wp_update_image_subsizes( int $attachment_id ): array|WP_Error

159function wp_update_image_subsizes( $attachment_id ) {160	$image_meta = wp_get_attachment_metadata( $attachment_id );161	$image_file = wp_get_original_image_path( $attachment_id );162 163	if ( empty( $image_meta ) || ! is_array( $image_meta ) ) {164		/*165		 * Previously failed upload?166		 * If there is an uploaded file, make all sub-sizes and generate all of the attachment meta.167		 */168		if ( ! empty( $image_file ) ) {169			$image_meta = wp_create_image_subsizes( $image_file, $attachment_id );170		} else {171			return new WP_Error( 'invalid_attachment', __( 'The attached file cannot be found.' ) );172		}173	} else {174		$missing_sizes = wp_get_missing_image_subsizes( $attachment_id );175 176		if ( empty( $missing_sizes ) ) {177			return $image_meta;178		}179 180		// This also updates the image meta.181		$image_meta = _wp_make_subsizes( $missing_sizes, $image_file, $image_meta, $attachment_id );182	}183 184	/** This filter is documented in wp-admin/includes/image.php */185	$image_meta = apply_filters( 'wp_generate_attachment_metadata', $image_meta, $attachment_id, 'update' );186 187	// Save the updated metadata.188	wp_update_attachment_metadata( $attachment_id, $image_meta );189 190	return $image_meta;191}