variable question

Hi, could you perhaps help me out with this, trying to manipulate data from
a form with multiple radio button groups.

I have a loop..

for ($i = 1; $i <= $num; $i++) {

...then trying to use $i like this but it doesn't work..

import_request_variables('p', 'p_');
$who = $p_radio$i;

...also tried this but no luck..

$who = $_POST['radio$i'];

Anyone? Here's a snippet of the form:

<div class="fileattachment" id="fileatt1">
<input type="file" name="fileattachment1">
<input type="radio" name="radio1" value="Bob" checked>Bob
<input type="radio" name="radio1" value="Joe">Joe
</div>
<div class="fileattachment" id="fileatt2">
<input type="file" name="fileattachment2">
<input type="radio" name="radio2" value="Bob" checked="checked">Bob
<input type="radio" name="radio2" value="Joe">Joe
</div>

Cheers.


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