PHP设计模式之 装饰模式

<?php  
           
/** 构件接口类      
 *  interface IComponent          
 */     
interface IComponent  
{  
    function Display();  
}  
  
/** 人物类     
 *  Person         
 */    
Class Person implements IComponent  
{  
    private $name;  
  
    function __construct($name)  
    {  
        $this->name = $name;  
    }  
  
    function Display()  
    {  
        echo "{$this->name}当前装备：";  
    }  
  
}  
  
/** 装备类    
 *  Equipment         
 */   
Class Equipment implements IComponent  
{  
    protected $component;  
  
    function Decorator(IComponent $component)  
    {  
        // 动态添加  
        $this->component = $component;  
    }  
  
    function Display()  
    {  
        if(!empty($this->component)){  
            $this->component->Display();  
        }  
    }     
}  
  
  
/** 具体装备 武器类    
 *  Weapon        
 */   
Class Weapon extends Equipment  
{  
    function Display(){  
        parent::Display();  
        echo "龙泉剑 ";  
    }  
}  
  
/** 具体装备 戒指类    
 *  Ring        
 */   
Class Ring extends Equipment  
{  
    function Display(){  
        parent::Display();  
        echo "复活戒指 ";  
    }  
}  
  
/** 具体装备 鞋子类    
 *  Shoes       
 */   
Class Shoes extends Equipment  
{  
    function Display(){  
        parent::Display();  
        echo "御风履 ";  
    }  
}  
  
// 如果需要可以继续添加具体的装备 腰带 裤子 手镯

<?php  
  
// 装饰器模式 index.php  
header("Content-Type:text/html;charset=utf-8");  
require_once "Decorator.php";  
  
// 创建人物  
$people = new Person("战士");  
  
// 武器  
$Weapon = new Weapon();  
// 戒指  
$Ring = new Ring();  
// 鞋子  
$Shoes = new Shoes();  
  
// 动态添加函数  
$Weapon->Decorator($people);  
$Ring->Decorator($Weapon);  
$Shoes->Decorator($Ring);  
  
// 显示  
$Shoes->Display();

战士当前装备：龙泉剑 复活戒指 御风履