the term "stats" used in this thread is not quite the same as the "stats" you refer to ala hlstats etc. Here its being used to refer to a script which provides information on a web page only about the current status of the game. meaning:
SERVER
hostname: bobs server
map: 2fort
timeleft: 15:23
Players
Name: bob
Frags: 14
Time: 48:58
Above being an over simplified example. Perhaps you might look at this link for an overly detailed example...
http://demo.phpua.com/index.php?mode=watch&server=0