Lock and encrypt a source code


I want to lock and secure my source code from being copied and modified.

I want to deliver the project to the clients but I don’t want that they steal my source code.

Maybe an encryption on php files will be great.

Can anybody, help me on how to lock and encrypt the source code?

Also, please if there is an algorithm or something that lock the functionality of the code after a period of time.

I will be happy to know about it.




I think Zend Guard (commercial product) should do what you want. But never tried it though.