PHP DOM解析器移动关闭Div标签

Question

here's my code: 这是我的代码：

$myHtml = '
<div class="div-class">
    <p>text</p>

    <p><a href="#">text</a></p>
</div>

<ul class="some-class">
    <li><a href="#" target="_blank" title="something something"><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src=""></a>
    </li>
</ul>
';

$doc = new \DOMDocument();
$doc->loadHTML($myHtml, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new \DOMXPath($doc);
$anchors = $xpath->query("//a[@title='something something']");
$list = $xpath->query("//ul[@class='some-class']")[0];
foreach ($anchors as $a) {
    $list->removeChild($a->parentNode);
}

var_dump($doc->saveHTML());

Essentially, I am trying to remove a list item that contains an anchor tag with a title of 'something something'. 本质上，我试图删除一个列表项，其中包含标题为“某事物”的锚标记。 However, when I save the html after applying the changes, the list moves inside the div tag. 但是，当我在应用更改后保存html时，列表会在div标记内移动。 Why would that occur? 为什么会这样？ Thanks. 谢谢。

Answer 1

loadHTML() tries to correct syntaxis, and it doesn't like the ul element being parentless, so it moves it inside the div . loadHTML()尝试纠正语法，并且它不喜欢ul元素是无父对象的，所以它将它移到div 。 If you wrap it all around a body tag, it'll work correctly. 如果将它全部包裹在body标签周围，它将正常工作。

loadHTML() actually automatically should do the wrapping for you were it necessary, but you set the LIBXML_HTML_NOIMPLIED flag, which disables this. loadHTML()实际上应该自动为你做包装，但是你设置了LIBXML_HTML_NOIMPLIED标志，这会禁用它。

<?php
$myHtml = '
<html>
<body>
<div class="div-class">
    <p>text</p>

    <p><a href="#">text</a></p>
</div>

<ul class="some-class">
    <li><a href="#" target="_blank" title="something something"><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src=""></a>
    </li>
</ul>
</body>
</html>
';

$doc = new \DOMDocument();
$doc->loadHTML($myHtml, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
$xpath = new \DOMXPath($doc);
$anchors = $xpath->query("//a[@title='something something']");
$list = $xpath->query("//ul[@class='some-class']")[0];
foreach ($anchors as $a) {
    $list->removeChild($a->parentNode);
}

var_dump($doc->saveHTML());

Demo 演示

Or, without the LIBXML_HTML_NOIMPLIED flag: 或者，没有LIBXML_HTML_NOIMPLIED标志：

<?php
$myHtml = '
<div class="div-class">
    <p>text</p>

    <p><a href="#">text</a></p>
</div>

<ul class="some-class">
    <li><a href="#" target="_blank" title="something something"><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src="" alt=""></a>
    </li>
    <li><a href="" target="_blank" title=""><img src=""></a>
    </li>
</ul>
';

$doc = new \DOMDocument();
$doc->loadHTML($myHtml, LIBXML_HTML_NODEFDTD);
var_dump (libxml_get_errors());
$xpath = new \DOMXPath($doc);
$anchors = $xpath->query("//a[@title='something something']");
$list = $xpath->query("//ul[@class='some-class']")[0];
foreach ($anchors as $a) {
    $list->removeChild($a->parentNode);
}

var_dump($doc->saveHTML());

Demo 演示

PHP DOM解析器移动关闭Div标签

问题描述

1 个解决方案

解决方案1
3 已采纳 2018-02-14 22:01:30

PHP DOM解析器移动关闭Div标签

问题描述

1 个解决方案

解决方案1 3 已采纳 2018-02-14 22:01:30

解决方案1
3 已采纳 2018-02-14 22:01:30