php session problems when opening multiple window tabs

Question

I have a php page that starts with a session_start() and it stores the user info in the session variables. After that it goes either into (1) the long loop script does calcula

Answer 1

you dont need to do that,

when u call session_start(); a session is created and it is active until the timeout in php.ini or you call session_destroy();

your error is somewhere else, do you call session_start after echo or print?