请这样

use Validator;public function store(Request $request){    //$data = $request->all();    $data = json_depre($request->payload, true);    $rules = [        'name' => 'digits:8', //Must be a number and length of value is 8        'age' => 'digits:8'    ];    $validator = Validator::make($data, $rules);    if ($validator->passes()) {        //TODO Handle your data    } else {        //TODO Handle your error        dd($validator->errors()->all());    }}

位数：值

验证中的字段必须是数字，并且必须具有确切的值长度。