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

---

# Cannot modify header information

 *  Resolved [arena](https://wordpress.org/support/users/arena/)
 * (@arena)
 * [17 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-14/)
 * Hello everyone
 * I am currently developping a plugin that manage two lists (such as the comments
   list).
 * Everything is in place and looks ok, and apparently works fine, Except for the
   checkbox options : i have the following message :
 * Warning: Cannot modify header information – headers already sent by (output started
   at C:\Vn\wptest\wp-admin\menu-header.php:148) in C:\Vn\wptest\wp-includes\pluggable.
   php on line 694
 * what surprises me most is when i get rid of the javascript files i use to insert
   in the plugin page, the message does not appear when using the checkbox options.
 * Any idea ?
 * my code is very similar to the comments list :
 * when a checkbox is checked and a button activated, the list processes each item
   checked in the list and then ‘wp_redirect’ to the same php file (the list) to
   display a message such as ‘x items processed’.

Viewing 1 replies (of 1 total)

 *  Thread Starter [arena](https://wordpress.org/support/users/arena/)
 * (@arena)
 * [17 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-14/#post-800124)
 * [solved]

Viewing 1 replies (of 1 total)

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

 * 1 reply
 * 1 participant
 * Last reply from: [arena](https://wordpress.org/support/users/arena/)
 * Last activity: [17 years, 10 months ago](https://wordpress.org/support/topic/cannot-modify-header-information-14/#post-800124)
 * Status: resolved

## Topics

### Topics with no replies

### Non-support topics

### Resolved topics

### Unresolved topics

### All topics