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我想从html中抓取一些元素,但是我无法根据需要刮取数据。Php Dom文档结果错误
HTML
<div class="opinions">
<ul>
<li>
<div class="imgcontainers">
<a href="domainname.com" title="title"> `<img width="160" src="image.jpg" />`
</a>
</div>
<p class="caption">
<a href="domainname.com" class="head">asdfad</a>
<span>November 03, 2015 09:29 This is article title</span>
</p>
</li>
</ul>
</div>
$dom = new DOMDocument();
$classname = 'opinions';
$html = get_page($url);
@$dom->loadHTML($html);
$dom->preserveWhiteSpace = false;
$xpath = new DOMXPath($dom);
$articles = $xpath->query("//*[@class='" . $classname . "']");
$p = $articles->getElementsByTagName('a');
$div = $articles->getElementsByTagName('div');
foreach($p as $value){
$title = $value->getAttribute("href");
echo $title;
}
当我运行该脚本,我得到这个错误“调用未定义的方法的DOMNodeList ::的getElementsByTagName()”
我究竟需要的是,我需要每一个HREF链接和img src路径(如果有)和span文本值。请建议您的建议如何实现这一点。