百科狗IntlCalendar::add() - IntlCalendar类
IntlCalendar::add()
(PHP 5 >= 5.5.0, PHP 7, PECL >= 3.0.0a1)
Add a(signed)amount of time to a field
说明
面向对象风格publicIntlCalendar::add(int $field,int $amount): bool过程化风格
intlcal_add(IntlCalendar$cal,int $field,int $amount): 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 Janurary.
参数
$calThe IntlCalendar resource.
$field One of the IntlCalendar date/time field constants. These are integer values between0and IntlCalendar::FIELD_COUNT.
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 wil be moved into the past. The unit is implicit to the field type. For instance, hours for IntlCalendar::FIELD_HOUR_OF_DAY.
返回值
Returns TRUE on success 或者在失败时返回FALSE.
范例
IntlCalendar::add()
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