Title: Undefined index: HTTP_REFERER
Last modified: August 30, 2016

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# Undefined index: HTTP_REFERER

 *  Resolved [4ntr4xvini](https://wordpress.org/support/users/4ntr4xvini/)
 * (@4ntr4xvini)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/undefined-index-http_referer-1/)
 * Im getting the follow message:
 * Notice: Undefined index: HTTP_REFERER in /public_html/wp-content/plugins/chimpmate/
   public/class-chimpmate-wpmc-assistant.php on line 509
 * What’s wrong?
 * [https://wordpress.org/plugins/chimpmate/](https://wordpress.org/plugins/chimpmate/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Voltroid](https://wordpress.org/support/users/voltroid/)
 * (@voltroid)
 * [10 years, 6 months ago](https://wordpress.org/support/topic/undefined-index-http_referer-1/#post-6655282)
 * Hi 4ntr4xvini,
 * Add the following
    before Line 509 of file chimpmate/public/class-chimpmate-wpmc-
   assistant.php
 * if(!isset($_SERVER[“HTTP_REFERER”]))return true;
 * Thank you,
    Your friends at Voltroid

Viewing 1 replies (of 1 total)

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

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 * 1 reply
 * 2 participants
 * Last reply from: [Voltroid](https://wordpress.org/support/users/voltroid/)
 * Last activity: [10 years, 6 months ago](https://wordpress.org/support/topic/undefined-index-http_referer-1/#post-6655282)
 * Status: resolved