Filters whether a post has a post thumbnail.

Parameters

$has_thumbnailbool

true if the post has a post thumbnail, otherwise false.

$postint|WP_Post|null

Post ID or WP_Post object. Default is global $post.

$thumbnail_idint|false

Post thumbnail ID or false if the post does not exist.

Source

return (bool) apply_filters( 'has_post_thumbnail', $has_thumbnail, $post, $thumbnail_id );

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