questo errore:

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at g:\easyphp1-8\www\bacheca\index3.php:10) in g:\easyphp1-8\www\bacheca\index3.php on line 20

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at g:\easyphp1-8\www\bacheca\index3.php:10) in g:\easyphp1-8\www\bacheca\index3.php on line 20