My source code is going to be encrypted, so people will be unable to alter important data. HOWEVER, I intend to implement plugins/hooks similar to WordPress/vBulletin... This seems like an open door for someone to just change all my variables - such as various limitations based on their license. Is there ANY way I could at least help guard against this sort of violation of my software?
you can use various encryption tools available.but i agree with srinet.why dont you keep them open source and let others share the best thing of you. at the end there will be nothing remained encrypted