月球-I型，月份日历生成器----基于PHP7.3

• 生成月份周日的类

<?php
class mycalendar
{
    function __construct($year,$mon)
    {
        $this->nianyue=$year.'-'.$mon.'-'.'01';
        $this->firstday=strtotime(date($this->nianyue));
        $this->m = intval(date('m',$this->firstday));
        $this->wdaylist=array();
        $this->lday = strtotime(date($this->nianyue).'+1 month -1 day');
        //echo "时间戳:".date('Y-m-d',$this->lday)."
";
    }
    function startday()
    {
        $w = date('w',$this->firstday);
        $diffdays=0;
        if ($w!=0)
        {
            $diffdays= 7-$w;
        }
        $this->firstday = strtotime(date('Y-m-d',strtotime($this->nianyue))."+".$diffdays." day");
        //array_push($this->wdaylist,$w);
        //echo "
".date('Y-m-d',$this->firstday);
        //echo "
".$this->firstday;
        return $this->firstday;
    }
    function addwday()
    {
        $curday = $this->startday();
        while (true){
            if(intval(date('m',$curday)!=$this->m))
            {
                break;
            }
            //echo date('Y-m-d',$curday)."
";
            array_push($this->wdaylist,date('Y-m-d',$curday));
            $curday=strtotime(date('Y-m-d',$curday)."+7 day");
        }
        return $this->wdaylist;
    }
}

• 根据每个周日推算每个周的日期

<?php
require('mycal.php');
class gencal
{
    function __construct(array $wkday)
    {
        $this->time = strtotime($wkday[count($wkday)-1]);
        $this->wdaylist=$wkday;
        $this->ldday= date('m',$this->time);
        $this->ttday= date('t',$this->time);
        $this->firstday=strtotime($wkday[0]);
    }
    function diffdays()
    {
        $lastday = 0;
        if($this->ldday<$this->ttday)
        {
            $lastday = strtotime(date('Y-m-d',$this->time)."+1 day");
        }
        //echo "this day:".date('Y-m-d',$lastday);
        return $lastday;
    }
    function adddays()
    {
        //生成日期辗转相加
        $genarray = array();
        $startday = $this->diffdays();
        //echo $startday."
";
        $newday =   date('Y-m-d',strtotime(date('Y-m-d',strtotime($this->wdaylist[count($this->wdaylist)-1]))."+1 day"));
        //echo 'newday:'. $newday;
        $genarray[] = $newday;
        for ($i=1;$i<7;$i++)
        {
            $startday=strtotime(date('Y-m-d',$startday)."+1 day");
            $genarray[] = date('Y-m-d',$startday);
           /*array_push($genarray,strtotime(date('Y-m-d',$startday).'+1 day'));*/
       }
        return $genarray;
    }
    function minus($startday){
        //辗转相减法
        $thisweek=array();
        $startday =  strtotime($startday);
        $thisweek[7]=date('Y-m-d',$startday);
        //echo $startday;
        for($i=6;$i>0;$i--)
        {
           $startday=strtotime(date('Y-m-d',$startday)."-1 day");
           $thisweek[$i]=date('Y-m-d',$startday);
           //echo date('Y-m-d',$startday)."---"."
";
        }
        return $thisweek;
    }
    function gendaylist()
    {
        $finallist=array();
        for ($i=0;$i<count($this->wdaylist);$i++)
        {
            array_push($finallist,$this->minus($this->wdaylist[$i]));
        }
        array_push($finallist,$this->adddays());
        return $finallist;
    }
}

• 测试

$cal = new mycalendar(2019,9);
$wuwa= new gencal($cal->addwday());
//$wuwa->adddays();
print_r($wuwa->gendaylist());

• 输出结果

Array
(
    [0] => Array
        (
            [7] => 2019-09-01
            [6] => 2019-08-31
            [5] => 2019-08-30
            [4] => 2019-08-29
            [3] => 2019-08-28
            [2] => 2019-08-27
            [1] => 2019-08-26
        )

    [1] => Array
        (
            [7] => 2019-09-08
            [6] => 2019-09-07
            [5] => 2019-09-06
            [4] => 2019-09-05
            [3] => 2019-09-04
            [2] => 2019-09-03
            [1] => 2019-09-02
        )

    [2] => Array
        (
            [7] => 2019-09-15
            [6] => 2019-09-14
            [5] => 2019-09-13
            [4] => 2019-09-12
            [3] => 2019-09-11
            [2] => 2019-09-10
            [1] => 2019-09-09
        )

    [3] => Array
        (
            [7] => 2019-09-22
            [6] => 2019-09-21
            [5] => 2019-09-20
            [4] => 2019-09-19
            [3] => 2019-09-18
            [2] => 2019-09-17
            [1] => 2019-09-16
        )

    [4] => Array
        (
            [7] => 2019-09-29
            [6] => 2019-09-28
            [5] => 2019-09-27
            [4] => 2019-09-26
            [3] => 2019-09-25
            [2] => 2019-09-24
            [1] => 2019-09-23
        )

    [5] => Array
        (
            [0] => 2019-09-30
            [1] => 2019-10-01
            [2] => 2019-10-02
            [3] => 2019-10-03
            [4] => 2019-10-04
            [5] => 2019-10-05
            [6] => 2019-10-06
        )

)