IntlCalendar::roll
(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::roll — Add value to field without carrying into more significant fields
説明
オブジェクト指向型
手続き型
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.
パラメータ
-
cal -
The IntlCalendar resource.
-
field -
IntlCalendar の日付/時刻 フィールド定数 のいずれか。 0 から
IntlCalendar::FIELD_COUNTまでの間の整数値です。 -
amountOrUpOrDown -
The (signed) amount to add to the field,
TRUEfor rolling up (adding 1), orFALSEfor rolling down (subtracting 1).
返り値
Returns TRUE on success or FALSE on failure.
例
例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"
上の例の出力は以下となります。
string(20) "01/07/2013, 00:00:00" string(20) "01/06/2013, 00:00:00"
参考
- 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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