PHP获取指定日期所在月的开始日期与结束日期

如下：

  getMonthRange( ,  =  = (  (  = ( 'Y-m-1 00:00:00',   = ( 't',  = ( 'Y-m-' .  . ' 23:59:59',  ?>

代码：

 getWeekRange(==(=('%u',['sdate']=('Y-m-d 00:00:00',-(-1)*86400['edate']=('Y-m-d 23:59:59',+(7-)*86400 .jbxue.
 getMonthRange(==(=('t',['sdate']=('Y-m-1 00:00:00',['edate']=('Y-m-'..' 23:59:59', 
 getFilter(=( 1:
['sdate']=('Y-m-d 00:00:00',('-1 day'['edate']=('Y-m-d 23:59:59',('-1 day' 2:
=getWeekRange(('Y-m-d' 3:
=('Y-m-d',('-1 week'=getWeekRange( 4: 
=('Y-m-d',('-2 week'=getWeekRange( 5: 
=getMonthRange(('Y-m-d' 6:
=('Y-m-d',('-1 month'=getMonthRange( ?>