.PHTML are the web page that contains PHP code; parsed by a PHP engine on the Web server, which dynamically generates HTML; often used for database access, such as retrieving data from a MySQL database; can be run using Apache or Windows Server with the PHP engine installed.
Detailed information for file extension PHTML:
Primary association: Embedded Perl (ePerl) File
Mime type: application/x-httpd-eperl, text/html