Have you ever wanted to quickly get a YouTube channels id quickly and simply? To do this in PHP firstly you will need PHP simple HTML DOM parser download simple_html_dom.php from here and drop it in your scripts directory. Now use the script below, replacing the $url variable with the channel you want an id for.

include('simple_html_dom.php');
$url = "https://www.youtube.com/user/CHANNELHERE";
$html = file_get_html($url);
$channel_id = $html->find('button[class="yt-uix-button-subscribe-branded"]', 0)->data-channel-external-id;
echo channel_id;

To summarize this script; using simple HTML DOM we search the $url for the first instance of <button class="yt-uix-button-subscribe-branded"> and return the value of data-channel-external-id=""

I will ensure to do more HTML DOM tutorials and showcases later on.