ASP .NET

ASP and .NET are essentially the same as PHP and MySQL - they allow us to create much more advanced dynamic web applications. We can use them to create anything from small personal websites through to large enterprise class web applications.

The primary difference being ASP and .NET are Microsoft technologies, so they have a centralised support network, where as PHP is open source and maintained and supported by a community who believe in free software. The other factor to consider is that you have to pay for ASP and .NET.