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Posted by Jordan Miller on 09/07/05 20:22
Hello,
You simply need the $key variable, then you can set a new value for
$arr[$key] for each array element:
<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as $key => $value) {
$arr[$key] = $value * 2;
}
// $arr is now array(2, 4, 6, 8)
?>
http://www.php.net/foreach
If you have PHP 5, you can perhaps more efficiently do this:
> As of PHP 5, you can easily modify array's elements by preceding
> $value with &. This will assign reference instead of copying the
> value.
>
> <?php
> $arr = array(1, 2, 3, 4);
> foreach ($arr as &$value) {
> $value = $value * 2;
> }
> // $arr is now array(2, 4, 6, 8)
> ?>
>
>
Jordan
On Sep 7, 2005, at 12:14 PM, Sabine wrote:
> Hello to all,
>
> is it possible to assign values to the array for which I do the
> foreach-loop?
>
> foreach ($_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
>
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