PHP封装函数，获取周日期

//周日期private function get_week($date){ ???$date_week ?= date("W",strtotime($date)); ??//上周日期是第几周 ???$week_num = date("w",strtotime($date)); ????//上周日期是星期几 ???if($week_num == 0) $week_num = 7; ???$starttime = strtotime($date) - ($week_num-1)*24*3600; ?//哪一周开始的时间（因为开始时间直接设置为了周一） ???$endtime = strtotime($date) + (7-$week_num +1)*24*3600 -1; //哪一周结束的时间 ???return array( ???????‘starttime‘ => $starttime, ?????????????????????????//上周的星期一 ???????‘endtime‘ ??=> $endtime, ???????????????????????????//上周的星期日 ???????‘date‘ ?????=> $date, ???????‘week_num‘ ?=> $week_num, ??????????????????????????//星期几 ???????‘date_week‘ => date("o",$starttime).‘-‘.$date_week ?//上周是第几周 ???);}