Getting basic information from Instagram using PHP

I am trying to get number of total followers that followed me in Instagram. Unfortunately not a single solution is working for me. After a long research only this one is working in my case. I am going to share code may be it will help someone else.

First you have to register your application at instagr.am/developer

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require 'instagram.class.php';
require 'instagram.config.php';

// Receive OAuth code parameter
$code = $_GET['code'];

// Check whether the user has granted access
if (true === isset($code)) {
     $data = $instagram->getOAuthToken($code);
     if(empty($data->user->username))
     {
        header('Location: index.php');
     }
     else
     {
        session_start();
        $_SESSION['userdetails']=$data;

        $url = 'https://api.instagram.com/v1/users/'.$data->user->id.'?access_token='.$data->access_token;
        $api_response = file_get_contents($url);
        $record = json_decode($api_response);
        
        echo $user=$data->user->username."<br>";
        echo $fullname=$data->user->full_name."<br>";
        echo $bio=$data->user->bio."<br>";
        echo $website=$data->user->website."<br>";
        echo $id=$data->user->id."<br>";
        echo $token=$data->access_token."<br>";
        echo $followed_by = $record->data->counts->followed_by."<br>";
     }
}
else 
{
     // Check whether an error occurred
     if(true === isset($_GET['error']))
     {
        echo 'An error occurred: '.$_GET['error_description'];
     }
}

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