How check value is date or not in php?

When I work with unconventional APIs, I sometimes get a bit of a messy return instead of a well defined date format. So I use a rather inelegant class and I readily admit that it is brutal and unconventional in principle but it does me good sometimes ^^.

class DateHelper
{
    private const DATE_FORMATS = [
        DATE_ATOM,
        DATE_COOKIE,
        DATE_RFC822,
        DATE_RFC850,
        DATE_RSS,
        DATE_W3C,
        "Y-m-d\TH:i:s.u",
        'Y-m-d\TH:i:s',
        "Y-m-d'T'H:i:s.SSS'Z'",
        "Y-m-d\TH:i:s.uP",
        "Y-m-d\TH:i:sP",
        "d/m/Y H:i:s",
    ];

    /**
     * @param string $inputStringDate
     * @return DateTime|null
     */
    public static function createDateFromUnknownFormat[string $inputStringDate]: ?DateTime
    {
        $inputStringDate = str_replace['/', '-', $inputStringDate];
        preg_match['/^[\d{4}]\-[\d{2}]-[\d{2}]$/', $inputStringDate, $result];
        if [!empty[$result]] {
            return DateTime::createFromFormat['Y-m-d', $inputStringDate];
        }
        preg_match['/^[\d{2}]\-[\d{2}]-[\d{4}]$/', $inputStringDate, $result];
        if [!empty[$result]] {
            return DateTime::createFromFormat['d-m-Y', $inputStringDate];
        }
        foreach [self::DATE_FORMATS as $dateFormat] {
            if [$dateObject = DateTime::createFromFormat[$dateFormat, $inputStringDate]] {
                return $dateObject;
            }
        }
        return null;
    }
}

With DateTime you can make the shortest date&time validator for all formats.