略微加速

PHP官方手册 - 互联网笔记

PHP - Manual: IntlCalendar::roll

2024-11-13

IntlCalendar::roll

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

IntlCalendar::rollAdd value to field without carrying into more significant fields

说明

面向对象风格

public IntlCalendar::roll(int $field, int|bool $value): bool

过程化风格

intlcal_roll(IntlCalendar $calendar, int $field, int|bool $value): bool

Adds a (signed) amount to a field. The difference with respect to IntlCalendar::add() is that when the field value overflows, it does not carry into more significant fields.

参数

calendar

IntlCalendar 实例。

field

One of the IntlCalendar date/time field constants. These are integer values between 0 and IntlCalendar::FIELD_COUNT.

value

The (signed) amount to add to the field, true for rolling up (adding 1), or false for rolling down (subtracting 1).

返回值

Returns true on success or false on failure.

范例

示例 #1 IntlCalendar::roll()

<?php
ini_set
('date.timezone''Europe/Lisbon');
ini_set('intl.default_locale''pt_PT');

$cal = new IntlGregorianCalendar(2013/* June */30);

$cal->add(IntlCalendar::FIELD_DAY_OF_MONTH1);
var_dump(IntlDateFormatter::formatObject($cal)); // "01/07/2013, 00:00:00"

$cal->set(2013/* June */30);
$cal->roll(IntlCalendar::FIELD_DAY_OF_MONTHtrue); // roll up, same as rolling +1
var_dump(IntlDateFormatter::formatObject($cal)); // "01/06/2013, 00:00:00"

以上例程会输出:

string(20) "01/07/2013, 00:00:00"
string(20) "01/06/2013, 00:00:00"

参见

add a noteadd a note

User Contributed Notes

There are no user contributed notes for this page.

官方地址:https://www.php.net/manual/en/intlcalendar.roll.php

北京半月雨文化科技有限公司.版权所有 京ICP备12026184号-3