php 将导入文件显示在页面上的问题
需求是这样的:
选择文件后,文件即可显示在网页上,如果确定导入,点击导入按钮即可存入到数据库内。
页面是这样的:
现在问题是点击选择图片按钮,不能显示文件内容,只有点击导入按钮才会显示文件内容。
请问这要怎么办? 如果需求有问题可略微改动一下,但不可点击导入才显示文件内容。
贴上部分代码:
php菜鸟,求大神指点!! 真的不会php! 好纠结!
回复讨论(解决方案)
这不是会不会 php 的问题
而是守不守规矩的问题
浏览器出于安全的原因,不能通过 js 读取本地文件内容。这就是规矩
你必须先上传,再返回显示
如果是这样的:
点击显示文件按钮,文件显示在页面上,这个实现了。
但是我怎么控制导入,点击导入按钮,数据才可以存到数据库内。
这个有什么条件控制吗,只有点击才可以执行后面的代码操作?
点击显示文件按钮 文件已经被上传了,当然也被保存在服务器中
此时不但要返回待显示的内容,还要把文件名传回去
这样 点击导入按钮 就可把文件名发送出去
楼主做导入,是否是选择文件->导入,如果仅仅点击导入,你又何曾选择文件?
选择文件,点击导入,把选择的文件存入了临时目录,上传成功,服务端就会获取到文件内容的地址,文件名,格式等。
要先上?才可以?示。
安全限制了。
了解了解 谢谢大家!

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