PHP는 datetime을 UTC로 변환

PHP는 datetime을 UTC로 변환

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라이브러리를 사용하지 않고 HOPEFULLY (서버가있는 시간대에 관계없이) 날짜 타임 스탬프를 UTC로 변환하는 쉬운 방법이 필요합니다.

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getTimezone 및 setTimezone을 시도하고 예제를 참조하십시오.

(하지만 이것은 클래스를 사용합니다)

최신 정보:

수업이 없으면 다음과 같이 시도 할 수 있습니다.

$the_date = strtotime("2010-01-19 00:00:00");
echo(date_default_timezone_get() . "<br />");
echo(date("Y-d-mTG:i:sz",$the_date) . "<br />");
echo(date_default_timezone_set("UTC") . "<br />");
echo(date("Y-d-mTG:i:sz", $the_date) . "<br />");

참고 : 시간대를 원래대로 다시 설정해야 할 수도 있습니다.

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strtotime 을 사용 하여 주어진 문자열 (현지 시간으로 해석 됨)에서 타임 스탬프를 생성하고 gmdate 를 사용 하여 형식화 된 UTC 날짜로 되돌립니다.

예

요청에 따라 다음은 간단한 예입니다.

echo gmdate('d.m.Y H:i', strtotime('2012-06-28 23:55'));

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DateTime 사용 :

$given = new DateTime("2014-12-12 14:18:00");
echo $given->format("Y-m-d H:i:s e") . "\n"; // 2014-12-12 14:18:00 Asia/Bangkok

$given->setTimezone(new DateTimeZone("UTC"));
echo $given->format("Y-m-d H:i:s e") . "\n"; // 2014-12-12 07:18:00 UTC

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다음과 같이하십시오.

gmdate('Y-m-d H:i:s', $timestamp)

또는 간단히

gmdate('Y-m-d H:i:s')

UTC로 "NOW"를 얻으려면.

참조 확인 :

http://www.php.net/manual/en/function.gmdate.php

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이 형식의 날짜가 YYYY-MM-HH dd : mm : ss 인 경우 실제로 "datetime 문자열"끝에 UTC를 추가하고 strtotime을 사용하여 변환하여 PHP를 속일 수 있습니다.

date_default_timezone_set('Europe/Stockholm');
print date('Y-m-d H:i:s',strtotime("2009-01-01 12:00"." UTC"))."\n";
print date('Y-m-d H:i:s',strtotime("2009-06-01 12:00"." UTC"))."\n";

다음과 같이 인쇄됩니다.

2009-01-01 13:00:00
2009-06-01 14:00:00

보시다시피 일광 절약 시간 문제도 처리합니다.

그것을 해결하는 약간 이상한 방법 .... :)

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현지 시간대 문자열을 UTC 문자열로 변환합니다.
예 : 뉴질랜드 시간대

$datetime = "2016-02-01 00:00:01";
$given = new DateTime($datetime, new DateTimeZone("Pacific/Auckland"));
$given->setTimezone(new DateTimeZone("UTC"));
$output = $given->format("Y-m-d H:i:s"); 
echo ($output);

• NZDT : UTC + 13 : 00
  if $ datetime = "2016-02-01 00:00:01", $ output = "2016-01-31 11:00:01";
  $ datetime = "2016-02-29 23:59:59"이면 $ output = "2016-02-29 10:59:59";
  
• NZST: UTC+12:00
  if $datetime = "2016-05-01 00:00:01", $output = "2016-04-30 12:00:01";
  if $datetime = "2016-05-31 23:59:59", $output = "2016-05-31 11:59:59";
  

https://en.wikipedia.org/wiki/Time_in_New_Zealand

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As strtotime requires specific input format, DateTime::createFromFormat could be used (php 5.3+ is required)

// set timezone to user timezone
date_default_timezone_set($str_user_timezone);

// create date object using any given format
$date = DateTime::createFromFormat($str_user_dateformat, $str_user_datetime);

// convert given datetime to safe format for strtotime
$str_user_datetime = $date->format('Y-m-d H:i:s');

// convert to UTC
$str_UTC_datetime = gmdate($str_server_dateformat, strtotime($str_user_datetime));

// return timezone to server default
date_default_timezone_set($str_server_timezone);

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I sometime use this method:

// It is not importnat what timezone your system is set to.
// Get the UTC offset in seconds:
$offset = date("Z");

// Then subtract if from your original timestamp:
$utc_time = date("Y-m-d H:i:s", strtotime($original_time." -".$offset." Seconds"));

Works all MOST of the time.

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If you don't mind using PHP's DateTime class, which has been available since PHP 5.2.0, then there are several scenarios that might fit your situation:

1. If you have a $givenDt DateTime object that you want to convert to UTC then this will convert it to UTC:

   $givenDt->setTimezone(new DateTimeZone('UTC'));
   

2. If you need the original $givenDt later, you might alternatively want to clone the given DateTime object before conversion of the cloned object:

   $utcDt = clone $givenDt;
   $utcDt->setTimezone(new DateTimeZone('UTC'));
   

3. If you only have a datetime string, e.g. $givenStr = '2018-12-17 10:47:12', then you first create a datetime object, and then convert it. Note this assumes that $givenStr is in PHP's configured timezone.

