dedecms前台表单

<!-- 示例表单 -->
<form action="submit.php" method="post">
    <input type="text" name="username" placeholder="用户名">
    <input type="email" name="email" placeholder="邮箱">
    <button type="submit">提交</button>
</form>

// 示例PHP处理脚本
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $username = $_POST['username'];
    $email = $_POST['email'];

    // 数据库连接示例（假设使用PDO）
    try {
        $pdo = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
        $stmt = $pdo->prepare("INSERT INTO users (username, email) VALUES (?, ?)");
        $stmt->execute([$username, $email]);
        echo "提交成功！";
    } catch (PDOException $e) {
        echo "数据库错误：" . $e->getMessage();
    }
}
?>

<!-- 示例前端验证 -->
<script>
document.querySelector('form').addEventListener('submit', function(event) {
    var username = document.querySelector('input[name="username"]').value;
    var email = document.querySelector('input[name="email"]').value;

    if (username === '' || email === '') {
        alert('用户名和邮箱不能为空！');
        event.preventDefault();
    }
});
</script>