ciao, intanto grazie per la risposta!
bhè il tag table manca perchè non ho inserito tutto il codice, che sarebbe:
Codice PHP:
<table cellSpacing="0" cellPadding="0" border="1" id="tabellina">     <tr>       <td align="center"><p id="TestoPiccolo">Id</p></td>       <td align="center"><p id="TestoPiccolo">Nome File</p></td>       <td align="center"><p id="TestoPiccolo">Percorso File</p></td>       <td align="center"><p id="TestoPiccolo">Versione</p></td>       <td align="center"><p id="TestoPiccolo">Commenti</p></td>       <td align="center"><p id="TestoPiccolo">Azioni</p></td>     </tr>      <input type="hidden" name="form_done" value="1"/>     $result $mysqli->query($query);         while($row $result->fetch_assoc()){             printf("<tr><td align='center' >

"
.$row['id']."</p></td><td align='center'>

"
.$row['nome']."</p></td><td align='center' style=\'width:50px\'>

"
.$row['file']."</p></td><td align='center'>

"
.$row['versione']."</p></td><td align='center'>

"
.$row['commenti']."</p></td>");             printf("<td align='left'><form name=\"modify\" action=\"gestisciFile.php\" method=\"POST\">");             printf("<input type='hidden' name='id_mod' value='".$row['id']."'>");             printf("<input type='hidden' name='nome' value='".$row['nome']."'>");             printf("<input type='hidden' name='file' value='".$row['file']."'>");             printf("<input type='hidden' name='commenti' value='".$row['commenti']."'>");             printf("<input type='hidden' name='versione' value='".$row['versione']."'>");             printf("<input type='hidden' name='action' value=\"modify\">");             printf("<input type='hidden' name='form_done' value=\"1\">");             printf("<input type='submit' value='Modifica'/>");             printf("</form><form name=\"delete\" action=\"gestisciFile.php\" method=\"POST\">");             printf("<input type='hidden' name='action' value=\"delete\">");             printf("<input type='hidden' name='form_done' value=\"2\">");             printf("<input type='hidden' name='id_del' value='".$row['id']."'>");             printf("<input type='hidden' name='file' value='".$row['file']."'>");             printf("<input type='submit' value='Elimina'>");             printf("</form></td></tr>");             printf("<input type='hidden' name='nome".$row['id']."' value='".$row['nome']."'>");             }     }     ?>     </table>