正则表达式 获取xml中的数据解决办法

$s =<<< XML<br />
<Record><br />
<Item Id="1"><Value>20110524</Value><br />
</Item><br />
<Item Id="7"><Value>13.82</Value><br />
</Item><br />
<Item Id="8"><Value>13.94</Value><br />
</Item><br />
<Item Id="9"><Value>13.79</Value><br />
</Item><br />
<Item Id="11"><Value>13.85</Value><br />
</Item><br />
</Record><br />
<Record><Item Id="1"><Value>20110525</Value><br />
</Item><br />
<Item Id="7"><Value>13.82</Value><br />
</Item><br />
<Item Id="8"><Value>13.86</Value><br />
</Item><br />
<Item Id="9"><Value>13.58</Value><br />
</Item><br />
<Item Id="11"><Value>13.60</Value><br />
</Item><br />
</Record><br />
XML;<br />
<br />
$x = simplexml_load_string("<root>$s</root>");<br />
foreach($x->Record as $node) {<br />
  $t = array();<br />
  foreach($node->Item as $v) $t[] = current($v->Value);<br />
  print_r($t);<br />
}<br />

Array<br />
(<br />
    [0] => 20110524<br />
    [1] => 13.82<br />
    [2] => 13.94<br />
    [3] => 13.79<br />
    [4] => 13.85<br />
)<br />
Array<br />
(<br />
    [0] => 20110525<br />
    [1] => 13.82<br />
    [2] => 13.86<br />
    [3] => 13.58<br />
    [4] => 13.60<br />
)<br />
<br />

<br />
$count=preg_match_all('/<Record>(.+?)<\/Record>/is',$str,$m);<br />
echo $count;<br />
<br />
preg_match_all('/<Value>(.+?)<\/Value>/is',$str,$values);<br />
echo "<pre class="brush:php;toolbar:false;">";<br />
print_r($values[1]);<br />
echo "<【本文来自鸿网互联 (http://www.68idc.cn)】/pre>";<br />
/*<br />
2<br />
Array<br />
(<br />
    [0] => 20110524<br />
    [1] => 13.82<br />
    [2] => 13.94<br />
    [3] => 13.79<br />
    [4] => 13.85<br />
    [5] => 20110525<br />
    [6] => 13.82<br />
    [7] => 13.86<br />
    [8] => 13.58<br />
    [9] => 13.60<br />
)<br />
*/<br />