DateConvert.class.php

<?php

class DateConvert{
	/**
	* ============================================================
	* 原理：
	* 公历1900.1.31 = 农历1900.1.1
	* 1900.1.1 = 正月初一 庚子年 丁丑月 甲辰日
	* 
	* 下面这个十六进制包含了农历信息，但是这个十六进制不是真正的十六进制
	* 而是十六进制组合，具体如下：
	* 0x04bd8 ==> 0x0 0x4 0xb 0xd 0x8 ==> 0 4 11 13 8 ==> 0000 0100 1011 1101 1000
	* 原数据  ==> 十六进制            ==> 十进制      ==> 二进制
	* 
	* 前4位，在这一年是润年时才有意义，它代表这年润月的大小月，1表示润大月30天，0表示润小月29天
	* 中间12位，每位代表一个月，为1则为大月30天，为0则为小月29天 
	* 最后4位，即8，代表这一年的润月月份，为0则不润。首4位要与末4位搭配使用
	* 
	* 要求出每月是大月还是小月只要对其进行与运算即可
	* 0000 0100 1011 1101 1000  &  0000 1000 0000 0000 0000 结果为1则一月为大月,同 0x04bd8 & 0x08000
	* 0000 0100 1011 1101 1000  &  0000 0100 0000 0000 0000 结果为1则二月为大月,同 0x04bd8 & 0x08000>>1
	* 可循环求出每月天数
	* for ($i = 0x08000; $i >= 0x00010; $i >>= 1){
	* 	echo $lunarInfomation[0] & $i ? 30 : 29;
	* }
	* ============================================================
	* 
	* 求闰月方法：
	* echo base_convert('11110000000000000000', 2,16);	// f0000 ==> 0xf0000
	* echo base_convert('1111', 2,16);	// 0xf
	* 
	* 0xf0000	求闰月大小,大月30天，小月29天
	* 0xf		求闰月月份,没有闰月为0
	* 0x08000 >> 0x00010	求每月天数,0为29天,大于0为30天
	* ============================================================
	*/
	protected $lunarInfomation = array(
		0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,//1900-1909
		0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,//1910-1919
		0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,//1920-1929
		0x06566,0x0d4a0,0x0ea50,0x16a95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,//1930-1939
		0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,//1940-1949
		0x06ca0,0x0b550,0x15355,0x04da0,0x0a5b0,0x14573,0x052b0,0x0a9a8,0x0e950,0x06aa0,//1950-1959
		0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,//1960-1969
		0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b6a0,0x195a6,//1970-1979
		0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,//1980-1989
		0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x05ac0,0x0ab60,0x096d5,0x092e0,//1990-1999
		0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,//2000-2009
		0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,//2010-2019
		0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,//2020-2029
		0x05aa0,0x076a3,0x096d0,0x04afb,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,//2030-2039
		0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0,//2040-2049
		0x14b63,0x09370,0x049f8,0x04970,0x064b0,0x168a6,0x0ea50,0x06aa0,0x1a6c4,0x0aae0,//2050-2059
		0x092e0,0x0d2e3,0x0c960,0x0d557,0x0d4a0,0x0da50,0x05d55,0x056a0,0x0a6d0,0x055d4,//2060-2069
		0x052d0,0x0a9b8,0x0a950,0x0b4a0,0x0b6a6,0x0ad50,0x055a0,0x0aba4,0x0a5b0,0x052b0,//2070-2079
		0x0b273,0x06930,0x07337,0x06aa0,0x0ad50,0x14b55,0x04b60,0x0a570,0x054e4,0x0d160,//2080-2089
		0x0e968,0x0d520,0x0daa0,0x16aa6,0x056d0,0x04ae0,0x0a9d4,0x0a2d0,0x0d150,0x0f252,//2090-2099
	);
	
