Php ip address and IP address segment access restriction code

Php ip address and IP address segment access restriction code. Read the php ip address and IP address segment access restriction code. several functions have been written, and the IP address blacklist is recorded in the library for ease of understanding, changed to a class to write the IP blacklist. 192.168.1.1 single IP192.168.1. * proxy 192.168.1.1-192.168.1-255192.158.1.

I have written several functions, and the IP blacklist is recorded in the library. for ease of understanding, I changed it to a class to write the IP blacklist.

192.168.1.1 single IP address
192.168.1. * proxy 192.168.1.1-192.168.1-255
192.158.1.2-20 represents 192.158.1.2-192.158.1.20
You can also write 192.168.1. [1 | 2 | 3]
Hey hey ~ I don't know whether the idea is comprehensive in one method. I will discuss it with you.
Use
The following is a reference clip:
$ OBlock_ip = new block_ip ();
$ OBlock_ip-> checkIP ();
The following is a reference clip:

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 );
}
}
?>