php set date default timezone set php

DateTime::setTimezone

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

Описание

Список параметров

Возвращаемые значения

Возвращает объект DateTime для связывания методов.

Примеры

Пример #1 Пример использования DateTime::setTimeZone()

Результат выполнения данных примеров:

Смотрите также

User Contributed Notes 6 notes

In response to the other comments expressing surprise that changing the timezone does not affect the timestamp:

A UNIX timestamp is defined as the number of seconds that have elapsed since 00:00:00 (UTC), Thursday, 1 January 1970.

So: with respect to UTC. Always.

Calling setTimezone() never changes the actual «absolute», underlying, moment-in-time itself. It only changes the timezone you wish to «view» that moment «from». Consider the following:

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:
= new DateTimeZone ( ‘America/Denver’ );
$ESTTZ = new DateTimeZone ( ‘America/New_York’ );

= new DateTimeZone ( ‘America/Denver’ );
$ESTTZ = new DateTimeZone ( ‘America/New_York’ );

It appears that what forzi at mail333 dot com said is correct.

In any case, other output values from format() seem to be accurate, and the true timestamp is always accessible via getTimestamp().

I found unexpected behaviour when passing a timestamp.
timezone seems to always be GMT+0000 unless setTimezone() is set.

= new DateTimeZone ( ‘America/Denver’ );
$ts = 1336476757 ;

/** Output:
string(8) «GMT+0000»
string(10) «1336476757»
string(3) «MDT»
string(10) «1336476757»
**/

Источник

Php set date default timezone set php

(PHP 4, PHP 5, PHP 7, PHP 8)

date — Форматирует вывод системной даты/времени

Описание

Список параметров

Возвращаемые значения

Ошибки

Список изменений

Примеры

Пример #1 Примеры использования функции date()

// установка часового пояса по умолчанию.
date_default_timezone_set ( ‘UTC’ );

// выведет примерно следующее: Monday
echo date ( «l» );

// выведет примерно следующее: Monday 8th of August 2005 03:12:46 PM
echo date ( ‘l jS \of F Y h:i:s A’ );

/* пример использования константы в качестве форматирующего параметра */
// выведет примерно следующее: Mon, 15 Aug 2005 15:12:46 UTC
echo date ( DATE_RFC822 );

Чтобы запретить распознавание символа как форматирующего, следует экранировать его с помощью обратного слеша. Если экранированный символ также является форматирующей последовательностью, то следует экранировать его повторно.

Пример #2 Экранирование символов в функции date()

Пример #3 Пример совместного использования функций date() и mktime()

Данный способ более надёжен, чем простое вычитание и прибавление секунд к метке времени, поскольку позволяет при необходимости гибко осуществить переход на летнее/зимнее время.

Пример #4 Форматирование с использованием date()

// Предположим, что текущей датой является 10 марта 2001, 5:16:18 вечера,
// и мы находимся в часовом поясе Mountain Standard Time (MST)

$today = date ( «F j, Y, g:i a» ); // March 10, 2001, 5:16 pm
$today = date ( «m.d.y» ); // 03.10.01
$today = date ( «j, n, Y» ); // 10, 3, 2001
$today = date ( «Ymd» ); // 20010310
$today = date ( ‘h-i-s, j-m-y, it is w Day’ ); // 05-16-18, 10-03-01, 1631 1618 6 Satpm01
$today = date ( ‘\i\t \i\s \t\h\e jS \d\a\y.’ ); // it is the 10th day.
$today = date ( «D M j G:i:s T Y» ); // Sat Mar 10 17:16:18 MST 2001
$today = date ( ‘H:m:s \m \i\s\ \m\o\n\t\h’ ); // 17:03:18 m is month
$today = date ( «H:i:s» ); // 17:16:18
$today = date ( «Y-m-d H:i:s» ); // 2001-03-10 17:16:18 (формат MySQL DATETIME)
?>

Примечания

Смотрите также

User Contributed Notes 20 notes

Things to be aware of when using week numbers with years.

Conclusion:
if using ‘W’ for the week number use ‘o’ for the year.

In order to define leap year you must considre not only that year can be divide by 4!

