DOCUMENT_ROOT
GATEWAY_INTERFACE
HTTP_ACCEPT
HTTP_ACCEPT_ENCODING
HTTP_ACCEPT_LANGUAGE
HTTP_CONNECTION
HTTP_COOKIE
HTTP_HOST
HTTP_UA_CPU
HTTP_USER_AGENT
PATH
QUERY_STRING
REMOTE_ADDR
REMOTE_PORT
REQUEST_METHOD
REQUEST_URI
SCRIPT_FILENAME
SCRIPT_NAME
SERVER_ADDR
SERVER_ADMIN
SERVER_NAME
SERVER_PORT
SERVER_PROTOCOL
SERVER_SIGNATURE
SERVER_SOFTWARE