Problem with shopcart code
Posted on
16th Feb 2014 07:03 pm by
admin
Hello, I am having a bit of trouble being able to add a product to my shopcart. My mysql database is setup correctly with the tables (User, ShopCart, ShopCartLine, Product, Order, OrderLine, etc.).
Right now I am using mode to pass the item number (productID) to the shopcart. In my switch statement i am essentially getting that item number through the variable $action. The problem is my query doesn't work. Another problem is, I am not really sure of the correct way to setup session variables to be equal to the shopcartID in the shopcart table. More specifically, I'm not exactly sure how I can use the session_id() function to implement this. I currently hard coded a userid (from the user table) instead of passing the value through session. That is another issue which I am not concerned with at the moment. I just want to get this shopcart working in a reasonable fashion.
Can somebody give me an idea of what I am doing wrong and or what I need to do to make this work properly? I am really starting to get lost. By the way, I do plan on adding cases to the switch statement for update and delete. Thanks in advance everyone! Here is the code:
Code: <?php include 'db-inc.php'; ?>
<?php include 'header.php'; ?>
<!-- <html>
<head>
<title>Shopping Cart Contents:</title>
<style type="text/css">
th { background-color: #999;}
.odd_row { background-color: #EEE; }
.even_row { background-color: #FFF; }
</style>
<head>
<body>
<h1> Ecommerce Multimedia Store </h1>
-->
<?php
$action = $_GET['mode'];
$ProductID = $_GET['itemno'];
$session = session_id();
$UserID = 1;
//connect to mysql
$db = mysql_connect(MYSQL_HOST, MYSQL_USER, MYSQL_PASSWORD) or
die ('Unable to connect. Check your connection parameters.');
//select database
mysql_select_db(MYSQL_DB) or die(mysql_error($db));
switch ($action) {
case 'add' :
if (!empty($ProductID)) {
$query = 'INSERT INTO ShopCart( UserID )VALUES( $UserID )';
mysql_query($query, $db) or die(mysql_error($db));
$query = ' SELECT ShopCartID FROM ShopCart WHERE UserID = $UserID ORDER BY ShopCartID DESC LIMIT 1'
$query = 'INSERT INTO ShopCartLine(ShopCartID, ProductID, Quantity)VALUES(" . $ShopcartID . '", "' . $ProductID. '", "', "' . $Quantity . '")';
mysql_query($query, $db) or die(mysql_error($db));
}
break;
}
$query = 'SELECT Product.ProductID, Quantity, Title, ListPrice
FROM ShopCartLine JOIN Product ON ShopCartLine.ProductID = Product.ProductID
JOIN ShopCart ON ShopCartLine.ShopCartID=ShopCart.ShopCartID
WHERE ShopCart.ShopCartID = "' . $session . '"
ORDER BY Product.ProductID ASC';
$result = mysql_query($query, $db) or die (mysql_error($db));
$rows = mysql_num_rows($result);
if ($rows == 1) {
echo '<p>You currently have 1 product in your cart.</p>';
} else {
echo '<p>You currently have ' . $rows . ' products in your cart.</p>';
}
if ($rows > 0) {
?>
<table style="width: 75%;">
<tr>
<th style="width: 100px;"> </th><th>Item Name</th><th><Quantity</th>
<th>Price Each</th><th>Extended Price</th>
</tr>
<?php
$total = 0;
$odd = true;
while ($row = mysql_fetch_array($result)) {
echo ($odd == true) ? '<tr class="odd_row">' : '<tr class="even_row">';
$odd = !$odd;
extract($row);
?>
<td><a href="shopcart.php?ProductID=<?php echo $ProductID;?>"><?php
echo $Title; ?></a></td>
<td>
<form method="post" action="shopcartupdate.php">
<div>
<input type="text" name="Quantity" maxlength="2" size="2"
value="<?php echo $Quantity; ?>"/>
<input type="hidden" name="ProductID"
value="<?php echo $ProductID; ?>"/>
<input type="hidden" name="redirect" value="shopcart.php"/>
<input type="submit" name=submit" value="Change Qty"/>
</div>
</form>
</td>
<td style="text-align: right;"> $<?php echo $ListPrice; ?></td>
<td style="text-align: right;"> $<?php echo number_format
($ListPrice * $Quantity, 2); ?>
</td>
</tr>
<?php
$total = $total + $ListPrice * $Quantity;
}
?>
</table>
<p> Your total before shipping is:
<strong>$<?php echo number_format($total, 2); ?></strong></p>
<form method="post" action="checkout.php">
<div>
<input type="submit" name="submit" value="Proceed to Checkout"
style="font-weight: bold;"/>
</div>
</form>
<form method="post" action="shopcartupdate.php">
<div>
<input type="hidden" name="redirect" value="index.php"/>
<input type="submit" name="submit" value="Empty Cart" />
</div>
</form>
<?php
}
?>
<hr/>
<p><a href="index.php">< Back to main page</a></p>
</body>
</html>
<?php include 'footer.php'; ?>
No comments posted yet
Your Answer:
Login to answer
334 
20 
Other forums
Attempt to assign property of non-object in...
I'm having issues with the following function in PHP 5...
function getTreeWithChildre
how do i display data on a page from mysql
1 - do i use this code at the top of each of my page i wish to only alow access if there as been a s
Using CSS to format MySQL query
Hi,
If i want to have a news page on my site, which displays all records of a table in descen
Why is my row count 0?
Here's the MySQL query i'm running. It basically pulls data from 2 tables based on some data passed.
MySQL-PHP Query Results Help
Hello all. I'm hoping to be able to get some help in solving a problem with query/rowcount output. I
Unique Visitor Tracking
Hello. Currently, I run a voting site where voters are tracked by their IP address and can only vote
How to load mysql (and other) extensions into PHP
How to load mysql (and other) extensions into PHP PHP Development forum discussing coding practices,
php calculate
this code echoes correctly the sum but the inserted result is 0??
Code: <?php
$TotalNum
Format String help
I have a textbox where a person enters an application number. the application number is 10 characte
How do I get the row number from from an sql table query
Hi all
I have a table that I query and it returns a number of rows.
mysql_num_rows($query)
