Design patterns in PHP

• What are design patterns in PHP?
• Abstract factory
• Adapter
• Bridge
• Builder
• Chain of responsibility
• Command
• Composite
• Decorator
• Dependency injection
• Facade
• Flyweight
• Interpreter
• Iterator
• Lazy loading
• Mediator
• Memento
• Mock object
• Null object
• Object pool
• Observer
• Prototype
• Proxy design pattern
• Servant design pattern
• Singleton design pattern
• State design pattern
• Strategy design pattern
• Template method
• Type tunnel design pattern
• Visitor design pattern