portal-api/app/Http/Controllers/Api/Client/AdministrativeDivisionController.php

<?php

namespace App\Http\Controllers\Api\Client;

use App\Http\Controllers\Controller;
use App\Models\Province;
use App\Models\Ward;
use Illuminate\Http\JsonResponse;

class AdministrativeDivisionController extends Controller
{
    public function provinces(): JsonResponse
    {
        return response()->json([
            'error' => false,
            'data'  => Province::query()->orderBy('code')->get(['code', 'name', 'full_name']),
        ]);
    }

    public function wards(string $province): JsonResponse
    {
        return response()->json([
            'error' => false,
            'data'  => Ward::query()->where('province_code', $province)->orderBy('name')->get(['code', 'name', 'full_name']),
        ]);
    }
}