...You can get good performance by using an appropriate application design (that is not massively overengineered) and still retain the flexibility of keeping everything in PHP. A URI is dispatched by calling the dispatch() method of the created dispatcher. This method accepts the HTTP method and a URI. Getting those two bits of information (and normalizing them appropriately) is your job.
UCAS or Universal Central Admin System.Client to Server API system for administrating Unix/Linux/BSD systems that allows a quick and effective method for keeping control of all your servers in one central system.