date_sun_info
Just for those that are as stupid as me
for the settings in php.ini and sunrise/sunset after googling for a while if found this info
;`Zenith' is the angle that the centre of the Sun makes to a line perpendicular to the Earth's surface.
;
; The best Overall figure for zenith is 90+(50/60) degrees for true sunrise/sunset
; Civil twilight 96 degrees - Conventionally used to signify twilight
; Nautical twilight 102 degrees - the point at which the horizon stops being visible at sea.
; Astronical twilight at 108 degrees - the point when Sun stops being a source of any illumination.
;
;date.sunrise_zenith = 90.583333 85.4
;date.sunset_zenith = 90.583333 85.4
date_sunrise
(PHP 5)
date_sunrise — Returns time of sunrise for a given day and location
Описание
mixed date_sunrise
( int $timestamp
[, int $format
[, float $latitude
[, float $longitude
[, float $zenith
[, float $gmt_offset
]]]]] )
date_sunrise() returns the sunrise time for a given day (specified as a timestamp ) and location.
Список параметров
- timestamp
-
The timestamp of the day from which the sunrise time is taken.
- 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 - 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.
Возвращаемые значения
Returns the sunrise time in a specified format on success, or FALSE on failure.
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()
Список изменений
| Версия | Описание |
|---|---|
| 5.1.0 | Now issues the E_STRICT and E_NOTICE time zone errors. |
Примеры
Пример #1 date_sunrise() example
<?php
/* calculate the sunrise time for Lisbon, Portugal
Latitude: 38.4 North
Longitude: 9 West
Zenith ~= 90
offset: +1 GMT
*/
echo date("D M d Y"). ', sunrise time : ' .date_sunrise(time(), SUNFUNCS_RET_STRING, 38.4, -9, 90, 1);
?>
Результатом выполнения данного примера будет что-то подобное:
Mon Dec 20 2004, sunrise time : 08:54
add a note
User Contributed Notesdate_sunrise
fingers at 4tfingers dot info
26-Apr-2008 05:47
26-Apr-2008 05:47
djwice at [the same] dot com
02-Dec-2004 10:41
02-Dec-2004 10:41
The way to use this:
<?php
// De Bilt, The Netherlands, weather station #06260
$lat = 52.10; // North
$long = 5.18; // East
$offset = 1; // difference between GMT and local time in hours
$zenith=90+50/60;
echo "<br><p>Sunrise: ".date_sunrise(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
echo "<br>Sunset: ".date_sunset(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
$zenith=96;
echo "<br><p>Civilian Twilight start: ".date_sunrise(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
echo "<br>Civilian Twilight end: ".date_sunset(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
$zenith=102;
echo "<br><p>Nautical Twilight start: ".date_sunrise(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
echo "<br>Nautical Twilight end: ".date_sunset(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
$zenith=108;
echo "<br><p>Astronomical Twilight start: ".date_sunrise(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
echo "<br>Astronomical Twilight end: ".date_sunset(time(), SUNFUNCS_RET_STRING, $lat, $long, $zenith, $offset);
?>
Zenith according to the U.S. Navy's 1990 Almanac for Computers.
Thanks to George King.
More sources about this topic:
http://www.qarlos.free.fr/navegacion/Sextante/formulas.htm
http://williams.best.vwh.net/sunrise_sunset_algorithm.htm
http://www.kevinboone.com/suntimes.html
http://star-www.st-and.ac.uk/~fv/webnotes/chapt12.htm