Here is the browser type (as shown by PHP):
CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
The code used is echo $_SERVER['HTTP_USER_AGENT'];

Here is the output of more server variables:
close -- Variable:HTTP_CONNECTION
en-us,en;q=0.5 -- Variable:HTTP_ACCEPT_LANGUAGE
38.107.191.100 -- Variable:REMOTE_ADDR
80 -- Variable:SERVER_PORT
/HTDE/servervariables.php -- Variable:REQUEST_URI