BP_Reply_By_Email_Extension::extend_querystring PHP Method

    public function extend_querystring($querystring, $listener)
    {
        // check to see if the listener component matches our extension's unique ID
        // if it does, proceed with setting up our custom querystring
        if ($listener->component == $this->id) {
            $querystring = "{$this->item_id_param}={$listener->item_id}";
            // some querystrings only use one parameter; if a second one exists,
            // add it.
            if (!empty($this->secondary_item_id_param)) {
                $querystring .= "&{$this->secondary_item_id_param}={$listener->secondary_item_id}";
            }
        }
        return $querystring;
    }