1<?php
2
3var_dump(isset($_SERVER));
4var_dump(empty($_SERVER));
5var_dump(gettype($_SERVER));
6var_dump(count($_SERVER));
7
8var_dump($_SERVER['PHP_SELF']);
9unset($_SERVER['PHP_SELF']);
10var_dump($_SERVER['PHP_SELF']);
11
12unset($_SERVER);
13var_dump($_SERVER);
14
15?>
16
