Assistance in registration scripts

Hi I need help in connecting to registry scripts or database sql I've downloaded the xampp software do I need a video link or picture or by any clear explanation
The most important thing to make your registration via the site

You'll need the [Only registered and activated users can see links. Click Here To Register...] drivers to make PHP connect to the SQL Server. The package contains help files that contain some easy-peasy example scripts on how to connect to SQL Server from your PHP script.

I need to explain o: