PHP XML和数组互相转换详解

//数组转XML  function arrayToXml($arr)  {    $xml = "<xml>";    foreach ($arr as $key=>$val)    {      if (is_numeric($val)){        $xml.="<".$key.">".$val."</".$key.">";      }else{         $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";      }    }    $xml.="</xml>";    return $xml;  }  //将XML转为array  function xmlToArray($xml)  {      //禁止引用外部xml实体    libxml_disable_entity_loader(true);    $values = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);        return $values;  }