date_sunset

(PHP 5)

date_sunset Returns time of sunset for a given day and location

Description

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.

Parameters

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.

Errors/Exceptions

Every call to a date/time function will generate a E_NOTICE if the time zone is not valid, and/or a E_STRICT or E_WARNING message if using the system settings or the TZ environment variable. See also date_default_timezone_set()

Changelog

Version Description
5.1.0

Now issues the E_STRICT and E_NOTICE time zone errors.

Return Values

Returns the sunset time in a specified format on success or FALSE on failure.

Examples

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_STRING38.4, -9901);

?>

The above example will output something similar to:

Mon Dec 20 2004, sunset time : 18:13

See Also

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

Коментарии

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$longitude960);
       
$sunset date_sunset(time(), SUNFUNCS_RET_DOUBLE$latitude$longitude960);
       
$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";
}
?>
2006-09-30 08:17:50
http://php5.kiev.ua/manual/ru/function.date-sunset.html
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
2018-04-07 21:13:01
http://php5.kiev.ua/manual/ru/function.date-sunset.html
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)
2019-06-21 09:26:09
http://php5.kiev.ua/manual/ru/function.date-sunset.html

    Поддержать сайт на родительском проекте КГБ