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This article mainly introduces the php object-oriented example analysis, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

I. introduction to object-oriented

1. What is process-oriented

The realization of the specific words, the details are clear. For example, if an employee wants to assemble a computer, he has to do this, purchase, bargain, transport back to the company, wiring. Wait for a series of specific processes.

2. Object-oriented

Abstract implementation, regardless of the specific implementation details. For example, a boss asked his employees to buy computers, and then it was over. The specific implementation allows the staff to do it, but the boss does not have to manage it.

The transition from process-oriented to object-oriented makes the development of programs transfer from specific business logic to real modeling entities, which is more in line with the world around us.

Second, object-oriented features

1. Encapsulation

Hide the specific implementation details and retain only a small number of external interfaces. For example: the computer is composed of motherboard, CPU, graphics card, memory, etc. It is encapsulated through the chassis and communicated only through the interface.

2. Inheritance

One class inherits another's field live method, and so on.

3. Polymorphism

For example:

There is an action 'minus'. The barber uses this action to cut his hair, the boss uses this action to lay off staff, and the gardener uses this action to repair flowers and plants.

Polymorphism is generally used to standardize interfaces and to apply to inheritance, which requires some architectural experience.

Key object-oriented concepts

1. Class

Class is the definition of an object. Contains the methods and fields of this object.

2. Object

Class instantiation is object instantiation.

3. Fields

Like computer brands. Computer model

4. Attributes

For example, set the brand and model of the computer.

5. Methods

Such as turning on the computer.

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