PHP xml_set_element_handler() Function

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# PHP xml_set_element_handler() Function

Complete PHP XML Reference

## Definition and Usage

The xml_set_element_handler() function specifies functions to be called at the start and end of an element in the XML document.

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

## Syntax

xml_set_element_handler(parser,start,end)

Parameter | Description
--- | ---
parser | Required. Specifies XML parser to use
start | Required. Specifies a function to be called at the start of an element
end | Required. Specifies a function to be called at the end of an element

The Function specified by the "start" parameter must have three 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 elements, that triggers this function, from the XML file as a string
data | Required. Specifies an array containing the elements attributes from the XML file as a string

The Function specified by the "end" parameter must have two 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 elements, that triggers this function, from the XML file as a string

## Tips and Notes

Note: The start and end parameters can also be an array containing an object reference and a method name.

## Example

<?php
$parser=xml_parser_create();
function start($parser,$element_name,$element_attrs)
{
switch($element_name)
{
case "NOTE":
echo "-- Note --<br />";
break;
case "TO":
echo "To: ";
break;
case "FROM":
echo "From: ";
break;
case "HEADING":
echo "Heading: ";
break;
case "BODY":
echo "Message: ";
}
}
function stop($parser,$element_name)
{
echo "<br />";
}
function char($parser,$data)
{
echo $data;
}
xml_set_element_handler($parser,"start","stop");
xml_set_character_data_handler($parser,"char");
$fp=fopen("test.xml","r");
while ($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);
?>

The output of the code above will be:

-- Note --
To: Tove
From: Jani
Heading: Reminder
Message: Don't forget me this weekend!

Complete PHP XML Reference

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