代理模式
在客户端和实体之间建立一个代理对象,客户端对实体的操作全部委派给代理对象,隐藏实体具体实现细节。
Proxy还可以与业务代码分离,部署到另外的服务器,业务代码中通过RPC来委派任务。
代理Proxy.php:
<?php namespace Components\Proxy; class Proxy implements IUserProxy { function get($id) { $db = \Components\Register::get('slave'); $db->query('select name from users where id ='.$id); } function set($id, $name) { $db = \Components\Register::get('master'); $db->query("update users set name=$name where id =$id"); } }
<?php namespace Components\Proxy; interface IUserProxy { function get(); function set(); }
/* 代理模式 适用于类似主从 */ $proxy = new Proxy(); $proxy->get('1'); $proxy->set('1', 'php');
装饰器模式
在不必改变原类文件和使用继承的情况下,动态地扩展一个对象的功能。它是通过创建一个包装对象,也就是装饰来包裹真实的对象。
装饰器接口IDecorator.php:
<?php namespace Components\Decorator; /** * 装饰器模式 接口 * @author WH * */ interface IDecorator { function before(); function after(); }
<?php namespace Components\Decorator; class DecoratorAttr1 implements IDecorator{ function before() { echo '<br><div style="color:red">'; } function after() { echo '</div>'; } }
<?php namespace Components\Decorator; class DecoratorAttr2 implements IDecorator{ function before() { echo '<br><div style="font-size:30px">'; } function after() { echo '</div>'; } }
/* 装饰器模式 原类 */ class DecoratorClassTest { protected $decorators = array(); //添加装饰器 function addDecorator(\Components\Decorator\IDecorator $decorator) { $this->decorators[] = $decorator;//添加装饰器 } function before(){ foreach ($this->decorators as $decorator) { $decorator->before();//调用装饰器 } } function after(){ //这里可用栈 $decorators = array_reverse($this->decorators); foreach ($decorators as $decorator) { $decorator->after();//结束装饰器 } } function test() { $this->before(); echo 'running<be>'; $this->after(); } }
$decoratorTest = new DecoratorClassTest(); $decoratorTest->addDecorator(new \Components\Decorator\DecoratorAttr1()); $decoratorTest->addDecorator(new \Components\Decorator\DecoratorAttr2()); $decoratorTest->test();
原文地址:http://blog.csdn.net/fb408487792/article/details/46574711