通过PHP循环遍历日期

Question

我试图通过PHP来循环日期。目前我的代码被卡在循环110307中。我需要日期格式在yymmdd中。以下是我尝试使用：

<?php 
    $check_date = '100227'; 
    $end_date = '100324'; 

    while($check_date != $end_date){ 
     $check_date = date("ymd", strtotime("+1 day", strtotime($check_date))); 
     echo $check_date . '<br>'; 
    } 
?> 

Answer 1

strtotime解释 “100227” 作为时间10时02分27秒的今天，不是2010-02-27。所以在第一步之后，$check_date（今天）是“110307”。在随后的所有步骤中，“110307”再次被解释为今天的时间，将$check_date再次解释为“110307”。

用于重复日期的绝招是利用mktime的正常化日期的能力，这样的事情：

$date_arr = array(27,2,2010); 
$end_date = "100324"; 
do { 
    $check_date = gmdate('ymd', gmmktime(0,0,0,$date_arr[1],$date_arr[0]++,$date_arr[2])); 
    echo $check_date."\n"; 
} while($end_date!=$check_date); 

Answer 2

下面是我用的是代码的一部分，或许可以得到改善，取决于你使用的PHP版本。

//usage 
$Iterator=class Dates_DateIterator::factory('Daily', 
              new Datetime('20100227'), 
              new Datetime('20100324')); 

foreach($Iterator as $i=>$day){ 
    var_dump($i); 
    var_dump($day); 
} 


//code lib 
abstract class Dates_DateIterator implements Iterator 
{ 
    /** 
    * Factory method, saves some code, also enable me to put everything in the same class 
    * as we use Autoload to load classes. 
    */ 
    static public function factory($cycle,DateTime $DateI,DateTime $DateII){ 
     switch($cycle){ 
      case 'Daily': 
       return new DaysIterator($DateI,$DateII); 
      case 'Weekly': 
       return new WeeksIterator($DateI,$DateII); 
      case 'Monthly': 
       return new MonthsIterator($DateI,$DateII); 
      case 'Yearly': 
       return new YearsIterator($DateI,$DateII); 
      default: 
       throw(new Exception('No valid cycle was chosen to iterate over')); 
     } 
    } 
    /** 
    * @var DateTime represents the start range. 
    */ 
    public $FromDate; 
    /** 
    * @var DateTime represents the end range. 
    */ 
    public $ToDate; 
    /** 
    * @var DateTime Current Date. 
    */ 
    protected $CurrentDate; 

    public function __construct(DateTime $DateI,DateTime $DateII) 
    { 
     if($DateII->format('U') > $DateI->format('U')) 
     { 
      $this->FromDate=$DateI; 
      $this->ToDate=$DateII; 
      $this->CurrentDate=$DateI; 
     } 
     else 
     { 
      $this->FromDate=$DateII; 
      $this->ToDate=$DateI; 
      $this->CurrentDate=$DateII; 
     } 
    }//EOF constructor 

    /** 
    * @return DateTime 
    */ 
    public function getClonedCurrent(){ 
     return clone($this->CurrentDate); 
    } 

    public function current() 
    { 
     return $this->CurrentDate; 
    }//EOF current 

    public function currentDate() 
    { 
     return $this->CurrentDate->format('Ymd'); 
    }//EOF current 

    public function rewind() 
    { 
     $this->CurrentDate=$this->FromDate; 
    }//EOF rewind 

    public function valid() 
    { 
     //Kill hours/minutes/seconds. If we are to add hours and minutes iterators, we will need to rethink this. 
     return (floor($this->CurrentDate->format('U')/(3600*24)) <= floor($this->ToDate->format('U')/(3600*24))); 
    }//EOF valid  
}//EOF CLASS DateIterator 









class DaysIterator extends SiTEL_Dates_DateIterator 
{ 
    public function __construct(DateTime $DateI,DateTime $DateII) 
    { 
     parent::__construct($DateI,$DateII); 
    }//EOF constructor 

    public function next() 
    { 
     $this->CurrentDate->modify('+1 day'); 
    }//EOF next 

    public function key() 
    { 
     return $this->CurrentDate->format('d'); 
    }//EOF key 

}//EOD CLASS DaysIterator 

Answer 3

尝试使用unix时间戳并每次添加86400。这要比致电strtotime()快。你可以lookup timestamp conversions online。

<?php 
    $check_date = 1267228800; // '2010-02-27'; 
    $end_date = 1269388800; // '2010-03-24'; 

    while($check_date != $end_date){ 
     $check_date += 86400; 
     echo date("Ymd", $check_date) . '<br>'; 
    } 
?> 

Answer 4

以下是我喜欢做它：

$startDate = new DateTime('20100227'); 
$endDate = new DateTime('20100324'); 

while ($startDate <= $endDate) { 
    // your code here 
    ... 
    // go to the next day 
    $startDate->add(new DateInterval('P1D')); 
} 

我觉得这个人更清洁，它不需要像84600那样硬编码值。