Modify foreach loop at runtime

Asked Aug 31 '16 at 14:38

Active Aug 31 '16 at 14:38

Viewed 32 times

I need to modify looping of foreach loop while its running.

$array = array('a' => 10, 'b' => 20, 'c' => 30);
foreach($array as $key => $value) 
{
    echo $value. " ";
    if($key == 'b')
        $array['d'] = 40;
}
print_r($array);

I get output like 10 20 30 but, I want that to 10 20 30 40

Array was modify inside the loop perfectly and giving result Array ( [a] => 10 [b] => 20 [c] => 30 [d] => 40 )

Problem is foreach can't loop added element.

asked Aug 31 '16 at 14:38

GuRu

1,880
3
23
32

Do you just want to add this d => 40? Or can it be more elements? – Indrasis Datta Aug 31 '16 at 14:40
modifying the thing you're looping on WITHIN the loop is always a risky operation... – Marc B Aug 31 '16 at 14:41
@ObjectManipulator also for more elements. – GuRu Aug 31 '16 at 14:45
2

`$array = array('a' => 10, 'b' => 20, 'c' => 30); $yieldarray = function () use (&$array){ while(next($array)){ list($k,$v)=each($array); yield $k=>$v; } }; $yieldarray = $yieldarray(); foreach($yieldarray as $key => $value) { echo $value. " "; if($key == 'b') $array['d'] = 40; } print_r($array);` – JustOnUnderMillions Aug 31 '16 at 14:47
@GuRu That would do the trick, in PHP7. But do it not! :)) – JustOnUnderMillions Aug 31 '16 at 14:47
1

Little bug change the while like `while($next=each($array)){ list($k,$v)=$next; yield $k=>$v; }` – JustOnUnderMillions Aug 31 '16 at 14:49
Perfect answer @JustOnUnderMillions thanks a lot. – GuRu Aug 31 '16 at 14:56
Welcome in the world of PHP 7 ;) – JustOnUnderMillions Aug 31 '16 at 14:57

Modify foreach loop at runtime

0 Answers0