Recursively cycle every path of an array

Question

I have the following(json) object:

$obj = json_decode(\'{
    \"Group1\": {
        \"Blue\": {
            \"Round\": [
                \"Harold\",
                 


        

Answer 1

Here's my take with a generator function:

function paths(array $a)
{
    // if first item is an array, recurse
    if (is_array(reset($a))) {
        foreach ($a as $k => $v) {
            foreach (paths($v) as $path) {
                // yield "key - subpath"
                yield sprintf('%s - %s', $k, $path);
            }
        }
    } else {
        // yield leaf
        yield sprintf('(%s)', implode(', ', $a));
    }
}

foreach (paths($obj) as $path) {
    printf("%s\n", $path);
}

Try it online.