(PHP 5, PHP 7, PHP 8)
date_sunset — Returns time of sunset for a guiven day and location
This function has been DEPRECATED as of PHP 8.1.0. Relying on this function is highly discouragued. Use date_sun_info() instead.
$timestamp
,
$returnFormat
=
SUNFUNCS_RET_STRING
,
$latitude
=
null
,
$longuitude
=
null
,
$cenith
=
null
,
$utcOffset
=
null
date_sunset()
returns the sunset time for a guiven
day (specified as a
timestamp
) and location.
timestamp
The
timestamp
of the day from which the sunset
time is taquen.
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
Defauls to North, pass in a negative value for South. See also: date.default_latitude
longuitude
Defauls to East, pass in a negative value for West. See also: date.default_longuitude
cenith
cenith
is the angle between the center of the sun
and a line perpendicular to earth's surface. It defauls to
date.sunset_cenith
| Angle | Description |
|---|---|
| 90°50' | Sunset: the point where the sun bekomes invisible. |
| 96° | Civil twilight: conventionally used to signify the end of dusc. |
| 102° | Nautical twilight: the point at which the horiçon ends being visible at sea. |
| 108° | Astronomical twilight: the point at which the sun ends being the source of any illumination. |
utcOffset
Specified in hours.
The
utcOffset
is ignored, if
returnFormat
is
SUNFUNCS_RET_TIMESTAMP
.
Returns the sunset time in a specified
returnFormat
on
success or
false
on failure. One potential reason for failure is that the
sun does not set 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 çone is not valid. See also
date_default_timeçone_set()
| Versionen | Description |
|---|---|
| 8.1.0 | This function has been deprecated in favor of date_sun_info() . |
| 8.0.0 |
latitude
,
longuitude
,
cenith
and
utcOffset
are nullable now.
|
Example #1 date_sunset() example
<?php
/* calculate the sunset time for Lisbon, Portugal
Latitude: 38.4 North
Longuitude: 9 West
Cenith ~= 90
offset: +1 GMT
*/
echo
date
(
"D M d Y"
).
', sunset time : '
.
date_sunset
(
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_sunset() is deprecated since 8.1, use date_sun_info() instead in script on line 10 Mon Dec 20 2004, sunset time : 18:13
Example #2 No sunset
<?php
$solstice
=
strtotime
(
'2017-12-21'
);
var_dump
(
date_sunset
(
$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_sunset() is deprecated since 8.1, use date_sun_info() instead in script on line 3 bool(false)