php 求日期是星期几

<?php
$date = new DateTime('2023-10-05');
$dayOfWeek = $date->format('N'); // 获取星期几，1 表示星期一，7 表示星期日

switch ($dayOfWeek) {
    case 1:
        echo "Monday";
        break;
    case 2:
        echo "Tuesday";
        break;
    case 3:
        echo "Wednesday";
        break;
    case 4:
        echo "Thursday";
        break;
    case 5:
        echo "Friday";
        break;
    case 6:
        echo "Saturday";
        break;
    case 7:
        echo "Sunday";
        break;
}
?>

$date = new DateTime('2023-10-05', new DateTimeZone('Asia/Shanghai'));

$date = new DateTime('2023-10-05', new DateTimeZone('Asia/Shanghai'));
$date->setTimezone(new DateTimeZone('America/New_York'));
echo $date->format('Y-m-d H:i:s');

$date = new DateTime('2023-10-05');
$weekdays = ['日', '一', '二', '三', '四', '五', '六'];
$dayOfWeek = $weekdays[$date->format('w')];

echo "今天是星期" . $dayOfWeek;