People say that PHP is better than ASP.NET; it isnt really from a business's perspective - maybe from a Web Designers view it is.

Generally a business uses Microsoft OS's and there are many advantages to ASP.NET when using a Microsoft OS. Such as Active Directory, so on and so forth.

So, it depends what you want to do with ASP? If your looking to just play around with some websites and some programming language, choose PHP, it's much easier...