xml2json
function xml2json($url)
{
    $fileContents= file_get_contents($url);
    $fileContents = str_replace(array("\n", "\r", "\t"), '', $fileContents);
    $fileContents = trim(str_replace('"', "'", $fileContents));
    $simpleXml = simplexml_load_string($fileContents);
    $json = json_encode($simpleXml);
    return $json;
}