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Example code of dcsg/php-immutable-collections

Informations about the package php-immutable-collections

Minimalist and Typed Immutable Collections for PHP

Minimum PHP Version Latest Stable Version License Build Status StyleCI SymfonyInsight Quality Gate Status Coverage Vulnerabilities Bugs Security Rating Total Downloads

A library that provides a set of minimalist, typed and piped Immutable Collections for PHP.

Requirements

PHP > 7.2

Installation

What Problems does this solve?

The lack of Generics in PHP does not allow to have typed collections in PHP.

This Library provides two abstract Immutable Collections:

Why Typed Immutable Collections

Typed Collections

Since PHP does not have Generics like Java has, it's not possible to have native typed collections. The Collections available in this Library are the foundation for you to create your own Typed Collections, you just need to extend them.

Typed Immutable Collections for DDD (Domain Driven Design)

DDD is all about having your code speaking the business language, the called Ubiquitous Language. Without Collections in PHP this is very hard to achieve using Arrays because you cannot add behavior to them. So what usually happens you add that behavior to your entity but it shouldn't be there. Another problem is the mutability of Arrays, VOs (Value Objects) MUST be always immutable and that's impossible with Arrays and you should always guarantee that the elements of that Array are all of the same type.

Collections vs Arrays

Other PHP Collections

There are other Collections for PHP out there, naming a few we have Doctrine Collections and Illuminate Collections. Those collections they solve different problems, are tailored to their specific use case, and their APIs are extensive and more important those Collections are Mutable. These combinations make it difficult to use those Collections for more simple use cases. That's why the Collections we provide here, have a very small API and don't even expose the Iterator API. This way you have the possibility to use them and extend it's behavior tailored for your needs.

Features

Basic usage

Creating a Typed List Collection
Creating a Typed Set Collection

Examples

We provide two simple examples for better understanding. One related to invoices and another one regarding Legs of a Cargo Ship.

Change log

Please see CHANGELOG for more information on what has changed recently.

Testing

Contributing

Please see CODE OF CONDUCT for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Credits

License

The MIT License (MIT). Please see License File for more information.

All versions of php-immutable-collections with dependencies

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Requires php Version ^7.2|^7.4|^8.0|^8.1
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