PHP获取今日农历日期

接上一篇，如何获取今日农历日期

原理：农历不像阳历，可以直接date()函数获取到，期间有闰月，每个农历月有30天的，也有29天的，加上阳历并不是严格意义上的每四年一个366天，所以，计算规则就是从1900年1月1日的时间戳为0的时候，到现在，一天一天的计算，把对应规则输入进去，每天每天的算

下面有各种各样的算法，节气，节日，时辰，阴历各种函数，需要的，从这个类里面去调用即可。

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; $ilunarInfo[$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'=>'十一月','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 $res;
  }
  /*
   * 节气通用算法
   */
  function getJieQi($_year,$month,$day)
  {
    $year = substr($_year,-2)+0;
    $coefficient = array(
      array(5.4055,2019,-1),//小寒
      array(20.12,2082,1),//大寒
      array(3.87),//立春
      array(18.74,2026,-1),//雨水
      array(5.63),//惊蛰
      array(20.646,2084,1),//春分
      array(4.81),//清明
      array(20.1),//谷雨
      array(5.52,1911,1),//立夏
      array(21.04,2008,1),//小满
      array(5.678,1902,1),//芒种
      array(21.37,1928,1),//夏至
      array(7.108,2016,1),//小暑
      array(22.83,1922,1),//大暑
      array(7.5,2002,1),//立秋
      array(23.13),//处暑
      array(7.646,1927,1),//白露
      array(23.042,1942,1),//秋分
      array(8.318),//寒露
      array(23.438,2089,1),//霜降
      array(7.438,2089,1),//立冬
      array(22.36,1978,1),//小雪
      array(7.18,1954,1),//大雪
      array(21.94,2021,-1)//冬至
    );
    $term_name = array(
    "小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨",
    "立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑",
    "白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至");
    $idx1 = ($month-1)*2;
    $_leap_value = floor(($year-1)/4);
    $day1 = floor($year*0.2422+$coefficient[$idx1][0])-$_leap_value;
    if(isset($coefficient[$idx1][1])&&$coefficient[$idx1][1]==$_year) $day1 += $coefficient[$idx1][2];
    $day2 = floor($year*0.2422+$coefficient[$idx1+1][0])-$_leap_value;
    if(isset($coefficient[$idx1+1][1])&&$coefficient[$idx1+1][1]==$_year) $day1 += $coefficient[$idx1+1][2];
    //echo __FILE__.'->'.__LINE__.' $day1='.$day1,',$day2='.$day2.'
'.chr(10);
    $data=array();
    if($day<$day1){
      $data['name1']=$term_name[$idx1-1];
      $data['name2']=$term_name[$idx1-1].'后';
    }else if($day==$day1){
      $data['name1']=$term_name[$idx1];
      $data['name2']=$term_name[$idx1];
    }else if($day>$day1 && $day<$day2){
      $data['name1']=$term_name[$idx1];
      $data['name2']=$term_name[$idx1].'后';
    }else if($day==$day2){
      $data['name1']=$term_name[$idx1+1];
      $data['name2']=$term_name[$idx1+1];
    }else if($day>$day2){
      $data['name1']=$term_name[$idx1+1];
      $data['name2']=$term_name[$idx1+1].'后';
    }
    return $data;
  }
  /*
   * 获取节日：特殊的节日只能修改此函数来计算
   */
  function getFestival($today, $nl_info = false,$config = 1)
  {
    if($config == 1)
    {
      $arr_lunar=array('01-01'=>'春节','01-15'=>'元宵节','02-02'=>'二月二','05-05'=>'端午节','07-07'=>'七夕节','08-15'=>'中秋节','09-09'=>'重阳节','12-08'=>'腊八节','12-23'=>'小年');
      $arr_solar=array('01-01'=>'元旦','02-14'=>'情人节','03-12'=>'植树节','04-01'=>'愚人节','05-01'=>'劳动节','06-01'=>'儿童节','10-01'=>'国庆节','10-31'=>'万圣节','12-24'=>'平安夜','12-25'=>'圣诞节');
    }//需要不同节日的，用不同的$config,然后配置$arr_lunar和$arr_solar
    $festivals = array();
    list($y,$m,$d) = explode('-',$today);
    if(!$nl_info) $nl_info = $this->convertSolarToLunar($y,intval($m),intval($d));
    if($nl_info[7]>0&&$nl_info[7]<$nl_info[4]) $nl_info[4]-=1;
    $md_lunar = substr('0'.$nl_info[4],-2).'-'.substr('0'.$nl_info[5],-2);
    $md_solar=substr_replace($today,'',0,5);
    isset($arr_lunar[$md_lunar])?array_push($festivals, $arr_lunar[$md_lunar]):'';
    isset($arr_solar[$md_solar])?array_push($festivals, $arr_solar[$md_solar]):'';
    $glweek = date("w",strtotime($today));  //0-6
    if($m==5&&($d>7)&&($d<15)&&($glweek==0))array_push($festivals, "母亲节");
    if($m==6&&($d>14)&&($d<22)&&($glweek==0))array_push($festivals,"父亲节");
    $jieqi = $this->getJieQi($y,$m,$d);
    if($jieqi)array_push($festivals,$jieqi);
    return implode('/',$festivals);
  }
   /*
   * 获取当前时间属于哪个时辰
   @param int $time 时间戳
   */
  function getTheHour($h){
    $d=$h;
    if($d==23 || $d==0){
      return '子时';
    }else if($d==1 || $d==2){
      return '丑时';
    }else if($d==3 || $d==4){
      return '寅时';
    }else if($d==5 || $d==6){
      return '卯时';
    }else if($d==7 || $d==8){
      return '辰时';
    }else if($d==9 || $d==10){
      return '巳时';
    }else if($d==11 || $d==12){
      return '午时';
    }else if($d==13 || $d==14){
      return '未时';
    }else if($d==15 || $d==16){
      return '申时';
    }else if($d==17 || $d==18){
      return '酉时';
    }else if($d==19 || $d==20){
      return '戌时';
    }else if($d==21 || $d==22){
      return '亥时';
    }
  }
  
  
  public function index()
  {
    //示例代码：
    //$lunar=new Date();
    $today=$this->convertSolarToLunar(date('Y'),date('m'),date('d'));
    echo "今天是公元".date('Y')."年".date('m')."月".date('d')."日
";
    echo "今天是农历".$today[0]."年".$today[1]."".$today[2]."农历".$today[3]."年".$today[4]."月".$today[5]."日".$today[6]."年
";
    $month=$this->getJieQi(date('Y'),date('m'),date('d'));//获取当前节气
    echo "今天节气：".$month['name2']; 
  }
  
  public function returnDate()
  {
      $today=$this->convertSolarToLunar(date('Y'),date('m'),date('d'));
      return $today;
  }
}

?>