Title: Fatal error when using Predis
Last modified: August 31, 2016

---

# Fatal error when using Predis

 *  Resolved [bradlol](https://wordpress.org/support/users/bradlol/)
 * (@bradlol)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-using-predis/)
 * Hi,
    I’m already using Predis on my WP website for PubSub. After activating Redis
   caching I get `PHP message: PHP Fatal error: Cannot declare class Predis\Autoloader,
   because the name is already in use in /wp-includes/predis/src/Autoloader.php 
   on line 20" while reading response header from upstream` Any idea how to fix 
   it?
 * [https://wordpress.org/plugins/redis-cache/](https://wordpress.org/plugins/redis-cache/)

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

 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-using-predis/#post-7048496)
 * I’ll fix this later today.
 *  Plugin Author [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * (@tillkruess)
 * [10 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-using-predis/#post-7048503)
 * This should be fixed in `1.2.2`.

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

The topic ‘Fatal error when using Predis’ is closed to new replies.

 * ![](https://ps.w.org/redis-cache/assets/icon-256x256.gif?rev=2568513)
 * [Redis Object Cache](https://wordpress.org/plugins/redis-cache/)
 * [Support Threads](https://wordpress.org/support/plugin/redis-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/redis-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/redis-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/redis-cache/reviews/)

## Tags

 * [caching](https://wordpress.org/support/topic-tag/caching/)
 * [object-cache](https://wordpress.org/support/topic-tag/object-cache/)
 * [predis](https://wordpress.org/support/topic-tag/predis/)
 * [redis](https://wordpress.org/support/topic-tag/redis/)

 * 2 replies
 * 2 participants
 * Last reply from: [Till Krüss](https://wordpress.org/support/users/tillkruess/)
 * Last activity: [10 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-when-using-predis/#post-7048503)
 * Status: resolved