NineStarKi

nine_star_ki.php

<?php
class NineStarKi
{
	protected static $_names = array(
		1 => '一白水星',
		2 => '二黒土星',
		3 => '三碧木星',
		4 => '四緑木星',
		5 => '五黄土星',
		6 => '六白金星',
		7 => '七赤金星',
		8 => '八白土星',
		9 => '九紫火星'
	);

	protected static $_monthStartDay = array(
		1 => 5,
		2 => 4,
		3 => 6,
		4 => 5,
		5 => 6,
		6 => 6,
		7 => 7,
		8 => 7,
		9 => 8,
		10 => 8,
		11 => 7,
		12 => 7
	);

	protected static $_numberTable = array(
		0 => array(
			1 => 9,
			2 => 2,
			3 => 1,
			4 => 9,
			5 => 8,
			6 => 7,
			7 => 6,
			8 => 5,
			9 => 4,
			10 => 3,
			11 => 2,
			12 => 1
		),
		1 => array(
			1 => 6,
			2 => 8,
			3 => 7,
			4 => 6,
			5 => 5,
			6 => 4,
			7 => 3,
			8 => 2,
			9 => 1,
			10 => 9,
			11 => 8,
			12 => 7
		),
		2 => array(
			1 => 3,
			2 => 5,
			3 => 4,
			4 => 3,
			5 => 2,
			6 => 1,
			7 => 9,
			8 => 8,
			9 => 7,
			10 => 6,
			11 => 5,
			12 => 4
		),
	);

	public static function yearly($year, $month, $day)
	{
		if (!in_array($month, range(1, 12)) || !in_array($day, range(1, 31))) {
			return false;
		}

		if ($month <= 2 && $day <= 3) {
			$year = (int)$year - 1;
		}

		if ($year < 1) {
			return false;
		}

		$sum = $year;

		do {
			$sum = array_sum(str_split((int)$sum));
		} while ($sum >= 10);

		if ($sum == 1) {
			$sum = 10;
		}

		$num = 11 - $sum;

		return self::$_names[$num];
	}

	public static function monthly($year, $month, $day)
	{
		if (!in_array($month, range(1, 12)) || !in_array($day, range(1, 31))) {
			return false;
		}

		$eto = ((int)$year + 9) % 12;

		if ($eto == 0) {
			$eto = 12;
		}

		if (self::$_monthStartDay[$month] > $day) {
			$month = $month == 1 ? 12 : $month - 1;
		}

		$etoGroup = $eto % 3;
		$num = self::$_numberTable[$etoGroup][$month];

		return self::$_names[$num];
	}
}