title: OpCache with Symfony
body: <p>I know you can use with Symfony APC or XCache Class Loader.
  Unfortunately, in the shared server where I put my Symfony code, there is only OpCache with is activated.</p>
  
  <p>Can I use Symfony with OpCache ?
  If yes, how and what is the code to put in my app.php please ?
  If not, why please ?</p>