set_post_thumbnail
set_post_thumbnail ( $post, $thumbnail_id )
Parameters:- (int|WP_Post) post Post ID or post object where thumbnail should be attached.
- (int) thumbnail_id Thumbnail to attach.
Returns:- (int|bool) Post meta ID if the key didn't exist (ie. this is the first time that a thumbnail has been saved for the post), true on successful update, false on failure or if the value passed is the same as the one that is already in the database.
Defined at: - Introduced in WordPress: 3.1.0
- Deprecated in WordPress: —
Description
Sets the post thumbnail (featured image) for the given post.