laravel validations

//Controller

$validator = Validator::make($request->all(), [

'name' => 'required|max:255'

        ],

        [

            'name.required' => '請輸入名稱!',

        ]);

if ($validator->fails()) {

return back()->withErrors($validator)->withInput();

        }

//blade

@if ($errors->any())

<div class="alert alert-danger">

<ul>

@foreach ($errors->all() as $error)

<li>{{ $error }}</li>

@endforeach

</ul>

</div>

@endif

//api validation

$this->validate($request, [

             'is_important' => 'required',

         ]);