dms-api/app/functions.php

<?php
/**
 * Here is your custom functions.
 */

// 验证日期格式是否有问题
function isValidDate($date, $format = 'Y-m-d'): bool
{
    $d = DateTime::createFromFormat($format, $date);
    return $d && $d->format($format) === $date;
}