Scripterous is a great way to try some examples in real life without having a web server or creating it locally on your computer. I think this service is very useful to people who are making their first steps into PHP. So if you have problems with buying some hosting plan or creating a local server on your computer and if you want just to try some simple PHP code, you should consider Scripterous as your primary simulator on the Internet.
Just write your code and run it! That’s about it.