symfony/UPGRADE-3.4.md

UPGRADE FROM 3.3 to 3.4

DependencyInjection

• Relying on service auto-registration while autowiring is deprecated and won't be supported in Symfony 4.0. Explicitly inject your dependencies or create services whose ids are their fully-qualified class name.

  Before:

  namespace App\Controller;
  
  use App\Mailer;
  
  class DefaultController
  {
      public function __construct(Mailer $mailer) {
          // ...
      }
  
      // ...
  }
  

  services:
      App\Controller\DefaultController:
          autowire: true
  

  After:

  // same PHP code
  

  services:
      App\Controller\DefaultController:
          autowire: true
  
      # or
      # App\Controller\DefaultController:
      #     arguments: { $mailer: "@App\Mailer" }
  
      App\Mailer:
          autowire: true
  

• Top-level anonymous services in XML are deprecated and will throw an exception in Symfony 4.0.

Debug

• Support for stacked errors in the ErrorHandler is deprecated and will be removed in Symfony 4.0.

Filesystem

• The Symfony\Component\Filesystem\LockHandler class has been deprecated, use the Symfony\Component\Lock\Store\FlockStore class or the Symfony\Component\Lock\Store\FlockStore\SemaphoreStore class directly instead.

Finder

• The Symfony\Component\Finder\Iterator\FilterIterator class has been deprecated and will be removed in 4.0 as it used to fix a bug which existed before version 5.5.23/5.6.7.

FrameworkBundle

• The doctrine/cache dependency has been removed; require it via composer require doctrine/cache if you are using Doctrine cache in your project.

• The validator.mapping.cache.doctrine.apc service has been deprecated.

• The symfony/stopwatch dependency has been removed, require it via composer require symfony/stopwatch in your dev environment.

• Using the KERNEL_DIR environment variable or the automatic guessing based on the phpunit.xml / phpunit.xml.dist file location is deprecated since 3.4. Set the KERNEL_CLASS environment variable to the fully-qualified class name of your Kernel instead. Not setting the KERNEL_CLASS environment variable will throw an exception on 4.0 unless you override the KernelTestCase::createKernel() or KernelTestCase::getKernelClass() method.

• The KernelTestCase::getPhpUnitXmlDir() and KernelTestCase::getPhpUnitCliConfigArgument() methods are deprecated since 3.4 and will be removed in 4.0.

• The --no-prefix option of the translation:update command is deprecated and will be removed in 4.0. Use the --prefix option with an empty string as value instead (e.g. --prefix="")

• The Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddCacheClearerPass class has been deprecated and will be removed in 4.0. Use the Symfony\Component\HttpKernel\DependencyInjection\AddCacheClearerPass class instead.

• The Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\AddCacheWarmerPass class has been deprecated and will be removed in 4.0. Use the Symfony\Component\HttpKernel\DependencyInjection\AddCacheWarmerPass class instead.

• The Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TranslationDumperPass class has been deprecated and will be removed in 4.0. Use the Symfony\Component\Translation\DependencyInjection\TranslationDumperPass class instead.

• The Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TranslationExtractorPass class has been deprecated and will be removed in 4.0. Use the Symfony\Component\Translation\DependencyInjection\TranslationExtractorPass class instead.

• The Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler\TranslatorPass class has been deprecated and will be removed in 4.0. Use the Symfony\Component\Translation\DependencyInjection\TranslatorPass class instead.

HttpKernel

• Relying on convention-based commands discovery has been deprecated and won't be supported in 4.0. Use PSR-4 based service discovery instead.

  Before:

  # app/config/services.yml
  services:
      # ...
  
      # implicit registration of all commands in the `Command` folder
  

  After:

  # app/config/services.yml
  services:
      # ...
  
      # explicit commands registration
      AppBundle\Command:
          resource: '../../src/AppBundle/Command/*'
          tags: ['console.command']
  

Process

• The Symfony\Component\Process\ProcessBuilder class has been deprecated, use the Symfony\Component\Process\Process class directly instead.

SecurityBundle

• Using voters that do not implement the VoterInterfaceis now deprecated in the AccessDecisionManager and this functionality will be removed in 4.0.

• FirewallContext::getListeners() now returns \Traversable|array

TwigBridge

• deprecated the Symfony\Bridge\Twig\Form\TwigRenderer class, use the FormRenderer class from the Form component instead

• deprecated Symfony\Bridge\Twig\Command\DebugCommand::set/getTwigEnvironment and the ability to pass a command name as first argument

• deprecated Symfony\Bridge\Twig\Command\LintCommand::set/getTwigEnvironment and the ability to pass a command name as first argument

TwigBundle

• deprecated the Symfony\Bundle\TwigBundle\Command\DebugCommand class, use the DebugCommand class from the Twig bridge instead

• deprecated relying on the ContainerAwareInterface implementation for Symfony\Bundle\TwigBundle\Command\LintCommand

Validator

• Not setting the strict option of the Choice constraint to true is deprecated and will throw an exception in Symfony 4.0.

Yaml

• using the !php/object: tag is deprecated and won't be supported in 4.0. Use the !php/object tag (without the colon) instead.

• using the !php/const: tag is deprecated and won't be supported in 4.0. Use the !php/const tag (without the colon) instead.

  Before:

  !php/const:PHP_INT_MAX
  

  After:

  !php/const PHP_INT_MAX
  

• Support for the !str tag is deprecated, use the !!str tag instead.

• Using the non-specific tag ! is deprecated and will have a different behavior in 4.0. Use a plain integer or !!float instead.

• Using the Yaml::PARSE_KEYS_AS_STRINGS flag is deprecated as it will be removed in 4.0.

  Before:

  $yaml = <<<YAML
  null: null key
  true: boolean true
  2.0: float key
  YAML;
  
  Yaml::parse($yaml, Yaml::PARSE_KEYS_AS_STRINGS);
  

  After:

  $yaml = <<<YAML
  "null": null key
  "true": boolean true
  "2.0": float key
  YAML;
  
  Yaml::parse($yaml);