Get the Slugs for All Fields in an Advanced Custom Fields Flexible Content Field

April 19, 2017

The following function can be used to get the slugs of all fields in an Advanced Custom Fields flexible content field. By default, it returns the field slugs for the Flexible Content fields on the current page, but you can provide the optional $post_id argument to get the field slugs for any other post/page instead.

* Get the slugs for all fields in an ACF Flexible Content field.
* @param string $flexible_content_slug The slug of the Flexible Content field.
* @param int $post_id (optional) The ID of the post. Default is current post ID.
* @return array The field slugs. Emtpy array on error or if there are no fields.
function km_get_all_field_slugs_in_acf_flexible_content_field( $flexible_content_slug, $post_id = null ) {
$post_id = $post_id ?: get_the_ID();
$flexible_content_field = get_field( $flexible_content_slug, $post_id );
if ( ! is_array( $flexible_content_field ) ) {
return array();
return wp_list_pluck( $flexible_content_field, 'acf_fc_layout' );

Kellen Mace

Written by Kellen Mace, who lives in Rochester Hills, MI and builds cool stuff on the web. About Kellen // Follow him on Twitter →