Title: Warning: Cannot modify header information error
Last modified: August 22, 2016

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# Warning: Cannot modify header information error

 *  [jaclynsuzann](https://wordpress.org/support/users/jaclynsuzann/)
 * (@jaclynsuzann)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-error-1/)
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home1/drdeb/public_html/wp-content/themes/thesis_185/custom/custom_functions.
   php:1
 * I realize from reading that it says to remove any whitespace, however, I do not
   see it, can someone help? Here is the .php code for custom_functions:
 * [Large code excerpt removed by moderator per [forum rules](https://codex.wordpress.org/Forum_Welcome#Posting_Code).
   Please use [the pastebin](http://wordpress.pastebin.com/) for all large code 
   excerpts. It works better anyway.]

Viewing 1 replies (of 1 total)

 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 3 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-error-1/#post-5680289)
 * You have unexpected whitespace (either a space or an entire line) on line 1 of
   the `/wp-content/themes/thesis_185/custom/custom_functions.php` file. See [this guide](https://codex.wordpress.org/FAQ_Troubleshooting#How_do_I_solve_the_Headers_already_sent_warning_problem.3F)
   for more info.
 * Alternatively, replacing the file with one from a fresh download may resolve 
   the issue.

Viewing 1 replies (of 1 total)

The topic ‘Warning: Cannot modify header information error’ 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/)
 * 1 reply
 * 2 participants
 * Last reply from: [James Huff](https://wordpress.org/support/users/macmanx/)
 * Last activity: [11 years, 3 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-error-1/#post-5680289)
 * Status: not resolved

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