Question

我正在尝试转换从youtube api视频Feed收到的时间戳。收到的时间戳为2013-01-11T06:45:52.000Z。我认为这是GMT时间戳（如果我错了，请纠正我）。我写了一个函数来将时间戳转换为IST。

function formatTime($ydatetime) {
    $timestamp = explode("T", $ydatetime);
    $date = $timestamp[0];
    $gmtime = substr($timestamp[1], 0, 8);
    $gmtimestamp = $date . " " . $gmtime;
    $datetime = new DateTime($gmtimestamp, new DateTimeZone('GMT'));
    $datetime->setTimezone(new DateTimeZone('IST'));
    return $datetime->format('Y-m-d H:i:s');
}

但它将时间戳记返回2013-01-11 08:45:52，其中差异仅为2小时。 GMT和IST之间的实际差异是5.30小时。请有人帮助我。

Answer 1

你有没有尝试过时区“亚洲/加尔各答”或

http://php.net/manual/en/timezones.indian.php

中的任何一个

Answer 2

尝试

function formatTime($ydatetime) {
   date_default_timezone_set('Asia/Kolkata'); //<--This will set the timezone to IST
   $str = strtotime($ydatetime);
   return date('Y-m-d H:i:s', $str);
}

Answer 3

试

echo date('Y-m-d H:i:s',strtotime('+330 minutes', 0));

或

date_default_timezone_set('Asia/Kolkata');
  echo date('Y-m-d H:i:s');

首先得到时间

$time = new DateTime('now', new DateTimeZone('UTC'));
    // then convert it to IST by
    $time->setTimezone(new DateTimeZone('IST'));

Answer 4

我遇到了同样的问题，希望将GMT转换为IST。这个对我有用：

$date = new DateTime('2018-04-08T14:30:00.000Z', new DateTimeZone('GMT'));
$date->setTimezone(new DateTimeZone('Asia/Kolkata'));
echo $date->format('Y-m-d H:i:s');

如果有人在将来遇到同样的问题，我想分享一下：）

Answer 5

我最近发现PHP没有内置函数可以在多个时区之间转换时间/日期，因此我也找不到第三方函数。但是，我的确找到了PEAR类，该类具有对多个时区的内置支持，但是无法在php页面中“包含”自身使用。 PEAR类只能在安装后使用，这在每种情况下都不可行。为了避免安装麻烦，我用PHP编写了3个函数集，这些函数可以让您–

将GMT转换为本地时区
将本地时区转换为GMT

在两个不同的时区之间进行转换。

/**
 *Convert the time in GMT timestamp into  user's local time zone timestamp
 * @param time $gmttime
 * @param string $timezoneRequired
 * $gmttime should be in timestamp format like '02-06-2009 09:48:00.000'
 * $timezoneRequired sholud be a string like 'Asia/Calcutta' not 'IST' or 'America/Chicago' not 'CST'
 * return timestamp format like '02-06-2009 09:48:00' (m-d-Y H:i:s) Can also change this format
 * $timestamp = $date->format("m-d-Y H:i:s"); decide the return format                      
*/


function ConvertGMTToLocalTimezone($gmttime,$timezoneRequired)
{
    $system_timezone = date_default_timezone_get();

    date_default_timezone_set("GMT");
    $gmt = date("Y-m-d h:i:s A");

    $local_timezone = $timezoneRequired;
    date_default_timezone_set($local_timezone);
    $local = date("Y-m-d h:i:s A");

    date_default_timezone_set($system_timezone);
    $diff = (strtotime($local) - strtotime($gmt));

    $date = new DateTime($gmttime);
    $date->modify("+$diff seconds");
    $timestamp = $date->format("m-d-Y H:i:s");
    return $timestamp;
}

/**
*Use: ConvertGMTToLocalTimezone('2009-02-05 11:54:00.000','Asia/Calcutta');
*Output: 02-05-2009 17:24:00 || IST = GMT+5.5
*/
 /**
 *Convert the time in user's local time zone timestamp into GMT timestamp  
 * @param time $gmttime
 * @param string $timezoneRequired
 * $gmttime should be in timestamp format like '02-06-2009 09:48:00.000'
 * $timezoneRequired sholud be a string like 'Asia/Calcutta' not 'IST' or 'America/Chicago' not 'CST'
 * return timestamp format like '02-06-2009 09:48:00' (m-d-Y H:i:s) Can also change this format
 * $timestamp = $date->format("m-d-Y H:i:s"); decide the return format Date:06/02/2009
*/

function ConvertLocalTimezoneToGMT($gmttime,$timezoneRequired)
{
    $system_timezone = date_default_timezone_get();

    $local_timezone = $timezoneRequired;
    date_default_timezone_set($local_timezone);
    $local = date("Y-m-d h:i:s A");

    date_default_timezone_set("GMT");
    $gmt = date("Y-m-d h:i:s A");

    date_default_timezone_set($system_timezone);
    $diff = (strtotime($gmt) - strtotime($local));

    $date = new DateTime($gmttime);
    $date->modify("+$diff seconds");
    $timestamp = $date->format("m-d-Y H:i:s");
    return $timestamp;
}

/**
*Use: ConvertLocalTimezoneToGMT('2009-02-05 17:24:00.000','Asia/Calcutta');
*Output: 02-05-2009 11:54:00 ||  GMT = IST-5.5
*/




/**
 *Convert the time in user's local time zone timestamp into another time zone timestamp
 * @param time $gmttime
 * @param string $timezoneRequired
 * $gmttime should be in timestamp format like '02-06-2009 09:48:00.000'
 * $timezoneRequired sholud be a string like 'Asia/Calcutta' not 'IST' or 'America/Chicago' not 'CST'
 * return timestamp format like '02-06-2009 09:48:00' (m-d-Y H:i:s) Can also change this format
 * $timestamp = $date->format("m-d-Y H:i:s"); decide the return format Date:06/02/2009.
*/


function ConvertOneTimezoneToAnotherTimezone($time,$currentTimezone,$timezoneRequired)
{
    $system_timezone = date_default_timezone_get();
    $local_timezone = $currentTimezone;
    date_default_timezone_set($local_timezone);
    $local = date("Y-m-d h:i:s A");

    date_default_timezone_set("GMT");
    $gmt = date("Y-m-d h:i:s A");

    $require_timezone = $timezoneRequired;
    date_default_timezone_set($require_timezone);
    $required = date("Y-m-d h:i:s A");

    date_default_timezone_set($system_timezone);

    $diff1 = (strtotime($gmt) - strtotime($local));
    $diff2 = (strtotime($required) - strtotime($gmt));

    $date = new DateTime($time);
    $date->modify("+$diff1 seconds");
    $date->modify("+$diff2 seconds");
    $timestamp = $date->format("m-d-Y H:i:s");
    return $timestamp;
}



/**
*Use: ConvertLocalTimezoneToGMT('2009-02-05 17:24:00.000','Asia/Calcutta','America/Chicago');
*Output: 02-05-2009 05:54:00 ||  IST = GMT+5.5, CST = GMT-6 || IST - CST = 11.5
*/

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将GMT时间转换为IST

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