• • 网页. php**

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\ProductController;

Route::post('/products/{qty}/add', 'ProductController@addProduct')->name('addProduct');

• • 产品列表. blade. php**

<form action="{{ route('addProduct', 1) }}" method="post" class="ui form">
  <input type="text" name="qty" value="1" />
  <button type="submit" class="btn btn-primary" type="button">Add</button>
</form>

• • 应用程序/Http/控制器/产品控制器. php**

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class ProductController extends Controller
{
    public function addProduct(Request $request, $qty)
    {
        dd($qty);
    }
}

但是控制器类存在吗？