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  • Using an ACF relationship field to get children

    
    function recursive_children($parent_id) {
      children = get_field('relationship_field', $parent_id);
      if ($children) {
        foreach ($children as $child) {
          // do some stuff with child
          
          // recurse this child
          recursive_children($child->ID);
          
          // do some other stuff with child
        }
      }
    }