Bitly URL Shorten using Bitly API and PHP

Bitly is one of the most powerful and popular URL shorten and bookmark service in the universe. Bitly offers simple and powerful API to generate short URL from long one. To use this API you have to signup for an API key. Bitly offers it free for it's all users. If you want, you can get it from Bitly's home page. Here's an example to create a short URL using PHP.

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The Bitly Class:

class Bitly
{
	var $apiURL = 'http://api.bit.ly/v3/';
	var $apiQuery = '';

	/**
	 * @param str $login as Bitly login
	 * @param str $apiKey as Bitly API Key
	 */
	function __construct($login, $apiKey)
	{
		$this->apiQuery = 'login=' . $login;
		$this->apiQuery .= '&apiKey=' . $apiKey;
		$this->apiQuery .= '&format=json';
	}

	/**
	 * Short Long URL
	 * @param string URL
	 * @return string || void
	 */
	function shorten($uri)
	{
		$this->apiQuery .= '&uri=' . urlencode($uri);
		$query = $this->apiURL . 'shorten?' . $this->apiQuery;
		$data = $this->curl($query);
		$json = json_decode($data);
		return isset($json->data->url) ? $json->data->url : '';
	}

	/**
	 * Expend Short URL
	 * @param str URL
	 * @return str || void
	 */
	function expend($uri)
	{
		$this->apiQuery .= '&shortUrl='.urlencode($uri);
		$query = $this->apiURL . 'expand?' . $this->apiQuery;
		$data = $this->curl($query);
		$json = json_decode($data);
		return isset($json->data->expand[0]->long_url) ? $json->data->expand[0]->long_url : '';
	}

	/**
	 * Send CURL Request
	 * @param string URL
	 * @return string
	 */
	function curl($url)
	{
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		$data = curl_exec($ch);
		curl_close($ch);
		return $data;
	}
}

Usage:

# Include main bitly class
include 'bitly.php';
# Bitly User Login
$login = 'my-bitly-login';
# Bitly API key
$api = 'my-bitly-api-key';

$bitly = new Bitly($login, $api);
# Shorten Long URL
$bitly->shorten('http://www.w3bees.com');
# Expend Short URL
$bitly->expend('http://bit.ly/15MCr0p');

Enjoy it! Thanks!