PHP - preg_replace YouTube 嵌入，无论顺序如何 [英] PHP - preg_replace YouTube embed no matter the order
问题描述
我正在尝试从 YouTube 嵌入代码中捕获 3 个元素，但有时这些元素的顺序不同，或者有时嵌入代码包含更多参数.
I'm trying to capture 3 elements from YouTube embed codes but sometimes those elements are not in the same order or sometimes, the embed code contains more parameters.
我想找到一种方法来提取视频 ID、宽度和长度，以便为 AMP 创建 YouTube 集成.
I'd like to find a way to extract the video ID, the width and length in order to create a YouTube integration for AMP.
嵌入示例:
<iframe width="560" height="315" src="https://www.youtube.com/embed/bpcNPHqs4ng" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
应该改成:
<amp-youtube data-videoid="bpcNPHqs4ng" width="560" height="315"
layout="responsive"></amp-youtube>
如果嵌入总是相同的，那将很容易解决，但有时嵌入代码从源开始，有时从宽度开始，...所以无论我需要以何种顺序捕获 ID、宽度和高度.
If the embed was always the same it would be easy to solve but sometimes the embed code starts with the source, sometimes with the width, ... So whatever the order I would need to capture the ID, the width and the height.
我可以用 PHP 中的 preg_replace 来做到这一点吗?
Can I do this with a preg_replace in PHP ?
我试过了:
preg_replace('/<iframe width="([0-9]+)" height="([0-9]+)" src="https://www.youtube.com/embed/([A-Za-z0-9]+)" (.*)></iframe>/', '<amp-youtube data-videoid="$3" width="$1" height="$2" layout="responsive"></amp-youtube>', $article);
$article 包含使用 YouTube 嵌入的整篇文章.
$article contains the whole article in which the YouTube embed is used.
如果 DOM 解析器可以做同样的事情，对我来说也可以，但我对此不太熟悉.
If a DOM parser can do the same, it's also ok for me but I'm less familiar with this.
谢谢
推荐答案
这里有一个 DOMDocument 解决您的问题，使用 DOMXPath 以搜索具有包含 youtube 的 src 属性的 iframe 标记，然后将它们替换为对应的 <amp-youtube> 元素:
Here's a DOMDocument solution to your problem, using DOMXPath to search for iframe tags that have a src attribute that contains youtube, and then replacing them with a corresponding <amp-youtube> element:
$doc = new DOMDocument();
$doc->loadHTML($article, LIBXML_HTML_NODEFDTD);
$xpath = new DOMXPath($doc);
foreach ($xpath->query("//iframe[contains(@src, 'youtube')]") as $youtube) {
// create a new node
$node = $doc->createElement('amp-youtube');
// set attributes
$node->setAttribute('data-videoid', basename(parse_url($youtube->getAttribute('src'), PHP_URL_PATH)));
$node->setAttribute('width', $youtube->getAttribute('width'));
$node->setAttribute('height', $youtube->getAttribute('height'));
$node->setAttribute('layout', 'responsive');
// and now replace the old node
$youtube->parentNode->replaceChild($node, $youtube);
}
echo $doc->saveHTML();
输出(用于我的演示数据):
Output (for my demo data):
<html>
<body>
<div>some text</div>
<iframe name="notyoutube" src="http://example.com"></iframe>
<p>some more text</p>
<amp-youtube data-videoid="bpcNPHqs4ng" width="560" height="315" layout="responsive"></amp-youtube>
<div>one last div</div>
</body>
</html>
这篇关于PHP - preg_replace YouTube 嵌入，无论顺序如何的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
