CBPTrackingServiceResult::convertTimestampTag

static function convertTimestampTag($string): string
{
	return preg_replace_callback(
		'/[timestamp=(d+)].*[/timestamp]/i',
		static function ($matches)
		{
			$timestamp = (int)$matches[1];

			$datetime = new BitrixBizprocBaseTypeValueDateTime($timestamp, CTimeZone::GetOffset());
			if ($datetime->getTimestamp() === null)
			{
				return '';
			}

			return (string)$datetime;
		},
		$string
	);
}