PHP date_sunset function

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date_sunset

(PHP 5)

date_sunset —
Returns time of sunset for a given day and location
Descriptionmixed 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 1. format constants

constantdescriptionexampleSUNFUNCS_RET_STRINGreturns the result as string16:46SUNFUNCS_RET_DOUBLEreturns the result as float16.78243132SUNFUNCS_RET_TIMESTAMPreturns 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

VersionDescription5.1.0

Now issues the E_STRICT and E_NOTICE
time zone errors.


Return Values

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

Examples

Example 1. date_sunset() example

 
/* 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

See Also

date_sunrise()


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Published:
2.26.07 / 1am
Category:
PHP Functions
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