<?php
DateTimeUtils::addDate('2012-12-01', 1, 'y');
DateTimeUtils::getWeekDay('2012/10/01', '/');
DateTimeUtils::isLeapYear('2012');
DateTimeUtils::timeFromNow(strtotime("2012-10-26 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;
} 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.