elazar / bag

Immutable Value Objects for PHP

Bag

Immutable Value Objects for PHP 8.3+ inspired by spatie/laravel-data, created by Davey Shafik.

Introduction

Bag helps you create immutable value objects. It's a great way to encapsulate data within your application.

Bag prioritizes immutability and type safety with built-in validation and data casting.

When to use Value Objects

Value objects should be used in place of regular arrays, allowing you enforce type safety and immutability.

Features

• Immutable & Strongly typed
• Value casting — both input and output
• Collection support
• Composable — nest Bag value objects and collections
• Built-in validation

Note

Bag is framework-agnostic, but it works great with Laravel. Bag uses standard Laravel Collections and Validation. In addition, it will automatically inject Bag\Bag value objects into your controllers with validation.

Requirements

Bag requires PHP 8.3+, and supports Laravel 11.x.

Installation

You can install the package via composer:

composer require dshafik/bag

Usage

Creating a Value Object

To create a basic Value Object, extend the Bag\Bag class and define your properties in the constructor:

use Bag\Bag;

readonly class MyValue extends Bag {
    public function __construct(
        public string $name,
        public int $age,
    ) {
    }
}

Instantiating a Value Object

To create a new instance of your Value Object, call the ::from() method:

$value = MyValue::from([
    'name' => 'Davey Shafik',
    'age' => 40,
]);

Documentation

Full documentation can be found here.