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Text lesson

date_sunset()

Example

Retrieve the sunset time for Lisbon, Portugal, today.

<?php
// Lisbon, Portugal:
// Latitude: 38.4 North, Longitude: 9 West
// Zenith ~= 90, offset: +1 GMT

echo(“Lisbon, Portugal: Date: “ . date(“D M d Y”));
echo(“<br>Sunset time: “);
echo(date_sunset(time(),SUNFUNCS_RET_STRING,38.4,-9,90,1));
?>

Definition and Usage

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

Tip: Use the date_sunrise() function to get the sunrise time for a specific day and location.

Syntax

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

Parameter Values

Parameter	Description
timestamp	Required. Specifies the timestamp of the day for which the sunset time is calculated.
format	Optional. Specifies the format for the result: SUNFUNCS_RET_STRING (returns the result as a string, e.g., 16:46) (default) SUNFUNCS_RET_DOUBLE (returns the result as a float, e.g., 16.78243132) SUNFUNCS_RET_TIMESTAMP (returns the result as an integer timestamp, e.g., 1095034606)
latitude	Optional. Specifies the latitude of the location. Defaults to North; use a negative value for South.
longitude	Optional. Specifies the longitude of the location. Defaults to East; use a negative value for West.
zenith	Optional. Defaults to date.sunset_zenith.
gmtoffset	Optional. Specifies the difference in hours between GMT and local time.

Technical Details

Return Value:	Returns the sunset time in the specified format on success; FALSE on failure.
PHP Version:	5+
Changelog:	Starting from PHP 5.1.0, this function generates E_STRICT and E_NOTICE time zone errors.