Shopping Cart no values - php

Question

https://kopy.io/6Ud9J https://kopy.io/7tFRb
In first code I have view_cart.php but it doesn't show me the values.
Viewcart.php
<form method="post" action="cart_update.php">
<table width="100%" cellpadding="6" cellspacing="0"><thead><tr><th>Quantity</th><th>Name</th><th>pret</th><th>Total</th><th>Remove</th></tr></thead>
<tbody>
<?php
if(isset($_SESSION['prodcos'])) //check session var
{
$total = 0; //set initial total value
$b = 0; //var for zebra stripe table
foreach ($_SESSION['prodcos'] as $cart_itm)
{
var_dump($cart_itm);
//set variables to use in content below
$titlu = $cart_itm['titlu'];
$cantitate = $cart_itm['cantitate'];
$pret = $cart_itm['pret'];
$id = $cart_itm['id'];
$subtotal = ($pret * $cantitate); //calculate pret x Qty
var_dump($titlu);
var_dump($pret);
var_dump($titlu);
echo '<tr>';
echo '<td><input type="text" size="2" maxlength="2" name="cantitate['.$id.']" value="'.$cantitate.'" /></td>';
echo '<td>'.$titlu.'</td>';
echo '<td>'.$pret.$currency.'</td>';
echo '<td>'.$currency.$subtotal.'</td>';
echo '<td><input type="checkbox" name="remove_code[]" value="'.$id.'" /></td>';
echo '</tr>';
$total = ($total + $subtotal); //add subtotal to total var
}
$grand_total = $total + $shipping_cost; //grand total including shipping cost
foreach($taxes as $key => $value){ //list and calculate all taxes in array
$tax_amount = round($total * ($value / 100));
$tax_item[$key] = $tax_amount;
$grand_total = $grand_total + $tax_amount; //add tax val to grand total
}
$list_tax = '';
foreach($tax_item as $key => $value){ //List all taxes
$list_tax .= $key. ' : '. $currency. sprintf("%01.2f", $value).'<br />';
}
$shipping_cost = ($shipping_cost)?'Shipping Cost : '.$currency. sprintf("%01.2f", $shipping_cost).'<br />':'';
}
?>
<tr><td colspan="5"><span style="float:right;text-align: right;"><?php echo $shipping_cost. $list_tax; ?>Amount Payable : <?php echo sprintf("%01.2f", $grand_total);?></span></td></tr>
<tr><td colspan="5">Add More Items<button type="submit">Update</button></td></tr>
</tbody>
</table>
<input type="hidden" name="return_url" value="<?php
$current_url = urlencode($url="http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
echo $current_url; ?>" />
</form>
update_cart.php
<?php
session_start();
include_once("includes/config.php");
//add product to session or create new one
if(isset($_POST['type']) && $_POST['type']=='add' && $_POST['cantitate']>0)
{
foreach($_POST as $key => $value){ //add all post vars to new_product array
$new_product[$key] = filter_var($value, FILTER_SANITIZE_STRING);
}
//remove unecessary vars
unset($new_product['type']);
unset($new_product['return_url']);
$id = $_POST['id'];
$sth = $db->prepare("SELECT titlu, pret FROM produse WHERE id = :id");
$sth->bindParam(':id', $id);
$sth->execute();
// $statement = $db->query('SELECT titlu, pret FROM produse WHERE id="$id"');
while($sth->fetch(PDO::FETCH_ASSOC)){
//fetch product name, pret from db and add to new_product array
$new_product['titlu'] = $titlu;
$new_product['pret'] = $pret;
if(isset($_SESSION['prodcos'])){ //if session var already exist
if(isset($_SESSION['prodcos'][$new_product['id']])) //check item exist in products array
{
unset($_SESSION['prodcos'][$new_product['id']]); //unset old array item
}
}
$_SESSION['prodcos'][$new_product['id']] = $new_product; //update or create product session with new item
}
}
//update or remove items
if(isset($_POST['cantitate']) || isset($_POST['remove_code']))
{
//update item quantity in product session
if(isset($_POST['cantitate']) && is_array($_POST['cantitate'])){
foreach($_POST['cantitate'] as $key => $value){
if(is_numeric($value)){
$_SESSION['prodcos'][$key]['cantitate'] = $value;
}
}
}
//remove an item from product session
if(isset($_POST['remove_code']) && is_array($_POST['remove_code'])){
foreach($_POST['remove_code'] as $key){
unset($_SESSION['prodcos'][$key]);
}
}
}
//back to return url
$return_url = (isset($_POST['return_url']))?urldecode($_POST['return_url']):''; //return url
header('Location:'.$return_url);
?>
When I ADD the product, in shopping cart, it doesn't show the details..