php小例子，此例可在页面内添加数据，上传到后台数据库中，然后可以在客户端导出为excel格式。可以用于简单的收集数据的网站。-php small example, in this case can be added to the page within the data uploaded to the back-end database, which can then be exported to excel format on the client side. Can be used for