PHP to prevent Ddos,dns, cluster attack implementation code

<?PHP/*vim:set expandtab tabstop=4 shiftwidth=4:*/// +----------------------------------------------------------------------+// | PHP Version 5 |// +----------------------------------------------------------------------+// | Copyright (c) 1997-2004 the PHP Group |// +----------------------------------------------------------------------+// | This source file was subject to version 3.0 of the PHP license, |//| That's bundled with the "This" file LICENSE, and is |//| available through the world-wide-web at the following URL: |// | Http://www.php.net/license/3_0.txt.                                  |// | If you do not receive a copy of the PHP license and is unable to |//| Obtain it through the World-wide-web, please send a note to |// |               [Email protected] so we can mail you a copy immediately. |// +----------------------------------------------------------------------+// | Authors:original Author <[email protected]> |// | Your Name <[email protected]> |// +----------------------------------------------------------------------+////$Id: $/** * Protect against DDoS, DNS, cluster attacks * edit www.cxyblog.com*///Query prohibit IP$ip = $_server['REMOTE_ADDR']; $fileht=". Htaccess2";if(!file_exists ($FILEHT)) file_put_contents ($fileht,""); $filehtarr=@file ($fileht);if(In_array ($ip."", $filehtarr)) Die ("Warning:" . "<br>" . "Your IP address is forbided by some reason and IF you had any question Pls emill to [email protected]!");//Add Forbidden IP$time =Time (); $fileforbid="Log/forbidchk.dat";if(File_exists ($fileforbid)) {if($time-filemtime ($fileforbid) > -) unlink ($fileforbid); Else{$fileforbidarr=@file ($fileforbid); if($ip = = substr ($fileforbidarr [0],0, strlen ($IP))) {            if($time-substr ($fileforbidarr [1],0, strlen ($time)) > -) unlink ($fileforbid); ElseIf ($fileforbidarr [2] > -{file_put_contents ($fileht, $ip."", file_append);unlink ($fileforbid); } Else{$fileforbidarr [2]++;            File_put_contents ($fileforbid, $fileforbidarr); }        }    }}//Anti-Refresh$str =""; $file="Log/ipdate.dat";if(!file_exists ("Log") &&!is_dir ("Log")) mkdir ("Log",0777);if(!file_exists ($file)) file_put_contents ($file,""); $allowTime= -;//anti-refresh time$allowNum =Ten;//anti-refresh times$uri = $_server['Request_uri']; $checkip=MD5 ($IP); $checkuri=MD5 ($uri); $yesno=true; $ipdate=@file ($file);foreach($ipdate as$k =$v) {$iptem= substr ($v,0, +); $uritem= substr ($v, +, +); $timetem= substr ($v, -,Ten); $numtem= substr ($v, About); 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 is 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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PHP to prevent Ddos,dns, cluster attack implementation code