Ciao

codice:
$img_piccola=$_FILES['img_piccola']['name']; 

$uploaddir = '/wwwroot/test/immagini/'; 
print "<pre>"; 
if (move_uploaded_file($_FILES['img_piccola
']['tmp_name'], $uploaddir . $_FILES['img_piccola']['name']))else { echo "error";}
dopo $img_piccola direi....

:-)