Get Youtube ID from Youtube Full URL

grt_youtube_id_by_url.php

<?php
/***
	***	@Get youtube video ID from url
	***/
	function get_youtube_id_from_url($url) {
		$pattern =
			'%^# Match any youtube URL
			(?:https?://)?  # Optional scheme. Either http or https
			(?:www\.)?      # Optional www subdomain
			(?:             # Group host alternatives
			  youtu\.be/    # Either youtu.be,
			| youtube\.com  # or youtube.com
			  (?:           # Group path alternatives
				/embed/     # Either /embed/
			  | /v/         # or /v/
			  | /watch\?v=  # or /watch\?v=
			  )             # End path alternatives.
			)               # End host alternatives.
			([\w-]{10,12})  # Allow 10-12 for 11 char youtube id.
			$%x'
			;
		$result = preg_match($pattern, $url, $matches);
		if (false !== $result) {
			return $matches[1];
		}
		return false;
	}