Detailed explanation of the implementation and usage of PHP decorator pattern

This article mainly introduces the implementation and usage of PHP simple decorator mode, and analyzes the principle, implementation and usage of PHP decorator mode in the form of specific examples. Friends in need can refer to it

The details are as follows ：

<?php
//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
//武器基类
abstract class Weapon{
  abstract public function descriptions();
  abstract public function cost();
}
//剑类
class Glave extends Weapon{
  public function descriptions(){
    return &#39;Glave&#39;;
  }
  public function cost(){
    return "100";
  }
}
//匕首类
class Knife extends Weapon{
  public function descriptions(){
    return __CLASS__;
  }
  public function cost(){
    return "80";
  }
}
//斧类
class Axe extends Weapon{
  public function descriptions(){
    return __CLASS__;
  }
  public function cost(){
    return "200";
  }
}
//属性类
class Property extends Weapon{
  protected $_weapon = null;
  protected $_price = 0;
  protected $_descriptions = &#39;&#39;;
  public function __construct(Weapon $weapon){
    $this->_weapon = $weapon;
  }
  public function cost(){
    return   $this->_weapon->cost() + $this->_price;
  }
  public function descriptions(){
    return $this->_weapon->descriptions().$this->_descriptions;
  }
}
//力量属性
class Strength extends Property{
  protected $_price = 30;
  protected $_descriptions = &#39;+ Strength&#39;;
}
//敏捷属性
class Agility extends Property{
  protected $_price = 50;
  protected $_descriptions = &#39;+ Agility&#39;;
}
//智力属性
class Intellect extends Property{
  protected $_price = 20;
  protected $_descriptions = &#39;+ Intellect&#39;;
}
$weapon = new Agility(new Strength(new Strength(new Glave())));
echo $weapon->cost();
echo $weapon->descriptions();

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