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

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# Warning: Cannot modify header information

 *  [adivor](https://wordpress.org/support/users/adivor/)
 * (@adivor)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-31/)
 * In my php error log file i see many same error :
 * `2009-07-27 08:56:17.004 [NOTICE] [83.27.77.167:3861-2#APVH_xxxxxxxxxxxxxxx.com:
   lsapi] [STDERR] PHP Warning: Cannot modify header information - headers already
   sent by (output started at /home/programm/public_html/wp-content/plugins/simple-
   post-thumbnails/timthumb.php:273) in /home/programm/public_html/wp-content/plugins/
   simple-post-thumbnails/timthumb.php on line 633`
 * How repair?

Viewing 1 replies (of 1 total)

 *  [dor](https://wordpress.org/support/users/dor/)
 * (@dor)
 * [16 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-31/#post-1156062)
 * I guess some blank line has been output by `/home/programm/public_html/wp-content/
   plugins/simple-post-thumbnails/timthumb.php`, line 273.
 * Check that file, espessially for
 *     ```
       [... some staff..]
       ?>
   
       <?php
       [... some more staff ...]
       ```
   
 * That blank line may be a problem, hope this helps.

Viewing 1 replies (of 1 total)

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

 * 1 reply
 * 2 participants
 * Last reply from: [dor](https://wordpress.org/support/users/dor/)
 * Last activity: [16 years, 11 months ago](https://wordpress.org/support/topic/warning-cannot-modify-header-information-31/#post-1156062)
 * Status: not resolved

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