Variable Name	Description
DOCUMENT_name	The complete local directory path of the current document.
DOCUMENT_URI	The local path of the current document referenced to the base directory of the webspace where the ENV script is located.
QUERY_STRING_UNESCAPED	The unescaped query string sent by the client browser, all shell-special characters escaped with \.
DATE_LOCAL	The current local date and time.
DATE_GMT	The current Greenwich Mean date and time.
LAST_MODIFIED	The date and time of the last modification of the current document.
REMOTE_ADDR	The IP address of the remote client browser. If your are using an anonymous proxy, it's IP will show here.
QUERY_STRING	The raw query string sent from the remote browser.
SERVER_SOFTWARE	The name of the HTTP server software.
SERVER_name	The local computer name of the HTTP server.
GATEWAY_INTERFACE	The name/version of the Common Gateway Interface served on this HTTP server.
SERVER_PROTOCOL	The name/version of HTTP served on this HTTP server.
SERVER_PORT	The IP port the HTTP server is answering on.
REQUEST_METHOD	The method by which the current document was requested.
PATH_INFO	The extra path info that is sent. This information is regarded as virtual (the path is relative to the base directory of the HTTP server).
PATH_TRANSLATED	The 'PATH_INFO' variable translated from virtual to local (physical) disk location.
SCRIPT_name	The virtual path of the script being executed.
REMOTE_HOST	The host name of the remote client. If your are using an anonymous proxy, it's IP will show here.
AUTH_TYPE	The authentication method used to validate the remote client.
REMOTE_USER	The user name used to validate authentication from the remote client. Great for use in password protected sites.
REMOTE_IDENT	The remote user name if supporting RFC931 identification.
CONTENT_TYPE	The content type of the attached information in the case of a POST or PUT.
CONTENT_LENGTH	The length of the attached information in the case of a POST or PUT.
HTTP_ACCEPT	A comma separated list of mime types that are accepted by the remote browser.
HTTP_USER_AGENT	The name of the remote client browser software.
REFERER	The URL of the HTML document which referred the remote client to this document.
FROM	The name (most likely the-mail address) of the remote client user. Unlikely to be set.
FORWARDED	The name of the proxy server through which this document is being processed.
ACCEPT_language	The human languages that are acceptable to the remote client.
HTTP_COOKIE	The cookie sent by the remote client.