如何以适当的方式扩展一些php类，以便从子类访问其他子类的所有公共方法 - How can extend in proper way some php classes for have access from child class to all public methods from other child class?

How can extend in proper way some php classes for have access from child class to all public methods from other child class?

上面的类有什么问题？基本上，我想从奥迪，福特，欧宝类访问所有或两个3类（公共方法）。例如，在奥迪的一个对象方法中，可以访问欧宝的公共方法，如：

[在奥迪]函数otherPrices（）｛return$this->opel->getPrice（）；｝

class Car {
    function Car() {}
}
class Model extends Car {
    public $audi;
    public $ford;
    public $opel;
    function Model() {
        parent::Car();
        $this->audi = new Audi();
        $this->ford = new Ford();
        $this->opel = new Opel();
    }
}
class Factory {
    public $audi;
    public $ford;
    public $opel;
    function Factory(){
        $model = new Model();
        $this->audi = $model->audi;
        $this->ford = $model->ford;
        $this->opel = $model->opel;
    }
}
class Audi extends Factory {
    public $price = 10;
    function Audi() {}
    function audiVsOpel(){
        return "A:" . ($this->price - $this->opel->price);
    }
}
class Ford extends Factory {
    public $price = 12;
    function Ford() {}
    function fordVsAudi(){
        return "B:" . ($this->price - $this->audi->price);
    }
}
class Opel extends Factory {
    public $price = 14;
    function Opel() {}
    function opelVsford(){
        return "C:" . ($this->price - $this->ford->price);
    }
}
/*
Here a implementation
*/
$factory = new Factory();
echo $factory->audi->audiVsOpel(); // want to echo -4
echo $factory->ford->fordVsAudi(); // want to echo 2
echo $factory->opel->opelVsford(); // want to echo 2

您可以在类Factory中使用getter：

public function getFactory($factory) {
    if (NULL === $this->{$factory}) {
        $this->{$factory} = new $factory;
    }
    return $this->{$factory};
}

然后在每个工厂类中获得不同的工厂对象，方法如下：

$this->getFactory('opel')->price

代码中的工作示例：

class Car {
    function Car() {}
}
class Model extends Car {
    public $audi;
    public $ford;
    public $opel;
    function Model() {
        parent::Car();
        $this->audi = new Audi();
        $this->ford = new Ford();
        $this->opel = new Opel();
    }
}
class Factory {
    public $audi = NULL;
    public $ford = NULL;
    public $opel = NULL;
    function Factory(){
        $model = new Model();
        $this->audi = $model->audi;
        $this->ford = $model->ford;
        $this->opel = $model->opel;
    }
    public function getFactory($factory) {
        if (NULL === $this->{$factory}) {
            $this->{$factory} = new $factory;
        }
        return $this->{$factory};
    }
}
class Audi extends Factory {
    public $price = 10;
    function Audi() {}
    function audiVsOpel(){
        return "A:" . ($this->price - $this->getFactory('opel')->price);
    }
}
class Ford extends Factory {
    public $price = 12;
    function Ford() {}
    function fordVsAudi(){
        return "B:" . ($this->price - $this->getFactory('audi')->price);
    }
}
class Opel extends Factory {
    public $price = 14;
    function Opel() {}
    function opelVsford(){
        return "C:" . ($this->price - $this->getFactory('ford')->price);
    }
}
/*
Here a implementation
*/
$factory = new Factory();
var_dump($factory);
echo $factory->audi->audiVsOpel(); // echo -4
echo $factory->ford->fordVsAudi(); // echo 2
echo $factory->opel->opelVsford(); // echo 2