HTTP_ACCEPT
HTTP_USER_AGENT
HTTP_ACCEPT_LANGUAGE
HTTP_ACCEPT_ENCODING
HTTP_ACCEPT_CHARSET
HTTP_KEEP_ALIVE
HTTP_COOKIE
HTTP_PRAGMA
HTTP_CACHE_CONTROL
PATH
SERVER_SIGNATURE
SERVER_SOFTWARE
SERVER_NAME
SERVER_ADDR
SERVER_PORT
REMOTE_ADDR
DOCUMENT_ROOT
SERVER_ADMIN
SCRIPT_FILENAME
REMOTE_PORT
GATEWAY_INTERFACE
SERVER_PROTOCOL
REQUEST_METHOD
QUERY_STRING
SCRIPT_NAME
PHP_SELF
REQUEST_TIME
argv
argc