最近对阳历转阴历从而得到相应节日的算法这方面比较感兴趣，于是就在网上搜了一圈。不错，还算是找到一个比较不错的php类，实现了将阳历转换为阴历（农历），阴历转换为阳历的算法，同时还能获取干支纪年，生肖，以及相应的阴历的中文叫法等等，功能还是挺齐全的，在这里分享给大家。具体类代码如下：

class Lunar{   var $MIN_YEAR=1891;   var $MAX_YEAR=2100;   var $lunarInfo=array(     array(0,2,9,21936),array(6,1,30,9656),array(0,2,17,9584),array(0,2,6,21168),array(5,1,26,43344),array(0,2,13,59728),     array(0,2,2,27296),array(3,1,22,44368),array(0,2,10,43856),array(8,1,30,19304),array(0,2,19,19168),array(0,2,8,42352),     array(5,1,29,21096),array(0,2,16,53856),array(0,2,4,55632),array(4,1,25,27304),array(0,2,13,22176),array(0,2,2,39632),     array(2,1,22,19176),array(0,2,10,19168),array(6,1,30,42200),array(0,2,18,42192),array(0,2,6,53840),array(5,1,26,54568),     array(0,2,14,46400),array(0,2,3,54944),array(2,1,23,38608),array(0,2,11,38320),array(7,2,1,18872),array(0,2,20,18800),     array(0,2,8,42160),array(5,1,28,45656),array(0,2,16,27216),array(0,2,5,27968),array(4,1,24,44456),array(0,2,13,11104),     array(0,2,2,38256),array(2,1,23,18808),array(0,2,10,18800),array(6,1,30,25776),array(0,2,17,54432),array(0,2,6,59984),     array(5,1,26,27976),array(0,2,14,23248),array(0,2,4,11104),array(3,1,24,37744),array(0,2,11,37600),array(7,1,31,51560),     array(0,2,19,51536),array(0,2,8,54432),array(6,1,27,55888),array(0,2,15,46416),array(0,2,5,22176),array(4,1,25,43736),     array(0,2,13,9680),array(0,2,2,37584),array(2,1,22,51544),array(0,2,10,43344),array(7,1,29,46248),array(0,2,17,27808),     array(0,2,6,46416),array(5,1,27,21928),array(0,2,14,19872),array(0,2,3,42416),array(3,1,24,21176),array(0,2,12,21168),     array(8,1,31,43344),array(0,2,18,59728),array(0,2,8,27296),array(6,1,28,44368),array(0,2,15,43856),array(0,2,5,19296),     array(4,1,25,42352),array(0,2,13,42352),array(0,2,2,21088),array(3,1,21,59696),array(0,2,9,55632),array(7,1,30,23208),     array(0,2,17,22176),array(0,2,6,38608),array(5,1,27,19176),array(0,2,15,19152),array(0,2,3,42192),array(4,1,23,53864),     array(0,2,11,53840),array(8,1,31,54568),array(0,2,18,46400),array(0,2,7,46752),array(6,1,28,38608),array(0,2,16,38320),     array(0,2,5,18864),array(4,1,25,42168),array(0,2,13,42160),array(10,2,2,45656),array(0,2,20,27216),array(0,2,9,27968),     array(6,1,29,44448),array(0,2,17,43872),array(0,2,6,38256),array(5,1,27,18808),array(0,2,15,18800),array(0,2,4,25776),     array(3,1,23,27216),array(0,2,10,59984),array(8,1,31,27432),array(0,2,19,23232),array(0,2,7,43872),array(5,1,28,37736),     array(0,2,16,37600),array(0,2,5,51552),array(4,1,24,54440),array(0,2,12,54432),array(0,2,1,55888),array(2,1,22,23208),     array(0,2,9,22176),array(7,1,29,43736),array(0,2,18,9680),array(0,2,7,37584),array(5,1,26,51544),array(0,2,14,43344),     array(0,2,3,46240),array(4,1,23,46416),array(0,2,10,44368),array(9,1,31,21928),array(0,2,19,19360),array(0,2,8,42416),     array(6,1,28,21176),array(0,2,16,21168),array(0,2,5,43312),array(4,1,25,29864),array(0,2,12,27296),array(0,2,1,44368),     array(2,1,22,19880),array(0,2,10,19296),array(6,1,29,42352),array(0,2,17,42208),array(0,2,6,53856),array(5,1,26,59696),     array(0,2,13,54576),array(0,2,3,23200),array(3,1,23,27472),array(0,2,11,38608),array(11,1,31,19176),array(0,2,19,19152),     array(0,2,8,42192),array(6,1,28,53848),array(0,2,15,53840),array(0,2,4,54560),array(5,1,24,55968),array(0,2,12,46496),     array(0,2,1,22224),array(2,1,22,19160),array(0,2,10,18864),array(7,1,30,42168),array(0,2,17,42160),array(0,2,6,43600),     array(5,1,26,46376),array(0,2,14,27936),array(0,2,2,44448),array(3,1,23,21936),array(0,2,11,37744),array(8,2,1,18808),     array(0,2,19,18800),array(0,2,8,25776),array(6,1,28,27216),array(0,2,15,59984),array(0,2,4,27424),array(4,1,24,43872),     array(0,2,12,43744),array(0,2,2,37600),array(3,1,21,51568),array(0,2,9,51552),array(7,1,29,54440),array(0,2,17,54432),     array(0,2,5,55888),array(5,1,26,23208),array(0,2,14,22176),array(0,2,3,42704),array(4,1,23,21224),array(0,2,11,21200),     