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YouTube thumbnail from video url

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<?php

/**

 * Get YouTube thumbnail from video url 

 *

 */

function be_youtube_thumbnail( $video_url ) {

  $y_id = preg_replace( '~(?: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;:@#?&%=+\/\$_.-]*~i', '$1', $video_url );

  $image = $y_id ? '<img src="https://img.youtube.com/vi/' . $y_id . '/0.jpg" />' : false;

  return $image;

}

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