Hey,
I'm looking for a solution to a similar kind of problem as phpbaby.
Let's see if I can explain it...
I have a website and PHP script already set up that allow users to upload images from their computer onto my website's server. Now that their images are sitting pretty on my web server, I want them to have the option of sending that uploaded image via a "post" method to ANOTHER server that already has a script set up to upload files sent via "post." Neither myself NOR my users have the ability of editing any files on this other server, but it DOES allow other websites to post content to it.
Thus, users will be able to upload their file to another server without having to select the file from their hard drive again.
I found an ASP script that does what I've described (http://www.codeproject.com/aspnet/TransferFilesWebserver.asp), but I need the same functionality in PHP. I've tried searching for it, but none of my searches have been successful and I'm a bit stumped now.
If anyone could help me with this, I'd greatly appreciate it!
Also, a word to phpbaby: you should probably check out doing what you have described via FTP, since that seems much more straight-forward than setting up a PHP script on your webserver to send files, and ANOTHER script on the receiving webserver(s) to receive the files (your users would probably be more willing to type in some FTP information than setting up and uploading a file to their server).