Laravel 5.1文件上传验证

 {!! Form::open(['url'=>'admins']) !!}
  {!! Form::input('file','photo',null,['class'=>'photo_input']) !!} 

 public function rules()
{
    return [
       'username'=>'required|max:127|min:3|unique:users,username,'.$this->username,
       'email'=>'required|max:127|email|min:3|unique:users,email,'.$this->email,
       'password'=>'required|max:127|min:5|confirmed',
       'password_confirmation'=>'required|max:127|min:5|',
       'role'=>'required|max:127|min:5|in:programmer,admin,employee',
       'photo' => 'mimes:jpg,jpeg,bmp,png,gif'
    ];
}

背后的原因是您需要在form标记中定义属性enctype = "multipart/form-data"。因此，在使用Laravel 5.X Form Facade时，您需要在form open数组中传递属性files => true，就像一样

{!! Form::open(['url'=>'admins','files' => true]) !!}
                              //^^^^^^^^^^^^^^^^ added

源文档

这个问题也是由于上传的文件大小过大，而php.ini 中允许

请检查

上传_max_filesize

和

post_max_size

在php.ini 中

您还可以通过扩展Validator 来验证图像大小

In Your Controller
Validator::extend('img_upload_size', function($attribute, $value, $parameters)
{
 $file = Request::file($attribute);
 $image_size = $file->getClientSize();
 if( (isset($parameters[0]) && $parameters[0] != 0) && $image_size > $parameters[0]) return false;
 return true;
});

In Validation Rules
 return [
 'username'=>'required|max:127|min:3|unique:users,username,'.$this->username,
    'email'=>'required|max:127|email|min:3|unique:users,email,'.$this->email,
    'password'=>'required|max:127|min:5|confirmed',
    'password_confirmation'=>'required|max:127|min:5|',
    'role'=>'required|max:127|min:5|in:programmer,admin,employee',
 'photo' => 'required|mimes:jpeg,bmp,png|img_upload_size:1000000',//!MB
]

我修复了它，原因是我没有在表单中添加enctype。

{!! Form::open(['url'=>'admins','enctype'=>'multipart/form-data']) !!}