代碼如下:

//mktime = mktime($hours,minute,seconds,month,day,years) 
$start_time = mktime(0,0,0,01,09,2010); //開始時間 
$end_time = mktime(0,0,0,02,09,2010); //結束時間 
$times = $end_time-$start_time; //開始與結束之間相差多少秒 
$now_time = $times/(24*3600); //得出一共有多少

mktime得到的是秒為單位哦