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Full Version: [HELP]How can I secure my plugin so only paying users can use it?
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I'm make some (wordpress) plugins and I'm planning to have a license fee for whoever want's to use it.

Therefor I need a way to make sure that this plugin is not uploaded to a server where anyone can download it and use it for free.

So I was thinking of using an API key. Valid API key = user can use the plugin. Invalid = plugin does not work.

I also know that since it's PHP, anyone can go into the code and disable API check (I'm just guessing)

I have API System for generate license key
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