dedecms调用自定义表单

{dede:form action="save.php" method="post"}
    <div>
        <label for="name">姓名：</label>
        <input type="text" id="name" name="name" required>
    </div>
    <div>
        <label for="email">邮箱：</label>
        <input type="email" id="email" name="email" required>
    </div>
    <div>
        <label for="message">留言：</label>
        <textarea id="message" name="message" required></textarea>
    </div>
    <div>
        <input type="submit" value="提交">
    </div>
{/dede:form}

<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $name = $_POST['name'];
    $email = $_POST['email'];
    $message = $_POST['message'];

    // 数据验证和存储逻辑
    if (empty($name) || empty($email) || empty($message)) {
        echo "所有字段都是必填的";
        exit;
    }

    // 存储数据到数据库
    $db = new PDO('mysql:host=localhost;dbname=dedecms', 'username', 'password');
    $stmt = $db->prepare("INSERT INTO `form_data` (`name`, `email`, `message`) VALUES (?, ?, ?)");
    $stmt->execute([$name, $email, $message]);

    echo "提交成功！";
}
?>