"Cannot modify header information" [#18457]

After I got gallery.module up and running with G2 beta (dark fiber), I started getting these errors everytime I would save a setting, make a change in Drupal, or someone would add a comment:

warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/data-dist/stevesgallery.com/modules/gallery.module:325) in /usr/local/www/data-dist/stevesgallery.com/includes/common.inc on line 155.

Drupal 4.5.2

Comments

Comment #1

(not verified) CreditAttribution: commented 27 March 2005 at 08:13

Check for empty lines in your gallery.module file outside of the <?php tags. If the gallery.module php file writes anything out, you will get this behavior.

Comment #2

(not verified) CreditAttribution: commented 27 March 2005 at 08:14

Opps it ate my tags. I was saying, check for empty lines, spaces, or text outside of the PHP code tags. Typically an empty line at the end or beginning of the gallery.module file will cause this.