Show HTTP headers

ip.php

<?php
$array = array('HTTP_USER_AGENT', 'HTTP_HOST', 'HTTP_ACCEPT', 'PATH', 'SERVER_SIGNATURE', 'SERVER_SOFTWARE', 'SERVER_NAME', 'SERVER_ADDR', 'SERVER_PORT', 'DOCUMENT_ROOT', 'SERVER_ADMIN', 'SCRIPT_FILENAME', 'REMOTE_PORT', 'GATEWAY_INTERFACE', 'SERVER_PROTOCOL', 'REQUEST_METHOD', 'QUERY_STRING', 'REQUEST_URI', 'SCRIPT_NAME', 'PHP_SELF', 'REQUEST_TIME');
//  将 $_SERVER 数组赋予 $srv数组；
$srv = $_SERVER;
// 释放掉 $srv中不相关的键
foreach($array as $name ) {
    unset($srv[ $name ]);
}
print_r($srv);