IP blacklist implementation method is to put the IP to be filtered in a TXT file or database, and then when we access to obtain our IP address and then to traverse the comparison can be achieved.
The school's news system requires some news to only open the campus IP browsing, and then rewrite a code to implement this function, the result is that, as long as the allowed IP access to ip.txt This file can be included, while supporting Class C IP, for example:
Ip.txt
192.168
211.67.188
211.67.191.25
The code is as follows:
| The code is as follows |
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/*
* IP address blacklist, whitelist
* Determine if the IP of the guest address is in Ip.txt, support Class C IP
* by Xhat
*/ $ip = $_server[' remote_addr ');
$ipArray = Preg_replace ("#rn? | n# "," ", File (' Ip.txt '));
foreach ($ipArray as $ipTest) {
if (Substr_count ($IP, $ipTest)! = "0") {
echo "OK"; Execute related commands
Die ();
}
} ?> |
Above you can use code to cheat, the following code to upgrade
| The code is as follows |
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Class Block_ip {
var $Block _ip = Array ("192.168.1.1", "210.10.2.1-20", "222.34.4.*");
function __construct () {
}
function __destruct () {
}
Private Function Makepregip ($STR) {
if (Strstr ($str, "-")) {
$aIP = Explode (".", $str);
foreach ($aIP as $k = = $v) {
if (!strstr ($v, "-")) {
$preg _limit. = Makepregip ($v);
} else{
$aipNum = Explode ("-", $v);
for ($i = $aipNum [0]; $i <= $aipNum [1]; $i + +) {
$preg. = $preg? "|". $i: "[". $i;
}
$preg _limit =strrpos ($preg _limit, ".", 1) = = (strlen ($preg _limit)-1)? $preg. "]": ".". $preg. "]";
}
}
}else{
$preg _limit. = $str. ".";
}
return $preg _limit;
}
Private Function Getallblockip () {
if ($this->block_ip) {
foreach ($this->block_ip as $k = + $v) {
$ipaddres = $this->makepregip ($v->start_ip);
$ip = Str_ireplace (".", ".", $ipaddres);
$ip = Str_replace ("*", "[0-9]{1,3}", $ip);
$ipaddres = "/". $ip. " /";
$ip _list[] = $ipaddres;
}
}
return $IP _list;
}
Public Function Checkip () {
$iptable = $this->getallblockip ();
$IsJoined = true;
Get User IP
$Ip = $this->get_client_ip ();
$Ip = Trim ($Ip);
Rejecting IP segments in the blacklist
if ($iptable) {
foreach ($iptable as $value) {
if (Preg_match ("{$value}", $Ip)) {
$IsJoined = false;
Break
}
}
}
www.bKjia.c0m If you do the following in the IP blacklist:
if (! $IsJoined) {
echo "IP Error";
Exit
}
}
Private Function Get_client_ip () {
if (getenv ("Http_client_ip") && strcasecmp (getenv ("Http_client_ip"), "Unknown")
$ip = getenv ("Http_client_ip");
else if (getenv ("Http_x_forwarded_for") && strcasecmp (getenv ("Http_x_forwarded_for"), "Unknown")
$ip = getenv ("Http_x_forwarded_for");
else if (getenv ("REMOTE_ADDR") && strcasecmp (getenv ("REMOTE_ADDR"), "Unknown")
$ip = getenv ("REMOTE_ADDR");
else if (isset ($_server[' remote_addr ')) && $_server[' remote_addr '] && strcasecmp ($_server[' Remote_ ADDR '], "unknown"))
$ip = $_server[' remote_addr ');
Else
$ip = "Unknown";
return ($IP);
}
}
?> |
Reference fragment:
| The code is as follows |
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$oBlock _ip = new Block_ip ();
$oBlock _ip->checkip (); |
http://www.bkjia.com/PHPjc/632711.html www.bkjia.com true http://www.bkjia.com/PHPjc/632711.html techarticle IP Blacklist Implementation method is to put the IP to be filtered in a TXT file or database, and then when we access to obtain our IP address and then to traverse the comparison can be achieved. The School of ...
