我有这样的代码：
private function validatePeriodArrayYear()
{
$this->time->setTimestamp( self::$data['to'] );
$year1 = $this->time->format('Y');
$this->time->setTimestamp( self::$data['from'] );
$year2 = $this->time->format('Y');
$overlap = $year1 - $year2;
if( $overlap > 0 ){
$end = clone $this->time;
$end->setTimestamp( self::$data['to'] );
$overlap++;
$interval = new DateInterval('P1Y');
$period = new DatePeriod( $this->time, $interval, $end );
var_dump($period);
$iteration = -1;
foreach( $period as $onePeriod ){
var_dump($onePeriod);
$iteration++;
if( $iteration > 0 ){
$onePeriod->setDate( $onePeriod->format('Y'), 1, 1 );
}
$from = $onePeriod->getTimestamp();
$onePeriod->setDate( $onePeriod->format('Y'), 12, 31 );
$onePeriod->setTime( 23, 59, 59 );
self::$data['zone'][$iteration] = array( 'from' => $from, 'to' => $onePeriod->getTimestamp() );
}
self::$data['zone'][$iteration]['to'] = self::$data['to'];
} else {
self::$data['zone'][] = array( 'from' => self::$data['from'], 'to' => self::$data['to'] );
}
}
$this->time = new DateTime(),
self::$data['from'] = 1354316400,
self::$data['to'] = 1389653999
var_dump（）输出函数如下：
<pre>
object(DatePeriod)[337]
public start =>
object(DateTime)[336]
public date => string 2012-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
public current => null
public end =>
object(DateTime)[48]
public date => string 2014-01-13 23:59:59 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
public interval =>
object(DateInterval)[331]
public y => int 1
public m => int 0
public d => int 0
public h => int 0
public i => int 0
public s => int 0
public weekday => int 0
public weekday_behavior => int 0
public first_last_day_of => int 0
public invert => int 0
public days => boolean false
public special_type => int 0
public special_amount => int 0
public have_weekday_relative => int 0
public have_special_relative => int 0
public recurrences => int 1
public include_start_date => boolean true
object(DateTime)[326]
public date => string 2012-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
object(DateTime)[47]
public date => string 2013-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
执行代码后存储在变量self::$data['zone']中是这样的：
array (size=2)
0 =>
array (size=2)
from => int 1354316400
to => int 1356994799
1 =>
array (size=2)
from => int 1356994800
to => int 1389653999
转换为日期：
01.12.2012 - 31.12.2012
01.01.2013 - 13.01.2014
现在，请纠正我，如果它不会产生这个，在这种情况下错误在哪里：
01.12.2012 - 31.12.2012
2013年1月1日 - 2013年12月31日
01.01.2014 - 13.01.2014
$ php -v
PHP 5.5.6-1+debphp.org~raring+2 (cli) (built: Nov 21 2013 14:39:09)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2013 Zend Technologies
with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies
with Xdebug v2.2.3, Copyright (c) 2002-2013, by Derick Rethans
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 13.10
Release: 13.10
Codename: saucy
$ uname -a
Linux userName-K55VJ 3.11.0-15-generic #23-Ubuntu SMP Mon Dec 9 18:17:04 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
感谢您的回答。
@Glavić：感谢您提供的信息，现在我完全理解了
让我感到震惊的是，如果开始和结束年份相同，并且我在那一年只改变了几个月或几天，它有时会带来正确的结果，有时会缺少去年。
让我进一步解决这个问题。
为了澄清，我将使用不同的输入变量来更好地理解。
self::$data['from'] = 1354316400 //1.12.2012 00:00:00
self::$data['to'] = 1417388400 //1.12.2014 00:00:00
请注意，self::$data['to']只缺少一秒，差异超过3年。
$start = new DateTime()->setTimestamp( self::$data['from'] );
$end = new DateTime()->setTimestamp( self::$data['to'] );
$interval = new DateInterval('P1Y');
$period = new DatePeriod( $start, $interval, $end );
foreach( $period as $onePeriod ){
var_dump($onePeriod);
}
object(DateTime)
public date => string 2012-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
object(DateTime)
public date => string 2013-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
在这种情况下，在DatePeriod类中创建了三个日期：
2012-12-01 00:00:00
2013-12-01 00:00:00
2014-12-01 00:00:00
但是删除了最后一个日期，因此类只返回两个DateTime个对象。
现在我们向变量self::$data['to']添加第二个并再次运行代码。
self::$data['from'] = 1354316400 //1.12.2012 00:00:00
self::$data['to'] = 1417388401 //1.12.2014 00:00:01
object(DateTime)
public date => string 2012-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
object(DateTime)
public date => string 2013-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
object(DateTime)
public date => string 2014-12-01 00:00:00 (length=19)
public timezone_type => int 3
public timezone => string Europe/Prague (length=13)
在这种情况下，在DatePeriod类中创建了四个日期：
2012-12-01 00:00:00
2013-12-01 00:00:00
2014-12-01 00:00:00
2014-12-01 00:00:01
上次日期再次被删除。
a =开始日期
b =结束日期
初始化 x 等于 a
然后每个时期的创建
x = x +期间（在我的情况下，P1Y属于{365,366}）
答案 0 :(得分：0)
如果我理解正确，你想要做什么，那么这将对你有所帮助：
$from = new DateTime('@1354316400');
$to = new DateTime('@1389653999');
$zones = [];
for ($Y = $from->format('Y'); $Y <= $to->format('Y'); $Y++) {
$_from = clone $from;
if ($Y != $from->format('Y')) {
$_from->setDate($Y, 1, 1);
}
$_to = clone $to;
if ($Y != $to->format('Y')) {
$_to->setDate($Y, 12, 31);
}
$zones[] = [
'from' => $_from->format('Y-m-d'),
'to' => $_to->format('Y-m-d'),
];
}
print_r($zones);