Title: Modify header message error
Last modified: August 22, 2016

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# Modify header message error

 *  Resolved [win58](https://wordpress.org/support/users/win58/)
 * (@win58)
 * [11 years, 7 months ago](https://wordpress.org/support/topic/modify-header-message-error/)
 * Warning: Cannot modify header information – headers already sent by (output started
   at …………..wp-includes/option.php on line 750 and 751
 * Thanks, great plugin.
 * [https://wordpress.org/plugins/html-editor-syntax-highlighter/](https://wordpress.org/plugins/html-editor-syntax-highlighter/)

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

 *  [sfetchit](https://wordpress.org/support/users/sfetchit/)
 * (@sfetchit)
 * [11 years, 7 months ago](https://wordpress.org/support/topic/modify-header-message-error/#post-5380569)
 * There are characters in the main plugin php file ahead of the <?php that is not
   a BOM and causes a header to start being generated inappropriately.
 *  Thread Starter [win58](https://wordpress.org/support/users/win58/)
 * (@win58)
 * [11 years, 7 months ago](https://wordpress.org/support/topic/modify-header-message-error/#post-5380593)
 * Thanks. I’ll check it.

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

The topic ‘Modify header message error’ is closed to new replies.

 * ![](https://ps.w.org/html-editor-syntax-highlighter/assets/icon.svg?rev=2013780)
 * [HTML Editor Syntax Highlighter](https://wordpress.org/plugins/html-editor-syntax-highlighter/)
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 * 2 replies
 * 2 participants
 * Last reply from: [win58](https://wordpress.org/support/users/win58/)
 * Last activity: [11 years, 7 months ago](https://wordpress.org/support/topic/modify-header-message-error/#post-5380593)
 * Status: resolved