how to access query string in controller and routes of laravel

Question

when I will click on a tag it go to specific url if no id found then go to reference My view

<a href="{{URL::to('user/')}}/?reference={{$user->username}}">
                    go there
                  </a>

my route

Route::get('/user/{id}/{reference?}', 'UserController@index')->name('/user');

question from:https://stackoverflow.com/questions/65679917/how-to-access-query-string-in-controller-and-routes-of-laravel

Answer 1

The query string is considered part of the inputs and not part of the URI for routing. If you want the 'id' part of the URI to be optional you would have to adjust your definition. Then in your controller you can access your reference query string parameter.

Route::get('user/{id?}', 'UserController@index')->name('user');

public function index(Request $request, $id = null)
{
    $reference = $request->input('reference');
    ...
}