Use Server Side Includes, SSI, (inside HTML comments) on Apache webservers to include dynamic content in your HTML pages.
Activate SSI in your web directory by creating a file called ".htaccess" (begins with period, but does not end with .txt or .html). And add this line:
AddHandler server-parsed .html .htm
.shtml .include
SSI Syntax:
<!--#command attribute = "value" -->
Example 1 - include header.html file into document:
<!--#include virtual = "header.html"
-->
Example 2 - include a formatted last modified date into document:
<!--#config timefmt =
"%D - %I:%M %p" -->
Page last
modified on <!--#echo var = "LAST_MODIFIED" -->
example 2 output: Page
last modified on 02/05/01 - 03:38 AM
More info from Apache: http://httpd.apache.org/docs/howto/ssi.html