function forum_check_maintenance()
{
    $forum_maintenance_functions_array = array('pm_system_prune_folders', 'thread_auto_prune_unread_data', 'sitemap_create_file');
    $new_forum_settings = array();
    if (!forum_self_clean_check_ajax()) {
        return;
    }
    $forum_maintenance_hour = forum_get_setting('forum_maintenance_hour', 'is_numeric', 3);
    $forum_maintenance_duration = forum_get_setting('forum_maintenance_duration', 'is_numeric', 1);
    $forum_maintenance_function = forum_get_setting('forum_maintenance_function', 'is_numeric', 0);
    $forum_maintenance_function++;
    if (!isset($forum_maintenance_functions_array[$forum_maintenance_function])) {
        $forum_maintenance_function = 0;
    }
    $forum_maintenance_date_var = sprintf("%s_last_run", $forum_maintenance_functions_array[$forum_maintenance_function]);
    $forum_maintenance_last_run = forum_get_setting($forum_maintenance_date_var, 'is_numeric', 0);
    if (time() - $forum_maintenance_last_run < DAY_IN_SECONDS) {
        return;
    }
    if (time() < mktime($forum_maintenance_hour)) {
        return;
    }
    if (time() > mktime($forum_maintenance_hour + $forum_maintenance_duration)) {
        return;
    }
    if (!function_exists($forum_maintenance_functions_array[$forum_maintenance_function])) {
        return;
    }
    ignore_user_abort(true);
    $forum_maintenance_functions_array[$forum_maintenance_function]();
    $new_forum_settings[$forum_maintenance_date_var] = time();
    $new_forum_settings['forum_maintenance_function'] = $forum_maintenance_function;
    forum_save_global_settings($new_forum_settings);
}
                echo "    </tr>\n";
                echo "    <tr>\n";
                echo "      <td align=\"left\">&nbsp;</td>\n";
                echo "    </tr>\n";
                echo "    <tr>\n";
                echo "      <td align=\"center\">", form_submit("confirm_unread_cutoff", gettext("Yes")), "&nbsp;", form_submit("cancel_unread_cutoff", gettext("No")), "</td>\n";
                echo "    </tr>\n";
                echo "  </table>\n";
                echo "</form>\n";
                echo "</div>\n";
                html_display_warning_msg(gettext("Clicking 'No' will only cancel the unread cut-off changes. Other changes you've made will still be saved."), '600', 'center');
                html_draw_bottom();
                exit;
            }
        }
        if (forum_save_global_settings($new_forum_settings)) {
            if (isset($_POST['confirm_unread_cutoff'])) {
                forum_update_unread_data($unread_cutoff_stamp);
            }
            header_redirect("admin_default_forum_settings.php?webtag={$webtag}&updated=true", gettext("Forum settings successfully updated"));
        } else {
            $valid = false;
            $error_msg_array[] = gettext("Failed to update forum settings. Please try again later.");
        }
    }
    $forum_global_settings = array_merge($forum_global_settings, $new_forum_settings);
}
// Start Output Here
html_draw_top(sprintf('title=%s', gettext("Admin - Global Forum Settings")), 'class=window_title', "admin.js", "emoticons.js");
echo "<h1>", gettext("Admin"), "<img src=\"", html_style_image('separator.png'), "\" alt=\"\" border=\"0\" />", gettext("Global Forum Settings"), "</h1>\n";
if (isset($error_msg_array) && sizeof($error_msg_array) > 0) {