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php设计模式 decorator (装饰模式)

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Release: 2016-05-21 10:39:34
Original
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25种php设计模式,你全都知道吗?下面用代码介绍装饰模式(decorator模式)

<?php
/**
 * 装饰模式
 *
 * 动态的给一个对象添加一些额外的职责,就扩展功能而言比生成子类方式更为灵活
 */
header("Content-type:text/html;charset=utf-8");
abstract class MessageBoardHandler {
    public function __construct() {
    }
    abstract public function filter($msg);
}
class MessageBoard extends MessageBoardHandler {
    public function filter($msg) {
        return "处理留言板上的内容|" . $msg;
    }
}
$obj = new MessageBoard();
echo $obj->filter("一定要学好装饰模式<br/>");
// --- 以下是使用装饰模式 ----
class MessageBoardDecorator extends MessageBoardHandler {
    private $_handler = null;
    public function __construct($handler) {
        parent::__construct();
        $this->_handler = $handler;
    }
    public function filter($msg) {
        return $this->_handler->filter($msg);
    }
}
// 过滤html
class HtmlFilter extends MessageBoardDecorator {
    public function __construct($handler) {
        parent::__construct($handler);
    }
    public function filter($msg) {
        return "过滤掉HTML标签|" . parent::filter($msg);; // 过滤掉HTML标签的处理 这时只是加个文字 没有进行处理
        
    }
}
// 过滤敏感词
class SensitiveFilter extends MessageBoardDecorator {
    public function __construct($handler) {
        parent::__construct($handler);
    }
    public function filter($msg) {
        return "过滤掉敏感词|" . parent::filter($msg); // 过滤掉敏感词的处理 这时只是加个文字 没有进行处理
        
    }
}
$obj = new HtmlFilter(new SensitiveFilter(new MessageBoard()));
echo $obj->filter("一定要学好装饰模式!<br/>");
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其他相关设计模式:

http://www.phprm.com/develop/memento.html 备忘录模式(Memento模式)
http://www.phprm.com/develop/observer.html 观察者模式(Observer模式)
http://www.phprm.com/develop/template.html 模板方法模式(Template Method模式)
http://www.phprm.com/develop/command.html 命令模式(command模式)
http://www.phprm.com/develop/composite.html 组合模式(composite模式)
http://www.phprm.com/develop/flyweight.html 享元模式(flyweight模式)
http://www.phprm.com/develop/strategy.html 策略模式(strategy模式)
http://www.phprm.com/develop/state.html 状态模式(state模式)
http://www.phprm.com/develop/adapter.html 适配器模式(adapter模式)
http://www.phprm.com/develop/factory.html 工厂模式(factory模式)
http://www.phprm.com/develop/prototype.html 原型模式(prototype模式)
http://www.phprm.com/develop/facade.html 外观模式(facade模式)
http://www.phprm.com/develop/singleton.html 单例模式(singleton模式)
http://www.phprm.com/develop/bridge.html 桥梁模式(bridge模式)
http://www.phprm.com/develop/decorator.html 装饰模式(decorator模式)
http://www.phprm.com/develop/abstract.html 抽象工厂模式(abstract factory模式)
http://www.phprm.com/develop/builder.html 建造者模式(Builder模式)
http://www.phprm.com/develop/visitor.html 访问者模式(Visitor模式)
http://www.phprm.com/develop/interpreter.html 解释器模式(Interpreter模式)
http://www.phprm.com/develop/mediator.html 中介者模式(Mediator模式)
http://www.phprm.com/develop/chain.html 职责链模式(Chain Of Responsibility模式)
http://www.phprm.com/develop/proxy.html 代理模式(Proxy模式)
http://www.phprm.com/develop/interator.html 迭代器模式(Interator模式)
http://www.phprm.com/develop/dao.html 数据访问对象模式(DAO模式)
http://www.phprm.com/develop/delegation.html 委托模式(Delegation模式)


永久链接:http://www.phprm.com/develop/decorator.html

转载随意!带上文章地址吧。

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