OPcache overview

OPcache is a caching engine built into PHP. When enabled, it dramatically increases the performance of websites that utilize PHP.

From php.net:

OPcache improves PHP performance by storing precompiled script bytecode in shared memory, thereby removing the need for PHP to load and parse scripts on each request.

OPcache is already enabled by default.

1. Navigate to the Manage Domains page.
2. Click the Edit button to the right of your domain under the ‘Web Hosting’ column.

   

3. Scroll down to the ‘Web Options’ section and check the box next to 'PHP OpCache Support'.
4. Scroll down and click the Change settings button to save your changes.

Enabling OPcache on a Dedicated server

OPcache is already compiled with PHP 5.6 and 7. To enable it on your site, create a PHP.ini file. In that file add the following:

zend_extension=opcache.so

Checking in a phpinfo.php file

You can confirm if OPcache is functioning by creating and viewing a phpinfo.php file. View the following article for details:

• Creating a phpinfo.php file

When viewing your phpinfo.php file, you should see the following:

If you do not see OPcache listed, view the troubleshooting section in the PHP.ini article for assistance:

• Troubleshooting PHP.ini changes

Checking via the command line

To see if the module was installed correctly, you can run the following command. You should see the OPcache settings appear:

[server]$ php-7.2 -i | grep opcache

View the following link for a list of available runtime configurations you can use:

• http://php.net/manual/en/opcache.configuration.php

DreamPress

OPcache has replaced XCache for all DreamPress sites. OPcache is enabled by default which you can see in a phpinfo.php file as mentioned above.

WordPress plugin

The WP OPcache plugin is useful to flush OPcache easily.