Cannot send session cache limiter

PHP
1

How to solve this problem?

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\\xampp\\htdocs\\jpw\\admin\\admin.php:5) in C:\\xampp\\htdocs\\jpw\\inc\\header.php on line 4
2

thanks, it works now

3

Don’t create any output before session_start.
That’s why you should put session_start at the top of your script.

And beware, even an empty line or a space before the opening <?php tag of your script is output.