<?php function printArray($array, $path = []) { if (!is_array($array) || count($array) < 1) { return; } foreach ($array as $k => $v) { if (count($path) > 0) { echo implode(' -> ', $path) . ' -> '; } echo $k . PHP_EOL; printArray($v, array_merge($path, [$k])); } } $array = [ "Men" => [ "Sport shoes" => [ "Football shoes" => [] ], "Winter shoes" => [] ], "Women" => [], "Childrens" => [] ]; echo printArray($array);