Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at [duplicate]

Answer 1

1) Write ob_start(); at the top of your code,i.e., after and before session_start();

Also, write ob_flush(); at the end of the code,i.e., before ?>

This will help you for the warning, Warning: session_start()....

2) Whitespace is any unwanted space in the code, especially before and after php tags and ?>