Convert php array to xml

The web browser is parsing the tags which is why they appear to not be there.

Right click and view source. Or surround the output with <pre> tags.

print '<pre>';
print $xml->asXML();
print '</pre>';

This should work for you:

<?php

    $input_array = array (
                   'name' => 'John Doe',
                   'course' => 'Computer Science',
                   'age' => 'twenty one'
                  );

    $xml = new SimpleXMLElement('<root/>');
    $arr = array_flip($input_array);
    array_walk_recursive($arr, array( $xml, 'addChild'));
                       //^^^ Can't use array_filp directly otherwise: Strict Standards: Only variables should be passed by reference

    print $xml->asXML();

?>

To get a nice formatted output you could do this:

header('Content-type: text/xml');

Output:

<root>
  <name>John Doe</name>
  <course>Computer Science</course>
  <age>twenty one</age>
</root>

a short one:

<?php

$test_array = array (
  'bla' => 'blub',
  'foo' => 'bar',
  'another_array' => array (
    'stack' => 'overflow',
  ),
);
$xml = new SimpleXMLElement('<root/>');
array_walk_recursive($test_array, array ($xml, 'addChild'));
print $xml->asXML();

results in

<?xml version="1.0"?>
<root>
  <blub>bla</blub>
  <bar>foo</bar>
  <overflow>stack</overflow>
</root>

For converting php array to xml refer this doc in that very good solution available