfo,
-        );
+        ];
 
         return $a;
     }
 
     public static function castElement(\DOMElement $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'tagName' => $dom->tagName,
             'schemaTypeInfo' => $dom->schemaTypeInfo,
-        );
+        ];
 
         return $a;
     }
 
     public static function castText(\DOMText $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'wholeText' => $dom->wholeText,
-        );
+        ];
 
         return $a;
     }
 
     public static function castTypeinfo(\DOMTypeinfo $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'typeName' => $dom->typeName,
             'typeNamespace' => $dom->typeNamespace,
-        );
+        ];
 
         return $a;
     }
 
     public static function castDomError(\DOMDomError $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'severity' => $dom->severity,
             'message' => $dom->message,
             'type' => $dom->type,
             'relatedException' => $dom->relatedException,
             'related_data' => $dom->related_data,
             'location' => $dom->location,
-        );
+        ];
 
         return $a;
     }
 
     public static function castLocator(\DOMLocator $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'lineNumber' => $dom->lineNumber,
             'columnNumber' => $dom->columnNumber,
             'offset' => $dom->offset,
             'relatedNode' => $dom->relatedNode,
             'uri' => $dom->uri ? new LinkStub($dom->uri, $dom->lineNumber) : $dom->uri,
-        );
+        ];
 
         return $a;
     }
 
     public static function castDocumentType(\DOMDocumentType $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'name' => $dom->name,
             'entities' => $dom->entities,
             'notations' => $dom->notations,
             'publicId' => $dom->publicId,
             'systemId' => $dom->systemId,
             'internalSubset' => $dom->internalSubset,
-        );
+        ];
 
         return $a;
     }
 
     public static function castNotation(\DOMNotation $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'publicId' => $dom->publicId,
             'systemId' => $dom->systemId,
-        );
+        ];
 
         return $a;
     }
 
     public static function castEntity(\DOMEntity $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'publicId' => $dom->publicId,
             'systemId' => $dom->systemId,
             'notationName' => $dom->notationName,
             'actualEncoding' => $dom->actualEncoding,
             'encoding' => $dom->encoding,
             'version' => $dom->version,
-        );
+        ];
 
         return $a;
     }
 
     public static function castProcessingInstruction(\DOMProcessingInstruction $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'target' => $dom->target,
             'data' => $dom->data,
-        );
+        ];
 
         return $a;
     }
 
     public static function castXPath(\DOMXPath $dom, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             'document' => $dom->document,
-        );
+        ];
 
         return $a;
     }
diff --git a/src/Symfony/Component/VarDumper/Caster/DateCaster.php b/src/Symfony/Component/VarDumper/Caster/DateCaster.php
index da6a5a70d6..29c123d6ee 100644
--- a/src/Symfony/Component/VarDumper/Caster/DateCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DateCaster.php
@@ -33,7 +33,7 @@ class DateCaster
             .($location ? ($d->format('I') ? "\nDST On" : "\nDST Off") : '')
         ;
 
-        $a = array();
+        $a = [];
         $a[$prefix.'date'] = new ConstStub(self::formatDateTime($d, $location ? ' e (P)' : ' P'), $title);
 
         $stub->class .= $d->format(' @U');
@@ -47,7 +47,7 @@ class DateCaster
         $numberOfSeconds = $now->add($interval)->getTimestamp() - $now->getTimestamp();
         $title = number_format($numberOfSeconds, 0, '.', ' ').'s';
 
-        $i = array(Caster::PREFIX_VIRTUAL.'interval' => new ConstStub(self::formatInterval($interval), $title));
+        $i = [Caster::PREFIX_VIRTUAL.'interval' => new ConstStub(self::formatInterval($interval), $title)];
 
         return $filter & Caster::EXCLUDE_VERBOSE ? $i : $i + $a;
     }
@@ -75,14 +75,14 @@ class DateCaster
         $formatted = (new \DateTime('now', $timeZone))->format($location ? 'e (P)' : 'P');
         $title = $location && \extension_loaded('intl') ? \Locale::getDisplayRegion('-'.$location['country_code']) : '';
 
-        $z = array(Caster::PREFIX_VIRTUAL.'timezone' => new ConstStub($formatted, $title));
+        $z = [Caster::PREFIX_VIRTUAL.'timezone' => new ConstStub($formatted, $title)];
 
         return $filter & Caster::EXCLUDE_VERBOSE ? $z : $z + $a;
     }
 
     public static function castPeriod(\DatePeriod $p, array $a, Stub $stub, $isNested, $filter)
     {
-        $dates = array();
+        $dates = [];
         if (\PHP_VERSION_ID >= 70107) { // see https://bugs.php.net/bug.php?id=74639
             foreach (clone $p as $i => $d) {
                 if (self::PERIOD_LIMIT === $i) {
@@ -105,7 +105,7 @@ class DateCaster
             ($end = $p->getEndDate()) ? 'to '.self::formatDateTime($end) : 'recurring '.$p->recurrences.' time/s'
         );
 
-        $p = array(Caster::PREFIX_VIRTUAL.'period' => new ConstStub($period, implode("\n", $dates)));
+        $p = [Caster::PREFIX_VIRTUAL.'period' => new ConstStub($period, implode("\n", $dates))];
 
         return $filter & Caster::EXCLUDE_VERBOSE ? $p : $p + $a;
     }
diff --git a/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php b/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
index 785d0270d7..6adf9dd837 100644
--- a/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DoctrineCaster.php
@@ -25,7 +25,7 @@ class DoctrineCaster
 {
     public static function castCommonProxy(CommonProxy $proxy, array $a, Stub $stub, $isNested)
     {
-        foreach (array('__cloner__', '__initializer__') as $k) {
+        foreach (['__cloner__', '__initializer__'] as $k) {
             if (array_key_exists($k, $a)) {
                 unset($a[$k]);
                 ++$stub->cut;
@@ -37,7 +37,7 @@ class DoctrineCaster
 
     public static function castOrmProxy(OrmProxy $proxy, array $a, Stub $stub, $isNested)
     {
-        foreach (array('_entityPersister', '_identifier') as $k) {
+        foreach (['_entityPersister', '_identifier'] as $k) {
             if (array_key_exists($k = "\0Doctrine\\ORM\\Proxy\\Proxy\0".$k, $a)) {
                 unset($a[$k]);
                 ++$stub->cut;
@@ -49,7 +49,7 @@ class DoctrineCaster
 
     public static function castPersistentCollection(PersistentCollection $coll, array $a, Stub $stub, $isNested)
     {
-        foreach (array('snapshot', 'association', 'typeClass') as $k) {
+        foreach (['snapshot', 'association', 'typeClass'] as $k) {
             if (array_key_exists($k = "\0Doctrine\\ORM\\PersistentCollection\0".$k, $a)) {
                 $a[$k] = new CutStub($a[$k]);
             }
diff --git a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
index f3af638d94..06cd11e63d 100644
--- a/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ExceptionCaster.php
@@ -24,7 +24,7 @@ class ExceptionCaster
 {
     public static $srcContext = 1;
     public static $traceArgs = true;
-    public static $errorTypes = array(
+    public static $errorTypes = [
         E_DEPRECATED => 'E_DEPRECATED',
         E_USER_DEPRECATED => 'E_USER_DEPRECATED',
         E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
@@ -40,9 +40,9 @@ class ExceptionCaster
         E_USER_WARNING => 'E_USER_WARNING',
         E_USER_NOTICE => 'E_USER_NOTICE',
         E_STRICT => 'E_STRICT',
-    );
+    ];
 
-    private static $framesCache = array();
+    private static $framesCache = [];
 
     public static function castError(\Error $e, array $a, Stub $stub, $isNested, $filter = 0)
     {
@@ -94,10 +94,10 @@ class ExceptionCaster
             $a[$s] = new ConstStub(self::$errorTypes[$a[$s]], $a[$s]);
         }
 
-        $trace = array(array(
+        $trace = [[
             'file' => $a[$sPrefix.'file'],
             'line' => $a[$sPrefix.'line'],
-        ));
+        ]];
 
         if (isset($a[$sPrefix.'trace'])) {
             $trace = array_merge($trace, $a[$sPrefix.'trace']);
@@ -119,16 +119,16 @@ class ExceptionCaster
         $frames = $trace->value;
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a = array();
+        $a = [];
         $j = \count($frames);
         if (0 > $i = $trace->sliceOffset) {
             $i = max(0, $j + $i);
         }
         if (!isset($trace->value[$i])) {
-            return array();
+            return [];
         }
         $lastCall = isset($frames[$i]['function']) ? (isset($frames[$i]['class']) ? $frames[0]['class'].$frames[$i]['type'] : '').$frames[$i]['function'].'()' : '';
-        $frames[] = array('function' => '');
+        $frames[] = ['function' => ''];
         $collapse = false;
 
         for ($j += $trace->numberingOffset - $i++; isset($frames[$i]); ++$i, --$j) {
@@ -136,16 +136,16 @@ class ExceptionCaster
             $call = isset($f['function']) ? (isset($f['class']) ? $f['class'].$f['type'] : '').$f['function'] : '???';
 
             $frame = new FrameStub(
-                array(
+                [
                     'object' => isset($f['object']) ? $f['object'] : null,
                     'class' => isset($f['class']) ? $f['class'] : null,
                     'type' => isset($f['type']) ? $f['type'] : null,
                     'function' => isset($f['function']) ? $f['function'] : null,
-                ) + $frames[$i - 1],
+                ] + $frames[$i - 1],
                 false,
                 true
             );
-            $f = self::castFrameStub($frame, array(), $frame, true);
+            $f = self::castFrameStub($frame, [], $frame, true);
             if (isset($f[$prefix.'src'])) {
                 foreach ($f[$prefix.'src']->value as $label => $frame) {
                     if (0 === strpos($label, "\0~collapse=0")) {
@@ -241,7 +241,7 @@ class ExceptionCaster
                     $srcAttr .= '&separator=:';
                 }
                 $srcAttr .= $ellipsis ? '&ellipsis-type=path&ellipsis='.$ellipsis.'&ellipsis-tail='.$ellipsisTail : '';
-                self::$framesCache[$cacheKey] = $a[$prefix.'src'] = new EnumStub(array("\0~$srcAttr\0$srcKey" => $src));
+                self::$framesCache[$cacheKey] = $a[$prefix.'src'] = new EnumStub(["\0~$srcAttr\0$srcKey" => $src]);
             }
         }
 
@@ -267,7 +267,7 @@ class ExceptionCaster
             $trace = $a[$xPrefix.'trace'];
             unset($a[$xPrefix.'trace']); // Ensures the trace is always last
         } else {
-            $trace = array();
+            $trace = [];
         }
 
         if (!($filter & Caster::EXCLUDE_VERBOSE) && $trace) {
@@ -299,23 +299,23 @@ class ExceptionCaster
         if (isset($trace[0]['file'], $trace[0]['line']) && $trace[0]['file'] === $file && $trace[0]['line'] === $line) {
             return;
         }
-        array_unshift($trace, array(
+        array_unshift($trace, [
             'function' => $class ? 'new '.$class : null,
             'file' => $file,
             'line' => $line,
-        ));
+        ]);
     }
 
     private static function extractSource($srcLines, $line, $srcContext, $title, $lang, $file = null)
     {
         $srcLines = explode("\n", $srcLines);
-        $src = array();
+        $src = [];
 
         for ($i = $line - 1 - $srcContext; $i <= $line - 1 + $srcContext; ++$i) {
             $src[] = (isset($srcLines[$i]) ? $srcLines[$i] : '')."\n";
         }
 
-        $srcLines = array();
+        $srcLines = [];
         $ltrim = 0;
         do {
             $pad = null;
diff --git a/src/Symfony/Component/VarDumper/Caster/IntlCaster.php b/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
index a69813079c..7794d6cbcc 100644
--- a/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/IntlCaster.php
@@ -21,20 +21,20 @@ class IntlCaster
 {
     public static function castMessageFormatter(\MessageFormatter $c, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'locale' => $c->getLocale(),
             Caster::PREFIX_VIRTUAL.'pattern' => $c->getPattern(),
-        );
+        ];
 
         return self::castError($c, $a);
     }
 
     public static function castNumberFormatter(\NumberFormatter $c, array $a, Stub $stub, $isNested, $filter = 0)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'locale' => $c->getLocale(),
             Caster::PREFIX_VIRTUAL.'pattern' => $c->getPattern(),
-        );
+        ];
 
         if ($filter & Caster::EXCLUDE_VERBOSE) {
             $stub->cut += 3;
@@ -42,9 +42,9 @@ class IntlCaster
             return self::castError($c, $a);
         }
 
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'attributes' => new EnumStub(
-                array(
+                [
                     'PARSE_INT_ONLY' => $c->getAttribute(\NumberFormatter::PARSE_INT_ONLY),
                     'GROUPING_USED' => $c->getAttribute(\NumberFormatter::GROUPING_USED),
                     'DECIMAL_ALWAYS_SHOWN' => $c->getAttribute(\NumberFormatter::DECIMAL_ALWAYS_SHOWN),
@@ -65,10 +65,10 @@ class IntlCaster
                     'MIN_SIGNIFICANT_DIGITS' => $c->getAttribute(\NumberFormatter::MIN_SIGNIFICANT_DIGITS),
                     'MAX_SIGNIFICANT_DIGITS' => $c->getAttribute(\NumberFormatter::MAX_SIGNIFICANT_DIGITS),
                     'LENIENT_PARSE' => $c->getAttribute(\NumberFormatter::LENIENT_PARSE),
-                )
+                ]
             ),
             Caster::PREFIX_VIRTUAL.'text_attributes' => new EnumStub(
-                array(
+                [
                     'POSITIVE_PREFIX' => $c->getTextAttribute(\NumberFormatter::POSITIVE_PREFIX),
                     'POSITIVE_SUFFIX' => $c->getTextAttribute(\NumberFormatter::POSITIVE_SUFFIX),
                     'NEGATIVE_PREFIX' => $c->getTextAttribute(\NumberFormatter::NEGATIVE_PREFIX),
@@ -77,10 +77,10 @@ class IntlCaster
                     'CURRENCY_CODE' => $c->getTextAttribute(\NumberFormatter::CURRENCY_CODE),
                     'DEFAULT_RULESET' => $c->getTextAttribute(\NumberFormatter::DEFAULT_RULESET),
                     'PUBLIC_RULESETS' => $c->getTextAttribute(\NumberFormatter::PUBLIC_RULESETS),
-                )
+                ]
             ),
             Caster::PREFIX_VIRTUAL.'symbols' => new EnumStub(
-                array(
+                [
                     'DECIMAL_SEPARATOR_SYMBOL' => $c->getSymbol(\NumberFormatter::DECIMAL_SEPARATOR_SYMBOL),
                     'GROUPING_SEPARATOR_SYMBOL' => $c->getSymbol(\NumberFormatter::GROUPING_SEPARATOR_SYMBOL),
                     'PATTERN_SEPARATOR_SYMBOL' => $c->getSymbol(\NumberFormatter::PATTERN_SEPARATOR_SYMBOL),
@@ -99,25 +99,25 @@ class IntlCaster
                     'NAN_SYMBOL' => $c->getSymbol(\NumberFormatter::NAN_SYMBOL),
                     'SIGNIFICANT_DIGIT_SYMBOL' => $c->getSymbol(\NumberFormatter::SIGNIFICANT_DIGIT_SYMBOL),
                     'MONETARY_GROUPING_SEPARATOR_SYMBOL' => $c->getSymbol(\NumberFormatter::MONETARY_GROUPING_SEPARATOR_SYMBOL),
-                )
+                ]
              ),
-        );
+        ];
 
         return self::castError($c, $a);
     }
 
     public static function castIntlTimeZone(\IntlTimeZone $c, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'display_name' => $c->getDisplayName(),
             Caster::PREFIX_VIRTUAL.'id' => $c->getID(),
             Caster::PREFIX_VIRTUAL.'raw_offset' => $c->getRawOffset(),
-        );
+        ];
 
         if ($c->useDaylightTime()) {
-            $a += array(
+            $a += [
                 Caster::PREFIX_VIRTUAL.'dst_savings' => $c->getDSTSavings(),
-            );
+            ];
         }
 
         return self::castError($c, $a);
@@ -125,7 +125,7 @@ class IntlCaster
 
     public static function castIntlCalendar(\IntlCalendar $c, array $a, Stub $stub, $isNested, $filter = 0)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'type' => $c->getType(),
             Caster::PREFIX_VIRTUAL.'first_day_of_week' => $c->getFirstDayOfWeek(),
             Caster::PREFIX_VIRTUAL.'minimal_days_in_first_week' => $c->getMinimalDaysInFirstWeek(),
@@ -136,14 +136,14 @@ class IntlCaster
             Caster::PREFIX_VIRTUAL.'in_daylight_time' => $c->inDaylightTime(),
             Caster::PREFIX_VIRTUAL.'is_lenient' => $c->isLenient(),
             Caster::PREFIX_VIRTUAL.'time_zone' => ($filter & Caster::EXCLUDE_VERBOSE) ? new CutStub($c->getTimeZone()) : $c->getTimeZone(),
-        );
+        ];
 
         return self::castError($c, $a);
     }
 
     public static function castIntlDateFormatter(\IntlDateFormatter $c, array $a, Stub $stub, $isNested, $filter = 0)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'locale' => $c->getLocale(),
             Caster::PREFIX_VIRTUAL.'pattern' => $c->getPattern(),
             Caster::PREFIX_VIRTUAL.'calendar' => $c->getCalendar(),
@@ -152,7 +152,7 @@ class IntlCaster
             Caster::PREFIX_VIRTUAL.'date_type' => $c->getDateType(),
             Caster::PREFIX_VIRTUAL.'calendar_object' => ($filter & Caster::EXCLUDE_VERBOSE) ? new CutStub($c->getCalendarObject()) : $c->getCalendarObject(),
             Caster::PREFIX_VIRTUAL.'time_zone' => ($filter & Caster::EXCLUDE_VERBOSE) ? new CutStub($c->getTimeZone()) : $c->getTimeZone(),
-        );
+        ];
 
         return self::castError($c, $a);
     }
@@ -160,10 +160,10 @@ class IntlCaster
     private static function castError($c, array $a): array
     {
         if ($errorCode = $c->getErrorCode()) {
-            $a += array(
+            $a += [
                 Caster::PREFIX_VIRTUAL.'error_code' => $errorCode,
                 Caster::PREFIX_VIRTUAL.'error_message' => $c->getErrorMessage(),
-            );
+            ];
         }
 
         return $a;
diff --git a/src/Symfony/Component/VarDumper/Caster/LinkStub.php b/src/Symfony/Component/VarDumper/Caster/LinkStub.php
index 5c133c6683..84a8b10d40 100644
--- a/src/Symfony/Component/VarDumper/Caster/LinkStub.php
+++ b/src/Symfony/Component/VarDumper/Caster/LinkStub.php
@@ -66,7 +66,7 @@ class LinkStub extends ConstStub
     private function getComposerRoot($file, &$inVendor)
     {
         if (null === self::$vendorRoots) {
-            self::$vendorRoots = array();
+            self::$vendorRoots = [];
 
             foreach (get_declared_classes() as $class) {
                 if ('C' === $class[0] && 0 === strpos($class, 'ComposerAutoloaderInit')) {
diff --git a/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php b/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
index 99a33bca63..a32654683d 100644
--- a/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/MemcachedCaster.php
@@ -23,12 +23,12 @@ class MemcachedCaster
 
     public static function castMemcached(\Memcached $c, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'servers' => $c->getServerList(),
             Caster::PREFIX_VIRTUAL.'options' => new EnumStub(
                 self::getNonDefaultOptions($c)
             ),
-        );
+        ];
 
         return $a;
     }
@@ -38,7 +38,7 @@ class MemcachedCaster
         self::$defaultOptions = self::$defaultOptions ?? self::discoverDefaultOptions();
         self::$optionConstants = self::$optionConstants ?? self::getOptionConstants();
 
-        $nonDefaultOptions = array();
+        $nonDefaultOptions = [];
         foreach (self::$optionConstants as $constantKey => $value) {
             if (self::$defaultOptions[$constantKey] !== $option = $c->getOption($value)) {
                 $nonDefaultOptions[$constantKey] = $option;
@@ -53,7 +53,7 @@ class MemcachedCaster
         $defaultMemcached = new \Memcached();
         $defaultMemcached->addServer('127.0.0.1', 11211);
 
-        $defaultOptions = array();
+        $defaultOptions = [];
         self::$optionConstants = self::$optionConstants ?? self::getOptionConstants();
 
         foreach (self::$optionConstants as $constantKey => $value) {
@@ -67,7 +67,7 @@ class MemcachedCaster
     {
         $reflectedMemcached = new \ReflectionClass(\Memcached::class);
 
-        $optionConstants = array();
+        $optionConstants = [];
         foreach ($reflectedMemcached->getConstants() as $constantKey => $value) {
             if (0 === strpos($constantKey, 'OPT_')) {
                 $optionConstants[$constantKey] = $value;
diff --git a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
index 83a001d960..8af51829a9 100644
--- a/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/PdoCaster.php
@@ -20,53 +20,53 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class PdoCaster
 {
-    private static $pdoAttributes = array(
-        'CASE' => array(
+    private static $pdoAttributes = [
+        'CASE' => [
             \PDO::CASE_LOWER => 'LOWER',
             \PDO::CASE_NATURAL => 'NATURAL',
             \PDO::CASE_UPPER => 'UPPER',
-        ),
-        'ERRMODE' => array(
+        ],
+        'ERRMODE' => [
             \PDO::ERRMODE_SILENT => 'SILENT',
             \PDO::ERRMODE_WARNING => 'WARNING',
             \PDO::ERRMODE_EXCEPTION => 'EXCEPTION',
-        ),
+        ],
         'TIMEOUT',
         'PREFETCH',
         'AUTOCOMMIT',
         'PERSISTENT',
         'DRIVER_NAME',
         'SERVER_INFO',
-        'ORACLE_NULLS' => array(
+        'ORACLE_NULLS' => [
             \PDO::NULL_NATURAL => 'NATURAL',
             \PDO::NULL_EMPTY_STRING => 'EMPTY_STRING',
             \PDO::NULL_TO_STRING => 'TO_STRING',
-        ),
+        ],
         'CLIENT_VERSION',
         'SERVER_VERSION',
         'STATEMENT_CLASS',
         'EMULATE_PREPARES',
         'CONNECTION_STATUS',
         'STRINGIFY_FETCHES',
-        'DEFAULT_FETCH_MODE' => array(
+        'DEFAULT_FETCH_MODE' => [
             \PDO::FETCH_ASSOC => 'ASSOC',
             \PDO::FETCH_BOTH => 'BOTH',
             \PDO::FETCH_LAZY => 'LAZY',
             \PDO::FETCH_NUM => 'NUM',
             \PDO::FETCH_OBJ => 'OBJ',
-        ),
-    );
+        ],
+    ];
 
     public static function castPdo(\PDO $c, array $a, Stub $stub, $isNested)
     {
-        $attr = array();
+        $attr = [];
         $errmode = $c->getAttribute(\PDO::ATTR_ERRMODE);
         $c->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
 
         foreach (self::$pdoAttributes as $k => $v) {
             if (!isset($k[0])) {
                 $k = $v;
-                $v = array();
+                $v = [];
             }
 
             try {
@@ -85,11 +85,11 @@ class PdoCaster
         }
 
         $prefix = Caster::PREFIX_VIRTUAL;
-        $a += array(
+        $a += [
             $prefix.'inTransaction' => method_exists($c, 'inTransaction'),
             $prefix.'errorInfo' => $c->errorInfo(),
             $prefix.'attributes' => new EnumStub($attr),
-        );
+        ];
 
         if ($a[$prefix.'inTransaction']) {
             $a[$prefix.'inTransaction'] = $c->inTransaction();
diff --git a/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php b/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
index 88414e4ccf..cd6bf5b5fe 100644
--- a/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/PgSqlCaster.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class PgSqlCaster
 {
-    private static $paramCodes = array(
+    private static $paramCodes = [
         'server_encoding',
         'client_encoding',
         'is_superuser',
@@ -31,17 +31,17 @@ class PgSqlCaster
         'integer_datetimes',
         'application_name',
         'standard_conforming_strings',
-    );
+    ];
 
-    private static $transactionStatus = array(
+    private static $transactionStatus = [
         PGSQL_TRANSACTION_IDLE => 'PGSQL_TRANSACTION_IDLE',
         PGSQL_TRANSACTION_ACTIVE => 'PGSQL_TRANSACTION_ACTIVE',
         PGSQL_TRANSACTION_INTRANS => 'PGSQL_TRANSACTION_INTRANS',
         PGSQL_TRANSACTION_INERROR => 'PGSQL_TRANSACTION_INERROR',
         PGSQL_TRANSACTION_UNKNOWN => 'PGSQL_TRANSACTION_UNKNOWN',
-    );
+    ];
 
-    private static $resultStatus = array(
+    private static $resultStatus = [
         PGSQL_EMPTY_QUERY => 'PGSQL_EMPTY_QUERY',
         PGSQL_COMMAND_OK => 'PGSQL_COMMAND_OK',
         PGSQL_TUPLES_OK => 'PGSQL_TUPLES_OK',
@@ -50,9 +50,9 @@ class PgSqlCaster
         PGSQL_BAD_RESPONSE => 'PGSQL_BAD_RESPONSE',
         PGSQL_NONFATAL_ERROR => 'PGSQL_NONFATAL_ERROR',
         PGSQL_FATAL_ERROR => 'PGSQL_FATAL_ERROR',
-    );
+    ];
 
-    private static $diagCodes = array(
+    private static $diagCodes = [
         'severity' => PGSQL_DIAG_SEVERITY,
         'sqlstate' => PGSQL_DIAG_SQLSTATE,
         'message' => PGSQL_DIAG_MESSAGE_PRIMARY,
@@ -65,7 +65,7 @@ class PgSqlCaster
         'file' => PGSQL_DIAG_SOURCE_FILE,
         'line' => PGSQL_DIAG_SOURCE_LINE,
         'function' => PGSQL_DIAG_SOURCE_FUNCTION,
-    );
+    ];
 
     public static function castLargeObject($lo, array $a, Stub $stub, $isNested)
     {
@@ -127,14 +127,14 @@ class PgSqlCaster
         $fields = pg_num_fields($result);
 
         for ($i = 0; $i < $fields; ++$i) {
-            $field = array(
+            $field = [
                 'name' => pg_field_name($result, $i),
                 'table' => sprintf('%s (OID: %s)', pg_field_table($result, $i), pg_field_table($result, $i, true)),
                 'type' => sprintf('%s (OID: %s)', pg_field_type($result, $i), pg_field_type_oid($result, $i)),
                 'nullable' => (bool) pg_field_is_null($result, $i),
                 'storage' => pg_field_size($result, $i).' bytes',
                 'display' => pg_field_prtlen($result, $i).' chars',
-            );
+            ];
             if (' (OID: )' === $field['table']) {
                 $field['table'] = null;
             }
diff --git a/src/Symfony/Component/VarDumper/Caster/RedisCaster.php b/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
index 0fcd9d96fd..558a0804d5 100644
--- a/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/RedisCaster.php
@@ -20,43 +20,43 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class RedisCaster
 {
-    private static $serializer = array(
+    private static $serializer = [
         \Redis::SERIALIZER_NONE => 'NONE',
         \Redis::SERIALIZER_PHP => 'PHP',
         2 => 'IGBINARY', // Optional Redis::SERIALIZER_IGBINARY
-    );
+    ];
 
-    private static $mode = array(
+    private static $mode = [
         \Redis::ATOMIC => 'ATOMIC',
         \Redis::MULTI => 'MULTI',
         \Redis::PIPELINE => 'PIPELINE',
-    );
+    ];
 
-    private static $compression = array(
+    private static $compression = [
         0 => 'NONE', // Redis::COMPRESSION_NONE
         1 => 'LZF',  // Redis::COMPRESSION_LZF
-    );
+    ];
 
-    private static $failover = array(
+    private static $failover = [
         \RedisCluster::FAILOVER_NONE => 'NONE',
         \RedisCluster::FAILOVER_ERROR => 'ERROR',
         \RedisCluster::FAILOVER_DISTRIBUTE => 'DISTRIBUTE',
         \RedisCluster::FAILOVER_DISTRIBUTE_SLAVES => 'DISTRIBUTE_SLAVES',
-    );
+    ];
 
     public static function castRedis(\Redis $c, array $a, Stub $stub, $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
         if (!$connected = $c->isConnected()) {
-            return $a + array(
+            return $a + [
                 $prefix.'isConnected' => $connected,
-            );
+            ];
         }
 
         $mode = $c->getMode();
 
-        return $a + array(
+        return $a + [
             $prefix.'isConnected' => $connected,
             $prefix.'host' => $c->getHost(),
             $prefix.'port' => $c->getPort(),
@@ -67,19 +67,19 @@ class RedisCaster
             $prefix.'lastError' => $c->getLastError(),
             $prefix.'persistentId' => $c->getPersistentID(),
             $prefix.'options' => self::getRedisOptions($c),
-        );
+        ];
     }
 
     public static function castRedisArray(\RedisArray $c, array $a, Stub $stub, $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        return $a + array(
+        return $a + [
             $prefix.'hosts' => $c->_hosts(),
             $prefix.'function' => ClassStub::wrapCallable($c->_function()),
             $prefix.'lastError' => $c->getLastError(),
             $prefix.'options' => self::getRedisOptions($c),
-        );
+        ];
     }
 
     public static function castRedisCluster(\RedisCluster $c, array $a, Stub $stub, $isNested)
@@ -87,15 +87,15 @@ class RedisCaster
         $prefix = Caster::PREFIX_VIRTUAL;
         $failover = $c->getOption(\RedisCluster::OPT_SLAVE_FAILOVER);
 
-        $a += array(
+        $a += [
             $prefix.'_masters' => $c->_masters(),
             $prefix.'_redir' => $c->_redir(),
             $prefix.'mode' => new ConstStub($c->getMode() ? 'MULTI' : 'ATOMIC', $c->getMode()),
             $prefix.'lastError' => $c->getLastError(),
-            $prefix.'options' => self::getRedisOptions($c, array(
+            $prefix.'options' => self::getRedisOptions($c, [
                 'SLAVE_FAILOVER' => isset(self::$failover[$failover]) ? new ConstStub(self::$failover[$failover], $failover) : $failover,
-            )),
-        );
+            ]),
+        ];
 
         return $a;
     }
@@ -103,7 +103,7 @@ class RedisCaster
     /**
      * @param \Redis|\RedisArray|\RedisCluster $redis
      */
-    private static function getRedisOptions($redis, array $options = array()): EnumStub
+    private static function getRedisOptions($redis, array $options = []): EnumStub
     {
         $serializer = $redis->getOption(\Redis::OPT_SERIALIZER);
         if (\is_array($serializer)) {
@@ -136,14 +136,14 @@ class RedisCaster
             $retry = new ConstStub($retry ? 'RETRY' : 'NORETRY', $retry);
         }
 
-        $options += array(
+        $options += [
             'TCP_KEEPALIVE' => \defined('Redis::OPT_TCP_KEEPALIVE') ? $redis->getOption(\Redis::OPT_TCP_KEEPALIVE) : 0,
             'READ_TIMEOUT' => $redis->getOption(\Redis::OPT_READ_TIMEOUT),
             'COMPRESSION' => $compression,
             'SERIALIZER' => $serializer,
             'PREFIX' => $redis->getOption(\Redis::OPT_PREFIX),
             'SCAN' => $retry,
-        );
+        ];
 
         return new EnumStub($options);
     }
diff --git a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
index 35a764a502..1ecfa2d2d1 100644
--- a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class ReflectionCaster
 {
-    private static $extraMap = array(
+    private static $extraMap = [
         'docComment' => 'getDocComment',
         'extension' => 'getExtensionName',
         'isDisabled' => 'isDisabled',
@@ -29,7 +29,7 @@ class ReflectionCaster
         'isUserDefined' => 'isUserDefined',
         'isGenerator' => 'isGenerator',
         'isVariadic' => 'isVariadic',
-    );
+    ];
 
     public static function castClosure(\Closure $c, array $a, Stub $stub, $isNested, $filter = 0)
     {
@@ -49,14 +49,14 @@ class ReflectionCaster
         if ($filter & Caster::EXCLUDE_VERBOSE) {
             $stub->cut += ($c->getFileName() ? 2 : 0) + \count($a);
 
-            return array();
+            return [];
         }
 
         if (isset($a[$prefix.'parameters'])) {
             foreach ($a[$prefix.'parameters']->value as &$v) {
                 $param = $v;
-                $v = new EnumStub(array());
-                foreach (static::castParameter($param, array(), $stub, true) as $k => $param) {
+                $v = new EnumStub([]);
+                foreach (static::castParameter($param, [], $stub, true) as $k => $param) {
                     if ("\0" === $k[0]) {
                         $v->value[substr($k, 3)] = $param;
                     }
@@ -95,11 +95,11 @@ class ReflectionCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        $a += array(
+        $a += [
             $prefix.'name' => $c->getName(),
             $prefix.'allowsNull' => $c->allowsNull(),
             $prefix.'isBuiltin' => $c->isBuiltin(),
-        );
+        ];
 
         return $a;
     }
@@ -112,28 +112,28 @@ class ReflectionCaster
             $a[$prefix.'this'] = new CutStub($c->getThis());
         }
         $function = $c->getFunction();
-        $frame = array(
+        $frame = [
             'class' => isset($function->class) ? $function->class : null,
             'type' => isset($function->class) ? ($function->isStatic() ? '::' : '->') : null,
             'function' => $function->name,
             'file' => $c->getExecutingFile(),
             'line' => $c->getExecutingLine(),
-        );
+        ];
         if ($trace = $c->getTrace(DEBUG_BACKTRACE_IGNORE_ARGS)) {
             $function = new \ReflectionGenerator($c->getExecutingGenerator());
-            array_unshift($trace, array(
+            array_unshift($trace, [
                 'function' => 'yield',
                 'file' => $function->getExecutingFile(),
                 'line' => $function->getExecutingLine() - 1,
-            ));
+            ]);
             $trace[] = $frame;
             $a[$prefix.'trace'] = new TraceStub($trace, false, 0, -1, -1);
         } else {
             $function = new FrameStub($frame, false, true);
-            $function = ExceptionCaster::castFrameStub($function, array(), $function, true);
-            $a[$prefix.'executing'] = new EnumStub(array(
+            $function = ExceptionCaster::castFrameStub($function, [], $function, true);
+            $a[$prefix.'executing'] = new EnumStub([
                 "\0~separator= \0".$frame['class'].$frame['type'].$frame['function'].'()' => $function[$prefix.'src'],
-            ));
+            ]);
         }
 
         $a[Caster::PREFIX_VIRTUAL.'closed'] = false;
@@ -149,11 +149,11 @@ class ReflectionCaster
             $a[$prefix.'modifiers'] = implode(' ', $n);
         }
 
-        self::addMap($a, $c, array(
+        self::addMap($a, $c, [
             'extends' => 'getParentClass',
             'implements' => 'getInterfaceNames',
             'constants' => 'getConstants',
-        ));
+        ]);
 
         foreach ($c->getProperties() as $n) {
             $a[$prefix.'properties'][$n->name] = $n;
@@ -174,17 +174,17 @@ class ReflectionCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        self::addMap($a, $c, array(
+        self::addMap($a, $c, [
             'returnsReference' => 'returnsReference',
             'returnType' => 'getReturnType',
             'class' => 'getClosureScopeClass',
             'this' => 'getClosureThis',
-        ));
+        ]);
 
         if (isset($a[$prefix.'returnType'])) {
             $v = $a[$prefix.'returnType'];
             $v = $v->getName();
-            $a[$prefix.'returnType'] = new ClassStub($a[$prefix.'returnType']->allowsNull() ? '?'.$v : $v, array(class_exists($v, false) || interface_exists($v, false) || trait_exists($v, false) ? $v : '', ''));
+            $a[$prefix.'returnType'] = new ClassStub($a[$prefix.'returnType']->allowsNull() ? '?'.$v : $v, [class_exists($v, false) || interface_exists($v, false) || trait_exists($v, false) ? $v : '', '']);
         }
         if (isset($a[$prefix.'class'])) {
             $a[$prefix.'class'] = new ClassStub($a[$prefix.'class']);
@@ -237,12 +237,12 @@ class ReflectionCaster
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
-        self::addMap($a, $c, array(
+        self::addMap($a, $c, [
             'position' => 'getPosition',
             'isVariadic' => 'isVariadic',
             'byReference' => 'isPassedByReference',
             'allowsNull' => 'allowsNull',
-        ));
+        ]);
 
         if ($v = $c->getType()) {
             $a[$prefix.'typeHint'] = $v->getName();
@@ -250,7 +250,7 @@ class ReflectionCaster
 
         if (isset($a[$prefix.'typeHint'])) {
             $v = $a[$prefix.'typeHint'];
-            $a[$prefix.'typeHint'] = new ClassStub($v, array(class_exists($v, false) || interface_exists($v, false) || trait_exists($v, false) ? $v : '', ''));
+            $a[$prefix.'typeHint'] = new ClassStub($v, [class_exists($v, false) || interface_exists($v, false) || trait_exists($v, false) ? $v : '', '']);
         } else {
             unset($a[$prefix.'allowsNull']);
         }
@@ -279,7 +279,7 @@ class ReflectionCaster
 
     public static function castExtension(\ReflectionExtension $c, array $a, Stub $stub, $isNested)
     {
-        self::addMap($a, $c, array(
+        self::addMap($a, $c, [
             'version' => 'getVersion',
             'dependencies' => 'getDependencies',
             'iniEntries' => 'getIniEntries',
@@ -288,19 +288,19 @@ class ReflectionCaster
             'constants' => 'getConstants',
             'functions' => 'getFunctions',
             'classes' => 'getClasses',
-        ));
+        ]);
 
         return $a;
     }
 
     public static function castZendExtension(\ReflectionZendExtension $c, array $a, Stub $stub, $isNested)
     {
-        self::addMap($a, $c, array(
+        self::addMap($a, $c, [
             'version' => 'getVersion',
             'author' => 'getAuthor',
             'copyright' => 'getCopyright',
             'url' => 'getURL',
-        ));
+        ]);
 
         return $a;
     }
@@ -353,7 +353,7 @@ class ReflectionCaster
 
     private static function addExtra(&$a, \Reflector $c)
     {
-        $x = isset($a[Caster::PREFIX_VIRTUAL.'extra']) ? $a[Caster::PREFIX_VIRTUAL.'extra']->value : array();
+        $x = isset($a[Caster::PREFIX_VIRTUAL.'extra']) ? $a[Caster::PREFIX_VIRTUAL.'extra']->value : [];
 
         if (method_exists($c, 'getFileName') && $m = $c->getFileName()) {
             $x['file'] = new LinkStub($m, $c->getStartLine());
diff --git a/src/Symfony/Component/VarDumper/Caster/SplCaster.php b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
index 0780c0a371..a223adb7f2 100644
--- a/src/Symfony/Component/VarDumper/Caster/SplCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
@@ -20,12 +20,12 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class SplCaster
 {
-    private static $splFileObjectFlags = array(
+    private static $splFileObjectFlags = [
         \SplFileObject::DROP_NEW_LINE => 'DROP_NEW_LINE',
         \SplFileObject::READ_AHEAD => 'READ_AHEAD',
         \SplFileObject::SKIP_EMPTY => 'SKIP_EMPTY',
         \SplFileObject::READ_CSV => 'READ_CSV',
-    );
+    ];
 
     public static function castArrayObject(\ArrayObject $c, array $a, Stub $stub, $isNested)
     {
@@ -39,9 +39,9 @@ class SplCaster
 
     public static function castHeap(\Iterator $c, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'heap' => iterator_to_array(clone $c),
-        );
+        ];
 
         return $a;
     }
@@ -52,10 +52,10 @@ class SplCaster
         $mode = $c->getIteratorMode();
         $c->setIteratorMode(\SplDoublyLinkedList::IT_MODE_KEEP | $mode & ~\SplDoublyLinkedList::IT_MODE_DELETE);
 
-        $a += array(
+        $a += [
             $prefix.'mode' => new ConstStub((($mode & \SplDoublyLinkedList::IT_MODE_LIFO) ? 'IT_MODE_LIFO' : 'IT_MODE_FIFO').' | '.(($mode & \SplDoublyLinkedList::IT_MODE_DELETE) ? 'IT_MODE_DELETE' : 'IT_MODE_KEEP'), $mode),
             $prefix.'dllist' => iterator_to_array($c),
-        );
+        ];
         $c->setIteratorMode($mode);
 
         return $a;
@@ -63,7 +63,7 @@ class SplCaster
 
     public static function castFileInfo(\SplFileInfo $c, array $a, Stub $stub, $isNested)
     {
-        static $map = array(
+        static $map = [
             'path' => 'getPath',
             'filename' => 'getFilename',
             'basename' => 'getBasename',
@@ -86,7 +86,7 @@ class SplCaster
             'dir' => 'isDir',
             'link' => 'isLink',
             'linkTarget' => 'getLinkTarget',
-        );
+        ];
 
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -105,7 +105,7 @@ class SplCaster
             $a[$prefix.'perms'] = new ConstStub(sprintf('0%o', $a[$prefix.'perms']), $a[$prefix.'perms']);
         }
 
-        static $mapDate = array('aTime', 'mTime', 'cTime');
+        static $mapDate = ['aTime', 'mTime', 'cTime'];
         foreach ($mapDate as $key) {
             if (isset($a[$prefix.$key])) {
                 $a[$prefix.$key] = new ConstStub(date('Y-m-d H:i:s', $a[$prefix.$key]), $a[$prefix.$key]);
@@ -117,14 +117,14 @@ class SplCaster
 
     public static function castFileObject(\SplFileObject $c, array $a, Stub $stub, $isNested)
     {
-        static $map = array(
+        static $map = [
             'csvControl' => 'getCsvControl',
             'flags' => 'getFlags',
             'maxLineLen' => 'getMaxLineLen',
             'fstat' => 'fstat',
             'eof' => 'eof',
             'key' => 'key',
-        );
+        ];
 
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -136,7 +136,7 @@ class SplCaster
         }
 
         if (isset($a[$prefix.'flags'])) {
-            $flagsArray = array();
+            $flagsArray = [];
             foreach (self::$splFileObjectFlags as $value => $name) {
                 if ($a[$prefix.'flags'] & $value) {
                     $flagsArray[] = $name;
@@ -146,7 +146,7 @@ class SplCaster
         }
 
         if (isset($a[$prefix.'fstat'])) {
-            $a[$prefix.'fstat'] = new CutArrayStub($a[$prefix.'fstat'], array('dev', 'ino', 'nlink', 'rdev', 'blksize', 'blocks'));
+            $a[$prefix.'fstat'] = new CutArrayStub($a[$prefix.'fstat'], ['dev', 'ino', 'nlink', 'rdev', 'blksize', 'blocks']);
         }
 
         return $a;
@@ -154,29 +154,29 @@ class SplCaster
 
     public static function castFixedArray(\SplFixedArray $c, array $a, Stub $stub, $isNested)
     {
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'storage' => $c->toArray(),
-        );
+        ];
 
         return $a;
     }
 
     public static function castObjectStorage(\SplObjectStorage $c, array $a, Stub $stub, $isNested)
     {
-        $storage = array();
+        $storage = [];
         unset($a[Caster::PREFIX_DYNAMIC."\0gcdata"]); // Don't hit https://bugs.php.net/65967
 
         $clone = clone $c;
         foreach ($clone as $obj) {
-            $storage[] = array(
+            $storage[] = [
                 'object' => $obj,
                 'info' => $clone->getInfo(),
-             );
+             ];
         }
 
-        $a += array(
+        $a += [
             Caster::PREFIX_VIRTUAL.'storage' => $storage,
-        );
+        ];
 
         return $a;
     }
@@ -199,10 +199,10 @@ class SplCaster
             $a = Caster::castObject($c, $class);
             $c->setFlags($flags);
         }
-        $a += array(
+        $a += [
             $prefix.'flag::STD_PROP_LIST' => (bool) ($flags & \ArrayObject::STD_PROP_LIST),
             $prefix.'flag::ARRAY_AS_PROPS' => (bool) ($flags & \ArrayObject::ARRAY_AS_PROPS),
-        );
+        ];
         if ($c instanceof \ArrayObject) {
             $a[$prefix.'iteratorClass'] = new ClassStub($c->getIteratorClass());
         }
diff --git a/src/Symfony/Component/VarDumper/Caster/StubCaster.php b/src/Symfony/Component/VarDumper/Caster/StubCaster.php
index b0bf5dc80d..9927d42610 100644
--- a/src/Symfony/Component/VarDumper/Caster/StubCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/StubCaster.php
@@ -35,7 +35,7 @@ class StubCaster
                 $stub->class = Stub::STRING_BINARY;
             }
 
-            $a = array();
+            $a = [];
         }
 
         return $a;
@@ -51,7 +51,7 @@ class StubCaster
         if ($isNested) {
             $stub->cut += \count($a);
 
-            return array();
+            return [];
         }
 
         return $a;
@@ -66,7 +66,7 @@ class StubCaster
             $stub->cut = $c->cut;
             $stub->attr = $c->attr;
 
-            $a = array();
+            $a = [];
 
             if ($c->value) {
                 foreach (array_keys($c->value) as $k) {
diff --git a/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php b/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
index 5d9decb67a..ae7134f55b 100644
--- a/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/SymfonyCaster.php
@@ -16,14 +16,14 @@ use Symfony\Component\VarDumper\Cloner\Stub;
 
 class SymfonyCaster
 {
-    private static $requestGetters = array(
+    private static $requestGetters = [
         'pathInfo' => 'getPathInfo',
         'requestUri' => 'getRequestUri',
         'baseUrl' => 'getBaseUrl',
         'basePath' => 'getBasePath',
         'method' => 'getMethod',
         'format' => 'getRequestFormat',
-    );
+    ];
 
     public static function castRequest(Request $request, array $a, Stub $stub, $isNested)
     {
diff --git a/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php b/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
index 19b26e69c6..3ae9ec0ba1 100644
--- a/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/XmlReaderCaster.php
@@ -19,7 +19,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class XmlReaderCaster
 {
-    private static $nodeTypes = array(
+    private static $nodeTypes = [
         \XMLReader::NONE => 'NONE',
         \XMLReader::ELEMENT => 'ELEMENT',
         \XMLReader::ATTRIBUTE => 'ATTRIBUTE',
@@ -38,12 +38,12 @@ class XmlReaderCaster
         \XMLReader::END_ELEMENT => 'END_ELEMENT',
         \XMLReader::END_ENTITY => 'END_ENTITY',
         \XMLReader::XML_DECLARATION => 'XML_DECLARATION',
-    );
+    ];
 
     public static function castXmlReader(\XMLReader $reader, array $a, Stub $stub, $isNested)
     {
         $props = Caster::PREFIX_VIRTUAL.'parserProperties';
-        $info = array(
+        $info = [
             'localName' => $reader->localName,
             'prefix' => $reader->prefix,
             'nodeType' => new ConstStub(self::$nodeTypes[$reader->nodeType], $reader->nodeType),
@@ -55,20 +55,20 @@ class XmlReaderCaster
             'value' => $reader->value,
             'namespaceURI' => $reader->namespaceURI,
             'baseURI' => $reader->baseURI ? new LinkStub($reader->baseURI) : $reader->baseURI,
-            $props => array(
+            $props => [
                 'LOADDTD' => $reader->getParserProperty(\XMLReader::LOADDTD),
                 'DEFAULTATTRS' => $reader->getParserProperty(\XMLReader::DEFAULTATTRS),
                 'VALIDATE' => $reader->getParserProperty(\XMLReader::VALIDATE),
                 'SUBST_ENTITIES' => $reader->getParserProperty(\XMLReader::SUBST_ENTITIES),
-            ),
-        );
+            ],
+        ];
 
-        if ($info[$props] = Caster::filter($info[$props], Caster::EXCLUDE_EMPTY, array(), $count)) {
+        if ($info[$props] = Caster::filter($info[$props], Caster::EXCLUDE_EMPTY, [], $count)) {
             $info[$props] = new EnumStub($info[$props]);
             $info[$props]->cut = $count;
         }
 
