php create multidimensional array from flat one

Question

I have an array like this:

 \'foo\', 1 => \'bar\', ..., x => \'foobar\' );
?>

What is the fas

Answer 1

=0)
{
    $a = array();
    $a[$array[$i]] = $lasta;
    $lasta = $a;
    $i--;
}
?>

$a is the output.