php解析cas返回的xml

    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

$str = <<authenticationSuccess[0];var_dump($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！！！

回复讨论(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。

怎么会？

<?php$str = <<<EOT&lt;cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'&gt;    &lt;cas:authenticationSuccess&gt;        &lt;cas:user&gt;zhangjian&lt;/cas:user&gt;        &lt;cas:language&gt;&lt;/cas:language&gt;    &lt;/cas:authenticationSuccess&gt;&lt;/cas:serviceResponse&gt;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);</pre>  <pre class="sycode" name="code">SimpleXMLElement Object(    [authenticationSuccess] =&gt; SimpleXMLElement Object        (            [user] =&gt; zhangjian            [language] =&gt; SimpleXMLElement Object                (                )        ))SimpleXMLElement Object(    [user] =&gt; zhangjian    [language] =&gt; SimpleXMLElement Object        (        ))DOMDocument Object(    [doctype] =&gt;     [implementation] =&gt; (object value omitted)    [documentElement] =&gt; (object value omitted)    [actualEncoding] =&gt;     [encoding] =&gt;     [xmlEncoding] =&gt;     [standalone] =&gt; 1    [xmlStandalone] =&gt; 1    [version] =&gt; 1.0    [xmlVersion] =&gt; 1.0    [strictErrorChecking] =&gt; 1    [documentURI] =&gt; file:///D:/AMP/web/    [config] =&gt;     [formatOutput] =&gt;     [validateOnParse] =&gt;     [resolveExternals] =&gt;     [preserveWhiteSpace] =&gt; 1    [recover] =&gt;     [substituteEntities] =&gt;     [nodeName] =&gt; #document    [nodeValue] =&gt;     [nodeType] =&gt; 9    [parentNode] =&gt;     [childNodes] =&gt; (object value omitted)    [firstChild] =&gt; (object value omitted)    [lastChild] =&gt; (object value omitted)    [previousSibling] =&gt;     [attributes] =&gt;     [ownerDocument] =&gt;     [namespaceURI] =&gt;     [prefix] =&gt;     [localName] =&gt;     [baseURI] =&gt; file:///D:/AMP/web/    [textContent] =&gt;             zhangjian            )</pre> </p> <p class="sougouAnswer">  谢谢唠叨大大，刚刚使用一个方法解决了，不过没有大大的好  <br>  <br>  <pre class="sycode" name="code">$str = <<<EOT&lt;cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'&gt;    &lt;cas:authenticationSuccess&gt;        &lt;cas:user&gt;zhangjian&lt;/cas:user&gt;        &lt;cas:language&gt;&lt;/cas:language&gt;    &lt;/cas:authenticationSuccess&gt;&lt;/cas:serviceResponse&gt;EOT;$str = str_replace('cas:', '', $str);$validateXML = simplexml_load_string($str);$successnode = $validateXML->authenticationSuccess[0];echo (string)$successnode->user;</pre> </p></div><div class="nphpQianMsg"><div class="clear"></div></div><div class="nphpQianSheng"><span>Stellungnahme：</span><div>Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. 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