PHP 上禮拜時間

        //上月一號
        $startDate = date("Y-m-01", strtotime("-1 month"));

        //上月最後一天
        $endDate = date("Y-m-t", strtotime("-1 month"));

        //上個禮拜一
        $startDate = date("Y-m-d", strtotime("-2 week Monday"));

        //上個禮拜天
        $endDate = date("Y-m-d", strtotime("-1 week Sunday"));