Php judges ip blacklist program code instances

This article mainly introduces php code examples for judging ip blacklist programs. For more information, see

This article mainly introduces php code examples for judging ip blacklist programs. For more information, see

And supports Class c ip addresses, for example:

Ip.txt
192.168
211.67.188
211.67.191.25
The Code is as follows:

The Code is as follows:

/*
* IP address blacklist and whitelist
* The ip address of the visitor address is in ip.txt and supports Class c ip addresses.
* 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 ();
}
}

?>

You can use the code above to cheat you. The code below will be upgraded.

The Code is as follows:

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 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;
// Obtain the user ip Address
$ Ip = $ this-> get_client_ip ();
$ Ip = trim ($ Ip );
// Remove the IP segments in the blacklist
If ($ iptable ){
Foreach ($ iptable as $ value ){
If (preg_match ("{$ value}", $ Ip )){
$ IsJoined = false;
Break;
}
}
}
// Perform the following operations 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 clip:

The Code is as follows:

$ OBlock_ip = new block_ip ();
$ OBlock_ip-> checkIP ();