Simple Url Spinner for PHP/JS

I have a simple variable : var x = "Hello user, if you want to see the video go to this URL $url"; I want someone to code me a simple URL spinner so that I replace the $url variable with the URL spinner defined in a text file or in the same file as the x variable above. Example : $url = [login to view URL] [login to view URL] The $url can be randomly chosen. I need this ASAP