How to specify folder location on user's desktop?

I'm writing a script that will be stored on a shared server and accessed via an action by multiple users. The script would eventually save images into an already created folder on their respective desktops. This folder would have the same name for everyone, but seeing as each users path would differ due to their usernames, how do I make the save location in the script just point to that folder on the users desktop regardless of username?

Edit: Wait, would it be a matter of doing something like this: '~/Desktop/StandardUpload/' ?