Default controller key - laravel

Question

I have a laravel route like below :
Route::group(['namespace' => 'Aggregate\Customer\Controller\v1_0','middleware' => 'jwt.auth', 'prefix' => 'api/v1.0/{lang}'], function () {
Route::put('customer/{id}', 'CustomerController#update_customer');
});
And i want to lang key on route 'prefix' => 'api/v1.0/{lang}' be first variable globally in all methods and in all controllers without manual added in all methods like :
See $lang
public function add_address_book($lang,$user_id,AddressBookRequest $request)
{
How can i do that?

Answer 1

One option is update the config var app.locale.
Route::group([
'namespace' => 'Aggregate\Customer\Controller\v1_0',
'middleware' => 'jwt.auth',
'prefix' => 'api/v1.0/{lang}'
], function () {
App::setLocale(app('request')->segment(3));
Route::put('customer/{id}', 'CustomerController#update_customer');
});
Then use
echo App::getLocale();
You can set the default locale and the fallback locale in app/config.php
Another option is to set up a singleton in the app container
Route::group([
'namespace' => 'Aggregate\Customer\Controller\v1_0',
'middleware' => 'jwt.auth',
'prefix' => 'api/v1.0/{lang}'
], function () {
app()->singleton('lang', function () {
return app('request')->segment(3);
});
Route::put('customer/{id}', 'CustomerController#update_customer');
});
Then in your controllers (or anywhere) you can use
echo app('lang');