<?php
/**
 * 获取用户真实 IP
 */
function getIP(){
    static $realip;
    if (isset($_SERVER)){
        if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
            $realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
        } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
            $realip = $_SERVER["HTTP_CLIENT_IP"];
        } else {
            $realip = $_SERVER["REMOTE_ADDR"];
        }
    }else {
        if (getenv("HTTP_X_FORWARDED_FOR")){
            $realip = getenv("HTTP_X_FORWARDED_FOR");
        } else if (getenv("HTTP_CLIENT_IP")) {
            $realip = getenv("HTTP_CLIENT_IP");
        } else {
            $realip = getenv("REMOTE_ADDR");
        }
    } 
    return $realip;
}

 
/**
* 获取 IP 地理位置
* 淘宝IP接口
* @Return: array
*/
function getCity($ip)
{
 $url="http://ip.taobao.com/service/getIpInfo.php?ip=".$ip;
 $ip=json_decode(file_get_contents($url));
 if((string)$ip->code=='1'){
 return false;
 }
 $data = (array)$ip->data;
 return $data;
}
print_r(getCity('123.22.34.213'));
?>

TaobaoIP result1 = TaobaoIPHelper.GetIP("8.8.8.8");
if (result1.code == 0)
{
    Console.WriteLine(string.Format("调用成功。该ip的国家为{0},省份为{1},城市为{2},运营商为{3}"
        , result1.data.country, result1.data.region, result1.data.city, result1.data.isp)
        );
}
else
{
    Console.WriteLine("失败，原因为："+result1.errorMsg);
}
TaobaoIP[] result2 = TaobaoIPHelper.GetDomain("lixin.me");
foreach (TaobaoIP item in result2)
{
    if (item.code == 0)
    {
        Console.WriteLine(string.Format("调用成功。该ip的国家为{0},省份为{1},城市为{2},运营商为{3}"
        , item.data.country, item.data.region, item.data.city, item.data.isp)
        );
    }
    else
    {
        Console.WriteLine("失败，原因为：" + item.errorMsg);
    }
}