Jarves\Translation\Translator::isValidLanguage PHP 메소드

    public function isValidLanguage($lang)
    {
        if (!$this->jarves->getSystemConfig()->getLanguages() && $lang == 'en') {
            return true;
        }
        //default
        if ($this->jarves->getSystemConfig()->getLanguages()) {
            $languages = explode(',', preg_replace('/[^a-zA-Z0-9]/', '', $this->jarves->getSystemConfig()->getLanguages()));
            return array_search($lang, $languages) !== true;
        } else {
            return $lang == 'en';
        }
    }

 /**
  * @ApiDoc(
  *  section="Interface i18n",
  *  description="Prints all language messages"
  * )
  *
  * @Rest\QueryParam(name="lang", requirements="[a-z]{2,3}", strict=true, description="The language code")
  * @Rest\QueryParam(name="javascript", requirements=".+", default=false, description="If it should be printed as javascript")
  *
  * @Rest\Get("/admin/ui/language")
  *
  * @param ParamFetcher $paramFetcher
  *
  * @return array|string depends on javascript param
  */
 public function getLanguageAction(ParamFetcher $paramFetcher)
 {
     $lang = $paramFetcher->get('lang');
     $javascript = $paramFetcher->get('javascript');
     if (!$this->translator->isValidLanguage($lang)) {
         $lang = 'en';
     }
     $this->pageStack->getSession()->set('admin_language', $lang);
     $messages = $this->translator->loadMessages($lang);
     if ($javascript) {
         $response = new Response();
         $response->headers->set('Content-Type', 'text/javascript');
         $content = "if( typeof(jarves)=='undefined') window.jarves = {}; jarves.lang = " . json_encode($messages, JSON_PRETTY_PRINT);
         $content .= "\nLocale.define('en-US', 'Date', " . $this->templating->render('JarvesBundle:Default:javascript-locales.js.twig') . ");";
         $response->setContent($content);
         return $response;
     } else {
         $messages['mootools'] = $this->templating->render('JarvesBundle:Default:javascript-locales.js.twig');
         return $messages;
     }
 }