shopping cart Session php

问题

    <?php

session_start(); 
print '<h1>Your Shopping Cart:</h1>';
print '<h4>The Product ID: '.$_SESSION['id'].' </h4>';
print '<h4>The Quantity: '.$_SESSION['quantity'].' </h4>';

$dbc = mysql_connect('127.0.0.1', 'root', ''); 
mysql_select_db('product', $dbc);

$query = "SELECT * FROM prod WHERE id='".$_SESSION['id']."'";



if ($r = mysql_query($query, $dbc)) {

while ($row = mysql_fetch_array($r)) { 
print "<p><b>Product Name: {$row['name']}<br />
             The Price: {$row['price']}<br />
             Shipping Cost: {$row['shipping']}<br />



 </p><hr />\n";
 }}
?>

This code for shopping cart with Session but the problem is that it keeps only one product.

For example, if you purchase a product A and in Cart product B delete B then add A product Please help me I want to add more than one product and printed on the screen ##

回答1:

Add another level to your cart:

$_SESSION['cart'][$productID]['quantity'];
                 ^^^^^^^^^^^^^

so you keep per-product data. Right now you're using a single level that you're continually overwriting as new products are added.

回答2:

Say hello to php arrays: http://www.php.net/manual/en/book.array.php :)
Basically instead of :

$_SESSION['id'] = 1234;

You will want:

$_SESSION['products'][] = array('id'=>1234, 'quantity'=>10);

Then you will iterate over $_SESSION['products'] like

foreach($_SESSION['products'] AS $product){
   echo $product['id'];
}

回答3:

You should maintain your cart in single session variable $_SESSION['cart']. When adding new products you can use this,

$_SESSION['cart'] = array();         //initialize once
array_push($_SESSION['cart'], array("id" => $id, "quantity" => $q));
print_r($_SESSION['cart']);

This way, you can have multiple products in cart.

For specific framework, CodeIgniter, there's a class which provides cart functionality. Check this out.

回答4:

$_SESSION['cart'] = array();
$_SESSION['cart']['1'] = 2;//add product A,id=1,quality=2
$_SESSION['cart']['2'] = 3;//add product B,id=2,quality=3

//get all items
foreach($_SESSION['cart'] as $item)
{
    print_r($item);
}

来源：https://stackoverflow.com/questions/15979952/shopping-cart-session-php

标签

php

shopping