中介者: 中介者设计莫用于开发一个对象，这个对象能够在类似对象相互之间不直接交互的情况下传送或调节对这些对象的集合的修改
处理具有类似属性并且属性需要保持同步的非耦合对象时，最佳的做法是使用基于中介者设计模式的对象。
<ol class="dp-c"><li class="alt"><span><span><?php </span></span></li><li><span> <span class="comment">/** </span> </span></li><li class="alt"><span><span class="comment"> * 测试用例描述：示例代码不仅允许乐队进入和管理他们的音乐合集，而且还允许乐队更新他们的配置文件，修改乐队相关信息以及更新其CD信息 </span> </span></li><li><span><span class="comment"> * 现在，艺术家可上传MP3集合并从Web站点撤下CD。 因此， Web站点需要保持相对应的CD和MP3彼此同步。 </span> </span></li><li class="alt"><span><span class="comment"> */</span><span> </span></span></li><li><span> <span class="comment">//CD类 </span><span> </span></span></li><li class="alt"><span> <span class="keyword">class</span><span> CD { </span></span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">public</span><span> </span><span class="vars">$band</span><span> = </span><span class="string">''</span><span>; </span></span></li><li><span> <span class="keyword">public</span><span> </span><span class="vars">$title</span><span> = </span><span class="string">''</span><span>; </span></span></li><li class="alt"><span> <span class="keyword">protected</span><span> </span><span class="vars">$_mediator</span><span>; </span></span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> __construct(MusicContainerMediator </span><span class="vars">$mediator</span><span> = NULL) { </span></span></li><li><span> <span class="vars">$this</span><span>->_mediator = </span><span class="vars">$mediator</span><span>; </span></span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> save() { </span></span></li><li><span> <span class="comment">//具体实现待定 </span><span> </span></span></li><li class="alt"><span> var_dump(<span class="vars">$this</span><span>); </span></span></li><li><span> } </span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> changeBandName(</span><span class="vars">$bandname</span><span>) { </span></span></li><li class="alt"><span> <span class="keyword">if</span><span> ( ! </span><span class="func">is_null</span><span>(</span><span class="vars">$this</span><span>->_mediator)) { </span></span></li><li><span> <span class="vars">$this</span><span>->_mediator->change(</span><span class="vars">$this</span><span>, </span><span class="keyword">array</span><span>(</span><span class="string">"band"</span><span> => </span><span class="vars">$bandname</span><span>)); </span></span></li><li class="alt"><span> } </span></li><li><span> <span class="vars">$this</span><span>->band = </span><span class="vars">$bandname</span><span>; </span></span></li><li class="alt"><span> <span class="vars">$this</span><span>->save(); </span></span></li><li><span> } </span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="comment">//MP3Archive类 </span><span> </span></span></li><li><span> <span class="keyword">class</span><span> MP3Archive { </span></span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">protected</span><span> </span><span class="vars">$_mediator</span><span>; </span></span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> __construct(MusicContainerMediator </span><span class="vars">$mediator</span><span> = NULL) { </span></span></li><li class="alt"><span> <span class="vars">$this</span><span>->_mediator = </span><span class="vars">$mediator</span><span>; </span></span></li><li><span> } </span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> save() { </span></span></li><li class="alt"><span> <span class="comment">//具体实现待定 </span><span> </span></span></li><li><span> var_dump(<span class="vars">$this</span><span>); </span></span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> changeBandName(</span><span class="vars">$bandname</span><span>) { </span></span></li><li><span> <span class="keyword">if</span><span> ( ! </span><span class="func">is_null</span><span>(</span><span class="vars">$this</span><span>->_mediator)) { </span></span></li><li class="alt"><span> <span class="vars">$this</span><span>->_mediator->change(</span><span class="vars">$this</span><span>, </span><span class="keyword">array</span><span>(</span><span class="string">"band"</span><span> => </span><span class="vars">$bandname</span><span>)); </span></span></li><li><span> } </span></li><li class="alt"><span> <span class="vars">$this</span><span>->band = </span><span class="vars">$bandname</span><span>; </span></span></li><li><span> <span class="vars">$this</span><span>->save(); </span></span></li><li