如何在PHP中验证MYSQL日期？

$date = "2022-01-01";
$dateFormat = "Y-m-d";
$dateObj = DateTime::createFromFormat($dateFormat, $date);
if ($dateObj && $dateObj->format($dateFormat) === $date) {
    // 日期有效
} else {
    // 日期无效
}

$date = "2022-01-01";
$query = "SELECT STR_TO_DATE('$date', '%Y-%m-%d') AS valid_date";
$result = mysqli_query($conn, $query);
$row = mysqli_fetch_assoc($result);
$validDate = $row['valid_date'];
if ($validDate && $validDate == $date) {
    // 日期有效
} else {
    // 日期无效
}