Can you be more detailed on what you want to do?
Are the variables coming from a form? If so, then $_POST will work fine. If you need to, you can create 'hidden' form items to pass information (look up HTML Forms Hidden).
If not, you probably want to look at using $_SESSION (look up PHP Session) to load your variables on one page and access them on another.
I am kind of new to PHP, so there may be something called a background POST, but I haven't run into it.