Title: HTTP_USER_AGENT PHP Notice:
Last modified: August 31, 2016

---

# HTTP_USER_AGENT PHP Notice:

 *  [trex005](https://wordpress.org/support/users/trex005/)
 * (@trex005)
 * [10 years, 1 month ago](https://wordpress.org/support/topic/http_user_agent-php-notice/)
 * I turned on my debug log today right away it filled up with thousands upon thousands
   of the following :
 * **PHP Notice: Undefined index: HTTP_USER_AGENT in /home/lancast/public_html/wp-
   content/plugins/twitter-facebook-google-plusone-share/tf_display.php on line 
   432**
 * And again on lines 434, 436, 438, 440, 442, 444, 446 and 448
 * I’m guessing something is crawling my site that does not have it’s user agent
   set.
 * It is a VERY easy fix, all you have to do is put
 *     ```
       if(empty($_SERVER['HTTP_USER_AGENT']))
            return false;
       ```
   
 * Above line 432.
 * I have completed this update on my server, but it would be nice if it didn’t 
   break again when I updated! Thank you!
 * [https://wordpress.org/plugins/twitter-facebook-google-plusone-share/](https://wordpress.org/plugins/twitter-facebook-google-plusone-share/)

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## Tags

 * [error_log](https://wordpress.org/support/topic-tag/error_log/)
 * [HTTP_USER_AGENT](https://wordpress.org/support/topic-tag/http_user_agent/)
 * [PHP Notice](https://wordpress.org/support/topic-tag/php-notice/)

 * 0 replies
 * 1 participant
 * Last reply from: [trex005](https://wordpress.org/support/users/trex005/)
 * Last activity: [10 years, 1 month ago](https://wordpress.org/support/topic/http_user_agent-php-notice/)
 * Status: not resolved