工廠模式

interface Message {
    public function send(string $msg);
}

class AliYunMessage implements Message {
    public function send(string $msg) {
        return '阿里雲簡訊（原阿里大魚）傳送成功！簡訊內容：' . $msg;
    }
}

class BaiduYunMessage implements Message {
    public function send(string $msg) {
        return '百度SMS簡訊傳送成功！簡訊內容：' . $msg;
    }
}


abstract class MessageFactory {
    abstract protected function factoryMethod();
    public function getMessage() {
        return $this->factoryMethod();
    }
}

class AliYunFactory extends MessageFactory {
    protected function factoryMethod(){
        return new AliYunMessage();
    }
}

class BaiduYunFactory extends MessageFactory {
    protected function factoryMethod(){
        return new BaiduYunMessage();
    }
}

// 使用百度
$factory = new BaiduYunFactory();
$message = $factory->getMessage();
echo $message->send('您有新的短訊息，請查收');