	protected $yearSum = array(
		1900=>384,1901=>354,1902=>355,1903=>383,1904=>354,1905=>355,1906=>384,1907=>354,1908=>355,1909=>384,
		1910=>354,1911=>384,1912=>354,1913=>354,1914=>384,1915=>354,1916=>355,1917=>384,1918=>355,1919=>384,
		1920=>354,1921=>354,1922=>384,1923=>354,1924=>354,1925=>385,1926=>354,1927=>355,1928=>384,1929=>354,
		1930=>383,1931=>354,1932=>355,1933=>384,1934=>355,1935=>354,1936=>384,1937=>354,1938=>384,1939=>354,
		1940=>354,1941=>384,1942=>355,1943=>354,1944=>385,1945=>354,1946=>354,1947=>384,1948=>354,1949=>384,
		1950=>354,1951=>355,1952=>384,1953=>354,1954=>355,1955=>384,1956=>354,1957=>383,1958=>355,1959=>354,
		1960=>384,1961=>355,1962=>354,1963=>384,1964=>355,1965=>353,1966=>384,1967=>355,1968=>384,1969=>354,
		1970=>355,1971=>384,1972=>354,1973=>354,1974=>384,1975=>354,1976=>384,1977=>354,1978=>355,1979=>384,
		1980=>355,1981=>354,1982=>384,1983=>354,1984=>384,1985=>354,1986=>354,1987=>384,1988=>355,1989=>355,
		1990=>384,1991=>354,1992=>354,1993=>383,1994=>355,1995=>384,1996=>354,1997=>355,1998=>384,1999=>354,
		2000=>354,2001=>384,2002=>354,2003=>355,2004=>384,2005=>354,2006=>385,2007=>354,2008=>354,2009=>384,
		2010=>354,2011=>354,2012=>384,2013=>355,2014=>384,2015=>354,2016=>355,2017=>384,2018=>354,2019=>354,
		2020=>384,2021=>354,2022=>355,2023=>384,2024=>354,2025=>384,2026=>354,2027=>354,2028=>384,2029=>355,
		2030=>354,2031=>384,2032=>355,2033=>384,2034=>354,2035=>354,2036=>384,2037=>354,2038=>354,2039=>384,
		2040=>355,2041=>355,2042=>384,2043=>354,2044=>384,2045=>354,2046=>354,2047=>384,2048=>354,2049=>355,
		2050=>384,2051=>355,2052=>384,2053=>354,2054=>354,2055=>383,2056=>355,2057=>354,2058=>384,2059=>355,
		2060=>354,2061=>384,2062=>354,2063=>384,2064=>354,2065=>355,2066=>384,2067=>354,2068=>355,2069=>384,
		2070=>354,2071=>384,2072=>354,2073=>354,2074=>384,2075=>355,2076=>354,2077=>384,2078=>355,2079=>354,
		2080=>384,2081=>354,2082=>384,2083=>354,2084=>355,2085=>384,2086=>354,2087=>355,2088=>383,2089=>354,
		2090=>384,2091=>354,2092=>355,2093=>384,2094=>355,2095=>354,2096=>384,2097=>354,2098=>354,2099=>384,
	);
	
	
	/**
	* 公历转换为农历
	* @param int $year	年
	* @param int $month	月
	* @param int $day	日
	* @return array('year'=>, 'month'=>, 'day'=>, 'leapMonth'=>)
	*/
	function convertSolarToLunar($year, $month, $day)
	{
		$timestamp = -2206425600;	// 1900-1-31 时间戳
		$date = new DateTime("$year-$month-$day");
		$days = 1 + ceil(($date->format('U') - $timestamp) / 86400);	// 农历和公历相差的天数
		
		$sum = 0;	// 农历天数之和
		$count = count($this->yearSum) + 1900;
		for ($lunarYear = 1900; $lunarYear < $count; $lunarYear++){
			$sum += $this->yearSum[$lunarYear];
			if($sum >= $days){
				break;
			}
		}
		$olddays = $this->yearSum[$lunarYear] - ($sum - $days);
		
		$hex = $this->lunarInfomation[$lunarYear - 1900];
		$sumMonth = 0;
		$leapMonth = $hex & 0xf;
		$isleap = false;
		for ($i = 0x08000, $month = 1; $i >= 0x00010; $i >>= 1, $month++){
			$sumMonth += ($hex & $i) ? 30 : 29 ;
			if($sumMonth >= $olddays){
				break;
			}
			if($leapMonth == $month){
				$sumMonth += $hex & 0xf0000 ? 30 : 29;
				$isleap = true;
				if($sumMonth >= $olddays){
					break;
				}
			}
		}
		if($leapMonth == $month && $isleap){
			$currentMonthDays = $hex & 0xf0000 ? 30 : 29;
		}else{
			$currentMonthDays = $hex & (0x08000 >> $month-1) ? 30 : 29;
			$leapMonth = '';
		}
		$day =  $currentMonthDays - ($sumMonth - $olddays);
		return array('year'=>$lunarYear, 'month'=>$month, 'day'=>$day, 'leapMonth'=>$leapMonth);
	}
	
	
	/**
	* 农历转阳历
	* @param 
	*/
	public function convertLunarToSolar($year, $month, $day, $leap = false)
	{
		$sum = 0;
		for ($i = 1900; $i < $year; $i++){
			$sum += $this->yearSum[$i];
		}
		// 加上最后一年
		$hex = $this->lunarInfomation[$year - 1900];
		$leapMonth = $hex & 0xf;
		for ($i = 0x08000, $lunarMonth = 1; $i >= 0x00010; $i >>= 1, $lunarMonth++){
			if($month == $lunarMonth){
				break;
			}
			$sum += $hex & $i ? 30 : 29;
			if($leapMonth == $lunarMonth){
				$sum += $hex & 0xf0000 ? 30 : 29;
			}
		}
		if($month == $leapMonth && $leap){
			$sum += $hex & (0x08000 >> $lunarMonth - 1) ? 30 : 29;
		}
		$sum = $sum + $day;	// 这个和是农历天数的总和
		
