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
Description
$time
, float $latitude
, float $longitude
) : arrayReturn Values
Returns array on success or FALSE on failure.
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.
Examples
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";
}
?>
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
<?php
var_dump(date_sun_info(strtotime("2017-12-21"), 90, 0));
?>
The above example will output:
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));
?>
The above example will output:
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)
}
See Also
- date_sunrise() - Returns time of sunrise for a given day and location
- date_sunset() - Returns time of sunset for a given day and location
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-function.date-sun-info.html
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References
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