Get set of locale keyword values

# IntlCalendar::getKeywordValuesForLocale

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

IntlCalendar::getKeywordValuesForLocale — Get set of locale keyword values

### 说明

面向对象风格

public static function IntlCalendar::getKeywordValuesForLocale(string `$keyword`, string `$locale`, bool `$onlyCommon`): IntlIterator|false

过程化风格

function intlcal_get_keyword_values_for_locale(string `$keyword`, string `$locale`, bool `$onlyCommon`): IntlIterator|false

For a given locale key, get the set of values for that key that would result in a different behavior. For now, only the `'calendar'` keyword is supported.

This function requires ICU 4.2 or later.

### 参数

`keyword`

  The locale keyword for which relevant values are to be queried. Only `'calendar'` is supported.

`locale`

  The locale onto which the keyword/value pair are to be appended.

`onlyCommon`

  Whether to show only the values commonly used for the specified locale.

### 返回值

An iterator that yields strings with the locale keyword values 或者在失败时返回 `false`.

### 示例

示例 #1 IntlCalendar::getKeywordValuesForLocale()

    <?php
    print_r(
            iterator_to_array(
                    IntlCalendar::getKeywordValuesForLocale(
                            'calendar', 'fa_IR', true)));
    print_r(
            iterator_to_array(
                    IntlCalendar::getKeywordValuesForLocale(
                            'calendar', 'fa_IR', false)));

以上示例会输出：

    Array
    (
        [0] => persian
        [1] => gregorian
        [2] => islamic
        [3] => islamic-civil
    )
    Array
    (
        [0] => persian
        [1] => gregorian
        [2] => islamic
        [3] => islamic-civil
        [4] => japanese
        [5] => buddhist
        [6] => roc
        [7] => hebrew
        [8] => chinese
        [9] => indian
        [10] => coptic
        [11] => ethiopic
        [12] => ethiopic-amete-alem
    )

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