Title: PHP Warning: Undefined array key “HTTP_USER_AGENT”
Last modified: November 28, 2022

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# PHP Warning: Undefined array key “HTTP_USER_AGENT”

 *  [luxman](https://wordpress.org/support/users/luxman/)
 * (@luxman)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-http_user_agent-3/)
 * Server is running php 8.0
 * Following is within the debug.log
 * `PHP Warning: Undefined array key "HTTP_USER_AGENT" in /html/wp-content/plugins/
   zapier/zapier.php on line 176`

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 * 0 replies
 * 1 participant
 * Last reply from: [luxman](https://wordpress.org/support/users/luxman/)
 * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-http_user_agent-3/)
 * Status: not resolved