date_sun_info() function in PHP

date_sun_info() function returns an array containing information about sunset/sunrise and twilight start/end.

Syntax

date_sun_info(timestamp, latitude, longitude)

Parameters

• Timestamp - Timestamp. Required.

• Latitude - Latitude in degrees. Required

• Longitude - Longitude in degrees. Required

Returns

The date_sun_info() function returns an array containing information about sunset/sunrise and twilight start/end.

The structure of the array is detailed in the following list -

• sunrise - The time of sunrise (zenith angle = 90°35 ').

• Sunset - Sunset time (zenith angle = 90°35').

• Transit - The time when the Sun is at its zenith, that is, when it reaches its highest point.

• Civil_twilight_begin - The beginning of civil twilight (zenith angle = 96°). It ends at sunrise.

• civil_twilight_end - The end of civil twilight (zenith angle = 96°). It starts at sunset.

• nautical_twilight_begin - Beginning of nautical twilight (zenith angle = 102°). It ends with Civil_twilight_begin.

• nautical_twilight_end - End of nautical twilight (zenith angle = 102°). It starts with Civil_twilight_end.

• astronomical_twilight_begin - The beginning of astronomical twilight (zenith angle = 108°). It ends with nautical_twilight_begin.

• astronomical_twilight_end - The end of astronomical twilight (zenith angle = 108°). It starts with nautical_twilight_end.

Example

The following is an example -

Real-time demonstration

<?php
$info = date_sun_info(strtotime("2018-09-23"), 31.7667, 35.2333); foreach ($info as $key => $val) {
   echo "$key: " . date("H:i:s", $val) . "</p><p>";
}
?>

Output

sunrise: 03:28:06
sunset: 15:34:29
transit: 09:31:18
civil_twilight_begin: 03:03:51
civil_twilight_end: 15:58:44
nautical_twilight_begin: 02:35:30
nautical_twilight_end: 16:27:05
astronomical_twilight_begin: 02:06:54
astronomical_twilight_end: 16:55:41

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