IntlCalendar::add

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

IntlCalendar::addAdd a (signed) amount of time to a field

Descrizione

Stile orientato agli oggetti

public IntlCalendar::add(int $field, int $value): bool

Stile procedurale

intlcal_add(IntlCalendar $calendar, int $field, int $value): bool

Add a signed amount to a field. Adding a positive amount allows advances in time, even if the numeric value of the field decreases (e.g. when working with years in BC dates).

Other fields may need to adjusted – for instance, adding a month to the 31st of January will result in the 28th (or 29th) of February. Contrary to IntlCalendar::roll(), when a value wraps around, more significant fields may change. For instance, adding a day to the 31st of January will result in the 1st of February, not the 1st of January.

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 current field. If the amount is positive, the instant will be moved forward; if it is negative, the instant will be moved into the past. The unit is implicit to the field type. For instance, hours for IntlCalendar::FIELD_HOUR_OF_DAY.

Valori restituiti

Returns true on success o false in caso di fallimento.

Esempi

Example #1 IntlCalendar::add()

<?php
ini_set
('intl.default_locale', 'fr_FR');
ini_set('date.timezone', 'UTC');

$cal = new IntlGregorianCalendar(2012, 0 /* January */, 31);
echo
IntlDateFormatter::formatObject($cal), "\n";

$cal->add(IntlCalendar::FIELD_MONTH, 1);
echo
IntlDateFormatter::formatObject($cal), "\n";

$cal->add(IntlCalendar::FIELD_DAY_OF_MONTH, 1);
echo
IntlDateFormatter::formatObject($cal), "\n";

Il precedente esempio visualizzerà:

31 janv. 2012 00:00:00
29 févr. 2012 00:00:00
1 mars 2012 00:00:00

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