Well, not quite. If you're just doing a client-side app, Atlas client script is all you need. But if you want to connect to the server, you'll want to write server-side code to talk to the Atlas client. At the MIX conference a couple of weeks ago, I showed how you can use Atlas with PHP. To do this, I wrote some PHP code providing the server end of the Atlas web services stack, including a base class for implementing REST web services, a class for generating Javascript proxies from these services, and a serializer built on the excellent open-source PHP-JSON serializer.
The Atlas framework has two distinct elements - a client script framework, and a set of server extensions that integrate Atlas with ASP.NET. The client script framework is 100% Javascript, and works with any modern browser. But it is also completely server-agnostic, and works with any web server.
The PHP example is available for download and they've included a complete walk-through. The simple illustration they show involves working with a web service to grab a series of words from the server.











