shadowsocks5/init/library/areacode.init.php

<?php
if (! defined('IS_INITPHP'))
    exit('Access Denied!');
define('__QQWRY__', INITPHP_PATH . "library/area/QQWry.dat");

/**
 * 国家地区定位
 *
 * @author Chen Deben
 * @copyright Meitu
 */
class areacodeInit
{

    private static $cache_data = array();

    public function get_area($ip)
    {
        include_once INITPHP_PATH . "/library/area/QQWry.class.php";
        $QQWry = new QQWry($ip);
        $country = $QQWry->Country . " " . $QQWry->Local;
        $country = mb_convert_encoding($country, 'UTF-8', 'GB2312');
        return $country;
    }

    /**
     * 是否属于中国
     *
     * @param string $area            
     * @return bool
     */
    public function inChina($area)
    {
        $china = array(
			'中国',
            '北京',
            '天津',
            '河北',
            '山西',
            '内蒙古',
            '辽宁',
            '吉林',
            '黑龙江',
            '上海',
            '山东',
            '安徽',
            '江苏',
            '浙江',
            '福建',
            '江西',
            '河南',
            '湖北',
            '湖南',
            '广东',
            '广西',
            '海南',
            '陕西',
            '甘肃',
            '宁夏',
            '青海',
            '新疆',
            '重庆',
            '四川',
            '贵州',
            '云南',
            '西藏',
            '台湾',
            '香港',
            '澳门',
			'大学',
			'亚太地区'
        );
        foreach ($china as $v) {
            if (strpos($area, $v) !== false) {
                return true;
            }
        }
        return false;
    }

    public function getIp()
    {
        if ($_SERVER["HTTP_CDN_SRC_IP"]) {
            $ip = $_SERVER["HTTP_CDN_SRC_IP"];
        } elseif ($_SERVER["HTTP_X_FORWARDED_FOR"]) {
            $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
        } elseif ($_SERVER["HTTP_CLIENT_IP"]) {
            $ip = $_SERVER["HTTP_CLIENT_IP"];
        } elseif ($_SERVER["REMOTE_ADDR"]) {
            $ip = $_SERVER["REMOTE_ADDR"];
        } elseif (getenv("HTTP_X_FORWARDED_FOR")) {
            $ip = getenv("HTTP_X_FORWARDED_FOR");
        } elseif (getenv("HTTP_CLIENT_IP")) {
            $ip = getenv("HTTP_CLIENT_IP");
        } elseif (getenv("REMOTE_ADDR")) {
            $ip = getenv("REMOTE_ADDR");
        } else {
            $ip = 'Unknown';
        }
        return $ip;
    }
}