Assign values in foreach-loop

[Sabine <phpdev@xxxxxxx>]

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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