Strategy is a behavioral design pattern that lets you define a family of algorithms, put each of them into a separate class, and make their objects interchangeable. Learn more here.
This example demonstrates the Strategy Pattern, encapsulating arithmetic operations such as addition, subtraction, and multiplication within separate strategies.
In a real-world scenario, this approach can be used to delegate tasks like calculating the shipping cost of an order. For example, a seller might choose between different pricing strategies, such as a per-unit cost or a fixed fee. When a new pricing model is needed, a new strategy can be implemented while maintaining a consistent interface, ensuring the codebase remains flexible, organized, and easily extendable.
This example can be run using Docker. Build and start the container with the docker compose up command, log in and run the php client.php command.