problema con form

[loHacker]

La variabile è $_SERVER non $SERVER e se nel form usi il metod="post" devi usarlo anche in php usando $_POST invece di $_GET.
Usa questo:

<?php
//////////////// /Admin/index.php
/////////// Nius Pro.
include("../config.php");
?>
<link href="../nius_chimeralabs.css" rel="stylesheet" type="text/css">
<table width="100%"  border="0" cellspacing="0" cellpadding="0">
  <tr>
    <th class="titolone" scope="row"><span class="Stile1">nius<span class="Stile2">:pro </span></span></th>
  </tr>
</table>


<?php
  if(!isset($_POST['page']))
{
?>
<form name="form1" method="post" action="<?php echo $_SERVER["PHP_SELF"]; ?>">
    <input type="hidden" name="page" value="menu">
  <table width="100%"  border="0" cellspacing="3" cellpadding="0">
    <tr>
      <th width="34%" class="testo" scope="row"><div align="right">username</div></th>
      <td width="50%"><input name="username" type="text" class="poster"></td>
    </tr>
    <tr>
      <th class="testo" scope="row"><div align="right">password</div></th>
      <td><input name="password" type="password" class="poster"></td>
    </tr>
    <tr>
      <th colspan="2" class="testo" scope="row"><input name="Submit" type="submit" class="poster" value="Invia">
      </th>
    </tr>
  </table>
</form>
<?php
}
elseif($_POST['page'] == "menu")

    {
        unset($_POST['page']);
        define("CONNESSIONE",true);
        define("ADMINISTRATION", true);
        define("USER_READ", true);
        include("../config.php");
        $row = mysql_num_rows($iea);
        if($row)
        {
            $risultato = mysql_fetch_array($iea);
            ?>
            <table width="100%"  border="0" cellspacing="0" cellpadding="0">
            <tr>
            <th colspan="2" class="poster" scope="row">Benvenuto: <?php echo $risultato["username"]; ?></th>
              </tr>
              <tr class="testo"><?php $username = $risultato["username"]; $password = $risultato["password"]; ?>
            <th scope="row">[url="?page=newsadd&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Aggiungi una news[/url]</th>
               <th scope="row">[url="?page=newsedit&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Modifica Una News[/url]</th>
            </tr>
              <tr class="testo">
            <th scope="row">[url="?page=newsedit&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Elimina una news[/url]</th>
            <th scope="row">-</th>
              </tr>
            <?php
            if($risultato["livello"] == "0")
            {
                ?>
                <tr class="testo">
                <th scope="row">-</th>
                <th scope="row">-</th>
                  </tr>
                  <tr class="testo">
                <th scope="row">-</th>
                <th scope="row">-</th>
                </tr>
                  <tr class="testo">
                <th scope="row">[url="?page=adduser&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Aggiungi un'user[/url]</th>
                <th scope="row">[url="?page=edituser&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Modifica un'user[/url]</th>
                  </tr>
                  <tr class="testo">
                <th scope="row">[url="?page=edituser&username=<?php echo $username; ?>&password=<?php echo $password; ?>"]Cancella un'user[/url]</th>
                <th scope="row"></th>
                  </tr>
                <?php
            }
            ?>
            </table>
            <?php
        }
    }

Non l'ho testato ma dovrebbe andare