PHP Video Url Parser

README.md

Youtube/Vimeo Video Url Parser

Parses URLs from major cloud video providers. Capable of extracting keys from various video embed and link urls to manipulate and access videos in various ways.

Usage

VideoUrlParser::identify_service("https://www.youtube.com/watch?v=x_8kFbZf20I&feature=youtu.be");
// returns string "youtube"

VideoUrlParser::get_url_id("https://www.youtube.com/watch?v=x_8kFbZf20I&feature=youtu.be");
// returns string "x_8kFbZf20I"

VideoUrlParser::get_url_embed("https://www.youtube.com/watch?v=x_8kFbZf20I&feature=youtu.be");
// returns string "http://youtube.com/embed/x_8kFbZf20I?autoplay=1"

Supports

• Vimeo
• Youtube

VideoUrlParser.class.php

<?php
/**
 * Video Url Parser
 *
 * Parses URLs from major cloud video providers. Capable of returning
 * keys from various video embed and link urls to manipulate and
 * access videos in various ways.
 */
class VideoUrlParser
{
	/**
	 * Determines which cloud video provider is being used based on the passed url.
	 *
	 * @param string $url The url
	 * @return null|string Null on failure to match, the service's name on success
	 */
	public static function identify_service($url)
	{
		if (preg_match('%youtube|youtu\.be%i', $url)) {
			return 'youtube';
		}
		elseif (preg_match('%vimeo%i', $url)) {
			return 'vimeo';
		}
		return null;
	}

	/**
	 * Determines which cloud video provider is being used based on the passed url,
	 * and extracts the video id from the url.
	 *
	 * @param string $url The url
	 * @return null|string Null on failure, the video's id on success
	 */
	public static function get_url_id($url)
	{
		$service = self::identify_service($url);

		if ($service == 'youtube') {
			return self::get_youtube_id($url);
		}
		elseif ($service == 'vimeo') {
			return self::get_vimeo_id($url);
		}
		return null;
	}

	/**
	 * Determines which cloud video provider is being used based on the passed url,
	 * extracts the video id from the url, and builds an embed url.
	 *
	 * @param string $url The url
	 * @return null|string Null on failure, the video's embed url on success
	 */
	public static function get_url_embed($url)
	{
		$service = self::identify_service($url);

		$id = self::get_url_id($url);

		if ($service == 'youtube') {
			return self::get_youtube_embed($id);
		}
		elseif ($service == 'vimeo') {
			return self::get_vimeo_embed($id);
		}
		return null;
	}

	/**
	 * Parses various youtube urls and returns video identifier.
	 *
	 * @param string $url The url
	 * @return string the url's id
	 */
	public static function get_youtube_id($url)
	{
		$youtube_url_keys = array('v','vi');

		// Try to get ID from url parameters
		$key_from_params = self::parse_url_for_params($url, $youtube_url_keys);
		if ($key_from_params) return $key_from_params;

		// Try to get ID from last portion of url
		return self::parse_url_for_last_element($url);
	}

	/**
	 * Builds a Youtube embed url from a video id.
	 *
	 * @param string $youtube_video_id The video's id
	 * @return string the embed url
	 */
	public static function get_youtube_embed($youtube_video_id, $autoplay = 1)
	{
		$embed = "http://youtube.com/embed/$youtube_video_id?autoplay=$autoplay";

		return $embed;
	}

	/**
	 * Parses various vimeo urls and returns video identifier.
	 *
	 * @param string $url The url
	 * @return string The url's id
	 */
	public static function get_vimeo_id($url)
	{
		// Try to get ID from last portion of url
		return self::parse_url_for_last_element($url);
	}

	/**
	 * Builds a Vimeo embed url from a video id.
	 *
	 * @param string $vimeo_video_id The video's id
	 * @return string the embed url
	 */
	public static function get_vimeo_embed($vimeo_video_id, $autoplay = 1)
	{
		$embed = "http://player.vimeo.com/video/$vimeo_video_id?byline=0&amp;portrait=0&amp;autoplay=$autoplay";

		return $embed;
	}

	/**
	 * Find the first matching parameter value in a url from the passed params array.
	 *
	 * @access private
	 *
	 * @param string $url The url
	 * @param array $target_params Any parameter keys that may contain the id
	 * @return null|string Null on failure to match a target param, the url's id on success
	 */
	private static function parse_url_for_params($url, $target_params)
	{
		parse_str( parse_url( $url, PHP_URL_QUERY ), $my_array_of_params );
		foreach ($target_params as $target) {
			if (array_key_exists ($target, $my_array_of_params)) {
				return $my_array_of_params[$target];
			}
		}
		return null;
	}

	/**
	 * Find the last element in a url, without any trailing parameters
	 *
	 * @access private
	 *
	 * @param string $url The url
	 * @return string The last element of the url
	 */
	private static function parse_url_for_last_element($url)
	{
		$url_parts = explode("/", $url);
		$prospect = end($url_parts);
		$prospect_and_params = preg_split("/(\?|\=|\&)/", $prospect);
		if ($prospect_and_params) {
			return $prospect_and_params[0];
		} else {
			return $prospect;
		}
		return $url;
	}
}
 ?>