IntlCalendar
PHP Manual

IntlCalendar::roll

(PHP 5.5.0, PECL >= 3.0.0a1)

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

Описание

public bool IntlCalendar::roll ( int $field , mixed $amountOrUpOrDown )

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.

Список параметров

field

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

amountOrUpOrDown

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

Возвращаемые значения

Returns TRUE on success or FALSE on failure.

Примеры

Пример #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"

Результат выполнения данного примера:

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

Смотрите также


IntlCalendar
PHP Manual