最近剛好做要依日期做for迴圈
就試著寫寫看
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<?php
for ($now_date = $first_day; $now_date <= $last_day; $now_date = date('Y-m-d', strtotime("$now_date +1 DAY"))){
...
}
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寫完覺得寫出還滿實用的東西
Google爬一下有什麼解法
瞬間覺得我的code是垃圾orz
Stack Overflow寫法
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<?php
$begin = new DateTime('2010-05-01');
$end = new DateTime('2010-05-10');
$interval = DateInterval::createFromDateString('1 day');
$period = new DatePeriod($begin, $interval, $end);
foreach ($period as $dt) {
echo $dt->format("l Y-m-d H:i:s\n");
}
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I have 2 dates in PHP, how can I run a foreach loop to go through all of those days? - Stack Overflow
官網範例
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<?php
$begin = new DateTime( '2012-08-01' );
$end = new DateTime( '2012-08-31' );
$end = $end->modify( '+1 day' );
$interval = new DateInterval('P1D');
$daterange = new DatePeriod($begin, $interval ,$end);
foreach($daterange as $date){
echo $date->format("Ymd") . "<br>";
}
?>
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感覺實務上還是竟量用DateTime()物件
modify竟然也有做時間加總運算
DatePeriod可以做到日期跑一遍
真的很方便
DateInterval
PHP: DateInterval - Manual
DateInterval可以做時間之間運算
使用DateTime裡面的add/sub
最神的還能用在diff
算兩個之間差
詳細可以再看看PHP: DateTime - Manual裡面
裡面爬到DateInterval沒有負的時間
裡面神人有寫
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<?php
class DateRange extends ArrayIterator
{
protected $oDate = null;
protected $oStartDate = null;
protected $oEndDate = null;
protected $oInterval = null;
public function __construct( DateTime $oStartDate, DateTime $oEndDate, DateInterval $oInterval = null )
{
$this->oStartDate = $oStartDate;
$this->oDate = clone $oStartDate;
$this->oEndDate = $oEndDate;
$this->oInterval = $oInterval;
}
public function next()
{
$this->oDate->add($this->oInterval);
return $this->oDate;
}
public function current()
{
return $this->oDate;
}
public function valid()
{
if ($this->oStartDate > $this->oEndDate)
{
return $this->oDate >= $this->oEndDate;
}
return $this->oDate <= $this->oEndDate;
}
}
$oRange = new DateRange(new DateTime("2013-10-01"), new DateTime("2013-01-01"), DateInterval::createFromDateString("-1 month") );
foreach ($oRange as $oDate)
{
echo $oDate->format("Y-m-d") . "<br />";
}
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DatePeriod
PHP: DatePeriod - Manual裡面的Traversable
可以用foreach，不過php裡面沒寫interface function讓我有點疑惑???
感覺有很多東西可以寫，先筆記紀錄
參考來源: