tp5 通过IP获取对应ip的城市

 public function test()
    {
        $request = Request::instance();
        $ip = $request->ip();
        $url='http://ip.taobao.com/service/getIpInfo.php?ip='.$ip;
        $result = file_get_contents($url);
        $result = json_decode($result,true);
        dump($result);
    }