DateTime::setTimestamp
The timestamp value represented by the DateTime object is not modified when you set the timezone using this method. Only the timezone, and thus the resulting display formatting, is affected.
This can be seen using the following test code:
<?php
$MNTTZ = new DateTimeZone('America/Denver');
$ESTTZ = new DateTimeZone('America/New_York');
$dt = new DateTime('11/24/2009 2:00 pm', $MNTTZ);
var_dump($dt->format(DATE_RFC822), $dt->format('U'));
$dt->setTimezone($ESTTZ);
var_dump($dt->format(DATE_RFC822), $dt->format('U'));
/** Output:
string(29) "Tue, 24 Nov 09 14:00:00 -0700"
string(10) "1259096400"
string(29) "Tue, 24 Nov 09 16:00:00 -0500"
string(10) "1259096400"
**/
?>
As such, you can use this to easily convert between timezones for display purposes.
DateTime::setTimezone
date_timezone_set
(PHP 5 >= 5.2.0)
DateTime::setTimezone -- date_timezone_set — Sets the time zone for the DateTime object
Description
Object oriented style
Procedural style
Parameters
-
object -
Procedural style only: A DateTime object returned by date_create(). The function modifies this object.
-
timezone -
A DateTimeZone object representing the desired time zone.
Return Values
Returns the DateTime object for method chaining or FALSE on failure.
Changelog
| Version | Description |
|---|---|
| 5.3.0 | Changed the
return value on success from NULL to DateTime. |
Examples
Example #1 DateTime::setTimeZone() example
Object oriented style
<?php
$date = new DateTime('2000-01-01', new DateTimeZone('Pacific/Nauru'));
echo $date->format('Y-m-d H:i:sP') . "\n";
$date->setTimezone(new DateTimeZone('Pacific/Chatham'));
echo $date->format('Y-m-d H:i:sP') . "\n";
?>
Procedural style
<?php
$date = date_create('2000-01-01', timezone_open('Pacific/Nauru'));
echo date_format($date, 'Y-m-d H:i:sP') . "\n";
date_timezone_set($date, timezone_open('Pacific/Chatham'));
echo date_format($date, 'Y-m-d H:i:sP') . "\n";
?>
The above examples will output:
2000-01-01 00:00:00+12:00 2000-01-01 01:45:00+13:45
See Also
- DateTime::getTimezone() - Return time zone relative to given DateTime
- DateTimeZone::__construct() - Creates new DateTimeZone object
add a note
User Contributed Notes
DateTime::setTimezone - [2 notes]
keithm at aoeex dot com ¶
3 years ago
salladin ¶
1 year ago
I found unexpected behaviour when passing a timestamp.
timezone seems to always be GMT+0000 unless setTimezone() is set.
<?php
$MNTTZ = new DateTimeZone('America/Denver');
$ts = 1336476757;
$dt = new DateTime("@$ts", $MNTTZ);
var_dump($dt->format('T'), $dt->format('U'));
$dt->setTimezone($MNTTZ);
var_dump($dt->format('T'), $dt->format('U'));
/** Output:
string(8) "GMT+0000"
string(10) "1336476757"
string(3) "MDT"
string(10) "1336476757"
**/
?>