Error when trying to use session_start() in a lightbox

PHP
1

My webpage has session_start(); in it. On this page I have a link to a popup window. I want the code for this popup window to also utilize session_start(), so that I can read some session variables, but when I include it I get the following error:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home3/recordau/public_html/searchPopup.php:11) in /home3/recordau/public_html/searchPopup.php on line 13

So what is the best way to display session variables if I am not permitted to initiate the session in this popup window?

Thank you.

2

session_start() should be the first line of php code. I see, from the error, you have it at line 13. If you call session_start() after any output (even a blank space), then you will get the error.