Method App::setLocale() in Laravel 5.2

Question

After organizing my code, I tested to see if it worked for real-time language changes with the method App::setLocale() doesn’t work, but when I change the file app.php the locale it works perfectly, this translating my site in the language I change manually.

Could someone explain to me why I can’t change from the code?

Controller

class LangController extends Controller
{
    public function switchLang($lang)
    {
        if(array_key_exists($lang, Config::get('languages')))
        {
            Session::set('app.locale', $lang);
        }
        return Redirect::back(); 
    }
}

Filing cabinet Widdleware Language.php

class Language
{
    public function handle($request, Closure $next)
    {
        if (Session::has('app.locale')array_key_exists(Session::get('app.locale'), Config::get('languages'))) {
            App::setLocale(Session::get('app.locale'));
        }
        else 
        { // This is optional as Laravel will automatically set the fallback language if there is none specified
            App::setLocale(Config::get('app.fallback_locale'));
        }
        return $next($request);
    }
}

Route

Route::get('lang/{lang}', ['as'=>'lang.switch', 'uses'=>'LangController@switchLang']);

Kernel file updated with my Middleware

\Birth\Http\Middleware\Language::class,

Arquivo languages.php que retorna os idiomas

return [
    'en' => 'EN',
    'fr' => 'FR',
    'ru' => 'РУ',
    'pt' => 'PT',
    'es' => 'ES',
];

View

<a href="#" class="dropdown-toggle active" data-toggle="dropdown">
         {{ Config::get('languages')[App::getLocale()] }}

</a>
@foreach (Config::get('languages') as $lang => $language)
  @if ($lang != App::getLocale())

  | <a class="link-a" href="{{ route('lang.switch', $lang) }}">{{$language}}</a> 

  @endif
@endforeach

Answer 1

Here is the solution of the problem mentioned above. After a few days of temptation, fortunately I managed to get around the situation as follows: 1. I created a variable in the view that would receive a value returned from the controller. 2. I test whether the same variable has received the value or not. 3. If the variable receives a value, I call in the view the method App::setLocale($variavel) and step the variable as parameter of the method, which in this case contains the key of one of the languages and the page is translated to the selected language.

Here is the code, it may even be that there is a better way to do it, but the important thing is that it works right as I wanted.

  class ControllerL extends BaseController
  {
        use AuthorizesRequests, DispatchesJobs, ValidatesRequests;
        public function choose($lang)
        {
           return view('welcome',['Lang'=>$lang]);
        }
   }

routa

  Route::get('/{lang}','ControllerL@choose');

Variable that receives the value in the view

  {{isset($Lang) ? App::setLocale($Lang) : false}}

In short, I think the setLocale() method works in real time this and more for the client-side. At least that’s what you might notice.

Answer 2

I don’t know if this is the problem, but this if is wrong:

if (Session::has('app.locale')array_key_exists(Session::get('app.locale'), Config::get('languages'))) {

The broker would be this:

if (Session::has('app.locale') && array_key_exists(Session::get('app.locale'), Config::get('languages'))) {
    App::setLocale(Session::get('app.locale'));
}
else 
{ // This is optional as Laravel will automatically set the fallback language if there is none specified
    App::setLocale(Config::get('app.fallback_locale'));
}

Use a few more local variables to store what you’ve already done and make it easier to understand what you’ve done yourself, try this way:

$locale = Session::has('app.locale') ? Session::get('app.locale') : false;

if ($locale && array_key_exists($locale, Config::get('languages'))) {
    App::setLocale($locale);
} else {
    App::setLocale(Config::get('app.fallback_locale'));
}