php设计模式 facade (外观模式)

25种php设计模式，你全都知道吗？下面用代码介绍外观模式(facade模式)

";
    }
}
class SubSytem2 {
    public function Method2() {
        echo "subsystem2 method2
";
    }
}
class SubSytem3 {
    public function Method3() {
        echo "subsystem3 method3
";
    }
}
class Facade {
    private $_object1 = null;
    private $_object2 = null;
    private $_object3 = null;
    public function __construct() {
        $this->_object1 = new SubSytem1();
        $this->_object2 = new SubSytem2();
        $this->_object3 = new SubSytem3();
    }
    public function MethodA() {
        echo "Facade MethodA
";
        $this->_object1->Method1();
        $this->_object2->Method2();
    }
    public function MethodB() {
        echo "Facade MethodB
";
        $this->_object2->Method2();
        $this->_object3->Method3();
    }
}
// 实例化
$objFacade = new Facade();
$objFacade->MethodA();
$objFacade->MethodB();

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)