PHP에서 IP 화이트리스트에 대한 액세스를 제한하는 방법에 대한 자세한 설명

    //ip白名单配置
        'ipWlist'=>[
            'ifFilter'=>true,   //是否开启白名单功能
            'wlist'=>[
                '10.0.0.19',
            ],
            'warea1'=>'10.8.0.0/16',     //白名单网段1
            'warea2'=>'10.12.0.0/16',     //白名单网段1
        ],

private function checkIp(){
        $user_IP = ($_SERVER["HTTP_VIA"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];
        $user_IP = ($user_IP) ? $user_IP : $_SERVER["REMOTE_ADDR"];
        $ipC=config('appconf.ipWlist');
        if(!$ipC['ifFilter']){
            return true;
        }
        if(in_array($user_IP, $ipC['wlist'])){
            return true;
        }
        if( ! $this->ip_in_network($user_IP, $ipC['warea1'])){
            if( ! $this->ip_in_network($user_IP, $ipC['warea2'])){
                return false;
            }
        }
        return true;
    }
    private function  ip_in_network($ip, $network)
    {
        $ip = (double) (sprintf("%u", ip2long($ip)));
        $s = explode('/', $network);
        $network_start = (double) (sprintf("%u", ip2long($s[0])));
        $network_len = pow(2, 32 - $s[1]);
        $network_end = $network_start + $network_len - 1;
        if ($ip >= $network_start && $ip <= $network_end)
        {
            return true;
        }
        return false;
    }

define("IPFILTER",1);  
define('IPWLISTJSON',json_encode(['127.0.0.1',]));
// 业务中
$wlist = json_decode(IPWLISTJSON,1);
define('IPWLIST',"return ['127.0.0.1',];");
// 业务中
$wlist=eval(IPWLIST)
define('IPWLIST',serialize(['127.0.0.1',]));
// 业务中
$wlist=unserialize(IPWLIST);