acf/load_attachment хук-фильтр . ACF 1.0

Filters the attachment $response after it has been loaded.

Использование

add_filter( 'acf/load_attachment', 'filter_function_name_1921', 10, 3 );
function filter_function_name_1921( $response, $attachment, $meta ){
	// filter...

	return $response;
}

$response(массив)

Array of loaded attachment data.

$attachment(WP_Post)

Attachment object.

$meta(массив/false)

Array of attachment meta data, or false if there is none.

Где вызывается хук

return apply_filters( "acf/load_attachment", $response, $attachment, $meta );

Где используется хук в ядре Advanced Custom Fields