has_post_thumbnail │ filter-hook │ WP 5.1.0

Filters whether a post has a post thumbnail.

Usage

add_filter( 'has_post_thumbnail', 'wp_kama_has_post_thumbnail_filter', 10, 3 );

/**
 * Function for `has_post_thumbnail` filter-hook.
 * 
 * @param bool             $has_thumbnail true if the post has a post thumbnail, otherwise false.
 * @param int|WP_Post|null $post          Post ID or WP_Post object.
 * @param int|false        $thumbnail_id  Post thumbnail ID or false if the post does not exist.
 *
 * @return bool
 */
function wp_kama_has_post_thumbnail_filter( $has_thumbnail, $post, $thumbnail_id ){

	// filter...
	return $has_thumbnail;
}

$has_thumbnail(true|false)

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

$post(int|WP_Post|null)

Post ID or WP_Post object.
Default: global $post

$thumbnail_id(int|false)

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

Changelog

Where the hook is called

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

Where the hook is used in WordPress