How should this function be achieved using MVC

[eluser]thurting[/eluser]
I'm not really sure what you are trying to accomplish, but your description sounds like it could be solved by creating a super class from which the relevant controllers inherit from. Just remember to call the parent constructor throughout the chain so Controller::Controller() is eventually called.

Code:

//This is the superclass all controllers must inherit from - core class
class Controller {}

//This should probably be an abstract class
abstract class EmailController extends Controller {
  public function __construct() {
    parent::Controller();
  }

  private function _mail() {
     //your function here
  }
}

//This is your action controller
class ActionController extends EmailController {
  public function __construct() {
    parent::__construct();
  }

  public function action() {
    //This is an action - I can call the _mail function from here
    $this->_mail();
  }
}