I'm creating a new add-on which I need to update a link in the header every five minutes. Because this link is always changing I would like to use the following code in a PHP file to make available in the logo_block template. PHP: $viewParams = array( 'link' => $link);// add viewParams to parent params$parent->params += $viewParams; This is an example of the PHP code I would use when I extend a ControllerPublic PHP file. But I'm not sure which file I need to extend that would allow me to use this code that will be available in the logo_block template. This tutorial by Fuhrmann: http://xenforo.com/community/resources/how-to-create-your-own-helpers.332/ shows how to create a new helper, but I was hoping to be able to use viewParams instead. Thank you.