get from Arr::dot in laravel. just little modification

convert php multidimensional array to "POSTABLE" php array with php curl

function form_array($array, $prepend='')
{
  $results = [];
  foreach ($array as $key => $value) {
    if (is_array($value) && ! empty($value)) {
      if($prepend==''){
        $results = array_merge($results, form_array($value, $key));
      }else{
        $results = array_merge($results, form_array($value, $prepend.'['.$key.']'));
      }
    } else {
      if(is_array($value) && count($value)==0) $value = "[]";

      if($prepend==''){
        $results[$key] = $value;
      }else{
        $results[$prepend.'['.$key.']'] = $value;
      };
    }
  }
  return $results;
}