如何在Laravel中验证mark_to之后的mark_from

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class MyFormRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'mark_to' => 'required|date',
            'mark_from' => 'required|date|after:mark_to',
        ];
    }
}

namespace App\Http\Controllers;

use App\Http\Requests\MyFormRequest;

class MyController extends Controller
{
    public function store(MyFormRequest $request)
    {
        // 验证通过，执行相应的逻辑
        // ...
    }
}

Route::post('/form', 'MyController@store');