IntlCalendar::roll

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

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

Descrizione

Stile orientato agli oggetti

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

Stile procedurale

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.

Elenco dei parametri

calendar: An IntlCalendar instance.
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).

Valori restituiti

Returns true on success or false on failure.

Esempi

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"

Il precedente esempio visualizzerà:

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

Vedere anche:

IntlCalendar::add() - Add a (signed) amount of time to a field
IntlCalendar::set() - Set a time field or several common fields at once

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