WordPress插件/主题开发中，如何获取文章发表用户的ID ？
LOOP循环中
官方文档：
get_the_author_meta( string $field = '', int|false $user_id = false )Retrieves the requested data of the author of the current post.
Description
Valid values for the $field parameter include:
- admin_color
- aim
- comment_shortcuts
- description
- display_name
- first_name
- ID
- jabber
- last_name
- nickname
- plugins_last_view
- plugins_per_page
- rich_editing
- syntax_highlighting
- user_activation_key
- user_description
- user_email
- user_firstname
- user_lastname
- user_level
- user_login
- user_nicename
- user_pass
- user_registered
- user_status
- user_url
- yim
Parameters
$field
(string) (Optional) The user field to retrieve.
Default value: ”$user_id
(int|false) (Optional) User ID.
Default value: false
Return
(string) The author’s field from the current author’s DB object, otherwise an empty string.
在循环外面通过以下方法获取用户ID
$author_id = get_post_field ('post_author', get_the_ID() );