Remote access to database

[JackJack]

Hi everyone,
I installed XAMPP on a Windows server and I created a database. Now I'am trying to connect to this database from another server, not in the same network, using a PHP script but the connection always timed out. I tried a lot of solution I found in the web but none of them worked. The server is configured to remote access but I think XAMPP isn't or I configured it in the wrong way. Have you any working guide to recommend?
Thanks to anyone who will help me

[Altrea]

There is not much to know

- configure your firewall to allow external connections on port 3306
- create a database user for host % (any host)
- use the IP the xampp computer has as host, username and password to connect to the database.

Of cause these two connection members need to be in the same network (can reach each other)

[JackJack]

Thank you so much, I think the problem is the port. I have another question: the two member must be in the same network or it is only necessary that they can reach each other?

[Altrea]

What is the definition of a network? Multiple computers connected to each other.

They don't need to be in the same subnet if they can reach each other by routing.

[JackJack]

Sorry I'm italian, I read a guide (in italian) that says the two computer must be connected to the same Internet network, like WiFi. For me a network is what you said but for the author of the guide isn't.
Thank you for your help and your time!