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Tidal Stations - North America (West Coast)
02-25-2014
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DATE_SUNSET(3) 1 DATE_SUNSET(3) date_sunset - Returns time of sunset for a given day and location SYNOPSIS
mixed date_sunset (int $timestamp, [int $format = SUNFUNCS_RET_STRING], [float $latitude = ini_get("date.default_latitude")], [float $longitude = ini_get("date.default_longitude")], [float $zenith = ini_get("date.sunset_zenith")], [float $gmt_offset]) DESCRIPTION
date_sunset(3) returns the sunset time for a given day (specified as a $timestamp) and location. PARAMETERS
o $timestamp - The $timestamp of the day from which the sunset time is taken. o $format - $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 | | | | +-----------------------+-------------------------------------------+ o $latitude - Defaults to North, pass in a negative value for South. See also: date.default_latitude o $longitude - Defaults to East, pass in a negative value for West. See also: date.default_longitude o $zenith - Default: date.sunset_zenith o $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 or E_WARNING message if using the system settings or the $TZ environment variable. See also date_default_timezone_set(3) CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.1.0 | | | | | | | 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(3) 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 SEE ALSO
date_sunrise(3). PHP Documentation Group DATE_SUNSET(3)
