PHP网站制作之PHP设计形式当中介者形式 - 仓酷云

<?php    /**    * 测试用例描写
：示例代码不但
答应
乐队进入和办理
他们的音乐合集，并且
还答应
乐队更新他们的设置装备摆设
文件，修正
乐队相干
信息和
更新其CD信息    *　　　　　　　如今
，艺术家可上传MP3纠合
并从Web站点撤下CD。因而
， Web站点需求
坚持
绝对
应的CD和MP3彼此同步。    */    //CD类    class CD {                   public $band  = '';          public $title = '';          protected $_mediator;                   public function __construct(MusicContainerMediator $mediator = NULL) {             $this->_mediator = $mediator;          }                   public function save() {             //详细
完成
待定             var_dump($this);          }                   public function changeBandName($bandname) {             if ( ! is_null($this->_mediator)) {                $this->_mediator->change($this, array("band" => $bandname));             }             $this->band = $bandname;             $this->save();          }    }             //MP3Archive类    class MP3Archive {                   protected $_mediator;                   public function __construct(MusicContainerMediator $mediator = NULL) {             $this->_mediator = $mediator;          }                   public function save() {             //详细
完成
待定             var_dump($this);          }                   public function changeBandName($bandname) {             if ( ! is_null($this->_mediator)) {                $this->_mediator->change($this, array("band" => $bandname));             }             $this->band = $bandname;             $this->save();          }    }          //中介者类    class MusicContainerMediator {                   protected $_containers = array();                   public function __construct() {             $this->_containers[] = "CD";             $this->_containers[] = "MP3Archive";          }                   public function change($originalObject, $newValue) {             $title = $originalObject->title;             $band  = $originalObject->band;                            foreach ($this->_containers as $container) {                if ( ! ($originalObject instanceof $container)) {                      $object = new $container;                      $object->title = $title;                      $object->band  = $band;                                           foreach ($newValue as $key => $val) {                         $object->$key = $val;                      }                                           $object->save();                }             }          }    }             //测试实例    $titleFromDB = "Waste of a Rib";    $bandFromDB  = "Never Again";    $mediator = new MusicContainerMediator();    $cd = new CD($mediator);    $cd->title = $titleFromDB;    $cd->band  = $bandFromDB;    $cd->changeBandName("Maybe Once More"); ?>

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