Factory

Factory Patterns are normally use to abstract away the logic for create a product.
i.e creating a product by passing through some param defer the creation of different types object.

interface IFactory() {
    public function createProduct($productType);
}

class factory implements IFactory {
    
    public function createProduct($productType) : productParent {

        switch ($productType) {
            case 'A':
                 return new productA();
            break;
            case 'B':
                 return new productB();
            break;
            default:
                throw new Exception("product type is not defined");         
        }
    }
}

abstract class AProductParent {
    
    abstract public function doSomething();
}

class productA extends AProductParent{
     
     public function doSomething() {
        echo "do somehting a";
     }
}

class productB extends AProductParent{
      
      public function doSomething() {

        echo "do somehting b";
      }
}