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PHP xml_set_external_entity_ref_handler() Function

In this chapter you will learn:

  1. Description for PHP xml_set_external_entity_ref_handler() Function
  2. Syntax for PHP xml_set_external_entity_ref_handler() Function
  3. Parameter for PHP xml_set_external_entity_ref_handler() Function
  4. Return for PHP xml_set_external_entity_ref_handler() Function
  5. Example - specifies a function to be called when the parser finds an external entity in the XML document

Description

The xml_set_external_entity_ref_handler() function specifies a function to be called when the parser finds an external entity in the XML document.

Syntax

PHP xml_set_external_entity_ref_handler() Function has the following syntax.

xml_set_external_entity_ref_handler(parser,handler)

Parameter

ParameterIs RequiredDescription
parserRequired.XML parser to use
handlerRequired.A function to be called when the parser finds an external entity

The Function specified by the "handler" parameter must have five parameters:

ParameterIs RequiredDescription
parserRequired.A variable containing the XML parser calling the handler
nameRequired.A variable containing the name of the external entity
baseRequired.Base for resolving the system identifier (system_id) of the external entity. Currently, this is always NULL
system_idRequired.System identifier for the external entity
public_idRequired.Public identifier for the external entity

Return

This function returns TRUE on success, or FALSE on failure.

Example

XML File


<?xml version="1.0" encoding="ISO-8859-1"?>
<Book>// j  a  va2  s.  c  o  m
    <name>PHP</name>
    <name>Java</name>
</Book>

Specifies a function to be called when the parser finds an external entity in the XML document


<?php/* j a v a2s  .  co m*/
$parser=xml_parser_create();

function char($parser,$data){
  echo $data;
}

function ext_ent_handler($parser,$ent){
  echo "$ent \n";
}

xml_set_character_data_handler($parser,"char");
xml_set_external_entity_ref_handler($parser, "ext_ent_handler");
$fp=fopen("test.xml","r");

while ($data=fread($fp,1024)){
  xml_parse($parser,$data,feof($fp)) or 
  die (sprintf("XML Error: %s at line %d", 
  xml_error_string(xml_get_error_code($parser)),
  xml_get_current_line_number($parser)));
}

xml_parser_free($parser);
?>

Next chapter...

What you will learn in the next chapter:

  1. Description for
  2. Syntax for PHP xml_set_notation_decl_handler() Function
  3. Parameter for PHP xml_set_notation_decl_handler() Function
  4. Return for PHP xml_set_notation_decl_handler() Function
  5. Example - specifies a function to be called when the parser finds a notation declaration in the XML document
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