给出一个日期,判断是否是某个节气,或某节气的后

function getJieQi($year,$month,$day)   
{   
         $year = substr($year,-2)+0;   
         $coefficient = array(   
             array(5.4055,2019,-1),//小寒   
             array(20.12,2082,1),//大寒   
             array(3.87),//立春   
             array(18.74,2026,-1),//雨水   
             array(5.63),//惊蛰   
             array(20.646,2084,1),//春分   
             array(4.81),//清明   
             array(20.1),//谷雨   
             array(5.52,1911,1),//立夏   
             array(21.04,2008,1),//小满   
             array(5.678,1902,1),//芒种   
             array(21.37,1928,1),//夏至   
             array(7.108,2016,1),//小暑   
             array(22.83,1922,1),//大暑   
             array(7.5,2002,1),//立秋   
             array(23.13),//处暑   
             array(7.646,1927,1),//白露   
             array(23.042,1942,1),//秋分   
             array(8.318),//寒露   
             array(23.438,2089,1),//霜降   
             array(7.438,2089,1),//立冬   
             array(22.36,1978,1),//小雪   
             array(7.18,1954,1),//大雪   
             array(21.94,2021,-1)//冬至   
         );   
         $termname = array(      
         "小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨",      
         "立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑",      
         "白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至");   
             
         $idx1 = ($month-1)2;   
         $_leap_value = floor(($year-1)/4);   
         $day1 = floor($year0.2422+$coefficient[$idx1][0])-$leap_value;
         if(isset($coefficient[$idx1][1])&&$coefficient[$idx1][1]==$_year) $day1 += $coefficient[$idx1][2];   
         $day2 = floor($year*0.2422+$coefficient[$idx1+1][0])-$_leap_value;   
         if(isset($coefficient[$idx1+1][1])&&$coefficient[$idx1+1][1]==$_year) $day1 += $coefficient[$idx1+1][2];   
            
         //echo __FILE.'->'.__LINE.' $day1='.$day1,',$day2='.$day2.''.chr(10);
         $data=array();
         if($day<$day1){
             $data['name1']=$term_name[$idx1-1];
             $data['name2']=$term_name[$idx1-1].'后';
         }else if($day==$day1){
             $data['name1']=$term_name[$idx1];
             $data['name2']=$term_name[$idx1];
         }else if($day>$day1 && $day<$day2){
             $data['name1']=$term_name[$idx1];
             $data['name2']=$term_name[$idx1].'后';
         }else if($day==$day2){
             $data['name1']=$term_name[$idx1+1];
             $data['name2']=$term_name[$idx1+1];
         }else if($day>$day2){
             $data['name1']=$term_name[$idx1+1];
             $data['name2']=$term_name[$idx1+1].'后';
         }
         return $data;
}