详解PHP设计模式之桥接模式

abstract class Mobile {
    abstract public function operate();
}
class HuaWei extends Mobile {
    public function operate() {
        echo '华为手机';
    }
}
class Vivo extends Mobile {
    public function operate() {
        echo 'Vivo手机';
    }
}
Abstract class Abstraction {
    protected $implementer;
    public function setImplementer ($implementer) {
        $this->implementer = $implementer;
    }
    public function run() {
        $this->implementer->operate();
    }
}
class HuaWeiApp extends Abstraction {
    public function run() {
        $this->implementer->operate();
    }
}
class VivoApp extends Abstraction {
    public function run() {
        $this->implementer->operate();
    }
}
//调用端
$ab = new HuaWeiApp();
$ab->setImplementer(new HuaWei);
$ab->run();
$ab = new VivoApp();
$ab->setImplementer(new Vivo);
$ab->run();

//创建一个实现
abstract class Implementer {
    abstract public function operate();
}
class ImplementerA extends Implementer {
    public function operate() {
        echo 'ImplementerA';
    }
}
class ImplementerB extends Implementer {
    public function operate() {
        echo 'ImplementerB';
    }
}
Abstract class Abstraction {
    protected $implementer;
    //用组合的方式替代继承
    public function setImplementer (Implementer $implementer) {
        $this->implementer = $implementer;
    }
    public function run() {
        $this->implementer->operate();
    }
}
class RefinedAbstraction extends Abstraction {
    public function run() {
        $this->implementer->operate();
    }
}
//调用端============================================================
$ab = new RefinedAbstraction();
$ab->setImplementer(new ImplementerA());
$ab->run();
$ab->setImplementer(new ImplementerB());
$ab->run();