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get_post_meta and add_post_meta not working - WordPress ...

add_post_meta ( $post->ID, '_ggowlccpy_merchant_ref', $ggowlccpy_order_id); $meta_query = new WP_Meta_Query(array( meta_key = '_ggowlccpy_merchant_ref', ...

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查詢 「Add_post_meta」的人也找了：

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