PHP获取用户真实ip及城市地理位置

PHP获取用户真实ip及城市地理位置

自己不需ip库,免更新。采用淘宝IP库: http://ip.taobao.com

<?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; 
}
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