To process files with a .htm or .html file extension as PHP files you must add the following line to the file.htaccess (if this file does not exist, create it on the site ROOT).
AddType application/x-httpd-php .html .htm
To process files with a .htm or .html file extension as PHP files you must add the following line to the file.htaccess (if this file does not exist, create it on the site ROOT).
AddType application/x-httpd-php .html .htm