Small question regarding caching

[eluser]TheFuzzy0ne[/eluser]
I know that dynamically generated pages can be cached, but to my knowledge, those pages must become static. I'm not sure if it would work if you had to display say a username in the header of your page. From what I understand, if you cache a page that generates differently for each user, every user will get the same page (i.e the same username showing). I'd be interested to know if it does work, though.

I'd suggest you make your own caching function. You can simply store the serialized array in a file; load it and unserialize if when you need it.