正则表达式在字符串中查找 Youtube 链接 [重复]答案

【问题标题】：Regex to find Youtube Link in string [duplicate]正则表达式在字符串中查找 Youtube 链接 [重复]
【发布时间】：2015-03-14 04:17:04
【问题描述】：

我有一个这样的字符串：

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard  dummy text ever since the 1500s, https://www.youtube.com/watch?v=7TL02DA5MZM when an unknown printer took a galley of type and scrambled it to make a type

这就是我所拥有的：

preg_match("(?:http://)?(?:www.)?(?:youtube.com|youtu.be)/(?:watch\?)?([^\s]+?)", $content, $m);
    var_dump( $m );

并希望从中提取 youtube 链接。视频ID也可以。

不胜感激！

【问题讨论】：

标签： php regex preg-match

【解决方案1】：

这对你有用，

\S*\bwww\.youtube\.com\S*

\S* 匹配零个或多个非空格字符。

代码是，

preg_match('~\S*\bwww\.youtube\.com\S*~', $str, $matches);

DEMO

我对你原来的正则表达式做了一些更正。

(?:https?://)?(?:www.)?(?:youtube.com|youtu.be)/(?:watch\?v=)?([^\s]+)

DEMO

$str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard  dummy text ever since the 1500s, https://www.youtube.com/watch?v=7TL02DA5MZM when an unknown printer took a galley of type and scrambled it to make a type";
preg_match('~(?:https?://)?(?:www.)?(?:youtube.com|youtu.be)/(?:watch\?v=)?([^\s]+)~', $str, $match);
print_r($match);

输出：

Array
(
    [0] => https://www.youtube.com/watch?v=7TL02DA5MZM
    [1] => 7TL02DA5MZM
)

【讨论】：

我的正则表达式出错：未知修饰符“？”在
查看我的更新。它对我有用。我认为您忘记添加分隔符。
它忽略了 youtu.be (ex.youtu.be/NFD1dtTosQc)
查看我的更新.. 只需将v= 放到上一个可选组中即可。
不要忘记转义正斜杠字符！

【解决方案2】：

(?:https?:\/\/)?www\.youtube\.com\S+?v=\K\S+

您可以通过匹配 youtube url 然后使用 \K 丢弃来获取视频 ID。参见演示。

https://regex101.com/r/tX2bH4/21

$re = "/(?:https?:\\/\\/)?www\\.youtube\\.com\\S+?v=\\K\\S+/i";
$str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, https://www.youtube.com/watch?v=7TL02DA5MZM when an unknown printer took a galley of type and scrambled it to make a type";

preg_match_all($re, $str, $matches);

【讨论】：

几乎没问题。那么youtu.be呢？
@user998163 (?:youtube\.com|youtu\.be) 在 YouTube\.com 中使用它
你能更新你的回放吗？我试过 (?:youtube\.com|youtu\.be) 但没有成功。
@user998163 regex101.com/r/tX2bH4/22

【解决方案3】：

我想出了以下正则表达式：

https?:\/\/(w{3}\.)?youtube\.com\/watch\?.+?(\s|$)

这是我的使用方法：

$str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard  dummy text ever since the 1500s, https://www.youtube.com/watch?v=7TL02DA5MZM when an unknown printer took a galley of type and scrambled it to make a type";

preg_match("/https?:\/\/(w{3}\.)?youtube\.com\/watch\?.+?(\s|$)/", $str, $matches);

$ytube = $matches[0];
$parse = parse_url($ytube);
parse_str($parse["query"], $query);

echo $ytube;
print_r($parse);
print_r($query);

这是项目的输出：

https://www.youtube.com/watch?v=7TL02DA5MZM
Array
(
    [scheme] => https
    [host] => www.youtube.com
    [path] => /watch
    [query] => v=7TL02DA5MZM 
)
Array
(
    [v] => 7TL02DA5MZM 
)

【讨论】：