PHP Manual Function Reference Date and Time Related Extensions Date/Time DateTimeImmutable DateTimeImmutable::__set_state DateTimeImmutable::modify DateTimeImmutable::setDate DateTimeImmutable::__set_state (PHP 5 >= 5.5.0)DateTimeImmutable::__set_state — The __set_state handler Description public static DateTimeImmutable DateTimeImmutable::__set_state ( array $array ) Like DateTime::__set_state() but works with DateTimeImmutable.