Question

Possible Duplicate:
PHP headers already sent

So I just joined Hostgator.com, and was wondering, why do I always get this error:

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/kapip/public_html/main/mainpage.php:5) in /home/kapip/public_html/main/mainpage.php on line 7

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/kapip/public_html/main/mainpage.php:5) in /home/kapip/public_html/main/mainpage.php on line 7

What does this mean? I know I have to probably edit the php.ini, but I’m not sure what to change. Can anyone help me out? Thank you!

Answer 1

Make sure you don’t have any whitespace or anything else displayed before you do session_start() e.g.

// whitespace, any mark up or include that displays something <HERE>
// it will give you that error
<?php
session_start();