update : 2015.11.03
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Add value to field without carrying into more significant fields
IntlCalendar
PHP Manual

IntlCalendar::roll

(PHP 5.5.0, PECL >= 3.0.0a1)

IntlCalendar::roll — Add value to field without carrying into more significant fields

설명

객체 기반 형식

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

절차식 형식

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.

인수

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).

반환값

Returns TRUE on success or FALSE on failure.

예제

Example #1 IntlCalendar::roll()

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

$cal = new IntlGregorianCalendar(2013, 5 /* June */, 30);

$cal->add(IntlCalendar::FIELD_DAY_OF_MONTH, 1);
var_dump(IntlDateFormatter::formatObject($cal)); // "01/07/2013, 00:00:00"

$cal->set(2013, 5 /* June */, 30);
$cal->roll(IntlCalendar::FIELD_DAY_OF_MONTH, true); // roll up, same as rolling +1
var_dump(IntlDateFormatter::formatObject($cal)); // "01/06/2013, 00:00:00"

위 예제의 출력:

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

참고

IntlCalendar
PHP Manual