How to call the method inside the php class class

PHP, as a popular programming language, is widely used in the field of web development. In PHP, a class is an important structure that allows developers to define their own data types and encapsulate data and operations, thereby improving the maintainability and reusability of the code. The internal function calling method of a class is a common technology in use. This article will introduce the specific implementation method.

1. Common methods of calling internal functions of a class

1. Direct call

Internal functions in a class can directly call other functions An internal function, this method is the simplest and most intuitive. In a class member function, use $this to call another member function.

The following is a simple example:

class MyClass {
   public function func1() {
      // func1的代码 ...
   }

   public function func2() {
      $this->func1();
   }
}

$obj = new MyClass();
$obj->func2();

In the above code, you can see how func2() directly calls func1().

2. Using self

Another calling method is to use the self keyword. This method calls the static method in the class through the class name, which is more readable and maintainable than calling it directly.

The following is an example of using the self keyword:

class MyClass {
   public function func1() {
      // func1的代码 ...
   }

   public function func2() {
      self::func1();
   }
}

$obj = new MyClass();
$obj->func2();

In the above code, you can see how func2() uses the self keyword to call func1().

3. Using $This

Another calling method is to use the $This variable. This method is usually used to call child class methods from the parent class.

The following is an example of using the $This variable:

class MyClass {
   public function func1() {
      // func1的代码 ...
   }
}

class MyChildClass extends MyClass {
   public function func2() {
      $this->func1();
   }
}

$obj = new MyChildClass();
$obj->func2();

In the above code, you can see how the MyChildClass class uses the $This variable to call the method func1() of its parent class.

2. Summary

This article introduces the internal function calling methods of PHP classes, including direct calling, using the self keyword and using the $This variable. These methods are commonly used in practice. During development, developers can choose a method that suits them according to their needs to call internal functions of a class.

In general, although class internal function calls are simple, some details still need to be paid attention to. Developers need to properly verify and process the called functions and parameters. In particular, when passing parameters, they need to pay attention to the parameter type, transfer method and return value processing. Only by properly handling these issues can we write high-quality PHP code.

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