Warning: mysqli_errno() expects exactly 1 parameter, 0 given in /www_root/lib/classDB.php on line 29

Warning: mysqli_error() expects parameter 1 to be mysqli, null given in /www_root/lib/classDB.php on line 29
get_result() err : sql : select board_idx from tb_board_pds WHERE partners_idx = 2 AND display_yn = 'Y' ORDER BY board_writedate DESC