July 2nd, 2004, 04:48 PM
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Registered User
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Join Date: Jun 2004
Location: Portsmouth, UK
Posts: 4
Time spent in forums: < 1 sec
Reputation Power: 0
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Shopping cart error - doesnt update
Hi,
I'm still having problems with the shopping cart - have now got the products to work but am having problems with the shopping cart. Basically when I add items, it doesnt update the shopping cart. I've checked through the boards here & have tried a few things but nothing seems to work.
Here is my cart.php code:
PHP Code:
<html>
<head>
<title> Your Shopping Cart </title>
<script language="JavaScript">
function UpdateQty(item)
{
itemId = item.name;
newQty = item.options[item.selectedIndex].text;
document.location.href = 'cart.php?action=update_item&id='+itemId+'&qty='+newQty;
}
</script>
</head>
<body bgcolor="#FFFFCC">
<?php
include("db.php");
switch($_HTTP_GET_VARS["action"])
{
case "add_item":
{
AddItem($_HTTP_GET_VARS["id"],$_HTTP_GET_VARS["qty"]);
ShowCart();
break;
}
case "update_item":
{
UpdateItem($_HTTP_GET_VARS["id"], $_HTTP_GET_VARS["qty"]);
ShowCart();
break;
}
case "remove_item":
{
RemoveItem($_HTTP_GET_VARS["id"]);
ShowCart();
break;
}
default:
{
ShowCart();
}
}
function AddItem($itemId, $qty)
{
// Will check whether or not this item
// already exists in the cart table.
// If it does, the UpdateItem function
// will be called instead
global $dbServer, $dbUser, $dbPass, $dbName;
// Get a connection to the database
$cxn = @ConnectToDb($dbServer, $dbUser, $dbPass, $dbName);
// Check if this item already exists in the users cart table
$result = mysql_query("select count(*) from cart where cookieId = '" . GetCartId() . "' and itemId = $itemId");
$row = mysql_fetch_row($result);
$numRows = $row[0];
if($numRows == 0)
{
// This item doesn't exist in the users cart,
// we will add it with an insert query
@mysql_query("insert into cart(cookieId, itemId, qty) values('" . GetCartId() . "', $itemId, $qty)");
}
else
{
// This item already exists in the users cart,
// we will update it instead
UpdateItem($itemId, $qty);
}
}
function UpdateItem($itemId, $qty)
{
// Updates the quantity of an item in the users cart.
// If the qutnaity is zero, then RemoveItem will be
// called instead
global $dbServer, $dbUser, $dbPass, $dbName;
// Get a connection to the database
$cxn = @ConnectToDb($dbServer, $dbUser, $dbPass, $dbName);
if($qty == 0)
{
// Remove the item from the users cart
RemoveItem($itemId);
}
else
{
mysql_query("update cart set qty = $qty where cookieId = '" . GetCartId() . "' and itemId = $itemId");
}
}
function RemoveItem($itemId)
{
// Uses an SQL delete statement to remove an item from
// the users cart
global $dbServer, $dbUser, $dbPass, $dbName;
// Get a connection to the database
$cxn = @ConnectToDb($dbServer, $dbUser, $dbPass, $dbName);
mysql_query("delete from cart where cookieId = '" . GetCartId() . "' and itemId = $itemId");
}
function ShowCart()
{
// Gets each item from the cart table and display them in
// a tabulated format, as well as a final total for the cart
global $dbServer, $dbUser, $dbPass, $dbName;
// Get a connection to the database
$cxn = @ConnectToDb($dbServer, $dbUser, $dbPass, $dbName);
$totalCost = 0;
$result = mysql_query("select * from cart inner join items on cart.itemId = items.itemId where cart.cookieId = '" . GetCartId() . "' order by items.itemName asc");
?>
<h1><font face="Monotype Corsiva">Your Shopping Cart</font></h1>
<form name="frmCart" method="get">
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr>
<td width="15%" height="25" bgcolor="#800000">
<font face="monotype corsiva" size="3" color="#FFFFFF">
<b>Qty</b>
</font>
</td>
<td width="55%" height="25" bgcolor="#800000">
<b>
<font face="monotype corsiva" size="3" color="#FFFFFF">
Product
</font>
</b>
</td>
<td width="20%" height="25" bgcolor="#800000">
<b>
<font face="monotype corsiva" size="3" color="#FFFFFF">
Price Each
</font>
</b>
</td>
<td width="10%" height="25" bgcolor="#800000">
<b>
<font face="monotype corsiva" size="3" color="#FFFFFF">
Remove?
</font>
</b>
</td>
</tr>
<?php
while($row = mysql_fetch_array($result))
{
// Increment the total cost of all items
$totalCost += ($row["qty"] * $row["itemPrice"]);
?>
<tr>
<td width="15%" height="25">
<font face="monotype corsiva" size="3" color="maroon">
<select name="<?php echo $row["itemId"]; ?>" onChange="UpdateQty(this)">
<?php
for($i = 1; $i <= 20; $i++)
{
echo "<option ";
if($row["qty"] == $i)
{
echo " SELECTED ";
}
echo ">" . $i . "</option>";
}
?>
</select>
</font>
</td>
<td width="55%" height="25">
<font face="monotype corsiva" size="3" color="maroon">
<?php echo $row["itemName"]; ?>
</font>
</td>
<td width="20%" height="25">
<font face="monotype corsiva" size="3" color="maroon">
£<?php echo number_format($row["itemPrice"], 2, ".", ","); ?>
</font>
</td>
<td width="10%" height="25">
<font face="monotype corsiva" size="3" color="maroon">
<a href="cart.php?action=remove_item&id=<?php echo $row["itemId"]; ?>">Remove</a>
</font>
</td>
</tr>
<?php
}
// Display the total
?>
<tr>
<td width="100%" colspan="4">
<hr size="1" color="#800000" NOSHADE>
</td>
</tr>
<tr>
<td width="70%" colspan="2">
<font face="monotype corsiva" size="3" color="maroon">
<a href="products.php"><< Keep Shopping</a>
</font>
</td>
<td width="30%" colspan="2">
<font face="monotype corsiva" size="3" color="maroon">
<b>Total: £<?php echo number_format($totalCost, 2, ".", ","); ?></b>
</font>
</td>
</tr>
</table>
</form>
<?php
}
?>
</body>
</html>
I'm new to php so not really sure what I'm doing. Any help really appreciated,
Thanks
Jude
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