Can I use the SSI include directive?
Yes you can use the #include directive to include files
into your current html document. The "file="
or "virtual=" elements can both
be used. For example, let's say you were trying to include
myfooter.html into mypage.html. Both documents exist in a directory
called "mydir" in your main htdocs area.
Here is how to use either form of the #include server
side include in mypage.html to include myfooter.html in subdirectory
"mydir" in your htdocs area.
<!--#include file="myfooter.html" -->
<!--#include virtual="/mydir/myfooter.html" -->
Notice that the "file" element is relative to the current
document directory and the "virtual" element is relative to the
the main htdocs (DocumentRoot) directory.
Related Question: How do I turn on SSI
Includes?