(PHP 5, PHP 7, PHP 8)
date_sunrise — Returns time of sunrise for a given day and location
This function has been DEPRECATED as of PHP 8.1.0. Relying on this function is highly discouraged. Use date_sun_info() instead.
$timestamp
,$returnFormat
= SUNFUNCS_RET_STRING
,$latitude
= null
,$longitude
= null
,$zenith
= null
,$utcOffset
= null
date_sunrise() returns the sunrise time for a given
day (specified as a timestamp
) and location.
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
.
Returns the sunrise time in a specified returnFormat
on
success or false
on failure. 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.
Every call to a date/time function will generate a E_WARNING
if the time zone is not valid. See also date_default_timezone_set()
Version | Description |
---|---|
8.1.0 | This function has been deprecated in favor of date_sun_info(). |
8.0.0 |
latitude , longitude ,
zenith and utcOffset are nullable now.
|
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_STRING, 38.4, -9, 90, 1);
?>
The above example will output something similar to:
Mon Dec 20 2004, sunrise time : 08:54
Example #2 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:
bool(false)