Do you try with an other variable ? yes, i used $guestbookid but now, i'm trying another thing.. on admin/index.php: $guestbookid = $_GET['id']; on include/admin_include.php: include($chem_absolu."config/config_base_$guestbookid.".$alex_livre_ext); and then do config_base_1.php,config_bas...