获取作者ID而不是作者nicename,以便使用WP_Query();
$author_list = array();
foreach((array)$authors_list as $author) $author_list[] = $author->ID;
// make comma separated string from author ids array
$author_list = implode(\',\', $author_list)
并更改wp查询参数
$author_posts_args = array(
\'author\' => $author_list,
\'post_type\' => \'post\',
\'cat\' => $colecti_id,
\'posts_per_page\' => \'4\',
);
$author_posts_query = new WP_Query($author_posts_args);