title: Array to string conversion when comparing arrays
body: <p>I am trying to use a php inbuilt function to compare 2 arrays.</p>
  
  <pre><code>$json = json_decode(file_get_contents("new.json"), true);
  $last_json = json_decode(file_get_contents("last.json"), true);
  $difference = array_diff_assoc($json, $last_json);
  </code></pre>
  
  <blockquote>
    <p>Notice: Array to string conversion in /storage/whitelist_update.php on line 10</p>
  </blockquote>
  
  <p>Any help would be appreciated!</p>