2010-12-02 68 views

回答

4
// calculate lunar phase (1900 - 2199) 
$year = date('Y'); 
$month = date('n'); 
$day = date('j'); 
if ($month < 4) {$year = $year - 1; $month = $month + 12;} 
$days_y = 365.25 * $year; 
$days_m = 30.42 * $month; 
$julian = $days_y + $days_m + $day - 694039.09; 
$julian = $julian/29.53; 
$phase = intval($julian); 
$julian = $julian - $phase; 
$phase = round($julian * 8 + 0.5); 
if ($phase == 8) {$phase = 0;} 
$phase_array = array('new', 'waxing crescent', 'first quarter', 'waxing gibbous', 'full', 'waning gibbous', 'last quarter', 'waning crescent'); 
$lunar_phase = $phase_array[$phase];