int offset does not cover fractional offsets of "rogue" locations such as Nepal etc.
DateTimeZone::getOffset
timezone_offset_get
(PHP 5 >= 5.2.0, PHP 7)
DateTimeZone::getOffset -- timezone_offset_get — Returns the timezone offset from GMT
Descrierea
Stil obiect-orientat
Stil procedural
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.
Parametri
-
object -
Doar pentru stilul procedural: Un obiect DateTimeZone întors de funcția timezone_open()
-
datetime -
DateTime that contains the date/time to compute the offset from.
Valorile întoarse
Returns time zone offset in seconds.
Istoricul schimbărilor
| Versiune | Descriere |
|---|---|
| 8.0.0 |
Prior to this version, false was returned on failure.
|
| 5.5.19, 5.6.3 |
datetime type changed to
DateTimeInterface.
Previously, DateTime.
|
Exemple
Example #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($timeOffset);
?>
add a note
User Contributed Notes 2 notes
Anonymous ¶
1 year ago
Daniel Vidal ¶
1 year ago
Note that the DateTime parameter has no effect in the result returned by DateTimeZone::getOffset($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
*/
?>
