Question: How do I enable OPcache in PHP?

How do I turn on OPcache?

OPcache can only be compiled as a shared extension. If you have disabled the building of default extensions with –disable-all, you must compile PHP with the –enable-opcache option for OPcache to be available. Once compiled, you can use the zend_extension configuration directive to load the OPcache extension into PHP.

How do I use OPcache in PHP?

OPCache can only be compiled as a shared extension under this version. Firstly, you need to enable the building of default extension with –enable-opcache option to make it available. Afterwards, you can use the zend_extension configuration directive to lead the OP Cache extension into PHP.

How can I tell if PHP OPcache is enabled?


  1. Check which PHP handler is used by the website at Domains > > PHP Settings > PHP support ( PHP version …) …
  2. Check if Opcache is enabled for the domain at Domains > > PHP Settings > Performance Settings > opcache.enable “on”

How do I know if OPcache is enabled?

To check if the extension is loaded and enabled look at the PHP info page under the Zend OPcache heading.

Is Opcache enabled?

OPcache is already enabled by default.


Should I enable Opcache?

I have opcache enabled in production and have had no problems. There is undoubtedly a performance improvement so I would recommend enabling it.


PHP JIT Compilation and Machine Learning and Big Data

Because JIT works best with CPU-intensive processing, and PHP is considered one of the easier languages to learn because of its lightweight syntax, I think we’ll see PHP become a major player in machine learning and big data ecosystems.

What does PHP FPM do?

A: PHP-FPM (FastCGI Process Manager) is a web tool used to speed up the performance of a website. It is much faster than traditional CGI based methods and has the ability to handle tremendous loads simultaneously.

What is APCu?

APCu is a user-accessible PHP cache. Pantheon provides APCu by default across all plans, but the size of the APCu memory cache (apc. … See the Application Containers overview to learn more about APCu on Pantheon’s container architecture.

How do you flush OPcache?

To flush the Opcache in a mod_php scenarion, you can either reload or restart your Apache webserver. A reload should be sufficient as it will clear the Opcache in PHP. A restart will also work, but is more invasive as it kills all active HTTP connections.

How do I disable PHP INI OPcache?

You need to set it outside PHP:

  1. If PHP runs as Apache module, use an .htaccess file: php_flag opcache.enable Off.
  2. If PHP runs as CGI/FastCGI, use a .user.ini file: opcache.enable=0.

What is purge OPcache?

Since WP Rocket 2.7, you might have seen a new option in the admin bar to Purge OPCache, if your server has PHP 5.5 or higher. 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. …

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How do I disable OPcache?

How to disable OPcache on Turbo Web Hosting

  1. Log in to cPanel.
  2. In the Software and Services section of the cPanel home screen, click Select PHP Version.
  3. In the list of PHP extensions, clear the opcache check box.
  4. Click Save. OPcache is now disabled. To re-enable OPcache, select the opcache check box, and then click Save.
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