Add value to field without carrying into more significant fields


(PHP 5.5.0, PECL >= 3.0.0a1)

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

Описание

Объектно-ориентированный стиль

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

Процедурный стиль

bool intlcal_roll ( IntlCalendar $cal , 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

cal

The IntlCalendar resource.

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" 

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