PHP IP and IP segment access restriction code_PHP tutorial-PHP Tutorial-php.cn

PHP IP and IP segment access restriction code_PHP tutorial

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Release： 2016-07-21 15:48:46

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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); 
} 
} 
?>