装饰器模式

来源：互联网发布：域名注册哪个服务器好编辑：程序博客网时间：2024/06/09 18:31

<?php

//场景：BaseArt为父类，其他的（BianArt、SEOArt）为其子类，之后增加的子类的内容都要连在一起输出

//装饰器模式做文章修饰功能
class BaseArt {
   protected $content;

   protected $art = null;

   public function __construct($content) {
       $this->content = $content;
   }

   public function decorator() {
       return $this->content;
   }
}

//编辑文章摘要
class BianArt extends BaseArt {
   public function __construct(BaseArt $art) {
       $this->art = $art;
       $this->decorator();
   }

   public function decorator() {
       return $this->content = $this->art->decorator() . '文章摘要';
   }
}

//SEO关键词
class SEOArt extends BaseArt {
   public function __construct(BaseArt $art) {
       $this->art = $art;
       $this->decorator();
   }

   public function decorator() {
       return $this->content = $this->art->decorator() . 'SEO关键词';
   }
}

$b = new SEOArt(new BianArt(new BaseArt('天天向上')));
echo $b->decorator();//天天向上文章摘要SEO关键词

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