use of ob_end_clean(); and exit();

[Jayram121]

if (!isset($_SESSION['user'])) {

	header("Location: login.php");

ob_end_clean();

exit;

}

1. Do I need to use ob_end_clean(); and exit(); to gether.

2. I could not understand of the purpose of ob_end_clean();

[requinix]

1. No.

2. ob_end_clean If you have output buffering enabled then this will end one of them (not all, in case you have more than one active) without outputting anything.