面试题与答案

OOP is a programming paradigm that uses objects, which are instances of classes, to organize and structure code.

The four pillars of OOP are encapsulation, inheritance, polymorphism, and abstraction.

Encapsulation is the bundling of data and methods that operate on the data into a single unit, i.e., a class.

Inheritance allows a class to inherit properties and methods from another class. It promotes code reusability.

Polymorphism allows objects of different classes to be treated as objects of a common base class. It includes method overloading and overriding.

Abstraction involves hiding the complex implementation details and showing only the necessary features of an object.

A class is a blueprint for creating objects. It defines properties (attributes) and methods that the objects will have.

You can instantiate an object using the 'new' keyword followed by the class name. For example: $object = new MyClass();