Introduction

You can change the application's locale depending on a GET parameter used on a request. All you need to do is to register our middleware, into your routes or HTTP kernel. Here is an example of how to register the middleware for web routes:

Register Middleware

Register the middleware within the App\Providers\RouteServiceProvider service provider class:

/**
 * The application's route middleware groups.
 *
 * @var array
 */
protected $middlewareGroups = [
    'web' => [
        \App\Http\Middleware\EncryptCookies::class,
        \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
        \Illuminate\Session\Middleware\StartSession::class,
        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
        \App\Http\Middleware\VerifyCsrfToken::class,
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
        \Sirthxalot\Laravel\I18n\Http\Middleware\SetLocaleFromGetParameter::class
    ],
];

Basic Usage

Now every client will be able to change the locale if it uses the correct GET parameter:

http://localhost?locale=de_CH

The middleware detects the locale from the locale GET parameter. If the given locale exists in languages, then the application's will be changed to it:

app()->getLocale(); // de_CH