date_sunset

(PHP 5, PHP 7)

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

설명

mixed date_sunset ( int $timestamp [, int $format = SUNFUNCS_RET_STRING [, float $latitude = ini_get("date.default_latitude") [, float $longitude = ini_get("date.default_longitude") [, float $zenith = ini_get("date.sunset_zenith") [, float $gmt_offset = 0 ]]]]] )

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

인수

timestamp

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

format

**`format` 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 integer (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

Default: date.sunset_zenith

gmtoffset

Specified in hours.

오류/예외

모든 날짜/시간 함수 호출은 시간대가 유효하지 않을 때 E_NOTICE를, 시스템 설정이나 TZ 환경 변수를 사용할 때 E_STRICT나 E_WARNING 메세지를 생성합니다. date_default_timezone_set()을 참고하십시오.

변경점

버전	설명
5.1.0	시간대 오류시 `E_STRICT`와 `E_NOTICE`가 발생합니다.

반환값

Returns the sunset time in a specified format on success실패 시 FALSE를 반환합니다.

예제

Example #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);

?>

위 예제의 출력 예시:

Mon Dec 20 2004, sunset time : 18:13

참고

date_sunrise() - Returns time of sunrise for a given day and location

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User Contributed Notes 3 notes

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matt at mctsoft dot net ¶

5 years ago


yes SUNFUNCS_RET_TIMESTAMP does return GMT(0) time

so something like...

$arr = localtime(date_sunset(time(),SUNFUNCS_RET_TIMESTAMP,51.5,0)); // London

$hh = $arr[2];
$mm = $arr[1];

Will give figure out your localtime and daylight saving (BST)

down

-1

nospam at nomail dot com ¶

6 years ago


maybe I am wrong, but I think

SUNFUNCS_RET_TIMESTAMP     return GMT(0) time

SUNFUNCS_RET_STRING     Return local time
SUNFUNCS_RET_DOUBLE     Return local time

down

-25

michael at dayah dot com ¶

18 years ago


I use an IP to location database to determine the visitor's approximate latitude and longitude and then serve them a day or night color scheme based on whether it is before civil dawn or dusk. I've had problems when not specifying the timezone, specifically a 1 hour error, so I use GMT.



<?php

date_default_timezone_set("GMT");



function scheme() {

        $sunrise = date_sunrise(time(), SUNFUNCS_RET_DOUBLE, $latitude, $longitude, 96, 0);

        $sunset = date_sunset(time(), SUNFUNCS_RET_DOUBLE, $latitude, $longitude, 96, 0);

        $now = date("H") + date("i") / 60 + date("s") / 3600;



        if ($sunrise < $sunset)

                if (($now > $sunrise) && ($now < $sunset)) return "day";

                else return "night";

        else

                if (($now > $sunrise) || ($now < $sunset)) return "day";

                else return "night";

}

?>

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