Error in your SQL syntax

Bonjour,

configuration sous xampp, mysql 5.1.37, apache 2.2.12, php 5.3.0

j'ai le message suivant :

Invalid query: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''rights' WHERE 'id_folder' IN (\11\12\13\,0)' at line 1
Query: SELECT CONCAT('id_user','-','id_folder'), 'rights' FROM dm_'rights' WHERE 'id_folder' IN (\11\12\13\,0);

j'ai isolé la partie du code qui semble en cause :

function listUsersWithFolderAccess($folder) {
$folder=intval($folder);
$fp=array();
if ($folder) {
// First, we list the folders_id in the path, in reverse side order (from the deeper folder_id up to the root)
$fp=queryOneField("SELECT folder_path FROM " . TABLE_PREFIX . "folders WHERE id_folder='$folder';");
if (substr($fp,0,1)=="/") $fp=substr($fp,1);
if (substr($fp,-1,1)=="/") $fp=substr($fp,0,-1);
$fp=array_reverse(explode("/",$fp)); // Here we have the folder id list
}
$fp[]=0;
$q = "SELECT CONCAT(id_user,'-',id_folder), rights FROM " . TABLE_PREFIX . "rights WHERE id_folder IN (".implode($fp,",").");";
$allrights=queryAssoc($q);
// Then, for each user, we check in this order that the user has the rights
$q = "SELECT * FROM " . TABLE_PREFIX . "users ORDER BY user_name ASC";
$r = mysql_query($q);
$listUsers=array();
while ($c=mysql_fetch_array($r)) {
// Check the user's rights
$hasright=false;
foreach($fp as $fid) {
if (isset($allrights[$c["id_user"]."-".$fid])) {
if (strpos($allrights[$c["id_user"]."-".$fid],"r")!==false) {
$hasright=true;

quelqu'un peut-il m'en dire un peu plus, j'ai essayé de modifier la syntaxe de la ligne en question sans grand succes....

Merci par avance de vos réponses