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Finally, after a few weeks working all-nighters (I have a day job) my website written in PHP is finished. It's a niche website with an admin section and it's very easy to use for building your own niche website. My intention was to sell the script and hey, I already sold one copy but what do I see ... this ass.ipe is selling my script. How can I prevent my script from being copied? I can think of some ways to make it more difficult to prevent illegal copies but how do I prevent an illegal installation from my script? Please help ...
I'd stop them from selling it and then modify the code & protect it so you can then sell it safely (or as safely as possible).
What do your terms state? I'd try to retrieve the situation if you can before worrying about more sales.
Note: decoder will have to be installed on target server in order to run encoded scripts. Decoders are usually free.