« DateTimeImmutable::modify DateTimeImmutable::setDate » PHP Manual DateTimeImmutable The __set_state handler DateTimeImmutable::__set_state (PHP 5 >= 5.5.0, PHP 7) DateTimeImmutable::__set_state — The __set_state handler 说明 public static DateTimeImmutable::__set_state ( array $array ) : DateTimeImmutable Like DateTime::__set_state() but works with DateTimeImmutable.