This article describes a TDD (Test Driven Development) approach to implement a Finite State Machine (FSM) using PHP+Laravel. However, such method is general and could be used in the programming language of your choice.

LaravelVisitor is a Visitor Design Pattern implementation for Laravel. It allows to easily execute processing of collections of arbitrary elements, without requiring to use repeated conditionals, thus improving code abstraction.

This tutorial describes a TDD approach to refactor code to Strategy pattern. Starting from working code and some test, refactoring steps are applied to obtain cleaner code

Laravel 6 introduced the LazyCollection, a different kind of collection which exploits php generators to save memory usage. While data fetching from database is natively managed by eloquent, Web API-based data fetching is not provided. This article describes how to use a paginated api endpoint to fetch data to a LazyCollection instance.