class="alt"><span> } </span></li><li><span> } </span></li><li class="alt"><span> <span class="comment">//中介者类 </span><span> </span></span></li><li><span> <span class="keyword">class</span><span> MusicContainerMediator { </span></span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">protected</span><span> </span><span class="vars">$_containers</span><span> = </span><span class="keyword">array</span><span>(); </span></span></li><li class="alt"><span> </span></li><li><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> __construct() { </span></span></li><li class="alt"><span> <span class="vars">$this</span><span>->_containers[] = </span><span class="string">"CD"</span><span>; </span></span></li><li><span> <span class="vars">$this</span><span>->_containers[] = </span><span class="string">"MP3Archive"</span><span>; </span></span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">public</span><span> </span><span class="keyword">function</span><span> change(</span><span class="vars">$originalObject</span><span>, </span><span class="vars">$newValue</span><span>) { </span></span></li><li><span> <span class="vars">$title</span><span> = </span><span class="vars">$originalObject</span><span>->title; </span></span></li><li class="alt"><span> <span class="vars">$band</span><span> = </span><span class="vars">$originalObject</span><span>->band; </span></span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">foreach</span><span> (</span><span class="vars">$this</span><span>->_containers </span><span class="keyword">as</span><span> </span><span class="vars">$container</span><span>) { </span></span></li><li><span> <span class="keyword">if</span><span> ( ! (</span><span class="vars">$originalObject</span><span> instanceof </span><span class="vars">$container</span><span>)) { </span></span></li><li class="alt"><span> <span class="vars">$object</span><span> = </span><span class="keyword">new</span><span> </span><span class="vars">$container</span><span>; </span></span></li><li><span> <span class="vars">$object</span><span>->title = </span><span class="vars">$title</span><span>; </span></span></li><li class="alt"><span> <span class="vars">$object</span><span>->band = </span><span class="vars">$band</span><span>; </span></span></li><li><span> </span></li><li class="alt"><span> <span class="keyword">foreach</span><span> (</span><span class="vars">$newValue</span><span> </span><span class="keyword">as</span><span> </span><span class="vars">$key</span><span> => </span><span class="vars">$val</span><span>) { </span></span></li><li><span> <span class="vars">$object</span><span>-></span><span class="vars">$key</span><span> = </span><span class="vars">$val</span><span>; </span></span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="vars">$object</span><span>->save(); </span></span></li><li><span> } </span></li><li class="alt"><span> } </span></li><li><span> } </span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> <span class="comment">//测试实例 </span><span> </span></span></li><li><span> <span class="vars">$titleFromDB</span><span> = </span><span class="string">"Waste of a Rib"</span><span>; </span></span></li><li class="alt"><span> <span class="vars">$bandFromDB</span><span> = </span><span class="string">"Never Again"</span><span>; </span></span></li><li><span> <span class="vars">$mediator</span><span> = </span><span class="keyword">new</span><span> MusicContainerMediator(); </span></span></li><li class="alt"><span> <span class="vars">$cd</span><span> = </span><span class="keyword">new</span><span> CD(</span><span class="vars">$mediator</span><span>); </span></span></li><li><span> <span class="vars">$cd</span><span>->title = </span><span class="vars">$titleFromDB</span><span>; </span></span></li><li class="alt"><span> <span class="vars">$cd</span><span>->band = </span><span class="vars">$bandFromDB</span><span>; </span></span></li><li><span> <span class="vars">$cd</span><span>->changeBandName(</span><span class="string">"Maybe Once More"</span><span>); </span></span></li><li class="alt"><span>?> </span></li></ol>数据库脚本请参照：http://www.cxybl.com/html/wlbc/php/2011_1126_9458.html
magento(麦进斗)
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Magento是一套专业开源的PHP电子商务系统。Magento设计得非常灵活，具有模块化架构体系和丰富的功能。易于与第三方应用系统无缝集成。Magento开源网店系统的特点主要分以下几大类，网站管理促销和工具国际化支持SEO搜索引擎优化结账方式运输快递支付方式客户服务用户帐户目录管理目录浏览产品展示分析和报表Magento 1.6 主要包含以下新特性：•持久性购物 - 为不同的
