정규식을 사용하여 문자열에서 모든 YouTube 동영상 ID를 찾으려면 어떻게하나요?

정규식을 사용하여 문자열에서 모든 YouTube 동영상 ID를 찾으려면 어떻게하나요?

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사용자가 무엇이든 쓸 수있는 텍스트 필드가 있습니다.

예를 들면 :

Lorem Ipsum은 단순히 더미 텍스트입니다. 인쇄 및 조판 업계의 http://www.youtube.com/watch?v=DUQi_R4SgWo . Lorem Ipsum은 알려지지 않은 프린터가 유형의 갤리선을 가져 와서 유형 견본 책자를 만들기 위해 스크램블 한 1500 년대 이래로 업계의 표준 더미 텍스트였습니다. 그것은 5 세기뿐만 아니라 본질적으로 변하지 않은 전자 조판으로의 도약에도 살아 남았습니다. http://www.youtube.com/watch?v=A_6gNZCkajU&feature=relmfu 1960 년대에 Lorem Ipsum 구절이 포함 된 Letraset 시트가 출시되면서 대중화되었으며 최근에는 Lorem Ipsum 버전을 포함한 Aldus PageMaker와 같은 데스크톱 출판 소프트웨어로 대중화되었습니다.

이제 그것을 파싱하고 모든 YouTube 동영상 URL과 ID를 찾고 싶습니다.

어떻게 작동하는지 아십니까?

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YouTube 동영상 URL은 다양한 형식으로 표시 될 수 있습니다.

• 최신 짧은 형식 : http://youtu.be/NLqAF9hrVbY
• iframe : http://www.youtube.com/embed/NLqAF9hrVbY
• iframe (보안) : https://www.youtube.com/embed/NLqAF9hrVbY
• 개체 매개 변수 : http://www.youtube.com/v/NLqAF9hrVbY?fs=1&hl=en_US
• 개체 포함 : http://www.youtube.com/v/NLqAF9hrVbY?fs=1&hl=en_US
• 손목 시계: http://www.youtube.com/watch?v=NLqAF9hrVbY
• 사용자 : http://www.youtube.com/user/Scobleizer#p/u/1/1p3vcRhsYGo
• ytscreeningroom : http://www.youtube.com/ytscreeningroom?v=NRHVzbJVx8I
• 무엇이든 / 무엇이든! : http://www.youtube.com/sandalsResorts#p/c/54B8C800269D7C1B/2/PPS-8DMrAn4
• 임의 / 하위 도메인 / 너무 : http://gdata.youtube.com/feeds/api/videos/NLqAF9hrVbY
• 더 많은 매개 변수 : http://www.youtube.com/watch?v=spDj54kf-vY&feature=g-vrec
• 쿼리에 점이있을 수 있습니다. http://www.youtube.com/watch?v=spDj54kf-vY&feature=youtu.be
• nocookie 도메인 : http://www.youtube-nocookie.com

다음은 이러한 각 URL 형식과 일치하고 링크로 변환하는 주석 처리 된 정규식이있는 PHP 함수입니다 (아직 링크가 아닌 경우).

// Linkify youtube URLs which are not already links.
function linkifyYouTubeURLs($text) {
    $text = preg_replace('~(?#!js YouTubeId Rev:20160125_1800)
        # Match non-linked youtube URL in the wild. (Rev:20130823)
        https?://          # Required scheme. Either http or https.
        (?:[0-9A-Z-]+\.)?  # Optional subdomain.
        (?:                # Group host alternatives.
          youtu\.be/       # Either youtu.be,
        | youtube          # or youtube.com or
          (?:-nocookie)?   # youtube-nocookie.com
          \.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;
}

; // $ YouTubeId를 종료합니다.

그리고 다음은 똑같은 정규식을 가진 JavaScript 버전입니다 (주석이 제거됨).

