post_thumbnail_url WordPress Filter Hook

The post_thumbnail_url hook is used to retrieve the URL of a post thumbnail. This hook can be used in a number of ways, such as to get the URL of a featured image or to get the URL of an image attached to a post.

apply_filters( 'post_thumbnail_url', string|false $thumbnail_url, int|WP_Post|null $post, string|int[] $size ) #