Paypal shopping cart Error Detected

I've created my shopping cart which works perfectly for adding multiple items. This will then loop over each item and display the image, name, quantity and total price.

I have added a paypal button and am trying to get this to work but I'm not sure why it isn't picking anything up. I always get 'Error Detected, nothing in shopping cart'.

I also print out my variables to ensure they are correct which they are, but still looks like it's not getting picked up in the form.

<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="upload" value="1">
<input type="hidden" name="business" value="[email protected]">

for ($i = 0; $i < count($cart); $i++) {
         $s += $cart[$i]->price * $cart[$i]->quantity;
         $ppName = $cart[$i]->name;
         $ppAmount = $cart[$i]->price * $cart[$i]->quantity;
         $ppQuantity = $cart[$i]->quantity;
         // Inside of for each loop 
         ?>  
         <input type="hidden" name="item_name_<?php echo $x; ?>" value="<?php echo $ppName; ?>">
         <input type="hidden" name="amount_<?php echo $x; ?>" value="<?php echo $ppAmount; ?>">
         <input type="hidden" name="quantity_<?php echo $x; ?>" value="<?php echo $ppQuantity; ?>">
         <tr>
         <td class="col-md-2"><img class="img-responsive" img src= '<?php echo $cart[$i]->image_name; ?>' alt="Oops, Image cannot be found!" height="150" width="150"/></td>
         <td class="col-md-4">Name: <?php echo $cart[$i]->name; ?><br><br> <?php echo $cart[$i]->description; ?></td>
         <td class="col-md-4"> <a href="checkout.php?index=<?php echo $index; ?>" onclick="return confirm('Are you sure?')"><span class="glyphicon glyphicon-minus"></a></span> Qty <?php echo $cart[$i]->quantity; ?> <span class="glyphicon glyphicon-plus"></span></td>
         <td><?php echo $cart[$i]->price * $cart[$i]->quantity; ?></td>         
         </tr>
         <br>
         <?php
         $index++;
         $x = $i + 1;
         ?>

 <input type="hidden" name="currency_code" value="GBP">
 <input type="hidden" name="hosted_button_id" value="2R2BAJEWK3LRU">
 <input type="image" src="https://www.paypalobjects.com/en_GB/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" alt="PayPal – The safer, easier way to pay online.">
 <img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">

I would appreciate any feedback. Many thanks.

Solution

I found the hosted_button_id contained in your button code, once the hotsted button id is contained, all of the extra codes you added are invalid.

Please delete the line of "hosted_button_id" and retry it.