-        $info = Caster::filter($info, Caster::EXCLUDE_EMPTY, array(), $count);
+        $info = Caster::filter($info, Caster::EXCLUDE_EMPTY, [], $count);
         // +2 because hasValue and hasAttributes are always filtered
         $stub->cut += $count + 2;
 
diff --git a/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php b/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
index 5d0207ee81..117138c784 100644
--- a/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/XmlResourceCaster.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarDumper\Cloner\Stub;
  */
 class XmlResourceCaster
 {
-    private static $xmlErrors = array(
+    private static $xmlErrors = [
         XML_ERROR_NONE => 'XML_ERROR_NONE',
         XML_ERROR_NO_MEMORY => 'XML_ERROR_NO_MEMORY',
         XML_ERROR_SYNTAX => 'XML_ERROR_SYNTAX',
@@ -43,7 +43,7 @@ class XmlResourceCaster
         XML_ERROR_INCORRECT_ENCODING => 'XML_ERROR_INCORRECT_ENCODING',
         XML_ERROR_UNCLOSED_CDATA_SECTION => 'XML_ERROR_UNCLOSED_CDATA_SECTION',
         XML_ERROR_EXTERNAL_ENTITY_HANDLING => 'XML_ERROR_EXTERNAL_ENTITY_HANDLING',
-    );
+    ];
 
     public static function castXml($h, array $a, Stub $stub, $isNested)
     {
diff --git a/src/Symfony/Component/VarDumper/Cloner/Cursor.php b/src/Symfony/Component/VarDumper/Cloner/Cursor.php
index 888f4f2be3..5b0542f6c2 100644
--- a/src/Symfony/Component/VarDumper/Cloner/Cursor.php
+++ b/src/Symfony/Component/VarDumper/Cloner/Cursor.php
@@ -38,6 +38,6 @@ class Cursor
     public $hashLength = 0;
     public $hashCut = 0;
     public $stop = false;
-    public $attr = array();
+    public $attr = [];
     public $skipChildren = false;
 }
diff --git a/src/Symfony/Component/VarDumper/Cloner/Data.php b/src/Symfony/Component/VarDumper/Cloner/Data.php
index 0604a38f55..92a6f41cdd 100644
--- a/src/Symfony/Component/VarDumper/Cloner/Data.php
+++ b/src/Symfony/Component/VarDumper/Cloner/Data.php
@@ -79,7 +79,7 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
             return $item->value;
         }
 
-        $children = $item->position ? $this->data[$item->position] : array();
+        $children = $item->position ? $this->data[$item->position] : [];
 
         foreach ($children as $k => $v) {
             if ($recursive && !($v = $this->getStub($v)) instanceof Stub) {
@@ -123,7 +123,7 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
         if (null !== $data = $this->seek($key)) {
             $item = $this->getStub($data->data[$data->position][$data->key]);
 
-            return $item instanceof Stub || array() === $item ? $data : $item;
+            return $item instanceof Stub || [] === $item ? $data : $item;
         }
     }
 
@@ -225,7 +225,7 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
         if (!($item = $this->getStub($item)) instanceof Stub || !$item->position) {
             return;
         }
-        $keys = array($key);
+        $keys = [$key];
 
         switch ($item->type) {
             case Stub::TYPE_OBJECT:
@@ -261,7 +261,7 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
      */
     public function dump(DumperInterface $dumper)
     {
-        $refs = array(0);
+        $refs = [0];
         $this->dumpItem($dumper, new Cursor(), $refs, $this->data[$this->position][$this->key]);
     }
 
@@ -281,7 +281,7 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
         $firstSeen = true;
 
         if (!$item instanceof Stub) {
-            $cursor->attr = array();
+            $cursor->attr = [];
             $type = \gettype($item);
             if ($item && 'array' === $type) {
                 $item = $this->getStub($item);
@@ -322,10 +322,10 @@ class Data implements \ArrayAccess, \Countable, \IteratorAggregate
                     if ($cut >= 0) {
                         $cut += \count($children);
                     }
-                    $children = array();
+                    $children = [];
                 }
             } else {
-                $children = array();
+                $children = [];
             }
             switch ($item->type) {
                 case Stub::TYPE_STRING:
diff --git a/src/Symfony/Component/VarDumper/Cloner/Stub.php b/src/Symfony/Component/VarDumper/Cloner/Stub.php
index 3b8e60d90e..09e2c76467 100644
--- a/src/Symfony/Component/VarDumper/Cloner/Stub.php
+++ b/src/Symfony/Component/VarDumper/Cloner/Stub.php
@@ -37,14 +37,14 @@ class Stub implements \Serializable
     public $handle = 0;
     public $refCount = 0;
     public $position = 0;
-    public $attr = array();
+    public $attr = [];
 
     /**
      * @internal
      */
     public function serialize()
     {
-        return \serialize(array($this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr));
+        return \serialize([$this->class, $this->position, $this->cut, $this->type, $this->value, $this->handle, $this->refCount, $this->attr]);
     }
 
     /**
diff --git a/src/Symfony/Component/VarDumper/Cloner/VarCloner.php b/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
index e02ff9d2b8..a50adef9f5 100644
--- a/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
+++ b/src/Symfony/Component/VarDumper/Cloner/VarCloner.php
@@ -17,7 +17,7 @@ namespace Symfony\Component\VarDumper\Cloner;
 class VarCloner extends AbstractCloner
 {
     private static $gid;
-    private static $arrayCache = array();
+    private static $arrayCache = [];
 
     /**
      * {@inheritdoc}
@@ -27,19 +27,19 @@ class VarCloner extends AbstractCloner
         $len = 1;                       // Length of $queue
         $pos = 0;                       // Number of cloned items past the minimum depth
         $refsCounter = 0;               // Hard references counter
-        $queue = array(array($var));    // This breadth-first queue is the return value
-        $indexedArrays = array();       // Map of queue indexes that hold numerically indexed arrays
-        $hardRefs = array();            // Map of original zval ids to stub objects
-        $objRefs = array();             // Map of original object handles to their stub object counterpart
-        $resRefs = array();             // Map of original resource handles to their stub object counterpart
-        $values = array();              // Map of stub objects' ids to original values
+        $queue = [[$var]];    // This breadth-first queue is the return value
+        $indexedArrays = [];       // Map of queue indexes that hold numerically indexed arrays
+        $hardRefs = [];            // Map of original zval ids to stub objects
+        $objRefs = [];             // Map of original object handles to their stub object counterpart
+        $resRefs = [];             // Map of original resource handles to their stub object counterpart
+        $values = [];              // Map of stub objects' ids to original values
         $maxItems = $this->maxItems;
         $maxString = $this->maxString;
         $minDepth = $this->minDepth;
         $currentDepth = 0;              // Current tree depth
         $currentDepthFinalIndex = 0;    // Final $queue index for current tree depth
         $minimumDepthReached = 0 === $minDepth; // Becomes true when minimum tree depth has been reached
-        $cookie = (object) array();     // Unique object used to detect hard references
+        $cookie = (object) [];     // Unique object used to detect hard references
         $a = null;                      // Array cast for nested structures
         $stub = null;                   // Stub capturing the main properties of an original item value
                                         // or null if the original value is used directly
@@ -68,7 +68,7 @@ class VarCloner extends AbstractCloner
                     if (\is_int($k)) {
                         continue;
                     }
-                    foreach (array($k => true) as $gk => $gv) {
+                    foreach ([$k => true] as $gk => $gv) {
                     }
                     if ($gk !== $k) {
                         $fromObjCast = true;
@@ -157,7 +157,7 @@ class VarCloner extends AbstractCloner
                             // Happens with copies of $GLOBALS
                             if (isset($v[$gid])) {
                                 unset($v[$gid]);
-                                $a = array();
+                                $a = [];
                                 foreach ($v as $gk => &$gv) {
                                     $a[$gk] = &$gv;
                                 }
@@ -247,12 +247,12 @@ class VarCloner extends AbstractCloner
 
                 if ($arrayStub === $stub) {
                     if ($arrayStub->cut) {
-                        $stub = array($arrayStub->cut, $arrayStub->class => $arrayStub->position);
+                        $stub = [$arrayStub->cut, $arrayStub->class => $arrayStub->position];
                         $arrayStub->cut = 0;
                     } elseif (isset(self::$arrayCache[$arrayStub->class][$arrayStub->position])) {
                         $stub = self::$arrayCache[$arrayStub->class][$arrayStub->position];
                     } else {
-                        self::$arrayCache[$arrayStub->class][$arrayStub->position] = $stub = array($arrayStub->class => $arrayStub->position);
+                        self::$arrayCache[$arrayStub->class][$arrayStub->position] = $stub = [$arrayStub->class => $arrayStub->position];
                     }
                 }
 
@@ -266,10 +266,10 @@ class VarCloner extends AbstractCloner
             if ($fromObjCast) {
                 $fromObjCast = false;
                 $refs = $vals;
-                $vals = array();
+                $vals = [];
                 $j = -1;
                 foreach ($queue[$i] as $k => $v) {
-                    foreach (array($k => true) as $gk => $gv) {
+                    foreach ([$k => true] as $gk => $gv) {
                     }
                     if ($gk !== $k) {
                         $vals = (object) $vals;
diff --git a/src/Symfony/Component/VarDumper/Command/Descriptor/HtmlDescriptor.php b/src/Symfony/Component/VarDumper/Command/Descriptor/HtmlDescriptor.php
index c7eeeb2ae2..35a203b000 100644
--- a/src/Symfony/Component/VarDumper/Command/Descriptor/HtmlDescriptor.php
+++ b/src/Symfony/Component/VarDumper/Command/Descriptor/HtmlDescriptor.php
@@ -44,7 +44,7 @@ class HtmlDescriptor implements DumpDescriptorInterface
         $title = '-';
         if (isset($context['request'])) {
             $request = $context['request'];
-            $controller = "<span class='dumped-tag'>{$this->dumper->dump($request['controller'], true, array('maxDepth' => 0))}</span>";
+            $controller = "<span class='dumped-tag'>{$this->dumper->dump($request['controller'], true, ['maxDepth' => 0])}</span>";
             $title = sprintf('<code>%s</code> <a href="%s">%s</a>', $request['method'], $uri = $request['uri'], $uri);
             $dedupIdentifier = $request['identifier'];
         } elseif (isset($context['cli'])) {
@@ -65,10 +65,10 @@ class HtmlDescriptor implements DumpDescriptorInterface
         }
 
         $isoDate = $this->extractDate($context, 'c');
-        $tags = array_filter(array(
+        $tags = array_filter([
             'controller' => $controller ?? null,
             'project dir' => $projectDir ?? null,
-        ));
+        ]);
 
         $output->writeln(<<<HTML
 <article data-dedup-id="$dedupIdentifier">
diff --git a/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php b/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
index 1619450523..eb807e35e8 100644
--- a/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
+++ b/src/Symfony/Component/VarDumper/Command/ServerDumpCommand.php
@@ -41,13 +41,13 @@ class ServerDumpCommand extends Command
     /** @var DumpDescriptorInterface[] */
     private $descriptors;
 
-    public function __construct(DumpServer $server, array $descriptors = array())
+    public function __construct(DumpServer $server, array $descriptors = [])
     {
         $this->server = $server;
-        $this->descriptors = $descriptors + array(
+        $this->descriptors = $descriptors + [
             'cli' => new CliDescriptor(new CliDumper()),
             'html' => new HtmlDescriptor(new HtmlDumper()),
-        );
+        ];
 
         parent::__construct();
     }
diff --git a/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php b/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
index 37140b715d..5bd652bfef 100644
--- a/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php
@@ -73,7 +73,7 @@ abstract class AbstractDumper implements DataDumperInterface, DumperInterface
                 $output = fopen($output, 'wb');
             }
             $this->outputStream = $output;
-            $this->lineDumper = array($this, 'echoLine');
+            $this->lineDumper = [$this, 'echoLine'];
         }
 
         return $prev;
diff --git a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
index 65adfdecf8..418f044818 100644
--- a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
@@ -26,7 +26,7 @@ class CliDumper extends AbstractDumper
 
     protected $colors;
     protected $maxStringWidth = 0;
-    protected $styles = array(
+    protected $styles = [
         // See http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
         'default' => '38;5;208',
         'num' => '1;38;5;38',
@@ -40,17 +40,17 @@ class CliDumper extends AbstractDumper
         'meta' => '38;5;170',
         'key' => '38;5;113',
         'index' => '38;5;38',
-    );
+    ];
 
     protected static $controlCharsRx = '/[\x00-\x1F\x7F]+/';
-    protected static $controlCharsMap = array(
+    protected static $controlCharsMap = [
         "\t" => '\t',
         "\n" => '\n',
         "\v" => '\v',
         "\f" => '\f',
         "\r" => '\r',
         "\033" => '\e',
-    );
+    ];
 
     protected $collapseNextHash = false;
     protected $expandNextHash = false;
@@ -70,7 +70,7 @@ class CliDumper extends AbstractDumper
 
         if ('\\' === \DIRECTORY_SEPARATOR && !$this->isWindowsTrueColor()) {
             // Use only the base 16 xterm colors when using ANSICON or standard Windows 10 CLI
-            $this->setStyles(array(
+            $this->setStyles([
                 'default' => '31',
                 'num' => '1;34',
                 'const' => '1;31',
@@ -80,7 +80,7 @@ class CliDumper extends AbstractDumper
                 'meta' => '35',
                 'key' => '32',
                 'index' => '34',
-            ));
+            ]);
         }
 
         $this->displayOptions['fileLinkFormat'] = ini_get('xdebug.file_link_format') ?: get_cfg_var('xdebug.file_link_format') ?: 'file://%f';
@@ -170,7 +170,7 @@ class CliDumper extends AbstractDumper
                 break;
 
             default:
-                $attr += array('value' => $this->utf8Encode($value));
+                $attr += ['value' => $this->utf8Encode($value)];
                 $value = $this->utf8Encode($type);
                 break;
         }
@@ -195,10 +195,10 @@ class CliDumper extends AbstractDumper
             $this->line .= '""';
             $this->endValue($cursor);
         } else {
-            $attr += array(
+            $attr += [
                 'length' => 0 <= $cut ? mb_strlen($str, 'UTF-8') + $cut : 0,
                 'binary' => $bin,
-            );
+            ];
             $str = explode("\n", $str);
             if (isset($str[1]) && !isset($str[2]) && !isset($str[1][0])) {
                 unset($str[1]);
@@ -290,9 +290,9 @@ class CliDumper extends AbstractDumper
         }
 
         if ($cursor->softRefCount || 0 < $cursor->softRefHandle) {
-            $prefix .= $this->style('ref', (Cursor::HASH_RESOURCE === $type ? '@' : '#').(0 < $cursor->softRefHandle ? $cursor->softRefHandle : $cursor->softRefTo), array('count' => $cursor->softRefCount));
+            $prefix .= $this->style('ref', (Cursor::HASH_RESOURCE === $type ? '@' : '#').(0 < $cursor->softRefHandle ? $cursor->softRefHandle : $cursor->softRefTo), ['count' => $cursor->softRefCount]);
         } elseif ($cursor->hardRefTo && !$cursor->refIndex && $class) {
-            $prefix .= $this->style('ref', '&'.$cursor->hardRefTo, array('count' => $cursor->hardRefCount));
+            $prefix .= $this->style('ref', '&'.$cursor->hardRefTo, ['count' => $cursor->hardRefCount]);
         } elseif (!$hasChild && Cursor::HASH_RESOURCE === $type) {
             $prefix = substr($prefix, 0, -1);
         }
@@ -345,7 +345,7 @@ class CliDumper extends AbstractDumper
             if ($cursor->hashKeyIsBinary) {
                 $key = $this->utf8Encode($key);
             }
-            $attr = array('binary' => $cursor->hashKeyIsBinary);
+            $attr = ['binary' => $cursor->hashKeyIsBinary];
             $bin = $cursor->hashKeyIsBinary ? 'b' : '';
             $style = 'key';
             switch ($cursor->hashType) {
@@ -382,7 +382,7 @@ class CliDumper extends AbstractDumper
                                 $style = 'meta';
                                 if (isset($key[0][1])) {
                                     parse_str(substr($key[0], 1), $attr);
-                                    $attr += array('binary' => $cursor->hashKeyIsBinary);
+                                    $attr += ['binary' => $cursor->hashKeyIsBinary];
                                 }
                                 break;
                             case '*':
@@ -407,13 +407,13 @@ class CliDumper extends AbstractDumper
                         $this->line .= $bin.$this->style($style, $key[1], $attr).(isset($attr['separator']) ? $attr['separator'] : ': ');
                     } else {
                         // This case should not happen
-                        $this->line .= '-'.$bin.'"'.$this->style('private', $key, array('class' => '')).'": ';
+                        $this->line .= '-'.$bin.'"'.$this->style('private', $key, ['class' => '']).'": ';
                     }
                     break;
             }
 
             if ($cursor->hardRefTo) {
-                $this->line .= $this->style('ref', '&'.($cursor->hardRefCount ? $cursor->hardRefTo : ''), array('count' => $cursor->hardRefCount)).' ';
+                $this->line .= $this->style('ref', '&'.($cursor->hardRefCount ? $cursor->hardRefTo : ''), ['count' => $cursor->hardRefCount]).' ';
             }
         }
     }
@@ -427,7 +427,7 @@ class CliDumper extends AbstractDumper
      *
      * @return string The value with style decoration
      */
-    protected function style($style, $value, $attr = array())
+    protected function style($style, $value, $attr = [])
     {
         if (null === $this->colors) {
             $this->colors = $this->supportsColors();
@@ -529,7 +529,7 @@ class CliDumper extends AbstractDumper
             }
         }
 
-        $h = stream_get_meta_data($this->outputStream) + array('wrapper_type' => null);
+        $h = stream_get_meta_data($this->outputStream) + ['wrapper_type' => null];
         $h = 'Output' === $h['stream_type'] && 'PHP' === $h['wrapper_type'] ? fopen('php://stdout', 'wb') : $this->outputStream;
 
         return static::$defaultColors = $this->hasColorSupport($h);
diff --git a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/CliContextProvider.php b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/CliContextProvider.php
index 1f8c0c840c..e7f8ccf17f 100644
--- a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/CliContextProvider.php
+++ b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/CliContextProvider.php
@@ -24,9 +24,9 @@ final class CliContextProvider implements ContextProviderInterface
             return null;
         }
 
-        return array(
+        return [
             'command_line' => $commandLine = implode(' ', $_SERVER['argv']),
             'identifier' => hash('crc32b', $commandLine.$_SERVER['REQUEST_TIME_FLOAT']),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/RequestContextProvider.php b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/RequestContextProvider.php
index 10b1406527..bb3cc863fe 100644
--- a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/RequestContextProvider.php
+++ b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/RequestContextProvider.php
@@ -39,11 +39,11 @@ final class RequestContextProvider implements ContextProviderInterface
 
         $controller = $request->attributes->get('_controller');
 
-        return array(
+        return [
             'uri' => $request->getUri(),
             'method' => $request->getMethod(),
             'controller' => $controller ? $this->cloner->cloneVar($controller) : $controller,
             'identifier' => spl_object_hash($request),
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/SourceContextProvider.php b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/SourceContextProvider.php
index 0c09104117..e43e19f435 100644
--- a/src/Symfony/Component/VarDumper/Dumper/ContextProvider/SourceContextProvider.php
+++ b/src/Symfony/Component/VarDumper/Dumper/ContextProvider/SourceContextProvider.php
@@ -72,7 +72,7 @@ final class SourceContextProvider implements ContextProviderInterface
 
                             if ($src) {
                                 $src = explode("\n", $src);
-                                $fileExcerpt = array();
+                                $fileExcerpt = [];
 
                                 for ($i = max($line - 3, 1), $max = min($line + 3, \count($src)); $i <= $max; ++$i) {
                                     $fileExcerpt[] = '<li'.($i === $line ? ' class="selected"' : '').'><code>'.$this->htmlEncode($src[$i - 1]).'</code></li>';
@@ -93,7 +93,7 @@ final class SourceContextProvider implements ContextProviderInterface
             $name = substr($name, strrpos($name, '/') + 1);
         }
 
-        $context = array('name' => $name, 'file' => $file, 'line' => $line);
+        $context = ['name' => $name, 'file' => $file, 'line' => $line];
         $context['file_excerpt'] = $fileExcerpt;
 
         if (null !== $this->projectDir) {
diff --git a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
index e15a2b644e..03502bbd8f 100644
--- a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
@@ -23,8 +23,8 @@ class HtmlDumper extends CliDumper
 {
     public static $defaultOutput = 'php://output';
 
-    protected static $themes = array(
-        'dark' => array(
+    protected static $themes = [
+        'dark' => [
             'default' => 'background-color:#18171B; color:#FF8400; line-height:1.2em; font:12px Menlo, Monaco, Consolas, monospace; word-wrap: break-word; white-space: pre-wrap; position:relative; z-index:99999; word-break: break-all',
             'num' => 'font-weight:bold; color:#1299DA',
             'const' => 'font-weight:bold',
@@ -39,8 +39,8 @@ class HtmlDumper extends CliDumper
             'index' => 'color:#1299DA',
             'ellipsis' => 'color:#FF8400',
             'ns' => 'user-select:none;',
-        ),
-        'light' => array(
+        ],
+        'light' => [
             'default' => 'background:none; color:#CC7832; line-height:1.2em; font:12px Menlo, Monaco, Consolas, monospace; word-wrap: break-word; white-space: pre-wrap; position:relative; z-index:99999; word-break: break-all',
             'num' => 'font-weight:bold; color:#1299DA',
             'const' => 'font-weight:bold',
@@ -55,8 +55,8 @@ class HtmlDumper extends CliDumper
             'index' => 'color:#1299DA',
             'ellipsis' => 'color:#CC7832',
             'ns' => 'user-select:none;',
-        ),
-    );
+        ],
+    ];
 
     protected $dumpHeader;
     protected $dumpPrefix = '<pre class=sf-dump id=%s data-indent-pad="%s">';
@@ -67,12 +67,12 @@ class HtmlDumper extends CliDumper
     protected $lastDepth = -1;
     protected $styles;
 
-    private $displayOptions = array(
+    private $displayOptions = [
         'maxDepth' => 1,
         'maxStringLength' => 160,
         'fileLinkFormat' => null,
-    );
-    private $extraDisplayOptions = array();
+    ];
+    private $extraDisplayOptions = [];
 
     /**
      * {@inheritdoc}
@@ -139,7 +139,7 @@ class HtmlDumper extends CliDumper
     /**
      * {@inheritdoc}
      */
-    public function dump(Data $data, $output = null, array $extraDisplayOptions = array())
+    public function dump(Data $data, $output = null, array $extraDisplayOptions = [])
     {
         $this->extraDisplayOptions = $extraDisplayOptions;
         $result = parent::dump($data, $output);
@@ -819,7 +819,7 @@ EOHTML
     /**
      * {@inheritdoc}
      */
-    protected function style($style, $value, $attr = array())
+    protected function style($style, $value, $attr = [])
     {
         if ('' === $value) {
             return '';
@@ -919,7 +919,7 @@ EOHTML
         }
 
         if (-1 === $depth) {
-            $args = array('"'.$this->dumpId.'"');
+            $args = ['"'.$this->dumpId.'"'];
             if ($this->extraDisplayOptions) {
                 $args[] = json_encode($this->extraDisplayOptions, JSON_FORCE_OBJECT);
             }
@@ -941,7 +941,7 @@ EOHTML
         $options = $this->extraDisplayOptions + $this->displayOptions;
 
         if ($fmt = $options['fileLinkFormat']) {
-            return \is_string($fmt) ? strtr($fmt, array('%f' => $file, '%l' => $line)) : $fmt->format($file, $line);
+            return \is_string($fmt) ? strtr($fmt, ['%f' => $file, '%l' => $line]) : $fmt->format($file, $line);
         }
 
         return false;
diff --git a/src/Symfony/Component/VarDumper/Dumper/ServerDumper.php b/src/Symfony/Component/VarDumper/Dumper/ServerDumper.php
index 32e1f124cc..94795bf6d6 100644
--- a/src/Symfony/Component/VarDumper/Dumper/ServerDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/ServerDumper.php
@@ -30,7 +30,7 @@ class ServerDumper implements DataDumperInterface
      * @param DataDumperInterface|null   $wrappedDumper    A wrapped instance used whenever we failed contacting the server
      * @param ContextProviderInterface[] $contextProviders Context providers indexed by context name
      */
-    public function __construct(string $host, DataDumperInterface $wrappedDumper = null, array $contextProviders = array())
+    public function __construct(string $host, DataDumperInterface $wrappedDumper = null, array $contextProviders = [])
     {
         $this->connection = new Connection($host, $contextProviders);
         $this->wrappedDumper = $wrappedDumper;
diff --git a/src/Symfony/Component/VarDumper/Server/Connection.php b/src/Symfony/Component/VarDumper/Server/Connection.php
index d447b0a98e..853bf00c22 100644
--- a/src/Symfony/Component/VarDumper/Server/Connection.php
+++ b/src/Symfony/Component/VarDumper/Server/Connection.php
@@ -29,7 +29,7 @@ class Connection
      * @param string                     $host             The server host
      * @param ContextProviderInterface[] $contextProviders Context providers indexed by context name
      */
-    public function __construct(string $host, array $contextProviders = array())
+    public function __construct(string $host, array $contextProviders = [])
     {
         if (false === strpos($host, '://')) {
             $host = 'tcp://'.$host;
@@ -51,14 +51,14 @@ class Connection
             return false;
         }
 
-        $context = array('timestamp' => microtime(true));
+        $context = ['timestamp' => microtime(true)];
         foreach ($this->contextProviders as $name => $provider) {
             $context[$name] = $provider->getContext();
         }
         $context = array_filter($context);
-        $encodedPayload = base64_encode(serialize(array($data, $context)))."\n";
+        $encodedPayload = base64_encode(serialize([$data, $context]))."\n";
 
-        set_error_handler(array(self::class, 'nullErrorHandler'));
+        set_error_handler([self::class, 'nullErrorHandler']);
         try {
             if (-1 !== stream_socket_sendto($this->socket, $encodedPayload)) {
                 return true;
@@ -85,7 +85,7 @@ class Connection
 
     private function createSocket()
     {
-        set_error_handler(array(self::class, 'nullErrorHandler'));
+        set_error_handler([self::class, 'nullErrorHandler']);
         try {
             return stream_socket_client($this->host, $errno, $errstr, 3, STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT);
         } finally {
diff --git a/src/Symfony/Component/VarDumper/Server/DumpServer.php b/src/Symfony/Component/VarDumper/Server/DumpServer.php
index 6f79ca4c19..ad920bd4fc 100644
--- a/src/Symfony/Component/VarDumper/Server/DumpServer.php
+++ b/src/Symfony/Component/VarDumper/Server/DumpServer.php
@@ -52,12 +52,12 @@ class DumpServer
         }
 
         foreach ($this->getMessages() as $clientId => $message) {
-            $payload = @unserialize(base64_decode($message), array('allowed_classes' => array(Data::class, Stub::class)));
+            $payload = @unserialize(base64_decode($message), ['allowed_classes' => [Data::class, Stub::class]]);
 
             // Impossible to decode the message, give up.
             if (false === $payload) {
                 if ($this->logger) {
-                    $this->logger->warning('Unable to decode a message from {clientId} client.', array('clientId' => $clientId));
+                    $this->logger->warning('Unable to decode a message from {clientId} client.', ['clientId' => $clientId]);
                 }
 
                 continue;
@@ -65,7 +65,7 @@ class DumpServer
 
             if (!\is_array($payload) || \count($payload) < 2 || !$payload[0] instanceof Data || !\is_array($payload[1])) {
                 if ($this->logger) {
-                    $this->logger->warning('Invalid payload from {clientId} client. Expected an array of two elements (Data $data, array $context)', array('clientId' => $clientId));
+                    $this->logger->warning('Invalid payload from {clientId} client. Expected an array of two elements (Data $data, array $context)', ['clientId' => $clientId]);
                 }
 
                 continue;
@@ -84,8 +84,8 @@ class DumpServer
 
     private function getMessages(): iterable
     {
-        $sockets = array((int) $this->socket => $this->socket);
-        $write = array();
+        $sockets = [(int) $this->socket => $this->socket];
+        $write = [];
 
         while (true) {
             $read = $sockets;
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/CasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/CasterTest.php
index 1dacce59bc..2c2189c8b5 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/CasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/CasterTest.php
@@ -22,7 +22,7 @@ class CasterTest extends TestCase
 {
     use VarDumperTestTrait;
 
-    private $referenceArray = array(
+    private $referenceArray = [
         'null' => null,
         'empty' => false,
         'public' => 'pub',
@@ -30,7 +30,7 @@ class CasterTest extends TestCase
         "\0+\0dynamic" => 'dyn',
         "\0*\0protected" => 'prot',
         "\0Foo\0private" => 'priv',
-    );
+    ];
 
     /**
      * @dataProvider provideFilter
@@ -48,107 +48,107 @@ class CasterTest extends TestCase
 
     public function provideFilter()
     {
-        return array(
-            array(
+        return [
+            [
                 0,
-                array(),
-            ),
-            array(
+                [],
+            ],
+            [
                 Caster::EXCLUDE_PUBLIC,
-                array(
+                [
                     'null' => null,
                     'empty' => false,
                     'public' => 'pub',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_NULL,
-                array(
+                [
                     'null' => null,
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_EMPTY,
-                array(
+                [
                     'null' => null,
                     'empty' => false,
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_VIRTUAL,
-                array(
+                [
                     "\0~\0virtual" => 'virt',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_DYNAMIC,
-                array(
+                [
                     "\0+\0dynamic" => 'dyn',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_PROTECTED,
-                array(
+                [
                     "\0*\0protected" => 'prot',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_PRIVATE,
-                array(
+                [
                     "\0Foo\0private" => 'priv',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_VERBOSE,
-                array(
+                [
                     'public' => 'pub',
                     "\0*\0protected" => 'prot',
-                ),
-                array('public', "\0*\0protected"),
-            ),
-            array(
+                ],
+                ['public', "\0*\0protected"],
+            ],
+            [
                 Caster::EXCLUDE_NOT_IMPORTANT,
-                array(
+                [
                     'null' => null,
                     'empty' => false,
                     "\0~\0virtual" => 'virt',
                     "\0+\0dynamic" => 'dyn',
                     "\0Foo\0private" => 'priv',
-                ),
-                array('public', "\0*\0protected"),
-            ),
-            array(
+                ],
+                ['public', "\0*\0protected"],
+            ],
+            [
                 Caster::EXCLUDE_VIRTUAL | Caster::EXCLUDE_DYNAMIC,
-                array(
+                [
                     "\0~\0virtual" => 'virt',
                     "\0+\0dynamic" => 'dyn',
-                ),
-            ),
-            array(
+                ],
+            ],
+            [
                 Caster::EXCLUDE_NOT_IMPORTANT | Caster::EXCLUDE_VERBOSE,
                 $this->referenceArray,
-                array('public', "\0*\0protected"),
-            ),
-            array(
+                ['public', "\0*\0protected"],
+            ],
+            [
                 Caster::EXCLUDE_NOT_IMPORTANT | Caster::EXCLUDE_EMPTY,
-                array(
+                [
                     'null' => null,
                     'empty' => false,
                     "\0~\0virtual" => 'virt',
                     "\0+\0dynamic" => 'dyn',
                     "\0*\0protected" => 'prot',
                     "\0Foo\0private" => 'priv',
-                ),
-                array('public', 'empty'),
-            ),
-            array(
+                ],
+                ['public', 'empty'],
+            ],
+            [
                 Caster::EXCLUDE_VERBOSE | Caster::EXCLUDE_EMPTY | Caster::EXCLUDE_STRICT,
-                array(
+                [
                     'empty' => false,
-                ),
-                array('public', 'empty'),
-            ),
-        );
+                ],
+                ['public', 'empty'],
+            ],
+        ];
     }
 
     public function testAnonymousClass()
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php
index d27968667d..dae13efe56 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/DateCasterTest.php
@@ -47,7 +47,7 @@ EODUMP;
     {
         $stub = new Stub();
         $date = new \DateTime($time, new \DateTimeZone($timezone));
-        $cast = DateCaster::castDateTime($date, array('foo' => 'bar'), $stub, false, 0);
+        $cast = DateCaster::castDateTime($date, ['foo' => 'bar'], $stub, false, 0);
 
         $xDump = <<<EODUMP
 array:1 [
@@ -75,18 +75,18 @@ EODUMP;
 
     public function provideDateTimes()
     {
-        return array(
-            array('2017-04-30 00:00:00.000000', 'Europe/Zurich', '2017-04-30 00:00:00.0 Europe/Zurich (+02:00)', 1493503200, 'Sunday, April 30, 2017%Afrom now%ADST On'),
-            array('2017-12-31 00:00:00.000000', 'Europe/Zurich', '2017-12-31 00:00:00.0 Europe/Zurich (+01:00)', 1514674800, 'Sunday, December 31, 2017%Afrom now%ADST Off'),
-            array('2017-04-30 00:00:00.000000', '+02:00', '2017-04-30 00:00:00.0 +02:00', 1493503200, 'Sunday, April 30, 2017%Afrom now'),
+        return [
+            ['2017-04-30 00:00:00.000000', 'Europe/Zurich', '2017-04-30 00:00:00.0 Europe/Zurich (+02:00)', 1493503200, 'Sunday, April 30, 2017%Afrom now%ADST On'],
+            ['2017-12-31 00:00:00.000000', 'Europe/Zurich', '2017-12-31 00:00:00.0 Europe/Zurich (+01:00)', 1514674800, 'Sunday, December 31, 2017%Afrom now%ADST Off'],
+            ['2017-04-30 00:00:00.000000', '+02:00', '2017-04-30 00:00:00.0 +02:00', 1493503200, 'Sunday, April 30, 2017%Afrom now'],
 
-            array('2017-04-30 00:00:00.100000', '+00:00', '2017-04-30 00:00:00.100 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-            array('2017-04-30 00:00:00.120000', '+00:00', '2017-04-30 00:00:00.120 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-            array('2017-04-30 00:00:00.123000', '+00:00', '2017-04-30 00:00:00.123 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-            array('2017-04-30 00:00:00.123400', '+00:00', '2017-04-30 00:00:00.123400 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-            array('2017-04-30 00:00:00.123450', '+00:00', '2017-04-30 00:00:00.123450 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-            array('2017-04-30 00:00:00.123456', '+00:00', '2017-04-30 00:00:00.123456 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'),
-        );
+            ['2017-04-30 00:00:00.100000', '+00:00', '2017-04-30 00:00:00.100 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+            ['2017-04-30 00:00:00.120000', '+00:00', '2017-04-30 00:00:00.120 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+            ['2017-04-30 00:00:00.123000', '+00:00', '2017-04-30 00:00:00.123 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+            ['2017-04-30 00:00:00.123400', '+00:00', '2017-04-30 00:00:00.123400 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+            ['2017-04-30 00:00:00.123450', '+00:00', '2017-04-30 00:00:00.123450 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+            ['2017-04-30 00:00:00.123456', '+00:00', '2017-04-30 00:00:00.123456 +00:00', 1493510400, 'Sunday, April 30, 2017%Afrom now'],
+        ];
     }
 
     /**
@@ -141,7 +141,7 @@ EODUMP;
         $interval = $this->createInterval($intervalSpec, $ms, $invert);
         $stub = new Stub();
 
-        $cast = DateCaster::castInterval($interval, array('foo' => 'bar'), $stub, false, Caster::EXCLUDE_VERBOSE);
+        $cast = DateCaster::castInterval($interval, ['foo' => 'bar'], $stub, false, Caster::EXCLUDE_VERBOSE);
 
         $xDump = <<<EODUMP
 array:1 [
@@ -173,35 +173,35 @@ EODUMP;
 
     public function provideIntervals()
     {
-        return array(
-            array('PT0S', 0, 0, '0s', '0s'),
-            array('PT0S', 0.1, 0, '+ 00:00:00.100', '%is'),
-            array('PT1S', 0, 0, '+ 00:00:01.0', '%is'),
-            array('PT2M', 0, 0, '+ 00:02:00.0', '%is'),
-            array('PT3H', 0, 0, '+ 03:00:00.0', '%ss'),
-            array('P4D', 0, 0, '+ 4d', '%ss'),
-            array('P5M', 0, 0, '+ 5m', null),
-            array('P6Y', 0, 0, '+ 6y', null),
-            array('P1Y2M3DT4H5M6S', 0, 0, '+ 1y 2m 3d 04:05:06.0', null),
-            array('PT1M60S', 0, 0, '+ 00:02:00.0', null),
-            array('PT1H60M', 0, 0, '+ 02:00:00.0', null),
-            array('P1DT24H', 0, 0, '+ 2d', null),
-            array('P1M32D', 0, 0, '+ 1m 32d', null),
+        return [
+            ['PT0S', 0, 0, '0s', '0s'],
+            ['PT0S', 0.1, 0, '+ 00:00:00.100', '%is'],
+            ['PT1S', 0, 0, '+ 00:00:01.0', '%is'],
+            ['PT2M', 0, 0, '+ 00:02:00.0', '%is'],
+            ['PT3H', 0, 0, '+ 03:00:00.0', '%ss'],
+            ['P4D', 0, 0, '+ 4d', '%ss'],
+            ['P5M', 0, 0, '+ 5m', null],
+            ['P6Y', 0, 0, '+ 6y', null],
+            ['P1Y2M3DT4H5M6S', 0, 0, '+ 1y 2m 3d 04:05:06.0', null],
+            ['PT1M60S', 0, 0, '+ 00:02:00.0', null],
+            ['PT1H60M', 0, 0, '+ 02:00:00.0', null],
+            ['P1DT24H', 0, 0, '+ 2d', null],
+            ['P1M32D', 0, 0, '+ 1m 32d', null],
 
-            array('PT0S', 0, 1, '0s', '0s'),
-            array('PT0S', 0.1, 1, '- 00:00:00.100', '%is'),
-            array('PT1S', 0, 1, '- 00:00:01.0', '%is'),
-            array('PT2M', 0, 1, '- 00:02:00.0', '%is'),
-            array('PT3H', 0, 1, '- 03:00:00.0', '%ss'),
-            array('P4D', 0, 1, '- 4d', '%ss'),
-            array('P5M', 0, 1, '- 5m', null),
-            array('P6Y', 0, 1, '- 6y', null),
-            array('P1Y2M3DT4H5M6S', 0, 1, '- 1y 2m 3d 04:05:06.0', null),
-            array('PT1M60S', 0, 1, '- 00:02:00.0', null),
-            array('PT1H60M', 0, 1, '- 02:00:00.0', null),
-            array('P1DT24H', 0, 1, '- 2d', null),
-            array('P1M32D', 0, 1, '- 1m 32d', null),
-        );
+            ['PT0S', 0, 1, '0s', '0s'],
+            ['PT0S', 0.1, 1, '- 00:00:00.100', '%is'],
+            ['PT1S', 0, 1, '- 00:00:01.0', '%is'],
+            ['PT2M', 0, 1, '- 00:02:00.0', '%is'],
+            ['PT3H', 0, 1, '- 03:00:00.0', '%ss'],
+            ['P4D', 0, 1, '- 4d', '%ss'],
+            ['P5M', 0, 1, '- 5m', null],
+            ['P6Y', 0, 1, '- 6y', null],
+            ['P1Y2M3DT4H5M6S', 0, 1, '- 1y 2m 3d 04:05:06.0', null],
+            ['PT1M60S', 0, 1, '- 00:02:00.0', null],
+            ['PT1H60M', 0, 1, '- 02:00:00.0', null],
+            ['P1DT24H', 0, 1, '- 2d', null],
+            ['P1M32D', 0, 1, '- 1m 32d', null],
+        ];
     }
 
     /**
@@ -244,7 +244,7 @@ EODUMP;
         $timezone = new \DateTimeZone($timezone);
         $stub = new Stub();
 
-        $cast = DateCaster::castTimeZone($timezone, array('foo' => 'bar'), $stub, false, Caster::EXCLUDE_VERBOSE);
+        $cast = DateCaster::castTimeZone($timezone, ['foo' => 'bar'], $stub, false, Caster::EXCLUDE_VERBOSE);
 
         $xDump = <<<EODUMP
 array:1 [
@@ -274,27 +274,27 @@ EODUMP;
     {
         $xRegion = \extension_loaded('intl') ? '%s' : '';
 
-        return array(
+        return [
             // type 1 (UTC offset)
-            array('-12:00', '-12:00', ''),
-            array('+00:00', '+00:00', ''),
-            array('+14:00', '+14:00', ''),
+            ['-12:00', '-12:00', ''],
+            ['+00:00', '+00:00', ''],
+            ['+14:00', '+14:00', ''],
 
             // type 2 (timezone abbreviation)
-            array('GMT', '+00:00', ''),
-            array('a', '+01:00', ''),
-            array('b', '+02:00', ''),
-            array('z', '+00:00', ''),
+            ['GMT', '+00:00', ''],
+            ['a', '+01:00', ''],
+            ['b', '+02:00', ''],
+            ['z', '+00:00', ''],
 
             // type 3 (timezone identifier)
-            array('Africa/Tunis', 'Africa/Tunis (%s:00)', $xRegion),
-            array('America/Panama', 'America/Panama (%s:00)', $xRegion),
-            array('Asia/Jerusalem', 'Asia/Jerusalem (%s:00)', $xRegion),
-            array('Atlantic/Canary', 'Atlantic/Canary (%s:00)', $xRegion),
-            array('Australia/Perth', 'Australia/Perth (%s:00)', $xRegion),
-            array('Europe/Zurich', 'Europe/Zurich (%s:00)', $xRegion),
-            array('Pacific/Tahiti', 'Pacific/Tahiti (%s:00)', $xRegion),
-        );
+            ['Africa/Tunis', 'Africa/Tunis (%s:00)', $xRegion],
+            ['America/Panama', 'America/Panama (%s:00)', $xRegion],
+            ['Asia/Jerusalem', 'Asia/Jerusalem (%s:00)', $xRegion],
+            ['Atlantic/Canary', 'Atlantic/Canary (%s:00)', $xRegion],
+            ['Australia/Perth', 'Australia/Perth (%s:00)', $xRegion],
+            ['Europe/Zurich', 'Europe/Zurich (%s:00)', $xRegion],
+            ['Pacific/Tahiti', 'Pacific/Tahiti (%s:00)', $xRegion],
+        ];
     }
 
     /**
@@ -321,7 +321,7 @@ EODUMP;
         $p = new \DatePeriod(new \DateTime($start), new \DateInterval($interval), \is_int($end) ? $end : new \DateTime($end), $options);
         $stub = new Stub();
 
-        $cast = DateCaster::castPeriod($p, array(), $stub, false, 0);
+        $cast = DateCaster::castPeriod($p, [], $stub, false, 0);
 
         $xDump = <<<EODUMP
 array:1 [
@@ -349,28 +349,28 @@ EODUMP;
 
     public function providePeriods()
     {
-        $periods = array(
-            array('2017-01-01', 'P1D', '2017-01-03', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-03 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02'),
-            array('2017-01-01', 'P1D', 1, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01%a2) 2017-01-02'),
+        $periods = [
+            ['2017-01-01', 'P1D', '2017-01-03', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-03 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02'],
+            ['2017-01-01', 'P1D', 1, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01%a2) 2017-01-02'],
 
-            array('2017-01-01', 'P1D', '2017-01-04', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-04 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03'),
-            array('2017-01-01', 'P1D', 2, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 3 time/s', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03'),
+            ['2017-01-01', 'P1D', '2017-01-04', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-04 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03'],
+            ['2017-01-01', 'P1D', 2, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 3 time/s', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03'],
 
-            array('2017-01-01', 'P1D', '2017-01-05', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-05 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02%a1 more'),
-            array('2017-01-01', 'P1D', 3, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 4 time/s', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03%a1 more'),
+            ['2017-01-01', 'P1D', '2017-01-05', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-05 00:00:00.0', '1) 2017-01-01%a2) 2017-01-02%a1 more'],
+            ['2017-01-01', 'P1D', 3, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 4 time/s', '1) 2017-01-01%a2) 2017-01-02%a3) 2017-01-03%a1 more'],
 
-            array('2017-01-01', 'P1D', '2017-01-21', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-21 00:00:00.0', '1) 2017-01-01%a17 more'),
-            array('2017-01-01', 'P1D', 19, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 20 time/s', '1) 2017-01-01%a17 more'),
+            ['2017-01-01', 'P1D', '2017-01-21', 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) to 2017-01-21 00:00:00.0', '1) 2017-01-01%a17 more'],
+            ['2017-01-01', 'P1D', 19, 0, 'every + 1d, from 2017-01-01 00:00:00.0 (included) recurring 20 time/s', '1) 2017-01-01%a17 more'],
 
-            array('2017-01-01 01:00:00', 'P1D', '2017-01-03 01:00:00', 0, 'every + 1d, from 2017-01-01 01:00:00.0 (included) to 2017-01-03 01:00:00.0', '1) 2017-01-01 01:00:00.0%a2) 2017-01-02 01:00:00.0'),
-            array('2017-01-01 01:00:00', 'P1D', 1, 0, 'every + 1d, from 2017-01-01 01:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01 01:00:00.0%a2) 2017-01-02 01:00:00.0'),
+            ['2017-01-01 01:00:00', 'P1D', '2017-01-03 01:00:00', 0, 'every + 1d, from 2017-01-01 01:00:00.0 (included) to 2017-01-03 01:00:00.0', '1) 2017-01-01 01:00:00.0%a2) 2017-01-02 01:00:00.0'],
+            ['2017-01-01 01:00:00', 'P1D', 1, 0, 'every + 1d, from 2017-01-01 01:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01 01:00:00.0%a2) 2017-01-02 01:00:00.0'],
 
-            array('2017-01-01', 'P1DT1H', '2017-01-03', 0, 'every + 1d 01:00:00.0, from 2017-01-01 00:00:00.0 (included) to 2017-01-03 00:00:00.0', '1) 2017-01-01 00:00:00.0%a2) 2017-01-02 01:00:00.0'),
-            array('2017-01-01', 'P1DT1H', 1, 0, 'every + 1d 01:00:00.0, from 2017-01-01 00:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01 00:00:00.0%a2) 2017-01-02 01:00:00.0'),
+            ['2017-01-01', 'P1DT1H', '2017-01-03', 0, 'every + 1d 01:00:00.0, from 2017-01-01 00:00:00.0 (included) to 2017-01-03 00:00:00.0', '1) 2017-01-01 00:00:00.0%a2) 2017-01-02 01:00:00.0'],
+            ['2017-01-01', 'P1DT1H', 1, 0, 'every + 1d 01:00:00.0, from 2017-01-01 00:00:00.0 (included) recurring 2 time/s', '1) 2017-01-01 00:00:00.0%a2) 2017-01-02 01:00:00.0'],
 
-            array('2017-01-01', 'P1D', '2017-01-04', \DatePeriod::EXCLUDE_START_DATE, 'every + 1d, from 2017-01-01 00:00:00.0 (excluded) to 2017-01-04 00:00:00.0', '1) 2017-01-02%a2) 2017-01-03'),
-            array('2017-01-01', 'P1D', 2, \DatePeriod::EXCLUDE_START_DATE, 'every + 1d, from 2017-01-01 00:00:00.0 (excluded) recurring 2 time/s', '1) 2017-01-02%a2) 2017-01-03'),
-        );
+            ['2017-01-01', 'P1D', '2017-01-04', \DatePeriod::EXCLUDE_START_DATE, 'every + 1d, from 2017-01-01 00:00:00.0 (excluded) to 2017-01-04 00:00:00.0', '1) 2017-01-02%a2) 2017-01-03'],
+            ['2017-01-01', 'P1D', 2, \DatePeriod::EXCLUDE_START_DATE, 'every + 1d, from 2017-01-01 00:00:00.0 (excluded) recurring 2 time/s', '1) 2017-01-02%a2) 2017-01-03'],
+        ];
 
         if (\PHP_VERSION_ID < 70107) {
             array_walk($periods, function (&$i) { $i[5] = ''; });
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
index aab1a9f382..0b9c2ed3fb 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/ExceptionCasterTest.php
@@ -36,7 +36,7 @@ class ExceptionCasterTest extends TestCase
 
     public function testDefaultSettings()
     {
-        $ref = array('foo');
+        $ref = ['foo'];
         $e = $this->getTestException('foo', $ref);
 
         $expectedDump = <<<'EODUMP'
@@ -57,7 +57,7 @@ Exception {
 EODUMP;
 
         $this->assertDumpMatchesFormat($expectedDump, $e);
-        $this->assertSame(array('foo'), $ref);
+        $this->assertSame(['foo'], $ref);
     }
 
     public function testSeek()
@@ -166,19 +166,19 @@ EODUMP;
     {
         require_once \dirname(__DIR__).'/Fixtures/Twig.php';
 
-        $f = array(
-            new FrameStub(array(
+        $f = [
+            new FrameStub([
                 'file' => \dirname(__DIR__).'/Fixtures/Twig.php',
                 'line' => 20,
                 'class' => '__TwigTemplate_VarDumperFixture_u75a09',
-            )),
-            new FrameStub(array(
+            ]),
+            new FrameStub([
                 'file' => \dirname(__DIR__).'/Fixtures/Twig.php',
                 'line' => 21,
                 'class' => '__TwigTemplate_VarDumperFixture_u75a09',
                 'object' => new \__TwigTemplate_VarDumperFixture_u75a09(null, __FILE__),
-            )),
-        );
+            ]),
+        ];
 
         $expectedDump = <<<'EODUMP'
 array:2 [
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/GmpCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/GmpCasterTest.php
index 1ddf897461..eb758e8e2c 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/GmpCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/GmpCasterTest.php
@@ -33,9 +33,9 @@ array:1 [
   "\\x00~\\x00value" => %s
 ]
 EODUMP;
-        $this->assertDumpEquals(sprintf($gmpDump, $gmpString), GmpCaster::castGmp($gmpString, array(), new Stub(), false, 0));
-        $this->assertDumpEquals(sprintf($gmpDump, $gmpOctal), GmpCaster::castGmp($gmpOctal, array(), new Stub(), false, 0));
-        $this->assertDumpEquals(sprintf($gmpDump, $gmp), GmpCaster::castGmp($gmp, array(), new Stub(), false, 0));
+        $this->assertDumpEquals(sprintf($gmpDump, $gmpString), GmpCaster::castGmp($gmpString, [], new Stub(), false, 0));
+        $this->assertDumpEquals(sprintf($gmpDump, $gmpOctal), GmpCaster::castGmp($gmpOctal, [], new Stub(), false, 0));
+        $this->assertDumpEquals(sprintf($gmpDump, $gmp), GmpCaster::castGmp($gmp, [], new Stub(), false, 0));
 
         $dump = <<<EODUMP
 GMP {
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
index 000e5feeb1..19bbe0f80c 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/PdoCasterTest.php
@@ -29,9 +29,9 @@ class PdoCasterTest extends TestCase
     public function testCastPdo()
     {
         $pdo = new \PDO('sqlite::memory:');
-        $pdo->setAttribute(\PDO::ATTR_STATEMENT_CLASS, array('PDOStatement', array($pdo)));
+        $pdo->setAttribute(\PDO::ATTR_STATEMENT_CLASS, ['PDOStatement', [$pdo]]);
 
-        $cast = PdoCaster::castPdo($pdo, array(), new Stub(), false);
+        $cast = PdoCaster::castPdo($pdo, [], new Stub(), false);
 
         $this->assertInstanceOf('Symfony\Component\VarDumper\Caster\EnumStub', $cast["\0~\0attributes"]);
 
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
index 64aa52a011..fd8194cca5 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/ReflectionCasterTest.php
@@ -90,10 +90,10 @@ EOTXT
         if (\defined('HHVM_VERSION_ID')) {
             $this->markTestSkipped('Not for HHVM.');
         }
-        $var = array(
+        $var = [
             (new \ReflectionMethod($this, __FUNCTION__))->getClosure($this),
             (new \ReflectionMethod(__CLASS__, 'tearDownAfterClass'))->getClosure(),
-        );
+        ];
 
         $this->assertDumpMatchesFormat(
             <<<EOTXT
@@ -235,7 +235,7 @@ array:2 [
 EODUMP;
 
         $r = new \ReflectionGenerator($generator);
-        $this->assertDumpMatchesFormat($expectedDump, array($r, $r->getExecutingGenerator()));
+        $this->assertDumpMatchesFormat($expectedDump, [$r, $r->getExecutingGenerator()]);
 
         foreach ($generator as $v) {
         }
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/SplCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/SplCasterTest.php
index e7487f5ca0..c7d7981388 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/SplCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/SplCasterTest.php
@@ -23,8 +23,8 @@ class SplCasterTest extends TestCase
 
     public function getCastFileInfoTests()
     {
-        return array(
-            array(__FILE__, <<<'EOTXT'
+        return [
+            [__FILE__, <<<'EOTXT'
 SplFileInfo {
 %Apath: "%sCaster"
   filename: "SplCasterTest.php"
@@ -49,8 +49,8 @@ SplFileInfo {
   link: false
 %A}
 EOTXT
-            ),
-            array('https://google.com/about', <<<'EOTXT'
+            ],
+            ['https://google.com/about', <<<'EOTXT'
 SplFileInfo {
 %Apath: "https://google.com"
   filename: "about"
@@ -60,8 +60,8 @@ SplFileInfo {
   realPath: false
 %A}
 EOTXT
-            ),
-        );
+            ],
+        ];
     }
 
     /** @dataProvider getCastFileInfoTests */
@@ -137,12 +137,12 @@ EOTXT;
 
     public function provideCastSplDoublyLinkedList()
     {
-        return array(
-            array(\SplDoublyLinkedList::IT_MODE_FIFO, 'IT_MODE_FIFO | IT_MODE_KEEP'),
-            array(\SplDoublyLinkedList::IT_MODE_LIFO, 'IT_MODE_LIFO | IT_MODE_KEEP'),
-            array(\SplDoublyLinkedList::IT_MODE_FIFO | \SplDoublyLinkedList::IT_MODE_DELETE, 'IT_MODE_FIFO | IT_MODE_DELETE'),
-            array(\SplDoublyLinkedList::IT_MODE_LIFO | \SplDoublyLinkedList::IT_MODE_DELETE, 'IT_MODE_LIFO | IT_MODE_DELETE'),
-        );
+        return [
+            [\SplDoublyLinkedList::IT_MODE_FIFO, 'IT_MODE_FIFO | IT_MODE_KEEP'],
+            [\SplDoublyLinkedList::IT_MODE_LIFO, 'IT_MODE_LIFO | IT_MODE_KEEP'],
+            [\SplDoublyLinkedList::IT_MODE_FIFO | \SplDoublyLinkedList::IT_MODE_DELETE, 'IT_MODE_FIFO | IT_MODE_DELETE'],
+            [\SplDoublyLinkedList::IT_MODE_LIFO | \SplDoublyLinkedList::IT_MODE_DELETE, 'IT_MODE_LIFO | IT_MODE_DELETE'],
+        ];
     }
 
     public function testCastObjectStorageIsntModified()
@@ -166,7 +166,7 @@ EOTXT;
 
     public function testCastArrayObject()
     {
-        $var = new \ArrayObject(array(123));
+        $var = new \ArrayObject([123]);
         $var->foo = 234;
 
         $expected = <<<EOTXT
@@ -185,7 +185,7 @@ EOTXT;
 
     public function testArrayIterator()
     {
-        $var = new MyArrayIterator(array(234));
+        $var = new MyArrayIterator([234]);
 
         $expected = <<<EOTXT
 Symfony\Component\VarDumper\Tests\Caster\MyArrayIterator {
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/StubCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/StubCasterTest.php
index de2f5f5aeb..8056f703b6 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/StubCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/StubCasterTest.php
@@ -26,7 +26,7 @@ class StubCasterTest extends TestCase
 
     public function testArgsStubWithDefaults($foo = 234, $bar = 456)
     {
-        $args = array(new ArgsStub(array(123), __FUNCTION__, __CLASS__));
+        $args = [new ArgsStub([123], __FUNCTION__, __CLASS__)];
 
         $expectedDump = <<<'EODUMP'
 array:1 [
@@ -41,7 +41,7 @@ EODUMP;
 
     public function testArgsStubWithExtraArgs($foo = 234)
     {
-        $args = array(new ArgsStub(array(123, 456), __FUNCTION__, __CLASS__));
+        $args = [new ArgsStub([123, 456], __FUNCTION__, __CLASS__)];
 
         $expectedDump = <<<'EODUMP'
 array:1 [
@@ -59,7 +59,7 @@ EODUMP;
 
     public function testArgsStubNoParamWithExtraArgs()
     {
-        $args = array(new ArgsStub(array(123), __FUNCTION__, __CLASS__));
+        $args = [new ArgsStub([123], __FUNCTION__, __CLASS__)];
 
         $expectedDump = <<<'EODUMP'
 array:1 [
@@ -74,7 +74,7 @@ EODUMP;
 
     public function testArgsStubWithClosure()
     {
-        $args = array(new ArgsStub(array(123), '{closure}', null));
+        $args = [new ArgsStub([123], '{closure}', null)];
 
         $expectedDump = <<<'EODUMP'
 array:1 [
@@ -89,13 +89,13 @@ EODUMP;
 
     public function testLinkStub()
     {
-        $var = array(new LinkStub(__CLASS__, 0, __FILE__));
+        $var = [new LinkStub(__CLASS__, 0, __FILE__)];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
-        $dumper->setDisplayOptions(array('fileLinkFormat' => '%f:%l'));
+        $dumper->setDisplayOptions(['fileLinkFormat' => '%f:%l']);
         $dump = $dumper->dump($cloner->cloneVar($var), true);
 
         $expectedDump = <<<'EODUMP'
@@ -110,13 +110,13 @@ EODUMP;
 
     public function testLinkStubWithNoFileLink()
     {
-        $var = array(new LinkStub('example.com', 0, 'http://example.com'));
+        $var = [new LinkStub('example.com', 0, 'http://example.com')];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
-        $dumper->setDisplayOptions(array('fileLinkFormat' => '%f:%l'));
+        $dumper->setDisplayOptions(['fileLinkFormat' => '%f:%l']);
         $dump = $dumper->dump($cloner->cloneVar($var), true);
 
         $expectedDump = <<<'EODUMP'
@@ -131,13 +131,13 @@ EODUMP;
 
     public function testClassStub()
     {
-        $var = array(new ClassStub('hello', array(FooInterface::class, 'foo')));
+        $var = [new ClassStub('hello', [FooInterface::class, 'foo'])];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
-        $dump = $dumper->dump($cloner->cloneVar($var), true, array('fileLinkFormat' => '%f:%l'));
+        $dump = $dumper->dump($cloner->cloneVar($var), true, ['fileLinkFormat' => '%f:%l']);
 
         $expectedDump = <<<'EODUMP'
 <foo></foo><bar><span class=sf-dump-note>array:1</span> [<samp>
@@ -151,7 +151,7 @@ EODUMP;
 
     public function testClassStubWithNotExistingClass()
     {
-        $var = array(new ClassStub(NotExisting::class));
+        $var = [new ClassStub(NotExisting::class)];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
@@ -172,13 +172,13 @@ EODUMP;
 
     public function testClassStubWithNotExistingMethod()
     {
-        $var = array(new ClassStub('hello', array(FooInterface::class, 'missing')));
+        $var = [new ClassStub('hello', [FooInterface::class, 'missing'])];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
-        $dump = $dumper->dump($cloner->cloneVar($var), true, array('fileLinkFormat' => '%f:%l'));
+        $dump = $dumper->dump($cloner->cloneVar($var), true, ['fileLinkFormat' => '%f:%l']);
 
         $expectedDump = <<<'EODUMP'
 <foo></foo><bar><span class=sf-dump-note>array:1</span> [<samp>
@@ -192,14 +192,14 @@ EODUMP;
 
     public function testClassStubWithAnonymousClass()
     {
-        $var = array(new ClassStub(\get_class(new class() extends \Exception {
-        })));
+        $var = [new ClassStub(\get_class(new class() extends \Exception {
+        }))];
 
         $cloner = new VarCloner();
         $dumper = new HtmlDumper();
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
-        $dump = $dumper->dump($cloner->cloneVar($var), true, array('fileLinkFormat' => '%f:%l'));
+        $dump = $dumper->dump($cloner->cloneVar($var), true, ['fileLinkFormat' => '%f:%l']);
 
         $expectedDump = <<<'EODUMP'
 <foo></foo><bar><span class=sf-dump-note>array:1</span> [<samp>
diff --git a/src/Symfony/Component/VarDumper/Tests/Caster/XmlReaderCasterTest.php b/src/Symfony/Component/VarDumper/Tests/Caster/XmlReaderCasterTest.php
index 374d298af1..1d7b3f6278 100644
--- a/src/Symfony/Component/VarDumper/Tests/Caster/XmlReaderCasterTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Caster/XmlReaderCasterTest.php
@@ -66,15 +66,15 @@ EODUMP;
 
     public function provideNodes()
     {
-        return array(
-            array(0, <<<'EODUMP'
+        return [
+            [0, <<<'EODUMP'
 XMLReader {
   +nodeType: NONE
    …13
 }
 EODUMP
-            ),
-            array(1, <<<'EODUMP'
+            ],
+            [1, <<<'EODUMP'
 XMLReader {
   +localName: "foo"
   +nodeType: ELEMENT
@@ -82,8 +82,8 @@ XMLReader {
    …11
 }
 EODUMP
-            ),
-            array(2, <<<'EODUMP'
+            ],
+            [2, <<<'EODUMP'
 XMLReader {
   +localName: "#text"
   +nodeType: SIGNIFICANT_WHITESPACE
@@ -96,8 +96,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(3, <<<'EODUMP'
+            ],
+            [3, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: ELEMENT
@@ -106,8 +106,8 @@ XMLReader {
    …10
 }
 EODUMP
-            ),
-            array(4, <<<'EODUMP'
+            ],
+            [4, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: END_ELEMENT
@@ -116,8 +116,8 @@ XMLReader {
    …10
 }
 EODUMP
-            ),
-            array(6, <<<'EODUMP'
+            ],
+            [6, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: ELEMENT
@@ -127,8 +127,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(9, <<<'EODUMP'
+            ],
+            [9, <<<'EODUMP'
 XMLReader {
   +localName: "#text"
   +nodeType: TEXT
@@ -138,8 +138,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(12, <<<'EODUMP'
+            ],
+            [12, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: ELEMENT
@@ -149,8 +149,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(13, <<<'EODUMP'
+            ],
+            [13, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: END_ELEMENT
@@ -159,8 +159,8 @@ XMLReader {
    …10
 }
 EODUMP
-            ),
-            array(15, <<<'EODUMP'
+            ],
+            [15, <<<'EODUMP'
 XMLReader {
   +localName: "bar"
   +nodeType: ELEMENT
@@ -170,8 +170,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(16, <<<'EODUMP'
+            ],
+            [16, <<<'EODUMP'
 XMLReader {
   +localName: "#text"
   +nodeType: SIGNIFICANT_WHITESPACE
@@ -184,8 +184,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(17, <<<'EODUMP'
+            ],
+            [17, <<<'EODUMP'
 XMLReader {
   +localName: "baz"
   +prefix: "baz"
@@ -196,8 +196,8 @@ XMLReader {
    …8
 }
 EODUMP
-            ),
-            array(18, <<<'EODUMP'
+            ],
+            [18, <<<'EODUMP'
 XMLReader {
   +localName: "baz"
   +prefix: "baz"
@@ -208,8 +208,8 @@ XMLReader {
    …8
 }
 EODUMP
-            ),
-            array(19, <<<'EODUMP'
+            ],
+            [19, <<<'EODUMP'
 XMLReader {
   +localName: "#text"
   +nodeType: SIGNIFICANT_WHITESPACE
@@ -222,8 +222,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(21, <<<'EODUMP'
+            ],
+            [21, <<<'EODUMP'
 XMLReader {
   +localName: "#text"
   +nodeType: SIGNIFICANT_WHITESPACE
@@ -233,8 +233,8 @@ XMLReader {
    …9
 }
 EODUMP
-            ),
-            array(22, <<<'EODUMP'
+            ],
+            [22, <<<'EODUMP'
 XMLReader {
   +localName: "foo"
   +nodeType: END_ELEMENT
@@ -242,7 +242,7 @@ XMLReader {
    …11
 }
 EODUMP
-            ),
-        );
+            ],
+        ];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Tests/Cloner/DataTest.php b/src/Symfony/Component/VarDumper/Tests/Cloner/DataTest.php
index d10951be93..7d20bced35 100644
--- a/src/Symfony/Component/VarDumper/Tests/Cloner/DataTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Cloner/DataTest.php
@@ -21,9 +21,9 @@ class DataTest extends TestCase
 {
     public function testBasicData()
     {
-        $values = array(1 => 123, 4.5, 'abc', null, false);
+        $values = [1 => 123, 4.5, 'abc', null, false];
         $data = $this->cloneVar($values);
-        $clonedValues = array();
+        $clonedValues = [];
 
         $this->assertInstanceOf(Data::class, $data);
         $this->assertCount(\count($values), $data);
@@ -62,7 +62,7 @@ class DataTest extends TestCase
 
     public function testArray()
     {
-        $values = array(array(), array(123));
+        $values = [[], [123]];
         $data = $this->cloneVar($values);
 
         $this->assertSame($values, $data->getValue(true));
@@ -83,7 +83,7 @@ class DataTest extends TestCase
 
     public function testStub()
     {
-        $data = $this->cloneVar(array(new ClassStub('stdClass')));
+        $data = $this->cloneVar([new ClassStub('stdClass')]);
         $data = $data[0];
 
         $this->assertSame('string', $data->getType());
@@ -93,15 +93,15 @@ class DataTest extends TestCase
 
     public function testHardRefs()
     {
-        $values = array(array());
+        $values = [[]];
         $values[1] = &$values[0];
         $values[2][0] = &$values[2];
 
         $data = $this->cloneVar($values);
 
-        $this->assertSame(array(), $data[0]->getValue());
-        $this->assertSame(array(), $data[1]->getValue());
-        $this->assertEquals(array($data[2]->getValue()), $data[2]->getValue(true));
+        $this->assertSame([], $data[0]->getValue());
+        $this->assertSame([], $data[1]->getValue());
+        $this->assertEquals([$data[2]->getValue()], $data[2]->getValue(true));
 
         $this->assertSame('array (count=3)', (string) $data);
     }
diff --git a/src/Symfony/Component/VarDumper/Tests/Cloner/VarClonerTest.php b/src/Symfony/Component/VarDumper/Tests/Cloner/VarClonerTest.php
index 12fabcf08c..3b180af498 100644
--- a/src/Symfony/Component/VarDumper/Tests/Cloner/VarClonerTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Cloner/VarClonerTest.php
@@ -21,7 +21,7 @@ class VarClonerTest extends TestCase
 {
     public function testMaxIntBoundary()
     {
-        $data = array(PHP_INT_MAX => 123);
+        $data = [PHP_INT_MAX => 123];
 
         $cloner = new VarCloner();
         $clone = $cloner->cloneVar($data);
@@ -149,42 +149,42 @@ EOTXT;
     public function testLimits()
     {
         // Level 0:
-        $data = array(
+        $data = [
             // Level 1:
-            array(
+            [
                 // Level 2:
-                array(
+                [
                     // Level 3:
                     'Level 3 Item 0',
                     'Level 3 Item 1',
                     'Level 3 Item 2',
                     'Level 3 Item 3',
-                ),
-                array(
+                ],
+                [
                     'Level 3 Item 4',
                     'Level 3 Item 5',
                     'Level 3 Item 6',
-                ),
-                array(
+                ],
+                [
                     'Level 3 Item 7',
-                ),
-            ),
-            array(
-                array(
+                ],
+            ],
+            [
+                [
                     'Level 3 Item 8',
-                ),
+                ],
                 'Level 2 Item 0',
-            ),
-            array(
+            ],
+            [
                 'Level 2 Item 1',
-            ),
+            ],
             'Level 1 Item 0',
-            array(
+            [
                 // Test setMaxString:
                 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
                 'SHORT',
-            ),
-        );
+            ],
+        ];
 
         $cloner = new VarCloner();
         $cloner->setMinDepth(2);
@@ -381,16 +381,16 @@ EOTXT;
 
     public function testCaster()
     {
-        $cloner = new VarCloner(array(
+        $cloner = new VarCloner([
             '*' => function ($obj, $array) {
-                return array('foo' => 123);
+                return ['foo' => 123];
             },
             __CLASS__ => function ($obj, $array) {
                 ++$array['foo'];
 
                 return $array;
             },
-        ));
+        ]);
         $clone = $cloner->cloneVar($this);
 
         $expected = <<<EOTXT
diff --git a/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/HtmlDescriptorTest.php b/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/HtmlDescriptorTest.php
index f80f7cf27b..f1febf7cec 100644
--- a/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/HtmlDescriptorTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/HtmlDescriptorTest.php
@@ -39,11 +39,11 @@ class HtmlDescriptorTest extends TestCase
         $dumper->method('dump')->willReturn('[DUMPED]');
         $descriptor = new HtmlDescriptor($dumper);
 
-        $descriptor->describe($output, new Data(array(array(123))), array('timestamp' => 1544804268.3668), 1);
+        $descriptor->describe($output, new Data([[123]]), ['timestamp' => 1544804268.3668], 1);
 
         $this->assertStringMatchesFormat('<style>%A</style><script>%A</script>%A', $output->fetch(), 'styles & scripts are output');
 
-        $descriptor->describe($output, new Data(array(array(123))), array('timestamp' => 1544804268.3668), 1);
+        $descriptor->describe($output, new Data([[123]]), ['timestamp' => 1544804268.3668], 1);
 
         $this->assertStringNotMatchesFormat('<style>%A</style><script>%A</script>%A', $output->fetch(), 'styles & scripts are output only once');
     }
@@ -58,21 +58,21 @@ class HtmlDescriptorTest extends TestCase
         $dumper->method('dump')->willReturn('[DUMPED]');
         $descriptor = new HtmlDescriptor($dumper);
 
-        $descriptor->describe($output, new Data(array(array(123))), $context + array('timestamp' => 1544804268.3668), 1);
+        $descriptor->describe($output, new Data([[123]]), $context + ['timestamp' => 1544804268.3668], 1);
 
         $this->assertStringMatchesFormat(trim($expectedOutput), trim(preg_replace('@<style>.*</style><script>.*</script>@s', '', $output->fetch())));
     }
 
     public function provideContext()
     {
-        yield 'source' => array(
-            array(
-                'source' => array(
+        yield 'source' => [
+            [
+                'source' => [
                     'name' => 'CliDescriptorTest.php',
                     'line' => 30,
                     'file' => '/Users/ogi/symfony/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/CliDescriptorTest.php',
-                ),
-            ),
+                ],
+            ],
             <<<TXT
 <article data-dedup-id="%s">
     <header>
@@ -92,19 +92,19 @@ class HtmlDescriptorTest extends TestCase
     </section>
 </article>
 TXT
-        );
+        ];
 
-        yield 'source full' => array(
-            array(
-                'source' => array(
+        yield 'source full' => [
+            [
+                'source' => [
                     'name' => 'CliDescriptorTest.php',
                     'project_dir' => 'src/Symfony/',
                     'line' => 30,
                     'file_relative' => 'src/Symfony/Component/VarDumper/Tests/Command/Descriptor/CliDescriptorTest.php',
                     'file' => '/Users/ogi/symfony/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/CliDescriptorTest.php',
                     'file_link' => 'phpstorm://open?file=/Users/ogi/symfony/src/Symfony/Component/VarDumper/Tests/Command/Descriptor/CliDescriptorTest.php&line=30',
-                ),
-            ),
+                ],
+            ],
             <<<TXT
 <article data-dedup-id="%s">
     <header>
@@ -128,15 +128,15 @@ TXT
     </section>
 </article>
 TXT
-        );
+        ];
 
-        yield 'cli' => array(
-            array(
-                'cli' => array(
+        yield 'cli' => [
+            [
+                'cli' => [
                     'identifier' => 'd8bece1c',
                     'command_line' => 'bin/phpunit',
-                ),
-            ),
+                ],
+            ],
             <<<TXT
 <article data-dedup-id="d8bece1c">
     <header>
@@ -156,17 +156,17 @@ TXT
     </section>
 </article>
 TXT
-        );
+        ];
 
-        yield 'request' => array(
-            array(
-                'request' => array(
+        yield 'request' => [
+            [
+                'request' => [
                     'identifier' => 'd8bece1c',
-                    'controller' => new Data(array(array('FooController.php'))),
+                    'controller' => new Data([['FooController.php']]),
                     'method' => 'GET',
                     'uri' => 'http://localhost/foo',
-                ),
-            ),
+                ],
+            ],
             <<<TXT
 <article data-dedup-id="d8bece1c">
     <header>
@@ -190,6 +190,6 @@ TXT
     </section>
 </article>
 TXT
-        );
+        ];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
index 919d4e4a78..3387dcdb24 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/CliDumperTest.php
@@ -32,13 +32,13 @@ class CliDumperTest extends TestCase
         $dumper = new CliDumper('php://output');
         $dumper->setColors(false);
         $cloner = new VarCloner();
-        $cloner->addCasters(array(
+        $cloner->addCasters([
             ':stream' => function ($res, $a) {
                 unset($a['uri'], $a['wrapper_data']);
 
                 return $a;
             },
-        ));
+        ]);
         $data = $cloner->cloneVar($var);
 
         ob_start();
@@ -121,11 +121,11 @@ EOTXT
         $dumper->setColors(false);
         $cloner = new VarCloner();
 
-        $var = array(
-            'array' => array('a', 'b'),
+        $var = [
+            'array' => ['a', 'b'],
             'string' => 'hello',
             'multiline string' => "this\nis\na\multiline\nstring",
-        );
+        ];
 
         $dump = $dumper->dump($cloner->cloneVar($var), true);
 
@@ -181,7 +181,7 @@ array:3 [
 
 EOTXT;
 
-        yield array($expected, CliDumper::DUMP_COMMA_SEPARATOR);
+        yield [$expected, CliDumper::DUMP_COMMA_SEPARATOR];
 
         $expected = <<<'EOTXT'
 array:3 [
@@ -200,7 +200,7 @@ array:3 [
 
 EOTXT;
 
-        yield array($expected, CliDumper::DUMP_TRAILING_COMMA);
+        yield [$expected, CliDumper::DUMP_TRAILING_COMMA];
     }
 
     /**
@@ -263,7 +263,7 @@ EOTXT
 
     public function testObjectCast()
     {
-        $var = (object) array(1 => 1);
+        $var = (object) [1 => 1];
         $var->{1} = 2;
 
         if (\PHP_VERSION_ID >= 70200) {
@@ -320,10 +320,10 @@ EOTXT
         putenv('DUMP_LIGHT_ARRAY=1');
         putenv('DUMP_STRING_LENGTH=1');
 
-        $var = array(
+        $var = [
             range(1, 3),
-            array('foo', 2 => 'bar'),
-        );
+            ['foo', 2 => 'bar'],
+        ];
 
         $this->assertDumpEquals(
             <<<EOTXT
@@ -360,22 +360,22 @@ EOTXT
         $dumper = new CliDumper();
         $dumper->setColors(false);
         $cloner = new VarCloner();
-        $cloner->addCasters(array(
+        $cloner->addCasters([
             ':stream' => function ($res, $a) {
                 unset($a['wrapper_data']);
 
                 return $a;
             },
-        ));
-        $cloner->addCasters(array(
+        ]);
+        $cloner->addCasters([
             ':stream' => eval('return function () use ($twig) {
                 try {
-                    $twig->render(array());
+                    $twig->render([]);
                 } catch (\Twig\Error\RuntimeError $e) {
                     throw $e->getPrevious();
                 }
             };'),
-        ));
+        ]);
         $ref = (int) $out;
 
         $data = $cloner->cloneVar($out);
@@ -416,7 +416,7 @@ EOTXT
 
     public function testRefsInProperties()
     {
-        $var = (object) array('foo' => 'foo');
+        $var = (object) ['foo' => 'foo'];
         $var->bar = &$var->foo;
 
         $dumper = new CliDumper();
@@ -530,12 +530,12 @@ EOTXT
         }
 
         $var = function &() {
-            $var = array();
+            $var = [];
             $var[] = &$var;
 
             return $var;
         };
 
-        return array($var(), $GLOBALS, &$GLOBALS);
+        return [$var(), $GLOBALS, &$GLOBALS];
     }
 }
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/FunctionsTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/FunctionsTest.php
index 81ecdddc56..0bd596c2ad 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/FunctionsTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/FunctionsTest.php
@@ -43,7 +43,7 @@ class FunctionsTest extends TestCase
         $return = dump($var1, $var2, $var3);
         $out = ob_get_clean();
 
-        $this->assertEquals(array($var1, $var2, $var3), $return);
+        $this->assertEquals([$var1, $var2, $var3], $return);
     }
 
     protected function setupVarDumper()
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
index af3db4b754..da8e21dff9 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/HtmlDumperTest.php
@@ -32,13 +32,13 @@ class HtmlDumperTest extends TestCase
         $dumper->setDumpHeader('<foo></foo>');
         $dumper->setDumpBoundaries('<bar>', '</bar>');
         $cloner = new VarCloner();
-        $cloner->addCasters(array(
+        $cloner->addCasters([
             ':stream' => function ($res, $a) {
                 unset($a['uri'], $a['wrapper_data']);
 
                 return $a;
             },
-        ));
+        ]);
         $data = $cloner->cloneVar($var);
 
         ob_start();
diff --git a/src/Symfony/Component/VarDumper/Tests/Dumper/ServerDumperTest.php b/src/Symfony/Component/VarDumper/Tests/Dumper/ServerDumperTest.php
index 288391bfcf..b4bef49cd3 100644
--- a/src/Symfony/Component/VarDumper/Tests/Dumper/ServerDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Dumper/ServerDumperTest.php
@@ -44,14 +44,14 @@ class ServerDumperTest extends TestCase
 
         $cloner = new VarCloner();
         $data = $cloner->cloneVar('foo');
-        $dumper = new ServerDumper(self::VAR_DUMPER_SERVER, $wrappedDumper, array(
+        $dumper = new ServerDumper(self::VAR_DUMPER_SERVER, $wrappedDumper, [
             'foo_provider' => new class() implements ContextProviderInterface {
                 public function getContext(): ?array
                 {
-                    return array('foo');
+                    return ['foo'];
                 }
             },
-        ));
+        ]);
 
         $dumped = null;
         $process = $this->getServerProcess();
@@ -84,10 +84,10 @@ DUMP
 
     private function getServerProcess(): Process
     {
-        $process = new PhpProcess(file_get_contents(__DIR__.'/../Fixtures/dump_server.php'), null, array(
+        $process = new PhpProcess(file_get_contents(__DIR__.'/../Fixtures/dump_server.php'), null, [
             'COMPONENT_ROOT' => __DIR__.'/../../',
             'VAR_DUMPER_SERVER' => self::VAR_DUMPER_SERVER,
-        ));
+        ]);
         $process->inheritEnvironmentVariables(true);
 
         return $process->setTimeout(9);
diff --git a/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php b/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
index fe2542929b..8b84d820fc 100644
--- a/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
+++ b/src/Symfony/Component/VarDumper/Tests/Fixtures/Twig.php
@@ -11,11 +11,11 @@ class __TwigTemplate_VarDumperFixture_u75a09 extends Twig\Template
             parent::__construct($env);
         }
         $this->parent = false;
-        $this->blocks = array();
+        $this->blocks = [];
         $this->path = $path;
     }
 
-    protected function doDisplay(array $context, array $blocks = array())
+    protected function doDisplay(array $context, array $blocks = [])
     {
         // line 2
         throw new \Exception('Foobar');
@@ -28,7 +28,7 @@ class __TwigTemplate_VarDumperFixture_u75a09 extends Twig\Template
 
     public function getDebugInfo()
     {
-        return array(20 => 1, 21 => 2);
+        return [20 => 1, 21 => 2];
     }
 
     public function getSourceContext()
diff --git a/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php b/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
index 780f3b28d1..dcce237243 100644
--- a/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
+++ b/src/Symfony/Component/VarDumper/Tests/Fixtures/dumb-var.php
@@ -14,19 +14,19 @@ $foo->bar = 'bar';
 
 $g = fopen(__FILE__, 'r');
 
-$var = array(
+$var = [
     'number' => 1, null,
     'const' => 1.1, true, false, NAN, INF, -INF, PHP_INT_MAX,
     'str' => "déjà\n", "\xE9\x00test\t\ning",
-    '[]' => array(),
+    '[]' => [],
     'res' => $g,
     'obj' => $foo,
     'closure' => function ($a, \PDO &$b = null) {},
     'line' => __LINE__ - 1,
-    'nobj' => array((object) array()),
-);
+    'nobj' => [(object) []],
+];
 
-$r = array();
+$r = [];
 $r[] = &$r;
 
 $var['recurs'] = &$r;
diff --git a/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php b/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
index eeb7495dac..21902b5cf1 100644
--- a/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Server/ConnectionTest.php
@@ -26,14 +26,14 @@ class ConnectionTest extends TestCase
     {
         $cloner = new VarCloner();
         $data = $cloner->cloneVar('foo');
-        $connection = new Connection(self::VAR_DUMPER_SERVER, array(
+        $connection = new Connection(self::VAR_DUMPER_SERVER, [
             'foo_provider' => new class() implements ContextProviderInterface {
                 public function getContext(): ?array
                 {
-                    return array('foo');
+                    return ['foo'];
                 }
             },
-        ));
+        ]);
 
         $dumped = null;
         $process = $this->getServerProcess();
@@ -77,10 +77,10 @@ DUMP
 
     private function getServerProcess(): Process
     {
-        $process = new PhpProcess(file_get_contents(__DIR__.'/../Fixtures/dump_server.php'), null, array(
+        $process = new PhpProcess(file_get_contents(__DIR__.'/../Fixtures/dump_server.php'), null, [
             'COMPONENT_ROOT' => __DIR__.'/../../',
             'VAR_DUMPER_SERVER' => self::VAR_DUMPER_SERVER,
-        ));
+        ]);
         $process->inheritEnvironmentVariables(true);
 
         return $process->setTimeout(9);
diff --git a/src/Symfony/Component/VarDumper/Tests/Test/VarDumperTestTraitTest.php b/src/Symfony/Component/VarDumper/Tests/Test/VarDumperTestTraitTest.php
index 25ce23c5ce..a4d489cf34 100644
--- a/src/Symfony/Component/VarDumper/Tests/Test/VarDumperTestTraitTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/Test/VarDumperTestTraitTest.php
@@ -21,7 +21,7 @@ class VarDumperTestTraitTest extends TestCase
     public function testItComparesLargeData()
     {
         $howMany = 700;
-        $data = array_fill_keys(range(0, $howMany), array('a', 'b', 'c', 'd'));
+        $data = array_fill_keys(range(0, $howMany), ['a', 'b', 'c', 'd']);
 
         $expected = sprintf("array:%d [\n", $howMany + 1);
         for ($i = 0; $i <= $howMany; ++$i) {
@@ -41,6 +41,6 @@ EODUMP;
 
     public function testAllowsNonScalarExpectation()
     {
-        $this->assertDumpEquals(new \ArrayObject(array('bim' => 'bam')), new \ArrayObject(array('bim' => 'bam')));
+        $this->assertDumpEquals(new \ArrayObject(['bim' => 'bam']), new \ArrayObject(['bim' => 'bam']));
     }
 }
diff --git a/src/Symfony/Component/VarDumper/VarDumper.php b/src/Symfony/Component/VarDumper/VarDumper.php
index 7c302a21ff..4271e63965 100644
--- a/src/Symfony/Component/VarDumper/VarDumper.php
+++ b/src/Symfony/Component/VarDumper/VarDumper.php
@@ -33,7 +33,7 @@ class VarDumper
             if (isset($_SERVER['VAR_DUMPER_FORMAT'])) {
                 $dumper = 'html' === $_SERVER['VAR_DUMPER_FORMAT'] ? new HtmlDumper() : new CliDumper();
             } else {
-                $dumper = \in_array(\PHP_SAPI, array('cli', 'phpdbg')) ? new CliDumper() : new HtmlDumper();
+                $dumper = \in_array(\PHP_SAPI, ['cli', 'phpdbg']) ? new CliDumper() : new HtmlDumper();
             }
 
             self::$handler = function ($var) use ($cloner, $dumper) {
diff --git a/src/Symfony/Component/VarExporter/Instantiator.php b/src/Symfony/Component/VarExporter/Instantiator.php
index 0061d76e78..7eefc3c2d2 100644
--- a/src/Symfony/Component/VarExporter/Instantiator.php
+++ b/src/Symfony/Component/VarExporter/Instantiator.php
@@ -57,20 +57,20 @@ final class Instantiator
      *
      * @throws ExceptionInterface When the instance cannot be created
      */
-    public static function instantiate(string $class, array $properties = array(), array $privateProperties = array())
+    public static function instantiate(string $class, array $properties = [], array $privateProperties = [])
     {
         $reflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class);
 
         if (Registry::$cloneable[$class]) {
-            $wrappedInstance = array(clone Registry::$prototypes[$class]);
+            $wrappedInstance = [clone Registry::$prototypes[$class]];
         } elseif (Registry::$instantiableWithoutConstructor[$class]) {
-            $wrappedInstance = array($reflector->newInstanceWithoutConstructor());
+            $wrappedInstance = [$reflector->newInstanceWithoutConstructor()];
         } elseif (null === Registry::$prototypes[$class]) {
             throw new NotInstantiableTypeException($class);
         } elseif ($reflector->implementsInterface('Serializable')) {
-            $wrappedInstance = array(unserialize('C:'.\strlen($class).':"'.$class.'":0:{}'));
+            $wrappedInstance = [unserialize('C:'.\strlen($class).':"'.$class.'":0:{}')];
         } else {
-            $wrappedInstance = array(unserialize('O:'.\strlen($class).':"'.$class.'":0:{}'));
+            $wrappedInstance = [unserialize('O:'.\strlen($class).':"'.$class.'":0:{}')];
         }
 
         if ($properties) {
@@ -84,7 +84,7 @@ final class Instantiator
             foreach ($properties as $name => $value) {
                 // because they're also used for "unserialization", hydrators
                 // deal with array of instances, so we need to wrap values
-                $properties[$name] = array($value);
+                $properties[$name] = [$value];
             }
             (Hydrator::$hydrators[$class] ?? Hydrator::getHydrator($class))($properties, $wrappedInstance);
         }
diff --git a/src/Symfony/Component/VarExporter/Internal/Exporter.php b/src/Symfony/Component/VarExporter/Internal/Exporter.php
index 38a8e25088..fae9084ca0 100644
--- a/src/Symfony/Component/VarExporter/Internal/Exporter.php
+++ b/src/Symfony/Component/VarExporter/Internal/Exporter.php
@@ -53,7 +53,7 @@ class Exporter
                     ++$value->count;
                     continue;
                 }
-                $refsPool[] = array(&$refs[$k], $value, &$value);
+                $refsPool[] = [&$refs[$k], $value, &$value];
                 $refs[$k] = $values[$k] = new Reference(-\count($refsPool), $value);
             }
 
@@ -74,7 +74,7 @@ class Exporter
             }
 
             $class = \get_class($value);
-            $properties = array();
+            $properties = [];
             $sleep = null;
             $arrayValue = (array) $value;
             $reflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class);
@@ -94,10 +94,10 @@ class Exporter
                     $properties[] = $v;
                     $properties[] = $value[$v];
                 }
-                $properties = array('SplObjectStorage' => array("\0" => $properties));
+                $properties = ['SplObjectStorage' => ["\0" => $properties]];
             } elseif ($value instanceof \Serializable || $value instanceof \__PHP_Incomplete_Class) {
                 ++$objectsCount;
-                $objectsPool[$value] = array($id = \count($objectsPool), serialize($value), array(), 0);
+                $objectsPool[$value] = [$id = \count($objectsPool), serialize($value), [], 0];
                 $value = new Reference($id);
                 goto handle_value;
             }
@@ -154,10 +154,10 @@ class Exporter
                 }
             }
 
-            $objectsPool[$value] = array($id = \count($objectsPool));
+            $objectsPool[$value] = [$id = \count($objectsPool)];
             $properties = self::prepare($properties, $objectsPool, $refsPool, $objectsCount, $valueIsStatic);
             ++$objectsCount;
-            $objectsPool[$value] = array($id, $class, $properties, \method_exists($class, '__wakeup') ? $objectsCount : 0);
+            $objectsPool[$value] = [$id, $class, $properties, \method_exists($class, '__wakeup') ? $objectsCount : 0];
 
             $value = new Reference($id);
 
@@ -177,7 +177,7 @@ class Exporter
     {
         switch (true) {
             case \is_int($value) || \is_float($value): return var_export($value, true);
-            case array() === $value: return '[]';
+            case [] === $value: return '[]';
             case false === $value: return 'false';
             case true === $value: return 'true';
             case null === $value: return 'null';
@@ -201,11 +201,11 @@ class Exporter
             $code = var_export($value, true);
 
             if (false !== strpos($value, "\n") || false !== strpos($value, "\r")) {
-                $code = strtr($code, array(
+                $code = strtr($code, [
                     "\r\n" => "'.\"\\r\\n\"\n".$subIndent.".'",
                     "\r" => "'.\"\\r\"\n".$subIndent.".'",
                     "\n" => "'.\"\\n\"\n".$subIndent.".'",
-                ));
+                ]);
             }
 
             if (false !== strpos($value, "\0")) {
@@ -264,8 +264,8 @@ class Exporter
     private static function exportRegistry(Registry $value, string $indent, string $subIndent): string
     {
         $code = '';
-        $serializables = array();
-        $seen = array();
+        $serializables = [];
+        $seen = [];
         $prototypesAccess = 0;
         $factoriesAccess = 0;
         $r = '\\'.Registry::class;
@@ -340,13 +340,13 @@ class Exporter
             $code .= $subIndent.'    '.self::export($class).' => '.self::export($properties, $subIndent.'    ').",\n";
         }
 
-        $code = array(
+        $code = [
             self::export($value->registry, $subIndent),
             self::export($value->values, $subIndent),
             '' !== $code ? "[\n".$code.$subIndent.']' : '[]',
             self::export($value->value, $subIndent),
             self::export($value->wakeups, $subIndent),
-        );
+        ];
 
         return '\\'.\get_class($value)."::hydrate(\n".$subIndent.implode(",\n".$subIndent, $code)."\n".$indent.')';
     }
@@ -360,11 +360,11 @@ class Exporter
         $reflector = $value instanceof \ArrayIterator ? 'ArrayIterator' : 'ArrayObject';
         $reflector = Registry::$reflectors[$reflector] ?? Registry::getClassReflector($reflector);
 
-        $properties = array(
+        $properties = [
             $arrayValue,
             $reflector->getMethod('getFlags')->invoke($value),
             $value instanceof \ArrayObject ? $reflector->getMethod('getIteratorClass')->invoke($value) : 'ArrayIterator',
-        );
+        ];
 
         $reflector = $reflector->getMethod('setFlags');
         $reflector->invoke($proto, \ArrayObject::STD_PROP_LIST);
@@ -378,13 +378,13 @@ class Exporter
         }
         $reflector->invoke($value, $properties[1]);
 
-        if (array(array(), 0, 'ArrayIterator') === $properties) {
-            $properties = array();
+        if ([[], 0, 'ArrayIterator'] === $properties) {
+            $properties = [];
         } else {
             if ('ArrayIterator' === $properties[2]) {
                 unset($properties[2]);
             }
-            $properties = array($reflector->class => array("\0" => $properties));
+            $properties = [$reflector->class => ["\0" => $properties]];
         }
 
         return $properties;
diff --git a/src/Symfony/Component/VarExporter/Internal/Hydrator.php b/src/Symfony/Component/VarExporter/Internal/Hydrator.php
index a1a60112d9..07721df428 100644
--- a/src/Symfony/Component/VarExporter/Internal/Hydrator.php
+++ b/src/Symfony/Component/VarExporter/Internal/Hydrator.php
@@ -20,7 +20,7 @@ use Symfony\Component\VarExporter\Exception\ClassNotFoundException;
  */
 class Hydrator
 {
-    public static $hydrators = array();
+    public static $hydrators = [];
 
     public $registry;
     public $values;
@@ -77,7 +77,7 @@ class Hydrator
         switch ($class) {
             case 'ArrayIterator':
             case 'ArrayObject':
-                $constructor = \Closure::fromCallable(array($classReflector->getConstructor(), 'invokeArgs'));
+                $constructor = \Closure::fromCallable([$classReflector->getConstructor(), 'invokeArgs']);
 
                 return self::$hydrators[$class] = static function ($properties, $objects) use ($constructor) {
                     foreach ($properties as $name => $values) {
@@ -87,7 +87,7 @@ class Hydrator
                             }
                         }
                     }
-                    foreach ($properties["\0"] ?? array() as $i => $v) {
+                    foreach ($properties["\0"] ?? [] as $i => $v) {
                         $constructor($objects[$i], $v);
                     }
                 };
@@ -118,11 +118,11 @@ class Hydrator
                 };
         }
 
-        $propertySetters = array();
+        $propertySetters = [];
         foreach ($classReflector->getProperties() as $propertyReflector) {
             if (!$propertyReflector->isStatic()) {
                 $propertyReflector->setAccessible(true);
-                $propertySetters[$propertyReflector->name] = \Closure::fromCallable(array($propertyReflector, 'setValue'));
+                $propertySetters[$propertyReflector->name] = \Closure::fromCallable([$propertyReflector, 'setValue']);
             }
         }
 
diff --git a/src/Symfony/Component/VarExporter/Internal/Registry.php b/src/Symfony/Component/VarExporter/Internal/Registry.php
index 705722650a..629836b00b 100644
--- a/src/Symfony/Component/VarExporter/Internal/Registry.php
+++ b/src/Symfony/Component/VarExporter/Internal/Registry.php
@@ -21,11 +21,11 @@ use Symfony\Component\VarExporter\Exception\NotInstantiableTypeException;
  */
 class Registry
 {
-    public static $reflectors = array();
-    public static $prototypes = array();
-    public static $factories = array();
-    public static $cloneable = array();
-    public static $instantiableWithoutConstructor = array();
+    public static $reflectors = [];
+    public static $prototypes = [];
+    public static $factories = [];
+    public static $cloneable = [];
+    public static $instantiableWithoutConstructor = [];
 
     public function __construct(array $classes)
     {
@@ -60,7 +60,7 @@ class Registry
     {
         $reflector = self::$reflectors[$class] ?? self::getClassReflector($class, true, false);
 
-        return self::$factories[$class] = \Closure::fromCallable(array($reflector, 'newInstanceWithoutConstructor'));
+        return self::$factories[$class] = \Closure::fromCallable([$reflector, 'newInstanceWithoutConstructor']);
     }
 
     public static function getClassReflector($class, $instantiableWithoutConstructor = false, $cloneable = null)
@@ -118,17 +118,17 @@ class Registry
             static $setTrace;
 
             if (null === $setTrace) {
-                $setTrace = array(
+                $setTrace = [
                     new \ReflectionProperty(\Error::class, 'trace'),
                     new \ReflectionProperty(\Exception::class, 'trace'),
-                );
+                ];
                 $setTrace[0]->setAccessible(true);
                 $setTrace[1]->setAccessible(true);
-                $setTrace[0] = \Closure::fromCallable(array($setTrace[0], 'setValue'));
-                $setTrace[1] = \Closure::fromCallable(array($setTrace[1], 'setValue'));
+                $setTrace[0] = \Closure::fromCallable([$setTrace[0], 'setValue']);
+                $setTrace[1] = \Closure::fromCallable([$setTrace[1], 'setValue']);
             }
 
-            $setTrace[$proto instanceof \Exception]($proto, array());
+            $setTrace[$proto instanceof \Exception]($proto, []);
         }
 
         return self::$reflectors[$class] = $reflector;
diff --git a/src/Symfony/Component/VarExporter/Tests/InstantiatorTest.php b/src/Symfony/Component/VarExporter/Tests/InstantiatorTest.php
index 2cb8e7a359..cae10e3b44 100644
--- a/src/Symfony/Component/VarExporter/Tests/InstantiatorTest.php
+++ b/src/Symfony/Component/VarExporter/Tests/InstantiatorTest.php
@@ -37,30 +37,30 @@ class InstantiatorTest extends TestCase
 
     public function provideFailingInstantiation()
     {
-        yield array('ReflectionClass');
-        yield array('SplHeap');
-        yield array('Throwable');
-        yield array('Closure');
-        yield array('SplFileInfo');
+        yield ['ReflectionClass'];
+        yield ['SplHeap'];
+        yield ['Throwable'];
+        yield ['Closure'];
+        yield ['SplFileInfo'];
     }
 
     public function testInstantiate()
     {
-        $this->assertEquals((object) array('p' => 123), Instantiator::instantiate('stdClass', array('p' => 123)));
-        $this->assertEquals((object) array('p' => 123), Instantiator::instantiate('STDcLASS', array('p' => 123)));
-        $this->assertEquals(new \ArrayObject(array(123)), Instantiator::instantiate(\ArrayObject::class, array("\0" => array(array(123)))));
+        $this->assertEquals((object) ['p' => 123], Instantiator::instantiate('stdClass', ['p' => 123]));
+        $this->assertEquals((object) ['p' => 123], Instantiator::instantiate('STDcLASS', ['p' => 123]));
+        $this->assertEquals(new \ArrayObject([123]), Instantiator::instantiate(\ArrayObject::class, ["\0" => [[123]]]));
 
-        $expected = array(
+        $expected = [
             "\0".__NAMESPACE__."\Bar\0priv" => 123,
             "\0".__NAMESPACE__."\Foo\0priv" => 234,
-        );
+        ];
 
-        $this->assertSame($expected, (array) Instantiator::instantiate(Bar::class, array('priv' => 123), array(Foo::class => array('priv' => 234))));
+        $this->assertSame($expected, (array) Instantiator::instantiate(Bar::class, ['priv' => 123], [Foo::class => ['priv' => 234]]));
 
-        $e = Instantiator::instantiate('Exception', array('foo' => 123, 'trace' => array(234)));
+        $e = Instantiator::instantiate('Exception', ['foo' => 123, 'trace' => [234]]);
 
