Read/Write file to a server. Android

I am creating this mobile app for my school, and I need help. I am creating these GUI prefabs clips

, like the Mobile versions of Twitter & Facebook that have the Profile Pic, Name, Post text, likes, shares, etc. One thing, however, is that when a user “posts” it is supposes to save in an XML format. How can I get this XML file onto my webserver using Android?

IF I can do it through PHP, Ill be grateful!!!

You just need to adapt this:

http://wiki.unity3d.com/index.php?title=Server_Side_Highscores