php将数据插入到mysql中，但从(不同)表中加载选项

$servername = "localhost";
$username = "your_username";
$password = "your_password";
$dbname = "your_database";

// 使用MySQLi扩展连接数据库
$conn = new mysqli($servername, $username, $password, $dbname);

// 使用PDO扩展连接数据库
$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);

// 假设有一个名为users的表，包含id、name和email字段
$name = "John Doe";
$email = "johndoe@example.com";

// 使用MySQLi扩展插入数据
$sql = "INSERT INTO users (name, email) VALUES ('$name', '$email')";
$conn->query($sql);

// 使用PDO扩展插入数据
$sql = "INSERT INTO users (name, email) VALUES (?, ?)";
$stmt = $conn->prepare($sql);
$stmt->execute([$name, $email]);

// 假设有一个名为options的表，包含id和option_name字段
// 加载选项时，从options表中检索option_name字段的值

// 使用MySQLi扩展加载选项
$sql = "SELECT option_name FROM options";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while ($row = $result->fetch_assoc()) {
        echo "<option value='" . $row['option_name'] . "'>" . $row['option_name'] . "</option>";
    }
}

// 使用PDO扩展加载选项
$sql = "SELECT option_name FROM options";
$stmt = $conn->prepare($sql);
$stmt->execute();

while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
    echo "<option value='" . $row['option_name'] . "'>" . $row['option_name'] . "</option>";
}