I am wondering what the best way is to have my Apache/PHP server accept an XML file that is sent using an ASP Send function. My client is using ASP to send a .5 to 2MB XML string, which I must accept and save to disk.

I have built the webpages to do this with user interaction (ie: click to add a file, and upload by clicking submit), but I am stumped on how to do this through an automated means. I must be missing something really...