I have a website that provides a hyperlink instead of the actual file for download. I want to encode within this link the ability to have a time expiration, and also a limited use method. I have been trying to find a code that will check the link to make sure it is using the domain on file where this hyperlink is being used. I need it to call back and disable the link of the domain name on file does not match. Is there someone who can help me write a coding snippet that will do this?