prova usando la funzione copy invece del move_uploaded_file
Codice PHP:
if (is_uploaded_file($_FILES['upfile']['tmp_name'])) {
$path = "myfolder/";
$filename = urlencode($_FILES['upfile']['name']);
if (!copy($_FILES['upfile']['tmp_name'], $path . $filename)) {
@unlink($_FILES['upfile']['tmp_name']);
echo "Error while copying the file!";
}
} else {
echo "File not uploaded!";
}