/**
  * POST
  * admin/cate
  * 添加
  */
 public function store(Request $request)
 {
  $input = $request->all();
 
  $rule = [
   'name' => 'required',
  ];
 
  $message = [
   'name.required' => 'name not allow null'
  ];
 
 
  $validate = Validator::make($input, $rule, $message);
 
  if (!$validate->passes()) {
   return back()->withErrors($validate);
 
  }
  return redirect('admin/cate');
 }

 $validate->errors()->add('key','error message');
    return back()->withErrors($validate);

 @if(count($errors)>0)
    @foreach($errors->all() as $value
     {{$value}}
    @endforeach
 @endif