How to connect a common engine in a subdomain?

Question

PHP

Good evening!
In general, I have a domain example.com, where I have the entire engine. There is also a subdomain test.example.com
How can I connect the engine in a subdomain? Or generally accept all requests to the main domain?
There is a way , but I strongly believe that it can be done more correctly require '/var/www/example.com/index.php';

Answer 1

The most logical option is if you have 1 engine and all requests from site.com and from *.site.com it accepts one and then it sorts out inside what domain called it and based on this it issues content