ignitae Academy

PHP Design Patterns

Strategy, Pipeline, Specification and Builder, the way PHP 8 interfaces, enums, closures and readonly classes make them.

Syllabus

Strategy

Strategy: an interface, several implementations, and an enum to pick one
Strategy: shipping quotes behind an enum (exercise)

Pipeline

Pipeline: middleware is just closures calling the next closure
Pipeline: middleware from closures (exercise)

Specification

Specification: business rules you can and, or and not together
Specification: composable eligibility rules (exercise)

Builder

Builder: immutable with*() steps and a build() that validates
RequestBuilder: immutable steps, validating build() (exercise)