/** * Returns a formatted date for meta information * @param $n (int) Object ID. * @param $timestamp (int) Timestamp to convert. * @return string escaped date string. * @protected * @since 4.6.028 (2009-08-25) */ protected function _datestring($n = 0, $timestamp = 0) { if (empty($timestamp) or $timestamp < 0) { $timestamp = $this->doc_creation_timestamp; } return $this->_datastring('D:' . TCPDF_STATIC::getFormattedDate($timestamp), $n); }