i'm having a problem with my php code: browser show me this error: ERRNO: 8|TEXT:Undefined index:N° Asset con guasti i'm trying to do dinamic table taking data from a database, but something with the 'fetch_array(MYSQLI_ASSOC)' function must have gone wrong
<?php
require_once('FirePHPCore/FirePHP.class.php');
require_once('error_handler.php');
require_once('config.php');
$firephp = FirePHP::getInstance(true);
$mysqli = new mysqli(DB_HOST, 'Elia', '1234', 'test');
//query SQL da eseguire
$query = 'SELECT * FROM `livello_di_servizio`';
//esegue la query
$result = $mysqli->query($query);
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while ($row = $result->fetch_array(MYSQLI_ASSOC)){
//errore (undefined index)
echo "<tr><td class='tab_sx' style='text-align: left'>".$row['Etichette di riga']."</td>";
echo "<td class='gruppo' style='text-align: center'>".$row['Numero Macchine']."</td>";
echo "<td class='gruppo' style='text-align: right'>".$row['Ore Pianificate Mese']."</td>";
echo "<td class='gruppo' style='text-align: center'>".$row['N° Asset con guasti']."</td>";
echo "<td class='gruppo' style='text-align: right'>".$row['DT Periodo']."</td>";
echo "<td class='tab_guasti_top' style='text-align: center'>".$row['N° Guasti Totali']."</td>";
echo "<td bgcolor='#FFF' class='tab_dx' style='text-align: right'>".$row['QT \(Indisponibilità\)']."</td></tr>";
}
echo "</table></div></div>";?>