<?php

/**

 * 获取客户端IP

 * @param  integer $type 返回类型 0:string,1:long

 * @return string|long

 */

function getClientIp($type = 0) {

    $ip = NULL;

    if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {

        $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);

        $pos = array_search('unknown',$arr);

        if(false !== $pos) unset($arr[$pos]);

        $ip  = trim($arr[0]);

    }elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {

        $ip = $_SERVER['HTTP_CLIENT_IP'];

    }elseif (isset($_SERVER['REMOTE_ADDR'])) {

        $ip = $_SERVER['REMOTE_ADDR'];

    }

    $long = sprintf("%u", ip2long($ip));

    $ip   = $long ? array($ip, $long) : array('0.0.0.0', 0);

    return $ip[$type];

}

/**

 * 获取IP信息

 * @param  string|long $ip  IP地址

 * @return array

 */

function getIpInfo($ip)

{

    if (is_long($ip)) {

        $ip = long2ip($ip);

    }

    $api = 'http://ip.taobao.com/service/getIpInfo.php';

    $ret = file_get_contents($api . '?ip=' . $ip);

    $ret = json_decode($ret, true);

    if ($ret['code'] == 0) {

        return $ret['data'];

    }

    return array();

}