Title: 'Cannot modify header information' Problem.
Last modified: August 20, 2016

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# 'Cannot modify header information' Problem.

 *  [uploa](https://wordpress.org/support/users/uploa/)
 * (@uploa)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/)
 * **Hi buddies,**
    I’m facing this problem for few days now. I went through the
   forums and searched, but I couldn’t find the solution for my problem. Thanks 
   for anyone who can help!
 * >  Warning: Cannot modify header information – headers already sent by (output
   > started at /home/wrestli2/public_html/wp-content/themes/custom-community/header.
   > php:3) in /home/wrestli2/public_html/wp-includes/pluggable.php on line 876

Viewing 9 replies - 1 through 9 (of 9 total)

 *  Thread Starter [uploa](https://wordpress.org/support/users/uploa/)
 * (@uploa)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376656)
 * By the way, I’m facing this problem only when I’m logged on.
 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376663)
 * Try reviewing [Solving “headers already sent” warnings](http://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
 *  Thread Starter [uploa](https://wordpress.org/support/users/uploa/)
 * (@uploa)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376749)
 * Thank you for you fast reply, but it doesn’t work.
    I’ve tried it before I posted.
 *  [esmi](https://wordpress.org/support/users/esmi/)
 * (@esmi)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376750)
 * What exactly did you do?
 *  [jpantone](https://wordpress.org/support/users/jpantone/)
 * (@jpantone)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376819)
 * Also have a similar problem, getting
    Warning: Cannot modify header information–
   headers already sent by (output started at /home/content/39/7829339/html/wp-content/
   themes/twentyten/functions.php:1) in /home/content/39/7829339/html/wp-login.php
   on line 368
 * when attempting to login to my blog.
 * I cannot seem to find any such directories or files.
 *  [jpantone](https://wordpress.org/support/users/jpantone/)
 * (@jpantone)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376820)
 * Wow! Talk about obscure!
 * I managed to fix my problem by downloading (FTP) my twentyten/functions.php
    
   I then edited it with a text editor (GEDIT) and saw nothing wrong – however I
   suspected bad chars at the beginning of the file and/or near the end of the first
   line where there was a ?> <?php
 * I carefully placed my cursor at the end of the first line of the file and moved
   it left until it was to the left of the <?php
 * I then backspaced up to and including the > of the ?> and then re-added the >
   and pressed the enter – all that to be sure no non-printing chars were between
   the ?> and the <?php
 * I then went to the first line of the file, placed the cursor well into the line
   and backed up to the < of the <?php – I pressed enter, then used ctl-shift-home
   to select everyting in the file from there to the top. (Should have been nothing,
   but apparently it wasn’t) – i deleted the selected “spaces”.
 * saving the file and uploading (FTP) back over the previous twentyten/functions.
   php then going to the login page on my browser.
 * All is well.
 * Much of this foolishness could be avoided by using a text editor which would 
   show ALL characters, printing or otherwise.
 * tl;dr There were non-printing chars in the first line of my twentyten/functions.
   php
 * I did NOT put them there – never edited the file before – I have no idea how 
   they got there. Not happy about that.
 *  [mycupandchaucer](https://wordpress.org/support/users/mycupandchaucer/)
 * (@mycupandchaucer)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376823)
 * That process isn’t working for me and I’m still getting the error message. Any
   one else have any suggestions?
 *  [WPyogi](https://wordpress.org/support/users/wpyogi/)
 * (@wpyogi)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376824)
 * [@mycupandchaucer](https://wordpress.org/support/users/mycupandchaucer/) – please
   [start your own thread](http://wordpress.org/support/forum/how-to-and-troubleshooting#postform)
   and post the actual error you are getting — it shows which file has the problem—
   so that makes it easier for someone to help you fix it.
 *  [mycupandchaucer](https://wordpress.org/support/users/mycupandchaucer/)
 * (@mycupandchaucer)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376825)
 * Thanks – done: [http://wordpress.org/support/topic/cant-log-in-cannot-modify-header-information-problem?replies=1#post-3749610](http://wordpress.org/support/topic/cant-log-in-cannot-modify-header-information-problem?replies=1#post-3749610)

Viewing 9 replies - 1 through 9 (of 9 total)

The topic ‘'Cannot modify header information' Problem.’ is closed to new replies.

## Tags

 * [header](https://wordpress.org/support/topic-tag/header/)
 * [problem](https://wordpress.org/support/topic-tag/problem/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 9 replies
 * 5 participants
 * Last reply from: [mycupandchaucer](https://wordpress.org/support/users/mycupandchaucer/)
 * Last activity: [13 years, 4 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-problem/#post-3376825)
 * Status: not resolved

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