PHP and FDF

I'm trying to create web page based on a PDF Form with the action assigned to a php script to parse out the vars. It seems to be working because I can parse and write the vars to a database but it seems that a file is getting passed back to the client containing the output of the php script that was called. If I write in a header("Location") command and route the client to another page their browser opens a file locally on their computer that contains the source code of the page called. How do I just get the results of the form? TIA, Ed