How do I get the parameters from the url

[simbolo]

Anyone know what I would need to set so I could do something like this:

example.com/help/advertising/additional-page/
or
example.com/help/additional-page/advertising
To do along with something like this:

public function actionAdditionalPage()
    {
        // Get the page from the url
        $current_url_param = $this->_input->filterSingle('help_page_name', XenForo_Input::STRING); // Outputs: advertising
        // Template name
        $current_url_param_template = 'help_' . $current_url_param; // Outputs: help_advertising
        // Class name
        $current_url_param_class = 'XenForo_ViewPublic_Help_' .ucfirst($current_url_param); // Outputs: XenForo_ViewPublic_Help_Advertising

        // return template that should be displayed
        return $this->_getWrapper($current_url_param,
                    $this->responseView( $current_url_param_class, $current_url_param_template)); // Returns help_advertising template view

    }

This would take the advertising part of the url and output the correct template and class info.

Instead of coding every page action this would allow me to specify it else where and remove the dependency on creating a new action each time. I *should* be able to do it, just not sure on the syntax within xF.