php replace youtube embed url

1preg_replace("/\s*[a-zA-Z\/\/:\.]*youtube.com\/watch\?v=([a-zA-Z0-9\-_]+)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.]*)/i","<iframe width=\"420\" height=\"315\" src=\"//www.youtube.com/embed/$1\" frameborder=\"0\" allowfullscreen></iframe>",$post_details['description']);

1$youtubeUrl = 'https://www.youtube.com/watch?v=1cQh1ccqu8M';
2$youtubePattern = "/\s*[a-zA-Z\/\/:\.]*youtu(be.com\/watch\?v=|.be\/)([a-zA-Z0-9\-_]+)([a-zA-Z0-9\/\*\-\_\?\&\;\%\=\.]*)/i";
3function youtubeEmbedCallback($matches) {
4    if (!isset($matches[2])) {
5        return '';
6    }
7    $videoId = $matches[2];
8    return '<iframe width="560" height="315" src="https://www.youtube.com/embed/' . $videoId . '" frameborder="0" allowfullscreen></iframe>';
9}
10$youtubeEmbed = preg_replace_callback($youtubePattern, "youtubeEmbedCallback", $youtubeUrl);
11echo $youtubeEmbed;
12//Stamperà:
13//<iframe width="560" height="315" src="https://www.youtube.com/embed/1cQh1ccqu8M" frameborder="0" allowfullscreen></iframe>