I've been trying for ages to add a form field qty to an array to pass it to
my shopping cart and have finally managed it but not quite.
Please check this cart:
http://www.violasystems.com/shop_testing/

When you add an item using the form text box it doesn't add more than 1 on
the first submit. However if you go back and then add  further items it's
will add the multiple products to the cart? I have three functions which
control this and can't see where I'm going wrong:

Submitting the form:
    echo "<table width ='760' background='images/shopbg.gif'><form
action='show_cart.php' method='post'><tr><td width='380'>&nbsp;</td>";
   echo "<td width='200' align='right'>";
   echo "<b>Quantity required: </b><input type='text' name='formqty'
value='1' size='3'></td>";
   echo "<td width='180' align='left'>";
   echo "<input type='hidden' name='new' value='$ItemCode'>";
   echo "<input type='image' src='images/add-to-cart.gif' border ='0' alt
='Add to cart'>";
   echo "</td></tr></form></table>";
   echo "<table width='760' background='images/shopbg.gif'><tr><td
width='200'>&nbsp;</td><td><img src='images/lower.gif'></td></tr></table>";

Processing the form:

<?
  include ('products_sc_fns.php');
  // The shopping cart needs sessions, so start one
  session_start();
  if($new)
  {
    //new item selected
    if(!session_is_registered("cart"))
    {
      $cart = array();
      session_register("cart");
      $items = 0;
      session_register("items");
      $total_price = "0.00";
      session_register("total_price");
    }
    $qty = $formqty;
 if($cart[$new])
      //$cart[$new]++;
   $cart[$new] = $cart[$new] + $qty;
    else
      $cart[$new] = 1;
    $total_price = calculate_price($cart);
    $items = calculate_items($cart);
  }


  if($save)
  {
    foreach ($cart as $ItemCode => $qty)
    {
      if($$ItemCode=="0")
        unset($cart[$ItemCode]);
      else
        $cart[$ItemCode] = $$ItemCode;
    }
    $total_price = calculate_price($cart);
    $items = calculate_items($cart);
  }

  do_html_header("Your shopping cart");
  //array de-bug
  //print_r($cart);
  if($cart&&array_count_values($cart))
    display_cart($cart);
  else
  {
    echo "<table width='760' cellpadding='0'
background='images/shopbg.gif'><tr><td width='200'>&nbsp;</td><td>There are
no items in your cart";
    echo "</td></tr></table>";
  }
  $target = "index.php";

  // if we have just added an item to the cart, continue shopping in that
category
  if($new)
  {
    $details =  get_product_details($new);
    if($details["catid"])
      $target = "show_cat.php?catid=".$details["catid"];
  }
  $path = $PHP_SELF;
  $path = str_replace("show_cart.php", "", $path);
  echo "<table width='760' cellpadding='0'
background='images/shopbg.gif'><tr><td width='200'>&nbsp;</td><td
align='left'>";
  display_button($target, "continue-shopping", "Continue Shopping");
  display_button("http://".$SERVER_NAME.$path."checkout.php";,
"go-to-checkout", "Go To Checkout");
  echo "</td></tr></table>";
  do_html_footer();
?>


And displaying the cart:

function display_cart($cart, $change = true, $images = 1)
{
  // display items in shopping cart
  // optionally allow changes (true or false)
  // optionally include images (1 - yes, 0 - no)

  global $items;
  global $total_price;
  echo "<table border = 0 width = 760 cellspacing = 0
background='images/shopbg.gif'>
        <form action = show_cart.php method = post>
        <tr><th width='200'>&nbsp;</th><th colspan = ". (1+$images) ."
bgcolor=\"#146190\"><font face='Verdana,Arial' size='-1'
color='White'>Item</font></th>
        <th bgcolor=\"#146190\"><font face='Verdana,Arial' size='-1'
color='White'>Price</font></th><th bgcolor=\"#146190\"><font
face='Verdana,Arial' size='-1' color='White'>Quantity</font></th>
        <th bgcolor=\"#146190\"><font face='Verdana,Arial' size='-1'
color='White'>Total</font></th></tr>";

  //display each item as a table row
  $qty = $formqty;
  foreach ($cart as $ItemCode => $qty)
  {
 $product = get_product_details($ItemCode);
    echo "<tr><td width='200'>&nbsp;</td>";
    if($images ==true)
    {
      echo "<td align = left>";
      if (file_exists("images/$ItemCode.jpg"))
      {
         $size = GetImageSize("images/".$ItemCode.".jpg");
         if($size[0]>0 && $size[1]>0)
         {
           echo "<img src=\"images/".$ItemCode.".jpg\" border=0 ";
           echo "width = ". $size[0]/3 ." height = " .$size[1]/3 . ">";
         }
      }
      else
         echo "&nbsp;";
      echo "</td>";
    }
    echo "<td align = left>";
    echo "<a href =
\"show_products.php?ItemCode=".$ItemCode."\">".$product["ItemName"]."</a>
(Code) ".$product["ItemCode"];
    echo "</td><td align = center> ".number_format($product["price"], 2);
    echo "</td><td align = center>";
    // if we allow changes, quantities are in text boxes
    if ($change == true)
      echo "<input type='text' name='$ItemCode' value='$qty' size='3'>";
    else
      echo $qty;
    echo "</td><td align = center>
".number_format($product["price"]*$qty,2)."</td></tr>\n";
  }
  // display total row
  echo "<tr><th width='200'>&nbsp;</th>
          <th colspan = ". (2+$images) ." bgcolor=\"#146190\">&nbsp;</th>
          <th align = center bgcolor=\"#146190\"><font face='Verdana,Arial'
size='-1' color='White'>
              $items
          </font></th>
          <th align = center bgcolor=\"#146190\"><font face='Verdana,Arial'
size='-1' color='White'>
               ".number_format($total_price, 2).
          "</font></th>
        </tr>";
  // display save change button
  if($change == true)
  {
    echo "<tr><td width='200'>&nbsp;</td>
            <td colspan = ". (2+$images) .">&nbsp;</td>
            <td align = right>
              <input type = hidden name = save value = true>
              <input type = image src = \"images/save-changes.gif\"
                     border = 0 alt = \"Save Changes\">
            </td>
            <td>&nbsp;</td>
        </tr>";
  }
  echo "</form></table>";
}


Any help much appreciated.
rgds
Steve.

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