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http://www.blueprintinteractive.com/blog/how-instagram-api-fancybox-simplified

Authentication

The first thing we need is an access token. Instagram uses OAuth 2.0 protocol for simple, but effective authentication. I could tell you how to retrieve access tokens but then I'd have to kill you (And everything I've done is documented on Instagram's Developer page). Instead, to make your lives easier, I've provided an easy way for you to attain your access token and user id. Click here to retrieve your access token and user ID.

Instagram has a 5000 request per hour rate limit. This is high in comparison to twitter and similar services so bundling requests to avoid the hitting the limit may not be necessary unless you have high volumes of traffic.

Retrieve Images

Now we are ready to get our images. See the code below to make this happen. In our example, we are using PHP's CURL library to make our requests.

<?php
  function fetchData($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_TIMEOUT, 20);
    $result = curl_exec($ch);
    curl_close($ch); 
    return $result;
  }
  $result = fetchData("https://api.instagram.com/v1/users/ID-GOES-HERE/media/recent/?access_token=TOKEN-GOES-HERE");
  $result = json_decode($result);
  foreach ($result->data as $post) {
    // Do something with this data.
  }
?>    

The Final Product

This uses my Instagram account. As you can see, I pretty much never use it. Click on one of the images below to see the Fancybox integration.