Paypal throws empty response while send multiple items - paypal

Question

I am working from last couple of days on same issue. Getting empty response while sending multiple items. But, for single payment, I am getting Array values. Can you please check the below code and let me know any changes required.
Test.php
..............
<?php
$cur_dir='http://'.$_SERVER['SERVER_NAME'] . dirname($_SERVER['REQUEST_URI']);?>
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
<INPUT TYPE="hidden" name="charset" value="utf-8">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="upload" value="1">
<input type="hidden" name="business" value="xxxxxxx#gmail.com">
<input type="hidden" name="currency_code" value="US">
<input type="hidden" name="item_name_1" value="beach ball">
<input type="hidden" name="amount_1" value="15">
<input type="hidden" name="item_name_2" value="towel">
<input type="hidden" name="amount_2" value="20">
<input type="hidden" name="return" value="<?php echo $cur_dir.'/test1.php'; ?>">
<input type="hidden" name="notify_url" value="<?php echo $cur_dir.'/test.php'; ?>">
<input type="image" value="submit" src="images/byunow.jpg" alt="submit Button" >
</fieldset>
</form>
Test1.php returns Empty value
.................
<?php print_r($_POST); ?>

Answer 1

You may want to enable the Payment Data Transfer feature for the seller account - see: https://developer.paypal.com/webapps/developer/docs/classic/products/payment-data-transfer/
you can then take the returned data to establish a secure connection to paypal in order to retrieve payment details.
However, please bear in mind that the buyer won't hit the return URL 100% of the time - so you will want to rely on IPN (See: https://developer.paypal.com/webapps/developer/docs/classic/ipn/gs_IPN/) for processes like updating an order status.
IPNs are sent to the "notify_URL" as soon as a new transaction arrives on the account.