如何使用PHP Simple HTML DOM从$_GET项目跟踪的远程页面获取数据？

Question

单击A.html中的链接时：

<tr>
<td class="book"><a class="booklink" ref="../collection?file=book1.pdf">
Good Read
</a>
-Blah blah blah
</td>  
</tr>

将?file=book1.pdf传递给B.html：

<?php
$src = $_GET['file'];
?>

<iframe src="<?php echo $src; ?>" >
</iframe>

问：-如何使用简单的html dom从A.html中检索文本"Good Read-Blah blah“并将其粘贴到B.html的元描述中？(请注意，A.html中的表中有数千个列出的数据)

谢谢。

Answer 1

对load your HTML document和XPath to search it使用DOM。

// note: if the HTML to parse has bad syntax, use: libxml_use_internal_errors(true);

$doc = new DOMDocument;
$doc->loadHTML(file_get_contents('A.html'));
if ($doc === false) {
    throw new RuntimeException('Could not load HTML');
}

$xpath = new DOMXPath($doc);
$xpathResult = $xpath->query("//a[@href = '../collection?file={$_GET['file']}']/..");
if ($xpathResult === false) {
    throw new LogicException('Something went wrong querying the document!');
}

foreach ($xpathResult as $domNode) {
    echo 'Link text: ' . htmlentities($domNode->textContent) . PHP_EOL;
}