什么是php中的简单示例封装? [英] What is encapsulation with simple example in php?

问题描述

什么是php中的简单示例封装?

What is encapsulation with simple example in php?

推荐答案

封装只是将一些数据包装在对象中.术语封装"通常与信息隐藏"互换使用. Wikipedia有一篇相当详尽的文章.

Encapsulation is just wrapping some data in an object. The term "encapsulation" is often used interchangeably with "information hiding". Wikipedia has a pretty thorough article.

以下是:

<?php

class App {
     private static $_user;

     public function User( ) {
          if( $this->_user == null ) {
               $this->_user = new User();
          }
          return $this->_user;
     }

}

class User {
     private $_name;

     public function __construct() {
          $this->_name = "Joseph Crawford Jr.";
     }

     public function GetName() {
          return $this->_name;
     }
}

$app = new App();

echo $app->User()->GetName();

?>

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