Question

I was wondering if it is possible to use interface parameters in PHP functions / methods.

I’m used to coding in .Net and using .Net this is possible, such as having the following interface:

interface IVehicleDataProvider
{
    public void Create(IVehicle Vehicle);
}

Then I could implement this in a class as such:

class CarDataProvider : IVehicleDataProvider
{
    public void Create(Car Car)
    {
        //do something
    }
}

or

class TruckDataProvider : IVehicleDataProvider
{
    public void Create(Truck Truck)
    {
        //do something
    }
}

as long as Car or Truck implements an IVehicle interface.

Can the same thing be done in PHP?

Answer 1

No, you can’t define one type in the interface, and a different one (even though it’s a subclass) in the implementor, the implementor must follow the interface completely.

But even if you define

function create(IVehicle $vehicle);

You can still pass in Cars and Trucks.