Firstly, congratulations to you for reviving a 5 year old topic.
Secondly, in order to set up ‘webmin and php’ you’ll need a web server. I recommend downloading XAMPP as it’ll be enough for you to get started. Once it’s downloaded, simply follow the installation process and voila!
Now that you have your own web server, it’s a good idea to understand it (beyond the basic scope). Visit this website and spend some time learning about the possibilities and opportunities at your fingertips.