递归函数返回数组始终为null

Question

尝试从api调用返回一个项目数组，var_dump会吐出我想要的数组，但返回值始终为null。我错过了什么？非常感谢

echo $param, $this->test

Answer 1

下面的固定和工作功能

function get_all_opened($mailgun, $domain, $list_address, $items, $page_advance = false, $next_url = false) {

  $end_point = "{$domain}/events";
  if($page_advance) {
    $end_point = "{$domain}/events/{$next_url}";
  }

  //API Call
  $stats = $mailgun->get($end_point, array(
      'event' => 'opened',
      'limit' => 25,
      'list' => $list_address
  ));


  $item_count = count($stats->http_response_body->items);

//add items to return array
  if($item_count > 0) {
    $items[] = $stats->http_response_body->items;
  }


  if($item_count > 24) {
    $next_parts = explode ('/', $stats->http_response_body->paging->next);
    $next_url = end($next_parts);
    return get_all_opened($mailgun, $domain, $list_address, $items, true, $next_url);
  } else {
    return $items;
  }

}