UTC日期/时间字符串到时区

Question

如何将UTC日期/时间字符串(例如2011-01-01 15:00:00)转换为php支持的任何给定时区，例如America/New_York或Europe/San_Marino。

Answer 1

PHP的DateTime对象是非常灵活的。

$UTC = new DateTimeZone("UTC");
$newTZ = new DateTimeZone("America/New_York");
$date = new DateTime( "2011-01-01 15:00:00", $UTC );
$date->setTimezone( $newTZ );
echo $date->format('Y-m-d H:i:s');

Answer 2

PHP的DateTime对象是相当灵活的。

由于用户要求多个时区选项，那么您可以将其设置为通用的。

泛型函数

function convertDateFromTimezone($date,$timezone,$timezone_to,$format){
 $date = new DateTime($date,new DateTimeZone($timezone));
 $date->setTimezone( new DateTimeZone($timezone_to) );
 return $date->format($format);
}

用法:

echo  convertDateFromTimezone('2011-04-21 13:14','UTC','America/New_York','Y-m-d H:i:s');

输出:

2011-04-21 09:14:00

Answer 3

假设UTC不包含在字符串中，那么:

date_default_timezone_set('America/New_York');
$datestring = '2011-01-01 15:00:00';  //Pulled in from somewhere
$date = date('Y-m-d H:i:s T',strtotime($datestring . ' UTC'));
echo $date;  //Should get '2011-01-01 10:00:00 EST' or something like that

或者您可以使用DateTime对象

Answer 4

function _settimezone($time,$defaultzone,$newzone)
{
$date = new DateTime($time, new DateTimeZone($defaultzone));
$date->setTimezone(new DateTimeZone($newzone));
$result=$date->format('Y-m-d H:i:s');
return $result;
}
$defaultzone="UTC";
$newzone="America/New_York";
$time="2011-01-01 15:00:00";
$newtime=_settimezone($time,$defaultzone,$newzone);

Answer 5

将时间戳从任何时区格式化为其他时区的通用规范化函数。对于在关系数据库中存储来自不同时区的用户的日期时间戳非常有用。对于数据库比较，将时间戳存储为UTC并与gmdate('Y-m-d H:i:s')

一起使用

/**
 * 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;
    }
}

用法:

$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"

Answer 6

如何:

$timezone = new DateTimeZone('UTC');
$date = new DateTime('2011-04-21 13:14', $timezone);
echo $date->format;