<?php
/**
* 功能：php时间与日期工具类
* 编辑：www.jb200.com
*/
DateTimeUtils::addDate('2013-12-01',1,'y');
DateTimeUtils::getWeekDay('2013/10/01','/');
DateTimeUtils::isLeapYear('2013');
DateTimeUtils::timeFromNow(strtotime("2013-10-26 14:15:13"));
class DateTimeUtils {
/**
* Checks for leap year, returns true if it is. No 2-digit year check. Also
* handles julian calendar correctly.
* @param integer $year year to check
* @return boolean true if is leap year
*/
public static function isLeapYear($year)
{
$year = self::digitCheck($year);
if ($year % 4 != 0)
return false;
if ($year % 400 == 0)
return true;
// if gregorian calendar (>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 < 100){
$yr = (integer) date("Y");
$century = (integer) ($yr /100);
if ($yr%100 > 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) < $yr+30) $y = $y + $c1;
else $y = $y + $c0*100;
}
return $y;
}
/**
* Returns 4-digit representation of the year.
* @param integer $y year
* @return integer 4-digit representation of the year
*/
public static function get4DigitYear($y)
{
return self::digitCheck($y);
}
/**
* Checks to see if the year, month, day are valid combination.
* @param integer $y year
* @param integer $m month
* @param integer $d day
* @return boolean true if valid date, semantic check only.
*/
public static function isValidDate($y,$m,$d)
{
return checkdate($m, $d, $y);
}
public static function checkDate($date, $separator = "-") { //检查日期是否合法日期
$dateArr = explode ($separator, $date);
return self::isValidDate ($dateArr[0], $dateArr[1], $dateArr[2]);
}
/**
* Checks to see if the hour, minute and second are valid.
* @param integer $h hour
* @param integer $m minute
* @param integer $s second
* @param boolean $hs24 whether the hours should be 0 through 23 (default) or 1 through 12.
* @return boolean true if valid date, semantic check only.
* @since 1.0.5
*/
public static function isValidTime($h,$m,$s,$hs24=true)
{
if($hs24 && ($h < 0 || $h > 23) || !$hs24 && ($h < 1 || $h > 12)) return false;
if($m > 59 || $m < 0) return false;
if($s > 59 || $s < 0) return false;
return true;
}
public static function checkTime($time, $separator = ":") { //检查时间是否合法时间
$timeArr = explode($separator, $time);
return self::isValidTime($timeArr[0], $timeArr[1],$timeArr[2]);
}
public static function addDate($date, $int, $unit = "d") { //日期的增加
$value = array('y'=>'', 'm'=>'', 'd'=>'');
$dateArr = explode ( "-", $date);
if(array_key_exists($unit, $value)){
$value[$unit] = $int;
}else{
return false;
}
return date ("Y-m-d", mktime (0, 0, 0, $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] +$value['y']));
}
public static function addDateTime($date, $int, $unit = "d") { //日期的增加
$value = array('y'=>'', 'm'=>'', 'd'=>'', 'h'=>'', 'i'=>'');
$dateArr = preg_split ( "/-|s|:/", $date);
if(array_key_exists($unit, $value)){
$value[$unit] = $int;
}else{
return false;
}
return date ("Y-m-d H:i:s", mktime($dateArr[3]+ $value['h'], $dateArr[4]+ $value['i'], $dateArr[5], $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] + $value['y']));
}
public static function addDayTimestamp($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 $oktime;
}
public static function
datediff($begin, $end, $unit = "d") { //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
$diff = strtotime($end) - strtotime($begin);
switch($unit)
{
case "y": $retval = bcdiv($diff, (60 * 60 * 24 * 365));
break;
case "m": $retval = bcdiv($diff, (60 * 60 * 24 * 30)); break;
case "w": $retval = bcdiv($diff, (60 * 60 * 24 * 7)); break;
case "d": $retval = bcdiv($diff, (60 * 60 * 24)); break;
case "h": $retval = bcdiv($diff, (60 * 60)); break;
case "i": $retval = bcdiv($diff, 60); break;
case "s": $retval = $diff; break;
}
return $retval;
}
public static function getWeekDay($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], $dateArr[0]));
}
public static function timeFromNow($dateline) { //让日期显示为:XX天XX年以前
if(empty($dateline)) return false;
$seconds = time() - $dateline;
if($seconds < 60){
return "1分钟前";
}elseif($seconds < 3600){
return floor($seconds/60)."分钟前";
}elseif($seconds < 24*3600){
return floor($seconds/3600)."小时前";
}elseif($seconds < 48*3600){
return date("昨天 H:i", $dateline)."";
}else{
return date('Y-m-d', $dateline);
}
}
public static function transDateToChs($date) {
if (empty ($date)) return '今日';
date_default_timezone_set('PRC');
$dates = date ('Y年m月d日', strtotime ($date));
return $dates;
}
// 08/31/2004 => 2004-08-31
public static function TransDateUI($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;
}
}
?>
