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DateTimeZone::getOffset

timezone_offset_get

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

DateTimeZone::getOffset -- timezone_offset_getReturns the timezone offset from GMT

Açıklama

Nesne yönelimli kullanım

public DateTimeZone::getOffset(DateTimeInterface $datetime): int

Yordamsal kullanım

This function returns the offset to GMT for the date/time specified in the datetime parameter. The GMT offset is calculated with the timezone information contained in the DateTimeZone object being used.

Değiştirgeler

nesne

Sadece yordamsal biçem: timezone_open() işlevinden dönen bir DateTimeZone nesnesi.

datetime

DateTime that contains the date/time to compute the offset from.

Dönen Değerler

Returns time zone offset in seconds.

Sürüm Bilgisi

Sürüm: Açıklama
8.0.0 Prior to this version, false was returned on failure.

Örnekler

Örnek 1 DateTimeZone::getOffset() examples

<?php
// Create two timezone objects, one for Taipei (Taiwan) and one for
// Tokyo (Japan)
$dateTimeZoneTaipei = new DateTimeZone("Asia/Taipei");
$dateTimeZoneJapan = new DateTimeZone("Asia/Tokyo");

// Create two DateTime objects that will contain the same Unix timestamp, but
// have different timezones attached to them.
$dateTimeTaipei = new DateTime("now"$dateTimeZoneTaipei);
$dateTimeJapan = new DateTime("now"$dateTimeZoneJapan);

// Calculate the GMT offset for the date/time contained in the $dateTimeTaipei
// object, but using the timezone rules as defined for Tokyo
// ($dateTimeZoneJapan).
$timeOffset $dateTimeZoneJapan->getOffset($dateTimeTaipei);

// Should show int(32400) (for dates after Sat Sep 8 01:00:00 1951 JST).
var_dump($timeOffset);
?>

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User Contributed Notes 2 notes

up
0
Anonymous
1 month ago
int offset does not cover fractional offsets of "rogue" locations such as Nepal etc.
up
0
Daniel Vidal
1 month ago
Note that the DateTime parameter has no effect in the result returned by DateTimeZone::getOffset($DateTime), unless, it refers to a DateTime where there is daylight savings in the referenced DateTimeZone.

Ex.:
<?php
$timezone_brl   
= new DateTimeZone('America/Sao_Paulo');
$timezone_eng    = new DateTimeZone('Europe/London');
$timezone_aus    = new DateTimeZone('Australia/Brisbane');

$dateTimes = [
      new
DateTime()
    , new
DateTime('now', $timezone_eng)
    , new
DateTime('now', $timezone_aus)
    , new
DateTime('now', $timezone_brl)
    , new
DateTime('2000-06-10', $timezone_brl)
    , new
DateTime('2000-12-10', $timezone_brl)
    , new
DateTime('2020-12-10', $timezone_brl)
];

foreach(
$dateTimes as $dateTime)
{
  echo
"\n" . $timezone_brl->getOffset($dateTime);
}
/**
* -10800
* -10800
* -10800
* -10800
* -10800  // No daylight savings in June/2000
* -  7200  // Brazil had daylight savings until 2020
* -10800  // No more daylight savings, so it returns -10800
*/

?>
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