<?php //代理IP直接退出 empty($_SERVER['HTTP_VIA']) or exit('Access Denied'); //防止快速刷新 session_start(); $seconds = '3'; //时间段[秒] $refresh = '5'; //刷新次数 //设置监控变量 $cur_time = time(); if(isset($_SESSION['last_time'])){  $_SESSION['refresh_times'] += 1; }else{  $_SESSION['refresh_times'] = 1;  $_SESSION['last_time'] = $cur_time; } //处理监控结果 if($cur_time - $_SESSION['last_time'] < $seconds){  if($_SESSION['refresh_times'] >= $refresh){   //跳转至攻击者服务器地址   header(sprintf('Location:%s', 'http://127.0.0.1'));   exit('Access Denied');  } }else{  $_SESSION['refresh_times'] = 0;  $_SESSION['last_time'] = $cur_time; } ?>