xml解析报错 attributes() on a non-object 求解
$str = '<?xm
l version="1.0" encoding="UTF-8"?>
<businessdata checkdate=" 2012-04-24 11:11:11 “>
<functioncode>1010</functioncode>
<cardNo>3001060003</cardNo>
<CHOL>4.6</CHOL>
<icpcode>422000</icpcode>
</businessdata>'
$xml = simplexml_load_string( $str );
在试用$xml->attributes()方法获取checkdate（echo $attr['checkdate'];）属性时报
Fatal error: Call to a member function attributes() on a non-object in D:\wamp\www\mchtappv5\App\Lib\Action\Home\TestAction.class.php on line 91
