查找PHP，DOM，XPath中的节点数 [英] Finding number of nodes in PHP, DOM, XPath

问题描述

我正在将HTML加载到DOM中，然后使用PHP中的XPath进行查询。我目前的问题是如何找出已经做了几场比赛，一旦确定，我该如何访问？

我目前有这个肮脏的解决方案：

  $ i = 0; 
 foreach（$ nodes as $ node）{
 echo $ dom-> savexml（$ nodes-> item（$ i））; 
 $ i ++; 
} 
  

有没有一个更清洁的解决方案来查找节点数，我已经尝试了（），但这不起作用。

解决方案

您尚未发布任何与 $节点所以我假设你正在使用DOMXPath和query（），或者至少有一个 DOMNodeList 。

DOMXPath :: query（）返回一个具有长度成员的DOMNodeList。您可以通过（给出您的代码）访问它：

  $ nodes-> length 
  

I am loading HTML into DOM and then querying it using XPath in PHP. My current problem is how do I find out how many matches have been made, and once that is ascertained, how do I access them?

I currently have this dirty solution:

$i = 0;  
foreach($nodes as $node) {  
    echo $dom->savexml($nodes->item($i));  
    $i++;
}

Is there a cleaner solution to find the number of nodes, I have tried count(), but that does not work.

解决方案

You haven't posted any code related to $nodes so I assume you are using DOMXPath and query(), or at the very least, you have a DOMNodeList.
DOMXPath::query() returns a DOMNodeList, which has a length member. You can access it via (given your code):

$nodes->length

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