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.
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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