Store and add to session variable

[SJones]

Hello, I am working on a site and I need some guidance please. I have a form that I would like to store two values in a session. All I need is the product and the quantity. Now I get the product from the form fields – size, color, logo, and voltage using a switch/case. And I get the quantity from the form field quantity. I would like to store these values in a session variable and be able to go back and add to, delete, or edit the variable.
My goal is to be able to figure out what products and quantity the client needs. Then send email order to the warehouse for processing. I am having trouble storing the value and adding to it, whenever I go back and use the form the only output I get is the current values. It over writes the old data. If you want to visit what I have now you can see it at (http://www.rediheat.com/feb2008/order.php?f=single_pie) the only form working now is single_pie Any Help?

here is my code:

<?php include 'includes/header.inc';  ?>

<table width="887" border="0" align="center" cellpadding="0" cellspacing="0">
      <tr>
         <td valign="top"><img src="images/spacer.gif" width="880" height="1"></td>
         <td rowspan="2"><img src="images/spacer.gif" width="7" height="466"></td>
      </tr>
      <tr>
      <!-- This is where the ordering form will be placed -->
         <td valign="top" class="product_article" style="background-image:url(images/order_page_bg.jpg); background-repeat:no-repeat; ">
         <div style="padding-left:14px; padding-top:10px; ">
         <!-- This area is where the include files will be  -->

<?php 
            $allowed_inc = array('single_pie', 'multi_pie', 'food_service', 'element');


        if (isset($_POST['single_pie_submit'])) { // THIS IS WHERE THE PRODUCTS WILL BE ADDED TO THE DATABASE
        require_once ('connection/mysql_connect.php'); // Connect to the database.
        $error_message = "";

           if ($size != "blank") {
              $size = $_POST['size'];  
           } else {
              $error_message .= "<p>You forgot to enter a size</p> ";
           }
           if ($color != "blank")  {
              $color = $_POST['color']; 
           } else {
              $error_message .= "<p>You forgot to choose a color!</p> ";
           }
           if ($logo!= "blank") {
              $logo = $_POST['logo']; 
           } else {
              $error_message .= "<p>You need to choose if you would like a logo on your bag </p> ";
           }
           if ($voltage!= "blank") {
              $voltage = $_POST['voltage']; 
           } else {
              $error_message .= "<p>You did not choose the electrical voltage that you require </p>";
           }
           if ($quantity != "") {
              $quantity = $_POST['quantity'];
           } else {
              $error_message .= "<p>You did not select a quantity </p>";
           }

           if (strlen($error_message) > 1) { // IF THERE WAS AN ERROR
              echo $error_message . "<p>Click <a href='javascript:history.back()'>here</a> to go back</p>";
              echo "</div>         
                       </td>
                    </tr>
                 </table>";
              include 'includes/footer.inc';
              exit();
           } else { // WE NEED TO PROCESS THE ORDER NOW
              if ($size && $color && $logo && $voltage && $quantity) { // IF ALL VARIABLES ARE TRUE
              ##############################
              ##      SWITCH / CASE      ###
              ##############################

              $product = $size . $color . $logo . $voltage;
              switch ($product) {
                 case '16redno110';
                    $prod='HP101';
                    break;
                 case '16redno220';
                    $prod='HP105';
                    break;
                 case '16redyes110';
                    $prod='HP103';
                    break;
                 case '16redyes220';
                    $prod='HP108';
                    break;
                 case '16blackno110';
                    $prod='HP113';
                    break;
                 case '16blackno220';
                    $prod='HP115';
                    break;   
                 case '16blackyes110';
                    $prod='HP114';
                    break;
                 case '16blackyes220';
                    $prod='HP116';
                    break;
                 case '16greenno110';
                    $prod='HP119';
                    break;
                 case '16greenyes110';
                    $prod='HP120';
                    break;
                 case '16greenno220';
                    $prod='HP000';
                    break;
                 case '16greenyes220';
                    $prod='HP000';
                    break;

                 case '18redno110';
                    $prod='HP102';
                    break;
                 case '18redno220';
                    $prod='HP106';
                    break;
                 case '18redyes110';
                    $prod='HP104';
                    break;
                 case '18redyes220';
                    $prod='HP109';
                    break;
                 case '18blackno110';
                    $prod='HP112';
                    break;
                 case '18blackno220';
                    $prod='HP117';
                    break;
                 case '18blackyes110';
                    $prod='HP110';
                    break;
                 case '18blackyes220';
                    $prod='HP118';
                    break;

                 case '18greenno110';
                    $prod='HP121';
                    break;
                 case '18greenyes110';
                    $prod='HP122';
                    break;
                 case '18greenno220';
                    $prod='HP000';
                    break;
                 case '18greenyes220';
                    $prod='HP000';
                    break;
                 }
              ##############################
              ##   END OF SWITCH / CASE   ##
              ##############################

              $cart_prod = $prod. "," .$quantity. "-" ;

              session_register('cart_prod');
              echo $cart_prod;                  
              echo "   </div>         
                       </td>
                    </tr>
                 </table>";
              include 'includes/footer.inc';
              exit();
              }
           }
        }

        if (isset($_POST['multi_pie_submit'])) { // THIS IS WHERE THE PRODUCTS WILL BE ADDED TO THE DATABASE
           echo "Multi pie submit button was set
                 </div>         
                    </td>
                 </tr>
              </table>";
           include 'includes/footer.inc';
           exit(); 
        }

        if (isset($_POST['food_service_submit'])) { // THIS IS WHERE THE PRODUCTS WILL BE ADDED TO THE DATABASE
           echo "Food service submit button was set
                 </div>         
                    </td>
                 </tr>
              </table>";
           include 'includes/footer.inc';
           exit();
        }

        if (isset($_POST['element_submit'])) { // THIS IS WHERE THE PRODUCTS WILL BE ADDED TO THE DATABASE
           echo "Element submit button was set
                 </div>         
                    </td>
                 </tr>
              </table>";
           include 'includes/footer.inc';
           exit();
        }

           // page specified -> load content from relevant text file
        if (isset($_GET['f']) and in_array($_GET['f'], $allowed_inc)) {
              include("includes/" . $_GET['f'] . ".inc");

           // no page specified -> load content from default.inc
        } else {
              include("includes/products_default.inc");
        }
     ?>

<!-- This area is the end of the include files -->  
     </div>

     </td>
  </tr>
   </table>

<?php  include 'includes/footer.inc'; ?> 

[djjjozsi]

hello

create session array.

$SESSION["System"][]=$POST[""]; //write here the $POST[] correctly...
$SESSION["Color"][]=$POST[""];
$SESSION["Logo"][]=$POST[""];
$SESSION["Voltage"][]=$POST[""];
$SESSION["Voltage"][]=$POST[""];
$SESSION["Quantity"][]=$_POST[""];

if there is a mistake in the form select, you not add 1 to that $SESSION["holder"].
if evrything is ok, you add 1 to it.
$SESSION["holder"]++;

you could do a list of the selected items, and add an option, to delete one row from that. In that case, you set a $SESSION["deleted"][$SESSION["holder"]] value into 1;

if the user click on, to order the items, you make a final list those array elements, where the deleted is 0.

i think it is enoght for you.

But i prefer the database , to store items as a CART , just add a table, the values you want to store, and a session_id ...

And you easy use the COUNT(Quantity) AS coundOfQuantity ....

hello.