分享一个实用的PHP日期时间操作类，里面包括了公历-农历转换、转换成中文日期格式、计算农历相隔天数、根据阴历年获取生肖、获取阴历月份的天数、获取农历每年的天数、获取闰月、计算阴历日期与正月初一相隔的天数、计算2个公历（阳历）日期之间的天数、根据距离正月初一的天数计算阴历日期、获取天干地支纪年等，PHP日期操作类：Lunar.class.php代码如下：

<?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)
    );
    /**
     * 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 $lunar_ary;
    }
    /**
     * 判断是否是闰年
     * @param year
     */
    function isLeapYear($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];
    }
    /**
    * 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, $day);
    }
    /**
     * 获取阳历月份的天数
     * @param year 阳历-年
     * @param month 阳历-月
     */
    function getSolarMonthDays($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);
   $my_year = $this->toYear($year);
            array_push($lunarArray,$my_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 $lunarArray;
    }
 //转换成中文年份
    function toYear($year){
  $arr = array("零","一","二","三","四","五","六","七","八","九");
  $year_arr = str_split($year);
  $str = $arr[$year_arr[0]].$arr[$year_arr[1]].$arr[$year_arr[2]].$arr[$year_arr[3]];
  return $str;
 }
    /**
     * 获取数字的阴历叫法
     * @param num 数字
     * @param isMonth 是否是月份的数字
     */
    function getCapitalNum($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;
    }
}
?>

请将上面的代码保存为：Lunar.class.php，下面的例子将会调用这个文件，告诉你使用方法。

<?php
require_once("Lunar.class.php");//先包含这个文件
$lunar = new Lunar();//生成对象
$date = $lunar->convertSolarToLunar(2014,2,12); //公历转农历
$date = $lunar->getYearZodiac(2014,2,12); //根据阴历年获取生肖
$date = $lunar->isLeapYear(2014,2,12); //判断闰年
//其它功能也是这种调用方法
print_r($date);
//如果是农历转公历，代码如下：
$date = $lunar->convertLunarToSolar(2014,2,12); //农历转公历
print_r($date);
?>