[HELP] ผมจะใช้ while loop 2-3 ชั้นใน PDF ควรทำอย่างไรครับ มันไม่เหมือนกับที่รัน HTML ?

<table id="table-list" width="100%">
                <tr>
                    <th><p>Item</p></th>
                    <th><p>Model</p></th>
                    <th><p>Imei</p></th>
                    <th><p>Symptom</p></th>
                    <th><p>Description</p></th>
                    <th><p>Qty.</p></th>
                    <th><p>Price(THB)</p></th>
                    <th><p>Amount(THB)</p></th>
                </tr>
                <?php
                $i = 1;
                $sql_select = "SELECT qt_quotation_list.* FROM qt_quotation_list
                WHERE Quot_No = '".$rs['Quot_No']."'
                GROUP BY Qlist_Imei";
                $query_select = mysqli_query($conn, $sql_select);
           

                while($row = mysqli_fetch_array($query_select))
                {
                    $sql_check ="SELECT qt_quotation_list.* FROM qt_quotation_list
                    WHERE Quot_No = '".$rs['Quot_No']."' AND Qlist_Imei = '".$row['Qlist_Imei']."'";
                    $query_check = mysqli_query($conn, $sql_check);
                    $rowSpan= mysqli_num_rows($query_check);
                ?>
                <tr class="text-center">
                    <td rowspan="<?= $rowSpan?>" class="text-center" width="40px"><p><?= $i?></p></td>
                    <td rowspan="<?= $rowSpan?>" class="text-center"><p><?= $row['Qlist_Model']?></p></td>
                    <td rowspan="<?= $rowSpan?>" class="text-center"><p><?= $row['Qlist_Imei']?></p></td>
                    <?php
                    $sql_select2 = "SELECT * FROM qt_quotation_list
                    WHERE Qlist_Imei = '".$row['Qlist_Imei']."' AND Quot_No = '".$rs['Quot_No']."'
                    GROUP BY Qlist_Symptom";
                    $query_select2 = mysqli_query($conn, $sql_select2);

                    while($row = mysqli_fetch_array($query_select2))
                    {
                        $sql_check2 ="SELECT qt_quotation_list.* FROM qt_quotation_list
                        WHERE Quot_No = '".$rs['Quot_No']."' AND Qlist_Imei = '".$row['Qlist_Imei']."' AND Qlist_Symptom = '".$row['Qlist_Symptom']."'";
                        $query_check2 = mysqli_query($conn, $sql_check2);
                        $rowSpan2= mysqli_num_rows($query_check2);
                        ?>
                        
                        <td rowspan="<?=$rowSpan2?>" class="text-left"><p><?= $row['Qlist_Symptom']?></p></td>

                        <?php
                          $sql_select3 = "SELECT * FROM qt_quotation_list
                          WHERE Qlist_Symptom = '".$row['Qlist_Symptom']."' AND Quot_No = '".$rs['Quot_No']."' AND Qlist_Imei = '".$row['Qlist_Imei']."'";
                          $query_select3 = mysqli_query($conn, $sql_select3);
                          while($row = mysqli_fetch_array($query_select3))
                          {
                        ?>
                            <td class="text-left" min-width="300px"><p><?= $row['Qlist_Description']?></p></td>
                            <td class="text-center" width="10px"><p><?= $row['Qlist_Qty']?></p></td>
                            <td class="text-right" width="10px"><p><?= $row['Qlist_Price']?></p></td>
                            <td class="text-right" width="10px"><p><?= $row['Qlist_Amount']?></p></td> 
                    </tr>
                <?php
                          }
                    }
                $i++;
                }
                ?>
           
            </table>