PHP IP and IP segment access restriction code_PHP tutorial

192.168.1.1 A single IP
192.168.1.* Agent 192.168.1.1-192.168.1-255
192.158.1.2-20 This is a representative 192.158.1.2-192.158.1.20
.1.[1|2|3]
Hey~ I don’t know if the idea is comprehensive or not, let’s bring it up for discussion
Use
The following is a quote:
$oBlock_ip = new block_ip();
$oBlock_ip->checkIP();
The following is a reference fragment:

Copy code 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) {
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( $Ip);
//Remove IP segments from the blacklist
if ($iptable) {
foreach($iptable as $value) {
if (preg_match("{$value} ",$Ip)) {
$IsJoined = false;
break;
}
}
}
//If it is in the ip blacklist, perform the following operations
if( !$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);
}
}
?>

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