Hi,
im trying to learn php, i followed a tutorial on the internet to build a shopping cart that uses a cookie to remember cart contents. The problem i have is i can set a cookie but none of my other functions are working, looking fro advice on what maybe wrong, thanks
<?php
session_start();
if(isset($_GET['action']))
{
$func = $_GET['action'];
}
mysql_connect("localhost", "root", "p104728");
mysql_select_db("p104728");
function GetCartId()
{
// This function will generate an encrypted string and
// will set it as a cookie using set_cookie. This will
// also be used as the cookieId field in the cart table
if(isset($_COOKIE["cartId"]))
{
return $_COOKIE["cartId"];
}
else
{
// There is no cookie set. We will set the cookie
// and return the value of the users session ID
setcookie("cartId", session_id(), time() + ((3600 * 24) * 30));
return session_id();
}
switch($func)
{
case "add":
{
AddItem($_GET['id'], $_GET['qty']);
ShowCart();
break;
}
case "update":
{
UpdateItem($_GET['id'], $_GET['qty']);
ShowCart();
break;
}
case "remove":
{
RemoveItem($_GET['id']);
ShowCart();
break;
}
default:
{
ShowCart();
}
}
function AddItem($itemId, $qty)
{
$result = mysql_query("SELECT COUNT(*) from cart WHERE cookieID ='".GetCartId()."' AND itemID = $itemId");
echo $result;
$row = mysql_fetch_row($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, quantity) 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)
{
mysql_query("update cart set quantity = $qty where cookieID = '" .GetCartId(). "' and itemID = $itemId");
}
function RemoveItem($itemId)
{
mysql_query("delete from cart where cookieID = '".GetCartId()."'and itemId = $itemId");
}
?>
<?php
function ShowCart()
{
$result = mysql_query("select * from cart inner join products on cart.itemID = products.ID where cart.cookieID = '".GetCartId()."'");
while($row = mysql_fetch_array($result))
{
// Increment the total cost of all items
$totalCost += ($row['quantity'] * $row['price']);
?>
<tr>
<td width="15%" height="25">
<font face="verdana" size="1" color="black">
<select name="<?php echo $row['itemID']; ?>" onChange= "UpdateQty(this)">
<?php
for($i = 1; $i <= 20; $i++)
{
echo "<option ";
if($row['quantity'] == $i)
{
echo " SELECTED ";
}
echo ">" . $i . "</option>";
}
?>
</select>
</font>
</td>
<td width="55%" height="25">
<font face="verdana" size="1" color="black">
<?php echo $row['name']; ?>
</font>
</td>
<td width="20%" height="25">
<font face="verdana" size="1" color="black">
£<?php echo number_format($row['price'], 2, ".", ",");?>
</font>
</td>
<td width="10%" height="25">
<font face="verdana" size="1" color="black">
<a href="cart.php?action=remove&id=<?php echo $row['itemID']; ?>">Remove</a>
</font>
</td>
</tr>
<?php
}
?>
<tr>
<td width="100%" colspan="4">
</td>
</tr>
<tr>
<td width="70%" colspan="2">
<font face="verdana" size="1" color="black">
<a href="products.php"><< Keep Shopping</a>
</font>
</td>
<td width="30%" colspan="2">
<font face="verdana" size="2" color="black">
<b>Total: £<?php echo number_format($totalCost, 2, ".", ","); ?></b>
</font>
</td>
<?php
}
}
}
?>
</tr>
</table>
<script language="javascript">
function UpdateQty(item)
{
itemID = item.name;
newQty = item.options[item.selectedIndex].text;
document.location.href = 'cart.php?action=update&id='+itemId+'&qty='+newQty;
}
</script>