The correct alghoritm is:

if (year is not divisible by 4) then (it is a common year)
else if (year is not divisible by 100) then (it is a leap year)
else if (year is not divisible by 400) then (it is a common year)
else (it is a leap year)

So the code should look like this:

For Microseconds, we can get by following:

echo date(‘Ymd His’.substr((string)microtime(), 1, 8).’ e’);

FYI: there’s a list of constants with predefined formats on the DateTime object, for example instead of outputting ISO 8601 dates with:

echo date ( ‘Y-m-d\TH:i:sO’ );
?>

You can use

echo date ( DateTime :: ISO8601 );
?>

instead, which is much easier to read.

this how you make an HTML5 tag correctly

It’s common for us to overthink the complexity of date/time calculations and underthink the power and flexibility of PHP’s built-in functions. Consider http://php.net/manual/en/function.date.php#108613

date() will format a time-zone agnostic timestamp according to the default timezone set with date_default_timezone_set(. ). Local time. If you want to output as UTC time use:

$tz = date_default_timezone_get ();
date_default_timezone_set ( ‘UTC’ );

For HTML5 datetime-local HTML input controls (http://www.w3.org/TR/html-markup/input.datetime-local.html) use format example: 1996-12-19T16:39:57

To generate this, escape the ‘T’, as shown below:

If timestamp is a string, date converts it to an integer in a possibly unexpected way:

The example below formats today’s date in three different ways:

The following function will return the date (on the Gregorian calendar) for Orthodox Easter (Pascha). Note that incorrect results will be returned for years less than 1601 or greater than 2399. This is because the Julian calendar (from which the Easter date is calculated) deviates from the Gregorian by one day for each century-year that is NOT a leap-year, i.e. the century is divisible by 4 but not by 10. (In the old Julian reckoning, EVERY 4th year was a leap-year.)

This algorithm was first proposed by the mathematician/physicist Gauss. Its complexity derives from the fact that the calculation is based on a combination of solar and lunar calendars.

At least in PHP 5.5.38 date(‘j.n.Y’, 2222222222) gives a result of 2.6.2040.

So date is not longer limited to the minimum and maximum values for a 32-bit signed integer as timestamp.

Prior to PHP 5.6.23, Relative Formats for the start of the week aligned with PHP’s (0=Sunday,6=Saturday). Since 5.6.23, Relative Formats for the start of the week align with ISO-8601 (1=Monday,7=Sunday). (http://php.net/manual/en/datetime.formats.relative.php)

This can produce different, and seemingly incorrect, results depending on your PHP version and your choice of ‘w’ or ‘N’ for the Numeric representation of the day of the week:

Prior to PHP 5.6.23, this results in:

Today is Sun 2 Oct 2016, day 0 of this week. Day 1 of next week is 10 Oct 2016
Today is Sun 2 Oct 2016, day 7 of this week. Day 1 of next week is 10 Oct 2016

Since PHP 5.6.23, this results in:

Today is Sun 2 Oct 2016, day 0 of this week. Day 1 of next week is 03 Oct 2016
Today is Sun 2 Oct 2016, day 7 of this week. Day 1 of next week is 03 Oct 2016

I’ve tested it pretty strenuously but date arithmetic is complicated and there’s always the possibility I missed something, so please feel free to check my math.

The function could certainly be made much more powerful, to allow you to set different days to be ignored (e.g. «skip all Fridays and Saturdays but include Sundays») or to set up dates that should always be skipped (e.g. «skip July 4th in any year, skip the first Monday in September in any year»). But that’s a project for another time.

