Description:
------------
I believe I found an error in PHP 5.2.0-8+etch15 (cli)

<?php

$quad = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

echo $quad{8}; // I
echo $quad{08}; // A <- ERROR

echo $quad{9}; // K
echo $quad{09}; // A <- ERROR

?>

The other values {00} to {07} are working as expected. Why doesn'T {08} and {09} work? They should behave like {8} and {9} since 08 == 8 and 09 == 9.


Reproduce code:
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<?php

$quad = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

echo $quad{8}; // I
echo $quad{08}; // A <- ERROR

echo $quad{9}; // K
echo $quad{09}; // A <- ERROR

?>

Expected result:
----------------
Output: IIKK

Actual result:
--------------
Output: IAKA