(PHP 5.5.0, PHP 7, PECL >= 3.0.0a1)
Whether the objectʼs time is in Daylight Savings Time
public bool IntlCalendar::inDaylightTime ( void )
Object oriented style
Procedural style
Whether, for the instant represented by this object and for this objectʼs timezone, daylight saving time is in place.
Parameters:
cal
The IntlCalendar resource.
Returns:
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.
Examples:
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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