paypal get multiple item_number - php

Question

I have created a paypal cart form which add multiple product for payment:
<?php
$i=1;
foreach($p_result as $prod):
?>
<div class="image">
<img src="images/<?php $result = $SimpleUsers->prod($prod['pid']); foreach($result as $row):echo $row['product_img'];?>" alt="" width="97px" height="110px"/>
</div>
<div class="name">
<?php echo $row['product'].' -- ';echo $prod['month']." mesi";?>
</div>
<div class="price">
<?php echo "N. licenze:".$prod['quantity'];?>
</div>
<div class="price">
Price: <?php echo $row['price']*$prod['month']*$prod['quantity'];?>0€
</div>
<div class="btn">
<form action='<?php echo $paypal_url; ?>' method='post' name='cart'>
<input type='hidden' name='business' value='<?php echo $paypal_id;?>'>
<input type='hidden' name='cmd' value='_cart'>
<input type="hidden" name="upload" value="1">
<input type="hidden" name="quantity_<?php echo $i; ?>" value="<?php echo $prod['quantity']; ?>">
<input type='hidden' name='item_name_<?php echo $i; ?>' value='<?php echo $row['product'];?>'>
<input type='hidden' name='item_number_<?php echo $i; ?>' value='<?php echo $prod['pid'];?>'>
<input type='hidden' name='amount_<?php echo $i; ?>' value='<?php echo $row['price']*$prod['month'];endforeach; ?>'>
<?php $i++; ?>
<input type='hidden' name='no_shipping' value='1'>
<input type='hidden' name='currency_code' value='EUR'>
<input type='hidden' name='handling' value='0'>
<input type='hidden' name='cancel_return' value='http://www.example.com/paypal/cancel.php'>
<input type='hidden' name='return' value='http://www.example.com/paypal/success.php'>
<?php
endforeach;
?>
But on success.php page, I get all the variables, except item_number which is void
Success.php(part where I get variables)
$uid = $_SESSION['uid'];
$username=$_SESSION['username'];
$item_no = $_GET['item_number'];
$item_transaction = $_GET['tx'];
$item_price = $_GET['amt'];
$item_currency = $_GET['cc'];
How I can get item_number variable?

Answer 1

You have to use the array in input name to get the multiple values
<input type='hidden' name='item_number[]' value='<?php echo $prod['pid'];?>'>
You can get the values using
print_r($_GET['item_number']) //You will get a array of item number

Answer 2

Well when you're naming it in the form you're usinh
'item_number_<?php echo $i; ?>' (which can look like "item_number_3")
but when you try to call it your using $_GET['item_number']
you would have to call $_GET['item_number_2'] with the way you're naming it.
Hope that shed some light on it, for you.
edit ++++++++++++++++++++++++++++
If I were you I would change
<input type='hidden' name='item_number_<?php echo $i; ?>' value='<?php echo $prod['pid'];?>'>
to
<input type='hidden' name='item_number' value='<?php echo $prod['pid'];?>'>
and you call to $_GET['item_number'] should work fine.