CakePHP: best way to call an action of another controller with array as parameter?

Question

In a controller, what is the most appropriate way to call the action of another controller and also pass an array as parameter?

I know that you can use requestAction

Answer 1

CakePHP 2.X:

constructClasses();

        //Call a method of Posts passing a parameter
        $Posts->aMethod($parameter);
    }
}