//print (date_sunrise(time(), SUNFUNCS_RET_STRING, 47.45717, 17.39058, 103.5, +1));
//print (date_sunset(time(), SUNFUNCS_RET_STRING, 47.45717, 17.39058, 103.5, +1));
if ( time() < date_sunset(time(), SUNFUNCS_RET_TIMESTAMP, 47.45717, 17.39058, 103.5, +1) &&
time() > date_sunrise(time(), SUNFUNCS_RET_TIMESTAMP, 47.45717, 17.39058, 103.5, +1) ) {
echo "";
}