Online PHP editor | refs for 1atQk

<?php 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)); } } $obj = json_decode('{ "Group1": { "Blue": { "Round": [ "Harold", "Arthur", "Tom" ] }, "Green": { "Round": [ "Harold" ], "Circle": [ "Todd", "Mike" ] } }, "Group2": { "Blue": { "Round": [ "Peter" ] } } }', true); foreach (paths($obj) as $path) { printf("%s\n", $path); }