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並前往https://wordpress.stackexchange.com/questions/390677/differences-between-add-post-meta-and-update-post-meta

Differences between add_post_meta and update_post_meta

This: update_post_meta(42, 'my_meta_key', [ 'my_meta_value_1', 'my_meta_value_2', 'my_meta_value_3', ]);. Changes a single post meta, ...

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查詢 「Add_post_meta」的人也找了：

  1. Update_post_meta
    2.
  2. Get_post_meta
    3.
  3. Wp_insert_post
    4.
  4. Metadata_exists
    5.
  5. Delete_post_meta
    6.
  6. Add_meta_box
    7.
  7. Add_metadata
    8.
  8. Get_user_meta
    9.