Title: PHP8 compatibility
Last modified: February 26, 2021

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# PHP8 compatibility

 *  Resolved [sachawp](https://wordpress.org/support/users/sachawp/)
 * (@sachawp)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/php8-compatibility-6/)
 * Hello,
    I need to upgrade my environnement from php 7.3 to php 8.0 and the wise
   chat pro PlugIn is blocking me. The php update on my server works fine and my
   websites are working but the wp admin page is not displaying anymore. I can access
   it again once the wisechat plugin is disabled
 * my php debug log is full of this kind of errors :
    PHP Warning: Use of undefined
   constant COOKIEHASH – assumed ‘COOKIEHASH’ (this will throw an Error in a future
   version of PHP) in /home/admin/public_html/wp-content/plugins/wise-chat-pro/src/
   WiseChatContainer.php on line 110
 * Can you confirm compatibility and if not a schedule for a corrective patch?
 * Regards

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

 *  Thread Starter [sachawp](https://wordpress.org/support/users/sachawp/)
 * (@sachawp)
 * [5 years, 3 months ago](https://wordpress.org/support/topic/php8-compatibility-6/#post-14105917)
 * Please note that i also have the ultralight ajax bug (chat not refreshing for
   clients except super admin) as stated by many users here.
    It sometimes works
   a few days after i activate it in the advanced option without me being able to
   explain how or why. my environement is in multisite wordpress
 *  Plugin Author [Marcin](https://wordpress.org/support/users/marcinlawrowski/)
 * (@marcinlawrowski)
 * [4 years, 9 months ago](https://wordpress.org/support/topic/php8-compatibility-6/#post-14772184)
 * Hello [@sachawp](https://wordpress.org/support/users/sachawp/)
 * COOKIEHASH error was fixed in the latest version of Wise Chat Pro.
 * For ajax engine difficulties please contact us directly on [https://kaine.pl](https://kaine.pl)
 * Best regards

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

The topic ‘PHP8 compatibility’ is closed to new replies.

 * ![](https://ps.w.org/wise-chat/assets/icon-128x128.png?rev=1306481)
 * [Wise Chat](https://wordpress.org/plugins/wise-chat/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wise-chat/#faq)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/wise-chat/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [Marcin](https://wordpress.org/support/users/marcinlawrowski/)
 * Last activity: [4 years, 9 months ago](https://wordpress.org/support/topic/php8-compatibility-6/#post-14772184)
 * Status: resolved