		$count = count($this->yearSum) + 1900;
		$solarSum = -30;	// 从1900-1-31 开始计数
		for ($solarYear = 1900; $solarYear < $count; $solarYear++){
			$solarSum += $this->getSolarYearDays($solarYear);
			if($solarSum >= $sum){
				break;
			}
		}
		$sumMonth = $this->getSolarYearDays($solarYear) - ($solarSum - $sum);
		$tempSum = 0;
		for ($i = 0, $solarMonth = 1; $i < 12; $i++, $solarMonth++){
			$tempSum += $this->getSolarMonthDays($solarYear, $solarMonth);
			if($tempSum >= $sumMonth){
				break;
			}
		}
		$lastMonth = $this->getSolarMonthDays($solarYear, $solarMonth);
		$day = $lastMonth - ($tempSum - $sumMonth);
		return array('year'=>$solarYear, 'month'=>$solarMonth, 'day'=>$day);
	}
	
	
	/**
	* 获取农历某年全年天数
	* @param 
	*/
	public function getYearDays($year){
		$hex = $this->lunarInfomation[$year - 1900];
		$sum = 0;
		for ($i = 0x08000; $i >= 0x00010; $i >>= 1){
			$sum += $hex & $i ? 30 : 29;
		}
		if($hex & 0xf){
			$sum += $hex & 0xf0000 ? 30 : 29;
		}
		return $sum;
	}
	
	
	/**
	* 获取某个农历日期到1900年的所有天数
	* @param 
	*/
	public function getLunarTotalDays($year, $month, $day, $leap = false)
	{
		$sum = 0;
		for ($i = 1900; $i < $year; $i++){
			$sum += $this->yearSum[$i];
		}
		// 加上最后一年
		$hex = $this->lunarInfomation[$year - 1900];
		$leapMonth = $hex & 0xf;
		for ($i = 0x08000, $lunarMonth = 1; $i >= 0x00010; $i >>= 1, $lunarMonth++){
			if($month == $lunarMonth){
				break;
			}
			$sum += $hex & $i ? 30 : 29;
			if($leapMonth == $lunarMonth){
				$sum += $hex & 0xf0000 ? 30 : 29;
			}
		}
		if($month == $leapMonth && $leap){
			$sum += $hex & (0x08000 >> $lunarMonth - 1) ? 30 : 29;
		}
		return $sum + $day;	// 这个和是农历天数的总和
	}
	
	
	/**
	* 获取流日天干地支的索引值,从0开始
	* @param 
	*/
	public function getDayGanZhiIndex($year, $month, $day, $leap = false)
	{
		$days = 43041; // 甲子日天数和
		$differ = $this->getLunarTotalDays($year, $month, $day, $leap) - $days;
		$index = $differ % 60;
		if($index < 0){
			$index += 60;
		}
		return $index;
	}
	
	
	/**
	* 获取农历某月天数
	* @param int $year		年
	* @param int $month		月
	* @param int $leapMonth	闰月
	* @return int 天数
	*/
	public function getLunarMonthDays($year, $month, $leapMonth = false){
		$hex = $this->lunarInfomation[$year - 1900];
		if($leapMonth){
			if($hex & 0xf){
				return $hex & 0xf0000 ? 30 : 29;
			}else{
				return 0;
			}
		}else{
			return ($hex & (0x08000 >> $month-1)) ? 30 : 29;
		}
	}
	
	
	/**
	* 获取农历某年闰月的月份,为零的时候没有闰月
	* @param 
	*/
	public function getLunarLeapMonth($year){
		return $this->lunarInfomation[$year - 1900] & 0xf;
	}
	
	
	/**
	* 某年闰月天数
	* @param 
	*/
	public function getLunarLeapMonthDays($year){
		$hex = $this->lunarInfomation[$year - 1900];
		if($hex & 0xf){
			return $hex & 0xf0000 ? 30 : 29;
		}
		return false;
	}
	
	
	/**
	* 获取某个阳历全年天数
	* @param 
	*/
	public function getSolarYearDays($year){
		if(($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0){
			return 366;
		}else{
			return 365;
		}
	}
	
	
	/**
	* 获取某个阳历某月天数
	* @param 
	*/
	public function getSolarMonthDays($year, $month){
		$days = (($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0) ? 29 : 28;
		$monthDays = array('1'=>31,'2'=>$days,'3'=>31,'4'=>30,'5'=>31,'6'=>30,'7'=>31,'8'=>31,'9'=>30,'10'=>31,'11'=>30,'12'=>31);
		return $monthDays[$month];
	}
	
	
	/**
	* 判断某年是否是闰年
	* @param 
	*/
	public function isLeapYear($year){
		return ($year % 4 == 0 && $year % 100 != 0) || $year % 400 == 0;
	}
	
	
	/**
	* 获取某年闰月月份
	* @param 
	*/
	public function getLeapMonth($year){
		return $this->lunarInfomation[$year - 1900] & 0xf;
	}
	
}