装饰器模式

原创
2017/04/05 17:08
阅读数 44

 框架路由中间件常用到

<?php

interface RendererInterface
{
	public function renderData();
}

abstract class Decorator implements RendererInterface
{
	protected $wrapped;
	public function __construct(\RendererInterface $wrapped){
		$this->wrapped = $wrapped;
	}
}

class RenderInXml extends Decorator{
	public function renderData(){
		$arr = $this->wrapped->renderData();
		$xml = "<xml>";
        foreach ($arr as $key=>$val)
        {
            if (is_numeric($val)){
                $xml.="<".$key.">".$val."</".$key.">";
            }else{
                 $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
            }
        }
        $xml.="</xml>";
        return htmlspecialchars($xml);
	}
}

class RenderInJson extends Decorator{
	
	public function renderData(){
		return json_encode($this->wrapped->renderData());
	}
}

class Webservice implements RendererInterface
{
	protected $data;
	public function __construct($data){
		$this->data=$data;
	}
	public function renderData(){
		return $this->data;
	}
}
$web = new Webservice(['name'=>'zs','age'=>23]);

echo (new RenderInJson($web))->renderData();

echo (new RenderInXml($web))->renderData();





 

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