Hello, fellow coder! Today, we'll decode PHP's Abstraction principle, a powerful tool in Object-Oriented Programming. Abstraction is our ally against seemingly overwhelming complexity, revealing only the necessary details. Are you ready for the fun?

Imagine abstraction as a superboat, stripping off complexities and giving you just the essentials to operate effectively. It’s not about understanding all the intricate details; it is about focusing on what truly matters. Consider it this way — to drive a car, you only engage with its external controls, while the complex workings beneath remain hidden.

In PHP, objects are defined through classes. Every class serves as a preliminary blueprint for an object. It stipulates both the data (attributes) and their potential behaviors (methods). Similar to a car’s control panel, an object’s class provides a user-friendly interface, concealing the complex mechanics within.

Let's demonstrate with a simple example. When you use a built-in PHP array, you can call functions like count(), array_push(), or array_merge(). You use these functions without needing to know how PHP manages the array's memory space internally. The complexities are abstracted away.

In PHP, classes that possess abstract methods are termed "abstract classes." An abstract class is like the pearl inside an oyster, housing at least one abstract method. Each abstract method in an abstract class awaits its implementation in subclasses. Any class inheriting an abstract class must implement all its abstract methods.