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.
<?php /* *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.phprm.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 " . $timepass . " seconds to continue, if not your ip address will be forbided automatic by mydalle.com anti-refresh mechanism! (mydalle.com anti-refresh mechanism is to enable users to have a good shipping services, but there maybe some inevitable network problems in your ip address, so that you can mail to us to solve.)"); } } } } if ($yesno) $str.= $checkip . $checkuri . $time . "1rn"; file_put_contents($file, $str); ?>
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