Title: PHP Warning: Cannot modify header
Last modified: July 9, 2019

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# PHP Warning: Cannot modify header

 *  Resolved [tiicaa](https://wordpress.org/support/users/tiicaa/)
 * (@tiicaa)
 * [6 years, 11 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header/)
 * How to solve the problem? – I am getting log error of type:
 * `[09-Jul-2019 16:42:39 UTC] PHP Warning: Cannot modify header information - headers
   already sent by (output started at /public_html/wp-content/plugins/google-sitemap-
   plugin/google-sitemap-plugin.php:551)`

Viewing 1 replies (of 1 total)

 *  Plugin Author [bestwebsoft](https://wordpress.org/support/users/bestwebsoft/)
 * (@bestwebsoft)
 * [6 years, 10 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header/#post-11733087)
 * Hi,
 * Thank you for contacting us!
 * Unfortunately, we cannot reproduce this problem on our local environment. Please
   provide the access credentials to your WordPress admin dashboard (with Administrator’s
   permissions) and the FTP credentials (host, username, and password), in order
   to detect the reason and find the solution.
 * During making tests we’ll probably deactivate some of your plugins or switch 
   the theme. That’s why before giving the access, we recommend you to make a full
   backup of your site.
 * **Since this data is confidential, maybe, it would be better if you create a 
   private ticket on our support forum ([https://support.bestwebsoft.com/hc/en-us/requests/new](https://support.bestwebsoft.com/hc/en-us/requests/new)).
   Please include a link to this post, so that we could recall the case immediately.**

Viewing 1 replies (of 1 total)

The topic ‘PHP Warning: Cannot modify header’ is closed to new replies.

 * ![](https://ps.w.org/google-sitemap-plugin/assets/icon-256x256.gif?rev=2582517)
 * [Sitemap by BestWebSoft - WordPress XML Site Map Page Generator Plugin](https://wordpress.org/plugins/google-sitemap-plugin/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/google-sitemap-plugin/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/google-sitemap-plugin/)
 * [Active Topics](https://wordpress.org/support/plugin/google-sitemap-plugin/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/google-sitemap-plugin/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/google-sitemap-plugin/reviews/)

 * 1 reply
 * 2 participants
 * Last reply from: [bestwebsoft](https://wordpress.org/support/users/bestwebsoft/)
 * Last activity: [6 years, 10 months ago](https://wordpress.org/support/topic/php-warning-cannot-modify-header/#post-11733087)
 * Status: resolved