Warning: Undefined variable $db_conn_mm in D:\xampp\htdocs\m_m\department\department_modal_del_edit.php on line 60

Fatal error: Uncaught Error: Call to a member function getAll() on null in D:\xampp\htdocs\m_m\department\department_modal_del_edit.php:60 Stack trace: #0 {main} thrown in D:\xampp\htdocs\m_m\department\department_modal_del_edit.php on line 60