When I click on Add to cart
hyperlink, cart.php page is not responding (it's not echoing the add variable. Hyperlink looks fine. However, there is something wrong in cart.php. Any response is appreciated. Thanks in advance.
<html>
<head>
</head>
<body>
<table>
<tr>
<td><?php echo $row['ISBN']; ?></td>
<td><?php echo $row['name']; ?></td>
<td><?php echo $row['title']; ?></td>
<td><?php echo $row['year']; ?></td>
<td><?php echo $row['price']; ?></td>
<td><?php echo $row['publisher']; ?></td>
<td> <a href="cart.php?add=abc">Add to cart</a></td>
<td><?php echo $row['ISBN']; ?></td>
</tr>
</table>
</body>
</html>
cart.php page:
<?php
//
session_start();
$page = 'search.php';
$lpage = 'cart.php';
$db = new mysqli('localhost', 'root', '', 'cheapbook') or die('Error connecting to MySQL server.');
mysqli_set_charset($db, 'utf8');
if (isset($_GET['add'])) {
echo $_GET['add'];
$pieces = explode(":", $_GET['add']);
$quantity = mysqli_query('SELECT ISBN, title from book WHERE ISBN=$pieces[0]');
$result = mysqli_query($db, $quantity);
while ($quantity_row = mysqli_fetch_array($result)) {
if ($quantity_row['quantity'] != $_SESSION['cart_' . $_GET['add']]) {
$_SESSION['cart_' . $_GET['add']] += 1;
}
}
if ($pieces[1] == 'SearchByBookTitle') {
header('location:' . $page . 'SearchByBookTitle=' . $pieces[2]);
}
if ($pieces[1] == 'SearchByAuthor') {
header('location:' . $page . 'SearchByAuthor=' . $pieces[2]);
echo $pieces[1];
} else {
header('location:' . $lpage);
}
}
if (isset($_GET['remove'])) {
$_SESSION['cart_' . $_GET['remove']]--;
header('location:' . $page);
}
if (isset($_GET['delete'])) {
$_SESSION['cart_' . $_GET['remove']]--;
header('location:' . $page);
}
if (isset($_GET['cart'])) {
cart();
}
function cart()
{
foreach ($_SESSION as $name => $value) {
if ($value > 0) {
if (substr($name, 0, 5) == 'curt_') {
$total = 0;
$id = substr($name, 5, (strlen($name) - 5));
$get = mysql_query("SELECT ISBN, title, price FROM book where id='.$id.'");
$result = mysqli_query($db, $get);
while ($get_row = mysqli_fetch_array($result)) {
$sub = $get_row['price'] * $value;
echo $get_row['title'] . 'X' . $value . '@Dollar' . $get_row['price'] . '=' . $sub . '<a href="cart.php?remove=.$id.">[-]</a><a href="cart.php?add=.$id.">[+]</a><a href="cart.php?delete=.$id.">[Delete]</a>';
}
$total += $sub;
}
}
if ($total == 0) {
echo "Your cart is empty";
} else {
echo "Paypal button";
}
}
}
?>