PHP abstract method with unknown number of arguments

Question

I have:

• abstract class Car with an abstract method called drive().

I have two classes which extend Car :

1. Manual_Car
2. Automatic_car

My problem is the method drive() has different number of arguments in this two cases.

This is the code :

abstract class Car{
    abstract public function drive( //variable number of args );
}

class Manual_Car extends Car{
   public function drive( $speed, $gearbox){
      ...
   }
}

class Automatic_Car extends Car{
   public function drive( $speed ){
      ...
   }
}

How can I declare my abstract class with an unknown number of arguments?

Answer 1

I found the solution ! Thanks to @Alex Howansky.

Try to declare abstract class with unknown number of arguments is not the best practice because it makes a case of signature violation.

Best Practice

All extra argument like $gearbox should be a class parameter.

Solution code in my example :

abstract class Car{

    protected $arg1, $arg2;

    public function __construct( $arg1, $arg2 ){
         $this->arg1 = $arg1;
         $this->arg2 = $arg2;
    }
    abstract public function drive( $speed );
}

class Manual_Car extends Car{

   protected $gearbox;

   public function __construct( $arg1, $arg2, $gearbox ){
         parent::__construct( $arg1, $arg2 );
         $this->gearbox = $gearbox;
    }

   public function drive( $speed ){
      ...
      //use $this->gearbox here 
   }
}

class Automatic_Car extends Car{
   public function drive( $speed ){
      ...
   }
}