Reply To: Change File url output for CDN

• John Huebner

• October 10, 2017 at 10:59 pm

There are a couple of choices.

1) Add an acf/format_value filter https://www.advancedcustomfields.com/resources/acf-format_value/

// filter with high priority to run after ACF
add_filter('acf/format_value/type=file', 'my_change_to_cdn', 20, 3);

See the filter documentation. In the filter you can replace the domain name of your site with the domain name of the cdn.

2) Get just the attachment ID and then do all the work of generating the URL yourself using standard WP functions and other code.

// 3rd parameter = false returns unformulated value
// which is the ID value for images and files
$attch_id = get_field('file_field_name', false, false);