What are static methods and ordinary methods in php

In PHP, static methods are defined in a class and modified by the static keyword. They only belong to the class itself and are not methods of objects of this class; ordinary methods are defined in a class. , a method that can be called for all objects of this class.

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Ordinary method (instance method)

A method defined in a class can be called for all objects of this class. It can also be understood that all objects of this class have their own method;

Definition form:

class 类名{ function 方法名(形参1，形参2，.... ){ //方法体。。。 } }

Calling form:

$对象名->方法名(实参1，实参2，....）；

Static method

The method defined in a class only belongs to the class itself, not to the objects of this class .

Definition form:

class 类名{ static function 方法名(形参1，形参2，.... ){ //方法体。。。 } }

Calling form:

类名：：方法名(实参1，实参2，....）；

Example (comprehensive example of properties and methods)

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