Type Hinting and Dependency Injection
Explore how type hinting enhances dependency injection in PHP by enforcing object types through interfaces. Understand injecting dependencies via constructors and setter methods to build flexible and maintainable code. This lesson guides you through practical examples using Driver interfaces and Car classes to apply these object-oriented programming principles effectively.
We'll cover the following...
We'll cover the following...
Type hinting injected objects
Though type hinting is not necessary for dependency injection, it is preferred in situations when we want to check the dependency of the main class on types of objects. In our example, we expect any Driver class that uses the Car object to also have a sayYourName() method. To do that, let’s create a Driver ...