Syntax of date_sunrise in PHP
mixed date_sunrise(int timestamp[, int format[, float latitude[, float longitude
[, float zenith[, float gmt_offset]]]]])
Returns the time of the sunrise for the day in timestamp; false on failure. The format parameter determines the format the time is returned as (with a default of SUNFUNCS_RET_STRING), while the latitude, longitude, zenith, and gmt_offset parameters provide a specific location. They default to values given in the PHP configuration options (php.ini). Parameters include:
SUNFUNCS_RET_STRING Returns the value as a string; for example, “06:14”
SUNFUNCS_RET_DOUBLE Returns the value as a float; for example, 6.233
SUNFUNCS_RET_TIMESTAMP Returns the value as a Unix epochal timestamp
Example of date_sunrise
<?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);
?>