getSupportedLanguagesKeys() public static method

Returns supported languages language key
public static getSupportedLanguagesKeys ( ) : array
return array keys of supported languages
 /**
  * @param Request $request
  * @param $locale
  * @return \Illuminate\Http\RedirectResponse|\Illuminate\Routing\Redirector
  */
 public function getSwitchLocale(Request $request, $locale)
 {
     // check if supported
     $supportedLanguagesKeys = \LaravelLocalization::getSupportedLanguagesKeys();
     if (!in_array($locale, $supportedLanguagesKeys)) {
         abort(404);
     }
     // store in session
     session(['someline-locale' => $locale]);
     // check if has redirect url
     $redirect_url = '/';
     if ($request->has('redirect_url')) {
         $redirect_url = $request->get('redirect_url');
     }
     return redirect($redirect_url);
 }