Laravel helper for merging two Json files matched by key value

mergeJson.php

public static function mergeJson($to, $from, $matchBy, $key)
  {
      $to = json_decode(file_get_contents(storage_path($to)));
      $from = json_decode(file_get_contents(storage_path($from)));

      $values = [];
      foreach($from as $object) {
          $values[$object->{$matchBy}] = $object->{$key};
      }

      $output = collect();
      foreach($to as $object) {
          $object->{$key} = new \stdClass;
          $object->{$key} = $values[$object->{$matchBy}];
          $output = $output->push($object);
      }
      return $output->toJson();
}