money_format 함수는 윈도우에서는 지원을 안함.
메뉴얼에 가보면
php.net : http://www.php.net/manual/kr/function.money-format.php
Note: The function money_format() is only defined if the system has strfmon capabilities. For example, Windows does not, so money_format() is undefined in Windows.
라고 써있음
