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# date_sunset

(PHP 5)

date_sunset -- Returns time of sunset for a given day and location

## Beschreibung

mixed date_sunset ( int timestamp [, int format [, float latitude [, float longitude [, float zenith [, float gmt_offset]]]]] )

date_sunset() returns the sunset time for a given day (specified as a `timestamp`) and location.

## Parameter Liste

`timestamp`

  The `timestamp` of the day from which the sunset time is taken.

`format`

  Tabelle 1. `format` constants

  constant | description | example
  --- | --- | ---
  SUNFUNCS_RET_STRING | returns the result as string | 16:46
  SUNFUNCS_RET_DOUBLE | returns the result as float | 16.78243132
  SUNFUNCS_RET_TIMESTAMP | returns the result as integer (timestamp) | 1095034606

`latitude`

  Defaults to North, pass in a negative value for South. See also: `date.default_latitude`

`longitude`

  Defaults to East, pass in a negative value for West. See also: `date.default_longitude`

`zenith`

  Default: `date.sunrise_zenith`

`gmtoffset`

  Specified in hours.

## Errors/Exceptions

Every call to a date/time function will generate a `E_NOTICE` if the time zone is not valid, and/or a `E_STRICT` message if using the system settings or the `TZ` environment variable. See also date_default_timezone_set()

## ChangeLog

Version | Beschreibung
--- | ---
5.1.0 | Now issues the `E_STRICT` and `E_NOTICE` time zone errors.

## Rückgabewerte

Returns the sunset time in a specified `format` on success, or `FALSE` on failure.

## Beispiele

Beispiel 1. date_sunset() example
`<?php /* calculate the sunset time for Lisbon, Portugal Latitude: 38.4 North Longitude: 9 West Zenith ~= 90 offset: +1 GMT */ echo date("D M d Y"). ', sunset time : ' .date_sunset(time(), SUNFUNCS_RET_STRING, 38.4, -9, 90, 1); ?>`
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
    Mon Dec 20 2004, sunset time : 18:13

## Siehe auch

date_sunrise()

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