PHPRegisterXPathNamespace—未知来源的XML前缀-PHPRegisterXPathNamespace-XMLPrefixofUnknownOrigin

I'm pretty new to PHP/XPath here. I'm using SimpleXML and XPath in PHP, traversing XML with namespaces.

我对PHP/XPath非常熟悉。我在PHP中使用SimpleXML和XPath，使用名称空间遍历XML。

My question is concerning the 'prefix' parameter in the registerXPathNamespace function.
I have two xmlns in my xml feed; however, I'm uncertain as to how to use the function in this case.
When I run this code, I get the following error msg:

我的问题是关于registerXPathNamespace函数中的“前缀”参数。我的xml提要中有两个xmlns;但是，我不确定在这种情况下如何使用这个函数。当我运行这个代码时，我得到以下错误msg:

Undefined offset: 0

My XML cannot be changed in any way. Please see the code, below. Thanks for any leads.

我的XML不能以任何方式改变。请看下面的代码。谢谢你的任何线索。

PHP code:

PHP代码:

registerXPathNamespace('a','http://www.digitalmeasures.com/schema/data');//
//below, as the 'dmd' prefix is in the xml, I've included it here.
$simplexml->registerXPathNamespace('dmd','http://www.digitalmeasures.com/schema/data-metadata');
//

$myDataObjects2 = $simplexml->xpath('//Record/INTELLCONT[@id="14"]/CONTYPE')[0];
//$myDataObjects2 = $simplexml->xpath('//Record/INTELLCONT/CONTYPE')[0];
echo $myDataObjects2;
?>

The XML:

XML:

    
        
        
            Author Content
            
            Revised
            Accepted
        
    

2 个解决方案

$simplexml->registerXPathNamespace('a','http://www.digitalmeasures.com/schema/data');

//a:Record/a:INTELLCONT[@id="14"]/a:CONTYPE

$simplexml->registerXPathNamespace('a','http://www.digitalmeasures.com/schema/data');

$myDataObjects2 = $simplexml->xpath('//a:Record/a:INTELLCONT[@id="14"]/a:CONTYPE')[0];