Title: Deprecated + Cannot modify header information
Last modified: April 23, 2022

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# Deprecated + Cannot modify header information

 *  Resolved [manuel75](https://wordpress.org/support/users/manuel75/)
 * (@manuel75)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/deprecated-cannot-modify-header-information/)
 * It seems that Groups is not compliant with PHP 8.0+ and/or Last Version of WordPress.
   —
   To reproduce: Update to the last version of WordPress + PHP 8.0 then activate
   debug logs, and you will have a lot of logs of these types:
 *     ```
       Deprecated: version_compare(): Passing null to parameter #2 ($version2) of type string is deprecated in /home/faheyroot/kb.fahey.associates/wp-content/plugins/groups/lib/admin/class-groups-admin-welcome.php on line 76
   
       Warning: Cannot modify header information - headers already sent by (output started at /home/faheyroot/kb.fahey.associates/wp-content/plugins/groups/lib/admin/class-groups-admin-welcome.php:76) in /home/faheyroot/kb.fahey.associates/wp-admin/includes/misc.php on line 1310
   
       Warning: Cannot modify header information - headers already sent by (output started at /home/faheyroot/kb.fahey.associates/wp-content/plugins/groups/lib/admin/class-groups-admin-welcome.php:76) in /home/faheyroot/kb.fahey.associates/wp-admin/admin-header.php on line 9
       ```
   
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fdeprecated-cannot-modify-header-information%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [Tanue Eugen-Bleck Mbunwo](https://wordpress.org/support/users/eugenbleck/)
 * (@eugenbleck)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/deprecated-cannot-modify-header-information/#post-15593512)
 * Hi Manuel,
 * Good afternoon. I trust you are well and safe!
 * Thank you so much for sharing these notices. It is currently being looked into
   and would be fixed in the next update.
 * STAY SAFE and I wish you a very fine and productive day ahead!
    Best, Eugen.
 *  Plugin Author [Kento](https://wordpress.org/support/users/proaktion/)
 * (@proaktion)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/deprecated-cannot-modify-header-information/#post-15605993)
 * Yeah, this should be fixed. Thanks!
 *  Plugin Author [Kento](https://wordpress.org/support/users/proaktion/)
 * (@proaktion)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/deprecated-cannot-modify-header-information/#post-15606786)
 * FYI this has been fixed in Groups 2.16.2 just released. The warning occurred 
   as of PHP 8.1.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Deprecated + Cannot modify header information’ is closed to new replies.

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## Tags

 * [deprecated](https://wordpress.org/support/topic-tag/deprecated/)

 * 3 replies
 * 3 participants
 * Last reply from: [Kento](https://wordpress.org/support/users/proaktion/)
 * Last activity: [4 years, 1 month ago](https://wordpress.org/support/topic/deprecated-cannot-modify-header-information/#post-15606786)
 * Status: resolved