The place to start would be to determine how to program the server scripting language. Testing should always be done locally first, that is on a production computer and not a live environment. For a very quick (about 2-10 minutes) basic setup I recommend downloading and installing XAMPP. It has a control panel to start/stop Apache and MySQL (not sure how this would fit with your existing database) though you may only need Apache. You'll likely want to revise the website folder here...
Make a backup copy of the default configuration! If your changes are successful after a server restart back that revised copy as well.
...which is listed a few times (DocumentRoot, <Directory , ScriptAlias , <Directory , (last two for CGI, unrelated to what you're doing)).
Restart Apache whenever you make changes to the configuration file.
Once you've got Apache/PHP running using XAMPP you'll want to experiment connecting to the SQL database using PHP.
That should be considered the basic starter approach to your goal.