PHP 7.2.7 Released


(PHP 5, PHP 7)

date_sunriseReturns time of sunrise for a given day and location


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


The timestamp of the day from which the sunrise time is taken.


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


Defaults to North, pass in a negative value for South. See also: date.default_latitude


Defaults to East, pass in a negative value for West. See also: date.default_longitude


zenith is the angle between the center of the sun and a line perpendicular to earth's surface. It defaults to date.sunrise_zenith

Common zenith angles
Angle Description
90°50' Sunrise: the point where the sun becomes visible.
96° Civil twilight: conventionally used to signify the start of dawn.
102° Nautical twilight: the point at which the horizon starts being visible at sea.
108° Astronomical twilight: the point at which the sun starts being the source of any illumination.


Specified in hours. The gmtoffset is ignored, if format is SUNFUNCS_RET_TIMESTAMP.

Valori restituiti

Returns the sunrise time in a specified format on success o FALSE in caso di fallimento. One potential reason for failure is that the sun does not rise at all, which happens inside the polar circles for part of the year.


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

Ora emette gli errori time zone E_STRICT e E_NOTICE


Example #1 date_sunrise() example


/* 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

Example #2 No sunrise

var_dump(date_sunrise($solsticeSUNFUNCS_RET_STRING69.245833, -53.537222));

Il precedente esempio visualizzerà:


Vedere anche:

  • date_sunset() - Returns time of sunset for a given day and location
  • date_sun_info() - Returns an array with information about sunset/sunrise and twilight begin/end

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User Contributed Notes 3 notes

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.


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

$time->getOffset() / 3600
nomail at nospam dot com
2 months ago
maybe I am wrong, but I think


SUNFUNCS_RET_STRING     Return local time
SUNFUNCS_RET_DOUBLE     Return local time
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:

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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