Title: Critical error when plugin deactivated Last modified: May 2, 2023 --- # Critical error when plugin deactivated * Resolved [Joe Bloggs](https://wordpress.org/support/users/joe-bloggs/) * (@joe-bloggs) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/) * Hi there guys, * I was hoping you could please help me with the following error I’m getting when I try to deactivate the plugin: * Current plugin: Super Page Cache for Cloudflare (version 4.7.3) PHP version 8.2.5 * Error Details =============An error of type E_ERROR was caused in line 3157 of the file /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare- page-cache/libs/cache_controller.class.php. Error message: Uncaught Error: Call to undefined function opcache_get_status() in /var/www/vhosts/domain.com/httpdocs/ wp-content/plugins/wp-cloudflare-page-cache/libs/cache_controller.class.php:3157Stack trace:#0 /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare- page-cache/libs/cache_controller.class.php(693): SWCFPC_Cache_Controller->purge_opcache()# 1 /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare-page-cache/ libs/cache_controller.class.php(1167): SWCFPC_Cache_Controller->purge_all()#2/ var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare-page-cache/ wp-cloudflare-super-page-cache.php(1063): SWCFPC_Cache_Controller->reset_all()# 3 /var/www/vhosts/domain.com/httpdocs/wp-includes/class-wp-hook.php(308): SW_CLOUDFLARE_PAGECACHE- >deactivate_plugin()#4 /var/www/vhosts/domain.com/httpdocs/wp-includes/class- wp-hook.php(332): WP_Hook->apply_filters()#5 /var/www/vhosts/domain.com/httpdocs/ wp-includes/plugin.php(517): WP_Hook->do_action()#6 /var/www/vhosts/domain.com/ httpdocs/wp-admin/includes/plugin.php(814): do_action()#7 /var/www/vhosts/domain. com/httpdocs/wp-admin/plugins.php(209): deactivate_plugins()#8 {main}thrown * My server log then gives me this error: * Code 499 POST /wp-admin/admin-ajax.php?action=as_async_request_queue_runner&nonce =39619995f8 HTTP/2.0 * Code: 500 GET /wp-admin/plugins.php?action=deactivate&plugin=wp-cloudflare-page- cache%2Fwp-cloudflare-super-page-cache.php&plugin_status=all&paged=1&s&_wpnonce =9ced0b4273 HTTP/2.0 * As well as this warning: * 429901#0: *941324 FastCGI sent in stderr: “PHP message: PHP Warning: Array to string conversion in /var/www/vhosts/domain.com/httpdocs/wp-includes/pluggable. php on line 2292; PHP message: PHP Fatal error: Uncaught Error: Call to undefined function opcache_get_status() in /var/www/vhosts/domain.com/httpdocs/wp-content/ plugins/wp-cloudflare-page-cache/libs/cache_controller.class.php:3157 Stack trace:# 0 /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare-page-cache/ libs/cache_controller.class.php(693): SWCFPC_Cache_Controller->purge_opcache()# 1 /var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare-page-cache/ libs/cache_controller.class.php(1167): SWCFPC_Cache_Controller->purge_all()#2/ var/www/vhosts/domain.com/httpdocs/wp-content/plugins/wp-cloudflare-page-cache/ wp-cloudflare-super-page-cache.php(1063): SWCFPC_Cache_Controller->reset_all()# 3 /var/www/vhosts/domain.com/httpdocs/wp-includes/class-wp-hook.php(308): SW_CLOUDFLARE_PAGECACHE- >deactivate_plugin()#4 /var/www/vhosts/domain.com/httpdocs/wp-includes/class- wp-hook.php(332): WP_Hook->apply_filters()#5 /var/www/vhosts/domain.com/httpdocs/ wp-includes/plugin.php(517): WP_Hook->do_action()” while reading response header from upstream * Any ideas what could be happing and how to fix it? * Many thanks, * Jo Viewing 5 replies - 1 through 5 (of 5 total) * Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/) * (@isaumya) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16702976) * Hi [@joe-bloggs](https://wordpress.org/support/users/joe-bloggs/), Looking at the log it seems the issue is happening cause your server is not identifying an in-built PHP function `opcache_get_status()`. Link: [https://www.php.net/manual/en/function.opcache-get-status.php](https://www.php.net/manual/en/function.opcache-get-status.php) * You should check why this function is not available in your server as it is a default PHP function. Maybe the function is disabled at the server level, if so, please enable it. * Thread Starter [Joe Bloggs](https://wordpress.org/support/users/joe-bloggs/) * (@joe-bloggs) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16705742) * Thanks [@isaumya](https://wordpress.org/support/users/isaumya/) * You’re right, the `opcache_get_status()` was indeed disabled as Plesk apparently disables the function by default for security reasons. I’ve now enabled the function and it looks like it resolved the error issue. * Thanks for your help. * Btw. just for your information, here is the reply I received from my Plesk support: _The reason why Plesk disabled the `opcache\_get\_status` PHP function by default starting from 17.8 version was due to the following two security points:_ - On a shared hosting, since any customer is able to call [OPcache functions](http://php.net/manual/en/ref.opcache.php), by clearing out the cache using the function in question, an attacker customer can make the target customer have no benefits from caching; - Moreover, an attacker customer can see names of target’s cached PHP files. * It seems to be very valid point. * I wonder if there’s any other way your plugin could possibly function to, so it doesn’t require the opache_get_status function to be enabled. * Thanks again, * Jo * Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/) * (@isaumya) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16706154) * Hi [@joe-bloggs](https://wordpress.org/support/users/joe-bloggs/), Unfortunately no. You can try disabling the opcahe purge option inside the plugin settings ( screenshot: [https://i.imgur.com/9SMANfp.jpeg](https://i.imgur.com/9SMANfp.jpeg)) and then check if the plugin works with that opcache function being disabled. * Thread Starter [Joe Bloggs](https://wordpress.org/support/users/joe-bloggs/) * (@joe-bloggs) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16709226) * No worries, thanks for your help [@isaumya](https://wordpress.org/support/users/isaumya/) * Just one last question before closing this. * Should I also consider using Redis object cache alongside Super Cache for Cloudflare, or does your plugin cover that side too and Redis is not necessary? * Thanks again, Jo * Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/) * (@isaumya) * [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16710023) * > Should I also consider using Redis object cache alongside Super Cache for Cloudflare, > or does your plugin cover that side too and Redis is not necessary? * Well, honestly speaking, you don’t need object cache for most content website. Moreover, as this plugin makes your webpages cached at CDN level, most non-logged in traffic will not be hitting your origin server anyways as the response will be served from the CDN server. * That being said, if you still need object caching in your website, you need to install Redis separately. As this is a pure page caching plugin and does not provide object caching. * Hope this helps. 🙂 Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘Critical error when plugin deactivated’ is closed to new replies. * ![](https://ps.w.org/wp-cloudflare-page-cache/assets/icon-256x256.gif?rev=3234997) * [Super Page Cache – Cloudflare Cache, Page Speed & Core Web Vitals](https://wordpress.org/plugins/wp-cloudflare-page-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-cloudflare-page-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/) * [Active Topics](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/reviews/) * 5 replies * 2 participants * Last reply from: [iSaumya](https://wordpress.org/support/users/isaumya/) * Last activity: [3 years, 1 month ago](https://wordpress.org/support/topic/critical-error-when-plugin-deactivated/#post-16710023) * Status: resolved