php网站防止刷流量攻击方法_PHP教程

流量攻击是一种比较初级的网站攻击方法，就是不停的去刷样网站，导致服务器处理不过来或数据库负载不了，导致网站无法正常方法的一种攻击手段了，下面我来介绍一个利用php防网站刷流量攻击方法。

代码如下

复制代码

//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($ip."rn",$filehtarr))die("Warning:"." "."Your IP address are forbided by some reason, IF you have any question Pls emill to [e-mail]!"); //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."rn",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 if($iptem!=$checkip)$str.=$v; else{ $yesno=false; if($uritem!=$checkuri)$str.=$iptem.$checkuri.$time."1rn"; elseif($numtem else { if(!file_exists($fileforbid)){$addforbidarr=array($ip."rn",time()."rn",1);file_put_contents($fileforbid,$addforbidarr);} file_put_contents("log/forbided_ip.log",$ip."--".date("Y-m-d H:i:s",time())."--".$uri."rn",FILE_APPEND); $timepass=$timetem+$allowTime-$time; die("Warning:"." "."Sorry,you are forbided by refreshing frequently too much, Pls wait for ".$timepass." seconds to continue!"); } } } } if($yesno) $str.=$checkip.$checkuri.$time."1rn"; file_put_contents($file,$str); ?>

利用session 跟踪防post提交

代码如下	复制代码
session_start(); $clean = array(); $email_pattern = '/^[^@s]+@([-a-z0-9]+.)+[a-z]{2,}$/i'; if (preg_match($email_pattern, $_POST['email'])) { $clean['email'] = $_POST['email']; $user = $_SESSION['user']; $new_password = md5(uniqid(rand(), TRUE)); if ($_SESSION['verified']) { /* Update Password */ mail($clean['email'], 'Your New Password', $new_password); } } ?>

http://www.bkjia.com/PHPjc/629634.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/629634.htmlTechArticle流量攻击是一种比较初级的网站攻击方法，就是不停的去刷样网站，导致服务器处理不过来或数据库负载不了，导致网站无法正常方法的一...