- * @param array $date ('Y', 'M', 'd')
- * @param string $separator the seperator to use when formatting the date
- * @param string $invalidDate what to return if the date is invalid
+ * @param array $date ('Y', 'M', 'd')
+ * @param string $separator the seperator to use when formatting the date
+ * @param int|string $invalidDate what to return if the date is invalid