A 4th parameter has been added in PHP-7.1 : microseconds
See the notes here:
https://github.com/php/php-src/blob/e33ec61f9c1baa73bfe1b03b8c48a824ab2a867e/UPGRADING#L285
PHP - Manual: DateTime::setTime
2024-12-22
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
DateTime::setTime -- date_time_set — 设置 DateTime 对象的时间
面向对象风格
过程化风格
$object
,$hour
,$minute
,$second
= 0,$microsecond
= 0设置 DateTime 对象的时间。
object
仅过程化风格:由 date_create() 返回的 DateTime 类型的对象。此函数会修改这个对象。
hour
小时。
minute
分钟。
second
秒。
microsecond
微秒。
返回被修改的 DateTime 对象, 或者在失败时返回 false
.
版本 | 说明 |
---|---|
7.1.0 | 新增 microsecond 参数。 |
示例 #1 DateTime::setTime() 例程
面向对象风格
<?php
$date = new DateTime('2001-01-01');
$date->setTime(14, 55);
echo $date->format('Y-m-d H:i:s') . "\n";
$date->setTime(14, 55, 24);
echo $date->format('Y-m-d H:i:s') . "\n";
?>
过程化风格
<?php
$date = date_create('2001-01-01');
date_time_set($date, 14, 55);
echo date_format($date, 'Y-m-d H:i:s') . "\n";
date_time_set($date, 14, 55, 24);
echo date_format($date, 'Y-m-d H:i:s') . "\n";
?>
以上例程的输出类似于:
2001-01-01 14:55:00 2001-01-01 14:55:24
示例 #2 超出有效范围的部分会增加到上一级
<?php
$date = new DateTime('2001-01-01');
$date->setTime(14, 55, 24);
echo $date->format('Y-m-d H:i:s') . "\n";
$date->setTime(14, 55, 65);
echo $date->format('Y-m-d H:i:s') . "\n";
$date->setTime(14, 65, 24);
echo $date->format('Y-m-d H:i:s') . "\n";
$date->setTime(25, 55, 24);
echo $date->format('Y-m-d H:i:s') . "\n";
?>
以上例程会输出:
2001-01-01 14:55:24 2001-01-01 14:56:05 2001-01-01 15:05:24 2001-01-02 01:55:24
A 4th parameter has been added in PHP-7.1 : microseconds
See the notes here:
https://github.com/php/php-src/blob/e33ec61f9c1baa73bfe1b03b8c48a824ab2a867e/UPGRADING#L285
Be aware that setTime can cause a change in the timezone offset: https://3v4l.org/MqYN9
(The time 01:05:00 exists twice on this day in Europe/London due to DST change - once in +01:00 and then again at +00:00)
$tzUK = new \DateTimeZone("Europe/London");
$tzUtc = new \DateTimeZone("UTC");
$dt = \DateTimeImmutable::createFromFormat("!Y-m-d H:i:s", "2020-10-25 00:05:00", $tzUtc);
$dt = DateTime::createFromFormat('U', $dt->format('U'));
print $dt->format(\DateTime::RFC3339 ." e") ."\n";
$dt->setTimeZone($tzUK);
print $dt->format(\DateTime::RFC3339 ." e") ."\n";
$dt->setTime((int) $dt->format('H'), (int) $dt->format('i'), 0);
print $dt->format(\DateTime::RFC3339 ." e") ."\n";
Will output:
2020-10-25T00:05:00+00:00 +00:00
2020-10-25T01:05:00+01:00 Europe/London
2020-10-25T01:05:00+00:00 Europe/London
Verified on PHP 5.3 thru 8.0 (latest at time of posting)