   $utcDt = (new DateTime($givenStr))->setTimezone(new DateTimeZone('UTC'));
   

4. If the given datetime string is in some timezone different from the one in your PHP configuration, then create the datetime object by supplying the correct timezone (see the list of timezones PHP supports). In this example we assume the local timezone in Amsterdam:

   $givenDt = new DateTime($givenStr, new DateTimeZone('Europe/Amsterdam'));
   $givenDt->setTimezone(new DateTimeZone('UTC'));
   

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http://php.net/manual/en/function.strtotime.php or if you need to not use a string but time components instead, then http://us.php.net/manual/en/function.mktime.php

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With PHP 5 or superior, you may use datetime::format function (see documentation http://us.php.net/manual/en/datetime.format.php)

 echo strftime( '%e %B %Y' , 
    date_create_from_format('Y-d-m G:i:s', '2012-04-05 11:55:21')->format('U')
    );  // 4 May 2012

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Follow these steps to get UTC time of any timezone set in user's local system (This will be required for web applications to save different timezones to UTC):

1. Javascript (client-side):

   var dateVar = new Date();
   var offset = dateVar.getTimezoneOffset();
   //getTimezoneOffset - returns the timezone difference between UTC and Local Time
   document.cookie = "offset="+offset;
   

2. Php (server-side):

   public function convert_utc_time($date)
   {
       $time_difference = isset($_COOKIE['offset'])?$_COOKIE['offset']:'';
       if($time_difference != ''){
           $time = strtotime($date);
           $time = $time + ($time_difference*60); //minutes * 60 seconds
           $date = date("Y-m-d H:i:s", $time);
       } //on failure of js, default timezone is set as UTC below
       return $date;
   }
   ..
   ..
   //in my function
   $timezone = 'UTC';
   $date = $this->convert_utc_time($post_date); //$post_date('Y-m-d H:i:s')
   echo strtotime($date. ' '. $timezone)
   

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try

echo date('F d Y', strtotime('2010-01-19 00:00:00'));

will output:

January 19 2010

you should change format time to see other output

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General purpose normalisation function to format any timestamp from any timezone to other. Very useful for storing datetimestamps of users from different timezones in a relational database. For database comparisons store timestamp as UTC and use with gmdate('Y-m-d H:i:s')

/**
 * Convert Datetime from any given olsonzone to other.
 * @return datetime in user specified format
 */

function datetimeconv($datetime, $from, $to)
{
    try {
        if ($from['localeFormat'] != 'Y-m-d H:i:s') {
            $datetime = DateTime::createFromFormat($from['localeFormat'], $datetime)->format('Y-m-d H:i:s');
        }
        $datetime = new DateTime($datetime, new DateTimeZone($from['olsonZone']));
        $datetime->setTimeZone(new DateTimeZone($to['olsonZone']));
        return $datetime->format($to['localeFormat']);
    } catch (\Exception $e) {
        return null;
    }
}

Usage:

$from = ['localeFormat' => "d/m/Y H:i A", 'olsonZone' => 'Asia/Calcutta'];

$to = ['localeFormat' => "Y-m-d H:i:s", 'olsonZone' => 'UTC'];

datetimeconv("14/05/1986 10:45 PM", $from, $to); // returns "1986-05-14 17:15:00"

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As an improvement on Phill Pafford's answer (I did not understand his 'Y-d-mTG:i:sz' and he suggested to revert timezone). So I propose this (I complicated by changing the HMTL format in plain/text...):

<?php
header('content-type: text/plain;');
$my_timestamp = strtotime("2010-01-19 00:00:00");

// stores timezone
$my_timezone = date_default_timezone_get();
echo date(DATE_ATOM, $my_timestamp)."\t ($my_timezone date)\n";

// changes timezone
date_default_timezone_set("UTC");
echo date("Y-m-d\TH:i:s\Z", $my_timestamp)."\t\t (ISO8601 UTC date)\n";
echo date("Y-m-d H:i:s", $my_timestamp)."\t\t (your UTC date)\n";

// reverts change
date_default_timezone_set($my_timezone);
echo date(DATE_ATOM, $my_timestamp)."\t ($my_timezone date is back)\n"; 
?>

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alternatively you can try this:

<?php echo (new DateTime("now", new DateTimeZone('Asia/Singapore')))->format("Y-m-d H:i:s e"); ?>

this will output :

2017-10-25 17:13:20 Asia/Singapore

you can use this inside the value attribute of a text input box if you only want to display a read-only date.

remove the 'e' if you do not wish to show your region/country.

참고URL : https://stackoverflow.com/questions/2095703/php-convert-datetime-to-utc