$PAGE->navbar->add($strplugincheck);
                $PAGE->set_title($strplugincheck);
                $PAGE->set_heading($strplugincheck);
                $PAGE->set_cacheable(false);
                $reloadurl = new moodle_url('/admin/index.php', array('confirmupgrade' => 1, 'confirmrelease' => 1));
                if ($fetchupdates) {
                    // no sesskey support guaranteed here
                    available_update_checker::instance()->fetch();
                    redirect($reloadurl);
                }
                $output = $PAGE->get_renderer('core', 'admin');
                echo $output->upgrade_plugin_check_page(plugin_manager::instance(), available_update_checker::instance(), $version, $showallplugins, $reloadurl, new moodle_url('/admin/index.php', array('confirmupgrade' => 1, 'confirmrelease' => 1, 'confirmplugincheck' => 1)));
                die;
            } else {
                // Launch main upgrade
                upgrade_core($version, true);
            }
        }
    }
} else {
    if ($version < $CFG->version) {
        // better stop here, we can not continue with plugin upgrades or anything else
        throw new moodle_exception('downgradedcore', 'error', new moodle_url('/admin/'));
    }
}
// Updated human-readable release version if necessary
if ($release != $CFG->release) {
    // Update the release version
    set_config('release', $release);
}
if (moodle_needs_upgrading()) {

function mnetadmin_rpc_upgrade($user, $json_response = true)
{
    global $CFG, $USER;
    // Invoke local user and check his rights
    if ($auth_response = invoke_local_user((array) $user)) {
        if ($json_response) {
            return $auth_response;
        } else {
            return json_decode($auth_response);
        }
    }
    // Creating response
    $response = new stdclass();
    $response->status = RPC_SUCCESS;
    require "{$CFG->dirroot}/version.php";
    // defines $version, $release, $branch and $maturity
    $CFG->target_release = $release;
    // used during installation and upgrades
    if ($version < $CFG->version) {
        $response->status = RPC_FAILURE_RUN;
        $response->error = get_string('downgradedcore', 'error');
        $response->errors[] = get_string('downgradedcore', 'error');
        if ($json_response) {
            return json_encode($response);
        } else {
            return $response;
        }
    }
    $oldversion = "{$CFG->release} ({$CFG->version})";
    $newversion = "{$release} ({$version})";
    if (!moodle_needs_upgrading()) {
        $response->message = get_string('cliupgradenoneed', 'core_admin', $newversion);
        if ($json_response) {
            return json_encode($response);
        } else {
            return $response;
        }
    }
    // debug_trace('Remote Upgrade : Environment check');
    list($envstatus, $environment_results) = check_moodle_environment(normalize_version($release), ENV_SELECT_NEWER);
    if (!$envstatus) {
        $response->status = RPC_FAILURE_RUN;
        $response->error = vmoodle_get_string('environmentissues', 'vmoodleadminset_upgrade');
        $response->errors[] = vmoodle_get_string('environmentissues', 'vmoodleadminset_upgrade');
        $response->detail = $environment_results;
        if ($json_response) {
            return json_encode($response);
        } else {
            return $response;
        }
    }
    // Test plugin dependencies.
    // debug_trace('Remote Upgrade : Plugins check');
    $failed = array();
    if (!plugin_manager::instance()->all_plugins_ok($version, $failed)) {
        $response->status = RPC_FAILURE_RUN;
        $response->error = get_string('pluginschecktodo', 'admin');
        $response->errors[] = get_string('pluginschecktodo', 'admin');
        if ($json_response) {
            return json_encode($response);
        } else {
            return $response;
        }
    }
    ob_start();
    // debug_trace('Remote Upgrade : Upgrade core');
    if ($version > $CFG->version) {
        upgrade_core($version, false);
    }
    set_config('release', $release);
    set_config('branch', $branch);
    // unconditionally upgrade
    // debug_trace('Remote Upgrade : Upgrade other');
    upgrade_noncore(false);
    // log in as admin - we need doanything permission when applying defaults
    // debug_trace('Remote Upgrade : Turning ADMIN ');
    session_set_user(get_admin());
    // apply all default settings, just in case do it twice to fill all defaults
    // debug_trace('Remote Upgrade : Applying settings ');
    admin_apply_default_settings(NULL, false);
    admin_apply_default_settings(NULL, false);
    ob_end_clean();
    $response->message = vmoodle_get_string('upgradecomplete', 'vmoodleadminset_upgrade', $newversion);
    if ($json_response) {
        return json_encode($response);
    } else {
        return $response;
    }
}