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<?php session_start(); ?>
    <?php
    //check if the user is logged in
    if (isset($_SESSION['validuser'])) {
          echo 'already a member';
          //catch this first - before user spends time filling out the 12 fields!
          //send to message page saying "you cannot register - you are already a member and     logged in"
          //WORKING PERFECTLY - CONFIRMS FORM POSTING TO SAME PAGE CORRECTLY!
          //time for other checks....
    }
    elseif (isset($_POST['submit'])) {
          echo 'new user posted';
          //if there is no logged in user and form has been submitted, start checking the fields to see if any fields are empty
          //collect all errors in array and display?
          //direct back to the form with appropriate messages, form fields retained
          //exit here? or no?
          //focus  now has to pass to the form again - need any code for this? or will it happen automatically?
    }

    ?>
    <html>
       <body>
        <form action="?" method = "POST">
            <!--  12 fields to be filled out by user     -->
            <input type = "submit" name = "submit" value = "submit" />
        </form>
        </body>
    </html>