仅获取DOM xPath查询的第一个结果

Question

Let's say I have this code:

$dom = new DOMDocument();
@$dom->loadHTMLFile('sample.html');
$xp = new DOMXPath($dom);
$result = $xp->query("//input[@id='honey']");

How do I get the content of the attribute value of the first result only, since I'm only expecting one result (without using a foreach loop). I tried var_dump -ing the result but it can't. I also tried current($result)->getAttribute('value') but not luck.

Answer 1

您可以通过以下方法访问它：

$value = $result->item(0)->attributes()->getNamedItem("value")->nodeValue;

Answer 2

Just evaluate this XPath expression :

(//input[@id='honey'])[1]/@value

This selects the attribute value of the first input element in the XML document, the string value of whose id attribute is "honey" .

If you want to get not the value attribute, but its string value, use :

string((//input[@id='honey'])[1]/@value)