         $this->assertSame(123, $e->foo);
-        $this->assertSame(array(234), $e->getTrace());
+        $this->assertSame([234], $e->getTrace());
     }
 }
 
diff --git a/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php b/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
index c34a7e4fb7..5bb03d8ce1 100644
--- a/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
+++ b/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
@@ -28,7 +28,7 @@ class VarExporterTest extends TestCase
     {
         $unserializeCallback = ini_set('unserialize_callback_func', 'var_dump');
         try {
-            Registry::unserialize(array(), array('O:20:"SomeNotExistingClass":0:{}'));
+            Registry::unserialize([], ['O:20:"SomeNotExistingClass":0:{}']);
         } finally {
             $this->assertSame('var_dump', ini_set('unserialize_callback_func', $unserializeCallback));
         }
@@ -51,25 +51,25 @@ class VarExporterTest extends TestCase
 
     public function provideFailingSerialization()
     {
-        yield array(hash_init('md5'));
-        yield array(new \ReflectionClass('stdClass'));
-        yield array((new \ReflectionFunction(function (): int {}))->getReturnType());
-        yield array(new \ReflectionGenerator((function () { yield 123; })()));
-        yield array(function () {});
-        yield array(function () { yield 123; });
-        yield array(new \SplFileInfo(__FILE__));
-        yield array($h = fopen(__FILE__, 'r'));
-        yield array(array($h));
+        yield [hash_init('md5')];
+        yield [new \ReflectionClass('stdClass')];
+        yield [(new \ReflectionFunction(function (): int {}))->getReturnType()];
+        yield [new \ReflectionGenerator((function () { yield 123; })())];
+        yield [function () {}];
+        yield [function () { yield 123; }];
+        yield [new \SplFileInfo(__FILE__)];
+        yield [$h = fopen(__FILE__, 'r')];
+        yield [[$h]];
 
         $a = new class() {
         };
 
-        yield array($a);
+        yield [$a];
 
-        $a = array(null, $h);
+        $a = [null, $h];
         $a[0] = &$a;
 
-        yield array($a);
+        yield [$a];
     }
 
     /**
@@ -108,26 +108,26 @@ class VarExporterTest extends TestCase
 
     public function provideExport()
     {
-        yield array('multiline-string', array("\0\0\r\nA" => "B\rC\n\n"), true);
+        yield ['multiline-string', ["\0\0\r\nA" => "B\rC\n\n"], true];
 
-        yield array('bool', true, true);
-        yield array('simple-array', array(123, array('abc')), true);
-        yield array('partially-indexed-array', array(5 => true, 1 => true, 2 => true, 6 => true), true);
-        yield array('datetime', \DateTime::createFromFormat('U', 0));
+        yield ['bool', true, true];
+        yield ['simple-array', [123, ['abc']], true];
+        yield ['partially-indexed-array', [5 => true, 1 => true, 2 => true, 6 => true], true];
+        yield ['datetime', \DateTime::createFromFormat('U', 0)];
 
         $value = new \ArrayObject();
         $value[0] = 1;
         $value->foo = new \ArrayObject();
         $value[1] = $value;
 
-        yield array('array-object', $value);
+        yield ['array-object', $value];
 
-        yield array('array-iterator', new \ArrayIterator(array(123), 1));
-        yield array('array-object-custom', new MyArrayObject(array(234)));
+        yield ['array-iterator', new \ArrayIterator([123], 1)];
+        yield ['array-object-custom', new MyArrayObject([234])];
 
         $value = new MySerializable();
 
-        yield array('serializable', array($value, $value));
+        yield ['serializable', [$value, $value]];
 
         $value = new MyWakeup();
         $value->sub = new MyWakeup();
@@ -135,33 +135,33 @@ class VarExporterTest extends TestCase
         $value->sub->bis = 123;
         $value->sub->baz = 123;
 
-        yield array('wakeup', $value);
+        yield ['wakeup', $value];
 
-        yield array('clone', array(new MyCloneable(), new MyNotCloneable()));
+        yield ['clone', [new MyCloneable(), new MyNotCloneable()]];
 
-        yield array('private', array(new MyPrivateValue(123, 234), new MyPrivateChildValue(123, 234)));
+        yield ['private', [new MyPrivateValue(123, 234), new MyPrivateChildValue(123, 234)]];
 
         $value = new \SplObjectStorage();
         $value[new \stdClass()] = 345;
 
-        yield array('spl-object-storage', $value);
+        yield ['spl-object-storage', $value];
 
-        yield array('incomplete-class', unserialize('O:20:"SomeNotExistingClass":0:{}'));
+        yield ['incomplete-class', unserialize('O:20:"SomeNotExistingClass":0:{}')];
 
-        $value = array((object) array());
+        $value = [(object) []];
         $value[1] = &$value[0];
         $value[2] = $value[0];
 
-        yield array('hard-references', $value);
+        yield ['hard-references', $value];
 
-        $value = array();
+        $value = [];
         $value[0] = &$value;
 
-        yield array('hard-references-recursive', $value);
+        yield ['hard-references-recursive', $value];
 
-        static $value = array(123);
+        static $value = [123];
 
-        yield array('external-references', array(&$value), true);
+        yield ['external-references', [&$value], true];
 
         unset($value);
 
@@ -169,34 +169,34 @@ class VarExporterTest extends TestCase
 
         $rt = new \ReflectionProperty('Error', 'trace');
         $rt->setAccessible(true);
-        $rt->setValue($value, array('file' => __FILE__, 'line' => 123));
+        $rt->setValue($value, ['file' => __FILE__, 'line' => 123]);
 
         $rl = new \ReflectionProperty('Error', 'line');
         $rl->setAccessible(true);
         $rl->setValue($value, 234);
 
-        yield array('error', $value);
+        yield ['error', $value];
 
-        yield array('var-on-sleep', new GoodNight());
+        yield ['var-on-sleep', new GoodNight()];
 
         $value = new FinalError(false);
-        $rt->setValue($value, array());
+        $rt->setValue($value, []);
         $rl->setValue($value, 123);
 
-        yield array('final-error', $value);
+        yield ['final-error', $value];
 
-        yield array('final-array-iterator', new FinalArrayIterator());
+        yield ['final-array-iterator', new FinalArrayIterator()];
 
-        yield array('final-stdclass', new FinalStdClass());
+        yield ['final-stdclass', new FinalStdClass()];
 
         $value = new MyWakeup();
         $value->bis = new \ReflectionClass($value);
 
-        yield array('wakeup-refl', $value);
+        yield ['wakeup-refl', $value];
 
-        yield array('abstract-parent', new ConcreteClass());
+        yield ['abstract-parent', new ConcreteClass()];
 
-        yield array('foo-serializable', new FooSerializable('bar'));
+        yield ['foo-serializable', new FooSerializable('bar')];
     }
 }
 
@@ -222,7 +222,7 @@ class MyWakeup
 
     public function __sleep()
     {
-        return array('sub', 'baz');
+        return ['sub', 'baz'];
     }
 
     public function __wakeup()
@@ -287,7 +287,7 @@ class GoodNight
     {
         $this->good = 'night';
 
-        return array('good');
+        return ['good'];
     }
 }
 
@@ -305,7 +305,7 @@ final class FinalArrayIterator extends \ArrayIterator
 {
     public function serialize()
     {
-        return serialize(array(123, parent::serialize()));
+        return serialize([123, parent::serialize()]);
     }
 
     public function unserialize($data)
@@ -362,7 +362,7 @@ class FooSerializable implements \Serializable
 
     public function serialize(): string
     {
-        return serialize(array($this->getFoo()));
+        return serialize([$this->getFoo()]);
     }
 
     public function unserialize($str)
diff --git a/src/Symfony/Component/VarExporter/VarExporter.php b/src/Symfony/Component/VarExporter/VarExporter.php
index ffe44a3db1..45ef7446b1 100644
--- a/src/Symfony/Component/VarExporter/VarExporter.php
+++ b/src/Symfony/Component/VarExporter/VarExporter.php
@@ -48,13 +48,13 @@ final class VarExporter
         }
 
         $objectsPool = new \SplObjectStorage();
-        $refsPool = array();
+        $refsPool = [];
         $objectsCount = 0;
 
         try {
-            $value = Exporter::prepare(array($value), $objectsPool, $refsPool, $objectsCount, $isStaticValue)[0];
+            $value = Exporter::prepare([$value], $objectsPool, $refsPool, $objectsCount, $isStaticValue)[0];
         } finally {
-            $references = array();
+            $references = [];
             foreach ($refsPool as $i => $v) {
                 if ($v[0]->count) {
                     $references[1 + $i] = $v[2];
@@ -67,9 +67,9 @@ final class VarExporter
             return Exporter::export($value);
         }
 
-        $classes = array();
-        $values = array();
-        $wakeups = array();
+        $classes = [];
+        $values = [];
+        $wakeups = [];
         foreach ($objectsPool as $i => $v) {
             list(, $classes[], $values[], $wakeup) = $objectsPool[$v];
             if ($wakeup) {
@@ -78,7 +78,7 @@ final class VarExporter
         }
         ksort($wakeups);
 
-        $properties = array();
+        $properties = [];
         foreach ($values as $i => $vars) {
             foreach ($vars as $class => $values) {
                 foreach ($values as $name => $v) {
diff --git a/src/Symfony/Component/WebLink/EventListener/AddLinkHeaderListener.php b/src/Symfony/Component/WebLink/EventListener/AddLinkHeaderListener.php
index ef2fdee79d..3d04f9a13f 100644
--- a/src/Symfony/Component/WebLink/EventListener/AddLinkHeaderListener.php
+++ b/src/Symfony/Component/WebLink/EventListener/AddLinkHeaderListener.php
@@ -52,6 +52,6 @@ class AddLinkHeaderListener implements EventSubscriberInterface
      */
     public static function getSubscribedEvents()
     {
-        return array(KernelEvents::RESPONSE => 'onKernelResponse');
+        return [KernelEvents::RESPONSE => 'onKernelResponse'];
     }
 }
diff --git a/src/Symfony/Component/WebLink/HttpHeaderSerializer.php b/src/Symfony/Component/WebLink/HttpHeaderSerializer.php
index bcc04acf23..6c7a039326 100644
--- a/src/Symfony/Component/WebLink/HttpHeaderSerializer.php
+++ b/src/Symfony/Component/WebLink/HttpHeaderSerializer.php
@@ -31,13 +31,13 @@ final class HttpHeaderSerializer
      */
     public function serialize(iterable $links)
     {
-        $elements = array();
+        $elements = [];
         foreach ($links as $link) {
             if ($link->isTemplated()) {
                 continue;
             }
 
-            $attributesParts = array('', sprintf('rel="%s"', implode(' ', $link->getRels())));
+            $attributesParts = ['', sprintf('rel="%s"', implode(' ', $link->getRels()))];
             foreach ($link->getAttributes() as $key => $value) {
                 if (\is_array($value)) {
                     foreach ($value as $v) {
diff --git a/src/Symfony/Component/WebLink/Tests/EventListener/AddLinkHeaderListenerTest.php b/src/Symfony/Component/WebLink/Tests/EventListener/AddLinkHeaderListenerTest.php
index c592eb231c..5a71471578 100644
--- a/src/Symfony/Component/WebLink/Tests/EventListener/AddLinkHeaderListenerTest.php
+++ b/src/Symfony/Component/WebLink/Tests/EventListener/AddLinkHeaderListenerTest.php
@@ -28,8 +28,8 @@ class AddLinkHeaderListenerTest extends TestCase
 {
     public function testOnKernelResponse()
     {
-        $request = new Request(array(), array(), array('_links' => new GenericLinkProvider(array(new Link('preload', '/foo')))));
-        $response = new Response('', 200, array('Link' => '<https://demo.api-platform.com/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"'));
+        $request = new Request([], [], ['_links' => new GenericLinkProvider([new Link('preload', '/foo')])]);
+        $response = new Response('', 200, ['Link' => '<https://demo.api-platform.com/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"']);
 
         $subscriber = new AddLinkHeaderListener();
 
@@ -42,16 +42,16 @@ class AddLinkHeaderListenerTest extends TestCase
 
         $this->assertInstanceOf(EventSubscriberInterface::class, $subscriber);
 
-        $expected = array(
+        $expected = [
             '<https://demo.api-platform.com/docs.jsonld>; rel="http://www.w3.org/ns/hydra/core#apiDocumentation"',
             '</foo>; rel="preload"',
-        );
+        ];
 
         $this->assertEquals($expected, $response->headers->get('Link', null, false));
     }
 
     public function testSubscribedEvents()
     {
-        $this->assertEquals(array(KernelEvents::RESPONSE => 'onKernelResponse'), AddLinkHeaderListener::getSubscribedEvents());
+        $this->assertEquals([KernelEvents::RESPONSE => 'onKernelResponse'], AddLinkHeaderListener::getSubscribedEvents());
     }
 }
diff --git a/src/Symfony/Component/WebLink/Tests/HttpHeaderSerializerTest.php b/src/Symfony/Component/WebLink/Tests/HttpHeaderSerializerTest.php
index 553371fbb4..fb4bbd96f2 100644
--- a/src/Symfony/Component/WebLink/Tests/HttpHeaderSerializerTest.php
+++ b/src/Symfony/Component/WebLink/Tests/HttpHeaderSerializerTest.php
@@ -29,19 +29,19 @@ class HttpHeaderSerializerTest extends TestCase
 
     public function testSerialize()
     {
-        $links = array(
+        $links = [
             new Link('prerender', '/1'),
             (new Link('dns-prefetch', '/2'))->withAttribute('pr', 0.7),
             (new Link('preload', '/3'))->withAttribute('as', 'script')->withAttribute('nopush', false),
             (new Link('preload', '/4'))->withAttribute('as', 'image')->withAttribute('nopush', true),
-            (new Link('alternate', '/5'))->withRel('next')->withAttribute('hreflang', array('fr', 'de'))->withAttribute('title', 'Hello'),
-        );
+            (new Link('alternate', '/5'))->withRel('next')->withAttribute('hreflang', ['fr', 'de'])->withAttribute('title', 'Hello'),
+        ];
 
         $this->assertEquals('</1>; rel="prerender",</2>; rel="dns-prefetch"; pr="0.7",</3>; rel="preload"; as="script",</4>; rel="preload"; as="image"; nopush,</5>; rel="alternate next"; hreflang="fr"; hreflang="de"; title="Hello"', $this->serializer->serialize($links));
     }
 
     public function testSerializeEmpty()
     {
-        $this->assertNull($this->serializer->serialize(array()));
+        $this->assertNull($this->serializer->serialize([]));
     }
 }
diff --git a/src/Symfony/Component/Workflow/Definition.php b/src/Symfony/Component/Workflow/Definition.php
index ccab6101cf..f614d46a30 100644
--- a/src/Symfony/Component/Workflow/Definition.php
+++ b/src/Symfony/Component/Workflow/Definition.php
@@ -22,8 +22,8 @@ use Symfony\Component\Workflow\Metadata\MetadataStoreInterface;
  */
 final class Definition
 {
-    private $places = array();
-    private $transitions = array();
+    private $places = [];
+    private $transitions = [];
     private $initialPlace;
     private $metadataStore;
 
diff --git a/src/Symfony/Component/Workflow/DefinitionBuilder.php b/src/Symfony/Component/Workflow/DefinitionBuilder.php
index 308f950324..8fa90471dd 100644
--- a/src/Symfony/Component/Workflow/DefinitionBuilder.php
+++ b/src/Symfony/Component/Workflow/DefinitionBuilder.php
@@ -22,8 +22,8 @@ use Symfony\Component\Workflow\Metadata\MetadataStoreInterface;
  */
 class DefinitionBuilder
 {
-    private $places = array();
-    private $transitions = array();
+    private $places = [];
+    private $transitions = [];
     private $initialPlace;
     private $metadataStore;
 
@@ -31,7 +31,7 @@ class DefinitionBuilder
      * @param string[]     $places
      * @param Transition[] $transitions
      */
-    public function __construct(array $places = array(), array $transitions = array())
+    public function __construct(array $places = [], array $transitions = [])
     {
         $this->addPlaces($places);
         $this->addTransitions($transitions);
@@ -52,8 +52,8 @@ class DefinitionBuilder
      */
     public function clear()
     {
-        $this->places = array();
-        $this->transitions = array();
+        $this->places = [];
+        $this->transitions = [];
         $this->initialPlace = null;
         $this->metadataStore = null;
 
diff --git a/src/Symfony/Component/Workflow/Dumper/DumperInterface.php b/src/Symfony/Component/Workflow/Dumper/DumperInterface.php
index b0eebd34f1..797c63e32b 100644
--- a/src/Symfony/Component/Workflow/Dumper/DumperInterface.php
+++ b/src/Symfony/Component/Workflow/Dumper/DumperInterface.php
@@ -31,5 +31,5 @@ interface DumperInterface
      *
      * @return string The representation of the workflow
      */
-    public function dump(Definition $definition, Marking $marking = null, array $options = array());
+    public function dump(Definition $definition, Marking $marking = null, array $options = []);
 }
diff --git a/src/Symfony/Component/Workflow/Dumper/GraphvizDumper.php b/src/Symfony/Component/Workflow/Dumper/GraphvizDumper.php
index b7c7d8fd4f..f8c0fa5457 100644
--- a/src/Symfony/Component/Workflow/Dumper/GraphvizDumper.php
+++ b/src/Symfony/Component/Workflow/Dumper/GraphvizDumper.php
@@ -26,11 +26,11 @@ use Symfony\Component\Workflow\Marking;
  */
 class GraphvizDumper implements DumperInterface
 {
-    protected static $defaultOptions = array(
-        'graph' => array('ratio' => 'compress', 'rankdir' => 'LR'),
-        'node' => array('fontsize' => 9, 'fontname' => 'Arial', 'color' => '#333333', 'fillcolor' => 'lightblue', 'fixedsize' => 'false', 'width' => 1),
-        'edge' => array('fontsize' => 9, 'fontname' => 'Arial', 'color' => '#333333', 'arrowhead' => 'normal', 'arrowsize' => 0.5),
-    );
+    protected static $defaultOptions = [
+        'graph' => ['ratio' => 'compress', 'rankdir' => 'LR'],
+        'node' => ['fontsize' => 9, 'fontname' => 'Arial', 'color' => '#333333', 'fillcolor' => 'lightblue', 'fixedsize' => 'false', 'width' => 1],
+        'edge' => ['fontsize' => 9, 'fontname' => 'Arial', 'color' => '#333333', 'arrowhead' => 'normal', 'arrowsize' => 0.5],
+    ];
 
     /**
      * {@inheritdoc}
@@ -43,7 +43,7 @@ class GraphvizDumper implements DumperInterface
      *  * node: The default options for nodes (places + transitions)
      *  * edge: The default options for edges
      */
-    public function dump(Definition $definition, Marking $marking = null, array $options = array())
+    public function dump(Definition $definition, Marking $marking = null, array $options = [])
     {
         $places = $this->findPlaces($definition, $marking);
         $transitions = $this->findTransitions($definition);
@@ -63,10 +63,10 @@ class GraphvizDumper implements DumperInterface
      */
     protected function findPlaces(Definition $definition, Marking $marking = null)
     {
-        $places = array();
+        $places = [];
 
         foreach ($definition->getPlaces() as $place) {
-            $attributes = array();
+            $attributes = [];
             if ($place === $definition->getInitialPlace()) {
                 $attributes['style'] = 'filled';
             }
@@ -74,9 +74,9 @@ class GraphvizDumper implements DumperInterface
                 $attributes['color'] = '#FF0000';
                 $attributes['shape'] = 'doublecircle';
             }
-            $places[$place] = array(
+            $places[$place] = [
                 'attributes' => $attributes,
-            );
+            ];
         }
 
         return $places;
@@ -87,13 +87,13 @@ class GraphvizDumper implements DumperInterface
      */
     protected function findTransitions(Definition $definition)
     {
-        $transitions = array();
+        $transitions = [];
 
         foreach ($definition->getTransitions() as $transition) {
-            $transitions[] = array(
-                'attributes' => array('shape' => 'box', 'regular' => true),
+            $transitions[] = [
+                'attributes' => ['shape' => 'box', 'regular' => true],
                 'name' => $transition->getName(),
-            );
+            ];
         }
 
         return $transitions;
@@ -132,22 +132,22 @@ class GraphvizDumper implements DumperInterface
      */
     protected function findEdges(Definition $definition)
     {
-        $dotEdges = array();
+        $dotEdges = [];
 
         foreach ($definition->getTransitions() as $transition) {
             foreach ($transition->getFroms() as $from) {
-                $dotEdges[] = array(
+                $dotEdges[] = [
                     'from' => $from,
                     'to' => $transition->getName(),
                     'direction' => 'from',
-                );
+                ];
             }
             foreach ($transition->getTos() as $to) {
-                $dotEdges[] = array(
+                $dotEdges[] = [
                     'from' => $transition->getName(),
                     'to' => $to,
                     'direction' => 'to',
-                );
+                ];
             }
         }
 
@@ -211,7 +211,7 @@ class GraphvizDumper implements DumperInterface
 
     private function addAttributes(array $attributes): string
     {
-        $code = array();
+        $code = [];
 
         foreach ($attributes as $k => $v) {
             $code[] = sprintf('%s="%s"', $k, $this->escape($v));
@@ -222,7 +222,7 @@ class GraphvizDumper implements DumperInterface
 
     private function addOptions(array $options): string
     {
-        $code = array();
+        $code = [];
 
         foreach ($options as $k => $v) {
             $code[] = sprintf('%s="%s"', $k, $v);
diff --git a/src/Symfony/Component/Workflow/Dumper/PlantUmlDumper.php b/src/Symfony/Component/Workflow/Dumper/PlantUmlDumper.php
index 84842a3955..e5e3869824 100644
--- a/src/Symfony/Component/Workflow/Dumper/PlantUmlDumper.php
+++ b/src/Symfony/Component/Workflow/Dumper/PlantUmlDumper.php
@@ -31,24 +31,24 @@ class PlantUmlDumper implements DumperInterface
 
     const STATEMACHINE_TRANSITION = 'arrow';
     const WORKFLOW_TRANSITION = 'square';
-    const TRANSITION_TYPES = array(self::STATEMACHINE_TRANSITION, self::WORKFLOW_TRANSITION);
-    const DEFAULT_OPTIONS = array(
-        'skinparams' => array(
+    const TRANSITION_TYPES = [self::STATEMACHINE_TRANSITION, self::WORKFLOW_TRANSITION];
+    const DEFAULT_OPTIONS = [
+        'skinparams' => [
             'titleBorderRoundCorner' => 15,
             'titleBorderThickness' => 2,
-            'state' => array(
+            'state' => [
                 'BackgroundColor'.self::INITIAL => '#87b741',
                 'BackgroundColor'.self::MARKED => '#3887C6',
                 'BorderColor' => '#3887C6',
                 'BorderColor'.self::MARKED => 'Black',
                 'FontColor'.self::MARKED => 'White',
-            ),
-            'agent' => array(
+            ],
+            'agent' => [
                 'BackgroundColor' => '#ffffff',
                 'BorderColor' => '#3887C6',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     private $transitionType = self::STATEMACHINE_TRANSITION;
 
@@ -60,7 +60,7 @@ class PlantUmlDumper implements DumperInterface
         $this->transitionType = $transitionType;
     }
 
-    public function dump(Definition $definition, Marking $marking = null, array $options = array()): string
+    public function dump(Definition $definition, Marking $marking = null, array $options = []): string
     {
         $options = array_replace_recursive(self::DEFAULT_OPTIONS, $options);
         $code = $this->initialize($options);
@@ -84,10 +84,10 @@ class PlantUmlDumper implements DumperInterface
                 foreach ($transition->getTos() as $to) {
                     $toEscaped = $this->escape($to);
                     if ($this->isWorkflowTransitionType()) {
-                        $lines = array(
+                        $lines = [
                             "$fromEscaped --> $transitionEscaped",
                             "$transitionEscaped --> $toEscaped",
-                        );
+                        ];
                         foreach ($lines as $line) {
                             if (!\in_array($line, $code)) {
                                 $code[] = $line;
@@ -128,7 +128,7 @@ class PlantUmlDumper implements DumperInterface
 
     private function initialize(array $options): array
     {
-        $code = array();
+        $code = [];
         if (isset($options['title'])) {
             $code[] = "title {$options['title']}";
         }
diff --git a/src/Symfony/Component/Workflow/Dumper/StateMachineGraphvizDumper.php b/src/Symfony/Component/Workflow/Dumper/StateMachineGraphvizDumper.php
index e73517581a..dac6730de8 100644
--- a/src/Symfony/Component/Workflow/Dumper/StateMachineGraphvizDumper.php
+++ b/src/Symfony/Component/Workflow/Dumper/StateMachineGraphvizDumper.php
@@ -27,7 +27,7 @@ class StateMachineGraphvizDumper extends GraphvizDumper
      *  * node: The default options for nodes (places)
      *  * edge: The default options for edges
      */
-    public function dump(Definition $definition, Marking $marking = null, array $options = array())
+    public function dump(Definition $definition, Marking $marking = null, array $options = [])
     {
         $places = $this->findPlaces($definition, $marking);
         $edges = $this->findEdges($definition);
@@ -46,15 +46,15 @@ class StateMachineGraphvizDumper extends GraphvizDumper
      */
     protected function findEdges(Definition $definition)
     {
-        $edges = array();
+        $edges = [];
 
         foreach ($definition->getTransitions() as $transition) {
             foreach ($transition->getFroms() as $from) {
                 foreach ($transition->getTos() as $to) {
-                    $edges[$from][] = array(
+                    $edges[$from][] = [
                         'name' => $transition->getName(),
                         'to' => $to,
-                    );
+                    ];
                 }
             }
         }
diff --git a/src/Symfony/Component/Workflow/EventListener/AuditTrailListener.php b/src/Symfony/Component/Workflow/EventListener/AuditTrailListener.php
index ba56b58601..95a9590cef 100644
--- a/src/Symfony/Component/Workflow/EventListener/AuditTrailListener.php
+++ b/src/Symfony/Component/Workflow/EventListener/AuditTrailListener.php
@@ -48,10 +48,10 @@ class AuditTrailListener implements EventSubscriberInterface
 
     public static function getSubscribedEvents()
     {
-        return array(
-            'workflow.leave' => array('onLeave'),
-            'workflow.transition' => array('onTransition'),
-            'workflow.enter' => array('onEnter'),
-        );
+        return [
+            'workflow.leave' => ['onLeave'],
+            'workflow.transition' => ['onTransition'],
+            'workflow.enter' => ['onEnter'],
+        ];
     }
 }
diff --git a/src/Symfony/Component/Workflow/EventListener/GuardListener.php b/src/Symfony/Component/Workflow/EventListener/GuardListener.php
index b95d91ae4a..3a9b417f67 100644
--- a/src/Symfony/Component/Workflow/EventListener/GuardListener.php
+++ b/src/Symfony/Component/Workflow/EventListener/GuardListener.php
@@ -86,7 +86,7 @@ class GuardListener
             $roles = $token->getRoles();
         }
 
-        $variables = array(
+        $variables = [
             'token' => $token,
             'user' => $token->getUser(),
             'subject' => $event->getSubject(),
@@ -99,7 +99,7 @@ class GuardListener
             'trust_resolver' => $this->trustResolver,
             // needed for the is_valid expression function
             'validator' => $this->validator,
-        );
+        ];
 
         return $variables;
     }
diff --git a/src/Symfony/Component/Workflow/Marking.php b/src/Symfony/Component/Workflow/Marking.php
index d44ae9fb08..8cb2dbedb8 100644
--- a/src/Symfony/Component/Workflow/Marking.php
+++ b/src/Symfony/Component/Workflow/Marking.php
@@ -18,12 +18,12 @@ namespace Symfony\Component\Workflow;
  */
 class Marking
 {
-    private $places = array();
+    private $places = [];
 
     /**
      * @param int[] $representation Keys are the place name and values should be 1
      */
-    public function __construct(array $representation = array())
+    public function __construct(array $representation = [])
     {
         foreach ($representation as $place => $nbToken) {
             $this->mark($place);
diff --git a/src/Symfony/Component/Workflow/MarkingStore/MultipleStateMarkingStore.php b/src/Symfony/Component/Workflow/MarkingStore/MultipleStateMarkingStore.php
index cc3acb48c2..3ac0ff5827 100644
--- a/src/Symfony/Component/Workflow/MarkingStore/MultipleStateMarkingStore.php
+++ b/src/Symfony/Component/Workflow/MarkingStore/MultipleStateMarkingStore.php
@@ -40,7 +40,7 @@ class MultipleStateMarkingStore implements MarkingStoreInterface
      */
     public function getMarking($subject)
     {
-        return new Marking($this->propertyAccessor->getValue($subject, $this->property) ?: array());
+        return new Marking($this->propertyAccessor->getValue($subject, $this->property) ?: []);
     }
 
     /**
diff --git a/src/Symfony/Component/Workflow/MarkingStore/SingleStateMarkingStore.php b/src/Symfony/Component/Workflow/MarkingStore/SingleStateMarkingStore.php
index 1da179db64..806b33340c 100644
--- a/src/Symfony/Component/Workflow/MarkingStore/SingleStateMarkingStore.php
+++ b/src/Symfony/Component/Workflow/MarkingStore/SingleStateMarkingStore.php
@@ -45,7 +45,7 @@ class SingleStateMarkingStore implements MarkingStoreInterface
             return new Marking();
         }
 
-        return new Marking(array($placeName => 1));
+        return new Marking([$placeName => 1]);
     }
 
     /**
diff --git a/src/Symfony/Component/Workflow/Metadata/InMemoryMetadataStore.php b/src/Symfony/Component/Workflow/Metadata/InMemoryMetadataStore.php
index 7ab1eeede9..5e8b9c4f78 100644
--- a/src/Symfony/Component/Workflow/Metadata/InMemoryMetadataStore.php
+++ b/src/Symfony/Component/Workflow/Metadata/InMemoryMetadataStore.php
@@ -24,7 +24,7 @@ final class InMemoryMetadataStore implements MetadataStoreInterface
     private $placesMetadata;
     private $transitionsMetadata;
 
-    public function __construct(array $workflowMetadata = array(), array $placesMetadata = array(), \SplObjectStorage $transitionsMetadata = null)
+    public function __construct(array $workflowMetadata = [], array $placesMetadata = [], \SplObjectStorage $transitionsMetadata = null)
     {
         $this->workflowMetadata = $workflowMetadata;
         $this->placesMetadata = $placesMetadata;
@@ -38,11 +38,11 @@ final class InMemoryMetadataStore implements MetadataStoreInterface
 
     public function getPlaceMetadata(string $place): array
     {
-        return $this->placesMetadata[$place] ?? array();
+        return $this->placesMetadata[$place] ?? [];
     }
 
     public function getTransitionMetadata(Transition $transition): array
     {
-        return $this->transitionsMetadata[$transition] ?? array();
+        return $this->transitionsMetadata[$transition] ?? [];
     }
 }
diff --git a/src/Symfony/Component/Workflow/Registry.php b/src/Symfony/Component/Workflow/Registry.php
index c675d8e21e..f1a2df98e6 100644
--- a/src/Symfony/Component/Workflow/Registry.php
+++ b/src/Symfony/Component/Workflow/Registry.php
@@ -21,7 +21,7 @@ use Symfony\Component\Workflow\SupportStrategy\WorkflowSupportStrategyInterface;
  */
 class Registry
 {
-    private $workflows = array();
+    private $workflows = [];
 
     /**
      * @param Workflow                 $workflow
@@ -32,12 +32,12 @@ class Registry
     public function add(Workflow $workflow, $supportStrategy)
     {
         @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.1. Use addWorkflow() instead.', __METHOD__), E_USER_DEPRECATED);
-        $this->workflows[] = array($workflow, $supportStrategy);
+        $this->workflows[] = [$workflow, $supportStrategy];
     }
 
     public function addWorkflow(WorkflowInterface $workflow, WorkflowSupportStrategyInterface $supportStrategy)
     {
-        $this->workflows[] = array($workflow, $supportStrategy);
+        $this->workflows[] = [$workflow, $supportStrategy];
     }
 
     /**
@@ -73,7 +73,7 @@ class Registry
      */
     public function all($subject): array
     {
-        $matched = array();
+        $matched = [];
         foreach ($this->workflows as list($workflow, $supportStrategy)) {
             if ($supportStrategy->supports($workflow, $subject)) {
                 $matched[] = $workflow;
diff --git a/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php b/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
index 1af7a32693..fdc4703a1b 100644
--- a/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
+++ b/src/Symfony/Component/Workflow/Tests/DefinitionBuilderTest.php
@@ -11,7 +11,7 @@ class DefinitionBuilderTest extends TestCase
 {
     public function testSetInitialPlace()
     {
-        $builder = new DefinitionBuilder(array('a', 'b'));
+        $builder = new DefinitionBuilder(['a', 'b']);
         $builder->setInitialPlace('b');
         $definition = $builder->build();
 
@@ -24,7 +24,7 @@ class DefinitionBuilderTest extends TestCase
 
         $transition0 = new Transition('name0', $places[0], $places[1]);
         $transition1 = new Transition('name1', $places[0], $places[1]);
-        $builder = new DefinitionBuilder($places, array($transition0));
+        $builder = new DefinitionBuilder($places, [$transition0]);
         $builder->addTransition($transition1);
 
         $definition = $builder->build();
@@ -36,7 +36,7 @@ class DefinitionBuilderTest extends TestCase
 
     public function testAddPlace()
     {
-        $builder = new DefinitionBuilder(array('a'), array());
+        $builder = new DefinitionBuilder(['a'], []);
         $builder->addPlace('b');
 
         $definition = $builder->build();
@@ -48,7 +48,7 @@ class DefinitionBuilderTest extends TestCase
 
     public function testSetMetadataStore()
     {
-        $builder = new DefinitionBuilder(array('a'));
+        $builder = new DefinitionBuilder(['a']);
         $metadataStore = new InMemoryMetadataStore();
         $builder->setMetadataStore($metadataStore);
         $definition = $builder->build();
diff --git a/src/Symfony/Component/Workflow/Tests/DefinitionTest.php b/src/Symfony/Component/Workflow/Tests/DefinitionTest.php
index 92e517df2f..e10aad81cf 100644
--- a/src/Symfony/Component/Workflow/Tests/DefinitionTest.php
+++ b/src/Symfony/Component/Workflow/Tests/DefinitionTest.php
@@ -11,7 +11,7 @@ class DefinitionTest extends TestCase
     public function testAddPlaces()
     {
         $places = range('a', 'e');
-        $definition = new Definition($places, array());
+        $definition = new Definition($places, []);
 
         $this->assertCount(5, $definition->getPlaces());
 
@@ -21,7 +21,7 @@ class DefinitionTest extends TestCase
     public function testSetInitialPlace()
     {
         $places = range('a', 'e');
-        $definition = new Definition($places, array(), $places[3]);
+        $definition = new Definition($places, [], $places[3]);
 
         $this->assertEquals($places[3], $definition->getInitialPlace());
     }
@@ -32,7 +32,7 @@ class DefinitionTest extends TestCase
      */
     public function testSetInitialPlaceAndPlaceIsNotDefined()
     {
-        $definition = new Definition(array(), array(), 'd');
+        $definition = new Definition([], [], 'd');
     }
 
     public function testAddTransition()
@@ -40,7 +40,7 @@ class DefinitionTest extends TestCase
         $places = range('a', 'b');
 
         $transition = new Transition('name', $places[0], $places[1]);
-        $definition = new Definition($places, array($transition));
+        $definition = new Definition($places, [$transition]);
 
         $this->assertCount(1, $definition->getTransitions());
         $this->assertSame($transition, $definition->getTransitions()[0]);
@@ -54,7 +54,7 @@ class DefinitionTest extends TestCase
     {
         $places = range('a', 'b');
 
-        new Definition($places, array(new Transition('name', 'c', $places[1])));
+        new Definition($places, [new Transition('name', 'c', $places[1])]);
     }
 
     /**
@@ -65,6 +65,6 @@ class DefinitionTest extends TestCase
     {
         $places = range('a', 'b');
 
-        new Definition($places, array(new Transition('name', $places[0], 'c')));
+        new Definition($places, [new Transition('name', $places[0], 'c')]);
     }
 }
diff --git a/src/Symfony/Component/Workflow/Tests/DependencyInjection/ValidateWorkflowsPassTest.php b/src/Symfony/Component/Workflow/Tests/DependencyInjection/ValidateWorkflowsPassTest.php
index 1a38588f27..c9cb840249 100644
--- a/src/Symfony/Component/Workflow/Tests/DependencyInjection/ValidateWorkflowsPassTest.php
+++ b/src/Symfony/Component/Workflow/Tests/DependencyInjection/ValidateWorkflowsPassTest.php
@@ -15,18 +15,18 @@ class ValidateWorkflowsPassTest extends TestCase
     {
         $container = new ContainerBuilder();
         $container->register('definition1', WorkflowDefinition::class)
-            ->addArgument(array('a', 'b', 'c'))
-            ->addArgument(array(
-                new Definition(Transition::class, array('t1', 'a', 'b')),
-                new Definition(Transition::class, array('t2', 'a', 'c')),
-            ))
-            ->addTag('workflow.definition', array('name' => 'wf1', 'type' => 'state_machine', 'marking_store' => 'foo'));
+            ->addArgument(['a', 'b', 'c'])
+            ->addArgument([
+                new Definition(Transition::class, ['t1', 'a', 'b']),
+                new Definition(Transition::class, ['t2', 'a', 'c']),
+            ])
+            ->addTag('workflow.definition', ['name' => 'wf1', 'type' => 'state_machine', 'marking_store' => 'foo']);
 
         (new ValidateWorkflowsPass())->process($container);
 
         $workflowDefinition = $container->get('definition1');
 
-        $this->assertSame(array('a' => 'a', 'b' => 'b', 'c' => 'c'), $workflowDefinition->getPlaces());
-        $this->assertEquals(array(new Transition('t1', 'a', 'b'), new Transition('t2', 'a', 'c')), $workflowDefinition->getTransitions());
+        $this->assertSame(['a' => 'a', 'b' => 'b', 'c' => 'c'], $workflowDefinition->getPlaces());
+        $this->assertEquals([new Transition('t1', 'a', 'b'), new Transition('t2', 'a', 'c')], $workflowDefinition->getTransitions());
     }
 }
diff --git a/src/Symfony/Component/Workflow/Tests/Dumper/GraphvizDumperTest.php b/src/Symfony/Component/Workflow/Tests/Dumper/GraphvizDumperTest.php
index a1d70cca6b..0d14404d2e 100644
--- a/src/Symfony/Component/Workflow/Tests/Dumper/GraphvizDumperTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Dumper/GraphvizDumperTest.php
@@ -40,23 +40,23 @@ class GraphvizDumperTest extends TestCase
 
     public function provideWorkflowDefinitionWithMarking()
     {
-        yield array(
+        yield [
             $this->createComplexWorkflowDefinition(),
-            new Marking(array('b' => 1)),
+            new Marking(['b' => 1]),
             $this->createComplexWorkflowDefinitionDumpWithMarking(),
-        );
+        ];
 
-        yield array(
+        yield [
             $this->createSimpleWorkflowDefinition(),
-            new Marking(array('c' => 1, 'd' => 1)),
+            new Marking(['c' => 1, 'd' => 1]),
             $this->createSimpleWorkflowDumpWithMarking(),
-        );
+        ];
     }
 
     public function provideWorkflowDefinitionWithoutMarking()
     {
-        yield array($this->createComplexWorkflowDefinition(), $this->provideComplexWorkflowDumpWithoutMarking());
-        yield array($this->createSimpleWorkflowDefinition(), $this->provideSimpleWorkflowDumpWithoutMarking());
+        yield [$this->createComplexWorkflowDefinition(), $this->provideComplexWorkflowDumpWithoutMarking()];
+        yield [$this->createSimpleWorkflowDefinition(), $this->provideSimpleWorkflowDumpWithoutMarking()];
     }
 
     public function createComplexWorkflowDefinitionDumpWithMarking()
diff --git a/src/Symfony/Component/Workflow/Tests/Dumper/PlantUmlDumperTest.php b/src/Symfony/Component/Workflow/Tests/Dumper/PlantUmlDumperTest.php
index 8469415255..c8c285bdab 100644
--- a/src/Symfony/Component/Workflow/Tests/Dumper/PlantUmlDumperTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Dumper/PlantUmlDumperTest.php
@@ -25,7 +25,7 @@ class PlantUmlDumperTest extends TestCase
     public function testDumpWorkflowWithoutMarking($definition, $marking, $expectedFileName, $title)
     {
         $dumper = new PlantUmlDumper(PlantUmlDumper::WORKFLOW_TRANSITION);
-        $dump = $dumper->dump($definition, $marking, array('title' => $title));
+        $dump = $dumper->dump($definition, $marking, ['title' => $title]);
         // handle windows, and avoid to create more fixtures
         $dump = str_replace(PHP_EOL, "\n", $dump.PHP_EOL);
         $file = $this->getFixturePath($expectedFileName, PlantUmlDumper::WORKFLOW_TRANSITION);
@@ -34,12 +34,12 @@ class PlantUmlDumperTest extends TestCase
 
     public function provideWorkflowDefinitionWithoutMarking()
     {
-        yield array($this->createSimpleWorkflowDefinition(), null, 'simple-workflow-nomarking', 'SimpleDiagram');
-        yield array($this->createComplexWorkflowDefinition(), null, 'complex-workflow-nomarking', 'ComplexDiagram');
-        $marking = new Marking(array('b' => 1));
-        yield array($this->createSimpleWorkflowDefinition(), $marking, 'simple-workflow-marking', 'SimpleDiagram');
-        $marking = new Marking(array('c' => 1, 'e' => 1));
-        yield array($this->createComplexWorkflowDefinition(), $marking, 'complex-workflow-marking', 'ComplexDiagram');
+        yield [$this->createSimpleWorkflowDefinition(), null, 'simple-workflow-nomarking', 'SimpleDiagram'];
+        yield [$this->createComplexWorkflowDefinition(), null, 'complex-workflow-nomarking', 'ComplexDiagram'];
+        $marking = new Marking(['b' => 1]);
+        yield [$this->createSimpleWorkflowDefinition(), $marking, 'simple-workflow-marking', 'SimpleDiagram'];
+        $marking = new Marking(['c' => 1, 'e' => 1]);
+        yield [$this->createComplexWorkflowDefinition(), $marking, 'complex-workflow-marking', 'ComplexDiagram'];
     }
 
     /**
@@ -48,7 +48,7 @@ class PlantUmlDumperTest extends TestCase
     public function testDumpStateMachineWithoutMarking($definition, $marking, $expectedFileName, $title)
     {
         $dumper = new PlantUmlDumper(PlantUmlDumper::STATEMACHINE_TRANSITION);
-        $dump = $dumper->dump($definition, $marking, array('title' => $title));
+        $dump = $dumper->dump($definition, $marking, ['title' => $title]);
         // handle windows, and avoid to create more fixtures
         $dump = str_replace(PHP_EOL, "\n", $dump.PHP_EOL);
         $file = $this->getFixturePath($expectedFileName, PlantUmlDumper::STATEMACHINE_TRANSITION);
@@ -57,9 +57,9 @@ class PlantUmlDumperTest extends TestCase
 
     public function provideStateMachineDefinitionWithoutMarking()
     {
-        yield array($this->createComplexStateMachineDefinition(), null, 'complex-state-machine-nomarking', 'SimpleDiagram');
-        $marking = new Marking(array('c' => 1, 'e' => 1));
-        yield array($this->createComplexStateMachineDefinition(), $marking, 'complex-state-machine-marking', 'SimpleDiagram');
+        yield [$this->createComplexStateMachineDefinition(), null, 'complex-state-machine-nomarking', 'SimpleDiagram'];
+        $marking = new Marking(['c' => 1, 'e' => 1]);
+        yield [$this->createComplexStateMachineDefinition(), $marking, 'complex-state-machine-marking', 'SimpleDiagram'];
     }
 
     private function getFixturePath($name, $transitionType)
diff --git a/src/Symfony/Component/Workflow/Tests/Dumper/StateMachineGraphvizDumperTest.php b/src/Symfony/Component/Workflow/Tests/Dumper/StateMachineGraphvizDumperTest.php
index 8689269c63..6d79e83db8 100644
--- a/src/Symfony/Component/Workflow/Tests/Dumper/StateMachineGraphvizDumperTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Dumper/StateMachineGraphvizDumperTest.php
@@ -48,7 +48,7 @@ EOGRAPH;
     public function testDumpWithMarking()
     {
         $definition = $this->createComplexStateMachineDefinition();
-        $marking = new Marking(array('b' => 1));
+        $marking = new Marking(['b' => 1]);
 
         $expected = <<<'EOGRAPH'
 digraph workflow {
diff --git a/src/Symfony/Component/Workflow/Tests/EventListener/AuditTrailListenerTest.php b/src/Symfony/Component/Workflow/Tests/EventListener/AuditTrailListenerTest.php
index beee3664cd..8fab0e9ec7 100644
--- a/src/Symfony/Component/Workflow/Tests/EventListener/AuditTrailListenerTest.php
+++ b/src/Symfony/Component/Workflow/Tests/EventListener/AuditTrailListenerTest.php
@@ -30,11 +30,11 @@ class AuditTrailListenerTest extends TestCase
 
         $workflow->apply($object, 't1');
 
-        $expected = array(
+        $expected = [
             'Leaving "a" for subject of class "stdClass" in workflow "unnamed".',
             'Transition "t1" for subject of class "stdClass" in workflow "unnamed".',
             'Entering "b" for subject of class "stdClass" in workflow "unnamed".',
-        );
+        ];
 
         $this->assertSame($expected, $logger->logs);
     }
@@ -42,9 +42,9 @@ class AuditTrailListenerTest extends TestCase
 
 class Logger extends AbstractLogger
 {
-    public $logs = array();
+    public $logs = [];
 
-    public function log($level, $message, array $context = array())
+    public function log($level, $message, array $context = [])
     {
         $this->logs[] = $message;
     }
diff --git a/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php b/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
index c898828138..64df594b23 100644
--- a/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
+++ b/src/Symfony/Component/Workflow/Tests/EventListener/GuardListenerTest.php
@@ -26,17 +26,17 @@ class GuardListenerTest extends TestCase
 
     protected function setUp()
     {
-        $this->configuration = array(
+        $this->configuration = [
             'test_is_granted' => 'is_granted("something")',
             'test_is_valid' => 'is_valid(subject)',
-            'test_expression' => array(
+            'test_expression' => [
                 new GuardExpression(new Transition('name', 'from', 'to'), '!is_valid(subject)'),
                 new GuardExpression(new Transition('name', 'from', 'to'), 'is_valid(subject)'),
-            ),
-        );
+            ],
+        ];
         $expressionLanguage = new ExpressionLanguage();
         $token = $this->getMockBuilder(TokenInterface::class)->getMock();
-        $token->expects($this->any())->method('getRoles')->willReturn(array(new Role('ROLE_USER')));
+        $token->expects($this->any())->method('getRoles')->willReturn([new Role('ROLE_USER')]);
         $tokenStorage = $this->getMockBuilder(TokenStorageInterface::class)->getMock();
         $tokenStorage->expects($this->any())->method('getToken')->willReturn($token);
         $this->authenticationChecker = $this->getMockBuilder(AuthorizationCheckerInterface::class)->getMock();
@@ -173,7 +173,7 @@ class GuardListenerTest extends TestCase
         $this->validator
             ->expects($this->once())
             ->method('validate')
-            ->willReturn($valid ? array() : array('a violation'))
+            ->willReturn($valid ? [] : ['a violation'])
         ;
     }
 }
diff --git a/src/Symfony/Component/Workflow/Tests/MarkingStore/MultipleStateMarkingStoreTest.php b/src/Symfony/Component/Workflow/Tests/MarkingStore/MultipleStateMarkingStoreTest.php
index a0504af4b2..647ae42b4b 100644
--- a/src/Symfony/Component/Workflow/Tests/MarkingStore/MultipleStateMarkingStoreTest.php
+++ b/src/Symfony/Component/Workflow/Tests/MarkingStore/MultipleStateMarkingStoreTest.php
@@ -24,7 +24,7 @@ class MultipleStateMarkingStoreTest extends TestCase
 
         $markingStore->setMarking($subject, $marking);
 
-        $this->assertSame(array('first_place' => 1), $subject->myMarks);
+        $this->assertSame(['first_place' => 1], $subject->myMarks);
 
         $marking2 = $markingStore->getMarking($subject);
 
diff --git a/src/Symfony/Component/Workflow/Tests/MarkingTest.php b/src/Symfony/Component/Workflow/Tests/MarkingTest.php
index 98f031e94b..9ed6df041c 100644
--- a/src/Symfony/Component/Workflow/Tests/MarkingTest.php
+++ b/src/Symfony/Component/Workflow/Tests/MarkingTest.php
@@ -9,28 +9,28 @@ class MarkingTest extends TestCase
 {
     public function testMarking()
     {
-        $marking = new Marking(array('a' => 1));
+        $marking = new Marking(['a' => 1]);
 
         $this->assertTrue($marking->has('a'));
         $this->assertFalse($marking->has('b'));
-        $this->assertSame(array('a' => 1), $marking->getPlaces());
+        $this->assertSame(['a' => 1], $marking->getPlaces());
 
         $marking->mark('b');
 
         $this->assertTrue($marking->has('a'));
         $this->assertTrue($marking->has('b'));
-        $this->assertSame(array('a' => 1, 'b' => 1), $marking->getPlaces());
+        $this->assertSame(['a' => 1, 'b' => 1], $marking->getPlaces());
 
