A simple method would be to use PHP for concatenation 3:
Step 1) . In your .htaccess file, enable the server to parse the files .htmland .htmas .phpfiles:
AddType application/x-httpd-php .html .htm
AddHandler application/x-httpd-php .html .htm
Step 2) In page.htmlwrite (only) the following:
<?php
include '/home/example/public_html/header.html';
include '/home/example/public_html/body.html';
include '/home/example/public_html/footer.html';
?>
N.B. /home/example/public_html/ . .
, page.html, .html .php PHP .html.