admin_post_thumbnail_html │ filter-hook │ WP 2.9.0

Filters the admin post thumbnail HTML markup to return.

Usage

add_filter( 'admin_post_thumbnail_html', 'wp_kama_admin_post_thumbnail_html_filter', 10, 3 );

/**
 * Function for `admin_post_thumbnail_html` filter-hook.
 * 
 * @param string   $content      Admin post thumbnail HTML markup.
 * @param int      $post_id      Post ID.
 * @param int|null $thumbnail_id Thumbnail attachment ID, or null if there isn't one.
 *
 * @return string
 */
function wp_kama_admin_post_thumbnail_html_filter( $content, $post_id, $thumbnail_id ){

	// filter...
	return $content;
}

$content(string)

Admin post thumbnail HTML markup.

$post_id(int)

Post ID.

$thumbnail_id(int|null)

Thumbnail attachment ID, or null if there isn't one.

Changelog

Where the hook is called

return apply_filters( 'admin_post_thumbnail_html', $content, $post->ID, $thumbnail_id );

Where the hook is used in WordPress