laravel de calender

.php

function calendar()
{
    $cal = [];
    foreach (range(0, 6) as $add) {
        $m = Carbon::parse(date('Y-m-01'))->addMonth($add);
        $ym = $m->format('Y年m月');
        foreach (range(0, $m->format('t')-1) as $addd) {
            $date = $m->copy()->addDay($addd);
            $w = $date->format('w');
            $W = $date->format('W');
            if ($w == 0) {
                $W++;
            }
            $cal[$ym][$W][$w] = [$date->format('Y-n-d'), $date->format('j')];
        }

    }
    return $cal;
}