[PHP 5 >= 5.1.2, PHP 7, PHP 8]
date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
Description
date_sun_info[int $timestamp
, float $latitude
, float $longitude
]: array
Parameters
timestamp
Unix timestamp.
latitude
Latitude in degrees.
longitude
Longitude in degrees.
Return Values
Returns array on success or false
on failure. The structure of the array is detailed in the following list:
sunrise
The timestamp of the sunrise [zenith angle = 90°35']. sunset
The timestamp of the sunset [zenith angle = 90°35']. transit
The timestamp 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.
Changelog
7.2.0 | The calculation was fixed with regards to local midnight instead of local noon, which changes the results slightly. |
Examples
Example #1 A date_sun_info[] example
The above example will output:
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, with some processing
The above example will output:
never: sunrise never: sunset 12:52:18 AKST: transit 10:53:19 AKST: civil_twilight_begin 14:51:17 AKST: civil_twilight_end 09:01:47 AKST: nautical_twilight_begin 16:42:48 AKST: nautical_twilight_end 07:40:47 AKST: astronomical_twilight_begin 18:03:49 AKST: astronomical_twilight_end
Example #3 Midnight sun [Tromsø, Norway]
The above example will output:
Array [ [sunrise] => 1 [sunset] => 1 [transit] => 1656240426 [civil_twilight_begin] => 1 [civil_twilight_end] => 1 [nautical_twilight_begin] => 1 [nautical_twilight_end] => 1 [astronomical_twilight_begin] => 1 [astronomical_twilight_end] => 1 ]
Example #4 Calculating length of day [Kyiv]
The above example will output:
There are no user contributed notes for this page.