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  • php防止刷新(流量攻击)的一段代码

    <?php
    //查询禁止IP
    $ip =$_SERVER['REMOTE_ADDR'];
    $fileht=".htaccess2";
    if(!file_exists($fileht))file_put_contents($fileht,"");
    $filehtarr=@file($fileht);
    if(in_array($ip." ",$filehtarr))die("Warning:"."<br>"."Your IP address are forbided by some reason, IF you have any question Pls emill to shop@mydalle.com!");

    //加入禁止IP
    $time=time();
    $fileforbid="log/forbidchk.dat";
    if(file_exists($fileforbid)){
        if($time-filemtime($fileforbid)>60){
            unlink($fileforbid);
        }else{
            $fileforbidarr=@file($fileforbid);
            if($ip==substr($fileforbidarr[0],0,strlen($ip))){
                  if($time-substr($fileforbidarr[1],0,strlen($time))>600)unlink($fileforbid);
                 elseif($fileforbidarr[2]>600){

                       file_put_contents($fileht,$ip." ",FILE_APPEND);

                      unlink($fileforbid);

                 }else{

                     $fileforbidarr[2]++;

                     file_put_contents($fileforbid,$fileforbidarr);

               }
            }
        }
    }
    //防刷新
    $str="";
    $file="log/ipdate.dat";
    if(!file_exists("log")&&!is_dir("log"))mkdir("log",0777);
    if(!file_exists($file))file_put_contents($file,"");
    $allowTime = 120;//防刷新时间
    $allowNum=10;//防刷新次数
    $uri=$_SERVER['REQUEST_URI'];
    $checkip=md5($ip);
    $checkuri=md5($uri);
    $yesno=true;
    $ipdate=@file($file);
    foreach($ipdate as $k=>$v){
         $iptem=substr($v,0,32);
         $uritem=substr($v,32,32);
         $timetem=substr($v,64,10);
         $numtem=substr($v,74);
         if($time-$timetem<$allowTime){
             if($iptem!=$checkip)$str.=$v;
             else{
                $yesno=false;
                if($uritem!=$checkuri)$str.=$iptem.$checkuri.$time."1 ";
                elseif($numtem<$allowNum)$str.=$iptem.$uritem.$timetem.($numtem+1)." ";
                else{
                    if(!file_exists($fileforbid)){$addforbidarr=array($ip." ",time()." ",1);file_put_contents($fileforbid,$addforbidarr);}
                    file_put_contents("log/forbided_ip.log",$ip."--".date("Y-m-d H:i:s",time())."--".$uri." ",FILE_APPEND);
                    $timepass=$timetem+$allowTime-$time;
                    die("Warning:"."<br>"."Sorry,you are forbided by refreshing frequently too much, Pls wait for ".$timepass." seconds to continue!");
                }
            }
         }
    }
    if($yesno) $str.=$checkip.$checkuri.$time."1 ";
    file_put_contents($file,$str);

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  • 原文地址:https://www.cnblogs.com/xlz307/p/3428120.html
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