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 — Sets the default timezone used by all date/time functions in a script
Opis
bool date_default_timezone_set
( string $timezone_identifier
)
date_default_timezone_set() sets the default timezone used by all date/time functions.
Informacja: Since PHP 5.1.0 (when the date/time functions were rewritten), every call to a date/time function will generate a E_NOTICE if the timezone isn't valid, and/or a E_WARNING message if using the system settings or the TZ environment variable.
Instead of using this function to set the default timezone in your script, you can also use the INI setting date.timezone to set the default timezone.
Parametry
- timezone_identifier
-
The timezone identifier, like UTC or Europe/Lisbon. The list of valid identifiers is available in the Lista obsługiwanych stref czasowych.
Zwracane wartości
This function returns FALSE if the timezone_identifier isn't valid, or TRUE otherwise.
Przykłady
Przykład #1 Getting the default timezone
<?php
date_default_timezone_set('America/Los_Angeles');
$script_tz = date_default_timezone_get();
if (strcmp($script_tz, ini_get('date.timezone'))){
echo 'Script timezone differs from ini-set timezone.';
} else {
echo 'Script timezone and ini-set timezone match.';
}
?>
Rejestr zmian
| Wersja | Opis |
|---|---|
| 5.3.0 | Now throws E_WARNING rather then E_STRICT. |
| 5.1.2 | The function started to validate the timezone_identifier parameter. |
Zobacz też:
- date_default_timezone_get() - Gets the default timezone used by all date/time functions in a script
- Lista obsługiwanych stref czasowych
add a note
User Contributed Notesdate_default_timezone_set
ted dot chou12 at gmail dot com
03-Dec-2008 07:13
03-Dec-2008 07:13
jason at jasonpriem dot com
12-Nov-2008 04:29
12-Nov-2008 04:29
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 05:34
28-Sep-2008 05:34
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 08:46
15-Jul-2008 08:46
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 );
?>
php_manual at lk2 dot de
12-Aug-2007 08:37
12-Aug-2007 08:37
@davidn at datalinktech dot com dot au
set_default_timezone() has no effect at all on how apache logs are timestamped (at least for me)
[red. that's untrue if you set the TZ env var... that will affect Apache as well - Derick]
It is however true, that all dates and times that php formats that are _not_ timestamps will be in that timezone.
Timestamps are always GMT
PeerGoal.com
12-Feb-2007 12:21
12-Feb-2007 12:21
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 01:27
22-Dec-2006 01:27
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.