Notice: Undefined variable: results in C:xampphtdocsTest WebsiteIncludesdatabaseconnect.php on line 25

$dbServername = "localhost";
$dbUsername = "root";
$dbPassword = "";
$dbName = "phplessons";

$conn = new mysqli($dbServername, $dbUsername, $dbPassword, $dbName);

if ($conn->connect_errno) {
  printf("Connection failed %sn", $conn->connect_error);
  exit();
}

$id = 8;
$stmt = $conn->prepare("Select * FROM posts WHERE ID=?");
$stmt->bind_param("d", $id);
$stmt->execute();
$result = $stmt->get_result();

while ($row = $result->fetch_object()) {
  $results[] = $row;
}

print_r($results);

?>