(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)
IntlCalendar::isSet — Whether a field is set
面向对象风格
$field
) : bool过程化风格
Returns whether a field is set (as opposed to clear). Set fields take priority over unset fields and their default values when the date/time is being calculated. Fields set later take priority over fields set earlier.
calendarAn IntlCalendar instance.
field
One of the IntlCalendar date/time field constants. These are integer
values between 0 and
IntlCalendar::FIELD_COUNT.
Assuming there are no argument errors, returns true if the field is set.
See the example on IntlCalendar::clear().