Simple PHP Cookies Code Troubleshoot

I am an asp coder not a php coder and this is a baffling problem for me. if you type/click this url: [login to view URL] You will get to my page and in the top there is an error message: Warning: Cannot modify header information - headers already sent by (output started at /home/assistab/public_html/[login to view URL]) in /home/assistab/public_html/includes/[login to view URL] on line 5 This is the contents of the [login to view URL] file. What I am trying to do is to set a cookie based on the id value in the url using $_GET['id'] Therefore what I need you to do is to tell me: 1) how to fix the error so that a cookie gets set 2) add in some extra code so that if there is no id or promo code passed to the page then a default cookie gets set. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform PHP