查看的返回值getElementsByTagName ，这将是 DOMNodeList 。

同样对于您的问题，您可以执行以下操作：

Also for your problem you could do something like:

$names = array();
foreach ($dom->getElementsByTagName("name") as $nameNode) {
  $names[] = $nameNode->nodeValue;
}

您不必真正检查 getElementsByTagName ，因为它将会是一个DOMNodeList。这样你可以直接在foreach-loop中使用它来分配不需要的变量。

You don't have to actually check the return value of getElementsByTagName, for it will allways be a DOMNodeList. This way you can use it directly in the foreach-loop whithout assigning unneeded variables.

你需要检查的是$ code> $ name的大小，循环后。

What you have to check, is the size of $names, after the loop.