Short URL and Long URL use Google Short API

There are many services that allow users shortened link such as bit.ly , adf.ly, goo.gl, ... In this article, I will guide you to use the google shortened link services to get short link from long link or reverse

Get API Key from Google Code

Go to http://code.google.com/apis/console/ create new account then enable URL Shortener API
Then, Get Public API Key Access

Class GooGl

Here I have written class Googl has 2 method:
- GetShortURL from Long url
- GetLongURL from short url encode
You need define $apiKey (you get above) and $apiURL (current, api url of googl is https://www.googleapis.com/urlshortener/v1/url)

class GooGl
{
    // get key from http://code.google.com/apis/console/
    private $apiKey = '';

    //API google shorten url
    private $apiURL = 'https://www.googleapis.com/urlshortener/v1/url';

    private $url;

    /**
     * check curl_init off & trigger error
     */
    public function __construct()
    {
        if (!function_exists('curl_init')) {
            trigger_error('cURL off');
        }
        $this->apiURL = $this->apiURL . '?key=' . $this->apiKey;
    }

    public function setURL($url)
    {
        $this->url = $url;

        return $this;
    }

    public function getShortURL()
    {
        $jsonResponse = $this->curlRequest($this->apiURL, json_encode(array('longUrl' => $this->url)));

        return $jsonResponse->id;
    }

    public function getLongURL()
    {
        $jsonResponse = $this->curlRequest($this->apiURL . '&shortUrl=' . $this->url);

        return $jsonResponse->longUrl;
    }

    /**
     * if $jsonData is null => getLongURL, method GET
     * else getShortURL, method POST
     */
    private function curlRequest($apiURL, $jsonData = null)
    {
        $curlObj = curl_init();
        curl_setopt($curlObj, CURLOPT_URL, $apiURL);
        curl_setopt($curlObj, CURLOPT_HEADER, 0);

        if ($jsonData !== null) {
            curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
            curl_setopt($curlObj, CURLOPT_POST, 1);
            curl_setopt($curlObj, CURLOPT_POSTFIELDS, $jsonData);
        }

        curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);

        $response = curl_exec($curlObj);
        curl_close($curlObj);

        return json_decode($response);
    }
}

You can download full source code here: Download

Usage

You can setURL then get direct:

$gooGl = new GooGl();
echo $gooGl->setURL('')->getShortURL();
//
echo $gooGl->setURL('')->getLongURL();

or

$gooGl = new GooGl();
$gooGl->setURL($url);
if ($type == 'short') {
    echo $gooGl->getShortURL();
} else {
    echo $gooGl->getLongURL();
}