with this script you can get latest instagram pictures of any user without auth

instagram.php

<?php

  function fetchData($url){
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
  curl_setopt($ch, CURLOPT_TIMEOUT, 20);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);  
  $result = curl_exec($ch);
  curl_close($ch); 
  return $result;
  }

  $result = fetchData("https://api.instagram.com/v1/users/28596008/media/recent/?client_id=[YOUR CLIENT ID]&count=6");


  $result = json_decode($result);
  foreach ($result->data as $post) {

    echo '<a href="{{$post->link}}"><img src="{{$post->images->low_resolution->url}}" alt="" /><span class="hover"></span></a>';

  }
?>