date_sunrise

(PHP 5)

date_sunriseReturns time of sunrise for a given day and location

Descrizione

mixed date_sunrise ( 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.sunrise_zenith") [, float $gmt_offset = 0 ]]]]] )

date_sunrise() returns the sunrise time for a given day (specified as a timestamp) and location.

Elenco dei parametri

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.

Valori restituiti

Returns the sunrise time in a specified format on success o FALSE in caso di fallimento.

Errori/Eccezioni

Ogni chiamata a una funzione data/ora genera un E_NOTICE se il time zone non è valido, e/o un messaggio E_STRICT o E_WARNING se si usano le impostazioni di sistema o la variabile d'ambiente TZ. Vedere anche date_default_timezone_set()

Log delle modifiche

Versione Descrizione
5.1.0

Ora emette gli errori time zone E_STRICT e E_NOTICE

Esempi

Example #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_STRING38.4, -9901);

?>

Il precedente esempio visualizzerà qualcosa simile a:

Mon Dec 20 2004, sunrise time : 08:54

Vedere anche:

  • date_sunset() - Returns time of sunset for a given day and location

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User Contributed Notes 3 notes

up
0
nomail at nospam dot com
25 days ago
maybe I am wrong, but I think

SUNFUNCS_RET_TIMESTAMP     return GMT(0) time

SUNFUNCS_RET_STRING     Return local time
SUNFUNCS_RET_DOUBLE     Return local time
up
0
scottix at gmail dot com
4 years ago
If you are working in multiple timezones getting the offset from a date is a little tricky because you need it in hours.

<?php

$time
= new DateTime('now', new DateTimeZone('America/Los_Angeles'));

date_sunrise(
$time->getTimestamp(),
SUNFUNCS_RET_TIMESTAMP,
38.4,
-
9,
90,
$time->getOffset() / 3600
);
up
-3
jonathanNO dot kuhnSPAM at gmailNOSPAM dot com
8 years ago
After some searching, I finally found a website that can calculate the sun's zenith. Just look up your city's lat/long (remember, west/south are negative even if it doesn't show where you look up the lat/long) and the time of sunrise/sunset and use this site:

http://solardat.uoregon.edu/cgi-bin/SolarPositionCalculator.cgi

You have to enter in the sunrise/sunset times separately, but it works.
San Diego is:
Lat: 32.73
Long: -117.17
Sunrise Z.: 90.7379
Sunset Z.: 90.8880
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