array(8,1,31,43352),array(0,2,19,43344),array(0,2,7,46240),array(6,1,27,46416),array(0,2,15,44368),array(0,2,5,21920),     array(4,1,24,42448),array(0,2,12,42416),array(0,2,2,21168),array(3,1,22,43320),array(0,2,9,26928),array(7,1,29,29336),     array(0,2,17,27296),array(0,2,6,44368),array(5,1,26,19880),array(0,2,14,19296),array(0,2,3,42352),array(4,1,24,21104),     array(0,2,10,53856),array(8,1,30,59696),array(0,2,18,54560),array(0,2,7,55968),array(6,1,27,27472),array(0,2,15,22224),     array(0,2,5,19168),array(4,1,25,42216),array(0,2,12,42192),array(0,2,1,53584),array(2,1,21,55592),array(0,2,9,54560)   );   /**   * 将阳历转换为阴历   * @param year 公历-年   * @param month 公历-月   * @param date 公历-日   */   function convertSolarToLunar($year,$month,$date){//debugger;     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     if($year==$this->MIN_YEAR&&$month<=2&&$date<=9){       return array(1891,"正月","初一","辛卯",1,1,"兔");     }     return $this->getLunarByBetween($year,$this->getDaysBetweenSolar($year,$month,$date,$yearData[1],$yearData[2]));   }   function convertSolarMonthToLunar($year,$month){     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     if($year==$this->MIN_YEAR&&$month<=2&&$date<=9){       return array(1891,"正月","初一","辛卯",1,1,"兔");     }     $month_days_ary=array(31,28,31,30,31,30,31,31,30,31,30,31);     $dd=$month_days_ary[$month];     if($this->isLeapYear($year)&& $month==2)$dd++;     $lunar_ary=array();     for ($i=1;$i<$dd;$i++){       $array=$this->getLunarByBetween($year,$this->getDaysBetweenSolar($year,$month,$i,$yearData[1],$yearData[2]));       $array[]=$year."-".$month."-".$i;       $lunar_ary[$i]=$array;     }     return $lunar_ary;   }   /**   * 将阴历转换为阳历   * @param year 阴历-年   * @param month 阴历-月，闰月处理：例如如果当年闰五月，那么第二个五月就传六月，相当于阴历有13个月，只是有的时候第13个月的天数为0   * @param date 阴历-日   */   function convertLunarToSolar($year,$month,$date){     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     $between=$this->getDaysBetweenLunar($year,$month,$date);     $res=mktime(0,0,0,$yearData[1],$yearData[2],$year);     $res=date("Y-m-d",$res+$between*24*60*60);     $day=explode("-",$res);     $year=$day[0];     $month=$day[1];     $day=$day[2];     return array($year,$month,$day);   }   /**   * 判断是否是闰年   * @param year   */   function isLeapYear($year){     return (($year%4==0&&$year%100!=0)||($year%400==0));   }   /**   * 获取干支纪年   * @param year   */   function getLunarYearName($year){     $sky=array("庚","辛","壬","癸","甲","乙","丙","丁","戊","己");     $earth=array("申","酉","戌","亥","子","丑","寅","卯","辰","巳","午","未");     $year=$year."";     return $sky[$year{3}].$earth[$year%12];   }   /**   * 根据阴历年获取生肖   * @param year 阴历年   */   function getYearZodiac($year){     $zodiac=array("猴","鸡","狗","猪","鼠","牛","虎","兔","龙","蛇","马","羊");     return $zodiac[$year%12];   }   /**   * 获取阳历月份的天数   * @param year 阳历-年   * @param month 阳历-月   */   function getSolarMonthDays($year,$month){     $monthHash=array("1"=>31,"2"=>$this->isLeapYear($year)?29:28,"3"=>31,"4"=>30,"5"=>31,"6"=>30,"7"=>31,"8"=>31,"9"=>30,"10"=>31,"11"=>30,"12"=>31);     return $monthHash["$month"];   }   /**   * 获取阴历月份的天数   * @param year 阴历-年   * @param month 阴历-月，从一月开始   */   function getLunarMonthDays($year,$month){     $monthData=$this->getLunarMonths($year);     return $monthData[$month-1];   }   /**   * 获取阴历每月的天数的数组   * @param year   */   function getLunarMonths($year){     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     $leapMonth=$yearData[0];     $bit=decbin($yearData[3]);     for ($i=0;$i<strlen($bit);$i ++){       $bitArray[$i]=substr($bit,$i,1);     }     for($k=0,$klen=16-count($bitArray);$k<$klen;$k++){       array_unshift($bitArray,"0");     }     $bitArray=array_slice($bitArray,0,($leapMonth==0?12:13));     for($i=0;$i<count($bitArray);$i++){       $bitArray[$i]=$bitArray[$i] + 29;     }     return $bitArray;   }   /**   * 获取农历每年的天数   * @param year 农历年份   */   function getLunarYearDays($year){     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     $monthArray=$this->getLunarYearMonths($year);     $len=count($monthArray);     return ($monthArray[$len-1]==0?