PHP Lunar Calendar Gregorian Calendar Conversion

PHP Lunar Calendar Gregorian Calendar Conversion

/*
 Written by Yang Haixi, School of Computer Science and Engineering, Qujing Normal University, Yunnan Province
 2009-9-3
*/
class Lunar
{
 private $_SMDay = array(1 => 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);//Define the number of days in the Gregorian calendar month
 private $_LStart = 1950;//The lunar calendar starts in 1950
 private $_LMDay = array(
 //Difference: the number of days from the first day of the first lunar month of the year to January 1 of the Gregorian calendar; 1~12: the number of days in the lunar month; leap: if there is a leap month, record the number of ordinary days in the month
 //Difference 1 2 3 4 5 6 7 8 9 10 11 12 leap
 array(47,29,30,30,29,30,30,29,29,30,29,30,29),
 array(36,30, 29,30,30,29,30,29,30,29,30,29,30),
array(6,29,30,29,30,59,29,30,30,29,30,29, 30,29), //May 29 Leap May 30
 array(44,29,30,29,29,30,30,29,30,30,29,30,29),
 array(33,30 ,29,30,29,29,30,29,30,30,29,30,30),
 array(23,29,30,59,29,29,30,29,30,29,30,30 ,30,29), //March 29 Leap March 30
 array(42,29,30,29,30,29,29,30,29,30,29,30,30),
 array(30, 30,29,30,29,30,29,29,59,30,29,30,29,30), //August 30 Leap August 29
 array(48,30,30,30,29,30 ,29,29,30,29,30,29,30),
 array(38,29,30,30,29,30,29,30,29,30,29,30,29),
 array(27 ,30,29,30,29,30,59,30,29,30,29,30,29,30), //June 30 Leap June 29
 array(45,30,29,30,29, 30,29,30,30,29,30,29,30),
 array(35,29,30,29,29,30,29,30,30,29,30,30,29),
 array( 24,30,29,30,58,30,29,30,29,30,30,30,29,29), //April 29 Leap April 29
 array(43,30,29,30,29 ,29,30,29,30,29,30,30,30),
 array(32,29,30,29,30,29,29,30,29,29,30,30,29),
 array (20,30,30,59,30,29,29,30,29,29,30,30,29,30), //March 30 Leap March 29
 array(39,30,30,29, 30,30,29,29,30,29,30,29,30),
array(29,29,30,29,30,30,29,59,30,29,30,29,30,30) , //July 30 Leap July 29
 array(47,29,30,29,30,29,30,30,29,30,29,30,29),
 array(36,30,29,29 ,30,29,30,30,29,30,30,29,30),
 array(26,29,30,29,29,59,30,29,30,30,30,29,30,30 ), //May 30 Leap May 29
 array(45,29,30,29,29,30,29,30,29,30,30,29,30),
 array(33,30,29, 30,29,29,30,29,29,30,30,29,30),
 array(22,30,30,29,59,29,30,29,29,30,30,29,30, 30), //April 30 Leap April 29
 array(41,30,30,29,30,29,29,30,29,29,30,29,30),
 array(30,30,30 ,29,30,29,30,29,59,29,30,29,30,30), //August 30 Leap August 29
 array(48,30,29,30,30,29,30, 29,30,29,30,29,29),
 array(37,30,29,30,30,29,30,30,29,30,29,30,29),
