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

Procedural style

function 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);

The above example will output:

    int(32400)

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