对不起，完整代码.
但是您应该以四种方式分配文件(无论是什么文件，图像，视频等):
一个文件名.两种文件类型.三个文件大小，四个文件内容.将文件作为四号的二进制对象.他们每个人都会在数据库中有一个特殊的字段.要检索它，您需要组装它们.

您也可以使用PHP手册来实现这些功能.

Sorry about the Full Code.
But you should, devide your file (no matter what file, images, videos,...) in four peaces:
one file name. two file type. three file size, four file content. take the file as a binery object for number four. each of them will be given a special field in DB. to retrieve it you need to assemble them.

you can also use PHP Manual for the functions.