Possible to use Server side PHP to edit Local XML?

I've created a simple PHP/XML app. For simplicity, I would like to host only the PHP files and have it save the XML locally to 开发者_如何学编程the user's computer. Is this possible?

You can offer the user the ability to download xml files which the user can choose to save on his/her hard drive. But you can't have direct write access to the client's disk from your server's php code.