选择班级名称值

Question

可能重复：
How to extract a node attribute from XML using PHP’s DOM Parser

我有HTML这样的：

<tr class="calendar_row" data-eventid="48256"> 
    ... 
    </tr> 

我只是想选择的价值或data-eventid跨越该网页，但我不知道如何在XPath中做到这一点。可能吗？

Answer 1

您可以使用@来获取属性。

//assume $dom is a DOMDocument 

$finder = new DOMXPath($dom); 
// //tr[@data-eventid] = all tr nodes that have a data-eventid attribute 
// /@data-eventid = the attribute node itself as opposed to the tr node 
$nodes = $finder->query('//tr[@data-eventid]/@data-eventid'); 

foreach($nodes as $node) { 
    echo $node->nodeValue."\n"; // echos your data-eventid value ie. 48256 
}