I have a built a small payments and customer management system, which allows small businesses to keep track of their customers and accept payment from them, via their own website.
I have sold the script to a few different companies now and they are getting great use out of it everyday.
Considering the payments are run on the customer's own website (and not a third party website), i need to set up my system on the client's web server, so essentially they are getting a full copy of the code once i have it set up.
Can anyone advise of a method for adding some copyright procedures to protect my code. It is quite easy for someone to download my script and pass it onto another party, in which they can then install it on several other websites?
I was thinking of linking my script to a file on an external server (my server), so that part of the system was ran from my own server, but i understand that this could also lead to problems, as if my server experienced downtime, then so would all of my clients who are using the system.
Can anyone advise of any other methods? Thanks in advance for your help.