date_default_timezone_get
Timezone using other approaches:
<?php $datetime = strtotime($originaldatetime) + $time;
$datetime = date('M d, Y h:i A', $datetime);?>
$time obtained from table below:
-25200|International Date Line (West) GMT-12|
-21600|Midway Island, Samoa GMT-11|
-18000|Hawaii, Honolulu GMT-10|
-14400|Alaska GMT-9|
-10800|Pacific Standard Time, US, Canada GMT-8|
-7200|British Columbia N.E., Santa Fe, Mountain Time GMT-7|
-3600|Central America, Chicago, Guatamala, Mexico City GMT-6|
0|US, Canada, Bogota, Boston, New York GMT-5|
+3600|Canada, Santiago, Atlantic Standard Time GMT-4|
+7200|Brazilia, Buenos Aires, Georgetown, Greenland GMT-3|
+10800|Mid-Atlantic GMT-2|
+14400|Azores, Cape Verde Is., Western Africa Time GMT-1|
+18000|London, Iceland, Ireland, Morocco, Portugal GMT|
+21600|Amsterdam, Berlin, Bern, Madrid, Paris, Rome, GMT+1|
+25200|Athens, Cairo, Cape Town, Finland, Greece, Israel GMT+2|
+28800|Ankara, Aden, Baghdad, Beruit, Kuwait, Moscow GMT+3|
+32400|Abu Dhabi, Baku, Kabul, Tehran, Tbilisi, Volgograd GMT+4|
+36000|Calcutta, Colombo, Islamabad, Madras, New Dehli GMT+5|
+39600|Almaty, Dhakar, Kathmandu, Colombo, Sri Lanka GMT+6|
+43200|Bangkok, Hanoi, Jakarta, Phnom Penh, Australia GMT+7|
+46800|Taipei, Beijing, Hong Kong, Singapore, GMT+8|
+50400|Seoul, Tokyo, Central Australia GMT+9|
+54000|Brisbane, Canberra, Guam, Melbourne, Sydney, GMT+10|
+57600|Magadan, New Caledonia, Solomon Is. GMT+11|
+61200|Auckland, Fiji, Kamchatka, Marshall, Wellington, GMT+12|
date_default_timezone_set
(PHP 5 >= 5.1.0)
date_default_timezone_set — Définit le décalage horaire par défaut de toutes les fonctions date/heure
Description
bool date_default_timezone_set
( string $timezone_identifier
)
date_default_timezone_set() définit le décalage horaire par défaut utilisé par toutes les fonctions date/heure.
Note: Depuis PHP 5.1.0 (lorsque les fonctions date/heure ont été écrites), chaque appel à une fonction date/heure génère une E_NOTICE si le décalage horaire n'est pas valide et/ou un message E_WARNING si vous utilisez des configurations système ou la variable d'environnement TZ.
Au lieu d'utiliser cette fonction pour définir le décalage horaire par défaut dans votre script, vous pouvez également utiliser la configuration INI date.timezone.
Liste de paramètres
- timezone_identifier
-
L'identifiant de décalage horaire, comme UTC ou Europe/Lisbon. La liste des identifiants valides est disponible dans le Liste des Fuseaux Horaires Supportés.
Valeurs de retour
Cette fonction retourne FALSE si timezone_identifier n'est pas valide, TRUE sinon.
Exemples
Exemple #1 Récupération du décalage horaire par défaut
<?php
date_default_timezone_set('America/Los_Angeles');
$script_tz = date_default_timezone_get();
if (strcmp($script_tz, ini_get('date.timezone'))){
echo 'Le décalage horaire du script diffère du décalage horaire défini dans le fichier ini.';
} else {
echo 'Le décalage horaire du script est équivalent à celui défini dans le fichier ini.';
}
?>
Historique
| Version | Description |
|---|---|
| 5.3.0 | Émet maintenant une alerte de type E_WARNING plutôt qu'une alerte de type E_STRICT. |
| 5.1.2 | La fonction commence à valider le paramètre timezone_identifier . |
Voir aussi
- date_default_timezone_get() - Récupère le décalage horaire par défaut utilisé par toutes les fonctions date/heure dans un script
add a note
User Contributed Notesdate_default_timezone_set
ted dot chou12 at gmail dot com
03-Dec-2008 08:13
03-Dec-2008 08:13
jason at jasonpriem dot com
12-Nov-2008 05:29
12-Nov-2008 05:29
While it's easy to change timezones based on names or abbreviations, I haven't found any straightforward way of doing so using an offset integer. This situation comes up if you're using AJAX to get information about a user's timezone; javascript's getTimezoneOffset() method just sends you an offset number. So, here's my clunky solution: an adaptation of chris' function at http://us.php.net/manual/en/function.timezone-name-from-abbr.php.
<?php
function set_tz_by_offset($offset) {
$abbrarray = timezone_abbreviations_list();
foreach ($abbrarray as $abbr) {
foreach ($abbr as $city) {
if ($city['offset'] == $offset) { // remember to multiply $offset by -1 if you're getting it from js
date_default_timezone_set($city['timezone_id']);
return true;
}
}
}
date_default_timezone_set("ust");
return false;
}
?>
Anonymous
28-Sep-2008 07:34
28-Sep-2008 07:34
If you have problems with errors, why the default is not set use this on the top of the script:
<?php
if(function_exists("date_default_timezone_set") and function_exists("date_default_timezone_get"))
@date_default_timezone_set(@date_default_timezone_get());
?>
Rob Kaper
15-Jul-2008 10:46
15-Jul-2008 10:46
If you want users to choose their own timezones, here's some code that gets all available timezones but only uses one city for each possible value:
<?php
$timezones = DateTimeZone::listAbbreviations();
$cities = array();
foreach( $timezones as $key => $zones )
{
foreach( $zones as $id => $zone )
{
/**
* Only get timezones explicitely not part of "Others".
* @see http://www.php.net/manual/en/timezones.others.php
*/
if ( preg_match( '/^(America|Antartica|Arctic|Asia|Atlantic|Europe|Indian|Pacific)\//', $zone['timezone_id'] ) )
$cities[$zone['timezone_id']][] = $key;
}
}
// For each city, have a comma separated list of all possible timezones for that city.
foreach( $cities as $key => $value )
$cities[$key] = join( ', ', $value);
// Only keep one city (the first and also most important) for each set of possibilities.
$cities = array_unique( $cities );
// Sort by area/city name.
ksort( $cities );
?>
PeerGoal.com
12-Feb-2007 01:21
12-Feb-2007 01:21
The problem:
date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Los_Angeles' for 'PST/-8.0/no DST' instead
Of course this is a problem that recently surfaced since PHP5. Quick fix is to set your time zone, add this line to your php code:
date_default_timezone_set("America/Los_Angeles");
davidn at datalinktech dot com dot au
22-Dec-2006 02:27
22-Dec-2006 02:27
Note that there may be some unexpected side-effects that result from using either set_default_timezone() or the putenv("TZ=...") workalike for earlier PHP versions. ANY date formatted and output either by PHP or its apache host process will be unconditionally expressed in that timezone.
[red. That is only true for the putenv() hack - Derick]
This does indeed include the web server's logs and other output files and reports which by default usually do not include any indication of timezone. This has a further side-effect on log processing and analysis, obviously.