GitHub - marcelgsantos/learning-oop-in-php: A collection of resources to learn object-oriented programming and related concepts for PHP developers.Object-oriented programming advanced tutorials. What Are Abstract Classes? - A tutorial explaining abstract classes in PHP. Abstract Classes and Interfaces (►) - Introduction about abstract classes and interfaces. When should I code to an Interface? - A tutorial explaining what is and when to use interfaces in PHP. Understanding and Applying Polymorphism in PHP - A tutorial explaining about abstra
