Title: PHP error Serverpilot install
Last modified: August 31, 2016

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# PHP error Serverpilot install

 *  [shaunik](https://wordpress.org/support/users/shaunik/)
 * (@shaunik)
 * [10 years, 2 months ago](https://wordpress.org/support/topic/php-error-serverpilot-install/)
 * Not sure if it is warning with HHVM but got this on my Serverpilot install
 * Warning: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a 
   reference, value given in /srv/users/serverpilot/apps/careevidence/public/wp-
   includes/functions.php on line 3464
 * [https://wordpress.org/plugins/w3-total-cache/](https://wordpress.org/plugins/w3-total-cache/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Rob Migchels](https://wordpress.org/support/users/dhrrob/)
 * (@dhrrob)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/php-error-serverpilot-install/#post-7180864)
 * Same error here :/
 * Warning: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a 
   reference, value given in /srv/users/serverpilot/apps/XXXXXXX/public/wp-includes/
   functions.php on line 3549
 *  [Kimberly](https://wordpress.org/support/users/amiga500/)
 * (@amiga500)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/php-error-serverpilot-install/#post-7180865)
 * Check my reply here: [https://wordpress.org/support/topic/there-are-depricated-functions?replies=3](https://wordpress.org/support/topic/there-are-depricated-functions?replies=3)
 * The answer to your problem is the one about ob_callback().
 * ~Kimberly

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘PHP error Serverpilot install’ is closed to new replies.

 * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806)
 * [W3 Total Cache](https://wordpress.org/plugins/w3-total-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/w3-total-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/w3-total-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/w3-total-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/w3-total-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/w3-total-cache/reviews/)

## Tags

 * [PHPError](https://wordpress.org/support/topic-tag/phperror/)
 * [serverpilot](https://wordpress.org/support/topic-tag/serverpilot/)

 * 2 replies
 * 3 participants
 * Last reply from: [Kimberly](https://wordpress.org/support/users/amiga500/)
 * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/php-error-serverpilot-install/#post-7180865)
 * Status: not resolved