如何通过在php中只提供年份作为输入参数来获取每周的开始日期和结束日期？

<?php
function getWeekDates($year) {
    $start_date = new DateTime();
    $start_date->setISODate($year, 1); // 设置日期为指定年份的第一周
    $start_date->modify('monday'); // 将日期调整为周一

    $end_date = clone $start_date;
    $end_date->modify('+6 days'); // 将日期调整为周日

    $week_dates = array();
    while ($start_date->format('Y') == $year) {
        $week_dates[] = array(
            'start_date' => $start_date->format('Y-m-d'),
            'end_date' => $end_date->format('Y-m-d')
        );

        $start_date->modify('+1 week');
        $end_date->modify('+1 week');
    }

    return $week_dates;
}

$year = 2022; // 输入的年份
$week_dates = getWeekDates($year);

foreach ($week_dates as $week) {
    echo "Week starting from " . $week['start_date'] . " to " . $week['end_date'] . "<br>";
}
?>