PHP时间工具种

<?phpclass DateUtils {	function checkDate($date) { //检查日期是否合法日期		$dateArr = explode ( "-", $date );		if (is_numeric ( $dateArr [0] ) && is_numeric ( $dateArr [1] ) && is_numeric ( $dateArr [2] )) {			return checkdate ( $dateArr [1], $dateArr [2], $dateArr [0] );		}		return false;	}		function checkTime($time) { //检查时间是否合法时间  		$timeArr = explode ( ":", $time );		if (is_numeric ( $timeArr [0] ) && is_numeric ( $timeArr [1] ) && is_numeric ( $timeArr [2] )) {			if (($timeArr [0] >= 0 && $timeArr [0] <= 23) && ($timeArr [1] >= 0 && $timeArr [1] <= 59) && ($timeArr [2] >= 0 && $timeArr [2] <= 59))				return true;			else				return false;		}		return false;	}		function addDate($date, $int, $unit = "d") { //时间的增加（还可以改进成时分秒都可以增加，有时间再补上）		$dateArr = explode ( "-", $date );		$value [$unit] = $int;		return date ( "Y-m-d", mktime ( 0, 0, 0, $dateArr [1] + $value ['m'], $dateArr [2] + $value ['d'], $dateArr [0] + $value ['y'] ) );		}		function addDay($ntime, $aday) { //取当前时间后几天，天数增加单位为1		$dayst = 3600 * 24;		$oktime = $ntime + ($aday * $dayst);		return $oktime;	}		function dateDiff($date1, $date2, $unit = "") { //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天  		switch ($unit) {			case 's' :				$dividend = 1;				break;			case 'i' :				$dividend = 60;				break;			case 'h' :				$dividend = 3600;				break;			case 'd' :				$dividend = 86400;				break;			default :				$dividend = 86400;		}		$time1 = strtotime ( $date1 );		$time2 = strtotime ( $date2 );		if ($time1 && $time2)			return ( float ) ($time1 - $time2) / $dividend;		return false;	}		function getWeekDay($date) { //计算出给出的日期是星期几		$dateArr = explode ( "-", $date );		return date ( "w", mktime ( 0, 0, 0, $dateArr [1], $dateArr [2], $dateArr [0] ) );	}		function getDateTimeMk($mktime) { //取当前时间，格式为2009-10-23 14:20:35		return MyDate ( 'Y-m-d H:i:s', $mktime );	}		function getDateMk($mktime) { //取当前时间，格式为2009-10-23		if ($mktime == "0")			return "暂无";		else			return MyDate ( "Y-m-d", $mktime );	}		function getMkTime($dtime) { //把时间格式转化为Linux时间戳		global $cfg_cli_time;		if (! ereg ( "[^0-9]", $dtime )) {			return $dtime;		}		$dtime = trim ( $dtime );		$dt = Array (1970, 1, 1, 0, 0, 0 );		$dtime = ereg_replace ( "[\r\n\t]|日|秒", " ", $dtime );		$dtime = str_replace ( "年", "-", $dtime );		$dtime = str_replace ( "月", "-", $dtime );		$dtime = str_replace ( "时", ":", $dtime );		$dtime = str_replace ( "分", ":", $dtime );		$dtime = trim ( ereg_replace ( "[ ]{1,}", " ", $dtime ) );		$ds = explode ( " ", $dtime );		$ymd = explode ( "-", $ds [0] );		if (! isset ( $ymd [1] )) {			$ymd = explode ( ".", $ds [0] );		}		if (isset ( $ymd [0] )) {			$dt [0] = $ymd [0];		}		if (isset ( $ymd [1] )) {			$dt [1] = $ymd [1];		}		if (isset ( $ymd [2] )) {			$dt [2] = $ymd [2];		}		if (strlen ( $dt [0] ) == 2) {			$dt [0] = '20' . $dt [0];		}		if (isset ( $ds [1] )) {			$hms = explode ( ":", $ds [1] );			if (isset ( $hms [0] )) {				$dt [3] = $hms [0];			}			if (isset ( $hms [1] )) {				$dt [4] = $hms [1];			}			if (isset ( $hms [2] )) {				$dt [5] = $hms [2];			}		}		foreach ( $dt as $k => $v ) {			$v = ereg_replace ( "^0{1,}", '', trim ( $v ) );			if ($v == '') {				$dt [$k] = 0;			}		}		$mt = @gmmktime ( $dt [3], $dt [4], $dt [5], $dt [1], $dt [2], $dt [0] ) - 3600 * $cfg_cli_time;		if (! empty ( $mt )) {			return $mt;		} else {			return time ();		}	}		function MyDate($format = 'Y-m-d H:i:s', $timest = 0) { //返回格林威治标准时间		//global $cfg_cli_time='+8';		global $cfg_cli_time;		$addtime = $cfg_cli_time * 3600;		if (empty ( $format )) {			$format = 'Y-m-d H:i:s';		}		return gmdate ( $format, $timest + $addtime );	}		function floorTime($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 ( " ", '', $times );	}		function transDateToChs($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' . $d . '日';	}		// 08/31/2004 => 2004-08-31	function TransDateUI($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 $result;	}		// 12/20/2004 10:55 AM => 2004-12-20 10:55:00	function TransDateTimeUI($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 $result;	}		// 2004-08-31 => 08/31/2004	function TransDateDB($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 $result;	}		// 2004-08-31 10:55:00 => 12/20/2004 10:55 AM 	function TransDateTimeDB($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;	}}?>