PHP DOMXPath查询使用元素的innerHTML / nodeValue查找并返回该元素 [英] PHP DOMXPath query using the innerHTML/nodeValue of an element to find and return the element

问题描述

当您要检查元素的innerHTML / nodeValue时，能否请您帮我使用正确的语法？

Can you please help me with the correct syntax to use when you want to check the innerHTML/nodeValue of an element?

名称没有问题年龄位于一个普通的div元素内，下面的不能确定在此放置什么的正确语法是什么？

I have no problem with the Name however the Age is within a plain div element, What is the correct syntax to use in place of "NOT SURE WHAT TO PUT HERE" below.

$ html是互联网

$html is a page from the internet

人名的范围如下：

<span class="fullname">John Smith</span>

人的年龄在div中，例如：

The persons age is in a div like:

<div>Age: 28</div>

我有以下PHP：

<?php
$dom = new DomDocument();
@$dom->loadHTML($html);
$finder = new DOMXPath($dom);

//Full Name
$findName = "fullname";
$queryName = $finder->query("//span[contains(@class, '$findName')]");
$name = $queryName->item(0)->nodeValue;

//Age
$findAge = "Age: ";
$queryAge = $finder->query("//div[NOT SURE WHAT TO PUT HERE]");
$age = substr($queryAge->item(0)->nodeValue, 5);
?>

推荐答案

尝试

$queryAge = $finder->query("//div[starts-with(., '$findAge')]");

我通过 starts-with（）由于存在空格，因此您可能不得不求助于

I've had limited success with starts-with() due to whitespace so you may have to resort to

$queryAge = $finder->query("//div[contains(., '$findAge')]");

如果有可能发现误报（例如，其他带有 Age：的div） ，您可以通过使用更具体的路径（如果已知）来避免这种情况，即

If there's a chance of finding false positives (ie, other divs with "Age: " in them), you might be able to avoid that by using a more specific path (if known), ie

$queryAge = $finder->query("//div[@id='something']//div[contains(., '$findAge')]");

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