PHP学习：PHP获取指定时间段之间的 年,月,天,时,分,秒

PHP编程
Class Utils {
     /**
  * format MySQL DateTime (YYYY-MM-DD hh:mm:ss) 把mysql中查找出来的数据格式转换成时间秒数
  * @param string $datetime
  */
 public function fmDatetime($datetime) {
   $year = substr($datetime,0,4);
   $month = substr($datetime,5,2);
   $day = substr($datetime,8,2);
   $hour = substr($datetime,11,2);
   $min = substr($datetime,14,2);
   $sec = substr($datetime,17,2);
   return mktime($hour,$min,$sec,$month,$day,0+$year);
 }
 /**
  * 
  * 根据俩个时间获取俩个时间的 包含的 年,月数,天数,小时,分钟,秒
  * @param String $start
  * @param String $end
  * @return ArrayObject 
  */
  private function diffDateTime($DateStart,$DateEnd){
  $rs = array();
  
  $sYear = substr($DateStart,0,4);
  $eYear = substr($DateEnd,0,4);
  
  $sMonth = substr($DateStart,5,2);
  $eMonth = substr($DateEnd,5,2);
  
  $sDay = substr($DateStart,8,2);
  $eDay = substr($DateEnd,8,2);
  
  $startTime = $this->fmDatetime($DateStart);
  $endTime = $this->fmDatetime($DateEnd);
  $dis = $endTime-$startTime;//得到俩个时间的秒数
  $d = ceil($dis/(24*60*60));//得到天数
  $rs['day'] = $d;//天数
  $rs['hour'] = ceil($dis/(60*60));//小时
  $rs['minute'] = ceil($dis/60);//分钟
  $rs['second'] = $dis;//秒数
  $rs['week'] = ceil($d/7);//周
  
  $tem = ($eYear-$sYear)*12;//月份
  $tem1 = $eYear-$sYear;//年
  if($eMonth-$sMonth<0){//月份相减为负
   $tem +=($eMonth-$sMonth);
  }else if($eMonth==$sMonth){//月份相同
   if($eDay-$sDay>=0){
    $tem ++;
    $tem1++;
   }
  }else if($eMonth-$sMonth>0){//月份相减正负
   $tem1++;
   if($eDay-$sDay>=0){//且日期相减为正数
    $tem +=($eMonth-$sMonth)+1;
   }else{
    $tem +=($eMonth-$sMonth);
   }
  }
  $rs['month'] = $tem;
  $rs['year'] = $tem1;
  
  return $rs;
 }
}