如何使用DateTime类在PHP中转换时区？

Question

我试图将当前时间与UTC和UTC之间的时间转换为当前时区.

这是我做的:

$schedule_date = new DateTime($triggerOn, new DateTimeZone('UTC') );
$triggerOn =  $schedule_date->format('Y-m-d H:i:s');

echo $triggerOn;

输出值不会更改格式中唯一更改的内容.

字符串$triggerOn是根据America/Los_Angeles时区生成的

这是我的字符串之前和之后的样子:

BEFORE    04/01/2013 03:08 PM
AFTER     2013-04-01 15:08:00

所以这里的问题是DateTime不会转换为UTC.

Answer 1

您正在寻找的是:

$triggerOn = '04/01/2013 03:08 PM';
$user_tz = 'America/Los_Angeles';

echo $triggerOn; // echoes 04/01/2013 03:08 PM

$schedule_date = new DateTime($triggerOn, new DateTimeZone($user_tz) );
$schedule_date->setTimeZone(new DateTimeZone('UTC'));
$triggerOn =  $schedule_date->format('Y-m-d H:i:s');

echo $triggerOn; // echoes 2013-04-01 22:08:00

Answer 2

您正在使用日期/时间并正确设置时区,但在格式化日期时间之前,您没有设置所需的输出时区.以下是接受UTC时区的示例,并将日期/时间转换为America/Los_Angeles时区:

<?php
$original_datetime = '04/01/2013 03:08 PM';
$original_timezone = new DateTimeZone('UTC');

// Instantiate the DateTime object, setting it's date, time and time zone.
$datetime = new DateTime($original_datetime, $original_timezone);

// Set the DateTime object's time zone to convert the time appropriately.
$target_timezone = new DateTimeZone('America/Los_Angeles');
$datetime->setTimeZone($target_timezone);

// Outputs a date/time string based on the time zone you've set on the object.
$triggerOn = $datetime->format('Y-m-d H:i:s');

// Print the date/time string.
print $triggerOn; // 2013-04-01 08:08:00