Server Variables
| Variable | Description |
|---|---|
| ALL_HTTP | Returns all HTTP headers sent by the client. Always prefixed with HTTP_ and capitalized |
| ALL_RAW | Returns all headers in raw form |
| APPL_MD_PATH | Returns the meta base path for the application for the ISAPI DLL |
| APPL_PHYSICAL_PATH | Returns the physical path corresponding to the meta base path |
| AUTH_PASSWORD | Returns the value entered in the client's authentication dialog |
| AUTH_TYPE | The authentication method that the server uses to validate users |
| AUTH_USER | Returns the raw authenticated user name |
| CERT_COOKIE | Returns the unique ID for client certificate as a string |
| CERT_FLAGS | bit0 is set to 1 if the client certificate is present and bit1 is set to 1 if the cCertification authority of the client certificate is not valid |
| CERT_ISSUER | Returns the issuer field of the client certificate |
| CERT_KEYSIZE | Returns the number of bits in Secure Sockets Layer connection key size |
| CERT_SECRETKEYSIZE | Returns the number of bits in server certificate private key |
| CERT_SERIALNUMBER | Returns the serial number field of the client certificate |
| CERT_SERVER_ISSUER | Returns the issuer field of the server certificate |
| CERT_SERVER_SUBJECT | Returns the subject field of the server certificate |
| CERT_SUBJECT | Returns the subject field of the client certificate |
| CONTENT_LENGTH | Returns the length of the content as sent by the client |
| CONTENT_TYPE | Returns the data type of the content |
| GATEWAY_INTERFACE | Returns the revision of the CGI specification used by the server |
| HTTP_<HeaderName> | Returns the value stored in the header HeaderName |
| HTTP_ACCEPT | Returns the value of the Accept header |
| HTTP_ACCEPT_LANGUAGE | Returns a string describing the language to use for displaying content |
| HTTP_COOKIE | Returns the cookie string included with the request |
| HTTP_REFERER | Returns a string containing the URL of the page that referred the request to the current page using an <a> tag. If the page is redirected, HTTP_REFERER is empty |
| HTTP_USER_AGENT | Returns a string describing the browser that sent the request |
| HTTPS | Returns ON if the request came in through secure channel or OFF if the request came in through a non-secure channel |
| HTTPS_KEYSIZE | Returns the number of bits in Secure Sockets Layer connection key size |
| HTTPS_SECRETKEYSIZE | Returns the number of bits in server certificate private key |
| HTTPS_SERVER_ISSUER | Returns the issuer field of the server certificate |
| HTTPS_SERVER_SUBJECT | Returns the subject field of the server certificate |
| INSTANCE_ID | The ID for the IIS instance in text format |
| INSTANCE_META_PATH | The meta base path for the instance of IIS that responds to the request |
| LOCAL_ADDR | Returns the server address on which the request came in |
| LOGON_USER | Returns the Windows account that the user is logged into |
| PATH_INFO | Returns extra path information as given by the client |
| PATH_TRANSLATED | A translated version of PATH_INFO that takes the path and performs any necessary virtual-to-physical mapping |
| QUERY_STRING | Returns the query information stored in the string following the question mark (?) in the HTTP request |
| REMOTE_ADDR | Returns the IP address of the remote host making the request |
| REMOTE_HOST | Returns the name of the host making the request |
| REMOTE_USER | Returns an unmapped user-name string sent in by the user |
| REQUEST_METHOD | Returns the method used to make the request |
| SCRIPT_NAME | Returns a virtual path to the script being executed |
| SERVER_NAME | Returns the server's host name, DNS alias, or IP address as it would appear in self-referencing URLs |
| SERVER_PORT | Returns the port number to which the request was sent |
| SERVER_PORT_SECURE | Returns a string that contains 0 or 1. If the request is being handled on the secure port, it will be 1. Otherwise, it will be 0 |
| SERVER_PROTOCOL | Returns the name and revision of the request information protocol |
| SERVER_SOFTWARE | Returns the name and version of the server software that answers the request and runs the gateway |
| URL | Returns the base portion of the URL |
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