xml转换成数组的有关问题

xml转换成数组的问题
现有如下xml:

XML code

<!--

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-->
<root>
<rows>
<errmsg text=""></errmsg>
<retvalue text="true"></retvalue>
</rows>
<records>
<productno text="000321"></productno>
<billno text=""></billno>
<orderno text="D004410439"></orderno>
<out_trade_no text="100001"></out_trade_no>
<plcprem text="0.0"></plcprem>
<orderprem text="50.0"></orderprem>
<commision text="0.0"></commision>
</records>
....
<root>

</root></root>

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PHP code

<!--

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-->
Array
(
    [rows] => Array
        (
            [errMsg] => 
            [retValue] => true
        )
    [records] => Array
        (
            [productno] =>000321
            [billno] =>
            [orderno] =>D004410439
            [out_trade_no] => 100001
            [plcprem] =>0.0
            [orderprem] =>50.0
            [commision] =>0.0
        )
        .....
)

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PHP code

$s =
<rows>
<errmsg text=""></errmsg>
<retvalue text="true"></retvalue>
</rows>
<records>
<productno text="000321"></productno>
<billno text=""></billno>
<orderno text="D004410439"></orderno>
<out_trade_no text="100001"></out_trade_no>
<plcprem text="0.0"></plcprem>
<orderprem text="50.0"></orderprem>
<commision text="0.0"></commision>
</records>

XML;
$obj = simplexml_load_string($s);
$r = array();
foreach($obj as $name=>$nodes) {
  foreach($nodes as $k=>$v) {
    $t = (array)$v->attributes()->text;
    $r[$name][$k] = $t[0];
  }
}
print_r($r);
<br><font color="#e78608">------解决方案--------------------</font><br>

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PHP code
$s =









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