Will try to explain this to the best of my abilities. Here is what I want to do. I have a landing page we will calling it landingpage.com I send someone an email that tells them to go to linkshortner.com which redirects them to my site landingpage.com. If they come to my page via this linkshortner I want to redirect them to the offer immediately. However if they just type in my landingpage.com into their browser and go there directly I want them to stay at the page without being redirected to the offer. Does anyone know the php code for this? It would help me tremendously.