时区偏移功能在夏季增加了1个小时

Question

这个时区偏移函数在夏天增加了一个小时。它在冬天工作。

有人能看到哪里出了问题吗：

public static function Date_GetOffset($order) {
        $tz = new DateTimeZone("Europe/Copenhagen");
        $date = new DateTime($order->order_datetime, $tz);  
        $trans = $tz->getTransitions();
        foreach ($trans as $k => $t) {
            if ($t["ts"] > $date->format('U')) {
                $DST = $trans[$k-1]['isdst'];
                break;            
            }
        }
        if (empty($DST)) {
            $DST = 0;
        }
        $config = JFactory::getConfig();
        $timezone = $config->get('offset');
        //$tz=timezone_open("Europe/London");
        $dateTimeGMT=date_create("now",timezone_open($timezone));
        $offset = timezone_offset_get($tz,$dateTimeGMT);
        $offset = $offset / 3600;
        $offsetText = "+".(string)($DST + $offset)." hours";
        return date("Y-m-d H:i:s", strtotime($offsetText, strtotime($order->order_datetime)));
}

Answer 1

这里是法国时间的一个例子：

//[Modif oto]Auto Manage of summer time
// Origine : $diff = ($pun_user['timezone'] + $pun_user['dst']) * 3600;
if($pun_user['timezone'] == 1) {// Timezone of France
  date_default_timezone_set('Europe/Paris'); //Forcing timezone
  if(date('I')) $diff = 7200; // Summer?
  else $diff = 3600;
}
else $diff = ($pun_user['timezone'] + $pun_user['dst']) * 3600;

或

$date_default_save = date_default_timezone_get();
date_default_timezone_set($pun_user['timezone']);
if(date('I')) .... // User is in summer
....
date_default_timezone_set($date_default_save);