train::query PHP Method

    public static function query($query_date, $from_station, $to_station)
    {
        $url = 'https://kyfw.12306.cn/otn/lcxxcx/query?';
        $param = array('purpose_codes' => 'ADULT', 'queryDate' => $query_date, 'from_station' => $from_station, 'to_station' => $to_station);
        $url .= http_build_query($param);
        do {
            $restul = Helper_Http::get($url);
            $rt = json_decode($restul, true);
            if (isset($rt['status']) && $rt['status']) {
                self::do_query($rt['data']['datas']);
            } else {
                if (isset($rt['messages'])) {
                    var_dump($rt['messages']);
                } else {
                    var_dump($restul);
                }
            }
        } while (true);
    }