PHP Object-Oriented Programming

This article mainly describes PHP object-oriented programming methods. In PHP, we can use classes like C ++ and C # To encapsulate some of the methods we commonly use and then call them when instantiating them.

Constructor:

Class mypc {

Function _ construct (){

Initialization

}

}

 

Destructor:

Class mypc {

......

Function _ destruct (){

......

}

}

 

Encapsulation keywords: public, protected, private

Encapsulate related functions: __set (), _ Get ()

 

_ Set (): Obtain the private attributes encapsulated in the current class or re-execute or assign values to the methods.

 

_ Set ($ name, $ value)

 

_ Get () gets the encapsulated attributes or methods in the current class and converts them to common attributes.

 

_ Get ()

 

Eg:

<? PHP

Class mypc

{

Private
$ Name;

Public
$ Type;

Function
_ Construct ($ name = '')

{

Return
$ This-> name = $ name;

}

 

Private
Function power ()

{

Return
$ This-> name. "power on, starting ...";

}

 

Function _ Get ($ name)

{

Return
$ This-> name ."---";

}

 

Function _ set ($ N, $ V)

{

If ($ v> = 100)

$ This-> $ n = $ V;

}

}

 

$ PC1 = new mypc ('My pc ');

$ PC1-> name = 30;

Echo $ pC1-> name;

?>

 

Inheritance Keyword: extends

 

Base Class Name: Method Name

 

Abstract keywords: Abstract

At least one method in a class is abstract, which is called an abstract class.

Therefore, if an abstract class is defined, the abstract method is first defined.