Title: Cannot modify header warning
Last modified: August 22, 2016

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# Cannot modify header warning

 *  Resolved [soccergrl](https://wordpress.org/support/users/soccergrl/)
 * (@soccergrl)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-warning-4/)
 * I’m now suddenly getting this warning and can’t login to the admin backend anymore.
   Read NUMEROUS posts on this forum about this warning and simply cannot figure
   this thing out. I’ve checked the files for whitespace, in this case it’s complaining
   about my_functions.php on line 1 and pluggable.php.
 * My site has been working for months and I just received this warning today. The
   only edit I made was to the end of my_functions.php definitely not line 1. And
   then I tried deleting a plugin and when it asked if I wanted to delete all files
   and I clicked yes, this warning appeared and i couldn’t delete all the files.
   I then looked for the files on via FTP and none of them were there. Any help?
   Please!

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 *  Thread Starter [soccergrl](https://wordpress.org/support/users/soccergrl/)
 * (@soccergrl)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-warning-4/page/2/#post-5669385)
 * So far I’m not having the same problem, so all looks good!
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-warning-4/page/2/#post-5669386)
 * Excellent, I’m glad it’s working! 🙂

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The topic ‘Cannot modify header warning’ is closed to new replies.

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 17 replies
 * 3 participants
 * Last reply from: [James Huff](https://wordpress.org/support/users/macmanx/)
 * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/cannot-modify-header-warning-4/page/2/#post-5669386)
 * Status: resolved

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