CGI Environment Variables
NCSA's documentation on web server environment variables, including those always set by the server and those that are only set if a CGI program is called. Also contains a demonstration which shows the environment variables in action.
December 21st 2005
Free
Special Purpose Environment Variables
These are environment variables specific to the Apache servers which control the way Apache interacts with specific browsers.
December 15th 2005
Free
Reference to Apache ECHO Variables
Reference to all valid ECHO commands (returns environmental variables) to paste into your HTML document for parsing by your Apache webserver.
December 6th 2005
Free
The Complete List of ECHO Environmetal Variables
This page offers what seems to be a complete list of ECHO comment tags that return a servers environmental variables. As new variables are found they are posted.
December 1st 2005
Free
How to print out environment variables from Perl
An article about a simple CGI program that demonstrates how to access and print every environment variable from the Perl/CGI environment. Free source code. Good for debugging.
November 27th 2005
Free
CGI Environmental Variables
Lists all standard environmental variables made available to CGI programs by web servers, and provides a brief explanation of each one of them.
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