PrivateBin\I18n::getAvailableLanguages PHP Метод

    public static function getAvailableLanguages()
    {
        if (count(self::$_availableLanguages) == 0) {
            $i18n = dir(self::_getPath());
            while (false !== ($file = $i18n->read())) {
                if (preg_match('/^([a-z]{2}).json$/', $file, $match) === 1) {
                    self::$_availableLanguages[] = $match[1];
                }
            }
            self::$_availableLanguages[] = 'en';
        }
        return self::$_availableLanguages;
    }

 /**
  * Display PrivateBin frontend.
  *
  * @access private
  * @return void
  */
 private function _view()
 {
     // set headers to disable caching
     $time = gmdate('D, d M Y H:i:s \\G\\M\\T');
     header('Cache-Control: no-store, no-cache, no-transform, must-revalidate');
     header('Pragma: no-cache');
     header('Expires: ' . $time);
     header('Last-Modified: ' . $time);
     header('Vary: Accept');
     header('Content-Security-Policy: ' . $this->_conf->getKey('cspheader'));
     header('X-Xss-Protection: 1; mode=block');
     header('X-Frame-Options: DENY');
     header('X-Content-Type-Options: nosniff');
     // label all the expiration options
     $expire = array();
     foreach ($this->_conf->getSection('expire_options') as $time => $seconds) {
         $expire[$time] = $seconds == 0 ? I18n::_(ucfirst($time)) : Filter::formatHumanReadableTime($time);
     }
     // translate all the formatter options
     $formatters = array_map('PrivateBin\\I18n::_', $this->_conf->getSection('formatter_options'));
     // set language cookie if that functionality was enabled
     $languageselection = '';
     if ($this->_conf->getKey('languageselection')) {
         $languageselection = I18n::getLanguage();
         setcookie('lang', $languageselection);
     }
     $page = new View();
     $page->assign('CIPHERDATA', $this->_data);
     $page->assign('ERROR', I18n::_($this->_error));
     $page->assign('STATUS', I18n::_($this->_status));
     $page->assign('VERSION', self::VERSION);
     $page->assign('DISCUSSION', $this->_conf->getKey('discussion'));
     $page->assign('OPENDISCUSSION', $this->_conf->getKey('opendiscussion'));
     $page->assign('MARKDOWN', array_key_exists('markdown', $formatters));
     $page->assign('SYNTAXHIGHLIGHTING', array_key_exists('syntaxhighlighting', $formatters));
     $page->assign('SYNTAXHIGHLIGHTINGTHEME', $this->_conf->getKey('syntaxhighlightingtheme'));
     $page->assign('FORMATTER', $formatters);
     $page->assign('FORMATTERDEFAULT', $this->_conf->getKey('defaultformatter'));
     $page->assign('NOTICE', I18n::_($this->_conf->getKey('notice')));
     $page->assign('BURNAFTERREADINGSELECTED', $this->_conf->getKey('burnafterreadingselected'));
     $page->assign('PASSWORD', $this->_conf->getKey('password'));
     $page->assign('FILEUPLOAD', $this->_conf->getKey('fileupload'));
     $page->assign('ZEROBINCOMPATIBILITY', $this->_conf->getKey('zerobincompatibility'));
     $page->assign('LANGUAGESELECTION', $languageselection);
     $page->assign('LANGUAGES', I18n::getLanguageLabels(I18n::getAvailableLanguages()));
     $page->assign('EXPIRE', $expire);
     $page->assign('EXPIREDEFAULT', $this->_conf->getKey('default', 'expire'));
     $page->assign('EXPIRECLONE', !$this->_doesExpire || $this->_doesExpire && $this->_conf->getKey('clone', 'expire'));
     $page->assign('URLSHORTENER', $this->_conf->getKey('urlshortener'));
     $page->draw($this->_conf->getKey('template'));
 }