Title: Plugin has no valid header/APC caching
Last modified: October 25, 2016

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# Plugin has no valid header/APC caching

 *  [kustv](https://wordpress.org/support/users/kustv/)
 * (@kustv)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/)
 * Hello,
    upon activating your plugin I am getting an error message”Plugin has 
   no valid header”. I went to the plugin page and activated it from there which
   worked, and I activated APC. I edited my htacess but nothing is working – it 
   shows 12MB cache in backend, but the page is extremely slow and I checked page
   source code andno cache was performed…what am I doing wrong?

Viewing 10 replies - 1 through 10 (of 10 total)

 *  Thread Starter [kustv](https://wordpress.org/support/users/kustv/)
 * (@kustv)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8354204)
 * Actually, I now just changed to the newest version of PHP(7.0 latest FPM) and
   now Icannot enable APC at all – it is not in the dropdown menu, even though my
   host said it is enabled on my server, and I tried W3 Total cache with APC and
   it worked. I prefer your plugin though and would like to use it with PHP 7.0 
   and APC…
 *  [dammsugare](https://wordpress.org/support/users/dammsugare/)
 * (@dammsugare)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8362680)
 * I have the same problem! Cachify does not work with PHP 7.0 when trying to use
   APCu. Please, could you update on this?
 *  [Pascal Birchler](https://wordpress.org/support/users/swissspidy/)
 * (@swissspidy)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8373115)
 * APC and APCu are different things. APC worked until PHP up to version 5.5 or 
   so and Cachify supported it. It’s not in the dropdown menu because your host 
   probably installed APCu for PHP 7.0. APCu is kinda like the successor to APC 
   because of the built-in OPcache in newer PHP version.
    With that being said, 
   APCu in specific is not (yet) supported by Cachify.
 *  [dammsugare](https://wordpress.org/support/users/dammsugare/)
 * (@dammsugare)
 * [9 years, 7 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8373235)
 * Thank you for your update. Is there any chance for the future for Cachify to 
   support APCu? I hate to use these bloated caching plugins tthat slow down my 
   backend…
 *  [ramonjosegn](https://wordpress.org/support/users/ramonjosegn/)
 * (@ramonjosegn)
 * [9 years, 6 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8506752)
 * The same problem here…
 *  [Johannes Jülg](https://wordpress.org/support/users/timse201/)
 * (@timse201)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8693869)
 * the header error is fixed now if you redownload the plugin or just delete the
   folder trunk in plugin folder
 *  [ramonjosegn](https://wordpress.org/support/users/ramonjosegn/)
 * (@ramonjosegn)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8694057)
 * Thanks for support
 *  Thread Starter [kustv](https://wordpress.org/support/users/kustv/)
 * (@kustv)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8696300)
 * I redownloaded and even deleted all the options in my database but it still does
   not show APC in the options.
 *  [ramonjosegn](https://wordpress.org/support/users/ramonjosegn/)
 * (@ramonjosegn)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8697810)
 * I can look its not caching in this versión, webpagetest.org show me the same 
   view for first, second and last third visit and the HTML code not show “caching
   by”
 *  [Johannes Jülg](https://wordpress.org/support/users/timse201/)
 * (@timse201)
 * [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8698598)
 * thats true
    the no valid header error will not appear but uAPC is not supported(
   at the moment – you can help if you want [here with some code via pull request](https://github.com/pluginkollektiv/cachify))
 * please see the compatibility chart for apc and php: [https://en.wikipedia.org/wiki/List_of_PHP_accelerators#Compatibility_chart](https://en.wikipedia.org/wiki/List_of_PHP_accelerators#Compatibility_chart)
   
   php7 does not support apc
 * please note apcu is not apc
    -  This reply was modified 9 years, 4 months ago by [Johannes Jülg](https://wordpress.org/support/users/timse201/).

Viewing 10 replies - 1 through 10 (of 10 total)

The topic ‘Plugin has no valid header/APC caching’ is closed to new replies.

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 * 10 replies
 * 5 participants
 * Last reply from: [Johannes Jülg](https://wordpress.org/support/users/timse201/)
 * Last activity: [9 years, 4 months ago](https://wordpress.org/support/topic/plugin-has-no-valid-headerapc-caching/#post-8698598)
 * Status: not resolved