WordPress theme users like me to remove my link from the footer to the coder as not. I really hate them (but not really do not like) when they remove my links and they kind of make theme was created. Yes, being edited by the users to protect PHP file, I have encrypted files so they can not edit the footer file. But, how do I? I use an encoder to encrypt and close the file. Free PHP encoder source code is encrypted and can only be decoded when users request a file from your Internet browser. Although they may request the file but they can not modify it. Even I do not get back the source code again if I can lose the original file. So with this encryption, your link on the footer will be safe. I have discover an online Free PHP encoder fined www.websstudio.com/backlink/php-encoder.html