Set behavior for handling repeating wall times at negative timezone offset transitions

# IntlCalendar::setRepeatedWallTimeOption

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

IntlCalendar::setRepeatedWallTimeOption — Set behavior for handling repeating wall times at negative timezone offset transitions

### Description

Object-oriented style

public IntlCalendar::setRepeatedWallTimeOption(int `$option`): true

Procedural style

intlcal_set_repeated_wall_time_option(IntlCalendar `$calendar`, int `$option`): true

Sets the current strategy for dealing with wall times that are repeated whenever the clock is set back during dailight saving time end transitions. The default value is `IntlCalendar::WALLTIME_LAST` (take the post-DST instant). The other possible value is `IntlCalendar::WALLTIME_FIRST` (take the instant that occurs during DST).

This function requires ICU 4.9 or later.

### Parameters

`calendar`

  An IntlCalendar instance.

`option`

  One of the constants `IntlCalendar::WALLTIME_FIRST` or `IntlCalendar::WALLTIME_LAST`.

### Return Values

Always returns `true`.

### Changelog

Version | Description
--- | ---
8.2.0 | The return type is `true` now; previously, it was bool.

### Examples

See the example on IntlCalendar::getRepeatedWallTimeOption().

### See Also

- intlCalendar::getRepeatedWallTimeOption() - Get behavior for handling repeating wall time
- intlCalendar::setSkippedWallTimeOption() - Set behavior for handling skipped wall times at positive timezone offset transitions
- intlCalendar::getSkippedWallTimeOption() - Get behavior for handling skipped wall time

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