根据ip地址获取地址信息

function getAddressFromIp($ip)
{
    $urlTaobao  = 'http://ip.taobao.com/service/getIpInfo.php?ip=' . $ip;
    $urlSina    = 'http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=' . $ip;
    $json       = file_get_contents($urlTaobao);
    $jsonDecode = json_decode($json);
    //如果取不到就去取新浪的
    if($jsonDecode->code == 0)
    {
        $data['country']  = $jsonDecode->data->country;
        $data['province'] = $jsonDecode->data->region;
        $data['city']     = $jsonDecode->data->city;
        $data['isp']      = $jsonDecode->data->isp;
        return $data;
    }else
    {
        $json             = file_get_contents($urlSina);
        $jsonDecode       = json_decode($json);
        $data['country']  = $jsonDecode->country;
        $data['province'] = $jsonDecode->province;
        $data['city']     = $jsonDecode->city;
        $data['isp']      = $jsonDecode->isp;
        $data['district'] = $jsonDecode->district;
        return $data;
    }
}

// 根据ip地质获取城市名
function getCityFromIp($ip)
{
    $data = getAddressFromIp($ip);
    return $data['city'];
}