Title: Zlib compression is activated
Last modified: August 31, 2016

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# Zlib compression is activated

 *  [CAhlback](https://wordpress.org/support/users/cahlback/)
 * (@cahlback)
 * [10 years, 2 months ago](https://wordpress.org/support/topic/zlib-compression-is-activated/)
 * Hi!
 * Wrote this below on the W3 Total Cache forum, but had no replies. Posting it 
   here as well, since I’ve got the same problem shown when I tried WP Super Cache,
   and it really doesn’t matter to me which cache plugin I use, only that I actually
   get a cache plugin working! Hoping to find some answers here!
 * I just tried W3 Total Cache, but the plugin gives me this message:
 * “Either the PHP configuration, web server configuration or a script in the WordPress
   installation has zlib.output_compression enabled.
    Please locate and disable 
   this setting to ensure proper HTTP compression behaviour.”
 * WP Super Cache gives me a similar error message.
 * Now, I honestly don’t know very much about caching, and nothing more about Zlib,
   than it is compression between the server and the browser making stuff speed 
   up. Thought and hoped Caching would be rather easy just turning on, and getting
   a quicker site! 🙂
 * I’ve contacted my web hotel, and they won’t turn Zlib off.They tell me that I
   need their VPS service to do that. So, I’m wondering:
 * 1) Do Zlib and W3 Total Cache interfere with each other, or can/should I still
   run W3 Total Cache? Are there some specific setting I should use then?
 * 2) Are they actually right? I’ve seen some forum threads discuss how to do this
   in the different php.ini fond in the wp catalogs ( /wp-admin/ – /wp-content/ –/
   wp-includes/ ). This makes me wonder if they know what they are talking about…
   But who am I to tell, that’s why I’m asking! 🙂
 * 3) I would be glad if someone could give me some more info about Zlib, since 
   I haven’t found very much details about it on Google. Should I be happy with 
   it? Is it just as good as W3 Total Cache, or should I try to argue my web hotel
   about them turning Zlib off?
 * Cheers!
 * Christoffer
 * [https://wordpress.org/plugins/wp-super-cache/](https://wordpress.org/plugins/wp-super-cache/)

The topic ‘Zlib compression is activated’ is closed to new replies.

 * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220)
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## Tags

 * [cache](https://wordpress.org/support/topic-tag/cache/)
 * [php.ini](https://wordpress.org/support/topic-tag/php-ini/)
 * [zlib](https://wordpress.org/support/topic-tag/zlib/)

 * 0 replies
 * 1 participant
 * Last reply from: [CAhlback](https://wordpress.org/support/users/cahlback/)
 * Last activity: [10 years, 2 months ago](https://wordpress.org/support/topic/zlib-compression-is-activated/)
 * Status: not resolved