Variabile post in percorso

[satifal]

<?php
//sposto gli elementi in una directory chiamata file
$periodo = $_POST['periodo'];
if(isset($_FILES['file']))
    foreach($_FILES['file']['tmp_name'] as $key=>$value)
        @move_uploaded_file($value, (__FILE__)."/../prova/pdf/$periodo/".$_FILES['file']['name'][$key]);
?>