PHP magic methods Magic methods in PHP classes

Definition:

Methods starting with two underscores "__" in a PHP class are called magic methods.

Category:

For example: Construction method: __construct; Destruction method: __destruct; Dynamic overloading: __set(), __get(), __call(), __callStatic(); Object cloning: __clone()

Application scenarios :

1. When the program attempts to modify a non-existent or invisible class attribute, the PHP engine will call the __set() method, of course, provided that the method is defined in the class. The definition format of __set() is as follows:

function __set($name,$value){

                                                                                                                                                                                                  .

2. When the program tries to read a non-existent or invisible class attribute, the PHP engine will call the __get() method, of course, provided that the method is defined in the class. The definition format of __get() is as follows:

function __get($name){

            // Implementation details

    }                                                                             ’

3. When the program tries to call a non-existent or invisible class method, the PHP engine will call the __call() method, of course, provided that the method is defined in the class. The definition format of the __call() method is as follows:

function __call($name,$args){

, exists in the form of an array.

4. Starting from PHP5.3.0, you can use __callStatic() to dynamically create static methods. The definition format of __callStatic() is as follows:

Function __callStatic($name,$args){

                                                                    to ’s ’s __callStatic’s __callStatic's __callStatic's __callStatic('s-to-know-to-result to __callStatic() to function __callStatic($name,$args) {

Exists in the form of an array.

5. Once the __clone() method is defined, the class will automatically call it when it is copied, so that we can re-open memory for the reference attributes in the __clone() method. The definition format of __clone() is as follows:

function __clone(){

//Implementation details

}

The above has introduced the PHP magic methods in the PHP class, including the content of PHP magic methods. I hope it will be helpful to friends who are interested in PHP tutorials.