动态数据传递：将表格行数据填充到Bootstrap模态框表单

<table class="table table-striped table-responsive">
  <thead>
    <tr>
      <th scope="col">#</th>
      <th scope="col">Name</th>
      <th scope="col">EMAIL</th>
      <th scope="col">SUBJECT</th>
      <th scope="col">MESSAGE</th>
      <th scope="col">TIME</th>
      <th scope="col">Action</th>
    </tr>
  </thead>
  <tbody>
    <?php
    // 假设 $conn 已经连接到数据库
    $sql = "SELECT id, name, email, subject, message, time FROM contact";
    $records = mysqli_query($conn, $sql);

    while ($data = mysqli_fetch_array($records)) {
    ?>
      <tr>
        <td><?php echo htmlspecialchars($data['id']); ?></td>
        <td><?php echo htmlspecialchars($data['name']); ?></td>
        <td><?php echo htmlspecialchars($data['email']); ?></td>
        <td><?php echo htmlspecialchars($data['subject']); ?></td>
        <td><?php echo htmlspecialchars($data['message']); ?></td>
        <td><?php echo htmlspecialchars($data['time']); ?></td>
        <td>
          <!-- 使用 data-bs-whatever 传递 email 地址 -->
          <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#replyModal" data-bs-whatever="<?php echo htmlspecialchars($data['email']); ?>">
            Reply
          </button>
        </td>
      </tr>
    <?php
    }
    ?>
  </tbody>
</table>

<!-- 模态框定义在PHP循环之外 -->
<div class="modal fade" id="replyModal" tabindex="-1" aria-labelledby="replyModalLabel" aria-hidden="true">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="replyModalLabel">回复邮件</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
        <form method="POST" role="form" enctype="multipart/form-data" action="">
          <div class="row">
            <!-- 添加收件人邮件地址输入框 -->
            <div class="col-md-12 mb-3">
              <label for="recipient-email" class="col-form-label">收件人:</label>
              <input type="email" class="form-control" name="email" id="recipient-email" readonly>
              <!-- 建议设为 readonly 或 hidden，避免用户修改 -->
            </div>

            <div class="col-md-6 mb-3">
              <label for="email-subject" class="col-form-label">邮件主题:</label>
              <input type="text" class="form-control" name="subject" id="email-subject">
            </div>

            <div class="mb-3">
              <label for="message-text" class="col-form-label">消息内容:</label>
              <textarea class="form-control" rows="8" name="message" id="message-text"></textarea>
            </div>

            <div class="col-md-6 mb-3">
              <label for="attachment" class="col-form-label">附件</label>
              <input type="file" class="form-control" name="file[]" multiple="multiple" id="attachment">
            </div>
          </div>
          <button name="submit" type="submit" class="btn btn-primary">发送邮件</button>
        </form>
      </div>
    </div>
  </div>
</div>

<script>
  // 获取模态框元素
  var replyModal = document.getElementById('replyModal');

  // 监听模态框的 show.bs.modal 事件 (Bootstrap 5)
  replyModal.addEventListener('show.bs.modal', function (event) {
    // 获取触发模态框的按钮
    var button = event.relatedTarget;

    // 从按钮的 data-bs-whatever 属性中提取邮件地址
    var recipientEmail = button.getAttribute('data-bs-whatever');

    // 获取模态框中的收件人邮件输入框
    var recipientInput = replyModal.querySelector('#recipient-email');
    // 获取模态框标题
    var modalTitle = replyModal.querySelector('.modal-title');

    // 填充输入框的值
    recipientInput.value = recipientEmail;
    // 更新模态框标题，例如显示发送给谁
    modalTitle.textContent = '回复邮件给: ' + recipientEmail;
  });
</script>

<?php
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

// 确保PHPMailer库已通过Composer安装并自动加载
// require 'vendor/autoload.php'; // 如果使用Composer

if (isset($_POST['submit'])) {
    // 引入PHPMailer类文件
    require 'path/to/PHPMailer/src/Exception.php';
    require 'path/to/PHPMailer/src/PHPMailer.php';
    require 'path/to/PHPMailer/src/SMTP.php';

    $mail = new PHPMailer(true);
    try {
        // SMTP 配置
        $mail->isSMTP();
        $mail->SMTPDebug = 0; // 0 = off (for production)
        $mail->Host = 'smtp.gmail.com';
        $mail->SMTPAuth = true;
        $mail->Username = "your_email@gmail.com"; // 替换为你的Gmail邮箱
        $mail->Password = "your_app_password"; // 替换为你的Gmail应用密码
        $mail->SMTPSecure = 'tls';
        $mail->Port = 587;

        // 发件人
        $mail->setFrom("your_email@gmail.com", "Your Name"); // 替换为你的发件人信息

        // 收件人 - 从表单中获取
        $recipientEmail = filter_var($_POST['email'], FILTER_SANITIZE_EMAIL); // 过滤邮件地址
        if (!filter_var($recipientEmail, FILTER_VALIDATE_EMAIL)) {
            throw new Exception("无效的收件人邮件地址。");
        }
        $mail->addAddress($recipientEmail);

        // 内容
        $mail->isHTML(true);
        $mail->Subject = htmlspecialchars($_POST['subject']); // 过滤主题
        $mail->Body    = htmlspecialchars($_POST['message']); // 过滤消息内容

        // 附件处理
        if (isset($_FILES['file']) && count($_FILES['file']['tmp_name']) > 0) {
            for ($i = 0; $i < count($_FILES['file']['tmp_name']); $i++) {
                if (is_uploaded_file($_FILES['file']['tmp_name'][$i])) {
                    $mail->addAttachment($_FILES['file']['tmp_name'][$i], $_FILES['file']['name'][$i]);
                }
            }
        }

        $mail->send();
        echo '您的邮件已成功发送！';
    } catch (Exception $e) {
        echo "邮件发送失败！ PHPMailer Error: {$mail->ErrorInfo}";
    }
} else {
    // 通常在表单未通过POST提交时触发
    // echo "联系文档有问题！"; // 这条消息可能不准确，可以改为“请通过表单提交。”
}
?>