请教以下XML字符串要怎么解析得到code和result呢

请问以下XML字符串要如何解析得到code和result呢？
不是为空就是报错：

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$xml = '<?xml version="1.0" encoding="utf-8"?><apiresult xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://tempuri.org/">  <code>0</code>  <result>短信提交成功</result></apiresult>';$xml = iconv('gbk', 'utf-8', $xml);//转了也不行$dom = simplexml_load_string($xml);$result_code = iconv('utf-8', 'gbk', $dom->code);//结果代码$result_info = iconv('utf-8', 'gbk', $dom->result);//结果信息

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