$monthArray[$len-2]:$monthArray[$len-1]);   }   function getLunarYearMonths($year){//debugger;     $monthData=$this->getLunarMonths($year);     $res=array();     $temp=0;     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     $len=($yearData[0]==0?12:13);     for($i=0;$i<$len;$i++){       $temp=0;       for($j=0;$j<=$i;$j++){         $temp+=$monthData[$j];       }       array_push($res,$temp);     }     return $res;   }   /**   * 获取闰月   * @param year 阴历年份   */   function getLeapMonth($year){     $yearData=$this->lunarInfo[$year-$this->MIN_YEAR];     return $yearData[0];   }   /**   * 计算阴历日期与正月初一相隔的天数   * @param year   * @param month   * @param date   */   function getDaysBetweenLunar($year,$month,$date){     $yearMonth=$this->getLunarMonths($year);     $res=0;     for($i=1;$i<$month;$i++){       $res+=$yearMonth[$i-1];     }     $res+=$date-1;     return $res;   }   /**   * 计算2个阳历日期之间的天数   * @param year 阳历年   * @param cmonth   * @param cdate   * @param dmonth 阴历正月对应的阳历月份   * @param ddate 阴历初一对应的阳历天数   */   function getDaysBetweenSolar($year,$cmonth,$cdate,$dmonth,$ddate){     $a=mktime(0,0,0,$cmonth,$cdate,$year);     $b=mktime(0,0,0,$dmonth,$ddate,$year);     return ceil(($a-$b)/24/3600);   }   /**   * 根据距离正月初一的天数计算阴历日期   * @param year 阳历年   * @param between 天数   */   function getLunarByBetween($year,$between){//debugger;     $lunarArray=array();     $yearMonth=array();     $t=0;     $e=0;     $leapMonth=0;     $m="";     if($between==0){       array_push($lunarArray,$year,"正月","初一");       $t=1;       $e=1;     }else{       $year=$between>0? $year : ($year-1);       $yearMonth=$this->getLunarYearMonths($year);       $leapMonth=$this->getLeapMonth($year);       $between=$between>0?$between : ($this->getLunarYearDays($year)+$between);       for($i=0;$i<13;$i++){         if($between==$yearMonth[$i]){           $t=$i+2;           $e=1;           break;         }else if($between<$yearMonth[$i]){           $t=$i+1;           $e=$between-(empty($yearMonth[$i-1])?0:$yearMonth[$i-1])+1;           break;         }       }       $m=($leapMonth!=0&&$t==$leapMonth+1)?("闰".$this->getCapitalNum($t- 1,true)):$this->getCapitalNum(($leapMonth!=0&&$leapMonth+1<$t?($t-1):$t),true);       array_push($lunarArray,$year,$m,$this->getCapitalNum($e,false));     }     array_push($lunarArray,$this->getLunarYearName($year));// 天干地支     array_push($lunarArray,$t,$e);     array_push($lunarArray,$this->getYearZodiac($year));// 12生肖     array_push($lunarArray,$leapMonth);// 闰几月     return $lunarArray;   }   /**   * 获取数字的阴历叫法   * @param num 数字   * @param isMonth 是否是月份的数字   */   function getCapitalNum($num,$isMonth){     $isMonth=$isMonth||false;     $dateHash=array("0"=>"","1"=>"一","2"=>"二","3"=>"三","4"=>"四","5"=>"五","6"=>"六","7"=>"七","8"=>"八","9"=>"九","10"=>"十 ");     $monthHash=array("0"=>"","1"=>"正月","2"=>"二月","3"=>"三月","4"=>"四月","5"=>"五月","6"=>"六月","7"=>"七月","8"=>"八月","9"=>"九月","10"=>"十月","11"=>"冬月","12"=>"腊月");     $res="";     if($isMonth){       $res=$monthHash[$num];     }else{       if($num<=10){         $res="初".$dateHash[$num];       }else if($num>10&&$num<20){         $res="十".$dateHash[$num-10];       }else if($num==20){         $res="二十";       }else if($num>20&&$num<30){         $res="廿".$dateHash[$num-20];       }else if($num==30){         $res="三十";       }     }     return $res;   } } 

使用方法如下：

<?php header("Content-Type:text/html;charset=utf-8"); $lunar=new Lunar();$month=$lunar->convertSolarToLunar(2013,07,08);//将阳历转换为阴历 echo "<pre>"; print_r($month); 

打印结果如下：Array(    [0] => 2013    [1] => 五月    [2] => 三十    [3] => 癸巳    [4] => 5    [5] => 30    [6] => 蛇    [7] => 0)