PHP displaying updated values - php

Question

the quantity is an array of items
<td>
<input type="text" size="4" name="qty[<?php echo $pro_id;?>]"style="text-
align:center" value="<?php echo $_SESSION['qty']; ?>">
</td>
<?php
the update function works perfectly
if(isset($_POST['update'])) {
$ip=getIp();
$sql = "UPDATE cart SET qty=? where p_id=? and ip_add=?";
$stmt = mysqli_prepare($con, $sql);
foreach ($_POST['qty'] as $pro_id=>$qty) {
$stmt->bind_param("iis", $qty, $pro_id, $ip);
$stmt->execute();
}
}
this is what i used to display the new quantity, but the values are displayed in the incorrect product field
$sql = $con->query("select * from cart where p_id='$pro_id'");
$row=$sql->fetch_array(MYSQLI_BOTH);
$_SESSION['qty']=$row['qty'];
?>
the button which updates the cart
<td><input type="submit" name="update" value="Update quantity"></td>
<td><button style="height:20px;width:128px">
Continue Shopping</button></td>
<td><button>Checkout</button>
</td>
</table>

Answer 1

When the quantity is a array and the data in the database is correct you need the SESSION qty as a Array!
Try this:
$sql = $con->query("select * from cart where p_id='$pro_id'");
$row=$sql->fetch_array(MYSQLI_BOTH);
$_SESSION[$pro_id]['qty']=$row['qty'];
and this
<td>
<input type="text" size="4" name="qty[<?php echo $pro_id;?>]"style="text-
align:center" value="<?php echo $_SESSION[$pro_id]['qty']; ?>">
</td>
<?php