计算两个时间戳之间相差的日时分秒

/**
     * ---------------------------------------------------------------------
     * 计算两个时间戳之间相差的日时分秒
     * @param $begin_time 开始时间戳
     * @param $end_time 结束时间戳
     * @author liqiuyue
     * ---------------------------------------------------------------------
     */
    function timediff($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;
    }