title: Symfony 1.4 & APC - "The apc extension must be loaded for using this backend!"
body: <p>I just installed apc (lates stable / latest beta), phpinfo() shows the apc-module.
  If I do a symfony cc I get the message
  "  The apc extension must be loaded for using this backend !  "</p>
  
  <p>I put this in my app's configuration Class:</p>
  
  <pre><code>public function configureDoctrine(Doctrine_Manager $manager)
  {
    $manager-&gt;setAttribute(Doctrine::ATTR_QUERY_CACHE, new Doctrine_Cache_Apc());
  }
  </code></pre>
  
  <p>and this in my php.ini:</p>
  
  <pre><code>extension=apc.so
  </code></pre>
  
  <p>It worked fine on my development-system but does not on the web-server. What's the cause of this problem?</p>
  
  <p>PHP-Version:
  PHP 5.3.10-1ubuntu3.4 with Suhosin-Patch (cli) (built: Sep 12 2012 18:59:41) 
  Copyright (c) 1997-2012 The PHP Group
  Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies</p>