你让自己的生活变得比需要的更困难。
我已经注解了代码，而不是写一个问题和更改的列表

#add an order by ean to your query
$stmt = $mysqliConn->prepare("SELECT id, hdr_id_fk, package_number, ean, 
                                     quantity, requested_qty, order_number 
                            from warehouse_feedback 
                            where hdr_id_fk =?  
                            ORDER BY ean");
$hdr_id = 31;
$stmt->bind_param("i", $hdr_id);
$stmt->execute();
$result = $stmt->get_result();
$results = $result->fetch_all(MYSQLI_ASSOC);

# no need for the pre-loop to reformat the result data
# process the results now as a long list watching for changes in the EAN code

<!-- table code -->
<table border="1">
        <thead>
            <tr>
                <th>ID</th>
                <th>Pack_num</th>
                <th>Order Id</th>
                <th>EAN</th>
                <th>ReqQty</th>
                <th>Confrmd Qty</th>
            </tr>
        </thead>
        <tbody>
<?php 
// initialise our counters and the current EAN code
$reqQty = 0;
$confQty = 0;
$curEan = null;
$lastRow = []; // so we can output the last row of an ean 

foreach ($results as $result) {

    if ( $EAN == $result['ean']) {
        # we are processing another of the same ean rows
        # so accumulate the totals for later
        $reqQty     += $result['quantity'];
        $confQty    += $result['order_number'];

        // save a couple of bits for the change of EAN situation
        $lastRow = [
                    'ean' => $result['ean'], 
                    'order_number' => $result['order_number'
                    ];
        
        // and then output a standard row        
?>
        <tr>
            <td><?php echo $result['id']; ?></td>
            <td><?php echo $result['package_number']; ?></td>
            <td><?php echo $result['order_number']; ?></td>
            <td><?php echo $result['ean']; ?></td>
            <td><?php echo $result['requested_qty']; ?></td>
            <td><?php echo $result['quantity']; ?></td>
        </tr>
<?php
    } else {
        // ean changed, so output totals for the previous ean 
        // that we have been accumulating
?>
        <tr>
        <td>&nbsp;</td>
        <td>&nbsp;</td>
        <td><strong><?php echo $lastRow['order_number']; ?></strong></td>
        <td><strong><?php echo $lastRow['ean']; ?></strong></td>
        <td><?php echo "Req Qty - $reqQty"; ?></td>
        <td><?php echo "Confirmed Qty - $confQty"; ?></td>
    </tr>
<?php
        # so as we just output the totals row zeroise the counters
        $reqQty     = 0;
        $confQty    = 0;
        // and remember the new EAM
        $curEan     = $result['ean'];
    }
?>
        </tbody>
    </table>

Here is the answer to my question.

$stmt = $mysqliConn->prepare("SELECT id,hdr_id_fk,package_number,ean,quantity,requested_qty,order_number,sscc_code from desadv_message_lines where hdr_id_fk =? ");
$hdr_id = 31;
$stmt->bind_param("i", $hdr_id);
$stmt->execute();
$result = $stmt->get_result();
$results = $result->fetch_all(MYSQLI_ASSOC);
$finalResults = [];
foreach($results as $result){
    $finalResults[$result['ean']][$result['order_number']][] = $result;
}

?>

<!-- table code -->
<table border="1">
        <thead>
            <tr>
                <th>ID</th>
                <th>Pack_num</th>
                <th>SSCC</th>
                <th>Order Id</th>
                <th>EAN</th>
                <th>ReqQty</th>
                <th>Confrmd Qty</th>
            </tr>
        </thead>
        <tbody>
            <?php 
             foreach ($finalResults as $finalResultItem) {                
                foreach ($finalResultItem as $finalResult) {         
                $confirmedQuantity = $reqQuantity = 0;

               foreach ($finalResult as $finalRes) {
                    $confirmedQuantity += $finalRes['quantity'];
                    $reqQuantity = $finalRes['requested_qty'];
                ?>

                    <tr>
                        <td><?php echo $finalRes['id']; ?></td>
                        <td><?php echo $finalRes['package_number']; ?></td>
                        <td><?php echo $finalRes['sscc_code']; ?></td>
                        <td><?php echo $finalRes['order_number']; ?></td>
                        <td><?php echo $finalRes['ean']; ?></td>
                        <td><?php echo $finalRes['requested_qty']; ?></td>
                        <td><?php echo $finalRes['quantity']; ?></td>
                    </tr>
                <?php } ?>
                <tr>
                    <td></td>
                    <td></td>
                    <td></td>
                    <td><?php echo $finalResult[0]['order_number']; ?></td>
                    <td><?php echo $finalResult[0]['ean']; ?></td>
                    <td><?php echo '<b>Req Qty: ' . $reqQuantity.'</b>'; ?></td>
                    <td><?php echo '<b>Confrmd Qty: ' . $confirmedQuantity.'</b>'; ?></td>
                </tr>
            <?php } }?>
        </tbody>
    </table>

I don't know everyone down voted. Does this have format issues or not clear or did I just asked I want this / that without showing any effort?
Any have THANKS