Learn the method code of using PHP to realize the conversion of Gregorian calendar and lunar calendar

Encapsulate calendar conversion class

Class file ：lunar.class.php

<?php

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)
    );

    /** *  Convert the Gregorian calendar to the lunar calendar  * @param year  Gregorian calendar - year  * @param month  Gregorian calendar - month  * @param date  Gregorian calendar - Japan  */
    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, ' In the first month ', ' The new moon ', ' Xin Mao ', 1, 1, ' rabbit ');
        }
        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, ' In the first month ', ' The new moon ', ' Xin Mao ', 1, 1, ' rabbit ');
        }
        $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;
    }

    /** *  Convert the lunar calendar to the Gregorian calendar  * @param year  Lunar calendar - year  * @param month  Lunar calendar - month , Leap month processing ： For example, if it's leap may , Then the second may will be June , Equivalent to the lunar calendar has 13 Months , Only sometimes 13 The number of days in a month is 0 * @param date  Lunar calendar - Japan  */
    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);
    }

    /** *  Determine if it's a leap year  * @param year */
    function isLeapYear($year)
    {
    
        return (($year % 4 == 0 && $year % 100 != 0) || ($year % 400 == 0));
    }

    /** *  Get the annals of the branches and branches  * @param year */
    function getLunarYearName($year)
    {
    
        $sky = array(' Geng ', ' simba ', ' Ren ', ' Dec. ', ' nail ', ' B ', ' C ', ' Ding ', ' E ', ' Oneself ');
        $earth = array(' Shen ', ' Unitary ', ' Xu ', ' Hai ', ' Son ', ' ugly ', ' Yin ', ' Mao ', ' Chen" ', ' Already ', ' Noon ', ' not ');
        $year = $year . '';
        return $sky[$year{
    3}] . $earth[$year % 12];
    }

    /** *  Get the zodiac according to the lunar year  * @param year  lunar year  */
    function getYearZodiac($year)
    {
    
        $zodiac = array(' Monkey ', ' chicken ', ' Dog ', ' The pig ', ' rat ', ' cattle ', ' The tiger ', ' rabbit ', ' dragon ', ' The snake ', ' Horse ', ' sheep ');
        return $zodiac[$year % 12];
    }

    /** *  Get the number of days in the Gregorian month  * @param year  The solar calendar - year  * @param month  The solar calendar - month  */
    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"];
    }

    /** *  Get the number of days in the lunar month  * @param year  Lunar calendar - year  * @param month  Lunar calendar - month , From January on  */
    function getLunarMonthDays($year, $month)
    {
    
        $monthData = $this->getLunarMonths($year);
        return $monthData[$month - 1];
    }

    /** *  Get the array of days of each month in the lunar calendar  * @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;
    }

    /** *  Get the number of days per year in the lunar calendar  * @param year  Lunar year  */
    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;
    }

    /** *  Get leap month  * @param year  Lunar year  */
    function getLeapMonth($year)
    {
    
        $yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
        return $yearData[0];
    }

    /** *  Calculate the number of days between the lunar date and the first day of the first month  * @param year http://www.codetc.com/ * @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;
    }

    /** *  Calculation 2 Number of days between Gregorian calendar dates  * @param year  solar year  * @param cmonth * @param cdate * @param dmonth  The month of the Gregorian calendar corresponding to the first month of the lunar calendar  * @param ddate  The number of days in the Gregorian calendar corresponding to the first day of the lunar calendar  */
    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);
    }

    /** *  Calculate the lunar calendar date according to the number of days from the first day of the first month  * @param year  solar year  * @param between  Days  */
    function getLunarByBetween($year, $between)
    {
    //debugger;
        $lunarArray = array();
        $yearMonth = array();
        $t = 0;
        $e = 0;
        $leapMonth = 0;
        $m = '';
        if ($between == 0) {
    
            array_push($lunarArray, $year, ' In the first month ', ' The new moon ');
            $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) ? (' Leap ' . $this->getCapitalNum($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));//  Heaven and earth 
        array_push($lunarArray, $t, $e);
        array_push($lunarArray, $this->getYearZodiac($year));// 12 the Chinese zodiac 
        array_push($lunarArray, $leapMonth);//  Leap month 
        return $lunarArray;
    }

    /** *  The name of the lunar calendar for getting numbers  * @param num  Numbers  * @param isMonth  Is it the number of months  */
    function getCapitalNum($num, $isMonth)
    {
    
        $isMonth = $isMonth || false;
        $dateHash = array('0' => '', '1' => ' One ', '2' => ' Two ', '3' => ' 3、 ... and ', '4' => ' Four ', '5' => ' 5、 ... and ', '6' => ' 6、 ... and ', '7' => ' 7、 ... and ', '8' => ' 8、 ... and ', '9' => ' Nine ', '10' => ' Ten  ');
        $monthHash = array('0' => '', '1' => ' In the first month ', '2' => ' February ', '3' => ' March ', '4' => ' April ', '5' => ' May ', '6' => ' June ', '7' => ' July ', '8' => ' August ', '9' => ' September ', '10' => ' October ', '11' => ' Winter moon ', '12' => ' December ');
        $res = '';
        if ($isMonth) {
    
            $res = $monthHash[$num];
        } else {
    
            if ($num <= 10) {
    
                $res = ' first ' . $dateHash[$num];
            } else if ($num > 10 && $num < 20) {
    
                $res = ' Ten ' . $dateHash[$num - 10];
            } else if ($num == 20) {
    
                $res = " twenty ";
            } else if ($num > 20 && $num < 30) {
    
                $res = " Twenty " . $dateHash[$num - 20];
            } else if ($num == 30) {
    
                $res = " thirty ";
            }
        }
        return $res;
    }
}

?>

Reference classes

New file lunardate.php

<?php
header("Content-Type:text/html;charset=utf-8");
require "lunar.class.php";
echo ' Current date is ' . $day = '2022-06-28';
echo '<br>';
$lunar = new Lunar();
$month = $lunar->convertSolarToLunar(2022, 06, 28);// Convert the Gregorian calendar to the lunar calendar 
echo '<pre>';
print_r($month);
?>

Print out

Current date is 2022-06-28

Array
(
    [0] => 2022
    [1] =>  May 
    [2] =>  thirty 
    [3] =>  Ren Yin 
    [4] => 5
    [5] => 30
    [6] =>  The tiger 
    [7] => 0
)