How to flush APC class loader cache?

Question

The Performance Symfony book mentions the need to flush the APC cache when some classes have moved and this is indeed needed.

However, I don't find how to clear the APC cache for autoloaders. I tried with the PHP apc_clear_cache() function, but it didn't help.

How to clear this APC cache?

apc_clear_cache() must works well. Do you already check if your problem is not with the symfony cache? — Mauro, Feb 15 '13 at 12:17
Thanks, I will try with `apc_clear_cache` again, I may have not used the correct string. I cleared the Symfony cache as well (and all Composer generated autoloaders), but with no success. — Michaël Perrin, Feb 15 '13 at 13:31

score 5 · Accepted Answer · edited May 23 '17 at 12:25

5

As mentioned by Mauro apc_clear_cache can also take an argument to clear different types of apc caches:

  apc_clear_cache();
  apc_clear_cache('user');
  apc_clear_cache('opcode');

Please also see this related post on SO.

And there is also ApcBundle which adds a Symfony apc:clear command.

edited May 23 '17 at 12:25

Community

1
1

answered Mar 04 '13 at 08:03

Fooman

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9
11

For information, the mentioned lines have to be executed in the Symfony2 application. Adding them temporarily in `app.php` does the trick. – Michaël Perrin Jul 04 '13 at 15:19

score 2 · Answer 2 · answered Nov 25 '14 at 07:36

Just create one simple controller ApcController as below

<?php

namespace Rm\DemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use JMS\SecurityExtraBundle\Annotation\Secure;

/**
 * apc cache clear controller
 */
class ApcController extends Controller
{

    /**
     * clear action
     *
     * @Route("/cc", name="rm_demo_apc_cache_clear")
     *
     * @Secure(roles="ROLE_SUPER_ADMIN, ROLE_ADMIN")
     *
     * @param \Symfony\Component\HttpFoundation\Request $request
     */
    public function cacheClearAction(Request $request)
    {

        $message = "";

        if (function_exists('apc_clear_cache') 
                && version_compare(PHP_VERSION, '5.5.0', '>=') 
                && apc_clear_cache()) {

            $message .= ' User Cache: success';

        } elseif (function_exists('apc_clear_cache') 
                && version_compare(PHP_VERSION, '5.5.0', '<') 
                && apc_clear_cache('user')) {

            $message .= ' User Cache: success';

        } else {

            $success = false;
            $message .= ' User Cache: failure';

        }

        if (function_exists('opcache_reset') && opcache_reset()) {

            $message .= ' Opcode Cache: success';

        } elseif (function_exists('apc_clear_cache') 
                && version_compare(PHP_VERSION, '5.5.0', '<') 
                && apc_clear_cache('opcode')) {

            $message .= ' Opcode Cache: success';

        } else {
            $success = false;
            $message .= ' Opcode Cache: failure';
        }

        $this->get('session')->getFlashBag()
                            ->add('success', $message);

        // redirect
        $url = $this->container
                ->get('router')
                ->generate('sonata_admin_dashboard');

        return $this->redirect($url);
    }

}

Then import controller routes to your routing.yml

#src/Rm/DemoBundle/Resources/config/routing.yml
apc:
    resource: "@RmDemoBundle/Controller/ApcController.php"
    type:     annotation
    prefix:   /apc

Now you can clear apc cache using below url:

http://yourdomain/apc/cc

NOTE : @Secure(roles="ROLE_SUPER_ADMIN, ROLE_ADMIN") annotation, this will protect you apc cache url from unauthorized access.

How to flush APC class loader cache?

2 Answers2