class ArrayToXML

{

/**

* The main function for converting to an XML document.

* Pass in a multi dimensional array and this recrusively loops through and builds up an XML document.

*

* @param array $data

* @param string $rootNodeName – what you want the root node to be – defaultsto data.

* @param SimpleXMLElement $xml – should only be used recursively
* @return string XML

*/

public static function toXml($data, $rootNodeName = ‘data’, $xml=null)

{

// turn off compatibility mode as simple xml throws a wobbly if you don’t.

if (ini_get(‘zend.ze1_compatibility_mode’) == 1)

{

ini_set (‘zend.ze1_compatibility_mode’, 0);

}

if ($xml == null)

{

$xml = simplexml_load_string(“<?xml version=’1.0′ encoding=’utf-8′?><$rootNodeName />”);

}

// loop through the data passed in.

foreach($data as $key => $value)

{

// no numeric keys in our xml please!

if (is_numeric($key))

{

// make string key…

$key = “unknownNode_”. (string) $key;

}

// replace anything not alpha numeric

$key = preg_replace(‘/[^a-z]/i’, ”, $key);

// if there is another array found recrusively call this function

if (is_array($value))

{

$node = $xml->addChild($key);

// recrusive call.

ArrayToXML::toXml($value, $rootNodeName, $node);

}

else

{

// add single node.

$value = htmlentities($value);

$xml->addChild($key,$value);

}

}

// pass back as string. or simple xml object if you want!

return $xml->asXML();

}

}