echo '</div>';
api_display_tool_title($tool_name);
if ($_POST['form_sent']) {
    $form_sent = $_POST['form_sent'];
    $users = is_array($_POST['user_list']) ? $_POST['user_list'] : array();
    $url_list = is_array($_POST['url_list']) ? $_POST['url_list'] : array();
    $first_letter_user = $_POST['first_letter_user'];
    foreach ($users as $key => $value) {
        $users[$key] = intval($value);
    }
    if ($form_sent == 1) {
        if (count($users) == 0 || count($url_list) == 0) {
            Display::display_error_message(get_lang('AtLeastOneUserAndOneURL'));
            //header('Location: access_urls.php?action=show_message&message='.get_lang('AtLeastOneUserAndOneURL'));
        } else {
            UrlManager::add_users_to_urls($users, $url_list);
            Display::display_confirmation_message(get_lang('UsersBelongURL'));
            //header('Location: access_urls.php?action=show_message&message='.get_lang('UsersBelongURL'));
        }
    }
}
/*	Display GUI	*/
if (empty($first_letter_user)) {
    $sql = "SELECT count(*) as nb_users FROM {$tbl_user}";
    $result = Database::query($sql);
    $num_row = Database::fetch_array($result);
    if ($num_row['nb_users'] > 1000) {
        //if there are too much users to gracefully handle with the HTML select list,
        // assign a default filter on users names
        $first_letter_user = '******';
    }