Returns the timezone offset from GMT

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- Returns the timezone offset from GMT

# DateTimeZone::getOffset

# timezone_offset_get

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

DateTimeZone::getOffset -- timezone_offset_get — Returns the timezone offset from GMT

### Description

Object-oriented style

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

Procedural style

timezone_offset_get(DateTimeZone `$object`, DateTimeInterface `$datetime`): int

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.

### Parameters

`object`

  Procedural style only: A DateTimeZone object returned by timezone_open()

`datetime`

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

### Return Values

Returns time zone offset in seconds.

### Examples

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);?>