# xml_set_unparsed_entity_decl_handler

(PHP 4, PHP 5, PHP 7)

xml_set_unparsed_entity_decl_handler — Set up unparsed entity declaration handler

### Description

xml_set_unparsed_entity_decl_handler ( resource `$parser` , callable `$handler` ) : bool

Sets the unparsed entity declaration handler function for the XML parser `parser`.

The `handler` will be called if the XML parser encounters an external entity declaration with an NDATA declaration, like the following:

    <!ENTITY <parameter>name</parameter> {<parameter>publicId</parameter> | <parameter>systemId</parameter>}
            NDATA <parameter>notationName</parameter>

See » section 4.2.2 of the XML 1.0 spec for the definition of notation declared external entities.

### Parameters

`parser`

  A reference to the XML parser to set up unparsed entity declaration handler function.

`handler`

  `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 six parameters:

  handler ( resource `$parser` , string `$entity_name` , string `$base` , string `$system_id` , string `$public_id` , string `$notation_name` )
  `parser`
    The first parameter, parser, is a reference to the XML parser calling the handler.
  `entity_name`
    The name of the entity that is about to be defined.
  `base`
    This is the base for resolving the system identifier (`systemId`) of the external entity.Currently this parameter will always be set to an empty string.
  `system_id`
    System identifier for the external entity.
  `public_id`
    Public identifier for the external entity.
  `notation_name`
    Name of the notation of this entity (see xml_set_notation_decl_handler()).

  If a handler function is set to an empty string, or `FALSE`, the handler in question is disabled.

  > Note: Instead of a function name, an array containing an object reference and a method name can also be supplied.

### Return Values

Returns `TRUE` on success or `FALSE` on failure.