CODE EXAMPLE FOR PHP

php replace youtube embed url

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