php resource application

Hi, I have a working client which authenticates with the radius server, I wanted to know if anyone has had experience of using a php/sql application called mrbs. I want the application to use radius authentication to authenticate users logging into this resource booking application, there are scripts provided for other forms of authentication (ie pam, ldap, smb) however wanted to know if anyone has created a php or any other kind of script to do this. It looks like I will need to add php script to authenticate but not sure what needs to go in it. Charnjit