Symfony的DomCrawler如何从html源中提取元描述

Question

使用Symfony的DomCrawler如何从html源中提取元描述？ http://symfony.com/doc/current/components/dom_crawler.html

$crawler = new Crawler();
$crawler->addHtmlContent($html->content, 'UTF-8');

$title = $crawler->filter('title')->text();

示例MSN元描述

<meta name="description" content="The new MSN, Your customizable collection of the best in news, sports, entertainment, money, weather, travel, health, and lifestyle, combined with Outlook, Facebook, Twitter, Skype, and more."/>

Answer 1

我假设您正在尝试获取内容属性值,因此请尝试使用

$data = $crawler->filterXpath("//meta[@name='description']")->extract(array('content'));

并循环$data.

Answer 2

$meta_description = $crawler->filter('meta[name="description"]')->eq(0)->attr('content');