Nginx/Apache/Caddy + php-fpm + something like MySQL if your database lives on the same server as your application. PHP in its default form isn’t a persistent process[0], so you will typically have a web server accepting the requests and forwarding them onto PHP to generate a response.

0: it actually usually is these days for performance reasons, with a pool of processes that are reused. But the mental model is one short-lived process per request