PHP LDAP and authentication with Windows Domain

I am trying to build a webpage in PHP that will be able to search, create or modify users on the the network. So far I am able to do all three. The problem comes when I try to go to my home directory to open a called test.txt.

I use the fopen and fread but it says that the permission are denied. The reason that I want to access the users (in this case its me) home directory is that i can edit some of the files to add printers or see what PC there login to. One of the Sys Admin said that I need to Authenticate the Windows Domain like a impersonation to pass the username and passwd to the server so I can access the home directory.