// Linkify youtube URLs which are not already links.
function linkifyYouTubeURLs(text) {
    var re = /https?:\/\/(?:[0-9A-Z-]+\.)?(?:youtu\.be\/|youtube(?:-nocookie)?\.com\S*?[^\w\s-])([\w-]{11})(?=[^\w-]|$)(?![?=&+%\w.-]*(?:['"][^<>]*>|<\/a>))[?=&+%\w.-]*/ig;
    return text.replace(re,
        '<a href="http://www.youtube.com/watch?v=$1">YouTube link: $1</a>');
}

노트:

• URL의 VIDEO_ID 부분은 유일한 캡처 그룹 인에서 캡처 $1됩니다.
• If you know that your text does not contain any pre-linked URLs, you can safely remove the negative lookahead assertion which tests for this condition (The assertion beginning with the comment: "Assert URL is not pre-linked.") This will speed up the regex somewhat.
• The replace string can be modified to suit. The one provided above simply creates a link to the generic "http://www.youtube.com/watch?v=VIDEO_ID" style URL and sets the link text to: "YouTube link: VIDEO_ID".

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Edit 2011-07-05: Added - hyphen to ID char class

Edit 2011-07-17: Fixed regex to consume any remaining part (e.g. query) of URL following YouTube ID. Added 'i' ignore-case modifier. Renamed function to camelCase. Improved pre-linked lookahead test.

Edit 2011-07-27: Added new "user" and "ytscreeningroom" formats of YouTube URLs.

Edit 2011-08-02: Simplified/generalized to handle new "any/thing/goes" YouTube URLs.

Edit 2011-08-25: Several modifications:

• Added a Javascript version of: linkifyYouTubeURLs() function.
• Previous version had the scheme (HTTP protocol) part optional and thus would match invalid URLs. Made the scheme part required.
• Previous version used the \b word boundary anchor around the VIDEO_ID. However, this will not work if the VIDEO_ID begins or ends with a - dash. Fixed so that it handles this condition.
• Changed the VIDEO_ID expression so that it must be exactly 11 characters long.
• The previous version failed to exclude pre-linked URLs if they had a query string following the VIDEO_ID. Improved the negative lookahead assertion to fix this.
• Added + and % to character class matching query string.
• Changed PHP version regex delimiter from: % to a: ~.
• Added a "Notes" section with some handy notes.

Edit 2011-10-12: YouTube URL host part may now have any subdomain (not just www.).

Edit 2012-05-01: The consume URL section may now allow for '-'.

Edit 2013-08-23: Added additional format provided by @Mei. (The query part may have a . dot.

Edit 2013-11-30: Added additional format provided by @CRONUS: youtube-nocookie.com.

Edit 2016-01-25: Fixed regex to handle error case provided by CRONUS.

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Here's a method I once wrote for a project that extracts YouTube and Vimeo video keys:

/**
 *  strip important information out of any video link
 *
 *  @param  string  link to a video on the hosters page
 *  @return mixed  FALSE on failure, array on success
 */
function getHostInfo ($vid_link)
{
  // YouTube get video id
  if (strpos($vid_link, 'youtu'))
  {
    // Regular links
    if (preg_match('/(?<=v\=)([\w\d-_]+)/', $vid_link, $matches))
      return array('host_name' => 'youtube', 'original_key' => $matches[0]); 
    // Ajax hash tag links
    else if (preg_match('§([\d\w-_]+)$§i', $vid_link, $matches))
      return array('host_name' => 'youtube', 'original_key' => $matches[0]);
    else
      return FALSE;
  }
  // Vimeo get video id
  elseif (strpos($vid_link, 'vimeo'))
  {
    if (preg_match('§(?<=/)([\d]+)§', $vid_link, $matches))
      return array('host_name' => 'vimeo', 'original_key' => $matches[0]); 
    else
      return FALSE;
  }
  else
    return FALSE;
}

1. Find a regex that will extract all links from a text. Google will help you there.
2. Loop all the links and call getHostInfo() for each

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While ridgerunner's answer is the basis for my answer, his does NOT solve for all urls and I don't believe it is capable of it, due to multiple possible matches of VIDEO_ID in a YouTube URL. My regex includes his aggressive approach as a last resort, but attempts all common matchings first, vastly reducing the possibility of a wrong match later in the URL.

