Whether a field is set

# IntlCalendar::isSet

(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)

IntlCalendar::isSet — Whether a field is set

### 说明

面向对象风格

public function IntlCalendar::isSet(int `$field`): bool

过程化风格

function intlcal_is_set(IntlCalendar `$calendar`, int `$field`): bool

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.

### 参数

`calendar`
  IntlCalendar 实例。
`field`

  One of the IntlCalendar date/time field constants. These are integer values between `0` and `IntlCalendar::FIELD_COUNT`.

### 返回值

Assuming there are no argument errors, returns `true` if the field is set.

### 示例

See the example on IntlCalendar::clear().

### 参见

- IntlCalendar::clear() - Clear a field or all fields
- IntlCalendar::set() - Set a time field or several common fields at once

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