PHP采用301跳转方式防CC拦截

PHP采用301跳转方式防CC拦截   降低CC攻击的效果

<?php empty($_SERVER['HTTP_VIA']) or exit('Access Denied'); $seconds = 10; //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){ //跳转验证 $url='http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; $msg=mb_convert_encoding("<title>安全检查</title><h3>检测到CC攻击，正在进行浏览器安全检查！</h3>","UTF-8","GBK"); exit($msg."<meta http-equiv='refresh' content='5;url={$url}'>");//5是定时跳转的时间，后期可以根据时间段调整跳转时间 } }else{ $_SESSION['refresh_times'] = 0; $_SESSION['last_time'] = $cur_time; } ?>