错误增加了二维数组或通过二维数组循环 [英] Error in adding to 2d array or looping through 2d array

问题描述

我在这个code的一个问题：

I have a problem in this code:

while ($end <= $to){
        $currentDates = array("from" => $start, "to"=>$end);
        $allDates[] = $currentDates;
        echo 'from: ', $currentDates["from"]->format("m-d-y"),'<br>';
        unset($currentDates);
        $start->add($intervalObj);
        $end->add($intervalObj);
    }

var_dump($allDates);

循环中的回波显示正确的值，但vardump显示最后日期要添加到阵列中的阵列的所有的位置

the echo in the loop shows the correct values but vardump shows the last dates to be added to the array in all the positions of the array

推荐答案

我不认为你需要2个循环为....

I don't think you need 2 loops for that ....

该错误是从你的循环

while ($end <= $to){
                ^-------  This was never used

另请参见

$currentDates = array("from" => $start, "to"=>$end);
         Not in the Condition  --^              ^---- To means something else 

您同时可以简单的

$start = new DateTime("2012-4-12");
$end = new DateTime("2012-12-12");
$dv = new DateInterval('P24D'); // Every 24 days

echo "<pre>";
while ( $start <= $end ) {
    echo "From ", $start->format('Y-m-d');
    $start->add($dv);
    echo " To ", $start->format('Y-m-d'), PHP_EOL;
}

输出

From 2012-04-12 To 2012-05-06
From 2012-05-06 To 2012-05-30
From 2012-05-30 To 2012-06-23
From 2012-06-23 To 2012-07-17
From 2012-07-17 To 2012-08-10
From 2012-08-10 To 2012-09-03
From 2012-09-03 To 2012-09-27
From 2012-09-27 To 2012-10-21
From 2012-10-21 To 2012-11-14
From 2012-11-14 To 2012-12-08
From 2012-12-08 To 2013-01-01

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