Description:
------------
replacing an array with a multidimensional array causes a variable overlap

Reproduce code:
---------------
<?php
	$show[0] = "james";
        // php must unset($show[0]);
	$show[0][1] = "kirk";
		
	echo("<pre>");
        print_r($show);
        echo("</pre>");
		
        foreach($show as $bb => $aa)
            echo $bb . " -- " . $aa;
?>

Expected result:
----------------
Array
(
    [0] => Array
        (
            [1] => kirk
        )

)

0 -- Array

Actual result:
--------------
Array
(
    [0] => jkmes
)

0 -- jkmes