Users' timezone issue onYii2 with PostgreSQL - php

Question

I would like to ask for a better approach. I am using Yii2 with PostgreSQL, and set all timestamp fields for all table to timestamp with timezone data type.
timestamp with time zone NOT NULL DEFAULT now()
I have created setting which will be called for every response,
Yii::$app->setTimezone(MallSettings::getSetting('timezone', Yii::$app->session['mall_id']));
which will return something like Asia/Makassar or Asia/Jakarta (it depends on user's setting).
I extend the \yii\18n\Formatter, using a class named ZeedFormatter below, and make a new function to display the datetime value in user's preferred timezone.
class ZeedFormatter extends \yii\i18n\Formatter
{
/**
* Format timestamp with timezone value to user's preferred timezone.
* (extends the asDatetime() functionality)
*
* #param [type] $value [description]
* #param [type] $format [description]
* #return [type] [description]
*/
public function asLocaldatetime($value, $format = null)
{
$originalDateTime = \DateTime::createFromFormat('Y-m-d H:i:s.uO', $value);
$originalDateTime->setTimezone(new \DateTimeZone(date_default_timezone_get()));
if ($format === null)
$format = 'Y-m-d H:i:s.uO';
$localDateTime = $originalDateTime->format($format);
return $localDateTime;
}
}
The idea is that whenever I need a 'local' datetime format, I can call it like so:
Yii::$app->formatter->asLocaldatetime('2019-08-29 19:52:21.02886+07');
// will return 2019-08-29 20:52:21.02886+08 for Asia/Makassar timezone
Or, if used inside a GridView,
'position',
'created_at:localdatetime',
['class' => 'backend\widgets\ActionColumn'],
Can I get this functionality only using Yii2's feature? Or (another option) is calling created_at AT TIME ZONE 'Asia/Makassar' from the Psql query? I hope I can get an enlightment. Thank you.

Answer 1

My (another) approach is to keep using the asDatetime() function.
I just realized that I need to remove / comment the timezone from config file. If the value is set there, no matter how I set the timezone at other place, Yii always gets the value from the config file (common/config/main.php) if we are using the asDatetime formatter.
'components' => [
'formatter' => [
// 'class' => '\common\modules\ZeedFormatter',
'locale' => 'id-ID',
// 'timeZone' => 'Asia/Jakarta',
'defaultTimeZone' => 'Asia/Jakarta',
'dateFormat' => 'php:j M Y',
'decimalSeparator' => ',',
'thousandSeparator' => '.',
'currencyCode' => 'Rp ',
'nullDisplay' => '<em style="color:#d8d8d8">null</em>',
'numberFormatterOptions' => [
NumberFormatter::MIN_FRACTION_DIGITS => 0,
NumberFormatter::MAX_FRACTION_DIGITS => 0,
],
],
]
If we need another (or customized) format, we can still use the ZeedFormatter as above and add some desired functions. For example :
public function asMyformat($value)
{
$timestamp = strtotime($value);
$fmt = new \IntlDateFormatter('id-ID', \IntlDateFormatter::NONE, \IntlDateFormatter::LONG);
$fmt->setPattern('hh:mm z');// will return something like '09:47 WITA'
return $fmt->format($timestamp);
}