Youtube public API wrapper in PHP

YoutubeAPIHelper.php

class YoutubePublicAPI {
  // Developers key to access the API
	private $key;
	private $base_url = "https://www.googleapis.com/youtube/v3/";

	public function __construct($params){
		$this->key = $params["key"];

	}

	/**
	 * Gets the statistics data for a channel
	 * @param  string $channel_id [description]
	 * @return associative array
	 */
	public function getChannelStatistics($channel_id)
	{
		$args["part"] = "statistics";
		$args["id"] = $channel_id;
		$args["key"] = $this->key;

		$result = $this->get("channels",$args);
		$data = array();

		if($result)
		{
			return get_object_vars($result->items[0]->statistics);
		}

		return $data;
	}

	/**
	 * Gets a list of playlists availabel for a channel
	 * @param  [type] $channel_id [description]
	 * @return [type]             [description]
	 */
	public function getChannelPlaylists($channel_id)
	{
		$data = array();

		$args["part"] = "snippet";
		$args["channelId"] = $channel_id;
		$args["key"] = $this->key;

		$result = $this->get("playlists",$args);

		foreach($result->items as $channel_raw)
		{
			$channel = array();
			$channel["channelId"] = $channel_id;
			$channel["id"] = $channel_raw->id;
			$channel["publishedAt"]	= $channel_raw->snippet->publishedAt;
			$channel["title"] = $channel_raw->snippet->title;
			$channel["description"] = $channel_raw->snippet->description;

			array_push($data, $channel);
		}

		return $data;
	}

	/**
	 * Gets a list of videos and their details beloning to a channel playlist
	 * @param  string $channel_id [description]
	 * @return array of video ids
	 */
	public function getPlaylistVideos($playlist_id)
	{
		$data = array();

		$args["part"] = "snippet";
		$args["playlistId"] = $playlist_id;
		$args["key"] = $this->key;

		$result = $this->get("playlistItems",$args);

		foreach($result->items as $videoObj)
		{
			if($videoObj->snippet->resourceId->kind == "youtube#video")
			{
				$vid = array();
				$vid["id"] = $videoObj->snippet->resourceId->videoId;
				$vid["title"] = $videoObj->snippet->title;

				array_push($data, $vid);
			}
		}

		return $data;
	}

	/**
	 * Get the statistics for a youtube video
	 * @param  [type] $video_id [description]
	 * @return [type]           [description]
	 */
	public function getVideoStatistics($video_id)
	{
		$args["part"] = "statistics";
		$args["id"] = $video_id;
		$args["key"] = $this->key;

		$result = $this->get("videos",$args);

		$data = array();

		if($result)
		{
			return get_object_vars($result->items[0]->statistics);
		}
	}

	/**
	 * Issues a get http request for fetching data based on the instance
	 * variables set in this class
	 * @param  associative array $params holds the arguments of the get request
	 * @return object or collection of objects
	 */
	private function get($target, $params)
	{
		// Compose the request URL
		$url = $this->base_url.$target."?";	
		$last = end(array_keys($params));

		foreach($params as $key => $value)
		{
			$amp = "&";

			if($last === $key)
				$amp = "";

			$url .= "$key=$value".$amp;
		}

		// Issue the request	
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$output = curl_exec($ch);
		curl_close($ch);

		return json_decode($output);
	}
}