php">    public function changeXml($res)
    {
        $xml = simplexml_load_string($res);
        $xmljson = json_encode($xml);
        $xml = json_decode($xmljson, true);
        return $xml;
    }
    //Xml转数组
    public function xmlArr($xml)
    {
        if ($xml == '') return '';
        libxml_disable_entity_loader(true);
        $arr = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $arr;
    }

    public function extractXml($xml) {
        $data = (array)simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
        return array_change_key_case($data, CASE_LOWER);
    }

    public function toJson($xmlstr){
        $xmlstr = preg_replace('/\sxmlns="(.*?)"/', ' _xmlns="${1}"', $xmlstr);
        $xmlstr = preg_replace('/<(\/)?(\w+):(\w+)/', '<${1}${2}_${3}', $xmlstr);
        $xmlstr = preg_replace('/(\w+):(\w+)="(.*?)"/', '${1}_${2}="${3}"', $xmlstr);
        $xmlobj = simplexml_load_string($xmlstr);
        $arr = json_decode(json_encode($xmlobj), true);
        return $arr;
    }