使用 php 使用类名或 id 获取完整的“div”内容
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get complete 'div' content using class name or id using php
提问by user1375126
i got a page source from a file using php and its output is similar to
我使用 php 从文件中获得了一个页面源，其输出类似于
<div class="basic">
<div class="math">
<div class="winner">
<div class="under">
<div class="checker">
<strong>check</strong>
</div>
</div>
</div>
</div>
</div>
from this i need to got only a particular 'div' with whole div and contents inside like below when i give input as 'under'(class name) . anybody suggest me how to do this one using php
由此，当我将输入作为 'under'(class name) 输入时，我只需要一个特定的“div”，其中包含整个 div 和内容，如下所示。有人建议我如何使用 php 来做这件事
<div class="under">
<div class="checker">
<strong>check</strong>
</div>
</div>
回答by snuffn
Try this:
尝试这个：
$html = <<<HTML
<div class="basic">
<div class="math">
<div class="winner">
<div class="under">
<div class="checker">
<strong>check</strong>
</div>
</div>
</div>
</div>
</div>;
HTML;
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$div = $xpath->query('//div[@class="under"]');
$div = $div->item(0);
echo $dom->saveXML($div);
This will output:
这将输出：
<div class="under">
<div class="checker">
<strong>check</strong>
</div>
</div>
回答by Amal Murali
Function to extract the contents from a specific div id from any webpage
从任何网页的特定 div id 中提取内容的功能
The below function extracts the contents from the specified div and returns it. If no divs with the ID are found, it returns false.
下面的函数从指定的 div 中提取内容并返回它。如果未找到具有该 ID 的 div，则返回 false。
function getHTMLByID($id, $html) {
$dom = new DOMDocument;
libxml_use_internal_errors(true);
$dom->loadHTML($html);
$node = $dom->getElementById($id);
if ($node) {
return $dom->saveXML($node);
}
return FALSE;
}
$idis the ID of the <div>whose content you're trying to extract, $htmlis your HTML markup.
$id是<div>您尝试提取其内容的 ID ，$html是您的 HTML 标记。
Usage example:
用法示例：
$html = file_get_contents('http://www.mysql.com/');
echo getHTMLByID('tagline', $html);
Output:
输出：
The world's most popular open source database
回答by pbappia12
I'm not sure what you asking but this might be it
我不确定你问的是什么，但这可能是它
preg_match_all("<div class='under'>(.*?)</div>", $htmlsource, $output);
$output should now contain the inner content of that div
$output 现在应该包含该 div 的内部内容
