PHP - XML to Array

<?php
class XML
{

    /**
     * Converts an XML node to an array
     *
     * @param \SimpleXMLElement $node XML node
     *
     * @return array
     *
     * @note Does not handle namespaces
     */
    public static function toArray(\SimpleXMLElement $node)
    {
        $output = array();

        $attributes = array();
        foreach ($node->attributes() as $key => $val) {
            $attributes[$key] = (string)$val;
        }

        $text = trim((string)$node);

        if (! empty($attributes)) {
            $output['@attributes'] = $attributes;
        }

        if (! empty($text)) {
            $output['_'] = $text;
        }

        $children = array();
        foreach ($node->children() as $childName => $childNode) {
            $children[$childName][] = self::toArray($childNode);
        }

        foreach ($children as $childName => $childList) {
            if (count($childList) === 1) {
                $output[$childName] = $childList[0];
            } else {
                $output[$childName] = $childList;
            }
        }

        return $output;
    }

    public static function toObject(\SimpleXMLElement $node)
    {
        $obj = new \stdClass();
        self::toObject_R($obj, self::toArray($node));

        return $obj;
    }

    private static function toObject_R($obj, $item)
    {
        if (! is_array($item)) {
            return;
        }

        foreach ($item as $key => $val) {
            if (is_array($val)) {
                if (array_keys($val) === range(0, count($val) - 1)) {
                    $q = array();
                    foreach ($val as $i => $v) {
                        $q[$i] = new \stdClass();
                        self::toObject_R($q[$i], $v);
                    }
                    $obj->$key = $q;
                } else {
                    $obj->$key = new \stdClass();
                    self::toObject_R($obj->$key, $val);
                }
            } else {
                $obj->$key = $val;
            }
        }
    }
}