PHP Specification

Introduction

This is a simple and agnostic specification pattern implementation.

Installation

composer require davfer/php-specification

Usage

As a starting point, you can use the AttrSpecification class to create a specification based on an object attribute.

Then you can combine specifications using AndSpecification, OrSpecification and NotSpecification classes.

$spec = new AndSpecification(
    new OrSpecification(
        new AttrSpecification('name', 'john'),
        new AttrSpecification('name', 'jane'),
    ),
    new NotSpecification(
        new AttrSpecification('id', 1)
    )
);

$spec->isSatisfiedBy(new User(1, 'john')); // false
$spec->isSatisfiedBy(new User(2, 'jane')); // true
$spec->isSatisfiedBy(new User(3, 'mike')); // false

Always encapsulate the logic in a self explanatory class, like in the example above could be: JohnOrJaneButNotFirstUserSpecification.php.

Plugins

• php-specification-doctrine: Doctrine ORM Specification implementation.