计算两个时间戳间隔时间， （可以用于倒计时

  //获得参与用户剩余时间，用于倒计时显示
    public  function RemainingTime($begin_time,$end_time){
        if($begin_time < $end_time){
            $starttime = $begin_time;
            $endtime = $end_time;
        }else{
            $starttime = $end_time;
            $endtime = $begin_time;
        }

        //计算天数
        $timediff = $endtime-$starttime;
        $days = intval($timediff/86400);
        //计算小时数
        $remain = $timediff%86400;
        $hours = intval($remain/3600);

        //计算分钟数
        $remain = $remain%3600;
        $mins = intval($remain/60);
        //计算秒数
        $secs = $remain%60;
        $res = array("day" => $days,"hour" => $hours,"min" => $mins,"sec" => $secs);
        return $res;
    }
    public function test_time(){
        print_r($this->RemainingTime(1459209600,1459260000));
    }