Programming Patterns

A catalog of design patterns in PHP with explanations and examples.

Creational

Object-creation patterns: how creating an object is decoupled from using it.

PHP Factory Design Pattern Creational Pattern

PHP Factory Pattern

A short screencast showing how to implement a simple Factory Method in PHP.

PHP Abstract Factory Design Pattern Creational Pattern

PHP Abstract Factory Pattern

A short screencast: the Abstract Factory pattern in PHP — products and factories built on shared interfaces.

PHP Builder Design Pattern Creational Pattern

PHP Builder Pattern

A short screencast: the Builder pattern in PHP — assembling an immutable object through a fluent method chain.

PHP Prototype Design Pattern Creational Pattern

PHP Prototype Pattern

A short screencast: the Prototype pattern in PHP — cloning an object via __clone() without re-running the constructor.

PHP Singleton Design Pattern Creational Pattern

PHP Singleton Pattern

A short screencast: the Singleton pattern in PHP — one object for the whole app with lazy initialization.

Structural

Composition patterns: how classes and objects are assembled into larger structures.

PHP Adapter Design Pattern Structural Pattern

PHP Adapter Pattern

A short screencast: the Adapter pattern in PHP — fitting an alien API into a single contract without touching legacy code.

PHP Bridge Design Pattern Structural Pattern

PHP Bridge Pattern

A short screencast: the Bridge pattern in PHP — decoupling abstraction from implementation so both vary independently.

PHP Composite Design Pattern Structural Pattern

PHP Composite Pattern

A short screencast: the Composite pattern in PHP — leaves and containers in one tree, a single render() call walks it all.

PHP Decorator Design Pattern Structural Pattern

PHP Decorator Pattern

A short screencast: the Decorator pattern in PHP — wrapping an object and adding behavior on the fly, building a chain.

PHP Facade Design Pattern Structural Pattern

PHP Facade Pattern

A short screencast: the Facade pattern in PHP — a simple entry point hiding a whole subsystem. Placing an order with a single line.

PHP Flyweight Design Pattern Structural Pattern

PHP Flyweight Pattern

A short screencast: the Flyweight pattern in PHP — repeating state is shared between objects through a cache.

PHP Proxy Design Pattern Structural Pattern

PHP Proxy Pattern

A short screencast: the Proxy pattern in PHP — a surrogate object controls access and adds lazy loading with caching.

Behavioral

Interaction patterns: how objects communicate and share responsibilities.

PHP Chain of Responsibility Design Pattern Behavioral Pattern

PHP Chain of Responsibility Pattern

A short screencast: the Chain of Responsibility pattern in PHP — a request travels along a chain of handlers until one of them handles it.

PHP Command Design Pattern Behavioral Pattern

PHP Command Pattern

A short screencast: the Command pattern in PHP — a request becomes an object, and the invoker only calls its execution.

PHP Interpreter Design Pattern Behavioral Pattern

PHP Interpreter Pattern

A short screencast: the Interpreter pattern in PHP — a grammar is expressed as a tree of objects, and every node evaluates itself.

PHP Iterator Design Pattern Behavioral Pattern

PHP Iterator Pattern

A short screencast: the Iterator pattern in PHP — a uniform way to traverse a collection without exposing its internals.

PHP Mediator Design Pattern Behavioral Pattern

PHP Mediator Pattern

A short screencast: the Mediator pattern in PHP — objects communicate through a mediator instead of talking to each other directly.

PHP Memento Design Pattern Behavioral Pattern

PHP Memento Pattern

A short screencast: the Memento pattern in PHP — capture an object state so you can roll back to it later.

PHP Observer Design Pattern Behavioral Pattern

PHP Observer Pattern

A short screencast: the Observer pattern in PHP — a publisher notifies subscribers about changes.

PHP State Design Pattern Behavioral Pattern

PHP State Pattern

A short screencast: the State pattern in PHP — an object behavior changes depending on its current state.

PHP Strategy Design Pattern Behavioral Pattern

PHP Strategy Pattern

A short screencast: the Strategy pattern in PHP — swap algorithms at runtime without changing the client.