Title: ‘headers already sent’ errors
Last modified: June 11, 2026

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# ‘headers already sent’ errors

 *  Resolved [RS](https://wordpress.org/support/users/rsdotscot/)
 * (@rsdotscot)
 * [3 days, 6 hours ago](https://wordpress.org/support/topic/headers-already-sent-errors-4/)
 * Hi there,
 * Excellent job with the new version of the plugin.
 * There was an update just before you changed the name and it introduced a ‘headers
   already sent’ error which hasn’t been resolved with the new version.
 * Here’s a sample of the two errors I’m getting:
 * `[11-Jun-2026 21:27:53 Europe/London] PHP Warning: Cannot modify header information-
   headers already sent by (output started at /PATHTOPLUGIN/wp-disable/lib/class-
   wpperformance.php:660) in /PATHTOWP/wp-includes/rest-api/class-wp-rest-server.
   php on line 1921
   [11-Jun-2026 21:27:54 Europe/London] PHP Warning: Cannot modify
   header information - headers already sent by (output started at /PATHTOPLUGIN/
   wp-disable/lib/class-wpperformance.php:660) in /PATHTOWP/wp-includes/pluggable.
   php on line 1535
 * Any ideas?
 * Cheers,
   RS

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

 *  Plugin Author [jody nesbitt](https://wordpress.org/support/users/pigeonhut/)
 * (@pigeonhut)
 * [2 days, 21 hours ago](https://wordpress.org/support/topic/headers-already-sent-errors-4/#post-18936124)
 * thank you, it took a minute 🙂
 * ill get a fix posted today for this, thanks for the heads
 *  Plugin Author [jody nesbitt](https://wordpress.org/support/users/pigeonhut/)
 * (@pigeonhut)
 * [2 days, 19 hours ago](https://wordpress.org/support/topic/headers-already-sent-errors-4/#post-18936188)
 * issue resolved, plugin in an update queue, you should see it tomorrow
 * Version `2.2.2` will be released to sites in about 24 hours. WordPress.org currently
   delays plugin updates by 24 hours so moderators and security scanners can review
   changes before they reach users.

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

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## Tags

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

 * 3 replies
 * 2 participants
 * Last reply from: [jody nesbitt](https://wordpress.org/support/users/pigeonhut/)
 * Last activity: [2 days, 19 hours ago](https://wordpress.org/support/topic/headers-already-sent-errors-4/#post-18936188)
 * Status: resolved