使用 preg_match 解析 youtube 视频 ID [英] parse youtube video id using preg_match

问题描述

我正在尝试使用 preg_match 解析 youtube 网址的视频 ID.我在这个网站上发现了一个似乎有效的正则表达式；

I am attempting to parse the video ID of a youtube URL using preg_match. I found a regular expression on this site that appears to work;

(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=[0-9]/)[^&
]+|(?<=v=)[^&
]+

如图所示:

我的 PHP 如下，但它不起作用(给出未知修饰符 '[' 错误)...

My PHP is as follows, but it doesn't work (gives Unknown modifier '[' error)...

<?
 $subject = "http://www.youtube.com/watch?v=z_AbfPXTKms&NR=1";

 preg_match("(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=[0-9]/)[^&
]+|(?<=v=)[^&
]+", $subject, $matches);

 print "<pre>";
 print_r($matches);
 print "</pre>";

?>

干杯

推荐答案

这个正则表达式从我能找到的所有各种 URL 中获取 ID...可能还有更多，但我无法在任何地方找到它们的参考.如果您遇到不匹配的问题，请在 URL 上留言，我会尝试更新正则表达式以匹配您的 URL.

This regex grabs the ID from all of the various URLs I could find... There may be more out there, but I couldn't find reference of them anywhere. If you come across one this doesn't match, please leave a comment with the URL, and I'll try and update the regex to match your URL.

if (preg_match('%(?:youtube(?:-nocookie)?.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu.be/)([^"&?/s]{11})%i', $url, $match)) {
    $video_id = $match[1];
}

以下是此正则表达式匹配的 URL 示例:(在给定 URL 之后可以有更多内容将被忽略)

Here is a sample of the URLs this regex matches: (there can be more content after the given URL that will be ignored)

• http://youtu.be/dQw4w9WgXcQ ...
• http://www.youtube.com/embed/dQw4w9WgXcQ ...
• http://www.youtube.com/watch?v=dQw4w9WgXcQ...
• http://www.youtube.com/?v=dQw4w9WgXcQ ...
• http://www.youtube.com/v/dQw4w9WgXcQ ...
• http://www.youtube.com/e/dQw4w9WgXcQ ...
• http://www.youtube.com/user/username#p/u/11/dQw4w9WgXcQ ...
• http://www.youtube.com/sandalsResorts#p/c/54B8C800269D7C1B/0/dQw4w9WgXcQ ...
• http://www.youtube.com/watch?feature=player_embedded&v=dQw4w9WgXcQ ...
• http://www.youtube.com/?feature=player_embedded&v=dQw4w9WgXcQ ...

• http://youtu.be/dQw4w9WgXcQ ...
• http://www.youtube.com/embed/dQw4w9WgXcQ ...
• http://www.youtube.com/watch?v=dQw4w9WgXcQ ...
• http://www.youtube.com/?v=dQw4w9WgXcQ ...
• http://www.youtube.com/v/dQw4w9WgXcQ ...
• http://www.youtube.com/e/dQw4w9WgXcQ ...
• http://www.youtube.com/user/username#p/u/11/dQw4w9WgXcQ ...
• http://www.youtube.com/sandalsResorts#p/c/54B8C800269D7C1B/0/dQw4w9WgXcQ ...
• http://www.youtube.com/watch?feature=player_embedded&v=dQw4w9WgXcQ ...
• http://www.youtube.com/?feature=player_embedded&v=dQw4w9WgXcQ ...

它也适用于具有上述相同选项的 youtube-nocookie.com URL.

It also works on the youtube-nocookie.com URL with the same above options.

它还将从嵌入代码(iframe 和对象标签)中的 URL 中提取 ID

It will also pull the ID from the URL in an embed code (both iframe and object tags)

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