Walk array recursively and print the path of the walk

Question

Can someone help me with some code or instructions on how to walk recursively an array and when reaching the last element print the full path to it? A simple echo will work

Answer 1

$a= array(1,2,3,4,5,6);
$val = end($a);
print_array($a,$val);
function print_array(&$arr, $val)
{
    if ($val === false)
        return;

    $curr = prev($arr);
    print_array($arr,$curr);
    echo $val;
}