DateTimeZone::getOffset

timezone_offset_get

(PHP 5 >= 5.2.0, PHP 7)

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

Descrizione

Stile orientato agli oggetti

public int DateTimeZone::getOffset ( DateTime $datetime )

Stile procedurale

int timezone_offset_get ( DateTimeZone $object , DateTime $datetime )

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.

Elenco dei parametri

oggetto

Solo per lo stile procedurale: Un oggetto DateTimeZone restituito da timezone_open()

datetime

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

Valori restituiti

Returns time zone offset in seconds on success o FALSE in caso di fallimento.

Esempi

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);
?>

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User Contributed Notes 1 note

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4
Fred Gandt
3 years ago
Procedural Style:

<?php
// Don't know where the server is or how its clock is set, so default to UTC
date_default_timezone_set( "UTC" );

// The client is in England where daylight savings may be in effect
$daylight_savings_offset_in_seconds = timezone_offset_get( timezone_open( "BST" ), new DateTime() );

// Do something useful with the number
echo date( "U" ) + $daylight_savings_offset_in_seconds;
?>
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