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.
Note: Instead of a function name, an
array containing an object reference and a method name can also be
supplied.
Php xml set external entity ref handler Function syntax tag
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