PHP method to realize conversion between solar and lunar calendar_php skills

Recently I am interested in the algorithm of converting the solar calendar to the lunar calendar to get the corresponding festivals, so I searched around on the Internet. Not bad, I found a relatively good php class, which implements the algorithm for converting the solar calendar to the lunar calendar (lunar calendar), and the lunar calendar to the solar calendar. At the same time, it can also obtain the zodiac signs, zodiac animals, and the corresponding Chinese names of the lunar calendar, etc. The functions are quite complete, so I would like to share them with you here.
The specific class code is as follows:

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)&#63;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,($leapMonth==0&#63;12:13)); 
    for($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&#63;$monthArray[$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&#63;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&#63; $year : ($year-1); 
      $yearMonth=$this->getLunarYearMonths($year); 
      $leapMonth=$this->getLeapMonth($year); 
      $between=$between>0&#63;$between : ($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])&#63;0:$yearMonth[$i-1])+1; 
          break; 
        } 
      } 
      $m=($leapMonth!=0&&$t==$leapMonth+1)&#63;('闰'.$this->getCapitalNum($t- 1,true)):$this->getCapitalNum(($leapMonth!=0&&$leapMonth+1<$t&#63;($t-1):$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; 
  } 
} 

How to use is as follows:

<&#63;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 class="brush:php;toolbar:false">'; 
print_r($month); 

The printing results are as follows:
Array
(
[0] => 2013
[1] => May
[2] => Thirty
[3] => Guisi
[4] => 5
[5] => 30
[6] => Snake
[7] => 0
)