title: Jquery Uploadify checkscript
body: <p>I am trying to implement the checkscript feature of uploadify in an asp.net mvc view but i can't determine what the key is i should be using on the controller side. Below is the php script but i am not very familiar with php and can't determine what php is scraping out of the httprequest. Has anyone implemented this? The documentation is a little sparse (as in nonexistent).</p>
  
  <pre><code>$fileArray = array();
  foreach ($_POST as $key =&gt; $value) {
      if ($key != 'folder') {
          if (file_exists($_SERVER['DOCUMENT_ROOT'] . $_POST['folder'] . '/' . $value)) {
              $fileArray[$key] = $value;
          }
      }
  }
  echo json_encode($fileArray);
  ?&gt;
  </code></pre>