Differences HTML to PHP

When it comes to speed it is better to have static pages (HTML) than dynamic (PHP)

besides you use Cloudflare so you can say there “cache everything

and then CF serves in most cases everything from their cache
and thus there is less work for this server
and of course less HITS (limit is 50,000 per day)

and if you use PHP you have to pay attention to security
and you are more susceptible to suspension in the event of a DDoS attack