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Manulik kanani completed Hot Air Ballooning 8 years, 1 month ago
The post thumbnail is just saved as post meta with the key: _thumbnail_id. So after you insert the post and get the post id, you can set the post meta for that post. The $thumbnail_id is just the ID of the image you’d like to set as the thumbnail, up to you since I can’t tell from your question what this should be.