Is there a way to get multiple values for a single input in a form submission?

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this is what I am trying to do:

On a web form I might have a select input with multiple selections enabled, however I want to have access to the list within PHP after submission.

<select multiple='true' name='myselect'>
 <option value='1'>1</option>
 <option value='2'>2</option>
</select>

so when this is submitted, I can see in the $HTTP_RAW_POST_DATA that myselect is submitted twice...
...&myselect=1&myselect=2&...

However, the $_POST array only has the last value eg.
$_POST['myselect'] == '2'
This makes sense because the last value is assigned to the key 'myselect'.

Is there a function or alternate way that will get an array back from the post-back without parsing through the $HTTP_RAW_POST_DATA (which is not always available since the php.ini file can turn it off)?

TIA
-MS

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