namespace App\Http\Controllers\Pdf;
use App\Models\PDF;
use App\Models\TestMcq;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
class TestPdfController extends Controller
{
    public function createPDF($id) {
        $TestMcq = TestMcq::where('test_id', $id)->get();
        $data = [
            'title' => 'Welcome to ItSolutionStuff.com',
            'date' => date('m/d/Y')
        ];
        $pdf = PDF::loadView('pdf.test', $data);
        return $pdf->download('test.pdf');
      }
}

web.php

Route::get('/test/pdf/{id}', [TestPdfController::class, 'createPDF']);

'providers' => ServiceProvider::defaultProviders()->merge([
        Mccarlosen\LaravelMpdf\LaravelMpdfServiceProvider::class,
        /*
         * Package Service Providers...
         */
        /*
         * Application Service Providers...
         */
        App\Providers\AppServiceProvider::class,
        App\Providers\AuthServiceProvider::class,
        // App\Providers\BroadcastServiceProvider::class,
        App\Providers\EventServiceProvider::class,
        App\Providers\RouteServiceProvider::class,
        Yajra\DataTables\DataTablesServiceProvider::class,
    ])->toArray(),
/*
|--------------------------------------------------------------------------
| Class Aliases
|--------------------------------------------------------------------------
|
| This array of class aliases will be registered when this application
| is started. However, feel free to register as many as you wish as
| the aliases are "lazy" loaded so they don't hinder performance.
|
*/
'aliases' => Facade::defaultAliases()->merge([
        // 'Example' => App\Facades\Example::class,
        'PDF' => Mccarlosen\LaravelMpdf\Facades\LaravelMpdf::class,
        'DataTables' => Yajra\DataTables\Facades\DataTables::class,
    ])->toArray(),

<details>
<summary>英文:</summary>

    /*
     * Package Service Providers...
     */
    /*
     * Application Service Providers...
     */
    App\Providers\AppServiceProvider::class,
    App\Providers\AuthServiceProvider::class,
    // App\Providers\BroadcastServiceProvider::class,
    App\Providers\EventServiceProvider::class,
    App\Providers\RouteServiceProvider::class,
    Yajra\DataTables\DataTablesServiceProvider::class,
])->toArray(),
/*
|--------------------------------------------------------------------------
| Class Aliases
|--------------------------------------------------------------------------
|
| This array of class aliases will be registered when this application
| is started. However, feel free to register as many as you wish as
| the aliases are "lazy" loaded so they don't hinder performance.
|
*/
'aliases' => Facade::defaultAliases()->merge([
    // 'Example' => App\Facades\Example::class,
    'PDF' => Mccarlosen\LaravelMpdf\Facades\LaravelMpdf::class,
    'DataTables' => Yajra\DataTables\Facades\DataTables::class,
])->toArray(),

I didn't know why gives me an error ?
...............................................................................................
I don't know why it gives me this error. I tried to deal with it a lot, but it gives me this strange error. I made another file and put exactly the same things in it and it worked, but I need to add it to this project
</details>
# 答案1
**得分**: 0
PDF不存在于app/Models文件夹中。尝试以下操作：
```php
use App\Models\PDF; // 替换为"use PDF"（通过别名调用）或"use Mccarlosen\LaravelMpdf\Facades\LaravelMpdf as PDF"（直接调用）