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# xml_set_external_entity_ref_handler

(PHP 3>= 3.0.6, PHP 4 , PHP 5)

xml_set_external_entity_ref_handler -- Set up external entity reference handler

## Description

bool xml_set_external_entity_ref_handler ( resource parser, callback handler)

Sets the external entity reference 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 five parameters, and should return an integer value. If the value returned from the handler is `FALSE` (which it will be if no value is returned), the XML parser will stop parsing and xml_get_error_code() will return XML_ERROR_EXTERNAL_ENTITY_HANDLING. `handler` ( resource parser, string open_entity_names, string base, string system_id, string public_id)

`parser`

  The first parameter, `parser`, is a reference to the XML parser calling the handler.

`open_entity_names`

  The second parameter, `open_entity_names`, is a space-separated list of the names of the entities that are open for the parse of this entity (including the name of the referenced entity).

`base`

  This is the base for resolving the system identifier (`system_id`) of the external entity. Currently this parameter will always be set to an empty string.

`system_id`

  The fourth parameter, `system_id`, is the system identifier as specified in the entity declaration.

`public_id`

  The fifth parameter, `public_id`, is the public identifier as specified in the entity declaration, or an empty string if none was specified; the whitespace in the public identifier will have been normalized as required by the XML spec.

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.

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