该防红代码源自「消失的彩虹海」V2.5 版本，适配绝大多数 PHP 网站源码。本人做小幅修改优化；无法实现 100% 永久防红，仅可起到一定防护作用，降低域名被腾讯检测报毒概率。
功能特点
01、代码精简轻量化，部署便捷
02、针对腾讯网址安全检测爬虫做特征拦截
03、内置爬虫 IP 段屏蔽、UA 特征识别双重拦截机制
04、微信 / QQ 内置浏览器访问自动展示引导页，提示使用外部浏览器打开

源码：

<?php
$conf['qqjump']=1;
if(strpos($_SERVER['HTTP_USER_AGENT'], 'QQ/')||strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger')!==false && $conf['qqjump']==1)
{
  $siteurl='http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
  echo '<html> <head> <meta charset="UTF-8">
  <title>请使用浏览器打开</title>
  <meta content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport">
  <meta content="yes" name="apple-mobile-web-app-capable">
  <meta content="black" name="apple-mobile-web-app-status-bar-style">
  <meta name="format-detection" content="telephone=no">
  <meta content="false" name="twcClient" id="twcClient">
  <meta name="aplus-touch" content="1">
<style>.tips img{width:100%;height:auto}html,body,p,ol,ul,li,dl,dt,dd,blockquote,figure,fieldset,legend,textarea,pre,iframe,hr,h1,h2,h3,h4,h5,h6{margin:0;padding:0}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal}ul{list-style:none}button,input,select,textarea{margin:0}html{box-sizing:border-box}*,*:before,*:after{box-sizing:inherit}img,video{height:auto;max-width:100%}iframe{border:0}table{border-collapse:collapse;border-spacing:0}td,th{padding:0;text-align:left}</style></head>
<body><div class="tips" ><img src="https://external-30160.picsz.qpic.cn/9b9cbd00219647d885d3876dc50095da" alt="引导页" />
</div>
</body>
</html>';
exit;
/*
反腾讯网址安全检测系统
Description:屏蔽腾讯电脑管家网址安全检测
Version:2.5
Author:消失的彩虹海
*/
if($nosecu==true)return;
//IP 屏蔽
$iptables='977012992~977013247|977084416~977084927|1743654912~1743655935|1949957632~1949958143|2006126336~2006127359|2111446272~2111446527|3418570752~3418578943|3419242496~3419250687|3419250688~3419275263|3682941952~3682942207|3682942464~3682942719|3682986660~3682986663|1707474944~1707606015|1884967642|1884967620|1893733510|1709332858|1709318620|1709325774|1709342057|1709341968|1709330358|1709335492|1709327575|1709327041|1709318626|1709318617|1709327557|1709327573|1975065457|1902908741|1902908705|3029946827';
$remoteiplong=bindec(decbin(ip2long(real_ip())));
foreach(explode('|',$iptables) as $iprows){
    if($remoteiplong==$iprows)exit('欢迎使用！');
    $ipbanrange=explode('~',$iprows);
    if($remoteiplong>=$ipbanrange[0] && $remoteiplong<=$ipbanrange[1])
        exit('欢迎使用！');
}
//HEADER 特征屏蔽
if(preg_match("/manager/", strtolower($_SERVER['HTTP_USER_AGENT'])) || preg_match("/QZONEJSSDK/", $_SERVER['HTTP_USER_AGENT']) || strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla')===false && strpos($_SERVER['HTTP_USER_AGENT'], 'ozilla')!==false || preg_match("/Windows NT 6.1/", $_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_ACCEPT']=='*/*' || preg_match("/Windows NT 5.1/", $_SERVER['HTTP_USER_AGENT']) && $_SERVER['HTTP_ACCEPT']=='*/*' || preg_match("/vnd.wap.wml/", $_SERVER['HTTP_ACCEPT']) && preg_match("/Windows NT 5.1/", $_SERVER['HTTP_USER_AGENT']) || isset($_SERVER['HTTP_REFERER']) && strpos($_SERVER['HTTP_REFERER'], 'urls.tr.com')!==false || isset($_COOKIE['ASPSESSIONIDQASBQDRC']) || empty($_SERVER['HTTP_USER_AGENT']) || preg_match("/Alibaba.Security.Heimdall/", $_SERVER['HTTP_USER_AGENT'])) {
    exit('欢迎使用！');
}
if(strpos($_SERVER['HTTP_USER_AGENT'], 'iPhone OS 9_3_4')!==false && $_SERVER['HTTP_ACCEPT']=='*/*' || strpos($_SERVER['HTTP_USER_AGENT'], 'iPhone OS 8_4')!==false && $_SERVER['HTTP_ACCEPT']=='*/*' || strpos($_SERVER['HTTP_USER_AGENT'], 'Android 6.0.1')!==false && strpos($_SERVER['HTTP_USER_AGENT'], 'MQQBrowser/6.8')!==false && $_SERVER['HTTP_ACCEPT']=='*/*' || strpos($_SERVER['HTTP_ACCEPT_LANGUAGE'], 'en')!==false && strpos($_SERVER['HTTP_ACCEPT_LANGUAGE'], 'zh')===false || strpos($_SERVER['HTTP_USER_AGENT'], 'iPhone')!==false && strpos($_SERVER['HTTP_USER_AGENT'], 'en-')!==false && strpos($_SERVER['HTTP_USER_AGENT'], 'zh')===false) {
    exit('您当前浏览器不支持或操作系统语言设置非中文，无法访问本站！');
}
}
?>

一、代码内需要修改 / 注意的地方
1、必须留意的图片外链（重点！）

<img src="https://external-30160.picsz.qpic.cn/9b9cbd00219647d885d3876dc50095da" alt="引导页" />

这是腾讯图床外部图片链接，风险：图片随时失效、被屏蔽
✅建议操作：
把引导图下载下来，上传至你自己服务器 / 图床，替换成自己图片直链。

2、功能开关

$conf['qqjump']=1;

1 = 开启微信 / QQ 内置浏览器引导页
0 = 关闭引导跳转功能
3、函数依赖（极易报错）
代码调用 real_ip() 获取真实访客 IP
如果你的网站程序没有自带 real_ip () 函数，直接访问网站会 500 报错！
把下方函数粘贴到这段防红代码最顶部：

function real_ip(){
    $ip = $_SERVER['REMOTE_ADDR'];
    if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
        foreach ($matches[0] AS $xip) {
            if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
                $ip = $xip;
                break;
            }
        }
    } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#', $_SERVER['HTTP_CF_CONNECTING_IP'])) {
        $ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
    }
    return $ip;
}