在 PHP 中获取 UTC 时间
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get UTC time in PHP
提问by Robin Michael Poothurai
How can I get UTC/GMT +/- time stamp using PHP's date() function? For example, if I try
如何使用 PHP 的 date() 函数获取 UTC/GMT +/- 时间戳？例如，如果我尝试
date("Y-m-d H:i:s", time());
I will get Unix time stamp; but I need to get UTC/GMT time stamp with string GMT/UTC+/-0400 or GMT/UTC+/-1000 based on local timings.
我会得到Unix时间戳；但我需要根据本地时间获取带有字符串 GMT/UTC+/-0400 或 GMT/UTC+/-1000 的 UTC/GMT 时间戳。
回答by nikc.org
回答by Shankar Damodaran
回答by Jessedc
As previously answered here, since PHP 5.2.0 you can use the DateTimeclass and specify the UTC timezone with an instance of DateTimeZone.
正如之前在此处回答的那样，自 PHP 5.2.0 起，您可以使用DateTime该类并通过DateTimeZone.
The DateTime __construct() documentationsuggests passing "now" as the first parameter when creating a DateTime instance and specifying a timezone to get the current time.
DateTime __construct() 文档建议在创建 DateTime 实例并指定时区以获取当前时间时将“now”作为第一个参数传递。
$date_utc = new \DateTime("now", new \DateTimeZone("UTC"));
echo $date_utc->format(\DateTime::RFC850); # Saturday, 18-Apr-15 03:23:46 UTC
回答by Sudhir Bastakoti
$time = time();
$check = $time+date("Z",$time);
echo strftime("%B %d, %Y @ %H:%M:%S UTC", $check);
回答by Allanrbo
date("Y-m-d H:i:s", time() - date("Z"))
回答by StefansArya
Obtaining UTC date
获取UTC日期
gmdate("Y-m-d H:i:s");
Obtaining UTC timestamp
获取UTC时间戳
time();
The result will not be different even you have date_default_timezone_seton your code.
即使您拥有date_default_timezone_set代码，结果也不会有所不同。
回答by anubhava
Other than calling gmdateyou can also put this code before your rest of the code:
除了调用之外，gmdate您还可以将此代码放在其余代码之前：
<?php
date_default_timezone_set("UTC");
?>
That will make rest of your date/time related calls to use GMT/UTC timezone.
这将使您的其余日期/时间相关调用使用 GMT/UTC 时区。
回答by RicoRico
You can use gmmktimefunction without arguments to obtain the current UTC timestamp:
您可以使用不带参数的gmmktime函数来获取当前的 UTC 时间戳：
$time = gmmktime();
echo date("Y-m-d H:i:s", $time);
gmmktime will only work if your server time is using UTC. For example, my server is set to US/Pacific. the listed function above echos back Pacific time.
gmmktime 仅在您的服务器时间使用 UTC 时才有效。例如，我的服务器设置为美国/太平洋。上面列出的函数与太平洋时间相呼应。
回答by Jeff Puckett
with string GMT/UTC +/-0400or GMT/UTC +/-1000based on local timings
带有字符串 GMT/UTC +/-0400或 GMT/UTC +/-1000基于本地时间
Your custom formatis just missing Oto give you the timezone offsets from local time.
您的自定义格式只是缺少O为您提供与本地时间的时区偏移量。
Difference to Greenwich time (GMT) in hours Example: +0200
与格林威治时间 (GMT) 的时差示例：+0200
date_default_timezone_set('America/La_Paz');
echo date('Y-m-d H:i:s O');
2018-01-12 12:10:11 -0400
2018-01-12 12:10:11 -0400
However, for maximized portability/interoperability, I would recommend using the ISO8601date format c
但是，为了最大限度地提高可移植性/互操作性，我建议使用ISO8601日期格式c
date_default_timezone_set('America/La_Paz');
echo date('c');
2018-01-12T12:10:11-04:00
2018-01-12T12:10:11-04:00
date_default_timezone_set('Australia/Brisbane');
echo date('c');
2018-01-13T02:10:11+10:00
2018-01-13T02:10:11+10:00
You can use also gmdateand the timezone offset string will always be +00:00
您也可以使用gmdate，时区偏移字符串将始终为+00:00
date_default_timezone_set('America/La_Paz');
echo gmdate('c');
2018-01-12T16:10:11+00:00
2018-01-12T16:10:11+00:00
date_default_timezone_set('Australia/Brisbane');
echo gmdate('c');
2018-01-12T16:10:11+00:00
2018-01-12T16:10:11+00:00
回答by Dalip
You can use following to get UTC time:
您可以使用以下方法获取 UTC 时间：
date_default_timezone_set('Asia/Calcutta');
$current_date = date("Y/m/d g:i A");
$ist_date = DateTime::createFromFormat(
'"Y/m/d g:i A"',
$current_date,
new DateTimeZone('Asia/Calcutta')
);
$utc_date = clone $ist_date;
$utc_date->setTimeZone(new DateTimeZone('UTC'));
echo 'UTC: ' . $utc_date->format('Y-m-d g:i A');
