PHP 制作日历

<style>
    .mm,.tt,.dd{
        width: 350px;
    }

    .dd{
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-start;
    }
    .dd li{
        list-style-type: none;
        height: 48px;
        width: 48px;
        line-height: 48px;
        text-align: center;
    }
</style>
<?php
$aa = getRili('2022-1-1','2022-12-31');

foreach ($aa as $week){
    echo "<div class='mm'>";
    echo "<div class='tt'>".$week['tit']."</div>";
    echo "<div class='dd'>";
    foreach ($week['days'] as $key =>$day){
        echo "<li>".$day['text']."</li>";
    }
    echo "</div></div>";
}



function getRili($start='',$end=''){
    $start = !empty($start)? $start:date('Y-01-01');
    $end = !empty($end)? $end:date('Y-12-31');

    $list = [];
    while(strtotime($start)<=strtotime($end)){

        $m = date('m',strtotime($start));
        $d = date('d',strtotime($start));
        $t = date('t',strtotime($start));
        $weekDay = date('w',strtotime($start));  //每周的第几天
        $week = get_week(strtotime($start));


        for ($w=0;$w<=6;$w++){
            if(($w==0 && $d=='01')){
                $list[$m]['tit'] = date('n月',strtotime($start));
            }

            if($w==$weekDay){
                $list[$m]['days'][] = [
                    'text' => $d,
                    'day' => $start,
                    'w' => $week
                ];
            }

            if($w<$weekDay && $d=='01'){
                $list[$m]['days'][] = [
                    'text' => '--',
                    'day' => $start,
                    'w' => $week
                ];
            }

            if($d==$t && $weekDay<$w){
                $list[$m]['days'][] = [
                    'text' => '--',
                    'day' => $start,
                    'w' => $week
                ];
            }
        }

        $start = date('Y-m-d',strtotime("$start +1 Day"));

    }

    return $list;

}


function get_week($date){
    $w = date('W',$date);
    $m = date('n',$date);
    return $w==1?($m==12?53:1):($w>=51?($m==1?1:$w):$w);
}