How PHP defines classes, member properties and their operations and magic methods

Definition and properties of PHP classes

I. Definition of Class
Class is defined by the keyword definition using class:
Cases:
Class test{

}

The properties and methods of class Ii.

Class test{

$name = ' LH '; Member Properties ...

Member methods .....
Public Function T1 () {

}

}
Iii. defining a class that cannot be inherited

Final class test{


}
The final keyword can only decorate classes and methods, and cannot be used to decorate member properties!

Iv. declarations of classes, member properties, and methods

1, public//Common for global, class internal and external subclasses can access
2, protected//protected only in this class or subclass or the parent class can access
3, private/proprietary only within the class can be called
4. Var://php 5 will consider this member property to be of type public
5, Static://define static properties use the Self:: member property name in the method class

Five, Magic method

Note: The Magic method must be defined as public, and all other magic methods must be so
1, __construct () construction method
2, __destruct () Destruction method
3, __clone () cloning
4. The __tostring () method is called automatically when an object is converted to a string, such as when using Echo to print an object
5, __sleep () serialization of the time with
6, __wakeup crossdress when the call
7, __set_state () when calling Var_export (), this static method is called (Valid from PHP 5.1.0)
8, __invoke (PHP 5.3.0 or later) when an attempt is made to invoke an object in a way that invokes a function, the __invoke method is called automatically.
9, __callstatic (PHP 5.3.0 or later) is to handle static method calls
10, __get () when an undefined property is called, this method is triggered, and the passed parameter is the name of the property being accessed.
11, __set () when assigning a value to an undefined property, this method is triggered, and the passed parameter is the property name and value that is set.
12, __isset ()
13, __call ($method, $arg _array) when calling an undefined method is to call this method
14, __autoload () Automatic loading Magic method













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How PHP defines classes, member properties and their operations and magic methods