/*
     * 計算時間差/兩個時間日期相隔的天數,時,分,秒
     * */
    public function diff($begin_time, $end_time )
    {
        if ($begin_time < $end_time ) {
            $starttime = $begin_time;
            $endtime = $end_time;
        } else {
            $starttime = $end_time;
            $endtime = $begin_time
 
;
        }
        $timediff = $endtime - $starttime;
        $days = intval( $timediff / 86400 );
        $remain = $timediff % 86400;
        $hours = intval( $remain / 3600 );
        $remain = $remain % 3600;
        $mins = intval( $remain / 60 );
        $secs = $remain % 60;
        $res = array( "day" => $days
 
, "hour" => $hours, "min" => $mins, "sec" => $secs );
        return $res;
    }


//======== 例項使用 ========
$diff = $this->diff(time(), $data['strart_time']);
print_r($diff )