php - ceck client status

[Marcin]

Hi,
I'd like to wrie few php script to manage users sessions

Are there any posibility to ask freeradius, like nas does it, about client
status?
some virutal servers which can answer? for example. I'd like to know if
client bob is logged still? that i send to freeradius pacect
acc-status-client=bob, and FR aswer yes or no. something in that way.


-- 
Regards
Marcin / nicraM