将数组转换为php中的字符串

Question

I am trying to convert this array

array(3) {
  ["Men"]=>
  array(2) {
    ["Sport shoes"]=>
    array(1) {
      ["Football shoes"]=>
      array(0) {
      }
    }
    ["Winter shoes"]=>
    array(0) {
    }
  }
  ["Women"]=>
  array(0) {
  }
  ["Childrens"]=>
  array(0) {
  }
}

to this result

Men
Men -> Sport shoes 
Men -> Sport Shoes -> Football shoes 
Men -> Winter shoes 
Women 
Childrens

I tried a lot of methods but without success. Can someone tell me how to do it.

Thank you.

Answer 1

It can be done with simple recursive function like this:

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]));
    }
}

Live demo

Answer 2

A possible recursive approach could work like this:

Starting with an empty string, iterate the array and append each key to the result. Before continuing to the next iteration, if the value is not empty, append the result of the recursive call. When you get to the end, you should have a string representing the entire structure.

function get_map(array $array, string $path = ''): string
{
    $result = '';
    foreach ($array as $key => $value) {
        $result .= "$path$key\n" . ($value ? get_map($value, "$path$key->") : '');
    }
    return $result;
}
echo get_map($array);