Behavioral patterns tackle the challenge of communication between various objects. They describe how different objects and classes send messages to each other to make things happen. The following is a list of patterns we categorize as behavioral patterns:
Chain of responsibility
Command
Interpreter
Iterator
Mediator
Memento
Observer
State
Strategy
Template method
Visitor
The chain of responsibility pattern decouples the sender of a request from its receiver, by enabling more than one object to handle requests, in a chain manner. Various types of handling objects can be added dynamically to the chain. Using a recursive composition chain allows for an unlimited number of handling objects.
The following is an example of chain of responsibility pattern implementation:
abstract class SocialNotifier {
private $notifyNext = null;
public function notifyNext(SocialNotifier $notifier) {
$this->notifyNext = $notifier;
return $this->...