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

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

cal

The IntlCalendar resource.

field

Одна из представленных в классе IntlCalendar констант полей типа дата/время. Целое число от 0 до IntlCalendar::FIELD_COUNT.

amount

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.