//根据第几周获取当周的开始日期与最后日期
//$year 年 $week一年中的第几周
private function getWeek($year,$week){
$firstdayofyear=mktime(0,0,0,1,1,$year);
$firstweekday=date('N',$firstdayofyear);
$firstweenum=date('W',$firstdayofyear);
if($firstweenum==1){
$day=(1-($firstweekday-1))+7*($weeknum-1);
$startdate=date('Y-m-d',mktime(0,0,0,1,$day,$year));
$enddate=date('Y-m-d',mktime(0,0,0,1,$day+6,$year));
}else{
$day=(9-$firstweekday)+7*($weeknum-1);
$startdate=date('Y-m-d',mktime(0,0,0,1,$day,$year));
$enddate=date('Y-m-d',mktime(0,0,0,1,$day+6,$year));
}
return array($startdate,$enddate);
}
