php限制IP和IP段的代码(白名单)

$allow_ip = array("192.168.1.1","210.10.2.1-20","222.34.4.*","127.0.0.1");

$oBlock_ip = new allowIp($allow_ip);
if( !$oBlock_ip->checkIP() ){
echo '您的IP为:';
echo $oBlock_ip->ip;
exit('禁止访问');
}

class allowIp {

function __construct($allow_ip){
if (empty($allow_ip)) {
return false;
}
$this->allow_ip = $allow_ip;
$this->ip = '';

}

private function makePregIP($str)
{
if (strstr($str,"-")) {

$aIP = explode(".",$str);

foreach ($aIP as $k=>$v) {
if (!strstr($v,"-")) {
$preg_limit .= $this->makePregIP($v);
$preg_limit .= ".";
} else{
$aipNum = explode("-",$v);
for($i=$aipNum[0];$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->allow_ip) {
$i = 1;
foreach ($this->allow_ip as $k=>$v) {
$ipaddres = $this->makePregIP($v);

$ip = str_ireplace(".",".",$ipaddres);
$ip = str_replace("*","[0-9]{1,3}",$ip);
$ipaddres = "//m.sbmmt.com/m/".$ip."//m.sbmmt.com/m/";
$ip_list[] = $ipaddres;
$i++;
}
}
return $ip_list;
}

public function checkIP() {
$iptable = $this->getAllBlockIP();
$IsJoined = false;
//取得用户ip
$Ip = $this->get_client_ip();
$Ip = trim($Ip);
//在白名单中
if ($iptable) {
foreach($iptable as $value) {
if (preg_match("{$value}",$Ip)) {
$IsJoined = true;
break;
}
}
}
//不在白名单中
if( !$IsJoined ){
return false;
}
return true;
}

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";
$this->ip = $ip;
return($ip);
}
}