luos/workflow/engine/methods/setup/loginSettingsAjax.php

<?php

use ProcessMaker\Exception\RBACException;

// Include global object RBAC
global $RBAC;

// Check if the current user have the correct permissions to access to this resource, if not throws a RBAC Exception with code 403
if ($RBAC->userCanAccess('PM_SETUP') !== 1 || $RBAC->userCanAccess('PM_SETUP_LOGIN') !== 1) {
    throw new RBACException('ID_ACCESS_DENIED', 403);
}

$request = isset($_REQUEST['request']) ? $_REQUEST['request'] : null;

switch ($request) {
    case 'getLangList':

        $Translations = new Translation();
        $result = new stdClass();
        $result->rows = array();

        $langs = $Translations->getTranslationEnvironments();
        foreach ($langs as $lang) {
            $result->rows[] = array(
                'LAN_ID' => $lang['LOCALE'],
                'LAN_NAME' => $lang['LANGUAGE']
            );
        }

        $result->rows[] = array("LAN_ID" => "", "LAN_NAME" => G::LoadTranslation("ID_USE_LANGUAGE_URL"));

        print(G::json_encode($result));
        break;
    case 'saveSettings':
        $memcache = PMmemcached::getSingleton(!empty(config("system.workspace")) ? config("system.workspace") : '');

        $conf = new Configurations();
        $conf->loadConfig($obj, 'ENVIRONMENT_SETTINGS', '');

        $conf->aConfig['login_enableForgotPassword'] = isset($_REQUEST['forgotPasswd']);
        $conf->aConfig['login_enableVirtualKeyboard'] = isset($_REQUEST['virtualKeyboad']);
        $conf->aConfig['login_defaultLanguage'] = isset($_REQUEST['lang']) ? $_REQUEST['lang'] : 'en';

        $conf->saveConfig('ENVIRONMENT_SETTINGS', '');

        $lang = isset($_REQUEST['lang']) ? $_REQUEST['lang'] : 'en';
        //remove from memcache when this value is updated/created
        $memcache->delete('flagForgotPassword');

        $response = new stdclass();
        $response->success = true;

        $messEnableForgotPassword = (isset($conf->aConfig["login_enableForgotPassword"]) && $conf->aConfig["login_enableForgotPassword"] == "1") ? G::LoadTranslation("ID_YES") : G::LoadTranslation("ID_NO");
        G::auditLog("UpdateLoginSettings",
            "DefaultLanguage-> " . $lang . " EnableForgotPassword-> " . $messEnableForgotPassword);

        echo G::json_encode($response);

        break;
}