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How to resolve an error in advanced-cache.php

If you activate 2 caching plugins (or at least the functionality) at the same time, this might cause a fatal error and break your site.

Follow these instructions to recover your site:

  • Connect to your server via FTP (or an other way if you prefer).
  • Browse to the root of the WordPress installation, where you should have a file named wp-config.php.
  • Download this file and open it in a text editor, such as notepad (Windows) or textedit (Mac).
  • Locate the line define('WP_CACHE', true);, delete it, save the file and upload it back via FTP.
  • Then still via FTP, enter the folder wp-content and delete the file advanced-cache.php
  • You should now be able to reconnect to your administration.
  • Go to one or all of your caching plugins settings, and only keep 1 activated.

If the error comes back before you had a chance to do this:

  • Try the first part again, and before going to the admin, do the following:
  • Using FTP, browse to the folder wp-content/plugins, and rename the folders of all caching plugins (for example by adding a -).
  • Then go to Plugins in your administration, and make sure the cache plugins are deactivated.
  • Using FTP, browse to the folder wp-content/plugins, and rename the folders of all caching plugins back to their original names.
  • You can now reactivate the caching plugin of your choice.

Posted in: Cache