Error in adding to 2d array or looping through 2d array

Question

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);

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

Can i ask what is the purpose of the loop ?? Are you trying to extract dates of a given range — Baba
– Baba, Commented Oct 15, 2012 at 16:40
It's a function the takes a start and end DateTime objects and interval type and interval amount and returns an array of DateTime objects based on those criteria. — Casey
– Casey, Commented Oct 15, 2012 at 16:44
good idea. I get the same thing I get in the foreach loop. So the problem is in the while loop. — Casey
– Casey, Commented Oct 15, 2012 at 16:49
When I say I get the same thing I mean the array is full of the same date repeated over and over. — Casey
– Casey, Commented Oct 15, 2012 at 16:59

Baba · Accepted Answer · 2012-10-15 17:01:57Z

1

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

The error is from your loop

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

Also See

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

You while can be as simple as

$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;
}

Output

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

answered Oct 15, 2012 at 17:01

Baba

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3 Comments

Casey Over a year ago

The echo's are just for debugging the problem. The $to is used earlier in the function. This function takes in a start date end date interval type and an interval amount and returns an array of DateTime objects based on the supplied information. The echo in the while loop shows the correct dates but when I dump the $allDates array it shows the last date added for all positions in the array.

Baba Over a year ago

Ok which this can you see what you did wrong ?? or you still need help @Casey

Casey Over a year ago

@Baba I edited the question to, I hope, more clearly explain the problem.

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