Array to XML helper.

ArrayToXmlHelper.php

<?php

class ArrayHelper {
    const PARENT_NODE = "<return></return>";

    private function __construct() { }
	
    public static function arrayToXml($array, &$xml) {
        foreach($array as $key => $value) {
	    if(is_array($value)) {
	        if (is_numeric($key)) {
		    $subnode = $xml; 
                } else {
	            $key = strtolower($key);
                    $subnode = $xml->addChild("$key");
                }
				
	        self::arrayToXml($value, $subnode);
            }
	    else {
	        if ($value != "")
                    $value = html_entity_decode($value);

                $key = is_numeric($key) ? "item" : strtolower($key);

                self::safeAddChild($xml, "$key", "$value");
            }
        }
    }
    
    public static function &safeAddChild(&$sxml, $name, $value) {
        $safeValue = preg_replace('/&(?!\w+;)/', '&amp;', $value);
        
        return $sxml->addChild($name, $safeValue);
    }
	
    public static function xmlJoin($root, $append) {
        if ($append) {
	    if (strlen(trim((string) $append)) == 0) {
	        $xml = $root->addChild($append->getName());
	        
	        foreach($append->children() as $child) {
		    xml_join($xml, $child);
	        }
            } else {
	        $xml = $root->addChild($append->getName(), (string) $append);
	    }
	    
	    foreach($append->attributes() as $n => $v) {
	        $xml->addAttribute($n, $v);
	    }
        }
    }
	
    public static function executeArrayToXml(array $object, $typePlural = 'orders') {
        $array = self::addParentTo($typePlural, ($object);
	$xml = new \SimpleXMLElement("<?xml version=\"1.0\"?>" . self::PARENT_NODE);
		
	self::arrayToXml($array, $xml);
		
        return $xml->asXML();
    }
	
    public static function addParentTo($parent, $array) {
        return array($parent => $array);
    }
	
    public static function in_arrayInsensitive($needle, $haystack) {
        return in_array($needle, array_map('strtoupper', $haystack));
    }
}

?>