为什么PHP XPath找不到表格元素，即使Firefox显示它们存在？ [英] Why doesn't PHP XPath find table elements even though Firefox shows they exist?

问题描述

我在web scrape中试图拉一个精确的表格。
使用cURL将页面拉入$ html，成功了。

I am trying to pull an exact table during a "web scrape." Used cURL to pull page into $html, which succeeds fine.

使用Firebug获取所需表格的确切XPATH。

Used Firebug to get exact XPATH to the table needed.

代码如下：

$dom = new DOMDocument($html);
$dom->loadHTML($html);

$xpath = new DOMXpath($dom);
$summary = $xpath->evaluate('/html/body/table[5]/tbody/tr/td[3]/table/tbody/tr[8]/td/table');
echo "Summary Length: " . $summary->length;

执行时，$ summary->长度始终为零。它不拉那个表节点。

When executed, $summary->length is always zero. It doesn't pull that table node.

任何想法？

推荐答案

p> Firefox可以在没有它们的表中插入virtual tbody 元素。这些元素是否存在于原始文件中？

Firefox is liable to insert "virtual" tbody elements into tables that don't have them; do those elements exist in the original file?

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