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
integer Unix timestamp that defaults to the current
local time if a timestamp is not given. In other
words, it defaults to the value of time().
Return Values
Returns a formatted date string. If a non-numeric value is used for
timestamp, FALSE is returned and an
E_WARNING level error is emitted.
ChangeLog
Version
Description
5.1.0
The valid range of a timestamp is typically from Fri, 13 Dec
1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT. (These are
the dates that correspond to the minimum and maximum values for
a 32-bit signed integer). However, before PHP 5.1.0 this range was limited
from 01-01-1970 to 19-01-2038 on some systems (e.g. Windows).
5.1.1
There are useful constants
of standard date/time formats that can be used to specify the
format parameter.
Examples
Example 1. gmdate() example
When run in Finland (GMT +0200), the first line below prints "Jan 01
1998 00:00:00", while the second prints "Dec 31 1997 22:00:00".
<?php echo date("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); echo gmdate("M d Y H:i:s", mktime(0, 0, 0, 1, 1, 1998)); ?>
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