This is the error message I'm getting. I built my own theme and it pulls in a bunch of files with functions.php
Warning: Cannot modify header information - headers already sent by (output started at /home3/keganqui/public_html/dev/wp-content/themes/optimus/functions.php:5) in /home3/keganqui/public_html/dev/wp-includes/pluggable.php on line 866
new functions.php file, but the same error message occurs:
<?php require(TEMPLATEPATH . '/inc/misc.php'); ?>
<?php require(TEMPLATEPATH . '/inc/widgets.php'); ?>
<?php require(TEMPLATEPATH . '/inc/homepage.php'); ?>
<?php
/* Include back-end */
if(is_admin()){ include TEMPLATEPATH.'/panel/panel.php'; }
/* Include front-end */
if(!is_admin()){ include TEMPLATEPATH.'/panel/panel-front.php'; }
?>
Chances are you have white space before your <?php tag. But as toscho said, please update your question with the first lines of functions.php
UPDATE
your functions file should be like this:
<?php
require(TEMPLATEPATH . '/inc/misc.php');
require(TEMPLATEPATH . '/inc/widgets.php');
require(TEMPLATEPATH . '/inc/homepage.php');
/* Include back-end */
if(is_admin()){ include TEMPLATEPATH.'/panel/panel.php'; }
/* Include front-end */
if(!is_admin()){ include TEMPLATEPATH.'/panel/panel-front.php'; }
?>
You must have only once your session_start() right after your opening php tag .
If you have a main page and include in files with functions e.t.c dont put again the session_start() in those files. Just have one session_start at your main php file
