title: Doctrine Caching - upgrading to PHP 5/6
body: <p>I'm in the process of upgrading my server from PHP 5.4 to PHP 5.6.  One of the performance enhancments I use is to cache Doctrine results:</p>
  
  <pre><code>$query-&gt;useResultCache('cache_key', 300);
  </code></pre>
  
  <p>I have Symfony configured to use APC for caching:</p>
  
  <pre><code>doctrine:
      orm:
          metadata_cache_driver: apc
          result_cache_driver: apc
          query_cache_driver: apc
  </code></pre>
  
  <p>In PHP 5.6, APC is removed, so I will install the APCu extension.  Does the Symfony configuration need to be updated to use APCu, or will the <code>apc</code> cache drivers work with APCu?</p>