php 时隔日期工具类

php 时间日期工具类

1582), century not-divisible by 400 is not leap
		else if ($year > 1582 && $year % 100 == 0 )
			return false;
		return true;
	}

	/**
	 * Fix 2-digit years. Works for any century.
	 * Assumes that if 2-digit is more than 30 years in future, then previous century.
	 * @param integer $y year
	 * @return integer change two digit year into multiple digits
	 */
	protected static function digitCheck($y)
	{
		if ($y  50) {
				$c1 = $century + 1;
				$c0 = $century;
			} else {
				$c1 = $century;
				$c0 = $century - 1;
			}
			$c1 *= 100;
			// if 2-digit year is less than 30 years in future, set it to this century
			// otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
			if (($y + $c1)  23) || !$hs24 && ($h  12)) return false;
		if($m > 59 || $m  59 || $s = 0 && $timeArr [0] = 0 && $timeArr [1] = 0 && $timeArr [2] 
	public static function getWeekDay($date, $separator = "-") { //计算出给出的日期是星期几
		$dateArr = explode ($separator, $date);
		return date ( "w", mktime ( 0, 0, 0, $dateArr [1], $dateArr [2], $dateArr [0] ) );
	}
	
	public static function floorTime($seconds) { //让日期显示为:XX天XX年以前 
		$times = '';
		$days = floor ( ($seconds / 86400) % 30 );
		$hours = floor ( ($seconds / 3600) % 24 );
		$minutes = floor ( ($seconds / 60) % 60 );
		$seconds = floor ( $seconds % 60 );
		if ($seconds >= 1)
			$times .= $seconds . '秒';
		if ($minutes >= 1)
			$times = $minutes . '分钟 ' . $times;
		if ($hours >= 1)
			$times = $hours . '小时 ' . $times;
		if ($days >= 1)
			$times = $days . '天';
		if ($days > 30)
			return false;
		$times .= '前';
		return str_replace ( " ", '', $times );
	}
	
	public static function transDateToChs($date) {
		if (empty ( $date ))
			return '今日';
		$y = date ( 'Y', strtotime ( $date ) );
		$m = date ( 'm', strtotime ( $date ) );
		$d = date ( 'd', strtotime ( $date ) );
		return $y . '年' . $m . '月' . $d . '日';
	}
	
	// 08/31/2004 => 2004-08-31
	public static function TransDateUI($datestr, $type = 'Y-m-d') {
		if ($datestr == Null)
			return Null;
		$target = $datestr;
		$arr_date = preg_split ( "/\//", $target );
		$monthstr = $arr_date [0];
		$daystr = $arr_date [1];
		$yearstr = $arr_date [2];
		$result = date ( $type, mktime ( 0, 0, 0, $monthstr, $daystr, $yearstr ) );
		return $result;
	}
	
	// 12/20/2004 10:55 AM => 2004-12-20 10:55:00
	public static function TransDateTimeUI($datestr, $type = 'Y-m-d H:i:s') {
		if ($datestr == Null)
			return Null;
		$target = $datestr;
		$arr_date = preg_split ( "/\/|\s|:/", $target );
		$monthstr = $arr_date [0];
		$daystr = $arr_date [1];
		$yearstr = $arr_date [2];
		$hourstr = $arr_date [3];
		$minutesstr = $arr_date [4];
		$result = date ( $type, mktime ( $hourstr, $minutesstr, 0, $monthstr, $daystr, $yearstr ) );
		return $result;
	}
	
	// 2004-08-31 => 08/31/2004
	public static function TransDateDB($datestr, $type = 'm/d/Y') {
		if ($datestr == Null)
			return Null;
		if ($datestr == '0000-00-00')
			return Null;
		$target = $datestr;
		$arr_date = preg_split ( "/-/", $target );
		$monthstr = $arr_date [1];
		$daystr = $arr_date [2];
		$yearstr = $arr_date [0];
		$result = date ( $type, mktime ( 0, 0, 0, $monthstr, $daystr, $yearstr ) );
		return $result;
	}
	
	// 2004-08-31 10:55:00 => 12/20/2004 10:55 AM 
	public static function TransDateTimeDB($datestr, $type = 'm/d/Y h:i A') {
		if ($datestr == Null)
			return Null;
		$target = $datestr;
		$arr_date = preg_split ( "/-|\s|:/", $target );
		$monthstr = $arr_date [1];
		$daystr = $arr_date [2];
		$yearstr = $arr_date [0];
		$hourstr = $arr_date [3];
		$minutesstr = $arr_date [4];
		$secondstr = $arr_date [5];
		$result = date ( $type, mktime ( $hourstr, $minutesstr, $secondstr, $monthstr, $daystr, $yearstr ) );
		return $result;
	}
}
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