shopping cart always empty

[dunskii]

Hello all,

I'm in the process of creating my first shopping cart. I seem to be able to add a product ok as when I test it I get Array ( [6] => 4 ) displayed. Though when I go to view the cart there are no products listed, and the test only displays Array. I'm guessing that session is ending.

heres my code to view the cart.

<?
if (isset ($_POST['submit'])) {
	foreach ($_POST['qty'] as $key => $value) {
		if (($value == 0) AND (is_numeric ($value))) {
			unset ($_SESSION['cart'][$key]);
		} elseif ( is_numeric ($value) AND ($value > 0) ) {
			$_SESSION['cart'][$key] = $value;
		}
	}
}
$empty = TRUE;
if (isset ($_SESSION['cart'])) {
	foreach ($_SESSION['cart'] as $key => $value) {
		if (isset($value)) {
		}
	}
}

if (!$empty) {
$in = implode(',',$_SESSION['cart']);
$query = 'SELECT * FROM prod_list IN ($in) ORDER BY prod_name ASC';
$result = mysql_query ($query);

echo '<table border="0" align="center">
		<tr>
			<td align="center"><span class="text">Product Name</span></td>
			<td align="center"><span class="text">Price</span></td>
			<td align="center"><span class="text">Qty</span></td>
			<td align="center"><span class="text">Total Price</span></td>
		</tr>
		<form action="view_cart.php" method="post">
		';
			$total = 0;
			while ($row = mysql_fetch_array ($result, MYSQL_ASSOC)) {
				$subtotal = $_SESSION['cart'][$row['prod_id']] * $row['prod_price'];
				$total += $subtotal;

			echo " 
			<tr>
				<td align=\"center\"><span class=\"alt_text\">{$row[prod_name]}</span></td>
				<td align=\"center\"><span class=\"alt_text\">{$row[prod_price]}</span></td>
				<td align=\"center\"><span class=\"alt_text\"><input type=\"text\" size=\"3\" name=\"qty[{$row[prod_id]}]\" value=\"{$_SESSION['cart'][$row['prod_id']]}\" /></span></td>
				<td align=\"center\"><span class=\"alt_text\">$" . number_format ($subtotal, 2) . "</span></td>
			</tr>\n";
		}
		echo ' <tr>
			<td colspan="4" align="right"><span class="text">Total:</span></td>
			<td align="center"><span class="alt_text">$' . number_format ($total, 2) . '</span></td>
		</tr>
		</table><div align="center"><input type="submit" name="submit" value="Update Cart" />
		</form><br /><br /><a href="checkout.php" class="link">Checkout</a></div>';



} else {
	echo '<p class="text">Your cart is empty.</p>';
}	
?>

Thanks for your help,
D

[drew010]

if your output does show "Array" it means you have data but you are trying to echo an array. See this example...

$arr = array("test" => "value", "another" => "entry");

echo $arr;  //cant echo an array, output will just be Array

you can use [man]print_r[/man] to dump the contents of the array and see what it contains.
basically you just need to modify the code to make sure you are echo'ing the proper variable.

[dunskii]

thanks for your help, I forgot to add the _r and it now displays Array ( [6] => 6 ), though the cart is still empty, from what I can see i'm calling the right variables, I guess I'm just going to have to go through it with a fine comb.

[drew010]

from looking at that, not sure if its the top but i notice no session_start() call which has to be done on every page you want to use a session.

[dunskii]

oh yeah i forgot to say the session_start() is in the header