Update url parameters on form submit based on selections - php

Question

I want to update the url with the selected options in the form and send it to session but i keep receiving : (Undefined variable: country).
How can fix this please ? and i am very beginner so excuse my dumb mistakes .
My route :
Route::post('/{country}/{region}/{city}', [
'as' => 'locationFinder',
'uses' => 'User\UserLocationsController#store']);
My controller :
class UserLocationsController extends Controller
{
public function store(Request $request, Country $country, Region $region, City $city)
{
session()->put($country->name, $region->name, $city->name);
return redirect()->route('welcome.index', [$country, $region,
$city]);
}
}
My view :
<form action="{{ route('locationFinder',[$country, $region, $city]) }}" method="POST">
<div class="form-group">
<select class="form-control" name="country_id" id="country_id">
<option value="0" disable="true" selected="true"> Select Country </option>
#foreach ($countries as $key => $value)
<option value="{{$value->id}}">{{ $value->name }}</option>
#endforeach
</select>
</div>
<div class="form-group">
<select class="form-control" name="region_id" id="region_id">
<option value="0" disable="true" selected="true"> Select Region </option>
</select>
</div>
<div class="form-group">
<select class="form-control" name="districts" id="districts">
<option value="0" disable="true" selected="true"> Select City </option>
</select>
</div>
<div class="form-group">
<button class="btn btn-primary">submit</button>
</div>
<input type="hidden" name="_token" value="{{ csrf_token() }}">
</form>
My CountryController :
class CountryController extends Controller
{
public function countries(){
$countries = Country::all();
return view('welcome', compact('countries'));
}
public function regions(){
$countries_id = Input::get('country_id');
$regencies = Region::where('country_id', '=', $countries_id)->get();
return response()->json($regencies);
}
public function cities(){
$regions_id = Input::get('region_id');
$districts = City::where('region_id', '=', $regions_id)->get();
return response()->json($districts);
}
}

Answer 1

in the controller you pass "$country"... but in your view you are using "$countries" in the foreach
controller:
..
return redirect()->route('welcome.index', [$country, $region,
$city]);
..
view:
#foreach ($countries as $key => $value)
<option value="{{$value->id}}">{{ $value->name }}</option>
#endforeach