public function store(PincardRequest $request){

}

$request可以获取表单提交过来的值，那怎么给这个添加值进去呢

添加的值和表单提交过来的一样可以被调用

提交表单后给$request追加一个自定义的值给
PincardRequest做验证

class PincardRequest extends Request
{

/**
 * Determine if the user is authorized to make this request.
 *
 * @return bool
 */
public function authorize()
{
    return true;
}

/**
 * Get the validation rules that apply to the request.
 *
 * @return array
 */
public function rules()
{
    return [
        'yd'=>array('required','regex:/\p{Han}/u'),

    ];
}

public function messages(){
    return [
        'yd.required'=>'不能为空！',

    ];
}

}