通过PHP从Modal获取user_ID

Question

我正在尝试为获取的行传递每个模态的ID。如果我尝试获取edit_id值，它将始终返回第一个获取的值。我错过了什么？有人能帮帮我吗？

while($row=mysqli_fetch_row($result_set)){?>

            <li class="gen-row">
                <div class="gen">

                    <div class="gen-controls">
                        <div class="gen-control"><a href="#" data-toggle="modal" data-target="#myModal<?php echo $row[0]; ?>"><span class="glyphicon glyphicon-pencil"></span></a></div>

                        <!-- Edit Modal -->
                        <div class="modal fade" id="myModal<?php echo $row[0]; ?>" role="dialog">
                            <div class="modal-dialog">

                                <!-- Modal content-->
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <button type="button" class="close" data-dismiss="modal">&times;</button>
                                        <h4 class="modal-title">Erstellen Sie ein neues Genogramm </h4>
                                    </div>
                                    <div class="modal-body">

                                        <form action="edit_data.php" method="post" id="genogramm-anlegen">
                                            <input type="text" id="edit_id" name='edit_id' value='<?php echo $row[0]; ?>'>
                                        </form>

                                    </div>
                                    <div class="modal-footer">
                                        <button type="submit" class="btn btn-default" form="genogramm-anlegen" name="btn_edit">Speichern</button>
                                        <button type="button" class="btn btn-default" data-dismiss="modal">Abbrechen</button>
                                    </div>
                                </div>
                            </div>
                        </div>


                    </div>
                </div>
            </li>


            <?php
        }

edit_data.php：

if(isset($_POST['btn_edit'])) {

$user_id = mysqli_real_escape_string($link, $_REQUEST['edit_id']);

echo $user_id;