Propper XML to Array

xml2array.php

/**
 * Creates an associative array from XML. XML elements with like named siblings
 * become numeric indexed arrays. Attributes are not retained.
 *
 * Input XML:
 * <Root>
 *   <RequestId>12345</RequestId>
 *   <Users>
 *     <User>
 *       <Name>Ted</Name>
 *     </User>
 *     <User>
 *       <Name>John</Name>
 *     </User>
 *   </Users>
 * </Root>
 *
 * Output Array:
 * [
 *   "Root" => [
 *      "RequestId" => 12345,
 *      "Users" => [
 *        ["Name" => "Ted"]
 *        ["Name" => "John"]
 *      ]
 *   ]
 * ]
 *
 * @param SimpleXMLElement $xml
 * @return array
 */
function xmlIterator(SimpleXMLElement $xml)
{
    // Awis & AWIS namespaces
    $xml->registerXPathNamespace('aws',
        'http://alexa.amazonaws.com/doc/2005-10-05/');
    $xml->registerXPathNamespace('awis',
        'http://awis.amazonaws.com/doc/2005-07-11');
    $arr = [];

    // Check for children
    $xpath = $xml->xpath('*');
    if (count($xpath) > 0) {

        $redundant = false;
        foreach ($xpath as $node) {

            // Check if key exists already
            if(isset($arr[$node->getName()])) {
                // The node name keying becomes redundant when working with arrays
                $redundant = true;

                // Convert to numeric array
                if(!is_array($arr[$node->getName()]) || !isset($arr[$node->getName()][0])) {
                    $tmp = $arr[$node->getName()];
                    $arr[$node->getName()] = [];
                    $arr[$node->getName()][] = $tmp;
                    $arr[$node->getName()][] = xmlIterator($node);
                }

                // Add to existing numeric array
                else if(is_array($arr[$node->getName()])) {
                    $arr[$node->getName()][] = xmlIterator($node);
                }
            } else {
                $arr[$node->getName()] = xmlIterator($node);
            }
        }

        // Check if this a redundantly nested array
        if($redundant && isset($node)) {
            $arr = $arr[$node->getName()];
        }

    } else {
        $arr = trim((string) $xml);
    }

    return $arr;
}