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PHP Quiz PHP CertificatePHP xml_set_external_entity_ref_handler() Function
Complete PHP XML Reference
Definition and Usage
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.
This function returns TRUE on success, or FALSE on failure.
Syntax
xml_set_external_entity_ref_handler(parser,handler)
| Parameter | Description |
|---|---|
| parser | Required. Specifies XML parser to use |
| handler | Required. Specifies a function to be called when the parser finds an external entity |
The Function specified by the "handler" parameter must have five parameters:
| Parameter | Description |
|---|---|
| parser | Required. Specifies a variable containing the XML parser calling the handler |
| name | Required. Specifies a variable containing the name of the external entity |
| base | Required. Specifies the base for resolving the system identifier (system_id) of the external entity. Currently, this is always NULL |
| system_id | Required. Specifies the system identifier for the external entity |
| public_id | Required. Specifies the public identifier for the external entity |
Tips and Notes
Note: The handler parameter can also be an array containing an object reference and a method name.
Example
<?php
$parser=xml_parser_create();
function char($parser,$data)
{
echo $data;
}
function ext_ent_handler($parser,$ent,$base,$sysID,$pubID)
{
echo "$ent<br />";
echo "$sysID<br />";
echo "$pubID<BR />";
}
xml_set_character_data_handler($parser,"char");
xml_set_external_entity_ref_handler($parser, "ext_ent_handler");
$fp=fopen("test.xml","r");
while ($data=fread($fp,4096))
{
xml_parse($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);
?>
$parser=xml_parser_create();
function char($parser,$data)
{
echo $data;
}
function ext_ent_handler($parser,$ent,$base,$sysID,$pubID)
{
echo "$ent<br />";
echo "$sysID<br />";
echo "$pubID<BR />";
}
xml_set_character_data_handler($parser,"char");
xml_set_external_entity_ref_handler($parser, "ext_ent_handler");
$fp=fopen("test.xml","r");
while ($data=fread($fp,4096))
{
xml_parse($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);
?>
Complete PHP XML Reference
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