PHP xml _set _external _entity _ref _handler () Function
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
| Parameter | Is Required | Description |
|---|---|---|
| parser | Required. | XML parser to use |
| handler | Required. | A function to be called when the parser finds an external entity |
The Function specified by the "handler" parameter must have five parameters:
| Parameter | Is Required | Description |
|---|---|---|
| parser | Required. | A variable containing the XML parser calling the handler |
| name | Required. | A variable containing the name of the external entity |
| base | Required. | Base for resolving the system identifier (system_id) of the external entity. Currently, this is always NULL |
| system_id | Required. | System identifier for the external entity |
| public_id | Required. | 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>// w ww . j a v a2 s .co 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//from ww w . jav a2 s . 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);
?>