date_sun_info
(PHP 5 >= 5.1.2, PHP 7, PHP 8)
date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
参数
timestamp-
Unix timestamp.
latitude-
Latitude in degrees.
longitude-
Longitude in degrees.
返回值
Returns an array whose structure 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.
更新日志
| 版本 | 说明 |
|---|---|
| 7.2.0 | The calculation was fixed with regards to local midnight instead of local noon, which changes the results slightly. |
示例
示例 #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";
}
?>以上示例会输出：
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
示例 #2 Polar night, with some processing
<?php
$tz = new \DateTimeZone('America/Anchorage');
$si = date_sun_info(strtotime("2022-12-21"), 70.21, -148.51);
foreach ($si as $key => $value) {
echo
match ($value) {
true => 'always',
false => 'never',
default => date_create("@{$value}")->setTimeZone($tz)->format( 'H:i:s T' ),
},
": {$key}",
"\n";
}
?>以上示例会输出：
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
示例 #3 Midnight sun (Tromsø, Norway)
<?php
$si = date_sun_info(strtotime("2022-06-26"), 69.68, 18.94);
print_r($si);
?>以上示例会输出：
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
)
示例 #4 Calculating length of day (Kyiv)
<?php
$si = date_sun_info(strtotime('2022-08-26'), 50.45, 30.52);
$diff = $si['sunset'] - $si['sunrise'];
echo "Length of day: ",
floor($diff / 3600), "h ",
floor(($diff % 3600) / 60), "s\n";
?>以上示例会输出：
Length of day: 13h 56s
用户贡献的备注 1 note
In the last example, conversion from seconds to Hour, Minutes, Seconds is wrong.
This is the correct verion:
<?php
$si = date_sun_info(strtotime('2022-08-26'), 50.45, 30.52);
$diff = $si['sunset'] - $si['sunrise']; # $diff is measured in seconds.
echo "Length of day: ",
floor($diff / 3600), "h",
floor(($diff % 3600) / 60), "m",
floor($diff % 60), "s\n";
?>
Output:
Length of day: 13h53m15s备份地址：http://www.lvesu.com/blog/php/function.date-sun-info.php