SOS Call to a member function fetch() on a non-object in ligne

Bonjour,

Call to a member function fetch() on a non-object in ligne 84



82 <?php
83 $req = $db->query('SELECT name, file_url FORM files');
84 while($data = $req->fetch()){
85 echo $data['name'].' : '.'<a href="'.$data['file_url'].'">Télecharger '.$data['name'].'</a>';
}
?>