What are the best practices for configuring file extensions to enable PHP processing in HTML files?

To enable PHP processing in HTML files, you need to configure your web server to recognize HTML files as PHP files. This can be done by adding the appropriate file extension mapping in the server configuration. By doing this, you can include PHP code within your HTML files and have it processed by the server before being served to the client. ```apache AddType application/x-httpd-php .html ```