// Print certificates (without the common header/footer/watermark
            //  stuff) and return as one multiple-pages PDF
            $address = api_get_setting('platform.institution_address');
            $phone = api_get_setting('admin.administrator_phone');
            $address = str_replace('\\n', '<br />', $address);
            $pdf->custom_header = array('html' => "<h5 align='right'>{$address} <br />{$phone}</h5>");
            //  stuff) and return as one multiple-pages PDF
            $pdf->html_to_pdf($pdfList, null, null, false, true, true);
        }
        // Delete calc_score session data
        Session::erase('calc_score');
        break;
    case 'download':
        $userId = isset($_GET['user_id']) && $_GET['user_id'] ? $_GET['user_id'] : null;
        $cats = Category::load($cat_id, null, null, null, null, null, false);
        GradebookUtils::generateTable($userId, $cats);
        break;
}
$course_code = api_get_course_id();
$interbreadcrumb[] = array('url' => Security::remove_XSS($_SESSION['gradebook_dest']) . '?', 'name' => get_lang('Gradebook'));
$interbreadcrumb[] = array('url' => '#', 'name' => get_lang('GradebookListOfStudentsReports'));
$this_section = SECTION_COURSES;
Display::display_header('');
$token = Security::get_token();
echo Display::page_header(get_lang('GradebookListOfStudentsReports'));
echo '<div class="btn-group">';
if (count($userList) > 0) {
    $url = api_get_self() . '?action=export_all&' . api_get_cidReq() . '&selectcat=' . $cat_id;
    echo Display::url(get_lang('ExportAllToPDF'), $url, array('class' => 'btn btn-default'));
}
echo '</div>';