(PHP 5, PHP 7)
date_sunrise — Returns time of sunrise for a given day and location
$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.
  
timestamp
       The timestamp of the day from which the sunrise
       time is taken.
      
format
| 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 | 
latitudeDefaults to North, pass in a negative value for South. See also: date.default_latitude
longitudeDefaults to East, pass in a negative value for West. See also: date.default_longitude
zenithDefault: date.sunrise_zenith
gmtoffsetSpecified in hours.
   Returns the sunrise time in a specified format on
   success or FALSE on failure.
  
Every call to a date/time function will generate a E_NOTICE
if the time zone is not valid, and/or a E_STRICT
or E_WARNING message
if using the system settings or the TZ environment
variable. See also date_default_timezone_set()
| Version | Description | 
|---|---|
| 5.1.0 | 
Now issues the  | 
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