Title: “Cannot Modify Header Information” when posting
Last modified: August 18, 2016

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# “Cannot Modify Header Information” when posting

 *  [phildennison](https://wordpress.org/support/users/phildennison/)
 * (@phildennison)
 * [22 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-when-posting/)
 * I installed 1.2 Mingus last night, and while my blog looks fine and takes new
   posts, I get a lot of these “Cannot Modify Header Information” errors. The latest,
   when I submit a new post, reads:
    `Warning: Cannot modify header information -
   headers already sent by (output started at /home/phildenn/public_html/wp-content/
   plugins/updatelinkroll.php:25) in /home/phildenn/public_html/wp-admin/post.php
   on line 146` For what it’s worth, lines 143 – 146 of post.php are: ` if ( '' !
   = $_POST['advanced'] || isset($_POST['save']) ) $location = "post.php?action=
   edit&post=$post_ID"; header("Location: $location"); // Send user on their way
   while we keep working I don’t see any of the blank lines before or after <?php
   or ?> that are supposed to be part of the problem. Any suggestions?

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

 *  [Mark (podz)](https://wordpress.org/support/users/podz/)
 * (@podz)
 * [22 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-when-posting/#post-57840)
 * Check this file – updatelinkroll.php – for any extra whitespace.
    It’s extra 
   whitespace outside of the <?php or ?> which causes this error message.
 *  Thread Starter [phildennison](https://wordpress.org/support/users/phildennison/)
 * (@phildennison)
 * [22 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-when-posting/#post-57856)
 * Bingo! Thanks for the assist. I was looking through all the other php files for
   whitespace, rather than the updatelinkroll.php.

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

The topic ‘“Cannot Modify Header Information” when posting’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [phildennison](https://wordpress.org/support/users/phildennison/)
 * Last activity: [22 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-when-posting/#post-57856)
 * Status: not resolved

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