(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)
IntlCalendar::setSkippedWallTimeOption — Set behavior for handling skipped wall times at positive timezone offset transitions
Style orienté objet
$option): boolStyle procédural
   Sets the current strategy for dealing with wall times that are skipped
   whenever the clock is forwarded during dailight saving time start transitions.
   The default value is IntlCalendar::WALLTIME_LAST (take
   it as being the same instant as the one when the wall time is one hour
   more).  Alternative values are
   IntlCalendar::WALLTIME_FIRST (same instant as the one
   with a wall time of one hour less) and
   IntlCalendar::WALLTIME_NEXT_VALID (same instant as
   when DST begins).
  
This affects only the instant represented by the calendar (as reported by IntlCalendar::getTime()), the field values will not be rewritten accordingly.
The calendar must be lenient for this option to have any effect, otherwise attempting to set a non-existing time will cause an error.
This function requires ICU 4.9 or later.
calendarUne instance IntlCalendar.
option
      One of the constants IntlCalendar::WALLTIME_FIRST,
      IntlCalendar::WALLTIME_LAST or
      IntlCalendar::WALLTIME_NEXT_VALID.     
     
   Retourne toujours true.
  
See the example on IntlCalendar::getSkippedWallTimeOption().