Category: OOP

Reuse and extend behavior by creating child classes from parent classes.

Add behavior to classes with methods — functions that operate on object state.

Initialize objects with __construct when they are created.

Run cleanup logic with __destruct when an object is destroyed.

Use $this to access the current object’s properties and methods.

Control visibility of properties and methods with public, private, and protected.

Choose the right visibility for each property and method.

Understand OOP as a style of programming based on objects that combine data and behavior.

Compare step-by-step procedural code with object-oriented structure.

See why teams use OOP: reuse, modularity, maintainability, and clearer domain modeling.