//.........这里部分代码省略.........
    $guest->email = 'root@localhost';
    $guest->description = get_string('guestuserinfo');
    $guest->mnethostid = $CFG->mnet_localhost_id;
    $guest->confirmed = 1;
    $guest->lang = $CFG->lang;
    $guest->timemodified = time();
    $guest->id = $DB->insert_record('user', $guest);
    if ($guest->id != 1) {
        echo $OUTPUT->notification('Unexpected id generated for the Guest account. Your database configuration or clustering setup may not be fully supported', 'notifyproblem');
    }
    // Store guest id
    set_config('siteguest', $guest->id);
    // Make sure user context exists
    context_user::instance($guest->id);
    // Now create admin user
    $admin = new stdClass();
    $admin->auth = 'manual';
    $admin->firstname = get_string('admin');
    $admin->lastname = get_string('user');
    $admin->username = 'admin';
    $admin->password = 'adminsetuppending';
    $admin->email = '';
    $admin->confirmed = 1;
    $admin->mnethostid = $CFG->mnet_localhost_id;
    $admin->lang = $CFG->lang;
    $admin->maildisplay = 1;
    $admin->timemodified = time();
    $admin->lastip = CLI_SCRIPT ? '0.0.0.0' : getremoteaddr();
    // installation hijacking prevention
    $admin->id = $DB->insert_record('user', $admin);
    if ($admin->id != 2) {
        echo $OUTPUT->notification('Unexpected id generated for the Admin account. Your database configuration or clustering setup may not be fully supported', 'notifyproblem');
    }
    if ($admin->id != $guest->id + 1) {
        echo $OUTPUT->notification('Nonconsecutive id generated for the Admin account. Your database configuration or clustering setup may not be fully supported.', 'notifyproblem');
    }
    // Store list of admins
    set_config('siteadmins', $admin->id);
    // Make sure user context exists
    context_user::instance($admin->id);
    // Install the roles system.
    $managerrole = create_role('', 'manager', '', 'manager');
    $coursecreatorrole = create_role('', 'coursecreator', '', 'coursecreator');
    $editteacherrole = create_role('', 'editingteacher', '', 'editingteacher');
    $noneditteacherrole = create_role('', 'teacher', '', 'teacher');
    $studentrole = create_role('', 'student', '', 'student');
    $guestrole = create_role('', 'guest', '', 'guest');
    $userrole = create_role('', 'user', '', 'user');
    $frontpagerole = create_role('', 'frontpage', '', 'frontpage');
    // Now is the correct moment to install capabilities - after creation of legacy roles, but before assigning of roles
    update_capabilities('moodle');
    // Default allow role matrices.
    foreach ($DB->get_records('role') as $role) {
        foreach (array('assign', 'override', 'switch') as $type) {
            $function = 'allow_' . $type;
            $allows = get_default_role_archetype_allows($type, $role->archetype);
            foreach ($allows as $allowid) {
                $function($role->id, $allowid);
            }
        }
    }
    // Set up the context levels where you can assign each role.
    set_role_contextlevels($managerrole, get_default_contextlevels('manager'));
    set_role_contextlevels($coursecreatorrole, get_default_contextlevels('coursecreator'));
    set_role_contextlevels($editteacherrole, get_default_contextlevels('editingteacher'));
    set_role_contextlevels($noneditteacherrole, get_default_contextlevels('teacher'));
    set_role_contextlevels($studentrole, get_default_contextlevels('student'));
    set_role_contextlevels($guestrole, get_default_contextlevels('guest'));
    set_role_contextlevels($userrole, get_default_contextlevels('user'));
    // Init theme and JS revisions
    set_config('themerev', time());
    set_config('jsrev', time());
    // No admin setting for this any more, GD is now required, remove in Moodle 2.6.
    set_config('gdversion', 2);
    // Install licenses
    require_once $CFG->libdir . '/licenselib.php';
    license_manager::install_licenses();
    // Init profile pages defaults
    if ($DB->record_exists('my_pages', array())) {
        throw new moodle_exception('generalexceptionmessage', 'error', '', 'Can not create default profile pages, records already exist.');
    }
    $mypage = new stdClass();
    $mypage->userid = NULL;
    $mypage->name = '__default';
    $mypage->private = 0;
    $mypage->sortorder = 0;
    $DB->insert_record('my_pages', $mypage);
    $mypage->private = 1;
    $DB->insert_record('my_pages', $mypage);
    // Set a sensible default sort order for the most-used question types.
    set_config('multichoice_sortorder', 1, 'question');
    set_config('truefalse_sortorder', 2, 'question');
    set_config('match_sortorder', 3, 'question');
    set_config('shortanswer_sortorder', 4, 'question');
    set_config('numerical_sortorder', 5, 'question');
    set_config('essay_sortorder', 6, 'question');
    require_once $CFG->libdir . '/db/upgradelib.php';
    make_default_scale();
    make_competence_scale();
}

/**
 * Returns a menu of all available scales from the site as well as the given course
 *
 * @global object
 * @param int $courseid The id of the course as found in the 'course' table.
 * @return array
 */
function get_scales_menu($courseid = 0)
{
    global $DB;
    $sql = "SELECT id, name\n              FROM {scale}\n             WHERE courseid = 0 or courseid = ?\n          ORDER BY courseid ASC, name ASC";
    $params = array($courseid);
    if ($scales = $DB->get_records_sql_menu($sql, $params)) {
        return $scales;
    }
    make_default_scale();
    return $DB->get_records_sql_menu($sql, $params);
}

/**
 * Returns a menu of all available scales from the site as well as the given course
 *
 * @uses $CFG
 * @param int $courseid The id of the course as found in the 'course' table.
 * @return object
 */
function get_scales_menu($courseid = 0)
{
    global $CFG;
    $sql = "SELECT id, name FROM {$CFG->prefix}scale\n             WHERE courseid = '0' or courseid = '{$courseid}'\n          ORDER BY courseid ASC, name ASC";
    if ($scales = get_records_sql_menu($sql)) {
        return $scales;
    }
    make_default_scale();
    return get_records_sql_menu($sql);
}