This regex:

/https?:\/\/(?:[0-9A-Z-]+\.)?(?:youtu\.be\/|youtube\.com(?:\/embed\/|\/v\/|\/watch\?v=|\/ytscreeningroom\?v=|\/feeds\/api\/videos\/|\/user\S*[^\w\-\s]|\S*[^\w\-\s]))([\w\-]{11})[?=&+%\w-]*/ig;

Handles all of the cases originally referenced in ridgerunners examples, plus any url that might happen to have an 11 character sequence later in the url. ie:

http://www.youtube.com/watch?v=GUEZCxBcM78&feature=pyv&feature=pyv&ad=10059374899&kw=%2Bwingsuit

Here is a working sample that tests all of the sample YouTube urls:

http://jsfiddle.net/DJSwc/5/

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Try

[^\s]*youtube\.com[^\s]*?v=([-\w]+)[^\s]*

You will find the video IDs' in the first capturing group. What I don't know is what is a valid Video ID? At the moment I check for v= and capture all -A-Za-z0-9_.

I checked it online here on rubular with your sample string.

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Use:

<?php

    // The YouTube URL string

    $youtube_url='http://www.youtube.com/watch?v=8VtUYvwktFQ';

    // Use regex to get the video ID

    $regex='#(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=[0-9]/)[^&\n]+|(?<=v=)[^&\n]+#';

    preg_match($regex, $youtube_url, $id);

    // Plug that into our HTML
?>

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Okay, I made a function of my own. But I believe it's pretty inefficient. Any improvements are welcome:

function get_youtube_videos($string) {

    $ids = array();

    // Find all URLs
    preg_match_all('/(http|https)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/', $string, $links);

    foreach ($links[0] as $link) {
        if (preg_match('~youtube\.com~', $link)) {
            if (preg_match('/[^=]+=([^?]+)/', $link, $id)) {
                $ids[] = $id[1];
            }
        }
    }
    return $ids;
}

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I tried a simple expression to get only the videoid:

[?&]v=([^&#]*)

Check it working online here at phpliveregex.

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The original poster asked "I would like to parse it and find all YouTube video URLs and their ids." I switched the most popular answer above to a preg_match and returned the video id and URL.

Get YouTube URL and ID from post:

$match[0] = Full URL
$match[1] = video ID

function get_youtube_id($input) {
    $input = preg_match('~https?://(?:[0-9A-Z-]+\.)?(?:youtu\.be/|youtube(?:-nocookie)?\.com\S*[^\w\s-])([\w-]{11})(?=[^\w-]|$)(?![?=&+%\w.-]*(?:[\'"][^<>]*>|</a>))[?=&+%\w.-]*~ix',
                        $input, $match);
    return $match;
}

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Find a YouTube link easily from a string:

function my_url_search($se_action_data)
{
    $regex = '/https?\:\/\/[^\" ]+/i';
    preg_match_all($regex, $se_action_data, $matches);
    $get_url=array_reverse($matches[0]);
    return array_unique($get_url);
}
echo my_url_search($se_action_data)

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String urlid="" ;
String  url="http://www.youtube.com/watch?v=0zM4nApSvMg#t=0m10s";
Pattern pattern =Pattern.compile("(?:http|https|)(?::\\/\\/|)(?:www.|)(?:youtu\\.be\\/|youtube\\.com(?:\\/embed\\/|\\/v\\/|\\/watch\\?v=|\\/ytscreeningroom\\?v=|\\/feeds\\/api\\/videos\\/|\\/user\\\\S*[^\\w\\-\\s]|\\S*[^\\w\\-\\s]))([\\w\\-\\_]{11})[a-z0-9;:@#?&%=+\\/\\$_.-]*");
Matcher result = pattern.matcher(url);
    if (result.find())
    {
         urlid=result.group(1);

    }

This code in java works absolutely fine for all youtube urls at present.

참고URL : https://stackoverflow.com/questions/5830387/how-do-i-find-all-youtube-video-ids-in-a-string-using-a-regex