DOMDocument需要搜索具有属性class ＝"something"的元素. [英] DOMDocument need to search for an element that has attribute class="something"

问题描述

在PHP中，我使用的是DOMDocument，我需要搜索一个属性为class ="something"的元素

In PHP I'm using DOMDocument and I need to search for an element that has attribute class="something"

我是DOMDocument的新手(一生都在使用REGEX，所以请帮我:P)

I'm new with DOMDocument (been using REGEX all my life so help me :P)

好吧，我的问题是，我已经使用getElementById找到了一个DOMElement，现在我想查看该元素的子元素，并检索一个具有特定类class ="something"的节点

Ok, my question is, I've found a DOMElement using getElementById, now i want to look inside the children of this element and retrieve a node that has a particular class, class="something"

我该怎么做?

推荐答案

一旦您拥有文档 $ d 的 DOMNode $ n 您想按班级筛选谁的孩子(此搜索是递归的):

Once you have a DOMNode $n for a document $d whose children you want to filter by class you can do (this searches recursively):

$xp = new DOMXpath($d);
foreach ($xp->query('//*[contains(@class, \'classname\')]', $n) as $found) {
    //do sth with $found
}

包含的目的是捕获那些其class属性具有多个值的节点，但这有点太粗糙了.有关更好的解决方案，请参见此处.

The point of contains is to catch those nodes whose class attribute has more than one value, but it's a bit too coarse. See here for a better solution.

这篇关于DOMDocument需要搜索具有属性class ＝"something"的元素.的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！