rc- A struct that contains both
URL/FORMvariables (unsafe data)
prc- A secondary struct that is private. This structure is only accessible from within your application (safe data)
index(). This means that when you execute an event, you can omit the index if you so desire.
privatefunctions? Private functions are not executable from the outside world, but can be executed internally via a function available to all handlers called
runEvent(), which we will explore later.