$x = $SERVER_NAME;
#The name of the server host
$x = $REQUEST_METHOD;
#'GET', 'HEAD', 'POST' or 'PUT'
$x = $PHP_SELF;
#The filename of the currently executing script
$x = $HTTP_COOKIE_VARS["Varname"];
$x = $HTTP_GET_VARS["Varname"];
$x = $HTTP_POST_VARS["Varname"];
# variables that were posted using post, get or cookie.
$x = $REMOTE_ADDR;
# The IP address from which the user is viewing the current page.