we have been create session and register three variable name of variable is session_user_mail,session_password,session_order_no when user login.we try to destroy the register variable using the PHP script which one write below.but the session was not destroy please correct that code.
<?php
session_save_path("../temp//");//server path
session_start();
session_unregister('$session_user_mail');
session_unregister('$session_password');
session_unregister('$session_order_no');
if(session_destroy())
echo "session destroy";
?>