 array(27,30, 29,29,30,29,60,29,30,30,29,30,29,30), //June 30 Leap June 30
 array(46,30,29,29,30,29,30 ,29,30,30,29,30,30),
 array(35,29,30,29,29,30,29,29,30,30,29,30,30),
 array(24,30 ,29,30,58,30,29,29,30,29,30,30,30,29), //April 29 Leap April 29
 array(43,30,29,30,29,29, 30,29,29,30,29,30,30),
array(32,30,29,30,30,29,29,30,29,29,59,30,30,30), //ten Month 30 Leap October 29
 array(50,29,30,30,29,30,29,30,29,29,30,29,30),
 array(39,29,30,30,29,30 ,30,29,30,29,30,29,29),
 array(28,30,29,30,29,30,59,30,30,29,30,29,29,30), // June 30 Leap June 29
 array(47,30,29,30,29,30,29,30,30,29,30,30,29),
 array(36,30,29,29,30, 29,30,29,30,29,30,30,30),
array(26,29,30,29,29,59,29,30,29,30,30,30,30,30), / /May 30 Leap May 29
 array(45,29,30,29,29,30,29,29,30,29,30,30,30),
 array(34,29,30,30,29 ,29,30,29,29,30,29,30,30),
 array(22,29,30,59,30,29,30,29,29,30,29,30,29,30), //March 30 Leap March 29
 array(40,30,30,30,29,30,29,30,29,29,30,29,30),
 array(30,29,30,30, 29,30,29,30,59,29,30,29,30,30), //August 30 Leap August 29
 array(49,29,30,29,30,30,29,30,29 ,30,30,29,29),
 array(37,30,29,30,29,30,29,30,30,29,30,30,29),
 array(27,30,29,29 ,30,58,30,30,29,30,30,29,30,29), //May 29 Leap May 29
 array(46,30,29,29,30,29,29,30, 29,30,30,30,29),
 array(35,30,30,29,29,30,29,29,30,29,30,30,29),
 array(23,30,30, 29,59,30,29,29,30,29,30,29,30,30), //April 30 Leap April 29
 array(42,30,30,29,30,29,30,29 ,29,30,29,30,29),
 array(31,30,30,29,30,30,29,30,29,29,30,29,30),
 array(21,29,59 ,30,30,29,30,29,30,29,30,29,30,30), //February 30 Leap February 29
 array(39,29,30,29,30,29,30, 30,29,30,29,30,29),
array(28,30,29,30,29,30,29,59,30,30,29,30,30,30), //July 30 Leap July 29
 array(48,29,29,30,29,29,30,29,30,30,30,29,30),
 array(37,30,29,29,30,29,29 ,30,29,30,30,29,30),
array(25,30,30,29,29,59,29,30,29,30,29,30,30,30), //May 30 Leap May 29
 array(44,30,29,30,29,30,29,29,30,29,30,29,30),
 array(33,30,29,30,30,29, 30,29,29,30,29,30,29),
array(22,30,29,30,59,30,29,30,29,30,29,30,29,30), //four Month 30 Leap April 29
 array(40,30,29,30,29,30,30,29,30,29,30,29,30),
 array(30,29,30,29,30,29 ,30,29,30,59,30,29,30,30), //September 30 Leap September 29
array(49,29,30,29,29,30,29,30,30,30,29,30,29),
 array(38,30,29,30,29,29,30,29,30, 30,29,30,30),
array(27,29,30,29,30,29,59,29,30,29,30,30,30,29), //June 29 Leap June 30
 array(46,29,30,29,30,29,29,30,29,30,29,30,30),
 array(35,30,29,30,29,30,29,29,30 ,29,29,30,30),
