PHP date_sunset() Function

Definition and Usage

The date_sunset() function returns the time of sunset for a specified day and location.

Syntax

date_sunset(timestamp,format,latitude,longitude,zenith,gmt_offset)

Parameter	Description
timestamp	Required.
format	Optional. Specifies how to return the result: SUNFUNCS_RET_STRING (returns the result as string. e.g. 16:46) SUNFUNCS_RET_DOUBLE (returns the result as float. e.g. 16.78243132) SUNFUNCS_RET_TIMESTAMP (returns the result as integer (timestamp). e.g. 1095034606)
latitude	Optional. Specifies the latitude of the location. The latitude defaults to North. If you want to specify a South value, you must pass a negative value.
longitude	Optional. Specifies the longitude of the location. The longitude defaults to East. If you want to specify a West value, you must pass a negative value.
zenith	Optional.
gmt_offset	Optional. Specifies the difference between GMT and local time in hours.

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Example

<?php
//Calculate the sunset time for Lisbon, Portugal
//Latitude: 38.4 North
//Longitude: 9 West
//Zenith ~= 90
//offset: +1 GMT
echo("Date: " . date("D M d Y") . "<br />");
echo("Sunset time: ");
echo(date_sunset(time(),SUNFUNCS_RET_STRING,38.4,-9,90,1));
?>

 

OUTPUT :

Date: Tue Jan 24 2006
Sunset time: 18:44