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
說明
date_sun_info(int
$timestamp, float $latitude, float $longitude): array參數
-
timestamp -
Unix timestamp.
-
latitude -
Latitude in degrees.
-
longitude -
Longitude in degrees.
返回值
Returns array on success 或者在失敗時返回 false.
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.
更新日誌
| 版本 | 說明 |
|---|---|
| 7.2.0 | The calculation was fixed with regards to local midnight instead of local noon, which changes the results slightly. |
範例
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";
}
?>
以上例程會輸出：
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
<?php
var_dump(date_sun_info(strtotime("2017-12-21"), 90, 0));
?>
以上例程會輸出：
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)
}
示例 #3 Midnight sun
<?php
var_dump(date_sun_info(strtotime("2017-06-21"), 90, 0));
?>
以上例程會輸出：
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)
}