在HTML表单提交时插入到数据库

<form action="submit.php" method="POST">
  <label for="name">姓名：</label>
  <input type="text" id="name" name="name"><br><br>
  <label for="email">邮箱：</label>
  <input type="email" id="email" name="email"><br><br>
  <input type="submit" value="提交">
</form>

<?php
// 连接数据库
$servername = "数据库服务器地址";
$username = "数据库用户名";
$password = "数据库密码";
$dbname = "数据库名";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("数据库连接失败: " . $conn->connect_error);
}

// 获取表单数据
$name = $_POST['name'];
$email = $_POST['email'];

// 构造SQL语句并执行插入操作
$sql = "INSERT INTO 表名 (姓名, 邮箱) VALUES ('$name', '$email')";
if ($conn->query($sql) === TRUE) {
    echo "数据插入成功";
} else {
    echo "数据插入失败: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>

CREATE TABLE 表名 (
  id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  姓名 VARCHAR(30) NOT NULL,
  邮箱 VARCHAR(50) NOT NULL
);