装饰器模式

1 <?php 2 //装饰器模式-在不改变原有类的结构上，对类的功能那个作补充 3  4 //武器基类 5 abstract class Weapon{ 6     abstract public function descriptions(); 7     abstract public function cost(); 8 } 9 10 //剑类11 class Glave extends Weapon{12     public function descriptions(){13         return 'Glave';14     }15     16     public function cost(){17         return "100";18     }19 }20 21 //匕首类22 class Knife extends Weapon{23     public function descriptions(){24         return __CLASS__;25     }26     public function cost(){27         return "80";28     }29 }30 31 //斧类32 class Axe extends Weapon{33     public function descriptions(){34         return  __CLASS__;35     }36     public function cost(){37         return "200";38     }39 }40 41 //属性类42 class Property extends Weapon{43     protected $_weapon = null;44     protected $_price = 0;45     protected $_descriptions = '';46     public function __construct(Weapon $weapon){47         $this->_weapon = $weapon;48     }49     public function cost(){50         return     $this->_weapon->cost() + $this->_price;51     }52     53     public function descriptions(){54         return $this->_weapon->descriptions().$this->_descriptions;55     }56 }57 58 //力量属性59 class Strength extends Property{60     protected $_price = 30;61     protected $_descriptions = '+ Strength';62 }63 64 //敏捷属性65 class Agility extends Property{66     protected $_price = 50;67     protected $_descriptions = '+ Agility';68 }69 70 //智力属性71 class Intellect extends Property{72     protected $_price = 20;73     protected $_descriptions = '+ Intellect';74 }75 76 $weapon = new Agility(new Strength(new Strength(new Glave())));77 echo $weapon->cost();78 echo $weapon->descriptions();