how to avoid this error in php?

[Selva ganesh Kumar]

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\s_modern_ecommerce\s1.php:150) in C:\xampp\htdocs\s_modern_ecommerce\cart.php on line 3

plzzz someone give me a sugession......

 

[ty H]

session_start() has to be on the first line of every page your going to use session in.

 

[khaleel]

Put this in header file.
ob_start();

 

[ty H]

session_start() has to be on the first line of every page your going to use session in.

 

[khaleel]

Put this in header file.
ob_start();