Sets the default handler function for the XML parser parser. handler is a string containing the name of a function that must exist when xml_parse() is called for parser.
The function named by handler must accept
two parameters:
handler ( resource parser, string data)
The first parameter, parser, is a reference to the XML parser calling the handler.
The second parameter, data, contains the character data. This may be the XML declaration, document type declaration, entities or other data for which no other handler exists.
If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
TRUE is returned if the handler is set up, FALSE if parser is not a parser.
참고: 함수 이름을 대신해서 객체 레퍼런스와 메쏘드 이름을 가진 배열을 사용할 수 있습니다.