验证请求中的验证挂钩

您可以覆盖getValidatorInstance()方法在自定义请求类是这样的：

protected function getValidatorInstance() 
{ 
    $validator = parent::getValidatorInstance(); 
    // here you can apply hook (example hook taken from documentation): 
    $validator->after(function ($validator) { 
     if ($this->somethingElseIsInvalid()) { 
      $validator->errors()->add('field', 'Something is wrong with this field!'); 
     } 
    }); 
    return $validator; 
}