Title: Undefined array key “HTTP_USER_AGENT”
Last modified: September 8, 2025

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# Undefined array key “HTTP_USER_AGENT”

 *  Resolved [dmac](https://wordpress.org/support/users/darrenmcentee/)
 * (@darrenmcentee)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-http_user_agent-5/)
 * Hi, getting this output every few seconds in the error_log. Can you advise please?
   
   Thank you,Darren.
 *     ```wp-block-code
       [08-Sep-2025 16:42:24 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:26 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:28 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:30 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:31 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:33 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:35 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:37 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:39 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:41 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:43 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156[08-Sep-2025 16:42:45 UTC] PHP Warning:  Undefined array key "HTTP_USER_AGENT" in /home/xyz/public_html/wp-content/plugins/woo-quick-view/classes/class.backend.php on line 156
       ```
   

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

 *  Plugin Support [Pulak Ahmed](https://wordpress.org/support/users/pulak00/)
 * (@pulak00)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-http_user_agent-5/#post-18633852)
 * Hi [@darrenmcentee](https://wordpress.org/support/users/darrenmcentee/),
 * Thank you for reaching out. The error you mentioned (**“Undefined array key ‘
   HTTP_USER_AGENT'”**) is not generated from our **Quick View for WooCommerce**
   plugin by ShapedPlugin. It seems to be coming from a different plugin, which 
   is: [https://wordpress.org/plugins/woo-quick-view/](https://wordpress.org/plugins/woo-quick-view/)
 * We recommend contacting the correct plugin author through the WordPress.org support
   forum of that plugin to resolve the issue.
 * If you have any questions or need assistance regarding **Quick View for WooCommerce(
   by ShapedPlugin)**, please feel free to let us know—we’ll be happy to help.
 * Thank You,
 *  Thread Starter [dmac](https://wordpress.org/support/users/darrenmcentee/)
 * (@darrenmcentee)
 * [7 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-http_user_agent-5/#post-18634156)
 * Sorry about that, very similar plugin URL. Thanks.

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

The topic ‘Undefined array key “HTTP_USER_AGENT”’ is closed to new replies.

 * ![](https://ps.w.org/woo-quickview/assets/icon-256x256.png?rev=2825603)
 * [Quick View for WooCommerce](https://wordpress.org/plugins/woo-quickview/)
 * [Support Threads](https://wordpress.org/support/plugin/woo-quickview/)
 * [Active Topics](https://wordpress.org/support/plugin/woo-quickview/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/woo-quickview/unresolved/)
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 * 2 replies
 * 2 participants
 * Last reply from: [dmac](https://wordpress.org/support/users/darrenmcentee/)
 * Last activity: [7 months, 1 week ago](https://wordpress.org/support/topic/undefined-array-key-http_user_agent-5/#post-18634156)
 * Status: resolved