Using PHP and LDAP to connect to AD

Hi there,

apologies for any mistakes as this is my first post.

I am trying to retrieve the PO box in the address information from a user in Active Directory using some kind of php coding. I have found various examples but cannot find a simple step by step guide as I am a novice in this area. I currently have an AD on server 2008 with a web page on a web server(also 2008, running IIS) that is coded in php and I need to retrive the PO box from an active directory entry for a user. Is this possible.

Thanks in advance