";
//PHP 4 write to a temporary file in default directory /tmp
//unless we specify otherwise in session_save_path();
session_register('test');
$_SESSION['test'] = 5;
print $_SESSION['test']."
";
session_unset(); //immediately remove all registered variables
session_destroy(); //end a session
print $_SESSION['test']; //prints nothing
print session_id(); //prints nothing
?>