on a page, i have :
if (!empty($_FILES[\'logo\'][\'name\'])) {
$dossier = \'upload/\';
$fichier = basename($_FILES[\'logo\'][\'name\']);
I would test if (file_exists($_FILES['logo']['tmp_name'])) and see if it works.
Or, more approperately (thanks Baloo): if (is_uploaded_file($_FILES['logo']['tmp_name']))