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

I came up with the following function based on @salathe's one. It returns an array where each element is an array containing the leaf at index 0 and the array of the path keys at index 1:

function loosenMultiDimensionalArrayPathForEachVal($array) {
    $iterator = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($array), \RecursiveIteratorIterator::SELF_FIRST);        
    $iterator->rewind();
    $res = [];
    foreach ($iterator as $v) {
        $depth = $iterator->getDepth();
        for ($path = array(), $i = 0, $z = $depth; $i <= $z; $i++) {
            $path[] = $iterator->getSubIterator($i)->key();
        }
        $leaf = $array;
        foreach ($path as $pathKey) {
            $leaf = $leaf[$pathKey];
        }
        if (!is_array($leaf)) {
            $res[] = [
                $v,
                $path
            ];
        }
    }
    return $res;
}

The main reason I implemented this one is that $iterator->hasChildren() returns true if the current iterated leaf is an object. Therefore, I wouldn't be able to get the path of it that way.