Google API - URL Shortener with PHP

Question

My code is below. The URL shortening service works, but it doesn't when I insert my $POST. Does anyone know how to fix this my looking at the code?

// This is the URL you want to shorten
$longUrl = 'http://www.mysite.com/XXXXX/XX/$_POST['qrname']';

// Get API key from : http://code.google.com/apis/console/
$apiKey = 'MyAPIKey';

$postData = array('longUrl' => $longUrl, 'key' => $apiKey);
$jsonData = json_encode($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);

curl_close($curlObj);

echo 'Shortened URL is: '.$json->id;

Answer 1

Don't have enough reputation points yet to comment, but I got this working fine by replacing the line:

echo 'Shortened URL is: '.$json->id;

with:

$shortLink = get_object_vars($json);
echo "Shortened URL is: ".$shortLink['id'];

It could be just my php installation, but the original line kept throwing a 500 Internal Error for me.

Answer 2

<?php 
//URL Shortening Functions( Just copy & paste below code in your application)
function short_url($longUrl){
        $apiKey = '******************'; // put your GOOGLE API SHORTENING KEY 
        $postData = array('longUrl' => $longUrl, 'key' => $apiKey);
        $curlObj = curl_init();
        $jsonData = json_encode($postData);
        curl_setopt($curlObj, CURLOPT_URL, 'https://www.googleapis.com/urlshortener/v1/url?key='.$postData['key']);
        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);
        $json = json_decode($response);
        curl_close($curlObj);
        if(isset($json->error) || $json == null){
             return $longUrl; // retrun same url in case of error or null response
        }else{
            return $json->id; // return shorted url
        }
    }
// use this function here
$longUrl = 'https://www.w3schools.com/';
echo short_url($longUrl); // print short url

// If you want to return short url to long url use below function
function long_url($shortUrl){
        $apiKey = '***********'; // put your GOOGLE API SHORTENING Key
        $params = array('shortUrl' => $shortUrl, 'key' => $apiKey,'projection' => "ANALYTICS_CLICKS");
        $final_url = 'https://www.googleapis.com/urlshortener/v1/url?'.http_build_query($params);
        $curlObj = curl_init($final_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'));
        $response = curl_exec($curlObj);
        $json = json_decode($response);
        curl_close($curlObj);
        if(isset($json->error) || $json == null){
            return $shortUrl;
        }else{
            return $json->longUrl;
        }
    }
//Function Use here
echo "<br>"; // For next line
$shortUrl = ''; // put the short url generated from above function
echo long_url($shortUrl); // get long url
?>