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PHP: URL shortner using goo.gl

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Google has had a URL shortening domain for quite a while now. I took a few minutes to review their API and created a very basic function where you pass the URL and the key (http://code.google.com/apis/urlshortener/ ) and it will do the magic for you.

PHP Function

function get_short_url($key, $url)
{
        $postData = array('longUrl' => $url, 'key' => $key);
        $jsonData = json_encode($postData);

        $curlObj = curl_init();

        curl_setopt($curlObj, CURLOPT_URL, 'https://www.googleapis.com/urlshortener/v1/url');
        curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curlObj, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($curlObj, CURLOPT_HEADER, 0);
        curl_setopt($curlObj, CURLOPT_HTTPHEADER, array('Content-type:application/json'));
        curl_setopt($curlObj, CURLOPT_POST, 1);
        curl_setopt($curlObj, CURLOPT_POSTFIELDS, $jsonData);

        $response = curl_exec($curlObj);

        // Change the response json string to object
        $json = json_decode($response, true);

        curl_close($curlObj);

        return isset($json['id']) ? $json['id'] : false;
}

Parameters:

$key - You API key 
$url - Long URL which needs to be shortened 

Return Parameter:

FALSE - if url is not shortened 
short url - if url is shortened 

Note: This code is a tested code and used to run at QueryHome before we moved to bit.ly

posted May 21, 2014 by Salil Agrawal

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URL shortening is a technique in which url made substantially shorter in length and still direct to the required page. This is achieved by using an HTTP Redirect on a domain name that is short, which links to the web page that has a long URL.

Short URL is convenient for microblogging which has a 140 character limit. Here in this article I am describing url shortner in PHP using bit.ly

Step 1: get the key and username from http://bitly.com/a/your_api_key (you may require to register) this will provide you the BITLY USERNAME and BITLY API KEY

Step 2: Now from your PHP code you need to pass the key and url which you want to shorten and the username.

function get_short_bitty_url($key, $url, $username)
{
      $ch = curl_init("http://api.bitly.com/v3/shorten?login=$username&apiKey=$key&longUrl=$url");
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

      $result = curl_exec($ch);
      $json = json_decode($result, true);
      curl_close($ch);
      return $json['status_code'] == 200 ? $json['data']['url'] : false;
}

This function will return false if bit.ly could not shorten the url for some reason else it will return the short url of the passed long url.

Note: This code is running at the QueryHome.

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