DateTimeImmutable::modify

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

DateTimeImmutable::modifyCreates a new object with modified timestamp

说明

public DateTimeImmutable::modify ( string $modifier ) : DateTimeImmutable|false

Creates a new DateTimeImmutable object with modified timestamp. The original object is not modified.

参数

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。

modifier

日期/时间字符串。正确格式的说明详见 日期与时间格式

返回值

Returns the newly created object 或者在失败时返回 false.

User Contributed Notes

dmytro dot sokil at gmail dot com 19-Feb-2018 05:36
To modify milliseconds and microseconds use next formats:

<?php
$a
= new \DateTimeImmutable('2018-01-01 00:00:00.000');
$b = $a->modify('9 msec');
var_dump($b->format('Y-m-d H:i:s.u'));
?>

Returns string(26) "2018-01-01 00:00:00.009000"

<?php
$a
= new \DateTimeImmutable('2018-01-01 00:00:00.000');
$b = $a->modify('9 usec');
var_dump($b->format('Y-m-d H:i:s.u'));
?>

Returns "2018-01-01 00:00:00.000009"