php $_SERVER variable content :
HTTP_X_CC_ID => ccc04-01
HTTP_HOST => www.colliard.net
HTTP_USER_AGENT => CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
HTTP_ACCEPT => text/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
HTTP_ACCEPT_LANGUAGE => en-us,en;q=0.5
HTTP_ACCEPT_ENCODING => gzip
HTTP_ACCEPT_CHARSET => ISO-8859-1,utf-8;q=0.7,*;q=0.7
HTTP_CONNECTION => close
HTTP_CACHE_CONTROL => no-cache
HTTP_PRAGMA => no-cache
REMOTE_ADDR => 38.107.179.237
REMOTE_PORT => 51463
GATEWAY_INTERFACE => CGI/1.1
REQUEST_METHOD => GET
QUERY_STRING => 
REQUEST_URI => /
PHP_SELF => /index.php
REQUEST_TIME => 1327731974 (epoch time) aka 2012-01-28T07:26:14+01:00 Europe/Zurich CET (equiv. local swiss time)