二十四节气——正解反解


<?php
$xingxiu =new jieqi;
// var_dump($xingxiu->getJieQi(2021,6,5));
$term_name = array("小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种", "夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至");foreach ($term_name as $key => $value) {echo $value.":".$xingxiu->getJieQi2(2021,$key )."<br>";}  die;class jieqi{/** 节气通用算法*/function getJieQi($_year,$month,$day){$year = substr($_year,-2)+0;$coefficient = array(array(5.4055,2019,-1),//小寒array(20.12,2082,1),//大寒array(3.87),//立春array(18.74,2026,-1),//雨水array(5.63),//惊蛰array(20.646,2084,1),//春分array(4.81),//清明array(20.1),//谷雨array(5.52,1911,1),//立夏array(21.04,2008,1),//小满array(5.678,1902,1),//芒种array(21.37,1928,1),//夏至array(7.108,2016,1),//小暑array(22.83,1922,1),//大暑array(7.5,2002,1),//立秋array(23.13),//处暑array(7.646,1927,1),//白露array(23.042,1942,1),//秋分array(8.318),//寒露array(23.438,2089,1),//霜降array(7.438,2089,1),//立冬array(22.36,1978,1),//小雪array(7.18,1954,1),//大雪array(21.94,2021,-1)//冬至);//     计算公式：[Y*D+C]-L
// 公式解读：年数的后2位乘0.2422加3.87取整数减闰年数。21世纪C值=3.87，22世纪C值=4.15。
//https://weibo.com/ttarticle/p/show?id=2309404346851301159219$term_name = 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);//计算闰年$day1 = floor($year*0.2422+$coefficient[$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.'<br/>'.chr(10);$data=array();if($day==$day1){$data['name1']=$term_name[$idx1];$data['name2']=$term_name[$idx1];} return $data;} /** 节气通用算法*/function getJieQi2($_year,$idx1){$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);$term_name = array("小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至");$month =floor(($idx1/2)+1);$_leap_value = floor(($year-1)/4);//计算闰年数量$day1 = floor($year*0.2422+$coefficient[$idx1][0])-$_leap_value;return $month."月".$day1;} }

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二十四节气——正解反解

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