从html中提取表格数据,从HTML表格列中提取数据

鉴于一个叫做xpathTables.html的HTML文档是这样的：

DATA

Data_Text

Data	Data_Text_1	Data_Text_2

DATA

Data_Text

而这个PHP脚本：

$link = "xpathTables.html";

$html = file_get_contents($link);

$doc = new DOMDocument();

$doc->loadHTML($html);

$xpath = new DOMXPath($doc);

$tables = $doc->getElementsByTagName('table');

$nodes = $xpath->query('.//tbody/tr/td/a/b', $tables->item(0));

var_dump($nodes->item(0)->nodeValue);

$nodes = $xpath->query('.//tbody/tr/td[@cla