Creating a PHP Engine of sorts

As a developer for many years, I have struggeled for a Engine that requires no interaction of a client to server. Allowing an auto involk to load certian scripts at certian times. Like a Ticker of sorts.This would reduce a client-side involked load time with includes. In case im still not very clear on what Im looking for. Think of a script on a server that auto updates your MYSQL data and you never have to goto it or load it. For thoses without their own server who use a hosting company. I have wriiten many Scripts that do vast amounts of datacrunching and processing, user inter-action , and you name it. One thing I have never been able to understand is how to make a script load and just run with-out a client action.

If this is small cheese to you then be kind and inform me of such cheese for i have no clue..