Posted by Edward Vermillion on 09/07/05 20:22

Sabine wrote:
> Hello to all,
>
> is it possible to assign values to the array for which I do the
> foreach-loop?
>
> foreach ($_SESSION['arr1'] as $arr1) {
> foreach ($_SESSION['arr2'] as $arr2) {
> if ($arr1['id'] == $arr2['id']) {
> $arr1['selected'] = true;
> }
> } }
>
> I think $arr1 is only a temp-var, so the assignment won't reflect on
> $_SESSION['arr1'] . Is that right?
> Surely I can do it with a for-loop, but those arrays are a bit complex
> and a foreach would be much easier to read.
>
> Thanks in advance for your answers
> Sabine
>

Short answer is no.

foreach works on a copy of the array, so any chnges you make inside the
foreach loop are "lost" once you're outside of it. Although *inside* the
foreach the changes *are* valid.

What you can do is:

$newArray = array();

foreach ($_SESSION['arr1'] as $arr1) {
foreach ($_SESSION['arr2'] as $arr2) {
if ($arr1['id'] == $arr2['id']) {
$newArray['selected'] = true;
}
} }

Then reference $newArray instead of $arr1.

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