Zend 2: How to throw a 404 error from controller

Question

I want to throw a '404 Page not found' error from my controller. How can I do that?

I use Zend Framework 2 not 1.

Answer 1

class IndexController extends AbstractActionController
{
    public function previewAction ()
    {
        return $this->notFoundAction ();
    }
}

Answer 2

Just try with:

$this->getResponse()->setStatusCode(404);
return; 

in your controller's action method.