IntlCalendar::inDaylightTime
(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::inDaylightTime — Whether the object?s time is in Daylight Savings Time
説明
オブジェクト指向型
public bool IntlCalendar::inDaylightTime
( void
)
手続き型
Whether, for the instant represented by this object and for this object?s timezone, daylight saving time is in place.
パラメータ
-
cal -
The IntlCalendar resource.
返り値
Returns TRUE if the date is in Daylight Savings Time, FALSE otherwise.
The value FALSE may also be returned on failure, for instance after
specifying invalid field values on non-lenient mode; use exceptions or query
intl_get_error_code() to disambiguate.
例
例1 IntlCalendar::inDaylightTime()
<?php
ini_set('date.timezone', 'Europe/Lisbon');
ini_set('intl.default_locale', 'pt_PT');
$cal = new IntlGregorianCalendar(2013, 6 /* July */, 1, 4, 56, 31);
var_dump($cal->inDaylightTime()); // true
$cal->set(IntlCalendar::FIELD_MONTH, 11 /* December */);
var_dump($cal->inDaylightTime()); // false
//DST end transition on 2013-10-27 at 0200 (wall time back 1 hour)
$cal = new IntlGregorianCalendar(2013, 9 /* October */, 27, 1, 30, 0);
var_dump($cal->inDaylightTime()); // false (default WALLTIME_LAST)
$cal->setRepeatedWallTimeOption(IntlCalendar::WALLTIME_FIRST);
$cal->set(IntlCalendar::FIELD_HOUR_OF_DAY, 1); // force time recalculation
var_dump($cal->inDaylightTime()); // true
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