Title: Warning: Cannot modify header information
Last modified: August 21, 2016

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# Warning: Cannot modify header information

 *  Resolved [echo405](https://wordpress.org/support/users/echo405/)
 * (@echo405)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/)
 * Hi,
 * I’m getting following message on my browser after I fix a posting or page.
    I
   happens after I update something. The symptom came after I tried to install slider
   plugin and it didn’t work, then it start the trouble.
 * Thanks.
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home/content/17/10798017/html/wp-content/themes/inovado/functions.php:1) 
   in /home/content/17/10798017/html/wp-includes/pluggable.php on line 876

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [Vignesh Pichamani](https://wordpress.org/support/users/viky081/)
 * (@viky081)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/#post-3781441)
 * Header already sent problem is happen by unwanted space in the php tag or they
   forgot to close the php tag i think this link will help to solve this issue [FAQ](http://codex.wordpress.org/FAQ_Troubleshooting)
 * Switch your theme to default theme and see if the same issue happen
 *  Thread Starter [echo405](https://wordpress.org/support/users/echo405/)
 * (@echo405)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/#post-3781447)
 * Well… as soon as I switch to it, it gives same message… when that happens the
   address bar shows “[http://fgholylight.org/wp-admin/post.php&#8221](http://fgholylight.org/wp-admin/post.php&#8221);
   and no matter what kind of update you do it will show the same error message.
   I’ve tried to update php file without space thing, but didn’t work.
    When I turn
   off all plugins, like 10 of them, then 10 lines of the same message appears on
   the browser…
 * Thanks.
 *  [Vignesh Pichamani](https://wordpress.org/support/users/viky081/)
 * (@viky081)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/#post-3781455)
 * How you switch the theme to 2012 ? through via admin or ftp. I think you are 
   not changing the theme to 2012 or else you just paste a code from functions.php
   of invado theme .
 *  Thread Starter [echo405](https://wordpress.org/support/users/echo405/)
 * (@echo405)
 * [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/#post-3781566)
 * All I had to do was uninstall premium theme which I was using, then re-install
   the same theme. That fixes it.
    Thanks.

Viewing 4 replies - 1 through 4 (of 4 total)

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

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 4 replies
 * 2 participants
 * Last reply from: [echo405](https://wordpress.org/support/users/echo405/)
 * Last activity: [12 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-107/#post-3781566)
 * Status: resolved

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