Full list of ServerVariables

<p><font face="arial,helvetica" size="2"><b>ALL_HTTP</b> are all HTTP headers 
sent by the client. <br>
<br>
<b>ALL_RAW</b> retrieves all headers in the raw-form. <br>
<br>
<b>APPL_MD_PATH</b> retrieves the metabase path. <br>
<br>
<b>APPL_PHYSICAL_PATH</b> retrieves the physical path corresponding to the 
metabase path. <br>
<br>
<b>AUTH_PASSWORD</b> is the value entered in the client's authentication dialog.
<br>
<br>
<b>AUTH_TYPE</b> is the authentication method that the server uses to validate 
users. <br>
<br>
<b>AUTH_USER</b> is the raw authenticated user name. <br>
<br>
<b>CERT_COOKIE</b> is an unique ID for client certificate which is returned as a 
string. <br>
<br>
<b>CERT_FLAGS</b> is where bit0 is set to 1 if the client certificate is 
present, and bit1 is set to 1 if the certifying authority of the client 
certificate is invalid. <br>
<br>
<b>CERT_ISSUER</b> is the issuer field of the client certificate. <br>
<br>
<b>CERT_KEYSIZE</b> is the number of bits in Secure Sockets Layer connection key 
size. <br>
<br>
<b>CERT_SECRETKEYSIZE</b> is the number of bits in the server certificate 
private key. <br>
<br>
<b>CERT_SERIALNUMBER</b> is the serial number field of the client certificate.
<br>
<br>
<b>CERT_SERVER_ISSUER</b> is the issuer field of the server certificate. <br>
<br>
<b>CERT_SERVER_SUBJECT</b> is the subject field of the server certificate. <br>
<br>
<b>CERT_SUBJECT</b> is the subject field of the client certificate. <br>
<br>
<b>CONTENT_LENGTH</b> is the length of the content header as sent by the client.
<br>
<br>
<b>CONTENT_TYPE</b> is the data type of the content. <br>
<br>
<b>GATEWAY_INTERFACE</b> is the revision of the CGI specification used by the 
server. <br>
<br>
<b>HTTP_<<i>HeaderName</i>></b> is the value stored in the header <i>HeaderName</i>.
<br>
<br>
<b>HTTP_ACCEPT</b> returns the value of the Accept header. <br>
<br>
<b>HTTP_ACCEPT_ENCODING</b> returns the value of the Accept encoding. <br>
<br>
<b>HTTP_ACCEPT_LANGUAGE</b> returns a string that specifies the language to be 
used for displaying content. <br>
<br>
<b>HTTP_CONNECTION</b> returns a string containing information about the 
connection. <br>
<br>
<b>HTTP_COOKIE</b> returns the cookie string that was included with the request.
<br>
<br>
<b>HTTP_HOST</b> returns a string containing information about the host. <br>
<br>
<!--
<b>HTTP_PRAGMA</b> CAN FIND NO INFO ABOUT THIS??????????
<br><br> 
--><b>HTTP_REFERER</b> returns a string containing the original URL when a 
redirect has occurred. <br>
<br>
<b>HTTP_USER_AGENT</b> returns a string describing the browser used to send the 
request. <br>
<br>
<b>HTTP_UA_PIXELS</b> returns a string detailing the screen resolution of the 
user agent. <br>
<br>
<b>HTTP_UA_COLOR</b> returns a string with color information. <br>
<br>
<b>HTTP_UA_OS</b> returns a string stating the operating system of the user 
agent. <br>
<br>
<b>HTTP_UA_CPU</b> returns a string stating the processor type used by the user 
agent. <br>
<br>
<b>HTTPS</b> returns ON if the request came in through secure channel or OFF if 
the request is through a non-secure channel. <br>
<br>
<b>HTTPS_KEYSIZE</b> is the number of bits in Secure Sockets Layer (SSL) 
connection key size. <br>
<br>
<b>HTTPS_SECRETKEYSIZE</b> is the number of bits in server certificate private 
key. <br>
<br>
<b>HTTPS_SERVER_ISSUER</b> is the issuer field of the server certificate. <br>
<br>
<b>HTTPS_SERVER_SUBJECT</b> is the subject field of the server certificate. <br>
<br>
<b>INSTANCE_ID</b> is the ID for the Internet Information Server (IIS) instance 
in text format. <br>
<br>
<b>INSTANCE_META_PATH</b> is the metabase path for the instance of Internet 
Information Server (IIS) that responds to the request. <br>
<br>
<b>LOCAL_ADDR</b> returns the server address on which the request came in. <br>
<br>
<b>LOGON_USER</b> is the Windows account that the user is logged into. <br>
<br>
<b>PATH_INFO</b> is extra path information as given by the client. <br>
<br>
<b>PATH_TRANSLATED</b> is a translated version of <b>PATH_INFO</b> that takes 
the path and performs any necessary virtual-to-physical mapping. <br>
<br>
<b>QUERY_STRING</b> is the query information stored in the string following the 
question mark (?) in the HTTP request. <br>
<br>
<b>REMOTE_ADDR</b> is the Internet Protocol (IP) address of the remote host 
making the request. <br>
<br>
<b>REMOTE_HOST</b> is the name of the host making the request. <br>
<br>
<b>REMOTE_USER</b> is an unmapped user-name string sent in by the user. <br>
<br>
<b>REQUEST_METHOD</b> is the method used to make the request. <br>
<br>
<b>SCRIPT_NAME</b> is a virtual path to the script being executed. <br>
<br>
<b>SERVER_NAME</b> is the server's host name, Domain Name Server (DNS) alias, or 
Internet Protocol (IP) address. <br>
<br>
<b>SERVER_PORT</b> is the port number to which the request was sent. <br>
<br>
<b>SERVER_PORT_SECURE</b> is a string that contain a 1 if the request is being 
handled on the secure port, otherwise it is 0. <br>
<br>
<b>SERVER_PROTOCOL</b> is the name and revision of the request information 
protocol. <br>
<br>
<b>SERVER_SOFTWARE</b> is the name and version of the server software that 
answers the request and runs the gateway. <br>
<br>
<b>URL</b> is the base portion of the URL.</font></p>