Title: Warning in phperrors.php
Last modified: January 2, 2022

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# Warning in phperrors.php

 *  Resolved [The Servant](https://wordpress.org/support/users/avantprime/)
 * (@avantprime)
 * [4 years, 5 months ago](https://wordpress.org/support/topic/warning-in-phperrors-php/)
 * [02-Jan-2022 15:32:49 UTC] PHP Warning: Undefined array key “trace” in […]\wp-
   content\plugins\query-monitor\output\headers\php_errors.php on line 43

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

 *  Plugin Author [John Blackbourn](https://wordpress.org/support/users/johnbillion/)
 * (@johnbillion)
 * WordPress Core Developer
 * [4 years, 5 months ago](https://wordpress.org/support/topic/warning-in-phperrors-php/#post-15212285)
 * Thanks. This should have been fixed in version 3.8.1. Can you check that you’re
   on the latest version?
 *  Thread Starter [The Servant](https://wordpress.org/support/users/avantprime/)
 * (@avantprime)
 * [4 years, 5 months ago](https://wordpress.org/support/topic/warning-in-phperrors-php/#post-15212300)
 * I upgraded right after finding that error in the PHP logs on the server.
 * Windows server running IIS 10 & PHP 8 FYI.
 * Monitoring and will get back to you later or tomorrow with the results.
 *  Thread Starter [The Servant](https://wordpress.org/support/users/avantprime/)
 * (@avantprime)
 * [4 years, 5 months ago](https://wordpress.org/support/topic/warning-in-phperrors-php/#post-15214584)
 * No recurrence after recycling the app pool. You are good–no problems.

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

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## Tags

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

 * 3 replies
 * 2 participants
 * Last reply from: [The Servant](https://wordpress.org/support/users/avantprime/)
 * Last activity: [4 years, 5 months ago](https://wordpress.org/support/topic/warning-in-phperrors-php/#post-15214584)
 * Status: resolved