未定义变量 $districts，但 $provinces 和 $regcies 可以工作

Question

我不需要该模型，因为我看到 $province 和 $regcies 正在工作，但是 $districts 和 $villages > 未定义。

控制器

class LocationController extends Controller
{
    public function index()
    {
        $provinces = DB::table('reg_provinces')->pluck('name');
        $regencies = DB::table('reg_regencies')->pluck('name');
        $districts = DB::table('reg_districts')->pluck('name');
        $villages = DB::table('reg_villages')->pluck('name');

        return view('index',
            ['provinces' => $provinces],
            ['regencies' => $regencies],
            ['districts' => $districts],
            ['villages' => $villages],
        );
    }
}

视图

     <div class="dropend mb-3">
        <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data-bs-toggle="dropdown" aria-expanded="false">
          Select Province
        </button>
        <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
          @foreach ($provinces as $province)
            <li class="dropdown-item">{{ $province }}</li>
          @endforeach
        </ul>
      </div>

      <div class="dropend mb-3">
        <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data-bs-toggle="dropdown" aria-expanded="false">
          Select City
        </button>
        <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
          @foreach ($regencies as $regency)
            <li class="dropdown-item">{{ $regency }}</li>
          @endforeach
        </ul>
      </div>

      <div class="dropend mb-3">
        <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data-bs-toggle="dropdown" aria-expanded="false">
          Select District
        </button>
        <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
          @foreach ($districts as $district)
            <li class="dropdown-item">{{ $district }}</li>
          @endforeach
        </ul>
      </div>

      <div class="dropend mb-3">
        <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="dropdownMenuButton1" data-bs-toggle="dropdown" aria-expanded="false">
          Select Subdistrict
        </button>
        <ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
          @foreach ($villages as $village)
            <li class="dropdown-item">{{ $village }}</li>
          @endforeach
        </ul>
      </div>

Answer 1

我认为您需要将它们全部作为第二个参数的一个数组发送：

class LocationController extends Controller
{
    public function index()
    {
        $provinces = DB::table('reg_provinces')->pluck('name');
        $regencies = DB::table('reg_regencies')->pluck('name');
        $districts = DB::table('reg_districts')->pluck('name');
        $villages = DB::table('reg_villages')->pluck('name');

        return view('index',
            [
              'provinces' => $provinces,
              'regencies' => $regencies,
              'districts' => $districts,
              'villages' => $villages
             ],
        );
    }
}