How to Extract YouTube Video IDs from Various URLs Using PHP Regex?

Parse YouTube Video IDs with PHP Regex

To parse the video ID from a YouTube URL using PHP's preg_match, employ the following improved regular expression:

if (preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/\s]{11})%i', $url, $match)) {
    $video_id = $match[1];
}

Benefits:

• Universal Compatibility: This regex captures video IDs from various YouTube URL formats, including youtu.be, watch?v=, and embed codes.
• Exception Handling: It ignores additional characters present after the video ID in the URL, ensuring reliable extraction.
• Support for Alternate URLs: The regex also handles YouTube URLs hosted on youtube-nocookie.com.

Usage:

$subject = "http://www.youtube.com/watch?v=z_AbfPXTKms&NR=1";
preg_match('%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/\s]{11})%i', $subject, $matches);

print "<pre class="brush:php;toolbar:false">";
print_r($matches);
print "

";

Sample Input/Output:

Input URL	Output
http://youtu.be/dQw4w9WgXcQ	z_AbfPXTKms
http://www.youtube.com/e/dQw4w9WgXcQ	z_AbfPXTKms
http://www.youtube.com/watch?feature=player_embedded&v=dQw4w9WgXcQ	z_AbfPXTKms
http://www.youtube-nocookie.com/watch?v=dQw4w9WgXcQ	z_AbfPXTKms

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