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php防止网站受攻击办法

发布时间:2023-07-27 09:50:01 所属栏目:PHP教程 来源:
导读:最近网站经常被攻击,后来想到了一个利用php来防止网站受攻击的办法,下面是我的代码,代码不是最好的,根据自己的需求来做,下面来看看我的代码.

/*
*网站防ip攻击代码(anti-ip attack code website)2010-11-20,ve
最近网站经常被攻击,后来想到了一个利用php来防止网站受攻击的办法,下面是我的代码,代码不是最好的,根据自己的需求来做,下面来看看我的代码.

/*  
*网站防ip攻击代码(anti-ip attack code website)2010-11-20,ver2.0  
*mydalle.com anti-refresh mechanism  
*design by www.Cuoxin.com 
*/ 
 
//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 mydalle.com anti-refresh mechanism, if you have any question pls emill to shop@mydalle.com!
(mydalle.com anti-refresh mechanism is to enable users to have a good shipping services, but there maybe some inevitable network problems in your ip address, so that you can mail to us to solve.)"); 
 
//加入禁止ip  
$time=time();  
$fileforbid="log/forbidchk.dat";  
if(file_exists($fileforbid))  
{ if($time-filemtime($fileforbid)>30)unlink($fileforbid);  
else{  
$fileforbidarr=@file($fileforbid);  
if($ip==substr($fileforbidarr[0],0,strlen($ip)))  
{  
if($time-substr($fileforbidarr[1],0,strlen($time))>120)unlink($fileforbid);  
elseif($fileforbidarr[2]>120){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 = 60;//防刷新时间  
$allownum=5;//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.$time."1rn";  
elseif($numtem<$allownum)$str.=$iptem.$uritem.$timetem.($numtem+1)."rn";  
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:"."
"."pls don't refresh too frequently, and wait for ".$timepass." seconds to continue, if not your ip address will be forbided automatic by mydalle.com anti-refresh mechanism!
(mydalle.com anti-refresh mechanism is to enable users to have a good shipping services, but there maybe some inevitable network problems in your ip address, so that you can mail to us to solve.)");  
} //开源代码Cuoxin.com 
}  
}  
}  
if($yesno) $str.=$checkip.$checkuri.$time."1rn";  
file_put_contents($file,$str);  
?> 

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