
/**
 * ChronoFish May 2009
 * www.chronofish.com
 *
 * xml2array will convert an XML document to an array.
 * When attributes is true, resultant array will group by tag and exact-match attributes.
 * When attributes is false, resultant array will group by tag and ignore attributes.
 *
 * The resultant array will be an associative array with tag (or tag + attributues) as the key. Each value
 * will either be an XML2Array array (another associative array), or an array of value.
 *
 * Assumptions:
 * 1. XML is well formed
 * 2. White space is wrapped in CDATA
 ***/
function xml2array($originalXML, $attributes=true)
{
        $xmlArray = array();
        $search = $attributes ? '|<((\S+)(.*))\s*>(.*)|Ums' : '|<((\S+)()).*>(.*)|Ums';
       
        // normalize data
        $xml = preg_replace('|>\s*<|', ">\n<", $originalXML); // one tag per line
        $xml = preg_replace('|<\?.*\?>|', '', $xml);            // remove XML declarations
        $xml = preg_replace('|<(\S+?)(.*)/>|U', '<$1$2>', $xml); //Expand singletons
       
        if (! preg_match_all($search, $xml, $xmlMatches))
                return trim($originalXML);      // bail out - no XML found
               
        foreach ($xmlMatches[1] as $index => $key)
        {
                if (! isset($xmlArray[$key])) $xmlArray[$key] = array();       
                $xmlArray[$key][] = xml2array($xmlMatches[4][$index], $attributes);
        }
        return $xmlArray;
}