md5_twig extension

<?php
namespace Yout\Namespyce;

class MD5Extension extends \Twig_Extension {
    public function getFilters( ) {
        return array(
            'md5' => new \Twig_Filter_Method( $this, 'md5', array(
                'needs_environment' => true,
                'needs_context' => true,
                'is_safe' => array(
                    'md5' => true
                )
            ))
        );
    }

    public function md5( \Twig_Environment $environment, $context, $string ) {
        $loader = $environment->getLoader( );
        $parsed = $this->parseString( $environment, $context, $string );
        $environment->setLoader( $loader );
        return md5($parsed);
    }

    protected function parseString( \Twig_Environment $environment, $context, $string ) {
        $environment->setLoader( new \Twig_Loader_String( ) );
        return $environment->render( $string, $context );
    }

    public function getName( ) {
        return 'md5';
    }
}


service:
    twig.md5:
        class: Your\Bundle\Namespace\MD5Extension
        tags:
            - { name: twig.extension }