Sams Teach Yourself CGI in 24 Hours, Second Edition

XSSI

XSSI, or Extended SSI, is a group of advanced SSI directives that are built into the mod_include module included with versions 1.2 and later of the Apache Web server. These directives enable you to create more powerful server-parsed HTML documents than you can by using standard SSI directives.

First, the following sections provide a brief overview of the directives that are available with XSSI.

printenv

The printenv directive takes all the environment variables that are currently available in the Web server’s environment and dumps them to the screen. This is mainly useful for debugging purposes. If you’re trying to use environment variables with other XSSI directives, or with a CGI script, you can use the printenv directive to make sure ...