FoxServ is still 4. XAMPP is 5.
There are differences - for example you have to use $_POST to catch a variable, whereas with 4 it is automatically available, i.e. if you use "name" in a form in V4 then on the next page $name will be available. With 5 you have to use $_POST to get the variable.
Just uninstall foxserv (dump mysql files first so you can import again) and install XAMPP. Move your files over to the xammp directory. You'll have to code in a few lines here and there. XAMPP install much easier and is better than Foxserv.
I'll run your prac on watever version you used.