Question

我想从URL中读取og:image元标记。我想使用get_meta_tags，但它不返回此元标记的值。

这是什么原因，我该如何解决？

代码

<?php
$tags = get_meta_tags('https://stackoverflow.com/');
?>
<pre>
    <?php
        print_r($tags);
    ?>
</pre>

HTML输入

 <meta property="og:type" content= "website" />
 <meta property="og:url" content="https://stackoverflow.com/"/>
 <meta property="og:site_name" content="Stack Overflow" />
 <meta property="og:image" itemprop="image primaryImageOfPage" content="https://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded" />
 <meta name="twitter:card" content="summary"/>
 <meta name="twitter:domain" content="stackoverflow.com"/>
 <meta name="twitter:title" property="og:title" itemprop="title name" content="Stack Overflow - Where Developers Learn, Share, &amp; Build Careers" />
 <meta name="twitter:description" property="og:description" itemprop="description" content="Stack Overflow | The World’s Largest Online Community for Developers" />

结果

   Array
(
    [description] => Stack Overflow is the largest, most trusted online community for developers to learn, share their programming knowledge, and build their careers.
    [viewport] => width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0
    [twitter:card] => summary
    [twitter:domain] => stackoverflow.com
    [twitter:title] => Stack Overflow - Where Developers Learn, Share, & Build Careers
    [twitter:description] => Stack Overflow | The World’s Largest Online Community for Developers
)

Answer 1

这行不通。

get_meta_tags使用meta标签的name属性填充数组键。

如果您查看试图从中获取此值的页面的HTML，则会看到以下内容：

 <meta property="og:type" content= "website" />
 <meta property="og:url" content="https://stackoverflow.com/"/>
 <meta property="og:site_name" content="Stack Overflow" />
 <meta property="og:image" itemprop="image primaryImageOfPage" content="https://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded" />

如您所见，这些标签都不具有name属性，因此该函数无法将这些值分配给任何键。

您将不得不使用其他方法来获取这些元标记。

`get_meta_tags`没有读og：image

1 个答案: