如何使用 DateTime 类在 PHP 中的时区之间进行转换？
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How to convert between time zones in PHP using the DateTime class?
提问by Jaylen
I am trying to convert time between current time to UTC and UTC to current time zone.
我正在尝试将当前时间转换为 UTC 和 UTC 到当前时区之间的时间。
Here is what I have done:
这是我所做的：
$schedule_date = new DateTime($triggerOn, new DateTimeZone('UTC') );
$triggerOn = $schedule_date->format('Y-m-d H:i:s');
echo $triggerOn;
The output value does not change the only thing that changes in format.
输出值不会改变唯一改变格式的东西。
the string $triggerOnwas generated based on America/Los_Angelestimezone
该字符串$triggerOn是基于America/Los_Angeles时区生成的
This is how my string looks like before and after:
这是我的字符串前后的样子：
BEFORE 04/01/2013 03:08 PM
AFTER 2013-04-01 15:08:00
So the issue here is that DateTime does not convert to UTC.
所以这里的问题是 DateTime 不会转换为 UTC。
回答by Mike
What you're looking for is this:
你要找的是这个：
$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
回答by Joshua Burns
You are consuming the date/time and setting the time zone correctly, however before formatting the datetime, you are not setting the desired output timezone. Here is an example which accepts a UTC time zone, and converts the date/time to the America/Los_Angeles time zone:
您正在使用日期/时间并正确设置时区，但是在格式化日期时间之前，您没有设置所需的输出时区。这是一个接受 UTC 时区并将日期/时间转换为 America/Los_Angeles 时区的示例：
<?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
回答by Jerry
Create the date using the local timezone, then call DateTime::setTimeZone()to change it.
使用本地时区创建日期，然后调用DateTime::setTimeZone()更改它。
