date_sun_info()

(PHP 5 >= 5.1.2, PHP 7)

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:

sunriseThe time of the sunrise (zenith angle = 90°35').sunsetThe time of the sunset (zenith angle = 90°35').transitThe time when the sun is at its zenith, i.e. has reached its topmost point.civil_twilight_beginThe start of the civil dawn (zenith angle = 96°). It ends atsunrise.civil_twilight_endThe end of the civil dusk (zenith angle = 96°). It starts atsunset.nautical_twilight_beginThe start of the nautical dawn (zenith angle = 102°). It ends atcivil_twilight_begin.nautical_twilight_endThe end of the nautical dusk (zenith angle = 102°). It starts atcivil_twilight_end.astronomical_twilight_beginThe start of the astronomical dawn (zenith angle = 108°). It ends atnautical_twilight_begin.astronomical_twilight_endThe end of the astronomical dusk (zenith angle = 108°). It starts atnautical_twilight_end.

The values of the array elements are either UNIX timestamps,FALSEif the sun is below the respective zenith for the whole day,orTRUEif 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$latitudeand$longitudehas been swapped.

范例

Adate_sun_info()example

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

Polar night

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)
}

Midnight sun

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

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. 

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

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:

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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