Title: Cannot Modify Header
Last modified: August 30, 2016

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# Cannot Modify Header

 *  [jjpecoro](https://wordpress.org/support/users/jjpecoro/)
 * (@jjpecoro)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/)
 * So I am getting the below message on my admin login screen which is preventing
   me to get into wordpress. I went to my FTP page and changed the name of my plugin
   folder to plugin.hold (which I think disables all of the plugins) and that did
   not fix the problem. I read some other articles about changing some of the code
   from the post.php file. I downloaded the file and scrolled all the way to the
   end of the 6000+ lines (using google notepad) and there was no ?>. Am I correct
   in assuming that I need to add that code to the last line? I am confused because
   the error says post.php:1 which seems to be an error in line one not all the 
   way at the end.
 * **First 2 lines:**
    <?php /**
 * **Last 2 lines:**
    } } (with a blank line at the very end)
 * **Login Error message:**
    Warning: Cannot modify header information – headers
   already sent by (output started at /home/readingedge/public_html/sa/wp-includes/
   post.php:1) in /home/readingedge/public_html/sa/wp-login.php on line 431
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/readingedge/public_html/sa/wp-includes/post.php:1) in /home/readingedge/
   public_html/sa/wp-login.php on line 444
 * [http://readingedgeacademy.org/sa/wp-login.php](http://readingedgeacademy.org/sa/wp-login.php)

Viewing 5 replies - 1 through 5 (of 5 total)

 *  [codemovement.pk](https://wordpress.org/support/users/codemovementpk/)
 * (@codemovementpk)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648276)
 * Hi,
 * here is a link that may help you.
 * [http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
 *  Thread Starter [jjpecoro](https://wordpress.org/support/users/jjpecoro/)
 * (@jjpecoro)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648307)
 * Ok, so I did that and it seemed to let me log in but then took me to a white 
   page with this error:
 * Warning: require_once(/home/readingedge/public_html/sa/wp-admin/includes/post.
   php): failed to open stream: No such file or directory in /home/readingedge/public_html/
   sa/wp-admin/includes/admin.php on line 46
 * Fatal error: require_once(): Failed opening required ‘/home/readingedge/public_html/
   sa/wp-admin/includes/post.php’ (include_path=’.:/usr/local/lib/php’) in /home/
   readingedge/public_html/sa/wp-admin/includes/admin.php on line 46
 * When I view my website now I have the editor navigation buttons on the top but
   when I click edit, customize, dashboard, etc it will bring me back to the error
   screen.
 * Edit: the edit button brings me here for some reason:
    [http://readingedgeacademy.org/sa/wp-admin/post.php?post=462&action=edit](http://readingedgeacademy.org/sa/wp-admin/post.php?post=462&action=edit)
 *  Thread Starter [jjpecoro](https://wordpress.org/support/users/jjpecoro/)
 * (@jjpecoro)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648424)
 * Any suggestions on this new error I am getting?
 *  [a2ztechnologies](https://wordpress.org/support/users/a2ztechnologies/)
 * (@a2ztechnologies)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648426)
 * Deactive all plugin then check this issue
 * after active one by one
 *  Thread Starter [jjpecoro](https://wordpress.org/support/users/jjpecoro/)
 * (@jjpecoro)
 * [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648438)
 * It was not the pugins. This whole thing is a mess. I am now able to get into 
   my dashboard. I re-downloaded WordPress and simply found the post.php file under
   wp-admin/includes folder and uploaded it to my FTP file that it was missing from.
   I am not sure if that is something that I am supposed to do but it seemed to 
   work.
 * Now when I am in the Dashboard I can’t edit my pages. Each time I click on them
   it brings me to [http://readingedgeacademy.org/sa/wp-admin/post.php?post=609&action=edit](http://readingedgeacademy.org/sa/wp-admin/post.php?post=609&action=edit)
 * Any thoughts?

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Cannot Modify Header’ is closed to new replies.

## Tags

 * [cannot modify header](https://wordpress.org/support/topic-tag/cannot-modify-header/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 5 replies
 * 3 participants
 * Last reply from: [jjpecoro](https://wordpress.org/support/users/jjpecoro/)
 * Last activity: [10 years, 7 months ago](https://wordpress.org/support/topic/cannot-modify-header-6/#post-6648438)
 * Status: not resolved

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