Function: open_basedir

    $file_extension = substr($PHP_SELF, strrpos($PHP_SELF, '.'));
    $files_array = array();
	  if ($dir = @dir(DIR_FS_CATALOG)) {
	    while ($file = $dir->read()) {
	      if (!is_dir(DIR_FS_CATALOG . $file)) {
	        if (substr($file, strrpos($file, '.')) == $file_extension) {
            $files_array[] = $file;
          }
        }
      }
      sort($files_array);
      $dir->close();
    }

Change to:

    $file_extension = substr($PHP_SELF, strrpos($PHP_SELF, '.'));
    $files_array = array();
	  if ($dir = @dir(DIR_FS_CATALOG)) {
	    while ($file = $dir->read()) {
         if ($file == '.' || $file == '..') continue;
	      if (!is_dir(DIR_FS_CATALOG . $file)) {
	        if (substr($file, strrpos($file, '.')) == $file_extension) {
            $files_array[] = $file;
          }
        }
      }
      sort($files_array);
      $dir->close();
    }