# ROUTE
'test' => array(
		'type'    => 'segment',
		'options' => array(
				'route' => '/test[/:action][/:id]',
				'constraints' => array(
						'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
						'par'     => '[0-9]+',
				),
				'defaults' => array(
						'controller' => 'test/test',
						'action'     => 'index',
				),
		),
),

# CONTROLLER
<?php
namespace Something\Controller;

class TestController extends AbstractActionController
{
    public function indexAction()
    {
	echo 'index';
        echo (int) $this->params()->fromRoute('id');
    }
    public function hahaAction()
    {
	echo 'haha';
        echo (int) $this->params()->fromRoute('id');
    }
}

# URLS
/test prints index0
/test/haha prints haha0
/test/haha/33 prints haha33
/test/33 prints my layout + error page with "The requested controller was unable to dispatch the request."