Title: Call to undefined function request_filesystem_credentials()
Last modified: August 30, 2016

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# Call to undefined function request_filesystem_credentials()

 *  Resolved [zeki893](https://wordpress.org/support/users/zeki893/)
 * (@zeki893)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/)
 * PHP Fatal error: Call to undefined function request_filesystem_credentials() 
   in /var/www/wordpress/wp-content/plugins/nginx-cache/nginx-cache.php
 * [https://wordpress.org/plugins/nginx-cache/](https://wordpress.org/plugins/nginx-cache/)

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

 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6488951)
 * What’s the context?
 *  Thread Starter [zeki893](https://wordpress.org/support/users/zeki893/)
 * (@zeki893)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489076)
 * should i be worried about this? is this functioning correctly still?
 * 2015/08/28 17:45:47 [error] 3004#0: *348493 FastCGI sent in stderr: “PHP message:
   PHP Fatal error: Call to undefined function request_filesystem_credentials() 
   in /var/www/wordpress/wp-content/plugins/nginx-cache/nginx-cache.php on line 
   250” while reading response header from upstream, client: 188.114.98.64, server:
   nerdreactor.com, request: “POST /2011/10/18/giveaway/trackback/ HTTP/1.1”, upstream:“
   fastcgi://unix:/var/run/php5-fpm.sock:”, host: “xxx.com”, referrer: “[https://www.facebook.com/video.php?v=1184348088248515&#8221](https://www.facebook.com/video.php?v=1184348088248515&#8221);
 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489115)
 * Did that error only occur once, or does it occur repeatedly?
 *  [commando](https://wordpress.org/support/users/commando/)
 * (@commando)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489254)
 * I’m getting it today. As soon as I switch themes to Photocrati it white screens
   and the only way recover is to run the SQL below against the database.
 * I have a WordPress multisite install which otherwise works fine. I can do some
   limited experimentation, but it’s a production site so I can’t do too much that
   could break it.
 * Note that I use HHVM, the Facebook written PHP VM, rather than standard PHP. 
   I run on Amazon Linux, obviously on one of their VPS systems.
 * [Tue Jan 26 17:31:30 2016] [hphp] [2979:7f1b01229700:1979:000001] [] \nFatal 
   error: Call to undefined function request_filesystem_credentials() in /var/www/
   wordpress/wp-content/plugins/nginx-cache/nginx-cache.php on line 250
 * UPDATE wp_options SET option_value = ‘twentysixteen’ WHERE option_name = ‘template’;
   
   UPDATE wp_options SET option_value = ‘twentysixteen’ WHERE option_name = ‘stylesheet’;
   UPDATE wp_options SET option_value = ‘Twenty Sixteen’ WHERE option_name = ‘current_theme’;
 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489255)
 * Try disabling the plugin, then reactivating it.
 *  [commando](https://wordpress.org/support/users/commando/)
 * (@commando)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489256)
 * You can’t – the entire website including admin area white screens.
 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489257)
 * Try deleting the plugin via (S)FTP.
 *  [commando](https://wordpress.org/support/users/commando/)
 * (@commando)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489258)
 * Yeah I did. I was telling you in case you wanted to fix it 🙂
 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489259)
 * Ah. I’ve already fixed this on Github a long time ago. I’ll release an update
   on wp.org soon.
 *  [commando](https://wordpress.org/support/users/commando/)
 * (@commando)
 * [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489260)
 * Would you mind posting a link to your github project?
 * Found it – [https://github.com/tillkruss/Nginx-FastCGI-Cache](https://github.com/tillkruss/Nginx-FastCGI-Cache)

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

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 * 10 replies
 * 3 participants
 * Last reply from: [commando](https://wordpress.org/support/users/commando/)
 * Last activity: [10 years, 4 months ago](https://wordpress.org/support/topic/call-to-undefined-function-request_filesystem_credentials-1/#post-6489260)
 * Status: resolved