I have a problem. I need to make a php application with manual licensing not using any software for it but I didn't find anywhere a tutorial or a book about this. I have only found some tutorial about different types of licensing but could not find any implementation(I mean in which way I will start my this work) of it . So anybody can help me about this.
I need a complete licensing system for the application so that the user can not run it without my license. The system should ask the user for registration code or something like that while the installation process.The application should not be able to run if the code that takes care of the licensing will be removed.
If you guys can suggest me some books or tutorials that help me with this.