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copied!<h1>Access function / logic from twig and a controller</h1> <p>I think there are two solutions for this, both should use the <code>Twig_Function_Method</code> class.</p> <h2>1</h2> <p>The first solution <code>gilden</code> already posted, is to encapsulate the logic into a service and make a wrapper for the Twig Extension.</p> <h2>2</h2> <p>Another solution is to use only the Twig Extension. The Twig Extensino is already a service, you have to define it as service with the special <code><tag name="twig.extension" /></code>. But it's also a service, which instance you can grab by the service container. And it's also possible to inject other services:</p> <p>So you have your Twig Extension / Service:</p> <pre><code>class MyTwigExtension extends \Twig_Extension { private $anotherService; public function __construct(SecurityService $anotherService= null) { $this->anotherService = $anotherService; } public function foo($param) { // do something $this->anotherService->bar($param); } public function getFunctions() { // function names in twig => function name in this calss return array( 'foo' => new \Twig_Function_Method($this, 'foo'), ); } /** * Returns the name of the extension. * * @return string The extension name */ public function getName() { return 'my_extension'; } } </code></pre> <p>The services.xml looks like this</p> <pre><code><service id="acme.my_extension" class="Acme\CoreBundle\Twig\Extension\MyTwigExtension"> <tag name="twig.extension" /> <argument type="service" id="another.service"></argument> </service> </code></pre> <p>To acccess to the service from your controller you only have to use this:<br> <code>$this->container->get('acme.my_extension')</code></p> <p><strong>Notice</strong> The only difference to a normal service is, that the twig extension is not lazy loaded (<a href="http://symfony.com/doc/current/cookbook/templating/twig_extension.html#register-an-extension-as-a-service">http://symfony.com/doc/current/cookbook/templating/twig_extension.html#register-an-extension-as-a-service</a>) </p>

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