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gmdate

(PHP 4, PHP 5, PHP 7, PHP 8)

gmdate — Format a GMT/UTC date/time

Description

gmdate(string $format, ? int $timestamp = null ): string

Identical to the date() function except that the time returned is Greenwich Mean Time (GMT).

Parameters

format: The format of the outputted date string . See the formatting options for the date() function.
timestamp: The optional timestamp parameter is an int Unix timestamp that defaults to the current local time if timestamp is omitted or null . In other words, it defaults to the value of time() .

Return Values

Returns a formatted date string.

Changelog

Version	Description
8.0.0	`timestamp` is nullable now.

Examples

Example #1 gmdate() example

<?php
date_default_timezone_set("Europe/Helsinki");

echo date("M d Y H:i:s e", mktime(0, 0, 0, 1, 1, 1998)) . "\n";
echo gmdate("M d Y H:i:s e", mktime(0, 0, 0, 1, 1, 1998));

The above example will output:

Jan 01 1998 00:00:00 Europe/Helsinki
Dec 31 1997 22:00:00 UTC

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User Contributed Notes 1 note

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Anonymous ¶

7 months ago

ATTN! The following code produces different result in PHP 7 and PHP 8!
gmdate('Y-m-d\TH:i:s', null);
In PHP 7 null in gmdate('Y-m-d\TH:i:s', null) translated as 0, although gmdate('Y-m-d\TH:i:s'); (w/o 2nd parameter specified) works as it should.
This issue is fixed in PHP 8.