//功能：计算两个时间戳之间相差的日时分秒//$begin_time  开始时间戳//$end_time 结束时间戳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;}

print_r(timediff(strtotime(2016-09-12 12:00:00‘),strtotime(‘2016-09-15 21:50:21‘)));