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gmdate()
Posted on: August 28, 2009 at 12:00 AM
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Using the following example, you can format the date/time into GMT/UTC date/time.

PHP gmdate() Function

gmdate function format a GMT/UTC date/time. This function is similar to date() except in finding the Greenwich Mean Time (GMT). It 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.

Syntax on gmdate() Function PHP

string gmdate ( string $format [, int $timestamp ] )

Parameters on gmdate() Function PHP

format - Format is essential. It specifies how to return the result:

  • d - The day of the month (from 01 to 31)
  • D - A textual representation of a day (three letters)
  • j - The day of the month without leading zeros (1 to 31)
  • l (lowercase 'L') - A full textual representation of a day
  • N - The ISO-8601 numeric representation of a day (1 for Monday through 7 for Sunday)
  • S - The English ordinal suffix for the day of the month (2 characters st, nd, rd or th. Works well with j)
  • w - A numeric representation of the day (0 for Sunday through 6 for Saturday)
  • z - The day of the year (from 0 through 365)
  • W - The ISO-8601 week number of year (weeks starting on Monday)
  • F - A full textual representation of a month (January through December)
  • m - A numeric representation of a month (from 01 to 12)
  • M - A short textual representation of a month (three letters)
  • n - A numeric representation of a month, without leading zeros (1 to 12)
  • t - The number of days in the given month
  • L - Whether it's a leap year (1 if it is a leap year, 0 otherwise)
  • o - The ISO-8601 year number
  • Y - A four digit representation of a year
  • y - A two digit representation of a year
  • a - Lowercase am or pm
  • A - Uppercase AM or PM
  • B - Swatch Internet time (000 to 999)
  • g - 12-hour format of an hour (1 to 12)
  • G - 24-hour format of an hour (0 to 23)
  • h - 12-hour format of an hour (01 to 12)
  • H - 24-hour format of an hour (00 to 23)
  • i - Minutes with leading zeros (00 to 59)
  • s - Seconds, with leading zeros (00 to 59)
  • e - The timezone identifier (Examples: UTC, Atlantic/Azores)
  • I (capital i) - Whether the date is in daylights savings time (1 if Daylight Savings Time, 0 otherwise)
  • O - Difference to Greenwich time (GMT) in hours (Example: +0100)
  • T - Timezone setting of the PHP machine (Examples: EST, MDT)
  • Z - Returns 0
  • c - The ISO-8601 date (e.g. 2004-02-12T15:19:21+00:00)
  • r - The RFC 2822 formatted date (e.g. Thu, 21 Dec 2000 16:01:07 +0200)
  • U - The seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)

timestamp - Optional and integer parameter. It defaults to the current local time if Unix timestamp is not specified. 

Example of gmdate() Function PHP:

<?php
echo("Result with date():<br />");
echo(date("l") . "<br />");
echo(date("l dS \of F Y h:i:s A") . "<br />");
echo("Mar 8,1978 was on a ".date("l", mktime(0,0,0,8,3,1978))."<br />");
echo(date(DATE_RFC822) . "<br />");
echo(date(DATE_ATOM,mktime(0,0,0,8,3,1978)) . "<br /><br />");

echo("Result with gmdate():<br />");
echo(gmdate("l") . "<br />");
echo(gmdate("l dS \of F Y h:i:s A") . "<br />");
echo("Mar 8,1978 was on a ".gmdate("l", mktime(0,0,0,8,3,1978))."<br />");
echo(gmdate(DATE_RFC822) . "<br />");
echo(gmdate(DATE_ATOM,mktime(0,0,0,8,3,1978)) . "<br />");
?>

Output: The output of the code above could be something like this:

Result with date():
Friday
Friday 28th of August 2009 02:26:22 PM
Mar 8, 1978 was on a Wednesday
Fri, 28 Aug 2009 14:26:22 CET
1978-03-08T00:00:00+05300

Result with gmdate():
Friday
Friday 28th of August 2009 02:26:22 PM
Mar 8, 1978 was on a Wednesday
Fri, 28 Jan 2009 08:04:22 GMT
1978-03-07T18:30:00+0000

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Posted on: August 28, 2009

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