Resolve Fatal error: Call to undefined function wp_cache_get() in WordPress [How-to]

Resolve Fatal error: Call to undefined function wp_cache_get() in WordPress [How-to]

Fatal error: Call to undefined function wp_cache_get() in /public_html/blog/wp-includes/functions.php on line 336

If you’re getting this error on your WordPress website and couldn’t even login your WordPress admin dashboard (wp-admin), we’ve solution for it.


1. If You Are Using W3-Total-Cache Plugin

Resolve Fatal error: Call to undefined function wp_cache_get() in WordPress [How-to]

In some cases, enabling Minify for CSS/JS or Database Caching in W3-Total-Cache setting will result in errors and your website breaking. To solve wp_cache_get error, you’re advised to disable these 2 options for the time being.

  1. Contact your web server since you’re not able to login your wp-admin. You can either live chat with your web server technician or send them an email. What you need them to do is disable W3-Total-Cache and other cache plugins and enable you to access WordPress admin page.
  2. Once you’re able to access WordPress admin page, update your WordPress to the latest version and keep W3-Total-Cache plugin disabled.
  3. Delete W3-Total-Cache plugin from WordPress admin page.
  4. Go to "Plugins" – "Add New". Search for "W3-Total-Cache" Install the plugin from the search result page and activate it.
  5. Now you have a fresh new W3-Total-Cache plugin installed in your WordPress. You’re advised to use only ONE cache plugin in WordPress.
  6. Go to W3-Total-Cache plugin settings page – “Performance” – "Minify".
  7. In "JaveScript" and "Cascading Style Sheets", untick "Enable" box to make both options disabled.

2. If You Just Upgraded WordPress with WP-Hive Installed

  1. Contact your web server since you’re not able to login your wp-admin. You can either live chat with your web server technician or send them an email. What you need them to do is disable WP-Hive plugin and enable you to access WordPress admin page by downgrading your WordPress to previous version before your upgrade it.
  2. Once you’re able to access WordPress admin page, delete WP-Hive plugin. The settings will be saved even you delete it.
  3. Download the latest version of WP-Hive.
  4. Go to "Plugins" – "Add New" – "Upload”. Browse the download zip file, upload and activate it.
  5. After this you can upgrade your WordPress to newer version.
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