Title: zlib error
Last modified: March 13, 2019

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# zlib error

 *  Resolved [djcuppat](https://wordpress.org/support/users/djcuppat/)
 * (@djcuppat)
 * [7 years, 3 months ago](https://wordpress.org/support/topic/zlib-error-2/)
 * I get this message at the very bottom of the Tools page
 * Notice: ob_end_flush(): failed to send buffer of zlib output compression (0) 
   in /[website]/wp-includes/functions.php on line 3778
 * Is this related to the availability of compression for a site? The site is running
   PHP7.2 (switched from 5.6->7.2 yesterday)
 * Thank you for the most amazing security plugin!!

Viewing 1 replies (of 1 total)

 *  Plugin Author [gioni](https://wordpress.org/support/users/gioni/)
 * (@gioni)
 * [7 years, 3 months ago](https://wordpress.org/support/topic/zlib-error-2/#post-11308973)
 * It doesn’t belong to the plugin. It looks like some kind of a childish compression(
   page optimization) plugin because normally compression must be performed by a
   front-end server, not PHP.

Viewing 1 replies (of 1 total)

The topic ‘zlib error’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [gioni](https://wordpress.org/support/users/gioni/)
 * Last activity: [7 years, 3 months ago](https://wordpress.org/support/topic/zlib-error-2/#post-11308973)
 * Status: resolved