Best regex pattern to get youtube video/playlist id with/without time from any youtube link and generate embed code. This regex works with 1) youtube & youtu.be 2) http/https 3) with/without www.

Youtube_Regex_Grab_Video-Playlist_ID_With_Time.php

<?php
 
/*
* @gist Regex to get youtube video/playlist id with/without time & generate embed code
* @license UNLICENSE (http://unlicense.org)
*/
 
$youtube_url = array(
"https://youtu.be/yVpbFMhOAwE",
"https://www.youtube.com/embed/yVpbFMhOAwE",
"youtu.be/yVpbFMhOAwE",
"youtube.com/watch?v=yVpbFMhOAwE",
"http://youtu.be/yVpbFMhOAwE&t=2m",
"http://www.youtube.com/embed/yVpbFMhOAwE&t=2m5s",
"http://www.youtube.com/watch?v=yVpbFMhOAwE",
"http://www.youtube.com/watch?v=yVpbFMhOAwE&feature=g-vrec&t=30s",
"http://www.youtube.com/watch?v=yVpbFMhOAwE&feature=player_embedded",
"http://www.youtube.com/v/yVpbFMhOAwE?fs=1&hl=en_US",
"http://www.youtube.com/ytscreeningroom?v=yVpbFMhOAwE",
"http://www.youtube.com/watch?NR=1&feature=endscreen&v=yVpbFMhOAwE",
"http://www.youtube.com/user/Scobleizer#p/u/1/1p3vcRhsYGo",
"http://www.youtube.com/watch?v=6zUVS4kJtrA&feature=c4-overview-vl&list=PLbzoR-pLrL6qucl8-lOnzvhFc2UM1tcZA",
"https://www.youtube.com/watch?v=FZu097wb8wU&list=RDFZu097wb8wU"
);

foreach($youtube_url as $youtube_url) {
	$data = AutoParseYoutubeLink($youtube_url);
	var_dump ($data);
}

// Automatically parse youtube video/playlist links and generate the respective embed code
function AutoParseYoutubeLink($data)
{
	// Check if youtube link is a playlist
	if (strpos($data, 'list=') !== false) {
		// Generate the embed code
		$data = 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\-]{12,})[a-z0-9;:@#?&%=+\/\$_.-]*~i', 'https://www.youtube.com/embed/videoseries?list=$1', $data);
		
		return $data;
	}
	
	// Check if youtube link is not a playlist but a video [with time identifier]
	if (strpos($data, 'list=') === false && strpos($data, 't=') !== false) {
		$time_in_secs = null;
		
		// Get the time in seconds from the time function
		$time_in_secs = ConvertTimeToSeconds($data);
		
		// Generate the embed code
		$data = 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', 'https://www.youtube.com/embed/$1?start=' . $time_in_secs, $data);
		
		return $data;
	}
	
	// If the above conditions were false then the youtube link is probably just a plain video link. So generate the embed code already.
	$data = 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', 'https://www.youtube.com/embed/$1', $data);
	
	return $data;
}

// Check for time identifier in the youtube video link and conver it into seconds
function ConvertTimeToSeconds($data)
{
	$time = null;
	$hours = null;
	$minutes = null;
	$seconds = null;
	$pattern_time_split = "([0-9]{1-2}+[^hms])";
	
	// Regex to check for youtube video link with time identifier
	$youtube_time = '~(?: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;:@#?&%=+\/\$_.-]*(t=((\d+h)?(\d+m)?(\d+s)?))~i';
	
	// Check for time identifier in the youtube video link, extract it and convert it to seconds
	if (preg_match($youtube_time, $data, $matches)) {
		// Check for hours
		if (isset($matches[4])) {
			$hours = $matches[4];
			$hours = preg_split($pattern_time_split, $hours);
			$hours = substr($hours[0], 0, -1);
		}
		// Check for minutes
		if (isset($matches[5])) {
			$minutes = $matches[5];
			$minutes = preg_split($pattern_time_split, $minutes);
			$minutes = substr($minutes[0], 0, -1);
		}
		// Check for seconds
		if (isset($matches[6])) {
			$seconds = $matches[6];
			$seconds = preg_split($pattern_time_split, $seconds);
			$seconds = substr($seconds[0], 0, -1);
		}
		// Convert time to seconds
		$time = (($hours*3600) + ($minutes*60) + $seconds);
	}
	
	return $time;
}

?>

Please check this link for the explanation of the regex, http://linuxpanda.wordpress.com/2013/07/24/ultimate-best-regex-pattern-to-get-grab-parse-youtube-video-id-from-any-youtube-link-url/. Thanks. :)