Get Start Date and End Date every weeks in a month with Carbon

index.php

<?php

public function getWeeks(int $month, int $year = null): array {
    $year = is_null($year) ? Carbon::now()->year : $year;

    $date = Carbon::createFromFormat('Y-m', $year . '-' . $month)
        ->firstOfMonth();
    $oDate = $date->copy();

    $data = [];
    while($date->month == $month) {
        $start = $date->copy()->startOfWeek();
        $end = $date->copy()->endOfWeek();
        $data[$date->weekOfMonth-1]['start'] = $start->month == $month
            ? $start->format('Y-m-d')
            : $oDate->format('Y-m-d');
        $data[$date->weekOfMonth-1]['end'] = $end->month == $month
            ? $end->format('Y-m-d')
            : $oDate->endOfMonth()->format('Y-m-d');
        $date->addWeek();
    }

    return $data;
}