Get date range for week or month

DateUtils.php

<?php
/**
 * Created by PhpStorm.
 * User: david.foliti
 * Date: 01/02/18
 * Time: 11:46
 */

namespace CalendarDipBundle\Utils;

class DateUtils
{
    private $dateRange;

    /**
     * Get array Date range for a $week and $year
     *
     * @param null $week
     * @param null $year
     * @return array
     */
    public function getWeekRange($week = null, $year = null)
    {
        if ($week === null) {
            $today = new \DateTime(date('Y-m-d'));
            $week = $today->format('w');
        }

        if ($year === null) {
            $year = date('Y');
        }

        for ($i = 1; $i < 8; $i++) {
            $date = new \DateTime();
            $this->dateRange[] = $date->setISODate($year, $week, $i)->setTime(9, 0, 0);
        }

        return $this->dateRange;
    }

    /**
     * Get array Date range for a $month and $year
     *
     * @param null $month
     * @param null $year
     * @return array
     */
    public function getMonthRange($month = null, $year = null)
    {
        if ($month === null) {
            $month = date('m');
        }

        if ($year === null) {
            $year = date('Y');
        }

        $dayCount = cal_days_in_month(CAL_GREGORIAN, $month, $year);

        for ($i = 1; $i <= $dayCount; $i++) {
            $day = $year . '-' . $month . '-' . $i;
            $date = new \DateTime($day);
            $this->dateRange[] = $date->setTime(9, 0, 0);
        }

        return $this->dateRange;
    }
}