PHP class and extends

Hi ! I've got a problem with class extends. I've a "top" class which name is cl_app. xxx_cl_app is an extend of cl_app. Cl_app define a function called "ExecuteQuery". xxx_cl_app define this function too but this one is obsolete. Now, I want to use the cl_app "ExecuteQuery" function in my app but there is a problem : In the cl_app class, "ExecuteQuery" function return 2 object : $return = array($nb_lines, $array_results) and the xxx_cl_app defined this function as : $return = array($array_results, $nb_lines) I don't want to recode all others scripts and I don't want to put the new function code in xxx_cl_app. So here is my question : Is there something to do in order that when I use xxx_cl_app->ExecuteQuery(), there's a function ExecuteQuery() in xxx_cl_app that do something like this : (xxx_cl_app.php) function ExecuteQuery(x,y) { $tmpResult = [herited_class]->ExecuteQuery(x,y); return array($tmpResult[1], $tmpResult[0]); } Thanks in advance ! (o_ BENARD Jean-Philippe - Consultant STERIA Infogérance (o_ (o_ //\ RENAULT DTSI/ODPS/R@D * ALO * API : MLB 02C 1 14 (/)_ (\)_ V_/_ 2 Av du vieil étang * 78181 MONTIGNY-LE-BRETONNEUX Tél : +33 1-30-03-47-83 * Fax : +33 1-30-03-42-10