Symfony2 creating twig extension

Question

I want to create a simple twig extension ({{imgWidth(...)}}) that calls getimagesize() and returns the width and height of an image on the server.

I followed the instuctions you can find here.

When I reload my page I only can see a blank page - the error.log tells me that

PHP Fatal error: Class 'Fms\MediaBundle\Twig\Extension\ImgsizeExtension' not found in /var/www/fms/app/cache/dev/appDevDebugProjectContainer.php on line 4773

The service in MediaBundle\Resources\config\services.yml looks like:

services:
    twig.extension.imgsize:
        class: Fms\MediaBundle\Twig\Extension\ImgsizeExtension
        tags:
            - name: twig.extension

The class is:

<?
// src/Fms/MediaBundle/Twig/Extension/ImgsizeExtension.php
namespace Fms\MediaBundle\Twig\Extension;

class ImgsizeExtension extends \Twig_Extension
{
    public function getFunctions()
    {
        return array(
            new \Twig_SimpleFunction('imgsize', array($this, 'imgWidth'))
        );
    }

    public function imgWidth($mediaId = 0, $mediaSize = 'L')
    {
        // ...
        return $mediaId;
    }

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

Clearing cache via console or manually didnt help too.

A blank page suggest you are running in production mode while the error log indicates you are in development mode. Double check that you are in development mode. Do you get a profile bar without the extension? It looks like your config is correct, I think you are running in production mode and that you have something else wrong. — Cerad
– Cerad, Commented Dec 6, 2014 at 14:32
Nah i'm in devMode. As soon as i remove the code in the service everything is ok (including the debug-bar). — Ferret
– Ferret, Commented Dec 6, 2014 at 14:34
Ok but in development mode I would expect errors to be shown right in the browser. — Cerad
– Cerad, Commented Dec 6, 2014 at 15:01
Yes i see errors in the most cases - maybe just an apache-misconfig or the like. But Twig-Extension should work, but i get the same message even when i copy/paste the given example... — Ferret
– Ferret, Commented Dec 6, 2014 at 18:39
If it was me, I would resolve the errors. Maybe update your question with a few of them. — Cerad
– Cerad, Commented Dec 6, 2014 at 18:48

Grzegorz Krauze · Accepted Answer · 2014-12-07 01:35:19Z

2

Change <? to <?php. I copied your code and in with this modification symfony finally finds this class.

answered Dec 7, 2014 at 1:35

Grzegorz Krauze

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