codice:
<?php require_once('Connections/connessione.php'); ?>
<?php
// *** Validate request to login to this site.
session_start();

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($accesscheck)) {
  $GLOBALS['PrevUrl'] = $accesscheck;
  session_register('PrevUrl');
}

if (isset($_POST['Nome'])) {
  $loginUsername=$_POST['Nome'];
  $password=$_POST['Password'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "pagpers.php";
  $MM_redirectLoginFailed = "null.php";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_connessione, $connessione);
  
  $LoginRS__query=sprintf("SELECT cognome, password FROM utente WHERE cognome='%s' AND password='%s'",
    get_magic_quotes_gpc() ? $loginUsername : addslashes($loginUsername), get_magic_quotes_gpc() ? $password : addslashes($password)); 
   
  $LoginRS = mysql_query($LoginRS__query, $connessione) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";
    
    //declare two session variables and assign them
    $GLOBALS['MM_Username'] = $loginUsername;
    $GLOBALS['MM_UserGroup'] = $loginStrGroup;	      

    //register the session variables
    session_register("MM_Username");
    session_register("MM_UserGroup");

    if (isset($_SESSION['PrevUrl']) && false) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    header("Location: ". $MM_redirectLoginFailed );
  }
}
?>
per effettuare il login.. poi quando va nella pagina pagpers.php volevo visualizzare i dati dell'utente appena loggato..