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Observer Design Pattern In PHP

Observer design pattern in PHP to notify all the objects to update themselves when an object state gets changed.

Observer design pattern In PHP implementation


Inside ConcreteObserverA::Update()
State = 1
Inside ConcreteObserverB::Update()
State = 1

Suresh Kumar Srivastava is founder of online learning site coursegalaxy.com and author of popular books "C In Depth", "Data Structures Through C In Depth". He has 18+ years experience in industry and worked on architecture and design of multiple products. This article is from his courses on Design Patterns.