bug #19848 Revert "minor #19689 [DI] Cleanup array_key_exists (ro0NL)" (nicolas-grekas)

This PR was merged into the 2.7 branch.

Discussion
----------

Revert "minor #19689 [DI] Cleanup array_key_exists (ro0NL)"

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| Tests pass?   | yes
| Fixed tickets | #19689 #19840 #19825 #19857
| License       | MIT
| Doc PR        | -

This reverts commit c89f80a9cd, reversing
changes made to 386e5e78b4.

See discussion in #19847

I'll try adding test cases soon that ensure that:

- [x] *when not leaving scope* synthetic services always throw and ignore the `ContainerInterface::NULL_ON_INVALID_REFERENCE` flag (on 3.x also)
- [x] *when leaving scope* synthetic services always return null and ignore the `ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE`  (until 2.8 since scopes are gone in 3.x)

Commits
-------

8cb28bf [DI] Add anti-regression test
ac742df Revert "minor #19689 [DI] Cleanup array_key_exists (ro0NL)"

src/Symfony/Component/DependencyInjection/Container.php

@@ -223,6 +223,7 @@ class Container implements IntrospectableContainerInterface
             if ('service_container' === $id
                 || isset($this->aliases[$id])
                 || isset($this->services[$id])
+                || array_key_exists($id, $this->services)
             ) {
                 return true;
             }
@@ -265,7 +266,7 @@ class Container implements IntrospectableContainerInterface
                 $id = $this->aliases[$id];
             }
             // Re-use shared service instance if it exists.
-            if (isset($this->services[$id])) {
+            if (isset($this->services[$id]) || array_key_exists($id, $this->services)) {
                 return $this->services[$id];
             }
 
@@ -347,7 +348,7 @@ class Container implements IntrospectableContainerInterface
             $id = $this->aliases[$id];
         }
 
-        return isset($this->services[$id]);
+        return isset($this->services[$id]) || array_key_exists($id, $this->services);
     }
 
     /**

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -436,7 +436,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             return $service;
         }
 
-        if (!isset($this->definitions[$id]) && isset($this->aliasDefinitions[$id])) {
+        if (!array_key_exists($id, $this->definitions) && isset($this->aliasDefinitions[$id])) {
             return $this->get($this->aliasDefinitions[$id]);
         }
 
@@ -784,7 +784,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      */
     public function hasDefinition($id)
     {
-        return isset($this->definitions[strtolower($id)]);
+        return array_key_exists(strtolower($id), $this->definitions);
     }
 
     /**
@@ -800,7 +800,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     {
         $id = strtolower($id);
 
-        if (!isset($this->definitions[$id])) {
+        if (!array_key_exists($id, $this->definitions)) {
             throw new ServiceNotFoundException($id);
         }
 

src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php

@@ -256,6 +256,18 @@ class ContainerTest extends \PHPUnit_Framework_TestCase
         $this->assertNull($sc->get('inactive', ContainerInterface::NULL_ON_INVALID_REFERENCE));
     }
 
+    /**
+     * @expectedException \Symfony\Component\DependencyInjection\Exception\RuntimeException
+     * @expectedExcepionMessage You have requested a synthetic service ("request"). The DIC does not know how to construct this service.
+     */
+    public function testGetSyntheticServiceAlwaysThrows()
+    {
+        require_once __DIR__.'/Fixtures/php/services9.php';
+
+        $container = new \ProjectServiceContainer();
+        $container->get('request', ContainerInterface::NULL_ON_INVALID_REFERENCE);
+    }
+
     public function testHas()
     {
         $sc = new ProjectServiceContainer();
@@ -287,14 +299,17 @@ class ContainerTest extends \PHPUnit_Framework_TestCase
         $container->addScope(new Scope('foo'));
 
         $container->enterScope('foo');
+        $container->set('foo', new \stdClass(), 'foo');
         $scoped1 = $container->get('scoped');
         $scopedFoo1 = $container->get('scoped_foo');
 
         $container->enterScope('foo');
+        $container->set('foo', new \stdClass(), 'foo');
         $scoped2 = $container->get('scoped');
         $scoped3 = $container->get('SCOPED');
         $scopedFoo2 = $container->get('scoped_foo');
 
+        $container->set('foo', null, 'foo');
         $container->leaveScope('foo');
         $scoped4 = $container->get('scoped');
         $scopedFoo3 = $container->get('scoped_foo');
@@ -641,6 +656,12 @@ class ProjectServiceContainer extends Container
         return $this->services['scoped_bar'] = $this->scopedServices['foo']['scoped_bar'] = new \stdClass();
     }
 
+    protected function synchronizeFooService()
+    {
+        // Typically get the service to pass it to a setter
+        $this->get('foo');
+    }
+
     protected function synchronizeScopedSynchronizedFooService()
     {
         $this->synchronized = true;