Title: PHP Warning Cannot modify header information
Last modified: November 26, 2022

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# PHP Warning Cannot modify header information

 *  Resolved [SimpleRick](https://wordpress.org/support/users/keramikoch/)
 * (@keramikoch)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/)
 * Hi dear Litespeed Support,
 * I get the following errors every few seconds after upgrading to the newest / 
   recent version:
 * [26-Nov-2022 12:30:39 UTC] PHP Warning session_set_save_handler(): Session save
   handler cannot be changed after headers have already been sent in xxx/public_html/
   wp-content/plugins/geotargetingwp/vendor/ericmann/sessionz/php/Manager.php on
   line 133
 * [26-Nov-2022 12:30:39 UTC] PHP Warning Cannot modify header information – headers
   already sent in xxx/public_html/wp-content/plugins/litespeed-cache/src/vary.cls.
   php on line 735
 * I dont know if the error messages are linked so I post both (the second one is
   a litespped error)
    May you help what we could do?
 * Thanks in advance.

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Support [qtwrk](https://wordpress.org/support/users/qtwrk/)
 * (@qtwrk)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16237688)
 * please provide the report number
 * you can get it in toolbox -> report -> click “send to LiteSpeed”
 *  Thread Starter [SimpleRick](https://wordpress.org/support/users/keramikoch/)
 * (@keramikoch)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16239686)
 * I did 🙂
    Report number: GYQQSDEL Report date: 11/28/2022 09:03:44
 *  Thread Starter [SimpleRick](https://wordpress.org/support/users/keramikoch/)
 * (@keramikoch)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16248183)
 * Hi dear team,
 * any updates? Thanks in advance.
 *  Thread Starter [SimpleRick](https://wordpress.org/support/users/keramikoch/)
 * (@keramikoch)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16260330)
 * no news?
 *  [usabe](https://wordpress.org/support/users/usabe/)
 * (@usabe)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16419489)
 * Hi [@keramikoch](https://wordpress.org/support/users/keramikoch/)
 * Due to inactivity of this topic and recent lscwp updates, I will mark this topic
   as “resolved”. If you still have such issues, please feel free to open a ticket
   with further information by emailing to [support@litespeedtech.com](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/support@litespeedtech.com?output_format=md).
   Remember to reference this topic and ask to assign your ticket to Abe. I will
   check into this further from there.

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘PHP Warning Cannot modify header information’ is closed to new replies.

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 * 5 replies
 * 3 participants
 * Last reply from: [usabe](https://wordpress.org/support/users/usabe/)
 * Last activity: [3 years, 4 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header-information-20/#post-16419489)
 * Status: resolved