Convert date time to utc php

I am in need of an easy way to convert a date time stamp to UTC [from whatever timezone the server is in] HOPEFULLY without using any libraries.

asked Jan 19, 2010 at 17:55

0

Use strtotime to generate a timestamp from the given string [interpreted as local time] and use gmdate to get it as a formatted UTC date back.

Example

As requested, here’s a simple example:

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

answered Jan 19, 2010 at 18:06

pokepoke

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12

Using DateTime:

$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

answered Dec 12, 2014 at 7:24

joerxjoerx

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2

Try the getTimezone and setTimezone, see the example

[But this does use a Class]

UPDATE:

Without any classes you could try something like this:

$the_date = strtotime["2010-01-19 00:00:00"];
echo[date_default_timezone_get[] . "
"];
echo[date["Y-d-mTG:i:sz",$the_date] . "
"];
echo[date_default_timezone_set["UTC"] . "
"];
echo[date["Y-d-mTG:i:sz", $the_date] . "
"];

NOTE: You might need to set the timezone back to the original as well

answered Jan 19, 2010 at 18:08

Phill PaffordPhill Pafford

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7

Do this way:

gmdate['Y-m-d H:i:s', $timestamp]

or simply

gmdate['Y-m-d H:i:s']

to get "NOW" in UTC.

Check the reference:

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

laurent

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answered Jul 3, 2011 at 5:32

AttilioAttilio

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0

If you have a date in this format YYYY-MM-HH dd:mm:ss, you can actually trick php by adding a UTC at the end of your "datetime string" and use strtotime to convert it.

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";

This will print this:

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

And as you can see it takes care of the daylight savings time problem as well.

A little strange way to solve it.... :]

answered Feb 14, 2010 at 21:50

JohanJohan

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3

Convert local time zone string to UTC string.
e.g. New Zealand Time Zone

$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";
  if $datetime = "2016-02-29 23:59:59", $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";
  

//en.wikipedia.org/wiki/Time_in_New_Zealand

answered May 4, 2016 at 5:32

Frank HouFrank Hou

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0

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']];
   

answered Dec 17, 2018 at 10:00

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];

answered Aug 18, 2012 at 19:17

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.

answered Apr 16, 2012 at 14:46

aorcsikaorcsik

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1

answered Jan 19, 2010 at 18:06

psychotikpsychotik

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With PHP 5 or superior, you may use datetime::format function [see documentation //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

answered Aug 9, 2012 at 11:05

MUY BelgiumMUY Belgium

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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

answered Oct 18, 2011 at 16:42

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"

answered Dec 9, 2016 at 5:26

SandeepSandeep

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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...]:

answered Sep 11, 2017 at 17:31

2

alternatively you can try this:

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.

answered Oct 25, 2017 at 9:16

Bruce TongBruce Tong

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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]
   

answered Nov 9, 2018 at 10:16

Pradeep KumarPradeep Kumar

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