(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::getActualMaximum — The maximum value for a field, considering the objectʼs current time
オブジェクト指向型
$field
)手続き型
Returns a fieldʼs relative maximum value around the current time. The exact semantics vary by field, but in the general case this is the value that would be obtained if one would set the field value into the smallest relative maximum for the field and would increment it until reaching the global maximum or the field value wraps around, in which the value returned would be the global maximum or the value before the wrapping, respectively.
For instance, in the gregorian calendar, the actual maximum value for the day of month would vary between 28 and 31, depending on the month and year of the current time.
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。
An int representing the maximum value in the units associated
with the given field
失敗した場合に FALSE
を返します.
例1 IntlCalendar::getActualMaximum()
<?php
ini_set('date.timezone', 'Europe/Lisbon');
$cal = IntlCalendar::fromDateTime('2013-02-15');
var_dump($cal->getActualMaximum(IntlCalendar::FIELD_DAY_OF_MONTH)); //28
$cal->add(IntlCalendar::FIELD_EXTENDED_YEAR, -1);
var_dump($cal->getActualMaximum(IntlCalendar::FIELD_DAY_OF_MONTH)); //29
上の例の出力は以下となります。
int(28) int(29)