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# gmmktime

(PHP 3, 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.

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

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.

> 注: gmmktime() internaly uses mktime() so only times valid in derived local time can be used.

範例 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() and time().

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