Compzone.Org :: Podręcznik PHP :: date_sunset

Podręcznik PHP
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date_sunset

(PHP 5)

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

Description

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. The latitude, longitude and zenith parameters default to the date.default_latitude, date.default_longitude and date.sunset_zenith configuration options, respectively.

The latitude defaults to North. So, if you want to specify a South value, you must pass a negative value. The same note applies to longitude, which defaults to East.

The gmt_offset parameter is specified in hours.

Tabela 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

Przykład 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);


                
?>

Powyższy przykład wyświetli coś podobnego do:

Mon Dec 20 2004, sunset time : 18:13