How to protect web script from being illegally distributed?
I am going to develop a Vcard/CV Resume in PHP for a person. I want it to be domain restricted. I mean he should not be able to redistribute it to others after buying from me. It should only run on specific domain.
I know that it is difficulties in these days. Precautions can be made.
What are the ways to ensure that this do not happens. Link to resource, Any Suggestion?