IntlCalendar::inDaylightTime
(PHP 5 >= 5.5.0, PHP 7, PHP 8, PECL >= 3.0.0a1)
IntlCalendar::inDaylightTime — Whether the objectʼs time is in Daylight Savings Time
Description
Object-oriented style
public IntlCalendar::inDaylightTime(): bool
Procedural style
Whether, for the instant represented by this object and for this objectʼs timezone, daylight saving time is in place.
Parameters
-
calendar -
An IntlCalendar instance.
Return Values
Returns true if the date is in Daylight Savings Time, false otherwise.
On failure false is also returned. To detect error conditions use intl_get_error_code(), or set up Intl to throw exceptions.
Examples
Example #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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