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In order SSI to work, the files containing
the include directive should have ".shtml" extension
instead of just ".html".
Here is an example: Let's say that we have a file called "test.shtml" which
uses SSI to include a file called "test.inc".
Here is the content of the "test.shtml" file:
<!--begin-->
<HTML>
<HEAD>
<TITLE>SSI test</TITLE>
</HEAD>
<BODY>
<P>This is a test page. The included file should display below.</p>
<!--#include virtual="test.inc"-->
</BODY>
</HTML>
<!--end-->
Here is some more information on SSI:
A server-side include is a variable value (for
example, a file "Last modified" date) that a server can
include in an HTML file before it sends it to the requestor. If you're
creating a Web page, you can insert an include statement in the HTML
file that looks like this:
<!--#echo var="LAST_MODIFIED"-->
The server will obtain the last-modified date for the file and insert
it before the HTML file is sent to requestors.
LAST_MODIFIED is one of several environment variables that an operating
system can keep track of and that can be accessible to a server program.
The server administrator can make these environment variables usable
when the system is set up.
A Web file that contains server-side include statements (such as the "echo" statement
above) is usually defined by the administrator to be a file with an ".shtml" suffix.
You can think of a server-side include as a limited form of common
gateway interface application. In fact, the CGI is not used.
The server simply searches the server-side include file for CGI environment
variables, and inserts the variable information in the places in the
file where the "include" statements have been inserted.
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