[UPHPU] Website Charts & PHP Obscurity

[Justin Giboney]

I am planning on selling an browser-based piece of software that needs some
charts (line & bar). What would you recommend on using for some charts
software that is great to use, but licensable without making my code open
source.

Also what is the best way to hide the code so that it can't be modified or
copied.

I was going to do some searches on the site (uphpu.org) but it doesn't seem
to be working properly.

Thanks,

Justin