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date_sunset
Returns time of sunset for a given day and location
(PHP 5)
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.
Parameters
- timestamp
The timestamp of the day from which the sunset time is taken.
- format
Table 41. 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()
Examples
Example 444. 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);
?>The above example will output something similar to:
Mon Dec 20 2004, sunset time : 18:13
| date_sunrise() |