PHP开发人员肯定不认为这是错误。但是在strtotime
的文档中,很少有评论可以解决您的问题(寻找2月28日的示例;)),即扩展了DateTime类:
<?php
// this will give us 2010-02-28 ()
echo PHPDateTime::DateNextMonth(strftime('%F', strtotime("2010-01-31 00:00:00")), 31);
?>
类 PHPDateTime:
<?php
/**
* IA FrameWork
* @package: Classes & Object Oriented Programming
* @subpackage: Date & Time Manipulation
* @author: ItsAsh <ash at itsash dot co dot uk>
*/
final class PHPDateTime extends DateTime {
// Public Methods
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Calculate time difference between two dates
* ...
*/
public static function TimeDifference($date1, $date2)
$date1 = is_int($date1) ? $date1 : strtotime($date1);
$date2 = is_int($date2) ? $date2 : strtotime($date2);
if (($date1 !== false) && ($date2 !== false)) {
if ($date2 >= $date1) {
$diff = ($date2 - $date1);
if ($days = intval((floor($diff / 86400))))
$diff %= 86400;
if ($hours = intval((floor($diff / 3600))))
$diff %= 3600;
if ($minutes = intval((floor($diff / 60))))
$diff %= 60;
return array($days, $hours, $minutes, intval($diff));
}
}
return false;
}
/**
* Formatted time difference between two dates
*
* ...
*/
public static function StringTimeDifference($date1, $date2) {
$i = array();
list($d, $h, $m, $s) = (array) self::TimeDifference($date1, $date2);
if ($d > 0)
$i[] = sprintf('%d Days', $d);
if ($h > 0)
$i[] = sprintf('%d Hours', $h);
if (($d == 0) && ($m > 0))
$i[] = sprintf('%d Minutes', $m);
if (($h == 0) && ($s > 0))
$i[] = sprintf('%d Seconds', $s);
return count($i) ? implode(' ', $i) : 'Just Now';
}
/**
* Calculate the date next month
*
* ...
*/
public static function DateNextMonth($now, $date = 0) {
$mdate = array(0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
list($y, $m, $d) = explode('-', (is_int($now) ? strftime('%F', $now) : $now));
if ($date)
$d = $date;
if (++$m == 2)
$d = (($y % 4) === 0) ? (($d <= 29) ? $d : 29) : (($d <= 28) ? $d : 28);
else
$d = ($d <= $mdate[$m]) ? $d : $mdate[$m];
return strftime('%F', mktime(0, 0, 0, $m, $d, $y));
}
}
?>