无法从SQL返回数组，仅返回mysqli_stmt

<?php
$mysqli = new mysqli("localhost", "username", "password", "database");

if ($mysqli->connect_error) {
    die("连接失败: " . $mysqli->connect_error);
}

$stmt = $mysqli->prepare("SELECT id, name FROM users WHERE id = ?");
$stmt->bind_param("i", $userId);

$userId = 1;
$stmt->execute();

$result = $stmt->get_result();

if ($result->num_rows > 0) {
    $rows = array();
    while ($row = $result->fetch_assoc()) {
        $rows[] = $row;
    }
    print_r($rows);
} else {
    echo "0 结果";
}

$stmt->close();
$mysqli->close();
?>