chamilo-lms/main/inc/lib/fileUpload.lib.php

<?php
/* For licensing terms, see /license.txt */
/**
 *    FILE UPLOAD LIBRARY
 *
 *    This is the file upload library for Chamilo.
 *    Include/require it in your code to use its functionality.
 *
 * @package chamilo.library
 * @todo test and reorganise
 */
/**
 * Code
 */
require_once api_get_path(LIBRARY_PATH).'document.lib.php';