We are trying using array wich contain as key a binary value.
We have no problem when storing this key and value in the array,
but when we want to get the key, the key is truncated  !

Tested with Php 4.0.6 and 4.1.0

<?
$key = "string\0withnull";
echo "strlen(" . urlencode($key) . ") = " . strlen($key) . "<br>";

$a = array($key => "val");

echo $a[$key] . "<br>";     // Result is correct

reset($a) ;
echo (key($a) == $key) ? "equal" : "not equal" ;    // part of the key is lost
echo "(" . urlencode(key($a)) ." == ". urlencode($key) .")" ;
?>