date_sunrise

(PHP 5, PHP 7)

date_sunrise — Returns time of sunrise for a given day and location

설명

mixed date_sunrise ( 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.sunrise_zenith") [, float $gmt_offset = 0 ]]]]] )

date_sunrise() returns the sunrise time for a given day (specified as a timestamp) and location.

인수

timestamp

The timestamp of the day from which the sunrise 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.sunrise_zenith

gmtoffset

Specified in hours.

반환값

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

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.

예제

Example #1 date_sunrise() example


<?php

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

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

?>

위 예제의 출력 예시:

Mon Dec 20 2004, sunrise time : 08:54

참고

date_sunset() - Returns time of sunset for a given day and location

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User Contributed Notes 3 notes

down

nomail at nospam 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

scottix at gmail dot com ¶

10 years ago


If you are working in multiple timezones getting the offset from a date is a little tricky because you need it in hours.

<?php

$time = new DateTime('now', new DateTimeZone('America/Los_Angeles'));

date_sunrise(
 $time->getTimestamp(),
 SUNFUNCS_RET_TIMESTAMP,
 38.4,
 -9,
 90,
 $time->getOffset() / 3600
);

down

-5

jonathanNO dot kuhnSPAM at gmailNOSPAM dot com ¶

14 years ago


After some searching, I finally found a website that can calculate the sun's zenith. Just look up your city's lat/long (remember, west/south are negative even if it doesn't show where you look up the lat/long) and the time of sunrise/sunset and use this site:

http://solardat.uoregon.edu/cgi-bin/SolarPositionCalculator.cgi

You have to enter in the sunrise/sunset times separately, but it works.
San Diego is:
 Lat: 32.73
 Long: -117.17
 Sunrise Z.: 90.7379
 Sunset Z.: 90.8880

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