php公历转农历的方法：

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具体实现步骤：

convertSolarToLunar(2013,07,08);//将阳历转换为农历 
echo '
'; 
print_r($month);
完整代码如下：
lunarInfo[$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;
    }
}
header("Content-Type:text/html;charset=utf-8");
$lunar = new Lunar();
$month = $lunar->convertSolarToLunar('2017', '03', '09');//将阳历转换为阴历
echo '
';
print_r($month);
打印结果如下：
            

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