(PHP 4, PHP 5)
gmmktime — Get Unix timestamp for a GMT date
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.
The number of the hour relevant to the start of the day determined by month, day and year. Negative values reference the hour before midnight of the day in question. Values greater than 23 reference the appropriate hour in the following day(s).
The number of the minute relevant to the start of the hour. Negative values reference the minute in the previous hour. Values greater than 59 reference the appropriate minute in the following hour(s).
The number of seconds relevant to the start of the minute. Negative values reference the second in the previous minute. Values greater than 59 reference the appropriate second in the following minute(s).
The number of the month relevant to the end of the previous year. Values 1 to 12 reference the normal calendar months of the year in question. Values less than 1 (including negative values) reference the months in the previous year in reverse order, so 0 is December, -1 is November, etc. Values greater than 12 reference the appropriate month in the following year(s).
The number of the day relevant to the end of the previous month. Values 1 to 28, 29, 30 or 31 (depending upon the month) reference the normal days in the relevant month. Values less than 1 (including negative values) reference the days in the previous month, so 0 is the last day of the previous month, -1 is the day before that, etc. Values greater than the number of days in the relevant month reference the appropriate day in the following month(s).
The year
Parameters always represent a GMT date so is_dst doesn't influence the result.
Returns a integer Unix timestamp.
| 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. |
Example #1 gmmktime() on Windows boundary
<?php
gmmktime(0, 0, 0, 1, 1, 1970); // valid in GMT and west, invalid in east
?>