Title: [Plugin: WP Super Cache] Caching interferes with More Fields plugin
Last modified: August 19, 2016

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# [Plugin: WP Super Cache] Caching interferes with More Fields plugin

 *  [jeffpar](https://wordpress.org/support/users/jeffpar/)
 * (@jeffpar)
 * [16 years, 7 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-caching-interferes-with-more-fields-plugin/)
 * I use the “More Fields” plugin, which lets me add a “File List” Custom Field 
   to my Add/Edit Post pages. The “File List” control works by issuing an AJAX request
   to “/wp-content/plugins/more-fields/more-fields-write-js.php?post_id=xxx&…”, 
   but that request fails when WP Super Cache is enabled — even when I explicitly
   add “more-fields-write-js\.php” to list of strings not to be cached.
 * Here’s why: at the time the AJAX request is made, I have to be logged in, and
   the effect of being logged in causes WP Super Cache to append the string `<!--
   WP Super Cache did not cache this page because you are logged in and "Don't cache
   pages for logged in users" is enabled. -->` to the AJAX result, which effectively
   mangles the JSON string being returned.
 * My solution was to rearrange a couple of tests being performed in wp-cache-phase2.
   php, so that it FIRST checks `if (!in_array($script, $cache_acceptable_files)&&
   wp_cache_is_rejected($wp_cache_request_uri))` BEFORE it checks `if ( $wp_cache_not_logged_in&&
   is_user_logged_in() && !is_feed() && !is_admin() )`
 * This simple change insures that anything I explicitly block from being cached
   won’t be modified either. It allows “More Fields” to work properly, and it allows
   me to easily fix any other incompatible plugins that I might run into.
 * Perhaps this change will someday make its way into WP Super Cache….

The topic ‘[Plugin: WP Super Cache] Caching interferes with More Fields plugin’ 
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 * 1 participant
 * Last reply from: [jeffpar](https://wordpress.org/support/users/jeffpar/)
 * Last activity: [16 years, 7 months ago](https://wordpress.org/support/topic/plugin-wp-super-cache-caching-interferes-with-more-fields-plugin/)
 * Status: not a support question

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