         $marking->unmark('a');
 
         $this->assertFalse($marking->has('a'));
         $this->assertTrue($marking->has('b'));
-        $this->assertSame(array('b' => 1), $marking->getPlaces());
+        $this->assertSame(['b' => 1], $marking->getPlaces());
 
         $marking->unmark('b');
 
         $this->assertFalse($marking->has('a'));
         $this->assertFalse($marking->has('b'));
-        $this->assertSame(array(), $marking->getPlaces());
+        $this->assertSame([], $marking->getPlaces());
     }
 }
diff --git a/src/Symfony/Component/Workflow/Tests/Metadata/InMemoryMetadataStoreTest.php b/src/Symfony/Component/Workflow/Tests/Metadata/InMemoryMetadataStoreTest.php
index f153d545c9..0ce8d9d5d8 100644
--- a/src/Symfony/Component/Workflow/Tests/Metadata/InMemoryMetadataStoreTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Metadata/InMemoryMetadataStoreTest.php
@@ -16,19 +16,19 @@ class InMemoryMetadataStoreTest extends TestCase
 
     protected function setUp()
     {
-        $workflowMetadata = array(
+        $workflowMetadata = [
             'title' => 'workflow title',
-        );
-        $placesMetadata = array(
-            'place_a' => array(
+        ];
+        $placesMetadata = [
+            'place_a' => [
                 'title' => 'place_a title',
-            ),
-        );
+            ],
+        ];
         $transitionsMetadata = new \SplObjectStorage();
-        $this->transition = new Transition('transition_1', array(), array());
-        $transitionsMetadata[$this->transition] = array(
+        $this->transition = new Transition('transition_1', [], []);
+        $transitionsMetadata[$this->transition] = [
             'title' => 'transition_1 title',
-        );
+        ];
 
         $this->store = new InMemoryMetadataStore($workflowMetadata, $placesMetadata, $transitionsMetadata);
     }
@@ -42,7 +42,7 @@ class InMemoryMetadataStoreTest extends TestCase
     public function testGetUnexistingPlaceMetadata()
     {
         $metadataBag = $this->store->getPlaceMetadata('place_b');
-        $this->assertSame(array(), $metadataBag);
+        $this->assertSame([], $metadataBag);
     }
 
     public function testGetExistingPlaceMetadata()
@@ -53,8 +53,8 @@ class InMemoryMetadataStoreTest extends TestCase
 
     public function testGetUnexistingTransitionMetadata()
     {
-        $metadataBag = $this->store->getTransitionMetadata(new Transition('transition_2', array(), array()));
-        $this->assertSame(array(), $metadataBag);
+        $metadataBag = $this->store->getTransitionMetadata(new Transition('transition_2', [], []));
+        $this->assertSame([], $metadataBag);
     }
 
     public function testGetExistingTransitionMetadata()
@@ -72,7 +72,7 @@ class InMemoryMetadataStoreTest extends TestCase
         $this->assertNull($this->store->getMetadata('description', 'place_b'));
         $this->assertSame('transition_1 title', $this->store->getMetadata('title', $this->transition));
         $this->assertNull($this->store->getMetadata('description', $this->transition));
-        $this->assertNull($this->store->getMetadata('description', new Transition('transition_2', array(), array())));
+        $this->assertNull($this->store->getMetadata('description', new Transition('transition_2', [], [])));
     }
 
     /**
diff --git a/src/Symfony/Component/Workflow/Tests/RegistryTest.php b/src/Symfony/Component/Workflow/Tests/RegistryTest.php
index 6d30d2f7e2..867046f7c5 100644
--- a/src/Symfony/Component/Workflow/Tests/RegistryTest.php
+++ b/src/Symfony/Component/Workflow/Tests/RegistryTest.php
@@ -19,9 +19,9 @@ class RegistryTest extends TestCase
     {
         $this->registry = new Registry();
 
-        $this->registry->addWorkflow(new Workflow(new Definition(array(), array()), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow1'), $this->createWorkflowSupportStrategy(Subject1::class));
-        $this->registry->addWorkflow(new Workflow(new Definition(array(), array()), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow2'), $this->createWorkflowSupportStrategy(Subject2::class));
-        $this->registry->addWorkflow(new Workflow(new Definition(array(), array()), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow3'), $this->createWorkflowSupportStrategy(Subject2::class));
+        $this->registry->addWorkflow(new Workflow(new Definition([], []), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow1'), $this->createWorkflowSupportStrategy(Subject1::class));
+        $this->registry->addWorkflow(new Workflow(new Definition([], []), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow2'), $this->createWorkflowSupportStrategy(Subject2::class));
+        $this->registry->addWorkflow(new Workflow(new Definition([], []), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow3'), $this->createWorkflowSupportStrategy(Subject2::class));
     }
 
     protected function tearDown()
@@ -37,7 +37,7 @@ class RegistryTest extends TestCase
     {
         $registry = new Registry();
 
-        $registry->add($w = new Workflow(new Definition(array(), array()), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow1'), $this->createSupportStrategy(Subject1::class));
+        $registry->add($w = new Workflow(new Definition([], []), $this->getMockBuilder(MarkingStoreInterface::class)->getMock(), $this->getMockBuilder(EventDispatcherInterface::class)->getMock(), 'workflow1'), $this->createSupportStrategy(Subject1::class));
 
         $workflow = $registry->get(new Subject1());
         $this->assertInstanceOf(Workflow::class, $workflow);
diff --git a/src/Symfony/Component/Workflow/Tests/TransitionTest.php b/src/Symfony/Component/Workflow/Tests/TransitionTest.php
index cf2d281620..14a646d509 100644
--- a/src/Symfony/Component/Workflow/Tests/TransitionTest.php
+++ b/src/Symfony/Component/Workflow/Tests/TransitionTest.php
@@ -12,7 +12,7 @@ class TransitionTest extends TestCase
         $transition = new Transition('name', 'a', 'b');
 
         $this->assertSame('name', $transition->getName());
-        $this->assertSame(array('a'), $transition->getFroms());
-        $this->assertSame(array('b'), $transition->getTos());
+        $this->assertSame(['a'], $transition->getFroms());
+        $this->assertSame(['b'], $transition->getTos());
     }
 }
diff --git a/src/Symfony/Component/Workflow/Tests/Validator/StateMachineValidatorTest.php b/src/Symfony/Component/Workflow/Tests/Validator/StateMachineValidatorTest.php
index dccbf38304..c43292899b 100644
--- a/src/Symfony/Component/Workflow/Tests/Validator/StateMachineValidatorTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Validator/StateMachineValidatorTest.php
@@ -15,7 +15,7 @@ class StateMachineValidatorTest extends TestCase
      */
     public function testWithMultipleTransitionWithSameNameShareInput()
     {
-        $places = array('a', 'b', 'c');
+        $places = ['a', 'b', 'c'];
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t1', 'a', 'c');
         $definition = new Definition($places, $transitions);
@@ -41,8 +41,8 @@ class StateMachineValidatorTest extends TestCase
      */
     public function testWithMultipleTos()
     {
-        $places = array('a', 'b', 'c');
-        $transitions[] = new Transition('t1', 'a', array('b', 'c'));
+        $places = ['a', 'b', 'c'];
+        $transitions[] = new Transition('t1', 'a', ['b', 'c']);
         $definition = new Definition($places, $transitions);
 
         (new StateMachineValidator())->validate($definition, 'foo');
@@ -66,8 +66,8 @@ class StateMachineValidatorTest extends TestCase
      */
     public function testWithMultipleFroms()
     {
-        $places = array('a', 'b', 'c');
-        $transitions[] = new Transition('t1', array('a', 'b'), 'c');
+        $places = ['a', 'b', 'c'];
+        $transitions[] = new Transition('t1', ['a', 'b'], 'c');
         $definition = new Definition($places, $transitions);
 
         (new StateMachineValidator())->validate($definition, 'foo');
@@ -87,7 +87,7 @@ class StateMachineValidatorTest extends TestCase
 
     public function testValid()
     {
-        $places = array('a', 'b', 'c');
+        $places = ['a', 'b', 'c'];
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t2', 'a', 'c');
         $definition = new Definition($places, $transitions);
diff --git a/src/Symfony/Component/Workflow/Tests/Validator/WorkflowValidatorTest.php b/src/Symfony/Component/Workflow/Tests/Validator/WorkflowValidatorTest.php
index 245617b682..cdf10ecdab 100644
--- a/src/Symfony/Component/Workflow/Tests/Validator/WorkflowValidatorTest.php
+++ b/src/Symfony/Component/Workflow/Tests/Validator/WorkflowValidatorTest.php
@@ -41,7 +41,7 @@ class WorkflowValidatorTest extends TestCase
     {
         $places = range('a', 'c');
 
-        $transitions = array();
+        $transitions = [];
         $transitions[] = new Transition('t0', 'c', 'b');
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t1', 'a', 'c');
@@ -55,7 +55,7 @@ class WorkflowValidatorTest extends TestCase
     {
         $places = range('a', 'd');
 
-        $transitions = array();
+        $transitions = [];
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t1', 'b', 'c');
         $transitions[] = new Transition('t1', 'd', 'c');
diff --git a/src/Symfony/Component/Workflow/Tests/WorkflowBuilderTrait.php b/src/Symfony/Component/Workflow/Tests/WorkflowBuilderTrait.php
index 3084be5749..b9d58e4670 100644
--- a/src/Symfony/Component/Workflow/Tests/WorkflowBuilderTrait.php
+++ b/src/Symfony/Component/Workflow/Tests/WorkflowBuilderTrait.php
@@ -11,9 +11,9 @@ trait WorkflowBuilderTrait
     {
         $places = range('a', 'g');
 
-        $transitions = array();
-        $transitions[] = new Transition('t1', 'a', array('b', 'c'));
-        $transitions[] = new Transition('t2', array('b', 'c'), 'd');
+        $transitions = [];
+        $transitions[] = new Transition('t1', 'a', ['b', 'c']);
+        $transitions[] = new Transition('t2', ['b', 'c'], 'd');
         $transitions[] = new Transition('t3', 'd', 'e');
         $transitions[] = new Transition('t4', 'd', 'f');
         $transitions[] = new Transition('t5', 'e', 'g');
@@ -37,7 +37,7 @@ trait WorkflowBuilderTrait
     {
         $places = range('a', 'c');
 
-        $transitions = array();
+        $transitions = [];
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t2', 'b', 'c');
 
@@ -53,8 +53,8 @@ trait WorkflowBuilderTrait
     {
         $places = range('a', 'c');
 
-        $transitions = array();
-        $transitions[] = new Transition('a_to_bc', 'a', array('b', 'c'));
+        $transitions = [];
+        $transitions[] = new Transition('a_to_bc', 'a', ['b', 'c']);
         $transitions[] = new Transition('b_to_c', 'b', 'c');
         $transitions[] = new Transition('to_a', 'b', 'a');
         $transitions[] = new Transition('to_a', 'c', 'a');
@@ -79,7 +79,7 @@ trait WorkflowBuilderTrait
 
     private function createComplexStateMachineDefinition()
     {
-        $places = array('a', 'b', 'c', 'd');
+        $places = ['a', 'b', 'c', 'd'];
 
         $transitions[] = new Transition('t1', 'a', 'b');
         $transitions[] = new Transition('t1', 'd', 'b');
diff --git a/src/Symfony/Component/Workflow/TransitionBlocker.php b/src/Symfony/Component/Workflow/TransitionBlocker.php
index d5307038a6..81fa1a4130 100644
--- a/src/Symfony/Component/Workflow/TransitionBlocker.php
+++ b/src/Symfony/Component/Workflow/TransitionBlocker.php
@@ -30,7 +30,7 @@ final class TransitionBlocker
      *                           blocked the transition. E.g. for a condition "distance must be larger than
      *                           5 miles", you might want to pass around the value of 5.
      */
-    public function __construct(string $message, string $code, array $parameters = array())
+    public function __construct(string $message, string $code, array $parameters = [])
     {
         $this->message = $message;
         $this->code = $code;
@@ -47,9 +47,9 @@ final class TransitionBlocker
      */
     public static function createBlockedByMarking(Marking $marking): self
     {
-        return new static('The marking does not enable the transition.', self::BLOCKED_BY_MARKING, array(
+        return new static('The marking does not enable the transition.', self::BLOCKED_BY_MARKING, [
             'marking' => $marking,
-        ));
+        ]);
     }
 
     /**
@@ -58,9 +58,9 @@ final class TransitionBlocker
      */
     public static function createBlockedByExpressionGuardListener(string $expression): self
     {
-        return new static('The expression blocks the transition.', self::BLOCKED_BY_EXPRESSION_GUARD_LISTENER, array(
+        return new static('The expression blocks the transition.', self::BLOCKED_BY_EXPRESSION_GUARD_LISTENER, [
             'expression' => $expression,
-        ));
+        ]);
     }
 
     /**
diff --git a/src/Symfony/Component/Workflow/TransitionBlockerList.php b/src/Symfony/Component/Workflow/TransitionBlockerList.php
index b7ef5a157c..8569b28fea 100644
--- a/src/Symfony/Component/Workflow/TransitionBlockerList.php
+++ b/src/Symfony/Component/Workflow/TransitionBlockerList.php
@@ -23,9 +23,9 @@ final class TransitionBlockerList implements \IteratorAggregate, \Countable
     /**
      * @param TransitionBlocker[] $blockers
      */
-    public function __construct(array $blockers = array())
+    public function __construct(array $blockers = [])
     {
-        $this->blockers = array();
+        $this->blockers = [];
 
         foreach ($blockers as $blocker) {
             $this->add($blocker);
@@ -50,7 +50,7 @@ final class TransitionBlockerList implements \IteratorAggregate, \Countable
 
     public function clear(): void
     {
-        $this->blockers = array();
+        $this->blockers = [];
     }
 
     public function isEmpty(): bool
diff --git a/src/Symfony/Component/Workflow/Validator/StateMachineValidator.php b/src/Symfony/Component/Workflow/Validator/StateMachineValidator.php
index 4f32ae5120..7dbe694940 100644
--- a/src/Symfony/Component/Workflow/Validator/StateMachineValidator.php
+++ b/src/Symfony/Component/Workflow/Validator/StateMachineValidator.php
@@ -21,7 +21,7 @@ class StateMachineValidator implements DefinitionValidatorInterface
 {
     public function validate(Definition $definition, $name)
     {
-        $transitionFromNames = array();
+        $transitionFromNames = [];
         foreach ($definition->getTransitions() as $transition) {
             // Make sure that each transition has exactly one TO
             if (1 !== \count($transition->getTos())) {
diff --git a/src/Symfony/Component/Workflow/Validator/WorkflowValidator.php b/src/Symfony/Component/Workflow/Validator/WorkflowValidator.php
index 703be54cb2..0cb420ba6a 100644
--- a/src/Symfony/Component/Workflow/Validator/WorkflowValidator.php
+++ b/src/Symfony/Component/Workflow/Validator/WorkflowValidator.php
@@ -29,7 +29,7 @@ class WorkflowValidator implements DefinitionValidatorInterface
     public function validate(Definition $definition, $name)
     {
         // Make sure all transitions for one place has unique name.
-        $places = array_fill_keys($definition->getPlaces(), array());
+        $places = array_fill_keys($definition->getPlaces(), []);
         foreach ($definition->getTransitions() as $transition) {
             foreach ($transition->getFroms() as $from) {
                 if (\in_array($transition->getName(), $places[$from])) {
diff --git a/src/Symfony/Component/Workflow/Workflow.php b/src/Symfony/Component/Workflow/Workflow.php
index 8b85516806..ff229faabd 100644
--- a/src/Symfony/Component/Workflow/Workflow.php
+++ b/src/Symfony/Component/Workflow/Workflow.php
@@ -149,7 +149,7 @@ class Workflow implements WorkflowInterface
 
         $transitionBlockerList = null;
         $applied = false;
-        $approvedTransitionQueue = array();
+        $approvedTransitionQueue = [];
 
         foreach ($this->definition->getTransitions() as $transition) {
             if ($transition->getName() !== $transitionName) {
@@ -197,7 +197,7 @@ class Workflow implements WorkflowInterface
      */
     public function getEnabledTransitions($subject)
     {
-        $enabledTransitions = array();
+        $enabledTransitions = [];
         $marking = $this->getMarking($subject);
 
         foreach ($this->definition->getTransitions() as $transition) {
@@ -246,9 +246,9 @@ class Workflow implements WorkflowInterface
     {
         foreach ($transition->getFroms() as $place) {
             if (!$marking->has($place)) {
-                return new TransitionBlockerList(array(
+                return new TransitionBlockerList([
                     TransitionBlocker::createBlockedByMarking($marking),
-                ));
+                ]);
             }
         }
 
diff --git a/src/Symfony/Component/Yaml/CHANGELOG.md b/src/Symfony/Component/Yaml/CHANGELOG.md
index c024907bd1..cfd81fad27 100644
--- a/src/Symfony/Component/Yaml/CHANGELOG.md
+++ b/src/Symfony/Component/Yaml/CHANGELOG.md
@@ -148,7 +148,7 @@ CHANGELOG
  * Added support for customizing the dumped YAML string through an optional bit field:
 
    ```php
-   Yaml::dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE | Yaml::DUMP_OBJECT);
+   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE | Yaml::DUMP_OBJECT);
    ```
 
 3.0.0
diff --git a/src/Symfony/Component/Yaml/Command/LintCommand.php b/src/Symfony/Component/Yaml/Command/LintCommand.php
index a8cdc318be..77d449cbf8 100644
--- a/src/Symfony/Component/Yaml/Command/LintCommand.php
+++ b/src/Symfony/Component/Yaml/Command/LintCommand.php
@@ -92,10 +92,10 @@ EOF
                 throw new RuntimeException('Please provide a filename or pipe file content to STDIN.');
             }
 
-            return $this->display($io, array($this->validate($stdin, $flags)));
+            return $this->display($io, [$this->validate($stdin, $flags)]);
         }
 
-        $filesInfo = array();
+        $filesInfo = [];
         foreach ($filenames as $filename) {
             if (!$this->isReadable($filename)) {
                 throw new RuntimeException(sprintf('File or directory "%s" is not readable.', $filename));
@@ -122,12 +122,12 @@ EOF
         try {
             $this->getParser()->parse($content, Yaml::PARSE_CONSTANT | $flags);
         } catch (ParseException $e) {
-            return array('file' => $file, 'line' => $e->getParsedLine(), 'valid' => false, 'message' => $e->getMessage());
+            return ['file' => $file, 'line' => $e->getParsedLine(), 'valid' => false, 'message' => $e->getMessage()];
         } finally {
             restore_error_handler();
         }
 
-        return array('file' => $file, 'valid' => true);
+        return ['file' => $file, 'valid' => true];
     }
 
     private function display(SymfonyStyle $io, array $files)
@@ -191,7 +191,7 @@ EOF
         }
 
         foreach ($this->getDirectoryIterator($fileOrDirectory) as $file) {
-            if (!\in_array($file->getExtension(), array('yml', 'yaml'))) {
+            if (!\in_array($file->getExtension(), ['yml', 'yaml'])) {
                 continue;
             }
 
diff --git a/src/Symfony/Component/Yaml/Escaper.php b/src/Symfony/Component/Yaml/Escaper.php
index 4b2559ed6e..afff1683e0 100644
--- a/src/Symfony/Component/Yaml/Escaper.php
+++ b/src/Symfony/Component/Yaml/Escaper.php
@@ -28,20 +28,20 @@ class Escaper
     // first to ensure proper escaping because str_replace operates iteratively
     // on the input arrays. This ordering of the characters avoids the use of strtr,
     // which performs more slowly.
-    private static $escapees = array('\\', '\\\\', '\\"', '"',
+    private static $escapees = ['\\', '\\\\', '\\"', '"',
                                      "\x00",  "\x01",  "\x02",  "\x03",  "\x04",  "\x05",  "\x06",  "\x07",
                                      "\x08",  "\x09",  "\x0a",  "\x0b",  "\x0c",  "\x0d",  "\x0e",  "\x0f",
                                      "\x10",  "\x11",  "\x12",  "\x13",  "\x14",  "\x15",  "\x16",  "\x17",
                                      "\x18",  "\x19",  "\x1a",  "\x1b",  "\x1c",  "\x1d",  "\x1e",  "\x1f",
                                      "\xc2\x85", "\xc2\xa0", "\xe2\x80\xa8", "\xe2\x80\xa9",
-                               );
-    private static $escaped = array('\\\\', '\\"', '\\\\', '\\"',
+                               ];
+    private static $escaped = ['\\\\', '\\"', '\\\\', '\\"',
                                      '\\0',   '\\x01', '\\x02', '\\x03', '\\x04', '\\x05', '\\x06', '\\a',
                                      '\\b',   '\\t',   '\\n',   '\\v',   '\\f',   '\\r',   '\\x0e', '\\x0f',
                                      '\\x10', '\\x11', '\\x12', '\\x13', '\\x14', '\\x15', '\\x16', '\\x17',
                                      '\\x18', '\\x19', '\\x1a', '\\e',   '\\x1c', '\\x1d', '\\x1e', '\\x1f',
                                      '\\N', '\\_', '\\L', '\\P',
-                              );
+                              ];
 
     /**
      * Determines if a PHP value would require double quoting in YAML.
@@ -78,7 +78,7 @@ class Escaper
     {
         // Determines if a PHP value is entirely composed of a value that would
         // require single quoting in YAML.
-        if (\in_array(strtolower($value), array('null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'))) {
+        if (\in_array(strtolower($value), ['null', '~', 'true', 'false', 'y', 'n', 'yes', 'no', 'on', 'off'])) {
             return true;
         }
 
diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index bd3e56fde6..1619b3183a 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -63,7 +63,7 @@ class Inline
      *
      * @throws ParseException
      */
-    public static function parse(string $value = null, int $flags = 0, array $references = array())
+    public static function parse(string $value = null, int $flags = 0, array $references = [])
     {
         self::initialize($flags);
 
@@ -142,7 +142,7 @@ class Inline
                 }
 
                 if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
-                    $output = array();
+                    $output = [];
 
                     foreach ($value as $key => $val) {
                         $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
@@ -239,7 +239,7 @@ class Inline
     {
         // array
         if (($value || Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE & $flags) && !self::isHash($value)) {
-            $output = array();
+            $output = [];
             foreach ($value as $val) {
                 $output[] = self::dump($val, $flags);
             }
@@ -248,7 +248,7 @@ class Inline
         }
 
         // hash
-        $output = array();
+        $output = [];
         foreach ($value as $key => $val) {
             $output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
         }
@@ -263,9 +263,9 @@ class Inline
      *
      * @throws ParseException When malformed inline YAML string is parsed
      */
-    public static function parseScalar(string $scalar, int $flags = 0, array $delimiters = null, int &$i = 0, bool $evaluate = true, array $references = array())
+    public static function parseScalar(string $scalar, int $flags = 0, array $delimiters = null, int &$i = 0, bool $evaluate = true, array $references = [])
     {
-        if (\in_array($scalar[$i], array('"', "'"))) {
+        if (\in_array($scalar[$i], ['"', "'"])) {
             // quoted scalar
             $output = self::parseQuotedScalar($scalar, $i);
 
@@ -339,9 +339,9 @@ class Inline
      *
      * @throws ParseException When malformed inline YAML string is parsed
      */
-    private static function parseSequence(string $sequence, int $flags, int &$i = 0, array $references = array()): array
+    private static function parseSequence(string $sequence, int $flags, int &$i = 0, array $references = []): array
     {
-        $output = array();
+        $output = [];
         $len = \strlen($sequence);
         ++$i;
 
@@ -367,8 +367,8 @@ class Inline
                     $value = self::parseMapping($sequence, $flags, $i, $references);
                     break;
                 default:
-                    $isQuoted = \in_array($sequence[$i], array('"', "'"));
-                    $value = self::parseScalar($sequence, $flags, array(',', ']'), $i, null === $tag, $references);
+                    $isQuoted = \in_array($sequence[$i], ['"', "'"]);
+                    $value = self::parseScalar($sequence, $flags, [',', ']'], $i, null === $tag, $references);
 
                     // the value can be an array if a reference has been resolved to an array var
                     if (\is_string($value) && !$isQuoted && false !== strpos($value, ': ')) {
@@ -403,9 +403,9 @@ class Inline
      *
      * @throws ParseException When malformed inline YAML string is parsed
      */
-    private static function parseMapping(string $mapping, int $flags, int &$i = 0, array $references = array())
+    private static function parseMapping(string $mapping, int $flags, int &$i = 0, array $references = [])
     {
-        $output = array();
+        $output = [];
         $len = \strlen($mapping);
         ++$i;
         $allowOverwrite = false;
@@ -427,8 +427,8 @@ class Inline
 
             // key
             $offsetBeforeKeyParsing = $i;
-            $isKeyQuoted = \in_array($mapping[$i], array('"', "'"), true);
-            $key = self::parseScalar($mapping, $flags, array(':', ' '), $i, false, array());
+            $isKeyQuoted = \in_array($mapping[$i], ['"', "'"], true);
+            $key = self::parseScalar($mapping, $flags, [':', ' '], $i, false, []);
 
             if ($offsetBeforeKeyParsing === $i) {
                 throw new ParseException('Missing mapping key.', self::$parsedLineNumber + 1, $mapping);
@@ -446,7 +446,7 @@ class Inline
                 }
             }
 
-            if (!$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], array(' ', ',', '[', ']', '{', '}'), true))) {
+            if (!$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], [' ', ',', '[', ']', '{', '}'], true))) {
                 throw new ParseException('Colons must be followed by a space or an indication character (i.e. " ", ",", "[", "]", "{", "}").', self::$parsedLineNumber + 1, $mapping);
             }
 
@@ -504,7 +504,7 @@ class Inline
                         }
                         break;
                     default:
-                        $value = self::parseScalar($mapping, $flags, array(',', '}'), $i, null === $tag, $references);
+                        $value = self::parseScalar($mapping, $flags, [',', '}'], $i, null === $tag, $references);
                         // Spec: Keys MUST be unique; first one wins.
                         // Parser cannot abort this mapping earlier, since lines
                         // are processed sequentially.
@@ -538,7 +538,7 @@ class Inline
      *
      * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
      */
-    private static function evaluateScalar(string $scalar, int $flags, array $references = array())
+    private static function evaluateScalar(string $scalar, int $flags, array $references = [])
     {
         $scalar = trim($scalar);
         $scalarLower = strtolower($scalar);
@@ -670,7 +670,7 @@ class Inline
         $nextOffset += strspn($value, ' ', $nextOffset);
 
         // Is followed by a scalar and is a built-in tag
-        if ($tag && (!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], array('[', '{'), true)) && ('!' === $tag[0] || 'str' === $tag || 'php/const' === $tag || 'php/object' === $tag)) {
+        if ($tag && (!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], ['[', '{'], true)) && ('!' === $tag[0] || 'str' === $tag || 'php/const' === $tag || 'php/object' === $tag)) {
             // Manage in {@link self::evaluateScalar()}
             return null;
         }
diff --git a/src/Symfony/Component/Yaml/Parser.php b/src/Symfony/Component/Yaml/Parser.php
index 498e64a754..d63467084b 100644
--- a/src/Symfony/Component/Yaml/Parser.php
+++ b/src/Symfony/Component/Yaml/Parser.php
@@ -29,13 +29,13 @@ class Parser
     private $filename;
     private $offset = 0;
     private $totalNumberOfLines;
-    private $lines = array();
+    private $lines = [];
     private $currentLineNb = -1;
     private $currentLine = '';
-    private $refs = array();
-    private $skippedLineNumbers = array();
-    private $locallySkippedLineNumbers = array();
-    private $refsBeingParsed = array();
+    private $refs = [];
+    private $skippedLineNumbers = [];
+    private $locallySkippedLineNumbers = [];
+    private $refsBeingParsed = [];
 
     /**
      * Parses a YAML file into a PHP value.
@@ -82,7 +82,7 @@ class Parser
             throw new ParseException('The YAML value does not appear to be valid UTF-8.', -1, null, $this->filename);
         }
 
-        $this->refs = array();
+        $this->refs = [];
 
         $mbEncoding = null;
         $data = null;
@@ -98,11 +98,11 @@ class Parser
             if (null !== $mbEncoding) {
                 mb_internal_encoding($mbEncoding);
             }
-            $this->lines = array();
+            $this->lines = [];
             $this->currentLine = '';
-            $this->refs = array();
-            $this->skippedLineNumbers = array();
-            $this->locallySkippedLineNumbers = array();
+            $this->refs = [];
+            $this->skippedLineNumbers = [];
+            $this->locallySkippedLineNumbers = [];
         }
 
         return $data;
@@ -124,7 +124,7 @@ class Parser
         $this->currentLine = '';
         $value = $this->cleanup($value);
         $this->lines = explode("\n", $value);
-        $this->locallySkippedLineNumbers = array();
+        $this->locallySkippedLineNumbers = [];
 
         if (null === $this->totalNumberOfLines) {
             $this->totalNumberOfLines = \count($this->lines);
@@ -134,7 +134,7 @@ class Parser
             return null;
         }
 
-        $data = array();
+        $data = [];
         $context = null;
         $allowOverwrite = false;
 
@@ -207,7 +207,7 @@ class Parser
                 }
             } elseif (
                 self::preg_match('#^(?P<key>(?:![^\s]++\s++)?(?:'.Inline::REGEX_QUOTED_STRING.'|(?:!?!php/const:)?[^ \'"\[\{!].*?)) *\:(\s++(?P<value>.+))?$#u', rtrim($this->currentLine), $values)
-                && (false === strpos($values['key'], ' #') || \in_array($values['key'][0], array('"', "'")))
+                && (false === strpos($values['key'], ' #') || \in_array($values['key'][0], ['"', "'"]))
             ) {
                 if ($context && 'sequence' == $context) {
                     throw new ParseException('You cannot define a mapping item when in a sequence', $this->currentLineNb + 1, $this->currentLine, $this->filename);
@@ -546,7 +546,7 @@ class Parser
             $newIndent = $indentation;
         }
 
-        $data = array();
+        $data = [];
         if ($this->getCurrentLineIndentation() >= $newIndent) {
             $data[] = substr($this->currentLine, $newIndent);
         } elseif ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()) {
@@ -659,7 +659,7 @@ class Parser
             return $this->refs[$value];
         }
 
-        if (\in_array($value[0], array('!', '|', '>'), true) && self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
+        if (\in_array($value[0], ['!', '|', '>'], true) && self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
             $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
 
             $data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs($modifiers));
@@ -683,7 +683,7 @@ class Parser
                 return Inline::parse($value, $flags, $this->refs);
             }
 
-            $lines = array();
+            $lines = [];
 
             while ($this->moveToNextLine()) {
                 // unquoted strings end before the first unindented line
@@ -748,7 +748,7 @@ class Parser
         }
 
         $isCurrentLineBlank = $this->isCurrentLineBlank();
-        $blockLines = array();
+        $blockLines = [];
 
         // leading blank lines are consumed before determining indentation
         while ($notEOF && $isCurrentLineBlank) {
@@ -922,7 +922,7 @@ class Parser
      */
     private function cleanup(string $value): string
     {
-        $value = str_replace(array("\r\n", "\r"), "\n", $value);
+        $value = str_replace(["\r\n", "\r"], "\n", $value);
 
         // strip YAML header
         $count = 0;
diff --git a/src/Symfony/Component/Yaml/Tests/Command/LintCommandTest.php b/src/Symfony/Component/Yaml/Tests/Command/LintCommandTest.php
index efe7970413..b0e1e26af5 100644
--- a/src/Symfony/Component/Yaml/Tests/Command/LintCommandTest.php
+++ b/src/Symfony/Component/Yaml/Tests/Command/LintCommandTest.php
@@ -31,7 +31,7 @@ class LintCommandTest extends TestCase
         $tester = $this->createCommandTester();
         $filename = $this->createFile('foo: bar');
 
-        $ret = $tester->execute(array('filename' => $filename), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $tester->execute(['filename' => $filename], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertRegExp('/^\/\/ OK in /', trim($tester->getDisplay()));
@@ -43,7 +43,7 @@ class LintCommandTest extends TestCase
         $filename1 = $this->createFile('foo: bar');
         $filename2 = $this->createFile('bar: baz');
 
-        $ret = $tester->execute(array('filename' => array($filename1, $filename2)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $tester->execute(['filename' => [$filename1, $filename2]], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
 
         $this->assertEquals(0, $ret, 'Returns 0 in case of success');
         $this->assertRegExp('/^\/\/ OK in /', trim($tester->getDisplay()));
@@ -57,7 +57,7 @@ bar';
         $tester = $this->createCommandTester();
         $filename = $this->createFile($incorrectContent);
 
-        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $ret = $tester->execute(['filename' => $filename], ['decorated' => false]);
 
         $this->assertEquals(1, $ret, 'Returns 1 in case of error');
         $this->assertContains('Unable to parse at line 3 (near "bar").', trim($tester->getDisplay()));
@@ -68,7 +68,7 @@ bar';
         $yaml = <<<YAML
 !php/const 'Symfony\Component\Yaml\Tests\Command\Foo::TEST': bar
 YAML;
-        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $this->createCommandTester()->execute(['filename' => $this->createFile($yaml)], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
         $this->assertSame(0, $ret, 'lint:yaml exits with code 0 in case of success');
     }
 
@@ -77,7 +77,7 @@ YAML;
         $yaml = <<<YAML
 foo: !my_tag {foo: bar}
 YAML;
-        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml), '--parse-tags' => true), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $this->createCommandTester()->execute(['filename' => $this->createFile($yaml), '--parse-tags' => true], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
         $this->assertSame(0, $ret, 'lint:yaml exits with code 0 in case of success');
     }
 
@@ -86,7 +86,7 @@ YAML;
         $yaml = <<<YAML
 foo: !my_tag {foo: bar}
 YAML;
-        $ret = $this->createCommandTester()->execute(array('filename' => $this->createFile($yaml)), array('verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false));
+        $ret = $this->createCommandTester()->execute(['filename' => $this->createFile($yaml)], ['verbosity' => OutputInterface::VERBOSITY_VERBOSE, 'decorated' => false]);
         $this->assertSame(1, $ret, 'lint:yaml exits with code 1 in case of error');
     }
 
@@ -99,7 +99,7 @@ YAML;
         $filename = $this->createFile('');
         unlink($filename);
 
-        $ret = $tester->execute(array('filename' => $filename), array('decorated' => false));
+        $ret = $tester->execute(['filename' => $filename], ['decorated' => false]);
     }
 
     /**
@@ -129,7 +129,7 @@ YAML;
 
     protected function setUp()
     {
-        $this->files = array();
+        $this->files = [];
         @mkdir(sys_get_temp_dir().'/framework-yml-lint-test');
     }
 
diff --git a/src/Symfony/Component/Yaml/Tests/DumperTest.php b/src/Symfony/Component/Yaml/Tests/DumperTest.php
index 85dfd5b956..d8d544aa28 100644
--- a/src/Symfony/Component/Yaml/Tests/DumperTest.php
+++ b/src/Symfony/Component/Yaml/Tests/DumperTest.php
@@ -22,20 +22,20 @@ class DumperTest extends TestCase
     protected $dumper;
     protected $path;
 
-    protected $array = array(
+    protected $array = [
         '' => 'bar',
         'foo' => '#bar',
-        'foo\'bar' => array(),
-        'bar' => array(1, 'foo'),
-        'foobar' => array(
+        'foo\'bar' => [],
+        'bar' => [1, 'foo'],
+        'foobar' => [
             'foo' => 'bar',
-            'bar' => array(1, 'foo'),
-            'foobar' => array(
+            'bar' => [1, 'foo'],
+            'foobar' => [
                 'foo' => 'bar',
-                'bar' => array(1, 'foo'),
-            ),
-        ),
-    );
+                'bar' => [1, 'foo'],
+            ],
+        ],
+    ];
 
     protected function setUp()
     {
@@ -179,14 +179,14 @@ EOF;
 
     public function testObjectSupportEnabled()
     {
-        $dump = $this->dumper->dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_OBJECT);
+        $dump = $this->dumper->dump(['foo' => new A(), 'bar' => 1], 0, 0, Yaml::DUMP_OBJECT);
 
         $this->assertEquals('{ foo: !php/object \'O:30:"Symfony\Component\Yaml\Tests\A":1:{s:1:"a";s:3:"foo";}\', bar: 1 }', $dump, '->dump() is able to dump objects');
     }
 
     public function testObjectSupportDisabledButNoExceptions()
     {
-        $dump = $this->dumper->dump(array('foo' => new A(), 'bar' => 1));
+        $dump = $this->dumper->dump(['foo' => new A(), 'bar' => 1]);
 
         $this->assertEquals('{ foo: null, bar: 1 }', $dump, '->dump() does not dump objects when disabled');
     }
@@ -196,7 +196,7 @@ EOF;
      */
     public function testObjectSupportDisabledWithExceptions()
     {
-        $this->dumper->dump(array('foo' => new A(), 'bar' => 1), 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
+        $this->dumper->dump(['foo' => new A(), 'bar' => 1], 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
     }
 
     /**
@@ -209,27 +209,27 @@ EOF;
 
     public function getEscapeSequences()
     {
-        return array(
-            'empty string' => array('', "''"),
-            'null' => array("\x0", '"\\0"'),
-            'bell' => array("\x7", '"\\a"'),
-            'backspace' => array("\x8", '"\\b"'),
-            'horizontal-tab' => array("\t", '"\\t"'),
-            'line-feed' => array("\n", '"\\n"'),
-            'vertical-tab' => array("\v", '"\\v"'),
-            'form-feed' => array("\xC", '"\\f"'),
-            'carriage-return' => array("\r", '"\\r"'),
-            'escape' => array("\x1B", '"\\e"'),
-            'space' => array(' ', "' '"),
-            'double-quote' => array('"', "'\"'"),
-            'slash' => array('/', '/'),
-            'backslash' => array('\\', '\\'),
-            'next-line' => array("\xC2\x85", '"\\N"'),
-            'non-breaking-space' => array("\xc2\xa0", '"\\_"'),
-            'line-separator' => array("\xE2\x80\xA8", '"\\L"'),
-            'paragraph-separator' => array("\xE2\x80\xA9", '"\\P"'),
-            'colon' => array(':', "':'"),
-        );
+        return [
+            'empty string' => ['', "''"],
+            'null' => ["\x0", '"\\0"'],
+            'bell' => ["\x7", '"\\a"'],
+            'backspace' => ["\x8", '"\\b"'],
+            'horizontal-tab' => ["\t", '"\\t"'],
+            'line-feed' => ["\n", '"\\n"'],
+            'vertical-tab' => ["\v", '"\\v"'],
+            'form-feed' => ["\xC", '"\\f"'],
+            'carriage-return' => ["\r", '"\\r"'],
+            'escape' => ["\x1B", '"\\e"'],
+            'space' => [' ', "' '"],
+            'double-quote' => ['"', "'\"'"],
+            'slash' => ['/', '/'],
+            'backslash' => ['\\', '\\'],
+            'next-line' => ["\xC2\x85", '"\\N"'],
+            'non-breaking-space' => ["\xc2\xa0", '"\\_"'],
+            'line-separator' => ["\xE2\x80\xA8", '"\\L"'],
+            'paragraph-separator' => ["\xE2\x80\xA9", '"\\P"'],
+            'colon' => [':', "':'"],
+        ];
     }
 
     public function testBinaryDataIsDumpedBase64Encoded()
@@ -237,7 +237,7 @@ EOF;
         $binaryData = file_get_contents(__DIR__.'/Fixtures/arrow.gif');
         $expected = '{ data: !!binary '.base64_encode($binaryData).' }';
 
-        $this->assertSame($expected, $this->dumper->dump(array('data' => $binaryData)));
+        $this->assertSame($expected, $this->dumper->dump(['data' => $binaryData]));
     }
 
     public function testNonUtf8DataIsDumpedBase64Encoded()
@@ -258,18 +258,18 @@ EOF;
 
     public function objectAsMapProvider()
     {
-        $tests = array();
+        $tests = [];
 
         $bar = new \stdClass();
         $bar->class = 'classBar';
-        $bar->args = array('bar');
+        $bar->args = ['bar'];
         $zar = new \stdClass();
         $foo = new \stdClass();
         $foo->bar = $bar;
         $foo->zar = $zar;
         $object = new \stdClass();
         $object->foo = $foo;
-        $tests['stdClass'] = array($object, $object);
+        $tests['stdClass'] = [$object, $object];
 
         $arrayObject = new \ArrayObject();
         $arrayObject['foo'] = 'bar';
@@ -277,19 +277,19 @@ EOF;
         $parsedArrayObject = new \stdClass();
         $parsedArrayObject->foo = 'bar';
         $parsedArrayObject->baz = 'foobar';
-        $tests['ArrayObject'] = array($arrayObject, $parsedArrayObject);
+        $tests['ArrayObject'] = [$arrayObject, $parsedArrayObject];
 
         $a = new A();
-        $tests['arbitrary-object'] = array($a, null);
+        $tests['arbitrary-object'] = [$a, null];
 
         return $tests;
     }
 
     public function testDumpingArrayObjectInstancesRespectsInlineLevel()
     {
-        $deep = new \ArrayObject(array('deep1' => 'd', 'deep2' => 'e'));
-        $inner = new \ArrayObject(array('inner1' => 'b', 'inner2' => 'c', 'inner3' => $deep));
-        $outer = new \ArrayObject(array('outer1' => 'a', 'outer2' => $inner));
+        $deep = new \ArrayObject(['deep1' => 'd', 'deep2' => 'e']);
+        $inner = new \ArrayObject(['inner1' => 'b', 'inner2' => 'c', 'inner3' => $deep]);
+        $outer = new \ArrayObject(['outer1' => 'a', 'outer2' => $inner]);
 
         $yaml = $this->dumper->dump($outer, 2, 0, Yaml::DUMP_OBJECT_AS_MAP);
 
@@ -306,9 +306,9 @@ YAML;
 
     public function testDumpingArrayObjectInstancesWithNumericKeysInlined()
     {
-        $deep = new \ArrayObject(array('d', 'e'));
-        $inner = new \ArrayObject(array('b', 'c', $deep));
-        $outer = new \ArrayObject(array('a', $inner));
+        $deep = new \ArrayObject(['d', 'e']);
+        $inner = new \ArrayObject(['b', 'c', $deep]);
+        $outer = new \ArrayObject(['a', $inner]);
 
         $yaml = $this->dumper->dump($outer, 0, 0, Yaml::DUMP_OBJECT_AS_MAP);
         $expected = <<<YAML
@@ -319,9 +319,9 @@ YAML;
 
     public function testDumpingArrayObjectInstancesWithNumericKeysRespectsInlineLevel()
     {
-        $deep = new \ArrayObject(array('d', 'e'));
-        $inner = new \ArrayObject(array('b', 'c', $deep));
-        $outer = new \ArrayObject(array('a', $inner));
+        $deep = new \ArrayObject(['d', 'e']);
+        $inner = new \ArrayObject(['b', 'c', $deep]);
+        $outer = new \ArrayObject(['a', $inner]);
         $yaml = $this->dumper->dump($outer, 2, 0, Yaml::DUMP_OBJECT_AS_MAP);
         $expected = <<<YAML
 0: a
@@ -374,34 +374,34 @@ YAML;
 
     public function testDumpMultiLineStringAsScalarBlock()
     {
-        $data = array(
-            'data' => array(
+        $data = [
+            'data' => [
                 'single_line' => 'foo bar baz',
                 'multi_line' => "foo\nline with trailing spaces:\n  \nbar\ninteger like line:\n123456789\nempty line:\n\nbaz",
                 'multi_line_with_carriage_return' => "foo\nbar\r\nbaz",
-                'nested_inlined_multi_line_string' => array(
+                'nested_inlined_multi_line_string' => [
                     'inlined_multi_line' => "foo\nbar\r\nempty line:\n\nbaz",
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
         $this->assertSame(file_get_contents(__DIR__.'/Fixtures/multiple_lines_as_literal_block.yml'), $this->dumper->dump($data, 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
     }
 
     public function testDumpMultiLineStringAsScalarBlockWhenFirstLineHasLeadingSpace()
     {
-        $data = array(
-            'data' => array(
+        $data = [
+            'data' => [
                 'multi_line' => "    the first line has leading spaces\nThe second line does not.",
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame(file_get_contents(__DIR__.'/Fixtures/multiple_lines_as_literal_block_leading_space_in_first_line.yml'), $this->dumper->dump($data, 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
     }
 
     public function testCarriageReturnIsMaintainedWhenDumpingAsMultiLineLiteralBlock()
     {
-        $this->assertSame("- \"a\\r\\nb\\nc\"\n", $this->dumper->dump(array("a\r\nb\nc"), 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
+        $this->assertSame("- \"a\\r\\nb\\nc\"\n", $this->dumper->dump(["a\r\nb\nc"], 2, 0, Yaml::DUMP_MULTI_LINE_LITERAL_BLOCK));
     }
 
     /**
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsAnchorAlias.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsAnchorAlias.yml
index 5f9c94275b..81b4129aa3 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsAnchorAlias.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsAnchorAlias.yml
@@ -14,7 +14,7 @@ yaml: |
     - Oren
     - *showell
 php: |
-    array('Steve', 'Clark', 'Brian', 'Oren', 'Steve')
+    ['Steve', 'Clark', 'Brian', 'Oren', 'Steve']
 
 ---
 test: Alias of a Mapping
@@ -28,4 +28,4 @@ yaml: |
     - banana
     - *hello
 php: |
-    array(array('Meat'=>'pork', 'Starch'=>'potato'), 'banana', array('Meat'=>'pork', 'Starch'=>'potato'))
+    [['Meat'=>'pork', 'Starch'=>'potato'], 'banana', ['Meat'=>'pork', 'Starch'=>'potato']]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBasicTests.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBasicTests.yml
index dfd93021d1..1a08d8ea9f 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBasicTests.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBasicTests.yml
@@ -9,7 +9,7 @@ yaml: |
     - banana
     - carrot
 php: |
-    array('apple', 'banana', 'carrot')
+    ['apple', 'banana', 'carrot']
 ---
 test: Sequence With Item Being Null In The Middle
 brief: |
@@ -21,7 +21,7 @@ yaml: |
     -
     - carrot
 php: |
-    array('apple', null, 'carrot')
+    ['apple', null, 'carrot']
 ---
 test: Sequence With Last Item Being Null
 brief: |
@@ -33,7 +33,7 @@ yaml: |
     - banana
     -
 php: |
-    array('apple', 'banana', null)
+    ['apple', 'banana', null]
 ---
 test: Nested Sequences
 brief: |
@@ -46,7 +46,7 @@ yaml: |
      - bar
      - baz
 php: |
-    array(array('foo', 'bar', 'baz'))
+    [['foo', 'bar', 'baz']]
 ---
 test: Mixed Sequences
 brief: |
@@ -61,7 +61,7 @@ yaml: |
     - banana
     - carrot
 php: |
-    array('apple', array('foo', 'bar', 'x123'), 'banana', 'carrot')
+    ['apple', ['foo', 'bar', 'x123'], 'banana', 'carrot']
 ---
 test: Deeply Nested Sequences
 brief: |
@@ -74,7 +74,7 @@ yaml: |
       - uno
       - dos
 php: |
-    array(array(array('uno', 'dos')))
+    [[['uno', 'dos']]]
 ---
 test: Simple Mapping
 brief: |
@@ -87,7 +87,7 @@ yaml: |
     foo: whatever
     bar: stuff
 php: |
-    array('foo' => 'whatever', 'bar' => 'stuff')
+    ['foo' => 'whatever', 'bar' => 'stuff']
 ---
 test: Sequence in a Mapping
 brief: |
@@ -98,7 +98,7 @@ yaml: |
      - uno
      - dos
 php: |
-    array('foo' => 'whatever', 'bar' => array('uno', 'dos'))
+    ['foo' => 'whatever', 'bar' => ['uno', 'dos']]
 ---
 test: Nested Mappings
 brief: |
@@ -110,14 +110,14 @@ yaml: |
      name: steve
      sport: baseball
 php: |
-    array(
+    [
       'foo' => 'whatever',
-      'bar' => array(
+      'bar' => [
          'fruit' => 'apple',
          'name' => 'steve',
          'sport' => 'baseball'
-       )
-    )
+      ]
+    ]
 ---
 test: Mixed Mapping
 brief: |
@@ -136,22 +136,22 @@ yaml: |
        perl: papers
        ruby: scissorses
 php: |
-    array(
+    [
       'foo' => 'whatever',
-      'bar' => array(
-        array(
+      'bar' => [
+        [
             'fruit' => 'apple',
             'name' => 'steve',
             'sport' => 'baseball'
-        ),
+        ],
         'more',
-        array(
+        [
             'python' => 'rocks',
             'perl' => 'papers',
             'ruby' => 'scissorses'
-        )
-      )
-    )
+        ]
+      ]
+    ]
 ---
 test: Mapping-in-Sequence Shortcut
 todo: true
@@ -163,7 +163,7 @@ yaml: |
      - work on YAML.py:
         - work on Store
 php: |
-    array(array('work on YAML.py' => array('work on Store')))
+    [['work on YAML.py' => ['work on Store']]]
 ---
 test: Sequence-in-Mapping Shortcut
 todo: true
@@ -177,7 +177,7 @@ yaml: |
      - '%.sourceforge.net'
      - '%.freepan.org'
 php: |
-     array('allow' => array('localhost', '%.sourceforge.net', '%.freepan.org'))
+     ['allow' => ['localhost', '%.sourceforge.net', '%.freepan.org']]
 ---
 todo: true
 test: Merge key
@@ -192,11 +192,11 @@ yaml: |
        <<:
          age: 38
 php: |
-     array(
+     [
        'mapping' =>
-       array(
+       [
          'name' => 'Joe',
          'job' => 'Accountant',
          'age' => 38
-       )
-     )
+       ]
+     ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBlockMapping.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBlockMapping.yml
index f7ca469b40..1f3a2e544f 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBlockMapping.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsBlockMapping.yml
@@ -5,7 +5,7 @@ brief: |
 yaml: |
     foo: bar
 php: |
-    array('foo' => 'bar')
+    ['foo' => 'bar']
 ---
 test: Multi Element Mapping
 brief: |
@@ -15,11 +15,11 @@ yaml: |
     white: walls
     blue: berries
 php: |
-    array(
+    [
      'red' => 'baron',
      'white' => 'walls',
      'blue' => 'berries',
-    )
+    ]
 ---
 test: Values aligned
 brief: |
@@ -30,11 +30,11 @@ yaml: |
     white: walls
     blue:  berries
 php: |
-    array(
+    [
      'red' => 'baron',
      'white' => 'walls',
      'blue' => 'berries',
-    )
+    ]
 ---
 test: Colons aligned
 brief: |
@@ -44,8 +44,8 @@ yaml: |
     white : walls
     blue  : berries
 php: |
-    array(
+    [
      'red' => 'baron',
      'white' => 'walls',
      'blue' => 'berries',
-    )
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsDocumentSeparator.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsDocumentSeparator.yml
index d98810256e..67cb47adb5 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsDocumentSeparator.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsDocumentSeparator.yml
@@ -49,7 +49,7 @@ yaml: |
     foo: 1
     bar: 2
 php: |
-    array('foo' => 1, 'bar' => 2)
+    ['foo' => 1, 'bar' => 2]
 documents: 1
 
