How to prevent our site from visitor access via domain masking or url masking

Question

Example real site http://stackoverflow.com/

URL Masking http://masking.com/stackoverflow

Question

How to switch the URL masking http://masking.com/stackoverflow to original URL http://stackoverflow.com/

Let me know how can be done in PHP or JavaScript

Answer 1

Masking site urls are done with frames. All you need to do is add a frame-breaking script.

Just add this in your header:

<script type="text/javascript">
if (parent.frames.length > 0) {
parent.location.href = self.document.location
}
</script>