PHP:通过 ID 将 html 内容附加(添加)到现有元素

2022-01-22 00:00:00 append php getelementbyid

我需要使用 PHP 按 ID 搜索元素，然后将 html 内容附加到它.看起来很简单，但我是 php 新手，找不到合适的函数来执行此操作.

I need to search for an element by ID using PHP then appending html content to it. It seems simple enough but I'm new to php and can't find the right function to use to do this.

$html = file_get_contents('http://example.com');
$doc = new DOMDocument(); 
libxml_use_internal_errors(true);
$doc->loadHTML($html);
$descBox = $doc->getElementById('element1');

我只是不知道下一步该怎么做.任何帮助将不胜感激.

I just don't know how to do the next step. Any help would be appreciated.

推荐答案

你也可以这样追加

$html = '
<html>
    <body>
        <ul id="one">
            <li>hello</li>
            <li>hello2</li>
            <li>hello3</li>
            <li>hello4</li>
        </ul>
    </body>
</html>';
libxml_use_internal_errors(true);
$doc = new DOMDocument(); 
$doc->loadHTML($html);
//get the element you want to append to
$descBox = $doc->getElementById('one');
//create the element to append to #element1
$appended = $doc->createElement('li', 'This is a test element.');
//actually append the element
$descBox->appendChild($appended);
echo $doc->saveHTML();

别忘了在最后一行保存HTML

dont forget to saveHTML on the last line

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