WB 2.11.0

<?php

// -----

    $getLanguage = function($sFile) {

        $aRetval = null;

        $language_code = $language_name = '';

        include $sFile;

        if ($language_code && $language_name) {

            $aRetval = ['code' => $language_code, 'name' => $language_name];

        }

        return $aRetval;

    };

// -----

    if (!defined('WB_PATH')){define('WB_PATH', (dirname(__DIR__)));}

    $aMatches = [];

    $sOutput = PHP_EOL;

    $sDefaultLang = isset($_SESSION['default_language']) ? $_SESSION['default_language'] : 'EN';

    $sLangDir = str_replace('\\', '/', dirname(__DIR__).'/languages/');

    $sOldWorkingDir = getcwd();

    chdir($sLangDir);

    foreach(glob('??.php') as $sFilename) {

        if (preg_match('/[A-Z]{2}\.php$/s', $sFilename) && is_readable($sLangDir.$sFilename)) {

            if (!($aMatch = $getLanguage($sLangDir.$sFilename))) { continue; }

            $aMatch['status'] = ($aMatch['code'] == $sDefaultLang);

            $sOutput .= '<option value="'.$aMatch['code'].'" '

                      . ($aMatch['status'] ? 'selected="selected"' : '').'>'

                      . $aMatch['name'].'</option>'.PHP_EOL;

        }

    }

    chdir($sOldWorkingDir);

    $sOutput .= '</select>'.PHP_EOL;

    // output Language options

    echo $sOutput;

    if (sizeof($aMatches) > 0) {

        $sOutput = PHP_EOL;

        foreach ($aMatches as $aMatch) {

            $sOutput .= '<option value="'.$aMatch['code'].'" '

                      . ($aMatch['status'] ? 'selected="selected"' : '').'>'

                      . $aMatch['name'].'</option>'.PHP_EOL;

        }

        $sOutput .= '</select>'.PHP_EOL;

        // output Language options

        echo $sOutput;

        unset($sOutput);

    }

    unset($sOutput, $aMatch, $getLanguage);