date_sunset

    (PHP 5, PHP 7, PHP 8)

    date_sunset — Returns time of sunset for a given day and location

    Увага

    This function has been DEPRECATED as of PHP 8.1.0. Relying on this function is highly discouraged. Use date_sun_info() instead.

    Опис

    date_sunset(
        int $timestamp,
        int $returnFormat = SUNFUNCS_RET_STRING,
        ?float $latitude = null,
        ?float $longitude = null,
        ?float $zenith = null,
        ?float $utcOffset = null
    ): string|int|float|false

    date_sunset() returns the sunset time for a given day (specified as a timestamp) and location.

    Параметри

    timestamp

    The timestamp of the day from which the sunset time is taken.

    returnFormat

    returnFormat constants
    constant description example
    SUNFUNCS_RET_STRING returns the result as string 16:46
    SUNFUNCS_RET_DOUBLE returns the result as float 16.78243132
    SUNFUNCS_RET_TIMESTAMP returns the result as int (timestamp) 1095034606

    latitude

    Defaults to North, pass in a negative value for South. See also: date.default_latitude

    longitude

    Defaults to East, pass in a negative value for West. See also: date.default_longitude

    zenith

    zenith is the angle between the center of the sun and a line perpendicular to earth's surface. It defaults to date.sunset_zenith

    Common zenith angles
    Angle Description
    90°50' Sunset: the point where the sun becomes invisible.
    96° Civil twilight: conventionally used to signify the end of dusk.
    102° Nautical twilight: the point at which the horizon ends being visible at sea.
    108° Astronomical twilight: the point at which the sun ends being the source of any illumination.

    utcOffset

    Specified in hours. The utcOffset is ignored, if returnFormat is SUNFUNCS_RET_TIMESTAMP.

    Значення, що повертаються

    Returns the sunset time in a specified returnFormat on success або false в разі помилки. One potential reason for failure is that the sun does not set at all, which happens inside the polar circles for part of the year.

    Помилки/виключення

    Якщо часовий пояс хибний, то під час кожного виклику функції дати/часу виникатиме E_WARNING. Див. date_default_timezone_set().

    Журнал змін

    Версія Опис
    8.1.0 This function has been deprecated in favor of date_sun_info().
    8.0.0 latitude, longitude, zenith and utcOffset are nullable now.

    Приклади

    Приклад #1 date_sunset() example

    <?php

    /* calculate the sunset time for Lisbon, Portugal
    Latitude: 38.4 North
    Longitude: 9 West
    Zenith ~= 90
    offset: +1 GMT
    */

    echo date("D M d Y"). ', sunset time : ' .date_sunset(time(), SUNFUNCS_RET_STRING, 38.4, -9, 90, 1);

    ?>

    Поданий вище приклад виведе щось схоже на:

    Mon Dec 20 2004, sunset time : 18:13

    Приклад #2 No sunset

    <?php
    $solstice     = strtotime('2017-12-21');
    var_dump(date_sunset($solstice, SUNFUNCS_RET_STRING, 69.245833, -53.537222));
    ?>

    Поданий вище приклад виведе:

    bool(false)

    Прогляньте також

    • date_sun_info() - Returns an array with information about sunset/sunrise and twilight begin/end

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