According to [CUBRIDSUS-7538 | http://bts4.nhncorp.com/nhnbts/browse/CUBRIDSUS-7538\], we need to modify functions [cubrid_get_db_parameter | http://www.php.net/manual/en/function.cubrid-get-db-parameter.php\] and [cubrid_set_db_parameter | http://www.php.net/manual/en/function.cubrid-set-db-parameter.php\].