RCCWP_CustomWritePanelPage::GetAssignedCategoriesString PHP Method

    function GetAssignedCategoriesString($customWritePanel)
    {
        $results = RCCWP_CustomWritePanel::GetAssignedCategories($customWritePanel);
        $str = '';
        foreach ($results as $r) {
            $str .= $r->cat_name . ', ';
        }
        $str = substr($str, 0, strlen($str) - 2);
        // deletes last comma and whitespace
        return $str;
    }