I'm currently working on a PHP project and I'm looking to implement the observer design pattern in my classes. I've heard that this pattern can help me maintain loose coupling between objects and improve the modularity of my code. However, I'm not entirely sure how to go about it.
From what I understand, the observer design pattern involves a subject object maintaining a list of its dependents (observers) so that they can be notified automatically of any state changes. But how exactly do I implement this in my PHP classes?
I would really appreciate it if someone could guide me through the process of implementing the observer design pattern in PHP classes. Are there any best practices or common pitfalls that I should be aware of? Additionally, it would be great if you could provide some code examples or point me to some resources that can help me understand and implement this pattern effectively.
Thanks in advance for your help!