PHP 获取当前时间前52周 12个月 4个季度

private function getWeeks($now,$weeks=52){
    $weeksList = [];
    for($i=1;$i<=$weeks;$i++){
        $week = (int)date("w",$now);  //当时是周几
        $number = $week == 0 ? 7 : $week; //如遇周末,将0换成7
        $diffDay = $number - 1; //求到周一差几天
        $endDiffDay = 7 - $number; //到周末还有几天
        $startDate = date("Y-m-d",$now - ($diffDay * 86400));
        $endDate = date("Y-m-d",$now + ($endDiffDay * 86400));
        $weeksList[$i] = [$startDate,$endDate];
        $now = strtotime($startDate)-1;
    }
    return $weeksList;
}

周：

private function getQuarter($y,$m,$month31,$quarterTimes=4){
    $quarterList = [];
    $year = $y;
    for($i=1;$i<=$quarterTimes;$i++){
        # 每个季度月份
        $quarter = [
            ['01','02','03'],
            ['04','05','06'],
            ['07','08','09'],
            [10,11,12]
        ];
        foreach ($quarter as $v){
            if(in_array($m,$v)){
                $startDate = date($y.'-'.$v[0].'-01');
                if(in_array((int)$v[2],$month31)){
                    $endDate = date($y.'-'.$v[2].'-31');
                } else{
                    $endDate = date($y.'-'.$v[2].'-30');
                }
                # 不存在 2月份结束的 季度
            }
        }
        $quarterList[$i] = [$startDate,$endDate];
        if($m==1 && $y != $year){
            $m=12;
            $y = $year;
        } else {
            $m = date('m',strtotime($startDate)) - 3;
        }
        if($m == 1){
            $year-=1;
            continue;
        }
    }
    return $quarterList;
}

季度：

private function getMonths($y,$m,$month31,$month=12){
    $monthList = [];
    $year = $y;
    for($i=1;$i<=$month;$i++){
        if($m<10){
            $m = '0'.$m;
        }
        $startDate = date($y.'-'.$m.'-01',time());
        if(in_array($m,$month31)){
            $endDate = date($y.'-'.$m.'-31',time());
        } elseif($m != 2){
            $endDate = date($y.'-'.$m.'-30',time());
        } else {
            if ($y%4==0 && ($y%100!=0 || $y%400==0) && $m == 2){
                $endDate = date($y.'-'.$m.'-29',time());
            }else{
                $endDate = date($y.'-'.$m.'-28',time());
            }
        }
        $monthList[$i] = [$startDate,$endDate];
        if($m==1 && $y != $year){
            $m=12;
            $y = $year;
        } else {
            $m = date('m',strtotime($startDate)) - 1;
        }
        if($m == 1){
            $year-=1;
            continue;
        }
    }
    return $monthList;
}

月: