Utf encode deep nested array

utf8.php

   /**
     * Converts array into utf8
     *
     * @param Array $array
     * @return Array
     */
    function utf8_converter($array)
    {
        array_walk_recursive($array, function (&$item, $key) {
            if (!mb_detect_encoding($item, 'utf-8', true)) {
                    $item = utf8_encode($item);
            }
        });
    
        return $array;
    }