date_sunrise

This function has been DEPRECATED as of PHP 8.1.0. Relying on this function is highly discouraged. Use date_sun_info() instead.

Description

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

Parameters

timestamp

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

returnFormat

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 int (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

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.

utcOffset

Specified in hours. The utcOffset is ignored, if returnFormat is SUNFUNCS_RET_TIMESTAMP.

Return Values

Returns the sunrise time in a specified returnFormat on successFalseforfailure. 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.

Errors/Exceptions Description

Changelog

Examples

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);

The above example will output something similar to:

Deprecated: Constant SUNFUNCS_RET_STRING is deprecated in script on line 10
Deprecated: Function date_sunrise() is deprecated since 8.1, use date_sun_info() instead in script on line 10
Mon Dec 20 2004, sunrise time : 08:54

No sunrise

<?php
$solstice = strtotime('2017-12-21');
var_dump(date_sunrise($solstice, SUNFUNCS_RET_STRING, 69.245833, -53.537222));

The above example will output:

Deprecated: Constant SUNFUNCS_RET_STRING is deprecated in script on line 3
Deprecated: Function date_sunrise() is deprecated since 8.1, use date_sun_info() instead in script on line 3
bool(false)

See Also

• date_sun_info()