date_sunrise

(PHP 5, PHP 7)

date_sunriseReturns time of sunrise for a given day and location

Descrierea

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 ]]]]] ) : mixed

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

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

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.

gmtoffset

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

Valorile întoarse

Returns the sunrise time in a specified format on success sau FALSE în cazul eșecului. 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.

Erori/Excepții

Fiecare apel al unei funcții de dată/oră va genera o E_NOTICE dacă zona orară nu este validă și/sau un mesaj E_STRICT sau E_WARNING dacă se utilizează setările sistemului sau variabila de mediu TZ. Vedeți de asemenea date_default_timezone_set()

Istoricul schimbărilor

Versiune Descriere
5.1.0

Acum generează erori ale zonei orare de tip E_STRICT și E_NOTICE.

Exemple

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);

?>

Exemplul de mai sus va afișa ceva similar cu:

Mon Dec 20 2004, sunrise time : 08:54

Example #2 No sunrise

<?php
$solstice 
strtotime('2017-12-21');
var_dump(date_sunrise($solsticeSUNFUNCS_RET_STRING69.245833, -53.537222));
?>

Exemplul de mai sus va afișa:

bool(false)

A se vedea și

  • 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