Title: Cannot modify header information
Last modified: August 19, 2016

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# Cannot modify header information

 *  [Nilreb](https://wordpress.org/support/users/nilreb/)
 * (@nilreb)
 * [15 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-38/)
 * Keep getting locked out and geting this message
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/home/public_html/wp-content/themes/city_life/functions.php:547) in /
   home/home/public_html/wp-includes/pluggable.php on line 890
 * Web site is HomeSearchLondon.com
 * Anyone help

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

 *  [Rev. Voodoo](https://wordpress.org/support/users/rvoodoo/)
 * (@rvoodoo)
 * [15 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-38/#post-1619073)
 * sounds like blank lines before or after a `<?php` or `?>` possibly in your theme’s
   functions.php file
 * the very first line needs to be `<?php` no blank spaces or lines before
 * the very last line needs to be `?>` no blank spaces or lines after
 * If you close and open a php in the functions.php, no blank lines in between, 
   this was my problem. I had:
 *     ```
       code
       ?>
       blank line
       <?php
       code
       ```
   
 * removing that blank line helped me
 *  Thread Starter [Nilreb](https://wordpress.org/support/users/nilreb/)
 * (@nilreb)
 * [15 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-38/#post-1619079)
 * ok great thanks will give that a try..

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

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

## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [Nilreb](https://wordpress.org/support/users/nilreb/)
 * Last activity: [15 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-38/#post-1619079)
 * Status: not resolved

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