A script to upload a file on the server

[chrbar]

Hello,

I have to allow an user to upload a file on the server without using a FTP software.
Thus I'm looking fo a php script which allow to upload a file on the server, in a special folder, and replace the existing file (same filename) by the new file.

I would like to secure this access via an user/password, but without a db (mySQL).

Do you know how to create this script?

Thanks,
Chris