$start = strtotime ( «1 January 2010» );
$end = strtotime ( «13 December 2010» );

// Add as many holidays as desired.
$holidays = array();
$holidays [] = «4 July 2010» ; // Falls on a Sunday; doesn’t affect count
$holidays [] = «6 September 2010» ; // Falls on a Monday; reduces count by one

?>

Or, if you just want to know how many work days there are in any given year, here’s a quick function for that one:

Источник

date_default_timezone_get — Возвращает временную зону, используемой по умолчанию всеми функциями даты/времени в скрипте

Описание

Функция пытается получить временную зону по умолчанию по порядку следующими способами:

Чтение настройки временной зоны с помощью функции date_default_timezone_set() (если применимо)

Только до версии PHP 5.4.0: чтение переменной окружения TZ (если она не пуста)

Чтение значения ini настройки date.timezone (если задана)

Только до версии PHP 5.4.0: опрос операционной системы (если поддерживается и разрешено ОС). При этом используется механизм угадывания временной зоны. Этот механизм не всегда корректно работает. Если используется этот метод (все предыдущие не дали результата), будет выдано предупреждение. Не стоит полагаться на результат, полученный этим способом, вместо этого лучше задать в параметрах временной зоны date.timezone правильное значение.

Если ни один из способов не принес результата, date_default_timezone_get() вернет временную зону UTC.

Возвращаемые значения

Список изменений

Примеры

Пример #1 Получение временной зоны по умолчанию

Результатом выполнения данного примера будет что-то подобное:

Пример #2 Получение аббревиатуры временной зоны

Источник

PHP date_default_timezone_set() Eastern Standard Time (EST)

Long story short

Is there an official, un-deprecated timezone that PHP5 recognizes for Eastern STANDARD time—not Eastern DAYLIGHT time?

Short story long 😛

Wow, I can’t believe that PHP makes such a cluster-floogen out of setting the time.

I would like to use PHP5’s date_default_timezone_set() to set the timezone for my script. I want to use standard time. I do not want my script to observe daylight savings time. I do not want to have to use gmtime() and subtract 60*60*5 seconds each time my program writes a time. I don’t want to save that value to a variable either. Setting the default timezone is more elegant and makes the script more portable to other servers and locales.

Unfortunately PHP requires I use one of their stupid «official timezones» when setting the default time zone. There is an «America/New_York» but I have no idea if it or any of the official PHP timezones observe Daylight savings time. Through experimentation, I discovered that «America/New_York» does observe DST. «America/Panama» is EST and thus does not observe DST. but what if Panama should ever change their mind about DST in the future? (They observed DST in 1908)

Because Panama could always change their mind; I just want to use the GMT or UTC offset.

Then there is this.

The above link list what I am assuming are deprecated timezones. «EST» is in there but is very USA-centric so I understand why it is deprecated. «Ect/GMT-5» is there too and I have absolutely no idea why that is deprecated. If you ask me, all the place name timezones should be deprecated and the GMT timezones un-deprecated. but get this. «Ect/GMT-5» is actually wrong! I had to use «Ect/GMT+5» to get USA’s Eastern Standard Time. I’m pretty sure I’m not 5 hours ahead of England here on the East Coast.

Answered?

No one really answered the question. So I guess I’ll answer it myself. «No, there is no, un-deprecated timezone that PHP5 recognizes for Eastern STANDARD time»

A lot of folks told me I that should store dates as UTC time and translate them to local time when I pull them out of storage—something I already know. The problem is, I was hired to only fix this little part of the script and I doubt the guy is going to let me re-write his whole code which he’s been using since the dawn of PHP supposedly.

I will reluctantly give credit to the dude who shows you how to correctly store and retrieve times so future folks searching for this learn how to do this the right way.

Источник

MYSQL set timezone in PHP code

How can I change MYSQL TIMEZONE to GMT format like this function in PHP: /SET GMT TIMEZONE/ date_default_timezone_set(‘Etc/GMT’);

My DB class is here:

And my queries like this in other files:

Where should I insert my query to the class for run it once?

4 Answers 4

Using named timezones will only work if the time zone information tables in the MySQL database have been created and populated.

After you write this:

This timezone setting will apply to all future queries sent on that connection.

Also, ensure you’ve set up the zone tables in the mysql database.

Per-connection time zones. Each client that connects has its own time zone setting, given by the session time_zone variable. Initially, the session variable takes its value from the global time_zone variable, but the client can change its own time zone with this statement:

So must be like this;

MySQL has extensive timezone support. You can set it on server level, on a per connection basis and even per query. I think executing ‘SET time_zone = xxx’ in __construct is enough for you.

Not the answer you’re looking for? Browse other questions tagged php mysql timezone or ask your own question.

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