PHP-Handbuch Funktionsreferenz Datums- und zeitrelevante Erweiterungen Datum/Uhrzeit DateTimeImmutable DateTimeImmutable::add DateTimeImmutable DateTimeImmutable::__construct DateTimeImmutable::add (PHP 5 >= 5.5.0)DateTimeImmutable::add — Adds an amount of days, months, years, hours, minutes and seconds Beschreibung public DateTimeImmutable DateTimeImmutable::add ( DateInterval $interval ) Like DateTime::add() but works with DateTimeImmutable.