Basic SSI directives Syntax

<!--#element attribute=value attribute=value ... -->

Today's date

<!--#config timefmt="%Y/%m/%d %a %H:%M:%S" -->
Today is <!--#echo var="DATE_LOCAL" -->

Modification date of the file

This document last modified <!--#flastmod file="index.html" -->

Including the results of a CGI program

<!--#include virtual="/cgi-bin/counter.pl" -->
<!--#include virtual="/cgi-bin/example.cgi?argument=value" -->

You can use "#exec cgi=" directive, but it can be disabled using the IncludesNOEXEC Option.

Including a standard footer

<!--#include virtual="/footer.html" -->

Executing commands

<!--#exec cmd="ls" -->

This feature is dangerous. You can allow SSI, but not the exec feature, with the IncludesNOEXEC argument to the Options directive.

Setting variables

<!--#set var="modified" value="$LAST_MODIFIED" -->
<!--#set var="date" value="${DATE_LOCAL}_${DATE_GMT}" -->

Conditional expressions

<!--#if expr="test_condition" -->
<!--#elif expr="test_condition" -->
<!--#else -->
<!--#endif -->