I've written a CMS for a client in PHP that allows them to (among other things) add member information to a database. They asked if I can create a folder on their local network, in their office, based on the member id. Specifically on the shared S: drive on their local server. Something like:

S:/members/948756

The website is not running on this server, but on a hosted solution somewhere else.

I understand PHP is server side and won't create anything anywhere other than on the server which its installed.

I'm hoping there is a client side way of mkdir(), or some way of running a function that will create a directory on the user's side.

Any ideas?