|string> */ public function rules(): array { return [ 'towho' => 'nullable|string|max:50', 'secret' => 'sometimes|boolean', 'text_title' => 'nullable|string|max:250', 'text_body' => 'required|string|max:2000', ]; } public function messages(): array { return [ 'text_body.required' => '留言内容不能为空！', 'text_body.max' => '留言内容不能超过 2000 个字符。', ]; } }