What is the main difference between abstract methods and ordinary methods in php

The main difference between abstract methods and ordinary methods:

Abstract methods do not have a method body.

Supplement:

What is a method body?

The method body is the code block of a method, that is, the part wrapped in curly braces.

Keywords for declaring abstract methods:

The keyword abstract is used to declare an abstract method.

As shown: (Recommended learning video: php video tutorial)

##Other features of abstract methods:

1. If a class contains abstract methods, the class must be declared as an abstract class;

2. Abstract classes cannot be instantiated, but can only be inherited and implement the abstraction. All abstract methods of the class.

Summary of the use of abstract methods:

1. Abstract methods have no method body;

2. The keyword abstract is used to declare an abstract method;

3. Classes containing abstract methods must be declared as abstract classes;

4. Abstract classes cannot be instantiated.

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