PHP : Function Reference : Date and Time Functions : timezone_offset

Example 469. timezone_offset_get() 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);
?>

The following extended example may make the usage clearer; <?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); // NOTE: $dateTimeJapan is not used further in this example // 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). print("Number of seconds Japan is ahead of GMT at the specific time: "); var_dump($timeOffset); print("<br />Number of seconds Taipei is ahead of GMT at the specific time: "); var_dump($dateTimeZoneTaipei->getOffset($dateTimeTaipei)); print("<br />Number of seconds Japan is ahead of Taipei at the specific time: "); var_dump($dateTimeZoneJapan->getOffset($dateTimeTaipei) -$dateTimeZoneTaipei->getOffset($dateTimeTaipei)); print("<hr />"); ?> Number of seconds Japan is ahead of GMT at the specific time: int(32400) Number of seconds Taipei is ahead of GMT at the specific time: int(28800) Number of seconds Japan is ahead of Taipei at the specific time: int(3600)

timezone_offset_get

Returns the timezone offset from GMT (PHP 5 >= 5.1.0)
int timezone_offset_get ( DateTimeZone object, DateTime datetime )

int DateTimeZone::getOffset ( DateTime datetime )

Example 469. timezone_offset_get() examples

Code Examples / Notes » timezone_offset_get

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timezone_offset_get

Returns the timezone offset from GMT (PHP 5 >= 5.1.0) int timezone_offset_get ( DateTimeZone object, DateTime datetime ) int DateTimeZone::getOffset ( DateTime datetime )

Example 469. timezone_offset_get() examples

Code Examples / Notes » timezone_offset_get

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Returns the timezone offset from GMT (PHP 5 >= 5.1.0)
int timezone_offset_get ( DateTimeZone object, DateTime datetime )

int DateTimeZone::getOffset ( DateTime datetime )