Laravel persistent language prefixing

filters.php

<?php

App::before(function($request))
{
  if ( in_array(Request::segment(1), Config::get('app.languages')) ) {
    Session::put('locale', Request::segment(1));
  } else {
    return Redirect::to(Config::get('app.locale'));
  }
  if ( Session::has('locale') ) {
    App::setLocale(Session::get('locale'));
  }
});

routes.php

<?php

Route::group(array('prefix' => '{locale}')

  Route::get('home', function ( )
  {
    return View::make('home');
  });

)->where(array('locale' => '[a-z]{2}'));

Hi,

any idea of why I am getting the error in filter.php:

in_array() expects parameter 2 to be array, null given

  if ( in_array(Request::segment(1), Config::get('app.languages')) ) {

I am trying to access the site like this localhost/es/finder but even /localhost/finder I get the error.

Thanks

@kuroski thank you.
@notforever to answer your old question, add something like this to app/config.php:
'languages' => Array('en', 'es', 'it', 'de', 'jp')