This example shows how to implement a Store using a REST proxy.
Note that the js is not minified so it is readable. See restful.js
Take note of the requests being generated in Firebug as you interact with the Grid.
The Proxy in this example points to a single url app.php/users. You may have to edit your web-server's configuration to allow the php back-end to be executable. app.php implements a simple RESTful backend controller and simulates a database by storing records in the $_SESSION.