Well actually the php codes are mostly codes from WordPress codex documentation that i have studied and written then modified to suit my theme's purposes. I have also used wp_query in my theme. Nothing like special coding.
Now i hope you have got a much clearer view of my theme coding.
So can they(the buyers) change my codes and make it their own in their themes? Because i read on themeforest in an article that buyers could buy a theme and use the php codes in it in their own themes (IF AND ONLY IF) they modified it.
I apologise if i am not that clear but i am a newbie on themeforest. i know how to create WP themes. So i decided to invest my time in WP themes that i could sell.
Thanks for your time and response.