php redirect header location pagina bianca

[giuliano75]

Ciao a tutti ho un problema con redirect header location mi da una pagina bianca senza farmi vedere il codice inserito e il browser non mi segnala nessun errore lavoro in locale con exampp

<?php
class UserController
{
public $username = '';
private $logged = false;
private $usermodel = '';

public function __construct()
{ $this->usermodel = new UserModel();
session_start();


if ($_SERVER['REQUEST_METHOD']=='POST' && isset($_GET['action'])&& $_GET['action']== 'login' ){
$username = (isset($_POST['username']))? $_POST['username'] :false ;
$password = (isset($_POST['password']))? $_POST['password'] :false ;
var_dump($username,$password);
if ($username !=false && $password !=false && $this->usermodel->checkLogin($username, $password)){

$this->username =$username ;
$this->logged = true ;

$_SESSION['username']= $username ;
$_SESSION['logged']= true ;
$_SESSION[ 'message' ] = 'Login effettuato correttamente';
}else{
$_SESSION[ 'message' ] = 'Errore con il login; riprovare!';
}
}
elseif (isset($_GET['action'])&& $_GET['action']== 'logout'){
unset($_SESSION['username']);
unset($_SESSION['logged']);
$_SESSION[ 'message' ] = 'Logout effettuato correttamente';
}
elseif (isset($_SESSION['username'])&& isset($_SESSION['logged'])){

$this->username = $_SESSION['username'] ;
$this->logged = true ;
}
elseif(($_SERVER['REQUEST_METHOD']=='POST' && isset($_GET['action'])&& $_GET['action']== 'registra' )){

$username = (isset($_POST['username']))? $_POST['username'] :false ;
$password = (isset($_POST['password']))? $_POST['password'] :false ;
$repassword = (isset($_POST['repassword']))? $_POST['repassword'] :false ;
$nome_reale = (isset($_POST['nome_reale']))? $_POST['nome_reale'] :false ;
$email = (isset($_POST['email']))? $_POST['email'] :false ;



if ($username !=false && $password !=false && $repassword !=false && $nome_reale && $email !=false
&& $this->usermodel->Registration($username,$password,$repassword,$nome_reale,$email) )
{
$this->username =$username ;
$this->logged = true ;


$_SESSION['username']= $username ;
$_SESSION['logged']= true ;
$_SESSION[ 'message' ] = "registrazione effettuato correttamente benvenuto $username";
}
}
$this->redirectToProperArea();
}

public function logged(){
return $this->logged ;
}
public function redirectToProperArea(){

$script_file = basename( $_SERVER[ 'SCRIPT_NAME' ] );

if ( $this->logged() && $script_file == 'login.php' ) {

header( 'location: ../index.php' );
die();
}
elseif ( !$this->Logged() && ( $script_file == 'index.php' && isset( $_GET[ 'action' ] ) && $_GET[ 'action' ] != 'index' && $_GET[ 'action' ] != 'detail' && $_GET[ 'action' ] != 'logout' ) ) {

header( 'location:../login.php');
die();
}
elseif ( $this->logged() && $script_file == 'registra.php' ) {

header( 'location:views/benvenuto.php' );
die();
}
}
}


grazie per l aiuto