array(24,29,30,30,59,30,29,29,30,29,30,29,30,30), //April 30 Leap April 29
array(42,29,30,30,29,30,29,30,29,30,29,30,29),
array(31,30,29,30,29,30,30,29, 30,29,30,29,30),
array(21,29,59,29,30,30,29,30,30,29,30,29,30,30), //February 30 leap day Month 29
 array(40,29,30,29,29,30,29,30,30,29,30,30,29),
 array(28,30,29,30,29,29,59,30 ,29,30,30,30,29,30), //June 30 Leap June 29
 array(47,30,29,30,29,29,30,29,29,30,30,30, 29),
 array(36,30,30,29,30,29,29,30,29,29,30,30,29),
 array(25,30,30,30,29,59,29, 30,29,29,30,30,29,30), //May 30 Leap May 29
 array(43,30,30,29,30,29,30,29,30,29,29,30 ,30),
 array(33,29,30,29,30,30,29,30,29,30,29,30,29),
 array(22,29,30,59,30,29,30 ,30,29,30,29,30,29,30), //March 30 Leap March 29
array(41,30,29,29,30,29,30,30,29,30,30, 29,30),
 array(30,29,30,29,29,30,29,30,29,30,30,59,30,30), //November 30 Leap November 29
 array (49,29,30,29,29,30,29,30,29,30,30,29,30),
 array(38,30,29,30,29,29,30,29,29,30 ,30,29,30),
 array(27,30,30,29,30,29,59,29,29,30,29,30,30,29), //June 29 Leap June 30
 array(45,30,30,29,30,29,29,30,29,29,30,29,30),
 array(34,30,30,29,30,29,30,29,30, 29,29,30,29),
array(23,30,30,29,30,59,30,29,30,29,30,29,29,30), //May 30 Leap May 29
 array(42,30,29,30,30,29,30,29,30,30,29,30,29),
 array(31,29,30,29,30,29,30,30,29 ,30,30,29,30),
array(21,29,59,29,30,29,30,29,30,30,29,30,30,30), //February 30 Leap February 29
array(40,29,30,29,29,30,29,29,30,30,29,30,30),
array(29,30,29,30,29,29,30,58, 30,29,30,30,30,29), //July 29 Leap July 29
 array(47,30,29,30,29,29,30,29,29,30,29,30,30 ),
 array(36,30,29,30,29,30,29,30,29,29,30,29,30),
 array(25,30,29,30,30,59,29,30 ,29,29,30,29,30,29), //May 29 Leap May 30
 array(44,29,30,30,29,30,30,29,30,29,29,30, 29),
 array(32,30,29,30,29,30,30,29,30,30,29,30,29),
 array(22,29,30,59,29,30,29, 30,30,29,30,30,29,29), //March 29 Leap March 30
 );
 //Whether it is a leap year
 private function IsLeapYear($AYear){
 return ($AYear % 4 == 0) && (($AYear % 100 != 0) || ($AYear % 400 == 0));
 }
 //The number of days in the month in the Gregorian calendar (year: year; month: month)
 private function GetSMon( $year,$month)
 {
 if($this->IsLeapYear($year) && $month == 2)
 return 29;
 else
 return $this->_SMDay[$month];
 }
 //Lunar calendar name conversion
 private function LYearName($year)
 {
 $Name = array("zero","one","two","three","four","five","six"," seven","eight","nine");
 for($i=0;$i<4;$i++)
 for($k=0;$k<10;$k++)
 if($year[ $i]==$k)
 $tmp.=$Name[$k];
 return $tmp;
 }

