$client=$app->db->queryOneRecord("SELECT client.*, sys_user.lost_password_function FROM client,sys_user WHERE client.username = '$username' AND client.email = '$email' AND client.client_id = sys_user.client_id");
$client=$app->db->queryOneRecord("SELECT client.*, sys_user.lost_password_function FROM client,sys_user WHERE client.username = ? AND client.email = ? AND client.client_id = sys_user.client_id",$username,$email);