1/1) BadMethodCallException方法[验证器]不存在。在Laravel 5.6中

use Illuminate\Support\Facades\Validator;

$validator = Validator::make($request->all(), [
    'field_name' => 'required|unique:table_name',
]);

use Illuminate\Support\Facades\Validator;

public function boot()
{
    Validator::extend('custom_rule', function ($attribute, $value, $parameters, $validator) {
        // 自定义验证逻辑
        return $value === 'expected_value';
    });
}

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

public function store(Request $request)
{
    $validator = Validator::make($request->all(), [
        'name' => 'required|string|max:255',
        'email' => 'required|email|unique:users',
        'password' => 'required|min:6',
    ]);

    if ($validator->fails()) {
        return redirect('register')
                    ->withErrors($validator)
                    ->withInput();
    }

    // 如果验证通过，继续处理数据
}