 ---
@@ -63,7 +63,7 @@ yaml: |
     foo: |
         ---
 php: |
-    array('foo' => "---\n")
+    ['foo' => "---\n"]
 
 ---
 test: Multiple Document Separators in Block
@@ -79,7 +79,7 @@ yaml: |
     bar: |
         fooness
 php: |
-    array(
+    [
        'foo' => "---\nfoo: bar\n---\nyo: baz\n",
        'bar' => "fooness\n"
-    )
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsErrorTests.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsErrorTests.yml
index e8506fcb66..e8697f9315 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsErrorTests.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsErrorTests.yml
@@ -22,4 +22,4 @@ yaml: |
     firstline: 1
     secondline: 2
 php: |
-  array('foo' => null, 'firstline' => 1, 'secondline' => 2)
+  ['foo' => null, 'firstline' => 1, 'secondline' => 2]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFlowCollections.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFlowCollections.yml
index 03090e4abc..cc562cd9d1 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFlowCollections.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFlowCollections.yml
@@ -8,7 +8,7 @@ brief: >
 yaml: |
     seq: [ a, b, c ]
 php: |
-    array('seq' => array('a', 'b', 'c'))
+    ['seq' => ['a', 'b', 'c']]
 ---
 test: Simple Inline Hash
 brief: >
@@ -21,7 +21,7 @@ brief: >
 yaml: |
     hash: { name: Steve, foo: bar }
 php: |
-    array('hash' => array('name' => 'Steve', 'foo' => 'bar'))
+    ['hash' => ['name' => 'Steve', 'foo' => 'bar']]
 ---
 test: Multi-line Inline Collections
 todo: true
@@ -38,15 +38,15 @@ yaml: |
                 Python: python.org,
                 Perl: use.perl.org }
 php: |
-    array(
-      'languages' => array('Ruby', 'Perl', 'Python'),
-      'websites' => array(
+    [
+      'languages' => ['Ruby', 'Perl', 'Python'],
+      'websites' => [
         'YAML' => 'yaml.org',
         'Ruby' => 'ruby-lang.org',
         'Python' => 'python.org',
         'Perl' => 'use.perl.org'
-      )
-    )
+      ]
+    ]
 ---
 test: Commas in Values (not in the spec!)
 todo: true
@@ -57,4 +57,4 @@ brief: >
 yaml: |
     attendances: [ 45,123, 70,000, 17,222 ]
 php: |
-    array('attendances' => array(45123, 70000, 17222))
+    ['attendances' => [45123, 70000, 17222]]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFoldedScalars.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFoldedScalars.yml
index a14735a55a..2895202a2a 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFoldedScalars.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsFoldedScalars.yml
@@ -12,7 +12,7 @@ yaml: |
         Foo
         Bar
 php: |
-    array('this' => "Foo\nBar\n")
+    ['this' => "Foo\nBar\n"]
 ---
 test: The '+' indicator
 brief: >
@@ -28,11 +28,11 @@ yaml: |
 
     dummy: value
 php: |
-    array(
+    [
         'normal' => "extra new lines not kept\n",
         'preserving' => "extra new lines are kept\n\n\n",
         'dummy' => 'value'
-    )
+    ]
 ---
 test: Three trailing newlines in literals
 brief: >
@@ -64,14 +64,14 @@ yaml: |
 
     same as "kept" above: "This has four newlines.\n\n\n\n"
 php: |
-    array(
+    [
       'clipped' => "This has one newline.\n",
       'same as "clipped" above' => "This has one newline.\n",
       'stripped' => 'This has no newline.',
       'same as "stripped" above' => 'This has no newline.',
       'kept' => "This has four newlines.\n\n\n\n",
       'same as "kept" above' => "This has four newlines.\n\n\n\n"
-    )
+    ]
 ---
 test: Extra trailing newlines with spaces
 todo: true
@@ -95,8 +95,8 @@ yaml: |
 
 
 php: |
-    array('this' => "Foo\n\n  \n",
-      'kept' => "Foo\n\n  \n" )
+    ['this' => "Foo\n\n  \n",
+      'kept' => "Foo\n\n  \n"]
 
 ---
 test: Folded Block in a Sequence
@@ -115,12 +115,12 @@ yaml: |
         hmm
     - dog
 php: |
-    array(
+    [
         'apple',
         'banana',
         "can't you see the beauty of yaml? hmm\n",
         'dog'
-    )
+    ]
 ---
 test: Folded Block as a Mapping Value
 brief: >
@@ -135,10 +135,10 @@ yaml: |
         by a knee injury.
     source: espn
 php: |
-    array(
+    [
         'quote' => "Mark McGwire's year was crippled by a knee injury.\n",
         'source' => 'espn'
-    )
+    ]
 ---
 test: Three trailing newlines in folded blocks
 brief: >
@@ -166,11 +166,11 @@ yaml: |
 
     same as "kept" above: "This has four newlines.\n\n\n\n"
 php: |
-    array(
+    [
       'clipped' => "This has one newline.\n",
       'same as "clipped" above' => "This has one newline.\n",
       'stripped' => 'This has no newline.',
       'same as "stripped" above' => 'This has no newline.',
       'kept' => "This has four newlines.\n\n\n\n",
       'same as "kept" above' => "This has four newlines.\n\n\n\n"
-    )
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsNullsAndEmpties.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsNullsAndEmpties.yml
index 9a5300f2ef..ea8e36ed08 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsNullsAndEmpties.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsNullsAndEmpties.yml
@@ -6,7 +6,7 @@ brief: >
 yaml: |
     empty: []
 php: |
-    array('empty' => array())
+    ['empty' => []]
 ---
 test: Empty Mapping
 brief: >
@@ -15,19 +15,19 @@ brief: >
 yaml: |
     empty: {}
 php: |
-    array('empty' => array())
+    ['empty' => []]
 ---
 test: Empty Sequence as Entire Document
 yaml: |
     []
 php: |
-    array()
+    []
 ---
 test: Empty Mapping as Entire Document
 yaml: |
     {}
 php: |
-    array()
+    []
 ---
 test: Null as Document
 yaml: |
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsSpecificationExamples.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsSpecificationExamples.yml
index 3ee795adf5..87c3e2e300 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsSpecificationExamples.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsSpecificationExamples.yml
@@ -6,7 +6,7 @@ yaml: |
   - Sammy Sosa
   - Ken Griffey
 php: |
-  array('Mark McGwire', 'Sammy Sosa', 'Ken Griffey')
+  ['Mark McGwire', 'Sammy Sosa', 'Ken Griffey']
 ---
 test: Mapping of scalars to scalars
 spec: 2.2
@@ -15,7 +15,7 @@ yaml: |
   avg: 0.278
   rbi: 147
 php: |
-  array('hr' => 65, 'avg' => 0.278, 'rbi' => 147)
+  ['hr' => 65, 'avg' => 0.278, 'rbi' => 147]
 ---
 test: Mapping of scalars to sequences
 spec: 2.3
@@ -29,13 +29,13 @@ yaml: |
        - Chicago Cubs
        - Atlanta Braves
 php: |
-    array('american' =>
-        array( 'Boston Red Sox', 'Detroit Tigers',
-          'New York Yankees' ),
+    ['american' =>
+        [ 'Boston Red Sox', 'Detroit Tigers',
+          'New York Yankees' ],
       'national' =>
-        array( 'New York Mets', 'Chicago Cubs',
-          'Atlanta Braves' )
-    )
+        [ 'New York Mets', 'Chicago Cubs',
+          'Atlanta Braves' ]
+    ]
 ---
 test: Sequence of mappings
 spec: 2.4
@@ -49,10 +49,10 @@ yaml: |
       hr:   63
       avg:  0.288
 php: |
-    array(
-      array('name' => 'Mark McGwire', 'hr' => 65, 'avg' => 0.278),
-      array('name' => 'Sammy Sosa', 'hr' => 63, 'avg' => 0.288)
-    )
+    [
+      ['name' => 'Mark McGwire', 'hr' => 65, 'avg' => 0.278],
+      ['name' => 'Sammy Sosa', 'hr' => 63, 'avg' => 0.288]
+    ]
 ---
 test: Legacy A5
 todo: true
@@ -134,11 +134,11 @@ yaml: |
   - [ Mark McGwire , 65 , 0.278 ]
   - [ Sammy Sosa   , 63 , 0.288 ]
 php: |
-  array(
-    array( 'name', 'hr', 'avg' ),
-    array( 'Mark McGwire', 65, 0.278 ),
-    array( 'Sammy Sosa', 63, 0.288 )
-  )
+  [
+    [ 'name', 'hr', 'avg' ],
+    [ 'Mark McGwire', 65, 0.278 ],
+    [ 'Sammy Sosa', 63, 0.288 ]
+  ]
 ---
 test: Mapping of mappings
 todo: true
@@ -150,12 +150,12 @@ yaml: |
       avg: 0.288
     }
 php: |
-  array(
+  [
     'Mark McGwire' =>
-      array( 'hr' => 65, 'avg' => 0.278 ),
+      [ 'hr' => 65, 'avg' => 0.278 ],
     'Sammy Sosa' =>
-      array( 'hr' => 63, 'avg' => 0.288 )
-  )
+      [ 'hr' => 63, 'avg' => 0.288 ]
+  ]
 ---
 test: Two documents in a stream each with a leading comment
 todo: true
@@ -208,10 +208,10 @@ yaml: |
     - Sammy Sosa
     - Ken Griffey
 php: |
-  array(
-    'hr' => array( 'Mark McGwire', 'Sammy Sosa' ),
-    'rbi' => array( 'Sammy Sosa', 'Ken Griffey' )
-  )
+  [
+    'hr' => [ 'Mark McGwire', 'Sammy Sosa' ],
+    'rbi' => [ 'Sammy Sosa', 'Ken Griffey' ]
+  ]
 ---
 test: Node for Sammy Sosa appears twice in this document
 spec: 2.10
@@ -225,12 +225,12 @@ yaml: |
       - *SS # Subsequent occurrence
       - Ken Griffey
 php: |
-   array(
+   [
       'hr' =>
-         array('Mark McGwire', 'Sammy Sosa'),
+         ['Mark McGwire', 'Sammy Sosa'],
       'rbi' =>
-         array('Sammy Sosa', 'Ken Griffey')
-   )
+         ['Sammy Sosa', 'Ken Griffey']
+    ]
 ---
 test: Mapping between sequences
 todo: true
@@ -297,20 +297,20 @@ yaml: |
   - item    : Big Shoes
     quantity: 1
 php: |
-  array (
-    array (
+  [
+    [
       'item' => 'Super Hoop',
       'quantity' => 1,
-    ),
-    array (
+    ],
+    [
       'item' => 'Basketball',
       'quantity' => 4,
-    ),
-    array (
+    ],
+    [
       'item' => 'Big Shoes',
       'quantity' => 1,
-    )
-  )
+    ]
+  ]
 perl: |
   [
      { item => 'Super Hoop', quantity => 1 },
@@ -462,11 +462,11 @@ yaml: |
      65 Home Runs
      0.278 Batting Average
 php: |
-  array(
+  [
     'name' => 'Mark McGwire',
     'accomplishment' => "Mark set a major league home run record in 1998.\n",
     'stats' => "65 Home Runs\n0.278 Batting Average\n"
-  )
+  ]
 ---
 test: Quoted scalars
 todo: true
@@ -512,11 +512,11 @@ yaml: |
   octal: 014
   hexadecimal: 0xC
 php: |
-  array(
+  [
     'canonical' => 12345,
     'octal' => 014,
     'hexadecimal' => 0xC
-  )
+  ]
 ---
 # FIX: spec shows parens around -inf and NaN
 test: Floating point
@@ -528,13 +528,13 @@ yaml: |
   not a number: .NaN
   float as whole number: !!float 1
 php: |
-  array(
+  [
     'canonical' => 1230.15,
     'exponential' => 1230.15,
     'negative infinity' => log(0),
     'not a number' => -log(0),
     'float as whole number' => (float) 1
-  )
+  ]
 ---
 test: Timestamps
 todo: true
@@ -545,12 +545,12 @@ yaml: |
   spaced:  2001-12-14 21:59:43.10 -05:00
   date:   2002-12-14 # Time is noon UTC
 php: |
-  array(
+  [
     'canonical' => YAML::mktime( 2001, 12, 15, 2, 59, 43, 0.10 ),
     'iso8601' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
     'spaced' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
     'date' => Date.new( 2002, 12, 14 )
-  )
+  ]
 ---
 test: legacy Timestamps test
 todo: true
@@ -561,12 +561,12 @@ yaml: |
     spaced:  2001-12-14 21:59:43.00 -05:00
     date:   2002-12-14
 php: |
-   array(
+   [
      'canonical' => Time::utc( 2001, 12, 15, 2, 59, 43, 0 ),
      'iso8601' => YAML::mktime( 2001, 2, 28, 21, 59, 43, 0, "-05:00" ),
      'spaced' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0, "-05:00" ),
      'date' => Date.new( 2002, 12, 14 )
-   )
+   ]
 ---
 test: Various explicit families
 todo: true
@@ -734,20 +734,20 @@ yaml: |
     Backup contact is Nancy
     Billsmer @ 338-4338.
 php: |
-  array(
+  [
      'invoice' => 34843, 'date' => gmmktime(0, 0, 0, 1, 23, 2001),
      'bill-to' =>
-      array( 'given' => 'Chris', 'family' => 'Dumars', 'address' => array( 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ) )
+      [ 'given' => 'Chris', 'family' => 'Dumars', 'address' => [ 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ]]
      , 'ship-to' =>
-      array( 'given' => 'Chris', 'family' => 'Dumars', 'address' => array( 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ) )
+      [ 'given' => 'Chris', 'family' => 'Dumars', 'address' => [ 'lines' => "458 Walkman Dr.\nSuite #292\n", 'city' => 'Royal Oak', 'state' => 'MI', 'postal' => 48046 ]]
      , 'product' =>
-       array(
-        array( 'sku' => 'BL394D', 'quantity' => 4, 'description' => 'Basketball', 'price' => 450.00 ),
-        array( 'sku' => 'BL4438H', 'quantity' => 1, 'description' => 'Super Hoop', 'price' => 2392.00 )
-      ),
+       [
+        [ 'sku' => 'BL394D', 'quantity' => 4, 'description' => 'Basketball', 'price' => 450.00 ],
+        [ 'sku' => 'BL4438H', 'quantity' => 1, 'description' => 'Super Hoop', 'price' => 2392.00 ]
+      ],
      'tax' => 251.42, 'total' => 4443.52,
      'comments' => "Late afternoon is best. Backup contact is Nancy Billsmer @ 338-4338.\n"
-  )
+  ]
 ---
 test: Log file
 todo: true
@@ -806,9 +806,9 @@ yaml: |
    # These are three throwaway comment
    # lines (the first line is empty).
 php: |
-   array(
+   [
      'this' => "contains three lines of text.\nThe third one starts with a\n# character. This isn't a comment.\n"
-   )
+   ]
 ---
 test: Document with a single value
 todo: true
@@ -858,11 +858,11 @@ yaml: |
    date    : 2001-01-23
    total   : 4443.52
 php: |
-   array(
+   [
       'invoice' => 34843,
       'date' => gmmktime(0, 0, 0, 1, 23, 2001),
       'total' => 4443.52
-   )
+   ]
 ---
 test: Single-line documents
 todo: true
@@ -913,7 +913,7 @@ yaml: |
    no int: ! 12
    string: !!str 12
 php: |
-   array( 'integer' => 12, 'no int' => '12', 'string' => '12' )
+   [ 'integer' => 12, 'no int' => '12', 'string' => '12' ]
 ---
 test: Private types
 todo: true
@@ -945,7 +945,7 @@ yaml: |
   # The URI is 'tag:yaml.org,2002:str'
   - !!str a Unicode string
 php: |
-  array( 'a Unicode string' )
+  [ 'a Unicode string' ]
 ---
 test: Type family under perl.yaml.org
 todo: true
@@ -1018,9 +1018,9 @@ yaml: |
    repeated use of this value.
   alias : *A001
 php: |
-  array( 'anchor' => 'This scalar has an anchor.',
+  [ 'anchor' => 'This scalar has an anchor.',
     'override' => "The alias node below is a repeated use of this value.\n",
-    'alias' => "The alias node below is a repeated use of this value.\n" )
+    'alias' => "The alias node below is a repeated use of this value.\n" ]
 ---
 test: Flow and block formatting
 todo: true
@@ -1131,12 +1131,12 @@ yaml: |
    redundant: |2
      This value is indented 2 spaces.
 php: |
-   array(
+   [
       'leading spaces' => "    This value starts with four spaces.\n",
       'leading line break' => "\nThis value starts with a line break.\n",
       'leading comment indicator' => "# first line starts with a\n# character.\n",
       'redundant' => "This value is indented 2 spaces.\n"
-   )
+   ]
 ---
 test: Chomping and keep modifiers
 yaml: |
@@ -1155,14 +1155,14 @@ yaml: |
 
     same as "kept" above: "This has two newlines.\n\n"
 php: |
-    array(
+    [
       'clipped' => "This has one newline.\n",
       'same as "clipped" above' => "This has one newline.\n",
       'stripped' => 'This has no newline.',
       'same as "stripped" above' => 'This has no newline.',
       'kept' => "This has two newlines.\n\n",
       'same as "kept" above' => "This has two newlines.\n\n"
-    )
+    ]
 ---
 test: Literal combinations
 todo: true
@@ -1200,7 +1200,7 @@ yaml: |
 
    both are equal to: "  This has no newline."
 php: |
-   array(
+   [
      'empty' => '',
      'literal' => "The \\ ' \" characters may be\nfreely used. Leading white\n   space " +
        "is significant.\n\nLine breaks are significant.\nThus this value contains one\n" +
@@ -1211,7 +1211,7 @@ php: |
      'indented and chomped' => '  This has no newline.',
      'also written as' => '  This has no newline.',
      'both are equal to' => '  This has no newline.'
-   )
+   ]
 ---
 test: Folded combinations
 todo: true
@@ -1267,7 +1267,7 @@ yaml: |
    # Explicit comments may follow
    # but must be less indented.
 php: |
-   array(
+   [
      'empty' => '',
      'one paragraph' => 'Line feeds are converted to spaces, so this value'.
        " contains no line breaks except for the final one.\n",
@@ -1279,7 +1279,7 @@ php: |
      'above is equal to' => "This is a folded paragraph followed by a list:\n".
        " * first entry\n * second entry\nFollowed by another folded paragraph, ".
        "another list:\n\n * first entry\n\n * second entry\n\nAnd a final folded paragraph.\n"
-   )
+   ]
 ---
 test: Single quotes
 todo: true
@@ -1294,13 +1294,13 @@ yaml: |
          line break'
    is same as: "this contains six spaces\nand one line break"
 php: |
-   array(
+   [
      'empty' => '',
      'second' => '! : \\ etc. can be used freely.',
      'third' => "a single quote ' must be escaped.",
      'span' => "this contains six spaces\nand one line break",
      'is same as' => "this contains six spaces\nand one line break"
-   )
+   ]
 ---
 test: Double quotes
 todo: true
@@ -1314,14 +1314,14 @@ yaml: |
          spaces"
    is equal to: "this contains four  spaces"
 php: |
-   array(
+   [
      'empty' => '',
      'second' => '! : etc. can be used freely.',
      'third' => 'a " or a \\ must be escaped.',
      'fourth' => "this value ends with an LF.\n",
      'span' => "this contains four  spaces",
      'is equal to' => "this contains four  spaces"
-   )
+   ]
 ---
 test: Unquoted strings
 todo: true
@@ -1350,7 +1350,7 @@ yaml: |
    note: { one-line keys: but multi-line values }
 
 php: |
-   array(
+   [
      'first' => 'There is no unquoted empty string.',
      'second' => 12,
      'third' => '12',
@@ -1358,7 +1358,7 @@ php: |
      'indicators' => "this has no comments. #:foo and bar# are both text.",
      'flow' => [ 'can span lines', 'like this' ],
      'note' => { 'one-line keys' => 'but multi-line values' }
-   )
+   ]
 ---
 test: Spanning sequences
 todo: true
@@ -1372,11 +1372,11 @@ yaml: |
      - one
      - two
 php: |
-   array(
+   [
      'flow' => [ 'one', 'two' ],
      'spanning' => [ 'one', 'two' ],
      'block' => [ 'one', 'two' ]
-   )
+   ]
 ---
 test: Flow mappings
 yaml: |
@@ -1387,10 +1387,10 @@ yaml: |
        one: 1
        two: 2
 php: |
-   array(
-     'flow' => array( 'one' => 1, 'two' => 2 ),
-     'block' => array( 'one' => 1, 'two' => 2 )
-   )
+   [
+     'flow' => [ 'one' => 1, 'two' => 2 ],
+     'block' => [ 'one' => 1, 'two' => 2 ]
+    ]
 ---
 test: Representations of 12
 todo: true
@@ -1412,7 +1412,7 @@ yaml: |
    - foo/bar
    - /a.*b/
 php: |
-   array( 12, '12', '12', '12', '12', '/foo/bar', 'd:/foo/bar', 'foo/bar', '/a.*b/' )
+   [ 12, '12', '12', '12', '12', '/foo/bar', 'd:/foo/bar', 'foo/bar', '/a.*b/' ]
 ---
 test: "Null"
 todo: true
@@ -1434,12 +1434,12 @@ yaml: |
          only two with values.
 
 php: |
-   array (
+   [
      'canonical' => null,
      'english' => null,
-     'sparse' => array( null, '2nd entry', null, '4th entry', null ]),
+     'sparse' => [ null, '2nd entry', null, '4th entry', null ]],
      'four' => 'This mapping has five keys, only two with values.'
-   )
+      ]
 ---
 test: Omap
 todo: true
@@ -1504,11 +1504,11 @@ yaml: |
    octal: 014
    hexadecimal: 0xC
 php: |
-   array(
+   [
      'canonical' => 12345,
      'octal' => 12,
      'hexadecimal' => 12
-   )
+   ]
 ---
 test: Float
 yaml: |
@@ -1517,12 +1517,12 @@ yaml: |
    negative infinity: -.inf
    not a number: .NaN
 php: |
-  array(
+  [
     'canonical' => 1230.15,
     'exponential' => 1230.15,
     'negative infinity' => log(0),
     'not a number' => -log(0)
-  )
+  ]
 ---
 test: Timestamp
 todo: true
@@ -1532,12 +1532,12 @@ yaml: |
    space separated: 2001-12-14 21:59:43.10 -05:00
    date (noon UTC): 2002-12-14
 ruby: |
-   array(
+   [
      'canonical' => YAML::mktime( 2001, 12, 15, 2, 59, 43, 0.10 ),
      'valid iso8601' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
      'space separated' => YAML::mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
      'date (noon UTC)' => Date.new( 2002, 12, 14 )
-   )
+   ]
 ---
 test: Binary
 todo: true
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsTypeTransfers.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsTypeTransfers.yml
index f1a7832956..9a03b7dae1 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/YtsTypeTransfers.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/YtsTypeTransfers.yml
@@ -25,14 +25,14 @@ yaml: |
     - No, I mean, "And what about Yaml?"
     - Oh, oh yeah. Uh.. Yaml for Ruby.
 php: |
-    array(
+    [
       "What's Yaml?",
       "It's for writing data structures in plain text.",
       "And?",
       "And what? That's not good enough for you?",
       "No, I mean, \"And what about Yaml?\"",
       "Oh, oh yeah. Uh.. Yaml for Ruby."
-    )
+    ]
 ---
 test: Indicators in Strings
 brief: >
@@ -43,11 +43,11 @@ yaml: |
     same for the pound sign: here we have it#in a string
     the comma can, honestly, be used in most cases: [ but not in, inline collections ]
 php: |
-    array(
+    [
       'the colon followed by space is an indicator' => 'but is a string:right here',
       'same for the pound sign' => 'here we have it#in a string',
-      'the comma can, honestly, be used in most cases' => array('but not in', 'inline collections')
-    )
+      'the comma can, honestly, be used in most cases' => ['but not in', 'inline collections']
+    ]
 ---
 test: Forcing Strings
 brief: >
@@ -57,10 +57,10 @@ yaml: |
     date string: !!str 2001-08-01
     number string: !!str 192
 php: |
-    array(
+    [
       'date string' => '2001-08-01',
       'number string' => '192'
-    )
+    ]
 ---
 test: Single-quoted Strings
 brief: >
@@ -75,12 +75,12 @@ yaml: |
     why do i hate them?: 'it''s very hard to explain'
     entities: '&pound; me'
 php: |
-    array(
+    [
       'all my favorite symbols' => '#:!/%.)',
       'a few i hate' => '&(*',
       'why do i hate them?' => 'it\'s very hard to explain',
       'entities' => '&pound; me'
-    )
+    ]
 ---
 test: Double-quoted Strings
 brief: >
@@ -90,9 +90,9 @@ brief: >
 yaml: |
     i know where i want my line breaks: "one here\nand another here\n"
 php: |
-    array(
+    [
       'i know where i want my line breaks' => "one here\nand another here\n"
-    )
+    ]
 ---
 test: Multi-line Quoted Strings
 todo: true
@@ -106,10 +106,10 @@ yaml: |
       let it go on and on to other lines
       until i end it with a quote."
 php: |
-    array('i want a long string' => "so i'm going to ".
+    ['i want a long string' => "so i'm going to ".
          "let it go on and on to other lines ".
          "until i end it with a quote."
-    )
+    ]
 
 ---
 test: Plain scalars
@@ -128,7 +128,7 @@ yaml: |
     - This would impair my skiing ability somewhat for the
       duration, as can be imagined.
 php: |
-    array(
+    [
       "My little toe is broken in two places;",
       "I'm crazy to have skied this way;",
       "I'm not the craziest he's seen, since there was always ".
@@ -139,7 +139,7 @@ php: |
       "He's going to put my foot in plaster for a month;",
       "This would impair my skiing ability somewhat for the duration, ".
          "as can be imagined."
-    )
+    ]
 ---
 test: 'Null'
 brief: >
@@ -149,11 +149,11 @@ yaml: |
     hosted by: Bob and David
     date of next season: ~
 php: |
-    array(
+    [
       'name' => 'Mr. Show',
       'hosted by' => 'Bob and David',
       'date of next season' => null
-    )
+    ]
 ---
 test: Boolean
 brief: >
@@ -162,10 +162,10 @@ yaml: |
     Is Gus a Liar?: true
     Do I rely on Gus for Sustenance?: false
 php: |
-    array(
+    [
       'Is Gus a Liar?' => true,
       'Do I rely on Gus for Sustenance?' => false
-    )
+    ]
 ---
 test: Integers
 dump_skip: true
@@ -177,10 +177,10 @@ yaml: |
     zero: 0
     simple: 12
 php: |
-    array(
+    [
       'zero' => 0,
       'simple' => 12,
-    )
+    ]
 ---
 test: Floats
 dump_skip: true
@@ -192,10 +192,10 @@ yaml: |
      a simple float: 2.00
      scientific notation: 1.00009e+3
 php: |
-     array(
+     [
        'a simple float' => 2.0,
        'scientific notation' => 1000.09
-     )
+     ]
 ---
 test: Time
 todo: true
@@ -208,10 +208,10 @@ yaml: |
     iso8601: 2001-12-14t21:59:43.10-05:00
     space separated: 2001-12-14 21:59:43.10 -05:00
 php: |
-    array(
+    [
       'iso8601' => mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" ),
       'space separated' => mktime( 2001, 12, 14, 21, 59, 43, 0.10, "-05:00" )
-    )
+    ]
 ---
 test: Date
 todo: true
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/booleanMappingKeys.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/booleanMappingKeys.yml
index 26799e8e7b..88287f1b9f 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/booleanMappingKeys.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/booleanMappingKeys.yml
@@ -5,7 +5,7 @@ yaml: |
   true: true
   false: false
 php: |
-  array(
+  [
     'true' => true,
     'false' => false,
-  )
+  ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/escapedCharacters.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/escapedCharacters.yml
index cc0356d36a..87d352db11 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/escapedCharacters.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/escapedCharacters.yml
@@ -142,14 +142,14 @@ test: Double quotes with a line feed
 yaml: |
    { double: "some value\n \"some quoted string\" and 'some single quotes one'" }
 php: |
-    array(
+    [
         'double' => "some value\n \"some quoted string\" and 'some single quotes one'"
-    )
+    ]
 ---
 test: Backslashes
 yaml: |
     { single: 'foo\Var', no-quotes: foo\Var, double: "foo\\Var" }
 php: |
-    array(
+    [
         'single' => 'foo\Var', 'no-quotes' => 'foo\Var', 'double' => 'foo\Var'
-    )
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/nullMappingKey.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/nullMappingKey.yml
index 7dcadc7299..cd90f7b4cb 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/nullMappingKey.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/nullMappingKey.yml
@@ -4,6 +4,6 @@ spec: 2.21
 yaml: |
   null: ~
 php: |
-  array(
+  [
     'null' => null,
-  )
+  ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/numericMappingKeys.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/numericMappingKeys.yml
index 9cfb7713a5..246447e4d4 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/numericMappingKeys.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/numericMappingKeys.yml
@@ -6,7 +6,7 @@ yaml: |
   1: foo
   0: bar
 php: |
-  array(1 => 'foo', 0 => 'bar')
+  [1 => 'foo', 0 => 'bar']
 ---
 test: Integers as Map Keys
 brief: >
@@ -16,8 +16,8 @@ yaml: |
     2: two
     3: three
 php: |
-    array(
+    [
         1 => 'one',
         2 => 'two',
         3 => 'three'
-    )
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfComments.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfComments.yml
index b72a9b6996..af3ab38597 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfComments.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfComments.yml
@@ -11,7 +11,7 @@ yaml: |
     ex6: foo#foo # comment here
     ex7: foo 	# ignore me # and me
 php: |
-    array('ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo', 'ex5' => 'foo', 'ex6' => 'foo#foo', 'ex7' => 'foo')
+    ['ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo', 'ex5' => 'foo', 'ex6' => 'foo#foo', 'ex7' => 'foo']
 ---
 test: Comments in the middle
 brief: >
@@ -24,7 +24,7 @@ yaml: |
     # some comment
     # some comment
 php: |
-    array('foo' => array('bar' => 'foo'))
+    ['foo' => ['bar' => 'foo']]
 ---
 test: Comments on a hash line
 brief: >
@@ -33,7 +33,7 @@ yaml: |
     foo:   # a comment
       foo: bar # a comment
 php: |
-    array('foo' => array('foo' => 'bar'))
+    ['foo' => ['foo' => 'bar']]
 ---
 test: 'Value starting with a #'
 brief: >
@@ -41,7 +41,7 @@ brief: >
 yaml: |
     foo:   '#bar'
 php: |
-    array('foo' => '#bar')
+    ['foo' => '#bar']
 ---
 test: Document starting with a comment and a separator
 brief: >
@@ -51,7 +51,7 @@ yaml: |
     ---
     foo: bar # a comment
 php: |
-    array('foo' => 'bar')
+    ['foo' => 'bar']
 ---
 test: Comment containing a colon on a hash line
 brief: >
@@ -65,7 +65,7 @@ brief: >
     'Hash key containing a #'
 yaml: 'foo#bar: baz'
 php: |
-    array('foo#bar' => 'baz')
+    ['foo#bar' => 'baz']
 ---
 test: 'Hash key ending with a space and a #'
 brief: >
@@ -73,4 +73,4 @@ brief: >
 yaml: |
     'foo #': baz
 php: |
-    array('foo #' => 'baz')
+    ['foo #' => 'baz']
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfCompact.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfCompact.yml
index 1339d23a63..8cadae2c1a 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfCompact.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfCompact.yml
@@ -13,22 +13,22 @@ yaml: |
       nick: Biggies
     quantity: 1
 php: |
-  array (
-    array (
+  [
+    [
       'item' => 'Super Hoop',
-    ),
-    array (
+    ],
+    [
       'item' => 'Basketball',
       'quantity' => 1,
-    ),
-    array (
-      'item' => array(
+    ],
+    [
+      'item' => [
         'name' => 'Big Shoes',
         'nick' => 'Biggies'
-      ),
+      ],
       'quantity' => 1
-    )
-  )
+    ]
+  ]
 ---
 test: Compact notation combined with inline notation
 brief: |
@@ -39,18 +39,18 @@ yaml: |
     - { item: Super Hoop, quantity: 1 }
     - [ Basketball, Big Shoes ]
 php: |
-  array (
-    'items' => array (
-      array (
+  [
+    'items' => [
+      [
         'item' => 'Super Hoop',
         'quantity' => 1,
-      ),
-      array (
+      ],
+      [
         'Basketball',
         'Big Shoes'
-      )
-    )
-  )
+      ]
+      ]
+    ]
 --- %YAML:1.0
 test: Compact notation
 brief: |
@@ -66,22 +66,22 @@ yaml: |
       nick: Biggies
     quantity: 1
 php: |
-  array (
-    array (
+  [
+    [
       'item' => 'Super Hoop',
-    ),
-    array (
+    ],
+    [
       'item' => 'Basketball',
       'quantity' => 1,
-    ),
-    array (
-      'item' => array(
+    ],
+    [
+      'item' => [
         'name' => 'Big Shoes',
         'nick' => 'Biggies'
-      ),
+      ],
       'quantity' => 1
-    )
-  )
+    ]
+  ]
 ---
 test: Compact notation combined with inline notation
 brief: |
@@ -92,18 +92,18 @@ yaml: |
     - { item: Super Hoop, quantity: 1 }
     - [ Basketball, Big Shoes ]
 php: |
-  array (
-    'items' => array (
-      array (
+  [
+    'items' => [
+      [
         'item' => 'Super Hoop',
         'quantity' => 1,
-      ),
-      array (
+      ],
+      [
         'Basketball',
         'Big Shoes'
-      )
-    )
-  )
+      ]
+    ]
+  ]
 --- %YAML:1.0
 test: Compact notation
 brief: |
@@ -119,22 +119,22 @@ yaml: |
       nick: Biggies
     quantity: 1
 php: |
-  array (
-    array (
+  [
+    [
       'item' => 'Super Hoop',
-    ),
-    array (
+    ],
+    [
       'item' => 'Basketball',
       'quantity' => 1,
-    ),
-    array (
-      'item' => array(
+    ],
+    [
+      'item' => [
         'name' => 'Big Shoes',
         'nick' => 'Biggies'
-      ),
+      ],
       'quantity' => 1
-    )
-  )
+    ]
+  ]
 ---
 test: Compact notation combined with inline notation
 brief: |
@@ -145,15 +145,15 @@ yaml: |
     - { item: Super Hoop, quantity: 1 }
     - [ Basketball, Big Shoes ]
 php: |
-  array (
-    'items' => array (
-      array (
+  [
+    'items' => [
+      [
         'item' => 'Super Hoop',
         'quantity' => 1,
-      ),
-      array (
+      ],
+      [
         'Basketball',
         'Big Shoes'
-      )
-    )
-  )
+      ]
+    ]
+  ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfMergeKey.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfMergeKey.yml
index 83264cfab8..af787ae435 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfMergeKey.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfMergeKey.yml
@@ -46,16 +46,16 @@ yaml: |
     head_inline: &head_inline { <<: [ *foo , *dong , *foo2 ] }
     recursive_inline: { <<: *head_inline, c: { <<: *foo2 } }
 php: |
-    array(
-        'foo' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull'),
-        'bar' => array('a' => 'before', 'd' => 'other', 'e' => null, 'b' => 'new', 'c' => array('foo' => 'bar', 'bar' => 'foo'), 'x' => 'Oren'),
-        'bar_inline' => array('a' => 'before', 'd' => 'other', 'b' => 'new', 'c' => array('foo' => 'bar', 'bar' => 'foo'), 'e' => 'notnull', 'x' => 'Oren'),
-        'foo2' => array('a' => 'Ballmer'),
-        'ding' => array('fi', 'fei', 'fo', 'fam'),
-        'check' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam', 'isit' => 'tested'),
-        'head' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
-        'taz' => array('a' => 'Steve', 'w' => array('p' => 1234)),
-        'nested' => array('a' => 'Steve', 'w' => array('p' => 12345), 'd' => 'Doug', 'z' => array('p' => 12345)),
-        'head_inline' => array('a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
-        'recursive_inline' => array('a' => 'Steve', 'b' => 'Clark', 'c' => array('a' => 'Ballmer'), 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'),
-    )
+    [
+        'foo' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull'],
+        'bar' => ['a' => 'before', 'd' => 'other', 'e' => null, 'b' => 'new', 'c' => ['foo' => 'bar', 'bar' => 'foo'], 'x' => 'Oren'],
+        'bar_inline' => ['a' => 'before', 'd' => 'other', 'b' => 'new', 'c' => ['foo' => 'bar', 'bar' => 'foo'], 'e' => 'notnull', 'x' => 'Oren'],
+        'foo2' => ['a' => 'Ballmer'],
+        'ding' => ['fi', 'fei', 'fo', 'fam'],
+        'check' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam', 'isit' => 'tested'],
+        'head' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'],
+        'taz' => ['a' => 'Steve', 'w' => ['p' => 1234]],
+        'nested' => ['a' => 'Steve', 'w' => ['p' => 12345], 'd' => 'Doug', 'z' => ['p' => 12345]],
+        'head_inline' => ['a' => 'Steve', 'b' => 'Clark', 'c' => 'Brian', 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'],
+        'recursive_inline' => ['a' => 'Steve', 'b' => 'Clark', 'c' => ['a' => 'Ballmer'], 'e' => 'notnull', 'fi', 'fei', 'fo', 'fam'],
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfObjects.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfObjects.yml
index ee124b2446..144615f2a8 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfObjects.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfObjects.yml
@@ -8,4 +8,4 @@ yaml: |
     ex3: 'foo # bar' # comment
     ex4: foo # comment
 php: |
-    array('ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo')
+    ['ex1' => 'foo # bar', 'ex2' => 'foo # bar', 'ex3' => 'foo # bar', 'ex4' => 'foo']
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfQuotes.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfQuotes.yml
index 7c60baec97..c8326fdb20 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfQuotes.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfQuotes.yml
@@ -5,7 +5,7 @@ brief: >
 yaml: |
     foo: '| bar'
 php: |
-    array('foo' => '| bar')
+    ['foo' => '| bar']
 ---
 test: A key can be a quoted string
 brief: >
@@ -19,15 +19,15 @@ yaml: |
     "foo4: ": bar
     foo5: { "foo \" bar: ": bar, 'foo '' bar: ': bar }
 php: |
-    array(
+    [
       'foo1' => 'bar',
       'foo2' => 'bar',
       'foo " bar' => 'bar',
       'foo \' bar' => 'bar',
       'foo3: ' => 'bar',
       'foo4: ' => 'bar',
-      'foo5' => array(
+      'foo5' => [
         'foo " bar: ' => 'bar',
         'foo \' bar: ' => 'bar',
-      ),
-    )
+      ],
+    ]
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/sfTests.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/sfTests.yml
index 2a0b9c8741..2ea417a728 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/sfTests.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/sfTests.yml
@@ -5,19 +5,19 @@ brief: >
 yaml: |
     stripped_title: { name: "foo bar", help: "bar foo" }
 php: |
-    array('stripped_title' => array('name' => 'foo bar', 'help' => 'bar foo'))
+    ['stripped_title' => ['name' => 'foo bar', 'help' => 'bar foo']]
 ---
 test: Empty sequence
 yaml: |
     foo: [ ]
 php: |
-    array('foo' => array())
+    ['foo' => []]
 ---
 test: Empty value
 yaml: |
     foo:
 php: |
-    array('foo' => null)
+    ['foo' => null]
 ---
 test: Inline string parsing
 brief: >
@@ -25,7 +25,7 @@ brief: >
 yaml: |
     test: ['complex: string', 'another [string]']
 php: |
-    array('test' => array('complex: string', 'another [string]'))
+    ['test' => ['complex: string', 'another [string]']]
 ---
 test: Boolean
 brief: >
@@ -40,7 +40,7 @@ yaml: |
     - 'null'
     - '~'
 php: |
-    array(
+    [
       false,
       true,
       null,
@@ -49,7 +49,7 @@ php: |
       'true',
       'null',
       '~',
-    )
+    ]
 ---
 test: Empty lines in literal blocks
 brief: >
@@ -63,7 +63,7 @@ yaml: |
         
       bar
 php: |
-  array('foo' => array('bar' => "foo\n\n\n  \nbar\n"))
+  ['foo' => ['bar' => "foo\n\n\n  \nbar\n"]]
 ---
 test: Empty lines in folded blocks
 brief: >
@@ -77,7 +77,7 @@ yaml: |
       
       bar
 php: |
-  array('foo' => array('bar' => "\nfoo\n\nbar\n"))
+  ['foo' => ['bar' => "\nfoo\n\nbar\n"]]
 ---
 test: IP addresses
 brief: >
@@ -85,7 +85,7 @@ brief: >
 yaml: |
   foo: 10.0.0.2
 php: |
-  array('foo' => '10.0.0.2')
+  ['foo' => '10.0.0.2']
 ---
 test: A sequence with an embedded mapping
 brief: >
@@ -94,28 +94,28 @@ yaml: |
   - foo
   - bar: { bar: foo }
 php: |
-  array('foo', array('bar' => array('bar' => 'foo')))
+  ['foo', ['bar' => ['bar' => 'foo']]]
 ---
 test: Octal
 brief: as in spec example 2.19, octal value is converted
 yaml: |
   foo: 0123
 php: |
-  array('foo' => 83)
+  ['foo' => 83]
 ---
 test: Octal strings
 brief: Octal notation in a string must remain a string
 yaml: |
   foo: "0123"
 php: |
-  array('foo' => '0123')
+  ['foo' => '0123']
 ---
 test: Octal strings
 brief: Octal notation in a string must remain a string
 yaml: |
   foo: '0123'
 php: |
-  array('foo' => '0123')
+  ['foo' => '0123']
 ---
 test: Octal strings
 brief: Octal notation in a string must remain a string
@@ -123,18 +123,18 @@ yaml: |
   foo: |
     0123
 php: |
-  array('foo' => "0123\n")
+  ['foo' => "0123\n"]
 ---
 test: Document as a simple hash
 brief: Document as a simple hash
 yaml: |
   { foo: bar }
 php: |
-  array('foo' => 'bar')
+  ['foo' => 'bar']
 ---
 test: Document as a simple array
 brief: Document as a simple array
 yaml: |
   [ foo, bar ]
 php: |
-  array('foo', 'bar')
+  ['foo', 'bar']
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml
index 0c96108e99..c85952df47 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml
@@ -8,7 +8,7 @@ yaml: |
     - item2
     - item3
 php: |
-    array('collection' => array('item1', 'item2', 'item3'))
+    ['collection' => ['item1', 'item2', 'item3']]
 ---
 test: Nested unindented collection (two levels)
 brief: >
@@ -20,7 +20,7 @@ yaml: |
         - b
         - c
 php: |
-    array('collection' => array('key' => array('a', 'b', 'c')))
+    ['collection' => ['key' => ['a', 'b', 'c']]]
 ---
 test: Nested unindented collection (three levels)
 brief: >
@@ -33,7 +33,7 @@ yaml: |
             - two
             - three
 php: |
-    array('collection' => array('key' => array('subkey' => array('one', 'two', 'three'))))
+    ['collection' => ['key' => ['subkey' => ['one', 'two', 'three']]]]
 ---
 test: Key/value after unindented collection (1)
 brief: >
@@ -46,7 +46,7 @@ yaml: |
         - c
     foo: bar
 php: |
-    array('collection' => array('key' => array('a', 'b', 'c')), 'foo' => 'bar')
+    ['collection' => ['key' => ['a', 'b', 'c']], 'foo' => 'bar']
 ---
 test: Key/value after unindented collection (at the same level)
 brief: >
@@ -59,7 +59,7 @@ yaml: |
         - c
         foo: bar
 php: |
-    array('collection' => array('key' => array('a', 'b', 'c'), 'foo' => 'bar'))
+    ['collection' => ['key' => ['a', 'b', 'c'], 'foo' => 'bar']]
 ---
 test: Shortcut Key after unindented collection
 brief: >
@@ -69,7 +69,7 @@ yaml: |
     - key: foo
       foo: bar
 php: |
-    array('collection' => array(array('key' => 'foo', 'foo' => 'bar')))
+    ['collection' => [['key' => 'foo', 'foo' => 'bar']]]
 ---
 test: Shortcut Key after unindented collection with custom spaces
 brief: >
@@ -79,4 +79,4 @@ yaml: |
     -  key: foo
        foo: bar
 php: |
-    array('collection' => array(array('key' => 'foo', 'foo' => 'bar')))
+    ['collection' => [['key' => 'foo', 'foo' => 'bar']]]
diff --git a/src/Symfony/Component/Yaml/Tests/InlineTest.php b/src/Symfony/Component/Yaml/Tests/InlineTest.php
index 7ba46bdffb..9da834369f 100644
--- a/src/Symfony/Component/Yaml/Tests/InlineTest.php
+++ b/src/Symfony/Component/Yaml/Tests/InlineTest.php
@@ -54,13 +54,13 @@ class InlineTest extends TestCase
 
     public function getTestsForParsePhpConstants()
     {
-        return array(
-            array('!php/const Symfony\Component\Yaml\Yaml::PARSE_CONSTANT', Yaml::PARSE_CONSTANT),
-            array('!php/const PHP_INT_MAX', PHP_INT_MAX),
-            array('[!php/const PHP_INT_MAX]', array(PHP_INT_MAX)),
-            array('{ foo: !php/const PHP_INT_MAX }', array('foo' => PHP_INT_MAX)),
-            array('!php/const NULL', null),
-        );
+        return [
+            ['!php/const Symfony\Component\Yaml\Yaml::PARSE_CONSTANT', Yaml::PARSE_CONSTANT],
+            ['!php/const PHP_INT_MAX', PHP_INT_MAX],
+            ['[!php/const PHP_INT_MAX]', [PHP_INT_MAX]],
+            ['{ foo: !php/const PHP_INT_MAX }', ['foo' => PHP_INT_MAX]],
+            ['!php/const NULL', null],
+        ];
     }
 
