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
Descrizione
Stile orientato agli oggetti
Stile procedurale
Elenco dei parametri
-
oggetto -
Solo per lo stile procedurale: Un oggetto DateTime restituito da date_create(). La funzione modifica questo oggetto.
-
timezone -
A DateTimeZone object representing the desired time zone.
Valori restituiti
Restituisce l'oggetto DateTime per il metodo chaining o FALSE in caso di fallimento.
Log delle modifiche
| Versione | Descrizione |
|---|---|
| 5.3.0 | Modificato il
valore di ritorno in caso di successo da NULL a DateTime. |
Esempi
Example #1 DateTime::setTimeZone() example
Stile orientato agli oggetti
<?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";
?>
Stile procedurale
<?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";
?>
I precedenti esempi visualizzeranno:
2000-01-01 00:00:00+12:00 2000-01-01 01:45:00+13:45
Vedere anche:
- 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"
**/
?>