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我一直在研究 Youtube 和 Vimeo 嵌入代码解析器,我试图通过使用正则表达式来解决问题。

我发现了两种模式,它们正在使用 eregi() 函数,但不幸的是不适用于 preg_match()。给出“分隔符不能是字母数字或反斜杠”错误。

如何将这些模式从 POSIX 转换为 PCRE?

对于 Youtube;

\/v\/(.{11})|\/embed\/(.{11})

对于 Vimeo;

player\.vimeo\.com\/video/([0-9]*)"
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2 回答 2

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我发现这个对我帮助开发的网站很有帮助。感谢并感谢ridgerunner

// Linkify youtube URLs which are not already links.
function linkifyYouTubeURLs($text) {
    $text = preg_replace('~
        # Match non-linked youtube URL in the wild. (Rev:20111012)
        https?://         # Required scheme. Either http or https.
        (?:[0-9A-Z-]+\.)? # Optional subdomain.
        (?:               # Group host alternatives.
          youtu\.be/      # Either youtu.be,
        | youtube\.com    # or youtube.com followed by
          \S*             # Allow anything up to VIDEO_ID,
          [^\w\-\s]       # but char before ID is non-ID char.
        )                 # End host alternatives.
        ([\w\-]{11})      # $1: VIDEO_ID is exactly 11 chars.
        (?=[^\w\-]|$)     # Assert next char is non-ID or EOS.
        (?!               # Assert URL is not pre-linked.
          [?=&+%\w]*      # Allow URL (query) remainder.
          (?:             # Group pre-linked alternatives.
            [\'"][^<>]*>  # Either inside a start tag,
          | </a>          # or inside <a> element text contents.
          )               # End recognized pre-linked alts.
        )                 # End negative lookahead assertion.
        [?=&+%\w-]*        # Consume any URL (query) remainder.
        ~ix', 
        '<a href="http://www.youtube.com/watch?v=$1">YouTube link: $1</a>',
        $text);
    return $text;
}

您应该能够从那里删除您需要的内容,并且它可以处理所有样式的 YouTube 链接。Vimeo 从那里开始不应该太难。

于 2012-05-21T17:43:03.743 回答
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这是给 youtube 的:$pattern = '/\/v\/(.{11})|\/embed\/(.{11})/';

那是给 Vimeo 的:$pattern = '/player\.vimeo\.com\/video\/([0-9]*)/';

使用 PCRE 时,请确保将表达式括在/expression/(斜杠)中,并转义所有/. 我注意到你有时会,有时你不会...

于 2012-05-21T17:58:39.367 回答