     /**
@@ -99,7 +99,7 @@ class InlineTest extends TestCase
         }
 
         try {
-            $requiredLocales = array('fr_FR.UTF-8', 'fr_FR.UTF8', 'fr_FR.utf-8', 'fr_FR.utf8', 'French_France.1252');
+            $requiredLocales = ['fr_FR.UTF-8', 'fr_FR.UTF8', 'fr_FR.utf-8', 'fr_FR.utf8', 'French_France.1252'];
             if (false === setlocale(LC_NUMERIC, $requiredLocales)) {
                 $this->markTestSkipped('Could not set any of required locales: '.implode(', ', $requiredLocales));
             }
@@ -200,31 +200,31 @@ class InlineTest extends TestCase
      */
     public function testParseReferences($yaml, $expected)
     {
-        $this->assertSame($expected, Inline::parse($yaml, 0, array('var' => 'var-value')));
+        $this->assertSame($expected, Inline::parse($yaml, 0, ['var' => 'var-value']));
     }
 
     public function getDataForParseReferences()
     {
-        return array(
-            'scalar' => array('*var', 'var-value'),
-            'list' => array('[ *var ]', array('var-value')),
-            'list-in-list' => array('[[ *var ]]', array(array('var-value'))),
-            'map-in-list' => array('[ { key: *var } ]', array(array('key' => 'var-value'))),
-            'embedded-mapping-in-list' => array('[ key: *var ]', array(array('key' => 'var-value'))),
-            'map' => array('{ key: *var }', array('key' => 'var-value')),
-            'list-in-map' => array('{ key: [*var] }', array('key' => array('var-value'))),
-            'map-in-map' => array('{ foo: { bar: *var } }', array('foo' => array('bar' => 'var-value'))),
-        );
+        return [
+            'scalar' => ['*var', 'var-value'],
+            'list' => ['[ *var ]', ['var-value']],
+            'list-in-list' => ['[[ *var ]]', [['var-value']]],
+            'map-in-list' => ['[ { key: *var } ]', [['key' => 'var-value']]],
+            'embedded-mapping-in-list' => ['[ key: *var ]', [['key' => 'var-value']]],
+            'map' => ['{ key: *var }', ['key' => 'var-value']],
+            'list-in-map' => ['{ key: [*var] }', ['key' => ['var-value']]],
+            'map-in-map' => ['{ foo: { bar: *var } }', ['foo' => ['bar' => 'var-value']]],
+        ];
     }
 
     public function testParseMapReferenceInSequence()
     {
-        $foo = array(
+        $foo = [
             'a' => 'Steve',
             'b' => 'Clark',
             'c' => 'Brian',
-        );
-        $this->assertSame(array($foo), Inline::parse('[*foo]', 0, array('foo' => $foo)));
+        ];
+        $this->assertSame([$foo], Inline::parse('[*foo]', 0, ['foo' => $foo]));
     }
 
     /**
@@ -262,7 +262,7 @@ class InlineTest extends TestCase
 
     public function getReservedIndicators()
     {
-        return array(array('@'), array('`'));
+        return [['@'], ['`']];
     }
 
     /**
@@ -282,7 +282,7 @@ class InlineTest extends TestCase
 
     public function getScalarIndicators()
     {
-        return array(array('|'), array('>'), array('%'));
+        return [['|'], ['>'], ['%']];
     }
 
     /**
@@ -295,240 +295,240 @@ class InlineTest extends TestCase
 
     public function getDataForIsHash()
     {
-        return array(
-            array(array(), false),
-            array(array(1, 2, 3), false),
-            array(array(2 => 1, 1 => 2, 0 => 3), true),
-            array(array('foo' => 1, 'bar' => 2), true),
-        );
+        return [
+            [[], false],
+            [[1, 2, 3], false],
+            [[2 => 1, 1 => 2, 0 => 3], true],
+            [['foo' => 1, 'bar' => 2], true],
+        ];
     }
 
     public function getTestsForParse()
     {
-        return array(
-            array('', ''),
-            array('null', null),
-            array('false', false),
-            array('true', true),
-            array('12', 12),
-            array('-12', -12),
-            array('1_2', 12),
-            array('_12', '_12'),
-            array('12_', 12),
-            array('"quoted string"', 'quoted string'),
-            array("'quoted string'", 'quoted string'),
-            array('12.30e+02', 12.30e+02),
-            array('123.45_67', 123.4567),
-            array('0x4D2', 0x4D2),
-            array('0x_4_D_2_', 0x4D2),
-            array('02333', 02333),
-            array('0_2_3_3_3', 02333),
-            array('.Inf', -log(0)),
-            array('-.Inf', log(0)),
-            array("'686e444'", '686e444'),
-            array('686e444', 646e444),
-            array('123456789123456789123456789123456789', '123456789123456789123456789123456789'),
-            array('"foo\r\nbar"', "foo\r\nbar"),
-            array("'foo#bar'", 'foo#bar'),
-            array("'foo # bar'", 'foo # bar'),
-            array("'#cfcfcf'", '#cfcfcf'),
-            array('::form_base.html.twig', '::form_base.html.twig'),
+        return [
+            ['', ''],
+            ['null', null],
+            ['false', false],
+            ['true', true],
+            ['12', 12],
+            ['-12', -12],
+            ['1_2', 12],
+            ['_12', '_12'],
+            ['12_', 12],
+            ['"quoted string"', 'quoted string'],
+            ["'quoted string'", 'quoted string'],
+            ['12.30e+02', 12.30e+02],
+            ['123.45_67', 123.4567],
+            ['0x4D2', 0x4D2],
+            ['0x_4_D_2_', 0x4D2],
+            ['02333', 02333],
+            ['0_2_3_3_3', 02333],
+            ['.Inf', -log(0)],
+            ['-.Inf', log(0)],
+            ["'686e444'", '686e444'],
+            ['686e444', 646e444],
+            ['123456789123456789123456789123456789', '123456789123456789123456789123456789'],
+            ['"foo\r\nbar"', "foo\r\nbar"],
+            ["'foo#bar'", 'foo#bar'],
+            ["'foo # bar'", 'foo # bar'],
+            ["'#cfcfcf'", '#cfcfcf'],
+            ['::form_base.html.twig', '::form_base.html.twig'],
 
             // Pre-YAML-1.2 booleans
-            array("'y'", 'y'),
-            array("'n'", 'n'),
-            array("'yes'", 'yes'),
-            array("'no'", 'no'),
-            array("'on'", 'on'),
-            array("'off'", 'off'),
+            ["'y'", 'y'],
+            ["'n'", 'n'],
+            ["'yes'", 'yes'],
+            ["'no'", 'no'],
+            ["'on'", 'on'],
+            ["'off'", 'off'],
 
-            array('2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)),
-            array('2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)),
-            array('2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)),
-            array('1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)),
-            array('1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)),
+            ['2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)],
+            ['2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)],
+            ['2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)],
+            ['1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)],
+            ['1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)],
 
-            array('"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''),
-            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+            ['"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''],
+            ["'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''],
 
             // sequences
             // urls are no key value mapping. see #3609. Valid yaml "key: value" mappings require a space after the colon
-            array('[foo, http://urls.are/no/mappings, false, null, 12]', array('foo', 'http://urls.are/no/mappings', false, null, 12)),
-            array('[  foo  ,   bar , false  ,  null     ,  12  ]', array('foo', 'bar', false, null, 12)),
-            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+            ['[foo, http://urls.are/no/mappings, false, null, 12]', ['foo', 'http://urls.are/no/mappings', false, null, 12]],
+            ['[  foo  ,   bar , false  ,  null     ,  12  ]', ['foo', 'bar', false, null, 12]],
+            ['[\'foo,bar\', \'foo bar\']', ['foo,bar', 'foo bar']],
 
             // mappings
-            array('{foo: bar,bar: foo,"false": false, "null": null,integer: 12}', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
-            array('{ foo  : bar, bar : foo, "false"  :   false,  "null"  :   null,  integer :  12  }', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
-            array('{foo: \'bar\', bar: \'foo: bar\'}', array('foo' => 'bar', 'bar' => 'foo: bar')),
-            array('{\'foo\': \'bar\', "bar": \'foo: bar\'}', array('foo' => 'bar', 'bar' => 'foo: bar')),
-            array('{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', array('foo\'' => 'bar', 'bar"' => 'foo: bar')),
-            array('{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', array('foo: ' => 'bar', 'bar: ' => 'foo: bar')),
-            array('{"foo:bar": "baz"}', array('foo:bar' => 'baz')),
-            array('{"foo":"bar"}', array('foo' => 'bar')),
+            ['{foo: bar,bar: foo,"false": false, "null": null,integer: 12}', ['foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12]],
+            ['{ foo  : bar, bar : foo, "false"  :   false,  "null"  :   null,  integer :  12  }', ['foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12]],
+            ['{foo: \'bar\', bar: \'foo: bar\'}', ['foo' => 'bar', 'bar' => 'foo: bar']],
+            ['{\'foo\': \'bar\', "bar": \'foo: bar\'}', ['foo' => 'bar', 'bar' => 'foo: bar']],
+            ['{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', ['foo\'' => 'bar', 'bar"' => 'foo: bar']],
+            ['{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', ['foo: ' => 'bar', 'bar: ' => 'foo: bar']],
+            ['{"foo:bar": "baz"}', ['foo:bar' => 'baz']],
+            ['{"foo":"bar"}', ['foo' => 'bar']],
 
             // nested sequences and mappings
-            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
-            array('[foo, {bar: foo}]', array('foo', array('bar' => 'foo'))),
-            array('{ foo: {bar: foo} }', array('foo' => array('bar' => 'foo'))),
-            array('{ foo: [bar, foo] }', array('foo' => array('bar', 'foo'))),
-            array('{ foo:{bar: foo} }', array('foo' => array('bar' => 'foo'))),
-            array('{ foo:[bar, foo] }', array('foo' => array('bar', 'foo'))),
+            ['[foo, [bar, foo]]', ['foo', ['bar', 'foo']]],
+            ['[foo, {bar: foo}]', ['foo', ['bar' => 'foo']]],
+            ['{ foo: {bar: foo} }', ['foo' => ['bar' => 'foo']]],
+            ['{ foo: [bar, foo] }', ['foo' => ['bar', 'foo']]],
+            ['{ foo:{bar: foo} }', ['foo' => ['bar' => 'foo']]],
+            ['{ foo:[bar, foo] }', ['foo' => ['bar', 'foo']]],
 
-            array('[  foo, [  bar, foo  ]  ]', array('foo', array('bar', 'foo'))),
+            ['[  foo, [  bar, foo  ]  ]', ['foo', ['bar', 'foo']]],
 
-            array('[{ foo: {bar: foo} }]', array(array('foo' => array('bar' => 'foo')))),
+            ['[{ foo: {bar: foo} }]', [['foo' => ['bar' => 'foo']]]],
 
-            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+            ['[foo, [bar, [foo, [bar, foo]], foo]]', ['foo', ['bar', ['foo', ['bar', 'foo']], 'foo']]],
 
-            array('[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', array('foo', array('bar' => 'foo', 'foo' => array('foo', array('bar' => 'foo'))), array('foo', array('bar' => 'foo')))),
+            ['[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', ['foo', ['bar' => 'foo', 'foo' => ['foo', ['bar' => 'foo']]], ['foo', ['bar' => 'foo']]]],
 
-            array('[foo, bar: { foo: bar }]', array('foo', '1' => array('bar' => array('foo' => 'bar')))),
-            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
-        );
+            ['[foo, bar: { foo: bar }]', ['foo', '1' => ['bar' => ['foo' => 'bar']]]],
+            ['[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', ['foo', '@foo.baz', ['%foo%' => 'foo is %foo%', 'bar' => '%foo%'], true, '@service_container']],
+        ];
     }
 
     public function getTestsForParseWithMapObjects()
     {
-        return array(
-            array('', ''),
-            array('null', null),
-            array('false', false),
-            array('true', true),
-            array('12', 12),
-            array('-12', -12),
-            array('"quoted string"', 'quoted string'),
-            array("'quoted string'", 'quoted string'),
-            array('12.30e+02', 12.30e+02),
-            array('0x4D2', 0x4D2),
-            array('02333', 02333),
-            array('.Inf', -log(0)),
-            array('-.Inf', log(0)),
-            array("'686e444'", '686e444'),
-            array('686e444', 646e444),
-            array('123456789123456789123456789123456789', '123456789123456789123456789123456789'),
-            array('"foo\r\nbar"', "foo\r\nbar"),
-            array("'foo#bar'", 'foo#bar'),
-            array("'foo # bar'", 'foo # bar'),
-            array("'#cfcfcf'", '#cfcfcf'),
-            array('::form_base.html.twig', '::form_base.html.twig'),
+        return [
+            ['', ''],
+            ['null', null],
+            ['false', false],
+            ['true', true],
+            ['12', 12],
+            ['-12', -12],
+            ['"quoted string"', 'quoted string'],
+            ["'quoted string'", 'quoted string'],
+            ['12.30e+02', 12.30e+02],
+            ['0x4D2', 0x4D2],
+            ['02333', 02333],
+            ['.Inf', -log(0)],
+            ['-.Inf', log(0)],
+            ["'686e444'", '686e444'],
+            ['686e444', 646e444],
+            ['123456789123456789123456789123456789', '123456789123456789123456789123456789'],
+            ['"foo\r\nbar"', "foo\r\nbar"],
+            ["'foo#bar'", 'foo#bar'],
+            ["'foo # bar'", 'foo # bar'],
+            ["'#cfcfcf'", '#cfcfcf'],
+            ['::form_base.html.twig', '::form_base.html.twig'],
 
-            array('2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)),
-            array('2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)),
-            array('2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)),
-            array('1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)),
-            array('1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)),
+            ['2007-10-30', gmmktime(0, 0, 0, 10, 30, 2007)],
+            ['2007-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 2007)],
+            ['2007-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 2007)],
+            ['1960-10-30 02:59:43 Z', gmmktime(2, 59, 43, 10, 30, 1960)],
+            ['1730-10-30T02:59:43Z', gmmktime(2, 59, 43, 10, 30, 1730)],
 
-            array('"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''),
-            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+            ['"a \\"string\\" with \'quoted strings inside\'"', 'a "string" with \'quoted strings inside\''],
+            ["'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''],
 
             // sequences
             // urls are no key value mapping. see #3609. Valid yaml "key: value" mappings require a space after the colon
-            array('[foo, http://urls.are/no/mappings, false, null, 12]', array('foo', 'http://urls.are/no/mappings', false, null, 12)),
-            array('[  foo  ,   bar , false  ,  null     ,  12  ]', array('foo', 'bar', false, null, 12)),
-            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+            ['[foo, http://urls.are/no/mappings, false, null, 12]', ['foo', 'http://urls.are/no/mappings', false, null, 12]],
+            ['[  foo  ,   bar , false  ,  null     ,  12  ]', ['foo', 'bar', false, null, 12]],
+            ['[\'foo,bar\', \'foo bar\']', ['foo,bar', 'foo bar']],
 
             // mappings
-            array('{foo: bar,bar: foo,"false": false,"null": null,integer: 12}', (object) array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12), Yaml::PARSE_OBJECT_FOR_MAP),
-            array('{ foo  : bar, bar : foo,  "false"  :   false,  "null"  :   null,  integer :  12  }', (object) array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12), Yaml::PARSE_OBJECT_FOR_MAP),
-            array('{foo: \'bar\', bar: \'foo: bar\'}', (object) array('foo' => 'bar', 'bar' => 'foo: bar')),
-            array('{\'foo\': \'bar\', "bar": \'foo: bar\'}', (object) array('foo' => 'bar', 'bar' => 'foo: bar')),
-            array('{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', (object) array('foo\'' => 'bar', 'bar"' => 'foo: bar')),
-            array('{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', (object) array('foo: ' => 'bar', 'bar: ' => 'foo: bar')),
-            array('{"foo:bar": "baz"}', (object) array('foo:bar' => 'baz')),
-            array('{"foo":"bar"}', (object) array('foo' => 'bar')),
+            ['{foo: bar,bar: foo,"false": false,"null": null,integer: 12}', (object) ['foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12], Yaml::PARSE_OBJECT_FOR_MAP],
+            ['{ foo  : bar, bar : foo,  "false"  :   false,  "null"  :   null,  integer :  12  }', (object) ['foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12], Yaml::PARSE_OBJECT_FOR_MAP],
+            ['{foo: \'bar\', bar: \'foo: bar\'}', (object) ['foo' => 'bar', 'bar' => 'foo: bar']],
+            ['{\'foo\': \'bar\', "bar": \'foo: bar\'}', (object) ['foo' => 'bar', 'bar' => 'foo: bar']],
+            ['{\'foo\'\'\': \'bar\', "bar\"": \'foo: bar\'}', (object) ['foo\'' => 'bar', 'bar"' => 'foo: bar']],
+            ['{\'foo: \': \'bar\', "bar: ": \'foo: bar\'}', (object) ['foo: ' => 'bar', 'bar: ' => 'foo: bar']],
+            ['{"foo:bar": "baz"}', (object) ['foo:bar' => 'baz']],
+            ['{"foo":"bar"}', (object) ['foo' => 'bar']],
 
             // nested sequences and mappings
-            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
-            array('[foo, {bar: foo}]', array('foo', (object) array('bar' => 'foo'))),
-            array('{ foo: {bar: foo} }', (object) array('foo' => (object) array('bar' => 'foo'))),
-            array('{ foo: [bar, foo] }', (object) array('foo' => array('bar', 'foo'))),
+            ['[foo, [bar, foo]]', ['foo', ['bar', 'foo']]],
+            ['[foo, {bar: foo}]', ['foo', (object) ['bar' => 'foo']]],
+            ['{ foo: {bar: foo} }', (object) ['foo' => (object) ['bar' => 'foo']]],
+            ['{ foo: [bar, foo] }', (object) ['foo' => ['bar', 'foo']]],
 
-            array('[  foo, [  bar, foo  ]  ]', array('foo', array('bar', 'foo'))),
+            ['[  foo, [  bar, foo  ]  ]', ['foo', ['bar', 'foo']]],
 
-            array('[{ foo: {bar: foo} }]', array((object) array('foo' => (object) array('bar' => 'foo')))),
+            ['[{ foo: {bar: foo} }]', [(object) ['foo' => (object) ['bar' => 'foo']]]],
 
-            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+            ['[foo, [bar, [foo, [bar, foo]], foo]]', ['foo', ['bar', ['foo', ['bar', 'foo']], 'foo']]],
 
-            array('[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', array('foo', (object) array('bar' => 'foo', 'foo' => array('foo', (object) array('bar' => 'foo'))), array('foo', (object) array('bar' => 'foo')))),
+            ['[foo, {bar: foo, foo: [foo, {bar: foo}]}, [foo, {bar: foo}]]', ['foo', (object) ['bar' => 'foo', 'foo' => ['foo', (object) ['bar' => 'foo']]], ['foo', (object) ['bar' => 'foo']]]],
 
-            array('[foo, bar: { foo: bar }]', array('foo', '1' => (object) array('bar' => (object) array('foo' => 'bar')))),
-            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', (object) array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+            ['[foo, bar: { foo: bar }]', ['foo', '1' => (object) ['bar' => (object) ['foo' => 'bar']]]],
+            ['[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', ['foo', '@foo.baz', (object) ['%foo%' => 'foo is %foo%', 'bar' => '%foo%'], true, '@service_container']],
 
-            array('{}', new \stdClass()),
-            array('{ foo  : bar, bar : {}  }', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
-            array('{ foo  : [], bar : {}  }', (object) array('foo' => array(), 'bar' => new \stdClass())),
-            array('{foo: \'bar\', bar: {} }', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
-            array('{\'foo\': \'bar\', "bar": {}}', (object) array('foo' => 'bar', 'bar' => new \stdClass())),
-            array('{\'foo\': \'bar\', "bar": \'{}\'}', (object) array('foo' => 'bar', 'bar' => '{}')),
+            ['{}', new \stdClass()],
+            ['{ foo  : bar, bar : {}  }', (object) ['foo' => 'bar', 'bar' => new \stdClass()]],
+            ['{ foo  : [], bar : {}  }', (object) ['foo' => [], 'bar' => new \stdClass()]],
+            ['{foo: \'bar\', bar: {} }', (object) ['foo' => 'bar', 'bar' => new \stdClass()]],
+            ['{\'foo\': \'bar\', "bar": {}}', (object) ['foo' => 'bar', 'bar' => new \stdClass()]],
+            ['{\'foo\': \'bar\', "bar": \'{}\'}', (object) ['foo' => 'bar', 'bar' => '{}']],
 
-            array('[foo, [{}, {}]]', array('foo', array(new \stdClass(), new \stdClass()))),
-            array('[foo, [[], {}]]', array('foo', array(array(), new \stdClass()))),
-            array('[foo, [[{}, {}], {}]]', array('foo', array(array(new \stdClass(), new \stdClass()), new \stdClass()))),
-            array('[foo, {bar: {}}]', array('foo', '1' => (object) array('bar' => new \stdClass()))),
-        );
+            ['[foo, [{}, {}]]', ['foo', [new \stdClass(), new \stdClass()]]],
+            ['[foo, [[], {}]]', ['foo', [[], new \stdClass()]]],
+            ['[foo, [[{}, {}], {}]]', ['foo', [[new \stdClass(), new \stdClass()], new \stdClass()]]],
+            ['[foo, {bar: {}}]', ['foo', '1' => (object) ['bar' => new \stdClass()]]],
+        ];
     }
 
     public function getTestsForDump()
     {
-        return array(
-            array('null', null),
-            array('false', false),
-            array('true', true),
-            array('12', 12),
-            array("'1_2'", '1_2'),
-            array('_12', '_12'),
-            array("'12_'", '12_'),
-            array("'quoted string'", 'quoted string'),
-            array('!!float 1230', 12.30e+02),
-            array('1234', 0x4D2),
-            array('1243', 02333),
-            array("'0x_4_D_2_'", '0x_4_D_2_'),
-            array("'0_2_3_3_3'", '0_2_3_3_3'),
-            array('.Inf', -log(0)),
-            array('-.Inf', log(0)),
-            array("'686e444'", '686e444'),
-            array('"foo\r\nbar"', "foo\r\nbar"),
-            array("'foo#bar'", 'foo#bar'),
-            array("'foo # bar'", 'foo # bar'),
-            array("'#cfcfcf'", '#cfcfcf'),
+        return [
+            ['null', null],
+            ['false', false],
+            ['true', true],
+            ['12', 12],
+            ["'1_2'", '1_2'],
+            ['_12', '_12'],
+            ["'12_'", '12_'],
+            ["'quoted string'", 'quoted string'],
+            ['!!float 1230', 12.30e+02],
+            ['1234', 0x4D2],
+            ['1243', 02333],
+            ["'0x_4_D_2_'", '0x_4_D_2_'],
+            ["'0_2_3_3_3'", '0_2_3_3_3'],
+            ['.Inf', -log(0)],
+            ['-.Inf', log(0)],
+            ["'686e444'", '686e444'],
+            ['"foo\r\nbar"', "foo\r\nbar"],
+            ["'foo#bar'", 'foo#bar'],
+            ["'foo # bar'", 'foo # bar'],
+            ["'#cfcfcf'", '#cfcfcf'],
 
-            array("'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''),
+            ["'a \"string\" with ''quoted strings inside'''", 'a "string" with \'quoted strings inside\''],
 
-            array("'-dash'", '-dash'),
-            array("'-'", '-'),
+            ["'-dash'", '-dash'],
+            ["'-'", '-'],
 
             // Pre-YAML-1.2 booleans
-            array("'y'", 'y'),
-            array("'n'", 'n'),
-            array("'yes'", 'yes'),
-            array("'no'", 'no'),
-            array("'on'", 'on'),
-            array("'off'", 'off'),
+            ["'y'", 'y'],
+            ["'n'", 'n'],
+            ["'yes'", 'yes'],
+            ["'no'", 'no'],
+            ["'on'", 'on'],
+            ["'off'", 'off'],
 
             // sequences
-            array('[foo, bar, false, null, 12]', array('foo', 'bar', false, null, 12)),
-            array('[\'foo,bar\', \'foo bar\']', array('foo,bar', 'foo bar')),
+            ['[foo, bar, false, null, 12]', ['foo', 'bar', false, null, 12]],
+            ['[\'foo,bar\', \'foo bar\']', ['foo,bar', 'foo bar']],
 
             // mappings
-            array('{ foo: bar, bar: foo, \'false\': false, \'null\': null, integer: 12 }', array('foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12)),
-            array('{ foo: bar, bar: \'foo: bar\' }', array('foo' => 'bar', 'bar' => 'foo: bar')),
+            ['{ foo: bar, bar: foo, \'false\': false, \'null\': null, integer: 12 }', ['foo' => 'bar', 'bar' => 'foo', 'false' => false, 'null' => null, 'integer' => 12]],
+            ['{ foo: bar, bar: \'foo: bar\' }', ['foo' => 'bar', 'bar' => 'foo: bar']],
 
             // nested sequences and mappings
-            array('[foo, [bar, foo]]', array('foo', array('bar', 'foo'))),
+            ['[foo, [bar, foo]]', ['foo', ['bar', 'foo']]],
 
-            array('[foo, [bar, [foo, [bar, foo]], foo]]', array('foo', array('bar', array('foo', array('bar', 'foo')), 'foo'))),
+            ['[foo, [bar, [foo, [bar, foo]], foo]]', ['foo', ['bar', ['foo', ['bar', 'foo']], 'foo']]],
 
-            array('{ foo: { bar: foo } }', array('foo' => array('bar' => 'foo'))),
+            ['{ foo: { bar: foo } }', ['foo' => ['bar' => 'foo']]],
 
-            array('[foo, { bar: foo }]', array('foo', array('bar' => 'foo'))),
+            ['[foo, { bar: foo }]', ['foo', ['bar' => 'foo']]],
 
-            array('[foo, { bar: foo, foo: [foo, { bar: foo }] }, [foo, { bar: foo }]]', array('foo', array('bar' => 'foo', 'foo' => array('foo', array('bar' => 'foo'))), array('foo', array('bar' => 'foo')))),
+            ['[foo, { bar: foo, foo: [foo, { bar: foo }] }, [foo, { bar: foo }]]', ['foo', ['bar' => 'foo', 'foo' => ['foo', ['bar' => 'foo']]], ['foo', ['bar' => 'foo']]]],
 
-            array('[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', array('foo', '@foo.baz', array('%foo%' => 'foo is %foo%', 'bar' => '%foo%'), true, '@service_container')),
+            ['[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', ['foo', '@foo.baz', ['%foo%' => 'foo is %foo%', 'bar' => '%foo%'], true, '@service_container']],
 
-            array('{ foo: { bar: { 1: 2, baz: 3 } } }', array('foo' => array('bar' => array(1 => 2, 'baz' => 3)))),
-        );
+            ['{ foo: { bar: { 1: 2, baz: 3 } } }', ['foo' => ['bar' => [1 => 2, 'baz' => 3]]]],
+        ];
     }
 
     /**
@@ -556,12 +556,12 @@ class InlineTest extends TestCase
 
     public function getTimestampTests()
     {
-        return array(
-            'canonical' => array('2001-12-15T02:59:43.1Z', 2001, 12, 15, 2, 59, 43.1, '+0000'),
-            'ISO-8601' => array('2001-12-15t21:59:43.10-05:00', 2001, 12, 16, 2, 59, 43.1, '-0500'),
-            'spaced' => array('2001-12-15 21:59:43.10 -5', 2001, 12, 16, 2, 59, 43.1, '-0500'),
-            'date' => array('2001-12-15', 2001, 12, 15, 0, 0, 0, '+0000'),
-        );
+        return [
+            'canonical' => ['2001-12-15T02:59:43.1Z', 2001, 12, 15, 2, 59, 43.1, '+0000'],
+            'ISO-8601' => ['2001-12-15t21:59:43.10-05:00', 2001, 12, 16, 2, 59, 43.1, '-0500'],
+            'spaced' => ['2001-12-15 21:59:43.10 -5', 2001, 12, 16, 2, 59, 43.1, '-0500'],
+            'date' => ['2001-12-15', 2001, 12, 15, 0, 0, 0, '+0000'],
+        ];
     }
 
     /**
@@ -574,7 +574,7 @@ class InlineTest extends TestCase
         $expected->setDate($year, $month, $day);
         $expected->setTime($hour, $minute, $second, 1000000 * ($second - (int) $second));
 
-        $expectedNested = array('nested' => array($expected));
+        $expectedNested = ['nested' => [$expected]];
         $yamlNested = "{nested: [$yaml]}";
 
         $this->assertEquals($expectedNested, Inline::parse($yamlNested, Yaml::PARSE_DATETIME));
@@ -590,13 +590,13 @@ class InlineTest extends TestCase
 
     public function getDateTimeDumpTests()
     {
-        $tests = array();
+        $tests = [];
 
         $dateTime = new \DateTime('2001-12-15 21:59:43', new \DateTimeZone('UTC'));
-        $tests['date-time-utc'] = array($dateTime, '2001-12-15T21:59:43+00:00');
+        $tests['date-time-utc'] = [$dateTime, '2001-12-15T21:59:43+00:00'];
 
         $dateTime = new \DateTimeImmutable('2001-07-15 21:59:43', new \DateTimeZone('Europe/Berlin'));
-        $tests['immutable-date-time-europe-berlin'] = array($dateTime, '2001-07-15T21:59:43+02:00');
+        $tests['immutable-date-time-europe-berlin'] = [$dateTime, '2001-07-15T21:59:43+02:00'];
 
         return $tests;
     }
@@ -611,11 +611,11 @@ class InlineTest extends TestCase
 
     public function getBinaryData()
     {
-        return array(
-            'enclosed with double quotes' => array('!!binary "SGVsbG8gd29ybGQ="'),
-            'enclosed with single quotes' => array("!!binary 'SGVsbG8gd29ybGQ='"),
-            'containing spaces' => array('!!binary  "SGVs bG8gd 29ybGQ="'),
-        );
+        return [
+            'enclosed with double quotes' => ['!!binary "SGVsbG8gd29ybGQ="'],
+            'enclosed with single quotes' => ["!!binary 'SGVsbG8gd29ybGQ='"],
+            'containing spaces' => ['!!binary  "SGVs bG8gd 29ybGQ="'],
+        ];
     }
 
     /**
@@ -635,12 +635,12 @@ class InlineTest extends TestCase
 
     public function getInvalidBinaryData()
     {
-        return array(
-            'length not a multiple of four' => array('!!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'),
-            'invalid characters' => array('!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'),
-            'too many equals characters' => array('!!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'),
-            'misplaced equals character' => array('!!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'),
-        );
+        return [
+            'length not a multiple of four' => ['!!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'],
+            'invalid characters' => ['!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'],
+            'too many equals characters' => ['!!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'],
+            'misplaced equals character' => ['!!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'],
+        ];
     }
 
     /**
@@ -656,7 +656,7 @@ class InlineTest extends TestCase
     {
         $longStringWithQuotes = str_repeat("x\r\n\\\"x\"x", 1000);
 
-        $yamlString = Inline::dump(array('longStringWithQuotes' => $longStringWithQuotes));
+        $yamlString = Inline::dump(['longStringWithQuotes' => $longStringWithQuotes]);
         $arrayFromYaml = Inline::parse($yamlString);
 
         $this->assertEquals($longStringWithQuotes, $arrayFromYaml['longStringWithQuotes']);
@@ -681,15 +681,15 @@ class InlineTest extends TestCase
 
     public function getTestsForNullValues()
     {
-        return array(
-            'null before closing curly brace' => array('{foo:}', array('foo' => null)),
-            'null before comma' => array('{foo:, bar: baz}', array('foo' => null, 'bar' => 'baz')),
-        );
+        return [
+            'null before closing curly brace' => ['{foo:}', ['foo' => null]],
+            'null before comma' => ['{foo:, bar: baz}', ['foo' => null, 'bar' => 'baz']],
+        ];
     }
 
     public function testTheEmptyStringIsAValidMappingKey()
     {
-        $this->assertSame(array('' => 'foo'), Inline::parse('{ "": foo }'));
+        $this->assertSame(['' => 'foo'], Inline::parse('{ "": foo }'));
     }
 
     /**
@@ -705,12 +705,12 @@ class InlineTest extends TestCase
 
     public function getNotPhpCompatibleMappingKeyData()
     {
-        return array(
-            'boolean-true' => array('{true: "foo"}', array('true' => 'foo')),
-            'boolean-false' => array('{false: "foo"}', array('false' => 'foo')),
-            'null' => array('{null: "foo"}', array('null' => 'foo')),
-            'float' => array('{0.25: "foo"}', array('0.25' => 'foo')),
-        );
+        return [
+            'boolean-true' => ['{true: "foo"}', ['true' => 'foo']],
+            'boolean-false' => ['{false: "foo"}', ['false' => 'foo']],
+            'null' => ['{null: "foo"}', ['null' => 'foo']],
+            'float' => ['{0.25: "foo"}', ['0.25' => 'foo']],
+        ];
     }
 
     public function testTagWithoutValueInSequence()
diff --git a/src/Symfony/Component/Yaml/Tests/ParserTest.php b/src/Symfony/Component/Yaml/Tests/ParserTest.php
index 93d499d32d..7e465595ca 100644
--- a/src/Symfony/Component/Yaml/Tests/ParserTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParserTest.php
@@ -55,12 +55,12 @@ class ParserTest extends TestCase
     public function testTabsInYaml()
     {
         // test tabs in YAML
-        $yamls = array(
+        $yamls = [
             "foo:\n	bar",
             "foo:\n 	bar",
             "foo:\n	 bar",
             "foo:\n 	 bar",
-        );
+        ];
 
         foreach ($yamls as $yaml) {
             try {
@@ -87,7 +87,7 @@ EOF;
 
     public function getBlockChompingTests()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<'EOF'
 foo: |-
@@ -98,11 +98,11 @@ bar: |-
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo",
             'bar' => "one\ntwo",
-        );
-        $tests['Literal block chomping strip with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping strip with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |-
@@ -115,19 +115,19 @@ bar: |-
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo",
             'bar' => "one\ntwo",
-        );
-        $tests['Literal block chomping strip with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping strip with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 {}
 
 
 EOF;
-        $expected = array();
-        $tests['Literal block chomping strip with multiple trailing newlines after a 1-liner'] = array($expected, $yaml);
+        $expected = [];
+        $tests['Literal block chomping strip with multiple trailing newlines after a 1-liner'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |-
@@ -137,11 +137,11 @@ bar: |-
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo",
             'bar' => "one\ntwo",
-        );
-        $tests['Literal block chomping strip without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping strip without trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |
@@ -152,11 +152,11 @@ bar: |
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n",
             'bar' => "one\ntwo\n",
-        );
-        $tests['Literal block chomping clip with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping clip with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |
@@ -169,11 +169,11 @@ bar: |
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n",
             'bar' => "one\ntwo\n",
-        );
-        $tests['Literal block chomping clip with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping clip with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo:
@@ -182,14 +182,14 @@ foo:
 
     two
 EOF;
-        $expected = array(
-            'foo' => array(
-                array(
+        $expected = [
+            'foo' => [
+                [
                     'bar' => "one\n\ntwo",
-                ),
-            ),
-        );
-        $tests['Literal block chomping clip with embedded blank line inside unindented collection'] = array($expected, $yaml);
+                ],
+            ],
+        ];
+        $tests['Literal block chomping clip with embedded blank line inside unindented collection'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |
@@ -199,11 +199,11 @@ bar: |
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n",
             'bar' => "one\ntwo",
-        );
-        $tests['Literal block chomping clip without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping clip without trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |+
@@ -214,11 +214,11 @@ bar: |+
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n",
             'bar' => "one\ntwo\n",
-        );
-        $tests['Literal block chomping keep with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping keep with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |+
@@ -231,11 +231,11 @@ bar: |+
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n\n",
             'bar' => "one\ntwo\n\n",
-        );
-        $tests['Literal block chomping keep with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping keep with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: |+
@@ -245,11 +245,11 @@ bar: |+
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one\ntwo\n",
             'bar' => "one\ntwo",
-        );
-        $tests['Literal block chomping keep without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Literal block chomping keep without trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >-
@@ -260,11 +260,11 @@ bar: >-
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => 'one two',
             'bar' => 'one two',
-        );
-        $tests['Folded block chomping strip with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping strip with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >-
@@ -277,11 +277,11 @@ bar: >-
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => 'one two',
             'bar' => 'one two',
-        );
-        $tests['Folded block chomping strip with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping strip with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >-
@@ -291,11 +291,11 @@ bar: >-
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => 'one two',
             'bar' => 'one two',
-        );
-        $tests['Folded block chomping strip without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping strip without trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >
@@ -306,11 +306,11 @@ bar: >
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n",
             'bar' => "one two\n",
-        );
-        $tests['Folded block chomping clip with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping clip with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >
@@ -323,11 +323,11 @@ bar: >
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n",
             'bar' => "one two\n",
-        );
-        $tests['Folded block chomping clip with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping clip with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >
@@ -337,11 +337,11 @@ bar: >
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n",
             'bar' => 'one two',
-        );
-        $tests['Folded block chomping clip without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping clip without trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >+
@@ -352,11 +352,11 @@ bar: >+
     two
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n",
             'bar' => "one two\n",
-        );
-        $tests['Folded block chomping keep with single trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping keep with single trailing newline'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >+
@@ -369,11 +369,11 @@ bar: >+
 
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n\n",
             'bar' => "one two\n\n",
-        );
-        $tests['Folded block chomping keep with multiple trailing newlines'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping keep with multiple trailing newlines'] = [$expected, $yaml];
 
         $yaml = <<<'EOF'
 foo: >+
@@ -383,11 +383,11 @@ bar: >+
     one
     two
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "one two\n",
             'bar' => 'one two',
-        );
-        $tests['Folded block chomping keep without trailing newline'] = array($expected, $yaml);
+        ];
+        $tests['Folded block chomping keep without trailing newline'] = [$expected, $yaml];
 
         return $tests;
     }
@@ -414,9 +414,9 @@ foo: |-
     bar
 
 EOF;
-        $expected = array(
+        $expected = [
             'foo' => "\n\nbar",
-        );
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -427,7 +427,7 @@ EOF;
 foo: !php/object O:30:"Symfony\Component\Yaml\Tests\B":1:{s:1:"b";s:3:"foo";}
 bar: 1
 EOF;
-        $this->assertEquals(array('foo' => new B(), 'bar' => 1), $this->parser->parse($input, Yaml::PARSE_OBJECT), '->parse() is able to parse objects');
+        $this->assertEquals(['foo' => new B(), 'bar' => 1], $this->parser->parse($input, Yaml::PARSE_OBJECT), '->parse() is able to parse objects');
     }
 
     public function testObjectSupportDisabledButNoExceptions()
@@ -436,7 +436,7 @@ EOF;
 foo: !php/object O:30:"Symfony\Tests\Component\Yaml\B":1:{s:1:"b";s:3:"foo";}
 bar: 1
 EOF;
-        $this->assertEquals(array('foo' => null, 'bar' => 1), $this->parser->parse($input), '->parse() does not parse objects');
+        $this->assertEquals(['foo' => null, 'bar' => 1], $this->parser->parse($input), '->parse() does not parse objects');
     }
 
     /**
@@ -451,7 +451,7 @@ EOF;
 
     public function getObjectForMapTests()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<'EOF'
 foo:
@@ -459,20 +459,20 @@ foo:
 EOF;
         $expected = new \stdClass();
         $expected->foo = new \stdClass();
-        $expected->foo->fiz = array('cat');
-        $tests['mapping'] = array($yaml, $expected);
+        $expected->foo->fiz = ['cat'];
+        $tests['mapping'] = [$yaml, $expected];
 
         $yaml = '{ "foo": "bar", "fiz": "cat" }';
         $expected = new \stdClass();
         $expected->foo = 'bar';
         $expected->fiz = 'cat';
-        $tests['inline-mapping'] = array($yaml, $expected);
+        $tests['inline-mapping'] = [$yaml, $expected];
 
         $yaml = "foo: bar\nbaz: foobar";
         $expected = new \stdClass();
         $expected->foo = 'bar';
         $expected->baz = 'foobar';
-        $tests['object-for-map-is-applied-after-parsing'] = array($yaml, $expected);
+        $tests['object-for-map-is-applied-after-parsing'] = [$yaml, $expected];
 
         $yaml = <<<'EOT'
 array:
@@ -480,12 +480,12 @@ array:
   - key: two
 EOT;
         $expected = new \stdClass();
-        $expected->array = array();
+        $expected->array = [];
         $expected->array[0] = new \stdClass();
         $expected->array[0]->key = 'one';
         $expected->array[1] = new \stdClass();
         $expected->array[1]->key = 'two';
-        $tests['nest-map-and-sequence'] = array($yaml, $expected);
+        $tests['nest-map-and-sequence'] = [$yaml, $expected];
 
         $yaml = <<<'YAML'
 map:
@@ -496,7 +496,7 @@ YAML;
         $expected->map = new \stdClass();
         $expected->map->{1} = 'one';
         $expected->map->{2} = 'two';
-        $tests['numeric-keys'] = array($yaml, $expected);
+        $tests['numeric-keys'] = [$yaml, $expected];
 
         $yaml = <<<'YAML'
 map:
@@ -507,7 +507,7 @@ YAML;
         $expected->map = new \stdClass();
         $expected->map->{0} = 'one';
         $expected->map->{1} = 'two';
-        $tests['zero-indexed-numeric-keys'] = array($yaml, $expected);
+        $tests['zero-indexed-numeric-keys'] = [$yaml, $expected];
 
         return $tests;
     }
@@ -529,9 +529,9 @@ EOF;
     {
         $yaml = "items:  \n  foo: bar";
 
-        $expected = array(
-            'items' => array('foo' => 'bar'),
-        );
+        $expected = [
+            'items' => ['foo' => 'bar'],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -541,11 +541,11 @@ EOF;
      */
     public function testNonUtf8Exception()
     {
-        $yamls = array(
+        $yamls = [
             iconv('UTF-8', 'ISO-8859-1', "foo: 'äöüß'"),
             iconv('UTF-8', 'ISO-8859-15', "euro: '€'"),
             iconv('UTF-8', 'CP1252', "cp1252: '©ÉÇáñ'"),
-        );
+        ];
 
         foreach ($yamls as $yaml) {
             try {
@@ -636,19 +636,19 @@ a:
 - foo
 d: e
 EOT;
-        $expected = array(
-            'a' => array(
-                array(
-                    'b' => array(
-                        array(
+        $expected = [
+            'a' => [
+                [
+                    'b' => [
+                        [
                             'bar' => 'baz',
-                        ),
-                    ),
-                ),
+                        ],
+                    ],
+                ],
                 'foo',
-            ),
+            ],
             'd' => 'e',
-        );
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -662,12 +662,12 @@ a:
 # comment
     d: e
 EOT;
-        $expected = array(
-            'a' => array(
-                'b' => array('c'),
+        $expected = [
+            'a' => [
+                'b' => ['c'],
                 'd' => 'e',
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -683,25 +683,25 @@ a:
         1.1
 # another comment
 EOT;
-        $expected = array(
-            'a' => array(
-                'b' => array(),
+        $expected = [
+            'a' => [
+                'b' => [],
                 'd' => 1.1,
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
 
     public function getParseExceptionNotAffectedMultiLineStringLastResortParsing()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<'EOT'
 a
     b:
 EOT;
-        $tests['parse error on first line'] = array($yaml);
+        $tests['parse error on first line'] = [$yaml];
 
         $yaml = <<<'EOT'
 a
@@ -709,12 +709,12 @@ a
 b
     c:
 EOT;
-        $tests['parse error due to inconsistent indentation'] = array($yaml);
+        $tests['parse error due to inconsistent indentation'] = [$yaml];
 
         $yaml = <<<'EOT'
  &  *  !  |  >  '  "  %  @  ` #, { asd a;sdasd }-@^qw3
 EOT;
-        $tests['symfony/symfony/issues/22967#issuecomment-322067742'] = array($yaml);
+        $tests['symfony/symfony/issues/22967#issuecomment-322067742'] = [$yaml];
 
         return $tests;
     }
@@ -736,9 +736,9 @@ test:
   true
   yes you can
 EOT;
-        $expected = array(
+        $expected = [
             'test' => 'You can have things that don\'t look like strings here true yes you can',
-        );
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
 
@@ -747,9 +747,9 @@ a:
     b
        c
 EOT;
-        $expected = array(
+        $expected = [
             'a' => 'b c',
-        );
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -805,11 +805,11 @@ parent:
     child: duplicate
     child: duplicate
 EOD;
-        $expected = array(
-            'parent' => array(
+        $expected = [
+            'parent' => [
                 'child' => 'first',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expected, Yaml::parse($input));
     }
 
@@ -823,11 +823,11 @@ EOD;
 parent: { child: first, child: duplicate }
 parent: { child: duplicate, child: duplicate }
 EOD;
-        $expected = array(
-            'parent' => array(
+        $expected = [
+            'parent' => [
                 'child' => 'first',
-            ),
-        );
+            ],
+        ];
         $this->assertSame($expected, Yaml::parse($input));
     }
 
@@ -844,30 +844,30 @@ EOD;
 
     public function getParseExceptionOnDuplicateData()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<EOD
 parent: { child: first, child: duplicate }
 EOD;
-        $tests[] = array($yaml, 'child', 1);
+        $tests[] = [$yaml, 'child', 1];
 
         $yaml = <<<EOD
 parent:
   child: first,
   child: duplicate
 EOD;
-        $tests[] = array($yaml, 'child', 3);
+        $tests[] = [$yaml, 'child', 3];
 
         $yaml = <<<EOD
 parent: { child: foo }
 parent: { child: bar }
 EOD;
-        $tests[] = array($yaml, 'parent', 2);
+        $tests[] = [$yaml, 'parent', 2];
 
         $yaml = <<<EOD
 parent: { child_mapping: { value: bar},  child_mapping: { value: bar} }
 EOD;
-        $tests[] = array($yaml, 'child_mapping', 1);
+        $tests[] = [$yaml, 'child_mapping', 1];
 
         $yaml = <<<EOD
 parent:
@@ -876,12 +876,12 @@ parent:
   child_mapping:
     value: bar
 EOD;
-        $tests[] = array($yaml, 'child_mapping', 4);
+        $tests[] = [$yaml, 'child_mapping', 4];
 
         $yaml = <<<EOD
 parent: { child_sequence: ['key1', 'key2', 'key3'],  child_sequence: ['key1', 'key2', 'key3'] }
 EOD;
-        $tests[] = array($yaml, 'child_sequence', 1);
+        $tests[] = [$yaml, 'child_sequence', 1];
 
         $yaml = <<<EOD
 parent:
@@ -894,7 +894,7 @@ parent:
     - key2
     - key3
 EOD;
-        $tests[] = array($yaml, 'child_sequence', 6);
+        $tests[] = [$yaml, 'child_sequence', 6];
 
         return $tests;
     }
@@ -905,21 +905,21 @@ EOD;
 hash:
 EOF;
 
-        $this->assertEquals(array('hash' => null), Yaml::parse($input));
+        $this->assertEquals(['hash' => null], Yaml::parse($input));
     }
 
     public function testCommentAtTheRootIndent()
     {
-        $this->assertEquals(array(
-            'services' => array(
-                'app.foo_service' => array(
+        $this->assertEquals([
+            'services' => [
+                'app.foo_service' => [
                     'class' => 'Foo',
-                ),
-                'app/bar_service' => array(
+                ],
+                'app/bar_service' => [
                     'class' => 'Bar',
-                ),
-            ),
-        ), Yaml::parse(<<<'EOF'
+                ],
+            ],
+        ], Yaml::parse(<<<'EOF'
 # comment 1
 services:
 # comment 2
@@ -936,7 +936,7 @@ EOF
 
     public function testStringBlockWithComments()
     {
-        $this->assertEquals(array('content' => <<<'EOT'
+        $this->assertEquals(['content' => <<<'EOT'
 # comment 1
 header
 
@@ -947,7 +947,7 @@ header
 
 footer # comment3
 EOT
-        ), Yaml::parse(<<<'EOF'
+        ], Yaml::parse(<<<'EOF'
 content: |
     # comment 1
     header
@@ -964,7 +964,7 @@ EOF
 
     public function testFoldedStringBlockWithComments()
     {
-        $this->assertEquals(array(array('content' => <<<'EOT'
+        $this->assertEquals([['content' => <<<'EOT'
 # comment 1
 header
 
@@ -975,7 +975,7 @@ header
 
 footer # comment3
 EOT
-        )), Yaml::parse(<<<'EOF'
+        ]], Yaml::parse(<<<'EOF'
 -
     content: |
         # comment 1
@@ -993,7 +993,7 @@ EOF
 
     public function testNestedFoldedStringBlockWithComments()
     {
-        $this->assertEquals(array(array(
+        $this->assertEquals([[
             'title' => 'some title',
             'content' => <<<'EOT'
 # comment 1
@@ -1006,7 +1006,7 @@ header
 
 footer # comment3
 EOT
-        )), Yaml::parse(<<<'EOF'
+        ]], Yaml::parse(<<<'EOF'
 -
     title: some title
     content: |
@@ -1025,17 +1025,17 @@ EOF
 
     public function testReferenceResolvingInInlineStrings()
     {
-        $this->assertEquals(array(
+        $this->assertEquals([
             'var' => 'var-value',
             'scalar' => 'var-value',
-            'list' => array('var-value'),
-            'list_in_list' => array(array('var-value')),
-            'map_in_list' => array(array('key' => 'var-value')),
-            'embedded_mapping' => array(array('key' => 'var-value')),
-            'map' => array('key' => 'var-value'),
-            'list_in_map' => array('key' => array('var-value')),
-            'map_in_map' => array('foo' => array('bar' => 'var-value')),
-        ), Yaml::parse(<<<'EOF'
+            'list' => ['var-value'],
+            'list_in_list' => [['var-value']],
+            'map_in_list' => [['key' => 'var-value']],
+            'embedded_mapping' => [['key' => 'var-value']],
+            'map' => ['key' => 'var-value'],
+            'list_in_map' => ['key' => ['var-value']],
+            'map_in_map' => ['foo' => ['bar' => 'var-value']],
+        ], Yaml::parse(<<<'EOF'
 var:  &var var-value
 scalar: *var
 list: [ *var ]
@@ -1057,7 +1057,7 @@ EOF
 foo: 1
 bar: 2
 EOF;
-        $this->assertEquals(array('foo' => 1, 'bar' => 2), $this->parser->parse($yaml));
+        $this->assertEquals(['foo' => 1, 'bar' => 2], $this->parser->parse($yaml));
     }
 
