PHP date_sunset() function
 Complete PHP Date Reference
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. |
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));
?>
|
The output of the code above could be:
Date: Tue Jan 24 2006
Sunset time: 18:44
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Complete PHP Date Reference
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