JavaScript Sniffing

window.navigator.appVersion
window.navigator.appName
window.navigator.userAgent =

PHP Sniffing

HTTP_USER_AGENT
CCBot/2.0 (http://commoncrawl.org/faq/)
REMOTE_ADDR
54.83.66.51
REMOTE_PORT
46938
_SERVER["HTTP_USER_AGENT"]
CCBot/2.0 (http://commoncrawl.org/faq/)
_SERVER["REMOTE_ADDR"]
54.83.66.51
_SERVER["REMOTE_PORT"]
46938