[DependencyInjection] Add exception for service name not dumpable in PHP

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -436,7 +436,6 @@ class PhpDumper extends Dumper
      */
     private function addService($id, $definition)
     {
-        $name = Container::camelize($id);
         $this->definitionVariables = new \SplObjectStorage();
         $this->referenceVariables = array();
         $this->variableCount = 0;
@@ -479,7 +478,7 @@ EOF;
      *
      * $return
      */
-    protected function get{$name}Service()
+    protected function {$this->getMethodName($id)}()
     {
 
 EOF;
@@ -527,7 +526,6 @@ EOF;
      */
     private function addServiceAlias($alias, $id)
     {
-        $name = Container::camelize($alias);
         $type = 'Object';
 
         if ($this->container->hasDefinition($id)) {
@@ -542,7 +540,7 @@ EOF;
      *
      * @return $type An instance of the $id service
      */
-    protected function get{$name}Service()
+    protected function {$this->getMethodName($alias)}()
     {
         return {$this->getServiceCall($id)};
     }
@@ -550,6 +548,26 @@ EOF;
 EOF;
     }
 
+    /**
+     * Convert a service id to a valid PHP method name.
+     *
+     * @param string $id
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException
+     */
+    private function getMethodName($id)
+    {
+        $name = Container::camelize($id);
+
+        if (!preg_match('/^[a-zA-Z0-9_\x7f-\xff]+$/', $name)) {
+            throw new InvalidArgumentException(sprintf('Service id "%s" cannot be converted to a valid PHP method name.', $id));
+        }
+
+        return 'get'.$name.'Service';
+    }
+
     /**
      * Adds multiple services
      *

src/Symfony/Component/DependencyInjection/Tests/Dumper/PhpDumperTest.php

@@ -120,6 +120,18 @@ class PhpDumperTest extends \PHPUnit_Framework_TestCase
         }
     }
 
+    /**
+     * @expectedException InvalidArgumentException
+     * @expectedExceptionMessage Service id "bar$" cannot be converted to a valid PHP method name.
+     */
+    public function testAddServiceInvalidServiceId()
+    {
+        $container = new ContainerBuilder();
+        $container->register('bar$', 'FooClass');
+        $dumper = new PhpDumper($container);
+        $dumper->dump();
+    }
+
     public function testOverrideServiceWhenUsingADumpedContainer()
     {
         require_once self::$fixturesPath.'/php/services9.php';