How to call its own static method in php

In PHP, calling its own static method is a very common operation. This usually happens when a static method needs to be accessed through the class itself, or when a static method needs to be called between different methods of the same class. In this article, we will learn how to call its own static methods in PHP.

First, let’s take a look at what a static method is. Static methods are methods that do not require an instantiation of the class in order to be used; they are called through the class itself. In PHP, we can use the keyword "static" to define static methods. Here is an example:

class MyClass {
    public static function myStaticMethod() {
        echo "这是一个静态方法";
    }
}

In this example, we define a static method called "myStaticMethod". Now, we can call it in the following way:

MyClass::myStaticMethod();

Okay, now that we know how to define and call static methods, next we will demonstrate how to call its own static methods in PHP.

In PHP, we can use the keyword "self" to refer to the class itself. When we call a static method, we can use "self" to refer to the class as follows:

class MyClass {
    public static function myStaticMethod() {
        echo "这是一个静态方法";
    }
    
    public static function myOtherStaticMethod() {
        self::myStaticMethod();
    }
}

In this example, we have defined two static methods, "myStaticMethod" and "myOtherStaticMethod" . We then use "self" in "myOtherStaticMethod" to call "myStaticMethod".

Now, we can call "myOtherStaticMethod" in the following way:

MyClass::myOtherStaticMethod();

When we call "myOtherStaticMethod", "myStaticMethod" will also be called and output "This is a static method ".

Sometimes in a class, we need to call method B in method A, and method B is a static method. We can use the self keyword, for example:

class Example {
    public static function methodA() {
        self::methodB();
    }

    public static function methodB() {
        // some code
    }
}

In this example , we use "self" in method "methodA" to call method "methodB". This allows us to call static methods in a class without instantiation.

To summarize, calling its own static method is a common operation in PHP. This usually occurs when a static method needs to be accessed through the class itself, or when it needs to be called between different methods of the same class. When using static methods. We can use the keyword "self" to refer to the class and call the static methods in the class.

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