 private function LMonName($month)
 {
 if($month >=1 && $month <=12 )
 {
 $Name = array( 1=>"正","二","三","四","五","六","七","八"," nine","ten","eleven","twelve");
 return $Name[$month];
 }
 return $month;
 }

 private function LDayName($day)
 {
 if( $day >=1 && $day <=30 )
 {
 $Name = array( 1 =>
 "First day of junior high school", "Second day of junior high school", "Third day of junior high school", "Fourth day of junior high school", "Fifth day of junior high school" ","The sixth day of the lunar month","The seventh day of the lunar month","The eighth day of the lunar month","The ninth day of the lunar month","The tenth day of the lunar month",
"Eleventh","Twelve","Thirteenth","Fourteenth","Tenth "Five", "Sixteen", "Seventeen", "Eighteen", "Nineteen", "Twenty",
 "Twenty-one", "Twenty-two", "Twenty-three", "Twenty-four", " "Twenty-five", "Twenty-six", "Twenty-seven", "Twenty-eight", "Twenty-nine", "Thirty"
 );
 return $Name[$day];
 }
 return $day;
 }

 //Convert Gregorian calendar to lunar calendar (Sdate: Gregorian calendar date)
 public function S2L($date)
 {
 list($year, $month, $day) = explode("-", $date);
 if($ year <= 1951 || $month <= 0 || $day <= 0 || $year >= 2051 ) return false;
 //Get the number of days from the query date to January 1st of the current year
 $date1 = strtotime($year."-01-01");//January 1 of the current year
 $date2 = strtotime($year."-".$month."-".$day);
 $days=round (($date2-$date1)/3600/24);
 $days += 1;
 //Get the corresponding annual lunar calendar data and turn it into an array Larray
 $Larray = $this->_LMDay[$year - $this- >_LStart];
 if($days <= $Larray[0])
 {
 $Lyear = $year - 1;
 $days = $Larray[0] - $days;
 $Larray = $this- >_LMDay[$Lyear - $this->_LStart];
 if($days < $Larray[12])
 {
 $Lmonth = 12;
 $Lday = $Larray[12] - $days;
 }
 else
 {
 $Lmonth = 11;
 $days = $days - $Larray[12];
 $Lday = $Larray[11] - $days;
 }
 }
 else
 {
 $Lyear = $ year;
 $days = $days - $Larray[0];
 for($i = 1;$i <= 12;$i++)
 {
 if($days > $Larray[$i]) $ days = $days - $Larray[$i];
 else
 {
 if ($days > 30){
 $days = $days - $Larray[13];
 $Ltype = 1;
 }

 $ Lmonth = $i;
 $Lday = $days;
 break;
 }
 }
 }
 return mktime(0, 0, 0, $Lmonth, $Lday, $Lyear);
 //$Ldate = $Lyear. "-".$Lmonth."-".$Lday;
 //$Ldate = $this->LYearName($Lyear)."Year".$this->LMonName($Lmonth)."Month". $this->LDayName($Lday);
 //if($Ltype) $Ldate.="(Leap)";
 //return $Ldate;
 }
 //Convert lunar calendar to Gregorian calendar (date: lunar calendar date; type: whether it is a leap month)
 public function L2S($date,$type = 0)
 {
 list($year, $month, $day) = split("-",$date);
 if($year < = 1951 || $month <= 0 || $day <= 0 || $year >= 2051 ) return false;
 $Larray = $this->_LMDay[$year - $this->_LStart ];
 if($type == 1 && count($Larray)<=12 ) return false;//Request to query leap month, but no leap month is found
 //If the lunar calendar being queried is a leap month and the lunar calendar array of the year contains a leap month Get the data
 if($Larray[$month]>30 && $type == 1 && count($Larray) >=13) $day = $Larray[13] + $day;
 //Get the year The number of days from the lunar date to January 1 of the Gregorian calendar
 $days = $day;
 for($i=0;$i<=$month-1;$i++)
 $days += $Larray[$i];
 //When querying the lunar date is more than one year from January 1 of the Gregorian calendar
 if($days > 366 || ($this->GetSMon($month,2)!=29 && $days>365 ))
 {
 $Syear = $year +1;
 if($this->GetSMon($month,2)!=29)
 $days-=366;
 else
 $days-=365;
 if($days > $this->_SMDay[1])
 {
 $Smonth = 2;
 $Sday = $days - $this->_SMDay[1];
 }
 else
 {
 $Smonth = 1;
 $Sday = $days;
 }
 }
 else
 {
 $Syear =$year;
 for($i=1;$i<=12;$i++)
 {
 if($days > $this- >GetSMon($Syear,$i))
 $days-=$this->GetSMon($Syear,$i);
 else
 {
 $Smonth = $i;
 $Sday = $days;
 break ;
 }
 }
 }
 return mktime(0, 0, 0, $Smonth, $Sday, $Syear);
 //$Sdate = $Syear."-".$Smonth."-".$Sday;
 //return $Sdate;
 }
}
?>

 require_once 'Lunar.php';
 $today = date("Y-m-d");
 $lunar = new Lunar();
 //Gregorian calendar to lunar calendar
 $nl = date("Y-m-d ",$lunar->S2L($today));
 //Convert lunar calendar to Gregorian calendar
 $gl = date("Y-m-d",$lunar->L2S($nl));
 echo "Today's Gregorian calendar is:$ today";
 echo "The conversion to the lunar calendar is: $nl";
 echo "The conversion to the Gregorian calendar is: $gl";
?>