Critical error when plugin deactivated

  • Resolved Joe Bloggs

    (@joe-bloggs)


    2 years, 11 months ago

    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: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()
    #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

    (@isaumya)

    2 years, 11 months ago

    Hi @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

    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

    (@joe-bloggs)

    2 years, 11 months ago

    Thanks @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, 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

    (@isaumya)

    2 years, 11 months ago

    Hi @joe-bloggs,
    Unfortunately no. You can try disabling the opcahe purge option inside the plugin settings (screenshot: https://i.imgur.com/9SMANfp.jpeg) and then check if the plugin works with that opcache function being disabled.

    Thread Starter Joe Bloggs

    (@joe-bloggs)

    2 years, 11 months ago

    No worries, thanks for your help @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

    (@isaumya)

    2 years, 11 months ago

    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)

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