Invoice Display

<head>
<link href="http://admin.ourscorecard.com/css/navbar.css" rel="stylesheet" type="text/css">

</head>

<?php
session_start();
if (!isset($_SESSION['loggedin'])) {
    header('Location: http://admin.ourscorecard.com/index.php');
    exit();
}

?>
<?php

include "config.php";
$owner = $_SESSION['role'];
?>
<?php include "../../assets/navbar.php" ?>
<div>

 <form method='post' action='../finance/export/download.php'>
  <input type='submit' value='Export' name='Export'>

  <table id="invoice_table">
    <tr>
<tr class="invheader">
<th>Reference Number</th>
<th>Memo</th>
<th>Trans. Date</th>
<th>Due Date</th>
<th>Location</th>
<th>PO Number</th>
<th>Item Amount</th>
<th>Pre Order #</th>
<th>Quantity</th>
<th>Vendor</th>
<th>Balance</th>
</tr>
    </tr>
    <?php
     $owner = $_SESSION['role'];
     $query = "SELECT l.AddressCode,
l.owner,
l.City,
l.State,
l.Zip,
i.RefNumber,
i.memo,
i.Txndate,
i.DueDate,
i.ItemCustomerFullName,
i.PO_number ,
i.ItemAmount,
i.PO_number,
i.preorder_,
i.Quantity,
i.Vendor,
i.balance
FROM imw_locations l
INNER JOIN vzw_invoice i
ON l.AddressCode=i.ItemCustomerFullName
WHERE l.owner='" . $owner . "'
";
     $result = mysqli_query($con,$query);
     $user_arr = array();
     while($row = mysqli_fetch_array($result)){
      $ref = $row['RefNumber'];
      $memo = $row['memo'];
      $Txndate = $row['Txndate'];
      $duedate = $row['DueDate'];
      $ItemCustomerFullName = $row['City'];
      $PO_number = $row['PO_number'];
      $ItemAmount = $row['ItemAmount'];
      $preorder_ = $row['preorder_'];
      $Quantity = $row['Quantity'];
      $Vendor = $row['Vendor'];
      $balance = $row['balance'];
      $user_arr[] = array($ref,$memo,$Txndate,$duedate,$ItemCustomerFullName,$PO_number,$ItemAmount,$preorder_,$Quantity,$Vendor,$balance);
   ?>
      <tr>

       <td><?php echo $ref; ?></td>
       <td><?php echo $memo; ?></td>
       <td><?php echo $Txndate; ?></td>
       <td><?php echo $duedate; ?></td>
       <td><?php echo $ItemCustomerFullName; ?></td>
       <td><?php echo $PO_number; ?></td>
       <td><?php echo $ItemAmount; ?></td>
       <td><?php echo $preorder_; ?></td>
       <td><?php echo $Quantity; ?></td>
       <td><?php echo $Vendor; ?></td>
       <td><?php echo $balance; ?></td>
       <td><? php echo $owner; ?></td>

      </tr>
   <?php
    }
   ?>
   </table>
   <?php
    $serialize_user_arr = serialize($user_arr);
   ?>
  <textarea name='export_data' style='display: none;'><?php echo $serialize_user_arr; ?></textarea>
 </form>
</div>