title: Not able to restrict other files from uploading in ElFinder
body: <p>I am using this configuration for my Elfinder to use with CKEditor.</p>
  
  <pre><code>$opts = array(
      // 'debug' =&gt; true,
      'roots' =&gt; array(
          array(
              'driver'        =&gt; 'LocalFileSystem',   // driver for accessing file system (REQUIRED)
              'path'          =&gt; '../../uploads/',         // path to files (REQUIRED)
              'URL'           =&gt; dirname($_SERVER['PHP_SELF']) . '/../../uploads/', // URL to files (REQUIRED)
              'accessControl' =&gt; 'access'  ,           // disable and hide dot starting files (OPTIONAL)
              'uploadAllow' =&gt; array('image/jpg', 'image/png'),
              'alias'      =&gt; 'Home',
              'mimeDetect' =&gt; 'internal',
              'imgLib'     =&gt; 'gd',
          ),
  
  
      ),
  
  
  );
  </code></pre>
  
  <p>However, I am able to upload all the files even PHP files!! I only want images to be uploaded. I am not able to restrict the uploading. Where am I going wrong?</p>