createing a php script with reloadable modules.

Ok guys I need your help I'm banging my head against the wall on this one. I need to do something like modules in a script. The main script runs 24/7 I want to be able to change the modules run time. have some kind of flag set to have it update/reload the module. I cant do something like an include with the modules because they wont be refreshed that and you cant re-included a function that has already been include once and include_once wont work either because that wont refresh the module. here are my thoughts. if I use system or pass thru to set off the modules. but the question is I need to pass the module a file pointer. and so far I have been unable to pass a file pointer to another script. another option would be to use fopen to buffer the module and using exec to execute this new module. I could reload the module by re reading the file. would this work? all comments ,opinions , ideas , and wild guesses are welcome. I'm stuck and need some new ideas on how to do this. thanks kill-9 www.kill-9.dk