Non capisco perchè.......

[z3bmckey]

buongiorno ho un problema con questo codice:

<?php
include('dati.php');
session_start();
  $link=mysql_connect("$databaseHostName","$databaseUserName","$databaseUserPassword")
       or die ("Non riesco a connettermi a $databaseHostName");
       mysql_select_db ($databaseName, $link)
       or die ("Non riesco a selezionare il db $databaseName<br>");
?>
 <form action='' method='post'>
   <tr>
   <td>Tipo di richiesta</td>
   <td>:</td>
    <td><input type='radio' name='btn_submit' value='1'  onclick='this.form.submit();'>Intervento  Tecnico</input></td>
   <td><input type='radio'  name='btn_submit' value='2' onclick='this.form.submit();'>Materiale  di consumo</input></td>
   <td><input  type='radio' name='btn_submit' value='3'  onclick='this.form.submit();'>HW/SW aggiuntivo  </input></td>
 <?php   
 $btn_submit = $_POST['btn_submit'];    //linea 78
 $_SESSION['btn_submit'] = $btn_submit;
   
 if ($btn_submit=='1')
   {
      echo "<textarea name='comments' cols='105' rows='9'>richiesta intervento tecnico...</textarea><br>";
   }
 if ($btn_submit=='2')
   {
      $RMC = "SELECT marca,matricola FROM materiali";
      mysql_query($RMC) or die (mysql_error());
      echo "<table  width='600px' align='center' border='1' bgcolor='#CCFFFF'>
                                <tr>
                                <th>Marca</th>
                                <th>Matricola</th>
                               </tr>";
                        while($row = mysql_fetch_array($RMC))   //linea 94
                        {
                        echo "<tr>";
                        echo "<td>" . $row['marca'] . "</td>";
                        echo "<td>" . $row['matricola'] . "</td>";
                        }
   }            
   
 if ($btn_submit=='3')
   {   
      echo "<textarea name='comments' cols='105' rows='9'>richiesta HW/SW aggiuntivo...</textarea><br>";
   }
 ?>
</tr>

di seguito un tail del /var/log/httpd/error.log

[Thu Jun 05 11:30:29 2014] [error] [client 127.0.0.1] PHP  Notice:  Undefined index: btn_submit in /var/www/html/personale.php on  line 78
[Thu Jun 05 11:30:33 2014] [error] [client 127.0.0.1] PHP  Warning:  mysql_fetch_array() expects parameter 1 to be resource, string  given in /var/www/html/personale.php on line 94, referer:  http://127.0.0.1/personale.php

Infine i Dati relativi al sistema:

S.O. Centos 6.5
php-5.3.3-27.el6_5.x86_64
httpd-2.2.15-29.el6.centos.x86_64
mysql-5.1.73-3.el6_5.x86_64

spero possiate essermi d'aiuto, grazie.