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

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# Cannot modify header information

 *  [mediasky](https://wordpress.org/support/users/mediasky/)
 * (@mediasky)
 * [16 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-34/)
 * Does any one know what this means?
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home4/jackfisc/public_html/wp-config.php:159) in /home4/jackfisc/public_html/
   wp-includes/pluggable.php on line 868

Viewing 1 replies (of 1 total)

 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [16 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-34/#post-1492175)
 * You have unexpected white space (either a single space or an entire line) on 
   line 159 of the `wp-config.php` file. See this for more info:
 * [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)

Viewing 1 replies (of 1 total)

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

 * 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: [16 years ago](https://wordpress.org/support/topic/cannot-modify-header-information-34/#post-1492175)
 * Status: not resolved

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