PHP 7.0.6 Released

    IntlCalendar::inDaylightTime

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

    IntlCalendar::inDaylightTime — Whether the objectʼs time is in Daylight Savings Time

    Description

    Object oriented style

    public bool IntlCalendar::inDaylightTime ( void )

    Procedural style

    bool intlcal_in_daylight_time ( IntlCalendar $cal )

    Whether, for the instant represented by this object and for this objectʼs timezone, daylight saving time is in place.

    Parameters

    cal

    The IntlCalendar resource.

    Return Values

    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

    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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