Title: Plugin, WITHOUT White Space, Creates Header Error. Baffled
Last modified: August 19, 2016

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# Plugin, WITHOUT White Space, Creates Header Error. Baffled

 *  [kpb](https://wordpress.org/support/users/kpb/)
 * (@kpb)
 * [17 years, 7 months ago](https://wordpress.org/support/topic/plugin-without-white-space-creates-header-error-baffled/)
 * Hey,
 * I know that whitespace/etc can cause header errors. But my code
    simply doesn’t
   have any. The error is listed when I try to make a new post:
 * > Cannot modify header information – headers already sent by (output started 
   > at /home/wwwulti/public_html/blog/wp-content/plugins/catbocker/catblocker.php:
   > 1 in /home/wwwulti/public_html/blog/wp-includes/classes.php on line 806
 * I know there is no trailing space/whitespace. What other factors could cause 
   this and how can one prevent it? I swear, I am doing my best to search for an
   answer but I cannot afford to lose a day of production on this. Hopefully somebody
   else experienced this too.
 * TY for your time.

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## Tags

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 0 replies
 * 1 participant
 * Last reply from: [kpb](https://wordpress.org/support/users/kpb/)
 * Last activity: [17 years, 7 months ago](https://wordpress.org/support/topic/plugin-without-white-space-creates-header-error-baffled/)
 * Status: not resolved

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