What is the symbol for calling class methods in php

PHP is a very popular programming language and it is widely used for web application development. In PHP programming, we often need to call class methods to implement various functions. When calling class methods, we need to use some specific symbols to achieve it.

There are two main types of symbols for calling class methods in PHP: arrow symbols and double colon symbols. Below we will introduce the use of these two symbols in detail.

1. Arrow symbol (->)

The arrow symbol is the most commonly used symbol for calling class methods in PHP. Its use is very simple, just use the arrow symbol between the class object and the method. For example:

$myObj = new MyClass();
$myObj->myMethod();

In the above example, $myObj is an object of the MyClass class, and myMethod() is a method in the MyClass class. The arrow symbol is the symbol used to connect the two.

It should be noted that arrow symbols can only be used to call object methods and cannot be used to call static methods. If you want to call a static method, you need to use double colon notation.

2. Double colon symbol (::)

The double colon symbol is mainly used to call static methods in PHP. Unlike the arrow notation, when calling a static method you need to use a double colon notation between the class name and the method name. For example:

MyClass::myStaticMethod();

In the above example, myStaticMethod() is a static method of the MyClass class, and you need to use the double colon symbol when calling it.

It should be noted that arrow symbols can only be used to call object methods and cannot be used to call static methods. The double colon symbol can only be used to call static methods, not object methods.

3. Summary

Through the above introduction, we can know that in PHP programming, to call a class method, you need to use arrow symbols or double colon symbols. Arrow notation is used to call object methods, while double colon notation is used to call static methods. It should be noted that these two symbols cannot be mixed. If you try to use the wrong symbol, you will cause a program error.

So, in PHP programming, we need to choose the correct symbol to call class methods according to the actual situation. Only by using these symbols correctly can we achieve the functions we want.

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