/**
* Get the datetime object, in site's time zone, if the datetime string was valid
*
* @param string $datetime_string The datetime string in UTC time zone, that needs to be converted to a DateTime object.
* @param string $format
*
* @return DateTime|null in site's time zone
*/
public function get_datetime_with_timezone($datetime_string, $format = 'c')
{
static $utc_timezone, $local_timezone;
if (!isset($utc_timezone)) {
$utc_timezone = new DateTimeZone('UTC');
$local_timezone = new DateTimeZone($this->get_timezone_string());
}
if (!empty($datetime_string) && YMBESEO_Utils::is_valid_datetime($datetime_string)) {
$datetime = new DateTime($datetime_string, $utc_timezone);
$datetime->setTimezone($local_timezone);
return $datetime->format($format);
}
return null;
}