     /**
@@ -1102,14 +1102,14 @@ EOF;
 '~': 'null'
 EOF;
 
-        $expected = array(
+        $expected = [
             '1.2' => 'bar',
             '1.3' => 'baz',
             'true' => 'foo',
             'false' => 'bar',
             'null' => 'null',
             '~' => 'null',
-        );
+        ];
 
         $this->assertEquals($expected, $this->parser->parse($yaml));
     }
@@ -1134,7 +1134,7 @@ foo:
     bar: foobar # Note: a comment after a colon
 EOT;
 
-        $this->assertSame(array('foo' => array('bar' => 'foobar')), $this->parser->parse($yaml));
+        $this->assertSame(['foo' => ['bar' => 'foobar']], $this->parser->parse($yaml));
     }
 
     /**
@@ -1147,7 +1147,7 @@ EOT;
 
     public function getCommentLikeStringInScalarBlockData()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<'EOT'
 pages:
@@ -1164,9 +1164,9 @@ pages:
 
             footer # comment3
 EOT;
-        $expected = array(
-            'pages' => array(
-                array(
+        $expected = [
+            'pages' => [
+                [
                     'title' => 'some title',
                     'content' => <<<'EOT'
 # comment 1
@@ -1180,10 +1180,10 @@ header
 footer # comment3
 EOT
                     ,
-                ),
-            ),
-        );
-        $tests[] = array($yaml, $expected);
+                ],
+            ],
+        ];
+        $tests[] = [$yaml, $expected];
 
         $yaml = <<<'EOT'
 test: |
@@ -1200,7 +1200,7 @@ collection:
         # bar
         baz
 EOT;
-        $expected = array(
+        $expected = [
             'test' => <<<'EOT'
 foo
 # bar
@@ -1208,8 +1208,8 @@ baz
 
 EOT
             ,
-            'collection' => array(
-                array(
+            'collection' => [
+                [
                     'one' => <<<'EOT'
 foo
 # bar
@@ -1217,18 +1217,18 @@ baz
 
 EOT
                     ,
-                ),
-                array(
+                ],
+                [
                     'two' => <<<'EOT'
 foo
 # bar
 baz
 EOT
                     ,
-                ),
-            ),
-        );
-        $tests[] = array($yaml, $expected);
+                ],
+            ],
+        ];
+        $tests[] = [$yaml, $expected];
 
         $yaml = <<<'EOT'
 foo:
@@ -1240,17 +1240,17 @@ foo:
 # comment
     foobar: ~
 EOT;
-        $expected = array(
-            'foo' => array(
-                'bar' => array(
+        $expected = [
+            'foo' => [
+                'bar' => [
                     'scalar-block' => "line1 line2>\n",
-                ),
-                'baz' => array(
+                ],
+                'baz' => [
                     'foobar' => null,
-                ),
-            ),
-        );
-        $tests[] = array($yaml, $expected);
+                ],
+            ],
+        ];
+        $tests[] = [$yaml, $expected];
 
         $yaml = <<<'EOT'
 a:
@@ -1260,13 +1260,13 @@ a:
 #        second row
     d: hello
 EOT;
-        $expected = array(
-            'a' => array(
+        $expected = [
+            'a' => [
                 'b' => 'hello',
                 'd' => 'hello',
-            ),
-        );
-        $tests[] = array($yaml, $expected);
+            ],
+        ];
+        $tests[] = [$yaml, $expected];
 
         return $tests;
     }
@@ -1284,13 +1284,13 @@ test: >
 EOT;
 
         $this->assertSame(
-            array(
+            [
                 'test' => <<<'EOT'
 <h2>A heading</h2>
 <ul> <li>a list</li> <li>may be a good example</li> </ul>
 EOT
                 ,
-            ),
+            ],
             $this->parser->parse($yaml)
         );
     }
@@ -1308,7 +1308,7 @@ test: >
 EOT;
 
         $this->assertSame(
-            array(
+            [
                 'test' => <<<'EOT'
 <h2>A heading</h2>
 <ul>
@@ -1317,7 +1317,7 @@ EOT;
 </ul>
 EOT
                 ,
-            ),
+            ],
             $this->parser->parse($yaml)
         );
     }
@@ -1327,28 +1327,28 @@ EOT
      */
     public function testParseBinaryData($data)
     {
-        $this->assertSame(array('data' => 'Hello world'), $this->parser->parse($data));
+        $this->assertSame(['data' => 'Hello world'], $this->parser->parse($data));
     }
 
     public function getBinaryData()
     {
-        return array(
-            'enclosed with double quotes' => array('data: !!binary "SGVsbG8gd29ybGQ="'),
-            'enclosed with single quotes' => array("data: !!binary 'SGVsbG8gd29ybGQ='"),
-            'containing spaces' => array('data: !!binary  "SGVs bG8gd 29ybGQ="'),
-            'in block scalar' => array(
+        return [
+            'enclosed with double quotes' => ['data: !!binary "SGVsbG8gd29ybGQ="'],
+            'enclosed with single quotes' => ["data: !!binary 'SGVsbG8gd29ybGQ='"],
+            'containing spaces' => ['data: !!binary  "SGVs bG8gd 29ybGQ="'],
+            'in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVsbG8gd29ybGQ=
 EOT
-    ),
-            'containing spaces in block scalar' => array(
+    ],
+            'containing spaces in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVs bG8gd 29ybGQ=
 EOT
-    ),
-        );
+    ],
+        ];
     }
 
     /**
@@ -1368,44 +1368,44 @@ EOT
 
     public function getInvalidBinaryData()
     {
-        return array(
-            'length not a multiple of four' => array('data: !!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'),
-            'invalid characters' => array('!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'),
-            'too many equals characters' => array('data: !!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'),
-            'misplaced equals character' => array('data: !!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'),
-            'length not a multiple of four in block scalar' => array(
+        return [
+            'length not a multiple of four' => ['data: !!binary "SGVsbG8d29ybGQ="', '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/'],
+            'invalid characters' => ['!!binary "SGVsbG8#d29ybGQ="', '/The base64 encoded data \(.*\) contains invalid characters/'],
+            'too many equals characters' => ['data: !!binary "SGVsbG8gd29yb==="', '/The base64 encoded data \(.*\) contains invalid characters/'],
+            'misplaced equals character' => ['data: !!binary "SGVsbG8gd29ybG=Q"', '/The base64 encoded data \(.*\) contains invalid characters/'],
+            'length not a multiple of four in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVsbG8d29ybGQ=
 EOT
                 ,
                 '/The normalized base64 encoded data \(data without whitespace characters\) length must be a multiple of four \(\d+ bytes given\)/',
-            ),
-            'invalid characters in block scalar' => array(
+            ],
+            'invalid characters in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVsbG8#d29ybGQ=
 EOT
                 ,
                 '/The base64 encoded data \(.*\) contains invalid characters/',
-            ),
-            'too many equals characters in block scalar' => array(
+            ],
+            'too many equals characters in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVsbG8gd29yb===
 EOT
                 ,
                 '/The base64 encoded data \(.*\) contains invalid characters/',
-            ),
-            'misplaced equals character in block scalar' => array(
+            ],
+            'misplaced equals character in block scalar' => [
                 <<<'EOT'
 data: !!binary |
     SGVsbG8gd29ybG=Q
 EOT
                 ,
                 '/The base64 encoded data \(.*\) contains invalid characters/',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testParseDateAsMappingValue()
@@ -1418,7 +1418,7 @@ EOT;
         $expectedDate->setDate(2002, 12, 14);
         $expectedDate->setTime(0, 0, 0);
 
-        $this->assertEquals(array('date' => $expectedDate), $this->parser->parse($yaml, Yaml::PARSE_DATETIME));
+        $this->assertEquals(['date' => $expectedDate], $this->parser->parse($yaml, Yaml::PARSE_DATETIME));
     }
 
     /**
@@ -1440,8 +1440,8 @@ EOT;
 
     public function parserThrowsExceptionWithCorrectLineNumberProvider()
     {
-        return array(
-            array(
+        return [
+            [
                 4,
                 <<<'YAML'
 foo:
@@ -1449,8 +1449,8 @@ foo:
         # bar
         bar: "123",
 YAML
-            ),
-            array(
+            ],
+            [
                 5,
                 <<<'YAML'
 foo:
@@ -1459,8 +1459,8 @@ foo:
         # bar
         bar: "123",
 YAML
-            ),
-            array(
+            ],
+            [
                 8,
                 <<<'YAML'
 foo:
@@ -1472,8 +1472,8 @@ bar:
         # bar
         bar: "123",
 YAML
-            ),
-            array(
+            ],
+            [
                 10,
                 <<<'YAML'
 foo:
@@ -1487,8 +1487,8 @@ bar:
         # bar
         bar: "123",
 YAML
-            ),
-        );
+            ],
+        ];
     }
 
     public function testParseMultiLineQuotedString()
@@ -1501,7 +1501,7 @@ foo"
 bar: baz
 EOT;
 
-        $this->assertSame(array('foo' => 'bar baz foobar foo', 'bar' => 'baz'), $this->parser->parse($yaml));
+        $this->assertSame(['foo' => 'bar baz foobar foo', 'bar' => 'baz'], $this->parser->parse($yaml));
     }
 
     public function testMultiLineQuotedStringWithTrailingBackslash()
@@ -1512,7 +1512,7 @@ foobar:
     bar"
 YAML;
 
-        $this->assertSame(array('foobar' => 'foobar'), $this->parser->parse($yaml));
+        $this->assertSame(['foobar' => 'foobar'], $this->parser->parse($yaml));
     }
 
     public function testCommentCharactersInMultiLineQuotedStrings()
@@ -1523,12 +1523,12 @@ foo:
       #bar'
     bar: baz
 YAML;
-        $expected = array(
-            'foo' => array(
+        $expected = [
+            'foo' => [
                 'foobar' => 'foo #bar',
                 'bar' => 'baz',
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -1540,9 +1540,9 @@ foobar: 'foo
 
     bar'
 YAML;
-        $expected = array(
+        $expected = [
             'foobar' => "foo\nbar",
-        );
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -1557,7 +1557,7 @@ foo: bar
 bar: baz
 EOT;
 
-        $this->assertSame(array('foo' => 'bar baz foobar foo', 'bar' => 'baz'), $this->parser->parse($yaml));
+        $this->assertSame(['foo' => 'bar baz foobar foo', 'bar' => 'baz'], $this->parser->parse($yaml));
     }
 
     public function testParseMultiLineString()
@@ -1575,7 +1575,7 @@ EOT;
 
     public function multiLineDataProvider()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<'EOF'
 foo:
@@ -1585,15 +1585,15 @@ foo:
     two
     three
 EOF;
-        $expected = array(
-            'foo' => array(
-                array(
+        $expected = [
+            'foo' => [
+                [
                     'bar' => "one\ntwo three",
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
-        $tests[] = array($yaml, $expected, false);
+        $tests[] = [$yaml, $expected, false];
 
         $yaml = <<<'EOF'
 bar
@@ -1601,7 +1601,7 @@ bar
 EOF;
         $expected = 'bar "foo"';
 
-        $tests[] = array($yaml, $expected, false);
+        $tests[] = [$yaml, $expected, false];
 
         $yaml = <<<'EOF'
 bar
@@ -1609,7 +1609,7 @@ bar
 EOF;
         $expected = 'bar "foo';
 
-        $tests[] = array($yaml, $expected, false);
+        $tests[] = [$yaml, $expected, false];
 
         $yaml = <<<'EOF'
 bar
@@ -1618,7 +1618,7 @@ bar
 EOF;
         $expected = "bar\n'foo'";
 
-        $tests[] = array($yaml, $expected, false);
+        $tests[] = [$yaml, $expected, false];
 
         $yaml = <<<'EOF'
 bar
@@ -1627,14 +1627,14 @@ foo'
 EOF;
         $expected = "bar\nfoo'";
 
-        $tests[] = array($yaml, $expected, false);
+        $tests[] = [$yaml, $expected, false];
 
         return $tests;
     }
 
     public function testTaggedInlineMapping()
     {
-        $this->assertEquals(new TaggedValue('foo', array('foo' => 'bar')), $this->parser->parse('!foo {foo: bar}', Yaml::PARSE_CUSTOM_TAGS));
+        $this->assertEquals(new TaggedValue('foo', ['foo' => 'bar']), $this->parser->parse('!foo {foo: bar}', Yaml::PARSE_CUSTOM_TAGS));
     }
 
     /**
@@ -1647,48 +1647,48 @@ EOF;
 
     public function taggedValuesProvider()
     {
-        return array(
-            'scalars' => array(
-                array(
+        return [
+            'scalars' => [
+                [
                     'foo' => new TaggedValue('inline', 'bar'),
                     'quz' => new TaggedValue('long', 'this is a long text'),
-                ),
+                ],
                 <<<YAML
 foo: !inline bar
 quz: !long >
   this is a long
   text
 YAML
-            ),
-            'sequences' => array(
-                array(new TaggedValue('foo', array('yaml')), new TaggedValue('quz', array('bar'))),
+            ],
+            'sequences' => [
+                [new TaggedValue('foo', ['yaml']), new TaggedValue('quz', ['bar'])],
                 <<<YAML
 - !foo
     - yaml
 - !quz [bar]
 YAML
-            ),
-            'mappings' => array(
-                new TaggedValue('foo', array('foo' => new TaggedValue('quz', array('bar')), 'quz' => new TaggedValue('foo', array('quz' => 'bar')))),
+            ],
+            'mappings' => [
+                new TaggedValue('foo', ['foo' => new TaggedValue('quz', ['bar']), 'quz' => new TaggedValue('foo', ['quz' => 'bar'])]),
                 <<<YAML
 !foo
 foo: !quz [bar]
 quz: !foo
    quz: bar
 YAML
-            ),
-            'inline' => array(
-                array(new TaggedValue('foo', array('foo', 'bar')), new TaggedValue('quz', array('foo' => 'bar', 'quz' => new TaggedValue('bar', array('one' => 'bar'))))),
+            ],
+            'inline' => [
+                [new TaggedValue('foo', ['foo', 'bar']), new TaggedValue('quz', ['foo' => 'bar', 'quz' => new TaggedValue('bar', ['one' => 'bar'])])],
                 <<<YAML
 - !foo [foo, bar]
 - !quz {foo: bar, quz: !bar {one: bar}}
 YAML
-            ),
-            'spaces-around-tag-value-in-sequence' => array(
-                array(new TaggedValue('foo', 'bar')),
+            ],
+            'spaces-around-tag-value-in-sequence' => [
+                [new TaggedValue('foo', 'bar')],
                 '[ !foo bar ]',
-            ),
-        );
+            ],
+        ];
     }
 
     public function testNonSpecificTagSupport()
@@ -1797,7 +1797,7 @@ INI;
     {
         $parser = new Parser();
 
-        $tests = array();
+        $tests = [];
         $files = $parser->parseFile(__DIR__.'/Fixtures/'.$testsFile);
         foreach ($files as $file) {
             $yamls = file_get_contents(__DIR__.'/Fixtures/'.$file.'.yml');
@@ -1814,7 +1814,7 @@ INI;
                 } else {
                     eval('$expected = '.trim($test['php']).';');
 
-                    $tests[] = array(var_export($expected, true), $test['yaml'], $test['test']);
+                    $tests[] = [var_export($expected, true), $test['yaml'], $test['test']];
                 }
             }
         }
@@ -1825,7 +1825,7 @@ INI;
     public function testCanParseVeryLongValue()
     {
         $longStringWithSpaces = str_repeat('xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ', 20000);
-        $trickyVal = array('x' => $longStringWithSpaces);
+        $trickyVal = ['x' => $longStringWithSpaces];
 
         $yamlString = Yaml::dump($trickyVal);
         $arrayFromYaml = $this->parser->parse($yamlString);
@@ -1863,16 +1863,16 @@ transitions:
             - !php/const 'Symfony\Component\Yaml\Tests\B::BAR'
         to: !php/const 'Symfony\Component\Yaml\Tests\B::BAZ'
 YAML;
-        $expected = array(
-            'transitions' => array(
-                'foo' => array(
-                    'from' => array(
+        $expected = [
+            'transitions' => [
+                'foo' => [
+                    'from' => [
                         'bar',
-                    ),
+                    ],
                     'to' => 'baz',
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml, Yaml::PARSE_CONSTANT));
     }
@@ -1893,23 +1893,23 @@ foobar:
     bar: ~
     <<: [*FOO, *BAR]
 YAML;
-        $expected = (object) array(
-            'foo' => (object) array(
+        $expected = (object) [
+            'foo' => (object) [
                 'bar' => 1,
-            ),
-            'bar' => (object) array(
+            ],
+            'bar' => (object) [
                 'baz' => 2,
                 'bar' => 1,
-            ),
-            'baz' => (object) array(
+            ],
+            'baz' => (object) [
                 'baz_foo' => 3,
                 'baz_bar' => 4,
-            ),
-            'foobar' => (object) array(
+            ],
+            'foobar' => (object) [
                 'bar' => null,
                 'baz' => 2,
-            ),
-        );
+            ],
+        ];
 
         $this->assertEquals($expected, $this->parser->parse($yaml, Yaml::PARSE_OBJECT_FOR_MAP));
     }
@@ -1967,18 +1967,18 @@ mergekeyderef:
     d: quux
     <<: *quux
 YAML;
-        $expected = array(
-            'mergekeyrefdef' => array(
+        $expected = [
+            'mergekeyrefdef' => [
                 'a' => 'foo',
                 'b' => 'bar',
                 'c' => 'baz',
-            ),
-            'mergekeyderef' => array(
+            ],
+            'mergekeyderef' => [
                 'd' => 'quux',
                 'b' => 'bar',
                 'c' => 'baz',
-            ),
-        );
+            ],
+        ];
 
         $this->assertSame($expected, $this->parser->parse($yaml));
     }
@@ -1995,18 +1995,18 @@ mergekeyderef:
     d: quux
     <<: *quux
 YAML;
-        $expected = (object) array(
-            'mergekeyrefdef' => (object) array(
+        $expected = (object) [
+            'mergekeyrefdef' => (object) [
                 'a' => 'foo',
                 'b' => 'bar',
                 'c' => 'baz',
-            ),
-            'mergekeyderef' => (object) array(
+            ],
+            'mergekeyderef' => (object) [
                 'd' => 'quux',
                 'b' => 'bar',
                 'c' => 'baz',
-            ),
-        );
+            ],
+        ];
 
         $this->assertEquals($expected, $this->parser->parse($yaml, Yaml::PARSE_OBJECT_FOR_MAP));
     }
@@ -2035,7 +2035,7 @@ EOE;
 
     public function circularReferenceProvider()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<YAML
 foo:
@@ -2044,7 +2044,7 @@ foo:
         bar: foobar
         baz: *foo
 YAML;
-        $tests['sequence'] = array($yaml);
+        $tests['sequence'] = [$yaml];
 
         $yaml = <<<YAML
 foo: &foo
@@ -2052,7 +2052,7 @@ foo: &foo
         foobar: baz
         baz: *foo
 YAML;
-        $tests['mapping'] = array($yaml);
+        $tests['mapping'] = [$yaml];
 
         $yaml = <<<YAML
 foo: &foo
@@ -2060,7 +2060,7 @@ foo: &foo
         foobar: baz
         <<: *foo
 YAML;
-        $tests['mapping with merge key'] = array($yaml);
+        $tests['mapping with merge key'] = [$yaml];
 
         return $tests;
     }
@@ -2075,7 +2075,7 @@ YAML;
 
     public function indentedMappingData()
     {
-        $tests = array();
+        $tests = [];
 
         $yaml = <<<YAML
 foo:
@@ -2083,15 +2083,15 @@ foo:
     # A comment
     baz: "foobaz"
 YAML;
-        $expected = array(
-            'foo' => array(
-                array(
+        $expected = [
+            'foo' => [
+                [
                     'bar' => 'foobar',
                     'baz' => 'foobaz',
-                ),
-            ),
-        );
-        $tests['comment line is first line in indented block'] = array($yaml, $expected);
+                ],
+            ],
+        ];
+        $tests['comment line is first line in indented block'] = [$yaml, $expected];
 
         $yaml = <<<YAML
 foo:
@@ -2099,42 +2099,42 @@ foo:
         # comment
         baz: [1, 2, 3]
 YAML;
-        $expected = array(
-            'foo' => array(
-                array(
-                    'bar' => array(
-                        'baz' => array(1, 2, 3),
-                    ),
-                ),
-            ),
-        );
-        $tests['mapping value on new line starting with a comment line'] = array($yaml, $expected);
+        $expected = [
+            'foo' => [
+                [
+                    'bar' => [
+                        'baz' => [1, 2, 3],
+                    ],
+                ],
+            ],
+        ];
+        $tests['mapping value on new line starting with a comment line'] = [$yaml, $expected];
 
         $yaml = <<<YAML
 foo:
   -
     bar: foobar
 YAML;
-        $expected = array(
-            'foo' => array(
-                array(
+        $expected = [
+            'foo' => [
+                [
                     'bar' => 'foobar',
-                ),
-            ),
-        );
-        $tests['mapping in sequence starting on a new line'] = array($yaml, $expected);
+                ],
+            ],
+        ];
+        $tests['mapping in sequence starting on a new line'] = [$yaml, $expected];
 
         $yaml = <<<YAML
 foo:
 
     bar: baz
 YAML;
-        $expected = array(
-            'foo' => array(
+        $expected = [
+            'foo' => [
                 'bar' => 'baz',
-            ),
-        );
-        $tests['blank line at the beginning of an indented mapping value'] = array($yaml, $expected);
+            ],
+        ];
+        $tests['blank line at the beginning of an indented mapping value'] = [$yaml, $expected];
 
         return $tests;
     }
diff --git a/src/Symfony/Component/Yaml/Tests/YamlTest.php b/src/Symfony/Component/Yaml/Tests/YamlTest.php
index 3f6c2525f7..5a792c5116 100644
--- a/src/Symfony/Component/Yaml/Tests/YamlTest.php
+++ b/src/Symfony/Component/Yaml/Tests/YamlTest.php
@@ -18,7 +18,7 @@ class YamlTest extends TestCase
 {
     public function testParseAndDump()
     {
-        $data = array('lorem' => 'ipsum', 'dolor' => 'sit');
+        $data = ['lorem' => 'ipsum', 'dolor' => 'sit'];
         $yml = Yaml::dump($data);
         $parsed = Yaml::parse($yml);
         $this->assertEquals($data, $parsed);
@@ -30,7 +30,7 @@ class YamlTest extends TestCase
      */
     public function testZeroIndentationThrowsException()
     {
-        Yaml::dump(array('lorem' => 'ipsum', 'dolor' => 'sit'), 2, 0);
+        Yaml::dump(['lorem' => 'ipsum', 'dolor' => 'sit'], 2, 0);
     }
 
     /**
@@ -39,6 +39,6 @@ class YamlTest extends TestCase
      */
     public function testNegativeIndentationThrowsException()
     {
-        Yaml::dump(array('lorem' => 'ipsum', 'dolor' => 'sit'), 2, -4);
+        Yaml::dump(['lorem' => 'ipsum', 'dolor' => 'sit'], 2, -4);
     }
 }
diff --git a/src/Symfony/Contracts/Cache/CacheTrait.php b/src/Symfony/Contracts/Cache/CacheTrait.php
index d82d96530b..918d5559b7 100644
--- a/src/Symfony/Contracts/Cache/CacheTrait.php
+++ b/src/Symfony/Contracts/Cache/CacheTrait.php
@@ -46,7 +46,7 @@ trait CacheTrait
 
         $item = $pool->getItem($key);
         $recompute = !$item->isHit() || INF === $beta;
-        $metadata = $item instanceof ItemInterface ? $item->getMetadata() : array();
+        $metadata = $item instanceof ItemInterface ? $item->getMetadata() : [];
 
         if (!$recompute && $metadata) {
             $expiry = $metadata[ItemInterface::METADATA_EXPIRY] ?? false;
diff --git a/src/Symfony/Contracts/Service/ServiceLocatorTrait.php b/src/Symfony/Contracts/Service/ServiceLocatorTrait.php
index 8ffa2b4f10..eed44f5d33 100644
--- a/src/Symfony/Contracts/Service/ServiceLocatorTrait.php
+++ b/src/Symfony/Contracts/Service/ServiceLocatorTrait.php
@@ -23,7 +23,7 @@ use Psr\Container\NotFoundExceptionInterface;
 trait ServiceLocatorTrait
 {
     private $factories;
-    private $loading = array();
+    private $loading = [];
 
     /**
      * @param callable[] $factories
diff --git a/src/Symfony/Contracts/Service/ServiceSubscriberInterface.php b/src/Symfony/Contracts/Service/ServiceSubscriberInterface.php
index cffccadb54..8bb320f5b3 100644
--- a/src/Symfony/Contracts/Service/ServiceSubscriberInterface.php
+++ b/src/Symfony/Contracts/Service/ServiceSubscriberInterface.php
@@ -33,19 +33,19 @@ interface ServiceSubscriberInterface
      *
      * For mandatory dependencies:
      *
-     *  * array('logger' => 'Psr\Log\LoggerInterface') means the objects use the "logger" name
+     *  * ['logger' => 'Psr\Log\LoggerInterface'] means the objects use the "logger" name
      *    internally to fetch a service which must implement Psr\Log\LoggerInterface.
-     *  * array('loggers' => 'Psr\Log\LoggerInterface[]') means the objects use the "loggers" name
+     *  * ['loggers' => 'Psr\Log\LoggerInterface[]'] means the objects use the "loggers" name
      *    internally to fetch an iterable of Psr\Log\LoggerInterface instances.
-     *  * array('Psr\Log\LoggerInterface') is a shortcut for
-     *  * array('Psr\Log\LoggerInterface' => 'Psr\Log\LoggerInterface')
+     *  * ['Psr\Log\LoggerInterface'] is a shortcut for
+     *  * ['Psr\Log\LoggerInterface' => 'Psr\Log\LoggerInterface']
      *
      * otherwise:
      *
-     *  * array('logger' => '?Psr\Log\LoggerInterface') denotes an optional dependency
-     *  * array('loggers' => '?Psr\Log\LoggerInterface[]') denotes an optional iterable dependency
-     *  * array('?Psr\Log\LoggerInterface') is a shortcut for
-     *  * array('Psr\Log\LoggerInterface' => '?Psr\Log\LoggerInterface')
+     *  * ['logger' => '?Psr\Log\LoggerInterface'] denotes an optional dependency
+     *  * ['loggers' => '?Psr\Log\LoggerInterface[]'] denotes an optional iterable dependency
+     *  * ['?Psr\Log\LoggerInterface'] is a shortcut for
+     *  * ['Psr\Log\LoggerInterface' => '?Psr\Log\LoggerInterface']
      *
      * @return array The required service types, optionally keyed by service names
      */
diff --git a/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php b/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
index 457ffb26b7..ceaef6fa14 100644
--- a/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
+++ b/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php
@@ -32,7 +32,7 @@ trait ServiceSubscriberTrait
             return $services;
         }
 
-        $services = \is_callable(array('parent', __FUNCTION__)) ? parent::getSubscribedServices() : array();
+        $services = \is_callable(['parent', __FUNCTION__]) ? parent::getSubscribedServices() : [];
 
         foreach ((new \ReflectionClass(self::class))->getMethods() as $method) {
             if ($method->isStatic() || $method->isAbstract() || $method->isGenerator() || $method->isInternal() || $method->getNumberOfRequiredParameters()) {
@@ -54,7 +54,7 @@ trait ServiceSubscriberTrait
     {
         $this->container = $container;
 
-        if (\is_callable(array('parent', __FUNCTION__))) {
+        if (\is_callable(['parent', __FUNCTION__])) {
             return parent::setContainer($container);
         }
     }
diff --git a/src/Symfony/Contracts/Tests/Cache/CacheTraitTest.php b/src/Symfony/Contracts/Tests/Cache/CacheTraitTest.php
index 5134a9339f..f77d103c93 100644
--- a/src/Symfony/Contracts/Tests/Cache/CacheTraitTest.php
+++ b/src/Symfony/Contracts/Tests/Cache/CacheTraitTest.php
@@ -34,7 +34,7 @@ class CacheTraitTest extends TestCase
             ->with('computed data');
 
         $cache = $this->getMockBuilder(TestPool::class)
-            ->setMethods(array('getItem', 'save'))
+            ->setMethods(['getItem', 'save'])
             ->getMock();
         $cache->expects($this->once())
             ->method('getItem')
@@ -60,7 +60,7 @@ class CacheTraitTest extends TestCase
             ->method('set');
 
         $cache = $this->getMockBuilder(TestPool::class)
-            ->setMethods(array('getItem', 'save'))
+            ->setMethods(['getItem', 'save'])
             ->getMock();
 
         $cache->expects($this->once())
@@ -91,7 +91,7 @@ class CacheTraitTest extends TestCase
             ->with('computed data');
 
         $cache = $this->getMockBuilder(TestPool::class)
-            ->setMethods(array('getItem', 'save'))
+            ->setMethods(['getItem', 'save'])
             ->getMock();
 
         $cache->expects($this->once())
@@ -111,7 +111,7 @@ class CacheTraitTest extends TestCase
     public function testExceptionOnNegativeBeta()
     {
         $cache = $this->getMockBuilder(TestPool::class)
-            ->setMethods(array('getItem', 'save'))
+            ->setMethods(['getItem', 'save'])
             ->getMock();
 
         $callback = function (CacheItemInterface $item) {
@@ -135,7 +135,7 @@ class TestPool implements CacheItemPoolInterface
     {
     }
 
-    public function deleteItems(array $keys = array())
+    public function deleteItems(array $keys = [])
     {
     }
 
@@ -143,7 +143,7 @@ class TestPool implements CacheItemPoolInterface
     {
     }
 
-    public function getItems(array $key = array())
+    public function getItems(array $key = [])
     {
     }
 
diff --git a/src/Symfony/Contracts/Tests/Service/ServiceLocatorTest.php b/src/Symfony/Contracts/Tests/Service/ServiceLocatorTest.php
index 265af909df..22487a8992 100644
--- a/src/Symfony/Contracts/Tests/Service/ServiceLocatorTest.php
+++ b/src/Symfony/Contracts/Tests/Service/ServiceLocatorTest.php
@@ -26,11 +26,11 @@ class ServiceLocatorTest extends TestCase
 
     public function testHas()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () { return 'bar'; },
             'bar' => function () { return 'baz'; },
             function () { return 'dummy'; },
-        ));
+        ]);
 
         $this->assertTrue($locator->has('foo'));
         $this->assertTrue($locator->has('bar'));
@@ -39,10 +39,10 @@ class ServiceLocatorTest extends TestCase
 
     public function testGet()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () { return 'bar'; },
             'bar' => function () { return 'baz'; },
-        ));
+        ]);
 
         $this->assertSame('bar', $locator->get('foo'));
         $this->assertSame('baz', $locator->get('bar'));
@@ -51,13 +51,13 @@ class ServiceLocatorTest extends TestCase
     public function testGetDoesNotMemoize()
     {
         $i = 0;
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () use (&$i) {
                 ++$i;
 
                 return 'bar';
             },
-        ));
+        ]);
 
         $this->assertSame('bar', $locator->get('foo'));
         $this->assertSame('bar', $locator->get('foo'));
@@ -70,9 +70,9 @@ class ServiceLocatorTest extends TestCase
      */
     public function testThrowsOnUndefinedInternalService()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () use (&$locator) { return $locator->get('bar'); },
-        ));
+        ]);
 
         $locator->get('foo');
     }
@@ -83,11 +83,11 @@ class ServiceLocatorTest extends TestCase
      */
     public function testThrowsOnCircularReference()
     {
-        $locator = $this->getServiceLocator(array(
+        $locator = $this->getServiceLocator([
             'foo' => function () use (&$locator) { return $locator->get('bar'); },
             'bar' => function () use (&$locator) { return $locator->get('baz'); },
             'baz' => function () use (&$locator) { return $locator->get('bar'); },
-        ));
+        ]);
 
         $locator->get('foo');
     }
diff --git a/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php b/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
index c7742c65d4..344bba8772 100644
--- a/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
+++ b/src/Symfony/Contracts/Tests/Service/ServiceSubscriberTraitTest.php
@@ -21,14 +21,14 @@ class ServiceSubscriberTraitTest extends TestCase
 {
     public function testMethodsOnParentsAndChildrenAreIgnoredInGetSubscribedServices()
     {
-        $expected = array(TestService::class.'::aService' => '?Symfony\Contracts\Tests\Service\Service2');
+        $expected = [TestService::class.'::aService' => '?Symfony\Contracts\Tests\Service\Service2'];
 
         $this->assertEquals($expected, ChildTestService::getSubscribedServices());
     }
 
     public function testSetContainerIsCalledOnParent()
     {
-        $container = new class(array()) implements ContainerInterface {
+        $container = new class([]) implements ContainerInterface {
             use ServiceLocatorTrait;
         };
 
diff --git a/src/Symfony/Contracts/Tests/Translation/TranslatorTest.php b/src/Symfony/Contracts/Tests/Translation/TranslatorTest.php
index a3b67dfe5e..ac5f9c7aeb 100644
--- a/src/Symfony/Contracts/Tests/Translation/TranslatorTest.php
+++ b/src/Symfony/Contracts/Tests/Translation/TranslatorTest.php
@@ -55,7 +55,7 @@ class TranslatorTest extends TestCase
         $translator = $this->getTranslator();
         $translator->setLocale('en');
 
-        $this->assertEquals($expected, $translator->trans($id, array('%count%' => $number)));
+        $this->assertEquals($expected, $translator->trans($id, ['%count%' => $number]));
     }
 
     /**
@@ -67,7 +67,7 @@ class TranslatorTest extends TestCase
 
         $translator = $this->getTranslator();
 
-        $this->assertEquals($expected, $translator->trans($id, array('%count%' => $number)));
+        $this->assertEquals($expected, $translator->trans($id, ['%count%' => $number]));
     }
 
     public function testGetSetLocale()
@@ -94,24 +94,24 @@ class TranslatorTest extends TestCase
 
     public function getTransTests()
     {
-        return array(
-            array('Symfony is great!', 'Symfony is great!', array()),
-            array('Symfony is awesome!', 'Symfony is %what%!', array('%what%' => 'awesome')),
-        );
+        return [
+            ['Symfony is great!', 'Symfony is great!', []],
+            ['Symfony is awesome!', 'Symfony is %what%!', ['%what%' => 'awesome']],
+        ];
     }
 
     public function getTransChoiceTests()
     {
-        return array(
-            array('There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1),
-            array('There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10),
-            array('There are 0 apples', 'There is 1 apple|There are %count% apples', 0),
-            array('There is 1 apple', 'There is 1 apple|There are %count% apples', 1),
-            array('There are 10 apples', 'There is 1 apple|There are %count% apples', 10),
+        return [
+            ['There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1],
+            ['There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10],
+            ['There are 0 apples', 'There is 1 apple|There are %count% apples', 0],
+            ['There is 1 apple', 'There is 1 apple|There are %count% apples', 1],
+            ['There are 10 apples', 'There is 1 apple|There are %count% apples', 10],
             // custom validation messages may be coded with a fixed value
-            array('There are 2 apples', 'There are 2 apples', 2),
-        );
+            ['There are 2 apples', 'There are 2 apples', 2],
+        ];
     }
 
     /**
@@ -121,22 +121,22 @@ class TranslatorTest extends TestCase
     {
         $translator = $this->getTranslator();
 
-        $this->assertEquals($expected, $translator->trans($interval.' foo|[1,Inf[ bar', array('%count%' => $number)));
+        $this->assertEquals($expected, $translator->trans($interval.' foo|[1,Inf[ bar', ['%count%' => $number]));
     }
 
     public function getInternal()
     {
-        return array(
-            array('foo', 3, '{1,2, 3 ,4}'),
-            array('bar', 10, '{1,2, 3 ,4}'),
-            array('bar', 3, '[1,2]'),
-            array('foo', 1, '[1,2]'),
-            array('foo', 2, '[1,2]'),
-            array('bar', 1, ']1,2['),
-            array('bar', 2, ']1,2['),
-            array('foo', log(0), '[-Inf,2['),
-            array('foo', -log(0), '[-2,+Inf]'),
-        );
+        return [
+            ['foo', 3, '{1,2, 3 ,4}'],
+            ['bar', 10, '{1,2, 3 ,4}'],
+            ['bar', 3, '[1,2]'],
+            ['foo', 1, '[1,2]'],
+            ['foo', 2, '[1,2]'],
+            ['bar', 1, ']1,2['],
+            ['bar', 2, ']1,2['],
+            ['foo', log(0), '[-Inf,2['],
+            ['foo', -log(0), '[-2,+Inf]'],
+        ];
     }
 
     /**
@@ -146,14 +146,14 @@ class TranslatorTest extends TestCase
     {
         $translator = $this->getTranslator();
 
-        $this->assertEquals($expected, $translator->trans($id, array('%count%' => $number)));
+        $this->assertEquals($expected, $translator->trans($id, ['%count%' => $number]));
     }
 
     public function testReturnMessageIfExactlyOneStandardRuleIsGiven()
     {
         $translator = $this->getTranslator();
 
-        $this->assertEquals('There are two apples', $translator->trans('There are two apples', array('%count%' => 2)));
+        $this->assertEquals('There are two apples', $translator->trans('There are two apples', ['%count%' => 2]));
     }
 
     /**
@@ -164,98 +164,98 @@ class TranslatorTest extends TestCase
     {
         $translator = $this->getTranslator();
 
-        $translator->trans($id, array('%count%' => $number));
+        $translator->trans($id, ['%count%' => $number]);
     }
 
     public function getNonMatchingMessages()
     {
-        return array(
-            array('{0} There are no apples|{1} There is one apple', 2),
-            array('{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('{1} There is one apple|]2,Inf] There are %count% apples', 2),
-            array('{0} There are no apples|There is one apple', 2),
-        );
+        return [
+            ['{0} There are no apples|{1} There is one apple', 2],
+            ['{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['{1} There is one apple|]2,Inf] There are %count% apples', 2],
+            ['{0} There are no apples|There is one apple', 2],
+        ];
     }
 
     public function getChooseTests()
     {
-        return array(
-            array('There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('There are no apples', '{0}     There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('There are no apples', '{0}There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0),
+        return [
+            ['There are no apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['There are no apples', '{0}     There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['There are no apples', '{0}There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 0],
 
-            array('There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1),
+            ['There is one apple', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 1],
 
-            array('There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10),
-            array('There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf]There are %count% apples', 10),
-            array('There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf]     There are %count% apples', 10),
+            ['There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf] There are %count% apples', 10],
+            ['There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf]There are %count% apples', 10],
+            ['There are 10 apples', '{0} There are no apples|{1} There is one apple|]1,Inf]     There are %count% apples', 10],
 
-            array('There are 0 apples', 'There is one apple|There are %count% apples', 0),
-            array('There is one apple', 'There is one apple|There are %count% apples', 1),
-            array('There are 10 apples', 'There is one apple|There are %count% apples', 10),
+            ['There are 0 apples', 'There is one apple|There are %count% apples', 0],
+            ['There is one apple', 'There is one apple|There are %count% apples', 1],
+            ['There are 10 apples', 'There is one apple|There are %count% apples', 10],
 
-            array('There are 0 apples', 'one: There is one apple|more: There are %count% apples', 0),
-            array('There is one apple', 'one: There is one apple|more: There are %count% apples', 1),
-            array('There are 10 apples', 'one: There is one apple|more: There are %count% apples', 10),
+            ['There are 0 apples', 'one: There is one apple|more: There are %count% apples', 0],
+            ['There is one apple', 'one: There is one apple|more: There are %count% apples', 1],
+            ['There are 10 apples', 'one: There is one apple|more: There are %count% apples', 10],
 
-            array('There are no apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 0),
-            array('There is one apple', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 1),
-            array('There are 10 apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 10),
+            ['There are no apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 0],
+            ['There is one apple', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 1],
+            ['There are 10 apples', '{0} There are no apples|one: There is one apple|more: There are %count% apples', 10],
 
-            array('', '{0}|{1} There is one apple|]1,Inf] There are %count% apples', 0),
-            array('', '{0} There are no apples|{1}|]1,Inf] There are %count% apples', 1),
+            ['', '{0}|{1} There is one apple|]1,Inf] There are %count% apples', 0],
+            ['', '{0} There are no apples|{1}|]1,Inf] There are %count% apples', 1],
 
             // Indexed only tests which are Gettext PoFile* compatible strings.
-            array('There are 0 apples', 'There is one apple|There are %count% apples', 0),
-            array('There is one apple', 'There is one apple|There are %count% apples', 1),
-            array('There are 2 apples', 'There is one apple|There are %count% apples', 2),
+            ['There are 0 apples', 'There is one apple|There are %count% apples', 0],
+            ['There is one apple', 'There is one apple|There are %count% apples', 1],
+            ['There are 2 apples', 'There is one apple|There are %count% apples', 2],
 
             // Tests for float numbers
-            array('There is almost one apple', '{0} There are no apples|]0,1[ There is almost one apple|{1} There is one apple|[1,Inf] There is more than one apple', 0.7),
-            array('There is one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1),
-            array('There is more than one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1.7),
-            array('There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0),
-            array('There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0.0),
-            array('There are no apples', '{0.0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0),
+            ['There is almost one apple', '{0} There are no apples|]0,1[ There is almost one apple|{1} There is one apple|[1,Inf] There is more than one apple', 0.7],
+            ['There is one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1],
+            ['There is more than one apple', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 1.7],
+            ['There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0],
+            ['There are no apples', '{0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0.0],
+            ['There are no apples', '{0.0} There are no apples|]0,1[There are %count% apples|{1} There is one apple|[1,Inf] There is more than one apple', 0],
 
             // Test texts with new-lines
             // with double-quotes and \n in id & double-quotes and actual newlines in text
-            array("This is a text with a\n            new-line in it. Selector = 0.", '{0}This is a text with a
+            ["This is a text with a\n            new-line in it. Selector = 0.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 0),
+            new-line in it. Selector > 1.', 0],
             // with double-quotes and \n in id and single-quotes and actual newlines in text
-            array("This is a text with a\n            new-line in it. Selector = 1.", '{0}This is a text with a
+            ["This is a text with a\n            new-line in it. Selector = 1.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 1),
-            array("This is a text with a\n            new-line in it. Selector > 1.", '{0}This is a text with a
+            new-line in it. Selector > 1.', 1],
+            ["This is a text with a\n            new-line in it. Selector > 1.", '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 5),
+            new-line in it. Selector > 1.', 5],
             // with double-quotes and id split accros lines
-            array('This is a text with a
+            ['This is a text with a
             new-line in it. Selector = 1.', '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 1),
+            new-line in it. Selector > 1.', 1],
             // with single-quotes and id split accros lines
-            array('This is a text with a
+            ['This is a text with a
             new-line in it. Selector > 1.', '{0}This is a text with a
             new-line in it. Selector = 0.|{1}This is a text with a
             new-line in it. Selector = 1.|[1,Inf]This is a text with a
-            new-line in it. Selector > 1.', 5),
+            new-line in it. Selector > 1.', 5],
             // with single-quotes and \n in text
-            array('This is a text with a\nnew-line in it. Selector = 0.', '{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.', 0),
+            ['This is a text with a\nnew-line in it. Selector = 0.', '{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.', 0],
             // with double-quotes and id split accros lines
-            array("This is a text with a\nnew-line in it. Selector = 1.", "{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.", 1),
+            ["This is a text with a\nnew-line in it. Selector = 1.", "{0}This is a text with a\nnew-line in it. Selector = 0.|{1}This is a text with a\nnew-line in it. Selector = 1.|[1,Inf]This is a text with a\nnew-line in it. Selector > 1.", 1],
             // esacape pipe
-            array('This is a text with | in it. Selector = 0.', '{0}This is a text with || in it. Selector = 0.|{1}This is a text with || in it. Selector = 1.', 0),
+            ['This is a text with | in it. Selector = 0.', '{0}This is a text with || in it. Selector = 0.|{1}This is a text with || in it. Selector = 1.', 0],
             // Empty plural set (2 plural forms) from a .PO file
-            array('', '|', 1),
+            ['', '|', 1],
             // Empty plural set (3 plural forms) from a .PO file
-            array('', '||', 1),
-        );
+            ['', '||', 1],
+        ];
     }
 
     /**
@@ -285,13 +285,13 @@ class TranslatorTest extends TestCase
      */
     public function successLangcodes()
     {
-        return array(
-            array('1', array('ay', 'bo', 'cgg', 'dz', 'id', 'ja', 'jbo', 'ka', 'kk', 'km', 'ko', 'ky')),
-            array('2', array('nl', 'fr', 'en', 'de', 'de_GE', 'hy', 'hy_AM')),
-            array('3', array('be', 'bs', 'cs', 'hr')),
-            array('4', array('cy', 'mt', 'sl')),
-            array('6', array('ar')),
-        );
+        return [
+            ['1', ['ay', 'bo', 'cgg', 'dz', 'id', 'ja', 'jbo', 'ka', 'kk', 'km', 'ko', 'ky']],
+            ['2', ['nl', 'fr', 'en', 'de', 'de_GE', 'hy', 'hy_AM']],
+            ['3', ['be', 'bs', 'cs', 'hr']],
+            ['4', ['cy', 'mt', 'sl']],
+            ['6', ['ar']],
+        ];
     }
 
     /**
@@ -304,13 +304,13 @@ class TranslatorTest extends TestCase
      */
     public function failingLangcodes()
     {
-        return array(
-            array('1', array('fa')),
-            array('2', array('jbo')),
-            array('3', array('cbs')),
-            array('4', array('gd', 'kw')),
-            array('5', array('ga')),
-        );
+        return [
+            ['1', ['fa']],
+            ['2', ['jbo']],
+            ['3', ['cbs']],
+            ['4', ['gd', 'kw']],
+            ['5', ['ga']],
+        ];
     }
 
     /**
@@ -340,7 +340,7 @@ class TranslatorTest extends TestCase
             }
         };
 
-        $matrix = array();
+        $matrix = [];
         foreach ($langCodes as $langCode) {
             for ($count = 0; $count < 200; ++$count) {
                 $plural = $translator->getPluralizationRule($count, $langCode);
diff --git a/src/Symfony/Contracts/Translation/TranslatorInterface.php b/src/Symfony/Contracts/Translation/TranslatorInterface.php
index 2bdc415cbd..d867637370 100644
--- a/src/Symfony/Contracts/Translation/TranslatorInterface.php
+++ b/src/Symfony/Contracts/Translation/TranslatorInterface.php
@@ -61,5 +61,5 @@ interface TranslatorInterface
      *
      * @throws \InvalidArgumentException If the locale contains invalid characters
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null);
+    public function trans($id, array $parameters = [], $domain = null, $locale = null);
 }
diff --git a/src/Symfony/Contracts/Translation/TranslatorTrait.php b/src/Symfony/Contracts/Translation/TranslatorTrait.php
index 4e53fbd42c..c1021923c8 100644
--- a/src/Symfony/Contracts/Translation/TranslatorTrait.php
+++ b/src/Symfony/Contracts/Translation/TranslatorTrait.php
@@ -41,7 +41,7 @@ trait TranslatorTrait
     /**
      * {@inheritdoc}
      */
-    public function trans($id, array $parameters = array(), $domain = null, $locale = null)
+    public function trans($id, array $parameters = [], $domain = null, $locale = null)
     {
         $id = (string) $id;
 
@@ -52,7 +52,7 @@ trait TranslatorTrait
         $number = (float) $parameters['%count%'];
         $locale = (string) $locale ?: $this->getLocale();
 
-        $parts = array();
+        $parts = [];
         if (preg_match('/^\|++$/', $id)) {
             $parts = explode('|', $id);
         } elseif (preg_match_all('/(?:\|\||[^\|])++/', $id, $matches)) {
@@ -77,7 +77,7 @@ trait TranslatorTrait
 )\s*(?P<message>.*?)$/xs
 EOF;
 
-        $standardRules = array();
+        $standardRules = [];
         foreach ($parts as $part) {
             $part = trim(str_replace('||', '|', $part));