使用php进行cas验证时，对方返回这么一段xml
<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
<cas:authenticationSuccess>
<cas:user>zhangjian</cas:user>
<cas:language></cas:language>
</cas:authenticationSuccess>
</cas:serviceResponse>
于是使用php相关函数进行解析
$str = <<<EOT
<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
<cas:authenticationSuccess>
<cas:user>zhangjian</cas:user>
<cas:language></cas:language>
</cas:authenticationSuccess>
</cas:serviceResponse>
EOT;
/*
$validateXML = simplexml_load_string($str);print_r($validateXML);
$successnode = $validateXML->authenticationSuccess[0];
var_dump($successnode);
*/
$xml = new DOMDocument();
$xml -> loadXML($str);
var_dump($xml);
结果都解析不出来，哪位朋友遇到过请指点下，不甚感激！！！
------解决方案--------------------
SimpleXML也是PHP5后提供的一套简单易用的xml工具集，
不过它不适用于包含namespace（命名空间）的xml。
------解决方案--------------------
怎么会？
<xmp>
<?php
$str = <<<EOT
<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
<cas:authenticationSuccess>
<cas:user>zhangjian</cas:user>
<cas:language></cas:language>
</cas:authenticationSuccess>
</cas:serviceResponse>
EOT;
$validateXML = simplexml_load_string($str, null, 0, 'cas', true);
print_r($validateXML);
$successnode = $validateXML->authenticationSuccess[0];
print_r($successnode);
$xml = new DOMDocument();
$xml -> loadXML($str);
print_r($xml);
SimpleXMLElement Object
(
[authenticationSuccess] => SimpleXMLElement Object
(
[user] => zhangjian
[language] => SimpleXMLElement Object
(
)
)
)
SimpleXMLElement Object
(
[user] => zhangjian
[language] => SimpleXMLElement Object
(
)
)
DOMDocument Object
(
[doctype] =>
[implementation] => (object value omitted)
[documentElement] => (object value omitted)
[actualEncoding] =>
[encoding] =>
[xmlEncoding] =>
[standalone] => 1
[xmlStandalone] => 1
[version] => 1.0
[xmlVersion] => 1.0
[strictErrorChecking] => 1
[documentURI] => file:///D:/AMP/web/
[config] =>
[formatOutput] =>
[validateOnParse] =>
[resolveExternals] =>
[preserveWhiteSpace] => 1
[recover] =>
[substituteEntities] =>
[nodeName] => #document
[nodeValue] =>
[nodeType] => 9
[parentNode] =>
[childNodes] => (object value omitted)
[firstChild] => (object value omitted)
[lastChild] => (object value omitted)
[previousSibling] =>
[attributes] =>
[ownerDocument] =>
[namespaceURI] =>
[prefix] =>
[localName] =>
[baseURI] => file:///D:/AMP/web/
[textContent] =>
zhangjian