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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

#[\Deprecated]
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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