Title: PHP Warning
Last modified: December 29, 2019

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# PHP Warning

 *  Resolved [John](https://wordpress.org/support/users/jemoreto/)
 * (@jemoreto)
 * [6 years, 5 months ago](https://wordpress.org/support/topic/php-warning-221/)
 * Hello guys! How’re you doing?
 * Please, I’m getting hundreds of PHP Warnings in debug.log:
 * [29-Dec-2019 13:49:07 UTC] PHP Warning: Cannot modify header information – headers
   already sent in …/public_html/wp-content/plugins/handl-utm-grabber/handl-utm-
   grabber.php on line 52
 * Does anyone here already experienced this?
 * WordPress 5.3.2. Multisite installation. Hosted on Cloudways.com (Amazon server).
   
   HandL UTM Grabber version 2.7.1.
 * Thank you!!

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

 *  [citywanderer](https://wordpress.org/support/users/citywanderer/)
 * (@citywanderer)
 * [6 years, 5 months ago](https://wordpress.org/support/topic/php-warning-221/#post-12283961)
 * Hey! Any movement on this? The warnings are filling up my logs too
 *  Plugin Author [Haktan Suren](https://wordpress.org/support/users/haktansuren/)
 * (@haktansuren)
 * [6 years, 4 months ago](https://wordpress.org/support/topic/php-warning-221/#post-12302411)
 * Hi [@jemoreto](https://wordpress.org/support/users/jemoreto/) ,
 * you should not see such errors in normal scenario. I think there is either other
   pluginor your theme might be causing this unexpected warning. For setting the
   cookie, plugin is using init hook. By the definition ([https://developer.wordpress.org/reference/hooks/init/](https://developer.wordpress.org/reference/hooks/init/)),
   there should be no other headers sent/printed before this hook in a good practice.
   But apparently, in your case, something gets printed before the init hook. I 
   recommend you to disable the plugins one by one to find out what causing it. 
   Or try switching the theme as well.
 * [@citywanderer](https://wordpress.org/support/users/citywanderer/) please see
   the answer as well.

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

The topic ‘PHP Warning’ is closed to new replies.

 * ![](https://ps.w.org/handl-utm-grabber/assets/icon-256x256.png?rev=2817979)
 * [HandL UTM Grabber / Tracker](https://wordpress.org/plugins/handl-utm-grabber/)
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 * 2 replies
 * 3 participants
 * Last reply from: [Haktan Suren](https://wordpress.org/support/users/haktansuren/)
 * Last activity: [6 years, 4 months ago](https://wordpress.org/support/topic/php-warning-221/#post-12302411)
 * Status: resolved