function internalServerError($msg)
{
    setStatus(500, "Internal Server Error");
    setContentTypeJson();
    echo '{"error":"' . $msg . '"}';
    die;
}
function resultToJsonObject($result)
{
    $row = $result->fetch_assoc();
    if ($row) {
        encodeData($row);
        setContentTypeJson();
        echo json_encode($row);
    } else {
        setStatus(404, "Not Found");
    }
}