date_sun_info

(PHP 5 >= 5.1.2, PHP 7)

date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end

说明

date_sun_info ( int $time , float $latitude , float $longitude ) : array

参数

time: Timestamp.
latitude: Latitude in degrees.
longitude: Longitude in degrees.

返回值

Returns array on success 或者在失败时返回 FALSE. The structure of the array is detailed in the following list:

sunrise: The time of the sunrise (zenith angle = 90°35').
sunset: The time of the sunset (zenith angle = 90°35').
transit: The time when the sun is at its zenith, i.e. has reached its topmost point.
civil_twilight_begin: The start of the civil dawn (zenith angle = 96°). It ends at sunrise.
civil_twilight_end: The end of the civil dusk (zenith angle = 96°). It starts at sunset.
nautical_twilight_begin: The start of the nautical dawn (zenith angle = 102°). It ends at civil_twilight_begin.
nautical_twilight_end: The end of the nautical dusk (zenith angle = 102°). It starts at civil_twilight_end.
astronomical_twilight_begin: The start of the astronomical dawn (zenith angle = 108°). It ends at nautical_twilight_begin.
astronomical_twilight_end: The end of the astronomical dusk (zenith angle = 108°). It starts at nautical_twilight_end.

The values of the array elements are either UNIX timestamps, FALSE if the sun is below the respective zenith for the whole day, or TRUE if the sun is above the respective zenith for the whole day.

更新日志

版本	说明
5.2.2	The order of `latitude` and `longitude` has been swapped.

范例

Example #1 A date_sun_info() example


<?php
$sun_info = date_sun_info(strtotime("2006-12-12"), 31.7667, 35.2333);
foreach ($sun_info as $key => $val) {
    echo "$key: " . date("H:i:s", $val) . "\n";
}
?>

以上例程会输出：

sunrise: 05:52:11
sunset: 15:41:21
transit: 10:46:46
civil_twilight_begin: 05:24:08
civil_twilight_end: 16:09:24
nautical_twilight_begin: 04:52:25
nautical_twilight_end: 16:41:06
astronomical_twilight_begin: 04:21:32
astronomical_twilight_end: 17:12:00

Example #2 Polar night


<?php
var_dump(date_sun_info(strtotime("2017-12-21"), 90, 0));
?>

以上例程会输出：

array(9) {
  ["sunrise"]=>
  bool(false)
  ["sunset"]=>
  bool(false)
  ["transit"]=>
  int(1513857490)
  ["civil_twilight_begin"]=>
  bool(false)
  ["civil_twilight_end"]=>
  bool(false)
  ["nautical_twilight_begin"]=>
  bool(false)
  ["nautical_twilight_end"]=>
  bool(false)
  ["astronomical_twilight_begin"]=>
  bool(false)
  ["astronomical_twilight_end"]=>
  bool(false)
}

Example #3 Midnight sun


<?php
var_dump(date_sun_info(strtotime("2017-06-21"), 90, 0));
?>

以上例程会输出：

array(9) {
  ["sunrise"]=>
  bool(true)
  ["sunset"]=>
  bool(true)
  ["transit"]=>
  int(1498046510)
  ["civil_twilight_begin"]=>
  bool(true)
  ["civil_twilight_end"]=>
  bool(true)
  ["nautical_twilight_begin"]=>
  bool(true)
  ["nautical_twilight_end"]=>
  bool(true)
  ["astronomical_twilight_begin"]=>
  bool(true)
  ["astronomical_twilight_end"]=>
  bool(true)
}

参见

date_sunrise() - 返回给定的日期与地点的日出时间
date_sunset() - 返回给定的日期与地点的日落时间

User Contributed Notes

nospam at nomail dot com 07-Apr-2018 06:10


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

ELY M. 08-Oct-2010 09:42


I have been working on my own php script to get current down or up for sun and moon.   I had to add function for any places that have 24 hour sun.  





here is my code for places with 24 hour sun. 





<?php


   if ($sunrise == 0 && $sunset == 0) {


   $sunrise24 = "";


   $sunset24 = "";


   //run suninfo


   $sunup = date_sun_info(strtotime($year."-".$month."-".$day), $lat, $lon);


   }





//check if sun is up all day.


if ($sunup[sunrise] == 1 && $sunup[sunrise] == 1) {


imagecopy($sky, $sun, 60, 20, 0, 0, $sun_width, $sun_height);


imagefill($sky, 0, 0, $bluesky);


}


?>

mother at localsnow dot com 23-Jun-2010 02:55


We needed the length of the day, both sunrise to sunset and twilight to twilight for particular latitudes. Sun_info() is just the thing. We mistakenly thought 'transit' was this value, which it is not. Transit is the time of day the sun is at its zenith. To get length of day, one must perform math on the results of sun_info().



When doing math with time values, don't expect date() to do the conversion to hours:minutes:seconds. date() thinks the passed value is a time since the epoch. You will need to do your own conversion to hours:minutes:seconds, using something like the following:

<?php

function hms($val) {

// convert seconds to hours:minutes:seconds

$v=$val;

$h=intval($v/3600);

$v-=($h*3600); // subtract hours

$m=intval($v/60); 

$v-=($m*60); // subtract minutes

$s=$v % 60; // seconds remaining

if ($h<10) {$h="0".$h;}

if ($m<10) {$m="0".$m;}

if ($s<10) {$s="0".$s;}

return $h.":".$m.":".$s;

}

?>



Regarding date_sunrise() and date_sunset(), these both return values without seconds and without correction for Daylight time. Whereas sun_info() handles seconds as well as Daylight time. It even handles dates prior to the epoch correctly as negative timestamps, at least as of php 5.2.12 



For example, 

sun_info(strtotime('July 4, 1776'),47.3506,-122.6417) 

produces something like the following when using date_default_timezone_set('America/Los_Angeles') and 

date("H:i:s", $val)



sunrise: 04:20:26 [-6106016374] 

sunset: 20:09:03 [-6105959457] 

transit: 12:14:45 [-6105987915] 

civil_twilight_begin: 03:40:54 [-6106018746] 

civil_twilight_end: 20:48:35 [-6105957085] 

nautical_twilight_begin: 02:46:58 [-6106021982] 

nautical_twilight_end: 21:42:31 [-6105953849] 

astronomical_twilight_begin: 01:28:06 [-6106026714] 

astronomical_twilight_end: 23:01:23 [-6105949117] 



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