apply_filters( 'post_thumbnail_html', string $html, int $post_id, int $post_thumbnail_id, string|int[] $size, string $attr )

Parameters

$html

(string) The post thumbnail HTML.

$post_id

(int) The post ID.

$post_thumbnail_id

(int) The post thumbnail ID.

$size

(string|int[]) Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).

$attr

(string) Query string of attributes.