我试图根据按钮值从oracle中提取一个值

Question

当在表中单击某行时，我正在使用引导程序模式弹出。当它弹出时，我将获得所需的所有值。我在模态中有三个按钮。我需要其中之一仅根据显示的值之一显示。我目前有一个php if语句来确定按钮是否显示。我不确定如何从当前模式中获取值到php if语句

<div class="modal hide fade" id="myModal">
<div class="modal-dialog modal-lg">
    <div class="modal-content">
        <div class="modal-header">
            <h4 class="modal-title">Message Information</h4>
            <button type="button" class="close" data-dismiss="modal"
                aria-label="Close">
                <span aria-hidden="true">&times;</span>
            </button>
        </div>
        <div id="rowID" class="modal-body">
            <table class="table table-bordered">
                <thead>
                    <!-- bgcolor="#D4AF37" -->
                    <tr>
                        <th>Note Code</th>
                        <th>Start Date</th>
                        <th>End Date</th>
                        <th>Recurring</th>
                        <th>Active</th>
                        <th>Activity Date</th>
                        <th>Message Key</th>
                        <th>Period Key</th>
                        <!--                <th>Message Text</th> -->
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td id="noteCode"></td>
                        <td id="startDate"></td>
                        <td id="endDate"></td>
                        <td id="recurring"</td>
                        <td id="active"></td>
                        <td id="activityDate"></td>
                        <td id="messageKey"></td>
                        <td id="periodKey"></td>
                        <!--                   <td id="messageText"</td> -->
                    </tr>
                </tbody>
            </table>
            <h5>
                <b>Message text</b>
            </h5>
            <p style="font-size: 16px" id="messageText"</p>
        </div>
        <div class="modal-footer">
            <div id="end" class="text-left">
                <button type="button" class="btn btn-end" title="Stop Message Period">Stop</button>
            <?php
            $can_delete = $bw_message->can_delete($$period_key);
            if ($can_delete) {
                echo '<div id="delete" class="text-left">';
                echo '<button type="button" class="btn btn-delete" title="Delete Message Period">Delete</button>';
                echo '</div>';
            }
            ?>

            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
    </div>
    <!-- /.modal-content -->
</div>
<!-- /.modal-dialog -->

我正在使用的特定语句是

<?php
            $can_delete = $bw_message->can_delete($$period_key);
            if ($can_delete) {
                echo '<div id="delete" class="text-left">';
                echo '<button type="button" class="btn btn-delete" title="Delete Message Period">Delete</button>';
                echo '</div>';
            }
            ?>

任何帮助将不胜感激。