`ocramius\util\Optional`

, _(*1)

This package is a PHP port of the java.util.Optional class in the OpenJDK libraries., _(*2)

Currently maintained by Niklas Schöllhorn, taken over 3rd March, 2019, _(*3)

You can find the API of java.lang.Optional in the Java 8 API docs., _(*4)

Installation

composer require ocramius/optional

Differences with the Java implementation

Because of PHP's current limitations, I had to rewrite some bits of the Java implementation as follows:, _(*5)

Optional#empty() is named Optional#newEmpty(), because empty is a reserved PHP keyword
type-safety is not ensured at any time: generics have simply been stripped from the Optional implementation. This may change in future, but I don't plan to do it right now.
Optional#toString() is named Optional#__toString() in accordance to PHP magic methods naming
Consumer, Predicate, Function and Supplier arguments are simply callable, for simplicity and flexibility.

License

Since this library is a direct port of the OpenJDK sources, I have to keep the original license in place, which is GPLv2 + ClassPath exceptions., _(*6)

27/02 2015

dev-master

9999999-dev https://github.com/Ocramius/Optional

A port of java.util.Optional to PHP

Sources Download

GPL-2.0

The Requires

php ~5.5

The Development Requires

by Marco Pivetta

optional java

library optional