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PHP xml_set_element_handler() Function


PHP XML Reference 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!


PHP XML Reference Complete PHP XML Reference

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