Title: Undefined index: proxy_client_headers
Last modified: May 14, 2021

---

# Undefined index: proxy_client_headers

 *  Resolved [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years ago](https://wordpress.org/support/topic/undefined-index-proxy_client_headers/)
 * Hi,
 * Not sure if this is an issue with the plugin or Matomo.
 * In my server logs, I see a lot of warnings.
 *     ```
       type	
       E_NOTICE (8)
       info	
       Undefined index: proxy_client_headers
       file	
       /home/user/public_html/matomo/core/IP.php
       line	
       49
       ```
   
 * It seems to coincide with doing a GET request with query parameters, e.g.
 * `example.org/?some=argument`
 * Everything stills seems to work though, but it would be nice if there are isset()
   checks to avoid the warnings?

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

 *  Plugin Author [braekling](https://wordpress.org/support/users/braekling/)
 * (@braekling)
 * [5 years ago](https://wordpress.org/support/topic/undefined-index-proxy_client_headers/#post-14437671)
 * `/home/user/public_html/matomo/core/IP.php` is part of Matomo’s core, so please
   contact the Matomo team or community about this issue, e.g., here: [https://forum.matomo.org](https://forum.matomo.org)
 *  Thread Starter [luminsol](https://wordpress.org/support/users/luminsol/)
 * (@luminsol)
 * [5 years ago](https://wordpress.org/support/topic/undefined-index-proxy_client_headers/#post-14437683)
 * Ok thanks, will do so.

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

The topic ‘Undefined index: proxy_client_headers’ is closed to new replies.

 * ![](https://ps.w.org/wp-piwik/assets/icon-256x256.png?rev=3529668)
 * [Connect Matomo - Analytics Dashboard for WordPress](https://wordpress.org/plugins/wp-piwik/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-piwik/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-piwik/)
 * [Active Topics](https://wordpress.org/support/plugin/wp-piwik/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-piwik/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wp-piwik/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [luminsol](https://wordpress.org/support/users/luminsol/)
 * Last activity: [5 years ago](https://wordpress.org/support/topic/undefined-index-proxy_client_headers/#post-14437683)
 * Status: resolved