Ho risolto.
In questo modo :
Codice PHP:
                      $FNpdo->beginTransaction(); // apro transazione                            /*aggiungo record su fatture*/                    try                    {                        $sql = 'select * from utenti where ut_id=29' ;                        $result = $pdo->query($sql);                          foreach ($result as $res):                             echo "<br> ";                     endforeach;                         }                      catch (PDOException $e)                        {                        $error = 'Error adding Fatture: ' . $e->getMessage();                        echo "<script type=\"text/javascript\">alert(\"".$error."\");</script>";                        }                        $insData = array_unique($res);                        unset($insData['ut_id']);                        $prep = array();
                        
foreach($insData as $k => $v )                        {                            $prep[':'.$k] = $v;
                        }                                                
$sth $FNpdo->prepare("INSERT INTO utenti ( " implode(', ',array_keys($insData)) . ") VALUES (" implode(', ',array_keys($prep)) . ")");                        try                        {                        $res $sth->execute($prep);                        }                        catch (PDOException $e)                        {                        $error 'Error adding Fatture: ' $e->getMessage();                        echo "<script type=\"text/javascript\">alert(\"".$error."\");</script>";                        }                        $FNpdo->commit(); // chiudo transazione