dedecms 自定义表单联动

// 示例代码：PHP处理表单联动
if ($_POST['form1_field'] == 'value') {
    // 根据条件显示或隐藏表单2
    echo '<form id="form2">';
    // 表单2的字段
    echo '</form>';
}

// 示例代码：JavaScript处理表单联动
document.getElementById('form1').addEventListener('submit', function(event) {
    event.preventDefault();
    var form1Field = document.getElementById('form1_field').value;
    if (form1Field == 'value') {
        document.getElementById('form2').style.display = 'block';
    } else {
        document.getElementById('form2').style.display = 'none';
    }
});

// 示例代码：接收表单数据并存储到数据库
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $form1Field = $_POST['form1_field'];
    // 连接数据库并存储数据
    $conn = new mysqli($servername, $username, $password, $dbname);
    if ($conn->connect_error) {
        die("连接失败: " . $conn->connect_error);
    }
    $sql = "INSERT INTO form_data (field) VALUES ('$form1Field')";
    if ($conn->query($sql) === TRUE) {
        echo "数据插入成功";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
    $conn->close();
}