# gmmktime

(PHP 4, PHP 5)

gmmktime — Get Unix timestamp for a GMT date

### Description

int gmmktime ([ int `$hour` [, int `$minute` [, int `$second` [, int `$month` [, int `$day` [, int `$year` [, int `$is_dst` ]]]]]]] )

Identical to mktime() except the passed parameters represents a GMT date. gmmktime() internally uses mktime() so only times valid in derived local time can be used.

Like mktime(), arguments may be left out in order from right to left, with any omitted arguments being set to the current corresponding GMT value.

### Parameters

`hour`

  The hour

`minute`

  The minute

`second`

  The second

`month`

  The month

`day`

  The day

`year`

  The year

`is_dst`

  Parameters always represent a GMT date so `is_dst` doesn't influence the result.

### Return Values

Returns a integer Unix timestamp.

### ChangeLog

Version | Description
--- | ---
5.1.0 | As of PHP 5.1.0, the `is_dst` parameter became deprecated. As a result, the new timezone handling features should be used instead.

### Examples

Example#1 gmmktime() on Windows boundary

`<?php
gmmktime(0, 0, 0, 1, 1, 1970); // valid in GMT and west, invalid in east
?>`

### See Also

- mktime()
- date()
- time()