chamilo-lms2/main/inc/lib/formvalidator/Rule/FileName.php

<?php
/* For licensing terms, see /license.txt */

/** @author Julio Montoya */

/**
 * Class HTML_QuickForm_Rule_FileName
 */
class HTML_QuickForm_Rule_FileName extends HTML_QuickForm_Rule
{

	/**
	 * @param $value array     Uploaded file info (from $_FILES)
	 * @param null $options
	 * @return bool
	 */
	public function validate($value, $options = null)
	{
		if ((isset($elementValue['error']) && $elementValue['error'] == 0) ||
			(!empty($elementValue['tmp_name']) && $elementValue['tmp_name'] != 'none')) {
			return is_uploaded_file($elementValue['tmp_name']);
		} else {
			return false;
		}
	}
}